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HomeMy WebLinkAboutNC0004308_More Information (Received)_20221216Focused Treatability Study Work Plan Badin Business Park Badin, North Carolina Prepared for: Alcoa corporation Prepared by: EHS Support December 2022 Focused Treatability Study Work Plan — Badin Business Park Table of Contents Table of Contents 1 Project Description and Goals 1 1.1 Project Description 1 1.2 Project Goals 1 1.3 Work Plan Organization 2 1.4 Project Approach — Adaptive Project Management 2 2 Background 5 2.1 Facility Description 5 2.2 NPDES Permitted Outfalls 6 2.3 Historical Mitigation Efforts and Fluoride in Outfall 005 10 2.4 Hydrogeologic Assessments and Fluoride Track Down Studies 11 3 Preliminary Technology Evaluation and Alternatives Screening 16 4 Scope of Focused Treatability Study 19 4.1 Task 1— Desktop Technology Review 20 4.2 Task 2 — Field Investigations 20 4.2.1 Task 2a — Sewer Salt Tracer Study 21 4.2.2 Task 2b — Excavation Works and Groundwater Extraction Points 21 4.2.3 Task 2c — Hydraulic Testing (Pumping) of Each Extraction Point 21 4.2.4 Task 2d — Facility Topographic Survey and Storm Sewer Study 23 4.3 Task 3 — Geochemical Testing of Water and Bench -Scale Studies 23 4.4 Task 4 — Field -Based Pilot Testing 25 5 Schedule and Reporting 27 6 Management and Staffing 29 7 References 30 EHS Support LLC Focused Treatability Study Work Plan — Badin Business Park Table of Contents List of In -Text Figures Figure 1-1 Figure 2-1 Figure 2-2 Figure 2-3 Figure 2-4 Figure 2-5 Figure 2-6 Figure 2-7 Treatability Study Adaptive Management Plan Decision Tree Facility Layout Stormwater Catchments and Permitted NPDES Locations Stormwater Network and Key NPDES Outfall Locations Historical NPDES Outfall Concentrations at Outfalls 005 2021 Electro-Magnetic Electrical Conductivity Survey Map Storm Sewer Maximum Inverts and Areas Where Storm Sewers Intercept PWR Groundwater 2021 Historical Track Down Study Data and Areas of Interest for Treatability Study List of Attached Tables Table 1 Table 2 Table 3 Table 4 General Response Actions Remedial Technologies Remedial Alternatives Remedial Alternative Data Gaps List of Appendices Appendix A Appendix B Hydrogeological Conceptual Site Model Update EVOQUA Standard Analytical Testing Regime EHS Support LLC ii Focused Treatability Study Work Plan — Badin Business Park Acronyms Acronyms ABL Alcoa Badin Landfill AOC area of concern CERCLA Comprehensive Environmental Response, Compensation, and Liability Act CMS Corrective Measures Study CSM Conceptual Site Model HCSM Hydrogeological Conceptual Site Model mg/g milligrams per gram mg/L milligrams per liter NAVD88 North American Vertical Datum 1988 NCDENR North Carolina Department of Environment and Natural Resources NCDEQ North Carolina Department of Environmental Quality NFA no further action NFI no further investigation NPDES National Pollutant Discharge Elimination System OBL Old Brick Landfill PWR partially weathered rock RCRA Resource Conservation and Recovery Act RFA RCRA Facility Assessment RFI RCRA Facility Investigation SWMU solid waste management unit TA treatment alternative USEPA United States Environmental Protection Agency Trademarks, trade names, company, or product names referenced herein are used for identification purposes only and are the property of their respective owners. EHS Support LLC iii Focused Treatability Study Work Plan — Badin Business Park Project Description and Goals 1 Project Description and Goals 1.1 Project Description This Focused Treatability Study Work Plan (Work Plan) has been developed in support of evaluating the alternatives for the management of fluoride -impacted water discharged from the Badin Business Park (Site), such that the Site may achieve compliance with the National Pollutant Discharge Elimination System (NPDES) fluoride discharge limits (1.8 milligrams per liter [mg/L]) at Outfall 005. The source of fluoride exceedances at Outfall 005 is infiltration of groundwater into the aged stormwater conveyance system. Recent efforts to plug the piping have resulted in material benefits and lowering of fluoride concentrations at Outfall 005. Fluoride -impacted groundwater is still entering the piping in areas where infrastructure intercepts the PWR. This workplan details supplemental investigations planned for 2023 that are aimed at verifying this conceptualization and determining an appropriate mitigation measure. This Work Plan also includes the Hydrogeological Conceptual Site Model (HCSM) Update (EHS Support, 2022) prepared by EHS Support and submitted as Appendix A. The HCSM Update findings provide insight into why recent remedial efforts have demonstrated improvement, but not consistent compliance with, permitted discharge limits. An understanding of the HCSM Update is essential, as this Work Plan introduces works to build upon the HCSM findings. Although a summary of the HCSM Update is provided (Section 2), a review of the HCSM Update is also recommended to provide a more thorough technical understanding of the need for certain work scope items. 1.2 Project Goals The goal of this focused treatability study is to collect information on potential compliance pathways to support a feasibility study. The feasibility study will review corrective measures to reduce fluoride concentrations in stormwater below the NPDES discharge criteria without causing unintended consequences. Based on a preliminary analysis of alternatives, the data collected will support the evaluation of stormwater and groundwater management options as well as fluoride treatment options at the Site. The proposed work is essential to determine the viability and practicality of various chemical and physical treatment alternatives. After completion of this work, a feasibility study for the selected corrective measure alternatives will be submitted for review and approval to the North Carolina Department of Environmental Quality (NCDEQ). This Work Plan has been designed to achieve the following: 1. Identify potential compliance pathways to achieve NPDES discharge limits at Outfall 005, through removal or migration pathway elimination. This will continue ongoing work to identify the sources and mass fluxes of fluoride that can be practically managed or treated to achieve compliance. 2. In combination with item 1, collect supplemental hydrogeological and geochemical information that will support the evaluation of source removal, or alternative stormwater management options. 3. Determine what methods can be used at this Site to capture or treat this mass flux or determine if mass removal will facilitate the achievement of this goal. EHS Support LLC 1 Focused Treatability Study Work Plan — Badin Business Park Project Description and Goals 4. Determine if in situ rather than ex situ methods, or a combination of methods, can be used to achieve compliance. In the development of these goals, it is critical to consider that treatment methods (and associated costs) are highly sensitive to the geochemical properties of the water and the volume of water that must be pumped/treated; therefore, the hydrogeological conceptualization is critical. Surface water (sourced from rainwater) and groundwater are geochemically different, which will have an impact on determining pretreatment and treatment methods. Furthermore, groundwater from different aquifers (saprolite versus partially weathered rock [PWR]) may also be geochemically different. Therefore, the aquifer conveying fluoride- impacted groundwater and its associated geochemical properties must be determined to effectively evaluate potential treatment alternatives. 1.3 Work Plan Organization The remainder of the Work Plan is structured as follows: • Section 2 focuses on the background of the Site, which is largely based on the HCSM Update, with additional information on past actions taken at the Site. • Section 3 includes a preliminary technology evaluation and alternatives screening for the Site, which is necessary to plan the treatability study actions. • Section 4 details the scope of work covered in this focused treatability study, as well as a discussion of other phases of investigation that are currently planned and will be finalized after receiving NCDEQ's input for this Work Plan. • Section 5 outlines the schedule for the proposed work and planned reporting to NCDEQ. • Section 6 details the proposed management and staffing for this Focused Treatability Study. 1.4 Project Approach —Adaptive Project Management As mentioned, the work product from this planned scope of work will be the delivery of a feasibility study with preferred management and treatment alternatives that have been selected for review and approval by NCDEQ. However, an adaptive management process is proposed for use in the pursuit of engineered solutions for Outfall 005. As defined in the United States Environmental Protection Agency (USEPA) guidance (USEPA, 2018): "Adaptive management is a formal and systematic site or project management approach centered on rigorous site planning and a firm understanding of site conditions and uncertainties. This technique, rooted in the sound use of science and technology, encourages continuous re-evaluation and management prioritization of site activities to account for new information and changing site conditions." Adaptive management uses a feedback loop that results in continuous improvement. Each step is used to inform the next step, and after action is taken, the performance is assessed and used to modify the plan for the next set of actions. By proceeding in this systematic fashion, each step in the process is accounted for and can build stakeholder consensus, while continuously moving forward. In this case, the adaptive management process will be terminated when fluoride concentrations at Outfall 005 are consistently below the regulatory limit. Figure 1-1 illustrates the adaptive management approach to field investigations. Its development process looks ahead to potential outcomes of field activities and identifies how the work will be adapted based on the performance of specific elements of the work. EHS Support LLC 2 Focused Treatability Study Work Plan — Badin Business Park Project Description and Goals Preliminary evaluation of treatment alternatives Focused Treatability Study Work Pian l Initial Source Identification Sewer Salt Tracer Study CF<1.8mg/L at outfall r Construct Extraction Points Success Failure Modify Extraction Point to ncrease Flo e No change in CF CF < Baseline and CF > 1.8 mg/L at outfall Extracted Potential Compliance Pathway Identified Water Failure* Notes: 005 = Outfall 005 and associated storm sewers CF = Concentration of Flouride F = Flouride mg/L = milligrams per liter MNA = Monitored Natural Attentuation NCDEQ= North Caroline Department of Environmental Quality PWR = Partially Weathered Rock Additional PWR F Source Identified? Treatment Study hTreatment Not Effective CF <1.8 mg/L at outfall with treatment and discharge to 005 Potential Compliance Pathway Identified Remedial Design L Remedial Action Operations, and Maintenance Feasibility Study NCDEQ Review and Remedy Acceptance No r Investigate non- PWR F sources Expanding groundwater plume Stable or shrinking groundwater plume MNA Additional Remediation Long Term Compliance Figure 1-1 Treatability Study Adaptive Management Plan Decision Tree EHS Support LLC 3 Focused Treatability Study Work Plan — Badin Business Park Project Description and Goals The adaptive management system will support an organized approach to define and implement an engineered solution and will provide regular updates to stakeholders on the progress. The proposed milestones and communications for this project are discussed in Section 5, with the goal of starting the Corrective Action Design Phase in October 2023. EHS Support LLC 4 Focused Treatability Study Work Plan — Badin Business Park Background 2 Background 2.1 Facility Description Areas where past operations occurred include 123-acre former Main Plant area, the 14-acre Alcoa Badin Landfill (ABL) located 500 feet southwest of the former Main Plant, and the 3-acre Old Brick Landfill (OBL) located 0.75 miles northeast of the former Main Plant. Badin Lake, located northeast of the main plant, was filled in the early 1900s for hydroelectric electricity generation, and the Badin Business Park, formerly known as the Badin Works Facility (Facility), operated from 1916 through 2007. In the mid- 1960s, potlines were redesigned and expanded at the Facility. Production output was lowered in 2002, ceased in 2007, and the Facility was permanently closed in 2010. Several buildings have been demolished since 2012. Figure 2-1 shows the current Facility layout. Note: Yellow dashed lines indicate ground elevation in units of feet (North American Vertical Datum 1988 [NAVD88]). Figure 2-1 Facility Layout Before closure, the facility generated approximately 2,700 tons per year of spent potlining from the production of aluminum metal. The USEPA considers spent potlining to be a hazardous waste that may pose a substantial hazard to human health or the environment when improperly transported, treated, stored, disposed of, or otherwise managed. On March 30, 1992, the facility was issued a Hazardous EHS Support LLC 5 Focused Treatability Study Work Plan — Badin Business Park Background Waste Management Permit to store spent potlining. The facility previously contained two hazardous waste management units (Buildings 206 North and 206 South) for spent potlining waste (K088). Building 206 North was a containment building, while Building 206 South was a container storage building. Both buildings were closed in July 2012. Since closure of the plant and the two hazardous waste management units, the facility does not regularly generate hazardous waste and does not contain any operational units where hazardous waste is (or will be) treated, disposed of, or stored. The Hazardous Waste Management Permit required the identification and investigation of solid waste management units (SWMUs) and areas of concern (ADCs) for potential adverse impact to the environmental media at the facility. A total of 49 SWMUs and AOCs have been identified. The Resource Conservation and Recovery Act (RCRA) Facility Assessment (RFA) Report (A.T. Kearney, 1990) includes information for SWMUs 1 through 34 and AOCs A and B. Information for SWMUs 35 through 47 was provided in subsequent correspondence to what is now the State of North Carolina Department of Environmental Quality (MFG Inc, 2001). As part of the RFA and subsequent processes, it was immediately determined that no further action (NFA) was required for 22 SWMUs. Confirmatory sampling was conducted at 5 units, samples demonstrated that no further investigation (NFI) was required. NFI was determined for 2 units, while 18 units were further investigated under the RCRA Facility Investigation (RFI) process, and 2 storage units were to be permitted. The results of these extensive investigations were evaluated and summarized in the March 1990 RFA Report (A.T. Kearney , 1990), June 1993 Confirmatory Sampling Report (Law Environmental, Inc. 1993), and March 2001 RFI Report (MFG Inc, 2001). The RFI Report was approved by the North Carolina Department of Environment and Natural Resources (NCDENR) on December 19, 2007. As a result of the investigations, interim measures, and remedial actions conducted to date, NFA or NFI status has been granted for all or a portion of 43 SWMUs. The two permitted storage units were properly closed. A portion of 9 SWMUs — including the groundwater at the Main Plant Area, groundwater at SWMU No. 2 (ABL), and groundwater at SWMU No. 3 (OBL) — were carried forward to the Corrective Measures Study (CMS). With the December 19, 2007, approval of the RFI Report (MFG, Inc., 2001), the CMS process was initiated to identify and evaluate remedial alternatives to address potential adverse impacts to the environment. CMS reports are currently under review by the NCDEQ, formerly the NCDENR. 2.2 NPDES Permitted Outfalls The Facility historically had a range of NPDES outfalls associated with the operation of the plant and the former waste areas including the ABL and OBL. NA in the Drainage Area Information table indicates not applicable. Figure 2-2 documents the NPDES permit outfalls contained in the April 2022 NPDES No. NC0004308 Permit Renewal (Alcoa, 2022). In accordance with the permit application, NPDES Permit Outfalls 005, 011, 012, 013, and 019 are permitted for non -process wastewater (NPDES Form 2E) while all NPDES locations are permitted for stormwater discharges associated with an industrial activity (NPDES Form 2F). NA in the Drainage Area Information table indicates not applicable. EHS Support LLC 6 Focused Treatability Study Work Plan — Badin Business Park Background Figure 2-2, Outfalls 002, 011, 012, 013, 020, and 019 discharge to Badin Lake. Outfalls 004, 005, and 017 discharge to an unnamed tributary to Little Mountain Creek. The current storm sewer drainage system and associated outfalls for the former Main Plant are shown on Figure 2-3. EHS Support LLC 7 Focused Treatability Study Work Plan — Badin Business Park Background 0 400 800 Feel ISOURCE: ESN WORLD IMAGERY ESRI WORLD IMAGERY f ARCGIS MAP SERVICE: RTTPOGOTO ARCGISONLINE.COM/MAPS)WORLD_ IMAGERY ACCESSED 0/29f2022. Outfall 017 Outfal 1005 Badin Lake Weir/Pump System Outfall 002 9 7 9 10 11 12 00 03 1947 19.52 939 5.29 20.11 090 02 94 5.3C 32.35 2-13 3 70 013 011 & C22 002 C29 NA -Sheet Flow 1109 NA- Sheet Flow w5 017 018 G 022 NA -Shen Flow 019 Outfall 019 Reiter ted Diedmme Of-un:weter& Stammerer Groundwater, stormwerer, & Fire Proteol,on Water stolmwater stormwarer skormwater - SheetFlRw ltumrwater Stdrmwater- Sheet FIpw Groundwater. Stormwater,& Fire Praten.on Water Sttmmwater Stamrwater Stdrntwater- StreetFlow Overflow from Retention Pond Badin Lake/ Yadkin River Badin lake/ Yadkin River Bedin Lake/ Yadkin River Bailin Lake/ Yadkin River 4ttle Mountain Creek little Mountain Creek lime Mduntaln Creek little Mountain Creek Uttle Mountain Creek Little Mountain Creek Little Mountain Creek Bailin lake/ Yadkin River NA in the Drainage Area Information table indicates not applicable. Figure 2-2 Stormwater Catchments and Permitted NPDES Locations EHS Support LLC 8 Focused Treatability Study Work Plan — Badin Business Park Background Street adin Landfill, Note: Red, yellow, blue, green, orange, and teal colors indicate sections (piping) of the storm sewer system directed to specific outfa I Is. The black lines indicate the approximate boundaries of the former Main Plant and the Alcoa Badin Landfill. Figure 2-3 Stormwater Network and Key NPDES Outfall Locations EHS Support LLC 9 Focused Treatability Study Work Plan — Badin Business Park Background 2.3 Historical Mitigation Efforts and Fluoride in Outfall 005 The termination of Facility operations, followed by decommissioning operations (including the removal of products and waste), and completing upgrades to the caps and drainage around the SWMUs have resulted in declines in the fluoride concentrations observed across the Facility, including Outfall 005. Surficial sources of fluoride have been identified and addressed with a combination of removing waste and contaminated soil along with cleaning the manholes, catch basins, and drains, all of which contributed to the declines in fluoride at Outfall 005 (Figure 2-4). The average fluoride concentration for Outfall 005 decreased from 3.57 mg/L to 1.94 mg/L, which is only slightly above the 1.8 mg/L NPDES limit. 25 5 2010 Outfall 005 Fluoride Compliance by Month 0 0 o0 n O O O 00 0 0 0 �▪ O cca O Oo 0 0 o Monthly AVG o Monthly MAX Mean Fluoride Before Nov. 2019=3.57 mg/L 0 0 0 0b, O O c1,.. q., �,,y, v cPCP O 007SY7 0 N u-O O WO 07 `Rir' �Cc ocoo "O�� p0 gg CR 0 1.8 ma/L Monthly Average Fluoride Limit O Mean Fluoride After Nov. 2019=1.94 mg/L 2012 AVG = average MAX = maximum mg/L = milligrams per liter 2014 2016 Date 2018 2020 Figure 2-4 Historical NPDES Outfall Concentrations at Outfalls 005 2022 In combination with these source management efforts, the following key efforts have also been conducted: 1. Following the identification of groundwater ingress into the storm sewers, several track down studies were completed that identified key areas of fluoride -impacted groundwater entry into the storm sewer. As part of these works, new storm sewers were constructed where piping does not interface with groundwater, several storm sewer sections were abandoned, and cement plugs were installed to prevent groundwater from flowing along the pipe bedding. 2. The drainage on the western side of the Facility was modified to facilitate diverting clean surface water around the potential contaminated areas and into the storm sewers leading to Outfall 005. In July 2022 Alcoa completed a series of investigations to identify if clean groundwater from the PWR upgradient of the former Main Plant area could be intercepted and diverted into the storm sewer system. This would have the benefit of providing additional flows of water that would dilute fluoride concentrations in the storm sewer and reduce the flux of groundwater toward an area of known EHS Support LLC 10 Focused Treatability Study Work Plan — Badin Business Park Background contamination (west fill area). While rock cores identified water to be present within the PWR in these areas, the test pits installed in the PWR, and underlying bedrock did not identify sufficient yields of water (just seepage) to make this approach viable. While this recent work was unsuccessful in providing sufficient dilution water to achieve compliance at NPDES Outfall 005, the work did support the development of a more robust hydrogeological conceptualization (Section 2.4). This new conceptualization has demonstrated that the PWR is the key hydrostratigraphic unit in which groundwater migrates (primarily in the north -to -south direction). It also has identified that areas where storm sewers intercept the PWR most likely account for the ingress of fluoride -impacted groundwater into the storm sewer. This development is extremely significant in that past mitigation efforts were based on a generalized Conceptual Site Model (CSM) and HCSM which considered a generally uniform west -to -east groundwater flow. 2.4 Hydrogeologic Assessments and Fluoride Track Down Studies Extensive investigations were completed in 2022 to better define the HCSM flow regime and potential interactions between groundwater and stormwater drainage systems. This HCSM is provided as Appendix A and includes a broad hydrogeological assessment of the former Main Plant and ABL. The investigations completed at the Facility (and documented in the HCSM Update) have demonstrated that the primary mechanisms of groundwater transport at this Facility occur within the PWR, which is being recharged through infiltration in the upland portions surrounding the Facility (predominantly to the west) and Badin Lake (which is in direct hydraulic communication with the PWR), which has higher water elevations than the groundwater system immediately adjacent to the lake. Groundwater flow within the PWR is to the south towards Little Mountain Creek which has an elevation 40 feet below the average water levels in Badin Lake as documented in the HCSM Update (Appendix A). In the historical development of the Facility, the overburden and saprolite materials were removed from large portions of the western and southern portions of the Facility and were used as fill materials. The result is that in many areas the PWR is at or close to the ground surface and covered by a thin cover of fill. Sections of building structures and stormwater drainage systems were constructed into the PWR. The installation process included excavation to below the water table. In some areas, excavation to install the storm sewer pipe penetrated the overlying fill or confining soils and directly intersected the PWR, allowing for infiltration of groundwater into discontinuities in the pipe or flow around the pipe. The presence of this preferential flow allows the groundwater to find points of infiltration along the pipe, contributes to the observed groundwater flow regime, and contributes to the presence of fluoride in stormwater. An assessment of the hydraulic properties of the PWR was completed in 2022 and demonstrated that the highly conductive PWR aquifer extends across the entire Facility. Within the main area of the plant, groundwater elevations measured in PWR wells were generally stable (primarily due to the leakage from Lake Badin into the PWR aquifer). The stability of groundwater levels and infiltration of groundwater into the stormwater pipes provide an explanation for the base flow at NPDES Outfall 005 that is observed during prolonged dry conditions. Furthermore, the highly conductive nature of the PWR has likely resulted in groundwater flow around cement plugs that were established as interim measures to reduce the infiltration of impacted groundwater into the stormwater drainage pipes and the flow EHS Support LLC 11 Focused Treatability Study Work Plan — Badin Business Park Background around these pipes. As shown in Figure 2-4 these interim measures have been partially effective (concentrations have been observed to decline), however, sustained compliance has not been achieved. Subsurface geophysics (using electrical conductivity and resistivity surveys), which were conducted during previous investigations, has identified areas of higher conductivity in groundwater near the stormwater drains. Whereas conductivity correlates with areas of higher salinity (and therefore potentially higher fluoride), the relationship between electrical conductivity and fluoride is not linear. The areas where stormwater drains are constructed into the PWR and also exhibit higher electrical conductivity are the key focus areas for the treatability study. Based on the potential presence of fluoride and the higher hydraulic conductivity of the PWR, these areas are considered to provide sufficient mass flux to explain the concentrations detected at Outfall 005. Termination or interception of the flow from these sections of the storm sewer would have a high chance of reducing the fluoride mass flux sufficiently to achieve compliance with the NPDES limits. Figure 2-5 depicts a 2021 electrical conductivity survey conducted at the Facility. It shows areas of higher electrical conductivity within groundwater to the north and west of the potlines. This includes an area where historical groundwater seep activity has been observed hydraulically downgradient of the west fill area. As shown in Figure 2-5, a major soil excavation was completed in the area of the former Bath Mill to remove fluoride -impacted soils that were a potential source of fluoride to groundwater. EHS Support LLC 12 Focused Treatability Study Work Plan — Badin Business Park Background Former Bath Crushing Mill Excavation Extents t Area where st Drains were LEGEND 32, 190 Hz Apparent Conductivity (mS/cm) -100 -145 -110 -75 40 5 30 65 100 115 170 1000 Map Scale (ft) 0 130 250 1"=130' ormwater capped Fizure 5 Multi -Frequency EM Evaluation 2021 Apparent Conductivity Results Map Badin Business Park Badin, NC GEOPHYSICAL EVALUATION Goa Solutions Ltd_ Figure 2-5 2021 Electro-Magnetic Electrical Conductivity Survey Map EHS Support LLC 13 Focused Treatability Study Work Plan — Badin Business Park Background As part of the 2022 hydrogeological investigations, an assessment of groundwater elevations and historical stormwater sampling was completed. The assessment identified several areas of interest where monitoring and hydrogeological data indicate potential contributions of fluoride -impacted groundwater to the storm sewers. Figure 2-6 depicts the storm sewer system; sections are shaded black to indicate where the storm sewer is installed within PWR and groundwater. LEGEND - Str*Srr - iktxm - $t 'n $Q( IWY9f: Inie,Sep5 P44'a Maxinur Uaiiy !wen Elea d FHA k4VQffi • 5iO 51D- 513 ®523-515 II 515.5t5 Q 516-5SX © 527-513 I] 533.519 519- 522 522 -533 MI > 533 amxtAto- Figure 2-6 Storm Sewer Maximum Inverts and Areas Where Storm Sewers Intercept PWR Groundwater EHS Support LLC 14 Focused Treatability Study Work Plan — Badin Business Park Background Figure 2-7 depicts a combination of historical stormwater quality data, where the storm sewer is installed within PWR, and areas of interest where impacted groundwater infiltration to the stormwater pipes is possible. Water extraction and treatment activities will be conducted based on the systematic assessment framework provided in Section 4. MW-219 (8/18/20221 0.075 mg/L F MW-218 (6/16(2022) <0.0040 mg/L F MW-39 (31222021) <0.040 mg/L F ctolo betimaz tUY:.urAdb4`oeK'1:J ETTi :}2.6OOc B301 (8/18/2022) 0.042 not F CInsite Landfill MW-37 (3/22/2021)( 100 mg/0.F J MW-33 (3/15/2021) 44 mg/L F B300 (01172022) <0.040mglLFSlurry B305 (6/172022) <0.0040 mg/L F B303 (6/17/2022) <0.0040 mg/L F B302(8/17/2022) <0.004(3 mg/L F BF-5 (3/15/2021) 1.1 mg/LF 2.400 (3/172021) 2.3m0/LF MW-103(3/3( 2.210 1.6 rrg3L2.6 mg/L F PO 2.200 2.7 mg/L 6 200 6'320 ' 2:100 2.7mg/LF 1 0-02 (31302020) ,. 0.14 mg/LF 0.37 mg/L F 8.620,m LETIMN 8;6101NLET MH MW 46 (3/10/2021) _ 88 mg/L F R.300 INLET MH 8.2001NLET MN 8.000INLET MH MW-29 (31152021) 13 mg/LF M W-35 (3222021) 6.3 mg/L F West FIII Area Seep (31162021 11 mg/LF Norm Sump (3/16/20211 6 mg/LF 7.000INLETMH TW004 (4/13/2021) 6.6 mg/L F 251u . �-2';ao TW003 (4113/2021) 4.8 mg/L F ,, T1l.6 TW002 (4/132021). 2510(3/16/2021) 5.5 mg/LF • 1.1 mg/L F 1.500 4.020 T0001 (4/132021) 3.4 rrg/L F 4.240 MW-104 (3/30/2020) 1.6 mg/LF MW-31 (3/30/2020) <0.040 mg/L F Outfal 005 (3/17/2021) 2.1 mg/L F Grove 002E FLOW METERING O Boring 9 Monitoring Well ti Temporary Well • Outfall • Seep • Stormwater Manhole — Stormwater Pipes — Shallow Stormwater Pipes Camera Infiltration Observations: Major 4mi• Minor Possible Water in Pipe Pipe Intersects Partially Weathered Rock - Storm Sewer Plugs Notes: mg/L= milligrams per liter = fluoride Figure 2-7 2021 Historical Track Down Study Data and Areas of Interest for Treatability Study EHS Support LLC 15 Focused Treatability Study Work Plan — Badin Business Park Preliminary Technology Evaluation and Alternatives Screening 3 Preliminary Technology Evaluation and Alternatives Screening A preliminary technology evaluation and alternative screening were conducted to guide the actions that will be included in the treatability study. The final feasibility study will build on the preliminary work included in this section. The primary goals of the alternative screening evaluation are to: 1. Establish general response actions that can be pursued to achieve compliant discharge from Outfall 005 (less than 1.8 mg/L of fluoride). 2. Screen remedial technologies and process options to ensure that only applicable technologies are evaluated. 3. Develop a range of treatment alternatives (TAs) and screen each TA for effectiveness, implementability, and cost. An initial screening of candidate treatment technologies was completed to aid in the development of the treatability study work plan and schedule. In accordance with RCRA and Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) guidance documents for feasibility studies, the "no action" option has been included in the screening tables, but it should be noted that this option is a standard default and cannot be selected due to non-compliance. Using the current understanding of the Facility, certain technologies are not retained for analysis based on low implementability, low effectiveness, or high costs. However, depending on the results of this treatability study, technologies that were eliminated in this preliminary evaluation may be revisited during the feasibility study. The general response actions include the following: • No action • Institutional controls • Containment • Removal • Treatment • Disposal The general response actions are defined in Table 1 (attached). All general response actions are retained for continuing screening. A range of physical remediation methods have been employed at the Facility that are designed to limit the infiltration of groundwater into the storm drains, evaluate the potential for groundwater diversion as a means of minimizing fluoride -impacted groundwater flux towards and into the storm drains, and provide a clean water source to lower fluoride concentrations below 1.8 mg/L at NPDES Outfall 005. The remaining options for management of the fluoride flux in groundwater from the Facility are limited to containment through pathway interception, treatment (both in situ and ex situ), and complete abandonment and/or removal of the subsurface stormwater infrastructure in the subsurface. End -of - pipe physical capture and treatment of stormwater at Outfall 005 is not considered practical or viable based on the magnitude of flow variability (i.e., ranging from dry to several thousand gallons per minute) and the low concentrations of fluoride present at the discharge. Technologies associated with these management options include: • No action • Institutional controls EHS Support LLC 16 Focused Treatability Study Work Plan — Badin Business Park Preliminary Technology Evaluation and Alternatives Screening • Storm sewer closure • Groundwater removal via extraction point (sumps, wells, drainage coils, etc.) • Combined stormwater and groundwater removal via pumping from existing manhole structures • Permeable reactive barriers • Spray irrigation/phytoremediation • Treatment works — activated alumina sequestration • Treatment works — bone char sequestration • Treatment works — calcium oxide adsorption • Treatment works — ion exchange resin • Treatment works — reverse osmosis • Treatment works — electrokinetic • Coagulation/flocculation • Discharge to on -site evaporation pond • Discharge to sanitary sewer • Discharge via Outfall 012 General treatment technologies are defined and discussed in Table 2 (attached). Of the treatment technologies evaluated, a subset was selected for continued analysis. The following treatment alternatives (TA) were developed using the technologies defined in Table 2 (attached): • TA-1: No Action • TA-2: Containment • TA-3: In Situ Treatment • TA-4a: Ex Situ Treatment — Spray Irrigation/Phytoremediation • TA-4b: Ex Situ Treatment —Activated Alumina Sequestration • TA-4c: Ex Situ Treatment — Bone Char Sequestration • TA-4d: Ex Situ Treatment — Calcium Oxide Sequestration • TA-4e: Ex Situ Treatment — Ion Exchange Resins • TA-4f: Ex Situ Treatment — Reverse Osmosis • TA-4g: Ex Situ Treatment — Electrokinetic Coagulation Flocculation • TA-4h: Ex Situ Treatment — Chemical Coagulation Flocculation • TA-5a: Removal/Disposal — Evaporation Pond • TA-5b: Removal/Disposal — Sanitary Sewer • TA-6: Discharge — Outfall 012 The TAs are screened for efficacy, implementability, and cost in Table 3 (attached). While all TAs have been retained for data evaluation, this Work Plan will focus on collecting the data needed to evaluate removal and TAs, specifically TA-4a through TA-4h. The data collected will also serve to support future bench -scale and pilot testing programs. This preliminary screening of in situ and ex situ fluoride treatment and management approaches will be updated based on discussions with the NCDEQ. Potential data gaps for each TA that will require further investigation are defined in Table 4 (attached). Badin Business Park is seeking NCDEQ feedback before finalizing the alternatives that will be evaluated in depth during additional phases. Technologies retained will be evaluated in subsequent steps including the bench -scale testing and pilot testing programs. EHS Support LLC 17 Focused Treatability Study Work Plan — Badin Business Park Preliminary Technology Evaluation and Alternatives Screening In the application of the TAs, it is critical to note that the effectiveness of technology will be affected by both treatment efficiency and the ability to access the key mass fluxes of fluoride resulting in exceedances of the NPDES discharge criteria. An advantage of treatment, if viable, is that the treated water, with concentrations well below 1.8 mg/L, can be discharged and/or continue to be allowed to infiltrate into the storm sewer, further reducing concentrations of fluoride at the Outfall 005. EHS Support LLC 18 Focused Treatability Study Work Plan — Badin Business Park Scope of Focused Treatability Study 4 Scope of Focused Treatability Study The treatability study is focused on addressing data gaps identified in Table 4 to provide data for the feasibility study. The data collection will be focused on identifying the potential compliance pathways through the removal and/or treatment of fluoride -impacted groundwater that is intercepted by the Facility storm sewer system. The general areas of interest for this scope of work, indicated by the red boxes on Figure 2-7, include sections of storm sewer where the storm sewers intersect the PWR and where groundwater fluoride concentrations have been observed to be greater than the NPDES Outfall 005 limits. As summarized in Section 2 and expanded upon in the HCSM, the hydraulic conductivity of saprolite and/or native fill soils (which includes the bedding materials around many of the shallow storm sewers) is low and the corresponding potential flux of groundwater into the storm sewer is small. However, in areas where the storm sewers are excavated into the PWR, the hydraulic conductivity of this unit and corresponding potential fluxes of groundwater into the storm sewer are orders of magnitude higher. Furthermore, the fluoride track down investigations confirm these observations and suggest a CSM where the fluoride exceedances in stormwater discharging to NPDES Outfall 005 are mainly associated with the infiltration of impacted groundwater into the existing storm sewer system from the PWR. To validate this CSM and enable the development of a permanent management approach, the initial groundwater extraction points will be constructed in the areas shown in Figure 2-7. The approach will be to determine if the removal of defined areas of groundwater mass flux into the storm sewer can facilitate compliance with NPDES discharge limits. This will require that groundwater pumping rates and connectivity to the formation are sufficient to capture the localized flow in the PWR (and associated mass flux into the sewer) and that the fluoride mass flux reduction results in compliance. Only through systematic and targeted pumping of discrete areas with increasing levels of intensity can an approach be developed for permanent achievement of the compliance criteria. As shown in Figure 1-1, the treatability study will begin with a salt tracer study that will evaluate how long groundwater resides in the stormwater system and its dilution in the stormwater system; this will be conducted while the groundwater extraction points are being constructed. This salt tracer study will help to define how long the groundwater resides in the stormwater system and provide additional qualitative estimates of how much dilution occurs in different sections. As part of this process, extracted groundwater samples (with potentially different geotechnical signatures) will be collected for analytical testing and bench -scale evaluations. The data provided by the samples will be used to evaluate how treatment can be effectively conducted. Collection of representative groundwater samples is imperative to the development of an effective treatment solution (especially for fluoride). Fluoride is the most electro-negative ion and has a very low molecular weight; therefore, it can be challenging to treat. Minor differences in geochemistry can result in major changes in pretreatment requirements. The treatability study will complete the following four tasks: 1. Task 1— Perform a desktop review of in situ and ex situ fluoride treatment technologies for evaluation in subsequent phases of work. This task has been partially completed (Section 3) with a preliminary screening of candidate technologies. 2. Task 2 — Conduct a field investigation focused on assessing the viability and means by which impacted groundwater can be intercepted before entering the storm sewers. EHS Support LLC 19 Focused Treatability Study Work Plan — Badin Business Park Scope of Focused Treatability Study 3. Task 3 — Perform geochemical testing of water and bench -scale studies to assess the kinetics and other considerations for in situ and ex situ treatment of fluoride -impacted groundwater. 4. Task 4 — Conduct pilot -scale testing of ex situ and in situ water treatment methods. To meet the goals and objectives of this study, the work will complete the following: 1. Identify the locations where groundwater can be accessed that will provide a material reduction in fluoride concentrations at Outfall 005 (and ultimately compliance with the NPDES fluoride limit). 2. Demonstrate that hydraulic pumping can effectively lower water levels in the PWR (over a prolonged period), limit the flux of groundwater into the storm sewers, and provide long-term compliance with the discharge limits. 3. Quantify the fluxes of groundwater that need to be pumped and obtain water geochemistry under pumping conditions so that vendor and bench -scale trials can be conducted to inform potential treatment alternatives. 4. Evaluate the means and methods for the treatment of fluoride -impacted water. 5. Develop, test, and implement the preferred water treatment methods under field -based conditions. 6. Evaluate other alternatives, including reconfiguration of the storm sewers, as an alternative to achieving compliance at NPDES Outfall 005. 4.1 Task 1— Desktop Technology Review Task 1 is focused on the identification and refinement of the list of candidate technologies for in situ and ex situ treatment of fluoride in groundwater and was preliminarily completed in Section 3. The review of likely technology alternatives is critical to inform the scope of the supplemental investigation (Task 2) and bench -scale testing (Task 3) that will be conducted as part of this project. To facilitate effective planning, a preliminary assessment of technologies is provided in Section 3. This will be finalized after input from the agency, and subsequent tasks may be modified based on the finalized technology evaluation. As shown in Figure 1-1, the desktop technology review is used to inform the feasibility of TAs, which leads to identifying the data gaps that require further investigation. 4.2 Task 2 — Field Investigations The field investigations will involve multiple components of work. The goals of the field investigations are as follows: 1. Verify and validate the findings of the fluoride track down studies and hydrogeologic conceptualization (Section 2.4) and demonstrate that the areas where the storm sewers extend into the PWR (where fluoride impacts are present) are those that contribute to fluoride NPDES exceedances. 2. Establish subsurface infrastructure that can support the removal of impacted groundwater and enable evaluation of the benefits of prolonged pumping in reducing the infiltration of groundwater into the storm sewer and associated declines in fluoride in NPDES Outfall 005. 3. Complete field inspections of the storm sewers and surveying of the Facility to aid in an engineering study that would look to replace or re -engineer the stormwater drainage systems. This could include replacing sections of the storm sewer system and/or abandoning the subsurface pipes to eliminate groundwater ingress (replacement with lined surface drains that do not have hydraulic communication with groundwater). EHS Support LLC 20 Focused Treatability Study Work Plan — Badin Business Park Scope of Focused Treatability Study 4. Complete long-term pump testing to assess the hydraulic connectivity of the location to the aquifer matrix and responses in adjacent monitoring wells and to flows within the storm sewer. 5. Support collection of groundwater chemistry and geochemistry data (under equilibrium pumping conditions) that can be used in vendor assessments, geochemical modeling, and bench -scale technology trials (Task 3). 6. Use the installed groundwater extraction infrastructure as part of the field -based pilot testing program (Task 4). It should be noted that the groundwater pumping locations will be selected such that the effects of discrete pumping in select areas can be assessed to define a long-term solution to achieving NPDES compliance. The proposed program of works can commence immediately/simultaneously with agency review and finalization of the Task 1 Desktop Technology Review. The proposed program of works will include Tasks 2a through 2d. 4.2.1 Task 2a — Sewer Salt Tracer Study The salt tracer study will consist of introducing known quantities and concentrations of salt water to sewer sections upgradient of Outfall 005. Downgradient manholes will be equipped with conductivity meters with data loggers. The conductivity meters will pick up the presence of the salt. Data collected will include the time required for the salt water to be conveyed between various manhole structures as well as quantitative data on the magnitude of infiltration between points based on variances in conductivity. As shown in Figure 1-1, the study will be used to inform the short-term pumping test and confirm the results of the track down study. 4.2.2 Task 2b — Excavation Works and Groundwater Extraction Points Test pits will be conducted in the primary focus area which is located to the northeastern extent of the Outfall 005 storm sewer (east of the west fill area) and adjacent to the existing stormwater drains (where the highest concentrations of fluoride have been observed). A secondary location will be selected further south near the former Bath Mill area as a conservative location for encountering groundwater (noting that the Bath Mill excavation discussed above did encounter groundwater at this location). If groundwater is present higher than 1 foot below the invert of the stormwater pipe, a groundwater extraction point (sump with drainage coil, or similar design) will be installed into the PWR to a minimum depth of 3 feet below the invert of the stormwater pipe or the water table (whatever is lower). This extraction point will be constructed in a manner that any preferential flow along the storm sewers is directed to the extraction point. Figure 1-1 shows how extraction point construction will lead to short-term pump testing; depending on the results of short-term pumping, extraction point construction may be revisited to increase flow. Where locations are identified as dry or with insufficient flow (Task 2b), additional recovery extraction points (at alternative locations) will be installed in the area to support groundwater removal and treatment. 4.2.3 Task 2c — Hydraulic Testing (Pumping) of Each Extraction Point Initial hydraulic testing of the extraction points will be conducted to determine several key factors critical to the design. Each extraction point will be equipped with an electrical submersible pump (with EHS Support LLC 21 Focused Treatability Study Work Plan — Badin Business Park Scope of Focused Treatability Study integrated float switches) and the pump will be routed to an open -top frac tank, pond, or similar containment vessel for temporary storage before discharge to the NPDES Outfall 012 storm sewer. This discharge is proposed as a temporary measure until the source of exceedances has been identified and sufficient design information is available to begin the bench -scale and pilot testing of treatment technologies. Water must be redirected from Outfall 005 to an alternate discharge location (e.g., Outfall 012) to enable the downstream assessment of changes in flow and fluoride concentrations in the storm sewer and outfall discharge. This will mimic the outcome of using a treatment or water management option while providing information critical to the design of the pilot system as well as the final remedy. Affirmative confirmation that the management of an identified mass flux will result in improved water quality and cessation of fluoride exceedances at Outfall 005 is an essential element of this work program. The water redirected to Outfall 012 drainage basin will comply with established permit discharge limits and will be significantly less than the calculated chronic and acute criteria evaluated under the existing NPDES permit ("Final NPDES Permit," 2019). The volume of water to be discharged to Outfall 012 will be below the maximum flow capacity of the outfall and may have to be throttled during larger storm events to avoid an overflow condition to Outfall 011. The hydraulic testing program will be conducted in several stages: 1. Short-term hydraulic pumping (a maximum of five days — daytime operations only) will be conducted to confirm the hydraulic efficiency of the extraction point and determine equilibrium pumping rates. A flow totalizer will be installed on the discharge of the pump to measure flows over the period. As shown in Figure 1-1, depending on the outcome of the initial short-term pumping tests, work may progress in two directions. If the test determines that sufficient flow is being intercepted, the extraction point will progress to the long-term pumping test as constructed. If the extraction point is producing insufficient flow, the extraction point may be modified to increase yield. If extraction point modifications are unsuccessful, efforts will be made to identify additional locations to intercept the groundwater in the PWR. If those efforts determine promising extraction point locations, extraction points will be relocated and undergo the same process. If no promising extraction point locations are determined, potential fluoride sources outside of the PWR will be investigated. 2. Long-term hydraulic pumping will be conducted to assess the hydraulic connection of the extraction point to groundwater water levels in the area and flows within the storm sewer, as well as changes in water quality in the downstream storm sewer system. It is proposed that a combination of the following methods will be used to assess the performance of long-term pumping: a. Where practical, measure flow at Outfall 005 and other manholes. b. Look for changes in stormwater flow in upstream and downstream manholes on either side of the pumping tests. c. Measure the groundwater levels in proximal wells to the recovery extraction point. d. Routinely measure fluoride concentrations from manholes downstream of the pumping in combination with the NPDES-specified monitoring at Outfall 005. The length of the long-term hydraulic pumping tests is unknown as it is uncertain how long it will take for equilibrium to be reached in the testing and/or for the responses to be observed downstream. It is anticipated that the long-term testing will not last longer than three months at any one location, with the two planned areas of pumping potentially requiring a total of six months. Further in the northwestern section of the western seep (downgradient of the West Fill Area), the extent of the area EHS Support LLC 22 Focused Treatability Study Work Plan — Badin Business Park Scope of Focused Treatability Study where PWR groundwater is in hydraulic communication with the storm sewer is large and multiple extraction points may need to be installed in this area to eliminate groundwater ingress into the storm sewer; pumping at these locations will occur simultaneously. As shown in Figure 1-1, the long-term pumping test is expected to have one of three potential outcomes: • Reduction of fluoride concentrations at Outfall 005 to below the 1.8 mg/L discharge limit. • Reduction of fluoride concentrations at Outfall 005, but not to below the 1.8 mg/L discharge limit. • No relevant change in fluoride concentrations at Outfall 005. If the result of long-term pumping is a reduction of fluoride concentrations at Outfall 005 to below 1.8 mg/L, then a potential pathway to compliance through the abandonment of the sewer has been identified. If the long-term pumping test results in a decrease in fluoride concentrations at Outfall 005, but not below the 1.8 mg/L discharge criteria, the data collected during the long-term pumping test will be used in combination with data collected during Task 3 to determine if treatment and discharge to Outfall 005 can achieve compliance. If there is no change in the fluoride concentrations at Outfall 005, efforts will be made to identify additional locations to intercept the groundwater in the PWR. If those efforts determine there are promising extraction point locations, extraction points will be relocated and will undergo the same process. If no promising extraction point locations are determined, potential fluoride sources outside of the PWR will be investigated. 4.2.4 Task 2d — Facility Topographic Survey and Storm Sewer Study As documented earlier, one potential solution is re -engineering the storm sewers to prevent the ingress of groundwater into the system. This work could involve the abandonment of sections of the drain and development of an alternative drainage system. Two key tasks are proposed to support this work: 1. Perform further inspections of the storm sewers and manholes at the Facility. Excavations conducted as part of the proposed installation of extraction points will enable a detailed inspection of the existing storm sewers and confirmation of construction to be performed. 2. Complete a detailed topographic survey and confirm the storm sewer inverts. The purpose of this work is to facilitate an engineering review of the storm sewers and provide critical data to support development of an alternative drainage system. 4.3 Task 3 — Geochemical Testing of Water and Bench -Scale Studies The HCSM (Appendix A), as currently developed, has limited data on the nature and extent of groundwater impacts (within the recently installed groundwater monitoring network) and the geochemistry of the groundwater (which directly impacts treatability). As detailed in the HCSM, a comprehensive Facility -wide groundwater monitoring event is proposed for the Site in the first quarter of 2023. This groundwater sampling event will use a combination of historical wells and recently installed PWR wells. In combination with the groundwater sampling event, surface water (Badin Lake), stormwater (from within the storm sewer), and pumped groundwater (from the long-term pump tests) samples will also be collected for chemical analysis. This data will be used in combination within the groundwater sampling data to inform the HCSM and, based on the unique geochemical properties of each water EHS Support LLC 23 Focused Treatability Study Work Plan — Badin Business Park Scope of Focused Treatability Study source, determine the following (which aids in validating the CSM and confirms that PWR groundwater is the source of fluoride in the storm sewers): 1. Relative percentage of Badin Lake water in groundwater proximal to the lake 2. Relative percentage of PWR water in the storm sewer 3. Relative percentage of water contributed from the lake, PWR, and shallow groundwater system in water extracted from the extraction points during the long-term pump tests The ability to calculate these relative percentages is contingent upon there being unique base cation and anion differences between these water sources. In addition to validating the HCSM, the geochemistry data is also critical to understanding the corrosiveness and scaling/fouling potential of the groundwater that may require treatment. As highlighted in the screening of treatment technologies, several water treatment technologies are highly susceptible to fouling, and pretreatment may be required to ensure optimal treatment performance. In addition, the presence of other cations and anions can have an impact on treatment performance by competition for sorption sites or the presence of pH and alkalinity conditions not being conducive to optimal performance. It is expected that Badin Business Park will collaborate with water treatment vendors in execution of Task 3. Numerous water treatment vendors have developed "models" designed to predict the performance of various water treatment systems including, for example, reactive media, ion exchange, and reverse osmosis. Based on previous treatability studies conducted for similar sites, a standard analytical suite has been defined (Appendix B), but additional testing may be required. The analytical suite selected for testing is designed to evaluate treatment efficiency but also to assess fouling (biological and chemical) potential. Treatment systems need to be designed for standard operating conditions that come with continuous pumping. The groundwater geochemistry following prolonged pumping can be notably different than the geochemistry in samples collected at the onset of pumping. For this reason, the groundwater produced from the short- and long-term pumping tests (Task 2), will be periodically sampled and tested for the analytical suite. The standard process of assessment involves the following: 1. Task 3a — Collect water samples throughout the pumping tests and analyze them for the analytical suite. 2. Task 3b — Provide data to vendors to model treatability. This step is important as vendors determine the anticipated performance and critically note any pretreatment requirements that need to be considered in bench -scale testing and system design. 3. Task 3c — Review the information provided by the vendor, including modeled data, and determine if retained alternatives need to be adjusted. 4. Task 3d — Develop a bench -scale testing program cognizant of constraints, limitations, and pretreatment requirements identified by the vendor. S. Task 3e — Implement bench -scale testing and analyze the data. Note that many of the vendors have rapid column test methods that are used to assess the performance of resin under field conditions; however, where fouling is a concern, longer -term column tests may be required to determine the fouling potential and performance. For reverse osmosis, models are typically used to determine the osmotic pressures for treatment, the number of treatment stages, and the predicted performance. As part of the selection process (based on osmotic pressures), membranes are selected and sized, then fouling potential and pretreatment can be determined. Key outputs from the vendor modeling for reverse osmosis will comprise: EHS Support LLC 24 Focused Treatability Study Work Plan — Badin Business Park Scope of Focused Treatability Study 1. Stages of reverse osmosis required (one, two, or three stages). 2. Percentage of permeate vs. reject brine (note that reject brine will have to be transported off - site for disposal). 3. Predicted permeate and reject water quality. 4. Pretreatment specifications (pH and filtration). 5. Operation pressures and energy usage. 6. Membrane sizing and fouling potential (and associated up time); fouling potential is also evaluated using bench -scale trials. 4.4 Task 4 — Field -Based Pilot Testing As previously communicated in the October 2019 meeting with NCDEQ, the treatment of stormwater to below 2 mg/L was shown as not practical. However, the previous assessment focused on an end -of -pipe treatment solution where discharge concentrations are already near the practical treatment concentration. Whereas this assessment will focus on groundwater extraction and treatment before ingress into the storm sewer, targeting higher fluoride concentrations and smaller volumes will provide a more optimal solution. Treatment of higher concentrated groundwater before ingress into the sewer (for example from 8 to 10 mg/L to 2 mg/L) may be sufficient (in combination with the past mitigation efforts) to achieve concentrations consistently below 1.8 mg/L at Outfall 005. The key challenge is verifying the areas of mass flux into the sewer and effectively capturing and treating this water. Alcoa has a long history of using reactive media for the treatment of fluoride and, in the context of treatment alternatives, activated alumina, bone char, and calcium oxide have been found to be reliable and cost-effective treatment alternatives for both ex situ and in situ treatment. In this context consider that activated alumina is considered a presumptive treatment remedy and field testing can be conducted in parallel with the bench -scale testing for other technologies. In the United States and Europe, Alcoa has used activated alumina for the treatment of process water and stormwater at active aluminum smelting sites. Numerous different configurations of treatment have been conducted and the exact configuration of treatment for this Site has not been determined. While activated alumina has limitations on treatment of high pH landfill leachate (pH greater than 8), under more neutral to weakly acidic conditions (like the majority of groundwater at this Site with a pH between 5.5 and 6.5) the reaction kinetics are highly favorable and in the range of 8 to 20 milligrams per gram (mg/g) sorption capacity. Other treatment technologies have been applied including the use of alkaline precipitation with lime and calcium chloride and the use of bone char; however, the kinetics of adsorption with activated alumina have proven to be better. It is expected that, under equilibrium pumping conditions, the fluoride concentration will decline, and the pH will drop to background pH conditions, which are optimal for activated alumina. Based on rainwater, Badin Lake and groundwater (outside of the waste management units) have a pH near 5.5; the natural condition of the water is considered suitable for treatment. However, if the pH of the water is outside these limits, then a pH adjustment may be required before application onto the reactive media. A primary issue with the treatment of groundwater is the potential that colloidal materials will result in fouling of media over time. To avoid fouling pretreatment, alternative surface application, or in situ treatment methods can be employed. It is proposed that initial trials will include the spray application of EHS Support LLC 25 Focused Treatability Study Work Plan — Badin Business Park Scope of Focused Treatability Study groundwater onto a surface bed of activated alumina (or simply a surficial flow -through system), as opposed to a contained media vessel. Both recommended approaches can include simple methods for filtering (sand guard layers) and also provide the capacity for simple, manual removal of accumulated silts and clays. Furthermore, these methods use very large surface areas, have long contact times, and are less susceptible to fouling. It is proposed that the combination of geochemistry data (as described earlier) and field -based pilot test performance be used to evaluate the effectiveness of these presumptive treatment methods. The reactive alumina treatment will likely be tested as part of the long-term pump testing described earlier, assuming logistical and planning considerations are resolved and treatment isotherms developed. Ultimately, how the reactive media is employed will be determined by a range of other logistical factors as well as the information obtained from the previous work tasks. Reactive media can be used in a range of in situ and ex situ treatment methods that can be considered at this Facility and can be deployed in various configurations, including: 1. Use of engineered wetlands with reactive media flow -through treatment cells 2. In situ -permeable reactive barriers 3. Funnel and gate systems 4. Vessel -based treatment units as part of a groundwater treatment system 5. Reactive media recirculation cells (extraction and reinjection centers) 6. Treatment cells where groundwater pumping is conducted to induce the flow of impacted groundwater through the treatment media For all of the treatment media (activated alumina, bone char, etc.), the reaction kinetics are similar; therefore, the proposed application methodology can be used for the evaluation and design of a broad range of options. Task 3 and Task 4 comprise the Treatment Study as shown in Figure 1-1. If it is found that treatment is effective and the discharge at Outfall 005 remains below the 1.8 mg/L limit, a potential compliance pathway has been identified. If treatment is ineffective, efforts will be made to identify additional locations to intercept the groundwater in the PWR. If those effort determine promising extraction point locations, extraction points will be relocated and will undergo the same process. If no promising extraction point locations are determined, potential fluoride sources outside of the PWR will be investigated. EHS Support LLC 26 Focused Treatability Study Work Plan — Badin Business Park Schedule and Reporting 5 Schedule and Reporting As described earlier, the program of works involves a very systematic evaluation of technologies with desktop, bench -scale, and pilot testing. The ultimate goal of this program of work is the development of a focused feasibility study with recommended alternatives to be reviewed by NCDEQ and collaboratively selected for implementation. It should be noted in the development of this work program that the proposed pilot testing has been designed to achieve compliance with the NPDES limits during base flow conditions within the storm sewer. However, the viability of treatment and the need for additional performance information will still need to be assessed to design a system that may address all flow and mass flux requirements. The proposed program of work is as follows: • November 29 and 30, 2022 — Conduct Site walk and project planning. • December 15, 2022 — Issue conceptual designs and place orders for materials and equipment for installation of recovery extraction points (including associated piping). • January 15, 2023 — Begin excavating and constructing extraction points and drainage systems. • February 28, 2023 — Begin seven-day pump tests at each of the extraction point locations sequentially to determine sustainable yield and determine the long-term pump test program. • March 30, 2023 — Begin long-term pump tests. The initial configuration is proposed to be as follows, but based on the short-term pump tests, multiple extraction points may be pumped at the same time and pumping timeframes may be shortened or lengthened. The following is the timing for the proposed test program: o Northwestern Location (Location 1) — March 30 to May 30, 2023 (focused in the area with potential highest observed concentrations) o Northwestern Seep Location (Location 2) — May 30 to July 30, 2023 o Eastern Location (Location 3) —July 30 to September 30, 2023 • Begin construction and implement pilot test — June 15, 2023. • Comprehensive groundwater monitoring event data is available by July 30, 2023. • Perform geochemical and bench -scale testing (potentially only using data from Locations 1 and 3): o Location 1—June 15 to July 15, 2023 o Location 3 — August 15 to September 15, 2023 • Issue Focused Feasibility Study Report — November 1, 2023. As part of this program of works, it is proposed to provide NCDEQ with routine monthly updates. This will comprise information on the following: 1. Construction program and installation of the extraction points and associated piping infrastructure. 2. Performance of the short-term pump tests including yields from each extraction point, responses observed in adjacent wells, and changes in flow within the storm drains. 3. Long-term pump tests and observed changes in flow and concentrations of fluoride at various location within the storm sewers. Proposed changes to the long-term pump testing program (based on field observations and laboratory data) will be discussed. 4. Sampling and analytical testing to support vendor assessment of treatability. 5. Routine updates on the status and findings of the bench -scale testing. 6. The final design of the pilot testing and the implementation schedule will be documented. 7. Preliminary data from field trials. EHS Support LLC 27 Focused Treatability Study Work Plan — Badin Business Park Schedule and Reporting In conjunction with this scope of work, the NPDES monitoring and discharge monitoring reports will be completed as required by the permit. To aid the assessment of data, all available NPDES data will also be included in the monthly reports and the effects of the proposed actions on fluoride concentration at Outfall 005 will be discussed. These monthly reports are designed to keep stakeholders informed of progress and, in combination with conference calls and meetings, the project work will be advanced. A formal Focused Feasibility Study Report will be submitted to NCDEQ for review and comment at the completion of this work. As noted earlier, this report will have recommendations for a final approach, which we anticipate NCDEQ will need to review and approve. This report will be supported by technical memoranda for each of the components of work described, with the key findings from this program of works summarized in the main report. EHS Support LLC 28 Focused Treatability Study Work Plan — Badin Business Park Management and Staffing 6 Management and Staffing The Project Director, Mr. Nigel Goulding of EHS Support, will lead the Focused Treatability Study effort with support from the following: • Cameron Dixon (Principal Remediation Engineer) • John Angelone (Project Remediation Engineer) • Brandon Dean (Project Chemical Engineer) • Mike Worden (Principal Geologist and Field Coordinator) To execute this work, local engineering and contracting companies will be used to complete construction and operations and maintenance activities. EHS Support LLC 29 Focused Treatability Study Work Plan — Badin Business Park References 7 References A.T. Kearney, Inc. 1990. EPA Contract No. 68-W9-004; Work Assignment No. R04-05-04; Alcoa Badin Works, North Carolina; EPA I.D. No. NCD003162542; Interim RFA Report; Final Deliverable. March 1. Alcoa. 2022. Badin Business Park LLC NPDES No. NC0004308 Permit Renewal Application. April 25. EHS Support. 2022. Hydrogeological Conceptual Site Model Update. December. Final NPDES Permit NC0004308 Badin Business Park LLC Stanly County Class I Facility, North Carolina Department of Environmental Quality, Division of Water Resources. July 2, 2019. Law Environmental, Inc. 1993. Confirmatory Sampling Report. June 28. MFG Inc. 2001. RCRA Facility Investigation Report Volume I of II. Alcoa Badin Works, Badin, North Carolina. March. USEPA. 2018. Superfund Task Force Recommendation #3: Broaden the Use of Adaptive Management. July 3. EHS Support LLC 30 Focused Treatability Study Work Plan — Badin Business Park Tables EHS Support LLC Table 1 General Response Actions Focused Treatability Study Work Plan Badin Business Park - Badin, North Carolina Alcoa Corporation General Response Actions Action Description No Action No action is taken. This option is included for comparative purposes. Institutional Controls Implement institutional controls. Controls may include land use restrictions or water use restrictions. Containment Isolate contamination from the surrounding environment and receptors. Typically consists of a physical barrier blocking potential exposure pathways and preventing contaminant mobilization. Often used in conjunction with institutional controls. Can also consist of removing pathways that contaminated material use to reach the surface, such as subsurface storm drains. Removal Physically remove contaminated media from the environment. Groundwater is often collected by pumping from wells or sumps. Soil is typically excavated mechanically. Removal actions are often used in conjunction with treatment or disposal actions. Treatment Contaminated media is subjected to a process that will reduce the toxicity, mobility, or quantity of contaminants. Treatment can be performed in situ or ex situ and results in the reduction or elimination of risk. Disposal Contaminated media and/or its treatment byproducts are removed then transported to an appropriate off -site location, reducing the potential for exposure. Often used in conjunction with other actions. EHS Support 1 of 1 Table 2 Remedial Technologies Focused Treatability Study Work Plan Badin Business Park - Badin, North Carolina Alcoa Corporation Technology Type Description Comments Retained No Action No Action No Action. Ineffective. No Action in included for comparative purposes only. Yes, for comparative purposes only. Land Use Controls Institutional Controls Institutional controls are administrative or legal practices used to prevent contaminant exposure. These practices can include groundwater use restrictions, land use restrictions, soil/water management plans, and signage. Not applicable to the Site on its own, however institutional controls are often a part of a successful remedial alternative. No, as institutional controls will not address exceedances in stormwater. May be evaluated in future feasibility studies in combination with other technologies. Containment Storm Sewer Closure Remove or abandon the existing storm sewer structures. This technology will require that the subsurface storm sewer be fully removed or abandoned to ensure no incidental discharges occur due to preferential pathways provided by existing infrastructure. Stormwater will be handled through construction of surface stormwater swales and management structures. Yes. Removal Combined stormwater and groundwater removal via pumping from existing manhole structures Impacted water would be removed through installation of pumps installed in manholes throughout the stormwater system, possibly combined with plugs and/or new manhole structures with larger sumps for collection of water. This option would require significant piping and new infrastructure to collect water for treatment or disposal. It would also not be possible to remove water generated from anything other than very minor storm events. However, this may be an option for intercepting base groundwater infiltration in areas where ponding is observed in the stormwater pipes, removing mass from those areas. No, as it is not practicable to remove stormwater flows from network. Remove Groundwater via Sumps Impacted groundwater is captured by sumps installed along preferential pathways and suspected points of ingress along the sewer. Environmental pumps located in the sumps draw in groundwater and extract the groundwater prior to storm sewer ingress, preventing or reducing discharge of impacted water from Outfall 005. An advantage for pumping the sumps to capture groundwater is it creates a depression in the groundwater table, which then pulls groundwater from potentially unidentified pathways. Yes. Treatment Permeable Reactive Barrier A permeable reactive barrier is an in situ remedial technology where a reactive media (e.g., activated alumina, bone char, or calcium oxide) are strategically placed in the subsurface to intercept impacted groundwater and adsorb the fluoride as the groundwater passes through the media. An effective method for fluoride remediation provided that critical flow paths can be identified and intersected. Requires accurate and detailed information of subsurface flow patterns. Yes Spray lrrigation/Phytoremediation Contaminated groundwater is pumped and sprayed onto excess land. The water will evaporate, thereby sequestering fluoride into the unused soil. The potential exists for fluoride migration from the soils. Plant species with resistance to fluoride are required, as many species of plants will exhibit terminal failure as fluoride accumulates within the biomass. Yes EHS Support 1 of 3 Table 2 Remedial Technologies Focused Treatability Study Work Plan Badin Business Park - Badin, North Carolina Alcoa Corporation Technology Type Description Comments Retained Treatment Works - Activated Alumina Adsorption Extracted groundwater is pumped through media beds containing activated alumina. The media beds can be in typical pressurized media vessels or in a passive open media container. Dissolved fluoride in water reacts with the activated alumina to chemically adsorb the fluoride. This treatment technology is effective for removing fluoride from water. To prevent fouling of the sequestration media process, water will need to be pretreated to address the pH, alkalinity, suspended solids, and other potential water quality parameters. Bench -scale testing will determine what treatment train options are required. Activated alumina can be regenerated, but the process is complex and it is typically more practical for media consumed during the treatment process to be stored and sent off -site for disposal. Yes Treatment Works - Bone Char Adsorption Extracted groundwater is pumped through media beds containing bone char. Bone char is a form of activated carbon generated from animal bones. Typically, activated carbon is ineffective when targeting fluoride, but bone char contains hydroxyapatite which will adsorb fluoride. The media beds can be in typical pressurized media vessels or in a passive open media container. Dissolved fluoride in water reacts with the activated alumina to chemically adsorb the fluoride. This treatment technology is effective for removing fluoride from water. To prevent fouling of the sequestration media process, water will need to be pretreated to address the pH, alkalinity, suspended solids, and other potential water quality parameters. Bench -scale testing will determine what treatment train options are required. Bone char consumed during the treatment process will be stored and sent off -site for disposal. Yes Treatment Works - Calcium Oxide Adsorption Extracted groundwater is pumped through media beds containing calcium oxide. The media beds can be in typical pressurized media vessels or in a passive open media container. Dissolved fluoride in water reacts with the calcium oxide to chemically adsorb the fluoride. This treatment technology is effective for removing fluoride from water. To prevent fouling of the sequestration media process, water will need to be pretreated to address the pH, alkalinity, suspended solids, and other potential water quality parameters. Bench -scale testing will determine what treatment train options are required. Yes Treatment Works - Ion Exchange Extracted groundwater is passed through vessels containing specially designed anion resins. Low concentrations of fluoride can be removed through the use of a strong base anion resin. Effluent levels of less than 1 part per million can be achieved. This treatment technology is effective, particularly for polishing. Resins are sensitive to fouling. Anionic resin is not selective for fluoride and will interact with other anions. Maintenance of the resins requires regeneration with sodium chloride solution. Yes Treatment Works - Reverse Osmosis Reverse osmosis is the process of forcing a solvent, in this case water, from a region of high solute concentration through a membrane to a region of low solute concentration through the application of pressure greater than the osmotic pressure of the balance. The technology has been shown to be effective in removing fluoride from water. This treatment option will produce brine, which will have to be stored and disposed of. Yes Treatment Works - Electrokinetic Coagulation/Flocculation ECF is an adaptation of traditional coagulation and flocculation techniques. Metals, such as iron and aluminum, are added to the process water and introduced to an electrical current in place of chemical coagulants and flocculants. The process makes use of three separate processes to remove fluoride. These processes include electrochemistry, coagulation, and hydrodynamics. These metals are used as sacrificial anodes, and as they corrode they produce metal hydroxide flocculants that capture and precipitate out fluoride. The major advantage with ECF is a reduction in sludge requiring management. A promising technology, but it has not been vetted at a production scale. The advantage of reduced sludge production may be offset by energy demands. Yes Treatment Works - Chemical Coagulation/Flocculation Groundwater is fed to a continuous flow reactor. Concentrated alkaline salt solution (magnesium, calcium aluminum) is added to promote precipitation of fluoride containing salts. Precipitate is captured by filtration or in settling basins. Aqueous effluent must be neutralized to an acceptable pH before release back to environment. Typically used in high concentration industrial effluents, and often low levels of fluoride remain in effluent after treatment. Yes EHS Support 2 of 3 Table 2 Remedial Technologies Focused Treatability Study Work Plan Badin Business Park - Badin, North Carolina Alcoa Corporation Technology Type Description Comments Retained Disposal Discharge to On -Site Evaporation Pond The impacted groundwater is collected from the sub -surface or storm sewer system by pumping wells, installing groundwater collection sumps, or diverting flow from the storm sewer. Water would be pumped to an on -site pond for evaporation. Fluoride would remain in solution or sequester in soil preventing migration. Large design considerations will have to be made regarding methods to prevent loss of containment from the pond during flood events. Yes Discharge to Sanitary Sewer System Groundwater is discharged to the sanitary sewer system where it will be conveyed to the POTW. The municipal wastewater treatment plant will remove fluoride before discharging treated process water. Will require that water discharged to the sanitary sewer system meet influent requirements dictated by the POTW. Yes Discharge to Outfall 012 Diversion of flow from NPDES Outfall 005 to NPDES Outfall 012 that contains a diffuser allowing for dispersion of contamination, thus avoiding high local concentrations. This technology does not reduce the toxicity, mobility, or volume of contamination. Yes Notes: ECF = Electrokinetic Coagulation/Flocculation NPDES = National Pollutant Discharge Elimination System POTW = publicly owned treatment works EHS �J� Support 3 of 3 Table 3 Remedial Alternatives Focused Treatability Study Work Plan Badin Business Park - Badin, North Carolina Alcoa Corporation Treatment Alternative Process Option Description Effectiveness Implementability Relative Cost Screening Comments TA-1: No Action No action is taken. Not Effective. Easily implementable. No Cost. Action does not meat the Remedial Action Objective of discharge concentrations <1.8 mg/L fluoride at Outfall 005. Action is not applicable and is included for comparative purposes only. TA-2: Containment Remove or abandon the existing storm sewer structures, removing the discharge pathway and containing fluoride -impacted groundwater within the subsurface. Effectively removes the risk of discharge exceedances at Outfall 005 as Outfall 005 will no longer be operable. Implementation may pose a challenge as the storm sewer is aged and the condition may present difficulties during abandonment/removal. Water will need to be managed during the abandonment/removal process. Stormwater produced at the Site will need to be managed at the surface and a new stormwater management system will need to be designed, installed, and permitted. Capital Costs: Medium to High O&M Costs: Low This technology will require that the storm sewer be fully removed or abandoned to ensure no incidental discharges occur due to preferential pathways provided by existing infrastructure. TA-3: In Situ Treatment Funnel and gate systems use cutoff walls to modify in -ground flow (funnel) towards multiple or a single reactive barrier (gate). This reactive barrier can be considered a small, packed bed reactor in which fluoride adsorbs to the surface of the packing (activated alumina, bone char, calcium oxide) during flow through the barrier. Treated flow can then be directed to the current sewer system for routing to NPDES Outfall 005. Effective in the short term. Long-term effectiveness is unknown and is heavily dependent on sorption capacity of the reactive barrier used. Fouling of barrier due to colloidal materials is a concern and will need to be further investigated if implemented. Efficacy will be dependent on a careful evaluation of the subsurface to minimize the potential for alternative flow paths. Detailed pre -design investigation likely required. Installation easily implementable. Likely to have minimal environmental impact after installation. Capital Costs: High O&M Costs: Low Treatment via reactive barriers is an attractive option given its potential for low cost and low impact. Allows for treatment at multiple places throughout the Site at a relatively low cost. TA-4: Ex Situ Treatment TA-4a: Spray Irrigation/Phytoremediation Contaminated groundwater is pumped and sprayed onto excess land. The water will evaporate, thereby sequestering fluoride into the unused soil. Potential for phytoremediation by organisms present in local environment. Fluoride is sequestered in soil for the short term but long-term effectiveness is unknown. Potential for fluoride to leach to groundwater and migrate to local watershed during storm events. Phytoremediation of fluoride would require additional studies to determine the effectiveness in local area. Likely not applicable given phytoremediation is highly advantageous for organic contaminants. Implementability is simple, as it consists of preparation of a planted area and irrigation system. Most implementability issues are associated with groundwater extraction system. Capital Cost: Medium O&M Costs: Low Difficult to limit transfer of fluoride to surrounding groundwater at sequestration site but if site with adequate protection from fluoride migration is identified, it could be a viable solution. TA-4b: Activated Alumina Sequestration The impacted groundwater is collected from the sub -surface or storm sewer system by pumping wells, the installation of groundwater collection sumps, or diverting flow from the storm sewer. Impacted groundwater is conveyed to an on -site Groundwater Treatment System. Treatment system will address water quality parameters prior to introducing the treated water to sorbent media beds, which will reduce the fluoride concentrations to below the Outfall 005 discharge limit. Treated water will be discharged via Outfall 005. The operation will produce byproducts, consumed media, and solids, which will require disposal. Immediately effective and continues to be effective with proper O&M of Groundwater Treatment System. Extensively demonstrated ability for fluoride removal at targeted Site concentrations, prior to sewer ingress and dilution. Easily scalable with treatment volume. Colloidal material in groundwater may cause faster deactivation of sorbent materials. Will require extensive testing to design necessary pre-treatment requirements to prevent fouling. Water treatment plant will require detailed design and factory fabrication with construction time frames between 6 and 9 months. Readily implementable. Sorbents are low cost and readily available. Does not require specially designed parts. Capital Costs: Medium. O&M Costs: Medium. A low-cost option for fluoride removal. Does not produce hazardous waste and has been demonstrated to be effective at targeted Site concentrations. Will require additional studies to determine the effects of colloidal substances. TA-4c: Bone Char Sequestration The impacted groundwater is collected from the sub -surface or storm sewer system by pumping wells, installing groundwater collection sumps, or diverting flow from the storm sewer. Impacted groundwater is conveyed to an on -site Groundwater Treatment System. Treatment system will address water quality parameters prior to introducing the treated water to bone char media beds, which will reduce the fluoride concentrations to below the Outfall 005 discharge limit. Treated water will be discharged via Outfall 005. The operation will produce byproducts (consumed media and solids) which will require disposal. Immediately effective and continues to be effective with proper O&M of Groundwater Treatment System. Extensively demonstrated ability for fluoride removal at targeted Site concentrations, prior to sewer ingress and dilution. Easily scalable with treatment volume. Colloidal material in groundwater may cause faster deactivation of sorbent materials. Will require extensive testing to design necessary pre-treatment requirements to prevent fouling. Water treatment plant will require detailed design and factory fabrication with construction time frames between 6 and 9 months. Readily implementable. Sorbents are low cost and readily available. Does not require specially designed parts. Capital Costs: Medium. O&M Costs: Medium. A low-cost option for fluoride removal. Does not produce hazardous waste and has been demonstrated to be effective at targeted Site concentrations. Will require additional studies to determine the effects of colloidal substances. TA-4d: Calcium Oxide Sequestration The impacted groundwater is collected from the sub -surface or storm sewer system by pumping wells, installing groundwater collection sumps, or diverting flow from the storm sewer. Impacted groundwater is conveyed to an on -site Groundwater Treatment System. Treatment system will address water quality parameters prior to introducing the process water to calcium oxide media beds, which will reduce the fluoride concentrations to below the Outfall 005 discharge limit. Process water will be discharged via Outfall 005. The operation will produce byproducts, consumed media, and solids, which will require disposal. Immediately effective and continues to be effective with proper O&M of Groundwater Treatment System. Extensively demonstrated ability for fluoride removal at targeted Site concentrations, prior to sewer ingress and dilution. Easily scalable with treatment volume. Colloidal material in groundwater may cause faster deactivation of sorbent materials. Will require extensive testing to design necessary pre-treatment requirements to prevent fouling. Water treatment plant will require detailed design and factory fabrication with construction time frames between 6 and 9 months. Readily implementable. Sorbents are low cost and readily available. Does not require specially designed parts. Capital Costs: Medium. O&M Costs: Medium. A low-cost option for fluoride removal. Does not produce hazardous waste and has been demonstrated to be effective at targeted Site concentrations. Will require additional studies to determine the effects of colloidal substances. TA-4e: Ion Exchange Resins System configuration will be similar to the conventional adsorption media system (as described in TA-4a through TA-4d) requiring pretreatment (solids removal) and pH control. Fluoride ions are removed from aqueous phase via an exchange mechanism with a commercially available exchange medium. Potential exchange mediums include specially designed resins containing synthetic organic materials that exchange groups are attached to. On -site or off -site regeneration of resin is conducted to remove fluoride and allow for reuse. Regeneration of resin produces a concentrated brine waste stream that is transported off -site for disposal. On -site regeneration would require the construction of additional treatment/management systems. Commonly used technology for removal of ionic species from process water. Scalable with volume but requires specially designed systems. Ion exchange systems are available commercially and plant design is similar to any flow through Groundwater Treatment System. On -site regeneration (given the remote location and absence of industrial sewer for concentrated waste stream) is not considered viable. Ion exchange is expensive and the need to use exchange beds will further increase costs. The high cost of resin relative to alumina makes reuse (regeneration) the only economic option. However the concerns over fouling of resin (especially with multiple uses) is considered a major constraint. Management of the concentrate waste stream is also a major constraint/cost. Capitals Costs: Medium O&M Costs: High Ion exchange presents a potentially efficacious solution but is more costly than lower cost sorptive media. Exact efficacy and operational costs will require further investigation. EHS �` Support 1 pf 2 Table 3 Remedial Alternatives Focused Treatability Study Work Plan Badin Business Park - Badin, North Carolina Alcoa Corporation Treatment Alternative Process Option Description Effectiveness Implementability Relative Cost Screening Comments TA-4: Ex Situ Treatment TA-4f: Reverse Osmosis System configuration will be similar to the conventional adsorption media system requiring pretreatment (solids removal) and pH control. Extracted process water is exposed to a high-pressure gradient over a specially designed membrane to generate a permeate and brine stream. This results in selective transfer of species across the membrane concentration ions within the brine stream. Treated water is released to the environment. In the process of treating the water, large amounts of brine (20% to 10% of the initial flow) are produced that require management. Typically this is disposed of in the sewer and/or transported off -site. RO systems can easilybecome mechanicallyor biologically fouled. This requires major solids Y g Y q 1 pretreatment (flocculants, polymers, sand filters), sometimes multi -stage filtration, pH adjustment and scale inhibitors (to address hardness and scale issues), and the extensive use of biocides. RO is extensively used for water treatment applications. Requires specially designed membranes to be effective and a fouling behavior study will be required to determine effectiveness over time. Generally used for water containing fluoride concentrations much higher than was found on -site. A core challenge with fluoride is the low molecular weight of the ion and its strong electro-negative charge. While removal efficiencies are higher for chloride, sulfate and fluoride removal efficiencies are typically around 50%. Where removal efficiencies are low it is common for ROpermeate to bepassed through ion g exchange resin to facilitate further lowering of fluoride concentrations. Implementable but will require extensive safety and process design considerations. Design and construction of complex plant would likely be more than 12 months and extensive bench -scale testing (an additional 6 months) will have to be conducted to appropriate design pretreatment requirements and aid in membrane selection. High pressure membranes (able to facilitate more efficient removal of low molecular ions) can be selected but these are more easily fouled. Major challenge will be in development of an effective means for brine management. g Pwill Capital Cost: High O&M Costs: High. Costs with off -site transport and disposal of brine and supplemental treatment of fluoride ^ ith ion exchange resin make costs very high. Despite high cost and fouling potential, it is known to be an effective method for fluoride removal. TA-4g: Electrokinetic Coagulation Flocculation (ECF) ECF is an adaptation of traditional coagulation and flocculation techniques. Metals, such as iron and aluminum, are added to the process water and introduced to an electrical current in place of chemical coagulants and flocculants. The process makes use of three separate processes to remove fluoride. These processes include electrochemistry, coagulation, and hydrodynamics. These metals are used as sacrificial anodes, and as they corrode they produce metal hydroxide flocculants that capture and precipitate out fluoride. The major advantage of ECF is a reduction of sludge requiring management. Shown to be a highly effective solution at laboratory scale. No known implementation at remedial scale. Hard to implement. Will require novel plant design and construction of pilot- scale systems to the real -world effectiveness of removal. Extensive process monitoring would be required. Capital Costs: High O&M Costs: High Efficacy is unknown at remediation scale. Requires further process development before implementation is viable. High costs associated with research and electricity demands. TA-4h: Chemical Coagulation Flocculation Groundwater is fed to a continuous flow reactor. Concentrated alkaline salt solution (magnesium, calcium, aluminum)is added topromote precipitation of fluoride containingsalts. Precipitate is captured P p p P via filtration. Process can also take place in settling basins. Aqueous effluent must be neutralized to an acceptable pH before release back to environment. Demonstrated to be highly effective at removal of high fluoride concentration in the semi -conductor industry.Efficacyof treatment to required criteria is limited. Further downstream treatment likely required. Hard to implement. Requires construction of chemical treatmentplant with P q appropriate storage of waste products. Capital Costs: High O&M Costs: High Hard to implement. Would require construction and P q maintenance of a chemical plant. TA-5: Removal/Disposal TA-5a: Evaporation Pond The impacted groundwater is collected from the sub -surface or storm sewer system by pumping wells, installing groundwater collection sumps, or diverting flow from the storm sewer. Water would be pumped to an on -site pond for evaporation. Fluoride would remain in solution or sequester in soil. Efficacy is dependent on the ability to successfully intercept the impacted groundwater either prior to or in the existing stormwater system. Fluoride will become concentrated in on -site evaporation pond, effectively isolating it. This would require limiting contact with the local watershed including during flooding events. The efficacy is also dependent on seasonal influences and storm events. Winter months will reduce or stall evaporation. Storm events will recharge the pond and delay sequestration. The construction of an evaporation pond would not be difficult. However, an investigation into the required volume for the pond may prove that the available space limits the implementability of this option. Capital Cost: Medium O&M Costs: Low Will cause further concentration of fluoride, that if not adequately protected or exposed to a storm event, could migrate to the watershed causing further damage. TA-Sb: Sanitary Sewer The impacted groundwater is collected from the sub -surface or storm sewer system by groundwater collection sumps, or diverting flow from the storm sewer. Extracted groundwater is discharged to the sanitarysewer system where it will be conveyed to the municipal wastewater treatmentplant. The Y Y P municipal wastewater treatment plant will remove fluoride before discharging treated process water. Will require extensive reconstruction of on -site water infrastructure. Necessary to ensure that current water processing infrastructure can handle proposed fluxes of fluoride. Efficacy is dependent on the ability to successfully intercept the impactedgroundwater eitherprior to or in the existingand P stormwater system. Prevents migration of fluoride to environment. Implementation of this technology will require municipal approval, permitting, regular testing to ensure compliance with the POTW's discharge limits. g g P Some pretreatment may be required for other water quality parameters, even if fluoride is within acceptable discharge limits. Capital Cost: High O&M Costs: Medium Treatment is effective but requires high cost, municipal approval, and further feasibility evaluation. TA-6: Discharge to 0012 Diversion of flow from NPDES Outfall 005 to NPDES Outfall 012 that contains a diffuser allowing for dispersion of contamination, thus avoiding high local concentrations. Efficacy is dependent on the ability to successfully intercept the impacted groundwater either prior to or in the existing stormwater system. Use of a diffuser will allow for Outfall 012 to receive the additional flow from Outfall 005 and still maintain average concentrations below the discharge limit for Outfall 012. The volumetric flow rate at Outfall 012 is limited to 42 gallons per minute, potentially limiting the quality of water that may be diverted to Outfall 012. Implementability is simple in regards to construction of this option, however, due to the diversion of fluoride to Badin Lake and the associated optics, this alternative will be difficult to implement. Capital Cost: Medium O&M Costs: Low While feasible and fully compliant, it is recognized that there are potential optic issues with the pursuit of this technology. Notes: ECF = Electrokinetic Coagulation/Flocculation mg/L = milligrams per liter NPDES = National Pollutant Discharge Elimination System O&M = operation and maintenance POTW = publicly owned treatment works RO = reverse osmosis TA = treatment alternative EHS Support 2 pf 2 Table 4 Remedial Alternative Data Gaps Focused Treatability Study Work Plan Badin Business Park - Badin, North Carolina Alcoa Corporation Treatment Alternative Part of FTSWP Data Needed to Evaluate Alternatives TA-1: No Action N/A • None TA-2: Containment ✓ • In depth groundwater hydrology study. • Topographic survey and model of stormwater collection and conveyance options. TA-3: In Situ Treatment ✓ • Estimates of groundwater mass flux to determine flouride mass estimates to be treated over time. • Understanding of on -site asorption rates for determining required media volumes • In depth hydrology study to locate prefferential pathways and ensure they are intercepted by the PRB. ✓ TA-4: Ex Situ Treatment TA-4a: Spray lrrigation/Phytoremediation ✓ • Estimates of groundwater mass flux to determine the sizing of spray irrigation area. • Pilot testing of activated alumina treatment to determine Site -specific reaction kinetics. • Bench -scale testing/data on flouride resistant flora species. • Sump pilot testing to determine if flouride-impacted groundwater can be captured prior to sewer ingress. ✓ ✓ TA-4b: Activated Alumina Sequestration ✓ • Estimates of groundwater mass flux to determine the sizing of media beds/vessels. • Analyisis of water qaulity parameters to determine the need for pretreatment. • Pilot testing of activated alumina treatment to determine Site -specific reaction kinetics and media consumption rates. • Sump pilot testing to determine if flouride-impacted groundwater can be captured prior to sewer ingress. • Evaluation of disposal options for consumed media. ✓ ✓ ✓ ✓ TA-4c: Bone Char Sequestration ✓ • Estimates of groundwater mass flux to determine the sizing of media beds/vessels. • Analyisis of water qaulity parameters to determine the need for pretreatment. • Potential bench -scale testing of bone char treatment to determine Site -specific reaction kinetics and media consumption rates. • Sump pilot testing to determine if flouride-impacted groundwater can be captured prior to sewer ingress. • Evaluation of disposal options for consumed media. ✓ ✓ ✓ TA-4d: Calcium Oxide Sequestration ✓ • Estimates of groundwater mass flux to determine the sizing of media beds/vessels. • Analyisis of water qaulity parameters to determine the need for pretreatment. • Potential bench -scale testing of calcium oxide treatment to determine Site -specific reaction kinetics and media consumption rates. • Sump pilot testing to determine if fluoride -impacted groundwater can be captured prior to sewer ingress. • Evaluation of disposal options for consumed media. ✓ ✓ ✓ TA-4e: Ion Exchange Resins ✓ • Estimates of groundwater mass flux to determine the sizing of media vessels. • Analyisis of water qaulity parameters to determine the need for pretreatment and perform treatment modelling. • Determine chemical demands for regeneration of resins. • Sump pilot testing to determine if flouride-impacted groundwater can be captured prior to sewer ingress. • Evaluation of disposal options for consumed media. ✓ ✓ ✓ TA-4f: Reverse Osmosis ✓ • Estimates of groundwater mass flux to determine the sizing of the treatment train. • Analyisis of water quality parameters to determine the need for pretreatment and to perform treatment modelling. • Sump pilot testing to determine if flouride0impacted groundwater can be captured prior to sewer ingress. • Evaluation of disposal options for brine. ✓ ✓ ✓ TA 4g. Electrokinetic Coagulation Flocculation (ECF) ✓ • Estimates of groundwater mass flux to determine the sizing of the treatment train. • Analyisis of water qaulity parameters to determine the need for pretreatment. • Potential bench scale testing of ECF treatment to determine Site -specific reaction kinetics and estimated sludge production rates. • Evaluation of electricity demands of a full-scale ECF system. • Sump pilot testing to determine if flouride-impacted groundwater can be captured prior to sewer ingress. • Evaluation of disposal options for sludge. ✓ ✓ ✓ TA-4h: Chemical Coagulation Flocculation ✓ • Estimates of groundwater mass flux to determine the sizing of the treatment train. • Analyisis of water qaulity parameters to determine the need for pretreatment. • Potential bench -scale testing of coagulation/flocculation treatment to determine Site -specific reaction kinetics and estimated sludge production rates. • Sump pilot testing to determine if flouride-impacted groundwater can be captured prior to sewer ingress. • Evaluation of disposal options for sludge. ✓ ✓ V EHS Support' 1 of 2 Table 4 Remedial Alternative Data Gaps Focused Treatability Study Work Plan Badin Business Park - Badin, North Carolina Alcoa Corporation Treatment Alternative Part of FTSWP Data Needed to Evaluate Alternatives TA-5: Removal/Disposal TA-5a: Evaporation Pond ✓ • Estimates of groundwater mass flux to determine what size evaporation pond would be required. • Evaluaton of flood conditions and patterns to use in the design of an evaporation pond that will prevent the release of stored flouride. • Evaluation of permitting required to construct and operate the evaporation pond. TA-5b: Sanitary Sewer ✓ • Estimates of groundwater mass flux to determine what flow contributions will be made to the sanitary sewer. • Analyisis of water qaulity parameters to determine the need for pretreatment, based on POTW discharge limits. • Identify nearest potenial sanitary sewer discharge point. ✓ TA-6: Discharge Evaluation of pumping effects at Outfall 005. Notes: Bench scale testing will be performed in coordination with material vendors. ECF = electrokinetic coagulation flocculation FTSWP = Focused Treatability Study Work Plan N/A = not applicable POTW = publicly owned treatment works PRB = permeable reactive barrier TA = treatment alternative EHS Support 2 of 2 Focused Treatability Study Work Plan — Badin Business Park Appendix A Hydrogeological Conceptual Site Model Update EHS Support LLC Hydrogeological Conceptual Site Model Update Badin Business Park Badin, North Carolina Prepared for: Alcoa Corporation Prepared by: EHS Support December 2022 Hydrogeological Conceptual Site Model Update — Badin Business Park Table of Contents Table of Contents 1 Introduction 1 1.1 Key Findings 1 2 Background 4 2.1 Operational History 5 2.2 Sources of Contamination and Constituents of Interest 5 2.3 Regulatory Background — National Pollutant Discharge Elimination System 5 2.4 Regulatory Background — Resource Conservation and Recovery Act 6 2.5 Previous Investigations and Remedial Activities 8 2.5.1 Former Main Plant Area 8 2.5.2 Alcoa Badin Landfill — SWMU 2 9 2.5.3 Old Brick Landfill — SWMU 3 10 3 Investigation Activities in 2022 12 4 Regional Setting 17 4.1 Regional Geology 17 4.2 Regional Hydrogeology 20 5 Site Geology 22 5.1 Areas of Engineered Cut and Fill 23 5.2 Areas of Excavated Soils 25 5.3 Areas of Fill 28 6 Site Hydrogeology 29 6.1 Monitoring Well and Piezometer Network 29 6.2 Hydraulic Conductivity 30 6.3 Vertical Groundwater Gradients 35 6.4 Historical Groundwater Elevation Data 36 6.5 2022 Groundwater Elevation Data 39 6.6 Seepage Velocity 42 7 Geochemistry 44 7.1 Nature and Extent of Groundwater Fluoride and Cyanide Impacts 44 7.2 Surface Water 51 7.2.1 Badin Lake 51 7.2.2 Little Mountain Creek 53 8 Stormwater System 54 8.1 Outfa 11005 55 8.2 Stormwater System — Groundwater Interaction 58 EHS Support LLC Hydrogeological Conceptual Site Model Update — Badin Business Park Table of Contents 8.3 Track Down Analytical Data 60 9 ABL-Specific Hydrogeology and Efficacy of ABL Corrective Measures 64 9.1 Efficacy of ABL Corrective Measures 66 9.2 Recovery Volumes 66 9.3 Electrical Conductivity Surveys 68 9.4 Source of COIs 70 10 Conclusions 72 11 References 74 EHS Support LLC ii Hydrogeological Conceptual Site Model Update — Badin Business Park Table of Contents List of Tables Table 3-1 Table 3-2 Table 6-1 Table 6-2 Soil Physical Properties Summary Aquifer Testing Results Hydraulic Conductivity Data Summary Seepage Velocity Calculation Parameters List of Figures Figure 1-1 Figure 1-2 Figure 2-1 Figure 2-2 Figure 3-1 Figure 4-1 Figure 4-2 Figure 4-3 Figure 4-4 Figure 4-5 Figure 5-1 Figure 5-2 Figure 5-3 Figure 5-4 Figure 5-5 Figure 5-6 Figure 6-1 Figure 6-2 Figure 6-3 Figure 6-4 Figure 6-5 Figure 6-6 Figure 6-7 Figure 7-1 Figure 7-2 Figure 7-3 Figure 7-4 Figure 7-5 Figure 8-1 Figure 8-2 Figure 8-3 Figure 8-4 Figure 8-5 Generalized Appalachian Piedmont Hydrogeological Conceptualization Elements of the Site Hydrogeological Conceptualization Site Layout Key NPDES Outfall Locations 2022 Investigation Locations Regional Geographical and Geological Overview Regional Geology and Geologic Structure Orientations Generalized Weathering Profile and Nomenclature of Foliated Metasedimentary Rocks from the Piedmont Physiographic Province Examples of Native Soils Encountered at the Facility Typical Rock Weathering Profile Conceptual Effect of Facility Development on the Groundwater Flow System December 2021 Photo of PWR Outcropping Along the Shore of Badin Lake Adjacent to the Former Main Plant Areas of Engineered Cut and Fill Cross -Section from Badin Lake to Little Mountain Creek Crossing the Former Main Plant and ABL Depth to PWR or Fractured Rock PWR and Rock Bedding Strike and Dip Measured in 2022 Groundwater Seepage in Test Pit Walls Completed in PWR 2010-2012 Transducer Study Results from the ABL Locations of 2011-2012 Transducer Study Wells 2011-2012 Transducer Study — Soil and Fill Wells 2011-2012 Transducer Study — PWR wells PWR Groundwater Elevations — September 8, 2022 PWR Groundwater Elevations — October 19, 2022 Fluoride Concentration Contours in Groundwater (2011) Available Cyanide Concentration Contours in Groundwater (2011) pH Contours for Groundwater (2011) pH Dependence of Fluoride Mineral Solubility 2011 and 2012 Badin Lake Surface Water Samples Stormwater System Fluoride Concentrations Measured at Outfall 005 and MH 2.050 During December 2019 Sampling Event Fluoride Compliance at Outfall 005 Fluoride Compliance 2018 Through January 2022 at Outfall 005 PWR Elevation Compared to Storm and Sanitary Pipe Invert Elevations EHS Support LLC iii Hydrogeological Conceptual Site Model Update — Badin Business Park Table of Contents Figure 8-6 Figure 8-7 Figure 8-8 Figure 9-1 Figure 9-2 Figure 9-3 Figure 9-4 Figure 9-5 Figure 9-6 2019 Fluoride and Cyanide Track Down Study Results 2021 Fluoride and Cyanide Track Down Study Results Conceptual Summary of Impacts Entering the Outfall 005 Stormwater Conveyance System ABL Cross -Section ABL Slurry Wall and Collection Trench Configuration ABL Collection Trench Recovery Volumes Compared to Daily Precipitation Totals ABL Collection Trench Recovery Volumes Compared to a 30-Day Running Average of Precipitation Totals Initial (Fall 2018) Electromagnetic Conductivity Survey Results Fall 2022 Electromagnetic Conductivity Survey Results List of Attachments Attachment A 2022 Investigation Boring Logs Attachment B 2022 Monitoring Well Survey and Construction Details Attachment C 2022 Soil Physical Properties Data Attachment D 2022 Aquifer Testing Calculations Attachment E 2022 Groundwater Elevation Measurements Attachment F 2022 Field Parameter and Analytical Data Attachment G 2019 to 2021 Fluoride and Cyanide Track Down Analytical Results EHS Support LLC iv Hydrogeological Conceptual Site Model Update — Badin Business Park Acronyms Acronyms ABL Alcoa Badin Landfill AOC area of concern API American Petroleum Institute CEC Civil Environmental Consultants cm/sec centimeters per second CMS Corrective Measures Study COI constituent of interest CSM Conceptual Site Model EM electromagnetic GWB Geochemists' Workbench HCSM Hydrogeological Conceptual Site Model HDPE high -density polyethylene HWR hard weathered rock mg/L milligrams per liter MH manhole mL/min milliliters per minute mS/m milliSiemens per meter NAVD88 North American Vertical Datum 1988 NCAC North Carolina Administrative Code NCDEQ North Carolina Department of Environmental Quality NCDENR North Carolina Department of Environment and Natural Resources NCGS North Carolina Geological Survey NPDES National Pollutant Discharge Elimination System OBL Old Brick Landfill ORP oxidation-reduction potential PAH polycyclic aromatic hydrocarbons PCB polychlorinated biphenyl POTW publicly owned treatment works PVC polyvinyl chloride PWR partially weathered rock RCRA Resource Conservation and Recovery Act RFA RCRA Facility Assessment RFI RCRA Facility Investigation SPL spent potliner SWMU solid waste management unit SWR soft weathered rock TCE trichloroethene EHS Support LLC v Hydrogeological Conceptual Site Model Update — Badin Business Park Acronyms USEPA USGS United States Environmental Protection Agency United States Geological Survey Trademarks, trade names, company, or product names referenced herein are used for identification purposes only and are the property of their respective owners. EHS Support LLC vi Hydrogeological Conceptual Site Model Update — Badin Business Park Executive Summary Executive Summary The revised hydrogeological conceptual model for the Badin Business Park presented in this document is based on a synthesis of historical information and studies along with data from field studies performed as recently as 2022. The primary finding is that groundwater at the former Main Plant is recharged from precipitation infiltrating into partially weathered rock on the hillside to the west, and from Badin Lake to the east. Groundwater travels through the partially weathered rock unit to ultimately discharge primarily on the floodplain of Little Mountain Creek. Whereas other soil and fill units exist, they are limited in extent and capacity to transmit groundwater over broad areas. Plume geometry at the former Main Plant is constrained by the distribution of native soil, fill derived from native soil, and fill derived from a mixture of native soils and anthropogenic debris that includes industrial materials. The location and geometry of the plume has remained stable to decreasing over the time between the most recent Site -wide investigations. Groundwater migration out of these fill areas is limited by the hydraulic properties of the surrounding geologic units. Geochemical attenuation of constituents of interest occurs through mixing with clean water from Badin Lake that is recharging the partially weathered rock groundwater system, and through mineralization reactions that occur due to a large pH gradient. The aged stormwater conveyance network contains discontinuities such that groundwater enters the portion of the Outfall 005 stormwater system in localized areas where pipes intersect the partially weathered rock. This water ultimately discharges at Outfall 005 and results in periodic fluoride exceedances above the National Pollutant Discharge Elimination System (NPDES) discharge limit criteria. Remediation measures implemented at the toe of the Alcoa/Badin municipal landfill are demonstrated to be effective at capturing impacted groundwater and preventing migration of constituents of interest to Little Mountain Creek. Ongoing data collection from this area during 2023 will be used to update and further validate this hydrogeological conceptual model in future submissions. EHS Support LLC vii Hydrogeological Conceptual Site Model Update — Badin Business Park Introduction 1 Introduction This revised Hydrogeological Conceptual Site Model (HCSM) Report (Report) has been prepared for Badin Business Park LLC, a subsidiary of Alcoa Corporation (Alcoa). The Badin Business Park Facility (Facility or Site), formerly known as the Badin Works Facility and associated properties, consists of the former Main Plant, Alcoa Badin Landfill (ABL), and Old Brick Landfill (OBL). The Facility is located at 293 Highway 740 in Badin, Stanly County, North Carolina. This report has been developed out of a need to update the understanding of conditions at the Facility and to guide remedial actions. It is based on a synthesis of historical information and studies along with data from field studies performed as recently as 2022. This report provides an updated assessment of the hydrogeology, the interaction between groundwater and surface water, and contaminant attenuation across the former Main Plant and ABL. The results and conclusions of this report include a summary of additional works completed during 2022 to address identified data gaps in order to meet the stated objective. The 2022 data are supplemented with historical stormwater sampling results; historical Facility reports and data; United States Geologic Survey (USGS) and North Carolina Geological Survey (NCGS) maps, publications, and geospatial data products; peer -reviewed research; re-evaluation of Site -related well lithology, water level monitoring, and laboratory analytical data; and geospatial data products produced from these data sources. Furthermore, as part of this scope of work for the supplemental investigations, reinterpretation of historical investigation data through a review of published literature was used to update the HCSM and align it with recognized key concepts of the hydrogeology and flow systems pertinent to Piedmont geology, including the Heath Le Grande Model (LeGrand, 1967, 2004). This required a greater emphasis (consistent with the LeGrand model) on the physical properties and flow within the partially weathered rock (PWR), which is recognized as the primary geologic unit controlling groundwater flow and flux in this type of geologic setting. The remainder of this Report is structured as follows: • Introduction and Key Findings (Section 1) • Background (Section 2) • Investigation Activities (Section 3) • Regional Setting (Section 4) • Site Geology (Section 5) • Site Hydrogeology (Section 6) • Geochemistry (Section 7) • Stormwater System (Section 8) • ABL-Specific Hydrogeology and Efficacy of ABL Corrective Measures (Section 9) • Conclusions (Section 10) • References (Section 11) 1.1 Key Findings This report provides an update to the understanding of the HCSM. Prior to Facility development, groundwater flowed according to natural geologic controls typical of the North Carolina Piedmont (Figure 1-1). A key difference between the Facility and natural flow systems is that excavation for development removed native soils over a large portion of the former Main Plant, and Badin Lake was EHS Support LLC 1 Hydrogeological Conceptual Site Model Update — Badin Business Park Introduction established as an artificial reservoir that provides a source of recharge to groundwater at the Facility (Figure 1-2). Recharge Groundwater confined in partially weathered rock Groundwater potential head Precipitation recharges groundwater Rock structures and fabric can control groundwater flow direction Groundwater discharges to valleys Figure 1-1 Generalized Appalachian Piedmont Hydrogeological Conceptualization Recharge Groundwater confined in partially weathered or fractured rock Dis Badin Works Hydrogeology Conceptualization Rock structures and fabric direct groundwater toward ABL and Little Mountain Creek Badin Lake provides recharge Figure 1-2 Elements of the Site Hydrogeological Conceptualization EHS Support LLC 2 Hydrogeological Conceptual Site Model Update — Badin Business Park Introduction Additional key findings of the refined HCSM and supporting data collected in 2022 are summarized in the following bullet points. • Geologic units at the Facility are PWR including fractured rock, saprolite and residual soil, and fill. Fill is either composed of native soils or is a mixture of native soil and anthropogenic debris that includes industrial materials. • Groundwater occurs in PWR (including fractured rock) and anthropogenic fill. o Saprolite and residual soil have very low hydraulic conductivity; no monitoring wells are exclusively screened in these units. Monitoring wells that include saprolite or residual soil in the screen interval only produce water if the screen interval also intersects fill or PWR. o Fill has highly variable hydraulic conductivity depending on the proportion of native soils. A higher proportion of fill made up of native soils equates to lower hydraulic conductivity. o PWR has moderate hydraulic conductivity and is locally very conductive due to fracturing. Evidence for high local permeability is a significant loss of drilling fluid circulation during drilling of MW-20A (Geraghty and Miller, 1995). • PWR and fractured rock are the only units that are continuous across the former Main Plant and ABL. Areas of fill are limited to isolated ravines or drainages that were filled during Facility development and operations, consequently: o A network of PWR wells is critical for understanding groundwater fate and transport. o Wells screened in fill are only useful for understanding how isolated areas of fill interact with the broader PWR groundwater system. • Based on groundwater elevation data, groundwater in PWR at the former Main Plant is recharged by Badin Lake to the east and a flow system originating on the hillside to the west. The two flow systems converge near the shoreline of Badin Lake and flow southward toward the ABL. Groundwater ultimately discharges primarily to the floodplain of Little Mountain Creek, as evidenced by strong upward vertical groundwater gradients in this location. • Mixing between Badin Lake water and groundwater leads to substantially lower constituent concentrations due to mixing and geochemical attenuation across a steep pH gradient at the mixing zone. • Groundwater flow directions in PWR are influenced by the regional trend of geologic structures and subsurface stormwater infrastructure, both of which trend northeast -southwest in the direction from Badin Lake toward the floodplain of Little Mountain Creek. • Limited sections of storm sewer piping intersect the PWR and groundwater contained in this unit and the groundwater from this system has been shown to enter stormwater sewers. Fluoride enters the storm sewer system where the pipe intersects PWR or fractured rock. This water ultimately exits at Outfall 005. The introduction of clean water to the storm sewer could bring the system into compliance. • The storm sewer systems were established in natural materials and the use of bedding materials was limited before pipe placement. The intermittent distribution of bedding materials (sand, gravel, etc.) limits the potential for preferential flow of groundwater along these trench lines. Groundwater gauging data does not show any distortions in groundwater equipotential (low groundwater elevations proximal to drain infrastructure), which would be indicative of preferential flow along bedding materials. • A groundwater collection trench at the toe of the ABL has gone through several upgrades and is effective at mitigating groundwater impacts to the floodplain of Little Mountain Creek. The efficacy of the interceptor trench is monitored by annual geophysical surveys of subsurface conductivity, which indicates a decreasing footprint of impacted groundwater. EHS Support LLC 3 Hydrogeological Conceptual Site Model Update — Badin Business Park Background 2 Background Areas where past operations occurred include the 123-acre former Main Plant, and industrial materials were disposed of in the 14-acre ABL located 500 feet southwest of the former Main Plant, and the 3- acre OBL located 0.75 miles northeast of the former Main Plant (Figure 2-1). The former Main Plant was built on an area of engineered cut and fill that was leveled to an elevation of approximately 520 feet relative to the North American Vertical Datum 1988 (NAVD88) (Figure 2-1). The elevation increases immediately east of the Facility to over 600 feet NAVD88. The former Main Plant is bordered by Badin Lake to the east, which is a man-made flooded valley constructed in the early 1900s for generating hydroelectric power. The average surface water elevation of Badin Lake is approximately 509 feet (NAVD88) based on data from the Cube HydroTM Carolinas websitel (corrected for obvious outliers). The ground surface elevation decreases south of the former Facility and ABL to less than 470 feet NAVD88 on the floodplain of Little Mountain Creek. Note: Yellow dashed lines indicate ground elevation in units of feet (North American Vertical Datum 1988 [NAVD88]). Figure 2-1 Site Layout 1 Cube Hydro Carolinas — Cube Hydro Carolinas (cubecarolinas.com) EHS Support LLC 4 Hydrogeological Conceptual Site Model Update — Badin Business Park Background 2.1 Operational History The Facility operated from 1916 through 2007 after Badin Lake was constructed in the early 1900s for hydroelectric electricity generation. In the mid-1960s, potlines were redesigned and expanded at the Facility. Production output was lowered in August 2002, and only anodes and high -purity aluminum were manufactured until production ceased in 2007. The Facility was permanently closed in 2010. Several buildings have been demolished since 2012, and the former Facility has been redeveloped into a business park for manufacturing companies. 2.2 Sources of Contamination and Constituents of Interest The Facility employed the Hall-Heroult industrial aluminum smelting process, which involved high -power electrolytic extraction of aluminum from a cryolite solution containing sodium, alumina, and fluoride. The process was conducted in brick -lined steel pots, with an inner lining of carbon -based cathode manufactured on -Site from anthracite and coal tar pitch. Carbon -based anodes, also manufactured on - site, were lowered into the cryolite solution and an electric current was applied. Spent potliner (SPL) was periodically jackhammered out of the pots before reusing the steel pot casing. The first cut of the SPL consists of the carbon cathode lining and is designated as code 'K088' by the United States Environmental Protection Agency (USEPA). Fluoride and cyanide, the primary constituents of interest (COIs) in soil and groundwater, are associated with past production and K088 disposal practices. The second cut of the SPL includes the steel shell, insulating brick, and metallic aluminum and is excluded from the K088 designation. Regulatory Background — National Pollutant Discharge Elimination System Surface water discharges from the Facility are regulated through the NPDES program. Eleven outfalls are permitted to discharge to either Badin Lake or an unnamed tributary to Little Mountain Creek. The location of the outfalls and associated storm sewer piping are shown on Figure 2-2. While all locations are permitted for stormwater discharges associated with an industrial activity, Outfalls 005, 011, 012, 013, and 019 are also permitted for non -process wastewater associated with groundwater infiltration. Priority pollutant sampling is conducted at outfalls under NPDES permit NC0004308, and is discussed in the context of Outfall 005, where periodic exceedances of the fluoride discharge limit occur (Section 8). To address the issues, Badin Business Park applied to the North Carolina Division of Water Resources for a special order by consent on July 2, 2018. The special order by consent specified the need to design and construct an upgraded stormwater piping system in an effort to meet discharge limits stipulated under the NPDES permit. Construction of the shallow stormwater system and complimentary efforts to identify and mitigate the cause of the Outfall 005 fluoride exceedances are discussed in Section 8. EHS Support LLC 5 Hydrogeological Conceptual Site Model Update — Badin Business Park Background Note: Red, yellow, blue, green, and teal colors indicate sections (piping) of the storm sewer system directed to specific outfalls. The black lines indicate the approximate boundaries of the former Main Plant and the Alcoa Badin Landfill. Figure 2-2 Key NPDES Outfall Locations 2.4 Regulatory Background — Resource Conservation and Recovery Act In March 1990, Alcoa filed a Resource Conservation and Recovery Act (RCRA) Part B permit application with the USEPA for the on -site storage of hazardous wastes (specifically K088) for greater than 90 days. The permit application triggered a RCRA Facility Assessment (RFA) that was performed by USEPA Region IV (A.T. Kearny Inc, 1990), and identified 34 solid waste management units (SWMUs) and 2 areas of concern (ADCs). Corrective actions to be conducted were outlined in Alcoa's RCRA Part B permit, which EHS Support LLC 6 Hydrogeological Conceptual Site Model Update — Badin Business Park Background was issued by what is currently the North Carolina Department of Environmental Quality (NCDEQ) in cooperation with USEPA Region IV in March 1992. The first step in the corrective action process was confirmation sampling at 7 SWMUs to verify if a release had occurred. Alcoa identified 12 additional SWMUs after completing the RFA and voluntarily completed interim measures at several SWMUs. Based on the outcome of these activities, Alcoa completed a RCRA Facility Investigation (RFI) report (MFG Inc, 2001). The RFI findings immediately supported a No Further Action status by the North Carolina Department of Environment and Natural Resources (NCDENR) for 22 of the Facility SWMUs and AOCs. A No Further Action status was granted to 5 additional SWMUs following confirmatory sampling, while 18 units were to be further investigated under the RFI process. Interim measures and remedial actions conducted to date have led to a No Further Action or No Further Investigation status assigned to all or a portion of 43 SWMUs. The RFI identified groundwater in three areas of the Facility needing further actions — the ABL (SWMU 2), the OBL (SWMU 3), and groundwater in the northern portion of the former Main Plant (Figure 1-1) (MFG Inc, 2001). Between 2009 and 2013, Alcoa completed a Corrective Measures Study (CMS) to update the Geologic Conceptual Site Model (CSM) and the HCSM, as well as to establish the remedial action objectives. The CMS was completed in five phases that are documented in four reports (Environeering, 2010, 2012a, 2012b, 2013). The CMS (Environeering, 2010, 2012a, 2012b, 2013) documented that cover system upgrades have resulted in beneficial effects to groundwater concentrations at the OBL. The earlier RFI results demonstrated that there are no COls in soils adjacent to the OBL and only cyanide exceeded groundwater screening values, whereas fluoride was not detected above North Carolina groundwater criteria (i.e., Title 15A of the North Carolina Administrative Code [NCAC] Subchapter 2L standards or NC 2L standards) in groundwater samples collected from any OBL wells during the CMS Phase 3 engineering data collection work (Environeering, 2012b). Available cyanide was detected above NC 2L standards in a sample from one OBL well during the CMS Phase 3 engineering data collection; in subsequent sampling events it was not detected above the NC 2L standards. The CMS (Environeering, 2010, 2012a, 2012b, 2013) documented that COls in former Main Plant soils were addressed by interim measure work and soil removal activities. Available cyanide, fluoride, and trichloroethane were detected above NC 2L standards in the former Main Plant groundwater. Arsenic was eliminated from Facility COI list due to high natural background concentrations in the area, and the only other groundwater COI identified during the earlier RFI work was below NC 2L standards during the CMS work. As part of the January 23, 2017, correspondence concerning the review of Phases 4 and 5 of the CMS (NCDEQ, 2017), NCDEQ requested additional groundwater sampling for trichloroethene (TCE) from newly installed monitoring well MW-110. To address the objective, groundwater samples were collected from four monitoring wells (MW-4, MW-9, MW-16, and MW-110) (Environeering, 2018a). Sampling results for all four wells were above NC 2L groundwater standard of 0.003 milligrams per liter (mg/L). However, concentrations of TCE in the three wells sampled during the CMS had decreased, indicating that the constituent plume is not expanding. Also, TCE results for MW-110 were only slightly above the NC 2L groundwater standard at a concentration of 0.0065 mg/L. At the ABL, the RFI documented that no COls were present in soil above conservative risk -based screening levels, and only total cyanide exceeded screening levels in groundwater from a single well downgradient of the landfill. The CMS work (Environeering, 2010, 2012a, 2012b, 2013) documented the EHS Support LLC 7 Hydrogeological Conceptual Site Model Update — Badin Business Park Background beneficial effects of ABL cover system upgrades; available cyanide and fluoride were below NC 2L standards in all sentinel groundwater monitoring wells. As part of the January 23, 2017 correspondence concerning the review of Phases 4 and 5 of the CMS (NCDEQ, 2017), NCDEQ requested an additional investigation at the ABL. A work plan was prepared that outlined four tasks to address the requested items. The work plan was submitted in revised form on April 2, 2018 (Environeering, 2018b), following conditional approval of the approach on January 31, 2018. The several reports detailing the outcome of the investigative activities are summarized in a letter provided to NCDEQ dated December 22, 2021. The four tasks outlined in the 2018 work plan are as follows: • Conduct a surface water assessment involving sample collection from Little Mountain Creek and the eastern drainage ditch on the Little Mountain Creek floodplain to assess concentrations of polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs) in sediment, and PCBs, PAHs, fluoride, and cyanide in surface water. These results are discussed in Section 7.2. • Evaluate the hydrological conditions to determine contributions of groundwater to the eastern drainage ditch and the efficacy of the groundwater collection trench system. The results of this evaluation are discussed in Section 7.2. • Establish a geophysical baseline to delineate the linear extent of elevated constituent levels in the wetland downgradient of the ABL and monitor the effectiveness of the groundwater collection system. The results are described in Section 9.3. • Determine the jurisdictional status of three drainage ditches (eastern, middle, and western) to classify conditions at the base of the ABL. Results are documented in a notification of Jurisdictional Determination (U.S. Army Corps of Engineers, 2020). As detailed in Section 2.5.2, groundwater seeps that developed following cover improvements at the ABL were managed with a slurry wall and trench system that intercepts and captures groundwater and conveys it to a public treatment system. Subsequent upgrades to the downgradient seep management system following the CMS starting in 2016 continue to show improvements to groundwater quality on the floodplain of Little Mountain Creek (Section 9). 2.5 Previous Investigations and Remedial Activities As stated in Section 2.4, the RFI identified groundwater in three areas of the Facility that need further action: the ABL (SWMU 2), the OBL (SWMU No. 3), and groundwater in the northern portion of the former Main Plant (MFG, 2001). Investigations and remedial actions to address the RFI findings were implemented and are summarized in Section 2.5.1 through Section 2.5.3. Detailed chronologies of regulatory activities are available in previous submissions to the NCDENR Division of Waste Management and are not repeated in this report (e.g., Environeering, 2010, 2012a, 2012b, 2013, 2015, 2018a, 2018c, 2019). 2.5.1 Former Main Plant The 123-acre former Main Plant encompasses several of the SWMUs that were defined in the RFI (MFG Inc, 2001). Alcoa has conducted interim measure works and soil removal activities for soil at several EHS Support LLC 8 Hydrogeological Conceptual Site Model Update — Badin Business Park Background SWMUs and AOCs in the former Main Plant, which has resulted in No Further Action required to address soil direct contact pathways. Alcoa conducted a Facility -wide investigation to characterize fluoride and total cyanide in groundwater in 2005 and 2006, which involved installing several new monitoring wells. Groundwater in the former Main Plant was retained in the corrective action process as a result of the RFI and subsequent groundwater investigations. Additional Facility -wide groundwater data were collected during the data collection phase of the CMS in 2011 (Environeering, 2012a, 2012b). Based on the data collected during groundwater investigations, fluoride and cyanide are identified as the primary COls in groundwater. Areas with the highest groundwater fluoride and cyanide concentrations are near the On -Site Landfill (SWMU 1) and the West Fill Area (SWMU 46; formerly known as the Coke Management Area). TCE is also identified in the northern portion of the former Main Plant at MW-4, MW-9, MW-16, and MW-110. Following a 2018 groundwater sampling event focused on these four wells, it was concluded that TCE is decreasing in concentration and attenuating due to infiltration of lake water into the groundwater system near MW-110 (Environeering, 2018a). The On -Site Landfill is in the northeastern part of the former Main Plant. Prior to construction of the former Main Plant, the ground surface slope decreased to the east toward Badin Lake. The landfill was established in a natural ravine. The On -Site Landfill is a former SPL landfill with fluoride and cyanide as the primary COls. The On -Site Landfill operated from the 1930s to the mid-1970s. Fill material mainly consists of SPL and other carbonaceous material, metal debris, and silty sand (Geraghty & Miller, 1995). Surface water control improvements were completed in 1996 (Alcoa, 1996), and a minimum of 2-foot thick low permeability soil cover was placed over the unit (MFG, 2011). The West Fill Area is situated at approximately 555 to 560 ft NAVD88 on a hillside west of the area excavated for construction of the former Main Plant. It is located to the west of the former rail trestle and coke storage area. There is a sharp elevation decrease eastward toward the former Main Plant and Badin Lake and an increase in elevation westward toward the residential areas. A review of historical topographic maps, historical photographs, aerial imagery, and recent Facility investigative activities confirms that SWMU 46 is a fill area. This data supports that native fill soils and minor amounts of plant process remnants were used to raise the area by approximately 10 to 20 feet to its existing grade (Environeering, 2012a). 2.5.2 Alcoa Badin Landfill — SWMU 2 The ABL is located approximately 500 feet south of the fenced Former Main Plant and occupies approximately 14 acres (Figure 2-1). The ABL decreases in elevation towards the southwest, south, and southeast in the direction of Little Mountain Creek. Ajurisdictional wetland is located on the Little Mountain Creek floodplain between the toe of the landfill and Little Mountain Creek. The ABL was used by Alcoa and the community in Stanly County as a local "dump" for general municipal refuse and industrial debris for approximately 70 years. The ABL was established in a natural ravine, which extended from south of Wood Street towards Little Mountain Creek. Landfill operations ceased in 1979. Waste materials believed to be deposited in the landfill include solid refuse, construction debris, process wastes, and municipal waste from the town and individuals. Excavated cut soils, excess spoils, and weathered rock from grading in the early-1960s modernization of the Facility were also placed in the ABL. The ABL was rough graded in 1980 using available on -site soils and was seeded with grass. EHS Support LLC 9 Hydrogeological Conceptual Site Model Update — Badin Business Park Background In October 1997, the ABL surface was regraded to control run-off by regrading to a slope suitable for mowing and installing a cover system consisting of 12 inches of silty clay soil, compacted to 95 percent, overlain by a 6-inch vegetative layer consisting of silty clay soil combined with lime and fertilizer. Run-on from high areas was managed by installing both lined and unlined ditches along the flanks of the ABL that discharge to the flood plain of Little Mountain Creek. Channels were lined with a 4-inch-thick concrete revetment mat or jut mat and grass. The channels were designed to accommodate 25-year storm events (Alcoa, 1998). Three seeps were identified at the toe of the ABL following the completion of these activities. In June 2000, the construction of a low -flow seep collection system was completed for combining the three seeps into a single discharge under the Facility's NPDES permit. In 2005, the discharge was eliminated through the installation of a forced main to route the seep water to a utility sewer that leads to Stanly County Utilities' publicly owned treatment works (POTW). In 2016, the existing seep collection system was upgraded to improve overall seep capture and collection efficiency. The previous system collected water from three small seeps in ground surface collection basins. The basins were prone to flooding and surface water infiltration. This caused clean surface water to be captured, pumped, and treated. The new system was intended to intercept water in a below -grade collection trench immediately downgradient of the ABL. In addition, a slurry wall was installed downgradient of the collection trench. The slurry wall was installed to offer two benefits: (1) a barrier against ABL groundwater migrating towards the floodplain, and (2) to provide a barrier so clean groundwater from the floodplain would not flow into the collection trench (Power Engineers Inc, 2017). Following installation of the trench and barrier wall, seeps developed upgradient of the collection trench. In 2017 and 2019, modifications were made to the trench system to collect seeps that developed on the hillside upgradient of the 2016 collection system. The area is currently monitored annually using geophysical surveys to confirm the efficacy of the remedial measure. The efficacy of the ABL collection trench is discussed further in Section 9. 2.5.3 Old Brick Landfill — SWMU 3 The OBL is an approximately 3-acre, unlined landfill located approximately 0.75 miles northeast of the former production Facility on a slope bordered by Badin Lake. Materials including used baking furnace bricks were disposed of in the OBL from 1915 to 1960. Closure of the landfill consisted of covering the area with 12 inches of compacted clay, stabilizing the cap with vegetative cover, and diverting stormwater with drainage ditches (Aquaterra, 1991b). The 2001 RFI report (MFG Inc, 2001) demonstrated that there were no COls present in soils adjacent to the OBL at concentrations exceeding the conservative risk -based screening values. As a result, soils do not present a risk. The RFI results did show that groundwater in a few wells contained total cyanide that exceeded the screening values. The unit was retained in the corrective action process because of the detection of total cyanide in selected groundwater wells above the regulatory standard. Alcoa upgraded the OBL cover system in 2006 to eliminate point source discharges to surface water under the Facility's NPDES permit. This upgrade consisted of cover system reconfiguration to mitigate surface water infiltration, control stormwater flow, and manage stormwater run-off through infiltration or controlled discharge under the NPDES permit (Environeering, 2012a). EHS Support LLC 10 Hydrogeological Conceptual Site Model Update — Badin Business Park Background Given that COIs were not identified at the OBL in monitoring events subsequent to the Phase 3 CMS study, the OBL is not discussed further in this report. EHS Support LLC 11 Hydrogeological Conceptual Site Model Update — Badin Business Park Investigation Activities in 2022 3 Investigation Activities in 2022 Investigation activities completed in 2022 were designed to support the development of a refined understanding of hydrogeological controls on groundwater flow directions and constituent transport at the former Main Plant and ABL. Hydrogeological properties of various geologic units present at the Facility were characterized using the following lines of evidence: • Visual observations of geologic and hydrogeologic properties through observations of drill cores and excavated test pits. • Laboratory characterization of soil physical properties to identify hydrogeologic properties of distinct native soil units, and remolded native soil units as a proxy for fill derived from native soils. • Hydraulic data collection (step drawdown tests) to confirm monitoring wells adequately capture the most conductive units and to qualitatively assess hydraulic properties of weathered rock units. • Measurement of groundwater heads in wells discretely screened across PWR or fractured rock to capture the most conductive intervals to refine potentiometric maps and assess groundwater flow directions. Figure 3-1 illustrates the locations where: • Soil borings, piezometers, and monitoring wells were installed in 2022. • Soil physical property samples were collected in 2022. • Aquifer testing (step drawdown pump tests) was conducted in 2022. Lithologic data was obtained by drilling 21 monitoring wells (MW200 through MW220), 1 piezometer (PZ18RD), and 6 soil borings (B300 through B305) (Figure 3-1). Soil borings and monitoring wells were drilled and installed by SAEDACCO, Inc. of Fort Mill, South Carolina. Initial wells and soil borings were drilled using the sonic technique to obtain continuous soil and rock cores (MW220, B300 through B305) for initial characterization of the soil profiles. In the interest of minimizing time in the field, subsequent monitoring wells were installed using a hollow stem auger and continuous split spoon samples were collected across the saprolite/weathered rock interface. Air rotary drilling was used at locations where more competent material precluded the collection of split spoon samples. Wells and the piezometer were constructed with 2-inch inner diameter polyvinyl chloride (PVC) screens with 0.01-inch slotted PVC screens. Screens were targeted in PWR (or fractured rock where PWR was absent or dry) with short lengths (5 to 10 feet) to avoid screening across overlying soil units. Wells were developed by surging with a surge block followed by purging with a submersible pump. Boring logs for the newly installed monitoring wells that include detailed well construction information are provided in Attachment A. Wells were surveyed by a North Carolina licensed Professional Land Surveyor; survey data and well construction details are provided in Attachment B. EHS Support LLC 12 Hydrogeological Conceptual Site Model Update — Badin Business Park Investigation Activities in 2022 LEGEND IM 2022 Test Pit Locations Q 2022Aquifertesting locations Q 2022 Soil Physical Properly 5amples 2022 Drilling Locations Boring O MW B302 B305 • • 13303 r '3.3nn MW220 jO 0M W 201 'Former Main Plant Figure 3-1 2022 Investigation Locations EHS Support LLC 13 Hydrogeological Conceptual Site Model Update — Badin Business Park Investigation Activities in 2022 Soil characterization samples were obtained from seven drilling locations. Samples were collected in Shelby tubes to be representative of in situ conditions. Samples were also collected in bags and reconstituted in the lab as an indicator of the hydraulic properties of fill composed of native soils. Samples were submitted to integrated Testing Laboratories of Houston, Texas for the following soil physical parameter analysis: • Effective porosity package (moisture content [ASTM D2216], bulk density [American Petroleum Institute {API} RP40], total and effective porosity [ASTM D425]). • Hydraulic conductivity package (hydraulic conductivity and effective permeability to water [API RP 40 and USEPA 9100], grain density and dry bulk density, total porosity, air -filled porosity, and total pore fluid saturation [API RP 40], and moisture content [API RP 40 and USEPA 9100]). Laboratory reports for soil physical results are provided in Attachment C and data are summarized in Table 3-1. Table 3-1 Soil Physical Properties Summary Sample Location MW-201 MW-201 MW-203 MW-204 MW-208 MW-211 MW-212 MW-218 MW-218 Sample Depth (feet) 5 to 7 8 to 9 5 to 7 5 to 9 7 to 9 9 to 13 7 to 9 5 to 7 15 to 17 Sample Lithology Residual Soil/Saprolite Transition Saprolite Residual Soil Saprolite Saprolite Residual Soil Residual Soil Residual Soil Saprolite Sample Orientation Vertical Vertical Vertical Remolded Vertical Remolded Vertical Vertical Remolded Effective Porosity (Percent Volume) Hydraulic Conductivity (cm/sec) 20.93 1.55E-06 17.11 1.58E-07 11.57 2.02E-07 22.21 1.49E-06 20.62 2.36E-07 18.61 3.18E-07 14.56 5.04E-07 17.23 4.28E-07 16.57 3.38E-06 cm/sec = centimeters per second Aquifer testing was completed in nine wells screened across PWR or fractured rock using the step- drawdown method. The method involved inserting a Monsoon° pump and Levellogger° pressure transducer into the test well and the water level was allowed to equilibrate. Pumping was initiated and the rate was increased in steps and terminated after approximately 1 hour or when the well ran dry. Pumping rates were determined based on the water level response of the particular location and ranged from 200 to 7,300 milliliters per minute (mL/min). Data was recorded in 5-second intervals using the pressure transducers and converted to a depth to water. Hydraulic conductivity was then calculated from the pumping rate and transducer data using Aqtesolv° software. Detailed aquifer testing calculation results and software output are provided in Attachment D and summarized in Table 3-2. EHS Support LLC 14 Hydrogeological Conceptual Site Model Update — Badin Business Park Investigation Activities in 2022 Table 3-2 Aquifer Testing Results Location Method Hydraulic Conductivity (cm/sec) MW-201 Theis step test — confined aquifer 1.93E-04 MW-203 Theis step test — confined aquifer 4.22E-05 MW-205 Theis step test — confined aquifer 3.36E-04 MW-209 Theis step test — confined aquifer 4.91E-05 MW-210 Theis step test — confined aquifer 4.52E-05 MW-211 Theis step test — confined aquifer 2.74E-04 MW-218 Theis step test — confined aquifer 6.42E-05 MW-220 Theis step test — confined aquifer 2.12E-05 BF-2 Theis step test — confined aquifer 3.94E-05 Calculations performed by Civil Environmental Consultants (CEC) of Greenville, South Carolina (included in Attachment D). cm/sec = centimeter per second Depth to groundwater measurements were completed on September 9, 2022, and October 19, 2022, in newly installed monitoring wells and existing wells screened across PWR or fractured rock. Depth to water measurements were gauged from the top of casing with an electronic resistivity probe, which measured the water depth with a precision of ± 0.01 foot. The measuring device was cleaned prior to use in each well. Water levels were captured prior to any subsequent disturbance to the well. The water levels in the wells were made consecutively in the shortest period (less than one day). Results are discussed in Section 6.5. Groundwater elevation measurements are provided in Attachment E. Two test pits were excavated, and groundwater samples were collected from wells and borings upgradient of the West Fill Area (SWMU 46) to better understand groundwater hydrology and contaminant fate and transport in this area. Test pit locations and the West Fill Area are shown on Figure 3-1. Test pits were dug to qualitatively observe the location and magnitude of groundwater flow over a subsurface profile in the upslope and flat area of the former Main Plant. Test pits were secured and left open for approximately 24 hours to observe if and how much groundwater accumulated. Residual soil/saprolite intervals of the test pits were dry and minor groundwater seepage was observed along fractures in the PWR interval. Observations from the test pits are used to support the Site hydrogeologic conceptualization as described in Section 6. Samples were collected under chain of custody protocol from borings B300, B301, B302, B303, B304, B305, MW218, and MW219 and analyzed using USEPA-approved methods for fluoride (Method 300.0), total cyanide (Method D7511-12), and available and free cyanide (Method OIA-1677). Samples were collected using a portable (non -dedicated) bladder pump using low -flow purging and sampling procedures. Reusable equipment used to collect groundwater samples was decontaminated before use at another well. Dedicated air supply and water discharge tubing lines were used at each well to reduce the level of decontamination required between wells. Each well was purged at a relatively low rate to reduce drawdown. The purge water was field-tested for pH, turbidity, specific conductance, oxidation- reduction potential (ORP), and temperature. Wells were purged according to low flow sampling criteria (Puls and Barcelona, 1996). Samples were collected directly into laboratory -prepared bottles, labeled, and placed on ice in sealed coolers for delivery to a North Carolina -certified laboratory for analysis. All EHS Support LLC 15 Hydrogeological Conceptual Site Model Update — Badin Business Park Investigation Activities in 2022 purge water was containerized in 55-gallon drums, labeled, stored at a secure Site location, and will be disposed of when waste characterization is complete. Groundwater field parameter data and the laboratory analytical report are included in Attachment F. No compounds were detected above applicable NC 2L standards. EHS Support LLC 16 Hydrogeological Conceptual Site Model Update — Badin Business Park Regional Setting 4 Regional Setting 4.1 Regional Geology The Facility is located in the Piedmont physiographic province of the Appalachian Highlands physiographic region (Fenneman, 1917). The Piedmont physiographic province is characterized by dominant ridgelines that follow the strike of resistant lithologies, valleys perpendicular to ridgelines that follow regional fault structures, and many small hills cut by streams flowing in a dendritic pattern. Streams are associated with flat -lying alluvial deposits (alluvium) at the base of valleys. Overall, the ground surface has relatively low relief due to heavy weathering of the underlying rocks. The intense weathering promotes the collapse of hillsides resulting in localized colluvium deposits. Rocks underlying the eastern half of the Piedmont (where the Facility is located) belong to the Carolina Slate Belt (Figure 4-1). Inner Piedmont Carolina Slate Belt Triassic Basins Raleigh Belt Eastern Slate Belt Source: Steponaitis, V.P., J.D. Irwin, T.E. McReynolds, and C. Moore. 2006. Stone Quarries and Sourcing in the Carolina Slate Belt. Research Report 25, Research Laboratories of Archaeology, University of North Carolina, Chapel Hill, NC 27599-3120. April. Figure 4-1 Regional Geographical and Geological Overview Rocks of the Carolina Slate Belt were deposited through a combination of sedimentary processes and fallout from volcanic eruptions (North Carolina Geological Survey, 1985). Sediments that lithified to form Slate Belt rocks were originally deposited beneath water, likely in a submarine setting (Feiss, 1982). The North Carolina Geological Survey (1985) describes Carolina Slate Belt rocks in the former Main Plant and ABL areas as Cambrian age metamudstone and meta-argillite interbedded with metamorphosed sandstone, conglomerate, and metavolcanic rocks of the Cid Formation. Regionally, the mudstone grades upward into shale (Stromquist and Sundelius, 1969). The lithologic variation has produced northeast -southwest trending ridgelines and valleys that follow the strike of bedding. Carolina Slate Belt rocks in the region are mildly metamorphosed and deformed, leading to northeast -southwest fold hinge axes in the Facility vicinity that are intersected by perpendicular faults. The orientations of bedding/fold hinges and the perpendicular fractures broadly dictate the crisscross pattern of river drainages in the area. The orientation of Little Mountain Creek aligns with perpendicular fractures, whereas the perpendicular tributaries follow the strike of bedding and fold hinges. At the OBL east of the former Main Plant, the Cid Formation consists of mafic metavolcanic rocks composed of dark green to black basalt flows and basaltic tuffs interbedded with intermediate volcanic rock and metamudstone. In this location east of the former Main Plant, drainages follow a dendritic EHS Support LLC 17 Hydrogeological Conceptual Site Model Update — Badin Business Park Regional Setting pattern. A large-scale geologic map of the Facility region sourced from Stromquist and Henderson (1985) is provided as Figure 4-2. Fracture orientations measured at former Alcoa Badin Works (MFG, Inc., 2001) r r Pzgu - Uralitized gabbro £mf - Tuffaceous siltstone £cf - Rhyolitic tuff £cft - Rhyolitic tuff breccia £cm - Tuffaceous mudstone Ecmb - Basaltic rocks Ecmt - Rhyolitic tuffs Base map source: Stromquist, A.A. and Henderson, J.R., 1985. Geologic and geophysical maps of south-central North Carolina (No. 1400). MFG, Inc., 2001. RCRA Facility Investigation Report Volume I of II. Alcoa Badin Works, Badin, North Carolina. March. Little Mountain Creek Ecf FOr IT1er Main Plant Alcoa/Badin Landfill Old Brick, Landfill Figure 4-2 Regional Geology and Geologic Structure Orientations EHS Support LLC 18 Hydrogeological Conceptual Site Model Update — Badin Business Park Regional Setting Rocks of the Piedmont are heavily weathered at the ground surface due to a combination of high rainfall and the humid and warm climate. As a result of the climate, the thickness of the rock weathering profile in the Piedmont can range anywhere between 1 and 25 meters, although weathering is typically thinner on ridgetops and slopes (Buol and Weed, 1991; Sowers and Richardson, 1983). The subsurface profile is characterized by a gradual transition from soil through decomposed to unweathered rock with increasing depth. The boundaries between different weathering zones are not well defined and the transitions are gradual. The thickness of the zones may also be highly variable over small spatial extents (e.g., up to 20 meters over an area the size of a city block; Sowers and Richardson, 1983). A generalized soil profile overlying metasedimentary rocks in the Piedmont Physiographic province is shown on Figure 4-3. a 3 6 w w S w 2 i12 a w 15 18 // ///// //////// Soil Massive subsoil ///////// ////////✓ ///////// ///////// ///////// ///////// Saprolite (thick) ///////// ///////// 7'//////// ///////// ///////// ///////// '� Weathered rock ''' .. Unweathered rock ', rice': Source: Pavich, M.J., G.W. Leo, S.F. Obermeier, and J.R. Estabrook. 1989. Investigations of the characteristics, origin, and residence time of the upland residual mantle of the Piedmont of Fairfax County, Virginia (No. 1352). Figure 4-3 Generalized Weathering Profile and Nomenclature of Foliated Metasedimentary Rocks from the Piedmont Physiographic Province Unweathered rock is present beneath the weathering zone, and typically has minimal to no staining on fractures and joints, and mica and feldspar are unaltered (Pavich et al., 1989). A zone of PWR exists above the unweathered rock and is characterized by soft to hard rock where joints and fractures are typically stained, and primary rock minerals are altered in part. PWR grades upward into a zone of residual soils. In general, residual soils are derived in place from the chemical decomposition (weathering) of primary minerals in the underlying PWR and bedrock. If weathering results in small volume changes and the original fabric and most original rock defects are retained, soils are called 'saprolites' (Sowers and Richardson, 1983). When the weathering is accompanied by large volume changes and little or none of the original rock fabric remains, residual soils EHS Support LLC 19 Hydrogeological Conceptual Site Model Update — Badin Business Park Regional Setting are often called 'residual soils' or 'massive sub soil'. Examples of the appearance of residual soil, saprolite, and PWR from photographs taken at the Facility are provided in Figure 4-4. f£1esidual Soil (high storage, low. p'rmeability) - high.storage, low permeability) Partiall. Weathered • (PWR) .(High permeability, row sto Figure 4-4 Examples of Native Soils Encountered at the Facility 4.2 Regional Hydrogeology The extent of weathering has important implications for the hydrogeological properties of the soil profile. Unweathered rock and PWR are characterized by high permeability from fracture connectivity, whereas the dominantly clay saprolite/residual soils are characterized by high porosity and low permeability. The porosity -permeability relationship through a generalized weathering profile is illustrated on Figure 4-5. EHS Support LLC 20 Hydrogeological Conceptual Site Model Update — Badin Business Park Regional Setting Profile Residual Soil Saprolite Partially Weathered Rock I I 1 Fresh Rock I Description Sail 'A' horizon: generally < 0.5 m thick. Generally a red sandy soil, high porosity, well drained and leached Soil'B' horizon: depositional zone with formation of laterite or calcrete. Thickness varies up to 15 in Zone'a' (soil'C' zone): Few metres thick sandy clay or clay sand, often concretionary Zone 'b': 1-30m thick Massive accumulation of secondary minerals (clays) in which some stable primary minerals may be present in their original form Low permeabiiiry and high porosiry Zone 'c': 1-30m thick Rock which is progressively altered upward to a granular friable layer of disintegrated crystal aggregates and rock fragments Intermediate porosity and permeability Zone 'd': 1-20m thick Fractured and fissured rock Low porosity but moderate to high permeability in fissures Fresh rock Permeability (relative) Low High Porosity (approximate) 0 (` ) 40 Source: Acworth, R.I. 1987. The development of crystalline basement aquifers in a tropical environment. Quarterly Journal of Engineering Geology and Hydrogeology, 20(4), pp.265-272. Figure 4-5 Typical Rock Weathering Profile The residual soil and saprolite are storage zones where groundwater is 'trapped' due to the high relative porosity values (typically between 35 and 55 percent) and low relative permeability (Figure 4-5). Precipitation infiltrates soil until it reaches the saturated zone, where it is stored in pore spaces. Groundwater in the storage zone seeps from residual soil or saprolite into the PWR, where the porosity is lower but the relative permeability is substantially higher. It is within the PWR that groundwater primarily discharges and flows (LeGrand, 1967). The water table elevations in the Piedmont soils generally follow the ground surface and can vary by several feet in response to precipitation events (LeGrand, 1967 and 2004; Buol and Weed, 1990; Sowers and Richardson, 1983; Daniel and Dahlen, 2002; Swain et al 2004; McVay et al., 2004). However, the presence of structures and fractures in PWR and unweathered rock can influence groundwater flow directions. Groundwater flow is typically 10 times greater parallel to planar structures in PWR than perpendicular to it (Sowers and Richardson, 1983). In the rock, groundwater is contained entirely in fractures, and groundwater elevations can vary over a few feet depending upon the localized interconnectivity of fractures (Sowers and Richardson, 1983). EHS Support LLC 21 Hydrogeological Conceptual Site Model Update — Badin Business Park Site Geology Site Geology Geology and hydrogeology at the Facility differ from the regional framework due to the extensive engineered cut and fill activities that took place during Facility construction and redevelopment activities throughout the 1900s. The magnitude of change is visualized in Figure 5-1, which shows the pre -development topography reconstructed from a 1913 topographic survey and lake bathymetry data. Main Plant l/. Pre-1913 Topography and Generalized Groundwater Flow Figure 5-1 I,ODO 2,000 feet N J Post-1916 Topography and Generalized Groundwater Flow Badin Lake Conceptual Effect of Facility Development on the Groundwater Flow System Before filling Badin Lake and excavating areas of native soils, groundwater flow likely followed a typical, topographically -driven Piedmont groundwater flow system with a topographic divide across the area that would become the former Main Plant (Figure 5-1). Groundwater in the southern portion of the former Main Plant flowed toward the southeast and ultimately discharged to the Little Mountain Creek floodplain. Groundwater in the northern portion of the former Main Plant would have likely flowed east and northeast to the former valley that became Badin Lake. Filling Badin Lake and excavation and fill for development of the Facility modified the natural groundwater flow system. Badin Lake is not a natural feature; it is a man-made feature that was filled against a steep -sided valley wall of exposed and permeable PWR. PWR is observed outcropping along the lake shore (Figure 5-2) and was also documented on the lake bottom when the lake was lowered for the Badin Lake sediment capping project (photo 96 of Power Engineers Inc., 2013). Extensive excavation removed residual soils over a substantial portion of the former Main Plant leaving only PWR and rock and introduced native soils and production wastes to valleys in other areas of the Facility. This engineering work conducted over the 1900s modified the geological controls on groundwater flow directions. EHS Support LLC 22 Hydrogeological Conceptual Site Model Update — Badin Business Park Site Geology Figure 5-2 December 2021 Photo of PWR Outcropping Along the Shore of Badin Lake Adjacent to the Former Main Plant As illustrated conceptually on Figure 5-1 and documented in the following sections, groundwater is now recharged both by Badin Lake from the east and from higher elevations west of the former Main Plant and ABL. Recharge to groundwater from Badin Lake occurs through a direct connection to permeable PWR, and groundwater flows from the northeast to southwest through PWR and rock along regional structures to ultimately discharge on the floodplain of Little Mountain Creek. 5.1 Areas of Engineered Cut and Fill To demonstrate the magnitude of topography changes and identify where the location of PWR and infrastructure within PWR affects groundwater flow directions, the modern ground elevation was compared to elevation data from a survey conducted in 1913 prior to development of the Facility (Figure 5-3). Figure 5-3 was developed by digitizing elevation contours measured in 1913 before plant development and subtracting the modern (2003) elevation obtained from public 1/9 arc -second digital elevation data obtained from the USGS. The Alcoa elevation datum used on the 1913 map was corrected by subtracting 31.48 feet to match the NAVD88 datum. Where historical contours did not extend, fill thickness was taken from Facility boring logs that fully penetrated the fill. The result is shown on Figure 5-3; the EHS Support LLC 23 Hydrogeological Conceptual Site Model Update — Badin Business Park Site Geology excavated areas are shaded gray, and the filled areas are shaded red. White shading indicates areas where there was minimal elevation change. LEGEND El Area of Fill ( Env roneeri rig 20120 1 Topography Change 1913 to 2003 (feet) a-25 -5 to ICI 25 >50 500 000 R Alcoa/Badin Landfill Gray = excavated area Red = filled area Note: Historic elevation data did not extend north of the Pine Grove area; therefore, fill areas are not shown for these locations. Figure 5-3 Areas of Engineered Cut and Fill EHS Support LLC 24 Hydrogeological Conceptual Site Model Update — Badin Business Park Site Geology In areas where valleys were filled (e.g., ABL, West Fill Area, On -Site Landfill), material was placed upon the existing saprolite and residual soil where it was present. Locations where residual soil and saprolite are believed to be thin or absent beneath fill are only very localized portions of drainages that occupied the bottom of subsequently filled ravines. Geophysical surveys presented in the 2001 RFI (MFG Inc, 2001) and CMS Phase 3 (Environeering, 2012b) reports indicate that fill is heterogenous; there are localized areas where fill contains industrial materials interlayered with reworked native soils. Other areas likely consist of native soils that were excavated and used as fill during Facility development and construction. In areas where material was excavated, residual soil and saprolite were entirely removed from underlying PWR and rock in some areas and replaced by a thin veneer of fill. Figure 5-4 was developed from Facility boring logs and shows the cross section that runs from Badin Lake to Little Mountain Creek, the relationship of fill to residual soils in former valleys, and how soil was removed from PWR and rock in places. Northeast Southwest A A' 0 m 0 0 c E o 0 _o 0 0 o w In 0 O fo O 7 N O w V1 V 3G Ground Surface 1913 \\J yea 50� Ground Surface acz Ja\ �e /am Present Day •\ L/ QS�� sa yaQsom ysec 2 N N N N i144 3 33 2 _ I I I 0 1000 1111 Fill ■ ReslduaiSell Saprolite Partially Weathered Rock ^ Notes: Fractured Rock L. Red wells are no longer present. Borehole Monkaring Wel! Screen( well production znne 2000 I I I I I I 3000 Distance (feet) 4000 I I I Figure 5-4 Cross -Section from Badin Lake to Little Mountain Creek Crossing the Former Main Plant and ABL 5.2 Areas of Excavated Soils 5000 To demonstrate areas where excavation depths largely removed soils, an image was developed to show the depth to PWR or rock (Figure 5-5). The image was developed from historical boring logs and observations of outcrops to show the depth to PWR or fractured rock across the Facility. Beneath the E } Little Mountain Creek EHS Support LLC 25 Hydrogeological Conceptual Site Model Update — Badin Business Park Site Geology western edge of the former Main Plant, shallow PWR or rock is present below a thin veneer (generally less than 10 feet thick) of unsaturated clayey fill. LEGEND o PWR Control Paints Depth to PWR or Fractured Rock (feet) �0 1 5 10 0 1s I I 20 25 1 130 1 135 El 40 �45 > 50 500 1,000 ft Al€oa/Badin Landfill Rine Grove flnsite Landfill Former -° Main Plant Figure 5-5 Depth to PWR or Fractured Rock EHS Support LLC 26 Hydrogeological Conceptual Site Model Update — Badin Business Park Site Geology Residual soils and saprolite were removed from the underlying PWR and fractured rock over a large portion of the former Main Plant in this area. Where residual soil and saprolite were largely removed and replaced with a thin veneer of fill, precipitation can infiltrate directly into PWR or rock and the dominant control on the groundwater flow direction is geologic structures within these units. Based on strike and dip measurements of bedding in rock and PWR outcrops measured with a Brunton compass during field efforts in 2022 (Figure 5-6), the strike of bedding and predominant geologic structures at the former Main Plant trends between Badin Lake and the flood plain of Little Mountain Creek. Note, the strike and dip features measured in 2022 align with the strike of regional geologic structures indicated on Figure 4-2. Note: Numbers indicate bedding dip in degrees from horizontal. Short lines indicate dip direction, long lines indicate strike direction. Figure 5-6 PWR and Rock Bedding Strike and Dip Measured in 2022 EHS Support LLC 27 Hydrogeological Conceptual Site Model Update — Badin Business Park Site Geology 5.3 Areas of Fill As indicated on Figure 5-3, areas of fill are present at the north end of the plant, where they were used to fill in an eastward trending natural ravine. This valley is referred to as the "Northwest Valley" in other facility documents and includes two identified SWMUs — the On -Site Landfill (SWMU-1) and the Pine Tree Grove (SWMU 44). A second eastward trending ravine was present to the south and is now occupied by the West Fill Area. The ABL was developed over a bifurcated natural ravine that trended south to southwestward toward Little Mountain Creek. Materials used to fill the ravines included both natural soils and anthropogenic materials (Environeering, 2012b). At the Pine Tree Grove area, the valley terminated at an embayment in Badin Lake that was filled at some time in the mid- to late-1900s. Fill materials consist of decaying organic material, mulch, and wood debris; sand, silt, and clay soils; construction debris including gravel, concrete, brick, and rock fragments; aluminum scrap; and granular carbonaceous material. Primarily clayey silt residual soils and saprolite are present beneath fill materials. PWR is present beneath the residual soils (Environeering, 2012b). In the West Fill Area, fill materials consist primarily of sand, silt, and clay soils with minor lenses of granular carbonaceous material. Residual soils and saprolite are present beneath fill materials and are mainly clayey -silt with subordinate sandy silt/silty sand. Saprolite and residual soils are thin and less than 1 foot thick near the center of this historical valley and are underlain by PWR (Environeering, 2012b). Fill at the ABL is described as concrete slabs, brick and concrete fragments, bottles, black cinders, nails, rope, aluminum sheeting, plastic sheeting, organic and wood fragments, coal, rubber, and metal pieces. A substantial amount of natural materials and construction debris were placed in the ABL following plant development activities. As indicated on Figure 5-3, areas of fill are spatially discrete and further modified by remediation activities (e.g., capping and drainage modifications to the On -Site Landfill and ABL; Section 2.5). The only continuous unit at the Facility is the PWR-fractured rock system, and the hydraulic properties and characteristics of the PWR-fractured rock system control groundwater fate and transport across the former Main Plant and ABL. EHS Support LLC 28 Hydrogeological Conceptual Site Model Update — Badin Business Park Site Hydrogeology 6 Site Hydrogeology This section summarizes the primary controls on hydrogeology at the Facility, with supporting information provided in Section 6.1 through Section 6.5. The primary controls for hydrogeology at the Facility are the location of groundwater recharge on the slope to the west of the Facility, from Badin Lake east of the Facility, and the location of permeable units and associated structures that direct groundwater flow. The location of infrastructure and the relationship to permeable units also places an important control on groundwater flow directions. The primary permeable units at the Facility are PWR and fractured rock. The importance of groundwater flow in the PWR is evident from observations of the test pit completed near boring B300 in 2022. A test pit was excavated through residual soil and saprolite to intercept the PWR. Observations of the test pit walls indicate seepage along PWR and rock fractures, whereas the residual soil and saprolite were observed to be dry (Figure 6-1). s. Residual Soil/Saprolite (Dry) Transition to Partially Weathered Rock (PWR) Figure 6-1 Groundwater Seepage in Test Pit Walls Completed in PWR 6.1 Monitoring Well and Piezometer Network In March 2020, Alcoa performed an assessment of the monitoring well network. Of the 113 wells and piezometers documented at the Badin Business Park and outlying SWMUs, 106 are believed to be present. This does not include the 21 monitoring wells and 1 piezometer installed in 2022. The following details the 7 wells that are believed to be inoperable. Badin Business Park wells BF-3, BF 4, BF-7, and B016-MW-1 through B016-MW-3 were located in areas impacted by 2012 demolition activities and are assumed to be destroyed. Well MW-26 was located in an area south of the Pine Tree Grove Area and is believed to have been affected by soil placement activities and is no longer accessible. EHS Support LLC 29 Hydrogeological Conceptual Site Model Update — Badin Business Park Site Hydrogeology Wells have been installed by different contractors over the years, and lithology descriptions differ. Wells are generally screened across the following lithologies (Environeering, 2012b): • Soil units, including residual soil or saprolite (not always distinguished from each other) • PWR described as hard weathered rock (HWR) or soft weathered rock (SWR) • Fractured rock that is relatively unweathered The focus of the present study is the monitoring wells listed in Attachment E that are screened in PWR and/or fractured rock, or with screens or sand packs that partially span low permeability saprolite and are mostly screened in PWR. 6.2 Hydraulic Conductivity Hydraulic conductivity values calculated from slug or pumping tests in Facility monitoring wells have been provided in several historical reports. Historical hydraulic conductivity for bedrock (including pump test data from the present study) is provided in Table 6-1. Note, all values in Table 6-1 were converted to centimeters per second (cm/sec) for consistency. EHS Support LLC 30 Hydrogeological Conceptual Site Model Update — Badin Business Park Site Hydrogeology Table 6-1 Hydraulic Conductivity Data Summary Well Location Screen Material Test type Hydraulic Conductivity (cm/sec) Source ABL-MW-1 ABL PWR/Rock Average of slug in and slug out 8.33E-05 Aquaterra, 1991a ABL-MW-1 ABL PWR/Rock Slug out 9.20E-05 MFG Inc, 2001 ABL-MW-6 ABL PWR/Rock Average of slug in and slug out 7.29E-04 Aquaterra, 1991a ABL-PZ-1I ABL PWR/Rock Slug in 5.70E-05 MFG Inc, 2001 ABL-PZ-1D ABL PWR/Rock Slug in 3.50E-05 MFG Inc, 2001 ABL-PZ-21 ABL PWR/Rock Slug in 4.30E-05 MFG Inc, 2001 ABL-PZ-2D ABL PWR/Rock Slug in 6.00E-05 MFG Inc, 2001 ABL-PZ-31 ABL PWR/Rock Slug in 1.40E-04 MFG Inc, 2001 ABL-PZ-3D ABL PWR/Rock Slug in 2.10E-04 MFG Inc, 2001 MW-2A Main Plant PWR/Rock Average of slug in and slug out 4.16E-04 Geraghty & Miller, Inc., 1995 MW-6A Main Plant PWR/Rock Average of slug in and slug out 7.06E-04 Geraghty & Miller, Inc., 1995 MW-20A Main Plant PWR/Rock Average of slug in and slug out 2.09E-05 Geraghty & Miller, Inc., 1995 MW-25A Main Plant PWR Average of slug in and slug out 7.16E-04 Geraghty & Miller, Inc., 1996 MW-1 Main Plant PWR Slug out 2.97E-05 Law, 1990 MW-3 Main Plant PWR Slug out 3.88E-05 Law, 1990 MW-8 Main Plant PWR Slug out 2.11E-03 Geraghty & Miller, Inc., 1996 MW-9 Main Plant PWR Slug out 7.44E-03 Geraghty & Miller, Inc., 1996 MW-17 Main Plant PWR Slug out 6.93E-05 Geraghty & Miller, Inc., 1996 MW-201 Main Plant PWR Step drawdown (pump) 1.93E-04 This report MW-203 Main Plant PWR Step drawdown (pump) 4.22E-05 This report MW-205 Main Plant PWR Step drawdown (pump) 3.36E-04 This report EHS Support LLC 31 Hydrogeological Conceptual Site Model Update — Badin Business Park Site Hydrogeology Well Location Screen Material Test type Hydraulic Conductivity (cm/sec) Source MW-209 Main Plant PWR Step drawdown (pump) 4.91E-05 This report MW-210 Main Plant PWR Step drawdown (pump) 4.52E-05 This report MW-211 Main Plant PWR Step drawdown (pump) 2.74E-04 This report MW-218 Main Plant PWR Step drawdown (pump) 6.42E-05 This report MW-220 Main Plant PWR Step drawdown (pump) 2.12E-05 This report BF-2 Main Plant PWR Step drawdown (pump) 3.94E-05 This report PWR/Rock geometric mean: 1.25E-04 MW-6 Main Plant Anthropogenic Fill Average of slug in and slug out 1.72E-04 Geraghty & Miller, Inc., 1995 MW-25 Main Plant Anthropogenic Fill Slug out 7.37E-03 Geraghty & Miller, Inc., 1996 MW-26 Main Plant Anthropogenic Fill Slug out 9.02E-03 Geraghty & Miller, Inc., 1996 ABL-PZ-2S ABL Anthropogenic Fill Slug out 2.30E-04 MFG Inc, 2001 Anthropogenic Fill geometric mean: 1.27E-03 MW-ML-3 ABL Soil/PWR Average of slug in and slug out 3.71E-04 Aquaterra, 1991a MW-ML-4 ABL Alluvium/Soil/PWR Average of slug in and slug out 4.34E-05 Aquaterra, 1991a MW-ML-5 ABL Alluvium/Soil/PWR Average of slug in and slug out 6.71E-04 Aquaterra, 1991a ABL-MW-7 ABL Fill/Alluvium Pump test 1.30E-03 Environeering, 2015 MW-2 Main Plant Soil/Saprolite/PWR Slug out 7.97E-05 Law, 1990 MW-2 Main Plant Soil/Saprolite/PWR Average of slug in and slug out 3.25E-04 Geraghty & Miller, Inc., 1995 MW-4 Main Plant Soil/SWR Slug out 2.18E-04 Law, 1990 MW-5 Main Plant Fill/Soil/PWR Slug out 1.37E-04 Law, 1990 MW-5 Main Plant Fill/Soil/PWR Average of slug in and slug out 1.04E-03 Geraghty & Miller, Inc., 1996 PZ-6 Main Plant Fill/Soil Average of slug in and slug out 3.42E-03 Geraghty & Miller, Inc., 1996 EHS Support LLC 32 Hydrogeological Conceptual Site Model Update — Badin Business Park Site Hydrogeology Well Location Screen Material Test type Hydraulic Conductivity (cm/sec) Source ABL-PZ-1S ABL Native Fill Material/Saprolite Slug Out 6.70E-06 MFG Inc, 2001 ABL-PZ-4 ABL Saprolite/Alluvium/Fill Material Slug Out 9.10E-04 MFG Inc, 2001 Mixed rock geometric mean: 2.80E-04 ABL = Alcoa Badin Landfill cm/sec = centimeters per second PWR = partially weathered rock SWR = soft weathered rock Aquaterra, Inc. 1991a. Preliminary Soil and Ground Water Assessment, Badin Municipal Landfill, Aluminum Company of America, Inc., Badin, North Carolina. August 14. Environeering, 2015. Alcoa Badin Landfill and Former Ball Field Sampling Activities. Former Badin Works Facility, Badin, North Carolina. September 15. Geraghty & Miller. 1995. Hydrogeologic Investigation at SWMU #1 - The On -Site Landfill for Aluminum Company of America Badin, North Carolina. October. Geraghty & Miller. 1996. Pine Tree Grove Area Investigation for Aluminum Company of America, Badin, North Carolina. November. Law. 1990. Phase I Ground -Water Assessment Northwest Valley; Alcoa-Badin Works. MFG Inc. 2001. RCRA Facility Investigation Report Volume I of II. Alcoa Badin Works, Badin, North Carolina. March. ENS Support LLC 33 Hydrogeological Conceptual Site Model Update — Badin Business Park Site Hydrogeology Hydraulic conductivity data for wells at the former Main Plant and ABL have been collected from wells screened exclusively in rock or PWR, and wells exclusively screened in fill materials. Hydraulic conductivity data exists for several other wells; however, these wells are screened across multiple units and the values are not representative of native soils. Notably, no hydraulic conductivity data is available for wells screened exclusively in native soil, except for the following wells: • ABL-MW-2 was drilled using an air rotary drill and logged from the air rotary cuttings. There is uncertainty in contacts between units due to the drilling method. • PZ-5 through PZ-11 are reportedly screened in saprolite, and hydraulic conductivity values from slug tests are provided in the RFI report (MFG Inc, 2001). Logs for these piezometers are not available to verify that the lithology intercepted by the screen and filter packs is exclusively saprolite. Since the hydraulic conductivity data for ABL-MW-2 and PZ-5 through PZ-11 are not reliable indicators of the hydraulic properties of native soils, the corresponding hydraulic conductivity values are not included in Table 6-1. No Facility monitoring wells are definitively and exclusively screened in residual soil or saprolite at the Facility, most likely because the units did not yield sufficient groundwater during drilling. To address the data gap pertaining to the hydraulic properties of residual soil and saprolite, samples were collected in 2022 and submitted for laboratory testing of hydraulic properties (Section 3). Both in situ samples and reconstituted samples were measured for hydraulic properties to estimate the hydraulic properties of in situ native soils and soils reworked and used as fill material. The results indicate overall low vertical hydraulic conductivity values for these units of 1.58 x 10-7to 3.38 x 10-6 cm/sec (Table 3-1). In contrast to native soils, hydraulic conductivity values of wells screened over fill containing industrial materials are substantially higher (geometric mean of 1.27 x 10-3 cm/sec; Table 6-1). However, as described in Section 5.3, areas of fill are spatially discrete and do not form a continuous water -bearing unit. Furthermore, the hydraulic properties are highly heterogenous with localized, higher hydraulic conductivity areas defined by SWMUs where industrial materials are present and low hydraulic conductivity areas where native soils were used to fill topography during plant construction. Vertical (and lateral) groundwater flow into and out of areas of fill containing industrial materials is limited by low permeability saprolite and residual soils that were present prior to placement of fill. It is only in limited and discrete areas, where saprolite or residual soil was eroded or excavated prior to placement of fill, that there is significant communication between anthropogenic fill and PWR or fractured rock. Unlike fill materials, PWR and fractured rock occur over the entire former Main Plant and ABL areas. As indicated in Table 6-1, the PWR/fractured rock groundwater system has modest hydraulic conductivity (geometric mean of 1.25 x 10' cm/sec). The values obtained from PWR wells installed across the Facility in 2022 using step draw -down tests are a similar order of magnitude to those previously obtained from Facility PWR wells via slug tests and indicate the PWR has similar hydraulic properties across the former Main Plant and ABL. Because of the broad extent and consistent hydraulic conductivity values, PWR is the primary unit through which groundwater moves and controls COI fate and transport at the Facility. As described in previous studies, the combination of weathered bedrock and fractures in unweathered bedrock creates intervals of high hydraulic conductivity. The importance of fractures for creating areas EHS Support LLC 34 Hydrogeological Conceptual Site Model Update — Badin Business Park Site Hydrogeology of higher hydraulic conductivity is evidenced by the loss of fluid circulation during coring and drilling at MW-20A (Geraghty & Miller Inc, 1995). The orientation of these fractures is an important factor that controls groundwater flow directions. Vertical Groundwater Gradients Vertical groundwater gradients at the former Main Plant were studied during the 2001 RFI (MFG Inc, 2001) and are summarized below. Water -level data from paired wells with screens completed at different elevations were historically evaluated. Wells that were evaluated included the MW-2/2A, MW- 6/6A, MW-20/20A, and MW-25/25A well pairs. • The MW-2/2A and MW-20/20A well pairs are on the western side of the former Main Plant near the On -Site Landfill, and a downward vertical groundwater potential from fill to PWR or fractured rock was noted. These wells are located in and around the On -Site Landfill, and downward groundwater migration is limited by the presence of pre-existing saprolite and/or residual soils. • The MW-6/6A and MW-25/25A well pairs are closer to Badin Lake, and an upward vertical gradient was noted. The upward vertical gradient at MW-6/6A and MW-25/25A indicates potential upward groundwater movement from the PWR and fractured rock into the unconsolidated water table units in areas closer to the lake. This is consistent with the conceptualization that Badin Lake provides recharge to PWR and fractured rock along bedding planes exposed beneath the lake level. As indicated on the hydrographs in Section 6.4, there are periodic and short-lived 'spikes' where there is a downward gradient from fill to the PWR system in the vicinity of MW-27 and MW-17, likely associated with precipitation events that soak into higher permeability areas of fill and rapidly dissipate into the PWR groundwater system. Hydrographs for ABL piezometers were presented in the 2012 Phase 3 CMS following a two-year transducer deployment (Environeering, 2012b); the data are reproduced in Figure 6-2. • Transducer data show water levels at the PZ-1S, PZ-11, and PZ-1D cluster (upgradient edge of the ABL) have consistently downward gradients. • Near the center of ABL at the PZ-2S/PZ-2D cluster, there are apparent downward vertical gradients. The magnitude of response in both wells is similar (note, the shallow well appears to have dried up periodically), and both wells vary in concert. • At the PZ-3 cluster on the floodplain of Little Mountain Creek, vertical groundwater gradients are consistently upward. These results are consistent with groundwater discharge from beneath the ABL and from the hillside to the west to the floodplain of Little Mountain Creek. Groundwater discharge to the floodplain of Little Mountain Creek is also supported by periodically flowing artesian conditions at monitoring well ABL- MW-3, which is located on the western side of the floodplain. EHS Support LLC 35 Hydrogeological Conceptual Site Model Update — Badin Business Park Site Hydrogeology PZ-1 S PZ-1 I 520 - PZ-1 D E is 0 PZ-2S 500 PZ-2D Z E 2 480 - W PZ-3D PZ-3S PZ-31 460 - — ,10 ,10 ,10 ,10 10 ,10 ,11 •,,�� ,11 11•11 ,11 ,1� •1`Z ,1'L Fee pp N�� Qs9 od �a� Fee pPc S‘,5' Aug 06' Qgo Fee Sample Date NAVD88 = North American Vertical Datum of 1988 Figure 6-2 2010-2012 Transducer Study Results from the ABL 6.4 Historical Groundwater Elevation Data During the CMS Phase 3 Engineering Data Collection Study (Environeering, 2012b), transducers were placed in wells in the Pine Grove area for over one year to measure groundwater elevation variations. Transducers were placed in wells screened over residual soil and PWR (MW-5 and MW-27), fill (MW-25), or PWR (MW-16, MW-17, and MW-108). The locations of transducer wells are shown on Figure 6-3. Results of the transducer study were compared to lake level variations and are reproduced for soil and fill wells (Figure 6-4) and PWR wells (Figure 6-5). EHS Support LLC 36 Hydrogeological Conceptual Site Model Update — Badin Business Park Site Hydrogeology Note: Orange boxes indicate locations where transducers were placed. Figure 6-3 Locations of 2011-2012 Transducer Study Wells 500 0 507- ea ea Z E O O 506- W 505 - Badin Lake MW-5 5 1'` ,1^ Feb Pit 1� �� ^;\ le, ' J\ 1� �� qk � q� a` 1k c.�1 Sample Date NAVD88 = North American Vertical Datum of 1988 Feb oeS PPS Nisei so, Figure 6-4 2011-2012 Transducer Study — Soil and Fill Wells EHS Support LLC 37 Hydrogeological Conceptual Site Model Update — Badin Business Park Site Hydrogeology 510 509 E 508 ro ro 7 Z E 0 a 507 6 N W 506 505 MW-1 7 Badin Lake MW-16 .0 11 .11 r�1 .�^, ,^1 ,^2 ,12 ,^2 XL .14- 41, VP F¢o 959 �1 den �e� 9 5 SeP 06. ta°' 'CleG F� 04 956 ki0 ya' Sample Date NAVD88 = North American Vertical Datum of 1988 Figure 6-5 2011-2012 Transducer Study — PWR wells The transducer study indicated that the lake level was consistently higher than the groundwater elevation in soil and fill wells MW-5 and MW-25 and was periodically higher than groundwater at MW- 27 (Figure 6-4). The lake level was consistently higher than the groundwater elevation in PWR wells MW-16 and MW-108 and generally higher than groundwater at PWR well MW-17. At MW-17 and MW- 27, spikes in groundwater elevation above the lake level corresponded with spikes in lake level elevation. These results indicate that large-scale precipitation events lead to localized recharge that rapidly infiltrates downward and dissipates into the PWR groundwater system. It was concluded that Badin Lake may act as a flow barrier to groundwater from the former Main Plant (Environeering, 2012b). Consequently, groundwater may not discharge to the lake as depicted in the groundwater contours provided in the RFI (MFG Inc, 2001) and the 2005/2006 Facility -wide groundwater monitoring events (BHE Environmental Inc., 2005, 2006). However, it was noted in the CMS Phase 3 that this hypothesis would require additional data collection and verification (Environeering, 2012b). EHS Support LLC 38 Hydrogeological Conceptual Site Model Update — Badin Business Park Site Hydrogeology 6.5 2022 Groundwater Elevation Data As described in the 2001 RFI (MFG Inc, 2001), flow within PWR and rock can be complex due to preferential flow along fracture zones of relatively greater hydraulic conductivity. As a result, flow is not necessarily perpendicular to the groundwater elevation equipotential lines. To better constrain groundwater flow potential and directions in PWR and rock, additional PWR monitoring wells were installed in 2022 to improve the spatial coverage of the well network for understanding interactions between Badin Lake and groundwater. Groundwater elevation data for PWR and rock wells was measured in 2022 (Section 3). The results are tabulated in Attachment E. Groundwater elevations were measured at two different conditions on September 8, 2022 and October 19, 2022 to assess temporal variability in groundwater flow directions within the PWR unit. Groundwater elevations were compared to Badin Lake level data to develop groundwater contours. The data for the following monitoring wells was collected during this time but not used in contouring: • MW-110, which is screened in residual soils • MW-104 and MW-105, which are screened across unspecified soils and PWR • MW-109, which has a long (25-foot) screen that likely short-circuits different rock fracture intervals and is unrepresentative of the overall groundwater potentiometric head Historical Badin Lake level data at Badin Narrows where the lake enters the Yadkin River is available from the Cube Hydro website2. On September 8, 2022, the lake level was 509.54 feet NAVD88. On October 19, 2022, the lake level was 509.05 feet NAVD88. Notably, the lake level remains relatively constant to maximize electricity generation; therefore, large fluctuations in the lake level are not expected to affect groundwater -lake water interaction. Daily lake elevations measured between October 2017 through October 2022 at Badin Narrows reported a narrow range of elevation fluctuations between approximately 505.11 to 509.69 feet NAVD88 (excluding obvious outliers, e.g., 537.88 feet NAVD88 on October 29, 2022, which would have entirely submerged the former Main Plant and ABL). Groundwater elevation contours for the 2022 monitoring events are provided on Figure 6-6 and Figure 6-7 for September 8, 2022, and October 19, 2022, respectively. The contours are overlain with vectors that indicate the magnitude and direction of groundwater gradients. The results of both monitoring events indicate that groundwater recharge from Badin Lake in the east and higher elevations in the west converge in a narrow strip parallel to the lake shore. Note that preferential flow in PWR occurs along fracture zones of relatively greater hydraulic conductivity, and as a result, flow is not necessarily perpendicular to the groundwater elevation equipotential lines. Based on the long-term transducer study shown on Figure 6-4 and Figure 6-5, recharge from Badin Lake is expected to persist during wetter times. Changes to groundwater conditions will continue to be assessed during wetter months and in different seasons during 2023 to verify that there is constant recharge from Badin Lake. 2 http://cubecarolinas.com/lake-levels/ EHS Support LLC 39 Hydrogeological Conceptual Site Model Update — Badin Business Park Site Hydrogeology LEGEND Monitoring Well with 9/8/2022 Groundwater Elevation (Feet NAVDSS) 4 Screened Over Partially Weathered Rock (PWR) Screened Over Saprolite and Partia4ly Weathered Rock {PWR} • Lake Level 9/9/2022 (Cube Hydro) — 9/8/2022 Groundwater Elevation Contour Groundwater Flow Direction (size proportional to gradient) — West of North Flow Direction — East of North Flow Direction Figure 6-6 PWR Groundwater Elevations — September 8, 2022 EHS Support LLC 40 Hydrogeological Conceptual Site Model Update — Badin Business Park Site Hydrogeology LEGEND Monitoring Well with 10/19/2022 Groundwater Elevation (Feet NAVDSB) • Screened Dyer Partially Weathered Rock (PWR) b Screened Over Saprolite and Partially Weathered Rock PWR) • Lake Level 10/19/2022 (Cube Hydro) — 10/19/2022 Groundwater Elevation Contour Groundwater Flow Direction (size proportional to gradient) — West of North Flow Direction — East of North Flow Direction 14 1 1-1. 4 , 1 1 • r W-220 500 1,000 Figure 6-7 PWR Groundwater Elevations — October 19, 2022 EHS Support LLC 41 Hydrogeological Conceptual Site Model Update - Badin Business Park Site Hydrogeology The groundwater flow direction ultimately curves to flow from northeast to southwest and discharges primarily to the flood plain of Little Mountain Creek. This result is consistent with the elevation of the Little Mountain Creek floodplain (less than 470 feet NAVD88), which is almost 40 feet lower than the typical level of Badin Lake, and along the alignment of regional geologic structures and subsurface Facility infrastructure. Seepage Velocity Groundwater seepage velocity has previously been calculated at the ABL (Aquaterra Inc., 1991a), the former Main Plant (Geraghty & Miller, 1995), and across both areas during the RFI. In these previous estimates, various units were lumped together to arrive at Facility -wide seepage velocity values. Following the updated hydrogeological conceptualization presented herein, whereby groundwater flow is profoundly affected by the nature of specific units, seepage velocities were calculated for specific units to better understand the controls on groundwater fate and transport. Seepage velocity is calculated using the equation: Ki v=- n Where: v = seepage velocity K = hydraulic conductivity = the groundwater gradient n = effective porosity The seepage velocity result in cm/sec is converted to feet per day using standard conversion factors. The parameters used in the calculations and the results are provided in Table 6-2. Table 6-2 Seepage Velocity Calculation Parameters Lithology Hydraulic Conductivity (cm/sec) Effective Porosity (unitless) Seepage Velocity ABL (feet/day) Seepage Velocity former Main Plant (feet/day) Seepage Velocity Western Slope (feet/day) Anthropogenic Fill 1.27E-03 0.25 0.56 0.09 0.49 Native Fill 1.17E-06 0.19 6.81E-04 1.05E-04 5.93E-04 Residual Soil 2.94E-07 0.14 2.32E-04 3.57E-05 2.02E-04 Saprolite 1.93E-07 0.19 1.12E-04 1.73E-05 9.79E-05 PWR/Rock 1.25E-04 0.12 0.12 0.02 0.10 Notes: 1. Effective porosity of native fill was taken from the average of remolded sample values, and saprolite and residual soil from the average of in situ samples, given in Table 3-1. Effective porosity for PWR/Rock uses the value typical of siltstone (Johnson, 1967). Effective porosity for anthropogenic fill follows reasoning from previous studies (Aquaterra Inc., 1991a). 2. The value for hydraulic conductivity of native fill was taken from the geometric mean of remolded sample values, and saprolite and residual soil from the geometric mean of in situ samples, given in Table 3-1. Hydraulic conductivity values for anthropogenic fill and PWR were obtained from Table 6-1. EHS Support LLC 42 Hydrogeological Conceptual Site Model Update — Badin Business Park Site Hydrogeology 3. Groundwater gradient was calculated from the groundwater elevations on Figure 6-6 (ABL-MW-6 to PZ-18RD at the ABL is 0.039 Feet per foot (ft/ft); MW-220 to MW-208 at former Main Plant is 0.006 ft/ft; MW-219 to MW-32 for western slope is 0.034 ft/ft). 4. Vertical hydraulic conductivity was measured on saprolite and residual soil; these values are assumed to equal horizontal hydraulic conductivity. 5. Calculated velocities assume the same gradient across lithologic units, and this condition is expected to vary slightly. Forthcoming groundwater elevation data will provide the necessary input for future revisions. ABL = Alcoa Badin Landfill cm/sec = centimeters per second PWR = partially weathered rock As indicated on Table 6-2, seepage velocities are two to three orders of magnitude lower for native fill, saprolite, and residual soil compared to anthropogenic fill and PWR/Rock. Indeed, the PWR/Rock estimate is likely biased low as effective porosity in fractured rocks can be as low as 1 percent (Worthington, 2022), and use of a lower effective porosity value would increase the calculated seepage velocity an order of magnitude. Seepage velocities are higher where the groundwater gradient is steeper (ABL and slope west of the Main Plant). These results support the conclusion that PWR is the primary conduit for groundwater flow at the Facility, as it is extensively present and has high calculated seepage velocities compared to native soils and fill derived from them. In contrast, anthropogenic fill has high seepage velocities but is present only in discrete areas. Seepage into or out of anthropogenic fill is limited by the presence of underlying saprolite and residual soils, and groundwater flow is controlled by areas where it is in direct contact with PWR. EHS Support LLC 43 Hydrogeological Conceptual Site Model Update — Badin Business Park Geochemistry 7 Geochemistry A combination of vertical groundwater gradients, groundwater flow primarily through PWR and fractured rock, and geochemical attenuation appear to be the primary controls on plume geometry at the former Main Plant. This section summarizes historical data on the distribution of the primary COIs — fluoride and available cyanide in groundwater at the former Main Plant and ABL — along with a preliminary evaluation of geochemical controls on COI attenuation to support this HCSM document. A full description of the current understanding of all COI distributions is provided in the CMS Phase 3 Report (Environeering Inc., 2012b), and is not reproduced here. Investigations following the CMS work have focused on assessing COI distributions in discrete areas; TCE distributions in the northern area of the former Main Plant (Environeering, 2018a); and PCB, PAH, fluoride, and cyanide distributions in surface water and sediment downgradient of the ABL (Environeering, 2018c; Civil Environmental Consultants [CEC], 2020). Facility -wide groundwater sampling events were conducted at the ABL and former Main Plant during the RFI in September and October 1999 (MFG Inc, 2001); at the former Main Plant in August 2011 (BHE Environmental Inc., 2011) and June 2006 (BHE Environmental Inc., 2006); and during the CMS Phase 3 in June 2011 (Environeering Inc., 2012b). Planning is currently underway for a Facility -wide groundwater sampling event. Based on the magnitude of remedial activities conducted at the Facility, it is anticipated that the current groundwater concentrations will look significantly different to the historical data described below. Nature and Extent of Groundwater Fluoride and Cyanide Impacts Fluoride concentrations in groundwater at the ABL reported in the CMS Phase 3 report (Environeering Inc., 2012b) identified total fluoride exceeding the NC 2L standard only in piezometers screened within ABL waste materials (ABL-PZ-15 through ABL-PZ-19) (Environeering, 2012b). Fluoride has not previously been detected above the NC 2L standard in any perimeter groundwater monitoring well surrounding the ABL (MW-1 through MW-6). Subsequent quarterly sampling of the perimeter wells over four quarters (July 11, 2018; October 30, 2018; January 31, 2019; and April 11, 2019) did not identify fluoride above the NC 2L standard in any perimeter well (Environeering, 2019). As discussed in Section 7.2.2, fluoride -bearing surface water was identified in the eastern drainage ditch located on the floodplain of Little Mountain Creek and interpreted to originate from upwelling groundwater. However, concentrations decreased and were below NC 2L standards in the sample collected closest to Little Mountain Creek (Environeering, 2018c). Fluoride has historically been detected above NC 2L groundwater standards in the former Main Plant in the vicinity of the On -Site Landfill and the West Fill Area. Fluoride concentration contours in groundwater at the former Main Plant are presented in the 2012 CMS Phase 3 study (Environeering Inc, 2012b) and are reproduced on Figure 7-1. The distribution of fluoride and cyanide impacts in groundwater reflect contributions from multiple sources, particularly in the northern area of the Facility where numerous SWMUs have historically been identified. EHS Support LLC 44 Hydrogeological Conceptual Site Model Update - Badin Business Park Geochemistry MW-28 0.030 J n gIL• MW-11 4.51 milyr.,4 MW-19 •4.464 mglL MW-18 • 0,040 MW-109e"-" 14 mg -17 27 0.03 J mglL • '141W-108 o .. 7 rngIL • -1 • MW-i0 0.020J m• i mg/L 52rr L 0 6.4 • SF-5 BF-2 0.40 Ing/L• O. 2 mg?L -102 • .mg!L Source: Environeering. 2012b. Phase 3 - Engineering Data Collection for the Corrective Measures Study. Badin Works Facility, Badin, North Carolina. October 31. Figure 7-1 Fluoride Concentration Contours in Groundwater (2011) Available cyanide concentrations in groundwater at the ABL reported in the CMS Phase 3 Report only EHS Support LLC 45 Hydrogeological Conceptual Site Model Update — Badin Business Park Geochemistry detected available cyanide in groundwater at piezometers screened within the waste materials at the ABL (ABL-PZ-16 and ABL-PZ-18), and on the floodplain of Little Mountain Creek (ABL-MW-5) (Environeering, 2012b). All detected available cyanide concentrations in perimeter groundwater monitoring wells were below the NC 2L groundwater standard. Subsequent quarterly sampling of the perimeter wells over four quarters (July 11, 2018; October 30, 2018; January 31, 2019; and April 11, 2019) did not identify available cyanide above the NC 2L standard in any perimeter well (Environeering, 2019). Total cyanide, which does not have an NC 2L groundwater standard, was detected in MW-4 and MW-5 during all four quarters. As discussed in Section 7.2.2, total cyanide was detected in surface water in the eastern drainage ditch located on the floodplain of Little Mountain Creek and interpreted to originate from upwelling groundwater. Total cyanide concentrations were above NCAC Rule 2B fresh surface water quality standards (NCAC 2B) in all three surface water samples (Environeering, 2018c). However, total cyanide was not detected above NCAC 2B surface water standards in surface water samples from Little Mountain Creek. Available cyanide was detected above NC 2L groundwater standards in the former Main Plant in the vicinity of the On -Site Landfill and the West Fill Area in 2011 (Environeering, 2012b). Available cyanide concentration contours in groundwater at the former Main Plant presented in the 2012 CMS Phase 3 study (Environeering Inc, 2012b) are reproduced on Figure 7-2. EHS Support LLC 46 Hydrogeological Conceptual Site Model Update — Badin Business Park Geochemistry ®n.site MW-18 • <0.0018 mg/L MW-109 £ 0.0210 rtag�L.- ._ MVU-16 •0.0340 rngIL 4 0.22 m M-11 - .■ 0_00Th. mglL MW 23' 1.4 frlg/L 0.011• ,,,,,,51 0.58 m.g, L • MW5 { =0018 mglL PAVV-15. <0.0018 mgrL• • hN 14 MW-10 • i0vsii,00i8 *g/L •<O.fl,018 mylL M 8 MW-29 BF-2 R Ii. MW-7 <0_o01B mg/L. <0.0018 mg/L• 0_70 m9/L •< 018 mglL hi BF-5, <0.0018 ,flg/L• • B F-3 MW-103 .c0.0018 rngli_• • ' Data source: Environeering (2012b) BF-7 <0.0018 mgll • {D_DD1?. mg/L. MW-105 I' 1 <0.0018 mg1L • MVV-102 • <0.0018 rrtglL 390 rngfL Grove • MW-17 <0.0018 mgiL MW-108 • «Q0018 mg/L Figure 7-2 Available Cyanide Concentration Contours in Groundwater (2011) As indicated on Figure 7-1, fluoride concentrations decrease by two to three orders of magnitude between the On -Site Landfill and Badin Lake. A large decrease in concentrations is also observed for EHS Support LLC 47 Hydrogeological Conceptual Site Model Update — Badin Business Park Geochemistry available cyanide (Figure 7-2). The order of magnitude decreases in fluoride and available cyanide concentrations between source areas and the shore of Badin Lake is consistent with lake water recharging and mixing with groundwater and lowering COI concentrations and then migrating to the south (away from the Lake). Note that these contours are drawn lumping together fill and native soil wells, and are intended to illustrate the hydrogeological and geochemical attenuation mechanisms operating at the Main Plant. Overall, lake water and areas of groundwater recharged by precipitation are buffered at low pH values due to the reaction with atmospheric carbon dioxide, which is common for similarly low alkalinity waters (Tailing, 2010). In contrast, areas where groundwater is or has been in contact with SPL typically have high (alkaline) pH values (Randell Environmental Consulting, 2016). pH values of groundwater at the former Main Plant were measured during the CMS Phase 3 work (Environeering Inc, 2012b) and the results were contoured and presented on Figure 7-3. Areas where the pH is above approximately 8.0 standard units correspond to where fluoride and available cyanide are highest, in and around the On - Site Landfill. EHS Support LLC 48 Hydrogeological Conceptual Site Model Update — Badin Business Park Geochemistry Source: Environeering. 2012b. Phase 3 - Engineering Data Collection for the Corrective Measures Study. Badin Works Facility, Badin, North Carolina. October 31. Figure 7-3 pH Contours for Groundwater (2011) EHS Support LLC 49 Hydrogeological Conceptual Site Model Update — Badin Business Park Geochemistry To better understand geochemical controls on the orders of magnitude decrease in fluoride concentrations over small distances at the former Main Plant, the Geochemists' Workbench° (GWB) software application Act2 was used to demonstrate equilibrium constraints on mineral solubility that control fluoride concentrations in groundwater (Figure 7-4). Above a pH of about 8 standard units, calcite3 replaces fluorite as the stable calcium phase, and there is no theoretical limit on fluoride concentrations in groundwater contacting SPL because calcite does not contain fluoride in its structure (i.e., calcite = CaCO3). Below a pH of about 8 standard units, calcium is replaced by fluorite as the stable calcium mineral phase. The mineral fluorite does contain fluoride in its structure (i.e. fluorite = CaF2) , and limits the maximum possible fluoride concentration at equilibrium (McMahon et al., 2020). There are different variables to this model that would result in different fluoride concentrations in equilibrium with fluorite, but the key point is that at near -neutral pH and with sufficient calcium, maximum fluoride concentrations (mg/L) in groundwater are limited by mineral solubility. 0 — 1 — 2 — 3 — 7 — 8 — 9 0.75 mgJL rite 1.3 mgfL 3.2 mgfL Ca++ Calcite CaCO3 25°C —100 2 4 6 8 10 12 14 pH Notes: Log a Ca" = logarithm of calcium activity; equivalent to the logarithm of calcium concentration in units of moles per liter at low dissolved solids. Blue shading indicates conditions where minerals do not precipitate. Orange shading indicates conditions where fluoride concentrations are controlled by mineral precipitation. Black lines indicate expected fluoride concentrations (in milligrams per liter [mg/L]) buffered by fluorite precipitation under a specific scenario. Figure 7-4 pH Dependence of Fluoride Mineral Solubility Based on this model, fluoride concentrations above single digit to low double digit concentrations can only persist in high pH waters, or acidic waters. Mixing between high pH groundwater with elevated fluoride and low pH groundwater sourced from Badin Lake would shift pH conditions into the fluorite 3 Calcite is used in this GWB model, but other common carbonate minerals could play a similar role (e.g., siderite, dolomite, or huntite). EHS Support LLC 50 Hydrogeological Conceptual Site Model Update — Badin Business Park Geochemistry stability range shown on Figure 7-4, leading to fluoride attenuation. Additionally, mixing with lake water would also lead to lower fluoride concentrations. Consequently, the high fluoride concentration gradient shown on Figure 7-1 may be explained by geochemical attenuation by mineralization and mixing between Badin Lake water and former Main Plant groundwater. Cyanide solubility is also strongly affected by pH. The solubility of cyanide -contaminated soils is highest at high pH values and lowest at more acidic (lower) pH values (Ghosh et al., 2004). Therefore, mixing across a pH gradient is also expected to affect available cyanide concentrations through geochemical attenuation processes. In addition to mixing and geochemical attenuation lowering cyanide and fluoride concentrations, groundwater migration from anthropogenic and industrial fill areas in the northern portion of the former Main Plant is limited by the geologic conditions. The isolated areas of fill materials are generally underlain or surrounded by native saprolite and residual soil or fill derived from these materials. COIs are rapidly attenuated in the isolated areas where the fill is in communication with the PWR system through the geochemical processes described above. 7.2 Surface Water 7.2.1 Badin Lake During the CMS Phase 3 study (Environeering, 2012b), surface water temperature and conductivity measurements were made along the shoreline of Badin Lake to identify if groundwater seeps were present. No groundwater seeps were identified. Surface water samples were then collected from seven locations along the shoreline of Badin Lake. The sampling location map (Figure 3-20 [Environeering, 2012b]) is provided as Figure 7-5. Grab samples were analyzed for free cyanide, fluoride, TCE, PCBs, PAHs, and standard field parameters (i.e., pH, specific conductivity, dissolved oxygen, temperature, turbidity, and ORP). The monitoring was conducted in November 2011 and again in May 2012. EHS Support LLC 51 Hydrogeological Conceptual Site Model Update — Badin Business Park Geochemistry FIGURE 3-20 IN LAKE AT ALCOA BASIN WORKS SURFACE WATER SAMPLING LOCATION MAP Source: Environeering. 2012b. Phase 3 - Engineering Data Collection for the Corrective Measures Study. Badin Works Facility, Badin, North Carolina. October 31. Figure 7-5 2011 and 2012 Badin Lake Surface Water Samples The November 2011 results identified fluoride in the laboratory method blank, and samples from this period were noted with a "B" qualifier by the lab. It is believed that the reported value is the result of a laboratory artifact; it also noted that the reported values of 0.090 to 0.13 mg/L are typical of background surface and groundwater fluoride concentrations in the United States (McMahon et al., 2020). Fluoride was not detected in the subsequent sampling event in May 2012. Free cyanide, TCE, PAHs, and PCBs were not detected in the November 2011 and May 2012 sampling events. The Badin Lake surface water analytical results are provided in the CMS Phase 3 report (Table 3-6 of Environeering, 2012b). EHS Support LLC 52 Hydrogeological Conceptual Site Model Update — Badin Business Park Geochemistry The surface water results provide an additional line of evidence that Badin Lake is a losing water body that is contributing to groundwater recharge beneath the Facility. 7.2.2 Little Mountain Creek From January 6, 1997 through January 4, 2001, monthly surface water samples were collected from Little Mountain Creek at points upstream and downstream of the ABL and analyzed for total cyanide, free cyanide, and fluoride. Results are provided in the 2001 RFI (MFG, 2001). Total cyanide was below the detection limit in all upstream samples and exceeded NC 02B surface water quality standards nine times in the downstream samples. Available cyanide exceeded standards two times in the upstream samples and three times in the downstream samples. Fluoride was below standards in all samples and exceeded standards three times in the downstream samples. Of the most recent samples from this dataset (January 2000 through January 2001), only total cyanide exceeded standards in a single sampling event. During the 2001 RFI, no COIs were detected at concentrations exceeding applicable human health screening values in Little Mountain Creek (MFG Inc, 2001). During the CMS Phase 3 study (Environeering, 2012b), a surface water sample was collected from Little Mountain Creek in November 2011 and analyzed for available cyanide, fluoride, TCE, PAHs, and PCBs. Similar to the Badin Lake surface water sample, fluoride was detected in the laboratory method blank sample and the concentration was attributed to a laboratory artifact. Consistent with the RFI (MFG Inc, 2001), available cyanide, TCE, PAHs, and PCBs were not detected in the November 2011 sample from Little Mountain Creek. To address the January 23, 2017 NCDEQ request for additional investigation downgradient of the ABL (NCDEQ, 2017), and to assess the variation on constituent levels in Little Mountain Creek as intended by the instream monitoring study requirements of the September 29, 2017 Final NPDES Permit Renewal (Condition A. [8]), five surface water samples were collected from Little Mountain Creek (Environeering, 2018c). Fluoride was below NCAC 2B standards in all samples, and total cyanide was not detected in any sample. The sum of the detected PCB congener concentrations was reported above the NCAC 2B criteria of one part per trillion in one location; however, congeners were not detected in the duplicate sample. One sample and the associated duplicate sample contained concentrations of total PAHs exceeding NCAC 2B standards. As part of the same effort, two sediment samples were collected from Little Mountain Creek and analyzed for PCBs and PAHs; results did not exceed the applicable screening criteria (Environeering, 2018c). Subsequent confirmation sampling of Little Mountain Creek surface water and analysis for PCB congeners and PAHs from the location where the detections occurred did not identify any constituents above the primary or duplicate sample that was collected (Badin Business Park LLC, 2019). The most recent sampling events suggest that conditions in Little Mountain Creek have improved, and current conditions will be assessed during the forthcoming baseline ecological risk evaluation study. Notably, operation of the ABL corrective measures have likely improved conditions since the 2018 sampling, as described in Section 9.1. EHS Support LLC 53 Hydrogeological Conceptual Site Model Update — Badin Business Park Stormwater System 8 Stormwater System Periodic exceedances of fluoride above the NPDES permitted levels have occurred at outfall 005. Subsequent studies have identified that impacted groundwater was entering the storm sewer system with a number of potential sources, including residuals in soils and the PWR and flux from the West Fill Area, identified as contributing to the detections of fluoride at Outfall 005. The layout of the storm system is shown on Figure 8-1. Stormwater pipes indicated with blue lines. Shallow stormwater system indicated with orange lines. Manholes indicated with red dots and labeled with number designations. Figure 8-1 Stormwater System The interaction of the storm sewer system with groundwater at the former Main Plant was assessed in 2006 (BHE Environmental Inc., 2006). In the study, measured groundwater elevations were compared to storm sewer pipe invert elevations to identify where the groundwater potential was sufficient to enter the storm sewer system. Since groundwater at the former Main Plant is confined within PWR, the analysis was repeated to assess where the stormwater system intersects the PWR; results are provided in Section 8.2. Further efforts to locate where stormwater is entering the stormwater system included a EHS Support LLC 54 Hydrogeological Conceptual Site Model Update — Badin Business Park Stormwater System camera study in September 2015 to visually identify areas where groundwater is infiltrating the stormwater system that feeds into Outfall 005. Subsequent efforts focused on defining groundwater fluoride or cyanide concentrations in the West Fill and downgradient areas, along with track down studies of fluoride and cyanide concentrations in the stormwater system. Mitigation initiatives included upgrades to the stormwater system through construction of a shallow piping system as part of a special order by consent dated July 2, 2018. Additionally, portions of the aged stormwater pipe were grouted in 2019, the pipe was isolated with brick headers, and a slurry wall was installed to mitigate groundwater infiltration to the storm system. An electrical conductivity survey was subsequently performed to identify the effects of mitigation measures on groundwater migration. This section describes the concentrations identified at Outfall 005 that are driving the stormwater assessment activities and the results of the measures taken. This section also provides an updated conceptualization of groundwater interaction with the stormwater conveyance system, which has been informed by the recent hydrogeologic data and conceptualization provided in this report. 8.1 Outfall 005 Concentrations of fluoride at Outfall 005 and manhole (MH) 2.050 (locations shown on Figure 8-1) were measured over several days in December 2019 (Figure 8-2). On December 11, 2019, about 0.5 cumulative inches of rain fell. On December 13, 2019, about 1.75 cumulative inches of rain fell. Fluoride concentrations were lower on December 13 than on December 11 in both locations, but the concentration decreased more in Outfall 005 than in MH 2.050. MH 2.050 was also found to have a more consistent flow rate during the rain events than Outfall 005. Therefore, the high -fluoride water from MH 2.050 was diluted more at Outfall 005 during the stronger rain event. Based on this data, it was concluded that the source of fluoride at Outfall 005 is the baseflow of groundwater in the system and not mobilization of fluoride from other sources by precipitation. Furthermore, removing high -fluoride water from MH 2.050 or blending water with a clean water source (from stormwater, groundwater, or some other source) were identified as possible options for achieving compliance at Outfall 005. EHS Support LLC 55 Hydrogeological Conceptual Site Model Update — Badin Business Park Stormwater System 12/11/19 12/13/19 Lower Rainfall Data High Rainfall Data Manhole 2.050 Outfall 005 Data estimated from Badin Business Park Outfall 005 Compliance Management Update Presentation, January 24, 2020 mg/L = milligrams per liter Figure 8-2 Fluoride Concentrations Measured at Outfall 005 and MH 2.050 During December 2019 Sampling Event Between March 2010 and January 2020, the fluoride concentration in Outfall 005 was below the compliance level of 1.8 mg/L in 10 of the 142 months when data was reported (Figure 8-3). Concentrations greater than 5 mg/L were observed before 2016, but since 2018 (area highlighted by the box in Figure 8-3), concentrations have consistently been below 3.5 mg/L (Figure 8-3). Notably, concentrations shown on Figure 8-3 decreased significantly following measures in 2019 to plug and inhibit stormwater movement northeast of the former potlines and downflow of MH 2.600. Note, the recent period of record indicated on Figure 8-3 is provided in more detail on Figure 8-4. EHS Support LLC 56 Hydrogeological Conceptual Site Model Update — Badin Business Park Stormwater System 20 J CD N Q u 10 0 00 .00 --0_-0 0 0 0 0 0 0 0 0 0 0 p ° o 0 mobni�p 0 0 °m 0 � vBpV Q000000 OJCLOO o� °% o 0 1.8 mg/L Compliance Level 0 0 c8 ° 2011 mg/L = milligrams per liter 3- 0 2013 2015 2017 Month 2019 2021 Red circles: Reported average fluoride concentration Black circles: Reported maximum fluoride concentration Black box: Recent period of record Figure 8-3 Fluoride Compliance at Outfall 005 0 0 0 0 0 0 0 ° 0 0 0 0 0 0 0 ° 0 0 0 0 0 1.8 mg/L Compliance Level O 0 0 0 0 0 ° 0 0 0 0 0 0 0--e-------0- 0 O 0 O ° 0 0 8 0 0 0 O 0 0 8 07-2018 mg/L = milligrams per liter Figure 8-4 04-2019 01-2020 Month 10-2020 07-2021 04-2022 Red circles: Reported average fluoride concentration Black circles: Reported maximum fluoride concentration Fluoride Compliance 2018 Through January 2022 at Outfall 005 EHS Support LLC 57 Hydrogeological Conceptual Site Model Update — Badin Business Park Stormwater System 8.2 Stormwater System — Groundwater Interaction During excavation and plugging activities southwest of MH 2.600 in 2019, it was observed that pipe bedding may not have been used during the original installation of the stormwater infrastructure and that native fill materials were likely used instead in many locations. Consequently, the fill material surrounding the pipe does not likely provide a substantial preferential flow pathway for groundwater, which is supported by the absence of bends in groundwater equipotential lines around the stormwater infrastructure. Based on boring logs for wells MW-103 and MW-220 in the former Main Plant, groundwater was encountered within PWR or rock and was confined beneath the approximately 10- to 12-foot-thick veneer of clayey fill. Subsequent water levels measured in the wells were above the PWR/Rock interface with overlying fill. To better identify where groundwater is entering the stormwater system, locations where the stormwater pipe intersects PWR were assessed. Assessing the interface provides a more accurate measure of where groundwater enters the stormwater system than using the groundwater elevation, given that groundwater is confined and located within the PWR or rock and may appear artificially high. The depth to PWR shown on Figure 5-5 was converted to the PWR elevation and compared to the stormwater pipe invert elevations. The result is shown on Figure 8-5 and corresponds to areas where there are observed increases in fluoride concentrations within the storm sewer. EHS Support LLC 58 Hydrogeological Conceptual Site Model Update — Badin Business Park Stormwater System LEG EN D - Stormwater Pipes • 5tormwa ter Manholes o NPDES Outfalls Storm Sewer Invert Intercept PWR Utility Invert Elevations feet NAVDS8 <=510 1.1 510-513 MI 513 - 515 515 - 516 516 - 517 517 - 518 518 - 519 Q 519 - 522 522 - 533 >533 I I I I I I I I wood t`i17R-3nylS agGii 6.200 !, r5 gimp Pipe 6.92E 2 200. 2.201' 1.111 11.330 1 2.120 2'34. 2110 6-oa0 2.oso tFail 00S C 8.525 INLET MN 8.300 INLET MH 11113FALL AT LANE Grove 0ulfall 011 and 012 e.403.IN1 FT Mil 8.500INLET MH ¶T.200 INLET MH a. Da) INLET MH 6.200NLEr MH' OIL SEPARATOR Y "' PL•_F MH W1E 7.OINiET 3t001NLE1 MH 9.000INLLi MH 2:730 2.610 2.611 5 PIPE W EST f /rr731 � •43500 r MP )''"`33WEFtyEHTSAMPLE MHO 0040IOW METFFINr550-E 4.000 1.600 3_200 1.521 4.030' CC* PCB eao gem ecm 207, WEE FLOW ME TERN. t 2 NAVD88 = North American Vertical Datum 1988 NPDES = National Pollutant Discharge Elimination System Figure 8-5 PWR Elevation Compared to Storm and Sanitary Pipe Invert Elevations Figure 8-5 shows locations where stormwater infrastructure intercepts PWR. Three main areas are identified: • Immediately downgradient of the West Fill area between MH 2.700 and MH 2.510 • Between MH 2.400 and MH 2.210 • Between MH 2.000 and MH 2.050 EHS Support LLC 59 Hydrogeological Conceptual Site Model Update — Badin Business Park Stormwater System Whereas the stormwater pipe intersects PWR in the section of pipe between MH 6.020 and MH 6.921, fluoride -impacted groundwater is not believed to be entering the system in this section of pipe due to fluoride concentrations measured during stormwater track down studies (Section 8.3). 8.3 Track Down Analytical Data Grab water samples were collected from MHs along the stormwater conveyance that feeds into Outfall 005 at five different times in 2019' to identify the times and locations where fluoride and cyanide were entering the stormwater piping. Sampling locations and the range of analytical results are shown on Figure 8-6. Note that a concentration of 24.9 mg/L fluoride was measured in MH 2.200 in September 2019, whereas all previous samples in 2019 and subsequent samples in 2021 were within a range of 2.7 to 4.7 mg/L. Given that no groundwater or other source within the stormwater system has a similarly high reported concentration, this value is considered suspect. Also, in September 2019, the pipe was dry upstream at MH 2.510 and dry downstream at MH 2.100 and MH 2.000, suggesting any water in the intervening space was stagnant and arrived from an upstream location (such as from between MH 2.400 and MH 2.210) at an earlier time and may have concentrated due to evaporation. 950 900t 2.020 2.9m2s mgh 0,0226t12 0,017 046 C 6.000 1910 2.7 mglLF 003210 011 marl CN 0,7617 New LS O,CC<ro C... rtylL CN 2 2'0 10044 ioo ss ��W�crr- ,..210: 2200 3020 2d9,1, =00023 to 0. 16 mg0.CN L 2. 10 2 to 8.2 mgILF 0.13100.4 mg(LC CN = cyanide F = fluoride mg/L = milligrams per liter Figure 8-6 2019 Fluoride and Cyanide Track Down Study Results In March and April 2021, grab samples were again collected from MHs along the stormwater conveyance that feed into Outfall 005, from groundwater monitoring wells located in the flat area of the February 7, March 13, March 27, May 6, and September 19. EHS Support LLC 60 Hydrogeological Conceptual Site Model Update — Badin Business Park Stormwater System former Main Plant (FO-02, BF-5, MW-31, and MW-103) and monitoring wells in the West Fill area (MW- 29, MW-33, MW-35, MW-37, MW-39, and MW-46) using low -flow techniques. Grab samples were also collected from five temporary wells (TW001 through TW005) installed to intercept groundwater, a seep that developed at the base of the embankment east of the West Fill area, and two sumps installed to manage the water (North Sump and South Sump). Sampling locations and analytical results are shown on Figure 8-7. Also shown on Figure 8-7 are analytical results for groundwater samples collected and analyzed in 2022 (Section 3). MW F0-02003012020 0.11 mg/ F m00079nglLCN MW-103 (303.020 a0078 .00078 mg1L CN BOW (6117/202.2J .0040 np2 F <0.0020Og4. 0303(811712022) .0.0040 mg/L F <0.0020 mgil C 2100 2.1 r1g1"•- 1 2210 z 6.000 27 mgLF ]]1]mAOO(3/1712021)9LC 26mg2F 23mat F 0.37m90.F �..e0092 mgiLCll ^� �0 OO60 mg�L Cut--_0005]mgIL CN 0dfi9 m.ILC v ' u0e. 005(30172021) 2.1 mg1LF 0.028 mg1L CN 0.04610&L CN-D.02C7=n p•L CN MW.104{313012020. 1 6 mg/L F m.00079 mg1L CN 8302 (811712022) .0 0040 mgll F N.0020 m4R C 13.300 (8(17/2022) <0.040 'MI F 02.0020 m0h C MN0.33(1115F2021) 44 mghF 0,421CN 2.516 (31162021 1 mgh-F 0.018 mg/LCN TWO. (M1312021 CS mot F 0076 mg1L CN 7WOm(411312021 8-S mar 0.092 oral CN South Sump (31101202 43 mg1LF 007 moll_ CN 2300 (81112022) 0.042 np0L F W.0020 mg4 C MW-216 (6/1312022 =.0040 mg& F .0--0020 MA CN MWJ919222021 ..040 mgll. F .0 0020 mgh CN 14W-219(0/1.02) 0075 mg,F .0.0020 mg, CN W-77 (32212021 00 mg/ F LCN MW 51!OIL 21 38 mgIL 00 F 2.9 mg. CN MW-29(3/1512021 13 mg'LF 12 mglL CN MW-30(31222021) fi3 rag1L F 0066 mg1L CN -Wes1 FM Area Seep (3l1 &2021) TW005(41101202'),� 11 m711.00 1.2r044_F 0.047 mg/CN W.0625, 0001 2114128ump(311612021 mgILF 0.032 mgIL CN CN = cyanide F = fluoride mg/L = milligrams per liter Figure 8-7 2021 Fluoride and Cyanide Track Down Study Results Samples were collected using clean disposable sampling equipment and placed into laboratory -provided sample bottles. Samples were collected under chain of custody protocols and submitted to North Carolina -certified analytical laboratory for analysis (Eurofins of Savannah, Georgia). Samples were analyzed for fluoride by USEPA Method 300.0 and total cyanide by Method 9012B. Laboratory analytical results are provided in Attachment G. The following summarizes the spatial distribution of analytical results: • Analytical results identify groundwater samples collected upgradient (west) of the West Fill Area as below the method detection limit for fluoride and cyanide (B300 through B303, B305, MW- 218, and MW-39). Fluoride was detected at low levels and below the NC 2L groundwater standard in MW-219, and total cyanide was not detected. EHS Support LLC 61 Hydrogeological Conceptual Site Model Update — Badin Business Park Stormwater System • Samples from monitoring wells installed in or immediately downgradient (east) of waste material at the West Fill Area had groundwater fluoride concentrations of 6.3 to 100 mg/L and cyanide of 0.21 to 12 mg/L. • At the base of the embankment adjacent to the West Fill Area, groundwater fluoride concentrations ranged from 1.2 mg/L to 11 mg/L, and total cyanide ranged from below the detection limit to 0.092 mg/L (TW001 through TW005, south sump, north sump, West Fill area seep, and BF-5). • For groundwater further downgradient, total cyanide was below the detection limit in all groundwater samples and fluoride was below the NC 2L standard in all samples (FO-02, BF-5, MW-31, and MW-103). • Within the stormwater conveyance system, fluoride and total cyanide concentrations were lower than groundwater at the base of the West Fill Area embankment but higher than groundwater at FO-02, BF-5, MW-31, and MW-103. There is a notable increase in fluoride between MH 2.400 and MH 2.210 in 2019 and between MH 2.510 and MH 2.210 in 2021. This stretch of the stormwater system coincides with an area where the stormwater system intersects PWR (Figure 8-5). Track down analytical results, along with the identification of where the stormwater conveyance intercepts PWR, are consistent with the camera study, which identified groundwater infiltrating the pipe downstream of MH 2.400 and standing water in the pipe between MH 2.320 and MH 2.330. To summarize, groundwater fluoride and cyanide concentrations increase from non -detect to elevated concentrations as groundwater moves past the West Fill Area. This is possible because the West Fill Area was developed in a historical ravine. Saprolite is only a few inches thick (MW-34, MW-37, MW-39) or absent (MW-38) at the base of the ravine and was likely eroded by natural processes prior to plant development in this location or was possibly excavated during Facility development and operations. The CMS Phase 3 Report (Environeering, 2012b) describes this ravine as being filled during plant expansion and modernization with native soils and incidental amounts of plant process remnants. Groundwater confined within the PWR moves vertically upward into overlying fill material where native soils were naturally eroded. The geologic setting provides a mechanism for the formation of a seep at the base of the West Fill embankment and for impacted groundwater to mix with cleaner groundwater on the flat area of the former Main Plant where concentrations decrease. Impacted groundwater enters the stormwater system in this general area (northeast of MH 2.510). This is the general area where the pipe was cemented and plugged in 2019, which led to improvements in fluoride concentrations observed at Outfall 005. Increases in fluoride in stormwater within the conveyance system indicate impacted groundwater is entering the system between MH 2.510 and MH 2.210 in an area where the pipe intersects groundwater within PWR. This overall conceptualization is summarized on Figure 8-8. EHS Support LLC 62 Hydrogeological Conceptual Site Model Update — Badin Business Park Stormwater System Legend: F = fluoride mg/L = milligrams per liter ND = non -detect PWR = partially weathered rock TCN = total cyanide Temp. = temporary Groundwater flow on hillside is topographically driven within PWR Groundwater confined within PWR by overlying saprolite Manhole 2.400 F=2.3 to 2 8 mg/L Manhole 2.200 Tcn=0.005I to U. 13 met F=2.3 to 24.9 mg/L TCN O0052 to 0.18 mgfL Manhole 2.050 F=2. 1 to 2.6 mg/L TCN=0,1:1125 to 0 028 mg/L Little Mountain Creek Flood Plain Groundwater recharged by precipitation Manhole 2.510 F. Dry to 1.1 mei_ TCNDry to 0. 046 mg/L Storm Sewer to Outfall 005 Saprolite and soil eroded in valley (now filled) Groundwater encounters fill and waste where saprolite is thin or completely absent (e.g. MW-38, MW-39) Temp. wells f=1. 2 tb 6.8 mgeL TCN=a0.002 to 0.092 rrg/L Out -Fall 005 (2018 to 2021) F-ND to 3.5 mg/L Groundwater enters storm sewer pipe joints where invert intersects groundwater Figure 8-8 Conceptual Summary of Impacts Entering the Outfall 005 Stormwater Conveyance System EHS Support LLC 63 Hydrogeological Conceptual Site Model Update — Badin Business Park ABL-Specific Hydrogeology and Efficacy of ABL Corrective Measures 9 ABL-Specific Hydrogeology and Efficacy of ABL Corrective Measures The geology in the ABL area is generally similar to the former Main Plant and consists of a PWR groundwater flow system that is recharged from the direction of the former Main Plant and from the slope to the west. Before waste was placed, there was a bifurcated valley underlain by several feet of saprolite soils, followed by PWR, and fractured rock based on boring logs and cross sections from the RFI and CMS Phase 3 reports (MFG Inc, 2011 and Environeering, 2012b, respectively). Historical aerial photos do not indicate any disturbance of this surface before placing municipal refuse, process material, and native soils, and subsequent capping, which raised the ground surface from 13 to 42 feet (Environeering, 2012b). A geologic cross section of the ABL from the 2001 RFI (MFG Inc, 2001) is provided as Figure 9-1. LEGEND Borehole Monitoring Well Screen/ Well Production Zone Notes: 1. Red wells are no longer present. Northeast A Maximum/Minimum groundwater (CMS Phase 3, 2011/2012) a N N N FII ■ g Residual Soil ■ £ 8 Saprolite ■ Partially Weathered Rock M Fractured Rock ■ G N d w 0 Ground Surface 1913 I I I Ground Surface Present Day o ry 1009 Distance (feet) Figure 9-1 ABL Cross -Section Southwest A' 2000 is Partially Weathered Rock` Vertical Exaggeration =10x The ABL was rough graded in 1980 using available on -site soils and was seeded with grass. In October 1997, the ABL surface was regraded to control run-off and establish a slope suitable for mowing. A new cover system was established over the landfill area comprising 12 inches of silty clay soil, compacted to 95 percent relative density, overlain by a 6-inch vegetative layer consisting of silty clay soil combined with lime and fertilizer. Run-on from high areas was managed by installing both lined and unlined ditches along the flanks of the ABL that are keyed into saprolitic soils and discharge clean water (water coming onto the Facility) to the flood plain of Little Mountain Creek. These ditches also receive runoff from adjacent slopes, which include two electrical substations. A subsequent investigation identified waste beneath an adjacent Alcoa Power and Generating, Inc. high voltage electrical substation (Environeering, 2008). EHS Support LLC 64 Hydrogeological Conceptual Site Model Update — Badin Business Park ABL-Specific Hydrogeology and Efficacy of ABL Corrective Measures Geology at the toe of the ABL differs on the floodplain of Little Mountain Creek, where fluvial processes eroded and thinned residual soils and saprolite and deposited alluvial sediments on the resulting surface. Alluvial sediments were historically identified in the boring logs for ABL-MW-3, ABL-MW-4, ABL- MW-5, and ABL-PZ-3S, and in the soil profile at PZ18RD during drilling in 2022. The alluvial soils consist of organic silt and clay with pebble to cobble -sized rock fragments and roots in places. The alluvial soils are generally described as wet to saturated and underlain by residual soil and hard, dry saprolite. No wells are exclusively screened in alluvial soils (Table 6-1), however, given the silty composition and observed saturation likely have higher hydraulic conductivity than saprolite and residual soil. Sources of water to the alluvial soils are precipitation and runoff from the ABL cap and slopes on the eastern and western sides of the floodplain, and groundwater. Overall, groundwater is confined in PWR beneath saprolite based on periodic flowing artesian conditions in ABL-MW-3 and an upward vertical groundwater gradient beneath the floodplain (Section 6.3). The strong upward vertical groundwater gradient provides a source of recharge to the floodplain and associated wetland areas that exist within this floodplain. Historically, leachate exited to the floodplain, however, this source has been eliminated through construction of the leachate collection system and subsequent improvements as described in Section 9.1. However, it cannot be ruled out that residual contamination from this historical condition persists, and this possibility will be assessed during investigation activities planned for 2023 and the HCSM will be updated accordingly. Little Mountain Creek is incised into the PWR with bedrock observed within the creek both upstream and downstream of the Facility. Groundwater within the PWR (from both sides) discharges to the creek with baseflow maintained by PWR groundwater discharges throughout the catchment. The connection between PWR and the creek was documented on the log for ABL-PZ3I, which noted bubbles rising in the creek 50 feet upstream and downstream of the drilling location while drilling in to the PWR with an air hammer rig. Groundwater elevations and concentrations were assessed in piezometers installed within the fill material (PZ-13 through PZ-19) during the Phase 3 CMS Study (Environeering, 2012b). At this time the two most northerly piezometers were dry (PZ-13 and PZ-14), whereas the more southerly piezometers (PZ-15 through PZ-19) contained water. Of these piezometers, available cyanide was detected in PZ-16 and PZ-18 although concentrations were below NC 2L standards. Fluoride in groundwater was above standards in PZ-15 through PZ-19. These results indicate that at that time, waste was saturated in the lower portion of the landfill below PZ-15 through PZ-19. Time series data are not presently available to identify if the water in these is stagnant and isolated, or if water levels were affected by construction of the collection trench at the toe of the ABL. As shown in Figure 9-1, the waste material within the ABL is enveloped within a combination of saprolite and native (silt/clay) fill materials that have low permeability (consistent with the hydraulic conductivity data described for the Main Plant Area). Recharge through the landfill cap is limited, and based on the low permeability of the saprolite and fill, limited to no lateral migration will occur into the landfill waste within the shallow fill and saprolite materials. The only areas of groundwater in contact with the waste materials occurs at the toe of the landfill (as shown below) due to the vertical migration of groundwater from the PWR through the saprolite and into the fill. The low permeability of the saprolite limits the magnitude of this vertical flux and the resulting water volumes recovered by the downgradient groundwater recovery trenches (note these are not shown on the Figure 9-1 cross-section). EHS Support LLC 65 Hydrogeological Conceptual Site Model Update — Badin Business Park ABL-Specific Hydrogeology and Efficacy of ABL Corrective Measures 9.1 Efficacy of ABL Corrective Measures Corrective measures undertaken at the toe of the ABL are described in Section 2.5.2. As described in Section 2.5.2, the motivation for the design of a slurry wall, capture trench, and subsequent improvements (Figure 9-2) was to address the seeps that developed at the base of the ABL following the completion of the interim measures, which consisted of installing an improved cover system with lateral drains (Environeering, 2015). A portion of the seep water was believed to originate upslope of the ABL due to precipitation infiltration and a portion from recharge from bedrock through the base of the ABL. Historical analytical data suggests the seeps emanate from water that passes through the ABL materials or makes contact with residual impacts in the floodplain of Little Mountain Creek that arrived before the cover system improvements were implemented. Section 9.2 describes the efficacy of the remediation system. Benton ite 5I u rry;Wa I HDPE = high -density polyethylene PVC = polyvinyl chloride Figure 9-2 ABL Slurry Wall and Collection Trench Configuration 9.2 Recovery Volumes Recovery volumes from the ABL collection trench are monitored daily by a flow totalizer. The number of gallons per day that were captured and conveyed to the municipal treatment system through the force main is compared to the daily precipitation measured at the National Oceanic and Atmospheric Administration weather station located in Albemarle, North Carolina (Station USC00310090) (Figure 9-3). The results show that initially low recovery volumes in the collection trench were significantly improved following the 2017 modification, which rapidly drained groundwater that had accumulated EHS Support LLC 66 Hydrogeological Conceptual Site Model Update — Badin Business Park ABL-Specific Hydrogeology and Efficacy of ABL Corrective Measures behind the slurry wall. Initially, over 30,000 gallons were recovered per day; that rapidly decreased to under 5,000 gallons recovered per day over the remainder of 2017. 70,000 60,000 O 50,000 V OJ • 40,000 �, 30,000 O 20,000 L7 10,000 0 4k, IINI I CO In In 0 rl l i rl N O O O 0 N N N N d• L_ry rn rn Recovery Trench Precipitation N r▪ l r�l rl N N r▪ l Figure 9-3 ABL Collection Trench Recovery Volumes Compared to Daily Precipitation Totals Since 2018, the daily recovery volumes from the collection trench have varied on the order of months by tens of thousands of gallons. There is a correlation with individual precipitation events (Figure 9-3), and hurricane events in 2018 correlate increased recovery as do precipitation events in 2019. Recovery spikes in 2019 that are not associated with precipitation events are tied to system modifications to the collection system operation. A much better visual correlation is apparent when the recovery data is compared to a 30-day running average of precipitation (Figure 9-4). The result suggests that the increased recovery volumes are not associated with direct precipitation runoff from the landfill cap or local precipitation accumulation on the Little Mountain Floodplain. The good match with the 30-day running total is indicative of groundwater capture by the collection trench; a time -averaged approach is representative of water storage and seepage that occurs in a groundwater system as opposed to the instantaneous effects expected for the water sourced from sheet flow runoff. EHS Support LLC 67 Hydrogeological Conceptual Site Model Update — Badin Business Park ABL-Specific Hydrogeology and Efficacy of ABL Corrective Measures 70,000 - 60,000 --43 'g 50,000 - 0 u • 40,000 - ro ▪ 30,000 - 0. 0 20,000 - 173 (.9 10,000 - io n N co co rn rn 0 0 0 0 0 0 0 0 0 WD n If) to d▪ " Ln m m .,-1▪ Ln ti Lf1 ti ui ti in ti ti N ti Collection Trench Precipitation 0 ri N N 0 0 .l N - 0.6 0.5 m nq ro v 0.4 a)s u c CIA c c 0.3 .E 0 c ct .3_ 0.2 rya 'v o a - 0.1 0 Figure 9-4 ABL Collection Trench Recovery Volumes Compared to a 30-Day Running Average of Precipitation Totals To summarize, recovery volume data support the following conclusions: 1. The slurry wall is effective for minimizing groundwater mass flux to the floodplain of Little Mountain Creek as groundwater backed up behind it. 2. The 2017 modifications to the collection trench resulted in the effective capture of groundwater, as indicated by an initial rapid decrease in recovery volumes when water stored behind the slurry wall was drained. 3. The collection trench continues to operate as designed by capturing significant volumes of groundwater. 9.3 Electrical Conductivity Surveys Delineation of the extent of elevated constituent levels in the area downgradient of the ABL and the effectiveness of the collection trench system is monitored using electromagnetic (EM) surveys to measure the electrical conductance in soil pore water. The method allows for correlation between inorganic water chemistry data and data from electrical -based geophysical methods (Benson et al, 1985). The method can also be used for time -series measurements to evaluate concentration trends (Benson et al., 1985). An EM geophysical study was performed quarterly for one year, starting in the second quarter of 2018, to evaluate the potential for seasonal variability in soil pore water conductivity. The reference baseline surveys are compared to the subsequent geophysical surveys. Annual surveys are conducted in early fall, and the results are communicated to NCDEQ; the most recent round of data for 2022 was submitted to NCDEQ in December 2022. EHS Support LLC 68 Hydrogeological Conceptual Site Model Update — Badin Business Park ABL-Specific Hydrogeology and Efficacy of ABL Corrective Measures Results of the initial geophysical survey conducted in the third quarter of 2018 are shown on Figure 9-5. Areas of low apparent conductivity (less than 50 milliSiemens per meter [mS/m]) correlate with groundwater samples collected in October 2018, where fluoride concentrations ranged from 0.078 J to 0.23 mg/L (ABL-MW-3 through ABL-MW-5; "J" qualifier indicates a concentration between the method detection and reporting limits), below the NC 2L standards (Environeering Inc., 2019). Available cyanide in the samples from the same wells ranged from 0.00031 J mg/L to 0.0025 mg/L, which is also below the NC 2L standard. Contemporary data for groundwater samples from high apparent conductivity areas is not available; monitoring wells ABL-MW-8 through ABL-MW-13 were abandoned during construction of the collection trench and groundwater concentration data has not previously been reported. However, groundwater concentrations for piezometers PZ-15 through PZ-17 are available from the Screening Level Ecological Risk Assessment Report for the ABL (CEC, 2021b). PZ-15 through PZ-17 are located within the footprint of the landfill, and between August 2011 and August 2012 fluoride concentrations ranged from 8.9 to 77 mg/L (except one non -detect concentration at PZ-16 in May 2012). Over the same period, available cyanide ranged from not detected to 0.014 mg/L. These results indicate that apparent conductivity provides a useful measure of the spatial extent of impacted groundwater. It is anticipated that the suites of analyses collected during the Baseline Ecological Risk Assessment process will enable improved calibration of the apparent conductivity data. A comparison of temporal apparent conductivity trends is provided through the comparison of fall 2018 with fall 2022 apparent conductivity results (Figure 9-5 and Figure 9-6, respectively). Results show a notable decrease in the extent of apparent conductivity above 50 mS/m, which indicates the collection trench is effective. 3" Wide Soil Bentonite Slurry HDPE = high -density polyethylene PVC = polyvinyl chloride Figure 9-5 Initial (Fall 2018) Electromagnetic Conductivity Survey Results EHS Support LLC 69 Hydrogeological Conceptual Site Model Update — Badin Business Park ABL-Specific Hydrogeology and Efficacy of ABL Corrective Measures Figure 9-6 Fall 2022 Electromagnetic Conductivity Survey Results 9.4 Source of Constituents of Interest The RFI results showed no COIs were present in the soil adjacent to the ABL at concentrations exceeding the conservative risk -based screening values; therefore, soils surrounding the ABL do not pose an unacceptable risk to potential current or reasonably anticipated future receptors. However, the RFI did show that cyanide in groundwater exceeded the screening value in a single well downgradient of the ABL. A screening level risk assessment was conducted on Little Mountain Creek, the first receptor for groundwater downgradient of the ABL. No COIs were present at concentrations exceeding applicable human health screening values. However, the unit was retained in the corrective action process because of the one detection of total cyanide in groundwater above the regulatory standard (Environeering, 2012a). In 2018, surface water and sediment samples were collected from Little Mountain Creek and the eastern drainage ditch, a feature located on the eastern side of the Little Mountain Creek floodplain that is keyed into alluvium and receives both artesian and lateral runoff (Environeering, 2018c). Fluoride and total cyanide were below regulatory standards in the surface water from Little Mountain Creek but were detected above criteria in surface water from the eastern drainage ditch. Fluoride and cyanide were below criteria in the eastern drainage ditch sample closest to Little Mountain Creek. PAHs were above criteria in a single sample from the central ditch, and above criteria in a single Little Mountain Creek surface water sample from across Highway 740, which was attributed to an off -site source. PCB congener concentrations were above criteria in a single surface water sample from Little Mountain Creek but were not detected in the duplicate sample. PCB congener concentrations were above criteria in sediment samples from the middle and lower ditch sediment samples. It is documented that there EHS Support LLC 70 Hydrogeological Conceptual Site Model Update — Badin Business Park ABL-Specific Hydrogeology and Efficacy of ABL Corrective Measures was a fire due to a bushing failure at the adjacent substation on the opposite side of the eastern ditch from the ABL and that the substation is at a higher elevation than the eastern ditch and is in the upgradient direction of surface runoff. Surface water samples collected in September 2020 confirmed that fluoride and total cyanide were below regulatory standards in the surface water of Little Mountain Creek and that fluoride and total cyanide were above criteria in surface water samples from the eastern drainage ditch feature located on the eastern side of the Little Mountain Creek floodplain (CEC, 2021a). Potential sources for COIs on the floodplain of Little Mountain Creek include waste beneath the adjacent substation that was identified during drilling in 2007 (Environeering, 2008), historical releases from one of the two adjacent electrical substations, or residual impacts that entered the floodplain prior to finishing the ABL cap and collection trench system. Additional data to be collected from supplemental sampling planned for 2023 in this area is expected to provide additional constraints on the source of impacts. Elements of this HCSM document will be updated as new sampling data becomes available. EHS Support LLC 71 Hydrogeological Conceptual Site Model Update — Badin Business Park Conclusions 10 Conclusions The Facility differs from typical Appalachian Piedmont hydrogeological systems (Figure 1-1) because of extensive excavation, placement of fill, and leveling of topography. Key differences between the Facility and typical Piedmont hydrogeological flow systems are shown conceptually on Figure 1-1 and Figure 1-2. The primary difference is that low permeability residual soils and saprolite have been excavated from underlying PWR over much of the former Main Plant, and PWR/rock is the only water -bearing unit present. In other areas, fill derived from low -permeability native materials was used to fill ravines. Groundwater at the former Main Plant is recharged from the hillside to the west and from Badin Lake to the east. Lake water enters the groundwater system through PWR and fractured rock, which are exposed on the lake bottom and along the lake shore. PWR or fractured rock is present across the former Main Plant and ABL and has modest hydraulic conductivity. The orientation of bedding and fractures in the PWR/rock affect groundwater flow directions and COI fate and transport at the Facility and direct the groundwater flow toward the ABL where it discharges toward the floodplain of Little Mountain Creek and is captured in part by the ABL collection trench. Fill has locally higher hydraulic conductivity than PWR/fractured rock, however, it is present in isolated locations and generally underlain by low permeability saprolite and residual soils and surrounded by native soils used as fill. The isolation of fill areas limits migration of COIs in groundwater, except in localized areas where saprolite has been eroded or excavated. Remediation measures further limit infiltration into and seepage from areas of anthropogenic fill, including caps installed at the On -Site Landfill, ABL, and West Fill areas. In localized areas where saprolite was eroded by natural processes, fill is in contact with PWR or fractured rock. COIs that enter the PWR groundwater system rapidly mix with clean groundwater recharged from Badin Lake and upslope areas and are also geochemically attenuated through mineralization due to the strong pH gradient between source areas and recharge areas. A combination of vertical groundwater gradients, groundwater flow primarily through PWR and fractured rock, and geochemical attenuation appear to be the primary controls on plume geometry at the former Main Plant. Due to the effects of the structural geology, the presence of Badin Lake and potential leakage into the storm sewers in the south, groundwater flow at the Facility is directed away from Lake Badin towards Little Mountain Creek. Some small, localized areas of granular fill may have components of groundwater flow in other directions, however, these flow regimes are minor and likely to only be present for short periods of time because water rapidly leaks into the deeper PWR unit. In the context of the ABL, the groundwater flow regime is towards Little Mountain Creek. Generally, vertical gradients in the higher elevation areas are downward with limited water encountered in the fill and saprolite. While in the lower elevation of the ABL, vertical gradients reverse with groundwater from the PWR moving vertically upward into the saprolite, fill, and in the floodplain area alluvial deposits. Little Mountain Creek is incised into the PWR and all groundwater in the area (from both sides of the river) discharges to Little Mountain Creek. Baseflow within Little Mountain Creek is maintained by the flow of groundwater into this system. EHS Support LLC 72 Hydrogeological Conceptual Site Model Update — Badin Business Park Conclusions Large fluoride and cyanide plumes are not observed on the Main Plant due to the combination of geochemical processes and the dilutionary effects of Badin Lake water entering the PWR and flowing south toward Little Mountain Creek. While impacts are present within the immediate vicinity of the SWMUs, these have been shown to rapidly attenuate. Since completion of the last major groundwater sampling event in 2011, Facility operations have terminated and capping and remedial works have been completed. This combination of actions, coupled with natural attenuation processes, have likely resulted in major declines in groundwater concentrations. The planned comprehensive groundwater sampling event in the first quarter of 2023 will update our understanding of current conditions. The source of fluoride exceedances at Outfall 005 is infiltration of groundwater into the aged stormwater conveyance system. Recent efforts to plug the piping have resulted in material benefits and lowering of fluoride concentrations at Outfall 005. Fluoride -impacted groundwater is still entering the piping in areas where infrastructure intercepts the PWR. Supplemental investigations planned for 2023 are aimed at verifying this conceptualization and arriving at an appropriate mitigation measure. Corrective measures undertaken at the ABL are effective at capturing groundwater and apparent conductivity surveys indicate that the footprint of impacted groundwater beneath the floodplain of Little Mountain Creek is decreasing in size. A comprehensive program of evaluations is being planned for the floodplain of Little Mountain Creek in 2023. The expectation is that this HCSM will be updated as new data becomes available. EHS Support LLC 73 Hydrogeological Conceptual Site Model Update — Badin Business Park References 11 References Acworth, R.I. 1987. The development of crystalline basement aquifers in a tropical environment. Quarterly Journal of Engineering Geology and Hydrogeology, 20(4), pp.265-272. Alcoa. 1996. Interim Measures Report. On -Site Landfill (SWMU No. 1) and Wet Weather Run -On Diversion (SWMU No. 33). Aluminum Company of America - Badin Works. Badin, North Carolina. December. Alcoa. 1998. Interim Measures Report, Alcoa-Badin Landfill (SWMU #2), Regrading and Cover System Installation. Aluminum Company of America - Badin Works, Badin, North Carolina NCD003162542. Aquaterra Inc. 1991a. Preliminary Soil and Ground Water Assessment, Badin Municipal Landfill, Aluminum Company of America, Inc., Badin, North Carolina. August 14. Aquaterra Inc. 1991b. Preliminary Soil and Groundwater Assessment, ALCOA Brick Landfill, Badin, North Carolina. September 3. A.T. Kearney Inc. 1990. Interim RCRA Facility Investigation/Assessment (RFI/A) Report. EPA ID No. NCD003162542. March. Badin Business Park LLC, 2019. Little Mountain Creek Confirmatory Sampling Report. May 28. Benson, R.C., M.S. Turner, W.D. Vogelsong, and P.P. Turner. 1985. Correlation between field geophysical measurements and laboratory water sample analysis, Proceedings of the Conference on Surface and Borehole Geophysical Methods in Ground Water Investigations, National Water Well Association, Worthington, OH, pp. 178-197. BHE Environmental Inc. 2005. Site Wide Investigation, Alcoa Badin Works, HWY. 740 & SR 1719, Badin (Stanley County), North Carolina. August 5. BHE Environmental Inc. 2006. Site Wide Storm Sewer Assessment, Alcoa Badin Facility, Badin, North Carolina. June 2. BHE Environmental Inc. 2011. Sitewide groundwater sampling Report, Badin Works, Badin North Carolina. September. Buol, S.W. and S.B. Weed. 1991. Saprolite-soil transformations in the Piedmont and Mountains of North Carolina. In: M.J. Pavich (Editor), Weathering and Soils. Geoderma, 51:15-28. Civil Environmental Consultants Inc. (CEC). 2020. Investigation Summary Report for the Alcoa/Badin Landfill. Task 1— Subtask 1— Surface Water Assessment. February. Civil Environmental Consultants Inc. (CEC). 2021a. Surface Water Sampling Report for the Alcoa/Badin Landfill and Little Mountain Creek. January. EHS Support LLC 74 Hydrogeological Conceptual Site Model Update — Badin Business Park References Civil Environmental Consultants Inc. (CEC). 2021b. Screening Level Ecological Risk Assessment Report for the Alcoa/Badin Municipal Landfill. December. Daniel, C.C. and P.R. Dahlen. 2002. Preliminary hydrogeologic assessment and study plan for a regional ground -water resource investigation of the Blue Ridge and Piedmont Provinces of North Carolina (Vol. 2, No. 4105). US Department of the Interior, US Geological Survey. Environeering. 2008. Investigation Summary Report. Alco, Inc. Old Badin Municipal Landfill and APGI Switchyard. Badin, North Carolina. February 22. Environeering. 2010. Corrective Measures Study — Phase 1. Badin Works Facility, Badin, North Carolina. October 31. July 30. Environeering. 2012a. Phase 2 — Engineering Data Collection for the Corrective Measures Study, Badin Works Facility, Badin, North Carolina. October 31. Environeering. 2012b. Phase 3 - Engineering Data Collection for the Corrective Measures Study. Badin Works Facility, Badin, North Carolina. October 31. Environeering. 2013. Phase 4 Corrective Measures Alternatives and Phase 5 Justification and Recommendation of the Selected Corrective Measure Alternative for the Corrective Measures Study, Badin Works Facility, Badin, North Carolina. Environeering. 2015. Alcoa Badin Landfill and Former Ball Field Sampling Activities. Former Badin Works Facility, Badin, North Carolina. September 15. Environeering. 2018a. Groundwater Sampling Report for the Badin Business Park Facility, Badin, North Carolina. September 11. Environeering. 2018b. Revised Investigative Work Plan For The Phase 4 And 5 Corrective Measures Study, Alcoa/Badin Landfill, And Former Ball Field Badin Business Park LLC f/k/a Alcoa Badin Works Facility Badin, North Carolina. April 2. Environeering. 2018c. Investigative Report for the Little Mountain Creek Area. Badin Business Park Facility, Badin, North Carolina. December 5.Environeering. 2019. Investigation Summary Report for the Alcoa/Badin Municipal Landfill. Task 1 - Subtask 2 - Hydrologic Conditions. Badin Business Park Facility, Badin, North Carolina. December 20. Feiss, P.G. 1982. Geochemistry and tectonic setting of the volcanics of the Carolina slate belt. Economic Geology, 77(2), pp.273-293. Fenneman, N.M. 1917. Physiographic subdivision of the United States. Proceedings of the National Academy of Sciences of the United States of America, 3(1), p.17. Geraghty & Miller Inc. 1995. Hydrogeologic Investigation at SWMU #1 - The On -Site Landfill for Aluminum Company of America Badin, North Carolina. October. EHS Support LLC 75 Hydrogeological Conceptual Site Model Update — Badin Business Park References Geraghty & Miller Inc. 1996. Pine Tree Grove Area Investigation for Aluminum Company of America, Badin, North Carolina. November. Ghosh, R.S., D.V. Nakles, I.P. Murarka, and E.F. Neuhauser. 2004. Cyanide speciation in soil and groundwater at manufactured gas plant (MGP) sites. Environmental engineering science, 21(6), pp.752-767. Johnson, A.I. 1967. Specific yield: compilation of specific yields for various materials (No. 1662). US Government Printing Office. Law. 1990. Phase I Ground -Water Assessment Northwest Valley; Alcoa-Badin Works. LeGrand, H.E. 1967. Ground water of the Piedmont and Blue Ridge provinces in the southeastern states (Vol. 538). US Government Printing Office. LeGrand, H.E. 2004. A master conceptual model for hydrogeological site characterization in the piedmont and mountain region of North Carolina: a guidance manual. NC Department of Environment and Natural Resources, Division of Water Quality, Groundwater Section. McMahon, P.B., C.J. Brown, T.D. Johnson, K. Belitz, and B.D. Lindsey. 2020. Fluoride occurrence in United States groundwater. Science of the Total Environment, 732, p.139217. McVay, K.A., D.E. Radcliffe, L.T. West, and M.L. Cabrera. 2004. Anion exchange in saprolite. Vadose Zone Journal, 3(2), pp.668-675. MFG Inc. 2001. RCRA Facility Investigation Report Volume I of II. Alcoa Badin Works, Badin, North Carolina. March. NCDEQ, 2017. Review of Phase 4 and 5 of the Corrective Measures Study (CMS). January 23. North Carolina Geological Survey. 1985. Geologic Map of North Carolina. Thematic map, 1:500,000. Department of Natural Resources and Community Development, Division of Land Resources, Raleigh. Pavich, M.J., G.W. Leo, S.F. Obermeier, and J.R. Estabrook. 1989. Investigations of the characteristics, origin, and residence time of the upland residual mantle of the Piedmont of Fairfax County, Virginia (No. 1352). Power Engineers Inc. 2013. Badin Lake Sediment Capping Project: Construction Completion Report. Badin, North Carolina. November. Power Engineers Inc. 2017. Badin Landfill Deep Collection Construction Completion Report. September 15. Puls, R W. and M. J. Barcelona. Ground Water Issue: Low -Flow (Minimal Dirawdown) Groundwater Samling Procedures U.S. Environmental Protection Agency, Washington, DC, EPA/540/5-95/504 (NTIS 97-118822), 1996. EHS Support LLC 76 Hydrogeological Conceptual Site Model Update — Badin Business Park References Randell Environmental Consulting. 2016. Spent potlining project (feasibility of an agreement based approach to clear stockpiles). Final national summary report prepared for the Australian Department of Environment and Energy. October. Sowers, G.F. and T.L. Richardson. 1983. Residual soils of piedmont and Blue Ridge. Transportation Research Record, (919). Stromquist, A.A. and J.R. Henderson. 1985. Geologic and geophysical maps of south-central North Carolina (No. 1400). Stromquist, A.A. and H.W. Sundelius. 1969. Stratigraphy of the Albemarle Group of the Carolina slate belt in central North Carolina. United States Department of the Interior, Geological Survey. Steponaitis, V.P., J.D. Irwin, T.E. McReynolds, and C. Moore. 2006. Stone Quarries and Sourcing in the Carolina Slate Belt. Research Report 25, Research Laboratories of Archaeology, University of North Carolina, Chapel Hill, NC 27599-3120. April. Swain, L.A., T.O. Mesko, and E.F. Hollyday. 2004. Summary of the hydrogeology of the Valley and Ridge, Blue Ridge, and Piedmont physiographic provinces in the eastern United States (Vol. 1422). Reston, VA: US Geological Survey. Tailing, J.F. 2010. pH, the CO2 system and freshwater science. Freshwater Reviews, 3(2), pp.133-146. U.S. Army Corps of Engineers. 2020. Notification of Jurisdictional Determination. Action I.D. SAW-2019- 00450. Worthington, S.R. 2022. Estimating effective porosity in bedrock aquifers. Groundwater, 60(2), pp.169- 179. EHS Support LLC 77 Hydrogeological Conceptual Site Model Update — Badin Business Park Attachment A 2022 Investigation Boring Logs EHS Support LLC Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-200 \tin `� `_\ 2704 Cherokee Farm Way PAGE 1 OF 2 Suite 101 _ _ _` Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 08/03/2022 DATE COMPLETED 08/03/2022 CEC FIELD REPRESENTATIVE AJK REVIEWED BY MWW GROUND ELEVATION 530.35 ft amsl CASING ELEVATION 533.11 ft amsl LATITUDE 35.413934 LONGITUDE -80.116799 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER John Eisenman DRILLING METHOD 8-3/8-in Hollow Stem Auger/Air Rotary BACKFILL 2" Monitoring Well Installed BOREHOLE DIAMETER 8.38 in CORE SIZE NA MONITORING EQUIPMENT NA OUTER CASING NA WELL INSTALLED 08/03/2022 WELL STICKUP Stickup, 2.76 ft DEVELOPMENT METHOD Surge with Submersible Pump WELL KEY NA RESULTS NA NOTES YIELD NA WATER LEVELS U At Time of Drilling: NA Temporary Well: NA = End of Drilling: 08/03/2022 20.50 ft bgs / Elev 509.85 ft amsl Well Top of Casing : 09/08/2022 22.95 ft TOC/ Elev 510.16 ft amsl After Drilling: 08/04/2022 19.60 ft bgs / Elev 510.75 ft amsl NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) BLOW COUNTS (N VALUES) WELL DIAGRAM — v —'k��-' - — — — 5 — 5ft Dark Brown, Sandy Root Material, Moist -, Loose, (TOPSOIL) 529.8— — — - — — — — —— —521— — — — — — — — — 18-28-46-50 /0.4' (74) 26-50/0.4' 1 Grout 1 \ \ \ \6.o Red to Orange, Silty CLAY, with Sand, Moist -, Very Stiff, (RESIDUAL SOIL) ft 524.4 — — — — —10— — — — — —15— — — \ \ \ 11\ \ \ \ \ \ \ \ Red, Silty CLAY, Moist -, Hard, Breaks along and across bedding, gray colors, black redox features along cross cutting bedding planes (SAPROLITE) 1 2" ID Solid PVC Riser frnnfint Ind f'lcvf PnncN Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-200 Cherokee101 Farm Way PAGE 2 OF 2 TN 37920 Park LLC PROJECT NAME Badin Business Park \tin`� _ CLIENT PROJECT `_\ 2704Suite _ _ ` Knoxville, Badin Business NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG ELEVATION (ft) BLOW COUNTS (N VALUES) WELL DIAGRAM MATERIAL DESCRIPTION -\ Red, Silty CLAY, Moist -, Hard, Breaks along and across bedding, gray \ colors, black redox features along cross -cutting bedding planes — —— \ (SAPROLITE) —511— —20— , 'Top of Casino \\ I — — — — \ — — — — \ \ — — — \ — — — — \ — — —25— \ — — \ — — — \ 4 Bentonite \ — — Chips — — \ —501- -30— \ — — \ — — — \ —35— \ 36.0 ft 494.4 — Sand 11�` (WEATHERED ROCK) weathered rock, Typ. gray weathered meta-mudstone — - - — — -{ — 2lotted ID 1" Slotted PVC — —\ t� — — _ Screen — J lli` - -40.0 —491—— ft 490.4 — 40 Meta-mudstone bedrock (WEATHERED ROCK) — — — —... '•41.5ft 488.8— — End of Monitoring Well at 41.5 feet — —45— Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-201 \tin `� `_\ 2704 Cherokee Farm Way PAGE 1 OF 2 Suite 101 _ _ _` Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 08/04/2022 DATE COMPLETED 08/04/2022 CEC FIELD REPRESENTATIVE AJK REVIEWED BY MWW GROUND ELEVATION 518.05 ft amsl CASING ELEVATION 521.02 ft amsl LATITUDE 35.412779 LONGITUDE -80.115822 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER John Eisenman DRILLING METHOD 8-3/8-in Hollow Stem Auger/Air Rotary BACKFILL 2" Monitoring Well Installed BOREHOLE DIAMETER 8.38 in CORE SIZE NA MONITORING EQUIPMENT NA OUTER CASING NA WELL INSTALLED 08/04/2022 WELL STICKUP Stickup, 2.97 ft DEVELOPMENT METHOD Surge with Submersible Pump WELL KEY NA RESULTS NA NOTES YIELD NA WATER LEVELS U At Drilling: 08/05/2022 10.10 ft bgs / Elev 507.95 ft amsl Temporary Well: NA End of Drilling: NA Well Top of Casing : 09/08/2022 12.55 ft TOC/ Elev 508.47 ft amsl Er After Drilling: NA NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) BLOW COUNTS (N VALUES) WELL DIAGRAM — v —ll — — — 5 — 10.5ft Dark Brown, Sandy SILT, Root Material, Moist, Loose, (TOPSOIL) 517.6 — — — — — — — — —5O9— — — — — — — — — — — 18-37-50/0. 4' 23-50/0.1' / Grout \ \ \ \s.0 Tan to Red, Silty CLAY, Trace Sand, Moist -, Hard to Very Stiff, (RESIDUAL SOIL) ft 512.0— — — - —10— — — — — — — —15— — — \ \ \ \Top \ \ \ \ \ \ \ \ \ Typ of MW-200 + MW-202 (SAPROLITE) V of Casing V / 2DSolid PVC Riser PVC Riser rrnnfini Ind t'lcvt Pnnc1 Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-201 2704Suite Cherokee101 Farm Way PAGE 2 OF 2 ` Knoxville, TN 37920 Park LLC PROJECT NAME Badin Business Park `� _ `\ CLIENT PROJECT `_\ _ _ Badin Business NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG ELEVATION (ft) BLOW COUNTS (N VALUES) WELL DIAGRAM MATERIAL DESCRIPTION -\ Typ of MW-200 + MW-202 (SAPROLITE) — — \ -499- -20- \ - - - - \ — \ - - \ - - -25- \ - - - - \ - - / Bentonite Chips \28.0 ft 490.0 - �\ `\\ Partially weathered rock - Typ. weathered meta-mudstone (WEATHERED ROCK) _ - �as— -30-\ \ 11t` r- — —A,s. —v, _ _ = _ _—„ \. V�\i1,� _ _ _ - - \ 11l — — — / Sand -35 1 - - \\36.0ft 482.0 Meta-mudstone - Typ., 40' water at time of drilling (WEATHERED ROCK) - / 2" ID 0.01" Slotted PVC — �� — — = Screen - J: 11% -479- _ -40- �\ '' - - _ End of Monitoring Well at 41.0 feet -45- - - Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-202 `� `_\ 2704Suite Cherokee101 Farm Way PAGE 1 OF 2 \tin _ _ _ ` Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 08/02/2022 DATE COMPLETED 08/03/2022 CEC FIELD REPRESENTATIVE AJK REVIEWED BY MWW GROUND ELEVATION 515.92 ft amsl CASING ELEVATION 515.63 ft amsl LATITUDE 35.411635 LONGITUDE -80.115144 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER John Eisenman DRILLING METHOD 8-3/8-in Hollow Stem Auger/Air Rotary BACKFILL 2" Monitoring Well Installed BOREHOLE DIAMETER 8.38 in CORE SIZE NA MONITORING EQUIPMENT NA OUTER CASING NA WELL INSTALLED 08/03/2022 WELL STICKUP Flush Mount (Default), -0.29 ft DEVELOPMENT METHOD Surge with Submersible Pump WELL KEY NA RESULTS NA NOTES YIELD NA WATER LEVELS U At Drilling: 08/03/2022 13.80 ft bgs / Elev 502.12 ft amsl Temporary Well: NA End of Drilling: NA Well Top of Casing : 09/08/2022 7.10 ft TOC/ Elev 508.53 ft amsl Er After Drilling: NA NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM _ _ — — i o.5n Dark Brown, Sandy SILT, Organics, Root Material, Moist -, Loose, 515.4 — — — — — — — —506— — — — — — — — — 70 100 28-38-50/0. 4 18-45-50 (95) l Grout ' A(TOPSOIL) Tan, Gravelly SAND, with Silt, and Clay, Moist -, Medium Dense, Rocks are angular to subangular, flat pieces of meta-mudstone (FILL) 5.05 510.9_ 5 — — — — —10— — — —— —15— — — \ \ \Top \ \ \ \ \ 1\ \ \ \ Tan, Silty CLAY, Moist -, Hard, Core breaks along bedding planes, Redox. features - rusty red to black along + cross cutting bedding (SAPROLITE) of Casing V / 2" ID Solid PVC Riser /f nnfin, icr4 Mov4 Porvol Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-202 2704Suite Cherokee101 Farm Way PAGE 2 OF 2 ` Knoxville, TN 37920 Park LLC PROJECT NAME Badin Business Park `� _ `\ CLIENT PROJECT `_\ _ _ Badin Business NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM MATERIAL DESCRIPTION — — -\ Tan, Silty CLAY, Moist -, Hard, Core breaks along bedding planes, Redox. features - rusty red to black along + cross cutting bedding — — — — \ (SAPROLITE) -20- \ -496- \ - - \ - - \ \ - - - - -25- \ \ \ 1 Bentonite — — \ — — Chips \ \28.0 ft 487.9- - �`\\\ Partially weathered - Typ of 203+204, water at 40' during drilling - \\, lost dust recovery (WEATHERED ROCK) — — - -' -30� VA\ \ - - —`\� l' — — _ /Sand \\1111i1 2"ID0.01" ;�� _4 — Slotted PVC �' 38.0 ft 477.9- - — Screen _ Meta-mudstone Typ. (WEATHERED ROCK) 41\(r -40- �76- _ - - -& .� - 1,, (42.0 ft 473.9_ - End of Monitoring Well at 42.0 feet -45- - - Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-203 �`� _ `� _ `i`_` 2704Suite Cherokee101 Farm Way PAGE 1 OF 2 Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 08/02/2022 DATE COMPLETED 08/02/2022 CEC FIELD REPRESENTATIVE AJK REVIEWED BY MWW GROUND ELEVATION 524.78 ft amsl CASING ELEVATION 524.42 ft amsl LATITUDE 35.410280 LONGITUDE -80.115167 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER John Eisenman DRILLING METHOD 8-3/8-in Hollow Stem Auger/Air Rotary BACKFILL 2" Monitoring Well Installed BOREHOLE DIAMETER 8.38 in CORE SIZE NA MONITORING EQUIPMENT NA OUTER CASING NA WELL INSTALLED 08/02/2022 WELL STICKUP Flush Mount (Default), -0.36 ft DEVELOPMENT METHOD Surge with Submersible Pump WELL KEY NA RESULTS NA NOTES YIELD NA WATER LEVELS U At Drilling: 08/02/2022 16.50 ft bgs / Elev 508.28 ft amsl Temporary Well: NA End of Drilling: NA Well Top of Casing : 09/08/2022 15.30 ft TOC/ Elev 509.12 ft amsl Er After Drilling: 08/03/2022 15.90 ft bgs / Elev 508.88 ft amsl NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) BLOW COUNTS (N VALUES) WELL DIAGRAM — — — —o° bpol- o d Opp o 4 at- ,' -" . t - .t __ 3.0ft Tan, Sandy GRAVEL, with Clay, and Silt, Moist -, Medium Dense, (FILL) 521.8— — — — — — — — — — — — — —515— — — — - 8-18-44-46 (62) 12-37-50 (87) 22-50/0.4' / Grout — 5 — Red, Silty CLAY, Moist -, Very Stiff to Hard, Very stiff to hard with depth, slightly moist to moist with depth, medium to high plasticity (RESIDUAL SOIL) ' k. '70ft 517.8— — — —10— — — —15— - — Red to Tan, Silty CLAY, Moist, Hard, Some redox features or secondary \ features - yellow to white along bedding planes (RESIDUAL SOIL) +\1 `\ 9.5ft 515.3 Tan to Yellow, Clayey SILT, Moist -, Hard, (SAPROLITE) y Top of Casings 1 . . 2" ID Solid PVC Riser frnnfini Ind f'lcvf PnncN Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-203 PAGE 2 OF 2 Business Park \tin _ CLIENT PROJECT `� `_\ 2704Suite Cherokee101 Farm Way _ _ ` Knoxville, TN 37920 Badin Business Park LLC PROJECT NAME Badin NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) BLOW COUNTS (N VALUES) WELL DIAGRAM -20- -25- — — 30.0ft Tan to Yellow, Clayey SILT, Moist -, Hard, (SAPROLITE) 494.8-495- — — -505- - - — - -- — — _ _ - - 485- — — - 1 Bentonite Chips 1 Sand _. — _ 30 - —�� -J.111` -35-, — — \\11i1 Ak, ,, Partially weathered meta-mudstone, yellow to gray dust feedback (WEATHERED ROCK) 484.8 - = — D 1" 20.0 V Slotted PVC Screen 40--40.0ft ——`�\111 1 �,42.0 ft Gray, Hard, meta-mudstone (WEATHERED ROCK) 482.8- _ -45- End of Monitoring Well at 42.0 feet Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-204 \i `� `\ 2704 Cherokee Farm Way PAGE 1 OF 2 Suite 101 _ _ _` Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 08/01/2022 DATE COMPLETED 08/02/2022 CEC FIELD REPRESENTATIVE AJK REVIEWED BY MWW GROUND ELEVATION 520.98 ft amsl CASING ELEVATION 520.67 ft amsl LATITUDE 35.409282 LONGITUDE -80.115465 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER John Eisenman DRILLING METHOD 8-3/8-in Hollow Stem Auger/Air Rotary BACKFILL 2" Monitoring Well Installed BOREHOLE DIAMETER 8.38 in CORE SIZE NA MONITORING EQUIPMENT NA OUTER CASING NA WELL INSTALLED 08/01/2022 WELL STICKUP Flush Mount (Default), -0.31 ft DEVELOPMENT METHOD Surge with Submersible Pump WELL KEY NA RESULTS NA NOTES YIELD NA WATER LEVELS U At Drilling: 08/01/2022 34.50 ft bgs / Elev 486.48 ft amsl Temporary Well: NA End of Drilling: NA Well Top of Casing : 09/08/2022 12.28 ft TOC/ Elev 508.39 ft amsl Er After Drilling: 08/02/2022 12.80 ft bgs / Elev 508.18 ft amsl NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) BLOW COUNTS (N VALUES) WELL DIAGRAM v — — \ 1o.5ft Dark Brown, Sandy SILT, Organics, Root Material, Moist, Loose, Grass on 520.5 — — (34) 12-32-50/0. 4, / Grout 12 \Top (TOPSOIL) / Tan, Gravelly SAND AND SILT, Moist -, Loose to Medium Dense, Ranges .oft from very sandy silt to very silty sand (FILL) 519.0 — — \ \ Red, Silty CLAY, Moist -, Stiff to Hard, (RESIDUAL SOIL) 5.0 ft 516.0 — — 5 — — — — — — —10— — — — — —15— — — \ \ \ \ \ \ \ \ \Top \ \ \ Orangish Red, Silty CLAY, with Sand, Moist -, Hard, Visible bedding, redox features are rusty red and black (SAPROLITE) of Casings Y ——14-12-22-24 — — — — - - —511— — — — — — — — 2" ID Solid PVC Riser frnnfini Ind t'lcvf Ponta\ Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-204 2704Suite Cherokee101 Farm Way PAGE 2 OF 2 Knoxville, TN 37920 Park LLC PROJECT NAME Badin Business Park `� _ `\ CLIENT PROJECT `_\ _ _` Badin Business NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG ELEVATION (ft) BLOW COUNTS (N VALUES) WELL DIAGRAM MATERIAL DESCRIPTION — — -\ Orangish Red, Silty CLAY, with Sand, Moist -, Hard, Visible bedding, redox features are rusty red and black (SAPROLITE) — — \ — — 1 Bentonite Chips -20- \ -501- - - \ — \ - - \ — — -25- \\ - - - - \ - - \27.0 ft 494.0 - Gray, Hard, Partially Weathered, Meta-Mudstone, Light Gray Dust Recovery (WEATHERED ROCK)— --1 —N)k A — — 1 Sand — -\ __,\,..., , v __ - - __ _ —_ _ _ �`� 36.0 ft 485.0 _t 2 2" ID 0.01" Slotted PVC Gray, Hard, Meta-Mudstone, Very Hard below 39' (WEATHERED ROCK) — �A — — _ Screen l — -40-! ` . \i, —481- - 1, 1' 41.5ft 479.5 — End of Monitoring Well at 41.5 feet — — -45- - - Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-205 �`� `� `\ 2704 Cherokee Farm Way PAGE 1 OF 2 m _ _ _` Suite 101 Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 08/04/2022 DATE COMPLETED 08/04/2022 CEC FIELD REPRESENTATIVE DC REVIEWED BY MWW GROUND ELEVATION 521.08 ft amsl CASING ELEVATION 523.85 ft amsl LATITUDE 35.408317 LONGITUDE -80.116057 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER Zach Thompson DRILLING METHOD 8-3/8-in Hollow Stem Auger/Air Rotary BACKFILL 2" Monitoring Well Installed BOREHOLE DIAMETER 8.38 in CORE SIZE NA MONITORING EQUIPMENT NA OUTER CASING NA WELL INSTALLED 08/04/2022 WELL STICKUP Stickup, 2.77 ft DEVELOPMENT METHOD Surge with Submersible Pump WELL KEY NA RESULTS NA NOTES YIELD NA WATER LEVELS U At Drilling: 08/04/2022 26.50 ft bgs / Elev 494.58 ft amsl Temporary Well: NA End of Drilling: NA Well Top of Casing : 09/08/2022 15.74 ft TOC/ Elev 508.11 ft amsl Er After Drilling: 08/05/2022 23.80 ft bgs / Elev 497.28 ft amsl NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery BLOW COUNTS (N VALUES) WELL DIAGRAM �45' 5 Orange and Red, Sandy SILT, and Sand, Dry, (RESIDUAL SOIL) 5.0ft 516.1 — — — — — —512- — — — — — — — — — — — — — 80 100 80 50 95 100 _ 7 (13) 4 8-5-5-7 (10) 10-5-5-13 (10) 9-8-13-16 (21) 8-20-39-46 (59) 15-17-33-50 /0.3' (50) / Grout — — — — -10— — — \ Orangish Brown to Reddish Orange, Silty CLAY, Moist - to Moist, Transition Zone Material, black oxide staining from 9.7 to 12 (RESIDUAL SOIL) 12.0 ft 509.1 / 2" ID Solid PVC Riser — — —15— — y Orange to Brown, Clayey SILT, Moist - to Dry, Saprolite with black Top of Casing and silver oxide staining, structure is less well-defined in top half of 13-15 interval, structure is noted to be nearly vertical in bottom half of 13-15 interval (SAPROLITE) 16.5ft /ffannish Gray to Gray, Dry to Moist -, PARTIALLY WEATHERED \\_ 504.6 i._ `(' \\ l r _ ROCK, silver oxide staining in top 6", nearly vertical veins of clay noted in bottom 4" of 21-23 interval (WEATHERED ROCK) /rnnfini icri M ,v+ Pono\ Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-205 PAGE 2 OF 2 Badin Business Park �`� _ `� _ `_` \ 2704Suite Cherokee101 Farm Way CLIENT PROJECT Knoxville, TN 37920 Badin Business Park LLC PROJECT NAME NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM — �\ —�� — —20—\ --' - J\\\`l —25—\ 11� _ \\�l 1�� k\ al' �1i 1 \�\ Tannish Gray to Gray, Dry to Moist -, PARTIALLY WEATHERED ROCK, silver oxide staining in top 6", nearly vertical veins of clay noted in bottom 4" of 21-23 interval (WEATHERED ROCK) 27.Oft 494.E — — —502— - - — — 492 — — — —482- — - 85 90 22-so/o.4 25-50/0.4' 14-29-50/0. 4 Bentonite 4 Sand - — _ - — _ _ _ — — Slotted PVC Screen — — —\ kGray, \1 \1\11 �\ ,31.09 METAMUDSTONE (WEATHERED ROCK) 490.1 —35— — — -40— -45— End of Monitoring Well at 31.0 feet Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-206 �`� _ `� `i` 2704Suite Cherokee101 Farm Way PAGE 1 OF 2 _ _` Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 06/29/2022 DATE COMPLETED 06/29/2022 CEC FIELD REPRESENTATIVE DC REVIEWED BY MWW GROUND ELEVATION 512.25 ft amsl CASING ELEVATION 511.87 ft amsl LATITUDE 35.407133 LONGITUDE -80.115223 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER Stefan Smith DRILLING METHOD 8-1/4-in Hollow Stem Auger + SPT BACKFILL 2" Monitoring Well Installed BOREHOLE DIAMETER 8.25 in CORE SIZE NA MONITORING EQUIPMENT NA OUTER CASING NA WELL INSTALLED 06/29/2022 WELL STICKUP Flush Mount (Default), -0.38 ft DEVELOPMENT METHOD Surge with Submersible Pump WELL KEY NA RESULTS NA NOTES YIELD NA WATER LEVELS U At Drilling: 06/29/2022 5.00 ft bgs / Elev 507.25 ft amsl Temporary Well: NA End of Drilling: NA Well Top of Casing : 09/08/2022 3.75 ft TOC/ Elev 508.12 ft amsl Er After Drilling: 06/30/2022 4.80 ft bgs / Elev 507.45 ft amsl NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM — — 5 — — — — Orange Brown, Sandy SILT, with Gravel, Moist, Topsoil at surface (RESIDUAL SOIL) 4.0 ft 508.2 Top of casing Orange Brown, Clayey SILT, Wet, Saprolitic (SAPROLITE) I 506.0 — — — — —503— _ — — _ _ — — — — — 75 50 50 100 50 50 4-2-4-6 (6) 1-1-3-1 (4) 1-1-1-1 (2) 1-2-1-5 (3) 2-4-3-3 (7) -2-1 2-(3) (3) 1 Grout + Orange Brown, CLAY, Wet, Transition -Zone Material (SAPROLITE) '°oft Gray, PARTIALLY -WEATHERED ROCK, Wet (WEATHERED 10 —®t 3.': --5°2.2 \ROCKJ / Orange Brown, CLAY, Wet, Transition -Zone Material (SAPROLITE) .7 ft 500.6 2.°ft Gray, PARTIALLY -WEATHERED ROCK, Wet (WEATHERED Soo.z — — \ -- ROCK) / Red Brown, CLAY, Transition -Zone Material, Interbedded with Gray Partially -Weathered Rock (SAPROLITE) ft 498.2 / 2" ID Solid PVC Riser — Orange Brown, Clayey SILT, Wet, Saprolitic (SAPROLITE) —15Sl5.Oft — — \•`a ` Orange, CLAY, Wet, Transition -Zone Material (SAPROLITE)4972— 9 /r^nnfin, ic,1 Mov4 Pono1 Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-206 �`� _ `� _ _` `i` 2704Suite Cherokee101 Farm Way PAGE 2 OF 2 Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM 'is .oft Orange, CLAY, Wet, Transition -Zone MaterialiSAPROLIT) 494.2 — — �93- — — — — - - — — - - -483— — — — — — — -473- 50 30 75 75 100 100 100 100 1-2-2-4 (4) 3-4-3-3 (7) 351021 (15) 3-5-9-50/0.3 (14) 50/0.2' 50/0.4' 31-50/0.4' 50 / Bentonite Chips I Sand — — ,._ � `�` Red Brown, CLAY, Wet, Transition -Zone Material, Interbedded with Gray Partially -Weathered Rock (SAPROLITE) o.oft 4922 20 _ ( t Gray, PARTIALLY -WEATHERED ROCK, Moist (WEATHERED ROCK) 22.0ft 490.2 - - Orange Brown, Clayey SILT, Moist, Silver Oxide Staining, Moist (RESIDUAL SOIL) 24.0 ft 488.2 - - - _ / -25-- — -' 30 --Af - -�� 35 \k(f AV av \\ilia I35.0 \1 `N Gray, PARTIALLY -WEATHERED ROCK, Dry (WEATHERED ROCK) ft 477.2 -_ — _ - 2" ID 0.01" Slotted PVC Screen - - -40- -45- End of Monitoring Well at 35.0 feet Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-207 �`� _ `� _ `_` \ 2704Suite Cherokee101 Farm Way PAGE 1 OF 1 Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 06/27/2022 DATE COMPLETED 06/27/2022 CEC FIELD REPRESENTATIVE DC REVIEWED BY MWW GROUND ELEVATION 512.81 ft amsl CASING ELEVATION 512.34 ft amsl LATITUDE 35.406029 LONGITUDE -80.113438 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER Stefan Smith DRILLING METHOD 8-1/4-in Hollow Stem Auger + SPT BACKFILL 2" Monitoring Well Installed BOREHOLE DIAMETER 8.25 in CORE SIZE NA MONITORING EQUIPMENT NA OUTER CASING NA WELL INSTALLED 06/27/2022 WELL STICKUP Flush Mount (Default), -0.47 ft DEVELOPMENT METHOD Surge with Submersible Pump WELL KEY NA RESULTS NA NOTES YIELD NA WATER LEVELS U At Drilling: 06/27/2022 7.00 ft bgs / Elev 505.81 ft amsl Temporary Well: NA End of Drilling: NA Well Top of Casing : 09/08/2022 4.22 ft TOC/ Elev 508.12 ft amsl Er After Drilling: 06/28/2022 4.60 ft bgs / Elev 508.21 ft amsl NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM Orange Brown, Clayey SILT, with Gravel, Topsoil at surface (RESIDUAL SOIL) 4.0ft 508.8— — — — _ — — — — —503— _ _ — — 25 so 100 100 2-3-2-3 (5) 2-3-3-8 (6) 15-20-50/0. 4' so/0.3' 4 / Grout 2" ID Solid PVC Riser 1 Bentonite Chips I Sand — 5— — — — _\� —,o—. — —` \ iOrange Brown, Silty CLAY, Moist to Wet, Some gravel 4-6' bgs op ofCasi (RESIDUAL SOIL) 8.5 ft 504.3 _ — 11 Ili` I \ ' \kci ,Jj15.0ft Gray, PARTIALLY -WEATHERED ROCK, Wet (WEATHERED ROCK) 497.8— _ _ Slotted PVC Screen 15 End of Monitoring Well at 15.0 feet Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-208 \i `� `\ 2704 Cherokee Farm Way PAGE 1 OF 2 Suite 101 _ _ _` Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 08/05/2022 DATE COMPLETED 08/05/2022 CEC FIELD REPRESENTATIVE AJK REVIEWED BY MWW GROUND ELEVATION 516.29 ft amsl CASING ELEVATION 518.76 ft amsl LATITUDE 35.406075 LONGITUDE -80.116784 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER John Eisenman DRILLING METHOD 8-3/8-in Hollow Stem Auger/Air Rotary BACKFILL 2" Monitoring Well Installed BOREHOLE DIAMETER 8.38 in CORE SIZE NA MONITORING EQUIPMENT NA OUTER CASING NA WELL INSTALLED 08/05/2022 WELL STICKUP Stickup + Marker, 2.47 ft DEVELOPMENT METHOD Surge with Submersible Pump WELL KEY NA RESULTS NA NOTES YIELD NA WATER LEVELS U At Drilling: 08/05/2022 12.80 ft bgs / Elev 503.49 ft amsl Temporary Well: NA End of Drilling: NA Well Top of Casing : 09/08/2022 10.76 ft TOC/ Elev 508.00 ft amsl Er After Drilling: NA NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) BLOW COUNTS (N VALUES) WELL DIAGRAM v — —L - — - — — 5 l lo.5ft Dark Brown, Sandy Root Material, Moist -, Loose, Grass on top 515.8— — — - - — — — — — — — —507- — — — — 40-50/0.4' l Grout \ \2.5ft \(TOPSOIL) Red and Yellow, Silty CLAY, with Gravel, and Sand, Moist, Stiff, CL-Fill, RX are angular to sub -angular, flat pieces of meta-mudstone (FILL) 513.8— \ \ \5.0 Red, Silty CLAY, Trace Sand, Moist, Very Stiff, (RESIDUAL SOIL) ft 510.3 — — — — - —10 —15— — — — — \ \ \Top \ \ \ \\ \ \ \ Gray, Silty CLAY, Moist -, Hard, Redox features are rusty red along bedding planes (SAPROLITE) y of Casing 2" ID Solid PVC Riser 1 Bentonite trnntini Ind nioYf pnno1 Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-208 2704Suite Cherokee101 Farm Way PAGE 2 OF 2 Knoxville, TN 37920 Park LLC PROJECT NAME Badin Business Park �`� _ `� _ `_` \ CLIENT PROJECT Badin Business NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) BLOW COUNTS (N VALUES) WELL DIAGRAM - -\ 20.0 9 Gray, Silty CLAY, Moist -, Hard, Redox features are rusty red along bedding planes (SAPROLITE) 496.3 — - -497 — - — — — — — — - -487- -477- Chips Sand 20 - —\( — ��\11i` -25-\ - \ �' \��� V ' 26.0ft Partially weathered rock - Typ. meta-mudstone weathered (WEATHERED ROCK) 490.3 _1 — - 2" ID 0.01" Slotted PVC Screen - -;.1� - - - -30- -35- - - -40- -45- 7.68 Meta-mudstone, water at 26' at time of drilling (WEATHERED ROCK) 488.7 End of Monitoring Well at 27.6 feet Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-209 \tin `� `_\ 2704 Cherokee Farm Way PAGE 1 OF 3 Suite 101 _ _ _` Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 08/04/2022 DATE COMPLETED 08/04/2022 CEC FIELD REPRESENTATIVE DC REVIEWED BY MWW GROUND ELEVATION 521.86 ft amsl CASING ELEVATION 524.74 ft amsl LATITUDE 35.407018 LONGITUDE -80.118123 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER Zach Thompson DRILLING METHOD 8-3/8-in Hollow Stem Auger/Air Rotary BACKFILL 2" Monitoring Well Installed BOREHOLE DIAMETER 8.38 in CORE SIZE NA MONITORING EQUIPMENT NA OUTER CASING NA WELL INSTALLED 08/04/2022 WELL STICKUP Stickup, 2.88 ft DEVELOPMENT METHOD Surge with Submersible Pump WELL KEY NA RESULTS NA NOTES YIELD NA WATER LEVELS U At Drilling: 08/04/2022 47.00 ft bgs / Elev 474.86 ft amsl Temporary Well: NA End of Drilling: NA Well Top of Casing : 09/08/2022 12.85 ft TOC/ Elev 511.89 ft amsl Er After Drilling: NA NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery BLOW COUNTS (N VALUES) WELL DIAGRAM �45' — — ••, ••• • • • • • • • • • • • • 0 Tan and Orange, SAND, with Gravel, Dry, (FILL) 5.811 516.1 — — — — — �12— — — - - — — — — 100 60 70 40 50 6-6-29-50 (35) 17-25-46-50 (71) 15-28-45-50 /0.3' (73) 25-50/0.4' 18-28-50/0. 4' -. Orangish Brown, Clayey SILT, Dry, Red and black oxide staining (SAPROLITE) 513.9— — —10—\ _.4 —15� - _A15.5ft — —1\\i ti 1 \\\11, .11% \� - \ \( `` Dry, PARTIALLY WEATHERED ROCK with black to red oxide staining (WEATHERED ROCK) Top of Casing 506.4 Gray, METAMUDSTONE (WEATHERED ROCK) !r nnfini icrl Alovf Porrol Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-209 PAGE 2 OF 3 Badin Business Park `\ CLIENT PROJECT `� `_\ 2704Suite Cherokee101 Farm Way _ _ _` Knoxville, TN 37920 Badin Business Park LLC PROJECT NAME NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM MATERIAL DESCRIPTION — � 11�, Gray, METAMUDSTONE (WEATHERED ROCK) — — - -\�\1 — — 1 Grout —20—\ 11i' 111 , —502- - —‘ )(1 2" ID Solid PVC Riser — \\.\1 \` --,1--A, —25-1., V - - Al' --\\\W -- \ lll` —492— --NN -\Ill -- v., , -35-k(f - - —-\\\11l' 1 -- \\\11l' \l' — — 4 Bentonite —40-7 Paz \\\11l' — — — -\11 l` --� -- _ --\\\11l' -- - -45-V�\ill l —_ — —\ l\l' — — I Sand Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-209 PAGE 3 OF 3 Badin Business Park �`� _ `� _ `_` \ 2704Suite Cherokee101 Farm Way CLIENT PROJECT Knoxville, TN 37920 Badin Business Park LLC PROJECT NAME NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM MATERIAL DESCRIPTION — —7\ Ali` Gray, METAMUDSTONE (WEATHERED ROCK) — — Slotted PVC _ Screen — — 1 — — _ \�111' — -50-, 1�� --472- _ AI 52.06 469.9- - End of Monitoring Well at 52.0 feet -55- -60-62- -65- -70- -452- -75- - - Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-210 `m `m `� 1 2704 Cherokee Farm Way PAGE 1 OF 2 _ _ _ ` Suite 101 Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 08/03/2022 DATE COMPLETED 08/03/2022 CEC FIELD REPRESENTATIVE DC REVIEWED BY MWW GROUND ELEVATION 521.78 ft amsl CASING ELEVATION 524.76 ft amsl LATITUDE 35.404681 LONGITUDE -80.118712 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER Zach Thompson DRILLING METHOD 8-3/8-in Hollow Stem Auger/Air Rotary BACKFILL 2" Monitoring Well Installed BOREHOLE DIAMETER 8.38 in CORE SIZE NA MONITORING EQUIPMENT NA OUTER CASING NA WELL INSTALLED 08/03/2022 WELL STICKUP Stickup, 2.98 ft DEVELOPMENT METHOD Surge with Submersible Pump WELL KEY NA RESULTS NA NOTES YIELD NA WATER LEVELS U At Drilling: 08/03/2022 26.00 ft bgs / Elev 495.78 ft amsl Temporary Well: NA = End of Drilling: NA Well Top of Casing : 09/08/2022 13.14 ft TOC/ Elev 511.62 ft amsl Er After Drilling: 08/04/2022 23.50 ft bgs / Elev 498.28 ft amsl NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM Es 5• :.. Gray, SAND AND GRAVEL, (FILL) 5.0 ft 516.8 — — 512— — — — — — — — — — - - 80 80 75 so 85 15-28-45-50 (73) 3-10-42-50/ 0 4' (52) 4-25-39-27 (64) 15-50/0.4' 8-31-50/0.4' 4— 1 Grout 2" ID Solid PVC Riser I Bentonite — — Grayish Tan to Orangish Brown, Clayey SILT, with Sand, Dry, Red, black, and silver oxide staining and nearly horizontal structure noted in 5-7 interval (SAPROLITE) 10.oft 511.8 10 1 '' Top of Casing Gray, Dry, PARTIALLY WEATHERED ROCK (WEATHERED ROCK) 11.0ft 510.8— — Orangish Brown, Clayey SILT, Dry, (SAPROLITE) 12.0 ft 5o9.8 — —15� — — —.' �� \\\lII �,i \\1 4 � 1 I 'I� \ Gray to Tannish Gray, Dry, PARTIALLY WEATHERED ROCK; black oxide staining from 13-15'; red oxide staining from 15-17' (WEATHERED ROCK) (C`nnfiniiod Alcvf Pnncl Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-210 PAGE 2 OF 2 Badin Business Park �`� _ `� _ `_` \ 2704Suite Cherokee101 Farm Way CLIENT PROJECT Knoxville, TN 37920 Badin Business Park LLC PROJECT NAME NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM MATERIAL DESCRIPTION — � 11' Gray to Tannish Gray, Dry, PARTIALLY WEATHERED ROCK; black from 13-15'; from — — 100 36-50 1 [ oxide staining red oxide staining 15-17' (WEATHERED ROCK) — — -20-` 1�l` - �\22.06 499.8- - _ - \ \ Gray, METAMUDSTONE (WEATHERED ROCK) — — _ \ c ——\111 — — _ _ I Sand -25-\ 11 ' —� 2" ID 0.01" — —1 �f ���� _ — Slotted PVC Screen _ _4_.., __\\IN I, \' 111, 30.0 6 491.8-492- _ _ - 30 End of Monitoring Well at 30.0 feet -35- -40- -482- -45- Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-211 �`� `u `\ 2704Suite Cherokee101 Farm Way PAGE 1 OF 2 _ _ _` Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 08/02/2022 DATE COMPLETED 08/03/2022 CEC FIELD REPRESENTATIVE DC REVIEWED BY MWW GROUND ELEVATION 523.16 ft amsl CASING ELEVATION 525.18 ft amsl LATITUDE 35.404720 LONGITUDE -80.121901 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER Zach Thompson DRILLING METHOD 8-1/4-in Hollow Stem Auger + SPT BACKFILL 2" Monitoring Well Installed BOREHOLE DIAMETER 8.25 in CORE SIZE NA MONITORING EQUIPMENT NA OUTER CASING NA WELL INSTALLED 08/02/2022 WELL STICKUP Stickup, 2.02 ft DEVELOPMENT METHOD Surge with Submersible Pump WELL KEY NA RESULTS NA NOTES YIELD NA WATER LEVELS U At Drilling: 08/02/2022 26.50 ft bgs / Elev 496.66 ft amsl Temporary Well: NA End of Drilling: NA Well Top of Casing : 09/08/2022 20.70 ft TOC/ Elev 504.48 ft amsl Er After Drilling: 08/03/2022 24.60 ft bgs / Elev 498.56 ft amsl NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM �41' —5— — — -10— 112.0ft Orangish Brown, Clayey SILT, Topsoil at surface; Cuttings noted to transition to saprolite approaching 12' (RESIDUAL SOIL) 511.2 — — —514- — — — — — — 100 80 60 23-46-50/0. 2 29-39-50/0. 4' 26-50 / Grout — —15- — ��\ --1 \ ` � \\\11l \ V �f 11 IE-- Tannish Gray to Gray, Dry, PARTIALLY WEATHERED ROCK; Black and red oxide staining observed from 12-15' (WEATHERED ROCK) / 2" ID Solid PVC Riser fr^nnfini icri Alov4 Form\ Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-211 PAGE 2 OF 2 Badin Business Park `\ CLIENT PROJECT `� `_\ 2704Suite Cherokee101 Farm Way _ _ _ ` Knoxville, TN 37920 Badin Business Park LLC PROJECT NAME NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM MATERIAL DESCRIPTION — Tannish Gray to Gray, Dry, PARTIALLY WEATHERED ROCK; Black and red oxide staining observed from 12-15' (WEATHERED ROCK) so 43-50/0.3' Top of Casing — — \ —504— \\�11 100 31-50 -. —20—\ 1\ l _ _ �� / Bentonite _ .11k` —25—\ 11� — ——1���f^ — — — I Sand " \ \i `1 _� 2" ID 0.01 Slotted PVC — —; - — — _ Screen — —\\IN —494 _ 1f1� \It.30.0fl 493.2 30 End of Monitoring Well at 30.0 feet — — 7 — — - -35— — — —484- -40- -45— Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-212 \i `� `\ 2704 Cherokee Farm Way PAGE 1 OF 2 Suite 101 _ _ _` Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 08/02/2022 DATE COMPLETED 08/02/2022 CEC FIELD REPRESENTATIVE DC REVIEWED BY MWW GROUND ELEVATION 517.83 ft amsl CASING ELEVATION 520.31 ft amsl LATITUDE 35.403388 LONGITUDE -80.121320 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER Zach Thompson DRILLING METHOD 8-3/8-in Hollow Stem Auger/Air Rotary BACKFILL 2" Monitoring Well Installed BOREHOLE DIAMETER 8.38 in CORE SIZE NA MONITORING EQUIPMENT NA OUTER CASING NA WELL INSTALLED 08/02/2022 WELL STICKUP Stickup, 2.48 ft DEVELOPMENT METHOD Surge with Submersible Pump WELL KEY NA RESULTS NA NOTES YIELD NA WATER LEVELS U At Drilling: 08/02/2022 31.90 ft bgs / Elev 485.93 ft amsl Temporary Well: NA End of Drilling: NA Well Top of Casing : 09/08/2022 17.10 ft TOC/ Elev 503.21 ft amsl Er After Drilling: 08/03/2022 28.00 ft bgs / Elev 489.83 ft amsl NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery BLOW COUNTS (N VALUES) WELL DIAGRAM �45' �� . • • • • • • . Gray to Black, GRAVEL, (FILL) 5.5 ft 512.3 — — — —50� — — — — — — 100 100 100 100 100 WOH-6-8-1 o (14) 6-8-13-25 (21) 11-15-32-50 /0.4' (47) 40-26-50 (76) 50/0.4' ~— Grout 2" ID Solid PVC Riser — — — — — — \ \ \ \ .9.0 Orange, Silty CLAY, Moist -, Dense, Topsoil observed at 5.5' (RESIDUAL SOIL) ft 508.8— —10— — — Orangish Brown, Clayey SILT, and Clay, Dry, Black oxide staining observed 9-11' (SAPROLITE) 13.08 504.8— ��\ i�13.7R Tannish Gray, Dry, PARTIALLY WEATHERED ROCK soa.z— — — _h\(WEATHERED ROCK) Orangish Brown, Clayey SILT, Dry, Black and silver oxide staining Top of Casing 15.0ft (SAPROLITE) 502.9 15 ` a � ,1( 1 I - -1�\l Tan to Gray, Dry, PARTIALLY WEATHERED ROCK (WEATHERED ROCK) fan to Gray, Clayey SILT, Dry, Black, purple, and silver oxide 17.s t[ — _ 1 staining (SAPROLITE) `— 5oo.s /rnnfin, icrl Mov4 Porvol Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-212 Cherokee101 Farm Way PAGE 2 OF 2 Knoxville, TN 37920 Park LLC PROJECT NAME Badin Business Park `� _ `\ CLIENT PROJECT `_\ 2704Suite _ _` Badin Business NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM MATEA L Tan to Gray, Clayey SILT, DryRI, Black, purpleDESCRIPTION, and silver oxide — — 100 19-29-50 staining (SAPROLITE) (79) iss ft 498.3 100 18-50/0.4' Tannish Gray to Gray, Dry, PARTIALLY WEATHERED ROCK —498— _\ —20 \ 11i‘ (WEATHERED ROCK) 100 34-50/0.3' — _\�\11t` - - 100 41-50/0.3' — —� \ill —25-1 — — - -�\ill(' \ \\\t. - - I Bentonite 1 (28.0ft I 489.8— — — ���� Gray, METAMUDSTONE (WEATHERED ROCK) — J\\�111' - - —30— \ 1\l` \ —488— A — -�\ ��l ' —— — __ I Sand -4 2" ID 0.01" — — \\\ — — Slotted PVC \ �� h ` = Screen — 1`� 35.0 ft 482.8— — 35 End of Monitoring Well at 35.0 feet —40— —47� —45— Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-213 �`� _ `� _ `_` \ 2704Suite Cherokee101 Farm Way PAGE 1 OF 4 Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 06/29/2022 DATE COMPLETED 08/04/2022 CEC FIELD REPRESENTATIVE DC REVIEWED BY MWW GROUND ELEVATION 517.79 ft amsl CASING ELEVATION 520.46 ft amsl LATITUDE 35.401662 LONGITUDE -80.119350 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER Zach Thompson DRILLING METHOD 8-3/8-in Hollow Stem Auger/Air Rotary BACKFILL 2" Monitoring Well Installed BOREHOLE DIAMETER 8.38 in CORE SIZE NA MONITORING EQUIPMENT NA OUTER CASING NA WELL INSTALLED 08/04/2022 WELL STICKUP Stickup, 2.67 ft DEVELOPMENT METHOD Surge with Submersible Pump WELL KEY NA RESULTS NA NOTES YIELD NA WATER LEVELS U At Time of Drilling: NA Temporary Well: NA = End of Drilling: 08/02/2022 19.90 ft bgs / Elev 497.89 ft amsl Well Top of Casing : 09/08/2022 22.90 ft TOC/ Elev 497.56 ft amsl After Drilling: NA NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery BLOW COUNTS (N VALUES) WELL DIAGRAM �45' Orange to Brown, Silty SAND, Topsoil at surface (RESIDUAL SOIL) 4.0ft 513.8— — — — — — —508— - - — — — — -- 100 100 100 100 100 100 100 7 42-so/o.3' 19-44-31-50 /0.3' 25-50/0.3' 45-50/0.4' 37-50/0.4' 12-50/0.3' 50/0.2' — 51 — — — —10—\ — _ —15\ — --1� II I , I `.4.7ft �` Orange, Clayey SILT, Dry, (RESIDUAL SOIL) 513.1 A \ Ili. \a , \ �� 4: 1--:' 1 \ \11� ](f \`ti Gray, Dry, PARTIALLY WEATHERED ROCK, Dark red, black, and silver oxide staining (WEATHERED ROCK) ff nnfini icrJ Aiovf Pono1 Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-213 2704Suite Cherokee101 Farm Way PAGE 2 OF 4 Knoxville, TN 37920 Park LLC PROJECT NAME Badin Business Park `\ CLIENT PROJECT `� `_\ _ _ _` Badin Business NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM — 11 1 19.0ft Gray, Dry, PARTIALLY WEATHERED ROCK, Dark red, black, and silver oxide staining (WEATHERED ROCK) y Gray, METAMUDSTONE (WEATHERED ROCK) Casing 498.8— — — — —498- — — — -- — — - - — — was — - — — — - —478— _ —— _ _ / 1 Grout -20—` — _1 - _ - -..\--.\-1:: —25-1 - — so — --NN - —: —35—\ ——'1' _ — — 40— _ -_\\\k __of —45-1N• -— ..c.! l 1�1�Top _. ' Ill` :Ili` Al'- V 'cl \ Wk \�111` li' � i ��_ Ak' 1\t` A_:4` ‘,f , l. ,,; of irnnfini Ind Alov4 Pnno\ Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-213 PAGE 3 OF 4 Badin Business Park `\ CLIENT PROJECT `� `_\ 2704Suite Cherokee101 Farm Way _ _ _` Knoxville, TN 37920 Badin Business Park LLC PROJECT NAME NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM MATERIAL DESCRIPTION — � 11i, Gray, METAMUDSTONE (WEATHERED ROCK) — — — - — — Ai' -468- -50-\ I\\' - -'� - - -\\�111, - - :Ili` -55-4l - - 1 �f _ _ 4 Bentonite _ _ _,,\,, AV ;4_.., _ v,, -458- - - -NN Ili` - - _ _ - v.�' : Ili` - - - _ _85-���f - - - wA�111' _ _ - A(\%\li - I Sand Ak' — �\ 1t' — Slotted PVC —70— 1 as— _ Screen _ \ \' — — - -�,a' -- _. A(Wi __- -75\\\i1i - --:Ili' _ - -"\, _ irnnfini Ind Aiov4 Pnno\ Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-213 PAGE 4 OF 4 Badin Business Park `� _ `� _ _` `r` 2704Suite Cherokee101 Farm Way CLIENT PROJECT Knoxville, TN 37920 Badin Business Park LLC PROJECT NAME NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM MATERIAL DESCRIPTION _ — 1'\ Gray, METAMUDSTONE (WEATHERED ROCK) _ End of Monitoring Well at 78.5 feet — - -438- -80- -85- - -428- -90- -95- - - 100- --105- �18- Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-214 ` 2704`Cherokee Farm Way PAGE 1 OF 2 \ Suite 101 ukTr _ ` Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 06/28/2022 DATE COMPLETED 06/28/2022 CEC FIELD REPRESENTATIVE DC REVIEWED BY MWW GROUND ELEVATION 495.71 ft amsl CASING ELEVATION 495.35 ft amsl LATITUDE 35.399597 LONGITUDE -80.114490 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER Stefan Smith DRILLING METHOD 8-3/8-in Hollow Stem Auger/Air Rotary BACKFILL 2" Monitoring Well Installed BOREHOLE DIAMETER 8.38 in CORE SIZE NA MONITORING EQUIPMENT NA OUTER CASING NA WELL INSTALLED 06/28/2022 WELL STICKUP Flush Mount (Default), -0.36 ft DEVELOPMENT METHOD Surge with Submersible Pump WELL KEY NA RESULTS NA NOTES YIELD NA WATER LEVELS U At Drilling: 06/28/2022 29.60 ft bgs / Elev 466.11 ft amsl Temporary Well: NA End of Drilling: NA Well Top of Casing : 09/08/2022 10.12 ft TOC/ Elev 485.23 ft amsl Er After Drilling: 06/29/2022 9.50 ft bgs / Elev 486.21 ft amsl NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM Orange Brown, Sandy SILT, and Clay, Dry, Topsoil at surface (RESIDUAL SOIL) s.o n 490.7— — — — — �8� -- - - — — 100 17-322 50/0. 4 I Grout 5 — —$ — --\ ---v —,0—.1� __A, - —N:' —1s� - - -_4 `\. 111 A\11; ( 11�' 1 ( ( 1` . mIE-- Gray, METAMUDSTONE (WEATHERED ROCK) y Top of Casing 2" ID Solid PVC Riser frnnfini icri Alovf Pono1 Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-214 PAGE 2 OF 2 Badin Business Park `\ CLIENT PROJECT `� `_\ 2704Suite Cherokee101 Farm Way _ _ _` Knoxville, TN 37920 Badin Business Park LLC PROJECT NAME NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM MATERIAL DESCRIPTION — 1`, Gray, METAMUDSTONE (WEATHERED ROCK) — - -,- 41 —476— —20—\ \l`, --'� - -\\\111` - - - -A(' -25-\ \l - -1AV �f - - — —\ 1�1` - - 1 Bentonite Chips ——N\\11\` — — \ W —466— \\1 - I Sand \\l' I -/ — 2" ID 0.01" Slotted PVC — — - ` A _ _ Screen 1`\� 35.05 460.7 35 End of Monitoring Well at 35.0 feet -456- —40— —45— Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-215 2704 Cherokee Farm Way PAGE 1 OF 2 Suite 101 Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 08/08/2022 DATE COMPLETED 08/08/2022 CEC FIELD REPRESENTATIVE MWW REVIEWED BY MWW GROUND ELEVATION 529.72 ft amsl CASING ELEVATION 532.70 ft amsl LATITUDE 35.404522 LONGITUDE -80.124640 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER Richy Lemire DRILLING METHOD 8-1/4-in Hollow Stem Auger + SPT BACKFILL 2" Monitoring Well Installed BOREHOLE DIAMETER 8.25 in CORE SIZE NA MONITORING EQUIPMENT NA OUTER CASING NA WELL INSTALLED 08/08/2022 WELL STICKUP Stickup, 2.98 ft DEVELOPMENT METHOD Surge with Submersible Pump WELL KEY NA RESULTS NA NOTES YIELD NA WATER LEVELS U At Time of Drilling: NA Temporary Well: NA = End of Drilling: NA Well Top of Casing : 09/08/2022 27.60 ft TOC/ Elev 505.10 ft amsl Er After Drilling: NA NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM iss — — — — 0.5ft Brown, No odor, Dry, Soft to Medium Stiff, (TOPSOIL) 529.2 — — — — — 100 100 100 3-5-11-17 (16) 7-1 (420)31 4-11-15-16 (26) I 4 Grout ♦♦ ; ♦ . ♦ • ♦ • . Reddish Brown, Silty CLAY, Trace Cobbles, No odor, Dry, Medium Stiff, (FILL) 3.0 ft 526.7 — — — — Mottled Reddish Brown to Orangish Brown, Silty CLAY, No odor, Dry, Very Stiff, Minor oxide stained seams (SAPROLITE) 10.0 ft 519.7-52°— 10 —15— — — Reddish Brown, Silty CLAY, No odor, Dry, Very Stiff to Hard, Weathering seams from 10 to 30 degrees, Increase silt content with depth (RESIDUAL SOIL) (C`nnfiniiod Alcvf Pnncl Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-215 `� `_\ 2704Suite Cherokee101 Farm Way PAGE 2 OF 2 _ _ _ ` Knoxville, TN 37920 `\ CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM 1fi.oft Reddish Brown, Silty CLAY, No odor, Dry, Very Stiff to Hard, 511.7— — — — —510- — — — - - — — — — —500- _ — — - — — — — 100 100 100 100 10-24-50/0. 4 11-28-50/0. 2' 13 28 13 20 (41) 17-50/0.2' - " 2" ID Solid PVC Riser 1 Bentonite Chips I Sand _ — — -20— \ \ \ _ _ Weathering seams from 10 to 30 degrees, Increase silt content with I IldepthjRESIDUAL SOIL) Mottled Reddish Brown, Silty CLAY, No odor, Dry, Hard, (SAPROLITE) 21.0 ft 508.7— _ — �\1 — — —" --:V -V .11� 1 Al‘ 1,29.0ft Orangish Brown to Tannish Brown, No odor, Dry, Minor oxide stained seams (WEATHERED ROCK) �\\\??`Top of Casing 500.7 Mottled Greenish Brown to Orangish Brown, No odor, Moist -, Hard, Trace laminations, Oxide stained seams near horizontal (SAPROLITE) 33.0 ft 496.7 -30— — — — — \ - —.11i' —35—\�f_ — —\' —/2"ID0.01" - l� \ \�\1�i I,\ \�t . \ 1(�40.0 Blueish Gray, No odor, Moist +, Meta-argillite parent (WEATHERED ROCK) ft 489.79� —_ Slotted PVC Screen n40 —45— End of Monitoring Well at 40.0 feet Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-216 �`� _ `� _ `i`_` 2704Suite Cherokee101 Farm Way PAGE 1 OF 3 Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 08/09/2022 DATE COMPLETED 08/09/2022 CEC FIELD REPRESENTATIVE MWW REVIEWED BY MWW GROUND ELEVATION 516.30 ft amsl CASING ELEVATION 518.84 ft amsl LATITUDE 35.402552 LONGITUDE -80.122674 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER Richy Lemire DRILLING METHOD 8-1/4-in Hollow Stem Auger + SPT BACKFILL 2" Monitoring Well Installed BOREHOLE DIAMETER 8.25 in CORE SIZE NA MONITORING EQUIPMENT NA OUTER CASING NA WELL INSTALLED 08/09/2022 WELL STICKUP Stickup, 2.54 ft DEVELOPMENT METHOD Surge with Submersible Pump WELL KEY NA RESULTS NA NOTES YIELD NA WATER LEVELS U At Time of Drilling: NA Temporary Well: NA = End of Drilling: NA Well Top of Casing : 09/08/2022 46.60 ft TOC/ Elev 472.24 ft amsl Er After Drilling: NA NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery BLOW COUNTS (N VALUES) WELL DIAGRAM �45' V — _; — — —. — —' — — —10—' — — — r. :' 0.5n Brown, No odor, Dry, Soft to Medium Stiff, (TOPSOIL) 515.8— — — — — — — — — —507— — — — — — — — — — 100 75 25 7-6-6-7 (12) 4-4-5-5 (9) 6-7-9-11 (16) J ♦♦ � • • ; ♦• ♦.• ♦♦ • • ♦♦ ' `♦♦:• ♦♦;,. • ♦♦ • • •• ♦ :: • •♦ .• : ♦♦. ♦• ♦.• . • Reddish Brown, Silty CLAY, with Sand, Trace Weathered Rock Fragments, No odor, Dry, Stiff, Brick fragments at 11' (FILL) 11.5 ft 504.8— ;' Dark Gray, Silty CLAY, with Gravel -sized Rock Fragments, Trace Organics, No odor, Moist, Stiff, (FILL) 15.0ft 501.3 15 . Orangish Brown, Silty CLAY, No odor, Moist, Very Stiff, (FILL) 16.0 ft 500.3 • • Dark Gray, SAND AND SILT, with Gravel, No odor, Moist to Wet, Loose, Carbonaceous, Saturated between 20 and 22' (FILL) I nnfin, icr1 Mov4 P �1 Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-216 PAGE 2 OF 3 Badin Business Park �`� `� `i` 2704Suite Cherokee101 Farm Way _ _ _` CLIENT PROJECT Knoxville, TN 37920 Badin Business Park LLC PROJECT NAME NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM MATERIAL DESCRIPTION Dark Gray, SAND AND SILT, with Gravel, No odor, Moist to Wet, Loose, Carbonaceous, Saturated between 20 and 22' (FILL) — - Grout -497 —20— ' — — 100 6-3-6-5 — — (9) —25—; 4 2" ID Solid 25.5ft 490.8— — PVC Riser — Reddish Brown, Silty CLAY, No odor, Dry to Moist, Stiff, (RESIDUAL 100 5-6-5-8 SOIL) — — (11) — — —487- -30— J 31.oft 485.3 100 11-15-20-29 Blueish Gray, Silty CLAY, No odor, Dry, Hard to Very Hard, Minor oxide stained seams at 70 to 80 degrees, Decrease weathering with — — (35) depth (SAPROLITE) — — 34.0 5 482.3 \ 1 Blueish Gray, No odor, Dry to Wet, Oxide stained seams near vertical, Meta-argillite parent (WEATHERED ROCK) — — —35-1 100 32-50/0.4' ——'\\11l` —\ - _Z.I. —40— — AA v � 77— 100 21-50/0.5' Bentonite Chips — —ANI 11 — \ Top of Casing — — .i' —45—\�\i1i 100 19-50/0.5' /rnntini Ind Aiov4 pnno\ Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-216 PAGE 3 OF 3 Badin Business Park ` \ CLIENT PROJECT `� `_\ 2704Suite Cherokee101 Farm Way _ _ _` Knoxville, TN 37920 Badin Business Park LLC PROJECT NAME NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM MATERIAL DESCRIPTION — —. 11`, Blueish Gray, No odor, Dry to Wet, Oxide stained seams near f vertical, Meta-argillite parent (WEATHERED ROCK)— — \111 I Sand -50-\ I�I — al: - - - 4\\\\k _ --\\ll`: - - - 2" ID 0.01" —55-- 11l' — — — Slotted PVC —1 �f _ Screen - _a, s tip\59.5 ft 456.6-457- - - - -60- End of Monitoring Well at 59.5 feet 7 — - -65- - - -447- -70- -75- Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-217 �`� _ `� _ _` `i` 2704Suite Cherokee101 Farm Way PAGE 1 OF 2 Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 08/04/2022 DATE COMPLETED 08/05/2022 CEC FIELD REPRESENTATIVE AJK REVIEWED BY MWW GROUND ELEVATION 522.05 ft amsl CASING ELEVATION 524.82 ft amsl LATITUDE 35.412018 LONGITUDE -80.117352 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER John Eisenman DRILLING METHOD 8-3/8-in Hollow Stem Auger/Air Rotary BACKFILL 2" Monitoring Well Installed BOREHOLE DIAMETER 8.38 in CORE SIZE NA MONITORING EQUIPMENT NA OUTER CASING NA WELL INSTALLED 08/04/2022 WELL STICKUP Stickup, 2.77 ft DEVELOPMENT METHOD Surge with Submersible Pump WELL KEY NA RESULTS NA NOTES YIELD NA WATER LEVELS U At Drilling: 08/04/2022 20.40 ft bgs / Elev 501.65 ft amsl Temporary Well: NA End of Drilling: NA Well Top of Casing : 09/08/2022 10.55 ft TOC/ Elev 514.27 ft amsl Er After Drilling: 08/05/2022 7.10 ft bgs / Elev 514.95 ft amsl NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM �45' V 0.5ft Gravel surfacing (FILL) 521.6 — — - - — — —513— — — — — — — _ 66 8 -- -- -- 1-2-1-3 (3) 1-3-5-7 (8) 7-6-9-11 (15) 5-7-2-1 (9) 2-11-13-5 (24) 1-1-50/0.4' 1 Grout • • Mottled Brown to Black, Silty SAND AND CLAY, Moist - to Moist, Loose to Soft, Odor (FILL) 6.0 ft 517.0_ 5 — — — — — — — —10— — — — — • • • Black, Wet, Soft, Sandy sludge, liquid, Slimy + Odor - carbonaceous, Lower 6" - 12.5'-13': gray slimy clay (FILL) 7 Top of Casing 13.0 ft 509.0 , 2" ID Solid PVC Riser s Chi Bentonite p —15— Mottled Tan and Yellow, Silty CLAY, Moist, Hard, Ranges from CL to weathered rock with depth. Black and rusty red redox features within + cross -bedding (SAPROLITE) 16.0 ft /Partially weathered rock - Typ. meta-mudstone weathered. \ 506.0 \\ �. 1�N` (WEATHERED ROCK) 17.on /Meta-mudstone - Typ. fracture pattern at 20'-21' (WEATHERED \ 60s.0 WIC ROCK) frnnfini icr4 Mov4 Pono1 Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-217 PAGE 2 OF 2 Badin Business Park �`� _ `� _ `_` \ 2704Suite Cherokee101 Farm Way CLIENT PROJECT Knoxville, TN 37920 Badin Business Park LLC PROJECT NAME NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM MATERIAL DESCRIPTION — —7� 11' Meta-mudstone - Typ. fracture pattern at 20'-21' (WEATHERED — — 1 [ ROCK) - - � _ -503- -20-\ 1�l' SZ — — -_ _ Sand — -\�\`11\, - - — —4 \ \1i1 2" ID 0.01" — --\���� \11??i, — — - - _ -_ Slotted PVC Screen 25 `\\1`l`25.0ft 497.0 - ,-, End of Monitoring Well at 25.0 feet - - -493- -30- - - -35- - - -483- -40- - - -45- - - Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-218 ``� `� `_\ 2704 Cherokee Farm Way PAGE 1 OF 2 \Suite 101 _ _ _` Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 06/21/2022 DATE COMPLETED 06/21/2022 CEC FIELD REPRESENTATIVE DC REVIEWED BY MWW GROUND ELEVATION 560.88 ft amsl CASING ELEVATION 563.52 ft amsl LATITUDE 35.410221 LONGITUDE -80.119946 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER Stefan Smith DRILLING METHOD 8-1/4-in Hollow Stem Auger + SPT BACKFILL 2" Monitoring Well Installed BOREHOLE DIAMETER 8.25 in CORE SIZE NA MONITORING EQUIPMENT NA OUTER CASING NA WELL INSTALLED 06/21/2022 WELL STICKUP Stickup, 2.64 ft DEVELOPMENT METHOD Surge with Submersible Pump WELL KEY NA RESULTS NA NOTES YIELD NA WATER LEVELS U At Drilling: 06/21/2022 39.00 ft bgs / Elev 521.88 ft amsl Temporary Well: NA End of Drilling: NA Well Top of Casing : 09/08/2022 30.04 ft TOC/ Elev 533.48 ft amsl Er After Drilling: 06/22/2022 23.00 ft bgs / Elev 537.88 ft amsl NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery BLOW COUNTS (N VALUES) WELL DIAGRAM �45' - 5 —10— o.3ft Gray TOPSOIL, Some Gravel, Dry, (TOPSOIL) 550.5 — — —551— — — — — — 75 10-14-23-33 (37) I Grout \ )\\\ ,— _ Orangish Brown to Brown, Clayey SILT, Some Gravel, Dry, Gravel decreases with depth (RESIDUAL SOIL) 13.0 ft 547.9— — ..1 7 - - Orange Brown, Fine Grained, Silty SAND, Dry, (RESIDUAL SOIL) 15.0ft 545.9— —15 — \ Orange Brown, Silty CLAY, Dry, Iron Oxide staining, Saprolitic (SAPROLITE) 17.0 ft 543.9— — Orange Brown, Clayey SILT, Dry, Saprolitic (SAPROLITE) frnnfini Ind Mcv+ Pono\ Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-218 `� `_\ 2704Suite Cherokee101 Farm Way PAGE 2 OF 2 _ " _ _` Knoxville, TN 37920 `\ CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM — — Orange Brown, Clayey SILT, Dry, Saprolitic (SAPROLITE) 1s.zft saz.z — — — — — — — — — — — — — — —53.- — — — �21— — — — — — — — 100 100 100 100 100 100 100 13-23-29-49 (52) 16-15-50/0. 4 26-39-32-50 /0.3' (71) 25-34-48-50 /0.3' (82) 4-28-45-50/ 0.3' (73) 24-34-50/0. 3' 19-37-50/0. 4' 4-- 2" ID Solid PVC Riser 1 Bentonite Chips `19.oft Orange Brown, Silty CLAY, Dry, Iron Oxide staining, Saprolitic 5479— _ l _—\(SAPROLITEI / 19.7ft Orar�e Brown, Clayey SILT, SaproliticjSAPROLITEJ 541.2 _ _ 2o.oft Gray,PARTIALLY-WEATHERED ROCK, Dry,Iron Oxide Staining_ 540.9_541_ \�1NEATHERED ROCK) / 21.0ft Orange Brown, SiItyCLAY, Saprolitic (SAPROLITE) 539.9— — — — _ Orange Brown, Silty CLAY, Dry, Saprolitic (SAPROLITE) 22.8 ft_ 538.1 _I "%— Gray, PARTIALLY -WEATHERED ROCK, Dry, Iron Oxide Staining r--3zg 23.5 R / 537.4 —25—'1 r OpNEATHERED ROCK) //r \Oranq Brown, Clayey SILT, Dry, Saprolitic LSAPROLITEL / Orange Brown, Silty CLAY, Dry, Transition Zone Material (SAPROLITE) 6.0 ft 534.2— — `\Z Gray, PARTIALLY -WEATHERED ROCK, Dry, Iron Oxide Staining 270ft y (WEATHERED ROCK 533.2— _ — —1r 11(ropofCasing k Tan to Gray, PARTIALLY -WEATHERED ROCK, Dry, Iron Oxide Staining (WEATHERED ROCK) 29.0 ft 531.2— — —30 \ 1��` \ 1 Tan to Gray, PARTIALLY -WEATHERED ROCK, Dry, (WEATHERED ROCK) 31.0 ft 529.9— —3s—�_ — — — —N: —40—! --.--4 — —1 \\Z t' \kx 11i1 \a Ai ' ��� ('43.0ft Gray, PARTIALLY -WEATHERED ROCK (WEATHERED ROCK) 517.2— _ 2"ID0.01" Slotted PVC Screen —45— End of Monitoring Well at 43.0 feet Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-219 \i `� `\ 2704 Cherokee Farm Way PAGE 1 OF 2 Suite 101 _ _ _` Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 06/20/2022 DATE COMPLETED 06/20/2022 CEC FIELD REPRESENTATIVE MWW REVIEWED BY MWW GROUND ELEVATION 563.10 ft amsl CASING ELEVATION 565.80 ft amsl LATITUDE 35.410681 LONGITUDE -80.119718 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER Stefan Smith DRILLING METHOD 8-1/4-in Hollow Stem Auger + SPT BACKFILL 2" Monitoring Well Installed BOREHOLE DIAMETER 8.25 in CORE SIZE NA MONITORING EQUIPMENT NA OUTER CASING NA WELL INSTALLED 06/19/2022 WELL STICKUP Stickup, 2.70 ft DEVELOPMENT METHOD Surge with Submersible Pump WELL KEY NA RESULTS NA NOTES YIELD NA WATER LEVELS U At Time of Drilling: NA Temporary Well: NA = End of Drilling: NA Well Top of Casing : 09/08/2022 32.19 ft TOC/ Elev 533.61 ft amsl Er After Drilling: NA NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery BLOW COUNTS (N VALUES) WELL DIAGRAM �45' v _ _ t �:'.p.5n Brown, No odor, Dry, Soft to Medium Stiff, Minor concrete and 562.E — — — — — — — — — �54— _ — — — — — — — _ 100 100 75 75 75 85 100 -3z s- ( 22) 3-11-22-31 (33) 5-17-45-50/ 0.3' (62) 6-20-21-31 (41) 10-23-23-28 (46) 7-28-31-31 (59) 16-27-45-50 /0.3' I 1 Grout \asphalt fill (TOPSOIL) / Reddish Brown, Clayey SILT, No odor, Dry, Medium Stiff, (RESIDUAL SOIL) 3.0 ft 560.1 —— \ \ Reddish Brown, Silty CLAY, No odor, Dry, Stiff, (RESIDUAL SOIL) ss6.1` s — — \s.oft `7 Mottled Reddish Brown and Tannish Brown, Silty CLAY, No odor, Dry, Very Stiff to Hard, Minor oxide stained seams (SAPROLITE) 0 n 556.1 — — — — — — — — —— — — —15— — — — — \ \ \ \ Orangish Brown, Silty CLAY, No odor, Dry, Very Stiff to Hard, Minor weathering seams (RESIDUAL SOIL) 11.5 ft 551.6 \ \ \\ \ \ Mottled Reddish Brown and Tannish Brown, Silty CLAY, No odor, Dry, Hard, Minor weathering seams at 60 to 70 degrees (SAPROLITE) 15.5 ft 547.6 \ \ \ Orangish Brown, Silty CLAY, No odor, Dry, Hard, Minor coarse sand- sized oxides (SAPROLITE) 17.5 ft 545.6 /f nnfin, ic,1 Mov4 17ono1 Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-219 2704Suite Cherokee101 Farm Way PAGE 2 OF 2 Knoxville, TN 37920 Park LLC PROJECT NAME Badin Business Park ``� `� _ \ CLIENT PROJECT `_\ _ _` Badin Business NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM MATERIAL DESCRIPTION — — Mottled Orangish Brown and Tannish Brown, Silty CLAY, No odor, (72) " 2" ID Solid Dry to Moist, Hard to Very Hard, Remnant lamination (SAPROLITE) — — PVC Riser — — \ —544— 100 19-28-33-50 10.5 ft 543.6 /0.4' —20— Mottled Reddish Brown and Tannish Brown, Silty CLAY, No odor, Dry, Hard to Very Hard, Increase in weathering at 20.5', block — — (61) — — \ texture at depth (SAPROLITE) — — 100 12-27-34-50 /0.4' — — \ — (61) 22.5 ft 540.6 100 15-50/0.3' \ 0. Tannish Brown to Tannish Gray, No odor, Dry to Moist, Meta-argillite r parent (WEATHERED ROCK) — — \11i 100 32-50/0.2' —25—\ 1t — — ,26.0 ft Blueish Gray to Tannish Gray, No odor, Dry to Moist, Meta-argillite 537.1 — — 100 50/0.3' — - �� parent (WEATHERED ROCK) 1 — 100 50/0.4' — J\ —534— 'k1 Woo of Casing —30— \ 1— — 100 50/0.2' i \N 1 Bentonite — 11i - - Chips --:\\i, Av -- —35 �i, — — — —\�\ C — — I - �11i' f — ^4 Sand 2" ID 0.01" — At; — — Slotted PVC Screen — �24— �\``\1 -40.0 1i(e ft 523.1 — n40 End of Monitoring Well at 40.0 feet —— —45— — — Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER MW-220 �`� _ `� _ `_` \ 2704Suite Cherokee101 Farm Way PAGE 1 OF 1 Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 06/16/2022 DATE COMPLETED 06/16/2022 CEC FIELD REPRESENTATIVE MWW REVIEWED BY MWW GROUND ELEVATION 522.06 ft amsl CASING ELEVATION 524.59 ft amsl LATITUDE 35.407700 LONGITUDE -80.120485 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER Stefan Smith DRILLING METHOD Sonic Drilling BACKFILL 2" Monitoring Well Installed BOREHOLE DIAMETER 6.00 in CORE SIZE NA MONITORING EQUIPMENT NA OUTER CASING NA WELL INSTALLED 06/16/2022 WELL STICKUP Stickup, 2.53 ft DEVELOPMENT METHOD Surge with Submersible Pump WELL KEY NA RESULTS NA NOTES YIELD NA WATER LEVELS U At Time of Drilling: NA Temporary Well: NA = End of Drilling: NA Well Top of Casing : 09/08/2022 8.42 ft TOC/ Elev 516.17 ft amsl Er After Drilling: NA NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) WELL DIAGRAM u — ' ♦♦ , • ♦• , • ♦♦ • : ♦♦ • :♦♦• • ♦♦ ' •�♦• •'♦♦ ^'5.0ft Tannish Brown, Gravel -Sized CONCRETE, No odor, Dry, (FILL) 517.1 — — —513— — — — — — — L 4 4 Grout 5 �• y Tannish Brown, CONCRETE, No odor, Dry, (CONCRETE) Top of Casing s1s.1— — — — ' Tannish Brown to Dark Brown, Gravel -Sized CONCRETE, with Sand, and Clay, No odor, Dry to Moist, (FILL) 10.0ft 512.E 10 —� — — —15�( 1 �( VA\11,' \k,c( ` �1i� �\�,\16.0ft --- Blueish Gray, No odor, Moist to Wet, Meta-argillite parent (WEATHERED ROCK) 506.1 _ 4 2" ID 0.01" Slotted PVC Screen End of Monitoring Well at 16.0 feet Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER PZ-18RD �`� _ `� _ `i`_` 2704Suite Cherokee101 Farm Way PAGE 1 OF 2 Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 08/08/2022 DATE COMPLETED 08/08/2022 CEC FIELD REPRESENTATIVE MWW REVIEWED BY MWW GROUND ELEVATION 474.41 ft amsl CASING ELEVATION 476.94 ft amsl LATITUDE 35.402194 LONGITUDE -80.123789 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER Richy Lemire DRILLING METHOD 8-1/4-in Hollow Stem Auger + SPT BACKFILL 2" Monitoring Well Installed BOREHOLE DIAMETER 8.38 in CORE SIZE NA MONITORING EQUIPMENT NA OUTER CASING NA WELL INSTALLED 08/08/2022 WELL STICKUP Stickup, 2.53 ft DEVELOPMENT METHOD Surge with Submersible Pump WELL KEY NA RESULTS NA NOTES YIELD NA WATER LEVELS U At Time of Drilling: NA Temporary Well: NA = End of Drilling: NA Well Top of Casing : 09/08/2022 10.63 ft TOC/ Elev 466.31 ft amsl Er After Drilling: NA NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM �45' V — — — 5 f� :' 0.5ft Brown, TOPSOIL, No odor, Dry, Soft to Medium Stiff, (TOPSOIL) 473.9— — — — _ —465— — — — — — — 0 100 2-4-1-2 (5) 4-4-14-23 (18) 4 Grout ; • • •' • . •. ♦; ` Reddish Brown, Silty CLAY, No odor, Dry, Medium Stiff, Minor boulders at 5' bgs (FILL) 5.0 ft 469.4 — — — — —10— Dark Gray, Silty CLAY, and Clay, Organic odor, Moist to Wet, Soft to Medium Stiff, (ALLUVIAL SOIL) V Top of Casing 12.0 ft 462.4 Dark Gray, Silty CLAY, No odor, Dry, Medium Stiff, (RESIDUAL SOIL) 14.0ft aso.a —15— Mottled Blueish Gray and Orangish Brown, Silty CLAY, No odor, Dry, Hard, Remnant lamination (SAPROLITE) 2" ID Solid PVC Riser rr,,nfin, ior1 Mov4 Porrol Civil & Environmental Consultants, Inc. MONITORING WELL NUMBER PZ-18RD 2704 Cherokee Farm Way PAGE 2 OF 2 101 Knoxville, TN 37920 Park LLC PROJECT NAME Badin Business Park ``� `� _ \Suite CLIENT PROJECT `_\ _ _` Badin Business NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) WELL DIAGRAM MATERIAL DESCRIPTION —— \ Mottled Blueish Gray and Orangish Brown, Silty CLAY, No odor, Dry, Hard, Remnant lamination (SAPROLITE) — — 19.0 8 455.4 100 23-35-50/0. a� Blueish Gray, No odor, Dry to Wet, Minor oxide staining, 455 3 \�`y1�11 Metamudstone and meta-argillite parent (WEATHERED ROCK) -20-\ 111 , — — - _A\` 1 Bentonite \ 11t` — — Chips —� 1 100 6-17-50/0.4' -25-\ 11� Av, - - - J\\\{\ k1 100 8-15-50/0.5' \ llt` -445- -30� - \ \� — — - I Sand I — — -4 2" ID 0.01" - — - - 100 17-50/0.5' Slotted Screen PVC — \11t` --'i\k = 1` 35.0 5439.4 35 End of Monitoring Well at 35.0 feet -435- -40- -45- Civil & Environmental Consultants, Inc. BORING NUMBER B-300 \i `� `i` 2704 Cherokee Farm Way PAGE 1 OF 3 Suite 101 _ _ _` Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 06/13/2022 DATE COMPLETED 09/15/2022 CEC FIELD REPRESENTATIVE MWW REVIEWED BY MWW GROUND ELEVATION 560.16 ft amsl MONITORING EQUIPMENT NA LATITUDE 35.409677 LONGITUDE -80.120359 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER Stefan Smith DRILLING METHOD Sonic Drilling BACKFILL Temporary Well Installed then Abandoned BOREHOLE DIAMETER 6.00 in CORE SIZE NA WATER LEVELS U At Drilling: NA After Drilling: NA = End of Drilling: NA .: Temporary Well: 08/17/2022 27.02 ft bgs / Elev 533.14 ft amsl NOTES NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) JO; Q Q2« \Brown, TOPSOIL, Dry, Loose, (TOPSOIL) / 5F"4— — — — — — �5 — — — — _ — — — —541- — — Red to Yellowish Brown, Clayey SILT, with Gravel -sized Rock Fragments, Dry, Soft to Medium Stiff, (FILL) z 0 ft 558.2 — 5 — — — — — \ Dark Reddish Brown, Silty CLAY, Dry to Moist, Medium Stiff to Stiff, Minor sub -rounded coarse sand (RESIDUAL SOIL) 4.5 ft _ 555.7 1 \ ` \9.0 Mottled Blueish Gray, Silty CLAY, Dry, Medium Stiff to Stiff, Faintly saprolitic (RESIDUAL SOIL) ft 551.2 —10— — — — — \ \ \ \ \ _ — Reddish Brown, Silty CLAY, Dry, Medium Stiff to Stiff, Minor subangular pebbles, Trace gravel (RESIDUAL SOIL) 13.0ft 547.2— — — —15— — — \ \ \ \ Mottled Orangish Brown, Dry to Moist -, Very Stiff to Hard, SAPROLITE logged as silty CLAY, Minor subrounded sand and gravel increasing with depth (SAPROLITE) 18.0 ft 542.2 — — -20— \ \ \ _ Mottled Yellowish Brown and Reddish Brown, Dry, Very Stiff to Hard, SAPROLITE, Fine grained, Thinly laminated, Decreasing reddish brown color with depth, softer from 25-27', (SAPROLITE) frnnfini Ind Aiovf Pmnc\ Civil & Environmental Consultants, Inc. BORING NUMBER B-300 Cherokee101 Farm Way PAGE 2 OF 3 TN 37920 Park LLC PROJECT NAME Badin Business Park \tin`� _ CLIENT PROJECT `_\ 2704Suite _ _` Knoxville, Badin Business NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) — — -\ Mottled Yellowish Brown and Reddish Brown, Dry, Very Stiff to Hard, SAPROLITE, Fine grained, Thinly laminated, Decreasing reddish brown color with depth, softer from 25-27', (SAPROLITE) - - \ — \ — — \ — — —25— \ — — \ V — \ 29.05 531.2 _ _ Brown, Dry, Very Stiff to Hard, SAPROLITE, Increased silt and moisture content between 30' and 35', —531— —30— \ Oxide staining starting at 30' - transitions from planar surfaces to nodules with depth, Laminations absent - remnant fabric transitions to massive, 1 "-thick basal oxidation (SAPROLITE) — — \ — — \ — — — — \ \ —35— \ \ — — \ — — \ —521- -40 \ — — — — \ �43.0 ft 517.2 — — — \�'1\ `\ ``1 1 11� Mottled Light Gray and Brown, Very Stiff to Very Hard, SAPROLITE AND PARTIALLY WEATHERED ROCK TRANSITIONAL ZONE, Alternating layers of saprolite and partially weathered rock, Minor coarse sand- sized oxidized nodules in a silty clay -sized matrix (WEATHERED ROCK) — — — — —45-1 —\\Il\1 \ ��i1 — — — ` ',. — — — J� 1�� —511— -. 50.oft — 510.2 50 " �,\ Blueish Gray, Very Hard, PARTIALLY WEATHERED ROCK, Remnant foliation (WEATHERED ROCK) 7rnnfini Ind Movf Pmnc1 Civil & Environmental Consultants, Inc. BORING NUMBER B-300 OF 3 `\ CLIENT PROJECT `� `_\ 2704Suite Cherokee101 Farm Way PAGE 3 _ _ _ ` Knoxville, TN 37920 Badin Business Park LLC PROJECT NAME Badin Business Park NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) — 11` Blueish Gray, Very Hard, PARTIALLY WEATHERED ROCK, Remnant foliation (WEATHERED ROCK) -.52.0 ft 508.2 _ _ Blueish Gray, Very Hard, PARTIALLY WEATHERED ROCK TO FRACTURED ROCK, Meta-argillite parent, — _'a(` Trace pyrite mineralization on surface fractures (WEATHERED ROCK) — —‘k —55—\\\W — — Ili` ——\�\11i' -- \ 11i1' �o� —60—\ \1i� - - -—� -- -—A\ -- .1�1` ——.\\llh - - -65—� 1�1 - — _ k(\\\I - -AlA �9�-70— - - — —Ak\ ,\ \\\ 0'72.0 ft 488.2 _ _ End of Boring at 72.0 feet — - -75— — — —481- -80— Civil & Environmental Consultants, Inc. BORING NUMBER B-301 �`� `� `\ 2704Suite Cherokee101 Farm Way PAGE 1 OF 2 _ _ _` Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 06/21/2022 DATE COMPLETED 06/22/2022 CEC FIELD REPRESENTATIVE DC REVIEWED BY MWW GROUND ELEVATION 566.73 ft amsl MONITORING EQUIPMENT NA LATITUDE 35.410127 LONGITUDE -80.120874 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER Stefan Smith DRILLING METHOD 8-1/4-in Hollow Stem Auger + SPT BACKFILL Temporary Well Installed then Abandoned BOREHOLE DIAMETER 8.25 in CORE SIZE NA WATER LEVELS U At Drilling: 06/22/2022 28.00 ft bgs / Elev 538.73 ft amsl After Drilling: NA = End of Drilling: NA .: Temporary Well: 08/18/2022 24.50 ft bgs / Elev 542.23 ft amsl NOTES NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) Orange Brown, Clayey SILT, with Clay, and Silt, Moist, Topsoil at surface (RESIDUAL SOIL) 4.0 ft 562.E — — —557- 100 100 100 100 21-50/0.4' 50/0.2' 13-50/0.2' 50/0.2' _ 5 _ 11�1 Iv ` 11i\ rr `6.05 \(SAPROLITE) / Gray, PARTIALLY -WEATHERED ROCK, Dry (WEATHERED ROCK) 560.7— — _ _ —10— �1 1\ Gray, PARTIALLY -WEATHERED ROCK, Dry (WEATHERED ROCK) 11.0 ft 555.7— - —15— _ _ Tan Orange, Clayey SILT, Dry to Moist, Hard to Very Hard, Saprolitic (SAPROLITE) 19.0 5 547.7 _ —20�\� ` �� _ _ Light Gray to Dark Gray, Dry to Moist, PARTIALLY -WEATHERED ROCK, Metamudstone (WEATHERED ROCK) frnnfini!sari Alcor'. Pond Civil & Environmental Consultants, Inc. BORING NUMBER B-301 PAGE 2 OF 2 �`� _ `u _ `_` \ 2704Suite Cherokee101 Farm Way CLIENT PROJECT Knoxville, TN 37920 Badin Business Park LLC PROJECT NAME Badin Business Park NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) — Light Gray to Dark Gray, Dry to Moist, PARTIALLY -WEATHERED ROCK, Metamudstone — — l, (WEATHERED ROCK) — — — —‘k1(1 — — 0 50/0' -25-' \V . - _ ;Ili` --t Al'\\\11 -537- -30-\ 11t, — _' — — — JN\il\, — — \M35.0ft 531.E 35 End of Boring at 35.0 feet -527- -40- -45- - - -517- -50- Civil & Environmental Consultants, Inc. BORING NUMBER B-302 �`� `� `\ 2704 Cherokee Farm Way PAGE 1 OF 2 m Suite 101 _ _ _` Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 06/22/2022 DATE COMPLETED 06/22/2022 CEC FIELD REPRESENTATIVE DC REVIEWED BY MWW GROUND ELEVATION 563.49 ft amsl MONITORING EQUIPMENT NA LATITUDE 35.408729 LONGITUDE -80.120826 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER Stefan Smith DRILLING METHOD 8-1/4-in Hollow Stem Auger + SPT BACKFILL Temporary Well Installed then Abandoned BOREHOLE DIAMETER 8.25 in CORE SIZE NA WATER LEVELS U Er At Drilling: 06/22/2022 27.80 ft bgs / Elev 535.69 ft amsl After Drilling: 06/22/2022 27.10 ft bgs / Elev 536.39 ft amsl = End of Drilling: NA Temporary Well: 08/17/2022 30.30 ft bgs / Elev 533.19 ft amsl NOTES NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) Orange to Orangish Brown, Sandy SILT, Some Gravel, Topsoil at surface (RESIDUAL SOIL) 4.0 ft 559.5 — 100 75 100 100 4-4-5-8 (9) 7-8-8-10 (16) 25-41-50/0.4' 26-32-31-50/0 .3' — 5 — — —10— .5ft Reddish Brown, Sandy SILT, Dry, (RESIDUAL SOIL) 559.0 Reddish Brown, Clayey SILT, Dry, (RESIDUAL SOIL) 9.0 ft _ 554.5 Reddish Brown, Clayey SILT, Iron Oxide staining, Saprolitic, Rock fragments in top inch (SAPROLITE) 11.0ft 552.5 — — _ _ Orangish Brown, Clayey SILT, (RESIDUAL SOIL) 14.0 ft 549.5 I-15 14.5ft Orangish Brown, Clayey SILT, Saprolitic (SAPROLITE) 549.0 \, ; Y 15.0ft Gray, Dry, Iron Oxide staining, PARTIALLY -WEATHERED ROCK (WEATHERED ROCK) 548.5 — — 544— \\Orange, CLAY, Transition -Zone Material (RESIDUAL SOIL) 16.0 ft 547.5 Orangish Brown, Clayey SILT, Dry, (RESIDUAL SOIL) 19.0 0 544.5 _ _ _ 19.5ft Orangish Brown, Clayey SILT, Saprolitic (SAPROLITE) 544.0 1 V\20.ftft Gray, Dry, Iron Oxide staining, PARTIALLY -WEATHERED ROCK (WEATHERED ROCK) 543.5 —20 I Orangish Brown, Silty CLAY, Dry, Transition -Zone Material (RESIDUAL SOIL) 1rn.,finl!sari Nsavf D,nsa1 Civil & Environmental Consultants, Inc. BORING NUMBER B-302 Cherokee101 Farm Way PAGE 2 OF 2 TN 37920 Park LLC PROJECT NAME Badin Business Park `� _ `\ CLIENT PROJECT `_\ 2704Suite _ _`' Knoxville, Badin Business NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) 21.oft Oran_gish Brown, Silty CLAY, Dry Transition -Zone Material jRESIDUAL SOIL) 542.5 (63) — — — \ _ Orangish Brown, Silty CLAY, Increasing gray partially weathered rock fragments with depth (RESIDUAL SOIL) — 24.0 5 539.5 ��\ _ Grayish Brown to Gray, PARTIALLY -WEATHERED ROCK (WEATHERED ROCK) — — 100 19-50/0.4' —25—\\\1}\� \\\\` -- - -A: Al'1k(%f —534— 100 37-50/0.3' —30—\ \V y — — — JA\ ——\\\il\1 — — —35 \ \\� - --\Ilk\ I„.., -— 'Z 11 0.0 ft 523.5-524— 40 End of Boring at 40.0 feet — - -45— -514- -50— Civil & Environmental Consultants, Inc. BORING NUMBER B-303 �`� `� `\ 2704 Cherokee Farm Way PAGE 1 OF 2 m _ _ _` Suite 101 Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 06/23/2022 DATE COMPLETED 06/23/2022 CEC FIELD REPRESENTATIVE DC REVIEWED BY MWW GROUND ELEVATION 559.16 ft amsl MONITORING EQUIPMENT NA LATITUDE 35.408670 LONGITUDE -80.120971 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER Stefan Smith DRILLING METHOD 8-1/4-in Hollow Stem Auger + SPT BACKFILL Temporary Well Installed then Abandoned BOREHOLE DIAMETER 8.25 in CORE SIZE NA WATER LEVELS U Er At Drilling: 06/23/2022 32.00 ft bgs / Elev 527.16 ft amsl After Drilling: 06/24/2022 24.80 ft bgs / Elev 534.36 ft amsl = End of Drilling: NA Temporary Well: 08/17/2022 27.90 ft bgs / Elev 531.26 ft amsl NOTES NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) Orangish Brown, Clayey SILT, Moist, Topsoil at surface (RESIDUAL SOIL) 4.0 ft 555.2 — — — — — — — — — — —540— 100 100 100 100 100 75 100 100 9-12-15-18 (27) 7-10-11-15 (21) 7-10-14-20 (24) 5-11-17-21 (28) 10-12-24-31 (36) 9-22-30-35 (52) 8-37-50/0.2' 22-42-50 (92) — — 5 — — — _ _ Orangish Brown, Clayey SILT, Dry, Iron Oxide staining, Saprolitic (SAPROLITE) 9.0 ft 550.2 —10— 9.5ft Orange, Silty CLAY, Dry, Transition -Zone Material (RESIDUAL SOIL) 549.7-55°— Orangish Brown, Clayey SILT, Dry, Iron Oxide staining, Saprolitic (SAPROLITE) 11.8 ft 547.4 '120ft 5472- Silty CLAY, Dry, Transition Material SOIL) —15— — — —20— \Orange, -Zone (RESIDUAL / Orangish Brown, Clayey SILT, Dry, Saprolitic (SAPROLITE) 1 rnntim icd Alcor'. D,nc1 Civil & Environmental Consultants, Inc. BORING NUMBER B-303 �`� _ `� _ `_` \ 2704Suite Cherokee101 Farm Way PAGE 2 OF 2 Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) -25- - - — — Orangish Brown, Clayey SILT, Dry, Saprolitic (SAPROLITE) 7 533.3 - - — - - -530- — — - — — - - _ _ — - -510- 100 100 100 100 100 100 100 100 15-50/0.4' 24-50/0.4' 27-28-50 (78) 24-45-50 (95) 46-50/0.3' 44-50/0.2' 25-50/0.3' 50/0.3' -\ Orange, CLAY, Dry, Transition -Zone Material (RESIDUAL SOIL' J 533 Orangish Brown, Clayey SILT, Dry, Iron Oxide staining, Saprolitic (SAPROLITE) 28.5 ft 530.7 \ _ _ Reddish Brown, Silty CLAY, Dry, Transition -Zone Material (RESIDUAL SOIL) 30.05 529.2 -30 _ _ Orangish Brown, Clayey SILT, Dry, Iron Oxide staining, Saprolitic (SAPROLITE) 32.0 ft_ V 527.2 _ v 'I \�� _ _ _ D PARTIALLY -WEATHERED ROCK WEATHERED ROCK 526.8— 32.4 ft �/ ry, Gra , Orangish Brown, Clayey SILT, Wet, Saprolitic (SAPROLITE) 34.0 5 525.2 -35-\ - -I. _ _, - _\lk\ 40 `\\t -A, ,,,- `M&-520- T.),40.0 \' {\i f _ — Gray, Wet, PARTIALLY -WEATHERED ROCK (WEATHERED ROCK) ft 519.2 -45- - -50- _ _ End of Boring at 40.0 feet Civil & Environmental Consultants, Inc. BORING NUMBER B-304 `m `� `�', 2704 Cherokee Farm Way PAGE 1 OF 2 _ _ _ ` m Suite 101 Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 08/01/2022 DATE COMPLETED 08/01/2022 CEC FIELD REPRESENTATIVE DC REVIEWED BY MWW GROUND ELEVATION 546.78 ft amsl MONITORING EQUIPMENT NA LATITUDE 35.408132 LONGITUDE -80.121172 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER Zach Thompson DRILLING METHOD 8-1/4-in Hollow Stem Auger + SPT BACKFILL Temporary Well Installed then Abandoned BOREHOLE DIAMETER 8.25 in CORE SIZE NA WATER LEVELS At Drilling: 08/01/2022 25.50 ft bgs / Elev 521.28 ft amsl After Drilling: NA = End of Drilling: NA Temporary Well: 08/17/2022 23.60 ft bgs / Elev 523.18 ft amsl NOTES NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) .I 3 Orange, Silty SAND, with Cobbles, Dry, Topsoil at surface (RESIDUAL SOIL) 5.0 8541.8— — — — —537— —527- 100 50 100 100 100 100 100 100 27-29-50 (79) 50/0.4' 50 19-50 10-50 40-50/0.4' 45-50/0.3' 31-50 5 — — —10— —15- -20— Orangish Brown, Clayey SILT, Dry, Iron Oxide staining, Saprolitic (SAPROLITE) f(`nnfini Ind Movf Pono1 Civil & Environmental Consultants, Inc. BORING NUMBER B-304 2704Suite Cherokee101 Farm Way PAGE 2 OF 2 Knoxville, TN 37920 Park LLC PROJECT NAME Badin Business Park `� _ `u _ `_` \ CLIENT PROJECT Badin Business NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) Orangish Brown, Clayey SILT, Dry, Iron Oxide staining, Saprolitic (SAPROLITE) — — 75 32-35-50/0.2' V 80 50 25.O ft 521.8- - 25 N. N, \ 1�}� Gray, Dry, PARTIALLY WEATHERED ROCK (WEATHERED ROCK) — — 75 28-50/0.3' Ak - 100 50 —30—V `\ll\ l _ 111111 1hA �1� 100 44-50/0.3' \ 4,„ 1 — — --Zt. —35—\ 1� --\\�, Ai:_` \111` �• 0.0 ft 506.8-507— -- 40 End of Boring at 40.0 feet —45— —497— —50— Civil & Environmental Consultants, Inc. BORING NUMBER B-305 `m `� `�, 2704 Cherokee Farm Way PAGE 1 OF 2 _ _ _ ` m ' Suite 101 Knoxville, TN 37920 CLIENT Badin Business Park LLC PROJECT NAME Badin Business Park PROJECT NUMBER 300-226 PROJECT LOCATION Badin, NC DATE STARTED 06/23/2022 DATE COMPLETED 06/23/2022 CEC FIELD REPRESENTATIVE DC REVIEWED BY MWW GROUND ELEVATION 561.13 ft amsl MONITORING EQUIPMENT NA LATITUDE 35.408731 LONGITUDE -80.121533 DRILLING CONTRACTOR SAEDACCO, Inc. DRILLER Stefan Smith DRILLING METHOD 8-1/4-in Hollow Stem Auger + SPT BACKFILL Temporary Well Installed then Abandoned BOREHOLE DIAMETER 8.25 in CORE SIZE NA WATER LEVELS At Drilling: 06/23/2022 37.50 ft bgs / Elev 523.63 ft amsl After Drilling: 06/24/2022 24.80 ft bgs / Elev 536.33 ft amsl = End of Drilling: NA Temporary Well: 08/17/2022 29.70 ft bgs / Elev 531.43 ft amsl NOTES NA - Not Available; bgs - below ground surface; amsl - above mean sea level DEPTH (ft) GRAPHIC LOG MATERIAL DESCRIPTION ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) — 5 — — — —10— . 19.2 Reddish Brown, Sandy SILT, Dry, Topsoil at surface (RESIDUAL SOIL) ft 551.9-552— — — _ _ _ _ —542- — — 75 100 100 50 8-10-14-17 (24) 12-14-20-26 (34) 2-4-7-8 (11) 6-11-14-17 (25) Orangish Brown, Clayey SILT, Dry, Iron Oxide staining, Saprolitic (SAPROLITE) 14.0 ft 547.1 —15— — — -20— 14.5ft Reddish Brown, Sandy SILT, (RESIDUAL SOIL) 546.6 Reddish Brown to Orangish Brown, Clayey SILT, Moist, Iron Oxide staining, Saprolitic (SAPROLITE) Irnnfin1 Ind Movf Pono1 Civil & Environmental Consultants, Inc. BORING NUMBER B-305 PAGE 2 OF 2 Park �`� _ `u _ `_` \ 2704Suite Cherokee101 Farm Way CLIENT PROJECT Knoxville, TN 37920 Badin Business Park LLC PROJECT NAME Badin Business NUMBER 300-226 PROJECT LOCATION Badin, NC DEPTH (ft) GRAPHIC LOG m D r 0 m co n 7J —1 z ELEVATION (ft) Recovery % BLOW COUNTS (N VALUES) -25- Reddish Brown to Orangish Brown, Clayey SILT, Moist, Iron Oxide staining, Saprolitic (SAPROLITE) 7 �5.4 ft 535.7- — — - — — -532- _ _ — — — �22- - - — - -512- 90 100 100 100 12-25-50 (75) 11-25-33-50/0. 3' (58) 13-29-50/0.4' 17-27-50/0.3' `\��,2s.oft Gray, Moist -, PARTIALLY WEATHERED ROCK (WEATHERED ROCK) _ _ 535.1 530.3 — — — -30- Orangish Brown, Clayey SILT, Moist -, Iron Oxide staining, Saprolitic (SAPROLITE) V I 30.8 ft - a,.aft-----\Orang, CLAY, Moist-, Transition -Zone MaterialjRESIDUAL SOILL Orangish Brown to Orange, Clayey SILT, and Silty CLAY (RESIDUAL SOIL) 34.0 ft l €.301- 527.1 \\\347ft Orangish Brown, CLAY, Dry, Transition -Zone Material (RESIDUAL SOIL) szs.s— -35_. — —����� --��f --\�111 -40 \ �\�111v %(\ \\ Gray, Dry to Wet, Iron Oxide staining, PARTIALLY WEATHERED ROCK (WEATHERED ( ROCK) � - 1.0 ft 520.1 - -45- - - -50- End of Boring at 41.0 feet Hydrogeological Conceptual Site Model Update — Badin Business Park Attachment B 2022 Monitoring Well Survey and Construction Details EHS Support LLC Attachment B 2022 Monitoring Well Survey and Construction Details Hydrogeological Conceptual Site Model Update Alcoa Badin Works Badin, North Carolina Location North Carolina State Plane (NAD83) Date Installed Ground Elevation (NAV88 - ft) Top of Casing Elevation (NAV88- ft) Material Type and Size Depth of Well (ft) Bottom of Hole Elevation (ft) Screen Length (ft) Depth Elevation Top (ft) Bottom (ft) Top (NAVD88 - ft) Bottom (NAVD88 - ft) Northing Easting B-300 605912.22 1666180.38 -- 560.16 -- - -- -- B-301 606077.86 1666028.95 -- 566.73 -- -- -- -- -- -- -- -- -- B-302 605659.01 1666037.25 -- 563.49 -- -- -- -- -- -- -- -- -- B-303 605547.95 1665994.00 -- 559.16 -- -- -- -- -- -- -- -- -- B-305 605572.14 1665826.83 -- 561.13 -- -- -- -- -- -- -- -- -- MW200 607450.13 1667258.64 8/3/2022 530.35 533.11 2-inch diameter PVC 41.5 488.9 10 31.5 41.5 498.9 488.9 MW201 607025.48 1667544.53 8/4/2022 518.05 521.02 2-inch diameter PVC 41.0 477.1 10 31.0 41.0 487.1 477.1 MW202 606606.87 1667742.26 8/3/2022 515.92 515.63 2-inch diameter PVC 42.0 473.9 10 32.0 42.0 483.9 473.9 MW203 606114.16 1667729.12 8/2/2022 524.78 524.42 2-inch diameter PVC 42.0 482.8 10 32.0 42.0 492.8 482.8 MW204 605752.38 1667637.74 8/1/2022 520.98 520.67 2-inch diameter PVC 41.5 479.5 10 31.5 41.5 489.5 479.5 MW205 605403.63 1667456.53 8/4/2022 521.08 523.85 2-inch diameter PVC 31.0 490.1 10 21.0 31.0 500.1 490.1 MW206 604969.97 1667700.33 6/29/2022 512.25 511.87 2-inch diameter PVC 35.0 477.3 10 25.0 35.0 487.3 477.3 MW207 604561.78 1668227.00 6/27/2022 512.81 512.34 2-inch diameter PVC 15.0 497.8 5 10.0 15.0 502.8 497.8 MW208 604588.71 1667230.57 8/5/2022 516.29 518.76 2-inch diameter PVC 27.6 488.7 5 22.6 27.6 493.7 488.7 MW209 604937.32 1666835.66 8/4/2022 521.86 524.74 2-inch diameter PVC 52.0 469.9 10 42.0 52.0 479.9 469.9 MW210 604088.89 1666650.73 8/3/2022 521.78 524.76 2-inch diameter PVC 30.0 491.8 10 20.0 30.0 501.8 491.8 MW211 604113.58 1665700.61 8/2/2022 523.16 525.18 2-inch diameter PVC 30.0 493.2 5 25.0 30.0 498.2 493.2 MW212 MW213 603626.95 1665868.12 8/2/2022 517.83 520.31 2-inch diameter PVC 35.0 482.8 5 30.0 35.0 487.8 482.8 602992.07 1666448.96 8/4/2022 517.79 520.46 2-inch diameter PVC 78.5 439.3 20.0 58.5 78.5 459.3 439.3 MW214 602223.77 1667887.88 6/28/2022 495.71 495.35 2-inch diameter PVC 35.0 460.7 5 30.0 35.0 465.7 460.7 MW215 604050.81 1664883.72 8/8/2022 529.72 532.70 2-inch diameter PVC 40.0 489.7 5 35.0 40.0 494.7 489.7 MW216 603327.28 1665460.95 8/9/2022 516.30 518.84 2-inch diameter PVC 59.5 456.8 9.5 50.0 59.5 466.3 456.8 MW217 606754.38 1667085.60 8/4/2022 522.05 524.82 2-inch diameter PVC 25.0 497.1 5 20.0 25.0 502.1 497.1 MW218 606108.94 1666305.64 6/21/2022 560.88 563.52 2-inch diameter PVC 43.0 517.9 5 38.0 43.0 522.9 517.9 MW219 606275.65 1666375.59 6/19/2022 563.10 565.80 2-inch diameter PVC 40.0 523.1 5 35.0 40.0 528.1 523.1 MW220 605193.28 1666134.67 6/16/2022 522.06 524.59 2-inch diameter PVC 16.0 506.1 5 11.0 16.0 511.1 506.1 PZ-18RD 603200.77 1665127.62 8/8/2022 474.41 476.94 2-inch diameter PVC 35.0 439.4 5 30.0 35.0 444.4 439.4 Notes: -- = not relevant ft = feet NAD83 = North American Datum of 1983 NAVD88 = North American Vertical Datum of 1988 PVC = polyvinyl chloride EHS Support Page 1 of 1 Hydrogeological Conceptual Site Model Update — Badin Business Park Attachment C 2022 Soil Physical Properties Data EHS Support LLC INTEGRATED GEOSCIENCES LABORATORIES, LLC Environmental * Geotechnical * Core Analysis 6016 Centralcrest Street • Houston, Texas 77092 Telephone (713) 316-1800 • Fax (877) 255-9953 July 20, 2022 Michael Worden, Project Manager, Civil & Environnemental Consultants, Inc. 3701 Arco Corporate Dr Suite # 400, Charlotte, NC 28273. Re: IGS Labs File No: 2207-131 Project Name: Alcoa Worden Installation Project Number: 300-226-0017 Site Location: Badin, NC Subject: Final Report: Hydraulic Conductivity Package -(API RP40, ASTM D2216, EPA 9100), and Effective (Drainage) Porosity — (Mod. ASTM D425, API RP40). Dear Michael Worden, Please find enclosed report for Physical Properties analyses conducted upon soil samples received from your "Alcoa Worden Installation" project. All analyses were performed by applicable ASTM, EPA, or API methodologies. The sample is currently in storage and will be retained for thirty days past the completion of testing at no charge. Please note that the sample will be disposed of at that time. You may contact me regarding storage, disposal, or return of the sample. Integrated Geosciences Laboratories appreciate the opportunity to be of service. If you have any questions or require additional information, please contact me or Emeka Anazodo at (713) 316-1800. Sincerely, Integrated Geosciences Laboratories, LLC. Adebowale Ogunsola Integrated Geosciences Laboratories, LLC. Project Name: Alcoa Worden Installation IGS Labs File No: 2207-131 Project Number: 300-226-0017 Client: CEC, Inc. Site Location: Badin, NC Date Received: 7/15/2022 TEST PROGRAM - 20220715 Serial Number Sample ID Date; Time Sampled Depth (feet) Matix Type Hydraulic Conductivity Pkg API RP40, ASTM D2216, API 9100 RP40 Effective Porosity mod. ASTM D425 Comments Date Received: 20220715 1 MW-218 5-7 6/21/2022; 07:45 5-7 Soil X X 1- [2" X 30" shelby tube] 2 MW-218 15-17 6/21/2022; 08:15 15-17 Soil X X 1- [2" X 30" shelbytube]; 1 Gallon Ziplock TOTAL 2 2 2 Laboratory Test Program Notes days. 1. Standard TAT for basic analysis is 10-15 business Rev. 1.0 20140226 CLIENT CONFIDENTIAL Integrated Geosciences Laboratories, LLC PHYSICAL PROPERTIES DATA - DRAINAGE (EFFECTIVE) POROSITY IGS Labs File No: 2207-131 Project Name: Alcoa Worden Installation Client: CEC, Inc. Project No: 300-226-0017 Report Date: 7/20/2022 Site Location: Badin, NC API RP 40 / METHODS: ASTM D2216 API RP40 Mod. ASTM D425 Mod. ASTM D425 SAMPLE ID. IGS Labs ID DEPTH, ft. SAMPLE ORIENTATION (1) ANALYSIS DATE MOISTURE CONTENT, % weight DENSITY BULK, g/cc TOTAL POROSITY (2), %Vb EFFECTIVE POROSITY, %Vb MW-218 5-7 1 5-7 V 20220718 19.7 1.38 47.0 17.23 MW-218 15-17 2 15-17 R 20220718 29.1 1.30 46.8 16.57 Integrated Geosciences Laboratories, LLC PHYSICAL PROPERTIES DATA - HYDRAULIC CONDUCTIVITY PACKAGE IGS Labs File No: 2207-131 Project Name: Client: CEC, Inc. Project No: Report Date: 07/20/22 Site Location: API RP 40 / METHODS: ASTM D2216 API RP 40 API RP 40 API RP 40 Alcoa Worden Installation 300-226-0017 Badin, NC API RP 40; EPA 9100 25 PSI CONFINING STRESS SAMPLE ID. IGS Labs ID DEPTH, ft. SAMPLE ORIENTATION (1) MOISTURE CONTENT, % weight DENSITY POROSITY, %Vb (2) TOTAL PORE FLUID SATURATIONS (3), % Pv EFFECTIVE (4,5) PERMEABILITY TO WATER, millidarcy HYDRAULIC CONDUCTIVITY (4,5), cm/s DRY BULK, g/cc GRAIN, g/cc TOTAL AIR -FILLED MW-218 5-7 1 5-7 V 18.9 1.41 2.72 48.4 21.8 54.9 0.448 4.28E-07 MW-218 15-17 2 15-17 R 28.1 1.40 2.78 49.7 10.4 79.1 3.58 3.38E-06 (1) Sample Orientation: H = horizontal; V = vertical; R = remold (2) Total Porosity = all non & interconnected pore channels; Air Filled = pore channels not occupied by pore fluids. (3) Fluid density used to calculate pore fluid saturations: Water = 0.9996 g/cc. (4) Effective (Native) = With as -received pore fluids in place. (5) Permeability to water and hydraulic conductivity measured at saturated conditions. Vb = Bulk Volume, cc; Pv = Pore Volume, cc; ND = Not Detected Water = filtered Laboratory Fresh (tap) or Site water. INTEGRATED GEOSCIENCES LABORATORIES, LLC CHAIN OF CUSTODY (formerly PTS Laboratories, Inc.) COMPANY: ADDRESS: PROJECT MANAGER NAME: 11\i.• Ncrac., PROJECT NAME: A1 ctr, Vc11 1 ,514 )1e, \ CITY ZIP CODE �:.„ (\-,c.rvt4c1 N ( 2ei')5 EMAIL PHONE # it. � 1)(1 16I y t t�lWOr�C,� cc(cUr''• PROJECT NUMBER: GG—Z2c GCS SITE LOCATION: AMPLER SIGNATURE: F- L� SAMPLE ID ti1W��,11 ) DATE (,)21/11 TIME C?LI`, DEPTH, FEET I`;-1) NUMBER OF SAMPLES SOIL PROPERTIES PACKAGE 0 u G 0 0 1 0 0 z 0 u 0 1 ANALYSIS REQUEST PAGE OF PORE FLUID SATURATION PACKAGE TCEQ/TNRCC PROPERTIES PACKAGE CAPILLARITY PACKAGE FLUID PROPERTIES PACKAGE CORE PHOTOGRAPHY VAPOR TRANSPORT PACKAGE POROSITY: TOTAL, AIR -FILLED, WATER -FILLED PROSITY: EFFECTIVE, ASTM 0425M BULK DENSITY (DRY), API RP40 or ASTM D2937 AIR PERMEABILITY, API RP40 0 0 Q 8 u z 0 u 0 1 0 0 a, 0 o` 0 0 m ZE- 0 z OC: WALK LEY -BLACK ATTERBERG LIMITS, ASTM D4318 APOR INTRUSION PACKAGE FREE PRODUCT MOBILITY PACKAGE RESIDUAL SATURATION BY WATER DRIVE IPO #: BILLING ADDRESS: BILLING EMAIL: r"'1Jclj1,„ BILLING CONTACT: 1hiki Wcr i,. BILLING PHONE #: -Zlh - 7hy L TURNAROUND TIME 24 HOURS 72 HOURS OTHERS: 'NORMAL 5 DAYS SAMPLE INTEGRITY (CHECK): INTACT: TEMP (F) IGL QUOTE NO/DATE IGL FILE NO ?v7 — COMMENTS tYySe I Ir,c^ ICI 11)' 1 1r RELINQUISHED) Il BY +-JGr,MI� c Ili COMPANY (r=L DATE �i�11112 i TIME 2: RECEIVED BY: COMPANY 16,5 La 7%j sDATE 2- 2' 1. RELINQUISHED BY COMPANY TIME L>t) INTEGRATED GEOSCIENCIES LABORATORIES, LLC * 6016 CENTRALCREST STREET, HOUSTON, TEXAS 77092 * PHONE (713) 3161800 * WEBSITE www.igslaboratories.com 2: RECEIVED BY COMPANY DATE TIME DATE TIME INTEGRATED GEOSCIENCES LABORATORIES, LLC Environmental * Geotechnical * Core Analysis 6016 Centralcrest Street • Houston, Texas 77092 Telephone (713) 316-1800 • Fax (877) 255-9953 August 31, 2022 Michael Worden, Project Manager, Civil & Environnemental Consultants, Inc. 3701 Arco Corporate Dr Suite # 400, Charlotte, NC 28273. Re: IGS Labs File No: 2208-155 Project Name: Alcoa Well Installation Project Number: 300-226-0017 Site Location: Badin, NC Subject: Final Report: Hydraulic Conductivity Package -(API RP40, ASTM D2216, EPA 9100), and Effective (Drainage) Porosity — (Mod. ASTM D425, API RP40). Dear Michael Worden, Please find enclosed report for Physical Properties analyses conducted upon soil samples received from your "Alcoa Well Installation" project. All analyses were performed by applicable ASTM, EPA, or API methodologies. The sample is currently in storage and will be retained for thirty days past the completion of testing at no charge. Please note that the sample will be disposed of at that time. You may contact me regarding storage, disposal, or return of the sample. Integrated Geosciences Laboratories appreciate the opportunity to be of service. If you have any questions or require additional information, please contact me or Emeka Anazodo at (713) 316-1800. Sincerely, Integrated Geosciences Laboratories, LLC. Adebowale Ogunsola Integrated Geosciences Laboratories, LLC. Project Name: Alcoa Well Installation IGS Labs File No: 2208-155 Project Number: 300-226-0017 Client: CEC, Inc. Site Location: Badin, NC Date Received: 8/25/2022 TEST PROGRAM - 20220825 Serial Number Sample ID Date; Time Sampled Depth (feet) Matix Type Hydraulic Conductivity Pkg API RP40, ASTM D2216, API 9100 RP40 Effective Porosity mod. ASTM D425 Comments Date Received: 20220825 1 MW-211 8/3/2022; 0740 9-13 Soil X X 1 [2" X 30" shelby tube]; 1 Gallon Ziplock 2 MW-203 8/2/2022; 0800 5-7 Soil X X 1- [2" X 30" shelby tube] 3 MW-204 8/1/2022; 0915 5-9 Soil X X 1 [2" X 30" shelby tube]; 1 Gallon Ziplock 4 MW-212 8/2/2022; 0750 7-9 Soil X X 1- [2" X 30" shelby tube]; 5 MW-201 8/4/2022; 1315 5-7 Soil X X 1 [2" X 30" shelby tube]; 1 Gallon Ziplock 6 MW-208 8/5/2022; 1200 7-9 Soil X X 1- [2" X 30" shelby tube] 7 MW-201 8/4/2022; 1325 8-9 Soil X X 1- [2" X 30" shelby tube] TOTAL 7 7 7 Laboratory Test Program Notes 1. Standard TAT for basic analysis is 10-15 business days. Rev. 1.0 20140226 CLIENT CONFIDENTIAL Integrated Geosciences Laboratories, LLC PHYSICAL PROPERTIES DATA - HYDRAULIC CONDUCTIVITY PACKAGE IGS Labs File No: 2208-155 Project Name: Client: CEC Project No: Report Date: 08/31/22 Site Location: API RP 40 / METHODS: ASTM D2216 API RP 40 API RP 40 API RP 40 Alcoa Well Installation 300-226-0017 Badin, NC API RP 40; EPA 9100 25 PSI CONFINING STRESS SAMPLE ID. IGS Labs ID DEPTH, ft. SAMPLE ORIENTATION (1) MOISTURE CONTENT, % weight DENSITY POROSITY, %Vb (2) TOTAL PORE FLUID SATURATIONS (3), % Pv EFFECTIVE (4,5) PERMEABILITY TO WATER, millidarcy HYDRAULIC CONDUCTIVITY (4,5), cm/s DRY BULK, g/cc GRAIN, g/cc TOTAL AIR -FILLED MW-211 1 9-13 R 17.8 1.43 2.74 47.9 22.4 53.2 0.332 3.18E-07 MW-203 2 5-7 V 28.7 1.40 2.77 49.5 9.5 80.9 0.211 2.02E-07 MW-204 3 5-9 R 17.9 1.43 2.77 48.4 22.8 52.9 1.55 1.49E-06 MW-212 4 7-9 V 26.3 1.48 2.76 46.6 7.8 83.3 0.531 5.04E-07 MW-201 5 5-7 V 20.0 1.36 2.77 50.9 23.6 53.6 1.60 1.55E-06 MW-208 6 7-9 V 20.4 1.31 2.77 52.6 25.9 50.8 0.245 2.36E-07 MW-201 7 8-9 V 17.3 1.42 2.75 48.4 23.8 50.8 0.164 1.58E-07 (1) Sample Orientation: H = horizontal; V = vertical; R = remold (2) Total Porosity = all non & interconnected pore channels; Air Filled = pore channels not occupied by pore fluids. (3) Fluid density used to calculate pore fluid saturations: Water = 0.9996 g/cc. (4) Effective (Native) = With as -received pore fluids in place. (5) Permeability to water and hydraulic conductivity measured at saturated conditions. Vb = Bulk Volume, cc; Pv = Pore Volume, cc; ND = Not Detected Water = filtered Laboratory Fresh (tap) or Site water. Integrated Geosciences Laboratories, LLC PHYSICAL PROPERTIES DATA - DRAINAGE (EFFECTIVE) POROSITY IGS Labs File No: 2208-155 Project Name: Alcoa Well Installation Client: CEC, Inc. Project No: 300-226-0017 Report Date: 8/29/2022 Site Location: Badin, NC API RP 40 / METHODS: ASTM D2216 API RP40 Mod. ASTM D425 Mod. ASTM D425 SAMPLE ID. IGS Labs ID DEPTH, ft. SAMPLE ORIENTATION (1) ANALYSIS DATE MOISTURE CONTENT, % weight DENSITY BULK, g/cc TOTAL POROSITY (2), %Vb EFFECTIVE POROSITY, %Vb MW-211 1 9-11 R 20220826 17.9 1.45 48.0 18.61 MW-203 2 5-7 V 20220826 29.1 1.42 46.6 11.57 MW-204 3 7-9 R 20220826 17.4 1.41 52.0 22.21 MW-212 4 7-9 V 20220826 26.4 1.45 49.0 14.56 MW-201 5 5-7 V 20220826 20.2 1.36 50.7 20.93 MW-208 6 7-9 V 20220826 20.2 1.31 52.8 20.62 MW-201 7 8-9 V 20220826 17.5 1.41 48.0 17.11 INTEGRATED GEOSCIENCES LABORATORIES, LLC CHAIN OF CUSTODY PAGE j OF (formerly PTS Laboratories, Inc.) ANALYSIS REQUEST IPO #: COMPANY: - _ r '— ` NUMBER OF SAMPLES SOIL PROPERTIES PACKAGE HYDRAULIC CONDUCTIVITY/HYDRAULIC CONDUCTIVITY PACKA( PORE FLUID SATURATION PACKAGE TCEO/TNRCC PROPERTIES PACKAGE CAPILLARITY PACKAGE FLUID PROPERTIES PACKAGE CORE PHOTOGRAPHY VAPOR TRANSPORT PACKAGE POROSITY: TOTAL, AIR -FILLED, WATER -FILLED PROSITY: EFFECTIVE, ASTM D425M SPECIFIC GRAVITY, ASTM D854 BULK DENSITY (DRY), API RP40 or ASTM D2937 AIR PERMEABILITY, API RP40 HYDRAULIC CONDUCTIVITY, EPA 9100/API RP40 OR ASTM D5084 GRAIN SIZE DISTRIBUTION, ASTM D422 or D6913 or D44641 TOC: WALKLEY-BLACK ATTERBERG LIMITS, ASTM D4318 VAPOR INTRUSION PACKAGE FREE PRODUCT MOBILITY PACKAGE RESIDUAL SATURATION BY WATER DRIVE BILLING ADDRESS: ADDRESS: CITY ZIP CODE /!v I At:C ccreef'+4 ` 4 „.. ( }.0 IC t(� w ‘‘.. (4LU BILLING EMAIL: k BILLING CONTACT: /h,ti, e.1L.,, PROJECT MANAGER NAME: EMAIL PHONE # \� n1, )-Zl`1�24111 KC :JC.1"1 !s'0.)�r�fwiCUCC.CCPs, BILLING PHONE #A(, j -Zl°k - 1., Lk 1 TURNAROUND TIME 24 HOURS 5 DAYS PROJECT NAME: /� (� \\ N(C, - (\Sl! , -, C) F t l�� . 72 HOURS NORMAL OTHERS: PROJECT NUMBER: >/`ll11 JUV `�-1` CG\.7 SAMPLE INTEGRITY (CHECK): INTACT: TEMP (F) SITE LOCATION: N \•SC i r) i N L IGL QUOTE NO/DATE SAMPLER SIGNATURE: ` A� I� IGL FILE NO _ SAMPLE ID DATE TIME DEPTH, FEET COMMENTS 1‘)\•.)- 1) 1 IhT/1 0)L10 CI - t l \ X ic.(1do c. )1 -„' IN\ --IC $rl/Li coo tit) X X J r,v-1011 inns O ')-(i x X • 1( i) �`' 5--)I L --- o i_ _.- _ MU-11ti i'hill C»C 7-- `t x X Mu- ).c) 1 ` iwil t> s-7 X X 1e-,11 ,,!(,) 17,(i C -) My-1C` %iti)11 i-It i) '>._('1 X X Mu- -ICI i/11/11_ iA�� \, ci X 1. RELINQUISHED BY OC- \1\, ((AI) bkn� 2: RECEIVED BY: 1 1. RELINQUISHED BY 2: RECEIVED BY COMPANY (i�� COMPANY /6' L��5, LL (- COMPANY COMPANY DATE p TIME l�1��L1 ,C 'j DATE TIME �r�s�7L /�CC) DATE TIME DATE TIME INTEGRATED GEOSCIENCIES LABORATORIES, LLC * 6016 CENTRALCREST STREET, HOUSTON, TEXAS 77092 * PHONE (713) 316 1800 * WEBSITE www.igslaboratories.com Hydrogeological Conceptual Site Model Update — Badin Business Park Attachment D 2022 Aquifer Testing Calculations EHS Support LLC AQTESOLV for Windows Data Set: P:\300-000\300-226\-Draft Documents\Task 0017-CSM Refinement\Aquifer Testing\Aqtesolv files\New p� Date: 11/21/22 Time: 12:52:48 PROJECT INFORMATION Company: CEC Client: ALCOA Project: 300-226 Location: Badin, North Carolina Test Date: 9/29/22 Test Well: MW-201 AQUIFER DATA Saturated Thickness: 13. ft Anisotropy Ratio (Kz/Kr): 0.06529 PUMPING WELL DATA No. of pumping wells: 1 Pumping Well No. 1: MW-201 X Location: 0. ft Y Location: 0. ft Casing Radius: 0.083 ft Well Radius: 0.349 ft Partially Penetrating Well Depth to Top of Screen: 3. ft Depth to Bottom of Screen: 13. ft No. of pumping periods: 4 Pum. ing Period Data Time (sec) Rate Finn Time (sec) Rate (L/min) U. 22' 5. 5.1 420. 2.4 3665. 0. OBSERVATION WELL DATA No. of observation wells: 1 Observation Well No. 1: MW-201 X Location: 0. ft Y Location: 0. ft Radial distance from MW-201: 0. ft Partially Penetrating Well Depth to Top of Screen: 3. ft Depth to Bottom of Screen: 13. ft No. of Observations: 946 Observation Data Time (sec) Displacement (ft) I ime (sec) Displacement (ft) 5. 0. 23 /U. 17.31 10. 0.08421 2375. 17.37 15. 0.3819 2380. 17.45 20. 0.5901 2385. 17.52 25. 0.7412 2390. 17.59 30. 0.8441 2395. 17.64 35. 0.8959 2400. 17.7 11/21/22 1 12:52:48 AQTESOLV for Windows Time sec) Displacement (ft) Time sec) Displacement (ft) 4 0.908 / 24U5. 1 /. /8 45. 0.9725 2410. 17.84 50. 0.9732 2415. 17.91 55. 1.001 2420. 17.95 60. 1.011 2425. 18.03 65. 1.011 2430. 18.09 70. 1.024 2435. 18.14 75. 1.025 2440. 18.18 80. 1.044 2445. 18.24 85. 1.051 2450. 18.28 90. 1.058 2455. 18.34 95. 1.099 2460. 18.4 100. 1.148 2465. 18.43 105. 1.167 2470. 18.48 110. 1.189 2475. 18.53 115. 1.198 2480. 18.56 120. 1.208 2485. 18.61 125. 1.208 2490. 18.65 130. 1.209 2495. 18.7 135. 1.209 2500. 18.76 140. 1.18 2505. 18.8 145. 1.222 2510. 18.84 150. 1.211 2515. 18.88 155. 1.212 2520. 18.92 160. 1.203 2525. 18.96 165. 1.204 2530. 19.01 170. 1.183 2535. 19.05 175. 1.156 2540. 19.1 180. 1.114 2545. 19.11 185. 1.081 2550. 19.15 190. 1.03 2555. 19.2 195. 0.9665 2560. 19.24 200. 0.9177 2565. 19.28 205. 0.8478 2570. 19.32 210. 0.8111 2575. 19.35 215. 0.7743 2580. 19.4 220. 0.8638 2585. 19.44 225. 0.9744 2590. 19.46 230. 1.05 2595. 19.5 235. 1.107 2600. 19.52 240. 1.149 2605. 19.56 245. 1.188 2610. 19.6 250. 1.227 2615. 19.63 255. 1.257 2620. 19.66 260. 1.284 2625. 19.7 265. 1.302 2630. 19.73 270. 1.344 2635. 19.76 275. 1.365 2640. 19.77 280. 1.383 2645. 19.82 285. 1.314 2650. 19.85 290. 1.245 2655. 19.88 295. 1.272 2660. 19.9 300. 1.293 2665. 19.93 305. 1.353 2670. 19.96 310. 1.468 2675. 19.97 315. 1.519 2680. 19.99 320. 1.578 2685. 20.02 325. 1.572 2690. 20.04 330. 1.557 2695. 20.06 335. 1.55 2700. 20.09 340. 1.535 2705. 20.12 345. 1.525 2710. 20.15 350. 1.517 2715. 20.17 355. 1.514 2720. 20.2 360. 1.524 2725. 20.21 365. 1.503 2730. 20.23 11 /21 /22 2 12:52:48 AQTESOLV for Windows Time sec) Displacement (ft) Time sec) Displacement (ft) f/ 1.491 2 /35. 20.24 375. 1.471 2740. 20.27 380. 1.45 2745. 20.28 385. 1.42 2750. 20.3 390. 1.387 2755. 20.32 395. 1.348 2760. 20.35 400. 1.331 2765. 20.36 405. 1.286 2770. 20.39 410. 1.246 2775. 20.4 415. 1.212 2780. 20.42 420. 1.157 2785. 20.44 425. 1.121 2790. 20.44 430. 1.09 2795. 20.46 435. 1.053 2800. 20.47 440. 1.303 2805. 20.48 445. 1.597 2810. 20.51 450. 1.895 2815. 20.51 455. 2.181 2820. 20.51 460. 2.452 2825. 20.52 465. 2.704 2830. 20.53 470. 2.939 2835. 20.55 475. 3.164 2840. 20.55 480. 3.401 2845. 20.55 485. 3.629 2850. 20.57 490. 3.861 2855. 20.55 495. 4.059 2860. 20.55 500. 4.246 2865. 20.56 505. 4.436 2870. 20.56 510. 4.599 2875. 20.56 515. 4.768 2880. 20.55 520. 4.935 2885. 20.56 525. 5.098 2890. 20.55 530. 5.221 2895. 20.55 535. 5.355 2900. 20.55 540. 5.496 2905. 20.54 545. 5.61 2910. 20.55 550. 5.733 2915. 20.55 555. 5.865 2920. 20.56 560. 5.961 2925. 20.56 565. 6.074 2930. 20.56 570. 6.164 2935. 20.56 575. 6.247 2940. 20.56 580. 6.337 2945. 20.56 585. 6.399 2950. 20.56 590. 6.48 2955. 20.56 595. 6.532 2960. 20.57 600. 6.613 2965. 20.56 605. 6.673 2970. 20.55 610. 6.742 2975. 20.56 615. 6.805 2980. 20.55 620. 6.857 2985. 20.56 625. 6.909 2990. 20.55 630. 6.97 2995. 20.55 635. 7.022 3000. 20.55 640. 7.043 3005. 20.55 645. 7.116 3010. 20.55 650. 7.167 3015. 20.56 655. 7.208 3020. 20.57 660. 7.246 3025. 20.58 665. 7.267 3030. 20.57 670. 7.296 3035. 20.57 675. 7.317 3040. 20.57 680. 7.35 3045. 20.58 685. 7.368 3050. 20.56 690. 7.401 3055. 20.56 695. 7.431 3060. 20.57 11 /21 /22 3 12:52:48 AQTESOLV for Windows Time sec) Displacement (ft) Time (sec) Displacement (ft) 7U 7.449 3Ub5. 20.58 705. 7.491 3070. 20.58 710. 7.509 3075. 20.58 715. 7.543 3080. 20.58 720. 7.54 3085. 20.59 725. 7.571 3090. 20.6 730. 7.604 3095. 20.59 735. 7.623 3100. 20.6 740. 7.664 3105. 20.62 745. 7.673 3110. 20.62 750. 7.706 3115. 20.62 755. 7.744 3120. 20.62 760. 7.765 3125. 20.64 765. 7.807 3130. 20.65 770. 7.828 3135. 20.65 775. 7.847 3140. 20.65 780. 7.89 3145. 20.67 785. 7.921 3150. 20.67 790. 7.942 3155. 20.7 795. 7.952 3160. 20.7 800. 7.985 3165. 20.72 805. 8.024 3170. 20.73 810. 8.076 3175. 20.74 815. 8.118 3180. 20.74 820. 8.16 3185. 20.75 825. 8.199 3190. 20.76 830. 8.219 3195. 20.76 835. 8.249 3200. 20.76 840. 8.278 3205. 20.77 845. 8.298 3210. 20.79 850. 8.328 3215. 20.78 855. 8.369 3220. 20.79 860. 8.399 3225. 20.8 865. 8.429 3230. 20.79 870. 8.441 3235. 20.82 875. 8.462 3240. 20.82 880. 8.48 3245. 20.82 885. 8.514 3250. 20.84 890. 8.553 3255. 20.84 895. 8.595 3260. 20.85 900. 8.616 3265. 20.87 905. 8.646 3270. 20.87 910. 8.688 3275. 20.88 915. 8.706 3280. 20.88 920. 8.766 3285. 20.89 925. 8.789 3290. 20.89 930. 8.828 3295. 20.9 935. 8.87 3300. 20.91 940. 8.911 3305. 20.91 945. 8.95 3310. 20.92 950. 8.977 3315. 20.92 955. 8.992 3320. 20.93 960. 9.04 3325. 20.91 965. 9.064 3330. 20.92 970. 9.104 3335. 20.93 975. 9.164 3340. 20.92 980. 9.197 3345. 20.93 985. 9.254 3350. 20.94 990. 9.287 3355. 20.95 995. 9.341 3360. 20.95 1000. 9.398 3365. 20.95 1005. 9.422 3370. 20.95 1010. 9.462 3375. 20.96 1015. 9.524 3380. 20.96 1020. 9.534 3385. 20.96 1025. 9.559 3390. 20.95 11 /21 /22 4 12:52:48 AQTESOLV for Windows Time sec) Displacement (ft) Time sec) Displacement (ft) 1 U3U. 9.55 / 3395. 20.95 1035. 9.603 3400. 20.95 1040. 9.642 3405. 20.95 1045. 9.66 3410. 20.96 1050. 9.681 3415. 20.94 1055. 9.701 3420. 20.94 1060. 9.743 3425. 20.94 1065. 9.773 3430. 20.94 1070. 9.811 3435. 20.92 1075. 9.832 3440. 20.92 1080. 9.861 3445. 20.92 1085. 9.881 3450. 20.92 1090. 9.913 3455. 20.92 1095. 9.931 3460. 20.92 1100. 9.973 3465. 20.91 1105. 10. 3470. 20.91 1110. 10.05 3475. 20.9 1115. 10.08 3480. 20.9 1120. 10.1 3485. 20.9 1125. 10.12 3490. 20.9 1130. 10.14 3495. 20.9 1135. 10.17 3500. 20.91 1140. 10.19 3505. 20.9 1145. 10.22 3510. 20.9 1150. 10.24 3515. 20.89 1155. 10.26 3520. 20.9 1160. 10.29 3525. 20.89 1165. 10.32 3530. 20.88 1170. 10.36 3535. 20.88 1175. 10.37 3540. 20.9 1180. 10.39 3545. 20.9 1185. 10.42 3550. 20.9 1190. 10.45 3555. 20.9 1195. 10.47 3560. 20.9 1200. 10.52 3565. 20.92 1205. 10.55 3570. 20.91 1210. 10.57 3575. 20.91 1215. 10.6 3580. 20.9 1220. 10.64 3585. 20.91 1225. 10.66 3590. 20.91 1230. 10.67 3595. 20.92 1235. 10.69 3600. 20.92 1240. 10.71 3605. 20.92 1245. 10.74 3610. 20.92 1250. 10.75 3615. 20.93 1255. 10.77 3620. 20.93 1260. 10.78 3625. 20.92 1265. 10.79 3630. 20.93 1270. 10.81 3635. 20.92 1275. 10.83 3640. 20.92 1280. 10.85 3645. 20.92 1285. 10.88 3650. 20.9 1290. 10.9 3655. 20.92 1295. 10.94 3660. 20.92 1300. 10.96 3665. 20.91 1305. 10.99 3670. 20.92 1310. 11.02 3675. 20.43 1315. 11.07 3680. 19.85 1320. 11.12 3685. 19.32 1325. 11.18 3690. 18.81 1330. 11.24 3695. 18.33 1335. 11.31 3700. 17.85 1340. 11.37 3705. 17.4 1345. 11.42 3710. 16.95 1350. 11.47 3715. 16.53 1355. 11.5 3720. 16.11 11 /21 /22 5 12:52:49 AQTESOLV for Windows Time (sec) Displacement (ft) Time sec) Displacement (ft) 1 36U. 11.52 3 /25. 15. /3 1365. 11.58 3730. 15.33 1370. 11.62 3735. 14.98 1375. 11.66 3740. 14.61 1380. 11.68 3745. 14.28 1385. 11.69 3750. 13.94 1390. 11.71 3755. 13.63 1395. 11.71 3760. 13.32 1400. 11.73 3765. 13.01 1405. 11.73 3770. 12.73 1410. 11.73 3775. 12.45 1415. 11.74 3780. 12.18 1420. 11.78 3785. 11.92 1425. 11.79 3790. 11.67 1430. 11.8 3795. 11.43 1435. 11.81 3800. 11.19 1440. 11.82 3805. 10.95 1445. 11.83 3810. 10.73 1450. 11.86 3815. 10.52 1455. 11.87 3820. 10.32 1460. 11.88 3825. 10.12 1465. 11.89 3830. 9.92 1470. 11.9 3835. 9.737 1475. 11.92 3840. 9.551 1480. 11.94 3845. 9.38 1485. 11.97 3850. 9.215 1490. 11.98 3855. 9.041 1495. 11.99 3860. 8.897 1500. 12.01 3865. 8.735 1505. 12.03 3870. 8.592 1510. 12.03 3875. 8.448 1515. 12.05 3880. 8.316 1520. 12.07 3885. 8.185 1525. 12.07 3890. 8.052 1530. 12.09 3895. 7.928 1535. 12.1 3900. 7.805 1540. 12.12 3905. 7.681 1545. 12.12 3910. 7.579 1550. 12.14 3915. 7.464 1555. 12.14 3920. 7.359 1560. 12.17 3925. 7.259 1565. 12.17 3930. 7.156 1570. 12.19 3935. 7.066 1575. 12.2 3940. 6.972 1580. 12.21 3945. 6.869 1585. 12.23 3950. 6.797 1590. 12.23 3955. 6.705 1595. 12.24 3960. 6.624 1600. 12.25 3965. 6.552 1605. 12.26 3970. 6.471 1610. 12.28 3975. 6.4 1615. 12.28 3980. 6.328 1620. 12.28 3985. 6.257 1625. 12.32 3990. 6.185 1630. 12.33 3995. 6.126 1635. 12.34 4000. 6.066 1640. 12.36 4005. 5.983 1645. 12.37 4010. 5.931 1650. 12.38 4015. 5.88 1655. 12.39 4020. 5.819 1660. 12.4 4025. 5.767 1665. 12.41 4030. 5.704 1670. 12.43 4035. 5.652 1675. 12.44 4040. 5.602 1680. 12.45 4045. 5.557 1685. 12.46 4050. 5.5 11 /21 /22 6 12:52:49 AQTESOLV for Windows Time sec) Displacement (ft) Time sec) Displacement (ft) 169U. 12.47 4U55. 5.449 1695. 12.48 4060. 5.411 1700. 12.49 4065. 5.354 1705. 12.5 4070. 5.318 1710. 12.51 4075. 5.276 1715. 12.53 4080. 5.225 1720. 12.55 4085. 5.186 1725. 12.56 4090. 5.15 1730. 12.58 4095. 5.113 1735. 12.58 4100. 5.071 1740. 12.61 4105. 5.026 1745. 12.62 4110. 4.99 1750. 12.63 4115. 4.948 1755. 12.65 4120. 4.918 1760. 12.66 4125. 4.888 1765. 12.66 4130. 4.845 1770. 12.66 4135. 4.805 1775. 12.68 4140. 4.77 1780. 12.7 4145. 4.739 1785. 12.71 4150. 4.708 1790. 12.73 4155. 4.677 1795. 12.73 4160. 4.657 1800. 12.76 4165. 4.628 1805. 12.77 4170. 4.608 1810. 12.8 4175. 4.552 1815. 12.82 4180. 4.538 1820. 12.84 4185. 4.509 1825. 12.85 4190. 4.479 1830. 12.86 4195. 4.458 1835. 12.87 4200. 4.437 1840. 12.89 4205. 4.407 1845. 12.89 4210. 4.371 1850. 12.91 4215. 4.356 1855. 12.92 4220. 4.323 1860. 12.93 4225. 4.299 1865. 12.94 4230. 4.273 1870. 12.93 4235. 4.255 1875. 12.96 4240. 4.222 1880. 12.97 4245. 4.205 1885. 12.97 4250. 4.183 1890. 12.99 4255. 4.156 1895. 13. 4260. 4.14 1900. 13. 4265. 4.11 1905. 13.01 4270. 4.088 1910. 13.01 4275. 4.067 1915. 13.01 4280. 4.037 1920. 13.03 4285. 4.017 1925. 13.01 4290. 3.996 1930. 13.01 4295. 3.972 1935. 13.03 4300. 3.967 1940. 13.05 4305. 3.94 1945. 13.05 4310. 3.927 1950. 13.05 4315. 3.905 1955. 13.04 4320. 3.871 1960. 13.05 4325. 3.862 1965. 13.07 4330. 3.852 1970. 13.07 4335. 3.815 1975. 13.08 4340. 3.752 1980. 13.08 4345. 3.71 1985. 13.1 4350. 3.852 1990. 13.11 4355. 3.847 1995. 13.1 4360. 3.904 2000. 13.12 4365. 3.853 2005. 13.11 4370. 3.817 2010. 13.12 4375. 3.796 2015. 13.11 4380. 3.754 11 /21 /22 7 12:52:49 AQTESOLV for Windows Time sec) Displacement (ft) Time sec) Displacement (ft) 2U2U. 13.11 43 5. 3. /39 2025. 13.11 4390. 3.724 2030. 13.13 4395. 3.7 2035. 13.13 4400. 3.673 2040. 13.13 4405. 3.652 2045. 13.14 4410. 3.631 2050. 13.15 4415. 3.61 2055. 13.16 4420. 3.595 2060. 13.16 4425. 3.592 2065. 13.16 4430. 3.549 2070. 13.18 4435. 3.543 2075. 13.2 4440. 3.524 2080. 13.21 4445. 3.506 2085. 13.21 4450. 3.496 2090. 13.2 4455. 3.472 2095. 13.21 4460. 3.466 2100. 13.22 4465. 3.44 2105. 13.21 4470. 3.416 2110. 13.23 4475. 3.41 2115. 13.22 4480. 3.396 2120. 13.23 4485. 3.39 2125. 13.25 4490. 3.372 2130. 13.25 4495. 3.353 2135. 13.26 4500. 3.338 2140. 13.26 4505. 3.313 2145. 13.28 4510. 3.307 2150. 13.29 4515. 3.279 2155. 13.29 4520. 3.27 2160. 13.3 4525. 3.258 2165. 13.31 4530. 3.264 2170. 13.31 4535. 3.234 2175. 13.32 4540. 3.225 2180. 13.32 4545. 3.207 2185. 13.33 4550. 3.198 2190. 13.33 4555. 3.194 2195. 13.35 4560. 3.166 2200. 13.36 4565. 3.171 2205. 13.36 4570. 3.135 2210. 13.38 4575. 3.134 2215. 13.38 4580. 3.123 2220. 13.41 4585. 3.093 2225. 13.55 4590. 3.094 2230. 13.76 4595. 3.086 2235. 13.97 4600. 3.065 2240. 14.18 4605. 3.06 2245. 14.34 4610. 3.051 2250. 14.51 4615. 3.034 2255. 14.67 4620. 3.025 2260. 14.83 4625. 3.016 2265. 14.99 4630. 3.005 2270. 15.13 4635. 2.984 2275. 15.27 4640. 2.975 2280. 15.41 4645. 2.966 2285. 15.54 4650. 2.954 2290. 15.67 4655. 2.945 2295. 15.8 4660. 2.945 2300. 15.93 4665. 2.924 2305. 16.05 4670. 2.915 2310. 16.16 4675. 2.904 2315. 16.28 4680. 2.883 2320. 16.38 4685. 2.883 2325. 16.48 4690. 2.874 2330. 16.6 4695. 2.875 2335. 16.72 4700. 2.865 2340. 16.8 4705. 2.852 2345. 16.89 4710. 2.842 11 /21 /22 8 12:52:49 AQTESOLV for Windows Time (sec) Displacement (ft) Time sec) Displacement (ft) 23b0. 16.9/ 4/15. 2.821 2355. 17.06 4720. 2.82 2360. 17.13 4725. 2.798 2365. 17.22 4730. 2.795 SOLUTION Pumping Test Aquifer Model: Confined Solution Method: Theis (Step Test) VISUAL ESTIMATION RESULTS Estimated Parameters Parameter Estimate T 8.239E-5 ft2/sec S 0.005904 Sw-0.0693 C 0. sec2/ft5 P 3. K = T/b = 6.337E-6 ft/sec (0.0001932 cm/sec) Ss = S/b = 0.0004541 1 /ft AUTOMATIC ESTIMATION RESULTS Estimated Parameters Parameter Estimate Std. Error Approx. C.I. t-Ratio T 8.239E-5 1.333E-6 +/- 2.616E-6 61.8 ft2/sec S 0.005904 0.003878 +/- 0.007608 1.523 Sw-0.0693 0.3323 +/- 0.652 -0.2085 C 0. 9.072E+6 +/- 1.78E+7 0. sec2/ft5 P 3. 1.54 +/- 3.021 1.948 C.I. is approximate 95% confidence interval for parameter t-ratio = estimate/std. error No estimation window K = T/b = 6.337E-6 ft/sec (0.0001932 cm/sec) Ss = S/b = 0.0004541 1 /ft Parameter Correlations T S Sw C P T 1.00 0.60 0.66 0.02 0.00 S 0.60 1.00 0.99 -0.08 0.00 Sw 0.66 0.99 1.00 -0.15 0.00 C 0.02 -0.08 -0.15 1.00 0.00 P 0.00 0.00 0.00 0.00 1.00 Residual Statistics for weighted residuals Sum of Squares 2231. ft2 Variance 2 371 ft2 Std. Deviation 1 54 ft Mean -0.01884 ft No. of Residuals 946 No. of Estimates 5 STEP TEST ANALYSIS RESULTS Jacob-Rorabaugh Step Test Model: s(t) = BQ + CQP 11 /21 /22 9 12:52:49 AQTESOLV for Windows t = 1.sec Q in cu.ft/sec B = -126.3 C=O. P = 3. Eden -Hazel Step Test Model: s(t) = (a + b Iog10(t))Q + CQP Q in cu.ft/sec a =-1309.6 b = 2224.5 C=O. P = 3. Well Efficiency:-6.034% (Q from last step) 11 /21 /22 10 12:52:49 AQTESOLV for Windows Data Set: P:\300-000\300-226\-Draft Documents\Task 0017-CSM Refinement\Aquifer Testing\Aqtesolv files\New p� Date: 11/21/22 Time: 12:52:07 PROJECT INFORMATION Company: CEC Client: ALCOA Project: 300-226 Location: Badin, North Carolina Test Date: 9/29/22 Test Well: MW-203 AQUIFER DATA Saturated Thickness: 12. ft Anisotropy Ratio (Kz/Kr): 1. PUMPING WELL DATA No. of pumping wells: 1 Pumping Well No. 1: MW-203 X Location: 0. ft Y Location: 0. ft Casing Radius: 0.083 ft Well Radius: 0.349 ft Partially Penetrating Well Depth to Top of Screen: 2. ft Depth to Bottom of Screen: 12. ft No. of pumping periods: 3 Pum. ing Period Data Time (sec) Rate (L/min Tisec) U. 1.6 me 2885. 1550. 2.4 Rate (L/min) OBSERVATION WELL DATA No. of observation wells: 1 Observation Well No. 1: MW-203 X Location: 0. ft Y Location: 0. ft Radial distance from MW-203: 0. ft Partially Penetrating Well Depth to Top of Screen: 2. ft Depth to Bottom of Screen: 12. ft No. of Observations: 851 Observation Data Time (sec) Displacement (ft) I ime sec) Displacement (ft) 5. 0.132 / 2135. 21.72 10. 0.2565 2140. 21.75 15. 0.2869 2145. 21.77 20. 0.2786 2150. 21.79 25. 0.2673 2155. 21.79 30. 0.2679 2160. 21.82 35. 0.2686 2165. 21.84 11/21/22 1 12:52:07 AQTESOLV for Windows Time sec) Displacement (ft) Time (sec) Displacement (ft) 4 0.2693 21 %0. 21.84 45. 0.291 2175. 21.86 50. 0.282 2180. 21.89 55. 0.282 2185. 21.91 60. 0.27 2190. 21.96 65. 0.3331 2195. 21.97 70. 0.3843 2200. 22. 75. 0.4053 2205. 22.02 80. 0.4141 2210. 22.04 85. 0.516 2215. 22.08 90. 0.5789 2220. 22.1 95. 0.6298 2225. 22.13 100. 0.6686 2230. 22.15 105. 0.7104 2235. 22.17 110. 0.7618 2240. 22.19 115. 0.8223 2245. 22.22 120. 0.9579 2250. 22.24 125. 1.099 2255. 22.27 130. 1.244 2260. 22.3 135. 1.368 2265. 22.32 140. 1.483 2270. 22.35 145. 1.595 2275. 22.36 150. 1.72 2280. 22.38 155. 1.844 2285. 22.4 160. 1.957 2290. 22.42 165. 2.072 2295. 22.45 170. 2.173 2300. 22.46 175. 2.286 2305. 22.49 180. 2.366 2310. 22.51 185. 2.467 2315. 22.54 190. 2.567 2320. 22.56 195. 2.659 2325. 22.59 200. 2.72 2330. 22.61 205. 2.802 2335. 22.63 210. 2.803 2340. 22.66 215. 2.854 2345. 22.67 220. 2.99 2350. 22.69 225. 3.145 2355. 22.68 230. 3.204 2360. 22.68 235. 3.267 2365. 22.68 240. 3.327 2370. 22.68 245. 3.399 2375. 22.69 250. 3.461 2380. 22.69 255. 3.521 2385. 22.7 260. 3.593 2390. 22.7 265. 3.623 2395. 22.7 270. 3.686 2400. 22.7 275. 3.726 2405. 22.7 280. 3.777 2410. 22.7 285. 3.819 2415. 22.7 290. 3.849 2420. 22.69 295. 3.892 2425. 22.7 300. 3.943 2430. 22.71 305. 3.974 2435. 22.7 310. 4.016 2440. 22.71 315. 4.035 2445. 22.71 320. 4.068 2450. 22.72 325. 4.098 2455. 22.72 330. 4.14 2460. 22.73 335. 4.2 2465. 22.74 340. 4.242 2470. 22.74 345. 4.26 2475. 22.74 350. 4.282 2480. 22.74 355. 4.294 2485. 22.75 360. 4.282 2490. 22.75 365. 4.273 2495. 22.75 11/21/22 2 12:52:07 AQTESOLV for Windows Time sec) Displacement (ft) Time sec) Displacement (ft) f/ 4.274 2500. 22. /4 375. 4.262 2505. 22.73 380. 4.274 2510. 22.75 385. 4.274 2515. 22.76 390. 4.295 2520. 22.76 395. 4.316 2525. 22.75 400. 4.346 2530. 22.76 405. 4.367 2535. 22.77 410. 4.397 2540. 22.77 415. 4.426 2545. 22.78 420. 4.455 2550. 22.79 425. 4.497 2555. 22.79 430. 4.538 2560. 22.8 435. 4.577 2565. 22.8 440. 4.628 2570. 22.83 445. 4.679 2575. 22.83 450. 4.742 2580. 22.83 455. 4.793 2585. 22.85 460. 4.844 2590. 22.87 465. 4.895 2595. 22.87 470. 4.977 2600. 22.88 475. 5.029 2605. 22.9 480. 5.11 2610. 22.92 485. 5.195 2615. 22.92 490. 5.267 2620. 22.93 495. 5.349 2625. 22.94 500. 5.409 2630. 22.95 505. 5.452 2635. 22.96 510. 5.503 2640. 22.98 515. 5.555 2645. 22.98 520. 5.627 2650. 22.98 525. 5.678 2655. 22.99 530. 5.699 2660. 23.01 535. 5.749 2665. 23.01 540. 5.799 2670. 23.02 545. 5.87 2675. 23.03 550. 5.95 2680. 23.05 555. 6.031 2685. 23.06 560. 6.133 2690. 23.06 565. 6.236 2695. 23.07 570. 6.341 2700. 23.09 575. 6.432 2705. 23.12 580. 6.525 2710. 23.13 585. 6.619 2715. 23.14 590. 6.721 2720. 23.16 595. 6.824 2725. 23.17 600. 6.906 2730. 23.17 605. 6.987 2735. 23.1 610. 7.06 2740. 23.12 615. 7.153 2745. 23.14 620. 7.246 2750. 23.15 625. 7.348 2755. 23.16 630. 7.45 2760. 23.17 635. 7.552 2765. 23.18 640. 7.654 2770. 23.14 645. 7.777 2775. 23.11 650. 7.888 2780. 23.11 655. 7.982 2785. 23.1 660. 8.094 2790. 23.1 665. 8.208 2795. 23.11 670. 8.32 2800. 23.1 675. 8.444 2805. 23.09 680. 8.536 2810. 23.08 685. 8.617 2815. 23.06 690. 8.71 2820. 23.08 695. 8.782 2825. 23.08 11/21/22 3 12:52:07 AQTESOLV for Windows Time sec) Displacement (ft) Time sec) Displacement (ft) 7U 8.833 2�i3U. 23.08 705. 8.892 2835. 23.08 710. 8.943 2840. 22.92 715. 9.016 2845. 22.8 720. 9.079 2850. 22.7 725. 9.1 2855. 22.62 730. 9.139 2860. 22.55 735. 9.202 2865. 22.48 740. 9.254 2870. 22.39 745. 9.378 2875. 22.33 750. 9.511 2880. 22.26 755. 9.656 2885. 22.19 760. 9.789 2890. 22.11 765. 9.934 2895. 22.03 770. 10.08 2900. 21.95 775. 10.21 2905. 21.88 780. 10.34 2910. 21.81 785. 10.47 2915. 21.75 790. 10.59 2920. 21.66 795. 10.72 2925. 21.61 800. 10.85 2930. 21.53 805. 10.95 2935. 21.47 810. 11.08 2940. 21.4 815. 11.18 2945. 21.34 820. 11.3 2950. 21.26 825. 11.42 2955. 21.2 830. 11.53 2960. 21.13 835. 11.64 2965. 21.06 840. 11.74 2970. 21. 845. 11.85 2975. 20.93 850. 11.94 2980. 20.85 855. 12.04 2985. 20.77 860. 12.13 2990. 20.69 865. 12.22 2995. 20.62 870. 12.31 3000. 20.56 875. 12.4 3005. 20.48 880. 12.48 3010. 20.42 885. 12.58 3015. 20.36 890. 12.65 3020. 20.29 895. 12.72 3025. 20.23 900. 12.8 3030. 20.16 905. 12.88 3035. 20.1 910. 12.95 3040. 20.03 915. 13.03 3045. 19.96 920. 13.11 3050. 19.89 925. 13.18 3055. 19.82 930. 13.24 3060. 19.75 935. 13.31 3065. 19.68 940. 13.37 3070. 19.61 945. 13.43 3075. 19.56 950. 13.49 3080. 19.5 955. 13.54 3085. 19.44 960. 13.62 3090. 19.38 965. 13.7 3095. 19.31 970. 13.77 3100. 19.25 975. 13.84 3105. 19.19 980. 13.91 3110. 19.14 985. 13.99 3115. 19.07 990. 14.06 3120. 19.01 995. 14.12 3125. 18.96 1000. 14.17 3130. 18.89 1005. 14.24 3135. 18.83 1010. 14.31 3140. 18.77 1015. 14.35 3145. 18.71 1020. 14.4 3150. 18.64 1025. 14.47 3155. 18.58 11/21/22 4 12:52:07 AQTESOLV for Windows Time sec) Displacement (ft) Time (sec) Displacement (ft) 1 U3U. 14.51 31 bU. 18.52 1035. 14.56 3165. 18.45 1040. 14.62 3170. 18.38 1045. 14.66 3175. 18.32 1050. 14.71 3180. 18.25 1055. 14.75 3185. 18.18 1060. 14.81 3190. 18.12 1065. 14.85 3195. 18.05 1070. 14.89 3200. 17.97 1075. 14.92 3205. 17.9 1080. 14.98 3210. 17.84 1085. 15.01 3215. 17.76 1090. 15.07 3220. 17.7 1095. 15.1 3225. 17.63 1100. 15.14 3230. 17.57 1105. 15.18 3235. 17.51 1110. 15.21 3240. 17.45 1115. 15.24 3245. 17.36 1120. 15.28 3250. 17.3 1125. 15.31 3255. 17.24 1130. 15.35 3260. 17.19 1135. 15.38 3265. 17.13 1140. 15.42 3270. 17.06 1145. 15.45 3275. 17. 1150. 15.46 3280. 16.95 1155. 15.51 3285. 16.88 1160. 15.53 3290. 16.83 1165. 15.55 3295. 16.78 1170. 15.59 3300. 16.71 1175. 15.62 3305. 16.65 1180. 15.64 3310. 16.57 1185. 15.68 3315. 16.57 1190. 15.7 3320. 16.49 1195. 15.72 3325. 16.4 1200. 15.74 3330. 16.34 1205. 15.76 3335. 16.27 1210. 15.78 3340. 16.22 1215. 15.8 3345. 16.16 1220. 15.81 3350. 16.1 1225. 15.84 3355. 16.05 1230. 15.84 3360. 15.99 1235. 15.88 3365. 15.93 1240. 15.9 3370. 15.82 1245. 15.93 3375. 15.67 1250. 15.94 3380. 15.52 1255. 15.96 3385. 15.38 1260. 15.98 3390. 15.24 1265. 16. 3395. 15.08 1270. 16. 3400. 14.95 1275. 16.03 3405. 14.8 1280. 16.02 3410. 14.66 1285. 16.02 3415. 14.53 1290. 16.02 3420. 14.38 1295. 16.03 3425. 14.24 1300. 16.03 3430. 14.11 1305. 16.04 3435. 13.97 1310. 16.04 3440. 13.84 1315. 16.05 3445. 13.71 1320. 16.05 3450. 13.57 1325. 16.06 3455. 13.44 1330. 16.06 3460. 13.3 1335. 16.05 3465. 13.18 1340. 16.07 3470. 13.06 1345. 16.08 3475. 12.92 1350. 16.08 3480. 12.79 1355. 16.08 3485. 12.67 11 /21 /22 5 12:52:07 AQTESOLV for Windows Time (sec) Displacement (ft) Time sec) Displacement (ft) 1 3b0. 16.1 349U. 12.53 1365. 16.1 3495. 12.41 1370. 16.1 3500. 12.28 1375. 16.09 3505. 12.16 1380. 16.09 3510. 12.04 1385. 16.09 3515. 11.93 1390. 16.1 3520. 11.81 1395. 16.11 3525. 11.69 1400. 16.11 3530. 11.56 1405. 16.11 3535. 11.45 1410. 16.13 3540. 11.32 1415. 16.12 3545. 11.21 1420. 16.13 3550. 11.09 1425. 16.13 3555. 10.97 1430. 16.13 3560. 10.85 1435. 16.14 3565. 10.74 1440. 16.14 3570. 10.64 1445. 16.15 3575. 10.52 1450. 16.15 3580. 10.41 1455. 16.15 3585. 10.31 1460. 16.15 3590. 10.19 1465. 16.14 3595. 10.09 1470. 16.15 3600. 9.976 1475. 16.15 3605. 9.874 1480. 16.15 3610. 9.75 1485. 16.15 3615. 9.656 1490. 16.16 3620. 9.554 1495. 16.16 3625. 9.453 1500. 16.17 3630. 9.339 1505. 16.17 3635. 9.249 1510. 16.17 3640. 9.148 1515. 16.19 3645. 9.034 1520. 16.3 3650. 8.941 1525. 16.39 3655. 8.851 1530. 16.49 3660. 8.748 1535. 16.57 3665. 8.655 1540. 16.66 3670. 8.553 1545. 16.74 3675. 8.451 1550. 16.82 3680. 8.358 1555. 16.9 3685. 8.265 1560. 16.97 3690. 8.184 1565. 17.03 3695. 8.082 1570. 17.09 3700. 8.002 1575. 17.17 3705. 7.909 1580. 17.23 3710. 7.827 1585. 17.31 3715. 7.734 1590. 17.38 3720. 7.64 1595. 17.45 3725. 7.549 1600. 17.51 3730. 7.468 1605. 17.59 3735. 7.383 1610. 17.66 3740. 7.302 1615. 17.73 3745. 7.21 1620. 17.79 3750. 7.129 1625. 17.85 3755. 7.057 1630. 17.91 3760. 6.976 1635. 17.99 3765. 6.883 1640. 18.04 3770. 6.802 1645. 18.11 3775. 6.729 1650. 18.18 3780. 6.657 1655. 18.25 3785. 6.584 1660. 18.31 3790. 6.502 1665. 18.37 3795. 6.43 1670. 18.42 3800. 6.349 1675. 18.48 3805. 6.269 1680. 18.53 3810. 6.186 1685. 18.58 3815. 6.117 11/21/22 6 12:52:07 AQTESOLV for Windows Time sec) Displacement (ft) Time sec) Displacement (ft) 1690. 18.63 382U. 6.055 1695. 18.69 3825. 5.984 1700. 18.74 3830. 5.902 1705. 18.78 3835. 5.838 1710. 18.83 3840. 5.769 1715. 18.88 3845. 5.696 1720. 18.92 3850. 5.633 1725. 18.97 3855. 5.56 1730. 19.01 3860. 5.5 1735. 19.05 3865. 5.427 1740. 19.1 3870. 5.354 1745. 19.14 3875. 5.303 1750. 19.18 3880. 5.23 1755. 19.21 3885. 5.17 1760. 19.25 3890. 5.107 1765. 19.29 3895. 5.048 1770. 19.32 3900. 4.989 1775. 19.37 3905. 4.926 1780. 19.41 3910. 4.876 1785. 19.45 3915. 4.817 1790. 19.48 3920. 4.753 1795. 19.51 3925. 4.681 1800. 19.54 3930. 4.629 1805. 19.57 3935. 4.568 1810. 19.61 3940. 4.517 1815. 19.65 3945. 4.453 1820. 19.69 3950. 4.413 1825. 19.73 3955. 4.349 1830. 19.77 3960. 4.297 1835. 19.81 3965. 4.235 1840. 19.86 3970. 4.183 1845. 19.9 3975. 4.131 1850. 19.96 3980. 4.08 1855. 20. 3985. 4.027 1860. 20.04 3990. 3.976 1865. 20.08 3995. 3.925 1870. 20.11 4000. 3.874 1875. 20.16 4005. 3.824 1880. 20.18 4010. 3.774 1885. 20.23 4015. 3.736 1890. 20.26 4020. 3.686 1895. 20.31 4025. 3.636 1900. 20.34 4030. 3.595 1905. 20.38 4035. 3.545 1910. 20.41 4040. 3.514 1915. 20.43 4045. 3.463 1920. 20.46 4050. 3.412 1925. 20.5 4055. 3.37 1930. 20.54 4060. 3.328 1935. 20.58 4065. 3.289 1940. 20.61 4070. 3.247 1945. 20.64 4075. 3.196 1950. 20.68 4080. 3.166 1955. 20.72 4085. 3.114 1960. 20.75 4090. 3.072 1965. 20.78 4095. 3.042 1970. 20.81 4100. 2.999 1975. 20.83 4105. 2.959 1980. 20.87 4110. 2.917 1985. 20.87 4115. 2.874 1990. 20.9 4120. 2.843 1995. 20.93 4125. 2.812 2000. 20.97 4130. 2.783 2005. 21.04 4135. 2.742 2010. 21.05 4140. 2.701 2015. 21.09 4145. 2.672 11/21/22 7 12:52:07 AQTESOLV for Windows Time sec) Displacement (ft) Time (sec) Displacement (ft) 2U2U. 21.13 415U. 2.631 2025. 21.15 4155. 2.602 2030. 21.19 4160. 2.562 2035. 21.22 4165. 2.528 2040. 21.23 4170. 2.489 2045. 21.26 4175. 2.455 2050. 21.29 4180. 2.415 2055. 21.32 4185. 2.372 2060. 21.34 4190. 2.342 2065. 21.36 4195. 2.311 2070. 21.39 4200. 2.29 2075. 21.42 4205. 2.259 2080. 21.47 4210. 2.226 2085. 21.49 4215. 2.207 2090. 21.52 4220. 2.175 2095. 21.55 4225. 2.145 2100. 21.58 4230. 2.115 2105. 21.6 4235. 2.095 2110. 21.62 4240. 2.065 2115. 21.65 4245. 2.035 2120. 21.68 4250. 2. 2125. 21.7 4255. 1.968 2130. 21.7 SOLUTION Pumping Test Aquifer Model: Confined Solution Method: Theis (Step Test) VISUAL ESTIMATION RESULTS Estimated Parameters Parameter Estimate T 1.661E-5 ft2/sec S 0.03075 Sw 0. C 1. sec2/ft5 P 1.5 K = T/b = 1.384E-6 ft/sec (4.218E-5 cm/sec) Ss = S/b = 0.002562 1 /ft AUTOMATIC ESTIMATION RESULTS Estimated Parameters Parameter Estimate Std. Error Approx. C.I. t-Ratio T 1.661E-5 2.394E4 +/-4.699E-/ 69.3/ ft2/sec S 0.03075 0.003031 +/- 0.005951 10.14 Sw 0. not estimated C 1. 9.75E+4 +/- 1.914E+5 1.026E-5 sec2/ft5 P 1.5 1.564E+4 +/- 3.07E+4 9.59E-5 C.I. is approximate 95% confidence interval for parameter t-ratio = estimate/std. error No estimation window K = T/b = 1.384E-6 ft/sec (4.218E-5 cm/sec) Ss = S/b = 0.002562 1/ft Parameter Correlations T S C P T 1 00 -O 63 0 4 0 8 11/21/22 8 12:52:07 AQTESOLV for Windows S -0.63 1.00 -0.35 -0.45 C 0.34 -0.35 1.00 0.99 P 0.38 -0.45 0.99 1.00 Residual Statistics for weighted residuals Sum of Squares 4660. ft2 Variance 5 502 ft2 Std. Deviation 2 346 ft Mean -0.387 ft No. of Residuals 851 No. of Estimates 4 STEP TEST ANALYSIS RESULTS Jacob-Rorabaugh Step Test Model: s(t) = BQ + CQP t = 1.sec Q in cu.ft/sec B = 0. C=1. P = 1.5 Eden -Hazel Step Test Model: s(t) = (a + b Iog10(t))Q + CQP Q in cu.ft/sec a = -2.208E+4 b = 1.104E+4 C=1. P = 1.5 Well Efficiency: 0.% (Q from last step) 11/21/22 9 12:52:07 AQTESOLV for Windows Data Set: P:\300-000\300-226\-Draft Documents\Task 0017-CSM Refinement\Aquifer Testing\Aqtesolv files\New p� Date: 11/21/22 Time: 12:54:06 PROJECT INFORMATION Company: CEC Client: ALCOA Project: 300-226 Location: Badin, North Carolina Test Date: 9/26/22 Test Well: MW-205 AQUIFER DATA Saturated Thickness: 14.5 ft Anisotropy Ratio (Kz/Kr): 1. PUMPING WELL DATA No. of pumping wells: 1 Pumping Well No. 1: MW-205 X Location: 0. ft Y Location: 0. ft Casing Radius: 0.083 ft Well Radius: 0.349 ft Partially Penetrating Well Depth to Top of Screen: 4.5 ft Depth to Bottom of Screen: 14.5 ft No. of pumping periods: 9 Pum. ing Period Data Time (sec) Rate (Limn Time sec) Rate (L/min) U. 0.2 2815. 4 600. 0.5 3235. 6. 1165. 1. 3715. 7.3 1430. 2. 3900. 0. 2315. 3. OBSERVATION WELL DATA No. of observation wells: 1 Observation Well No. 1: MW-205 X Location: 0. ft Y Location: 0. ft Radial distance from MW-205: 0. ft Partially Penetrating Well Depth to Top of Screen: 4.5 ft Depth to Bottom of Screen: 14.5 ft No. of Observations: 813 Observation Data Time (sec) Dis lacement (ft) Time (sec) Displacement (ft) 5. 03 2U4U. 1.549 10. 0.003 2045. 1.575 15. 0.007 2050. 1.545 20. 0.007 2055. 1.589 11/21/22 1 12:54:06 AQTESOLV for Windows Time (sec) Displacement (ft) Time (sec) Displacement (ft) 25. 0.00 / 20b0. 1.609 30. 0.007 2065. 1.642 35. 0.01 2070. 1.652 40. 0.01 2075. 1.706 45. 0.01 2080. 1.713 50. 0.007 2085. 1.716 55. 0.01 2090. 1.719 60. 0.06 2095. 1.672 65. 0.114 2100. 1.555 70. 0.081 2105. 1.525 75. 0.091 2110. 1.475 80. 0.124 2115. 1.425 85. 0.184 2120. 1.374 90. 0.265 2125. 1.341 95. 0.345 2130. 1.311 100. 0.422 2135. 1.267 105. 0.329 2140. 1.22 110. 0.164 2145. 1.173 115. 0.084 2150. 1.126 120. 0.087 2155. 1.116 125. 0.081 2160. 1.106 130. 0.097 2165. 1.143 135. 0.107 2170. 1.163 140. 0.107 2175. 1.203 145. 0.101 2180. 1.25 150. 0.097 2185. 1.291 155. 0.087 2190. 1.277 160. 0.077 2195. 1.334 165. 0.084 2200. 1.358 170. 0.081 2205. 1.371 175. 0.074 2210. 1.384 180. 0.091 2215. 1.381 185. 0.084 2220. 1.381 190. 0.084 2225. 1.394 195. 0.094 2230. 1.388 200. 0.097 2235. 1.401 205. 0.091 2240. 1.428 210. 0.091 2245. 1.451 215. 0.097 2250. 1.468 220. 0.097 2255. 1.471 225. 0.094 2260. 1.478 230. 0.094 2265. 1.471 235. 0.104 2270. 1.468 240. 0.097 2275. 1.475 245. 0.091 2280. 1.482 250. 0.094 2285. 1.485 255. 0.097 2290. 1.485 260. 0.097 2295. 1.475 265. 0.097 2300. 1.448 270. 0.101 2305. 1.435 275. 0.097 2310. 1.425 280. 0.097 2315. 1.408 285. 0.104 2320. 1.391 290. 0.104 2325. 1.384 295. 0.107 2330. 1.498 300. 0.107 2335. 1.662 305. 0.107 2340. 1.786 310. 0.097 2345. 1.894 315. 0.101 2350. 1.987 320. 0.104 2355. 2.071 325. 0.097 2360. 2.138 330. 0.094 2365. 2.195 335. 0.094 2370. 2.245 340. 0.097 2375. 2.282 345. 0.101 2380. 2.309 350. 0.094 2385. 2.332 11 /21 /22 2 12:54:06 AQTESOLV for Windows Time (sec) Displacement (ft) Time sec) Displacement (ft) 355. 0.09 / 2390. 2.366 360. 0.091 2395. 2.396 365. 0.094 2400. 2.423 370. 0.094 2405. 2.45 375. 0.091 2410. 2.497 380. 0.101 2415. 2.537 385. 0.097 2420. 2.574 390. 0.101 2425. 2.59 395. 0.09 2430. 2.597 400. 0.08 2435. 2.631 405. 0.09 2440. 2.641 410. 0.08 2445. 2.621 415. 0.084 2450. 2.624 420. 0.094 2455. 2.651 425. 0.1 2460. 2.681 430. 0.097 2465. 2.698 435. 0.087 2470. 2.734 440. 0.084 2475. 2.768 445. 0.087 2480. 2.798 450. 0.094 2485. 2.818 455. 0.094 2490. 2.842 460. 0.1 2495. 2.858 465. 0.1 2500. 2.869 470. 0.114 2505. 2.885 475. 0.097 2510. 2.902 480. 0.1 2515. 2.919 485. 0.087 2520. 2.932 490. 0.087 2525. 2.952 495. 0.097 2530. 2.969 500. 0.087 2535. 2.979 505. 0.094 2540. 2.996 510. 0.087 2545. 3.009 515. 0.067 2550. 3.029 520. 0.07 2555. 3.043 525. 0.033 2560. 3.049 530. 0.084 2565. 3.063 535. 0.094 2570. 3.073 540. 0.1 2575. 3.073 545. 0.094 2580. 3.073 550. 0.087 2585. 3.076 555. 0.09 2590. 3.083 560. 0.087 2595. 3.083 565. 0.067 2600. 3.086 570. 0.07 2605. 3.09 575. 0.064 2610. 3.09 580. 0.07 2615. 3.09 585. 0.07 2620. 3.096 590. 0.07 2625. 3.11 595. 0.08 2630. 3.12 600. 0.097 2635. 3.133 605. 0.117 2640. 3.137 610. 0.124 2645. 3.15 615. 0.147 2650. 3.147 620. 0.352 2655. 3.147 625. 0.456 2660. 3.147 630. 0.502 2665. 3.143 635. 0.533 2670. 3.137 640. 0.509 2675. 3.133 645. 0.476 2680. 3.137 650. 0.422 2685. 3.133 655. 0.399 2690. 3.133 660. 0.369 2695. 3.12 665. 0.335 2700. 3.116 670. 0.318 2705. 3.123 675. 0.302 2710. 3.126 680. 0.271 2715. 3.126 11 /21 /22 3 12:54:06 AQTESOLV for Windows Time (sec) Displacement (ft) Time sec) Displacement (ft) E�8 0.241 2 /20. 3.126 690. 0.225 2725. 3.13 695. 0.218 2730. 3.13 700. 0.198 2735. 3.14 705. 0.194 2740. 3.147 710. 0.191 2745. 3.147 715. 0.178 2750. 3.157 720. 0.184 2755. 3.137 725. 0.168 2760. 3.143 730. 0.178 2765. 3.147 735. 0.174 2770. 3.1 740. 0.178 2775. 3.096 745. 0.181 2780. 3.1 750. 0.181 2785. 3.11 755. 0.178 2790. 3.113 760. 0.174 2795. 3.113 765. 0.178 2800. 3.096 770. 0.174 2805. 3.103 775. 0.168 2810. 3.1 780. 0.164 2815. 3.103 785. 0.168 2820. 3.11 790. 0.174 2825. 3.1 795. 0.161 2830. 3.096 800. 0.171 2835. 3.133 805. 0.164 2840. 3.261 810. 0.168 2845. 3.378 815. 0.171 2850. 3.502 820. 0.168 2855. 3.609 825. 0.171 2860. 3.726 830. 0.178 2865. 3.833 835. 0.178 2870. 3.914 840. 0.178 2875. 3.998 845. 0.181 2880. 4.085 850. 0.178 2885. 4.168 855. 0.175 2890. 4.245 860. 0.178 2895. 4.319 865. 0.181 2900. 4.383 870. 0.188 2905. 4.443 875. 0.188 2910. 4.493 880. 0.188 2915. 4.547 885. 0.188 2920. 4.601 890. 0.198 2925. 4.658 895. 0.195 2930. 4.704 900. 0.205 2935. 4.715 905. 0.205 2940. 4.798 910. 0.198 2945. 4.845 915. 0.175 2950. 4.892 920. 0.158 2955. 4.936 925. 0.144 2960. 4.983 930. 0.168 2965. 5.026 935. 0.168 2970. 5.063 940. 0.168 2975. 5.107 945. 0.171 2980. 5.15 950. 0.178 2985. 5.187 955. 0.181 2990. 5.217 960. 0.191 2995. 5.254 965. 0.205 3000. 5.287 970. 0.211 3005. 5.318 975. 0.208 3010. 5.344 980. 0.211 3015. 5.381 985. 0.205 3020. 5.405 990. 0.205 3025. 5.438 995. 0.198 3030. 5.472 1000. 0.198 3035. 5.485 1005. 0.201 3040. 5.485 1010. 0.198 3045. 5.498 11 /21 /22 4 12: 54: 06 AQTESOLV for Windows Time sec) Displacement (ft) Time (sec) Displacement (ft) 1 U15. 0.198 3U5U. 5.502 1020. 0.195 3055. 5.502 1025. 0.198 3060. 5.512 1030. 0.195 3065. 5.522 1035. 0.201 3070. 5.542 1040. 0.198 3075. 5.559 1045. 0.191 3080. 5.576 1050. 0.195 3085. 5.586 1055. 0.198 3090. 5.592 1060. 0.198 3095. 5.609 1065. 0.198 3100. 5.619 1070. 0.201 3105. 5.619 1075. 0.195 3110. 5.626 1080. 0.201 3115. 5.633 1085. 0.195 3120. 5.643 1090. 0.195 3125. 5.649 1095. 0.198 3130. 5.653 1100. 0.201 3135. 5.666 1105. 0.195 3140. 5.679 1110. 0.201 3145. 5.696 1115. 0.201 3150. 5.713 1120. 0.205 3155. 5.73 1125. 0.208 3160. 5.733 1130. 0.208 3165. 5.733 1135. 0.211 3170. 5.74 1140. 0.205 3175. 5.746 1145. 0.201 3180. 5.733 1150. 0.195 3185. 5.736 1155. 0.198 3190. 5.733 1160. 0.191 3195. 5.74 1165. 0.181 3200. 5.753 1170. 0.175 3205. 5.76 1175. 0.171 3210. 5.77 1180. 0.165 3215. 5.77 1185. 0.222 3220. 5.777 1190. 0.258 3225. 5.78 1195. 0.268 3230. 5.783 1200. 0.275 3235. 5.894 1205. 0.282 3240. 6.038 1210. 0.305 3245. 6.102 1215. 0.329 3250. 6.071 1220. 0.339 3255. 5.974 1225. 0.342 3260. 5.897 1230. 0.332 3265. 5.931 1235. 0.329 3270. 6.001 1240. 0.339 3275. 6.061 1245. 0.346 3280. 6.42 1250. 0.359 3285. 6.745 1255. 0.359 3290. 6.852 1260. 0.362 3295. 6.829 1265. 0.356 3300. 6.832 1270. 0.356 3305. 6.835 1275. 0.346 3310. 6.835 1280. 0.346 3315. 6.895 1285. 0.352 3320. 6.942 1290. 0.352 3325. 6.996 1295. 0.352 3330. 7.043 1300. 0.352 3335. 7.08 1305. 0.359 3340. 7.123 1310. 0.356 3345. 7.177 1315. 0.346 3350. 7.237 1320. 0.346 3355. 7.271 1325. 0.336 3360. 7.298 1330. 0.329 3365. 7.338 1335. 0.325 3370. 7.378 1340. 0.329 3375. 7.418 11 /21 /22 5 12:54:06 AQTESOLV for Windows Time sec) Displacement (ft) Time sec) Displacement (ft) 1345. 0.329 33 0. 7.442 1350. 0.339 3385. 7.472 1355. 0.339 3390. 7.495 1360. 0.336 3395. 7.522 1365. 0.329 3400. 7.542 1370. 0.319 3405. 7.837 1375. 0.315 3410. 7.877 1380. 0.319 3415. 7.917 1385. 0.319 3420. 7.964 1390. 0.319 3425. 8.004 1395. 0.322 3430. 8.051 1400. 0.322 3435. 8.095 1405. 0.319 3440. 8.132 1410. 0.329 3445. 8.175 1415. 0.326 3450. 8.202 1420. 0.329 3455. 8.229 1425. 0.342 3460. 8.266 1430. 0.419 3465. 8.309 1435. 0.453 3470. 8.329 1440. 0.486 3475. 8.366 1445. 0.496 3480. 8.293 1450. 0.54 3485. 8.336 1455. 0.58 3490. 8.319 1460. 0.607 3495. 8.303 1465. 0.634 3500. 8.226 1470. 0.661 3505. 8.246 1475. 0.691 3510. 8.209 1480. 0.724 3515. 8.199 1485. 0.751 3520. 8.202 1490. 0.805 3525. 8.239 1495. 0.865 3530. 8.195 1500. 0.912 3535. 8.185 1505. 0.939 3540. 8.249 1510. 0.969 3545. 8.296 1515. 0.996 3550. 8.313 1520. 1.002 3555. 8.336 1525. 0.999 3560. 8.353 1530. 1.019 3565. 8.363 1535. 1.016 3570. 8.39 1540. 0.996 3575. 8.413 1545. 0.975 3580. 8.433 1550. 0.959 3585. 8.453 1555. 0.925 3590. 8.48 1560. 0.882 3595. 8.504 1565. 0.862 3600. 8.51 1570. 0.835 3605. 8.547 1575. 0.821 3610. 8.564 1580. 0.808 3615. 8.598 1585. 0.831 3620. 8.624 1590. 0.818 3625. 8.591 1595. 0.801 3630. 8.608 1600. 0.815 3635. 8.621 1605. 0.868 3640. 8.634 1610. 0.932 3645. 8.634 1615. 0.992 3650. 8.614 1620. 1.039 3655. 8.554 1625. 1.086 3660. 8.527 1630. 1.073 3665. 8.537 1635. 1.11 3670. 8.531 1640. 1.167 3675. 8.524 1645. 1.183 3680. 8.514 1650. 1.177 3685. 8.507 1655. 1.153 3690. 8.48 1660. 1.133 3695. 8.464 1665. 1.123 3700. 8.45 1670. 1.103 3705. 8.427 11 /21 /22 6 12: 54: 06 AQTESOLV for Windows Time (sec) Displacement (ft) Time sec) Displacement (ft) 16 5. 1.0 /6 3 / 10. 8.366 1680. 1.136 3715. 8.306 1685. 1.113 3720. 8.289 1690. 1.083 3725. 8.303 1695. 1.056 3730. 8.309 1700. 1.036 3735. 8.356 1705. 0.996 3740. 8.403 1710. 0.935 3745. 8.433 1715. 0.929 3750. 8.467 1720. 0.915 3755. 8.494 1725. 0.976 3760. 8.527 1730. 1.043 3765. 8.557 1735. 1.083 3770. 8.577 1740. 1.12 3775. 8.611 1745. 1.116 3780. 8.644 1750. 1.146 3785. 8.685 1755. 1.19 3790. 8.715 1760. 1.14 3795. 8.738 1765. 1.059 3800. 8.775 1770. 1.113 3805. 8.795 1775. 1.167 3810. 8.825 1780. 1.197 3815. 8.839 1785. 1.22 3820. 8.855 1790. 1.26 3825. 8.882 1795. 1.247 3830. 8.906 1800. 1.304 3835. 8.926 1805. 1.381 3840. 8.949 1810. 1.358 3845. 8.963 1815. 1.331 3850. 8.973 1820. 1.344 3855. 8.953 1825. 1.374 3860. 8.983 1830. 1.364 3865. 9.003 1835. 1.347 3870. 9.013 1840. 1.428 3875. 9.026 1845. 1.451 3880. 9.036 1850. 1.518 3885. 9.057 1855. 1.548 3890. 9.063 1860. 1.555 3895. 9.073 1865. 1.538 3900. 9.083 1870. 1.559 3905. 9.097 1875. 1.612 3910. 9.107 1880. 1.659 3915. 9.113 1885. 1.679 3920. 9.124 1890. 1.703 3925. 9.09 1895. 1.739 3930. 8.963 1900. 1.76 3935. 8.996 1905. 1.78 3940. 8.899 1910. 1.776 3945. 8.842 1915. 1.763 3950. 8.812 1920. 1.796 3955. 8.718 1925. 1.83 3960. 8.604 1930. 1.857 3965. 8.44 1935. 1.84 3970. 8.279 1940. 1.709 3975. 8.115 1945. 1.696 3980. 7.927 1950. 1.669 3985. 7.733 1955. 1.656 3990. 7.572 1960. 1.646 3995. 7.438 1965. 1.609 4000. 7.271 1970. 1.595 4005. 7.11 1975. 1.592 4010. 6.983 1980. 1.582 4015. 6.778 1985. 1.565 4020. 6.014 1990. 1.585 4025. 4.741 1995. 1.622 4030. 3.705 2000. 1.646 4035. 2.888 11 /21 /22 7 12: 54: 06 AQTESOLV for Windows Time sec) Displacement (ft) Time (sec) Displacement (ft) 2UU5. 1.659 4U40. 2.355 2010. 1.636 4045. 1.946 2015. 1.636 4050. 1.383 2020. 1.639 4055. 0.954 2025. 1.646 4060. 0.582 2030. 1.582 4065. 0.257 2035. 1.532 SOLUTION Pumping Test Aquifer Model: Confined Solution Method: Theis (Step Test) VISUAL ESTIMATION RESULTS Estimated Parameters Parameter Estimate T 0.009595 ft2/min S 0.136 Sw 0. C 1. sec2/ft5 P 1.5 K = T/b = 0.0006617 ft/min (0.0003362 cm/sec) Ss = S/b = 0.009377 1/ft AUTOMATIC ESTIMATION RESULTS Estimated Parameters Parameter Estimate Std. Error Approx. C.I. t-Ratio T O.009595 0.000320/ +/- 0.0006295 29.92 ft2/min S 0.136 0.02533 +/- 0.04972 5.368 Sw 0. not estimated C 1. 6159.3 +/- 1.209E+4 0.0001624 sec2/ft5 P 1.5 1294.1 +/- 2540.4 0.001159 C.I. is approximate 95% confidence interval for parameter t-ratio = estimate/std. error No estimation window K = T/b = 0.0006617 ft/min (0.0003362 cm/sec) Ss = S/b = 0.009377 1/ft Parameter Correlations T S C P T 100 -079 042 047 S -0.79 1.00 -0.65 -0.75 C 0.42 -0.65 1.00 0.99 P 0.47 -0.75 0.99 1.00 Residual Statistics for weighted residuals Sum of Squares 461.9 ft2 Variance 0 571 ft2 Std. Deviation 0 7556 ft Mean -0.2356 ft No. of Residuals 813 No. of Estimates 4 STEP TEST ANALYSIS RESULTS 11 /21 /22 8 12: 54: 06 AQTESOLV for Windows Jacob-Rorabaugh Step Test Model: s(t) = BQ + CQP t = 1.sec Q in cu.ft/sec B = 1.498E-10 C = 1. P = 1.5 Eden -Hazel Step Test Model: s(t) = (a + b Iog10(t))Q + CQP Q in cu.ft/sec a =-1905.8 b = 1146. C=1. P = 1.5 Well Efficiency: 2.285E-7% (Q from last step) 11 /21 /22 9 12:54:06 AQTESOLV for Windows Data Set: P:\300-000\300-226\-Draft Documents\Task 0017-CSM Refinement\Aquifer Testing\Aqtesolv files\New p� Date: 11/21/22 Time: 12:50:07 PROJECT INFORMATION Company: CEC Client: ALCOA Project: 300-226 Location: Badin, North Carolina Test Date: 9/27/22 Test Well: MW-220 AQUIFER DATA Saturated Thickness: 6. ft Anisotropy Ratio (Kz/Kr): 1. PUMPING WELL DATA No. of pumping wells: 1 Pumping Well No. 1: MW-220 X Location: 0. ft Y Location: 0. ft Casing Radius: 0.083 ft Well Radius: 0.25 ft Partially Penetrating Well Depth to Top of Screen: 1. ft Depth to Bottom of Screen: 6. ft No. of pumping periods: 3 Pum. ing Period Data Time (sec) Rate (L/min Time (sec) U. 0.5 765. 510. 1.2 Rate (L/min) OBSERVATION WELL DATA No. of observation wells: 1 Observation Well No. 1: MW-220 X Location: 0. ft Y Location: 0. ft Radial distance from MW-220: 0. ft Partially Penetrating Well Depth to Top of Screen: 1. ft Depth to Bottom of Screen: 6. ft No. of Observations: 854 Observation Data Time (sec) Displacement (ft) I ime (sec) Displacement (ft) 5. 0.009432 214U. 4.965 10. 0.009843 2145. 4.943 15. 0.02228 2150. 4.91 20. 0.0257 2155. 4.931 25. 0.02578 2160. 4.828 30. 0.02578 2165. 4.807 35. 0.04683 2170. 4.807 11/21/22 1 12:50:07 AQTESOLV for Windows Time sec) Displacement (ft) Time (sec) Displacement (ft) 4 0.04683 21 5. 4.806 45. 0.0348 2180. 4.806 50. 0.04082 2185. 4.785 55. 0.05219 2190. 4.775 60. 0.06039 2195. 4.766 65. 0.05356 2200. 4.765 70. 0.05274 2205. 4.753 75. 0.05192 2210. 4.743 80. 0.0511 2215. 4.744 85. 0.05996 2220. 4.732 90. 0.08702 2225. 4.732 95. 0.06898 2230. 4.733 100. 0.06898 2235. 4.733 105. 0.078 2240. 4.716 110. 0.08702 2245. 4.704 115. 0.08681 2250. 4.704 120. 0.08653 2255. 4.695 125. 0.09829 2260. 4.695 130. 0.107 2265. 4.683 135. 0.1068 2270. 4.674 140. 0.1576 2275. 4.673 145. 0.4886 2280. 4.663 150. 0.8889 2285. 4.65 155. 1.208 2290. 4.649 160. 1.515 2295. 4.64 165. 1.873 2300. 4.639 170. 2.213 2305. 4.618 175. 2.553 2310. 4.608 180. 2.799 2315. 4.6 185. 3.038 2320. 4.571 190. 3.266 2325. 4.56 195. 3.491 2330. 4.531 200. 3.695 2335. 4.51 205. 3.797 2340. 4.489 210. 3.882 2345. 4.48 215. 3.952 2350. 4.459 220. 4.045 2355. 4.438 225. 4.118 2360. 4.42 230. 4.181 2365. 4.399 235. 4.247 2370. 4.378 240. 4.334 2375. 4.358 245. 4.382 2380. 4.337 250. 4.318 2385. 4.328 255. 4.267 2390. 4.317 260. 4.251 2395. 4.298 265. 4.27 2400. 4.276 270. 4.291 2405. 4.263 275. 4.313 2410. 4.241 280. 4.322 2415. 4.221 285. 4.322 2420. 4.199 290. 4.344 2425. 4.175 295. 4.335 2430. 4.176 300. 4.344 2435. 4.156 305. 4.357 2440. 4.135 310. 4.378 2445. 4.115 315. 4.438 2450. 4.107 320. 4.532 2455. 4.094 325. 4.644 2460. 4.063 330. 4.738 2465. 4.053 335. 4.832 2470. 4.031 340. 4.875 2475. 4.008 345. 4.876 2480. 3.998 350. 4.865 2485. 3.978 355. 4.864 2490. 3.967 360. 4.854 2495. 3.947 365. 4.853 2500. 3.93 11 /21 /22 2 12:50:07 AQTESOLV for Windows Time sec) Displacement (ft) Time sec) Displacement (ft) fi 4.84 2505. 3.919 375. 4.85 2510. 3.911 380. 4.849 2515. 3.89 385. 4.838 2520. 3.881 390. 4.85 2525. 3.847 395. 4.851 2530. 3.838 400. 4.852 2535. 3.826 405. 4.852 2540. 3.808 410. 4.853 2545. 3.795 415. 4.863 2550. 3.774 420. 4.854 2555. 3.756 425. 4.842 2560. 3.735 430. 4.843 2565. 3.723 435. 4.843 2570. 3.702 440. 4.856 2575. 3.702 445. 4.855 2580. 3.687 450. 4.863 2585. 3.663 455. 4.841 2590. 3.657 460. 4.862 2595. 3.636 465. 4.861 2600. 3.615 470. 4.923 2605. 3.606 475. 4.974 2610. 3.593 480. 5.026 2615. 3.584 485. 5.078 2620. 3.553 490. 5.171 2625. 3.541 495. 5.232 2630. 3.531 500. 5.304 2635. 3.52 505. 5.346 2640. 3.503 510. 5.385 2645. 3.482 515. 5.427 2650. 3.471 520. 5.435 2655. 3.453 525. 5.447 2660. 3.454 530. 5.446 2665. 3.433 535. 5.54 2670. 3.412 540. 5.6 2675. 3.399 545. 5.663 2680. 3.381 550. 5.714 2685. 3.369 555. 5.765 2690. 3.359 560. 5.816 2695. 3.347 565. 5.868 2700. 3.317 570. 5.919 2705. 3.329 575. 5.971 2710. 3.308 580. 6.034 2715. 3.296 585. 6.095 2720. 3.287 590. 6.146 2725. 3.267 595. 6.21 2730. 3.258 600. 6.27 2735. 3.238 605. 6.312 2740. 3.227 610. 6.384 2745. 3.218 615. 6.435 2750. 3.219 620. 6.495 2755. 3.189 625. 6.549 2760. 3.177 630. 6.569 2765. 3.168 635. 6.632 2770. 3.159 640. 6.712 2775. 3.138 645. 6.784 2780. 3.138 650. 6.834 2785. 3.125 655. 6.876 2790. 3.116 660. 6.924 2795. 3.094 665. 6.966 2800. 3.084 670. 7.005 2805. 3.071 675. 7.036 2810. 3.062 680. 7.09 2815. 3.041 685. 7.131 2820. 3.032 690. 7.191 2825. 3.02 695. 7.25 2830. 3. 11 /21 /22 3 12:50:07 AQTESOLV for Windows Time sec) Displacement (ft) Time sec) Displacement (ft) 7U 7.292 2�i35. 2.9 /9 705. 7.342 2840. 2.979 710. 7.405 2845. 2.97 715. 7.465 2850. 2.949 720. 7.517 2855. 2.94 725. 7.569 2860. 2.919 730. 7.591 2865. 2.919 735. 7.562 2870. 2.91 740. 7.551 2875. 2.897 745. 7.542 2880. 2.875 750. 7.521 2885. 2.865 755. 7.521 2890. 2.852 760. 7.521 2895. 2.842 765. 7.254 2900. 2.831 770. 6.986 2905. 2.82 775. 6.956 2910. 2.812 780. 6.956 2915. 2.8 785. 6.946 2920. 2.792 790. 6.946 2925. 2.784 795. 6.934 2930. 2.773 800. 6.915 2935. 2.763 805. 6.927 2940. 2.741 810. 6.906 2945. 2.732 815. 6.906 2950. 2.719 820. 6.906 2955. 2.709 825. 6.885 2960. 2.696 830. 6.885 2965. 2.696 835. 6.876 2970. 2.676 840. 6.863 2975. 2.667 845. 6.863 2980. 2.667 850. 6.842 2985. 2.647 855. 6.841 2990. 2.638 860. 6.841 2995. 2.626 865. 6.823 3000. 2.616 870. 6.823 3005. 2.607 875. 6.802 3010. 2.594 880. 6.802 3015. 2.573 885. 6.79 3020. 2.585 890. 6.78 3025. 2.573 895. 6.78 3030. 2.552 900. 6.771 3035. 2.544 905. 6.771 3040. 2.544 910. 6.759 3045. 2.514 915. 6.759 3050. 2.524 920. 6.75 3055. 2.514 925. 6.739 3060. 2.492 930. 6.73 3065. 2.482 935. 6.718 3070. 2.469 940. 6.719 3075. 2.467 945. 6.698 3080. 2.457 950. 6.687 3085. 2.445 955. 6.686 3090. 2.437 960. 6.676 3095. 2.425 965. 6.664 3100. 2.417 970. 6.654 3105. 2.408 975. 6.644 3110. 2.396 980. 6.632 3115. 2.408 985. 6.631 3120. 2.373 990. 6.61 3125. 2.363 995. 6.591 3130. 2.362 1000. 6.579 3135. 2.34 1005. 6.569 3140. 2.339 1010. 6.578 3145. 2.331 1015. 6.557 3150. 2.32 1020. 6.548 3155. 2.312 1025. 6.536 3160. 2.301 11 /21 /22 4 12:50:07 AQTESOLV for Windows Time sec) Displacement (ft) Time (sec) Displacement (ft) 1 U3U. 6.536 31 b5. 2.302 1035. 6.518 3170. 2.294 1040. 6.518 3175. 2.285 1045. 6.518 3180. 2.273 1050. 6.506 3185. 2.264 1055. 6.498 3190. 2.252 1060. 6.498 3195. 2.243 1065. 6.478 3200. 2.243 1070. 6.478 3205. 2.234 1075. 6.469 3210. 2.223 1080. 6.469 3215. 2.214 1085. 6.448 3220. 2.214 1090. 6.448 3225. 2.202 1095. 6.436 3230. 2.194 1100. 6.427 3235. 2.184 1105. 6.415 3240. 2.172 1110. 6.406 3245. 2.163 1115. 6.398 3250. 2.15 1120. 6.398 3255. 2.141 1125. 6.398 3260. 2.141 1130. 6.377 3265. 2.129 1135. 6.387 3270. 2.12 1140. 6.366 3275. 2.121 1145. 6.358 3280. 2.112 1150. 6.358 3285. 2.112 1155. 6.337 3290. 2.091 1160. 6.35 3295. 2.079 1165. 6.331 3300. 2.079 1170. 6.328 3305. 2.079 1175. 6.327 3310. 2.07 1180. 6.317 3315. 2.061 1185. 6.295 3320. 2.061 1190. 6.295 3325. 2.04 1195. 6.282 3330. 2.028 1200. 6.276 3335. 2.018 1205. 6.275 3340. 2.018 1210. 6.275 3345. 2.018 1215. 6.263 3350. 1.997 1220. 6.241 3355. 1.996 1225. 6.232 3360. 1.996 1230. 6.232 3365. 1.996 1235. 6.232 3370. 1.987 1240. 6.211 3375. 1.987 1245. 6.211 3380. 1.966 1250. 6.202 3385. 1.966 1255. 6.202 3390. 1.954 1260. 6.189 3395. 1.945 1265. 6.18 3400. 1.936 1270. 6.17 3405. 1.936 1275. 6.17 3410. 1.924 1280. 6.157 3415. 1.903 1285. 6.149 3420. 1.915 1290. 6.15 3425. 1.902 1295. 6.139 3430. 1.893 1300. 6.139 3435. 1.892 1305. 6.119 3440. 1.88 1310. 6.12 3445. 1.871 1315. 6.108 3450. 1.862 1320. 6.098 3455. 1.863 1325. 6.086 3460. 1.851 1330. 6.086 3465. 1.852 1335. 6.076 3470. 1.852 1340. 6.064 3475. 1.843 1345. 6.064 3480. 1.83 1350. 6.056 3485. 1.83 1355. 6.044 3490. 1.811 11 /21 /22 5 12:50:07 AQTESOLV for Windows Time (sec) Displacement (ft) Time sec) Displacement (ft) 1 36U. 6.036 3495. 1.82 1365. 6.037 3500. 1.811 1370. 6.016 3505. 1.811 1375. 6.029 3510. 1.799 1380. 6.017 3515. 1.799 1385. 6.009 3520. 1.79 1390. 5.997 3525. 1.777 1395. 5.988 3530. 1.79 1400. 5.989 3535. 1.769 1405. 5.98 3540. 1.77 1410. 5.979 3545. 1.77 1415. 5.958 3550. 1.762 1420. 5.966 3555. 1.751 1425. 5.957 3560. 1.751 1430. 5.935 3565. 1.742 1435. 5.935 3570. 1.73 1440. 5.929 3575. 1.721 1445. 5.917 3580. 1.72 1450. 5.916 3585. 1.708 1455. 5.916 3590. 1.708 1460. 5.895 3595. 1.699 1465. 5.895 3600. 1.691 1470. 5.895 3605. 1.701 1475. 5.886 3610. 1.692 1480. 5.874 3615. 1.681 1485. 5.874 3620. 1.682 1490. 5.856 3625. 1.682 1495. 5.856 3630. 1.683 1500. 5.856 3635. 1.674 1505. 5.835 3640. 1.674 1510. 5.822 3645. 1.654 1515. 5.822 3650. 1.654 1520. 5.813 3655. 1.653 1525. 5.805 3660. 1.643 1530. 5.805 3665. 1.642 1535. 5.793 3670. 1.629 1540. 5.793 3675. 1.619 1545. 5.785 3680. 1.627 1550. 5.773 3685. 1.618 1555. 5.773 3690. 1.606 1560. 5.763 3695. 1.606 1565. 5.751 3700. 1.596 1570. 5.751 3705. 1.596 1575. 5.742 3710. 1.596 1580. 5.732 3715. 1.576 1585. 5.72 3720. 1.576 1590. 5.732 3725. 1.576 1595. 5.719 3730. 1.582 1600. 5.698 3735. 1.568 1605. 5.697 3740. 1.568 1610. 5.688 3745. 1.571 1615. 5.679 3750. 1.562 1620. 5.673 3755. 1.55 1625. 5.667 3760. 1.55 1630. 5.667 3765. 1.55 1635. 5.658 3770. 1.541 1640. 5.658 3775. 1.54 1645. 5.646 3780. 1.539 1650. 5.636 3785. 1.526 1655. 5.637 3790. 1.525 1660. 5.638 3795. 1.515 1665. 5.627 3800. 1.514 1670. 5.622 3805. 1.515 1675. 5.622 3810. 1.507 1680. 5.612 3815. 1.517 1685. 5.6 3820. 1.509 11 /21 /22 6 12:50:07 AQTESOLV for Windows Time sec) Displacement (ft) Time sec) Displacement (ft) 1690. 5.599 3825. 1.498 1695. 5.599 3830. 1.511 1700. 5.59 3835. 1.499 1705. 5.577 3840. 1.49 1710. 5.568 3845. 1.49 1715. 5.568 3850. 1.49 1720. 5.558 3855. 1.478 1725. 5.543 3860. 1.469 1730. 5.534 3865. 1.468 1735. 5.533 3870. 1.468 1740. 5.533 3875. 1.467 1745. 5.515 3880. 1.457 1750. 5.514 3885. 1.457 1755. 5.514 3890. 1.456 1760. 5.492 3895. 1.443 1765. 5.484 3900. 1.434 1770. 5.484 3905. 1.434 1775. 5.473 3910. 1.434 1780. 5.465 3915. 1.433 1785. 5.453 3920. 1.421 1790. 5.454 3925. 1.412 1795. 5.454 3930. 1.422 1800. 5.444 3935. 1.414 1805. 5.443 3940. 1.403 1810. 5.434 3945. 1.403 1815. 5.412 3950. 1.395 1820. 5.408 3955. 1.395 1825. 5.397 3960. 1.395 1830. 5.391 3965. 1.396 1835. 5.377 3970. 1.375 1840. 5.368 3975. 1.387 1845. 5.36 3980. 1.376 1850. 5.349 3985. 1.375 1855. 5.349 3990. 1.374 1860. 5.339 3995. 1.374 1865. 5.327 4000. 1.373 1870. 5.327 4005. 1.363 1875. 5.327 4010. 1.351 1880. 5.317 4015. 1.35 1885. 5.305 4020. 1.349 1890. 5.306 4025. 1.339 1895. 5.297 4030. 1.339 1900. 5.276 4035. 1.338 1905. 5.276 4040. 1.337 1910. 5.268 4045. 1.332 1915. 5.267 4050. 1.333 1920. 5.254 4055. 1.325 1925. 5.236 4060. 1.326 1930. 5.244 4065. 1.328 1935. 5.234 4070. 1.329 1940. 5.222 4075. 1.307 1945. 5.222 4080. 1.307 1950. 5.222 4085. 1.306 1955. 5.202 4090. 1.317 1960. 5.193 4095. 1.304 1965. 5.193 4100. 1.295 1970. 5.194 4105. 1.304 1975. 5.182 4110. 1.284 1980. 5.173 4115. 1.285 1985. 5.164 4120. 1.285 1990. 5.164 4125. 1.277 1995. 5.164 4130. 1.278 2000. 5.143 4135. 1.277 2005. 5.143 4140. 1.277 2010. 5.143 4145. 1.277 2015. 5.132 4150. 1.276 11 /21 /22 7 12:50:07 AQTESOLV for Windows Time sec) Displacement (ft) Time sec) Displacement (ft) 2U2U. 5.123 415b. 1.26 / 2025. 5.123 4160. 1.266 2030. 5.114 4165. 1.267 2035. 5.103 4170. 1.267 2040. 5.094 4175. 1.255 2045. 5.097 4180. 1.268 2050. 5.098 4185. 1.256 2055. 5.077 4190. 1.257 2060. 5.078 4195. 1.256 2065. 5.057 4200. 1.255 2070. 5.069 4205. 1.246 2075. 5.057 4210. 1.245 2080. 5.049 4215. 1.232 2085. 5.037 4220. 1.232 2090. 5.028 4225. 1.223 2095. 5.028 4230. 1.232 2100. 5.019 4235. 1.232 2105. 5.006 4240. 1.224 2110. 4.997 4245. 1.215 2115. 4.985 4250. 1.224 2120. 4.976 4255. 1.215 2125. 4.975 4260. 1.215 2130. 4.966 4265. 1.214 2135. 4.953 4270. 1.223 SOLUTION Pumping Test Aquifer Model: Confined Solution Method: Theis (Step Test) VISUAL ESTIMATION RESULTS Estimated Parameters Parameter Estimate T 0.0002528 ft2/min S 0.07002 Sw 0. C 1. sec2/ft5 P 1.5 K = T/b = 4.213E-5 ft/min (2.14E-5 cm/sec) Ss = S/b = 0.01167 1/ft STEP TEST ANALYSIS RESULTS Jacob-Rorabaugh Step Test Model: s(t) = BQ + CQP t = 1.sec Q in cu.ft/sec B = 0. C=1. P = 1.5 Eden -Hazel Step Test Model: s(t) = (a + b Iog10(t))Q + CQP Q in cu.ft/sec a = -1.159E+5 b = 4.35E+4 C=1. P = 1.5 Well Efficiency: 0.% (Q from last step) 11 /21 /22 8 12:50:07 Hydrogeological Conceptual Site Model Update — Badin Business Park Attachment E 2022 Groundwater Elevation Measurements EHS Support LLC Attachment E 2022 Groundwater Elevation Data Hydrogeological Conceptual Site Model Update Alcoa Badin Works Badin, North Carolina Location North Carolina State Plane (NAD83) Area Screened Lithology Top of Casing Elevation (NAVD88 - ft) Depth of Well (ft) Screen Depth to Groundwater 9/8/2022 (ft) Depth to Groundwater 10/19/2022 (ft) Groundwater Elevation 9/8/2022 (NAVD88 - ft) Groundwater Elevation 10/19/2022 (NAVD88 - ft) Length (ft) Depth Elevation Top (ft) Bottom (ft) Top (NAVD88 - ft) Bottom (NAVD88 - ft) Northing Easting ABL-MW-1 604447.26 1665212.55 ABL PWR/Rock 541.46 45 10 35.00 45.00 506.46 496.46 27.96 28.88 513.50 512.58 ABL-MW-2 604044.58 1664817.44 ABL Soil/Saprolite 541.04 60 10 37.00 47.00 504.04 494.04 31.52 -- 509.52 -- ABL-MW-3 603645.35 1664413.84 ABL Soil/PWR 478.46 14 10 4.00 14.00 474.46 464.46 1.98 2.10 476.48 476.36 ABL-MW-6 604195.10 1665433.47 ABL PWR/Rock 538.03 35 10 25.00 35.00 513.03 503.03 31.00 30.02 507.03 508.01 ABL-PZ1D 604339.90 1665208.33 ABL PWR/Rock 538.96 60 10 46.00 56.00 492.96 482.96 29.25 29.59 509.71 509.37 ABL-PZ1I 604339.90 1665208.33 ABL PWR/Rock 538.84 60 10 30.00 40.00 508.84 498.84 25.34 26.14 513.50 512.70 ABL-PZ2D 603843.34 1665006.08 ABL PWR/Rock 542.88 70 10 60.00 70.00 482.88 472.88 57.85 53.80 485.03 489.08 ABL-PZ3D 603147.17 1664782.10 ABL PWR/Rock 469.82 50 10 40.00 50.00 429.82 419.82 -- 4.96 -- 464.86 ABL-PZ3I 603147.17 1664782.10 ABL PWR/Rock 469.81 21 5 16.00 21.00 453.81 448.81 -- 5.37 -- 464.44 BF-1 605488.59 1666711.88 Main Plant PWR/Rock 524.43 26 15 11.00 26.00 513.43 498.43 11.70 -- 512.73 -- BF-2 605882.38 1666762.39 Main Plant PWR/Rock 524.35 22 10 12.00 22.00 512.35 502.35 7.45 7.60 516.90 516.75 BF-5 605699.80 1666548.47 Main Plant PWR 523.03 19 10 9.00 19.00 514.03 504.03 9.98 10.08 513.05 512.95 MW-1 606259.54 1666644.83 Main Plant PWR 553.83 16 10 6.00 16.00 547.83 537.83 30.41 31.28 523.42 522.55 MW-10 606079.81 1667465.73 Main Plant PWR 530.11 32 10 21.00 31.00 509.11 499.11 20.92 21.83 509.19 508.28 MW-103 604590.93 1665804.52 Main Plant PWR 521.05 12 8 4.00 12.00 517.05 509.05 8.00 9.41 513.05 511.64 MW-104 604472.39 1666436.25 Main Plant Soil/PWR 520.36 18 10 8.00 18.00 512.36 502.36 11.11 12.61 509.25 507.75 MW-105 605349.07 1667456.16 Main Plant Soil/PWR 524.31 27 20 7.00 27.00 517.31 497.31 16.27 16.77 508.04 507.54 MW-108 606618.59 1667682.80 Main Plant PWR 516.61 27 20 7.00 27.00 509.61 489.61 8.32 8.81 508.29 507.80 MW-109 607422.52 1667293.03 Main Plant PWR 529.76 33 25 8.00 33.00 521.76 496.76 19.91 20.17 509.85 509.59 MW-110 607381.17 1667557.80 Main Plant Soil/Saprolite 511.34 15 10 5.00 15.00 506.34 496.34 2.89 3.35 508.45 507.99 MW-12 607176.82 1667080.19 Main Plant PWR 534.73 22 10 10.50 20.50 524.23 514.23 21.22 22.28 513.51 512.45 MW-13 606701.85 1666721.09 Main Plant PWR 548.02 34 10 23.00 33.00 525.02 515.02 26.97 27.14 521.05 520.88 MW-15 606319.01 1667010.68 Main Plant Saprolite/PWR 525.28 20 10 8.00 18.00 517.28 507.28 13.08 12.44 512.20 512.84 MW-16 607350.77 1667524.73 Main Plant PWR 519.31 18 10 7.50 17.50 511.81 501.81 10.83 11.35 508.48 507.96 MW-17 607009.17 1667614.88 Main Plant Saprolite/PWR 514.19 19 10 9.00 19.00 505.19 495.19 -- 6.84 -- 507.35 MW-18 607269.85 1666836.76 Main Plant PWR 553.51 43 10 33.00 43.00 520.51 510.51 -- 35.14 -- 518.37 MW-19 607642.38 1667054.87 Main Plant PWR 546.39 49 20 29.00 49.00 517.39 497.39 33.11 32.62 513.28 513.77 MW-2 606711.02 1666915.21 Main Plant Saprolite/PWR 537.75 25 10 15.00 25.00 522.75 512.75 21.52 21.53 516.23 516.22 MW-20A 606909.13 1666865.86 Main Plant PWR 544.01 40 10 29.00 39.00 515.01 505.01 24.14 24.35 519.87 519.66 MW-25A 606855.74 1667583.47 Main Plant PWR/Rock 514.07 44 10 34.00 44.00 480.07 470.07 -- 6.24 -- 507.83 MW-28 605925.15 1666188.54 Main Plant PWR 563.97 54 10 44.00 54.00 519.97 509.97 31.01 31.49 532.96 532.48 MW-29 606079.91 1666577.46 Main Plant PWR 557.38 44 10 34.00 44.00 523.38 513.38 28.35 29.58 529.03 527.80 MW-2A 606720.47 1666920.46 Main Plant PWR/Rock 537.68 47 10 37.00 47.00 500.68 490.68 21.95 21.82 515.73 515.86 MW-3 607091.91 1666868.05 Main Plant PWR 541.01 28 10 14.00 24.00 527.01 517.01 17.81 18.50 523.20 522.51 MW-32 605933.11 1666645.45 Main Plant PWR/Rock 528.00 20 10 10.00 20.00 518.00 508.00 9.21 9.07 518.79 518.93 MW-6A 606792.14 1667080.69 Main Plant PWR/Rock 524.17 53 5 48.00 53.00 476.17 471.17 8.70 8.55 515.47 515.62 MW-7 606354.88 1666409.71 Main Plant PWR 564.79 38 10 27.50 37.50 537.29 527.29 -- 31.91 -- 532.88 MW-8 607011.13 1667335.06 Main Plant PWR 522.08 24 10 13.50 23.50 508.58 498.58 12.62 13.75 509.46 508.33 MW-9 607277.50 1667378.87 Main Plant PWR 528.39 24 10 14.00 24.00 514.39 504.39 18.72 19.91 509.67 508.48 MW-200 607450.13 1667258.64 Main Plant Saprolite/PWR 533.11 41.5 10 31.5 41.5 501.61 491.61 22.95 23.01 510.16 510.10 MW-201 607025.48 1667544.53 Main Plant PWR 521.02 41.0 10 31.0 41.0 490.02 480.02 12.55 13.14 508.47 507.88 MW-202 606606.87 1667742.26 Main Plant PWR 515.63 42.0 10 32.0 42.0 483.63 473.63 7.10 7.58 508.53 508.05 MW-203 606114.16 1667729.12 Main Plant PWR 524.42 42.0 10 32.0 42.0 492.42 482.42 15.30 16.16 509.12 508.26 EHS e1,4 Support Page 1 of 2 Attachment E 2022 Groundwater Elevation Data Hydrogeological Conceptual Site Model Update Alcoa Badin Works Badin, North Carolina Location North Carolina State Plane (NAD83) Area Screened Lithology Top of Casing Elevation (NAVD88 - ft) Depth of Well (ft) Screen Depth to Groundwater 9/8/2022 (ft) Depth to Groundwater 10/19/2022 (ft) Groundwater Elevation 9/8/2022 (NAVD88 - ft) Groundwater Elevation 10/19/2022 (NAVD88 - ft) Length (ft) Depth Elevation Top (ft) Bottom (ft) Top (NAVD88 - ft) Bottom (NAVD88 - ft) Northing Easting MW-204 605752.38 1667637.74 Main Plant PWR 520.67 41.5 10 31.5 41.5 489.17 479.17 12.28 12.82 508.39 507.85 MW-205 605403.63 1667456.53 Main Plant PWR 523.85 31.0 10 21.0 31.0 502.85 492.85 15.74 16.29 508.11 507.56 MW-206 604969.97 1667700.33 Off -site PWR 511.87 35.0 10 25.0 35.0 486.87 476.87 3.75 4.10 508.12 507.77 MW-207 604561.78 1668227.00 Off -site PWR 512.34 15.0 5 10.0 15.0 502.34 497.34 4.22 4.61 508.12 507.73 MW-208 604588.71 1667230.57 Main Plant PWR 518.76 27.6 5 22.6 27.6 496.16 491.16 10.76 11.25 508.00 507.51 MW-209 604937.32 1666835.66 Main Plant PWR 524.74 52.0 10 42.0 52.0 482.74 472.74 12.85 14.70 511.89 510.04 MW-210 604088.89 1666650.73 Main Plant PWR 524.76 30.0 10 20.0 30.0 504.76 494.76 13.14 16.07 511.62 508.69 MW-211 604113.58 1665700.61 ABL PWR 525.18 30.0 5 25.0 30.0 500.18 495.18 20.70 20.65 504.48 504.53 MW-212 603626.95 1665868.12 ABL PWR 520.31 35.0 5 30.0 35.0 490.31 485.31 17.10 18.00 503.21 502.31 MW-213 602992.07 1666448.96 Off -site PWR 520.46 78.5 20 58.5 78.5 461.96 441.96 22.90 22.76 497.56 497.70 MW-214 602223.77 1667887.88 Off -site PWR 495.35 35.0 5 30.0 35.0 465.35 460.35 10.12 8.43 485.23 486.92 MW-215 604050.81 1664883.72 ABL PWR 532.70 40.0 5 35.0 40.0 497.70 492.70 27.60 27.84 505.10 504.86 MW-216 603327.28 1665460.95 ABL PWR 518.84 59.5 10 50.0 59.5 468.84 459.34 46.60 46.12 472.24 472.72 MW-217 606754.38 1667085.60 Main Plant PWR 524.82 25.0 5 20.0 25.0 504.82 499.82 10.55 10.45 514.27 514.37 MW-218 606108.94 1666305.64 Main Plant PWR 563.52 43.0 5 38.0 43.0 525.52 520.52 30.04 30.91 533.48 532.61 MW-219 606275.65 1666375.59 Main Plant PWR 565.80 40.0 5 35.0 40.0 530.80 525.80 32.19 33.13 533.61 532.67 MW-220 605193.28 1666134.67 Main Plant PWR 524.59 16.0 5 11.0 16.0 513.59 508.59 8.42 9.37 516.17 515.22 PZ-18RD 603200.77 1665127.62 ABL PWR 476.94 35.0 5 30.0 35.0 446.94 441.94 10.63 10.44 466.31 466.50 Notes: = not relevant ABL = Alcoa Badin Landfill ft = feet NAD83 = North American Datum of 1983 NAVD88 = North American Vertical Datum of 1988 PWR = partially weathered rock EHS 3 Support Page 2 of 2 Hydrogeological Conceptual Site Model Update — Badin Business Park Attachment F 2022 Field Parameter and Analytical Data EHS Support LLC LOW FLOW SAMPLING DATA SHEET Site: Badin Business Park Project No.: 300-226 Date: 8/18/2022 Civil & Environmental Consultants, Inc. Personnel: M. Worden Total Depth: 46.4 FT BTOC Depth to Top of Screen: 38-43 FT BGS Well Diameter (in.): 2 Date/Time of Pump Installation: 8/1/2022 Pump Type: Bladder Well #: MW-218 Static Water Level: 28.73 FT BTOC Pump Depth: 45 FT BTOC Water Level after Pump Installation: NR Time of Purge Initiation: 09:50 TIME FLOW RATE (mL/min( TURBIDITY (NTU) pH (S.U.) CI (mg/L) ORP (mV) Diss. Oxygen (mg/L) SP. COND. (mS/cm) Appeara nce TEMP. (°C) TDS (PPm) WATER LEVEL (BTOC) DRAW- DOWN (ft) MAX ALLOW. DD (ft) Other Field Measurements: Static water: 28.73' BTOC 26.0' Ground TD: 46.4' BTOC 9:50 Start 10:20 140 46.1 5.24 NA 214 7.25 0.058 NR 21.7 NA 31.90 NR NA 10:25 140 50.1 5.23 NA 216 8.31 0.058 NR 21.79 NA 32.14 NR NA Notes: Fill: 6.0 Discharge: 2.0 10:30 140 24.6 5.22 NA 217 8.63 0.058 NR 21.84 NA 32.39 NR NA 10:35 140 24.3 5.21 NA 218 8.72 0.058 NR 21.78 NA 32.51 NR NA 10:40 140 21.9 5.21 NA 215 8.81 0.058 NR 21.78 NA 32.70 NR NA 10:45 140 21.2 5.21 NA 220 8.86 0.058 NR 21.81 NA 32.75 NR NA Deviations from SAP: FIELD MEASUREMENTS AT TIME OF SAMPLE Date: 8/18/2022 Time: 10:45 Water Level: 32.75 FT BTOC pH (S.U.): 5.21 CI (mg/L): NA TDS (ppm): NA Spec. Cond. (mS/cm): 0.058 ORP (mV): 220 Diss. Oxygen (mg/L): 8.86 Turbidity (NTU): 140 Odor: None Volume Removed: 4200 mL Color/Appearance: Page 1 of 8 LOW FLOW SAMPLING DATA SHEET Site: Badin Business Park Project No.: 300-226 Date: 8/18/2022 Civil & Environmental Consultants, Inc. Personnel: M. Worden Total Depth: 42.6 FT BTOC Depth to Top of Screen: 35-40 FT BGS Well Diameter (in.): 2 Date/Time of Pump Installation: 8/18/2022 Pump Type: Bladder Well #: MW-219 Static Water Level: 31.85 FT BTOC Pump Depth: 39 FT BTOC Water Level after Pump Installation: NR Time of Purge Initiation: 11:20 TIME FLOW RATE (mL/min) TURBIDITY (NTU) pH (S.U.) CI (mg/L) ORP (mV) Diss. Oxygen (mg/L) SP. COND. (mS/cm) Appeara nce TEMP. (°C) TDS (PPm) WATER LEVEL (BTOC) DRAW- DOWN (ft) MAX ALLOW. DD (ft) Other Field Measurements: Static water 31.85' BTOC 28.05' Ground TD: 42.6' BTOC 11:20 Start 11:40 140 53.8 6.29 NA 140 7.25 0.139 NR 21.54 NA 32.80 NR NA 11:45 140 54.7 6.17 NA 144 6.30 0.141 NR 21.30 NA 33.01 NR NA Notes: Fill: 6.0 Discharge: 2.0 11:50 140 60.5 6.13 NA 146 5.67 0.141 NR 21.06 NA 33.22 NR NA 11:55 140 56.8 6.10 NA 149 6.05 0.140 NR 20.86 NA 33.35 NR NA 12:00 140 57.7 6.10 NA 150 5.97 0.138 NR 20.89 NA 33.42 NR NA 12:05 140 55.9 6.11 NA 151 6.00 0.138 NR 20.80 NA 33.46 NR NA Deviations from SAP: FIELD MEASUREMENTS AT TIME OF SAMPLE Date: 8/18/2022 Time: 12:05 Water Level: 33.46 FT BTOC pH (S.U.): 6.11 CI (mg/L): NA TDS (ppm): NA Spec. Cond. (mS/cm): 0.138 ORP (mV): 151 Diss. Oxygen (mg/L): 6.00 Turbidity (NTU): 55.9 Odor: None Volume Removed: 4200 mL Color/Appearance: Page 2 of 8 LOW FLOW SAMPLING DATA SHEET Site: Badin Business Park Project No.: 300-226 Date: 8/17/2022 Civil & Environmental Consultants, Inc. Personnel: M. Worden Total Depth: 77.5 FT BTOC Depth to Top of Screen: 60-80 FT BGS Well Diameter (in.): 2 Date/Time of Pump Installation: 8/17/2022 Pump Type: Bladder Well #: B-300 Static Water Level: 28.85 FT BTOC Pump Depth: 65 FT BTOC Water Level after Pump Installation: NR Time of Purge Initiation: 18:30 TIME FLOW RATE (mL/min) TURBIDITY (NTU) pH (S.U.) CI (mg/L) ORP (mV) Diss. Oxygen (mg/L) SP. COND. (mS/cm) Appeara nce TEMP. (°C) TDS (PPm) WATER LEVEL (BTOC) DRAW- DOWN (ft) MAX ALLOW. DD (ft) Other Field Measurements: Static water 28.85' BTOC 27.02' Ground TD: 77.5' BTOC 18:30 Start 18:40 90 355 5.22 NA 209 1.12 0.073 NR 21.10 NA 29.02 NR NA 18:45 140 294 5.06 NA 221 0.97 0.072 NR 20.46 NA 29.10 NR NA Notes: Fill: 6.0 Discharge: 2.0 18:50 140 260 5.04 NA 227 0.96 0.072 NR 20.16 NA 29.17 NR NA 18:55 140 246 5.02 NA 232 0.89 0.073 NR 19.91 NA 29.21 NR NA 19:00 140 200 5.00 NA 233 0.87 0.073 NR 19.87 NA 29.31 NR NA 19:05 140 218 5.03 NA 232 0.88 0.073 NR 19.91 NA 29.36 NR NA Deviations from SAP: FIELD MEASUREMENTS AT TIME OF SAMPLE Date: 8/17/2022 Time:19:10 Water Level: 29.36 FT BTOC pH (S.U.): 5.03 CI (mg/L): NA TDS (ppm): NA Spec. Cond. (mS/cm): 0.073 ORP (mV): 232 Diss. Oxygen (mg/L): 0.88 Turbidity (NTU): 218 Odor: none Volume Removed: 3950 mL Color/Appearance: Page 3 of 8 LOW FLOW SAMPLING DATA SHEET Site: Badin Business Park Project No.: 300-226 Date: 8/18/2022 Civil & Environmental Consultants, Inc. Personnel: M. Worden Total Depth: 37.25 FT BTOC Depth to Top of Screen: 30-35 FT BGS Well Diameter (in.): 1 Date/Time of Pump Installation: 8/18/2022 Pump Type: Bladder Well #: B-301 Static Water Level: 26.85 FT BTOC Pump Depth: 36 FT BTOC Water Level after Pump Installation: NR Time of Purge Initiation: 08:10 TIME FLOW RATE (mL/min) TURBIDITY (NTU) pH (S.U.) CI (mg/L) ORP (mV) Diss. Oxygen (mg/L) SP. COND. (mS/cm) Appeara nce TEMP. (°C) TDS (PPm) WATER LEVEL (BTOC) DRAW- DOWN (ft) MAX ALLOW. DD (ft) Other Field Measurements: Static water 26.83' BTOC 24.50' Ground TD: 37.25' BTOC 8:10 Sta t-Turbid Discharge 8:30 - 482 6.07 NA 197 3.58 0.123 NR 20.02 NA 27.95 NR NA 8:35 130 325 5.48 NA 199 3.02 0.117 NR 19.31 NA 28.02 NR NA Notes: Field calibrate U52 water quality meter Fill: 6.0 Discharge: 2.0 8:40 140 247 5.15 NA 203 2.85 0.113 NR 19.07 NA 28.08 NR NA 8:45 140 217 5.03 NA 209 2.88 0.111 NR 18.95 NA 28.08 NR NA 8:50 140 170 4.95 NA 217 3.03 0.110 NR 18.77 NA 28.16 NR NA 8:55 140 171 4.94 NA 217 3.07 0.109 NR 18.78 NA 28.19 NR NA 9:00 140 145 4.92 NA 220 3.11 0.109 NR 18.76 NA 28.22 NR NA Deviations from SAP: FIELD MEASUREMENTS AT TIME OF SAMPLE Date: 8/18/2022 Time: 09:05 Water Level: 28.22 FT BTOC pH (S.U.): 4.92 CI (mg/L): NA TDS (ppm): NA Spec. Cond. (mS/cm): 0.109 ORP (mV): 220 Diss. Oxygen (mg/L): 3.11 Turbidity (NTU): 145 Odor: None Volume Removed: 4150 mL Color/Appearance: Page 4 of 8 Site: Badin Business Park LOW FLOW SAMPLING DATA SHEET Project No.: 300-226 Date: 8/17/2022 Civil & Environmental Consultants, Inc. Personnel: M. Worden/C. Ziegler Total Depth: 41.0 FT BTOC Depth to Top of Screen: 35-40 FT BGS Well Diameter (in.): 1 Date/Time of Pump Installation: 8/17/2022 Pump Type: Bladder Well #: B-302 Static Water Level: 31.42 FT BTOC Pump Depth: 35 FT BTOC Water Level after Pump Installation: NR Time of Purge Initiation: 17:11 TIME FLOW RATE (mL/min) TURBIDITY (NTU) pH (S.U.) CI (mg/L) ORP (mV) Diss. Oxygen (mg/L) SP. COND. (mS/cm) Appeara nce TEMP. (°C) TDS (ppm) WATER LEVEL (BTOC) DRAW- DOWN (ft) MAX ALLOW. DD (ft) Other Field Measurements: Static water 31.42' BTOC 30.3' Ground TD: 41.0' BTOC 17:11 Start 17:25 120 288 5.11 NA 187 1.81 0.101 NR 21.35 NA 31.50 NR NA 17:30 80 153 5.04 NA 201 2.48 0.097 NR 21.05 NA 31.50 NR NA Notes: 17:35 100 86.7 5.00 NA 214 2.46 0.094 NR 20.60 NA 31.50 NR NA 17:40 90 53.6 4.98 NA 221 3.35 0.092 NR 20.57 NA 31.50 NR NA 17:45 100 26.0 4.96 NA 229 3.00 0.091 NR 20.58 NA 31.50 NR NA 17:50 100 14.3 4.91 NA 237 3.42 0.089 NR 20.35 NA 31.50 NR NA 17:55 100 7.1 4.91 NA 242 3.85 0.087 NR 20.40 NA 31.50 NR NA 18:00 100 5.5 4.90 NA 246 4.03 0.087 NR 20.46 NA 31.50 NR NA Deviations from SAP: FIELD MEASUREMENTS AT TIME OF SAMPLE Date:8/17/2022 Time: 18:00 Water Level: 31.50 FT BTOC pH (S.U.): 4.90 CI (mg/L): NA TDS (ppm): NA Spec. Cond. (mS/cm): 0.087 ORP (mV): 246 Diss. Oxygen (mg/L): 4.03 Turbidity (NTU): 5.5 Odor: None Volume Removed: 3950 mL Color/Appearance: Page 5 of 8 Site: Badin Business Park LOW FLOW SAMPLING DATA SHEET Project No.: 300-226 Date: 8/17/2022 Civil & Environmental Consultants, Inc. Personnel: M. Worden/C. Ziegler Total Depth: 43.3 FT BTOC Depth to Top of Screen: 35-40 FT BGS Well Diameter (in.): 2 Date/Time of Pump Installation: 8/17/2022 Pump Type: Bladder Well #: B-303 Static Water Level: 30.43 FT BTOC Pump Depth: 40' BTOC Water Level after Pump Installation: NR Time of Purge Initiation: 15:50 TIME FLOW RATE (mL/min) TURBIDITY (NTU) pH (S.U.) CI (mg/L) ORP (mV) Diss. Oxygen (mg/L) SP. COND. (mS/cm) Appeara nce TEMP. (°C) TDS (ppm) WATER LEVEL (BTOC) DRAW- DOWN (ft) MAX ALLOW. DD (ft) Other Field Measurements: Static water: 30.43 ' BTOC 27 9' Ground TD: 43.3' BTOC 15:50 Start 16:05 120 46.8 5.34 NA 178 4.77 0.058 NR 21.73 NA 30.60 NR NA 16:10 50 27.3 5.26 NA 184 4.64 0.059 NR 20.89 NA 30.86 NR NA Notes: 16:15 80 28.2 5.25 NA 191 4.64 0.059 NR 20.38 NA 30.89 NR NA 16:20 60 2.7 5.25 NA 195 4.30 0.059 NR 20.15 NA 30.89 NR NA 16:25 60 0.0 5.23 NA 199 4.25 0.059 NR 20.29 NA 30.89 NR NA 16:30 80 0.0 5.23 NA 204 4.40 0.059 NR 20.21 NA 30.89 NR NA 16:35 60 0.0 5.23 NA 208 4.50 0.059 NR 20.13 NA 30.91 NR NA Deviations from SAP: FIELD MEASUREMENTS AT TIME OF SAMPLE Date: 8/17/2022 Time: 16:35 Water Level: 30.90 FT BTOC pH (S.U.): 5.23 CI (mg/L): NA TDS (ppm): NA Spec. Cond. (mS/cm): 0.059 ORP (mV): 208 Diss. Oxygen (mg/L): 4.50 Turbidity (NTU): 0 Odor: None Volume Removed: 2550 mL Color/Appearance: Page 6 of 8 Site: Badin Business Park LOW FLOW SAMPLING DATA SHEET Project No.: 300-226 Date: 8/17/2022 Civil & Environmental Consultants, Inc. Personnel: M. Worden/C. Ziegler Total Depth: 37.1 FT BTOC Depth to Top of Screen: 33-38 FT BGS Well Diameter (in.): 2 Date/Time of Pump Installation: 8/17/2022 Pump Type: Bladder Well #: B-304 Static Water Level: 24.92 FT BTOC Pump Depth: 35 FT BTOC Water Level after Pump Installation: NR Time of Purge Initiation: 14:00 TIME FLOW RATE (mL/min) TURBIDITY (NTU) pH (S.U.) CI (mg/L) ORP (mV) Diss. Oxygen (mg/L) SP. COND. (mS/cm) Appeara nce TEMP. (°C) TDS (ppm) WATER LEVEL (BTOC) DRAW- DOWN (ft) MAX ALLOW. DD (ft) Other Field Measurements: Static water 24.92' BTOC 23.6' Ground TD: 37.1' BTOC 14:00 Start 14:20 100 615 6.68 NA 120 0.35 0.221 NR 22.19 NA 25.25 NR NA 14:25 90 693 6.58 NA 112 0.37 0.208 NR 21.90 NA 25.26 NR NA Notes: 14:30 90 847 6.46 NA 101 0.43 0.201 NR 21.62 NA 25.26 NR NA 14:35 100 882 6.36 NA 91 0.53 0.197 NR 21.39 NA 25.26 NR NA 14:40 90 863 6.29 NA 85 1.16 0.195 NR 21.22 NA 25.26 NR NA 14:45 100 810 6.26 NA 82 2.40 0.198 NR 21.10 NA 25.26 NR NA 14:50 100 765 6.28 NA 81 3.08 0.199 NR 21.08 NA 25.26 NR NA 14:55 100 636 6.30 NA 82 3.33 0.197 NR 20.98 NA 25.26 NR NA H 15:00 100 517 6.30 NA 81 3.19 0.195 NR 21.03 NA 25.26 NR NA 15:05 110 425 6.29 NA 81 3.00 0.191 NR 21.03 NA 25.26 NR NA Deviations from SAP: FIELD MEASUREMENTS AT TIME OF SAMPLE Date: 8/17/2022 Time: 15:10 Water Level: 25.26 FT BTOC pH (S.U.): 6.29 CI (mg/L): NA TDS (ppm): NA Spec. Cond. (mS/cm): 0.191 ORP (mV): 81 Diss. Oxygen (mg/L): 3.00 Turbidity (NTU): 425 Odor: None noted Volume Removed: 4900 mL Color/Appearance: Page 7 of 8 LOW FLOW SAMPLING DATA SHEET Site: Badin Business Park Project No.: 300-226 Date: 8/17/2022 Civil & Environmental Consultants, Inc. Personnel: M. Worden/C. Ziegler Total Depth: 41.85 FT BTOC Depth to Top of Screen: 35-40 FT BGS Well Diameter (in.): 1 Date/Time of Pump Installation: 8/17/2022 Pump Type: Bladder Well #: B-305 Static Water Level: 29.70 FT BTOC Pump Depth: 40 FT BTOC Water Level after Pump Installation: NR Time of Purge Initiation: 11:50 TIME FLOW RATE (mL/min 1 TURBIDITY (NTU) pH (S.U.) CI (mg/L) ORP (mV) Diss. Oxygen (mg/L) SP. COND. (µS/cm) Appeara nce TEMP. (°C) TDS (ppm) WATER LEVEL (BTOC) DRAW- DOWN (ft) MAX ALLOW. DD (ft) Other Field Measurements: Static water: 29.7 BTOC Ground: N/A 11:50 Start- Turbid 12:10 0 >1000 NR NA NR NR NR NR NR NA NR NR NA 12:15 60 899 8.30 NA 168 7.60 0.051 NR 23.70 NA 30.38 NR NA Notes: Fill: 10->6.0 Discharge: 5 -> 2.0 12:20 20 778 5.02 NA 182 7.43 0.048 NR 22.90 NA 30.34 NR NA 12:25 15 763 4.94 NA 190 7.48 0.048 NR 22.61 NA 30.35 NR NA 12:30 40 641 4.90 NA 200 8.57 0.047 NR 22.06 NA 30.65 NR NA 12:35 70 685 4.85 NA 210 8.23 0.046 NR 21.54 NA 30.65 NR NA 12:40 60 605 4.80 NA 219 7.93 0.046 NR 21.36 NA 30.67 NR NA 12:45 50 468 4.78 NA 223 7.85 0.046 NR 21.42 NA 30.71 NR NA 12:50 50 428 4.75 NA 229 7.71 0.046 NR 21.41 NA 30.70 NR NA 12:55 70 341 4.74 NA 234 7.74 0.046 NR 21.37 NA 30.77 NR NA Deviations from SAP: 13:00 80 305 4.71 NA 239 7.77 0.046 NR 21.01 NA 30.95 NR NA 13:05 80 347 4.68 NA 245 7.73 0.046 NR 20.81 NA 30.98 NR NA 13:10 80 266 4.67 NA 249 7.75 0.045 NR 20.74 NA 30.92 NR NA 13:15 NM 253 4.67 NA 251 7.71 0.045 NR 20.69 NA 30.94 NR NA FIELD MEASUREMENTS AT TIME OF SAMPLE Date: 8/17/2022 Time: 13:20 Water Level: 30.94 FT BTOC pH (S.U.): 4.67 CI (mg/L): NA TDS (ppm): NA Spec. Cond. (mS/cm): 0.045 ORP (mV): 251 Diss. Oxygen (mg/L): 7.71 Turbidity (NTU): 253 Odor: None noted Volume Removed: 3775 mL Color/Appearance: Page 8 of 8 LINKS Review your project results through A F •� E O L Have a Question? ' Ask /The Ex ert LVisit us at: wwweu rofi nsu s. com/E nv eurofins Environment Testing America ANALYTICAL REPORT Eurofins Savannah 5102 LaRoche Avenue Savannah, GA 31404 Tel: (912)354-7858 Laboratory Job ID: 680-219919-1 Client Project/Site: Alcoa - Badin NC (GW) For: Civil & Environmental Consultants Inc 2704 Cherokee Farm Way Suite 101 Knoxville, Tennessee 37920 Attn: Michael Worden )6 Authorized for release by: 8/29/2022 3:08:34 PM Sheila Hoffman, Project Manager II (912)250-0279 Sheila.Hoffman@et.eurofinsus.com The test results in this report meet all 2003 NELAC, 2009 TNI, and 2016 TNI requirements for accredited parameters, exceptions are noted in this report. This report may not be reproduced except in full, and with written approval from the laboratory. For questions please contact the Project Manager at the e-mail address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature. Results relate only to the items tested and the sample(s) as received by the laboratory. Method Summary Client: Civil & Environmental Consultants Inc Job ID: 680-219919-1 Project/Site: Alcoa - Badin NC (GW) Method Method Description Protocol Laboratory 300.0-1993 R2.1 Anions, Ion Chromatography MCAWW EET SAV D7511-12 Total Cyanide ASTM ELLE OIA-1677 Cyanide, Available (Flow Injection) 01 CORP EET PIT OIA-1677 Cyanide, Free (Flow Injection) 01 CORP EET PIT Protocol References: ASTM = ASTM International MCAWW = "Methods For Chemical Analysis Of Water And Wastes", EPA-600/4-79-020, March 1983 And Subsequent Revisions. 01 CORP = 01 Corporation Instrument Manual. Laboratory References: EET PIT = Eurofins Pittsburgh, 301 Alpha Drive, RIDC Park, Pittsburgh, PA 15238, TEL (412)963-7058 EET SAV = Eurofins Savannah, 5102 LaRoche Avenue, Savannah, GA 31404, TEL (912)354-7858 ELLE = Eurofins Lancaster Laboratories Environment Testing, LLC, 2425 New Holland Pike, Lancaster, PA 17601, TEL (717)656-2300 Eurofins Savannah Page 2 of 23 8/29/2022 Sample Summary Client: Civil & Environmental Consultants Inc Job ID: 680-219919-1 Project/Site: Alcoa - Badin NC (GW) Lab Sample ID Client Sample ID Matrix Collected Received 680-219919-1 B300 Water 08/17/22 19:10 08/19/22 09:30 680-219919-2 B301 Water 08/18/22 09:05 08/19/22 09:30 680-219919-3 B302 Water 08/17/22 18:00 08/19/22 09:30 680-219919-4 B303 Water 08/17/22 16:35 08/19/22 09:30 680-219919-5 B304 Water 08/17/22 15:10 08/19/22 09:30 680-219919-6 B305 Water 08/17/22 13:20 08/19/22 09:30 680-219919-7 MW 219 Water 08/18/22 12:05 08/19/22 09:30 680-219919-8 MW218 Water 08/18/22 10:45 08/19/22 09:30 Eurofins Savannah Page 3 of 23 8/29/2022 Definitions/Glossary Client: Civil & Environmental Consultants Inc Job ID: 680-219919-1 Project/Site: Alcoa - Badin NC (GW) Qualifiers HPLC/IC Qualifier Qualifier Description J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. General Chemistry Qualifier Qualifier Description F1 J MS and/or MSD recovery exceeds control limits. Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. Glossary Abbreviation These commonly used abbreviations may or may not be present in this report. Listed under the "D" column to designate that the result is reported on a dry weight basis %R Percent Recovery CFL Contains Free Liquid CFU Colony Forming Unit CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) Dil Fac Dilution Factor DL Detection Limit (DoD/DOE) DL, RA, RE, IN Indicates a Dilution, Re -analysis, Re -extraction, or additional Initial metals/anion analysis of the sample DLC Decision Level Concentration (Radiochemistry) EDL Estimated Detection Limit (Dioxin) LOD Limit of Detection (DoD/DOE) LOQ Limit of Quantitation (DoD/DOE) MCL EPA recommended "Maximum Contaminant Level" MDA Minimum Detectable Activity (Radiochemistry) MDC Minimum Detectable Concentration (Radiochemistry) MDL Method Detection Limit ML Minimum Level (Dioxin) MPN Most Probable Number MQL Method Quantitation Limit NC Not Calculated ND Not Detected at the reporting limit (or MDL or EDL if shown) NEG Negative / Absent POS Positive / Present PQL Practical Quantitation Limit PRES Presumptive QC Quality Control RER Relative Error Ratio (Radiochemistry) RL Reporting Limit or Requested Limit (Radiochemistry) RPD Relative Percent Difference, a measure of the relative difference between two points TEF Toxicity Equivalent Factor (Dioxin) TEQ Toxicity Equivalent Quotient (Dioxin) TNTC Too Numerous To Count Eurofins Savannah Page 4 of 23 8/29/2022 Case Narrative Client: Civil & Environmental Consultants Inc Job ID: 680-219919-1 Project/Site: Alcoa - Badin NC (GW) Job ID: 680-219919-1 Laboratory: Eurofins Savannah Narrative Job Narrative 680-219919-1 Receipt The samples were received on 8/19/2022 9:30 AM. Unless otherwise noted below, the samples arrived in good condition, and, where required, properly preserved and on ice. The temperatures of the 2 coolers at receipt time were 2.0°C and 2.9°C HPLC/IC No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page. General Chemistry Method 1677_Free: The matrix spike / matrix spike duplicate (MS/MSD) recoveries for analytical batch 180-410147 were outside control limits. Sample matrix interference and/or non -homogeneity are suspected because the associated laboratory control sample (LCS) recovery was within acceptance limits. No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page. Eurofins Savannah Page 5 of 23 8/29/2022 Client Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-219919-1 Project/Site: Alcoa - Badin NC (GW) Client Sample ID: B300 Date Collected: 08/17/22 19:10 Date Received: 08/19/22 09:30 Lab Sample ID: 680-219919-1 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Fluoride <0.040 0.10 0.040 mg/L 08/24/22 18:21 1 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total Cyanide, Available Cyanide, Free <0.0020 0.0043 <0.00079 F1 0.0060 0.0020 mg/L 08/23/22 07:58 1 0.0020 0.0016 mg/L 08/27/22 10:51 1 0.0020 0.00079 mg/L 08/26/22 12:02 1 Client Sample ID: B301 Date Collected: 08/18/22 09:05 Date Received: 08/19/22 09:30 Lab Sample ID: 680-219919-2 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Fluoride 0.042 J 0.10 0.040 mg/L 08/24/22 18:34 1 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total <0.0020 0.0060 0.0020 mg/L 08/23/22 08:05 1 Cyanide, Available <0.0016 0.0020 0.0016 mg/L 08/27/22 11:01 1 Cyanide, Free 0.00080 J 0.0020 0.00079 mg/L 08/26/22 12:07 1 Client Sample ID: B302 Date Collected: 08/17/22 18:00 Date Received: 08/19/22 09:30 Lab Sample ID: 680-219919-3 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Fluoride <0.040 0.10 0.040 mg/L 08/24/22 18:46 1 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total <0.0020 0.0060 0.0020 mg/L 08/23/22 08:07 1 Cyanide, Available <0.0016 0.0020 0.0016 mg/L 08/27/22 10:55 1 Cyanide, Free <0.00079 0.0020 0.00079 mg/L 08/26/22 12:14 1 Client Sample ID: B303 Date Collected: 08/17/22 16:35 Date Received: 08/19/22 09:30 Lab Sample ID: 680-219919-4 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Fluoride <0.040 0.10 0.040 mg/L 08/24/22 18:59 1 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total <0.0020 0.0060 0.0020 mg/L 08/23/22 08:09 1 Cyanide, Available <0.0016 0.0020 0.0016 mg/L 08/27/22 10:57 1 Cyanide, Free <0.00079 0.0020 0.00079 mg/L 08/26/22 12:16 1 Eurofins Savannah Page 6 of 23 8/29/2022 Client Sample Results Client: Civil & Environmental Consultants Inc Project/Site: Alcoa - Badin NC (GW) Client Sample ID: B304 Date Collected: 08/17/22 15:10 Date Received: 08/19/22 09:30 Job ID: 680-219919-1 Lab Sample ID: 680-219919-5 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit Fluoride General Chemistry Analyte 0.17 Result Qualifier 0.10 RL 0.040 mg/L MDL Unit D Prepared Analyzed Dil Fac D Prepared Cyanide, Total Cyanide, Available Cyanide, Free <0.0020 <0.0016 <0.00079 0.0060 0.0020 0.0020 0.0020 mg/L 0.0016 mg/L 0.00079 mg/L 08/24/22 19:12 1 Analyzed Dil Fac 08/23/22 08:11 1 08/27/22 10:58 1 08/26/22 12:17 1 Client Sample ID: B305 Date Collected: 08/17/22 13:20 Date Received: 08/19/22 09:30 Lab Sample ID: 680-219919-6 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Fluoride General Chemistry Analyte <0.040 Result Qualifier 0.10 RL 0.040 mg/L MDL Unit D Prepared Cyanide, Total Cyanide, Available Cyanide, Free <0.0020 <0.0016 <0.00079 0.0060 0.0020 0.0020 0.0020 mg/L 0.0016 mg/L 0.00079 mg/L 08/24/22 20:53 1 Analyzed Dil Fac 08/23/22 08:14 1 08/27/22 11:00 1 08/26/22 12:19 1 Client Sample ID: MW 219 Date Collected: 08/18/22 12:05 Date Received: 08/19/22 09:30 Lab Sample ID: 680-219919-7 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Fluoride General Chemistry Analyte 0.075 J Result Qualifier 0.10 RL 0.040 mg/L MDL Unit Cyanide, Total Cyanide, Available Cyanide, Free <0.0020 <0.0016 <0.00079 0.0060 0.0020 0.0020 0.0020 mg/L 0.0016 mg/L 0.00079 mg/L D Prepared 08/24/22 21:05 1 Analyzed Dil Fac 08/23/22 08:16 1 08/27/22 11:10 1 08/26/22 12:20 1 Client Sample ID: MW218 Date Collected: 08/18/22 10:45 Date Received: 08/19/22 09:30 Lab Sample ID: 680-219919-8 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Analyte Chromatography Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Fluoride General Chemistry Analyte <0.040 Result Qualifier 0.10 RL 0.040 mg/L MDL Unit Cyanide, Total Cyanide, Available Cyanide, Free <0.0020 <0.0016 0.00089 J 0.0060 0.0020 0.0020 0.0020 mg/L 0.0016 mg/L 0.00079 mg/L D Prepared 08/24/22 21:18 1 Analyzed Dil Fac 08/23/22 08:18 1 08/27/22 11:12 1 08/26/22 12:22 1 Eurofins Savannah Page 7 of 23 8/29/2022 QC Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-219919-1 Project/Site: Alcoa - Badin NC (GW) Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Lab Sample ID: MB 680-737344/2 Matrix: Water Analysis Batch: 737344 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Fluoride <0.040 0.10 0.040 mg/L 08/24/22 10:33 1 Lab Sample ID: LCS 680-737344/3 Matrix: Water Analysis Batch: 737344 Analyte Client Sample ID: Lab Control Sample E Prep Type: Total/NA Spike LCS LCS %Rec Added Result Qualifier Unit D %Rec Limits Fluoride Lab Sample ID: LCSD 680-737344/4 Matrix: Water Analysis Batch: 737344 Analyte 2.00 1.94 mg/L 97 90 - 110 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Spike LCSD LCSD %Rec RPD Added Result Qualifier Unit D %Rec Limits RPD Limit Fluoride 2.00 1.95 mg/L 97 90 - 110 0 15 Lab Sample ID: MB 680-737345/41 Matrix: Water Analysis Batch: 737345 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Fluoride <0.040 0.10 0.040 mg/L 08/24/22 19:37 1 Lab Sample ID: LCS 680-737345/72 Matrix: Water Analysis Batch: 737345 Analyte Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec Added Result Qualifier Unit D %Rec Limits Fluoride Lab Sample ID: LCSD 680-737345/73 Matrix: Water Analysis Batch: 737345 Analyte 2.00 1.97 mg/L 99 90 _ 110 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Spike LCSD LCSD %Rec RPD Added Result Qualifier Unit D %Rec Limits RPD Limit Fluoride 2.00 1.97 mg/L 98 90 _ 110 0 15 Method: D7511-12 - Total Cyanide Lab Sample ID: MB 410-288713/18 Matrix: Water Analysis Batch: 288713 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total <0.0020 0.0060 0.0020 mg/L 08/23/22 07:52 1 Eurofins Savannah Page 8 of 23 8/29/2022 QC Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-219919-1 Project/Site: Alcoa - Badin NC (GW) Method: D7511-12 - Total Cyanide (Continued) Lab Sample ID: LCS 410-288713/16 Matrix: Water Analysis Batch: 288713 Analyte Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec Added Result Qualifier Unit D %Rec Limits Cyanide, Total Lab Sample ID: 680-219919-1 MS Matrix: Water Analysis Batch: 288713 Analyte 0.0500 0.0550 mg/L 110 84 _ 116 Client Sample ID: B300 E Prep Type: Total/NA Sample Sample Spike MS MS %Rec Result Qualifier Added Result Qualifier Unit D %Rec Limits Cyanide, Total <0.0020 0.0500 0.0429 mg/L 86 84 _ 116 Lab Sample ID: 680-219919-1 DU Matrix: Water Analysis Batch: 288713 Analyte Client Sample ID: B300 Prep Type: Total/NA Sample Sample DU DU RPD Result Qualifier Result Qualifier Unit D RPD Limit Cyanide, Total <0.0020 <0.0020 mg/L NC 20 Method: OIA-1677 - Cyanide, Free (Flow Injection) Lab Sample ID: MB 180-410147/42 Matrix: Water Analysis Batch: 410147 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Free <0.00079 0.0020 0.00079 mg/L 08/26/22 11:59 1 Lab Sample ID: LCS 180-410147/43 Matrix: Water Analysis Batch: 410147 Analyte Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec Added Result Qualifier Unit D %Rec Limits Cyanide, Free Lab Sample ID: 680-219919-1 MS Matrix: Water Analysis Batch: 410147 Analyte 0.0500 0.0535 mg/L 107 82 - 132 Client Sample ID: B300 Prep Type: Total/NA Sample Sample Spike MS MS %Rec Result Qualifier Added Result Qualifier Unit D %Rec Limits Cyanide, Free <0.00079 F1 Lab Sample ID: 680-219919-1 MSD Matrix: Water Analysis Batch: 410147 Analyte 0.0500 0.0688 F1 mg/L 138 82 - 130 Client Sample ID: B300 Prep Type: Total/NA Sample Sample Spike MSD MSD %Rec RPD Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Cyanide, Free <0.00079 F1 0.0500 0.0697 F1 mg/L 139 82 _ 130 1 11 Eurofins Savannah Page 9 of 23 8/29/2022 QC Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-219919-1 Project/Site: Alcoa - Badin NC (GW) Method: OIA-1677 - Cyanide, Available (Flow Injection) Lab Sample ID: MB 180-410229/22 Matrix: Water Analysis Batch: 410229 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Available <0.0016 Lab Sample ID: LCS 180-410229/23 Matrix: Water Analysis Batch: 410229 Analyte 0.0020 0.0016 mg/L 08/27/22 10:48 1 Client Sample ID: Lab Control Sample E Prep Type: Total/NA Spike LCS LCS %Rec Added Result Qualifier Unit D %Rec Limits Cyanide, Available Lab Sample ID: 680-219919-1 MS Matrix: Water Analysis Batch: 410229 Analyte 0.0501 0.0529 mg/L 106 82 _ 132 Client Sample ID: B300 Prep Type: Total/NA Sample Sample Spike MS MS %Rec Result Qualifier Added Result Qualifier Unit D %Rec Limits Cyanide, Available 0.0043 Lab Sample ID: 680-219919-1 MSD Matrix: Water Analysis Batch: 410229 Analyte 0.0501 0.0606 mg/L 113 82 - 130 Client Sample ID: B300 Prep Type: Total/NA Sample Sample Spike MSD MSD %Rec RPD Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Cyanide, Available 0.0043 0.0501 0.0616 mg/L 115 82 - 130 2 11 Eurofins Savannah Page 10 of 23 8/29/2022 QC Association Summary Client: Civil & Environmental Consultants Inc Job ID: 680-219919-1 Project/Site: Alcoa - Badin NC (GW) HPLC/IC Analysis Batch: 737344 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 680-219919-1 B300 680-219919-2 B301 680-219919-3 B302 680-219919-4 B303 680-219919-5 B304 MB 680-737344/2 Method Blank LCS 680-737344/3 Lab Control Sample LCSD 680-737344/4 Lab Control Sample Dup Analysis Batch: 737345 Lab Sample ID Client Sample ID Total/NA Water 300.0-1993 R2.1 Total/NA Water 300.0-1993 R2.1 Total/NA Water 300.0-1993 R2.1 Total/NA Water 300.0-1993 R2.1 Total/NA Water 300.0-1993 R2.1 Total/NA Water 300.0-1993 R2.1 Total/NA Water 300.0-1993 R2.1 Total/NA Water 300.0-1993 R2.1 Prep Type Matrix Method Prep Batch 680-219919-6 B305 680-219919-7 MW 219 680-219919-8 MW218 MB 680-737345/41 Method Blank LCS 680-737345/72 Lab Control Sample LCSD 680-737345/73 Lab Control Sample Dup Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Water Water Water Water Water Water 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 General Chemistry Analysis Batch: 288713 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 680-219919-1 B300 Total/NA Water D7511-12 680-219919-2 B301 Total/NA Water D7511-12 680-219919-3 B302 Total/NA Water D7511-12 680-219919-4 B303 Total/NA Water D7511-12 680-219919-5 B304 Total/NA Water D7511-12 680-219919-6 B305 Total/NA Water D7511-12 680-219919-7 MW 219 Total/NA Water D7511-12 680-219919-8 MW218 Total/NA Water D7511-12 MB 410-288713/18 Method Blank Total/NA Water D7511-12 LCS 410-288713/16 Lab Control Sample Total/NA Water D7511-12 680-219919-1 MS B300 Total/NA Water D7511-12 680-219919-1 DU B300 Total/NA Water D7511-12 Analysis Batch: 410147 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 680-219919-1 B300 Total/NA Water OIA-1677 680-219919-2 B301 Total/NA Water OIA-1677 680-219919-3 B302 Total/NA Water OIA-1677 680-219919-4 B303 Total/NA Water OIA-1677 680-219919-5 B304 Total/NA Water OIA-1677 680-219919-6 B305 Total/NA Water OIA-1677 680-219919-7 MW 219 Total/NA Water OIA-1677 680-219919-8 MW218 Total/NA Water OIA-1677 MB 180-410147/42 Method Blank Total/NA Water OIA-1677 LCS 180-410147/43 Lab Control Sample Total/NA Water OIA-1677 680-219919-1 MS B300 Total/NA Water OIA-1677 680-219919-1 MSD B300 Total/NA Water OIA-1677 Eurofins Savannah Page 11 of 23 8/29/2022 QC Association Summary Client: Civil & Environmental Consultants Inc Job ID: 680-219919-1 Project/Site: Alcoa - Badin NC (GW) General Chemistry Analysis Batch: 410229 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 680-219919-1 B300 Total/NA Water OIA-1677 680-219919-2 B301 Total/NA Water OIA-1677 680-219919-3 B302 Total/NA Water OIA-1677 680-219919-4 B303 Total/NA Water OIA-1677 680-219919-5 B304 Total/NA Water OIA-1677 680-219919-6 B305 Total/NA Water OIA-1677 680-219919-7 MW 219 Total/NA Water OIA-1677 680-219919-8 MW218 Total/NA Water OIA-1677 MB 180-410229/22 Method Blank Total/NA Water OIA-1677 LCS 180-410229/23 Lab Control Sample Total/NA Water OIA-1677 680-219919-1 MS B300 Total/NA Water OIA-1677 680-219919-1 MSD B300 Total/NA Water OIA-1677 Eurofins Savannah Page 12 of 23 8/29/2022 Lab Chronicle Client: Civil & Environmental Consultants Inc Job ID: 680-219919-1 Project/Site: Alcoa - Badin NC (GW) Client Sample ID: B300 Date Collected: 08/17/22 19:10 Date Received: 08/19/22 09:30 Lab Sample ID: 680-219919-1 Matrix: Water Prep Type Batch Batch Type Method Run Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Total/NA Total/NA Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 737344 08/24/22 18:21 AF EET SAV Instrument ID: CICK Analysis D7511-12 1 288713 08/23/22 07:58 CBM8 ELLE Instrument ID: 19369 Analysis OIA-1677 1 410147 08/26/22 12:02 SNR EET PIT Instrument ID: ALPKEM3 Analysis OIA-1677 1 410229 08/27/22 10:51 SNR EET PIT Instrument ID: ALPKEM3 Client Sample ID: B301 Date Collected: 08/18/22 09:05 Date Received: 08/19/22 09:30 Lab Sample ID: 680-219919-2 Matrix: Water Prep Type Batch Batch Type Method Run Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 737344 08/24/22 18:34 AF EET SAV Instrument ID: CICK Total/NA Analysis D7511-12 1 288713 08/23/22 08:05 CBM8 ELLE Instrument ID: 19369 Total/NA Analysis OIA-1677 1 410147 08/26/22 12:07 SNR EET PIT Instrument ID: ALPKEM3 Total/NA Analysis OIA-1677 1 410229 08/27/22 11:01 SNR EET PIT Instrument ID: ALPKEM3 Client Sample ID: B302 Date Collected: 08/17/22 18:00 Date Received: 08/19/22 09:30 Lab Sample ID: 680-219919-3 Matrix: Water Prep Type Batch Batch Type Method Run Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 737344 08/24/22 18:46 AF EET SAV Instrument ID: LICK Total/NA Analysis D7511-12 1 288713 08/23/22 08:07 CBM8 ELLE Instrument ID: 19369 Total/NA Analysis OIA-1677 1 410147 08/26/22 12:14 SNR EET PIT Instrument ID: ALPKEM3 Total/NA Analysis OIA-1677 1 410229 08/27/22 10:55 SNR EET PIT Instrument ID: ALPKEM3 Client Sample ID: B303 Date Collected: 08/17/22 16:35 Date Received: 08/19/22 09:30 Prep Type Lab Sample ID: 680-219919-4 Matrix: Water Batch Batch Dil Initial Final Batch Prepared Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 737344 08/24/22 18:59 AF EET SAV Instrument ID: CICK Eurofins Savannah Page 13 of 23 8/29/2022 Lab Chronicle Client: Civil & Environmental Consultants Inc Job ID: 680-219919-1 Project/Site: Alcoa - Badin NC (GW) Client Sample ID: B303 Date Collected: 08/17/22 16:35 Date Received: 08/19/22 09:30 Lab Sample ID: 680-219919-4 Matrix: Water Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis D7511-12 1 288713 08/23/22 08:09 CBM8 ELLE Total/NA Analysis OIA-1677 1 410147 08/26/22 12:16 SNR EET PIT Instrument ID: ALPKEM3 Total/NA Analysis OIA-1677 Instrument ID: ALPKEM3 1 410229 08/27/22 10:57 SNR EET PIT Client Sample ID: B304 Date Collected: 08/17/22 15:10 Date Received: 08/19/22 09:30 Lab Sample ID: 680-219919-5 Matrix: Water Prep Type Batch Batch Dil Initial Final Batch Prepared Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Total/NA Total/NA Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 737344 08/24/22 19:12 AF EET SAV Instrument ID: LICK Analysis D7511-12 1 288713 08/23/22 08:11 CBM8 ELLE Instrument ID: 19369 Analysis OIA-1677 Instrument ID: ALPKEM3 Analysis OIA-1677 Instrument ID: ALPKEM3 1 1 410147 08/26/22 12:17 SNR EET PIT 410229 08/27/22 10:58 SNR EET PIT Client Sample ID: B305 Date Collected: 08/17/22 13:20 Date Received: 08/19/22 09:30 Lab Sample ID: 680-219919-6 Matrix: Water Prep Type Batch Batch Type Method Run Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Total/NA Total/NA Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 737345 08/24/22 20:53 UI EET SAV Instrument ID: CICK Analysis D7511-12 1 288713 08/23/22 08:14 CBM8 ELLE Instrument ID: 19369 Analysis OIA-1677 1 410147 08/26/22 12:19 SNR EET PIT Instrument ID: ALPKEM3 Analysis OIA-1677 1 410229 08/27/22 11:00 SNR EET PIT Instrument ID: ALPKEM3 Client Sample ID: MW 219 Date Collected: 08/18/22 12:05 Date Received: 08/19/22 09:30 Lab Sample ID: 680-219919-7 Matrix: Water Prep Type Batch Batch Type Method Run Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 737345 08/24/22 21:05 UI EET SAV Instrument ID: LICK Total/NA Analysis D7511-12 1 288713 08/23/22 08:16 CBM8 ELLE Instrument ID: 19369 Total/NA Analysis OIA-1677 1 410147 08/26/22 12:20 SNR EET PIT Instrument ID: ALPKEM3 Eurofins Savannah Page 14 of 23 8/29/2022 Lab Chronicle Client: Civil & Environmental Consultants Inc Job ID: 680-219919-1 Project/Site: Alcoa - Badin NC (GW) Client Sample ID: MW 219 Date Collected: 08/18/22 12:05 Date Received: 08/19/22 09:30 Lab Sample ID: 680-219919-7 Matrix: Water Prep Type Batch Batch Dil Initial Final Batch Prepared Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis OIA-1677 1 Client Sample ID: MW218 Date Collected: 08/18/22 10:45 Date Received: 08/19/22 09:30 410229 08/27/22 11:10 SNR EET PIT Lab Sample ID: 680-219919-8 Matrix: Water Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 737345 08/24/22 21:18 Ul EET SAV Instrument ID: CICK Total/NA Analysis D7511-12 1 288713 08/23/22 08:18 CBM8 ELLE Instrument ID: 19369 Total/NA Analysis OIA-1677 1 410147 08/26/22 12:22 SNR EET PIT Instrument ID: ALPKEM3 Total/NA Analysis OIA-1677 1 410229 08/27/22 11:12 SNR EET PIT Instrument ID: ALPKEM3 Laboratory References: EET PIT = Eurofins Pittsburgh, 301 Alpha Drive, RIDC Park, Pittsburgh, PA 15238, TEL (412)963-7058 EET SAV = Eurofins Savannah, 5102 LaRoche Avenue, Savannah, GA 31404, TEL (912)354-7858 ELLE = Eurofins Lancaster Laboratories Environment Testing, LLC, 2425 New Holland Pike, Lancaster, PA 17601, TEL (717)656-2300 Eurofins Savannah Page 15 of 23 8/29/2022 Eurofins Savannah Chain of Custody Record 5102 LaRoche Avenue COC No: 680-138151-50348 1 Page. Page 1 of 1 Preservation Codes A -HCL M - Hexane 8-NaOH N - None C-Zn Acetate O-AaNa02 D - Nitric Acid P - Na204S E - NaHSO4 O - Na2S20 F -MeOH R-Na2S3 G- Amchlor S-H2SO4 H - Ascorbic Acid T - TSP Dodecahydrate l -Ice U -Acetone J -Dl Water W-pH - K-EDTA -pH 4-5 L - EDA Y Trizma Z other (specify) Other- S ecial Instructions/Note: 1 1(A fee may . e -ssessed if samples are retained longer than 1 month) Client L Disposal By Lab Archive For Months ns/QC Requirements, 'Method of Shipment ' k‘ U Company --1 Company ure(s) °C and Other Remarks. 2 r l �Z. O .� /� . E E Carrier Tracking No(s). State of Originfjc Analysis Requested sJau(e;uoo;o LegwWi nN I `; nsus com apponld (WOW) - oeZ Wd9210 OOC z s \ 2.� `� !,� �,, Lab PM Hoffman Sheila 8 E-Mail: Sheila Hoffman@et.eurofi (uol;oe(ul mold) eau'apluedo - said LL9I \ a Nwa \ Sample Disposal 0 Retum To Special Instructio' (Empty Kit Relinquished by 'Date (Time. a o Received by. Cooler Temperat (uosoa(u(mold) algellemy'aplue6o-LL9L'z. \N ,\ > ay aplueAo lelol- Z L Ll9Lo .,'.m; a NN, N. N. •Compaq L `(...... Company t a N E U Custody Seal No '- (op -o sa j a(dwe5 Penllid Pleld .. IPrasible Hazard Identification Non -Hazard 0 Flammable Skin Irritant Poison B Unknown = Radiological Deliverable Requested I, II, III, IV, Other (specify) 1 e) Ili s) to' s) to' Water e) Iii e)TO tri Water L" L Due Date Requested. TAT Requested (days) Compliance Project 4 Yes <No PO #: Purchase Order Requested Project #: 68025248 Matrix (w.rwenr sesald, ow�,.won, BT.Tissue, A.Air) Preservation Code- e) Z.La co Ph— V a IFii0 `J�� ��� ®3 a la !Company - Civil & Environmental Consultants Inc ram, to H , �' (YN .. `sue` . -- \ - '— Sample Date c c (Relinquished by Address. 2704 Cherokee Farm Way Suite 101 .. C State, Zip: TN 37920 Phone: Email mworden@cecinc.com Project Name: Alcoa - Badin NC (GW) Site: Sample Identification e k . , , A . 7 . ) , 0, V)V1‘ c Ak 0 --__ 0- ) c'e% \ v e ) CNr'' qT— ‘ „- - - c --.1.-1. _ 0 'Client Information Client Contact Michael Worden Custody Seals Intact: A Yes A No toW O b O Page 16 of 23 8/29/2022 Preservation Codes: A-HCL M - Hexane B - NaOH N - None C - Zn Acetate O - AaNa02 D - Nitric Acid P - Na204S E - NaHSO4 R - Na2S03 F - McOH - Na2s203 G- Amchlor S-H2SO4 H -Ascorbic Acid T - TSP Dodecahydrate I -Ice U - Acetone J - DI Water V-MCAA K - EDTA W - pH 4-5 L-EDA Y - Trizma Z - other (specify) Other: Special Instructions/Note: subjectchangeTesting placesownership analytecomplianceupon t p shipment is forwarded under chain -of -custody If the laboratory Note Since laboratoryaccreditations are to Eurofins Environment Southeast, LLC the of method, & accreditation u on out subcontract laboratone This sample does not currently maintain accreditation in the State of Origin listed above for analysis/tests/matrix being analyzed, the samples must be shipped back to the Eurofins Environment Testing Southeast, LLC laboratory or other instructions will be provided Any changes to accreditation status should be brought to Eurofins Environment Testing Southeast, LLC attention immediately If all requested accreditation are current to date return the signed Chain of Custody attesting to said complicahce to Eurofins Environment Testing Southeast, LLC Sample Disposal (A fee may be assessed if samples are retained longer than 1 month) I I Return To Client O Disposal By Lab 0 Archive For Months Special Instructions/QC Requirements Empty Klt Relinquished by' Date 'Time. / 'Method of Shipment: E 0 U E 0 U Company Cooler Temperature(s) °C and Other Remarks r f �y E C m 3 E E @ 8 E w m 0 Due Date Requested: 9/1/2022 Analysis Requested sSaufe}uoa-{o a WfN leloi c _ ro oo -, ro qs.. _ oo w a3 Received • 201-2,z Received by v Received by LUI V1111J CIV01111Q11 5102LaRocheAvenue Chain of Custody Record Savannah, GA 31404'''N � Phone 912-354-7858 Fax: 912-352-0165 Sampler Lab PM Client Information (Sub Contract Lab) Hoffman, Sheila B Client Contact: Phone E-Mail 6F Shipping/Receiving Sheila Hoffman@et eurofinsus (uoi;oaful moIj) aa)j'epIueA3 laa)j LL96 X X X X X X X X (uonoafulmold) °Kgepew'apluedp1119L X X X X X X X X Company Company I Company Custody Seal No 1 li l I (aFla??'a7C) aS01Sbni!!l+a14T4� Possible Hazard Identification Unconfirmed 'Deliverable Requested I, II, III, IV, Other (specify) Primary Deliverable Rank 2 -(oN 46sa J doves pale)lld-plalf . . TAT Requested (days): Project* 68025248 Matrix (w=water, S=solid, 0=wastetoil, BT=Tissue, A=Air) Preservation Code: 1 m m Water Water Water Water m m V jQ�` d E Date/Time ` E ca ~ U 0 a) 0. a) u) F c ,— Yo 20) W c Nip 2u, W c N� a3° W c N� a)� W c NN a)� W c �p a W c N, 1 a5° W c aa)a)) @ W # o O U Sample Date 8/17/22 8/18/22 N N W I,- o NN I- a N I,- a 8/18/22 8/18/22 Relinquished by Relinquished by Relinquished by Address 301 Alpha Drive, RIDC Park, Er? 9 U E. State Zip PA, 15238 Phone 412-963-7058(Tel) 412-963-2468(Fax) W 'Project Name Alcoa - Badin NC (GW) Sample Identification - Client ID (Lab ID) B300 (680-219919-1) F-- 6301 (680-219919-2) 16302 (680-219919-3) B303 (680-219919-4) B304 (680-219919-5) 6305(680-219919-6) MW 219 (680-219919-7) 1MW218 (680-219919-8) Custody Seals Intact: Yes 4 No S V u Page 17 of 23 8/29/2022 Eurofins Savannah 5102 LaRoche Avenue Savannah, GA 31404 Phone: 912-354-7858 Fax 912-352-0165 Chain of Custody Record II II 111 eurofins -nvlronment Testing t>nerica Client Information (Sub Contract Lab) Sampler Lab PM Hoffman, Sheila B Gamer Tracking Not') COC No 680-705518 1 Client Contact Shipping/Receiving Phone: E-Mail Sheila Hoffman@et eurofinsus com State o1 Origin North Carolina Page Page 1 of 1 Company Eurofins Lancaster Laboratories Environm Accreditations Required (See note) State - North Carolina (WW/SW) Job a 680-219919-1 Address 2425 New Holland Pike Due Date Requested: 9/1/2022 Analysis Requested Preservation Codes: A HCL kg -Hexane N - None e- 0- ASNaO2 zo Acetate C - Zn Acetate P - Na204S D Nitric Acid E - NaH504 0 - Na2S03 R - Na2S203 F -MeOH S-H2SO4 H - Ascorbic Acid T - TSP Dodecahydrate i - Ice U-Arrtone J - DI Water V - MCAA K -EDTA W-p114.5 Y - Trzme L MA z - other (specify) Other: City Lancaster TAT Requested (days)' 'Field Filtered Sample (Yes or No) Perform MSIMSD (Yes or No) 1 01511 12/ Total Cyanide Total Number of containers State. Zip: PA, 17601 Phone 717-656-2300(Tel) PO Email WO # Project Name: Alcoa - Badin NC (GW) Protect a: 68025248 S.le SSOW# Sample Identification - Client ID (Lab ID) Sample Sample Time Sample Type (C=comp, G=grab) Matrix (w...a.. s..om. D....00. oT.rn.......;,) Special Instructions/Note: I XPreservation Code B300 (680-219919-1) 8/17/22 19 10 Eastern Water X 1 Price from Lancaster is 536 per sample B301 (680-219919-2) 8/18/22 09 05 Eastern Water X 1 Price from Lancaster is 536 per sample 8302 (680-219919-3) 8/17/22 18.00 Eastern Water X 1 Price from Lancaster is 536 per sample 8303 (680-219919-4) 8/17/22 16 35 Eastern Water X 5 • Pnce from Lancaster is 536 per sample 8304 (680-219919-5) 8/17/22 15 10 Eastern Water X 1 Price from Lancaster is 536 per sample B305 (680-219919-6) 8/17/22 1320 Eastem Water X Price from Lancaster is 536 per sample MW 219 (680-219919-7) 8118/22 12.05 Eastem Water X 1 Pnce from Lancaster is 536 per sample MW218 (680-219919-8) 8/18/22 10 45 Eastern Water X Price from Lancaster is 536 per sample Note: Since laboratory acereditations are subject to change. Eurofins Environment Testing Southeast. LLC places the ownership of method. analyze 6 accreditation compliance upon out subcontract aboratories. Tha sample shipment is forwarded under chain -of -custody. If the laboratory does not currently maintain accreditation in the State of Ongm listed above for analysis/tests/matrix being analyzed, the samples must be shipped back to the Eurofins Environment Testing Southeast, LLC laboratory or other instructions will be provided. Any charges to accreditation status should be brought to Eurofins Environment Testing Southeast. LLC attention immediately If all requested acuednabons are current to dale, retu n the signed Chain of Custody attesting to said complicance to Eurofins Environment Testing Southeast, LLC Possible Hazard identification Unconfirmed Sample Disposal ( A fee may be assessed if samples are retained longer than 1 month) CRetum To Client C, Disposal By Lab Archive For Months Deliverable Requested I, II, 111, IV, Other (specify) Primary Deliverable Rank 2 Special Instructions/QC Requirements Empty Kit Relinquished by Date Time ,Method or Shipment VV Relinquished by Date/Time (Company Received by jOate/Time —� (Company a Relinquished by Date/Time n Received by I Date/Time ir l� RehppWSlled be -Date/Thme. Received D ime: _ CI:—Coi]h any Custody Seals Intact A Yes A No Custody Seal No Cooler Temperature(s) °C and Omer Remarks rj oti Page 18 of 23 Vet-- 06/OS'2021 8/29/2022 Login Sample Receipt Checklist Client: Civil & Environmental Consultants Inc Job Number: 680-219919-1 Login Number: 219919 List Number: 1 Creator: Bissonnette, lan Question Answer Comment List Source: Eurofins Savannah Radioactivity wasn't checked or is </= background as measured by a survey N/A meter. The cooler's custody seal, if present, is intact. True Sample custody seals, if present, are intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable. True Cooler Temperature is recorded. True COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True Is the Field Sampler's name present on COC? True There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True Sample Preservation Verified. N/A There is sufficient vol. for all requested analyses, incl. any requested True MS/MSDs Containers requiring zero headspace have no headspace or bubble is N/A <6mm (1/4"). Multiphasic samples are not present. True Samples do not require splitting or compositing. True Residual Chlorine Checked. N/A Eurofins Savannah Page 19 of 23 8/29/2022 Login Sample Receipt Checklist Client: Civil & Environmental Consultants Inc Job Number: 680-219919-1 Login Number: 219919 List Number: 2 Creator: Ballard, Megan Question List Source: Eurofins Lancaster Laboratories Environment Testing, LLC List Creation: 08/20/22 10:03 AM Answer Comment The cooler's custody seal is intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable (</=6C, not frozen). True Cooler Temperature is recorded. True WV: Container Temperature is acceptable (</=6C, not frozen). N/A WV: Container Temperature is recorded. N/A COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True There are no discrepancies between the containers received and the COC. True Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True There is sufficient vol. for all requested analyses. True Is the Field Sampler's name present on COC? False Sample custody seals are intact. N/A VOA sample vials do not have headspace >6mm in diameter (none, if from WV)? N/A Received project as a subcontract. Eurofins Savannah Page 20 of 23 8/29/2022 Login Sample Receipt Checklist Client: Civil & Environmental Consultants Inc Job Number: 680-219919-1 Login Number: 219919 List Number: 3 Creator: Watson, Debbie Question Answer Comment List Source: Eurofins Pittsburgh List Creation: 08/20/22 12:34 PM Radioactivity wasn't checked or is </= background as measured by a survey N/A meter. The cooler's custody seal, if present, is intact. True Sample custody seals, if present, are intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable. True Cooler Temperature is recorded. True COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True Is the Field Sampler's name present on COC? N/A There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True Sample Preservation Verified. True There is sufficient vol. for all requested analyses, incl. any requested True MS/MSDs Containers requiring zero headspace have no headspace or bubble is True <6mm (1/4"). Multiphasic samples are not present. True Samples do not require splitting or compositing. True Residual Chlorine Checked. N/A Eurofins Savannah Page 21 of 23 8/29/2022 Accreditation/Certification Summary Client: Civil & Environmental Consultants Inc Project/Site: Alcoa - Badin NC (GW) Laboratory: Eurofins Savannah The accreditations/certifications listed below are applicable to this report. Job ID: 680-219919-1 Authority Program Identification Number Expiration Date North Carolina (WW/SW) State 269 12-31-22 Laboratory: Eurofins Lancaster Laboratories Environment Testing, LLC All accreditations/certifications held by this laboratory are listed. Not all accreditations/certifications are applicable to this report. Authority Program Identification Number Expiration Date A2LA A2LA Alaska Alaska (UST) Arizona Arkansas DEQ California Colorado Connecticut DE Haz. Subst. Cleanup Act (HSCA) Delaware (DW) Florida Georgia (DW) Hawaii Illinois Iowa Kansas Kentucky (DW) Kentucky (UST) Kentucky (WW) Louisiana Maine Maryland Massachusetts Michigan Minnesota Missouri Montana (DW) Montana (UST) Nebraska New Hampshire New Jersey New York North Carolina (DW) North Carolina (WW/SW) North Dakota Oklahoma Oregon PALA Pennsylvania Rhode Island South Carolina Tennessee Texas Dept. of Defense ELAP ISO/IEC 17025 State State State State State State State State State NELAP State State NELAP State NELAP State State State NELAP State State State State NELAP State State State State NELAP NELAP NELAP State State State NELAP NELAP Canada NELAP State State State NELAP * Accreditation/Certification renewal pending - accreditation/certification considered valid. 0001.01 11-30-22 0001.01 11-30-22 PA00009 07-01-23 17-027 02-28-23 AZ0780 03-12-23 88-0660 08-10-22 * 2792 11-30-22 PA00009 06-30-23 PH-0746 06-30-23 019-006(PA cert) 01-31-23 N/A 01-31-23 E87997 06-30-23 C048 01-31-23 N/A 01-31-23 200027 01-31-23 361 03-02-22* E-10151 10-31-22 KY90088 12-31-22 1.01 11-30-22 KY90088 01-01-23 02055 06-30-23 2019012 03-12-23 100 06-30-23 M-PA009 06-30-23 9930 01-31-23 042-999-487 12-31-22 450 01-31-25 0098 01-01-23 <cert No.> 02-01-23 NE-OS-32-17 01-31-23 2730 01-10-23 PA011 06-30-23 10670 04-01-23 42705 07-31-23 521 12-31-22 R-205 01-31-23 R-205 08-31-22 PA200001 09-11-22 1978 09-16-24 36-00037 01-31-23 LA000338 12-30-22 89002 01-31-23 02838 01-31-23 T104704194-21-40 08-31-22 Eurofins Savannah Page 22 of 23 8/29/2022 Accreditation/Certification Summary Client: Civil & Environmental Consultants Inc Project/Site: Alcoa - Badin NC (GW) Laboratory: Eurofins Lancaster Laboratories Environment Testing, LLC (Continued) All accreditations/certifications held by this laboratory are listed. Not all accreditations/certifications are applicable to this report. Job ID: 680-219919-1 Authority Program Identification Number Expiration Date USDA US Federal Programs P330-19-00197 08-09-23 Vermont State VT - 36037 10-28-22 Virginia NELAP 460182 06-15-23 Washington State C457 04-11-23 West Virginia (DW) State 9906 C 12-31-22 West Virginia DEP State 055 10-31-22 Wyoming State BTMS-L 01-31-23 Wyoming (UST) A2LA 1.01 11-30-22 Laboratory: Eurofins Pittsburgh The accreditations/certifications listed below are applicable to this report. Authority Program Identification Number Expiration Date North Carolina (WW/SW) State 434 12-31-22 Eurofins Savannah Page 23 of 23 8/29/2022 Hydrogeological Conceptual Site Model Update — Badin Business Park Attachment G 2019 to 2021 Fluoride and Cyanide Track Down Analytical Results EHS Support LLC Draft — Hydrogeological Conceptual Site Model Update — Badin Business Park 680-196438-1; 2.050 EHS Support LLC LINKS Review your project results through �TotaAccesss Visit us at: www. eurofinsus.comfEnv eurofins ti Environment Testing America ANALYTICAL REPORT Eurofins TestAmerica, Savannah 5102 LaRoche Avenue Savannah, GA 31404 Tel: (912)354-7858 Laboratory Job ID: 680-196438-1 For: Civil & Environmental Consultants Inc 2704 Cherokee Farm Way Suite 101 Knoxville, Tennessee 37920 Attn: Michael Worden Authorized for release by: 3/26/2021 12:47:38 PM Sheila Hoffman, Project Manager II (912)250-0279 Sheila.Hoffman@Eurofinset.com The test results in this report meet all 2003 NELAC, 2009 TNI, and 2016 TNI requirements for accredited parameters, exceptions are noted in this report. This report may not be reproduced except in full, and with written approval from the laboratory. For questions please contact the Project Manager at the e-mail address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature. Results relate only to the items tested and the sample(s) as received by the laboratory. Method Summary Client: Civil & Environmental Consultants Inc Job ID: 680-196438-1 Method Method Description Protocol Laboratory 300.0-1993 R2.1 200.7 Rev 4.4 1664B 2540 D-2011 4500 NH3 G-2011 D7511-12 OIA-1677 SM 5210B 1664E 200.7-1994 R4.4 4500 NH3 B-2011 Anions, Ion Chromatography Metals (ICP) HEM and SGT-HEM Total Suspended Solids (Dried at 103-105°C) Ammonia Total Cyanide Cyanide, Free (Flow Injection) BOD, 5-Day HEM and SGT-HEM (Aqueous) Preparation, Total Metals Ammonia, Distillation MCAWW TAL SAV 40CFR136A TAL SAV 1664B TAL SAV SM TAL SAV SM TAL SAV ASTM ELLE 01 CORP TAL PIT SM TAL SAV 1664B TAL SAV EPA TAL SAV SM TAL SAV Protocol References: 1664B = EPA-821-98-002 40CFR136A = "Methods for Organic Chemical Analysis of Municipal Industrial Wastewater", 40CFR, Part 136, Appendix A, October 26, 1984 and subsequent revisions. ASTM = ASTM International EPA = US Environmental Protection Agency MCAWW = "Methods For Chemical Analysis Of Water And Wastes", EPA-600/4-79-020, March 1983 And Subsequent Revisions. 01 CORP = 01 Corporation Instrument Manual. SM = "Standard Methods For The Examination Of Water And Wastewater" Laboratory References: ELLE = Eurofins Lancaster Laboratories Env, LLC, 2425 New Holland Pike, Lancaster, PA 17601, TEL (717)656-2300 TAL PIT = Eurofins TestAmerica, Pittsburgh, 301 Alpha Drive, RIDC Park, Pittsburgh, PA 15238, TEL (412)963-7058 TAL SAV = Eurofins TestAmerica, Savannah, 5102 LaRoche Avenue, Savannah, GA 31404, TEL (912)354-7858 Eurofins TestAmerica, Savannah Page 2 of 23 3/26/2021 Sample Summary Client: Civil & Environmental Consultants Inc Job ID: 680-196438-1 Lab Sample ID Client Sample ID Matrix Collected Received Asset ID 680-196438-1 0ut005-13-2-050 Water 03/17/21 11:30 03/18/21 15:31 Eurofins TestAmerica, Savannah Page 3 of 23 3/26/2021 Definitions/Glossary Client: Civil & Environmental Consultants Inc Job ID: 680-196438-1 Qualifiers Metals Qualifier Qualifier Description J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. General Chemistry Qualifier Qualifier Description LCS and/or LCSD is outside acceptance limits, low biased. *1 LCS/LCSD RPD exceeds control limits. F1 MS and/or MSD recovery exceeds control limits. J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. Glossary Abbreviation These commonly used abbreviations may or may not be present in this report. Listed under the "D" column to designate that the result is reported on a dry weight basis %R Percent Recovery CFL Contains Free Liquid CFU Colony Forming Unit CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) Dil Fac Dilution Factor DL Detection Limit (DoD/DOE) DL, RA, RE, IN Indicates a Dilution, Re -analysis, Re -extraction, or additional Initial metals/anion analysis of the sample DLC Decision Level Concentration (Radiochemistry) EDL Estimated Detection Limit (Dioxin) LOD Limit of Detection (DoD/DOE) LOQ Limit of Quantitation (DoD/DOE) MCL EPA recommended "Maximum Contaminant Level" MDA Minimum Detectable Activity (Radiochemistry) MDC Minimum Detectable Concentration (Radiochemistry) MDL Method Detection Limit ML Minimum Level (Dioxin) MPN Most Probable Number MQL Method Quantitation Limit NC Not Calculated ND Not Detected at the reporting limit (or MDL or EDL if shown) NEG Negative / Absent POS Positive / Present PQL Practical Quantitation Limit PRES Presumptive QC Quality Control RER Relative Error Ratio (Radiochemistry) RL Reporting Limit or Requested Limit (Radiochemistry) RPD Relative Percent Difference, a measure of the relative difference between two points TEF Toxicity Equivalent Factor (Dioxin) TEQ Toxicity Equivalent Quotient (Dioxin) TNTC Too Numerous To Count Eurofins TestAmerica, Savannah Page 4 of 23 3/26/2021 Case Narrative Client: Civil & Environmental Consultants Inc Job ID: 680-196438-1 Job ID: 680-196438-1 Laboratory: Eurofins TestAmerica, Savannah Narrative CASE NARRATIVE Client: Civil & Environmental Consultants Inc Project: Alcoa - Groundwater & Waste Characteriza Report Number: 680-196438-1 With the exceptions noted as flags or footnotes, standard analytical protocols were followed in the analysis of the samples and no problems were encountered or anomalies observed. In addition all laboratory quality control samples were within established control limits, with any exceptions noted below. Each sample was analyzed to achieve the lowest possible reporting limit within the constraints of the method. In the event of interference or analytes present at high concentrations, samples may be diluted. For diluted samples, the reporting limits are adjusted relative to the dilution required. RECEIPT The samples were received on 03/18/2021; the samples arrived in good condition, properly preserved and on ice. The temperature of the coolers at receipt was 1.1 C. METALS (ICP) Sample Out005-13-2-050 (680-196438-1) was analyzed for Metals (ICP) in accordance with EPA Method 200.7. The samples were prepared on 03/19/2021 and analyzed on 03/23/2021. No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. HEM AND SGT-HEM Sample Out005-13-2-050 (680-196438-1) was analyzed for HEM and SGT-HEM in accordance with EPA Method 1664B. The samples were prepared and analyzed on 03/24/2021. No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. FREE CYANIDE Sample Out005-13-2-050 (680-196438-1) was analyzed for free cyanide in accordance with 1677. The samples were analyzed on 03/24/2021. Cyanide, Free failed the recovery criteria low for the MS of sample Out005-13-2-050MS (680-196438-1) in batch 180-350778. Cyanide, Free failed the recovery criteria low for the MSD of sample Out005-13-2-050MSD (680-196438-1) in batch 180-350778. Sample matrix interference and/or non -homogeneity are suspected because the associated laboratory control sample (LCS) recovery was within acceptance limits. Refer to the QC report for details. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. TOTAL SUSPENDED SOLIDS Sample Out005-13-2-050 (680-196438-1) was analyzed for total suspended solids in accordance with SM 2540D. The samples were analyzed on 03/22/2021. No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. ANIONS BY ION CHROMATOGRAPHY (28 DAY) Sample Out005-13-2-050 (680-196438-1) was analyzed for Anions by Ion Chromatography (28 Day) in accordance with EPA Method 300.0. The samples were analyzed on 03/22/2021. Eurofins TestAmerica, Savannah Page 5 of 23 3/26/2021 Case Narrative Client: Civil & Environmental Consultants Inc Job ID: 680-196438-1 Job ID: 680-196438-1 (Continued) Laboratory: Eurofins TestAmerica, Savannah (Continued) No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. BIOCHEMICAL OXYGEN DEMAND Sample Out005-13-2-050 (680-196438-1) was analyzed for Biochemical Oxygen Demand in accordance with SM 5210B. The samples were analyzed on 03/18/2021. Biochemical Oxygen Demand failed the recovery criteria low for LCSD 680-660304/3. Biochemical Oxygen Demand exceeded the RPD limit. The method holding time had expired, therefore the analysis was not repeated. The data was qualified and reported. Refer to the QC report for details. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. CYANIDE Sample Out005-13-2-050 (680-196438-1) was analyzed for cyanide in accordance with D7511-12. The samples were analyzed on 03/23/2021. No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. AMMONIA Sample Out005-13-2-050 (680-196438-1) was analyzed for ammonia in accordance with SM 4500 NH3 G. The samples were prepared and analyzed on 03/19/2021. No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Eurofins TestAmerica, Savannah Page 6 of 23 3/26/2021 Client Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-196438-1 Client Sample ID: Out005-13-2-050 Date Collected: 03/17/21 11:30 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-1 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate 37 1.0 0.40 mg/L 03/22/21 19:56 1 Fluoride 2.1 0.10 0.040 mg/L 03/22/21 19:56 1 Chloride 3.3 0.50 0.20 mg/L 03/22/21 19:56 1 Bromide <0.20 0.50 0.20 mg/L 03/22/21 19:56 1 Method: 200.7 Rev 4.4 - Metals (ICP) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Aluminum 35 J 200 24 ug/L 03/19/21 14:01 03/23/21 16:20 1 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac HEM (Oil & Grease) 1.4 J 5.1 1.4 mg/L 03/24/21 08:04 03/24/21 10:17 1 Ammonia <0.10 0.25 0.10 mg/L 03/19/21 10:00 03/19/21 11:00 1 Cyanide, Total 0.028 0.0060 0.0020 mg/L 03/23/21 17:27 1 Cyanide, Free <0.00079 F1 0.0020 0.00079 mg/L 03/24/21 21:27 1 Analyte Result Qualifier RL RL Unit D Prepared Analyzed Dil Fac Total Suspended Solids <2.5 2.5 2.5 mg/L 03/22/21 10:36 1 Biochemical Oxygen Demand <2.0 *-*1 2.0 2.0 mg/L 03/18/21 19:44 1 Eurofins TestAmerica, Savannah Page 7 of 23 3/26/2021 QC Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-196438-1 Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Lab Sample ID: MB 680-660756/33 Matrix: Water Analysis Batch: 660756 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate <0.40 1.0 0.40 mg/L 03/22/21 19:18 1 Fluoride <0.040 0.10 0.040 mg/L 03/22/21 19:18 1 Chloride <0.20 0.50 0.20 mg/L 03/22/21 19:18 1 Bromide <0.20 0.50 0.20 mg/L 03/22/21 19:18 1 Lab Sample ID: LCS 680-660756/34 Matrix: Water Analysis Batch: 660756 Analyte Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Sulfate 10.0 9.75 mg/L 98 90 - 110 Fluoride 2.00 2.04 mg/L 102 90 - 110 Chloride 10.0 10.0 mg/L 100 90 - 110 Bromide 10.0 9.89 mg/L 99 90. 110 Lab Sample ID: LCSD 680-660756/35 Matrix: Water Analysis Batch: 660756 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Spike LCSD LCSD %Rec. RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Sulfate 10.0 9.75 mg/L 98 90 _ 110 0 15 Fluoride 2.00 2.05 mg/L 102 90 _ 110 0 15 Chloride 10.0 10.0 mg/L 100 90 _ 110 0 15 Bromide 10.0 9.87 mg/L 99 90 _ 110 0 15 Lab Sample ID: 680-196438-1 MS Matrix: Water Analysis Batch: 660756 Analyte Client Sample ID: Out005-13-2-050 Prep Type: Total/NA Sample Sample Spike MS MS %Rec. Result Qualifier Added Result Qualifier Unit D %Rec Limits Sulfate 37 10.0 46.6 mg/L 99 80 _ 120 Fluoride 2.1 2.00 4.14 mg/L 101 80 _ 120 Chloride 3.3 10.0 13.6 mg/L 103 80 _ 120 Bromide <0.20 10.0 10.1 mg/L 101 80 - 120 Lab Sample ID: 680-196438-1 MSD Matrix: Water Analysis Batch: 660756 Client Sample ID: out005-13-2-050 Prep Type: Total/NA Sample Sample Spike MSD MSD %Rec. RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Sulfate 37 10.0 46.4 mg/L 97 80 - 120 0 15 Fluoride 2.1 2.00 4.10 mg/L 99 80. 120 1 15 Chloride 3.3 10.0 13.3 mg/L 100 80. 120 2 15 Bromide <0.20 10.0 9.81 mg/L 98 80 _ 120 2 15 Eurofins TestAmerica, Savannah Page 8 of 23 3/26/2021 QC Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-196438-1 Method: 200.7 Rev 4.4 - Metals (ICP) pLab Sample ID: MB 680-660466/1-A Matrix: Water Analysis Batch: 661019 Analyte Client Sample ID: Method Blank Prep Type: Total/NA Prep Batch: 660466 MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Aluminum <24 200 24 ug/L 03/19/21 14:01 03/23/21 15:39 1 pLab Sample ID: LCS 680-660466/2-A Matrix: Water Analysis Batch: 661019 Analyte Client Sample ID: Lab Control Sample Prep Type: Total/NA a Prep Batch: 660466 Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Aluminum 5000 4730 ug/L 95 85.115 Method: 1664B - HEM and SGT-HEM rLab Sample ID: MB 680-661023/1-A Matrix: Water Analysis Batch: 661083 LAnalyte Client Sample ID: Method Blank Prep Type: Total/NA Prep Batch: 661023 MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac HEM (Oil & Grease) <1.4 Lab Sample ID: LCS 680-661023/2-A Matrix: Water Analysis Batch: 661083 Analyte 5.0 1.4 mg/L 03/24/21 08:04 03/24/21 10:17 1 Client Sample ID: Lab Control Sample Prep Type: Total/NA Prep Batch: 661023 Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits HEM (Oil & Grease) [Lab Sample ID: LCSD 680-661023/3-A Matrix: Water Analysis Batch: 661083 Analyte 40.0 35.40 mg/L 88 78. 114 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Prep Batch: 661023 Spike LCSD LCSD %Rec. RPD Added Result Qualifier Unit D %Rec Limits RPD Limit HEM (Oil & Grease) 40.0 36.00 mg/L 90 78 - 114 2 18 Method: 2540 D-2011 - Total Suspended Solids (Dried at 103-105°C) Lab Sample ID: MB 680-660730/1 Matrix: Water Analysis Batch: 660730 Analyte MB MB Result Qualifier RL Client Sample ID: Method Blank Prep Type: Total/NA RL Unit D Prepared Analyzed Dil Fac Total Suspended Solids <2.5 2.5 2.5 mg/L 03/22/21 10:36 1 Lab Sample ID: LCS 680-660730/2 Matrix: Water Analysis Batch: 660730 Analyte Total Suspended Solids Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits 951 840 mg/L 88 80 -120 Eurofins TestAmerica, Savannah Page 9 of 23 3/26/2021 QC Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-196438-1 Method: 2540 D-2011 - Total Suspended Solids (Dried at 103-105°C) (Continued) pLab Sample ID: LCSD 680-660730/3 Matrix: Water Analysis Batch: 660730 Analyte Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Spike LCSD LCSD %Rec. RPD Added Result Qualifier Unit D %Rec Limits RPD Limit Total Suspended Solids 951 886 mg/L 93 80 - 120 5 25 Method: 4500 NH3 G-2011 - Ammonia Lab Sample ID: MB 680-660390/1-A Matrix: Water Analysis Batch: 660415 Analyte MB MB Client Sample ID: Method Blank a Prep Type: Total/NA Prep Batch: 660390 Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Ammonia <0.10 0.25 0.10 mg/L 03/19/21 10:00 03/19/21 10:55 1 rLab Sample ID: LCS 680-660390/3-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 660415 Prep Batch: 660390 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Ammonia 1.00 0.924 mg/L 92 90 _ 110 Method: D7511-12 - Total Cyanide Lab Sample ID: MB 410-107202/17 Matrix: Water Analysis Batch: 107202 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total <0.0020 0.0060 0.0020 mg/L 03/23/21 16:07 1 [—Lab Sample ID: MB 410-107202/47 Matrix: Water Analysis Batch: 107202 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total <0.0020 0.0060 0.0020 mg/L 03/23/21 17:07 1 Lab Sample ID: LCS 410-107202/16 Matrix: Water Analysis Batch: 107202 Analyte Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Cyanide, Total Lab Sample ID: LCS 410-107202/46 Matrix: Water Analysis Batch: 107202 Analyte Cyanide, Total 0.0400 0.0381 mg/L 95 84. 116 Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits 0.0300 0.0307 mg/L 102 84 -116 Eurofins TestAmerica, Savannah Page 10 of 23 3/26/2021 QC Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-196438-1 Method: OIA-1677 - Cyanide, Free (Flow Injection) Lab Sample ID: MB 180-350778/21 Matrix: Water Analysis Batch: 350778 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Free <0.00079 Lab Sample ID: LCS 180-350778/20 Matrix: Water Analysis Batch: 350778 Analyte 0.0020 0.00079 mg/L 03/24/21 21:26 1 Client Sample ID: Lab Control Sample Prep Type: Total/NA El Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Cyanide, Free Lab Sample ID: 680-196438-1 MS Matrix: Water Analysis Batch: 350778 Analyte 0.0500 0.0528 mg/L 106 82 _ 132 Client Sample ID: Out005-13-2-050 Prep Type: Total/NA Sample Sample Spike MS MS %Rec. Result Qualifier Added Result Qualifier Unit D %Rec Limits Cyanide, Free <0.00079 F1 0.0500 0.00419 F1 mg/L 8 82 - 130 Lab Sample ID: 680-196438-1 MSD Matrix: Water Analysis Batch: 350778 Analyte Client Sample ID: Out005-13-2-050 Prep Type: Total/NA Sample Sample Spike MSD MSD %Rec. RPD Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Cyanide, Free <0.00079 F1 0.0500 0.00433 F1 mg/L 9 82 - 130 3 11 Method: SM 5210B - BOD, 5-Day Lab Sample ID: USB 680-660304/1 Matrix: Water Analysis Batch: 660304 Analyte USB USB Result Qualifier RL Client Sample ID: Method Blank Prep Type: Total/NA RL Unit D Prepared Analyzed Dil Fac Biochemical Oxygen Demand <2.0 Lab Sample ID: LCS 680-660304/2 Matrix: Water Analysis Batch: 660304 Analyte 2.0 2.0 mg/L 03/18/21 19:10 1 Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Biochemical Oxygen Demand Lab Sample ID: LCSD 680-660304/3 Matrix: Water Analysis Batch: 660304 Analyte 198 185 mg/L 93 85 - 115 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Spike LCSD LCSD %Rec. RPD Added Result Qualifier Unit D %Rec Limits RPD Limit Biochemical Oxygen Demand 198 131 *- *1 mg/L 66 85. 115 34 30 Eurofins TestAmerica, Savannah Page 11 of 23 3/26/2021 QC Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-196438-1 Method: SM 5210B - BOD, 5-Day (Continued) rLab Sample ID: 680-196438-1 DU Matrix: Water Analysis Batch: 660304 LAnalyte Client Sample ID: Out005-13-2-050 Prep Type: Total/NA Sample Sample DU DU RPD Result Qualifier Result Qualifier Unit D RPD Limit Biochemical Oxygen Demand <2.0 *- *1 <2.0 *- *1 mg/L NC 30 Eurofins TestAmerica, Savannah Page 12 of 23 3/26/2021 Client: Civil & Environmental Consultants Inc QC Association Summary Job ID: 680-196438-1 HPLC/IC Analysis Batch: 660756 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 680-196438-1 MB 680-660756/33 LCS 680-660756/34 LCSD 680-660756/35 680-196438-1 MS 680-196438-1 MSD Out005-13-2-050 Method Blank Lab Control Sample Lab Control Sample Dup Out005-13-2-050 Out005-13-2-050 Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Water Water Water Water Water Water 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 Metals Prep Batch: 660466 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 680-196438-1 MB 680-660466/1-A LCS 680-660466/2-A Analysis Batch: 661019 Lab Sample ID Out005-13-2-050 Method Blank Lab Control Sample Client Sample ID Total/NA Total/NA Total/NA Prep Type Water Water Water Matrix 200.7-1994 R4.4 200.7-1994 R4.4 200.7-1994 R4.4 Method Prep Batch 680-196438-1 MB 680-660466/1-A LCS 680-660466/2-A Out005-13-2-050 Method Blank Lab Control Sample Total/NA Total/NA Total/NA Water Water Water 200.7 Rev 4.4 200.7 Rev 4.4 200.7 Rev 4.4 660466 660466 660466 General Chemistry Analysis Batch: 107202 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 680-196438-1 MB 410-107202/17 MB 410-107202/47 LCS 410-107202/16 LCS 410-107202/46 Analysis Batch: 350778 Lab Sample ID Out005-13-2-050 Method Blank Method Blank Lab Control Sample Lab Control Sample Client Sample ID Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Prep Type Matrix D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 Method Prep Batch 680-196438-1 MB 180-350778/21 LCS 180-350778/20 680-196438-1 MS 680-196438-1 MSD Analysis Batch: 660304 Lab Sample ID Out005-13-2-050 Method Blank Lab Control Sample Out005-13-2-050 Out005-13-2-050 Client Sample ID Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Prep Type Matrix OIA-1677 OIA-1677 OIA-1677 OIA-1677 OIA-1677 Method Prep Batch 680-196438-1 USB 680-660304/1 LCS 680-660304/2 LCSD 680-660304/3 680-196438-1 DU Prep Batch: 660390 Lab Sample ID Out005-13-2-050 Method Blank Lab Control Sample Lab Control Sample Dup Out005-13-2-050 Client Sample ID Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Prep Type Matrix SM 5210B SM 5210B SM 5210B SM 5210B SM 5210B Method Prep Batch 680-196438-1 MB 680-660390/1-A Out005-13-2-050 Method Blank Total/NA Water Total/NA Water 4500 NH3 B-2011 4500 NH3 B-2011 Eurofins TestAmerica, Savannah Page 13 of 23 3/26/2021 Client: Civil & Environmental Consultants Inc QC Association Summary Job ID: 680-196438-1 General Chemistry (Continued) Prep Batch: 660390 (Continued) Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch LCS 680-660390/3-A Lab Control Sample Analysis Batch: 660415 Lab Sample ID Client Sample ID Total/NA Prep Type Water Matrix 4500 NH3 B-2011 Method Prep Batch 680-196438-1 0ut005-13-2-050 MB 680-660390/1-A LCS 680-660390/3-A Analysis Batch: 660730 Lab Sample ID Method Blank Lab Control Sample Client Sample ID Total/NA Total/NA Total/NA Prep Type Water Water Water Matrix 4500 NH3 G-2011 4500 NH3 G-2011 4500 NH3 G-2011 Method 660390 660390 660390 Prep Batch 680-196438-1 MB 680-660730/1 LCS 680-660730/2 LCSD 680-660730/3 Prep Batch: 661023 Lab Sample ID Out005-13-2-050 Method Blank Lab Control Sample Lab Control Sample Dup Client Sample ID Total/NA Total/NA Total/NA Total/NA Prep Type Water Water Water Water Matrix 2540 D-2011 2540 D-2011 2540 D-2011 2540 D-2011 Method Prep Batch 680-196438-1 MB 680-661023/1-A LCS 680-661023/2-A LCSD 680-661023/3-A Analysis Batch: 661083 Lab Sample ID Out005-13-2-050 Method Blank Lab Control Sample Lab Control Sample Dup Client Sample ID Total/NA Total/NA Total/NA Total/NA Prep Type Water Water Water Water Matrix 1664B 1664B 1664B 1664B Method Prep Batch 680-196438-1 MB 680-661023/1-A LCS 680-661023/2-A LCSD 680-661023/3-A Out005-13-2-050 Method Blank Lab Control Sample Lab Control Sample Dup Total/NA Total/NA Total/NA Total/NA Water Water Water Water 1664B 1664B 1664B 1664B 661023 661023 661023 661023 Eurofins TestAmerica, Savannah Page 14 of 23 3/26/2021 Lab Chronicle Client Sample ID: Out005-13-2-050 Date Collected: 03/17/21 11:30 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-1 Matrix: Water Prep Type Batch Batch Dil Initial Final Batch Prepared Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 660756 03/22/21 19:56 UI TAL SAV Instrument ID: CICK Total/NA Prep 200.7-1994 R4.4 50 mL 50 mL 660466 03/19/21 14:01 BCB TAL SAV Total/NA Analysis 200.7 Rev 4.4 1 661019 03/23/21 16:20 BCB TAL SAV Instrument ID: ICPE Total/NA Prep 1664B 493 mL 500 mL 661023 03/24/21 08:04 JAS TAL SAV Total/NA Analysis 1664B 1 661083 03/24/21 10:17 JAS TAL SAV Instrument ID: NoEquip Total/NA Analysis 2540 D-2011 1 1000 mL 1000 mL 660730 03/22/21 10:36 MS TAL SAV Instrument ID: NOEQUIP Total/NA Prep 4500 NH3 B-2011 6 mL 6 mL 660390 03/19/21 10:00 DR TAL SAV Total/NA Analysis 4500 NH3 G-2011 1 2 mL 2 mL 660415 03/19/21 11:00 DR TAL SAV Instrument ID: KONELAB1 Total/NA Analysis D7511-12 1 107202 03/23/21 17:27 UJE2 ELLE Instrument ID: 19369 Total/NA Total/NA Analysis OIA-1677 1 350778 03/24/21 21:27 GRB TAL PIT Instrument ID: ALPKEM3 Analysis SM 5210B 1 300 mL 300 mL 660304 03/18/21 19:44 CMR TAL SAV Instrument ID: BODAssay+ Laboratory References: ELLE = Eurofins Lancaster Laboratories Env, LLC, 2425 New Holland Pike, Lancaster, PA 17601, TEL (717)656-2300 TAL PIT = Eurofins TestAmerica, Pittsburgh, 301 Alpha Drive, RIDC Park, Pittsburgh, PA 15238, TEL (412)963-7058 TAL SAV = Eurofins TestAmerica, Savannah, 5102 LaRoche Avenue, Savannah, GA 31404, TEL (912)354-7858 Eurofins TestAmerica, Savannah Page 15 of 23 3/26/2021 0) N Chain of Custody Record 0 1) Csi 5102 LaRoche Avenue cp (0 o N O co U Page Page 1 ofa o Preservation Codes: A - HCL M - Hexane B -NaOH N - None C - Zn Acetate 0 - AsNa02 D - Nitnc Aod P - Na2O4S E - NaHSO4 0 - Na2S03 F - Me0H R - Na2S2O3 G - Amchlor S - H2SO4 H - Ascorbic Acid T - TSP Dodecahydrate I - Ice U - Acetone J - DI Water V - MCAA K - EDTA W • pH 4-5 L - EDA Z - other (specify) Other: i.6 z c o «� R111111111111 ,,,E),11 \ i Sample Disposal (A fee may be assessed if samples are retained longer than 1 month) Return To Client Disposal By Lab Archive For Months Special Instructions/CC Requirements 'Empty Kit Relinquished by. IDate lime 'Method of Shipment a U_ SP A 4 0 a 0 Coder Temperatures) °C and Other Remarks 1 '� ' f •� Apo sn3 ao wey3 8EV961-089 ' T ^ r % 1 —(0 to , ' c 0 Lamer Tracking Nolsl a 2 Analysis Requested tioulRuoa ►o ...gwnN IRol CoVi• S7221 y0LhL%d0109 d12i, jl &QIQ/ 14d1-)ohob Received y 13) rt hFOb >C k2n L 1ia) kX x X X 7L,7*- Lab PM Hoffman, Sheila B E-Mail Sheila Hoffman@Eurofinset com ITT 1:'?''° '' r'O-1-3.--6 I i 5 L 0 ?( x)( )l-. X.. `. X ssi - ao99z z 9.009-9OLz9 z -.)1 ,0 9 110. arm u,X.� WnuIWnlV - VM0 L'OOZ t] X quoWWV-0-CHNO099WS h ' 7 .., . ... , . _..r HpdR'9f�A) o U Company 0 U Custody Seals Intact 'Custody Seal No n Yes A No O a: aldwsg (ON .1046 MINN PIMA Possible Hazard Identification ` I Non -Hazard I 1 Flammable Skin Irritant I Poison B I Unknown Radiological Deliverable Requested' I, II, III, IV, Other (specify) a Due Date Requested: TAT Requested (days): [Compliance Project: T Yes t No PO — I Purchase Order Requested Project # 68025248 Matrixte (w-war. s•.oia. o•wa.riou Y. eT•T•ue, A•AH) i, Water i/ / Sampler Ali . O 0 � a O ACO a a a o A E a3 h~�� Q 1 o CAS 0 0 a Company Civil & Environmental Consultants Inc 1d E � — CC]C'b� ��� O ) p 3 Wrs&I— E y ' _ i i C2 C� Ct� _ , C� i`� 1 Ch A t'� c�' S Client Information• Client Contact Matt Ginther Address 3701 Arco Corporate Drive Suite 400 City Charlotte Stale. Zip NC, 28273 a Email mginther@cecinc.com Protect Name boo-a(g.00l3 n� Sample Identification Out005-13-2.050 v §\1-.' 9 LI,1i 4 i �U. cia �.� a � CI Q i co2 t t'\ �) Relinquished by / { /, - r. r - s Page 16 of 23 3/26/2021 Charlotte 229 Chain of Custody Record COC No 680-123943-46437.1 Page Page of 2 Da Preservation Codes: A - I-ICL M Hexane B -NaOH N - None C Zn Acetate 0 - AsNa02 D - Ndnc Acid P - Na204S E - NaHSO4 Q - Na2S03 F - Me0H R - Na2S203 G • Amchlor S • H2SO4 H • Ascorbic Acid T - TSP Dodecahydrate I - Ice U - Acetone J DI Water V - MCAA K -EDTA W-pH4-5 L - EDA Z - otter (specify) Other � zs VfU' u) I Sample Disposal (A fee may b9 assessed if samples are retained longer than 1 month) Return To Client Disposal By Lab Archive For Months Special Instructions/QC Requirements ..r I TICompany Custody Seals Intact 'Custody Seal No Cooer Temperatures) `C and Other Remarks \ `� AYes ANo 11 li r Career Tracking No(s) State of Ongin Analysis Requested sJeulquoo jo JiQwnN IRol ; yII1 l I — III (nlikv)Nv viv l;"^t/ 4L9 l 4Y-1-0 'Empty Kit Relinquished by (Date ITlme (Method of $ •, '' ` ill Company ./`_„T L f 111115 k) %-,w- u c)z. c >, III 4(r4 LA Q•QQc k AI — Lab PM (Hoffman, Sheila B CB w ? L w � Auuawual-.«oo z ue-as m oPW�06 opi m U aen-dr3T-vON z 111111111111 (ON JO $.A) OSW/SW 1d c E_ (ON JO SOA) sldweS P.'.w PIMA Preservation Code: Possible Hazard Identification Non -Hazard I I Flammable Skin lrrrtant 1 Poison 8 U Unknown I I Radiological Deliverable Requested I, II, III. IV, Other (specify) Due Date Requested: TAT Requested (days): (Compliance Project: ' Yes A No PO# Purchase Order Requested Project # 68025248 Matrix (W-water, s•.aa. o•wswra. BT•T Sue. MAtr) _ da 60 QI a n c � rn~UC7 Company Civil & Environmental Consultants Inc to H` ' ` • +EIRE Sample Date r III Address 2704 Cherokee Farm Way Suite 101 City Knoxville State. Zip. TN, 37920 s ( Email mworden@cecinc.com Project Name 300-226.0013 �� d d cn Sample Identification ; O mo . it • ( •o 1 lbab0° Ct 1� 1 ow . 1 cp 1 c) ik I Z °NI Client Information Client Contact Michael Worden -1 .' • 71 Y = Page 17 of 23 3/26/2021 Login Sample Receipt Checklist Client: Civil & Environmental Consultants Inc Job Number: 680-196438-1 Login Number: 196438 List Number: 1 Creator: Daughtry, Beth A Question List Source: Eurofins TestAmerica, Savannah Answer Comment Radioactivity wasn't checked or is </= background as measured by a survey N/A meter. The cooler's custody seal, if present, is intact. True Sample custody seals, if present, are intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable. True Cooler Temperature is recorded. True COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True Is the Field Sampler's name present on COC? True There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True Sample Preservation Verified. True There is sufficient vol. for all requested analyses, incl. any requested True MS/MSDs Containers requiring zero headspace have no headspace or bubble is True <6mm (1/4"). Multiphasic samples are not present. True Samples do not require splitting or compositing. True Residual Chlorine Checked. N/A Eurofins TestAmerica, Savannah Page 18 of 23 3/26/2021 Login Sample Receipt Checklist Client: Civil & Environmental Consultants Inc Job Number: 680-196438-1 Login Number: 196438 List Number: 2 Creator: Phillips, Ann -Marie E Question List Source: Eurofins Lancaster Laboratories Env Answer Comment Radioactivity wasn't checked or is </= background as measured by a survey N/A meter. The cooler's custody seal is intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable (</=6C, not frozen). True Cooler Temperature is recorded. True WV: Container Temperature is acceptable (</=6C, not frozen). N/A WV: Container Temperature is recorded. N/A COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True There is sufficient vol. for all requested analyses. True Multiphasic samples are not present. True Samples do not require splitting or compositing. N/A Is the Field Sampler's name present on COC? True Sample Preservation Verified. N/A Residual Chlorine Checked. N/A Sample custody seals are intact. N/A Eurofins TestAmerica, Savannah Page 19 of 23 3/26/2021 Login Sample Receipt Checklist Client: Civil & Environmental Consultants Inc Job Number: 680-196438-1 Login Number: 196438 List Number: 4 Creator: Miller, Wesley R Question List Source: Eurofins Lancaster Laboratories Env List Creation: 03/20/21 03:04 PM Answer Comment Radioactivity wasn't checked or is </= background as measured by a survey N/A meter. The cooler's custody seal is intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable (</=6C, not frozen). True Cooler Temperature is recorded. True WV: Container Temperature is acceptable (</=6C, not frozen). N/A WV: Container Temperature is recorded. N/A COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True There is sufficient vol. for all requested analyses. True Multiphasic samples are not present. True Samples do not require splitting or compositing. N/A Is the Field Sampler's name present on COC? False Sample Preservation Verified. N/A Residual Chlorine Checked. N/A Sample custody seals are intact. N/A Received project as a subcontract. Eurofins TestAmerica, Savannah Page 20 of 23 3/26/2021 Login Sample Receipt Checklist Client: Civil & Environmental Consultants Inc Job Number: 680-196438-1 Login Number: 196438 List Number: 3 Creator: Kovitch, Christina M Question List Source: Eurofins TestAmerica, Pittsburgh List Creation: 03/18/21 07:31 PM Answer Comment Radioactivity wasn't checked or is </= background as measured by a survey N/A meter. The cooler's custody seal, if present, is intact. True Sample custody seals, if present, are intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable. True Cooler Temperature is recorded. True COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True Is the Field Sampler's name present on COC? True There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True Sample Preservation Verified. True There is sufficient vol. for all requested analyses, incl. any requested True MS/MSDs Containers requiring zero headspace have no headspace or bubble is True <6mm (1/4"). Multiphasic samples are not present. True Samples do not require splitting or compositing. True Residual Chlorine Checked. N/A Eurofins TestAmerica, Savannah Page 21 of 23 3/26/2021 Accreditation/Certification Summary Client: Civil & Environmental Consultants Inc Job ID: 680-196438-1 Laboratory: Eurofins TestAmerica, Savannah The accreditations/certifications listed below are applicable to this report. Authority Program Identification Number Expiration Date North Carolina (WW/SW) State 269 12-31-21 Laboratory: Eurofins Lancaster Laboratories Env, LLC All accreditations/certifications held by this laboratory are listed. Not all accreditations/certifications are applicable to this report. Authority Program Identification Number Expiration Date A2LA Dept. of Defense ELAP 1.01 11-30-22 Alaska State PA00009 06-30-21 Alaska (UST) State 17-027 01-31-21 * Arizona State AZ0780 03-12-22 Arkansas DEQ State 19-053-0 08-09-21 California State 2792 01-31-22 Colorado State PA00009 06-30-21 Connecticut State PH-0746 06-30-21 DE Haz. Subst. Cleanup Act (HSCA) State 019-006 (PA cert) 01-31-22 Delaware (DW) State N/A 02-01-22 Florida NELAP E87997 07-01-21 Hawaii State N/A 01-31-22 Illinois NELAP 004559 01-31-22 Iowa State 361 03-02-22 Kansas NELAP E-10151 10-31-21 Kentucky (DW) State KY90088 01-01-22 Kentucky (UST) State 1.01 11-30-22 Kentucky (WW) State KY90088 12-31-21 Louisiana NELAP 02055 06-30-21 Maine State 2019012 03-12-22 Maryland State 100 06-30-21 Massachusetts State M-PA009 06-30-21 Michigan State 9930 01-31-22 Minnesota NELAP 042-999-487 12-31-21 Missouri State 450 01-31-22 Montana (DW) State 0098 01-01-22 Montana (UST) State 0098 01-01-22 Nebraska State NE-OS-32-17 01-31-20 * Nevada State PA000092019-3 07-31-21 New Hampshire NELAP 273019 01-10-22 New Jersey NELAP PA011 06-30-21 New York NELAP 10670 04-01-21 North Carolina (DW) State 42705 07-31-21 North Carolina (WW/SW) State 521 12-31-21 North Dakota State R-205 01-31-22 Oklahoma NELAP R-205 08-31-21 Oregon NELAP PA200001-018 09-12-21 PALA Canada 1978 05-08-21 Pennsylvania NELAP 36-00037 01-31-22 Rhode Island State LA000338 01-31-22 South Carolina State 89002002 01-31-22 Tennessee State 02838 01-31-22 Texas NELAP T104704194-20-38 08-31-21 Utah NELAP PA000092019-16 03-01-22 Vermont State VT - 36037 10-29-21 * Accreditation/Certification renewal pending - accreditation/certification considered valid. Eurofins TestAmerica, Savannah Page 22 of 23 3/26/2021 Accreditation/Certification Summary Client: Civil & Environmental Consultants Inc Job ID: 680-196438-1 Laboratory: Eurofins Lancaster Laboratories Env, LLC (Continued) All accreditations/certifications held by this laboratory are listed. Not all accreditations/certifications are applicable to this report. Authority Program Identification Number Expiration Date Virginia NELAP 10561 06-14-21 Washington State C457 04-11-21 West Virginia (DW) State 9906 C 12-31-21 West Virginia DEP State 055 06-30-21 Wyoming State 8TMS-L 01-31-22 Wyoming (UST) A2LA 1.01 11-30-22 Laboratory: Eurofins TestAmerica, Pittsburgh The accreditations/certifications listed below are applicable to this report. Authority Program Identification Number Expiration Date North Carolina (WW/SW) State 434 12-31-21 Eurofins TestAmerica, Savannah Page 23 of 23 3/26/2021 Draft — Hydrogeological Conceptual Site Model Update — Badin Business Park 680-196438-2; Monitoring Wells EHS Support LLC LINKS Review your project results through �TotaAccesss Visit us at: www. eurofinsus.comfEnv eurofins ti Environment Testing America ANALYTICAL REPORT Eurofins TestAmerica, Savannah 5102 LaRoche Avenue Savannah, GA 31404 Tel: (912)354-7858 Laboratory Job ID: 680-196438-2 For: Civil & Environmental Consultants Inc 2704 Cherokee Farm Way Suite 101 Knoxville, Tennessee 37920 Attn: Michael Worden Authorized for release by: 3/26/2021 1:17:58 PM Sheila Hoffman, Project Manager II (912)250-0279 Sheila.Hoffman@Eurofinset.com The test results in this report meet all 2003 NELAC, 2009 TNI, and 2016 TNI requirements for accredited parameters, exceptions are noted in this report. This report may not be reproduced except in full, and with written approval from the laboratory. For questions please contact the Project Manager at the e-mail address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature. Results relate only to the items tested and the sample(s) as received by the laboratory. Method Summary Client: Civil & Environmental Consultants Inc Job ID: 680-196438-2 Method Method Description Protocol Laboratory 300.0-1993 R2.1 Anions, Ion Chromatography MCAWW TAL SAV D7511-12 Total Cyanide ASTM ELLE OIA-1677 Cyanide, Free (Flow Injection) 01 CORP TAL PIT Protocol References: ASTM = ASTM International MCAWW = "Methods For Chemical Analysis Of Water And Wastes", EPA-600/4-79-020, March 1983 And Subsequent Revisions. 01 CORP = 01 Corporation Instrument Manual. Laboratory References: ELLE = Eurofins Lancaster Laboratories Env, LLC, 2425 New Holland Pike, Lancaster, PA 17601, TEL (717)656-2300 TAL PIT = Eurofins TestAmerica, Pittsburgh, 301 Alpha Drive, RIDC Park, Pittsburgh, PA 15238, TEL (412)963-7058 TAL SAV = Eurofins TestAmerica, Savannah, 5102 LaRoche Avenue, Savannah, GA 31404, TEL (912)354-7858 Eurofins TestAmerica, Savannah Page 2 of 25 3/26/2021 Sample Summary Client: Civil & Environmental Consultants Inc Job ID: 680-196438-2 Lab Sample ID Client Sample ID Matrix Collected Received Asset ID 680-196438-2 ABF-BF005-F006 Water 03/15/21 10:30 03/18/21 15:31 680-196438-3 ABF-MW029-F006 Water 03/15/21 12:25 03/18/21 15:31 680-196438-4 ABF-MW033-F006 Water 03/15/21 13:15 03/18/21 15:31 680-196438-5 ABF-MW035-F006 Water 03/15/21 14:20 03/18/21 15:31 680-196438-6 ABF-MW037-F006 Water 03/15/21 15:40 03/18/21 15:31 680-196438-7 ABF-MW039-F006 Water 03/15/21 16:30 03/18/21 15:31 680-196438-8 ABF-MW046-F006 Water 03/16/21 16:45 03/18/21 15:31 Eurofins TestAmerica, Savannah Page 3 of 25 3/26/2021 Definitions/Glossary Client: Civil & Environmental Consultants Inc Job ID: 680-196438-2 Qualifiers HPLC/IC Qualifier Qualifier Description J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. Glossary Abbreviation These commonly used abbreviations may or may not be present in this report. G Listed under the "D" column to designate that the result is reported on a dry weight basis %R Percent Recovery CFL Contains Free Liquid CFU Colony Forming Unit CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) Dil Fac Dilution Factor DL Detection Limit (DoD/DOE) DL, RA, RE, IN Indicates a Dilution, Re -analysis, Re -extraction, or additional Initial metals/anion analysis of the sample DLC Decision Level Concentration (Radiochemistry) EDL Estimated Detection Limit (Dioxin) LOD Limit of Detection (DoD/DOE) LOQ Limit of Quantitation (DoD/DOE) MCL EPA recommended "Maximum Contaminant Level" MDA Minimum Detectable Activity (Radiochemistry) MDC Minimum Detectable Concentration (Radiochemistry) MDL Method Detection Limit ML Minimum Level (Dioxin) MPN Most Probable Number MQL Method Quantitation Limit NC Not Calculated ND Not Detected at the reporting limit (or MDL or EDL if shown) NEG Negative / Absent POS Positive / Present PQL Practical Quantitation Limit PRES Presumptive QC Quality Control RER Relative Error Ratio (Radiochemistry) RL Reporting Limit or Requested Limit (Radiochemistry) RPD Relative Percent Difference, a measure of the relative difference between two points TEF Toxicity Equivalent Factor (Dioxin) TEQ Toxicity Equivalent Quotient (Dioxin) TNTC Too Numerous To Count Eurofins TestAmerica, Savannah Page 4 of 25 3/26/2021 Case Narrative Client: Civil & Environmental Consultants Inc Job ID: 680-196438-2 Job ID: 680-196438-2 Laboratory: Eurofins TestAmerica, Savannah Narrative CASE NARRATIVE Client: Civil & Environmental Consultants Inc Project: Alcoa - Groundwater & Waste Characteriza Report Number: 680-196438-2 With the exceptions noted as flags or footnotes, standard analytical protocols were followed in the analysis of the samples and no problems were encountered or anomalies observed. In addition all laboratory quality control samples were within established control limits, with any exceptions noted below. Each sample was analyzed to achieve the lowest possible reporting limit within the constraints of the method. In the event of interference or analytes present at high concentrations, samples may be diluted. For diluted samples, the reporting limits are adjusted relative to the dilution required. RECEIPT The samples were received on 03/18/2021; the samples arrived in good condition, properly preserved and on ice. The temperature of the coolers at receipt was 1.1 C. FREE CYANIDE Samples ABF-BF005-F006 (680-196438-2), ABF-MW029-F006 (680-196438-3), ABF-MW033-F006 (680-196438-4), ABF-MW035-F006 (680-196438-5), ABF-MW037-F006 (680-196438-6), ABF-MW039-F006 (680-196438-7) and ABF-MW046-F006 (680-196438-8) were analyzed for free cyanide in accordance with 1677. The samples were analyzed on 03/24/2021. No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. ANIONS BY ION CHROMATOGRAPHY (28 DAY) Samples ABF-BF005-F006 (680-196438-2), ABF-MW029-F006 (680-196438-3), ABF-MW033-F006 (680-196438-4), ABF-MW035-F006 (680-196438-5), ABF-MW037-F006 (680-196438-6), ABF-MW039-F006 (680-196438-7) and ABF-MW046-F006 (680-196438-8) were analyzed for Anions by Ion Chromatography (28 Day) in accordance with EPA Method 300.0. The samples were analyzed on 03/22/2021, 03/23/2021 and 03/25/2021. Samples ABF-MW029-F006 (680-196438-3)[5X], ABF-MW033-F006 (680-196438-4)[5X], ABF-MW037-F006 (680-196438-6)[5X], ABF-MW046-F006 (680-196438-8)[10X] and ABF-MW046-F006 (680-196438-8)[5X] required dilution prior to analysis. The reporting limits have been adjusted accordingly. No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. CYANIDE Samples ABF-BF005-F006 (680-196438-2), ABF-MW029-F006 (680-196438-3), ABF-MW033-F006 (680-196438-4), ABF-MW035-F006 (680-196438-5), ABF-MW037-F006 (680-196438-6), ABF-MW039-F006 (680-196438-7) and ABF-MW046-F006 (680-196438-8) were analyzed for cyanide in accordance with D7511-12. The samples were analyzed on 03/23/2021. Samples ABF-MW029-F006 (680-196438-3)[100X], ABF-MW033-F006 (680-196438-4)[5X], ABF-MW037-F006 (680-196438-6)[5X] and ABF-MW046-F006 (680-196438-8)[100X] required dilution prior to analysis. The reporting limits have been adjusted accordingly. No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Eurofins TestAmerica, Savannah Page 5 of 25 3/26/2021 Client Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-196438-2 Client Sample ID: ABF-BF005-F006 Date Collected: 03/15/21 10:30 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-2 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate 17 1.0 0.40 mg/L 03/22/21 18:53 1 Fluoride 1.1 0.10 0.040 mg/L 03/22/21 18:53 1 Chloride 3.1 0.50 0.20 mg/L 03/22/21 18:53 1 Bromide <0.20 0.50 0.20 mg/L 03/22/21 18:53 1 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total Cyanide, Free 0.017 0.0060 0.0020 mg/L 03/23/21 16:35 1 <0.00079 0.0020 0.00079 mg/L 03/24/21 21:32 1 Client Sample ID: ABF-MW029-F006 Date Collected: 03/15/21 12:25 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-3 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate 680 5.0 2.0 mg/L 03/22/21 22:02 5 Fluoride 13 0.50 0.20 mg/L 03/22/21 22:02 5 Chloride 26 2.5 1.0 mg/L 03/22/21 22:02 5 Bromide 1.2 J 2.5 1.0 mg/L 03/22/21 22:02 5 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total Cyanide, Free 12 0.60 0.20 mg/L 03/23/21 18:01 100 0.012 0.0020 0.00079 mg/L 03/24/21 21:33 1 Client Sample ID: ABF-MW033-F006 Date Collected: 03/15/21 13:15 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-4 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit Sulfate 28 1.0 0.40 mg/L Chloride 3.3 0.50 0.20 mg/L Bromide <0.20 0.50 0.20 mg/L Method: 300.0-1993 R2.1 - Anions, Ion Chromatography - DL Analyte Result Qualifier RL MDL Unit Fluoride 44 0.50 0.20 mg/L General Chemistry Analyte Result Qualifier RL MDL Unit Cyanide, Total 0.42 0.030 0.010 mg/L Cyanide, Free <0.00079 0.0020 0.00079 mg/L D Prepared D Prepared Analyzed Dil Fac 03/22/21 20:34 1 03/22/21 20:34 1 03/22/21 20:34 1 Analyzed Dil Fac D Prepared 03/23/21 20:41 5 Analyzed Dil Fac 03/23/21 17:49 5 03/24/21 21:35 1 Client Sample ID: ABF-MW035-F006 Lab Sample ID: 680-196438-5 Date Collected: 03/15/21 14:20 Matrix: Water Date Received: 03/18/21 15:31 r Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate 16 1.0 0.40 mg/L 03/22/21 20:46 1 Fluoride 6.3 0.10 0.040 mg/L 03/22/21 20:46 1 Eurofins TestAmerica, Savannah Page 6 of 25 3/26/2021 Client Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-196438-2 Client Sample ID: ABF-MW035-F006 Date Collected: 03/15/21 14:20 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-5 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 0 3.0 0.50 0.20 mg/L 03/22/21 20:46 1 0.21 J 0.50 0.20 mg/L 03/22/21 20:46 1 Chloride Bromide General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total 0.065 0.0060 0.0020 mg/L 03/23/21 17:23 1 Cyanide, Free <0.00079 0.0020 0.00079 mg/L 03/24/21 21:36 1 Client Sample ID: ABF-MW037-F006 Date Collected: 03/15/21 15:40 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-6 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Sulfate 100 1.0 0.40 mg/L Chloride 4.5 0.50 0.20 mg/L Bromide 0.20 J 0.50 0.20 mg/L Method: 300.0-1993 R2.1 - Anions, Ion Chromatography - DL Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 03/22/21 20:59 1 03/22/21 20:59 1 03/22/21 20:59 1 Analyzed Dil Fac Fluoride 28 0.50 0.20 mg/L General Chemistry Analyte Result Qualifier RL MDL Unit Cyanide, Total 0.21 0.030 0.010 mg/L Cyanide, Free <0.00079 0.0020 0.00079 mg/L D Prepared 03/23/21 20:54 5 Analyzed Dil Fac 03/23/21 17:51 5 03/24/21 21:38 1 Client Sample ID: ABF-MW039-F006 Date Collected: 03/15/21 16:30 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-7 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate 24 1.0 0.40 mg/L 03/22/21 21:12 1 Fluoride <0.040 0.10 0.040 mg/L 03/22/21 21:12 1 Chloride 2.6 0.50 0.20 mg/L 03/22/21 21:12 1 Bromide <0.20 0.50 0.20 mg/L 03/22/21 21:12 1 General Chemistry Analyte Cyanide, Total Cyanide, Free Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac <0.0020 0.0060 0.0020 mg/L <0.00079 0.0020 0.00079 mg/L Client Sample ID: ABF-MW046-F006 Date Collected: 03/16/21 16:45 Date Received: 03/18/21 15:31 Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit Sulfate 59 5.0 2.0 mg/L Chloride 5.9 2.5 1.0 mg/L Bromide 1.0 J 2.5 1.0 mg/L 03/23/21 17:03 1 03/24/21 21:45 1 Lab Sample ID: 680-196438-8 Matrix: Water D Prepared Analyzed Dil Fac 03/22/21 22:15 5 03/22/21 22:15 5 03/22/21 22:15 5 6 Eurofins TestAmerica, Savannah Page 7 of 25 3/26/2021 Client Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-196438-2 Client Sample ID: ABF-MW046-F006 Date Collected: 03/16/21 16:45 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-8 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography - DL Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Fluoride 88 1.0 0.40 mg/L 03/25/21 00:09 10 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total 2.9 0.60 0.20 mg/L 03/23/21 17:59 100 r Cyanide, Free <0.00079 0.0020 0.00079 mg/L 03/24/21 21:47 1 6 Eurofins TestAmerica, Savannah Page 8 of 25 3/26/2021 QC Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-196438-2 Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Lab Sample ID: MB 680-660755/2 Matrix: Water Analysis Batch: 660755 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate <0.40 1.0 0.40 mg/L 03/22/21 12:29 1 Fluoride <0.040 0.10 0.040 mg/L 03/22/21 12:29 1 Chloride <0.20 0.50 0.20 mg/L 03/22/21 12:29 1 Bromide <0.20 0.50 0.20 mg/L 03/22/21 12:29 1 Lab Sample ID: LCS 680-660755/3 Matrix: Water Analysis Batch: 660755 Analyte Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Sulfate 10.0 9.98 mg/L 100 90 - 110 Fluoride 2.00 2.05 mg/L 103 90 - 110 Chloride 10.0 9.99 mg/L 100 90 - 110 Bromide 10.0 9.87 mg/L 99 90. 110 Lab Sample ID: LCSD 680-660755/4 Matrix: Water Analysis Batch: 660755 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Spike LCSD LCSD %Rec. RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Sulfate 10.0 10.0 mg/L 100 90 _ 110 0 15 Fluoride 2.00 2.06 mg/L 103 90 _ 110 0 15 Chloride 10.0 9.99 mg/L 100 90 _ 110 0 15 Bromide 10.0 9.89 mg/L 99 90 _ 110 0 15 Lab Sample ID: MB 680-660756/33 Matrix: Water Analysis Batch: 660756 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate <0.40 1.0 0.40 mg/L 03/22/21 19:18 1 Fluoride <0.040 0.10 0.040 mg/L 03/22/21 19:18 1 Chloride <0.20 0.50 0.20 mg/L 03/22/21 19:18 1 Bromide <0.20 0.50 0.20 mg/L 03/22/21 19:18 1 Lab Sample ID: LCS 680-660756/34 Matrix: Water Analysis Batch: 660756 Analyte Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Sulfate 10.0 9.75 mg/L 98 90 - 110 Fluoride 2.00 2.04 mg/L 102 90. 110 Chloride 10.0 10.0 mg/L 100 90. 110 Bromide 10.0 9.89 mg/L 99 90 _ 110 Lab Sample ID: LCSD 680-660756/35 Matrix: Water Analysis Batch: 660756 Analyte Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Spike LCSD LCSD %Rec. RPD Added Result Qualifier Unit D %Rec Limits RPD Limit Sulfate 10.0 9.75 mg/L 98 90 _ 110 0 15 Eurofins TestAmerica, Savannah Page 9 of 25 3/26/2021 QC Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-196438-2 Method: 300.0-1993 R2.1 - Anions, Ion Chromatography (Continued) Lab Sample ID: LCSD 680-660756/35 Matrix: Water Analysis Batch: 660756 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Spike LCSD LCSD %Rec. RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Fluoride 2.00 2.05 mg/L 102 90 - 110 0 15 Chloride 10.0 10.0 mg/L 100 90 - 110 0 15 Bromide 10.0 9.87 mg/L 99 90 - 110 0 15 Lab Sample ID: MB 680-660928/2 Matrix: Water Analysis Batch: 660928 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate <0.40 1.0 0.40 mg/L 03/23/21 11:30 1 Fluoride <0.040 0.10 0.040 mg/L 03/23/21 11:30 1 Chloride <0.20 0.50 0.20 mg/L 03/23/21 11:30 1 Bromide <0.20 0.50 0.20 mg/L 03/23/21 11:30 1 Lab Sample ID: LCS 680-660928/3 Matrix: Water Analysis Batch: 660928 Analyte Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Sulfate 10.0 10.0 mg/L 100 90 - 110 Fluoride 2.00 2.03 mg/L 102 90 - 110 Chloride 10.0 9.98 mg/L 100 90 - 110 Bromide 10.0 9.85 mg/L 99 90 - 110 Lab Sample ID: LCSD 680-660928/4 Matrix: Water Analysis Batch: 660928 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Spike LCSD LCSD %Rec. RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Sulfate 10.0 10.1 mg/L 101 90 - 110 1 15 Fluoride 2.00 2.05 mg/L 103 90 _ 110 1 15 Chloride 10.0 10.0 mg/L 100 90 _ 110 0 15 Bromide 10.0 9.86 mg/L 99 90 _ 110 0 15 Lab Sample ID: MB 680-661199/33 Matrix: Water Analysis Batch: 661199 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate <0.40 1.0 0.40 mg/L 03/24/21 21:37 1 Fluoride <0.040 0.10 0.040 mg/L 03/24/21 21:37 1 Chloride <0.20 0.50 0.20 mg/L 03/24/21 21:37 1 Bromide <0.20 0.50 0.20 mg/L 03/24/21 21:37 1 Lab Sample ID: LCS 680-661199/34 Matrix: Water Analysis Batch: 661199 Analyte Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Sulfate 10.0 10.0 mg/L 100 90 - 110 Fluoride 2.00 2.05 mg/L 103 90 - 110 Eurofins TestAmerica, Savannah Page 10 of 25 3/26/2021 QC Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-196438-2 Method: 300.0-1993 R2.1 - Anions, Ion Chromatography (Continued) Lab Sample ID: LCS 680-661199/34 Matrix: Water Analysis Batch: 661199 Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Chloride 10.0 10.0 mg/L 100 90 - 110 Bromide 10.0 9.88 mg/L 99 90_ 110 Lab Sample ID: LCSD 680-661199/35 Matrix: Water Analysis Batch: 661199 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Spike LCSD LCSD %Rec. RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Sulfate 10.0 10.1 mg/L 101 90_ 110 0 15 Fluoride 2.00 2.06 mg/L 103 90 _ 110 0 15 Chloride 10.0 10.0 mg/L 100 90 _ 110 0 15 Bromide 10.0 9.89 mg/L 99 90_ 110 0 15 Method: D7511-12 - Total Cyanide Lab Sample ID: MB 410-107202/17 Matrix: Water Analysis Batch: 107202 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total <0.0020 0.0060 0.0020 mg/L 03/23/21 16:07 1 Lab Sample ID: MB 410-107202/47 Matrix: Water Analysis Batch: 107202 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total <0.0020 Lab Sample ID: LCS 410-107202/16 Matrix: Water Analysis Batch: 107202 Analyte 0.0060 0.0020 mg/L 03/23/21 17:07 1 Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Cyanide, Total Lab Sample ID: LCS 410-107202/46 Matrix: Water Analysis Batch: 107202 Analyte 0.0400 0.0381 mg/L 95 84 - 116 Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Cyanide, Total 0.0300 0.0307 mg/L 102 84 - 116 Method: OIA-1677 - Cyanide, Free (Flow Injection) Lab Sample ID: MB 180-350778/21 Matrix: Water Analysis Batch: 350778 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Free <0.00079 0.0020 0.00079 mg/L 03/24/21 21:26 1 Eurofins TestAmerica, Savannah Page 11 of 25 3/26/2021 QC Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-196438-2 Method: OIA-1677 - Cyanide, Free (Flow Injection) (Continued) pLab Sample ID: LCS 180-350778/20 Matrix: Water Analysis Batch: 350778 Analyte Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Cyanide, Free 0.0500 0.0528 mg/L 106 82. 132 Eurofins TestAmerica, Savannah Page 12 of 25 3/26/2021 Client: Civil & Environmental Consultants Inc QC Association Summary Job ID: 680-196438-2 HPLC/IC Analysis Batch: 660755 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 680-196438-2 MB 680-660755/2 LCS 680-660755/3 LCSD 680-660755/4 Analysis Batch: 660756 Lab Sample ID ABF-BF005-F006 Method Blank Lab Control Sample Lab Control Sample Dup Client Sample ID Total/NA Water Total/NA Water Total/NA Water Total/NA Water Prep Type Matrix 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 Method Prep Batch 680-196438-3 680-196438-4 680-196438-5 680-196438-6 680-196438-7 680-196438-8 MB 680-660756/33 LCS 680-660756/34 LCSD 680-660756/35 Analysis Batch: 660928 Lab Sample ID ABF-MW029-F006 ABF-MW033-F006 ABF-MW035-F006 ABF-MW037-F006 ABF-MW039-F006 ABF-MW046-F006 Method Blank Lab Control Sample Lab Control Sample Dup Client Sample ID Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Prep Type Matrix 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 Method Prep Batch 680-196438-4 - DL 680-196438-6 - DL MB 680-660928/2 LCS 680-660928/3 LCSD 680-660928/4 Analysis Batch: 661199 Lab Sample ID ABF-MW033-F006 ABF-MW037-F006 Method Blank Lab Control Sample Lab Control Sample Dup Client Sample ID Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Prep Type Matrix 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 Method Prep Batch 680-196438-8 - DL MB 680-661199/33 LCS 680-661199/34 LCSD 680-661199/35 ABF-MW046-F006 Method Blank Lab Control Sample Lab Control Sample Dup Total/NA Water Total/NA Water Total/NA Water Total/NA Water 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 General Chemistry Analysis Batch: 107202 Lab Sample ID 680-196438-2 680-196438-3 680-196438-4 680-196438-5 680-196438-6 680-196438-7 680-196438-8 MB 410-107202/17 MB 410-107202/47 LCS 410-107202/16 LCS 410-107202/46 Client Sample ID Prep Type Matrix Method Analysis Batch: 350778 Lab Sample ID ABF-BF005-F006 ABF-MW029-F006 ABF-MW033-F006 ABF-MW035-F006 ABF-MW037-F006 ABF-MW039-F006 ABF-MW046-F006 Method Blank Method Blank Lab Control Sample Lab Control Sample Client Sample ID Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Prep Type Water Water Water Water Water Water Water Water Water Water Water Matrix D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 Method Prep Batch Prep Batch 680-196438-2 680-196438-3 ABF-BF005-F006 ABF-MW029-F006 Total/NA Water OIA-1677 Total/NA Water OIA-1677 Eurofins TestAmerica, Savannah Page 13 of 25 3/26/2021 QC Association Summary Client: Civil & Environmental Consultants Inc Job ID: 680-196438-2 General Chemistry (Continued) Analysis Batch: 350778 (Continued) Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 680-196438-4 ABF-MW033-F006 Total/NA Water OIA-1677 680-196438-5 ABF-MW035-F006 Total/NA Water OIA-1677 680-196438-6 ABF-MW037-F006 Total/NA Water OIA-1677 680-196438-7 ABF-MW039-F006 Total/NA Water OIA-1677 680-196438-8 ABF-MW046-F006 Total/NA Water OIA-1677 MB 180-350778/21 Method Blank Total/NA Water OIA-1677 LCS 180-350778/20 Lab Control Sample Total/NA Water OIA-1677 Eurofins TestAmerica, Savannah Page 14 of 25 3/26/2021 Lab Chronicle Client Sample ID: ABF-BF005-F006 Date Collected: 03/15/21 10:30 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-2 Matrix: Water Prep Type Batch Batch Type Method Run Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Total/NA Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 660755 03/22/21 18:53 UI TAL SAV Instrument ID: CICK Analysis D7511-12 1 107202 03/23/21 16:35 UJE2 ELLE Instrument ID: 19369 Analysis OIA-1677 1 350778 03/24/21 21:32 GRB TAL PIT Instrument ID: ALPKEM3 Client Sample ID: ABF-MW029-F006 Date Collected: 03/15/21 12:25 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-3 Matrix: Water Prep Type Batch Batch Type Method Run Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Total/NA Total/NA Analysis 300.0-1993 R2.1 5 5 mL 5 mL 660756 03/22/21 22:02 Ul TAL SAV Instrument ID: CICK Analysis D7511-12 100 107202 03/23/21 18:01 UJE2 ELLE Instrument ID: 19369 Analysis OIA-1677 1 350778 03/24/21 21:33 GRB TAL PIT Instrument ID: ALPKEM3 Client Sample ID: ABF-MW033-F006 Date Collected: 03/15/21 13:15 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-4 Matrix: Water Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 660756 03/22/21 20:34 Ul TAL SAV Instrument ID: CICK Total/NA Analysis 300.0-1993 R2.1 DL 5 5 mL 5 mL 660928 03/23/21 20:41 T1C TAL SAV Instrument ID: CICK Total/NA Analysis D7511-12 5 107202 03/23/21 17:49 UJE2 ELLE Instrument ID: 19369 Total/NA Analysis OIA-1677 1 350778 03/24/21 21:35 GRB TAL PIT Instrument ID: ALPKEM3 Client Sample ID: ABF-MW035-F006 Date Collected: 03/15/21 14:20 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-5 Matrix: Water Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 660756 03/22/21 20:46 UI TAL SAV Instrument ID: LICK Total/NA Analysis D7511-12 1 107202 03/23/21 17:23 UJE2 ELLE Instrument ID: 19369 Total/NA Analysis OIA-1677 1 350778 03/24/21 21:36 GRB TAL PIT Instrument ID: ALPKEM3 Eurofins TestAmerica, Savannah Page 15 of 25 3/26/2021 Lab Chronicle Client Sample ID: ABF-MW037-F006 Date Collected: 03/15/21 15:40 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-6 Matrix: Water Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 660756 03/22/21 20:59 UI TAL SAV Instrument ID: CICK Total/NA Analysis 300.0-1993 R2.1 DL 5 5 mL 5 mL 660928 03/23/21 20:54 T1C TAL SAV Instrument ID: CICK Total/NA Analysis D7511-12 5 107202 03/23/21 17:51 UJE2 ELLE Instrument ID: 19369 Total/NA Analysis OIA-1677 1 350778 03/24/21 21:38 GRB TAL PIT Instrument ID: ALPKEM3 Client Sample ID: ABF-MW039-F006 Date Collected: 03/15/21 16:30 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-7 Matrix: Water Prep Type Batch Batch Type Method Run Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Total/NA Total/NA Analysis 300.0-1993 R2.1 Instrument ID: CICK Analysis D7511-12 Instrument ID: 19369 Analysis OIA-1677 Instrument ID: ALPKEM3 1 5 mL 1 1 5 mL 660756 03/22/21 21:12 Ul TAL SAV 107202 03/23/21 17:03 UJE2 ELLE 350778 03/24/21 21:45 GRB TAL PIT Client Sample ID: ABF-MW046-F006 Date Collected: 03/16/21 16:45 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-8 Matrix: Water Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis 300.0-1993 R2.1 5 5 mL 5 mL 660756 03/22/21 22:15 Ul TAL SAV Instrument ID: CICK Total/NA Analysis 300.0-1993 R2.1 DL 10 5 mL 5 mL 661199 03/25/21 00:09 UI TAL SAV Instrument ID: CICK Total/NA Analysis D7511-12 100 107202 03/23/21 17:59 UJE2 ELLE Instrument ID: 19369 Total/NA Analysis OIA-1677 1 350778 03/24/21 21:47 GRB TAL PIT Instrument ID: ALPKEM3 Laboratory References: ELLE = Eurofins Lancaster Laboratories Env, LLC, 2425 New Holland Pike, Lancaster, PA 17601, TEL (717)656-2300 TAL PIT = Eurofins TestAmerica, Pittsburgh, 301 Alpha Drive, RIDC Park, Pittsburgh, PA 15238, TEL (412)963-7058 TAL SAV = Eurofins TestAmerica, Savannah, 5102 LaRoche Avenue, Savannah, GA 31404, TEL (912)354-7858 Eurofins TestAmerica, Savannah Page 16 of 25 3/26/2021 0) N r r Chain of Custody Record 0 Ln 1) 5102 LaRoche Avenue I. o N O (0 U Page Page 1 ofa o Preservation Codes: A - HCL M - Hexane B -NaOH N - None C - Zn Acetate 0 - AsNa02 D - Nitnc Aod P - Na2O4S E - NaHSO4 0 - Na2S03 F - Me0H R - Na2S2O3 G - Amchlor S - H2SO4 H - Ascorbic Acid T - TSP Dodecahydrate I - Ice U - Acetone J - DI Water V - MCAA K - EDTA W • pH 4-5 L - EDA Z - other (specify) Other: la o V «� yup R111111111 rH Sample Disposal (A fee may be assessed if samples are retained longer than 1 month) Return To Client Disposal By Lab Archive For Months Special Instructions/CC Requirements 'Empty Kit Relinquished by. IDate lime 'Method of Shipment o U_ SP A E 0 n E U Coder Temperatures) °C and Other Remarks 1 '� ' f •� Apo sn3 ao wey3 8CP961-089 11 ^ 'T T-- r % f —, 0\ ' z Lamer Tracking Nolsl a 2 N Analysis Requested tioulRuoa ►o ...gwnN IRol Co,e/ S1'2 l yOLhL f d0100 8- j 1. x &QI0/ 14d1-)ohob Received y 13) rt rr vho 7 if LLB 1 60 1\r•TDA kX *� 7G X 71, 4-. x Lab PM Hoffman, Sheila B E-Mail Sheila Hoffman@Eurofinset com 43 Ii5L.0 "riit13 r°ia-1. 0 '00c )( )( 7" X1-, X x k ssi-aonz z 9-00e - 8OI.z9 z •aea0 V 110 • arm N x WnuIWnlV - VMO L'OOZ t] X wuowwV-'J-CHNOO9WdS h ' 7 _ .., . ... R, . ,_0 Hpd�i) ,- ,it o U Company 0 U Custody Seals Intact 'Custody Seal No L Yes A No (ON aO Njj aldw'S MINN PIMA Possible Hazard Identification ` I Non -Hazard I 1 Flammable Skin Irritant I Poison B I Unknown Radiological Deliverable Requested' I, II, III, IV, Other (specify) a Due Date Requested: TAT Requested (days): [Compliance Project: T Yes t No PO — I Purchase Order Requested Project # 68025248 Matrix (w•warar. s•aoiw. o•waariou. BT•Tbaua, A•AH) Water '-') Sampler O 0 !-' 2 a 0� 0 . a E a u" h~i;� E Q _ o r 0 0 a �- Company Civil & Environmental Consultants Inc id — 0 _ __Z, u 3 E toC2 i C. Cn , C� �'� 1 Ch t'n M Client Information• Client Contact Matt Ginther Address 3701 Arco Corporate Drive Suite 400 City Charlotte Stale. Zip NC, 28273 a Email mginther@cecinc.com Protect Name boo- (9.00l3 Sample Identification Out005-13-2.050 SI 0 O�Q §N1-.1 0 0 . O41` 0 St•.� ,a` '3 —a t , Relinquished by / { /, - at r m Page 17 of 25 3/26/2021 Charlotte 229 Chain of Custody Record COC No 680-123943-46437.1 Page Page of 2 Da Preservation Codes: A - I-ICL M Hexane B -NaOH N - None C Zn Acetate 0 - AsNa02 D - Ndnc Acid P - Na204S E - NaHSO4 Q - Na2S03 F - Me0H R - Na2S203 G • Amchlor S • H2SO4 H • Ascorbic Acid T - TSP Dodecahydrate I - Ice U - Acetone J DI Water V - MCAA K -EDTA W-pH4-5 L - EDA Z - otter (specify) Other � zs VfU' u) I Sample Disposal (A fee may b9 assessed if samples are retained longer than 1 month) Return To Client Disposal By Lab Archive For Months Special Instructions/QC Requirements ..r I TICompany Custody Seals Intact 'Custody Seal No Cooer Temperatures) `C and Other Remarks \ `� AYes ANo 11 li r Career Tracking No(s) State of Ongin Analysis Requested sJeulquoo jo JiQwnN IRol ; yII1 l I — III (nlikv)Nv viv l;"^t/ 4L9 l 4Y-1-0 'Empty Kit Relinquished by (Date ITlme (Method of $ •, '' ` ill Company ./`_„T L f 111115 k) %-,w- u c)z. c >, III 4(r4 LA Q•QQc k AI — Lab PM (Hoffman, Sheila B CB w ? L w � Auuawual-.«oo z ue-as m oPW�06 opi m U aen-dr3T-vON z 111111111111 (ON JO $.A) OSW/SW 1d c E_ (ON JO SOA) sldweS P.'.w PIMA Preservation Code: Possible Hazard Identification Non -Hazard I I Flammable Skin lrrrtant 1 Poison 8 U Unknown I I Radiological Deliverable Requested I, II, III. IV, Other (specify) Due Date Requested: TAT Requested (days): (Compliance Project: ' Yes A No PO# Purchase Order Requested Project # 68025248 Matrix (W-water, s•.aa. o•wswra. BT•T Sue. MAtr) _ da 60 QI a n c � rn~UC7 Company Civil & Environmental Consultants Inc to H` ' ` • +EIRE Sample Date r III Address 2704 Cherokee Farm Way Suite 101 City Knoxville State. Zip. TN, 37920 s ( Email mworden@cecinc.com Project Name 300-226.0013 �� d d cn Sample Identification ; O mo . it • ( •o 1 % Ct 1� 1 0 ow . 1 0 cp 1 ° c) ik I Z °NI Client Information Client Contact Michael Worden -1 .' • Y = Page 18 of 25 3/26/2021 0 QJ Chain of Custody Record COC No j 680-647348 1 N & al N a' d !Job a 680-196438-1 Preservation Codes: A - HCL M - Hexane B - NaOH N - None C - Zn Acetate 0 - AsNaO2 D - Nitric Acid P - Na2O4S E - NaHSO4 0 - Na2S03 F -MeOH R-Na2S203 G • Amchlor S - H2SO4 H • Ascorbic Acid T - TSP Dodecahydrate I - Ice U - Acetone J • DI Water V - MCAA K • EDTA W - pH 4.5 L - EDA Z • other (specuh. Other: Special Instructions/Note: Note Since laboratory accreddahons are subject to change. Eurofins TestAmenca places the ownership of method analyle 8 accreditation compliance upon out subcontract laboratories This sample shipment is forwarded under chain -of -custody If the laboratory does not currently maintain accreditation in the State of Origin listed above for analysis/tests/matrix being analyzed. the samples must be shipped back to the Eurofins TestAmenca laboratory or other instructions wdl be provided Any changes to accreditation status should be brought to Eurofins TestAmenca attention immediately If alt requested accreditation are current to date. return the signed Chain of Custody attesting to said comphcance to Eurofins TestAmenca Sample Disposal ( A fee may be assessed if samples are retained longer than 1 month) Return To Client 0 Disposal By Lab Archive For Mon. Special Instructions/QC Requirements 'Empty Kit Relinquished by. IDate. ITlme 'Method of Shipment E E 0 U E E 0 U n E 0 U Cooler Temperalurels) °C and Other Remarks v E o t m O %m m o Career Tracking NO(S) Stale of Ong° North Carolina Accreditations Required (See note) State - North Carolina (WW/SW) Analysis Requested wewquoa;o JeqwnN L5 of Received by a m d d CC Received by 1 Lab PM Hoffman. Sheila B E-Mail Sheila Hoffman@Eurofinset com dno-pasolo suai .A suad'Apimepu61 mow X (ON Jo SSA) OSW/SW uuoYedx n 0 0 o 0 U T u 0 0 (Custody Seal No (ON Jo SSA) eldw,S pueUld PIMA Possible Hazard Identification Unconfirmed Deliverable Requested 1, 11. III, IV. Other (specify) Primary Deliverable Rank 2 Company Eurofins Lancaster Laboratories Env LLC TAT Requested (days): 6rotect u 68025248 ?Lc si_ a 2 3 a; y T• _ 0 m LPreservation Code: 4.53 u0 3 Z.ogm E ]4.. u o co F- u u h V0 m dmE.'D 0 m CtQ 0 m 0 c ia ? la E o r a M v " a o w w v m K N y O N N aO U w Sample Date N (O zM Client Information (Sub Contract Lab) Client Contact Shipping/Receiving Address 2425 New Holland Pike. . 03 l0 u U J Slate Zup PA, 17601 Phone 717-656-2300(Tel) W Project Name Alcoa - Groundwater 8 Waste Characterize mN Sample Identification - Client ID (Lab ID) ABF-WC001-F006 (680-196438-9) Relinquished by Relinquished by Relinquished by Custody Seals Intact. A Yes n No 1I/01/2020 Page 19 of 25 3/26/2021 Login Sample Receipt Checklist Client: Civil & Environmental Consultants Inc Job Number: 680-196438-2 Login Number: 196438 List Number: 1 Creator: Daughtry, Beth A Question List Source: Eurofins TestAmerica, Savannah Answer Comment Radioactivity wasn't checked or is </= background as measured by a survey N/A meter. The cooler's custody seal, if present, is intact. True Sample custody seals, if present, are intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable. True Cooler Temperature is recorded. True COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True Is the Field Sampler's name present on COC? True There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True Sample Preservation Verified. True There is sufficient vol. for all requested analyses, incl. any requested True MS/MSDs Containers requiring zero headspace have no headspace or bubble is True <6mm (1/4"). Multiphasic samples are not present. True Samples do not require splitting or compositing. True Residual Chlorine Checked. N/A Eurofins TestAmerica, Savannah Page 20 of 25 3/26/2021 Login Sample Receipt Checklist Client: Civil & Environmental Consultants Inc Job Number: 680-196438-2 Login Number: 196438 List Number: 2 Creator: Phillips, Ann -Marie E Question List Source: Eurofins Lancaster Laboratories Env Answer Comment Radioactivity wasn't checked or is </= background as measured by a survey N/A meter. The cooler's custody seal is intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable (</=6C, not frozen). True Cooler Temperature is recorded. True WV: Container Temperature is acceptable (</=6C, not frozen). N/A WV: Container Temperature is recorded. N/A COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True There is sufficient vol. for all requested analyses. True Multiphasic samples are not present. True Samples do not require splitting or compositing. N/A Is the Field Sampler's name present on COC? True Sample Preservation Verified. N/A Residual Chlorine Checked. N/A Sample custody seals are intact. N/A Eurofins TestAmerica, Savannah Page 21 of 25 3/26/2021 Login Sample Receipt Checklist Client: Civil & Environmental Consultants Inc Job Number: 680-196438-2 Login Number: 196438 List Number: 4 Creator: Miller, Wesley R Question List Source: Eurofins Lancaster Laboratories Env List Creation: 03/20/21 03:04 PM Answer Comment Radioactivity wasn't checked or is </= background as measured by a survey N/A meter. The cooler's custody seal is intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable (</=6C, not frozen). True Cooler Temperature is recorded. True WV: Container Temperature is acceptable (</=6C, not frozen). N/A WV: Container Temperature is recorded. N/A COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True There is sufficient vol. for all requested analyses. True Multiphasic samples are not present. True Samples do not require splitting or compositing. N/A Is the Field Sampler's name present on COC? False Sample Preservation Verified. N/A Residual Chlorine Checked. N/A Sample custody seals are intact. N/A Received project as a subcontract. Eurofins TestAmerica, Savannah Page 22 of 25 3/26/2021 Login Sample Receipt Checklist Client: Civil & Environmental Consultants Inc Job Number: 680-196438-2 Login Number: 196438 List Number: 3 Creator: Kovitch, Christina M Question List Source: Eurofins TestAmerica, Pittsburgh List Creation: 03/18/21 07:31 PM Answer Comment Radioactivity wasn't checked or is </= background as measured by a survey N/A meter. The cooler's custody seal, if present, is intact. True Sample custody seals, if present, are intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable. True Cooler Temperature is recorded. True COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True Is the Field Sampler's name present on COC? True There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True Sample Preservation Verified. True There is sufficient vol. for all requested analyses, incl. any requested True MS/MSDs Containers requiring zero headspace have no headspace or bubble is True <6mm (1/4"). Multiphasic samples are not present. True Samples do not require splitting or compositing. True Residual Chlorine Checked. N/A Eurofins TestAmerica, Savannah Page 23 of 25 3/26/2021 Accreditation/Certification Summary Client: Civil & Environmental Consultants Inc Job ID: 680-196438-2 Laboratory: Eurofins TestAmerica, Savannah The accreditations/certifications listed below are applicable to this report. Authority Program Identification Number Expiration Date North Carolina (WW/SW) State 269 12-31-21 Laboratory: Eurofins Lancaster Laboratories Env, LLC All accreditations/certifications held by this laboratory are listed. Not all accreditations/certifications are applicable to this report. Authority Program Identification Number Expiration Date A2LA Dept. of Defense ELAP 1.01 11-30-22 Alaska State PA00009 06-30-21 Alaska (UST) State 17-027 01-31-21 * Arizona State AZ0780 03-12-22 Arkansas DEQ State 19-053-0 08-09-21 California State 2792 01-31-22 Colorado State PA00009 06-30-21 Connecticut State PH-0746 06-30-21 DE Haz. Subst. Cleanup Act (HSCA) State 019-006 (PA cert) 01-31-22 Delaware (DW) State N/A 02-01-22 Florida NELAP E87997 07-01-21 Hawaii State N/A 01-31-22 Illinois NELAP 004559 01-31-22 Iowa State 361 03-02-22 Kansas NELAP E-10151 10-31-21 Kentucky (DW) State KY90088 01-01-22 Kentucky (UST) State 1.01 11-30-22 Kentucky (WW) State KY90088 12-31-21 Louisiana NELAP 02055 06-30-21 Maine State 2019012 03-12-22 Maryland State 100 06-30-21 Massachusetts State M-PA009 06-30-21 Michigan State 9930 01-31-22 Minnesota NELAP 042-999-487 12-31-21 Missouri State 450 01-31-22 Montana (DW) State 0098 01-01-22 Montana (UST) State 0098 01-01-22 Nebraska State NE-OS-32-17 01-31-20 * Nevada State PA000092019-3 07-31-21 New Hampshire NELAP 273019 01-10-22 New Jersey NELAP PA011 06-30-21 New York NELAP 10670 04-01-21 North Carolina (DW) State 42705 07-31-21 North Carolina (WW/SW) State 521 12-31-21 North Dakota State R-205 01-31-22 Oklahoma NELAP R-205 08-31-21 Oregon NELAP PA200001-018 09-12-21 PALA Canada 1978 05-08-21 Pennsylvania NELAP 36-00037 01-31-22 Rhode Island State LA000338 01-31-22 South Carolina State 89002002 01-31-22 Tennessee State 02838 01-31-22 Texas NELAP T104704194-20-38 08-31-21 Utah NELAP PA000092019-16 03-01-22 Vermont State VT - 36037 10-29-21 * Accreditation/Certification renewal pending - accreditation/certification considered valid. Eurofins TestAmerica, Savannah Page 24 of 25 3/26/2021 Accreditation/Certification Summary Client: Civil & Environmental Consultants Inc Job ID: 680-196438-2 Laboratory: Eurofins Lancaster Laboratories Env, LLC (Continued) All accreditations/certifications held by this laboratory are listed. Not all accreditations/certifications are applicable to this report. Authority Program Identification Number Expiration Date Virginia NELAP 10561 06-14-21 Washington State C457 04-11-21 West Virginia (DW) State 9906 C 12-31-21 West Virginia DEP State 055 06-30-21 Wyoming State 8TMS-L 01-31-22 Wyoming (UST) A2LA 1.01 11-30-22 Laboratory: Eurofins TestAmerica, Pittsburgh The accreditations/certifications listed below are applicable to this report. Authority Program Identification Number Expiration Date North Carolina (WW/SW) State 434 12-31-21 Eurofins TestAmerica, Savannah Page 25 of 25 3/26/2021 Draft — Hydrogeological Conceptual Site Model Update — Badin Business Park 680-196438-4; Outfall 005 System Samples EHS Support LLC LINKS Review your project results through �TotaAccesss Have a Question? j Ask ,jThe kw Ex ert Visit us at: www. eurofinsus.comfEnv eurofins ti Environment Testing America ANALYTICAL REPORT Eurofins TestAmerica, Savannah 5102 LaRoche Avenue Savannah, GA 31404 Tel: (912)354-7858 Laboratory Job ID: 680-196438-4 For: Civil & Environmental Consultants Inc 2704 Cherokee Farm Way Suite 101 Knoxville, Tennessee 37920 Attn: Michael Worden Authorized for release by: 3/26/2021 1:24:50 PM Sheila Hoffman, Project Manager II (912)250-0279 Sheila.Hoffman@Eurofinset.com The test results in this report meet all 2003 NELAC, 2009 TNI, and 2016 TNI requirements for accredited parameters, exceptions are noted in this report. This report may not be reproduced except in full, and with written approval from the laboratory. For questions please contact the Project Manager at the e-mail address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature. Results relate only to the items tested and the sample(s) as received by the laboratory. Method Summary Client: Civil & Environmental Consultants Inc Job ID: 680-196438-4 Method Method Description Protocol Laboratory 300.0-1993 R2.1 Anions, Ion Chromatography MCAWW TAL SAV D7511-12 Total Cyanide ASTM ELLE OIA-1677 Cyanide, Free (Flow Injection) 01 CORP TAL PIT Protocol References: ASTM = ASTM International MCAWW = "Methods For Chemical Analysis Of Water And Wastes", EPA-600/4-79-020, March 1983 And Subsequent Revisions. 01 CORP = 01 Corporation Instrument Manual. Laboratory References: ELLE = Eurofins Lancaster Laboratories Env, LLC, 2425 New Holland Pike, Lancaster, PA 17601, TEL (717)656-2300 TAL PIT = Eurofins TestAmerica, Pittsburgh, 301 Alpha Drive, RIDC Park, Pittsburgh, PA 15238, TEL (412)963-7058 TAL SAV = Eurofins TestAmerica, Savannah, 5102 LaRoche Avenue, Savannah, GA 31404, TEL (912)354-7858 Eurofins TestAmerica, Savannah Page 2 of 28 3/26/2021 Sample Summary Client: Civil & Environmental Consultants Inc Job ID: 680-196438-4 Lab Sample ID Client Sample ID Matrix Collected Received Asset ID 680-196438-10 680-196438-11 680-196438-12 680-196438-13 680-196438-14 680-196438-15 680-196438-16 680-196438-17 680-196438-18 680-196438-19 680-196438-20 WSPL-SEEP Out005-North Sump Out005-South Sump Out005-01-2.510 Out005-06-2.400 Out005-07-2.210 Out005-08-2.200 Out005-09-2.100 Out005-12-2.000 Out005-10-6.100 Out005-11-6.000 Water 03/16/21 14:40 03/18/21 15:31 Water 03/16/21 15:48 03/18/21 15:31 Water 03/16/21 16:35 03/18/21 15:31 Water 03/16/21 14:00 03/18/21 15:31 Water 03/17/21 09:45 03/18/21 15:31 Water 03/17/21 10:00 03/18/21 15:31 Water 03/17/21 10:20 03/18/21 15:31 Water 03/17/21 10:45 03/18/21 15:31 Water 03/17/21 11:00 03/18/21 15:31 Water 03/17/21 12:20 03/18/21 15:31 Water 03/17/21 12:40 03/18/21 15:31 Eurofins TestAmerica, Savannah Page 3 of 28 3/26/2021 Definitions/Glossary Client: Civil & Environmental Consultants Inc Job ID: 680-196438-4 Qualifiers HPLC/IC Qualifier Qualifier Description J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. General Chemistry Qualifier Qualifier Description F1 MS and/or MSD recovery exceeds control limits. F2 MS/MSD RPD exceeds control limits J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. Glossary Abbreviation These commonly used abbreviations may or may not be present in this report. Listed under the "D" column to designate that the result is reported on a dry weight basis %R Percent Recovery CFL Contains Free Liquid CFU Colony Forming Unit CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) Dil Fac Dilution Factor DL Detection Limit (DoD/DOE) DL, RA, RE, IN Indicates a Dilution, Re -analysis, Re -extraction, or additional Initial metals/anion analysis of the sample DLC Decision Level Concentration (Radiochemistry) EDL Estimated Detection Limit (Dioxin) LOD Limit of Detection (DoD/DOE) LOQ Limit of Quantitation (DoD/DOE) MCL EPA recommended "Maximum Contaminant Level" MDA Minimum Detectable Activity (Radiochemistry) MDC Minimum Detectable Concentration (Radiochemistry) MDL Method Detection Limit ML Minimum Level (Dioxin) MPN Most Probable Number MQL Method Quantitation Limit NC Not Calculated ND Not Detected at the reporting limit (or MDL or EDL if shown) NEG Negative / Absent POS Positive / Present PQL Practical Quantitation Limit PRES Presumptive QC Quality Control RER Relative Error Ratio (Radiochemistry) RL Reporting Limit or Requested Limit (Radiochemistry) RPD Relative Percent Difference, a measure of the relative difference between two points TEF Toxicity Equivalent Factor (Dioxin) TEQ Toxicity Equivalent Quotient (Dioxin) TNTC Too Numerous To Count Eurofins TestAmerica, Savannah Page 4 of 28 3/26/2021 Case Narrative Client: Civil & Environmental Consultants Inc Job ID: 680-196438-4 Job ID: 680-196438-4 Laboratory: Eurofins TestAmerica, Savannah Narrative CASE NARRATIVE Client: Civil & Environmental Consultants Inc Project: Alcoa - Groundwater & Waste Characteriza Report Number: 680-196438-4 With the exceptions noted as flags or footnotes, standard analytical protocols were followed in the analysis of the samples and no problems were encountered or anomalies observed. In addition all laboratory quality control samples were within established control limits, with any exceptions noted below. Each sample was analyzed to achieve the lowest possible reporting limit within the constraints of the method. In the event of interference or analytes present at high concentrations, samples may be diluted. For diluted samples, the reporting limits are adjusted relative to the dilution required. RECEIPT The samples were received on 03/18/2021; the samples arrived in good condition, properly preserved and on ice. The temperature of the coolers at receipt was 1.1 C. FREE CYANIDE Samples WSPL-SEEP (680-196438-10), Out005-North Sump (680-196438-11), Out005-South Sump (680-196438-12), Out005-01-2.510 (680-196438-13), Out005-06-2.400 (680-196438-14), Out005-07-2.210 (680-196438-15), Out005-08-2.200 (680-196438-16), Out005-09-2.100 (680-196438-17), Out005-12-2.000 (680-196438-18), Out005-10-6.100 (680-196438-19) and Out005-11-6.000 (680-196438-20) were analyzed for free cyanide in accordance with 1677. The samples were analyzed on 03/24/2021. Cyanide, Free failed the recovery criteria low for the MS of sample Out005-North SumpMS (680-196438-11) in batch 180-350778. Cyanide, Free failed the recovery criteria low for the MSD of sample Out005-North SumpMSD (680-196438-11) in batch 180-350778. Cyanide, Free exceeded the RPD limit. Sample matrix interference and/or non -homogeneity are suspected because the associated laboratory control sample (LCS) recovery was within acceptance limits. Refer to the QC report for details. No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. ANIONS BY ION CHROMATOGRAPHY (28 DAY) Samples WSPL-SEEP (680-196438-10), Out005-North Sump (680-196438-11), Out005-South Sump (680-196438-12), Out005-01-2.510 (680-196438-13), Out005-06-2.400 (680-196438-14), Out005-07-2.210 (680-196438-15), Out005-08-2.200 (680-196438-16), Out005-09-2.100 (680-196438-17), Out005-12-2.000 (680-196438-18), Out005-10-6.100 (680-196438-19) and Out005-11-6.000 (680-196438-20) were analyzed for Anions by Ion Chromatography (28 Day) in accordance with EPA Method 300.0. The samples were analyzed on 03/22/2021 and 03/24/2021. No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. CYANIDE Samples WSPL-SEEP (680-196438-10), Out005-North Sump (680-196438-11), Out005-South Sump (680-196438-12), Out005-01-2.510 (680-196438-13), Out005-06-2.400 (680-196438-14), Out005-07-2.210 (680-196438-15), Out005-08-2.200 (680-196438-16), Out005-09-2.100 (680-196438-17), Out005-12-2.000 (680-196438-18), Out005-10-6.100 (680-196438-19) and Out005-11-6.000 (680-196438-20) were analyzed for cyanide in accordance with D7511-12. The samples were analyzed on 03/23/2021. Samples Out005-01-2.510 (680-196438-13)[5X] and Out005-12-2.000 (680-196438-18)[5X] required dilution prior to analysis. The reporting limits have been adjusted accordingly. No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Eurofins TestAmerica, Savannah Page 5 of 28 3/26/2021 Case Narrative Client: Civil & Environmental Consultants Inc Job ID: 680-196438-4 Job ID: 680-196438-4 (Continued) Laboratory: Eurofins TestAmerica, Savannah (Continued) Eurofins TestAmerica, Savannah Page 6 of 28 3/26/2021 Client Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-196438-4 Client Sample ID: WSPL-SEEP Date Collected: 03/16/21 14:40 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-10 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate 14 1.0 0.40 mg/L 03/22/21 21:37 1 Fluoride 11 0.10 0.040 mg/L 03/22/21 21:37 1 Chloride 1.7 0.50 0.20 mg/L 03/22/21 21:37 1 Bromide <0.20 0.50 0.20 mg/L 03/22/21 21:37 1 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total Cyanide, Free 0.047 0.0060 0.0020 mg/L <0.00079 0.0020 0.00079 mg/L 03/23/21 16:37 1 03/24/21 21:48 1 Client Sample ID: Out005-North Sump Date Collected: 03/16/21 15:48 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-11 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate 18 1.0 0.40 mg/L 03/22/21 21:50 1 Fluoride 6.0 0.10 0.040 mg/L 03/22/21 21:50 1 Chloride 2.4 0.50 0.20 mg/L 03/22/21 21:50 1 L Bromide <0.20 0.50 0.20 mg/L 03/22/21 21:50 1 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total Cyanide, Free 0.032 <0.00079 F1 F2 0.0060 0.0020 0.0020 mg/L 0.00079 mg/L 03/23/21 16:55 1 03/24/21 21:54 1 Client Sample ID: Out005-South Sump Date Collected: 03/16/21 16:35 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-12 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate 15 1.0 0.40 mg/L 03/22/21 22:53 1 Fluoride 4.3 0.10 0.040 mg/L 03/22/21 22:53 1 Chloride 2.1 0.50 0.20 mg/L 03/22/21 22:53 1 Bromide 0.20 J 0.50 0.20 mg/L 03/22/21 22:53 1 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total Cyanide, Free 0.070 0.0060 <0.00079 0.0020 Client Sample ID: Out005-01-2.510 Date Collected: 03/16/21 14:00 Date Received: 03/18/21 15:31 0.0020 mg/L 0.00079 mg/L 03/23/21 16:43 1 03/24/21 21:59 1 Lab Sample ID: 680-196438-13 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate 7.7 1.0 0.40 mg/L Fluoride 1.1 0.10 0.040 mg/L Chloride 0.92 0.50 0.20 mg/L Bromide <0.20 0.50 0.20 mg/L 03/22/21 23:31 1 03/22/21 23:31 1 03/22/21 23:31 1 03/22/21 23:31 1 Eurofins TestAmerica, Savannah Page 7 of 28 3/26/2021 Client Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-196438-4 Client Sample ID: Out005-01-2.510 Date Collected: 03/16/21 14:00 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-13 Matrix: Water General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 0 Cyanide, Total 0.046 0.030 0.010 mg/L 03/23/21 16:31 5 Cyanide, Free <0.00079 0.0020 0.00079 mg/L 03/24/21 22:06 1 Client Sample ID: Out005-06-2.400 Date Collected: 03/17/21 09:45 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-14 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate 19 1.0 0.40 mg/L 03/22/21 23:44 1 Fluoride 2.3 0.10 0.040 mg/L 03/22/21 23:44 1 Chloride 2.1 0.50 0.20 mg/L 03/22/21 23:44 1 LBromide <0.20 0.50 0.20 mg/L 03/22/21 23:44 1 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total 0.0057 J 0.0060 0.0020 mg/L 03/23/21 17:19 1 Cyanide, Free <0.00079 0.0020 0.00079 mg/L 03/24/21 22:08 1 Client Sample ID: Out005-07-2.210 Date Collected: 03/17/21 10:00 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-15 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate Fluoride Chloride Bromide 17 1.0 0.40 mg/L 03/24/21 02:23 1 2.6 0.10 0.040 mg/L 03/24/21 02:23 1 1.9 0.50 0.20 mg/L 03/24/21 02:23 1 <0.20 0.50 0.20 mg/L 03/24/21 02:23 1 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total Cyanide, Free 0.0050 J <0.00079 0.0060 0.0020 0.0020 mg/L 0.00079 mg/L 03/23/21 17:01 1 03/24/21 22:09 1 Client Sample ID: Out005-08-2.200 Date Collected: 03/17/21 10:20 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-16 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate 18 1.0 0.40 mg/L 03/24/21 02:36 1 Fluoride 2.7 0.10 0.040 mg/L 03/24/21 02:36 1 Chloride 1.9 0.50 0.20 mg/L 03/24/21 02:36 1 Bromide <0.20 0.50 0.20 mg/L 03/24/21 02:36 1 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total Cyanide, Free 0.010 0.0060 0.0020 mg/L <0.00079 0.0020 0.00079 mg/L 03/23/21 16:47 1 03/24/21 22:11 1 6 Eurofins TestAmerica, Savannah Page 8 of 28 3/26/2021 Client Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-196438-4 Client Sample ID: Out005-09-2.100 Date Collected: 03/17/21 10:45 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-17 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate 22 1.0 0.40 mg/L 03/24/21 02:48 1 Fluoride 2.7 0.10 0.040 mg/L 03/24/21 02:48 1 Chloride 2.0 0.50 0.20 mg/L 03/24/21 02:48 1 Bromide <0.20 0.50 0.20 mg/L 03/24/21 02:48 1 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total Cyanide, Free 0.0092 0.0060 0.0020 mg/L 03/23/21 16:57 1 <0.00079 0.0020 0.00079 mg/L 03/24/21 22:12 1 Client Sample ID: Out005-12-2.000 Date Collected: 03/17/21 11:00 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-18 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate 24 1.0 0.40 mg/L 03/24/21 03:01 1 Fluoride 2.6 0.10 0.040 mg/L 03/24/21 03:01 1 Chloride 2.2 0.50 0.20 mg/L 03/24/21 03:01 1 L Bromide <0.20 0.50 0.20 mg/L 03/24/21 03:01 1 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total Cyanide, Free 0.046 0.030 0.010 mg/L 03/23/21 16:53 5 <0.00079 0.0020 0.00079 mg/L 03/24/21 22:14 1 Client Sample ID: Out005-10-6.100 Date Collected: 03/17/21 12:20 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-19 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate 24 1.0 0.40 mg/L 03/24/21 03:14 1 Fluoride 0.38 0.10 0.040 mg/L 03/24/21 03:14 1 Chloride 3.9 0.50 0.20 mg/L 03/24/21 03:14 1 Bromide <0.20 0.50 0.20 mg/L 03/24/21 03:14 1 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total Cyanide, Free <0.0020 0.0060 0.0020 mg/L <0.00079 0.0020 0.00079 mg/L Client Sample ID: Out005-11-6.000 Date Collected: 03/17/21 12:40 Date Received: 03/18/21 15:31 03/23/21 16:45 1 03/24/21 22:15 1 Lab Sample ID: 680-196438-20 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate 24 1.0 0.40 mg/L 03/24/21 03:26 1 Fluoride 0.37 0.10 0.040 mg/L 03/24/21 03:26 1 Chloride 3.9 0.50 0.20 mg/L 03/24/21 03:26 1 Bromide <0.20 0.50 0.20 mg/L 03/24/21 03:26 1 Eurofins TestAmerica, Savannah Page 9 of 28 3/26/2021 Client Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-196438-4 Client Sample ID: Out005-11-6.000 Date Collected: 03/17/21 12:40 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-20 Matrix: Water General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 0 Cyanide, Total 0.0027 J 0.0060 0.0020 mg/L 03/23/21 16:33 1 Cyanide, Free <0.00079 0.0020 0.00079 mg/L 03/24/21 22:17 1 6 Eurofins TestAmerica, Savannah Page 10 of 28 3/26/2021 QC Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-196438-4 Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Lab Sample ID: MB 680-660756/33 Matrix: Water Analysis Batch: 660756 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate <0.40 1.0 0.40 mg/L 03/22/21 19:18 1 Fluoride <0.040 0.10 0.040 mg/L 03/22/21 19:18 1 Chloride <0.20 0.50 0.20 mg/L 03/22/21 19:18 1 Bromide <0.20 0.50 0.20 mg/L 03/22/21 19:18 1 Lab Sample ID: LCS 680-660756/34 Matrix: Water Analysis Batch: 660756 Analyte Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Sulfate 10.0 9.75 mg/L 98 90 - 110 Fluoride 2.00 2.04 mg/L 102 90 - 110 Chloride 10.0 10.0 mg/L 100 90 - 110 Bromide 10.0 9.89 mg/L 99 90. 110 Lab Sample ID: LCSD 680-660756/35 Matrix: Water Analysis Batch: 660756 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Spike LCSD LCSD %Rec. RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Sulfate 10.0 9.75 mg/L 98 90 _ 110 0 15 Fluoride 2.00 2.05 mg/L 102 90 _ 110 0 15 Chloride 10.0 10.0 mg/L 100 90 _ 110 0 15 Bromide 10.0 9.87 mg/L 99 90 _ 110 0 15 Lab Sample ID: 680-196438-12 MS Matrix: Water Analysis Batch: 660756 Analyte Client Sample ID: Out005-South Sump Prep Type: Total/NA Sample Sample Spike MS MS %Rec. Result Qualifier Added Result Qualifier Unit D %Rec Limits Sulfate 15 10.0 25.2 mg/L 101 80 _ 120 Fluoride 4.3 2.00 6.24 mg/L 97 80 _ 120 Chloride 2.1 10.0 12.4 mg/L 103 80 _ 120 Bromide 0.20 J 10.0 10.2 mg/L 102 80 - 120 Lab Sample ID: 680-196438-12 MSD Matrix: Water Analysis Batch: 660756 Client Sample ID: Out005-South Sump Prep Type: Total/NA Sample Sample Spike MSD MSD %Rec. RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Sulfate 15 10.0 24.9 mg/L 99 80 - 120 1 15 Fluoride 4.3 2.00 6.20 mg/L 94 80. 120 1 15 Chloride 2.1 10.0 12.1 mg/L 101 80. 120 2 15 Bromide 0.20 J 10.0 9.93 mg/L 99 80 _ 120 2 15 Lab Sample ID: MB 680-660929/33 Matrix: Water Analysis Batch: 660929 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate <0.40 1.0 0.40 mg/L 03/23/21 21:57 1 Eurofins TestAmerica, Savannah Page 11 of 28 3/26/2021 QC Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-196438-4 Method: 300.0-1993 R2.1 - Anions, Ion Chromatography (Continued) Lab Sample ID: MB 680-660929/33 Matrix: Water Analysis Batch: 660929 MB MB Analyte Result Qualifier RL MDL Unit Fluoride <0.040 0.10 0.040 mg/L Chloride <0.20 0.50 0.20 mg/L Bromide <0.20 0.50 0.20 mg/L Lab Sample ID: LCS 680-660929/34 Matrix: Water Analysis Batch: 660929 Analyte Client Sample ID: Method Blank Prep Type: Total/NA D Prepared Analyzed Dil Fac 03/23/21 21:57 1 03/23/21 21:57 1 03/23/21 21:57 1 Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Sulfate 10.0 9.61 mg/L 96 90 _ 110 Fluoride 2.00 2.03 mg/L 102 90 _ 110 Chloride 10.0 9.99 mg/L 100 90 _ 110 Bromide 10.0 9.84 mg/L 98 90 _ 110 Lab Sample ID: LCSD 680-660929/35 Matrix: Water Analysis Batch: 660929 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Spike LCSD LCSD %Rec. RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Sulfate 10.0 9.63 mg/L 96 90 - 110 0 15 Fluoride 2.00 2.03 mg/L 102 90 - 110 0 15 Chloride 10.0 9.99 mg/L 100 90 - 110 0 15 Bromide 10.0 9.83 mg/L 98 90 - 110 0 15 Method: D7511-12 - Total Cyanide Lab Sample ID: MB 410-107202/17 Matrix: Water Analysis Batch: 107202 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total <0.0020 0.0060 0.0020 mg/L 03/23/21 16:07 1 Lab Sample ID: MB 410-107202/47 Matrix: Water Analysis Batch: 107202 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total <0.0020 0.0060 0.0020 mg/L 03/23/21 17:07 1 Lab Sample ID: LCS 410-107202/16 Matrix: Water Analysis Batch: 107202 Analyte Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Cyanide, Total 0.0400 0.0381 mg/L 95 84 _ 116 Eurofins TestAmerica, Savannah Page 12 of 28 3/26/2021 QC Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-196438-4 Method: D7511-12 - Total Cyanide (Continued) pLab Sample ID: LCS 410-107202/46 Matrix: Water Analysis Batch: 107202 Analyte Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Cyanide, Total pLab Sample ID: 680-196438-10 MS Matrix: Water Analysis Batch: 107202 Analyte 0.0300 0.0307 mg/L 102 84. 116 Client Sample ID: WSPL-SEEP Prep Type: Total/NA a Sample Sample Spike MS MS %Rec. Result Qualifier Added Result Qualifier Unit D %Rec Limits Cyanide, Total 0.047 Lab Sample ID: 680-196438-10 DU Matrix: Water Analysis Batch: 107202 Analyte 0.0200 0.0653 mg/L 92 84 _ 116 Client Sample ID: WSPL-SEEP Prep Type: Total/NA Sample Sample DU DU RPD Result Qualifier Result Qualifier Unit D RPD Limit Cyanide, Total 0.047 0.0469 mg/L 0 20 Method: OIA-1677 - Cyanide, Free (Flow Injection) Lab Sample ID: MB 180-350778/21 Matrix: Water Analysis Batch: 350778 Client Sample ID: Method Blank Prep Type: Total/NA MB MB LAnalyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Free <0.00079 0.0020 0.00079 mg/L 03/24/21 21:26 1 [Lab Sample ID: MB 180-350778/39 Matrix: Water Analysis Batch: 350778 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Free <0.00079 0.0020 0.00079 mg/L 03/24/21 21:53 1 Lab Sample ID: LCS 180-350778/20 Matrix: Water Analysis Batch: 350778 Analyte Cyanide, Free Lab Sample ID: LCS 180-350778/38 Matrix: Water Analysis Batch: 350778 Analyte Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits 0.0500 0.0528 mg/L 106 82 - 132 Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Cyanide, Free 0.0500 0.0608 mg/L 122 82. 132 Eurofins TestAmerica, Savannah Page 13 of 28 3/26/2021 QC Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-196438-4 Method: OIA-1677 - Cyanide, Free (Flow Injection) (Continued) rLab Sample ID: 680-196438-11 MS Matrix: Water Analysis Batch: 350778 Client Sample ID: Out005-North Sump Prep Type: Total/NA Sample Sample Spike MS MS %Rec. Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits Cyanide, Free <0.00079 F1 F2 0.0500 0.00360 F1 mg/L 7 82 _ 130 rLab Sample ID: 680-196438-11 MSD Matrix: Water Analysis Batch: 350778 Analyte Client Sample ID: Out005-North Sump Prep Type: Total/NA a Sample Sample Spike MSD MSD %Rec. RPD Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Cyanide, Free <0.00079 F1 F2 0.0500 0.00432 F1 F2 mg/L 9 82 _130 18 11 Eurofins TestAmerica, Savannah Page 14 of 28 3/26/2021 Client: Civil & Environmental Consultants Inc QC Association Summary Job ID: 680-196438-4 HPLC/IC Analysis Batch: 660756 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 680-196438-10 680-196438-11 680-196438-12 680-196438-13 680-196438-14 MB 680-660756/33 LCS 680-660756/34 LCSD 680-660756/35 680-196438-12 MS 680-196438-12 MSD Analysis Batch: 660929 Lab Sample ID 680-196438-15 680-196438-16 680-196438-17 680-196438-18 680-196438-19 680-196438-20 MB 680-660929/33 LCS 680-660929/34 LCSD 680-660929/35 WSPL-SEEP Out005-North Sump Out005-South Sump Out005-01-2.510 Out005-06-2.400 Method Blank Lab Control Sample Lab Control Sample Dup Out005-South Sump Out005-South Sump Client Sample ID out005-07-2.210 Out005-08-2.200 Out005-09-2.100 Out005-12-2.000 Out005-10-6.100 Out005-11-6.000 Method Blank Lab Control Sample Lab Control Sample Dup Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Prep Type Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Water Water Water Water Water Water Water Water Water Water Matrix Water Water Water Water Water Water Water Water Water 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 Method 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 8 Prep Batch 1 1 General Chemistry Analysis Batch: 107202 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 680-196438-10 680-196438-11 680-196438-12 680-196438-13 680-196438-14 680-196438-15 680-196438-16 680-196438-17 680-196438-18 680-196438-19 680-196438-20 MB 410-107202/17 MB 410-107202/47 LCS 410-107202/16 LCS 410-107202/46 680-196438-10 MS 680-196438-10 DU Analysis Batch: 350778 Lab Sample ID WSPL-SEEP Out005-North Sump Out005-South Sump Out005-01-2.510 Out005-06-2.400 Out005-07-2.210 Out005-08-2.200 Out005-09-2.100 Out005-12-2.000 Out005-10-6.100 Out005-11-6.000 Method Blank Method Blank Lab Control Sample Lab Control Sample WSPL-SEEP WSPL-SEEP Client Sample ID Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Prep Type Water Water Water Water Water Water Water Water Water Water Water Water Water Water Water Water Water Matrix D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 Method Prep Batch 680-196438-10 680-196438-11 680-196438-12 680-196438-13 680-196438-14 WSPL-SEEP Out005-North Sump Out005-South Sump Out005-01-2.510 Out005-06-2.400 Total/NA Total/NA Total/NA Total/NA Total/NA Water Water Water Water Water OIA-1677 OIA-1677 OIA-1677 OIA-1677 OIA-1677 Eurofins TestAmerica, Savannah Page 15 of 28 3/26/2021 QC Association Summary Client: Civil & Environmental Consultants Inc Job ID: 680-196438-4 General Chemistry (Continued) Analysis Batch: 350778 (Continued) Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 680-196438-15 Out005-07-2.210 Total/NA Water OIA-1677 680-196438-16 Out005-08-2.200 Total/NA Water OIA-1677 680-196438-17 Out005-09-2.100 Total/NA Water OIA-1677 680-196438-18 Out005-12-2.000 Total/NA Water OIA-1677 680-196438-19 Out005-10-6.100 Total/NA Water OIA-1677 680-196438-20 Out005-11-6.000 Total/NA Water OIA-1677 MB 180-350778/21 Method Blank Total/NA Water OIA-1677 MB 180-350778/39 Method Blank Total/NA Water OIA-1677 LCS 180-350778/20 Lab Control Sample Total/NA Water OIA-1677 LCS 180-350778/38 Lab Control Sample Total/NA Water OIA-1677 680-196438-11 MS Out005-North Sump Total/NA Water OIA-1677 680-196438-11 MSD Out005-North Sump Total/NA Water OIA-1677 Eurofins TestAmerica, Savannah Page 16 of 28 3/26/2021 Lab Chronicle Client Sample ID: WSPL-SEEP Date Collected: 03/16/21 14:40 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-10 Matrix: Water Prep Type Batch Batch Type Method Run Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Total/NA Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 660756 03/22/21 21:37 UI TAL SAV Instrument ID: CICK Analysis D7511-12 1 107202 03/23/21 16:37 UJE2 ELLE Instrument ID: 19369 Analysis OIA-1677 1 350778 03/24/21 21:48 GRB TAL PIT Instrument ID: ALPKEM3 Client Sample ID: Out005-North Sump Date Collected: 03/16/21 15:48 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-11 Matrix: Water Prep Type Batch Batch Type Method Run Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Total/NA Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 660756 03/22/21 21:50 Ul TAL SAV Instrument ID: CICK Analysis D7511-12 1 107202 03/23/21 16:55 UJE2 ELLE Instrument ID: 19369 Analysis OIA-1677 1 350778 03/24/21 21:54 GRB TAL PIT Instrument ID: ALPKEM3 Client Sample ID: Out005-South Sump Date Collected: 03/16/21 16:35 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-12 Matrix: Water Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 660756 03/22/21 22:53 Ul TAL SAV Instrument ID: CICK Total/NA Analysis D7511-12 1 107202 03/23/21 16:43 UJE2 ELLE Instrument ID: 19369 Total/NA Analysis OIA-1677 1 350778 03/24/21 21:59 GRB TAL PIT Instrument ID: ALPKEM3 Client Sample ID: Out005-01-2.510 Date Collected: 03/16/21 14:00 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-13 Matrix: Water Prep Type Batch Batch Type Method Run Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 660756 03/22/21 23:31 UI TAL SAV Instrument ID: CICK Total/NA Analysis D7511-12 5 107202 03/23/21 16:31 UJE2 ELLE Instrument ID: 19369 Total/NA Analysis OIA-1677 1 350778 03/24/21 22:06 GRB TAL PIT Instrument ID: ALPKEM3 Eurofins TestAmerica, Savannah Page 17 of 28 3/26/2021 Lab Chronicle Client Sample ID: Out005-06-2.400 Date Collected: 03/17/21 09:45 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-14 Matrix: Water Prep Type Batch Batch Type Method Run Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Total/NA Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 660756 03/22/21 23:44 UI TAL SAV Instrument ID: CICK Analysis D7511-12 1 107202 03/23/21 17:19 UJE2 ELLE Instrument ID: 19369 Analysis OIA-1677 1 350778 03/24/21 22:08 GRB TAL PIT Instrument ID: ALPKEM3 Client Sample ID: Out005-07-2.210 Date Collected: 03/17/21 10:00 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-15 Matrix: Water Prep Type Batch Batch Type Method Run Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Total/NA Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 660929 03/24/21 02:23 T1C TAL SAV Instrument ID: CICK Analysis D7511-12 1 107202 03/23/21 17:01 UJE2 ELLE Instrument ID: 19369 Analysis OIA-1677 1 350778 03/24/21 22:09 GRB TAL PIT Instrument ID: ALPKEM3 Client Sample ID: Out005-08-2.200 Date Collected: 03/17/21 10:20 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-16 Matrix: Water Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 660929 03/24/21 02:36 T1C TAL SAV Instrument ID: CICK Total/NA Analysis D7511-12 1 107202 03/23/21 16:47 UJE2 ELLE Instrument ID: 19369 Total/NA Analysis OIA-1677 1 350778 03/24/21 22:11 GRB TAL PIT Instrument ID: ALPKEM3 Client Sample ID: Out005-09-2.100 Date Collected: 03/17/21 10:45 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-17 Matrix: Water Prep Type Batch Batch Type Method Run Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 660929 03/24/21 02:48 T1C TAL SAV Instrument ID: CICK Total/NA Analysis D7511-12 1 107202 03/23/21 16:57 UJE2 ELLE Instrument ID: 19369 Total/NA Analysis OIA-1677 1 350778 03/24/21 22:12 GRB TAL PIT Instrument ID: ALPKEM3 Eurofins TestAmerica, Savannah Page 18 of 28 3/26/2021 Lab Chronicle Client Sample ID: Out005-12-2.000 Date Collected: 03/17/21 11:00 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-18 Matrix: Water Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 660929 03/24/21 03:01 TIC TAL SAV Instrument ID: CICK Total/NA Analysis D7511-12 5 107202 03/23/21 16:53 UJE2 ELLE Instrument ID: 19369 Total/NA Analysis OIA-1677 1 350778 03/24/21 22:14 GRB TAL PIT Instrument ID: ALPKEM3 Client Sample ID: Out005-10-6.100 Date Collected: 03/17/21 12:20 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-19 Matrix: Water Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 660929 03/24/21 03:14 T1C TAL SAV Instrument ID: CICK Total/NA Analysis D7511-12 1 107202 03/23/21 16:45 UJE2 ELLE Instrument ID: 19369 Total/NA Analysis OIA-1677 1 350778 03/24/21 22:15 GRB TAL PIT Instrument ID: ALPKEM3 Client Sample ID: Out005-11-6.000 Date Collected: 03/17/21 12:40 Date Received: 03/18/21 15:31 Lab Sample ID: 680-196438-20 Matrix: Water Prep Type Batch Batch Type Method Run Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 660929 03/24/21 03:26 T1C TAL SAV Instrument ID: CICK Total/NA Analysis D7511-12 1 107202 03/23/21 16:33 UJE2 ELLE Instrument ID: 19369 Total/NA Analysis OIA-1677 1 350778 03/24/21 22:17 GRB TAL PIT Instrument ID: ALPKEM3 Laboratory References: ELLE = Eurofins Lancaster Laboratories Env, LLC, 2425 New Holland Pike, Lancaster, PA 17601, TEL (717)656-2300 TAL PIT = Eurofins TestAmerica, Pittsburgh, 301 Alpha Drive, RIDC Park, Pittsburgh, PA 15238, TEL (412)963-7058 TAL SAV = Eurofins TestAmerica, Savannah, 5102 LaRoche Avenue, Savannah, GA 31404, TEL (912)354-7858 Eurofins TestAmerica, Savannah Page 19 of 28 3/26/2021 c � c W H W 0 N •r 0) N r r Chain of Custody Record 0 Ln Csi 5102 LaRoche Avenue to V CT o N 2 U O 0 Page Page 1 ofa Preservation Codes: A - HCL M - Hexane B -NaOH N - None C - Zn Acetate 0 - AsNa02 D - Nitnc Aod P - Na2O4S E - NaHSO4 0 - Na2S03 F - Me0H R - Na2S2O3 G - Amchlor S - H2SO4 H - Ascorbic Acid T - TSP Dodecahydrate I - Ice U - Acetone J - DI Water V - MCAA K - EDTA W • pH 4-5 L - EDA Z - other (specify) Other: ;?:\ Z c o R A. i Sample Disposal (A fee may be assessed if samples are retained longer than 1 month) Return To Client Disposal By Lab Archive For Months Special Instructions/CC Requirements 'Empty Kit Relinquished by. IDate ITlme 'Method of Shipment a *til A Coder Temperature(s)°C and Other Remarks 1 'n ' f •c — Apo sn3 ao wey3 8CP961-089 T „z-is 7 1 -V7 VU ' Lamer Tracking kicks) a Analysis Requested tisuImuoa ►o .mgwnN Iu of r o Q (MaSM/WhL%d014c tyro), x &Q10/ 1d��o�ob y Received y 13) rt hrob X �2 n L. &faO kX .>> X 7L,7*- Lab PM Hoffman, Sheila B E-Mail Sheila Hoffman@Eurofinset com 1111-7v ''° " r.%1-Q� 1 i 5 L. 0 X, x., )( )1., �C )4- X �'-)'11Q 1.3 1 }'-e-L O IQQ i i�, x' ?(?'-- 7� X �l. �Y/., /( x �( ssi.• aor9z 9.009 •8OIz9 Z ' •aea0 V Ilo • arm y ��!1. WnupWnIV' VMO L'OOz X ■IuoW W V- O-¢HN009WdS 7 �,(� 4/04191) o U Company §. 0 U Custody Seals Intact: 'Custody Seal No n Yes A No (oN Jo SIA) wdwsg Pvgu Plsld Possible Hazard Identification ` I Non -Hazard I 1 Flammable Skin Irritant I Poison B I Unknown Radiological Deliverable Requested' I, II, III, IV, Other (specify) Due Date Requested: TAT Requested (days): [Compliance Project: T Yes t No PO — I Purchase Order Requested Project # 68025248 Matrixte (w-war. s•.oia. o•wa.riou Y. eT•T•ue, A•AH) 0 Water i/ / Sampler Ali . OA� 0 v� O a a a o A E aY h~�� o CAS 0 0 a Company Civil & Environmental Consultants Inc 3 y M _ 1% C4 Ci Ch �_ i4'-• c't� Ch v Cc) c S" Client Information• Client Contact Matt Ginther Address 3701 Arco Corporate Drive Suite 400 City Charlotte Stale. Zip NC, 28273 Email mginther@cecinc.com Protect Name boo-a(g.00l3 Sample Identification Out005-13-2.050 oo0 aa 9 0,—,0 4 ciD a '3 Q , t%L Relinquished by / { /, - Page 20 of 28 3/26/2021 Charlotte 229 Chain of Custody Record COC No 680-123943-46437.1 Page Page of 2 Da Preservation Codes: A - I-ICL M Hexane B -NaOH N - None C Zn Acetate 0 - AsNa02 D - Ndnc Acid P - Na204S E - NaHSO4 Q - Na2S03 F - Me0H R - Na2S203 G • Amchlor S • H2SO4 H • Ascorbic Acid T - TSP Dodecahydrate I - Ice U - Acetone J DI Water V - MCAA K -EDTA W-pH4-5 L - EDA Z - otter (specify) Other � zs VfU' u) I Sample Disposal (A fee may b9 assessed if samples are retained longer than 1 month) Return To Client Disposal By Lab Archive For Months Special Instructions/QC Requirements ..r I TICompany Custody Seals Intact 'Custody Seal No Cooer Temperatures) `C and Other Remarks \ `� AYes ANo 11 li r Career Tracking No(s) State of Ongin Analysis Requested sJeulquoo jo JiQwnN IRol ; yII1 l I — III (nlikv)Nv viv l;"^t/ 4L9 l 4Y-1-0 'Empty Kit Relinquished by (Date ITlme (Method of $ •, '' ` ill Company ./`_„T L f 111115 k) %-,w- u c)z. c >, III 4(r4 LA Q•QQc k AI — Lab PM (Hoffman, Sheila B CB w ? L w � Auuawual-.«oo z ue-as m oPW�06 opi m U aen-dr3T-vON z 111111111111 (ON JO $.A) OSW/SW 1d c E_ (ON JO SOA) sldweS P.'.w PIMA Preservation Code: Possible Hazard Identification Non -Hazard I I Flammable Skin lrrrtant 1 Poison 8 U Unknown I I Radiological Deliverable Requested I, II, III. IV, Other (specify) Due Date Requested: TAT Requested (days): (Compliance Project: ' Yes A No PO# Purchase Order Requested Project # 68025248 Matrix (W-water, s•.aa. o•wswra. BT•T Sue. MAtr) _ da 60 QI a n c � rn~UC7 Company Civil & Environmental Consultants Inc to H` ' ` • +EIRE Sample Date r III Address 2704 Cherokee Farm Way Suite 101 City Knoxville State. Zip. TN, 37920 s ( Email mworden@cecinc.com Project Name 300-226.0013 �� d d cn Sample Identification ; O mo . it • ( •o 1 lbab0° Ct 1� 1 ow . 1 cp 1 c) ik I Z °NI Client Information Client Contact Michael Worden -1 .' • 71 Y = Page 21 of 28 3/26/2021 0 QJ Chain of Custody Record COC No j 680-647348 1 N & al N a' d !Job a 680-196438-1 Preservation Codes: A - HCL M - Hexane B - NaOH N - None C - Zn Acetate 0 - AsNaO2 D - Nitric Acid P - Na2O4S E - NaHSO4 0 - Na2S03 F -MeOH R-Na2S203 G • Amchlor S - H2SO4 H • Ascorbic Acid T - TSP Dodecahydrate I - Ice U - Acetone J • DI Water V - MCAA K • EDTA W - pH 4.5 L - EDA Z • other (specuh. Other: Special Instructions/Note: Note Since laboratory accreddahons are subject to change. Eurofins TestAmenca places the ownership of method analyle 8 accreditation compliance upon out subcontract laboratories This sample shipment is forwarded under chain -of -custody If the laboratory does not currently maintain accreditation in the State of Origin listed above for analysis/tests/matrix being analyzed. the samples must be shipped back to the Eurofins TestAmenca laboratory or other instructions wdl be provided Any changes to accreditation status should be brought to Eurofins TestAmenca attention immediately If alt requested accreditation are current to date. return the signed Chain of Custody attesting to said comphcance to Eurofins TestAmenca Sample Disposal ( A fee may be assessed if samples are retained longer than 1 month) Return To Client 0 Disposal By Lab Archive For Mon. Special Instructions/QC Requirements 'Empty Kit Relinquished by. IDate. ITlme 'Method of Shipment E E 0 U E E 0 U n E 0 U Cooler Temperalurels) °C and Other Remarks v E o t m O %m m o Career Tracking NO(S) Stale of Ong° North Carolina Accreditations Required (See note) State - North Carolina (WW/SW) Analysis Requested wewquoa;o JeqwnN L5 of Received by a m d d CC Received by 1 Lab PM Hoffman. Sheila B E-Mail Sheila Hoffman@Eurofinset com dno-pasolo suai .A suad'Apimepu61 mow X (ON Jo SSA) OSW/SW uuoYedx n 0 0 o 0 U T u 0 0 (Custody Seal No (ON Jo SSA) eldw,S pueUld PIMA Possible Hazard Identification Unconfirmed Deliverable Requested 1, 11. III, IV. Other (specify) Primary Deliverable Rank 2 Company Eurofins Lancaster Laboratories Env LLC TAT Requested (days): 6rotect u 68025248 ?Lc si_ a 2 3 a; y T• _ 0 m LPreservation Code: 4.53 u0 3 Z.ogm E ]4.. u o co F- u u h V0 m 22mE.'D 0 m CtQ 0 m 0 c ia ? la E o r a M v " a o w w v m K N y O N N aO U w Sample Date N (O zM Client Information (Sub Contract Lab) Client Contact Shipping/Receiving Address 2425 New Holland Pike. . 03 l0 u U J Slate Zup PA, 17601 Phone 717-656-2300(Tel) W Project Name Alcoa - Groundwater 8 Waste Characterize m CO Sample Identification - Client ID (Lab ID) ABF-WC001-F006 (680-196438-9) Relinquished by Relinquished by Relinquished by Custody Seals Intact. A Yes n No 1I/01/2020 Page 22 of 28 3/26/2021 Login Sample Receipt Checklist Client: Civil & Environmental Consultants Inc Job Number: 680-196438-4 Login Number: 196438 List Number: 1 Creator: Daughtry, Beth A Question List Source: Eurofins TestAmerica, Savannah Answer Comment Radioactivity wasn't checked or is </= background as measured by a survey N/A meter. The cooler's custody seal, if present, is intact. True Sample custody seals, if present, are intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable. True Cooler Temperature is recorded. True COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True Is the Field Sampler's name present on COC? True There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True Sample Preservation Verified. True There is sufficient vol. for all requested analyses, incl. any requested True MS/MSDs Containers requiring zero headspace have no headspace or bubble is True <6mm (1/4"). Multiphasic samples are not present. True Samples do not require splitting or compositing. True Residual Chlorine Checked. N/A Eurofins TestAmerica, Savannah Page 23 of 28 3/26/2021 Login Sample Receipt Checklist Client: Civil & Environmental Consultants Inc Job Number: 680-196438-4 Login Number: 196438 List Number: 2 Creator: Phillips, Ann -Marie E Question List Source: Eurofins Lancaster Laboratories Env Answer Comment Radioactivity wasn't checked or is </= background as measured by a survey N/A meter. The cooler's custody seal is intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable (</=6C, not frozen). True Cooler Temperature is recorded. True WV: Container Temperature is acceptable (</=6C, not frozen). N/A WV: Container Temperature is recorded. N/A COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True There is sufficient vol. for all requested analyses. True Multiphasic samples are not present. True Samples do not require splitting or compositing. N/A Is the Field Sampler's name present on COC? True Sample Preservation Verified. N/A Residual Chlorine Checked. N/A Sample custody seals are intact. N/A Eurofins TestAmerica, Savannah Page 24 of 28 3/26/2021 Login Sample Receipt Checklist Client: Civil & Environmental Consultants Inc Job Number: 680-196438-4 Login Number: 196438 List Number: 4 Creator: Miller, Wesley R Question List Source: Eurofins Lancaster Laboratories Env List Creation: 03/20/21 03:04 PM Answer Comment Radioactivity wasn't checked or is </= background as measured by a survey N/A meter. The cooler's custody seal is intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable (</=6C, not frozen). True Cooler Temperature is recorded. True WV: Container Temperature is acceptable (</=6C, not frozen). N/A WV: Container Temperature is recorded. N/A COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True There is sufficient vol. for all requested analyses. True Multiphasic samples are not present. True Samples do not require splitting or compositing. N/A Is the Field Sampler's name present on COC? False Sample Preservation Verified. N/A Residual Chlorine Checked. N/A Sample custody seals are intact. N/A Received project as a subcontract. Eurofins TestAmerica, Savannah Page 25 of 28 3/26/2021 Login Sample Receipt Checklist Client: Civil & Environmental Consultants Inc Job Number: 680-196438-4 Login Number: 196438 List Number: 3 Creator: Kovitch, Christina M Question List Source: Eurofins TestAmerica, Pittsburgh List Creation: 03/18/21 07:31 PM Answer Comment Radioactivity wasn't checked or is </= background as measured by a survey N/A meter. The cooler's custody seal, if present, is intact. True Sample custody seals, if present, are intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable. True Cooler Temperature is recorded. True COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True Is the Field Sampler's name present on COC? True There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True Sample Preservation Verified. True There is sufficient vol. for all requested analyses, incl. any requested True MS/MSDs Containers requiring zero headspace have no headspace or bubble is True <6mm (1/4"). Multiphasic samples are not present. True Samples do not require splitting or compositing. True Residual Chlorine Checked. N/A Eurofins TestAmerica, Savannah Page 26 of 28 3/26/2021 Accreditation/Certification Summary Client: Civil & Environmental Consultants Inc Job ID: 680-196438-4 Laboratory: Eurofins TestAmerica, Savannah The accreditations/certifications listed below are applicable to this report. Authority Program Identification Number Expiration Date North Carolina (WW/SW) State 269 12-31-21 Laboratory: Eurofins Lancaster Laboratories Env, LLC All accreditations/certifications held by this laboratory are listed. Not all accreditations/certifications are applicable to this report. Authority Program Identification Number Expiration Date A2LA Dept. of Defense ELAP 1.01 11-30-22 Alaska State PA00009 06-30-21 Alaska (UST) State 17-027 01-31-21 * Arizona State AZ0780 03-12-22 Arkansas DEQ State 19-053-0 08-09-21 California State 2792 01-31-22 Colorado State PA00009 06-30-21 Connecticut State PH-0746 06-30-21 DE Haz. Subst. Cleanup Act (HSCA) State 019-006 (PA cert) 01-31-22 Delaware (DW) State N/A 02-01-22 Florida NELAP E87997 07-01-21 Hawaii State N/A 01-31-22 Illinois NELAP 004559 01-31-22 Iowa State 361 03-02-22 Kansas NELAP E-10151 10-31-21 Kentucky (DW) State KY90088 01-01-22 Kentucky (UST) State 1.01 11-30-22 Kentucky (WW) State KY90088 12-31-21 Louisiana NELAP 02055 06-30-21 Maine State 2019012 03-12-22 Maryland State 100 06-30-21 Massachusetts State M-PA009 06-30-21 Michigan State 9930 01-31-22 Minnesota NELAP 042-999-487 12-31-21 Missouri State 450 01-31-22 Montana (DW) State 0098 01-01-22 Montana (UST) State 0098 01-01-22 Nebraska State NE-OS-32-17 01-31-20 * Nevada State PA000092019-3 07-31-21 New Hampshire NELAP 273019 01-10-22 New Jersey NELAP PA011 06-30-21 New York NELAP 10670 04-01-21 North Carolina (DW) State 42705 07-31-21 North Carolina (WW/SW) State 521 12-31-21 North Dakota State R-205 01-31-22 Oklahoma NELAP R-205 08-31-21 Oregon NELAP PA200001-018 09-12-21 PALA Canada 1978 05-08-21 Pennsylvania NELAP 36-00037 01-31-22 Rhode Island State LA000338 01-31-22 South Carolina State 89002002 01-31-22 Tennessee State 02838 01-31-22 Texas NELAP T104704194-20-38 08-31-21 Utah NELAP PA000092019-16 03-01-22 Vermont State VT - 36037 10-29-21 * Accreditation/Certification renewal pending - accreditation/certification considered valid. Eurofins TestAmerica, Savannah Page 27 of 28 3/26/2021 Accreditation/Certification Summary Client: Civil & Environmental Consultants Inc Job ID: 680-196438-4 Laboratory: Eurofins Lancaster Laboratories Env, LLC (Continued) All accreditations/certifications held by this laboratory are listed. Not all accreditations/certifications are applicable to this report. Authority Program Identification Number Expiration Date Virginia NELAP 10561 06-14-21 Washington State C457 04-11-21 West Virginia (DW) State 9906 C 12-31-21 West Virginia DEP State 055 06-30-21 Wyoming State 8TMS-L 01-31-22 Wyoming (UST) A2LA 1.01 11-30-22 Laboratory: Eurofins TestAmerica, Pittsburgh The accreditations/certifications listed below are applicable to this report. Authority Program Identification Number Expiration Date North Carolina (WW/SW) State 434 12-31-21 Eurofins TestAmerica, Savannah Page 28 of 28 3/26/2021 Draft — Hydrogeological Conceptual Site Model Update — Badin Business Park 680-197627-1; BBP Temporary Wells EHS Support LLC Review your project results through �TotaAccesss Visit us at: wwweurofinsus.comfEnv titieurofins Environment Testing America ANALYTICAL REPORT Eurofins TestAmerica, Savannah 5102 LaRoche Avenue Savannah, GA 31404 Tel: (912)354-7858 Laboratory Job ID: 680-197627-1 Client Project/Site: BBP Temporary Wells r: Civil & Environmental Consultants Inc 2704 Cherokee Farm Way Suite 101 Knoxville, Tennessee 37920 Attn: Michael Worden Authorized for release by: 4/26/2021 3:21:42 PM Sheila Hoffman, Project Manager II (912)250-0279 Sheila.Hoffman@Eurofinset.com The test results in this report meet all 2003 NELAC, 2009 TNI, and 2016 TNI requirements for accredited parameters, exceptions are noted in this report. This report may not be reproduced except in full, and with written approval from the laboratory. For questions please contact the Project Manager at the e-mail address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature. Results relate only to the items tested and the sample(s) as received by the laboratory. Method Summary Client: Civil & Environmental Consultants Inc Job ID: 680-197627-1 Project/Site: BBP Temporary Wells Method Method Description Protocol Laboratory 300.0-1993 R2.1 Anions, Ion Chromatography MCAWW TAL SAV D7511-12 Total Cyanide ASTM ELLE OIA-1677 Cyanide, Free (Flow Injection) 01 CORP TAL PIT Protocol References: ASTM = ASTM International MCAWW = "Methods For Chemical Analysis Of Water And Wastes", EPA-600/4-79-020, March 1983 And Subsequent Revisions. 01 CORP = 01 Corporation Instrument Manual. Laboratory References: ELLE = Eurofins Lancaster Laboratories Env, LLC, 2425 New Holland Pike, Lancaster, PA 17601, TEL (717)656-2300 TAL PIT = Eurofins TestAmerica, Pittsburgh, 301 Alpha Drive, RIDC Park, Pittsburgh, PA 15238, TEL (412)963-7058 TAL SAV = Eurofins TestAmerica, Savannah, 5102 LaRoche Avenue, Savannah, GA 31404, TEL (912)354-7858 Eurofins TestAmerica, Savannah Page 2 of 23 4/26/2021 Sample Summary Client: Civil & Environmental Consultants Inc Job ID: 680-197627-1 Project/Site: BBP Temporary Wells Lab Sample ID Client Sample ID Matrix Collected Received Asset ID 680-197627-1 0ut005-TW001 Water 04/13/21 09:50 04/14/21 10:30 680-197627-2 0ut005-TW002 Water 04/13/21 10:35 04/14/21 10:30 680-197627-3 0ut005-TW003 Water 04/13/21 11:15 04/14/21 10:30 680-197627-4 0ut005-TW004 Water 04/13/21 12:00 04/14/21 10:30 680-197627-5 0ut005-TW005 Water 04/13/21 12:40 04/14/21 10:30 Eurofins TestAmerica, Savannah Page 3 of 23 4/26/2021 Definitions/Glossary Client: Civil & Environmental Consultants Inc Job ID: 680-197627-1 Project/Site: BBP Temporary Wells Qualifiers HPLC/IC Qualifier Qualifier Description J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. Glossary Abbreviation These commonly used abbreviations may or may not be present in this report. Listed under the "D" column to designate that the result is reported on a dry weight basis %R Percent Recovery CFL Contains Free Liquid CFU Colony Forming Unit CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) Dil Fac Dilution Factor DL Detection Limit (DoD/DOE) DL, RA, RE, IN Indicates a Dilution, Re -analysis, Re -extraction, or additional Initial metals/anion analysis of the sample DLC Decision Level Concentration (Radiochemistry) EDL Estimated Detection Limit (Dioxin) LOD Limit of Detection (DoD/DOE) LOQ Limit of Quantitation (DoD/DOE) MCL EPA recommended "Maximum Contaminant Level" MDA Minimum Detectable Activity (Radiochemistry) MDC Minimum Detectable Concentration (Radiochemistry) MDL Method Detection Limit ML Minimum Level (Dioxin) MPN Most Probable Number MQL Method Quantitation Limit NC Not Calculated ND Not Detected at the reporting limit (or MDL or EDL if shown) NEG Negative / Absent POS Positive / Present PQL Practical Quantitation Limit PRES Presumptive QC Quality Control RER Relative Error Ratio (Radiochemistry) RL Reporting Limit or Requested Limit (Radiochemistry) RPD Relative Percent Difference, a measure of the relative difference between two points TEF Toxicity Equivalent Factor (Dioxin) TEQ Toxicity Equivalent Quotient (Dioxin) TNTC Too Numerous To Count Eurofins TestAmerica, Savannah Page 4 of 23 4/26/2021 Case Narrative Client: Civil & Environmental Consultants Inc Job ID: 680-197627-1 Project/Site: BBP Temporary Wells Job ID: 680-197627-1 Laboratory: Eurofins TestAmerica, Savannah Narrative CASE NARRATIVE Client: Civil & Environmental Consultants Inc Project: BBP Temporary Wells Report Number: 680-197627-1 With the exceptions noted as flags or footnotes, standard analytical protocols were followed in the analysis of the samples and no problems were encountered or anomalies observed. In addition all laboratory quality control samples were within established control limits, with any exceptions noted below. Each sample was analyzed to achieve the lowest possible reporting limit within the constraints of the method. In the event of interference or analytes present at high concentrations, samples may be diluted. For diluted samples, the reporting limits are adjusted relative to the dilution required. RECEIPT The samples were received on 04/14/2021; the samples arrived in good condition, properly preserved and on ice. The temperature of the coolers at receipt was 3.0 C. FREE CYANIDE Samples Out005-TW001 (680-197627-1), Out005-TW002 (680-197627-2), Out005-TW003 (680-197627-3), Out005-TW004 (680-197627-4) and Out005-TW005 (680-197627-5) were analyzed for free cyanide in accordance with 1677. The samples were analyzed on 04/16/2021. No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. ANIONS BY ION CHROMATOGRAPHY (28 DAY) Samples Out005-TW001 (680-197627-1), Out005-TW002 (680-197627-2), Out005-TW003 (680-197627-3), Out005-TW004 (680-197627-4) and Out005-TW005 (680-197627-5) were analyzed for Anions by Ion Chromatography (28 Day) in accordance with EPA Method 300.0. The samples were analyzed on 04/22/2021 and 04/23/2021. No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. CYANIDE Samples Out005-TW001 (680-197627-1), Out005-TW002 (680-197627-2), Out005-TW003 (680-197627-3), Out005-TW004 (680-197627-4) and Out005-TW005 (680-197627-5) were analyzed for cyanide in accordance with D7511-12. The samples were analyzed on 04/19/2021. No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Eurofins TestAmerica, Savannah Page 5 of 23 4/26/2021 Client Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-197627-1 Project/Site: BBP Temporary Wells Client Sample ID: Out005-TW001 Date Collected: 04/13/21 09:50 Date Received: 04/14/21 10:30 Lab Sample ID: 680-197627-1 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate 27 1.0 0.40 mg/L Fluoride 3.4 0.10 0.040 mg/L Chloride 3.2 0.50 0.20 mg/L Bromide 0.20 J 0.50 0.20 mg/L 04/23/21 18:59 1 04/23/21 18:59 1 04/22/21 18:50 1 04/22/21 18:50 1 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total Cyanide, Free 0.057 0.0060 0.0020 mg/L <0.00079 0.0020 0.00079 mg/L 04/19/21 12:47 1 04/16/21 20:10 1 Client Sample ID: Out005-TW002 Date Collected: 04/13/21 10:35 Date Received: 04/14/21 10:30 Lab Sample ID: 680-197627-2 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate 31 1.0 0.40 mg/L 04/23/21 19:11 1 Fluoride 5.5 0.10 0.040 mg/L 04/23/21 19:11 1 Chloride 3.3 0.50 0.20 mg/L 04/22/21 19:03 1 LBromide 0.22 J 0.50 0.20 mg/L 04/22/21 19:03 1 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total Cyanide, Free 0.088 0.0060 0.0020 mg/L <0.00079 0.0020 0.00079 mg/L 04/19/21 12:57 1 04/16/21 20:12 1 Client Sample ID: Out005-TW003 Date Collected: 04/13/21 11:15 Date Received: 04/14/21 10:30 Lab Sample ID: 680-197627-3 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate 27 1.0 0.40 mg/L 04/23/21 19:24 1 Fluoride 4.8 0.10 0.040 mg/L 04/23/21 19:24 1 Chloride 3.4 0.50 0.20 mg/L 04/22/21 19:15 1 Bromide 0.21 J 0.50 0.20 mg/L 04/22/21 19:15 1 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total Cyanide, Free 0.076 0.0060 0.0020 mg/L <0.00079 0.0020 0.00079 mg/L 04/19/21 12:55 1 04/16/21 20:13 1 Client Sample ID: Out005-TW004 Date Collected: 04/13/21 12:00 Date Received: 04/14/21 10:30 Lab Sample ID: 680-197627-4 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate 27 1.0 0.40 mg/L Fluoride 6.8 0.10 0.040 mg/L Chloride 3.4 0.50 0.20 mg/L Bromide 0.22 J 0.50 0.20 mg/L 04/23/21 20:27 1 04/23/21 20:27 1 04/22/21 19:28 1 04/22/21 19:28 1 Eurofins TestAmerica, Savannah Page 6 of 23 4/26/2021 Client Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-197627-1 Project/Site: BBP Temporary Wells Client Sample ID: Out005-TW004 Date Collected: 04/13/21 12:00 Date Received: 04/14/21 10:30 Lab Sample ID: 680-197627-4 Matrix: Water General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total Cyanide, Free 0.092 0.0060 <0.00079 0.0020 0.0020 mg/L 0.00079 mg/L 04/19/21 12:27 1 04/16/21 20:28 1 Client Sample ID: Out005-TW005 Date Collected: 04/13/21 12:40 Date Received: 04/14/21 10:30 Lab Sample ID: 680-197627-5 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate 25 1.0 0.40 mg/L Fluoride 1.2 0.10 0.040 mg/L Chloride 3.1 0.50 0.20 mg/L Bromide <0.20 0.50 0.20 mg/L General Chemistry Analyte Result Qualifier 04/23/21 21:05 1 04/23/21 21:05 1 04/22/21 19:41 1 04/22/21 19:41 1 RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total Cyanide, Free <0.0020 0.0060 0.0020 mg/L 04/19/21 12:29 1 <0.00079 0.0020 0.00079 mg/L 04/16/21 20:30 1 Eurofins TestAmerica, Savannah Page 7 of 23 4/26/2021 QC Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-197627-1 Project/Site: BBP Temporary Wells Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Lab Sample ID: MB 680-665346/2 Matrix: Water Analysis Batch: 665346 Client Sample ID: Method Blank Prep Type: Total/NA MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Chloride <0.20 0.50 0.20 mg/L 04/22/21 12:48 1 Bromide <0.20 0.50 0.20 mg/L 04/22/21 12:48 1 Lab Sample ID: LCS 680-665346/3 Matrix: Water Analysis Batch: 665346 Analyte Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Chloride 10.0 10.1 mg/L Bromide 10.0 10.0 mg/L Lab Sample ID: LCSD 680-665346/4 Matrix: Water Analysis Batch: 665346 Analyte 101 90-110 100 90-110 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Spike LCSD LCSD %Rec. RPD Added Result Qualifier Unit D %Rec Limits RPD Limit Chloride Bromide Lab Sample ID: MB 680-665554/2 Matrix: Water Analysis Batch: 665554 Analyte 10.0 10.1 mg/L 101 90-110 0 15 10.0 10.0 mg/L 100 90-110 0 15 Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate <0.40 1.0 0.40 mg/L Fluoride <0.040 0.10 0.040 mg/L Chloride <0.20 0.50 0.20 mg/L Bromide <0.20 0.50 0.20 mg/L Lab Sample ID: LCS 680-665554/3 Matrix: Water Analysis Batch: 665554 Analyte 04/23/21 12:26 1 04/23/21 12:26 1 04/23/21 12:26 1 04/23/21 12:26 1 Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Sulfate 10.0 9.76 mg/L 98 90_ 110 Fluoride 2.00 1.84 mg/L 92 90_ 110 Chloride 10.0 10.1 mg/L 101 90 _ 110 Bromide 10.0 9.99 mg/L 100 90_ 110 Lab Sample ID: LCSD 680-665554/4 Matrix: Water Analysis Batch: 665554 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Spike LCSD LCSD %Rec. RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Sulfate 10.0 9.97 mg/L 100 90 - 110 2 15 Fluoride 2.00 1.88 mg/L 94 90 - 110 2 15 Chloride 10.0 10.1 mg/L 101 90-110 0 15 Bromide 10.0 9.98 mg/L 100 90 - 110 0 15 Eurofins TestAmerica, Savannah Page 8 of 23 4/26/2021 QC Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-197627-1 Project/Site: BBP Temporary Wells Method: 300.0-1993 R2.1 - Anions, Ion Chromatography (Continued) Lab Sample ID: MB 680-665555/33 Matrix: Water Analysis Batch: 665555 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Sulfate <0.40 1.0 0.40 mg/L 04/23/21 19:49 1 Fluoride <0.040 0.10 0.040 mg/L 04/23/21 19:49 1 Chloride <0.20 0.50 0.20 mg/L 04/23/21 19:49 1 Bromide <0.20 0.50 0.20 mg/L 04/23/21 19:49 1 Lab Sample ID: LCS 680-665555/34 Matrix: Water Analysis Batch: 665555 Analyte Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Sulfate 10.0 9.71 mg/L 97 90 - 110 Fluoride 2.00 1.96 mg/L 98 90 - 110 Chloride 10.0 10.0 mg/L 100 90 - 110 Bromide 10.0 9.96 mg/L 100 90. 110 Lab Sample ID: LCSD 680-665555/35 Matrix: Water Analysis Batch: 665555 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Spike LCSD LCSD %Rec. RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Sulfate 10.0 9.81 mg/L 98 90 _ 110 1 15 Fluoride 2.00 1.98 mg/L 99 90 _ 110 1 15 Chloride 10.0 10.1 mg/L 101 90 _ 110 0 15 Bromide 10.0 9.98 mg/L 100 90 _ 110 0 15 Lab Sample ID: 680-197627-4 MS Matrix: Water Analysis Batch: 665555 Analyte Client Sample ID: Out005-TW004 Prep Type: Total/NA Sample Sample Spike MS MS %Rec. Result Qualifier Added Result Qualifier Unit D %Rec Limits Sulfate 27 10.0 37.0 mg/L 101 80 _ 120 Fluoride 6.8 2.00 8.56 mg/L 90 80 _ 120 Chloride 3.4 10.0 13.9 mg/L 104 80 _ 120 Bromide 0.22 J 10.0 10.4 mg/L 102 80 - 120 Lab Sample ID: 680-197627-4 MSD Matrix: Water Analysis Batch: 665555 Client Sample ID: Out005-TW004 Prep Type: Total/NA Sample Sample Spike MSD MSD %Rec. RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Sulfate 27 10.0 37.0 mg/L 101 80 - 120 0 15 Fluoride 6.8 2.00 8.60 mg/L 92 80. 120 0 15 Chloride 3.4 10.0 13.9 mg/L 105 80. 120 1 15 Bromide 0.22 J 10.0 10.5 mg/L 102 80 _ 120 0 15 Eurofins TestAmerica, Savannah Page 9 of 23 4/26/2021 QC Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-197627-1 Project/Site: BBP Temporary Wells Method: D7511-12 - Total Cyanide Lab Sample ID: MB 410-116346/17 Matrix: Water Analysis Batch: 116346 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Total <0.0020 Lab Sample ID: LCS 410-116346/16 Matrix: Water Analysis Batch: 116346 Analyte 0.0060 0.0020 mg/L 04/19/21 12:19 1 Client Sample ID: Lab Control Sample El Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Cyanide, Total 0.0400 0.0399 mg/L 100 84 _ 116 Method: OIA-1677 - Cyanide, Free (Flow Injection) Lab Sample ID: MB 180-353688/41 Matrix: Water Analysis Batch: 353688 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Free <0.00079 0.0020 0.00079 mg/L 04/16/21 19:26 1 Lab Sample ID: MB 180-353688/59 Matrix: Water Analysis Batch: 353688 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Free <0.00079 0.0020 0.00079 mg/L 04/16/21 19:53 1 Lab Sample ID: MB 180-353688/81 Matrix: Water Analysis Batch: 353688 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Free <0.00079 0.0020 0.00079 mg/L 04/16/21 20:27 1 Lab Sample ID: LCS 180-353688/40 Matrix: Water Analysis Batch: 353688 Analyte Cyanide, Free Lab Sample ID: LCS 180-353688/58 Matrix: Water Analysis Batch: 353688 Analyte Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits 0.0500 0.0554 mg/L 111 82 - 132 Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Cyanide, Free 0.0500 0.0583 mg/L 117 82 _ 132 Eurofins TestAmerica, Savannah Page 10 of 23 4/26/2021 QC Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-197627-1 Project/Site: BBP Temporary Wells Method: OIA-1677 - Cyanide, Free (Flow Injection) (Continued) FLab Sample ID: LCS 180-353688/80 Matrix: Water Analysis Batch: 353688 LAnalyte Cyanide, Free Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits 0.0500 0.0555 mg/L 111 82 - 132 Eurofins TestAmerica, Savannah Page 11 of 23 4/26/2021 QC Association Summary Client: Civil & Environmental Consultants Inc Project/Site: BBP Temporary Wells HPLC/IC Job ID: 680-197627-1 Analysis Batch: 665346 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 680-197627-1 680-197627-2 680-197627-3 680-197627-4 680-197627-5 MB 680-665346/2 LCS 680-665346/3 LCSD 680-665346/4 Analysis Batch: 665554 Lab Sample ID Out005-TW001 Out005-TW002 Out005-TW003 Out005-TW004 Out005-TW005 Method Blank Lab Control Sample Lab Control Sample Dup Client Sample ID Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Prep Type Matrix 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 Method Prep Batch 680-197627-1 680-197627-2 680-197627-3 MB 680-665554/2 LCS 680-665554/3 LCSD 680-665554/4 Analysis Batch: 665555 Lab Sample ID Out005-TW001 Out005-TW002 Out005-TW003 Method Blank Lab Control Sample Lab Control Sample Dup Client Sample ID Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Prep Type Matrix 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 Method Prep Batch 680-197627-4 680-197627-5 MB 680-665555/33 LCS 680-665555/34 LCSD 680-665555/35 680-197627-4 MS 680-197627-4 MSD Out005-TW004 Out005-TW005 Method Blank Lab Control Sample Lab Control Sample Dup Out005-TW004 Out005-TW004 Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 General Chemistry Analysis Batch: 116346 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 680-197627-1 680-197627-2 680-197627-3 680-197627-4 680-197627-5 MB 410-116346/17 LCS 410-116346/16 Analysis Batch: 353688 Lab Sample ID Out005-TW001 Out005-TW002 Out005-TW003 Out005-TW004 Out005-TW005 Method Blank Lab Control Sample Client Sample ID Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Prep Type Matrix D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 D7511-12 Method Prep Batch 680-197627-1 680-197627-2 680-197627-3 680-197627-4 680-197627-5 MB 180-353688/41 MB 180-353688/59 MB 180-353688/81 LCS 180-353688/40 Out005-TW001 Out005-TW002 Out005-TW003 Out005-TW004 Out005-TW005 Method Blank Method Blank Method Blank Lab Control Sample Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water Total/NA Water OIA-1677 OIA-1677 OIA-1677 OIA-1677 OIA-1677 OIA-1677 OIA-1677 OIA-1677 OIA-1677 Eurofins TestAmerica, Savannah Page 12 of 23 4/26/2021 QC Association Summary Client: Civil & Environmental Consultants Inc Job ID: 680-197627-1 Project/Site: BBP Temporary Wells General Chemistry (Continued) Analysis Batch: 353688 (Continued) Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch LCS 180-353688/58 LCS 180-353688/80 Lab Control Sample Lab Control Sample Total/NA Water Total/NA Water OIA-1677 OIA-1677 Eurofins TestAmerica, Savannah Page 13 of 23 4/26/2021 Lab Chronicle Client: Civil & Environmental Consultants Inc Job ID: 680-197627-1 Project/Site: BBP Temporary Wells Client Sample ID: Out005-TW001 Date Collected: 04/13/21 09:50 Date Received: 04/14/21 10:30 Lab Sample ID: 680-197627-1 Matrix: Water Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 665346 04/22/21 18:50 UI TAL SAV Instrument ID: CICK Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 665554 04/23/21 18:59 RKJ TAL SAV Instrument ID: CICK Total/NA Analysis D7511-12 1 116346 04/19/21 12:47 UJE2 ELLE Instrument ID: 19369 Total/NA Analysis OIA-1677 1 353688 04/16/21 20:10 GRB TAL PIT Instrument ID: ALPKEM3 Client Sample ID: Out005-TW002 Date Collected: 04/13/21 10:35 Date Received: 04/14/21 10:30 Lab Sample ID: 680-197627-2 Matrix: Water Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 665346 04/22/21 19:03 UI TAL SAV Instrument ID: CICK Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 665554 04/23/21 19:11 RKJ TAL SAV Instrument ID: CICK Total/NA Analysis D7511-12 1 116346 04/19/21 12:57 UJE2 ELLE Instrument ID: 19369 Total/NA Analysis OIA-1677 1 353688 04/16/21 20:12 GRB TAL PIT Instrument ID: ALPKEM3 Client Sample ID: Out005-TW003 Date Collected: 04/13/21 11:15 Date Received: 04/14/21 10:30 Lab Sample ID: 680-197627-3 Matrix: Water Prep Type Batch Batch Type Method Run Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 665346 04/22/21 19:15 UI TAL SAV Instrument ID: LICK Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 665554 04/23/21 19:24 RKJ TAL SAV Instrument ID: CICK Total/NA Analysis D7511-12 1 116346 04/19/21 12:55 UJE2 ELLE Instrument ID: 19369 Total/NA Analysis OIA-1677 1 353688 04/16/21 20:13 GRB TAL PIT Instrument ID: ALPKEM3 Client Sample ID: Out005-TW004 Date Collected: 04/13/21 12:00 Date Received: 04/14/21 10:30 Lab Sample ID: 680-197627-4 Matrix: Water Prep Type Batch Batch Dil Initial Final Batch Prepared Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 665346 04/22/21 19:28 UI TAL SAV Instrument ID: CICK Eurofins TestAmerica, Savannah Page 14 of 23 4/26/2021 Lab Chronicle Client: Civil & Environmental Consultants Inc Job ID: 680-197627-1 Project/Site: BBP Temporary Wells Client Sample ID: Out005-TW004 Date Collected: 04/13/21 12:00 Date Received: 04/14/21 10:30 Lab Sample ID: 680-197627-4 Matrix: Water Batch Batch Dil Initial Final Batch Prepared Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 665555 04/23/21 20:27 UI TAL SAV Total/NA Analysis D7511-12 1 116346 04/19/21 12:27 UJE2 ELLE Instrument ID: 19369 Total/NA Analysis OIA-1677 Instrument ID: ALPKEM3 1 353688 04/16/21 20:28 GRB TAL PIT Client Sample ID: Out005-TW005 Date Collected: 04/13/21 12:40 Date Received: 04/14/21 10:30 Lab Sample ID: 680-197627-5 Matrix: Water Prep Type Batch Batch Dil Initial Final Batch Prepared Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Total/NA Total/NA Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 665346 04/22/21 19:41 UI TAL SAV Instrument ID: CICK Analysis 300.0-1993 R2.1 1 5 mL 5 mL 665555 04/23/21 21:05 UI TAL SAV Instrument ID: CICK Analysis D7511-12 1 116346 04/19/21 12:29 UJE2 ELLE Instrument ID: 19369 Analysis OIA-1677 1 353688 04/16/21 20:30 GRB TAL PIT Instrument ID: ALPKEM3 Laboratory References: ELLE = Eurofins Lancaster Laboratories Env, LLC, 2425 New Holland Pike, Lancaster, PA 17601, TEL (717)656-2300 TAL PIT = Eurofins TestAmerica, Pittsburgh, 301 Alpha Drive, RIDC Park, Pittsburgh, PA 15238, TEL (412)963-7058 TAL SAV = Eurofins TestAmerica, Savannah, 5102 LaRoche Avenue, Savannah, GA 31404, TEL (912)354-7858 Eurofins TestAmerica, Savannah Page 15 of 23 4/26/2021 E£ 1$ O v 0) CJ oJ a) 0 .c 0 Chain of Custody Record (uc43011+ou) NQ,IFAV'.CN.RD- tt91. • - a:z naoao 09¢ .plu..(DFWl-ZL Rsca Page 16 of 23 Deliverable Requested: I, II, Ill, IV, Other (specify) 4/26/2021 Chain of Custody Record COC No: 680-124854-46697.1 a gOad Preservation Codes: A - HCL M - Hexane B-NaOH N - None C - Zn Acetate 0 • AsNa02 D - Nitric Acid P - Na204S E - NaHSO4 O - Na2S03 F - Me0H R - Na2S203 G • Amchlor S - H2SO4 H - Ascorbic Acid T - TSP Dodecahydrate I - Ice U - Acetone J - DI Water V - MCAA K - EDTA W - pH 4-5 L - EDA Z - other (specify) Other: 0 0 z o c C llhI/IIII//IIIIIIIIIIllIiIllhIIII Sample Disposal (A fee may e a sed if samples are retained longer than 1 month) Return To Client Disposal By Lab I= Archive For Months Special Instructions/QC Requirements: 'Empty Kit Relinquished by: (Date: (Time: !Method of Shipment: c n 0 U Company c n V Cooler Temperatures) °C and Other Remarks ll ,..,J r7 -:b--' -) 0 'J ? E •l•• m-... 0 CDE— E 0 +Carrier Tracking No(s): 0 a sd cn Analysis Requested sieuleluoo 4o agwnN lelol .— tY n _,J v Received Received by: Lab PM: Hoffman, Sheila B E o 7 W .. U)ai W to rr (uoµ3alulmold) algelieny 'ap!ueAD - LL91 ..$` x �--? �-'•IfIC\Ci 1 i � apuonld - ad210 00£ 82 W apiueAJlelol- ZL SL LLO. `X,� X 11 .] `C• �J,,��? , Ev 0 FF Company Custody Seal Nc ION Jo set eidwes palallli pie P1sibbrgazard Identification Non -Hazard U Flammable Skin Irritant = Poison 8 = Unknown =Radiological Deliverable Requested: I, II, III, IV, Other (specify) a Due Date Requested: TAT Requested (days ] (Compliance Project: n Yes ,1 No PO #: 300-226.0012 Matrix (Wmeeler. 5=wIN. owesteloll, BT.TIssue. MNr) Phone: 9 1 o - V6 -060 / J a N E A.. w~Utz o Date/Ti e: ` P i l 3i a t 0 (Company: Civil & Environmental Consultants Inc 2 In 11) 0 10---- V4(I. 0 3 0 a p 0 y Sample Date 1-E 1 Client Information Client Contact: Michael Worden Address: 2704 Cherokee Farm Way Suite 101 y c y Y O N m Z C. F a Email: mworden@cecinc.com Project Name: BBP Temporary Wells in Sam le Identification to © Q 0 f 14 O 01 ► 0 V 0 23 1 r^ II.J Ln© O a Relinquished by // r Ic k / JI Relinquished by,� 1 /. (i )l�-k:�lLi1J1 Relinquished by: Custody Seals Intact: A Yes -1 No 0 0 0 Page 17 of 23 4/26/2021 u N II Chain of Custody Record Charlotte 229 tiff eurofins Environment Testing America ociu-lututr unain or L:US ody Sampler. ��^i �� � t t WI kVA Lab PM: Hoffman, Sheila B Cartier Tracking No(s): COC No: 680-124854-46697.1 Client Contact Michael Worden Pt ona CHO, g7 0 ( Et ta : Sheila.Hoffman@Eurofinset.com Stab of Origin: Page: Page 1 of 1 Company Civil & Environmental Consultants Inc PWSID: Analysis Requested Job #: Address: 2704 Cherokee Farm Way Suite 101 Due Date Requested: + o _ o $ m 8t5 D7511_12 - Total Cyanide __- 300 ORGFM 28D-Fluoride 1677 - Cyanide, Available (Flow Injection) Total Number of containers Preservation Codes: A-HCL M- Hexane - NaOH N -Nona C-Zn Acetate O-AsNa02 D - Nitric Add P - Na204S E - NaHSO4 O - Na2SO3 F - McOH R - Na2S2O3 G - Amebic( S - H2SO4 H- Ascorbic Add T - TSP Dodecahydrate I - Ice U - Acetone J - DI Water V-MCAA K - EDTA W - pH 4-5 L-EDA Z- other (spedry) Other: City8 Knoxville TAT Requested (days): .C± CJ �''���""''������-WittJJJ``�" Stale, Zip: TN. 37920 Compliance Project A Yes A No Phone: #; 3O0-226.0012 Email: mworden@cecinc.com WO #: Project Name: BBPTemporaryWells Project #: 68025248 Site: r �. 1/ c,� : l SSOW#: tthh Sample Identification Sample Date Sample Time Sample Type (C=comp, G grab) Matrix (..—..+. o-.. er-T....w+ i B a S dal Instructions/Note: Preeervaton Code: N D 1A-t000 - "rtAan 0 1 `-{-13-2/ Co 960 Cyr Lk) IC :C x D t,-oo g - -7rA) 0eN . 16 3S -- t<<6 ( I f ©t�-cos--� _12CX) . L 10u6—Oo S cc gi nud---bos- 7-woos 19.1-tc — ........- ...e.. .....J s�, r v / V -1 X '--1 _ G Posslbla Hazard identification Da-pe Non -Hazard Flammable Skin Irritant 0 Poison B = Unknown Radiological Sample Disposal (A fee may �Retum To Client arse Disposal sed if samples are retained longer than 1 month) By Lab Archive For Months Deliverable Requested: I, II, III, IV, Other (specify) Special Instructions/QC Requirements: Empty Kit Relinquished by: ,Date: Time: 'Method of Shipment r Relinquished by. r Ai a 1 Date/Time: tr3-2) 1 sod Company ('-eG Received by t 1'. ,'�,: ( o-utol I Datemme.. 'atl 121 15ac. Company Relinquished 1 / l J I L1 vt ! t 1 Dat e �,4'`'i v Company Received by Date/Time, Company ( Relinquished by. Dateffirbe: Company P Y Received b y gi/�J 1 / `' _ C/ C��R�� l 4, Custody Seals Intact A Yes A No Custody Seal No.: Gaoler Temperature(s)°C and then Romance: O + Ver 11/01 Page 18 of 23 4/26/2021 Login Sample Receipt Checklist Client: Civil & Environmental Consultants Inc Job Number: 680-197627-1 Login Number: 197627 List Number: 1 Creator: Sims, Robert D Question List Source: Eurofins TestAmerica, Savannah Answer Comment Radioactivity wasn't checked or is </= background as measured by a survey N/A meter. The cooler's custody seal, if present, is intact. True Sample custody seals, if present, are intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable. True Cooler Temperature is recorded. True COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True Is the Field Sampler's name present on COC? True There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True Sample Preservation Verified. N/A There is sufficient vol. for all requested analyses, incl. any requested True MS/MSDs Containers requiring zero headspace have no headspace or bubble is True <6mm (1/4"). Multiphasic samples are not present. True Samples do not require splitting or compositing. True Residual Chlorine Checked. N/A Eurofins TestAmerica, Savannah Page 19 of 23 4/26/2021 Login Sample Receipt Checklist Client: Civil & Environmental Consultants Inc Job Number: 680-197627-1 Login Number: 197627 List Number: 2 Creator: Foreman, Leah M Question List Source: Eurofins Lancaster Laboratories Env List Creation: 04/15/21 01:13 PM Answer Comment Radioactivity wasn't checked or is </= background as measured by a survey N/A meter. The cooler's custody seal is intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable (</=6C, not frozen). True Cooler Temperature is recorded. True WV: Container Temperature is acceptable (</=6C, not frozen). N/A WV: Container Temperature is recorded. N/A COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True There is sufficient vol. for all requested analyses. True Multiphasic samples are not present. True Samples do not require splitting or compositing. N/A Is the Field Sampler's name present on COC? True Sample Preservation Verified. N/A Residual Chlorine Checked. N/A Sample custody seals are intact. N/A Eurofins TestAmerica, Savannah Page 20 of 23 4/26/2021 Login Sample Receipt Checklist Client: Civil & Environmental Consultants Inc Job Number: 680-197627-1 Login Number: 197627 List Number: 3 Creator: Watson, Debbie Question List Source: Eurofins TestAmerica, Pittsburgh List Creation: 04/15/21 02:13 PM Answer Comment Radioactivity wasn't checked or is </= background as measured by a survey N/A meter. The cooler's custody seal, if present, is intact. True Sample custody seals, if present, are intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable. True Cooler Temperature is recorded. True COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True Is the Field Sampler's name present on COC? N/A There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True Sample Preservation Verified. True There is sufficient vol. for all requested analyses, incl. any requested True MS/MSDs Containers requiring zero headspace have no headspace or bubble is True <6mm (1/4"). Multiphasic samples are not present. True Samples do not require splitting or compositing. True Residual Chlorine Checked. N/A Eurofins TestAmerica, Savannah Page 21 of 23 4/26/2021 Accreditation/Certification Summary Client: Civil & Environmental Consultants Inc Project/Site: BBP Temporary Wells Laboratory: Eurofins TestAmerica, Savannah The accreditations/certifications listed below are applicable to this report. Job ID: 680-197627-1 Authority Program Identification Number Expiration Date North Carolina (WW/SW) State 269 12-31-21 Laboratory: Eurofins Lancaster Laboratories Env, LLC All accreditations/certifications held by this laboratory are listed. Not all accreditations/certifications are applicable to this report. Authority Program Identification Number Expiration Date A2LA Dept. of Defense ELAP 1.01 11-30-22 Alaska State PA00009 06-30-22 Alaska (UST) State 17-027 01-31-21 * Arizona State AZ0780 03-12-22 Arkansas DEQ State 19-053-0 08-09-21 California State 2792 01-31-22 Colorado State PA00009 06-30-21 Connecticut State PH-0746 06-30-21 DE Haz. Subst. Cleanup Act (HSCA) State 019-006 (PA cert) 01-31-22 Delaware (DW) State N/A 02-01-22 Florida NELAP E87997 06-30-21 Hawaii State N/A 01-31-22 Illinois NELAP 004559 01-31-22 Iowa State 361 03-02-22 Kansas NELAP E-10151 10-31-21 Kentucky (DW) State KY90088 01-01-22 Kentucky (UST) State 1.01 11-30-22 Kentucky (WW) State KY90088 12-31-21 Louisiana NELAP 02055 06-30-21 Maine State 2019012 03-12-22 Maryland State 100 06-30-22 Massachusetts State M-PA009 06-30-21 Michigan State 9930 01-31-22 Minnesota NELAP 042-999-487 12-31-21 Missouri State 450 01-31-22 Montana (DW) State 0098 01-01-22 Montana (UST) State 0098 01-01-22 Nebraska State NE-OS-32-17 01-31-22 Nevada State PA000092019-3 07-31-21 New Hampshire NELAP 273019 01-10-22 New Jersey NELAP PA011 06-30-21 New York NELAP 10670 04-01-22 North Carolina (DW) State 42705 07-31-21 North Carolina (WW/SW) State 521 12-31-21 North Dakota State R-205 01-31-22 Oklahoma NELAP R-205 08-31-21 Oregon NELAP PA200001-018 09-12-21 PALA Canada 1978 05-08-21 Pennsylvania NELAP 36-00037 01-31-22 Rhode Island State LA000338 01-31-22 South Carolina State 89002002 01-31-22 Tennessee State 02838 01-31-22 Texas NELAP T104704194-20-38 08-31-21 Utah NELAP PA000092019-16 03-01-22 * Accreditation/Certification renewal pending - accreditation/certification considered valid. Eurofins TestAmerica, Savannah Page 22 of 23 4/26/2021 Accreditation/Certification Summary Client: Civil & Environmental Consultants Inc Project/Site: BBP Temporary Wells Laboratory: Eurofins Lancaster Laboratories Env, LLC (Continued) All accreditations/certifications held by this laboratory are listed. Not all accreditations/certifications are applicable to this report. Job ID: 680-197627-1 Authority Program Identification Number Expiration Date Vermont State VT - 36037 10-29-21 Virginia NELAP 10561 06-14-21 Washington State C457 04-12-22 West Virginia (DW) State 9906 C 12-31-21 West Virginia DEP State 055 06-30-21 Wyoming State BTMS-L 01-31-22 Wyoming (UST) A2LA 1.01 11-30-22 Laboratory: Eurofins TestAmerica, Pittsburgh The accreditations/certifications listed below are applicable to this report. Authority Program Identification Number Expiration Date North Carolina (WW/SW) State 434 12-31-21 Eurofins TestAmerica, Savannah Page 23 of 23 4/26/2021 Draft — Hydrogeological Conceptual Site Model Update — Badin Business Park 2019-02-07 EHS Support LLC Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 February 21, 2019 Michael W. Worden Environeering, Inc. 16100 Cairnway Suite 320 Houston, TX 77084 RE: Project: Outfal 1005-SW Pace Project No.: 92416983 Dear Michael Worden: Enclosed are the analytical results for sample(s) received by the laboratory on February 08, 2019. The results relate only to the samples included in this report. Results reported herein conform to the most current, applicable TNI/NELAC standards and the laboratory's Quality Assurance Manual, where applicable, unless otherwise noted in the body of the report. A revised report is being submitted on 2/21/19 to revise a sample ID, per client request. If you have any questions concerning this report, please feel free to contact me. Sincerely, /ritec, Nicole Gasiorowski nicole.gasiorowski@pacelabs.com (704)875-9092 Project Manager Enclosures REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 1 of 22 CERTIFICATIONS Project: O u tfa l l 005-SW Pace Project No.: 92416983 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Asheville Certification Ds 2225 Riverside Drive, Asheville, NC 28804 Florida/NELAP Certification #: E87648 Massachusetts Certification #: M-NC030 North Carolina Drinking Water Certification #: 37712 North Carolina Wastewater Certification #: 40 South Carolina Certification #: 99030001 VirginiaNELAP Certification #: 460222 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 2 of 22 SAMPLE SUMMARY Project: O u tfa l l 005-SW Pace Project No.: 92416983 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Lab ID Sample ID Matrix Date Collected Date Received 92416983001 0ut005-01-2.510 Water 02/07/19 09:30 02/08/19 08:50 92416983002 0ut005-02-NEW S138KV Water 02/07/19 09:45 02/08/19 08:50 92416983003 0ut005-03-6.900 Water 02/07/19 10:00 02/08/19 08:50 92416983004 0ut005-04-6.500 Water 02/07/19 10:20 02/08/19 08:50 92416983005 0ut005-05-NEW E65 Water 02/07/19 10:45 02/08/19 08:50 92416983006 0ut005-06-2.400 Water 02/07/19 11:15 02/08/19 08:50 92416983007 0ut005-07-2.210 Water 02/07/19 11:30 02/08/19 08:50 92416983008 0ut005-08-2.200 Water 02/07/19 11:50 02/08/19 08:50 92416983009 0ut005-09-2.100 Water 02/07/19 12:05 02/08/19 08:50 92416983010 0ut005-10-6.100 Water 02/07/19 12:50 02/08/19 08:50 92416983011 0ut005-11-6.000 Water 02/07/19 13:20 02/08/19 08:50 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 3 of 22 SAMPLE ANALYTE COUNT Project: O u tfa l l 005-SW Pace Project No.: 92416983 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Lab ID Sample ID Analytes Method Analysts Reported Laboratory 92416983001 0ut005-01-2.510 92416983002 0ut005-02-NEW S138KV 92416983003 0ut005-03-6.900 92416983004 0ut005-04-6.500 92416983005 0ut005-05-NEW E65 92416983006 0ut005-06-2.400 92416983007 0ut005-07-2.210 92416983008 0ut005-08-2.200 92416983009 0ut005-09-2.100 92416983010 0ut005-10-6.100 92416983011 0ut005-11-6.000 EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA 9012E DMN 1 PASI-A EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA 9012E DMN 1 PASI-A EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA 9012E DMN 1 PASI-A EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA 9012E DMN 1 PASI-A EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA 9012E DMN 1 PASI-A EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA 9012E DMN 1 PASI-A EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA 9012E DMN 1 PASI-A EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA 9012E DMN 1 PASI-A EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA 9012E DMN 1 PASI-A EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA 9012E DMN 1 PASI-A EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA 9012E DMN 1 PASI-A REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 4 of 22 ANALYTICAL RESULTS Project: O u tfa l l 005-SW Pace Project No.: 92416983 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-01-2.510 Lab ID: 92416983001 Collected: 02/07/19 09:30 Received: 02/08/19 08:50 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 5.7 mg/L 0.40 0.20 4 02/10/19 10:06 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.28 mg/L 0.024 0.012 3 02/12/19 11:17 02/12/19 18:35 57-12-5 M1 REPORT OF LABORATORY ANALYSIS Date: 02/21/2019 11:32 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 5 of 22 ANALYTICAL RESULTS Project: O u tfa l l 005-SW Pace Project No.: 92416983 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-02-NEW S138KV Lab ID: 92416983002 Collected: 02/07/19 09:45 Received: 02/08/19 08:50 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 0.35 mg/L 0.10 0.050 1 02/10/19 02:05 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide ND mg/L 0.0080 0.0040 1 02/12/19 11:17 02/12/19 18:15 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 02/21/2019 11:32 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 6 of 22 ANALYTICAL RESULTS Project: O u tfa l l 005-SW Pace Project No.: 92416983 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-03-6.900 Lab ID: 92416983003 Collected: 02/07/19 10:00 Received: 02/08/19 08:50 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 0.076J mg/L 0.10 0.050 1 02/10/19 02:21 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide ND mg/L 0.0080 0.0040 1 02/12/19 11:17 02/12/19 18:20 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 02/21/2019 11:32 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 7 of 22 ANALYTICAL RESULTS Project: O u tfa l l 005-SW Pace Project No.: 92416983 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-04-6.500 Lab ID: 92416983004 Collected: 02/07/19 10:20 Received: 02/08/19 08:50 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 0.080J mg/L 0.10 0.050 1 02/10/19 03:23 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide ND mg/L 0.0080 0.0040 1 02/12/19 11:17 02/12/19 18:20 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 02/21/2019 11:32 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 8 of 22 ANALYTICAL RESULTS Project: O u tfa l l 005-SW Pace Project No.: 92416983 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-05-NEW E65 Lab ID: 92416983005 Collected: 02/07/19 10:45 Received: 02/08/19 08:50 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 3.9 mg/L 0.10 0.050 1 02/10/19 03:38 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.0073J mg/L 0.0080 0.0040 1 02/12/19 11:17 02/12/19 18:21 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 02/21/2019 11:32 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 9 of 22 ANALYTICAL RESULTS Project: O u tfa l l 005-SW Pace Project No.: 92416983 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-06-2.400 Lab ID: 92416983006 Collected: 02/07/19 11:15 Received: 02/08/19 08:50 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 4.5 mg/L 0.10 0.050 1 02/10/19 03:54 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.21 mg/L 0.016 0.0080 2 02/12/19 11:17 02/12/19 18:37 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 02/21/2019 11:32 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 10 of 22 ANALYTICAL RESULTS Project: O u tfa l l 005-SW Pace Project No.: 92416983 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-07-2.210 Lab ID: 92416983007 Collected: 02/07/19 11:30 Received: 02/08/19 08:50 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 4.6 mg/L 0.10 0.050 1 02/10/19 04:09 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.16 mg/L 0.016 0.0080 2 02/12/19 11:17 02/12/19 18:40 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 02/21/2019 11:32 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 11 of 22 ANALYTICAL RESULTS Project: O u tfa l l 005-SW Pace Project No.: 92416983 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-08-2.200 Lab ID: 92416983008 Collected: 02/07/19 11:50 Received: 02/08/19 08:50 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 4.5 mg/L 0.10 0.050 1 02/10/19 04:25 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.18 mg/L 0.016 0.0080 2 02/12/19 11:17 02/12/19 18:41 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 02/21/2019 11:32 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 12 of 22 ANALYTICAL RESULTS Project: O u tfa l l 005-SW Pace Project No.: 92416983 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-09-2.100 Lab ID: 92416983009 Collected: 02/07/19 12:05 Received: 02/08/19 08:50 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 4.5 mg/L 0.10 0.050 1 02/10/19 04:40 16984-48-8 M1 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.19 mg/L 0.0080 0.0040 1 02/12/19 11:17 02/12/19 18:25 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 02/21/2019 11:32 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 13 of 22 ANALYTICAL RESULTS Project: O u tfa l l 005-SW Pace Project No.: 92416983 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-10-6.100 Lab ID: 92416983010 Collected: 02/07/19 12:50 Received: 02/08/19 08:50 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 0.36 mg/L 0.10 0.050 1 02/10/19 05:27 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide ND mg/L 0.0080 0.0040 1 02/12/19 11:17 02/12/19 18:26 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 02/21/2019 11:32 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 14 of 22 ANALYTICAL RESULTS Project: O u tfa l l 005-SW Pace Project No.: 92416983 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-11-6.000 Lab ID: 92416983011 Collected: 02/07/19 13:20 Received: 02/08/19 08:50 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 2.7 mg/L 0.10 0.050 1 02/10/19 05:42 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.11 mg/L 0.0080 0.0040 1 02/12/19 11:17 02/12/19 18:27 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 02/21/2019 11:32 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 15 of 22 QUALITY CONTROL DATA Project: O u tfa l l 005-SW Pace Project No.: 92416983 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QC Batch: 457299 Analysis Method: EPA 300.0 Rev 2.1 1993 QC Batch Method: EPA 300.0 Rev 2.1 1993 Analysis Description: 300.0 IC Anions Associated Lab Samples: 92416983001, 92416983002, 92416983003, 92416983004, 92416983005, 92416983006, 92416983007, 92416983008, 92416983009, 92416983010, 92416983011 METHOD BLANK: 2494448 Matrix: Water Associated Lab Samples: Parameter 92416983001, 92416983002, 92416983003, 92416983004, 92416983005, 92416983006, 92416983007, 92416983008, 92416983009, 92416983010, 92416983011 Blank Reporting Units Result Limit MDL Analyzed Qualifiers Fluoride mg/L ND 0.10 0.050 02/10/19 00:01 LABORATORY CONTROL SAMPLE: 2494449 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Fluoride mg/L 2.5 2.6 103 90-110 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2494450 2494451 MS MSD 92416922005 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Fluoride mg/L ND 2.5 2.5 2.3 2.4 92 95 90-110 3 10 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2494452 2494453 MS MSD 92416983009 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Fluoride mg/L 4.5 2.5 2.5 5.0 4.5 22 3 90-110 10 10 M1 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS Date: 02/21/2019 11:32 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 16 of 22 QUALITY CONTROL DATA Project: O u tfa l l 005-SW Pace Project No.: 92416983 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QC Batch: 457402 QC Batch Method: EPA 9012E Analysis Method: EPA 9012B Analysis Description: EPA 9012B Cyanide Associated Lab Samples: 92416983001, 92416983002, 92416983003, 92416983004, 92416983005, 92416983006, 92416983007, 92416983008, 92416983009, 92416983010, 92416983011 METHOD BLANK: 2494751 Matrix: Water Associated Lab Samples: Parameter 92416983001, 92416983002, 92416983003, 92416983004, 92416983005, 92416983006, 92416983007, 92416983008, 92416983009, 92416983010, 92416983011 Blank Reporting Units Result Limit MDL Analyzed Qualifiers Cyanide mg/L ND 0.0080 0.0040 02/12/19 18:11 LABORATORY CONTROL SAMPLE: 2494752 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Cyanide mg/L 0.1 0.092 92 80-120 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2494753 2494754 MS MSD 92416983001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Cyanide mg/L 0.28 0.1 0.1 0.29 0.35 11 70 75-125 18 20 M1 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2494755 2494756 MS MSD 92416983002 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Cyanide mg/L ND 0.1 0.1 0.095 0.086 95 86 75-125 9 20 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS Date: 02/21/2019 11:32 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 17 of 22 QUALIFIERS Project: O u tfa l l 005-SW Pace Project No.: 92416983 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 DEFINITIONS DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot. ND - Not Detected at or above adjusted reporting limit. TNTC - Too Numerous To Count J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL - Adjusted Method Detection Limit. PQL - Practical Quantitation Limit. RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and bias for a specific analyte in a specific matrix. S - Surrogate 1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is a combined concentration. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD - Relative Percent Difference NC - Not Calculable. SG - Silica Gel - Clean -Up U - Indicates the compound was analyzed for, but not detected. Acid preservation may not be appropriate for 2 Chloroethylvinyl ether. A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA Method 8260. N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for each analyte is a combined concentration. Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes. TNI - The NELAC Institute. LABORATORIES PASI-A Pace Analytical Services - Asheville ANALYTE QUALIFIERS M1 Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery. REPORT OF LABORATORY ANALYSIS Date: 02/21/2019 11:32 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 18 of 22 QUALITY CONTROL DATA CROSS REFERENCE TABLE Project: O u tfa l l 005-SW Pace Project No.: 92416983 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Lab ID Sample ID Analytical QC Batch Method QC Batch Analytical Method Batch 92416983001 0ut005-01-2.510 EPA 300.0 Rev 2.1 1993 457299 92416983002 0ut005-02-NEW S138KV EPA 300.0 Rev 2.1 1993 457299 92416983003 0ut005-03-6.900 EPA 300.0 Rev 2.1 1993 457299 92416983004 0ut005-04-6.500 EPA 300.0 Rev 2.1 1993 457299 92416983005 0ut005-05-NEW E65 EPA 300.0 Rev 2.1 1993 457299 92416983006 0ut005-06-2.400 EPA 300.0 Rev 2.1 1993 457299 92416983007 0ut005-07-2.210 EPA 300.0 Rev 2.1 1993 457299 92416983008 0ut005-08-2.200 EPA 300.0 Rev 2.1 1993 457299 92416983009 0ut005-09-2.100 EPA 300.0 Rev 2.1 1993 457299 92416983010 0ut005-10-6.100 EPA 300.0 Rev 2.1 1993 457299 92416983011 0ut005-11-6.000 EPA 300.0 Rev 2.1 1993 457299 92416983001 0ut005-01-2.510 EPA 9012B 457402 EPA 9012B 457635 92416983002 0ut005-02-NEW S138KV EPA 9012B 457402 EPA 9012B 457635 92416983003 0ut005-03-6.900 EPA 9012B 457402 EPA 9012B 457635 92416983004 0ut005-04-6.500 EPA 9012B 457402 EPA 9012B 457635 92416983005 0ut005-05-NEW E65 EPA 9012B 457402 EPA 9012B 457635 92416983006 0ut005-06-2.400 EPA 9012B 457402 EPA 9012B 457635 92416983007 0ut005-07-2.210 EPA 9012B 457402 EPA 9012B 457635 92416983008 0ut005-08-2.200 EPA 9012B 457402 EPA 9012B 457635 92416983009 0ut005-09-2.100 EPA 9012B 457402 EPA 9012B 457635 92416983010 0ut005-10-6.100 EPA 9012B 457402 EPA 9012B 457635 92416983011 0ut005-11-6.000 EPA 9012B 457402 EPA 9012B 457635 REPORT OF LABORATORY ANALYSIS Date: 02/21/2019 11:32 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 19 of 22 + • ZaIaI Document Name: Sample Condition Upon Receipt{SOUR} Document Revised: February 7, 2018 Page 1 of 2 Document No,: F-CAR-CS-033-Rev.06 Issuing Authority: Pace Carolinas Quailty Office Laboratory receiving samples: Asheville ❑ Eden❑ Spies( lntj kion' UenReci!t <� Courier: ❑ Commercial Custody Scul Prucnt? Client Name: Greenwood ❑ +N P4 { rotAzr1>JC, ❑ Fed Ex OURS DIMS ❑Pace ❑Other; ❑YC]lu Huntersville ❑ Raleigh Mechanicsville❑ Project Client Seals illtdl.t7 ❑fe5 ONO Packing Material: Thermometer: Gun ID• []Bubble Wrap ❑Bubble Bagse Type of ice: e ❑ Other ❑Blue Cooler Temp (°C): , S {{ Correction Factor: Add/Subtract (°C) Ott Cooler Temp Corrected (°C): 1 .' USDA Regulated Soil (❑ N/A, water sample) Did samples origi a In a quarantine zone within the United States: CA, NY, or 5C (check maps)? ❑Yes o W©# : 9241.6983 Date/InItiais Person Examining Contents:._, Er None Biological Tissue Fro n?2 ❑Yes ❑NoJ/A Tempshould be above freezing to 6°C Panicles out of temp criteria. Samples on Ice, cooiing process has begun Did samples originate from a foreign source {intern tally, including Hawailand Puerto Rito}7 []Yes No Comments/Discrepancy: Chain of Custody Present? C IDNo ❑N/A 1. Samples Arrived within Hold Time? Yes ❑No ❑N/A 2. Short Hold Time Analysis (472 hr.)? QYas 10sr'o ❑N/A 3. Rush Turn Around Time Requested? ❑Yes „C1No ❑N/A 4. Sufficient Volume? ` ' -egs ❑No ❑N/A S. Correct Containers Used? -Pace Containers Used? e l'es 5 ❑No DNS ❑N/A ❑N/A 6. Containers Intact? ,.218s ONO ©N/A 7. Dissolved analysis: Samples Field Filtered? Des ON /A 8. Sample Labels Match COC? -Includes Date/Time/ID/Analysis Matrix: es v ar ❑No ❑N/A 9. Headspace in VOA Vials (>5-6mm)7 [Eves ❑No N/A 10. Trip Blank Present? Trip Blank Custody Seals Present? Des fYes No ❑No N/ 41 N/A 11. COMMENTS/SAMPLE DISCREPANCY Field Data Required? ❑Yes ❑No ,Lot ID of sp!it contaIner: CLIENT NOTIFICATION/RESOLUTION Person contacted! Project Manager SCURF Review: Project Manager SRF Review: Date/Time: Date: Date: Page 20 of 22 /2eAnalyl(ca/ s Document Name: Sample Condition Upon Receipt(SCUR) Document No,: F-CAR•CS-033•Rev.08 *Check mark top half of box if pH and/or dechlorination is verified and within the acceptance range for preservation samples. Exceptions: VOA, Coliform, TOC, Oil and Grease, DRO/8015 (water) DOC, LLHg **Bottom half of box is to list number of bottle Projt Document Revised: February 7, 2018 Page 1 of 2 Issuing Authority: Pace Carolinas Quality Office W4# : 9241• 6983 PM: Nf10 Due Date: 02/22/19 CLIENT: 92-Alcoa item# BP4U-125 mL Plastic Unpreserved (N/A) (CI-) BP3U-250 mL Plastic Unpreserved (N/A) BP2U-500 mL Plastic Unpreserved (N/A) BP1U-1 liter Plastic Unpreserved (N/A) BP45-125 mL Plastic H2SO4 (pH < 2) (CI-) BP3N-250 mL plastic HNO3 (pH < 2) m A 0 ro Z 61 w w d Z N u N 1.6 E N a CO • BP4C-125 mL Plast'sc NaOH [pH > 12) (CI-) 1 1 1 'N'i\\\\ \„\\\:\:: ( , 3 4 1111 5 6 7 8 l 9 10 \ i l i 11 12 \ — — — " ' AG1U-1 liter Amber Unpreserved (N/A) (CI-) AG1H-1liter Amber HCI (pH < 2) AG3U-250 mL Amber Unpreserved (N/A) (CI-) AG3A(DG3A)-250 mL Amber NH4C1(N/A)(CI-) DG9H-40 mL VGA HCI (N/A) VG9T-40 mL VOA Na252O3 (N/A) VOOU-4O ml VOA Unp (N/A) DG9P-40 mL VOA 1-13PO4 (N/A) VOAK (6 vials per kit)-5035 kit (N/A} V/GK (3 vials per kit)-VPI-I/Gas kit (N/A) SP5T-125 mL Sterile Plate (N/A — lab) SP2T-250 mL Sterile Plastic (N/A— tab) BP3A-250 mL Plastic (NH2)25O4 (9.3-9.7) AGOU-100 mL Amber Unpreserved vials (N/A) VSGU-20 mLSesntlilatlon vials (N/A) DG9U-40 mL Amber Unpreserved vials (N/A) Sample ID Type of Preservative pH Adjustment Log for Preserved Samples pH upon receipt Date preservation adjusted Time preservation adjusted Amount of Preservative added Lot p Note: Wheneve there Is a discrepancy affecting North Carolina compliance samples, a copy of his Form will be sent to the North Carolina DEHNR Certification Offfice liee21 of 22 Out of hold, incorrect preservative, out o temp, Incorrect containers. y .,: ...: INV::: :_,:.,..,..:in i-!Li.r.. p:,5 f ,.4.,. i i. 1 „, 1616-'•-1'.Uii.:7 r.to • :4,,,..•'. • . i , -1: ' -,4`q , .1i ; '17' C. -1.; e '1. .! 4:)'-'i ^, • - '... .T..,.1; Phone. ''r7 3•4,,Vrt.r.0—i ax: J Requested Due Date. P TFIX Drinking Wakw Wafer Wasle Wader Product SAMPLE ID snwsco One Character per box. woe (AZ, 0-9 /, Aie oiner Sample Ids must be unique ... 8,. " k•A c. '' -q ..., k i r. .. R _. I . m< 6 i C) rera2VAIMMIGai. Section A Si Required Client Information: Ri iff :61 -.. ik::::i : 0 L 0 .,..„ _. 0 .,-. b iiiii)i 0 • 0 - 0 g o g ?., a o R ' , o 8 g n.. —_ Ou1005-02 p6kisisgai o 59 o \ Ci'' 1:1 1;i,,. - _ .1-1 11\ik5. \:,!!•,,,1 ,.,....L,L clEit.gr E& j, (r.`2 s.ie Order #: 1 To. Michael Wordon To: CHAIN -OF -CUSTODY / Analytical Request Documen The Chain -of -Custody is a LEGAL DOCUMENT. AD relevant fields must be comple e section C red Project Information: Invoice Information: t!Et k,3"4. c'•••, F*.s. 4--s c's t•-•••• q•-.1 cs, c•-s, G--, ch, MATRIX CODE (s5e yard odes 10 let) SAMPLE TYPE IG.,,S FLAB C COM.P) : y, i \ \ ( t ..., .-. o o 1— m SIGNATURE of SAMPLER: „;!:::t. DATE Signed: 7/PT POINT Name OfSAMPLER: f_ER: V ilt -4k.*: 4t — a > —I rri m o —1 m . • _ , i,.,4 SAMPLE TEMP AT COL L ECDON Pape Project Manager nioole,gasiorowskl@pacelabs.com, Pace Profile #: 7478 2 5,1 0 ce,3 Ei — :k "N.. Attention: krvirot....) Company Name: .__7d11:Aaria27E-A, -...4 # OF CONTAINERS (0 e'7<%,—Tc-"K"7"-"?<"--><" Unpreserved [0 H2SO4 I' -.4 ,,, --11 ...., . • ..„, " ). 0 3 -@tf2woa4 9 NaOH Na2S203 co co .'Ai. Methanol Other YIN . CI x x x x x x x x x x x X 9012 Cyanide x x x X x x x x >i< 1 X X x 300.0 FTuoride r --,--,, --.1 3 ! ;,i i.:, P 17:'. • 1 Page : Of t''.'•Y: al14',L V pg.. , 4'; ;$' c t1:4 TEMP in C. tde.) ) 4iii 1. 7, 74 Residual Chlorine (YRil) Received an Ica (Y44) , ,41. ;4117 — , ,, ,' ••,, r •Q., \,,,:i -. 01 -- ,.2 - • .44-, Cuslody Sealed Ccoler (YIN) Z '' f aBt -„, ' . ( .i iniact (YiN) -"‹ ...,..-,, Ili -T I .... ' \ . Page 22 of 22 Draft — Hydrogeological Conceptual Site Model Update — Badin Business Park 2019-03-13 EHS Support LLC Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 March 17, 2019 Michael W. Worden Environeering, Inc. 16100 Cairnway Suite 320 Houston, TX 77084 RE: Project: Outfall 005 (NEW) 137-266 Pace Project No.: 92421169 Dear Michael Worden: Enclosed are the analytical results for sample(s) received by the laboratory on March 13, 2019. The results relate only to the samples included in this report. Results reported herein conform to the most current, applicable TNI/NELAC standards and the laboratory's Quality Assurance Manual, where applicable, unless otherwise noted in the body of the report. If you have any questions concerning this report, please feel free to contact me. Sincerely, Ncylit Angela Baioni angela.baioni@pacelabs.com (704)875-9092 Project Manager Enclosures REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 1 of 12 CERTIFICATIONS Project: Outfall 005 (NEW) 137-266 Pace Project No.: 92421169 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Asheville Certification Ds 2225 Riverside Drive, Asheville, NC 28804 Florida/NELAP Certification #: E87648 Massachusetts Certification #: M-NC030 North Carolina Drinking Water Certification #: 37712 North Carolina Wastewater Certification #: 40 South Carolina Certification #: 99030001 VirginiaNELAP Certification #: 460222 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 2 of 12 SAMPLE SUMMARY Project: Outfall 005 (NEW) 137-266 Pace Project No.: 92421169 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Lab ID Sample ID Matrix Date Collected Date Received 92421169001 0ut005-05-NEW E65 Water 03/13/19 11:05 03/13/19 15:34 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 3 of 12 SAMPLE ANALYTE COUNT Project: Outfall 005 (NEW) 137-266 Pace Project No.: 92421169 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Lab ID Sample ID Method Analytes Analysts Reported Laboratory 92421169001 Out005-05-NEW E65 EPA 300.0 Rev 2.1 1993 CDC 1 PASI-A EPA9012B CJH1 1 PASI-A REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 4 of 12 ANALYTICAL RESULTS Project: Outfall 005 (NEW) 137-266 Pace Project No.: 92421169 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-05-NEW E65 Lab ID: 92421169001 Collected: 03/13/19 11:05 Received: 03/13/19 15:34 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 4.2 mg/L 0.20 0.10 2 03/15/19 00:04 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide ND mg/L 0.0080 0.0040 1 03/16/19 13:00 03/17/19 14:34 57-12-5 M1,R1 REPORT OF LABORATORY ANALYSIS Date: 03/17/2019 05:27 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 5 of 12 QUALITY CONTROL DATA Project: Outfall 005 (NEW) 137-266 Pace Project No.: 92421169 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QC Batch: 463269 Analysis Method: EPA 300.0 Rev 2.1 1993 QC Batch Method: EPA 300.0 Rev 2.1 1993 Analysis Description: 300.0 IC Anions Associated Lab Samples: 92421169001 METHOD BLANK: 2520607 Matrix: Water Associated Lab Samples: 92421169001 Blank Reporting Parameter Units Result Limit MDL Analyzed Qualifiers Fluoride mg/L ND 0.10 0.050 03/14/19 15:48 LABORATORY CONTROL SAMPLE: 2520608 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Fluoride mg/L 2.5 2.5 99 90-110 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2520609 2520610 MS MSD 92421097007 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Fluoride mg/L ND 2.5 2.5 1.8 1.8 71 72 90-110 2 10 M1 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2520611 2520612 MS MSD 92421154004 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Fluoride mg/L ND 2.5 2.5 2.5 2.5 98 99 90-110 1 10 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS Date: 03/17/2019 05:27 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 6 of 12 QUALITY CONTROL DATA Project: Outfall 005 (NEW) 137-266 Pace Project No.: 92421169 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QC Batch: 463728 Analysis Method: EPA 9012B QC Batch Method: EPA 9012E Analysis Description: EPA 9012B Cyanide Associated Lab Samples: 92421169001 METHOD BLANK: 2522582 Matrix: Water Associated Lab Samples: 92421169001 Blank Reporting Parameter Units Result Limit MDL Analyzed Qualifiers Cyanide mg/L ND 0.0080 0.0040 03/17/19 14:32 LABORATORY CONTROL SAMPLE: 2522583 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Cyanide mg/L 0.1 0.11 105 80-120 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2522584 2522585 MS MSD 92421169001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Cyanide mg/L ND 0.1 0.1 0.061 0.091 58 87 75-125 39 20 M1,R1 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS Date: 03/17/2019 05:27 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 7 of 12 QUALIFIERS Project: Outfall 005 (NEW) 137-266 Pace Project No.: 92421169 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 DEFINITIONS DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot. ND - Not Detected at or above adjusted reporting limit. TNTC - Too Numerous To Count J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL - Adjusted Method Detection Limit. PQL - Practical Quantitation Limit. RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and bias for a specific analyte in a specific matrix. S - Surrogate 1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is a combined concentration. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD - Relative Percent Difference NC - Not Calculable. SG - Silica Gel - Clean -Up U - Indicates the compound was analyzed for, but not detected. Acid preservation may not be appropriate for 2 Chloroethylvinyl ether. A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA Method 8260. N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for each analyte is a combined concentration. Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes. TNI - The NELAC Institute. LABORATORIES PASI-A Pace Analytical Services - Asheville ANALYTE QUALIFIERS M1 R1 Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery. RPD value was outside control limits. REPORT OF LABORATORY ANALYSIS Date: 03/17/2019 05:27 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 8 of 12 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QUALITY CONTROL DATA CROSS REFERENCE TABLE Project: Outfall 005 (NEW) 137-266 Pace Project No.: 92421169 Lab ID Sample ID QC Batch Method Analytical QC Batch Analytical Method Batch 92421169001 0ut005-05-NEW E65 EPA 300.0 Rev 2.1 1993 463269 92421169001 0ut005-05-NEW E65 EPA 9012B 463728 EPA 9012B 463766 REPORT OF LABORATORY ANALYSIS Date: 03/17/2019 05:27 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 9 of 12 ///!,26vAnalytical Laboratory receiving samples: Asheville ❑ Eden❑ Courier: 0 Commercial i Client Name: ]Fed Ex PS 0Pace Document Name: Sample Condition Upon Receipt(SCUR) Document No.: P-CAR•CS-033-Rev,O6 Greenwood f] Huntersville ❑ Project Client Custody. Seal Present? Dyes SeafsIntact? °Yes ❑N Packing Material: ❑Bubble Wrap 09ubble Bags ❑IR Gun ID ./_,5 Type of ice; Cooler Temp {'C): 3 II Correction Factor: Add/Subtract CC) — (s 1 Cooler Temp Corrected ('G):. '31 3 Thermometer: None USDA Regulated Soil (❑ N/A, water sample) Dld samples originate in a quarantine zone within the United States: CA, NY, or SC (check maps)? []Yes ONo El Other ['Blue ❑None Document Revised: February 7, 2018 Page 1 of 2 Issuing Authority: Pace Carolinas Cluafity Office Raleigh f �° Mechanicsville❑ WD#:92421169 liu11II l l 11 l 1 UII11 92421169 Date/Initials Person Examining Contenh:,1-1 3-s.3Rt5 Blofogical Tissu�.e, F%°zen? [Yes ❑No 7/A Temp should be above freezing to 6'C ['Samples out of temp criteria. Samples on ice, cooling process haslfegu0 Dld samples originate From a foreign source (intsegationally, Inducting Hawaii and Puerto Rico)? ❑Yes No Chain of Custody Present? Samples Arrived within Hold Time? ONo ON/A ONo ❑N/A Comments/Discrepancy: Short Hold Time Analysis (<72 hr.)? Rush Turn Around Time Requested? Sufficient Volume? Correct Containers Used? -Pace Containers Used? Containers intact? Yes No [)N/A DES fliNo ❑N/A ❑Na ON/A Yes ONo ,CINIA fifes ONo ❑N/A ONo ON/A Dissolved analysis: Samples Field Filtered? Sample Labels Match COC? Yes ONo K/A Yes ONo ON/A -includes Date/Time/ID/Analysis Matrix: Headspace in VOA Vials (>5-6mm)? Trip Blank Present? Trip 'Blank Custody Seals Present? OYes EjNo A :Yes ❑No /A DYes OND [/)'N/A 10. RLPAIYCY rie CLIENT NOTIFICATION/RESOLUTION Lot 10 of split containers: Person contacted: Date/Time: Project Manager SCURF Review; Proiect Manager SRF Review: OM Date: Date: Page 10 of 12 Document Name: Sample Conditfon Upon Receipt(SCUR Document No.: F-CAR-CS-033-Rev_06 Document Revised: February 7, 2018 Pagelof2 lssuingAuthority: Pace Carolinas Qual' Ofn *Check mark top half of box If pH and/or dechlor€nation is verified and within the acceptance range for preservation samples. Exceptions: VOA, Coliform, TOC, Olt and Grease, DRD/805 (water} DOC, U.I{g "Bottom half of box is to list number of bottle Project W4# 92421169 1 12 E 0 • z 2 d U i v Fr Iv x y o Z. a a m p`. 2 0 0 u a uu T uu .L2 N d J. E J d J J E W t= o 0 0 8 N cr 3 v, 2 a a. 3- a m m m m Y 2 2 v E 0 m t? a DG9H-40 ml VOA HC1 (N/A) VG9T-40 mL VOA Na2S2O3 OVA) PM: AMB Due Date: 03/27/19 CLIENT: 92-Alcoa DGEP-40 all VOA H3PO4 (WA} z N te 0 7 0 7 Sample ID Type of Preservative p11 Adjustment Log for Preserved Samples pH upon receipt Date preservation adjusted Time preservation adjusted Amount of Preservative added Lot if Page 11 of 12 rm, -p o 72 On — 49 r•f. ' ",:, c,P,' /5 ).i';15 '1o& t•V'iti ite,t-, ''t'k''." 9::1. ''';''':!` al`.:'5 .2' 4 #'1 • ., 4, r, ! , ' `i,itl-V ,s("e,'' rill -41 ITE M # tequested Due Date: .5.—rie2 /Projec-I #: i Paco Proftie #: 7478-5 1".:aerari'..:ReiiiiestediAnalirais :ompany: Alcoa-Badin Works (Entrironeering) action A Section B 'equired Client Information: Required Project Information: . ....4 1:;:2••• . I • ' • • .. ''''i; it :43 OutO05-05-NEW E65 MATRIX CODE brInkIng Water OW Wnter WT Waste Water Product SAMPLE ID SoiVSolld Oil SL OL One Character per box. Wipe WP Mr Alt (A-2, 0-9 I • -) other OT Sample Ids must be unique Tome TS 1.4 IN ,1, -Qits.) ••D t t, c 1 q i ••.1 . ..... a Z-, ...,?,..• Purchase Order #: r4gt"" Project Name: Parfait 005 (NEW). Scope 2: Surface Waler. 1; 'Copy To:. Report To: Warden, Michael 1--....-----. , MATRIX CODE (see valid codes lo ioR) C's1 SAMPLE TYPE (0.GRAB C=COMP) L ....54 . _.> rri ISIGNATURE of SAMPLER h I DATE Signed: 5i/f -CP 72 ct 1 • , 4 • , ;-i , , ..g: 'il 1 I i M COLLECTED E A • a ci ''"••••-... ,...._.. r:, 1). m a I, .. _..., -4 [ SAMPLE TEMP AT COLLECTION . ':ti• '......^ ;Mi ''''..% # OPCONTAINERS Pace Quote: Pace Project Manager. angela.ttaioneacelabs.corn. 2 0.,.02. 4 T g) .--- Unpreserved Fill Preservatives -‹ • 0 ‘.r4 .,';'• /..V• H2504 .... a „..,.,.. HNO3 6 „ e g. ." ". HCI ir;ittr t. .. , . NaOH •,.., . , Ne28203 Melhanol As 12 ,irr Other ..\:g ggfi '''*,k,ria19,0:10ri.St..41,. qiIN:;: ',...1 :,...; it x Total Cyanide by 9312 •-. E‘' * x :::::1; • It VII, kz. ....1 ...t.. J . p., e i'.., , 14-N 1/4'....... f .1 ;,:•!,• :: 7 •-1 .,•••-':' 4-,) e• - • - ,r•I r' ,r4r 4eit --)', '-dt ' , •:. liSt .1% I _ , • :. '•: ••• '• , • Page : a Of TEMP In C 7,.... . ,.. : Re5'dual Chlorine (WM ',, • Received on Ice .-.‹.. 0 Cooler " Samples Intact ON „........4 3.'0 il ,... Page 12 of 12 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 March 17, 2019 Michael W. Worden Environeering, Inc. 16100 Cairnway Suite 320 Houston, TX 77084 RE: Project: Outfal 1005 137-266 Pace Project No.: 92421170 Dear Michael Worden: Enclosed are the analytical results for sample(s) received by the laboratory on March 13, 2019. The results relate only to the samples included in this report. Results reported herein conform to the most current, applicable TNI/NELAC standards and the laboratory's Quality Assurance Manual, where applicable, unless otherwise noted in the body of the report. If you have any questions concerning this report, please feel free to contact me. Sincerely, Ncylit Angela Baioni angela.baioni@pacelabs.com (704)875-9092 Project Manager Enclosures REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 1 of 19 CERTIFICATIONS Project: O u tfa 11005 137-266 Pace Project No.: 92421170 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Asheville Certification Ds 2225 Riverside Drive, Asheville, NC 28804 Florida/NELAP Certification #: E87648 Massachusetts Certification #: M-NC030 North Carolina Drinking Water Certification #: 37712 North Carolina Wastewater Certification #: 40 South Carolina Certification #: 99030001 VirginiaNELAP Certification #: 460222 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 2 of 19 SAMPLE SUMMARY Project: O u tfa 11005 137-266 Pace Project No.: 92421170 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Lab ID Sample ID Matrix Date Collected Date Received 92421170001 92421170002 92421170003 92421170004 92421170005 92421170006 92421170007 Out005-01-2.510 Out005-06-2.400 Out005-07-2.210 Out005-08-2.200 Out005-09-2.100 Out005-10-6.100 Out005-11.6.000 Water Water Water Water Water Water Water 03/13/19 11:30 03/13/19 11:55 03/13/19 12:10 03/13/19 12:20 03/13/19 12:35 03/13/19 13:05 03/13/19 13:20 03/13/19 15:34 03/13/19 15:34 03/13/19 15:34 03/13/19 15:34 03/13/19 15:34 03/13/19 15:34 03/13/19 15:34 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 3 of 19 SAMPLE ANALYTE COUNT Project: O u tfa 11005 137-266 Pace Project No.: 92421170 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Lab ID Sample ID Method Analytes Analysts Reported Laboratory 92421170001 0ut005-01-2.510 92421170002 0ut005-06-2.400 92421170003 0ut005-07-2.210 92421170004 0ut005-08-2.200 92421170005 0ut005-09-2.100 92421170006 0ut005-10-6.100 92421170007 0ut005-11.6.000 EPA 300.0 Rev 2.1 1993 CDC 1 PASI-A EPA9012B CJH1 1 PASI-A EPA 300.0 Rev 2.1 1993 CDC 1 PASI-A EPA9012B CJH1 1 PASI-A EPA 300.0 Rev 2.1 1993 CDC 1 PASI-A EPA9012B CJH1 1 PASI-A EPA 300.0 Rev 2.1 1993 CDC 1 PASI-A EPA9012B CJH1 1 PASI-A EPA 300.0 Rev 2.1 1993 CDC 1 PASI-A EPA9012B CJH1 1 PASI-A EPA 300.0 Rev 2.1 1993 CDC 1 PASI-A EPA9012B CJH1 1 PASI-A EPA 300.0 Rev 2.1 1993 CDC 1 PASI-A EPA9012B CJH1 1 PASI-A REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 4 of 19 ANALYTICAL RESULTS Project: O u tfa 11005 137-266 Pace Project No.: 92421170 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-01-2.510 Lab ID: 92421170001 Collected: 03/13/19 11:30 Received: 03/13/19 15:34 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 4.8 mg/L 0.20 0.10 2 03/15/19 00:20 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.13 mg/L 0.0080 0.0040 1 03/16/19 13:00 03/17/19 14:36 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 03/17/2019 05:27 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 5 of 19 ANALYTICAL RESULTS Project: O u tfa 11005 137-266 Pace Project No.: 92421170 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-06-2.400 Lab ID: 92421170002 Collected: 03/13/19 11:55 Received: 03/13/19 15:34 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 3.3 mg/L 0.10 0.050 1 03/14/19 23:00 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.16 mg/L 0.0080 0.0040 1 03/16/19 13:00 03/17/19 14:37 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 03/17/2019 05:27 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 6 of 19 ANALYTICAL RESULTS Project: O u tfa 11005 137-266 Pace Project No.: 92421170 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-07-2.210 Lab ID: 92421170003 Collected: 03/13/19 12:10 Received: 03/13/19 15:34 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 3.6 mg/L 0.10 0.050 1 03/14/19 23:16 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.14 mg/L 0.0080 0.0040 1 03/16/19 13:00 03/17/19 14:38 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 03/17/2019 05:27 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 7 of 19 ANALYTICAL RESULTS Project: O u tfa 11005 137-266 Pace Project No.: 92421170 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-08-2.200 Lab ID: 92421170004 Collected: 03/13/19 12:20 Received: 03/13/19 15:34 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 3.6 mg/L 0.10 0.050 1 03/14/19 23:32 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.14 mg/L 0.0080 0.0040 1 03/16/19 13:00 03/17/19 14:41 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 03/17/2019 05:27 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 8 of 19 ANALYTICAL RESULTS Project: O u tfa 11005 137-266 Pace Project No.: 92421170 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-09-2.100 Lab ID: 92421170005 Collected: 03/13/19 12:35 Received: 03/13/19 15:34 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 3.6 mg/L 0.10 0.050 1 03/14/19 23:48 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.13 mg/L 0.0080 0.0040 1 03/16/19 13:00 03/17/19 14:42 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 03/17/2019 05:27 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 9 of 19 ANALYTICAL RESULTS Project: O u tfa 11005 137-266 Pace Project No.: 92421170 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-10-6.100 Lab ID: 92421170006 Collected: 03/13/19 13:05 Received: 03/13/19 15:34 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 0.28 mg/L 0.10 0.050 1 03/15/19 14:31 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide ND mg/L 0.0080 0.0040 1 03/16/19 13:00 03/17/19 14:42 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 03/17/2019 05:27 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 10 of 19 ANALYTICAL RESULTS Project: O u tfa 11005 137-266 Pace Project No.: 92421170 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-11.6.000 Lab ID: 92421170007 Collected: 03/13/19 13:20 Received: 03/13/19 15:34 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 1.8 mg/L 0.10 0.050 1 03/15/19 14:46 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.049 mg/L 0.0080 0.0040 1 03/16/19 13:00 03/17/19 14:43 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 03/17/2019 05:27 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 11 of 19 QUALITY CONTROL DATA Project: O u tfa 11005 137-266 Pace Project No.: 92421170 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QC Batch: 463269 Analysis Method: EPA 300.0 Rev 2.1 1993 QC Batch Method: EPA 300.0 Rev 2.1 1993 Analysis Description: 300.0 IC Anions Associated Lab Samples: 92421170001, 92421170002, 92421170003, 92421170004, 92421170005 METHOD BLANK: 2520607 Matrix: Water Associated Lab Samples: 92421170001, 92421170002, 92421170003, 92421170004, 92421170005 Blank Reporting Parameter Units Result Limit MDL Analyzed Qualifiers Fluoride mg/L ND 0.10 0.050 03/14/19 15:48 LABORATORY CONTROL SAMPLE: 2520608 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Fluoride mg/L 2.5 2.5 99 90-110 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2520609 2520610 MS MSD 92421097007 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Fluoride mg/L ND 2.5 2.5 1.8 1.8 71 72 90-110 2 10 M1 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2520611 2520612 MS MSD 92421154004 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Fluoride mg/L ND 2.5 2.5 2.5 2.5 98 99 90-110 1 10 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS Date: 03/17/2019 05:27 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 12 of 19 QUALITY CONTROL DATA Project: O u tfa 11005 137-266 Pace Project No.: 92421170 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QC Batch: 463475 Analysis Method: EPA 300.0 Rev 2.1 1993 QC Batch Method: EPA 300.0 Rev 2.1 1993 Analysis Description: 300.0 IC Anions Associated Lab Samples: 92421170006, 92421170007 METHOD BLANK: 2521481 Matrix: Water Associated Lab Samples: 92421170006, 92421170007 Blank Reporting Parameter Units Result Limit MDL Analyzed Qualifiers Fluoride mg/L ND 0.10 0.050 03/15/19 11:31 LABORATORY CONTROL SAMPLE: 2521482 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Fluoride mg/L 2.5 2.6 102 90-110 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2521483 2521484 MS MSD 92421391001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Fluoride mg/L ND 2.5 2.5 3.1 3.1 122 122 90-110 0 10 M1 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2521485 2521486 MS MSD 92421283001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Fluoride mg/L 0.077J 2.5 2.5 2.5 2.5 97 98 90-110 1 10 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS Date: 03/17/2019 05:27 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 13 of 19 QUALITY CONTROL DATA Project: O u tfa 11005 137-266 Pace Project No.: 92421170 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QC Batch: 463728 Analysis Method: EPA 9012B QC Batch Method: EPA 9012E Analysis Description: EPA 9012B Cyanide Associated Lab Samples: 92421170001, 92421170002, 92421170003, 92421170004, 92421170005, 92421170006, 92421170007 METHOD BLANK: 2522582 Matrix: Water Associated Lab Samples: 92421170001, 92421170002, 92421170003, 92421170004, 92421170005, 92421170006, 92421170007 Blank Reporting Parameter Units Result Limit MDL Analyzed Qualifiers Cyanide mg/L ND 0.0080 0.0040 03/17/19 14:32 LABORATORY CONTROL SAMPLE: 2522583 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Cyanide mg/L 0.1 0.11 105 80-120 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2522584 2522585 MS MSD 92421169001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Cyanide mg/L ND 0.1 0.1 0.061 0.091 58 87 75-125 39 20 M1,R1 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS Date: 03/17/2019 05:27 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 14 of 19 QUALIFIERS Project: O u tfa 11005 137-266 Pace Project No.: 92421170 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 DEFINITIONS DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot. ND - Not Detected at or above adjusted reporting limit. TNTC - Too Numerous To Count J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL - Adjusted Method Detection Limit. PQL - Practical Quantitation Limit. RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and bias for a specific analyte in a specific matrix. S - Surrogate 1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is a combined concentration. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD - Relative Percent Difference NC - Not Calculable. SG - Silica Gel - Clean -Up U - Indicates the compound was analyzed for, but not detected. Acid preservation may not be appropriate for 2 Chloroethylvinyl ether. A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA Method 8260. N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for each analyte is a combined concentration. Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes. TNI - The NELAC Institute. LABORATORIES PASI-A Pace Analytical Services - Asheville ANALYTE QUALIFIERS M1 R1 Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery. RPD value was outside control limits. REPORT OF LABORATORY ANALYSIS Date: 03/17/2019 05:27 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 15 of 19 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QUALITY CONTROL DATA CROSS REFERENCE TABLE Project: O u tfa 11005 137-266 Pace Project No.: 92421170 Lab ID Sample ID QC Batch Method Analytical QC Batch Analytical Method Batch 92421170001 0ut005-01-2.510 EPA 300.0 Rev 2.1 1993 463269 92421170002 0ut005-06-2.400 EPA 300.0 Rev 2.1 1993 463269 92421170003 0ut005-07-2.210 EPA 300.0 Rev 2.1 1993 463269 92421170004 0ut005-08-2.200 EPA 300.0 Rev 2.1 1993 463269 92421170005 0ut005-09-2.100 EPA 300.0 Rev 2.1 1993 463269 92421170006 0ut005-10-6.100 EPA 300.0 Rev 2.1 1993 463475 92421170007 0ut005-11.6.000 EPA 300.0 Rev 2.1 1993 463475 92421170001 0ut005-01-2.510 EPA 9012B 463728 EPA 9012B 463766 92421170002 0ut005-06-2.400 EPA 9012B 463728 EPA 9012B 463766 92421170003 0ut005-07-2.210 EPA 9012B 463728 EPA 9012B 463766 92421170004 0ut005-08-2.200 EPA 9012B 463728 EPA 9012B 463766 92421170005 0ut005-09-2.100 EPA 9012B 463728 EPA 9012B 463766 92421170006 0ut005-10-6.100 EPA 9012B 463728 EPA 9012B 463766 92421170007 0ut005-11.6.000 EPA 9012B 463728 EPA 9012B 463766 REPORT OF LABORATORY ANALYSIS Date: 03/17/2019 05:27 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 16 of 19 i �r�G,p AAnn,�,11 x jr .J �VV,4al� i Document Name: Sample Condition Upon Receipt(SCUR) Document No,: FCAR•CS•033•Aev.O6 Document Revised: February 7, 2018 Page 1 of 2 issuing Authority: Pace Carolinas Quality Office Laboratory receiving samples: Asheville ❑ Eden❑ 54mple Condition Upon Receipt_ Courf er: 0 Commercial Custody. Seal Present? Client Name: Greenwood Ej 0Yes ❑No Seals Intact? ❑Yes Packing Material; ❑Bubble Wrap ❑Bubble Bags Thermometer; ❑1R Gun I0 Oe Cooler Temp CO: r ? Correction Factor: Add/Subtract CC) -- .1 Cooler Temp Corrected ('C)•�, 3 funtersvMlie Raleigh Mechanicsville❑ Proleci !lent ❑No Type of Ice: one ❑ Other ]Wet ❑81ue USDA Regulated Soil CO N/A, water sample) Did samples ar to in a quarantine zone within the United states: CA, NY, orSC (check maps)? Yes No [None WO#:92421170 MEHME111 92421170 Hate/lnitfa(sPerson Examining Contents: Biological Tissue rozen? Des ❑No N/A Temp sh oui(d be above freezing to b'C ❑samples out of temp criteria. Samples on ice, cooling process fras begun bid samples originate from a foreign source (Inter ationally, Including Hawaii and Puerto Rica)? Dies No Comm ents/Discrepancy: Chain of Custody Present? Samples Arrived within Hold Time? Short Hold Time Analysis (<72 hr.)? • fes Do ❑N/A gs ono ❑N/A Yes No ❑N/A Rush 'Turn Around Time Requested? ❑Yes Sufficient Volume? Correct Containers Used? -Pace Containers Used? Containers Intact? Dissolved analysis: Samples Field Fftered? Sample Labels Match COG? -Includes Date/Time/JD/Analysis Matrix:N., , l Headspace in VOA Vials i>5-6mm)? Trip Blank Present? Trip Blank Custody Sea Is Present? No ❑Nn ONo ❑No ❑No ❑No ❑No EN/A ❑N/A {lN/A ❑N/A ❑N/A 3, gNN/A +:' /A ❑Yes ❑No ❑Yas ❑No `22N/A ❑Yes No N/A 10. 11. rieI D 1 Seguired? Ores ❑No CLIENT NOTIFICATION/RESOLUTION Lot ID of split conta in ors: Person contacted; Date/Tim e: Project Manager SCURF Review: Prninrt Mm, In ui• bate: 12-1-167 Page 17 of 19 N f.11c?C1)Vaf1Cc Document Name: Sample Conditron Upon Recei . t SCUR) Document No.: F-CAR-CS-033-Rev.06 Document Revised: February 7, 2018 Page 1of2 Issuing Authority: Pace Carolinas Quar Office *Check mark top half of box If pH and/or dechlIorination 1s verified and within the acceptance range for preservation samples. Exceptions: VOA, Coliform, TOC, NI and Grease, DRO/8015 {water) DOC, Wig "Bottom half of box is to list number of bottle Project WO# 92421170 PM: AMB Due Date: 03/27/19 CLIENT: 92—Alcoa O v • U z�' ° Zzz z E m Z N ▪ 0 7 g • 2— d 2 2' W Z S S b N y N gW d a 0. N 4 n V m 0. d`i 0 O 4 O a 4 ca. n n d M. N i7 • S. C7 • O x _ u _u cr •{ a v u u u a u m 0.( d J J W. J n a E 4 E E. E a` • i E E E E g � o 1- K It , a 3 3 a • N z pi U S 7 a0. n a 0 n If a ,0- ▪ c ¢ d d al al m ,,a 0 co4l P3 S 4 0 co 0. E 4 J 0 t9 a pG9}1.40 mL VOA HCl (N/A) -Z.. a 0 J E a 0 cn } 4 z 4 0 E 0 DG9P-40 mL VOA H3PO4 tN/A) 4 z 0 1 4- a F m 0 F- men. cri N 1 BP3A-250 mL PS 0 1 13 N C 0 d E E 0 0 4 i 10 0 0000 k° 1 I 1 -\\ pH Adjustment Log for Preserved Samples Sample 1D Type of Preservative pH upon receipt Date preservation adjusted Time preservation adiustad Amount of Preservative added (mg Page 18 of 19 o--. ,eeF....-..qr rher.' is .-nrrrnnanr' ffartina Nnrrh Carolina rromntUnrw samnlas. a cam, of this Form will ha tent to the North Carolina IEHNR Certification alike (Le. C 0 0 u e o � — b , t,c., o 1 F5 .r 4 ,L ''I.) •4.as..:5 : R S .N ma: i.yyi' ' �t ray: r;=%.. 0 Y } �- 4 ..;� z i•,' ilA r( " (%sa' (N/A) 0 O Cd > 37 �" 4 pekes Apoisna pa' - enI ua penleaoJ N U{ dV131 'Sk ,Ya No.) gUPclu0lmpISB21 SIGNATURE of SAMPLER: DATE Signed: ,)/ 5/ J q PRINT Name of SAMPLER: itt I A 1 Fll a .... q R U d a 0 O' a Pace Project Manager: anoda.inaiani(a?pacelahs.coT,, kZti is 0'00£ AO epponld Ie101 x x X x X X X tiF¢ ' {' L406 hq ep{ue,S3 IQIo1 x X X X x X X �]yi • Jay1D {oue4leVd a EOZSZeN ca HORN �— tiCJ IaH p0 ❑ eoNH ''S d bOSZH � .� �1�f c penresaJduf — — --- -- — 1 _ a St1BHIV1N00 d0 (� F.OIi031103LYeFtI3L31dV ' ��-� IRcpNRTo: Warden. Michael Cnpy To: I 'Purchase Order*: 1 co G 0 E 49 zr, U N O '€0 al zLLI III .177, Qn w U y. 'ta I . `-- (d Vi00.0 fl,d80.9) 3dA13ldl'IVS C...3 �9 " .. U F:• �. 5 t 5 r S S 5 5 5 a- "V ilia{ of capon Rim essl 3000 XIkILVW U v O VATRIX CODE Drinking WienWienr DW wacr wr W.-re Wallis WW Prod.: P SAMPLE ID Sod/Solid SL Oil OL One Character per boy_ wipc WP (A-Z,0-9l,-) Air AR OCxr OT Sample Ids must be unique nxsue rS k=t G 0 CND� g O Q hj 0 5 Q N N 5 O Pi R 5 O Q 0 S O O 5 O o g 5 O JUG# il v W c o ca 3 a cp a o `N' ..•c ❑ o _ E aTA' o d # Wail '{ w ,, lit °� ; '1 }>? 5... V s..:. } I ?fi d;,s. ',i,',u- Sj .c3 t ! I , ., "a Y'1 y- d : �, : ry �CrerN, `3Y' �M1it ,7. , Page 1 of 19 Draft — Hydrogeological Conceptual Site Model Update — Badin Business Park 2019-03-27 EHS Support LLC Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 April 02, 2019 Michael W. Worden Environeering, Inc. 16100 Cairnway Suite 320 Houston, TX 77084 RE: Project: 137-266 Outfal 1005 Pace Project No.: 92423083 Dear Michael Worden: Enclosed are the analytical results for sample(s) received by the laboratory on March 28, 2019. The results relate only to the samples included in this report. Results reported herein conform to the most current, applicable TNI/NELAC standards and the laboratory's Quality Assurance Manual, where applicable, unless otherwise noted in the body of the report. If you have any questions concerning this report, please feel free to contact me. Sincerely, Ncylit Angela Baioni angela.baioni@pacelabs.com (704)875-9092 Project Manager Enclosures REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 1 of 18 CERTIFICATIONS Project: 137-266 Outfall 005 Pace Project No.: 92423083 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Asheville Certification Ds 2225 Riverside Drive, Asheville, NC 28804 Florida/NELAP Certification #: E87648 Massachusetts Certification #: M-NC030 North Carolina Drinking Water Certification #: 37712 North Carolina Wastewater Certification #: 40 South Carolina Certification #: 99030001 VirginiaNELAP Certification #: 460222 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 2 of 18 SAMPLE SUMMARY Project: 137-266 Outfall 005 Pace Project No.: 92423083 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Lab ID Sample ID Matrix Date Collected Date Received 92423083001 0ut005-01-2.510 Water 03/27/19 12:45 03/28/19 09:09 92423083002 0ut005-06-2.400 Water 03/27/19 13:20 03/28/19 09:09 92423083003 0ut005-07-2.210 Water 03/27/19 13:30 03/28/19 09:09 92423083004 0ut005-08-2.200 Water 03/27/19 13:40 03/28/19 09:09 92423083005 0ut005-09-2.100 Water 03/27/19 13:50 03/28/19 09:09 92423083006 0ut005-10-6.100 Water 03/27/19 14:05 03/28/19 09:09 92423083007 0ut005-11-6.000 Water 03/27/19 14:20 03/28/19 09:09 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 3 of 18 SAMPLE ANALYTE COUNT Project: 137-266 Outfall 005 Pace Project No.: 92423083 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Lab ID Sample ID Method Analytes Analysts Reported Laboratory 92423083001 0ut005-01-2.510 92423083002 0ut005-06-2.400 92423083003 0ut005-07-2.210 92423083004 0ut005-08-2.200 92423083005 0ut005-09-2.100 92423083006 0ut005-10-6.100 92423083007 0ut005-11-6.000 EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA 9012E NAL 1 PASI-A EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA 9012E NAL 1 PASI-A EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA 9012E NAL 1 PASI-A EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA 9012E NAL 1 PASI-A EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA 9012E NAL 1 PASI-A EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA 9012E NAL 1 PASI-A EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA 9012E NAL 1 PASI-A REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 4 of 18 ANALYTICAL RESULTS Project: 137-266 Outfall 005 Pace Project No.: 92423083 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-01-2.510 Lab ID: 92423083001 Collected: 03/27/19 12:45 Received: 03/28/19 09:09 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 6.2 mg/L 0.30 0.15 3 03/31/19 02:10 16984-48-8 M1 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.44 mg/L 0.040 0.020 5 03/31/19 15:43 04/01/19 11:56 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 04/02/2019 10:22 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 5 of 18 ANALYTICAL RESULTS Project: 137-266 Outfall 005 Pace Project No.: 92423083 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-06-2.400 Lab ID: 92423083002 Collected: 03/27/19 13:20 Received: 03/28/19 09:09 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 3.6 mg/L 0.10 0.050 1 03/30/19 10:25 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.19 mg/L 0.0080 0.0040 1 03/31/19 15:43 04/01/19 11:47 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 04/02/2019 10:22 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 6 of 18 ANALYTICAL RESULTS Project: 137-266 Outfall 005 Pace Project No.: 92423083 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-07-2.210 Lab ID: 92423083003 Collected: 03/27/19 13:30 Received: 03/28/19 09:09 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 3.9 mg/L 0.10 0.050 1 03/30/19 10:40 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.15 mg/L 0.0080 0.0040 1 03/31/19 15:43 04/01/19 11:48 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 04/02/2019 10:22 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 7 of 18 ANALYTICAL RESULTS Project: 137-266 Outfall 005 Pace Project No.: 92423083 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-08-2.200 Lab ID: 92423083004 Collected: 03/27/19 13:40 Received: 03/28/19 09:09 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 3.7 mg/L 0.10 0.050 1 03/30/19 10:55 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.16 mg/L 0.0080 0.0040 1 03/31/19 15:43 04/01/19 11:49 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 04/02/2019 10:22 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 8 of 18 ANALYTICAL RESULTS Project: 137-266 Outfall 005 Pace Project No.: 92423083 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-09-2.100 Lab ID: 92423083005 Collected: 03/27/19 13:50 Received: 03/28/19 09:09 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 3.8 mg/L 0.10 0.050 1 03/30/19 11:10 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.15 mg/L 0.0080 0.0040 1 03/31/19 15:43 04/01/19 11:49 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 04/02/2019 10:22 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 9 of 18 ANALYTICAL RESULTS Project: 137-266 Outfall 005 Pace Project No.: 92423083 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-10-6.100 Lab ID: 92423083006 Collected: 03/27/19 14:05 Received: 03/28/19 09:09 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 0.22 mg/L 0.10 0.050 1 03/30/19 12:10 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide ND mg/L 0.0080 0.0040 1 03/31/19 15:43 04/01/19 11:50 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 04/02/2019 10:22 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 10 of 18 ANALYTICAL RESULTS Project: 137-266 Outfall 005 Pace Project No.: 92423083 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-11-6.000 Lab ID: 92423083007 Collected: 03/27/19 14:20 Received: 03/28/19 09:09 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 2.1 mg/L 0.10 0.050 1 03/30/19 12:25 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.077 mg/L 0.0080 0.0040 1 03/31/19 15:43 04/01/19 11:53 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 04/02/2019 10:22 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 11 of 18 QUALITY CONTROL DATA Project: 137-266 Outfall 005 Pace Project No.: 92423083 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QC Batch: 466419 Analysis Method: EPA 300.0 Rev 2.1 1993 QC Batch Method: EPA 300.0 Rev 2.1 1993 Analysis Description: 300.0 IC Anions Associated Lab Samples: 92423083001, 92423083002, 92423083003, 92423083004, 92423083005, 92423083006, 92423083007 METHOD BLANK: 2535267 Matrix: Water Associated Lab Samples: 92423083001, 92423083002, 92423083003, 92423083004, 92423083005, 92423083006, 92423083007 Blank Reporting Parameter Units Result Limit MDL Analyzed Qualifiers Fluoride mg/L ND 0.10 0.050 03/30/19 09:10 LABORATORY CONTROL SAMPLE: 2535268 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Fluoride mg/L 2.5 2.3 94 90-110 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2535269 2535270 MS MSD 92423083001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Fluoride mg/L 6.2 2.5 2.5 7.8 7.8 64 63 90-110 0 10 M1 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2535271 2535272 MS MSD 92423313001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Fluoride mg/L ND 2.5 2.5 3.9 3.9 157 154 90-110 2 10 M1 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS Date: 04/02/2019 10:22 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 12 of 18 QUALITY CONTROL DATA Project: 137-266 Outfall 005 Pace Project No.: 92423083 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QC Batch: 466486 Analysis Method: EPA 9012B QC Batch Method: EPA 9012E Analysis Description: EPA 9012B Cyanide Associated Lab Samples: 92423083001, 92423083002, 92423083003, 92423083004, 92423083005, 92423083006, 92423083007 METHOD BLANK: 2535563 Matrix: Water Associated Lab Samples: 92423083001, 92423083002, 92423083003, 92423083004, 92423083005, 92423083006, 92423083007 Blank Reporting Parameter Units Result Limit MDL Analyzed Qualifiers Cyanide mg/L ND 0.0080 0.0040 04/01/19 11:42 LABORATORY CONTROL SAMPLE: 2535564 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Cyanide mg/L 0.1 0.10 102 80-120 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2535565 2535566 MS MSD 92423083001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Cyanide mg/L 0.44 0.1 0.1 0.53 0.53 96 89 75-125 1 20 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS Date: 04/02/2019 10:22 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 13 of 18 QUALIFIERS Project: 137-266 Outfall 005 Pace Project No.: 92423083 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 DEFINITIONS DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot. ND - Not Detected at or above adjusted reporting limit. TNTC - Too Numerous To Count J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL - Adjusted Method Detection Limit. PQL - Practical Quantitation Limit. RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and bias for a specific analyte in a specific matrix. S - Surrogate 1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is a combined concentration. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD - Relative Percent Difference NC - Not Calculable. SG - Silica Gel - Clean -Up U - Indicates the compound was analyzed for, but not detected. Acid preservation may not be appropriate for 2 Chloroethylvinyl ether. A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA Method 8260. N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for each analyte is a combined concentration. Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes. TNI - The NELAC Institute. LABORATORIES PASI-A Pace Analytical Services - Asheville ANALYTE QUALIFIERS M1 Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery. REPORT OF LABORATORY ANALYSIS Date: 04/02/2019 10:22 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 14 of 18 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QUALITY CONTROL DATA CROSS REFERENCE TABLE Project: 137-266 Outfall 005 Pace Project No.: 92423083 Lab ID Sample ID QC Batch Method Analytical QC Batch Analytical Method Batch 92423083001 0ut005-01-2.510 EPA 300.0 Rev 2.1 1993 466419 92423083002 0ut005-06-2.400 EPA 300.0 Rev 2.1 1993 466419 92423083003 0ut005-07-2.210 EPA 300.0 Rev 2.1 1993 466419 92423083004 0ut005-08-2.200 EPA 300.0 Rev 2.1 1993 466419 92423083005 0ut005-09-2.100 EPA 300.0 Rev 2.1 1993 466419 92423083006 0ut005-10-6.100 EPA 300.0 Rev 2.1 1993 466419 92423083007 0ut005-11-6.000 EPA 300.0 Rev 2.1 1993 466419 92423083001 0ut005-01-2.510 EPA 9012B 466486 EPA 9012B 466574 92423083002 0ut005-06-2.400 EPA 9012B 466486 EPA 9012B 466574 92423083003 0ut005-07-2.210 EPA 9012B 466486 EPA 9012B 466574 92423083004 0ut005-08-2.200 EPA 9012B 466486 EPA 9012B 466574 92423083005 0ut005-09-2.100 EPA 9012B 466486 EPA 9012B 466574 92423083006 0ut005-10-6.100 EPA 9012B 466486 EPA 9012B 466574 92423083007 0ut005-11-6.000 EPA 9012B 466486 EPA 9012B 466574 REPORT OF LABORATORY ANALYSIS Date: 04/02/2019 10:22 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 15 of 18 Laboratory receiving samples: Asheville ❑ Eden❑ Sample (onciitinn.. Upon Receipt Courier. 0 Commercial Document Name: Sample Condition Upon Receipt(SCUR) Document No.; F-CAR-CS-033-Rev.06 Document Revised: February 7, 2013 Page 1 of 2 Issuing Authority: Face Carolinas quality Office Greenwood 0 Huntersville❑ Raleigh Mechanicsvil)e❑ dio.otoniedg.ic oa adin _ . 1)(4 , WO# 6. 92423083 Project it [Client I 1011111111111111111 83 92423© DFed Ex CUPS []Pate, ❑US PS °Other:,,,T Cusfody, Seal Present? De VNo Packing Material: ❑Bubble Wrap Thermometer: Goo ID: i1 Too, ❑1Rf Cooler Temp [°C):.S S. g- Correction Factor: Add/Subtract ('C) Cooler Temp Corrected {'C)• $ ' Seals Intact? QYes ❑No ❑Bubble Bags None O' Other Type of' Wet DBiue d,1 USDA Regulated Soil (❑ N/A, watersempre) Did samples ort inate in a quarantine zone within the United Slates: CA, NY, or Sc (check maps)? ■ Yes No ((( Date/initials Person Examining Contents: V 6 1 DNone Biological Tissue Frozen? []Yes ❑No f2N/A Temp should be above freezing to 6°C QSarnples out of temp crfterla, Samples on Ice, cooling process has begun Did samples originate from a Foreign source (Inte tonally, Including Hawaii and Puerto Aka)? ❑Yes No Comments/Discrepancy; Chain of Custody Present? g es Dtro DN/A 5arnpies Arrived within Hold Time? . /DNo DNA 2. Short Hold Time Analysis (<72 hr.)? • DYes irNo DNA 3. Rush [] TumAroundTime Requested? Yes 1[(/7No ON/A 4. Sufficient Volume? Correct Containers Used? -Pace Containers Used? Containers Intact? Dissolved analysis: Samples Field Filtered? tplYes ❑No DN/A !-'.es t' ElNn .DN/A DNo ❑N/A 2Yes DNo DN/A Dyes DNa /A j S. Sample Labels Match COC? ©Yes ❑No ❑N/A -Includes Date/Time/ID/Analysis Matrix;` Headspace in VOA Vials (>5-6mm)? Trip Blank Present? Trip Blank Custody Seals Present? Dyes ❑No N/A 10. Yes DNo /A 17.. ass ONO V&A /SAAiPLC a15CftCPANCY r +a uata xegwredr Des GINo Lot ID of spit containers: CLIENT NOTIFICATION/RESOLI}TION Person contacted: Date/Time: Project Manager SCURF Review; Project Manager 5RF Review; ilfflfb 1g1cl 6 Date: !late: Page 16 of 18 i itCl'1o4Itfif A Document Name: Sample Condition Upon Receipt(SCUR) Document No.: F-CAR-CS-033-Rev.06 *Check mark top half of box if pH and/or dechlorination is verified and within the acceptance range for preservation samples. Exceptions: VOA, Conform, TOC, oil and Grease, ORO/BOiS (water) DOC, Li.Hg **Bottom half of box is to list number of bottle Document Revised: February 7, 2018 Pagel of 2 Issuing Authority: Pace Carolinas Quality Office Projects WO# 92423083 PM: AMB Due Date: 04/02/19 CLIENT: 92—Alcoa V z 9?] 1 u ..'6 7 u a J E 6 w 359 u m i i — Z N N V m @ Z `� m .' c g 7 7 ' u u g y" a n. ad J .J 0. E E ruf ri 3 3 co m m O ry V v O r „ Y a E of m 9 2 M os V a ro m u O sC 2 _u Yn o. a -1 E E rvf i N m m rygN ra h a x 0 n z a J E i cO m V 2 C :� ro 2 0, y E v 3 u7. V > f . Z N u 2 a. C .a ¢ ; 3 ¢ N v x U L. it E ° ,- a u ' 'v u a C.. u E < o 3 ¢ rV V V O N .c w � a _ N v a o N 2 `m E ‹ `^ tit m a z 0 z E E 4 E a q m g a 4 2 z ¢ o E• q S rn o 4 Z m Pt in Z ¢ a pEp Y l- 4 2 Q a d o E a n F.,(,- Z a Q `�_ > E q o. a o \..\\., y 2 \ it,L- . 4 0„ \\ \\, S I ,..... , Ok \ 1 10k \ \ g IN 9111011 lijklik& \ ......._ --- ta,—... ..., ....,.,--.w i e �_ _ mo— -- pH Adjustment Log for Preserved Samples Sample. ID Type of Preservative pH upon receipt bate presentation adfusted The preservation adfusted Amount of Preservative added Lot it l Note: Wheneve there is a discrepancy affecting North Carolina compliance vamp es, a copy of this Out of hold, incorrect preservative, out od temp. Ineerr act containers. Page 17 of 18 7J -0 mca4miu-1 I 1441§1,,,4 71c- paci Email: ILI iji..114., ComPooY: Pk.s-Sedin Works (Envimneerirra) Address: 138 rui ..hitawuri DOa5 itsca. CA-1,2,4o424 1'4. •" ' i71.v:.7iL r1, •;• C. --, • L.-. `',L= ..2.,.6k , 'i-lie11 1-''''. .5.,,I.,,,..,,,.:. f4.-L!,' m "- ITEm # i 1 -* p,„...,,,j.. .,4-1,-.4fE lich'i .:S ': rr, ' ,i- • ire 'kr) ° b 8 ° g., -. 8 ° . A; 8, 0 E 2 N 6 2 ._.. i4 12 2 .._. 1. 0 .t• L.: MATRIX CODE Drhtling Water OW weter WT Waste Weder Product SAMPLE ID 54i/Sad 5L Ono Character per box. vAP• WP AirAI 1A-2, 0-9 I .-) sarnOe 1455 MUST be ...Igoe T. .2.0,.. 0 s A-Y F 4.-- rl ....1 Report To: Worcien. Michael Copy To: 0 .,... MATRIX CODE (see valid codes to leii.) 4* . q.., CsN Z'N CL% V". 6—e.51. SAMPLETYPE (a -GRAB C=COMP) _i. c) --, o PRINT Name of SAMPLER: fl Cjidtpry...) T.M;; aii, \ \ 1 C r........ —I COLLECTED § i)°•.'' 4C.. :74!" V.,.. 0 ...; C. ' .—......—.. .....,, -3? , rn rn Ith 'rch: it .kt 5.5'i ‘....... X. e '....... ..0 F-N 1......, 1" ........ ...........0. •,,- Cr'''''4 77,...:„. r.4.6\ .... rrl 0 SAMPLE7EMR AT OOLLECTM :4- .- (-1 ( 1--) r-3 ra iNi # OF CONTAINERS Cth '), hmh+. h-... h. ..... -... -• •••••••• Unproterved Preservatives 7 3 izi •ii. 2 0 . 1 .7,si h ''hikr :k ''' H2804 w a 5 E ''ed.,Zhh HNO3 R h:h""e'•:'. '7•4:: IA NCI in 5, g g ;441 NI einem! Mar g- 'Lvli 't TN .., •-.'..; 412- ........ (filA,,,P—!ilY--0-0•3.:2-eie''''F'': Y.,,f6t.',.... ....., )( X x X X X 9012 OVA Cyanide) ...: 13 X X X X X X X 300 DiTela1 Fluoride) iv . ' • * • . 1.;'..:.'l tgt-:: ,.,a, \A !,•...C‘ ,,,,17,!"'.. -14 4, ....,... ."Cl 0 ;-:' ...-C: ;s: r,•:. Sj P: TEMP In O to. lie. y ',./. R eskluel Chlorine MN) a Received n i Gil raw .......c ,i-Erl•-,." ?Jtg -.., .i. k ,-...(--, , 2 GL.L5tp,-.ty Sealed Cooler (Y.IN) ..._ < Y.8, ,:z4 ' •N 46 ,'-i.i: & \ j (i C' J \ 3' 0 C'' ,_, i k\-) C ' 6‘jc) , . Berlekta Intact (YiN) ......e.. ,1\ .. ... j j s,.., ___ . N.L../`.1 • .L.' IQ F g, a 2 7 g g 1 0 9 g o 2 b ,„ 2- C 0 a) —I m § > C 8 6- X g sl c . U) !I/ 0 cr c 8 a 3 0. Page 18 of 18 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 April 02, 2019 Michael W. Worden Environeering, Inc. 16100 Cairnway Suite 320 Houston, TX 77084 RE: Project: 137-266 Outfall 005 (New) Pace Project No.: 92423087 Dear Michael Worden: Enclosed are the analytical results for sample(s) received by the laboratory on March 28, 2019. The results relate only to the samples included in this report. Results reported herein conform to the most current, applicable TNI/NELAC standards and the laboratory's Quality Assurance Manual, where applicable, unless otherwise noted in the body of the report. If you have any questions concerning this report, please feel free to contact me. Sincerely, Ncylit Angela Baioni angela.baioni@pacelabs.com (704)875-9092 Project Manager Enclosures REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 1 of 12 CERTIFICATIONS Project: 137-266 Outfall 005 (New) Pace Project No.: 92423087 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Asheville Certification Ds 2225 Riverside Drive, Asheville, NC 28804 Florida/NELAP Certification #: E87648 Massachusetts Certification #: M-NC030 North Carolina Drinking Water Certification #: 37712 North Carolina Wastewater Certification #: 40 South Carolina Certification #: 99030001 VirginiaNELAP Certification #: 460222 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 2 of 12 SAMPLE SUMMARY Project: 137-266 Outfall 005 (New) Pace Project No.: 92423087 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Lab ID Sample ID Matrix Date Collected Date Received 92423087001 0ut005-05-NEW E65 Water 03/27/19 13:05 03/28/19 09:09 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 3 of 12 SAMPLE ANALYTE COUNT Project: 137-266 Outfall 005 (New) Pace Project No.: 92423087 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Lab ID Sample ID Method Analytes Analysts Reported Laboratory 92423087001 Out005-05-NEW E65 EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA 9012E NAL 1 PASI-A REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 4 of 12 ANALYTICAL RESULTS Project: 137-266 Outfall 005 (New) Pace Project No.: 92423087 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-05-NEW E65 Lab ID: 92423087001 Collected: 03/27/19 13:05 Received: 03/28/19 09:09 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 4.0 mg/L 0.10 0.050 1 03/30/19 12:55 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide ND mg/L 0.0080 0.0040 1 03/31/19 15:43 04/01/19 11:55 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 04/02/2019 10:22 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 5 of 12 QUALITY CONTROL DATA Project: 137-266 Outfall 005 (New) Pace Project No.: 92423087 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QC Batch: 466419 Analysis Method: EPA 300.0 Rev 2.1 1993 QC Batch Method: EPA 300.0 Rev 2.1 1993 Analysis Description: 300.0 IC Anions Associated Lab Samples: 92423087001 METHOD BLANK: 2535267 Matrix: Water Associated Lab Samples: 92423087001 Blank Reporting Parameter Units Result Limit MDL Analyzed Qualifiers Fluoride mg/L ND 0.10 0.050 03/30/19 09:10 LABORATORY CONTROL SAMPLE: 2535268 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Fluoride mg/L 2.5 2.3 94 90-110 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2535269 2535270 MS MSD 92423083001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Fluoride mg/L 6.2 2.5 2.5 7.8 7.8 64 63 90-110 0 10 M1 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2535271 2535272 MS MSD 92423313001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Fluoride mg/L ND 2.5 2.5 3.9 3.9 157 154 90-110 2 10 M1 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS Date: 04/02/2019 10:22 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 6 of 12 QUALITY CONTROL DATA Project: 137-266 Outfall 005 (New) Pace Project No.: 92423087 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QC Batch: 466486 Analysis Method: EPA 9012B QC Batch Method: EPA 9012E Analysis Description: EPA 9012B Cyanide Associated Lab Samples: 92423087001 METHOD BLANK: 2535563 Matrix: Water Associated Lab Samples: 92423087001 Blank Reporting Parameter Units Result Limit MDL Analyzed Qualifiers Cyanide mg/L ND 0.0080 0.0040 04/01/19 11:42 LABORATORY CONTROL SAMPLE: 2535564 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Cyanide mg/L 0.1 0.10 102 80-120 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2535565 2535566 MS MSD 92423083001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Cyanide mg/L 0.44 0.1 0.1 0.53 0.53 96 89 75-125 1 20 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS Date: 04/02/2019 10:22 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 7 of 12 QUALIFIERS Project: 137-266 Outfall 005 (New) Pace Project No.: 92423087 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 DEFINITIONS DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot. ND - Not Detected at or above adjusted reporting limit. TNTC - Too Numerous To Count J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL - Adjusted Method Detection Limit. PQL - Practical Quantitation Limit. RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and bias for a specific analyte in a specific matrix. S - Surrogate 1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is a combined concentration. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD - Relative Percent Difference NC - Not Calculable. SG - Silica Gel - Clean -Up U - Indicates the compound was analyzed for, but not detected. Acid preservation may not be appropriate for 2 Chloroethylvinyl ether. A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA Method 8260. N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for each analyte is a combined concentration. Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes. TNI - The NELAC Institute. LABORATORIES PASI-A Pace Analytical Services - Asheville ANALYTE QUALIFIERS M1 Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery. REPORT OF LABORATORY ANALYSIS Date: 04/02/2019 10:22 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 8 of 12 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QUALITY CONTROL DATA CROSS REFERENCE TABLE Project: 137-266 Outfall 005 (New) Pace Project No.: 92423087 Lab ID Sample ID QC Batch Method Analytical QC Batch Analytical Method Batch 92423087001 0ut005-05-NEW E65 EPA 300.0 Rev 2.1 1993 466419 92423087001 0ut005-05-NEW E65 EPA 9012B 466486 EPA 9012B 466574 REPORT OF LABORATORY ANALYSIS Date: 04/02/2019 10:22 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 9 of 12 1 /HceAi ca/ Document Name: Sam le Condition Upon Recelpt(SCURJ Document No.: F-CAR-CS-033-Rev.06 Document Revised: February 7, 2018 Pagel of2 • issuing Authority: Pace Carolinas Quality Office Laboratory receiving samples: Asheville ❑ Eden❑ Courier: 0 Commercial art UM; ; Greenwood ❑ Huntersviiie ❑ Raleigh[7] Mechanicsville❑ rks...... Project #: ❑Fed Ex ['UPS ❑USPS [Pace ❑other:_ ❑Client Custody Seal Present? ['Yes • Packing Material: ❑Bubble Wrap IR Gun ID Dof (Too s' JR Thermometer Seals Intact? ❑Yes ❑Na WOft:92423067 II I III III I II I II IIII III pate/Inirais Person Examining Contents: VL• ItA ['Bubble Bags 4Nane ❑' Other Type of Ice: ['Wet ❑Blue ❑None Cooler Temp (4C): Comedian Factor, Add/Subtract ('C) 0 ` Cooler Temp Corrected NJ:, 1/4/' 7 USDA Regulated Soil (0 N/A, water sampie) Dld sarnpies origi .te Ina quarantine zone within the United States: CA, NY, or SC (check maps)? Yes 1 o Biological Tisst�e rozen? ❑Yes ❑No N/A Temp should he above freezing to 6°C QSamples out of temp criteria. Samples an ice, coating process has begun Did samples originate from a roreIgn source (in tionally, including Hawaii arc! Puerto Rico)? j]Yes o Comments/Discrepancy: ((( Chain of Custody Present? Samples Arrived within Hold Time? VYes ❑No ON/A No ©N/A Short Hold Time Analysis (<72 hr.)7 - ©Y No ❑N/A 3. Rush Turn Around Time Requested? Sufficient Volume? Correct Containers Used? -Pace Containers Used? Containers Intact? Dissolved analysis: Samples Field Filtered? Sample labels Match CDC? ❑Yes No ON/A Yes ❑Na DN/A Yes ❑Yes 'Yrs -Includes Date/Tlme/iD/Analysis Matrix Headspace in VOAViais (>5-5mm)? Trip Blank Present? Trip blank Custody Seals Present? DYes ❑Yes ❑Yes DNo •❑N/A ❑N❑ ❑N/A ONO ❑N/A ❑No N/A ❑No N/A Oslo m /A ❑No !/A ❑No /N/A 5. 8. 10. 11. Fie Lot ID of split containers: CLIENT NOTIFICATION/RESOLUTION Person contacted: Project Manager SCURF Review: Project IVEsnager SRF Review: Datefilme: Date: Date: - a� 1c1 Page 10 of 12 i /Ir2P,A1 ytfair Dacumerrt Name: Sample Condition Upon Recetpt(5CUR) Document No.: F-CAR-CS-033-Rev.05 *Check mark top half of box If pH and/or dechlorinatfon is Protect # verified and within the acceptance range for preservation samples. Exceptions: VOA, Coliform, 7OC Oil and Grease, ORO/6015 (water) DOC, LLHg **Bottom half of box is to list number of bottle Document Revised: February 7, 2018 Page l of 2 Issuing Authority: Pace Carolinas Quality Office WV#:92423087 PM: AMB Due Date: 04/02/19 CLIENT: 92—Alcoa L 1 2 3 4 5 \ b \ 7 4 Sample ID Z a a. CEP N \\N Type of Preservative N er Unpreserved (N/A) {CI-) AG115-1 liter AG1H-1 liter Amber HCI (pri a 2) AG3U-2s0 mL Amber Unpreserved (N/A) (CI-} DG4H-40 mL VOA FiC( (N/A) z G 0 E t4 DG9P-40 mL VOA H3PD4 (N/A) pH Adjustment Log for Preserved Samples pH upon receipt \\\, Date preservation adf usted The praservatlon adjusted VOA( (6 vials per ktt}-5035 kit (N/A) t7 a M to SP57.I25 mt. Sterile Plastic (N/A — lab) SPIT--250 mL Sterile Plastic (N/A — Sab) BP3A-250 mLPIastic MI-12)25O4 t3.3-9.7) AG3U100 mLAmber Uppreserved vials (N/A) VS13U-20 mLSdntll3atlan vials {N/A) DGSU-a0 mLAmber LInpreservcd vials {N/A) \\ Amount of Preservative added Loaf Note: Whenever there is a discrepancy affecting North Carolina compliance samples, a copy of this form writ be sent to the North Caroline DEHNR Cortiflcatfon Orrice (Le. Out of Acid, Incorrect preservative, nut of temp, incorrect containers. Page 11 of 12 r} � , ,Y 'k � ��V fi.15w51 lu l}'Y , ITEM .A F 11i. g• 8r 4 n .s: C Z immix cow Many Wahl CW Water WT wtedrwner w.v Promrd SAMPLE ID 60i "a Oil a One Character per box. Wipe WP (A-Z. 11-9 f r) 1 nR cnn. oc Sample Ids mull be unique T. >•s ♦ 74 T. t t , R Purchase Order 4C: Project Name: _ 137-266 Outfer! C05 (hit O q 1Report To: Women, Michact sx -. MATRIX CODE (see valid codas to left) f III ■�■�.■■ (% SAMPLETYPE (6=ORA9 C.COMP) og ISIGNATURE of SAMPLER: e 1 DATE Signed: e3 PRINT Nome of SAMPLER- -M , tIUIHllh11I COLLECTED m z • �� .=Sr IIIIliIRUnPressrved m (s,,, CTI SAMPLE TEMP AT GOLiEON -- p• n #OF CONTAINERS S J, > Mom■ 2 0 q a z 4IIUII1IUUIU4 , :: ;. . MN NI © NeOH (1)VI , tir� .■..■.■.■. III ■ � MBlhnnol aver g. Maiyses T6st -g? WN�4 e: ,� 9012 (Total Cyanide) i g ' ' J 300,0 (Total Fluoride) "Ell 11 II IIII WV tg NNE iiIFJpIUU1uuuIIU y, f A, TEMP in C _ Residua! Chlorine (YM} Received on Ica (YIN) �) �� -.>•_. ,>F.� i 0 �sg.: ox � ei custody CooleSealer Cooler PM t o ? �t J - r _ �,'-' . , : !- , •;sty •.' Samples Intact (YM) =: t� : a1: c G , 4 %'F 2 a Page 12 of 12 Draft — Hydrogeological Conceptual Site Model Update — Badin Business Park 2019-05-06 EHS Support LLC Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 May 09, 2019 Michael W. Worden Environeering, Inc. 16100 Cairnway Suite 320 Houston, TX 77084 RE: Project: 137-265 OUTFALL 005/SURFACE WT Pace Project No.: 92428053 Dear Michael Worden: Enclosed are the analytical results for sample(s) received by the laboratory on May 07, 2019. The results relate only to the samples included in this report. Results reported herein conform to the most current, applicable TNI/NELAC standards and the laboratory's Quality Assurance Manual, where applicable, unless otherwise noted in the body of the report. If you have any questions concerning this report, please feel free to contact me. Sincerely, Ncylit Angela Baioni angela.baioni@pacelabs.com (704)875-9092 Project Manager Enclosures REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 1 of 18 CERTIFICATIONS Project: 137-265 OUTFALL 005/SURFACE WT Pace Project No.: 92428053 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Asheville Certification Ds 2225 Riverside Drive, Asheville, NC 28804 Florida/NELAP Certification #: E87648 Massachusetts Certification #: M-NC030 North Carolina Drinking Water Certification #: 37712 North Carolina Wastewater Certification #: 40 South Carolina Certification #: 99030001 VirginiaNELAP Certification #: 460222 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 2 of 18 SAMPLE SUMMARY Project: 137-265 OUTFALL 005/SURFACE WT Pace Project No.: 92428053 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Lab ID Sample ID Matrix Date Collected Date Received 92428053001 OUT005-01-2.510 Water 05/06/19 11:45 05/07/19 09:53 92428053002 OUT005-06-2.400 Water 05/06/19 13:00 05/07/19 09:53 92428053003 OUT005-07-2.210 Water 05/06/19 13:10 05/07/19 09:53 92428053004 OUT005-08-2.200 Water 05/06/19 13:20 05/07/19 09:53 92428053005 OUT005-09-2.100 Water 05/06/19 13:50 05/07/19 09:53 92428053006 OUT005-10-6.100 Water 05/06/19 14:00 05/07/19 09:53 92428053007 OUT005-11-6.000 Water 05/06/19 14:30 05/07/19 09:53 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 3 of 18 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 SAMPLE ANALYTE COUNT Project: 137-265 OUTFALL 005/SURFACE WT Pace Project No.: 92428053 Lab ID Sample ID Method Analytes Analysts Reported Laboratory 92428053001 OUT005-01-2.510 EPA 300.0 Rev 2.1 1993 CDC 1 PASI-A EPA 9012E KDF1 1 PASI-A 92428053002 OUT005-06-2.400 EPA 300.0 Rev 2.1 1993 CDC 1 PASI-A EPA 9012E KDF1 1 PASI-A 92428053003 OUT005-07-2.210 EPA 300.0 Rev 2.1 1993 CDC 1 PASI-A EPA 9012E KDF1 1 PASI-A 92428053004 OUT005-08-2.200 EPA 300.0 Rev 2.1 1993 CDC 1 PASI-A EPA 9012E KDF1 1 PASI-A 92428053005 OUT005-09-2.100 EPA 300.0 Rev 2.1 1993 CDC 1 PASI-A EPA 9012E KDF1 1 PASI-A 92428053006 OUT005-10-6.100 EPA 300.0 Rev 2.1 1993 CDC 1 PASI-A EPA 9012E KDF1 1 PASI-A 92428053007 OUT005-11-6.000 EPA 300.0 Rev 2.1 1993 CDC 1 PASI-A EPA 9012E KDF1 1 PASI-A REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 4 of 18 ANALYTICAL RESULTS Project: 137-265 OUTFALL 005/SURFACE WT Pace Project No.: 92428053 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: OUT005-01-2.510 Lab ID: 92428053001 Collected: 05/06/19 11:45 Received: 05/07/19 09:53 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 5.5 mg/L 0.20 0.10 2 05/09/19 03:19 16984-48-8 M1 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.28 mg/L 0.040 0.020 5 05/09/19 10:45 05/09/19 16:33 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 05/09/2019 05:45 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 5 of 18 ANALYTICAL RESULTS Project: 137-265 OUTFALL 005/SURFACE WT Pace Project No.: 92428053 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: OUT005-06-2.400 Lab ID: 92428053002 Collected: 05/06/19 13:00 Received: 05/07/19 09:53 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 3.7 mg/L 0.10 0.050 1 05/08/19 20:16 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.11 mg/L 0.0080 0.0040 1 05/09/19 10:45 05/09/19 16:21 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 05/09/2019 05:45 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 6 of 18 ANALYTICAL RESULTS Project: 137-265 OUTFALL 005/SURFACE WT Pace Project No.: 92428053 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: OUT005-07-2.210 Lab ID: 92428053003 Collected: 05/06/19 13:10 Received: 05/07/19 09:53 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 4.1 mg/L 0.10 0.050 1 05/08/19 20:31 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.044 mg/L 0.0080 0.0040 1 05/09/19 10:45 05/09/19 16:24 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 05/09/2019 05:45 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 7 of 18 ANALYTICAL RESULTS Project: 137-265 OUTFALL 005/SURFACE WT Pace Project No.: 92428053 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: OUT005-08-2.200 Lab ID: 92428053004 Collected: 05/06/19 13:20 Received: 05/07/19 09:53 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 4.7 mg/L 0.20 0.10 2 05/09/19 04:07 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.038 mg/L 0.0080 0.0040 1 05/09/19 10:45 05/09/19 16:25 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 05/09/2019 05:45 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 8 of 18 ANALYTICAL RESULTS Project: 137-265 OUTFALL 005/SURFACE WT Pace Project No.: 92428053 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: OUT005-09-2.100 Lab ID: 92428053005 Collected: 05/06/19 13:50 Received: 05/07/19 09:53 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 4.4 mg/L 0.10 0.050 1 05/08/19 21:01 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.042 mg/L 0.0080 0.0040 1 05/09/19 10:45 05/09/19 16:27 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 05/09/2019 05:45 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 9 of 18 ANALYTICAL RESULTS Project: 137-265 OUTFALL 005/SURFACE WT Pace Project No.: 92428053 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: OUT005-10-6.100 Lab ID: 92428053006 Collected: 05/06/19 14:00 Received: 05/07/19 09:53 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 0.50 mg/L 0.10 0.050 1 05/08/19 21:16 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide ND mg/L 0.0080 0.0040 1 05/09/19 10:45 05/09/19 16:28 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 05/09/2019 05:45 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 10 of 18 ANALYTICAL RESULTS Project: 137-265 OUTFALL 005/SURFACE WT Pace Project No.: 92428053 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: OUT005-11-6.000 Lab ID: 92428053007 Collected: 05/06/19 14:30 Received: 05/07/19 09:53 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 2.7 mg/L 0.10 0.050 1 05/08/19 21:31 16984-48-8 9012B Cyanide, Total Analytical Method: EPA 9012E Preparation Method: EPA 9012E Cyanide 0.041 mg/L 0.0080 0.0040 1 05/09/19 10:45 05/09/19 16:29 57-12-5 REPORT OF LABORATORY ANALYSIS Date: 05/09/2019 05:45 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 11 of 18 QUALITY CONTROL DATA Project: 137-265 OUTFALL 005/SURFACE WT Pace Project No.: 92428053 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QC Batch: 473978 Analysis Method: EPA 300.0 Rev 2.1 1993 QC Batch Method: EPA 300.0 Rev 2.1 1993 Analysis Description: 300.0 IC Anions Associated Lab Samples: 92428053001, 92428053002, 92428053003, 92428053004, 92428053005, 92428053006, 92428053007 METHOD BLANK: 2569872 Matrix: Water Associated Lab Samples: 92428053001, 92428053002, 92428053003, 92428053004, 92428053005, 92428053006, 92428053007 Blank Reporting Parameter Units Result Limit MDL Analyzed Qualifiers Fluoride mg/L ND 0.10 0.050 05/08/19 18:31 LABORATORY CONTROL SAMPLE: 2569873 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Fluoride mg/L 2.5 2.5 101 90-110 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2569874 2569875 MS MSD 92428053001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Fluoride mg/L 5.5 2.5 2.5 7.6 7.6 85 86 90-110 1 10 M1 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2569876 2569877 MS MSD 92428054004 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Fluoride mg/L 8.3 2.5 2.5 10.3 10.5 79 86 90-110 2 10 M1 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS Date: 05/09/2019 05:45 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 12 of 18 QUALITY CONTROL DATA Project: 137-265 OUTFALL 005/SURFACE WT Pace Project No.: 92428053 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QC Batch: 473935 Analysis Method: EPA 9012B QC Batch Method: EPA 9012E Analysis Description: EPA 9012B Cyanide Associated Lab Samples: 92428053001, 92428053002, 92428053003, 92428053004, 92428053005, 92428053006, 92428053007 METHOD BLANK: 2569635 Matrix: Water Associated Lab Samples: 92428053001, 92428053002, 92428053003, 92428053004, 92428053005, 92428053006, 92428053007 Blank Reporting Parameter Units Result Limit MDL Analyzed Qualifiers Cyanide mg/L ND 0.0080 0.0040 05/09/19 16:17 LABORATORY CONTROL SAMPLE: 2569636 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Cyanide mg/L 0.1 0.099 99 80-120 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2569637 2569638 MS MSD 92428053001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Cyanide mg/L 0.28 0.1 0.1 0.37 0.37 95 90 75-125 1 20 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2569639 2569640 MS MSD 92428053002 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Cyanide mg/L 0.11 0.1 0.1 0.19 0.19 81 84 75-125 1 20 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS Date: 05/09/2019 05:45 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 13 of 18 QUALIFIERS Project: 137-265 OUTFALL 005/SURFACE WT Pace Project No.: 92428053 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 DEFINITIONS DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot. ND - Not Detected at or above adjusted reporting limit. TNTC - Too Numerous To Count J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL - Adjusted Method Detection Limit. PQL - Practical Quantitation Limit. RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and bias for a specific analyte in a specific matrix. S - Surrogate 1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is a combined concentration. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD - Relative Percent Difference NC - Not Calculable. SG - Silica Gel - Clean -Up U - Indicates the compound was analyzed for, but not detected. Acid preservation may not be appropriate for 2 Chloroethylvinyl ether. A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA Method 8260. N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for each analyte is a combined concentration. Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes. TNI - The NELAC Institute. LABORATORIES PASI-A Pace Analytical Services - Asheville ANALYTE QUALIFIERS M1 Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery. REPORT OF LABORATORY ANALYSIS Date: 05/09/2019 05:45 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 14 of 18 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QUALITY CONTROL DATA CROSS REFERENCE TABLE Project: 137-265 OUTFALL 005/SURFACE WT Pace Project No.: 92428053 Lab ID Sample ID Analytical QC Batch Method QC Batch Analytical Method Batch 92428053001 OUT005-01-2.510 EPA 300.0 Rev 2.1 1993 473978 92428053002 OUT005-06-2.400 EPA 300.0 Rev 2.1 1993 473978 92428053003 OUT005-07-2.210 EPA 300.0 Rev 2.1 1993 473978 92428053004 OUT005-08-2.200 EPA 300.0 Rev 2.1 1993 473978 92428053005 OUT005-09-2.100 EPA 300.0 Rev 2.1 1993 473978 92428053006 OUT005-10-6.100 EPA 300.0 Rev 2.1 1993 473978 92428053007 OUT005-11-6.000 EPA 300.0 Rev 2.1 1993 473978 92428053001 OUT005-01-2.510 EPA 9012B 473935 EPA 9012B 474272 92428053002 OUT005-06-2.400 EPA 9012B 473935 EPA 9012B 474272 92428053003 OUT005-07-2.210 EPA 9012B 473935 EPA 9012B 474272 92428053004 OUT005-08-2.200 EPA 9012B 473935 EPA 9012B 474272 92428053005 OUT005-09-2.100 EPA 9012B 473935 EPA 9012B 474272 92428053006 OUT005-10-6.100 EPA 9012B 473935 EPA 9012B 474272 92428053007 OUT005-11-6.000 EPA 9012B 473935 EPA 9012B 474272 REPORT OF LABORATORY ANALYSIS Date: 05/09/2019 05:45 PM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 15 of 18 ./.1::#12aceAnalye1car4 1 ° Document Name: Sample Condition Upon Receipt{SCUR) Document Revised: February 7, 2018 Page 1 of Document No.: F-CAR-CS-O33-Rev.06 Issuing Authority: Pace Carolinas Quality Office Laboratory receiving samples: Asheville ❑ Eden❑ Greenwood ❑ Huntersville ❑ Raleigh Mechanicsville❑ Sample Condition Upon Receipt Courier. ❑ Commercial Client Name: GiUCG ❑Fed Ex ['Pace \NHS ❑UPS ❑LISPS ❑Other: Project; W0# • 92428053 Client Custody Seaf Present? ❑Yes No Seals Intact? ❑Yes ❑No Packing Material: :Bubble Wrap ❑Bubble Bags None ❑ Other Thermometer: T�� ❑IRGun ID•� ` Cooler Temp CC): 3 •'5 Correction Factor: Add/Subtract (°C) — 0 } 1 Cooler Ternp Corrected (°C)• ' USDA Regulated Soil (Q'N/A, water sample) Did samples originate In a quarantine zone within the United States: CA, NY, or SC Echeck maps)? nYes I-1No Date/Initials Person t:xamining Contents:0 J J° Type of Ice: let ❑Blue ❑None Biological Tissue F en? Des No /A Temp should be above freezing to 6'C ❑Samples out of temp criteria. Samples on Ice, cooling process has begun Did samples originate from a foreign source {Internationally, including Hawaii and Puerto Rico)? ❑Yes No Comments/0iscrepa ncy: Chain of Custody Present? Is ONa ❑N/A 1. Samples Arrived within Wald Time? �es ❑N ❑N/A 2. Short Hold Time Analysis (472 hr.)? Des (ril ❑NIA 3. Rush Tum Around Time Requested? ❑Yes No DN/A 4. Sufficient Volume? �s [No DNJA 5. Correct Containers Used? -Pace Containers Used? iris ❑No DN/A DNo ❑N/A 6. Containers Intact? eves ❑No ❑r. 7, Dissolved analysis: Samples Field Filtered? DiYes No N/A 8. Sample Labels Match COC? -Includes Date/time/ID/Analysis Matrix: \! Yes DNo DN/A 9. NI Y Headspace in VOA Vials (>S-6mm)? pees ❑No �/ N 10. Trip ?lank Present? Trip Blank Custody Seals Present? ❑Yes ❑No Dyes ❑No LE/N/A 11. COMMENTS/SAMPLE DISCREPANCY Field Data Required? ['Yes ❑No Lot ID of split containers: CLIENT NOTIFICATION/RESOLUTION Person contacted: Date/Time: Project Manager SCURF Review: Project Manager SRF Review: i ) ►1 )�711)) Date: Date: 1'% Page 16 of 16 2eA VICal^ Document Name: Sample Condition Upon Receipt(SCUA) Document Revised: February 7, 2018 Page 1 of 2 Document No.: FCAR-CS-033-Rev.06 Issuing Authority: Pace Carolinas Quality Office *Check mark top half of box if pH and/or dechiorination is verified and within the acceptance range for preservation samples. Exceptions: VOA, Coliform, TOC, Oil and Grease, DR0/8015 (water) DOC, LLHg **Bottom half of box is to list number of bottle Project 1p# : 92428053 PM: AMB Due Date: 05/10/19 CLIENT: 92-Alcoa AG15-I liter Amber 112504 (pH <2) AG3S-250 mL Amber Fl2SO4 (pH < 2) AG3A(D63A)-250 mL Amber NH4CI (N/A)(CI-) DG9H-40 mL VOA HCI (N/A) VG9T-40 mL VOA Na7S203 (N/A) VGSU-40 mL VOA Unp (N/A) DG9P-40 mL VOA H3PO4 (N/A) VOAI( (e vials per kit)-so3s kit (N/A) V/GK (3 vials per kit) VPH/Gas kit (N/A) SP5T-125 mL Sterile Plastic (N/A —lab) SP2T-250 mL Sterile Plastic (N/A — lab) BP3A-250 mt. Plastic (N1-12)2SO1 (9.3-9.7) ' 6 a G ,- E _, E `5 ' 6 0 Q a a 's 0 -G 4 E o N 6 w rDG9U-40 mL Amber Unpreserved vials (N/A) A' !' Sr a . a w ill cma u v� N F. E trl M 3 O. z d cu C = m T. E 0 yN7 N j CO z w 8 F. C t=.r m a E 0 7 P. , Z y 2 a I. m F. `v � 1.i J Lao U — v a 0 m V 8 i E N H Y1 P. v ry 9, m 0 = tf,N a E oo N N Z P. O z °� m cu a Q N u o. E to N r� N 0 V F. n a G Z V ro a E of 4 rui • 00 w a. C 7 rd - v y as E v $in W l� Q u C t w ,- Z E Q , _ (� Q v 2 .-. Z e Q 8 _ ,-1 Q Z - 8, n c ,- n E -J of N m S 1 t-\\\N> j: \ - \\\\\‘' 2 1 3\\I \ 4 , 11� \\ 5 \ 4 _ 6 \.11 \\ \ _ _ 7 l 1 \ 8 � 9 10\ 11 \ \\ 12 \ \ \ .. \\ pH Adjustment Log for Preserved Samples Sample ID Type -of -Preservative— —pH-upon-recelpt D Date -preservation -adjusted— Tme.preseo ation Amount of Preservative Lot # adjusted added l Note: Wheneve there is a discrepancy affecting North Carolina compliance samp es, a copy of this form will be se Out of hold, Incorrect preservative, out of temp, incorrect containers. Page 17 of 18 47 ,i4 cf) TEMP in C Re etved Ice NM) Custody Sealed Cooler IY)N) Samples intact .�4 z } r 0 ITEM # MATRIX CODE (see yard codes to la) SAMPLE TYPE (0.0RA9 GCOM°) m SAMPLE TEMP 0 OF CONTAIN Unpreserved H2504 HNO3 HC1 NaOH Na2S203 Methanol en d31a31100. z 0 T COLLECTION 25 Other '.::Analyses,"FTest sanneAJOS@Jd :YIN_` x x x x x x x 9012 (Total Cyanide) 300,0 (Total Fivaride) 72, —1.441 ro m L• m 3 a c 2 Page 18 of 18 Draft — Hydrogeological Conceptual Site Model Update — Badin Business Park 2019-09-19 EHS Support LLC Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 October 02, 2019 Michael W. Worden Environeering, Inc. 16100 Cairnway Suite 320 Houston, TX 77084 RE: Project: Upstream 005, 137-266 Pace Project No.: 92446441 Dear Michael Worden: Enclosed are the analytical results for sample(s) received by the laboratory on September 20, 2019. The results relate only to the samples included in this report. Results reported herein conform to the most current, applicable TNI/NELAC standards and the laboratory's Quality Assurance Manual, where applicable, unless otherwise noted in the body of the report. Some analyses have been subcontracted outside of the Pace Network. The subcontracted laboratory report has been attached. A revised report is being submitted on 10/2/19 to include an updated subcontract lab report. If you have any questions concerning this report, please feel free to contact me. Sincerely, any .aL 4'1, Angela Baioni angela.baioni@pacelabs.com (704)875-9092 Project Manager Enclosures REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 1 of 35 CERTIFICATIONS Project: Upstream 005, 137-266 Pace Project No.: 92446441 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Atlanta Certification IDs 110 Technology Parkway Peachtree Corners, GA 30092 Florida DOH Certification #: E87315 Georgia DW Inorganics Certification #: 812 Georgia DW Microbiology Certification #: 812 Ormond Beach Certification IDs 8 East Tower Circle, Ormond Beach, FL 32174 Alaska DEC- CS/UST/LUST Alabama Certification #: 41320 Arizona Certification# AZ0819 Colorado Certification: FL NELAC Reciprocity Connecticut Certification #: PH-0216 Delaware Certification: FL NELAC Reciprocity Florida Certification #: E83079 Georgia Certification #: 955 Guam Certification: FL NELAC Reciprocity Hawaii Certification: FL NELAC Reciprocity Illinois Certification #: 200068 Indiana Certification: FL NELAC Reciprocity Kansas Certification #: E-10383 Kentucky Certification #: 90050 Louisiana Certification #: FL NELAC Reciprocity Louisiana Environmental Certificate #: 05007 Maryland Certification: #346 Michigan Certification #: 9911 Mississippi Certification: FL NELAC Reciprocity Asheville Certification IDs 2225 Riverside Drive, Asheville, NC 28804 Florida/NELAP Certification #: E87648 Massachusetts Certification #: M-NC030 North Carolina Drinking Water Certification #: 37712 North Carolina Certification #: 381 South Carolina Certification #: 98011001 Virginia Certification #: 460204 Missouri Certification #: 236 Montana Certification #: Cert 0074 Nebraska Certification: NE-OS-28-14 New Hampshire Certification #: 2958 New Jersey Certification #: FL022 New York Certification #: 11608 North Carolina Environmental Certificate #: 667 North Carolina Certification #: 12710 North Dakota Certification #: R-216 Oklahoma Certification #: D9947 Pennsylvania Certification #: 68-00547 Puerto Rico Certification #: FL01264 South Carolina Certification: #96042001 Tennessee Certification #: TN02974 Texas Certification: FL NELAC Reciprocity US Virgin Islands Certification: FL NELAC Reciprocity Virginia Environmental Certification #: 460165 West Virginia Certification #: 9962C Wisconsin Certification #: 399079670 Wyoming (EPA Region 8): FL NELAC Reciprocity North Carolina Wastewater Certification #: 40 South Carolina Certification #: 99030001 Virginia/VELAP Certification #: 460222 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 2 of 35 SAMPLE SUMMARY Project: Upstream 005, 137-266 Pace Project No.: 92446441 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Lab ID Sample ID Matrix Date Collected Date Received 92446441001 92446441002 92446441003 92446441004 92446441005 92446441006 Out005-05-NEW E65 Out005-06-2.400 Out005-07-2.210 Out005-08-2.200 Out005-11-6.000 Out005-13-2.050 Water Water Water Water Water Water 09/19/19 10:30 09/19/19 11:10 09/19/19 11:50 09/19/19 12:15 09/19/19 13:45 09/19/19 13:20 09/20/19 10:23 09/20/19 10:23 09/20/19 10:23 09/20/19 10:23 09/20/19 10:23 09/20/19 10:23 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 3 of 35 SAMPLE ANALYTE COUNT Project: Upstream 005, 137-266 Pace Project No.: 92446441 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Lab ID Sample ID Analytes Method Analysts Reported Laboratory 92446441001 0ut005-05-NEW E65 92446441002 0ut005-06-2.400 92446441003 0ut005-07-2.210 92446441004 0ut005-08-2.200 92446441005 0ut005-11-6.000 92446441006 0ut005-13-2.050 SM 2320B-2011 ECH 1 PASI-A SM 2540C-2011 NAL 1 PASI-A EPA 9034 JAD 1 PASI-GA EPA 9040C ECH 1 PASI-A EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA335.4 MH1 1 PASI-O EPA 350.1 Rev 2.0 1993 GC 1 PASI-A SM 2320B-2011 ECH 1 PASI-A SM 2540C-2011 NAL 1 PASI-A EPA 9034 JAD 1 PASI-GA EPA 9040C ECH 1 PASI-A EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA335.4 MH1 1 PASI-O EPA 350.1 Rev 2.0 1993 GC 1 PASI-A SM 2320B-2011 ECH 1 PASI-A SM 2540C-2011 NAL 1 PASI-A EPA 9034 JAD 1 PASI-GA EPA 9040C ECH 1 PASI-A EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA335.4 MH1 1 PASI-O EPA 350.1 Rev 2.0 1993 GC 1 PASI-A SM 2320B-2011 ECH 1 PASI-A SM 2540C-2011 NAL 1 PASI-A EPA 9034 JAD 1 PASI-GA EPA 9040C ECH 1 PASI-A EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA335.4 MH1 1 PASI-O EPA 350.1 Rev 2.0 1993 GC 1 PASI-A SM 2320B-2011 ECH 1 PASI-A SM 2540C-2011 NAL 1 PASI-A EPA 9034 JAD 1 PASI-GA EPA 9040C ECH 1 PASI-A EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA335.4 MH1 1 PASI-O EPA 350.1 Rev 2.0 1993 GC 1 PASI-A SM 2320B-2011 ECH 1 PASI-A SM 2540C-2011 NAL 1 PASI-A REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 4 of 35 SAMPLE ANALYTE COUNT Project: Upstream 005, 137-266 Pace Project No.: 92446441 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Lab ID Sample ID Method Analytes Analysts Reported Laboratory EPA 9034 JAD 1 PASI-GA EPA 9040C ECH 1 PASI-A EPA 300.0 Rev 2.1 1993 BRJ 1 PASI-A EPA335.4 MH1 1 PASI-O EPA 350.1 Rev 2.0 1993 GC 1 PASI-A REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 5 of 35 ANALYTICAL RESULTS Project: Upstream 005, 137-266 Pace Project No.: 92446441 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-05-NEW E65 Lab ID: 92446441001 Collected: 09/19/19 10:30 Received: 09/20/19 10:23 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 2320B Alkalinity Analytical Method: SM 2320B-2011 Alkalinity, Total as CaCO3 129 mg/L 5.0 5.0 1 09/23/19 15:33 2540C Total Dissolved Solids Analytical Method: SM 2540C-2011 Total Dissolved Solids 164 mg/L 25.0 25.0 1 09/23/19 15:23 9034 Sulfide, Titration Analytical Method: EPA 9034 Preparation Method: EPA 9030A Sulfide 1.3 mg/L 1.0 1.0 1 09/24/19 11:40 09/24/19 18:05 18496-25-8 9040 pH Analytical Method: EPA 9040C pH at 25 Degrees C 7.8 Std. Units 0.10 0.10 1 09/25/19 15:50 H3 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 8.2 mg/L 0.30 0.15 3 09/22/19 06:29 16984-48-8 M1 335.4 Cyanide, Total Analytical Method: EPA 335.4 Preparation Method: EPA 335.4 Cyanide 0.0098J mg/L 0.010 0.0050 1 09/28/19 17:30 09/28/19 21:16 57-12-5 350.1 Ammonia Analytical Method: EPA 350.1 Rev 2.0 1993 Nitrogen, Ammonia 0.30 mg/L 0.10 0.070 1 09/26/19 19:06 7664-41-7 REPORT OF LABORATORY ANALYSIS Date: 10/02/2019 08:48 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 6 of 35 ANALYTICAL RESULTS Project: Upstream 005, 137-266 Pace Project No.: 92446441 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-06-2.400 Lab ID: 92446441002 Collected: 09/19/19 11:10 Received: 09/20/19 10:23 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 2320B Alkalinity Analytical Method: SM 2320B-2011 Alkalinity, Total as CaCO3 53.6 mg/L 5.0 5.0 1 09/23/19 15:43 2540C Total Dissolved Solids Analytical Method: SM 2540C-2011 Total Dissolved Solids 157 mg/L 25.0 25.0 1 09/23/19 15:23 9034 Sulfide, Titration Analytical Method: EPA 9034 Preparation Method: EPA 9030A Sulfide ND mg/L 1.0 1.0 1 09/24/19 11:40 09/24/19 18:14 18496-25-8 9040 pH Analytical Method: EPA 9040C pH at 25 Degrees C 7.8 Std. Units 0.10 0.10 1 09/25/19 15:53 H3 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 2.6 mg/L 0.10 0.050 1 09/21/19 23:59 16984-48-8 335.4 Cyanide, Total Analytical Method: EPA 335.4 Preparation Method: EPA 335.4 Cyanide 0.013 mg/L 0.010 0.0050 1 09/28/19 17:30 09/28/19 21:17 57-12-5 350.1 Ammonia Analytical Method: EPA 350.1 Rev 2.0 1993 Nitrogen, Ammonia ND mg/L 0.10 0.070 1 09/26/19 19:08 7664-41-7 REPORT OF LABORATORY ANALYSIS Date: 10/02/2019 08:48 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 7 of 35 ANALYTICAL RESULTS Project: Upstream 005, 137-266 Pace Project No.: 92446441 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-07-2.210 Lab ID: 92446441003 Collected: 09/19/19 11:50 Received: 09/20/19 10:23 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 2320B Alkalinity Analytical Method: SM 2320B-2011 Alkalinity, Total as CaCO3 58.4 mg/L 5.0 5.0 1 09/23/19 16:00 2540C Total Dissolved Solids Analytical Method: SM 2540C-2011 Total Dissolved Solids 199 mg/L 25.0 25.0 1 09/23/19 15:24 9034 Sulfide, Titration Analytical Method: EPA 9034 Preparation Method: EPA 9030A Sulfide ND mg/L 1.0 1.0 1 09/24/19 11:40 09/24/19 18:19 18496-25-8 9040 pH Analytical Method: EPA 9040C pH at 25 Degrees C 7.9 Std. Units 0.10 0.10 1 09/25/19 15:56 H3 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 3.5 mg/L 0.10 0.050 1 09/22/19 00:14 16984-48-8 335.4 Cyanide, Total Analytical Method: EPA 335.4 Preparation Method: EPA 335.4 Cyanide 0.0096J mg/L 0.010 0.0050 1 09/28/19 17:30 09/28/19 21:18 57-12-5 350.1 Ammonia Analytical Method: EPA 350.1 Rev 2.0 1993 Nitrogen, Ammonia ND mg/L 0.10 0.070 1 09/26/19 19:09 7664-41-7 REPORT OF LABORATORY ANALYSIS Date: 10/02/2019 08:48 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 8 of 35 ANALYTICAL RESULTS Project: Upstream 005, 137-266 Pace Project No.: 92446441 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-08-2.200 Lab ID: 92446441004 Collected: 09/19/19 12:15 Received: 09/20/19 10:23 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 2320B Alkalinity Analytical Method: SM 2320B-2011 Alkalinity, Total as CaCO3 83.8 mg/L 5.0 5.0 1 09/23/19 16:07 2540C Total Dissolved Solids Analytical Method: SM 2540C-2011 Total Dissolved Solids 185 mg/L 25.0 25.0 1 09/23/19 15:24 9034 Sulfide, Titration Analytical Method: EPA 9034 Preparation Method: EPA 9030A Sulfide ND mg/L 1.0 1.0 1 09/24/19 14:20 09/24/19 18:24 18496-25-8 9040 pH Analytical Method: EPA 9040C pH at 25 Degrees C 8.5 Std. Units 0.10 0.10 1 09/25/19 15:58 H3 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 20.9 mg/L 0.80 0.40 8 09/22/19 07:11 16984-48-8 335.4 Cyanide, Total Analytical Method: EPA 335.4 Preparation Method: EPA 335.4 Cyanide 0.0052J mg/L 0.010 0.0050 1 09/28/19 17:30 09/28/19 21:19 57-12-5 350.1 Ammonia Analytical Method: EPA 350.1 Rev 2.0 1993 Nitrogen, Ammonia 0.38 mg/L 0.10 0.070 1 09/26/19 19:11 7664-41-7 REPORT OF LABORATORY ANALYSIS Date: 10/02/2019 08:48 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 9 of 35 ANALYTICAL RESULTS Project: Upstream 005, 137-266 Pace Project No.: 92446441 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-11-6.000 Lab ID: 92446441005 Collected: 09/19/19 13:45 Received: 09/20/19 10:23 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 2320B Alkalinity Analytical Method: SM 2320B-2011 Alkalinity, Total as CaCO3 38.3 mg/L 5.0 5.0 1 09/23/19 16:14 2540C Total Dissolved Solids Analytical Method: SM 2540C-2011 Total Dissolved Solids 183 mg/L 25.0 25.0 1 09/23/19 15:24 9034 Sulfide, Titration Analytical Method: EPA 9034 Preparation Method: EPA 9030A Sulfide ND mg/L 1.0 1.0 1 09/24/19 14:20 09/24/19 18:28 18496-25-8 9040 pH Analytical Method: EPA 9040C pH at 25 Degrees C 7.5 Std. Units 0.10 0.10 1 09/25/19 16:12 H3 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 2.4 mg/L 0.10 0.050 1 09/22/19 00:42 16984-48-8 335.4 Cyanide, Total Analytical Method: EPA 335.4 Preparation Method: EPA 335.4 Cyanide 0.019 mg/L 0.010 0.0050 1 09/28/19 17:30 09/28/19 21:33 57-12-5 350.1 Ammonia Analytical Method: EPA 350.1 Rev 2.0 1993 Nitrogen, Ammonia ND mg/L 0.10 0.070 1 09/26/19 19:15 7664-41-7 REPORT OF LABORATORY ANALYSIS Date: 10/02/2019 08:48 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 10 of 35 ANALYTICAL RESULTS Project: Upstream 005, 137-266 Pace Project No.: 92446441 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: Out005-13-2.050 Lab ID: 92446441006 Collected: 09/19/19 13:20 Received: 09/20/19 10:23 Matrix: Water Report Parameters Results Units Limit MDL DF Prepared Analyzed CAS No. Qual 2320B Alkalinity Analytical Method: SM 2320B-2011 Alkalinity, Total as CaCO3 38.1 mg/L 5.0 5.0 1 09/23/19 16:20 2540C Total Dissolved Solids Analytical Method: SM 2540C-2011 Total Dissolved Solids 185 mg/L 25.0 25.0 1 09/23/19 15:24 9034 Sulfide, Titration Analytical Method: EPA 9034 Preparation Method: EPA 9030A Sulfide ND mg/L 1.0 1.0 1 09/24/19 14:20 09/24/19 18:33 18496-25-8 9040 pH Analytical Method: EPA 9040C pH at 25 Degrees C 7.1 Std. Units 0.10 0.10 1 09/27/19 10:53 D6,H3 300.0 IC Anions 28 Days Analytical Method: EPA 300.0 Rev 2.1 1993 Fluoride 2.4 mg/L 0.10 0.050 1 09/22/19 00:57 16984-48-8 335.4 Cyanide, Total Analytical Method: EPA 335.4 Preparation Method: EPA 335.4 Cyanide 0.017 mg/L 0.010 0.0050 1 09/28/19 17:30 09/28/19 21:34 57-12-5 350.1 Ammonia Analytical Method: EPA 350.1 Rev 2.0 1993 Nitrogen, Ammonia ND mg/L 0.10 0.070 1 09/26/19 19:16 7664-41-7 REPORT OF LABORATORY ANALYSIS Date: 10/02/2019 08:48 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 11 of 35 QUALITY CONTROL DATA Project: Upstream 005, 137-266 Pace Project No.: 92446441 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QC Batch: 499282 Analysis Method: SM 2320B-2011 QC Batch Method: SM 2320B-2011 Analysis Description: 2320E Alkalinity Associated Lab Samples: 92446441001, 92446441002, 92446441003, 92446441004, 92446441005, 92446441006 METHOD BLANK: 2686934 Matrix: Water Associated Lab Samples: 92446441001, 92446441002, 92446441003, 92446441004, 92446441005, 92446441006 Blank Reporting Parameter Units Result Limit MDL Analyzed Qualifiers Alkalinity, Total as CaCO3 mg/L ND 5.0 5.0 09/23/19 13:18 LABORATORY CONTROL SAMPLE: 2686935 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Alkalinity, Total as CaCO3 mg/L 50 52.3 105 80-120 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2686936 2686937 MS MSD 92446246011 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Alkalinity, Total as CaCO3 mg/L 174 50 50 224 227 100 105 80-120 1 25 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2686938 2686939 MS MSD 92446379003 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Alkalinity, Total as CaCO3 mg/L 34.5 50 50 76.5 76.8 84 84 80-120 0 25 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS Date: 10/02/2019 08:48 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 12 of 35 QUALITY CONTROL DATA Project: Upstream 005, 137-266 Pace Project No.: 92446441 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QC Batch: 499323 Analysis Method: SM 2540C-2011 QC Batch Method: SM 2540C-2011 Analysis Description: 2540C Total Dissolved Solids Associated Lab Samples: 92446441001, 92446441002, 92446441003, 92446441004, 92446441005, 92446441006 METHOD BLANK: 2687206 Matrix: Water Associated Lab Samples: 92446441001, 92446441002, 92446441003, 92446441004, 92446441005, 92446441006 Blank Reporting Parameter Units Result Limit MDL Analyzed Qualifiers Total Dissolved Solids mg/L ND 25.0 25.0 09/23/19 15:22 LABORATORY CONTROL SAMPLE: 2687207 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Total Dissolved Solids mg/L 250 264 106 90-110 SAMPLE DUPLICATE: 2687208 92446490012 Dup Parameter Units Result Result RPD Max RPD Qualifiers Total Dissolved Solids mg/L 75800 70400 7 5 D6 SAMPLE DUPLICATE: 2687209 92446441005 Dup Parameter Units Result Result RPD Max RPD Qualifiers Total Dissolved Solids mg/L 183 186 2 5 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS Date: 10/02/2019 08:48 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 13 of 35 QUALITY CONTROL DATA Project: Upstream 005, 137-266 Pace Project No.: 92446441 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QC Batch: 35855 Analysis Method: EPA 9034 QC Batch Method: EPA 9030A Analysis Description: 9034 Sulfide Waste Water Associated Lab Samples: 92446441001, 92446441002, 92446441003, 92446441004, 92446441005, 92446441006 METHOD BLANK: 161424 Matrix: Water Associated Lab Samples: 92446441001, 92446441002, 92446441003, 92446441004, 92446441005, 92446441006 Blank Reporting Parameter Units Result Limit MDL Analyzed Qualifiers Sulfide mg/L ND 1.0 1.0 09/24/19 17:55 LABORATORY CONTROL SAMPLE: 161425 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Sulfide mg/L 4 3.2 80 40-104 MATRIX SPIKE SAMPLE: 161426 92446441001 Spike MS MS % Rec Parameter Units Result Conc. Result % Rec Limits Qualifiers Sulfide mg/L 1.3 8 5.1 48 10-143 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS Date: 10/02/2019 08:48 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 14 of 35 QUALITY CONTROL DATA Project: Upstream 005, 137-266 Pace Project No.: 92446441 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QC Batch: 499302 Analysis Method: EPA 9040C QC Batch Method: EPA 9040C Analysis Description: 9040 pH Associated Lab Samples: 92446441001, 92446441002, 92446441003, 92446441004, 92446441005 SAMPLE DUPLICATE: 2687118 92445713001 Dup Parameter Units Result Result RPD Max RPD Qualifiers pH at 25 Degrees C Std. Units 8.5 8.6 0 9 H3 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS Date: 10/02/2019 08:48 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 15 of 35 QUALITY CONTROL DATA Project: Upstream 005, 137-266 Pace Project No.: 92446441 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QC Batch: 500302 Analysis Method: EPA 9040C QC Batch Method: EPA 9040C Analysis Description: 9040 pH Associated Lab Samples: 92446441006 SAMPLE DUPLICATE: 2691711 92446441006 Dup Parameter Units Result Result RPD Max RPD Qualifiers pH at 25 Degrees C Std. Units 7.1 6.9 3 9 D6,H3 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS Date: 10/02/2019 08:48 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 16 of 35 QUALITY CONTROL DATA Project: Upstream 005, 137-266 Pace Project No.: 92446441 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QC Batch: 499161 Analysis Method: EPA 300.0 Rev 2.1 1993 QC Batch Method: EPA 300.0 Rev 2.1 1993 Analysis Description: 300.0 IC Anions Associated Lab Samples: 92446441001, 92446441002, 92446441003, 92446441004, 92446441005, 92446441006 METHOD BLANK: 2686594 Matrix: Water Associated Lab Samples: 92446441001, 92446441002, 92446441003, 92446441004, 92446441005, 92446441006 Blank Reporting Parameter Units Result Limit MDL Analyzed Qualifiers Fluoride mg/L ND 0.10 0.050 09/21/19 22:03 LABORATORY CONTROL SAMPLE: 2686595 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Fluoride mg/L 2.5 2.4 98 90-110 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2686596 2686597 MS MSD 92446441001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Fluoride mg/L 8.2 2.5 2.5 9.6 9.7 56 57 90-110 0 10 M1 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2686598 2686599 MS MSD 92446336001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Fluoride mg/L 458 2.5 2.5 472 470 564 496 90-110 0 10 M6 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS Date: 10/02/2019 08:48 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 17 of 35 QUALITY CONTROL DATA Project: Upstream 005, 137-266 Pace Project No.: 92446441 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QC Batch: 574255 Analysis Method: EPA 335.4 QC Batch Method: EPA 335.4 Analysis Description: 335.4 Cyanide, Total Associated Lab Samples: 92446441001, 92446441002, 92446441003, 92446441004, 92446441005, 92446441006 METHOD BLANK: 3121028 Matrix: Water Associated Lab Samples: 92446441001, 92446441002, 92446441003, 92446441004, 92446441005, 92446441006 Blank Reporting Parameter Units Result Limit MDL Analyzed Qualifiers Cyanide mg/L ND 0.010 0.0050 09/28/19 20:53 LABORATORY CONTROL SAMPLE: 3121029 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Cyanide mg/L 0.05 0.052 105 90-110 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 3121030 3121031 MS MSD 20121976001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Cyanide mg/L ND 0.025 0.025 0.025 0.028 98 109 90-110 10 20 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 3121032 3121033 MS MSD 35499390001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Cyanide mg/L 0.0050U 0.025 0.025 0.027 0.027 105 106 90-110 0 20 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS Date: 10/02/2019 08:48 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 18 of 35 QUALITY CONTROL DATA Project: Upstream 005, 137-266 Pace Project No.: 92446441 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QC Batch: 500173 Analysis Method: EPA 350.1 Rev 2.0 1993 QC Batch Method: EPA 350.1 Rev 2.0 1993 Analysis Description: 350.1 Ammonia Associated Lab Samples: 92446441001, 92446441002, 92446441003, 92446441004, 92446441005, 92446441006 METHOD BLANK: 2691177 Matrix: Water Associated Lab Samples: 92446441001, 92446441002, 92446441003, 92446441004, 92446441005, 92446441006 Blank Reporting Parameter Units Result Limit MDL Analyzed Qualifiers Nitrogen, Ammonia mg/L ND 0.10 0.070 09/26/19 18:58 LABORATORY CONTROL SAMPLE: 2691178 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Nitrogen, Ammonia mg/L 5 5.0 99 90-110 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2691179 2691180 MS MSD 92446300001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Nitrogen, Ammonia mg/L 9.4 5 5 14.1 14.1 93 93 90-110 0 10 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 2691181 2691182 MS MSD 92445366001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Nitrogen, Ammonia mg/L ND 5 5 4.9 4.9 98 97 90-110 0 10 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS Date: 10/02/2019 08:48 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 19 of 35 QUALIFIERS Project: Upstream 005, 137-266 Pace Project No.: 92446441 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 DEFINITIONS DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot. ND - Not Detected at or above adjusted reporting limit. TNTC - Too Numerous To Count J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL - Adjusted Method Detection Limit. PQL - Practical Quantitation Limit. RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and bias for a specific analyte in a specific matrix. S - Surrogate 1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is a combined concentration. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD - Relative Percent Difference NC - Not Calculable. SG - Silica Gel - Clean -Up U - Indicates the compound was analyzed for, but not detected. Acid preservation may not be appropriate for 2 Chloroethylvinyl ether. A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA Method 8260. N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for each analyte is a combined concentration. Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes. TNI - The NELAC Institute. LABORATORIES PASI-A PASI-GA PASI-O Pace Analytical Services - Asheville Pace Analytical Services - Atlanta, GA Pace Analytical Services - Ormond Beach ANALYTE QUALIFIERS D6 The precision between the sample and sample duplicate exceeded laboratory control limits. H3 Sample was received or analysis requested beyond the recognized method holding time. M1 Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery. M6 Matrix spike and Matrix spike duplicate recovery not evaluated against control limits due to sample dilution. REPORT OF LABORATORY ANALYSIS Date: 10/02/2019 08:48 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 20 of 35 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QUALITY CONTROL DATA CROSS REFERENCE TABLE Project: Upstream 005, 137-266 Pace Project No.: 92446441 Lab ID Sample ID QC Batch Method Analytical QC Batch Analytical Method Batch 92446441001 0ut005-05-NEW E65 SM 2320B-2011 499282 92446441002 0ut005-06-2.400 SM 2320B-2011 499282 92446441003 0ut005-07-2.210 SM 2320B-2011 499282 92446441004 0ut005-08-2.200 SM 2320B-2011 499282 92446441005 0ut005-11-6.000 SM 2320B-2011 499282 92446441006 0ut005-13-2.050 SM 2320B-2011 499282 92446441001 0ut005-05-NEW E65 SM 25400-2011 499323 92446441002 0ut005-06-2.400 SM 25400-2011 499323 92446441003 0ut005-07-2.210 SM 25400-2011 499323 92446441004 0ut005-08-2.200 SM 25400-2011 499323 92446441005 0ut005-11-6.000 SM 25400-2011 499323 92446441006 0ut005-13-2.050 SM 25400-2011 499323 92446441001 0ut005-05-NEW E65 EPA 9030A 35855 EPA 9034 35898 92446441002 0ut005-06-2.400 EPA 9030A 35855 EPA 9034 35898 92446441003 0ut005-07-2.210 EPA 9030A 35855 EPA 9034 35898 92446441004 0ut005-08-2.200 EPA 9030A 35855 EPA 9034 35898 92446441005 0ut005-11-6.000 EPA 9030A 35855 EPA 9034 35898 92446441006 0ut005-13-2.050 EPA 9030A 35855 EPA 9034 35898 92446441001 0ut005-05-NEW E65 EPA 9040C 499302 92446441002 0ut005-06-2.400 EPA 9040C 499302 92446441003 0ut005-07-2.210 EPA 9040C 499302 92446441004 0ut005-08-2.200 EPA 9040C 499302 92446441005 0ut005-11-6.000 EPA 9040C 499302 92446441006 0ut005-13-2.050 EPA 9040C 500302 92446441001 0ut005-05-NEW E65 EPA 300.0 Rev 2.1 1993 499161 92446441002 0ut005-06-2.400 EPA 300.0 Rev 2.1 1993 499161 92446441003 0ut005-07-2.210 EPA 300.0 Rev 2.1 1993 499161 92446441004 0ut005-08-2.200 EPA 300.0 Rev 2.1 1993 499161 92446441005 0ut005-11-6.000 EPA 300.0 Rev 2.1 1993 499161 92446441006 0ut005-13-2.050 EPA 300.0 Rev 2.1 1993 499161 92446441001 0ut005-05-NEW E65 EPA 335.4 574255 EPA 335.4 574264 92446441002 0ut005-06-2.400 EPA 335.4 574255 EPA 335.4 574264 92446441003 0ut005-07-2.210 EPA 335.4 574255 EPA 335.4 574264 92446441004 0ut005-08-2.200 EPA 335.4 574255 EPA 335.4 574264 92446441005 0ut005-11-6.000 EPA 335.4 574255 EPA 335.4 574264 92446441006 0ut005-13-2.050 EPA 335.4 574255 EPA 335.4 574264 92446441001 0ut005-05-NEW E65 EPA 350.1 Rev 2.0 1993 500173 92446441002 0ut005-06-2.400 EPA 350.1 Rev 2.0 1993 500173 92446441003 0ut005-07-2.210 EPA 350.1 Rev 2.0 1993 500173 92446441004 0ut005-08-2.200 EPA 350.1 Rev 2.0 1993 500173 92446441005 0ut005-11-6.000 EPA 350.1 Rev 2.0 1993 500173 92446441006 0ut005-13-2.050 EPA 350.1 Rev 2.0 1993 500173 REPORT OF LABORATORY ANALYSIS Date: 10/02/2019 08:48 AM This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 21 of 35 Blank Present? r-cip /12Aatifical Document Name: Sample Condition Upon Recefpt(SCUR) Document No.: F-CAR•C5-033-Rev.06 Document Revised: February 7, 2018 • Page 2 of 2 IssaingAuthority: Pace Carolinas Quaffty Office Laboratory receiving samples: Asheville Q EdenD Greenwood [] Huntersville 0 5a171pl€Condition . Upn1r Receipt_ Courier: ❑ Cpmntertial Custody Seal Present? Raleigh[' Mechanicsvflle❑ I``r i WO#:92446441 i}�� � ,� t I l ^1L.r'l r I�rnject q; ❑Fed Ex ❑UPS USPS , Gfent QPace QCtther: 111111111111111111111 9244844! oyes go Seals intact? Oyes ONG fate/initials Person Examining CarrtentMM Client Name: Packing Maieilal: ['Bubble Wrap Thermometer. ❑IRGun aCil lre Coate( Temp rC): Cnaf er Temp Corrected ['C)• []Bubble Bags ['None/ ❑ Other Type of ice: [Wet ❑Blue Correction Factor: Acid/Subtract (°C) -- 3 • } USDA Regulated Sail ( N/A, water sample) Did samples originate in a quarantine zone within the United States: CA, NY, or SC (check. maps)? ❑Yes ONo 1 Chain of Custody Present? I Samples Arrived within Hold Titre? Short Hold Time Analysis (572 hr.)? Rush Turn Arc::nd ir.;c I?cy:.,i-•-tsv" • Sufficient Volume? Correct Containers Used? -Pace Containers Used? Containers intact? Dissolved analysis: Samples Reid Filtered? Sample Labels Match COC7 d'os pain aN/A o ❑N/A es ONo ❑N/A . ) 3. .rya:: Vim DPVA 4 ❑No ❑N/A ©No ON/A ONo ❑N/A ONo ON/A f7ess ONo ION/A -Includes Oate/me/ID/Analysts Matrix Y 1� (Dime BfologIcai Tissue ozen? Dyes ONo Tissue Temp should be above freezing to ti C ❑Samples out of temp critede.Samples on ice, coaling process has begun Did samples originate from a foreign source (internationally, including Hawaii and Puerto fuc3)7 ❑Yes ONo Comments/Discrepancy: Headspace In VOA Vials(>5-Smmj7 rip Blank Custody Seals Present? COMMEN1S/SAMPLE DtSCREPANGy Des ONo ❑Yes ❑Ntr—IktWA ❑Yes ONo Err/4/A Field Data Required? ❑Yes ❑No Lot ID of split containers: WENT NOTIFICATION/RESOLUTION ono--9_v) U P rto f ryv- S Foe Person contacted: MULQ) Project Manager SCURF Review: 0' Oata/71me: t r iaic G —z©-iq Date: (1~ L/ — l f Page 22 of 5 1161.6 126M ,�1(t Document Name: Sample Condition Upon Recelpt(SCUR) Document No.: F-CAR-CS.033-Rev.08 *Check mark top half of box if pH and/or de chlorination is verified and within the acceptance range for preservation samples. Exceptions: VOA, Coflform, €OC, Oil and Grease, DROP G1S (water) DOC, LLHg **Bottom half of box is to list number of bottle Document Revised: February 7, 2013 Pa ee 1 al 2 Issuing Authority: Pace Carolinas Quality Office Projectl WWI : 92446441 PM: AMB Due Date; 09/27/19 CLIENT: 92-Alcoa 4 z 0 tic Unpresery E m 2 a Uepreser4ed BP3U-25G mL Plastic sP2U-500 mL PlastiC V ar 0 c N a m HP31.4-250 mt. p a z V • h a qA a o q 0 z z x u Lo E E n e a m u 3 7 1.7 v w • 0 a 4 U N � y • z s 9 E 4 V a 0 O .0 E E ri a 4 z 0 x z n 4 E 0 N .ggi. Qd 0 a x z c II 0 E c9 I IN') 111 4 1111 'YO1 11' Or"' (3 vials per id .0 1 v u R N N F- a of E a' F- co m 0 n x z 3P3A-250 inL P x A s C E 4 J 7 a a C E N z m U a 7 `a• E 4 E 0 7 0 7 0 IiH Adjustment Log for Preserved Samples Sample ID Type of Preservative pH upon receipt pate preservation adjusted Time preservation adjusted Amount of Preservative added Lot S Page 23 of 3 Nate: Whenever there is a discrepancy affecting North CarcCoa compliance samples. a copy of this form will be sent to the North Carolln0 OEHNR Certification OThce 1i.a. 0 m m 1 Al ITEM # MATRIX CODE (see veld codes mlatt) SAMPLE TYPE IG=GRAB C=CO41P) chi N f�. x C3 TEMP in C Received an Ice mN) Cuslody Seeiad Cooler ffiNS Samples intact ff N) i x x x X X X X x x X x X X X rJ Q got rC1 x m m SAMPLE TEMP AT COLLECTION Ott) IOFCONTAINERS x X X Unp est,rved H2804 H NO3 MC] NaOM Na2S2Q3 Methanol Other Cyanide by335.4 Cyanide by ASTM D7611-12 Fluoride by 360.0'SM-4011 Alkatfnoy by 2320 AmmeNa by 350.1 pH by 9040 Sulfide by 9034 TDS by 2540C Residual Chlorine (YlN) 0 0 m �L~ m � a 5 1 Ct �7 f �aS 3 4 0 z 0 n -13 m to m d Z en C a —I El• v 1 O n g• . • 2 m cD 9 0 S= 83 a � a 0 n 5 m Page 24 of 35 Inter -Mountain Laboratories Your Environmental Monitoring Partner /' npl i„„,. 1673 Terra Avenue Sheridan, WY 82801 ph: (307) 672-8945 INTER -MOUNTAIN LABS Date: 10/1/2019 CLIENT: Pace Analytical Charlotte Project: Upstream 005, 137-266 Lab Order: S1909341 CASE NARRATIVE Report ID: S1909341002 (Replaces S1909341001) Samples 92446441001 0ut005-05 NEW E65, 92446441002 0ut005-06-2.400, 92446441003 0ut005-07-2.210, 92446441004 0ut005-08-2.200, 92446441005 0ut005-11-6.000 and 92446441006 0ut005-13-2.050 were received on September 23, 2019. All samples were received and analyzed within the EPA recommended holding times, except those noted below in this case narrative. Samples were analyzed using the methods outlined in the following references: "Standard Methods For The Examination of Water and Wastewater", approved method versions Test Methods for Evaluating Solid Waste, Physical/Chemical Methods, SW-846, 3rd Edition 40 CFR Parts 136 and 141 40 CFR Part 50, Appendices B, J, L, and 0 Methods indicated in the Methods Update Rule published in the Federal Register Friday, May 18, 2012 ASTM approved and recognized standards All Quality Control parameters met the acceptance criteria defined by EPA and Inter -Mountain Laboratories except as indicated in this case narrative. This report was issued to include the MDL and J qualifiers per client request. It replaces S1909341001. Reviewed by: John Jacobs, Project Manager Page 1 of 1 Page 25 of 35 Inter -Mountain Laboratories Your Environmental Monitoring Partner 1673 Terra Avenue Sheridan, WY 82801 ph: (307) 672-8945 INTER -MOUNTAIN LABS CLIENT: Pace Analytical Charlotte 9800 Kincey Ave Ste 100 Huntersville, NC 28078 Sample Analysis Report Client Sample ID 92446441001 Out005-05 NEW E65 Project: Upstream 005, 137-266 Matrix: Water COC ID: Date Reported: Report ID: Collection Date: Date Received: Lab ID: Work Order: 10/1/2019 S1909341002 (Replaces S1909341001) 9/19/2019 10:30:00 AM 9/23/2019 7:24:00 AM S1909341-001 S1909341 Analyses Result RL MDL Qual Units Method Date Analyzed/Init General Parameters Cyanide, Total Anions Fluoride 0.0045 8.7 0.02 0.1 0.0023 J 0.0292 mg/L ASTM D7511 mg/L SM 4500FC 09/25/2019 1559 AMB 09/25/2019 1430 AB These results apply only to the samples tested. Qualifiers: B E H L ND S X Analyte detected in the associated Method Blank Value above quantitation range Holding times for preparation or analysis exceeded Analyzed by another laboratory Not Detected at the Reporting Limit Spike Recovery outside accepted recovery limits Matrix Effect RL - Reporting Limit C Calculated Value G Analyzed at IML Gillette laboratory J Analyte detected below quantitation limits M Value exceeds Monthly Ave or MCL or is less than LCL 0 Outside the Range of Dilutions U Analysis reported under the reporting limit Reviewed by: John Jacobs, Project Manager Page 1 of 6 Page 26 of 35 Inter -Mountain Laboratories Your Environmental Monitoring Partner 1673 Terra Avenue Sheridan, WY 82801 ph: (307) 672-8945 INTER -MOUNTAIN LABS CLIENT: Pace Analytical Charlotte 9800 Kincey Ave Ste 100 Huntersville, NC 28078 Sample Analysis Report Client Sample ID 92446441002 Out005-06-2.400 Project: Upstream 005, 137-266 Matrix: Water COC ID: Date Reported: Report ID: Collection Date: Date Received: Lab ID: Work Order: 10/1/2019 S1909341002 (Replaces S1909341001) 9/19/2019 11:30:00 AM 9/23/2019 7:24:00 AM S1909341-002 S1909341 Analyses Result RL MDL Qual Units Method Date Analyzed/Init General Parameters Cyanide, Total Anions Fluoride 0.0092 2.8 0.02 0.1 0.0023 J 0.0292 mg/L ASTM D7511 mg/L SM 4500FC 09/25/20191601 AMB 09/25/2019 550 AB These results apply only to the samples tested. Qualifiers: B E H L ND S X Analyte detected in the associated Method Blank Value above quantitation range Holding times for preparation or analysis exceeded Analyzed by another laboratory Not Detected at the Reporting Limit Spike Recovery outside accepted recovery limits Matrix Effect RL - Reporting Limit C Calculated Value G Analyzed at IML Gillette laboratory J Analyte detected below quantitation limits M Value exceeds Monthly Ave or MCL or is less than LCL 0 Outside the Range of Dilutions U Analysis reported under the reporting limit Reviewed by: John Jacobs, Project Manager Page 2 of 6 Page 27 of 35 Inter -Mountain Laboratories Your Environmental Monitoring Partner 1673 Terra Avenue Sheridan, WY 82801 ph: (307) 672-8945 INTER -MOUNTAIN LABS CLIENT: Pace Analytical Charlotte 9800 Kincey Ave Ste 100 Huntersville, NC 28078 Sample Analysis Report Client Sample ID 92446441003 Out005-07-2.210 Project: Upstream 005, 137-266 Matrix: Water COC ID: Date Reported: Report ID: Collection Date: Date Received: Lab ID: Work Order: 10/1/2019 S1909341002 (Replaces S1909341001) 9/19/2019 11:50:00 AM 9/23/2019 7:24:00 AM S1909341-003 S1909341 Analyses Result RL MDL Qual Units Method Date Analyzed/Init General Parameters Cyanide, Total Anions Fluoride 0.0056 3.8 0.02 0.1 0.0023 J 0.0292 mg/L ASTM D7511 mg/L SM 4500FC 09/25/2019 1603 AMB 09/25/2019 554 AB These results apply only to the samples tested. Qualifiers: B E H L ND S X Analyte detected in the associated Method Blank Value above quantitation range Holding times for preparation or analysis exceeded Analyzed by another laboratory Not Detected at the Reporting Limit Spike Recovery outside accepted recovery limits Matrix Effect RL - Reporting Limit C Calculated Value G Analyzed at IML Gillette laboratory J Analyte detected below quantitation limits M Value exceeds Monthly Ave or MCL or is less than LCL 0 Outside the Range of Dilutions U Analysis reported under the reporting limit Reviewed by: John Jacobs, Project Manager Page 3 of 6 Page 28 of 35 Inter -Mountain Laboratories Your Environmental Monitoring Partner 1673 Terra Avenue Sheridan, WY 82801 ph: (307) 672-8945 INTER -MOUNTAIN LABS CLIENT: Pace Analytical Charlotte 9800 Kincey Ave Ste 100 Huntersville, NC 28078 Sample Analysis Report Client Sample ID 92446441004 Out005-08-2.200 Project: Upstream 005, 137-266 Matrix: Water COC ID: Date Reported: Report ID: Collection Date: Date Received: Lab ID: Work Order: 10/1/2019 S1909341002 (Replaces S1909341001) 9/19/2019 12:15:00 PM 9/23/2019 7:24:00 AM S1909341-004 S1909341 Analyses Result RL MDL Qual Units Method Date Analyzed/Init General Parameters Cyanide, Total Anions Fluoride ND 24.9 0.02 0.1 0.0023 0.0292 mg/L ASTM D7511 mg/L SM 4500FC 09/25/2019 1605 AMB 09/25/2019 1434 AB These results apply only to the samples tested. Qualifiers: B E H L ND S X Analyte detected in the associated Method Blank Value above quantitation range Holding times for preparation or analysis exceeded Analyzed by another laboratory Not Detected at the Reporting Limit Spike Recovery outside accepted recovery limits Matrix Effect RL - Reporting Limit C Calculated Value G Analyzed at IML Gillette laboratory J Analyte detected below quantitation limits M Value exceeds Monthly Ave or MCL or is less than LCL 0 Outside the Range of Dilutions U Analysis reported under the reporting limit Reviewed by: John Jacobs, Project Manager Page 4 of 6 Page 29 of 35 Inter -Mountain Laboratories Your Environmental Monitoring Partner 1673 Terra Avenue Sheridan, WY 82801 ph: (307) 672-8945 INTER -MOUNTAIN LABS CLIENT: Pace Analytical Charlotte 9800 Kincey Ave Ste 100 Huntersville, NC 28078 Sample Analysis Report Client Sample ID 92446441005 Out005-11-6.000 Project: Upstream 005, 137-266 Matrix: Water COC ID: Date Reported: Report ID: Collection Date: Date Received: Lab ID: Work Order: 10/1/2019 S1909341002 (Replaces S1909341001) 9/19/2019 1:45:00 PM 9/23/2019 7:24:00 AM S1909341-005 S1909341 Analyses Result RL MDL Qual Units Method Date Analyzed/Init General Parameters Cyanide, Total Anions Fluoride 0.0122 2.7 0.02 0.1 0.0023 J 0.0292 mg/L ASTM D7511 mg/L SM 4500FC 09/25/2019 1607 AMB 09/25/2019 605 AB These results apply only to the samples tested. Qualifiers: B E H L ND S X Analyte detected in the associated Method Blank Value above quantitation range Holding times for preparation or analysis exceeded Analyzed by another laboratory Not Detected at the Reporting Limit Spike Recovery outside accepted recovery limits Matrix Effect RL - Reporting Limit C Calculated Value G Analyzed at IML Gillette laboratory J Analyte detected below quantitation limits M Value exceeds Monthly Ave or MCL or is less than LCL 0 Outside the Range of Dilutions U Analysis reported under the reporting limit Reviewed by: John Jacobs, Project Manager Page 5 of 6 Page 30 of 35 Inter -Mountain Laboratories Your Environmental Monitoring Partner 1673 Terra Avenue Sheridan, WY 82801 ph: (307) 672-8945 INTER -MOUNTAIN LABS CLIENT: Pace Analytical Charlotte 9800 Kincey Ave Ste 100 Huntersville, NC 28078 Sample Analysis Report Client Sample ID 92446441006 Out005-13-2.050 Project: Upstream 005, 137-266 Matrix: Water COC ID: Date Reported: Report ID: Collection Date: Date Received: Lab ID: Work Order: 10/1/2019 S1909341002 (Replaces S1909341001) 9/19/2019 1:20:00 PM 9/23/2019 7:24:00 AM S1909341-006 S1909341 Analyses Result RL MDL Qual Units Method Date Analyzed/Init General Parameters Cyanide, Total Anions Fluoride 0.0125 2.6 0.02 0.1 0.0023 J 0.0292 mg/L ASTM D7511 mg/L SM 4500FC 09/25/2019 1609 AMB 09/25/2019 608 AB These results apply only to the samples tested. Qualifiers: B E H L ND S X Analyte detected in the associated Method Blank Value above quantitation range Holding times for preparation or analysis exceeded Analyzed by another laboratory Not Detected at the Reporting Limit Spike Recovery outside accepted recovery limits Matrix Effect RL - Reporting Limit C Calculated Value G Analyzed at IML Gillette laboratory J Analyte detected below quantitation limits M Value exceeds Monthly Ave or MCL or is less than LCL 0 Outside the Range of Dilutions U Analysis reported under the reporting limit Reviewed by: John Jacobs, Project Manager Page 6 of 6 Page 31 of 35 Inter -Mountain Laboratories Your Environmental Monitoring Partner INTER -MOUNTAIN LABS CLIENT: Work Order: Project: 1673 Terra Avenue Sheridan, WY 82801 Pace Analytical Charlotte S1909341 Upstream 005, 137-266 Cyanide, Total by inline UV ph: (307) 672-8945 ANALYTICAL QC SUMMARY REPORT Sample Type MBLK Date: 10/1/2019 Report ID: S1909341002 (Replaces S1909341001) Units: mg/L DI BLANK (09/25/19 15:39) Analyte RunNo: 171959 Result RL Spike Ref Samp %REC % Rec Limits Qual Cyanide, Total Cyanide, Total by inline UV Sample Type LCS ND 0.0200 Units: mg/L QC (09/25/19 15:45) Analyte RunNo: 171959 Result RL Spike Ref Samp %REC % Rec Limits Qual Cyanide, Total Cyanide, Total by inline UV 0.281 0.0200 0.299 Sample Type MS Units: mg/L 93.9 84-116 51909341-0066 (09/25/19 16:13) Analyte RunNo: 171959 Result RL Spike Ref Samp %REC % Rec Limits Qual Cyanide, Total Cyanide, Total by inline UV 0.535 0.0200 0.5 0.0125 104 80 - 120 Sample Type MSD Units: mg/L S1909341-006B (09/25/19 16:15) Analyte RunNo: 171959 Result RL Cone %RPD %REC % RPD Limits Qual Cyanide, Total Cyanide, Total by inline UV 0.539 0.0200 0.535 0.892 Sample Type DUP Units: mg/L 105 20 S1909341-006B (09/25/19 16:11) Analyte RunNo: 171959 Result RL Ref Samp %RPD %REC % RPD Limits Qual Cyanide, Total 0.0115 0.0200 0.0125 0 20 J Qualifiers: B G J ND R X Analyte detected in the associated Method Blank Analyzed at IML Gillette laboratory Analyte detected below quantitation limits Not Detected at the Reporting Limit RPD outside accepted recovery limits Matrix Effect E Value above quantitation range H Holding times for preparation or analysis exceeded L Analyzed by another laboratory 0 Outside the Range of Dilutions S Spike Recovery outside accepted recovery limits Paa9$of 35 Inter -Mountain Laboratories Your Environmental Monitoring Partner INTER -MOUNTAIN LABS CLIENT: Work Order: Project: 1673 Terra Avenue Sheridan, WY 82801 Pace Analytical Charlotte S1909341 Upstream 005, 137-266 Fluoride by SM 4500 ph: (307) 672-8945 ANALYTICAL QC SUMMARY REPORT Sample Type MBLK Date: 10/1/2019 Report ID: S1909341002 (Replaces S1909341001) Units: mg/L BLANK (09/24/19 13:28) Analyte RunNo: 171936 Result RL Spike Ref Samp %REC % Rec Limits Qual Fluoride ND 0.100 BLANK (09/25/19 14:15) Analyte RunNo: 171970 Result RL Spike Ref Samp %REC % Rec Limits Qual Fluoride Fluoride by SM 4500 Sample Type LCS ND 0.100 Units: mg/L ATQC (09/24/19 13:01) Analyte RunNo: 171936 Result RL Spike Ref Samp %REC % Rec Limits Qual Fluoride ATQC (09/25/19 13:46) Analyte Fluoride Fluoride by SM 4500 2.81 0.100 3 93.5 85 - 115 RunNo: 171970 Result RL Spike Ref Samp %REC % Rec Limits Qual Sample Type MS 2.90 0.100 3 Units: mg/L 96.7 85 - 115 S1909325-006ASPK MS (09/24/19 18:50) Analyte RunNo: 171936 Result RL Spike Ref Samp %REC % Rec Limits Qual Fluoride 2.54 0.100 2.5 0.301 89.4 80 - 120 S1909340-006ASPK MS (09/25/19 05:36) Analyte RunNo: 171936 Result RL Spike Ref Samp %REC % Rec Limits Qual Fluoride Fluoride by SM 4500 2.55 Sample Type MSD 0.100 2.5 0 Units: mg/L 102 80 - 120 51909325-006ASPK MSD (09/24/19 18:53) Analyte RunNo: 171936 Result RL Conc %RPD %REC % RPD Limits Qual Fluoride 2.56 0.100 2.54 0.978 90.4 20 51909340-006ASPK MSD (09/25/19 05:40) Analyte RunNo: 171936 Result RL Conc %RPD %REC % RPD Limits Qual Fluoride Fluoride by SM 4500 2.54 Sample Type DUP 0.100 2.55 0.509 Units: mg/L 101 20 L1909325-002AD (09/24/19 17:44) Analyte RunNo: 171936 Result RL Ref Samp %RPD %REC % RPD Limits Qual Fluoride 0.415 0.100 0.395 4.92 20 S1909340-005AD (09/25/19 05:08) Analyte RunNo: 171936 Result RL Ref Samp %RPD %REC % RPD Limits Qual Fluoride 0.646 0.100 0.674 4.28 20 Qualifiers: B G ND R X Analyte detected in the associated Method Blank Analyzed at IML Gillette laboratory Analyte detected below quantitation limits Not Detected at the Reporting Limit RPD outside accepted recovery limits Matrix Effect E Value above quantitation range H Holding times for preparation or analysis exceeded L Analyzed by another laboratory 0 Outside the Range of Dilutions S Spike Recovery outside accepted recovery limits PaP2Eb.nof 35 , Cooler Temperature on Receipt t 3 - °C I Custody Seal Y or I Rec 41 NI . - - ■ a , z f Cri a / C \ .� (I );- 1„-- it.. 6 / k ¥ # . \/ 4" § . , (. � _. � \} 9/19/2019 12:15 9/19/201913:45 9/19/2019 13:20 1—VeArta Lp-12 - %°Ii U� 9/19/2019 10:30 92446441001 9/19/2019 11:30 92446441002 9/19/201911:50 92446441003 . �.»\� §[ § (i b� 92446441004 92446441005 92446441006 . 1 .il .{ a q at / # ■ N. g Fy / _ eived on Ice / i ' r N I Samples Intao Y1or N -9 7 : Q , q �� , y ¥ k , >( , \~.6 \ 2� » <. \\ 2 . . ( .'- .. III LAB USE ONLY ■■MEN ■1111..■ . . / • — ] » 1 I ,, . .�. . .. 3. § c 7 § 2 Page 34 of 35 INTER -MOUNTAIN LAE15 Survey Meter # 77 `4 I — 2-- pH strip lot# ClS-7-t}(Q(, Thermometer SN# 3r L13-S Condition Upon Receipt (Attach to COC) Sample Receipt 1 Number of ice chests/packages received: Note as "OTC" if samples are received over the counter, unpackaged 2 Temperature of cooler/samples. 5(3 3 4 5 6 7 8 Temps Observed (°C): Temps Corrected (°C): ROI? c__Yes (If more than 8 coolers, please write on back) No Acceptable is : 0,1 ° to 10°C for Bacteria and 0.1 ° to 6°C for most other water parameters. Samples may not have had adequate time to cool following collection. Indicate ROI (Received on Ice) for iced samples received on the same day as sampled, in addition to temperature at receipt. Client contact for temperatures outside method criteria must be documented below. Emission rate of samples for radiochemical analyses < 0.5mR/hr? COC Number (If applicable): Do the number of bottles agree with the COC? Were the samples received intact? (no broken bottles, leaks, etc.) Were the sample custody seals intact? Is the COC properly completed, legible, and signed? Sample Verification, Labeling & Distribution 1 Were all requested analyses understood and appropriate? 2 Did the bottle labels correspond with the COC information? 3 Samples collected in method -prescribed containers? 4 Sample Preservation: pH at Receipt: Final pH (if added in lab): Total Metals ass Metals Nutrient Cyanide Sulfide Phenol SDWA Rads Yes No des PreservativelLot# Total Metals HNO3 ass Metals Filtered and preserved in metals Nutrient H2SO4 Cyanide NaOH Sulfide ZnAcet Phenol H2SO4 SDWA Rads HNO3 Preserved samples for Rad analysis accompanied by Field Blank? 5 VOA vials have <6mm headspace? 6 Were all analyses within holding time at the time of receipt? 7 Specially requested detection limits (RLs) assigned? 8 Have rush or project due dates been checked and accepted? 9 Do samples require subcontracted analyses? If "Yes`, which type of subcontracting is required? General Sample Receipt, Verification, Login, Labeling & Distribution completed by Yes Yes Yes ) Yes Yes Customer -Specified No No No No No No No (initials) : No No No No No cv5 Set ID: 51909 314 I NA Date/Time Added: Filtered and preserved in metals Certified Discrepancv_ Documentation (use back of sheet for notes on discrepancies) Any items listed above with a response of "No" or do not meet specifications must be resolved. Person Contacted: Initiated By: Problem: Resolution: Date/Time: Method of Contact: Phone: Email: Inter -Mountain Labs Receipt Checklist Rev 2.3 Revision Date: 3/28/Nge 35 of 35 Draft — Hydrogeological Conceptual Site Model Update — Badin Business Park 2020-03-30 Groundwater EHS Support LLC � titi eurofins (—Review your project results through TotalAccesss Visit us at: www.testamericainc.com Environment Testing TestAmerica ANALYTICAL REPORT Eurofins TestAmerica, Savannah 5102 LaRoche Avenue Savannah, GA 31404 Tel: (912)354-7858 Laboratory Job ID: 680-182269- Client Project/Site: Alcoa - Badin, NC r: Civil & Environmental Consultants Inc 2704 Cherokee Farm Way Suite 101 Knoxville, Tennessee 37920 Attn: Michael Worden Authorized for release by: 4/14/2020 6:02:31 PM Sheila Hoffman, Project Manager II (912)250-0279 sheila.hoffman@testamericainc.com The test results in this report meet all 2003 NELAC and 2009 TNI requirements for accredited parameters, exceptions are noted in this report. This report may not be reproduced except in full, and with written approval from the laboratory. For questions please contact the Project Manager at the e-mail address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature. Results relate only to the items tested and the sample(s) as received by the laboratory. Method Summary Client: Civil & Environmental Consultants Inc Job ID: 680-182269-1 Project/Site: Alcoa - Badin, NC Method Method Description Protocol Laboratory 300.0-1993 R2.1 Anions, Ion Chromatography MCAWW TAL SAV OIA-1677 Cyanide, Free (Flow Injection) 01 CORP TAL PIT Subcontract ASTM 7511-12 - Total Cyanide None SC0103 Protocol References: MCAWW = "Methods For Chemical Analysis Of Water And Wastes", EPA-600/4-79-020, March 1983 And Subsequent Revisions. None = None 01 CORP = 01 Corporation Instrument Manual. Laboratory References: SC0103 = Eurofins Lancaster Laboratories Env LLC, 2425 New Holland Pike, Lancaster, PA 17601, TEL (717)656-2300 TAL PIT = Eurofins TestAmerica, Pittsburgh, 301 Alpha Drive, RIDC Park, Pittsburgh, PA 15238, TEL (412)963-7058 TAL SAV = Eurofins TestAmerica, Savannah, 5102 LaRoche Avenue, Savannah, GA 31404, TEL (912)354-7858 Eurofins TestAmerica, Savannah Page 2 of 27 4/14/2020 Sample Summary Client: Civil & Environmental Consultants Inc Job ID: 680-182269-1 Project/Site: Alcoa - Badin, NC Lab Sample ID Client Sample ID Matrix Collected Received Asset ID 680-182269-1 FO-2 Water 03/30/20 11:15 04/01/20 15:30 680-182269-2 MW-31 Water 03/30/20 13:00 04/01/20 15:30 680-182269-3 MW-103 Water 03/30/20 13:50 04/01/20 15:30 680-182269-4 MW-104 Water 03/30/20 14:40 04/01/20 15:30 Eurofins TestAmerica, Savannah Page 3 of 27 4/14/2020 Definitions/Glossary Client: Civil & Environmental Consultants Inc Job ID: 680-182269-1 Project/Site: Alcoa - Badin, NC Glossary Abbreviation These commonly used abbreviations may or may not be present in this report. Listed under the "D" column to designate that the result is reported on a dry weight basis %R Percent Recovery CFL Contains Free Liquid CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) Dil Fac Dilution Factor DL Detection Limit (DoD/DOE) DL, RA, RE, IN Indicates a Dilution, Re -analysis, Re -extraction, or additional Initial metals/anion analysis of the sample DLC Decision Level Concentration (Radiochemistry) EDL Estimated Detection Limit (Dioxin) LOD Limit of Detection (DoD/DOE) LOQ Limit of Quantitation (DoD/DOE) MDA Minimum Detectable Activity (Radiochemistry) MDC Minimum Detectable Concentration (Radiochemistry) MDL Method Detection Limit ML Minimum Level (Dioxin) NC Not Calculated ND Not Detected at the reporting limit (or MDL or EDL if shown) PQL Practical Quantitation Limit QC Quality Control RER Relative Error Ratio (Radiochemistry) RL Reporting Limit or Requested Limit (Radiochemistry) RPD Relative Percent Difference, a measure of the relative difference between two points TEF Toxicity Equivalent Factor (Dioxin) TEQ Toxicity Equivalent Quotient (Dioxin) Eurofins TestAmerica, Savannah Page 4 of 27 4/14/2020 Case Narrative Client: Civil & Environmental Consultants Inc Job ID: 680-182269-1 Project/Site: Alcoa - Badin, NC Job ID: 680-182269-1 Laboratory: Eurofins TestAmerica, Savannah Narrative CASE NARRATIVE Client: Civil & Environmental Consultants Inc Project: Alcoa - Badin, NC Report Number: 680-182269-1 With the exceptions noted as flags or footnotes, standard analytical protocols were followed in the analysis of the samples and no problems were encountered or anomalies observed. In addition all laboratory quality control samples were within established control limits, with any exceptions noted below. Each sample was analyzed to achieve the lowest possible reporting limit within the constraints of the method. In the event of interference or analytes present at high concentrations, samples may be diluted. For diluted samples, the reporting limits are adjusted relative to the dilution required. RECEIPT The samples were received on 04/01/2020; the samples arrived in good condition, properly preserved and on ice. The temperature of the coolers at receipt was 8.2 C. FREE CYANIDE Samples FO-2 (680-182269-1), MW-31 (680-182269-2), MW-103 (680-182269-3) and MW-104 (680-182269-4) were analyzed for free cyanide in accordance with 1677. The samples were analyzed on 04/09/2020. No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. ANIONS BY ION CHROMATOGRAPHY (28 DAY) Samples FO-2 (680-182269-1), MW-31 (680-182269-2), MW-103 (680-182269-3) and MW-104 (680-182269-4) were analyzed for Anions by Ion Chromatography (28 Day) in accordance with EPA Method 300.0. The samples were analyzed on 04/05/2020, 04/08/2020 and 04/10/2020. No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. Subcontract Work Method ASTM 7511-12 - Total Cyanide: This method was subcontracted to Eurofins Lancaster Laboratories Env LLC. The subcontract laboratory certification is different from that of the facility issuing the final report. Eurofins TestAmerica, Savannah Page 5 of 27 4/14/2020 Client Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-182269-1 Project/Site: Alcoa - Badin, NC Client Sample ID: FO-2 Date Collected: 03/30/20 11:15 Date Received: 04/01/20 15:30 Lab Sample ID: 680-182269-1 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Fluoride 0.14 0.10 0.040 mg/L 04/05/20 02:41 1 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Free <0.00079 0.0020 0.00079 mg/L 04/09/20 08:41 1 Client Sample ID: MW-31 Date Collected: 03/30/20 13:00 Date Received: 04/01/20 15:30 Lab Sample ID: 680-182269-2 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Fluoride <0.040 0.10 0.040 mg/L 04/08/20 20:16 1 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Free <0.00079 0.0020 0.00079 mg/L 04/09/20 08:43 1 Client Sample ID: MW-103 Date Collected: 03/30/20 13:50 Date Received: 04/01/20 15:30 Lab Sample ID: 680-182269-3 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Fluoride 1.6 0.10 0.040 mg/L 04/08/20 20:29 1 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Free <0.00079 0.0020 0.00079 mg/L 04/09/20 08:45 1 Client Sample ID: MW-104 Date Collected: 03/30/20 14:40 Date Received: 04/01/20 15:30 Lab Sample ID: 680-182269-4 Matrix: Water Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Fluoride 3.4 0.10 0.040 mg/L 04/10/20 18:38 1 General Chemistry Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Free <0.00079 0.0020 0.00079 mg/L 04/09/20 08:47 1 Eurofins TestAmerica, Savannah Page 6 of 27 4/14/2020 QC Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-182269-1 Project/Site: Alcoa - Badin, NC Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Lab Sample ID: MB 680-614027/33 Matrix: Water Analysis Batch: 614027 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Fluoride <0.040 0.10 0.040 mg/L 04/04/20 21:12 1 Lab Sample ID: LCS 680-614027/34 Matrix: Water Analysis Batch: 614027 Analyte Client Sample ID: Lab Control Sample ITA Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Fluoride Lab Sample ID: LCSD 680-614027/35 Matrix: Water Analysis Batch: 614027 Analyte 2.00 2.17 mg/L 109 90 _ 110 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Spike LCSD LCSD %Rec. RPD Added Result Qualifier Unit D %Rec Limits RPD Limit Fluoride 2.00 2.20 mg/L 110 90 - 110 1 15 Lab Sample ID: MB 680-614461/10 Matrix: Water Analysis Batch: 614461 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Fluoride <0.040 0.10 0.040 mg/L 04/08/20 16:36 1 Lab Sample ID: LCS 680-614461/11 Matrix: Water Analysis Batch: 614461 Analyte Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Fluoride Lab Sample ID: LCSD 680-614461/12 Matrix: Water Analysis Batch: 614461 Analyte 2.00 2.07 mg/L 104 90. 110 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Spike LCSD LCSD %Rec. RPD Added Result Qualifier Unit D %Rec Limits RPD Limit Fluoride 2.00 2.08 mg/L 104 90 _ 110 0 15 Lab Sample ID: MB 680-614787/2 Matrix: Water Analysis Batch: 614787 Analyte Client Sample ID: Method Blank Prep Type: Total/NA MB MB Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Fluoride <0.040 0.10 0.040 mg/L 04/10/20 13:54 1 Lab Sample ID: LCS 680-614787/3 Matrix: Water Analysis Batch: 614787 Analyte Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Fluoride 2.00 2.16 mg/L 108 90 _ 110 Eurofins TestAmerica, Savannah Page 7 of 27 4/14/2020 QC Sample Results Client: Civil & Environmental Consultants Inc Job ID: 680-182269-1 Project/Site: Alcoa - Badin, NC Method: 300.0-1993 R2.1 - Anions, Ion Chromatography Lab Sample ID: LCSD 680-614787/4 Matrix: Water Analysis Batch: 614787 Analyte Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Spike LCSD LCSD %Rec. RPD Added Result Qualifier Unit D %Rec Limits RPD Limit Fluoride 2.00 2.16 mg/L 108 90 _ 110 0 15 Method: OIA-1677 - Cyanide, Free (Flow Injection) Lab Sample ID: MB 180-312484/22 Matrix: Water Analysis Batch: 312484 Analyte MB MB Client Sample ID: Method Blank Prep Type: Total/NA Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Cyanide, Free <0.00079 0.0020 0.00079 mg/L 04/09/20 08:33 1 PLab Sample ID: LCS 180-312484/21 Matrix: Water Analysis Batch: 312484 Analyte Client Sample ID: Lab Control Sample Prep Type: Total/NA Spike LCS LCS %Rec. Added Result Qualifier Unit D %Rec Limits Cyanide, Free Lab Sample ID: LCSD 180-312484/42 Matrix: Water Analysis Batch: 312484 Analyte 0.0500 0.0546 mg/L 109 82. 132 Client Sample ID: Lab Control Sample Dup Prep Type: Total/NA Spike LCSD LCSD %Rec. RPD Added Result Qualifier Unit D %Rec Limits RPD Limit Cyanide, Free 0.0500 0.0528 mg/L 106 82.132 3 20 Eurofins TestAmerica, Savannah Page 8 of 27 4/14/2020 QC Association Summary Client: Civil & Environmental Consultants Inc Project/Site: Alcoa - Badin, NC HPLC/IC Analysis Batch: 614027 Lab Sample ID Client Sample ID Job ID: 680-182269-1 Prep Type Matrix Method Prep Batch 680-182269-1 MB 680-614027/33 LCS 680-614027/34 LCSD 680-614027/35 Analysis Batch: 614461 Lab Sample ID FO-2 Method Blank Lab Control Sample Lab Control Sample Dup Client Sample ID Total/NA Total/NA Total/NA Total/NA Prep Type Water Water Water Water Matrix 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 Method Prep Batch 680-182269-2 680-182269-3 MB 680-614461/10 LCS 680-614461/11 LCSD 680-614461/12 Analysis Batch: 614787 Lab Sample ID MW-31 MW-103 Method Blank Lab Control Sample Lab Control Sample Dup Client Sample ID Total/NA Total/NA Total/NA Total/NA Total/NA Prep Type Water Water Water Water Water Matrix 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 Method Prep Batch 680-182269-4 MB 680-614787/2 LCS 680-614787/3 LCSD 680-614787/4 MW-104 Method Blank Lab Control Sample Lab Control Sample Dup Total/NA Total/NA Total/NA Total/NA Water Water Water Water 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 300.0-1993 R2.1 General Chemistry Analysis Batch: 312484 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 680-182269-1 680-182269-2 680-182269-3 680-182269-4 MB 180-312484/22 LCS 180-312484/21 LCSD 180-312484/42 FO-2 MW-31 MW-103 MW-104 Method Blank Lab Control Sample Lab Control Sample Dup Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Total/NA Water Water Water Water Water Water Water OIA-1677 OIA-1677 OIA-1677 OIA-1677 OIA-1677 OIA-1677 OIA-1677 Eurofins TestAmerica, Savannah Page 9 of 27 4/14/2020 Lab Chronicle Client: Civil & Environmental Consultants Inc Job ID: 680-182269-1 Project/Site: Alcoa - Badin, NC Client Sample ID: FO-2 Date Collected: 03/30/20 11:15 Date Received: 04/01/20 15:30 Lab Sample ID: 680-182269-1 Matrix: Water Prep Type Batch Batch Type Method Run Dil Initial Final Batch Prepared Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 614027 04/05/20 02:41 UI TAL SAV Instrument ID: CICK Analysis OIA-1677 Instrument ID: ALPKEM2 1 312484 04/09/20 08:41 CAK TAL PIT Client Sample ID: MW-31 Date Collected: 03/30/20 13:00 Date Received: 04/01/20 15:30 Lab Sample ID: 680-182269-2 Matrix: Water Prep Type Batch Batch Dil Initial Final Batch Prepared Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 614461 04/08/20 20:16 CS TAL SAV Instrument ID: CICH Analysis OIA-1677 Instrument ID: ALPKEM2 1 312484 04/09/20 08:43 CAK TAL PIT Client Sample ID: MW-103 Date Collected: 03/30/20 13:50 Date Received: 04/01/20 15:30 Lab Sample ID: 680-182269-3 Matrix: Water Prep Type Batch Batch Dil Initial Final Batch Prepared Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 614461 04/08/20 20:29 CS TAL SAV Instrument ID: CICH Analysis OIA-1677 Instrument ID: ALPKEM2 Client Sample ID: MW-104 Date Collected: 03/30/20 14:40 Date Received: 04/01/20 15:30 1 312484 04/09/20 08:45 CAK TAL PIT Lab Sample ID: 680-182269-4 Matrix: Water Prep Type Batch Batch Dil Initial Final Batch Prepared Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab Total/NA Total/NA Analysis 300.0-1993 R2.1 1 5 mL 5 mL 614787 04/10/20 18:38 CS TAL SAV Instrument ID: CICH Analysis OIA-1677 Instrument ID: ALPKEM2 1 312484 04/09/20 08:47 CAK TAL PIT Laboratory References: SC0103 = Eurofins Lancaster Laboratories Env LLC, 2425 New Holland Pike, Lancaster, PA 17601, TEL (717)656-2300 TAL PIT = Eurofins TestAmerica, Pittsburgh, 301 Alpha Drive, RIDC Park, Pittsburgh, PA 15238, TEL (412)963-7058 TAL SAV = Eurofins TestAmerica, Savannah, 5102 LaRoche Avenue, Savannah, GA 31404, TEL (912)354-7858 Eurofins TestAmerica, Savannah Page 10 of 27 4/14/2020 %s eurofins Lancaster Laboratories Environmental 2025 New Nola. Pihe, Lancaster, PA 17601 . 717-056-2300 . Fae:1173564766 . www.EunlnsVS.contLanc LabsEnv r>S ANALYSIS REPORT Prepared by: Prepared for: Eurofins Lancaster Laboratories Environmental 2425 New Holland Pike Lancaster, PA 17601 TestAmerica North Canton 4101 Shuffel Street NW North Canton OH 44720 Report Date: April 10, 2020 11:33 Project: Alcoa - Badin, NC Account #: 01042 Group Number: 2094784 State of Sample Origin: NC Electronic Copy To TestAmerica Attn: Beth Daughtry Electronic Copy To TestAmerica Attn: Sheila Hoffman Respectfully Submitted, Or -we Kay Hower (717) 556-7364 To view our laboratory's current scopes of accreditation please go to https://www.eurofinsus.com/environment- test i n g/I a b o rato ri a s/e u rof i n s-I a n ca ste r-I a bo rato ri es-e n v i ro n m e nta I /certifications -and -a ccred i tat i o n s-eurofins-1 a n ca ste r-I a b o rato ri a s- environmental/ . Historical copies may be requested through your project manager. FPa 1114ff1 7 4/14/2020 %s eurofins Lancaster Laboratories Environmental • 2025 New Holland Pike Lancaster, PP 1T66i . 7174$$-2$$$ . FAX; 717i6647ss . www.EurelmsLla,conJLanc LabsEnv SAMPLE INFORMATION Client Sample Description FO-2 (680-182269-1) Water MW-31 (680-182269-2) Water MW-103 (680-182269-3) Water MW-104 (680-182269-4) Water Sample Collection ELLE# Date/Time 03/30/2020 11:15 1292423 03/30/2020 13:00 1292424 03/30/2020 13:50 1292425 03/30/2020 14:40 1292426 The specific methodologies used in obtaining the enclosed analytical results are indicated on the Laboratory Sample Analysis Record. FPa '$4Sfi 7 4/14/2020 eurofins Lancaster Laboratories Environmental Analysis Report 2425 New Holland Pace, Lancaster, HA10601 . T1Y-656.2300 • Fax: 111-656.6T66 . www.EumNnalA.conllLancLaOSEno Sample Description: Project Name: Submittal Date/Time: Collection Date/Time: FO-2 (680-182269-1) Water Alcoa - Badin, NC Alcoa - Badin, NC 04/03/2020 09:57 03/30/2020 11:15 TestAmerica North Canton ELLE Sample #: WW 1292423 ELLE Group #: 2094784 Matrix: Water CAT No. Analysis Name Wet Chemistry 12823 Total Cyanide (water) CAS Number ASTM D7511 -12 57-12-5 Result mg/I N.D. Method Detection Limit* mg/I 0.0020 Limit of Quantitation mg/I 0.0060 Dilution Factor 1 CAT Analysis Name No. 12823 Total Cyanide (water) Laboratory Sample Analysis Record Method ASTM D7511 -12 Trial# Batch# Analysis Date and Time 1 20099123101A 04/08/2020 14:08 Analyst Dilution Factor Joseph E McKenzie 1 *=This limit was used in the evaluation of the final result FPa i33(*1 7 4/14/2020 eurofins Lancaster Laboratories Environmental Analysis Report 2425 New Holland Pace, Lancaster, HA10601 . T1Y-656.2300 • Fax: 111-656.6T66 . www.EumNnalA.conllLancLaOSEno Sample Description: Project Name: Submittal Date/Time: Collection Date/Time: MW-31 (680-182269-2) Water Alcoa - Badin, NC Alcoa - Badin, NC 04/03/2020 09:57 03/30/2020 13:00 TestAmerica North Canton ELLE Sample #: WW 1292424 ELLE Group #: 2094784 Matrix: Water CAT No. Analysis Name Wet Chemistry 12823 Total Cyanide (water) CAS Number ASTM D7511 -12 57-12-5 Result mg/I N.D. Method Detection Limit* mg/I 0.0020 Limit of Quantitation mg/I 0.0060 Dilution Factor 1 CAT Analysis Name No. 12823 Total Cyanide (water) Laboratory Sample Analysis Record Method ASTM D7511 -12 Trial# Batch# Analysis Date and Time 1 20099123101A 04/08/2020 14:05 Analyst Dilution Factor Joseph E McKenzie 1 *=This limit was used in the evaluation of the final result FPa'F4ff1l7 4/14/2020 eurofins Lancaster Laboratories Environmental Analysis Report 2425 New Holland Pace, Lancaster, PA 10601 . 212-656.2300 . Faz: 117.656.6T6fi . www.EumNnslA.comlLancLalasEno Sample Description: Project Name: Submittal Date/Time: Collection Date/Time: MW-103 (680-182269-3) Water Alcoa - Badin, NC Alcoa - Badin, NC 04/03/2020 09:57 03/30/2020 13:50 TestAmerica North Canton ELLE Sample #: WW 1292425 ELLE Group #: 2094784 Matrix: Water CAT No. Analysis Name Wet Chemistry 12823 Total Cyanide (water) CAS Number ASTM D7511 -12 57-12-5 Result mg/I N.D. Method Detection Limit* mg/I 0.0020 Limit of Quantitation mg/I 0.0060 Dilution Factor 1 CAT Analysis Name No. 12823 Total Cyanide (water) Laboratory Sample Analysis Record Trial# Batch# Analysis Date and Time ASTM D7511 -12 1 20099123101A 04/08/2020 14:01 Method Analyst Dilution Factor Joseph E McKenzie 1 *=This limit was used in the evaluation of the final result FP't4dfV7 4/14/2020 eurofins Lancaster Laboratories Environmental Analysis Report 2425 New Holland Pace, Lancaster, PA 10601 . 212-656.2300 . Faz: 117.656.6T6fi . www.EumNnslA.comlLancLalasEno Sample Description: Project Name: Submittal Date/Time: Collection Date/Time: MW-104 (680-182269-4) Water Alcoa - Badin, NC Alcoa - Badin, NC 04/03/2020 09:57 03/30/2020 14:40 TestAmerica North Canton ELLE Sample #: WW 1292426 ELLE Group #: 2094784 Matrix: Water CAT No. Analysis Name Wet Chemistry 12823 Total Cyanide (water) CAS Number ASTM D7511 -12 57-12-5 Result mg/I N.D. Method Detection Limit* mg/I 0.0020 Limit of Quantitation mg/I 0.0060 Dilution Factor 1 CAT Analysis Name No. 12823 Total Cyanide (water) Laboratory Sample Analysis Record Trial# Batch# Analysis Date and Time ASTM D7511 -12 1 20099123101A 04/08/2020 13:51 Method Analyst Dilution Factor Joseph E McKenzie 1 *=This limit was used in the evaluation of the final result FPa t(*1 7 4/14/2020 tiff eurofins Lancaster Laboratories Environmental Analysis Report 2425 New Holland Pace, Lancaster, HA1]601 . 217-656.2300 • Fax: 11]-656.676fi . www.EumNnsll$,coMLancLaOSEno Quality Control Summary Client Name: TestAmerica North Canton Group Number: 2094784 Reported: 04/10/2020 11:33 Matrix QC may not be reported if insufficient sample or site -specific QC samples were not submitted. In these situations, to demonstrate precision and accuracy at a batch level, a LCS/LCSD was performed, unless otherwise specified in the method. All Inorganic Initial Calibration and Continuing Calibration Blanks met acceptable method criteria unless otherwise noted on the Analysis Report. Analysis Name Batch number: 20099123101A Total Cyanide (water) Analysis Name Batch number: 20099123101A Total Cyanide (water) Method Blank Result MDL** LOQ mg/I mg/I mg/I Sample number(s): 1292423-1292426 N.D. 0.0020 0.0060 LCS/LCSD LCS Spike LCS LCSD Spike LCSD LCS LCSD LCS/LCSD RPD RPD Added Conc Added Conc %REC %REC Limits Max mg/I mg/I mg/I mg/I Sample number(s): 1292423-1292426 0.0400 0.0423 106 84-116 Unspiked (UNSPK) = the sample used in conjunction with the matrix spike Analysis Name Batch number: 20099123101A Total Cyanide (water) MS/MSD Unspiked MS Spike MS MSD Spike MSD MS MSD MS/MSD RPD RPD Conc Added Conc Added Conc %Rec %Rec Limits Max mg/I mg/I mg/I mg/I mg/I Sample number(s): 1292423-1292426 UNSPK: 1292426 N.D. 0.0200 0.0176 88 84-116 Laboratory Duplicate Background (BKG) = the sample used in conjunction with the duplicate Analysis Name Batch number: 20099123101A Total Cyanide (water) BKG Conc DUP Conc DUP RPD DUP RPD Max mg/I mg/I Sample number(s): 1292423-1292426 BKG: 1292426 N.D. N.D. 0 (1) 20 *- Outside of specification **-This limit was used in the evaluation of the final result for the blank (1) The result for one or both determinations was less than five times the LOQ. (2) The unspiked result was more than four times the spike added. FP 1774ffi 7 4/14/2020 Eurofins TestAmerica, Savannah 5102 LaRoche Avenue Savannah, GA 31404 Phone: 912-354-7858 Fax: 912-352-0165 0/2/- 2- Chain of Custody Record . eurafins Environment Testing TestAn'erica Client Information (Sub Contract Lab) Sampler: Lab PM: Hoffman, Sheila B Carrier Tracking No(s): COC No: 680-606489.1 Client Contact: Shipping/Receiving Phone: E-Mai : sheila.hoffman@testamericainc.com State of Origin: North Carolina Page: Page 1 of 1 Company: Eurofins Lancaster Laboratories Env LLC Accreditations Required (See note): State - North Carolina (WW/SW); State Program - North C ... Job #: 680-182269-1 Address: 2425 New Holland Pike, , Due Date Requested: 4/13/2020 Analysis Requested Preservation Codes: A -HCL M- Hexane B - NaOH N - None C - Zn Acetate O-AsNaO2 D - Nitric Acid P - Na204S E - NaHSO4 Q - Na2SO3 F - McOH R - Na2S203 G - Amchlor S - H2SO4 H - Ascorbic Acid T - TSP Dodecahydrate I - Ice U - Acetone J - DI Water V - MCAA K - EDTA W - pH 4-5 L -EDA z- other(speciry) Other: City: Lancaster TAT Requested (days): o e u -` `: SUB (ASTM 7511-12 - Total Cyanide)I ASTM 7511-121 Total Cyanide_. 3Total Number of containers State, Zip: PA, 17601 Phone: 717-656-2300(Tel) PO #:' Email: WO #: 0 'a 0s Project Name: Alcoa - Badin, NC Project #: 68023635 d mf Site: SSOW#: 3 Field Filtered Sang Sample Identification - Client ID (Lab ID) Sample Date Sample Time Sample Type (C=comp, G=grab) Matrix (w-warer,s-gaud o waaretae, eriIasae.A Jr) Special Instructions/Note: Preservation Code: FO-2 (680-182269-1) 3/30/20 11:15 Eastern Water X 1 Price from Lancaster is $36 per sample MW-31 (680-182269-2) 3/30/20 13:00 Eastern Water X 1 Price from Lancaster is $36 per sample MW-103 (680-182269-3) 3/30/20 13:50 Eastern Water X 1 Price from Lancaster is $36 per sample MW-104 (680-182269-4) 3/30/20 14:40 Eastern Water X 1 Price from Lancaster is $36 per sample Note: Since laboratory accreditations are subject to change, Eurofins TestAmerica places the ownership of method, analyte & accreditation comp tan e upon out subcontract laborato ies. This sample shipment is forwarded under cha'n-of-custody. If the laboratory does not currently maintain accreditation in the State of Origin listed above for analysis/tests/matrix being analyzed, the samples must be shipped back to the Eurofins TestAmerica laboratory or other Instructions will be provided. Any changes to accreditation status should be brought to Eurofins TestAmerica attention immediately. If all requested accreditations are current to date, return the signed Chain of Custody attesting to said complican e to Eurofins TestAmerica. Possible Hazard identification Unconfirmed Sample Disposal (A fee may be assessed if samples are retained longer than 1 month) Return To Client I I Disposal By Lab Archive For Months Deliverable Requested: I, II, III, IV, Other (specify) Primary Deliverable Rank: 2 Special Instructions/QC Requirements: Em ty Kit ' quished by: 'Date: Time: (Method of Shipment: li ish d bpi Cy/...T.. C) C Received by: Date/rime: Company is d by: Date/Time: Company Received by: Date/Time:tAl2.70 Company Relinquished by: Date/Tme: Company Reciv� D e ) ��++o pa Custody Seals Intact: A Yes 4 No Custody Seal No.: r'rs.-.. Ao ...1..LN+f L, le Temperatures) °C and Other Remarks: �`/[ 111111 v A ,A A , • Ver: 01/16/201 earo1-Ens Lancaster Laboratories Environmental Client: TestAmerica Sample Administration Receipt Documentation Log iiiiiiH11110111I IIIIII11111101111I Group Number(s): 4-?44— Doc Log ID: 280903 Delivery and Receipt Information Delivery Method: Fed Ex Number of Packages: 1 Arrival Date: 04/03/2020 Number of Projects: 1 Arrival Condition Summary Shipping Container Sealed: Custody Seal Present: Custody Seal Intact: Samples Chilled: Paperwork Enclosed: Samples Intact: Missing Samples: Extra Samples: Discrepancy in Container Qty on COC: Unpacked by Tamara Lugardo Yes Yes Yes Yes Yes Yes No No No Sample IDs on COC match Containers: Sample Date/Times match COC: Total Trip Blank Qty: Air Quality Samples Present: 0 Yes Yes No Samples Chilled Details Thermometer Types: DT = Digital (Temp. Bottle) IR = Infrared (Surface Temp) Cooler # Thermometer ID 1 46730061WS Corrected Temp Therm. Type 0.1 IR Ice Type Ice Present? Wet Y All Temperatures in °C. Ice Container Elevated Temp? Loose/Bag N Page 1 of 1 2425•New Holland Pike Lancaster, PA 17605-2425 FPalscefbqSfil7 T 717-656-2300 F 717-656-2681 www.LancTiir4.abo. Am el: eurofins Lancaster Laboratories Environmental Explanation of Symbols and Abbreviations The following defines common symbols and abbreviations used in reporting technical data: BMQL C cfu CP Units F g IU kg L Ib. m3 meq mg ppm ppb Dry weight basis Below Minimum Quantitation Level degrees Celsius colony forming units cobalt-chloroplatinate units degrees Fahrenheit gram(s) International Units kilogram(s) liter(s) pound(s) cubic meter(s) milliequivalents milligram(s) mL MPN N.D. ng NTU pg/L RL TNTC Ng pL umhos/cm MCL milliliter(s) Most Probable Number non -detect nanogram(s) nephelometric turbidity units picogram/liter Reporting Limit Too Numerous To Count microgram(s) microliter(s) micromhos/cm Maximum Contamination Limit less than greater than parts per million - One ppm is equivalent to one milligram per kilogram (mg/kg) or one gram per million grams. For aqueous liquids, ppm is usually taken to be equivalent to milligrams per liter (mg/I), because one liter of water has a weight very close to a kilogram. For gases or vapors, one ppm is equivalent to one microliter per liter of gas. parts per billion Results printed under this heading have been adjusted for moisture content. This increases the analyte weight concentration to approximate the value present in a similar sample without moisture. All other results are reported on an as -received basis. Analytical test results meet all requirements of the associated regulatory program (i.e., NELAC (TNI), DoD, and ISO 17025) unless otherwise noted under the individual analysis. Measurement uncertainty values, as applicable, are available upon request. Tests results relate only to the sample tested. Clients should be aware that a critical step in a chemical or microbiological analysis is the collection of the sample. Unless the sample analyzed is truly representative of the bulk of material involved, the test results will be meaningless. If you have questions regarding the proper techniques of collecting samples, please contact us. We cannot be held responsible for sample integrity, however, unless sampling has been performed by a member of our staff. This report shall not be reproduced except in full, without the written approval of the laboratory. Times are local to the area of activity. Parameters listed in the 40 CFR Part 136 Table II as "analyze immediately" are not performed within 15 minutes. WARRANTY AND LIMITS OF LIABILITY - In accepting analytical work, we warrant the accuracy of test results for the sample as submitted. THE FOREGOING EXPRESS WARRANTY IS EXCLUSIVE AND IS GIVEN IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED. WE DISCLAIM ANY OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING A WARRANTY OF FITNESS FOR PARTICULAR PURPOSE AND WARRANTY OF MERCHANTABILITY. IN NO EVENT SHALL EUROFINS LANCASTER LABORATORIES ENVIRONMENTAL, LLC BE LIABLE FOR INDIRECT, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGES INCLUDING, BUT NOT LIMITED TO, DAMAGES FOR LOSS OF PROFIT OR GOODWILL REGARDLESS OF (A) THE NEGLIGENCE (EITHER SOLE OR CONCURRENT) OF EUROFINS LANCASTER LABORATORIES ENVIRONMENTAL AND (B) WHETHER EUROFINS LANCASTER LABORATORIES ENVIRONMENTAL HAS BEEN INFORMED OF THE POSSIBILITY OF SUCH DAMAGES. We accept no legal responsibility for the purposes for which the client uses the test results. No purchase order or other order for work shall be accepted by Eurofins Lancaster Laboratories Environmental which includes any conditions that vary from the Standard Terms and Conditions, and Eurofins Lancaster Laboratories Environmental hereby objects to any conflicting terms contained in any acceptance or order submitted by client. Pagnefilt 4/14/2020 eu raf i ns Lancaster Laboratories Environmental Data Qualifiers Qualifier Definition C Result confirmed by reanalysis D1 Indicates for dual column analyses that the result is reported from column 1 D2 Indicates for dual column analyses that the result is reported from column 2 E Concentration exceeds the calibration range K1 Initial Calibration Blank is above the QC limit and the sample result is less than the LOQ K2 Continuing Calibration Blank is above the QC limit and the sample result is less than the LOQ K3 Initial Calibration Verification is above the QC limit and the sample result is less than the LOQ K4 Continuing Calibration Verification is above the QC limit and the sample result is less than the LOQ J (or G, I, X) Estimated value >= the Method Detection Limit (MDL or DL) and < the Limit of Quantitation (LOQ or RL) P Concentration difference between the primary and confirmation column >40%. The lower result is reported. P^ Concentration difference between the primary and confirmation column > 40%. The higher result is reported. U Analyte was not detected at the value indicated ✓ Concentration difference between the primary and confirmation column >100%. The reporting limit is raised due to this disparity and evident interference. W The dissolved oxygen uptake for the unseeded blank is greater than 0.20 mg/L. Z Laboratory Defined - see analysis report Additional Organic and Inorganic CLP qualifiers may be used with Form 1 reports as defined by the CLP methods. Qualifiers specific to Dioxin/Furans and PCB Congeners are detailed on the individual Analysis Report. Pag@ /1 Olt 4/14/2020 Eurofins TestAmerica, Savannah 5102 LaRoche Avenue Savannah, GA 31404 Phone: 912-354-7858 Fax: 912-352-0165 0/2/- 2- Chain of Custody Record ti eurafins Environment Testing TestAn'erica Client Information (Sub Contract Lab) Sampler: Lab PM: Hoffman, Sheila B Carrier Tracking No(s): COC No: 680-606489.1 Client Contact: Shipping/Receiving Phone: E-Mai : sheila.hoffman@testamericainc.com State of Origin: North Carolina Page: Page 1 of 1 Company: Eurofins Lancaster Laboratories Env LLC Accreditations Required (See note): State - North Carolina (WW/SW); State Program - North C ... Job #: 680-182269-1 Address: 2425 New Holland Pike, , Due Date Requested: 4/13/2020 Analysis Requested Preservation Codes: A -HCL M- Hexane B - NaOH N - None C - Zn Acetate O-AsNaO2 D - Nitric Acid P - Na204S E - NaHSO4 Q - Na2SO3 F - McOH R - Na2S203 G - Amchlor S - H2SO4 H - Ascorbic Acid T - TSP Dodecahydrate I - Ice U - Acetone J - DI Water V - MCAA K - EDTA W - pH 4-5 L -EDA z- other(speciry) Other: City: Lancaster TAT Requested (days): o e u -` `: SUB (ASTM 7511-12 - Total Cyanide)I ASTM 7511-121 Total Cyanide_. 3Total Number of containers State, Zip: PA, 17601 Phone: 717-656-2300(Tel) PO #:' Email: WO #: 0 'a 0s Project Name: Alcoa - Badin, NC Project #: 68023635 d mf Site: SSOW#: 3 Field Filtered Sang Sample Identification - Client ID (Lab ID) Sample Date Sample Time Sample Type (C=comp, G=grab) Matrix (w-warer,s-gaud o waaretae, eriIasae,Mar) Special Instructions/Note: Preservation Code: FO-2 (680-182269-1) 3/30/20 11:15 Eastern Water X 1 Price from Lancaster is $36 per sample MW-31 (680-182269-2) 3/30/20 13:00 Eastern Water X 1 Price from Lancaster is $36 per sample MW-103 (680-182269-3) 3/30/20 13:50 Eastern Water X 1 Price from Lancaster is $36 per sample MW-104 (680-182269-4) 3/30/20 14:40 Eastern Water X 1 Price from Lancaster is $36 per sample Note: Since laboratory accreditations are subject to change, Eurofins TestAmerica places the ownership of method, analyte & accreditation comp tan e upon out subcontract laborato ies. This sample shipment is forwarded under cha'n-of-custody. If the laboratory does not currently maintain accreditation in the State of Origin listed above for analysis/tests/matrix being analyzed, the samples must be shipped back to the Eurofins TestAmerica laboratory or other Instructions will be provided. Any changes to accreditation status should be brought to Eurofins TestAmerica attention immediately. If all requested accreditations are current to date, return the signed Chain of Custody attesting to said complican e to Eurofins TestAmerica. Possible Hazard identification Unconfirmed Sample Disposal (A fee may be assessed if samples are retained longer than 1 month) Return To Client I I Disposal By Lab Archive For Months Deliverable Requested: I, II, III, IV, Other (specify) Primary Deliverable Rank: 2 Special Instructions/QC Requirements: Em ty Kit ' quished by: 'Date: Time: (Method of Shipment: li ish d bpi Cy/...T.. C) C Received by: Date/rime: Company is d by: Date/Time: Company Received by: Date/Time:tAl2.70 Company Relinquished by: Date/Tme: Company Reciv� D e ) ��++o pa Custody Seals Intact: A Yes 4 No Custody Seal No.: ,1 r9ry L r1 le Temperatures) °C and Other Remarks: �`/[ 111111 7 v A ,A A , • Ver: 01/16/201 Chain of Custody Record Eurofins TestAmerica, Savannah COC No 680-114081-437331 Page Page 1 of 1 Y Preservation Codes: A - HCL M • Horan B - NaOH N - None C - Zn Acerale O - AsNaO2 0 • Ndnc And P - Na204S E - NeHSO4 O - Na2SO3 F - McOH R - Na25203 G - Amchlor S • H2SO4 H - Ascart,rc Acld T - TSP 0odecahydrete I - Ice U - Acetone J - D1 Water V • MCAA K•EDTA W-pH4-5 - EDA 2 • other isoeci1yl Other Special In struction sINote: f 51111111 pojsnJ to u�e4 RiiTg s EU a :4 m Special Instructions/0C Requirements Empty Kit Relinquished by: parr- Time �.., _ IMethoc; .••ornent1 a. ' pE U q U Q J n C a r , v z rn it Analysis Requested Iaule5103 j0 JaqurnN Rio' ` m H N 1101 b' C � �-' m n -+ b h - N R Lac PM Hoffman, Sheila B E Mao Shelia Koffman©testamerlcainc.com eA ¢ c m �:irn '') rJ01' Q�l y. ,/_. _____� N 1Q-9` apuaniri - OBL wd0a0 OK X k as j apiurRD • aa+A GL4S ----______-.1 qCC ci OalarTune !Company Custody Soaks intact: Custody Seal No' .1 Yes A No (ON io °SA) QSWISM Well 4., Z to ON JO soA} 21dweg paJa1H9 Akala )"^' ,-+--' [Deliverable Requesled: I, II, III, IV, Other (specify) 1 7 U d O G 6 E S V, TAT Requested (days): PO ti Purchase Order not required ` m Preservation Coda: m m t m a (1 St O ate' e� LE T q E \ W�d TOa c 2 as a N l n 1 Q LJ a Aio n3 '�' a` io VI`n O a m b �- m Si 5 L n 8 5 Toub z 5 ac Address 2704 Cherokee Farm Way Suite 101 y a. uX r91a1e.Z+ TN, 37920 b [mall mwordenlr7Q cecinc corr. Z ? rem1. x - a O U 11v 4 Sample Identification l C in . l 3 0 •ck E c� a a ro m +a -0 in fl 4 Client information em Contact Michael Warden Page 23 of 27 4/14/2020 Job #. 680-182269-1 Preservation Codes: A - HCL M - Hexane B -NaOH N - None C - Zn Acetate 0 - AsNa02 D - Nitric Acid P - Na204S E - NaHSO4 Q - Na2S03 F-Me0H R-Na2S203 G - Amchlor S - H2SO4 H - Ascorbic Acid T - TSP Dodecahydrate I - Ice U - Acetone J - DI Water V -MCAA K - EDTA W - pH 4-5 L - EDA Z - other (specify) Other: Special Instructions/Note: Note: Since laboratory accreditations are subject to change. Eurofins TestAmerica places the ownership of method, analyte & accreditation compliance upon out subcontract laboratories. This sample shipment is forwarded under chain -of -custody. If the laboratory does not currently maintain accreditation in the State of Origin listed above for analysis/tests/matrix being analyzed, the samples must be shipped back to the Eurofins TestAmerica Laboratory or other instructions will be provided. Any changes to accreditation status should be brought to Eurofins TestAmerica attention immediately. If all requested accreditations are current to date. return the signed Chain of Custody attesting to said complicance to Eurofins TestAmerica. Sample Disposal (A fee may be assessed if samples are retained longer than 1 month) I I Return To Client I I Disposal By Lab I I Archive For Months Special Instructions/QC Requirements: Empty Kit Relinquished by (Date: (Time: Method of Shipment: Company . L ; Company Company Cooler Temperature(s) °C and Other Remarks: e. rE I) a)a) 0 0 E t a) 0 Accreditations Required (See note): State - North Carolina (WW/SW); State Program - North C ... Analysis Requested siau!eluoo;o JagwnN lelol � r— ),) 1.1 'Ede" Received by Received by. Eurofins TestAmerica, Savannah 5102 LaRoche Avenue r� Chain of Custody Record Savannah, GA 31404 Phone: 912-354-7858 Fax: 912-352-0165 (uogaafuI moIj) eau'apiuel3 (aa.A LL9L X X X X g U Corhpany Company Custody Seal No (oN JO SEA) aSWISW uuoJad Possible Hazard Identification Unconfirmed Deliverable Requested: I, II, III, IV, Other (specify) Primary Deliverable Rank: 2 (oN JO saA) aidweS paJall!d Pla!d Company: TestAmerica Laboratories, Inc. Due Date Requested: 4/13/2020 TAT Requested (days): Project #: 68023635 Matrix (w=werer, s=sord. o-wesreion. er=T!ssue, A=ar) Preservation Code: is m Water Water Dal liwili 'E ? o N 0 y a U R 1- m II (n O 0 a) E ( R- 11:15 Eastern 13:00 Eastern 13:50 Eastern 14:40 Eastern a 3 cn Sample Date 0 CV O (7 o CVN O M 3/30/20 O O (-) Relinquished by: Ci7liro4.3cLLAciSL, Relinquished by: " v r Q Address. 301 Alpha Drive. RIDC Park. r m tj it StPA,ate. Zip -- -- I 15238 Phone: 412-963-7058(Tel) 412-963-2468(Fax) Project Name: Alcoa - Badin, NC iD Sample Identification - Client ID (Lab ID) FO-2(680-182269-1) MW-31 (680-182269-2) MW-103 (680-182269-3) IMW-104 (680-182269-4) Custody Seals Intact: Yes 1 No Page 24 of 27 4/14/2020 Login Sample Receipt Checklist Client: Civil & Environmental Consultants Inc Job Number: 680-182269-1 Login Number: 182269 List Number: 1 Creator: Laughlin, Paul D Question List Source: Eurofins TestAmerica, Savannah Answer Comment Radioactivity wasn't checked or is </= background as measured by a survey N/A meter. The cooler's custody seal, if present, is intact. True Sample custody seals, if present, are intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable. False Cooler Temperature is recorded. True COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True Is the Field Sampler's name present on COC? True There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True Sample Preservation Verified. N/A There is sufficient vol. for all requested analyses, incl. any requested True MS/MSDs Containers requiring zero headspace have no headspace or bubble is N/A <6mm (1/4"). Multiphasic samples are not present. True Samples do not require splitting or compositing. True Residual Chlorine Checked. N/A Refer to Job Narrative for details. Eurofins TestAmerica, Savannah Page 25 of 27 4/14/2020 Login Sample Receipt Checklist Client: Civil & Environmental Consultants Inc Job Number: 680-182269-1 Login Number: 182269 List Number: 2 Creator: Say, Thomas C Question List Source: Eurofins TestAmerica, Pittsburgh List Creation: 04/03/20 12:40 PM Answer Comment Radioactivity wasn't checked or is </= background as measured by a survey True meter. The cooler's custody seal, if present, is intact. True Sample custody seals, if present, are intact. True The cooler or samples do not appear to have been compromised or True tampered with. Samples were received on ice. True Cooler Temperature is acceptable. True Cooler Temperature is recorded. True COC is present. True COC is filled out in ink and legible. True COC is filled out with all pertinent information. True Is the Field Sampler's name present on COC? True There are no discrepancies between the containers received and the COC. True Samples are received within Holding Time (excluding tests with immediate True HTs) Sample containers have legible labels. True Containers are not broken or leaking. True Sample collection date/times are provided. True Appropriate sample containers are used. True Sample bottles are completely filled. True Sample Preservation Verified. True There is sufficient vol. for all requested analyses, incl. any requested True MS/MSDs Containers requiring zero headspace have no headspace or bubble is True <6mm (1/4"). Multiphasic samples are not present. True Samples do not require splitting or compositing. True Residual Chlorine Checked. N/A Eurofins TestAmerica, Savannah Page 26 of 27 4/14/2020 Accreditation/Certification Summary Client: Civil & Environmental Consultants Inc Project/Site: Alcoa - Badin, NC Job ID: 680-182269-1 Laboratory: Eurofins TestAmerica, Savannah The accreditations/certifications listed below are applicable to this report. Authority Program Identification Number Expiration Date North Carolina (WW/SW) State 269 12-31-20 Laboratory: Eurofins TestAmerica, Pittsburgh The accreditations/certifications listed below are applicable to this report. Authority Program Identification Number Expiration Date North Carolina (WW/SW) State 434 01-01-21 Eurofins TestAmerica, Savannah Page 27 of 27 4/14/2020 Focused Treatability Study Work Plan — Badin Business Park Appendix B EVOQUA Standard Analytical Testing Regime EHS Support LLC Focused Treatability Study Work Plan — Badin Business Park Purolite Special Resin Application — Minimum Required Information Date Customer Contact Email Location Phone Process Design Requirements (describe end use - potable, boiler feed, mining, etc.) Water usage Comments Max. Service Flow Rate gpm Average Daily Usage gpd pH Range Limitations Specific ion to be removed Target in treated water (ppb) Target in treated water (ppb) Specific ion to be removed Specific ion to be removed Target in treated water (ppb) Other limits on treated water Influent Solution (describe pretreatment present — MM filter, ACF, RO, etc.) EHS Support LLC Focused Treatability Study Work Plan — Badin Business Park 0 Purolite Influent Analysis Parameter Unit Value Comments Calcium, Ca ppm Magnesium, Mg ppm Total hardness as CaCO3 ppm Sodium, Na ppm Potassium, K ppm Barium, Ba ppm Strontium, Sr ppm Iron, Fe ppm Manganese, Mn ppm Radium, Ra pCi/L Sulfate, SO4 ppm Nitrate as NO3 ppm Nitrate as N ppm Nitrite as N ppm Bicarbonate, HCO3 ppm Bromide, Br ppm Chloride, CI ppm Chlorate, C103 ppm Fluoride, F ppm Boron, B ppm Silica, SiO2 ppm Selenate (SeO42") ppb Detection level to at least 5 ppb Selenite (Na2SeO3) ppb Detection level to at least 5 ppb Uranium, U ppb Detection level to at least 5 ppb Molybdate, Mo ppb Detection level to at least 5 ppb Antimony, Sb ppb Detection level to at least 5 ppb Chromium-6, Cr-6 ppb Detection level to at least 5 ppb Total As ppb As (III) ppb Vanadium, V ppb Detection level to at least 10 ppb Phosphate, PO4 ppb Detection level to at least 10 ppb Perchlorate ppb Detection to at least 1 ppb Other oxyanions ppb EHS Support LLC Focused Treatability Study Work Plan — Badin Business Park Parameter Unit Value Comments pH 0il & Grease ppm TOC ppm Free Chlorine ppm TSS ppm TDS ppm Conductivity µS/cm Temperature °C Parameter Unit Value Comments Other Metals: Bismuth, Bi ppb Cadmium, Cd ppb Copper, Cu ppb Cobalt, Co ppb Germanium, Ge ppb Gold, Au ppb Rhenium, Re ppb Rhodium, Rh ppb Lead, Pb ppb Mercury, Hg ppb Nickel, Ni ppb Platinum, Pt ppb Scandium ppb Silver, Ag ppb Tantalum ppb Tin, Sn ppb Tungsten, W ppb Zinc, Zn ppb EHS Support LLC