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HomeMy WebLinkAboutNCD024900987_20220301_Holcomb Creosote Company_ISCO Pilot Test Report DRAFT DRAFT IN SITU CHEMICAL OXIDATION PILOT TEST REPORT HOLCOMB CREOSOTE COMPANY SITE YADKINVILLE, YADKIN COUNTY, NORTH CAROLINA Prepared for: U.S. Environmental Protection Agency Region 4 Atlanta Federal Center 61 Forsyth Street, SW Atlanta, GA 30303-3104 Design and Engineering Services (DES) Contract 68HE0318D0006 Task Order 68HE0419F0104 Prepared by: HydroGeoLogic, Inc. DES CLIN 2 HGL Region 4 Office 1745 Phoenix Boulevard, Suite 200 Atlanta, GA 30349 April 2022 TABLE OF CONTENTS Section Page U.S. EPA Region 4 i 1.0 INTRODUCTION ........................................................................................................... 1-1 1.1 SITE OVERVIEW ............................................................................................... 1-1 1.1.1 Site History ............................................................................................ 1-1 1.1.2 Site Geology .......................................................................................... 1-2 1.1.3 Site Hydrogeology ................................................................................. 1-3 1.2 CONTAMINANTS OF CONCERN ................................................................... 1-4 2.0 ISCO PILOT TEST OBJECTIVES AND APPROACH ................................................. 2-1 2.1 ISCO PILOT TEST OBJECTIVES ..................................................................... 2-1 2.2 SUMMARY OF ISCO PILOT TEST APPROACH ........................................... 2-1 3.0 ISCO PILOT TEST IMPLEMENTATION ..................................................................... 3-1 3.1 ISCO PILOT TEST INJECTIONS ...................................................................... 3-1 3.1.1 Injection Overview and Schedule .......................................................... 3-1 3.1.2 Performance Monitoring and Injection Well Installation ...................... 3-1 3.1.3 Mobilization and Site Setup .................................................................. 3-3 3.1.4 Injection Equipment .............................................................................. 3-3 3.1.5 Injection Solution Batching ................................................................... 3-4 3.1.6 Injection Process Summary ................................................................... 3-4 3.1.7 Injection Implementation Details and Results ....................................... 3-6 3.1.8 Deviations from the Work Plan During Injection ................................. 3-8 3.1.9 PERFORMANCE MONITORING SAMPLING ................................. 3-9 3.2 INVESTIGATION-DERIVED WASTE ........................................................... 3-10 4.0 BASELINE AND PERFORMANCE MONITORING RESULTS ................................. 4-1 4.1 FIELD PARAMETERS ....................................................................................... 4-1 4.2 SVOCS ................................................................................................................. 4-2 4.3 METALS.............................................................................................................. 4-5 4.4 PERMANGANATE, HYDROGEN PEROXIDE, AND IRON FIELD TESTS .................................................................................................................. 4-7 5.0 CONCLUSIONS AND RECOMMENDATIONS .......................................................... 5-1 5.1 INJECTION PROCESS AND PARAMETERS .................................................. 5-1 5.2 GROUNDWATER CHEMISTRY ...................................................................... 5-1 5.3 CONTAMINANT REDUCTION EFFICACY ................................................... 5-1 5.4 RECOMMENDATIONS ..................................................................................... 5-2 6.0 REFERENCES ................................................................................................................ 6-1 LIST OF APPENDICES U.S. EPA Region 4 ii Appendix A Well Install and Sampling Field Forms Appendix B ISCO Injection Forms and Logs Appendix C Injection Photolog Appendix D Soil Boring Logs Appendix E Well Construction Logs Appendix F Laboratory Analytical Reports LIST OF TABLES Table 3.1 Injection Volume Summary Table 3.2 Daylighting Summary Table 3.3 Depth-to-Water During ISCO Injections Table 3.4 Injection Pressures and Flow Rates Summary Table 3.5 Geochemical Parameters During ISCO Injections Table 3.6 ISCO Pilot Test Sampling and Analysis Plan Table 4.1 Performance Monitoring Sampling Results: Field Parameters, Field Tests, and SVOCs Table 4.2 Performance Monitoring Sampling Results: Metals LIST OF FIGURES Figure 1.1 Site Location Figure 1.2 Site Facility Plan Figure 1.3A February 2020 Saprolite Groundwater Elevation Contours Figure 1.3B February 2020 Partially Weathered Rock Groundwater Elevation Contours Figure 1.3C March 2020 Saprolite Groundwater Elevation Contours Figure 1.3D March 2020 Partially Weathered Rock Groundwater Elevation Contours Figure 3.1 ISCO Pilot Test Injection Locations and Monitoring Well Layout Figure 4.1 Performance Monitoring Target Compounds Results - MW-57 Figure 4.2 Performance Monitoring Target Compounds Results - MW-58 Figure 4.3 Performance Monitoring Target Compounds Results - MW-2 Figure 4.4 Performance Monitoring Target Compounds Results - MW-6 Figure 4.5 Comparison of Week 2 Concentration Decrease to Pore Volume Displacement Figure 4.6 Comparison of Week 2 to Month 1 Concentration Decrease to Pore Volume Displacement LIST OF ACRONYMS AND ABBREVIATIONS U.S. EPA Region 4 iii % percent µg/L micrograms per liter BaP benzo(a)pyrene bgs below ground surface CoC chain of custody COC contaminant of concern DO dissolved oxygen DPT direct-push technology EPA U.S. Environmental Protection Agency ft feet or foot gal gallon Geosyntec Geosyntec Consultants of NC, P.C. GEX Geologic Exploration, Inc. gpm gallons per minute HCC Holcomb Creosote Company HGL HydroGeoLogic, Inc. IDW investigation-derived waste ISCO in situ chemical oxidation lb pound MFR modified Fenton’s reagent mg/L milligrams per liter msl mean sea level mV millivolts MW monitoring well NTU nephelometric turbidity unit ORP oxidation-reduction potential PAH polynuclear aromatic hydrocarbons PID photoionization detector ppm parts per million psi per square inch PVC polyvinyl chloride PWR partially weathered rock LIST OF ACRONYMS AND ABBREVIATIONS (Continued) U.S. EPA Region 4 iv Redox Tech Redox Tech, LLC RCRA Resource Conservation and Recovery Act RD Remedial Design RI Remedial Investigation ROD Record of Decision ROI radius of influence SAP Sampling and Analysis Plan Site Holcomb Creosote Company Superfund Site SVOC semivolatile organic compound TAL target analyte list TEQ toxic equivalence U.S. EPA Region 4 1-1 IN SITU CHEMICAL OXIDATION PILOT TEST REPORT HOLCOMB CREOSOTE COMPANY SITE YADKINVILLE, YADKIN COUNTY, NORTH CAROLINA 1.0 INTRODUCTION The U.S. Environmental Protection Agency (EPA) retained HydroGeoLogic, Inc. (HGL) to conduct Remedial Design (RD) activities for the Holcomb Creosote Company (HCC) Superfund Site (Site), in Yadkinville, North Carolina (Figures 1.1 and 1.2). The Site (EPA identification number NCD024900987) is located at 5016 U.S. Highway 601 just north of the town of Yadkinville, in Yadkin County, North Carolina. EPA published a Record of Decision (ROD) for the Site in August 2018 to address soil and groundwater contamination (EPA, 2018). The selected groundwater remedy in the ROD includes treating highly contaminated portions of the groundwater plume using in situ chemical oxidation (ISCO). An ISCO pilot test was performed between July 2021 (monitoring and injection well installation) and December 2021 to support the groundwater RD addressing naphthalene and other semivolatile organic compound (SVOC) contamination in the saprolite and partially weathered rock (PWR) aquifer zone. The ISCO pilot test was performed in accordance with Addendum to the Final Work Plan - In Situ Chemical Oxidation Treatability Study and In Situ Enhanced Bioremediation Pilot Test (Work Plan) submitted to EPA in July 2021 (HGL, 2021a). This report describes the procedures followed and results obtained during the ISCO pilot test to (i) evaluate the in situ oxidation of site contaminants of concern (COCs) via the delivery of two ISCO reagents (modified Fenton’s reagent [MFR] and sodium permanganate) into the subsurface; and (ii) assess field injection parameters including radius of influence (ROI) and injection pressure and flow rate for the saprolite and PWR aquifer zones. HGL and team subcontractor Geosyntec Consultants of NC, P.C. (Geosyntec) have prepared this report under EPA Design and Engineering Services contract 68HE0318D0006, Task Order 68HE0419F0104. 1.1 SITE OVERVIEW 1.1.1 Site History Information in this subsection is based on information provided in the ROD (EPA, 2018) and the Remedial Investigation (RI) Report (Versar, 2017a) and Feasibility Study Report (Versar, 2017b). A Site facility plan is provided in Figure 1.2. From 1951 to 2009, HCC operated a wood treating facility on the Site, manufacturing pressure-treated posts and lumber using creosote coal tar solutions. During facility operations, wood products were placed into a pressurized treatment vessel and heated with steam to open the pores of the wood and remove sap and resin. After an allotted time, the vessel was vented to decrease the interior pressure, and a vacuum was drawn to remove moisture. Following application of the vacuum, creosote was forced into the pores of the wood. The vapor stream from the treatment vessel was passed through a condenser, where the water/creosote mixture was liquefied. HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 1-2 After treatment, condensate from the condenser and from depressurization of the treatment vessel was pumped to a concrete-lined settling tank (i.e., the concrete storage pit). This liquid was pumped from the concrete storage pit to a steel settling tank, where the solids settled to the bottom. The liquids were then pumped to an unlined surface impoundment for storage and evaporation. After treatment, the wood was transported to a drip pad immediately south of the treatment vessel, where it was allowed to drip dry. In the early 1990s, HCC reportedly ceased using the drip pad; instead, the wood was allowed to dry inside the treatment vessel and was then moved to a transfer area located at the end of the treatment vessel. The transfer area measured approximately 25 feet (ft) by 100 ft and consisted of soil and gravel over a plastic liner and covered by a metal roof. One 55-gallon (gal) sump was located at each end of the treatment vessel to contain any spills that occurred when the treatment vessel doors were opened. Spilled creosote was pumped back into the treatment vessel. A catch basin was also located at the end of the treatment vessel where the treated lumber was removed. The treatment vessel was cleaned from time to time due to buildup of creosote and solids. This sludge-like waste was removed and placed in 55-gal containers that were stored in the drum storage area, until they were shipped off Site for disposal. The surface impoundment, located at the southeastern corner of the facility, reportedly was 30 ft by 60 ft by 6 ft deep (approximately 80,000-gal capacity) and was used by HCC to store liquid wastes until 1983. The surface impoundment contained waste classified as EPA hazardous waste K001 defined as: “bottom sediment sludge from the treatment of wastewaters from wood preserving processes that use creosote and/or pentachlorophenol.” Before 1981, HCC constructed a 0.587-acre landfarm on the east side of an unnamed tributary of North Deep Creek across from the operations area. Residual liquids from the surface impoundment were pumped to the landfarm, where an irrigation system was used to spray liquids onto the land surface. The landfarm was utilized when weather conditions did not allow for evaporation in the surface impoundment and when the surface impoundment was near its storage capacity. From 1982 to 1983, the landfarm was used as a remediation unit for disposal of K001-contaminated sludge and wastewater removed during closure of the surface impoundment. HCC ceased wood treating operations on the property in February 2009 and subsequently sold its assets at auction later that year. In October 2011, the Site was referred to the Comprehensive Environmental Response, Compensation, and Liability Act program to address known and potentially hazardous waste contamination. The transfer from former regulation under the Resource Conservation and Recovery Act (RCRA) program was required because all remediation activities at HCC had ceased due to lack of funds. 1.1.2 Site Geology Lithologies identified during previous soil boring and monitoring well (MW) installation at the Site consist of non-native/remolded fill, alluvium, saprolite, PWR, and metamorphic bedrock. These lithologic features are discussed below. • Non-native/remolded fill. Fill material in the form of a thin (approximately 1 to 2 ft thick) orange-brown silty clay was deposited on the Site following an EPA-lead removal of contaminated soils during 2011. This surface “cap” covers the Site from Highway 601 to HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 1-3 the west to within approximately 10 ft of an unnamed tributary of North Deep Creek to the east. A similar clay covers the hilltop near the closed RCRA landfarm to the east of the unnamed tributary. Additional remolded soils are present near the process buildings, likely remnants of Site construction and grading. • Alluvium. Alluvial sediments/soil are present flanking the stream channel of the unnamed tributary of North Deep Creek. Alluvial materials consist of graded beds of clay, silt, quartz, lithic and mica sands/gravels, and entrained organic/vegetative matter. The historical stream channel appears to have been broader than its present course, extending west toward the facility buildings. Reduction in the stream channel breadth is the result of backfill with remolded soil. Such fill materials cover the western margin of the unnamed tributary channel to a depth of approximately 5 ft. • Saprolite. Saprolitic soil at the Site was derived from in-place chemical weathering of the native metamorphic bedrock. Site-specific geology descriptions from the RI and Feasibility Study reports describe the saprolite as a predominantly clay matrix with abundant vermiculite and other silt to sand-sized micaceous phases and angular quartzite sand lenses. Soil descriptions from the pre-RD soil borings indicate higher than expected content of silt, sand, and gravel in the saprolite. Pre-RD saprolite soil samples submitted for geotechnical laboratory analysis were classified as either silty sand or sandy silt. • PWR. The saprolite transitions to an underlying weathered gneiss unit, identified in previous Site reports as PWR. Based on review of previous RI boring logs and soil descriptions from the pre-RD soil borings, the transition from saprolite to PWR occurs at a relatively consistent elevation of approximately 835 to 840 ft mean sea level (msl) over most of the western portion of the Site, generally west of the unnamed tributary that transects the Site from north to south. The upper portion of the PWR is highly weathered gneiss that consists of moderately dense, fined to coarse grained silty sand that is gray, white, and black in color. The PWR becomes increasingly dense with depth until it transitions to the underlying competent metamorphic bedrock. • Metamorphic bedrock. Bedrock beneath the Site consists of biotite and amphibolite gneisses with varying concentrations of purple garnet. Foliation dips from near horizontal to approximately 20 degrees, with localized foliation discontinuities at small scale folds and faults. Only a limited number of previous Site borings have been advanced into the bedrock. Review of the previous boring logs indicates that the top of competent rock is generally found at elevations of approximately 820 to 825 ft msl. 1.1.3 Site Hydrogeology Hydrogeologic units at the Site include the surficial aquifer and the gneiss bedrock aquifer. The surficial aquifer is comprised of the saprolite zone and the PWR zone. The saprolite zone is composed of the highly weathered portion of surficial aquifer closest to the land surface. The PWR zone contains weathered bedrock and saprolite and sits immediately above the bedrock. The surficial aquifer is from 10 to 40 ft thick at the former operations area. Water level measurements collected during the RI and the pre-RD investigations indicate that groundwater flow direction within the saprolite zone is generally toward the southeast. The flow direction is slightly more to the east-southeast in the PWR, and more eastward in the bedrock. The groundwater elevation contours in the saprolite and PWR from the February 2020 and March 2020 pre-RD investigations HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 1-4 are presented in Figures 1.3A to 1.3D. The vertical groundwater gradient is downward from the saprolite zone to the PWR zone to the bedrock aquifer in the higher surface elevations of the Site, which act as a recharge area. The distribution of groundwater contamination from the source area suggests that the unnamed tributary that transects the Site from north to south is acting as a discharge area and barrier to contaminant movement. 1.2 CONTAMINANTS OF CONCERN Based on the groundwater sampling results obtained during the RI and the human health risk assessment, the COCs presented below were identified for groundwater (based on assumed use as a residential drinking water source) and for soil (based on protection of the underlying groundwater). COCs based on direct contact to soil (ingestion, inhalation, and dermal contact) were not designated because there is no unacceptable risk for direct exposure to the soil for a future industrial worker. Preliminary remediation goals are provided in parenthesis for the COCs presented below. Groundwater • Cobalt (9 micrograms per liter [µg/L]) • Iron (20,256 µg/L) • Manganese (694 µg/L) • 1,1-Biphenyl (400 µg/L) • 2-Methylnapthalene (30 µg/L) • Acenaphthene (1,736 µg/L) • Dibenzofuran (28 µg/L) • Naphthalene (6 µg/L) • Benzo(a)pyrene (BaP) toxicity equivalent (TEQ) 0.005 µg/L • Ethyl benzene (600 µg/L) Soil • Naphthalene (180 micrograms per kilogram) The ISCO pilot test targeted SVOCs in groundwater, specifically 1,1-biphenyl, 2-methylnapthalene, acenaphthene, dibenzofuran, and naphthalene. HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 2-1 2.0 ISCO PILOT TEST OBJECTIVES AND APPROACH This section presents the ISCO pilot test objectives and a summary of the pilot test approach. 2.1 ISCO PILOT TEST OBJECTIVES The primary objective of the ISCO pilot test is to assess the effectiveness of the application of permanganate and MFR to degrade naphthalene and other SVOCs in groundwater, and to assess injection design parameters for the full-scale design of the selected ISCO remedy in the saprolite and PWR zones. The specific objectives of the ISCO pilot test are to: • Assess the effectiveness of sequential or standalone application of permanganate and MFR to oxidize naphthalene and other SVOCs (i.e., reduce their concentrations); o Sequential application of MFR and permanganate was tested in the PWR zone. o Standalone application of permanganate was tested in the saprolite zone. • Assess oxidant longevity in both the saprolite and PWR zones; • Assess the injection parameters such as injection flow rate, injection pressure, and injection ROI; and • Evaluate potential changes in geochemistry (e.g., pH and oxidation-reduction potential [ORP], dissolved oxygen [DO], dissolved metals) from the amendment applications. 2.2 SUMMARY OF ISCO PILOT TEST APPROACH Details of the ISCO pilot test design are provided in the Work Plan Addendum (HGL, 2021a) and summarized below. The ISCO pilot test area was located in the former surface impoundment in the vicinity of MWs MW-2 and MW-6 in the PWR zone and saprolite zone, respectively. The PWR zone design included the sequential injection of MFR (a combination of a hydrogen peroxide solution and a chelated iron catalyst solution) and sodium permanganate into the subsurface. MFR injections included two rounds of field injections, approximately two weeks apart. During MFR injections multiple injection fluids were injected including potable water (to establish flow and push material into the subsurface), diluted hydrogen peroxide, and a chelated iron catalyst solution. Two weeks following the second round of MFR injection, diluted sodium permanganate was injected into the subsurface. Two oxidants were selected for the PWR zone because treatability testing results indicated that each oxidant was effective at reducing concentrations of specific SVOCs. Permanganate treatment was generally successful at reducing concentrations of naphthalene, acenaphthene, 2-methynapthalene, and BaP TEQ, but was not effective for 1,1-biphenyl and dibenzofuran degradation. MFR treatment was the most effective for 1,1-biphenyl and dibenzofuran degradation but less effective than permanganate treatment in reducing BaP TEQ. HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 2-2 The saprolite zone design included the injection of sodium permanganate into the subsurface during a single mobilization. RemOx®-L, which is manufactured by Carus Group, Inc., was chosen as the sodium permanganate amendment. RemOx-L contains 40 percent (%) by weight sodium permanganate. A 30% by weight hydrogen peroxide solution was selected for the MFR design. The target intervals for the pilot test were the 10-ft injection intervals in the saturated saprolite zone above the PWR zone and saturated PWR zone. Direct-push technology (DPT) was used to deliver the oxidant into the saprolite zone at one location. Four injection wells were installed to deliver the oxidants into the PWR zone. HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 3-1 3.0 ISCO PILOT TEST IMPLEMENTATION This section presents details of the ISCO pilot test implementation, including performance monitoring and injection well installation, ISCO field injections, and performance monitoring sampling. 3.1 ISCO PILOT TEST INJECTIONS This section provides details of the implementation of the ISCO pilot test injections. Field forms documenting performance MW and injection well installation are provided in Appendix A. Field forms documenting the ISCO injections (including Daily Field Reports, batching and injection logs, and other monitoring logs) are provided in Appendix B. A photographic record of the injections is provided in Appendix C. 3.1.1 Injection Overview and Schedule ISCO pilot test injections were completed across four separate mobilizations. During these mobilizations performance monitoring and injection wells were installed, MFR and sodium permanganate were sequentially injected into the PWR zone, and sodium permanganate was injected into the saprolite zone. The general timeline for pilot test-related activities and a short summary is provided below. Details of these events are provided in the following subsections. • Performance Monitoring and Injection Well Installation: 26 to 30 July 2021 o HGL and subcontractors Geosyntec and Geologic Exploration, Inc. (GEX) installed two MWs and four permanent injection wells. • MFR Injections – Mobilization 1: 18 and 19 August 2021 o HGL and subcontractors Geosyntec and Redox Tech, LLC (Redox Tech) injected the first dose of MFR into the PWR zone using permanent injection wells. • MFR Injections – Mobilization 2: 2 September 2021 o HGL and subcontractors Geosyntec and Redox Tech injected the second dose of MFR into the PWR zone using permanent injection wells. • Sodium Permanganate Injections: 15 to 17 September 2021 o HGL and subcontractors Geosyntec and GEX completed sodium permanganate injections in the PWR zone and saprolite zone. They injected sodium permanganate into the PWR zone using permanent injections wells and into the saprolite zone using a temporary DPT injection point. 3.1.2 Performance Monitoring and Injection Well Installation HGL and subcontractor GEX installed the ISCO pilot test performance MWs (MW-57 and MW-58) and the ISCO pilot test injection wells (INJ-1 through INJ-4) from 26 to 30 July 2021 using sonic drilling techniques. The well locations are shown on Figure 3.1. During well installation, continuous soil cores were collected from each performance MW and injection well location. The soil cores were logged for color and soil classification, and screened HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 3-2 with a photoionization detector (PID) at regular intervals. Soil boring logs are provided in Appendix D. Transition from saprolite to PWR was gradual at each boring, and appeared to start at approximately 19 ft below ground surface (bgs). Elevated PID readings (greater than 20 parts per million [ppm]) were detected from 22 ft bgs to 26 ft bgs (MW-57) and 18 ft bgs to 27 ft bgs (MW-58), with maximum PID readings of 78.2 ppm (24 ft bgs at MW-57) and 64.8 ppm (21 ft bgs at MW-58). Compared to the MW soil cores, injection well soil cores exhibited more elevated PID readings at shallower intervals; PID readings greater than 100 ppm were measured near ground surface at injection wells INJ-1 and INJ-2. The MWs in the PWR zone were constructed of 2-inch Schedule 40 polyvinyl chloride (PVC) with 10 ft, 0.01-inch slotted screens installed from 23 to 33 ft bgs (at MW MW-57, bentonite chips were placed from 38 ft bgs up to the bottom of the screen at 33 ft bgs). A 20/30 sand filter pack was placed from the bottom of the screen to 1 ft above the top of screen. Each monitoring and injection well was constructed with a screen interval located approximately 2 ft below the bottom of the saprolite aquifer unit to allow for COC monitoring within the PWR layer. Monitoring Well Construction Forms are provided in Appendix E and the Monitoring Well Development Logs are provided in Appendix A. Each MW was constructed with a 3.0-ft bentonite seal above the filter pack, and grout was placed in the annular space between the borehole and the performance MW casing from the top of the bentonite seal to ground surface. Each MW was completed with a 2-ft by 2-ft concrete pad and an above-grade finish. MW casings extend approximately 3 ft above land surface and are protected with a locking casing. Each performance MW was developed 2 days following installation using a submersible pump and new tubing. During development, field parameters were collected, including temperature, specific conductivity, DO, pH, and turbidity. Approximately 40 gal and 55 gal of groundwater were purged from wells MW-57 and MW-58, respectively. Turbidity was measured to be 58 nephelometric turbidity units (NTUs) and 21 NTUs upon completion (MW-57 and MW-58, respectively). The injection wells were constructed of 2-inch Schedule 40 PVC with 10-ft, 0.01-inch slotted screens installed from 23 to 33 ft bgs. A 20/30 sand filter pack was placed from the bottom of the screen to 1 ft above the top of screen, except at INJ-4 (no filter pack was placed above the screen). Each injection well was constructed with a screen interval located approximately 1 to 2 ft below the bottom of the saprolite aquifer unit to allow for oxidant injection within the PWR layer. Injection Well Construction Forms are provided in Appendix E. Each injection well was constructed with a 3.0 to 7.0-ft bentonite seal above the filter pack, and grout was placed in the annular space between the borehole and the performance MW casing from the top of the bentonite seal to ground surface. Each MW was left uncompleted until after the injections were completed. Following completion of injection, each injection well was completed with a 2-ft by 2-ft concrete pad and an above-grade finish from 27 to 30 September 2021. Injection well casings extend approximately 3 ft above land surface and are protected with a locking casing. HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 3-3 3.1.3 Mobilization and Site Setup HGL and subcontractors Geosyntec and Redox Tech mobilized to the Site on 18 August 2021 to set up for the MFR injections. Site setup included staging injection and MFR batching equipment and materials and filling a potable water pillow tank that was staged at the entrance of the site. The equipment and materials were left on-Site in between MFR injection events. HGL and subcontractors Geosyntec and GEX mobilized to the Site on 15 September 2021 to set up for the sodium permanganate injections. Site setup included staging injection and sodium permanganate batching equipment and materials. 3.1.4 Injection Equipment Equipment used to inject the MFR solution into injection wells included: • One 250-gal tote for MFR solution mixing; • One 4,000-gal pillow tank; • One diaphragm pump to inject the MFR solution; o An air compressor was used to operate the diaphragm pump; • One injection manifold (during the second MFR injection event only), which allowed for injections to occur at two locations simultaneously, that included the following components: o Recordall® Model 25 flow meter to measure the total volume injected; o Assured Automation WM-PT Series paddle wheel flow meter to measure injection rates and volumes into one of the two injection locations; o GPI TM Series flow meter to measure injection rates and volumes into one of the two injection locations; o One pressure gauge for each manifold outlet; and o One ball valve for each manifold outlet flow control; • Hose, connections, and fittings to connect the injection equipment to the injection wells. Equipment used to inject the diluted sodium permanganate solution into the injection wells and DPT tooling included: • One DPT rig (Geoprobe 7822DT) to advance the temporary injection tooling into the saprolite zone; • Two 500-gal sodium permanganate solution mixing tanks; • One potable water storage tank; • Diaphragm pumps to transfer RemOx-L to batching tanks and inject the diluted sodium permanganate solution; o An air compressor was used to operate the diaphragm pump; HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 3-4 • One injection manifold, which allowed for injections to occur at two locations simultaneously, that included the following components: o Assured Automation WM-PT Series paddle wheel flow meters to measure injection rates and volumes into each injection location; o One pressure gauge for each manifold outlet; and o One ball valve for each manifold outlet flow control; • Injection well wellheads with bleed valves; • 2-ft DPT injection tooling; • Hose, connections, and fittings to connect the injection equipment to the injection wells and DPT injection head; and • Secondary containment for injection material, mixing equipment, and injection equipment. 3.1.5 Injection Solution Batching The injection solution batching process was similar for the MFR and sodium permanganate injections. Prior to injection each day, and as needed throughout the day, the injection solutions were generated by mixing the liquid oxidant with potable water. For MFR injections, sodium citrate was also added to each batch as a stabilizer. Across the three mobilizations, multiple mixing ratios were used based on field conditions, and they are summarized below: • MFR: Diluted hydrogen peroxide solutions were batched at approximately 8.4%, 4.2%, and 0.5% by weight using a 34% by weight hydrogen peroxide solution and potable water. o These relied on mixing ratios (34% hydrogen peroxide : potable water) of approximately 1 : 3.4, 1 : 8, and 1: 68, respectively. • Sodium permanganate: Diluted sodium permanganate solutions were batched at approximately 8.6% and 12.6% by weight sodium permanganate. o These relied on 500-gal batches with mixing ratios (40% sodium permanganate : potable water) of 83 : 417 and 126 : 374, respectively. A ferrous sulfate catalyst was also batched as part of the MFR injections. The catalyst was batched such that 1 pound (lb) of ferrous sulfate was added to 119 gal of potable water. MFR liquid measurements were made based on visual observations of levels in the 250-gal totes used for mixing. Scales were used to measure the amount of sodium citrate and ferrous sulfate. Sodium permanganate liquid measurements were made using in-line flow meters on the diaphragm pumps used to transfer RemOx-L and potable water to the 500-gal mixing tanks. Notes documenting that batching process are provided in Appendix B. 3.1.6 Injection Process Summary During the ISCO pilot study, two amendment delivery methods, permanent injection wells for the PWR zone and DPT for the saprolite zone, were used,. The general injection process was the same for both delivery methods. Low-pressure and low-flow injection techniques were used to inject the HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 3-5 MFR and sodium permanganate solutions into either the four permanent injection wells (INJ-1 through INJ-4) or the temporary DPT injection point (DPT-13). A diaphragm pump or gravity feeding was used to transfer the MFR or sodium permanganate solutions from the batching area to the active injection location(s) and into the subsurface. Injection pressures and flow rates were monitored and adjusted to maintain a sustainable injection rate. During the second MFR mobilization and sodium permanganate injections, a manifold was used to inject into up to two locations simultaneously. During injections, the following measurements were collected (details are provided in the subsequent section). • The injection flow rate, injection pressures (at the injection location), and total injection volumes were recorded at regular intervals. • Depth-to-water measurements were taken at regular intervals from MWs in and near the injection area before, during, and immediately following injections each day to evaluate potential groundwater mounding caused by the injectate. These MWs were MW-2, MW-3, MW-6, MW-7, MW-57, and/or MW-58. • Field parameters (pH, temperature, specific conductivity, ORP, and DO) were measured at MWs in and near the injection area at the beginning and end of each injection day (prior to injections starting and after injections stopped). Measurements were collected by deploying a water quality meter directly into each MW. This meter was decontaminated between wells. Monitoring wells MW-2, MW-3, MW-7, MW-57, and/or MW-58 were used for monitoring field parameters. During injection of both MFR and sodium permanganate, daylighting (surfacing of injectate to the ground surface through a preferential pathway) occurred across the injection area, which resulted in field adjustments. The field adjustments are reflected in the description of the injection processes below. Further details of the injections are provided in the subsequent section. For the PWR zone injections, diluted hydrogen peroxide and sodium permanganate solutions were injected into each injection well until the target injection volume was achieved or daylighting occurred. When daylighting occurred, injections were stopped and either restarted at a later time or moved to another injection well. The overall injection order for the PWR zone injections is outlined below: • An 8.4% (by weight) hydrogen peroxide solution was injected into the active injection well using a diaphragm pump, which resulted in daylighting at most locations. • A 4.2% (by weight) hydrogen peroxide solution was injected into the active injection well using a diaphragm pump, which resulted in daylighting at most locations. • A 0.5% (by weight) hydrogen peroxide solution was injected into active injection wells (up to two at a time) using gravity feed methods and/or a diaphragm pump, which resulted in daylighting at most locations. • An 8.6% (by weight) sodium permanganate solution was injected into active injection wells (up to two at a time) using gravity feed and/or a diaphragm pump, which resulted in daylighting at one location (INJ-3). HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 3-6 The overall injection process for the saprolite zone occurred via DPT as outlined below: • DPT injection tooling was advanced from land surface to the estimated top of the PWR aquifer zone (i.e., refusal). • Injection of a 12.6% (by weight) sodium permanganate solution was completed in four 2- foot intervals or lifts extending from the top of the PWR aquifer zone to 8 ft above the top of the PWR zone. Due to daylighting and damage to the injection tool, the planned fifth injection interval was not completed. • Injection continued in each injection interval until the target injection volume was reached or daylighting occurred. Once the target injection volume for that interval had been emplaced into the subsurface, the injection tooling was raised 2 ft and injection began again, unless subsurface conditions did not allow the target injection volume to be injected (discussed in the subsequent section). • The target injection volume of diluted sodium permanganate solution per interval was 131 gal. At the end of the saprolite injection, the injection borehole was abandoned using tremie grouting methods from the bottom up. All injection tooling used at an injection location was decontaminated with a heated pressure washer prior to leaving the Site. 3.1.7 Injection Implementation Details and Results Table 3.1 summarizes the oxidant quantities injected during the ISCO pilot test. Due to daylighting (discussed further below), the injection volumes deviated from the design. Field modifications were made with the goal of injecting the maximum volume of oxidant possible and injecting the maximum total volume of injection solutions. During the MFR injections, only one injection well (INJ-2) was able to receive chase water and catalyst (ferrous sulfate); all other injection wells received only a diluted hydrogen peroxide solution. During sodium permanganate injections, each injection well received diluted sodium permanganate; however, only INJ-1 and INJ-2 received the design volume. In total: • 81 gal of 34% hydrogen peroxide was injected into the injection wells; and o Design amount: 248 gal of 30% hydrogen peroxide • 350 gal of RemOx-L was injected into the subsurface (266.5 gal into injection wells and 88.5 gal into DPT-13). o Design amount: 525 gal Daylighting occurred during each injection mobilization and with both injection techniques (injection wells and DPT). A summary of when and where daylighting occurred, including what oxidant solution was being injected and how much had been injected before daylighting was observed, is provided in Table 3.2. Notable observations made during the injection are provided below. HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 3-7 • During the MFR injection, except injection well INJ-2, all injection wells experienced daylighting. No discernable difference was observed from the lithology of INJ-02 to the remaining injection wells that would explain the daylighting. • Injection of the 8.4% (by weight) hydrogen peroxide solution resulted in strong subsurface reactions that caused daylighting to occur relatively quickly (less than 40 gal of injection) at INJ-1, INJ-3, and INJ-4. Furthermore, the injection caused the groundwater table to increase within the injection area and side-gradient to it near MW MW-3. The depth-to- water measurements are provided in Table 3.3. o Routine depth-to-water measurements were halted during the 8.4% (by weight) hydrogen peroxide injections to avoid removing the compression well caps for health and safety purposes. Groundwater mounding was measured during all injections, but to a lesser extent when more dilute hydrogen peroxide solutions or dilute sodium permanganate solutions were injected. o There was no notable groundwater mounding measured downgradient of the injection area at MW MW-7. • Reducing the concentration of hydrogen peroxide did not decrease the occurrence of daylighting at injection locations INJ-1, INJ-3, and INJ-4. • Daylighting from the injection wells decreased during sodium permanganate injections, as INJ-3 was the only well associated with daylighting of sodium permanganate. • Daylighting in the saprolite zone was observed at the shallowest injection interval of 17 to 19 ft bgs. Injecting at an offset location was not attempted as the injection tool was damaged and could not be reused, and no other injection tools were on hand. The range of injection pressures and flow rates measured during the ISCO injections are summarized in Table 3.4 (no measurements were collected during the first MFR injection event because flow meters and pressure gauges were not provided by Redox Tech). Since injections used diaphragm pumps and gravity feeding to emplace oxidant solutions into the subsurface, a wide range of injection pressures were measured. Generally, injection flow rates were maintained below 3 gallons per minute (gpm) at both injection wells and DPT injection location DPT-13. Injection pressures were often measured to be 0 lb per square inch (psi) because gravity feeding was used. When the diaphragm pump was used for injections, pressures were generally between 20 and 35 psi. Geochemical parameters were measured directly from MWs within and near the ISCO injection area using a water quality meter, and the results are presented on Table 3.5. Observations from the geochemical parameter monitoring are provided below. • Following MFR injections, elevated DO concentrations were measured within the injection area at MWs MW-57 and MW-58. Two weeks after the second MFR injection (15 September 2021), DO had decreased at MW-57 but remained elevated at MW-58. Increases in DO were not measured at MWs downgradient (MW-2 and MW-7) or side- gradient (MW-3) of the injection area. HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 3-8 • In general, an increase in ORP was measured within the injection area at MWs MW-57 and MW-58 following the first round of MFR injections. A similar increase was also measured at downgradient MW MW-2. o The increase of ORP measured at MW-2 suggests that injections had an impact on groundwater geochemistry immediately downgradient of the injection area, as MW-2 was approximately 8 ft from injection well INJ-4. o All locations exhibited a large decrease in ORP during the last measurement collected on 17 September 2021, after the sodium permanganate injections were completed. It is suspected that the water quality meter malfunctioned based on the previous results and other geochemical readings collected at that time. During the injection event, other methods were used to assess the distribution of oxidant in the subsurface. These methods are discussed below. • Field test kits for hydrogen peroxide were procured and used during the first MFR injection event; however, the field test kit was unable to be used accurately, likely due to interference from compounds naturally present in Site groundwater. During pre-injection testing, the field kit measured elevated concentrations of hydrogen peroxide (up to 30 milligrams per liter [mg/L]). The field kit was tested against store-bought purified water and hydrogen peroxide concentrations were measured to be 0.6 mg/L. Based on these results, the hydrogen peroxide field test kits were not used. • Visual observations were used to assess the presence of sodium permanganate, which is purple. Bailers were placed down well or water color was evaluated during geochemical parameter measurements. No visual evidence of sodium permanganate was observed during the injections. Based on the geochemical parameters measured during injections, it appears as if the target ROI of 6 ft was achieved with the MFR injections. The lack of visual observation of sodium permanganate suggests that the actual ROI for this oxidant was less than 6 ft. 3.1.8 Deviations from the Work Plan During Injection Notable deviations from the Work Plan Addendum (HGL, 2021a) during the ISCO injection pilot test are described below. • Baseline samples were analyzed only for iron and manganese due to an error in the Scribe/chain of custody (CoC). By the time the error was discovered, the samples had been removed by the laboratory for disposal. • Mercury was not included in the target analyte list (TAL) metals analyses due to errors in the Scribe/CoCs. The EPA regional laboratory requires that mercury be explicitly requested as part of TAL metals analysis (i.e., TAL metals plus mercury). By the time the error was discovered, the samples were outside the 28-day hold time. • Prior to drilling, the monitoring and injection well locations were located from Site features using a measuring tape. The final injection locations (Figure 3.1) recorded by a global positioning system were slightly different than the proposed locations in the Work Plan HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 3-9 Addendum (HGL, 2021a). The shift resulted in the four injection wells, MW-2, MW-57, and MW-58 being located approximately 5 to 6 ft north-northwest of the proposed locations in the Work Plan Addendum. This shift did not result in a significant change to how existing Site MWs could be used to monitor the ISCO pilot test. • Due to daylighting, the concentration of hydrogen peroxide was decreased from the design to reduce the reactivity in the subsurface. This change resulted in less total hydrogen peroxide being injected into the PWR zone across two mobilizations than designed. In addition, the iron catalyst for MFR was applied only at INJ-2. • The total volume of injected RemOx-L was less than the design volume based on site conditions, field observations, and subsurface responses. • Due to daylighting, the total oxidant solution volumes injected into the permanent injection wells and temporary DPT injection point were different than designed. Table 3.1 details how much diluted oxidant solution was injected into each injection location. For comparison, Table 3.1 includes the design injection volumes from the Work Plan Addendum (HGL, 2021a). • The injection interval for DPT-13 was adjusted from the planned interval of 15 to 25 ft bgs. No sodium permanganate solution was injected at 23 to 25 ft bgs because flow could not be established, and from 15 to 17 ft bgs due to daylighting. 3.1.9 Performance Monitoring Sampling HGL completed ISCO pilot test performance monitoring by collecting groundwater samples from performance MWs MW-2, MW-6, MW-57, and MW-58 on the dates outlined below. The sampling schedule relative to the timing of the oxidant injections is provided in parenthesis. • 28 July 2021 (Baseline; prior to MFR or permanganate injection); • 14 September 2021 (Week 2: approximately 2 weeks post-MFR injection and before sodium permanganate injection); • 13 and 14 October 2021 (Month 1: approximately 1 month post-sodium permanganate injection); and • 7 December 2021 (Month 3: approximately 3 months post-sodium permanganate injection). Monitoring well sampling was conducted in general accordance with the approved Sampling and Analysis Plan (SAP) (HGL, 2020) and the groundwater samples were analyzed for performance monitoring parameters presented in the ISCO pilot test monitoring plan provided in Table 3.6 and described below. • SVOCs: Naphthalene and other SVOCs were monitored to evaluate the efficacy of ISCO in reducing contaminant concentrations. • Dissolved metals: Dissolved metals were monitored to evaluate potential metals mobilization following ISCO implementation. HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 3-10 • Permanganate: Permanganate was measured using a field test kit to evaluate distribution and permanganate consumption rates. Following the permanganate injections, the field test kits were only used when visual evidence (a purple or pink color in groundwater) was not observed. • Hydrogen peroxide: Hydrogen peroxide was measured using a field test kit to evaluate the concentration of residual hydrogen peroxide in the subsurface. As described in Section 3.1.7, comparison of results for hydrogen peroxide solutions diluted with potable water and Site groundwater indicated that the Site groundwater contained chemicals that interfered with the test kit results. For this reason, hydrogen peroxide was not measured in the field after the first MFR injection. • Iron: Iron was measured using a field test kit during the baseline sampling and the Week 2 sampling following the MFR injections. • Field parameters: General field parameters were collected using a calibrated water quality meter during groundwater sampling to evaluate the geochemical characteristics of the aquifer following the ISCO injections. Groundwater samples were collected using low-flow groundwater sampling techniques and submitted to the EPA Region 4 laboratory under CoC protocol. Field screening was conducted for select compounds (permanganate, hydrogen peroxide, and iron) using field test kits at the frequency indicated in Table 3.6. 3.2 INVESTIGATION-DERIVED WASTE Investigation-derived waste (IDW) generated during the implementation of the ISCO pilot test included soil cuttings from well installation, MW development/purge water, decontamination fluids, personal protective equipment, and empty oxidant containers. IDW generated during field activities (e.g., decontamination water, purge water) was placed in 55-gal drums. For solid IDW, effort was made to reduce that amount of liquid being placed into the solid IDW drums. IDW was managed, characterized, and disposed of in accordance with the approved Waste Management Plan, which was included in the SAP (HGL, 2020). Injection subcontractors (Redox Tech and GEX) managed the empty oxidant containers. HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 4-1 4.0 BASELINE AND PERFORMANCE MONITORING RESULTS This section presents the performance monitoring results for the ISCO pilot test, from baseline monitoring through the Month 3 performance monitoring event (December 2021) at the four performance MWs (MW-2 [downgradient PWR], MW-6 [downgradient saprolite], MW-57 [within treatment zone], and MW-58 [within treatment zone]). Analytical results are provided on Table 4.1 (SVOCs) and Table 4.2 (metals). Laboratory analytical reports are provided in Appendix F. 4.1 FIELD PARAMETERS Field parameters measured during groundwater sampling are presented on Table 4.1. Select field parameters collected during the performance monitoring sampling events were used to evaluate the geochemical characteristics of the aquifers following the ISCO injections. Of particular interest were DO or ORP, which could be impacted by the injection of MFR (DO, ORP) and sodium permanganate (ORP). Results for these parameters are summarized below, by MW. • MW-57 (within treatment zone): DO increased from 0.2 mg/L (baseline) to 17.8 mg/L 2 weeks after MFR injection (September 2021). DO remained elevated 1 month (October 2021) and 3 months (December 2021) after sodium permanganate injections (22.1 mg/L and 6.7 mg/L respectively). ORP increased from a baseline of 85.1 millivolts (mV) to 153.8 mV 2 weeks after MFR injection. ORP increased further 1 month after sodium permanganate injections (811.0 mV) and remained elevated 3 months after sodium permanganate injections (761.1 mV). o These results indicate that MFR and sodium permanganate injections impacted this MW. o DO concentrations measured above saturation in October 2021 indicate that oxygen generated from hydrogen peroxide injection persisted in the subsurface for at least two months. • MW-58 (within treatment zone): DO increased from 0.4 mg/L (baseline) to 17.4 mg/L 2 weeks after MFR injection (September 2021). DO remained elevated 1 month (October 2021) after sodium permanganate injections (7.6 mg/L) and returned to near baseline conditions 3 months after sodium permanganate injections (December 2021). ORP increased from negative 147.3 mV (baseline) to 84.4 mV 2 weeks after MFR injection. ORP continued increasing 1 month and 3 months after sodium permanganate injections (494.1 mV and 637.8 mV, respectively). o These results indicate that MFR and sodium permanganate injections impacted this MW. o DO concentrations measured above saturation in September 2021, but not October 2021, indicate that oxygen generated from hydrogen peroxide injection persisted in the subsurface for at least 4 weeks after MFR injections. • MW-2 (downgradient PWR): DO increased from 1.2 mg/L (baseline) to 4.1 mg/L 2 weeks after MFR injection (September 2021), then returned to near baseline concentrations following sodium permanganate injections. ORP fluctuated between baseline (12.2 mV), HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 4-2 2 weeks following MFR injections (56.6 mV), and 1 month following sodium permanganate injections (3.0 mV). ORP increased by two orders of magnitude 3 months following sodium permanganate injections (806.3 mV). o These results indicate that MFR injections and sodium permanganate injections had some impact on the downgradient area. There was a notable lag in impact following sodium permanganate injections, as ORP increases were not measured during the Month 1 monitoring event. This suggests that sodium permanganate migrated into the vicinity of MW MW-2 area 3 months post-injection. • MW-6 (downgradient saprolite): DO generally remained low during the performance monitoring period; the maximum DO measurement was 1.4 mg/L during the Month 2 performance monitoring event. ORP increased from 39.8 mV (baseline) to 545.0 mV (Month 1) before decreasing back to near baseline conditions (29.0 mV). o These results indicate that MFR injections in the PWR zone may have had a minor impact on the downgradient saprolite zone, as DO did not increase but ORP increased two weeks following MFR injections. o A continued, and more pronounced ORP increase one month following the sodium permanganate indicates that sodium permanganate injections in the saprolite zone may have impacted the downgradient area around MW MW-6. Based on the field parameter results, MFR and sodium permanganate were distributed within and downgradient of the treatment zones. 4.2 SVOCs SVOCs were monitored to evaluate the efficacy of ISCO in reducing contaminant concentrations. Table 4.1 summarizes the SVOC concentrations. The semivolatile groundwater COCs detected during the pilot study are acenaphthene, naphthalene, 1,1-biphenyl, 2-methylnaphthalene, and dibenzofuran. The polynuclear aromatic hydrocarbons (PAHs) that comprise the BaP TEQ were not detected. Graphs presenting a comparison of acenaphthene, naphthalene, 1,1-biphenyl, 2- methylnaphthalene, and dibenzofuran concentrations measured at performance MWs over time, from baseline through Month 3, are provide on Figure 4.1 (MW-57), Figure 4.26 (MW-58), Figure 4.3 (MW-2), and Figure 4.4 (MW-6). In addition, ORP measurements were also depicted in these figures to present SVOC concentration changes with respect to changes in ORP. A summary of results, organized by MW, is provided below. • MW-57 (within the treatment zone): o The naphthalene concentration decreased from 11,000 µg/L during the baseline event to 8,800 µg/L at Week 2 (20% decrease) and 5,800 µg/L at Month 1 (47% decrease), and then rebounded at Month 3 (7,500 µg/L). The lowest detection of 5,800 µg/L during Month 1 coincided with the maximum ORP measurement. o The acenaphthene concentration decreased from 690 µg/L during the baseline event to 510 µg/L after the MFR injection (26% decrease) and then continued to decrease to 27 µg/L during Month 3 (96% decrease). HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 4-3 o Similar to naphthalene, the 2-methylnaphthalene concentration decreased between the baseline event (980 µg/L) and Week 2 (830 µg/L; 15% decrease) and Month 1 (450 µg/L; 54% decrease), and then increased by Month 3 (730 µg/L). o The dibenzofuran concentration decreased from a baseline concentration of 360 µg/L to 320 µg/L at Week 2 (11% decrease) and then to 260 µg/L at Month 1 (28% decrease), then increased slightly to 290 µg/L at Month 3. o The 1,1-biphenyl concentration fluctuated between 130 µg/L and 140 µg/L between the baseline and Month 1 events then increased to 180 µg/L in Month 3. • MW-58 (within the treatment zone): o The naphthalene concentration decreased from a baseline value of 6,600 µg/L to 5,200 µg/L at Week 2 (21% decrease) and 3,000 µg/L at Month 1 (55% decrease), then increased to 7,600 µg/L in Month 3. During the Month 3 sampling event, the ORP was still elevated and sodium permanganate was observed in the purge water. o The acenaphthene concentration decreased from 450 µg/L during the baseline event to 410 µg/L at Week 2 (9% decrease) and 9.5 µg/L at Month 1 (98% decrease), then increased to 460 µg/L during Month 3. o Similar to naphthalene, the 2-methylnaphthalene concentration decreased from a baseline detection of 730 µg/L to 480 µg/L at Week 2 (34% decrease) and 230 µg/L at Month 1 (68% decrease). The concentration increased to 1,000 µg/L during Month 3. o The dibenzofuran concentration decreased slightly (8%) after the baseline event and then increased from 230 µg/L at Week 2 to 380 µg/L at Month 3. o The 1,1-biphenyl concentration decreased from 100 µg/L during the baseline event to 80 µg/L at Week 2 (20% decrease) then increased to 140 µg/L by Month 3. • MW-2 (downgradient of the treatment zone in PWR): o The naphthalene concentration was stable between the baseline (5,100 µg/L) and Week 2 (5,000 µg/L) sampling events. Following sodium permanganate injection, the naphthalene concentration decreased to 2,800 µg/L in Month 1 (45% decrease) and then increased to 3,800 µg/L in Month 3. o The acenaphthene concentration was 470 µg/L during both the baseline and Week 2 sampling events, then increased to 590 µg/L at Month 1. Between Month 1 and Month 3, the acenaphthene concentration decreased to 520 µg/L. o The 2-methylnaphthalene concentration decreased slightly from a baseline value of 810 µg/L to 760 µg/L at Week 2 (6% decrease) then increased to 1,000 µg/L at Month 1 and 1,100 µg/L at Month 3. o Between the baseline event and Week 2, the dibenzofuran concentration decreased slightly from 260 µg/L to 240 µg/L (8% decrease). Between Week 2 and Month 3, the dibenzofuran concentration increased to 290 µg/L. o The 1,1-biphenyl concentration decreased from a baseline detection of 110 µg/L to 84 µg/L at Week 2 (24% decrease), then increased to 120 µg/L at Month 3. HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 4-4 • MW-6 (downgradient of the treatment zone in saprolite): o The naphthalene concentration decreased slightly from the baseline event (14,000 µg/L) to Week 2 (13,000 µg/L; 7% decrease), and then decreased further to 9,200 µg/L at Month 1 (34% decrease) following the injection of sodium permanganate. By Month 3, the naphthalene concentration had rebounded to its baseline level (14,000 µg/L). The maximum ORP of 545 mV for MW-6 was reported during the Month 1 sampling event. o The acenaphthene concentration increased from 670 µg/L during the baseline event to 710 µg/L at Week 2, then decreased to 130 µg/L during Month 1 (82% decrease from the Week 2 concentration). Between Month 1 and Month 3, the acenaphthene concentration increased to 210 µg/L. o Similar to acenaphthene, the 2-methylnaphthalene concentration increased slightly between the baseline event (1,000 µg/L) and Week 2 (1,100 µg/L). Between the Week 2 and Month 1 sampling events, the 2-methylnaphthalene concentration decreased to 580 µg/L; 47% decrease). The concentration then increased to 800 µg/L in Month 3. o The dibenzofuran concentration increased slightly from a baseline value of 350 µg/L to 370 µg/L during the Week 2 sampling event, then decreased by 41% to a concentration of 220 µg/L during the Month 1 sampling event. Between Month 1 and Month 3, the dibenzofuran concentration increased slightly to 240 µg/L. o The 1,1-biphenyl concentration was 140 µg/L during the baseline event and 150 µg/L during the Week 2 sampling event. The results for the Month 1 and Month 3 sampling events were 120 µg/L and 110 µg/L, respectively. The latter result is 21% lower than the baseline concentration. It is possible that some of the slight concentration changes noted above were due to natural variability instead of the pilot study. In addition, the volume of oxidant solution could have diluted the SVOC concentrations. The Work Plan Addendum for this pilot study (HGL, 2021a) estimated the total pore volume of the PWR treatment zone to be 7,107 gal. Between the two MFR injection events, a total volume of 1,064 gal was injected. This injection volume represents 15% of the pore volume. The total volume of sodium permanganate solution, 1,669 gal, is 24% of the treatment zone pore volume. Figure 4.5 compares the percent concentration decreases observed in MW-57 and MW-58 between the baseline and Week 2 sampling events to the estimated MFR pore volume displacement of 15%. Percent concentration decreases at or less than 15% may be solely due to dilution; percent concentration decreases greater than 15% are likely due to a combination of dilution and degradation. As shown in Figure 4.5, it is likely that the MFR treatment resulted in some degradation of naphthalene at both wells, acenaphthene at MW-57, and 2-methylnaphthalene and 1,1-biphenyl at MW-58. Figure 4.6 compares the percent concentration decreases observed at MW-57 and MW-58 between the Week 2 and Month 1 sampling events to the pore volume displacement of 24% associated with the sodium permanganate injection. Percent concentration decreases less than 24% might be due to dilution instead of actual degradation. Percent concentration decreases greater than 24% are likely due to degradation in addition to dilution. As shown in Figure 4.6, naphthalene, acenaphthene, and 2-methylnaphthalene concentrations at both wells in the treatment zone HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 4-5 decreased by more than 24%, indicating that these compounds were degraded in addition to diluted. The decrease in dibenzofuran concentration at MW-57 could have been solely due to dilution. As noted in Section 2.2, the bench-scale study results indicated that sodium permanganate could effectively degrade the low molecular weight PAHs (naphthalene, 2-methylnaphthalene, acenaphthene) but was less effective in treating 1,1-biphenyl and dibenzofuran. Conversely, MFR could effectively degrade the latter two SVOCs but was not effective in treating the low molecular weight PAHs. The limited degradation of 1,1-biphenyl and dibenzofuran observed during the pilot study is likely due to the inability to inject the design quantity of hydrogen peroxide. The data indicate that MFR degraded some of the low molecular weight PAHs. It is not known whether degradation by MFR occurred through oxidation or aerobic biodegradation from the oxygen released by the hydrogen peroxide. The sodium permanganate solution degraded the low molecular weight PAHs. The contaminant rebound that occurred between Month 1 and Month 3 suggests that sodium permanganate was largely consumed within a month or two after injection. At downgradient well MW-2, naphthalene was the only SVOC to show a substantial decrease in concentration. Better treatment was observed at MW-6, where the naphthalene, acenaphthene, 2- methylnaphthalene, and dibenzofuran concentrations substantially decreased between the baseline event and Month 1 before rebounding in Month 3. The decrease in dibenzofuran concentration suggests some downgradient effects of treatment by MFR. All 1,1-biphenyl and acenaphthene results were less than the cleanup levels, while all naphthalene, dibenzofuran, and 2-methylnaphthalene results were greater than the cleanup levels. Although the pilot study decreased concentrations of the latter three compounds, there was not enough degradation to meet the cleanup levels. 4.3 METALS Metals may be temporarily mobilized in the aquifer following the ISCO injections due to the oxidant’s composition and changes in groundwater geochemistry. This section discusses results of dissolved and total metals analyses. Due to a Scribe/CoC error, baseline monitoring data are available for only iron and manganese; therefore, changes in other metals can only be evaluated following MFR injections. Changes in manganese concentrations can be used qualitatively to assess the presence of sodium permanganate. At MWs MW-57 and MW-58, manganese concentrations increased by multiple orders of magnitude between Week 2 and Month 1 performance monitoring events. Concentrations of dissolved manganese then decreased between the Month 1 and Month 3 performance monitoring events, indicating that dissolved manganese mostly precipitated at Month 3. The manganese concentration at downgradient well MW-6 also increased between Week 2 and Month 1, then decreased between Month 1 and Month 3. At well MW-2, the greatest increase in manganese concentration occurred between Months 1 and 3, suggesting that sodium permanganate influenced this downgradient area between 1 month and 3 months post-injection. Dissolved iron concentrations at each MW were greater than 1,000 µg/L during baseline sampling. At all MWs, dissolved iron concentrations decreased to non-detectable levels by Month 1 (MW-57, HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 4-6 MW-58, and MW-6) or Month 3 (MW-2). Between Month 1 and Month 3, there was some rebound towards the baseline concentration measured at MW MW-6. Many of the metals were not detected in the groundwater samples or did not show appreciable changes in concentration. The bullets below discuss the metals that exhibited substantial concentration changes between the Week 2 and Month 3 performance monitoring events. • Barium: At MW-57, the dissolved barium concentration increased from 61 µg/L during the Week 2 monitoring event to 510 µg/L during the Month 1 monitoring event, while the concentration at MW-58 increased from 100 µg/L to 1,300 µg/L. By Month 3, the barium concentration at both wells had decreased to less than the initial detections. In the downgradient wells, barium concentrations appeared to have been unaffected by the permanganate injection. • Calcium: Calcium concentrations at MW-57 and MW-58 increased by more than an order of magnitude from less than 10,000 µg/L before sodium permanganate injection to 160,000 µg/L one month after sodium permanganate injection. By Month 3, calcium concentrations had decreased to 82,000 µg/L at MW-57 and 6,800 µg/L at MW-58. At MW MW-2, the calcium concentration increased from 6,300 µg/L during Month 1 to 31,000 µg/L during Month 3 after being stable between Week 2 and Month 1. At MW MW-6, the calcium concentration appeared to be stable. • Chromium: Chromium concentrations increased at each MW following sodium permanganate injection. Concentrations increased from non-detect to greater than 100 µg/L at MWs MW-57 and MW-58 (160 µg/L and 390 µg/L, respectively) and greater than or equal to 10 µg/L at MW-2 and MW-6 (10 µg/L and 62 µg/L, respectively). At Month 3, the dissolved chromium concentration at MW-57 (150 µg/L) remained elevated while the dissolved chromium concentrations at MW-58 (8.9 µg/L) and MW-6 (46 µg/L) had decreased. Because the samples were not analyzed for hexavalent chromium, it is not known how much of the increases in chromium concentrations were due to generation of hexavalent chromium. • Lead: Within the treatment zone, the lead concentration increased from non-detectable levels at MW-57 and MW-58 to 34 µg/L and 78 µg/L, respectively, during the Month 1 monitoring event. This concentration increase was temporary. By Month 3, the lead concentration had decreased to non-detectable levels at both wells, with reporting limits of 12 µg/L for MW-57 and 16 µg/L for MW-58. Lead was not detected in the filtered samples from the downgradient wells, suggesting that the temporary increase in lead concentration within the treatment zone did not migrate downgradient. • Magnesium: Magnesium concentrations increased by one order of magnitude at MWs MW-57 and MW-58 following sodium permanganate injections. Concentrations increased at MW-57 from 1,400 µg/L to 40,000 µg/L and at MW-58 from 2,400 µg/L to 39,000 µg/L. Concentrations remained elevated through Month 3 at MW MW-57 (23,000 µg/L) but decreased at MW MW-58 (1,700 µg/L). • At MW MW-2, the magnesium concentration increased from Month 1 to Month 3 (1,700 µg/L to 9,400 µg/L) after being stable between Week 2 and Month 1. The magnesium concentration at MW MW-6 did not appear to have been affected by the oxidant injections. HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 4-7 • Nickel: At both MW-57 and MW-58, nickel was not detected in the Week 2 monitoring event and Month 3 monitoring event samples. During the Month 1 sampling event, the dissolved nickel concentrations were 34 µg/L in MW-57 and 81 µg/L in MW-58, suggesting temporary dissolution of this metal. In the downgradient wells, nickel was not detected until Month 3. At that time, the dissolved nickel concentration was 5.1 µg/L at MW-2 and 90 µg/L at MW-6. Because the reporting limit for the non-detect results was 40 µg/L, it is not known if the Month 3 detection for MW-2 represented an increase in nickel concentration. The detection for MW-6 indicates downgradient migration of nickel from the treatment zone. • Selenium: Although the detections were not confirmed by the analytical method, the Month 1 selenium results suggest a temporary spike in dissolved selenium concentration within the treatment zone following the sodium permanganate injection. • Silver: The dissolved silver concentration within the treatment zone increased from non- detectable levels during the Week 2 monitoring event to 83 µg/L in MW-57 and 200 µg/L in MW-58 during the Month 1 monitoring event, then decreased to non-detectable levels during the Month 3 event. Silver concentrations for MW-2 and MW-6 did not appear to have been affected by the permanganate injection. • Thallium: Similar to selenium, the data suggest that the dissolved thallium concentration within the treatment zone spiked one month after the sodium permanganate injection and then decreased. Because the detections were not confirmed by the analytical method, there is uncertainty in these results. • Sodium: Sodium permanganate injection increased the sodium concentrations at all four MWs. At MW-2, the change in sodium concentration was not apparent until Month 3. For all four wells, the Week 2 sodium results ranged from approximately 7,000 µg/L to 8,000 µg/L. At MW MW-57, the sodium concentration increased to 100,000 µg/L during Month 1 and remained elevated through Month 3 (130,000 µg/L). At MW MW-58, the sodium concentration increased to 380,000 µg/L Month 1 and then decreased to 17,000 µg/L during Month 3. At MW MW-2, the sodium concentration increased to 19,000 µg/L during Month 3. At MW MW-6, the sodium concentration increased to 92,000 µg/L during Month 1 and then decreased to 27,000 µg/L during Month 3. The data indicate that cobalt, which is a groundwater COC, was not affected by the oxidant injections. In summary, injection of sodium permanganate caused a temporary increase in the dissolved concentrations of multiple metals. 4.4 PERMANGANATE, HYDROGEN PEROXIDE, AND IRON FIELD TESTS The results from field tests are provided in Table 4.1. Hydrogen peroxide field tests were not used during the majority of the performance monitoring due to interference from compounds naturally present in Site groundwater, as discussed in Section 3.2.8. Iron field tests were used during only the baseline and Week 2 performance monitoring events per the Work Plan Addendum (HGL, 2021a). The purpose of this testing was to evaluate the presence of the iron catalyst associated with MFR. Decreases in iron concentrations were measured at MWs HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 4-8 MW-58, MW-2, and MW-6. The iron concentration increased from 0.9 mg/L to 5.7 mg/L at MW MW-57. Permanganate field tests were utilized intermittently during the monitoring period. Following sodium permanganate injections, visual observations were the primary means of evaluating whether permanganate was still present in groundwater or whether the oxidant had been consumed. During the Month 3 performance monitoring event, there was visual evidence of permanganate (a purple or pink color in groundwater) in MWs MW-57, 58, and MW-2. A measurement was made at MW-6 during Month 3, and the result was 0.4 mg/L of permanganate. Based on descriptions provided during Month 1 performance monitoring, permanganate concentrations decreased between Month 1 and 3 performance monitoring events (color descriptions during Month 3 were more often described as “light”). HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 5-1 5.0 CONCLUSIONS AND RECOMMENDATIONS This section provides conclusions and recommendations from the implementation of the ISCO pilot test completed at the Site. The following subsections are organized in accordance with the objectives described in Section 2.0. 5.1 INJECTION PROCESS AND PARAMETERS Based on the ISCO injection execution, sequential injection of MFR and sodium permanganate is not appropriate at the Site. It was observed that MFR injections were generally prone to daylighting regardless of injection rate, and intense reactions occurred in the subsurface when the design dosage was injected, making it difficult or not possible to inject the required oxidant dosing at the Site. Permanganate was injected with limited daylighting using low-pressure injection techniques. It appears that low-pressure injection via DPT or injection wells is an appropriate method for distributing a permanganate solution in the subsurface. Injection pressures were generally less than 30 psi and injection rates ranged from less than 1 to 3 gpm. Visual observation and geochemical evidence indicated that an ROI of at least 6 ft can be achieved in the PWR and saprolite zones at the design volume. 5.2 GROUNDWATER CHEMISTRY Performance monitoring during the two weeks following the injection of MFR and three months following the injection of sodium permanganate indicated the following regarding the effect of the oxidants on the groundwater chemistry, primarily changes in DO and ORP: • DO generally increased within the treatment zone following MFR injections and was measured at concentrations greater than saturation levels during the Week 2 performance monitoring event (MW-57 and MW-58) and Month 1 performance monitoring event (MW- 57). DO increased, but to a lesser extent, at the downgradient PWR MW (MW-2) during the Week 2 performance monitoring event. DO did not increase at the downgradient saprolite MW (MW-6), which is expected as MFR was not injected directly into the saprolite zone. • ORP generally increased from baseline to Month 3 at performance MWs MW-57, MW- 58, and MW-2. At MW MW-6, ORP increased from baseline through Month 1, then decreased to near baseline conditions during Month 3. At all MW locations, ORP increases were greatest following sodium permanganate injections. 5.3 CONTAMINANT REDUCTION EFFICACY Performance monitoring during the three months following the ISCO injections indicated the following regarding the ability of MFR and sodium permanganate to reduce target SVOC concentrations: • Within the treatment area (MW-57 and MW-58), the MFR injection appeared to have degraded naphthalene at both wells, acenaphthene at MW-57, and 2-methylnaphthalene and 1,1-biphenyl at MW-58. The sodium permanganate injection degraded low molecular HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 5-2 weight PAHs (naphthalene, acenaphthene, and 2-methylnaphthalene) at both wells. SVOC concentrations, however, did not decrease to less than the cleanup values. • Both downgradient MWs (MW-2 in the PWR and MW-6 in the saprolite) were influenced by the ISCO injections. At well MW-2, naphthalene was the only SVOC to show a substantial decrease in concentration. Better treatment was observed at MW-6, where the naphthalene, acenaphthene, 2-methylnaphthalene, and dibenzofuran concentrations substantially decreased between the baseline event and Month 1 before rebounding in Month 3. The decrease in dibenzofuran concentration suggests some downgradient effects of treatment by MFR. The limited degradation that occurred after the MFR injection was likely due to the inability to inject the design quantity of hydrogen peroxide. Sodium permanganate was able to reduce the concentration of multiple target SVOCs (naphthalene, acenaphthene, and 2-methylnaphthalene), but was not effective at treating other target SVOCs (1,1-biphenyl and dibenzofuran). Multiple permanganate injections would likely be required to reduce contaminant concentrations below Site cleanup target levels, and even then this oxidant might not degrade all of the semivolatile COCs. Sodium permanganate increased the dissolved concentrations of multiple metals within the treatment zone, and some of these elevated metal concentrations migrated to the downgradient wells. The Month 3 data suggest that the increases in metal concentrations are temporary and that concentrations will return to baseline levels with time. 5.4 RECOMMENDATIONS Based on the results presented in Section 4 and the conclusions present above, the following recommendations and observations should be considered in developing a remedial strategy for the Site. • MFR does not appear to be a viable oxidation technology for the Site because of the challenges delivering the design dose of the oxidant, • Permanganate is a viable oxidant for the Site. During the pilot test, sodium permanganate was successful at treating naphthalene, acenaphthene, and 2-methylnaphthalene, but not 1,1-biphenyl and dibenzofuran. If ISCO with sodium permanganate injection is selected as a remedial technology for the Site, it should be paired with another remedial technology, such as aerobic bioremediation, to treat all of the target SVOCs. HGL evaluated the effectiveness of the aerobic bioremediation technology with a pilot test in the saprolite zone (HGL, 2021b). • Injection activities can achieve an ROI of at least 6 ft, and the Site’s groundwater flow can aid in the distribution of oxidant to enhance downgradient distribution. • Multiple rounds of sodium permanganate injection would likely be required to reduce concentrations of the target SVOCs below their cleanup levels. The injection frequency should be selected based on field measurement of residual permanganate levels in the MWs. The rebound in SVOC concentrations observed during the Month 3 monitoring event indicates that the oxidant dose administered was consumed within 3 months. HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 5-3 • Permanganate injection temporarily increases the dissolved concentrations of multiple metals. If this technology is implemented full-scale, the performance monitoring program would need to include TAL metals analysis to track changes in dissolved metals concentrations. HGL, ISCO Pilot Test Report, Holcomb Creosote Company Site, Yadkinville, NC U.S. EPA Region 4 6-1 6.0 REFERENCES HydroGeoLogic, Inc. (HGL), 2020. Final Sampling and Analysis Plan; Volume 1: Field Sampling Plan and Volume 2 Uniform Federal Policy Quality Assurance Project Plan; Holcomb Creosote Company Site. January. HGL, 2021a. Addendum to the Final Work Plan - In Situ Chemical Oxidation Treatability Study and In Situ Enhanced Bioremediation Pilot Test; Holcomb Creosote Company Site. July HGL, 2021b. In Situ Enhanced Bioremediation Pilot Test Report; Holcomb Creosote Company Site. August EPA, 2018. Record of Decision, Holcomb Creosote Company Superfund Site, Yadkinville, Yadkin County, North Carolina. U.S. Environmental Protection Agency. August. Versar, 2017a. Final Remedial Investigation Report, Holcomb Creosote Company Superfund Site, Yadkinville, Yadkin County, North Carolina. May. Versar, 2017b. Final Feasibility Study Report (Rev 1), Holcomb Creosote Company Superfund Site, Yadkinville, Yadkin County, North Carolina. December. TABLES Table 3.1Injection Volume SummaryIn Situ Chemical Oxidation Pilot Test ReportHolcomb Creosote Company Site, Yadkinville, Yadkin County, North CarolinaInjection LocationInjection Interval (ft bgs) 1Oxidant Design Volume (gal)Oxidant Design ConcentrationCatalyst Design Volume (gal)Date of Injection Injection Solution2Solution Volume Injected (gal)Total Cumulative Volume (gal)Oxidant Cumulative Volume (gal)08/18/21H2O2 (8.4% dose)25.0 25.0MFR/Catalyst Solution08/19/21H2O2 (4.2% dose)40.0 65.009/02/21H2O2 (0.5% dose)50.0 115.009/15/21NaMnO4 (8.6%)246.1 361.1NaMnO4 Solution09/17/21NaMnO4 (8.6%)293.9 655.0540.0Water315.0 15.0MFR/Catalyst SolutionH2O2 (8.4% dose)148.0 163.0Water20.0 183.0H2O2 (4.2%)90.0 273.0Water10.0 283.0Catalyst119.0 402.0H2O2 (4.2%)25.0 427.0Water10.0 437.009/02/21H2O2 (0.5%)346.4 783.4NaMnO4 Solution540 8.6 NA 09/16/21NaMnO4 (8.6%)540.0 1323.4540.008/18/21H2O2 (8.4% dose)25.0 25.0MFR/Catalyst Solution08/19/21H2O2 (4.2% dose)10.0 35.072.5 / 009/02/21H2O2 (0.5% dose)37.5 72.5NaMnO4 Solution540 8.6 NA 09/15/21NaMnO4 (8.6%)109.6 182.1109.608/18/21H2O2 (8.4% dose)40.0 40.0MFR/Catalyst Solution08/19/21H2O2 (4.2% dose)15.0 55.009/02/21H2O2 (0.5% dose)37.6 92.609/15/21NaMnO4 (8.6%)162.2 254.8NaMnO4 Solution09/17/21NaMnO4 (8.6%)336.9 591.7 499.123 to 250.0NaMnO4 Solution21 to 23131.019 to 21131.009/16/2133.233.209/17/2156.389.5Notes:1All injection intervals are presented in ft bgs.% = weight percentage H2O2 = hydrogen peroxide2 Injection solution is presented in the order of injection at each location.DPT = direct push technology MFR = modified Fenton's reagent 3 Water injected at first location to help establish flow in the subsurface.ft bgs = feet below ground surface. NA = not applicablegal = gallons NaMnO4 = sodium permanganate655 12.6 NA5408.4 1198.6 NA238119NA119238 8.4 1192385408.48.6238 8.408/18/2108/19/2109/16/21351.5Injection WellsTemporary Injection LocationDPT 13INJ-1 23 to 33INJ-2 23 to 3317 to 19INJ-4 23 to 33INJ-3 23 to 33NaMnO4 (12.6%)NaMnO4 (12.6%)262.0115.0 / 092.6 / 0783.4 / 119.0Page 1 of 1 Table 3.2Daylighting Summary In Situ Chemical Oxidation Pilot Test ReportHolcomb Creosote Company Site, Yadkinville, Yadkin County, North CarolinaInjection LocationInjection Interval (ft bgs) Date of Injection1Injection Solution2Volume Injected (gal)Daylighting (Y/N)Cumulative Volume Injected(gal)08/18/21H2O2 (8.4% dose)25.0 Y 25.008/19/21H2O2 (4.2% dose)10.0 Y 35.008/19/21H2O2 (4.2% dose)30.0 N 65.009/02/21H2O2 (0.5% dose)12.5 Y 77.509/02/21H2O2 (0.5% dose)37.5 Y 115.009/15/21NaMnO4 (8.6%)246.1 N 361.109/17/21NaMnO4 (8.6%)293.9 N 655.008/18/21H2O2 (8.4% dose) / Water / Catalyst183.0 N 183.008/19/21H2O2 (4.2% dose) / Water / Catalyst254.0 N 437.009/02/21H2O2 (0.5% dose)346.4 N 783.409/16/21NaMnO4 (8.6%)540.0 N 1323.408/18/21H2O2 (8.4% dose)25.0 Y 25.008/19/21H2O2 (4.2% dose)10.0 Y 35.009/02/21H2O2 (0.5% dose)46.5 Y 71.509/15/21NaMnO4 (8.6%)109.6 Y 144.608/18/21H2O2 (8.4% dose)40.0 Y 40.008/19/21H2O2 (4.2% dose)45.0 Y 85.009/02/21H2O2 (0.5% dose)4.2 Y 89.209/15/21NaMnO4 (8.6%)162.2 N 247.209/17/21NaMnO4 (8.6%)336.9 N 584.123 to 25 0.0 N21 to 23 131.0 N19 to 21 131.0 N09/16/21 33.2 Y 33.209/17/21 26.6 Y 59.8Notes:1 Date of injection indicates the date injections occurred at each location. If multiple entries % = weight percentageH2O2 = hydrogen peroxide are presented for a single date, then we observed multiple instances of daylighting at that location.ft bgs = feet below ground surfaceNaMnO4 = sodium permanganate2 Injection solution is presented in the order of injection at each location.gal = gallons Y/N = Yes/NoInjection Wells23 to 3323 to 3323 to 3323 to 33262.0INJ-1INJ-209/16/21DPT - 1317 to 19INJ-3INJ-4NaMnO4 (12.6%)Temporary Injection LocationsPage 1 of 1 Table 3.3 Depth-to-Water During ISCO Injections In Situ Chemical Oxidation Pilot Test Report Holcomb Creosote Company Site, Yadkinville, Yadkin County, North Carolina Monitoring Well Date Time Active Injection Location1 Depth-to-Water (ft BTOC) MW-58 9:09 6.10 MW-57 9:12 6.30 MW-2 9:14 4.43 MW-3 9:17 < 1 MW-58 11:45 2.80 MW-57 11:45 4.34 MW-2 11:45 4.47 MW-58 7:53 6.32 MW-57 7:56 6.62 MW-2 7:57 3.44 MW-3 8:00 0.82 MW-58 8:50 4.26 MW-57 8:52 5.94 MW-2 8:54 4.61 MW-58 9:20 3.93 MW-57 9:21 5.18 MW-2 9:22 4.15 MW-58 9:59 4.26 MW-57 10:00 5.15 MW-2 10:01 3.78 MW-58 11:13 4.13 MW-57 11:12 5.03 MW-2 11:11 3.65 MW-58 11:45 INJ-4 5.48 MW-58 13:11 6.03 MW-57 13:10 6.33 MW-2 13:08 4.30 MW-58 13:20 6.41 MW-57 13:21 6.41 MW-2 13:22 4.46 MW-58 15:02 5.80 MW-57 15:01 6.01 MW-2 14:58 3.91 MW-3 15:09 < 0.5 MW-58 7:39 6.36 MW-57 7:40 6.72 MW-2 7:42 4.70 MW-3 7:43 0.79 MW-7 7:48 2.23 MW-58 9:48 5.75 MW-57 9:49 5.62 MW-2 9:50 4.40 MW-7 9:52 2.06 MW-3 9:53 < 0.5 None (Pre-Injection) None (Post-injection) None (Post-injection) None (Pre-Injection) INJ-2 08/18/21 08/19/21 08/18/21 08/19/21 08/19/21 08/19/21 08/19/21 08/19/21 08/19/21 08/19/21 09/02/21 INJ-2 INJ-2 INJ-2 INJ-2 09/02/21 None INJ-3 INJ-1 & 3 Page 1 of 5 Table 3.3 (Continued) Depth-to-Water During ISCO Injections In Situ Chemical Oxidation Pilot Test Report Holcomb Creosote Company Site, Yadkinville, Yadkin County, North Carolina Monitoring Well Date Time Active Injection Location1 Depth-to-Water (ft BTOC) MW-58 11:17 5.93 MW-57 11:18 5.65 MW-2 11:18 4.16 MW-7 11:19 2.01 MW-3 11:20 < 0.5 MW-58 12:49 4.88 MW-57 12:50 5.76 MW-2 12:57 4.14 MW-7 12:52 2.07 MW-3 12:52 < 0.5 MW-58 14:26 3.80 MW-57 14:28 4.89 MW-2 14:29 3.31 MW-7 14:30 1.95 MW-3 14:31 < 0.5 MW-58 15:45 4.96 MW-57 15:46 5.40 MW-2 15:48 3.96 MW-7 15:49 2.02 MW-3 16:50 < 0.5 MW-6 16:40 4.12 MW-58 8:43 6.71 MW-57 8:44 6.96 MW-2 9:15 5.17 MW-6 9:16 5.04 MW-7 9:17 2.38 MW-58 12:22 5.60 MW-57 12:21 5.79 MW-2 12:20 5.06 MW-6 12:19 4.64 MW-7 12:23 2.41 MW-58 13:25 4.36 MW-57 13:26 4.59 MW-2 13:26 4.17 MW-6 13:26 3.63 MW-7 13:27 2.34 MW-58 14:22 4.42 MW-57 14:23 5.34 MW-2 14:24 3.91 MW-6 14:25 3.79 MW-7 14:26 2.26 MW-58 15:44 5.34 MW-57 15:45 5.72 MW-2 15:46 3.66 MW-6 15:47 3.83 MW-7 15:48 2.24 None (Post-injection) None (Pre-Injection) 09/15/21 09/15/21 INJ-1 None 09/15/21 09/15/21 09/15/21 INJ-1 &3 INJ-1 &3 09/02/21 09/02/21 09/02/21 09/02/21 INJ-4 INJ-2 INJ-2 Page 2 of 5 Table 3.3 (Continued) Depth-to-Water During ISCO Injections In Situ Chemical Oxidation Pilot Test Report Holcomb Creosote Company Site, Yadkinville, Yadkin County, North Carolina Monitoring Well Date Time Active Injection Location1 Depth-to-Water (ft BTOC) MW-58 17:40 6.27 MW-57 17:41 6.75 MW-2 17:42 4.65 MW-6 17:44 6.41 MW-7 17:45 2.35 MW-58 7:26 6.69 MW-57 7:27 6.94 MW-2 7:28 5.15 MW-6 7:29 5.01 MW-7 7:30 2.42 MW-58 8:54 6.45 MW-57 8:55 6.88 MW-2 8:56 5.11 MW-6 8:57 4.91 MW-7 8:58 2.41 MW-58 9:17 5.02 MW-57 9:18 6.14 MW-2 9:19 4.91 MW-6 9:19 4.42 MW-7 9:20 2.4 MW-58 10:33 4.80 MW-57 10:34 5.25 MW-2 10:35 4.21 MW-6 10:36 3.64 MW-7 10:37 2.32 MW-58 12:23 5.62 MW-57 12:24 5.54 MW-2 12:24 3.77 MW-6 12:25 3.78 MW-7 12:26 2.19 MW-58 14:14 6.21 MW-57 14:14 6.36 MW-2 14:15 4.51 MW-6 14:14 3.76 MW-7 14:16 2.99 MW-58 15:39 5.95 MW-57 15:40 6.12 MW-2 15:41 4.17 MW-6 15:38 3.51 MW-7 15:42 2.26 MW-58 16:23 5.88 MW-57 16:23 5.94 MW-2 16:24 4.07 MW-6 16:22 3.10 MW-7 16:25 2.24 09/16/21 09/16/21 INJ-2 INJ-2 None (Pre-Injection) 09/15/21 09/16/21 None (Post-injection) 09/16/21 09/16/21 09/16/21 09/16/21 09/16/21 INJ-2 INJ-2 DPT - 13 DPT - 13 DPT - 13 Page 3 of 5 Table 3.3 (Continued) Depth-to-Water During ISCO Injections In Situ Chemical Oxidation Pilot Test Report Holcomb Creosote Company Site, Yadkinville, Yadkin County, North Carolina Monitoring Well Date Time Active Injection Location1 Depth-to-Water (ft BTOC) MW-58 17:04 5.58 MW-57 17:05 5.65 MW-2 17:06 3.78 MW-6 17:02 2.44 MW-7 17:07 2.22 MW-58 17:29 5.77 MW-57 17:30 6.10 MW-2 17:31 3.95 MW-6 17:27 3.92 MW-7 17:32 2.21 MW-58 7:07 6.65 MW-57 7:08 6.90 MW-2 7:09 5.02 MW-6 7:10 4.92 MW-7 7:11 2.38 MW-58 8:20 6.47 MW-57 8:21 6.74 MW-2 8:22 4.85 MW-6 8:17 4.60 MW-7 8:24 2.37 MW-58 9:03 4.09 MW-57 9:04 4.88 MW-2 9:05 4.42 MW-6 9:07 4.06 MW-7 9:09 2.35 MW-58 9:48 4.36 MW-57 9:49 4.75 MW-2 9:50 3.82 MW-6 9:51 3.76 MW-7 9:53 2.29 MW-58 10:43 4.29 MW-57 10:44 4.57 MW-2 10:45 3.61 MW-6 10:46 3.66 MW-7 10:47 2.24 MW-58 12:16 5.36 MW-57 12:17 5.26 MW-2 12:18 4.25 MW-6 12:19 4.24 MW-7 12:20 2.27 MW-58 13:04 5.69 MW-57 13:05 4.72 MW-2 13:06 3.74 MW-6 13:07 3.79 MW-7 13:08 2.25 09/17/21 09/17/21 09/17/21 09/16/21 09/17/21 09/17/21 09/17/21 09/17/21 09/16/21 INJ-1, INJ-4 INJ-1, INJ-4 INJ-1, INJ-4 INJ-1, INJ-4 INJ-1, INJ-4 DPT - 13 DPT - 13 (17 to 19) None (Pre-Injection) None (Post-injection) Page 4 of 5 Table 3.3 (Continued) Depth-to-Water During ISCO Injections In Situ Chemical Oxidation Pilot Test Report Holcomb Creosote Company Site, Yadkinville, Yadkin County, North Carolina Monitoring Well Date Time Active Injection Location1 Depth-to-Water (ft BTOC) MW-58 13:53 4.39 MW-57 13:54 4.44 MW-2 13:55 3.44 MW-6 13:56 3.55 MW-7 13:57 2.21 MW-58 14:51 5.36 MW-57 14:52 4.66 MW-2 14:53 3.50 MW-6 14:54 3.72 MW-7 14:55 2.21 MW-58 15:41 4.92 MW-57 15:42 5.38 MW-2 15:43 3.49 MW-6 15:44 3.81 MW-7 15:55 2.21 Notes: 1 Active Injection Location indicates which injection location(s) was/were active during depth-to-water measurement. < = less than presented value DPT = direct push technology ft BTOC = feet below top of casing ISCO = in situ chemical oxidation 09/17/21 09/17/21 INJ-1, INJ-4 INJ-1, INJ-4 None (Post-injection) 09/17/21 Page 5 of 5 Table 3.4Injection Pressures and Flow Rates Summary In Situ Chemical Oxidation Pilot Test Report Holcomb Creosote Company Site, Yadkinville, Yadkin County, North CarolinaMinimum Maximum Minimum MaximumINJ-1H2O20.0 0.0 0.5 1.7INJ-2H2O2 / Water20.0 25.0 2.0 3.0INJ-3H2O20.0 0.0 1.0 1.3INJ-4H2O20.0 0.0 0.6 2.0INJ-1 1.6 4.0 0.6 1.3INJ-3 0.0 2.1 0.8 3.0INJ-4 0.0 2.6 0.8 1.309/16/21 INJ-2 23 - 33NaMnO411.9 20.7 1.1 3.1INJ-1 0.0 5.5 0.0 2.4INJ-4 0.0 5.6 0.0 1.823-25 35.0 35.0 0.0 0.021-23 34.2 36.4 1.0 1.319-21 23.2 36.8 1.8 3.109/16/2109/17/21Notes:ft bgs = feet below ground surfaceDPT = direct push technologygpm = gallons per minuteH2O2 = hydrogen peroxideNaMnO4 = sodium permanganatepsi = pounds per square inch1Ranges of injection pressures and flow rates were not measured during the first modified Fenton's reagent (MFR) injections in August 2021 because the monitoring equipment (flow meter and pressure gauge) were not provided by the injection subcontractor. Metering equipment was provided during the second injections.Temporary Injection Locations17-1909/16/21 DPT-131.0 2.509/02/2109/15/21NaMnO409/17/2116.1DPT-13NaMnO4NaMnO43.623 - 3323 - 3323 - 33NaMnO4Injection WellsInjection LocationInjection Pressure (psi) Flow Rate (gpm)Date1Injection SolutionInjection Interval (ft bgs)Page 1 of 1 Table 3.5Geochemical Parameters During ISCO Injections In Situ Chemical Oxidation Pilot Test ReportHolcomb Creosote Company Site, Yadkinville, Yadkin County, North CarolinaMonitoring Well Monitoring Event Injection MaterialDate TimepH(S.U.)DO(mg/L)ORP(mV)Specific Conductivity(μS/cm)Temperature(°C)Baseline 10:30 5.10 0.33 -86.7 104.0 18.27INJ-2 Active 12:08 5.63 0.50 -145.4 100.0 18.2308:13 4.98 41.34 -21.9 98.0 15.6315:22 14.94+ 37.56 53.9 95.0 18.37Pre-Injection 08:05 6.15 7.26 153.2 74.0 18.02Post-Injection 16:05 6.05 8.40 75.4 72.0 19.07Pre-Injection 09:00 5.93 0.21 94.4 62.0 18.20Post-Injection 17:51 5.79 0.32 103.4 60.0 19.46Pre-Injection 07:43 5.55 0.30 124.4 64.0 18.58Post-Injection 17:46 5.79 0.33 111.5 62.0 18.65Pre-Injection 07:24 5.90 5.61 149.9 61.0 18.45Post-Injection++ 16:07 11.10 0.42 -278.7 64.0 19.38BaselineH2O208/18/21 10:15 5.83 1.14 -78.8 150.0 19.25Pre-Injection 08:06 5.29 41.77 -12.9 126.0 15.46Post-Injection 15:30 14.94+ 43.74 70.2 116.0 15.96Pre-Injection 08:00 7.06 23.54 146.2 108.0 17.64Post-Injection 15:58 6.25 23.74 80.1 102.0 18.41Pre-Injection 08:53 6.03 16.31 87.6 82.0 17.95Post-Injection 17:46 5.82 17.67 90.2 79.0 18.43Pre-Injection 07:35 5.48 15.95 141.6 78.0 18.05Post-Injection 17:39 5.77 14.80 106.6 79.0 18.22Pre-Injection 07:16 5.89 11.70 168.0 75.0 18.22Post-Injection++ 16:02 11.63 14.13 -94.5 81.0 19.01H2O2H2O2NaMnO4NaMnO4NaMnO4MW-58MW-57INJ-2 StoppedH2O2H2O2H2O2NaMnO4NaMnO4NaMnO4Within ROI (Interior to Pilot Test Area)08/19/2109/02/2109/15/2109/16/2109/17/2108/18/2108/19/2109/02/2109/15/2109/16/2109/17/21Page 1 of 3 Table 3.5 (Continued)Geochemical Parameters During ISCO Injections In Situ Chemical Oxidation Pilot Test ReportHolcomb Creosote Company Site, Yadkinville, Yadkin County, North CarolinaMonitoring Well Monitoring Event Injection MaterialDate TimepH(S.U.)DO(mg/L)ORP(mV)Specific Conductivity(μS/cm)Temperature(°C)BaselineH2O208/18/21 10:34 5.17 0.14 -79.1 148.0 16.80Pre-Injection 08:23 6.91 0.07 -91.8 147.0 14.33Post-Injection 15:04 9.95+ 0.27 -36.9 149.0 14.11Pre-Injection 08:12 5.95 0.54 112.3 135.0 17.31Post-Injection 16:14 6.05 0.26 55.9 138.0 17.54Pre-Injection 09:20 6.18 0.71 56.9 116.0 17.01Post-Injection 17:56 6.03 0.62 58.7 122.0 17.05Pre-Injection 07:55 5.95 0.57 57.8 124.0 16.94Post-Injection 17:51 6.01 0.17 56.3 119.0 17.46Pre-Injection 07:29 6.04 0.36 86.5 114.0 18.35Post-Injection++ 16:13 11.48 0.27 -372.4 118.0 17.77Pre-Injection* 09:15 5.90 0.56 120.7 81.0 17.7716:36 5.37 50.47 65.2 77.0 16.6616:39 5.39 0.05 59.8 77.0 19.77Pre-Injection 09:30 5.82 0.11 87.8 81.0 17.23Post-Injection 18:00 5.68 0.54 87.0 89.0 17.66Pre-Injection 08:04 5.60 0.49 99.4 78.0 17.30Post-Injection 17:56 5.66 1.93 85.8 84.0 18.48Pre-Injection 07:33 5.73 0.41 110.9 79.0 18.31Post-Injection++ 16:20 11.37 0.20 -378.0 85.0 18.01Pre-Injection* 08:19 6.43 0.45 53.6 190.0 18.26Post-Injection 16:22 6.58 0.12 10.0 203.0 17.48Pre-Injection 09:37 6.94 0.08 -55.9 203.0 15.67Post-Injection 18:08 6.81 0.14 -59.7 199.0 17.84Pre-Injection 08:09 6.84 0.15 -42.6 191.0 18.96Post-Injection 18:01 6.82 0.58 -39.5 196.0 19.05Pre-Injection 07:39 6.90 0.23 -20.8 199.0 18.97Post-Injection++ 16:25 12.47 0.33 -322.1 201.0 18.29NaMnO4H2O2H2O2H2O2NaMnO4NaMnO4NaMnO4NaMnO4NaMnO4Downgradient MW-209/15/2109/16/2109/17/2109/02/2109/02/2109/15/2109/16/2109/17/21Post-InjectionH2O2NaMnO4NaMnO4NaMnO4MW-7MW-608/19/2109/02/2109/15/2109/16/2109/17/21Page 2 of 3 Table 3.5 (Continued)Geochemical Parameters During ISCO Injections In Situ Chemical Oxidation Pilot Test ReportHolcomb Creosote Company Site, Yadkinville, Yadkin County, North CarolinaMonitoring Well Monitoring Event Injection MaterialDate TimepH(S.U.)DO(mg/L)ORP(mV)Specific Conductivity(μS/cm)Temperature(°C)BaselineH2O208/18/21 10:39 5.07 3.07 -61.2 94.0 17.79Pre-Injection 08:32 6.59 0.29 -86.0 129.0 15.89Post-Injection 15:15 16.01+ 0.44 -47.5 0.1 15.36Notes:* indicates the monitoring well was not included in the baseline monitoring prior to any injections occurring.+ indicates that the pH probe failed continuing calibration verification and was suspected of malfunctioning.++ indicates that the water quality meter is suspected of malfunctioning based on multiple unexpected geochemical measurements during this event. °C = degrees Celsiusmg/L = milligrams per litermV = millivoltsμS/cm = microsiemens per centimeterDO = dissolved oxygenH2O2 = hydrogen peroxideISCO = in situ chemical oxidationNaMnO4 = sodium permanganateORP = oxidation reduction potentialROI = radius of influenceS.U. = standard unitsH2O2SidegradientMW-308/19/21Page 3 of 3 Table 3.6ISCO Pilot Test Sampling and Analysis PlanIn Situ Chemical Oxidation Pilot Test ReportHolcomb Creosote Company Site, Yadkinville, Yadkin County, North CarolinaSVOCsDissolved Metals Permanganate Field TestHydrogen Peroxide and Iron Field Test SVOCsDissolved Metals Permanganate Field TestHydrogen Peroxide and Iron Field TestSaprolite MW-6 17 to 27 A A A A A AMW-223 to 33 (Partially in the PWR zone)AAAAAAMW-5723 to 33(Within the PWR zone)AAAAAAMW-5823 to 33 (Within the PWR zone)AAAAAASVOCsDissolved Metals Permanganate Field TestHydrogen Peroxide and Iron Field Test SVOCsDissolved Metals Permanganate Field TestHydrogen Peroxide and Iron Field TestSaprolite MW-6 17 to 27 A A Only Visual Observation A A AMW-223 to 33 (Partially in the PWR zone)A A Only Visual Observation A A Only Visual ObservationMW-5723 to 33(Within the PWR zone)A A Only Visual Observation A A Only Visual ObservationMW-5823 to 33 (Within the PWR zone)A A Only Visual Observation A A Only Visual ObservationNotes:1 This occurred approximately 12 days after the second round of modified Fenton's reagent (MFR) injections and before the sodium permanganate injections.2 This occurred approximately 1 month after the sodium permanganate injections.3 This occurred approximately 3 months after the sodium permanganate injections.A= analyzed NA = not analyzedft bgs = feet below ground surface PWR = partially weathered rockISCO = in situ chemical oxidation SVOC = semivolatile organic compound7/28/2021 to 7/29/2021 9/14/2021Treatment ZoneMonitoring WellScreen Interval(ft bgs)Baseline 2 Weeks Post-MFR Injections1AnalytesTreatment IntervalSampling LocationScreen Interval(ft bgs)1 Month Post-Permanganate Injections2PWR10/13/2021 to 10/14/2021 12/7/2021AnalytesPWRNAIron and Manganese Only3 Months Post-Permanganate Injections3NA NAPage 1 of 1 Table 4.1Performance Monitoring Sampling Results: Field Parameters, Field Tests, and SVOCsIn Situ Chemical Oxidation Pilot Test ReportHolcomb Creosote Company Site, Yadkinville, Yadkin County, North CarolinaMonitoring WellScreen Groundwater Cleanup Levels1 7/28/2021(Baseline)9/14/2021 (2 Weeks Post-MFR)210/13/2021 (1 Month Post-Permanganate )312/7/2021 (3 Months Post-Permanganate )47/28/2021(Baseline)9/14/2021 (2 Weeks Post-MFR )210/14/2021 (1 Month Post-Permanganate )312/7/2021 (3 Months Post-Permanganate )47/28/2021(Baseline)9/14/2021 (2 Weeks Post-MFR )210/13/2021 (1 Month Post-Permanganate)312/7/2021 (3 Months Post-Permanganate)47/28/2021(Baseline)9/14/2021 (2 Weeks Post-MFR)210/14/2021 (1 Month Post-Permanganate)312/7/2021 (3 Months Post-Permanganate) 4Field ParametersDissolved Oxygen (mg/L) -- 0.2 17.8 22.1 6.7 0.4 17.4 7.6 0.5 1.2 4.1 1.9 1.9 0.2 0.1 1.4 0.2ORP (mV) -- 85.1 153.8 811.0 761.1 -147.3 84.4 494.1 637.8 12.2 56.6 3.0 806.3 39.8 121.5 545.0 29.0pH (S.U.) -- 5.5 5.9 1.5 6.1 6.0 6.0 5.8 5.9 5.7 6.1 6.8 5.4 5.2 5.7 5.7 5.8Specific Conductivity (μS/cm) -- 109.0 78.0 1,450.0 660.0177.0 103.0 2,340.0 123.0 158.0 126.0138.0 259.0 122.0 85.0 387.0 155.0Temperature (°C) -- 19.7 17.9 19.4 15.7 18.5 18.318.7 14.6 18.5 18.8 18.114.9 17.4 19.1 19.4 15.6Turbidity (NTU) -- 5.2 1.2 63.1 33.1 9.8 9.3 50.7 38.4 12.6 5.2 10.4 63.1 9.8 14.2 41.0 6.5Field Test Kits (mg/L)Hydrogen Peroxide --Not Valid5Not Valid5Not Measured Not MeasuredNot Valid5Not Valid5Not Measured Not Measured Not Valid Not Valid Not Measured Not Measured Not Valid Not Valid Not Measured Not MeasuredIron -- 0.9 5.7 Not Measured Not Measured 8.4 2.3 Not Measured Not Measured 17.4 12.7 Not Measured Not Measured 11.7 4.4 Not Measured Not MeasuredPermanganate -- Not Analyzed 0 Visibly Purple Visibly Light Purple Not Analyzed 0 Visibly Purple Visibly Purple Not Measured 0 Not MeasuredVisibly Light Pink Not Measured 0 Visibly Purple 0.4Semivolatile Organic Compounds (µg/L)(3-and/or 4-)Methylphenol -- 10 U 10 U 9.9 U 10 U 10 U 10 U 10 U 10 U 11 U 10 U 10 U 10 U 9.9 U 10 U 10 U 10 U1,1-Biphenyl 400 140 130 140 J, QC-2 180 100 80 110 J, QC-2 140 110 84 96 J, QC-2 120 140 150 120 J, QC-2 1101,4-Dioxane -- 2 U 2 U 2 U 2 U 2 U 2 U 2 U 2 U 2.1 U 2 U 2.1 U 2 U 2 U 2 U 2.1 U 2 U1-Methylnaphthalene -- 430 420 J, QL-2 220 J, QL-2 330 310 260 J, QL-2120 J, QL-2 380 420 420 J, QL-2 540 J,QL-2 560 450 540 J, QL-2 250 J, QL-2 3702,3,4,6-Tetrachlorophenol -- 10 U 10 U 9.9 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 10 U 5 U, J, QS-32,4,5-Trichlorophenol -- 10 U 10 U 9.9 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 10 U 5 U, J, QS-32,4,6-Trichlorophenol -- 10 U 10 U 9.9 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 10 U 5 U, J, QS-32,4-Dichlorophenol -- 10 U 10 U 500 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 210 U 5 U, J, QS-32,4-Dimethylphenol -- 10 U 10 U 500 U 5 U 10 U 10 U 10 U 5 U 11 U 20 U 10 U 5 U 9.9 U 10 U 210 U 5 U2,4-Dinitrophenol -- 20 U 20 U 20 U 10 U 20 U 20 U 20 U 10 U 21 U 10 U 21 U 10 U 20 U 20 U 21 U 10 U2,4-Dinitrotoluene -- 10 U 10 U 9.9 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 10 U 5 U2,6-Dinitrotoluene -- 10 U 10 U 9.9 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 10 U 5 U2-Chloronaphthalene -- 10 U 10 U 9.9 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 10 U 5 U2-Chlorophenol -- 10 U 10 U 9.9 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 10 U 5 U2-Methyl-4,6-dinitrophenol -- 10 U 10 U 9.9 U 10 U 10 U 10 U 10 U 10 U 11 U 10 U 10 U 10 U 9.9 U 10 U 10 U 10 U2-Methylnaphthalene 30 980 830 450 730 730 480 230 1,000 810 760 1,000 1,100 1,000 1,100 580 8002-Methylphenol -- 10 U 10 U 9.9 U 10 U 10 U 10 U 10 U 10 U 11 U 10 U 10 U 10 U 9.9 U 10 U 10 U 10 U2-Nitroaniline -- 10 U 10 U 9.9 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 10 U 5 U2-Nitrophenol -- 10 U 10 U 500 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 210 U 5 U3,3'-Dichlorobenzidine -- 10 U 10 U 9.9 U 10 U 10 U 10 U 10 U 10 U 11 U 10 U 10 U 10 U 9.9 U 10 U 10 U 10 U3-Nitroaniline -- 10 U 10 U 9.9 U 10 U 10 U 10 U 10 U 10 U 11 U 10 U 10 U 10 U 9.9 U 10 U 10 U 10 U4-Bromophenyl phenyl ether -- 10 U 10 U 9.9 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 10 U 5 U4-Chloro-3-methylphenol -- 10 U 10 U 500 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 210 U 5 U, J, QS-34-Chloroaniline -- 10 U 10 U 500 U, J, QC-1 10 U 10 U 10 U 10 U 10 U 11 U 10 U 10 U 10 U 9.9 U 10 U 210 U, J, QC-1 10 U4-Chlorophenyl phenyl ether -- 10 U 10 U 9.9 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 10 U 5 U4-Nitroaniline -- 10 U 10 U 9.9 U 10 U 10 U 10 U 10 U 10 U 11 U 10 U 10 U 10 U 9.9 U 10 U 10 U 10 U4-Nitrophenol -- 10 U 10 U 9.9 U 10 U 10 U 10 U 10 U 10 U 11 U 10 U 10 U 10 U 9.9 U 10 U 10 U 10 UAcenaphthene 1,736 690 510 50 27 450 410 9.5 460 470 470 590 520 670 710 130 210Acenaphthylene -- 4.2 3.4 3.2 5 U 5.9 4 2 U 13 2.1 U 2 U 2.1 U 5 U 5.4 4.1 4.2 12Acetophenone -- 10 U 10 U 7.4 J, Q-2 6.1 J, CLP01 10 U 10 U 10 U 10 U 11 U 10 U 10 U 3.8 J, CLP01 9.9 U 10 U 4.8 J, Q-2 2.6 J, CLP01Anthracene -- 1 J, Q-2 2 U 2 U 5 U 5.3 1.4 J, Q-2 2 U 2.3 J, CLP01 3.7 3.3 3.9 1.9 J, CLP01 7.4 5 2.1 U 7.2Atrazine -- 10 U10 U, J, QL-1, QR-19.9 U, J, QL-1, QR-1, QC-110 U 10 U10 U, J, QL-1, QR-110 U, J, QL-1, QR-1, QC-110 U 11 U10 U, J, QL-2, QR -110 U, J, QL-1, QR-1, QC-110 U 9.9 U10 U, J, QL-1, QR-110 U, J, QL-1, QR-1, QC-110 UBenzaldehyde -- 10 U 10 U 9.9 U 10 U, J, CLP16, QC-3 10 U 10 U 10 U 10 U, J, CLP16, QC-3 11 U 10 U 10 U10 U, J, CLP16, QC-39.9 U 10 U 10 U10 U, J, CLP16, QC-3Analyte NameMW-2MW-57 MW-58MW-623-33 ft bgs23-33 ft bgs 23-33 ft bgs17-27 ft bgsPage 1 of 2 Table 4.1 (Continued)Performance Monitoring Sampling Results: Field Parameters, Field Tests, and SVOCsIn Situ Chemical Oxidation Pilot Test ReportHolcomb Creosote Company Site, Yadkinville, Yadkin County, North CarolinaMonitoring WellScreen Groundwater Cleanup Levels1 7/28/2021(Baseline)9/14/2021 (2 Weeks Post-MFR)210/13/2021 (1 Month Post-Permanganate )312/7/2021 (3 Months Post-Permanganate )47/28/2021(Baseline)9/14/2021 (2 Weeks Post-MFR )210/14/2021 (1 Month Post-Permanganate )312/7/2021 (3 Months Post-Permanganate )47/28/2021(Baseline)9/14/2021 (2 Weeks Post-MFR )210/13/2021 (1 Month Post-Permanganate)312/7/2021 (3 Months Post-Permanganate)47/28/2021(Baseline)9/14/2021 (2 Weeks Post-MFR)210/14/2021 (1 Month Post-Permanganate)312/7/2021 (3 Months Post-Permanganate) 4Analyte NameMW-2MW-57 MW-58MW-623-33 ft bgs23-33 ft bgs 23-33 ft bgs17-27 ft bgsSemivolatile Organic Compounds (continued)Benzo(a)anthracene -- 2 U 2 U 2 U 5 U 2 U 2 U 2 U 5 U 2.1 U 2 U 2.1 U 5 U 2 U 2 U 2.1 U 5 UBenzo(a)pyrene -- 2 U 2 U 2 U 5 U 2 U 2 U 2 U 5 U 2.1 U 2 U 2.1 U 5 U 2 U 2 U 2.1 U 5 UBenzo(b)fluoranthene -- 2 U 2 U 2 U 5 U 2 U 2 U 2 U 5 U 2.1 U 2 U 2.1 U 5 U 2 U 2 U 2.1 U 5 UBenzo(g,h,i)perylene -- 2 U 2 U 2 U 5 U 2 U 2 U 2 U 5 U 2.1 U 2 U 2.1 U 5 U 2 U 2 U 2.1 U 5 UBenzo(k)fluoranthene -- 2 U 2 U 2 U 5 U 2 U 2 U 2 U 5 U 2.1 U 2 U 2.1 U 5 U 2 U 2 U 2.1 U 5 UBenzyl alcohol -- 10 U 10 U 9.9 U Not Analyzed 10 U 10 U 10 U Not Analyzed 11 U 10 U 10 U Not Analyzed 9.9 U 10 U 10 U Not AnalyzedBenzyl butyl phthalate -- 10 U,J,QL-3 10 U 9.9 U 5 U 10 U, J, QL-3 10 U 10 U 5 U 11 U, J, QL-3 10 U 10 U 5 U 9.9 U, J, QL-3 10 U 10 U 5 UBis(2-chloro-1-methylethyl) ether -- 10 U 10 U 9.9 U 10 U 10 U 10 U 10 U 10 U 11 U 10 U 10 U 10 U 9.9 U 10 U 10 U 10 UBis(2-chloroethoxy)methane -- 10 U 10 U 500 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 210 U 5 UBis(2-Chloroethyl) Ether -- 10 U 10 U 9.9 U 10 U 10 U 10 U 10 U 10 U 11 U 10 U 10 U 10 U 9.9 U 10 U 10 U 10 UBis(2-ethylhexyl) phthalate -- 10 U 10 U 9.9 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 10 U 5 UCaprolactam -- 10 U 10 U 500 U 10 U 10 U 10 U 10 U 10 U 11 U 10 U 10 U 10 U 9.9 U 10 U 210 U 10 UCarbazole -- 220 240 8.3 18 130 130 2 130 140 170 150 110 420 430 13 200Chrysene -- 2 U 2 U 2 U 5 U 2 U 2 U 2 U 5 U 2.1 U 2 U 2.1 U 5 U 2 U 2 U 2.1 U 5 UDibenz(a,h)anthracene -- 2 U 2 U 2 U 5 U 2 U 2 U 2 U 5 U 2.1 U 2 U 2.1 U 5 U 2 U 2 U 2.1 U 5 UDibenzofuran 28 360 320 260 290 250 230 240 380 260 240 280 290 350 370 220 240Diethyl phthalate -- 10 U 10 U 9.9 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 10 U 5 UDimethyl phthalate -- 10 U 10 U 9.9 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 10 U 5 UDi-n-butylphthalate -- 10 U 10 U 9.9 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 10 U 5 UDi-n-octylphthalate -- 10 U 10 U 9.9 U 10 U 10 U 10 U 10 U 10 U 11 U 10 U 10 U 10 U 9.9 U 10 U 10 U 10 UFluoranthene -- 2.7 1.8 J, Q-2 0.49 J, Q-2 5 U 7.6 2.6 0.73 J, Q-2 11 10 8.5 12 10 11 8.7 7.4 8.8Fluorene -- 150 120 4.6 J, QL-2 21 130 98 0.82 J, QL-2, Q-2 160 190 160 190 J, QL-2 200 230 240 56 J, QL-2 140Hexachlorobenzene -- 10 U, J, QL-3 10 U 9.9 U 5 U 10 U, J, QL-3 10 U 10 U 5 U 11 U, J, QL-3 10 U 10 U 5 U 9.9 U, J, QL-3 10 U 10 U 5 UHexachlorocyclopentadiene -- 10 U 10 U 9.9 U 10 U 10 U 10 U 10 U 10 U 11 U 10 U 10 U 10 U 9.9 U 10 U 10 U 10 UHexachloroethane -- 10 U 10 U 9.9 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 10 U 5 UIndeno (1,2,3-cd) pyrene -- 2 U 2 U 2 U 5 U 2 U 2 U 2 U 5 U 2.1 U 2 U 2.1 U 5 U 2 U 2 U 2.1 U 5 UIsophorone -- 10 10 U 500 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 210 U 5 UNaphthalene 6 11,000 8,800 5,800 7,500 6,600 5,200 3,000 7,600 5,100 5,000 2,800 3,800 14,000 13,000 9,200 14,000Nitrobenzene -- 10U 10 U 500 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 210 U 5 Un-Nitroso di-n-Propylamine -- 10 U 10 U 9.9 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 10 U 5 Un-Nitrosodiphenylamine/Diphenylamine -- 10 U 10 U 9.9 U 5 U 10 U 10 U 10 U 5 U 11 U 10 U 10 U 5 U 9.9 U 10 U 10 U 5 UPentachlorophenol -- 10 U 10 U 9.9 U 10 U 10 U 10 U 10 U 10 U 11 U 10 U 10 U 10 U 9.9 U 10 U 10 U 10 U, J, QS-3Phenanthrene -- 120 120 3.5 22 110 77 0.53 J, Q-2 180 210 180 220 200 170 190 51 100Phenol -- 10 U 10 U 9.9 U 10 U 10 U 10 U 10 U 1.4 J, CLP01 11 U 10 U 10 U 10 U 9.9 U 10 U 10 U 10 UPyrene -- 1.2 J, Q-2 0.76 J, Q-2 2 U 5 U 4.2 1.4 J, Q-2 2 U 5.1 5.6 4.3 5.4 4.2 J, CLP01 6.7 5.7 2.1 U 4.7 J, CLP01Notes:1 U.S. Enviornmental Protection Agency, 2018. Record of Decision for Holcomb Creosote Company Superfund Site, Yadkinville, Yadkin County, North CarolinaQualifier Definitions:2 This occurred approximately 12 days after the second round of MFR injections and before the sodium permanganate injections.J = Identification of the analyte is acceptable; the reported value is an estimate.3 This occurred approximately 1 month after the sodium permanganate injections.U = Analyte was not detected at or above the reporting limit.4 This occurred approximately 3 months after the sodium permanganate injections.Q-2 = Result is greater than MDL but less than MRL.5Results Not Valid indicates that the hydrogen peroxide field test did not produce results that were reliable. It is likely that field interference impacted the results.QC-1 = Analyte concentration low in continuing calibration verification standard.Only detected compounds are includedQC-2 = Analyte concentration high in continuing calibration verification standard. -- = not established MDL = method detection limitQC-3 = Analyte calibration criteria not met.°C = degree Celsius MRL = method reporting limitQL-1 = Laboratory control spike recovery is less than method control limits.μg/L = microgram per liter MFR = modified Fenton's reagentQL-2 = Laboratory control spike recovery is greater than method control limits.μS/cm = microsiemens per centimeter NTU = nephelometric turbidity unitQL-3 = Laboratory control spike precision is outside method control limits.mg/L = milligram per liter ORP = oxidation reduction potentialQR-1 = MRL verification recovery is less than the lower control limits.mV = millivolt SVOC = semivolatile organice compoundQS-3 = Surrogate recovery is lower than established control limits.ft bgs = feet below ground surface S.U. = standard unitsCLP01 = Concentration reported is less than the lowest standard on calibration curve.Cleanup level exceededCLP15 = TIC results reported as identified by lab IDs not verified.CLP16 = Initial calibration response erratic.Page 2 of 2 Table 4.2Performance Monitoring Sampling Results: MetalsIn Situ Chemical Oxidation Pilot TestHolcomb Creosote Company Site, Yadkinville, Yadkin County, North CarolinaMonitoring WellScreen Interval Groundwater Cleanup Levels1 7/28/2021(Baseline)9/14/2021 (2 Weeks Post-MFR)210/13/2021 (1 Month Post-Permanganate)312/7/2021 (3 Months Post-Permanganate)47/28/2021(Baseline)9/14/2021 (2 Weeks Post-MFR)210/14/2021 (1 Month Post-Permanganate)312/7/2021 (3 Months Post-Permanganate)47/28/2021(Baseline)9/14/2021 (2 Weeks Post-MFR)210/13/2021 (1 Month Post-Permanganate)312/7/2021 (3 Months Post-Permanganate)47/28/2021(Baseline)9/14/2021 (2 Weeks Post-MFR)210/14/2021 (1 Month Post-Permanganate) 312/7/2021 (3 Months Post-Permanganate)4Metals (µg/L)Aluminum (Total) -- -- 200 U 200 U 51 J, Q-2 -- 200 U 200 U 440 -- 200 U 280 140 J, Q-2 -- 200 U 200 U 25 J, Q-2Aluminum (Dissolved) -- -- 200 U 200 U 19 J, Q-2 -- 200 U 200 U 200 U -- 200 U 200 U 200 U -- 200 U 200 U 200 UAntimony (Total) -- -- 60 U 60 U 60 U -- 60 U 60 U 60 U -- 60 U 60 U 60 U -- 60 U 60 U 60 UAntimony (Dissolved) -- -- 60 U 60 U 60 U -- 60 U 60 U 60 U -- 60 U 60 U 60 U -- 60 U 60 U 60 UArsenic (Total) -- -- 10 U 7.3 J, CLP36, Q-2 16 CLP36 -- 10 U 22 CLP36 10 U -- 10 U 10 U 7.2 J, CLP36, Q-2 -- 10 U 10 U 13 J, CLP36, QM-4Arsenic (Dissolved) -- -- 10 U 8.2 J, CLP36, Q-2 10 U -- 10 U 22 CLP36 10 U -- 10 U 10 U 10 U -- 10 U 10 U 10 UBarium (Total) -- -- 62 J, Q-2 710 82 J, Q-2 -- 98 J, Q-2 1,500 1,500 -- 58 J, Q-2 69 J, Q-2 160 J, Q-2 -- 120 J, Q-2 200 U 89 J, Q-2Barium (Dissolved) -- -- 61 J, Q-2 510 39 J, Q-2 -- 100 J, Q-2 1,300 32 J, Q-2 -- 59 J, Q-2 63 J, Q-2 50 J, Q-2 -- 110 J, Q-2 200 U 91 J, Q-2Beryllium (Total) -- -- 5 U 5 U 5 U -- 5 U 5 U 5 U -- 5 U 5 U 5 U -- 5 U 5 U 5 UBeryllium (Dissolved) -- -- 5 U 5 U 5 U -- 5 U 5 U 5 U -- 5 U 5 U 5 U -- 5 U 5 U 5 UCadmium (Total) -- -- 5 U 5 U 5 U -- 5 U 2.8 J, Q-2 5 U -- 5 U 5 U 5 U -- 5 U 5 U 5 UCadmium (Dissolved) -- -- 5 U 1.2 J, Q-2 5 U -- 5 U 2.8 J, Q-2 5 U -- 5 U 5 U 5 U -- 5 U 5 U 5 UCalcium (Total) -- -- 6,300 150,000 75,000 -- 8,400 160,000 11,000 -- 5,400 6,300 31,000 -- 2,300 J, Q-2 2,500 J, Q-2 1,500 J, Q-2Calcium (Dissolved) -- -- 6,300 160,000 82,000 -- 9,000 160,000 6,800 -- 5,500 6,300 31,000 -- 2,300 J, Q-2 2,200 J, Q-2 1,600 J, Q-2Chromium (Total) -- -- 10 U 150 J, CLP26 130 -- 10 U 370 J, CLP26 15 -- 10 U 10 U 9.5 J, Q-2 -- 10 U 61 J, CLP26 64Chromium (Dissolved) -- -- 10 U 160 J, CLP26 150 -- 10 U 390 J, CLP26 8.9 J, Q-2 -- 10 U 10 U 10 -- 10 U 62 J, CLP26 46Cobalt (Total) -- -- 50 U 50 U 50 U -- 50 U 50 U 10 J, Q-2 -- 16 J, Q-2 19 J, Q-2 17 J, Q-2 -- 50 U 50 U 6.9 J, Q-2Cobalt (Dissolved) 9 -- 50 U 50 U 50 U -- 50 U 50 U 50 U -- 15 J, Q-2 19 J, Q-2 50 U -- 50 U 50 U 7.1 J, Q-2Copper (Total) -- -- 25 U 25 U 25 U -- 25 U 25 U 25 U -- 25 U 25 U 2.8 J, Q-2 -- 25 U 25 U 9.7 J, Q-2Copper (Dissolved) -- -- 25 U 25 U 25 U -- 25 U 25 U 25 U -- 25 U 25 U 25 U -- 25 U 25 U 25 UIron (Total) -- 1,600 900 100 U 100 U 15,000 2,600 100 U 4,600 16,000 13,000 15,000 16,000 11,000 5,400 100 U 3,600Iron (Dissolved) 20,256 1,200 850 100 U 100 U 14,000 2,500 100 U 100 U 15,000 13,000 15,000 100 U 12,000 CR 5,100 100 U 3,200Lead (Total) -- -- 10 U 31 12 -- 10 U 77 19 -- 10 U 10 U 14 -- 10 U 10 U 11Lead (Dissolved) -- -- 10 U 34 12 U, B-4 -- 10 U 78 16 U, B-4 -- 10 U 10 U 12 U, B-4 -- 10 U 10 U 12 U, B-4Magnesium (Total) -- -- 1,400 J, Q-2 39,000 21,000 -- 2,300 J, Q-2 38,000 2,000 J, Q-2 -- 1,300 J, Q-2 1,800 J, Q-2 9,100 -- 950 J, Q-2 1,300 J, Q-2 600 J, Q-2Magnesium (Dissolved) -- -- 1,400 J, Q-2 40,000 23,000 -- 2,400 J, Q-2 39,000 1,700 J, Q-2 -- 1,400 J, Q-2 1,700 J, Q-2 9,400 -- 910 J, Q-2 1,200 J, Q-2 600 J, Q-2Manganese (Total) -- 1,100 820 330,000 15,000 1,700 1,700 840,000 33,000 2,900 2,700 3,600 16,000 3,000 1,800 4,600 2,400Manganese (Dissolved) 694 1,100 880 360,000 750 1,700 1,800 840,000 440 2,900 2,900 3,500 13,000 3,100 CR 1,900 19,000 2,600Nickel (Total) -- -- 40 U 32 J, Q-2 1.9 J, Q-2 -- 40 U 79 6.3 J, Q-2 -- 40 U 40 U 8.8 J, Q-2 -- 40 U 40 U 75Nickel (Dissolved) -- -- 40 U 34 J, Q-2 40 U -- 40 U 81 40 U -- 40 U 40 U 5.1 J, Q-2 -- 40 U 40 U 90Potassium (Total) -- -- 1,600 J, Q-2 5,700 5,000 -- 2,300 J, Q-2 11,000 1,600 J, Q-2 -- 2,500 J, Q-2 2,900 J, Q-2 3,200 J, Q-2 -- 1600 J, Q-2 3400 J, Q-2 690 J, Q-2Potassium (Dissolved) -- -- 1,500 J, Q-2 5,700 4,900 J, Q-2 -- 2,400 J, Q-2 11,000 1,100 J, Q-2 -- 2,500 J, Q-2 2,700 J, Q-2 3,000 J, Q-2 -- 1600 J, Q-2 3300 J, Q-2 630 J, Q-2Selenium (Total) -- -- 35 U 170 CLP36 35 U, J, CLP25 -- 35 U 410 CLP36 35 U, J, CLP25 -- 35 U 35 U 35 U, J, CLP25 -- 35 U 35 U 35 U, J, CLP25Selenium (Dissolved) -- -- 35 U 180 CLP36 35 U, J, CLP25 -- 35 U 420 CLP36 35 U, J, CLP25 -- 35 U 35 U 14 J, CLP36, Q-2 -- 35 U 13 J, CLP36, Q-2 35 U, J, CLP25Silver (Total) -- -- 10 U 78 10 U -- 10 U 200 10 U -- 10 U 10 U 10 U -- 10 U 10 U 10 USilver (Dissolved) -- -- 10 U 83 10 U -- 10 U 200 10 U -- 10 U 10 U 10 U -- 10 U 4.9 J, Q-2 10 USodium (Total) -- -- 7,400 98,000 130,000 -- 7,300 370,000 18,000 -- 7,600 8,600 19,000 -- 8,300 93,000 28,000Sodium (Dissolved) -- -- 7,300 100,000 130,000 -- 7,800 380,000 17,000 -- 7,900 8,600 19,000 -- 8,200 92,000 27,000Thallium (Total) -- -- 25 U130 CLP36 25 U -- 25 U 320 CLP36 25 U -- 25 U 25 U 25 U -- 25 U 25 U 25 UThallium (Dissolved) -- -- 25 U140 CLP36 25 U -- 25 U 340 CLP36 25 U -- 25 U 25 U 25 U -- 25 U 7.4 J, CLP36, Q-2 25 UVanadium (Total) -- -- 50 U 50 U 11 J, Q-2 -- 50 U 50 U 29 J, Q-2 -- 50 U 50 U 14 J, Q-2 -- 50 U 50 U 50 UVanadium (Dissolved) -- -- 50 U 50 U 50 U -- 50 U 50 U 50 U -- 50 U 50 U 13 J, Q-2 -- 50 U 50 U 50 UZinc (Total) -- -- 60 U 53 J, Q-2 64 -- 60 U 63 13 J, Q-2 -- 60 U 60 U 62 -- 60 U 60 U 15 J, Q-2Zinc (Dissolved) --‐‐60 U 41 J, Q-2 17 J, Q-2‐‐60 U 47 J, Q-2 60 U‐‐60 U 60 U 60 U‐‐60 U 22 J, Q-2 19 J, Q-2Notes:1 U.S. Environmental Protection Agency, 2018. Record of Decision for Holcomb Creosote Company Superfund Site, Yadkinville, Yadkin County, North CarolinaQualifier Definitions:2 This occurred approximately 12 days after the second round of MFR injections and before the sodium permanganate injectionsU = Analyte was not detected at or above the reporting limit.3 This occurred approximately 1 month after the sodium permanganate injectionsB4 = Level in blank impacts MRLs.4 This occurred approximately 3 months after the sodium permanganate injectionsCLP25 = PE sample recover scored as warning-low.μg/L = microgram per literCLP36 = Identification/Concentration of analyte not confirmed by ICP-MS. -- = not established for groundwater cleanup level / not analyzed for resultsJ = Identification of the analyte is acceptable; the reported value is an estimate.ft bgs = feet below ground surfaceQ-2 = Result greater than MDL but less than MRL.MFR = Modified Fenton's ReagentCR = Dissolved > total; RPD is within method allowed precision.Cleanup level exceededAnalyte NameMW-57 MW-58 MW-2 MW-623-33 ft bgs 23-33 ft bgs 23-33 ft bgs 17-27 ft bgsPage 1 of 1 FIGURES Dobbins Pond Figure 1.1 Site Location Legend HGL—ISCO Pilot Test ReportHolcomb Creosote Site—Yadkinville, North Carolina 0 450 900225 Feet \\aro-01\prj1$\H\HGL\Holcomb Creosote\GIS\aprx\Holcomb_Creosote\Holcomb_Creosote.mxd8/11/2021 JGSource: HGL, JMWaller, Versar ArcGIS Online USGS National Map !U ^_ Holcomb Creosote Site NORTH CAROLINA General Location Holcomb Creosote Property Boundary Former Holcomb Creosote Operations Area DDDDDDDDDDDDD D DDDD D DDDDDDDDDD D D DDDDDDDDDDD£¤601 Land FarmArea Boundary Drip Pad(removed) Storage Office Treatment Vessel(removed) Distillation Evaporator(removed) FormerDrum Storage Area Concrete Pit(removed) Creosote Work Tank(removed) Creosote Storage Tank(removed)Gasoline UST(removed) Steel Settling Tank(removed) Overflow CreosoteStorage Tank(removed) Diesel Tank(removed) Un a m e d T r i b u t a r y Figure 1.2Site Facility Plan Legend HGL—ISCO Pilo t Test Rep o rtHo lco m b Creo so te Site—Yadkinville, No rth Caro lina 0 80 16040 Feet ³\\aro -01\p rj1$\H\HGL\Ho lco m b Creo so te\GIS\m xd\(2-01)Site_ Facility_ Plan.m xd1/21/2022 JG So urce: HGL, JMWaller, Versar ArcGIS Online Im agery (Clarity) Note:UST=underground storage tank FenceD Surface Water Course Wetlands Site Boundary Landfarm (closed) Surface Impoundment Existing Structure Former Structure Former Holcomb Creosote Operations Area DDDDD DD DD D D DDD D DDDD D D D D DDD D DD D D D "´"´ "´"´"´ "´ "´ "´ "´ "´ "´ "´ "´ "´ "´ "´ "´ "´ "´ "´ "´ "´ "´ "´ "´"´ "´ "´ "´ "´ Dobbins Pond £¤601 MW-1ANM U n a m e d T r i b u t a r y MW-X857.37 MW-8858.09 MW-7 857.24 MW-6 860.16 MW-5855.17 MW-4858.04 MW-3 858.71 MW-43857.59 MW-39 854.08 MW-37854.87 MW-35858.45 MW-34861.15 MW-33865.43 MW-32864.27 MW-31864.33 MW-30 861.23 MW-28 861.79 MW-27 861.82 MW-25 864.85 MW-24865.55 MW-23868.94 MW-22865.81 MW-21867.27 MW-20863.84 MW-19863.55 MW-17860.90 MW-15 855.87 MW-1B869.44 Production NM 864862860866858868856864862860866858868 856 Figure 1.3A February 2020 Saprolite Groundwater Elevation Contours Legend HGL—ISCO Pilot Test ReportHolcomb Creosote Site—Yadkinville, North Carolina 0 90 18045 Feet \\aro-01\prj1$\H\HGL\Holcomb Creosote\GIS\aprx\Holcomb_Creosote\Holcomb_Creosote.mxd8/11/2021 RRSource: HGL, Versar, JMWaller ArcGIS Online Imagery (Clarity) EDW "´ "´ Saprolite Monitoring Well"´ 858.45 Groundwater Elevation (ft NAVD88) Surface Water Course Landfarm (closed) Wetlands Former Holcomb Creosote Operations Area Notes: ft=feet NAVD88=North American Vertical Datum of 1988 NM=not measured February 2020 Saprolite GroundwaterElevation Contour (ft NAVD88)856 FenceD Surface Impoundment (closed) DDDDD DD DD D D DDD D DDDD DDD D DDD D DD D D D "´ "´ "´ "´ "´ "´ "´ "´ "´ "´"´ "´ "´ "´ Dobbins Pond £¤601 U n a m e d T r i b u t a r y MW-46859.08 MW-44 857.12 MW-41851.94 MW-40 854.06 MW-36854.45 MW-29861.85 MW-26 862.06 MW-18864.74 MW-16 855.76 MW-14855.03 MW-13855.62 MW-12855.33 MW-11856.39 MW-2 859.98 854856858860862864 852854856858860862864852Figure 1.3B February 2020 Partially Weathered Rock Groundwater Elevation Contours Legend HGL—ISCO Pilot Test ReportHolcomb Creosote Site—Yadkinville, North Carolina 0 90 18045 Feet \\aro-01\prj1$\H\HGL\Holcomb Creosote\GIS\aprx\Holcomb_Creosote\Holcomb_Creosote.mxd8/11/2021 RRSource: HGL, Versar, JMWaller ArcGIS Online Imagery (Clarity) EDW PWR Monitoring Well"´ "´851.94 Groundwater Elevation (ft NAVD88) Surface Water Course FenceD Landfarm (closed) Wetlands Surface Impoundment (closed) Former Holcomb Creosote Operations Area Notes: ft=feet NAVD88=North American Vertical Datum of 1988 PWR=partially weathered rock February 2020 PWR GroundwaterElevation Contour (ft NAVD88)856 DDDDD DD DD D D DDD D DDDD D D D D DDD D DD D D D "´ "´ "´"´ "´"´"´ "´ "´ "´ "´ "´ "´ "´ "´ "´ "´ "´ "´ "´ "´ "´ "´ "´ "´ "´ "´"´ "´ "´ "´ "´ Dobbins Pond £¤601 MW-48 861.21 MW-47 859.22 MW-1ANM U n a m e d T r i b u t a r y MW-X857.11 MW-8857.75 MW-7 857.15 MW-6 859.84 MW-5855.24 MW-4857.75 MW-3 859.07 MW-43857.41 MW-39 854.02 MW-37854.80 MW-35858.13 MW-34860.88 MW-33864.65 MW-32862.83 MW-31863.91 MW-30 860.86 MW-28 861.77 MW-27 861.62 MW-25 864.67 MW-24865.44 MW-23NM MW-22865.79 MW-21867.36 MW-20863.91 MW-19863.59 MW-17860.63 MW-15 855.80 MW-1B869.67 Production NM 864862860866858868856864862860866858868856 Figure 1.3C March 2020 Saprolite Groundwater Elevation Contours Legend HGL—ISCO Pilot Test ReportHolcomb Creosote Site—Yadkinville, North Carolina 0 90 18045 Feet \\aro-01\prj1$\H\HGL\Holcomb Creosote\GIS\aprx\Holcomb_Creosote\Holcomb_Creosote.mxd8/11/2021 RRSource: HGL, Versar, JMWaller ArcGIS Online Imagery (Clarity) EDW "´ "´ Saprolite Monitoring Well"´ Surface Water Course Landfarm (closed) Wetlands Former Holcomb Creosote Operations Area Notes: ft=feet NAVD88=North American Vertical Datum of 1988 NM=not measured March 2020 Saprolite GroundwaterElevation Contour (ft NAVD88)856 FenceD 858.13 Groundwater Elevation (ft NAVD88) Surface Impoundment (closed) DDDDD DD DD D D DDD D DDDD DDD D DDD D DD D D D "´ "´ "´ "´ "´ "´ "´ "´ "´ "´"´ "´ "´ "´ "´ "´ "´ "´ "´ "´ Dobbins Pond £¤601 MW-49 860.80 MW-50 864.82 MW-52 863.27 MW-51 860.72 TMW-54* 858.86 MW-53 863.51 U n a m e d T r i b u t a r y MW-46858.57 MW-44 856.93 MW-41851.91 MW-40 854.02 MW-36854.41 MW-29861.00 MW-26 861.95 MW-18864.87 MW-16 855.66 MW-14854.69 MW-13NM MW-12854.89 MW-11855.67 MW-2 859.81 854856858860862864852854856858860862864852Figure 1.3D March 2020 Partially Weathered Rock Groundwater Elevation Contours Legend HGL—ISCO Pilot Test ReportHolcomb Creosote Site—Yadkinville, North Carolina 0 90 18045 Feet \\aro-01\prj1$\H\HGL\Holcomb Creosote\GIS\aprx\Holcomb_Creosote\Holcomb_Creosote.mxd8/11/2021 RRSource: HGL, Versar, JMWaller ArcGIS Online Imagery (Clarity) EDW PWR Monitoring Well"´ Surface Water Course FenceD Landfarm (closed) Wetlands Surface Impoundment (closed) Former Holcomb Creosote Operations Area Notes: *=temporary well ft=feet NAVD88=North American Vertical Datum of 1988 NM=not measured PWR=partially weathered rock March 2020 PWR GroundwaterElevation Contour (ft NAVD88)856 851.91 Groundwater Elevation (ft NAVD88) DDDDDD D D D D D D D D D D DDDDDDDDDDDDD D D D D D D D D D D D D DD D D D D}} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} } } } } } } } } } } } } } } } }}} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }}}} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }}}} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} } } } } } } } } } } } } } } } } } }}} }} }} } } }} }} }} }} } } }} }} }} }} }} }} !' !' !' !' !' !' !' )"!' !' !')"!' !' !' )"!' )"!' INJ-3 INJ-1 INJ-2 DPT-13 MW-57 MW-58 INJ-4 MW-9 MW-8 MW-7 MW-6 MW-4 MW-3 MW-2 MW-43 MW-34 MW-17 MW-10 MW-49 MW-48 Figure 3.1 ISCO Pilot Test Injection Locations and Monitoring Well Layout 0 15 307.5 Feet \\aro-01\prj1$\H\HGL\Holcomb Creosote\GIS\aprx\Holcomb_Creosote\Holcomb_Creosote.mxd1/20/2022 RRSource: HGL, Versar ArcGIS Online Imagery (Clarity) HGL— ISCO Pilot Test ReportHolcomb Creosote Site—Yadkinville, North Carolina Notes: 1. ROI indicates radius of influence 2. PWR indicates partially weatherd rock 3. ISCO indicates in situ chemical oxidation 4. DPT indicates direct push technology 5. µg/L indicates microgram per literDDDDDDDD D D0 150 30075 Feet Legend!'Saprolite Monitoring Well !'PWR Monitoring Well !'Bedrock Monitoring Well )"!'ISCO Pilot Test Performance Monitoring Approximate GW Flow Direction - Saprolite Approximate GW Flow Direction - PWR Saprolite February/March 2020 Extent of Naphthalene (Greater than 6 µg/L) D Fence Lagoon Landfarm Wetlands Former Holocomb Creosote Operations Area PWR February/March 2020 Extent of Napthalene (Greater than 6 µg/L) Saprolite DPT Injection Location (assumed ROI of 6 feet) PWR Injection Well Location (assumed ROI of 6 feet) !'ISCO Pilot Test PWR Performance Monitoring Well (Installed July 2021) Surface Water Course Notes:µg/L - micrograms per litermg/L - milligrams per literPWR - Partially Weathered Rocks1 This occurred after the second round of MFR injections and before the sodium permanganate injections2 This occurred after the sodium permanganate injectionsPerformance Monitoring Target Compounds Results - MW-57PWR Zone - Holcomb Creosote SiteMarch 2022Figure 4.1690510502711,0008,8005,8007,500140130140180980830450730360320260290-505015025035045055065075085002,0004,0006,0008,00010,00012,000Baseline 2-Week Post-MFR Injection 1-Month Post-Permanganate Injection3-Month Post-Permanganate InjectionOxidation Reduction Potential (mV)Target Compound Concentration (μg/L)AcenaphtheneNaphthalene1,1-Biphenyl2-MethylnaphthaleneDibenzofuranOxidation Reduction Potential (ORP)122 Notes:µg/L - micrograms per litermg/L - milligrams per literPWR - Partially Weathered Rocks1 This occurred after the second round of MFR injections and before the sodium permanganate injections2 This occurred after the sodium permanganate injectionsPerformance Monitoring Target Compounds Results - MW-58PWR Zone - Holcomb Creosote SiteMarch 2022Figure 4.24504109.54606,6005,2003,0007,600100801101407304802301,000250230240380-150-505015025035045055065002,0004,0006,0008,00010,00012,000Baseline 2-Week Post-MFR Injection 1-Month Post-Permanganate Injection3-Month Post-Permanganate InjectionOxidation Reduction Potential (mV)Target Compound Concentration (μg/L)AcenaphtheneNaphthalene1,1-Biphenyl2-MethylnaphthaleneDibenzofuranOxidation Reduction Potential (ORP)122 Notes:µg/L - micrograms per litermg/L - milligrams per literPWR - Partially Weathered Rocks1 This occurred after the second round of MFR injections and before the sodium permanganate injections2 This occurred after the sodium permanganate injectionsPerformance Monitoring Target Compounds Results - MW-2PWR Zone - Holcomb Creosote SiteMarch 2022Figure 4.34704705905205,1005,0002,8003,80011084961208107601,0001,100260240280290-505015025035045055065075085002,0004,0006,0008,00010,00012,000Baseline 2-Week Post-MFR Injection 1-Month Post-Permanganate Injection3-Month Post-Permanganate InjectionOxidation Reduction Potential (mV)Target Compound Concentration (μg/L)AcenaphtheneNaphthalene1,1-Biphenyl2-MethylnaphthaleneDibenzofuranOxidation Reduction Potential (ORP)122 Notes:µg/L - micrograms per litermg/L - milligrams per liter1 This occurred after the second round of MFR injections and before the sodium permanganate injections2 This occurred after the sodium permanganate injectionsPerformance Monitoring Target Compounds Results - MW-6Saprolite Zone - Holcomb Creosote SiteMarch 2022Figure 4.467071013021014,00013,0009,20014,0001401501201101,0001,100580800350370220240010020030040050060002,0004,0006,0008,00010,00012,00014,00016,000Baseline 2-Week Post-MFR Injection 1-Month Post-Permanganate Injection3-Month Post-Permanganate InjectionOxidation Reduction Potential (mV)Target Compound Concentration (μg/L)AcenaphtheneNaphthalene1,1-Biphenyl2-MethylnaphthaleneDibenzofuranOxidation Reduction Potential (ORP)122 Notes:% - percent PWR - Partially Weathered RockComparison of Week 2 Concentration Decrease to Pore Volume DisplacementPWR Zone - Holcomb Creosote SiteMarch 2022Figure 4.50%5%10%15%20%25%30%35%40%Naphthalene Acenaphthene 2-Methylnaphthalene Dibenzofuran 1,1-BiphenylPercent Concentration DecreaseMW-57MW-58Pore volume displacement = 15% Notes:% - percent PWR - Partially Weathered RockNo concentration decrease was observed for dibenzofuran in MW-58 and for 1,1-biphenyl in both MW-57 and MW-58Comparison of Week 2 to Month 1 Concentration Decrease to Pore Volume DisplacementPWR Zone - Holcomb Creosote SiteMarch 2022Figure 4.60%20%40%60%80%100%120%Naphthalene Acenaphthene 2-Methylnaphthalene Dibenzofuran 1,1-BiphenylPercent Concentration DecreaseMW-57MW-58Pore volume displacement = 24% APPENDIX A WELL INSTALL AND SAMPLING FIELD FORMS APPENDIX B ISCO INJECTION FORMS AND LOGS Field Summary Report for Holcomb Creosote Company in Yadkinville, North Carolina Summary of Events for Holcomb Creosote Company MFR injections Redox Tech was tasked with injecting into 4 wells (INJ-01, INJ-02, INJ-03, and INJ-04) located at the former Holcomb Creosote Company in Yadkinville, NC. Each well was screened from 33-23 ft bgs and had glued on 2” PVC pipe to NPT thread adapters. This was supposed to be a two-event project separated by roughly 2 weeks. Redox Tech mobilized to the site on August 18th, and accepted forklift and air compressor rentals, along with chemicals for the first event. Redox Tech also had a 4,000-gallon pillow tank that was filled up via a large water tanker for use on the project. Redox Tech used a 250-gallon IBC tote to mix the chemicals together. Water was first pumped from the pillow tank to the IBC tote, and then 34% wt hydrogen peroxide was added by using the forklift on site to lift the hydrogen peroxide tote above the mixing tote then drain the required volume through a 2” cam lock hose that was fed into the top of the mixing tote, by visually looking at the marks on the front of the tote to indicate the volume remaining in the hydrogen peroxide tote. The first batch was mixed to the original scope of the project, for 8.4% solution of hydrogen peroxide. The mix tote held 184 gallons of water, and then 54 gallons of 34 wt% hydrogen peroxide was added as well as 2 lbs of sodium citrate to create the 8.4% solution. Once mixed, the solution was then pumped into individual wells using a 2” ARO double diaphragm pump. By adjusting the air Prepared by Zachary Poole on September 9th, 2021 Field Contractor Redox Tech, LLC Client HGL/Geosyntec Field Lead Zachary Poole Field Lead Mike Burcham Phone Number 919-920-3641 Phone Number 321-960-9789 Email Address poole@redox- tech.com Email Address mburcham@geosyntec.co m Start Date August 18th, 2021 End Date September 2nd, 2021 Chemical MFR (Hydrogen Peroxide at 8.4% wt solution, followed by ferrous sulfate injection) Injection Points 4 wells screened from 23-33 ft bgs. pressure to the pump using a regulator, we were able to control the injection flow rate. An inline pressure gauge allowed us to determine and regulate injection pressure going into the well. INJ-02 was the first well to receive the amendment. We first injected ~15 gallons of water and then followed that immediately with the hydrogen peroxide solution. Injections started off as slowly as possible by keeping the air pressure regulator on the pump as low as possible yet allowing the pump to operate. From initially slow flow rates, the air pressure regulator was increased until a flow rate of ~0.9 gallons per minute was achieved, and at this observed flow rate, the observed injection pressures for this well were relatively high (around 40-45 psi). Injections continued at INJ-02 for just over 2 hours, which received ~113 gallons of solution, before switching to the next well, INJ-04. INJ-04 took ~40 gallons of solution before amendment surfaced at a point between all the injection and monitoring wells. Final injection pressure was observed to be 40 psi, and the flow rate was observed to be ~6.7 gallons per minute. INJ-01 took ~25 gallons of solution before it also surfaced at the same location that INJ-04 surfaced at. The injection pressure observed at INJ-01 was 20 psi, and the flow rate observed was ~3.6 gallons per minute. Finally INJ-03 received ~25 gallons of solution as well before it surfaced around a nearby old monitoring well. The observed injection pressure for INJ-03 was 10 psi, with an observed flow rate of ~1.6 gallons per minute. After observing injections in all four wells, it became apparent that only INJ-02 was able to receive a reasonable amount of solution without surfacing. Since we had some remaining solution left from the first batch of 8.4% wt solution that had been mixed up, the remaining solution was injected into INJ-02, and then flushed with ~20 gallons of water at the end of the day. Refer to the attached injection data for more detailed information. The following day, the original plan was modified to test how the wells would do at half the concentration (~4.2% wt) of the hydrogen peroxide solution. Injections began with the 4.2% wt hydrogen peroxide and 2 lbs of sodium citrate into INJ-02 to complete the remaining volume that was initially set out in the scope, 238 gallons of hydrogen peroxide solution. The injection pressure at INJ-02 was observed to be about the same as the day before, ~40-45 psi, and the observed flow rate was ~0.7 gallons per minute. INJ-02 then received ~10 gallons of flush water, and then followed up with 119 gallons of ferrous sulfate solution. The injection pressure observed during this solution injection was 40 psi, and the flow rate was noticeably faster, as observed to be ~6.3 gallons per minute. The rest of the day was spent testing the other three injection wells to see how they would respond to the lower concentration of hydrogen peroxide. The three injection wells received nearly the same volumes into each well before they surfaced again in the same locations as the day before. While injecting into INJ-04, it was observed that the 4.2% wt solution had made its way around the MW-57 casing and filled the stick-up vault with the bubbly peroxide solution. There was some solution remaining after testing the other 3 wells, and that volume was injected into INJ-02 to get rid of all mixed peroxide solution. It was observed that this last injection into INJ-02 was seen to have a faster flow rate of ~4.2 gallons per minute at an observed injection pressure of 10 psi. This concluded the first injection event at the Holcomb Creosote Company. All rentals were called off rent, all trash was collected and disposed of off-site, and all equipment was packed up except the pillow tank and one tote of 34% hydrogen peroxide that had 100 gallons remaining in it, and the crew demobed on August 19th, 2021. On August 27th, a conference call was held to discuss the next injection event at site, and it was decided to try a 0.5% wt hydrogen peroxide solution into each well and see if injections could be completed. The start of this event would be to see if gravity feeding into the wells was a viable option, and if not, then switch to a pump. Using a two-way manifold and injecting into two wells at the same time was also discussed to see if that had any effect to get more product into the ground. Redox Tech, Geosyntec, and HGL representatives mobilized back to site on September 2nd to try to get more information about the site as discussed on the conference call on August 27th. Manifolded injections began in INJ-01 and INJ-03 by gravity feeding water, and then following that by gravity feeding 0.5% wt hydrogen peroxide solution. Injections into INJ-03 caused surfacing after ~38 gallons of solution in the same location as the first event. INJ-01 took ~29 gallons of solution before it stalled. The diaphragm pump was then turned on to continue injections. INJ-01 received ~42 gallons of solution before it surfaced in the same location as the first event. Gravity feed injections were then started at INJ-04. After ~35 minutes, INJ-04 received ~29 gallons of solution, and appeared to have slowed down significantly to a point where the flow rate was less than 0.2 gallons per minute. The pump was turned on to continue injections, and it was noticed that INJ-04 started to fill up the vault again at MW-57. After injecting into INJ-01, INJ-03, and INJ-04 and realizing that the 0.5% wt solution had little effect on whether we could get more solution into the ground, it was decided to inject the remaining volume of 357 gallons as per the original scope of the project, into INJ-02. Injections were completed with the diaphragm pump. The observed injection pressure was 20 psi, and the average flow rate for the well for the entire volume was observed as ~2.5 gallons per minute. For more details regarding injections, please refer to the attached spreadsheet that contains all injection data. This concluded the second event of injections for the Holcomb Creosote Company site. All remaining chemical and equipment was packed up and carried back to the Redox Tech’s shop in Cary. All trash was collected and disposed of offsite. And all rental equipment was fueled up and called off rent. HGL, Geosyntec and Redox Tech, personnel demobed from site on September 2nd, 2021 Figure 1. Location of Injection Wells located at the Holcomb Creosote Company Figure 2. Pictures of Amendment Surfacing Figure 2.A Surfacing from INJ-01, in center area of the wells Figure 2.B MW-57 stick-up vault filling up with Amendment from INJ-04 Figure 2.C Surfacing in center area of wells from INJ-01 second time. Figure 2.D Surfacing next to old monitoring well, around the casing, from INJ-03 Location:Chemical: Date:Concentration: Redox Tech Crew Pump: Note Taker: Date Injection Point Depth Mix / Batch Number Start Time Stop Time Injection Pressure (PSI)Flow Rate GPM Planned Volume Injected Actual Volume Injected Notes (flow change, etc.) 8/18/2021 INJ-02 23-33 1 11:31 11:34 35 5.0 15 15 flush water 8/18/2021 INJ-02 23-33 1 11:41 13:51 35 0.9 238 113 8.4% wt h2o2, ~2lbs sodium citrate, increased injection pressure to 40 psi at 12:43, volume mark around 200 gallons. tightened cap on MW-57. stopped injections, will put remaining 125 gallons into INJ-4, then come back and put aome ferrous sulfate mox into well 8/18/2021 INJ-04 23-33 1 14:32 14:38 40 6.7 238 40 8.4% wt h2o2, ~2lbs sodium citrate, surfacing 10ft away between monitoring wells 8/18/2021 INJ-01 23-33 1 14:59 15:06 20 3.6 238 25 8.4% wt h2o2, ~2lbs sodium citrate, surfacing at same spot as INJ-4 8/18/2021 INJ-03 23-33 1 15:20 15:36 10 1.6 238 25 8.4% wt h2o2, ~2lbs sodium citrate, surfacing 8/18/2021 INJ-02 23-33 1 16:47 17:25 40 0.9 35 35 8.4% wt h2o2, ~2lbs sodium citrate. remaining volume of first mix tote, inject to get rid of solution 8/18/2021 INJ-02 23-33 2 17:40 18:24 40 0.5 20 20 flush water 8/19/2021 INJ-02 23-33 2 8:35 10:43 40 0.7 90 90 4.2% H2O2 solution, ~2lbs of sodium citrate 8/19/2021 INJ-02 23-33 3 10:53 10:57 40 2.5 10 10 flush water 8/19/2021 INJ-02 23-33 3 10:57 11:16 40 6.3 119 119 1lb ferrous sulfate 8/19/2021 INJ-04 23-33 4 11:34 11:40 10 2.5 45 15 4.2% H2O2 solution, ~2lbs of sodium, citrate, surfaced around MW-57 casing 8/19/2021 INJ-01 23-33 4 11:55 11:58 10 10.0 30 30 4.2% H2O2 solution, ~2lbs of sodium, citrate, aurfaced in middle as before 8/19/2021 INJ-03 23-33 5 13:13 13:23 10 1.0 45 10 4.2% H2O2 solution, ~2lbs of sodium citrate, have ball valve at injection head barely open to reduce flow rate, surfaced around old MW 8/19/2021 INJ-01 23-33 5 13:31 13:36 10 2.0 35 10 4.2% H2O2 solution, ~2lbs of sodium citrate, surfaced in center between all the wells 8/19/2021 INJ-02 23-33 5 13:41 13:47 10 4.2 25 25 4.2% H2O2 solution, ~2lbs of sodium citrate 8/19/2021 INJ-02 23-33 6 13:54 14:11 10 0.6 10 10 flush water 9/2/2021 INJ-01 23-33 7 9:29 9:31 2.5 5 water 9/2/2021 INJ-03 23-33 7 9:29 9:31 2.5 5 water 9/2/2021 INJ-01 23-33 7 9:36 10:31 0.5 29 0.5% H2O3 Solution, started with gravity feed 9/2/2021 INJ-03 23-33 7 9:36 10:06 1.3 37.5 0.5% H2O3 Solution, startwd with gravity, feed, surfaced 9/2/2021 INJ-01 23-33 7 10:34 10:38 10 1.1 4.5 0.5% H2O2 solution, pump on. 9/2/2021 INJ-01 23-33 8 10:59 11:03 10 2.1 8.25 0.5% H2O2 solution, pump on. surfaced in center 9/2/2021 INJ-04 23-33 8 11:09 11:44 0.8 29 0.5% H2O2 solution, gravity feed 9/2/2021 INJ-04 23-33 8 11:44 11:45 10 4.0 4 0.5% H2O2 solution, pump on. started filling up the vault around MW-57 Redox Tech, LLC Field Injection Log Page No. 1 Zack Poole Injection Trailer: None 2" Aro Double Diaphragm Yadkinville, NC 8/18/2021 & 9/02/2021 Zack Poole, Geoff Ives, and Pat Anderson MFR 8.4%, 4.2% and 0.5% wt solutions 9/2/2021 INJ-04 23-33 8 11:55 11:58 1.3 4 0.5% H2O2 solution, gravity feed, dirext from tote to well head, raised tote up about 5 ft in air with forklift, filled and overflowed MW-57 vault 9/2/2021 INJ-01 23-33 8 12:00 12:05 1.1 5.3 0.5% H2O2 solution, gravity feed, dirext from tote to well head, raised tote uo about 5 ft in air with forklift, surfaced inncenter again 9/2/2021 INJ-02 23-33 8 12:14 12:17 1.3 3.9 0.5% H2O2 solution, gravity feed 9/2/2021 INJ-02 23-33 8 12:18 12:21 20 2.4 7.1 0.5% H2O2 solution, with pump on 9/2/2021 INJ-02 23-33 9 12:34 13:34 20 2.3 140 0.5% H2O2 solution, with pump on 9/2/2021 INJ-02 23-33 9 13:44 14:46 20 2.3 140 0.5% H2O2 solution, with pump on 9/2/2021 INJ-02 23-33 9 14:54 15:14 20 3.9 77 0.5% H2O2 solution, with pump on APPENDIX C INJECTION PHOTOLOG /APP C - ISCO PT PHOTO LOG.DOCX 1 22.02.24 GEOSYNTEC CONSULTANTS Photographic Record Client: HGL Project Number: GR7121 Site Name: Holcomb Creosote Company Site Site Location: Yadkinville, NC Photograph ID: 1 Date: 8/18/2021 Direction: E Comments: ISCO injection area prior to pilot test implementation. Monitoring wells have been completed with well pads and protective casings. Injection wells have been left uncompleted. Photograph ID: 2 Date: 8/18/2021 Direction: NW Comments: ISCO injection area during the first MFR injections. Injection line is connected to INJ- 2. /APP C - ISCO PT PHOTO LOG.DOCX 2 22.02.24 GEOSYNTEC CONSULTANTS Photographic Record Client: HGL Project Number: GR7121 Site Name: Holcomb Creosote Company Site Site Location: Yadkinville, NC Photograph ID: 3 Date: 8/20/2021 Direction: NE Comments: Injection equipment for the first MFR injections. This includes a 250-gal tote for hydrogen peroxide dosing, diaphragm pump for injections, and air compressor for the pump. Photograph ID: 4 Date: 8/18/2021 Direction: N/A Comments: Material information for hydrogen peroxide used during MFR injections. /APP C - ISCO PT PHOTO LOG.DOCX 3 22.02.24 GEOSYNTEC CONSULTANTS Photographic Record Client: HGL Project Number: GR7121 Site Name: Holcomb Creosote Company Site Site Location: Yadkinville, NC Photograph ID: 5 Date: 8/21/2021 Direction: SE Comments: Daylighting that occurred during the first MFR injections at INJ-4. Photograph ID: 6 Date: 8/20/2021 Direction: N/A Comments: Monitoring well MW-3 monitored during the first MFR injection event. Water within the outer casing rose during injections, which appeared to be related to general groundwater mounding. /APP C - ISCO PT PHOTO LOG.DOCX 4 22.02.24 GEOSYNTEC CONSULTANTS Photographic Record Client: HGL Project Number: GR7121 Site Name: Holcomb Creosote Company Site Site Location: Yadkinville, NC Photograph ID: 7 Date: 8/20/2021 Direction: SE Comments: Actively injecting into INJ-2 during the first MFR injection. Daylighting was not observed when injecting in INJ-2. Photograph ID: 8 Date: 8/20/2021 Direction: S Comments: Site conditions after breaking down and demobilizing from first MFR injection event. /APP C - ISCO PT PHOTO LOG.DOCX 5 22.02.24 GEOSYNTEC CONSULTANTS Photographic Record Client: HGL Project Number: GR7121 Site Name: Holcomb Creosote Company Site Site Location: Yadkinville, NC Photograph ID: 9 Date: 9/2/2021 Direction: N/A Comments: Manifold used for second MFR injection event. Photograph ID: 10 Date: 9/2/2021 Direction: S Comments: Injection area during the second MFR injection event. Injections occurring at INJ-1. /APP C - ISCO PT PHOTO LOG.DOCX 6 22.02.24 GEOSYNTEC CONSULTANTS Photographic Record Client: HGL Project Number: GR7121 Site Name: Holcomb Creosote Company Site Site Location: Yadkinville, NC Photograph ID: 11 Date: 9/2/2021 Direction: N/A Comments: Diaphragm pump used for injections during the second MFR injection event. Photograph ID: 12 Date: 9/2/2021 Direction: SW Comments: Injection area during second MFR injection event. Minor daylighting has occurred within the center of the injection area. /APP C - ISCO PT PHOTO LOG.DOCX 7 22.02.24 GEOSYNTEC CONSULTANTS Photographic Record Client: HGL Project Number: GR7121 Site Name: Holcomb Creosote Company Site Site Location: Yadkinville, NC Photograph ID: 13 Date: 9/15/2021 Direction: SW Comments: Injection area set up during the sodium permanganate injections. Injection manifold is visible, and injection lines are connected to INJ-1 and INJ-3. Photograph ID: 14 Date: 9/15/2021 Direction: N/A Comments: Material information for sodium permanganate used during ISCO pilot test. /APP C - ISCO PT PHOTO LOG.DOCX 8 22.02.24 GEOSYNTEC CONSULTANTS Photographic Record Client: HGL Project Number: GR7121 Site Name: Holcomb Creosote Company Site Site Location: Yadkinville, NC Photograph ID: 15 Date: 9/15/2021 Direction: N/A Comments: Neutralizing material (hydrogen peroxide, vinegar) that was used when sodium permanganate leaked or daylighted at the surface. Photograph ID: 16 Date: 9/15/2021 Direction: SE Comments: GEX applying neutralizing solution to diluted sodium permanganate solution that daylighted during injections. /APP C - ISCO PT PHOTO LOG.DOCX 9 22.02.24 GEOSYNTEC CONSULTANTS Photographic Record Client: HGL Project Number: GR7121 Site Name: Holcomb Creosote Company Site Site Location: Yadkinville, NC Photograph ID: 17 Date: 9/16/2021 Direction: E Comments: GEX pushing DPT injection tooling to depth at DPT- 13. Photograph ID: 18 Date: 9/16/2021 Direction: N/A Comments: Injection well head attached to the DPT-13 DPT tooling. APPENDIX D SOIL BORING LOGS APPENDIX E WELL CONSTRUCTION LOGS WELL CAP SECURITY CASING CASING LENGTH ABOVE GROUND SURFACE DIMENSION OF CONCRETE PAD GROUND SURFACE (REFERENCE POINT) DEPTH TO TOP OF BENTONITE SEAL DEPTH TO TOP OF FILTER PACK DEPTH TO TOP OF SCREEN END CAP DEPTH TO BASE OF WELL BOREHOLE DEPTH SCREENLENGTH SAND CELLARLENGTH GROUT BENTONITE SEAL FILTER PACK LEGEND SPECIAL CONDITIONS (describe and draw) NOT TO SCALE WELL CONSTRUCTION FORM (STANDARD WELL) FIELD REPRESENTATIVE: ________________________ TYPE OF FILTER PACK: ____________________________ GRADIATION: ____________________________________ ___________________ DRILLING TECHNIQUE: __________________________ TYPE OF BENTONITE: _____________________________ AUGER SIZE AND TYPE: __________________________ AMOUNT BENTONITE USED: ______________________ BOREHOLE IDENTIFICATION: _____________________ TYPE OF CEMENT: _________________________________ BOREHOLE DIAMETER: ___________________________ AMOUNT CEMENT USED: _________________________ WELL IDENTIFICATION: __________________________ WELL CONSTRUCTION START DATE: ______________ WELL CONSTRUCTION COMPLETE DATE: __________ DIMENSIONS OF SECURITY CASING: _______________ SCREEN MATERIAL: ______________________________ TYPE OF WELL CAP: ______________________________ SCREEN DIAMETER: ______________________________ TYPE OF END CAP: _______________________________ STRATUM-SCREENED INTERVAL (FT): _____________ COMMENTS: CASING MATERIAL: ______________________________ CASING DIAMETER: ______________________________ Page 1 of 6 Justin Hobart (Geosyntec Consultants) Linda Nyland (HGL) Geologic Exploration, Inc. Sonic Mud Rotary 6-inch diameter hollow-stem MW-57 6 inchesMW-57 7/26/2021 7/30/2021 Schedule 40 PVC 0.010 inches 10 feet Schedule 40 PVC 2 inches GP-1 sand (Southern Products & Silica Co.) --- DRILLING CONTRACTOR: _ ____ AMOUNT OF FILTER PACK USED: __________________ 3/8-inch diameter coarse-grade (Holeplug) 2-3 bags --- GROUT MATERIAL USED: __________________________ ~0.3 x 0.3 x 3 feet Lockable j-plug Schedule 40 PVC sump cap Boring drilled to ~38 ft. Boring back-filled with bentonite from 33-38 ft. INSTALLED BY: ____________________________ INSTALLATION OBSERVED BY: ___Justin Hobart (Geosyntec Consultants)__________________________ DISCREPANCIES: _______________________________________________________________________________________ Neat cement Neat cement 23 ft 22 ft 19 ft 10 ft ~ 0.25 ft 38 ft 33 ft 2 ft x 2 ft ~ 3 ft Brandon Doty ~ 4 bags WELL CAP SECURITY CASING CASING LENGTH ABOVE GROUND SURFACE DIMENSION OF CONCRETE PAD GROUND SURFACE (REFERENCE POINT) DEPTH TO TOP OF BENTONITE SEAL DEPTH TO TOP OF FILTER PACK DEPTH TO TOP OF SCREEN END CAP DEPTH TO BASE OF WELL BOREHOLE DEPTH SCREENLENGTH SAND CELLARLENGTH GROUT BENTONITE SEAL FILTER PACK LEGEND SPECIAL CONDITIONS (describe and draw) NOT TO SCALE WELL CONSTRUCTION FORM (STANDARD WELL) FIELD REPRESENTATIVE: ________________________ TYPE OF FILTER PACK: ____________________________ GRADIATION: ____________________________________ ___________________ DRILLING TECHNIQUE: __________________________ TYPE OF BENTONITE: _____________________________ AUGER SIZE AND TYPE: __________________________ TYPE OF CEMENT: _________________________________ BOREHOLE DIAMETER: ___________________________ AMOUNT CEMENT USED: _________________________ WELL IDENTIFICATION: __________________________ WELL CONSTRUCTION START DATE: _______ WELL CONSTRUCTION COMPLETE DATE: __________ DIMENSIONS OF SECURITY CASING: _______________ SCREEN MATERIAL: ______________________________ TYPE OF WELL CAP: ______________________________ SCREEN DIAMETER: ______________________________ TYPE OF END CAP: _______________________________ STRATUM-SCREENED INTERVAL (FT): _____________ COMMENTS: CASING MATERIAL: ______________________________ CASING DIAMETER: ______________________________ Page 2 of 6 Justin Hobart (Geosyntec Consultants) Linda Nyland (HGL) Geologic Exploration, Inc. Sonic Mud Rotary 6-inch diameter hollow-stem BOREHOLE IDENTIFICATION:______________________ 6 inchesMW-58 7_/27/2021______ 7/30/2021 Schedule 40 PVC 0.010 inches 10 feet Schedule 40 PVC 2 inches GP-1 sand (Southern Products & Silica Co.) --- DRILLING CONTRACTOR: _ ____ AMOUNT OF FILTER PACK USED: __________________ 3/8-inch diameter coarse-grade (Holeplug) AMOUNT BENTONITE USED: _______________________ --- GROUT MATERIAL USED: __________________________ ~0.3 x 0.3 x 3 feet Lockable j-plug Schedule 40 PVC sump cap INSTALLED BY: ____________________________ INSTALLATION OBSERVED BY: ___Justin Hobart (Geosyntec Consultants)__________________________ DISCREPANCIES: _______________________________________________________________________________________ Neat cement Neat cement 23 ft 22 ft 19 ft 10 ft ~ 0.25 ft 33 ft ~ 32.75 ft 2 ft x 2 ft ~ 3 ft Brandon Doty MW-58 1 bag ~ 4 bags WELL CAP SECURITY CASING CASING LENGTH ABOVE GROUND SURFACE DIMENSION OF CONCRETE PAD GROUND SURFACE (REFERENCE POINT) DEPTH TO TOP OF BENTONITE SEAL DEPTH TO TOP OF FILTER PACK DEPTH TO TOP OF SCREEN END CAP DEPTH TO BASE OF WELL BOREHOLE DEPTH SCREENLENGTH SAND CELLARLENGTH GROUT BENTONITE SEAL FILTER PACK LEGEND SPECIAL CONDITIONS (describe and draw) NOT TO SCALE WELL CONSTRUCTION FORM (STANDARD WELL) GRADIATION: ____________________________________ ___________________ DRILLING TECHNIQUE: __________________________ TYPE OF BENTONITE: _____________________________ ______ WELL IDENTIFICATION: __________________________ WELL CONSTRUCTION COMPLETE DATE: __________ DIMENSIONS OF SECURITY CASING: _______________ SCREEN MATERIAL: ______________________________ TYPE OF WELL CAP: ______________________________ SCREEN DIAMETER: ______________________________ TYPE OF END CAP: _______________________________ STRATUM-SCREENED INTERVAL (FT): _____________ COMMENTS: CASING MATERIAL: ______________________________ CASING DIAMETER: ______________________________ Page 3 of 6 Justin Hobart (Geosyntec Consultants) FIELD REPRESENTATIVE: ________________________ Linda Nyland (HGL) TYPE OF FILTER PACK: _ Geologic Exploration, Inc. Sonic Mud Rotary AUGER SIZE AND TYPE: __________________________6-inch diameter hollow-stem BOREHOLE IDENTIFICATION:__________________ 6 inchesINJ-1 WELL CONSTRUCTION START DATE: ____________________________ Schedule 40 PVC 0.010 inches 10 feet Schedule 40 PVC 2 inches ___________________________GP-1 sand (Southern Products & Silica Co.) --- DRILLING CONTRACTOR: _ ____ AMOUNT OF FILTER PACK USED: __________________ 3/8-inch diameter coarse-grade (Holeplug) BOREHOLE DIAMETER: ___ __________________ AMOUNT CEMENT USED: ---_________________________ ~0.3 x 0.3 x 3 feet Lockable j-plug Schedule 40 PVC sump cap INSTALLED BY: ____________________________ INSTALLATION OBSERVED BY: ___Justin Hobart (Geosyntec Consultants)__________________________ DISCREPANCIES: _______________________________________________________________________________________ TYPE OF CEMENT: ___________Neat cement_____________________ GROUT MATERIAL USED: Neat cement__________________________ 23 ft 22ft 19 ft 10 ft ~ 0.25 ft 33 ft ~ 32.75 ft 2 ft x 2 ft ~ 3 ft Brandon Doty INJ-____1 AMOUNT BENTONITE USED: ______________________ ~ 4 bags ____7/28/2021___ --- Riser pipe and casing materials installed 7/28/2021 through 7/30/21. Security casing and well pad installed within the following weeks. 1 bag WELL CAP SECURITY CASING CASING LENGTH ABOVE GROUND SURFACE DIMENSION OF CONCRETE PAD GROUND SURFACE (REFERENCE POINT) DEPTH TO TOP OF BENTONITE SEAL DEPTH TO TOP OF FILTER PACK DEPTH TO TOP OF SCREEN END CAP DEPTH TO BASE OF WELL BOREHOLE DEPTH SCREENLENGTH SAND CELLARLENGTH GROUT BENTONITE SEAL FILTER PACK LEGEND SPECIAL CONDITIONS (describe and draw) NOT TO SCALE WELL CONSTRUCTION FORM (STANDARD WELL) GRADIATION: ____________________________________ ___________________ DRILLING TECHNIQUE: __________________________ TYPE OF BENTONITE: _____________________________ ______ WELL IDENTIFICATION: __________________________ SCREEN DIAMETER: ______________________________ TYPE OF END CAP: _______________________________ STRATUM-SCREENED INTERVAL (FT): _____________ COMMENTS: CASING MATERIAL: ______________________________ CASING DIAMETER: ______________________________ Page 4 of 6 Justin Hobart (Geosyntec Consultants) FIELD REPRESENTATIVE: ________________________ Linda Nyland (HGL) TYPE OF FILTER PACK: _ Geologic Exploration, Inc. Sonic Mud Rotary AUGER SIZE AND TYPE: __________________________6-inch diameter hollow-stem 6 inchesINJ-2 0.010 inches 10 feet Schedule 40 PVC 2 inches ___________________________GP-1 sand (Southern Products & Silica Co.) --- DRILLING CONTRACTOR: _ ____ AMOUNT OF FILTER PACK USED: __________________ 3/8-inch diameter coarse-grade (Holeplug) BOREHOLE DIAMETER: ___ __________________ AMOUNT CEMENT USED: ---_________________________ Schedule 40 PVC sump cap INSTALLED BY: ____________________________ INSTALLATION OBSERVED BY: ___Justin Hobart (Geosyntec Consultants)__________________________ DISCREPANCIES: _______________________________________________________________________________________ TYPE OF CEMENT: ___________Neat cement_____________________ GROUT MATERIAL USED: Neat cement__________________________ 23 ft 22 ft 19 ft 10 ft ~ 0.25 ft 33 ft ~ 32.75 ft 2 ft x 2 ft ~ 3 ft Brandon Doty BOREHOLE IDENTIFICATION:_______________________________________INJ-2 AMOUNT BENTONITE USED: ______________________ ~ 4 bags WELL CONSTRUCTION START DATE: ____________________________ WELL CONSTRUCTION COMPLETE DATE: _ ---_________ DIMENSIONS OF SECURITY CASING: _______________~0.3 x 0.3 x 3 feet Schedule 40 PVC____________SCREEN MATERIAL: ___ _______________ TYPE OF WELL CAP: Lockable j-plug______________________________ Riser pipe and casing materials installed 7/27/2021 through 7/30/21. Security casing and well pad installed within the following weeks. 1 bag 7/27/2021 WELL CAP SECURITY CASING CASING LENGTH ABOVE GROUND SURFACE DIMENSION OF CONCRETE PAD GROUND SURFACE (REFERENCE POINT) DEPTH TO TOP OF BENTONITE SEAL DEPTH TO TOP OF FILTER PACK DEPTH TO TOP OF SCREEN END CAP DEPTH TO BASE OF WELL BOREHOLE DEPTH SCREENLENGTH SAND CELLARLENGTH GROUT BENTONITE SEAL FILTER PACK LEGEND SPECIAL CONDITIONS (describe and draw) NOT TO SCALE WELL CONSTRUCTION FORM (STANDARD WELL) GRADIATION: ____________________________________ ___________________ DRILLING TECHNIQUE: __________________________ TYPE OF BENTONITE: _____________________________ ______ WELL IDENTIFICATION: __________________________ SCREEN DIAMETER: ______________________________ TYPE OF END CAP: _______________________________ STRATUM-SCREENED INTERVAL (FT): _____________ COMMENTS: CASING MATERIAL: ______________________________ CASING DIAMETER: ______________________________ Page 5 of 6 Justin Hobart (Geosyntec Consultants) FIELD REPRESENTATIVE: ________________________ Linda Nyland (HGL) TYPE OF FILTER PACK: _ Geologic Exploration, Inc. Sonic Mud Rotary AUGER SIZE AND TYPE: __________________________6-inch diameter hollow-stem 6 inchesINJ-3 0.010 inches 10 feet Schedule 40 PVC 2 inches ___________________________GP-1 sand (Southern Products & Silica Co.) --- DRILLING CONTRACTOR: _ ____ AMOUNT OF FILTER PACK USED: __________________ 3/8-inch diameter coarse-grade (Holeplug) BOREHOLE DIAMETER: ___ __________________ AMOUNT CEMENT USED: ---_________________________ Schedule 40 PVC sump cap INSTALLED BY: ____________________________ INSTALLATION OBSERVED BY: ___Justin Hobart (Geosyntec Consultants)__________________________ DISCREPANCIES: _______________________________________________________________________________________ TYPE OF CEMENT: ___________Neat cement_____________________ GROUT MATERIAL USED: Neat cement__________________________ 23 ft 22 ft 16 ft 10 ft ~ 0.25 ft 33 ft ~ 32.75 ft 2 ft x 2 ft ~ 3 ft Brandon Doty BOREHOLE IDENTIFICATION:_______________________________________ ~ 4 bags WELL CONSTRUCTION START DATE: _____________ WELL CONSTRUCTION COMPLETE DATE: _ ---_________ DIMENSIONS OF SECURITY CASING: _______________~0.3 x 0.3 x 3 feet Schedule 40 PVC____________SCREEN MATERIAL: ___ _______________ TYPE OF WELL CAP: Lockable j-plug______________________________ Riser pipe and casing materials installed 7/27/2021 through 7/30/21. Security casing and well pad installed within the following weeks. Potential filter pack blow-out sand observed at ~19-20 ft from boring soil. Bentonite installed from 16-22 ft. AMOUNT BENTONITE USED: _______________________ 7_____/29/2021__________ INJ-3 2 bags WELL CAP SECURITY CASING CASING LENGTH ABOVE GROUND SURFACE DIMENSION OF CONCRETE PAD GROUND SURFACE (REFERENCE POINT) DEPTH TO TOP OF BENTONITE SEAL DEPTH TO TOP OF FILTER PACK DEPTH TO TOP OF SCREEN END CAP DEPTH TO BASE OF WELL BOREHOLE DEPTH SCREENLENGTH SAND CELLARLENGTH GROUT BENTONITE SEAL FILTER PACK LEGEND SPECIAL CONDITIONS (describe and draw) NOT TO SCALE WELL CONSTRUCTION FORM (STANDARD WELL) FIELD REPRESENTATIVE: ________________________ TYPE OF FILTER PACK: ____________________________ GRADIATION: ____________________________________ ___________________ DRILLING TECHNIQUE: __________________________ TYPE OF BENTONITE: _____________________________ TYPE OF CEMENT: _________________________________ BOREHOLE DIAMETER: ___________________________ AMOUNT CEMENT USED: _________________________ WELL IDENTIFICATION: __________________________ WELL CONSTRUCTION COMPLETE DATE: __________ DIMENSIONS OF SECURITY CASING: _______________ SCREEN MATERIAL: ______________________________ TYPE OF WELL CAP: ______________________________ SCREEN DIAMETER: ______________________________ TYPE OF END CAP: _______________________________ STRATUM-SCREENED INTERVAL (FT): _____________ COMMENTS: CASING MATERIAL: ______________________________ CASING DIAMETER: ______________________________ Page 6 of 6 Justin Hobart (Geosyntec Consultants) Linda Nyland (HGL) Geologic Exploration, Inc. Sonic Mud Rotary AUGER SIZE AND TYPE: __________________________6-inch diameter hollow-stem BOREHOLE IDENTIFICATION:______________________ 6 inchesINJ-4 WELL CONSTRUCTION START DATE: ______ _______ Schedule 40 PVC 0.010 inches 10 feet Schedule 40 PVC 2 inches GP-1 sand (Southern Products & Silica Co.) --- DRILLING CONTRACTOR: _ ____ AMOUNT OF FILTER PACK USED: __________________ 3/8-inch diameter coarse-grade (Holeplug) --- GROUT MATERIAL USED: __________________________ ~0.3 x 0.3 x 3 feet Lockable j-plug Schedule 40 PVC sump cap INSTALLED BY: ____________________________ INSTALLATION OBSERVED BY: ___Justin Hobart (Geosyntec Consultants)__________________________ DISCREPANCIES: _______________________________________________________________________________________ Neat cement Neat cement 23 ft 23ft 16 ft 10 ft ~ 0.25 ft 33 ft ~ 32.75 ft 2 ft x 2 ft ~ 3 ft Brandon Doty INJ-4 AMOUNT BENTONITE USED: 2 bag__________s_____________ ~ 4 bags 7/____28_______________/2021___ --- Riser pipe and casing materials installed 7/28/2021 through 7/30/21. Security casing and well pad installed within the following weeks. Potential blow-out filter pack sand observed in boring soils from ~19-20 ft and PWR interpreted at 22 ft; therefore bentonite was placed from 17-23 ft. APPENDIX F LABORATORY ANALYTICAL REPORTS D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Laura Ackerman August 24, 2021 MEMORANDUM SUBJECT: FROM: FINAL Analytical Report Project: 21-0304, Holcomb Creosote Laura Ackerman LSB Inorganic Chemistry Section Chief Laboratory Services Branch John Deatrick, ChiefTHRU: TO:Joydeb Majumder Attached are the final results for the analytical groups listed below. This report shall not be reproduced except in full without approval of the Region 4 laboratory. These analyses were performed in accordance with the Laboratory Services Branch's Laboratory Operations and Quality Assurance Manual (LSB LOQAM) found at www.epa.gov/region4/sesd/asbsop. Any unique project data quality objectives specified in writing by the data requestor have also been incorporated into the data unless otherwise noted in the Report Narrative. Chemistry data have been verified based on the LSB LOQAM specifications and have been qualified by this laboratory if the applicable quality control criteria were not met. Verification is defined in Chapter 5 of the LSB LOQAM. For a listing of specific data qualifiers and explanations, please refer to the Data Qualifier Definitions included in this report. The reported results are accurate within the limits of the method(s) and are representative only of the samples as received by the laboratory. Analyses Included in this report:Method Used:Accreditations: Dissolved Metals (DMTL) Dissolved Metals ISOEPA 6010 (Water) Total Metals (TMTL) Total Metals ISOEPA 6010 (Water) 8/24/21 10:13E213107 DMTL TMTL FINAL 08 24 21 1013Page 1 of 15 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Laura Ackerman Sample Disposal Policy Due to limited space for long term sample storage, LSB’s policy is to dispose of samples on a periodic schedule. Air samples collected in summa canisters will be disposed of 30 days following the issuance of this report. All other sample media including original samples, sample extracts and or digestates will be disposed of, in accordance with applicable regulations, 60 days from the date of this report. This sample disposal policy does not apply to criminal samples which are held until the laboratory is notified by the criminal investigators that case development and litigation are complete. These samples may be held in the laboratory's custody for a longer period of time. If samples require storage beyond the 60-day period, please contact the Sample Control Coordinator by e-mail at R4SampleCustody@epa.gov. cc: Nardina Turner 8/24/21 10:13E213107 DMTL TMTL FINAL 08 24 21 1013Page 2 of 15 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Laura Ackerman Date ReceivedDate CollectedMatrixLaboratory IDSample ID SAMPLES INCLUDED IN THIS REPORT Project: 21-0304, Holcomb Creosote MW-2 E213107-01 Groundwater 7/28/21 18:30 7/30/21 10:15 MW-57 E213107-02 Groundwater 7/29/21 14:05 7/30/21 10:15 MW-58 E213107-03 Groundwater 7/29/21 16:35 7/30/21 10:15 MW-6 E213107-04 Groundwater 7/28/21 12:40 7/30/21 10:15 8/24/21 10:13E213107 DMTL TMTL FINAL 08 24 21 1013Page 3 of 15 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Laura Ackerman DATA QUALIFIER DEFINITIONS CR Dissolved>total. RPD is within method allowed precision. ACRONYMS AND ABBREVIATIONS CAS Chemical Abstracts Service Note: Analytes with no known CAS identifiers have been assigned codes beginning with "E", the EPA ID as assigned by the EPA Substance Registry System (www.epa.gov/srs), or beginning with "R4-", a unique identifier assigned by the EPA Region 4 laboratory. MDL Method Detection Limit - The minimum concentration of a substance (an analyte) that can be measured and reported with a 99% confidence that the analyte concentration is greater than zero. MRL Minimum Reporting Limit - Analyte concentration that corresponds to the lowest demonstrated level of acceptable quantitation. The MRL is sample-specific and accounts for preparation weights and volumes, dilutions, and moisture content of soil/sediments. TIC Tentatively Identified Compound - An analyte identified based on a match with the instrument software's mass spectral library. A calibration standard has not been analyzed to confirm the compound's identification or the estimated concentration reported. ACCREDITATIONS: ISO Accredited to ISO/IEC 17025:2017 and accreditation requirements for Forensic Science Testing Laboratories. Refer to the certificate and scope of accreditation FT-0330 at: http://www.epa.gov/aboutepa/about-region-4s-science-and-ecosystem-support-division-sesd NR Not accredited for this test. DW Accredited for conformance with ISO/IEC 17025:2017 and testing elements in the Fifth Edition of the Manual for the Certification of Laboratories Analyzing Drinking Water, EPA 815-R-05-004, 2005. Refer to the certificate and scope of accreditation AT-2628 at: http://www.epa.gov/aboutepa/about-region-4s-science-and-ecosystem-support-division-sesd ISO/DW Accredited to ISO/IEC 17025:2017 and accreditation requirements for Forensic Science Testing Labs, and conformance with ISO/IEC 17025:2017 and testing elements in the Manual for the Certification of Laboratories Analyzing Drinking Water. 8/24/21 10:13E213107 DMTL TMTL FINAL 08 24 21 1013Page 4 of 15 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Laura Ackerman Total Metals Sample ID:Lab ID: MW-2 E213107-01 Matrix:Groundwater Date Collected:7/28/21 18:30 Project: 21-0304, Holcomb Creosote Station ID:MW-2 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 100Ironug/L EPA 6010160007439-89-6 8/12/2112:548/03/2110:55 5.0Manganeseug/L EPA 601029007439-96-5 8/12/2112:548/03/2110:55 8/24/21 10:13E213107 DMTL TMTL FINAL 08 24 21 1013Page 5 of 15 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Laura Ackerman Dissolved Metals Sample ID:Lab ID: MW-2 E213107-01 Matrix:Groundwater Date Collected:7/28/21 18:30 Project: 21-0304, Holcomb Creosote Station ID:MW-2 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 100Ironug/L EPA 6010150007439-89-6 8/12/2112:238/03/2111:19 5.0Manganeseug/L EPA 601029007439-96-5 8/12/2112:238/03/2111:19 8/24/21 10:13E213107 DMTL TMTL FINAL 08 24 21 1013Page 6 of 15 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Laura Ackerman Total Metals Sample ID:Lab ID: MW-57 E213107-02 Matrix:Groundwater Date Collected:7/29/21 14:05 Project: 21-0304, Holcomb Creosote Station ID:MW-57 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 100Ironug/L EPA 601016007439-89-6 8/12/2112:578/03/2110:55 5.0Manganeseug/L EPA 601011007439-96-5 8/12/2112:578/03/2110:55 8/24/21 10:13E213107 DMTL TMTL FINAL 08 24 21 1013Page 7 of 15 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Laura Ackerman Dissolved Metals Sample ID:Lab ID: MW-57 E213107-02 Matrix:Groundwater Date Collected:7/29/21 14:05 Project: 21-0304, Holcomb Creosote Station ID:MW-57 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 100Ironug/L EPA 601012007439-89-6 8/12/2112:268/03/2111:19 5.0Manganeseug/L EPA 601011007439-96-5 8/12/2112:268/03/2111:19 8/24/21 10:13E213107 DMTL TMTL FINAL 08 24 21 1013Page 8 of 15 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Laura Ackerman Total Metals Sample ID:Lab ID: MW-58 E213107-03 Matrix:Groundwater Date Collected:7/29/21 16:35 Project: 21-0304, Holcomb Creosote Station ID:MW-58 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 100Ironug/L EPA 6010150007439-89-6 8/12/2113:008/03/2110:55 5.0Manganeseug/L EPA 601017007439-96-5 8/12/2113:008/03/2110:55 8/24/21 10:13E213107 DMTL TMTL FINAL 08 24 21 1013Page 9 of 15 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Laura Ackerman Dissolved Metals Sample ID:Lab ID: MW-58 E213107-03 Matrix:Groundwater Date Collected:7/29/21 16:35 Project: 21-0304, Holcomb Creosote Station ID:MW-58 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 100Ironug/L EPA 6010140007439-89-6 8/12/2112:348/03/2111:19 5.0Manganeseug/L EPA 601017007439-96-5 8/12/2112:348/03/2111:19 8/24/21 10:13E213107 DMTL TMTL FINAL 08 24 21 1013Page 10 of 15 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Laura Ackerman Total Metals Sample ID:Lab ID: MW-6 E213107-04 Matrix:Groundwater Date Collected:7/28/21 12:40 Project: 21-0304, Holcomb Creosote Station ID:MW-6 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 100Ironug/L EPA 6010110007439-89-6 8/12/2113:088/03/2110:55 5.0Manganeseug/L EPA 601030007439-96-5 8/12/2113:088/03/2110:55 8/24/21 10:13E213107 DMTL TMTL FINAL 08 24 21 1013Page 11 of 15 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Laura Ackerman Dissolved Metals Sample ID:Lab ID: MW-6 E213107-04 Matrix:Groundwater Date Collected:7/28/21 12:40 Project: 21-0304, Holcomb Creosote Station ID:MW-6 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 100Ironug/L EPA 601012000CR7439-89-6 8/12/2112:378/03/2111:19 5.0Manganeseug/L EPA 60103100CR7439-96-5 8/12/2112:378/03/2111:19 8/24/21 10:13E213107 DMTL TMTL FINAL 08 24 21 1013Page 12 of 15 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Laura Ackerman Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Total Metals (TMTL) - Quality Control US-EPA, Region 4, LSASD Batch 2108006 - M 200.2 Metals Water Blank (2108006-BLK1)Prepared: 08/03/21 Analyzed: 08/12/21 EPA 6010 Iron ug/LU100 U Manganese "U 5.0 U LCS (2108006-BS1)Prepared: 08/03/21 Analyzed: 08/12/21 EPA 6010 Iron ug/L5183.0 100 5000.0 85-115104 Manganese "513.76 5.0 500.00 85-115103 Matrix Spike (2108006-MS1)Prepared: 08/03/21 Analyzed: 08/12/21 Source: E213107-03 EPA 6010 Iron ug/L19452100 5000.0 14837 75-12592.3 Manganese "2140.2 5.0 500.00 1668.5 75-12594.3 Matrix Spike Dup (2108006-MSD1)Prepared: 08/03/21 Analyzed: 08/12/21 Source: E213107-03 EPA 6010 Iron ug/L19707100 5000.0 14837 2075-12597.4 1.30 Manganese "2180.5 5.0 500.00 1668.5 2075-125102 1.87 MRL Verification (2108006-PS1)Prepared: 08/03/21 Analyzed: 08/12/21 EPA 6010 Iron ug/L101.99 100 100.00 MRL-270-130102 Manganese "6.1776 5.0 5.0000 MRL-270-130124 8/24/21 10:13E213107 DMTL TMTL FINAL 08 24 21 1013Page 13 of 15 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Laura Ackerman Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Dissolved Metals (DMTL) - Quality Control US-EPA, Region 4, LSASD Batch 2108008 - M 200.2 Metals Water Blank (2108008-BLK1)Prepared: 08/03/21 Analyzed: 08/12/21 EPA 6010 Iron ug/LU100 U Manganese "U 5.0 U LCS (2108008-BS1)Prepared: 08/03/21 Analyzed: 08/12/21 EPA 6010 Iron ug/L5184.4 100 5000.0 85-115104 Manganese "513.92 5.0 500.00 85-115103 Matrix Spike (2108008-MS1)Prepared: 08/03/21 Analyzed: 08/12/21 Source: E213107-02 EPA 6010 Iron ug/L6374.2 100 5000.0 1163.1 75-125104 Manganese "1581.0 5.0 500.00 1097.4 75-12596.7 Matrix Spike Dup (2108008-MSD1)Prepared: 08/03/21 Analyzed: 08/12/21 Source: E213107-02 EPA 6010 Iron ug/L6329.8 100 5000.0 1163.1 2075-125103 0.700 Manganese "1584.7 5.0 500.00 1097.4 2075-12597.5 0.230 MRL Verification (2108008-PS1)Prepared: 08/03/21 Analyzed: 08/12/21 EPA 6010 Iron ug/L111.75 100 100.00 MRL-270-130112 Manganese "7.3099 5.0 5.0000 MRL-2, QR-2 70-130146 8/24/21 10:13E213107 DMTL TMTL FINAL 08 24 21 1013Page 14 of 15 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Laura Ackerman Notes and Definitions for QC Samples U The analyte was not detected at or above the reporting limit. MRL-2 MRL verification for Non-Potable Water matrix QR-2 MRL verification recovery greater than upper control limits. 8/24/21 10:13E213107 DMTL TMTL FINAL 08 24 21 1013Page 15 of 15 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters August 12, 2021 MEMORANDUM SUBJECT: FROM: FINAL Analytical Report Project: 21-0304, Holcomb Creosote Stacie Masters LSB Organic Chemistry Section Chief Laboratory Services Branch John Deatrick, ChiefTHRU: TO:Joydeb Majumder Attached are the final results for the analytical groups listed below. This report shall not be reproduced except in full without approval of the Region 4 laboratory. These analyses were performed in accordance with the Laboratory Services Branch's Laboratory Operations and Quality Assurance Manual (LSB LOQAM) found at www.epa.gov/region4/sesd/asbsop. Any unique project data quality objectives specified in writing by the data requestor have also been incorporated into the data unless otherwise noted in the Report Narrative. Chemistry data have been verified based on the LSB LOQAM specifications and have been qualified by this laboratory if the applicable quality control criteria were not met. Verification is defined in Chapter 5 of the LSB LOQAM. For a listing of specific data qualifiers and explanations, please refer to the Data Qualifier Definitions included in this report. The reported results are accurate within the limits of the method(s) and are representative only of the samples as received by the laboratory. Analyses Included in this report:Method Used:Accreditations: Semi Volatile Organics (SVOA) Semivolatile organic compounds ISOEPA 8270D (Water) 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 1 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Sample Disposal Policy Due to limited space for long term sample storage, LSB’s policy is to dispose of samples on a periodic schedule. Air samples collected in summa canisters will be disposed of 30 days following the issuance of this report. All other sample media including original samples, sample extracts and or digestates will be disposed of, in accordance with applicable regulations, 60 days from the date of this report. This sample disposal policy does not apply to criminal samples which are held until the laboratory is notified by the criminal investigators that case development and litigation are complete. These samples may be held in the laboratory's custody for a longer period of time. If samples require storage beyond the 60-day period, please contact the Sample Control Coordinator by e-mail at R4SampleCustody@epa.gov. cc: Nardina Turner 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 2 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Date ReceivedDate CollectedMatrixLaboratory IDSample ID SAMPLES INCLUDED IN THIS REPORT Project: 21-0304, Holcomb Creosote MW-2 E213107-01 Groundwater 7/28/21 18:30 7/30/21 10:15 MW-57 E213107-02 Groundwater 7/29/21 14:05 7/30/21 10:15 MW-58 E213107-03 Groundwater 7/29/21 16:35 7/30/21 10:15 MW-6 E213107-04 Groundwater 7/28/21 12:40 7/30/21 10:15 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 3 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters DATA QUALIFIER DEFINITIONS U The analyte was not detected at or above the reporting limit. J The identification of the analyte is acceptable; the reported value is an estimate. NJ Presumptive evidence that analyte is present; reported as a tentative identification with an estimated value. Q-2 Result greater than MDL but less than MRL. QL-3 Laboratory Control Spike Precision outside method control limits ACRONYMS AND ABBREVIATIONS CAS Chemical Abstracts Service Note: Analytes with no known CAS identifiers have been assigned codes beginning with "E", the EPA ID as assigned by the EPA Substance Registry System (www.epa.gov/srs), or beginning with "R4-", a unique identifier assigned by the EPA Region 4 laboratory. MDL Method Detection Limit - The minimum concentration of a substance (an analyte) that can be measured and reported with a 99% confidence that the analyte concentration is greater than zero. MRL Minimum Reporting Limit - Analyte concentration that corresponds to the lowest demonstrated level of acceptable quantitation. The MRL is sample-specific and accounts for preparation weights and volumes, dilutions, and moisture content of soil/sediments. TIC Tentatively Identified Compound - An analyte identified based on a match with the instrument software's mass spectral library. A calibration standard has not been analyzed to confirm the compound's identification or the estimated concentration reported. ACCREDITATIONS: ISO Accredited to ISO/IEC 17025:2017 and accreditation requirements for Forensic Science Testing Laboratories. Refer to the certificate and scope of accreditation FT-0330 at: http://www.epa.gov/aboutepa/about-region-4s-science-and-ecosystem-support-division-sesd NR Not accredited for this test. DW Accredited for conformance with ISO/IEC 17025:2017 and testing elements in the Fifth Edition of the Manual for the Certification of Laboratories Analyzing Drinking Water, EPA 815-R-05-004, 2005. Refer to the certificate and scope of accreditation AT-2628 at: http://www.epa.gov/aboutepa/about-region-4s-science-and-ecosystem-support-division-sesd ISO/DW Accredited to ISO/IEC 17025:2017 and accreditation requirements for Forensic Science Testing Labs, and conformance with ISO/IEC 17025:2017 and testing elements in the Manual for the Certification of Laboratories Analyzing Drinking Water. 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 4 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-2 E213107-01 Matrix:Groundwater Date Collected:7/28/21 18:30 Project: 21-0304, Holcomb Creosote Station ID:MW-2 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 11(3-and/or 4-)Methylphenol ug/L EPA 8270D11U1319-77-3 8/03/2117:248/02/21 7:56 2.11,1-Biphenyl ug/L EPA 8270D11092-52-4 8/03/2117:248/02/21 7:56 2.11,4-Dioxane ug/L EPA 8270D2.1 U123-91-1 8/03/2117:248/02/21 7:56 421-Methylnaphthalene ug/L EPA 8270D42090-12-0 8/03/2120:058/02/21 7:56 112,3,4,6-Tetrachlorophenol ug/L EPA 8270D11U58-90-2 8/03/2117:248/02/21 7:56 112,4,5-Trichlorophenol ug/L EPA 8270D11U95-95-4 8/03/2117:248/02/21 7:56 112,4,6-Trichlorophenol ug/L EPA 8270D11U88-06-2 8/03/2117:248/02/21 7:56 112,4-Dichlorophenol ug/L EPA 8270D11U120-83-2 8/03/2117:248/02/21 7:56 112,4-Dimethylphenol ug/L EPA 8270D11U105-67-9 8/03/2117:248/02/21 7:56 212,4-Dinitrophenol ug/L EPA 8270D21U51-28-5 8/03/2117:248/02/21 7:56 112,4-Dinitrotoluene ug/L EPA 8270D11U121-14-2 8/03/2117:248/02/21 7:56 112,6-Dinitrotoluene ug/L EPA 8270D11U606-20-2 8/03/2117:248/02/21 7:56 112-Chloronaphthalene ug/L EPA 8270D11U91-58-7 8/03/2117:248/02/21 7:56 112-Chlorophenol ug/L EPA 8270D11U95-57-8 8/03/2117:248/02/21 7:56 112-Methyl-4,6-dinitrophenol ug/L EPA 8270D11U534-52-1 8/03/2117:248/02/21 7:56 422-Methylnaphthalene ug/L EPA 8270D81091-57-6 8/03/2120:058/02/21 7:56 112-Methylphenol ug/L EPA 8270D11U95-48-7 8/03/2117:248/02/21 7:56 112-Nitroaniline ug/L EPA 8270D11U88-74-4 8/03/2117:248/02/21 7:56 112-Nitrophenol ug/L EPA 8270D11U88-75-5 8/03/2117:248/02/21 7:56 113,3'-Dichlorobenzidine ug/L EPA 8270D11U91-94-1 8/03/2117:248/02/21 7:56 113-Nitroaniline ug/L EPA 8270D11U99-09-2 8/03/2117:248/02/21 7:56 114-Bromophenyl phenyl ether ug/L EPA 8270D11U101-55-3 8/03/2117:248/02/21 7:56 114-Chloro-3-methylphenol ug/L EPA 8270D11U59-50-7 8/03/2117:248/02/21 7:56 114-Chloroaniline ug/L EPA 8270D11U106-47-8 8/03/2117:248/02/21 7:56 114-Chlorophenyl phenyl ether ug/L EPA 8270D11U7005-72-3 8/03/2117:248/02/21 7:56 114-Nitroaniline ug/L EPA 8270D11U100-01-6 8/03/2117:248/02/21 7:56 114-Nitrophenol ug/L EPA 8270D11U100-02-7 8/03/2117:248/02/21 7:56 42Acenaphtheneug/L EPA 8270D47083-32-9 8/03/2120:058/02/21 7:56 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 5 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-2 E213107-01 Matrix:Groundwater Date Collected:7/28/21 18:30 Project: 21-0304, Holcomb Creosote Station ID:MW-2 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 2.1Acenaphthyleneug/L EPA 8270D2.1 U208-96-8 8/03/2117:248/02/21 7:56 11Acetophenoneug/L EPA 8270D11U98-86-2 8/03/2117:248/02/21 7:56 2.1Anthraceneug/L EPA 8270D3.7120-12-7 8/03/2117:248/02/21 7:56 11Atrazineug/L EPA 8270D11U1912-24-9 8/03/2117:248/02/21 7:56 11Benzaldehydeug/L EPA 8270D11U100-52-7 8/03/2117:248/02/21 7:56 2.1Benzo(a)anthracene ug/L EPA 8270D2.1 U56-55-3 8/03/2117:248/02/21 7:56 2.1Benzo(a)pyrene ug/L EPA 8270D2.1 U50-32-8 8/03/2117:248/02/21 7:56 2.1Benzo(b)fluoranthene ug/L EPA 8270D2.1 U205-99-2 8/03/2117:248/02/21 7:56 2.1Benzo(g,h,i)perylene ug/L EPA 8270D2.1 U191-24-2 8/03/2117:248/02/21 7:56 2.1Benzo(k)fluoranthene ug/L EPA 8270D2.1 U207-08-9 8/03/2117:248/02/21 7:56 11Benzyl alcohol ug/L EPA 8270D11U100-51-6 8/03/2117:248/02/21 7:56 11Benzyl butyl phthalate ug/L EPA 8270D11U, J, QL-385-68-7 8/03/2117:248/02/21 7:56 11Bis(2-chloro-1-methylethyl) ether ug/L EPA 8270D11U108-60-1 8/03/2117:248/02/21 7:56 11Bis(2-chloroethoxy)methane ug/L EPA 8270D11U111-91-1 8/03/2117:248/02/21 7:56 11bis(2-Chloroethyl) Ether ug/L EPA 8270D11U111-44-4 8/03/2117:248/02/21 7:56 11Bis(2-ethylhexyl) phthalate ug/L EPA 8270D11U117-81-7 8/03/2117:248/02/21 7:56 11Caprolactamug/L EPA 8270D11U105-60-2 8/03/2117:248/02/21 7:56 42Carbazoleug/L EPA 8270D14086-74-8 8/03/2120:058/02/21 7:56 2.1Chryseneug/L EPA 8270D2.1 U218-01-9 8/03/2117:248/02/21 7:56 2.1Dibenz(a,h)anthracene ug/L EPA 8270D2.1 U53-70-3 8/03/2117:248/02/21 7:56 42Dibenzofuranug/L EPA 8270D260132-64-9 8/03/2120:058/02/21 7:56 11Diethyl phthalate ug/L EPA 8270D11U84-66-2 8/03/2117:248/02/21 7:56 11Dimethyl phthalate ug/L EPA 8270D11U131-11-3 8/03/2117:248/02/21 7:56 11Di-n-butylphthalate ug/L EPA 8270D11U84-74-2 8/03/2117:248/02/21 7:56 11Di-n-octylphthalate ug/L EPA 8270D11U117-84-0 8/03/2117:248/02/21 7:56 2.1Fluorantheneug/L EPA 8270D10206-44-0 8/03/2117:248/02/21 7:56 42Fluoreneug/L EPA 8270D19086-73-7 8/03/2120:058/02/21 7:56 11Hexachlorobenzene (HCB)ug/L EPA 8270D11U, J, QL-3118-74-1 8/03/2117:248/02/21 7:56 11Hexachlorocyclopentadiene (HCCP)ug/L EPA 8270D11U77-47-4 8/03/2117:248/02/21 7:56 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 6 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-2 E213107-01 Matrix:Groundwater Date Collected:7/28/21 18:30 Project: 21-0304, Holcomb Creosote Station ID:MW-2 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 11Hexachloroethaneug/L EPA 8270D11U67-72-1 8/03/2117:248/02/21 7:56 2.1Indeno (1,2,3-cd) pyrene ug/L EPA 8270D2.1 U193-39-5 8/03/2117:248/02/21 7:56 11Isophoroneug/L EPA 8270D11U78-59-1 8/03/2117:248/02/21 7:56 210Naphthaleneug/L EPA 8270D510091-20-3 8/05/2116:238/02/21 7:56 11Nitrobenzeneug/L EPA 8270D11U98-95-3 8/03/2117:248/02/21 7:56 11n-Nitroso di-n-Propylamine ug/L EPA 8270D11U621-64-7 8/03/2117:248/02/21 7:56 11n-Nitrosodiphenylamine/Diphenylamine ug/L EPA 8270D11U122-39-4 8/03/2117:248/02/21 7:56 11Pentachlorophenolug/L EPA 8270D11U87-86-5 8/03/2117:248/02/21 7:56 42Phenanthreneug/L EPA 8270D21085-01-8 8/03/2120:058/02/21 7:56 11Phenolug/L EPA 8270D11U108-95-2 8/03/2117:248/02/21 7:56 2.1Pyreneug/L EPA 8270D5.6129-00-0 8/03/2117:248/02/21 7:56 Tentatively Identified Compounds: EPA 8270Dug/L10Biphenylcarboxaldehyde (TIC)NJR4-8001490 8/03/2117:248/02/21 7:56 EPA 8270Dug/L70Dimethylnaphthalene (TIC)NJR4-6507 8/03/2117:248/02/21 7:56 EPA 8270Dug/L10Phenanthridinone (TIC)NJR4-8000020 8/03/2117:248/02/21 7:56 EPA 8270Dug/L20Unidentified Compound(s)JR4-6501 8/03/2117:248/02/21 7:56 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 7 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-57 E213107-02 Matrix:Groundwater Date Collected:7/29/21 14:05 Project: 21-0304, Holcomb Creosote Station ID:MW-57 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 10(3-and/or 4-)Methylphenol ug/L EPA 8270D10U1319-77-3 8/03/2117:568/02/21 7:56 411,1-Biphenyl ug/L EPA 8270D14092-52-4 8/03/2120:378/02/21 7:56 2.01,4-Dioxane ug/L EPA 8270D2.0 U123-91-1 8/03/2117:568/02/21 7:56 411-Methylnaphthalene ug/L EPA 8270D43090-12-0 8/03/2120:378/02/21 7:56 102,3,4,6-Tetrachlorophenol ug/L EPA 8270D10U58-90-2 8/03/2117:568/02/21 7:56 102,4,5-Trichlorophenol ug/L EPA 8270D10U95-95-4 8/03/2117:568/02/21 7:56 102,4,6-Trichlorophenol ug/L EPA 8270D10U88-06-2 8/03/2117:568/02/21 7:56 102,4-Dichlorophenol ug/L EPA 8270D10U120-83-2 8/03/2117:568/02/21 7:56 102,4-Dimethylphenol ug/L EPA 8270D10U105-67-9 8/03/2117:568/02/21 7:56 202,4-Dinitrophenol ug/L EPA 8270D20U51-28-5 8/03/2117:568/02/21 7:56 102,4-Dinitrotoluene ug/L EPA 8270D10U121-14-2 8/03/2117:568/02/21 7:56 102,6-Dinitrotoluene ug/L EPA 8270D10U606-20-2 8/03/2117:568/02/21 7:56 102-Chloronaphthalene ug/L EPA 8270D10U91-58-7 8/03/2117:568/02/21 7:56 102-Chlorophenol ug/L EPA 8270D10U95-57-8 8/03/2117:568/02/21 7:56 102-Methyl-4,6-dinitrophenol ug/L EPA 8270D10U534-52-1 8/03/2117:568/02/21 7:56 412-Methylnaphthalene ug/L EPA 8270D98091-57-6 8/03/2120:378/02/21 7:56 102-Methylphenol ug/L EPA 8270D10U95-48-7 8/03/2117:568/02/21 7:56 102-Nitroaniline ug/L EPA 8270D10U88-74-4 8/03/2117:568/02/21 7:56 102-Nitrophenol ug/L EPA 8270D10U88-75-5 8/03/2117:568/02/21 7:56 103,3'-Dichlorobenzidine ug/L EPA 8270D10U91-94-1 8/03/2117:568/02/21 7:56 103-Nitroaniline ug/L EPA 8270D10U99-09-2 8/03/2117:568/02/21 7:56 104-Bromophenyl phenyl ether ug/L EPA 8270D10U101-55-3 8/03/2117:568/02/21 7:56 104-Chloro-3-methylphenol ug/L EPA 8270D10U59-50-7 8/03/2117:568/02/21 7:56 104-Chloroaniline ug/L EPA 8270D10U106-47-8 8/03/2117:568/02/21 7:56 104-Chlorophenyl phenyl ether ug/L EPA 8270D10U7005-72-3 8/03/2117:568/02/21 7:56 104-Nitroaniline ug/L EPA 8270D10U100-01-6 8/03/2117:568/02/21 7:56 104-Nitrophenol ug/L EPA 8270D10U100-02-7 8/03/2117:568/02/21 7:56 41Acenaphtheneug/L EPA 8270D69083-32-9 8/03/2120:378/02/21 7:56 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 8 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-57 E213107-02 Matrix:Groundwater Date Collected:7/29/21 14:05 Project: 21-0304, Holcomb Creosote Station ID:MW-57 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 2.0Acenaphthyleneug/L EPA 8270D4.2208-96-8 8/03/2117:568/02/21 7:56 10Acetophenoneug/L EPA 8270D10U98-86-2 8/03/2117:568/02/21 7:56 2.0Anthraceneug/L EPA 8270D1.0 J, Q-2120-12-7 8/03/2117:568/02/21 7:56 10Atrazineug/L EPA 8270D10U1912-24-9 8/03/2117:568/02/21 7:56 10Benzaldehydeug/L EPA 8270D10U100-52-7 8/03/2117:568/02/21 7:56 2.0Benzo(a)anthracene ug/L EPA 8270D2.0 U56-55-3 8/03/2117:568/02/21 7:56 2.0Benzo(a)pyrene ug/L EPA 8270D2.0 U50-32-8 8/03/2117:568/02/21 7:56 2.0Benzo(b)fluoranthene ug/L EPA 8270D2.0 U205-99-2 8/03/2117:568/02/21 7:56 2.0Benzo(g,h,i)perylene ug/L EPA 8270D2.0 U191-24-2 8/03/2117:568/02/21 7:56 2.0Benzo(k)fluoranthene ug/L EPA 8270D2.0 U207-08-9 8/03/2117:568/02/21 7:56 10Benzyl alcohol ug/L EPA 8270D10U100-51-6 8/03/2117:568/02/21 7:56 10Benzyl butyl phthalate ug/L EPA 8270D10U, J, QL-385-68-7 8/03/2117:568/02/21 7:56 10Bis(2-chloro-1-methylethyl) ether ug/L EPA 8270D10U108-60-1 8/03/2117:568/02/21 7:56 10Bis(2-chloroethoxy)methane ug/L EPA 8270D10U111-91-1 8/03/2117:568/02/21 7:56 10bis(2-Chloroethyl) Ether ug/L EPA 8270D10U111-44-4 8/03/2117:568/02/21 7:56 10Bis(2-ethylhexyl) phthalate ug/L EPA 8270D10U117-81-7 8/03/2117:568/02/21 7:56 10Caprolactamug/L EPA 8270D10U105-60-2 8/03/2117:568/02/21 7:56 41Carbazoleug/L EPA 8270D22086-74-8 8/03/2120:378/02/21 7:56 2.0Chryseneug/L EPA 8270D2.0 U218-01-9 8/03/2117:568/02/21 7:56 2.0Dibenz(a,h)anthracene ug/L EPA 8270D2.0 U53-70-3 8/03/2117:568/02/21 7:56 41Dibenzofuranug/L EPA 8270D360132-64-9 8/03/2120:378/02/21 7:56 10Diethyl phthalate ug/L EPA 8270D10U84-66-2 8/03/2117:568/02/21 7:56 10Dimethyl phthalate ug/L EPA 8270D10U131-11-3 8/03/2117:568/02/21 7:56 10Di-n-butylphthalate ug/L EPA 8270D10U84-74-2 8/03/2117:568/02/21 7:56 10Di-n-octylphthalate ug/L EPA 8270D10U117-84-0 8/03/2117:568/02/21 7:56 2.0Fluorantheneug/L EPA 8270D2.7206-44-0 8/03/2117:568/02/21 7:56 41Fluoreneug/L EPA 8270D15086-73-7 8/03/2120:378/02/21 7:56 10Hexachlorobenzene (HCB)ug/L EPA 8270D10U, J, QL-3118-74-1 8/03/2117:568/02/21 7:56 10Hexachlorocyclopentadiene (HCCP)ug/L EPA 8270D10U77-47-4 8/03/2117:568/02/21 7:56 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 9 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-57 E213107-02 Matrix:Groundwater Date Collected:7/29/21 14:05 Project: 21-0304, Holcomb Creosote Station ID:MW-57 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 10Hexachloroethaneug/L EPA 8270D10U67-72-1 8/03/2117:568/02/21 7:56 2.0Indeno (1,2,3-cd) pyrene ug/L EPA 8270D2.0 U193-39-5 8/03/2117:568/02/21 7:56 10Isophoroneug/L EPA 8270D10U78-59-1 8/03/2117:568/02/21 7:56 200Naphthaleneug/L EPA 8270D1100091-20-3 8/05/2116:558/02/21 7:56 10Nitrobenzeneug/L EPA 8270D10U98-95-3 8/03/2117:568/02/21 7:56 10n-Nitroso di-n-Propylamine ug/L EPA 8270D10U621-64-7 8/03/2117:568/02/21 7:56 10n-Nitrosodiphenylamine/Diphenylamine ug/L EPA 8270D10U122-39-4 8/03/2117:568/02/21 7:56 10Pentachlorophenolug/L EPA 8270D10U87-86-5 8/03/2117:568/02/21 7:56 41Phenanthreneug/L EPA 8270D12085-01-8 8/03/2120:378/02/21 7:56 10Phenolug/L EPA 8270D10U108-95-2 8/03/2117:568/02/21 7:56 2.0Pyreneug/L EPA 8270D1.2 J, Q-2129-00-0 8/03/2117:568/02/21 7:56 Tentatively Identified Compounds: EPA 8270Dug/L80Dimethylnaphthalene (TIC)NJR4-6507 8/03/2117:568/02/21 7:56 EPA 8270Dug/L20Thebenidinone (TIC)NJR4-8001489 8/03/2117:568/02/21 7:56 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 10 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-58 E213107-03 Matrix:Groundwater Date Collected:7/29/21 16:35 Project: 21-0304, Holcomb Creosote Station ID:MW-58 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 10(3-and/or 4-)Methylphenol ug/L EPA 8270D10U1319-77-3 8/03/2118:288/02/21 7:56 401,1-Biphenyl ug/L EPA 8270D10092-52-4 8/03/2121:098/02/21 7:56 2.01,4-Dioxane ug/L EPA 8270D2.0 U123-91-1 8/03/2118:288/02/21 7:56 401-Methylnaphthalene ug/L EPA 8270D31090-12-0 8/03/2121:098/02/21 7:56 102,3,4,6-Tetrachlorophenol ug/L EPA 8270D10U58-90-2 8/03/2118:288/02/21 7:56 102,4,5-Trichlorophenol ug/L EPA 8270D10U95-95-4 8/03/2118:288/02/21 7:56 102,4,6-Trichlorophenol ug/L EPA 8270D10U88-06-2 8/03/2118:288/02/21 7:56 102,4-Dichlorophenol ug/L EPA 8270D10U120-83-2 8/03/2118:288/02/21 7:56 102,4-Dimethylphenol ug/L EPA 8270D10U105-67-9 8/03/2118:288/02/21 7:56 202,4-Dinitrophenol ug/L EPA 8270D20U51-28-5 8/03/2118:288/02/21 7:56 102,4-Dinitrotoluene ug/L EPA 8270D10U121-14-2 8/03/2118:288/02/21 7:56 102,6-Dinitrotoluene ug/L EPA 8270D10U606-20-2 8/03/2118:288/02/21 7:56 102-Chloronaphthalene ug/L EPA 8270D10U91-58-7 8/03/2118:288/02/21 7:56 102-Chlorophenol ug/L EPA 8270D10U95-57-8 8/03/2118:288/02/21 7:56 102-Methyl-4,6-dinitrophenol ug/L EPA 8270D10U534-52-1 8/03/2118:288/02/21 7:56 402-Methylnaphthalene ug/L EPA 8270D73091-57-6 8/03/2121:098/02/21 7:56 102-Methylphenol ug/L EPA 8270D10U95-48-7 8/03/2118:288/02/21 7:56 102-Nitroaniline ug/L EPA 8270D10U88-74-4 8/03/2118:288/02/21 7:56 102-Nitrophenol ug/L EPA 8270D10U88-75-5 8/03/2118:288/02/21 7:56 103,3'-Dichlorobenzidine ug/L EPA 8270D10U91-94-1 8/03/2118:288/02/21 7:56 103-Nitroaniline ug/L EPA 8270D10U99-09-2 8/03/2118:288/02/21 7:56 104-Bromophenyl phenyl ether ug/L EPA 8270D10U101-55-3 8/03/2118:288/02/21 7:56 104-Chloro-3-methylphenol ug/L EPA 8270D10U59-50-7 8/03/2118:288/02/21 7:56 104-Chloroaniline ug/L EPA 8270D10U106-47-8 8/03/2118:288/02/21 7:56 104-Chlorophenyl phenyl ether ug/L EPA 8270D10U7005-72-3 8/03/2118:288/02/21 7:56 104-Nitroaniline ug/L EPA 8270D10U100-01-6 8/03/2118:288/02/21 7:56 104-Nitrophenol ug/L EPA 8270D10U100-02-7 8/03/2118:288/02/21 7:56 40Acenaphtheneug/L EPA 8270D45083-32-9 8/03/2121:098/02/21 7:56 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 11 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-58 E213107-03 Matrix:Groundwater Date Collected:7/29/21 16:35 Project: 21-0304, Holcomb Creosote Station ID:MW-58 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 2.0Acenaphthyleneug/L EPA 8270D5.9208-96-8 8/03/2118:288/02/21 7:56 10Acetophenoneug/L EPA 8270D10U98-86-2 8/03/2118:288/02/21 7:56 2.0Anthraceneug/L EPA 8270D5.3120-12-7 8/03/2118:288/02/21 7:56 10Atrazineug/L EPA 8270D10U1912-24-9 8/03/2118:288/02/21 7:56 10Benzaldehydeug/L EPA 8270D10U100-52-7 8/03/2118:288/02/21 7:56 2.0Benzo(a)anthracene ug/L EPA 8270D2.0 U56-55-3 8/03/2118:288/02/21 7:56 2.0Benzo(a)pyrene ug/L EPA 8270D2.0 U50-32-8 8/03/2118:288/02/21 7:56 2.0Benzo(b)fluoranthene ug/L EPA 8270D2.0 U205-99-2 8/03/2118:288/02/21 7:56 2.0Benzo(g,h,i)perylene ug/L EPA 8270D2.0 U191-24-2 8/03/2118:288/02/21 7:56 2.0Benzo(k)fluoranthene ug/L EPA 8270D2.0 U207-08-9 8/03/2118:288/02/21 7:56 10Benzyl alcohol ug/L EPA 8270D10U100-51-6 8/03/2118:288/02/21 7:56 10Benzyl butyl phthalate ug/L EPA 8270D10U, J, QL-385-68-7 8/03/2118:288/02/21 7:56 10Bis(2-chloro-1-methylethyl) ether ug/L EPA 8270D10U108-60-1 8/03/2118:288/02/21 7:56 10Bis(2-chloroethoxy)methane ug/L EPA 8270D10U111-91-1 8/03/2118:288/02/21 7:56 10bis(2-Chloroethyl) Ether ug/L EPA 8270D10U111-44-4 8/03/2118:288/02/21 7:56 10Bis(2-ethylhexyl) phthalate ug/L EPA 8270D10U117-81-7 8/03/2118:288/02/21 7:56 10Caprolactamug/L EPA 8270D10U105-60-2 8/03/2118:288/02/21 7:56 40Carbazoleug/L EPA 8270D13086-74-8 8/03/2121:098/02/21 7:56 2.0Chryseneug/L EPA 8270D2.0 U218-01-9 8/03/2118:288/02/21 7:56 2.0Dibenz(a,h)anthracene ug/L EPA 8270D2.0 U53-70-3 8/03/2118:288/02/21 7:56 40Dibenzofuranug/L EPA 8270D250132-64-9 8/03/2121:098/02/21 7:56 10Diethyl phthalate ug/L EPA 8270D10U84-66-2 8/03/2118:288/02/21 7:56 10Dimethyl phthalate ug/L EPA 8270D10U131-11-3 8/03/2118:288/02/21 7:56 10Di-n-butylphthalate ug/L EPA 8270D10U84-74-2 8/03/2118:288/02/21 7:56 10Di-n-octylphthalate ug/L EPA 8270D10U117-84-0 8/03/2118:288/02/21 7:56 2.0Fluorantheneug/L EPA 8270D7.6206-44-0 8/03/2118:288/02/21 7:56 40Fluoreneug/L EPA 8270D13086-73-7 8/03/2121:098/02/21 7:56 10Hexachlorobenzene (HCB)ug/L EPA 8270D10U, J, QL-3118-74-1 8/03/2118:288/02/21 7:56 10Hexachlorocyclopentadiene (HCCP)ug/L EPA 8270D10U77-47-4 8/03/2118:288/02/21 7:56 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 12 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-58 E213107-03 Matrix:Groundwater Date Collected:7/29/21 16:35 Project: 21-0304, Holcomb Creosote Station ID:MW-58 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 10Hexachloroethaneug/L EPA 8270D10U67-72-1 8/03/2118:288/02/21 7:56 2.0Indeno (1,2,3-cd) pyrene ug/L EPA 8270D2.0 U193-39-5 8/03/2118:288/02/21 7:56 10Isophoroneug/L EPA 8270D10U78-59-1 8/03/2118:288/02/21 7:56 200Naphthaleneug/L EPA 8270D660091-20-3 8/05/2117:278/02/21 7:56 10Nitrobenzeneug/L EPA 8270D10U98-95-3 8/03/2118:288/02/21 7:56 10n-Nitroso di-n-Propylamine ug/L EPA 8270D10U621-64-7 8/03/2118:288/02/21 7:56 10n-Nitrosodiphenylamine/Diphenylamine ug/L EPA 8270D10U122-39-4 8/03/2118:288/02/21 7:56 10Pentachlorophenolug/L EPA 8270D10U87-86-5 8/03/2118:288/02/21 7:56 40Phenanthreneug/L EPA 8270D11085-01-8 8/03/2121:098/02/21 7:56 10Phenolug/L EPA 8270D10U108-95-2 8/03/2118:288/02/21 7:56 2.0Pyreneug/L EPA 8270D4.2129-00-0 8/03/2118:288/02/21 7:56 Tentatively Identified Compounds: EPA 8270Dug/L70Dimethylnaphthalene (TIC)NJR4-6507 8/03/2118:288/02/21 7:56 EPA 8270Dug/L20Unidentified Compound(s)JR4-6501 8/03/2118:288/02/21 7:56 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 13 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-6 E213107-04 Matrix:Groundwater Date Collected:7/28/21 12:40 Project: 21-0304, Holcomb Creosote Station ID:MW-6 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 9.9(3-and/or 4-)Methylphenol ug/L EPA 8270D9.9 U1319-77-3 8/03/2119:018/02/21 7:56 401,1-Biphenyl ug/L EPA 8270D14092-52-4 8/03/2121:418/02/21 7:56 2.01,4-Dioxane ug/L EPA 8270D2.0 U123-91-1 8/03/2119:018/02/21 7:56 401-Methylnaphthalene ug/L EPA 8270D45090-12-0 8/03/2121:418/02/21 7:56 9.92,3,4,6-Tetrachlorophenol ug/L EPA 8270D9.9 U58-90-2 8/03/2119:018/02/21 7:56 9.92,4,5-Trichlorophenol ug/L EPA 8270D9.9 U95-95-4 8/03/2119:018/02/21 7:56 9.92,4,6-Trichlorophenol ug/L EPA 8270D9.9 U88-06-2 8/03/2119:018/02/21 7:56 9.92,4-Dichlorophenol ug/L EPA 8270D9.9 U120-83-2 8/03/2119:018/02/21 7:56 9.92,4-Dimethylphenol ug/L EPA 8270D9.9 U105-67-9 8/03/2119:018/02/21 7:56 202,4-Dinitrophenol ug/L EPA 8270D20U51-28-5 8/03/2119:018/02/21 7:56 9.92,4-Dinitrotoluene ug/L EPA 8270D9.9 U121-14-2 8/03/2119:018/02/21 7:56 9.92,6-Dinitrotoluene ug/L EPA 8270D9.9 U606-20-2 8/03/2119:018/02/21 7:56 9.92-Chloronaphthalene ug/L EPA 8270D9.9 U91-58-7 8/03/2119:018/02/21 7:56 9.92-Chlorophenol ug/L EPA 8270D9.9 U95-57-8 8/03/2119:018/02/21 7:56 9.92-Methyl-4,6-dinitrophenol ug/L EPA 8270D9.9 U534-52-1 8/03/2119:018/02/21 7:56 402-Methylnaphthalene ug/L EPA 8270D100091-57-6 8/03/2121:418/02/21 7:56 9.92-Methylphenol ug/L EPA 8270D9.9 U95-48-7 8/03/2119:018/02/21 7:56 9.92-Nitroaniline ug/L EPA 8270D9.9 U88-74-4 8/03/2119:018/02/21 7:56 9.92-Nitrophenol ug/L EPA 8270D9.9 U88-75-5 8/03/2119:018/02/21 7:56 9.93,3'-Dichlorobenzidine ug/L EPA 8270D9.9 U91-94-1 8/03/2119:018/02/21 7:56 9.93-Nitroaniline ug/L EPA 8270D9.9 U99-09-2 8/03/2119:018/02/21 7:56 9.94-Bromophenyl phenyl ether ug/L EPA 8270D9.9 U101-55-3 8/03/2119:018/02/21 7:56 9.94-Chloro-3-methylphenol ug/L EPA 8270D9.9 U59-50-7 8/03/2119:018/02/21 7:56 9.94-Chloroaniline ug/L EPA 8270D9.9 U106-47-8 8/03/2119:018/02/21 7:56 9.94-Chlorophenyl phenyl ether ug/L EPA 8270D9.9 U7005-72-3 8/03/2119:018/02/21 7:56 9.94-Nitroaniline ug/L EPA 8270D9.9 U100-01-6 8/03/2119:018/02/21 7:56 9.94-Nitrophenol ug/L EPA 8270D9.9 U100-02-7 8/03/2119:018/02/21 7:56 40Acenaphtheneug/L EPA 8270D67083-32-9 8/03/2121:418/02/21 7:56 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 14 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-6 E213107-04 Matrix:Groundwater Date Collected:7/28/21 12:40 Project: 21-0304, Holcomb Creosote Station ID:MW-6 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 2.0Acenaphthyleneug/L EPA 8270D5.4208-96-8 8/03/2119:018/02/21 7:56 9.9Acetophenoneug/L EPA 8270D9.9 U98-86-2 8/03/2119:018/02/21 7:56 2.0Anthraceneug/L EPA 8270D7.4120-12-7 8/03/2119:018/02/21 7:56 9.9Atrazineug/L EPA 8270D9.9 U1912-24-9 8/03/2119:018/02/21 7:56 9.9Benzaldehydeug/L EPA 8270D9.9 U100-52-7 8/03/2119:018/02/21 7:56 2.0Benzo(a)anthracene ug/L EPA 8270D2.0 U56-55-3 8/03/2119:018/02/21 7:56 2.0Benzo(a)pyrene ug/L EPA 8270D2.0 U50-32-8 8/03/2119:018/02/21 7:56 2.0Benzo(b)fluoranthene ug/L EPA 8270D2.0 U205-99-2 8/03/2119:018/02/21 7:56 2.0Benzo(g,h,i)perylene ug/L EPA 8270D2.0 U191-24-2 8/03/2119:018/02/21 7:56 2.0Benzo(k)fluoranthene ug/L EPA 8270D2.0 U207-08-9 8/03/2119:018/02/21 7:56 9.9Benzyl alcohol ug/L EPA 8270D9.9 U100-51-6 8/03/2119:018/02/21 7:56 9.9Benzyl butyl phthalate ug/L EPA 8270D9.9 U, J, QL-385-68-7 8/03/2119:018/02/21 7:56 9.9Bis(2-chloro-1-methylethyl) ether ug/L EPA 8270D9.9 U108-60-1 8/03/2119:018/02/21 7:56 9.9Bis(2-chloroethoxy)methane ug/L EPA 8270D9.9 U111-91-1 8/03/2119:018/02/21 7:56 9.9bis(2-Chloroethyl) Ether ug/L EPA 8270D9.9 U111-44-4 8/03/2119:018/02/21 7:56 9.9Bis(2-ethylhexyl) phthalate ug/L EPA 8270D9.9 U117-81-7 8/03/2119:018/02/21 7:56 9.9Caprolactamug/L EPA 8270D9.9 U105-60-2 8/03/2119:018/02/21 7:56 40Carbazoleug/L EPA 8270D42086-74-8 8/03/2121:418/02/21 7:56 2.0Chryseneug/L EPA 8270D2.0 U218-01-9 8/03/2119:018/02/21 7:56 2.0Dibenz(a,h)anthracene ug/L EPA 8270D2.0 U53-70-3 8/03/2119:018/02/21 7:56 40Dibenzofuranug/L EPA 8270D350132-64-9 8/03/2121:418/02/21 7:56 9.9Diethyl phthalate ug/L EPA 8270D9.9 U84-66-2 8/03/2119:018/02/21 7:56 9.9Dimethyl phthalate ug/L EPA 8270D9.9 U131-11-3 8/03/2119:018/02/21 7:56 9.9Di-n-butylphthalate ug/L EPA 8270D9.9 U84-74-2 8/03/2119:018/02/21 7:56 9.9Di-n-octylphthalate ug/L EPA 8270D9.9 U117-84-0 8/03/2119:018/02/21 7:56 2.0Fluorantheneug/L EPA 8270D11206-44-0 8/03/2119:018/02/21 7:56 40Fluoreneug/L EPA 8270D23086-73-7 8/03/2121:418/02/21 7:56 9.9Hexachlorobenzene (HCB)ug/L EPA 8270D9.9 U, J, QL-3118-74-1 8/03/2119:018/02/21 7:56 9.9Hexachlorocyclopentadiene (HCCP)ug/L EPA 8270D9.9 U77-47-4 8/03/2119:018/02/21 7:56 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 15 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-6 E213107-04 Matrix:Groundwater Date Collected:7/28/21 12:40 Project: 21-0304, Holcomb Creosote Station ID:MW-6 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 9.9Hexachloroethaneug/L EPA 8270D9.9 U67-72-1 8/03/2119:018/02/21 7:56 2.0Indeno (1,2,3-cd) pyrene ug/L EPA 8270D2.0 U193-39-5 8/03/2119:018/02/21 7:56 9.9Isophoroneug/L EPA 8270D9.9 U78-59-1 8/03/2119:018/02/21 7:56 2000Naphthaleneug/L EPA 8270D1400091-20-3 8/05/2118:318/02/21 7:56 9.9Nitrobenzeneug/L EPA 8270D9.9 U98-95-3 8/03/2119:018/02/21 7:56 9.9n-Nitroso di-n-Propylamine ug/L EPA 8270D9.9 U621-64-7 8/03/2119:018/02/21 7:56 9.9n-Nitrosodiphenylamine/Diphenylamine ug/L EPA 8270D9.9 U122-39-4 8/03/2119:018/02/21 7:56 9.9Pentachlorophenolug/L EPA 8270D9.9 U87-86-5 8/03/2119:018/02/21 7:56 40Phenanthreneug/L EPA 8270D17085-01-8 8/03/2121:418/02/21 7:56 9.9Phenolug/L EPA 8270D9.9 U108-95-2 8/03/2119:018/02/21 7:56 2.0Pyreneug/L EPA 8270D6.7129-00-0 8/03/2119:018/02/21 7:56 Tentatively Identified Compounds: EPA 8270Dug/L20Cyclopentaphenanthrenone (TIC)NJR4-8000614 8/03/2119:018/02/21 7:56 EPA 8270Dug/L90Dimethylnaphthalene (TIC)NJR4-6507 8/03/2119:018/02/21 7:56 EPA 8270Dug/L10Methyldibenzofuran (TIC)NJR4-8000026 8/03/2119:018/02/21 7:56 EPA 8270Dug/L30Phenanthridinone (TIC)NJR4-8000020 8/03/2119:018/02/21 7:56 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 16 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2108002 - E 3520 LLE Blank (2108002-BLK1)Prepared: 08/02/21 Analyzed: 08/03/21 EPA 8270D (3-and/or 4-)Methylphenol ug/LU10 U 1,1-Biphenyl "U 2.0 U 1,4-Dioxane "U 2.0 U 1-Methylnaphthalene "U 2.0 U 2,3,4,6-Tetrachlorophenol "U 10 U 2,4,5-Trichlorophenol "U 10 U 2,4,6-Trichlorophenol "U 10 U 2,4-Dichlorophenol "U 10 U 2,4-Dimethylphenol "U 10 U 2,4-Dinitrophenol "U 20 U 2,4-Dinitrotoluene "U 10 U 2,6-Dinitrotoluene "U 10 U 2-Chloronaphthalene "U 10 U 2-Chlorophenol "U 10 U 2-Methyl-4,6-dinitrophenol "U 10 U 2-Methylnaphthalene "U 2.0 U 2-Methylphenol "U 10 U 2-Nitroaniline "U 10 U 2-Nitrophenol "U 10 U 3,3'-Dichlorobenzidine "U 10 U 3-Nitroaniline "U 10 U 4-Bromophenyl phenyl ether "U 10 U 4-Chloro-3-methylphenol "U 10 U 4-Chloroaniline "U 10 U 4-Chlorophenyl phenyl ether "U 10 U 4-Nitroaniline "U 10 U 4-Nitrophenol "U 10 U Acenaphthene "U 2.0 U Acenaphthylene "U 2.0 U Acetophenone "U 10 U Anthracene "U 2.0 U Atrazine "U 10 U Benzaldehyde "U 10 U Benzo(a)anthracene "U 2.0 U Benzo(a)pyrene "U 2.0 U Benzo(b)fluoranthene "U 2.0 U Benzo(g,h,i)perylene "U 2.0 U Benzo(k)fluoranthene "U 2.0 U Benzyl alcohol "U 10 U 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 17 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2108002 - E 3520 LLE Blank (2108002-BLK1)Prepared: 08/02/21 Analyzed: 08/03/21 Benzyl butyl phthalate ug/LU10 U Bis(2-chloro-1-methylethyl) ether "U 10 U Bis(2-chloroethoxy)methane "U 10 U bis(2-Chloroethyl) Ether "U 10 U Bis(2-ethylhexyl) phthalate "U 10 U Caprolactam "U 10 U Carbazole "U 2.0 U Chrysene "U 2.0 U Dibenz(a,h)anthracene "U 2.0 U Dibenzofuran "U 2.0 U Diethyl phthalate "U 10 U Dimethyl phthalate "U 10 U Di-n-butylphthalate "U 10 U Di-n-octylphthalate "U 10 U Fluoranthene "U 2.0 U Fluorene "U 2.0 U Hexachlorobenzene (HCB)"U 10 U Hexachlorocyclopentadiene (HCCP)"U 10 U Hexachloroethane "U 10 U Indeno (1,2,3-cd) pyrene "U 2.0 U Isophorone "U 10 U Naphthalene "U 2.0 U Nitrobenzene "U 10 U n-Nitroso di-n-Propylamine "U 10 U n-Nitrosodiphenylamine/Diphenylamine "U 10 U Pentachlorophenol "U 10 U Phenanthrene "U 2.0 U Phenol "U 10 U Pyrene "U 2.0 U Tentatively Identified Compounds "U 10 U 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 18 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2108002 - E 3520 LLE LCS (2108002-BS1)Prepared: 08/02/21 Analyzed: 08/03/21 EPA 8270D (3-and/or 4-)Methylphenol ug/L57.960 10 60.000 55-11196.6 1,1-Biphenyl "59.170 2.0 60.000 51-11898.6 1,4-Dioxane "40.820 2.0 60.000 41-8968.0 1-Methylnaphthalene "58.250 2.0 60.000 61-12797.1 2,3,4,6-Tetrachlorophenol "55.190 10 60.000 45-13492.0 2,4,5-Trichlorophenol "58.800 10 60.000 56-13198.0 2,4,6-Trichlorophenol "57.280 10 60.000 56-12895.5 2,4-Dichlorophenol "58.190 10 60.000 63-12397.0 2,4-Dimethylphenol "49.930 10 60.000 44-10683.2 2,4-Dinitrophenol "116.30 20 120.00 49-12896.9 2,4-Dinitrotoluene "61.570 10 60.000 58-125103 2,6-Dinitrotoluene "60.910 10 60.000 60-122102 2-Chloronaphthalene "56.940 10 60.000 53-11594.9 2-Chlorophenol "48.280 10 60.000 55-11780.5 2-Methyl-4,6-dinitrophenol "52.720 10 60.000 62-12587.9 2-Methylnaphthalene "57.580 2.0 60.000 56-11596.0 2-Methylphenol "52.200 10 60.000 52-11187.0 2-Nitroaniline "69.800 10 60.000 58-121116 2-Nitrophenol "53.790 10 60.000 58-12689.6 3,3'-Dichlorobenzidine "44.800 10 60.000 10-14474.7 3-Nitroaniline "69.130 10 60.000 38-141115 4-Bromophenyl phenyl ether "67.670 10 60.000 61-117113 4-Chloro-3-methylphenol "59.070 10 60.000 64-12298.4 4-Chloroaniline "37.010 10 60.000 18-10261.7 4-Chlorophenyl phenyl ether "70.040 10 60.000 55-117117 4-Nitroaniline "75.490 10 60.000 15-185126 4-Nitrophenol "51.980 10 60.000 38-13086.6 Acenaphthene "59.040 2.0 60.000 53-11598.4 Acenaphthylene "58.500 2.0 60.000 53-11897.5 Acetophenone "59.920 10 60.000 60-11299.9 Anthracene "59.590 2.0 60.000 65-11099.3 Atrazine "38.760 10 60.000 53-12864.6 Benzaldehyde "77.260 10 60.000 QC-255-152129 Benzo(a)anthracene "53.080 2.0 60.000 52-12188.5 Benzo(a)pyrene "56.390 2.0 60.000 60-11594.0 Benzo(b)fluoranthene "55.070 2.0 60.000 58-11791.8 Benzo(g,h,i)perylene "53.810 2.0 60.000 45-10189.7 Benzo(k)fluoranthene "57.600 2.0 60.000 64-12496.0 Benzyl alcohol "55.190 10 60.000 49-11492.0 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 19 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2108002 - E 3520 LLE LCS (2108002-BS1)Prepared: 08/02/21 Analyzed: 08/03/21 Benzyl butyl phthalate ug/L60.980 10 60.000 58-129102 Bis(2-chloro-1-methylethyl) ether "64.360 10 60.000 55-113107 Bis(2-chloroethoxy)methane "59.690 10 60.000 59-11599.5 bis(2-Chloroethyl) Ether "59.810 10 60.000 53-11799.7 Bis(2-ethylhexyl) phthalate "61.860 10 60.000 56-130103 Caprolactam "46.950 10 60.000 33-9478.2 Carbazole "52.170 2.0 60.000 68-11487.0 Chrysene "54.340 2.0 60.000 58-12290.6 Dibenz(a,h)anthracene "45.740 2.0 60.000 46-11376.2 Dibenzofuran "60.050 2.0 60.000 50-133100 Diethyl phthalate "63.850 10 60.000 61-118106 Dimethyl phthalate "61.430 10 60.000 58-120102 Di-n-butylphthalate "65.900 10 60.000 63-117110 Di-n-octylphthalate "62.770 10 60.000 60-125105 Fluoranthene "60.700 2.0 60.000 68-113101 Fluorene "63.210 2.0 60.000 60-117105 Hexachlorobenzene (HCB)"63.510 10 60.000 56-120106 Hexachlorocyclopentadiene (HCCP)"50.810 10 60.000 18-10384.7 Hexachloroethane "40.280 10 60.000 35-10567.1 Indeno (1,2,3-cd) pyrene "54.680 2.0 60.000 47-11091.1 Isophorone "61.270 10 60.000 60-114102 Naphthalene "57.300 2.0 60.000 55-11395.5 Nitrobenzene "57.700 10 60.000 59-11496.2 n-Nitroso di-n-Propylamine "58.510 10 60.000 58-11397.5 n-Nitrosodiphenylamine/Diphenylamine "57.090 10 60.000 65-11595.2 Pentachlorophenol "55.800 10 60.000 47-12293.0 Phenanthrene "59.300 2.0 60.000 63-11198.8 Phenol "55.280 10 60.000 47-10492.1 Pyrene "53.380 2.0 60.000 48-12989.0 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 20 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2108002 - E 3520 LLE LCS Dup (2108002-BSD1)Prepared: 08/02/21 Analyzed: 08/03/21 EPA 8270D (3-and/or 4-)Methylphenol ug/L57.950 10 60.000 3055-11196.6 0.0173 1,1-Biphenyl "57.370 2.0 60.000 1851-11895.6 3.09 1,4-Dioxane "43.740 2.0 60.000 5041-8972.9 6.91 1-Methylnaphthalene "56.340 2.0 60.000 2161-12793.9 3.33 2,3,4,6-Tetrachlorophenol "54.440 10 60.000 1245-13490.7 1.37 2,4,5-Trichlorophenol "59.850 10 60.000 1456-13199.8 1.77 2,4,6-Trichlorophenol "57.380 10 60.000 1656-12895.6 0.174 2,4-Dichlorophenol "58.840 10 60.000 2563-12398.1 1.11 2,4-Dimethylphenol "49.770 10 60.000 2744-10683.0 0.321 2,4-Dinitrophenol "117.28 20 120.00 1749-12897.7 0.839 2,4-Dinitrotoluene "61.880 10 60.000 1058-125103 0.502 2,6-Dinitrotoluene "61.350 10 60.000 1260-122102 0.720 2-Chloronaphthalene "53.850 10 60.000 1953-11589.8 5.58 2-Chlorophenol "50.420 10 60.000 3555-11784.0 4.34 2-Methyl-4,6-dinitrophenol "53.900 10 60.000 1262-12589.8 2.21 2-Methylnaphthalene "56.220 2.0 60.000 2256-11593.7 2.39 2-Methylphenol "53.180 10 60.000 3352-11188.6 1.86 2-Nitroaniline "69.510 10 60.000 1358-121116 0.416 2-Nitrophenol "54.680 10 60.000 2858-12691.1 1.64 3,3'-Dichlorobenzidine "39.720 10 60.000 5310-14466.2 12.0 3-Nitroaniline "68.410 10 60.000 1938-141114 1.05 4-Bromophenyl phenyl ether "61.130 10 60.000 1261-117102 10.2 4-Chloro-3-methylphenol "59.850 10 60.000 1764-12299.8 1.31 4-Chloroaniline "35.300 10 60.000 4918-10258.8 4.73 4-Chlorophenyl phenyl ether "61.750 10 60.000 1755-117103 12.6 4-Nitroaniline "71.800 10 60.000 1915-185120 5.01 4-Nitrophenol "50.860 10 60.000 2338-13084.8 2.18 Acenaphthene "57.220 2.0 60.000 1453-11595.4 3.13 Acenaphthylene "56.430 2.0 60.000 1453-11894.0 3.60 Acetophenone "60.760 10 60.000 2760-112101 1.39 Anthracene "56.890 2.0 60.000 1065-11094.8 4.64 Atrazine "39.330 10 60.000 2253-12865.6 1.46 Benzaldehyde "77.420 10 60.000 28 QC-255-152129 0.207 Benzo(a)anthracene "51.020 2.0 60.000 1052-12185.0 3.96 Benzo(a)pyrene "54.570 2.0 60.000 1060-11591.0 3.28 Benzo(b)fluoranthene "53.230 2.0 60.000 2258-11788.7 3.40 Benzo(g,h,i)perylene "51.010 2.0 60.000 2045-10185.0 5.34 Benzo(k)fluoranthene "56.220 2.0 60.000 1964-12493.7 2.42 Benzyl alcohol "56.240 10 60.000 3449-11493.7 1.88 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 21 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2108002 - E 3520 LLE LCS Dup (2108002-BSD1)Prepared: 08/02/21 Analyzed: 08/03/21 Benzyl butyl phthalate ug/L54.990 10 60.000 10 QL-358-12991.6 10.3 Bis(2-chloro-1-methylethyl) ether "67.390 10 60.000 2055-113112 4.60 Bis(2-chloroethoxy)methane "61.060 10 60.000 2559-115102 2.27 bis(2-Chloroethyl) Ether "62.620 10 60.000 2453-117104 4.59 Bis(2-ethylhexyl) phthalate "55.640 10 60.000 3956-13092.7 10.6 Caprolactam "45.680 10 60.000 3633-9476.1 2.74 Carbazole "51.690 2.0 60.000 1468-11486.2 0.924 Chrysene "52.090 2.0 60.000 1058-12286.8 4.23 Dibenz(a,h)anthracene "43.430 2.0 60.000 2046-11372.4 5.18 Dibenzofuran "57.580 2.0 60.000 1350-13396.0 4.20 Diethyl phthalate "64.480 10 60.000 1061-118107 0.982 Dimethyl phthalate "61.610 10 60.000 1158-120103 0.293 Di-n-butylphthalate "59.950 10 60.000 1163-11799.9 9.46 Di-n-octylphthalate "56.190 10 60.000 1260-12593.6 11.1 Fluoranthene "58.930 2.0 60.000 1068-11398.2 2.96 Fluorene "60.020 2.0 60.000 1260-117100 5.18 Hexachlorobenzene (HCB)"55.050 10 60.000 12 QL-356-12091.8 14.3 Hexachlorocyclopentadiene (HCCP)"45.580 10 60.000 3218-10376.0 10.9 Hexachloroethane "44.230 10 60.000 4535-10573.7 9.35 Indeno (1,2,3-cd) pyrene "53.070 2.0 60.000 2047-11088.4 2.99 Isophorone "61.970 10 60.000 2060-114103 1.14 Naphthalene "56.950 2.0 60.000 2755-11394.9 0.613 Nitrobenzene "58.950 10 60.000 2959-11498.2 2.14 n-Nitroso di-n-Propylamine "59.370 10 60.000 2458-11399.0 1.46 n-Nitrosodiphenylamine/Diphenylamine "55.000 10 60.000 1065-11591.7 3.73 Pentachlorophenol "54.170 10 60.000 1147-12290.3 2.96 Phenanthrene "56.920 2.0 60.000 1063-11194.9 4.10 Phenol "55.230 10 60.000 3847-10492.0 0.0905 Pyrene "51.600 2.0 60.000 1048-12986.0 3.39 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 22 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2108002 - E 3520 LLE Duplicate (2108002-DUP1)Prepared: 08/02/21 Analyzed: 08/03/21 Source: E213107-01 EPA 8270D (3-and/or 4-)Methylphenol ug/LU10 U 200 U 1,1-Biphenyl "97.602 2.0 108.23 20010.3 1,4-Dioxane "U 2.0 U 200 U 2,3,4,6-Tetrachlorophenol "U 10 U 200 U 2,4,5-Trichlorophenol "U 10 U 200 U 2,4,6-Trichlorophenol "U 10 U 200 U 2,4-Dichlorophenol "U 10 U 200 U 2,4-Dimethylphenol "U 10 U 200 U 2,4-Dinitrophenol "U 20 U 200 U 2,4-Dinitrotoluene "U 10 U 200 U 2,6-Dinitrotoluene "U 10 U 200 U 2-Chloronaphthalene "U 10 U 200 U 2-Chlorophenol "U 10 U 200 U 2-Methyl-4,6-dinitrophenol "U 10 U 200 U 2-Methylphenol "U 10 U 200 U 2-Nitroaniline "U 10 U 200 U 2-Nitrophenol "U 10 U 200 U 3,3'-Dichlorobenzidine "U 10 U 200 U 3-Nitroaniline "U 10 U 200 U 4-Bromophenyl phenyl ether "U 10 U 200 U 4-Chloro-3-methylphenol "U 10 U 200 U 4-Chloroaniline "U 10 U 200 U 4-Chlorophenyl phenyl ether "U 10 U 200 U 4-Nitroaniline "U 10 U 200 U 4-Nitrophenol "U 10 U 200 U Acenaphthylene "U 2.0 U 200 U Acetophenone "U 10 U 200 U Anthracene "3.3831 2.0 3.7158 2009.37 Atrazine "U 10 U 200 U Benzaldehyde "U 10 U 200 U Benzo(a)anthracene "U 2.0 U 200 U Benzo(a)pyrene "U 2.0 U 200 U Benzo(b)fluoranthene "U 2.0 U 200 U Benzo(g,h,i)perylene "U 2.0 U 200 U Benzo(k)fluoranthene "U 2.0 U 200 U Benzyl alcohol "U 10 U 200 U Benzyl butyl phthalate "U 10 U 200 QL-3, J, U Bis(2-chloro-1-methylethyl) ether "U 10 U 200 U 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 23 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2108002 - E 3520 LLE Duplicate (2108002-DUP1)Prepared: 08/02/21 Analyzed: 08/03/21 Source: E213107-01 Bis(2-chloroethoxy)methane ug/LU10 U 200 U bis(2-Chloroethyl) Ether "U 10 U 200 U Bis(2-ethylhexyl) phthalate "U 10 U 200 U Caprolactam "U 10 U 200 U Chrysene "U 2.0 U 200 U Dibenz(a,h)anthracene "U 2.0 U 200 U Diethyl phthalate "U 10 U 200 U Dimethyl phthalate "U 10 U 200 U Di-n-butylphthalate "U 10 U 200 U Di-n-octylphthalate "U 10 U 200 U Fluoranthene "9.1244 2.0 10.463 20013.7 Hexachlorobenzene (HCB)"U 10 U 200 QL-3, J, U Hexachlorocyclopentadiene (HCCP)"U 10 U 200 U Hexachloroethane "U 10 U 200 U Indeno (1,2,3-cd) pyrene "U 2.0 U 200 U Isophorone "U 10 U 200 U Nitrobenzene "U 10 U 200 U n-Nitroso di-n-Propylamine "U 10 U 200 U n-Nitrosodiphenylamine/Diphenylamine "U 10 U 200 U Pentachlorophenol "U 10 U 200 U Phenol "U 10 U 200 U Pyrene "4.9950 2.0 5.5895 20011.2 Dimethylnaphthalene (TIC)"61.891 65.684 NJ5.95 Phenanthridinone (TIC)"12.637 11.895 NJ6.05 Tentatively Identified Compounds "U 10 U 200 U Thebenidinone (TIC)"19.602 NJ200 Duplicate (2108002-DUP2)Prepared: 08/02/21 Analyzed: 08/03/21 Source: E213107-01RE1 EPA 8270D 1-Methylnaphthalene ug/L404.18 40 421.89 2004.29 2-Methylnaphthalene "779.50 40 807.58 2003.54 Acenaphthene "454.13 40 466.11 2002.60 Carbazole "134.53 40 142.95 2006.07 Dibenzofuran "260.70 40 262.11 2000.539 Fluorene "177.11 40 185.47 2004.61 Phenanthrene "200.40 40 210.53 2004.93 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 24 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2108002 - E 3520 LLE Duplicate (2108002-DUP3)Prepared: 08/02/21 Analyzed: 08/05/21 Source: E213107-01RE2 EPA 8270D Naphthalene ug/L5023.9 200 5062.1 2000.758 MRL Verification (2108002-PS1)Prepared: 08/02/21 Analyzed: 08/03/21 EPA 8270D (3-and/or 4-)Methylphenol ug/L6.7600 10 10.000 MRL-2, J48-10567.6 1,1-Biphenyl "1.3800 2.0 2.0000 MRL-2, J50-10469.0 1,4-Dioxane "1.0700 2.0 2.0000 MRL-2, J14-11053.5 1-Methylnaphthalene "1.3100 2.0 2.0000 MRL-2, J56-11765.5 2,3,4,6-Tetrachlorophenol "8.2600 10 10.000 MRL-2, J31-11182.6 2,4,5-Trichlorophenol "7.5000 10 10.000 MRL-2, J42-11575.0 2,4,6-Trichlorophenol "7.3500 10 10.000 MRL-2, J47-11073.5 2,4-Dichlorophenol "7.0600 10 10.000 MRL-2, J49-11670.6 2,4-Dimethylphenol "5.9900 10 10.000 MRL-2, J16-11159.9 2,4-Dinitrophenol "16.670 20 20.000 MRL-2, J10-12483.4 2,4-Dinitrotoluene "7.6200 10 10.000 MRL-2, J53-10876.2 2,6-Dinitrotoluene "7.7500 10 10.000 MRL-2, J55-10677.5 2-Chloronaphthalene "7.1600 10 10.000 MRL-2, J51-10471.6 2-Chlorophenol "6.9600 10 10.000 MRL-2, J46-11169.6 2-Methyl-4,6-dinitrophenol "8.0600 10 10.000 MRL-2, J26-11680.6 2-Methylnaphthalene "1.2100 2.0 2.0000 MRL-2, J51-10660.5 2-Methylphenol "7.1500 10 10.000 MRL-2, J42-10871.5 2-Nitroaniline "8.9600 10 10.000 MRL-2, J48-10989.6 2-Nitrophenol "6.9100 10 10.000 MRL-2, J46-12069.1 3,3'-Dichlorobenzidine "5.6600 10 10.000 MRL-2, J10-10356.6 3-Nitroaniline "8.7400 10 10.000 MRL-2, J28-11887.4 4-Bromophenyl phenyl ether "8.2400 10 10.000 MRL-2, J58-10682.4 4-Chloro-3-methylphenol "7.2200 10 10.000 MRL-2, J49-11872.2 4-Chloroaniline "4.9800 10 10.000 MRL-2, J20-8549.8 4-Chlorophenyl phenyl ether "7.9700 10 10.000 MRL-2, J49-10279.7 4-Nitroaniline "10.120 10 10.000 MRL-210-165101 4-Nitrophenol "8.2200 10 10.000 MRL-2, J11-11682.2 Acenaphthene "1.3600 2.0 2.0000 MRL-2, J51-10068.0 Acenaphthylene "1.3600 2.0 2.0000 MRL-2, J52-10468.0 Acetophenone "7.2700 10 10.000 MRL-2, J56-10872.7 Anthracene "1.4100 2.0 2.0000 MRL-2, J48-10870.5 Atrazine "5.4600 10 10.000 MRL-2, J46-12654.6 Benzaldehyde "12.350 10 10.000 MRL-2, QC-2 40-169124 Benzo(a)anthracene "1.4700 2.0 2.0000 MRL-2, J52-11773.5 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 25 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2108002 - E 3520 LLE MRL Verification (2108002-PS1)Prepared: 08/02/21 Analyzed: 08/03/21 Benzo(a)pyrene ug/L1.5900 2.0 2.0000 MRL-2, J48-11679.5 Benzo(b)fluoranthene "1.7500 2.0 2.0000 MRL-2, J31-14287.5 Benzo(g,h,i)perylene "1.6400 2.0 2.0000 MRL-2, J37-11582.0 Benzo(k)fluoranthene "1.5000 2.0 2.0000 MRL-2, J29-14575.0 Benzyl alcohol "7.2300 10 10.000 MRL-2, J12-13372.3 Benzyl butyl phthalate "10.110 10 10.000 MRL-260-136101 Bis(2-chloro-1-methylethyl) ether "8.7900 10 10.000 MRL-2, J48-10787.9 Bis(2-chloroethoxy)methane "7.3200 10 10.000 MRL-2, J53-10773.2 bis(2-Chloroethyl) Ether "8.6700 10 10.000 MRL-2, J47-10486.7 Bis(2-ethylhexyl) phthalate "9.1400 10 10.000 MRL-2, J19-17991.4 Caprolactam "7.0200 10 10.000 MRL-2, J32-8770.2 Carbazole "1.3700 2.0 2.0000 MRL-2, J67-11968.5 Chrysene "1.5900 2.0 2.0000 MRL-2, J55-11679.5 Dibenz(a,h)anthracene "1.2600 2.0 2.0000 MRL-2, J33-11863.0 Dibenzofuran "1.3000 2.0 2.0000 MRL-2, J53-11365.0 Diethyl phthalate "8.9400 10 10.000 MRL-2, J53-12989.4 Dimethyl phthalate "8.0500 10 10.000 MRL-2, J59-10780.5 Di-n-butylphthalate "9.3500 10 10.000 MRL-2, J69-13993.5 Di-n-octylphthalate "9.5000 10 10.000 MRL-2, J62-12995.0 Fluoranthene "1.4100 2.0 2.0000 MRL-2, J60-11270.5 Fluorene "1.3300 2.0 2.0000 MRL-2, J55-10166.5 Hexachlorobenzene (HCB)"8.1200 10 10.000 MRL-2, J50-10581.2 Hexachlorocyclopentadiene (HCCP)"6.8700 10 10.000 MRL-2, J10-8568.7 Hexachloroethane "4.8400 10 10.000 MRL-2, J26-8948.4 Indeno (1,2,3-cd) pyrene "1.5600 2.0 2.0000 MRL-2, J37-11478.0 Isophorone "7.9600 10 10.000 MRL-2, J54-10879.6 Naphthalene "1.4900 2.0 2.0000 MRL-2, J38-13774.5 Nitrobenzene "7.5900 10 10.000 MRL-2, J54-11075.9 n-Nitroso di-n-Propylamine "8.1800 10 10.000 MRL-2, J49-10681.8 n-Nitrosodiphenylamine/Diphenylamine "7.3300 10 10.000 MRL-2, J55-10773.3 Pentachlorophenol "8.1200 10 10.000 MRL-2, J20-13681.2 Phenanthrene "1.4000 2.0 2.0000 MRL-2, J55-11570.0 Phenol "7.2800 10 10.000 MRL-2, J44-9772.8 Pyrene "1.5800 2.0 2.0000 MRL-2, J51-12279.0 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 26 of 27 D.A.R.T. Id: 21-0304 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0304, Holcomb Creosote - Reported by Stacie Masters Notes and Definitions for QC Samples U The analyte was not detected at or above the reporting limit. J The identification of the analyte is acceptable; the reported value is an estimate. MRL-2 MRL verification for Non-Potable Water matrix NJ Presumptive evidence that analyte is present; reported as a tentative identification with an estimated value. QC-2 Analyte concentration high in continuing calibration verification standard QL-3 Laboratory Control Spike Precision outside method control limits 8/12/21 17:02E213107 SVOA FINAL 08 12 21 1702Page 27 of 27 D.A.R.T. Id: 22-0051 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0051, Holcomb Creosote - Reported by Denise Goddard February 2, 2022 MEMORANDUM SUBJECT: FROM: FINAL Analytical Report Project: 22-0051, Holcomb Creosote 4LSASD-QAPSB Denise Goddard Quality Assurance Section, Chemist Quality Assurance Section Floyd Wellborn, ChiefTHRU: TO:Joydeb Majumder Attached are the final results for the analytical groups listed below. These analyses were performed in accordance with the associated contract Statement Of Work (SOW). In general, project data quality objectives have not been used to evaluate these data prior to release by the Quality Assurance Section. For a listing of specific data qualifiers and explanations, please refer to the Data Qualifier Definitions included in this report. Analyses Included in this report:Method Used: Dissolved Metals (DMTL) Dissolved Metals Contract SOW (Water) Total Metals (TMTL) Total Metals CLP Inorganics (Water) 2/2/22 10:15C215305 DMTL TMTL FINAL 02 02 22 1015Page 1 of 20 D.A.R.T. Id: 22-0051 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0051, Holcomb Creosote - Reported by Denise Goddard Report Narrative for Work Order: C215305 Analysis: DMTL Inorganic Data Review and Validation Report Site Name: Holcomb Creosote, Yadkinville, NC Case No.: 49820, Project No.: 22-0051, Work Order Nos.: C215304 (PES), C215305 ELEMENT Sample IDs.: C215304-01-02 (PES), C215305-01-16 Sampling Date(s): 9/14/21-10/13/21 Validated Time of Sample Receipt: 12/1/21 Laboratory Performing Inorganic Analyses: Chemtech Consulting Group, Mountainside, NJ Date Received from Lab: 12/21/21 (SMO portal) Analyses conducted: Total Metals and Dissolved Metals (ICP-AES) The ESAT Work Team has reviewed the above-captioned CLP data package consisting of 18 water samples for total and/or dissolved metals by ICP-AES analyses according to the contract Statement of Work SFAM01.1 (SOW) and EPA guidelines. This package presents acceptable contractual and technical performance with qualifications. Additional details are provided below. The samples were collected between 9/14/21 and 10/13/21 but were not received by the laboratory until 12/1/21. Examination of laboratory blanks revealed apparent low-level contamination with several metals. Reported detection limits were adjusted as high as ten times the blank levels to discount possible false positives due to contamination in laboratory blanks. ICP-AES Analysis PE Sample Results The PES recoveries for total metals were scored as within limits by the web-based SPS Web software except for chromium which was scored warning high in one PES only. All detected chromium results were considered estimated and “J” qualified. Other QA/QC Results The sampler did not use separate CLP Nos. as instructed for total and dissolved metals samples so the laboratory was instructed to do so. Generally, the total metals results were approximately the same results or greater than dissolved metals as expected. However, manganese was reported as 19,000 ug/L in sample C215305-16 (DBLS6 - dissolved) but 4600 ug/L in sample C215305-15 (DBLR5 - total) for MW-6_101321 collected 10/13/21 at 15:18. The pH for both samples was measured as <2 by laboratory at the time of digestion. These reported results were consistent with the raw data submitted. The laboratory addressed this issue stating that both the samples were analyzed again and “got the same results… [and] suspects the sampler might have accidentally interchanged total for dissolved and dissolved for total for those two samples as we could see clearly that the digestate for total metals is lighter in color and the digestate for dissolved is darker.” A Stage 4 validation consisting of manual review was performed on the inorganic samples submitted for this case. cc: Nardina Turner 2/2/22 10:15C215305 DMTL TMTL FINAL 02 02 22 1015Page 2 of 20 D.A.R.T. Id: 22-0051 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0051, Holcomb Creosote - Reported by Denise Goddard Date CollectedMatrixLaboratory IDSample ID SAMPLES INCLUDED IN THIS REPORT Project: 22-0051, Holcomb Creosote Contract Lab Case: 49820 MD#D# BLR1BLR1MW-2_091421 C215305-01 Groundwater 9/14/21 13:13 BLS2BLS2MW-2_091421_Dis C215305-02 Groundwater 9/14/21 13:13 BLR8BLR8MW-2_101321 C215305-03 Groundwater 10/13/21 15:25 BLS3BLS3MW-2_101321_Dis C215305-04 Groundwater 10/13/21 15:25 BLR2BLR2MW-57_091421 C215305-05 Groundwater 9/14/21 14:20 BLS0BLS0MW-57_091421_Dis C215305-06 Groundwater 9/14/21 14:20 BLR7BLR7MW-57_101321 C215305-07 Groundwater 10/13/21 17:10 BLS4BLS4MW-57_101321_Dis C215305-08 Groundwater 10/13/21 17:10 BLR3BLR3MW-58_091421 C215305-09 Groundwater 9/14/21 15:38 BLR9BLR9MW-58_091421_Dis C215305-10 Groundwater 9/14/21 15:38 BLR6BLR6MW-58_101321 C215305-11 Groundwater 10/13/21 17:28 BLS5BLS5MW-58_101321_Dis C215305-12 Groundwater 10/13/21 17:28 BLR4BLR4MW-6_091421 C215305-13 Groundwater 9/14/21 17:09 BLS1BLS1MW-6_091421_Dis C215305-14 Groundwater 9/14/21 17:09 BLR5BLR5MW-6_101321 C215305-15 Groundwater 10/13/21 15:18 BLS6BLS6MW-6_101321_Dis C215305-16 Groundwater 10/13/21 15:18 2/2/22 10:15C215305 DMTL TMTL FINAL 02 02 22 1015Page 3 of 20 D.A.R.T. Id: 22-0051 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0051, Holcomb Creosote - Reported by Denise Goddard DATA QUALIFIER DEFINITIONS U The analyte was not detected at or above the reporting limit. CLP26 PE sample recovery scored as warning-high. CLP36 Identification/Concentration of analyte not confirmed by ICP-MS. J The identification of the analyte is acceptable; the reported value is an estimate. Q-2 Result greater than MDL but less than MRL. ACRONYMS AND ABBREVIATIONS CAS Chemical Abstracts Service Note: Analytes with no known CAS identifiers have been assigned codes beginning with "E", the EPA ID as assigned by the EPA Substance Registry System (www.epa.gov/srs), or beginning with "R4-", a unique identifier assigned by the EPA Region 4 laboratory. MDL Method Detection Limit - The minimum concentration of a substance (an analyte) that can be measured and reported with a 99% confidence that the analyte concentration is greater than zero. MRL Minimum Reporting Limit - Analyte concentration that corresponds to the lowest demonstrated level of acceptable quantitation. The MRL is sample-specific and accounts for preparation weights and volumes, dilutions, and moisture content of soil/sediments. TIC Tentatively Identified Compound - An analyte identified based on a match with the instrument software's mass spectral library. A calibration standard has not been analyzed to confirm the compound's identification or the estimated concentration reported. 2/2/22 10:15C215305 DMTL TMTL FINAL 02 02 22 1015Page 4 of 20 D.A.R.T. Id: 22-0051 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0051, Holcomb Creosote - Reported by Denise Goddard Total Metals Sample ID:Lab ID: MW-2_091421 C215305-01 Matrix:Groundwater Date Collected:9/14/21 13:13 Project: 22-0051, Holcomb Creosote Contract Lab Case: 49820 D No: BLR1 CHX MD No: BLR1 CHX Station ID:MW-2 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/01/21Aluminumug/L 12/07/21 CLP SFAM01.1 P200U7429-90-5 60 12/01/21Antimonyug/L 12/07/21 CLP SFAM01.1 P60U7440-36-0 10 12/01/21Arsenicug/L 12/07/21 CLP SFAM01.1 P10U7440-38-2 200 12/01/21Bariumug/L 12/07/21 CLP SFAM01.1 P58J, Q-27440-39-3 5.0 12/01/21Berylliumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/01/21Cadmiumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-43-9 5000 12/01/21Calciumug/L 12/07/21 CLP SFAM01.1 P54007440-70-2 10 12/01/21Chromiumug/L 12/07/21 CLP SFAM01.1 P10U7440-47-3 50 12/01/21Cobaltug/L 12/07/21 CLP SFAM01.1 P16J, Q-27440-48-4 25 12/01/21Copperug/L 12/07/21 CLP SFAM01.1 P25U7440-50-8 100 12/01/21Ironug/L 12/07/21 CLP SFAM01.1 P130007439-89-6 10 12/01/21Leadug/L 12/07/21 CLP SFAM01.1 P10U7439-92-1 5000 12/01/21Magnesiumug/L 12/07/21 CLP SFAM01.1 P1300J, Q-27439-95-4 15 12/01/21Manganeseug/L 12/07/21 CLP SFAM01.1 P27007439-96-5 40 12/01/21Nickelug/L 12/07/21 CLP SFAM01.1 P40U7440-02-0 5000 12/01/21Potassiumug/L 12/07/21 CLP SFAM01.1 P2500J, Q-27440-09-7 35 12/01/21Seleniumug/L 12/07/21 CLP SFAM01.1 P35U7782-49-2 10 12/01/21Silverug/L 12/07/21 CLP SFAM01.1 P10U7440-22-4 5000 12/01/21Sodiumug/L 12/07/21 CLP SFAM01.1 P76007440-23-5 25 12/01/21Thalliumug/L 12/07/21 CLP SFAM01.1 P25U7440-28-0 50 12/01/21Vanadiumug/L 12/07/21 CLP SFAM01.1 P50U7440-62-2 60 12/01/21Zincug/L 12/07/21 CLP SFAM01.1 P60U7440-66-6 2/2/22 10:15C215305 DMTL TMTL FINAL 02 02 22 1015Page 5 of 20 D.A.R.T. Id: 22-0051 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0051, Holcomb Creosote - Reported by Denise Goddard Dissolved Metals Sample ID:Lab ID: MW-2_091421_Dis C215305-02 Matrix:Groundwater Date Collected:9/14/21 13:13 Project: 22-0051, Holcomb Creosote Contract Lab Case: 49820 D No: BLS2 CHX MD No: BLS2 CHX Station ID:MW-2 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/06/21Aluminumug/L 12/07/21 CLP SFAM01.1 P200U7429-90-5 60 12/06/21Antimonyug/L 12/07/21 CLP SFAM01.1 P60U7440-36-0 10 12/06/21Arsenicug/L 12/07/21 CLP SFAM01.1 P10U7440-38-2 200 12/06/21Bariumug/L 12/07/21 CLP SFAM01.1 P59J, Q-27440-39-3 5.0 12/06/21Berylliumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/06/21Cadmiumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-43-9 5000 12/06/21Calciumug/L 12/07/21 CLP SFAM01.1 P55007440-70-2 10 12/06/21Chromiumug/L 12/07/21 CLP SFAM01.1 P10U7440-47-3 50 12/06/21Cobaltug/L 12/07/21 CLP SFAM01.1 P15J, Q-27440-48-4 25 12/06/21Copperug/L 12/07/21 CLP SFAM01.1 P25U7440-50-8 100 12/06/21Ironug/L 12/07/21 CLP SFAM01.1 P130007439-89-6 10 12/06/21Leadug/L 12/07/21 CLP SFAM01.1 P10U7439-92-1 5000 12/06/21Magnesiumug/L 12/07/21 CLP SFAM01.1 P1400J, Q-27439-95-4 15 12/06/21Manganeseug/L 12/08/21 CLP SFAM01.1 P29007439-96-5 40 12/06/21Nickelug/L 12/07/21 CLP SFAM01.1 P40U7440-02-0 5000 12/06/21Potassiumug/L 12/07/21 CLP SFAM01.1 P2500J, Q-27440-09-7 35 12/06/21Seleniumug/L 12/07/21 CLP SFAM01.1 P35U7782-49-2 10 12/06/21Silverug/L 12/07/21 CLP SFAM01.1 P10U7440-22-4 5000 12/06/21Sodiumug/L 12/07/21 CLP SFAM01.1 P79007440-23-5 25 12/06/21Thalliumug/L 12/07/21 CLP SFAM01.1 P25U7440-28-0 50 12/06/21Vanadiumug/L 12/07/21 CLP SFAM01.1 P50U7440-62-2 60 12/06/21Zincug/L 12/07/21 CLP SFAM01.1 P60U7440-66-6 2/2/22 10:15C215305 DMTL TMTL FINAL 02 02 22 1015Page 6 of 20 D.A.R.T. Id: 22-0051 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0051, Holcomb Creosote - Reported by Denise Goddard Total Metals Sample ID:Lab ID: MW-2_101321 C215305-03 Matrix:Groundwater Date Collected:10/13/21 15:25 Project: 22-0051, Holcomb Creosote Contract Lab Case: 49820 D No: BLR8 CHX MD No: BLR8 CHX Station ID:MW-2 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/01/21Aluminumug/L 12/07/21 CLP SFAM01.1 P2807429-90-5 60 12/01/21Antimonyug/L 12/07/21 CLP SFAM01.1 P60U7440-36-0 10 12/01/21Arsenicug/L 12/07/21 CLP SFAM01.1 P10U7440-38-2 200 12/01/21Bariumug/L 12/07/21 CLP SFAM01.1 P69J, Q-27440-39-3 5.0 12/01/21Berylliumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/01/21Cadmiumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-43-9 5000 12/01/21Calciumug/L 12/07/21 CLP SFAM01.1 P63007440-70-2 10 12/01/21Chromiumug/L 12/07/21 CLP SFAM01.1 P10U7440-47-3 50 12/01/21Cobaltug/L 12/07/21 CLP SFAM01.1 P19J, Q-27440-48-4 25 12/01/21Copperug/L 12/07/21 CLP SFAM01.1 P25U7440-50-8 100 12/01/21Ironug/L 12/07/21 CLP SFAM01.1 P150007439-89-6 10 12/01/21Leadug/L 12/07/21 CLP SFAM01.1 P10U7439-92-1 5000 12/01/21Magnesiumug/L 12/07/21 CLP SFAM01.1 P1800J, Q-27439-95-4 15 12/01/21Manganeseug/L 12/07/21 CLP SFAM01.1 P36007439-96-5 40 12/01/21Nickelug/L 12/07/21 CLP SFAM01.1 P40U7440-02-0 5000 12/01/21Potassiumug/L 12/07/21 CLP SFAM01.1 P2900J, Q-27440-09-7 35 12/01/21Seleniumug/L 12/07/21 CLP SFAM01.1 P35U7782-49-2 10 12/01/21Silverug/L 12/07/21 CLP SFAM01.1 P10U7440-22-4 5000 12/01/21Sodiumug/L 12/07/21 CLP SFAM01.1 P86007440-23-5 25 12/01/21Thalliumug/L 12/07/21 CLP SFAM01.1 P25U7440-28-0 50 12/01/21Vanadiumug/L 12/07/21 CLP SFAM01.1 P50U7440-62-2 60 12/01/21Zincug/L 12/07/21 CLP SFAM01.1 P60U7440-66-6 2/2/22 10:15C215305 DMTL TMTL FINAL 02 02 22 1015Page 7 of 20 D.A.R.T. Id: 22-0051 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0051, Holcomb Creosote - Reported by Denise Goddard Dissolved Metals Sample ID:Lab ID: MW-2_101321_Dis C215305-04 Matrix:Groundwater Date Collected:10/13/21 15:25 Project: 22-0051, Holcomb Creosote Contract Lab Case: 49820 D No: BLS3 CHX MD No: BLS3 CHX Station ID:MW-2 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/06/21Aluminumug/L 12/07/21 CLP SFAM01.1 P200U7429-90-5 60 12/06/21Antimonyug/L 12/07/21 CLP SFAM01.1 P60U7440-36-0 10 12/06/21Arsenicug/L 12/07/21 CLP SFAM01.1 P10U7440-38-2 200 12/06/21Bariumug/L 12/07/21 CLP SFAM01.1 P63J, Q-27440-39-3 5.0 12/06/21Berylliumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/06/21Cadmiumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-43-9 5000 12/06/21Calciumug/L 12/07/21 CLP SFAM01.1 P63007440-70-2 10 12/06/21Chromiumug/L 12/07/21 CLP SFAM01.1 P10U7440-47-3 50 12/06/21Cobaltug/L 12/07/21 CLP SFAM01.1 P19J, Q-27440-48-4 25 12/06/21Copperug/L 12/07/21 CLP SFAM01.1 P25U7440-50-8 100 12/06/21Ironug/L 12/07/21 CLP SFAM01.1 P150007439-89-6 10 12/06/21Leadug/L 12/07/21 CLP SFAM01.1 P10U7439-92-1 5000 12/06/21Magnesiumug/L 12/07/21 CLP SFAM01.1 P1700J, Q-27439-95-4 15 12/06/21Manganeseug/L 12/08/21 CLP SFAM01.1 P35007439-96-5 40 12/06/21Nickelug/L 12/07/21 CLP SFAM01.1 P40U7440-02-0 5000 12/06/21Potassiumug/L 12/07/21 CLP SFAM01.1 P2700J, Q-27440-09-7 35 12/06/21Seleniumug/L 12/07/21 CLP SFAM01.1 P35U7782-49-2 10 12/06/21Silverug/L 12/07/21 CLP SFAM01.1 P10U7440-22-4 5000 12/06/21Sodiumug/L 12/07/21 CLP SFAM01.1 P86007440-23-5 25 12/06/21Thalliumug/L 12/07/21 CLP SFAM01.1 P25U7440-28-0 50 12/06/21Vanadiumug/L 12/07/21 CLP SFAM01.1 P50U7440-62-2 60 12/06/21Zincug/L 12/07/21 CLP SFAM01.1 P60U7440-66-6 2/2/22 10:15C215305 DMTL TMTL FINAL 02 02 22 1015Page 8 of 20 D.A.R.T. Id: 22-0051 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0051, Holcomb Creosote - Reported by Denise Goddard Total Metals Sample ID:Lab ID: MW-57_091421 C215305-05 Matrix:Groundwater Date Collected:9/14/21 14:20 Project: 22-0051, Holcomb Creosote Contract Lab Case: 49820 D No: BLR2 CHX MD No: BLR2 CHX Station ID:MW-57 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/01/21Aluminumug/L 12/07/21 CLP SFAM01.1 P200U7429-90-5 60 12/01/21Antimonyug/L 12/07/21 CLP SFAM01.1 P60U7440-36-0 10 12/01/21Arsenicug/L 12/07/21 CLP SFAM01.1 P10U7440-38-2 200 12/01/21Bariumug/L 12/07/21 CLP SFAM01.1 P62J, Q-27440-39-3 5.0 12/01/21Berylliumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/01/21Cadmiumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-43-9 5000 12/01/21Calciumug/L 12/07/21 CLP SFAM01.1 P63007440-70-2 10 12/01/21Chromiumug/L 12/07/21 CLP SFAM01.1 P10U7440-47-3 50 12/01/21Cobaltug/L 12/07/21 CLP SFAM01.1 P50U7440-48-4 25 12/01/21Copperug/L 12/07/21 CLP SFAM01.1 P25U7440-50-8 100 12/01/21Ironug/L 12/07/21 CLP SFAM01.1 P9007439-89-6 10 12/01/21Leadug/L 12/07/21 CLP SFAM01.1 P10U7439-92-1 5000 12/01/21Magnesiumug/L 12/07/21 CLP SFAM01.1 P1400J, Q-27439-95-4 15 12/01/21Manganeseug/L 12/07/21 CLP SFAM01.1 P8207439-96-5 40 12/01/21Nickelug/L 12/07/21 CLP SFAM01.1 P40U7440-02-0 5000 12/01/21Potassiumug/L 12/07/21 CLP SFAM01.1 P1600J, Q-27440-09-7 35 12/01/21Seleniumug/L 12/07/21 CLP SFAM01.1 P35U7782-49-2 10 12/01/21Silverug/L 12/07/21 CLP SFAM01.1 P10U7440-22-4 5000 12/01/21Sodiumug/L 12/07/21 CLP SFAM01.1 P74007440-23-5 25 12/01/21Thalliumug/L 12/07/21 CLP SFAM01.1 P25U7440-28-0 50 12/01/21Vanadiumug/L 12/07/21 CLP SFAM01.1 P50U7440-62-2 60 12/01/21Zincug/L 12/07/21 CLP SFAM01.1 P60U7440-66-6 2/2/22 10:15C215305 DMTL TMTL FINAL 02 02 22 1015Page 9 of 20 D.A.R.T. Id: 22-0051 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0051, Holcomb Creosote - Reported by Denise Goddard Dissolved Metals Sample ID:Lab ID: MW-57_091421_Dis C215305-06 Matrix:Groundwater Date Collected:9/14/21 14:20 Project: 22-0051, Holcomb Creosote Contract Lab Case: 49820 D No: BLS0 CHX MD No: BLS0 CHX Station ID:MW-57 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/06/21Aluminumug/L 12/07/21 CLP SFAM01.1 P200U7429-90-5 60 12/06/21Antimonyug/L 12/07/21 CLP SFAM01.1 P60U7440-36-0 10 12/06/21Arsenicug/L 12/07/21 CLP SFAM01.1 P10U7440-38-2 200 12/06/21Bariumug/L 12/07/21 CLP SFAM01.1 P61J, Q-27440-39-3 5.0 12/06/21Berylliumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/06/21Cadmiumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-43-9 5000 12/06/21Calciumug/L 12/07/21 CLP SFAM01.1 P63007440-70-2 10 12/06/21Chromiumug/L 12/07/21 CLP SFAM01.1 P10U7440-47-3 50 12/06/21Cobaltug/L 12/07/21 CLP SFAM01.1 P50U7440-48-4 25 12/06/21Copperug/L 12/07/21 CLP SFAM01.1 P25U7440-50-8 100 12/06/21Ironug/L 12/07/21 CLP SFAM01.1 P8507439-89-6 10 12/06/21Leadug/L 12/07/21 CLP SFAM01.1 P10U7439-92-1 5000 12/06/21Magnesiumug/L 12/07/21 CLP SFAM01.1 P1400J, Q-27439-95-4 15 12/06/21Manganeseug/L 12/08/21 CLP SFAM01.1 P8807439-96-5 40 12/06/21Nickelug/L 12/07/21 CLP SFAM01.1 P40U7440-02-0 5000 12/06/21Potassiumug/L 12/07/21 CLP SFAM01.1 P1500J, Q-27440-09-7 35 12/06/21Seleniumug/L 12/07/21 CLP SFAM01.1 P35U7782-49-2 10 12/06/21Silverug/L 12/07/21 CLP SFAM01.1 P10U7440-22-4 5000 12/06/21Sodiumug/L 12/07/21 CLP SFAM01.1 P73007440-23-5 25 12/06/21Thalliumug/L 12/07/21 CLP SFAM01.1 P25U7440-28-0 50 12/06/21Vanadiumug/L 12/07/21 CLP SFAM01.1 P50U7440-62-2 60 12/06/21Zincug/L 12/07/21 CLP SFAM01.1 P60U7440-66-6 2/2/22 10:15C215305 DMTL TMTL FINAL 02 02 22 1015Page 10 of 20 D.A.R.T. Id: 22-0051 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0051, Holcomb Creosote - Reported by Denise Goddard Total Metals Sample ID:Lab ID: MW-57_101321 C215305-07 Matrix:Groundwater Date Collected:10/13/21 17:10 Project: 22-0051, Holcomb Creosote Contract Lab Case: 49820 D No: BLR7 CHX MD No: BLR7 CHX Station ID:MW-57 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/01/21Aluminumug/L 12/07/21 CLP SFAM01.1 P200U7429-90-5 60 12/01/21Antimonyug/L 12/07/21 CLP SFAM01.1 P60U7440-36-0 10 12/01/21Arsenicug/L 12/07/21 CLP SFAM01.1 P7.3 J, CLP36, Q-27440-38-2 200 12/01/21Bariumug/L 12/07/21 CLP SFAM01.1 P7107440-39-3 5.0 12/01/21Berylliumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/01/21Cadmiumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-43-9 5000 12/01/21Calciumug/L 12/07/21 CLP SFAM01.1 P1500007440-70-2 10 12/01/21Chromiumug/L 12/07/21 CLP SFAM01.1 P150J, CLP267440-47-3 50 12/01/21Cobaltug/L 12/07/21 CLP SFAM01.1 P50U7440-48-4 25 12/01/21Copperug/L 12/07/21 CLP SFAM01.1 P25U7440-50-8 100 12/01/21Ironug/L 12/07/21 CLP SFAM01.1 P100U7439-89-6 10 12/01/21Leadug/L 12/07/21 CLP SFAM01.1 P317439-92-1 5000 12/01/21Magnesiumug/L 12/07/21 CLP SFAM01.1 P390007439-95-4 750 12/01/21Manganeseug/L 12/07/21 CLP SFAM01.1 P3300007439-96-5 40 12/01/21Nickelug/L 12/07/21 CLP SFAM01.1 P32J, Q-27440-02-0 5000 12/01/21Potassiumug/L 12/07/21 CLP SFAM01.1 P57007440-09-7 35 12/01/21Seleniumug/L 12/07/21 CLP SFAM01.1 P170CLP367782-49-2 10 12/01/21Silverug/L 12/07/21 CLP SFAM01.1 P787440-22-4 5000 12/01/21Sodiumug/L 12/07/21 CLP SFAM01.1 P980007440-23-5 25 12/01/21Thalliumug/L 12/07/21 CLP SFAM01.1 P130CLP367440-28-0 50 12/01/21Vanadiumug/L 12/07/21 CLP SFAM01.1 P50U7440-62-2 60 12/01/21Zincug/L 12/07/21 CLP SFAM01.1 P53J, Q-27440-66-6 2/2/22 10:15C215305 DMTL TMTL FINAL 02 02 22 1015Page 11 of 20 D.A.R.T. Id: 22-0051 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0051, Holcomb Creosote - Reported by Denise Goddard Dissolved Metals Sample ID:Lab ID: MW-57_101321_Dis C215305-08 Matrix:Groundwater Date Collected:10/13/21 17:10 Project: 22-0051, Holcomb Creosote Contract Lab Case: 49820 D No: BLS4 CHX MD No: BLS4 CHX Station ID:MW-57 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/06/21Aluminumug/L 12/07/21 CLP SFAM01.1 P200U7429-90-5 60 12/06/21Antimonyug/L 12/07/21 CLP SFAM01.1 P60U7440-36-0 10 12/06/21Arsenicug/L 12/07/21 CLP SFAM01.1 P8.2 J, CLP36, Q-27440-38-2 200 12/06/21Bariumug/L 12/07/21 CLP SFAM01.1 P5107440-39-3 5.0 12/06/21Berylliumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/06/21Cadmiumug/L 12/07/21 CLP SFAM01.1 P1.2 J, Q-27440-43-9 5000 12/06/21Calciumug/L 12/07/21 CLP SFAM01.1 P1600007440-70-2 10 12/06/21Chromiumug/L 12/07/21 CLP SFAM01.1 P160J, CLP267440-47-3 50 12/06/21Cobaltug/L 12/07/21 CLP SFAM01.1 P50U7440-48-4 25 12/06/21Copperug/L 12/07/21 CLP SFAM01.1 P25U7440-50-8 100 12/06/21Ironug/L 12/07/21 CLP SFAM01.1 P100U7439-89-6 10 12/06/21Leadug/L 12/07/21 CLP SFAM01.1 P347439-92-1 5000 12/06/21Magnesiumug/L 12/07/21 CLP SFAM01.1 P400007439-95-4 750 12/06/21Manganeseug/L 12/08/21 CLP SFAM01.1 P3600007439-96-5 40 12/06/21Nickelug/L 12/07/21 CLP SFAM01.1 P34J, Q-27440-02-0 5000 12/06/21Potassiumug/L 12/07/21 CLP SFAM01.1 P57007440-09-7 35 12/06/21Seleniumug/L 12/07/21 CLP SFAM01.1 P180CLP367782-49-2 10 12/06/21Silverug/L 12/07/21 CLP SFAM01.1 P837440-22-4 5000 12/06/21Sodiumug/L 12/07/21 CLP SFAM01.1 P1000007440-23-5 25 12/06/21Thalliumug/L 12/07/21 CLP SFAM01.1 P140CLP367440-28-0 50 12/06/21Vanadiumug/L 12/07/21 CLP SFAM01.1 P50U7440-62-2 60 12/06/21Zincug/L 12/07/21 CLP SFAM01.1 P41J, Q-27440-66-6 2/2/22 10:15C215305 DMTL TMTL FINAL 02 02 22 1015Page 12 of 20 D.A.R.T. Id: 22-0051 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0051, Holcomb Creosote - Reported by Denise Goddard Total Metals Sample ID:Lab ID: MW-58_091421 C215305-09 Matrix:Groundwater Date Collected:9/14/21 15:38 Project: 22-0051, Holcomb Creosote Contract Lab Case: 49820 D No: BLR3 CHX MD No: BLR3 CHX Station ID:MW-58 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/01/21Aluminumug/L 12/07/21 CLP SFAM01.1 P200U7429-90-5 60 12/01/21Antimonyug/L 12/07/21 CLP SFAM01.1 P60U7440-36-0 10 12/01/21Arsenicug/L 12/07/21 CLP SFAM01.1 P10U7440-38-2 200 12/01/21Bariumug/L 12/07/21 CLP SFAM01.1 P98J, Q-27440-39-3 5.0 12/01/21Berylliumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/01/21Cadmiumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-43-9 5000 12/01/21Calciumug/L 12/07/21 CLP SFAM01.1 P84007440-70-2 10 12/01/21Chromiumug/L 12/07/21 CLP SFAM01.1 P10U7440-47-3 50 12/01/21Cobaltug/L 12/07/21 CLP SFAM01.1 P50U7440-48-4 25 12/01/21Copperug/L 12/07/21 CLP SFAM01.1 P25U7440-50-8 100 12/01/21Ironug/L 12/07/21 CLP SFAM01.1 P26007439-89-6 10 12/01/21Leadug/L 12/07/21 CLP SFAM01.1 P10U7439-92-1 5000 12/01/21Magnesiumug/L 12/07/21 CLP SFAM01.1 P2300J, Q-27439-95-4 15 12/01/21Manganeseug/L 12/07/21 CLP SFAM01.1 P17007439-96-5 40 12/01/21Nickelug/L 12/07/21 CLP SFAM01.1 P40U7440-02-0 5000 12/01/21Potassiumug/L 12/07/21 CLP SFAM01.1 P2300J, Q-27440-09-7 35 12/01/21Seleniumug/L 12/07/21 CLP SFAM01.1 P35U7782-49-2 10 12/01/21Silverug/L 12/07/21 CLP SFAM01.1 P10U7440-22-4 5000 12/01/21Sodiumug/L 12/07/21 CLP SFAM01.1 P73007440-23-5 25 12/01/21Thalliumug/L 12/07/21 CLP SFAM01.1 P25U7440-28-0 50 12/01/21Vanadiumug/L 12/07/21 CLP SFAM01.1 P50U7440-62-2 60 12/01/21Zincug/L 12/07/21 CLP SFAM01.1 P60U7440-66-6 2/2/22 10:15C215305 DMTL TMTL FINAL 02 02 22 1015Page 13 of 20 D.A.R.T. Id: 22-0051 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0051, Holcomb Creosote - Reported by Denise Goddard Dissolved Metals Sample ID:Lab ID: MW-58_091421_Dis C215305-10 Matrix:Groundwater Date Collected:9/14/21 15:38 Project: 22-0051, Holcomb Creosote Contract Lab Case: 49820 D No: BLR9 CHX MD No: BLR9 CHX Station ID:MW-58 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/06/21Aluminumug/L 12/07/21 CLP SFAM01.1 P200U7429-90-5 60 12/06/21Antimonyug/L 12/07/21 CLP SFAM01.1 P60U7440-36-0 10 12/06/21Arsenicug/L 12/07/21 CLP SFAM01.1 P10U7440-38-2 200 12/06/21Bariumug/L 12/07/21 CLP SFAM01.1 P100J, Q-27440-39-3 5.0 12/06/21Berylliumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/06/21Cadmiumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-43-9 5000 12/06/21Calciumug/L 12/07/21 CLP SFAM01.1 P90007440-70-2 10 12/06/21Chromiumug/L 12/07/21 CLP SFAM01.1 P10U7440-47-3 50 12/06/21Cobaltug/L 12/07/21 CLP SFAM01.1 P50U7440-48-4 25 12/06/21Copperug/L 12/07/21 CLP SFAM01.1 P25U7440-50-8 100 12/06/21Ironug/L 12/07/21 CLP SFAM01.1 P25007439-89-6 10 12/06/21Leadug/L 12/07/21 CLP SFAM01.1 P10U7439-92-1 5000 12/06/21Magnesiumug/L 12/07/21 CLP SFAM01.1 P2400J, Q-27439-95-4 15 12/06/21Manganeseug/L 12/08/21 CLP SFAM01.1 P18007439-96-5 40 12/06/21Nickelug/L 12/07/21 CLP SFAM01.1 P40U7440-02-0 5000 12/06/21Potassiumug/L 12/07/21 CLP SFAM01.1 P2400J, Q-27440-09-7 35 12/06/21Seleniumug/L 12/07/21 CLP SFAM01.1 P35U7782-49-2 10 12/06/21Silverug/L 12/07/21 CLP SFAM01.1 P10U7440-22-4 5000 12/06/21Sodiumug/L 12/07/21 CLP SFAM01.1 P78007440-23-5 25 12/06/21Thalliumug/L 12/07/21 CLP SFAM01.1 P25U7440-28-0 50 12/06/21Vanadiumug/L 12/07/21 CLP SFAM01.1 P50U7440-62-2 60 12/06/21Zincug/L 12/07/21 CLP SFAM01.1 P60U7440-66-6 2/2/22 10:15C215305 DMTL TMTL FINAL 02 02 22 1015Page 14 of 20 D.A.R.T. Id: 22-0051 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0051, Holcomb Creosote - Reported by Denise Goddard Total Metals Sample ID:Lab ID: MW-58_101321 C215305-11 Matrix:Groundwater Date Collected:10/13/21 17:28 Project: 22-0051, Holcomb Creosote Contract Lab Case: 49820 D No: BLR6 CHX MD No: BLR6 CHX Station ID:MW-58 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/01/21Aluminumug/L 12/07/21 CLP SFAM01.1 P200U7429-90-5 60 12/01/21Antimonyug/L 12/07/21 CLP SFAM01.1 P60U7440-36-0 10 12/01/21Arsenicug/L 12/07/21 CLP SFAM01.1 P22CLP367440-38-2 200 12/01/21Bariumug/L 12/07/21 CLP SFAM01.1 P15007440-39-3 5.0 12/01/21Berylliumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/01/21Cadmiumug/L 12/07/21 CLP SFAM01.1 P2.8 J, Q-27440-43-9 5000 12/01/21Calciumug/L 12/07/21 CLP SFAM01.1 P1600007440-70-2 10 12/01/21Chromiumug/L 12/07/21 CLP SFAM01.1 P370J, CLP267440-47-3 50 12/01/21Cobaltug/L 12/07/21 CLP SFAM01.1 P50U7440-48-4 25 12/01/21Copperug/L 12/07/21 CLP SFAM01.1 P25U7440-50-8 100 12/01/21Ironug/L 12/07/21 CLP SFAM01.1 P100U7439-89-6 10 12/01/21Leadug/L 12/07/21 CLP SFAM01.1 P777439-92-1 5000 12/01/21Magnesiumug/L 12/07/21 CLP SFAM01.1 P380007439-95-4 1500 12/01/21Manganeseug/L 12/07/21 CLP SFAM01.1 P8400007439-96-5 40 12/01/21Nickelug/L 12/07/21 CLP SFAM01.1 P797440-02-0 5000 12/01/21Potassiumug/L 12/07/21 CLP SFAM01.1 P110007440-09-7 35 12/01/21Seleniumug/L 12/07/21 CLP SFAM01.1 P410CLP367782-49-2 10 12/01/21Silverug/L 12/07/21 CLP SFAM01.1 P2007440-22-4 5000 12/01/21Sodiumug/L 12/07/21 CLP SFAM01.1 P3700007440-23-5 25 12/01/21Thalliumug/L 12/07/21 CLP SFAM01.1 P320CLP367440-28-0 50 12/01/21Vanadiumug/L 12/07/21 CLP SFAM01.1 P50U7440-62-2 60 12/01/21Zincug/L 12/07/21 CLP SFAM01.1 P637440-66-6 2/2/22 10:15C215305 DMTL TMTL FINAL 02 02 22 1015Page 15 of 20 D.A.R.T. Id: 22-0051 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0051, Holcomb Creosote - Reported by Denise Goddard Dissolved Metals Sample ID:Lab ID: MW-58_101321_Dis C215305-12 Matrix:Groundwater Date Collected:10/13/21 17:28 Project: 22-0051, Holcomb Creosote Contract Lab Case: 49820 D No: BLS5 CHX MD No: BLS5 CHX Station ID:MW-58 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/06/21Aluminumug/L 12/07/21 CLP SFAM01.1 P200U7429-90-5 60 12/06/21Antimonyug/L 12/07/21 CLP SFAM01.1 P60U7440-36-0 10 12/06/21Arsenicug/L 12/07/21 CLP SFAM01.1 P22CLP367440-38-2 200 12/06/21Bariumug/L 12/07/21 CLP SFAM01.1 P13007440-39-3 5.0 12/06/21Berylliumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/06/21Cadmiumug/L 12/07/21 CLP SFAM01.1 P2.8 J, Q-27440-43-9 5000 12/06/21Calciumug/L 12/07/21 CLP SFAM01.1 P1600007440-70-2 10 12/06/21Chromiumug/L 12/07/21 CLP SFAM01.1 P390J, CLP267440-47-3 50 12/06/21Cobaltug/L 12/07/21 CLP SFAM01.1 P50U7440-48-4 25 12/06/21Copperug/L 12/07/21 CLP SFAM01.1 P25U7440-50-8 100 12/06/21Ironug/L 12/07/21 CLP SFAM01.1 P100U7439-89-6 10 12/06/21Leadug/L 12/07/21 CLP SFAM01.1 P787439-92-1 5000 12/06/21Magnesiumug/L 12/07/21 CLP SFAM01.1 P390007439-95-4 1500 12/06/21Manganeseug/L 12/08/21 CLP SFAM01.1 P8400007439-96-5 40 12/06/21Nickelug/L 12/07/21 CLP SFAM01.1 P817440-02-0 5000 12/06/21Potassiumug/L 12/07/21 CLP SFAM01.1 P110007440-09-7 35 12/06/21Seleniumug/L 12/07/21 CLP SFAM01.1 P420CLP367782-49-2 10 12/06/21Silverug/L 12/07/21 CLP SFAM01.1 P2007440-22-4 5000 12/06/21Sodiumug/L 12/07/21 CLP SFAM01.1 P3800007440-23-5 25 12/06/21Thalliumug/L 12/07/21 CLP SFAM01.1 P340CLP367440-28-0 50 12/06/21Vanadiumug/L 12/07/21 CLP SFAM01.1 P50U7440-62-2 60 12/06/21Zincug/L 12/07/21 CLP SFAM01.1 P47J, Q-27440-66-6 2/2/22 10:15C215305 DMTL TMTL FINAL 02 02 22 1015Page 16 of 20 D.A.R.T. Id: 22-0051 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0051, Holcomb Creosote - Reported by Denise Goddard Total Metals Sample ID:Lab ID: MW-6_091421 C215305-13 Matrix:Groundwater Date Collected:9/14/21 17:09 Project: 22-0051, Holcomb Creosote Contract Lab Case: 49820 D No: BLR4 CHX MD No: BLR4 CHX Station ID:MW-6 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/01/21Aluminumug/L 12/07/21 CLP SFAM01.1 P200U7429-90-5 60 12/01/21Antimonyug/L 12/07/21 CLP SFAM01.1 P60U7440-36-0 10 12/01/21Arsenicug/L 12/07/21 CLP SFAM01.1 P10U7440-38-2 200 12/01/21Bariumug/L 12/07/21 CLP SFAM01.1 P120J, Q-27440-39-3 5.0 12/01/21Berylliumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/01/21Cadmiumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-43-9 5000 12/01/21Calciumug/L 12/07/21 CLP SFAM01.1 P2300J, Q-27440-70-2 10 12/01/21Chromiumug/L 12/07/21 CLP SFAM01.1 P10U7440-47-3 50 12/01/21Cobaltug/L 12/07/21 CLP SFAM01.1 P50U7440-48-4 25 12/01/21Copperug/L 12/07/21 CLP SFAM01.1 P25U7440-50-8 100 12/01/21Ironug/L 12/07/21 CLP SFAM01.1 P54007439-89-6 10 12/01/21Leadug/L 12/07/21 CLP SFAM01.1 P10U7439-92-1 5000 12/01/21Magnesiumug/L 12/07/21 CLP SFAM01.1 P950J, Q-27439-95-4 15 12/01/21Manganeseug/L 12/07/21 CLP SFAM01.1 P18007439-96-5 40 12/01/21Nickelug/L 12/07/21 CLP SFAM01.1 P40U7440-02-0 5000 12/01/21Potassiumug/L 12/07/21 CLP SFAM01.1 P1600J, Q-27440-09-7 35 12/01/21Seleniumug/L 12/07/21 CLP SFAM01.1 P35U7782-49-2 10 12/01/21Silverug/L 12/07/21 CLP SFAM01.1 P10U7440-22-4 5000 12/01/21Sodiumug/L 12/07/21 CLP SFAM01.1 P83007440-23-5 25 12/01/21Thalliumug/L 12/07/21 CLP SFAM01.1 P25U7440-28-0 50 12/01/21Vanadiumug/L 12/07/21 CLP SFAM01.1 P50U7440-62-2 60 12/01/21Zincug/L 12/07/21 CLP SFAM01.1 P60U7440-66-6 2/2/22 10:15C215305 DMTL TMTL FINAL 02 02 22 1015Page 17 of 20 D.A.R.T. Id: 22-0051 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0051, Holcomb Creosote - Reported by Denise Goddard Dissolved Metals Sample ID:Lab ID: MW-6_091421_Dis C215305-14 Matrix:Groundwater Date Collected:9/14/21 17:09 Project: 22-0051, Holcomb Creosote Contract Lab Case: 49820 D No: BLS1 CHX MD No: BLS1 CHX Station ID:MW-6 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/06/21Aluminumug/L 12/07/21 CLP SFAM01.1 P200U7429-90-5 60 12/06/21Antimonyug/L 12/07/21 CLP SFAM01.1 P60U7440-36-0 10 12/06/21Arsenicug/L 12/07/21 CLP SFAM01.1 P10U7440-38-2 200 12/06/21Bariumug/L 12/07/21 CLP SFAM01.1 P110J, Q-27440-39-3 5.0 12/06/21Berylliumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/06/21Cadmiumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-43-9 5000 12/06/21Calciumug/L 12/07/21 CLP SFAM01.1 P2300J, Q-27440-70-2 10 12/06/21Chromiumug/L 12/07/21 CLP SFAM01.1 P10U7440-47-3 50 12/06/21Cobaltug/L 12/07/21 CLP SFAM01.1 P50U7440-48-4 25 12/06/21Copperug/L 12/07/21 CLP SFAM01.1 P25U7440-50-8 100 12/06/21Ironug/L 12/07/21 CLP SFAM01.1 P51007439-89-6 10 12/06/21Leadug/L 12/07/21 CLP SFAM01.1 P10U7439-92-1 5000 12/06/21Magnesiumug/L 12/07/21 CLP SFAM01.1 P910J, Q-27439-95-4 15 12/06/21Manganeseug/L 12/08/21 CLP SFAM01.1 P19007439-96-5 40 12/06/21Nickelug/L 12/07/21 CLP SFAM01.1 P40U7440-02-0 5000 12/06/21Potassiumug/L 12/07/21 CLP SFAM01.1 P1600J, Q-27440-09-7 35 12/06/21Seleniumug/L 12/07/21 CLP SFAM01.1 P35U7782-49-2 10 12/06/21Silverug/L 12/07/21 CLP SFAM01.1 P10U7440-22-4 5000 12/06/21Sodiumug/L 12/07/21 CLP SFAM01.1 P82007440-23-5 25 12/06/21Thalliumug/L 12/07/21 CLP SFAM01.1 P25U7440-28-0 50 12/06/21Vanadiumug/L 12/07/21 CLP SFAM01.1 P50U7440-62-2 60 12/06/21Zincug/L 12/07/21 CLP SFAM01.1 P60U7440-66-6 2/2/22 10:15C215305 DMTL TMTL FINAL 02 02 22 1015Page 18 of 20 D.A.R.T. Id: 22-0051 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0051, Holcomb Creosote - Reported by Denise Goddard Total Metals Sample ID:Lab ID: MW-6_101321 C215305-15 Matrix:Groundwater Date Collected:10/13/21 15:18 Project: 22-0051, Holcomb Creosote Contract Lab Case: 49820 D No: BLR5 CHX MD No: BLR5 CHX Station ID:MW-6 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/01/21Aluminumug/L 12/07/21 CLP SFAM01.1 P200U7429-90-5 60 12/01/21Antimonyug/L 12/07/21 CLP SFAM01.1 P60U7440-36-0 10 12/01/21Arsenicug/L 12/07/21 CLP SFAM01.1 P10U7440-38-2 200 12/01/21Bariumug/L 12/07/21 CLP SFAM01.1 P200U7440-39-3 5.0 12/01/21Berylliumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/01/21Cadmiumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-43-9 5000 12/01/21Calciumug/L 12/07/21 CLP SFAM01.1 P2500J, Q-27440-70-2 10 12/01/21Chromiumug/L 12/07/21 CLP SFAM01.1 P61J, CLP267440-47-3 50 12/01/21Cobaltug/L 12/07/21 CLP SFAM01.1 P50U7440-48-4 25 12/01/21Copperug/L 12/07/21 CLP SFAM01.1 P25U7440-50-8 100 12/01/21Ironug/L 12/07/21 CLP SFAM01.1 P100U7439-89-6 10 12/01/21Leadug/L 12/07/21 CLP SFAM01.1 P10U7439-92-1 5000 12/01/21Magnesiumug/L 12/07/21 CLP SFAM01.1 P1300J, Q-27439-95-4 15 12/01/21Manganeseug/L 12/07/21 CLP SFAM01.1 P46007439-96-5 40 12/01/21Nickelug/L 12/07/21 CLP SFAM01.1 P40U7440-02-0 5000 12/01/21Potassiumug/L 12/07/21 CLP SFAM01.1 P3400J, Q-27440-09-7 35 12/01/21Seleniumug/L 12/07/21 CLP SFAM01.1 P35U7782-49-2 10 12/01/21Silverug/L 12/07/21 CLP SFAM01.1 P10U7440-22-4 5000 12/01/21Sodiumug/L 12/07/21 CLP SFAM01.1 P930007440-23-5 25 12/01/21Thalliumug/L 12/07/21 CLP SFAM01.1 P25U7440-28-0 50 12/01/21Vanadiumug/L 12/07/21 CLP SFAM01.1 P50U7440-62-2 60 12/01/21Zincug/L 12/07/21 CLP SFAM01.1 P60U7440-66-6 2/2/22 10:15C215305 DMTL TMTL FINAL 02 02 22 1015Page 19 of 20 D.A.R.T. Id: 22-0051 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0051, Holcomb Creosote - Reported by Denise Goddard Dissolved Metals Sample ID:Lab ID: MW-6_101321_Dis C215305-16 Matrix:Groundwater Date Collected:10/13/21 15:18 Project: 22-0051, Holcomb Creosote Contract Lab Case: 49820 D No: BLS6 CHX MD No: BLS6 CHX Station ID:MW-6 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/06/21Aluminumug/L 12/07/21 CLP SFAM01.1 P200U7429-90-5 60 12/06/21Antimonyug/L 12/07/21 CLP SFAM01.1 P60U7440-36-0 10 12/06/21Arsenicug/L 12/07/21 CLP SFAM01.1 P10U7440-38-2 200 12/06/21Bariumug/L 12/07/21 CLP SFAM01.1 P200U7440-39-3 5.0 12/06/21Berylliumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/06/21Cadmiumug/L 12/07/21 CLP SFAM01.1 P5.0 U7440-43-9 5000 12/06/21Calciumug/L 12/07/21 CLP SFAM01.1 P2200J, Q-27440-70-2 10 12/06/21Chromiumug/L 12/07/21 CLP SFAM01.1 P62J, CLP267440-47-3 50 12/06/21Cobaltug/L 12/07/21 CLP SFAM01.1 P50U7440-48-4 25 12/06/21Copperug/L 12/07/21 CLP SFAM01.1 P25U7440-50-8 100 12/06/21Ironug/L 12/07/21 CLP SFAM01.1 P100U7439-89-6 10 12/06/21Leadug/L 12/07/21 CLP SFAM01.1 P10U7439-92-1 5000 12/06/21Magnesiumug/L 12/07/21 CLP SFAM01.1 P1200J, Q-27439-95-4 30 12/06/21Manganeseug/L 12/08/21 CLP SFAM01.1 P190007439-96-5 40 12/06/21Nickelug/L 12/07/21 CLP SFAM01.1 P40U7440-02-0 5000 12/06/21Potassiumug/L 12/07/21 CLP SFAM01.1 P3300J, Q-27440-09-7 35 12/06/21Seleniumug/L 12/07/21 CLP SFAM01.1 P13J, CLP36, Q-27782-49-2 10 12/06/21Silverug/L 12/07/21 CLP SFAM01.1 P4.9 J, Q-27440-22-4 5000 12/06/21Sodiumug/L 12/07/21 CLP SFAM01.1 P920007440-23-5 25 12/06/21Thalliumug/L 12/07/21 CLP SFAM01.1 P7.4 J, CLP36, Q-27440-28-0 50 12/06/21Vanadiumug/L 12/07/21 CLP SFAM01.1 P50U7440-62-2 60 12/06/21Zincug/L 12/07/21 CLP SFAM01.1 P22J, Q-27440-66-6 2/2/22 10:15C215305 DMTL TMTL FINAL 02 02 22 1015Page 20 of 20 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters September 28, 2021 MEMORANDUM SUBJECT: FROM: FINAL Analytical Report Project: 21-0367, Holcomb Creosote Stacie Masters LSB Organic Chemistry Section Chief Laboratory Services Branch John Deatrick, ChiefTHRU: TO:Joydeb Majumder Attached are the final results for the analytical groups listed below. This report shall not be reproduced except in full without approval of the Region 4 laboratory. These analyses were performed in accordance with the Laboratory Services Branch's Laboratory Operations and Quality Assurance Manual (LSB LOQAM) found at www.epa.gov/region4/sesd/asbsop. Any unique project data quality objectives specified in writing by the data requestor have also been incorporated into the data unless otherwise noted in the Report Narrative. Chemistry data have been verified based on the LSB LOQAM specifications and have been qualified by this laboratory if the applicable quality control criteria were not met. Verification is defined in Chapter 5 of the LSB LOQAM. For a listing of specific data qualifiers and explanations, please refer to the Data Qualifier Definitions included in this report. The reported results are accurate within the limits of the method(s) and are representative only of the samples as received by the laboratory. Analyses Included in this report:Method Used:Accreditations: Semi Volatile Organics (SVOA) Semivolatile organic compounds ISOEPA 8270D (Water) 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 1 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Sample Disposal Policy Due to limited space for long term sample storage, LSB’s policy is to dispose of samples on a periodic schedule. Air samples collected in summa canisters will be disposed of 30 days following the issuance of this report. All other sample media including original samples, sample extracts and or digestates will be disposed of, in accordance with applicable regulations, 60 days from the date of this report. This sample disposal policy does not apply to criminal samples which are held until the laboratory is notified by the criminal investigators that case development and litigation are complete. These samples may be held in the laboratory's custody for a longer period of time. If samples require storage beyond the 60-day period, please contact the Sample Control Coordinator by e-mail at R4SampleCustody@epa.gov. cc: Nardina Turner 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 2 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Date ReceivedDate CollectedMatrixLaboratory IDSample ID SAMPLES INCLUDED IN THIS REPORT Project: 21-0367, Holcomb Creosote MW-2 E213804-01 Groundwater 9/14/21 13:13 9/15/21 13:05 MW-57 E213804-02 Groundwater 9/14/21 14:20 9/15/21 13:05 MW-58 E213804-03 Groundwater 9/14/21 15:38 9/15/21 13:05 MW-6 E213804-04 Groundwater 9/14/21 17:09 9/15/21 13:05 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 3 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters DATA QUALIFIER DEFINITIONS U The analyte was not detected at or above the reporting limit. J The identification of the analyte is acceptable; the reported value is an estimate. NJ Presumptive evidence that analyte is present; reported as a tentative identification with an estimated value. Q-2 Result greater than MDL but less than MRL. QL-1 Laboratory Control Spike Recovery less than method control limits QL-2 Laboratory Control Spike Recovery greater than method control limits QR-1 MRL verification recovery less than lower control limits. 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 4 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters ACRONYMS AND ABBREVIATIONS CAS Chemical Abstracts Service Note: Analytes with no known CAS identifiers have been assigned codes beginning with "E", the EPA ID as assigned by the EPA Substance Registry System (www.epa.gov/srs), or beginning with "R4-", a unique identifier assigned by the EPA Region 4 laboratory. MDL Method Detection Limit - The minimum concentration of a substance (an analyte) that can be measured and reported with a 99% confidence that the analyte concentration is greater than zero. MRL Minimum Reporting Limit - Analyte concentration that corresponds to the lowest demonstrated level of acceptable quantitation. The MRL is sample-specific and accounts for preparation weights and volumes, dilutions, and moisture content of soil/sediments. TIC Tentatively Identified Compound - An analyte identified based on a match with the instrument software's mass spectral library. A calibration standard has not been analyzed to confirm the compound's identification or the estimated concentration reported. ACCREDITATIONS: ISO Accredited to ISO/IEC 17025:2017 and accreditation requirements for Forensic Science Testing Laboratories. Refer to the certificate and scope of accreditation FT-0330 at: http://www.epa.gov/aboutepa/about-region-4s-science-and-ecosystem-support-division-sesd NR Not accredited for this test. DW Accredited for conformance with ISO/IEC 17025:2017 and testing elements in the Fifth Edition of the Manual for the Certification of Laboratories Analyzing Drinking Water, EPA 815-R-05-004, 2005. Refer to the certificate and scope of accreditation AT-2628 at: http://www.epa.gov/aboutepa/about-region-4s-science-and-ecosystem-support-division-sesd ISO/DW Accredited to ISO/IEC 17025:2017 and accreditation requirements for Forensic Science Testing Labs, and conformance with ISO/IEC 17025:2017 and testing elements in the Manual for the Certification of Laboratories Analyzing Drinking Water. 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 5 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-2 E213804-01 Matrix:Groundwater Date Collected:9/14/21 13:13 Project: 21-0367, Holcomb Creosote Station ID:MW-2 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 10(3-and/or 4-)Methylphenol ug/L EPA 8270D10U1319-77-3 9/21/2117:429/16/21 8:15 2.01,1-Biphenyl ug/L EPA 8270D8492-52-4 9/21/2117:429/16/21 8:15 2.01,4-Dioxane ug/L EPA 8270D2.0 U123-91-1 9/21/2117:429/16/21 8:15 201-Methylnaphthalene ug/L EPA 8270D420J, QL-290-12-0 9/21/2112:349/16/21 8:15 102,3,4,6-Tetrachlorophenol ug/L EPA 8270D10U58-90-2 9/21/2117:429/16/21 8:15 102,4,5-Trichlorophenol ug/L EPA 8270D10U95-95-4 9/21/2117:429/16/21 8:15 102,4,6-Trichlorophenol ug/L EPA 8270D10U88-06-2 9/21/2117:429/16/21 8:15 102,4-Dichlorophenol ug/L EPA 8270D10U120-83-2 9/21/2117:429/16/21 8:15 102,4-Dimethylphenol ug/L EPA 8270D10U105-67-9 9/21/2117:429/16/21 8:15 202,4-Dinitrophenol ug/L EPA 8270D20U51-28-5 9/21/2117:429/16/21 8:15 102,4-Dinitrotoluene ug/L EPA 8270D10U121-14-2 9/21/2117:429/16/21 8:15 102,6-Dinitrotoluene ug/L EPA 8270D10U606-20-2 9/21/2117:429/16/21 8:15 102-Chloronaphthalene ug/L EPA 8270D10U91-58-7 9/21/2117:429/16/21 8:15 102-Chlorophenol ug/L EPA 8270D10U95-57-8 9/21/2117:429/16/21 8:15 102-Methyl-4,6-dinitrophenol ug/L EPA 8270D10U534-52-1 9/21/2117:429/16/21 8:15 202-Methylnaphthalene ug/L EPA 8270D76091-57-6 9/21/2112:349/16/21 8:15 102-Methylphenol ug/L EPA 8270D10U95-48-7 9/21/2117:429/16/21 8:15 102-Nitroaniline ug/L EPA 8270D10U88-74-4 9/21/2117:429/16/21 8:15 102-Nitrophenol ug/L EPA 8270D10U88-75-5 9/21/2117:429/16/21 8:15 103,3'-Dichlorobenzidine ug/L EPA 8270D10U91-94-1 9/21/2117:429/16/21 8:15 103-Nitroaniline ug/L EPA 8270D10U99-09-2 9/21/2117:429/16/21 8:15 104-Bromophenyl phenyl ether ug/L EPA 8270D10U101-55-3 9/21/2117:429/16/21 8:15 104-Chloro-3-methylphenol ug/L EPA 8270D10U59-50-7 9/21/2117:429/16/21 8:15 104-Chloroaniline ug/L EPA 8270D10U106-47-8 9/21/2117:429/16/21 8:15 104-Chlorophenyl phenyl ether ug/L EPA 8270D10U7005-72-3 9/21/2117:429/16/21 8:15 104-Nitroaniline ug/L EPA 8270D10U100-01-6 9/21/2117:429/16/21 8:15 104-Nitrophenol ug/L EPA 8270D10U100-02-7 9/21/2117:429/16/21 8:15 20Acenaphtheneug/L EPA 8270D47083-32-9 9/21/2112:349/16/21 8:15 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 6 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-2 E213804-01 Matrix:Groundwater Date Collected:9/14/21 13:13 Project: 21-0367, Holcomb Creosote Station ID:MW-2 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 2.0Acenaphthyleneug/L EPA 8270D2.0 U208-96-8 9/21/2117:429/16/21 8:15 10Acetophenoneug/L EPA 8270D10U98-86-2 9/21/2117:429/16/21 8:15 2.0Anthraceneug/L EPA 8270D3.3120-12-7 9/21/2117:429/16/21 8:15 10Atrazineug/L EPA 8270D10U, J, QL-1, QR-1 1912-24-9 9/21/2117:429/16/21 8:15 10Benzaldehydeug/L EPA 8270D10U100-52-7 9/21/2117:429/16/21 8:15 2.0Benzo(a)anthracene ug/L EPA 8270D2.0 U56-55-3 9/21/2117:429/16/21 8:15 2.0Benzo(a)pyrene ug/L EPA 8270D2.0 U50-32-8 9/21/2117:429/16/21 8:15 2.0Benzo(b)fluoranthene ug/L EPA 8270D2.0 U205-99-2 9/21/2117:429/16/21 8:15 2.0Benzo(g,h,i)perylene ug/L EPA 8270D2.0 U191-24-2 9/21/2117:429/16/21 8:15 2.0Benzo(k)fluoranthene ug/L EPA 8270D2.0 U207-08-9 9/21/2117:429/16/21 8:15 10Benzyl alcohol ug/L EPA 8270D10U100-51-6 9/21/2117:429/16/21 8:15 10Benzyl butyl phthalate ug/L EPA 8270D10U85-68-7 9/21/2117:429/16/21 8:15 10Bis(2-chloro-1-methylethyl) ether ug/L EPA 8270D10U108-60-1 9/21/2117:429/16/21 8:15 10Bis(2-chloroethoxy)methane ug/L EPA 8270D10U111-91-1 9/21/2117:429/16/21 8:15 10bis(2-Chloroethyl) Ether ug/L EPA 8270D10U111-44-4 9/21/2117:429/16/21 8:15 10Bis(2-ethylhexyl) phthalate ug/L EPA 8270D10U117-81-7 9/21/2117:429/16/21 8:15 10Caprolactamug/L EPA 8270D10U105-60-2 9/21/2117:429/16/21 8:15 20Carbazoleug/L EPA 8270D17086-74-8 9/21/2112:349/16/21 8:15 2.0Chryseneug/L EPA 8270D2.0 U218-01-9 9/21/2117:429/16/21 8:15 2.0Dibenz(a,h)anthracene ug/L EPA 8270D2.0 U53-70-3 9/21/2117:429/16/21 8:15 20Dibenzofuranug/L EPA 8270D240132-64-9 9/21/2112:349/16/21 8:15 10Diethyl phthalate ug/L EPA 8270D10U84-66-2 9/21/2117:429/16/21 8:15 10Dimethyl phthalate ug/L EPA 8270D10U131-11-3 9/21/2117:429/16/21 8:15 10Di-n-butylphthalate ug/L EPA 8270D10U84-74-2 9/21/2117:429/16/21 8:15 10Di-n-octylphthalate ug/L EPA 8270D10U117-84-0 9/21/2117:429/16/21 8:15 2.0Fluorantheneug/L EPA 8270D8.5206-44-0 9/21/2117:429/16/21 8:15 20Fluoreneug/L EPA 8270D16086-73-7 9/21/2112:349/16/21 8:15 10Hexachlorobenzene (HCB)ug/L EPA 8270D10U118-74-1 9/21/2117:429/16/21 8:15 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 7 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-2 E213804-01 Matrix:Groundwater Date Collected:9/14/21 13:13 Project: 21-0367, Holcomb Creosote Station ID:MW-2 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 10Hexachlorocyclopentadiene (HCCP)ug/L EPA 8270D10U77-47-4 9/21/2117:429/16/21 8:15 10Hexachloroethaneug/L EPA 8270D10U67-72-1 9/21/2117:429/16/21 8:15 2.0Indeno (1,2,3-cd) pyrene ug/L EPA 8270D2.0 U193-39-5 9/21/2117:429/16/21 8:15 10Isophoroneug/L EPA 8270D10U78-59-1 9/21/2117:429/16/21 8:15 200Naphthaleneug/L EPA 8270D500091-20-3 9/21/2114:549/16/21 8:15 10Nitrobenzeneug/L EPA 8270D10U98-95-3 9/21/2117:429/16/21 8:15 10n-Nitroso di-n-Propylamine ug/L EPA 8270D10U621-64-7 9/21/2117:429/16/21 8:15 10n-Nitrosodiphenylamine/Diphenylamine ug/L EPA 8270D10U122-39-4 9/21/2117:429/16/21 8:15 10Pentachlorophenolug/L EPA 8270D10U87-86-5 9/21/2117:429/16/21 8:15 20Phenanthreneug/L EPA 8270D18085-01-8 9/21/2112:349/16/21 8:15 10Phenolug/L EPA 8270D10U108-95-2 9/21/2117:429/16/21 8:15 2.0Pyreneug/L EPA 8270D4.3129-00-0 9/21/2117:429/16/21 8:15 Tentatively Identified Compounds: 10 EPA 8270Dug/L10Tentatively Identified Compounds UR4-0000 9/21/2117:429/16/21 8:15 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 8 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-57 E213804-02 Matrix:Groundwater Date Collected:9/14/21 14:20 Project: 21-0367, Holcomb Creosote Station ID:MW-57 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 10(3-and/or 4-)Methylphenol ug/L EPA 8270D10U1319-77-3 9/21/2118:389/16/21 8:15 201,1-Biphenyl ug/L EPA 8270D13092-52-4 9/21/2113:029/16/21 8:15 2.01,4-Dioxane ug/L EPA 8270D2.0 U123-91-1 9/21/2118:389/16/21 8:15 2001-Methylnaphthalene ug/L EPA 8270D420J, QL-290-12-0 9/21/2115:229/16/21 8:15 102,3,4,6-Tetrachlorophenol ug/L EPA 8270D10U58-90-2 9/21/2118:389/16/21 8:15 102,4,5-Trichlorophenol ug/L EPA 8270D10U95-95-4 9/21/2118:389/16/21 8:15 102,4,6-Trichlorophenol ug/L EPA 8270D10U88-06-2 9/21/2118:389/16/21 8:15 102,4-Dichlorophenol ug/L EPA 8270D10U120-83-2 9/21/2118:389/16/21 8:15 102,4-Dimethylphenol ug/L EPA 8270D10U105-67-9 9/21/2118:389/16/21 8:15 202,4-Dinitrophenol ug/L EPA 8270D20U51-28-5 9/21/2118:389/16/21 8:15 102,4-Dinitrotoluene ug/L EPA 8270D10U121-14-2 9/21/2118:389/16/21 8:15 102,6-Dinitrotoluene ug/L EPA 8270D10U606-20-2 9/21/2118:389/16/21 8:15 102-Chloronaphthalene ug/L EPA 8270D10U91-58-7 9/21/2118:389/16/21 8:15 102-Chlorophenol ug/L EPA 8270D10U95-57-8 9/21/2118:389/16/21 8:15 102-Methyl-4,6-dinitrophenol ug/L EPA 8270D10U534-52-1 9/21/2118:389/16/21 8:15 2002-Methylnaphthalene ug/L EPA 8270D83091-57-6 9/21/2115:229/16/21 8:15 102-Methylphenol ug/L EPA 8270D10U95-48-7 9/21/2118:389/16/21 8:15 102-Nitroaniline ug/L EPA 8270D10U88-74-4 9/21/2118:389/16/21 8:15 102-Nitrophenol ug/L EPA 8270D10U88-75-5 9/21/2118:389/16/21 8:15 103,3'-Dichlorobenzidine ug/L EPA 8270D10U91-94-1 9/21/2118:389/16/21 8:15 103-Nitroaniline ug/L EPA 8270D10U99-09-2 9/21/2118:389/16/21 8:15 104-Bromophenyl phenyl ether ug/L EPA 8270D10U101-55-3 9/21/2118:389/16/21 8:15 104-Chloro-3-methylphenol ug/L EPA 8270D10U59-50-7 9/21/2118:389/16/21 8:15 104-Chloroaniline ug/L EPA 8270D10U106-47-8 9/21/2118:389/16/21 8:15 104-Chlorophenyl phenyl ether ug/L EPA 8270D10U7005-72-3 9/21/2118:389/16/21 8:15 104-Nitroaniline ug/L EPA 8270D10U100-01-6 9/21/2118:389/16/21 8:15 104-Nitrophenol ug/L EPA 8270D10U100-02-7 9/21/2118:389/16/21 8:15 20Acenaphtheneug/L EPA 8270D51083-32-9 9/21/2113:029/16/21 8:15 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 9 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-57 E213804-02 Matrix:Groundwater Date Collected:9/14/21 14:20 Project: 21-0367, Holcomb Creosote Station ID:MW-57 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 2.0Acenaphthyleneug/L EPA 8270D3.4208-96-8 9/21/2118:389/16/21 8:15 10Acetophenoneug/L EPA 8270D10U98-86-2 9/21/2118:389/16/21 8:15 2.0Anthraceneug/L EPA 8270D2.0 U120-12-7 9/21/2118:389/16/21 8:15 10Atrazineug/L EPA 8270D10U, J, QL-1, QR-1 1912-24-9 9/21/2118:389/16/21 8:15 10Benzaldehydeug/L EPA 8270D10U100-52-7 9/21/2118:389/16/21 8:15 2.0Benzo(a)anthracene ug/L EPA 8270D2.0 U56-55-3 9/21/2118:389/16/21 8:15 2.0Benzo(a)pyrene ug/L EPA 8270D2.0 U50-32-8 9/21/2118:389/16/21 8:15 2.0Benzo(b)fluoranthene ug/L EPA 8270D2.0 U205-99-2 9/21/2118:389/16/21 8:15 2.0Benzo(g,h,i)perylene ug/L EPA 8270D2.0 U191-24-2 9/21/2118:389/16/21 8:15 2.0Benzo(k)fluoranthene ug/L EPA 8270D2.0 U207-08-9 9/21/2118:389/16/21 8:15 10Benzyl alcohol ug/L EPA 8270D10U100-51-6 9/21/2118:389/16/21 8:15 10Benzyl butyl phthalate ug/L EPA 8270D10U85-68-7 9/21/2118:389/16/21 8:15 10Bis(2-chloro-1-methylethyl) ether ug/L EPA 8270D10U108-60-1 9/21/2118:389/16/21 8:15 10Bis(2-chloroethoxy)methane ug/L EPA 8270D10U111-91-1 9/21/2118:389/16/21 8:15 10bis(2-Chloroethyl) Ether ug/L EPA 8270D10U111-44-4 9/21/2118:389/16/21 8:15 10Bis(2-ethylhexyl) phthalate ug/L EPA 8270D10U117-81-7 9/21/2118:389/16/21 8:15 10Caprolactamug/L EPA 8270D10U105-60-2 9/21/2118:389/16/21 8:15 20Carbazoleug/L EPA 8270D24086-74-8 9/21/2113:029/16/21 8:15 2.0Chryseneug/L EPA 8270D2.0 U218-01-9 9/21/2118:389/16/21 8:15 2.0Dibenz(a,h)anthracene ug/L EPA 8270D2.0 U53-70-3 9/21/2118:389/16/21 8:15 20Dibenzofuranug/L EPA 8270D320132-64-9 9/21/2113:029/16/21 8:15 10Diethyl phthalate ug/L EPA 8270D10U84-66-2 9/21/2118:389/16/21 8:15 10Dimethyl phthalate ug/L EPA 8270D10U131-11-3 9/21/2118:389/16/21 8:15 10Di-n-butylphthalate ug/L EPA 8270D10U84-74-2 9/21/2118:389/16/21 8:15 10Di-n-octylphthalate ug/L EPA 8270D10U117-84-0 9/21/2118:389/16/21 8:15 2.0Fluorantheneug/L EPA 8270D1.8 J, Q-2206-44-0 9/21/2118:389/16/21 8:15 20Fluoreneug/L EPA 8270D12086-73-7 9/21/2113:029/16/21 8:15 10Hexachlorobenzene (HCB)ug/L EPA 8270D10U118-74-1 9/21/2118:389/16/21 8:15 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 10 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-57 E213804-02 Matrix:Groundwater Date Collected:9/14/21 14:20 Project: 21-0367, Holcomb Creosote Station ID:MW-57 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 10Hexachlorocyclopentadiene (HCCP)ug/L EPA 8270D10U77-47-4 9/21/2118:389/16/21 8:15 10Hexachloroethaneug/L EPA 8270D10U67-72-1 9/21/2118:389/16/21 8:15 2.0Indeno (1,2,3-cd) pyrene ug/L EPA 8270D2.0 U193-39-5 9/21/2118:389/16/21 8:15 10Isophoroneug/L EPA 8270D10U78-59-1 9/21/2118:389/16/21 8:15 200Naphthaleneug/L EPA 8270D880091-20-3 9/21/2115:229/16/21 8:15 10Nitrobenzeneug/L EPA 8270D10U98-95-3 9/21/2118:389/16/21 8:15 10n-Nitroso di-n-Propylamine ug/L EPA 8270D10U621-64-7 9/21/2118:389/16/21 8:15 10n-Nitrosodiphenylamine/Diphenylamine ug/L EPA 8270D10U122-39-4 9/21/2118:389/16/21 8:15 10Pentachlorophenolug/L EPA 8270D10U87-86-5 9/21/2118:389/16/21 8:15 20Phenanthreneug/L EPA 8270D12085-01-8 9/21/2113:029/16/21 8:15 10Phenolug/L EPA 8270D10U108-95-2 9/21/2118:389/16/21 8:15 2.0Pyreneug/L EPA 8270D0.76 J, Q-2129-00-0 9/21/2118:389/16/21 8:15 Tentatively Identified Compounds: 10 EPA 8270Dug/L10Tentatively Identified Compounds UR4-0000 9/21/2118:389/16/21 8:15 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 11 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-58 E213804-03 Matrix:Groundwater Date Collected:9/14/21 15:38 Project: 21-0367, Holcomb Creosote Station ID:MW-58 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 10(3-and/or 4-)Methylphenol ug/L EPA 8270D10U1319-77-3 9/21/2119:069/16/21 8:15 2.01,1-Biphenyl ug/L EPA 8270D8092-52-4 9/21/2119:069/16/21 8:15 2.01,4-Dioxane ug/L EPA 8270D2.0 U123-91-1 9/21/2119:069/16/21 8:15 2001-Methylnaphthalene ug/L EPA 8270D260J, QL-290-12-0 9/21/2115:509/16/21 8:15 102,3,4,6-Tetrachlorophenol ug/L EPA 8270D10U58-90-2 9/21/2119:069/16/21 8:15 102,4,5-Trichlorophenol ug/L EPA 8270D10U95-95-4 9/21/2119:069/16/21 8:15 102,4,6-Trichlorophenol ug/L EPA 8270D10U88-06-2 9/21/2119:069/16/21 8:15 102,4-Dichlorophenol ug/L EPA 8270D10U120-83-2 9/21/2119:069/16/21 8:15 102,4-Dimethylphenol ug/L EPA 8270D10U105-67-9 9/21/2119:069/16/21 8:15 202,4-Dinitrophenol ug/L EPA 8270D20U51-28-5 9/21/2119:069/16/21 8:15 102,4-Dinitrotoluene ug/L EPA 8270D10U121-14-2 9/21/2119:069/16/21 8:15 102,6-Dinitrotoluene ug/L EPA 8270D10U606-20-2 9/21/2119:069/16/21 8:15 102-Chloronaphthalene ug/L EPA 8270D10U91-58-7 9/21/2119:069/16/21 8:15 102-Chlorophenol ug/L EPA 8270D10U95-57-8 9/21/2119:069/16/21 8:15 102-Methyl-4,6-dinitrophenol ug/L EPA 8270D10U534-52-1 9/21/2119:069/16/21 8:15 2002-Methylnaphthalene ug/L EPA 8270D48091-57-6 9/21/2115:509/16/21 8:15 102-Methylphenol ug/L EPA 8270D10U95-48-7 9/21/2119:069/16/21 8:15 102-Nitroaniline ug/L EPA 8270D10U88-74-4 9/21/2119:069/16/21 8:15 102-Nitrophenol ug/L EPA 8270D10U88-75-5 9/21/2119:069/16/21 8:15 103,3'-Dichlorobenzidine ug/L EPA 8270D10U91-94-1 9/21/2119:069/16/21 8:15 103-Nitroaniline ug/L EPA 8270D10U99-09-2 9/21/2119:069/16/21 8:15 104-Bromophenyl phenyl ether ug/L EPA 8270D10U101-55-3 9/21/2119:069/16/21 8:15 104-Chloro-3-methylphenol ug/L EPA 8270D10U59-50-7 9/21/2119:069/16/21 8:15 104-Chloroaniline ug/L EPA 8270D10U106-47-8 9/21/2119:069/16/21 8:15 104-Chlorophenyl phenyl ether ug/L EPA 8270D10U7005-72-3 9/21/2119:069/16/21 8:15 104-Nitroaniline ug/L EPA 8270D10U100-01-6 9/21/2119:069/16/21 8:15 104-Nitrophenol ug/L EPA 8270D10U100-02-7 9/21/2119:069/16/21 8:15 20Acenaphtheneug/L EPA 8270D41083-32-9 9/21/2113:309/16/21 8:15 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 12 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-58 E213804-03 Matrix:Groundwater Date Collected:9/14/21 15:38 Project: 21-0367, Holcomb Creosote Station ID:MW-58 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 2.0Acenaphthyleneug/L EPA 8270D4.0208-96-8 9/21/2119:069/16/21 8:15 10Acetophenoneug/L EPA 8270D10U98-86-2 9/21/2119:069/16/21 8:15 2.0Anthraceneug/L EPA 8270D1.4 J, Q-2120-12-7 9/21/2119:069/16/21 8:15 10Atrazineug/L EPA 8270D10U, J, QL-1, QR-1 1912-24-9 9/21/2119:069/16/21 8:15 10Benzaldehydeug/L EPA 8270D10U100-52-7 9/21/2119:069/16/21 8:15 2.0Benzo(a)anthracene ug/L EPA 8270D2.0 U56-55-3 9/21/2119:069/16/21 8:15 2.0Benzo(a)pyrene ug/L EPA 8270D2.0 U50-32-8 9/21/2119:069/16/21 8:15 2.0Benzo(b)fluoranthene ug/L EPA 8270D2.0 U205-99-2 9/21/2119:069/16/21 8:15 2.0Benzo(g,h,i)perylene ug/L EPA 8270D2.0 U191-24-2 9/21/2119:069/16/21 8:15 2.0Benzo(k)fluoranthene ug/L EPA 8270D2.0 U207-08-9 9/21/2119:069/16/21 8:15 10Benzyl alcohol ug/L EPA 8270D10U100-51-6 9/21/2119:069/16/21 8:15 10Benzyl butyl phthalate ug/L EPA 8270D10U85-68-7 9/21/2119:069/16/21 8:15 10Bis(2-chloro-1-methylethyl) ether ug/L EPA 8270D10U108-60-1 9/21/2119:069/16/21 8:15 10Bis(2-chloroethoxy)methane ug/L EPA 8270D10U111-91-1 9/21/2119:069/16/21 8:15 10bis(2-Chloroethyl) Ether ug/L EPA 8270D10U111-44-4 9/21/2119:069/16/21 8:15 10Bis(2-ethylhexyl) phthalate ug/L EPA 8270D10U117-81-7 9/21/2119:069/16/21 8:15 10Caprolactamug/L EPA 8270D10U105-60-2 9/21/2119:069/16/21 8:15 20Carbazoleug/L EPA 8270D13086-74-8 9/21/2113:309/16/21 8:15 2.0Chryseneug/L EPA 8270D2.0 U218-01-9 9/21/2119:069/16/21 8:15 2.0Dibenz(a,h)anthracene ug/L EPA 8270D2.0 U53-70-3 9/21/2119:069/16/21 8:15 20Dibenzofuranug/L EPA 8270D230132-64-9 9/21/2113:309/16/21 8:15 10Diethyl phthalate ug/L EPA 8270D10U84-66-2 9/21/2119:069/16/21 8:15 10Dimethyl phthalate ug/L EPA 8270D10U131-11-3 9/21/2119:069/16/21 8:15 10Di-n-butylphthalate ug/L EPA 8270D10U84-74-2 9/21/2119:069/16/21 8:15 10Di-n-octylphthalate ug/L EPA 8270D10U117-84-0 9/21/2119:069/16/21 8:15 2.0Fluorantheneug/L EPA 8270D2.6206-44-0 9/21/2119:069/16/21 8:15 2.0Fluoreneug/L EPA 8270D9886-73-7 9/21/2119:069/16/21 8:15 10Hexachlorobenzene (HCB)ug/L EPA 8270D10U118-74-1 9/21/2119:069/16/21 8:15 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 13 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-58 E213804-03 Matrix:Groundwater Date Collected:9/14/21 15:38 Project: 21-0367, Holcomb Creosote Station ID:MW-58 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 10Hexachlorocyclopentadiene (HCCP)ug/L EPA 8270D10U77-47-4 9/21/2119:069/16/21 8:15 10Hexachloroethaneug/L EPA 8270D10U67-72-1 9/21/2119:069/16/21 8:15 2.0Indeno (1,2,3-cd) pyrene ug/L EPA 8270D2.0 U193-39-5 9/21/2119:069/16/21 8:15 10Isophoroneug/L EPA 8270D10U78-59-1 9/21/2119:069/16/21 8:15 200Naphthaleneug/L EPA 8270D520091-20-3 9/21/2115:509/16/21 8:15 10Nitrobenzeneug/L EPA 8270D10U98-95-3 9/21/2119:069/16/21 8:15 10n-Nitroso di-n-Propylamine ug/L EPA 8270D10U621-64-7 9/21/2119:069/16/21 8:15 10n-Nitrosodiphenylamine/Diphenylamine ug/L EPA 8270D10U122-39-4 9/21/2119:069/16/21 8:15 10Pentachlorophenolug/L EPA 8270D10U87-86-5 9/21/2119:069/16/21 8:15 2.0Phenanthreneug/L EPA 8270D7785-01-8 9/21/2119:069/16/21 8:15 10Phenolug/L EPA 8270D10U108-95-2 9/21/2119:069/16/21 8:15 2.0Pyreneug/L EPA 8270D1.4 J, Q-2129-00-0 9/21/2119:069/16/21 8:15 Tentatively Identified Compounds: EPA 8270Dug/L100Acenaphthylenone (TIC)NJR4-8001314 9/21/2119:069/16/21 8:15 EPA 8270Dug/L10Fluorenone (TIC)NJR4-6621 9/21/2119:069/16/21 8:15 EPA 8270Dug/L10Methyldibenzothiophene (TIC)NJR4-8000159 9/21/2119:069/16/21 8:15 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 14 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-6 E213804-04 Matrix:Groundwater Date Collected:9/14/21 17:09 Project: 21-0367, Holcomb Creosote Station ID:MW-6 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 10(3-and/or 4-)Methylphenol ug/L EPA 8270D10U1319-77-3 9/21/2119:339/16/21 8:15 201,1-Biphenyl ug/L EPA 8270D15092-52-4 9/21/2113:589/16/21 8:15 2.01,4-Dioxane ug/L EPA 8270D2.0 U123-91-1 9/21/2119:339/16/21 8:15 2001-Methylnaphthalene ug/L EPA 8270D540J, QL-290-12-0 9/21/2116:189/16/21 8:15 102,3,4,6-Tetrachlorophenol ug/L EPA 8270D10U58-90-2 9/21/2119:339/16/21 8:15 102,4,5-Trichlorophenol ug/L EPA 8270D10U95-95-4 9/21/2119:339/16/21 8:15 102,4,6-Trichlorophenol ug/L EPA 8270D10U88-06-2 9/21/2119:339/16/21 8:15 102,4-Dichlorophenol ug/L EPA 8270D10U120-83-2 9/21/2119:339/16/21 8:15 102,4-Dimethylphenol ug/L EPA 8270D10U105-67-9 9/21/2119:339/16/21 8:15 202,4-Dinitrophenol ug/L EPA 8270D20U51-28-5 9/21/2119:339/16/21 8:15 102,4-Dinitrotoluene ug/L EPA 8270D10U121-14-2 9/21/2119:339/16/21 8:15 102,6-Dinitrotoluene ug/L EPA 8270D10U606-20-2 9/21/2119:339/16/21 8:15 102-Chloronaphthalene ug/L EPA 8270D10U91-58-7 9/21/2119:339/16/21 8:15 102-Chlorophenol ug/L EPA 8270D10U95-57-8 9/21/2119:339/16/21 8:15 102-Methyl-4,6-dinitrophenol ug/L EPA 8270D10U534-52-1 9/21/2119:339/16/21 8:15 2002-Methylnaphthalene ug/L EPA 8270D110091-57-6 9/21/2116:189/16/21 8:15 102-Methylphenol ug/L EPA 8270D10U95-48-7 9/21/2119:339/16/21 8:15 102-Nitroaniline ug/L EPA 8270D10U88-74-4 9/21/2119:339/16/21 8:15 102-Nitrophenol ug/L EPA 8270D10U88-75-5 9/21/2119:339/16/21 8:15 103,3'-Dichlorobenzidine ug/L EPA 8270D10U91-94-1 9/21/2119:339/16/21 8:15 103-Nitroaniline ug/L EPA 8270D10U99-09-2 9/21/2119:339/16/21 8:15 104-Bromophenyl phenyl ether ug/L EPA 8270D10U101-55-3 9/21/2119:339/16/21 8:15 104-Chloro-3-methylphenol ug/L EPA 8270D10U59-50-7 9/21/2119:339/16/21 8:15 104-Chloroaniline ug/L EPA 8270D10U106-47-8 9/21/2119:339/16/21 8:15 104-Chlorophenyl phenyl ether ug/L EPA 8270D10U7005-72-3 9/21/2119:339/16/21 8:15 104-Nitroaniline ug/L EPA 8270D10U100-01-6 9/21/2119:339/16/21 8:15 104-Nitrophenol ug/L EPA 8270D10U100-02-7 9/21/2119:339/16/21 8:15 20Acenaphtheneug/L EPA 8270D71083-32-9 9/21/2113:589/16/21 8:15 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 15 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-6 E213804-04 Matrix:Groundwater Date Collected:9/14/21 17:09 Project: 21-0367, Holcomb Creosote Station ID:MW-6 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 2.0Acenaphthyleneug/L EPA 8270D4.1208-96-8 9/21/2119:339/16/21 8:15 10Acetophenoneug/L EPA 8270D10U98-86-2 9/21/2119:339/16/21 8:15 2.0Anthraceneug/L EPA 8270D5.0120-12-7 9/21/2119:339/16/21 8:15 10Atrazineug/L EPA 8270D10U, J, QL-1, QR-1 1912-24-9 9/21/2119:339/16/21 8:15 10Benzaldehydeug/L EPA 8270D10U100-52-7 9/21/2119:339/16/21 8:15 2.0Benzo(a)anthracene ug/L EPA 8270D2.0 U56-55-3 9/21/2119:339/16/21 8:15 2.0Benzo(a)pyrene ug/L EPA 8270D2.0 U50-32-8 9/21/2119:339/16/21 8:15 2.0Benzo(b)fluoranthene ug/L EPA 8270D2.0 U205-99-2 9/21/2119:339/16/21 8:15 2.0Benzo(g,h,i)perylene ug/L EPA 8270D2.0 U191-24-2 9/21/2119:339/16/21 8:15 2.0Benzo(k)fluoranthene ug/L EPA 8270D2.0 U207-08-9 9/21/2119:339/16/21 8:15 10Benzyl alcohol ug/L EPA 8270D10U100-51-6 9/21/2119:339/16/21 8:15 10Benzyl butyl phthalate ug/L EPA 8270D10U85-68-7 9/21/2119:339/16/21 8:15 10Bis(2-chloro-1-methylethyl) ether ug/L EPA 8270D10U108-60-1 9/21/2119:339/16/21 8:15 10Bis(2-chloroethoxy)methane ug/L EPA 8270D10U111-91-1 9/21/2119:339/16/21 8:15 10bis(2-Chloroethyl) Ether ug/L EPA 8270D10U111-44-4 9/21/2119:339/16/21 8:15 10Bis(2-ethylhexyl) phthalate ug/L EPA 8270D10U117-81-7 9/21/2119:339/16/21 8:15 10Caprolactamug/L EPA 8270D10U105-60-2 9/21/2119:339/16/21 8:15 20Carbazoleug/L EPA 8270D43086-74-8 9/21/2113:589/16/21 8:15 2.0Chryseneug/L EPA 8270D2.0 U218-01-9 9/21/2119:339/16/21 8:15 2.0Dibenz(a,h)anthracene ug/L EPA 8270D2.0 U53-70-3 9/21/2119:339/16/21 8:15 20Dibenzofuranug/L EPA 8270D370132-64-9 9/21/2113:589/16/21 8:15 10Diethyl phthalate ug/L EPA 8270D10U84-66-2 9/21/2119:339/16/21 8:15 10Dimethyl phthalate ug/L EPA 8270D10U131-11-3 9/21/2119:339/16/21 8:15 10Di-n-butylphthalate ug/L EPA 8270D10U84-74-2 9/21/2119:339/16/21 8:15 10Di-n-octylphthalate ug/L EPA 8270D10U117-84-0 9/21/2119:339/16/21 8:15 2.0Fluorantheneug/L EPA 8270D8.7206-44-0 9/21/2119:339/16/21 8:15 20Fluoreneug/L EPA 8270D24086-73-7 9/21/2113:589/16/21 8:15 10Hexachlorobenzene (HCB)ug/L EPA 8270D10U118-74-1 9/21/2119:339/16/21 8:15 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 16 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-6 E213804-04 Matrix:Groundwater Date Collected:9/14/21 17:09 Project: 21-0367, Holcomb Creosote Station ID:MW-6 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 10Hexachlorocyclopentadiene (HCCP)ug/L EPA 8270D10U77-47-4 9/21/2119:339/16/21 8:15 10Hexachloroethaneug/L EPA 8270D10U67-72-1 9/21/2119:339/16/21 8:15 2.0Indeno (1,2,3-cd) pyrene ug/L EPA 8270D2.0 U193-39-5 9/21/2119:339/16/21 8:15 10Isophoroneug/L EPA 8270D10U78-59-1 9/21/2119:339/16/21 8:15 2000Naphthaleneug/L EPA 8270D1300091-20-3 9/21/2116:469/16/21 8:15 10Nitrobenzeneug/L EPA 8270D10U98-95-3 9/21/2119:339/16/21 8:15 10n-Nitroso di-n-Propylamine ug/L EPA 8270D10U621-64-7 9/21/2119:339/16/21 8:15 10n-Nitrosodiphenylamine/Diphenylamine ug/L EPA 8270D10U122-39-4 9/21/2119:339/16/21 8:15 10Pentachlorophenolug/L EPA 8270D10U87-86-5 9/21/2119:339/16/21 8:15 20Phenanthreneug/L EPA 8270D19085-01-8 9/21/2113:589/16/21 8:15 10Phenolug/L EPA 8270D10U108-95-2 9/21/2119:339/16/21 8:15 2.0Pyreneug/L EPA 8270D5.7129-00-0 9/21/2119:339/16/21 8:15 Tentatively Identified Compounds: EPA 8270Dug/L20Phenanthridinone (TIC)NJR4-8000020 9/21/2119:339/16/21 8:15 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 17 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2109036 - E 3520 LLE Blank (2109036-BLK1)Prepared: 09/16/21 Analyzed: 09/21/21 EPA 8270D (3-and/or 4-)Methylphenol ug/LU10 U 1,1-Biphenyl "U 2.0 U 1,4-Dioxane "U 2.0 U 1-Methylnaphthalene "U 2.0 U 2,3,4,6-Tetrachlorophenol "U 10 U 2,4,5-Trichlorophenol "U 10 U 2,4,6-Trichlorophenol "U 10 U 2,4-Dichlorophenol "U 10 U 2,4-Dimethylphenol "U 10 U 2,4-Dinitrophenol "U 20 U 2,4-Dinitrotoluene "U 10 U 2,6-Dinitrotoluene "U 10 U 2-Chloronaphthalene "U 10 U 2-Chlorophenol "U 10 U 2-Methyl-4,6-dinitrophenol "U 10 U 2-Methylnaphthalene "U 2.0 U 2-Methylphenol "U 10 U 2-Nitroaniline "U 10 U 2-Nitrophenol "U 10 U 3,3'-Dichlorobenzidine "U 10 U 3-Nitroaniline "U 10 U 4-Bromophenyl phenyl ether "U 10 U 4-Chloro-3-methylphenol "U 10 U 4-Chloroaniline "U 10 U 4-Chlorophenyl phenyl ether "U 10 U 4-Nitroaniline "U 10 U 4-Nitrophenol "U 10 U Acenaphthene "U 2.0 U Acenaphthylene "U 2.0 U Acetophenone "U 10 U Anthracene "U 2.0 U Atrazine "U 10 U Benzaldehyde "U 10 U Benzo(a)anthracene "U 2.0 U Benzo(a)pyrene "U 2.0 U Benzo(b)fluoranthene "U 2.0 U Benzo(g,h,i)perylene "U 2.0 U Benzo(k)fluoranthene "U 2.0 U Benzyl alcohol "U 10 U 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 18 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2109036 - E 3520 LLE Blank (2109036-BLK1)Prepared: 09/16/21 Analyzed: 09/21/21 Benzyl butyl phthalate ug/LU10 U Bis(2-chloro-1-methylethyl) ether "U 10 U Bis(2-chloroethoxy)methane "U 10 U bis(2-Chloroethyl) Ether "U 10 U Bis(2-ethylhexyl) phthalate "U 10 U Caprolactam "U 10 U Carbazole "U 2.0 U Chrysene "U 2.0 U Dibenz(a,h)anthracene "U 2.0 U Dibenzofuran "U 2.0 U Diethyl phthalate "U 10 U Dimethyl phthalate "U 10 U Di-n-butylphthalate "U 10 U Di-n-octylphthalate "U 10 U Fluoranthene "U 2.0 U Fluorene "U 2.0 U Hexachlorobenzene (HCB)"U 10 U Hexachlorocyclopentadiene (HCCP)"U 10 U Hexachloroethane "U 10 U Indeno (1,2,3-cd) pyrene "U 2.0 U Isophorone "U 10 U Naphthalene "U 2.0 U Nitrobenzene "U 10 U n-Nitroso di-n-Propylamine "U 10 U n-Nitrosodiphenylamine/Diphenylamine "U 10 U Pentachlorophenol "U 10 U Phenanthrene "U 2.0 U Phenol "U 10 U Pyrene "U 2.0 U 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 19 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2109036 - E 3520 LLE LCS (2109036-BS1)Prepared: 09/16/21 Analyzed: 09/21/21 EPA 8270D (3-and/or 4-)Methylphenol ug/L64.700 10 60.000 55-111108 1,1-Biphenyl "57.080 2.0 60.000 51-11895.1 1,4-Dioxane "37.930 2.0 60.000 41-8963.2 1-Methylnaphthalene "77.860 2.0 60.000 QL-261-127130 2,3,4,6-Tetrachlorophenol "52.010 10 60.000 45-13486.7 2,4,5-Trichlorophenol "59.830 10 60.000 56-13199.7 2,4,6-Trichlorophenol "59.680 10 60.000 56-12899.5 2,4-Dichlorophenol "60.780 10 60.000 63-123101 2,4-Dimethylphenol "60.240 10 60.000 44-106100 2,4-Dinitrophenol "119.45 20 120.00 49-12899.5 2,4-Dinitrotoluene "62.540 10 60.000 58-125104 2,6-Dinitrotoluene "62.540 10 60.000 60-122104 2-Chloronaphthalene "61.150 10 60.000 53-115102 2-Chlorophenol "55.070 10 60.000 55-11791.8 2-Methyl-4,6-dinitrophenol "58.690 10 60.000 62-12597.8 2-Methylnaphthalene "56.280 2.0 60.000 56-11593.8 2-Methylphenol "56.790 10 60.000 52-11194.6 2-Nitroaniline "62.150 10 60.000 58-121104 2-Nitrophenol "57.590 10 60.000 58-12696.0 3,3'-Dichlorobenzidine "43.920 10 60.000 10-14473.2 3-Nitroaniline "57.790 10 60.000 38-14196.3 4-Bromophenyl phenyl ether "58.430 10 60.000 61-11797.4 4-Chloro-3-methylphenol "62.720 10 60.000 64-122105 4-Chloroaniline "27.050 10 60.000 18-10245.1 4-Chlorophenyl phenyl ether "63.390 10 60.000 55-117106 4-Nitroaniline "57.350 10 60.000 15-18595.6 4-Nitrophenol "57.270 10 60.000 38-13095.4 Acenaphthene "59.230 2.0 60.000 53-11598.7 Acenaphthylene "59.510 2.0 60.000 53-11899.2 Acetophenone "61.250 10 60.000 60-112102 Anthracene "57.670 2.0 60.000 65-11096.1 Atrazine "16.490 10 60.000 QL-153-12827.5 Benzaldehyde "50.360 10 60.000 55-15283.9 Benzo(a)anthracene "55.750 2.0 60.000 52-12192.9 Benzo(a)pyrene "48.910 2.0 60.000 60-11581.5 Benzo(b)fluoranthene "54.770 2.0 60.000 58-11791.3 Benzo(g,h,i)perylene "49.980 2.0 60.000 45-10183.3 Benzo(k)fluoranthene "61.770 2.0 60.000 64-124103 Benzyl alcohol "57.780 10 60.000 49-11496.3 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 20 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2109036 - E 3520 LLE LCS (2109036-BS1)Prepared: 09/16/21 Analyzed: 09/21/21 Benzyl butyl phthalate ug/L60.030 10 60.000 58-129100 Bis(2-chloro-1-methylethyl) ether "55.860 10 60.000 55-11393.1 Bis(2-chloroethoxy)methane "59.820 10 60.000 59-11599.7 bis(2-Chloroethyl) Ether "56.650 10 60.000 53-11794.4 Bis(2-ethylhexyl) phthalate "63.520 10 60.000 56-130106 Caprolactam "44.260 10 60.000 33-9473.8 Carbazole "55.070 2.0 60.000 68-11491.8 Chrysene "58.830 2.0 60.000 58-12298.0 Dibenz(a,h)anthracene "54.710 2.0 60.000 46-11391.2 Dibenzofuran "58.900 2.0 60.000 50-13398.2 Diethyl phthalate "63.560 10 60.000 61-118106 Dimethyl phthalate "62.610 10 60.000 58-120104 Di-n-butylphthalate "62.610 10 60.000 63-117104 Di-n-octylphthalate "59.190 10 60.000 60-12598.6 Fluoranthene "60.670 2.0 60.000 68-113101 Fluorene "63.890 2.0 60.000 60-117106 Hexachlorobenzene (HCB)"60.160 10 60.000 56-120100 Hexachlorocyclopentadiene (HCCP)"53.850 10 60.000 18-10389.8 Hexachloroethane "52.350 10 60.000 35-10587.2 Indeno (1,2,3-cd) pyrene "52.730 2.0 60.000 47-11087.9 Isophorone "60.540 10 60.000 60-114101 Naphthalene "57.390 2.0 60.000 55-11395.6 Nitrobenzene "59.400 10 60.000 59-11499.0 n-Nitroso di-n-Propylamine "59.730 10 60.000 58-11399.6 n-Nitrosodiphenylamine/Diphenylamine "60.300 10 60.000 65-115100 Pentachlorophenol "56.430 10 60.000 47-12294.0 Phenanthrene "59.920 2.0 60.000 63-11199.9 Phenol "56.780 10 60.000 47-10494.6 Pyrene "52.320 2.0 60.000 48-12987.2 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 21 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2109036 - E 3520 LLE LCS Dup (2109036-BSD1)Prepared: 09/16/21 Analyzed: 09/21/21 EPA 8270D (3-and/or 4-)Methylphenol ug/L62.050 10 60.000 3055-111103 4.18 1,1-Biphenyl "57.430 2.0 60.000 1851-11895.7 0.611 1,4-Dioxane "35.420 2.0 60.000 5041-8959.0 6.84 1-Methylnaphthalene "78.110 2.0 60.000 21 QL-261-127130 0.321 2,3,4,6-Tetrachlorophenol "52.570 10 60.000 1245-13487.6 1.07 2,4,5-Trichlorophenol "59.770 10 60.000 1456-13199.6 0.100 2,4,6-Trichlorophenol "59.890 10 60.000 1656-12899.8 0.351 2,4-Dichlorophenol "60.230 10 60.000 2563-123100 0.909 2,4-Dimethylphenol "57.520 10 60.000 2744-10695.9 4.62 2,4-Dinitrophenol "123.50 20 120.00 1749-128103 3.33 2,4-Dinitrotoluene "62.610 10 60.000 1058-125104 0.112 2,6-Dinitrotoluene "62.610 10 60.000 1260-122104 0.112 2-Chloronaphthalene "61.700 10 60.000 1953-115103 0.895 2-Chlorophenol "54.040 10 60.000 3555-11790.1 1.89 2-Methyl-4,6-dinitrophenol "59.050 10 60.000 1262-12598.4 0.612 2-Methylnaphthalene "55.950 2.0 60.000 2256-11593.2 0.588 2-Methylphenol "55.090 10 60.000 3352-11191.8 3.04 2-Nitroaniline "61.830 10 60.000 1358-121103 0.516 2-Nitrophenol "58.350 10 60.000 2858-12697.2 1.31 3,3'-Dichlorobenzidine "48.600 10 60.000 5310-14481.0 10.1 3-Nitroaniline "57.370 10 60.000 1938-14195.6 0.729 4-Bromophenyl phenyl ether "59.210 10 60.000 1261-11798.7 1.33 4-Chloro-3-methylphenol "61.240 10 60.000 1764-122102 2.39 4-Chloroaniline "25.540 10 60.000 4918-10242.6 5.74 4-Chlorophenyl phenyl ether "64.250 10 60.000 1755-117107 1.35 4-Nitroaniline "60.410 10 60.000 1915-185101 5.20 4-Nitrophenol "57.870 10 60.000 2338-13096.4 1.04 Acenaphthene "59.850 2.0 60.000 1453-11599.8 1.04 Acenaphthylene "60.530 2.0 60.000 1453-118101 1.70 Acetophenone "59.560 10 60.000 2760-11299.3 2.80 Anthracene "58.290 2.0 60.000 1065-11097.2 1.07 Atrazine "16.340 10 60.000 22 QL-153-12827.2 0.914 Benzaldehyde "49.690 10 60.000 2855-15282.8 1.34 Benzo(a)anthracene "55.910 2.0 60.000 1052-12193.2 0.287 Benzo(a)pyrene "48.620 2.0 60.000 1060-11581.0 0.595 Benzo(b)fluoranthene "52.610 2.0 60.000 2258-11787.7 4.02 Benzo(g,h,i)perylene "52.310 2.0 60.000 2045-10187.2 4.56 Benzo(k)fluoranthene "60.500 2.0 60.000 1964-124101 2.08 Benzyl alcohol "55.630 10 60.000 3449-11492.7 3.79 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 22 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2109036 - E 3520 LLE LCS Dup (2109036-BSD1)Prepared: 09/16/21 Analyzed: 09/21/21 Benzyl butyl phthalate ug/L56.930 10 60.000 1058-12994.9 5.30 Bis(2-chloro-1-methylethyl) ether "55.360 10 60.000 2055-11392.3 0.899 Bis(2-chloroethoxy)methane "58.510 10 60.000 2559-11597.5 2.21 bis(2-Chloroethyl) Ether "56.530 10 60.000 2453-11794.2 0.212 Bis(2-ethylhexyl) phthalate "60.560 10 60.000 3956-130101 4.77 Caprolactam "40.830 10 60.000 3633-9468.0 8.06 Carbazole "56.120 2.0 60.000 1468-11493.5 1.89 Chrysene "58.860 2.0 60.000 1058-12298.1 0.0510 Dibenz(a,h)anthracene "58.270 2.0 60.000 2046-11397.1 6.30 Dibenzofuran "60.030 2.0 60.000 1350-133100 1.90 Diethyl phthalate "63.070 10 60.000 1061-118105 0.774 Dimethyl phthalate "62.360 10 60.000 1158-120104 0.400 Di-n-butylphthalate "63.270 10 60.000 1163-117105 1.05 Di-n-octylphthalate "57.650 10 60.000 1260-12596.1 2.64 Fluoranthene "60.850 2.0 60.000 1068-113101 0.296 Fluorene "64.620 2.0 60.000 1260-117108 1.14 Hexachlorobenzene (HCB)"61.150 10 60.000 1256-120102 1.63 Hexachlorocyclopentadiene (HCCP)"57.810 10 60.000 3218-10396.4 7.09 Hexachloroethane "49.290 10 60.000 4535-10582.2 6.02 Indeno (1,2,3-cd) pyrene "54.550 2.0 60.000 2047-11090.9 3.39 Isophorone "59.860 10 60.000 2060-11499.8 1.13 Naphthalene "57.080 2.0 60.000 2755-11395.1 0.542 Nitrobenzene "58.810 10 60.000 2959-11498.0 0.998 n-Nitroso di-n-Propylamine "59.710 10 60.000 2458-11399.5 0.0335 n-Nitrosodiphenylamine/Diphenylamine "61.230 10 60.000 1065-115102 1.53 Pentachlorophenol "56.460 10 60.000 1147-12294.1 0.0531 Phenanthrene "60.980 2.0 60.000 1063-111102 1.75 Phenol "54.010 10 60.000 3847-10490.0 5.00 Pyrene "50.940 2.0 60.000 1048-12984.9 2.67 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 23 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2109036 - E 3520 LLE Duplicate (2109036-DUP1)Prepared: 09/16/21 Analyzed: 09/21/21 Source: E213804-01 EPA 8270D 1-Methylnaphthalene ug/L422.60 20 422.51 200 QL-2, J0.0207 2-Methylnaphthalene "756.30 20 761.91 2000.739 Acenaphthene "495.40 20 471.76 2004.89 Carbazole "186.10 20 169.25 2009.49 Dibenzofuran "253.30 20 243.42 2003.98 Fluorene "167.10 20 159.70 2004.53 Phenanthrene "195.30 20 181.21 2007.49 Duplicate (2109036-DUP2)Prepared: 09/16/21 Analyzed: 09/21/21 Source: E213804-01RE1 EPA 8270D Naphthalene ug/L5129.0 200 4993.0 2002.69 Duplicate (2109036-DUP3)Prepared: 09/16/21 Analyzed: 09/21/21 Source: E213804-01RE2 EPA 8270D (3-and/or 4-)Methylphenol ug/LU10 U 200 U 1,1-Biphenyl "87.220 2.0 84.141 2003.59 1,4-Dioxane "U 2.0 U 200 U 2,3,4,6-Tetrachlorophenol "U 10 U 200 U 2,4,5-Trichlorophenol "U 10 U 200 U 2,4,6-Trichlorophenol "U 10 U 200 U 2,4-Dichlorophenol "U 10 U 200 U 2,4-Dimethylphenol "U 10 U 200 U 2,4-Dinitrophenol "U 20 U 200 U 2,4-Dinitrotoluene "U 10 U 200 U 2,6-Dinitrotoluene "U 10 U 200 U 2-Chloronaphthalene "U 10 U 200 U 2-Chlorophenol "U 10 U 200 U 2-Methyl-4,6-dinitrophenol "U 10 U 200 U 2-Methylphenol "U 10 U 200 U 2-Nitroaniline "U 10 U 200 U 2-Nitrophenol "U 10 U 200 U 3,3'-Dichlorobenzidine "U 10 U 200 U 3-Nitroaniline "U 10 U 200 U 4-Bromophenyl phenyl ether "U 10 U 200 U 4-Chloro-3-methylphenol "U 10 U 200 U 4-Chloroaniline "U 10 U 200 U 4-Chlorophenyl phenyl ether "U 10 U 200 U 4-Nitroaniline "U 10 U 200 U 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 24 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2109036 - E 3520 LLE Duplicate (2109036-DUP3)Prepared: 09/16/21 Analyzed: 09/21/21 Source: E213804-01RE2 4-Nitrophenol ug/LU10 U 200 U Acenaphthylene "U 2.0 U 200 U Acetophenone "U 10 U 200 U Anthracene "3.5800 2.0 3.3065 2007.94 Atrazine "U 10 U 200 QL-1, J, QR-1, U Benzaldehyde "U 10 U 200 U Benzo(a)anthracene "U 2.0 U 200 U Benzo(a)pyrene "U 2.0 U 200 U Benzo(b)fluoranthene "U 2.0 U 200 U Benzo(g,h,i)perylene "U 2.0 U 200 U Benzo(k)fluoranthene "U 2.0 U 200 U Benzyl alcohol "U 10 U 200 U Benzyl butyl phthalate "U 10 U 200 U Bis(2-chloro-1-methylethyl) ether "U 10 U 200 U Bis(2-chloroethoxy)methane "U 10 U 200 U bis(2-Chloroethyl) Ether "U 10 U 200 U Bis(2-ethylhexyl) phthalate "U 10 U 200 U Caprolactam "U 10 U 200 U Chrysene "U 2.0 U 200 U Dibenz(a,h)anthracene "U 2.0 U 200 U Diethyl phthalate "U 10 U 200 U Dimethyl phthalate "U 10 U 200 U Di-n-butylphthalate "U 10 U 200 U Di-n-octylphthalate "U 10 U 200 U Fluoranthene "9.0100 2.0 8.5226 2005.56 Hexachlorobenzene (HCB)"U 10 U 200 U Hexachlorocyclopentadiene (HCCP)"U 10 U 200 U Hexachloroethane "U 10 U 200 U Indeno (1,2,3-cd) pyrene "U 2.0 U 200 U Isophorone "U 10 U 200 U Nitrobenzene "U 10 U 200 U n-Nitroso di-n-Propylamine "U 10 U 200 U n-Nitrosodiphenylamine/Diphenylamine "U 10 U 200 U Pentachlorophenol "U 10 U 200 U Phenol "U 10 U 200 U Pyrene "4.6600 2.0 4.3116 2007.77 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 25 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2109036 - E 3520 LLE MRL Verification (2109036-PS1)Prepared: 09/16/21 Analyzed: 09/21/21 EPA 8270D (3-and/or 4-)Methylphenol ug/L7.4900 10 10.000 MRL-2, J48-10574.9 1,1-Biphenyl "1.4000 2.0 2.0000 MRL-2, J50-10470.0 1,4-Dioxane "0.95000 2.0 2.0000 MRL-2, J14-11047.5 1-Methylnaphthalene "1.8800 2.0 2.0000 MRL-2, J56-11794.0 2,3,4,6-Tetrachlorophenol "7.4900 10 10.000 MRL-2, J31-11174.9 2,4,5-Trichlorophenol "7.6600 10 10.000 MRL-2, J42-11576.6 2,4,6-Trichlorophenol "7.3300 10 10.000 MRL-2, J47-11073.3 2,4-Dichlorophenol "7.6400 10 10.000 MRL-2, J49-11676.4 2,4-Dimethylphenol "10.730 10 10.000 MRL-216-111107 2,4-Dinitrophenol "18.050 20 20.000 MRL-2, J10-12490.2 2,4-Dinitrotoluene "8.1500 10 10.000 MRL-2, J53-10881.5 2,6-Dinitrotoluene "8.1500 10 10.000 MRL-2, J55-10681.5 2-Chloronaphthalene "7.4900 10 10.000 MRL-2, J51-10474.9 2-Chlorophenol "7.6600 10 10.000 MRL-2, J46-11176.6 2-Methyl-4,6-dinitrophenol "8.7600 10 10.000 MRL-2, J26-11687.6 2-Methylnaphthalene "1.3700 2.0 2.0000 MRL-2, J51-10668.5 2-Methylphenol "7.7800 10 10.000 MRL-2, J42-10877.8 2-Nitroaniline "8.2300 10 10.000 MRL-2, J48-10982.3 2-Nitrophenol "7.8300 10 10.000 MRL-2, J46-12078.3 3,3'-Dichlorobenzidine "5.3300 10 10.000 MRL-2, J10-10353.3 3-Nitroaniline "7.2300 10 10.000 MRL-2, J28-11872.3 4-Bromophenyl phenyl ether "7.5400 10 10.000 MRL-2, J58-10675.4 4-Chloro-3-methylphenol "7.9300 10 10.000 MRL-2, J49-11879.3 4-Chloroaniline "3.2500 10 10.000 MRL-2, J20-8532.5 4-Chlorophenyl phenyl ether "7.0900 10 10.000 MRL-2, J49-10270.9 4-Nitroaniline "8.7200 10 10.000 MRL-2, J10-16587.2 4-Nitrophenol "7.2500 10 10.000 MRL-2, J11-11672.5 Acenaphthene "1.4000 2.0 2.0000 MRL-2, J51-10070.0 Acenaphthylene "1.5000 2.0 2.0000 MRL-2, J52-10475.0 Acetophenone "7.5200 10 10.000 MRL-2, J56-10875.2 Anthracene "1.5800 2.0 2.0000 MRL-2, J48-10879.0 Atrazine "2.4200 10 10.000 MRL-2, QR-1, J 46-12624.2 Benzaldehyde "7.7800 10 10.000 MRL-2, J40-16977.8 Benzo(a)anthracene "1.5100 2.0 2.0000 MRL-2, J52-11775.5 Benzo(a)pyrene "1.2300 2.0 2.0000 MRL-2, J48-11661.5 Benzo(b)fluoranthene "1.6000 2.0 2.0000 MRL-2, J31-14280.0 Benzo(g,h,i)perylene "1.5000 2.0 2.0000 MRL-2, J37-11575.0 Benzo(k)fluoranthene "1.5000 2.0 2.0000 MRL-2, J29-14575.0 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 26 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2109036 - E 3520 LLE MRL Verification (2109036-PS1)Prepared: 09/16/21 Analyzed: 09/21/21 Benzyl alcohol ug/L7.6700 10 10.000 MRL-2, J12-13376.7 Benzyl butyl phthalate "9.0200 10 10.000 MRL-2, J60-13690.2 Bis(2-chloro-1-methylethyl) ether "8.0100 10 10.000 MRL-2, J48-10780.1 Bis(2-chloroethoxy)methane "7.9300 10 10.000 MRL-2, J53-10779.3 bis(2-Chloroethyl) Ether "7.8700 10 10.000 MRL-2, J47-10478.7 Bis(2-ethylhexyl) phthalate "8.7200 10 10.000 MRL-2, J19-17987.2 Caprolactam "6.5400 10 10.000 MRL-2, J32-8765.4 Carbazole "1.5800 2.0 2.0000 MRL-2, J67-11979.0 Chrysene "1.5300 2.0 2.0000 MRL-2, J55-11676.5 Dibenz(a,h)anthracene "1.4900 2.0 2.0000 MRL-2, J33-11874.5 Dibenzofuran "1.5200 2.0 2.0000 MRL-2, J53-11376.0 Diethyl phthalate "8.3600 10 10.000 MRL-2, J53-12983.6 Dimethyl phthalate "8.2400 10 10.000 MRL-2, J59-10782.4 Di-n-butylphthalate "9.8200 10 10.000 MRL-2, J69-13998.2 Di-n-octylphthalate "9.3000 10 10.000 MRL-2, J62-12993.0 Fluoranthene "1.5300 2.0 2.0000 MRL-2, J60-11276.5 Fluorene "1.4600 2.0 2.0000 MRL-2, J55-10173.0 Hexachlorobenzene (HCB)"7.4900 10 10.000 MRL-2, J50-10574.9 Hexachlorocyclopentadiene (HCCP)"11.310 10 10.000 MRL-2, QR-2 10-85113 Hexachloroethane "6.8600 10 10.000 MRL-2, J26-8968.6 Indeno (1,2,3-cd) pyrene "1.3800 2.0 2.0000 MRL-2, J37-11469.0 Isophorone "8.3000 10 10.000 MRL-2, J54-10883.0 Naphthalene "1.7500 2.0 2.0000 MRL-2, J38-13787.5 Nitrobenzene "8.1100 10 10.000 MRL-2, J54-11081.1 n-Nitroso di-n-Propylamine "8.2300 10 10.000 MRL-2, J49-10682.3 n-Nitrosodiphenylamine/Diphenylamine "7.6200 10 10.000 MRL-2, J55-10776.2 Pentachlorophenol "8.3900 10 10.000 MRL-2, J20-13683.9 Phenanthrene "1.5200 2.0 2.0000 MRL-2, J55-11576.0 Phenol "7.9000 10 10.000 MRL-2, J44-9779.0 Pyrene "1.5500 2.0 2.0000 MRL-2, J51-12277.5 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 27 of 28 D.A.R.T. Id: 21-0367 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 21-0367, Holcomb Creosote - Reported by Stacie Masters Notes and Definitions for QC Samples U The analyte was not detected at or above the reporting limit. J The identification of the analyte is acceptable; the reported value is an estimate. MRL-2 MRL verification for Non-Potable Water matrix QL-1 Laboratory Control Spike Recovery less than method control limits QL-2 Laboratory Control Spike Recovery greater than method control limits QR-1 MRL verification recovery less than lower control limits. QR-2 MRL verification recovery greater than upper control limits. 9/28/21 16:39E213804 SVOA FINAL 09 28 21 1639Page 28 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters November 9, 2021 MEMORANDUM SUBJECT: FROM: FINAL Analytical Report Project: 22-0009, Holcomb Creosote Stacie Masters LSB Organic Chemistry Section Chief Laboratory Services Branch John Deatrick, ChiefTHRU: TO:Joydeb Majumder Attached are the final results for the analytical groups listed below. This report shall not be reproduced except in full without approval of the Region 4 laboratory. These analyses were performed in accordance with the Laboratory Services Branch's Laboratory Operations and Quality Assurance Manual (LSB LOQAM) found at www.epa.gov/region4/sesd/asbsop. Any unique project data quality objectives specified in writing by the data requestor have also been incorporated into the data unless otherwise noted in the Report Narrative. Chemistry data have been verified based on the LSB LOQAM specifications and have been qualified by this laboratory if the applicable quality control criteria were not met. Verification is defined in Chapter 5 of the LSB LOQAM. For a listing of specific data qualifiers and explanations, please refer to the Data Qualifier Definitions included in this report. The reported results are accurate within the limits of the method(s) and are representative only of the samples as received by the laboratory. Analyses Included in this report:Method Used:Accreditations: Semi Volatile Organics (SVOA) Semivolatile organic compounds ISOEPA 8270D (Water) 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 1 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Sample Disposal Policy Due to limited space for long term sample storage, LSB’s policy is to dispose of samples on a periodic schedule. Air samples collected in summa canisters will be disposed of 30 days following the issuance of this report. All other sample media including original samples, sample extracts and or digestates will be disposed of, in accordance with applicable regulations, 60 days from the date of this report. This sample disposal policy does not apply to criminal samples which are held until the laboratory is notified by the criminal investigators that case development and litigation are complete. These samples may be held in the laboratory's custody for a longer period of time. If samples require storage beyond the 60-day period, please contact the Sample Control Coordinator by e-mail at R4SampleCustody@epa.gov. cc: Nardina Turner 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 2 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Date ReceivedDate CollectedMatrixLaboratory IDSample ID SAMPLES INCLUDED IN THIS REPORT Project: 22-0009, Holcomb Creosote MW-2 E214202-01 Groundwater 10/13/21 15:25 10/14/21 12:30 MW-57 E214202-02 Groundwater 10/13/21 17:10 10/14/21 12:30 MW-58 E214202-03 Groundwater 10/13/21 17:28 10/14/21 12:30 MW-6 E214202-04 Groundwater 10/13/21 15:18 10/14/21 12:30 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 3 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters DATA QUALIFIER DEFINITIONS U The analyte was not detected at or above the reporting limit. J The identification of the analyte is acceptable; the reported value is an estimate. NJ Presumptive evidence that analyte is present; reported as a tentative identification with an estimated value. Q-2 Result greater than MDL but less than MRL. QC-1 Analyte concentration low in continuing calibration verification standard QC-2 Analyte concentration high in continuing calibration verification standard QL-1 Laboratory Control Spike Recovery less than method control limits QL-2 Laboratory Control Spike Recovery greater than method control limits QR-1 MRL verification recovery less than lower control limits. 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 4 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters ACRONYMS AND ABBREVIATIONS CAS Chemical Abstracts Service Note: Analytes with no known CAS identifiers have been assigned codes beginning with "E", the EPA ID as assigned by the EPA Substance Registry System (www.epa.gov/srs), or beginning with "R4-", a unique identifier assigned by the EPA Region 4 laboratory. MDL Method Detection Limit - The minimum concentration of a substance (an analyte) that can be measured and reported with a 99% confidence that the analyte concentration is greater than zero. MRL Minimum Reporting Limit - Analyte concentration that corresponds to the lowest demonstrated level of acceptable quantitation. The MRL is sample-specific and accounts for preparation weights and volumes, dilutions, and moisture content of soil/sediments. TIC Tentatively Identified Compound - An analyte identified based on a match with the instrument software's mass spectral library. A calibration standard has not been analyzed to confirm the compound's identification or the estimated concentration reported. ACCREDITATIONS: ISO Accredited to ISO/IEC 17025:2017 and accreditation requirements for Forensic Science Testing Laboratories. Refer to the certificate and scope of accreditation FT-0330 at: http://www.epa.gov/aboutepa/about-region-4s-science-and-ecosystem-support-division-sesd NR Not accredited for this test. DW Accredited for conformance with ISO/IEC 17025:2017 and testing elements in the Fifth Edition of the Manual for the Certification of Laboratories Analyzing Drinking Water, EPA 815-R-05-004, 2005. Refer to the certificate and scope of accreditation AT-2628 at: http://www.epa.gov/aboutepa/about-region-4s-science-and-ecosystem-support-division-sesd ISO/DW Accredited to ISO/IEC 17025:2017 and accreditation requirements for Forensic Science Testing Labs, and conformance with ISO/IEC 17025:2017 and testing elements in the Manual for the Certification of Laboratories Analyzing Drinking Water. 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 5 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-2 E214202-01 Matrix:Groundwater Date Collected:10/13/21 15:25 Project: 22-0009, Holcomb Creosote Station ID:MW-2 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 10(3-and/or 4-)Methylphenol ug/L EPA 8270D10U1319-77-3 10/22/2113:3310/18/21 8:19 2.11,1-Biphenyl ug/L EPA 8270D96J, QC-292-52-4 10/22/2113:3310/18/21 8:19 2.11,4-Dioxane ug/L EPA 8270D2.1 U123-91-1 10/22/2113:3310/18/21 8:19 411-Methylnaphthalene ug/L EPA 8270D540J, QL-290-12-0 10/22/2115:5310/18/21 8:19 102,3,4,6-Tetrachlorophenol ug/L EPA 8270D10U58-90-2 10/22/2113:3310/18/21 8:19 102,4,5-Trichlorophenol ug/L EPA 8270D10U95-95-4 10/22/2113:3310/18/21 8:19 102,4,6-Trichlorophenol ug/L EPA 8270D10U88-06-2 10/22/2113:3310/18/21 8:19 102,4-Dichlorophenol ug/L EPA 8270D10U120-83-2 10/22/2113:3310/18/21 8:19 102,4-Dimethylphenol ug/L EPA 8270D10U105-67-9 10/22/2113:3310/18/21 8:19 212,4-Dinitrophenol ug/L EPA 8270D21U51-28-5 10/22/2113:3310/18/21 8:19 102,4-Dinitrotoluene ug/L EPA 8270D10U121-14-2 10/22/2113:3310/18/21 8:19 102,6-Dinitrotoluene ug/L EPA 8270D10U606-20-2 10/22/2113:3310/18/21 8:19 102-Chloronaphthalene ug/L EPA 8270D10U91-58-7 10/22/2113:3310/18/21 8:19 102-Chlorophenol ug/L EPA 8270D10U95-57-8 10/22/2113:3310/18/21 8:19 102-Methyl-4,6-dinitrophenol ug/L EPA 8270D10U534-52-1 10/22/2113:3310/18/21 8:19 412-Methylnaphthalene ug/L EPA 8270D100091-57-6 10/22/2115:5310/18/21 8:19 102-Methylphenol ug/L EPA 8270D10U95-48-7 10/22/2113:3310/18/21 8:19 102-Nitroaniline ug/L EPA 8270D10U88-74-4 10/22/2113:3310/18/21 8:19 102-Nitrophenol ug/L EPA 8270D10U88-75-5 10/22/2113:3310/18/21 8:19 103,3'-Dichlorobenzidine ug/L EPA 8270D10U91-94-1 10/22/2113:3310/18/21 8:19 103-Nitroaniline ug/L EPA 8270D10U99-09-2 10/22/2113:3310/18/21 8:19 104-Bromophenyl phenyl ether ug/L EPA 8270D10U101-55-3 10/22/2113:3310/18/21 8:19 104-Chloro-3-methylphenol ug/L EPA 8270D10U59-50-7 10/22/2113:3310/18/21 8:19 104-Chloroaniline ug/L EPA 8270D10U106-47-8 10/22/2113:3310/18/21 8:19 104-Chlorophenyl phenyl ether ug/L EPA 8270D10U7005-72-3 10/22/2113:3310/18/21 8:19 104-Nitroaniline ug/L EPA 8270D10U100-01-6 10/22/2113:3310/18/21 8:19 104-Nitrophenol ug/L EPA 8270D10U100-02-7 10/22/2113:3310/18/21 8:19 41Acenaphtheneug/L EPA 8270D59083-32-9 10/22/2115:5310/18/21 8:19 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 6 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-2 E214202-01 Matrix:Groundwater Date Collected:10/13/21 15:25 Project: 22-0009, Holcomb Creosote Station ID:MW-2 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 2.1Acenaphthyleneug/L EPA 8270D2.1 U208-96-8 10/22/2113:3310/18/21 8:19 10Acetophenoneug/L EPA 8270D10U98-86-2 10/22/2113:3310/18/21 8:19 2.1Anthraceneug/L EPA 8270D3.9120-12-7 10/22/2113:3310/18/21 8:19 10Atrazineug/L EPA 8270D10U, J, QL-1, QR-1, QC-1 1912-24-9 10/22/2113:3310/18/21 8:19 10Benzaldehydeug/L EPA 8270D10U100-52-7 10/22/2113:3310/18/21 8:19 2.1Benzo(a)anthracene ug/L EPA 8270D2.1 U56-55-3 10/22/2113:3310/18/21 8:19 2.1Benzo(a)pyrene ug/L EPA 8270D2.1 U50-32-8 10/22/2113:3310/18/21 8:19 2.1Benzo(b)fluoranthene ug/L EPA 8270D2.1 U205-99-2 10/22/2113:3310/18/21 8:19 2.1Benzo(g,h,i)perylene ug/L EPA 8270D2.1 U191-24-2 10/22/2113:3310/18/21 8:19 2.1Benzo(k)fluoranthene ug/L EPA 8270D2.1 U207-08-9 10/22/2113:3310/18/21 8:19 10Benzyl alcohol ug/L EPA 8270D10U100-51-6 10/22/2113:3310/18/21 8:19 10Benzyl butyl phthalate ug/L EPA 8270D10U85-68-7 10/22/2113:3310/18/21 8:19 10Bis(2-chloro-1-methylethyl) ether ug/L EPA 8270D10U108-60-1 10/22/2113:3310/18/21 8:19 10Bis(2-chloroethoxy)methane ug/L EPA 8270D10U111-91-1 10/22/2113:3310/18/21 8:19 10bis(2-Chloroethyl) Ether ug/L EPA 8270D10U111-44-4 10/22/2113:3310/18/21 8:19 10Bis(2-ethylhexyl) phthalate ug/L EPA 8270D10U117-81-7 10/22/2113:3310/18/21 8:19 10Caprolactamug/L EPA 8270D10U105-60-2 10/22/2113:3310/18/21 8:19 41Carbazoleug/L EPA 8270D15086-74-8 10/22/2115:5310/18/21 8:19 2.1Chryseneug/L EPA 8270D2.1 U218-01-9 10/22/2113:3310/18/21 8:19 2.1Dibenz(a,h)anthracene ug/L EPA 8270D2.1 U53-70-3 10/22/2113:3310/18/21 8:19 41Dibenzofuranug/L EPA 8270D280132-64-9 10/22/2115:5310/18/21 8:19 10Diethyl phthalate ug/L EPA 8270D10U84-66-2 10/22/2113:3310/18/21 8:19 10Dimethyl phthalate ug/L EPA 8270D10U131-11-3 10/22/2113:3310/18/21 8:19 10Di-n-butylphthalate ug/L EPA 8270D10U84-74-2 10/22/2113:3310/18/21 8:19 10Di-n-octylphthalate ug/L EPA 8270D10U117-84-0 10/22/2113:3310/18/21 8:19 2.1Fluorantheneug/L EPA 8270D12206-44-0 10/22/2113:3310/18/21 8:19 41Fluoreneug/L EPA 8270D190J, QL-286-73-7 10/22/2115:5310/18/21 8:19 10Hexachlorobenzene (HCB)ug/L EPA 8270D10U118-74-1 10/22/2113:3310/18/21 8:19 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 7 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-2 E214202-01 Matrix:Groundwater Date Collected:10/13/21 15:25 Project: 22-0009, Holcomb Creosote Station ID:MW-2 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 10Hexachlorocyclopentadiene (HCCP)ug/L EPA 8270D10U77-47-4 10/22/2113:3310/18/21 8:19 10Hexachloroethaneug/L EPA 8270D10U67-72-1 10/22/2113:3310/18/21 8:19 2.1Indeno (1,2,3-cd) pyrene ug/L EPA 8270D2.1 U193-39-5 10/22/2113:3310/18/21 8:19 10Isophoroneug/L EPA 8270D10U78-59-1 10/22/2113:3310/18/21 8:19 210Naphthaleneug/L EPA 8270D280091-20-3 10/26/2115:2710/18/21 8:19 10Nitrobenzeneug/L EPA 8270D10U98-95-3 10/22/2113:3310/18/21 8:19 10n-Nitroso di-n-Propylamine ug/L EPA 8270D10U621-64-7 10/22/2113:3310/18/21 8:19 10n-Nitrosodiphenylamine/Diphenylamine ug/L EPA 8270D10U122-39-4 10/22/2113:3310/18/21 8:19 10Pentachlorophenolug/L EPA 8270D10U87-86-5 10/22/2113:3310/18/21 8:19 41Phenanthreneug/L EPA 8270D22085-01-8 10/22/2115:5310/18/21 8:19 10Phenolug/L EPA 8270D10U108-95-2 10/22/2113:3310/18/21 8:19 2.1Pyreneug/L EPA 8270D5.4129-00-0 10/22/2113:3310/18/21 8:19 Tentatively Identified Compounds: 10 EPA 8270Dug/L10Tentatively Identified Compounds UR4-0000 10/22/2113:3310/18/21 8:19 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 8 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-57 E214202-02 Matrix:Groundwater Date Collected:10/13/21 17:10 Project: 22-0009, Holcomb Creosote Station ID:MW-57 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 9.9(3-and/or 4-)Methylphenol ug/L EPA 8270D9.9 U1319-77-3 10/22/2114:0110/18/21 8:19 991,1-Biphenyl ug/L EPA 8270D140J, QC-292-52-4 10/25/2115:2510/18/21 8:19 2.01,4-Dioxane ug/L EPA 8270D2.0 U123-91-1 10/22/2114:0110/18/21 8:19 991-Methylnaphthalene ug/L EPA 8270D220J, QL-290-12-0 10/25/2115:2510/18/21 8:19 9.92,3,4,6-Tetrachlorophenol ug/L EPA 8270D9.9 U58-90-2 10/22/2114:0110/18/21 8:19 9.92,4,5-Trichlorophenol ug/L EPA 8270D9.9 U95-95-4 10/22/2114:0110/18/21 8:19 9.92,4,6-Trichlorophenol ug/L EPA 8270D9.9 U88-06-2 10/22/2114:0110/18/21 8:19 5002,4-Dichlorophenol ug/L EPA 8270D500U120-83-2 10/25/2115:2510/18/21 8:19 5002,4-Dimethylphenol ug/L EPA 8270D500U105-67-9 10/25/2115:2510/18/21 8:19 202,4-Dinitrophenol ug/L EPA 8270D20U51-28-5 10/22/2114:0110/18/21 8:19 9.92,4-Dinitrotoluene ug/L EPA 8270D9.9 U121-14-2 10/22/2114:0110/18/21 8:19 9.92,6-Dinitrotoluene ug/L EPA 8270D9.9 U606-20-2 10/22/2114:0110/18/21 8:19 9.92-Chloronaphthalene ug/L EPA 8270D9.9 U91-58-7 10/22/2114:0110/18/21 8:19 9.92-Chlorophenol ug/L EPA 8270D9.9 U95-57-8 10/22/2114:0110/18/21 8:19 9.92-Methyl-4,6-dinitrophenol ug/L EPA 8270D9.9 U534-52-1 10/22/2114:0110/18/21 8:19 992-Methylnaphthalene ug/L EPA 8270D45091-57-6 10/25/2115:2510/18/21 8:19 9.92-Methylphenol ug/L EPA 8270D9.9 U95-48-7 10/22/2114:0110/18/21 8:19 9.92-Nitroaniline ug/L EPA 8270D9.9 U88-74-4 10/22/2114:0110/18/21 8:19 5002-Nitrophenol ug/L EPA 8270D500U88-75-5 10/25/2115:2510/18/21 8:19 9.93,3'-Dichlorobenzidine ug/L EPA 8270D9.9 U91-94-1 10/22/2114:0110/18/21 8:19 9.93-Nitroaniline ug/L EPA 8270D9.9 U99-09-2 10/22/2114:0110/18/21 8:19 9.94-Bromophenyl phenyl ether ug/L EPA 8270D9.9 U101-55-3 10/22/2114:0110/18/21 8:19 5004-Chloro-3-methylphenol ug/L EPA 8270D500U59-50-7 10/25/2115:2510/18/21 8:19 5004-Chloroaniline ug/L EPA 8270D500U, J, QC-1106-47-8 10/25/2115:2510/18/21 8:19 9.94-Chlorophenyl phenyl ether ug/L EPA 8270D9.9 U7005-72-3 10/22/2114:0110/18/21 8:19 9.94-Nitroaniline ug/L EPA 8270D9.9 U100-01-6 10/22/2114:0110/18/21 8:19 9.94-Nitrophenol ug/L EPA 8270D9.9 U100-02-7 10/22/2114:0110/18/21 8:19 2.0Acenaphtheneug/L EPA 8270D5083-32-9 10/22/2114:0110/18/21 8:19 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 9 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-57 E214202-02 Matrix:Groundwater Date Collected:10/13/21 17:10 Project: 22-0009, Holcomb Creosote Station ID:MW-57 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 2.0Acenaphthyleneug/L EPA 8270D3.2208-96-8 10/22/2114:0110/18/21 8:19 9.9Acetophenoneug/L EPA 8270D7.4 J, Q-298-86-2 10/22/2114:0110/18/21 8:19 2.0Anthraceneug/L EPA 8270D2.0 U120-12-7 10/22/2114:0110/18/21 8:19 9.9Atrazineug/L EPA 8270D9.9 U, J, QL-1, QR-1, QC-1 1912-24-9 10/22/2114:0110/18/21 8:19 9.9Benzaldehydeug/L EPA 8270D9.9 U100-52-7 10/22/2114:0110/18/21 8:19 2.0Benzo(a)anthracene ug/L EPA 8270D2.0 U56-55-3 10/22/2114:0110/18/21 8:19 2.0Benzo(a)pyrene ug/L EPA 8270D2.0 U50-32-8 10/22/2114:0110/18/21 8:19 2.0Benzo(b)fluoranthene ug/L EPA 8270D2.0 U205-99-2 10/22/2114:0110/18/21 8:19 2.0Benzo(g,h,i)perylene ug/L EPA 8270D2.0 U191-24-2 10/22/2114:0110/18/21 8:19 2.0Benzo(k)fluoranthene ug/L EPA 8270D2.0 U207-08-9 10/22/2114:0110/18/21 8:19 9.9Benzyl alcohol ug/L EPA 8270D9.9 U100-51-6 10/22/2114:0110/18/21 8:19 9.9Benzyl butyl phthalate ug/L EPA 8270D9.9 U85-68-7 10/22/2114:0110/18/21 8:19 9.9Bis(2-chloro-1-methylethyl) ether ug/L EPA 8270D9.9 U108-60-1 10/22/2114:0110/18/21 8:19 500Bis(2-chloroethoxy)methane ug/L EPA 8270D500U111-91-1 10/25/2115:2510/18/21 8:19 9.9bis(2-Chloroethyl) Ether ug/L EPA 8270D9.9 U111-44-4 10/22/2114:0110/18/21 8:19 9.9Bis(2-ethylhexyl) phthalate ug/L EPA 8270D9.9 U117-81-7 10/22/2114:0110/18/21 8:19 500Caprolactamug/L EPA 8270D500U105-60-2 10/25/2115:2510/18/21 8:19 2.0Carbazoleug/L EPA 8270D8.386-74-8 10/22/2114:0110/18/21 8:19 2.0Chryseneug/L EPA 8270D2.0 U218-01-9 10/22/2114:0110/18/21 8:19 2.0Dibenz(a,h)anthracene ug/L EPA 8270D2.0 U53-70-3 10/22/2114:0110/18/21 8:19 99Dibenzofuranug/L EPA 8270D260132-64-9 10/25/2115:2510/18/21 8:19 9.9Diethyl phthalate ug/L EPA 8270D9.9 U84-66-2 10/22/2114:0110/18/21 8:19 9.9Dimethyl phthalate ug/L EPA 8270D9.9 U131-11-3 10/22/2114:0110/18/21 8:19 9.9Di-n-butylphthalate ug/L EPA 8270D9.9 U84-74-2 10/22/2114:0110/18/21 8:19 9.9Di-n-octylphthalate ug/L EPA 8270D9.9 U117-84-0 10/22/2114:0110/18/21 8:19 2.0Fluorantheneug/L EPA 8270D0.49 J, Q-2206-44-0 10/22/2114:0110/18/21 8:19 2.0Fluoreneug/L EPA 8270D4.6 J, QL-286-73-7 10/22/2114:0110/18/21 8:19 9.9Hexachlorobenzene (HCB)ug/L EPA 8270D9.9 U118-74-1 10/22/2114:0110/18/21 8:19 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 10 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-57 E214202-02 Matrix:Groundwater Date Collected:10/13/21 17:10 Project: 22-0009, Holcomb Creosote Station ID:MW-57 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 9.9Hexachlorocyclopentadiene (HCCP)ug/L EPA 8270D9.9 U77-47-4 10/22/2114:0110/18/21 8:19 9.9Hexachloroethaneug/L EPA 8270D9.9 U67-72-1 10/22/2114:0110/18/21 8:19 2.0Indeno (1,2,3-cd) pyrene ug/L EPA 8270D2.0 U193-39-5 10/22/2114:0110/18/21 8:19 500Isophoroneug/L EPA 8270D500U78-59-1 10/25/2115:2510/18/21 8:19 990Naphthaleneug/L EPA 8270D580091-20-3 10/25/2116:4910/18/21 8:19 500Nitrobenzeneug/L EPA 8270D500U98-95-3 10/25/2115:2510/18/21 8:19 9.9n-Nitroso di-n-Propylamine ug/L EPA 8270D9.9 U621-64-7 10/22/2114:0110/18/21 8:19 9.9n-Nitrosodiphenylamine/Diphenylamine ug/L EPA 8270D9.9 U122-39-4 10/22/2114:0110/18/21 8:19 9.9Pentachlorophenolug/L EPA 8270D9.9 U87-86-5 10/22/2114:0110/18/21 8:19 2.0Phenanthreneug/L EPA 8270D3.585-01-8 10/22/2114:0110/18/21 8:19 9.9Phenolug/L EPA 8270D9.9 U108-95-2 10/22/2114:0110/18/21 8:19 2.0Pyreneug/L EPA 8270D2.0 U129-00-0 10/22/2114:0110/18/21 8:19 Tentatively Identified Compounds: EPA 8270Dug/L100Acenaphthylenone (TIC)NJR4-8001314 10/22/2114:0110/18/21 8:19 EPA 8270Dug/L20Dibenzothiophenesulfone (TIC)NJR4-8001501 10/22/2114:0110/18/21 8:19 EPA 8270Dug/L40Dimethylnaphthalene (TIC)NJR4-6507 10/22/2114:0110/18/21 8:19 EPA 8270Dug/L10Ethylnaphthalene (TIC)NJR4-8000051 10/22/2114:0110/18/21 8:19 EPA 8270Dug/L100Fluorenone (TIC)NJR4-6621 10/22/2114:0110/18/21 8:19 EPA 8270Dug/L20Isobenzofuranone (TIC)NJR4-8001500 10/22/2114:0110/18/21 8:19 EPA 8270Dug/L50Naphthalenecarbonitrile (TIC)NJR4-8000140 10/22/2114:0110/18/21 8:19 EPA 8270Dug/L20Naphthalic anhydride (TIC)NJR4-8000105 10/22/2114:0110/18/21 8:19 EPA 8270Dug/L20Phenanthridinone (TIC)NJR4-8000020 10/22/2114:0110/18/21 8:19 EPA 8270Dug/L70Unidentified Compound(s)JR4-6501 10/22/2114:0110/18/21 8:19 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 11 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-58 E214202-03 Matrix:Groundwater Date Collected:10/13/21 17:28 Project: 22-0009, Holcomb Creosote Station ID:MW-58 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 10(3-and/or 4-)Methylphenol ug/L EPA 8270D10U1319-77-3 10/22/2114:2910/18/21 8:19 2.01,1-Biphenyl ug/L EPA 8270D110J, QC-292-52-4 10/22/2114:2910/18/21 8:19 2.01,4-Dioxane ug/L EPA 8270D2.0 U123-91-1 10/22/2114:2910/18/21 8:19 411-Methylnaphthalene ug/L EPA 8270D120J, QL-290-12-0 10/25/2115:5310/18/21 8:19 102,3,4,6-Tetrachlorophenol ug/L EPA 8270D10U58-90-2 10/22/2114:2910/18/21 8:19 102,4,5-Trichlorophenol ug/L EPA 8270D10U95-95-4 10/22/2114:2910/18/21 8:19 102,4,6-Trichlorophenol ug/L EPA 8270D10U88-06-2 10/22/2114:2910/18/21 8:19 102,4-Dichlorophenol ug/L EPA 8270D10U120-83-2 10/22/2114:2910/18/21 8:19 102,4-Dimethylphenol ug/L EPA 8270D10U105-67-9 10/22/2114:2910/18/21 8:19 202,4-Dinitrophenol ug/L EPA 8270D20U51-28-5 10/22/2114:2910/18/21 8:19 102,4-Dinitrotoluene ug/L EPA 8270D10U121-14-2 10/22/2114:2910/18/21 8:19 102,6-Dinitrotoluene ug/L EPA 8270D10U606-20-2 10/22/2114:2910/18/21 8:19 102-Chloronaphthalene ug/L EPA 8270D10U91-58-7 10/22/2114:2910/18/21 8:19 102-Chlorophenol ug/L EPA 8270D10U95-57-8 10/22/2114:2910/18/21 8:19 102-Methyl-4,6-dinitrophenol ug/L EPA 8270D10U534-52-1 10/22/2114:2910/18/21 8:19 412-Methylnaphthalene ug/L EPA 8270D23091-57-6 10/25/2115:5310/18/21 8:19 102-Methylphenol ug/L EPA 8270D10U95-48-7 10/22/2114:2910/18/21 8:19 102-Nitroaniline ug/L EPA 8270D10U88-74-4 10/22/2114:2910/18/21 8:19 102-Nitrophenol ug/L EPA 8270D10U88-75-5 10/22/2114:2910/18/21 8:19 103,3'-Dichlorobenzidine ug/L EPA 8270D10U91-94-1 10/22/2114:2910/18/21 8:19 103-Nitroaniline ug/L EPA 8270D10U99-09-2 10/22/2114:2910/18/21 8:19 104-Bromophenyl phenyl ether ug/L EPA 8270D10U101-55-3 10/22/2114:2910/18/21 8:19 104-Chloro-3-methylphenol ug/L EPA 8270D10U59-50-7 10/22/2114:2910/18/21 8:19 104-Chloroaniline ug/L EPA 8270D10U106-47-8 10/22/2114:2910/18/21 8:19 104-Chlorophenyl phenyl ether ug/L EPA 8270D10U7005-72-3 10/22/2114:2910/18/21 8:19 104-Nitroaniline ug/L EPA 8270D10U100-01-6 10/22/2114:2910/18/21 8:19 104-Nitrophenol ug/L EPA 8270D10U100-02-7 10/22/2114:2910/18/21 8:19 2.0Acenaphtheneug/L EPA 8270D9.583-32-9 10/22/2114:2910/18/21 8:19 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 12 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-58 E214202-03 Matrix:Groundwater Date Collected:10/13/21 17:28 Project: 22-0009, Holcomb Creosote Station ID:MW-58 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 2.0Acenaphthyleneug/L EPA 8270D2.0 U208-96-8 10/22/2114:2910/18/21 8:19 10Acetophenoneug/L EPA 8270D10U98-86-2 10/22/2114:2910/18/21 8:19 2.0Anthraceneug/L EPA 8270D2.0 U120-12-7 10/22/2114:2910/18/21 8:19 10Atrazineug/L EPA 8270D10U, J, QL-1, QR-1, QC-1 1912-24-9 10/22/2114:2910/18/21 8:19 10Benzaldehydeug/L EPA 8270D10U100-52-7 10/22/2114:2910/18/21 8:19 2.0Benzo(a)anthracene ug/L EPA 8270D2.0 U56-55-3 10/22/2114:2910/18/21 8:19 2.0Benzo(a)pyrene ug/L EPA 8270D2.0 U50-32-8 10/22/2114:2910/18/21 8:19 2.0Benzo(b)fluoranthene ug/L EPA 8270D2.0 U205-99-2 10/22/2114:2910/18/21 8:19 2.0Benzo(g,h,i)perylene ug/L EPA 8270D2.0 U191-24-2 10/22/2114:2910/18/21 8:19 2.0Benzo(k)fluoranthene ug/L EPA 8270D2.0 U207-08-9 10/22/2114:2910/18/21 8:19 10Benzyl alcohol ug/L EPA 8270D10U100-51-6 10/22/2114:2910/18/21 8:19 10Benzyl butyl phthalate ug/L EPA 8270D10U85-68-7 10/22/2114:2910/18/21 8:19 10Bis(2-chloro-1-methylethyl) ether ug/L EPA 8270D10U108-60-1 10/22/2114:2910/18/21 8:19 10Bis(2-chloroethoxy)methane ug/L EPA 8270D10U111-91-1 10/22/2114:2910/18/21 8:19 10bis(2-Chloroethyl) Ether ug/L EPA 8270D10U111-44-4 10/22/2114:2910/18/21 8:19 10Bis(2-ethylhexyl) phthalate ug/L EPA 8270D10U117-81-7 10/22/2114:2910/18/21 8:19 10Caprolactamug/L EPA 8270D10U105-60-2 10/22/2114:2910/18/21 8:19 2.0Carbazoleug/L EPA 8270D2.086-74-8 10/22/2114:2910/18/21 8:19 2.0Chryseneug/L EPA 8270D2.0 U218-01-9 10/22/2114:2910/18/21 8:19 2.0Dibenz(a,h)anthracene ug/L EPA 8270D2.0 U53-70-3 10/22/2114:2910/18/21 8:19 41Dibenzofuranug/L EPA 8270D240132-64-9 10/25/2115:5310/18/21 8:19 10Diethyl phthalate ug/L EPA 8270D10U84-66-2 10/22/2114:2910/18/21 8:19 10Dimethyl phthalate ug/L EPA 8270D10U131-11-3 10/22/2114:2910/18/21 8:19 10Di-n-butylphthalate ug/L EPA 8270D10U84-74-2 10/22/2114:2910/18/21 8:19 10Di-n-octylphthalate ug/L EPA 8270D10U117-84-0 10/22/2114:2910/18/21 8:19 2.0Fluorantheneug/L EPA 8270D0.73 J, Q-2206-44-0 10/22/2114:2910/18/21 8:19 2.0Fluoreneug/L EPA 8270D0.82 J, QL-2, Q-286-73-7 10/22/2114:2910/18/21 8:19 10Hexachlorobenzene (HCB)ug/L EPA 8270D10U118-74-1 10/22/2114:2910/18/21 8:19 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 13 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-58 E214202-03 Matrix:Groundwater Date Collected:10/13/21 17:28 Project: 22-0009, Holcomb Creosote Station ID:MW-58 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 10Hexachlorocyclopentadiene (HCCP)ug/L EPA 8270D10U77-47-4 10/22/2114:2910/18/21 8:19 10Hexachloroethaneug/L EPA 8270D10U67-72-1 10/22/2114:2910/18/21 8:19 2.0Indeno (1,2,3-cd) pyrene ug/L EPA 8270D2.0 U193-39-5 10/22/2114:2910/18/21 8:19 10Isophoroneug/L EPA 8270D10U78-59-1 10/22/2114:2910/18/21 8:19 410Naphthaleneug/L EPA 8270D300091-20-3 10/25/2117:1710/18/21 8:19 10Nitrobenzeneug/L EPA 8270D10U98-95-3 10/22/2114:2910/18/21 8:19 10n-Nitroso di-n-Propylamine ug/L EPA 8270D10U621-64-7 10/22/2114:2910/18/21 8:19 10n-Nitrosodiphenylamine/Diphenylamine ug/L EPA 8270D10U122-39-4 10/22/2114:2910/18/21 8:19 10Pentachlorophenolug/L EPA 8270D10U87-86-5 10/22/2114:2910/18/21 8:19 2.0Phenanthreneug/L EPA 8270D0.53 J, Q-285-01-8 10/22/2114:2910/18/21 8:19 10Phenolug/L EPA 8270D10U108-95-2 10/22/2114:2910/18/21 8:19 2.0Pyreneug/L EPA 8270D2.0 U129-00-0 10/22/2114:2910/18/21 8:19 Tentatively Identified Compounds: EPA 8270Dug/L40Acenaphthylenone (TIC)NJR4-8001314 10/22/2114:2910/18/21 8:19 EPA 8270Dug/L40Dimethylnaphthalene (TIC)NJR4-6507 10/22/2114:2910/18/21 8:19 EPA 8270Dug/L100Fluorenone (TIC)NJR4-6621 10/22/2114:2910/18/21 8:19 EPA 8270Dug/L10Hydroxyfluorenone (TIC)NJR4-8001502 10/22/2114:2910/18/21 8:19 EPA 8270Dug/L30Naphthalenecarbonitrile (TIC)NJR4-8000140 10/22/2114:2910/18/21 8:19 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 14 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-6 E214202-04 Matrix:Groundwater Date Collected:10/13/21 15:18 Project: 22-0009, Holcomb Creosote Station ID:MW-6 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 10(3-and/or 4-)Methylphenol ug/L EPA 8270D10U1319-77-3 10/22/2114:5710/18/21 8:19 411,1-Biphenyl ug/L EPA 8270D120J, QC-292-52-4 10/25/2116:2110/18/21 8:19 2.11,4-Dioxane ug/L EPA 8270D2.1 U123-91-1 10/22/2114:5710/18/21 8:19 411-Methylnaphthalene ug/L EPA 8270D250J, QL-290-12-0 10/25/2116:2110/18/21 8:19 102,3,4,6-Tetrachlorophenol ug/L EPA 8270D10U58-90-2 10/22/2114:5710/18/21 8:19 102,4,5-Trichlorophenol ug/L EPA 8270D10U95-95-4 10/22/2114:5710/18/21 8:19 102,4,6-Trichlorophenol ug/L EPA 8270D10U88-06-2 10/22/2114:5710/18/21 8:19 2102,4-Dichlorophenol ug/L EPA 8270D210U120-83-2 10/25/2116:2110/18/21 8:19 2102,4-Dimethylphenol ug/L EPA 8270D210U105-67-9 10/25/2116:2110/18/21 8:19 212,4-Dinitrophenol ug/L EPA 8270D21U51-28-5 10/22/2114:5710/18/21 8:19 102,4-Dinitrotoluene ug/L EPA 8270D10U121-14-2 10/22/2114:5710/18/21 8:19 102,6-Dinitrotoluene ug/L EPA 8270D10U606-20-2 10/22/2114:5710/18/21 8:19 102-Chloronaphthalene ug/L EPA 8270D10U91-58-7 10/22/2114:5710/18/21 8:19 102-Chlorophenol ug/L EPA 8270D10U95-57-8 10/22/2114:5710/18/21 8:19 102-Methyl-4,6-dinitrophenol ug/L EPA 8270D10U534-52-1 10/22/2114:5710/18/21 8:19 412-Methylnaphthalene ug/L EPA 8270D58091-57-6 10/25/2116:2110/18/21 8:19 102-Methylphenol ug/L EPA 8270D10U95-48-7 10/22/2114:5710/18/21 8:19 102-Nitroaniline ug/L EPA 8270D10U88-74-4 10/22/2114:5710/18/21 8:19 2102-Nitrophenol ug/L EPA 8270D210U88-75-5 10/25/2116:2110/18/21 8:19 103,3'-Dichlorobenzidine ug/L EPA 8270D10U91-94-1 10/22/2114:5710/18/21 8:19 103-Nitroaniline ug/L EPA 8270D10U99-09-2 10/22/2114:5710/18/21 8:19 104-Bromophenyl phenyl ether ug/L EPA 8270D10U101-55-3 10/22/2114:5710/18/21 8:19 2104-Chloro-3-methylphenol ug/L EPA 8270D210U59-50-7 10/25/2116:2110/18/21 8:19 2104-Chloroaniline ug/L EPA 8270D210U, J, QC-1106-47-8 10/25/2116:2110/18/21 8:19 104-Chlorophenyl phenyl ether ug/L EPA 8270D10U7005-72-3 10/22/2114:5710/18/21 8:19 104-Nitroaniline ug/L EPA 8270D10U100-01-6 10/22/2114:5710/18/21 8:19 104-Nitrophenol ug/L EPA 8270D10U100-02-7 10/22/2114:5710/18/21 8:19 41Acenaphtheneug/L EPA 8270D13083-32-9 10/25/2116:2110/18/21 8:19 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 15 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-6 E214202-04 Matrix:Groundwater Date Collected:10/13/21 15:18 Project: 22-0009, Holcomb Creosote Station ID:MW-6 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 2.1Acenaphthyleneug/L EPA 8270D4.2208-96-8 10/22/2114:5710/18/21 8:19 10Acetophenoneug/L EPA 8270D4.8 J, Q-298-86-2 10/22/2114:5710/18/21 8:19 2.1Anthraceneug/L EPA 8270D2.1 U120-12-7 10/22/2114:5710/18/21 8:19 10Atrazineug/L EPA 8270D10U, J, QL-1, QR-1, QC-1 1912-24-9 10/22/2114:5710/18/21 8:19 10Benzaldehydeug/L EPA 8270D10U100-52-7 10/22/2114:5710/18/21 8:19 2.1Benzo(a)anthracene ug/L EPA 8270D2.1 U56-55-3 10/22/2114:5710/18/21 8:19 2.1Benzo(a)pyrene ug/L EPA 8270D2.1 U50-32-8 10/22/2114:5710/18/21 8:19 2.1Benzo(b)fluoranthene ug/L EPA 8270D2.1 U205-99-2 10/22/2114:5710/18/21 8:19 2.1Benzo(g,h,i)perylene ug/L EPA 8270D2.1 U191-24-2 10/22/2114:5710/18/21 8:19 2.1Benzo(k)fluoranthene ug/L EPA 8270D2.1 U207-08-9 10/22/2114:5710/18/21 8:19 10Benzyl alcohol ug/L EPA 8270D10U100-51-6 10/22/2114:5710/18/21 8:19 10Benzyl butyl phthalate ug/L EPA 8270D10U85-68-7 10/22/2114:5710/18/21 8:19 10Bis(2-chloro-1-methylethyl) ether ug/L EPA 8270D10U108-60-1 10/22/2114:5710/18/21 8:19 210Bis(2-chloroethoxy)methane ug/L EPA 8270D210U111-91-1 10/25/2116:2110/18/21 8:19 10bis(2-Chloroethyl) Ether ug/L EPA 8270D10U111-44-4 10/22/2114:5710/18/21 8:19 10Bis(2-ethylhexyl) phthalate ug/L EPA 8270D10U117-81-7 10/22/2114:5710/18/21 8:19 210Caprolactamug/L EPA 8270D210U105-60-2 10/25/2116:2110/18/21 8:19 2.1Carbazoleug/L EPA 8270D1386-74-8 10/22/2114:5710/18/21 8:19 2.1Chryseneug/L EPA 8270D2.1 U218-01-9 10/22/2114:5710/18/21 8:19 2.1Dibenz(a,h)anthracene ug/L EPA 8270D2.1 U53-70-3 10/22/2114:5710/18/21 8:19 41Dibenzofuranug/L EPA 8270D220132-64-9 10/25/2116:2110/18/21 8:19 10Diethyl phthalate ug/L EPA 8270D10U84-66-2 10/22/2114:5710/18/21 8:19 10Dimethyl phthalate ug/L EPA 8270D10U131-11-3 10/22/2114:5710/18/21 8:19 10Di-n-butylphthalate ug/L EPA 8270D10U84-74-2 10/22/2114:5710/18/21 8:19 10Di-n-octylphthalate ug/L EPA 8270D10U117-84-0 10/22/2114:5710/18/21 8:19 2.1Fluorantheneug/L EPA 8270D7.4206-44-0 10/22/2114:5710/18/21 8:19 2.1Fluoreneug/L EPA 8270D56J, QL-286-73-7 10/22/2114:5710/18/21 8:19 10Hexachlorobenzene (HCB)ug/L EPA 8270D10U118-74-1 10/22/2114:5710/18/21 8:19 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 16 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Semi Volatile Organics Sample ID:Lab ID: MW-6 E214202-04 Matrix:Groundwater Date Collected:10/13/21 15:18 Project: 22-0009, Holcomb Creosote Station ID:MW-6 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 10Hexachlorocyclopentadiene (HCCP)ug/L EPA 8270D10U77-47-4 10/22/2114:5710/18/21 8:19 10Hexachloroethaneug/L EPA 8270D10U67-72-1 10/22/2114:5710/18/21 8:19 2.1Indeno (1,2,3-cd) pyrene ug/L EPA 8270D2.1 U193-39-5 10/22/2114:5710/18/21 8:19 210Isophoroneug/L EPA 8270D210U78-59-1 10/25/2116:2110/18/21 8:19 410Naphthaleneug/L EPA 8270D920091-20-3 10/25/2117:4510/18/21 8:19 210Nitrobenzeneug/L EPA 8270D210U98-95-3 10/25/2116:2110/18/21 8:19 10n-Nitroso di-n-Propylamine ug/L EPA 8270D10U621-64-7 10/22/2114:5710/18/21 8:19 10n-Nitrosodiphenylamine/Diphenylamine ug/L EPA 8270D10U122-39-4 10/22/2114:5710/18/21 8:19 10Pentachlorophenolug/L EPA 8270D10U87-86-5 10/22/2114:5710/18/21 8:19 2.1Phenanthreneug/L EPA 8270D5185-01-8 10/22/2114:5710/18/21 8:19 10Phenolug/L EPA 8270D10U108-95-2 10/22/2114:5710/18/21 8:19 2.1Pyreneug/L EPA 8270D2.1 U129-00-0 10/22/2114:5710/18/21 8:19 Tentatively Identified Compounds: EPA 8270Dug/L200Acenaphthylenone (TIC)NJR4-8001314 10/22/2114:5710/18/21 8:19 EPA 8270Dug/L30Anthracenedione (TIC)NJR4-6608 10/22/2114:5710/18/21 8:19 EPA 8270Dug/L30Dimethylnaphthalene (TIC)NJR4-6507 10/22/2114:5710/18/21 8:19 EPA 8270Dug/L200Fluorenone (TIC)NJR4-6621 10/22/2114:5710/18/21 8:19 EPA 8270Dug/L30Naphthalenecarbonitrile (TIC)NJR4-8000140 10/22/2114:5710/18/21 8:19 EPA 8270Dug/L20Naphthalic anhydride (TIC)NJR4-8000105 10/22/2114:5710/18/21 8:19 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 17 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2110040 - E 3520 LLE Blank (2110040-BLK1)Prepared: 10/18/21 Analyzed: 10/22/21 EPA 8270D (3-and/or 4-)Methylphenol ug/LU10 U 1,1-Biphenyl "U 2.0 U 1,4-Dioxane "U 2.0 U 1-Methylnaphthalene "U 2.0 U 2,3,4,6-Tetrachlorophenol "U 10 U 2,4,5-Trichlorophenol "U 10 U 2,4,6-Trichlorophenol "U 10 U 2,4-Dichlorophenol "U 10 U 2,4-Dimethylphenol "U 10 U 2,4-Dinitrophenol "U 20 U 2,4-Dinitrotoluene "U 10 U 2,6-Dinitrotoluene "U 10 U 2-Chloronaphthalene "U 10 U 2-Chlorophenol "U 10 U 2-Methyl-4,6-dinitrophenol "U 10 U 2-Methylnaphthalene "U 2.0 U 2-Methylphenol "U 10 U 2-Nitroaniline "U 10 U 2-Nitrophenol "U 10 U 3,3'-Dichlorobenzidine "U 10 U 3-Nitroaniline "U 10 U 4-Bromophenyl phenyl ether "U 10 U 4-Chloro-3-methylphenol "U 10 U 4-Chloroaniline "U 10 U 4-Chlorophenyl phenyl ether "U 10 U 4-Nitroaniline "U 10 U 4-Nitrophenol "U 10 U Acenaphthene "U 2.0 U Acenaphthylene "U 2.0 U Acetophenone "U 10 U Anthracene "U 2.0 U Atrazine "U 10 U Benzaldehyde "U 10 U Benzo(a)anthracene "U 2.0 U Benzo(a)pyrene "U 2.0 U Benzo(b)fluoranthene "U 2.0 U Benzo(g,h,i)perylene "U 2.0 U Benzo(k)fluoranthene "U 2.0 U Benzyl alcohol "U 10 U 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 18 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2110040 - E 3520 LLE Blank (2110040-BLK1)Prepared: 10/18/21 Analyzed: 10/22/21 Benzyl butyl phthalate ug/LU10 U Bis(2-chloro-1-methylethyl) ether "U 10 U Bis(2-chloroethoxy)methane "U 10 U bis(2-Chloroethyl) Ether "U 10 U Bis(2-ethylhexyl) phthalate "U 10 U Caprolactam "U 10 U Carbazole "U 2.0 U Chrysene "U 2.0 U Dibenz(a,h)anthracene "U 2.0 U Dibenzofuran "U 2.0 U Diethyl phthalate "U 10 U Dimethyl phthalate "U 10 U Di-n-butylphthalate "U 10 U Di-n-octylphthalate "U 10 U Fluoranthene "U 2.0 U Fluorene "U 2.0 U Hexachlorobenzene (HCB)"U 10 U Hexachlorocyclopentadiene (HCCP)"U 10 U Hexachloroethane "U 10 U Indeno (1,2,3-cd) pyrene "U 2.0 U Isophorone "U 10 U Naphthalene "U 2.0 U Nitrobenzene "U 10 U n-Nitroso di-n-Propylamine "U 10 U n-Nitrosodiphenylamine/Diphenylamine "U 10 U Pentachlorophenol "U 10 U Phenanthrene "U 2.0 U Phenol "U 10 U Pyrene "U 2.0 U Tentatively Identified Compounds "U 10 U 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 19 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2110040 - E 3520 LLE LCS (2110040-BS1)Prepared: 10/18/21 Analyzed: 10/22/21 EPA 8270D (3-and/or 4-)Methylphenol ug/L66.600 10 60.000 55-111111 1,1-Biphenyl "64.680 2.0 60.000 QC-251-118108 1,4-Dioxane "40.980 2.0 60.000 41-8968.3 1-Methylnaphthalene "84.510 2.0 60.000 QL-261-127141 2,3,4,6-Tetrachlorophenol "52.600 10 60.000 45-13487.7 2,4,5-Trichlorophenol "60.790 10 60.000 56-131101 2,4,6-Trichlorophenol "58.860 10 60.000 56-12898.1 2,4-Dichlorophenol "63.550 10 60.000 63-123106 2,4-Dimethylphenol "64.400 10 60.000 QL-244-106107 2,4-Dinitrophenol "122.94 20 120.00 49-128102 2,4-Dinitrotoluene "62.590 10 60.000 58-125104 2,6-Dinitrotoluene "62.590 10 60.000 60-122104 2-Chloronaphthalene "63.860 10 60.000 53-115106 2-Chlorophenol "57.300 10 60.000 55-11795.5 2-Methyl-4,6-dinitrophenol "59.090 10 60.000 62-12598.5 2-Methylnaphthalene "60.170 2.0 60.000 56-115100 2-Methylphenol "58.120 10 60.000 52-11196.9 2-Nitroaniline "63.440 10 60.000 58-121106 2-Nitrophenol "61.190 10 60.000 58-126102 3,3'-Dichlorobenzidine "46.810 10 60.000 10-14478.0 3-Nitroaniline "54.610 10 60.000 38-14191.0 4-Bromophenyl phenyl ether "61.450 10 60.000 61-117102 4-Chloro-3-methylphenol "64.620 10 60.000 64-122108 4-Chloroaniline "20.370 10 60.000 18-10234.0 4-Chlorophenyl phenyl ether "72.800 10 60.000 QL-255-117121 4-Nitroaniline "57.260 10 60.000 15-18595.4 4-Nitrophenol "55.820 10 60.000 38-13093.0 Acenaphthene "67.190 2.0 60.000 53-115112 Acenaphthylene "64.570 2.0 60.000 53-118108 Acetophenone "63.190 10 60.000 60-112105 Anthracene "62.060 2.0 60.000 65-110103 Atrazine "8.0000 10 60.000 QC-1, QL-1, J 53-12813.3 Benzaldehyde "54.220 10 60.000 55-15290.4 Benzo(a)anthracene "58.160 2.0 60.000 52-12196.9 Benzo(a)pyrene "59.190 2.0 60.000 60-11598.6 Benzo(b)fluoranthene "63.880 2.0 60.000 58-117106 Benzo(g,h,i)perylene "63.100 2.0 60.000 QL-245-101105 Benzo(k)fluoranthene "73.010 2.0 60.000 64-124122 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 20 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2110040 - E 3520 LLE LCS (2110040-BS1)Prepared: 10/18/21 Analyzed: 10/22/21 Benzyl alcohol ug/L52.490 10 60.000 49-11487.5 Benzyl butyl phthalate "54.700 10 60.000 58-12991.2 Bis(2-chloro-1-methylethyl) ether "59.900 10 60.000 55-11399.8 Bis(2-chloroethoxy)methane "63.180 10 60.000 59-115105 bis(2-Chloroethyl) Ether "59.820 10 60.000 53-11799.7 Bis(2-ethylhexyl) phthalate "59.850 10 60.000 56-13099.8 Caprolactam "41.660 10 60.000 33-9469.4 Carbazole "55.230 2.0 60.000 68-11492.0 Chrysene "63.810 2.0 60.000 58-122106 Dibenz(a,h)anthracene "73.970 2.0 60.000 QL-246-113123 Dibenzofuran "63.350 2.0 60.000 50-133106 Diethyl phthalate "66.280 10 60.000 61-118110 Dimethyl phthalate "65.720 10 60.000 58-120110 Di-n-butylphthalate "62.230 10 60.000 63-117104 Di-n-octylphthalate "56.700 10 60.000 60-12594.5 Fluoranthene "63.130 2.0 60.000 68-113105 Fluorene "69.930 2.0 60.000 60-117117 Hexachlorobenzene (HCB)"63.360 10 60.000 56-120106 Hexachlorocyclopentadiene (HCCP)"57.720 10 60.000 18-10396.2 Hexachloroethane "49.830 10 60.000 35-10583.0 Indeno (1,2,3-cd) pyrene "69.450 2.0 60.000 QL-247-110116 Isophorone "64.470 10 60.000 60-114107 Naphthalene "62.010 2.0 60.000 55-113103 Nitrobenzene "62.960 10 60.000 59-114105 n-Nitroso di-n-Propylamine "61.730 10 60.000 58-113103 n-Nitrosodiphenylamine/Diphenylamine "59.770 10 60.000 65-11599.6 Pentachlorophenol "53.140 10 60.000 47-12288.6 Phenanthrene "62.900 2.0 60.000 63-111105 Phenol "57.420 10 60.000 47-10495.7 Pyrene "52.890 2.0 60.000 48-12988.2 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 21 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2110040 - E 3520 LLE LCS Dup (2110040-BSD1)Prepared: 10/18/21 Analyzed: 10/22/21 EPA 8270D (3-and/or 4-)Methylphenol ug/L65.820 10 60.000 3055-111110 1.18 1,1-Biphenyl "65.350 2.0 60.000 18 QC-251-118109 1.03 1,4-Dioxane "39.050 2.0 60.000 5041-8965.1 4.82 1-Methylnaphthalene "84.140 2.0 60.000 21 QL-261-127140 0.439 2,3,4,6-Tetrachlorophenol "52.680 10 60.000 1245-13487.8 0.152 2,4,5-Trichlorophenol "60.930 10 60.000 1456-131102 0.230 2,4,6-Trichlorophenol "59.040 10 60.000 1656-12898.4 0.305 2,4-Dichlorophenol "62.190 10 60.000 2563-123104 2.16 2,4-Dimethylphenol "58.150 10 60.000 2744-10696.9 10.2 2,4-Dinitrophenol "123.52 20 120.00 1749-128103 0.471 2,4-Dinitrotoluene "63.130 10 60.000 1058-125105 0.859 2,6-Dinitrotoluene "63.130 10 60.000 1260-122105 0.859 2-Chloronaphthalene "65.070 10 60.000 1953-115108 1.88 2-Chlorophenol "57.930 10 60.000 3555-11796.6 1.09 2-Methyl-4,6-dinitrophenol "58.970 10 60.000 1262-12598.3 0.203 2-Methylnaphthalene "60.280 2.0 60.000 2256-115100 0.183 2-Methylphenol "59.220 10 60.000 3352-11198.7 1.87 2-Nitroaniline "63.820 10 60.000 1358-121106 0.597 2-Nitrophenol "60.150 10 60.000 2858-126100 1.71 3,3'-Dichlorobenzidine "47.940 10 60.000 5310-14479.9 2.39 3-Nitroaniline "54.600 10 60.000 1938-14191.0 0.0183 4-Bromophenyl phenyl ether "62.430 10 60.000 1261-117104 1.58 4-Chloro-3-methylphenol "63.260 10 60.000 1764-122105 2.13 4-Chloroaniline "21.820 10 60.000 4918-10236.4 6.87 4-Chlorophenyl phenyl ether "72.900 10 60.000 17 QL-255-117122 0.137 4-Nitroaniline "57.920 10 60.000 1915-18596.5 1.15 4-Nitrophenol "56.720 10 60.000 2338-13094.5 1.60 Acenaphthene "67.770 2.0 60.000 1453-115113 0.860 Acenaphthylene "64.840 2.0 60.000 1453-118108 0.417 Acetophenone "63.220 10 60.000 2760-112105 0.0475 Anthracene "62.760 2.0 60.000 1065-110105 1.12 Atrazine "8.0600 10 60.000 22 QC-1, QL-1, J 53-12813.4 0.747 Benzaldehyde "54.510 10 60.000 2855-15290.8 0.533 Benzo(a)anthracene "59.520 2.0 60.000 1052-12199.2 2.31 Benzo(a)pyrene "61.030 2.0 60.000 1060-115102 3.06 Benzo(b)fluoranthene "65.840 2.0 60.000 2258-117110 3.02 Benzo(g,h,i)perylene "64.100 2.0 60.000 20 QL-245-101107 1.57 Benzo(k)fluoranthene "75.640 2.0 60.000 19 QL-264-124126 3.54 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 22 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2110040 - E 3520 LLE LCS Dup (2110040-BSD1)Prepared: 10/18/21 Analyzed: 10/22/21 Benzyl alcohol ug/L52.640 10 60.000 3449-11487.7 0.285 Benzyl butyl phthalate "56.000 10 60.000 1058-12993.3 2.35 Bis(2-chloro-1-methylethyl) ether "60.400 10 60.000 2055-113101 0.831 Bis(2-chloroethoxy)methane "61.840 10 60.000 2559-115103 2.14 bis(2-Chloroethyl) Ether "61.220 10 60.000 2453-117102 2.31 Bis(2-ethylhexyl) phthalate "61.650 10 60.000 3956-130103 2.96 Caprolactam "42.900 10 60.000 3633-9471.5 2.93 Carbazole "55.140 2.0 60.000 1468-11491.9 0.163 Chrysene "65.200 2.0 60.000 1058-122109 2.15 Dibenz(a,h)anthracene "74.060 2.0 60.000 20 QL-246-113123 0.122 Dibenzofuran "64.160 2.0 60.000 1350-133107 1.27 Diethyl phthalate "66.260 10 60.000 1061-118110 0.0302 Dimethyl phthalate "65.340 10 60.000 1158-120109 0.580 Di-n-butylphthalate "63.410 10 60.000 1163-117106 1.88 Di-n-octylphthalate "57.630 10 60.000 1260-12596.0 1.63 Fluoranthene "64.500 2.0 60.000 1068-113108 2.15 Fluorene "70.720 2.0 60.000 12 QL-260-117118 1.12 Hexachlorobenzene (HCB)"65.380 10 60.000 1256-120109 3.14 Hexachlorocyclopentadiene (HCCP)"59.460 10 60.000 3218-10399.1 2.97 Hexachloroethane "49.730 10 60.000 4535-10582.9 0.201 Indeno (1,2,3-cd) pyrene "70.330 2.0 60.000 20 QL-247-110117 1.26 Isophorone "63.480 10 60.000 2060-114106 1.55 Naphthalene "61.020 2.0 60.000 2755-113102 1.61 Nitrobenzene "61.970 10 60.000 2959-114103 1.58 n-Nitroso di-n-Propylamine "63.040 10 60.000 2458-113105 2.10 n-Nitrosodiphenylamine/Diphenylamine "59.910 10 60.000 1065-11599.8 0.234 Pentachlorophenol "54.090 10 60.000 1147-12290.2 1.77 Phenanthrene "63.430 2.0 60.000 1063-111106 0.839 Phenol "57.800 10 60.000 3847-10496.3 0.660 Pyrene "53.390 2.0 60.000 1048-12989.0 0.941 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 23 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2110040 - E 3520 LLE Duplicate (2110040-DUP1)Prepared: 10/18/21 Analyzed: 10/22/21 Source: E214202-01 EPA 8270D (3-and/or 4-)Methylphenol ug/LU10 U 200 U 1,1-Biphenyl "99.580 2.0 95.886 200 QC-2, J3.78 1,4-Dioxane "U 2.0 U 200 U 2,3,4,6-Tetrachlorophenol "U 10 U 200 U 2,4,5-Trichlorophenol "U 10 U 200 U 2,4,6-Trichlorophenol "U 10 U 200 U 2,4-Dichlorophenol "U 10 U 200 U 2,4-Dimethylphenol "U 10 U 200 U 2,4-Dinitrophenol "U 20 U 200 U 2,4-Dinitrotoluene "U 10 U 200 U 2,6-Dinitrotoluene "U 10 U 200 U 2-Chloronaphthalene "U 10 U 200 U 2-Chlorophenol "U 10 U 200 U 2-Methyl-4,6-dinitrophenol "U 10 U 200 U 2-Methylphenol "U 10 U 200 U 2-Nitroaniline "U 10 U 200 U 2-Nitrophenol "U 10 U 200 U 3,3'-Dichlorobenzidine "U 10 U 200 U 3-Nitroaniline "U 10 U 200 U 4-Bromophenyl phenyl ether "U 10 U 200 U 4-Chloro-3-methylphenol "U 10 U 200 U 4-Chloroaniline "U 10 U 200 U 4-Chlorophenyl phenyl ether "U 10 U 200 U 4-Nitroaniline "U 10 U 200 U 4-Nitrophenol "U 10 U 200 U Acenaphthylene "U 2.0 U 200 U Acetophenone "U 10 U 200 U Anthracene "4.4400 2.0 3.8549 20014.1 Atrazine "U 10 U 200 QL-1, QR-1, J, QC-1, U Benzaldehyde "U 10 U 200 U Benzo(a)anthracene "U 2.0 U 200 U Benzo(a)pyrene "U 2.0 U 200 U Benzo(b)fluoranthene "U 2.0 U 200 U Benzo(g,h,i)perylene "U 2.0 U 200 U Benzo(k)fluoranthene "U 2.0 U 200 U Benzyl alcohol "U 10 U 200 U Benzyl butyl phthalate "U 10 U 200 U Bis(2-chloro-1-methylethyl) ether "U 10 U 200 U 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 24 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2110040 - E 3520 LLE Duplicate (2110040-DUP1)Prepared: 10/18/21 Analyzed: 10/22/21 Source: E214202-01 Bis(2-chloroethoxy)methane ug/LU10 U 200 U bis(2-Chloroethyl) Ether "U 10 U 200 U Bis(2-ethylhexyl) phthalate "U 10 U 200 U Caprolactam "U 10 U 200 U Chrysene "U 2.0 U 200 U Dibenz(a,h)anthracene "U 2.0 U 200 U Diethyl phthalate "U 10 U 200 U Dimethyl phthalate "U 10 U 200 U Di-n-butylphthalate "U 10 U 200 U Di-n-octylphthalate "U 10 U 200 U Fluoranthene "11.860 2.0 11.503 2003.06 Hexachlorobenzene (HCB)"U 10 U 200 U Hexachlorocyclopentadiene (HCCP)"U 10 U 200 U Hexachloroethane "U 10 U 200 U Indeno (1,2,3-cd) pyrene "U 2.0 U 200 U Isophorone "U 10 U 200 U Nitrobenzene "U 10 U 200 U n-Nitroso di-n-Propylamine "U 10 U 200 U n-Nitrosodiphenylamine/Diphenylamine "U 10 U 200 U Pentachlorophenol "U 10 U 200 U Phenol "U 10 U 200 U Pyrene "5.3800 2.0 5.3886 2000.160 Tentatively Identified Compounds "U 10 U 200 U Duplicate (2110040-DUP2)Prepared: 10/18/21 Analyzed: 10/25/21 Source: E214202-01RE1 EPA 8270D 1-Methylnaphthalene ug/L556.00 40 537.41 200 QL-2, J3.40 2-Methylnaphthalene "1058.2 40 1012.0 2004.46 Acenaphthene "587.60 40 590.88 2000.557 Carbazole "147.00 40 153.16 2004.10 Dibenzofuran "283.60 40 283.73 2000.0460 Fluorene "193.80 40 190.05 200 J, QL-21.95 Phenanthrene "229.40 40 221.35 2003.57 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 25 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2110040 - E 3520 LLE Duplicate (2110040-DUP3)Prepared: 10/18/21 Analyzed: 10/22/21 Source: E214202-01RE2 EPA 8270D Naphthalene ug/L4231.0 200 2752.3 20042.3 MRL Verification (2110040-PS1)Prepared: 10/18/21 Analyzed: 10/22/21 EPA 8270D (3-and/or 4-)Methylphenol ug/L7.7600 10 10.000 MRL-2, J48-10577.6 1,1-Biphenyl "1.4000 2.0 2.0000 QC-2, MRL-2, J 50-10470.0 1,4-Dioxane "0.92000 2.0 2.0000 MRL-2, J14-11046.0 1-Methylnaphthalene "1.7600 2.0 2.0000 MRL-2, J56-11788.0 2,3,4,6-Tetrachlorophenol "7.1500 10 10.000 MRL-2, J31-11171.5 2,4,5-Trichlorophenol "7.1500 10 10.000 MRL-2, J42-11571.5 2,4,6-Trichlorophenol "6.9700 10 10.000 MRL-2, J47-11069.7 2,4-Dichlorophenol "7.6300 10 10.000 MRL-2, J49-11676.3 2,4-Dimethylphenol "9.6600 10 10.000 MRL-2, J16-11196.6 2,4-Dinitrophenol "18.690 20 20.000 MRL-2, J10-12493.4 2,4-Dinitrotoluene "8.2900 10 10.000 MRL-2, J53-10882.9 2,6-Dinitrotoluene "8.2900 10 10.000 MRL-2, J55-10682.9 2-Chloronaphthalene "7.1500 10 10.000 MRL-2, J51-10471.5 2-Chlorophenol "7.5500 10 10.000 MRL-2, J46-11175.5 2-Methyl-4,6-dinitrophenol "8.7600 10 10.000 MRL-2, J26-11687.6 2-Methylnaphthalene "1.3500 2.0 2.0000 MRL-2, J51-10667.5 2-Methylphenol "7.3700 10 10.000 MRL-2, J42-10873.7 2-Nitroaniline "8.0300 10 10.000 MRL-2, J48-10980.3 2-Nitrophenol "7.5400 10 10.000 MRL-2, J46-12075.4 3,3'-Dichlorobenzidine "5.0400 10 10.000 MRL-2, J10-10350.4 3-Nitroaniline "7.0500 10 10.000 MRL-2, J28-11870.5 4-Bromophenyl phenyl ether "7.1500 10 10.000 MRL-2, J58-10671.5 4-Chloro-3-methylphenol "7.6000 10 10.000 MRL-2, J49-11876.0 4-Chloroaniline "2.4800 10 10.000 MRL-2, J20-8524.8 4-Chlorophenyl phenyl ether "7.4200 10 10.000 MRL-2, J49-10274.2 4-Nitroaniline "7.7600 10 10.000 MRL-2, J10-16577.6 4-Nitrophenol "6.6500 10 10.000 MRL-2, J11-11666.5 Acenaphthene "1.4000 2.0 2.0000 MRL-2, J51-10070.0 Acenaphthylene "1.4600 2.0 2.0000 MRL-2, J52-10473.0 Acetophenone "7.3300 10 10.000 MRL-2, J56-10873.3 Anthracene "1.4700 2.0 2.0000 MRL-2, J48-10873.5 Atrazine "1.1200 10 10.000 QC-1, MRL-2, QR-1, J 46-12611.2 Benzaldehyde "7.9700 10 10.000 MRL-2, J40-16979.7 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 26 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Semi Volatile Organics (SVOA) - Quality Control US-EPA, Region 4, LSASD Batch 2110040 - E 3520 LLE MRL Verification (2110040-PS1)Prepared: 10/18/21 Analyzed: 10/22/21 Benzo(a)anthracene ug/L1.4400 2.0 2.0000 MRL-2, J52-11772.0 Benzo(a)pyrene "1.5200 2.0 2.0000 MRL-2, J48-11676.0 Benzo(b)fluoranthene "1.4200 2.0 2.0000 MRL-2, J31-14271.0 Benzo(g,h,i)perylene "1.8400 2.0 2.0000 MRL-2, J37-11592.0 Benzo(k)fluoranthene "1.6500 2.0 2.0000 MRL-2, J29-14582.5 Benzyl alcohol "5.8500 10 10.000 MRL-2, J12-13358.5 Benzyl butyl phthalate "7.5100 10 10.000 MRL-2, J60-13675.1 Bis(2-chloro-1-methylethyl) ether "7.5800 10 10.000 MRL-2, J48-10775.8 Bis(2-chloroethoxy)methane "7.6100 10 10.000 MRL-2, J53-10776.1 bis(2-Chloroethyl) Ether "7.5000 10 10.000 MRL-2, J47-10475.0 Bis(2-ethylhexyl) phthalate "6.4600 10 10.000 MRL-2, J19-17964.6 Caprolactam "6.8200 10 10.000 MRL-2, J32-8768.2 Carbazole "1.3500 2.0 2.0000 MRL-2, J67-11967.5 Chrysene "1.3800 2.0 2.0000 MRL-2, J55-11669.0 Dibenz(a,h)anthracene "1.8100 2.0 2.0000 MRL-2, J33-11890.5 Dibenzofuran "1.4600 2.0 2.0000 MRL-2, J53-11373.0 Diethyl phthalate "8.2900 10 10.000 MRL-2, J53-12982.9 Dimethyl phthalate "8.2800 10 10.000 MRL-2, J59-10782.8 Di-n-butylphthalate "8.6900 10 10.000 MRL-2, J69-13986.9 Di-n-octylphthalate "7.5000 10 10.000 MRL-2, J62-12975.0 Fluoranthene "1.4800 2.0 2.0000 MRL-2, J60-11274.0 Fluorene "1.3800 2.0 2.0000 MRL-2, J55-10169.0 Hexachlorobenzene (HCB)"7.2900 10 10.000 MRL-2, J50-10572.9 Hexachlorocyclopentadiene (HCCP)"11.010 10 10.000 MRL-2, QR-2 10-85110 Hexachloroethane "6.1200 10 10.000 MRL-2, J26-8961.2 Indeno (1,2,3-cd) pyrene "1.7300 2.0 2.0000 MRL-2, J37-11486.5 Isophorone "8.2500 10 10.000 MRL-2, J54-10882.5 Naphthalene "1.4900 2.0 2.0000 MRL-2, J38-13774.5 Nitrobenzene "7.8700 10 10.000 MRL-2, J54-11078.7 n-Nitroso di-n-Propylamine "7.9800 10 10.000 MRL-2, J49-10679.8 n-Nitrosodiphenylamine/Diphenylamine "7.0500 10 10.000 MRL-2, J55-10770.5 Pentachlorophenol "7.4200 10 10.000 MRL-2, J20-13674.2 Phenanthrene "1.5000 2.0 2.0000 MRL-2, J55-11575.0 Phenol "7.9700 10 10.000 MRL-2, J44-9779.7 Pyrene "1.4200 2.0 2.0000 MRL-2, J51-12271.0 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 27 of 28 D.A.R.T. Id: 22-0009 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0009, Holcomb Creosote - Reported by Stacie Masters Notes and Definitions for QC Samples U The analyte was not detected at or above the reporting limit. J The identification of the analyte is acceptable; the reported value is an estimate. MRL-2 MRL verification for Non-Potable Water matrix QC-1 Analyte concentration low in continuing calibration verification standard QC-2 Analyte concentration high in continuing calibration verification standard QL-1 Laboratory Control Spike Recovery less than method control limits QL-2 Laboratory Control Spike Recovery greater than method control limits QR-1 MRL verification recovery less than lower control limits. QR-2 MRL verification recovery greater than upper control limits. 11/9/21 16:41E214202 SVOA FINAL 11 09 21 1641Page 28 of 28 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Denise Goddard January 27, 2022 MEMORANDUM SUBJECT: FROM: FINAL Analytical Report Project: 22-0052, Holcomb Creosote 4LSASD-QAPSB Denise Goddard Quality Assurance Section, Chemist Quality Assurance Section Floyd Wellborn, ChiefTHRU: TO:Joydeb Majumder Attached are the final results for the analytical groups listed below. These analyses were performed in accordance with the associated contract Statement Of Work (SOW). In general, project data quality objectives have not been used to evaluate these data prior to release by the Quality Assurance Section. For a listing of specific data qualifiers and explanations, please refer to the Data Qualifier Definitions included in this report. Analyses Included in this report:Method Used: Dissolved Metals (DMTL) Dissolved Metals Contract SOW (Water) Total Metals (TMTL) Total Metals CLP Inorganics (Water) 1/27/22 14:19C215303 DMTL TMTL FINAL 01 27 22 1419Page 1 of 12 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Denise Goddard Report Narrative for Work Order: C215303 Analysis: DMTL Inorganic Data Review and Validation Report Site Name: Holcomb Creosote, Yadkinville, NC Case No.: 49842, Project No.: 22-0052, Work Order Nos.: C215302(PES), C215303 ELEMENT Sample IDs.: C215302-01-02 (PES), C215303-01-08 Sampling Date(s): 12/7/21 Validated Time of Sample Receipt: 12/9/21 Laboratory Performing Inorganic Analyses: Chemtech Consulting Group, Mountainside, NJ Date Received from Lab: 12/29/21 (SMO portal) Analyses conducted: Total Metals and Dissolved Metals (ICP-AES) This report is being re-issued to combine the total metals and dissolved metals data into one report instead of producing two separate reports. The ESAT Work Team has reviewed the above-captioned CLP data package consisting of 10 water samples for total and/or dissolved metals by ICP-AES analyses according to the contract Statement of Work SFAM01.1 (SOW) and EPA guidelines. This package presents acceptable contractual and technical performance with qualifications. Additonal details are provided below. Examination of laboratory blanks revealed apparent low-level contamination with several metals. Reported detection limits were adjusted as high as ten times the blank levels to discount possible false positives due to contamination in laboratory blanks. ICP-AES Analysis PE Sample Results The PES recoveries for total metals were scored as within limits by the web-based SPS Web software except for selenium which was scored warning low in one PES only. All selenium results were considered estimated and “J” qualified. Other QA/QC Results Arsenic was reported as 13 ug/L in the original analysis of sample C215303-07 but as not detected at the CRQL (Contract Required Quantitation Limit) of 10 ug/L in the duplicate analysis performed. The arsenic result for sample C215303-07 is considered estimated and “J” qualified. A Stage 4 validation consisting of manual review was performed on the inorganic samples submitted for this case. cc: Nardina Turner 1/27/22 14:19C215303 DMTL TMTL FINAL 01 27 22 1419Page 2 of 12 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Denise Goddard Date CollectedMatrixLaboratory IDSample ID SAMPLES INCLUDED IN THIS REPORT Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 MD#D# BLT0BLT0MW-2 C215303-01 Groundwater 12/7/21 16:37 BLT4BLT4MW-2_Dis C215303-02 Groundwater 12/7/21 16:37 BLT1BLT1MW-57 C215303-03 Groundwater 12/7/21 15:22 BLT5BLT5MW-57_Dis C215303-04 Groundwater 12/7/21 15:22 BLT2BLT2MW-58 C215303-05 Groundwater 12/7/21 16:26 BLT6BLT6MW-58_Dis C215303-06 Groundwater 12/7/21 16:26 BLT3BLT3MW-6 C215303-07 Groundwater 12/7/21 14:18 BLT7BLT7MW-6_Dis C215303-08 Groundwater 12/7/21 14:18 1/27/22 14:19C215303 DMTL TMTL FINAL 01 27 22 1419Page 3 of 12 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Denise Goddard DATA QUALIFIER DEFINITIONS U The analyte was not detected at or above the reporting limit. B-4 Level in blank impacts MRLs. CLP25 PE sample recovery scored as warning-low. CLP36 Identification/Concentration of analyte not confirmed by ICP-MS. J The identification of the analyte is acceptable; the reported value is an estimate. Q-2 Result greater than MDL but less than MRL. QM-4 Matrix Precision outside method control limits ACRONYMS AND ABBREVIATIONS CAS Chemical Abstracts Service Note: Analytes with no known CAS identifiers have been assigned codes beginning with "E", the EPA ID as assigned by the EPA Substance Registry System (www.epa.gov/srs), or beginning with "R4-", a unique identifier assigned by the EPA Region 4 laboratory. MDL Method Detection Limit - The minimum concentration of a substance (an analyte) that can be measured and reported with a 99% confidence that the analyte concentration is greater than zero. MRL Minimum Reporting Limit - Analyte concentration that corresponds to the lowest demonstrated level of acceptable quantitation. The MRL is sample-specific and accounts for preparation weights and volumes, dilutions, and moisture content of soil/sediments. TIC Tentatively Identified Compound - An analyte identified based on a match with the instrument software's mass spectral library. A calibration standard has not been analyzed to confirm the compound's identification or the estimated concentration reported. 1/27/22 14:19C215303 DMTL TMTL FINAL 01 27 22 1419Page 4 of 12 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Denise Goddard Total Metals Sample ID:Lab ID: MW-2 C215303-01 Matrix:Groundwater Date Collected:12/7/21 16:37 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT0 CHM MD No: BLT0 CHM Station ID:MW-2 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/13/21Aluminumug/L 12/23/21 CLP SFAM01.1 P140J, Q-27429-90-5 60 12/13/21Antimonyug/L 12/23/21 CLP SFAM01.1 P60U7440-36-0 10 12/13/21Arsenicug/L 12/23/21 CLP SFAM01.1 P7.2 J, CLP36, Q-27440-38-2 200 12/13/21Bariumug/L 12/23/21 CLP SFAM01.1 P160J, Q-27440-39-3 5.0 12/13/21Berylliumug/L 12/23/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/13/21Cadmiumug/L 12/23/21 CLP SFAM01.1 P5.0 U7440-43-9 5000 12/13/21Calciumug/L 12/23/21 CLP SFAM01.1 P310007440-70-2 10 12/13/21Chromiumug/L 12/23/21 CLP SFAM01.1 P9.5 J, Q-27440-47-3 50 12/13/21Cobaltug/L 12/23/21 CLP SFAM01.1 P17J, Q-27440-48-4 25 12/13/21Copperug/L 12/23/21 CLP SFAM01.1 P2.8 J, Q-27440-50-8 100 12/13/21Ironug/L 12/23/21 CLP SFAM01.1 P160007439-89-6 10 12/13/21Leadug/L 12/23/21 CLP SFAM01.1 P147439-92-1 5000 12/13/21Magnesiumug/L 12/23/21 CLP SFAM01.1 P91007439-95-4 15 12/13/21Manganeseug/L 12/23/21 CLP SFAM01.1 P160007439-96-5 40 12/13/21Nickelug/L 12/23/21 CLP SFAM01.1 P8.8 J, Q-27440-02-0 5000 12/13/21Potassiumug/L 12/23/21 CLP SFAM01.1 P3200J, Q-27440-09-7 35 12/13/21Seleniumug/L 12/23/21 CLP SFAM01.1 P35U, J, CLP257782-49-2 10 12/13/21Silverug/L 12/23/21 CLP SFAM01.1 P10U7440-22-4 5000 12/13/21Sodiumug/L 12/23/21 CLP SFAM01.1 P190007440-23-5 25 12/13/21Thalliumug/L 12/23/21 CLP SFAM01.1 P25U7440-28-0 50 12/13/21Vanadiumug/L 12/23/21 CLP SFAM01.1 P14J, Q-27440-62-2 60 12/13/21Zincug/L 12/23/21 CLP SFAM01.1 P627440-66-6 1/27/22 14:19C215303 DMTL TMTL FINAL 01 27 22 1419Page 5 of 12 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Denise Goddard Dissolved Metals Sample ID:Lab ID: MW-2_Dis C215303-02 Matrix:Groundwater Date Collected:12/7/21 16:37 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT4 CHM MD No: BLT4 CHM Station ID:MW-2 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/13/21Aluminumug/L 12/20/21 CLP SFAM01.1 P200U7429-90-5 60 12/13/21Antimonyug/L 12/20/21 CLP SFAM01.1 P60U7440-36-0 10 12/13/21Arsenicug/L 12/20/21 CLP SFAM01.1 P10U7440-38-2 200 12/13/21Bariumug/L 12/20/21 CLP SFAM01.1 P50J, Q-27440-39-3 5.0 12/13/21Berylliumug/L 12/20/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/13/21Cadmiumug/L 12/20/21 CLP SFAM01.1 P5.0 U7440-43-9 5000 12/13/21Calciumug/L 12/20/21 CLP SFAM01.1 P310007440-70-2 10 12/13/21Chromiumug/L 12/20/21 CLP SFAM01.1 P107440-47-3 50 12/13/21Cobaltug/L 12/20/21 CLP SFAM01.1 P50U7440-48-4 25 12/13/21Copperug/L 12/20/21 CLP SFAM01.1 P25U7440-50-8 100 12/13/21Ironug/L 12/20/21 CLP SFAM01.1 P100U7439-89-6 10 12/13/21Leadug/L 12/20/21 CLP SFAM01.1 P12U, B-47439-92-1 5000 12/13/21Magnesiumug/L 12/20/21 CLP SFAM01.1 P94007439-95-4 15 12/13/21Manganeseug/L 12/20/21 CLP SFAM01.1 P130007439-96-5 40 12/13/21Nickelug/L 12/20/21 CLP SFAM01.1 P5.1 J, Q-27440-02-0 5000 12/13/21Potassiumug/L 12/20/21 CLP SFAM01.1 P3000J, Q-27440-09-7 35 12/13/21Seleniumug/L 12/20/21 CLP SFAM01.1 P14J, CLP36, Q-27782-49-2 10 12/13/21Silverug/L 12/20/21 CLP SFAM01.1 P10U7440-22-4 5000 12/13/21Sodiumug/L 12/20/21 CLP SFAM01.1 P190007440-23-5 25 12/13/21Thalliumug/L 12/20/21 CLP SFAM01.1 P25U7440-28-0 50 12/13/21Vanadiumug/L 12/20/21 CLP SFAM01.1 P13J, Q-27440-62-2 60 12/13/21Zincug/L 12/20/21 CLP SFAM01.1 P60U7440-66-6 1/27/22 14:19C215303 DMTL TMTL FINAL 01 27 22 1419Page 6 of 12 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Denise Goddard Total Metals Sample ID:Lab ID: MW-57 C215303-03 Matrix:Groundwater Date Collected:12/7/21 15:22 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT1 CHM MD No: BLT1 CHM Station ID:MW-57 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/13/21Aluminumug/L 12/23/21 CLP SFAM01.1 P51J, Q-27429-90-5 60 12/13/21Antimonyug/L 12/23/21 CLP SFAM01.1 P60U7440-36-0 10 12/13/21Arsenicug/L 12/23/21 CLP SFAM01.1 P16CLP367440-38-2 200 12/13/21Bariumug/L 12/23/21 CLP SFAM01.1 P82J, Q-27440-39-3 5.0 12/13/21Berylliumug/L 12/23/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/13/21Cadmiumug/L 12/23/21 CLP SFAM01.1 P5.0 U7440-43-9 5000 12/13/21Calciumug/L 12/23/21 CLP SFAM01.1 P750007440-70-2 10 12/13/21Chromiumug/L 12/23/21 CLP SFAM01.1 P1307440-47-3 50 12/13/21Cobaltug/L 12/23/21 CLP SFAM01.1 P50U7440-48-4 25 12/13/21Copperug/L 12/23/21 CLP SFAM01.1 P25U7440-50-8 100 12/13/21Ironug/L 12/23/21 CLP SFAM01.1 P100U7439-89-6 10 12/13/21Leadug/L 12/23/21 CLP SFAM01.1 P127439-92-1 5000 12/13/21Magnesiumug/L 12/23/21 CLP SFAM01.1 P210007439-95-4 15 12/13/21Manganeseug/L 12/23/21 CLP SFAM01.1 P150007439-96-5 40 12/13/21Nickelug/L 12/23/21 CLP SFAM01.1 P1.9 J, Q-27440-02-0 5000 12/13/21Potassiumug/L 12/23/21 CLP SFAM01.1 P50007440-09-7 35 12/13/21Seleniumug/L 12/23/21 CLP SFAM01.1 P35U, J, CLP257782-49-2 10 12/13/21Silverug/L 12/23/21 CLP SFAM01.1 P10U7440-22-4 5000 12/13/21Sodiumug/L 12/23/21 CLP SFAM01.1 P1300007440-23-5 25 12/13/21Thalliumug/L 12/23/21 CLP SFAM01.1 P25U7440-28-0 50 12/13/21Vanadiumug/L 12/23/21 CLP SFAM01.1 P11J, Q-27440-62-2 60 12/13/21Zincug/L 12/23/21 CLP SFAM01.1 P647440-66-6 1/27/22 14:19C215303 DMTL TMTL FINAL 01 27 22 1419Page 7 of 12 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Denise Goddard Dissolved Metals Sample ID:Lab ID: MW-57_Dis C215303-04 Matrix:Groundwater Date Collected:12/7/21 15:22 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT5 CHM MD No: BLT5 CHM Station ID:MW-57 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/13/21Aluminumug/L 12/20/21 CLP SFAM01.1 P19J, Q-27429-90-5 60 12/13/21Antimonyug/L 12/20/21 CLP SFAM01.1 P60U7440-36-0 10 12/13/21Arsenicug/L 12/20/21 CLP SFAM01.1 P10U7440-38-2 200 12/13/21Bariumug/L 12/20/21 CLP SFAM01.1 P39J, Q-27440-39-3 5.0 12/13/21Berylliumug/L 12/20/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/13/21Cadmiumug/L 12/20/21 CLP SFAM01.1 P5.0 U7440-43-9 5000 12/13/21Calciumug/L 12/20/21 CLP SFAM01.1 P820007440-70-2 10 12/13/21Chromiumug/L 12/20/21 CLP SFAM01.1 P1507440-47-3 50 12/13/21Cobaltug/L 12/20/21 CLP SFAM01.1 P50U7440-48-4 25 12/13/21Copperug/L 12/20/21 CLP SFAM01.1 P25U7440-50-8 100 12/13/21Ironug/L 12/20/21 CLP SFAM01.1 P100U7439-89-6 10 12/13/21Leadug/L 12/20/21 CLP SFAM01.1 P12U, B-47439-92-1 5000 12/13/21Magnesiumug/L 12/20/21 CLP SFAM01.1 P230007439-95-4 15 12/13/21Manganeseug/L 12/20/21 CLP SFAM01.1 P7507439-96-5 40 12/13/21Nickelug/L 12/20/21 CLP SFAM01.1 P40U7440-02-0 5000 12/13/21Potassiumug/L 12/20/21 CLP SFAM01.1 P4900J, Q-27440-09-7 35 12/13/21Seleniumug/L 12/20/21 CLP SFAM01.1 P35U, J, CLP257782-49-2 10 12/13/21Silverug/L 12/20/21 CLP SFAM01.1 P10U7440-22-4 5000 12/13/21Sodiumug/L 12/20/21 CLP SFAM01.1 P1300007440-23-5 25 12/13/21Thalliumug/L 12/20/21 CLP SFAM01.1 P25U7440-28-0 50 12/13/21Vanadiumug/L 12/20/21 CLP SFAM01.1 P50U7440-62-2 60 12/13/21Zincug/L 12/20/21 CLP SFAM01.1 P17J, Q-27440-66-6 1/27/22 14:19C215303 DMTL TMTL FINAL 01 27 22 1419Page 8 of 12 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Denise Goddard Total Metals Sample ID:Lab ID: MW-58 C215303-05 Matrix:Groundwater Date Collected:12/7/21 16:26 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT2 CHM MD No: BLT2 CHM Station ID:MW-58 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/13/21Aluminumug/L 12/23/21 CLP SFAM01.1 P4407429-90-5 60 12/13/21Antimonyug/L 12/23/21 CLP SFAM01.1 P60U7440-36-0 10 12/13/21Arsenicug/L 12/23/21 CLP SFAM01.1 P10U7440-38-2 200 12/13/21Bariumug/L 12/23/21 CLP SFAM01.1 P15007440-39-3 5.0 12/13/21Berylliumug/L 12/23/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/13/21Cadmiumug/L 12/23/21 CLP SFAM01.1 P5.0 U7440-43-9 5000 12/13/21Calciumug/L 12/23/21 CLP SFAM01.1 P110007440-70-2 10 12/13/21Chromiumug/L 12/23/21 CLP SFAM01.1 P157440-47-3 50 12/13/21Cobaltug/L 12/23/21 CLP SFAM01.1 P10J, Q-27440-48-4 25 12/13/21Copperug/L 12/23/21 CLP SFAM01.1 P25U7440-50-8 100 12/13/21Ironug/L 12/23/21 CLP SFAM01.1 P46007439-89-6 10 12/13/21Leadug/L 12/23/21 CLP SFAM01.1 P197439-92-1 5000 12/13/21Magnesiumug/L 12/23/21 CLP SFAM01.1 P2000J, Q-27439-95-4 45 12/13/21Manganeseug/L 12/26/21 CLP SFAM01.1 P330007439-96-5 40 12/13/21Nickelug/L 12/23/21 CLP SFAM01.1 P6.3 J, Q-27440-02-0 5000 12/13/21Potassiumug/L 12/23/21 CLP SFAM01.1 P1600J, Q-27440-09-7 35 12/13/21Seleniumug/L 12/23/21 CLP SFAM01.1 P35U, J, CLP257782-49-2 10 12/13/21Silverug/L 12/23/21 CLP SFAM01.1 P10U7440-22-4 5000 12/13/21Sodiumug/L 12/23/21 CLP SFAM01.1 P180007440-23-5 25 12/13/21Thalliumug/L 12/23/21 CLP SFAM01.1 P25U7440-28-0 50 12/13/21Vanadiumug/L 12/23/21 CLP SFAM01.1 P29J, Q-27440-62-2 60 12/13/21Zincug/L 12/23/21 CLP SFAM01.1 P13J, Q-27440-66-6 1/27/22 14:19C215303 DMTL TMTL FINAL 01 27 22 1419Page 9 of 12 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Denise Goddard Dissolved Metals Sample ID:Lab ID: MW-58_Dis C215303-06 Matrix:Groundwater Date Collected:12/7/21 16:26 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT6 CHM MD No: BLT6 CHM Station ID:MW-58 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/13/21Aluminumug/L 12/20/21 CLP SFAM01.1 P200U7429-90-5 60 12/13/21Antimonyug/L 12/20/21 CLP SFAM01.1 P60U7440-36-0 10 12/13/21Arsenicug/L 12/20/21 CLP SFAM01.1 P10U7440-38-2 200 12/13/21Bariumug/L 12/20/21 CLP SFAM01.1 P32J, Q-27440-39-3 5.0 12/13/21Berylliumug/L 12/20/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/13/21Cadmiumug/L 12/20/21 CLP SFAM01.1 P5.0 U7440-43-9 5000 12/13/21Calciumug/L 12/20/21 CLP SFAM01.1 P68007440-70-2 10 12/13/21Chromiumug/L 12/20/21 CLP SFAM01.1 P8.9 J, Q-27440-47-3 50 12/13/21Cobaltug/L 12/20/21 CLP SFAM01.1 P50U7440-48-4 25 12/13/21Copperug/L 12/20/21 CLP SFAM01.1 P25U7440-50-8 100 12/13/21Ironug/L 12/20/21 CLP SFAM01.1 P100U7439-89-6 10 12/13/21Leadug/L 12/20/21 CLP SFAM01.1 P16U, B-47439-92-1 5000 12/13/21Magnesiumug/L 12/20/21 CLP SFAM01.1 P1700J, Q-27439-95-4 15 12/13/21Manganeseug/L 12/20/21 CLP SFAM01.1 P4407439-96-5 40 12/13/21Nickelug/L 12/20/21 CLP SFAM01.1 P40U7440-02-0 5000 12/13/21Potassiumug/L 12/20/21 CLP SFAM01.1 P1100J, Q-27440-09-7 35 12/13/21Seleniumug/L 12/20/21 CLP SFAM01.1 P35U, J, CLP257782-49-2 10 12/13/21Silverug/L 12/20/21 CLP SFAM01.1 P10U7440-22-4 5000 12/13/21Sodiumug/L 12/20/21 CLP SFAM01.1 P170007440-23-5 25 12/13/21Thalliumug/L 12/20/21 CLP SFAM01.1 P25U7440-28-0 50 12/13/21Vanadiumug/L 12/20/21 CLP SFAM01.1 P50U7440-62-2 60 12/13/21Zincug/L 12/20/21 CLP SFAM01.1 P60U7440-66-6 1/27/22 14:19C215303 DMTL TMTL FINAL 01 27 22 1419Page 10 of 12 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Denise Goddard Total Metals Sample ID:Lab ID: MW-6 C215303-07 Matrix:Groundwater Date Collected:12/7/21 14:18 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT3 CHM MD No: BLT3 CHM Station ID:MW-6 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/13/21Aluminumug/L 12/23/21 CLP SFAM01.1 P25J, Q-27429-90-5 60 12/13/21Antimonyug/L 12/23/21 CLP SFAM01.1 P60U7440-36-0 10 12/13/21Arsenicug/L 12/23/21 CLP SFAM01.1 P13J, CLP36, QM-47440-38-2 200 12/13/21Bariumug/L 12/23/21 CLP SFAM01.1 P89J, Q-27440-39-3 5.0 12/13/21Berylliumug/L 12/23/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/13/21Cadmiumug/L 12/23/21 CLP SFAM01.1 P5.0 U7440-43-9 5000 12/13/21Calciumug/L 12/23/21 CLP SFAM01.1 P1500J, Q-27440-70-2 10 12/13/21Chromiumug/L 12/23/21 CLP SFAM01.1 P647440-47-3 50 12/13/21Cobaltug/L 12/23/21 CLP SFAM01.1 P6.9 J, Q-27440-48-4 25 12/13/21Copperug/L 12/23/21 CLP SFAM01.1 P9.7 J, Q-27440-50-8 100 12/13/21Ironug/L 12/23/21 CLP SFAM01.1 P36007439-89-6 10 12/13/21Leadug/L 12/23/21 CLP SFAM01.1 P117439-92-1 5000 12/13/21Magnesiumug/L 12/23/21 CLP SFAM01.1 P600J, Q-27439-95-4 15 12/13/21Manganeseug/L 12/23/21 CLP SFAM01.1 P24007439-96-5 40 12/13/21Nickelug/L 12/23/21 CLP SFAM01.1 P757440-02-0 5000 12/13/21Potassiumug/L 12/23/21 CLP SFAM01.1 P690J, Q-27440-09-7 35 12/13/21Seleniumug/L 12/23/21 CLP SFAM01.1 P35U, J, CLP257782-49-2 10 12/13/21Silverug/L 12/23/21 CLP SFAM01.1 P10U7440-22-4 5000 12/13/21Sodiumug/L 12/23/21 CLP SFAM01.1 P280007440-23-5 25 12/13/21Thalliumug/L 12/23/21 CLP SFAM01.1 P25U7440-28-0 50 12/13/21Vanadiumug/L 12/23/21 CLP SFAM01.1 P50U7440-62-2 60 12/13/21Zincug/L 12/23/21 CLP SFAM01.1 P15J, Q-27440-66-6 1/27/22 14:19C215303 DMTL TMTL FINAL 01 27 22 1419Page 11 of 12 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Denise Goddard Dissolved Metals Sample ID:Lab ID: MW-6_Dis C215303-08 Matrix:Groundwater Date Collected:12/7/21 14:18 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT7 CHM MD No: BLT7 CHM Station ID:MW-6 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 200 12/13/21Aluminumug/L 12/20/21 CLP SFAM01.1 P200U7429-90-5 60 12/13/21Antimonyug/L 12/20/21 CLP SFAM01.1 P60U7440-36-0 10 12/13/21Arsenicug/L 12/20/21 CLP SFAM01.1 P10U7440-38-2 200 12/13/21Bariumug/L 12/20/21 CLP SFAM01.1 P91J, Q-27440-39-3 5.0 12/13/21Berylliumug/L 12/20/21 CLP SFAM01.1 P5.0 U7440-41-7 5.0 12/13/21Cadmiumug/L 12/20/21 CLP SFAM01.1 P5.0 U7440-43-9 5000 12/13/21Calciumug/L 12/20/21 CLP SFAM01.1 P1600J, Q-27440-70-2 10 12/13/21Chromiumug/L 12/20/21 CLP SFAM01.1 P467440-47-3 50 12/13/21Cobaltug/L 12/20/21 CLP SFAM01.1 P7.1 J, Q-27440-48-4 25 12/13/21Copperug/L 12/20/21 CLP SFAM01.1 P25U7440-50-8 100 12/13/21Ironug/L 12/20/21 CLP SFAM01.1 P32007439-89-6 10 12/13/21Leadug/L 12/20/21 CLP SFAM01.1 P12U, B-47439-92-1 5000 12/13/21Magnesiumug/L 12/20/21 CLP SFAM01.1 P600J, Q-27439-95-4 15 12/13/21Manganeseug/L 12/20/21 CLP SFAM01.1 P26007439-96-5 40 12/13/21Nickelug/L 12/20/21 CLP SFAM01.1 P907440-02-0 5000 12/13/21Potassiumug/L 12/20/21 CLP SFAM01.1 P630J, Q-27440-09-7 35 12/13/21Seleniumug/L 12/20/21 CLP SFAM01.1 P35U, J, CLP257782-49-2 10 12/13/21Silverug/L 12/20/21 CLP SFAM01.1 P10U7440-22-4 5000 12/13/21Sodiumug/L 12/20/21 CLP SFAM01.1 P270007440-23-5 25 12/13/21Thalliumug/L 12/20/21 CLP SFAM01.1 P25U7440-28-0 50 12/13/21Vanadiumug/L 12/20/21 CLP SFAM01.1 P50U7440-62-2 60 12/13/21Zincug/L 12/20/21 CLP SFAM01.1 P19J, Q-27440-66-6 1/27/22 14:19C215303 DMTL TMTL FINAL 01 27 22 1419Page 12 of 12 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Jeffrey Wilmoth January 28, 2022 MEMORANDUM SUBJECT: FROM: FINAL Analytical Report Project: 22-0052, Holcomb Creosote 4LSASD-QAPSB Jeffrey Wilmoth Quality Assurance Section, Chemist Quality Assurance Section Floyd Wellborn, ChiefTHRU: TO:Joydeb Majumder Attached are the final results for the analytical groups listed below. These analyses were performed in accordance with the associated contract Statement Of Work (SOW). In general, project data quality objectives have not been used to evaluate these data prior to release by the Quality Assurance Section. For a listing of specific data qualifiers and explanations, please refer to the Data Qualifier Definitions included in this report. Analyses Included in this report:Method Used: Semi Volatile Organics (SVOA) Semivolatile organic compounds CLP BNA (Water) 1/28/22 14:23C215303 SVOA FINAL 01 28 22 1423Page 1 of 21 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Jeffrey Wilmoth Report Narrative for Work Order: C215303 Analysis: SVOA Organic Data Review and Validation Report Site Name: Holcomb Creosote, Yadkinville, NC CLP Case No. 49842, Element® Sample Nos. C215303-01, 03, 05, 07, C215301-01 (PES) Sampling Date(s): 12/7/21 Validated Time of Sample Receipt: 12/9/21 Laboratory Performing Organic Analysis: Chemtech Consulting Group, Mountainside, NJ Date Received from Lab: 12/29/21 (posted at SMO portal) Analyses conducted: Semivolatile Extractables The ESAT Work Team reviewed data for 4 water samples analyzed for Semivolatile Extractables only, per CLP statement of Work (SOW) SFAM01.1. The analytical results were reported in one sample delivery group (SDG) by the laboratory. One performance evaluation sample (PES) for evaluating the laboratory’s performance with using the method was submitted to the laboratory. A Stage 4 validation consisting of an electronic/manual review (S4VEM) was performed on the organic samples submitted for this case. The data package presents acceptable technical performance with qualifications. The laboratory satisfied all contractual and technical holding time limits. All results associated with erratic initial calibration (ICAL)) performance were flagged “J” with the appropriate Element® qualifier (CLP16). The percent difference between an initial calibration (ICAL) and a second source verification standard exceeded 20% for Benzaldehyde. The associated Benzaldehyde results were qualified “J” (QC-3). Deuterated Monitoring Compounds (DMCs) were used as surrogates in each sample for GC/MS analysis to monitor extraction efficiency. Pertinent data quality factors are discussed below. 1.The performance evaluation sample (PES) recoveries for Semivolatile Extractables were scored within limits by the web-based SPS Web software. Therefore, no data qualification was required based on these criteria. 2.Percent recovery of the DMC 2,4-Dichlorophenol-d3 was less the lower QC limit in sample C215303-07. The associated results were non-detects and were qualified “UJ” (QS-3). 1/28/22 14:23C215303 SVOA FINAL 01 28 22 1423Page 2 of 21 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Jeffrey Wilmoth Data qualification factors are explained by the Region 4 - specific qualifier definitions which are included elsewhere in this report. Further details are provided in the complete data review report, which is on file in the Region 4 LSASD Records Center. cc: Nardina Turner 1/28/22 14:23C215303 SVOA FINAL 01 28 22 1423Page 3 of 21 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Jeffrey Wilmoth Date CollectedMatrixLaboratory IDSample ID SAMPLES INCLUDED IN THIS REPORT Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 MD#D# BLT0BLT0MW-2 C215303-01 Groundwater 12/7/21 16:37 BLT1BLT1MW-57 C215303-03 Groundwater 12/7/21 15:22 BLT2BLT2MW-58 C215303-05 Groundwater 12/7/21 16:26 BLT3BLT3MW-6 C215303-07 Groundwater 12/7/21 14:18 1/28/22 14:23C215303 SVOA FINAL 01 28 22 1423Page 4 of 21 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Jeffrey Wilmoth DATA QUALIFIER DEFINITIONS U The analyte was not detected at or above the reporting limit. CLP01 Concentration reported is less than the lowest standard on calibration curve CLP15 TIC Results Reported as Identified by Lab - IDs Not Verified CLP16 Initial Calibration Response Erratic J The identification of the analyte is acceptable; the reported value is an estimate. NJ Presumptive evidence that analyte is present; reported as a tentative identification with an estimated value. QC-3 Analyte calibration criteria not met QS-3 Surrogate recovery is lower than established control limits. ACRONYMS AND ABBREVIATIONS CAS Chemical Abstracts Service Note: Analytes with no known CAS identifiers have been assigned codes beginning with "E", the EPA ID as assigned by the EPA Substance Registry System (www.epa.gov/srs), or beginning with "R4-", a unique identifier assigned by the EPA Region 4 laboratory. MDL Method Detection Limit - The minimum concentration of a substance (an analyte) that can be measured and reported with a 99% confidence that the analyte concentration is greater than zero. MRL Minimum Reporting Limit - Analyte concentration that corresponds to the lowest demonstrated level of acceptable quantitation. The MRL is sample-specific and accounts for preparation weights and volumes, dilutions, and moisture content of soil/sediments. TIC Tentatively Identified Compound - An analyte identified based on a match with the instrument software's mass spectral library. A calibration standard has not been analyzed to confirm the compound's identification or the estimated concentration reported. 1/28/22 14:23C215303 SVOA FINAL 01 28 22 1423Page 5 of 21 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Jeffrey Wilmoth Semi Volatile Organics Sample ID:Lab ID: MW-2 C215303-01 Matrix:Groundwater Date Collected:12/7/21 16:37 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT0 CHM MD No: BLT0 CHM Station ID:MW-2 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 10 12/12/21(3-and/or 4-)Methylphenol ug/L 12/14/21 CLP SFAM01.1 B10U1319-77-3 25 12/12/211,1-Biphenyl ug/L 12/15/21 CLP SFAM01.1 B12092-52-4 5.0 12/12/211,2,4,5-Tetrachlorobenzene ug/L 12/14/21 CLP SFAM01.1 B5.0 U95-94-3 2.0 12/12/211,4-Dioxane ug/L 12/14/21 CLP SFAM01.1 B2.0 U123-91-1 250 12/12/211-Methylnaphthalene ug/L 12/16/21 CLP SFAM01.1 B56090-12-0 5.0 12/12/212,3,4,6-Tetrachlorophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U58-90-2 5.0 12/12/212,4,5-Trichlorophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U95-95-4 5.0 12/12/212,4,6-Trichlorophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U88-06-2 5.0 12/12/212,4-Dichlorophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U120-83-2 5.0 12/12/212,4-Dimethylphenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U105-67-9 10 12/12/212,4-Dinitrophenol ug/L 12/14/21 CLP SFAM01.1 B10U51-28-5 5.0 12/12/212,4-Dinitrotoluene ug/L 12/14/21 CLP SFAM01.1 B5.0 U121-14-2 5.0 12/12/212,6-Dinitrotoluene ug/L 12/14/21 CLP SFAM01.1 B5.0 U606-20-2 5.0 12/12/212-Chloronaphthalene ug/L 12/14/21 CLP SFAM01.1 B5.0 U91-58-7 5.0 12/12/212-Chlorophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U95-57-8 10 12/12/212-Methyl-4,6-dinitrophenol ug/L 12/14/21 CLP SFAM01.1 B10U534-52-1 250 12/12/212-Methylnaphthalene ug/L 12/16/21 CLP SFAM01.1 B110091-57-6 10 12/12/212-Methylphenol ug/L 12/14/21 CLP SFAM01.1 B10U95-48-7 5.0 12/12/212-Nitroaniline ug/L 12/14/21 CLP SFAM01.1 B5.0 U88-74-4 5.0 12/12/212-Nitrophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U88-75-5 10 12/12/213,3'-Dichlorobenzidine ug/L 12/14/21 CLP SFAM01.1 B10U91-94-1 10 12/12/213-Nitroaniline ug/L 12/14/21 CLP SFAM01.1 B10U99-09-2 5.0 12/12/214-Bromophenyl phenyl ether ug/L 12/14/21 CLP SFAM01.1 B5.0 U101-55-3 5.0 12/12/214-Chloro-3-methylphenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U59-50-7 10 12/12/214-Chloroaniline ug/L 12/14/21 CLP SFAM01.1 B10U106-47-8 5.0 12/12/214-Chlorophenyl phenyl ether ug/L 12/14/21 CLP SFAM01.1 B5.0 U7005-72-3 10 12/12/214-Nitroaniline ug/L 12/14/21 CLP SFAM01.1 B10U100-01-6 10 12/12/214-Nitrophenol ug/L 12/14/21 CLP SFAM01.1 B10U100-02-7 1/28/22 14:23C215303 SVOA FINAL 01 28 22 1423Page 6 of 21 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Jeffrey Wilmoth Semi Volatile Organics Sample ID:Lab ID: MW-2 C215303-01 Matrix:Groundwater Date Collected:12/7/21 16:37 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT0 CHM MD No: BLT0 CHM Station ID:MW-2 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 250 12/12/21Acenaphtheneug/L 12/16/21 CLP SFAM01.1 B52083-32-9 5.0 12/12/21Acenaphthyleneug/L 12/14/21 CLP SFAM01.1 B5.0 U208-96-8 10 12/12/21Acetophenoneug/L 12/14/21 CLP SFAM01.1 B3.8 J, CLP0198-86-2 5.0 12/12/21Anthraceneug/L 12/14/21 CLP SFAM01.1 B1.9 J, CLP01120-12-7 10 12/12/21Atrazineug/L 12/14/21 CLP SFAM01.1 B10U1912-24-9 10 12/12/21Benzaldehydeug/L 12/14/21 CLP SFAM01.1 B10U, J, CLP16, QC-3 100-52-7 5.0 12/12/21Benzo(a)anthracene ug/L 12/14/21 CLP SFAM01.1 B5.0 U56-55-3 5.0 12/12/21Benzo(a)pyrene ug/L 12/14/21 CLP SFAM01.1 B5.0 U50-32-8 5.0 12/12/21Benzo(b)fluoranthene ug/L 12/14/21 CLP SFAM01.1 B5.0 U205-99-2 5.0 12/12/21Benzo(g,h,i)perylene ug/L 12/14/21 CLP SFAM01.1 B5.0 U191-24-2 5.0 12/12/21Benzo(k)fluoranthene ug/L 12/14/21 CLP SFAM01.1 B5.0 U207-08-9 5.0 12/12/21Benzyl butyl phthalate ug/L 12/14/21 CLP SFAM01.1 B5.0 U85-68-7 10 12/12/21Bis(2-chloro-1-methylethyl) ether ug/L 12/14/21 CLP SFAM01.1 B10U108-60-1 5.0 12/12/21Bis(2-chloroethoxy)methane ug/L 12/14/21 CLP SFAM01.1 B5.0 U111-91-1 10 12/12/21bis(2-Chloroethyl) Ether ug/L 12/14/21 CLP SFAM01.1 B10U111-44-4 5.0 12/12/21Bis(2-ethylhexyl) phthalate ug/L 12/14/21 CLP SFAM01.1 B5.0 U117-81-7 10 12/12/21Caprolactamug/L 12/14/21 CLP SFAM01.1 B10U105-60-2 10 12/12/21Carbazoleug/L 12/14/21 CLP SFAM01.1 B11086-74-8 5.0 12/12/21Chryseneug/L 12/14/21 CLP SFAM01.1 B5.0 U218-01-9 5.0 12/12/21Dibenzo(a,h)anthracene ug/L 12/14/21 CLP SFAM01.1 B5.0 U53-70-3 25 12/12/21Dibenzofuranug/L 12/15/21 CLP SFAM01.1 B290132-64-9 5.0 12/12/21Diethyl phthalate ug/L 12/14/21 CLP SFAM01.1 B5.0 U84-66-2 5.0 12/12/21Dimethyl phthalate ug/L 12/14/21 CLP SFAM01.1 B5.0 U131-11-3 5.0 12/12/21Di-n-butylphthalate ug/L 12/14/21 CLP SFAM01.1 B5.0 U84-74-2 10 12/12/21Di-n-octylphthalate ug/L 12/14/21 CLP SFAM01.1 B10U117-84-0 5.0 12/12/21Fluorantheneug/L 12/14/21 CLP SFAM01.1 B10206-44-0 25 12/12/21Fluoreneug/L 12/15/21 CLP SFAM01.1 B20086-73-7 5.0 12/12/21Hexachlorobenzene (HCB)ug/L 12/14/21 CLP SFAM01.1 B5.0 U118-74-1 1/28/22 14:23C215303 SVOA FINAL 01 28 22 1423Page 7 of 21 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Jeffrey Wilmoth Semi Volatile Organics Sample ID:Lab ID: MW-2 C215303-01 Matrix:Groundwater Date Collected:12/7/21 16:37 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT0 CHM MD No: BLT0 CHM Station ID:MW-2 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 5.0 12/12/21Hexachlorobutadieneug/L 12/14/21 CLP SFAM01.1 B5.0 U87-68-3 10 12/12/21Hexachlorocyclopentadiene (HCCP)ug/L 12/14/21 CLP SFAM01.1 B10U77-47-4 5.0 12/12/21Hexachloroethaneug/L 12/14/21 CLP SFAM01.1 B5.0 U67-72-1 5.0 12/12/21Indeno (1,2,3-cd) pyrene ug/L 12/14/21 CLP SFAM01.1 B5.0 U193-39-5 5.0 12/12/21Isophoroneug/L 12/14/21 CLP SFAM01.1 B5.0 U78-59-1 250 12/12/21Naphthaleneug/L 12/16/21 CLP SFAM01.1 B380091-20-3 5.0 12/12/21Nitrobenzeneug/L 12/14/21 CLP SFAM01.1 B5.0 U98-95-3 5.0 12/12/21n-Nitroso di-n-Propylamine ug/L 12/14/21 CLP SFAM01.1 B5.0 U621-64-7 5.0 12/12/21n-Nitrosodiphenylamine/Diphenylamine ug/L 12/14/21 CLP SFAM01.1 B5.0 U122-39-4 10 12/12/21Pentachlorophenolug/L 12/14/21 CLP SFAM01.1 B10U87-86-5 25 12/12/21Phenanthreneug/L 12/15/21 CLP SFAM01.1 B20085-01-8 10 12/12/21Phenolug/L 12/14/21 CLP SFAM01.1 B10U108-95-2 5.0 12/12/21Pyreneug/L 12/14/21 CLP SFAM01.1 B4.2 J, CLP01129-00-0 Tentatively Identified Compounds: 12/12/21 CLP SFAM01.1 B12/14/21ug/L30[1,1-Biphenyl]-4-carboxaldehyde NJ, CLP153218-36-8 12/12/21 CLP SFAM01.1 B12/14/21ug/L601(2H)-Acenaphthylenone NJ, CLP152235-15-6 12/12/21 CLP SFAM01.1 B12/14/21ug/L101(3H)-Isobenzofuranone NJ, CLP1587-41-2 12/12/21 CLP SFAM01.1 B12/14/21ug/L101,1-Biphenyl, 4-methyl-NJ, CLP15644-08-6 12/12/21 CLP SFAM01.1 B12/14/21ug/L201-Isopropenylnaphthalene NJ, CLP151855-47-6 12/12/21 CLP SFAM01.1 B12/14/21ug/L91-Naphthalenecarboxylic acid NJ, CLP1586-55-5 12/12/21 CLP SFAM01.1 B12/14/21ug/L101-Naphthalenemethanol NJ, CLP154780-79-4 12/12/21 CLP SFAM01.1 B12/14/21ug/L102-Acetylbenzoic acid NJ, CLP15577-56-0 12/12/21 CLP SFAM01.1 B12/14/21ug/L104,6,8-Trimethylazulene NJ, CLP15941-81-1 12/12/21 CLP SFAM01.1 B12/14/21ug/L104H-Cyclopenta[def]phenanthrene NJ, CLP15203-64-5 12/12/21 CLP SFAM01.1 B12/14/21ug/L109,10-Anthracenedione NJ, CLP1584-65-1 12/12/21 CLP SFAM01.1 B12/14/21ug/L309H-Fluoren-9-one NJ, CLP15486-25-9 12/12/21 CLP SFAM01.1 B12/14/21ug/L10Benzene, [1-(2,4-cyclopentadien-1-NJ, CLP152320-32-3 12/12/21 CLP SFAM01.1 B12/14/21ug/L20Benzene, 1,2,3-trimethyl-NJ, CLP15526-73-8 12/12/21 CLP SFAM01.1 B12/14/21ug/L10Benzene, 1-ethyl-3-methyl-NJ, CLP15620-14-4 1/28/22 14:23C215303 SVOA FINAL 01 28 22 1423Page 8 of 21 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Jeffrey Wilmoth Semi Volatile Organics Sample ID:Lab ID: MW-2 C215303-01 Matrix:Groundwater Date Collected:12/7/21 16:37 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT0 CHM MD No: BLT0 CHM Station ID:MW-2 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method Tentatively Identified Compounds: 12/12/21 CLP SFAM01.1 B12/14/21ug/L40Dibenzofuran, 4-methyl-NJ, CLP157320-53-8 12/12/21 CLP SFAM01.1 B12/14/21ug/L20DibenzothiopheneNJ, CLP15132-65-0 12/12/21 CLP SFAM01.1 B12/14/21ug/L9FenchoneNJ, CLP151195-79-5 12/12/21 CLP SFAM01.1 B12/14/21ug/L8FurfuralNJ, CLP1598-01-1 12/12/21 CLP SFAM01.1 B12/14/21ug/L20Heptanoic acid NJ, CLP15111-14-8 12/12/21 CLP SFAM01.1 B12/14/21ug/L40IndaneNJ, CLP15496-11-7 12/12/21 CLP SFAM01.1 B12/14/21ug/L30MesityleneNJ, CLP15108-67-8 12/12/21 CLP SFAM01.1 B12/14/21ug/L20Naphthalene, 1,3-dimethyl-NJ, CLP15575-41-7 12/12/21 CLP SFAM01.1 B12/14/21ug/L70Naphthalene, 1,6-dimethyl-NJ, CLP15575-43-9 12/12/21 CLP SFAM01.1 B12/14/21ug/L6Naphthalene, 1,7-dimethyl-NJ, CLP15575-37-1 12/12/21 CLP SFAM01.1 B12/14/21ug/L70Naphthalene, 2,3-dimethyl-NJ, CLP15581-40-8 12/12/21 CLP SFAM01.1 B12/14/21ug/L50Naphthalene, 2-ethyl-NJ, CLP15939-27-5 12/12/21 CLP SFAM01.1 B12/14/21ug/L20NordiphenamidNJ, CLP15954-21-2 12/12/21 CLP SFAM01.1 B12/14/21ug/L60p-Cymene NJ, CLP1599-87-6 1/28/22 14:23C215303 SVOA FINAL 01 28 22 1423Page 9 of 21 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Jeffrey Wilmoth Semi Volatile Organics Sample ID:Lab ID: MW-57 C215303-03 Matrix:Groundwater Date Collected:12/7/21 15:22 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT1 CHM MD No: BLT1 CHM Station ID:MW-57 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 10 12/12/21(3-and/or 4-)Methylphenol ug/L 12/14/21 CLP SFAM01.1 B10U1319-77-3 25 12/12/211,1-Biphenyl ug/L 12/15/21 CLP SFAM01.1 B18092-52-4 5.0 12/12/211,2,4,5-Tetrachlorobenzene ug/L 12/14/21 CLP SFAM01.1 B5.0 U95-94-3 2.0 12/12/211,4-Dioxane ug/L 12/14/21 CLP SFAM01.1 B2.0 U123-91-1 25 12/12/211-Methylnaphthalene ug/L 12/15/21 CLP SFAM01.1 B33090-12-0 5.0 12/12/212,3,4,6-Tetrachlorophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U58-90-2 5.0 12/12/212,4,5-Trichlorophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U95-95-4 5.0 12/12/212,4,6-Trichlorophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U88-06-2 5.0 12/12/212,4-Dichlorophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U120-83-2 5.0 12/12/212,4-Dimethylphenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U105-67-9 10 12/12/212,4-Dinitrophenol ug/L 12/14/21 CLP SFAM01.1 B10U51-28-5 5.0 12/12/212,4-Dinitrotoluene ug/L 12/14/21 CLP SFAM01.1 B5.0 U121-14-2 5.0 12/12/212,6-Dinitrotoluene ug/L 12/14/21 CLP SFAM01.1 B5.0 U606-20-2 5.0 12/12/212-Chloronaphthalene ug/L 12/14/21 CLP SFAM01.1 B5.0 U91-58-7 5.0 12/12/212-Chlorophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U95-57-8 10 12/12/212-Methyl-4,6-dinitrophenol ug/L 12/14/21 CLP SFAM01.1 B10U534-52-1 250 12/12/212-Methylnaphthalene ug/L 12/16/21 CLP SFAM01.1 B73091-57-6 10 12/12/212-Methylphenol ug/L 12/14/21 CLP SFAM01.1 B10U95-48-7 5.0 12/12/212-Nitroaniline ug/L 12/14/21 CLP SFAM01.1 B5.0 U88-74-4 5.0 12/12/212-Nitrophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U88-75-5 10 12/12/213,3'-Dichlorobenzidine ug/L 12/14/21 CLP SFAM01.1 B10U91-94-1 10 12/12/213-Nitroaniline ug/L 12/14/21 CLP SFAM01.1 B10U99-09-2 5.0 12/12/214-Bromophenyl phenyl ether ug/L 12/14/21 CLP SFAM01.1 B5.0 U101-55-3 5.0 12/12/214-Chloro-3-methylphenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U59-50-7 10 12/12/214-Chloroaniline ug/L 12/14/21 CLP SFAM01.1 B10U106-47-8 5.0 12/12/214-Chlorophenyl phenyl ether ug/L 12/14/21 CLP SFAM01.1 B5.0 U7005-72-3 10 12/12/214-Nitroaniline ug/L 12/14/21 CLP SFAM01.1 B10U100-01-6 10 12/12/214-Nitrophenol ug/L 12/14/21 CLP SFAM01.1 B10U100-02-7 1/28/22 14:23C215303 SVOA FINAL 01 28 22 1423Page 10 of 21 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Jeffrey Wilmoth Semi Volatile Organics Sample ID:Lab ID: MW-57 C215303-03 Matrix:Groundwater Date Collected:12/7/21 15:22 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT1 CHM MD No: BLT1 CHM Station ID:MW-57 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 5.0 12/12/21Acenaphtheneug/L 12/14/21 CLP SFAM01.1 B2783-32-9 5.0 12/12/21Acenaphthyleneug/L 12/14/21 CLP SFAM01.1 B5.0 U208-96-8 10 12/12/21Acetophenoneug/L 12/14/21 CLP SFAM01.1 B6.1 J, CLP0198-86-2 5.0 12/12/21Anthraceneug/L 12/14/21 CLP SFAM01.1 B5.0 U120-12-7 10 12/12/21Atrazineug/L 12/14/21 CLP SFAM01.1 B10U1912-24-9 10 12/12/21Benzaldehydeug/L 12/14/21 CLP SFAM01.1 B10U, J, CLP16, QC-3 100-52-7 5.0 12/12/21Benzo(a)anthracene ug/L 12/14/21 CLP SFAM01.1 B5.0 U56-55-3 5.0 12/12/21Benzo(a)pyrene ug/L 12/14/21 CLP SFAM01.1 B5.0 U50-32-8 5.0 12/12/21Benzo(b)fluoranthene ug/L 12/14/21 CLP SFAM01.1 B5.0 U205-99-2 5.0 12/12/21Benzo(g,h,i)perylene ug/L 12/14/21 CLP SFAM01.1 B5.0 U191-24-2 5.0 12/12/21Benzo(k)fluoranthene ug/L 12/14/21 CLP SFAM01.1 B5.0 U207-08-9 5.0 12/12/21Benzyl butyl phthalate ug/L 12/14/21 CLP SFAM01.1 B5.0 U85-68-7 10 12/12/21Bis(2-chloro-1-methylethyl) ether ug/L 12/14/21 CLP SFAM01.1 B10U108-60-1 5.0 12/12/21Bis(2-chloroethoxy)methane ug/L 12/14/21 CLP SFAM01.1 B5.0 U111-91-1 10 12/12/21bis(2-Chloroethyl) Ether ug/L 12/14/21 CLP SFAM01.1 B10U111-44-4 5.0 12/12/21Bis(2-ethylhexyl) phthalate ug/L 12/14/21 CLP SFAM01.1 B5.0 U117-81-7 10 12/12/21Caprolactamug/L 12/14/21 CLP SFAM01.1 B10U105-60-2 10 12/12/21Carbazoleug/L 12/14/21 CLP SFAM01.1 B1886-74-8 5.0 12/12/21Chryseneug/L 12/14/21 CLP SFAM01.1 B5.0 U218-01-9 5.0 12/12/21Dibenzo(a,h)anthracene ug/L 12/14/21 CLP SFAM01.1 B5.0 U53-70-3 25 12/12/21Dibenzofuranug/L 12/15/21 CLP SFAM01.1 B290132-64-9 5.0 12/12/21Diethyl phthalate ug/L 12/14/21 CLP SFAM01.1 B5.0 U84-66-2 5.0 12/12/21Dimethyl phthalate ug/L 12/14/21 CLP SFAM01.1 B5.0 U131-11-3 5.0 12/12/21Di-n-butylphthalate ug/L 12/14/21 CLP SFAM01.1 B5.0 U84-74-2 10 12/12/21Di-n-octylphthalate ug/L 12/14/21 CLP SFAM01.1 B10U117-84-0 5.0 12/12/21Fluorantheneug/L 12/14/21 CLP SFAM01.1 B5.0 U206-44-0 5.0 12/12/21Fluoreneug/L 12/14/21 CLP SFAM01.1 B2186-73-7 5.0 12/12/21Hexachlorobenzene (HCB)ug/L 12/14/21 CLP SFAM01.1 B5.0 U118-74-1 1/28/22 14:23C215303 SVOA FINAL 01 28 22 1423Page 11 of 21 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Jeffrey Wilmoth Semi Volatile Organics Sample ID:Lab ID: MW-57 C215303-03 Matrix:Groundwater Date Collected:12/7/21 15:22 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT1 CHM MD No: BLT1 CHM Station ID:MW-57 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 5.0 12/12/21Hexachlorobutadieneug/L 12/14/21 CLP SFAM01.1 B5.0 U87-68-3 10 12/12/21Hexachlorocyclopentadiene (HCCP)ug/L 12/14/21 CLP SFAM01.1 B10U77-47-4 5.0 12/12/21Hexachloroethaneug/L 12/14/21 CLP SFAM01.1 B5.0 U67-72-1 5.0 12/12/21Indeno (1,2,3-cd) pyrene ug/L 12/14/21 CLP SFAM01.1 B5.0 U193-39-5 5.0 12/12/21Isophoroneug/L 12/14/21 CLP SFAM01.1 B5.0 U78-59-1 1300 12/12/21Naphthaleneug/L 12/17/21 CLP SFAM01.1 B750091-20-3 5.0 12/12/21Nitrobenzeneug/L 12/14/21 CLP SFAM01.1 B5.0 U98-95-3 5.0 12/12/21n-Nitroso di-n-Propylamine ug/L 12/14/21 CLP SFAM01.1 B5.0 U621-64-7 5.0 12/12/21n-Nitrosodiphenylamine/Diphenylamine ug/L 12/14/21 CLP SFAM01.1 B5.0 U122-39-4 10 12/12/21Pentachlorophenolug/L 12/14/21 CLP SFAM01.1 B10U87-86-5 5.0 12/12/21Phenanthreneug/L 12/14/21 CLP SFAM01.1 B2285-01-8 10 12/12/21Phenolug/L 12/14/21 CLP SFAM01.1 B10U108-95-2 5.0 12/12/21Pyreneug/L 12/14/21 CLP SFAM01.1 B5.0 U129-00-0 Tentatively Identified Compounds: 12/12/21 CLP SFAM01.1 B12/14/21ug/L81,2-Benzenedicarboxylic acid, mono NJ, CLP15131-70-4 12/12/21 CLP SFAM01.1 B12/14/21ug/L401-Acenaphthenol NJ, CLP156306-07-6 12/12/21 CLP SFAM01.1 B12/14/21ug/L51-Naphthalenol, 2-amino-NJ, CLP15606-41-7 12/12/21 CLP SFAM01.1 B12/14/21ug/L82(1H)-Quinolinone NJ, CLP1559-31-4 12/12/21 CLP SFAM01.1 B12/14/21ug/L42(1H)-Quinolinone, 4-methyl-NJ, CLP15607-66-9 12/12/21 CLP SFAM01.1 B12/14/21ug/L62-Naphthalenecarboxylic acid NJ, CLP1593-09-4 12/12/21 CLP SFAM01.1 B12/14/21ug/L44-Amino-1-naphthol NJ, CLP152834-90-4 12/12/21 CLP SFAM01.1 B12/14/21ug/L66(5H)-Phenanthridinone NJ, CLP151015-89-0 12/12/21 CLP SFAM01.1 B12/14/21ug/L108-Methylquinolin-2(1H)-one NJ, CLP151000502-93-2 12/12/21 CLP SFAM01.1 B12/14/21ug/L709H-Fluoren-9-one NJ, CLP15486-25-9 12/12/21 CLP SFAM01.1 B12/14/21ug/L30Benzene, 1,2,3-trimethyl-NJ, CLP15526-73-8 12/12/21 CLP SFAM01.1 B12/14/21ug/L10Benzene, 1,3-dimethyl-NJ, CLP15108-38-3 12/12/21 CLP SFAM01.1 B12/14/21ug/L30Benzene, 1-ethyl-3-methyl-NJ, CLP15620-14-4 12/12/21 CLP SFAM01.1 B12/14/21ug/L10Benzene, 4-ethyl-1,2-dimethyl-NJ, CLP15934-80-5 12/12/21 CLP SFAM01.1 B12/14/21ug/L10Dibenzofuran, 4-methyl-NJ, CLP157320-53-8 1/28/22 14:23C215303 SVOA FINAL 01 28 22 1423Page 12 of 21 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Jeffrey Wilmoth Semi Volatile Organics Sample ID:Lab ID: MW-57 C215303-03 Matrix:Groundwater Date Collected:12/7/21 15:22 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT1 CHM MD No: BLT1 CHM Station ID:MW-57 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method Tentatively Identified Compounds: 12/12/21 CLP SFAM01.1 B12/14/21ug/L10Dibenzothiophene sulfone NJ, CLP151016-05-3 12/12/21 CLP SFAM01.1 B12/14/21ug/L10EthylbenzeneNJ, CLP15100-41-4 12/12/21 CLP SFAM01.1 B12/14/21ug/L20FenchoneNJ, CLP151195-79-5 12/12/21 CLP SFAM01.1 B12/14/21ug/L200IndaneNJ, CLP15496-11-7 12/12/21 CLP SFAM01.1 B12/14/21ug/L80MesityleneNJ, CLP15108-67-8 12/12/21 CLP SFAM01.1 B12/14/21ug/L30Naphthalene, 1,6-dimethyl-NJ, CLP15575-43-9 12/12/21 CLP SFAM01.1 B12/14/21ug/L20Naphthalene, 1-ethyl-NJ, CLP151127-76-0 12/12/21 CLP SFAM01.1 B12/14/21ug/L20Naphthalene, 2,3-dimethyl-NJ, CLP15581-40-8 12/12/21 CLP SFAM01.1 B12/14/21ug/L20Naphthalic anhydride NJ, CLP1581-84-5 12/12/21 CLP SFAM01.1 B12/14/21ug/L50o-Cymene NJ, CLP15527-84-4 12/12/21 CLP SFAM01.1 B12/14/21ug/L4PhenanthridineNJ, CLP15229-87-8 12/12/21 CLP SFAM01.1 B12/14/21ug/L30p-Xylene NJ, CLP15106-42-3 12/12/21 CLP SFAM01.1 B12/14/21ug/L10Quinoline, 5-methyl-NJ, CLP157661-55-4 12/12/21 CLP SFAM01.1 B12/14/21ug/L6XanthoneNJ, CLP1590-47-1 1/28/22 14:23C215303 SVOA FINAL 01 28 22 1423Page 13 of 21 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Jeffrey Wilmoth Semi Volatile Organics Sample ID:Lab ID: MW-58 C215303-05 Matrix:Groundwater Date Collected:12/7/21 16:26 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT2 CHM MD No: BLT2 CHM Station ID:MW-58 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 10 12/12/21(3-and/or 4-)Methylphenol ug/L 12/14/21 CLP SFAM01.1 B10U1319-77-3 50 12/12/211,1-Biphenyl ug/L 12/15/21 CLP SFAM01.1 B14092-52-4 5.0 12/12/211,2,4,5-Tetrachlorobenzene ug/L 12/14/21 CLP SFAM01.1 B5.0 U95-94-3 2.0 12/12/211,4-Dioxane ug/L 12/14/21 CLP SFAM01.1 B2.0 U123-91-1 50 12/12/211-Methylnaphthalene ug/L 12/15/21 CLP SFAM01.1 B38090-12-0 5.0 12/12/212,3,4,6-Tetrachlorophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U58-90-2 5.0 12/12/212,4,5-Trichlorophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U95-95-4 5.0 12/12/212,4,6-Trichlorophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U88-06-2 5.0 12/12/212,4-Dichlorophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U120-83-2 5.0 12/12/212,4-Dimethylphenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U105-67-9 10 12/12/212,4-Dinitrophenol ug/L 12/14/21 CLP SFAM01.1 B10U51-28-5 5.0 12/12/212,4-Dinitrotoluene ug/L 12/14/21 CLP SFAM01.1 B5.0 U121-14-2 5.0 12/12/212,6-Dinitrotoluene ug/L 12/14/21 CLP SFAM01.1 B5.0 U606-20-2 5.0 12/12/212-Chloronaphthalene ug/L 12/14/21 CLP SFAM01.1 B5.0 U91-58-7 5.0 12/12/212-Chlorophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U95-57-8 10 12/12/212-Methyl-4,6-dinitrophenol ug/L 12/14/21 CLP SFAM01.1 B10U534-52-1 100 12/12/212-Methylnaphthalene ug/L 12/16/21 CLP SFAM01.1 B100091-57-6 10 12/12/212-Methylphenol ug/L 12/14/21 CLP SFAM01.1 B10U95-48-7 5.0 12/12/212-Nitroaniline ug/L 12/14/21 CLP SFAM01.1 B5.0 U88-74-4 5.0 12/12/212-Nitrophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U88-75-5 10 12/12/213,3'-Dichlorobenzidine ug/L 12/14/21 CLP SFAM01.1 B10U91-94-1 10 12/12/213-Nitroaniline ug/L 12/14/21 CLP SFAM01.1 B10U99-09-2 5.0 12/12/214-Bromophenyl phenyl ether ug/L 12/14/21 CLP SFAM01.1 B5.0 U101-55-3 5.0 12/12/214-Chloro-3-methylphenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U59-50-7 10 12/12/214-Chloroaniline ug/L 12/14/21 CLP SFAM01.1 B10U106-47-8 5.0 12/12/214-Chlorophenyl phenyl ether ug/L 12/14/21 CLP SFAM01.1 B5.0 U7005-72-3 10 12/12/214-Nitroaniline ug/L 12/14/21 CLP SFAM01.1 B10U100-01-6 10 12/12/214-Nitrophenol ug/L 12/14/21 CLP SFAM01.1 B10U100-02-7 1/28/22 14:23C215303 SVOA FINAL 01 28 22 1423Page 14 of 21 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Jeffrey Wilmoth Semi Volatile Organics Sample ID:Lab ID: MW-58 C215303-05 Matrix:Groundwater Date Collected:12/7/21 16:26 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT2 CHM MD No: BLT2 CHM Station ID:MW-58 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 50 12/12/21Acenaphtheneug/L 12/15/21 CLP SFAM01.1 B46083-32-9 5.0 12/12/21Acenaphthyleneug/L 12/14/21 CLP SFAM01.1 B13208-96-8 10 12/12/21Acetophenoneug/L 12/14/21 CLP SFAM01.1 B10U98-86-2 5.0 12/12/21Anthraceneug/L 12/14/21 CLP SFAM01.1 B2.3 J, CLP01120-12-7 10 12/12/21Atrazineug/L 12/14/21 CLP SFAM01.1 B10U1912-24-9 10 12/12/21Benzaldehydeug/L 12/14/21 CLP SFAM01.1 B10U, J, CLP16, QC-3 100-52-7 5.0 12/12/21Benzo(a)anthracene ug/L 12/14/21 CLP SFAM01.1 B5.0 U56-55-3 5.0 12/12/21Benzo(a)pyrene ug/L 12/14/21 CLP SFAM01.1 B5.0 U50-32-8 5.0 12/12/21Benzo(b)fluoranthene ug/L 12/14/21 CLP SFAM01.1 B5.0 U205-99-2 5.0 12/12/21Benzo(g,h,i)perylene ug/L 12/14/21 CLP SFAM01.1 B5.0 U191-24-2 5.0 12/12/21Benzo(k)fluoranthene ug/L 12/14/21 CLP SFAM01.1 B5.0 U207-08-9 5.0 12/12/21Benzyl butyl phthalate ug/L 12/14/21 CLP SFAM01.1 B5.0 U85-68-7 10 12/12/21Bis(2-chloro-1-methylethyl) ether ug/L 12/14/21 CLP SFAM01.1 B10U108-60-1 5.0 12/12/21Bis(2-chloroethoxy)methane ug/L 12/14/21 CLP SFAM01.1 B5.0 U111-91-1 10 12/12/21bis(2-Chloroethyl) Ether ug/L 12/14/21 CLP SFAM01.1 B10U111-44-4 5.0 12/12/21Bis(2-ethylhexyl) phthalate ug/L 12/14/21 CLP SFAM01.1 B5.0 U117-81-7 10 12/12/21Caprolactamug/L 12/14/21 CLP SFAM01.1 B10U105-60-2 10 12/12/21Carbazoleug/L 12/14/21 CLP SFAM01.1 B13086-74-8 5.0 12/12/21Chryseneug/L 12/14/21 CLP SFAM01.1 B5.0 U218-01-9 5.0 12/12/21Dibenzo(a,h)anthracene ug/L 12/14/21 CLP SFAM01.1 B5.0 U53-70-3 50 12/12/21Dibenzofuranug/L 12/15/21 CLP SFAM01.1 B380132-64-9 5.0 12/12/21Diethyl phthalate ug/L 12/14/21 CLP SFAM01.1 B5.0 U84-66-2 5.0 12/12/21Dimethyl phthalate ug/L 12/14/21 CLP SFAM01.1 B5.0 U131-11-3 5.0 12/12/21Di-n-butylphthalate ug/L 12/14/21 CLP SFAM01.1 B5.0 U84-74-2 10 12/12/21Di-n-octylphthalate ug/L 12/14/21 CLP SFAM01.1 B10U117-84-0 5.0 12/12/21Fluorantheneug/L 12/14/21 CLP SFAM01.1 B11206-44-0 50 12/12/21Fluoreneug/L 12/15/21 CLP SFAM01.1 B16086-73-7 5.0 12/12/21Hexachlorobenzene (HCB)ug/L 12/14/21 CLP SFAM01.1 B5.0 U118-74-1 1/28/22 14:23C215303 SVOA FINAL 01 28 22 1423Page 15 of 21 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Jeffrey Wilmoth Semi Volatile Organics Sample ID:Lab ID: MW-58 C215303-05 Matrix:Groundwater Date Collected:12/7/21 16:26 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT2 CHM MD No: BLT2 CHM Station ID:MW-58 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 5.0 12/12/21Hexachlorobutadieneug/L 12/14/21 CLP SFAM01.1 B5.0 U87-68-3 10 12/12/21Hexachlorocyclopentadiene (HCCP)ug/L 12/14/21 CLP SFAM01.1 B10U77-47-4 5.0 12/12/21Hexachloroethaneug/L 12/14/21 CLP SFAM01.1 B5.0 U67-72-1 5.0 12/12/21Indeno (1,2,3-cd) pyrene ug/L 12/14/21 CLP SFAM01.1 B5.0 U193-39-5 5.0 12/12/21Isophoroneug/L 12/14/21 CLP SFAM01.1 B5.0 U78-59-1 500 12/12/21Naphthaleneug/L 12/16/21 CLP SFAM01.1 B760091-20-3 5.0 12/12/21Nitrobenzeneug/L 12/14/21 CLP SFAM01.1 B5.0 U98-95-3 5.0 12/12/21n-Nitroso di-n-Propylamine ug/L 12/14/21 CLP SFAM01.1 B5.0 U621-64-7 5.0 12/12/21n-Nitrosodiphenylamine/Diphenylamine ug/L 12/14/21 CLP SFAM01.1 B5.0 U122-39-4 10 12/12/21Pentachlorophenolug/L 12/14/21 CLP SFAM01.1 B10U87-86-5 50 12/12/21Phenanthreneug/L 12/15/21 CLP SFAM01.1 B18085-01-8 10 12/12/21Phenolug/L 12/14/21 CLP SFAM01.1 B1.4 J, CLP01108-95-2 5.0 12/12/21Pyreneug/L 12/14/21 CLP SFAM01.1 B5.1129-00-0 Tentatively Identified Compounds: 12/12/21 CLP SFAM01.1 B12/14/21ug/L101,1-Biphenyl, 2-methyl-NJ, CLP15643-58-3 12/12/21 CLP SFAM01.1 B12/14/21ug/L601-Acenaphthenol NJ, CLP156306-07-6 12/12/21 CLP SFAM01.1 B12/14/21ug/L81H,3H-Naphtho[1,8-cd]pyran-1-one NJ, CLP15518-86-5 12/12/21 CLP SFAM01.1 B12/14/21ug/L71-Isopropenylnaphthalene NJ, CLP151855-47-6 12/12/21 CLP SFAM01.1 B12/14/21ug/L202,4,6-Cycloheptatrien-1-one, 2-phe NJ, CLP1514562-09-5 12/12/21 CLP SFAM01.1 B12/14/21ug/L103-Nitrocarbazole NJ, CLP153077-85-8 12/12/21 CLP SFAM01.1 B12/14/21ug/L68-Hydroxyquinoline NJ, CLP15148-24-3 12/12/21 CLP SFAM01.1 B12/14/21ug/L79,10-Anthracenedione NJ, CLP1584-65-1 12/12/21 CLP SFAM01.1 B12/14/21ug/L209H-Fluoren-3-ol NJ, CLP156344-67-8 12/12/21 CLP SFAM01.1 B12/14/21ug/L99H-Fluoren-9-ol NJ, CLP151689-64-1 12/12/21 CLP SFAM01.1 B12/14/21ug/L509H-Fluoren-9-one NJ, CLP15486-25-9 12/12/21 CLP SFAM01.1 B12/14/21ug/L6Benzene, [1-(2,4-cyclopentadien-1-NJ, CLP152320-32-3 12/12/21 CLP SFAM01.1 B12/14/21ug/L20Benzene, 1,2,3-trimethyl-NJ, CLP15526-73-8 12/12/21 CLP SFAM01.1 B12/14/21ug/L30Benzene, 1,2,4-trimethyl-NJ, CLP1595-63-6 12/12/21 CLP SFAM01.1 B12/14/21ug/L9Benzene, 1-ethyl-2,4-dimethyl-NJ, CLP15874-41-9 1/28/22 14:23C215303 SVOA FINAL 01 28 22 1423Page 16 of 21 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Jeffrey Wilmoth Semi Volatile Organics Sample ID:Lab ID: MW-58 C215303-05 Matrix:Groundwater Date Collected:12/7/21 16:26 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT2 CHM MD No: BLT2 CHM Station ID:MW-58 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method Tentatively Identified Compounds: 12/12/21 CLP SFAM01.1 B12/14/21ug/L60Benzene, 1-ethyl-2-methyl-NJ, CLP15611-14-3 12/12/21 CLP SFAM01.1 B12/14/21ug/L80Benzene, 1-propynyl-NJ, CLP15673-32-5 12/12/21 CLP SFAM01.1 B12/14/21ug/L30Benzofuran, 2-methyl-NJ, CLP154265-25-2 12/12/21 CLP SFAM01.1 B12/14/21ug/L10DibenzothiopheneNJ, CLP15132-65-0 12/12/21 CLP SFAM01.1 B12/14/21ug/L8DiphenylmethaneNJ, CLP15101-81-5 12/12/21 CLP SFAM01.1 B12/14/21ug/L9d-Limonene NJ, CLP155989-27-5 12/12/21 CLP SFAM01.1 B12/14/21ug/L10FenchoneNJ, CLP151195-79-5 12/12/21 CLP SFAM01.1 B12/14/21ug/L200IndaneNJ, CLP15496-11-7 12/12/21 CLP SFAM01.1 B12/14/21ug/L70Naphthalene, 1,3-dimethyl-NJ, CLP15575-41-7 12/12/21 CLP SFAM01.1 B12/14/21ug/L6Naphthalene, 1,6-dimethyl-NJ, CLP15575-43-9 12/12/21 CLP SFAM01.1 B12/14/21ug/L70Naphthalene, 1,7-dimethyl-NJ, CLP15575-37-1 12/12/21 CLP SFAM01.1 B12/14/21ug/L20Naphthalene, 2,6-dimethyl-NJ, CLP15581-42-0 12/12/21 CLP SFAM01.1 B12/14/21ug/L40Naphthalene, 2-ethyl-NJ, CLP15939-27-5 12/12/21 CLP SFAM01.1 B12/14/21ug/L40Naphthalic anhydride NJ, CLP1581-84-5 12/12/21 CLP SFAM01.1 B12/14/21ug/L6Quinoline, 4-methyl-NJ, CLP15491-35-0 1/28/22 14:23C215303 SVOA FINAL 01 28 22 1423Page 17 of 21 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Jeffrey Wilmoth Semi Volatile Organics Sample ID:Lab ID: MW-6 C215303-07 Matrix:Groundwater Date Collected:12/7/21 14:18 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT3 CHM MD No: BLT3 CHM Station ID:MW-6 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 10 12/12/21(3-and/or 4-)Methylphenol ug/L 12/14/21 CLP SFAM01.1 B10U1319-77-3 50 12/12/211,1-Biphenyl ug/L 12/16/21 CLP SFAM01.1 B11092-52-4 5.0 12/12/211,2,4,5-Tetrachlorobenzene ug/L 12/14/21 CLP SFAM01.1 B5.0 U, J, QS-395-94-3 2.0 12/12/211,4-Dioxane ug/L 12/14/21 CLP SFAM01.1 B2.0 U123-91-1 50 12/12/211-Methylnaphthalene ug/L 12/16/21 CLP SFAM01.1 B37090-12-0 5.0 12/12/212,3,4,6-Tetrachlorophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U, J, QS-358-90-2 5.0 12/12/212,4,5-Trichlorophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U, J, QS-395-95-4 5.0 12/12/212,4,6-Trichlorophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U, J, QS-388-06-2 5.0 12/12/212,4-Dichlorophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U, J, QS-3120-83-2 5.0 12/12/212,4-Dimethylphenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U105-67-9 10 12/12/212,4-Dinitrophenol ug/L 12/14/21 CLP SFAM01.1 B10U51-28-5 5.0 12/12/212,4-Dinitrotoluene ug/L 12/14/21 CLP SFAM01.1 B5.0 U121-14-2 5.0 12/12/212,6-Dinitrotoluene ug/L 12/14/21 CLP SFAM01.1 B5.0 U606-20-2 5.0 12/12/212-Chloronaphthalene ug/L 12/14/21 CLP SFAM01.1 B5.0 U91-58-7 5.0 12/12/212-Chlorophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U95-57-8 10 12/12/212-Methyl-4,6-dinitrophenol ug/L 12/14/21 CLP SFAM01.1 B10U534-52-1 50 12/12/212-Methylnaphthalene ug/L 12/16/21 CLP SFAM01.1 B80091-57-6 10 12/12/212-Methylphenol ug/L 12/14/21 CLP SFAM01.1 B10U95-48-7 5.0 12/12/212-Nitroaniline ug/L 12/14/21 CLP SFAM01.1 B5.0 U88-74-4 5.0 12/12/212-Nitrophenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U88-75-5 10 12/12/213,3'-Dichlorobenzidine ug/L 12/14/21 CLP SFAM01.1 B10U91-94-1 10 12/12/213-Nitroaniline ug/L 12/14/21 CLP SFAM01.1 B10U99-09-2 5.0 12/12/214-Bromophenyl phenyl ether ug/L 12/14/21 CLP SFAM01.1 B5.0 U101-55-3 5.0 12/12/214-Chloro-3-methylphenol ug/L 12/14/21 CLP SFAM01.1 B5.0 U, J, QS-359-50-7 10 12/12/214-Chloroaniline ug/L 12/14/21 CLP SFAM01.1 B10U106-47-8 5.0 12/12/214-Chlorophenyl phenyl ether ug/L 12/14/21 CLP SFAM01.1 B5.0 U7005-72-3 10 12/12/214-Nitroaniline ug/L 12/14/21 CLP SFAM01.1 B10U100-01-6 10 12/12/214-Nitrophenol ug/L 12/14/21 CLP SFAM01.1 B10U100-02-7 1/28/22 14:23C215303 SVOA FINAL 01 28 22 1423Page 18 of 21 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Jeffrey Wilmoth Semi Volatile Organics Sample ID:Lab ID: MW-6 C215303-07 Matrix:Groundwater Date Collected:12/7/21 14:18 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT3 CHM MD No: BLT3 CHM Station ID:MW-6 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 50 12/12/21Acenaphtheneug/L 12/16/21 CLP SFAM01.1 B21083-32-9 5.0 12/12/21Acenaphthyleneug/L 12/14/21 CLP SFAM01.1 B12208-96-8 10 12/12/21Acetophenoneug/L 12/14/21 CLP SFAM01.1 B2.6 J, CLP0198-86-2 5.0 12/12/21Anthraceneug/L 12/14/21 CLP SFAM01.1 B7.2120-12-7 10 12/12/21Atrazineug/L 12/14/21 CLP SFAM01.1 B10U1912-24-9 10 12/12/21Benzaldehydeug/L 12/14/21 CLP SFAM01.1 B10U, J, CLP16, QC-3 100-52-7 5.0 12/12/21Benzo(a)anthracene ug/L 12/14/21 CLP SFAM01.1 B5.0 U56-55-3 5.0 12/12/21Benzo(a)pyrene ug/L 12/14/21 CLP SFAM01.1 B5.0 U50-32-8 5.0 12/12/21Benzo(b)fluoranthene ug/L 12/14/21 CLP SFAM01.1 B5.0 U205-99-2 5.0 12/12/21Benzo(g,h,i)perylene ug/L 12/14/21 CLP SFAM01.1 B5.0 U191-24-2 5.0 12/12/21Benzo(k)fluoranthene ug/L 12/14/21 CLP SFAM01.1 B5.0 U207-08-9 5.0 12/12/21Benzyl butyl phthalate ug/L 12/14/21 CLP SFAM01.1 B5.0 U85-68-7 10 12/12/21Bis(2-chloro-1-methylethyl) ether ug/L 12/14/21 CLP SFAM01.1 B10U108-60-1 5.0 12/12/21Bis(2-chloroethoxy)methane ug/L 12/14/21 CLP SFAM01.1 B5.0 U111-91-1 10 12/12/21bis(2-Chloroethyl) Ether ug/L 12/14/21 CLP SFAM01.1 B10U111-44-4 5.0 12/12/21Bis(2-ethylhexyl) phthalate ug/L 12/14/21 CLP SFAM01.1 B5.0 U117-81-7 10 12/12/21Caprolactamug/L 12/14/21 CLP SFAM01.1 B10U105-60-2 100 12/12/21Carbazoleug/L 12/16/21 CLP SFAM01.1 B20086-74-8 5.0 12/12/21Chryseneug/L 12/14/21 CLP SFAM01.1 B5.0 U218-01-9 5.0 12/12/21Dibenzo(a,h)anthracene ug/L 12/14/21 CLP SFAM01.1 B5.0 U53-70-3 50 12/12/21Dibenzofuranug/L 12/16/21 CLP SFAM01.1 B240132-64-9 5.0 12/12/21Diethyl phthalate ug/L 12/14/21 CLP SFAM01.1 B5.0 U84-66-2 5.0 12/12/21Dimethyl phthalate ug/L 12/14/21 CLP SFAM01.1 B5.0 U131-11-3 5.0 12/12/21Di-n-butylphthalate ug/L 12/14/21 CLP SFAM01.1 B5.0 U84-74-2 10 12/12/21Di-n-octylphthalate ug/L 12/14/21 CLP SFAM01.1 B10U117-84-0 5.0 12/12/21Fluorantheneug/L 12/14/21 CLP SFAM01.1 B8.8206-44-0 50 12/12/21Fluoreneug/L 12/16/21 CLP SFAM01.1 B14086-73-7 5.0 12/12/21Hexachlorobenzene (HCB)ug/L 12/14/21 CLP SFAM01.1 B5.0 U118-74-1 1/28/22 14:23C215303 SVOA FINAL 01 28 22 1423Page 19 of 21 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Jeffrey Wilmoth Semi Volatile Organics Sample ID:Lab ID: MW-6 C215303-07 Matrix:Groundwater Date Collected:12/7/21 14:18 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT3 CHM MD No: BLT3 CHM Station ID:MW-6 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method 5.0 12/12/21Hexachlorobutadieneug/L 12/14/21 CLP SFAM01.1 B5.0 U, J, QS-387-68-3 10 12/12/21Hexachlorocyclopentadiene (HCCP)ug/L 12/14/21 CLP SFAM01.1 B10U77-47-4 5.0 12/12/21Hexachloroethaneug/L 12/14/21 CLP SFAM01.1 B5.0 U67-72-1 5.0 12/12/21Indeno (1,2,3-cd) pyrene ug/L 12/14/21 CLP SFAM01.1 B5.0 U193-39-5 5.0 12/12/21Isophoroneug/L 12/14/21 CLP SFAM01.1 B5.0 U78-59-1 1300 12/12/21Naphthaleneug/L 12/17/21 CLP SFAM01.1 B1400091-20-3 5.0 12/12/21Nitrobenzeneug/L 12/14/21 CLP SFAM01.1 B5.0 U98-95-3 5.0 12/12/21n-Nitroso di-n-Propylamine ug/L 12/14/21 CLP SFAM01.1 B5.0 U621-64-7 5.0 12/12/21n-Nitrosodiphenylamine/Diphenylamine ug/L 12/14/21 CLP SFAM01.1 B5.0 U122-39-4 10 12/12/21Pentachlorophenolug/L 12/14/21 CLP SFAM01.1 B10U, J, QS-387-86-5 50 12/12/21Phenanthreneug/L 12/16/21 CLP SFAM01.1 B10085-01-8 10 12/12/21Phenolug/L 12/14/21 CLP SFAM01.1 B10U108-95-2 5.0 12/12/21Pyreneug/L 12/14/21 CLP SFAM01.1 B4.7 J, CLP01129-00-0 Tentatively Identified Compounds: 12/12/21 CLP SFAM01.1 B12/14/21ug/L20[1,1-Biphenyl]-4-carboxaldehyde NJ, CLP153218-36-8 12/12/21 CLP SFAM01.1 B12/14/21ug/L801(2H)-Isoquinolinone NJ, CLP15491-30-5 12/12/21 CLP SFAM01.1 B12/14/21ug/L1001-Acenaphthenol NJ, CLP156306-07-6 12/12/21 CLP SFAM01.1 B12/14/21ug/L302-Propanol, 1-(2-methoxy-1-methyle NJ, CLP1520324-32-7 12/12/21 CLP SFAM01.1 B12/14/21ug/L702-Propanol, 1-butoxy-NJ, CLP155131-66-8 12/12/21 CLP SFAM01.1 B12/14/21ug/L203-Acridinol NJ, CLP157132-70-9 12/12/21 CLP SFAM01.1 B12/14/21ug/L109,10-Anthracenedione NJ, CLP1584-65-1 12/12/21 CLP SFAM01.1 B12/14/21ug/L409H-Fluoren-9-one NJ, CLP15486-25-9 12/12/21 CLP SFAM01.1 B12/14/21ug/L40Benzene, 1,2,3-trimethyl-NJ, CLP15526-73-8 12/12/21 CLP SFAM01.1 B12/14/21ug/L50Benzene, 1,3-dimethyl-NJ, CLP15108-38-3 12/12/21 CLP SFAM01.1 B12/14/21ug/L40Benzene, 1-ethyl-2-methyl-NJ, CLP15611-14-3 12/12/21 CLP SFAM01.1 B12/14/21ug/L20Benzenepropanal, 2-oxo-NJ, CLP1556485-04-2 12/12/21 CLP SFAM01.1 B12/14/21ug/L10BenzofuranNJ, CLP15271-89-6 12/12/21 CLP SFAM01.1 B12/14/21ug/L70Benzofuran, 2-methyl-NJ, CLP154265-25-2 12/12/21 CLP SFAM01.1 B12/14/21ug/L20DibenzothiopheneNJ, CLP15132-65-0 1/28/22 14:23C215303 SVOA FINAL 01 28 22 1423Page 20 of 21 D.A.R.T. Id: 22-0052 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Laboratory Services and Applied Science Division 980 College Station Road, Athens, Georgia 30605-2700 Project: 22-0052, Holcomb Creosote - Reported by Jeffrey Wilmoth Semi Volatile Organics Sample ID:Lab ID: MW-6 C215303-07 Matrix:Groundwater Date Collected:12/7/21 14:18 Project: 22-0052, Holcomb Creosote Contract Lab Case: 49842 D No: BLT3 CHM MD No: BLT3 CHM Station ID:MW-6 CAS Number Analyte Results Qualifiers Units MRL Prepared Analyzed Method Tentatively Identified Compounds: 12/12/21 CLP SFAM01.1 B12/14/21ug/L60Dipropylene glycol (isomer 3)NJ, CLP151000506-25-5 12/12/21 CLP SFAM01.1 B12/14/21ug/L20d-Limonene NJ, CLP155989-27-5 12/12/21 CLP SFAM01.1 B12/14/21ug/L30EthylbenzeneNJ, CLP15100-41-4 12/12/21 CLP SFAM01.1 B12/14/21ug/L30FenchoneNJ, CLP151195-79-5 12/12/21 CLP SFAM01.1 B12/14/21ug/L400IndaneNJ, CLP15496-11-7 12/12/21 CLP SFAM01.1 B12/14/21ug/L1000IndeneNJ, CLP1595-13-6 12/12/21 CLP SFAM01.1 B12/14/21ug/L100MesityleneNJ, CLP15108-67-8 12/12/21 CLP SFAM01.1 B12/14/21ug/L20Naphthalene, 1,3-dimethyl-NJ, CLP15575-41-7 12/12/21 CLP SFAM01.1 B12/14/21ug/L30Naphthalene, 1,7-dimethyl-NJ, CLP15575-37-1 12/12/21 CLP SFAM01.1 B12/14/21ug/L50Naphthalene, 2,3-dimethyl-NJ, CLP15581-40-8 12/12/21 CLP SFAM01.1 B12/14/21ug/L40Naphthalene, 2-ethyl-NJ, CLP15939-27-5 12/12/21 CLP SFAM01.1 B12/14/21ug/L40Naphthalic anhydride NJ, CLP1581-84-5 12/12/21 CLP SFAM01.1 B12/14/21ug/L80o-Xylene NJ, CLP1595-47-6 12/12/21 CLP SFAM01.1 B12/14/21ug/L80p-Cymene NJ, CLP1599-87-6 12/12/21 CLP SFAM01.1 B12/14/21ug/L10Quinoline, 4-methyl-NJ, CLP15491-35-0 1/28/22 14:23C215303 SVOA FINAL 01 28 22 1423Page 21 of 21