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HomeMy WebLinkAboutFA-3898_29796_CA_CAP_20230421 100 East Ruffin Street, Mebane, North Carolina 27302 Telephone (919) 563-9091 ·Facsimile (919) 563-9095 www.terraquestpc.com CORRECTIVE ACTION PERFORMANCE REPORT (February, March, April 2023) POCO SHOP #1 97 N. FAYETTEVILLE STREET PARKTON, ROBESON COUNTY, NORTH CAROLINA 28371 Latitude: 34.902626o N Longitude: 79.01051o W Release Information: Date Discovered: 11/20/2012 (Lab Confirmed) Estimated Release Quantity: Unknown Release Cause/Source: Commercial Underground Storage Tanks UST Capacities: (3) 6,000-gallon gasoline USTs NCDWM-UST Incident No. 29796 NCDWM-UST Risk Ranking: HIGH (H-225-A) Facility ID No.: 0-021993 Responsible Party: Property Owner: Parnell Oil Company, Inc. Alhobishi Convenience Stores & Rentals c/o Dave Parnell c/o Fadhl Alhobishi (910) 583-7565 (919) 412-9252 alhobishifadhl@yahoo.com 2307 Byrd Street Abdu Alhobishi (910) 258-3823 Raleigh, NC 27608-1411 97 N. Fayetteville St Parkton, NC 28371 Terraquest Project No. 07512 April 21, 2023 Corrective Action Performance Report (2/3/4-2023) Parnell Oil Company, Inc. By: Terraquest Environmental Consultants, P.C. POCO Shop #1 Report Prepared: April 21, 2023 i 97 Fayetteville St, Parkton, Robeson County, NC TABLE OF CONTENTS ENVIRONMENTAL ACRONYMS...................................................................................................................... ii EXECUTIVE SUMMARY ................................................................................................................................. iii 1.0 INTRODUCTION ................................................................................................................................ 1 2.0 SITE HISTORY AND CHARACTERIZATION .......................................................................................... 1 3.0 FREE PRODUCT ............................................................................................................................... 10 4.0 SOIL REMEDIATION ........................................................................................................................ 10 5.0 GROUNDWATER ASSESSMENT AND REMEDIATION ...................................................................... 15 6.0 CONCLUSIONS ................................................................................................................................ 16 7.0 LIMITATIONS .................................................................................................................................. 17 REFERENCE .................................................................................................................................................. 18 CERTIFICATION ............................................................................................................................................ 19 TABLES: 1. Site History (UST System Information) 2. Surrounding Property Owners 3. Water Supply Well Information 4. Summary of Soil Sampling Results 5. Monitoring Well Construction Information 6. Summary of Air Sampling Results 7. Summary of Groundwater Sampling Results FIGURES: 1. Site Location Map 2. Site Vicinity Map 3. Site Layout Map 4. Remediation System Layout 5. Potentiometric Surface Map (12/28/22) 6. Soil Sample Location Map (CSA) 7. Groundwater Sampling Results (12/28/22) APPENDICES: A. Technical Methods / Standard Procedures B. Chronological Site History C. Historical Groundwater Data D. Analytical Reports E. Treatment System Inspection Sheets ENVIRONMENTAL ACRONYMS Corrective Action Performance Report (2/3/4-2023) Parnell Oil Company, Inc. By: Terraquest Environmental Consultants, P.C. POCO Shop #1 Report Prepared: April 21, 2023 ii 97 Fayetteville St, Parkton, Robeson County, NC 2L Standard Groundwater Standards Title 15A NCAC 2L 0.0202(g) 2B Standard Surface Water Standards Title 15A NCAC 2B AFVR Aggressive Fluid-Vapor Recovery AST Aboveground Storage Tank BGL Below Ground Level BTEX Benzene, toluene, ethylbenzene, xylenes C&D Construction and Demolition CAP Corrective Action Plan CAPR Corrective Action Performance Report CADR Corrective Action Design Report CSA Comprehensive Site Assessment DPE Dual-phase Extraction EPA Environmental Protection Agency ePATA Electronic Pre-Approval Task Authorization EPH Extractable Petroleum Hydrocarbons ESA Environmental Site Assessment GCL Gross Contamination Level LEL Lower Explosive Limit LSA Limited Site Assessment IPE di-Isopropyl Ether ISCO In-situ Chemical Oxidation MADEP Massachusetts Department of Environmental Protection MDL Method Detection Limit MNA Monitored Natural Attenuation MMPE Mobile Multi Phase Extraction MSCC Maximum Soil Contaminant Concentration MSL Mean Sea Level MSW Municipal Solid Waste MTBE Methyl tertiary-Butyl Ether NC North Carolina NCAC NC Administrative Code NCDENR NC Department of Environment and Natural Resources NCDEQ NC Department of Environmental Quality NCDOT NC Department of Transportation NCDWM-SW NC Division of Waste Management’s Solid Waste Section NCDWM-UST NC Division of Waste Management’s UST Section NCDWQ NC Division of Water Quality NFA No Further Action NORR Notice of Regulatory Requirements NORP Notice of Residual Petroleum NOV Notice of Violation NPDES National Pollutant Discharge Elimination System OVM Organic Vapor Meter PID Photoionization Detector PLC Programmable Logic Controller POE Point of Entry (water treatment system) POTW Publicly Owned Treatment Works RBCA Risk Based Corrective Action RDL Reporting Detection Limit RP Responsible Party SCFM Standard Cubic Feet per Minute SVE Soil Vapor Extraction STF Leaking UST State Trust Fund STG Soil to Groundwater TA Task Authorization TCC Target Cleanup Concentrations Terraquest Terraquest Environmental Consultants, P.C. TPH Total Petroleum Hydrocarbon UVF Ultraviolet Fluorescence UST Underground Storage Tank VOA Volatile Organic Analysis VOC Volatile Organic Compound VPH Volatile Petroleum Hydrocarbons XP Explosion Proof Corrective Action Performance Report (2/3/4-2023) Parnell Oil Company, Inc. By: Terraquest Environmental Consultants, P.C. POCO Shop #1 Report Prepared: April 21, 2023 iii 97 Fayetteville St, Parkton, Robeson County, NC EXECUTIVE SUMMARY On behalf of Parnell Oil Company, Inc, Terraquest Environmental Consultants, P.C. has prepared this Corrective Acton Performance Report for the petroleum UST release incident at the POCO Shop #1 facility located in Parkton, Robeson County, NC. Soil and groundwater remediation continues at the site with the operation of an SVE and air sparge treatment system. Terraquest recommends the continued operation of the system and groundwater monitoring in line with the ROD. Peroxide has been introduced to monitoring well MW10. Sampling in the next quarter will reveal the results of that application and help determine future actions. Corrective Action Performance Report (2/3/4-2023) Parnell Oil Company, Inc. By: Terraquest Environmental Consultants, P.C. POCO Shop #1 Report Prepared: April 21, 2023 1 97 Fayetteville St, Parkton, Robeson County, NC 1.0 INTRODUCTION On behalf of the responsible party, Parnell Oil Company, Inc, Terraquest Environmental Consultants, P.C. has prepared this Corrective Action Performance Report for the POCO Shop #1 facility located in Parkton, Robeson County, NC. The site has been ranked a High Risk H225A by the NCDWM-UST based upon the presence of an active municipal water supply well within 1,000- feet of the source area. Corrective actions at this site include the operation of an onsite soil and groundwater treatment system. This report documents the remediation system operation, maintenance, and performance for the February, March, and April 2023 operating period including the application of peroxide to monitoring well MW10 throughout the period. Activities detailed in this report were pre-approved by the NCDWM-UST on ePATAs 29796-037 and -038. The site’s location, vicinity, and layout are depicted on Figures 1, 2, and 3. The treatment system layout is shown on Figure 4. Terraquest’s technical methods and standard procedures are detailed in Appendix A. 2.0 SITE HISTORY AND CHARACTERIZATION A detailed chronological site history is provided in Appendix B. 1. UST Owner and Tank Information Parnell Oil Company, Inc. purchased the property at 97 N. Fayetteville Street on December 27, 1962. Three 6,000-gallon gasoline USTs were installed on September 26, 1988. A 1,000-gallon kerosene AST is also located at the site. The AST’s installation date is unknown. As of October 22, 2013, this site was sold to RSAP of Raeford, LLC and then to Alhobishi Convenience Stores & Rentals in January 2019. A site history of the USTs and AST located on the site is included as Table 1. Current tank locations are shown on Figure 3. 2. Non-UST Information No non-UST release incident is documented at this site. Corrective Action Performance Report (2/3/4-2023) Parnell Oil Company, Inc. By: Terraquest Environmental Consultants, P.C. POCO Shop #1 Report Prepared: April 21, 2023 2 97 Fayetteville St, Parkton, Robeson County, NC 3. Release Description The release was discovered in November 2012, when Geological Resources, Inc. (GRI) completed a Phase II Environmental Site Assessment. On November 1, 2012, GRI completed field activities as part of a Phase II ESA. Field activities included the advancement of three soil borings and the collection of soil and groundwater samples. Two soil borings were advanced adjacent to the current UST system and a third near the southeastern edge of the current canopy. Analytical results from the collected soil samples revealed TPH concentrations exceeding the then 10 mg/kg action limit in all samples. Each soil boring was advanced into the water table for the collection of a groundwater sample by a discrete sampler. The three groundwater samples (SB-1-GW, SB-2-GW, and SB-3-GW) were submitted for analysis per EPA Method 8260B. Groundwater analytical results revealed 2L Standard violations in all three samples. An UST-61 24-Hour Release and UST Leak Reporting Form was submitted to the NCDWM-UST Fayetteville Regional Office on November 20, 2012, by GRI. No discrete release event has been documented for the USTs at the site. The estimated quantity of petroleum released to the subsurface from the USTs is unknown. 4. Site Characteristics Land use in the vicinity of the site is a mixture of residential, business, and agricultural. The site and surrounding properties are zoned business (PKTB) as shown on Figure 2. The closest residence is located less than 250 feet to the southeast of the site. The closest place of public assembly, excluding restaurants, is the Parkton Baptist Church located approximately 300 feet to the south of the site. The closest school is the Parkton Elementary School located approximately 1,240 feet to the northeast of the site. An aerial view is provided on the following page. Corrective Action Performance Report (2/3/4-2023) Parnell Oil Company, Inc. By: Terraquest Environmental Consultants, P.C. POCO Shop #1 Report Prepared: April 21, 2023 3 97 Fayetteville St, Parkton, Robeson County, NC 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 26.0 27.0 5. Regional and Site Geology and Hydrogeology According to the Geologic Map of North Carolina, the site lies in the Coastal Plain Physiographic province (Brown, et al., 1985). Specifically, the site lies in the Black Creek Formation and is underlain by glauconitic, fossiliferous clayey sand. On a regional scale, the Coastal Plain is characterized by land with little relief. Groundwater in the region is directed southwest towards Dunn’s Marsh and eventually to the Cape Fear River. SITE MUNICIPAL WELL Corrective Action Performance Report (2/3/4-2023) Parnell Oil Company, Inc. By: Terraquest Environmental Consultants, P.C. POCO Shop #1 Report Prepared: April 21, 2023 4 97 Fayetteville St, Parkton, Robeson County, NC The following lithologies were encountered at the site during the installation of soil borings and the monitoring well network: 0' – 16' below ground level (BGL): SANDY FAT CLAY (CH) Mostly medium stiff tan fat clay, with some poorly graded sand. 16’ – 35’ BGL: CLAYEY SAND (SC) to WELL GRADED SAND (SW) Mostly medium dense to dense well graded sand, with tannish/gray clay. The quantity of clay decreases with depth. Generalized subsurface lithologies are shown in the following geologic cross-sections: Corrective Action Performance Report (2/3/4-2023) Parnell Oil Company, Inc. By: Terraquest Environmental Consultants, P.C. POCO Shop #1 Report Prepared: April 21, 2023 5 97 Fayetteville St, Parkton, Robeson County, NC Corrective Action Performance Report (2/3/4-2023) Parnell Oil Company, Inc. By: Terraquest Environmental Consultants, P.C. POCO Shop #1 Report Prepared: April 21, 2023 6 97 Fayetteville St, Parkton, Robeson County, NC Corrective Action Performance Report (2/3/4-2023) Parnell Oil Company, Inc. By: Terraquest Environmental Consultants, P.C. POCO Shop #1 Report Prepared: April 21, 2023 7 97 Fayetteville St, Parkton, Robeson County, NC The local topography is characterized as minor sloping with little relief. The entire area surrounding 1,000 feet of the site is mapped at approximately 185 feet above sea level. Local topography is depicted in Figure 1. The release area is overlain by an asphalt and concrete parking lot. Precipitation with falls on the uncovered portions of the site infiltrates the underlying soils. Excessive runoff and shallow soil drainage is directed toward storm water drains located around the property. Terraquest has searched for any surface water bodies within a 500-foot radius of the site. No surface water bodies were identified within this search area. The nearest surface water body is an unnamed tributary of Dunn’s Marsh located approximately 2,050 feet to the southwest. Figure 2 illustrates the areas surface water bodies. Analysis of the cross sections in a general way reveals that the shallowest lithology is fat clay with sand that extends to a depth of approximately seven feet to seventeen feet where the sandy clay becomes predominantly sand with little clay. Bedrock was not encountered during the installation of monitoring wells. The phreatic aquifer at the site begins approximately 8.5 feet BGL; however, historical data has shown it as shallow as 1.75 feet BGL. Historical groundwater elevation data is provided in Appendix C. Historical groundwater flow at the site decreases to the south, southwest. The most recent groundwater flow map is provided as Figure 5. As part of the CSA, the groundwater elevation measurements reveal that the hydraulic head within the shallow phreatic aquifer ranged from a relative value of approximately 87.26 feet at monitoring well MW2 to 87.03 feet at monitoring well MW10 as measured on November 13, 2013. In conjunction with other site measurements, the results indicate flow in the phreatic aquifer in a southwesterly direction under an average hydraulic gradient of 0.003. Water level data from the Type III monitoring well (MW12) and the interpreted groundwater elevation in the phreatic aquifer in the vicinity of the Type III wells were used to determine if a Corrective Action Performance Report (2/3/4-2023) Parnell Oil Company, Inc. By: Terraquest Environmental Consultants, P.C. POCO Shop #1 Report Prepared: April 21, 2023 8 97 Fayetteville St, Parkton, Robeson County, NC vertical head gradient existed in the phreatic aquifer. The vertical gradient was calculated using the following equation and groundwater elevation data collected on November 13, 2013: Type III monitoring well MW12 where: Vg = Vertical head gradient Hphreatic = Water elevation in the shallow aquifer near MW12 = 87.84’ HMW12 = Water elevation in deep well MW12 = 86.80’ D = The difference in elevation between the shallow water table and the middle of the well screen in MW12 = (87.84’ – 67.04’) = 20.80’ therefore: The head gradient suggests a recharging hydrologic flow gradient meaning groundwater tends to flow in a downward direction. A review of regional topographic maps affirms this belief. With increasing depth and distance from the recharge area, the flow lines flatten out and become more horizontal than vertical. Eventually, as the flow lines near lower elevations, the flow lines curve upward towards the ground surface into areas of discharge such as streams and rivers. 6. Surrounding Property Owners and Occupants Surrounding property owner information is provided in Table 2. 7. Critical Receptors On January 10, 2013, to determine the risk classification of the site, Terraquest personnel performed a reconnaissance of properties within a 1,500-foot radius of the source area. The D=V 12 g hhMWphreatic− 05.0 =20.80' 80'87.84'-86.=Vg + Corrective Action Performance Report (2/3/4-2023) Parnell Oil Company, Inc. By: Terraquest Environmental Consultants, P.C. POCO Shop #1 Report Prepared: April 21, 2023 9 97 Fayetteville St, Parkton, Robeson County, NC reconnaissance effort consisted of obtaining tax department and local zoning information on properties and conducting door-to-door visits of certain properties within 1,500 feet of the source area, in addition to collecting other pertinent information from the appropriate local and state officials. Terraquest personnel inspected all properties within 1,500 feet of the site and attempted to contact all the property owners within 1,000 feet in person. Property owners were questioned, if available, as to the source of their water and if any water supply wells were located on their property. If owners/occupants were not home, a survey form was left at their residence or forwarded to the property owners through the mail. In all cases, Terraquest also conducted a visual survey of the property. A less detailed reconnaissance effort was conducted for properties located 1,000 to 1,500 feet away from the site. Eight water supply wells are located within 1,500 feet of the site. Of those eight, one sole-source water supply well is located within 1,000 feet of the site. This sole-source well is a municipal well owned and operated by the Town of Parkton. A second municipal water supply well is located approximately 1,410 feet from the site and is only used for emergency purposes. The remaining water supply wells are used for irrigational purposes and none are located within 250 feet of the site. The site and surrounding properties obtain water from the Town of Parkton’s municipal water supply well network. The site is located within a wellhead protection area. Water supply well information is presented in Table 3. 8. Summary of CAP Implementation Following pre-approval, pilot testing, CAP Feasibility Report, Corrective Action Design Report, and the Record of Decision, construction for the remediation system began in June 2021. The system was started on August 3, 2021. System performance is detailed in Corrective Action Performance Reports. Corrective Action Performance Report (2/3/4-2023) Parnell Oil Company, Inc. By: Terraquest Environmental Consultants, P.C. POCO Shop #1 Report Prepared: April 21, 2023 10 97 Fayetteville St, Parkton, Robeson County, NC 10. Reporting To date, a Site Check Report, LSA (II), CSA, CAP, Monitoring, and Corrective Action Performance Reports have been submitted for this release incident. 11. Progress of Remediation at the Site Following a lengthy approval process, active remediation was initiated on August 3, 2021 with the activation of a soil vapor extraction (SVE) and air sparge remediation system. The system has been operational since that date. 3.0 FREE PRODUCT No free product was encountered at the site during the recent operating period. Free product has not been detected historically in any of the monitoring wells. 4.0 SOIL REMEDIATION Historical Assessment: On November 1, 2012, Geologic Resources, Inc. completed field activities as part of a Phase II Environmental Site Assessment (ESA). Field activities included the advancement of three soil borings and the collection of soil and groundwater samples. Two soil borings (SB-1 and SB-2) were advanced adjacent to the current UST system. Soil boring SB-3 was advanced near the southeastern edge of the current canopy. One soil sample was collected for analysis from each soil boring: SB-1-8’, SB-2-4’, and SB-3-8’. Analytical results from the collected soil samples revealed Total Petroleum Hydrocarbons as Gasoline Range Organics (TPH-GRO) concentrations exceeding the 10 mg/kg action limit in all samples. TPH-Diesel Range Organics (DRO) concentrations exceeding the 10 mg/kg state action limit were reported in the samples collected from SB-2 and SB-3. Corrective Action Performance Report (2/3/4-2023) Parnell Oil Company, Inc. By: Terraquest Environmental Consultants, P.C. POCO Shop #1 Report Prepared: April 21, 2023 11 97 Fayetteville St, Parkton, Robeson County, NC On January 7, 2013, Terraquest personnel conducted a site check to document soil and water quality at the site. Sixteen soil borings (B1 – B16) were advanced around the current UST system, former product line and former dispensers. Analytical results of the collected soil samples revealed Soil-to-Groundwater Maximum Soil Contaminant Concentrations (STG MSCC) violations at each location. Soil borings B12 and B13 contained Residential – MSCC violations for C5 – C8 aliphatics (1,490 mg/kg and 1,080 mg/kg, respectively) and C9 – C10 aromatics (790 mg/kg and 800 mg/kg, respectively). As part of the CSA, Terraquest personnel supervised the installation of fourteen (14) soil borings (B17 – B30) on November 11, 2013. Soil samples (B17 – B30) were analyzed by EPA Method 8260 along with MADEP VPH. Soil analytical results are summarized in Table 4. The analytical results for the soil sampled collected on November 11, 2013, revealed the following: > Residential MSCCs: None > STG MSCCs: B18, B19, B21 – B23, and B25 – B30 < STG MSCCs: B17, B20, and B24 As shown on Figure 6, the STG MSCC violation plume extends from the current UST basin towards the south and east. Using the average depth-to-water of 6.5 feet BGL (from March 2013) and a contaminated soil thickness of 6.5 feet, Terraquest estimated the appropriate volume of impacted soil to be 2,190 – 2,410 tons. When using the average depth-to-water measurement of 11.5 feet BGL from November 2013, Terraquest estimates an additional 1,690 – 1,860 tons of contaminated soil is located within the capillary fringe. Excavation: Excavation was not conducted during this operating period. Excavation has not been conducted as part of the CAP. Corrective Action Performance Report (2/3/4-2023) Parnell Oil Company, Inc. By: Terraquest Environmental Consultants, P.C. POCO Shop #1 Report Prepared: April 21, 2023 12 97 Fayetteville St, Parkton, Robeson County, NC Installation, activation, operation and maintenance, monitoring, and shutdown of a remedial system (if applicable): In March 2021, Terraquest personnel supervised the installation of remedial wells at the site. Those wells include SVE wells SVE2-SVE10 and air sparge wells AS1-AS6. Note that SVE well SVE1 was installed as part of pilot testing and was incorporated into the system as an SVE well. Also, monitoring well MW12, a Type III well, was previously installed and was incorporated into the system as an air sparge point in the deeper aquifer. Monitoring well MWC, a pilot test well, was incorporated as a shallow air sparge well. Air sparge wells were installed as a nested pair of deeper and shallow sparge points with AS1 and AS2 together, MW12 and MWC together, AS3 and AS4 together, and AS5 and AS6 together. Well construction is outlined on Table 5. The well locations are shown on Figure 3 and 4. Installation of the SVE and air sparge system began in June 2021 and was conducted by Dynamic Engineering Solutions, PC. of Charlotte, NC. The system equipment was provided by Zava Industrial, Inc. of Graham, NC. System installation and equipment pictures are as follows: Corrective Action Performance Report (2/3/4-2023) Parnell Oil Company, Inc. By: Terraquest Environmental Consultants, P.C. POCO Shop #1 Report Prepared: April 21, 2023 13 97 Fayetteville St, Parkton, Robeson County, NC Corrective Action Performance Report (2/3/4-2023) Parnell Oil Company, Inc. By: Terraquest Environmental Consultants, P.C. POCO Shop #1 Report Prepared: April 21, 2023 14 97 Fayetteville St, Parkton, Robeson County, NC Volume and extent of soil contamination: The volume and extent of soil contamination was previously discussed. The approved Record of Decision (ROD) calculated a soil contaminant mass of 1,606 kg. Soil treatment system radius of influence: Radius of influence or capture zone of the system was estimated at fifteen feet in the CAP based on pilot testing. There are no active gauges or other measures present to tell if the ROI has deviated from that estimate during the recent period. Contaminant mass removal: A partial look at soil quality was assessed during the recent period by sampling the active SVE system’s exhaust stack in February, March, and April 2023. The results of those sampling efforts, presented on Table 6, did not show any petroleum-type compounds above the laboratory’s reporting limit. However, as the SVE system protects the onsite building from vapor entry, continued operation is recommended. The system ran well throughout the latest quarter as detailed in Appendix E that also lists flow rates and pressures for the soil remediation system. System operation and maintenance was conducted once per month. Maintenance activities followed the manufacturer’s recommendations as possible with cost reductions from the NC Leaking UST Trust Fund. A chronological history of site activities is provided in Appendix B. No permits were issued or required for soil remediation during this period. During the February, March, and April 2023 operating period, costs for soil and groundwater remediation during the reporting period were pre-approved on ePATA 29796-037 that authorized $4,965 toward system maintenance, parts, and operating costs. Corrective Action Performance Report (2/3/4-2023) Parnell Oil Company, Inc. By: Terraquest Environmental Consultants, P.C. POCO Shop #1 Report Prepared: April 21, 2023 15 97 Fayetteville St, Parkton, Robeson County, NC 5.0 GROUNDWATER ASSESMENT AND REMEDIATION Assessment: As part of the most recent efforts, Terraquest sampled monitoring wells MW1-4, MW9-14, MW16-22, MWB, and MWC on December 28, 2022 following technical methods and standard procedures in Appendix A. The samples were submitted for VOC analysis per method 6200B + 5 oxygenates. As shown on Table 8, petroleum type compounds were reported for multiple wells. Monitoring well MW10 had a benzene concentration reported above the Record of Decision-directed Target Cleanup Concentration (ROD TCC) and the GCL. No other TCC or GCL violations were reported. Monitoring wells both on and offsite (MW13) had 2L Standard violations. The estimated extent of TCC and GCL violations is limited to a small area around monitoring well MW10. The 2L Standard plume is estimated to have decreased from a size of 27,000 square feet in June 2022 to a current area of 13,500 square feet. The decrease is due to the drop in contaminant concentrations in monitoring wells MW1, MW3, MW4, MW9, MW13 and MWB. Note that this is the first time since sampling began for this release incident that monitoring well MWB has not had a 2L Standard violation and the second absence of violation for monitoring well MW3. Monitoring well MWC only had one compound, MTBE, with a 2L Standard violation. Also note that the Type III well MW12 is absent 2L Standard violations for the third sampling in a row. Remediation appears to be working well. The data is summarized on Figure 7. The Town Well #1 was not sampled as part of this monitoring event as its pump was down for repairs. Terraquest recommends continuing to sample this well when it is back online. Historical groundwater analytical data, including graphs, is provided in Appendix C. The analytical report is provided in Appendix D. Note from the graphs in Appendix C that contaminant concentrations do not appear to correlate with the water table. That is, at a similar water table elevation, the March 2017 benzene Corrective Action Performance Report (2/3/4-2023) Parnell Oil Company, Inc. By: Terraquest Environmental Consultants, P.C. POCO Shop #1 Report Prepared: April 21, 2023 16 97 Fayetteville St, Parkton, Robeson County, NC concentrations for the core wells MW1 and MW3 were 21,400 ug/L and 11,300 ug/l and in March 2022 they were 1.36 ug/L and 1.4 ug/L. Remediation is truly taking place and the reduction is not just due to water table fluctuations. Remediation: The approved and implemented Corrective Action Plan uses four sets of nested shallow and deep air sparge wells to remediate the onsite aquifer. During the installation process, underground piping was installed to connect the wells with a rotary screw air compressor. Flow rates and pressures for the groundwater remediation system are detailed on the inspection sheets in Appendix E. System operation and maintenance was conducted once per month. Maintenance activities followed the manufacturer’s recommendations as possible with cost reductions from the NC Leaking UST Trust Fund. A chronological history of site activities is provided in Appendix B. No permits were issued or required for soil remediation during this period. The system generally ran well. As approved on ePATA 29796-038, and as previously reported to the NCDWM-UST, Terraquest applied 15 gallons of peroxide to monitoring well MW10 during the February, March, and April 2023 site visits. That well appears to be outside the reach of the air sparge wells. The application of peroxide is meant to treat dissolved-phase contamination so the site can move toward closure. If the peroxide is not effective, another sparge well may be required in the monitoring well MW10 area. 6.0 CONCLUSIONS Soil and groundwater remediation continues at the site with the operation of an SVE and air sparge treatment system. Terraquest recommends the continued operation of the system and groundwater monitoring per the ROD. As contaminant concentrations in monitoring well MW10 are not decreasing at the same rate as other wells at the site, Terraquest has applied peroxide to Corrective Action Performance Report (2/3/4-2023) Parnell Oil Company, Inc. By: Terraquest Environmental Consultants, P.C. POCO Shop #1 Report Prepared: April 21, 2023 17 97 Fayetteville St, Parkton, Robeson County, NC that well. Groundwater sampling during the next quarter is needed to determine the effects of the peroxide and determine the future course of actions. 7.0 LIMITATIONS This report is limited to the investigation of petroleum-type compounds and does not imply that other unforeseen adverse impacts to the environment are not present at the facility. In addition, subsurface heterogeneities not identified during the current study may influence the migration of groundwater or contaminants in unpredicted ways. The limited amount of sampling and testing conducted during this study cannot practically reveal all subsurface heterogeneities. Furthermore, the subsurface conditions, particularly groundwater flow, elevations, and water quality may very through time. The opinions and conclusions arrived at in this report are in accordance with industry-accepted geologic and hydrogeologic practices at this time and location. No warranty is implied or intended. Corrective Action Performance Report (2/3/4-2023) Parnell Oil Company, Inc. By: Terraquest Environmental Consultants, P.C. POCO Shop #1 Report Prepared: April 21, 2023 18 97 Fayetteville St, Parkton, Robeson County, NC REFERENCE Brown, et al., 1985. Geologic Map of North Carolina, North Carolina. Department of Natural Resources and Community Development, 1:500,000 scale. Corrective Action Performance Report (2/3/4-2023) Parnell Oil Company, Inc. By: Terraquest Environmental Consultants, P.C. POCO Shop #1 Report Prepared: April 21, 2023 19 97 Fayetteville St, Parkton, Robeson County, NC CERTIFICATION 1 Enter the date the monitoring report was due: 5/31/2023 Will this report be submitted after the established due date? YES NO X 2 Was any required information from the above template missing from this report? YES NO X IF the answer to question #1 or# 2 is “YES”, please provide additional information in this cell to explain what was missing and why. 3 If applicable, will any of the proposed attenuation milestones under the schedule approved in the Corrective Action Plan not be met? (within a reasonable margin of error) YES NO X IF the answer to question #3 is “NO”, skip to the certification under #8 below. IF the answer to question #3 is “YES”, please generally describe in this cell the possible reason(s) and outline proposed remedies. (This should be described in more detail in the report text above.) 4 Does any known or suspected source zone soil contamination or free product remain outside of the assessed area that could be inhibiting natural attenuation? YES NO 5 Has there been an unexpected increase in contaminant mass sufficient to suggest a potential new release from a separate onsite or offsite source? YES NO IF the answer to either question #4 or #5 is “YES”, generally describe in this cell any actions recommended to further assess or clean up this known or suspected source. (This should be described in more detail in the report text above.) 6 Certification: I, Michael J. Brown, a Licensed Geologist and I, John S. Haselow, a Licensed Engineer in the State of North Carolina for TERRAQUEST ENVIRONMENTAL CONSULTANTS, P.C. do certify that the information contained in this report is correct and accurate to the best of my knowledge. All work was performed under my direct supervision. My seal and signature are affixed below. Additional seals and/or signatures are also listed. Terraquest Environmental Consultants, P.C. is licensed to practice geology and engineering in North Carolina. The geology certification number of the corporation is C-291. The engineering certification number of the corporation is C-4634. Engineering is practiced out of the Cary, NC office. TERRAQUEST ENVIRONMENTAL CONSULTANTS, P.C. Ryan D. Kerins Michael J. Brown, P.G. John Haselow, PhD, PE Project Manager President Senior Engineer TABLES Table 1 Date: 4/21/23 Facility ID No: 0-021993 Capacity UST Product (Gallons)Dimensions Release Discovered T1 Gasoline 6,000 8' x 16'9/26/88 -Yes T2 Gasoline 6,000 8' x 16'9/26/88 -Yes T3 Gasoline 6,000 8' x 16'9/26/88 -Yes AST1 Kerosene 1,000 48" x 129"unknown -No Notes: 1. Information obtained from the North Carolina UST Database Records and field observations. 2. T = UST 3. All tanks are of single walled steel construction. 4. Tank tightness report submitted by Charles Broadfoot Associated, Inc. indicates the installation date as 3/15/1987, and upgrade date as 2/15/1994. SITE HISTORY (UST and AST SYSTEM INFORMATION) Incident Name: POCO Shop #1 Incident No. 29796 Date Installed Date Closed Table 2 Date: 4/21/23 Facility ID No: 0-021993 Tax Parcel Number (PIN Number)Property Owner Property Owner Address Property Address 949169869100 Granville Jackson c/o William Jackson Fayetteville Street Mary Evelyn Jackson 4923 Cypress Rd Parkton, NC 28371 Fayetteville, NC 28304000 949179055500 Harace W. Parnell 128 Legacy Trail Drive 204 Fayetteville Street Geneva E Parnell La Verina, TX 78121 Parkton, NC 28371 949169948000 Berline Bulla Bodenheimer 1582 Blue Road 202 Fayetteville Street Dorothy McNeil Bodenheimer Parkton, NC 28371 Parkton, NC 28371 949169812500 Parkton Baptist Church Ist & Fayetteville Street 28 Fayetteville Street Parkton, NC 28371 Parkton, NC 28371 949169547300 COLE FD PORTFOLIO VIII, LLC 10301 Monroe Rd 52 E. David Parnell Street Matthews, NC 28105 Parkton, NC 28371 949169850200 Roger Hall Jr 1/3 INT &118 Bayshore Dr David Parnell Street Elise McIntosh 1/3 INT &Parkton, NC 28371 Parkton, NC 28371 Sally H Overton 1/3 INT 949169525541 Chazen Wolfe, LLC 104 Tiburon Blvd., Suite 100 29 S. Fayetteville Street Mill Valley, CA 94941-2431 Parkton, NC 28371 949169844900 Alhobishi Convenience Stores & Rentals 7509 Phillipi Church Road 97 N. Fayetteville Street c/o Fadhl Alhobishi (910) 583-7565 Raeford, NC 28376 Parkton, NC 28371 alhobishifadhl@yahoo.com Abdu Alhobishi (910) 258-3823 Notes: 1. Information gathered from field interviews and Robeson County GIS Online. 2. Last 4 digits of MAP ID numbers correspond with those displayed on Figure 2. SURROUNDING PROPERTY OWNERS Incident Name: POCO Shop #1 Incident No. 29796 SITE Table 3 Date: 4/21/23 Facility ID No: 0-021993 Well Depth Type Casing Depth Screen Interval Distance from Source Well ID No. Well Owner/Address Well Address Well Use (feet BGS)of Well (feet BGS)(feet BGS)Area of Release (feet) Town of Parkton Well #1 PO Box 55 Ist Street Municipal 142 Drilled 0-70 70-100 700 Parkton, NC 28371 Parkton, NC 28371 100-113 113-125 Town of Parkton Well #4 PO Box 55 Poplar Street Municipal 148 Drilled 0-90 90-125 1,410 Parkton, NC 28371 Parkton, NC 28371 Emergency Use Only 125-135 135-140 Debra Towery PW1 PO Box 272 247 Second Street Irrigation Unknown Drilled Unknown Unknown 888 Parkton, NC 28371 Parkton, NC 28371 Terry A. Powell PW2 248 E. David Parnell Street 248 E. David Parnell Street Irrigation Unknown Drilled Unknown Unknown 1,013 Parkton, NC 28371 Parkton, NC 28371 William W. Proctor PW3 PO Box 176 170 S. Fayetteville Street Irrigation Unknown Drilled Unknown Unknown 1,302 Parkton, NC 28371 Parkton, NC 28371 Proctor Brothers Nursery PW4 PO Box 143 170 S. Fayetteville Street Irrigation Unknown Drilled Unknown Unknown 1,531 Parkton, NC 28371 Parkton, NC 28371 Carolyn Hughes PW5 PO Box 126 201 Third Street Irrigation Unknown Drilled Unknown Unknown 1,021 Parkton, NC 28371 Parkton, NC 28371 Thomas H. Lanier PW6 282 N. Fayetteville Street 282 N. Fayetteville Street Irrigation Unknown Drilled Unknown Unknown 1,060 Parkton, NC 28371 Parkton, NC 28371 James McCarty PW7 PO Box 343 308 N. Fayetteville Street Irrigation Unknown Drilled Unknown Unknown 1,142 Parkton, NC 28371 Parkton, NC 28371 Notes: 1. "BGS" = feet below ground surface, "NA" = not applicable. 2. Information obtained from Terraquest field interviews and Robeson County GIS. 3. Well ID numbers are displayed on Figure 2. WATER SUPPLY WELL INFORMATION Incident Name: POCO Shop #1 Incident No. 29796 8260B8260B8260B8260B8260B8260B8260B8260B8260B8260B8260B8260B8260B8260B8260B8260B8260B8260B8260BMADEP VPHMADEP VPHMADEP VPHDate Collected Sample Depth B1 1/7/13 5.5 - 6 0.17 2.83 11 34.5 <0.056 <0.058 <1.1 2.58 0.955 <0.067 <0.056 1.83 0.557 <0.28 <0.28 11.2 7.49 50.1 13.3 70.2 51 108B21/7/13 5.5 - 6 0.0319 0.0238 0.0976 0.0663 0.0119 <0.00092 0.0845 0.0047 0.0023 J <0.0011 <0.00089 0.0072 <0.0012 0.0058 J <0.0045 0.0437 0.0341 0.0628 0.0128 2.52 <1.7 <1.7B31/7/13 3 - 5 0.0064 0.0032 J 0.0135 0.0042 J 0.0040 J <0.00092 0.0531 0.0012 J <0.0011 <0.0011 <0.00090 0.0016 J <0.0012 <0.0045 0.0069 J 0.0092 0.0065 0.0112 0.0017 J <1.9 <1.9 <1.9B41/7/13 3 - 5 0.0775 0.0117 0.234 J 0.2625 0.0276 <0.00086 0.0475 0.0191 0.0065 <0.0010 <0.00084 0.0274 0.0035 J <0.0042 <0.0042 0.258 J 0.0956 0.680 0.0807 3.56 <2 5.02 B5 1/7/13 3 - 5 0.0381 0.0039 J 0.0151 0.0381 0.0021 J <0.00087 0.0439 0.0063 0.0023 J <0.0010 <0.00084 0.0067 <0.0011 <0.0042 <0.0042 0.0222 0.0250 0.0048 0.0016 J 2.59 <1.8 <1.8B61/7/13 3 - 5 0.165 0.0540 0.129 0.164 0.131 0.0045 J 0.115 0.0043 J 0.0018 J <0.0011 <0.00091 0.0071 <0.0012 <0.0046 <0.0046 0.0123 0.0227 0.0444 0.0102 5.68 <1.9 1.96B71/7/13 3 - 5 0.389 0.0091 0.646 0.0672 0.817 0.0082 0.0666 0.0077 0.0052 <0.0010 <0.00086 0.0252 <0.0043 <0.0043 <0.0043 0.247 0.291 0.388 0.0272 4.25 <1.9 2.09B81/7/13 3 - 5 0.0404 0.0031 J 0.0691 0.0070 J 0.0062 <0.00098 <0.019 0.0026 J 0.0015 J <0.0011 <0.00095 0.0063 <0.0012 <0.0048 <0.0048 0.0103 0.0182 <0.0010 <0.0011 <1.9 <1.9 <1.9B91/7/13 3 - 5 0.297 0.0188 0.611 0.179 0.0162 <0.00079 <0.015 0.0162 0.0104 <0.00092 <0.00077 0.0411 0.0012 J 0.0102 J <0.0039 0.357 0.124 0.130 0.0188 7.63 <2 5.62B101/7/13 3 - 5 0.0120 0.0034 J 0.0199 0.0072 J 0.0013 J <0.00087 <0.017 0.0012 J 0.0013 J <0.0010 <0.00085 0.0022 J <0.0011 <0.0042 <0.0042 0.0045 0.0075 0.0097 0.0013 J 3 <1.8 <1.8B111/7/13 6 - 8 4.35 35.2 17.6 95.5 0.639 <0.067 <1.3 2.51 0.971 <0.077 <0.065 2.41 0.529 <0.32 <0.32 7.85 9.72 47.6 13.4 469 139 369 B11 1/7/13 15 - 18 2.86 17.7 4.60 22.7 0.880 <0.059 <1.2 0.362 0.142 J <0.069 <0.058 0.484 <0.076 <0.29 <0.29 0.925 1.74 8.10 2.54 73.9 15.3 36.2B121/7/13 8 - 10 4.27 7.31 6.09 22.8 0.262 <0.060 <1.2 0.904 0.300 <0.069 <0.058 0.695 0.186 J <0.29 <0.29 2.51 2.95 14.7 4.98 1,490 251 790B131/7/13 8 - 10 14.2 177 82.3 420 <0.23 <0.24 <4.6 10.2 3.90 <0.27 <0.23 9.79 2.07 <1.1 <1.1 35.2 39.6 192 60.5 1,080 270 800B141/7/13 8 - 10 0.0768 0.0021 J 0.156 0.0050 J 0.0025 J <0.00099 <0.019 0.0024 J 0.0024 J <0.0011 <0.00096 0.0119 <0.0013 <0.0048 <0.0048 0.0169 0.0339 <0.0010 <0.0010 <1.8 <1.8 <1.8 B15 1/7/13 8 - 10 0.0370 0.0027 J 0.0782 0.0040 J <0.00079 <0.00081 <0.016 0.0019 J 0.0014 J <0.00094 <0.00079 0.0066 <0.0010 <0.0040 <0.0040 0.0034 J 0.0183 0.0025 J <0.00083 <1.9 <1.9 <1.9 B16 1/7/13 6 - 8 1.58 0.156 J 4.30 3.68 <0.057 <0.059 <1.1 0.690 0.703 <0.068 0.0692 J 1.71 <0.074 <0.28 <0.28 8.53 3.97 0.230 J 0.555 735 99.8 217 B17 11/11/13 3 - 5 <0.00045 <0.00052 0.00079 J 0.00473 <0.00061 <0.0011 0.030 <0.00078 <0.00058 <0.00074 <0.0010 <0.00067 <0.00071 <0.0029 <0.0020 <0.0012 <0.00069 <0.00064 <0.00072 <0.642 <0.642 <0.214B1811/11/13 3 - 5 0.086 0.014 0.16 0.1876 0.014 <0.0011 0.16 <0.00074 <0.00055 <0.00070 <0.00067 0.011 0.00098 <0.0027 <0.0019 0.052 0.033 0.13 0.023 39.6 84.3 50.8B1911/11/13 3 - 5 0.11 0.0094 0.36 D 0.167665 <0.00064 <0.0012 <0.0064 0.084 0.033 <0.00077 <0.00074 0.083 <0.00074 <0.0030 <0.0021 0.12 0.090 D 0.34 E 0.045 3.96 3.17 1.58B2011/11/13 3 - 5 <0.00041 <0.00047 0.00081 0.002275 <0.00056 <0.0010 0.050 <0.00071 <0.00053 <0.00053 <0.00064 <0.00061 <0.00064 <0.0026 <0.0018 <0.0010 <0.00063 <0.00058 <0.00065 5 4.17 1.67B2111/11/13 3 - 5 0.043 0.0017 0.093 0.04329 0.028 <0.0010 0.14 0.00087 <0.0052 <0.00066 <0.00063 0.0055 <0.00063 <0.0025 0.020 0.00087 0.017 0.028 0.0026 <0.632 <0.632 1.26 B22 11/11/13 3 - 5 0.11 0.020 0.68 D 0.3012 0.059 <0.00096 0.12 <0.00067 <0.00050 <0.00063 <0.00061 0.017 0.0018 <0.0025 0.018 0.081 0.055 1.3 0.069 4.52 5.34 3.70B2311/11/13 3 - 5 0.084 0.018 0.48 D 0.1661 0.11 <0.00088 0.11 <0.00061 <0.00046 <0.00058 <0.00056 0.019 0.0039 <0.0023 0.032 0.070 0.062 1.1 0.61 3.29 3.65 2.56B2411/11/13 3 - 5 <0.00046 <0.00053 0.0018 0.002421 J 0.0054 <0.0011 0.16 <0.00079 <0.00059 <0.00075 <0.00072 <0.00068 <0.00072 0.011 0.015 0.010 0.0011 0.0045 <0.00073 <0.745 <0.745 <0.248B2511/11/13 3 - 5 0.010 0.0046 0.0087 0.00903 0.0023 <0.0011 0.077 0.0071 0.0029 <0.00074 <0.00072 0.0053 <0.00071 <0.0029 <0.0020 0.058 0.022 0.0026 <0.00073 <0.688 <0.688 1.38B2611/11/13 3 - 5 0.01 0.0018 0.097 0.01246 0.013 0.0066 0.17 0.0016 0.0017 <0.00081 0.00078 0.0079 0.00100 <0.0031 0.026 0.046 0.027 <0.00070 <0.00079 4.38 <0.657 1.31B2711/11/13 3 - 5 0.81 0.0038 0.44 D 0.01201 2.6 0.019 <0.0060 0.0038 0.0026 <0.00072 <0.00070 0.014 <0.00069 <0.0028 <0.0020 0.062 0.039 0.0024 0.0017 4.91 <0.670 1.34B2811/11/13 3 - 5 1.1 0.0077 1 D 0.02658 1.7 0.0094 <0.0060 0.0066 0.0042 <0.00073 <0.00070 0.023 <0.00070 <0.0028 <0.0020 0.048 0.068 0.014 0.0029 6.06 <0.650 1.73 B29 11/11/13 3 - 5 0.62 0.0024 0.39 D 0.01294 0.95 0.0064 <0.0056 0.0054 0.0032 <0.00068 <0.00065 0.018 <0.00065 <0.0026 <0.0018 0.096 0.050 0.0037 0.0021 3.08 <0.578 1.16B3011/11/13 3 - 5 0.23 0.019 0.010 D 0.2406 0.20 <0.0012 <0.0065 0.050 <0.00062 0.011 <0.00075 0.14 <0.00075 <0.0030 <0.0021 0.013 D 0.0036 D 0.040 0.051 29.7 22.4 8.60.0056 4.3 4.9 4.6 0.091 0.37 24 4.3 3.3 3.4 0.032 1.7 0.12 NE 16 0.16 1.7 8.5 8.3 68 540 31181,200 1,560 3,129 350 156 14,000 626 626 626 110 1,564 100 NE 9,385 313 626 782 782 939 1,500 46916432,000 40,000 81,760 3,100 4,088 360,000 16,350 16,350 16,350 1,000 40,880 4,000 NE 245,280 8,176 16,350 20,440 20,440 24,528 40,000 12,264Notes: 1. All results in mg/kg = parts per million 2. Bold denotes a compound detection. Shading denotes a STG-MSCC violation. 3. < - denotes less than sample detection limit.4. Sample depths are in feet below ground level. 5. MSCC = Maximum Soil Contaminant Concentration6. "Italics" indicates a Residential MSCC violation.7. "D" = The sample(s) were diluted due to targets detected over the highest point of the calibration curve, or due to matrix interference. Dilution factors are included in the final results. The result is from a diluted sample. 8. "E" = The date exceeds the upper calibration limit; therefore, the concentration is reported as estimated. When the samples were run diluted, the results were below the remorting limit…most likely due to sample heterogeneity.9. "J" = The target analyte was positively identified below the quantitation limit and above the detection limit. Facility ID No: 0-021993 4-Methyl-2-pentanoneResidential MSCCIndustrial /Commercial MSCC Table 4 IPEAcetone1,1-DichloroethaneMethyl ethyl ketoneSoil to groundwater MSCC Sample ID sec-ButylbenzeneIsopropylbenzenep-IsopropyltolueneNaphthaleneEthylbenzeneTotal XylenesC5-C8 AliphaticsC9-C12 AliphaticsC9-C10 AromaticsMTBEn-Butylbenzenen-Propylbenzene1,2,4 TrimethylbenzeneSUMMARY OF SOIL SAMPLING RESULTSIncident Name: Poco Shop #1 Incident No.: 29796 Analytical Method Contaminant of Concern BenzeneToluene1,3,5 TrimethylbenzeneDate: 4/21/23 tert-Butylbenzene Table 5 Date: 4/21/23 Facility ID No. 0-021993 Well ID Date Installed Date Water Level Measured Screened Interval (x to y feet BGS) Bottom of Well (feet BGS) Top of Casing Elevation (feet) Depth to Water from Top of Casing (feet) Free Product Thickness (feet) Groundwater Elevation (feet)CommentsMW11/7/13 12/28/22 5-17 17 99.33 9.63 0 89.70 Type II Groundwater Monitoring Well MW2 3/13/13 12/28/22 5-15 15 98.87 9.52 0 89.35 Type II Groundwater Monitoring Well MW3 3/13/13 12/28/22 5-15 15 98.87 9.90 0 88.97 Type II Groundwater Monitoring Well MW4 3/13/13 12/28/22 5-15 15 99.32 9.17 0 90.15 Type II Groundwater Monitoring Well MW9 11/11/13 12/28/22 4-19 19 98.72 9.24 0 89.48 Type II Groundwater Monitoring WellMW1011/12/13 12/28/22 5-20 20 98.56 9.79 0 88.77 Type II Groundwater Monitoring WellMW1111/12/13 12/28/22 5-20 20 99.30 9.89 0 89.41 Type II Groundwater Monitoring WellMW1211/12/13 12/28/22 OC: 20 IC: 30 30-35 35 99.54 10.30 0 89.24 Type III MW / Deep air sparge pointMW138/19/14 12/28/22 4-19 19 99.02 9.97 0 89.05 Type II Groundwater Monitoring WellMW148/19/14 12/28/22 5-20 20 99.50 10.30 0 89.20 Type II Groundwater Monitoring Well MW16 8/19/14 12/28/22 4-19 19 98.64 9.12 0 89.52 Type II Groundwater Monitoring Well MW17 3/9/15 12/28/22 5-20 20 97.70 8.15 0 89.55 Type II Groundwater Monitoring Well MW18 3/9/15 12/28/22 5-20 20 96.86 7.35 0 89.51 Type II Groundwater Monitoring Well MW19 3/9/15 12/28/22 4-19 19 95.67 6.21 0 89.46 Type II Groundwater Monitoring WellMW203/10/15 12/28/22 5-20 20 96.49 7.72 0 88.77 Type II Groundwater Monitoring WellMW213/9-10/21 12/28/22 OC: 20 IC: 30 30-35 35 87.58 8.31 0 79.27 Type III Groundwater Monitoring WellMW223/9-10/21 12/28/22 OC: 20 IC: 30 30-35 35 96.74 7.79 0 88.95 Type III Groundwater Monitoring WellMWB10/5/17 12/28/22 5-15 15 99.09 9.95 0 89.14 Type II Groundwater Monitoring Well SVE1 10/3/17 -3-10 10 99.36 ---SVE (Pilot Test) Well SVE2 3/8/21 -3-10 10 99.84 ---SVE well SVE3 3/8/21 -3-10 10 100.11 ---SVE wellSVE43/8/21 -3-10 10 100.14 ---SVE wellSVE53/8/21 -3-10 10 99.88 ---SVE wellSVE63/8/21 -3-10 10 99.32 ---SVE wellSVE73/8/21 -3-10 10 98.83 ---SVE well SVE8 3/8/21 -3-10 10 99.30 ---SVE well SVE9 3/8/21 -3-10 10 99.76 ---SVE well SVE10 3/8/21 -3-10 10 99.61 ---SVE well MWA 10/4/17 -3-10 10 99.49 ---SVE Pilot Test Well MWC 10/6/17 12/28/22 20-25 25 99.21 13.96 0 85.25 Type II MW / Shallow air sparge wellAS13/9/21 -30-35 35 99.85 ---Deep air sparge wellAS23/9/21 -20-25 25 99.90 ---Shallow air sparge wellAS33/9/21 -30-35 35 99.01 ---Deep air sparge wellAS43/9/21 -20-25 25 99.03 ---Shallow air sparge well AS5 3/9/21 -30-35 35 99.24 ---Deep air sparge well AS6 3/9/21 -20-25 25 99.26 ---Shallow air sparge well MW15 8/19/14 -5-20 20 99.63 ---abandoned Type II well Notes:1. "BGS" = below ground surface 2. "-" information not available3. "OC"=Outter Casing; "IC"=Inner Casing4. "-"= Not Measured MONITORING WELL CONSTRUCTION INFORMATIONIncident Name: POCO Shop #1 Incident No. 29796 Well Casing Depth (feet BGS)55 5 5 4 5 5 454 5 5 4 5 5 Remedial and Pilot Test Wells: 3 3 3 33333 3 2030 20 5 3 3 20 302030 Table 6 Date: 4/21/23 EPA Method 18M BTEX+TPHEPA Method 18M BTEX+TPHEPA Method 18M BTEX+TPHEPA Method 18M BTEX+TPHEPA Method 18M BTEX+TPHEPA Method 18M BTEX+TPHWell ID Date Collected SVE blower at full power with air sparge on (only ran for long enough to get sample. Then shut air sparge off.) SVE STACK 8/3/21 78,000 18,400 14,300 20,700 < 5490 4,720,000SVE at half power - air sparge off: SVE Stack 9/9/21 1,700 2,010 296 1,850 < 277 180,000 SVE at half power - air sparge on at low flow: SVE Stack 10/13/21 6,650 4,020 < 124 914 < 499 269,000 SVE STACK 11/14/21 5,430 7,830 565 5,150 4,940 241,000SVE Stack 12/6/21 4,100 5,970 238 1,710 < 499 185,000 SVE STACK 1/12/22 1,060 646 < 124 458 < 499 61,800 SVE STACK 2/7/22 704 1,310 < 124 732 < 499 25,600 SVE Stack 3/2/22 3,200 9,690 812 11,600 < 499 128,000 SVE STACK 4/6/22 518 1,680 211 2,380 < 499 39,200SVE STACK 5/4/22 370 592 < 124 4,180 < 499 39,200 SVE STACK 6/2/22 2,200 785 159 1,140 < 499 188,000 SVE STACK 7/7/22 1,010 1,110 276 1,700 <999 378,000 SVE STACK 8/10/22 405 574 < 124 426 < 499 163,000 SVE STACK 9/8/22 166 383 < 124 < 368 < 499 114,000SVE STACK 10/5/22 < 125 < 260 < 124 < 368 < 499 < 12,200 SVE STACK 11/10/22 < 125 279 148 < 368 < 499 25,500 SVE STACK 12/5/22 922 1150 < 124 1990 < 499 122,000 SVE Stack 1/3/23 282 < 260 < 124 < 368 < 499 44,000 SVE STACK 2/8/23 < 125 < 260 < 124 < 368 < 499 < 12,200SVE STACK 3/2/23 < 125 < 260 < 124 < 368 < 499 < 12,200 SVE Stack 4/13/23 < 125 < 260 < 124 < 368 < 499 < 12,200 Notes: 1. All results in parts per billion volume (ppbv) except as noted. 2. BOLD - denotes a detected concentration.TPH GROIncident Name: POCO Shop #1 Incident No. 29796SUMMARY OF AIR SAMPLING RESULTS Facility ID No. 0-021993 Analytical MethodContaminant of Concern BenzeneTolueneTotal xylenesEthylbenzeneMTBE Table 7 Date: 4/21/23 6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200BWell ID Date CollectedMW112/28/22 8.86 20.3 1.15 6.20 104 0.411 < 0.820 < 0.560 4.42 < 1.40 < 1.80 33.2 < 0.500 < 0.250 3.25 < 0.240 < 24.0 < 0.530 < 0.710 < 3.00 < 0.760 < 0.700 < 0.690 MW2 12/28/22 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.250 < 1.00 < 0.240 41.7 < 0.530 < 0.710 < 3.00 < 0.760 < 0.700 < 0.690 MW3 12/28/22 < 0.130 < 0.410 < 0.500 < 1.60 2.84 < 0.200 < 0.820 < 0.560 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.250 < 1.00 < 0.240 < 24.0 < 0.530 < 0.710 < 3.00 < 0.760 < 0.700 < 0.690 MW4 12/28/22 168 867 269 4,090 18.3 < 1.00 643 263 17.6 < 7.00 < 9.00 81.0 < 2.50 < 1.25 < 5.00 < 1.20 < 120 13.6 < 3.55 315 12.3 < 3.50 31.3 MW9 12/28/22 345 691 43.0 210 134 1.93 25.0 8.81 71.2 < 2.80 < 3.60 22.4 < 1.00 < 0.500 9.35 < 0.480 1,360 1.30 < 1.42 19.0 < 1.52 < 1.40 3.66MW1012/28/22 6,780 19,500 1,630 8,610 226 28.3 1,330 392 < 260 < 140 < 180 < 1000 < 50.0 < 25.0 < 100 < 24.0 < 2400 57.1 < 71.0 1,010 < 76.0 < 70.0 157 MW11 12/28/22 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.250 < 1.00 < 0.240 < 24.0 < 0.530 < 0.710 < 3.00 < 0.760 < 0.700 < 0.690 MW12 12/28/22 < 0.130 < 0.410 < 0.500 < 1.60 3.94 < 0.200 < 0.820 < 0.560 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.250 < 1.00 < 0.240 < 24.0 < 0.530 < 0.710 < 3.00 < 0.760 < 0.700 < 0.690 MW13 12/28/22 153 69.4 207 167 79.3 1.59 87.7 25.4 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.250 < 1.00 < 0.240 < 24.0 13.0 1.43 76.4 4.49 2.36 30.8 MW14 12/28/22 < 0.130 < 0.410 < 0.500 < 1.60 9.17 < 0.200 < 0.820 < 0.560 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.250 < 1.00 < 0.240 < 24.0 < 0.530 < 0.710 < 3.00 < 0.760 < 0.700 < 0.690MW1612/28/22 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.250 < 1.00 < 0.240 105 < 0.530 < 0.710 < 3.00 < 0.760 < 0.700 < 0.690 MW17 12/28/22 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.250 < 1.00 < 0.240 < 24.0 < 0.530 < 0.710 < 3.00 < 0.760 < 0.700 < 0.690 MW18 12/28/22 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.250 < 1.00 < 0.240 < 24.0 < 0.530 < 0.710 < 3.00 < 0.760 < 0.700 < 0.690 MW19 12/28/22 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.250 < 1.00 < 0.240 < 24.0 < 0.530 < 0.710 < 3.00 < 0.760 < 0.700 < 0.690 MW20 12/28/22 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.250 < 1.00 < 0.240 < 24.0 < 0.530 < 0.710 < 3.00 < 0.760 < 0.700 < 0.690MW2112/28/22 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.250 < 1.00 < 0.240 < 24.0 < 0.530 < 0.710 < 3.00 < 0.760 < 0.700 < 0.690 MW22 12/28/22 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.250 < 1.00 < 0.240 < 24.0 < 0.530 < 0.710 < 3.00 < 0.760 < 0.700 < 0.690 MWB 12/28/22 0.216 < 0.410 0.701 < 1.60 15.7 < 0.200 1.20 < 0.560 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.250 < 1.00 < 0.240 24.6 < 0.530 < 0.710 < 3.00 < 0.760 < 0.700 < 0.690 MWC 12/28/22 < 0.130 < 0.410 < 0.500 < 1.60 40.8 < 0.200 < 0.820 < 0.560 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.250 < 1.00 < 0.240 37.7 < 0.530 < 0.710 < 3.00 < 0.760 < 0.700 < 0.690 ROD TCC 2,050 none none none 1,000160060050020 70 400 400 4,000 40 100 6,000 0.6 4.0 70 0.4 4,000 70 25 6 70 70 70 5,000 260,000 84,500 85,500 20,000 70,000 28,500 25,000 4,000,000 40,000 100,000 6,000,000 600 4,000 70,000 400 4,000,000 25,000 11,700 6,000 6,900 8500 30,000 Notes: 1. All results in µg/L 2. Bold denotes a compound detection 3. Shading denotes a 2L Standard violation 4. Italics indicates a GCL violation 5. < - denotes less than sample detection limit 6. Dots within the cell indicates a TCC violation. 8. ROD TCC = Record of Decision Target Cleanup Concentrations. 9. "J" Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. 2L Standard GCL BromodicloromethaneBromoformTotal XylenesMTBEToulenen-Butylbenzenep-Cymene (p-Isopropyltoluene)NaphthaleneN-PropylbenzeneAcetoneSec-ButylbenzeneChloroform1,2,4-Trimethylbenzene SUMMARY OF GROUNDWATER SAMPLING RESULTS Incident Name: Poco Shop #1 Incident No. 29796 Analytical Method Contaminant of Concern BenzeneEthylbenzeneIPE1,3,5-Trimethylbenzene2-Butanone (MEK)2-Hexanone4-Methyl-2-pentanone (MIBK)DibromochloromethaneEthanolIsopropylbenzene FIGURES ENVIRONMENTAL CONSULTANTS, P.C. ENVIRONMENTAL CONSULTANTS, P.C. ENVIRONMENTAL CONSULTANTS, P.C. ENVIRONMENTAL CONSULTANTS, P.C. ENVIRONMENTAL CONSULTANTS, P.C. APPENDIX A Page 1 of 8   TECHNICAL METHODS/STANDARD PROCEDURES    Equipment Decontamination    All soil sampling equipment utilized during site assessment activities is decontaminated according  to standard and accepted protocol.  Cleaning solutions range from clean potable water to acidic  solutions or organic solvents depending on the contaminants present at the site.  Equipment  utilized at sites, such as hand augers, contaminated with petroleum hydrocarbons, is generally  decontaminated with a low‐sudsing detergent such as Luiquinox® and triple rinsed with distilled  water.  Larger equipment, such as drill rigs and associated tools, is steam cleaned.  All  decontamination procedures are completed within an established decontamination area which is  located away from the active study area.  Frequency of equipment decontamination depends on  the nature of work being performed, but in no case is decontamination performed less frequently  than once per test (i.e., soil boring, well installation, sample collection, etc.).  Equipment blanks are  collected as a quality control measure when required by job specifications.    Soil Boring Installation    Soil borings are completed using hand‐operated sampling tools, truck‐mounted drills, or  Geoprobe® drilling rigs depending on the depth of sample collection and other site‐specific  conditions.  Hand operated stainless‐steel bucket augers are utilized to collect soil samples at  regular intervals to determine site stratigraphy and to test for the presence of volatile organic  compounds.  Samples retrieved from the hand auger are necessarily disturbed during the augering  process, but can provide accurate information on soil type and contaminant concentrations when  properly interpreted.  Soil samples from hand augered borings are generally retrieved at one to  two foot intervals.    Truck‐mounted or Geoprobe® drilling equipment is often utilized when sample retrieval depths  exceed twenty feet or subsurface conditions prevent utilization of hand augers (i.e., buried rocks,  wood, bricks or other materials occur in the subsurface).  Truck‐mounted drilling rigs usually  retrieve soil via a hollow‐stem auger/split spoon collection method.  Geoprobe® rigs usually employ  a Macro‐Core® tube retrieval system.      Hollow stem augers provide relatively undisturbed 2‐foot cores of soil samples.  Soil samples are  generally collected at five foot intervals utilizing standard penetration test procedures as defined  by the American Society for Testing and Materials (ASTM) or are pushed to the desired depth using  the head of the drill rig.  The standard penetration test involves driving a 2" outside diameter by 1‐ 3/8" inside diameter split‐spoon sampler a minimum distance of one foot with a 340‐lb. slide  hammer falling a distance of 30 inches.      A Geoprobe® rig is a hydraulically‐powered soil probing machine.  The probe utilizes static force  and percussion to advance a small diameter sampling device into the subsurface.  The sampling  apparatus provides relatively undisturbed 5‐foot cores of soil samples.  Soil samples are collected  Page 2 of 8  continuously.  The Macro‐Core® tube contains an inserted poly‐vinyl chloride (PVC) liner which  retains the soil sample as the tube is driven into the ground.  The Macro‐Core® tube is  decontaminated between each 5‐foot sample interval in a soil boring using a Liquinox and tap‐ water mixture.  A new PVC liner is used to collect soil from each sample interval in a soil boring.       Soil samples retrieved from the hollow‐stem augers or Geoprobe are then carefully described  according to the Unified Soil Classification System.  Soil descriptions are recorded on a soil  boring log.    Soil Sampling    Soils to be analyzed by a North Carolina‐certified laboratory are prepared according to the specified  analytical method.  Initially, soil samples are removed from the ground using either a hand auger,  backhoe bucket, spilt spoon auger, or a Macro‐Core® sampling tube.  During the removal, care is  taken to keep the disturbance of the soil structure to a minimum to reduce the loss of  contaminants.  Once removed, the samples are placed in the proper sample container for the  specified analytical method.  For samples collected for the MADEP VPH and EPA Method 8260, a  TerraCore® sampler is used to collect one 5‐gram allotment of soil.  The allotment is placed in  methanol‐preserved 40 mL vials.  Also, one 5‐gram allotment of soil is placed into sodium bisulfate‐ preserved 40 mL vials (one 5‐gram allotment per vial, 2 vials per sample) for the 8260 low  concentration method.  A 250‐mL glass jar of the sampled soil is also collected to provide moisture  content information.  Soils sampled for MADEP EPH, EPA Method 8270 and TPH 5030 and 3550 are  placed in a 250‐mL glass jar (for MADEP EPH analysis an amber jar is required).  TPH 5030 samples  are preserved in methanol similar to the 8260 analysis.  Field personnel wear new, disposable  nitrile gloves during the collection of each sample.     The soil samples are labeled with the sample location, sample identification, date and time of  collection, and the analytical method.  The samples are placed on ice, sent to a laboratory, and  analyzed before the expiration of an analytical method’s prescribed holding time.  Chain‐of‐custody  documentation is maintained for each sample collected in the field.    If the soil is being sampled for volatile or semi‐volatile compounds, a portion of the collected soil is  placed in a sealable bag and screened for volatile organic vapors.  Head screening procedures are  described in the following paragraph.     Headspace Screening    Collected soil samples are routinely tested for the presence of volatile organic compounds (VOCs).   After retrieval from the ground, a portion of a soil sample is placed in a sealable plastic bag.  The  soil samples are then set aside for approximately five minutes so that volatile constituents present  in the sample can reach equilibrium concentrations with headspace gases in the bag.  Once a  suitable time period has passed, the probe of the sampling instrument, typically an Organic Vapor  Monitor (OVM) or a Photo Ionization Detector (PID), is inserted into the bag and the relative  concentration of total VOCs is measured and permanently recorded in a field note book.  VOC  Page 3 of 8  concentrations are measured using either a Thermo Electron Corp. Innova Series catalytic OVM or  an Ion Science PhoCheck PID.  Both the OVM and PID instrumentation are periodically calibrated  according to the manufacturer’s recommended procedures.    The OVM and PID are qualitative tools employed to detect and estimate the concentration of  organic or hydrocarbon vapors.  A thin probe is inserted through a small break in the seal of a  bagged soil sample.  For the OVM, an air sample from the headspace of the bag is drawn through  the probe into an internal chamber where the vapors are catalyzed.  The concentration of the VOCs  is registered on a digital scale in parts per million (ppm).  For the PID, an air sample from the  headspace of the bag is drawn across the face of a lamp causing the sample to emit photons, the  presence of which are converted into a VOC ppm reading that is displayed.  Oxygen levels are field  calibrated prior to each use.  VOC calibration occurs periodically depending upon use by using a  span gas of known concentration in a process recommended by the manufacturer.      Well Installation/Construction    Monitoring wells are installed using hand‐operated sampling tools, a truck‐mounted drill rig, or a  Geoprobe drilling rig depending on the depth of well and other site‐specific conditions. All  monitoring wells are installed according to the requirements of 15A NCAC 2C‐Well Construction  Standards.  Specifically, individual monitoring wells are constructed of 2‐inch diameter, schedule 40  PVC casing riser and screen.  The screen interval is generally 10 to 15 feet of machine slotted PVC  with a slot size of 0.010".  Only flush threaded joints are used.  The annulus space around the  screen is filled with washed filter pack No. 2 sand.  The filter pack extends one to two feet above  the top of the screen.  A one to two foot‐thick bentonite pellet seal is then placed above the filter  pack.  The remainder of the well annulus is completely filled with a Portland (Type I/II) cement  grout mixture.  A protective outer steel manhole, locking cap, and concrete pad is installed for each  well.    Type II Monitoring Well Construction     Single‐cased monitoring wells are generally used in delineation of groundwater quality within the  surficial aquifer.  The wells are constructed of 2‐inch diameter, schedule 40 PVC casing and screen.   The screen interval is generally 10 to 15 feet of machine slotted PVC with a slot size of 0.010".  Only  flush threaded joints are used.  The annulus space around the screen is filled with washed filter  pack No. 2 sand.  The filter pack extends one to two feet above the top of the screen.  A one to two  foot‐thick bentonite pellet seal is then placed above the filter pack.  The remainder of the well  annulus is completely filled with a Portland (Type I/II) cement grout mixture.  A protective outer  steel manhole, locking cap, and concrete pad are installed for each well.    Type III Monitoring Well Construction    Double‐cased monitoring wells are used in the delineation of groundwater quality within a deeper  portion of the surficial aquifer or an additional aquifer (e.g. aquitard, bedrock).  A four to six‐inch  outer casing is installed through the surficial aquifer until a sufficient depth or until the deeper  Page 4 of 8  aquifer is encountered.  The casing is secured with a Portland‐grout collar that is tremmied into the  annular spaced from the bottom of the bore hole to the surface.  Once the grout has sufficiently  cured, the bore hole is continued through the bottom of the outer casing to a depth approximately  15 ‐ 20 feet beneath the outer casing.  The inner casing is constructed of 2‐inch diameter, schedule  40 PVC casing riser and screen.  The screen interval is generally 5 to 10 feet of machine slotted PVC  with a slot size of 0.010".  Only flush threaded joints are used.  The annulus space around the  screen is filled with washed filter pack No. 2 sand.  The filter pack extends one to two feet above  the top of the screen.  A one to two foot‐thick bentonite pellet seal is then placed above the filter  pack.  The remainder of the well annulus is completely filled with the same Portland grout mixture  used in the outer casing.  A protective outer steel manhole, locking cap, and concrete pad are  installed for each well.    Well Development    Following installation of each well, surging and pumping or bailing techniques will be used to  remove fines from the screened interval.  Groundwater is removed from each well until clear water  is retrieved or a noticeable reduction in the amount of silt is achieved.  Purged groundwater is  disposed of in an environmentally safe manner.    Groundwater Sampling    Petroleum Sites    Groundwater samples are collected from temporary or permanent monitoring wells according to  established sampling protocol.  When multiple monitoring wells or sampling points are sampled,  sampling is completed beginning with the least contaminated well to the most contaminated well,  if it is known.  When permanent monitoring wells for petroleum sites are sampled, the well is  purged of a minimum of three well‐bore volumes prior to sample collection in order to assure that  sampled water is representative of aquifer conditions.  In temporary wells, the first water which  migrates into the open borehole is sampled.  Samples from both temporary and permanent  monitoring wells are collected using individually wrapped disposable polyethylene bailers by field  personnel wearing disposable nitrile gloves.  Only one well is sampled with a given bailer in order to  prevent sample cross‐contamination.  During both well purging and sampling, proper protective  clothing and equipment is used and is dependent upon the type and level of contaminants present.  Also, field personnel change gloves between different samples to reduce the chance of cross‐ contamination. Water samples are transferred from the bailer to laboratory‐prepared sampling  containers using slow emptying devices to reduce the chance of contamination loss through  volatilization.  Preservatives, such as acids, are provided by the laboratory in pre‐prepared  containers in which collected samples are placed if in‐field preservation is necessary.  The samples  are labeled with the project name, project number, sample identification, required analysis, and  date and time of collection.  The samples are placed on ice, shipped to a certified laboratory, and  analyzed before the expiration of an analytical method’s prescribed holding time.  Chain‐of‐custody  documentation is maintained for each sample collected in the field.      Page 5 of 8    Other Groundwater Sampling Protocols    When required by state or federal regulations, low‐flow groundwater sampling procedures are  instituted.  Groundwater samples collected in low‐flow situations are collected using a peristaltic  pump. A peristaltic pump is a type of positive displacement pump. The fluid is contained within a  flexible tube fitted inside a circular pump casing.  A rotor with a number of rollers attached to the  external circumference compresses the flexible tube. As the rotor turns, the part of tube under  compression closes thus forcing the fluid to be pumped to move through the tube.  Groundwater  parameters such as water level drawdown, pH, conductivity, dissolved oxygen (DO) and turbidity.  Pumping rate, drawdown, and the time or volume required to obtain stabilization of parameter  readings can be used as a future guide to purge the well. Measurements are collected at a pre‐ pumping established interval (typically five to ten minutes). Once all or a majority of the  parameters have stabilized for three successive readings, stabilization has been achieved. In lieu of  measuring all five parameters, a minimum subset would include pH, conductivity, and turbidity or  DO. Three successive readings should be within ± 0.1 for pH, ± 3% for conductivity, and ± 10% for  turbidity and DO.     Upon parameter stabilization, sampling is initiated. Sampling flow rate is maintained at the estab‐ lished purge rate or is adjusted slightly to minimize aeration, bubble formation, turbulent filling of  sample bottles, or loss of volatiles due to extended residence time in tubing. The same device used  for purging is used to collect the groundwater sample. Generally, volatile parameters are sampled  first. The sequence in which samples for inorganic parameters are collected is not determined  unless filtered (dissolved) samples are collected. Preservatives, such as acids, are provided by the  laboratory in pre‐prepared containers in which collected samples are placed if in‐field preservation  is necessary.  The samples are labeled with the project name, project number, sample  identification, required analysis, and date and time of collection.  The samples are placed on ice,  shipped to a certified laboratory, and analyzed before the expiration of an analytical method’s  prescribed holding time.  Chain‐of‐custody documentation is maintained for each sample collected  in the field.      During both well purging and sampling, proper protective clothing and equipment is used and is  dependent upon the type and level of contaminants present.   Also, field personnel change gloves  between different monitoring wells or sampling points to reduce the chance of cross‐ contamination.  When multiple monitoring wells or sampling points are sampled, sampling is  completed beginning with the least contaminated well to the most contaminated well, if it is  known.    Stockpile Sampling    The number of composite samples collected from a stockpile or a total quantity of excavated soil is  based upon the cubic yardage.  One composite sample is collected for every 100 cubic yards of  contaminated soil excavated.  The volume of a stockpile or total quantity of excavated soil is  calculated by approximating the general geometry of a stockpile or estimating the capacity of the  Page 6 of 8  dump trucks used for hauling.  If a stockpile is sampled, a grid pattern is laid out on the stockpile,  dividing the stockpile into segments of approximately 200 cubic yards.  Two soil borings are  advanced within a grid and three soil samples are collected from each soil boring at various depths.   The six soil samples are mixed into a composite sample by a trained TerraQuest technician.  If truck  loads are sampled, an aliquot sample is collected from the hauling trucks at a frequency based  upon the capacity of the hauling trucks.      Aliquots are gently mixed into a composite sample by a trained TerraQuest technician. Every effort  is made to minimize the loss of contaminants through volatilization.  The composited soil samples  are jarred in the appropriate laboratory‐prepared containers, labeled with the sample location,  sample identification, date of collection, time of collection, the analytical method, and the  preservative.  The samples are placed on ice, shipped to a laboratory, and analyzed before the  expiration of an analytical method’s prescribed holding time.  Chain‐of‐custody documentation is  maintained for each sample collected in the field.    Surface Water Sampling    Surface water samples, specifically samples from creeks or streams, are collected from a  moving/flowing portion of the creek or stream to ensure that stagnant water is not collected.  Field  personnel are careful to collect samples from flowing areas that are not so turbulent as to cause a  loss of volatile contaminants which might have been contained in the creek’s/stream’s water.   Samples are collected by field personnel wearing disposable nitrile gloves.  Field personnel change  gloves between different locations to reduce the chance of cross‐contamination.  Samples are  collected directly from the appropriate creek or stream location and placed into the appropriate  laboratory‐prepared containers.  Preservatives, such as acids, are provided by the laboratory in pre‐ prepared containers in which collected samples are placed if in‐field preservation is necessary. The  samples are labeled with the project name, project number, sample identification, required  analysis, and date and time of collection.  The samples are cooled on ice to approximately four  degrees centigrade, shipped to a certified laboratory, and analyzed before the expiration of an  analytical method’s prescribed holding time.  Chain‐of‐custody documentation is maintained for  each sample collected in the field.       Potable Well Sampling    Groundwater samples from potable wells are collected from sampling points, typically spigots,  located in the closest proximity to the potable well pump house as possible.  Prior to sample  collection, the water is run for a sufficient amount of time to purge the bladder tank and assure  that sampled water is representative of aquifer conditions.  Once purged, the flow rate is reduced  and samples are placed in the appropriate laboratory prepared containers with the appropriate  acid preservatives added if preservation of the sample is necessary.  The samples are labeled with  the project name, project number, sample identification, required analysis, and date and time of  collection.  The samples are placed on ice, shipped to a laboratory, and analyzed before the  expiration of an analytical method’s prescribed holding time.  Chain‐of‐custody documentation is  maintained for each sample collected in the field.   Page 7 of 8  Public Water Supply Line Sampling    Groundwater samples from public water supply lines are collected from sampling points, typically  spigots.  To sample the spigot, the flow rate is reduced and samples are placed in the appropriate  laboratory prepared containers.  The samples are labeled with the sample location, sample  identification, date of collection, time of collection, and required analytical method.  The samples  are placed on ice, shipped to a laboratory, and analyzed before the expiration of an analytical  method’s prescribed holding time.  Chain‐of‐custody documentation is maintained for each sample  collected in the field.     Air Sampling    Air samples are collected with the aide of a manually operated MityVac® pump manufactured by  Pristech, Inc.  The air sampling process begins by connecting a length of rubber hose from the  MityVac® pump to the port to be sampled, or by hanging the hose inside of an emissions stack in  such a manner as to ensure no outside air causes dilution.  Another length of hose is fixed to the  outlet port of the pump and is connected to a new Tedlar bag.  Once the pump is hooked up, a  valve on the Tedlar collection bag is opened and air is manually forced into the bag by the pumping  action of sampling personnel.      Field Measurements    Field measurements taken to determine the pH, conductivity, temperature, and dissolved oxygen  concentration of a particular groundwater sample are taken directly after a particular monitoring  well has been adequately purged.  This ensures that the groundwater parameter data collected is  representative of the aquifer conditions at a given location.  Once purging of the monitoring well is  complete, the decontaminated probe head and cord of the appropriate unit is lowered into the  required monitoring well.  If the depth to water in a specific monitoring well is greater than the  length of cord for a particular unit, a new, disposable bailer is slowly lowered into the appropriate  monitoring well and a representative groundwater sample is retrieved.  A slow pouring device is  fitted onto the end of the disposable bailer and the sample is slowly poured into a new, disposable  plastic cup.  Groundwater parameter data are then collected from the groundwater in the cup  using the required unit.      For pH, conductivity, and temperature, a Hanna Instruments Model 991300 portable meter is  utilized.  This unit is periodically calibrated and maintained in accordance with the unit’s operations  manual by field personnel.  Prior to data collection, the unit is properly decontaminated to prevent  cross‐contamination.  The unit is decontaminated between each sample.  The procedure used for  sample measurement involves lowering the meter’s probe into the new, disposable cup containing  the groundwater sample to be measured and slowly stirring the probe to force groundwater across  the probe’s membrane.  The measurements displayed by the meter are then recorded.      For dissolved oxygen concentration measurements, a YSI® Model 55 Handheld Dissolved Oxygen  System is utilized.  This unit is periodically calibrated and maintained in accordance with the unit’s  Page 8 of 8  operations manual by field personnel.  Prior to data collection, the unit is properly decontaminated  to prevent cross‐contamination.  The unit is decontaminated between each sample.  The procedure  used for sample measurement involves adjusting the unit for the correct altitude where the  sampling will take place and adjusting the reported units desired.  Once this is done, the unit’s  probe is inserted into the groundwater sample to be measured and the probe is slowly stirred to  force the groundwater across the probe’s membrane.  The measurements displayed by the unit are  then recorded.      For turbidity measurements, a Hach 2100P Portable Turbidity meter or equal equivalent is utilized.   The unit is calibrated prior to use in accordance with the unit’s operations manual by field  personnel.  Groundwater samples are collected in glass containers for measurement by the  instrument.  The glass containers are washed with bottled‐water between each measurement  collection.  Once the sample is collected and inserted into the instrument, the measurements  displayed by the instrument are then recorded.          APPENDIX B Terraquest Environmental Consultants, P.C. 100 E Ruffin St, Mebane, NC 27302 (919) 563-9091 Page 1 of 17 Chronological Site History for POCO Shop #1 Responsible Party: Parnell Oil Company, Inc. Release address: 97 N. Fayetteville Street Parkton, Robeson County, North Carolina Incident No. 29796 December 27, 1962 Parnell Oil Company, Inc. purchased the property. September 26, 1988 USTS (T1 – T3) are installed. November 1, 2012 Geological Resources, Inc. completed at Phase II Environmental Site Assessment. A 24-hr report form was filed with the NCDWM. January 7, 2013 Terraquest completed a site check/ Phase I LSA by advancing sixteen soil borings and installing one type II monitoring well (MW1). January 10, 2013 Terraquest sampled monitoring well MW1. Analytical results reveal contamination above GCLs. February 12, 2013 Terraquest submitted Site Check Report. March 13, 2013 Terraquest installed groundwater monitoring wells MW2 – MW4 as part of Phase II LSA activities. March 14, 2013 Terraquest collected groundwater samples from MW2 – MW4. April 27, 2013 Terraquest submitted Limited Site Assessment Report (Phase II). May 23, 2013 NORR is issued requesting CSA. October 22, 2013 Terraquest installed temporary monitoring wells (TMW5 – TMW8) on McMillian property. October 22, 2013 POCO Shop #1 facility is sold to RSAP of Raeford, LLC. October 24, 2013 Terraquest attempted to collect groundwater samples from temporary wells. Well were found to be dry. Water levels fell over 5 feet across site. Terraquest Environmental Consultants, P.C. 100 E Ruffin St, Mebane, NC 27302 (919) 563-9091 Page 2 of 17 October 25, 2013 Terraquest collected groundwater samples from temporary well locations using SP-16 groundwater collection method. Temporary wells were abandoned. November 11-13, 2013 Terraquest supervised the installation of 3 type II wells and 1 type III well. Fourteen soil borings were advanced. Groundwater samples were collected from MW1-4 and MW9-12. January 8, 2014 Terraquest submitted a Comprehensive Site Assessment Report. That report discussed efforts to fully delineate the extent of soil and groundwater contamination and define specific aquifer characteristics that influence the movement of contaminants. August 19 & 22, 2014 Terraquest supervised the installation of 4 type II wells (MW13 – MW16) on the adjacent property owned by Family Dollar. Groundwater samples were collected from these wells on August 22, 2014. March 9 & 10, 2015 Terraquest supervised the installation of 4 type II wells (MW17 – MW20) in the Town of Parkton’s right-of-way. March 17, 2015 Terraquest collected groundwater samples from monitoring wells MW1 – MW14, and MW17 – MW20. July 1, 2015 Terraquest emailed the Incident Manager, Ken Currie and stated some rough ideas for corrective action. Informed Mr. Currie that pump and treat viability will be based on acceptance of treated water by town’s POTW. July 22, 2015 Terraquest emails the POTW to ascertain if treated water would be accepted. August 3, 2015 Tim Little of the Parkton POTW emailed with Terraquest. They are generally open to accepting the treated water. Terraquest emailed the Incident Manager Ken Currie and let him know the Town was tentatively accepting of treated water. Terraquest acknowledged that Trust Fund was likely not in favor of this method due to its aggressiveness. However, the RP’s goal was to protect human health and the environment. Terraquest Environmental Consultants, P.C. 100 E Ruffin St, Mebane, NC 27302 (919) 563-9091 Page 3 of 17 The Incident Manager Ken Currie emailed back to acknowledge his concern over this highly contaminated site and his agreement to cleanup the onsite contamination and reduce that which is traveling offsite. August 6, 2015 The Incident Manager Ken Currie emailed to say that he and the Regional Supervisor, Wayne Randolph agreed that a CAP was needed to remediate this site. They were especially concerned with the presence of contamination in a deeper monitoring well due to the proximity of the city well. August 28, 2015 Terraquest sent the NCDWM-UST an ePATA for CAP pilot testing and system design work. The ePATA was tailored based on previous correspondences with the NCDWM-UST. September 11, 2015 Upon receipt of the ePATA, Scott Ryals responded to the CAB Incident Manager his displeasure that the RP and consultant have ruled out tank and source removal as a remedial approach. Mr. Ryals felt that removal of the tanks and a $200,000 soil excavation with an interceptor trench along the road was an idea that needed consideration. Mr. Ryals was upset that pilot testing for air sparging and SVE were proposed as they were old, standard way of doing things and there was not sufficient space for such a system onsite. (Note that the RP does not own the tanks and cannot dictate their removal. This method is not possible as stated by the RP and Terraquest. There is sufficient space onsite for a treatment system) Approval was denied. October 15, 2015 Terraquest emailed the Incident Manager Ken Currie a summary document of thoughts on corrective action progression. An attempt was made to lay out possible avenues so that he and Trust Fund could see what Terraquest and the RP’s plans were to ensure it’s something that both Ken and Trust Fund would be on board with. It was stated that “Obviously, we haven’t completed the CAP so there are things that have not been fully evaluated, however, we need everyone to agree that it’s an acceptable path to head down so that we aren’t wasting time and money.” The Incident Manager Ken Currie emailed back saying he was in favor of this summary plan and would forward it to Scott Ryals. Terraquest Environmental Consultants, P.C. 100 E Ruffin St, Mebane, NC 27302 (919) 563-9091 Page 4 of 17 October 28, 2015 Scott Ryals responds to Terraquest’s CAP ideas by stating that a traditional CAP via MNA, excavation, AS/SVE has been ruled out and the only option is an oxygen system placed directly in the wells. The Incident Manager Ken Currie emailed back that due to the risk of this site, some sort of pilot testing would be required to validate Scott Ryal’s proposed oxygen system. Ken stated his concerns that the cost of an oxygen system that will work on all portion of the plume, including the deeper aquifer, may exceed that of a more traditional approach. Throughout the holiday’s, Terraquest further researched various remedial methods that would be acceptable to Scott Ryals at Trust Fund. January 5, 2016 Terraquest emailed an ePATA that requested approval of costs associated with CAP development using Scott Ryal’s method of oxygen diffusion and also includes in-well bubbling of the deeper wells. January 6, 2016 The Incident Manager Ken Currie emailed Terraquest back and recommended the installation of an additional Type III deep well to ensure that progress forward on the Ryals’ oxygen diffusion CAP was done with sufficient data. January 20, 2016 Scott Ryals does not approve the ePATA but emails questions about the method of pilot testing. The Incident Manager Ken Currie emailed back explaining the ePATA and thinking behind the remedial approach. The oxygen system CAP ePATA was not approved by Scott Ryals. March 4, 2016 Terraquest emailed an ePATA that requested approval of a groundwater sampling event. The Incident Manager Ken Currie emailed back and requested that a water supply well be added to the sampling event. Terraquest added Mr. Currie’s recommendation and sent back. Terraquest Environmental Consultants, P.C. 100 E Ruffin St, Mebane, NC 27302 (919) 563-9091 Page 5 of 17 ~March 21, 2016 The RP, Dave Parnell, sent a letter to the NCDWM-UST requesting that they allow forward progress of corrective action at this release incident. No response was received. April 25, 2016 Terraquest collected groundwater samples from monitoring wells MW1 – MW4 and MW9 – MW20. Samples were also collected from Parkton’s municipal well (Well #1) and potable well PW3. May 26, 2016 Terraquest personnel resampled monitoring well MW12 to verify an accidently switch of MW12 and MW16 results for the April 25, 2016 event. June 9, 2016 Terraquest emailed the Incident Manager Ken Currie a graph showing an increase in deep aquifer contamination. The Groundwater Monitoring Report was sent via USPS. June 9, 2016 The Incident Manager Ken Currie emailed Terraquest to state that based on new CAP procedures the NCDWM-UST was required to have a summit meeting. Mr. Currie expressed his concern with deeper aquifer contamination. July 13, 2016 The Incident Manager Ken Currie emailed to say that he and the Regional Supervisor, Wayne Randolph had met to discuss how to move forward with corrective action at this site. They felt that the installation of another Type III well would provide better information on vertical contaminant migration. July 29, 2016 The NCDWM-UST issues an acknowledgement of report receipt correspondence. The correspondence requests the installation of an additional Type III well. August 5, 2016 Terraquest established Vereit, Inc. manages the the Family Dollar property in Parkton, NC. An attempt was made to contact Audrey Verde, the property manager. August 11, 2016 Terraquest makes contact with Audrey Verde by telephone. She requests a brief summary of the project and what work is planned for the Family Dollar property. Terraquest sends Ms. Verde a brief summary, access agreement, and drawings. Terraquest Environmental Consultants, P.C. 100 E Ruffin St, Mebane, NC 27302 (919) 563-9091 Page 6 of 17 August 11, 2016 Terraquest and the RP are denied offsite access to the Family Dollar property without payment for the purpose of drilling the requested Type III well. Trust Fund would not pay for access. Their legal department made liability requests that Terraquest was unable to acquiesce to. August 16, 2016 Tambre Rudd of Vereit, Inc. legal department sends Terraquest draft access contract and request for $750 for completing the contract. September 2016 Terraquest corresponds with their own counsel, the RP, the offsite property owner (Family Dollar), and the Incident Manager, Ken Currie regarding the Type III well. Ultimately, Trust Fund would not pay the $750 access fee and Terraquest’s attorney recommended that they not agree to the liability demands of Family Dollar’s legal document. September 7, 2016 Terraquest personnel sampled monitoring wells MW1-4, MW9-14, and water supply wells PW3 and the Town of Parkton’s Well #1. The samples were analyzed without dilution for Method 6200B. This caused results for several compounds to be well over calibration range, and also caused carryover for some of the samples. The analyses were not reportable due to a Continuing Calibration Verification failure. The samples required resampling. September 20, 2019 Terraquest contacts NCDOT to see if installing the well within the David Parnell St right-of-way is an option. Charles Miller of the NCDOT does not like the idea of having a permanent well at this location. Terraquest alters the plan of work and requests right-of-way access to complete temporary boring with groundwater sampling (SP-16 sampling). September 29, 2016 Following denial of offsite access, Terraquest conversed with the NCDOT and received approval to drill a temporary well in the road between the site and the Family Dollar where access is denied. This was emailed to Ken Currie. September 30, 2016 The Incident Manager Ken Currie emailed to say that he agreed with the temporary well idea. He requests a change order ePATA for the SP-16 footage and removal of the Type III costs October 19, 2016 Scott Ryals denies the ePATA for the NCDEQ-required well permit and an NCDOT-required access agreement. Terraquest Environmental Consultants, P.C. 100 E Ruffin St, Mebane, NC 27302 (919) 563-9091 Page 7 of 17 When told that these items were required, Mr. Ryals requests contact information for the NCDOT. October 19, 2016 Terraquest personnel sampled monitoring wells MW1-4, MW9-14, and water supply wells PW3 and the Town of Parkton’s Well #1. November 2, 2016 Scott Ryals states that he has not heard back from the NCDOT regarding the requirement for an access agreement for temporary well installation. November 4, 2016 Terraquest emailed Vance Jackson and Scott Ryals. The email detailed the risk of the release incident and efforts to move forward. Teraquest stated that while drilling costs for a temporary well have been approved the denial of the NCDOT-required agreement prevents this work from happening. Scott Ryals sends an email rescinding all approval for the temporary well. Mr. Ryals then calls Terraquest, is informed of the situation. He agrees in principal to the work during the phone call. He subsequently approves a new ePATA with an old ePATA number. This cancels the original work and only approves the NCDOT agreement. November 8, 2016 Scott Bullock, the head of the Corrective Action branch, states that he does not believe there is a need for a temporary well in the NCDOT right of way. He recommends installing a Type III well on the Post Office property over 225 feet downgradient. Subsequent conversation with the NCDWM-UST indicate that 225 feet downgradient is likely too far away to show vertical migration of the onsite plume. Several other areas are investigated as potential Type III well locations with a good spot never identified. December 16, 2016 Terraquest emailed the Incident Manager Ken Currie and discussed several offsite drill locations for a Type III well pointing out the issues in a suitable location. Terraquest notes that pilot testing is required for corrective action. December 20, 2016 The Incident Manager, Ken Currie emailed to say that ePATAs are on hold pending the new task code rates. January 27, 2017 Terraquest emailed the Incident Manager, Ken Currie to discuss the path forward. Discussion of how to deal with soil and groundwater Terraquest Environmental Consultants, P.C. 100 E Ruffin St, Mebane, NC 27302 (919) 563-9091 Page 8 of 17 was provided along with a question as to how to proceed under the new 3-step CAP process. February 16, 2017 Following staff training, the Incident Manager, Ken Currie emailed Terraquest with a path forward toward corrective action. This included a decision on Type III wells and then a decision on a treatment system that can do cleanup in 2-3 years. After that the ideas would be presented to Scott Ryals at Trust Fund. Terraquest and Ken Currie emailed to determine the location of Type III wells. Terraquest subsequently sent in an ePATA for those two wells. February 28, 2017 The Incident Manager, Ken Currie emailed to say that Scott Ryals had concerns about why we were trying to delineate the deep aquifer with only two onsite wells. Mr. Currie explained to Mr. Ryals that the goal was not delineation but to learn what is migrating offsite. Mr. Currie emphasized the importance of getting started with corrective action. March 2, 2017 The Incident Manager, Ken Currie emailed to say that he and Wayne Randolph agreed that the site needs aggressive cleanup. He stated that while it would be nice to have another Type III well, the location of one over 400 feet away where access might be available was not really a priority. Scott Ryals of Trust Fund had not approved the onsite Type III wells. March 17, 2017 Terraquest personnel sampled monitoring wells MW1-4, MW9-20, and water supply wells PW3 and the Town of Parkton’s Well #1. August 8, 2017 The NCDWM-UST held an internal meeting to discuss the forward path for this release incident. Neither Terraquest nor the RP were invited nor present at that meeting. Scott Ryals notes during the meeting that further investigation needs to be made into whether or not the current system is leaking. (VOC analyses from this point on have 5 oxygenates added to the analyte list – a new release is not indicated) The outcome of the meeting made known to Terraquest was to proceed with SVE and air sparge pilot testing. Terraquest Environmental Consultants, P.C. 100 E Ruffin St, Mebane, NC 27302 (919) 563-9091 Page 9 of 17 August 21, 2017 Terraquest receives approval for SVE and air sparge pilot testing. October 3, 2017 Terraquest installed pilot test and monitoring wells and sampled select wells. October 9-10, 2017 Terraquest conducted SVE and air sparge pilot tests. November The pilot test results were provided to the NCDWM-UST. January 2018 Questions and concerns regarding the pilot testing were presented to Terraquest in emails. March 21, 2018 Terraquest submitted an SVE and Air Sparge Pilot Test Supplemental Report. April 13, 2018 The NCDWM-UST issued an NORR requesting the completion of Corrective Action Design. April 17, 2018 John Haselow requests pre-approval of a Corrective Action Design Report as 6.066 April 29, 2018 Pre-approval is granted by the NCDWM-UST via 29796-017 for completion of a Corrective Action Design Report as 6.066. May 16, 2018 Terraquest collected groundwater samples from monitoring wells MW1-4, 9-14, 16, 19, and 20. July 31, 2018 Terraquest spoke with Mr. Tim Little (910) 474-6616 who is the director of Public Works for the Town of Parkton. Mr. Little confirmed that power is supplied to the site by Duke Energy Progress. Called Duke Energy Progress and requested they inform of what power is available at the site. July 31, 2018 Terraquest spoke with Jackie Easton who is the clerk for Robeson County at (910) 272-6525. Ms. Easton advised that zoning was handled by the Town of Parkton and building inspections were handled by Robeson County. Inspections can be reached at (910) 272- 6540. Inspectors are usually in the field from 10 until 3:30PM. August 2, 2018 Kristin Parker with Duke Energy Progress called to say that she would go by site soon to inspect and advise as to what power is available. Terraquest Environmental Consultants, P.C. 100 E Ruffin St, Mebane, NC 27302 (919) 563-9091 Page 10 of 17 August 9, 2018 Kristin Parker with Duke Energy Progress visited the site and said that power can drop to us from either street. Three phase power is available at most common voltages we would want and delta/wye configuration is also available. August 14, 2018 Terraquest called Kristin Parker with Duke Energy Progress to determine her availability to meet onsite and further discuss power utility. August 15, 2018 Kristin Parker with Duke Energy Progress confirmed that Monday, August 20, 2018 she was able to meet onsite. August 15, 2018 Terraquest contacted Richard Cummings with Robeson County Building Inspections and the responsible party to schedule an onsite meeting for Monday, August 20, 2018. The RP also contacted the property owner and store operator. August 20, 2018 Terraquest met onsite with property owner (Roger Shaw), store operator (Amit Patel), and Kristin Parker from Duke Energy Progress. Discussed location of treatment system. August 20, 2018 Terraquest spoke with Robeson County Building Inspector Richard Cummings. Mr. Cummings differed building construction regarding fire concerns to the Fire Marshal. He also stated that property setbacks are established by the Town of Parkton. August 20, 2018 Terraquest spoke with Dwight Shepard (910) 813-9729 who is the local Fire Marshal. He said treatment system enclosure should be either cinder block or metal. Can’t be anything combustible. August 22, 2018 Terraquest spoke with Wanda Dockery (910) 858-3360 yesterday concerning the Town of Parkton’s zoning rules regarding property setbacks. She said she would check with someone and get back in touch. August 23, 2018 Wanda Dockery with the Town of Parkton called today and put the mayor (Al McMillan) on the phone. Explained to him where exactly we were trying to put our remedial boxes on the POCO #1 property. He said that since they didn’t have any property setbacks, he would say to use 6 feet as a limit. He will send us a letter stating as such. Terraquest Environmental Consultants, P.C. 100 E Ruffin St, Mebane, NC 27302 (919) 563-9091 Page 11 of 17 September 19, 2018 John S. Haselow, Ph.D., P.E. sends equipment and installation bid specifications to Scott Ryals for review. October 24, 2018 Scott Ryals authorizes the bid specifications. November 6, 2018 Bid specifications are sent to vendors to solicit quotes. February 14, 2019 John S. Haselow, Ph.D., P.E. submits a Corrective Action Design Report to the NCDWM-UST. February 26, 2019 The Incident Manager Ken Currie emailed to say that he had received the CADR. April 8, 2019 Terraquest provides the NCDWM-UST with evidence of public notification of the CADR. April 15, 2019 Following public notification of the CADR, the NCDWM-UST approves the CADR. June 19, 2019 Terraquest submitted a Record of Decision and Groundwater Modeling Report. July 26, 2019 Terraquest asks the Incident Manager for the status of the ROD who replies that it is under review by Scott Ryals. August 2, 2019 Scott Ryals tells Ken Currie that the report has been on his desk for 10 days but he has not had time to look at it. August 7, 2019 Scott Ryals emails Ken Currie and Terraquest to say that two RODs will be required for this one site and that the AS/SVE should be moved forward so it can be installed. He requests data from the previously submitted bid specifications be included in the ROD. (A ROD for offsite natural attenuation is not required as it is not active remediation. Furthermore, there is only one release incident and it should not be treated as two. The purpose of the ROD is for the agreed-upon corrective action to be written down and agreed to in one place. Not in two dissimilar documents.) August 7, 2019 In light of Scott Ryals’ 8/7/19 email, Terraquest asked the Trust Fund Branch Head, Bill Hunneke, if Terraquest could get paid for work already completed including the ROD and groundwater model. Terraquest’s work was submitted to the NCDWM-UST Terraquest Environmental Consultants, P.C. 100 E Ruffin St, Mebane, NC 27302 (919) 563-9091 Page 12 of 17 Bill Hunneke emailed back and said “Yes, go ahead and turn in reimbursement for work already completed.” August 19, 2019 The Incident Manager, Ken Currie, emailed with Terraquest to clarify what needed to be in the revised ROD. Ken stated that Bill Hunneke said: “you can go ahead and invoice for the ROD”. August 19, 2019 Terraquest resubmits the ROD with requested information from the bid specification included. August 20, 2019 The Incident Manager, Ken Currie, emailed the ROD to Scott Ryals for his review. September 4, 2019 Terraquest spoke with the Incident Manager, Ken Currie. He said the update done to the ROD has everything satisfied and it should be ready to sign. Terraquest emailed the Trust Fund Branch Head, Bill Hunneke, to let him know that the ROD was ready to sign. Asked for guidance on the next step. September 6, 2019 The Trust Fund Branch Head, Bill Hunneke, emailed Terraquest and said that the ROD was on Scott Ryals’ desk and he would get to it early next week. September 10, 2019 The Incident Manager, Ken Currie, and Scott Ryals of Trust Fund, discussed who is signing the ROD and how things are to move forward. A request for a groundwater sampling event was emailed to Terraquest. Terraquest sent in an ePATA for a groundwater sampling event. September 11, 2019 The NCDWM-UST grants pre-approval of costs for a groundwater sampling event. October 7, 2019 Terraquest emails the Trust Fund to ask about the status of payment for the ROD and groundwater model. October 9, 2019 Trust Fund states that the ROD is still being reviewed by Scott Ryals. Terraquest Environmental Consultants, P.C. 100 E Ruffin St, Mebane, NC 27302 (919) 563-9091 Page 13 of 17 October 17, 2019 Terraquest sends the Trust Fund Branch Head, Bill Hunneke, a completed signature page for the ROD. October 24, 2019 The Trust Fund Branch Head, Bill Hunneke, says he hasn’t forgotten about the ROD. November 1, 2019 Terraquest corresponds with the Trust Fund Branch Head, Bill Hunneke to say that the ROD still isn’t signed by them and that payment has not been made. November 6, 2019 The NC Leaking UST Trust Fund issues correspondence regarding he reimbursement request for the submitted groundwater model and ROD. Funding for the ROD is denied. The correspondence states that “The record of decision for this task has not been determined, therefore not reimbursable at this time.” November 8, 2019 Terraquest corresponds with the Trust Fund Branch Head, Bill Hunneke to say that the ROD still isn’t signed by them and that payment has not been made. December 11, 2019 The RP, Dave Parnell, Terraquest, and regulators of the NCDWM-UST including Michael Scott, Vance Jackson, Scott Bullock, Bill Hunneke, Scott Ryals, Wayne Randolph, and Ken Currie met to discuss the ROD and a path forward. An unsigned letter on blank paper that was dated September 11, 2018 was provided to the RP and Terraquest for the first time. The letter was a review of the ROD with requests for revisions. All parties sorted through the document to agree on details to finalize the ROD. The NCDWM-UST agreed to pay for additional work on the ROD and granted payment toward the meeting. The primary request was for an updated groundwater sampling event to ensure that there was not a current release happening. December 12, 2019 Terraquest personnel sampled groundwater monitoring wells MW1-4, MW9-14, MW16-20, and MWB and MWC. All samples were submitted to an NC-certified lab for analysis per 6200B for VOCs and five oxygenates were also targeted. December 31, 2019 Terraquest sent a Monitoring Report to the NCDWM-UST detailing the December 12, 2019 groundwater sampling event. The report confirmed that there was no obvious signs of a new release occurring. Terraquest Environmental Consultants, P.C. 100 E Ruffin St, Mebane, NC 27302 (919) 563-9091 Page 14 of 17 January 9, 2020 Terraquest sent an email to Scott Ryals of the NCDWM-UST. In working on the ROD, a discrepancy was found between what was asked as a correction and what the ROD template had laid out. January 14, 2020 Scott Ryals confirmed that he had received the January 9, 2019 email and requested a copy of the ROD template. Terraquest provided that via return email. In a subsequent email, Scott Ryals emailed a new version of the ROD template with different wording on the signature page. That wording was incorporated into Version 3.0 of the ROD. Terraquest sent the ROD Version 3.0 to the NCDWM-UST (paper copy). January 22, 2020 Terraquest emailed a copy of the ROD to Scott Ryals. January 24, 2020 The NCDWM-UST MRO confirmed receipt of the ROD V3.0. February 5, 2020 Terraquest asked Scott Ryals if he has completed review of the ROD. February 11, 2020 Terraquest again asked Scott Ryals if he has completed review of the ROD. Mr. Ryals stated that he has sent his comments off for managerial review. February 19, 2020 The NCDWM-UST sent another round of questions and change requests for the ROD. March 11, 2020 Terraquest contacted Bill Hunneke regarding review of the ROD. March 13, 2020 Bill Hunneke informed Terraquest that Vance Jackson would send Terraquest a letter next week due to vacation time. March 23, 2020 Terraquest contacted Bill Hunneke regarding review of the ROD. Bill said Vance is swamped April 2, 2020 Terraquest contacted Bill Hunneke regarding review of the ROD. April 6, 2020 Terraquest spoke to Bill about the status of the ROD and he was going to ask Vance. Terraquest noted that we were holding trust fund package and cannot get paid. April 9, 2020 Terraquest contacted Bill Hunneke and Vance Jackson regarding review of the ROD. Terraquest Environmental Consultants, P.C. 100 E Ruffin St, Mebane, NC 27302 (919) 563-9091 Page 15 of 17 April 16, 2020 Terraquest contacted Bill Hunneke regarding review of the ROD. April 20, 2020 Terraquest spoke to Vance and Bill about the ROD. Vance was going to get a letter out on 4/21/20. April 22, 2020 Terraquest emailed Vance and Bill about ROD letter. April 2020 Vance Jackson responded with comments about the ROD. April 30, 2020 Terraquest asked Bill some questions about the comments on the ROD while preparing the answers to other questions. June 26, 2020 Terraquest resubmitted with update model results for cleanup levels. July 29, 2020 Asked Vance about status in voicemail. August 11, 2020 Terraquest sent another email to Vance August 17, 2020 Terraquest communicated more with Dave Parnell and Ken Currie. August 20, 2020 Terraquest emailed Dave Parnell again. August 28, 2020 Vance emailed Terraquest to say ROD was ready. August 31, 2020 Terraquest called Vance and he said ROD was ready, just waiting on Scott Ryals to write letter then they can see about meeting and signatures. September 9, 2020 Terraquest emailed Scott about status of letter for ROD. September 10, 2020 Scott emailed Terraquest back and said he would need to discuss with Vance. Terraquest told Scott in prior email that Vance said it was good to go. Terraquest called Dave Parnell with this info. September 18, 2020 Vance told Terraquest to go ahead and print and sign final ROD page. He was discussing an issue about remediation with Scott regarding fluctuations in groundwater and STG MSCCs. October 22, 2020 All parties sign an Amendment Memo to the ROD. The Memo allows for the installation and operation of the treatment system followed by an evaluation of cleanup levels following operation. The Memo also allows for the installation of two downgradient monitoring wells. Terraquest Environmental Consultants, P.C. 100 E Ruffin St, Mebane, NC 27302 (919) 563-9091 Page 16 of 17 October 23, 2020 All parties meet via online conference to approve the ROD. The NCDWM-UST requests the completion of a groundwater monitoring event. January 7, 2021 Roy Lowder of the Town of Parkton Public Works grants offsite access for the purpose of installing groundwater monitoring wells of the ROD Memo. February 15, 2021 Terraquest updates the NOI WI0600188 with the NCDEQ DWR UIC. As part of the approved Record of Decision for POCO #1, Terraquest is scheduled to drill six additional air sparge wells in March 2021. Terraquest requests a well construction permit for the offsite Type III wells. February 18, 2021 The NCDEQ-DWR grants well construction permit WM0601170. February 26, 2021 Terraquest sampled groundwater monitoring wells MW1-4, MW9-14, MW16-20, MWB, and MWC and Town water supply well WSW1. March 8-9, 2021 Terraquest supervised the installation of monitoring wells MW21 and MW22, soil vapor extraction wells SVE2-10, and air sparge wells AS1-6. August 3, 2021 The air sparge and remediation system was started. Air sparge was only run for a few minutes to observe flows and collect an exhaust sample. SVE was turned on and allowed to continue operation throughout the quarter. October 13, 2021 Terraquest sampled groundwater monitoring wells MW1-4, MW9-14, MW16-22, MWB, and MWC. Town water supply well WSW1 was down for repairs and was not sampled. Terraquest was informed during a 10/21/21 telephone discussion with the Public Works Director Roy Lowder, that a new valve needs to be replaced for the well and then it will be back up and running. October 21, 2021 Terraquest was informed during a telephone discussion with the Public Works Director Roy Lowder, that a new valve needs to be replaced for the town water supply well WSW1 and then it will be back up and running. Terraquest Environmental Consultants, P.C. 100 E Ruffin St, Mebane, NC 27302 (919) 563-9091 Page 17 of 17 December 20, 2021 Terraquest sampled groundwater monitoring wells MW1-4, MW9-14, MW16-22, MWB, and MWC. Town water supply well WSW1 had been fixed and was sampled also. March 15, 2022 Terraquest sampled groundwater monitoring wells MW1-4, MW9-14, MW16-22, MWB, and MWC, and Town water supply well WSW1. June 2, 2022 Terraquest sampled groundwater monitoring wells MW1-4, MW9-14, MW16-22, MWB, and MWC, and Town water supply well WSW1. December 28, 2022 Terraquest sampled groundwater monitoring wells MW1-4, MW9-14, MW16-22, MWB, and MWC. Town water supply well WSW1 was down for repairs and could not be sampled. APPENDIX C Well IDMW1 6.86 92.47 12.15 87.18 5.25 94.08 7.59 91.74 9.46 89.87 5.19 94.14 7.78 91.55 12.00 87.33 9.27 90.06MW26.23 92.64 11.61 87.26 4.66 94.21 7.00 91.87 8.93 89.94 4.64 94.23 7.19 91.68 11.45 87.42 8.70 90.17 MW3 6.49 92.38 11.73 87.14 5.13 93.74 7.20 91.67 9.06 89.81 4.76 94.11 7.38 91.49 11.58 87.29 8.85 90.02MW47.44 91.88 11.48 87.84 5.13 94.19 5.28 94.04 9.52 89.80 4.53 94.79 7.43 91.89 11.05 88.27 8.29 91.03 MW9 --11.42 87.3 4.43 94.29 6.80 91.92 8.83 89.89 4.58 94.14 7.10 91.62 11.35 87.37 8.60 90.12MW10--11.53 87.03 4.57 93.99 6.74 91.82 8.77 89.79 4.49 94.07 7.05 91.51 11.27 87.29 8.55 90.01 MW11 --12.12 87.18 5.25 94.05 7.55 91.75 9.33 89.97 5.15 94.15 7.73 91.57 12.00 87.3 9.23 90.07MW12--12.74 86.8 5.76 93.78 7.82 91.72 10.00 89.54 5.50 94.04 8.03 91.51 12.35 87.19 9.59 89.95MW13----5.06 93.96 7.00 92.02 9.22 89.8 5.10 93.92 7.60 91.42 11.85 87.17 9.08 89.94MW14----5.61 93.89 7.96 91.54 9.75 89.75 5.61 93.89 8.11 91.39 12.38 87.12 9.59 89.91MW15----6.05 93.58 8.20 91.43 ----8.28 91.35 ---- MW16 ----4.39 94.25 6.64 92 ----7.08 91.56 --8.59 90.05MW17----3.94 93.76 6.29 91.41 ----6.34 91.36 ---- MW18 ----3.24 93.62 5.57 91.29 ----5.64 91.22 ----MW19 ----2.71 92.96 5.05 90.62 ----5.04 90.63 --6.70 88.97MW20----3.45 93.04 5.78 90.71 ----5.78 90.71 10.35 86.14 7.47 89.02Type II ave:6.76 11.72 4.59 6.71 9.21 4.89 7.04 11.66 8.58Well IDMW1 9.05 90.28 10.33 89.00 4.62 94.71 11.01 88.32 11.49 87.84 6.54 92.79 11.24 88.09 9.63 89.70MW2--9.77 89.10 4.1 94.77 12.59 86.28 12.49 86.38 7.55 91.32 10.7 88.17 9.52 89.35 MW3 8.7 90.17 9.92 88.95 4.21 94.66 11.94 86.93 12.4 86.47 7.88 90.99 10.78 88.09 9.9 88.97MW4--9.96 89.36 3.45 95.87 10.60 88.72 12.76 86.56 6.73 92.59 9.12 90.20 9.17 90.15 MW9 8.42 90.3 9.60 89.12 3.63 95.09 11.45 87.27 12.43 86.29 7.09 91.63 10.4 88.32 9.24 89.48MW108.35 90.21 9.60 88.96 3.89 94.67 11.64 86.92 11.04 87.52 7.74 90.82 10.55 88.01 9.79 88.77MW11--10.25 89.05 4.58 94.72 12.28 87.02 13 86.3 7.9 91.4 11.3 88 9.89 89.41MW12--10.68 88.86 5.15 94.39 13.57 85.97 --8.69 90.85 11.58 87.96 10.3 89.24MW13--10.03 88.99 3.38 95.64 12.11 86.91 12.4 86.62 7.79 91.23 11.11 87.91 9.97 89.05 MW14 --10.56 88.94 4.95 94.55 12.67 86.83 13.09 86.41 8.25 91.25 11.64 87.86 10.3 89.2MW16--9.57 89.07 3.36 95.28 11.98 86.66 11.99 86.65 7.26 91.38 10.89 87.75 9.12 89.52 MW17 --8.71 88.99 3.5 94.2 14.11 83.59 11.11 86.59 6.4 91.3 10.02 87.68 8.15 89.55MW18--8.00 88.86 2.65 94.21 10.41 86.45 10.45 86.41 5.69 91.17 9.41 87.45 7.35 89.51 MW19 --7.34 88.33 2.25 93.42 9.73 85.94 9.78 85.89 5.09 90.58 8.86 86.81 6.21 89.46MW20--7.80 88.69 1.75 94.74 10.60 85.89 10.8 85.69 5.45 91.04 9.68 86.81 7.72 88.77MW21------10.91 76.67 11.33 76.25 6.59 80.99 10.14 77.44 8.31 79.27MW22------7.78 88.96 10.58 86.16 5.49 91.25 7.63 89.11 7.79 88.95Type II ave:8.63 9.39 3.59 11.65 11.80 6.95 10.41 9.00 Max ave:11.72Min ave: 4.59 5/16/2018 6/27/2018 12/12/2019 2/26/2021 10/13/2021 12/20/2021 3/15/2022 6/2/2022 12/28/2022 10/3/2017 Incident Name: POCO Shop #1 Incident No. 29796HISTORICAL GROUNDWATER ELEVATION 3/14/2013 11/13/2013 3/17/2015 4/25/2016 9/7/2016 10/19/2016 3/17/2017 Page 1 of 3 6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B+oxygenates6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B+oxygenates6200B+oxygenates6200B+oxygenates6200B6200B6200B6200B6200B+oxygenatesMADEPVPHMADEPVPHMADEPVPH504.16010BWell ID Date Collected Depth to Groundwater (feet) Groundwater Elevation (feet)MW1 1/10/13 8.2 91.13 19,400 35,900 2,680 10,860 5,800 <100 <1,230 301 <<<-<<<<<<<734 <--<1,100 501 <225 <<<---<<<-75,600 <7,000 <7,000 1.1 <5MW13/14/13 6.86 92.47 ------<---<<-<-------<----------------------MW1 11/12/13 11/13: 12.15 87.18 23,100 49,200 70.1 5,824 131 1.49 <48.4 12.2 <<<-<<<0.124 <<0.640 <10.2 <--2.72 <0.0850 5.29 <0.0600 6.80 <0.0920 0.510 <---0.510 <0.0540 0.3 ------MW1 3/17/15 5.25 94.08 17,300 41,000 2,510 20,550 2,780 <4.60 <2,560 746 <18.9 <<-<<17.6 <<<<<472 <--<4.90 <9.50 802 <220 <4.60 <4.45 <3.70 ---<4.45 <2.70 <------MW1 4/25/16 7.59 91.74 10,800 27,500 2,370 12,850 1,800 <46 <1,680 480 <<<-<<<<<<<390 <--<49 235 680 <<32.5 <46 <44.5 <---<<27 <------MW1 10/19/16 5.19 94.14 4,500 10,700 852 4,700 525 7 <644 184 <9.45 <<-<74 <3.1 <3.98 14.5 <2.62 <4.42 150 <--31.2 <249 <1.5 66.8 <2.3 8.5 12.2 ---<2.22 <1.35 <3.48 ------MW1 3/17/17 7.78 91.55 21,400 51,700 3,770 21,100 1,570 32 <2,060 574 <<<-<268 <<<<<<<--324 <964 <222 <<<14.8 ---<<<------MW1 10/3/17 12 87.33 27,200 54,200 3,440 20,400 1,110 <57.5 <1,470 431 <<<<1680 <<220 <<<<<581 <-<1880 81.2 <1,880 <206 <644 <46.2 <1650 <1250 <625 <<<<1250 -----MW1 5/16/18 9.27 90.06 19,800 49,900 3,730 18,090 1,420 < 46.0 <2,290 955 < 140 <<-< 127 350 <<<<<290 <-< 1500 615 <1,830 <755 <725 945 ---<< 27.0 <------MW1 6/27/18 9.05 90.28 18,500 48,700 3,610 18,260 1,420 < 92.0 <2,080 560 < 280 <<<< 253 < 352 <<<<<<160 <-< 3000 < 98.0 << 94.0 << 65.0 << 89.0 1,260 <<<<< 54.0 <<-----MW1 12/12/19 10.33 89 6,390 19,900 1,890 10,750 312 11.2 <0.138 1,640 576 <0.280 <<<2.68 23.1 40.4 <0.124 0.51 1.09 <0.105 0.94 186 <-<3 80.2 <0.190 706 <0.0600 148 7.14 <0.0890 34.9 933 66.5 <1 <0.339 <0.0540 4.13 <2 -----MW1 2/26/21 4.62 94.71 670 2,080 232 1,340 16.7 < 7.00 < 8.40 153 61 < 26.0 << 31.0 < 120 < 18.0 < 100 < 5.00 < 7.10 < 5.00 < 5.00 < 5.00 13.1 <-< 520 6.74 < 30.0 33.2 < 7.60 13.1 < 7.00 < 7.10 < 10.0 137 < 6.00 < 24.0 < 6.30 < 5.80 < 5.00 < 6.80 -----MW1 10/13/21 11.01 88.32 212 750 62.3 322 157 < 1.00 <39.7 11.6 < 13.0 4.23 << 60.0 < 9.00 50.5 << 1.25 <<<3.17 < 1.60 -< 120 < 2.65 <47.7 < 3.80 4.52 < 3.50 < 3.55 <1,800 18.1 < 12.0 <<<< 2.60 < 1.40 -----MW1 12/20/21 11.49 87.84 18.2 31.3 1.8 18.5 54.3 0.42 1.59 6.13 <<<<< 12.0 << 10.0 <<<<<4.7 <-< 24.0 < 0.530 <2.04 < 0.760 < 0.690 <<<620 5.38 < 2.40 <<<<< 0.280 -----MW1 3/15/22 6.54 92.79 1.36 3.42 < 0.500 2.91 19.2 < 0.200 <1.41 0.571 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 <761 < 0.230 < 2.40 <<<<< 0.280 -----MW1 6/2/22 11.24 88.09 1,980 6,380 290 3,050 111 < 10.0 <223 104 <<<<<<<<<<<274 <-<<<<<<<<<<<<<<<<<-----MW1 12/28/22 9.63 89.7 8.86 20.3 1.15 6.2 104 0.411 << 0.820 < 0.560 4.42 < <<<33.2 <<<<<3.25 <<<<<<<<<<<<<<<<<<<-----MW2 3/14/13 6.23 92.64 <0.10 <0.10 <0.10 <0.22 <0.10 <0.10 <<0.10 <0.10 <<<-<<<<<<<<0.10 <--<<1.0 0.22 <<0.10 <<<---<<<-<35 <35 <35 <0.0097 <5MW211/12/13 11/13: 11.61 87.26 <0.119 0.46 <0.0920 0.99 0.35 <0.0920 <<0.103 <0.0870 <<<-<<<0.124 <<<0.105 <<0.172 <--<0.0980 <0.0850 <0.0940 <0.0600 <0.0650 <0.0920 <0.0890 <---<0.0890 <0.0540 <0.139 ------MW2 3/17/15 4.66 94.21 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <0.378 <<-<<0.352 <<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <0.0740 ---<0.0890 1 <------MW2 4/25/16 7 91.87 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<<<<<<0.172 <--<0.0980 <0.190 0.84 <<0.0650 <0.0920 <0.0890 <---<1.09 -------MW2 10/19/16 4.64 94.23 <0.119 0.15 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <0.378 <<-<<0.352 <3.1 <3.98 <0.099 <2.62 <4.42 <0.172 <--<0.0980 <0.190 <0.0940 <0.06 <0.0650 <0.0920 <0.0890 <0.074 ---<0.089 0.29 <0.139 ------MW2 3/17/17 7.19 91.68 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<--<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------MW2 10/3/17 11.45 87.42 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<2.48 <<<<<<0.172 <-<3.00 <0.0980 <<0.0940 <<0.0650 <<0.0890 <0.0740 ---<<<------MW2 5/16/18 8.7 90.17 < 0.119 < 0.0570 < 0.0920 < 0.122 < 0.169 < 0.0920 << 0.103 < 0.0870 < 0.280 <<-< 0.253 2.19 <<<<<< 0.160 <-< 3.00 < 0.0980 << 0.0940 << 0.0650 << 0.0890 < 0.0740 ---<0.5 <------MW2 12/12/19 9.77 89.1 2.54 10.4 1.23 6.3 <0.169 <0.0920 <1.17 <0.0870 < 0.280 <<-< 0.253 <0.139 <<<<<<0.160 <-< 3.00 <0.0980 <0.190 4.16 <0.0600 <0.0650 <0.0920 <0.0890 <0.0740 ---<0.339 <0.0540 <0.160 ------MW2 2/26/21 4.1 94.77 < 0.380 < 0.410 < 0.500 < 1.60 < 0.740 < 0.700 < 0.840 < 0.820 < 0.560 < 2.60 << 3.10 < 12.0 < 1.80 < 10.0 < 0.500 < 0.710 < 0.500 < 0.500 < 0.500 < 0.600 <-< 52.0 < 0.530 < 3.00 < 1.00 < 0.760 < 0.690 < 0.700 < 0.710 < 1.00 < 4.50 < 0.600 < 2.40 < 0.630 < 0.580 < 0.500 < 0.680 -----MW2 10/13/21 12.59 86.28 < 0.130 2.14 < 0.500 < 1.60 4.77 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 << 12.0 < 1.80 < 10.0 << 0.250 <<<< 0.600 < 0.320 -< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<< 0.520 < 0.280 -----MW2 12/20/21 12.49 86.38 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 <<<<< 12.0 << 10.0 <<<<<< 0.600 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 <<<< 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW2 3/15/22 7.55 91.32 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW2 6/2/22 10.7 88.17 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<-<<<<<<<<<<<<<<<<<-----MW2 12/28/22 9.52 89.35 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<<41.7 <<<<<<<<<<<<<<<<-----MW3 3/14/13 6.49 92.38 15,700 47,400 3,240 16,700 2,870 <100 <1,780 433 <<<-<<<<<<<<100 <--<<1,000 688 <256 <<<---<<<-39,400 <7,000 <7,000 4.4 23.4MW311/12/13 11/13: 11.73 87.14 13,900 44,800 3,190 16,980 109 8.04 <<51.5 59.4 <<<-<<<0.124 <<<0.105 <<0.172 <--10.3 <0.0850 65.5 <0.0600 26.8 1.15 0.860 <---0.860 <0.0540 <0.139 ------MW3 3/17/15 5.13 93.74 13,100 47,200 4,730 23,350 699 38.3 <3,700 632 <3.78 <<-<<3.52 <<<<<<1.72 <--125 <1.90 993 <352 <0.920 25.6 40 ---<0.890 <0.540 <------MW3 4/25/16 7.2 91.67 8,180 31,900 2,950 16,460 500 <46 <2,290 685 <<<-<<<<<<<<86 <--<49 <95 965 <245 <46 <44.5 <---<<27 <------MW3 10/19/16 4.76 94.11 9,420 34,400 2,320 14,600 242 15 <1,920 546 <9.45 <<-<215 <3.1 <3.98 <2.48 <2.62 <4.42 <4.3 <--94.2 <4.75 882 <1.5 212 <2.3 26 30.8 ---<2.22 <1.35 <3.48 ------MW3 3/17/17 7.38 91.49 11,300 48,700 3,650 22,900 1,610 44 <2,520 772 <<<-<1,000 <<<<<<<--588 <1,680 <280 <<<29.6 ---<<<------MW3 10/3/17 11.58 87.29 15,800 49,200 3,300 20,800 <84.5 <46.0 <2,100 530 <<<<1340 <<176 <<<<<<86.0 <-<1500 100 <1,620 <290 <525 <37.0 <1320 <1000 <500 <<<<1000 -----MW3 5/16/18 8.85 90.02 8,710 45,500 3,120 17,620 < 84.5 < 46.0 <2,510 1,040 < 140 <<-< 127 < 176 <<<<<< 80.0 <-< 1500 600 <1,840 <700 << 44.5 < 37.0 ---<< 27.0 <------MW3 6/27/18 8.7 90.17 7,690 41,500 3,030 17,630 < 169 < 92.0 <2,270 650 < 280 <<<< 253 < 352 <<<<<< 160 <-< 3000 < 98.0 << 94.0 << 65.0 << 89.0 < 74.0 <<<<< 54.0 <<-----MW3 12/12/19 9.92 88.95 7,260 32,300 2,700 15,740 65.5 12.1 <2,420 555 <<<<<<0.352 <<<<<<<-<94.7 <782 <261 10.4 6.23 32.5 2,290 45.3 <<<<<-----MW3 2/26/21 4.21 94.66 3,490 18,200 1,440 7,450 < 148 < 140 < 168 941 258 < 520 << 620 < 2400 < 360 < 2000 < 100 < 142 < 100 < 100 < 100 < 120 <-< 10400 < 106 < 600 479 < 152 < 138 < 140 < 142 < 200 1,120 < 120 < 480 < 126 < 116 < 100 < 136 -----MW3 10/13/21 11.94 86.93 148 994 165 1,590 67.1 1.3 <520 147 < 13.0 < 2.85 << 60.0 < 9.00 < 50.0 << 1.25 <<<< 3.00 < 1.60 -< 120 12.5 <481 < 3.80 37.3 < 3.50 < 3.55 <1,400 17.5 < 12.0 <<<< 2.60 < 1.40 -----MW3 12/20/21 12.4 86.47 39.7 115 16.7 88.8 22.8 3.76 31.3 10.9 <<<<< 12.0 <12.5 <<<<<< 0.600 <-< 24.0 0.835 <13.5 0.82 3.11 <<<1,190 5.77 < 2.40 <<<<< 0.280 -----MW3 3/15/22 7.88 90.99 1.4 3.93 0.671 4.82 4.12 < 0.200 <0.852 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 <48.5 0.265 < 2.40 <<<<< 0.280 -----MW3 6/2/22 10.78 88.09 0.884 1.27 1.18 5 1.39 < 0.200 <2.02 0.679 <<<<<<<<<<<<<-<<<<<<<<<<<<<<<<<-----MW3 12/28/22 9.9 88.97 < 0.130 < 0.410 < 0.500 < 1.60 2.84 <<< 0.820 < 0.560 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW4 3/14/13 7.44 91.88 4,190 40,200 3,350 16,700 <100 <100 <1,750 421 <<<-<<<<<<<<100 <--<<1,000 762 <233 <<<---<<<-20,300 4,910 7,060 1.3 5.2MW411/12/13 11/13: 11.48 87.84 4,400 35,100 3,610 17,490 3.57 0.24 <2,640 59.1 <<<-<<<0.124 <<<0.105 <<0.172 <--10.6 <0.0850 69.3 <0.0600 28.4 1.19 0.770 <---0.770 <0.0540 <0.139 ------MW4 3/17/15 5.13 94.19 4,260 31,600 4,330 21,370 26.3 <2.30 <2,370 619 <9.45 <<-<<8.80 <<<<<<4.30 <--102 <4.75 896 <286 <2.30 <2.23 <1.85 ---<2.23 <1.35 <------MW4 4/25/16 5.28 94.04 2,070 16,400 3,300 12,950 <84.5 <46 <2,640 740 <<<-<<<<<<<<86 <--<49 <95 1,160 <290 <46 <44.5 <---<<27 <------MW4 10/19/16 4.53 94.79 1,740 16,100 3,080 13,300 10.8 <2.3 31.8 3,230 744 <9.45 <<-<115 <3.1 <3.98 <2.48 <2.62 <4.42 <4.3 <--123 <4.75 1,240 <1.5 275 <2.3 27 46.2 ---<2.22 <1.35 <3.48 ------MW4 3/17/17 7.43 91.89 1,960 15,900 3,980 19,000 <33.8 <18.4 <3,450 886 <<<-<484 <<<<<<<--334 <1,220 <332 <<<14.8 ---<<<------MW4 10/3/17 11.05 88.27 3,030 19,700 3,870 17,500 <33.8 <18.4 <3,330 766 <<<<536 <<70.4 <<<<<<34.4 <-<600 98 <1,110 <302 <228 282 <528 <400 <200 <<<<400 -----MW4 5/16/18 8.29 91.03 2,370 21,900 4,190 15,970 < 33.8 < 18.4 <3,240 976 < 56.0 <<-< 50.6 < 70.4 <<<<<< 32.0 <-< 600 318 <944 <552 <294 406 ---<< 10.8 <------MW4 12/12/19 9.96 89.36 1,320 14,700 2,110 9,570 <0.169 0.51 <1,400 640 <<<<<<<<<<<<<-<103 <1,130 <294 12.4 6.7 40 495 <<<<<<-----MW4 2/26/21 3.45 95.87 537 3,000 1,410 6,170 < 18.5 < 17.5 < 21.0 1,950 502 < 65.0 << 77.5 < 300 < 45.0 < 250 < 12.5 < 17.8 < 12.5 < 12.5 < 12.5 < 15.0 <-< 1300 52.2 < 75.0 517 < 19.0 113 < 17.5 < 17.8 < 25.0 152 < 15.0 < 60.0 < 15.8 < 14.5 < 12.5 < 17.0 -----MW4 10/13/21 10.6 88.72 624 7,750 1,490 8,820 < 11.0 < 10.0 <1,620 462 < 130 < 28.5 << 600 < 90.0 < 500 << 12.5 <<<< 30.0 < 16.0 -< 1200 59.4 <623 < 38.0 152 < 35.0 < 35.5 << 225 < 11.5 < 120 <<<< 26.0 < 14.0 -----MW4 12/20/21 12.76 86.56 452 3,530 663 4,040 < 4.40 < 4.00 778 225 <<<<< 240 << 200 <<<<<< 12.0 <-< 480 26.3 <429 < 15.2 65.4 <<<656 < 4.60 < 48.0 <<<<< 5.60 -----MW4 3/15/22 6.73 92.59 99.9 1,280 109 7,710 35 < 0.200 <1,330 644 32.4 < 0.570 151 < 12.0 47.7 267 < 0.500 <<<<< 1.00 <-< 24.0 12 <346 < 0.760 20.7 2.84 6.09 <424 9.19 < 2.40 <<<<< 0.280 -----MW4 6/2/22 9.12 90.2 256 3,110 162 10,600 20.3 < 10.0 <1,120 412 <<199 <<<<<<<<<<-<<<384 <<<<<419 <<<<<<<-----MW4 12/28/22 9.17 90.15 168 867 269 4,090 18.3 < 1.00 <643 263 17.6 <<<<81 <<<<<<<<<13.6 <315 12.3 31.3 <<<<<<<<<<<-----TMW5 10/25/13 --6,090 10,400 756 3,310 8,610 <25 <356 80.6 <<<-<<<25 <<<25 <<25 <-<<25 <27 197 <25 58.8 <25 <25 <---<25 <25 <25 -7,870 <1,800 <1,800 0.82 26.9TMW610/25/13 --0.72 1.9 0.19 0.46 0.28 <0.10 <<0.10 <0.10 <<<-<<<0.10 <<<0.10 <<0.10 <-<<0.10 0.22 <0.15 <0.10 <0.10 <0.10 <0.10 <---<0.10 0.87 0.29 -<35 <35 <35 <0.0096 408TMW710/25/13 --9.3 1.7 1.3 0.72 23.5 0.12 <0.24 <0.10 <<<-<<<0.10 <<<0.10 <0.26 <-<3 <0.11 6.7 0.17 0.69 <0.10 <0.10 <---<0.10 <0.10 <0.10 -57.7 <35 54.1 <0.0097 11.9TMW810/25/13 --0.28 1.3 0.16 0.36 <0.10 <0.10 <0.11 <0.10 <<<-<<<0.10 <<<0.10 <0.23 <-<<0.10 <0.11 0.28 <0.10 <0.10 <0.10 <0.10 <---<0.10 <0.10 <0.10 -<35 <35 <35 <0.0096 <5MW911/12/13 11/13: 11.42 87.3 1,540 2,380 297 1,143 1,090 <1.84 <280 76.2 <<<-<<<2.48 <<<2.10 <<3.44 <--24.8 <1.70 24.4 <1.20 54.2 5.2 4.2 <---4.2 <1.08 <2.78 -710 680 600 0.719 <3.30MW93/17/15 4.43 94.29 797 1,390 282 1,044 783 <2.30 <216 67.8 76.3 <<-<376 <<<<<<4.30 <--35.3 10 64.3 <35 <2.30 <2.23 <1.85 ---<2.23 <1.35 <------MW9 4/25/16 6.8 91.92 496 818 202 692 487 <1.84 <162 44.8 <<<-<<<<<<<<3.44 <--14.6 <3.80 109 <28.2 <1.84 <1.78 <---<<1.08 <------MW9 10/19/16 4.58 94.14 364 640 66.7 339 314 1.6 <1.38 39.7 13.4 <3.78 <<-<18.7 <1.24 <1.59 <0.99 <1.05 <1.77 <1.72 <--2.5 <1.9 26.5 <0.6 5.2 <0.92 <0.89 <0.74 ---<0.89 <0.54 <1.39 ------MW9 3/17/17 7.1 91.62 731 1,130 115 634 291 2.4 <62 21.2 <<<-<141 <<<<<<<--15.3 <46.2 <8.1 <<<0.740 ---<<<------MW9 10/3/17 11.35 87.37 278 543 87.2 519 62.2 <2.30 <89.2 30 <<<-<<8.80 <<<<<<4.30 <-below RL: 126 4.25 <83 <12 <27.2 <1.85 ---<<<------MW9 5/16/18 8.6 90.12 1,220 2,930 287 1,305 714 8 <192 67.8 < 2.80 <<-< 2.53 53.2 <<<<<< 1.60 <-8,680 18 <56.8 <36.4 <15 < 0.740 ---<< 0.540 <------MW9 6/27/18 8.42 90.3 454 997 95.3 512 168 < 0.920 <76.5 23.1 < 2.80 <<<< 2.53 10.4 <<<<<< 1.60 <-< 30.0 < 0.980 <39.3 <8.2 << 0.890 < 0.740 <<<<< 0.540 <<-----MW9 12/12/19 9.6 89.12 2,360 4,270 661 3,360 1,740 16 <599 167 <<<<6.24 23.7 <<<<<<<-<28.8 <351 <0.0600 83.6 3.89 3.16 3.77 3,280 27.2 <<0.339 <<<-----MW9 2/26/21 3.63 95.09 951 1,570 128 574 550 < 7.00 < 8.40 71.7 22.7 < 26.0 << 31.0 < 120 < 18.0 139 < 5.00 < 7.10 < 5.00 < 5.00 < 5.00 < 6.00 <-< 520 < 5.30 < 30.0 30.3 < 7.60 8.43 < 7.00 < 7.10 < 10.0 424 11.6 < 24.0 < 6.30 < 5.80 < 5.00 < 6.80 -----MW9 10/13/21 11.45 87.27 1,410 4,060 333 1,600 830 7.54 <326 113 < 26.0 < 5.70 << 120 < 18.0 < 100 << 2.50 <<<< 6.00 27.6 -< 240 14.9 <137 < 7.60 44 < 7.00 < 7.10 <854 < 2.30 < 24.0 <<<< 5.20 < 2.80 -----MW9 12/20/21 12.43 86.29 140 771 109 1,440 250 < 4.00 274 145 <<<<< 240 << 200 <<<<<< 12.0 <-58,600 < 10.6 <41.8 < 15.2 14.1 <<<305 < 4.60 < 48.0 <<<<< 5.60 -----MW9 3/15/22 7.09 91.63 771 1,230 83.3 546 669 9.32 <45.3 26 < 13.0 < 2.85 < 7.00 < 60.0 < 9.00 58.1 < 2.50 <<<<5.7 <-< 120 < 2.65 <9.3 < 3.80 3.85 < 3.50 < 3.55 <815 14.7 < 12.0 <<<<< 1.40 -----MW9 6/2/22 10.4 88.32 1,500 2,760 169 1,060 611 5.21 <119 49.8 144 <<<<<<<<<<<<-<<<<<<<<<358 61.7 <<<<<<-----MW9 12/28/22 9.24 89.48 345 691 43 210 134 1.93 <25 8.81 71.2 <<<<22.4 <<<<<9.35 <<1,360 1.3 <19 <3.66 <<<<<<<<<<<-----Notes:1. All results in µg/L2. Bold denotes a compound detection 3. Shading denotes a 2L Standard violation4. Italics indicates a GCL violation5. < - denotes less than sample detection limit6. * It is believed that the 4/25/16 MW12 and MW16 samples were switched at some point following sampling and generation of the lab report. Monitoring well MW12 was resampled on 5/26/16 to confirm the anomalous data. Odors noted from the purged water from MW12 confirmed that well is contaminated as it has been historically. The results are listed correctly here. 7. ** The 2L Standards listed for the C9-C10 Aromatic carbon fraction class are actually for the C9-C22 Aromatic caron fraction class. 2-HexanoneEthyl tert-butyl etherBromoformC9-C12 AliphaticsCarbon Tetrachloridesec-ButylbenzeneC9-C10 AromaticsTrichloroethylenetert-ButylbenzeneChlorobenzenen-ButylbenzeneLeadEDBn-Propylbenzene3,3-Dimethyl-1-butanolStyrenetert-Amyl alcoholChloroformtert-Amyl methyl Ethertert-Butyl formate4-Methyl-2-pentanone (MIBK)Analytical Method TolueneEthylbenzeneEthanol2-ChlorotolueneBenzeneChlorodibromomethane1,3,5-Trimethylbenzene1,2,3-TrichloropropaneChloromethaneTetrachloroethene (PCE)DibromochloromethaneIsopropylbenzeneContaminant of Concern AcetoneNaphthalene1,2,4-Trimethylbenzene4-IsopropyltolueneMethylene ChlorideBromodichloromethane HISTORICAL SUMMARY OF GROUNDWATER SAMPLING RESULTS Incident Name: Poco Shop #1 Incident No. 29796 MTBETotal XylenesC5-C8 AliphaticsIPETrichlorofluoromethane2-Butanone (MEK) Page 2 of 3 6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B+oxygenates6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B+oxygenates6200B+oxygenates6200B+oxygenates6200B6200B6200B6200B6200B+oxygenatesMADEPVPHMADEPVPHMADEPVPH504.16010BWell ID Date Collected Depth to Groundwater (feet) Groundwater Elevation (feet)2-HexanoneEthyl tert-butyl etherBromoformC9-C12 AliphaticsCarbon Tetrachloridesec-ButylbenzeneC9-C10 AromaticsTrichloroethylenetert-ButylbenzeneChlorobenzenen-ButylbenzeneLeadEDBn-Propylbenzene3,3-Dimethyl-1-butanolStyrenetert-Amyl alcoholChloroformtert-Amyl methyl Ethertert-Butyl formate4-Methyl-2-pentanone (MIBK)Analytical Method TolueneEthylbenzeneEthanol2-ChlorotolueneBenzeneChlorodibromomethane1,3,5-Trimethylbenzene1,2,3-TrichloropropaneChloromethaneTetrachloroethene (PCE)DibromochloromethaneIsopropylbenzeneContaminant of Concern AcetoneNaphthalene1,2,4-Trimethylbenzene4-IsopropyltolueneMethylene ChlorideBromodichloromethane HISTORICAL SUMMARY OF GROUNDWATER SAMPLING RESULTS Incident Name: Poco Shop #1 Incident No. 29796 MTBETotal XylenesC5-C8 AliphaticsIPETrichlorofluoromethane2-Butanone (MEK)MW10 11/12/13 11/13: 11.53 87.03 3,050 4,770 46.7 204 2,340 2.16 <42.7 11.5 <<<-<<<0.124 <<<0.105 <<0.172 <--2.70 <0.0850 7.35 <0.0600 7.37 0.49 0.28 <---0.28 <0.0540 <0.139 -1,240 1,020 1,000 1.39 <3.30MW103/17/15 4.57 93.99 3,110 5,100 604 2,666 1,670 43.4 <483 147 <3.78 <<-<<3.52 <<<<<<1.72 <--24.6 <1.90 251 <48.7 <0.920 <0.890 <0.740 ---<0.890 <0.540 <------MW10 4/25/16 6.74 91.82 6,700 <2.85 1,010 4,750 4,180 63.5 <790 216 <<<-<<<<<<<<8.60 <--<4.90 30 318 <105 <4.60 <4.45 <---<<2.70 <------MW10 10/19/16 4.49 94.07 4,630 5,210 737 4,750 1,690 28.4 <1.38 737 214 <3.78 <<-<<3.52 <1.24 <1.59 <0.99 <1.05 <1.77 <1.72 <--26.2 <1.9 364 <0.6 54.9 <0.92 9.3 9.9 ---<0.89 <0.54 <1.39 ------MW10 3/17/17 7.05 91.51 7,510 15,800 1,200 7,260 1,720 55 <945 290 <<<-<77 <<<<<<<--156 <450 <121 <<<7.40 ---<<<------MW10 10/3/17 11.27 87.29 10,000 12,600 1,040 5,500 1,260 60 <606 170 <<<<536 <<70.4 <<<<<<34.4 <-<600 36 <628 <106 <<17.8 <14.8 <528 <400 <200 <<<<400 -----MW10 5/16/18 8.55 90.01 7,990 14,400 1,090 5,360 1,610 80 <860 372 392 <<-< 50.6 < 70.4 <<<<<< 32.0 <-< 600 244 <740 <318 << 17.8 < 14.8 ---<< 10.8 <------MW10 6/27/18 8.35 90.21 4,780 < 11.4 664 3,320 1,040 < 18.4 <462 124 < 56.0 <<<< 50.6 < 70.4 <<<<<< 32.0 <-< 600 < 19.6 << 18.8 << 13.0 << 17.8 < 14.8 <<<<< 10.8 <<-----MW10 12/12/19 9.6 88.96 8,220 14,300 1,300 6,940 1,910 62.3 <1,170 308 <<<<<<<<<<<<<-<55.5 <470 <149 7.22 4.72 13.5 <<<<<<<-----MW10 2/26/21 3.89 94.67 1,270 1,780 124 775 370 < 14.0 < 16.8 110 42.4 < 52.0 << 62.0 < 240 < 36.0 < 200 < 10.0 < 14.2 < 10.0 < 10.0 < 10.0 < 12.0 <-< 1040 < 10.6 < 60.0 48.3 < 15.2 < 13.8 < 14.0 < 14.2 < 20.0 438 20.6 < 48.0 < 12.6 < 11.6 < 10.0 < 13.6 -----MW10 10/13/21 11.64 86.92 11,600 28,300 2,420 13,100 1,430 62.1 <1,930 505 < 260 < 57.0 << 1200 < 180 < 1000 << 25.0 <<<< 60.0 < 32.0 -< 2400 81.8 <667 < 76.0 214 < 70.0 < 71.0 <2,650 500 < 240 <<<< 52.0 < 28.0 -----MW10 12/20/21 11.04 87.52 1,050 1,330 109 649 1,030 16.2 98.4 37.1 <<<<< 120 << 100 <<<<<< 6.00 <-< 240 < 5.30 <53.4 < 7.60 < 6.90 <<<1,210 37.5 < 24.0 <<<<< 2.80 -----MW10 3/15/22 7.74 90.82 1,740 5,840 587 4,680 1,470 74.2 <657 307 80.1 < 11.4 < 28.0 < 240 < 36.0 380 < 10.0 <<<<< 20.0 <-< 480 15.9 <223 < 15.2 34.3 < 14.0 < 14.2 <1,320 176 < 48.0 <<<<< 5.60 -----MW10 6/2/22 10.55 88.01 7,700 15,300 886 5,070 713 41.7 <453 145 <<<<<<<<<<<<<-<<<<<<<<<<108 <<<<<<-----MW10 12/28/22 9.79 88.77 6,780 19,500 1,630 8,610 226 28.3 <1,330 392 <<<<<<<<<<<<<<<57.1 <1,010 <157 <<<<<<<<<<<-----MW11 11/12/13 11/13: 12.12 87.18 0.790 3.32 0.780 2 <0.169 <0.0920 <0.47 0.12 <<<-<<0.28 <<<0.105 <1.07 <--<0.0980 <0.0850 <0.0940 <0.0600 0.3 0.29 <0.0890 <---<0.0890 <0.0540 <0.139 -110 70 60 <0.00599 <3.30MW113/17/15 5.25 94.05 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <0.378 <<-<<0.352 <<<<<<0.172 <--1.69 <0.190 <0.0940 <<0.0650 1.26 <0.0890 <0.0740 ---1 <0.0540 <------MW11 4/25/16 7.55 91.75 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<<<<<<0.172 <--2.07 <0.190 <0.0940 <<0.0650 1.6 <0.0890 <---<<0.0540 <------MW11 10/19/16 5.15 94.15 <0.119 0.16 <0.0920 0.18 <0.169 <0.0920 <0.138 <0.103 <0.0870 <0.378 <<-<<0.352 <0.124 <0.159 <0.099 <0.105 <0.177 <0.172 <--<0.098 <0.190 <0.0940 <0.06 <0.0650 <0.0920 <0.0890 <0.074 ---<0.0890 <0.0540 <0.139 ------MW11 3/17/17 7.73 91.57 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<--2.63 <<0.0940 <<0.0650 <<<0.0740 ---<<<------MW11 10/3/17 12 87.3 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<1.72 <<<<<<0.172 <-<3.00 <0.0980 <<0.0940 <<0.0650 <<0.0890 <0.0740 ---<<<------MW11 5/16/18 9.23 90.07 < 0.119 < 0.0570 < 0.0920 < 0.122 < 0.169 < 0.0920 << 0.103 < 0.0870 < 0.280 <<-< 0.253 0.77 <<<<<< 0.160 <-< 3.00 < 0.0980 << 0.0940 << 0.0650 << 0.0890 < 0.0740 ---<< 0.0540 <------MW11 12/12/19 10.25 89.05 3.51 9.08 1.05 5.14 <0.169 <0.0920 <1.2 < 0.0870 < 0.280 <<-< 0.253 <<<<<<<<-< 3.00 < 0.0980 <5.78 << 0.0650 << 0.0890 <---<< 0.0540 <------MW11 2/26/21 4.58 94.72 < 0.380 < 0.410 < 0.500 < 1.60 < 0.740 < 0.700 < 0.840 < 0.820 < 0.560 < 2.60 << 3.10 < 12.0 < 1.80 < 10.0 < 0.500 < 0.710 < 0.500 < 0.500 < 0.500 < 0.600 <-< 52.0 < 0.530 < 3.00 < 1.00 < 0.760 < 0.690 < 0.700 < 0.710 < 1.00 < 4.50 < 0.600 < 2.40 < 0.630 < 0.580 < 0.500 < 0.680 -----MW11 10/13/21 12.28 87.02 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 << 12.0 < 1.80 < 10.0 << 0.250 <<<< 0.600 < 0.320 -< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<< 0.520 < 0.280 -----MW11 12/20/21 13 86.3 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 <<<<< 12.0 << 10.0 <<<<<< 0.600 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 <<<< 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW11 3/15/22 7.9 91.4 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW11 6/2/22 11.3 88 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<-<0.562 <<<<1.1 <<<<<<<<<<-----MW11 12/28/22 9.89 89.41 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW12 11/12/13 11/13: 12.74 86.8 410 68.5 169 64.1 183 1.27 <7.94 3.24 <<<-<<<0.124 <<<0.105 <1.79 <--7.42 <0.0850 32.4 <0.0600 15.8 0.900 0.26 <---0.26 <0.0540 <0.139 -150 180 140 <0.00597 <3.30MW123/17/15 5.76 93.78 1,180 437 1,100 1,482 470 2.93 <507 204 <0.378 <<-<<0.352 <<<<<<0.0172 <--57.7 <0.190 285 <157 8.67 4.2 8.16 ---<0.0890 0.34 <------*MW12 4/25/16 7.82 91.72 1,270 1,910 1,390 3,430 441 4.11 <855 291 <<<-<<<<<<<14.1 <--67.4 <0.190 331 <182 9.53 4.18 <---<<0.0540 <------MW12 5/26/16 --1,400 2,980 1,650 5,180 396 <0.92 <1,250 320 <<<-<<<<<<<<1.72 <--77.3 <1.9 349 <210 960 <0.89 13 ---<<0.54 <------MW12 10/19/16 5.5 94.04 892 1,090 992 2,130 311 2.9 <1.38 552 203 <3.78 <<-<151 <1.12 <1.59 <0.99 <1.05 <1.77 8.7 <--59.9 <1.9 265 16.7 130 <0.92 6.5 7.7 ---<0.89 <0.54 <1.39 ------MW12 3/17/17 8.03 91.51 1,400 3,370 1,190 5,440 376 4.75 <894 264 <<<-<59 <<<<<<<--61.5 <310 <128 <<38.8 ---<<<------MW12 10/3/17 12.35 87.19 2,250 4,390 2,260 6,480 221 <4.60 <1,270 352 <<<<134 <<17.6 <<<<<24 <-<150 63 <360 <218 <60 69 1,860 <100 <50.0 <<<<100 -----MW12 5/16/18 9.59 89.95 1,090 139 947 1,187 336 < 4.60 <543 210 < 14.0 <<-< 12.7 < 17.6 <<<<<< 8.00 <-< 150 83 <220 <152 <77 < 3.70 ---<< 2.70 <------MW12 12/12/19 10.68 88.86 891 446 981 2,366 212 3.12 <694 182 <<<<2.54 <<<<<<<<-<43.1 <252 <107 5.96 3.09 6.4 547 8.72 <<0.65 <<-----MW12 2/26/21 5.15 94.39 39.4 32.2 4.47 172 190 2.02 < 1.68 24.5 9.47 < 5.20 << 6.20 < 24.0 < 3.60 < 20.0 < 1.00 < 1.42 < 1.00 < 1.00 < 1.00 8.42 <-< 104 < 1.06 < 6.00 4.78 < 1.52 < 1.38 < 1.40 < 1.42 < 2.00 708 7.27 < 4.80 < 1.26 < 1.16 < 1.00 < 1.36 -----MW12 10/13/21 13.57 85.97 2.18 9.71 1.91 2.77 18.5 < 0.200 <1.44 0.673 < 2.60 < 0.570 << 12.0 < 1.80 < 10.0 << 0.250 <<<1.55 < 0.320 -< 24.0 < 0.530 <2.96 < 0.760 < 0.690 < 0.700 < 0.710 <17.9 < 0.230 < 2.40 <<<0.552 < 0.280 -----MW12 12/20/21 --3.47 7.57 1.26 17.7 17.7 0.381 3.42 1.48 <<<<< 12.0 << 10.0 <<<<<0.972 <-< 24.0 < 0.530 <4.38 < 0.760 < 0.690 <<<93.7 2.83 < 2.40 <<<<< 0.280 -----MW12 3/15/22 8.69 90.85 < 0.130 < 0.410 < 0.500 < 1.60 11 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<2.09 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW12 6/2/22 11.58 87.96 < 0.130 < 0.410 < 0.500 < 1.60 8.41 < 0.200 <<<5.89 <<<<<<<<<<1.37 <-<<<<<<<<<<<<<<<<<-----MW12 12/28/22 10.3 89.24 < 0.130 < 0.410 < 0.500 < 1.60 3.94 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW13 8/22/14 11.93 87.09 6,770 18,500 1,490 7,320 6,490 120 <2,270 501 <<<-<<<1.24 <<<1.05 <<1.72 <--96.7 <0.850 706 <0.600 256 <0.920 <0.890 <---<0.890 <0.540 <1.39 -4,690 4,340 4,740 0.994 <3.30MW133/17/15 5.06 93.96 1,770 5,360 627 2,590 684 8.8 <560 167 <3.78 <<-<<3.52 <<<<<<1.72 <--25.5 <1.90 139 <58.2 <0.920 <0.890 <0.740 ---<0.890 <0.540 <------MW13 4/25/16 7 92.02 4,550 13,900 1,900 7,500 4,290 100 <1,680 490 <<<-<<<<<<<<8.60 <--82 <9.50 527 <226 <4.60 <4.45 <---<<2.70 <------MW13 10/19/16 5.1 93.92 3,000 4,220 951 4,110 2,620 54.7 <1.38 773 211 <3.78 <<-<<3.52 <1.24 <1.59 <0.99 <1.05 <1.77 <1.72 <--49.6 12.9 242 17.3 110 6.6 6.5 7.7 ---<0.89 <0.54 <1.39 ------MW13 3/17/17 7.6 91.42 9,110 19,700 3,340 15,300 1,990 63 <2,600 675 <<<-<201 <<<<<<<--199 <744 <301 <<148 ---<<<------MW13 10/3/17 11.85 87.17 12,800 29,200 3,150 16,100 2,280 178 <2,230 530 <<<<670 <<88.0 <<<<<<43.0 <-<750 92.5 <875 <265 <278 330 6,960 below RL: 652 <250 <<<<500 -----MW13 5/16/18 9.08 89.94 664 2,080 936 2,971 133 9.78 <986 317 < 0.280 <<-4.06 1.16 <<<<<< 0.160 <-< 3.00 81.4 <206 <136 <6.57 8.21 ---<< 0.0540 <------MW13 12/12/19 10.03 88.99 2,270 6,320 758 3,670 892 52.2 <676 180 < 0.280 <<<<<<<<<<<<-< 3.00 32.6 <359 <79.2 4.37 3.49 6.97 947 <<<<<<-----MW13 2/26/21 3.38 95.64 1.76 23.7 37.4 182 < 0.740 < 0.700 < 0.840 84 23.1 < 2.60 << 3.10 < 12.0 < 1.80 < 10.0 < 0.500 < 0.710 < 0.500 < 0.500 < 0.500 < 0.600 <-< 52.0 1.83 < 3.00 11 1.83 5.5 < 0.700 < 0.710 < 1.00 < 4.50 < 0.600 < 2.40 < 0.630 < 0.580 < 0.500 < 0.680 -----MW13 10/13/21 12.11 86.91 123 229 91.5 116 78.4 2.37 <59.1 20.4 < 5.20 < 1.14 << 24.0 < 3.60 < 20.0 << 0.500 <<<< 1.20 < 0.640 -< 48.0 4.02 <52.5 < 1.52 9.83 < 1.40 < 1.42 <92.7 9.92 < 4.80 <<<< 1.04 < 0.560 -----MW13 12/20/21 12.4 86.62 5,130 11,900 1,260 5,630 1,170 72.2 897 238 <<<<< 300 << 250 <<<<<< 15.0 <-< 600 48.3 <439 < 19.0 128 <<<2,650 469 < 60.0 <<<<< 7.00 -----MW13 3/15/22 7.79 91.23 332 227 266 1,150 88.3 7.58 <423 115 < 13.0 < 2.85 < 7.00 < 60.0 < 9.00 < 50.0 < 2.50 <<<<7.47 <-< 120 9.86 <108 6.92 17.3 < 3.50 < 3.55 <307 18.8 < 12.0 <<<<< 1.40 -----MW13 6/2/22 11.11 87.91 157 252 370 2,490 33.7 < 2.00 <688 687 <<<<<<<<<<<<<-<16.4 <129 <54 <<<<<<<<<<<-----MW13 12/28/22 9.97 89.05 153 69.4 207 167 79.3 1.59 <87.7 25.4 <<<<<<<<<<<<<<<13 <76.4 4.49 30.8 2.36 1.43 <<<<<<<<<-----MW14 8/22/14 12.45 87.05 0.81 <0.0570 <0.0920 <0.298 4.56 <0.0920 <<0.103 <0.0870 <<<-<<<0.124 <<<0.105 <0.87 <--<0.0980 <0.0850 <0.0940 <0.0600 <0.0650 <0.0920 <0.0890 <---<0.0890 <0.0540 <0.139 -<0.0150 <0.0150 <0.00500 <0.00650 <3.30MW143/17/15 5.61 93.89 <0.119 <0.0570 <0.0920 <0.298 0.530 <0.0920 <<0.103 <0.0870 <0.378 <<-<<0.352 <<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <0.0740 ---<0.0890 <0.0540 <------MW14 4/25/16 7.96 91.54 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <---<<0.0540 <------MW14 10/19/16 5.61 93.89 <0.119 0.46 0.13 0.56 <0.169 <0.0920 <0.138 <0.103 <0.0870 <0.378 <<-<<0.352 <0.124 <0.159 <0.099 <0.105 <0.177 <0.172 <--<0.098 <0.190 <0.0940 <0.06 <0.0650 <0.0920 <0.0890 <0.074 ---<0.0890 <0.0540 <0.139 ------MW14 3/17/17 8.11 91.39 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<--<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------MW14 10/3/17 12.38 87.12 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<0.172 <-<3.00 <0.0980 <<0.0940 <<0.0650 <<0.0890 <0.0740 ---<<<------MW14 5/16/18 9.59 89.91 < 0.119 < 0.0570 < 0.0920 < 0.122 < 0.169 < 0.0920 << 0.103 < 0.0870 < 0.280 <<-< 0.253 1.78 <<<<<< 0.160 <-< 3.00 < 0.0980 << 0.0940 << 0.0650 << 0.0890 < 0.0740 ---<< 0.0540 <------MW14 12/12/19 10.56 88.94 1.99 5.9 0.84 3.59 <0.169 <0.0920 <0.89 < 0.0870 < 0.280 <<-< 0.253 <0.352 <<<<<< 0.160 <-< 3.00 < 0.0980 <4.48 << 0.0650 << 0.0890 < 0.0740 ---<< 0.0540 <------MW14 2/26/21 4.95 94.55 < 0.380 < 0.410 < 0.500 < 1.60 < 0.740 < 0.700 < 0.840 < 0.820 < 0.560 < 2.60 << 3.10 < 12.0 < 1.80 < 10.0 < 0.500 < 0.710 < 0.500 < 0.500 < 0.500 < 0.600 <-< 52.0 < 0.530 < 3.00 < 1.00 < 0.760 < 0.690 < 0.700 < 0.710 < 1.00 < 4.50 < 0.600 < 2.40 < 0.630 < 0.580 < 0.500 < 0.680 -----MW14 10/13/21 12.67 86.83 < 0.130 3.37 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 << 12.0 < 1.80 < 10.0 << 0.250 <<<< 0.600 < 0.320 -< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<< 0.520 < 0.280 -----MW14 12/20/21 13.09 86.41 < 0.130 < 0.410 < 0.500 < 1.60 0.305 < 0.200 < 0.820 < 0.560 <<<<< 12.0 << 10.0 <<<<<< 0.600 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 <<<< 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW14 3/15/22 8.25 91.25 < 0.130 < 0.410 < 0.500 < 1.60 0.327 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 < < 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW14 6/2/22 11.64 87.86 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<-<<<<<<<<<<<<<<<<<-----MW14 12/28/22 10.3 89.20 < 0.130 < 0.410 < 0.500 < 1.60 9.17 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW15 8/22/14 12.73 86.9 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<0.124 <<<0.105 <<0.172 <--<0.0980 <0.0850 <0.0940 <0.0600 <0.0650 <0.0920 <0.0890 <---<0.0890 <0.0540 <0.139 -<0.0150 <0.0150 <0.00500 <0.00627 <3.30MW153/17/15 6.05 93.58 ------<---<<-<---<---<----------------------MW15 4/25/16 8.2 91.43 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <---<<0.0540 <------MW15 3/17/17 8.28 91.35 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<-<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------MW15 abandoned 6/2017 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<-<<<<<<<<<<<<<<<<<-----MW16 8/22/14 11.62 87.02 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<0.124 <<<0.105 <<0.172 <--<0.0980 <0.0850 <0.0940 <0.0600 <0.0650 <0.0920 <0.0890 <---<0.0890 <0.0540 <0.139 -<0.0150 <0.0150 <0.00500 <0.00671 <3.30MW163/17/15 4.39 94.25 ------<---<<-<---<---<----------------------*MW16 4/25/16 6.64 92 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <---<<0.0540 <------MW16 3/17/17 7.08 91.56 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<--<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------MW16 5/16/18 8.59 90.05 < 0.119 < 0.0570 < 0.0920 < 0.122 < 0.169 < 0.0920 << 0.103 < 0.0870 < 0.280 <<-< 0.253 3.29 <<<<<< 0.160 <-< 3.00 < 0.0980 << 0.0940 << 0.0650 << 0.0890 < 0.0740 ---<< 0.0540 <------MW16 12/12/19 9.57 89.07 0.71 2.5 <0.0920 1.07 < 0.169 < 0.0920 << 0.103 < 0.0870 < 0.280 <<-< 0.253 <0.352 <<<<<< 0.160 <-< 3.00 < 0.0980 << 0.0940 << 0.0650 << 0.0890 < 0.0740 ---<< 0.0540 <------MW16 2/26/21 3.36 95.28 < 0.380 < 0.410 < 0.500 < 1.60 < 0.740 < 0.700 < 0.840 < 0.820 < 0.560 < 2.60 << 3.10 < 12.0 < 1.80 < 10.0 < 0.500 < 0.710 < 0.500 < 0.500 < 0.500 < 0.600 <-< 52.0 < 0.530 < 3.00 < 1.00 < 0.760 < 0.690 < 0.700 < 0.710 < 1.00 < 4.50 < 0.600 < 2.40 < 0.630 < 0.580 < 0.500 < 0.680 -----MW16 10/13/21 11.98 86.66 < 0.130 7.34 < 0.500 1.77 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 << 12.0 < 1.80 < 10.0 << 0.250 <<<< 0.600 < 0.320 -< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<0.708 < 0.280 -----MW16 12/20/21 11.99 86.65 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 <<<<< 12.0 << 10.0 <<<<<< 0.600 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 <<<< 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW16 3/15/22 7.26 91.38 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW16 6/2/22 10.89 87.75 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<-<<<<<<<<<<<<<<<<<-----MW16 12/28/22 9.12 89.52 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<<105 <<<<<<<<<<<<<<<<-----Notes:-1. All results in µg/L -2. Bold denotes a compound detection -3. Shading denotes a 2L Standard violation -4. Italics indicates a GCL violation -5. < - denotes less than sample detection limit -6. * It is believed that the 4/25/16 MW12 and MW16 samples were switched at some point following sampling and generation of the lab report. Monitoring well MW12 was resampled on 5/26/16 to confirm the anomalous data. Odors noted from the purged water from MW12 confirmed that well is contaminated as it has been his -7. ** The 2L Standards listed for the C9-C10 Aromatic carbon fraction class are actually for the C9-C22 Aromatic caron fraction class. - Page 3 of 3 6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B+oxygenates6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B+oxygenates6200B+oxygenates6200B+oxygenates6200B6200B6200B6200B6200B+oxygenatesMADEPVPHMADEPVPHMADEPVPH504.16010BWell ID Date Collected Depth to Groundwater (feet) Groundwater Elevation (feet)2-HexanoneEthyl tert-butyl etherBromoformC9-C12 AliphaticsCarbon Tetrachloridesec-ButylbenzeneC9-C10 AromaticsTrichloroethylenetert-ButylbenzeneChlorobenzenen-ButylbenzeneLeadEDBn-Propylbenzene3,3-Dimethyl-1-butanolStyrenetert-Amyl alcoholChloroformtert-Amyl methyl Ethertert-Butyl formate4-Methyl-2-pentanone (MIBK)Analytical Method TolueneEthylbenzeneEthanol2-ChlorotolueneBenzeneChlorodibromomethane1,3,5-Trimethylbenzene1,2,3-TrichloropropaneChloromethaneTetrachloroethene (PCE)DibromochloromethaneIsopropylbenzeneContaminant of Concern AcetoneNaphthalene1,2,4-Trimethylbenzene4-IsopropyltolueneMethylene ChlorideBromodichloromethane HISTORICAL SUMMARY OF GROUNDWATER SAMPLING RESULTS Incident Name: Poco Shop #1 Incident No. 29796 MTBETotal XylenesC5-C8 AliphaticsIPETrichlorofluoromethane2-Butanone (MEK)MW17 3/17/15 3.94 93.76 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 0.63 <<-<<0.352 <<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <0.0740 ---<0.0890 <0.0540 <-<0.0150 <0.00500 <0.0150 <0.00587 <0.00330MW174/25/16 6.29 91.41 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <---<<0.0540 <------MW17 3/17/17 6.34 91.36 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<--<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------MW17 12/12/19 8.71 88.99 <0.119 1.51 <0.0920 0.65 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<--<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------MW17 2/26/21 3.5 94.2 < 0.380 < 0.410 < 0.500 < 1.60 < 0.740 < 0.700 < 0.840 < 0.820 < 0.560 < 2.60 << 3.10 < 12.0 < 1.80 < 10.0 < 0.500 < 0.710 < 0.500 < 0.500 < 0.500 < 0.600 <-< 52.0 < 0.530 < 3.00 < 1.00 < 0.760 < 0.690 < 0.700 < 0.710 < 1.00 < 4.50 < 0.600 < 2.40 < 0.630 < 0.580 < 0.500 < 0.680 -----MW17 10/13/21 14.11 83.59 < 0.130 6.22 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 << 12.0 < 1.80 < 10.0 << 0.250 <<<< 0.600 < 0.320 -< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<0.648 < 0.280 -----MW17 12/20/21 11.11 86.59 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 <<<<< 12.0 << 10.0 <<<<<< 0.600 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 <<<< 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW17 3/15/22 6.4 91.3 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW17 6/2/22 10.02 87.68 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<-<<<<<<<<<<<<<<<<<-----MW17 12/28/22 8.15 89.55 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW18 3/17/15 3.24 93.62 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <0.378 <<-<<0.352 <<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <0.0740 ---<0.0890 <0.0540 <-<0.0150 <0.00500 <0.0150 <0.000590 <0.00330MW184/25/16 5.57 91.29 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <---<<0.0540 <------MW18 3/17/17 5.64 91.22 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<--<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------MW18 12/12/19 8 88.86 <0.119 1.11 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<--<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------MW18 2/26/21 2.65 94.21 < 0.380 < 0.410 < 0.500 < 1.60 < 0.740 < 0.700 < 0.840 < 0.820 < 0.560 < 2.60 << 3.10 < 12.0 < 1.80 < 10.0 < 0.500 < 0.710 < 0.500 < 0.500 < 0.500 < 0.600 <-< 52.0 < 0.530 < 3.00 < 1.00 < 0.760 < 0.690 < 0.700 < 0.710 < 1.00 < 4.50 < 0.600 < 2.40 < 0.630 < 0.580 < 0.500 < 0.680 -----MW18 10/13/21 10.41 86.45 < 0.130 9.29 < 0.500 2.17 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 << 12.0 < 1.80 < 10.0 << 0.250 <<<< 0.600 < 0.320 -< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<1.09 < 0.280 -----MW18 12/20/21 10.45 86.41 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 <<<<< 12.0 << 10.0 <<<<<< 0.600 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 <<<< 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW18 3/15/22 5.69 91.17 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW18 6/2/22 9.41 87.45 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<-<<<<<<<<<<<<<<<<<-----MW18 12/28/22 7.35 89.51 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW19 3/17/15 2.71 92.96 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <0.378 <<-<0.77 <<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <0.0740 ---<0.0890 <0.0540 <-<0.0150 <0.00500 <0.0150 <0.00586 0.004MW194/25/16 5.05 90.62 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <---<<0.0540 <------MW19 3/17/17 5.04 90.63 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<0.52 <<<<<<<--<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------MW19 5/16/18 6.7 88.97 < 0.119 < 0.0570 < 0.0920 < 0.122 < 0.169 < 0.0920 << 0.103 < 0.0870 < 0.280 <<-< 0.253 3.32 <<<<<< 0.160 <-< 3.00 < 0.0980 << 0.0940 << 0.0650 << 0.0890 < 0.0740 ---<< 0.0540 <------MW19 12/12/19 7.34 88.33 < 0.119 0.88 < 0.0920 < 0.122 < 0.169 < 0.0920 << 0.103 < 0.0870 < 0.280 <<-< 0.253 <0.352 <<<<<< 0.160 <-< 3.00 < 0.0980 << 0.0940 << 0.0650 << 0.0890 < 0.0740 ---<< 0.0540 <------MW19 2/26/21 2.25 93.42 < 0.380 < 0.410 < 0.500 < 1.60 < 0.740 < 0.700 < 0.840 < 0.820 < 0.560 < 2.60 << 3.10 < 12.0 < 1.80 < 10.0 < 0.500 < 0.710 < 0.500 < 0.500 < 0.500 < 0.600 <-< 52.0 < 0.530 < 3.00 < 1.00 < 0.760 < 0.690 < 0.700 < 0.710 < 1.00 < 4.50 < 0.600 < 2.40 < 0.630 < 0.580 < 0.500 < 0.680 -----MW19 10/13/21 9.73 85.94 < 0.130 6.53 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 << 12.0 < 1.80 < 10.0 << 0.250 <<<< 0.600 < 0.320 -< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<0.741 < 0.280 -----MW19 12/20/21 9.78 85.89 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 <<<<< 12.0 << 10.0 <<<<<< 0.600 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 <<<< 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW19 3/15/22 5.09 90.58 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW19 6/2/22 8.86 86.81 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<-<<<<<<<<<<<<<<<<<-----MW19 12/28/22 6.21 89.46 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW20 3/17/15 3.45 93.04 1.61 <0.0570 0.15 0.432 6.29 <0.0920 <0.77 <0.0870 <0.378 <<-<<0.352 <<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <0.0740 ---<0.0890 <0.0540 <-<0.0150 <0.00500 <0.0150 <0.00588 <0.00330MW204/25/16 5.78 90.71 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<<<<<<0.172 <--<0.0980 <0.190 0.69 <<0.0650 <0.0920 <0.0890 <---<<0.0540 <------MW20 3/17/17 5.78 90.71 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<--<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------MW20 10/3/17 10.35 86.14 899 30.3 73.6 258 408 10.3 <69.9 9.53 <<<-<0.77 <<<<<<0.172 <-<3.00 6.57 <45 <4.56 <1.24 1.44 ---<<<------MW20 5/16/18 7.47 89.02 < 0.119 < 0.0570 < 0.0920 < 0.122 < 0.169 < 0.0920 << 0.103 < 0.0870 < 0.280 <<-< 0.253 < 0.352 <<<<<< 0.160 <-< 3.00 < 0.0980 << 0.0940 << 0.0650 << 0.0890 < 0.0740 ---<< 0.0540 <------MW20 12/12/19 7.8 88.69 < 0.119 0.71 < 0.0920 < 0.122 < 0.169 < 0.0920 << 0.103 < 0.0870 < 0.280 <<-< 0.253 < 0.352 <<<<<< 0.160 <-< 3.00 < 0.0980 << 0.0940 << 0.0650 << 0.0890 < 0.0740 ---<< 0.0540 <------MW20 2/26/21 1.75 94.74 < 0.380 < 0.410 < 0.500 < 1.60 < 0.740 < 0.700 < 0.840 < 0.820 < 0.560 < 2.60 << 3.10 < 12.0 < 1.80 < 10.0 < 0.500 < 0.710 < 0.500 < 0.500 < 0.500 < 0.600 <-< 52.0 < 0.530 < 3.00 < 1.00 < 0.760 < 0.690 < 0.700 < 0.710 < 1.00 < 4.50 < 0.600 < 2.40 < 0.630 < 0.580 < 0.500 < 0.680 -----MW20 10/13/21 10.6 85.89 < 0.130 6.18 < 0.500 1.86 < 0.220 < 0.200 <0.907 < 0.560 < 2.60 < 0.570 << 12.0 < 1.80 < 10.0 << 0.250 <<<< 0.600 < 0.320 -< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<< 0.520 < 0.280 -----MW20 12/20/21 10.8 85.69 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 <<<<< 12.0 << 10.0 <<<<<< 0.600 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 <<<< 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW20 3/15/22 5.45 91.04 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW20 6/2/22 9.68 86.81 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<-<<<<<<<<<<<<<<<<<-----MW20 12/28/22 7.72 88.77 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW21 10/13/21 10.91 76.67 < 0.130 7.89 < 0.500 1.86 < 0.220 < 0.200 <0.944 < 0.560 < 2.60 < 0.570 << 12.0 < 1.80 < 10.0 << 0.250 <<<< 0.600 < 0.320 -< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<0.667 < 0.280 -----MW21 12/20/21 11.33 76.25 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 <<<<< 12.0 << 10.0 <<<<<< 0.600 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 <<<< 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW21 3/15/22 6.59 80.99 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW21 6/2/22 10.14 77.44 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<-<<<<<<<<<<<<<<<<<-----MW21 12/28/22 8.31 79.27 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW22 10/13/21 7.78 88.96 < 0.130 7.02 < 0.500 1.62 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 << 12.0 < 1.80 < 10.0 << 0.250 <<<< 0.600 < 0.320 -< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<0.58 < 0.280 -----MW22 12/20/21 10.58 86.16 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 <<<<< 12.0 << 10.0 <<<<<< 0.600 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 <<<< 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW22 3/15/22 5.49 91.25 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW22 6/2/22 7.63 89.11 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<-<<<<<<<<<<<<<<<<<-----MW22 12/28/22 7.79 88.95 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MWB 6/27/18 8.85 90.24 9,530 33,200 3,110 17,550 550 < 46.0 <3,680 935 < 140 <<<< 127 < 176 <<<<<< 80.0 <-< 1500 < 49.0 << 47.0 <380 << 44.5 645 <<<<< 27.0 <<-----MWB 12/12/19 10.12 88.97 3,300 4,830 1,290 6,230 452 37 <2,140 758 <<15.2 <18.7 <<<<<<<<-<93.2 <802 <236 14.8 9.64 7.64 4,250 251 <0.53 <<<-----MWB 2/26/21 3.9 95.19 2,030 2,230 2,050 1,770 208 < 14.0 < 16.8 2,020 413 < 52.0 << 62.0 < 240 < 36.0 < 200 < 10.0 < 14.2 < 10.0 < 10.0 < 10.0 < 12.0 <-< 1040 145 < 60.0 1,330 46.4 421 16.3 < 14.2 < 20.0 580 69.1 < 48.0 < 12.6 < 11.6 < 10.0 < 13.6 -----MWB 12/20/21 12.84 86.25 269 158 12.5 15.1 118 4.82 7.67 < 1.12 <<<<< 24.0 << 20.0 <<<<<< 1.20 <-< 48.0 < 1.06 <11.3 < 1.52 1.7 <<<4,310 35.3 < 4.80 <<<<< 0.560 -----MWB 3/15/22 5.54 93.55 1.09 3.24 0.584 3.58 44.7 < 0.200 <1.01 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 <3.19 < 0.760 < 0.690 < 0.700 < 0.710 <3,040 3.2 < 2.40 <<<<< 0.280 -----MWB 6/2/22 10.85 88.24 303 3,060 240 3,830 87.1 < 4.00 <549 176 <<67.7 <<214 <<<<<<<-<10.8 <278 <17.1 <<<1,970 40.6 <<<<<<-----MWB 12/28/22 9.95 89.14 0.216 < 0.410 0.701 < 1.60 15.7 < 0.200 <1.2 < 0.560 <<<<<<<<<<<<<<24.6 <<<<<<<<<<<<<<<<-----MWC 12/12/19 10.2 89.01 1,260 11,900 2,300 10,280 <33.8 43.5 <2,090 536 <<<<<<<<<<<<<-<52.2 <<<214 4.88 3.74 28.2 <<<<<<<-----MWC 2/26/21 4.32 94.89 13,800 22,900 1,460 6,370 3,870 < 140 < 168 646 159 < 520 << 620 < 2400 < 360 < 2000 < 100 < 142 < 100 < 100 < 100 < 120 <-< 10400 < 106 < 600 342 < 152 < 138 < 140 < 142 < 200 5,260 311 < 480 < 126 < 116 < 100 < 136 -----MWC 10/13/21 20.02 79.79 93.4 187 20.4 191 794 1.54 <13.7 7.81 80.9 < 2.85 << 60.0 < 9.00 94.3 << 1.25 <<<< 3.00 < 1.60 -< 120 < 2.65 <26.2 < 3.80 < 3.45 < 3.50 < 3.55 <2,060 28.8 < 12.0 <<<< 2.60 < 1.40 -----MWC 12/20/21 16.5 82.71 76.9 107 5.55 33.3 704 1.4 < 4.10 < 2.80 <<<<< 60.0 << 50.0 <<<<<< 3.00 <-< 120 < 2.65 << 5.00 < 3.80 < 3.45 <<<1,850 22 < 12.0 <<<<< 1.40 -----MWC 3/15/22 13.9 85.31 0.933 2.02 < 0.500 < 1.60 98.3 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 <1,290 2.18 < 2.40 <<<<< 0.280 -----MWC 6/2/22 11.3 87.91 0.276 0.593 < 0.500 < 1.60 527 1.2 <<<5.46 <<<<<<<<<<<<-<<<<<<<<<196 9.62 <<<<<<-----MWC 12/28/22 13.96 85.25 < 0.130 < 0.410 < 0.510 < 1.60 40.8 < 0.200 < < 0.820 < 0.560 <<<<<<<<<<<<<<37.7 <<<<<<<<<<<<<<<<-----PW3 4/25/16 --<0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <---<<0.0540 <------PW3 10/19/16 --<0.119 0.17 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <0.378 <<-<<0.352 <0.124 <0.0159 <<0.105 <0.177 <0.172 <--<0.0980 <0.190 1.71 <0.06 <0.0650 <0.0920 <0.0890 <0.074 ---<0.089 <0.0540 <0.139 ------PW3 3/17/17 --<0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<--<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------Well #1 8/26/13 --<0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.620 0.55 <<0.620 1.21 <--<<<<<<<<---<<<------WELL #1 4/25/16 --<0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <---<<0.0540 <------Town Well 10/19/16 --<0.119 0.17 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <0.378 <<-<<0.352 <0.124 <0.0159 <<0.105 <0.177 <0.172 <--<0.0980 <0.190 <0.0940 <0.06 <0.0650 <0.0920 <0.0890 <0.074 ---<0.089 <0.0540 <0.139 ------Well# 1 3/17/17 --<0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<--<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------WELL#1 2/26/21 --< 0.380 < 0.410 < 0.500 < 1.60 < 0.740 < 0.700 < 0.840 < 0.820 < 0.560 < 2.60 << 3.10 < 12.0 < 1.80 < 10.0 1.9 1.58 < 0.500 < 0.500 2.87 0.926 <-< 52.0 < 0.530 < 3.00 < 1.00 < 0.760 < 0.690 < 0.700 < 0.710 < 1.00 < 4.50 < 0.600 < 2.40 < 0.630 < 0.580 < 0.500 < 0.680 -----WELL #1 12/20/21 --< 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 <<<<< 12.0 << 10.0 <<<<<< 0.600 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 <<<< 4.50 < 0.230 < 2.40 <<<<< 0.280 -----WSW1 3/15/22 --< 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 0.999 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<<< 0.280 -----WELL #1 6/2/22 0.324 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<0.953 <<<<<0.611 57.9 <<<<<<<<<<<<<<<<-----1 600 600 500 20 70 no std 400 400 4,000 100 40 no std 100 6,000 0.6 4 no std 50 0.4 70 3 0.4 4,000 70 5 6 70 70 70 25 70 40 128 40 70 0.7 3 2,000 47 400 700 200**0.02 155,000 260,000 84,500 85,500 20,000 70,000 no std 28,500 25,000 4,000,000 no std 40,000 no std 100,000 6,000,000 no std 4,000 no std 50,000 400 70,000 3,000 400 4,000,000 25,000 5,000 6,000 6,900 30,000 8,500 11,700 70,000 40,000 128,000 40,000 15,000 700 3,000 2,000,000 47,000 no std no std no std 50 15,000Notes:1. All results in µg/L2. Bold denotes a compound detection 3. Shading denotes a 2L Standard violation4. Italics indicates a GCL violation5. < - denotes less than sample detection limit6. * It is believed that the 4/25/16 MW12 and MW16 samples were switched at some point following sampling and generation of the lab report. Monitoring well MW12 was resampled on 5/26/16 to confirm the anomalous data. Odors noted from the purged water from MW12 confirmed that well is contaminated as it has been historically. The results are listed correctly here. 7. ** The 2L Standards listed for the C9-C10 Aromatic carbon fraction class are actually for the C9-C22 Aromatic caron fraction class. GCL2L Standard APPENDIX D ANALYTICAL REPORT PREPARED FOR Attn: Ryan Kerins Terraquest Environmental Consultants, PC 100 E. Ruffin Street Mebane, North Carolina 27302 Generated 2/14/2023 5:25:40 PM JOB DESCRIPTION Poco #1 JOB NUMBER 400-232924-1 See page two for job notes and contact information. Pensacola FL 32514 3355 McLemore Drive Eurofins Pensacola Page 1 of 16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Eurofins Pensacola Eurofins Pensacola is a laboratory within Eurofins Environment Testing Southeast, LLC, a company within Eurofins Environment Testing Group of Companies Job Notes The test results in this report meet all NELAP requirements for accredited parameters, unless otherwise noted, and relate only to the referenced samples. Pursuant to NELAP, this report may not be reproduced, except in full, without written approval from the laboratory. For questions please contact the Project Manager at the e-mail address listed on this page, or the telephone number at the bottom of the page. Eurofins Environment Testing Southeast LLC, Pensacola Certifications and Approvals: Alabama (40150), Arizona (AZ0710), Arkansas (88-0689), Florida (E81010), Illinois (200041), Iowa (367), Kansas (E-10253), Kentucky UST (53), Louisiana (30748), Maryland (233), Massachusetts (M-FL094), Michigan (9912), New Hampshire (250510), New Jersey (FL006), North Carolina (314), Oklahoma (9810), Pennsylvania (68-00467), Rhode Island (LAO00307), South Carolina (96026), Tennessee (TN02907), Texas (T104704286-10-2), Virginia (00008), Washington (C2043), West Virginia (136), USDA Foreign Soil Permit (P330-08-00006). The test results in this report relate only to the samples as received by the laboratory and will meet all requirements of the methodology, with any exceptions noted. This report shall not be reproduced except in full, without the express written approval of the laboratory. All questions should be directed to the Eurofins Environment Testing Southeast, LLC Project Manager. Authorization Generated 2/14/2023 5:25:40 PM Authorized for release by Chad Bechtold, Project Manager Chad.Bechtold@et.eurofinsus.com (813)690-3563 Page 2 of 16 2/14/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Table of Contents Client: Terraquest Environmental Consultants, PC Project/Site: Poco #1 Laboratory Job ID: 400-232924-1 Page 3 of 16 Eurofins Pensacola2/14/2023 Cover Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Case Narrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Detection Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Sample Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Client Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 Surrogate Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 QC Association . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 QC Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 Chronicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 Method Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 Certification Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 Chain of Custody . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 Receipt Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Case Narrative Client: Terraquest Environmental Consultants, PC Job ID: 400-232924-1 Project/Site: Poco #1 Job ID: 400-232924-1 Laboratory: Eurofins Pensacola Narrative Job Narrative 400-232924-1 Receipt The sample was received on 2/9/2023 9:51 AM. Unless otherwise noted below, the sample arrived in good condition. The temperature of the cooler at receipt time was 19.1°C. Thermal preservation is not performed for air samples. Air - GC VOA No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page. Eurofins PensacolaPage 4 of 16 2/14/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Detection Summary Job ID: 400-232924-1Client: Terraquest Environmental Consultants, PC Project/Site: Poco #1 Client Sample ID: SVE Stack Lab Sample ID: 400-232924-1 No Detections. Eurofins Pensacola This Detection Summary does not include radiochemical test results. Page 5 of 16 2/14/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Sample Summary Client: Terraquest Environmental Consultants, PC Job ID: 400-232924-1 Project/Site: Poco #1 Lab Sample ID Client Sample ID Matrix Collected Received 400-232924-1 SVE Stack Air - Tedlar Bag 02/08/23 13:20 02/09/23 09:51 Eurofins PensacolaPage 6 of 16 2/14/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Client Sample Results Job ID: 400-232924-1Client: Terraquest Environmental Consultants, PC Project/Site: Poco #1 Lab Sample ID: 400-232924-1Client Sample ID: SVE Stack Matrix: Air - Tedlar BagDate Collected: 02/08/23 13:20 Date Received: 02/09/23 09:51 Method: EPA-18 - Volatile Organic Compounds RL MDL 125 U 313 125 ppb v/v 02/09/23 18:07 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Benzene 1330 260 ppb v/v 02/09/23 18:07 1260UToluene 230 124 ppb v/v 02/09/23 18:07 1124UEthylbenzene 1150 230 ppb v/v 02/09/23 18:07 1230Um-Xylene & p-Xylene 1150 159 ppb v/v 02/09/23 18:07 1159Uo-Xylene 1150 368 ppb v/v 02/09/23 18:07 1368UXylenes, Total 1390 499 ppb v/v 02/09/23 18:07 1499UMethyl tert-butyl ether 24500 12200 ppb v/v 02/09/23 18:07 112200UGasoline Range Organics (GRO)-C6-C10 a,a,a-Trifluorotoluene (fid)104 67-139 02/09/23 18:07 1 Surrogate Dil FacAnalyzedPreparedQualifierLimits%Recovery a,a,a-Trifluorotoluene (pid)100 02/09/23 18:07 176-127 Eurofins Pensacola Page 7 of 16 2/14/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Definitions/Glossary Job ID: 400-232924-1Client: Terraquest Environmental Consultants, PC Project/Site: Poco #1 Qualifiers Air - GC VOA Qualifier Description U Indicates the analyte was analyzed for but not detected. Qualifier Glossary These commonly used abbreviations may or may not be present in this report. ¤Listed under the "D" column to designate that the result is reported on a dry weight basis Abbreviation %R Percent Recovery CFL Contains Free Liquid CFU Colony Forming Unit CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) Dil Fac Dilution Factor DL Detection Limit (DoD/DOE) DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample DLC Decision Level Concentration (Radiochemistry) EDL Estimated Detection Limit (Dioxin) LOD Limit of Detection (DoD/DOE) LOQ Limit of Quantitation (DoD/DOE) MCL EPA recommended "Maximum Contaminant Level" MDA Minimum Detectable Activity (Radiochemistry) MDC Minimum Detectable Concentration (Radiochemistry) MDL Method Detection Limit ML Minimum Level (Dioxin) MPN Most Probable Number MQL Method Quantitation Limit NC Not Calculated ND Not Detected at the reporting limit (or MDL or EDL if shown) NEG Negative / Absent POS Positive / Present PQL Practical Quantitation Limit PRES Presumptive QC Quality Control RER Relative Error Ratio (Radiochemistry) RL Reporting Limit or Requested Limit (Radiochemistry) RPD Relative Percent Difference, a measure of the relative difference between two points TEF Toxicity Equivalent Factor (Dioxin) TEQ Toxicity Equivalent Quotient (Dioxin) TNTC Too Numerous To Count Eurofins Pensacola Page 8 of 16 2/14/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Surrogate Summary Job ID: 400-232924-1Client: Terraquest Environmental Consultants, PC Project/Site: Poco #1 Method: EPA-18 - Volatile Organic Compounds Prep Type: Total/NAMatrix: Air - Tedlar Bag Lab Sample ID Client Sample ID (67-139)(76-127) TFT-F TFT-P 104 100400-232924-1 Percent Surrogate Recovery (Acceptance Limits) SVE Stack 101 96LCS 400-611750/1011 Lab Control Sample 102 96MB 400-611750/2 Method Blank Surrogate Legend TFT-F = a,a,a-Trifluorotoluene (fid) TFT-P = a,a,a-Trifluorotoluene (pid) Eurofins Pensacola Page 9 of 16 2/14/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 QC Association Summary Job ID: 400-232924-1Client: Terraquest Environmental Consultants, PC Project/Site: Poco #1 Air - GC VOA Analysis Batch: 611750 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch Air - Tedlar Bag EPA-18400-232924-1 SVE Stack Total/NA Air - Tedlar Bag EPA-18MB 400-611750/2 Method Blank Total/NA Air - Tedlar Bag EPA-18LCS 400-611750/1011 Lab Control Sample Total/NA Eurofins Pensacola Page 10 of 16 2/14/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 QC Sample Results Job ID: 400-232924-1Client: Terraquest Environmental Consultants, PC Project/Site: Poco #1 Method: EPA-18 - Volatile Organic Compounds Client Sample ID: Method BlankLab Sample ID: MB 400-611750/2 Matrix: Air - Tedlar Bag Prep Type: Total/NA Analysis Batch: 611750 RL MDL Benzene 125 U 313 125 ppb v/v 02/09/23 16:55 1 MB MB Analyte Dil FacAnalyzedPreparedDUnitResultQualifier 260 U 2601330 ppb v/v 02/09/23 16:55 1Toluene 124 U 124230 ppb v/v 02/09/23 16:55 1Ethylbenzene 230 U 2301150 ppb v/v 02/09/23 16:55 1m-Xylene & p-Xylene 159 U 1591150 ppb v/v 02/09/23 16:55 1o-Xylene 368 U 3681150 ppb v/v 02/09/23 16:55 1Xylenes, Total 499 U 4991390 ppb v/v 02/09/23 16:55 1Methyl tert-butyl ether 12200 U 1220024500 ppb v/v 02/09/23 16:55 1Gasoline Range Organics (GRO)-C6-C10 a,a,a-Trifluorotoluene (fid)102 67-139 02/09/23 16:55 1 MB MB Surrogate Dil FacPreparedAnalyzedQualifierLimits%Recovery 96 02/09/23 16:55 1a,a,a-Trifluorotoluene (pid)76-127 Client Sample ID: Lab Control SampleLab Sample ID: LCS 400-611750/1011 Matrix: Air - Tedlar Bag Prep Type: Total/NA Analysis Batch: 611750 Benzene 15700 16390 ppb v/v 105 85 -115 Analyte LCS LCS DUnitResultQualifier %Rec Spike Added %Rec Limits Toluene 13300 14240 ppb v/v 107 85 -115 Ethylbenzene 11500 12530 ppb v/v 109 85 -115 m-Xylene & p-Xylene 23000 25550 ppb v/v 111 85 -115 o-Xylene 11500 12050 ppb v/v 105 85 -115 Xylenes, Total 34500 37600 ppb v/v 109 85 -115 Methyl tert-butyl ether 27700 29890 ppb v/v 108 85 -115 Gasoline Range Organics (GRO)-C6-C10 196000 198900 ppb v/v 102 85 -115 a,a,a-Trifluorotoluene (fid)67 -139 Surrogate 101 LCS LCS Qualifier Limits%Recovery 96a,a,a-Trifluorotoluene (pid)76 -127 Eurofins Pensacola Page 11 of 16 2/14/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Lab Chronicle Client: Terraquest Environmental Consultants, PC Job ID: 400-232924-1 Project/Site: Poco #1 Client Sample ID: SVE Stack Lab Sample ID: 400-232924-1 Matrix: Air - Tedlar BagDate Collected: 02/08/23 13:20 Date Received: 02/09/23 09:51 Analysis EPA-18 SAB02/09/23 18:071 EET PEN611750 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 5 mL 5 mL Client Sample ID: Method Blank Lab Sample ID: MB 400-611750/2 Matrix: Air - Tedlar BagDate Collected: N/A Date Received: N/A Analysis EPA-18 SAB02/09/23 16:551 EET PEN611750 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 5 mL 5 mL Client Sample ID: Lab Control Sample Lab Sample ID: LCS 400-611750/1011 Matrix: Air - Tedlar BagDate Collected: N/A Date Received: N/A Analysis EPA-18 SAB02/09/23 16:151 EET PEN611750 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 5 mL 5 mL Laboratory References: EET PEN = Eurofins Pensacola, 3355 McLemore Drive, Pensacola, FL 32514, TEL (850)474-1001 Eurofins Pensacola Page 12 of 16 2/14/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Method Summary Job ID: 400-232924-1Client: Terraquest Environmental Consultants, PC Project/Site: Poco #1 Method Method Description LaboratoryProtocol EPAEPA-18 Volatile Organic Compounds EET PEN Protocol References: EPA = US Environmental Protection Agency Laboratory References: EET PEN = Eurofins Pensacola, 3355 McLemore Drive, Pensacola, FL 32514, TEL (850)474-1001 Eurofins Pensacola Page 13 of 16 2/14/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Accreditation/Certification Summary Client: Terraquest Environmental Consultants, PC Job ID: 400-232924-1 Project/Site: Poco #1 Laboratory: Eurofins Pensacola Unless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below. Authority Program Identification Number Expiration Date North Carolina (WW/SW)State 314 12-31-23 The following analytes are included in this report, but the laboratory is not certified by the governing authority. This list may include analytes for which the agency does not offer certification. Analysis Method Prep Method Matrix Analyte EPA-18 Air - Tedlar Bag Benzene EPA-18 Air - Tedlar Bag Ethylbenzene EPA-18 Air - Tedlar Bag Gasoline Range Organics (GRO)-C6-C10 EPA-18 Air - Tedlar Bag Methyl tert-butyl ether EPA-18 Air - Tedlar Bag m-Xylene & p-Xylene EPA-18 Air - Tedlar Bag o-Xylene EPA-18 Air - Tedlar Bag Toluene EPA-18 Air - Tedlar Bag Xylenes, Total Eurofins Pensacola Page 14 of 16 2/14/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Page 15 of 16 2/14/2023 1234567 8 9 10 11 12 13 14 15 Login Sample Receipt Checklist Client: Terraquest Environmental Consultants, PC Job Number: 400-232924-1 Login Number: 232924 Question Answer Comment Creator: Whitley, Adrian List Source: Eurofins Pensacola List Number: 1 N/ARadioactivity wasn't checked or is </= background as measured by a survey meter. N/AThe cooler's custody seal, if present, is intact. N/ASample custody seals, if present, are intact. TrueThe cooler or samples do not appear to have been compromised or tampered with. N/ASamples were received on ice.Thermal preservation not required. TrueCooler Temperature is acceptable. TrueCooler Temperature is recorded.19.1°C IR8 TrueCOC is present. TrueCOC is filled out in ink and legible. TrueCOC is filled out with all pertinent information. TrueIs the Field Sampler's name present on COC? TrueThere are no discrepancies between the containers received and the COC. TrueSamples are received within Holding Time (excluding tests with immediate HTs) TrueSample containers have legible labels. TrueContainers are not broken or leaking. TrueSample collection date/times are provided. TrueAppropriate sample containers are used. TrueSample bottles are completely filled. N/ASample Preservation Verified. TrueThere is sufficient vol. for all requested analyses, incl. any requested MS/MSDs N/AContainers requiring zero headspace have no headspace or bubble is <6mm (1/4"). TrueMultiphasic samples are not present. TrueSamples do not require splitting or compositing. N/AResidual Chlorine Checked. Eurofins Pensacola Page 16 of 16 2/14/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ANALYTICAL REPORT PREPARED FOR Attn: Ryan Kerins Terraquest Environmental Consultants, PC 100 E. Ruffin Street Mebane, North Carolina 27302 Generated 3/13/2023 4:11:11 PM JOB DESCRIPTION Poco #1 JOB NUMBER 400-233963-1 See page two for job notes and contact information. Pensacola FL 32514 3355 McLemore Drive Eurofins Pensacola Page 1 of 16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Eurofins Pensacola Eurofins Pensacola is a laboratory within Eurofins Environment Testing Southeast, LLC, a company within Eurofins Environment Testing Group of Companies Job Notes The test results in this report meet all NELAP requirements for accredited parameters, unless otherwise noted, and relate only to the referenced samples. Pursuant to NELAP, this report may not be reproduced, except in full, without written approval from the laboratory. For questions please contact the Project Manager at the e-mail address listed on this page, or the telephone number at the bottom of the page. Eurofins Environment Testing Southeast LLC, Pensacola Certifications and Approvals: Alabama (40150), Arizona (AZ0710), Arkansas (88-0689), Florida (E81010), Illinois (200041), Iowa (367), Kansas (E-10253), Kentucky UST (53), Louisiana (30748), Maryland (233), Massachusetts (M-FL094), Michigan (9912), New Hampshire (250510), New Jersey (FL006), North Carolina (314), Oklahoma (9810), Pennsylvania (68-00467), Rhode Island (LAO00307), South Carolina (96026), Tennessee (TN02907), Texas (T104704286-10-2), Virginia (00008), Washington (C2043), West Virginia (136), USDA Foreign Soil Permit (P330-08-00006). The test results in this report relate only to the samples as received by the laboratory and will meet all requirements of the methodology, with any exceptions noted. This report shall not be reproduced except in full, without the express written approval of the laboratory. All questions should be directed to the Eurofins Environment Testing Southeast, LLC Project Manager. Authorization Generated 3/13/2023 4:11:11 PM Authorized for release by Chad Bechtold, Project Manager Chad.Bechtold@et.eurofinsus.com (813)690-3563 Page 2 of 16 3/13/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Table of Contents Client: Terraquest Environmental Consultants, PC Project/Site: Poco #1 Laboratory Job ID: 400-233963-1 Page 3 of 16 Eurofins Pensacola3/13/2023 Cover Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Case Narrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Detection Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Sample Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Client Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 Surrogate Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 QC Association . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 QC Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 Chronicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 Method Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 Certification Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 Chain of Custody . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 Receipt Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Case Narrative Client: Terraquest Environmental Consultants, PC Job ID: 400-233963-1 Project/Site: Poco #1 Job ID: 400-233963-1 Laboratory: Eurofins Pensacola Narrative Job Narrative 400-233963-1 Receipt The sample was received on 3/3/2023 9:28 AM. Unless otherwise noted below, the sample arrived in good condition. The temperature of the cooler at receipt time was 24.8°C. Thermal preservation is not performed for air samples. Air - GC VOA No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page. Eurofins PensacolaPage 4 of 16 3/13/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Detection Summary Job ID: 400-233963-1Client: Terraquest Environmental Consultants, PC Project/Site: Poco #1 Client Sample ID: SVE STACK Lab Sample ID: 400-233963-1 No Detections. Eurofins Pensacola This Detection Summary does not include radiochemical test results. Page 5 of 16 3/13/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Sample Summary Client: Terraquest Environmental Consultants, PC Job ID: 400-233963-1 Project/Site: Poco #1 Lab Sample ID Client Sample ID Matrix Collected Received 400-233963-1 SVE STACK Air - Tedlar Bag 03/02/23 11:10 03/03/23 09:28 Eurofins PensacolaPage 6 of 16 3/13/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Client Sample Results Job ID: 400-233963-1Client: Terraquest Environmental Consultants, PC Project/Site: Poco #1 Lab Sample ID: 400-233963-1Client Sample ID: SVE STACK Matrix: Air - Tedlar BagDate Collected: 03/02/23 11:10 Date Received: 03/03/23 09:28 Method: EPA-18 - Volatile Organic Compounds RL MDL 125 U 313 125 ppb v/v 03/03/23 20:29 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Benzene 1330 260 ppb v/v 03/03/23 20:29 1260UToluene 230 124 ppb v/v 03/03/23 20:29 1124UEthylbenzene 1150 230 ppb v/v 03/03/23 20:29 1230Um-Xylene & p-Xylene 1150 159 ppb v/v 03/03/23 20:29 1159Uo-Xylene 1150 368 ppb v/v 03/03/23 20:29 1368UXylenes, Total 1390 499 ppb v/v 03/03/23 20:29 1499UMethyl tert-butyl ether 24500 12200 ppb v/v 03/03/23 20:29 112200UGasoline Range Organics (GRO)-C6-C10 a,a,a-Trifluorotoluene (fid)101 67-139 03/03/23 20:29 1 Surrogate Dil FacAnalyzedPreparedQualifierLimits%Recovery a,a,a-Trifluorotoluene (pid)99 03/03/23 20:29 176-127 Eurofins Pensacola Page 7 of 16 3/13/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Definitions/Glossary Job ID: 400-233963-1Client: Terraquest Environmental Consultants, PC Project/Site: Poco #1 Qualifiers Air - GC VOA Qualifier Description U Indicates the analyte was analyzed for but not detected. Qualifier Glossary These commonly used abbreviations may or may not be present in this report. ¤Listed under the "D" column to designate that the result is reported on a dry weight basis Abbreviation %R Percent Recovery CFL Contains Free Liquid CFU Colony Forming Unit CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) Dil Fac Dilution Factor DL Detection Limit (DoD/DOE) DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample DLC Decision Level Concentration (Radiochemistry) EDL Estimated Detection Limit (Dioxin) LOD Limit of Detection (DoD/DOE) LOQ Limit of Quantitation (DoD/DOE) MCL EPA recommended "Maximum Contaminant Level" MDA Minimum Detectable Activity (Radiochemistry) MDC Minimum Detectable Concentration (Radiochemistry) MDL Method Detection Limit ML Minimum Level (Dioxin) MPN Most Probable Number MQL Method Quantitation Limit NC Not Calculated ND Not Detected at the reporting limit (or MDL or EDL if shown) NEG Negative / Absent POS Positive / Present PQL Practical Quantitation Limit PRES Presumptive QC Quality Control RER Relative Error Ratio (Radiochemistry) RL Reporting Limit or Requested Limit (Radiochemistry) RPD Relative Percent Difference, a measure of the relative difference between two points TEF Toxicity Equivalent Factor (Dioxin) TEQ Toxicity Equivalent Quotient (Dioxin) TNTC Too Numerous To Count Eurofins Pensacola Page 8 of 16 3/13/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Surrogate Summary Job ID: 400-233963-1Client: Terraquest Environmental Consultants, PC Project/Site: Poco #1 Method: EPA-18 - Volatile Organic Compounds Prep Type: Total/NAMatrix: Air - Tedlar Bag Lab Sample ID Client Sample ID (67-139)(76-127) TFT-F TFT-P 101 99400-233963-1 Percent Surrogate Recovery (Acceptance Limits) SVE STACK 100 100LCS 400-614855/1001 Lab Control Sample 100 100MB 400-614855/2 Method Blank Surrogate Legend TFT-F = a,a,a-Trifluorotoluene (fid) TFT-P = a,a,a-Trifluorotoluene (pid) Eurofins Pensacola Page 9 of 16 3/13/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 QC Association Summary Job ID: 400-233963-1Client: Terraquest Environmental Consultants, PC Project/Site: Poco #1 Air - GC VOA Analysis Batch: 614855 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch Air - Tedlar Bag EPA-18400-233963-1 SVE STACK Total/NA Air - Tedlar Bag EPA-18MB 400-614855/2 Method Blank Total/NA Air - Tedlar Bag EPA-18LCS 400-614855/1001 Lab Control Sample Total/NA Eurofins Pensacola Page 10 of 16 3/13/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 QC Sample Results Job ID: 400-233963-1Client: Terraquest Environmental Consultants, PC Project/Site: Poco #1 Method: EPA-18 - Volatile Organic Compounds Client Sample ID: Method BlankLab Sample ID: MB 400-614855/2 Matrix: Air - Tedlar Bag Prep Type: Total/NA Analysis Batch: 614855 RL MDL Benzene 125 U 313 125 ppb v/v 03/03/23 15:10 1 MB MB Analyte Dil FacAnalyzedPreparedDUnitResultQualifier 260 U 2601330 ppb v/v 03/03/23 15:10 1Toluene 124 U 124230 ppb v/v 03/03/23 15:10 1Ethylbenzene 230 U 2301150 ppb v/v 03/03/23 15:10 1m-Xylene & p-Xylene 159 U 1591150 ppb v/v 03/03/23 15:10 1o-Xylene 368 U 3681150 ppb v/v 03/03/23 15:10 1Xylenes, Total 499 U 4991390 ppb v/v 03/03/23 15:10 1Methyl tert-butyl ether 12200 U 1220024500 ppb v/v 03/03/23 15:10 1Gasoline Range Organics (GRO)-C6-C10 a,a,a-Trifluorotoluene (fid)100 67-139 03/03/23 15:10 1 MB MB Surrogate Dil FacPreparedAnalyzedQualifierLimits%Recovery 100 03/03/23 15:10 1a,a,a-Trifluorotoluene (pid)76-127 Client Sample ID: Lab Control SampleLab Sample ID: LCS 400-614855/1001 Matrix: Air - Tedlar Bag Prep Type: Total/NA Analysis Batch: 614855 Benzene 15700 15980 ppb v/v 102 85 -115 Analyte LCS LCS DUnitResultQualifier %Rec Spike Added %Rec Limits Toluene 13300 13600 ppb v/v 102 85 -115 Ethylbenzene 11500 12100 ppb v/v 105 85 -115 m-Xylene & p-Xylene 23000 25030 ppb v/v 109 85 -115 o-Xylene 11500 11670 ppb v/v 101 85 -115 Xylenes, Total 34500 36700 ppb v/v 106 85 -115 Methyl tert-butyl ether 27700 27090 ppb v/v 98 85 -115 Gasoline Range Organics (GRO)-C6-C10 196000 198400 ppb v/v 101 85 -115 a,a,a-Trifluorotoluene (fid)67 -139 Surrogate 100 LCS LCS Qualifier Limits%Recovery 100a,a,a-Trifluorotoluene (pid)76 -127 Eurofins Pensacola Page 11 of 16 3/13/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Lab Chronicle Client: Terraquest Environmental Consultants, PC Job ID: 400-233963-1 Project/Site: Poco #1 Client Sample ID: SVE STACK Lab Sample ID: 400-233963-1 Matrix: Air - Tedlar BagDate Collected: 03/02/23 11:10 Date Received: 03/03/23 09:28 Analysis EPA-18 SAB03/03/23 20:291 EET PEN614855 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 5 mL 5 mL Client Sample ID: Method Blank Lab Sample ID: MB 400-614855/2 Matrix: Air - Tedlar BagDate Collected: N/A Date Received: N/A Analysis EPA-18 SAB03/03/23 15:101 EET PEN614855 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 5 mL 5 mL Client Sample ID: Lab Control Sample Lab Sample ID: LCS 400-614855/1001 Matrix: Air - Tedlar BagDate Collected: N/A Date Received: N/A Analysis EPA-18 SAB03/03/23 12:591 EET PEN614855 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 5 mL 5 mL Laboratory References: EET PEN = Eurofins Pensacola, 3355 McLemore Drive, Pensacola, FL 32514, TEL (850)474-1001 Eurofins Pensacola Page 12 of 16 3/13/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Method Summary Job ID: 400-233963-1Client: Terraquest Environmental Consultants, PC Project/Site: Poco #1 Method Method Description LaboratoryProtocol EPAEPA-18 Volatile Organic Compounds EET PEN Protocol References: EPA = US Environmental Protection Agency Laboratory References: EET PEN = Eurofins Pensacola, 3355 McLemore Drive, Pensacola, FL 32514, TEL (850)474-1001 Eurofins Pensacola Page 13 of 16 3/13/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Accreditation/Certification Summary Client: Terraquest Environmental Consultants, PC Job ID: 400-233963-1 Project/Site: Poco #1 Laboratory: Eurofins Pensacola Unless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below. Authority Program Identification Number Expiration Date North Carolina (WW/SW)State 314 12-31-23 The following analytes are included in this report, but the laboratory is not certified by the governing authority. This list may include analytes for which the agency does not offer certification. Analysis Method Prep Method Matrix Analyte EPA-18 Air - Tedlar Bag Benzene EPA-18 Air - Tedlar Bag Ethylbenzene EPA-18 Air - Tedlar Bag Gasoline Range Organics (GRO)-C6-C10 EPA-18 Air - Tedlar Bag Methyl tert-butyl ether EPA-18 Air - Tedlar Bag m-Xylene & p-Xylene EPA-18 Air - Tedlar Bag o-Xylene EPA-18 Air - Tedlar Bag Toluene EPA-18 Air - Tedlar Bag Xylenes, Total Eurofins Pensacola Page 14 of 16 3/13/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Page 15 of 16 3/13/2023 1234567 8 9 10 11 12 13 14 15 Login Sample Receipt Checklist Client: Terraquest Environmental Consultants, PC Job Number: 400-233963-1 Login Number: 233963 Question Answer Comment Creator: Roberts, Alexis J List Source: Eurofins Pensacola List Number: 1 N/ARadioactivity wasn't checked or is </= background as measured by a survey meter. N/AThe cooler's custody seal, if present, is intact. N/ASample custody seals, if present, are intact. TrueThe cooler or samples do not appear to have been compromised or tampered with. N/ASamples were received on ice.Thermal preservation not required. TrueCooler Temperature is acceptable. TrueCooler Temperature is recorded.24.8°C IR8 TrueCOC is present. TrueCOC is filled out in ink and legible. TrueCOC is filled out with all pertinent information. TrueIs the Field Sampler's name present on COC? TrueThere are no discrepancies between the containers received and the COC. TrueSamples are received within Holding Time (excluding tests with immediate HTs) TrueSample containers have legible labels. TrueContainers are not broken or leaking. TrueSample collection date/times are provided. TrueAppropriate sample containers are used. TrueSample bottles are completely filled. N/ASample Preservation Verified. TrueThere is sufficient vol. for all requested analyses, incl. any requested MS/MSDs N/AContainers requiring zero headspace have no headspace or bubble is <6mm (1/4"). TrueMultiphasic samples are not present. TrueSamples do not require splitting or compositing. N/AResidual Chlorine Checked. Eurofins Pensacola Page 16 of 16 3/13/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ANALYTICAL REPORT PREPARED FOR Attn: Ryan Kerins Terraquest Environmental Consultants, PC 100 E. Ruffin Street Mebane, North Carolina 27302 Generated 4/21/2023 1:12:17 PM JOB DESCRIPTION Poco 1 JOB NUMBER 400-236094-1 See page two for job notes and contact information. Pensacola FL 32514 3355 McLemore Drive Eurofins Pensacola Page 1 of 16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Eurofins Pensacola Eurofins Pensacola is a laboratory within Eurofins Environment Testing Southeast, LLC, a company within Eurofins Environment Testing Group of Companies Job Notes This report may not be reproduced except in full, and with written approval from the laboratory. The results relate only to the samples tested. For questions please contact the Project Manager at the e-mail address or telephone number listed on this page. The test results in this report relate only to the samples as received by the laboratory and will meet all requirements of the methodology, with any exceptions noted. This report shall not be reproduced except in full, without the express written approval of the laboratory. All questions should be directed to the Eurofins Environment Testing Southeast, LLC Project Manager. Authorization Generated 4/21/2023 1:12:17 PM Authorized for release by Chad Bechtold, Project Manager Chad.Bechtold@et.eurofinsus.com (813)690-3563 Page 2 of 16 4/21/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Table of Contents Client: Terraquest Environmental Consultants, PC Project/Site: Poco 1 Laboratory Job ID: 400-236094-1 Page 3 of 16 Eurofins Pensacola4/21/2023 Cover Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Case Narrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Detection Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Sample Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Client Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 Surrogate Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 QC Association . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 QC Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 Chronicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 Method Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 Certification Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 Chain of Custody . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 Receipt Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Case Narrative Client: Terraquest Environmental Consultants, PC Job ID: 400-236094-1 Project/Site: Poco 1 Job ID: 400-236094-1 Laboratory: Eurofins Pensacola Narrative Job Narrative 400-236094-1 Receipt The sample was received on 4/14/2023 9:03 AM. Unless otherwise noted below, the sample arrived in good condition. The temperature of the cooler at receipt time was 23.0°C. Thermal preservation is not performed for air samples. Air - GC VOA No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page. Eurofins PensacolaPage 4 of 16 4/21/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Detection Summary Job ID: 400-236094-1Client: Terraquest Environmental Consultants, PC Project/Site: Poco 1 Client Sample ID: SVE Stack Lab Sample ID: 400-236094-1 No Detections. Eurofins Pensacola This Detection Summary does not include radiochemical test results. Page 5 of 16 4/21/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Sample Summary Client: Terraquest Environmental Consultants, PC Job ID: 400-236094-1 Project/Site: Poco 1 Lab Sample ID Client Sample ID Matrix Collected Received 400-236094-1 SVE Stack Air - Tedlar Bag 04/13/23 11:20 04/14/23 09:03 Eurofins PensacolaPage 6 of 16 4/21/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Client Sample Results Job ID: 400-236094-1Client: Terraquest Environmental Consultants, PC Project/Site: Poco 1 Lab Sample ID: 400-236094-1Client Sample ID: SVE Stack Matrix: Air - Tedlar BagDate Collected: 04/13/23 11:20 Date Received: 04/14/23 09:03 Method: EPA-18 - Volatile Organic Compounds RL MDL 125 U 313 125 ppb v/v 04/14/23 13:26 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Benzene 1330 260 ppb v/v 04/14/23 13:26 1260UToluene 230 124 ppb v/v 04/14/23 13:26 1124UEthylbenzene 1150 230 ppb v/v 04/14/23 13:26 1230Um-Xylene & p-Xylene 1150 159 ppb v/v 04/14/23 13:26 1159Uo-Xylene 1150 368 ppb v/v 04/14/23 13:26 1368UXylenes, Total 1390 499 ppb v/v 04/14/23 13:26 1499UMethyl tert-butyl ether 24500 12200 ppb v/v 04/14/23 13:26 112200UGasoline Range Organics (GRO)-C6-C10 a,a,a-Trifluorotoluene (fid)94 67-139 04/14/23 13:26 1 Surrogate Dil FacAnalyzedPreparedQualifierLimits%Recovery a,a,a-Trifluorotoluene (pid)91 04/14/23 13:26 176-127 Eurofins Pensacola Page 7 of 16 4/21/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Definitions/Glossary Job ID: 400-236094-1Client: Terraquest Environmental Consultants, PC Project/Site: Poco 1 Qualifiers Air - GC VOA Qualifier Description U Indicates the analyte was analyzed for but not detected. Qualifier Glossary These commonly used abbreviations may or may not be present in this report. ¤Listed under the "D" column to designate that the result is reported on a dry weight basis Abbreviation %R Percent Recovery CFL Contains Free Liquid CFU Colony Forming Unit CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) Dil Fac Dilution Factor DL Detection Limit (DoD/DOE) DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample DLC Decision Level Concentration (Radiochemistry) EDL Estimated Detection Limit (Dioxin) LOD Limit of Detection (DoD/DOE) LOQ Limit of Quantitation (DoD/DOE) MCL EPA recommended "Maximum Contaminant Level" MDA Minimum Detectable Activity (Radiochemistry) MDC Minimum Detectable Concentration (Radiochemistry) MDL Method Detection Limit ML Minimum Level (Dioxin) MPN Most Probable Number MQL Method Quantitation Limit NC Not Calculated ND Not Detected at the reporting limit (or MDL or EDL if shown) NEG Negative / Absent POS Positive / Present PQL Practical Quantitation Limit PRES Presumptive QC Quality Control RER Relative Error Ratio (Radiochemistry) RL Reporting Limit or Requested Limit (Radiochemistry) RPD Relative Percent Difference, a measure of the relative difference between two points TEF Toxicity Equivalent Factor (Dioxin) TEQ Toxicity Equivalent Quotient (Dioxin) TNTC Too Numerous To Count Eurofins Pensacola Page 8 of 16 4/21/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Surrogate Summary Job ID: 400-236094-1Client: Terraquest Environmental Consultants, PC Project/Site: Poco 1 Method: EPA-18 - Volatile Organic Compounds Prep Type: Total/NAMatrix: Air - Tedlar Bag Lab Sample ID Client Sample ID (67-139)(76-127) TFT-F TFT-P 94 91400-236094-1 Percent Surrogate Recovery (Acceptance Limits) SVE Stack 92 91LCS 400-620862/1003 Lab Control Sample 92 90MB 400-620862/4 Method Blank Surrogate Legend TFT-F = a,a,a-Trifluorotoluene (fid) TFT-P = a,a,a-Trifluorotoluene (pid) Eurofins Pensacola Page 9 of 16 4/21/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 QC Association Summary Job ID: 400-236094-1Client: Terraquest Environmental Consultants, PC Project/Site: Poco 1 Air - GC VOA Analysis Batch: 620862 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch Air - Tedlar Bag EPA-18400-236094-1 SVE Stack Total/NA Air - Tedlar Bag EPA-18MB 400-620862/4 Method Blank Total/NA Air - Tedlar Bag EPA-18LCS 400-620862/1003 Lab Control Sample Total/NA Eurofins Pensacola Page 10 of 16 4/21/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 QC Sample Results Job ID: 400-236094-1Client: Terraquest Environmental Consultants, PC Project/Site: Poco 1 Method: EPA-18 - Volatile Organic Compounds Client Sample ID: Method BlankLab Sample ID: MB 400-620862/4 Matrix: Air - Tedlar Bag Prep Type: Total/NA Analysis Batch: 620862 RL MDL Benzene 125 U 313 125 ppb v/v 04/14/23 11:59 1 MB MB Analyte Dil FacAnalyzedPreparedDUnitResultQualifier 260 U 2601330 ppb v/v 04/14/23 11:59 1Toluene 124 U 124230 ppb v/v 04/14/23 11:59 1Ethylbenzene 230 U 2301150 ppb v/v 04/14/23 11:59 1m-Xylene & p-Xylene 159 U 1591150 ppb v/v 04/14/23 11:59 1o-Xylene 368 U 3681150 ppb v/v 04/14/23 11:59 1Xylenes, Total 499 U 4991390 ppb v/v 04/14/23 11:59 1Methyl tert-butyl ether 12200 U 1220024500 ppb v/v 04/14/23 11:59 1Gasoline Range Organics (GRO)-C6-C10 a,a,a-Trifluorotoluene (fid)92 67-139 04/14/23 11:59 1 MB MB Surrogate Dil FacPreparedAnalyzedQualifierLimits%Recovery 90 04/14/23 11:59 1a,a,a-Trifluorotoluene (pid)76-127 Client Sample ID: Lab Control SampleLab Sample ID: LCS 400-620862/1003 Matrix: Air - Tedlar Bag Prep Type: Total/NA Analysis Batch: 620862 Benzene 15700 15260 ppb v/v 97 85 -115 Analyte LCS LCS DUnitResultQualifier %Rec Spike Added %Rec Limits Toluene 13300 13080 ppb v/v 99 85 -115 Ethylbenzene 11500 11500 ppb v/v 100 85 -115 m-Xylene & p-Xylene 23000 20940 ppb v/v 91 85 -115 o-Xylene 11500 10960 ppb v/v 95 85 -115 Xylenes, Total 34500 31890 ppb v/v 92 85 -115 Methyl tert-butyl ether 27700 26630 ppb v/v 96 85 -115 Gasoline Range Organics (GRO)-C6-C10 196000 188400 ppb v/v 96 85 -115 a,a,a-Trifluorotoluene (fid)67 -139 Surrogate 92 LCS LCS Qualifier Limits%Recovery 91a,a,a-Trifluorotoluene (pid)76 -127 Eurofins Pensacola Page 11 of 16 4/21/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Lab Chronicle Client: Terraquest Environmental Consultants, PC Job ID: 400-236094-1 Project/Site: Poco 1 Client Sample ID: SVE Stack Lab Sample ID: 400-236094-1 Matrix: Air - Tedlar BagDate Collected: 04/13/23 11:20 Date Received: 04/14/23 09:03 Analysis EPA-18 SAB04/14/23 13:261 EET PEN620862 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 5 mL 5 mL Client Sample ID: Method Blank Lab Sample ID: MB 400-620862/4 Matrix: Air - Tedlar BagDate Collected: N/A Date Received: N/A Analysis EPA-18 SAB04/14/23 11:591 EET PEN620862 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 5 mL 5 mL Client Sample ID: Lab Control Sample Lab Sample ID: LCS 400-620862/1003 Matrix: Air - Tedlar BagDate Collected: N/A Date Received: N/A Analysis EPA-18 SAB04/14/23 11:101 EET PEN620862 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 5 mL 5 mL Laboratory References: EET PEN = Eurofins Pensacola, 3355 McLemore Drive, Pensacola, FL 32514, TEL (850)474-1001 Eurofins Pensacola Page 12 of 16 4/21/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Method Summary Job ID: 400-236094-1Client: Terraquest Environmental Consultants, PC Project/Site: Poco 1 Method Method Description LaboratoryProtocol EPAEPA-18 Volatile Organic Compounds EET PEN Protocol References: EPA = US Environmental Protection Agency Laboratory References: EET PEN = Eurofins Pensacola, 3355 McLemore Drive, Pensacola, FL 32514, TEL (850)474-1001 Eurofins Pensacola Page 13 of 16 4/21/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Accreditation/Certification Summary Client: Terraquest Environmental Consultants, PC Job ID: 400-236094-1 Project/Site: Poco 1 Laboratory: Eurofins Pensacola Unless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below. Authority Program Identification Number Expiration Date North Carolina (WW/SW)State 314 12-31-23 The following analytes are included in this report, but the laboratory is not certified by the governing authority. This list may include analytes for which the agency does not offer certification. Analysis Method Prep Method Matrix Analyte EPA-18 Air - Tedlar Bag Benzene EPA-18 Air - Tedlar Bag Ethylbenzene EPA-18 Air - Tedlar Bag Gasoline Range Organics (GRO)-C6-C10 EPA-18 Air - Tedlar Bag Methyl tert-butyl ether EPA-18 Air - Tedlar Bag m-Xylene & p-Xylene EPA-18 Air - Tedlar Bag o-Xylene EPA-18 Air - Tedlar Bag Toluene EPA-18 Air - Tedlar Bag Xylenes, Total Eurofins Pensacola Page 14 of 16 4/21/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Page 15 of 16 4/21/2023 1234567 8 9 10 11 12 13 14 15 Login Sample Receipt Checklist Client: Terraquest Environmental Consultants, PC Job Number: 400-236094-1 Login Number: 236094 Question Answer Comment Creator: Whitley, Adrian List Source: Eurofins Pensacola List Number: 1 N/ARadioactivity wasn't checked or is </= background as measured by a survey meter. N/AThe cooler's custody seal, if present, is intact. N/ASample custody seals, if present, are intact. TrueThe cooler or samples do not appear to have been compromised or tampered with. FalseSamples were received on ice.Thermal preservation not required. TrueCooler Temperature is acceptable. TrueCooler Temperature is recorded.23.0°C IR8 TrueCOC is present. TrueCOC is filled out in ink and legible. TrueCOC is filled out with all pertinent information. TrueIs the Field Sampler's name present on COC? TrueThere are no discrepancies between the containers received and the COC. TrueSamples are received within Holding Time (excluding tests with immediate HTs) TrueSample containers have legible labels. TrueContainers are not broken or leaking. TrueSample collection date/times are provided. TrueAppropriate sample containers are used. TrueSample bottles are completely filled. N/ASample Preservation Verified. TrueThere is sufficient vol. for all requested analyses, incl. any requested MS/MSDs N/AContainers requiring zero headspace have no headspace or bubble is <6mm (1/4"). TrueMultiphasic samples are not present. TrueSamples do not require splitting or compositing. N/AResidual Chlorine Checked. Eurofins Pensacola Page 16 of 16 4/21/2023 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 APPENDIX E