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Home My WebLink AboutFA-7737_42024_CA_MRP_20230420 i Table of Contents A. SITE INFORMATION ............................................................................................................................................... 1 1. Site Identification .............................................................................................................................................. 1 2. Contacts Associated with the Leaking UST System. .......................................................................................... 1 3. Information about the Release: ........................................................................................................................ 2 B. EXECUTIVE SUMMARY ........................................................................................................................................... 3 C. SITE HISTORY AND CHARACTERIZATION ............................................................................................................... 4 1. UST Owner and Operator Information: ............................................................................................................. 4 2. UST Information: ............................................................................................................................................... 4 3. Non-UST Information: ....................................................................................................................................... 5 4. Location of Current UST System Relative to Historical Releases....................................................................... 5 5. Site Characteristics: ........................................................................................................................................... 5 6. Property Owners and Occupants ...................................................................................................................... 6 7. Receptors and Potential Receptors ................................................................................................................... 6 8. Implementation of the Remedial Plan .............................................................................................................. 7 9. Progress of Remediation ................................................................................................................................... 8 D. CURRENT SITE ASSESSMENT INFORMATION ......................................................................................................... 8 E. FREE PRODUCT REMOVAL ................................................................................................................................. 8 F. MONITORED NATURAL ATTENUATION ............................................................................................................. 9 G. CONCLUSIONS ....................................................................................................................................................... 9 H. STATEMENTS AND CERTIFICATION .................................................................................................................. 10 Tables Table 1: Monitoring Well Construction Data Table 2: Chronologic Listing of Groundwater Elevations Table 2: Listing of Groundwater Chemistry – February 15, 2023 Table 4: Chronologic Listing of Groundwater Chemistry Table 5: Listing of Surface Water Chemistry – February 15, 2023 Figures Figure 1: Topographic Location Map Figure 2: Vicinity Map Figure 3: Site Map with Monitoring Well Locations Figure 4: Approximate Distribution of Benzene in Groundwater Figure 5: Approximate Distribution of Ethylbenzene in Groundwater Figure 6: Approximate Distribution of MTBE in Groundwater Figure 7: Approximate Distribution of Naphthalene in Groundwater Figure 8: Approximate Distribution of Total Xylenes in Groundwater Appendices Appendix A: Laboratory Analytical Report with Chain of Custody ii THIS PAGE INTENTIONALLY BLANK Exxon Shop No. 4 Monitoring Report HEA Project No. 17-1008 April 20, 2023 1 Monitoring Report A. SITE INFORMATION 1. Site Identification Date of Report: April 20, 2023 Facility I.D.: 00-0-0000026302 UST Incident Number (if known): 42024 Site Name: Exxon Shop No. 4 Site Street Address: 1755 N. Roberts Avenue (Highway 211) City/Town: Lumberton Zip Code: 28538 County: Robeson Description of Geographical Data Point (e.g., dispenser): Center Former UST Basin Location Method (GPS, topographical map, other): GIS Latitude (decimal degrees): 34.632002 Longitude (decimal degrees): 78.992544 2. Contacts Associated with the Leaking UST System (Addresses must include street, city, state, zip code and mailing address, if different). UST Owner: Red Springs Fuel Oil Company, Inc. Address: P.O. Box 827, Red Springs, NC 28377 Tel.: (910) 843-4148 UST Operator: Red Springs Fuel Oil Company, Inc. Address: P.O. Box 827, Red Springs, NC 28377 Tel: (910) 843-4148 Property Owner: RSO Holdings, LLC Address: P.O. Box 637, Elizabethtown, NC 28337 Tel: (910) 862-8423 Property Occupant: Minuteman No. 38 (C-Store) Address: 1755 N. Roberts Avenue, Lumberton NC 28358 Tel: (910) 739-0724 Consultant: Haggett Engineering Associates, Inc. Address: 5307 South College Road, Wilmington NC 28412 Tel: (910) 397-0808 Contractor: Environmental Hydrogeological Consultants, Inc. Address: 207 W. 4th Avenue, Red Springs NC 28377 Tel: (910) 843-4456 Analytical Laboratory: Pace Analytical State Certification No.: ENV375 Address: 12065 Lebanon Road, Mt. Juliet TN 37122 Tel: (800) 767-5859 Exxon Shop No. 4 Monitoring Report HEA Project No. 17-1008 April 20, 2023 2 3. Information about the Release: Date Discovered: October 4, 2016 (per UST-61) Estimated Quantity of Release: unknown Cause of Release: unknown Source of Release (Dispenser/Piping/UST): UST System Sizes and contents of UST system(s) from which the release occurred): Unknown. There are four (4) UST’s with the basin. Refer to UST Information in C.2 below. Exxon Shop No. 4 Monitoring Report HEA Project No. 17-1008 April 20, 2023 3 B. EXECUTIVE SUMMARY On November 23, 2016 the Division of Waste Management (DWM) issued a Notice of Regulatory Requirements (NORR) to complete a Site Check. The Site Check Report was received by DWM on April 10, 2017 and indicated that the concentrations of petroleum hydrocarbons reported in samples collected at the site exceeded the applicable standards. Therefore, DWM issued a NORR on April 27, 2017 requesting the completion of a Limited Site Assessment (LSA). On July 18, 2017, the property was purchased by RSO Holdings, LLS and is currently occupied by the Minuteman No. 38 convenience store. The LSA was submitted to the Division on November 30, 2017. On December 14, 2017 the Division issued a NORR requesting additional assessment to delineate the plume in proximity to the creek. Monitoring reports are submitted to the Division approximately every 6 months. EHC visited the site on February 15, 2023 to gauge the wells and collect groundwater samples. The monitoring wells were reported to contain concentrations of hydrocarbon constituents exceeding the 15A NCAC 2L standards and the 15A NCAC 2B standards for surface waters. Monitoring well MW-5 appears has a bend in the casing, but was gauged and sampled during this event. Overall concentrations at the site have decreased since the August 25, 2022 sampling event. Increases were reported in the wells installed within the UST Basin. The horizontal delineation of the plume is not complete on the site. Samples collected from the creek do not indicate the presence of constituents in excess of the surface water protection standards. The area surrounding the site is served by public water and sewer according to the City of Lumberton. No wells have been identified within 1,500 feet of the site. Meadow Branch, a Class C surface water, is located approximately 45-feet from the UST Basin. The locations for the monitoring wells, UST Basin and Meadow Branch are visible on Figure 3. Based on the results of the laboratory analysis, HEA recommends the sampling of the monitoring wells proximal to the creek (MW-1, MW-2, MW-3 and MW-7) quarterly for the next three quarters. If the concentrations drop and remain below 10 times those listed for Class C Surface Waters (15A NCAC 2B .0211) the incident should be considered for closure. Exxon Shop No. 4 Monitoring Report HEA Project No. 17-1008 April 20, 2023 4 C. SITE HISTORY AND CHARACTERIZATION 1. UST Owner and Operator Information: UST ID Number 1 through 4 Facility ID Number 0-0-0000026302 Name of Owner Dates of Operation (mm/dd/yy to mm/dd/yy) Red Springs Fuel Oil Company, Inc. 12/3/1989 to 7/18/2017 Street Address P.O. Box 827 City State Zip Telephone Number Red Springs NC 28377 (910) 843-4148 Name of Operator Dates of Operation (mm/dd/yy to mm/dd/yy) Red Springs Fuel Oil Company, Inc. 12/3/1989 to 7/18/2017 Street Address P.O. Box 827 City State Zip Telephone Number Red Springs NC 28377 (910) 843-4148 Incident Number 42024 Name of Other Responsible Party Dates of Release(s) (mm/dd/yy to mm/dd/yy) N/A Unknown Street Address City State Zip Telephone Number 2. UST Information: UST ID Number Last Contents of Tank Previous Contents of Tank Tank Capacity (gallons) Construction (material) Tank Dimensions Description of Piping & Pumps Installation Date Status of UST Release associated with Tank, Piping or Pump 1 Diesel Fuel N/A 5,000 SW/FRP 8’ Ø x 17’-8” L SW FRP Pipe, STP 12/3/1989 Active Yes Exxon Shop No. 4 Monitoring Report HEA Project No. 17-1008 April 20, 2023 5 UST ID Number Last Contents of Tank Previous Contents of Tank Tank Capacity (gallons) Construction (material) Tank Dimensions Description of Piping & Pumps Installation Date Status of UST Release associated with Tank, Piping or Pump 2 Gasoline Plus N/A 10,000 SW/FRP 8’ Ø x 31’-6” L SW FRP Pipe, STP 12/3/1989 Active Yes 3 Gasoline Premium N/A 10,000 SW/FRP 8’ Ø x 31’-6” L SW FRP Pipe, STP 12/3/1989 Active Yes 4 Gasoline Regular N/A 10,000 SW/FRP 8’ Ø x 31’-6” L SW FRP Pipe, STP 12/3/1989 Active Yes 3. Non-UST Information: Not Applicable. 4. Location of Current UST System Relative to Historical Releases (UST, Non-UST releases, and Off-site releases): The current UST system is located in the northeast corner of the property near the intersection of Roberts Avenue (NC 211) and Elizabethtown Road (NC 41). No other releases have been identified. 5. Site Characteristics: The property is currently owned by RSO Holdings, LLC according to records obtained from the Robeson County GIS and is occupied by convenience store and car wash. Most of the site is covered with impervious pavement typical of a convenience store. The area between the UST basin and Meadow Branch is vegetated with grass and small shrubs. A copy of the 2016 USGS topographic map is provided as Figure 1. Information from the quadrangles indicates that surface water flow from the site is to the northeast towards Meadow Branch Figure 2 provides a Vicinity Map based on the 2021 aerial photography. A Site Map with Monitoring Well Locations is provided as Figure 3. During the February 15, 2023 sampling event the groundwater was observed at depths ranging from 7.75 feet BLS to 11.21 feet BLS. Table 2 provides a chronologic listing of Exxon Shop No. 4 Monitoring Report HEA Project No. 17-1008 April 20, 2023 6 groundwater elevations. Water levels recorded within the UST Basin (MW-1, MW-2 & MW-3) appear to indicate a perched water condition likely due to the gravel backfill. Groundwater flow at the site is to the east or northeast towards Meadow Branch which is located approximately 45 feet from the UST Basin. Soil at the site has been reported to be primarily fine to medium sand with some silt. One deep boring was advanced to a depth of approximately 40 feet BLS to determine is a confining layer was present. No confining layer was found during the investigation. No information is available concerning the depth to rock. The aquifer thickness is unknown. 6. Property Owners and Occupants PIN Owner/ Occupant Name (Last, First MI) Property Address 030220257200 Lumberton Developers, LLC / Big Lots 1731 N. Roberts Avenue Lumberton, NC 28358 030220257200 Lumberton Developers, LLC / Fresh Foods IGA 1733 N. Roberts Avenue Lumberton, NC 28358 030229257200 Lumberton Developers, LLC / Citi Trends 1755 N. Roberts Avenue Lumberton, NC 28358 7. Receptors and Potential Receptors Water Supply Wells Well ID Well Owner / User (indicate which) Latitude (decimal degrees) Longitude (decimal degrees) Well Use Distance from source area of release (ft.) Up or Downgradient None Identified Exxon Shop No. 4 Monitoring Report HEA Project No. 17-1008 April 20, 2023 7 Surface Water Receptor ID Description of Geographical Point Latitude (decimal degrees Longitude (decimal degrees) Description of Receptor Distance from source area of release (ft.) Up or Downgradient SW-1 Top Bank 34.632131 78.992530 Meadow Branch 45 D Wellhead Protection Areas Receptor ID Description of Geographical Point Latitude (decimal degrees Longitude (decimal degrees) Description of Receptor Distance from source area of release (ft.) Up or Downgradient None Subsurface Structures Receptor ID Description of Geographical Point Latitude (decimal degrees Longitude (decimal degrees) Description of Receptor Distance from source area of release (ft.) Up or Downgradient SD-1 Drop Inlet 34.631867 78.992723 Storm Drain 54 U The storm drain appears to connect to the NCDOT roadside system. 8. Implementation of the Remedial Plan Not Applicable Exxon Shop No. 4 Monitoring Report HEA Project No. 17-1008 April 20, 2023 8 9. Progress of Remediation Not Applicable D. CURRENT SITE ASSESSMENT INFORMATION Nine shallow (type II) monitoring wells have been previously installed on the site. Well Construction Records for MW-1 through MW-6 were not available. The total depths for these wells were measured during previous sampling events. On February 15, 2023, groundwater samples were collected from monitoring wells MW-1 through MW-9. In addition, three surface water samples were collected from the creek. Samples from the monitoring wells were submitted to Pace Analytical in Mt. Juliet, TN for analysis. The analysis was completed using EPA method 6200B. • Table 1 provides information concerning the construction of the monitoring wells. • Tables 2 provides a chronologic listing of the groundwater elevations. • Table 3 provides a listing of the groundwater chemistry from the February 15, 2023 sampling event. • Table 4 provides a chronologic listing of the groundwater chemistry which illustrates changes in the concentrations with color coded results. • Table 5 provided a listing of the surface water chemistry from the February 15, 2023 sampling event. Monitoring wells were reported to contain concentrations of hydrocarbon constituents exceeding the 15A NCAC 2L standards. Monitoring well MW-1 was reported to contain concentrations of toluene which exceed 10 times the standard for Class C surface waters. Monitoring well MW-1 is located within the UST basin in close proximity to Meadow Branch. A copy of the Laboratory Analytical Report with Chain of Custody Form is provided in Appendix “A”. E. FREE PRODUCT REMOVAL Not Applicable Exxon Shop No. 4 Monitoring Report HEA Project No. 17-1008 April 20, 2023 9 F. MONITORED NATURAL ATTENUATION Not Applicable G. CONCLUSIONS Concentrations of petroleum hydrocarbon constituents in most of the monitoring wells are above the 15A NCAC 2L groundwater standards. In addition, toluene was reported in monitoring wells MW-1 at more than 10 times the 15A NCAC 2B standard for the protection of Class C surface waters. Overall concentrations for hydrocarbon constituents have dropped since the previous sampling completed on August 25, 2022. Concentrations within the UST Basin (MW-1, MW-2 & MW-3) have increased. Horizontal delineation of the petroleum hydrocarbon constituents on the site is not complete. The UST basin at this site is located in close proximity to Meadow Branch, a Class C surface water. Based on the results of the laboratory analysis, HEA recommends the sampling of the monitoring wells proximal to the creek (MW-1, MW-2, MW-3 and MW-7) quarterly for the next three quarters. If the concentrations drop and remain below 10 times those listed for Class C Surface Waters (15A NCAC 2B .0211) the incident should be considered for closure. Quarterly sampling should begin during the first week of June 2023. Subsequent sampling should be completed during the first week of September 2023 and the first week of December 2023. Exxon Shop No. 4 Monitoring Report HEA Project No. 17-1008 April 20, 2023 Tables Table 1: Monitoring Well Construction Data Table 2: Chronologic Listing of Groundwater Elevations Table 3: Listing of Groundwater Chemistry – February 15, 2023 Table 4: Chronologic Listing of Groundwater Chemistry Table 5: Listing of Surface Water Chemistry – February 15, 2023 Monitoring Well Date Casing Total Screened Slot TOC Cover Completed Diameter Depth Interval Size Elevation Type (inch)(feet)(feet BGS)(inch)(feet) MW-1 3-Dec-89 2 20.0 unknown 0.010 134.96 flush MW-2 3-Dec-89 2 20.0 unknown 0.010 135.06 flush MW-3 3-Dec-89 2 12.0 unknown 0.010 134.73 flush MW-4 3-Dec-89 2 18.0 unknown 0.010 135.30 flush MW-5 3-Dec-89 2 20.0 unknown 0.010 135.33 flush MW-6 3-Dec-89 2 15.0 unknown 0.010 135.29 flush MW-7 12-Dec-18 2 20.0 5 to 20 0.010 135.14 flush MW-8 12-Dec-18 2 20.0 5 to 20 0.010 135.01 flush MW-9 25-Jul-19 2 20.0 5 to 20 0.010 135.07 flush Notes: Well casing elevations are from a survey by Robert E. Leach II, PLS and are relative to NAVD 1988. Monitoring wells MW-1 through MW-6 were installed as part of the UST System for monitoring. No well construction records were found for MW-1 through MW-6. Total depths were measured. Exxon Shop No. 4 1755 N. Roberts Avenue Lumberton, North Carolina 28358 Monitoring Well Construction Data Table 1 Page 1 Monitoring Well TOC Screen Date Depth to Depth to NAPL Groundwater Elevation Interval NAPL Water Thickness Elevation (feet)(feet)(feet)(feet)(feet)(feet) MW-1 134.96 3.3 to 7.3 9/27/2017 NA 8.15 0.00 126.81 12/17/2018 NA 6.39 0.00 128.57 8/6/2019 NA 8.18 0.00 126.78 8/19/2021 NA 7.68 0.00 127.28 8/25/2022 NA 9.62 0.00 125.34 2/15/2023 NA 7.81 0.00 127.15 MW-2 135.06 1 to 11 9/27/2017 NA 8.13 0.00 126.93 12/17/2018 NA 6.39 0.00 128.67 8/6/2019 NA 8.19 0.00 126.87 8/19/2021 NA 7.68 0.00 127.38 8/25/2022 NA 9.64 0.00 125.42 2/15/2023 NA 7.75 0.00 127.31 MW-3 134.73 1 to 11 9/27/2017 NA 8.10 0.00 126.63 12/17/2018 NA 6.38 0.00 128.35 8/6/2019 NA 7.96 0.00 126.77 8/25/2022 NA 9.39 0.00 125.34 2/15/2023 NA 7.59 0.00 127.14 MW-4 135.30 1 to 11 9/27/2017 NA 8.64 0.00 126.66 12/17/2018 NA 6.74 0.00 128.56 8/6/2019 NA 9.53 0.00 125.77 8/19/2021 NA 8.37 0.00 126.93 8/25/2022 NA 11.27 0.00 124.03 2/15/2023 NA 9.91 0.00 125.39 MW-5 135.33 1 to 11 9/27/2017 NA 9.75 0.00 125.58 12/17/2018 NA 7.12 0.00 128.21 8/6/2019 NA 10.23 0.00 125.10 8/19/2021 NA 8.56 0.00 126.77 8/25/2022 NA DRY 0.00 NA 2/15/2023 NA 11.21 0.00 124.12 Exxon Shop No. 4 1755 N. Roberts Avenue Lumberton, North Carolina 28358 Chronologic Listing of Groundwater Elevations Table 2 Page 1 of 2 Monitoring Well TOC Screen Date Depth to Depth to NAPL Groundwater Elevation Interval NAPL Water Thickness Elevation (feet)(feet)(feet)(feet)(feet)(feet) Chronologic Listing of Groundwater Elevations MW-6 135.29 1 to 11 9/27/2017 NA 9.92 0.00 125.37 12/17/2018 NA 5.99 0.00 129.30 8/6/2019 NA 9.54 0.00 125.75 8/19/2021 NA 9.96 0.00 125.33 8/25/2022 NA 11.89 0.00 123.40 2/15/2023 NA 10.09 0.00 125.20 MW-7 135.14 5 to 20 12/17/2018 NA 7.48 0.00 127.66 8/6/2019 NA 9.73 0.00 125.41 8/19/2021 NA 8.43 0.00 126.71 8/25/2022 NA 10.54 0.00 124.60 2/15/2023 NA 8.53 0.00 126.61 MW-8 135.01 5 to 20 12/17/2018 NA 6.08 0.00 128.93 8/6/2019 NA 9.77 0.00 125.24 8/19/2021 NA 8.95 0.00 126.06 8/25/2022 NA 11.59 0.00 123.42 2/15/2023 NA 9.59 0.00 125.42 MW-9 135.07 5 to 20 8/6/2019 NA 9.47 0.00 125.60 8/19/2021 NA 8.45 0.00 126.62 8/25/2022 NA 11.51 0.00 123.56 2/15/2023 NA 9.81 0.00 125.26 Notes:Casing elevations surveyed by Robert E. Leach II, PLS and are relative to NAVD 1988. Groundwater elevations are corrected for product thickness when applicable. Table 2 Page 2 of 2 Method Constituent MW-1 MW-2 MW-3 MW-4 MW-5 MW-6 MW-7 MW-8 MW-9 2L GCL Well Depth20 feet 20 feet 12 feet 18 feet 20 feet 20 feet 20 feet 20 feet 20 feet GWQS Sample Locationwell well well well well well well well well Volatile Organic Compounds 6200B Acetone BDL BDL BDL BDL BDL BDL BDL BDL BDL Acrolein BDL BDL BDL BDL BDL BDL BDL BDL BDL Acrylonitrile BDL BDL BDL BDL BDL BDL BDL BDL BDL Benzene 397 186 107 BDL BDL 102 63 BDL BDL 1 5000 Bromobenzene BDL BDL BDL BDL BDL BDL BDL BDL BDL Bromodichloromethane BDL BDL BDL BDL BDL BDL BDL BDL BDL Bromoform BDL BDL BDL BDL BDL BDL BDL BDL BDL Bromomethane BDL BDL BDL BDL BDL BDL BDL BDL BDL N-Butylbenzene 75.4 48.9 BDL BDL BDL BDL BDL BDL BDL 70 6900 Sec-Butylbenzene 37.3 25.6 BDL BDL BDL BDL BDL BDL BDL 70 8500 Tert-Butylbenzene BDL BDL BDL BDL BDL BDL BDL BDL BDL Carbon Tetrachloride BDL BDL BDL BDL BDL BDL BDL BDL BDL Chlorobenzene BDL BDL BDL BDL BDL BDL BDL BDL BDL Chlorodibromomethane BDL BDL BDL BDL BDL BDL BDL BDL BDL Chloroethane BDL BDL BDL BDL BDL BDL BDL BDL BDL Chloroform BDL BDL BDL BDL BDL BDL BDL BDL BDL Chloromethane BDL BDL BDL BDL BDL BDL BDL BDL BDL 2-Chlorotoluene BDL BDL BDL BDL BDL BDL BDL BDL BDL 4-Chlorotoluene BDL BDL BDL BDL BDL BDL BDL BDL BDL Exxon Shop No. 4 1755 N. Roberts Avenue Lumberton, North Carolina 28358 Listing of Groundwater Chemistry - February 15, 2022 Table 3 Page 1 of 4 Method Constituent MW-1 MW-2 MW-3 MW-4 MW-5 MW-6 MW-7 MW-8 MW-9 2L GCL Well Depth20 feet 20 feet 12 feet 18 feet 20 feet 20 feet 20 feet 20 feet 20 feet GWQS Sample Locationwell well well well well well well well well Listing of Groundwater Chemistry - February 15, 2022 6200B 1,2-Dibromo-3-Chloropropane BDL BDL BDL BDL BDL BDL BDL BDL BDL 1,2-Dibromoethane BDL BDL BDL BDL BDL BDL BDL BDL BDL Dibromomethane BDL BDL BDL BDL BDL BDL BDL BDL BDL 1,2-Dichlorobenzene BDL BDL BDL BDL BDL BDL BDL BDL BDL 1,3-Dichlorobenzene BDL BDL BDL BDL BDL BDL BDL BDL BDL 1,4-Dichlorobenzene BDL BDL BDL BDL BDL BDL BDL BDL BDL Dichlorodifluoromethane BDL BDL BDL BDL BDL BDL BDL BDL BDL 1,1-Dichloroethane BDL BDL BDL BDL BDL BDL BDL BDL BDL 1,2-Dichloroethane BDL BDL BDL BDL BDL BDL BDL BDL BDL 1,1-Dichloroethene BDL BDL BDL BDL BDL BDL BDL BDL BDL Cis-1,2-Dichloroethene BDL BDL BDL BDL BDL BDL BDL BDL BDL Trans-1,2-Dichloroethene BDL BDL BDL BDL BDL BDL BDL BDL BDL 1,2-Dichloropropane BDL BDL BDL BDL BDL BDL BDL BDL BDL 1,1-Dichloropropene BDL BDL BDL BDL BDL BDL BDL BDL BDL 1,3-Dichloropropane BDL BDL BDL BDL BDL BDL BDL BDL BDL 2,2-Dichloropropane BDL BDL BDL BDL BDL BDL BDL BDL BDL Di-Isopropyl Ether BDL BDL BDL BDL BDL BDL BDL BDL BDL 70 70000 Ethylbenzene 189 124 32.6 BDL BDL 684 BDL BDL BDL 600 84500 Hexachloro-1,3-Butadiene BDL BDL BDL BDL BDL BDL BDL BDL BDL Isopropylbenzene 148 118 20.2 BDL BDL 38.7 31.8 BDL BDL 70 25000 P-Isopropyltoluene BDL BDL BDL BDL BDL BDL BDL BDL BDL 25 11700 2-Butanone (Mek)BDL BDL BDL BDL BDL BDL BDL BDL BDL Methylene Chloride BDL BDL BDL BDL BDL BDL BDL BDL BDL Table 3 Page 2 of 4 Method Constituent MW-1 MW-2 MW-3 MW-4 MW-5 MW-6 MW-7 MW-8 MW-9 2L GCL Well Depth20 feet 20 feet 12 feet 18 feet 20 feet 20 feet 20 feet 20 feet 20 feet GWQS Sample Locationwell well well well well well well well well Listing of Groundwater Chemistry - February 15, 2022 6200B 4-Methyl-2-Pentanone (Mibk)BDL BDL BDL BDL BDL BDL BDL BDL BDL Methyl Tert-Butyl Ether BDL BDL BDL 45.4 17.8 364 BDL BDL 14.1 20 20000 Naphthalene 262 201 BDL BDL BDL 131 125 BDL BDL 6 6000 N-Propylbenzene 626 467 68.7 BDL BDL 108 35.9 BDL BDL 70 30000 Styrene BDL BDL BDL BDL BDL BDL BDL BDL BDL 1,1,1,2-Tetrachloroethane BDL BDL BDL BDL BDL BDL BDL BDL BDL 1,1,2,2-Tetrachloroethane BDL BDL BDL BDL BDL BDL BDL BDL BDL Tetrachloroethene BDL BDL BDL BDL BDL BDL BDL BDL BDL Toluene 183 47.4 27.7 BDL BDL 91.7 BDL BDL BDL 600 260000 1,2,3-Trichlorobenzene BDL BDL BDL BDL BDL BDL BDL BDL BDL 1,2,4-Trichlorobenzene BDL BDL BDL BDL BDL BDL BDL BDL BDL 1,1,1-Trichloroethane BDL BDL BDL BDL BDL BDL BDL BDL BDL 1,1,2-Trichloroethane BDL BDL BDL BDL BDL BDL BDL BDL BDL Trichloroethene BDL BDL BDL BDL BDL BDL BDL BDL BDL Trichlorofluoromethane BDL BDL BDL BDL BDL BDL BDL BDL BDL 1,2,3-Trichloropropane BDL BDL BDL BDL BDL BDL BDL BDL BDL 1,2,4-Trimethylbenzene 78.7 BDL BDL BDL BDL 929 77.1 BDL BDL 400 28500 1,3,5-Trimethylbenzene 32.5 BDL BDL BDL BDL 222 BDL BDL BDL 400 25000 Vinyl Chloride BDL BDL BDL BDL BDL BDL BDL BDL BDL O-Xylene 23.1 5.56 BDL BDL BDL 1370 BDL BDL BDL M&P-Xylene 38.6 10.5 BDL BDL BDL 2560 67.4 BDL BDL Total Xylenes 61.7 16.1 BDL BDL BDL 3930 67.4 BDL BDL 500 85500 Ethanol BDL BDL BDL BDL BDL BDL BDL BDL BDL Table 3 Page 3 of 4 Method Constituent MW-1 MW-2 MW-3 MW-4 MW-5 MW-6 MW-7 MW-8 MW-9 2L GCL Well Depth20 feet 20 feet 12 feet 18 feet 20 feet 20 feet 20 feet 20 feet 20 feet GWQS Sample Locationwell well well well well well well well well Listing of Groundwater Chemistry - February 15, 2022 6200B Ethyl Tert-Butyl Ether BDL BDL BDL BDL BDL BDL BDL BDL BDL T-Amyl Alcohol BDL BDL BDL BDL BDL BDL BDL BDL 91.9 40 40000 Tert-Butyl Alcohol 91 69.3 65.8 17.1 7.16 129 55.5 BDL 200 10 10000 Tert-Amyl Methyl Ether BDL BDL BDL 1.96 1.40 121 BDL BDL BDL 128 12800 Notes:BDL = Below Detection Limit NA = Constituent Not Analyzed Results are presented in ug/l. Values in Green are above the detection limit, but below the 2L Standard. Values in Red Bold exceed the 15A NCAC 2L Class GA groundwater quality standard. Values in Red Bold Italic exceed the 9/18/2014 Gross Contamination Level (GCL). Table 3 Page 4 of 4 Benzene n-Butylbenzene sec-Butylbenzene Di-isopropyl ether Ethylbenzene Isopropylbenzene p-Isopropyltoluene 2-Butanone (MEK) Methyl-tert-butyl-ether Naphthalene n-Propylbenzene Styrene Toluene 1,2,4-Trimethylbenzene 1,3,5-Trimethylbenzene O-Xylene M&P-Xylenes Xylenes, Totalt-Amyl Alcoholtert-Butyl Alcoholtert-amyl Methyl Etherµg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l Sample Collect ID Date MW-1 9/21/2016 125 NA NA BDL 776 NA NA NA 3.30 361 NA NA 40.4 NA NA NA NA 440 NA NA NA 9/27/2017 112 33.0 19.7 BDL 516 131 5.59 BDL BDL 437 415 BDL 10.7 585 139 9.25 113 122.25 NA NA NA 12/17/2018 75.8 BDL 19.9 BDL 160 127 BDL BDL BDL 211 397 BDL BDL 332 61.5 BDL 47.4 47.4 NA NA NA 8/6/2019 79 50 18 BDL 300 140 5.6 18 3.6 400 420 0.80 12 330 94 7.2 40 47.2 NA 39 BDL 8/19/2021 184 41.0 25.1 1.38 156 107 BDL BDL 28.6 177 304 BDL 16.4 61.2 25.1 8.37 19.0 27.37 164 64.5 BDL 8/25/2022 280 44.5 31.1 BDL 130 115 BDL BDL BDL 242 489 BDL 111 17.9 BDL 17.1 23.9 41.0 BDL 109 BDL 2/15/2023 397 75.4 37.3 BDL 189 148 BDL BDL BDL 262 626 BDL 183 78.7 32.5 23.1 38.6 61.7 BDL 91 BDL MW-2 9/21/2016 149 NA NA BDL 786 NA NA NA 3.09 411 NA NA 18.6 NA NA NA NA BDL NA NA NA 9/27/2017 105 37.2 20.1 BDL 294 149 1.81 BDL BDL 429 459 BDL 9.47 BDL BDL 1.45 5.89 7.34 NA NA NA 12/17/2018 60.4 36.1 18.9 BDL 277 123 BDL BDL BDL 259 464 BDL 6.6 49.4 26.7 BDL 37.1 37.1 NA NA NA 8/6/2019 74 39 16 BDL 190 120 5.6 BDL 2.8 410 360 BDL 5.6 7.2 2.4 1.5 12 13.5 NA 83 BDL 8/19/2021 140 44.6 24.0 BDL 140 107 BDL BDL BDL 227 447 BDL 7.09 1.35 BDL 1.15 3.12 4.27 155 69.7 BDL 8/25/2022 63.7 48.9 28.9 BDL 90.4 105 BDL BDL BDL 176 426 BDL 15.1 BDL BDL BDL BDL BDL BDL BDL BDL 2/15/2023 186 48.9 25.6 BDL 124 118 BDL BDL BDL 201 467 BDL 47.4 BDL BDL 5.56 10.5 16.1 BDL 69.3 BDL MW-3 9/21/2016 BDL NA NA BDL BDL NA NA NA BDL BDL NA NA BDL NA NA NA NA BDL NA NA NA 9/27/2017 142 24.5 15.8 BDL 969 140 5.14 BDL BDL 598 512 BDL 11.0 114 11.8 3.16 10.2 13.36 NA NA NA 12/17/2018 76.0 BDL 18.2 BDL 495 143 BDL BDL BDL 301 471 BDL BDL 11.7 BDL BDL BDL BDL NA NA NA 8/6/2019 110 25 10 BDL 230 90 2.2 BDL 15 360 260 BDL 6.8 6.9 1.2 3.4 5.2 8.6 NA 65 BDL 8/25/2022 28.2 BDL BDL BDL 18.5 17.6 BDL BDL BDL 65.6 67.8 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 2/15/2023 107 BDL BDL BDL 32.6 20.2 BDL BDL BDL BDL 68.7 BDL 27.7 BDL BDL BDL BDL BDL BDL 65.8 BDL Value Value ValueValueValueValueValueValueValueValueValueValueValue Exxon Shop No. 4 Parameter  Units  Value Value ValueValueValueValue Method EPA 6200 or EPA 602 Chronologic Listing of Groundwater Chemistry Lumberton, North Carolina 28358 1755 N. Roberts Avenue Value Value Table 4 Page 1 of 3 Benzene n-Butylbenzene sec-Butylbenzene Di-isopropyl ether Ethylbenzene Isopropylbenzene p-Isopropyltoluene 2-Butanone (MEK) Methyl-tert-butyl-ether Naphthalene n-Propylbenzene Styrene Toluene 1,2,4-Trimethylbenzene 1,3,5-Trimethylbenzene O-Xylene M&P-Xylenes Xylenes, Totalt-Amyl Alcoholtert-Butyl Alcoholtert-amyl Methyl Etherµg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l Sample Collect ID Date Value Value ValueValueValueValueValueValueValueValueValueValueValue Parameter  Units  Value Value ValueValueValueValue Method EPA 6200 or EPA 602 Chronologic Listing of Groundwater Chemistry Value Value MW-4 9/21/2016 BDL NA NA 2.31 BDL NA NA NA 265 BDL NA NA BDL NA NA NA NA BDL NA NA NA 9/27/2017 BDL BDL BDL 1.83 BDL BDL BDL BDL 167 BDL BDL BDL BDL BDL BDL BDL BDL BDL NA NA NA 12/17/2018 BDL BDL BDL BDL BDL BDL BDL BDL 55.3 BDL BDL BDL BDL BDL BDL BDL BDL BDL NA NA NA 8/6/2019 0.36 BDL BDL 0.92 0.31 BDL BDL BDL 100 BDL BDL BDL 0.26 0.18 BDL BDL BDL BDL NA 22 3.6 8/19/2021 BDL BDL BDL 1.20 BDL BDL BDL BDL 73.2 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 2.83 8/25/2022 BDL BDL BDL 1.07 BDL BDL BDL BDL 162 BDL BDL BDL BDL BDL BDL BDL BDL BDL 92.0 34.1 6.93 2/15/2023 BDL BDL BDL BDL BDL BDL BDL BDL 45.4 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 17.1 1.96 MW-5 9/21/2016 BDL NA NA BDL BDL NA NA NA 12.4 BDL NA NA BDL NA NA NA NA BDL NA NA NA 9/27/2017 BDL BDL BDL BDL BDL BDL BDL BDL 6.66 BDL BDL BDL BDL BDL BDL BDL BDL BDL NA NA NA 12/17/2018 BDL BDL BDL BDL BDL BDL BDL BDL 10.2 BDL BDL BDL BDL BDL BDL BDL BDL BDL NA NA NA 8/6/2019 2.7 BDL BDL 0.32 BDL 0.27 BDL BDL 42 0.55 BDL BDL BDL 0.26 0.16 0.61 0.37 0.98 3.1 3.1 3.1 8/19/2021 BDL BDL BDL BDL BDL BDL BDL BDL 26.7 BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.40 1.40 1.40 2/15/2023 BDL BDL BDL BDL BDL BDL BDL BDL 17.8 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 7.16 1.40 MW-6 9/21/2016 508 NA NA 20.0 2610 NA NA NA 931 340 NA NA 2570 NA NA NA NA 14700 NA NA NA 9/27/2017 181 2.11 2.55 8.23 707 31.1 BDL BDL 252 88.6 75.9 BDL 151 786 185 1550 2830 4380 NA NA NA 12/17/2018 215 BDL BDL BDL 676 39.4 BDL BDL 601 BDL 79.5 BDL 459 905 185 1300 2440 3740 NA NA NA 8/6/2019 320 55 18 BDL 2400 140 BDL BDL 590 1600 360 BDL 5100 2700 670 5200 8800 14000 NA BDL 260 8/19/2021 140 BDL BDL 8.60 1690 76.1 BDL BDL 508 291 226 BDL 391 2340 429 3240 5710 8950 285 BDL 167 8/25/2022 120 BDL BDL BDL 799 43.6 BDL BDL 381 162 111 BDL 157 1100 256 1810 3220 5030 BDL 103 129 2/15/2023 102 BDL BDL BDL 684 38.7 BDL BDL 364 131 108 BDL 91.7 929 222 1370 2560 3930 BDL 129 121 MW-7 12/17/2018 694 BDL BDL BDL 612 33.8 BDL BDL 684 55.5 53.1 BDL 92.6 279 42.8 602 2240 2842 NA NA NA 8/6/2019 150 5.4 2.8 BDL 120 53 1.0 BDL 95 180 110 BDL 15 180 28 120 680 800 NA BDL 7.8 8/19/2021 121 5.7 5.1 1.32 6.40 57.5 1.14 BDL 6.99 194 92.6 BDL 5.34 86.8 16.6 4.53 96.8 101 106 74.5 BDL Table 4 Page 2 of 3 Benzene n-Butylbenzene sec-Butylbenzene Di-isopropyl ether Ethylbenzene Isopropylbenzene p-Isopropyltoluene 2-Butanone (MEK) Methyl-tert-butyl-ether Naphthalene n-Propylbenzene Styrene Toluene 1,2,4-Trimethylbenzene 1,3,5-Trimethylbenzene O-Xylene M&P-Xylenes Xylenes, Totalt-Amyl Alcoholtert-Butyl Alcoholtert-amyl Methyl Etherµg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l µg/l Sample Collect ID Date Value Value ValueValueValueValueValueValueValueValueValueValueValue Parameter  Units  Value Value ValueValueValueValue Method EPA 6200 or EPA 602 Chronologic Listing of Groundwater Chemistry Value Value MW-7 8/25/2022 125 BDL BDL BDL 16.0 66.3 BDL BDL 12.7 170 102 BDL BDL 153 18.4 38.3 366 404 BDL 69.2 BDL 2/15/2023 63 BDL BDL BDL BDL 31.8 BDL BDL BDL 125 35.9 BDL BDL 77.1 BDL BDL 67.4 67.4 BDL 55.5 BDL MW-8 12/17/2018 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NA NA NA 8/6/2019 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NA BDL BDL 8/19/2021 BDL BDL BDL BDL BDL BDL BDL BDL BDL 8.94 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 8/25/2022 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 2/15/2023 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL MW-9 8/6/2019 BDL BDL BDL BDL BDL BDL BDL BDL 0.45 BDL BDL BDL BDL BDL BDL BDL BDL BDL NA BDL BDL 8/19/2021 BDL BDL BDL 1.02 BDL BDL BDL BDL 280 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 12.3 8/25/2022 17.8 BDL BDL BDL 1.62 3.15 BDL BDL 30.0 11.7 2.06 BDL BDL 12.0 1.36 2.64 46.1 48.74 143 228 1.92 2/15/2023 BDL BDL BDL BDL BDL BDL BDL BDL 14.1 BDL BDL BDL BDL BDL BDL BDL BDL BDL 91.9 200 BDL Notes:NA = Not Analyzed BDL = Below Detection Limit Values in Blue text have not changed since the previous sampling event. Values in Green have decreased since the previous sampling event. Values in Red have increased since the previous sampling event. Table 4 Page 3 of 3 Method Constituent 2L Surface GWQS Water Sample LocationUpstream At UST's Downstream Protection Volatile Organic Compounds 6200B Acetone BDL BDL BDL 2000 Acrolein BDL BDL BDL Acrylonitrile BDL BDL BDL Benzene BDL BDL BDL 1 Bromobenzene BDL BDL BDL Bromodichloromethane BDL BDL BDL Bromoform BDL BDL BDL Bromomethane BDL BDL BDL N-Butylbenzene BDL BDL BDL 70 3.9 Sec-Butylbenzene BDL BDL BDL 70 Tert-Butylbenzene BDL BDL BDL Carbon Tetrachloride BDL BDL BDL 560 Chlorobenzene BDL BDL BDL 140 Chlorodibromomethane BDL BDL BDL Chloroethane BDL BDL BDL Chloroform BDL BDL BDL Chloromethane BDL BDL BDL 2-Chlorotoluene BDL BDL BDL 4-Chlorotoluene BDL BDL BDL 1,2-Dibromo-3-Chloropropane BDL BDL BDL 1,2-Dibromoethane BDL BDL BDL Dibromomethane BDL BDL BDL 1,2-Dichlorobenzene BDL BDL BDL 470 1,3-Dichlorobenzene BDL BDL BDL 390 1,4-Dichlorobenzene BDL BDL BDL 100 Dichlorodifluoromethane BDL BDL BDL 1,1-Dichloroethane BDL BDL BDL 1,2-Dichloroethane BDL BDL BDL 1,1-Dichloroethene BDL BDL BDL Meadow Branch Exxon Shop No. 4 1755 N. Roberts Avenue Lumberton, North Carolina 28358 Listing of Surface Water Chemistry - February 15, 2023 Table 5 Page 1 of 3 Method Constituent 2L Surface GWQS Water Sample LocationUpstream At UST's Downstream Protection Meadow Branch Listing of Surface Water Chemistry - February 15, 2023 6200B Cis-1,2-Dichloroethene BDL BDL BDL Trans-1,2-Dichloroethene BDL BDL BDL 1,2-Dichloropropane BDL BDL BDL 1,1-Dichloropropene BDL BDL BDL 1,3-Dichloropropane BDL BDL BDL 2,2-Dichloropropane BDL BDL BDL Di-Isopropyl Ether BDL BDL BDL 70 Ethylbenzene BDL BDL BDL 600 97 Hexachloro-1,3-Butadiene BDL BDL BDL Isopropylbenzene BDL BDL BDL 70 250 P-Isopropyltoluene BDL BDL BDL 25 320 2-Butanone (Mek)BDL BDL BDL 26000 Methylene Chloride BDL BDL BDL 4-Methyl-2-Pentanone (Mibk)BDL BDL BDL Methyl Tert-Butyl Ether BDL BDL BDL 20 34000 Naphthalene BDL BDL BDL 6 950 N-Propylbenzene BDL BDL BDL 70 80 Styrene BDL BDL BDL 1,1,1,2-Tetrachloroethane BDL BDL BDL 1000 1,1,2,2-Tetrachloroethane BDL BDL BDL Tetrachloroethene BDL BDL BDL 0.7 120 Toluene BDL BDL BDL 600 1,2,3-Trichlorobenzene BDL BDL BDL 1,2,4-Trichlorobenzene BDL BDL BDL 1,1,1-Trichloroethane BDL BDL BDL 2500 1,1,2-Trichloroethane BDL BDL BDL 2300 Trichloroethene BDL BDL BDL Trichlorofluoromethane BDL BDL BDL 1,2,3-Trichloropropane BDL BDL BDL 1,2,4-Trimethylbenzene BDL BDL BDL 400 390 1,3,5-Trimethylbenzene BDL BDL BDL 400 630 Vinyl Chloride BDL BDL BDL 0.03 O-Xylene BDL BDL BDL Table 5 Page 2 of 3 Method Constituent 2L Surface GWQS Water Sample LocationUpstream At UST's Downstream Protection Meadow Branch Listing of Surface Water Chemistry - February 15, 2023 6200B M&P-Xylene BDL BDL BDL Total Xylenes BDL BDL BDL 500 6200 Ethanol BDL BDL BDL Ethyl Tert-Butyl Ether BDL BDL BDL T-Amyl Alcohol BDL BDL BDL 40 Tert-Butyl Alcohol BDL BDL BDL 10 Tert-Amyl Methyl Ether BDL BDL BDL 128 Notes:BDL = Below Detection Limit NA = Constituent Not Analyzed Results are presented in ug/l. Values in Green are above the detection limit, but below the 2L and/or 2B Standard. Values in Red Bold exceed the 2L Class GA groundwater quality standard or the 2B Human Health standard. Table 5 Page 3 of 3 Exxon Shop No. 4 Monitoring Report HEA Project No. 17-1008 April 20, 2023 Figures Figure 1: Topographic Map – 2019 USGS Figure 2: Vicinity Map Figure 3: Site Map with Monitoring Well Locations Figure 4: Approximate Distribution of Benzene in Groundwater Figure 5: Approximate Distribution of Ethylbenzene in Groundwater Figure 6: Approximate Distribution of MTBE in Groundwater Figure 7: Approximate Distribution of Naphthalene in Groundwater Figure 8: Approximate Distribution of Total Xylenes in Groundwater FIGURE NO.:1RED SPRINGS FUEL OIL COMPANY, INC. - EXXON SHOP NO. 4 - 2016 USGS LUMBERTON NE, NW, SE & SW QUADSSCALE: 1" = 2000' SITE ROBESON COUNTY 2021 DIGITAL AERIAL PHOTOGRAPHY APRIL 20, 2023 AS SHOWN 17-1008 17100802 FIGURE NO.: JOB: FILE: DATE: SCALE: 2 VICINITY MAP - LUMBERTON, NORTH CAROLINA 28358 1755 N. ROBERTS AVENUE, HIGHWAY 211 EXXON SHOP NO. 4 RED SPRINGS FUEL OIL COMPANYHAGGETT ENGINEERING ASSOCIATES, INC. 5307 SOUTH COLLEGE ROAD, SUITE 2B WILMINGTON, NORTH CAROLINA 28412 PHONE: (910) 397-0808 REFERENCES: D. HAGGETT LICENSE NO.: C-1111 5002501250 GRAPHIC SCALE 1 inch = 250 feet 250 DFT CHECK: ENG CHECK: APPROVAL: DRAWN: SFH DNH LEGEND PROPERTY BOUNDARY 1000' RADIUS ELIZABETHT O WN RO AD - NC H WY 41 R O B E R T S A V E N U E - N C H W Y 2 1 1 SITE MEADOW BRANCH ROBESON COUNTY 2021 DIGITAL AERIAL PHOTOGRAPHY APRIL 20, 2023 AS SHOWN 17-1008 17100803 FIGURE NO.: JOB: FILE: DATE: SCALE: 3 SITE MAP WITH MONITORING WELLS - LUMBERTON, NORTH CAROLINA 28358 1755 N. ROBERTS AVENUE, HIGHWAY 211 EXXON SHOP NO. 4 RED SPRINGS FUEL OIL COMPANYHAGGETT ENGINEERING ASSOCIATES, INC. 5307 SOUTH COLLEGE ROAD, SUITE 2B WILMINGTON, NORTH CAROLINA 28412 PHONE: (910) 397-0808 REFERENCES: D. HAGGETT LICENSE NO.: C-1111 10050250 GRAPHIC SCALE 1 inch = 50 feet 50 DFT CHECK: ENG CHECK: APPROVAL: DRAWN: SFH DNH LEGEND PROPERTY BOUNDARY MONITORING WELLMW-1 UST BASIN ROBERTS AVENUE - NC HWY 211CANOPY C-STORE CARWASH ELIZABETHTOWN ROAD - NC HWY 41 MW-2 MW-1 MW-3 MW-4 MW-5 MW-6 MEADOW BRANCHCLASS C;SW MW-8 MW-7 125.42 124.12 125.20 127.15 126.61 127.31 127.14 125.39 FL O W MW-9125.26 SOIL BORING - MWMW-1 MW-10 ROBESON COUNTY 2021 DIGITAL AERIAL PHOTOGRAPHY APRIL 20, 2023 AS SHOWN 17-1008 17100804 FIGURE NO.: JOB: FILE: DATE: SCALE: 4 IN GROUNDWATER APPROXIMATE DISTRIBUTION OF BENZENE LUMBERTON, NORTH CAROLINA 28358 1755 N. ROBERTS AVENUE, HIGHWAY 211 EXXON SHOP NO. 4 RED SPRINGS FUEL OIL COMPANYHAGGETT ENGINEERING ASSOCIATES, INC. 5307 SOUTH COLLEGE ROAD, SUITE 2B WILMINGTON, NORTH CAROLINA 28412 PHONE: (910) 397-0808 REFERENCES: D. HAGGETT LICENSE NO.: C-1111 10050250 GRAPHIC SCALE 1 inch = 50 feet 50 DFT CHECK: ENG CHECK: APPROVAL: DRAWN: SFH DNH LEGEND PROPERTY BOUNDARY MONITORING WELLMW 1 UST BASIN ROBERTS AVENUE - NC HWY 211CANOPY C-STORE CARWASH ELIZABETHTOWN ROAD - NC HWY 41 MW-2 MW-1 MW-3 MW-4 MW-5 MW-6 MEADOW BRANCHCLASS C;SW MW-8 MW-7 BDL BDL 102 397 63 186 107 BDL MW-9BDL 1 50 100 50 1 200 SOIL BORING - MWMW-1 MW-10 300 ROBESON COUNTY 2021 DIGITAL AERIAL PHOTOGRAPHY APRIL 15, 2023 AS SHOWN 17-1008 17100805 FIGURE NO.: JOB: FILE: DATE: SCALE: 5 IN GROUNDWATER APPROXIMATE DISTRIBUTION OF ETHYLBENZENE LUMBERTON, NORTH CAROLINA 28358 1755 N. ROBERTS AVENUE, HIGHWAY 211 EXXON SHOP NO. 4 RED SPRINGS FUEL OIL COMPANYHAGGETT ENGINEERING ASSOCIATES, INC. 5307 SOUTH COLLEGE ROAD, SUITE 2B WILMINGTON, NORTH CAROLINA 28412 PHONE: (910) 397-0808 REFERENCES: D. HAGGETT LICENSE NO.: C-1111 10050250 GRAPHIC SCALE 1 inch = 50 feet 50 DFT CHECK: ENG CHECK: APPROVAL: DRAWN: SFH DNH LEGEND PROPERTY BOUNDARY MONITORING WELLMW 1 UST BASIN ROBERTS AVENUE - NC HWY 211CANOPY C-STORE CARWASH ELIZABETHTOWN ROAD - NC HWY 41 MW-2 MW-1 MW-3 MW-4 MW-5 MW-6 MEADOW BRANCHCLASS C;SW MW-8 MW-7 BDL BDL 684 189 BDL 124 32.6 BDL MW-9BDL 600 SOIL BORING - MWMW-1 MW-10 ROBESON COUNTY 2021 DIGITAL AERIAL PHOTOGRAPHY APRIL 20, 2023 AS SHOWN 17-1008 17100806 FIGURE NO.: JOB: FILE: DATE: SCALE: 6 IN GROUNDWATER APPROXIMATE DISTRIBUTION OF MTBE LUMBERTON, NORTH CAROLINA 28358 1755 N. ROBERTS AVENUE, HIGHWAY 211 EXXON SHOP NO. 4 RED SPRINGS FUEL OIL COMPANYHAGGETT ENGINEERING ASSOCIATES, INC. 5307 SOUTH COLLEGE ROAD, SUITE 2B WILMINGTON, NORTH CAROLINA 28412 PHONE: (910) 397-0808 REFERENCES: D. HAGGETT LICENSE NO.: C-1111 10050250 GRAPHIC SCALE 1 inch = 50 feet 50 DFT CHECK: ENG CHECK: APPROVAL: DRAWN: SFH DNH LEGEND PROPERTY BOUNDARY MONITORING WELLMW 1 UST BASIN ROBERTS AVENUE - NC HWY 211CANOPY C-STORE CARWASH ELIZABETHTOWN ROAD - NC HWY 41 MW-2 MW-1 MW-3 MW-4 MW-5 MW-6 MEADOW BRANCHCLASS C;SW MW-8 MW-7 BDL NS 364 BDL BDL BDL BDL 45.4 MW-914.9 300 200 100 SOIL BORING - MWMW-1 MW-10 20 ROBESON COUNTY 2021 DIGITAL AERIAL PHOTOGRAPHY APRIL 20, 2023 AS SHOWN 17-1008 17100807 FIGURE NO.: JOB: FILE: DATE: SCALE: 7 IN GROUNDWATER APPROXIMATE DISTRIBUTION OF NAPHTHALENE LUMBERTON, NORTH CAROLINA 28358 1755 N. ROBERTS AVENUE, HIGHWAY 211 EXXON SHOP NO. 4 RED SPRINGS FUEL OIL COMPANYHAGGETT ENGINEERING ASSOCIATES, INC. 5307 SOUTH COLLEGE ROAD, SUITE 2B WILMINGTON, NORTH CAROLINA 28412 PHONE: (910) 397-0808 REFERENCES: D. HAGGETT LICENSE NO.: C-1111 10050250 GRAPHIC SCALE 1 inch = 50 feet 50 DFT CHECK: ENG CHECK: APPROVAL: DRAWN: SFH DNH LEGEND PROPERTY BOUNDARY MONITORING WELLMW 1 UST BASIN ROBERTS AVENUE - NC HWY 211CANOPY C-STORE CARWASH ELIZABETHTOWN ROAD - NC HWY 41 MW-2 MW-1 MW-3 MW-4 MW-5 MW-6 MEADOW BRANCHCLASS C;SW MW-8 MW-7 BDL BDL 131 262 125 201 BDL BDL MW-9BDL 200 100 60 100 6 60 SOIL BORING - MWMW-1 MW-10 6 ROBESON COUNTY 2021 DIGITAL AERIAL PHOTOGRAPHY APRIL 20, 2023 AS SHOWN 17-1008 17100808 FIGURE NO.: JOB: FILE: DATE: SCALE: 8 IN GROUNDWATER APPROXIMATE DISTRIBUTION OF TOTAL XYLENES LUMBERTON, NORTH CAROLINA 28358 1755 N. ROBERTS AVENUE, HIGHWAY 211 EXXON SHOP NO. 4 RED SPRINGS FUEL OIL COMPANYHAGGETT ENGINEERING ASSOCIATES, INC. 5307 SOUTH COLLEGE ROAD, SUITE 2B WILMINGTON, NORTH CAROLINA 28412 PHONE: (910) 397-0808 REFERENCES: D. HAGGETT LICENSE NO.: C-1111 10050250 GRAPHIC SCALE 1 inch = 50 feet 50 DFT CHECK: ENG CHECK: APPROVAL: DRAWN: SFH DNH LEGEND PROPERTY BOUNDARY MONITORING WELLMW 1 UST BASIN ROBERTS AVENUE - NC HWY 211CANOPY C-STORE CARWASH ELIZABETHTOWN ROAD - NC HWY 41 MW-2 MW-1 MW-3 MW-4 MW-5 MW-6 MEADOW BRANCHCLASS C;SW MW-8 MW-7 BDL BDL 3930 61.7 67.4 16.1 BDL BDL MW-9BDL 3000 2000 1000 500 SOIL BORING - MWMW-1 MW-10 Exxon Shop No. 4 Monitoring Report HEA Project No. 17-1008 April 20, 2023 Appendices Appendix A: Laboratory Analytical Report with Chain of Custody Exxon Shop No. 4 Monitoring Report HEA Project No. 17-1008 April 20, 2023 Appendix “A” Laboratory Analytical Report with Chain of Custody ANALYTICAL REPORT February 23, 2023 EHC, Inc. Sample Delivery Group:L1586583 Samples Received:02/16/2023 Project Number:ZK-0420 Description:Exxon Shop 4 Site:LUMBERTON, NC Report To:Mr. Thomas Ammons PO Box 902 Red Springs, NC 28377 Entire Report Reviewed By: February 23, 2023 [Preliminary Report] Heather J Wagner Project Manager Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided, and as the samples are received. Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 www.pacenational.com 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 1 of 48 February 23, 2023 Heather J Wagner Project Manager ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 1 of 48 TABLE OF CONTENTS Cp: Cover Page 1 Tc: Table of Contents 2 Ss: Sample Summary 3 Cn: Case Narrative 5 Sr: Sample Results 6 MW-1 L1586583-01 6 MW-2 L1586583-02 8 MW-3 L1586583-03 10 MW-4 L1586583-04 12 MW-5 L1586583-05 14 MW-6 L1586583-06 16 MW-7 L1586583-07 18 MW-8 L1586583-08 20 MW-9 L1586583-09 22 UPGRADIENT L1586583-10 24 AT TANK SITE L1586583-11 26 DOWNGRADIENT L1586583-12 28 Qc: Quality Control Summary 30 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 30 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 42 Gl: Glossary of Terms 44 Al: Accreditations & Locations 45 Sc: Sample Chain of Custody 46 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 2 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 2 of 48 SAMPLE SUMMARY Collected by Collected date/time Received date/time MW-1 L1586583-01 GW Aric Clark 02/15/23 00:00 02/16/23 09:45 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 WG2008116 10 02/17/23 21:14 02/17/23 21:14 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2011272 10 02/23/23 01:49 02/23/23 01:49 KSD Mt. Juliet, TN Collected by Collected date/time Received date/time MW-2 L1586583-02 GW Aric Clark 02/15/23 00:00 02/16/23 09:45 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 WG2008116 5 02/17/23 21:35 02/17/23 21:35 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2011272 5 02/23/23 02:11 02/23/23 02:11 KSD Mt. Juliet, TN Collected by Collected date/time Received date/time MW-3 L1586583-03 GW Aric Clark 02/15/23 00:00 02/16/23 09:45 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 WG2008116 10 02/17/23 21:55 02/17/23 21:55 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2011272 10 02/23/23 02:33 02/23/23 02:33 KSD Mt. Juliet, TN Collected by Collected date/time Received date/time MW-4 L1586583-04 GW Aric Clark 02/15/23 00:00 02/16/23 09:45 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 WG2008116 1 02/17/23 18:50 02/17/23 18:50 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2011272 1 02/23/23 00:21 02/23/23 00:21 KSD Mt. Juliet, TN Collected by Collected date/time Received date/time MW-5 L1586583-05 GW Aric Clark 02/15/23 00:00 02/16/23 09:45 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 WG2008116 1 02/17/23 19:10 02/17/23 19:10 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2011272 1 02/23/23 00:44 02/23/23 00:44 KSD Mt. Juliet, TN Collected by Collected date/time Received date/time MW-6 L1586583-06 GW Aric Clark 02/15/23 00:00 02/16/23 09:45 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 WG2008116 20 02/17/23 22:15 02/17/23 22:15 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2011272 20 02/23/23 02:55 02/23/23 02:55 KSD Mt. Juliet, TN Collected by Collected date/time Received date/time MW-7 L1586583-07 GW Aric Clark 02/15/23 00:00 02/16/23 09:45 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 WG2008116 10 02/17/23 22:36 02/17/23 22:36 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2011272 10 02/23/23 03:17 02/23/23 03:17 KSD Mt. Juliet, TN 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 3 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 3 of 48 SAMPLE SUMMARY Collected by Collected date/time Received date/time MW-8 L1586583-08 GW Aric Clark 02/15/23 00:00 02/16/23 09:45 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 WG2008116 1 02/17/23 19:31 02/17/23 19:31 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2011272 1 02/23/23 01:06 02/23/23 01:06 KSD Mt. Juliet, TN Collected by Collected date/time Received date/time MW-9 L1586583-09 GW Aric Clark 02/15/23 00:00 02/16/23 09:45 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 WG2008116 1 02/17/23 19:52 02/17/23 19:52 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2011272 1 02/23/23 01:27 02/23/23 01:27 KSD Mt. Juliet, TN Collected by Collected date/time Received date/time UPGRADIENT L1586583-10 GW Aric Clark 02/15/23 00:00 02/16/23 09:45 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 WG2011532 1 02/23/23 14:41 02/23/23 14:41 JBE Mt. Juliet, TN Collected by Collected date/time Received date/time AT TANK SITE L1586583-11 GW Aric Clark 02/15/23 00:00 02/16/23 09:45 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 WG2011291 1 02/23/23 07:43 02/23/23 07:43 KSD Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2011484 1 02/23/23 11:56 02/23/23 11:56 JBE Mt. Juliet, TN Collected by Collected date/time Received date/time DOWNGRADIENT L1586583-12 GW Aric Clark 02/15/23 00:00 02/16/23 09:45 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 WG2011291 1 02/23/23 08:03 02/23/23 08:03 KSD Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2011484 1 02/23/23 12:17 02/23/23 12:17 JBE Mt. Juliet, TN 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 4 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 4 of 48 CASE NARRATIVE All sample aliquots were received at the correct temperature, in the proper containers, with the appropriate preservatives, and within method specified holding times, unless qualified or notated within the report. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples have been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control are within established criteria except where addressed in this case narrative, a non-conformance form or properly qualified within the sample results. By my digital signature below, I affirm to the best of my knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the quality of the data have been identified by the laboratory, and no information or data have been knowingly withheld that would affect the quality of the data. [Preliminary Report] Heather J Wagner Project Manager 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 5 of 48 Heather J Wagner Project Manager ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 5 of 48 SAMPLE RESULTS - 01 L1586583 MW-1 Collected date/time: 02/15/23 00:00 Additional Information - Results for field analyses are not accredited to ISO 17025 Result Units Analyte pH (On Site)6.43 su Temperature (on-site)18.9 Deg C Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Acetone ND 500 10 02/17/2023 21:14 WG2008116 Acrolein ND 500 10 02/17/2023 21:14 WG2008116 Acrylonitrile ND 100 10 02/17/2023 21:14 WG2008116 Benzene 397 10.0 10 02/17/2023 21:14 WG2008116 Bromobenzene ND 10.0 10 02/17/2023 21:14 WG2008116 Bromodichloromethane ND 10.0 10 02/17/2023 21:14 WG2008116 Bromoform ND 10.0 10 02/17/2023 21:14 WG2008116 Bromomethane ND 50.0 10 02/17/2023 21:14 WG2008116 n-Butylbenzene 75.4 10.0 10 02/17/2023 21:14 WG2008116 sec-Butylbenzene 37.3 10.0 10 02/17/2023 21:14 WG2008116 tert-Butylbenzene ND 10.0 10 02/17/2023 21:14 WG2008116 Carbon tetrachloride ND 10.0 10 02/17/2023 21:14 WG2008116 Chlorobenzene ND 10.0 10 02/17/2023 21:14 WG2008116 Chlorodibromomethane ND 10.0 10 02/17/2023 21:14 WG2008116 Chloroethane ND 50.0 10 02/17/2023 21:14 WG2008116 Chloroform ND 50.0 10 02/17/2023 21:14 WG2008116 Chloromethane ND 25.0 10 02/17/2023 21:14 WG2008116 2-Chlorotoluene ND 10.0 10 02/17/2023 21:14 WG2008116 4-Chlorotoluene ND 10.0 10 02/17/2023 21:14 WG2008116 1,2-Dibromo-3-Chloropropane ND 50.0 10 02/17/2023 21:14 WG2008116 1,2-Dibromoethane ND 10.0 10 02/17/2023 21:14 WG2008116 Dibromomethane ND 10.0 10 02/17/2023 21:14 WG2008116 1,2-Dichlorobenzene ND 10.0 10 02/17/2023 21:14 WG2008116 1,3-Dichlorobenzene ND 10.0 10 02/17/2023 21:14 WG2008116 1,4-Dichlorobenzene ND 10.0 10 02/17/2023 21:14 WG2008116 Dichlorodifluoromethane ND 50.0 10 02/17/2023 21:14 WG2008116 1,1-Dichloroethane ND 10.0 10 02/17/2023 21:14 WG2008116 1,2-Dichloroethane ND 10.0 10 02/17/2023 21:14 WG2008116 1,1-Dichloroethene ND 10.0 10 02/17/2023 21:14 WG2008116 cis-1,2-Dichloroethene ND 10.0 10 02/17/2023 21:14 WG2008116 trans-1,2-Dichloroethene ND 10.0 10 02/17/2023 21:14 WG2008116 1,2-Dichloropropane ND 10.0 10 02/17/2023 21:14 WG2008116 1,1-Dichloropropene ND 10.0 10 02/17/2023 21:14 WG2008116 1,3-Dichloropropane ND 10.0 10 02/17/2023 21:14 WG2008116 2,2-Dichloropropane ND 10.0 10 02/17/2023 21:14 WG2008116 Di-isopropyl ether ND 10.0 10 02/17/2023 21:14 WG2008116 Ethylbenzene 189 10.0 10 02/17/2023 21:14 WG2008116 Hexachloro-1,3-butadiene ND 10.0 10 02/17/2023 21:14 WG2008116 Isopropylbenzene 148 10.0 10 02/17/2023 21:14 WG2008116 p-Isopropyltoluene ND 10.0 10 02/17/2023 21:14 WG2008116 2-Butanone (MEK)ND 100 10 02/17/2023 21:14 WG2008116 Methylene Chloride ND 50.0 10 02/17/2023 21:14 WG2008116 4-Methyl-2-pentanone (MIBK) ND 100 10 02/17/2023 21:14 WG2008116 Methyl tert-butyl ether ND 10.0 10 02/17/2023 21:14 WG2008116 Naphthalene 262 50.0 10 02/17/2023 21:14 WG2008116 n-Propylbenzene 626 10.0 10 02/17/2023 21:14 WG2008116 Styrene ND 10.0 10 02/17/2023 21:14 WG2008116 1,1,1,2-Tetrachloroethane ND 10.0 10 02/17/2023 21:14 WG2008116 1,1,2,2-Tetrachloroethane ND 10.0 10 02/17/2023 21:14 WG2008116 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 6 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 6 of 48 SAMPLE RESULTS - 01 L1586583 MW-1 Collected date/time: 02/15/23 00:00 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Tetrachloroethene ND 10.0 10 02/17/2023 21:14 WG2008116 Toluene 183 10.0 10 02/17/2023 21:14 WG2008116 1,2,3-Trichlorobenzene ND 10.0 10 02/17/2023 21:14 WG2008116 1,2,4-Trichlorobenzene ND 10.0 10 02/17/2023 21:14 WG2008116 1,1,1-Trichloroethane ND 10.0 10 02/17/2023 21:14 WG2008116 1,1,2-Trichloroethane ND 10.0 10 02/17/2023 21:14 WG2008116 Trichloroethene ND 10.0 10 02/17/2023 21:14 WG2008116 Trichlorofluoromethane ND 50.0 10 02/17/2023 21:14 WG2008116 1,2,3-Trichloropropane ND 25.0 10 02/17/2023 21:14 WG2008116 1,2,4-Trimethylbenzene 78.7 10.0 10 02/17/2023 21:14 WG2008116 1,3,5-Trimethylbenzene 32.5 10.0 10 02/17/2023 21:14 WG2008116 Vinyl chloride ND 10.0 10 02/17/2023 21:14 WG2008116 o-Xylene 23.1 10.0 10 02/17/2023 21:14 WG2008116 m&p-Xylenes 38.6 20.0 10 02/17/2023 21:14 WG2008116 Ethanol ND 1000 10 02/23/2023 01:49 WG2011272 Ethyl tert-butyl ether ND 10.0 10 02/17/2023 21:14 WG2008116 t-Amyl Alcohol ND 500 10 02/17/2023 21:14 WG2008116 tert-Butyl alcohol 91.0 50.0 10 02/17/2023 21:14 WG2008116 tert-Amyl Methyl Ether ND 10.0 10 02/17/2023 21:14 WG2008116 (S) Toluene-d8 101 80.0-120 02/17/2023 21:14 WG2008116 (S) Toluene-d8 102 80.0-120 02/23/2023 01:49 WG2011272 (S) 4-Bromofluorobenzene 94.6 77.0-126 02/17/2023 21:14 WG2008116 (S) 4-Bromofluorobenzene 87.1 77.0-126 02/23/2023 01:49 WG2011272 (S) 1,2-Dichloroethane-d4 108 70.0-130 02/17/2023 21:14 WG2008116 (S) 1,2-Dichloroethane-d4 93.6 70.0-130 02/23/2023 01:49 WG2011272 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 7 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 7 of 48 SAMPLE RESULTS - 02 L1586583 MW-2 Collected date/time: 02/15/23 00:00 Additional Information - Results for field analyses are not accredited to ISO 17025 Result Units Analyte pH (On Site)6.51 su Temperature (on-site)19.6 Deg C Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Acetone ND 250 5 02/17/2023 21:35 WG2008116 Acrolein ND 250 5 02/17/2023 21:35 WG2008116 Acrylonitrile ND 50.0 5 02/17/2023 21:35 WG2008116 Benzene 186 5.00 5 02/17/2023 21:35 WG2008116 Bromobenzene ND 5.00 5 02/17/2023 21:35 WG2008116 Bromodichloromethane ND 5.00 5 02/17/2023 21:35 WG2008116 Bromoform ND 5.00 5 02/17/2023 21:35 WG2008116 Bromomethane ND 25.0 5 02/17/2023 21:35 WG2008116 n-Butylbenzene 48.9 5.00 5 02/17/2023 21:35 WG2008116 sec-Butylbenzene 25.6 5.00 5 02/17/2023 21:35 WG2008116 tert-Butylbenzene ND 5.00 5 02/17/2023 21:35 WG2008116 Carbon tetrachloride ND 5.00 5 02/17/2023 21:35 WG2008116 Chlorobenzene ND 5.00 5 02/17/2023 21:35 WG2008116 Chlorodibromomethane ND 5.00 5 02/17/2023 21:35 WG2008116 Chloroethane ND 25.0 5 02/17/2023 21:35 WG2008116 Chloroform ND 25.0 5 02/17/2023 21:35 WG2008116 Chloromethane ND 12.5 5 02/17/2023 21:35 WG2008116 2-Chlorotoluene ND 5.00 5 02/17/2023 21:35 WG2008116 4-Chlorotoluene ND 5.00 5 02/17/2023 21:35 WG2008116 1,2-Dibromo-3-Chloropropane ND 25.0 5 02/17/2023 21:35 WG2008116 1,2-Dibromoethane ND 5.00 5 02/17/2023 21:35 WG2008116 Dibromomethane ND 5.00 5 02/17/2023 21:35 WG2008116 1,2-Dichlorobenzene ND 5.00 5 02/17/2023 21:35 WG2008116 1,3-Dichlorobenzene ND 5.00 5 02/17/2023 21:35 WG2008116 1,4-Dichlorobenzene ND 5.00 5 02/17/2023 21:35 WG2008116 Dichlorodifluoromethane ND 25.0 5 02/17/2023 21:35 WG2008116 1,1-Dichloroethane ND 5.00 5 02/17/2023 21:35 WG2008116 1,2-Dichloroethane ND 5.00 5 02/17/2023 21:35 WG2008116 1,1-Dichloroethene ND 5.00 5 02/17/2023 21:35 WG2008116 cis-1,2-Dichloroethene ND 5.00 5 02/17/2023 21:35 WG2008116 trans-1,2-Dichloroethene ND 5.00 5 02/17/2023 21:35 WG2008116 1,2-Dichloropropane ND 5.00 5 02/17/2023 21:35 WG2008116 1,1-Dichloropropene ND 5.00 5 02/17/2023 21:35 WG2008116 1,3-Dichloropropane ND 5.00 5 02/17/2023 21:35 WG2008116 2,2-Dichloropropane ND 5.00 5 02/17/2023 21:35 WG2008116 Di-isopropyl ether ND 5.00 5 02/17/2023 21:35 WG2008116 Ethylbenzene 124 5.00 5 02/17/2023 21:35 WG2008116 Hexachloro-1,3-butadiene ND 5.00 5 02/17/2023 21:35 WG2008116 Isopropylbenzene 118 5.00 5 02/17/2023 21:35 WG2008116 p-Isopropyltoluene ND 5.00 5 02/17/2023 21:35 WG2008116 2-Butanone (MEK)ND 50.0 5 02/17/2023 21:35 WG2008116 Methylene Chloride ND 25.0 5 02/17/2023 21:35 WG2008116 4-Methyl-2-pentanone (MIBK) ND 50.0 5 02/17/2023 21:35 WG2008116 Methyl tert-butyl ether ND 5.00 5 02/17/2023 21:35 WG2008116 Naphthalene 201 25.0 5 02/17/2023 21:35 WG2008116 n-Propylbenzene 467 5.00 5 02/17/2023 21:35 WG2008116 Styrene ND 5.00 5 02/17/2023 21:35 WG2008116 1,1,1,2-Tetrachloroethane ND 5.00 5 02/17/2023 21:35 WG2008116 1,1,2,2-Tetrachloroethane ND 5.00 5 02/17/2023 21:35 WG2008116 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 8 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 8 of 48 SAMPLE RESULTS - 02 L1586583 MW-2 Collected date/time: 02/15/23 00:00 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Tetrachloroethene ND 5.00 5 02/17/2023 21:35 WG2008116 Toluene 47.4 5.00 5 02/17/2023 21:35 WG2008116 1,2,3-Trichlorobenzene ND 5.00 5 02/17/2023 21:35 WG2008116 1,2,4-Trichlorobenzene ND 5.00 5 02/17/2023 21:35 WG2008116 1,1,1-Trichloroethane ND 5.00 5 02/17/2023 21:35 WG2008116 1,1,2-Trichloroethane ND 5.00 5 02/17/2023 21:35 WG2008116 Trichloroethene ND 5.00 5 02/17/2023 21:35 WG2008116 Trichlorofluoromethane ND 25.0 5 02/17/2023 21:35 WG2008116 1,2,3-Trichloropropane ND 12.5 5 02/17/2023 21:35 WG2008116 1,2,4-Trimethylbenzene ND 5.00 5 02/17/2023 21:35 WG2008116 1,3,5-Trimethylbenzene ND 5.00 5 02/17/2023 21:35 WG2008116 Vinyl chloride ND 5.00 5 02/17/2023 21:35 WG2008116 o-Xylene 5.56 5.00 5 02/17/2023 21:35 WG2008116 m&p-Xylenes 10.5 10.0 5 02/17/2023 21:35 WG2008116 Ethanol ND 500 5 02/23/2023 02:11 WG2011272 Ethyl tert-butyl ether ND 5.00 5 02/17/2023 21:35 WG2008116 t-Amyl Alcohol ND 250 5 02/17/2023 21:35 WG2008116 tert-Butyl alcohol 69.3 25.0 5 02/17/2023 21:35 WG2008116 tert-Amyl Methyl Ether ND 5.00 5 02/17/2023 21:35 WG2008116 (S) Toluene-d8 101 80.0-120 02/17/2023 21:35 WG2008116 (S) Toluene-d8 104 80.0-120 02/23/2023 02:11 WG2011272 (S) 4-Bromofluorobenzene 94.3 77.0-126 02/17/2023 21:35 WG2008116 (S) 4-Bromofluorobenzene 93.4 77.0-126 02/23/2023 02:11 WG2011272 (S) 1,2-Dichloroethane-d4 107 70.0-130 02/17/2023 21:35 WG2008116 (S) 1,2-Dichloroethane-d4 91.3 70.0-130 02/23/2023 02:11 WG2011272 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 9 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 9 of 48 SAMPLE RESULTS - 03 L1586583 MW-3 Collected date/time: 02/15/23 00:00 Additional Information - Results for field analyses are not accredited to ISO 17025 Result Units Analyte pH (On Site)6.73 su Temperature (on-site)18.5 Deg C Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Acetone ND 500 10 02/17/2023 21:55 WG2008116 Acrolein ND 500 10 02/17/2023 21:55 WG2008116 Acrylonitrile ND 100 10 02/17/2023 21:55 WG2008116 Benzene 107 10.0 10 02/17/2023 21:55 WG2008116 Bromobenzene ND 10.0 10 02/17/2023 21:55 WG2008116 Bromodichloromethane ND 10.0 10 02/17/2023 21:55 WG2008116 Bromoform ND 10.0 10 02/17/2023 21:55 WG2008116 Bromomethane ND 50.0 10 02/17/2023 21:55 WG2008116 n-Butylbenzene ND 10.0 10 02/17/2023 21:55 WG2008116 sec-Butylbenzene ND 10.0 10 02/17/2023 21:55 WG2008116 tert-Butylbenzene ND 10.0 10 02/17/2023 21:55 WG2008116 Carbon tetrachloride ND 10.0 10 02/17/2023 21:55 WG2008116 Chlorobenzene ND 10.0 10 02/17/2023 21:55 WG2008116 Chlorodibromomethane ND 10.0 10 02/17/2023 21:55 WG2008116 Chloroethane ND 50.0 10 02/17/2023 21:55 WG2008116 Chloroform ND 50.0 10 02/17/2023 21:55 WG2008116 Chloromethane ND 25.0 10 02/17/2023 21:55 WG2008116 2-Chlorotoluene ND 10.0 10 02/17/2023 21:55 WG2008116 4-Chlorotoluene ND 10.0 10 02/17/2023 21:55 WG2008116 1,2-Dibromo-3-Chloropropane ND 50.0 10 02/17/2023 21:55 WG2008116 1,2-Dibromoethane ND 10.0 10 02/17/2023 21:55 WG2008116 Dibromomethane ND 10.0 10 02/17/2023 21:55 WG2008116 1,2-Dichlorobenzene ND 10.0 10 02/17/2023 21:55 WG2008116 1,3-Dichlorobenzene ND 10.0 10 02/17/2023 21:55 WG2008116 1,4-Dichlorobenzene ND 10.0 10 02/17/2023 21:55 WG2008116 Dichlorodifluoromethane ND 50.0 10 02/17/2023 21:55 WG2008116 1,1-Dichloroethane ND 10.0 10 02/17/2023 21:55 WG2008116 1,2-Dichloroethane ND 10.0 10 02/17/2023 21:55 WG2008116 1,1-Dichloroethene ND 10.0 10 02/17/2023 21:55 WG2008116 cis-1,2-Dichloroethene ND 10.0 10 02/17/2023 21:55 WG2008116 trans-1,2-Dichloroethene ND 10.0 10 02/17/2023 21:55 WG2008116 1,2-Dichloropropane ND 10.0 10 02/17/2023 21:55 WG2008116 1,1-Dichloropropene ND 10.0 10 02/17/2023 21:55 WG2008116 1,3-Dichloropropane ND 10.0 10 02/17/2023 21:55 WG2008116 2,2-Dichloropropane ND 10.0 10 02/17/2023 21:55 WG2008116 Di-isopropyl ether ND 10.0 10 02/17/2023 21:55 WG2008116 Ethylbenzene 32.6 10.0 10 02/17/2023 21:55 WG2008116 Hexachloro-1,3-butadiene ND 10.0 10 02/17/2023 21:55 WG2008116 Isopropylbenzene 20.2 10.0 10 02/17/2023 21:55 WG2008116 p-Isopropyltoluene ND 10.0 10 02/17/2023 21:55 WG2008116 2-Butanone (MEK)ND 100 10 02/17/2023 21:55 WG2008116 Methylene Chloride ND 50.0 10 02/17/2023 21:55 WG2008116 4-Methyl-2-pentanone (MIBK) ND 100 10 02/17/2023 21:55 WG2008116 Methyl tert-butyl ether ND 10.0 10 02/17/2023 21:55 WG2008116 Naphthalene ND 50.0 10 02/17/2023 21:55 WG2008116 n-Propylbenzene 68.7 10.0 10 02/17/2023 21:55 WG2008116 Styrene ND 10.0 10 02/17/2023 21:55 WG2008116 1,1,1,2-Tetrachloroethane ND 10.0 10 02/17/2023 21:55 WG2008116 1,1,2,2-Tetrachloroethane ND 10.0 10 02/17/2023 21:55 WG2008116 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 10 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 10 of 48 SAMPLE RESULTS - 03 L1586583 MW-3 Collected date/time: 02/15/23 00:00 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Tetrachloroethene ND 10.0 10 02/17/2023 21:55 WG2008116 Toluene 27.7 10.0 10 02/17/2023 21:55 WG2008116 1,2,3-Trichlorobenzene ND 10.0 10 02/17/2023 21:55 WG2008116 1,2,4-Trichlorobenzene ND 10.0 10 02/17/2023 21:55 WG2008116 1,1,1-Trichloroethane ND 10.0 10 02/17/2023 21:55 WG2008116 1,1,2-Trichloroethane ND 10.0 10 02/17/2023 21:55 WG2008116 Trichloroethene ND 10.0 10 02/17/2023 21:55 WG2008116 Trichlorofluoromethane ND 50.0 10 02/17/2023 21:55 WG2008116 1,2,3-Trichloropropane ND 25.0 10 02/17/2023 21:55 WG2008116 1,2,4-Trimethylbenzene ND 10.0 10 02/17/2023 21:55 WG2008116 1,3,5-Trimethylbenzene ND 10.0 10 02/17/2023 21:55 WG2008116 Vinyl chloride ND 10.0 10 02/17/2023 21:55 WG2008116 o-Xylene ND 10.0 10 02/17/2023 21:55 WG2008116 m&p-Xylenes ND 20.0 10 02/17/2023 21:55 WG2008116 Ethanol ND 1000 10 02/23/2023 02:33 WG2011272 Ethyl tert-butyl ether ND 10.0 10 02/17/2023 21:55 WG2008116 t-Amyl Alcohol ND 500 10 02/17/2023 21:55 WG2008116 tert-Butyl alcohol 65.8 50.0 10 02/17/2023 21:55 WG2008116 tert-Amyl Methyl Ether ND 10.0 10 02/17/2023 21:55 WG2008116 (S) Toluene-d8 103 80.0-120 02/17/2023 21:55 WG2008116 (S) Toluene-d8 102 80.0-120 02/23/2023 02:33 WG2011272 (S) 4-Bromofluorobenzene 96.4 77.0-126 02/17/2023 21:55 WG2008116 (S) 4-Bromofluorobenzene 87.3 77.0-126 02/23/2023 02:33 WG2011272 (S) 1,2-Dichloroethane-d4 102 70.0-130 02/17/2023 21:55 WG2008116 (S) 1,2-Dichloroethane-d4 88.9 70.0-130 02/23/2023 02:33 WG2011272 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 11 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 11 of 48 SAMPLE RESULTS - 04 L1586583 MW-4 Collected date/time: 02/15/23 00:00 Additional Information - Results for field analyses are not accredited to ISO 17025 Result Units Analyte pH (On Site)4.61 su Temperature (on-site)21.1 Deg C Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Acetone ND 50.0 1 02/17/2023 18:50 WG2008116 Acrolein ND 50.0 1 02/17/2023 18:50 WG2008116 Acrylonitrile ND 10.0 1 02/17/2023 18:50 WG2008116 Benzene ND 1.00 1 02/17/2023 18:50 WG2008116 Bromobenzene ND 1.00 1 02/17/2023 18:50 WG2008116 Bromodichloromethane ND 1.00 1 02/17/2023 18:50 WG2008116 Bromoform ND 1.00 1 02/17/2023 18:50 WG2008116 Bromomethane ND 5.00 1 02/17/2023 18:50 WG2008116 n-Butylbenzene ND 1.00 1 02/17/2023 18:50 WG2008116 sec-Butylbenzene ND 1.00 1 02/17/2023 18:50 WG2008116 tert-Butylbenzene ND 1.00 1 02/17/2023 18:50 WG2008116 Carbon tetrachloride ND 1.00 1 02/17/2023 18:50 WG2008116 Chlorobenzene ND 1.00 1 02/17/2023 18:50 WG2008116 Chlorodibromomethane ND 1.00 1 02/17/2023 18:50 WG2008116 Chloroethane ND 5.00 1 02/17/2023 18:50 WG2008116 Chloroform ND 5.00 1 02/17/2023 18:50 WG2008116 Chloromethane ND 2.50 1 02/17/2023 18:50 WG2008116 2-Chlorotoluene ND 1.00 1 02/17/2023 18:50 WG2008116 4-Chlorotoluene ND 1.00 1 02/17/2023 18:50 WG2008116 1,2-Dibromo-3-Chloropropane ND 5.00 1 02/17/2023 18:50 WG2008116 1,2-Dibromoethane ND 1.00 1 02/17/2023 18:50 WG2008116 Dibromomethane ND 1.00 1 02/17/2023 18:50 WG2008116 1,2-Dichlorobenzene ND 1.00 1 02/17/2023 18:50 WG2008116 1,3-Dichlorobenzene ND 1.00 1 02/17/2023 18:50 WG2008116 1,4-Dichlorobenzene ND 1.00 1 02/17/2023 18:50 WG2008116 Dichlorodifluoromethane ND 5.00 1 02/17/2023 18:50 WG2008116 1,1-Dichloroethane ND 1.00 1 02/17/2023 18:50 WG2008116 1,2-Dichloroethane ND 1.00 1 02/17/2023 18:50 WG2008116 1,1-Dichloroethene ND 1.00 1 02/17/2023 18:50 WG2008116 cis-1,2-Dichloroethene ND 1.00 1 02/17/2023 18:50 WG2008116 trans-1,2-Dichloroethene ND 1.00 1 02/17/2023 18:50 WG2008116 1,2-Dichloropropane ND 1.00 1 02/17/2023 18:50 WG2008116 1,1-Dichloropropene ND 1.00 1 02/17/2023 18:50 WG2008116 1,3-Dichloropropane ND 1.00 1 02/17/2023 18:50 WG2008116 2,2-Dichloropropane ND 1.00 1 02/17/2023 18:50 WG2008116 Di-isopropyl ether ND 1.00 1 02/17/2023 18:50 WG2008116 Ethylbenzene ND 1.00 1 02/17/2023 18:50 WG2008116 Hexachloro-1,3-butadiene ND 1.00 1 02/17/2023 18:50 WG2008116 Isopropylbenzene ND 1.00 1 02/17/2023 18:50 WG2008116 p-Isopropyltoluene ND 1.00 1 02/17/2023 18:50 WG2008116 2-Butanone (MEK)ND 10.0 1 02/17/2023 18:50 WG2008116 Methylene Chloride ND 5.00 1 02/17/2023 18:50 WG2008116 4-Methyl-2-pentanone (MIBK) ND 10.0 1 02/17/2023 18:50 WG2008116 Methyl tert-butyl ether 45.4 1.00 1 02/17/2023 18:50 WG2008116 Naphthalene ND 5.00 1 02/17/2023 18:50 WG2008116 n-Propylbenzene ND 1.00 1 02/17/2023 18:50 WG2008116 Styrene ND 1.00 1 02/17/2023 18:50 WG2008116 1,1,1,2-Tetrachloroethane ND 1.00 1 02/17/2023 18:50 WG2008116 1,1,2,2-Tetrachloroethane ND 1.00 1 02/17/2023 18:50 WG2008116 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 12 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 12 of 48 SAMPLE RESULTS - 04 L1586583 MW-4 Collected date/time: 02/15/23 00:00 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Tetrachloroethene ND 1.00 1 02/17/2023 18:50 WG2008116 Toluene ND 1.00 1 02/17/2023 18:50 WG2008116 1,2,3-Trichlorobenzene ND 1.00 1 02/17/2023 18:50 WG2008116 1,2,4-Trichlorobenzene ND 1.00 1 02/17/2023 18:50 WG2008116 1,1,1-Trichloroethane ND 1.00 1 02/17/2023 18:50 WG2008116 1,1,2-Trichloroethane ND 1.00 1 02/17/2023 18:50 WG2008116 Trichloroethene ND 1.00 1 02/17/2023 18:50 WG2008116 Trichlorofluoromethane ND 5.00 1 02/17/2023 18:50 WG2008116 1,2,3-Trichloropropane ND 2.50 1 02/17/2023 18:50 WG2008116 1,2,4-Trimethylbenzene ND 1.00 1 02/17/2023 18:50 WG2008116 1,3,5-Trimethylbenzene ND 1.00 1 02/17/2023 18:50 WG2008116 Vinyl chloride ND 1.00 1 02/17/2023 18:50 WG2008116 o-Xylene ND 1.00 1 02/17/2023 18:50 WG2008116 m&p-Xylenes ND 2.00 1 02/17/2023 18:50 WG2008116 Ethanol ND 100 1 02/23/2023 00:21 WG2011272 Ethyl tert-butyl ether ND 1.00 1 02/17/2023 18:50 WG2008116 t-Amyl Alcohol ND 50.0 1 02/17/2023 18:50 WG2008116 tert-Butyl alcohol 17.1 5.00 1 02/17/2023 18:50 WG2008116 tert-Amyl Methyl Ether 1.96 1.00 1 02/17/2023 18:50 WG2008116 (S) Toluene-d8 102 80.0-120 02/17/2023 18:50 WG2008116 (S) Toluene-d8 103 80.0-120 02/23/2023 00:21 WG2011272 (S) 4-Bromofluorobenzene 95.4 77.0-126 02/17/2023 18:50 WG2008116 (S) 4-Bromofluorobenzene 82.0 77.0-126 02/23/2023 00:21 WG2011272 (S) 1,2-Dichloroethane-d4 103 70.0-130 02/17/2023 18:50 WG2008116 (S) 1,2-Dichloroethane-d4 94.4 70.0-130 02/23/2023 00:21 WG2011272 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 13 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 13 of 48 SAMPLE RESULTS - 05 L1586583 MW-5 Collected date/time: 02/15/23 00:00 Additional Information - Results for field analyses are not accredited to ISO 17025 Result Units Analyte pH (On Site)4.56 su Temperature (on-site)21.2 Deg C Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Acetone ND 50.0 1 02/17/2023 19:10 WG2008116 Acrolein ND 50.0 1 02/17/2023 19:10 WG2008116 Acrylonitrile ND 10.0 1 02/17/2023 19:10 WG2008116 Benzene ND 1.00 1 02/17/2023 19:10 WG2008116 Bromobenzene ND 1.00 1 02/17/2023 19:10 WG2008116 Bromodichloromethane ND 1.00 1 02/17/2023 19:10 WG2008116 Bromoform ND 1.00 1 02/17/2023 19:10 WG2008116 Bromomethane ND 5.00 1 02/17/2023 19:10 WG2008116 n-Butylbenzene ND 1.00 1 02/17/2023 19:10 WG2008116 sec-Butylbenzene ND 1.00 1 02/17/2023 19:10 WG2008116 tert-Butylbenzene ND 1.00 1 02/17/2023 19:10 WG2008116 Carbon tetrachloride ND 1.00 1 02/17/2023 19:10 WG2008116 Chlorobenzene ND 1.00 1 02/17/2023 19:10 WG2008116 Chlorodibromomethane ND 1.00 1 02/17/2023 19:10 WG2008116 Chloroethane ND 5.00 1 02/17/2023 19:10 WG2008116 Chloroform ND 5.00 1 02/17/2023 19:10 WG2008116 Chloromethane ND 2.50 1 02/17/2023 19:10 WG2008116 2-Chlorotoluene ND 1.00 1 02/17/2023 19:10 WG2008116 4-Chlorotoluene ND 1.00 1 02/17/2023 19:10 WG2008116 1,2-Dibromo-3-Chloropropane ND 5.00 1 02/17/2023 19:10 WG2008116 1,2-Dibromoethane ND 1.00 1 02/17/2023 19:10 WG2008116 Dibromomethane ND 1.00 1 02/17/2023 19:10 WG2008116 1,2-Dichlorobenzene ND 1.00 1 02/17/2023 19:10 WG2008116 1,3-Dichlorobenzene ND 1.00 1 02/17/2023 19:10 WG2008116 1,4-Dichlorobenzene ND 1.00 1 02/17/2023 19:10 WG2008116 Dichlorodifluoromethane ND 5.00 1 02/17/2023 19:10 WG2008116 1,1-Dichloroethane ND 1.00 1 02/17/2023 19:10 WG2008116 1,2-Dichloroethane ND 1.00 1 02/17/2023 19:10 WG2008116 1,1-Dichloroethene ND 1.00 1 02/17/2023 19:10 WG2008116 cis-1,2-Dichloroethene ND 1.00 1 02/17/2023 19:10 WG2008116 trans-1,2-Dichloroethene ND 1.00 1 02/17/2023 19:10 WG2008116 1,2-Dichloropropane ND 1.00 1 02/17/2023 19:10 WG2008116 1,1-Dichloropropene ND 1.00 1 02/17/2023 19:10 WG2008116 1,3-Dichloropropane ND 1.00 1 02/17/2023 19:10 WG2008116 2,2-Dichloropropane ND 1.00 1 02/17/2023 19:10 WG2008116 Di-isopropyl ether ND 1.00 1 02/17/2023 19:10 WG2008116 Ethylbenzene ND 1.00 1 02/17/2023 19:10 WG2008116 Hexachloro-1,3-butadiene ND 1.00 1 02/17/2023 19:10 WG2008116 Isopropylbenzene ND 1.00 1 02/17/2023 19:10 WG2008116 p-Isopropyltoluene ND 1.00 1 02/17/2023 19:10 WG2008116 2-Butanone (MEK)ND 10.0 1 02/17/2023 19:10 WG2008116 Methylene Chloride ND 5.00 1 02/17/2023 19:10 WG2008116 4-Methyl-2-pentanone (MIBK) ND 10.0 1 02/17/2023 19:10 WG2008116 Methyl tert-butyl ether 17.8 1.00 1 02/17/2023 19:10 WG2008116 Naphthalene ND 5.00 1 02/17/2023 19:10 WG2008116 n-Propylbenzene ND 1.00 1 02/17/2023 19:10 WG2008116 Styrene ND 1.00 1 02/17/2023 19:10 WG2008116 1,1,1,2-Tetrachloroethane ND 1.00 1 02/17/2023 19:10 WG2008116 1,1,2,2-Tetrachloroethane ND 1.00 1 02/17/2023 19:10 WG2008116 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 14 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 14 of 48 SAMPLE RESULTS - 05 L1586583 MW-5 Collected date/time: 02/15/23 00:00 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Tetrachloroethene ND 1.00 1 02/17/2023 19:10 WG2008116 Toluene ND 1.00 1 02/17/2023 19:10 WG2008116 1,2,3-Trichlorobenzene ND 1.00 1 02/17/2023 19:10 WG2008116 1,2,4-Trichlorobenzene ND 1.00 1 02/17/2023 19:10 WG2008116 1,1,1-Trichloroethane ND 1.00 1 02/17/2023 19:10 WG2008116 1,1,2-Trichloroethane ND 1.00 1 02/17/2023 19:10 WG2008116 Trichloroethene ND 1.00 1 02/17/2023 19:10 WG2008116 Trichlorofluoromethane ND 5.00 1 02/17/2023 19:10 WG2008116 1,2,3-Trichloropropane ND 2.50 1 02/17/2023 19:10 WG2008116 1,2,4-Trimethylbenzene ND 1.00 1 02/17/2023 19:10 WG2008116 1,3,5-Trimethylbenzene ND 1.00 1 02/17/2023 19:10 WG2008116 Vinyl chloride ND 1.00 1 02/17/2023 19:10 WG2008116 o-Xylene ND 1.00 1 02/17/2023 19:10 WG2008116 m&p-Xylenes ND 2.00 1 02/17/2023 19:10 WG2008116 Ethanol ND 100 1 02/23/2023 00:44 WG2011272 Ethyl tert-butyl ether ND 1.00 1 02/17/2023 19:10 WG2008116 t-Amyl Alcohol ND 50.0 1 02/17/2023 19:10 WG2008116 tert-Butyl alcohol 7.16 5.00 1 02/17/2023 19:10 WG2008116 tert-Amyl Methyl Ether 1.40 1.00 1 02/17/2023 19:10 WG2008116 (S) Toluene-d8 104 80.0-120 02/17/2023 19:10 WG2008116 (S) Toluene-d8 106 80.0-120 02/23/2023 00:44 WG2011272 (S) 4-Bromofluorobenzene 95.4 77.0-126 02/17/2023 19:10 WG2008116 (S) 4-Bromofluorobenzene 90.5 77.0-126 02/23/2023 00:44 WG2011272 (S) 1,2-Dichloroethane-d4 106 70.0-130 02/17/2023 19:10 WG2008116 (S) 1,2-Dichloroethane-d4 99.0 70.0-130 02/23/2023 00:44 WG2011272 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 15 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 15 of 48 SAMPLE RESULTS - 06 L1586583 MW-6 Collected date/time: 02/15/23 00:00 Additional Information - Results for field analyses are not accredited to ISO 17025 Result Units Analyte pH (On Site)4.47 su Temperature (on-site)21.4 Deg C Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Acetone ND 1000 20 02/17/2023 22:15 WG2008116 Acrolein ND 1000 20 02/17/2023 22:15 WG2008116 Acrylonitrile ND 200 20 02/17/2023 22:15 WG2008116 Benzene 102 20.0 20 02/17/2023 22:15 WG2008116 Bromobenzene ND 20.0 20 02/17/2023 22:15 WG2008116 Bromodichloromethane ND 20.0 20 02/17/2023 22:15 WG2008116 Bromoform ND 20.0 20 02/17/2023 22:15 WG2008116 Bromomethane ND 100 20 02/17/2023 22:15 WG2008116 n-Butylbenzene ND 20.0 20 02/17/2023 22:15 WG2008116 sec-Butylbenzene ND 20.0 20 02/17/2023 22:15 WG2008116 tert-Butylbenzene ND 20.0 20 02/17/2023 22:15 WG2008116 Carbon tetrachloride ND 20.0 20 02/17/2023 22:15 WG2008116 Chlorobenzene ND 20.0 20 02/17/2023 22:15 WG2008116 Chlorodibromomethane ND 20.0 20 02/17/2023 22:15 WG2008116 Chloroethane ND 100 20 02/17/2023 22:15 WG2008116 Chloroform ND 100 20 02/17/2023 22:15 WG2008116 Chloromethane ND 50.0 20 02/17/2023 22:15 WG2008116 2-Chlorotoluene ND 20.0 20 02/17/2023 22:15 WG2008116 4-Chlorotoluene ND 20.0 20 02/17/2023 22:15 WG2008116 1,2-Dibromo-3-Chloropropane ND 100 20 02/17/2023 22:15 WG2008116 1,2-Dibromoethane ND 20.0 20 02/17/2023 22:15 WG2008116 Dibromomethane ND 20.0 20 02/17/2023 22:15 WG2008116 1,2-Dichlorobenzene ND 20.0 20 02/17/2023 22:15 WG2008116 1,3-Dichlorobenzene ND 20.0 20 02/17/2023 22:15 WG2008116 1,4-Dichlorobenzene ND 20.0 20 02/17/2023 22:15 WG2008116 Dichlorodifluoromethane ND 100 20 02/17/2023 22:15 WG2008116 1,1-Dichloroethane ND 20.0 20 02/17/2023 22:15 WG2008116 1,2-Dichloroethane ND 20.0 20 02/17/2023 22:15 WG2008116 1,1-Dichloroethene ND 20.0 20 02/17/2023 22:15 WG2008116 cis-1,2-Dichloroethene ND 20.0 20 02/17/2023 22:15 WG2008116 trans-1,2-Dichloroethene ND 20.0 20 02/17/2023 22:15 WG2008116 1,2-Dichloropropane ND 20.0 20 02/17/2023 22:15 WG2008116 1,1-Dichloropropene ND 20.0 20 02/17/2023 22:15 WG2008116 1,3-Dichloropropane ND 20.0 20 02/17/2023 22:15 WG2008116 2,2-Dichloropropane ND 20.0 20 02/17/2023 22:15 WG2008116 Di-isopropyl ether ND 20.0 20 02/17/2023 22:15 WG2008116 Ethylbenzene 684 20.0 20 02/17/2023 22:15 WG2008116 Hexachloro-1,3-butadiene ND 20.0 20 02/17/2023 22:15 WG2008116 Isopropylbenzene 38.7 20.0 20 02/17/2023 22:15 WG2008116 p-Isopropyltoluene ND 20.0 20 02/17/2023 22:15 WG2008116 2-Butanone (MEK)ND 200 20 02/17/2023 22:15 WG2008116 Methylene Chloride ND 100 20 02/17/2023 22:15 WG2008116 4-Methyl-2-pentanone (MIBK) ND 200 20 02/17/2023 22:15 WG2008116 Methyl tert-butyl ether 364 20.0 20 02/17/2023 22:15 WG2008116 Naphthalene 131 100 20 02/17/2023 22:15 WG2008116 n-Propylbenzene 108 20.0 20 02/17/2023 22:15 WG2008116 Styrene ND 20.0 20 02/17/2023 22:15 WG2008116 1,1,1,2-Tetrachloroethane ND 20.0 20 02/17/2023 22:15 WG2008116 1,1,2,2-Tetrachloroethane ND 20.0 20 02/17/2023 22:15 WG2008116 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 16 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 16 of 48 SAMPLE RESULTS - 06 L1586583 MW-6 Collected date/time: 02/15/23 00:00 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Tetrachloroethene ND 20.0 20 02/17/2023 22:15 WG2008116 Toluene 91.7 20.0 20 02/17/2023 22:15 WG2008116 1,2,3-Trichlorobenzene ND 20.0 20 02/17/2023 22:15 WG2008116 1,2,4-Trichlorobenzene ND 20.0 20 02/17/2023 22:15 WG2008116 1,1,1-Trichloroethane ND 20.0 20 02/17/2023 22:15 WG2008116 1,1,2-Trichloroethane ND 20.0 20 02/17/2023 22:15 WG2008116 Trichloroethene ND 20.0 20 02/17/2023 22:15 WG2008116 Trichlorofluoromethane ND 100 20 02/17/2023 22:15 WG2008116 1,2,3-Trichloropropane ND 50.0 20 02/17/2023 22:15 WG2008116 1,2,4-Trimethylbenzene 929 20.0 20 02/17/2023 22:15 WG2008116 1,3,5-Trimethylbenzene 222 20.0 20 02/17/2023 22:15 WG2008116 Vinyl chloride ND 20.0 20 02/17/2023 22:15 WG2008116 o-Xylene 1370 20.0 20 02/17/2023 22:15 WG2008116 m&p-Xylenes 2560 40.0 20 02/17/2023 22:15 WG2008116 Ethanol ND 2000 20 02/23/2023 02:55 WG2011272 Ethyl tert-butyl ether ND 20.0 20 02/17/2023 22:15 WG2008116 t-Amyl Alcohol ND 1000 20 02/17/2023 22:15 WG2008116 tert-Butyl alcohol 129 100 20 02/17/2023 22:15 WG2008116 tert-Amyl Methyl Ether 121 20.0 20 02/17/2023 22:15 WG2008116 (S) Toluene-d8 104 80.0-120 02/17/2023 22:15 WG2008116 (S) Toluene-d8 97.1 80.0-120 02/23/2023 02:55 WG2011272 (S) 4-Bromofluorobenzene 95.8 77.0-126 02/17/2023 22:15 WG2008116 (S) 4-Bromofluorobenzene 88.2 77.0-126 02/23/2023 02:55 WG2011272 (S) 1,2-Dichloroethane-d4 105 70.0-130 02/17/2023 22:15 WG2008116 (S) 1,2-Dichloroethane-d4 94.1 70.0-130 02/23/2023 02:55 WG2011272 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 17 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 17 of 48 SAMPLE RESULTS - 07 L1586583 MW-7 Collected date/time: 02/15/23 00:00 Additional Information - Results for field analyses are not accredited to ISO 17025 Result Units Analyte pH (On Site)6.14 su Temperature (on-site)16 Deg C Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Acetone ND 500 10 02/17/2023 22:36 WG2008116 Acrolein ND 500 10 02/17/2023 22:36 WG2008116 Acrylonitrile ND 100 10 02/17/2023 22:36 WG2008116 Benzene 63.0 10.0 10 02/17/2023 22:36 WG2008116 Bromobenzene ND 10.0 10 02/17/2023 22:36 WG2008116 Bromodichloromethane ND 10.0 10 02/17/2023 22:36 WG2008116 Bromoform ND 10.0 10 02/17/2023 22:36 WG2008116 Bromomethane ND 50.0 10 02/17/2023 22:36 WG2008116 n-Butylbenzene ND 10.0 10 02/17/2023 22:36 WG2008116 sec-Butylbenzene ND 10.0 10 02/17/2023 22:36 WG2008116 tert-Butylbenzene ND 10.0 10 02/17/2023 22:36 WG2008116 Carbon tetrachloride ND 10.0 10 02/17/2023 22:36 WG2008116 Chlorobenzene ND 10.0 10 02/17/2023 22:36 WG2008116 Chlorodibromomethane ND 10.0 10 02/17/2023 22:36 WG2008116 Chloroethane ND 50.0 10 02/17/2023 22:36 WG2008116 Chloroform ND 50.0 10 02/17/2023 22:36 WG2008116 Chloromethane ND 25.0 10 02/17/2023 22:36 WG2008116 2-Chlorotoluene ND 10.0 10 02/17/2023 22:36 WG2008116 4-Chlorotoluene ND 10.0 10 02/17/2023 22:36 WG2008116 1,2-Dibromo-3-Chloropropane ND 50.0 10 02/17/2023 22:36 WG2008116 1,2-Dibromoethane ND 10.0 10 02/17/2023 22:36 WG2008116 Dibromomethane ND 10.0 10 02/17/2023 22:36 WG2008116 1,2-Dichlorobenzene ND 10.0 10 02/17/2023 22:36 WG2008116 1,3-Dichlorobenzene ND 10.0 10 02/17/2023 22:36 WG2008116 1,4-Dichlorobenzene ND 10.0 10 02/17/2023 22:36 WG2008116 Dichlorodifluoromethane ND 50.0 10 02/17/2023 22:36 WG2008116 1,1-Dichloroethane ND 10.0 10 02/17/2023 22:36 WG2008116 1,2-Dichloroethane ND 10.0 10 02/17/2023 22:36 WG2008116 1,1-Dichloroethene ND 10.0 10 02/17/2023 22:36 WG2008116 cis-1,2-Dichloroethene ND 10.0 10 02/17/2023 22:36 WG2008116 trans-1,2-Dichloroethene ND 10.0 10 02/17/2023 22:36 WG2008116 1,2-Dichloropropane ND 10.0 10 02/17/2023 22:36 WG2008116 1,1-Dichloropropene ND 10.0 10 02/17/2023 22:36 WG2008116 1,3-Dichloropropane ND 10.0 10 02/17/2023 22:36 WG2008116 2,2-Dichloropropane ND 10.0 10 02/17/2023 22:36 WG2008116 Di-isopropyl ether ND 10.0 10 02/17/2023 22:36 WG2008116 Ethylbenzene ND 10.0 10 02/17/2023 22:36 WG2008116 Hexachloro-1,3-butadiene ND 10.0 10 02/17/2023 22:36 WG2008116 Isopropylbenzene 31.8 10.0 10 02/17/2023 22:36 WG2008116 p-Isopropyltoluene ND 10.0 10 02/17/2023 22:36 WG2008116 2-Butanone (MEK)ND 100 10 02/17/2023 22:36 WG2008116 Methylene Chloride ND 50.0 10 02/17/2023 22:36 WG2008116 4-Methyl-2-pentanone (MIBK) ND 100 10 02/17/2023 22:36 WG2008116 Methyl tert-butyl ether ND 10.0 10 02/17/2023 22:36 WG2008116 Naphthalene 125 50.0 10 02/17/2023 22:36 WG2008116 n-Propylbenzene 35.9 10.0 10 02/17/2023 22:36 WG2008116 Styrene ND 10.0 10 02/17/2023 22:36 WG2008116 1,1,1,2-Tetrachloroethane ND 10.0 10 02/17/2023 22:36 WG2008116 1,1,2,2-Tetrachloroethane ND 10.0 10 02/17/2023 22:36 WG2008116 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 18 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 18 of 48 SAMPLE RESULTS - 07 L1586583 MW-7 Collected date/time: 02/15/23 00:00 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Tetrachloroethene ND 10.0 10 02/17/2023 22:36 WG2008116 Toluene ND 10.0 10 02/17/2023 22:36 WG2008116 1,2,3-Trichlorobenzene ND 10.0 10 02/17/2023 22:36 WG2008116 1,2,4-Trichlorobenzene ND 10.0 10 02/17/2023 22:36 WG2008116 1,1,1-Trichloroethane ND 10.0 10 02/17/2023 22:36 WG2008116 1,1,2-Trichloroethane ND 10.0 10 02/17/2023 22:36 WG2008116 Trichloroethene ND 10.0 10 02/17/2023 22:36 WG2008116 Trichlorofluoromethane ND 50.0 10 02/17/2023 22:36 WG2008116 1,2,3-Trichloropropane ND 25.0 10 02/17/2023 22:36 WG2008116 1,2,4-Trimethylbenzene 77.1 10.0 10 02/17/2023 22:36 WG2008116 1,3,5-Trimethylbenzene ND 10.0 10 02/17/2023 22:36 WG2008116 Vinyl chloride ND 10.0 10 02/17/2023 22:36 WG2008116 o-Xylene ND 10.0 10 02/17/2023 22:36 WG2008116 m&p-Xylenes 67.4 20.0 10 02/17/2023 22:36 WG2008116 Ethanol ND 1000 10 02/23/2023 03:17 WG2011272 Ethyl tert-butyl ether ND 10.0 10 02/17/2023 22:36 WG2008116 t-Amyl Alcohol ND 500 10 02/17/2023 22:36 WG2008116 tert-Butyl alcohol 55.5 50.0 10 02/17/2023 22:36 WG2008116 tert-Amyl Methyl Ether ND 10.0 10 02/17/2023 22:36 WG2008116 (S) Toluene-d8 104 80.0-120 02/17/2023 22:36 WG2008116 (S) Toluene-d8 102 80.0-120 02/23/2023 03:17 WG2011272 (S) 4-Bromofluorobenzene 97.1 77.0-126 02/17/2023 22:36 WG2008116 (S) 4-Bromofluorobenzene 88.7 77.0-126 02/23/2023 03:17 WG2011272 (S) 1,2-Dichloroethane-d4 105 70.0-130 02/17/2023 22:36 WG2008116 (S) 1,2-Dichloroethane-d4 91.1 70.0-130 02/23/2023 03:17 WG2011272 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 19 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 19 of 48 SAMPLE RESULTS - 08 L1586583 MW-8 Collected date/time: 02/15/23 00:00 Additional Information - Results for field analyses are not accredited to ISO 17025 Result Units Analyte pH (On Site)5.5 su Temperature (on-site)21.1 Deg C Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Acetone ND 50.0 1 02/17/2023 19:31 WG2008116 Acrolein ND 50.0 1 02/17/2023 19:31 WG2008116 Acrylonitrile ND 10.0 1 02/17/2023 19:31 WG2008116 Benzene ND 1.00 1 02/17/2023 19:31 WG2008116 Bromobenzene ND 1.00 1 02/17/2023 19:31 WG2008116 Bromodichloromethane ND 1.00 1 02/17/2023 19:31 WG2008116 Bromoform ND 1.00 1 02/17/2023 19:31 WG2008116 Bromomethane ND 5.00 1 02/17/2023 19:31 WG2008116 n-Butylbenzene ND 1.00 1 02/17/2023 19:31 WG2008116 sec-Butylbenzene ND 1.00 1 02/17/2023 19:31 WG2008116 tert-Butylbenzene ND 1.00 1 02/17/2023 19:31 WG2008116 Carbon tetrachloride ND 1.00 1 02/17/2023 19:31 WG2008116 Chlorobenzene ND 1.00 1 02/17/2023 19:31 WG2008116 Chlorodibromomethane ND 1.00 1 02/17/2023 19:31 WG2008116 Chloroethane ND 5.00 1 02/17/2023 19:31 WG2008116 Chloroform ND 5.00 1 02/17/2023 19:31 WG2008116 Chloromethane ND 2.50 1 02/17/2023 19:31 WG2008116 2-Chlorotoluene ND 1.00 1 02/17/2023 19:31 WG2008116 4-Chlorotoluene ND 1.00 1 02/17/2023 19:31 WG2008116 1,2-Dibromo-3-Chloropropane ND 5.00 1 02/17/2023 19:31 WG2008116 1,2-Dibromoethane ND 1.00 1 02/17/2023 19:31 WG2008116 Dibromomethane ND 1.00 1 02/17/2023 19:31 WG2008116 1,2-Dichlorobenzene ND 1.00 1 02/17/2023 19:31 WG2008116 1,3-Dichlorobenzene ND 1.00 1 02/17/2023 19:31 WG2008116 1,4-Dichlorobenzene ND 1.00 1 02/17/2023 19:31 WG2008116 Dichlorodifluoromethane ND 5.00 1 02/17/2023 19:31 WG2008116 1,1-Dichloroethane ND 1.00 1 02/17/2023 19:31 WG2008116 1,2-Dichloroethane ND 1.00 1 02/17/2023 19:31 WG2008116 1,1-Dichloroethene ND 1.00 1 02/17/2023 19:31 WG2008116 cis-1,2-Dichloroethene ND 1.00 1 02/17/2023 19:31 WG2008116 trans-1,2-Dichloroethene ND 1.00 1 02/17/2023 19:31 WG2008116 1,2-Dichloropropane ND 1.00 1 02/17/2023 19:31 WG2008116 1,1-Dichloropropene ND 1.00 1 02/17/2023 19:31 WG2008116 1,3-Dichloropropane ND 1.00 1 02/17/2023 19:31 WG2008116 2,2-Dichloropropane ND 1.00 1 02/17/2023 19:31 WG2008116 Di-isopropyl ether ND 1.00 1 02/17/2023 19:31 WG2008116 Ethylbenzene ND 1.00 1 02/17/2023 19:31 WG2008116 Hexachloro-1,3-butadiene ND 1.00 1 02/17/2023 19:31 WG2008116 Isopropylbenzene ND 1.00 1 02/17/2023 19:31 WG2008116 p-Isopropyltoluene ND 1.00 1 02/17/2023 19:31 WG2008116 2-Butanone (MEK)ND 10.0 1 02/17/2023 19:31 WG2008116 Methylene Chloride ND 5.00 1 02/17/2023 19:31 WG2008116 4-Methyl-2-pentanone (MIBK) ND 10.0 1 02/17/2023 19:31 WG2008116 Methyl tert-butyl ether ND 1.00 1 02/17/2023 19:31 WG2008116 Naphthalene ND 5.00 1 02/17/2023 19:31 WG2008116 n-Propylbenzene ND 1.00 1 02/17/2023 19:31 WG2008116 Styrene ND 1.00 1 02/17/2023 19:31 WG2008116 1,1,1,2-Tetrachloroethane ND 1.00 1 02/17/2023 19:31 WG2008116 1,1,2,2-Tetrachloroethane ND 1.00 1 02/17/2023 19:31 WG2008116 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 20 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 20 of 48 SAMPLE RESULTS - 08 L1586583 MW-8 Collected date/time: 02/15/23 00:00 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Tetrachloroethene ND 1.00 1 02/17/2023 19:31 WG2008116 Toluene ND 1.00 1 02/17/2023 19:31 WG2008116 1,2,3-Trichlorobenzene ND 1.00 1 02/17/2023 19:31 WG2008116 1,2,4-Trichlorobenzene ND 1.00 1 02/17/2023 19:31 WG2008116 1,1,1-Trichloroethane ND 1.00 1 02/17/2023 19:31 WG2008116 1,1,2-Trichloroethane ND 1.00 1 02/17/2023 19:31 WG2008116 Trichloroethene ND 1.00 1 02/17/2023 19:31 WG2008116 Trichlorofluoromethane ND 5.00 1 02/17/2023 19:31 WG2008116 1,2,3-Trichloropropane ND 2.50 1 02/17/2023 19:31 WG2008116 1,2,4-Trimethylbenzene ND 1.00 1 02/17/2023 19:31 WG2008116 1,3,5-Trimethylbenzene ND 1.00 1 02/17/2023 19:31 WG2008116 Vinyl chloride ND 1.00 1 02/17/2023 19:31 WG2008116 o-Xylene ND 1.00 1 02/17/2023 19:31 WG2008116 m&p-Xylenes ND 2.00 1 02/17/2023 19:31 WG2008116 Ethanol ND 100 1 02/23/2023 01:06 WG2011272 Ethyl tert-butyl ether ND 1.00 1 02/17/2023 19:31 WG2008116 t-Amyl Alcohol ND 50.0 1 02/17/2023 19:31 WG2008116 tert-Butyl alcohol ND 5.00 1 02/17/2023 19:31 WG2008116 tert-Amyl Methyl Ether ND 1.00 1 02/17/2023 19:31 WG2008116 (S) Toluene-d8 104 80.0-120 02/17/2023 19:31 WG2008116 (S) Toluene-d8 102 80.0-120 02/23/2023 01:06 WG2011272 (S) 4-Bromofluorobenzene 95.2 77.0-126 02/17/2023 19:31 WG2008116 (S) 4-Bromofluorobenzene 79.7 77.0-126 02/23/2023 01:06 WG2011272 (S) 1,2-Dichloroethane-d4 105 70.0-130 02/17/2023 19:31 WG2008116 (S) 1,2-Dichloroethane-d4 104 70.0-130 02/23/2023 01:06 WG2011272 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 21 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 21 of 48 SAMPLE RESULTS - 09 L1586583 MW-9 Collected date/time: 02/15/23 00:00 Additional Information - Results for field analyses are not accredited to ISO 17025 Result Units Analyte pH (On Site)5.85 su Temperature (on-site)20.9 Deg C Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Acetone ND 50.0 1 02/17/2023 19:52 WG2008116 Acrolein ND 50.0 1 02/17/2023 19:52 WG2008116 Acrylonitrile ND 10.0 1 02/17/2023 19:52 WG2008116 Benzene ND 1.00 1 02/17/2023 19:52 WG2008116 Bromobenzene ND 1.00 1 02/17/2023 19:52 WG2008116 Bromodichloromethane ND 1.00 1 02/17/2023 19:52 WG2008116 Bromoform ND 1.00 1 02/17/2023 19:52 WG2008116 Bromomethane ND 5.00 1 02/17/2023 19:52 WG2008116 n-Butylbenzene ND 1.00 1 02/17/2023 19:52 WG2008116 sec-Butylbenzene ND 1.00 1 02/17/2023 19:52 WG2008116 tert-Butylbenzene ND 1.00 1 02/17/2023 19:52 WG2008116 Carbon tetrachloride ND 1.00 1 02/17/2023 19:52 WG2008116 Chlorobenzene ND 1.00 1 02/17/2023 19:52 WG2008116 Chlorodibromomethane ND 1.00 1 02/17/2023 19:52 WG2008116 Chloroethane ND 5.00 1 02/17/2023 19:52 WG2008116 Chloroform ND 5.00 1 02/17/2023 19:52 WG2008116 Chloromethane ND 2.50 1 02/17/2023 19:52 WG2008116 2-Chlorotoluene ND 1.00 1 02/17/2023 19:52 WG2008116 4-Chlorotoluene ND 1.00 1 02/17/2023 19:52 WG2008116 1,2-Dibromo-3-Chloropropane ND 5.00 1 02/17/2023 19:52 WG2008116 1,2-Dibromoethane ND 1.00 1 02/17/2023 19:52 WG2008116 Dibromomethane ND 1.00 1 02/17/2023 19:52 WG2008116 1,2-Dichlorobenzene ND 1.00 1 02/17/2023 19:52 WG2008116 1,3-Dichlorobenzene ND 1.00 1 02/17/2023 19:52 WG2008116 1,4-Dichlorobenzene ND 1.00 1 02/17/2023 19:52 WG2008116 Dichlorodifluoromethane ND 5.00 1 02/17/2023 19:52 WG2008116 1,1-Dichloroethane ND 1.00 1 02/17/2023 19:52 WG2008116 1,2-Dichloroethane ND 1.00 1 02/17/2023 19:52 WG2008116 1,1-Dichloroethene ND 1.00 1 02/17/2023 19:52 WG2008116 cis-1,2-Dichloroethene ND 1.00 1 02/17/2023 19:52 WG2008116 trans-1,2-Dichloroethene ND 1.00 1 02/17/2023 19:52 WG2008116 1,2-Dichloropropane ND 1.00 1 02/17/2023 19:52 WG2008116 1,1-Dichloropropene ND 1.00 1 02/17/2023 19:52 WG2008116 1,3-Dichloropropane ND 1.00 1 02/17/2023 19:52 WG2008116 2,2-Dichloropropane ND 1.00 1 02/17/2023 19:52 WG2008116 Di-isopropyl ether ND 1.00 1 02/17/2023 19:52 WG2008116 Ethylbenzene ND 1.00 1 02/17/2023 19:52 WG2008116 Hexachloro-1,3-butadiene ND 1.00 1 02/17/2023 19:52 WG2008116 Isopropylbenzene ND 1.00 1 02/17/2023 19:52 WG2008116 p-Isopropyltoluene ND 1.00 1 02/17/2023 19:52 WG2008116 2-Butanone (MEK)ND 10.0 1 02/17/2023 19:52 WG2008116 Methylene Chloride ND 5.00 1 02/17/2023 19:52 WG2008116 4-Methyl-2-pentanone (MIBK) ND 10.0 1 02/17/2023 19:52 WG2008116 Methyl tert-butyl ether 14.1 1.00 1 02/17/2023 19:52 WG2008116 Naphthalene ND 5.00 1 02/17/2023 19:52 WG2008116 n-Propylbenzene ND 1.00 1 02/17/2023 19:52 WG2008116 Styrene ND 1.00 1 02/17/2023 19:52 WG2008116 1,1,1,2-Tetrachloroethane ND 1.00 1 02/17/2023 19:52 WG2008116 1,1,2,2-Tetrachloroethane ND 1.00 1 02/17/2023 19:52 WG2008116 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 22 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 22 of 48 SAMPLE RESULTS - 09 L1586583 MW-9 Collected date/time: 02/15/23 00:00 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Tetrachloroethene ND 1.00 1 02/17/2023 19:52 WG2008116 Toluene ND 1.00 1 02/17/2023 19:52 WG2008116 1,2,3-Trichlorobenzene ND 1.00 1 02/17/2023 19:52 WG2008116 1,2,4-Trichlorobenzene ND 1.00 1 02/17/2023 19:52 WG2008116 1,1,1-Trichloroethane ND 1.00 1 02/17/2023 19:52 WG2008116 1,1,2-Trichloroethane ND 1.00 1 02/17/2023 19:52 WG2008116 Trichloroethene ND 1.00 1 02/17/2023 19:52 WG2008116 Trichlorofluoromethane ND 5.00 1 02/17/2023 19:52 WG2008116 1,2,3-Trichloropropane ND 2.50 1 02/17/2023 19:52 WG2008116 1,2,4-Trimethylbenzene ND 1.00 1 02/17/2023 19:52 WG2008116 1,3,5-Trimethylbenzene ND 1.00 1 02/17/2023 19:52 WG2008116 Vinyl chloride ND 1.00 1 02/17/2023 19:52 WG2008116 o-Xylene ND 1.00 1 02/17/2023 19:52 WG2008116 m&p-Xylenes ND 2.00 1 02/17/2023 19:52 WG2008116 Ethanol ND 100 1 02/23/2023 01:27 WG2011272 Ethyl tert-butyl ether ND 1.00 1 02/17/2023 19:52 WG2008116 t-Amyl Alcohol 91.9 50.0 1 02/17/2023 19:52 WG2008116 tert-Butyl alcohol 200 5.00 1 02/17/2023 19:52 WG2008116 tert-Amyl Methyl Ether ND 1.00 1 02/17/2023 19:52 WG2008116 (S) Toluene-d8 103 80.0-120 02/17/2023 19:52 WG2008116 (S) Toluene-d8 104 80.0-120 02/23/2023 01:27 WG2011272 (S) 4-Bromofluorobenzene 96.7 77.0-126 02/17/2023 19:52 WG2008116 (S) 4-Bromofluorobenzene 80.2 77.0-126 02/23/2023 01:27 WG2011272 (S) 1,2-Dichloroethane-d4 103 70.0-130 02/17/2023 19:52 WG2008116 (S) 1,2-Dichloroethane-d4 93.8 70.0-130 02/23/2023 01:27 WG2011272 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 23 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 23 of 48 SAMPLE RESULTS - 10 L1586583 UPGRADIENT Collected date/time: 02/15/23 00:00 Additional Information - Results for field analyses are not accredited to ISO 17025 Result Units Analyte pH (On Site)7.91 su Temperature (on-site)16.5 Deg C Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Acetone ND 50.0 1 02/23/2023 14:41 WG2011532 Acrolein ND 50.0 1 02/23/2023 14:41 WG2011532 Acrylonitrile ND 10.0 1 02/23/2023 14:41 WG2011532 Benzene ND 1.00 1 02/23/2023 14:41 WG2011532 Bromobenzene ND 1.00 1 02/23/2023 14:41 WG2011532 Bromodichloromethane ND 1.00 1 02/23/2023 14:41 WG2011532 Bromoform ND 1.00 1 02/23/2023 14:41 WG2011532 Bromomethane ND 5.00 1 02/23/2023 14:41 WG2011532 n-Butylbenzene ND 1.00 1 02/23/2023 14:41 WG2011532 sec-Butylbenzene ND J4 1.00 1 02/23/2023 14:41 WG2011532 tert-Butylbenzene ND 1.00 1 02/23/2023 14:41 WG2011532 Carbon tetrachloride ND 1.00 1 02/23/2023 14:41 WG2011532 Chlorobenzene ND 1.00 1 02/23/2023 14:41 WG2011532 Chlorodibromomethane ND 1.00 1 02/23/2023 14:41 WG2011532 Chloroethane ND 5.00 1 02/23/2023 14:41 WG2011532 Chloroform ND 5.00 1 02/23/2023 14:41 WG2011532 Chloromethane ND 2.50 1 02/23/2023 14:41 WG2011532 2-Chlorotoluene ND 1.00 1 02/23/2023 14:41 WG2011532 4-Chlorotoluene ND 1.00 1 02/23/2023 14:41 WG2011532 1,2-Dibromo-3-Chloropropane ND 5.00 1 02/23/2023 14:41 WG2011532 1,2-Dibromoethane ND 1.00 1 02/23/2023 14:41 WG2011532 Dibromomethane ND 1.00 1 02/23/2023 14:41 WG2011532 1,2-Dichlorobenzene ND 1.00 1 02/23/2023 14:41 WG2011532 1,3-Dichlorobenzene ND 1.00 1 02/23/2023 14:41 WG2011532 1,4-Dichlorobenzene ND 1.00 1 02/23/2023 14:41 WG2011532 Dichlorodifluoromethane ND 5.00 1 02/23/2023 14:41 WG2011532 1,1-Dichloroethane ND 1.00 1 02/23/2023 14:41 WG2011532 1,2-Dichloroethane ND 1.00 1 02/23/2023 14:41 WG2011532 1,1-Dichloroethene ND 1.00 1 02/23/2023 14:41 WG2011532 cis-1,2-Dichloroethene ND 1.00 1 02/23/2023 14:41 WG2011532 trans-1,2-Dichloroethene ND 1.00 1 02/23/2023 14:41 WG2011532 1,2-Dichloropropane ND 1.00 1 02/23/2023 14:41 WG2011532 1,1-Dichloropropene ND 1.00 1 02/23/2023 14:41 WG2011532 1,3-Dichloropropane ND 1.00 1 02/23/2023 14:41 WG2011532 2,2-Dichloropropane ND 1.00 1 02/23/2023 14:41 WG2011532 Di-isopropyl ether ND 1.00 1 02/23/2023 14:41 WG2011532 Ethylbenzene ND 1.00 1 02/23/2023 14:41 WG2011532 Hexachloro-1,3-butadiene ND 1.00 1 02/23/2023 14:41 WG2011532 Isopropylbenzene ND 1.00 1 02/23/2023 14:41 WG2011532 p-Isopropyltoluene ND 1.00 1 02/23/2023 14:41 WG2011532 2-Butanone (MEK)ND 10.0 1 02/23/2023 14:41 WG2011532 Methylene Chloride ND 5.00 1 02/23/2023 14:41 WG2011532 4-Methyl-2-pentanone (MIBK) ND 10.0 1 02/23/2023 14:41 WG2011532 Methyl tert-butyl ether ND 1.00 1 02/23/2023 14:41 WG2011532 Naphthalene ND 5.00 1 02/23/2023 14:41 WG2011532 n-Propylbenzene ND 1.00 1 02/23/2023 14:41 WG2011532 Styrene ND 1.00 1 02/23/2023 14:41 WG2011532 1,1,1,2-Tetrachloroethane ND 1.00 1 02/23/2023 14:41 WG2011532 1,1,2,2-Tetrachloroethane ND 1.00 1 02/23/2023 14:41 WG2011532 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 24 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 24 of 48 SAMPLE RESULTS - 10 L1586583 UPGRADIENT Collected date/time: 02/15/23 00:00 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Tetrachloroethene ND 1.00 1 02/23/2023 14:41 WG2011532 Toluene ND 1.00 1 02/23/2023 14:41 WG2011532 1,2,3-Trichlorobenzene ND J3 1.00 1 02/23/2023 14:41 WG2011532 1,2,4-Trichlorobenzene ND J3 1.00 1 02/23/2023 14:41 WG2011532 1,1,1-Trichloroethane ND 1.00 1 02/23/2023 14:41 WG2011532 1,1,2-Trichloroethane ND 1.00 1 02/23/2023 14:41 WG2011532 Trichloroethene ND 1.00 1 02/23/2023 14:41 WG2011532 Trichlorofluoromethane ND 5.00 1 02/23/2023 14:41 WG2011532 1,2,3-Trichloropropane ND 2.50 1 02/23/2023 14:41 WG2011532 1,2,4-Trimethylbenzene ND 1.00 1 02/23/2023 14:41 WG2011532 1,3,5-Trimethylbenzene ND 1.00 1 02/23/2023 14:41 WG2011532 Vinyl chloride ND 1.00 1 02/23/2023 14:41 WG2011532 o-Xylene ND 1.00 1 02/23/2023 14:41 WG2011532 m&p-Xylenes ND 2.00 1 02/23/2023 14:41 WG2011532 Ethanol ND 100 1 02/23/2023 14:41 WG2011532 Ethyl tert-butyl ether ND 1.00 1 02/23/2023 14:41 WG2011532 t-Amyl Alcohol ND 50.0 1 02/23/2023 14:41 WG2011532 tert-Butyl alcohol ND 5.00 1 02/23/2023 14:41 WG2011532 tert-Amyl Methyl Ether ND 1.00 1 02/23/2023 14:41 WG2011532 (S) Toluene-d8 115 80.0-120 02/23/2023 14:41 WG2011532 (S) 4-Bromofluorobenzene 111 77.0-126 02/23/2023 14:41 WG2011532 (S) 1,2-Dichloroethane-d4 95.6 70.0-130 02/23/2023 14:41 WG2011532 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 25 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 25 of 48 SAMPLE RESULTS - 11 L1586583 AT TANK SITE Collected date/time: 02/15/23 00:00 Additional Information - Results for field analyses are not accredited to ISO 17025 Result Units Analyte pH (On Site)7.74 su Temperature (on-site)16.64 Deg C Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Acetone ND 50.0 1 02/23/2023 07:43 WG2011291 Acrolein ND J3 50.0 1 02/23/2023 07:43 WG2011291 Acrylonitrile ND 10.0 1 02/23/2023 07:43 WG2011291 Benzene ND 1.00 1 02/23/2023 07:43 WG2011291 Bromobenzene ND 1.00 1 02/23/2023 07:43 WG2011291 Bromodichloromethane ND 1.00 1 02/23/2023 07:43 WG2011291 Bromoform ND 1.00 1 02/23/2023 07:43 WG2011291 Bromomethane ND 5.00 1 02/23/2023 07:43 WG2011291 n-Butylbenzene ND 1.00 1 02/23/2023 07:43 WG2011291 sec-Butylbenzene ND 1.00 1 02/23/2023 07:43 WG2011291 tert-Butylbenzene ND 1.00 1 02/23/2023 07:43 WG2011291 Carbon tetrachloride ND 1.00 1 02/23/2023 07:43 WG2011291 Chlorobenzene ND 1.00 1 02/23/2023 07:43 WG2011291 Chlorodibromomethane ND 1.00 1 02/23/2023 07:43 WG2011291 Chloroethane ND 5.00 1 02/23/2023 07:43 WG2011291 Chloroform ND 5.00 1 02/23/2023 07:43 WG2011291 Chloromethane ND 2.50 1 02/23/2023 11:56 WG2011484 2-Chlorotoluene ND 1.00 1 02/23/2023 07:43 WG2011291 4-Chlorotoluene ND 1.00 1 02/23/2023 07:43 WG2011291 1,2-Dibromo-3-Chloropropane ND 5.00 1 02/23/2023 07:43 WG2011291 1,2-Dibromoethane ND 1.00 1 02/23/2023 07:43 WG2011291 Dibromomethane ND 1.00 1 02/23/2023 07:43 WG2011291 1,2-Dichlorobenzene ND 1.00 1 02/23/2023 07:43 WG2011291 1,3-Dichlorobenzene ND 1.00 1 02/23/2023 07:43 WG2011291 1,4-Dichlorobenzene ND 1.00 1 02/23/2023 07:43 WG2011291 Dichlorodifluoromethane ND 5.00 1 02/23/2023 07:43 WG2011291 1,1-Dichloroethane ND 1.00 1 02/23/2023 07:43 WG2011291 1,2-Dichloroethane ND 1.00 1 02/23/2023 07:43 WG2011291 1,1-Dichloroethene ND 1.00 1 02/23/2023 07:43 WG2011291 cis-1,2-Dichloroethene ND 1.00 1 02/23/2023 07:43 WG2011291 trans-1,2-Dichloroethene ND 1.00 1 02/23/2023 07:43 WG2011291 1,2-Dichloropropane ND 1.00 1 02/23/2023 07:43 WG2011291 1,1-Dichloropropene ND 1.00 1 02/23/2023 07:43 WG2011291 1,3-Dichloropropane ND 1.00 1 02/23/2023 07:43 WG2011291 2,2-Dichloropropane ND J3 1.00 1 02/23/2023 07:43 WG2011291 Di-isopropyl ether ND 1.00 1 02/23/2023 07:43 WG2011291 Ethylbenzene ND 1.00 1 02/23/2023 07:43 WG2011291 Hexachloro-1,3-butadiene ND 1.00 1 02/23/2023 07:43 WG2011291 Isopropylbenzene ND 1.00 1 02/23/2023 07:43 WG2011291 p-Isopropyltoluene ND 1.00 1 02/23/2023 07:43 WG2011291 2-Butanone (MEK)ND 10.0 1 02/23/2023 07:43 WG2011291 Methylene Chloride ND 5.00 1 02/23/2023 07:43 WG2011291 4-Methyl-2-pentanone (MIBK) ND 10.0 1 02/23/2023 07:43 WG2011291 Methyl tert-butyl ether ND 1.00 1 02/23/2023 07:43 WG2011291 Naphthalene ND 5.00 1 02/23/2023 07:43 WG2011291 n-Propylbenzene ND 1.00 1 02/23/2023 07:43 WG2011291 Styrene ND 1.00 1 02/23/2023 07:43 WG2011291 1,1,1,2-Tetrachloroethane ND 1.00 1 02/23/2023 07:43 WG2011291 1,1,2,2-Tetrachloroethane ND J3 1.00 1 02/23/2023 07:43 WG2011291 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 26 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 26 of 48 SAMPLE RESULTS - 11 L1586583 AT TANK SITE Collected date/time: 02/15/23 00:00 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Tetrachloroethene ND 1.00 1 02/23/2023 07:43 WG2011291 Toluene ND 1.00 1 02/23/2023 07:43 WG2011291 1,2,3-Trichlorobenzene ND 1.00 1 02/23/2023 07:43 WG2011291 1,2,4-Trichlorobenzene ND 1.00 1 02/23/2023 07:43 WG2011291 1,1,1-Trichloroethane ND 1.00 1 02/23/2023 07:43 WG2011291 1,1,2-Trichloroethane ND 1.00 1 02/23/2023 07:43 WG2011291 Trichloroethene ND 1.00 1 02/23/2023 07:43 WG2011291 Trichlorofluoromethane ND 5.00 1 02/23/2023 07:43 WG2011291 1,2,3-Trichloropropane ND 2.50 1 02/23/2023 07:43 WG2011291 1,2,4-Trimethylbenzene ND 1.00 1 02/23/2023 07:43 WG2011291 1,3,5-Trimethylbenzene ND 1.00 1 02/23/2023 07:43 WG2011291 Vinyl chloride ND 1.00 1 02/23/2023 07:43 WG2011291 o-Xylene ND 1.00 1 02/23/2023 07:43 WG2011291 m&p-Xylenes ND 2.00 1 02/23/2023 07:43 WG2011291 Ethanol ND 100 1 02/23/2023 11:56 WG2011484 Ethyl tert-butyl ether ND 1.00 1 02/23/2023 07:43 WG2011291 t-Amyl Alcohol ND 50.0 1 02/23/2023 07:43 WG2011291 tert-Butyl alcohol ND 5.00 1 02/23/2023 07:43 WG2011291 tert-Amyl Methyl Ether ND 1.00 1 02/23/2023 07:43 WG2011291 (S) Toluene-d8 108 80.0-120 02/23/2023 07:43 WG2011291 (S) Toluene-d8 116 80.0-120 02/23/2023 11:56 WG2011484 (S) 4-Bromofluorobenzene 106 77.0-126 02/23/2023 07:43 WG2011291 (S) 4-Bromofluorobenzene 108 77.0-126 02/23/2023 11:56 WG2011484 (S) 1,2-Dichloroethane-d4 106 70.0-130 02/23/2023 07:43 WG2011291 (S) 1,2-Dichloroethane-d4 99.2 70.0-130 02/23/2023 11:56 WG2011484 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 27 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 27 of 48 SAMPLE RESULTS - 12 L1586583 DOWNGRADIENT Collected date/time: 02/15/23 00:00 Additional Information - Results for field analyses are not accredited to ISO 17025 Result Units Analyte pH (On Site)7.76 su Temperature (on-site)16.9 Deg C Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Acetone ND 50.0 1 02/23/2023 08:03 WG2011291 Acrolein ND J3 50.0 1 02/23/2023 08:03 WG2011291 Acrylonitrile ND 10.0 1 02/23/2023 08:03 WG2011291 Benzene ND 1.00 1 02/23/2023 08:03 WG2011291 Bromobenzene ND 1.00 1 02/23/2023 08:03 WG2011291 Bromodichloromethane ND 1.00 1 02/23/2023 08:03 WG2011291 Bromoform ND 1.00 1 02/23/2023 08:03 WG2011291 Bromomethane ND 5.00 1 02/23/2023 08:03 WG2011291 n-Butylbenzene ND 1.00 1 02/23/2023 08:03 WG2011291 sec-Butylbenzene ND 1.00 1 02/23/2023 08:03 WG2011291 tert-Butylbenzene ND 1.00 1 02/23/2023 08:03 WG2011291 Carbon tetrachloride ND 1.00 1 02/23/2023 08:03 WG2011291 Chlorobenzene ND 1.00 1 02/23/2023 08:03 WG2011291 Chlorodibromomethane ND 1.00 1 02/23/2023 08:03 WG2011291 Chloroethane ND 5.00 1 02/23/2023 08:03 WG2011291 Chloroform ND 5.00 1 02/23/2023 08:03 WG2011291 Chloromethane ND 2.50 1 02/23/2023 12:17 WG2011484 2-Chlorotoluene ND 1.00 1 02/23/2023 08:03 WG2011291 4-Chlorotoluene ND 1.00 1 02/23/2023 08:03 WG2011291 1,2-Dibromo-3-Chloropropane ND 5.00 1 02/23/2023 08:03 WG2011291 1,2-Dibromoethane ND 1.00 1 02/23/2023 08:03 WG2011291 Dibromomethane ND 1.00 1 02/23/2023 08:03 WG2011291 1,2-Dichlorobenzene ND 1.00 1 02/23/2023 08:03 WG2011291 1,3-Dichlorobenzene ND 1.00 1 02/23/2023 08:03 WG2011291 1,4-Dichlorobenzene ND 1.00 1 02/23/2023 08:03 WG2011291 Dichlorodifluoromethane ND 5.00 1 02/23/2023 08:03 WG2011291 1,1-Dichloroethane ND 1.00 1 02/23/2023 08:03 WG2011291 1,2-Dichloroethane ND 1.00 1 02/23/2023 08:03 WG2011291 1,1-Dichloroethene ND 1.00 1 02/23/2023 08:03 WG2011291 cis-1,2-Dichloroethene ND 1.00 1 02/23/2023 08:03 WG2011291 trans-1,2-Dichloroethene ND 1.00 1 02/23/2023 08:03 WG2011291 1,2-Dichloropropane ND 1.00 1 02/23/2023 08:03 WG2011291 1,1-Dichloropropene ND 1.00 1 02/23/2023 08:03 WG2011291 1,3-Dichloropropane ND 1.00 1 02/23/2023 08:03 WG2011291 2,2-Dichloropropane ND J3 1.00 1 02/23/2023 08:03 WG2011291 Di-isopropyl ether ND 1.00 1 02/23/2023 08:03 WG2011291 Ethylbenzene ND 1.00 1 02/23/2023 08:03 WG2011291 Hexachloro-1,3-butadiene ND 1.00 1 02/23/2023 08:03 WG2011291 Isopropylbenzene ND 1.00 1 02/23/2023 08:03 WG2011291 p-Isopropyltoluene ND 1.00 1 02/23/2023 08:03 WG2011291 2-Butanone (MEK)ND 10.0 1 02/23/2023 08:03 WG2011291 Methylene Chloride ND 5.00 1 02/23/2023 08:03 WG2011291 4-Methyl-2-pentanone (MIBK) ND 10.0 1 02/23/2023 08:03 WG2011291 Methyl tert-butyl ether ND 1.00 1 02/23/2023 08:03 WG2011291 Naphthalene ND 5.00 1 02/23/2023 08:03 WG2011291 n-Propylbenzene ND 1.00 1 02/23/2023 08:03 WG2011291 Styrene ND 1.00 1 02/23/2023 08:03 WG2011291 1,1,1,2-Tetrachloroethane ND 1.00 1 02/23/2023 08:03 WG2011291 1,1,2,2-Tetrachloroethane ND J3 1.00 1 02/23/2023 08:03 WG2011291 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 28 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 28 of 48 SAMPLE RESULTS - 12 L1586583 DOWNGRADIENT Collected date/time: 02/15/23 00:00 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 Result Qualifier RDL Dilution Analysis Batch Analyte ug/l ug/l date / time Tetrachloroethene ND 1.00 1 02/23/2023 08:03 WG2011291 Toluene ND 1.00 1 02/23/2023 08:03 WG2011291 1,2,3-Trichlorobenzene ND 1.00 1 02/23/2023 08:03 WG2011291 1,2,4-Trichlorobenzene ND 1.00 1 02/23/2023 08:03 WG2011291 1,1,1-Trichloroethane ND 1.00 1 02/23/2023 08:03 WG2011291 1,1,2-Trichloroethane ND 1.00 1 02/23/2023 08:03 WG2011291 Trichloroethene ND 1.00 1 02/23/2023 08:03 WG2011291 Trichlorofluoromethane ND 5.00 1 02/23/2023 08:03 WG2011291 1,2,3-Trichloropropane ND 2.50 1 02/23/2023 08:03 WG2011291 1,2,4-Trimethylbenzene ND 1.00 1 02/23/2023 08:03 WG2011291 1,3,5-Trimethylbenzene ND 1.00 1 02/23/2023 08:03 WG2011291 Vinyl chloride ND 1.00 1 02/23/2023 08:03 WG2011291 o-Xylene ND 1.00 1 02/23/2023 08:03 WG2011291 m&p-Xylenes ND 2.00 1 02/23/2023 08:03 WG2011291 Ethanol ND 100 1 02/23/2023 12:17 WG2011484 Ethyl tert-butyl ether ND 1.00 1 02/23/2023 08:03 WG2011291 t-Amyl Alcohol ND 50.0 1 02/23/2023 08:03 WG2011291 tert-Butyl alcohol ND 5.00 1 02/23/2023 08:03 WG2011291 tert-Amyl Methyl Ether ND 1.00 1 02/23/2023 08:03 WG2011291 (S) Toluene-d8 106 80.0-120 02/23/2023 08:03 WG2011291 (S) Toluene-d8 114 80.0-120 02/23/2023 12:17 WG2011484 (S) 4-Bromofluorobenzene 103 77.0-126 02/23/2023 08:03 WG2011291 (S) 4-Bromofluorobenzene 110 77.0-126 02/23/2023 12:17 WG2011484 (S) 1,2-Dichloroethane-d4 108 70.0-130 02/23/2023 08:03 WG2011291 (S) 1,2-Dichloroethane-d4 101 70.0-130 02/23/2023 12:17 WG2011484 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 29 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 29 of 48 QUALITY CONTROL SUMMARYWG2008116 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 L1586583-01,02,03,04,05,06,07,08,09 Method Blank (MB) (MB) R3893466-3 02/17/23 13:23 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l Acetone U 11.3 50.0 Acrolein U 2.54 50.0 Acrylonitrile U 0.671 10.0 Benzene U 0.0941 1.00 Bromobenzene U 0.118 1.00 Bromodichloromethane U 0.136 1.00 Bromoform U 0.129 1.00 Bromomethane U 0.605 5.00 n-Butylbenzene U 0.157 1.00 sec-Butylbenzene U 0.125 1.00 tert-Butylbenzene U 0.127 1.00 Carbon tetrachloride U 0.128 1.00 Chlorobenzene U 0.116 1.00 Chlorodibromomethane U 0.140 1.00 Chloroethane U 0.192 5.00 Chloroform U 0.111 5.00 Chloromethane U 0.960 2.50 2-Chlorotoluene U 0.106 1.00 4-Chlorotoluene U 0.114 1.00 1,2-Dibromo-3-Chloropropane U 0.276 5.00 1,2-Dibromoethane U 0.126 1.00 Dibromomethane U 0.122 1.00 1,2-Dichlorobenzene U 0.107 1.00 1,3-Dichlorobenzene U 0.110 1.00 1,4-Dichlorobenzene U 0.120 1.00 Dichlorodifluoromethane U 0.374 5.00 1,1-Dichloroethane U 0.100 1.00 1,2-Dichloroethane U 0.0819 1.00 1,1-Dichloroethene U 0.188 1.00 cis-1,2-Dichloroethene U 0.126 1.00 trans-1,2-Dichloroethene U 0.149 1.00 1,2-Dichloropropane U 0.149 1.00 1,1-Dichloropropene U 0.142 1.00 1,3-Dichloropropane U 0.110 1.00 2,2-Dichloropropane U 0.161 1.00 Di-isopropyl ether U 0.105 1.00 Ethylbenzene U 0.137 1.00 Hexachloro-1,3-butadiene U 0.337 1.00 Isopropylbenzene U 0.105 1.00 p-Isopropyltoluene U 0.120 1.00 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 30 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 30 of 48 QUALITY CONTROL SUMMARYWG2008116 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 L1586583-01,02,03,04,05,06,07,08,09 Method Blank (MB) (MB) R3893466-3 02/17/23 13:23 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l 2-Butanone (MEK)U 1.19 10.0 Methylene Chloride U 0.430 5.00 4-Methyl-2-pentanone (MIBK) U 0.478 10.0 Methyl tert-butyl ether U 0.101 1.00 Naphthalene U 1.00 5.00 n-Propylbenzene U 0.0993 1.00 Styrene U 0.118 1.00 1,1,1,2-Tetrachloroethane U 0.147 1.00 1,1,2,2-Tetrachloroethane U 0.133 1.00 Tetrachloroethene U 0.300 1.00 Toluene U 0.278 1.00 1,2,3-Trichlorobenzene U 0.230 1.00 1,2,4-Trichlorobenzene U 0.481 1.00 1,1,1-Trichloroethane U 0.149 1.00 1,1,2-Trichloroethane U 0.158 1.00 Trichloroethene U 0.190 1.00 Trichlorofluoromethane U 0.160 5.00 1,2,3-Trichloropropane U 0.237 2.50 1,2,4-Trimethylbenzene U 0.322 1.00 1,3,5-Trimethylbenzene U 0.104 1.00 Vinyl chloride U 0.234 1.00 o-Xylene U 0.174 1.00 m&p-Xylene U 0.430 2.00 Ethyl tert-butyl ether U 0.101 1.00 t-Amyl Alcohol U 4.90 50.0 tert-Butyl alcohol U 4.06 5.00 tert-Amyl Methyl Ether U 0.195 1.00 (S) Toluene-d8 104 80.0-120 (S) 4-Bromofluorobenzene 97.8 77.0-126 (S) 1,2-Dichloroethane-d4 109 70.0-130 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3893466-1 02/17/23 12:00 • (LCSD) R3893466-2 02/17/23 12:21 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l %%%%% Acetone 25.0 28.1 30.8 112 123 19.0-160 9.17 27 Acrolein 25.0 23.1 28.7 92.4 115 10.0-160 21.6 26 Acrylonitrile 25.0 26.8 28.9 107 116 55.0-149 7.54 20 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 31 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 31 of 48 QUALITY CONTROL SUMMARYWG2008116 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 L1586583-01,02,03,04,05,06,07,08,09 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3893466-1 02/17/23 12:00 • (LCSD) R3893466-2 02/17/23 12:21 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l %%%%% Benzene 5.00 5.43 5.68 109 114 70.0-123 4.50 20 Bromobenzene 5.00 5.48 5.68 110 114 73.0-121 3.58 20 Bromodichloromethane 5.00 5.37 5.51 107 110 75.0-120 2.57 20 Bromoform 5.00 4.93 5.07 98.6 101 68.0-132 2.80 20 Bromomethane 5.00 4.41 4.77 88.2 95.4 10.0-160 7.84 25 n-Butylbenzene 5.00 4.98 5.24 99.6 105 73.0-125 5.09 20 sec-Butylbenzene 5.00 5.02 5.20 100 104 75.0-125 3.52 20 tert-Butylbenzene 5.00 5.35 5.51 107 110 76.0-124 2.95 20 Carbon tetrachloride 5.00 5.30 5.68 106 114 68.0-126 6.92 20 Chlorobenzene 5.00 5.24 5.37 105 107 80.0-121 2.45 20 Chlorodibromomethane 5.00 5.15 5.24 103 105 77.0-125 1.73 20 Chloroethane 5.00 5.00 5.24 100 105 47.0-150 4.69 20 Chloroform 5.00 5.56 5.61 111 112 73.0-120 0.895 20 Chloromethane 5.00 4.26 4.35 85.2 87.0 41.0-142 2.09 20 2-Chlorotoluene 5.00 5.90 5.87 118 117 76.0-123 0.510 20 4-Chlorotoluene 5.00 5.39 5.51 108 110 75.0-122 2.20 20 1,2-Dibromo-3-Chloropropane 5.00 4.75 5.06 95.0 101 58.0-134 6.32 20 1,2-Dibromoethane 5.00 4.99 5.10 99.8 102 80.0-122 2.18 20 Dibromomethane 5.00 5.55 5.61 111 112 80.0-120 1.08 20 1,2-Dichlorobenzene 5.00 5.21 5.31 104 106 79.0-121 1.90 20 1,3-Dichlorobenzene 5.00 5.36 5.44 107 109 79.0-120 1.48 20 1,4-Dichlorobenzene 5.00 5.42 5.56 108 111 79.0-120 2.55 20 Dichlorodifluoromethane 5.00 4.69 5.09 93.8 102 51.0-149 8.18 20 1,1-Dichloroethane 5.00 5.46 5.48 109 110 70.0-126 0.366 20 1,2-Dichloroethane 5.00 5.60 5.75 112 115 70.0-128 2.64 20 1,1-Dichloroethene 5.00 5.11 5.29 102 106 71.0-124 3.46 20 cis-1,2-Dichloroethene 5.00 5.31 5.34 106 107 73.0-120 0.563 20 trans-1,2-Dichloroethene 5.00 5.41 5.52 108 110 73.0-120 2.01 20 1,2-Dichloropropane 5.00 5.54 5.67 111 113 77.0-125 2.32 20 1,1-Dichloropropene 5.00 5.08 5.33 102 107 74.0-126 4.80 20 1,3-Dichloropropane 5.00 5.13 5.31 103 106 80.0-120 3.45 20 2,2-Dichloropropane 5.00 5.26 5.97 105 119 58.0-130 12.6 20 Di-isopropyl ether 5.00 5.43 5.56 109 111 58.0-138 2.37 20 Ethylbenzene 5.00 5.10 5.26 102 105 79.0-123 3.09 20 Hexachloro-1,3-butadiene 5.00 4.77 4.79 95.4 95.8 54.0-138 0.418 20 Isopropylbenzene 5.00 5.08 5.16 102 103 76.0-127 1.56 20 p-Isopropyltoluene 5.00 5.10 5.36 102 107 76.0-125 4.97 20 2-Butanone (MEK)25.0 27.6 27.8 110 111 44.0-160 0.722 20 Methylene Chloride 5.00 5.36 5.36 107 107 67.0-120 0.000 20 4-Methyl-2-pentanone (MIBK) 25.0 26.6 27.7 106 111 68.0-142 4.05 20 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 32 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 32 of 48 QUALITY CONTROL SUMMARYWG2008116 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 L1586583-01,02,03,04,05,06,07,08,09 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3893466-1 02/17/23 12:00 • (LCSD) R3893466-2 02/17/23 12:21 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l %%%%% Methyl tert-butyl ether 5.00 5.39 5.50 108 110 68.0-125 2.02 20 Naphthalene 5.00 4.36 4.53 87.2 90.6 54.0-135 3.82 20 n-Propylbenzene 5.00 5.35 5.64 107 113 77.0-124 5.28 20 Styrene 5.00 5.04 5.17 101 103 73.0-130 2.55 20 1,1,1,2-Tetrachloroethane 5.00 5.22 5.34 104 107 75.0-125 2.27 20 1,1,2,2-Tetrachloroethane 5.00 4.92 5.50 98.4 110 65.0-130 11.1 20 Tetrachloroethene 5.00 4.94 5.23 98.8 105 72.0-132 5.70 20 Toluene 5.00 5.12 5.24 102 105 79.0-120 2.32 20 1,2,3-Trichlorobenzene 5.00 4.54 4.62 90.8 92.4 50.0-138 1.75 20 1,2,4-Trichlorobenzene 5.00 4.69 4.69 93.8 93.8 57.0-137 0.000 20 1,1,1-Trichloroethane 5.00 5.25 5.37 105 107 73.0-124 2.26 20 1,1,2-Trichloroethane 5.00 5.13 5.30 103 106 80.0-120 3.26 20 Trichloroethene 5.00 5.47 5.40 109 108 78.0-124 1.29 20 Trichlorofluoromethane 5.00 5.18 5.52 104 110 59.0-147 6.36 20 1,2,3-Trichloropropane 5.00 5.50 5.55 110 111 73.0-130 0.905 20 1,2,4-Trimethylbenzene 5.00 5.31 5.49 106 110 76.0-121 3.33 20 1,3,5-Trimethylbenzene 5.00 5.48 5.72 110 114 76.0-122 4.29 20 Vinyl chloride 5.00 4.10 4.40 82.0 88.0 67.0-131 7.06 20 o-Xylene 5.00 5.16 5.20 103 104 80.0-122 0.772 20 m&p-Xylene 10.0 10.4 10.6 104 106 80.0-122 1.90 20 Ethyl tert-butyl ether 5.00 5.36 5.57 107 111 63.0-138 3.84 20 tert-Butyl alcohol 25.0 24.4 26.5 97.6 106 27.0-160 8.25 30 tert-Amyl Methyl Ether 5.00 5.19 5.34 104 107 66.0-125 2.85 20 (S) Toluene-d8 103 103 80.0-120 (S) 4-Bromofluorobenzene 96.6 95.5 77.0-126 (S) 1,2-Dichloroethane-d4 110 109 70.0-130 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 33 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 33 of 48 QUALITY CONTROL SUMMARYWG2011291 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 L1586583-11,12 Method Blank (MB) (MB) R3893930-3 02/22/23 21:48 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l Acetone U 11.3 50.0 Acrolein U 2.54 50.0 Acrylonitrile U 0.671 10.0 Benzene U 0.0941 1.00 Bromobenzene U 0.118 1.00 Bromodichloromethane U 0.136 1.00 Bromoform U 0.129 1.00 Bromomethane U 0.605 5.00 n-Butylbenzene U 0.157 1.00 sec-Butylbenzene U 0.125 1.00 tert-Butylbenzene U 0.127 1.00 Carbon tetrachloride U 0.128 1.00 Chlorobenzene U 0.116 1.00 Chlorodibromomethane U 0.140 1.00 Chloroethane U 0.192 5.00 Chloroform U 0.111 5.00 2-Chlorotoluene U 0.106 1.00 4-Chlorotoluene U 0.114 1.00 1,2-Dibromo-3-Chloropropane U 0.276 5.00 1,2-Dibromoethane U 0.126 1.00 Dibromomethane U 0.122 1.00 1,2-Dichlorobenzene U 0.107 1.00 1,3-Dichlorobenzene U 0.110 1.00 1,4-Dichlorobenzene U 0.120 1.00 Dichlorodifluoromethane U 0.374 5.00 1,1-Dichloroethane U 0.100 1.00 1,2-Dichloroethane U 0.0819 1.00 1,1-Dichloroethene U 0.188 1.00 cis-1,2-Dichloroethene U 0.126 1.00 trans-1,2-Dichloroethene U 0.149 1.00 1,2-Dichloropropane U 0.149 1.00 1,1-Dichloropropene U 0.142 1.00 1,3-Dichloropropane U 0.110 1.00 2,2-Dichloropropane U 0.161 1.00 Di-isopropyl ether U 0.105 1.00 Ethylbenzene U 0.137 1.00 Hexachloro-1,3-butadiene U 0.337 1.00 Isopropylbenzene U 0.105 1.00 p-Isopropyltoluene U 0.120 1.00 2-Butanone (MEK)U 1.19 10.0 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 34 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 34 of 48 QUALITY CONTROL SUMMARYWG2011291 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 L1586583-11,12 Method Blank (MB) (MB) R3893930-3 02/22/23 21:48 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l Methylene Chloride U 0.430 5.00 4-Methyl-2-pentanone (MIBK) U 0.478 10.0 Methyl tert-butyl ether U 0.101 1.00 Naphthalene U 1.00 5.00 n-Propylbenzene U 0.0993 1.00 Styrene U 0.118 1.00 1,1,1,2-Tetrachloroethane U 0.147 1.00 1,1,2,2-Tetrachloroethane U 0.133 1.00 Tetrachloroethene U 0.300 1.00 Toluene U 0.278 1.00 1,2,3-Trichlorobenzene U 0.230 1.00 1,2,4-Trichlorobenzene U 0.481 1.00 1,1,1-Trichloroethane U 0.149 1.00 1,1,2-Trichloroethane U 0.158 1.00 Trichloroethene U 0.190 1.00 Trichlorofluoromethane U 0.160 5.00 1,2,3-Trichloropropane U 0.237 2.50 1,2,4-Trimethylbenzene U 0.322 1.00 1,3,5-Trimethylbenzene U 0.104 1.00 Vinyl chloride U 0.234 1.00 o-Xylene U 0.174 1.00 m&p-Xylenes U 0.430 2.00 Ethyl tert-butyl ether U 0.101 1.00 t-Amyl Alcohol U 4.90 50.0 tert-Butyl alcohol U 4.06 5.00 tert-Amyl Methyl Ether U 0.195 1.00 (S) Toluene-d8 109 80.0-120 (S) 4-Bromofluorobenzene 106 77.0-126 (S) 1,2-Dichloroethane-d4 100 70.0-130 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3893930-1 02/22/23 20:47 • (LCSD) R3893930-2 02/22/23 21:07 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l %%%%% Acetone 25.0 25.9 25.4 104 102 19.0-160 1.95 27 Acrolein 25.0 23.9 18.2 95.6 72.8 10.0-160 J3 27.1 26 Acrylonitrile 25.0 28.2 26.5 113 106 55.0-149 6.22 20 Benzene 5.00 5.14 4.97 103 99.4 70.0-123 3.36 20 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 35 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 35 of 48 QUALITY CONTROL SUMMARYWG2011291 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 L1586583-11,12 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3893930-1 02/22/23 20:47 • (LCSD) R3893930-2 02/22/23 21:07 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l %%%%% Bromobenzene 5.00 4.92 4.77 98.4 95.4 73.0-121 3.10 20 Bromodichloromethane 5.00 4.87 4.78 97.4 95.6 75.0-120 1.87 20 Bromoform 5.00 5.05 4.70 101 94.0 68.0-132 7.18 20 Bromomethane 5.00 4.78 4.78 95.6 95.6 10.0-160 0.000 25 n-Butylbenzene 5.00 4.78 4.57 95.6 91.4 73.0-125 4.49 20 sec-Butylbenzene 5.00 5.08 4.82 102 96.4 75.0-125 5.25 20 tert-Butylbenzene 5.00 5.03 5.02 101 100 76.0-124 0.199 20 Carbon tetrachloride 5.00 5.26 5.09 105 102 68.0-126 3.29 20 Chlorobenzene 5.00 5.36 5.26 107 105 80.0-121 1.88 20 Chlorodibromomethane 5.00 5.04 5.06 101 101 77.0-125 0.396 20 Chloroethane 5.00 5.08 5.25 102 105 47.0-150 3.29 20 Chloroform 5.00 5.12 4.87 102 97.4 73.0-120 5.01 20 2-Chlorotoluene 5.00 5.08 4.72 102 94.4 76.0-123 7.35 20 4-Chlorotoluene 5.00 4.83 4.72 96.6 94.4 75.0-122 2.30 20 1,2-Dibromo-3-Chloropropane 5.00 5.19 5.13 104 103 58.0-134 1.16 20 1,2-Dibromoethane 5.00 5.45 5.45 109 109 80.0-122 0.000 20 Dibromomethane 5.00 5.08 4.75 102 95.0 80.0-120 6.71 20 1,2-Dichlorobenzene 5.00 5.15 5.00 103 100 79.0-121 2.96 20 1,3-Dichlorobenzene 5.00 4.94 4.78 98.8 95.6 79.0-120 3.29 20 1,4-Dichlorobenzene 5.00 4.85 4.63 97.0 92.6 79.0-120 4.64 20 Dichlorodifluoromethane 5.00 5.12 4.29 102 85.8 51.0-149 17.6 20 1,1-Dichloroethane 5.00 5.02 4.97 100 99.4 70.0-126 1.00 20 1,2-Dichloroethane 5.00 5.28 4.94 106 98.8 70.0-128 6.65 20 1,1-Dichloroethene 5.00 5.35 5.00 107 100 71.0-124 6.76 20 cis-1,2-Dichloroethene 5.00 5.12 5.15 102 103 73.0-120 0.584 20 trans-1,2-Dichloroethene 5.00 5.27 4.81 105 96.2 73.0-120 9.13 20 1,2-Dichloropropane 5.00 5.10 4.90 102 98.0 77.0-125 4.00 20 1,1-Dichloropropene 5.00 5.25 5.11 105 102 74.0-126 2.70 20 1,3-Dichloropropane 5.00 5.58 5.33 112 107 80.0-120 4.58 20 2,2-Dichloropropane 5.00 4.75 3.55 95.0 71.0 58.0-130 J3 28.9 20 Di-isopropyl ether 5.00 4.96 4.84 99.2 96.8 58.0-138 2.45 20 Ethylbenzene 5.00 5.34 5.32 107 106 79.0-123 0.375 20 Hexachloro-1,3-butadiene 5.00 4.72 5.12 94.4 102 54.0-138 8.13 20 Isopropylbenzene 5.00 5.18 5.22 104 104 76.0-127 0.769 20 p-Isopropyltoluene 5.00 5.15 4.86 103 97.2 76.0-125 5.79 20 2-Butanone (MEK)25.0 26.9 26.3 108 105 44.0-160 2.26 20 Methylene Chloride 5.00 5.50 5.23 110 105 67.0-120 5.03 20 4-Methyl-2-pentanone (MIBK) 25.0 27.5 26.6 110 106 68.0-142 3.33 20 Methyl tert-butyl ether 5.00 5.29 5.02 106 100 68.0-125 5.24 20 Naphthalene 5.00 5.16 4.94 103 98.8 54.0-135 4.36 20 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 36 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 36 of 48 QUALITY CONTROL SUMMARYWG2011291 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 L1586583-11,12 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3893930-1 02/22/23 20:47 • (LCSD) R3893930-2 02/22/23 21:07 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l %%%%% n-Propylbenzene 5.00 4.95 4.81 99.0 96.2 77.0-124 2.87 20 Styrene 5.00 4.90 5.12 98.0 102 73.0-130 4.39 20 1,1,1,2-Tetrachloroethane 5.00 5.29 5.15 106 103 75.0-125 2.68 20 1,1,2,2-Tetrachloroethane 5.00 5.02 4.01 100 80.2 65.0-130 J3 22.4 20 Tetrachloroethene 5.00 5.00 5.03 100 101 72.0-132 0.598 20 Toluene 5.00 5.21 5.26 104 105 79.0-120 0.955 20 1,2,3-Trichlorobenzene 5.00 5.68 5.64 114 113 50.0-138 0.707 20 1,2,4-Trichlorobenzene 5.00 4.92 5.03 98.4 101 57.0-137 2.21 20 1,1,1-Trichloroethane 5.00 5.09 4.88 102 97.6 73.0-124 4.21 20 1,1,2-Trichloroethane 5.00 5.39 5.36 108 107 80.0-120 0.558 20 Trichloroethene 5.00 5.56 5.81 111 116 78.0-124 4.40 20 Trichlorofluoromethane 5.00 5.18 5.39 104 108 59.0-147 3.97 20 1,2,3-Trichloropropane 5.00 5.15 4.97 103 99.4 73.0-130 3.56 20 1,2,4-Trimethylbenzene 5.00 4.96 4.92 99.2 98.4 76.0-121 0.810 20 1,3,5-Trimethylbenzene 5.00 5.13 4.79 103 95.8 76.0-122 6.85 20 Vinyl chloride 5.00 5.30 4.88 106 97.6 67.0-131 8.25 20 o-Xylene 5.00 4.98 5.07 99.6 101 80.0-122 1.79 20 m&p-Xylenes 10.0 10.3 10.6 103 106 80.0-122 2.87 20 Ethyl tert-butyl ether 5.00 5.33 5.04 107 101 63.0-138 5.59 20 tert-Butyl alcohol 25.0 31.9 26.2 128 105 27.0-160 19.6 30 tert-Amyl Methyl Ether 5.00 5.18 4.97 104 99.4 66.0-125 4.14 20 (S) Toluene-d8 109 111 80.0-120 (S) 4-Bromofluorobenzene 106 108 77.0-126 (S) 1,2-Dichloroethane-d4 102 102 70.0-130 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 37 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 37 of 48 QUALITY CONTROL SUMMARYWG2011532 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 L1586583-10 Method Blank (MB) (MB) R3894090-3 02/23/23 10:42 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l Acetone U 11.3 50.0 Acrolein U 2.54 50.0 Acrylonitrile U 0.671 10.0 Benzene U 0.0941 1.00 Bromobenzene U 0.118 1.00 Bromodichloromethane U 0.136 1.00 Bromoform U 0.129 1.00 Bromomethane U 0.605 5.00 n-Butylbenzene U 0.157 1.00 sec-Butylbenzene U 0.125 1.00 tert-Butylbenzene U 0.127 1.00 Carbon tetrachloride U 0.128 1.00 Chlorobenzene U 0.116 1.00 Chlorodibromomethane U 0.140 1.00 Chloroethane U 0.192 5.00 Chloroform U 0.111 5.00 Chloromethane U 0.960 2.50 2-Chlorotoluene U 0.106 1.00 4-Chlorotoluene U 0.114 1.00 1,2-Dibromo-3-Chloropropane U 0.276 5.00 1,2-Dibromoethane U 0.126 1.00 Dibromomethane U 0.122 1.00 1,2-Dichlorobenzene U 0.107 1.00 1,3-Dichlorobenzene U 0.110 1.00 1,4-Dichlorobenzene U 0.120 1.00 Dichlorodifluoromethane U 0.374 5.00 1,1-Dichloroethane U 0.100 1.00 1,2-Dichloroethane U 0.0819 1.00 1,1-Dichloroethene U 0.188 1.00 cis-1,2-Dichloroethene U 0.126 1.00 trans-1,2-Dichloroethene U 0.149 1.00 1,2-Dichloropropane U 0.149 1.00 1,1-Dichloropropene U 0.142 1.00 1,3-Dichloropropane U 0.110 1.00 2,2-Dichloropropane U 0.161 1.00 Di-isopropyl ether U 0.105 1.00 Ethylbenzene U 0.137 1.00 Hexachloro-1,3-butadiene U 0.337 1.00 Isopropylbenzene U 0.105 1.00 p-Isopropyltoluene U 0.120 1.00 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 38 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 38 of 48 QUALITY CONTROL SUMMARYWG2011532 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 L1586583-10 Method Blank (MB) (MB) R3894090-3 02/23/23 10:42 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l 2-Butanone (MEK)U 1.19 10.0 Methylene Chloride U 0.430 5.00 4-Methyl-2-pentanone (MIBK) U 0.478 10.0 Methyl tert-butyl ether U 0.101 1.00 Naphthalene U 1.00 5.00 n-Propylbenzene U 0.0993 1.00 Styrene U 0.118 1.00 1,1,1,2-Tetrachloroethane U 0.147 1.00 1,1,2,2-Tetrachloroethane U 0.133 1.00 Tetrachloroethene U 0.300 1.00 Toluene U 0.278 1.00 1,2,3-Trichlorobenzene U 0.230 1.00 1,2,4-Trichlorobenzene U 0.481 1.00 1,1,1-Trichloroethane U 0.149 1.00 1,1,2-Trichloroethane U 0.158 1.00 Trichloroethene U 0.190 1.00 Trichlorofluoromethane U 0.160 5.00 1,2,3-Trichloropropane U 0.237 2.50 1,2,4-Trimethylbenzene U 0.322 1.00 1,3,5-Trimethylbenzene U 0.104 1.00 Vinyl chloride U 0.234 1.00 o-Xylene U 0.174 1.00 m&p-Xylenes U 0.430 2.00 Ethanol U 42.0 100 Ethyl tert-butyl ether U 0.101 1.00 t-Amyl Alcohol U 4.90 50.0 tert-Butyl alcohol U 4.06 5.00 tert-Amyl Methyl Ether U 0.195 1.00 (S) Toluene-d8 114 80.0-120 (S) 4-Bromofluorobenzene 111 77.0-126 (S) 1,2-Dichloroethane-d4 94.4 70.0-130 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3894090-1 02/23/23 08:59 • (LCSD) R3894090-2 02/23/23 09:19 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l %%%%% Acetone 25.0 26.0 28.6 104 114 19.0-160 9.52 27 Acrolein 25.0 27.3 28.6 109 114 10.0-160 4.65 26 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 39 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 39 of 48 QUALITY CONTROL SUMMARYWG2011532 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 L1586583-10 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3894090-1 02/23/23 08:59 • (LCSD) R3894090-2 02/23/23 09:19 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l %%%%% Acrylonitrile 25.0 25.0 28.5 100 114 55.0-149 13.1 20 Benzene 5.00 5.00 5.56 100 111 70.0-123 10.6 20 Bromobenzene 5.00 4.91 5.43 98.2 109 73.0-121 10.1 20 Bromodichloromethane 5.00 5.10 5.58 102 112 75.0-120 8.99 20 Bromoform 5.00 5.18 5.37 104 107 68.0-132 3.60 20 Bromomethane 5.00 6.32 7.02 126 140 10.0-160 10.5 25 n-Butylbenzene 5.00 5.27 6.02 105 120 73.0-125 13.3 20 sec-Butylbenzene 5.00 5.32 6.37 106 127 75.0-125 J4 18.0 20 tert-Butylbenzene 5.00 5.23 5.77 105 115 76.0-124 9.82 20 Carbon tetrachloride 5.00 5.64 5.98 113 120 68.0-126 5.85 20 Chlorobenzene 5.00 5.27 5.75 105 115 80.0-121 8.71 20 Chlorodibromomethane 5.00 5.24 5.86 105 117 77.0-125 11.2 20 Chloroethane 5.00 5.77 5.78 115 116 47.0-150 0.173 20 Chloroform 5.00 5.37 5.44 107 109 73.0-120 1.30 20 Chloromethane 5.00 5.08 5.54 102 111 41.0-142 8.66 20 2-Chlorotoluene 5.00 5.15 5.97 103 119 76.0-123 14.7 20 4-Chlorotoluene 5.00 5.04 5.82 101 116 75.0-122 14.4 20 1,2-Dibromo-3-Chloropropane 5.00 4.54 5.44 90.8 109 58.0-134 18.0 20 1,2-Dibromoethane 5.00 4.98 5.43 99.6 109 80.0-122 8.65 20 Dibromomethane 5.00 5.15 5.70 103 114 80.0-120 10.1 20 1,2-Dichlorobenzene 5.00 5.48 5.70 110 114 79.0-121 3.94 20 1,3-Dichlorobenzene 5.00 5.44 5.98 109 120 79.0-120 9.46 20 1,4-Dichlorobenzene 5.00 5.10 5.94 102 119 79.0-120 15.2 20 Dichlorodifluoromethane 5.00 5.00 5.73 100 115 51.0-149 13.6 20 1,1-Dichloroethane 5.00 5.03 5.55 101 111 70.0-126 9.83 20 1,2-Dichloroethane 5.00 5.21 5.57 104 111 70.0-128 6.68 20 1,1-Dichloroethene 5.00 4.72 5.19 94.4 104 71.0-124 9.49 20 cis-1,2-Dichloroethene 5.00 5.00 5.52 100 110 73.0-120 9.89 20 trans-1,2-Dichloroethene 5.00 5.34 5.68 107 114 73.0-120 6.17 20 1,2-Dichloropropane 5.00 5.07 5.14 101 103 77.0-125 1.37 20 1,1-Dichloropropene 5.00 5.29 5.76 106 115 74.0-126 8.51 20 1,3-Dichloropropane 5.00 5.10 5.38 102 108 80.0-120 5.34 20 2,2-Dichloropropane 5.00 6.09 6.26 122 125 58.0-130 2.75 20 Di-isopropyl ether 5.00 5.03 5.33 101 107 58.0-138 5.79 20 Ethylbenzene 5.00 5.39 6.09 108 122 79.0-123 12.2 20 Hexachloro-1,3-butadiene 5.00 5.95 5.47 119 109 54.0-138 8.41 20 Isopropylbenzene 5.00 5.29 5.81 106 116 76.0-127 9.37 20 p-Isopropyltoluene 5.00 5.24 6.07 105 121 76.0-125 14.7 20 2-Butanone (MEK)25.0 25.0 26.9 100 108 44.0-160 7.32 20 Methylene Chloride 5.00 5.42 5.55 108 111 67.0-120 2.37 20 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 40 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 40 of 48 QUALITY CONTROL SUMMARYWG2011532 Volatile Organic Compounds (GC/MS) by Method 6200B-1997/6200B-2011 L1586583-10 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3894090-1 02/23/23 08:59 • (LCSD) R3894090-2 02/23/23 09:19 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l %%%%% 4-Methyl-2-pentanone (MIBK) 25.0 26.8 30.0 107 120 68.0-142 11.3 20 Methyl tert-butyl ether 5.00 5.07 5.38 101 108 68.0-125 5.93 20 Naphthalene 5.00 4.11 4.86 82.2 97.2 54.0-135 16.7 20 n-Propylbenzene 5.00 5.24 6.12 105 122 77.0-124 15.5 20 Styrene 5.00 5.10 5.59 102 112 73.0-130 9.17 20 1,1,1,2-Tetrachloroethane 5.00 4.94 5.63 98.8 113 75.0-125 13.1 20 1,1,2,2-Tetrachloroethane 5.00 4.96 5.85 99.2 117 65.0-130 16.5 20 Tetrachloroethene 5.00 5.49 6.29 110 126 72.0-132 13.6 20 Toluene 5.00 5.01 5.72 100 114 79.0-120 13.2 20 1,2,3-Trichlorobenzene 5.00 4.57 5.99 91.4 120 50.0-138 J3 26.9 20 1,2,4-Trichlorobenzene 5.00 4.72 5.92 94.4 118 57.0-137 J3 22.6 20 1,1,1-Trichloroethane 5.00 5.59 5.83 112 117 73.0-124 4.20 20 1,1,2-Trichloroethane 5.00 5.13 5.46 103 109 80.0-120 6.23 20 Trichloroethene 5.00 5.45 5.40 109 108 78.0-124 0.922 20 Trichlorofluoromethane 5.00 5.44 5.85 109 117 59.0-147 7.26 20 1,2,3-Trichloropropane 5.00 5.34 5.60 107 112 73.0-130 4.75 20 1,2,4-Trimethylbenzene 5.00 5.32 5.81 106 116 76.0-121 8.81 20 1,3,5-Trimethylbenzene 5.00 5.26 6.06 105 121 76.0-122 14.1 20 Vinyl chloride 5.00 5.32 5.96 106 119 67.0-131 11.3 20 o-Xylene 5.00 5.24 5.94 105 119 80.0-122 12.5 20 m&p-Xylenes 10.0 10.7 12.0 107 120 80.0-122 11.5 20 Ethanol 250 266 269 106 108 10.0-160 1.12 30 Ethyl tert-butyl ether 5.00 5.01 5.50 100 110 63.0-138 9.32 20 tert-Butyl alcohol 25.0 23.6 29.4 94.4 118 27.0-160 21.9 30 tert-Amyl Methyl Ether 5.00 4.96 5.18 99.2 104 66.0-125 4.34 20 (S) Toluene-d8 108 109 80.0-120 (S) 4-Bromofluorobenzene 106 108 77.0-126 (S) 1,2-Dichloroethane-d4 106 103 70.0-130 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 41 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 41 of 48 QUALITY CONTROL SUMMARYWG2011272 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1586583-01,02,03,04,05,06,07,08,09 Method Blank (MB) (MB) R3893972-2 02/22/23 23:04 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l Ethanol U 42.0 100 (S) Toluene-d8 103 80.0-120 (S) 4-Bromofluorobenzene 81.6 77.0-126 (S) 1,2-Dichloroethane-d4 103 70.0-130 Laboratory Control Sample (LCS) (LCS) R3893972-1 02/22/23 21:59 Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte ug/l ug/l %% ethanol 250 288 115 10.0-160 (S) Toluene-d8 104 80.0-120 (S) 4-Bromofluorobenzene 88.4 77.0-126 (S) 1,2-Dichloroethane-d4 90.3 70.0-130 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 42 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 42 of 48 QUALITY CONTROL SUMMARYWG2011484 Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1586583-11,12 Method Blank (MB) (MB) R3894089-3 02/23/23 10:42 MB Result MB Qualifier MB MDL MB RDL Analyte ug/l ug/l ug/l Chloromethane U 0.960 2.50 Ethanol U 42.0 100 (S) Toluene-d8 114 80.0-120 (S) 4-Bromofluorobenzene 111 77.0-126 (S) 1,2-Dichloroethane-d4 94.4 70.0-130 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3894089-1 02/23/23 08:59 • (LCSD) R3894089-2 02/23/23 09:19 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l %%%%% Chloromethane 5.00 5.08 5.54 102 111 41.0-142 8.66 20 ethanol 250 266 269 106 108 10.0-160 1.12 30 (S) Toluene-d8 108 109 80.0-120 (S) 4-Bromofluorobenzene 106 108 77.0-126 (S) 1,2-Dichloroethane-d4 106 103 70.0-130 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 43 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 43 of 48 GLOSSARY OF TERMS Guide to Reading and Understanding Your Laboratory Report The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not intended as a comprehensive explanation, and if you have additional questions please contact your project representative. Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name, Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received. Abbreviations and Definitions MDL Method Detection Limit. ND Not detected at the Reporting Limit (or MDL where applicable). RDL Reported Detection Limit. Rec.Recovery. RPD Relative Percent Difference. SDG Sample Delivery Group. (S) Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be detected in all environmental media. U Not detected at the Reporting Limit (or MDL where applicable). Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes reported. Dilution If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the result reported has already been corrected for this factor. Limits These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or duplicated within these ranges. Qualifier This column provides a letter and/or number designation that corresponds to additional information concerning the result reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable. Result The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL” (Below Detectable Levels). The information in the results column should always be accompanied by either an MDL (Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect or report for this analyte. Uncertainty (Radiochemistry)Confidence level of 2 sigma. Case Narrative (Cn) A brief discussion about the included sample results, including a discussion of any non-conformances to protocol observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report. Quality Control Summary (Qc) This section of the report includes the results of the laboratory quality control analyses required by procedure or analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not being performed on your samples typically, but on laboratory generated material. Sample Chain of Custody (Sc) This is the document created in the field when your samples were initially collected. This is used to verify the time and date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the samples from the time of collection until delivery to the laboratory for analysis. Sample Results (Sr) This section of your report will provide the results of all testing performed on your samples. These results are provided by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for each sample will provide the name and method number for the analysis reported. Sample Summary (Ss)This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and times of preparation and/or analysis. Qualifier Description J3 The associated batch QC was outside the established quality control range for precision. J4 The associated batch QC was outside the established quality control range for accuracy. 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 44 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 44 of 48 Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 Alabama 40660 Nebraska NE-OS-15-05 Alaska 17-026 Nevada TN000032021-1 Arizona AZ0612 New Hampshire 2975 Arkansas 88-0469 New Jersey–NELAP TN002 California 2932 New Mexico ¹TN00003 Colorado TN00003 New York 11742 Connecticut PH-0197 North Carolina Env375 Florida E87487 North Carolina ¹DW21704 Georgia NELAP North Carolina ³41 Georgia ¹923 North Dakota R-140 Idaho TN00003 Ohio–VAP CL0069 Illinois 200008 Oklahoma 9915 Indiana C-TN-01 Oregon TN200002 Iowa 364 Pennsylvania 68-02979 Kansas E-10277 Rhode Island LAO00356 Kentucky ¹ ⁶KY90010 South Carolina 84004002 Kentucky ²16 South Dakota n/a Louisiana AI30792 Tennessee ¹ ⁴2006 Louisiana LA018 Texas T104704245-20-18 Maine TN00003 Texas ⁵LAB0152 Maryland 324 Utah TN000032021-11 Massachusetts M-TN003 Vermont VT2006 Michigan 9958 Virginia 110033 Minnesota 047-999-395 Washington C847 Mississippi TN00003 West Virginia 233 Missouri 340 Wisconsin 998093910 Montana CERT0086 Wyoming A2LA A2LA – ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789 A2LA – ISO 17025 ⁵1461.02 DOD 1461.01 Canada 1461.01 USDA P330-15-00234 EPA–Crypto TN00003 ACCREDITATIONS & LOCATIONS ¹ Drinking Water ² Underground Storage Tanks ³ Aquatic Toxicity ⁴ Chemical/Microbiological ⁵ Mold ⁶ Wastewater n/a Accreditation not applicable * Not all certifications held by the laboratory are applicable to the results reported in the attached report. * Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace Analytical. 1 Cp 2Tc 3Ss 4Cn 5Sr 6Qc 7Gl 8Al 9Sc ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:01 45 of 48 ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: EHC, Inc.ZK-0420 L1586583 02/23/23 16:18 45 of 48