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Home My WebLink About24002_Sherwin Williams Soil Gas Sampling Report 20201217 VERIFICATION SOIL GAS SAMPLING REPORT FORMER SHERWIN WILLIAMS BROWNFIELDS PROPERTY CENTRAL AVENUE AND PECAN AVENUE CHARLOTTE, MECKLENBURG COUNTY, NORTH CAROLINA BROWNFIELDS PROJECT ID. 24002-20-060 ECS PROJECT NO. 49:10756-E PREPARED FOR TGACSE CENTRAL SQUARE, LLC. DECEMBER 17, 2020 Verification Soil Gas Sampling Report Former Sherwin Williams Brownfields Property Charlotte, Mecklenburg County, North Carolina Brownfields Project Number 24002-20-060 ECS Project No. 49:10756-E December 17, 2020 1 TABLE OF CONTENTS 1.0 PROJECT INFORMATION ..................................................................................................... 2 2.0 PREVIOUS INVESTIGATIONS .............................................................................................. 2 3.0 OBJECTIVE OF THE ASSESSMENT .................................................................................... 4 4.0 SAMPLE COLLECTION ......................................................................................................... 5 Soil Gas Samples ..................................................................................................................... 5 5.0 RESULTS ............................................................................................................................... 6 Soil Gas Analysis ...................................................................................................................... 6 6.0 CONCLUSIONS ..................................................................................................................... 6 7.0 RECOMMENDATIONS .......................................................................................................... 7 FIGURES Figure 1 Site Topographic Location Map Figure 2 Site Location Map Figure 3 Verification Soil Gas Sample Location Map TABLES Table 1 Summary of Soil Gas Analytical Results APPENDICES Appendix A Laboratory Analytical Report Verification Soil Gas Sampling Report Former Sherwin Williams Brownfields Property Charlotte, Mecklenburg County, North Carolina Brownfields Project Number 24002-20-060 ECS Project No. 49:10756-E December 17, 2020 2 1.0 PROJECT INFORMATION The Brownfields Property is an approximately 12-acres of land located at the southwest corner of Pecan Avenue and Central Avenue in Charlotte, Mecklenburg County, North Carolina. According to the Mecklenburg Property Ownership and Land Records Site (POLARIS), the Brownfields Property consists of parcel numbers: 08117722 (4.545 acres); 08117723 (6.320 acres); and 08117724A/08117724B (1.145 acres) and is currently owned by Prospective Developer TGACSE Central Square, LLC. A topographic map of the Brownfields Property area is included as Figure 1 and an aerial of the Brownfields Property area and approximate parcel boundaries is included as Figure 2. The site is currently occupied by various commercial businesses, restaurants, offices, and associated parking and drive areas. 2.0 PREVIOUS INVESTIGATIONS ECS previously conducted multiple environmental assessments at the site. Previous assessment activities conducted on the various parcels include the following: • EDR Radius Map Summary and Limited Historical Search (EDR Summary Report), prepared by ECS and dated January 3, 2020. • Phase I Environmental Site Assessment (Phase I ESA), prepared by ECS and dated January 27, 2020. • Report of Limited Environmental Assessment, prepared by ECS and dated February 19, 2020. • Standard Operating & Environmental Procedures for Meineke Car Care Center, prepared by ECS and dated March 30, 2020. • Brownfields Assessment Report & Receptor Survey, prepared by ECS and dated September 29, 2020. ECS also reviewed: • Portions of a Report of Phase II Environmental Site Assessment dated November 3, 1999 that was conducted prior to development of the CVS Pharmacy. • A letter of No Further Action (NFA) dated May 12, 1999 for an underground storage tank (UST) closure at the former Sunoco Station located at 1231 Pecan Avenue (current CVS Pharmacy). • An additional NFA letter dated September 27, 1999 for the risk-based closure of a UST at the former Sherwin Williams site. Both NFA letters were sent by the North Carolina Department of Environment and Natural Resources (NCDENR, currently the North Carolina Department of Environmental Quality or NCDEQ). Based on the results of the EDR Summary Report and the Phase I ESA, the below Recognized Environmental Conditions (RECs) were identified, associated with the site: • Former onsite Cole Manufacturing facility; • Former onsite gasoline station at southeast portion of the site; Verification Soil Gas Sampling Report Former Sherwin Williams Brownfields Property Charlotte, Mecklenburg County, North Carolina Brownfields Project Number 24002-20-060 ECS Project No. 49:10756-E December 17, 2020 3 • Former offsite drycleaner facility listed at 1209 Pecan Avenue; and • Historical and ongoing operations at onsite Meineke Car Care Center. Although not considered to be RECs of the site due to receiving the above referenced NFA letters, the following Historical Recognized Environmental Concerns (HRECs) were identified: • Former onsite 500-gallon UST used by the former Sherwin Williams facility, which was removed and received the NFA. • The seven former onsite USTs from the former gasoline station that were removed and received the NFA (current CVS Pharmacy location). Also, after the completion of the Phase I ESA, ECS reviewed the information in the portions of the Report of Phase II Environmental Site Assessment that was conducted for the CVS site prior to its development as well as the information pertaining to the NFA at the Former Sherwin Williams site. According to those documents, in addition to the petroleum UST detections that received the NFA, a chlorinated solvent (tetrachloroethene or PCE) was detected in one soil sample and one groundwater sample (the exact location(s) are not confirmed). The PCE in the groundwater sample exceeded the NCAC 2L Groundwater Quality Standard. Based on these identified RECs and the additional PCE detections, ECS conducted the referenced Limited Environmental Assessment activities that included the collection of 4 soil samples and 7 groundwater samples in various areas of the Brownfields Property. The soil samples were submitted for laboratory analysis of total petroleum hydrocarbons (TPH) gasoline and diesel range organics (GRO/DRO), volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs), total RCRA metals, and hexavalent chromium. Results of soil sampling did not identify VOCs or SVOCs at concentrations above their respective Preliminary Soil Remedial Goals (PSRGs); however, select metals were detected at concentrations greater than residential PSRGs in the four samples and greater than the soil-to-water PSRG in one of the samples. Additionally, hexavalent chromium was detected in one sample at a concentration that was greater than the residential PSRG. The groundwater samples were submitted for laboratory analysis of VOCs, SVOC, and total RCRA metals. Results of the groundwater analysis identified chromium in two samples and bromodichloromethane in one sample at concentrations greater than their respective NCAC 2L Groundwater Quality Standards. ECS completed a Brownfields Assessment at the property which included the collection of soil, groundwater, and soil gas samples at the site. Four of the soil gas samples detected 1,3-butadiene at estimated concentrations exceeding the Residential Vapor Intrusion Screening Level. As discussed in the Brownfields Assessment Report, based on a review of the laboratory reports, and available information regarding potential sources of 1,3-butadiene, it was concluded that the detections may be false positives and not indicative of site conditions. In an effort to verify the presence or absence of 1,3-butadiene within the subsurface at the site, a work plan addendum was prepared and submitted on October 23, 2020 to collect additional soil gas samples in the vicinity of the previous sample locations with 1,3-butadiene detections. Additionally, a soil gas sample will be collected in the vicinity of a soil sample collected during the Brownfields assessment which has detections of PCE and trichloroethylene (TCE) at concentrations above the Protection of Groundwater PSRGs but below the Residential PSRGs. After review of the work plan addendum, the NCDEQ, Brownfields requested the following changes be made, and Verification Soil Gas Sampling Report Former Sherwin Williams Brownfields Property Charlotte, Mecklenburg County, North Carolina Brownfields Project Number 24002-20-060 ECS Project No. 49:10756-E December 17, 2020 4 resubmitted for final approval: • Move proposed soil gas sample point SG-10 slightly west so that it is within the footprint of the proposed development; • In addition to reporting 1,3-butadiene in proposed verification soil gas sample SG-1A, also report TCE and PCE since they were detected in the initial soil gas sample SG-1, but both concentrations were less than their respective residential sub-slab and exterior vapor intrusion screening level; and, • Recommend allowing 1 to 2 days after installation of the soil gas sample points prior to sampling in an effort to allow the sample points to better equilibrate and/or give more time for potential 1,3-butadience generated during installation to dissipate. As such, the work plan addendum was revised, submitted, and approved by NCDEQ, Brownfields on November 6, 2020. In the approval of the work plan addendum, NCDEQ, Brownfields requested that each of the soil gas samples be analyzed for VOCs by method TO-15 as opposed to the select compounds. 3.0 OBJECTIVE OF THE ASSESSMENT The objective of the assessment was to assess the validity of the previous 1,3-butadiene detections in the soil gas samples SG-1, SG-3, SG-4, and SG-5, and further assess soil gas in the vicinity of the soil boring which had detections of PCE and TCE in the previous assessment by conducting the following sampling activities: • The collection of five (5) soil gas samples (SG-1A, SG-3A, SG-4A, SG-5A, and SG-10) on the Brownfields Property in the vicinity of the previous 1,3-butadiene detections in soil gas and PCE/TCE detections in soil. The soil gas samples collected were submitted for laboratory analysis of VOCs by EPA Method TO-15. The soil gas sampling was conducted in accordance with the Brownfields Assessment Work Plan Addendum, Rev. 1 (Work Plan) prepared by ECS (ECS Project No. 49:10756-E) dated October 27, 2020 and approved by the NCDEQ Brownfields on November 6, 2020. The attached Figure 3 indicates the locations of the samples. During the assessment activities, it was noted that the sample locations included within the Brownfields Assessment Report and work plan were slightly mis-located. As such, the sample locations shown on Figure 3 have been corrected to indicate the accurate locations of the previous and verification samples. This assessment was also conducted in general accordance with the North Carolina Division of Waste Management’s (NCDWM) Inactive Hazardous Site Program’s Guidelines for Assessment and Cleanup of Contaminated Sites (January 2020). Verification Soil Gas Sampling Report Former Sherwin Williams Brownfields Property Charlotte, Mecklenburg County, North Carolina Brownfields Project Number 24002-20-060 ECS Project No. 49:10756-E December 17, 2020 5 4.0 SAMPLE COLLECTION Soil Gas Samples Number and Sample Location ECS collected five (5) soil gas samples (SG-1A, SG-3A, SG-4A, SG-5A, and SG-10) on the Brownfields Property in the vicinity of the previous 1,3-butadiene detections in soil gas and PCE/TCE detections in soil. The approximate locations of the samples are shown on Figure 3. Soil Gas Sample Collection On November 5, 2020, the shallow soil gas sampling probes were installed to a depth of 6 feet bgs in borings advanced using the DPT. Once the boring reached the desired depth, a dedicated Nylaflow tubing and air stone was lowered into the boring. Approximately one foot of clean coarse sand was placed around and above the air stone and a bentonite seal filled the remaining annular space and hydrated (5 feet of seal). The soil gas probes were allowed to stabilize for a minimum of 24 hours before the soil gas samples were collected. A dedicated syringe was used at each sample location and connected to the tubing to purge the tubing. Three volumes of the tubing was purged prior to sample collection. Prior to collecting the soil gas samples, laboratory grade helium gas was used as a QA/QC measure to confirm the integrity of the probe seal at each sample location. A shroud that encloses the fittings and sample train was placed over the newly installed vapor point and filled with helium. The sample tubing and tracer gas tubing was placed through the shroud wall via rubber grommets. During the purging stage, the cylinder was flooded with laboratory grade helium via the hose placed through the shroud wall. A Model MGD-2002 Multi-Gas Leak detector was connected to the probe tube and the air stream being purged was measured for helium. A helium concentration of less than ten percent helium detected within the shroud was considered acceptable. If concentrations greater than ten percent helium were measured, the work plan indicated that the soil gas probes would be reset. In addition to the leak check, a shut-in test was conducted to assess for leaks in the fittings and regulator. Following purging, the vapor point was connected to a 1 liter Summa canister, which was used to collect the sample. The Summa canister was fitted with a flow regulator. The flow rate for sample collection was 0.2 liters per minute. The vacuum in the canister was recorded before and after sample collection. Sample collection was stopped when the vacuum reached approximately 5 inches of Hg. Other parameters that were measured include ambient temperature and weather conditions at the time of sample collection. Sample Analysis Following sample collection, the canisters were labeled and maintained under chain-of-custody until delivered to H&P Mobile Geochemistry Inc., located in Carlsbad, California. A Chain-of-Custody document was utilized throughout the collection and transport of the samples. In accordance with the approved Work Plan and follow up email from Mr. Bill Schmithorst of the NCDEQ, Brownfields on November 6, 2020, each sample was analyzed for VOCs using EPA Method TO-15. The laboratory results were reported at or below the residential and Verification Soil Gas Sampling Report Former Sherwin Williams Brownfields Property Charlotte, Mecklenburg County, North Carolina Brownfields Project Number 24002-20-060 ECS Project No. 49:10756-E December 17, 2020 6 commercial/industrial vapor intrusion screening levels (VISL) and J Flags were reported, if detected. For QA/QC purposes, one duplicate sample (SG-DUP) was collected from soil gas point SG-1A and analyzed for the same compounds using EPA Method TO-15. 5.0 RESULTS Soil Gas Analysis Laboratory analysis of the soil gas samples collected identified several VOCs at concentrations greater than the laboratory method detection limits, but less than their respective Residential and Non-Residential VISLs. Additionally, 1,3-butadiene was not detected at concentrations above the method detection limits in the soil gas samples collected. A summary of the soil gas sample analytical results is included as Table 1 and the laboratory report is included as Appendix A. Risk Calculator ECS input the results of the soil gas samples collected into the NCDEQ Risk Calculator (July 2020 Version). The results of the risk calculators for each sample did not identify a vapor intrusion risk for residents or non-residential workers. Quality Control One duplicate soil gas sample (SG-DUP) was collected as a duplicate of soil gas sample SG-1A and analyzed for VOCs using EPA Method TO-15. Laboratory analysis of the duplicate soil gas sample collected identified several VOCs at concentrations greater than the laboratory method reporting limits, but less than their respective VISLs. The compounds detected in the duplicate sample were similar to those detected in the record sample. A Level II QA/QC package was requested from the laboratory. The results are summarized in Table 1 and the laboratory report is included as Appendix A. 6.0 CONCLUSIONS Based on the results of the soil gas sampling, ECS has the following conclusions: • Laboratory results of the soil gas samples did not identify concentrations of 1,3-butadiene at concentrations exceeding the method detection limit. Based on the lack of 1,3-butadiene detections during the verification sampling, the previous 1,3-butadiene detections do not appear to be representative of actual site soil gas conditions and appear to have been false positives. • Additionally, it does not appear that a vapor intrusion concern exists for the previous soil sample which contained detections of PCE and TCE. Verification Soil Gas Sampling Report Former Sherwin Williams Brownfields Property Charlotte, Mecklenburg County, North Carolina Brownfields Project Number 24002-20-060 ECS Project No. 49:10756-E December 17, 2020 7 • Therefore, based on previous site soil, groundwater, the discussed soil gas sample results, and the NCDEQ Risk Calculators, it does not appear that there is a vapor intrusion concern for the proposed site redevelopment and as such, a vapor mitigation system is not warranted. 7.0 RECOMMENDATIONS Based on the results of the previous site soil, groundwater, and soil gas samples collected, additional assessment activities do not appear warranted at this time. FIGURES SOURCE: USGS TOPOGRAPHIC MAPCAHRLOTTE EAST 7.5 MINUTE QUADRANGLE DATED 2019 SITE FIGURE 1 SITE TOPOGRAPHIC LOCATION MAP Former Sherwin Williams Brownfields Site Central Avenue at Pecan Avenue Charlotte, Mecklenburg, North Carolina ECS PROJECT NO. 49-10756-C Brownfields Project No.: 24002-20-060 FIGURE 2SITE LOCATION MAPFormer Sherwin Williams Brownfields SiteCentral Avenue at Pecan AvenueCharlotte, Mecklenburg, North Carolina ECS PROJECT NO. 49-10756-DBrownfields Project No.: 24002-20-060 SOURCE: GOOGLE EARTH AERIAL IMAGERY, 2019 SCALE: AS SHOWN APPROXIMATE PARCEL BOUNDARIESAPPROXIMATE SITE BOUNDARY LEGEND 0811772408117723 08117722 0811722 PARCEL ID NUMBER FIGURE 3 VERIFICATION SOIL GAS SAMPLE LOCATION MAP Former Sherwin Williams Brownfields Site Central Avenue at Pecan Avenue Charlotte, Mecklenburg, North Carolina ECS PROPOSAL NO. 49-10756-E Brownfields Project No.: 24002-20-060 SOURCE: GOOGLE EARTH AERIAL IMAGERY, 2019 SCALE: AS SHOWN LEGEND APPROXIMATE INITIAL SOIL GAS SAMPLE LOCATION WITH 1,3-BUTADIENE EXCEEDANCE SG-1 SG-3 SG-4 SG-5 PROPOSED VERFICATION SOIL GAS SAMPLE LOCATION H-1 APPROXIMATE SOIL SAMPLE LOCATION WITH PCE/TCE EXCEEDANCE SG-1 SG-1A SG-1A/SG-10 SG-3A SG-4A SG-5ASG-10 H-1 TABLES Parameter Sample ID SG-1 SG-1A SG-3 SG-3A SG-4 SG-4A SG-5 SG-5A SG-10 SG-DUP Sample Depth (ft)6 6 6 6 6 6 6 6 6 6 Collection Date 8/6/2020 11/6/2020 8/6/2020 11/6/2020 8/6/2020 11/6/2020 8/6/2020 11/6/2020 Acetone 99 110 1,800 <0.5 150 47 220 <0.5 <0.5 96 220,000 2,700,000 Benzene 18 17 20 49 7.9 14 25 26 48 17 120 1,600 1,3-Butadiene 26*<0.1 49*<0.1 31*<0.1 92*<0.1 <0.1 <0.1 14 180 2-Butanone (MEK)11J 8.7 91 7.6 13J 5.7 26 21 17 9.6 35,000 440,000 Carbon Disulfide <1.6 30 10 44 <1.6 20 54 54 180 30 4,900 61,000 Carbon Tetrachloride <0.33 1.0J <0.33 0.6J <0.33 0.5J <0.33 0.6J 0.4J 1.0J 160 2,000 Chloroethane <0.52 0.8J <0.52 4.2 <0.52 0.9J <0.52 2.6 3.3 0.9J 70,000 880,000 Chloroform 2.4 3.6 <0.24 2.3 <0.24 0.8J <0.24 0.7J <0.2 3.8 41 530 Chloromethane 11 3.9 9.6 31 <0.32 4.3 <0.32 12 18 4.2 630 7,900 Cyclohexane 37 <0.3 23 <0.3 47 8.8 40 <0.3 <0.3 <0.3 42,000 530,000 1,1-Dichloroethane <0.25 <0.2 <0.25 <0.2 <0.25 <0.2 <0.25 <0.2 150 <0.2 580 7,700 1,1-Dichloroethene <0.43 <0.2 <0.43 <0.2 <0.43 <0.2 <0.43 <0.2 3.9 <0.2 1,400 18,000 cis-1,2,-Dichloroethene <0.27 <0.2 <0.27 <0.2 <0.27 <0.2 <0.27 <0.2 0.9J <0.2 NS NS 1,2-Dichloropropane <0.33 <0.2 <0.33 <0.2 <0.33 <0.2 <0.33 1.4J <0.2 0.2J 28 350 1,3-Dichlorobenzene <0.44 <0.2 9.4 <0.2 11 <0.2 17 <0.2 <0.2 <0.2 NS NS 1,4-Dichlorobenzene <0.27 <0.2 <0.27 <0.2 <0.27 <0.2 <0.27 <0.2 <0.2 0.3J 85 1,100 Dichlorodifluoromethane (F12)<0.31 1.0J <0.31 0.9J <0.31 1.0J <0.31 1.2J 1.1J 0.9J 700 8,800 Ethanol 120 12 61 14 120 12 200 64 13 9.8 NS NS Ethyl acetate <4.3 7.2 <4.3 <0.3 <4.3 <0.3 <4.3 240 <0.3 7.6 490 6,100 Ethylbenzene 1.3 8.0 0.99 5.1 1.2 3.6 1.4 7.9 5.6 8.4 370 4,900 4-Ethyltoluene <0.30 1.3J <0.30 1.1J <0.30 0.8J <0.30 1.4J 1.4J 1.7J NS NS Heptane 11 10 16 18 17 8.7 18 18 110 11 2,800 35,000 Hexane 29 8.2 54 53 74 11 56 35 270 8.6 4,900 61,000 Isopropanol 24 2.1J 41 2.3J 26 4.4J 53 31 17 2.3J 1,400 18,000 Methylene Chloride 5.0J 1.2J <1.6 <0.1 59 1.0J 11 14 2.5 1.4 4,200 53,000 4-Methyl-2-pentanone (MIBK)<0.43 2.4J <0.43 1.2J <0.43 1.7J <0.43 3.6 1.4J 2.7J 21,000 260,000 Naphthalene 1.0J 0.7J <0.59 0.9J <0.59 0.8J <0.59 0.7J 0.8J 0.9J 21 260 Propene 240 50 660 960 370 99 830 550 1,000 49 21,000 260,000 Styrene <0.24 4.0 <0.24 5.3 1.1 4.1 1.3 8.1 5.7 3.9 7,000 88,000 1,1,2,2-Tetrachloroethane <0.43 <0.3 <0.43 <0.3 <0.43 <0.3 <0.43 <0.3 0.6J <0.3 16 210 Tetrachloroethylene 30 1.9J 1.2J 0.9J 43 150 0.73J 1.9J 1.1J 1.9J 280 3,500 Tetrahydrofuran 11 <0.2 5.8J <0.2 <1.5 <0.2 <1.5 <0.2 <0.2 <0.2 14,000 180,000 Toluene 15 70 12 41 15 27 14 110 57 72 35,000 440,000 1,1,1-Trichloroethane <0.36 <0.3 <0.36 <0.3 <0.36 <0.3 <0.36 <0.3 0.7J <0.3 35,000 440,000 Trichloroethylene 1.7 <0.3 <0.40 <0.3 <0.40 <0.3 <0.40 0.8J <0.3 <0.3 14 180 Trichlorofluoromethane (F11)2.4J 1.4J 1.7J 1.6J 2.1J 1.3J 1.6J 1.4J 1.0J 1.4J NS NS 1,1,2-Trichlorotrifluoroethane (F113)<1.2 0.7J <1.2 1.2J <1.2 0.8J <1.2 1.5J 0.8J 0.7J 35,000 440,000 1,2,4-Trimethylbenzene <0.22 3.7 <0.22 4.0 <0.22 2.9 <0.22 5.3 4.4 4.6 420 5,300 1,3,5-Trimethylbenzene <0.26 1.1J <0.26 1.0J <0.26 0.8J <0.26 1.5J 1.1J 1.3J 420 5,300 Vinyl Chloride 6.0 0.7 6.0 14 <0.29 1.5 3.2 3.2 4.1 0.7 56 2,800 m&p-Xylene 3.0 27 3.1 16 2.6 12 3.9 28 18 30 700 8,800 o-Xylene 2.1 7.3 1.6 5.4 1.2 3.6 1.9 9.5 5.8 8.0 700 8,800 Notes: Results presented in micrograms per cubic meter (ug/m3) Only those constituents detected in at least one sample are listed above. For complete results, refer to laboratory report. J = Detected but below the Reporting Limits (lowest calibration standard); therefore, result is an estimated concentration. Bold indicates concentration is greater than Residential sub-slab and exterior VISL Underline indicates concentration is greater than Non-Residential sub-slab and exterior soil VISL VISLs published by the North Carolina Department of Environmental Quality - Inactive Hazardous Sites Branch in February 2018. * = According to laboratory, "The result for this compound cannot be accurately quantified due to the interference from a coeluting organic compounds present in the sample extract. The reported result is estimated." TABLE 1: SUMMARY OF SOIL GAS ANALYTICAL RESULTS FORMER SHERWIN WILLIAMS - VERIFICATION SOIL GAS SAMPLING CENTRAL AVENUE & PECAN AVENUE CHARLOTTE, MECKLENBURG COUNTY, NORTH CAROLINA ECS PROJECT NO. 49-10756-E NCDEQ, BROWNFIELDS PROJECT NO. 24002-20-060 Residential Sub-Slab and Exterior Vapor Intrusion Screening Level (VISL) ug/m3 Non-Residential Sub- Slab and Exterior Soil Vapor Intusion Screening Level (VISL) ug/m3Volatile Organic Compounds by EPA Method TO-15 ANALYTICAL RESULTS 11/6/2020 APPENDIX A 03 December 2020 Enclosed is the analytical report for the above referenced project. The data herein applies to samples as received by H&P Mobile Geochemistry, Inc. on 09-Nov-20 which were analyzed in accordance with the attached Chain of Custody record(s). The results for all sample analyses and required QA/QC analyses are presented in the following sections and summarized in the documents: •Sample Summary •Case Narrative (if applicable) •Sample Results •Quality Control Summary •Notes and Definitions / Appendix •Chain of Custody •Sampling Logs (if applicable) Unless otherwise noted, I certify that all analyses were performed and reviewed in compliance with our Quality Systems Manual and Standard Operating Procedures. This report shall not be reproduced, except in full, without the written approval of H&P Mobile Geochemistry, Inc. We at H&P Mobile Geochemistry, Inc. sincerely appreciate the opportunity to provide analytical services to you on this project. If you have any questions or concerns regarding this analytical report, please contact me at your convenience at 760-804-9678. Sincerely, Client Project: Fmr Sherwin Williams H&P Project: ECS110920-10 Rev 2 Charlotte, NC 28217 1812 Center Park Drive, Suite D ECS Southeast, LLP - Charlotte Roger Smith Laboratory Director Lisa Eminhizer Dear Roger Smith: Quality. Accuracy. Experience.2470 Impala Drive, Carlsbad, CA 92010 & Field Office - Signal Hill, CA P 1.800.834.9888 / 760.804.9678 F 760.804.9159 W handpmg.com MobileGeochemistry Inc. H&P Mobile Geochemistry, Inc. is certified under the California ELAP and the National Environmental Laboratory Accreditation Conference (NELAC) for the fields of proficiency and analytes listed on those certificates. H&P is approved as an Environmental Testing Laboratory in accordance with the DoD-ELAP Program and ISO/IEC 17025:2005 programs for the fields of proficiency and analytes included in the certification process and to the extent offered by the accreditation agency. Unless otherwise noted, accreditation certificate numbers, expiration of certificates, and scope of accreditation can be found at: www.handpmg.com/about/certifications. Fields of services and analytes contained in this report that are not listed on the certificates should be considered uncertified or unavailable for certification. Page 1 of 19 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS110920-10 Rev 2 Fmr Sherwin Williams Roger SmithCharlotte, NC 28217 03-Dec-20 16:12 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Sample ID Laboratory ID Matrix Date Sampled ANALYTICAL REPORT FOR SAMPLES Date Received SG-DUP E011024-01 Vapor 06-Nov-20 09-Nov-20 SG-1A E011024-02 Vapor 06-Nov-20 09-Nov-20 SG-10 E011024-03 Vapor 06-Nov-20 09-Nov-20 SG-3A E011024-04 Vapor 06-Nov-20 09-Nov-20 SG-4A E011024-05 Vapor 06-Nov-20 09-Nov-20 SG-5A E011024-06 Vapor 06-Nov-20 09-Nov-20 This 2nd revised final has been generated to include results for the following analytes: Acetone Cyclohexane Ethanol Ethyl Acetate Heptane Hexane Isopropanol Naphthalene Propene Tetrahydrofuran The percent recovery for Ethanol fell below the method criteria in the continuing calibration verification. Any result for this analyte may be biased low. Page 2 of 19 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS110920-10 Rev 2 Fmr Sherwin Williams Roger SmithCharlotte, NC 28217 03-Dec-20 16:12 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Volatile Organic Compounds by EPA TO-15 H&P Mobile Geochemistry, Inc. Result Analyte Limit Reporting Units Dilution Batch Prepared Analyzed Method Notes FactorMDL J- ReportSG-DUP (E011024-01) Vapor Sampled: 06-Nov-20 Received: 09-Nov-20 EK01212 12-Nov-20 12-Nov-20ug/m3 1Propene EPA TO-151.40.149 """""Dichlorodifluoromethane (F12)J"4.00.40.9 """""Chloromethane "0.80.14.2 """"""Dichlorotetrafluoroethane (F114)2.8ND0.3 """""Vinyl chloride "0.50.10.7 """"""1,3-Butadiene 0.9ND0.1 """"""Bromomethane 1.6ND0.2 """""Chloroethane J"1.10.20.9 """""Ethanol "7.61.29.8 """""Trichlorofluoromethane (F11)J"2.30.21.4 """""Acetone "4.80.596 """""Isopropyl alcohol J"5.00.52.3 """"""1,1-Dichloroethene 1.6ND0.2 """""1,1,2-Trichlorotrifluoroethane (F113)J"3.10.30.7 """""Methylene chloride (Dichloromethane)"1.40.11.4 """""Carbon disulfide "1.30.130 """"""trans-1,2-Dichloroethene 1.6ND0.2 """"""1,1-Dichloroethane 1.6ND0.2 """""2-Butanone (MEK)"2.40.39.6 """""n-Hexane "1.40.28.6 """"""cis-1,2-Dichloroethene 1.6ND0.2 """""Ethyl acetate "2.90.37.6 """""Chloroform "1.00.23.8 """"""Tetrahydrofuran 2.4ND0.2 """"""1,1,1-Trichloroethane 2.2ND0.2 """"""1,2-Dichloroethane (EDC)1.6ND0.2 """""Benzene QL-1L"0.60.117 """""Carbon tetrachloride J"1.30.31.0 """"""Cyclohexane 2.8ND0.3 """""n-Heptane "1.70.211 """"""Trichloroethene 2.2ND0.3 """""1,2-Dichloropropane J"1.90.20.2 """"""Bromodichloromethane 2.7ND0.3 """"""cis-1,3-Dichloropropene 1.8ND0.2 """""4-Methyl-2-pentanone (MIBK)J"3.30.32.7 """"""trans-1,3-Dichloropropene 1.8ND0.2 Page 3 of 19 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS110920-10 Rev 2 Fmr Sherwin Williams Roger SmithCharlotte, NC 28217 03-Dec-20 16:12 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Volatile Organic Compounds by EPA TO-15 H&P Mobile Geochemistry, Inc. Result Analyte Limit Reporting Units Dilution Batch Prepared Analyzed Method Notes FactorMDL J- ReportSG-DUP (E011024-01) Vapor Sampled: 06-Nov-20 Received: 09-Nov-20 EK01212 12-Nov-20 12-Nov-20ug/m3 1Toluene EPA TO-153.10.272 """"""1,1,2-Trichloroethane 2.2ND0.2 """"""2-Hexanone (MBK)3.3ND0.3 """"""Dibromochloromethane 3.5ND0.3 """""Tetrachloroethene J"2.80.31.9 """"""1,2-Dibromoethane (EDB)3.1ND0.3 """"""1,1,1,2-Tetrachloroethane 2.8ND0.3 """"""Chlorobenzene 1.9ND0.4 """""Ethylbenzene "1.80.28.4 """""m,p-Xylene "1.80.230 """""Styrene "1.70.23.9 """""o-Xylene "1.80.28.0 """"""Bromoform 4.2ND0.4 """"""1,1,2,2-Tetrachloroethane 2.8ND0.3 """""4-Ethyltoluene J"2.00.21.7 """""1,3,5-Trimethylbenzene J"2.00.21.3 """""1,2,4-Trimethylbenzene "2.00.24.6 """"""1,3-Dichlorobenzene 2.4ND0.2 """""1,4-Dichlorobenzene J"2.40.20.3 """"""1,2-Dichlorobenzene 2.4ND0.2 """""Naphthalene J"2.10.20.9 """"""1,2,4-Trichlorobenzene 7.5ND0.3 """"""Hexachlorobutadiene 11ND0.9 """"91.6 %76-134Surrogate: 1,2-Dichloroethane-d4 """"101 %78-125Surrogate: Toluene-d8 """"109 %77-127Surrogate: 4-Bromofluorobenzene Page 4 of 19 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS110920-10 Rev 2 Fmr Sherwin Williams Roger SmithCharlotte, NC 28217 03-Dec-20 16:12 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Volatile Organic Compounds by EPA TO-15 H&P Mobile Geochemistry, Inc. Result Analyte Limit Reporting Units Dilution Batch Prepared Analyzed Method Notes FactorMDL J- ReportSG-1A (E011024-02) Vapor Sampled: 06-Nov-20 Received: 09-Nov-20 EK01212 12-Nov-20 12-Nov-20ug/m3 1Propene EPA TO-151.40.150 """""Dichlorodifluoromethane (F12)J"4.00.41.0 """""Chloromethane "0.80.13.9 """"""Dichlorotetrafluoroethane (F114)2.8ND0.3 """""Vinyl chloride "0.50.10.7 """"""Bromomethane 1.6ND0.2 """"""1,3-Butadiene 0.9ND0.1 """""Chloroethane J"1.10.20.8 """""Ethanol "7.61.212 """""Trichlorofluoromethane (F11)J"2.30.21.4 """""Acetone "4.80.5110 """""Isopropyl alcohol J"5.00.52.1 """"""1,1-Dichloroethene 1.6ND0.2 """""1,1,2-Trichlorotrifluoroethane (F113)J"3.10.30.7 """""Methylene chloride (Dichloromethane)J"1.40.11.2 """""Carbon disulfide "1.30.130 """"""trans-1,2-Dichloroethene 1.6ND0.2 """"""1,1-Dichloroethane 1.6ND0.2 """""2-Butanone (MEK)"2.40.38.7 """""n-Hexane "1.40.28.2 """"""cis-1,2-Dichloroethene 1.6ND0.2 """""Ethyl acetate "2.90.37.2 """""Chloroform "1.00.23.6 """"""Tetrahydrofuran 2.4ND0.2 """"""1,1,1-Trichloroethane 2.2ND0.2 """"""1,2-Dichloroethane (EDC)1.6ND0.2 """""Benzene QL-1L"0.60.117 """""Carbon tetrachloride J"1.30.31.0 """"""Cyclohexane 2.8ND0.3 """""n-Heptane "1.70.210 """"""Trichloroethene 2.2ND0.3 """"""1,2-Dichloropropane 1.9ND0.2 """"""Bromodichloromethane 2.7ND0.3 """"""cis-1,3-Dichloropropene 1.8ND0.2 """""4-Methyl-2-pentanone (MIBK)J"3.30.32.4 """"""trans-1,3-Dichloropropene 1.8ND0.2 Page 5 of 19 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS110920-10 Rev 2 Fmr Sherwin Williams Roger SmithCharlotte, NC 28217 03-Dec-20 16:12 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Volatile Organic Compounds by EPA TO-15 H&P Mobile Geochemistry, Inc. Result Analyte Limit Reporting Units Dilution Batch Prepared Analyzed Method Notes FactorMDL J- ReportSG-1A (E011024-02) Vapor Sampled: 06-Nov-20 Received: 09-Nov-20 EK01212 12-Nov-20 12-Nov-20ug/m3 1Toluene EPA TO-153.10.270 """"""1,1,2-Trichloroethane 2.2ND0.2 """"""2-Hexanone (MBK)3.3ND0.3 """"""Dibromochloromethane 3.5ND0.3 """""Tetrachloroethene J"2.80.31.9 """"""1,2-Dibromoethane (EDB)3.1ND0.3 """"""1,1,1,2-Tetrachloroethane 2.8ND0.3 """"""Chlorobenzene 1.9ND0.4 """""Ethylbenzene "1.80.28.0 """""m,p-Xylene "1.80.227 """""Styrene "1.70.24.0 """""o-Xylene "1.80.27.3 """"""Bromoform 4.2ND0.4 """"""1,1,2,2-Tetrachloroethane 2.8ND0.3 """""4-Ethyltoluene J"2.00.21.3 """""1,3,5-Trimethylbenzene J"2.00.21.1 """""1,2,4-Trimethylbenzene "2.00.23.7 """"""1,3-Dichlorobenzene 2.4ND0.2 """"""1,4-Dichlorobenzene 2.4ND0.2 """"""1,2-Dichlorobenzene 2.4ND0.2 """""Naphthalene J"2.10.20.7 """"""1,2,4-Trichlorobenzene 7.5ND0.3 """"""Hexachlorobutadiene 11ND0.9 """"92.3 %76-134Surrogate: 1,2-Dichloroethane-d4 """"99.1 %78-125Surrogate: Toluene-d8 """"107 %77-127Surrogate: 4-Bromofluorobenzene Page 6 of 19 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS110920-10 Rev 2 Fmr Sherwin Williams Roger SmithCharlotte, NC 28217 03-Dec-20 16:12 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Volatile Organic Compounds by EPA TO-15 H&P Mobile Geochemistry, Inc. Result Analyte Limit Reporting Units Dilution Batch Prepared Analyzed Method Notes FactorMDL J- ReportSG-10 (E011024-03) Vapor Sampled: 06-Nov-20 Received: 09-Nov-20 EK01212 12-Nov-20 12-Nov-20ug/m3 1Propene EEPA TO-151.40.11000 """""Dichlorodifluoromethane (F12)J"4.00.41.1 """""Chloromethane "0.80.118 """"""Dichlorotetrafluoroethane (F114)2.8ND0.3 """""Vinyl chloride "0.50.14.1 """"""1,3-Butadiene 0.9ND0.1 """"""Bromomethane 1.6ND0.2 """""Chloroethane "1.10.23.3 """""Ethanol "7.61.213 """""Trichlorofluoromethane (F11)J"2.30.21.0 """"""Acetone 4.8ND0.5 """""Isopropyl alcohol "5.00.517 """""1,1-Dichloroethene "1.60.23.9 """""1,1,2-Trichlorotrifluoroethane (F113)J"3.10.30.8 """""Methylene chloride (Dichloromethane)"1.40.12.5 """""Carbon disulfide "1.30.1180 """"""trans-1,2-Dichloroethene 1.6ND0.2 """""1,1-Dichloroethane "1.60.2150 """""2-Butanone (MEK)"2.40.317 """""n-Hexane "1.40.2270 """""cis-1,2-Dichloroethene QL-1L, J"1.60.20.9 """"""Ethyl acetate 2.9ND0.3 """"""Chloroform 1.0ND0.2 """"""Tetrahydrofuran 2.4ND0.2 """""1,1,1-Trichloroethane J"2.20.20.7 """"""1,2-Dichloroethane (EDC)1.6ND0.2 """""Benzene QL-1L"0.60.148 """""Carbon tetrachloride J"1.30.30.4 """"""Cyclohexane 2.8ND0.3 """""n-Heptane "1.70.2110 """"""Trichloroethene 2.2ND0.3 """"""1,2-Dichloropropane 1.9ND0.2 """"""Bromodichloromethane 2.7ND0.3 """"""cis-1,3-Dichloropropene 1.8ND0.2 """""4-Methyl-2-pentanone (MIBK)J"3.30.31.4 """"""trans-1,3-Dichloropropene 1.8ND0.2 Page 7 of 19 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS110920-10 Rev 2 Fmr Sherwin Williams Roger SmithCharlotte, NC 28217 03-Dec-20 16:12 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Volatile Organic Compounds by EPA TO-15 H&P Mobile Geochemistry, Inc. Result Analyte Limit Reporting Units Dilution Batch Prepared Analyzed Method Notes FactorMDL J- ReportSG-10 (E011024-03) Vapor Sampled: 06-Nov-20 Received: 09-Nov-20 EK01212 12-Nov-20 12-Nov-20ug/m3 1Toluene EPA TO-153.10.257 """"""1,1,2-Trichloroethane 2.2ND0.2 """"""2-Hexanone (MBK)3.3ND0.3 """"""Dibromochloromethane 3.5ND0.3 """""Tetrachloroethene J"2.80.31.1 """"""1,2-Dibromoethane (EDB)3.1ND0.3 """"""1,1,1,2-Tetrachloroethane 2.8ND0.3 """"""Chlorobenzene 1.9ND0.4 """""Ethylbenzene "1.80.25.6 """""m,p-Xylene "1.80.218 """""Styrene "1.70.25.7 """""o-Xylene "1.80.25.8 """"""Bromoform 4.2ND0.4 """""1,1,2,2-Tetrachloroethane J"2.80.30.6 """""4-Ethyltoluene J"2.00.21.4 """""1,3,5-Trimethylbenzene J"2.00.21.1 """""1,2,4-Trimethylbenzene "2.00.24.4 """"""1,3-Dichlorobenzene 2.4ND0.2 """"""1,4-Dichlorobenzene 2.4ND0.2 """"""1,2-Dichlorobenzene 2.4ND0.2 """""Naphthalene J"2.10.20.8 """"""1,2,4-Trichlorobenzene 7.5ND0.3 """"""Hexachlorobutadiene 11ND0.9 """"90.4 %76-134Surrogate: 1,2-Dichloroethane-d4 """"98.5 %78-125Surrogate: Toluene-d8 """"104 %77-127Surrogate: 4-Bromofluorobenzene Page 8 of 19 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS110920-10 Rev 2 Fmr Sherwin Williams Roger SmithCharlotte, NC 28217 03-Dec-20 16:12 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Volatile Organic Compounds by EPA TO-15 H&P Mobile Geochemistry, Inc. Result Analyte Limit Reporting Units Dilution Batch Prepared Analyzed Method Notes FactorMDL J- ReportSG-3A (E011024-04) Vapor Sampled: 06-Nov-20 Received: 09-Nov-20 EK01212 12-Nov-20 12-Nov-20ug/m3 1Propene EEPA TO-151.40.1960 """""Dichlorodifluoromethane (F12)J"4.00.40.9 """""Chloromethane "0.80.131 """"""Dichlorotetrafluoroethane (F114)2.8ND0.3 """""Vinyl chloride "0.50.114 """"""1,3-Butadiene 0.9ND0.1 """"""Bromomethane 1.6ND0.2 """""Chloroethane "1.10.24.2 """""Ethanol "7.61.214 """""Trichlorofluoromethane (F11)J"2.30.21.6 """"""Acetone 4.8ND0.5 """""Isopropyl alcohol J"5.00.52.3 """"""1,1-Dichloroethene 1.6ND0.2 """""1,1,2-Trichlorotrifluoroethane (F113)J"3.10.31.2 """"""Methylene chloride (Dichloromethane)1.4ND0.1 """""Carbon disulfide "1.30.144 """"""trans-1,2-Dichloroethene 1.6ND0.2 """"""1,1-Dichloroethane 1.6ND0.2 """""2-Butanone (MEK)"2.40.37.6 """""n-Hexane "1.40.253 """"""cis-1,2-Dichloroethene 1.6ND0.2 """"""Ethyl acetate 2.9ND0.3 """""Chloroform "1.00.22.3 """"""Tetrahydrofuran 2.4ND0.2 """"""1,1,1-Trichloroethane 2.2ND0.2 """"""1,2-Dichloroethane (EDC)1.6ND0.2 """""Benzene QL-1L"0.60.149 """""Carbon tetrachloride J"1.30.30.6 """"""Cyclohexane 2.8ND0.3 """""n-Heptane "1.70.218 """"""Trichloroethene 2.2ND0.3 """"""1,2-Dichloropropane 1.9ND0.2 """"""Bromodichloromethane 2.7ND0.3 """"""cis-1,3-Dichloropropene 1.8ND0.2 """""4-Methyl-2-pentanone (MIBK)J"3.30.31.2 """"""trans-1,3-Dichloropropene 1.8ND0.2 Page 9 of 19 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS110920-10 Rev 2 Fmr Sherwin Williams Roger SmithCharlotte, NC 28217 03-Dec-20 16:12 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Volatile Organic Compounds by EPA TO-15 H&P Mobile Geochemistry, Inc. Result Analyte Limit Reporting Units Dilution Batch Prepared Analyzed Method Notes FactorMDL J- ReportSG-3A (E011024-04) Vapor Sampled: 06-Nov-20 Received: 09-Nov-20 EK01212 12-Nov-20 12-Nov-20ug/m3 1Toluene EPA TO-153.10.241 """"""1,1,2-Trichloroethane 2.2ND0.2 """"""2-Hexanone (MBK)3.3ND0.3 """"""Dibromochloromethane 3.5ND0.3 """""Tetrachloroethene J"2.80.30.9 """"""1,2-Dibromoethane (EDB)3.1ND0.3 """"""1,1,1,2-Tetrachloroethane 2.8ND0.3 """"""Chlorobenzene 1.9ND0.4 """""Ethylbenzene "1.80.25.1 """""m,p-Xylene "1.80.216 """""Styrene "1.70.25.3 """""o-Xylene "1.80.25.4 """"""Bromoform 4.2ND0.4 """"""1,1,2,2-Tetrachloroethane 2.8ND0.3 """""4-Ethyltoluene J"2.00.21.1 """""1,3,5-Trimethylbenzene J"2.00.21.0 """""1,2,4-Trimethylbenzene "2.00.24.0 """"""1,3-Dichlorobenzene 2.4ND0.2 """"""1,4-Dichlorobenzene 2.4ND0.2 """"""1,2-Dichlorobenzene 2.4ND0.2 """""Naphthalene J"2.10.20.9 """"""1,2,4-Trichlorobenzene 7.5ND0.3 """"""Hexachlorobutadiene 11ND0.9 """"90.4 %76-134Surrogate: 1,2-Dichloroethane-d4 """"99.3 %78-125Surrogate: Toluene-d8 """"106 %77-127Surrogate: 4-Bromofluorobenzene Page 10 of 19 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS110920-10 Rev 2 Fmr Sherwin Williams Roger SmithCharlotte, NC 28217 03-Dec-20 16:12 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Volatile Organic Compounds by EPA TO-15 H&P Mobile Geochemistry, Inc. Result Analyte Limit Reporting Units Dilution Batch Prepared Analyzed Method Notes FactorMDL J- ReportSG-4A (E011024-05) Vapor Sampled: 06-Nov-20 Received: 09-Nov-20 EK01212 12-Nov-20 12-Nov-20ug/m3 1Propene EPA TO-151.40.199 """""Dichlorodifluoromethane (F12)J"4.00.41.0 """""Chloromethane "0.80.14.3 """"""Dichlorotetrafluoroethane (F114)2.8ND0.3 """""Vinyl chloride "0.50.11.5 """"""1,3-Butadiene 0.9ND0.1 """"""Bromomethane 1.6ND0.2 """""Chloroethane J"1.10.20.9 """""Ethanol "7.61.212 """""Trichlorofluoromethane (F11)J"2.30.21.3 """""Acetone "4.80.547 """""Isopropyl alcohol J"5.00.54.4 """"""1,1-Dichloroethene 1.6ND0.2 """""1,1,2-Trichlorotrifluoroethane (F113)J"3.10.30.8 """""Methylene chloride (Dichloromethane)J"1.40.11.0 """""Carbon disulfide "1.30.120 """"""trans-1,2-Dichloroethene 1.6ND0.2 """"""1,1-Dichloroethane 1.6ND0.2 """""2-Butanone (MEK)"2.40.35.7 """""n-Hexane "1.40.211 """"""cis-1,2-Dichloroethene 1.6ND0.2 """"""Ethyl acetate 2.9ND0.3 """""Chloroform J"1.00.20.8 """"""Tetrahydrofuran 2.4ND0.2 """"""1,1,1-Trichloroethane 2.2ND0.2 """"""1,2-Dichloroethane (EDC)1.6ND0.2 """""Benzene QL-1L"0.60.114 """""Carbon tetrachloride J"1.30.30.5 """""Cyclohexane "2.80.38.8 """""n-Heptane "1.70.28.7 """"""Trichloroethene 2.2ND0.3 """"""1,2-Dichloropropane 1.9ND0.2 """"""Bromodichloromethane 2.7ND0.3 """"""cis-1,3-Dichloropropene 1.8ND0.2 """""4-Methyl-2-pentanone (MIBK)J"3.30.31.7 """"""trans-1,3-Dichloropropene 1.8ND0.2 Page 11 of 19 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS110920-10 Rev 2 Fmr Sherwin Williams Roger SmithCharlotte, NC 28217 03-Dec-20 16:12 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Volatile Organic Compounds by EPA TO-15 H&P Mobile Geochemistry, Inc. Result Analyte Limit Reporting Units Dilution Batch Prepared Analyzed Method Notes FactorMDL J- ReportSG-4A (E011024-05) Vapor Sampled: 06-Nov-20 Received: 09-Nov-20 EK01212 12-Nov-20 12-Nov-20ug/m3 1Toluene EPA TO-153.10.227 """"""1,1,2-Trichloroethane 2.2ND0.2 """"""2-Hexanone (MBK)3.3ND0.3 """"""Dibromochloromethane 3.5ND0.3 """""Tetrachloroethene "2.80.3150 """"""1,2-Dibromoethane (EDB)3.1ND0.3 """"""1,1,1,2-Tetrachloroethane 2.8ND0.3 """"""Chlorobenzene 1.9ND0.4 """""Ethylbenzene "1.80.23.6 """""m,p-Xylene "1.80.212 """""Styrene "1.70.24.1 """""o-Xylene "1.80.23.6 """"""Bromoform 4.2ND0.4 """"""1,1,2,2-Tetrachloroethane 2.8ND0.3 """""4-Ethyltoluene J"2.00.20.8 """""1,3,5-Trimethylbenzene J"2.00.20.8 """""1,2,4-Trimethylbenzene "2.00.22.9 """"""1,3-Dichlorobenzene 2.4ND0.2 """""1,4-Dichlorobenzene J"2.40.20.2 """"""1,2-Dichlorobenzene 2.4ND0.2 """""Naphthalene J"2.10.20.8 """"""1,2,4-Trichlorobenzene 7.5ND0.3 """"""Hexachlorobutadiene 11ND0.9 """"89.6 %76-134Surrogate: 1,2-Dichloroethane-d4 """"99.2 %78-125Surrogate: Toluene-d8 """"111 %77-127Surrogate: 4-Bromofluorobenzene Page 12 of 19 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS110920-10 Rev 2 Fmr Sherwin Williams Roger SmithCharlotte, NC 28217 03-Dec-20 16:12 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Volatile Organic Compounds by EPA TO-15 H&P Mobile Geochemistry, Inc. Result Analyte Limit Reporting Units Dilution Batch Prepared Analyzed Method Notes FactorMDL J- ReportSG-5A (E011024-06) Vapor Sampled: 06-Nov-20 Received: 09-Nov-20 EK01212 12-Nov-20 12-Nov-20ug/m3 1Propene EEPA TO-151.40.1550 """""Dichlorodifluoromethane (F12)J"4.00.41.2 """""Chloromethane "0.80.112 """"""Dichlorotetrafluoroethane (F114)2.8ND0.3 """""Vinyl chloride "0.50.13.2 """"""1,3-Butadiene 0.9ND0.1 """"""Bromomethane 1.6ND0.2 """""Chloroethane "1.10.22.6 """""Ethanol "7.61.264 """""Trichlorofluoromethane (F11)J"2.30.21.4 """"""Acetone 4.8ND0.5 """""Isopropyl alcohol "5.00.531 """"""1,1-Dichloroethene 1.6ND0.2 """""1,1,2-Trichlorotrifluoroethane (F113)J"3.10.31.5 """""Methylene chloride (Dichloromethane)"1.40.114 """""Carbon disulfide "1.30.154 """"""trans-1,2-Dichloroethene 1.6ND0.2 """"""1,1-Dichloroethane 1.6ND0.2 """""2-Butanone (MEK)"2.40.321 """""n-Hexane "1.40.235 """"""cis-1,2-Dichloroethene 1.6ND0.2 """""Ethyl acetate "2.90.3240 """""Chloroform J"1.00.20.7 """"""Tetrahydrofuran 2.4ND0.2 """"""1,1,1-Trichloroethane 2.2ND0.2 """"""1,2-Dichloroethane (EDC)1.6ND0.2 """""Benzene QL-1L"0.60.126 """""Carbon tetrachloride J"1.30.30.6 """"""Cyclohexane 2.8ND0.3 """""n-Heptane "1.70.218 """""Trichloroethene J"2.20.30.8 """""1,2-Dichloropropane J"1.90.21.4 """"""Bromodichloromethane 2.7ND0.3 """"""cis-1,3-Dichloropropene 1.8ND0.2 """""4-Methyl-2-pentanone (MIBK)"3.30.33.6 """"""trans-1,3-Dichloropropene 1.8ND0.2 Page 13 of 19 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS110920-10 Rev 2 Fmr Sherwin Williams Roger SmithCharlotte, NC 28217 03-Dec-20 16:12 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Volatile Organic Compounds by EPA TO-15 H&P Mobile Geochemistry, Inc. Result Analyte Limit Reporting Units Dilution Batch Prepared Analyzed Method Notes FactorMDL J- ReportSG-5A (E011024-06) Vapor Sampled: 06-Nov-20 Received: 09-Nov-20 EK01212 12-Nov-20 12-Nov-20ug/m3 1Toluene EPA TO-153.10.2110 """"""1,1,2-Trichloroethane 2.2ND0.2 """"""2-Hexanone (MBK)3.3ND0.3 """"""Dibromochloromethane 3.5ND0.3 """""Tetrachloroethene J"2.80.31.9 """"""1,2-Dibromoethane (EDB)3.1ND0.3 """"""1,1,1,2-Tetrachloroethane 2.8ND0.3 """"""Chlorobenzene 1.9ND0.4 """""Ethylbenzene "1.80.27.9 """""m,p-Xylene "1.80.228 """""Styrene "1.70.28.1 """""o-Xylene "1.80.29.5 """"""Bromoform 4.2ND0.4 """"""1,1,2,2-Tetrachloroethane 2.8ND0.3 """""4-Ethyltoluene J"2.00.21.4 """""1,3,5-Trimethylbenzene J"2.00.21.5 """""1,2,4-Trimethylbenzene "2.00.25.3 """"""1,3-Dichlorobenzene 2.4ND0.2 """"""1,4-Dichlorobenzene 2.4ND0.2 """"""1,2-Dichlorobenzene 2.4ND0.2 """""Naphthalene J"2.10.20.7 """"""1,2,4-Trichlorobenzene 7.5ND0.3 """"""Hexachlorobutadiene 11ND0.9 """"89.4 %76-134Surrogate: 1,2-Dichloroethane-d4 """"98.3 %78-125Surrogate: Toluene-d8 """"107 %77-127Surrogate: 4-Bromofluorobenzene Page 14 of 19 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS110920-10 Rev 2 Fmr Sherwin Williams Roger SmithCharlotte, NC 28217 03-Dec-20 16:12 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Volatile Organic Compounds by EPA TO-15 - Quality Control H&P Mobile Geochemistry, Inc. Batch EK01212 - TO-15 Blank (EK01212-BLK1)Prepared & Analyzed: 12-Nov-20 Propene ug/m31.4ND Dichlorodifluoromethane (F12)"4.0ND Chloromethane "0.8ND Dichlorotetrafluoroethane (F114)"2.8ND Vinyl chloride "0.5ND 1,3-Butadiene "0.9ND Bromomethane "1.6ND Chloroethane "1.1ND Ethanol "7.6ND Trichlorofluoromethane (F11)"2.3ND Acetone "4.8ND Isopropyl alcohol "5.0ND 1,1-Dichloroethene "1.6ND 1,1,2-Trichlorotrifluoroethane (F113)"3.1ND Methylene chloride (Dichloromethane)"1.4ND Carbon disulfide "1.3ND trans-1,2-Dichloroethene "1.6ND 1,1-Dichloroethane "1.6ND 2-Butanone (MEK)"2.4ND n-Hexane "1.4ND cis-1,2-Dichloroethene "1.6ND Ethyl acetate "2.9ND Chloroform "1.0ND Tetrahydrofuran "2.4ND 1,1,1-Trichloroethane "2.2ND 1,2-Dichloroethane (EDC)"1.6ND Benzene "0.6ND Carbon tetrachloride "1.3ND Cyclohexane "2.8ND n-Heptane "1.7ND Trichloroethene "2.2ND 1,2-Dichloropropane "1.9ND Bromodichloromethane "2.7ND cis-1,3-Dichloropropene "1.8ND Page 15 of 19 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS110920-10 Rev 2 Fmr Sherwin Williams Roger SmithCharlotte, NC 28217 03-Dec-20 16:12 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Volatile Organic Compounds by EPA TO-15 - Quality Control H&P Mobile Geochemistry, Inc. Batch EK01212 - TO-15 Blank (EK01212-BLK1)Prepared & Analyzed: 12-Nov-20 4-Methyl-2-pentanone (MIBK)ug/m33.3ND trans-1,3-Dichloropropene "1.8ND Toluene "3.1ND 1,1,2-Trichloroethane "2.2ND 2-Hexanone (MBK)"3.3ND Dibromochloromethane "3.5ND Tetrachloroethene "2.8ND 1,2-Dibromoethane (EDB)"3.1ND 1,1,1,2-Tetrachloroethane "2.8ND Chlorobenzene "1.9ND Ethylbenzene "1.8ND m,p-Xylene "1.8ND Styrene "1.7ND o-Xylene "1.8ND Bromoform "4.2ND 1,1,2,2-Tetrachloroethane "2.8ND 4-Ethyltoluene "2.0ND 1,3,5-Trimethylbenzene "2.0ND 1,2,4-Trimethylbenzene "2.0ND 1,3-Dichlorobenzene "2.4ND 1,4-Dichlorobenzene "2.4ND 1,2-Dichlorobenzene "2.4ND Naphthalene "2.1ND 1,2,4-Trichlorobenzene "7.5ND Hexachlorobutadiene "11ND "42.7 76-134Surrogate: 1,2-Dichloroethane-d4 10243.7 "41.6 78-125Surrogate: Toluene-d8 99.441.3 "72.6 77-127Surrogate: 4-Bromofluorobenzene 10375.0 Page 16 of 19 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS110920-10 Rev 2 Fmr Sherwin Williams Roger SmithCharlotte, NC 28217 03-Dec-20 16:12 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Volatile Organic Compounds by EPA TO-15 - Quality Control H&P Mobile Geochemistry, Inc. Batch EK01212 - TO-15 LCS (EK01212-BS1)Prepared & Analyzed: 12-Nov-20 Dichlorodifluoromethane (F12)ug/m3 20.2 59-1281054.021 Vinyl chloride "10.4 64-12793.20.59.7 Chloroethane "10.7 63-12788.61.19.5 Trichlorofluoromethane (F11)"22.6 62-12697.42.322 1,1-Dichloroethene "16.2 61-13372.21.612 1,1,2-Trichlorotrifluoroethane (F113)"31.0 66-12689.03.128 Methylene chloride (Dichloromethane)"14.2 62-11573.71.410 trans-1,2-Dichloroethene "16.2 QL-1L67-12465.21.611 1,1-Dichloroethane "16.5 68-12668.31.611 cis-1,2-Dichloroethene "16.0 QL-1L70-12166.41.611 Chloroform "19.8 68-12385.81.017 1,1,1-Trichloroethane "22.2 68-12588.12.220 1,2-Dichloroethane (EDC)"16.5 65-12883.71.614 Benzene "13.0 QL-1L69-11968.60.68.9 Carbon tetrachloride "25.6 68-13292.81.324 Trichloroethene "21.9 71-12383.52.218 Toluene "15.4 66-11974.53.111 1,1,2-Trichloroethane "22.2 73-11976.12.217 Tetrachloroethene "27.6 66-12484.32.823 1,1,1,2-Tetrachloroethane "28.0 67-12986.62.824 Ethylbenzene "17.7 70-12472.11.813 m,p-Xylene "17.7 61-13481.81.814 o-Xylene "17.7 67-12575.31.813 1,1,2,2-Tetrachloroethane "28.0 65-12769.92.820 "42.7 76-134Surrogate: 1,2-Dichloroethane-d4 10444.3 "41.6 78-125Surrogate: Toluene-d8 96.540.1 "72.6 77-127Surrogate: 4-Bromofluorobenzene 10374.9 Page 17 of 19 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS110920-10 Rev 2 Fmr Sherwin Williams Roger SmithCharlotte, NC 28217 03-Dec-20 16:12 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Result Limit Reporting Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Notes Analyte Volatile Organic Compounds by EPA TO-15 - Quality Control H&P Mobile Geochemistry, Inc. Batch EK01212 - TO-15 LCS Dup (EK01212-BSD1)Prepared & Analyzed: 12-Nov-20 Dichlorodifluoromethane (F12)ug/m3 20.2 2559-128113 6.864.023 Vinyl chloride "10.4 2564-12796.5 3.420.510 Chloroethane "10.7 2563-12791.3 3.051.19.8 Trichlorofluoromethane (F11)"22.6 2562-12698.9 1.522.322 1,1-Dichloroethene "16.2 2561-13375.7 4.711.612 1,1,2-Trichlorotrifluoroethane (F113)"31.0 2566-12691.0 2.213.128 Methylene chloride (Dichloromethane)"14.2 2562-11575.4 2.341.411 trans-1,2-Dichloroethene "16.2 2567-12470.2 7.351.611 1,1-Dichloroethane "16.5 2568-12675.7 10.41.612 cis-1,2-Dichloroethene "16.0 25 QL-1L70-12168.9 3.721.611 Chloroform "19.8 2568-12387.8 2.291.017 1,1,1-Trichloroethane "22.2 2568-12591.5 3.872.220 1,2-Dichloroethane (EDC)"16.5 2565-12885.2 1.771.614 Benzene "13.0 2569-11971.1 3.570.69.2 Carbon tetrachloride "25.6 2568-13295.3 2.651.324 Trichloroethene "21.9 2571-12386.5 3.512.219 Toluene "15.4 2566-11978.5 5.193.112 1,1,2-Trichloroethane "22.2 2573-11978.9 3.522.218 Tetrachloroethene "27.6 2566-12487.6 3.772.824 1,1,1,2-Tetrachloroethane "28.0 2567-12988.6 2.272.825 Ethylbenzene "17.7 2570-12475.8 5.041.813 m,p-Xylene "17.7 2561-13484.1 2.701.815 o-Xylene "17.7 2567-12577.1 2.281.814 1,1,2,2-Tetrachloroethane "28.0 2565-12772.4 3.502.820 "42.7 76-134Surrogate: 1,2-Dichloroethane-d4 10444.3 "41.6 78-125Surrogate: Toluene-d8 96.840.2 "72.6 77-127Surrogate: 4-Bromofluorobenzene 10475.3 Page 18 of 19 Project: Project Number: Project Manager: Reported: ECS Southeast, LLP - Charlotte 1812 Center Park Drive, Suite D ECS110920-10 Rev 2 Fmr Sherwin Williams Roger SmithCharlotte, NC 28217 03-Dec-20 16:12 H&P Mobile Geochemistry Inc. 2470 Impala Drive Carlsbad, CA 92010 760-804-9678 Phone 760-804-9159 Fax Notes and Definitions QL-1L The LCS and/or LCSD recoveries fell below the established control specifications for this analyte. Any result for this compound is qualified and should be considered biased low. QL-1L The LCS and/or LCSD recoveries fell below the established control specifications for this analyte. Any result for this compound is qualified and should be considered biased low. J- Report This sample is reported to the MDL or LOD determined for this method. All confirmed hits above the listed MDL or LOD value and below the RL/LOQ, will be flagged with a "J" result. If an MDL or LOD is not listed, the analyte is ND at the RL. J Detected but below the RL/LOQ; therefore, result is an estimated concentration. E The concentration indicated for this analyte is an estimated value above the calibration range of the instrument. This value is considered an estimate (CLP E-flag). Percent Recovery Relative Percent DifferenceRPD %REC Method Detection LimitMDL Analyte NOT DETECTED at or above the reporting limitND Leak Check CompoundLCC Appendix H&P Mobile Geochemistry, Inc. is approved as an Environmental Testing Laboratory and Mobile Laboratory in accordance with the DoD-ELAP Program and ISO/IEC 17025:2005 programs through PJLA, accreditation number 69070 for EPA Method TO-15, EPA Method 8260B and H&P 8260SV. H&P is approved by the State of California as an Environmental Laboratory and Mobile Laboratory in conformance with the Environmental Laboratory Accreditation Program (ELAP) for the category of Volatile and Semi-Volatile Organic Chemistry of Hazardous Waste, certification numbers 2740, 2741, 2743 & 2745. H&P is approved by the State of Louisiana Department of Environmental Quality under the National Environmental Laboratory Accreditation Conference (NELAC) certification number 04138. The complete list of stationary and mobile laboratory certifications along with the fields of testing (FOTs) and analyte lists are available at www.handpmg.com/about/certifications. All soil results are reported in wet weight. Page 19 of 19 ,ep Mobile Geochemistry, Inc. 2470 Impala Drive, Carlsbad, CA 92010 & Field Office - Signal Hill, CA W handpmg.com E info@handpmg.com P 760.804.9678 F 760.804.9159 DATE: IN/ 6/2.0 Page I of VAPOR I AIR Chain of Custody Lab Client and Project Information Outside Lab: Sample Receipt (Lab Use Only) Lab Client/Consultant: a c,,, Project Name / #: (.,,f Aili 5(44 --,,, 6 N: ck,AA Z-) Date Rec'd [pl at, Control #: -..)e6 oar,. -riorC Lab Client Project Manager: n 1-..- ') i-t" Project Location: H&P Project # E.—_ast 1 D9„2.b -1 a Lab Client Address: leto o (wit(--4 kJ-- Dr 5,thi.,k Report E-Mail(s): 1 v -z Kir\ j ee-C4)VI "At Co Lab Work Order # Eal 0.2"1 Lab Client City, State, Zip: (.10A_ Li g Usi, 1- Sample Intact: 0 Notes Below See • Yes No • Phone Number: qv 4 _ c),/, s - 5 t 5 2 Receipt Gauge ID: ..- Temp: .+ Reporting Requirements Turnaround Time Sampler Information andard Report q Level III q Level IV Excel EDD q Other EDD: 1 Standard report, q Rush (7 days for preliminary 10 days for final report) (specify): sampler(s):tiksko&L 1.k.A..ivtelpeN ,,crelicict,Notes/Tracla#15: 2,1 4 0600, _ ,,, if (09 C} Lab PM Initials: Signature: q CA Geotracker Global ID: Date: t A. (Le f vo Additional Instructions to Laboratory: A IL Rs itiactao T., 1;14 re At * Preferred VOC units (please choos one): 1911 'I S..1-- -:,.. -(k.(1. It-9- \fbc_ k i 3-19,A),(4 i mil__ dfRX CGS e Intt : Iof eo II 101 — 103 -\- q lag/ Fjj.tg/m3 q ppbv q ppmv VOCs Standard Full List Alibi q 8260SV iT0-15 VOCs Short List Project List q 8260SV 0 TO-15 Oxygenates q 8260SV 0 TO-15 Naphthalene q 8260SV 0 TO-15 TPHv as Gas q 8260SVm q TO-15m Aromatic/Aliphatic Fractions O 8260SVm E TO-15m Leak Check Compound q DFA q IPA q He Methane by EPA 8015m Fixed Gases by ASTM D1945 D CO2 0 02 0 N2 I ‘,..) al cl-d_ 8c) V''— I D.- r-- ) SAMPLE NAME FIELD POINT NAME (if applicable) DATE mm/dd/yy TIME 24hr clock SAMPLE TYPE Indoor Air (IA), Ambient Air (AA), Subslab (SS), Soil Vapor (SV) F CONTAINER SIZE & TYPE 400mL/1LJ6L Summa, Tedlar, Tube, etc. CONTAINER ID (###) Lab use only: Receipt Vac & — 12 kik ? 4/)(0/7. — 5 V 1 t- 'To -58S' 9-x /(0'-iik NOP (7-% log- --(avy 9- 'X 5 - (o 4wp, 1 -5 n ro t 9 .:.-7. s- )( S6-3A iii 1- '43.34 9- S & - Li. A (ii‘o/P It WZO It3/' 60- -yip 4 Ltn 0 - 5A, 40/20 6 0 cl / 4-31* 40,0° Q 12/.2/C, 771e Pd lolon„c- aridivi Ivoe kzuu triduca a z iced -bil,2 , Aid Oke ya.,1 , etra-01 , eit jf keda.te„,1 tkpi-a.x.0 I-I(A-A-& L P A , ktaPil4Wt1 0,A,, , 1 RP , iefirah di ). cetticfe4---, L'f4' I r Approved/Relinquished by Company 6 5 Date: + . iiv Time: 1 kt/q tow ReceivedJW Company: Date: Time: Le(' e)( Approved/Relinquished by: Company: Date: Time: 1-1--er Receiv d : ,tz:„./15..Ftzs _igate: i Ot p_ co Timegzt S-- Approved/Relinquished by: Company: Date: Time: Recei ed by: Company: Date: I Time: Approval constitutes as authorization to proceed with analysis and acceptance of conditions on back Appendix 6A1, Rev 1/9/2019, Effective 1/21/2019