Loading...
HomeMy WebLinkAboutWS-29285_48452_CA_LSA_20221206 Limited Site Assessment Guilford County Schools Bus Garage Incident No. 48452 131 Franklin Boulevard, Greensboro, Guilford County, North Carolina S&ME Project No. 22580197 PREPARED FOR: Guilford County Schools 3920 Naco Road Greensboro, North Carolina 27401 PREPARED BY: S&ME, Inc. 8646 West Market Street, Suite 105 Greensboro, North Carolina 27409 December 6, 2022 S&ME, Inc. | 8646 West Market Street, Suite 105 | Greensboro, NC 27409 | p 336.288.7180 | www.smeinc.com December 6, 2022 Guilford County Schools 3920 Naco Road Greensboro, North Carolina, 27401 Attention: Mr. David Kemp Reference: Limited Site Assessment Guilford County Schools Bus Garage Incident No. 48452 131 Franklin Boulevard, Greensboro, Guilford County, North Carolina S&ME Project No. 22580197 Dear Mr. Kemp: S&ME, Inc. (S&ME) has completed a Limited Site Assessment (LSA) for the referenced property. The attached report presents the findings of S&ME’s LSA performed in accordance with S&ME Proposal No. 22580197B, dated August 15, 2022. On behalf of Guilford County Schools, S&ME submitted a copy of this LSA to the North Carolina Department of Environmental Quality to comply with the Notice of Regulatory Requirement dated July 6, 2022. Please contact us at your convenience if there are questions regarding the information contained in this report. Sincerely, S&ME, Inc. Cody McMechen, G.I.T. Wayne Watterson, P.E. Staff Professional Senior Engineer cc: Mr. Jordan Lerew, GCDPH Limited Site Assessment Guilford County Schools Bus Garage Incident No. 48452 131 Franklin Boulevard, Greensboro, Guilford County, North Carolina S&ME Project No. 22580197 December 6, 2022 i Table of Contents 1.0 Site Information ................................................................................................................ 1 1.1 Information about Contacts Associated with the Leaking UST System ................................. 1 1.2 Information about the Release ...................................................................................................... 1 2.0 Site History and Characterization ................................................................................. 2 2.1 Release Description and Initial Abatement Actions .................................................................. 3 2.1.1 Release Discovery ........................................................................................................................... 3 2.1.2 Notice of Regulatory Requirements ............................................................................................. 3 2.1.3 Soil Excavation ................................................................................................................................ 3 2.1.4 Soil Sampling and Laboratory Analysis ...................................................................................... 3 3.0 Risk Characterization ....................................................................................................... 4 4.0 Property Surrounding Source Area of Release ........................................................... 5 5.0 Receptor Information ....................................................................................................... 6 5.1 Water Supply Wells ....................................................................................................................... 6 5.2 Public Water Supplies .................................................................................................................... 6 5.3 Surface Water .................................................................................................................................. 6 5.4 Wellhead Protection Area ............................................................................................................. 7 5.5 Subsurface Structures .................................................................................................................... 7 5.6 Property Owners and Occupants ................................................................................................. 7 5.7 Sensitive Land Use Features ......................................................................................................... 7 6.0 Site Geology and Hydrogeology .................................................................................... 7 7.0 Sample Results .................................................................................................................. 8 7.1 Soil Sampling .................................................................................................................................. 8 7.2 Groundwater Sampling ................................................................................................................. 8 7.3 Groundwater Analytical Results .................................................................................................. 8 7.4 Groundwater Occurrence .............................................................................................................. 9 8.0 Conclusions ........................................................................................................................ 9 Limited Site Assessment Guilford County Schools Bus Garage Incident No. 48452 131 Franklin Boulevard, Greensboro, Guilford County, North Carolina S&ME Project No. 22580197 December 6, 2022 ii Appendices Appendix I –Figures Appendix II – Tables Appendix III – UST Documents Appendix IV – Field Forms Appendix V – Receptor Survey Information Appendix VI – Laboratory Analytical Reports Limited Site Assessment Guilford County Schools Bus Garage Incident No. 48452 131 Franklin Boulevard, Greensboro, Guilford County, North Carolina S&ME Project No. 22580197 December 6, 2022 1 1.0 Site Information Date of Report: 12/6/2022 Site Risk: pending Facility I.D.:00-0-0000001641 UST Incident Number (if known): 48452 Site Name: Guilford County Schools Bus Garage Street Address:131 Franklin Blvd. City/Town:Greensboro Zip Code: 27405 County: Guilford Description of Geographical Data Point (e.g., diesel fill port):UST Location Method (GPS, topographical map, other):Google Earth Latitude (decimal degrees):36.078610 Longitude (decimal degrees): -79.738750 1.1 Information about Contacts Associated with the Leaking UST System UST/AST Owner: Guilford County Schools Email: gcs- transportation@gcsnc.com Address: 131 Franklin Blvd. Greensboro, NC 27401 Tel: 336-370-2386 Property Owner: Guilford County Schools Email: gcs- transportation@gcsnc.com Address: 3920 Naco Road, Greensboro, NC 27401 Tel: 336-370-2386 Property Occupant: Guilford County Schools Email: gcs- transportation@gcsnc.com Address: 131 Franklin Blvd. Greensboro, NC 27401 Tel: 336-370-2386 Consultant/Contractor: Wayne Watterson Email: wwatterson@smeinc.com Address: 8646 W. Market Street Ste. 105, Greensboro, NC 27409 Tel: 336-908-7653 Analytical Laboratory: Eurofins Environmental Testing State Certification No: 269 Address: 5102 LaRoche Ave, Savannah, GA 31404 Tel: 912-354-7858 1.2 Information about the Release Date Discovered: 4/22/22 Estimated Quantity of Release: Unknown Cause of Release: Unknown Source of Release (e.g., Dispenser/Piping/UST):Unknown Sizes and Contents of Tanks or Other Containment from which the Release Occurred: 1,000-gallon Used Oil UST Limited Site Assessment Guilford County Schools Bus Garage Incident No. 48452 131 Franklin Boulevard, Greensboro, Guilford County, North Carolina S&ME Project No. 22580197 December 6, 2022 2 I, Wayne Watterson, a Professional Engineer for S&ME, Inc., do certify that the information contained in this report is correct and accurate to the best of my knowledge. Wayne Watterson, P.E. S&ME, Inc. is licensed to practice geology/engineering in North Carolina. Geology License Certification #C-145 and Engineering License Certification #F-0176 2.0 Site History and Characterization The subject site is located at 131 Franklin Street in Greensboro, North Carolina as depicted on the USGS Topographic Map included as Figure 1 in Appendix I. Figure 2 illustrates the former location of the used oil underground storage tank (UST) at the property. UST information is provided below in Table 1.1 and Table 1.2. S&ME understands the UST was not registered with the North Carolina Department of Environmental Quality (NCDEQ). Guilford County Schools elected to discontinue use of the UST and remove the UST from the ground. A release at the UST was identified during the removal of the UST on April 22, 2022. The subject site is an active vehicle maintenance facility used for maintenance of the Guilford County Schools bus fleet. The UST was used to store used oil that was generated during maintenance operations at the facility. S&ME is not aware of the presence of a water supply well on the property, and the property is connected to the City of Greensboro public water supply. The ground surface on the subject property is relatively flat, but slopes toward the north-northeast. The ground surface on the subject property is primarily covered by concrete, asphalt, and gravel. Table 1.1. UST Owner UST ID No. Facility ID No. Name of Owner Street Address Telephone Dates of Operation N/A Unregistered Guilford County Schools 131 Franklin Street, Greensboro, North Carolina 336.370.2386 Unknown- April 22, 2022 Table 1.2. UST Information Tank No. Last Contents Capacity Construction Details Tank Dimensions Date Tanks Installed N/A Used Oil 1000 Steel 4’ x 11’ unknown Limited Site Assessment Guilford County Schools Bus Garage Incident No. 48452 131 Franklin Boulevard, Greensboro, Guilford County, North Carolina S&ME Project No. 22580197 December 6, 2022 3 2.1 Release Description and Initial Abatement Actions 2.1.1 Release Discovery Guilford County Schools informed Mr. Jordan Lerew with the Guilford County Department of Public Health of its intent to remove the used oil UST on April 22, 2022. Mr. Lerew was present at the site on April 22, 2022, to observe removal operations. A representative of the Guilford County Fire Marshal’s office was also present on April 22, 2022. In an Initial Abatement Action Report, dated June 21, 2022, S&ME documented the UST removal, soil and liquid disposal, and soil sampling in reference to the used oil UST. Additional information can be found in Section 2.1.3 and Section 2.1.4. Copies of the UST-2, UST-3, and UST-61 forms are included in Appendix III. No other emergency response measures were taken. 2.1.2 Notice of Regulatory Requirements In a letter dated July 6, 2022, the NCDEQ issued a Notice of Regulatory Requirements (NORR) to the Guilford County Board of Education, requiring the preparation of a Limited Site Assessment Report. On behalf of Guilford County Board of Education, S&ME prepared this report in response to the NORR. 2.1.3 Soil Excavation After removal of the UST from the ground on April 22, 2022, Guilford County Schools excavated soil from the UST basin. Soil was loaded onto trucks and transported to Earthtec for treatment. Guilford County Schools continued excavation of petroleum impacted soil on April 25, 2022. Prior to additional excavation, Shamrock Environmental Corporation removed approximately 390 gallons of liquids from the UST excavation. The apparent source of the water in the excavation was a drain line that was encountered during soil excavation activities. Approximately 148.21 tons of soil was excavated at the former UST location and transported to Earthtec for disposal. The final excavation limits measured approximately 21 feet by 13 feet by 12 feet deep. Groundwater was not observed in the excavation. 2.1.4 Soil Sampling and Laboratory Analysis S&ME collected one soil sample (C-1) from the excavated soil that was transported to Earthtec, on April 25, 2022, for characterization purposes. The soil sample was collected from the backhoe operated by Guilford County Schools. The soil sample was transferred to laboratory-prepared containers by hand using nitrile gloves. The containers were labeled and stored on ice in a cooler. Limited Site Assessment Guilford County Schools Bus Garage Incident No. 48452 131 Franklin Boulevard, Greensboro, Guilford County, North Carolina S&ME Project No. 22580197 December 6, 2022 4 Soil sample C-1 was analyzed in the laboratory for diesel range total petroleum hydrocarbons (DRO) by Method 8015C, and for total lead and total chromium by EPA Method 6010D. Sample C-1 contained a DRO concentration of 2,400 milligrams per kilogram (mg/kg). Total chromium was reported in the sample at a concentration of 45.6 mg/kg, and total lead was reported at a concentration of 0.498 mg/kg. After excavation activities were completed, S&ME collected soil samples from the floor and sidewalls of the excavation for laboratory analysis on April 25, 2022. Soil sample locations are shown on Figure 3, Appendix I. Soil samples were collected with a backhoe operated by Guilford County Schools. The soil samples were transferred to laboratory-prepared containers by hand using nitrile gloves. The containers were labeled and stored on ice in a cooler. The coolers were delivered to ENCO analytical laboratory, a North Carolina-certified laboratory, by courier under chain-of-custody procedures on April 26, 2022. The excavation was then backfilled with offsite borrow soil. Floor and sidewall soil samples were analyzed in the laboratory for volatile organic compounds by EPA Method 8260, for semi-volatile organic compounds by EPA Method 8270, for extractable and volatile petroleum hydrocarbons (EPH and VPH) by the MADEP methods, for total lead and total chromium by EPA Method 6010D, and for hexavalent chromium by EPA Method 7196A. Table 1 in Appendix II summarizes the results of laboratory analyses performed on the soil samples collected from the UST excavation limits. A copy of the laboratory analytical report and chain-of-custody is included in Appendix VI. Analytical results for soil samples collected from the excavation limits indicate multiple target analytes were detected at concentrations above the Soil-to-Water Maximum Soil Contaminant Concentrations (MSCC). C9-C22 aromatics were detected at concentrations greater than Residential MSCCs. No target compounds were reported at concentrations greater than industrial/commercial MSCCs. 3.0 Risk Characterization Part I – Groundwater/Surface Water/Vapor Impacts High Risk 1. Has the release contaminated any water supply well including any well used for non-drinking purposes? YES / NO 2. Is a water supply well used for drinking water located within 1,000 feet of the source area of the release? YES / NO See Section 5.0. 3. Is a water supply well not used for drinking water (e.g., irrigation, washing cars, industrial cooling water, filling swimming pools) located within 250 feet of the source area of the release? YES / NO 4. Does groundwater within 500 feet of the source area of the release have the potential for future use (there is no other source of water supply other than the groundwater)? YES / NO Limited Site Assessment Guilford County Schools Bus Garage Incident No. 48452 131 Franklin Boulevard, Greensboro, Guilford County, North Carolina S&ME Project No. 22580197 December 6, 2022 5 5. Do vapors from the release pose a threat of explosion because of accumulation of the vapors in a confined space or pose any other serious threat to public health, public safety or the environment? YES / NO 6. Are there any other factors that would cause the release to pose an imminent danger to public health, public safety, or the environment? YES / NO Intermediate Risk 1. Is a surface water body located within 500 feet of the source area of the release? YES / NO See Section 5.3 2. Is the source area of the release located within an approved or planned wellhead protection area as defined in 42 USC 300h-7(e)? YES / NO 3. Is the release located in the Coastal Plain physiographic region as designated on a map entitled “Geology of North Carolina” published by the Department in 1985? YES / NO 4. Do the levels of groundwater contamination for any contaminant exceed the gross contamination levels established by the Department? YES / NO Part II - Land Use 1. Does the property contain one or more primary or secondary residences (permanent or temporary)? YES / NO 2. Does the property contain a school, daycare center, hospital, playground, park, recreation area, church, nursing home, or other place of public assembly? YES / NO 3. Does the property contain a commercial (e.g., retail, warehouse, office/business space, etc.) or industrial (e.g., manufacturing, utilities, industrial research and development, chemical/petroleum bulk storage, etc.) enterprise, an inactive commercial or industrial enterprise, or is the land undeveloped? YES / NO 4. Do children visit the property? YES / NO The property is used for vehicle maintenance, and is not used for children’s activities. Is access to the property reliably restricted consistent with its use (e.g., by fences, security personnel or both)? YES / NO 5. Do pavement, buildings, or other structures cap the contaminated soil? YES / NO 6. What is the zoning status of the property? The property is zoned LI (Light Industrial) (City of Greensboro GIS website). 7. Is the use of the property likely to change in the next 20 years? YES / NO 4.0 Property Surrounding Source Area of Release The questions below pertain to the area within 1,500 feet of the source area of the release. 1. What is the distance from the source area of the release to the nearest primary or secondary residence (permanent or temporary)? Limited Site Assessment Guilford County Schools Bus Garage Incident No. 48452 131 Franklin Boulevard, Greensboro, Guilford County, North Carolina S&ME Project No. 22580197 December 6, 2022 6 The nearest primary residential structure home is located approximately 150 feet south of the former UST. The property is located at 3900 Hahns Lane to the east of Franklin Boulevard in Greensboro, North Carolina. 2. What is the distance from the source area of the release to the nearest school, daycare center, hospital, playground, park, recreation area, church, nursing home or other place of public assembly? The nearest place of public assembly is Faith and Love Center of Christ Ministries located approximately 525 feet southwest of the former UST. 3. What is the zoning status of properties in the surrounding area? The adjoining property to the east is zoned R-5 (residential single family 5). The adjoining property to the north and east is zoned as PI (Public and Institutional). The adjoining property to the south is zoned as RM-12 (residential multi-family 12). 4. Briefly characterize the use and activities of the land in the surrounding area. The property is located along Franklin Boulevard. Properties near the subject property are used for institutional and residential purposes. 5.0 Receptor Information 5.1 Water Supply Wells S&ME conducted a visual reconnaissance from public rights-of-way of addresses located within a 1,500 feet radius of the site to observe water meters and possible water well structures on August 30, 2022. The locations of potential water supply well structures are summarized on Figure 5, Appendix I and in Table 3 in Appendix II. S&ME mailed survey questionnaire forms to the owners of four properties located within 500 feet of the source area. One undelivered form was returned to S&ME from Parcel ID 79449 (3900 Hahns Ln). Two survey forms were returned to S&ME and are included in Appendix V. The two returned forms indicated the properties use the public water supply as the primary drinking water source. 5.2 Public Water Supplies S&ME contacted the City of Greensboro Water Resources to confirm active water accounts with the utility for selected properties located within 1,000 feet of the source area (Appendix V). Active water accounts were confirmed by the City of Greensboro Water Resources for properties located along Franklin Boulevard. 5.3 Surface Water Based on Figure 1 and Figure 5, Appendix I, and on the aerial photograph available on the Guilford County GIS Webpage, the nearest surface water body is an unnamed stream located on the subject property approximately Limited Site Assessment Guilford County Schools Bus Garage Incident No. 48452 131 Franklin Boulevard, Greensboro, Guilford County, North Carolina S&ME Project No. 22580197 December 6, 2022 7 500 feet north of source area. The surface water body flows west to east and drains into South Buffalo Creek. South Buffalo Creek is classified as WS-V and NSW. Waters classified as WS-V are “protected as water supplies which are generally upstream and draining to Class WS-IV waters or waters used by industry to supply their employees with drinking water or as waters formerly used as water supply.” NSW is a supplemental classification “intended for waters needing additional nutrient management due to being subject to excessive growth of microscopic or macroscopic vegetation. 5.4 Wellhead Protection Area The source area is not known to be located within a Wellhead Protection Area as defined in 42 USC 300h-7(e), based upon a review of the corresponding webpage of the Public Water Supply Section of the Division of Environmental Health. 5.5 Subsurface Structures No subsurface vaults or structures were observed by S&ME on the property. 5.6 Property Owners and Occupants The property is owned and occupied by the Guilford County Board of Education (Guilford County GIS). 5.7 Sensitive Land Use Features The Faith and Love Center of Christ Ministries is located across Franklin Blvd approximately 525 feet from the former UST location. Falkener Elementary School and the Otis L. Hairston Middle School are located approximately 1,250 feet north of the subject property. 6.0 Site Geology and Hydrogeology According to the Geologic Map of North Carolina, dated 1985, the subject site is located within the Carolina Slate Belt, and is underlain by megacrystic, well foliated metamorphosed granitic rock from the late Proterozoic- Cambrian period. Soils in this region are typically composed of residual weathering products of the underlying parent rocks. This regolith is derived from the in-situ weathering of the underlying bedrock. A transitional zone of varying thicknesses typically exists between the unweathered bedrock and the overlying soil. Boring logs for soil borings MW-1are provided in Appendix IV. Figure 1, Appendix I, depicts the site location and topography of the surrounding area. Using topography as a guide to predict the direction of shallow groundwater flow, groundwater flow is expected to flow northeast. Limited Site Assessment Guilford County Schools Bus Garage Incident No. 48452 131 Franklin Boulevard, Greensboro, Guilford County, North Carolina S&ME Project No. 22580197 December 6, 2022 8 7.0 Sample Results 7.1 Soil Sampling Soil sampling was performed after the UST was removed, and additional soil was excavated. The results of laboratory analyses performed on soil samples is summarized in Table 1. 7.2 Groundwater Sampling On October 12, 2022, S&ME mobilized to the subject property with Environmental Drilling and Probing Services, LLC (EDPS) to install a groundwater monitoring well at the former UST location. Auger refusal was encountered at three locations within the former UST basin, at depths ranging from 11 to 15 feet below the land surface. Groundwater was not encountered in the three locations. Free product was not observed in the open boreholes. The boreholes with backfilled with soil cuttings. On October 19, 2022, returned to the site to install a monitoring well using air hammer techniques. Apparent partially weathered rock was encountered at approximately 14.5 feet below the land surface. Consolidated material was encountered at approximately 18 feet below the ground surface. Water was encountered at approximately 21 feet below the land surface. An apparent fracture was observed at approximately 22 feet below the land surface. One 2-inch diameter, PVC, Type II groundwater monitoring well, MW-1, was installed near the center of the UST excavation. The location of MW-1 is shown on Figure 4, Appendix I. MW-1 has a screened interval from 19.0 feet below ground surface to 29.0 feet below ground surface. MW-1 was secured with a locked, expandable cap and encased in a cover with bolt-down lid and flush-mount concrete pad. Well Construction details are summarized on Table 2, Appendix II. Well Construction Details and Well Construction Records for monitoring well MW-1 is included in Appendix IV. A submersible electric pump, using dedicated polyethylene tubing, was used to purge monitoring well MW-1 by evacuating the well to dryness on October 24, 2022. The well was unable to be purged of three well volumes due to the slow recharge rate. A groundwater sample was collected from monitoring well MW-1 with a disposable bailer on October 25, 2022. The sample was transferred into laboratory-provided containers using dedicated Nitrile gloves, placed into a cooler with ice, and shipped under chain-of-custody procedures to Eurofins Savannah. Groundwater Sampling Forms are provided in Appendix IV. The groundwater sample was submitted for analysis for volatile organic compounds by EPA Method 6200, semi-volatile organic compounds by EPA Method 625, base/neutrals and acids plus 10 largest non-target peaks, EPH and VPH by the MADEP method, and total lead and chromium by EPA Method 6010D. 7.3 Groundwater Analytical Results No target analytes were reported in the groundwater sample at concentrations greater than the laboratory detection limits. The analytical reports are provided in Appendix VI. Limited Site Assessment Guilford County Schools Bus Garage Incident No. 48452 131 Franklin Boulevard, Greensboro, Guilford County, North Carolina S&ME Project No. 22580197 December 6, 2022 9 7.4 Groundwater Occurrence On October 24, 2022, the depth to water in MW-1 was measured at 4.05 feet below top of casing. Free product, or light non-aqueous phase liquid, was not detected in monitoring well MW-1. Liquid level data is summarized on Table 2, Appendix II. 8.0 Conclusions The subject property is an active vehicle maintenance facility used for maintenance of the Guilford County Schools bus fleet. A release was discovered when the used oil UST was removed on April 22, 2022. Analytical results for soil samples collected from the excavation limits indicate multiple target analytes were detected at concentrations above the Soil-to-Water Maximum Soil Contaminant Concentrations (MSCC). C9-C22 aromatics were detected in two soil samples at concentrations greater than Residential MSCCs. No target compounds were reported at concentrations greater than industrial/commercial MSCCs. The laboratory did not report target analytes above the laboratory detection limits in the analyzed groundwater sample. Free product was not encountered during monitoring well installation activities. With your approval, S&ME provided a copy of this report to Mr. Jordan Lerew with the Guilford County Department of Public Health. Based on the information obtained for the LSA, the release incident discovered during removal of the used oil UST may be eligible for a Notice of No Further Action from NCDEQ after a Notice of Residual Petroleum and public notice is completed. Appendices Appendix I –Figures SCALE: DATE: PROJECT NUMBER FIGURE NO.Drawing Path: Z:\Shared\SME\Ops\ENV\Projects\2022\22580197_Greensboro County Schools_GCS Bus Garage Used Oil UST_Greensboro, NC\4 ENV\CAD\GCS Bus Garage SPPP-FIGS NOV.dwgN 0 2000 4000 (IN FEET)GRAPHIC SCALE (IN FEET)GRAPHIC SCALE GUILFORD COUNTY SCHOOLS BUS GARAGE GREENSBORO, NORTH CAROLINA 1 22580197 NOV 2022 AS SHOWNUSGS Topographic Map SITE SOURCE: McLEANSVILLE, NC AND GREENSBORO NC QUADRANGLES, 7.5-MINUTE SERIES US TOPOS (2019). icrosoft Corporation © 2022 Maxar ©CNES (2022) Distribution Airbus DS N 0 100 200 (IN FEET)GRAPHIC SCALE (IN FEET)GRAPHIC SCALE GUILFORD COUNTY SCHOOLS BUS GARAGE GREENSBORO, NORTH CAROLINA 2 22580197 NOV 2022 AS SHOWNSITE MAP SCALE: DATE: PROJECT NUMBER FIGURE NO.Drawing Path: Z:\Shared\SME\Ops\ENV\Projects\2022\22580197_Greensboro County Schools_GCS Bus Garage Used Oil UST_Greensboro, NC\4 ENV\CAD\GCS Bus Garage SPPP-FIGS NOV.dwgSource: Aerial images provided by Bing/Microsoft Corporation. FORMER UNDERGROUND STORAGE TANK (UST) EXCAVATION LOCATION S-5 S-2 S-1 S-8 S-3 S-4S-6 S-7 N 0 20 40 (IN FEET)GRAPHIC SCALE (IN FEET)GRAPHIC SCALE GUILFORD COUNTY SCHOOLS BUS GARAGE GREENSBORO, NORTH CAROLINA 3 22580197 NOV 2022 AS SHOWNSOIL SAMPLE LOCATIONS SCALE: DATE: PROJECT NUMBER FIGURE NO.Drawing Path: Z:\Shared\SME\Ops\ENV\Projects\2022\22580197_Greensboro County Schools_GCS Bus Garage Used Oil UST_Greensboro, NC\4 ENV\CAD\GCS Bus Garage SPPP-FIGS NOV.dwgLEGEND - FORMER UST EXCAVATION LIMITS - SOIL SAMPLE LOCATION FORMER UST LOCATION Source: Aerial images provided by Bing/Microsoft Corporation. MW-1 N 0 20 40 (IN FEET)GRAPHIC SCALE (IN FEET)GRAPHIC SCALE GUILFORD COUNTY SCHOOLS BUS GARAGE GREENSBORO, NORTH CAROLINA 4 22580197 NOV 2022 AS SHOWNMONITORING WELL LOCATION SCALE: DATE: PROJECT NUMBER FIGURE NO.Drawing Path: Z:\Shared\SME\Ops\ENV\Projects\2022\22580197_Greensboro County Schools_GCS Bus Garage Used Oil UST_Greensboro, NC\4 ENV\CAD\GCS Bus Garage SPPP-FIGS NOV.dwgLEGEND - FORMER UST EXCAVATION LIMITS - MONITORING WELL LOCATION FORMER UST LOCATION Source: Aerial images provided by Bing/Microsoft Corporation. 500' RADIUS 1000' RADIUS 1500' RADIUS W WSW-1 W WSW-4 W WSW-5 W WSW-9 W WSW-7W WSW-8 W WSW-6 W WSW-2 WWSW-3 N 0 500 1000 (IN FEET)GRAPHIC SCALE (IN FEET)GRAPHIC SCALE GUILFORD COUNTY SCHOOLS BUS GARAGE GREENSBORO, NORTH CAROLINA 5 22580197 NOV 2022 AS SHOWNPOTENTIAL WATER SUPPLY WELL STRUCTURES SCALE: DATE: PROJECT NUMBER FIGURE NO.Drawing Path: Z:\Shared\SME\Ops\ENV\Projects\2022\22580197_Greensboro County Schools_GCS Bus Garage Used Oil UST_Greensboro, NC\4 ENV\CAD\GCS Bus Garage SPPP-FIGS NOV.dwgLEGEND - OBSERVED WATER SUPPLY WELL STRUCTURE - STREAM Source: Aerial images provided by Bing/Microsoft Corporation. W Appendix II – Tables 1,1- Dichloroethane1,2,4-Trimethylbenzene1,3,5-Trimethylbenzene4-IsopropyltolueneAcetoneBenzeneEthylbenzeneIsopropylbenzeneNaphthalenen-Butyl Benzenen-Propyl Benzenesec-ButylbenzeneTetrachloroehteneTolueneVinyl ChlorideXylenes-TotalC9-C22 AromaticsC5-C8 AliphaticsC9-C18 AliphaticsC19-C36 AliphaticsBis(2-ethylhexyl)phthalate1-Methylnaphthaelne2-MethylnaphthaleneChromium-Total*Hexavalent ChromiumLead-TotalDate Collected (mm/dd/yy) Sample Type Sample Location mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg S-1 4/22/22 G Floor <0.00021 0.0027 0.00068 J <0.00014 <0.012 <0.00014 0.0012 <0.00013 0.0009 0.00074 J 0.00056 J <0.00081 <0.00024 <0.00020 <0.00020 0.0043 6.9 J <0.630 <1.28 82 0.096 J <0.030 <0.031 11.5 <0.16 <0.132 S-2 4/22/22 G Floor <0.00033 0.012 0.0056 0.0017 0.023 0.0027 0.0041 0.00090 J 0.0083 0.0038 0.0021 0.0017 0.0017 0.0044 <0.00031 0.023 93.7 J <1.03 <2.09 780 D 0.75 JD <0.22 <0.23 20.1 <0.24 <0.193 S-3 4/22/22 G Side Wall <0.097 13 D 3 D 0.22 JD <5.4 1.3 D 5.1 D 0.70 D <0.10 1.4 D 2.8 D 0.46 D <0.11 0.58 D <0.093 14 D 3619.6 46.6 14.2 2400 D 2.1 JD <0.58 <0.60 6.02 <0.16 <0.130 S-4 4/22/22 G Side Wall 0.00080 J 0.0022 0.00054 J <0.00014 0.012 J 0.004 0.0017 0.00062 J <0.00024 0.0015 0.00094 0.00091 0.00067 J 0.00076 J 0.0026 0.0058 66.56 <0.692 <1.40 210 JD 0.46 JD <0.16 <0.16 11.6 <0.17 <0.138 S-5 4/22/22 G Side Wall <0.059 2.4 D 0.58 D 0.17 D <2.7 0.20 D 0.57 D <0.029 0.99 D 0.63 D 0.41 D <0.19 0.25 D 1.1 D <0.047 3.6 D 1217.4 11.1 4.45 10,000 D 1.7 JD 0.44 JD 0.33 JD 10.3 <0.17 0.442 J S-6 4/22/22 G Side Wall <0.00035 0.0016 <0.00023 <0.00018 <0.016 0.00066 J 0.0017 <0.00017 0.26 JD 0.00078 J 0.00066 J <0.0011 0.0036 0.00074 J <0.00028 0.0057 36 <0.851 <1.73 180 D 0.17 J <0.031 <0.032 27.2 <0.17 <0.126 S-7 4/22/22 G Side Wall <0.00027 0.0065 0.0015 <0.00017 <0.015 0.0010 J 0.0038 <0.00016 0.0014 0.0010 J 0.0017 <0.0010 0.00067 J 0.0016 <0.00026 0.014 7.4 J <0.882 <1.79 19 0.14 J <0.029 <0.030 8.66 <0.16 0.434 J S-8 4/22/22 G Side Wall <0.00024 0.0023 0.00056 J <0.00016 <0.014 0.00093 J 0.0023 <0.00015 <0.00026 0.00071 J 0.00084 J <0.00092 <0.00027 0.00079 J <0.00023 0.0078 36 <0.856 <1.74 140 0.12 J <0.031 <0.032 18.6 <0.17 <0.139 C-1 4/22/22 G Characteri zation Sample NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA 45.6 NA 0.498 D 0.03 6.6 6.6 0.12 24 0.0072 8 1.3 0.2 2.4 1.4 2.2 0.005 5.4 0.00019 6 31 68 540 NS 6.6 0.004 3.6 360000 3.8 270 116 156 156 1560 14,000 12 60 1,560 5.5 782 1560 1560 93.8 1,250 0.921 3,120 469 625 1,560 31,200 46 20 63 23400 1.32 400 573 2,330 2,330 23,300 210,000 59 297 23,300 27 11,600 23,300 23,300 1,400 18,600 4.54 46,700 7,000 9,340 23,300 467,000 410 100 1,635 350,000 6.54 400 Notes: MSCC = Maximum Soil Contaminant Concentrations, March 7, 2022 D = Analyzed at dilution NA- Not Analyzed "C"-Sample was collected in backfill material surrounding UST * - Chromium III MSCC values used as reference "S" = Samples were collected in residual soil below backfill material Industrial Commercial Soil Cleanup Levels NS J = Estimated Value NS = No Standard Indicates concentration greater than Soil-to-water MSCC mg/kg = milligrams per kilogram Indicates concentration greater than Residential Soil Cleanup Levels NA 2400 D Soil-to-Water MSCC (mg/kg)NS Residential Soil Cleenup Levels (mg/kg)NS NA NA NA NA NA NA Diesel Range Sample ID Constituent DRO (C10-C28) mg/kg NA Table 1 Summary of Soil Sampling Results GCS Bus Garage UST Removal 131 Franklin Blvd, Greensboro, North Carolina 27405 S&ME Project No. 22580197 Analytical Method Volatile Organic Compounds by EPA Method 8260 MADEP EPH & VPH Semi Volatile Organic Metals by EPA Method Well ID Date Installed Well Diameter Screened Interval Bottom of Well Date Measured Depth to Water (inches) (feet below top of casing) (ft. bgs) (feet below top of casing) MW-1 10/19/2022 2 19.0 - 29.0 29.5 10/24/2022 4.05 Table 2Well Construction InformationGCS Bus Garage UST RemovalGreensboro, North CarolinaS&ME Project No. 22580197 Map I.D.*Parcel Number Owner Name Mailing Address 1 Mailing Address City Mailing Address State Mailing Address Zip Property Address 1 22281 RDC Real Estate Solutions Inc PO Box 19511 Greensboro NC 27419 3803 Dawson Ave 2 22137 EPOCF3A LLC 2301 E Riverside Dr A200 Austin TX 78741 221 Guerrant St 3 22129 Terald and Goioa Garrett 3809 Phillips Park Drive Greensboro NC 27401 2809 Phillips Park Drive 4 79440 Family Trust of Pauline G. Jones 101 Ravens Bluff Court Browns Summit NC 27214 401 Franklin Blvd 5 79416 Twanda Mitchell 307 Franklin Blvd Greensboro NC 27401 307 Franklin Blvd 6 79437 Pauline and Joe Vail 3924 Eastland Ave Greensboro NC 27401 3924 Eastland Ave 7 79501 Honorio Carbajal 604 Herman Gist Rd Greensboro NC 27401 3926 Eastland Ave 8 79435 RM Property Solutions LLC PO Box 839 Pleasant Garden NC 27313 3932 Eastland Ave 9 79441 Maria De Jesus Flores and Amadeo Cortes Gutierrez 3031 Glass Rd Greensboro NC 27406 403 Franklin Blvd 1,158 1,169 Table 3 Potential Water Supply Well Structures GCS Bus Garage UST Removal Greensboro, NC S&ME Project No. 22580197 1,229 Distance from UST 1,340 1,386 1,425 1,108 937 1,078 Appendix III – UST Documents UST-3 Notice of Intent: UST Permanent Closure or Change-in-Service Return completed form to: The DWM Regional Office located in the area where the facility is located. Also send a copy to the Central Office in Raleigh. SEE MAP ON THE BACK OF THIS FORM FOR THE CENTRAL AND REGIONAL OFFICE ADDRESSES. STATE USE ONLY I.D. #_____________________ Date Received______________ INSTRUCTIONS (READ THIS FIRST) Complete and return a UST-3 form at least thirty (30) days prior to closure or change-in-service activities. Completed UST closure or change-in-service site assessment reports, along with a copy of the UST-2A and/or 2B forms, should be submitted to the appropriate Division of Waste Management (DWM) Regional Office within thirty (30) days following closure activities. The UST-2 form should also be submitted to the Central Office in Raleigh so that the status of the tanks may be changed to permanently closed and your tank fee account can be closed out. Note: Tank fees may be due for unregistered tanks. UST closure and change-in-service site assessments must be completed in accordance with the latest version of the Guidelines for Site Checks, Tank Closure and Initial Response. The guidelines can be obtained at https://deq.nc.gov/about/divisions/waste-management/ust. Note: To close tanks in place you must obtain prior approval from the DWM Regional office located in the region where the facility is located. You must make sure that USTs removed from your property are disposed of properly. When choosing a closure contractor, ask where the tank(s) will be taken for disposal. Usually, USTs are cleaned and cut up for scrap metal. This is dangerous work and must be performed by a qualified company. Tanks disposed of illegally in fields or other dumpsites can leak petroleum products and sludge into the environment. If your tanks are disposed of improperly, you could be held responsible for the cleanup of any environmental damage that occurs. I. OWNERSHIP OF TANKS II. LOCATION Owner Name (Corporation, Individual, Public Agency, or Other Entity) Facility Name or Company Street Address Facility ID # (If known) City County Street Address State Zip Code City County Zip Code Phone Number Email Phone Number III. CONTACT PERSONNEL Name: Company Name: Job Title: Phone Number: IV. TANK REMOVAL, CLOSURE IN PLACE, CHANGE-IN SERVICE 1. Contact local fire marshal. 2. Plan entire closure event. 3. Conduct Site Soil Assessment. 4. If removing tanks or closing in place, refer to API Publication 2015 Cleaning Petroleum Storage Tanks and 1604 Removal and Disposal of Used Underground Petroleum Storage Tanks. 5. Provide a sketch locating piping, tanks and soil sampling locations. 6. Submit a closure report in the format of UST- 12 (including the form UST-2) within thirty (30) days following the site investigation. 7. If a release from the tanks has occurred, the site assessment portion of the tank closure must be conducted under the supervision of a P.E. or L.G., with all closure site assessment reports bearing the signature and seal of the P.E. or L.G. If a release has not occurred, the supervision, signature or seal of a P.E. or L.G. is not required. 8. Keep closure records for three (3) years. V. WORK TO BE PERFORMED BY Contractor Name: Contractor Company Name: Address: State: Zip Code: Phone No: Primary Consultant Name: Primary Consultant Company Name: Consultant Phone No: VI. TANKS SCHEDULED FOR CLOSURE OR CHANGE-IN-SERVICE Tank ID No. Size in Gallons Last Contents Proposed Activity Closure Change-In-Service Removal Abandonment in Place * New Contents Stored * Prior written approval to abandon a tank in place must be received from a DWM Regional Office. VII. OWNER OR OWNER’S AUTHORIZED REPRESENTATIVE Has a release from a UST system occurred at this location? Yes No Unknown I understand that I can be held responsible for environmental damage resulting from the improper disposal of my USTs. Print name and official title: Signature Date Signed SCHEDULED REMOVAL DATE Notify your DWM Regional Office 48 hours before this date if scheduled removal date changes UST-3 Rev 2/2021 Guilford County Schools 131 Franklin Blvd. Greensboro Guilford NC 27405 (888) 511-4427 gcs-transportation@gcsnc.com Guilford County Schools Bus Garage 131 Franklin Blvd. Greensboro Guilford 27405 (888) 511-4427 David Kemp Program Administrator IIGuilford County Schools 336-471-3218 David Kemp Guilford County Schools 131 Franklin Blvd.27405 336-471-3218 Wayne Watterson S&ME NC 336-908-7653 NA 1000 Oil Wayne Watterson as Agent of Guilford County Schools 4/22/22 UST-2B Site Investigation Report for Permanent Closure or Change-in- Service of UN-REGISTERED UST Return completed form to: NC DEQ / DWM / UST SECTION 1646 MAIL SERVICE CENTER RALEIGH, NC 27699-1646 ATTN: REGISTRATION & PERMITTING phone (919) 707-8171 fax (919) 715-1117 http://www.wastenotnc.org/ STATE USE ONLY: Facility ID # Date Received INSTRUCTIONS (READ THIS FIRST) 1. UST permanent closure or change in service must be completed in accordance with the latest version of the Guidelines for Site Checks, Tank Closure and Initial Response and Abatement. The guidelines can be obtained at http://deq.nc.gov/about/divisions/waste-management/waste- management-permit-guidance/underground-storage-tanks-section. 2. Permanent closure: Complete all sections of this form. 3. Change-in-service: Where UST systems will be converted from storing a regulated substance to a non-regulated substance, complete sections I, II, III, IV, and VI. 4. For more than 5 un-registered UST systems, attach additional forms as needed. 5. Un-Registered USTs may be subject to unpaid fees and late penalties. 6. REGISTERED USTs use Form UST-2A. I. OWNERSHIP OF TANKS II. LOCATION OF TANKS Owner Name (Corporation, Individual, Public Agency, or Other Entity) Facility Name or Company Street Address Facility ID # (If known) City County Street Address State Zip Code City County Zip Code Phone Number Phone Number III. CONTACT PERSONNEL Contact for Facility: Job Title: Phone #: Closure Contractor Name: Closure Contractor Company: Address: Phone # Primary Consultant Name: Primary Consultant Company: Address: Phone # IV. UST INFORMATION FOR UN-REGISTERED UST SYSTEMS REGISTERED USTs use Form UST-2A. V. EXCAVATION CONDITION Tank ID No. Size in Gallons Last Contents Last Use Date Permanent Close Date Method of Permanent Closure: Indicate REMOVED or enter fill material, such as foam/ concrete/ sand Change-in- Service Date Water in excavation Free product Notable odor or visible soil contamination Yes No Yes No Yes No VI. CERTIFICATION I certify under penalty of law that I have personally examined and am familiar with the information submitted in this and all attached documents and that based on my inquiry of those individuals immediately responsible for obtaining the information, I believe that the submitted information is true accurate and complete. Print name and official title of owner or owner’s authorized representative Signature Date Signed NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY, DIVISION OF WASTE MANAGEMENT, UST SECTION 1646 MAIL SERVICE CENTER, RALEIGH, NC 27699-1646 PHONE (919) 707-8171 FAX (919) 715-1117 http://www.wastenotnc.org/ 1/2016 Guilford County Schools 131 Franklin Blvd Greensboro Guilford North Carolina 27405 888-511-4427 Guilford County Schools Bus Garage 131 Franklin Blvd. Greensboro 27405Guilford 888-511-4427 David Kemp Program Admin II 336-471-3218 David Kemp Guilford County Schools 336-471-3218131 Franklin Blvd. Wayne Watterson S&ME 336-908-74538646 W Market Street NA 1000 Used Oil 4/22/22 4/22/22 REMOVED 4/22/22 n n n Wayne Watterson as Agent of Guilford County Schools 6/3/2022 UST-61 24-Hour Release and UST Leak Reporting Form. For Releases in NC This form should be completed and submitted to the UST Section’s regional office following a known or suspected release from an underground storage tank (UST) system. This form is required to be submitted within 24 hours of discovery of a known or suspected release (DWM USE ONLY) Incident # ________ Risk (H,I,L,U)_______ Received On ________ Received By ________ Reported by (circle one): Phone, Fax or Report Region _______ Suspected Contamination? (Y/N) ________ Confirmed GW Contamination? (Y/N) ______ Confirmed Soil Contamination ?(Y/N) ______ Samples Taken?(Y/N) ______ Free Product? (Y/N) _____ If Yes, State Greatest Thickness ______________ Facility ID Number ______________ Date Leak Discovered ___________ Comm/Non-Commercial? ________ Reg/Non-regulated? _____________ INCIDENT DESCRIPTION Incident Name: Address: County: City/Town: Zip Code: Regional Office (circle one): Asheville, Mooresville, Fayetteville, Raleigh, Washington, Wilmington, Winston-Salem Latitude (decimal degrees): Longitude (decimal degrees) : Obtained by: Briefly describe suspected or confirmed release: (including but not limited to: nature of release, date of release, amount of release, amount of free product present and recovery efforts, initial responses conducted, impacts to receptors)  GPS  Topographic map  GIS Address matching  Other  Unknown Describe location: HOW RELEASE WAS DISCOVERED (Release Code) (Check one)  Release Detection Equipment or Methods  During UST Closure/Removal  Property Transfer  Visual/Odor  Water in Tank  Water Supply Well Contamination  Groundwater Contamination  Surface Water Contamination  Other (specify) _______________ SOURCE OF CONTAMINATION Source of Release (Check primary source) Cause of Release (Check primary cause) Type of Release (Check one) Product Type Released (Check primary product type released)  Tank  Piping  Dispenser  Submersible Turbine Pump  Delivery Problem  Spill Bucket  Other  Unknown Definitions presented on reverse  Spill  Overfill  Corrosion  Physical/Mechanical Damage  Install Problem  Other  Unknown Definitions presented on reverse  Petroleum  Non-Petroleum  Both Location (Check one)  Facility  Residence  Other  Gasoline/ Diesel/ Kerosene  Heating Oil  Other Petroleum Products  Metals  Other Inorganics  Other Organics  Diesel/Veg. Oil Blend  Vegetable Oil 100%  E10 – E20  E21 – E84  E85 – E99  Ethanol 100%  E01 – E09 Ownership 1. Municipal 2. Military 3. Unknown 4. Private 5. Federal 6. County 7. State Operation Type 1. Public Service 2. Agricultural 3. Residential 4. Education/Relig. 5. Industrial 6. Commercial 7. Mining UST Form 61 (02/19) Page 1 of 2 Y NYYYUnknown NA4/22/22CommReg Guilford County Schools Bus Garage 131 Franklin Blvd. Guilford Greensboro 27405 36.078610 -79.738750 X An unknown amount of used oil was released from the unregistered regulated 1,000-gallon steel UST over an unknown amount of time. The release was discovered on April 22, 2022. The release was likely spillage or overflow from the fill port. Tank was removed, tank basin was over excavated, and samples were collected along the side walls and floor of tank basin. Jordan Lerew of Guilford County Department of Health and Human Services was onsite the date of the discovery. X X X X X X IMPACT ON DRINKING WATER SUPPLIES Water Supply Wells Affected? 1. Yes 2. No 3. Unknown Number of Water Supply Wells Affected __________________ Water Supply Wells Contaminated: (Include Users Names, Addresses and Phone Numbers. Attach additional sheet if necessary) 1. 2. 3. UST SYSTEM OWNER UST Owner/Company Point of Contact Address City State Zip Code Telephone Number UST SYSTEM OPERATOR UST Operator/Company Address City State Zip Code Telephone Number LANDOWNER AT LOCATION OF UST INCIDENT Landowner Address City State Zip Code Telephone Number Draw Sketch of Area (showing two major road intersections) or Attach Map Person Reporting Incident Company Telephone Number Title Address Date UST Form 61 (02/19) Page 2 of 2 Definitions of Sources Tank: means the tank that stores the product and is part of the underground storage tank system Piping: means the piping and connectors running from the tank or submersible turbine pump to the dispenser or other end-use equipment (Vent, vapor recovery, or fill lines are excluded.) Dispenser: includes the dispenser and the equipment used to connect the dispenser to the piping (e.g., a release from a suction pump or from components located above the shear valve) Submersible Turbine Pump (STP) Area includes the submersible turbine pump head (typically located in the tank sump), the line leak detector, and the piping that connects the submersible turbine pump to the tank Delivery Problem: identifies releases that occurred during product delivery to the tank. (Typical causes associated with this source are spills and overfills.) Other: serves as the option to use when the release source is known but does not fit into one of the preceding categories (e.g., for releases from vent lines, vapor recovery lines, and fill lines) Unknown: identifies releases for which the source has not been determined Definitions of Causes Spill: use this cause when a spill occurs (e.g., when the delivery hose is disconnected from the tank fill pipe or when the nozzle is removed from the dispenser) Overfill: use when an overfill occurs (e.g., overfills may occur from the fill pipe at the tank or when the nozzle fails to shut off at the dispenser) Physical or Mechanical Damage: use for all types of physical or mechanical damage, except corrosion (e.g., puncture of tank or piping, loose fittings, broken components, and components that have changed dimension) Corrosion: use when a metal tank, piping, or other component has a release due to corrosion (e.g., for steel, corrosion takes the form of rust) Installation Problem: use when the problem is determined to have occurred specifically because the UST system was not installed properly Other: use this option when the cause is known but does not fit into one of the preceding categories (e.g., putting regulated substances into monitoring wells) Unknown: use when the cause has not been determined 3. Unknown Guilford County Schools David Kemp 131 Franklin Blvd. Greensboro NC 27405 (888) 511-4427 Guilford County Schools 131 Franklin Blvd. Greensboro NC 27405 (888) 511-4427 Guilford County Schools 131 Franklin Blvd. Greensboro NC 27405 (888) 511-4427 Map Attached Cody McMechen S&ME 828-318-3219 Staff Professional 8648 W. Market Street, Ste. 105, Greensboro, NC 5/17/22 Appendix IV – Field Forms Hours Mileage Signature of S&ME Personnel 6 26 S&ME, Inc. | www.smeinc.com Environmental Field Report Date: 10/19/2022 Job Number: 22580197 Project Name: GCS Bus Garage Weather/Temperature: Clear, windy, 50 °F Project Location: 131 Franklin Boulevard, Greensboro, North Carolina Notes By: ☒ Present at the Site: L. Butler ☐ EDPS- Jarod Paulos-driller, crew- Braxton Cronoser 9:30- Pack and mobilize to site. 10:10- Drill crew arrived and set-up to drill at center of UST basin with 4-inch diameter air hammer bit. 2-inch diameter post monitor well and a stick-up PVC casing are located approximately 50 feet SE of UST basin. Well- depth to water: 2.8 feet below ground surface (ft-bgs), total depth: 8.6 ft-bgs (no tag). Casing- depth to water: 2.7 ft-bgs; total depth: 12.7 ft-bgs (no cap). 10:45- Crew started borehole with air hammer bit. At 14 ft-bgs, stopped due to water coming to ground surface. After removing rods, borehole cave in observed at 6 ft-bgs with water at 5 ft-bgs. Crew drilled with 4-1/4-inch ID hollow stem augers to 14.5 ft-bgs; difficult drilling at 13 ft-bgs. 11:45- Crew switched set-up back to air hammer. Encountered apparent partially weathered rock at 14.5 ft-bgs and rock at approximately 18 ft-bgs. Cuttings consisted of dry dust and sand. Encountered first water at approximately 21 ft-bgs. Crew observed apparent fracture at approximately 22 ft-bgs. 12:08- Stop at 28 ft-bgs to check for water. Fuel odors were not observed. 12:13- Blew water/mud from borehole; continued drilling to 29.5 ft-bgs. 12:25- Crew removed rods. Monitor well casing set and raised for total depth of 29.2 ft-bgs, with screened interval from 19-29 ft-bgs. Sand pack placed to 15.5 ft-bgs. Bentonite seal placed to 4 ft-bgs. Subsurface observations and well construction are summarized on boring log and well detail forms. 13:00- Crew moved cuttings to grassed area located southwest of former UST basin. Crew began well development; well went dry, water muddy. Crew cleaned up site and loaded rig and tooling. Crew grouted borehole and constructed concrete pad around 8-inch diameter cover with bold-down lid. 14:40- Demobe . Returned to office to download and file logs. Equipment Used Water level probe ° F Date Time 10/25/22 10:50 4.1 10.0 10/25/22 10:50 µS/cm 4.05 ft-TOC inch 29.20 ft-TOC gal 25.15 feet gal 10 ft-GRD gal ft-GRD 15:45 End Time: gal Time pH Temp Cond Turbidity (s.u.)(°C) µS/cm (NTU) 11:00 6.4 21.9 404 11:00 Qty Container Pres.Qty Pres. (1) Notes: Form Revision Date: 30Purge Time (Min.): GROUNDWATER SAMPLING FORM Project Name: Project Location: Project Number: Source Well: GCS Bus Garage UST Closure 119 Franklin Boulevard 22580197 MW-1 Purge Date:October 24, 2022 Analytical Data Method Method Cody McMechen developed and purged well on October 24, 2022 @ 16:15. Water level on 10/24/22 was 4.05 ft btoc before purging. Water level on 10/25/22 was 5.80 ft btoc. 9/13/17 8:00 AM Name Signature Colby Paine Date 12/6/2022 Container Sample Method:Sample Time:Bailer 6.0 No Odors Total Volume Purged:6.0 Well Purged Dry?:No Field Parameters Cumulative Volume Comments (Gal) Stickup Height: Well Purging Information Purge Method:Bailer Purge Start Time:16:15 Total Well Depth:Well Volume Height of Water Column:3 * Well Volume Screen Length:5 * Well Volume 4.1 12.3 20.5 Water Level & Well Data Measuring Point:Top of Casing Well Volume Depth to Water:Well Diameter Conductivity 1,413 1,415 6.9 µS/cm 2 Equipment Calibration Information: Equipment Calibration Solution Calibration Check pH 4.00, 7.00, 10.00 Air Temp: October 25, 2022 65 11:00Sample Time: Sample Date: Weather: Locked?: Sampled By: Yes Colby Paine Sunny Hours Mileage Signature of S&ME Personnel 1.0 hr (onsite) 45 S&ME, Inc. | www.smeinc.com Environmental Field Report Date: 10/25/2022 Job Number: 22580197 Project Name: GCS Bus Garage UST Closure Weather/Temperature: Sunny/65 Project Location: 119 Franklin Boulevard, Greensboro, NC Notes By: ☒ Present at the Site: Colby Paine ☐ Onsite to collect a water sample from MW-1. Cody McMechen purged the well on 10/24/2022, so only needed to collect a grab sample from the well. I removed the well cap and let the water level equilibrate before measuring depth to water. The depth to water was measured at 5.80 feet below the top of casing. After measuring depth to water, I prepared my sampling equipment and the sample bottles. I slowly lowered the bailer down into the well and collected water from the top. I collected the metals sample first to limit the number of suspended solids in the sample. I filled the remainder of the sample bottles and placed each of them in a cooler on ice. I collected temperature, pH, and conductivity readings before closing the well. After closing the well, I left the site to prepare the samples for shipping to Eurofins CEI in Cary, NC. I brought the samples to FedEx for shipment. Equipment Used Bailer and string pH Multimeter Appendix V – Receptor Survey Information Appendix VI – Laboratory Analytical Reports Well ID MW-1 S&ME Staff L. Butler Drill Rig Geoprobe 7822DT Water Level at TOB (0.01 ft-BTOC)Land Surface Elev. (0.01 ft) Depth to Water (0.01 ft-BTOC) Stickup Height - ft TOC Relative to Ground ft 0.0 to 19.0 19.0 to 29.0 Top of Seal - 4.0 0.1 ft-bgs Top of Filter Pack - 15.5 0.1 ft-bgs 0.0 to 4.0 Top of Screen - 19.0 0.1 ft-bgs 4.0 to 15.5 Screened Interval -10.0 0.1 ft-bgs 15.5 to 29.5 Bottom of Screen - 29.0 0.1 ft-bgs Bottom of Filter Pack - 29.5 0.1 ft-bgs Cave In - 0.1 ft-bgs Total Boring Depth - 29.5 0.1 ft-bgs Form Revision Date: County Drilling Contractor Drilling Method Well Type / Use City Flush Monitor Well Guillford Greensboro License Number Well Permit Number Not applicable 29.2 Dry Northing (0.1 ft)Date/Time 10-19-22/12:25 Total Well Depth (0.1 ft-bgs) Environmental Drilling & Probing Services, LLC Easting (0.1 ft)Date/Time Installation Date 10/19/2022 Project Name GCS Bus Garage Project Number 22580197 WELL CONSTRUCTION DETAIL Filter Pack Interval (0.1 ft-bgs) Screen Interval (0.1 ft-bgs) Grout Type #2 Silica Sand 3/8 in. Holeplug® Pad Type Protective Casing Casing Material Depth Below Ground Surface (ft-bgs) Air Hammer 2' x 2' Concrete Flush Vault (8" diam) Seal Type 2-in Sch 40 PVC (0.010) Portland Cement T2 2-in Sch 40 PVC Casing Interval (0.1 ft-bgs) Screen Type Borehole Diameter (1 in) 4-inch 9/1/17 2:10 PM TBD - To Be Determined Notes: Seal Interval (0.1 ft-bgs) Filter Pack Grout Interval (0.1 ft-bgs) Development Volume (gal) Development Yes For lithologic information see attached boring log 5 BTOC - Below Top of Casing ANALYTICAL REPORT Eurofins Savannah 5102 LaRoche Avenue Savannah, GA 31404 Tel: (912)354-7858 Laboratory Job ID: 680-224036-1 Client Project/Site: GCS Bus Garage For: S&ME, Inc. 8646 West Market Street Suite 105 Greensboro, North Carolina 27409 Attn: Cody McMechen Authorized for release by: 11/14/2022 5:21:45 PM John Andros, Project Manager I (404)944-4744 John.Andros@et.eurofinsus.com Designee for Chad Bechtold, Project Manager (813)690-3563 Chad.Bechtold@et.eurofinsus.com The test results in this report meet all 2003 NELAC, 2009 TNI, and 2016 TNI requirements for accredited parameters, exceptions are noted in this report. This report may not be reproduced except in full, and with written approval from the laboratory. For questions please contact the Project Manager at the e-mail address or telephone number listed on this page. This report has been electronically signed and authorized by the signatory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature. Results relate only to the items tested and the sample(s) as received by the laboratory. The test results in this report relate only to the samples as received by the laboratory and will meet all requirements of the methodology, with any exceptions noted. This report shall not be reproduced except in full, without the express written approval of the laboratory. All questions should be directed to the {0} Project Manager. 1 2 3 4 5 6 7 8 9 10 11 12 Definitions/Glossary Job ID: 680-224036-1Client: S&ME, Inc. Project/Site: GCS Bus Garage Qualifiers GC/MS Semi VOA Qualifier Description J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. Qualifier Glossary These commonly used abbreviations may or may not be present in this report. ¤Listed under the "D" column to designate that the result is reported on a dry weight basis Abbreviation %R Percent Recovery CFL Contains Free Liquid CFU Colony Forming Unit CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) Dil Fac Dilution Factor DL Detection Limit (DoD/DOE) DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample DLC Decision Level Concentration (Radiochemistry) EDL Estimated Detection Limit (Dioxin) LOD Limit of Detection (DoD/DOE) LOQ Limit of Quantitation (DoD/DOE) MCL EPA recommended "Maximum Contaminant Level" MDA Minimum Detectable Activity (Radiochemistry) MDC Minimum Detectable Concentration (Radiochemistry) MDL Method Detection Limit ML Minimum Level (Dioxin) MPN Most Probable Number MQL Method Quantitation Limit NC Not Calculated ND Not Detected at the reporting limit (or MDL or EDL if shown) NEG Negative / Absent POS Positive / Present PQL Practical Quantitation Limit PRES Presumptive QC Quality Control RER Relative Error Ratio (Radiochemistry) RL Reporting Limit or Requested Limit (Radiochemistry) RPD Relative Percent Difference, a measure of the relative difference between two points TEF Toxicity Equivalent Factor (Dioxin) TEQ Toxicity Equivalent Quotient (Dioxin) TNTC Too Numerous To Count Eurofins Savannah Page 2 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 Sample Summary Client: S&ME, Inc.Job ID: 680-224036-1 Project/Site: GCS Bus Garage Lab Sample ID Client Sample ID Matrix Collected Received 680-224036-1 MW-1 Ground Water 10/25/22 11:00 10/26/22 10:30 Eurofins SavannahPage 3 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 Case Narrative Client: S&ME, Inc.Job ID: 680-224036-1 Project/Site: GCS Bus Garage Job ID: 680-224036-1 Laboratory: Eurofins Savannah Narrative Job Narrative 680-224036-1 Receipt The sample was received on 10/26/2022 10:30 AM. Unless otherwise noted below, the sample arrived in good condition, and, where required, properly preserved and on ice. The temperature of the cooler at receipt time was 0.9°C GC/MS VOA No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page. GC/MS Semi VOA No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page. Hydrocarbons No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page. Hydrocarbons No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page. Metals No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page. Eurofins SavannahPage 4 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 Client Sample Results Job ID: 680-224036-1Client: S&ME, Inc. Project/Site: GCS Bus Garage Lab Sample ID: 680-224036-1Client Sample ID: MW-1 Matrix: Ground WaterDate Collected: 10/25/22 11:00 Date Received: 10/26/22 10:30 Method: SM6200-B - Volatile Organic Compounds RL MDL ND 25.0 10.0 ug/L 11/05/22 16:32 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Acetone 1.00 0.130 ug/L 11/05/22 16:32 1NDBenzene 1.00 0.540 ug/L 11/05/22 16:32 1NDBromobenzene 5.00 0.250 ug/L 11/05/22 16:32 1NDBromoform 1.00 0.980 ug/L 11/05/22 16:32 1NDBromomethane 25.0 2.60 ug/L 11/05/22 16:32 1ND2-Butanone (MEK) 1.00 0.190 ug/L 11/05/22 16:32 1NDCarbon tetrachloride 1.00 0.150 ug/L 11/05/22 16:32 1NDChlorobenzene 1.00 0.210 ug/L 11/05/22 16:32 1NDChlorobromomethane 1.00 0.240 ug/L 11/05/22 16:32 1NDChlorodibromomethane 1.00 0.760 ug/L 11/05/22 16:32 1NDChloroethane 1.00 1.00 ug/L 11/05/22 16:32 1NDChloroform 1.00 0.320 ug/L 11/05/22 16:32 1NDChloromethane 1.00 0.570 ug/L 11/05/22 16:32 1ND2-Chlorotoluene 1.00 0.560 ug/L 11/05/22 16:32 1ND4-Chlorotoluene 1.00 0.200 ug/L 11/05/22 16:32 1NDcis-1,2-Dichloroethene 5.00 0.500 ug/L 11/05/22 16:32 1NDcis-1,3-Dichloropropene 5.00 0.220 ug/L 11/05/22 16:32 1NDDibromomethane 1.00 0.500 ug/L 11/05/22 16:32 1ND1,2-Dichlorobenzene 1.00 0.540 ug/L 11/05/22 16:32 1ND1,3-Dichlorobenzene 1.00 0.640 ug/L 11/05/22 16:32 1ND1,4-Dichlorobenzene 1.00 0.500 ug/L 11/05/22 16:32 1NDDichlorobromomethane 1.00 0.850 ug/L 11/05/22 16:32 1NDDichlorodifluoromethane 1.00 0.500 ug/L 11/05/22 16:32 1ND1,1-Dichloroethane 1.00 0.190 ug/L 11/05/22 16:32 1ND1,2-Dichloroethane 1.00 0.500 ug/L 11/05/22 16:32 1ND1,1-Dichloroethene 1.00 0.500 ug/L 11/05/22 16:32 1ND1,2-Dichloropropane 1.00 0.500 ug/L 11/05/22 16:32 1ND1,3-Dichloropropane 1.00 0.500 ug/L 11/05/22 16:32 1ND2,2-Dichloropropane 1.00 0.500 ug/L 11/05/22 16:32 1ND1,1-Dichloropropene 20.0 12.0 ug/L 11/05/22 16:32 1ND3,3-Dimethyl-1-butanol 100 24.0 ug/L 11/05/22 16:32 1NDEthanol 1.00 0.500 ug/L 11/05/22 16:32 1NDEthylbenzene 1.00 0.230 ug/L 11/05/22 16:32 1NDEthylene Dibromide 25.0 1.40 ug/L 11/05/22 16:32 1ND2-Hexanone 1.00 0.530 ug/L 11/05/22 16:32 1NDIsopropylbenzene 1.00 0.200 ug/L 11/05/22 16:32 1NDIsopropyl ether 1.00 0.710 ug/L 11/05/22 16:32 1ND4-Isopropyltoluene 5.00 3.00 ug/L 11/05/22 16:32 1NDMethylene Chloride 25.0 1.80 ug/L 11/05/22 16:32 1ND4-Methyl-2-pentanone (MIBK) 1.00 0.220 ug/L 11/05/22 16:32 1NDMethyl tert-butyl ether 5.00 0.630 ug/L 11/05/22 16:32 1NDm-Xylene & p-Xylene 5.00 3.00 ug/L 11/05/22 16:32 1NDNaphthalene 1.00 0.760 ug/L 11/05/22 16:32 1NDn-Butylbenzene 1.00 0.690 ug/L 11/05/22 16:32 1NDN-Propylbenzene 5.00 0.600 ug/L 11/05/22 16:32 1NDo-Xylene 1.00 0.700 ug/L 11/05/22 16:32 1NDsec-Butylbenzene 1.00 1.00 ug/L 11/05/22 16:32 1NDStyrene 10.0 4.50 ug/L 11/05/22 16:32 1NDt-Amyl alcohol Eurofins Savannah Page 5 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 Client Sample Results Job ID: 680-224036-1Client: S&ME, Inc. Project/Site: GCS Bus Garage Lab Sample ID: 680-224036-1Client Sample ID: MW-1 Matrix: Ground WaterDate Collected: 10/25/22 11:00 Date Received: 10/26/22 10:30 Method: SM6200-B - Volatile Organic Compounds (Continued) RL MDL ND 1.00 0.230 ug/L 11/05/22 16:32 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Tert-amyl methyl ether 1.00 0.630 ug/L 11/05/22 16:32 1NDtert-Butylbenzene 1.00 0.280 ug/L 11/05/22 16:32 1NDTert-butyl ethyl ether 10.0 2.40 ug/L 11/05/22 16:32 1NDtert-Butyl Formate 1.00 0.160 ug/L 11/05/22 16:32 1ND1,1,1,2-Tetrachloroethane 1.00 0.500 ug/L 11/05/22 16:32 1ND1,1,2,2-Tetrachloroethane 1.00 0.900 ug/L 11/05/22 16:32 1NDTetrachloroethene 1.00 0.410 ug/L 11/05/22 16:32 1NDToluene 1.00 0.500 ug/L 11/05/22 16:32 1NDtrans-1,2-Dichloroethene 5.00 0.200 ug/L 11/05/22 16:32 1NDtrans-1,3-Dichloropropene 1.00 0.900 ug/L 11/05/22 16:32 1ND1,2,3-Trichlorobenzene 1.00 0.820 ug/L 11/05/22 16:32 1ND1,2,4-Trichlorobenzene 1.00 0.180 ug/L 11/05/22 16:32 1ND1,1,1-Trichloroethane 5.00 0.210 ug/L 11/05/22 16:32 1ND1,1,2-Trichloroethane 1.00 0.150 ug/L 11/05/22 16:32 1NDTrichloroethene 1.00 0.520 ug/L 11/05/22 16:32 1NDTrichlorofluoromethane 5.00 0.840 ug/L 11/05/22 16:32 1ND1,2,3-Trichloropropane 1.00 0.820 ug/L 11/05/22 16:32 1ND1,2,4-Trimethylbenzene 1.00 0.560 ug/L 11/05/22 16:32 1ND1,3,5-Trimethylbenzene 25.0 0.930 ug/L 11/05/22 16:32 1NDVinyl acetate 1.00 0.500 ug/L 11/05/22 16:32 1NDVinyl chloride 4-Bromofluorobenzene 100 72-119 11/05/22 16:32 1 Surrogate Dil FacAnalyzedPreparedQualifierLimits%Recovery Dibromofluoromethane 92 11/05/22 16:32 175-126 Toluene-d8 (Surr)99 11/05/22 16:32 164-132 Method: 40CFR136A 625.1 - Semivolatile Organic Compounds (GC/MS) RL MDL ND 9.18 3.12 ug/L 11/01/22 13:33 11/03/22 02:26 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier 1,2,4-Trichlorobenzene 9.18 2.30 ug/L 11/01/22 13:33 11/03/22 02:26 1ND1,2-Dichlorobenzene 9.18 3.40 ug/L 11/01/22 13:33 11/03/22 02:26 1ND1,2-Diphenylhydrazine 9.18 2.66 ug/L 11/01/22 13:33 11/03/22 02:26 1ND1,3-Dichlorobenzene 9.18 3.03 ug/L 11/01/22 13:33 11/03/22 02:26 1ND1,4-Dichlorobenzene 9.18 2.02 ug/L 11/01/22 13:33 11/03/22 02:26 1ND2,4,6-Trichlorophenol 9.18 3.40 ug/L 11/01/22 13:33 11/03/22 02:26 1ND2,4-Dichlorophenol 9.18 2.76 ug/L 11/01/22 13:33 11/03/22 02:26 1ND2,4-Dimethylphenol 45.9 14.7 ug/L 11/01/22 13:33 11/03/22 02:26 1ND2,4-Dinitrophenol 9.18 2.11 ug/L 11/01/22 13:33 11/03/22 02:26 1ND2,4-Dinitrotoluene 9.18 2.57 ug/L 11/01/22 13:33 11/03/22 02:26 1ND2,6-Dinitrotoluene 9.18 4.41 ug/L 11/01/22 13:33 11/03/22 02:26 1ND2-Chloronaphthalene 9.18 2.94 ug/L 11/01/22 13:33 11/03/22 02:26 1ND2-Chlorophenol 9.18 3.58 ug/L 11/01/22 13:33 11/03/22 02:26 1ND2-Nitrophenol 55.1 9.18 ug/L 11/01/22 13:33 11/03/22 02:26 1ND3,3'-Dichlorobenzidine 45.9 4.87 ug/L 11/01/22 13:33 11/03/22 02:26 1ND4,6-Dinitro-2-methylphenol 9.18 4.32 ug/L 11/01/22 13:33 11/03/22 02:26 1ND4-Bromophenyl phenyl ether 9.18 2.30 ug/L 11/01/22 13:33 11/03/22 02:26 1ND4-Chloro-3-methylphenol 9.18 4.87 ug/L 11/01/22 13:33 11/03/22 02:26 1ND4-Chlorophenyl phenyl ether 45.9 7.44 ug/L 11/01/22 13:33 11/03/22 02:26 1ND4-Nitrophenol 9.18 4.04 ug/L 11/01/22 13:33 11/03/22 02:26 1NDAcenaphthene Eurofins Savannah Page 6 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 Client Sample Results Job ID: 680-224036-1Client: S&ME, Inc. Project/Site: GCS Bus Garage Lab Sample ID: 680-224036-1Client Sample ID: MW-1 Matrix: Ground WaterDate Collected: 10/25/22 11:00 Date Received: 10/26/22 10:30 Method: 40CFR136A 625.1 - Semivolatile Organic Compounds (GC/MS) (Continued) RL MDL ND 9.18 3.31 ug/L 11/01/22 13:33 11/03/22 02:26 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Acenaphthylene 9.18 3.31 ug/L 11/01/22 13:33 11/03/22 02:26 1NDAnthracene 73.5 23.0 ug/L 11/01/22 13:33 11/03/22 02:26 1NDBenzidine 9.18 3.86 ug/L 11/01/22 13:33 11/03/22 02:26 1NDBenzo[a]anthracene 9.18 2.57 ug/L 11/01/22 13:33 11/03/22 02:26 1NDBenzo[a]pyrene 9.18 2.85 ug/L 11/01/22 13:33 11/03/22 02:26 1NDBenzo[b]fluoranthene 9.18 2.76 ug/L 11/01/22 13:33 11/03/22 02:26 1NDBenzo[g,h,i]perylene 9.18 2.66 ug/L 11/01/22 13:33 11/03/22 02:26 1NDBenzo[k]fluoranthene 9.18 2.85 ug/L 11/01/22 13:33 11/03/22 02:26 1NDbis (2-chloroisopropyl) ether 9.18 1.65 ug/L 11/01/22 13:33 11/03/22 02:26 1NDBis(2-chloroethoxy)methane 9.18 3.31 ug/L 11/01/22 13:33 11/03/22 02:26 1NDBis(2-chloroethyl)ether 9.18 2.76 ug/L 11/01/22 13:33 11/03/22 02:26 1NDBis(2-ethylhexyl) phthalate 9.18 2.57 ug/L 11/01/22 13:33 11/03/22 02:26 1NDButyl benzyl phthalate 9.18 3.49 ug/L 11/01/22 13:33 11/03/22 02:26 1NDChrysene 9.18 2.76 ug/L 11/01/22 13:33 11/03/22 02:26 1NDDibenz(a,h)anthracene 9.18 2.02 ug/L 11/01/22 13:33 11/03/22 02:26 1NDDiethyl phthalate 9.18 1.93 ug/L 11/01/22 13:33 11/03/22 02:26 1NDDimethyl phthalate 9.18 2.11 ug/L 11/01/22 13:33 11/03/22 02:26 1NDDi-n-butyl phthalate 9.18 2.57 ug/L 11/01/22 13:33 11/03/22 02:26 1NDDi-n-octyl phthalate 9.18 1.47 ug/L 11/01/22 13:33 11/03/22 02:26 1NDFluoranthene 9.18 3.12 ug/L 11/01/22 13:33 11/03/22 02:26 1NDFluorene 9.18 1.47 ug/L 11/01/22 13:33 11/03/22 02:26 1NDHexachlorobenzene 9.18 3.67 ug/L 11/01/22 13:33 11/03/22 02:26 1NDHexachlorobutadiene 9.18 3.21 ug/L 11/01/22 13:33 11/03/22 02:26 1NDHexachlorocyclopentadiene 9.18 3.31 ug/L 11/01/22 13:33 11/03/22 02:26 1NDHexachloroethane 9.18 3.95 ug/L 11/01/22 13:33 11/03/22 02:26 1NDIndeno[1,2,3-cd]pyrene 9.18 1.84 ug/L 11/01/22 13:33 11/03/22 02:26 1NDIsophorone 9.18 3.21 ug/L 11/01/22 13:33 11/03/22 02:26 1NDNaphthalene 9.18 3.21 ug/L 11/01/22 13:33 11/03/22 02:26 1NDNitrobenzene 9.18 1.93 ug/L 11/01/22 13:33 11/03/22 02:26 1NDN-Nitrosodimethylamine 9.18 2.20 ug/L 11/01/22 13:33 11/03/22 02:26 1NDN-Nitrosodi-n-propylamine 9.18 2.66 ug/L 11/01/22 13:33 11/03/22 02:26 1NDN-Nitrosodiphenylamine 45.9 9.09 ug/L 11/01/22 13:33 11/03/22 02:26 1NDPentachlorophenol 9.18 3.95 ug/L 11/01/22 13:33 11/03/22 02:26 1NDPhenanthrene 9.18 1.38 ug/L 11/01/22 13:33 11/03/22 02:26 1NDPhenol 9.18 3.40 ug/L 11/01/22 13:33 11/03/22 02:26 1NDPyrene Tentatively Identified Compound None ug/L 11/01/22 13:33 11/03/22 02:26 1 Tentatively Identified Compound Dil FacAnalyzedPreparedUnitDQualifierEst. Result CAS No.RT 2,4,6-Tribromophenol (Surr)84 30-130 11/01/22 13:33 11/03/22 02:26 1 Surrogate Dil FacAnalyzedPreparedQualifierLimits%Recovery 2-Fluorobiphenyl (Surr)79 11/01/22 13:33 11/03/22 02:26 125-130 2-Fluorophenol (Surr)33 11/01/22 13:33 11/03/22 02:26 110-130 Nitrobenzene-d5 (Surr)73 11/01/22 13:33 11/03/22 02:26 115-314 Phenol-d5 (Surr)24 11/01/22 13:33 11/03/22 02:26 18-424 Terphenyl-d14 (Surr)88 11/01/22 13:33 11/03/22 02:26 135-131 Eurofins Savannah Page 7 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 Client Sample Results Job ID: 680-224036-1Client: S&ME, Inc. Project/Site: GCS Bus Garage Lab Sample ID: 680-224036-1Client Sample ID: MW-1 Matrix: Ground WaterDate Collected: 10/25/22 11:00 Date Received: 10/26/22 10:30 Method: MA DEP MAVPH - Massachusetts - Volatile Petroleum Hydrocarbons (GC) RL MDL ND 26.0 26.0 ug/L 11/08/22 22:20 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier C5-C8 Aliphatics 7.00 7.00 ug/L 11/08/22 22:20 1NDC9-C10 Aromatics 11.0 11.0 ug/L 11/08/22 22:20 1NDC9-C12 Aliphatics a,a,a-Trifluorotoluene (fid)86 70-130 11/08/22 22:20 1 Surrogate Dil FacAnalyzedPreparedQualifierLimits%Recovery a,a,a-Trifluorotoluene (pid)88 11/08/22 22:20 170-130 Method: MA DEP MA-EPH - Massachusetts - Extractable Petroleum Hydrocarbons (GC) RL MDL ND 302 302 ug/L 11/01/22 07:14 11/02/22 13:45 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier C11-C22 Aromatics 147 147 ug/L 11/01/22 07:14 11/02/22 11:32 1NDC19-C36 Aliphatics 147 147 ug/L 11/01/22 07:14 11/02/22 11:32 1NDC9-C18 Aliphatics 1-Chlorooctadecane 81 40-140 11/01/22 07:14 11/02/22 11:32 1 Surrogate Dil FacAnalyzedPreparedQualifierLimits%Recovery 2-Bromonaphthalene 47 11/01/22 07:14 11/02/22 13:45 140-140 2-Fluorobiphenyl 61 11/01/22 07:14 11/02/22 13:45 140-140 o-Terphenyl 67 11/01/22 07:14 11/02/22 13:45 140-140 Method: SW846 6010D - Metals (ICP) - Total Recoverable RL MDL ND 10.0 1.10 ug/L 10/27/22 13:57 10/28/22 17:49 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Chromium, Total 10.0 6.60 ug/L 10/27/22 13:57 10/28/22 17:49 1NDLead, Total Eurofins Savannah Page 8 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 QC Sample Results Job ID: 680-224036-1Client: S&ME, Inc. Project/Site: GCS Bus Garage Method: SM6200-B - Volatile Organic Compounds Client Sample ID: Method BlankLab Sample ID: MB 400-599363/4 Matrix: Water Prep Type: Total/NA Analysis Batch: 599363 RL MDL Acetone ND 25.0 10.0 ug/L 11/05/22 08:16 1 MB MB Analyte Dil FacAnalyzedPreparedDUnitResultQualifier ND 0.1301.00 ug/L 11/05/22 08:16 1Benzene ND 0.5401.00 ug/L 11/05/22 08:16 1Bromobenzene ND 0.2505.00 ug/L 11/05/22 08:16 1Bromoform ND 0.9801.00 ug/L 11/05/22 08:16 1Bromomethane ND 2.6025.0 ug/L 11/05/22 08:16 12-Butanone (MEK) ND 0.1901.00 ug/L 11/05/22 08:16 1Carbon tetrachloride ND 0.1501.00 ug/L 11/05/22 08:16 1Chlorobenzene ND 0.2101.00 ug/L 11/05/22 08:16 1Chlorobromomethane ND 0.2401.00 ug/L 11/05/22 08:16 1Chlorodibromomethane ND 0.7601.00 ug/L 11/05/22 08:16 1Chloroethane ND 1.001.00 ug/L 11/05/22 08:16 1Chloroform ND 0.3201.00 ug/L 11/05/22 08:16 1Chloromethane ND 0.5701.00 ug/L 11/05/22 08:16 12-Chlorotoluene ND 0.5601.00 ug/L 11/05/22 08:16 14-Chlorotoluene ND 0.2001.00 ug/L 11/05/22 08:16 1cis-1,2-Dichloroethene ND 0.5005.00 ug/L 11/05/22 08:16 1cis-1,3-Dichloropropene ND 0.2205.00 ug/L 11/05/22 08:16 1Dibromomethane ND 0.5001.00 ug/L 11/05/22 08:16 11,2-Dichlorobenzene ND 0.5401.00 ug/L 11/05/22 08:16 11,3-Dichlorobenzene ND 0.6401.00 ug/L 11/05/22 08:16 11,4-Dichlorobenzene ND 0.5001.00 ug/L 11/05/22 08:16 1Dichlorobromomethane ND 0.8501.00 ug/L 11/05/22 08:16 1Dichlorodifluoromethane ND 0.5001.00 ug/L 11/05/22 08:16 11,1-Dichloroethane ND 0.1901.00 ug/L 11/05/22 08:16 11,2-Dichloroethane ND 0.5001.00 ug/L 11/05/22 08:16 11,1-Dichloroethene ND 0.5001.00 ug/L 11/05/22 08:16 11,2-Dichloropropane ND 0.5001.00 ug/L 11/05/22 08:16 11,3-Dichloropropane ND 0.5001.00 ug/L 11/05/22 08:16 12,2-Dichloropropane ND 0.5001.00 ug/L 11/05/22 08:16 11,1-Dichloropropene ND 12.020.0 ug/L 11/05/22 08:16 13,3-Dimethyl-1-butanol ND 24.0100 ug/L 11/05/22 08:16 1Ethanol ND 0.5001.00 ug/L 11/05/22 08:16 1Ethylbenzene ND 0.2301.00 ug/L 11/05/22 08:16 1Ethylene Dibromide ND 1.4025.0 ug/L 11/05/22 08:16 12-Hexanone ND 0.5301.00 ug/L 11/05/22 08:16 1Isopropylbenzene ND 0.2001.00 ug/L 11/05/22 08:16 1Isopropyl ether ND 0.7101.00 ug/L 11/05/22 08:16 14-Isopropyltoluene ND 3.005.00 ug/L 11/05/22 08:16 1Methylene Chloride ND 1.8025.0 ug/L 11/05/22 08:16 14-Methyl-2-pentanone (MIBK) ND 0.2201.00 ug/L 11/05/22 08:16 1Methyl tert-butyl ether ND 0.6305.00 ug/L 11/05/22 08:16 1m-Xylene & p-Xylene ND 3.005.00 ug/L 11/05/22 08:16 1Naphthalene ND 0.7601.00 ug/L 11/05/22 08:16 1n-Butylbenzene ND 0.6901.00 ug/L 11/05/22 08:16 1N-Propylbenzene ND 0.6005.00 ug/L 11/05/22 08:16 1o-Xylene ND 0.7001.00 ug/L 11/05/22 08:16 1sec-Butylbenzene ND 1.001.00 ug/L 11/05/22 08:16 1Styrene Eurofins Savannah Page 9 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 QC Sample Results Job ID: 680-224036-1Client: S&ME, Inc. Project/Site: GCS Bus Garage Method: SM6200-B - Volatile Organic Compounds (Continued) Client Sample ID: Method BlankLab Sample ID: MB 400-599363/4 Matrix: Water Prep Type: Total/NA Analysis Batch: 599363 RL MDL t-Amyl alcohol ND 10.0 4.50 ug/L 11/05/22 08:16 1 MB MB Analyte Dil FacAnalyzedPreparedDUnitResultQualifier ND 0.2301.00 ug/L 11/05/22 08:16 1Tert-amyl methyl ether ND 0.6301.00 ug/L 11/05/22 08:16 1tert-Butylbenzene ND 0.2801.00 ug/L 11/05/22 08:16 1Tert-butyl ethyl ether ND 2.4010.0 ug/L 11/05/22 08:16 1tert-Butyl Formate ND 0.1601.00 ug/L 11/05/22 08:16 11,1,1,2-Tetrachloroethane ND 0.5001.00 ug/L 11/05/22 08:16 11,1,2,2-Tetrachloroethane ND 0.9001.00 ug/L 11/05/22 08:16 1Tetrachloroethene ND 0.4101.00 ug/L 11/05/22 08:16 1Toluene ND 0.5001.00 ug/L 11/05/22 08:16 1trans-1,2-Dichloroethene ND 0.2005.00 ug/L 11/05/22 08:16 1trans-1,3-Dichloropropene ND 0.9001.00 ug/L 11/05/22 08:16 11,2,3-Trichlorobenzene ND 0.8201.00 ug/L 11/05/22 08:16 11,2,4-Trichlorobenzene ND 0.1801.00 ug/L 11/05/22 08:16 11,1,1-Trichloroethane ND 0.2105.00 ug/L 11/05/22 08:16 11,1,2-Trichloroethane ND 0.1501.00 ug/L 11/05/22 08:16 1Trichloroethene ND 0.5201.00 ug/L 11/05/22 08:16 1Trichlorofluoromethane ND 0.8405.00 ug/L 11/05/22 08:16 11,2,3-Trichloropropane ND 0.8201.00 ug/L 11/05/22 08:16 11,2,4-Trimethylbenzene ND 0.5601.00 ug/L 11/05/22 08:16 11,3,5-Trimethylbenzene ND 0.93025.0 ug/L 11/05/22 08:16 1Vinyl acetate ND 0.5001.00 ug/L 11/05/22 08:16 1Vinyl chloride 4-Bromofluorobenzene 101 72-119 11/05/22 08:16 1 MB MB Surrogate Dil FacPreparedAnalyzedQualifierLimits%Recovery 91 11/05/22 08:16 1Dibromofluoromethane75-126 99 11/05/22 08:16 1Toluene-d8 (Surr)64-132 Client Sample ID: Lab Control SampleLab Sample ID: LCS 400-599363/1002 Matrix: Water Prep Type: Total/NA Analysis Batch: 599363 Acetone 200 241.6 ug/L 121 43-160 Analyte LCS LCS DUnitResultQualifier %Rec Spike Added %Rec Limits Benzene 50.0 44.90 ug/L 90 70-130 Bromobenzene 50.0 49.79 ug/L 100 70-132 Bromoform 50.0 46.95 ug/L 94 57-140 Bromomethane 50.0 46.07 ug/L 92 10-160 2-Butanone (MEK)200 205.7 ug/L 103 61-145 Carbon tetrachloride 50.0 46.18 ug/L 92 61-137 Chlorobenzene 50.0 49.92 ug/L 100 70-130 Chlorobromomethane 50.0 45.71 ug/L 91 70-130 Chlorodibromomethane 50.0 46.46 ug/L 93 67-135 Chloroethane 50.0 43.06 ug/L 86 55-141 Chloroform 50.0 43.68 ug/L 87 69-130 Chloromethane 50.0 59.92 ug/L 120 58-137 2-Chlorotoluene 50.0 50.43 ug/L 101 70-130 4-Chlorotoluene 50.0 51.36 ug/L 103 70-130 Eurofins Savannah Page 10 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 QC Sample Results Job ID: 680-224036-1Client: S&ME, Inc. Project/Site: GCS Bus Garage Method: SM6200-B - Volatile Organic Compounds (Continued) Client Sample ID: Lab Control SampleLab Sample ID: LCS 400-599363/1002 Matrix: Water Prep Type: Total/NA Analysis Batch: 599363 cis-1,2-Dichloroethene 50.0 49.30 ug/L 99 68-130 Analyte LCS LCS DUnitResultQualifier %Rec Spike Added %Rec Limits cis-1,3-Dichloropropene 50.0 45.72 ug/L 91 69-132 Dibromomethane 50.0 42.76 ug/L 86 70-130 1,2-Dichlorobenzene 50.0 48.82 ug/L 98 67-130 1,3-Dichlorobenzene 50.0 51.43 ug/L 103 70-130 1,4-Dichlorobenzene 50.0 49.66 ug/L 99 70-130 Dichlorobromomethane 50.0 43.34 ug/L 87 67-133 Dichlorodifluoromethane 50.0 41.70 ug/L 83 41-146 1,1-Dichloroethane 50.0 50.66 ug/L 101 70-130 1,2-Dichloroethane 50.0 43.04 ug/L 86 69-130 1,1-Dichloroethene 50.0 45.37 ug/L 91 63-134 1,2-Dichloropropane 50.0 48.95 ug/L 98 70-130 1,3-Dichloropropane 50.0 47.47 ug/L 95 70-130 2,2-Dichloropropane 50.0 51.34 ug/L 103 52-135 1,1-Dichloropropene 50.0 45.25 ug/L 90 70-130 3,3-Dimethyl-1-butanol 250 265.0 ug/L 106 38-144 Ethanol 2000 2004 ug/L 100 20-160 Ethylbenzene 50.0 51.53 ug/L 103 70-130 Ethylene Dibromide 50.0 46.45 ug/L 93 70-130 2-Hexanone 200 214.0 ug/L 107 65-137 Isopropylbenzene 50.0 51.91 ug/L 104 70-130 Isopropyl ether 50.0 48.89 ug/L 98 64-132 4-Isopropyltoluene 50.0 54.72 ug/L 109 65-130 Methylene Chloride 50.0 44.65 ug/L 89 66-135 4-Methyl-2-pentanone (MIBK)200 202.0 ug/L 101 69-138 Methyl tert-butyl ether 50.0 43.12 ug/L 86 66-130 m-Xylene & p-Xylene 50.0 50.76 ug/L 102 70-130 Naphthalene 50.0 59.57 ug/L 119 47-149 n-Butylbenzene 50.0 54.96 ug/L 110 67-130 N-Propylbenzene 50.0 54.20 ug/L 108 70-130 o-Xylene 50.0 50.33 ug/L 101 70-130 sec-Butylbenzene 50.0 53.83 ug/L 108 66-130 Styrene 50.0 48.54 ug/L 97 70-130 t-Amyl alcohol 500 504.5 ug/L 101 38-139 Tert-amyl methyl ether 50.0 43.98 ug/L 88 52-132 tert-Butylbenzene 50.0 50.83 ug/L 102 64-139 Tert-butyl ethyl ether 50.0 45.64 ug/L 91 55-133 tert-Butyl Formate 250 232.0 ug/L 93 10-160 1,1,1,2-Tetrachloroethane 50.0 48.34 ug/L 97 67-131 1,1,2,2-Tetrachloroethane 50.0 47.96 ug/L 96 70-131 Tetrachloroethene 50.0 50.04 ug/L 100 65-130 Toluene 50.0 49.45 ug/L 99 70-130 trans-1,2-Dichloroethene 50.0 45.44 ug/L 91 70-130 trans-1,3-Dichloropropene 50.0 46.17 ug/L 92 63-130 1,2,3-Trichlorobenzene 50.0 54.39 ug/L 109 60-138 1,2,4-Trichlorobenzene 50.0 54.69 ug/L 109 60-140 1,1,1-Trichloroethane 50.0 44.73 ug/L 89 68-130 1,1,2-Trichloroethane 50.0 46.59 ug/L 93 70-130 Trichloroethene 50.0 47.44 ug/L 95 70-130 Eurofins Savannah Page 11 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 QC Sample Results Job ID: 680-224036-1Client: S&ME, Inc. Project/Site: GCS Bus Garage Method: SM6200-B - Volatile Organic Compounds (Continued) Client Sample ID: Lab Control SampleLab Sample ID: LCS 400-599363/1002 Matrix: Water Prep Type: Total/NA Analysis Batch: 599363 Trichlorofluoromethane 50.0 55.65 ug/L 111 65-138 Analyte LCS LCS DUnitResultQualifier %Rec Spike Added %Rec Limits 1,2,3-Trichloropropane 50.0 48.30 ug/L 97 70-130 1,2,4-Trimethylbenzene 50.0 53.48 ug/L 107 70-130 1,3,5-Trimethylbenzene 50.0 53.11 ug/L 106 69-130 Vinyl acetate 100 98.81 ug/L 99 26-160 Vinyl chloride 50.0 49.60 ug/L 99 59-136 4-Bromofluorobenzene 72 -119 Surrogate 98 LCS LCS Qualifier Limits%Recovery 90Dibromofluoromethane 75 -126 102Toluene-d8 (Surr)64 -132 Method: 625.1 - Semivolatile Organic Compounds (GC/MS) Client Sample ID: Method BlankLab Sample ID: MB 680-748153/1-A Matrix: Water Prep Type: Total/NA Analysis Batch: 748486 Prep Batch: 748153 RL MDL 1,2,4-Trichlorobenzene ND 10.0 3.40 ug/L 11/01/22 13:33 11/02/22 19:16 1 MB MB Analyte Dil FacAnalyzedPreparedDUnitResultQualifier ND 2.5010.0 ug/L 11/01/22 13:33 11/02/22 19:16 11,2-Dichlorobenzene ND 3.7010.0 ug/L 11/01/22 13:33 11/02/22 19:16 11,2-Diphenylhydrazine ND 2.9010.0 ug/L 11/01/22 13:33 11/02/22 19:16 11,3-Dichlorobenzene ND 3.3010.0 ug/L 11/01/22 13:33 11/02/22 19:16 11,4-Dichlorobenzene ND 2.2010.0 ug/L 11/01/22 13:33 11/02/22 19:16 12,4,6-Trichlorophenol ND 3.7010.0 ug/L 11/01/22 13:33 11/02/22 19:16 12,4-Dichlorophenol ND 3.0010.0 ug/L 11/01/22 13:33 11/02/22 19:16 12,4-Dimethylphenol ND 16.050.0 ug/L 11/01/22 13:33 11/02/22 19:16 12,4-Dinitrophenol ND 2.3010.0 ug/L 11/01/22 13:33 11/02/22 19:16 12,4-Dinitrotoluene ND 2.8010.0 ug/L 11/01/22 13:33 11/02/22 19:16 12,6-Dinitrotoluene ND 4.8010.0 ug/L 11/01/22 13:33 11/02/22 19:16 12-Chloronaphthalene ND 3.2010.0 ug/L 11/01/22 13:33 11/02/22 19:16 12-Chlorophenol ND 3.9010.0 ug/L 11/01/22 13:33 11/02/22 19:16 12-Nitrophenol ND 10.060.0 ug/L 11/01/22 13:33 11/02/22 19:16 13,3'-Dichlorobenzidine ND 5.3050.0 ug/L 11/01/22 13:33 11/02/22 19:16 14,6-Dinitro-2-methylphenol ND 4.7010.0 ug/L 11/01/22 13:33 11/02/22 19:16 14-Bromophenyl phenyl ether ND 2.5010.0 ug/L 11/01/22 13:33 11/02/22 19:16 14-Chloro-3-methylphenol ND 5.3010.0 ug/L 11/01/22 13:33 11/02/22 19:16 14-Chlorophenyl phenyl ether ND 8.1050.0 ug/L 11/01/22 13:33 11/02/22 19:16 14-Nitrophenol ND 4.4010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Acenaphthene ND 3.6010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Acenaphthylene ND 3.6010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Anthracene ND 25.080.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Benzidine ND 4.2010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Benzo[a]anthracene ND 2.8010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Benzo[a]pyrene ND 3.1010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Benzo[b]fluoranthene ND 3.0010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Benzo[g,h,i]perylene ND 2.9010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Benzo[k]fluoranthene ND 3.1010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1bis (2-chloroisopropyl) ether Eurofins Savannah Page 12 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 QC Sample Results Job ID: 680-224036-1Client: S&ME, Inc. Project/Site: GCS Bus Garage Method: 625.1 - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: Method BlankLab Sample ID: MB 680-748153/1-A Matrix: Water Prep Type: Total/NA Analysis Batch: 748486 Prep Batch: 748153 RL MDL Bis(2-chloroethoxy)methane ND 10.0 1.80 ug/L 11/01/22 13:33 11/02/22 19:16 1 MB MB Analyte Dil FacAnalyzedPreparedDUnitResultQualifier ND 3.6010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Bis(2-chloroethyl)ether ND 3.0010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Bis(2-ethylhexyl) phthalate ND 2.8010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Butyl benzyl phthalate ND 3.8010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Chrysene ND 3.0010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Dibenz(a,h)anthracene ND 2.2010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Diethyl phthalate ND 2.1010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Dimethyl phthalate ND 2.3010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Di-n-butyl phthalate ND 2.8010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Di-n-octyl phthalate ND 1.6010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Fluoranthene ND 3.4010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Fluorene ND 1.6010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Hexachlorobenzene ND 4.0010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Hexachlorobutadiene ND 3.5010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Hexachlorocyclopentadiene ND 3.6010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Hexachloroethane ND 4.3010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Indeno[1,2,3-cd]pyrene ND 2.0010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Isophorone ND 3.5010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Naphthalene ND 3.5010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Nitrobenzene ND 2.1010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1N-Nitrosodimethylamine ND 2.4010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1N-Nitrosodi-n-propylamine ND 2.9010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1N-Nitrosodiphenylamine ND 9.9050.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Pentachlorophenol ND 4.3010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Phenanthrene ND 1.5010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Phenol ND 3.7010.0 ug/L 11/01/22 13:33 11/02/22 19:16 1Pyrene 4,4'-DDD NC ug/L 72-54-8 11/01/22 13:33 11/02/22 19:16 1 MB MB Tentatively Identified Compound Dil FacPreparedAnalyzedDUnitQualifierEst. Result RT CAS No. 11/01/22 13:33 11/02/22 19:16 1NCug/L 72-55-94,4'-DDE 11/01/22 13:33 11/02/22 19:16 1NCug/L 50-29-34,4'-DDT 11/01/22 13:33 11/02/22 19:16 1NCug/L 92-87-5Benzidine_T 11/01/22 13:33 11/02/22 19:16 1NCug/L 87-86-5Pentachlorophenol_T 11/01/22 13:33 11/02/22 19:16 1Noneug/LTentatively Identified Compound 2,4,6-Tribromophenol (Surr)79 30-130 11/02/22 19:16 1 MB MB Surrogate 11/01/22 13:33 Dil FacPreparedAnalyzedQualifierLimits%Recovery 73 11/01/22 13:33 11/02/22 19:16 12-Fluorobiphenyl (Surr)25-130 33 11/01/22 13:33 11/02/22 19:16 12-Fluorophenol (Surr)10-130 71 11/01/22 13:33 11/02/22 19:16 1Nitrobenzene-d5 (Surr)15-314 24 11/01/22 13:33 11/02/22 19:16 1Phenol-d5 (Surr)8-424 92 11/01/22 13:33 11/02/22 19:16 1Terphenyl-d14 (Surr)35-131 Eurofins Savannah Page 13 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 QC Sample Results Job ID: 680-224036-1Client: S&ME, Inc. Project/Site: GCS Bus Garage Method: 625.1 - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: Lab Control SampleLab Sample ID: LCS 680-748153/2-A Matrix: Water Prep Type: Total/NA Analysis Batch: 748486 Prep Batch: 748153 1,2,4-Trichlorobenzene 200 134.7 ug/L 67 44-142 Analyte LCS LCS DUnitResultQualifier %Rec Spike Added %Rec Limits 1,2-Dichlorobenzene 200 121.3 ug/L 61 13-130 1,2-Diphenylhydrazine 200 158.8 ug/L 79 38-130 1,3-Dichlorobenzene 200 121.5 ug/L 61 12-130 1,4-Dichlorobenzene 200 119.8 ug/L 60 13-130 2,4,6-Trichlorophenol 200 151.4 ug/L 76 37-144 2,4-Dichlorophenol 200 135.0 ug/L 68 39-135 2,4-Dimethylphenol 200 128.6 ug/L 64 32-120 2,4-Dinitrophenol 400 377.6 ug/L 94 1-191 2,4-Dinitrotoluene 200 161.7 ug/L 81 39-139 2,6-Dinitrotoluene 200 154.8 ug/L 77 50-158 2-Chloronaphthalene 200 143.8 ug/L 72 60-120 2-Chlorophenol 200 112.2 ug/L 56 23-134 2-Nitrophenol 200 138.1 ug/L 69 29-182 3,3'-Dichlorobenzidine 200 212.7 ug/L 106 1-262 4,6-Dinitro-2-methylphenol 400 404.8 ug/L 101 1-181 4-Bromophenyl phenyl ether 200 160.5 ug/L 80 53-127 4-Chloro-3-methylphenol 200 138.8 ug/L 69 22-147 4-Chlorophenyl phenyl ether 200 152.1 ug/L 76 25-158 4-Nitrophenol 400 120.3 ug/L 30 1-132 Acenaphthene 200 132.6 ug/L 66 47-145 Acenaphthylene 200 153.0 ug/L 76 33-145 Anthracene 200 158.4 ug/L 79 27-133 Benzidine 200 76.92 J ug/L 38 1-122 Benzo[a]anthracene 200 168.4 ug/L 84 33-143 Benzo[a]pyrene 200 169.5 ug/L 85 17-163 Benzo[b]fluoranthene 200 173.3 ug/L 87 24-159 Benzo[g,h,i]perylene 200 166.4 ug/L 83 1-219 Benzo[k]fluoranthene 200 167.3 ug/L 84 11-162 bis (2-chloroisopropyl) ether 200 129.5 ug/L 65 30-104 Bis(2-chloroethoxy)methane 200 140.2 ug/L 70 33-184 Bis(2-chloroethyl)ether 200 129.6 ug/L 65 12-158 Bis(2-ethylhexyl) phthalate 200 178.1 ug/L 89 8-158 Butyl benzyl phthalate 200 175.7 ug/L 88 1-152 Chrysene 200 166.4 ug/L 83 17-168 Dibenz(a,h)anthracene 200 168.6 ug/L 84 1-227 Diethyl phthalate 200 160.6 ug/L 80 1-120 Dimethyl phthalate 200 155.7 ug/L 78 1-120 Di-n-butyl phthalate 200 168.1 ug/L 84 1-120 Di-n-octyl phthalate 200 171.7 ug/L 86 4-146 Fluoranthene 200 158.2 ug/L 79 26-137 Fluorene 200 149.4 ug/L 75 59-121 Hexachlorobenzene 200 163.4 ug/L 82 1-152 Hexachlorobutadiene 200 127.4 ug/L 64 24-120 Hexachlorocyclopentadiene 200 142.4 ug/L 71 15-130 Hexachloroethane 200 123.8 ug/L 62 40-120 Indeno[1,2,3-cd]pyrene 200 175.1 ug/L 88 1-171 Isophorone 200 149.2 ug/L 75 21-196 Eurofins Savannah Page 14 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 QC Sample Results Job ID: 680-224036-1Client: S&ME, Inc. Project/Site: GCS Bus Garage Method: 625.1 - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: Lab Control SampleLab Sample ID: LCS 680-748153/2-A Matrix: Water Prep Type: Total/NA Analysis Batch: 748486 Prep Batch: 748153 Naphthalene 200 133.3 ug/L 67 21-133 Analyte LCS LCS DUnitResultQualifier %Rec Spike Added %Rec Limits Nitrobenzene 200 133.8 ug/L 67 35-180 N-Nitrosodimethylamine 200 89.15 ug/L 45 15-130 N-Nitrosodi-n-propylamine 200 144.2 ug/L 72 1-230 N-Nitrosodiphenylamine 200 157.8 ug/L 79 35-130 Pentachlorophenol 400 393.4 ug/L 98 14-176 Phenanthrene 200 157.7 ug/L 79 54-120 Phenol 200 44.43 ug/L 22 5-120 Pyrene 200 169.0 ug/L 85 52-120 2,4,6-Tribromophenol (Surr)30 -130 Surrogate 76 LCS LCS Qualifier Limits%Recovery 692-Fluorobiphenyl (Surr)25 -130 302-Fluorophenol (Surr)10 -130 66Nitrobenzene-d5 (Surr)15 -314 23Phenol-d5 (Surr)8 -424 83Terphenyl-d14 (Surr)35 -131 Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 680-748153/3-A Matrix: Water Prep Type: Total/NA Analysis Batch: 748486 Prep Batch: 748153 1,2,4-Trichlorobenzene 200 144.2 ug/L 72 44-142 7 50 Analyte LCSD LCSD DUnitResultQualifier %Rec Spike Added %Rec Limits LimitRPD RPD 1,2-Dichlorobenzene 200 128.0 ug/L 64 13-130 5 46 1,2-Diphenylhydrazine 200 175.4 ug/L 88 38-130 10 41 1,3-Dichlorobenzene 200 124.5 ug/L 62 12-130 2 49 1,4-Dichlorobenzene 200 125.1 ug/L 63 13-130 4 46 2,4,6-Trichlorophenol 200 169.6 ug/L 85 37-144 11 58 2,4-Dichlorophenol 200 141.1 ug/L 71 39-135 4 50 2,4-Dimethylphenol 200 135.7 ug/L 68 32-120 5 58 2,4-Dinitrophenol 400 432.4 ug/L 108 1-191 14 132 2,4-Dinitrotoluene 200 183.7 ug/L 92 39-139 13 42 2,6-Dinitrotoluene 200 172.2 ug/L 86 50-158 11 53 2-Chloronaphthalene 200 157.5 ug/L 79 60-120 9 24 2-Chlorophenol 200 119.3 ug/L 60 23-134 6 61 2-Nitrophenol 200 144.0 ug/L 72 29-182 4 55 3,3'-Dichlorobenzidine 200 284.6 ug/L 142 1-262 29 108 4,6-Dinitro-2-methylphenol 400 447.2 ug/L 112 1-181 10 203 4-Bromophenyl phenyl ether 200 178.1 ug/L 89 53-127 10 43 4-Chloro-3-methylphenol 200 149.9 ug/L 75 22-147 8 73 4-Chlorophenyl phenyl ether 200 171.0 ug/L 86 25-158 12 61 4-Nitrophenol 400 132.8 ug/L 33 1-132 10 131 Acenaphthene 200 147.8 ug/L 74 47-145 11 48 Acenaphthylene 200 170.0 ug/L 85 33-145 11 74 Anthracene 200 176.3 ug/L 88 27-133 11 66 Benzidine 200 220.1 ug/L 110 1-122 96 131 Benzo[a]anthracene 200 186.6 ug/L 93 33-143 10 53 Eurofins Savannah Page 15 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 QC Sample Results Job ID: 680-224036-1Client: S&ME, Inc. Project/Site: GCS Bus Garage Method: 625.1 - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 680-748153/3-A Matrix: Water Prep Type: Total/NA Analysis Batch: 748486 Prep Batch: 748153 Benzo[a]pyrene 200 187.5 ug/L 94 17-163 10 72 Analyte LCSD LCSD DUnitResultQualifier %Rec Spike Added %Rec Limits LimitRPD RPD Benzo[b]fluoranthene 200 182.9 ug/L 91 24-159 5 71 Benzo[g,h,i]perylene 200 182.7 ug/L 91 1-219 9 97 Benzo[k]fluoranthene 200 182.5 ug/L 91 11-162 9 63 bis (2-chloroisopropyl) ether 200 133.6 ug/L 67 30-104 3 42 Bis(2-chloroethoxy)methane 200 146.4 ug/L 73 33-184 4 54 Bis(2-chloroethyl)ether 200 135.7 ug/L 68 12-158 5 108 Bis(2-ethylhexyl) phthalate 200 193.6 ug/L 97 8-158 8 82 Butyl benzyl phthalate 200 189.6 ug/L 95 1-152 8 60 Chrysene 200 183.7 ug/L 92 17-168 10 87 Dibenz(a,h)anthracene 200 185.2 ug/L 93 1-227 9 126 Diethyl phthalate 200 183.0 ug/L 91 1-120 13 100 Dimethyl phthalate 200 177.6 ug/L 89 1-120 13 183 Di-n-butyl phthalate 200 186.1 ug/L 93 1-120 10 47 Di-n-octyl phthalate 200 189.6 ug/L 95 4-146 10 69 Fluoranthene 200 174.5 ug/L 87 26-137 10 66 Fluorene 200 170.9 ug/L 85 59-121 13 38 Hexachlorobenzene 200 179.4 ug/L 90 1-152 9 55 Hexachlorobutadiene 200 138.1 ug/L 69 24-120 8 62 Hexachlorocyclopentadiene 200 153.4 ug/L 77 15-130 7 47 Hexachloroethane 200 125.0 ug/L 63 40-120 1 52 Indeno[1,2,3-cd]pyrene 200 193.3 ug/L 97 1-171 10 99 Isophorone 200 159.9 ug/L 80 21-196 7 93 Naphthalene 200 139.9 ug/L 70 21-133 5 65 Nitrobenzene 200 142.2 ug/L 71 35-180 6 62 N-Nitrosodimethylamine 200 87.48 ug/L 44 15-130 2 50 N-Nitrosodi-n-propylamine 200 151.3 ug/L 76 1-230 5 87 N-Nitrosodiphenylamine 200 172.9 ug/L 86 35-130 9 39 Pentachlorophenol 400 438.4 ug/L 110 14-176 11 86 Phenanthrene 200 174.6 ug/L 87 54-120 10 39 Phenol 200 50.45 ug/L 25 5-120 13 64 Pyrene 200 182.4 ug/L 91 52-120 8 49 2,4,6-Tribromophenol (Surr)30 -130 Surrogate 85 LCSD LCSD Qualifier Limits%Recovery 752-Fluorobiphenyl (Surr)25 -130 322-Fluorophenol (Surr)10 -130 71Nitrobenzene-d5 (Surr)15 -314 24Phenol-d5 (Surr)8 -424 89Terphenyl-d14 (Surr)35 -131 Method: MAVPH - Massachusetts - Volatile Petroleum Hydrocarbons (GC) Client Sample ID: Method BlankLab Sample ID: MB 400-599740/5 Matrix: Water Prep Type: Total/NA Analysis Batch: 599740 RL MDL C5-C8 Aliphatics ND 26.0 26.0 ug/L 11/08/22 16:58 1 MB MB Analyte Dil FacAnalyzedPreparedDUnitResultQualifier Eurofins Savannah Page 16 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 QC Sample Results Job ID: 680-224036-1Client: S&ME, Inc. Project/Site: GCS Bus Garage Method: MAVPH - Massachusetts - Volatile Petroleum Hydrocarbons (GC) (Continued) Client Sample ID: Method BlankLab Sample ID: MB 400-599740/5 Matrix: Water Prep Type: Total/NA Analysis Batch: 599740 RL MDL C9-C10 Aromatics ND 7.00 7.00 ug/L 11/08/22 16:58 1 MB MB Analyte Dil FacAnalyzedPreparedDUnitResultQualifier ND 11.011.0 ug/L 11/08/22 16:58 1C9-C12 Aliphatics a,a,a-Trifluorotoluene (fid)87 70-130 11/08/22 16:58 1 MB MB Surrogate Dil FacPreparedAnalyzedQualifierLimits%Recovery 89 11/08/22 16:58 1a,a,a-Trifluorotoluene (pid)70-130 Client Sample ID: Lab Control SampleLab Sample ID: LCS 400-599740/3 Matrix: Water Prep Type: Total/NA Analysis Batch: 599740 C5-C8 Aliphatics 300 229.9 ug/L 77 70-130 Analyte LCS LCS DUnitResultQualifier %Rec Spike Added %Rec Limits C9-C10 Aromatics 50.0 38.62 ug/L 77 70-130 C9-C12 Aliphatics 350 271.9 ug/L 78 70-130 a,a,a-Trifluorotoluene (fid)70 -130 Surrogate 89 LCS LCS Qualifier Limits%Recovery 87a,a,a-Trifluorotoluene (pid)70 -130 Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 400-599740/4 Matrix: Water Prep Type: Total/NA Analysis Batch: 599740 C5-C8 Aliphatics 300 226.6 ug/L 76 70-130 1 25 Analyte LCSD LCSD DUnitResultQualifier %Rec Spike Added %Rec Limits LimitRPD RPD C9-C10 Aromatics 50.0 39.26 ug/L 79 70-130 2 25 C9-C12 Aliphatics 350 267.1 ug/L 76 70-130 2 25 a,a,a-Trifluorotoluene (fid)70 -130 Surrogate 87 LCSD LCSD Qualifier Limits%Recovery 87a,a,a-Trifluorotoluene (pid)70 -130 Method: MA-EPH - Massachusetts - Extractable Petroleum Hydrocarbons (GC) Client Sample ID: Method BlankLab Sample ID: MB 400-598655/1-A Matrix: Water Prep Type: Total/NA Analysis Batch: 598830 Prep Batch: 598655 RL MDL C19-C36 Aliphatics ND 150 150 ug/L 11/01/22 07:14 11/02/22 10:27 1 MB MB Analyte Dil FacAnalyzedPreparedDUnitResultQualifier ND 150150 ug/L 11/01/22 07:14 11/02/22 10:27 1C9-C18 Aliphatics 1-Chlorooctadecane 75 40-140 11/02/22 10:27 1 MB MB Surrogate 11/01/22 07:14 Dil FacPreparedAnalyzedQualifierLimits%Recovery Eurofins Savannah Page 17 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 QC Sample Results Job ID: 680-224036-1Client: S&ME, Inc. Project/Site: GCS Bus Garage Method: MA-EPH - Massachusetts - Extractable Petroleum Hydrocarbons (GC) (Continued) Client Sample ID: Method BlankLab Sample ID: MB 400-598655/1-A Matrix: Water Prep Type: Total/NA Analysis Batch: 598833 Prep Batch: 598655 RL MDL C11-C22 Aromatics ND 309 309 ug/L 11/01/22 07:14 11/02/22 12:38 1 MB MB Analyte Dil FacAnalyzedPreparedDUnitResultQualifier 2-Bromonaphthalene 60 40-140 11/02/22 12:38 1 MB MB Surrogate 11/01/22 07:14 Dil FacPreparedAnalyzedQualifierLimits%Recovery 61 11/01/22 07:14 11/02/22 12:38 12-Fluorobiphenyl 40-140 66 11/01/22 07:14 11/02/22 12:38 1o-Terphenyl 40-140 Client Sample ID: Lab Control SampleLab Sample ID: LCS 400-598655/2-A Matrix: Water Prep Type: Total/NA Analysis Batch: 598830 Prep Batch: 598655 C19-C36 Aliphatics 1820 1607 ug/L 88 40-140 Analyte LCS LCS DUnitResultQualifier %Rec Spike Added %Rec Limits C9-C18 Aliphatics 1360 1188 ug/L 87 40-140 1-Chlorooctadecane 40 -140 Surrogate 87 LCS LCS Qualifier Limits%Recovery Client Sample ID: Lab Control SampleLab Sample ID: LCS 400-598655/2-A Matrix: Water Prep Type: Total/NA Analysis Batch: 598833 Prep Batch: 598655 C11-C22 Aromatics 3860 3431 ug/L 89 40-140 Analyte LCS LCS DUnitResultQualifier %Rec Spike Added %Rec Limits 2-Bromonaphthalene 40 -140 Surrogate 50 LCS LCS Qualifier Limits%Recovery 622-Fluorobiphenyl 40 -140 66o-Terphenyl 40 -140 Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 400-598655/3-A Matrix: Water Prep Type: Total/NA Analysis Batch: 598830 Prep Batch: 598655 C19-C36 Aliphatics 1820 1732 ug/L 95 40-140 8 50 Analyte LCSD LCSD DUnitResultQualifier %Rec Spike Added %Rec Limits LimitRPD RPD C9-C18 Aliphatics 1360 1162 ug/L 85 40-140 2 50 1-Chlorooctadecane 40 -140 Surrogate 84 LCSD LCSD Qualifier Limits%Recovery Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 400-598655/3-A Matrix: Water Prep Type: Total/NA Analysis Batch: 598833 Prep Batch: 598655 C11-C22 Aromatics 3860 3923 ug/L 102 40-140 13 50 Analyte LCSD LCSD DUnitResultQualifier %Rec Spike Added %Rec Limits LimitRPD RPD Eurofins Savannah Page 18 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 QC Sample Results Job ID: 680-224036-1Client: S&ME, Inc. Project/Site: GCS Bus Garage Method: MA-EPH - Massachusetts - Extractable Petroleum Hydrocarbons (GC) (Continued) Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 400-598655/3-A Matrix: Water Prep Type: Total/NA Analysis Batch: 598833 Prep Batch: 598655 2-Bromonaphthalene 40 -140 Surrogate 53 LCSD LCSD Qualifier Limits%Recovery 652-Fluorobiphenyl 40 -140 72o-Terphenyl 40 -140 Method: 6010D - Metals (ICP) Client Sample ID: Method BlankLab Sample ID: MB 680-747365/1-A Matrix: Water Prep Type: Total Recoverable Analysis Batch: 747848 Prep Batch: 747365 RL MDL Chromium, Total ND 10.0 1.10 ug/L 10/27/22 13:57 10/28/22 17:10 1 MB MB Analyte Dil FacAnalyzedPreparedDUnitResultQualifier ND 6.6010.0 ug/L 10/27/22 13:57 10/28/22 17:10 1Lead, Total Client Sample ID: Lab Control SampleLab Sample ID: LCS 680-747365/2-A Matrix: Water Prep Type: Total Recoverable Analysis Batch: 747848 Prep Batch: 747365 Chromium, Total 100 101.9 ug/L 102 80-120 Analyte LCS LCS DUnitResultQualifier %Rec Spike Added %Rec Limits Lead, Total 505 497.6 ug/L 99 80-120 Eurofins Savannah Page 19 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 QC Association Summary Job ID: 680-224036-1Client: S&ME, Inc. Project/Site: GCS Bus Garage GC/MS VOA Analysis Batch: 599363 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch Ground Water SM6200-B680-224036-1 MW-1 Total/NA Water SM6200-BMB 400-599363/4 Method Blank Total/NA Water SM6200-BLCS 400-599363/1002 Lab Control Sample Total/NA GC/MS Semi VOA Prep Batch: 748153 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch Ground Water CWA_Prep680-224036-1 MW-1 Total/NA Water CWA_PrepMB 680-748153/1-A Method Blank Total/NA Water CWA_PrepLCS 680-748153/2-A Lab Control Sample Total/NA Water CWA_PrepLCSD 680-748153/3-A Lab Control Sample Dup Total/NA Analysis Batch: 748486 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch Ground Water 625.1 748153680-224036-1 MW-1 Total/NA Water 625.1 748153MB 680-748153/1-A Method Blank Total/NA Water 625.1 748153LCS 680-748153/2-A Lab Control Sample Total/NA Water 625.1 748153LCSD 680-748153/3-A Lab Control Sample Dup Total/NA GC VOA Analysis Batch: 599740 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch Ground Water MAVPH680-224036-1 MW-1 Total/NA Water MAVPHMB 400-599740/5 Method Blank Total/NA Water MAVPHLCS 400-599740/3 Lab Control Sample Total/NA Water MAVPHLCSD 400-599740/4 Lab Control Sample Dup Total/NA GC Semi VOA Prep Batch: 598655 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch Ground Water 3511680-224036-1 MW-1 Total/NA Water 3511MB 400-598655/1-A Method Blank Total/NA Water 3511LCS 400-598655/2-A Lab Control Sample Total/NA Water 3511LCSD 400-598655/3-A Lab Control Sample Dup Total/NA Analysis Batch: 598830 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch Ground Water MA-EPH 598655680-224036-1 MW-1 Total/NA Water MA-EPH 598655MB 400-598655/1-A Method Blank Total/NA Water MA-EPH 598655LCS 400-598655/2-A Lab Control Sample Total/NA Water MA-EPH 598655LCSD 400-598655/3-A Lab Control Sample Dup Total/NA Analysis Batch: 598833 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch Ground Water MA-EPH 598655680-224036-1 MW-1 Total/NA Water MA-EPH 598655MB 400-598655/1-A Method Blank Total/NA Water MA-EPH 598655LCS 400-598655/2-A Lab Control Sample Total/NA Water MA-EPH 598655LCSD 400-598655/3-A Lab Control Sample Dup Total/NA Eurofins Savannah Page 20 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 QC Association Summary Job ID: 680-224036-1Client: S&ME, Inc. Project/Site: GCS Bus Garage Metals Prep Batch: 747365 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch Ground Water 3005A680-224036-1 MW-1 Total Recoverable Water 3005AMB 680-747365/1-A Method Blank Total Recoverable Water 3005ALCS 680-747365/2-A Lab Control Sample Total Recoverable Analysis Batch: 747848 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch Ground Water 6010D 747365680-224036-1 MW-1 Total Recoverable Water 6010D 747365MB 680-747365/1-A Method Blank Total Recoverable Water 6010D 747365LCS 680-747365/2-A Lab Control Sample Total Recoverable Eurofins Savannah Page 21 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 Lab Chronicle Client: S&ME, Inc.Job ID: 680-224036-1 Project/Site: GCS Bus Garage Client Sample ID: MW-1 Lab Sample ID: 680-224036-1 Matrix: Ground WaterDate Collected: 10/25/22 11:00 Date Received: 10/26/22 10:30 Analysis SM6200-B WPD11/05/22 16:321 EET PEN599363 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 5 mL 5 mL Instrument ID:Brutus Prep CWA_Prep 748153 11/01/22 13:33 LA EET SAVTotal/NA 544.4 mL 1 mL Analysis 625.1 1 748486 11/03/22 02:26 T1C EET SAVTotal/NA 1 mL 1 mL CMSKInstrument ID: Analysis MAVPH 1 599740 11/08/22 22:20 SAB EET PENTotal/NA 5 mL 5 mL CH_CAROLInstrument ID: Prep 3511 598655 11/01/22 07:14 JTC EET PENTotal/NA 56.2 mL 2 mL Analysis MA-EPH 1 598830 11/02/22 11:32 MP EET PENTotal/NA 1 mL 1 mL WALLEInstrument ID: Prep 3511 598655 11/01/22 07:14 JTC EET PENTotal/NA 56.2 mL 2 mL Analysis MA-EPH 1 598833 11/02/22 13:45 MP EET PENTotal/NA 1 mL 1 mL WALLEInstrument ID: Prep 3005A 747365 10/27/22 13:57 RR EET SAVTotal Recoverable 50 mL 50 mL Analysis 6010D 1 747848 10/28/22 17:49 BJB EET SAVTotal Recoverable ICPHInstrument ID: Laboratory References: EET PEN = Eurofins Pensacola, 3355 McLemore Drive, Pensacola, FL 32514, TEL (850)474-1001 EET SAV = Eurofins Savannah, 5102 LaRoche Avenue, Savannah, GA 31404, TEL (912)354-7858 Eurofins Savannah Page 22 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 Accreditation/Certification Summary Client: S&ME, Inc.Job ID: 680-224036-1 Project/Site: GCS Bus Garage Laboratory: Eurofins Savannah The accreditations/certifications listed below are applicable to this report. Authority Program Identification Number Expiration Date North Carolina (WW/SW)State 269 12-31-22 Laboratory: Eurofins Pensacola All accreditations/certifications held by this laboratory are listed. Not all accreditations/certifications are applicable to this report. Authority Program Identification Number Expiration Date Alabama State 40150 06-30-23 ANAB ISO/IEC 17025 L2471 02-23-23 Arkansas DEQ State 88-0689 09-01-23 California State 2510 06-30-23 Florida NELAP E81010 06-30-23 Georgia State E81010(FL)06-30-23 Illinois NELAP 200041 10-09-23 Kansas NELAP E-10253 10-31-23 Kentucky (UST)State 53 06-30-23 Kentucky (WW)State KY98030 12-31-22 Louisiana (All)NELAP 30976 06-30-23 Louisiana (DW)State LA017 12-31-22 Maryland State 233 09-30-23 Michigan State 9912 06-30-23 North Carolina (WW/SW)State 314 12-31-22 Oklahoma NELAP 9810 08-31-23 Pennsylvania NELAP 68-00467 01-31-23 South Carolina State 96026 06-30-23 Tennessee State TN02907 06-30-23 Texas NELAP T104704286 09-30-23 US Fish & Wildlife US Federal Programs A22340 06-30-23 USDA US Federal Programs P330-21-00056 05-17-24 Virginia NELAP 460166 06-14-23 West Virginia DEP State 136 03-31-23 Eurofins Savannah Page 23 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 Method Summary Job ID: 680-224036-1Client: S&ME, Inc. Project/Site: GCS Bus Garage Method Method Description LaboratoryProtocol SMSM6200-B Volatile Organic Compounds EET PEN 40CFR136A625.1 Semivolatile Organic Compounds (GC/MS)EET SAV MA DEPMAVPHMassachusetts - Volatile Petroleum Hydrocarbons (GC)EET PEN MA DEPMA-EPH Massachusetts - Extractable Petroleum Hydrocarbons (GC)EET PEN SW8466010DMetals (ICP)EET SAV SW8463005APreparation, Total Recoverable or Dissolved Metals EET SAV SW8463511Microextraction of Organic Compounds EET PEN SW8465030BPurge and Trap EET PEN 40CFR136ACWA_Prep Liquid-Liquid Extraction (Separatory Funnel)EET SAV Protocol References: 40CFR136A = "Methods for Organic Chemical Analysis of Municipal Industrial Wastewater", 40CFR, Part 136, Appendix A, October 26, 1984 and subsequent revisions. MA DEP = Massachusetts Department Of Environmental Protection SM = "Standard Methods For The Examination Of Water And Wastewater" SW846 = "Test Methods For Evaluating Solid Waste, Physical/Chemical Methods", Third Edition, November 1986 And Its Updates. Laboratory References: EET PEN = Eurofins Pensacola, 3355 McLemore Drive, Pensacola, FL 32514, TEL (850)474-1001 EET SAV = Eurofins Savannah, 5102 LaRoche Avenue, Savannah, GA 31404, TEL (912)354-7858 Eurofins Savannah Page 24 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 Page 25 of 27 11/14/2022 1234567 8 9 10 11 12 Login Sample Receipt Checklist Client: S&ME, Inc.Job Number: 680-224036-1 Login Number: 224036 Question Answer Comment Creator: Harley, Tynisha List Source: Eurofins Savannah List Number: 1 N/ARadioactivity wasn't checked or is </= background as measured by a survey meter. TrueThe cooler's custody seal, if present, is intact. TrueSample custody seals, if present, are intact. TrueThe cooler or samples do not appear to have been compromised or tampered with. TrueSamples were received on ice. TrueCooler Temperature is acceptable. TrueCooler Temperature is recorded. TrueCOC is present. TrueCOC is filled out in ink and legible. TrueCOC is filled out with all pertinent information. TrueIs the Field Sampler's name present on COC? TrueThere are no discrepancies between the containers received and the COC. TrueSamples are received within Holding Time (excluding tests with immediate HTs) TrueSample containers have legible labels. TrueContainers are not broken or leaking. TrueSample collection date/times are provided. TrueAppropriate sample containers are used. TrueSample bottles are completely filled. TrueSample Preservation Verified. TrueThere is sufficient vol. for all requested analyses, incl. any requested MS/MSDs TrueContainers requiring zero headspace have no headspace or bubble is <6mm (1/4"). TrueMultiphasic samples are not present. TrueSamples do not require splitting or compositing. N/AResidual Chlorine Checked. Eurofins Savannah Page 26 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12 Login Sample Receipt Checklist Client: S&ME, Inc.Job Number: 680-224036-1 Login Number: 224036 Question Answer Comment Creator: Perez, Trina M List Source: Eurofins Pensacola List Creation: 10/31/22 10:40 AMList Number: 2 N/ARadioactivity wasn't checked or is </= background as measured by a survey meter. TrueThe cooler's custody seal, if present, is intact. N/ASample custody seals, if present, are intact. TrueThe cooler or samples do not appear to have been compromised or tampered with. TrueSamples were received on ice. TrueCooler Temperature is acceptable. TrueCooler Temperature is recorded.0.0°C IR-9 TrueCOC is present. TrueCOC is filled out in ink and legible. TrueCOC is filled out with all pertinent information. TrueIs the Field Sampler's name present on COC? TrueThere are no discrepancies between the containers received and the COC. TrueSamples are received within Holding Time (excluding tests with immediate HTs) TrueSample containers have legible labels. TrueContainers are not broken or leaking. TrueSample collection date/times are provided. TrueAppropriate sample containers are used. TrueSample bottles are completely filled. N/ASample Preservation Verified. TrueThere is sufficient vol. for all requested analyses, incl. any requested MS/MSDs N/AContainers requiring zero headspace have no headspace or bubble is <6mm (1/4"). TrueMultiphasic samples are not present. TrueSamples do not require splitting or compositing. FalseResidual Chlorine Checked. Eurofins Savannah Page 27 of 27 11/14/2022 1 2 3 4 5 6 7 8 9 10 11 12