The URL can be used to link to this page

Home My WebLink About23012_Northgate Mall_GWMR_20200814TERRA iuest 9 9 -9 A� �F__. 2 - �Mi i I r�_ ENVIR6NMENTAL CONSULTANTS, P.C. MONITORING REPORT (July 28, 2020 sampling event) NORTHGATE SHELL 1130 WEST CLUB BOULEVARD DURHAM, DURHAM COUNTY, NORTH CAROLINA Latitude: 36.0171' N Longitude: 78.9111' W — UST basin from Google NCDWM-UST Incident No. 15968 Facility ID 0-015963 Risk Classification: Intermediate (1205A) Land Use: Commercial Release Information Date Discovered: 1993-1994 Estimated Release Quantity: Unknown Release Source: Underground Storage Tank System Capacity of USTs: (2) 10,000-gallon gasoline, (1) 6,000-gallon gasoline, and (2) 550-gallon heating oil USTs Capacity of Former USTs: (1) 550-gallon waste oil UST Responsible Party: Property Owner: Quality Oil Company, LLC NW PO LLC PO Box 2763 1819 Wazee St Winston-Salem, NC 27102 Denver, CO, 80202 Terraquest Project No. 02693 August 14, 2020 100 East Ruffin Street, Mebane, North Carolina 27302 Telephone (919) 563-9091 •Facsimile (919) 563-9095 www.terraquestpc.com TERRA iuest ENVIRONMENTAL CDNSULTANTS, P.G. August 14, 2020 Craig McIntosh NCDWM-UST Section Raleigh Regional Office 1628 Mail Service Center Raleigh, NC 27699-1628 Re: Monitoring Report Submittal (15968-025) Northgate Shell Station 1130 W. Club Blvd., Durham, Durham County NCDWM-UST Incident No. 15968 Terraquest Project No. 02693 Dear Mr. McIntosh: VIA EMAIL On behalf of Quality Oil Company, LLC, Terraquest Environmental Consultants, P.C. hereby submits the enclosed Monitoring Report for the release incident at the former Northgate Shell Station located in Durham, NC. The monitoring event confirms the presence of GCL violations that are keeping the release an Intermediate Risk. Additional monitoring per the CAP is recommended. Please contact us at (919) 563-9091 with any questions or concerns you may have. Thank you. Sincerely, TERRAQUEST ENVIRONMENTAL CONSULTANTS, P.C. 0 Ryan D. Kerins Project Manager Enclosed: Monitoring Report cc: Quality Oil Company — Don McIver via email Jonathan Stewart of Northwood Retail via email: jstewart@northwoodretail.com 100 East Ruffin Street, Mebane, North Carolina 27302 Telephone (919) 563-9091 •Facsimile (919) 563-9095 www.terraquestpc.com CERTIFICATION FOR THE SUBMITTAL OF AN ENVIRONMENTAL / GEOLOGICAL ASSESSMENT Attached is the Monitoring Report for: Site Name: Northgate Shell Address: 1130 West Club Boulevard City: Durham State: NC Zip Code: 27701 Responsible Party: Quality Oil Company, LLC Address: PO Box 2763 City: Winston-Salem State: NC Zip Code: 27102 Property Owner: NW PO LLC Address: 1819 Wazee St City: Denver State: CO Zip Code: 80202 I, Michael J. Brown, a Licensed Geologist in the State of North Carolina for TERRAQUEST ENVIRONMENTAL CONSULTANTS, P.C. do hereby certify that I am familiar with and have reviewed all material including figures within this report and that to the best of my knowledge the data, site assessments, figures, and other associated materials are correct and accurate. All work was performed under my direct supervision. My seal and signature is affixed below. Additional seals and/or signatures are also affixed below. Terraquest Environmental Consultants, P.C. is licensed to practice geology and engineering in North Carolina. The geology certification number of the corporation is C-291. The engineering certification number of the corporation is C-4634. Engineering is practiced out of the Cary, NC office. TERRAQUEST ENVIRONMENTAL CONSULTANTS, P.C. Ryan D. Kerins Project Manager Michael J. Brown, P.G. President Monitoring Report (7/28/20 event) Prepared by: Terraquest Environmental Consultants, P.C. Prepared: August 14, 2020 i Quality Oil Company, LLC Northgate Shell Durham, NC TABLE OF CONTENTS ENVIRONMENTAL ACRONYMS......................................................... EXECUTIVE SUMMARY..................................................................... 1.0 INTRODUCTION.................................................................... 2.0 SITE HISTORY AND CHARACTERIZATION .............................. 3.0 GROUNDWATER FLOW DIRECTION ...................................... 4.0 GROUNDWATER MONITORING ............................................ 5.0 FREE PRODUCT REMOVAL .................................................... 6.0 SOIL REMEDIATION.............................................................. 7.0 GROUNDWATER REMEDIATION........................................... 8.0 CONCLUSIONS / RECOMMENDATIONS ................................ 9.0 LIMITATIONS........................................................................ RFFFRFr\I(F TABLES 1. Site History (UST and AST System Information) 2. Surrounding Property Owners 3. Monitoring Well Construction Information 4. Summary of Groundwater Sampling Results 5. Summary of Soil Sampling Results 6. Summary of Soil Sampling Results — Soil Quality Confirmation 7. Summary of Soil Sampling Results - Excavation FIGURES 1. Site Location Map 2. Site Vicinity Map 3. Site Layout Map 4. Potentiometric Surface Map (7/28/20) 5. Groundwater Analytical Map (7/28/20) 6. Soil Sample Location Map APPENDICES A. Technical Methods / Standard Procedures B. Chronological Site History C. Historical Groundwater Data D. Analytical Report ............................................ III ............................................ iv ............................................. 1 ............................................. 1 ...........................................10 ...........................................10 ........................................... 11 ........................................... 11 ...........................................13 ...........................................15 ........................................... 15 ........................................... 16 Monitoring Report (7/28/20 event) Prepared by: Terraquest Environmental Consultants, P.C. Prepared: August 14, 2020 ii Quality Oil Company, LLC Northgate Shell Durham, NC ENVIRONMENTAL ACRONYMS 2L Standard Groundwater Standards Title 15A NCAC 2L NPDES National Pollutant Discharge 0.0202(g) Elimination System 2B Standard Surface Water Standards Title 15A NCAC 2B OVM Organic Vapor Meter AFVR Aggressive Fluid -Vapor Recovery PID Photoionization Detector AST Aboveground Storage Tank PLC Programmable Logic Controller BGL Below Ground Level POCO Parnell Oil Company BTEX Benzene, toluene, ethylbenzene, xylenes POE Point of Entry (water treatment system) C&D Construction and Demolition POTW Publicly Owned Treatment Works CAP Corrective Action Plan RBCA Risk Based Corrective Action CAPR Corrective Action Performance Report RDL Reporting Detection Limit CADR Corrective Action Design Report RP Responsible Party CSA Comprehensive Site Assessment SCFM Standard Cubic Feet per Minute DPE Dual -phase Extraction SVE Soil Vapor Extraction EPA Environmental Protection Agency STF Leaking UST State Trust Fund ePATA Electronic Pre -Approval Task Authorization STG Soil to Groundwater EPH Extractable Petroleum Hydrocarbons TA Task Authorization ESA Environmental Site Assessment TCC Target Cleanup Concentrations GCL Gross Contamination Level Terraquest Terraquest Environmental Consultants, LEL Lower Explosive Limit P.C. LSA Limited Site Assessment TPH Total Petroleum Hydrocarbon IPE di -Isopropyl Ether UST Underground Storage Tank ISCO In -situ Chemical Oxidation VOA Volatile Organic Analysis MADEP Massachusetts Department of Environmental VOC Volatile Organic Compound Protection VPH Volatile Petroleum Hydrocarbons MDL Method Detection Limit XP Explosion Proof MNA Monitored Natural Attenuation MMPE Mobile Multi -Phase Extraction MSCC Maximum Soil Contaminant Concentration MSL Mean Sea Level MSW Municipal Solid Waste MTBE Methyl tertiary -Butyl Ether NC North Carolina NCAC NC Administrative Code NCDENR NC Department of Environment and Natural Resources NCDEQ NC Department of Environmental Quality NCDOT NC Department of Transportation NCDWM-SW NC Division of Waste Management's Solid Waste Section NCDWM-UST NC Division of Waste Management's UST Section NCDWQ NC Division of Water Quality NFA No Further Action NORR Notice of Regulatory Requirements NORP Notice of Residual Petroleum NOV Notice of Violation Monitoring Report (7/28/20 event) Quality Oil Company, LLC Prepared by: Terraquest Environmental Consultants, P.C. Northgate Shell Prepared: August 14, 2020 iii Durham, NC EXECUTIVE SUMMARY On behalf of Quality Oil Company, LLC, Terraquest Environmental Consultants, P.C. is reporting the results of monitoring efforts associated with the UST petroleum release at the former Northgate Shell facility. There are no sensitive receptors as applicable to this release incident. The site is ranked an Intermediate Risk. While free product was absent during the subject event, GCL violations remain. Continued monitoring is recommended. Monitoring Report (7/28/20 event) Quality Oil Company, LLC Prepared by: Terraquest Environmental Consultants, P.C. Northgate Shell Prepared: August 14, 2020 iv Durham, NC 1.0 INTRODUCTION On behalf of the responsible party, Quality Oil Company, LLC, Terraquest Environmental Consultants, P.C. has prepared this Monitoring Report for the Northgate Shell facility located in Durham, Durham County, North Carolina. Following the CAP -approved soil excavation, remediation at this site now focuses on natural attenuation monitoring of groundwater. This report documents the groundwater sampling event that took place on July 28, 2020. Activities detailed in this report were pre -approved on ePATA 15968-025. The site location is depicted in Figure 1. The surrounding vicinity is shown in Figure 2. The site layout is depicted in Figure 3. Terraquest's technical methods and standard procedures are detailed in Appendix A. 2.0 SITE HISTORY AND CHARACTERIZATION A detailed chronological site history is provided in Appendix B. 1. UST Owner Information The owner of the previous USTs with the release incident was Quality Oil Company, LLC. The Northgate Shell facility was operated by Quality as a retail fuel station and automotive repair shop from 1981 until being sold in 1998. USTs and ASTs formerly and currently operated at the site are summarized in Table 1. 2. UST Tank Information According to the NCDWM-UST Registered Petroleum Database, the former UST system included six tanks. Tanks T1 and T2 were 10,000-gallon gasoline tanks installed on January 12, 1968. A 6,000-gallon gasoline tank, T3, was installed on January 12, 1970. A waste oil tank, T4, was installed on May 5, 1969. Additionally, two, 550-gallon heating oil tanks were installed at some unknown point. Two 250-gallon heating oil and one 250-gallon waste oil ASTs installed at an unknown time have also been present. Monitoring Report (7/28/20 event) Quality Oil Company, LLC Prepared by: Terraquest Environmental Consultants, P.C. Northgate Shell Prepared: August 14, 2020 1 Durham, NC In preparation for closure of tanks T1 — T3, T5 & T6, on July 11, 2014, Terraquest personnel submitted a UST-3 Notice of Intent form to the NCDWM-UST. On July 26, 2014, work was initiated to prep the site for UST removal. Prep work at the site included turning off power to the dispensers and cathodic protection, removal of the dispensers, and removal of concrete/asphalt and dirt from above the USTs. The canopy, overhanging the front of the store, was removed to allow remedial excavation to proceed following tank closure. Prior to removing the USTs on July 28, 2014, any residual liquid present in the tanks was removed and tanks were subsequently cleaned and degassed by Zebra Environmental and Industrial Services of High Point, NC. Under supervision of the City of Durham Fire Marshall, each tank was measured for LEL with an organic vapor monitor and certified as safe for removal. The tanks were removed with a track hoe excavator and taken off site for disposal at Always Buying Scrap in Durham, NC. Excavation activities were handled by Zava Industrial, Inc. of Burlington, NC. On July 28, 2014, Terraquest personnel supervised the removal of USTs (T1— T3, T5 & T6). UST T4 was closed by another party on January 12, 1988. Terraquest personnel inspected each tank following its removal. Upon inspection, USTs T1 — T3 were found to be in good condition with minimal rusting. Rusting, pitting, and holes were observed along the top, bottom, sides, and along the seams of USTs T5 & T6. Neither free product nor groundwater were present in the base of the tank pit. The former UST and AST locations are depicted in Figure 3. 3. Non -UST Information No non -UST release incident is documented at this site. 4. Release Description An initial release was documented as a loss of 25 gallons of super unleaded at about noon on May 28, 1985. A leaking joint was fixed to repair the release incident. The affair was detailed on a Pollution Incident Reporting Form. No further steps were thought necessary and the investigation was deemed complete. Monitoring Report (7/28/20 event) Quality Oil Company, LLC Prepared by: Terraquest Environmental Consultants, P.C. Northgate Shell Prepared: August 14, 2020 2 Durham, NC In January 1994, free product was discovered in a monitoring well located to the north of the Northgate Shell facility that was installed to investigate potential groundwater contamination in the vicinity of the Northgate Mall. Due to the detected contamination, the NCDEM targeted the Northgate Shell facility as the source of the release. After being notified of the suspected release, Quality immediately tested the system through tank and line tightness test, and line leak - detector tests and contacted Turner Environmental Consultants. P.C. to conduct environmental assessment activities required under 15A NCAC 2N .0603. Those activities documented the presence of free product and GCL violations in groundwater and soil contamination with TPH analytical results as high as 1,760 ppm. The results were provided in a Site Check and Initial Site Characterization Report submitted by Turner in December 1994. The report also details several offsite sources of contamination including the former Exxon/Northgate Automotive station located on the adjacent property to the west of the site (Incident No. 9552). The NCDEHNR re -ranked the site a 140 Priority B (free product) on a Pollution Incident / UST Leak Reporting Form on June 21, 1996. However, in a correspondence dated July 29, 1996, the NCDEHNR clarified that Session Bill 1317 did not consider free product as one of the ranking criteria for a "B" ranking, the site was re -ranked a 140 "E". Work was suspended. A March 9, 2009 NORR required free product assessment and recovery based on Session Law 2008-195. On June 9, 2009, Terraquest personnel gauged monitoring wells MW1, MW6, and MW7 for the presence of free product. No free product was detected during the free product investigation. Additional information regarding the free product evaluation is provided in the Free Product Evaluation Report submitted by Terraquest on July 20, 2009. No additional work was requested by the NCDWM-UST at the time. A September 2, 2010 NORR referenced NCGS 143-215.94E(e4) and stated that the Intermediate 205A ranking of the site was sufficient to direct assessment and remediation work for the release incident. Monitoring Report (7/28/20 event) Quality Oil Company, LLC Prepared by: Terraquest Environmental Consultants, P.C. Northgate Shell Prepared: August 14, 2020 3 Durham, NC No discrete release event has been documented for the USTs at the site. The estimated quantity of petroleum released to the subsurface from the USTs is unknown. 5. Site Characteristics The site is an auto service center. Gasoline is no longer sold at the former station. The property sits as an outlying parcel to the Northgate Mall that lies directly north. Interstate 1-85 is located to the east. Residential properties are located to the south. The Walltown Park Rec Center and the St. James Baptist Church Family Center are located to the west along with additional residential and commercial properties. An aerial view is provided: Monitoring Report (7/28/20 event) Quality Oil Company, LLC Prepared by: Terraquest Environmental Consultants, P.C. Northgate Shell Prepared: August 14, 2020 4 Durham, NC Zoning in the area from Durham County GIS is as shown on the following figure. Properties in the surrounding vicinity are zoned commercial (CC, CN, and CG), residential (RS and RU), and office and institutional (OI). 1:�1Y 13 1 :. 41" 1314 1605 13 121 1303 1310 13 08 151 134E I 114,: I 1121 1` , 1244 L_L� CN dr WClUbBIVJ 1124 1�43+IIi}I I 11139 —� � 1129 1�411412 �5 112211143 I~ —1�4_�2 1�1203 .1424 1112 1419142 1 1120 1420 14114 1E 111; I1 1417 2 ' 11 1 __4174 "; 1414 1 1 6 II 5 114141 13 U 1411414 1112Y7 /l/ m 141. El 412�1410 l14 1 1' V. 6. Monitoring Report (7/28/20 event) Quality Oil Company, LLC Prepared by: Terraquest Environmental Consultants, P.C. Northgate Shell Prepared: August 14, 2020 5 Durham, NC Creek to the east. The subsurface geology is composed of conglomerate, fanglomerate, sandstone and mudstone of the Chatham Group. The following lithologies were encountered at the site during the installation of soil borings and the monitoring well network: 0' — 0.5' below ground level (BGL): Asphalt/Concrete 0.5' — 5' BGL: Sandy Lean Clay (CL) Mostly stiff, orange/brown/gray clay with some coarse grain sand. 5' —12' BGL: Fat Clay (CH): Mostly stiff, brown/orange/gray clay with some coarse grain sand. 12' — 25' BGL: Sandy Lean Clay (CL) Mostly stiff, brown/gray clay with few coarse grain sand. Soil becomes more consolidated with depth. 25' — 28' BGL: Saprolite Mostly dense, light orange/white characteristics of sand and clay. 28' — 40': Bedrock Sandstone/mudstone Monitoring Report (7/28/20 event) Quality Oil Company, LLC Prepared by: Terraquest Environmental Consultants, P.C. Northgate Shell Prepared: August 14, 2020 6 Durham, NC 50.00' Generalized subsurface lithologies are shown in the following geologic cross -sections: A MW16 MW15 MW2 MW11 MW18 MW17 MW13 MW14 MW7 B D' innnn' MW12 MWS MW11 90.a0' --- "` - - - - ------ - - - - - ----- - - - - - 70.00' 60,00' C MW10 LEGEND WATTS ST. MW0 — MW7 —MW19 — — —MWS - - - - - - - - - - - Fat Clay/Lean Clay (CH/CL) Mostly stiff, brown/black clay with some to little coarse grain sand. Silt (ML) Mostly medium stiff, orange brown silt with some sand and clay. Clayey Sand (SC) Mostly dense, green/black coorse grain sand with some clay. f{ Saprolite ,r r' Mostly stiff to hard, grey/green characteristics of silt, sand, and clay. Bedrock (Weathered in upper portions) 7-7-71 Backfill VIA A' BB&T MW11 C' Monitoring Report (7/28/20 event) Prepared by: Terraquest Environmental Consultants, P.C. Prepared: August 14, 2020 7 Quality Oil Company, LLC Northgate Shell Durham, NC NGRTHGATE YARLLf B C - n1w 1 z n1w7 0 1 A NQRTHGATE SHELL T K uw11 MW 7I ❑ — 14 A ,s o00 � uwz 1s 0 ---------- GRASS N 8 MW1 C e' W. CLUB BLVD. The local topography is characterized by moderately sloping topography with some relief. The entire area surrounding 1,000 feet of the site is mapped between 310 and 350 feet above sea level. Local topography is depicted in Figure 1. The release area is overlain by both asphalt and concrete parking lots with some small areas of grass and shrubs. Precipitation which falls on the uncovered portions of the site infiltrates the underlying soils. Excess runoff of the shallow soil drainage is directed toward several storm water drains located around the area. Through several site visits, Terraquest has not identified any surface water bodies within 500 feet of the release area. Surface water features are shown on Figure 2. Historical groundwater flow at the site decreases to the east, northeast. The water table fluctuates with historical mins and max depth to water measurements ranging between 11 and Monitoring Report (7/28/20 event) Quality Oil Company, LLC Prepared by: Terraquest Environmental Consultants, P.C. Northgate Shell Prepared: August 14, 2020 8 Durham, NC 21 feet BGL. The most recent groundwater flow map is provided as Figure 4. Historical groundwater elevation data is provided in Appendix C. Terraquest has previously performed contaminant fate and transport modeling to determine the likely migration of the contaminant plume with consideration to hydraulic and biodegradation conditions. With the lack of a critical receptor, Terraquest allowed the Bioscreen version 1.4 model to simply calculate the downgradient advancement without a specific target in mind. The model showed that groundwater contamination past 350 feet is unlikely. 7. Surrounding Property Owners and Occupants Surrounding property owner information is provided in Table 2. 8. Critical Receators On June 21, 1996, Patrick Perez of the NCDWM-UST completed a North Carolina Groundwater Contamination Incident Management Site Priority Ranking System. During the completion of the ranking system Mr. Perez indicated that there were no water supply wells located within 1,500 feet of the release area. 9. Summary of CAP Implementation The approved CAP called for the removal of contaminated soil, free product, and monitoring of natural attenuation. Those activities commenced with the August 2014 excavation of 3,823.24 tons of contaminated soil that was taken offsite for proper disposal. Free product was recovered through passive bailers until its absence. Groundwater monitoring events occur semi-annually. 10. ReaortinR Reports have been prepared and submitted to the NCDWM-UST regarding the release incident at the Northgate Shell at various project stages. Some of those include: Site Check Report, Monitoring Report (7/28/20 event) Quality Oil Company, LLC Prepared by: Terraquest Environmental Consultants, P.C. Northgate Shell Prepared: August 14, 2020 9 Durham, NC Monitoring Report, Free Product Recovery Report, Comprehensive Site Assessment Report, and a Corrective Action Plan. 3.0 GROUNDWATER FLOW DIRECTION Prior to purging and sampling on July 28, 2020, Terraquest personnel collected depth -to -water measurements from the monitoring well network and gauged select monitoring wells for the presence of free product. No free product was detected. Groundwater measurements were reduced to a common datum using previously established top of casing elevations for each well. The calculated water table elevations were plotted on a plan of the site and used to create a contour map of the water table surface as shown on Figure 4. As shown on Figure 4, the overall direction of groundwater flow is to the east-northeast as it has been historically. Groundwater elevation data is summarized in Table 3. Historical groundwater elevation data is provided in Appendix C. As shown in Appendix C, the recent water table has risen 1.23 feet since January 2020. 4.0 GROUNDWATER MONITORING On July 28, 2020, Terraquest personnel sampled monitoring wells MW2, MW6, MW9A, MW11, MW15, MW18, and MW20. Prior to sampling, each well was purged of at least three well volumes of water using a new disposable bailer. Bailers were then used to retrieve a representative groundwater sample from each well. Upon retrieval, samples were placed into the appropriate laboratory -prepared containers, labeled, and placed on ice pending shipment to a North Carolina -certified laboratory for analysis. The collected groundwater samples were submitted for analysis per 6200B. The analytical results of the sampling event revealed a GCL violation plume that measures 50 feet long by 35 feet wide and covers an area of 1,100 square feet. In comparison to the previous January 2020 sampling event, this is a reduction in size due to the absence of a GCL violation in Monitoring Report (7/28/20 event) Quality Oil Company, LLC Prepared by: Terraquest Environmental Consultants, P.C. Northgate Shell Prepared: August 14, 2020 10 Durham, NC monitoring well MW2. As shown in Appendix C, monitoring well MW2 has been absent GCL violations once before. Additional summary of the analytical results regarding petroleum -type compounds follows: Free Product: none >GCL: MW11, MW20 >2L Standards: MW2, MW6, MW9A, MW15, MW18 The groundwater analytical data is summarized in Table 4 and on Figure 5. Historical groundwater analytical data is provided in Appendix C. The full analytical report is in Appendix FRI 5.0 FREE PRODUCT REMOVAL Free product has historically been gauged in monitoring wells MW2, MW11, and MW20. However, free product was not detected in those wells during the recent event. 6.0 SOIL REMEDIATION Soil assessment was performed through various stages culminating in the excavation of 3,823.24 tons of contaminated soil in July and August, 2014. A total of one hundred soil samples were collected and submitted for laboratory analysis throughout assessment. An additional thirteen disposal samples and six excavation sidewall samples were also analyzed. The analytical results of those samples are summarized on Tables 5, 6, and 7. The sample locations are depicted on Figure 6. Terraquest personnel supervised the excavation of contaminated soil in the areas indicated on Figure 6 from July 29, 2014 through August 5, 2014. The limits of excavation were defined through soil samples collected from pre -excavation borings. Monitoring Report (7/28/20 event) Quality Oil Company, LLC Prepared by: Terraquest Environmental Consultants, P.C. Northgate Shell Prepared: August 14, 2020 11 Durham, NC Excavation of USTs and Dispensers Excavation in the area of the former USTs and dispensers was extended to the water table at seventeen feet BGL. A previously unknown buried 16-inch cement storm sewer line was uncovered at the southern edge of the excavation, along W. Club Boulevard, at a depth of 8 feet BGL. The storm sewer line cut across the site, running to the northeast and tying into a second storm sewer drain located on Watts Street. The line was observed entering the storm drain along Watts Street at a depth of 12 feet BGL. Contaminated soil located near the storm sewer was excavated to the top of the line. All contaminated soil was disposed of at the Earthtec of NC, Inc. soil disposal facility in Sanford, NC. Sidewall samples (SW1— SW5) were collected along the northern sidewall located parallel to the front of the current Northgate Shell building. Only the sidewall SW2 soil sample contained concentrations of C9 — C18 aliphatics and C9 — C22 aromatics exceeding the STG and Residential MSCCs, respectively. All other detections in the remaining soil samples were below their respective STG MSCCs. Excavation of Waste Oil UST Excavation in the area of the former waste oil UST was limited to ten feet BGL. The excavation was not able to be extended to the water table (17 feet) due to the unknown location of the buried storm sewer line. Sidewall sample SW6 was collected off the eastern side of the current Northgate Shell building and contained a C9 — C22 aromatic concentrations above its STG MSCC. Unexcavated Soils An area of contaminated soil remained unexcavated on the eastern side of the subject property. A portion of this area was deemed to be clean to a depth of ten feet BGL; however due to the unknown location of the buried storm sewer line it was infeasible to remove the clean over burden and undermine the existing utility. In addition, soil below a depth of 10 feet in the vicinity of the former waste oil UST could not be excavated. The area of unexcavated soil is depicted on Figure 6. Monitoring Report (7/28/20 event) Quality Oil Company, LLC Prepared by: Terraquest Environmental Consultants, P.C. Northgate Shell Prepared: August 14, 2020 12 Durham, NC 7.0 GROUNDWATER REMEDIATION The approved CAP for this release incident calls for the use of passive bailers to remove free product and natural attenuation to reduce dissolved -phase contaminants to concentrations below the GCLs. Free product has been absent since 2018. Natural attenuation is monitored as detailed in the previous sampling discussion. Groundwater monitoring occurs on a semi-annual basis. A study of contaminant mass is performed by reviewing the plume over time as shown: 7/28/20: Mw12 MW10 ESTIMATED EXTENT OF GCL VIOLATION ]AUTOMOTIVE NORTHGATE SHELL AST 4 MW Mw9A MW6 $ MW7A� MW' 1,100 ft2 GCL MN14 Tz M1 MW79 5 *MW2 MW20+ MW1 T3 MW11 GRASS +MW19 Mw ❑ ❑ ❑ �Mws 6/21/13: FREE GCL EXTENT PRODUCT Is F r, r �IAi'18 W. [sue 9LVD. 1 9,900 ft2 GCL S AEU wn Y*Y kM I f1fGY1 .' 0 0 WW17h V) cn Q Monitoring Report (7/28/20 event) Quality Oil Company, LLC Prepared by: Terraquest Environmental Consultants, P.C. Northgate Shell Prepared: August 14, 2020 13 Durham, NC 1/3/19: 2/27/18: / ESTIMATED EXTENT OF JN OR1116A1I ::SI II / T4 w NORTHGATE SHELL /// iwlsn I.dh / IMV'/i 4N, . MW MWJ 3 %%O FORME MG4IETI iOMOTME O eMW14 N18 `XNi1J AN2 NI'VJ� \ \ LMI 1` �P�1'.ti l' ¢ + WIS y �p MW2 W20 y MI � MW12A *� W1 zay �\ L MWI1$ n=s 1 an1# � �alnn•1a ""'. cross +Mw1a 3,400 ft2 GCL r 210 ft2 GCL ESTIMATED EXTENT OF - -- FREE PRODUCT ESTIMATED EXTENT OF 8/9/17: 1/10/17: MW12 ESTIMATED EXTENT OF )ESTIMATED EXTENT OF GCL VIOLATION GCL VIOLATION NORTHGATE SHELL ,a'sn K NORTHGATE SHELL Mw5 MW]Ay+MW] MW6� MW]W] MW14 MWt fi� uw+ W15 �MW2 TI =41 MY 1MW2 MW20 MWWMW11MW1]�A$$GRASS �M W18 MW1 TA $Mwa ESTIMATED EXTENT OF 3,400 ft2 GCL ESTIMATED EXTENT OF 3,300 ft2 GCL FREE PRODUCT FREE PRODUCT W. CLUB BLVD. W. CLUB BLVD. 6/2/16: 12/1/15: yMW12 � MW10 &M W10 ESTIMATED EXTENT OF ESTIMATED EXTENT OF GCL VIOLATION GCL VIOLATION � NORTHGATE SHELLA �^ NORTHGATE SHELL 4a'Mwsn 3 MW� MW]s�W] 5 O �Mw1 O $MW14 MW1 15 W2 M 0 MW1M3A$ MW19 MW1 MW19 w15 � Wz M 0 MW13 MW1 MW1 GRASS $ �MW18 Mw JA MW, GRAss Mw1e Mw J O MOD A$ ESTIMATED EXTENT OF FREE PRODUCT ESTIMATED FREE PRODUCT OF 2 700 ft2 G C L W. CLUB BLVD. [37,600 ft2 GCL W. CLUB BLVD. 6/30/15: 6/21/13: 1 MW12 MW12 Mw10 Iw10 ESTIMATED EXTENT OF GCL VIOLATION NO RTH GATE SHE 44"Mwsn NORTH SHELL +uwaa' 3 ® WJ MW14 MW1� O �MW14� MW1� W15 MW o MW�.� MW19 w15 Tx MW 3 MW19 �[a1 a'axoo T1 MW1 �I tau• rx7% GRASS MWI] GRASS ... MW1S �MW18 MW1J� $ MWf ]A' MW1 MW1 ESTIMATED EXTENT of FREE PRODUCT 3,800 ft2 GCL 9,900 ft2 GCL W. CLUB BLVD. W. CLUB BLVD. Monitoring Report (7/28/20 event) Quality Oil Company, LLC Prepared by: Terraquest Environmental Consultants, P.C. Northgate Shell Prepared: August 14, 2020 14 Durham, NC 8.0 CONCLUSIONS / RECOMMENDATIONS A July 28, 2020 groundwater monitoring event at the Northgate Shell facility revealed the absence of product but the presence of GCL violations in two wells. GCLs are the cleanup standards for this Intermediate Risk site. The overall footprint of the plume is smaller due to the absence of a GCL violation in monitoring well MW2. Terraquest recommends continued monitoring. 9.0 LIMITATIONS This report is limited to the investigation of petroleum hydrocarbons only and does not imply that other unforeseen adverse impacts to the environment are not present at the facility. In addition, subsurface heterogeneities not identified during the current study may influence the migration of groundwater or contaminants in unpredicted ways. The limited amount of sampling and testing conducted during this study cannot practically reveal all subsurface heterogeneities. Furthermore, the subsurface conditions, particularly groundwater flow, elevation, and water quality may very through time. The opinions and conclusions arrived at in this report are in accordance with industry -accepted geologic and hydrogeologic practices at this time and location. No warranty is implied or intended. Monitoring Report (7/28/20 event) Quality Oil Company, LLC Prepared by: Terraquest Environmental Consultants, P.C. Northgate Shell Prepared: August 14, 2020 15 Durham, NC REFERENCE Brown, et al., 1985. Geologic Map of North Carolina, North Carolina. Department of Natural Resources and Community Development, 1:500,000 scale. Monitoring Report (7/28/20 event) Quality Oil Company, LLC Prepared by: Terraquest Environmental Consultants, P.C. Northgate Shell Prepared: August 14, 2020 16 Durham, NC TABLES Table 1 SITE HISTORY (UST and AST SYSTEM INFORMATION) Date: 7/29/20 Incident Name: Northgate Shell Incident No. 15968 Facility ID No: 0-015963 Capacity UST Product (Gallons) Dimensions Date Installed Date Closed Release Discovered T1 Gasoline 10,000 8' x 26'8" 1/12/68 7/28/14 Yes T2 Gasoline 10,000 8' x 26'8" 1/12/68 7/28/14 Yes T3 Gasoline 6,000 8' x 16' 1/12/70 7/28/14 Yes T4 Waste Oil 550 45.5" x 76" 5/5/69 1/12/88 Yes T5 Heating Oil 550 45" x 72" unknown 7/28/14 Yes T6 Heating Oil 550 45" x 72" unknown 7/28/14 Yes AST1 Heating Oil 250 27.25" x 5 'x 44.5" unknown - No AST2 Heating Oil 250 27.25" x 5' x 44.5" unknown - No AST3 Waste Oil 250 33.5" 48.5" unknown - No Notes: 1. Information obtained from the North Carolina UST Database Records and field observations. 2.T=UST 3. AST = Aboveground Storage Tank Table 2 SURROUNDING PROPERTY OWNERS Date: 7/29/20 Incident Name: Northgate Shell Incident No. 15968 Facility ID No. 0-015963 Tax Parcel Number (PIN Property Owner Property Owner Address Property Address Number) 0822-11-65-2285 Northgate Aoociates PO Box 2476 1058 W. Club Blvd. ATTN: Gerry Boyle Durham, NC 27715 Durham, NC 27701 0822-15-64-2908 Tisa White Rogers 2900 E. Petrigre St. 1141 W. Club Blvd. Durham, NC 27703 Durham, NC 27701 0822-15-64-2968 Tisa White Rogers 2900 E. Petrigre St. 1139 W. Club Blvd. Durham, NC 27703 Durham, NC 27701 0822-15-64-3957 EWGNC, LLC 1424 Watts St. 1424 Watts St. Durham, NC 27701 Durham, NC 27701 SITE 0822-11-65-3115 NW PO LLC 1819 Wazee St 1130 W. Club Blvd. Denver, CO, 80202 Durham, NC 27701 Notes: 1. Information gathered from field interviews and Durham County GIS Online. 2. Last 4 digits of MAP ID numbers correspond with those displayed on Figure 2. Table 3 MONITORING WELL CONSTRUCTION INFORMATION Date: 7/28/2020 Incident Name: Northgate Shell Incident No. 15968 Facility ID No.: 0-015963 Well ID Date Installed Date Water Level Measured Well Casing Depth (ft. BGS) Screened Interval (x to y ft. BGS) Bottom of Well (ft. BGS) Top of Casing Elevation (ft.) Depth to Water from Top of Casing (ft.) Free Product Thickness (ft.) Groundwater Elevation (ft.) Comments MW1 11/16/94 - 16 16-26 26 100.00 - - - 2"-diameter Type II MW2 11/16/94 7/28/20 16 16-26 26 100.24 11.05 0 89.19 2"-diameter Type II MW6 5/11/94 7/28/20 12 12-37 37 100.05 11.94 0 88.11 2"-diameter Type II MW7A 4/7/15 - 15 15-25 25 99.18 - - - 2"-diameter Type II MW8 11/15/11 - 10 10-25 25 99.49 - - - 2"-diameter Type II MW9A 4/7/15 7/28/20 15 15-25 25 99.46 14.40 0 85.06 2"-diameter Type II MW10 11/15/11 - 10 10-25 25 96.87 - - - 2"-diameter Type II MW11 11/21/11 7/28/20 10 10-25 25 99.53 10.90 0 88.63 2"-diameter Type II MW12 11/21/11 - 10 10-25 25 97.14 - - - 2"-diameter Type II MW13A 4/21/15 - 15 15-25 25 99.85 - - - 2"-diameter Type II MW15 3/13/12 7/28/20 15 15-25 25 100.65 11.00 0 89.65 2"-diameter Type II MW16 3/13/12 - 15 15-25 25 102.31 - - - 2"-diameter Type II MW17A 4/21/15 - 15 15-25 25 100.04 - - - 2"-diameter Type II MW18 3/13/12 7/28/20 15 15-25 25 99.77 10.95 0 88.82 2"-diameter Type II MW19 3/13/12 - 15 15-30 30 99.28 - - - 2"-diameter Type II MW20 4/21/15 7/28/20 15 15-25 25 99.36 11.26 0 88.10 2"-diameter Type II BB&TMW11 9/2/08 - 24 24-34 34 97.66 - - - 2"-diameter Type II Wells Abandoned Prior to July 2014 Excavation MW7 5/12/94 - 12 12-27 27 98.84 - - 2"-diameter Type II MW9 11/15/11 - 10 10-25 25 99.31 - - 2"-diameter Type II MW13 11/21/11 - 10 10-25 25 100.08 - - 2"-diameter Type II MW14 11/22/11 - OC: 28 F IC: 35 35-40 40 99.74 - - 2"-diameter Type III MW17 3/13/12 - 15 15-25 25 100.23 - - 2"-diameter Type II Notes: 1. All units in feet. 2. BGS Below Ground Surface. 3. -Not Measured. Table 4 SUMMARY OF GROUNDWATER SAMPLING RESULTS Date: 8/13/20 Incident Name: Northgate Shell Incident No.: 15968 Facility ID No.: 0-015963 m m 0 0 m 0 m 0 m 0 m 0 m 0 m 0 m 0 m 0 m 0 m 0 m 0 m 0 m 0 m 0 m 0 m 0 m 0 m 0 m 0 m 0 0 0 Anal tical Method N N 0 N 0 N 0 N 0 N 0 N 0 N 0 N 0 N 0 N 0 N 0 N 0 N 0 N 0 N 0 N 0 N 0 N 0 N 0 N 0 N Y ko ko ko kD kD kD LD kD LO 1Z Lo Ln Lo �.o LO Lo k.o Contaminant of Concern v v v °� L U1 N C C v C v v N v C N C S a) O O o C v C N v 61 C N 41 N N Q) O Q � U +'' Q �_ 41 C ) 0 L v O a E N C C v X C � �_ 0 N O Q �` Q O L +' a v C O L U 0 o - U •� H H N N - W ~ W O �... +-� 7 m m m ` N .--I O O i 0 _ •L C fV L r M (V O Well ID Date Collected m +�+ W O 2 a U < N Ln °1 in (B z C ate+ Ln N > MW2 7/28/2020 918 13,800 3,960 18,760 < 49.4 < 89.9 1,570 < 85.5 < 84.0 < 83.5 < 101 < 98.3 < 83.9 153 905 405 < 88.2 < 80.6 < 98.3 < 95.3 2,800 668 MW6 7/28/2020 3.15 < 1.83 < 1.77 < 1.79 1,210 50.6 < 22.7 < 1.71 < 1.68 < 1.67 3.75 < 1.97 < 1.68 2.45 < 1.28 < 1.53 < 1.76 2.6 < 1.97 < 1.91 < 1.68 < 1.76 MW9A 7/28/2020 157 43.8 141 175.7 65 11 < 22.7 24.7 10.6 2.1 < 2.03 6.2 11.7 38.9 71.9 83.4 < 1.76 < 1.61 < 1.97 5.7 112 73.4 MW11 7/28/2020 5,650 12,700 3,040 7,540 < 39.5 334 < 906 74 < 67.2 < 66.8 162 80 < 67.1 142 1,030 376 < 70.5 < 64.5 < 78.6 < 76.2 1,670 422 M W 15 7/28/2020 2,830 15,300 1,930 7,460 146 < 71.9 < 906 < 68.4 < 67.2 < 66.8 < 81.1 < 78.6 < 67.1 < 72.6 376 114 188 < 64.5 < 78.6 < 76.2 888 222 M W 18 7/28/2020 < 7.76 < 7.31 97.2 < 7.17 1,100 14.8 < 90.6 < 6.84 < 6.72 < 6.68 < 8.11 21 < 6.71 16.2 < 5.13 26.4 < 7.05 149 10.4 58.4 9.6 < 7.03 MW20 7/28/2020 9,950 21,300 2,760 11,600 195 700 < 2270 < 171 < 168 < 167 < 203 < 197 < 168 < 182 635 370 645 < 161 < 197 < 191 1,900 505 2L Standards 1 600 600 500 20 70 6000 70 70 70 0.4 70 25 70 6 70 70 0.7 3 0.03 400 400 Gross Contamination Levels 5,000 260,000 84,500 85,500 20,000 70,000 6,000,000 6,900 8,500 15,000 400 70,000 11,700 25,000 6,000 30,000 70,000 700 3,000 30 28,500 25,000 Notes: 1. Results reported in µg/L. 2. < - denotes less than the sample's method detection limit. 3. BOLD denotes a detected concentration above the method detection limit. 4. Shading denotes a GCL violation of a petroleum -type compound. Table 5 SUMMARY OF SOIL SAMPLING RESULTS Date: 7/29/20 Incident Name: Northgate Shell Incident No.: 15968 Facility ID No.: 0-015963 Analytical Method o O M Ln o o O 1n n co O �D 00 co O �D 00 co O �D 00 m O �.D 00 m O �D 00 m O �.D 00 m O � 00 co O Q0 00 oo O � 00 m O � 00 m O �.D 00 m O �.D 00 m O �.D co m O � 00 p N 00 00 O L.D 00 m O k.D 00 m O �.D 00 co O L.D 00 p O r` 00 p O r` 00 p O r` 00 p O r` 00 p O r` 00 p O r` 00 p O r` 00 p O r` � > w p Q g > w M Q 2 a w w p Q 2 w w p Q 2 > w p Q 2 a LU w p Q 2 cc O � m O 81 ID Contaminant of Concern C O F- O U bA d a O C w X O w 2: N C? O O U C O O :E U N a a �+ p C . 0 :E a C N Q O O C a O - O a L z Q d c a C N a �- E a C N a L E Li a U P a a U O a co a &-- O _ O a co O a co a U a C 0 a a U L Qu 00 u U i Q N r-1 n U of U L Q 00 ri C U U 'Q+co+ O_ _U M On c U Ln Ua yr oC Q O U U N U +O(O Q+ N c1 c U -0 (0 a }a Z a NLE C E O i USample Date Collected Sample Depth B1 11/15/94 3 4.11 - - - - - - - - - - - - - - -/- - - - - - - - - - - - - - B2 11/15/94 9 2.87 - - - - - - - - - - - - - -/- - - - - - - - - - - - - B3 11/15/94 3 103 - - - - - - - - - - - -/- - - - - - - - - - - B4 11/15/94 3 1,760 - - - - - - - - - - - -/- - - - - - - - - - B5 11/15/94 3 4.6 - - - - - - - - - - - - -/- - - - - - - - - - - B5 11/15/94 5-7 1.42 - - - - - - - - - - - -/- - - - - - - - - 65 11/15/94 13-15 287 - - - - - - - - - -/- - - - - - - - - 66 11/15/94 3 <0.01 - - - - - - - - - -/- - - - - - - - - - 66 11/15/94 13-15 473 - - - - - - - - - -/- - - - - - - - - 67 11/15/94 5-7 104 - - - - - - - - - -/- - - - - - - - - B9 11/15/94 7-9 206 - - - - - - - - - -/- - - - - - - - - B10 11/16/94 8-10 1,430 - - - - - - - - - -/- - - - - - - - - B10 11/16/94 13-15 2.6 - - - - - - - - - -/- - - - - - - - - 1311 11/16/94 2 4.6 - - - - - - - - - -/- - - - - - - - - 1311 11/16/94 6 7.1 - - - - - - - - - -/- - - - - - - - - TQB1 12/14/10 3'-5' <2.5 - - - - - - - - - -/- - - - - - - - - TQB2 12/14/10 3'-5' <3.1 - - - - - - - - - -/- - - - - - - - - TQB3 12/14/10 3'-5' 23 - - - - - - - - - -/- - - - - - - - - TQB4 12/14/10 3'-5' 30.2 - - - - - - - - - -/- - - - - - - - - TQB4 12/14/10 11'-13' <2.4 - - - - - - - - - -/- - - - - - - - - TQB5 12/14/10 3'-5' <2.9 - - - - - - - - - -/- - - - - - - - - - TQB5 12/14/10 11'-13' <2.1 - - - - - - - - - -/- - - - - - - - - TQ66 12/14/10 3'-5' 109 - - - - - - - - - -/- - - - - - - - - TQ66 12/14/10 8'-10' 16.4 - - - - - - - - - - -/- - - - - - - - - - TQB7 12/15/10 3'-5' 5.87 - - - - - - - - - - -/- - - - - - - - - - TQB7 12/15/10 8'-10' <2.5 - - - - - - - - - - -/- - - - - - - - - - TQB8 12/15/10 11'-13' <3.1 - - - - - - - - - - -/- - - - - - - - - - TQB9 12/15/10 3'-5' 12.1 - - - - - - - - - - -/- - - - - - - - - - TQB9 12/15/10 8'-10' 7.18 - - - - - - - - - - -/- - - - - - - - - - TQB10 12/15/10 3'-5' <3.4 - - - - - - - - - - -/- - - - - - - - - - - TQB10 12/15/10 11'-13' 70.9 - - - - - - - - - - -/- - - - - - - - - - - TQ1311 12/14/10 11'-13' 201 - - - - - - - - - - -/- - - - - - - - - - - TQB12 12/14/10 3'-5' 29.4 - - - - - - - - - - -/- - - - - - - - - - TQB12 12/14/10 7'-9' 272 - - - - - - - - - - -/- - - - - - - - - - - - TQB13 12/15/10 3'-5' 131 - - - - - - - - - - -/- - - - - - - - - - TQB13 12/15/10 8'-10' 178 - - - - - - - - - - -/- - - - - - - - - - TQB14 12/14/10 10'-12' <3.8 - - - - - - - - - - -/- - - - - - - - - - - TQB15 12/14/10 11'-13' <2.3 - - - - - - - - - - -/- - - - - - - - - - TQB16 12/15/10 8'-10' <2.7 - - - - - - - - - - -/- - - - - - - - - - TQB17 12/14/10 1'-2' 6.80 - - - - - - - - - - -/- - - - - - - - - - TQB18 12/14/10 1'-2' 18.3 - - - - - - - - - - -/- - - - - - - - - - TQB19 12/14/10 1'-2' <3.3 - - - - - - - - - - - - -/- - - - - - - - - - - TQB20 12/14/10 1'-2' <2.9 - - - - - - - - - - - - - - -/- - - - - - - - - - - - - - TQB21 12/14/10 1'-2' 195 - - - - - - - - - - - - - - -/- - - - - - - - - - - - - - - TQB22 12/14/10 1'-2' 946 - - - - - - - - - - - - - - -/- - - - - - - - - - - - - - - TQB23 8/29/11 8'-10' - <0.0013 <0.0013 <0.0013 <0.0038 <0.0013 <0.0013 <0.0013 <0.0013 <0.0013 <0.0013 <0.0013 - <0.0013 <0.0013 <0.0063/<0.21 <0.0013 <0.0013 <0.0013 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <4.9 - <13.1 18 19.9 36 276 TQB24 8/29/11 8'-10' <0.0013 <0.0013 <0.0013 0.0042 1 <0.0013 <0.0013 <0.0013 <0.0013 1 <0.0013 <0.0013 <0.0013 - <0.0013 <0.0013 <0.0063/<0.22 <0.0013 <0.0013 <0.0013 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.22 <5.5 - <14.2 24 29.5 39 14 TQB25 8/29/11 8'-10' <0.049 <0.24 <0.049 <0.15 <0.049 <0.049 <0.049 1 0.090 0.24 <0.049 - 0.088 <0.049 <0.24/<0.41 <0.049 <0.049 <0.049 0.049 0.067 0.052 0.049 0.11 0.071 0.091 32 - 740 52 200 39 176 TQB26 8/29/11 8'-10' <0.060 <0.30 <0.060 <0.18 <0.060 <0.060 <0.060 0.94 0.16 <0.060 <0.060 - <0.060 <0.060 <0.060/<0.89 <0.060 <0.060 <0.060 <0.89 <0.89 <0.89 <0.89 0.27 <0.22 <0.22 24 - 860 130 240 18 176 TQB27 8/29/11 8'-10' <0.0014 <0.0069 <0.0014 <0.0042 <0.0014 <0.0014 <0.0014 0.0022 <0.0014 0.0017 <0.0014 - <0.0014 <0.0014 <0.0069/<0.046 <0.0014 <0.0014 <0.0014 <0.046 <0.046 <0.046 <0.046 <0.046 <0.046 <0.046 <5.3 - 24 9.7 - 14.4 37 37 TQB28 8/29/11 8'-10' <0.0012 <0.0012 <0.0012 <0.0036 <0.0012 <0.0012 <0.0012 <0.0012 <0.0012 <0.0012 <0.0012 - <0.0012 <0.0012 <0.0060/- <0.0012 <0.0012 <0.0012 - - - - - - - <4.7 <4.7 - - <4.7 - - - TQB29 8/29/11 13'-15' <0.0013 <0.0065 <0.0013 <0.0039 <0.0013 <0.0013 0.0024 0.0021 <0.0013 <0.0013 <0.0013 - 0.0013 <0.0013 <0.0065/- <0.0013 <0.0013 <0.0013 - - - - <5.7 <5.7 - - <5.7 TQB30 8/29/11 13'-15' 0.058 <0.053 <0.053 <0.16 <0.053 <0.053 0.098 0.054 <0.053 <0.053 <0.053 - 0.094 0.13 0.30/- 0.15 0.30 0.088 - - - - 8.8 23 - - 8.1 TQB31 8/29/11 13'-15' 0.0031 <0.0012 <0.0012 <0.0037 0.0033 <0.0012 0.0043 0.0018 <0.0012 <0.0012 0.0016 - 0.0032 0.0027 <0.0062/- 0.0036 0.0077 0.0038 - - - - <5 <5 - - <5 TQB32 8/29/11 8'-10' 0.078 <0.0012 <0.0012 0.015 0.0019 <0.0012 <0.0012 <0.0012 <0.0012 <0.0012 <0.0012 - <0.0012 0.012 <0.0062/- <0.0012 0.0022 0.0018 - - - - <4.5 <4.5 - - <4.5 TQB33 8/29/11 13'-15' 1.8 <2.4 16 19 1.4 <0.48 1.9 0.83 <0.48 <0.48 <0.48 - 2 0.58 6.4/- 6.8 32 4.6 - - - - 72 160 - - 70 TQB34 8/29/11 11'-13' 0.79 <0.89 2 <0.54 0.65 <0.18 2.9 1.3 <0.18 <0.18 <0.18 - 2.1 <0.18 4/- 7.6 <0.18 <0.18 - - - - 220 170 - - 59 TQB35 8/29/11 8'-10' <0.0013 <0.0065 <0.0013 <0.0039 0.0016 <0.0013 <0.0013 <0.0013 <0.0013 <0.0013 <0.0013 - <0.0013 <0.0013 <0.0065/- <0.0013 <0.0013 <0.0013 - - - - <5.1 <5.1 - - <5.1 - TQB36 8/29/11 12'-14' - - <0.0011 <0.0055 <0.0011 <0.0033 <0.0011 <0.0011 <0.0011 <0.0011 <0.0011 <0.0011 <0.0011 - <0.0011 <0.0011 <0.0055/- <0.0011 <0.0011 <0.0011 - - - 6.6 5.4 - - <4.7 - TQB37 8/29/11 8'-10' <0.0012 <0.0058 <0.0012 <0.0035 <0.0012 <0.0012 <0.0012 <0.0012 <0.0012 <0.0012 <0.0012 - <0.0012 <0.0012 <0.0058/- <0.0012 <0.0012 <0.0012 - - <4.6 <4.6 - - <4.6 TQB38 8/29/11 5'-7' <0.0012 <0.0062 <0.0012 <0.0037 <0.0012 <0.0012 <0.0012 <0.0012 <0.0012 <0.0012 0.0016 - <0.0012 <0.0012 <0.0062/- <0.0012 <0.0012 <0.0012 - - <4.3 <4.3 - - <4.3 TQB39 8/29/11 8'-10' <0.0011 <0.0057 <0.0011 <0.0034 <0.0011 <0.0011 <0.0011 <0.0011 <0.0011 <0.0011 <0.0011 - <0.0011 <0.0011 <0.0057/- <0.0011 <0.0011 <0.0011 - - <4.2 <4.2 - - <4.2 TQB40 8/29/11 12'-14' <0.046 <0.23 0.10 1.3 0.22 <0.046 0.22 0.33 <0.046 <0.046 <0.046 - 0.18 0.20 2.9/- 0.19 2.3 0.91 - - 8.4 45 - - 19 TQB41 11/16/11 8'-10' - - - - - - - - - - - - - / - - - - - <4 <4 - - <1.3 TQB42 11/16/11 8'-10' - - - - - - / - - - <3.8 - 79 1,300 - 205 670 206 TQB43 11/16/11 11'-13' - - - - - - - / - - - <4 16.9 <12 13.3 59 166 TQB44 11/16/11 8'-10' - - - - - - - - / - - - <3.4 <14.4 <11 - <18.3 8.3 <0.53 TQB45 11/16/11 12-14' - - - - - - - - - / - - - <3.7 17.1 <12 30.2 - 25 326 TQB46 11/16/11 8'-10' - - - - - - - - - - / - - - <3.9 - 17.7 <13 - <14.3 7.3 236 TQB47 11/16/11 11'-13' - - - - - - - - - - / - - - - <4.6 - <16.6 <12 <13.5 20 116 TQB48 11/16/11 9'-10' - - - - - - - - - - / - - - <4 - <16 <12 <20.2 14 39 TQB49 3/14/12 14'-15' - - - - - - - - - - / - - - - - - - - 8.2 48 TQB50 3/14/12 14'-15' 0.21 <0.22 7.6 30 0.061 <0.044 1.6 0.66 <0.044 <0.044 <0.044 1.5 1.7 8.3/- 5.6 29 8.6 - - - - - - - 3.1 19 TQB51 3/14/12 13'-15' - - - - - - - - - - - - - / - - - - - - - - - 40 116 TQB52 3/14/12 13'-15' - - - - - - - - / - - - - - - - 1.2 38 TQB53 3/14/12 13'-15' - - - - - - - - - / - - - - - - - - - 1.2 22 TQB54 3/14/12 9'-10' <0.047 <0.047 <0.047 <0.14 0.095 <0.047 0.63 0.80 <0.047 <0.047 <0.047 0.16 0.56 0.52/<0.84 0.13 0.10 0.47 0.92 <0.84 <0.84 <0.84 <0.84 <0.84 2.8 <0.84 14 - 830 140 610 - - TQB55 3/14/12 14'-15' <0.38 <1.9 48 130 <0.38 <0.38 7.6 4.2 <0.38 <0.38 <0.38 0.42 10 10 15/- 37 140 55 - - - - - - - - - - - - - 6.1 38 TQB56 8/17/12 14'-15' - - - - - - - - - - - - - - / - - - - - - - - - - - 13 <0.53 TQB57 8/17/12 14'-15' - - - - - - - - / - - - - - - - - - - 20 <0.53 TQB58 8/17/12 14'-15' - - - - - - - - - - - / - - - - - - - - - - 13 19 TQB59 8/17/12 14'-15' - - - - - - - - - - - - / - - - - - - - - - - 8.9 <0.53 TQB60 8/17/12 14'-15' - - - - - - - - - - - - - / - - - - - - - - - - - 8 <0.53 TQB61 8/17/12 3'-5' <4.5 180 - - - - - - - - - - - - / - - - - - - - - - - - - - - Soil -to -groundwater MSCC - - 0.0056 4.3 4.9 4.6 0.091 0.37 4.3 3.3 0.44 NE 0.35 NE 1.7 31 0.16 1.7 8.5 8.3 940 0.35 1.2 0.096 39 290 56 270 68 540* 540 ## 31* 31 270 5.4 Residential MSCC - - 18 1,200 1,560 3,129 350 156 626 626 312 NE 156 NE 1,564 469 313 626 782 782 4,600 0.88 0.88 0.088 88 620 469 469 939 1,500 1,500 31,000 469 469 400 47 Industrial/Commercial MSCC - - 164 32,000 40,000 81,760 3,100 4,088 16,350 16,350 8,176 NE 4,000 NE 40,880 12,264 8,176 16,350 20,440 20,440 122,000 8 8 0.78 780 16,400 12,264 12,264 24,528 40,000 40,000 810,000 12,264 12,264 400 1,226 TPH Action Limit (at the time) 10 10 Notes: 1. All results in mg/kg. 2. Bold denotes a compound detection. 3. Shading denotes a Soil -to -groundwater MSCC violation. 4. "<" = less than sample detection limit. 5. Sample depths are in feet below ground level. 6. "MSCC" = Maximum Soil Contaminant Concentration. 7. Italics indicates a Residential MSCC violation. 8. * The C9-C12 MSCC is the C9-C18 MSCC and the C9-C10 MSCC is the C9-C22 MSCC. 9. Chromium concentrations have been adjusted assuming a background concentration of 24 mg/kg at boring TQ1356. Unadjusted numbers are provided in the full analytical report. Table 6 SUMMARY OF SOIL SAMPLING RESULTS : Soil Quality Confirmation Date: 7/29/20 Incident Name: Northgate Shell Incident No.: 15968 Facility ID No.: 0-015963 O m m m m m m m m m m m m m m m m m 0 M 0 I'D 0 I'D 0 I'D 0 1.0 0 �.o 0 LD 0 I'D 0 (.0 0 L.0 0 k.0 0 �D 0 L.0 0 1.0 0 I'D 0 �0 0 �.o 0 I'D Analytical Method oLn 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Contaminant of Concern v c v c 41 N N 41 C C C O N C N N O C: U i C N N 41 N N 61 Q C C O p N E N E 3 O X z; 0 Q Q ++ Q C U H H N m 2 LU m m i {2 O L O N L (O u1 Sample ID Date Collected Sample Depth cow a ¢ ° a z c BSA 6/3/14 3' - 5' <3.1 - - - - - - - - - - - - - - - - - 135A 6/3/14 8' - 10' <3.4 - - - - - - - - - - - - - - - - 135A 6/3/14 13' - 15' - 0.0092 0.0021 J 0.0264 0.0053 J 0.0071 <0.00091 <0.013 3.26 0.969 1.14 0.0042 J 3.74 5.42 <0.00089 <0.0011 0.0035 J <0.00089 BSA 6/3/14 15'- 19' - 0.0016 J 0.0010 J 0.0600 0.0034 J 0.0063 <0.00087 <0.013 0.0814 0.0253 0.0325 0.0113 0.0149 0.127 <0.00085 <0.0011 0.0032 J 0.0018 J TQB6A 6/3/14 3' - 5' 6.73 J - - - - - - - - - - - - - - - - TQ136A 6/3/14 8' - 10' <2.8 - - I - - - - I - - - - - - - - - - - TQB6A 6/3/14 11' - 13' - <0.00089 <0.00089 <0.00089 <0.00235 <0.00089 <0.00092 <0.013 <0.00089 <0.00089 <0.00089 <0.00089 <0.0018 <0.00089 <0.00089 <0.0011 <0.00089 <0.00089 TQB30A 6/3/14 8' - 10' 18.1 - - - - - - - - - - - - - - - - - TQB30A 6/3/14 13' - 15' - <0.059 <0.059 <0.059 <0.16 <0.059 <0.061 <0.89 0.370 0.217 J 0.405 0.278 J 0.475 0.685 <0.059 <0.075 0.182 J <0.059 TQB34A 6/3/14 8' - 10' <3.5 - - - - - - - - - - - - - - - - TQB42A 6/3/14 3' - 5' <3 - - - - - - - - - - - - - - - TQB42A 6/3/14 8' - 10' 8.83 - - - - - - - - - - - - - - TQB42A 6/3/14 13' - 15' - 0.0424 0.156 J 0.158 0.871 J <0.00095 <0.00098 0.0333 J 0.0226 0.0083 0.0170 0.0075 0.458 0.0690 0.0022 J 0.0017 J 0.0842 0.147 TQB42A 6/3/14 15'- 20' - 0.988 12.5 14.5 85 <0.068 <0.070 <1 2.6 1.04 2.21 0.812 19.4 8.55 0.120 J <0.085 1 53.7 14.8 TQB62 6/3/14 8' - 10' <3.3 - - - - - - - - - - - - - - - - - TQB63 6/3/14 8' - 10' 6.99 - - - - - - - - - - - - - - - - - Soil -to -groundwater MSCC - 0.0056 4.3 4.9 4.6 0.091 0.37 24 4.3 3.3 1.7 0.12 0.16 1.7 1.5 0.0074 8.5 8.3 Residential MSCC - 18 1,200 1,560 3,129 350 156 14,000 626 626 1,564 100 313 626 3,128 1.1 782 782 Industrial/Commercial MSCC - 164 32,000 40,000 81,760 3,100 4,088 360,000 16,350 16,350 40,880 4,000 8,176 16,350 81,760 10 1 20,440 20,440 TPH Action Limit (at the time) 10 Notes: 1. All results in mg/kg. 2. Bold denotes a compound detection. 3. Shading denotes a Soil -to -groundwater MSCC violation or a TPH Action Limit violation. 4. "<" = less than sample detection limit. 5. Sample depths are in feet below ground level. 6. "MSCC" = Maximum Soil Contaminant Concentration. 7. "J" = Indicates an estimated value. 8. "-" = Indicates compound not tested per that method. Table 7 SUMMARY OF SOIL SAMPLING RESULTS - Excavation Date: 7/29/20 Incident Name: Northgate Shell Incident No.: 15968 Facility ID No.: 0-015963 o_ o_ > W W W co m co m m m co m m co co co Go m coU L) U U U w w w w O O O O O O O O O O O O O O O O O O O O O O 0 0 0 0 Analytical Method M Ln m lD 00 lD 00 1.0 00 lD 00 1.0 � lD 00 W 00 lD 00 lD � LD 00 W 00 W 00 W 00 W � W 00 r- n 00 n 00 n 00 n �Ln ¢ ¢ ¢ ¢ 00 Contaminant of Concern v C v v C v � � C O O Y W 61 C 41 O O O N �_ N �_ v ++ ro of n U U U }' U N Vf C N N N O 0)> N L > L (6 L Q v O++ U ++ l6 t i Q ;B a)C 4J a1 4J C 2- p X Q H H p L N (O W m O ++ + 7 aT+ m U O Q ++ Q Lrt N O Y ca O i U1 00 U -1 U U N U Sample ID Date Collected Sample Depth O_ O_ N m O +�-� W O ~ W a U ¢ m N CO °�' O Ln z 0- N M QJ o 7 W N L o o Lf1 U Ol U �--I U C l U SDI 7/29/14 - 1,300 112 - - - - - - - - - - - - - - - - - - - - SD2 7/29/14 - 260 30.2 - - - - - - - - - - - - - - - - - - - SD3 7/29/14 - 600 40.4 - - - - - - - - - - - - - - - - - - SD4 7/29/14 - 670 13.8 - - - - - - - - - - - - - - - - - - SD5 7/29/14 - 380 933 - - - - - - - - - - - - - - - - - - SD6 7/29/14 - 1,000 8 J - - - - - - - - - - - - - - - - - - SD7 8/2/14 - 410 61.3 - - - - - - - - - - - - - - - - - - SD8 8/2/14 - 420 <9.40 - - - - - - - - - - - - - - - - SD9 8/2/14 - 460 50.4 - - - - - - - - - - - - - - - - - SD10 8/3/14 - 1,400 129 - - - - - - - - - - - - - - - - - SD11 8/3/14 - 640 19.1 - - - - - - - - - - - - - - - - - SD12 8/4/14 - 1,500 149 - - - - - - - - - - - - - - - - - - SD13 8/4/14 - 820 240 - - - - - - - - - - - - - - - - - - - SW1 7/29/14 8' - 9' - - <0.00049 <0.00056 <0.00054 <0.00183 0.0063 <0.0012 0.15 0.031 <0.00084 0.0018 <0.00072 <0.0012 <0.00074 <0.00068 <0.00077 <0.0720 <0.0546 <0.0684 <0.0743 <0.0760 <0.000861 <15.91 <12.9 15.17 SW2 7/29/14 9' - 10' - <0.0049 0.00058 J 0.0013 <0.00183 0.0024 <0.0012 0.025 <0.0022 0.085 0.14 0.074 <0.0012 0.11 <0.00068 <0.00077 <0.0729 0.260 J 1.35 0.426 J 0.0965 J 31.5 1,034 D 172 904 D SW3 7/29/14 9' - 10' - 0.0012 <0.00056 <0.00054 <0.001831 0.022 0.0017 0.14 0.032 0.004 0.008 0.0062 0.034 0.0061 <0.00069 <0.00077 <0.0723 <0.0548 0.0803 J <0.0745 <0.0763 <0.000846 18.58 <12.7 16.82 SW4 8/3/14 9' - 10' - <0.00051 <0.00058 <0.00056 <0.000829 0.036 0.013 0.039 <0.0023 <0.00087 0.0023 0.0013 <0.0013 0.0012 <0.00071 <0.00081 <0.0718 <0.0544 <0.0682 <0.0740 <0.0758 10.1 17.13 20.9 28.28 SW5 8/4/14 9' - 10' - - <0.00049 <0.00057 0.0018 0.00786 0.01 0.0023 0.11 0.013 <0.00085 <0.00063 <0.00073 <0.0013 0.00094 0.0038 0.0014 0.0687 J <0.0511 <0.0641 <0.0696 <0.0712 <0.000807 <12.4 16.1 <24.8 SW6 8/4/14 7'- 8' - - <0.00055 <0.00063 0.0036 0.01658 <0.00075 <0.0014 0.086 0.02 <0.00095 <0.00071 <0.00082 <0.0014 <0.00084 0.0029 <0.00088 <0.0737 0.0815 <0.0700 <0.0760 <0.0778 <0.000887 20.59 16.5 178.23 Soil -to -groundwater MSCC - - 0.0056 4.3 4.9 4.6 0.091 0.37 24 16 4.3 3.3 1.7 0.16 1.7 8.5 8.3 NE 47 3.6 56 270 68 540 # 31 Residential MSCC - - 18 1,200 1,560 3,129 350 156 14,000 9,385 626 626 1,564 313 626 782 782 NE 620 63 469 469 939 1,500 31,000 469 Industrial/Commercial MSCC - - 164 32,000 40,000 81,760 3,100 4,088 360,000 245,280 16,350 16,350 40,880 8,176 16,350 20,440 20,440 NE 16,400 1,635 12,264 12,264 24,528 40,000 810,000 12,264 TPH Action Limit (at the time) 10 10 Notes: 1. All results in mg/kg. 2. Bold denotes a compound detection. 3. Shading denotes a Soil -to -groundwater MSCC violation or a TPH Action Limit violation. 4. "<" = less than sample detection limit. 5. Sample depths are in feet below ground level. 6. "MSCC" = Maximum Soil Contaminant Concentration. 7. "-" = Indicates compound not tested per that method. 8. "J" = The target analyte was positively identified below the quantitation limit and above the detection limit. FIGURES I - �* ep .''+ .l 5 ` - �- ti a�- �C. ___ ��, [3u'ke _ u� ••dq IIf� 14 .. City ►j• ••`� .+ .I 1gIIAVrn i_r f` - - - Vie- - __1` "�� ` • • * '�'. Nn AVS � � �� , ..._', ; ,� -� I Ili /� _ • �.r. � ff� ryr � �� 1 'iL �� _ e.■ • - .i(r _u _1 •FIELD .. Ave' •of.LNe �71S�Ye[-}�cle 4 14.9 - ._- _ i ._-: 11 �` .,• !' +�uNurr5;4723 J,b Yq'n+a+5'I 12u I `.tq (WT1 K M F+_A.4Ma7. '� iil` rFf/ -s r, .1 yAISSCi: ro _ a f... .._ �Ii 91 L 8 FRD.F - V, i Y�V f11YS1 hoR gin: ��1: d�s� E. I` 1•loswEaI-.'r.•,'� CtrI1rIIIIiWI, r r 4f'/al .— jL 34vc 1 f:Acrea1D � } ' 11lf i ` D3 Ik xNOX 1 S wine Ur 4pQsal nrar+xMr t E vuw 1�lot. C µ t Ei�hmzw _ '..y 1 CtftKE' g a LUIN Tiff w ti 0 "TRI r41 iY A., . Is 14 L MAP SOURCE: USGS 7.5 MINUTE TOPOGRAPHIC — NORTHWEST DURHAM, NO GRAPHIC SCALE 0' 2,000' 4,000' mmm U(b SITE LOCATION MAP NORTHGATE SHELL 1130 CLUB BOULEVARD DURHAM, NORTH CAROLINA QUALITY OIL COMPANY, LLC WINSTON—SALEM, NC ENVIRONMENTAL CONSULTANTS, P.C. PROJECT NO. 02693 1 DRAWN BY: ACW DATE: 7/29/20 SCALE: 1" = 2,000' 1 CHECKED BY: MJB I FIGURE NO. 1 01 1,000 I r y l i � ti ,_a ✓ �� - V� i L O i Jill 1 \ ~ �25,, +• 2285 t • � -1=.L115 - ---- --- —h W. CLUB B1-VD. H � 1 r _ •'s � I 1 � 2968 / -- _ .• 395 / jo r s _ s, F ENGL W E✓VOOD AVE. L O 01 .. Z _ r 4b I - W f- I � _ w 1 W. KNOX LEGEND 1. Location of former Exxon/Northgate Automotive Repair. This is GRAPHIC SCALE where free product detected at the site is believed to have originated. 2. Location of former Sinclair Gas Station. Currently Buiscuitville. 0' 200' 400' 800' 3. Location of former BB&T Property (DSCA 32-0013) where chlorinated solvents originated. 1" = 400' 4. Location of Northgate Mall. uest_ SITE VICINITY MAP NORTHGATE SHELL 1130 CLUB BULEVARD DURHAM, DURHAM COUNTY, NC ��-Wil QUALITY OIL COMPANY, LLC WINSTON-SALEM, NC ENVIRONMENTAL CONSULTANTS, P.C. PROJECT NO. 02693 DRAWN BY: ACW DATE: 7/29/20 SCALE: 1" = 400' CHECKED BY: MJB FIGURE NO. 2 z 0 LEGEND - LI N 0-) Q N TYPE II GROUNDWATER MONITORING WELL I \ TYPE III GROUNDWATER MONITORING WELL z 0 I � o z PROPERTY LINE - - - i z W Q 0 � Li Q — — — — — — - 1 - - - � oz Q JQO Ld W Q \ = -i m NORTHGATE MALL O m Q Om� = i J J ~ O mI � LL1 OOQ o m j z�z Y z w Q i wi zl J J = U W w MW1 0 of I N I� w I O I Q I") Na ROPERTY IJN^ O 0 ^ ST3 ElNORTHGATE AST SHELL /i T4MW I � Mwi1 J o O z �11 JLLJ CF--J W wlil MW6 zlli 'YENT uN C\\m �� MW7 ��/ MW7� O (D C U FORMER +zi - - -- T5 r I EXXON/NORTHGATEi - -I---__ / AUTOMOTIVE i ------ ri ;❑ -- 4 l (❑ MW16 MW5J A --_-___ ❑ ❑ J �s�ar� W 3 �%% Y T2 �' I MW1 ` W15 MW2 KW20� \ I� MWy // FORMER EXXON/NORTHGATE AUTOMOTIVE REPAIR GRASS - --- e❑ooucr LIB_ MW11 ECeaikrcT➢---- MW17 �� MW18' \ I,' Imo/ ❑ ❑ / m MW8 / Incident #9552 MW17A I -------- " "" I MW1 W. CLUB BLVD. UST LEGEND T1 10,000—GALLON GASOLINE ■ T2 10,000—GALLON GASOLINE T3 6,000—GALLON GASOLINE a T4 550—GALLON WASTE OIL u ai T5 550—GALLON HEATING OIL I z T6 550—GALLON HEATING OIL J AST1 250—GALLON HEATING OIL AST2 250—GALLON HEATING OIL I o AST-3 250—GALLON WASTE OIL , U j BISCUITVILLE FORMER LAIR GAS Dry FORMER BB&T PROPERTY Cleaning Solvent AST3 is still in use. a w 0 Release FSTATION N (DSCA 32-0013) LU GRAPHIC SCALE 0' 20' 40' 80, U z 0 - N LEGEND LI a-) Q N TYPE II GROUNDWATER MONITORING WELL 0 j z \ I TYPE III GROUNDWATER MONITORING WELL 00 PROPERTY LINE N --—-- - ------------------------------------------J � Lv LLJ The groundwater elevation as measured o on 7/28/20 is tabled below in feet. Q IL oz ---------------- __ ____ ____ The groundwater flow direction is o ___ indicated by the arrows placed ww< \ perpendicular to the contour lines. LLJ =—iU m NORTHGATE MALLQ LLJ LL- I � =m0 i-- - U m U C,oQ LLJ m �=z Y U = < Zi LLJ U o MW12 wl RP 0 MW10 0I Q a z LLJ o N --- 0 U AST2 O sTEl NORTHGAT SHELL ee&T MW9A Q MW11 0 LL w Q MW6 MW7A � U FORMER T5 rs MW7[ j a- U) EXXON/NORTHGATE AUTOMOTIVE T1 - -- i `✓IW14 i MW16 Mw5J - W 3 MW1 W15 W2 W20 W FORMER EXXON/NORTHGATE MW17 T MN AUTOMOTIVE REPAIR GRASS �M 8 MW17A` El El � m 8 / Incident #9552 MW1 ----------------------- -- y ------------ UST LEGEND ■ W. CLUB BLVD. T1 10,000—GALLON GASOLINE T2 10,000—GALLON GASOLINE T3 6,000—GALLON GASOLINE a T4 550—GALLON WASTE OIL u ai T5 550—GALLON HEATING OIL I z T6 550—GALLON HEATING OIL I J AST1 250—GALLON HEATING OIL AST2 250—GALLON HEATING OIL o AST-3 250—GALLON WASTE OIL , U AST3 is still in use. a FORMER BB&T w j PROPERTY BISCUITVILLE r FORMER LAIR GAS Dry Cleaning Solvent 0 Release FSTATION N (DSCA 32-0013) > LU GRAPHIC SCALE 0' 20' 40' 80, Groundwater 1�e611Q Eleva��n f�. IU1 2 89.19 f+Jl'J4� �i $ 8.11 h+1W�A 85.1}6 149V�J� 11 88.6 3 11i1Lw+15 $�9.65 Iir9V4�' 1$ $$.$� 2 z 0 LEGEND Ld J Ln Q TYPE II GROUNDWATER MONITORING WELL 0 z Do TYPE III GROUNDWATER MONITORING WELL N � � o 03 cnLLJ z N z Analytical results for the 7/28/20 sampling Q czn event are listed in ug/L. � Q Groundwater analytical results are Q �z summarized in Table 4 and the full J j� ft� analytical report is provided in Appendix D J =WQ m of the July 2020 Monitoring Report. Q U) -D 01- Q W 00 � Q O m J =_� Q �U r z m Q O 0 o °� z = Y z MAW r � W LLJ = < J U W Q Q z � N O o J O O z J W W Q J W U FORMER 1• 1 UST LEGEND ■ T1 10,000-GALLON GASOLINE T2 10,000-GALLON GASOLINE T3 6,000-GALLON GASOLINE a T4 550-GALLON WASTE OIL u ai T5 550-GALLON HEATING OIL I z T6 550-GALLON HEATING OIL I J AST1 250-GALLON HEATING OIL AST2 250-GALLON HEATING OIL o AST-3 250-GALLON WASTE OIL Piz AST3 is still in use. z w z Of GRAPHIC SCALE 0' 20' 40' 80, Ewa CaYGnivacF[mcen k � i1'c1116 ARYZ ?,YtS,d a20 91E 1�� 14-95F1 1$.7k7F1 rt9� z#i?9 1.97e! Y85.� <BS.a Y835 Y]Ol Y9S3 �839 ]:S.i 9t8 3AC5 c$8t Y£0.6 [9a3 [9�3 2�LIZJ 658 M�hS 7{ffi,dQ20 3.15 r LS: r. U7 r 1.79 1�10 9Q 6 �%2.7 �. 1.71 c 1.58 r. 157 375 r. 19T � 1.� 2.43 : 1.2& : 1�:? c 1.1K 2�5 s 197 <191 s 1� r 1.75 AEri9.4 ?,d8,d 020 157 i3.8 1�@1 17�7 55 11 r2y ? 2•C7 ]m.�S 2.1 :'.2il3 53 +117 3E9 T14 ffiaC :. 1.76 Y1.51 r. 197 �7 Si2 73tR kiwll 77iE�+0i0 5.� 1;.740 �fi� 74i� r39a 334 Y.� 7i r572 Y558 1� � <57.1 L62 1,t1313 375 r; ;rpa �5�� 7'8.5 Y7e2 1�7'sl � YA'Wli F,d8,d0�0 2; 'Y+] 15j70 ;.930 T,1® 1#d :719 r9g5 s�,4 s572 r55& �,81.1 r7E5 r57.1 77& 375 lli ]88 :5f� <78.fi s.7fi2 888 222 #iWlffi 7,'�k0i0 .:--_, •.7,:1 9T2 [F.1T 1..1�9 LR.S c90.5 [58�L a � cfifi8 Y8.11 21 [5.71 15.2 xa_13 25.i cFAi ii9 SA +1 �.i 9G r7A3 kHY� F,�S,d�i.9 �9-i9 21.3€19 �.Tfl® S1.S99 196 Top :. 2[l] � 171 �. 158 :. 157 [ 203 r 197 [ 158 � 182 6g 371 5S r 151 [ 19T r 141 1'�J *�t16 21.�n1�r4: 1 5tp 50Q � 20 :+�0 5000 70 N 7O 0.8 Tfl 23 710 5 TO :N Q_7 3 � 770 L30 �[ae ftrltieWCNm�ieards. �a0040 Si_"a40 20000 5 0000 ® �0 NAU] 1 7Lp 5 30 F00 3 30 2a MW12 MW10 ESTIMATED EXTENT OF GCL VIOLATION sT� AST � NORTHGATE SHELL T4MWgA � Mw a MW6 � MW7A� FORMER T5 Ts EXXON/NORTHGATE AUTOMOTIVE rl ❑ MW1 � MW16 � � Mw5� T2 MW 3 MW19 / W15 �MW2 MW20� MW1 / T3 MW1� EXXON/NORTHGATE GRASS MW18 � MW17 AUTOMOTIVE REPAIR MW 7��MW8 Incident #9552 MW1 W. CLUB BLVD. FORMER BB&T BISCUITVILLE/ Dry PROPERTY Cleaning Solvent FORMER SINCLAIR GAS Release STATION (DSCA 32-0013) U Z LEGEND w O N Q0) N (D TYPE II GROUNDWATER MONITORING WELL �I z TQB5TQB510 TYPE III GROUNDWATER MONITORING WELL o •OB57 z Z ABANDONED GROUNDWATER MONITORING WELL � w TOB59• Q � Q o � Q •TQB52TQB49 0ZJQO ' J>c Q =JU 0] 0gyp= O Q J LmI.-Z ckf - --- PROPERTY LINE -- - -- -- �m0 Jz � - - -------- ----------------------------- • TOB48 ---------------- ----------------------- - - -- - - Q Z cn --LJ - - --- - w Q ST3 AST2 •TQ 44 TOTAL DEPTH �� U B10 NORTHGATE SHELL T B 'T�• ;B2 of Z a TQB24 TOB25 4j3 EXCAVATION � SW6 .TO ]OFT BGL g o II •TQB47 �_ o SW 1 SW2 SW_ SW5 J TOB42 O •TOB42A 0 U TQB9 54[TTQ 11 T6 TQB 1 Q W o LJ a TOB37 5 • D a N • T •• B60 •TQB55 • B1 B9 TQB17 B11 • TOB1 B28 • B6 TQB8 TOB1 ❑• ❑• ❑• • TQB18 • TQB TQB34 TO T 'g� AREA U N E X CAVAT E D. -- -- TQB3 • - ----- •TQB50 B33 • BURIED STORM • T 14 TQB6 QB62 SEWER DRAIN TQB6 • TQB5 TQB4 • • • T 30 LINE BENEATH_ TOB36 TQB 9 • • TQB2 B3 • TQB20 TQB ❑• ❑• 2 •B5A •T 30A B2 T - 2L - ■ TOTAL�DEPT T 0 TQB • B7 EXCAVATION TQB35 B4 E •TOB31 ' ci [1 7FT BGL uI I� J U) Z 0 \\ a z GRAPHIC SCALE Lu I z 0 0' 10' 20' 40' z W. CLUB BLVD. W APPENDIX A TECHNICAL METHODS/STANDARD PROCEDURES Equipment Decontamination All soil sampling equipment utilized during site assessment activities is decontaminated according to standard and accepted protocol. Cleaning solutions range from clean potable water to acidic solutions or organic solvents depending on the contaminants present at the site. Equipment utilized at sites, such as hand augers, contaminated with petroleum hydrocarbons, is generally decontaminated with a low-sudsing detergent such as Luiquinox° and triple rinsed with distilled water. Larger equipment, such as drill rigs and associated tools, is steam cleaned. All decontamination procedures are completed within an established decontamination area which is located away from the active study area. Frequency of equipment decontamination depends on the nature of work being performed, but in no case is decontamination performed less frequently than once per test (i.e., soil boring, well installation, sample collection, etc.). Equipment blanks are collected as a quality control measure when required by job specifications. Soil Boring Installation Soil borings are completed using hand -operated sampling tools, truck -mounted drills, or Geoprobe° drilling rigs depending on the depth of sample collection and other site -specific conditions. Hand operated stainless -steel bucket augers are utilized to collect soil samples at regular intervals to determine site stratigraphy and to test for the presence of volatile organic compounds. Samples retrieved from the hand auger are necessarily disturbed during the augering process, but can provide accurate information on soil type and contaminant concentrations when properly interpreted. Soil samples from hand augered borings are generally retrieved at one to two foot intervals. Truck -mounted or Geoprobe° drilling equipment is often utilized when sample retrieval depths exceed twenty feet or subsurface conditions prevent utilization of hand augers (i.e., buried rocks, wood, bricks or other materials occur in the subsurface). Truck -mounted drilling rigs usually retrieve soil via a hollow -stem auger/split spoon collection method. Geoprobe° rigs usually employ a Macro -Core° tube retrieval system. Hollow stem augers provide relatively undisturbed 2-foot cores of soil samples. Soil samples are generally collected at five foot intervals utilizing standard penetration test procedures as defined by the American Society for Testing and Materials (ASTM) or are pushed to the desired depth using the head of the drill rig. The standard penetration test involves driving a 2" outside diameter by 1- 3/8" inside diameter split -spoon sampler a minimum distance of one foot with a 340-lb. slide hammer falling a distance of 30 inches. A Geoprobe° rig is a hydraulically -powered soil probing machine. The probe utilizes static force and percussion to advance a small diameter sampling device into the subsurface. The sampling apparatus provides relatively undisturbed 5-foot cores of soil samples. Soil samples are collected Page 1 of 8 continuously. The Macro -Core° tube contains an inserted poly -vinyl chloride (PVC) liner which retains the soil sample as the tube is driven into the ground. The Macro -Core° tube is decontaminated between each 5-foot sample interval in a soil boring using a Liquinox and tap - water mixture. A new PVC liner is used to collect soil from each sample interval in a soil boring. Soil samples retrieved from the hollow -stem augers or Geoprobe are then carefully described according to the Unified Soil Classification System. Soil descriptions are recorded on a soil boring log. Soil Sampling Soils to be analyzed by a North Carolina -certified laboratory are prepared according to the specified analytical method. Initially, soil samples are removed from the ground using either a hand auger, backhoe bucket, spilt spoon auger, or a Macro -Core° sampling tube. During the removal, care is taken to keep the disturbance of the soil structure to a minimum to reduce the loss of contaminants. Once removed, the samples are placed in the proper sample container for the specified analytical method. For samples collected for the MADEP VPH and EPA Method 8260, a TerraCore° sampler is used to collect one 5-gram allotment of soil. The allotment is placed in methanol -preserved 40 mL vials. Also, one 5-gram allotment of soil is placed into sodium bisulfate - preserved 40 mL vials (one 5-gram allotment per vial, 2 vials per sample) for the 8260 low concentration method. A 250-mL glass jar of the sampled soil is also collected to provide moisture content information. Soils sampled for MADEP EPH, EPA Method 8270 and TPH 5030 and 3550 are placed in a 250-mLglass jar (for MADEP EPH analysis an amber jar is required). TPH 5030 samples are preserved in methanol similar to the 8260 analysis. Field personnel wear new, disposable nitrile gloves during the collection of each sample. The soil samples are labeled with the sample location, sample identification, date and time of collection, and the analytical method. The samples are placed on ice, sent to a laboratory, and analyzed before the expiration of an analytical method's prescribed holding time. Chain -of -custody documentation is maintained for each sample collected in the field. If the soil is being sampled for volatile or semi -volatile compounds, a portion of the collected soil is placed in a sealable bag and screened for volatile organic vapors. Head screening procedures are described in the following paragraph. Headspace Screening Collected soil samples are routinely tested for the presence of volatile organic compounds (VOCs). After retrieval from the ground, a portion of a soil sample is placed in a sealable plastic bag. The soil samples are then set aside for approximately five minutes so that volatile constituents present in the sample can reach equilibrium concentrations with headspace gases in the bag. Once a suitable time period has passed, the probe of the sampling instrument, typically an Organic Vapor Monitor (OVM) or a Photo Ionization Detector (PID), is inserted into the bag and the relative concentration of total VOCs is measured and permanently recorded in a field note book. VOC Page 2 of 8 concentrations are measured using either a Thermo Electron Corp. In nova Series catalytic OVM or an Ion Science PhoCheck PID. Both the OVM and PID instrumentation are periodically calibrated according to the manufacturer's recommended procedures. The OVM and PID are qualitative tools employed to detect and estimate the concentration of organic or hydrocarbon vapors. A thin probe is inserted through a small break in the seal of a bagged soil sample. For the OVM, an air sample from the headspace of the bag is drawn through the probe into an internal chamber where the vapors are catalyzed. The concentration of the VOCs is registered on a digital scale in parts per million (ppm). For the PID, an air sample from the headspace of the bag is drawn across the face of a lamp causing the sample to emit photons, the presence of which are converted into a VOC ppm reading that is displayed. Oxygen levels are field calibrated prior to each use. VOC calibration occurs periodically depending upon use by using a span gas of known concentration in a process recommended by the manufacturer. Well Installation/Construction Monitoring wells are installed using hand -operated sampling tools, a truck -mounted drill rig, or a Geoprobe drilling rig depending on the depth of well and other site -specific conditions. All monitoring wells are installed according to the requirements of 15A NCAC 2C-Well Construction Standards. Specifically, individual monitoring wells are constructed of 2-inch diameter, schedule 40 PVC casing riser and screen. The screen interval is generally 10 to 15 feet of machine slotted PVC with a slot size of 0.010". Only flush threaded joints are used. The annulus space around the screen is filled with washed filter pack No. 2 sand. The filter pack extends one to two feet above the top of the screen. A one to two foot -thick bentonite pellet seal is then placed above the filter pack. The remainder of the well annulus is completely filled with a Portland (Type 1/II) cement grout mixture. A protective outer steel manhole, locking cap, and concrete pad is installed for each well. Type II Monitoring Well Construction Single -cased monitoring wells are generally used in delineation of groundwater quality within the surficial aquifer. The wells are constructed of 2-inch diameter, schedule 40 PVC casing and screen. The screen interval is generally 10 to 15 feet of machine slotted PVC with a slot size of 0.010". Only flush threaded joints are used. The annulus space around the screen is filled with washed filter pack No. 2 sand. The filter pack extends one to two feet above the top of the screen. A one to two foot -thick bentonite pellet seal is then placed above the filter pack. The remainder of the well annulus is completely filled with a Portland (Type 1/II) cement grout mixture. A protective outer steel manhole, locking cap, and concrete pad are installed for each well. Type III Monitoring Well Construction Double -cased monitoring wells are used in the delineation of groundwater quality within a deeper portion of the surficial aquifer or an additional aquifer (e.g. aquitard, bedrock). A four to six-inch outer casing is installed through the surficial aquifer until a sufficient depth or until the deeper Page 3 of 8 aquifer is encountered. The casing is secured with a Portland -grout collar that is tremmied into the annular spaced from the bottom of the bore hole to the surface. Once the grout has sufficiently cured, the bore hole is continued through the bottom of the outer casing to a depth approximately 15 - 20 feet beneath the outer casing. The inner casing is constructed of 2-inch diameter, schedule 40 PVC casing riser and screen. The screen interval is generally 5 to 10 feet of machine slotted PVC with a slot size of 0.010". Only flush threaded joints are used. The annulus space around the screen is filled with washed filter pack No. 2 sand. The filter pack extends one to two feet above the top of the screen. A one to two foot -thick bentonite pellet seal is then placed above the filter pack. The remainder of the well annulus is completely filled with the same Portland grout mixture used in the outer casing. A protective outer steel manhole, locking cap, and concrete pad are installed for each well. Well Development Following installation of each well, surging and pumping or bailing techniques will be used to remove fines from the screened interval. Groundwater is removed from each well until clear water is retrieved or a noticeable reduction in the amount of silt is achieved. Purged groundwater is disposed of in an environmentally safe manner. Groundwater Sampling Petroleum Sites Groundwater samples are collected from temporary or permanent monitoring wells according to established sampling protocol. When multiple monitoring wells or sampling points are sampled, sampling is completed beginning with the least contaminated well to the most contaminated well, if it is known. When permanent monitoring wells for petroleum sites are sampled, the well is purged of a minimum of three well -bore volumes prior to sample collection in order to assure that sampled water is representative of aquifer conditions. In temporary wells, the first water which migrates into the open borehole is sampled. Samples from both temporary and permanent monitoring wells are collected using individually wrapped disposable polyethylene bailers by field personnel wearing disposable nitrile gloves. Only one well is sampled with a given bailer in orderto prevent sample cross -contamination. During both well purging and sampling, proper protective clothing and equipment is used and is dependent upon the type and level of contaminants present. Also, field personnel change gloves between different samples to reduce the chance of cross - contamination. Water samples are transferred from the bailer to laboratory -prepared sampling containers using slow emptying devices to reduce the chance of contamination loss through volatilization. Preservatives, such as acids, are provided by the laboratory in pre -prepared containers in which collected samples are placed if in -field preservation is necessary. The samples are labeled with the project name, project number, sample identification, required analysis, and date and time of collection. The samples are placed on ice, shipped to a certified laboratory, and analyzed before the expiration of an analytical method's prescribed holdingtime. Chain -of -custody documentation is maintained for each sample collected in the field. Page 4 of 8 Other Groundwater Sampling Protocols When required by state or federal regulations, low -flow groundwater sampling procedures are instituted. Groundwater samples collected in low -flow situations are collected using a peristaltic pump. A peristaltic pump is a type of positive displacement pump. The fluid is contained within a flexible tube fitted inside a circular pump casing. A rotor with a number of rollers attached to the external circumference compresses the flexible tube. As the rotor turns, the part of tube under compression closes thus forcing the fluid to be pumped to move through the tube. Groundwater parameters such as water level drawdown, pH, conductivity, dissolved oxygen (DO) and turbidity. Pumping rate, drawdown, and the time or volume required to obtain stabilization of parameter readings can be used as a future guide to purge the well. Measurements are collected at a pre - pumping established interval (typically five to ten minutes). Once all or a majority of the parameters have stabilized forthree successive readings, stabilization has been achieved. In lieu of measuring all five parameters, a minimum subset would include pH, conductivity, and turbidity or DO. Three successive readings should be within ± 0.1 for pH, ± 3% for conductivity, and ± 10% for turbidity and DO. Upon parameter stabilization, sampling is initiated. Sampling flow rate is maintained at the estab- lished purge rate or is adjusted slightly to minimize aeration, bubble formation, turbulent filling of sample bottles, or loss of volatiles due to extended residence time in tubing. The same device used for purging is used to collect the groundwater sample. Generally, volatile parameters are sampled first. The sequence in which samples for inorganic parameters are collected is not determined unless filtered (dissolved) samples are collected. Preservatives, such as acids, are provided by the laboratory in pre -prepared containers in which collected samples are placed if in -field preservation is necessary. The samples are labeled with the project name, project number, sample identification, required analysis, and date and time of collection. The samples are placed on ice, shipped to a certified laboratory, and analyzed before the expiration of an analytical method's prescribed holding time. Chain -of -custody documentation is maintained for each sample collected in the field. During both well purging and sampling, proper protective clothing and equipment is used and is dependent upon the type and level of contaminants present. Also, field personnel change gloves between different monitoring wells or sampling points to reduce the chance of cross - contamination. When multiple monitoring wells or sampling points are sampled, sampling is completed beginning with the least contaminated well to the most contaminated well, if it is known. Stockpile Sampling The number of composite samples collected from a stockpile or a total quantity of excavated soil is based upon the cubic yardage. One composite sample is collected for every 100 cubic yards of contaminated soil excavated. The volume of a stockpile or total quantity of excavated soil is calculated by approximating the general geometry of a stockpile or estimating the capacity of the Page 5 of 8 dump trucks used for hauling. If a stockpile is sampled, a grid pattern is laid out on the stockpile, dividing the stockpile into segments of approximately 200 cubic yards. Two soil borings are advanced within a grid and three soil samples are collected from each soil boring at various depths. The six soil samples are mixed into a composite sample by a trained TerraQuest technician. If truck loads are sampled, an aliquot sample is collected from the hauling trucks at a frequency based upon the capacity of the hauling trucks. Aliquots are gently mixed into a composite sample by a trained TerraQuest technician. Every effort is made to minimize the loss of contaminants through volatilization. The composited soil samples are jarred in the appropriate laboratory -prepared containers, labeled with the sample location, sample identification, date of collection, time of collection, the analytical method, and the preservative. The samples are placed on ice, shipped to a laboratory, and analyzed before the expiration of an analytical method's prescribed holding time. Chain -of -custody documentation is maintained for each sample collected in the field. Surface Water Sampling Surface water samples, specifically samples from creeks or streams, are collected from a moving/flowing portion of the creek or stream to ensure that stagnant water is not collected. Field personnel are careful to collect samples from flowing areas that are not so turbulent as to cause a loss of volatile contaminants which might have been contained in the creek's/stream's water. Samples are collected by field personnel wearing disposable nitrile gloves. Field personnel change gloves between different locations to reduce the chance of cross -contamination. Samples are collected directly from the appropriate creek or stream location and placed into the appropriate laboratory -prepared containers. Preservatives, such as acids, are provided by the laboratory in pre - prepared containers in which collected samples are placed if in -field preservation is necessary. The samples are labeled with the project name, project number, sample identification, required analysis, and date and time of collection. The samples are cooled on ice to approximately four degrees centigrade, shipped to a certified laboratory, and analyzed before the expiration of an analytical method's prescribed holding time. Chain -of -custody documentation is maintained for each sample collected in the field. Potable Well Sampling Groundwater samples from potable wells are collected from sampling points, typically spigots, located in the closest proximity to the potable well pump house as possible. Prior to sample collection, the water is run for a sufficient amount of time to purge the bladder tank and assure that sampled water is representative of aquifer conditions. Once purged, the flow rate is reduced and samples are placed in the appropriate laboratory prepared containers with the appropriate acid preservatives added if preservation of the sample is necessary. The samples are labeled with the project name, project number, sample identification, required analysis, and date and time of collection. The samples are placed on ice, shipped to a laboratory, and analyzed before the expiration of an analytical method's prescribed holding time. Chain -of -custody documentation is maintained for each sample collected in the field. Page 6 of 8 Public Water Supply Line Sampling Groundwater samples from public water supply lines are collected from sampling points, typically spigots. To sample the spigot, the flow rate is reduced and samples are placed in the appropriate laboratory prepared containers. The samples are labeled with the sample location, sample identification, date of collection, time of collection, and required analytical method. The samples are placed on ice, shipped to a laboratory, and analyzed before the expiration of an analytical method's prescribed holding time. Chain -of -custody documentation is maintained for each sample collected in the field. Air Sampling Air samples are collected with the aide of a manually operated MityVac° pump manufactured by Pristech, Inc. The air sampling process begins by connecting a length of rubber hose from the MityVac° pump to the port to be sampled, or by hanging the hose inside of an emissions stack in such a manner as to ensure no outside air causes dilution. Another length of hose is fixed to the outlet port of the pump and is connected to a new Tedlar bag. Once the pump is hooked up, a valve on the Tedlar collection bag is opened and air is manually forced into the bag by the pumping action of sampling personnel. Field Measurements Field measurements taken to determine the pH, conductivity, temperature, and dissolved oxygen concentration of a particular groundwater sample are taken directly after a particular monitoring well has been adequately purged. This ensures that the groundwater parameter data collected is representative of the aquifer conditions at a given location. Once purging of the monitoring well is complete, the decontaminated probe head and cord of the appropriate unit is lowered into the required monitoring well. If the depth to water in a specific monitoring well is greater than the length of cord for a particular unit, a new, disposable bailer is slowly lowered into the appropriate monitoring well and a representative groundwater sample is retrieved. A slow pouring device is fitted onto the end of the disposable bailer and the sample is slowly poured into a new, disposable plastic cup. Groundwater parameter data are then collected from the groundwater in the cup using the required unit. For pH, conductivity, and temperature, a Hanna Instruments Model 991300 portable meter is utilized. This unit is periodically calibrated and maintained in accordance with the unit's operations manual by field personnel. Prior to data collection, the unit is properly decontaminated to prevent cross -contamination. The unit is decontaminated between each sample. The procedure used for sample measurement involves lowering the meter's probe into the new, disposable cup containing the groundwater sample to be measured and slowly stirring the probe to force groundwater across the probe's membrane. The measurements displayed by the meter are then recorded. For dissolved oxygen concentration measurements, a YSI° Model 55 Handheld Dissolved Oxygen System is utilized. This unit is periodically calibrated and maintained in accordance with the unit's Page 7 of 8 operations manual by field personnel. Prior to data collection, the unit is properly decontaminated to prevent cross -contamination. The unit is decontaminated between each sample. The procedure used for sample measurement involves adjusting the unit for the correct altitude where the sampling will take place and adjusting the reported units desired. Once this is done, the unit's probe is inserted into the groundwater sample to be measured and the probe is slowly stirred to force the groundwater across the probe's membrane. The measurements displayed by the unit are then recorded. For turbidity measurements, a Hach 2100P Portable Turbidity meter or equal equivalent is utilized. The unit is calibrated prior to use in accordance with the unit's operations manual by field personnel. Groundwater samples are collected in glass containers for measurement by the instrument. The glass containers are washed with bottled -water between each measurement collection. Once the sample is collected and inserted into the instrument, the measurements displayed by the instrument are then recorded. Page 8 of 8 APPENDIX B CHRONOLOGICAL SITE HISTORY NORTHGATE SHELL NCDWM-UST Incident No. 15968 1981— 1998 The Northgate Shell facility was operated by Quality Oil Company, LLC (Quality) as a retail fuel station and automotive repair shop. Quality leased the property from Helen Miller who is the grandmother of the owners of Planters Oil. Upon her death, the property transferred to her son whom is the father of the current owners of Planters Oil. 1994 In January 1994, free product was discovered in a monitoring well located to the north of the Northgate Shell facility that was installed to investigate potential groundwater contamination in the vicinity of the Northgate Mall. Due to the detected contamination, the NCDEM targeted the Northgate Shell facility as the source of the release. After being notified of the suspected release, Quality immediately tested the system through tank and line tightness test, and line leak -detector tests. Quality also contracted Turner Environmental Consultants. P.C. (TEC) to conduct environmental assessment activities. Information regarding assessment activities conducted by TEC along with UST system test results are provided in the Site Check and Initial Site Characterization Report submitted by TEC in December 1994. The report also details several offsite sources of contamination including the former Exxon/Northgate Automotive station located on the adjacent property to the west of the former Northgate Shell facility (Incident No. 9552). 1998 — 2009 In 1998, Quality sold the UST system/business to Planters Oil who continued to operate the UST system until 2009 when the system was placed into temporary closure. 2009 In an NORR dated March 9, 2009, the NCDWM-UST required Quality to conduct a free product investigation at the site. On June 9, 2009, Terraquest personnel gauged monitoring wells MW1, MW6, and MW7 for the presence of free product. No free product was detected during the free product investigation. Additional information regarding the free product evaluation is provided in the Free Product Evaluation Report submitted by Terraquest on July 20, 2009. No additional work was requested by the NCDWM-UST at this time. Terraquest Environmental Consultants, P.C. �� luest 100 E Ruffin St, Mebane, NC 27302 (919) 563-9091 Page 1 of 4 ENVI RON M FNTRL CO N SULTRNTS P.C. 2010 In an NORR dated September 2, 2010, the NCDWM-UST required quality to perform soil sampling results similar to a site check and the collection of groundwater samples from the three onsite monitoring wells. Analytical results for the collected soil samples confirmed the presence of contaminants along the product lines and at the dispensers and USTs. Analytical results for the collected groundwater samples revealed petroleum -type contaminants at concentration in excess of the 2L Standards in all of the sampled monitoring wells. Non -petroleum contaminants were also detected in monitoring wells MW1 and MW6. The presence of these contaminants is believed to be from a former dry-cleaning facility (Former BB&T Property DSCA 32-0013) located southeast across W. Club Boulevard. 2011 Based upon the analytical result of the 2010 soil and groundwater sampling events, the NCDWM-UST issued an NORR on February 17, 2011. The NORR requested the completion of a Comprehensive Site Assessment. 2012 As part of CSA activities, Terraquest personnel supervised the advancement of thirty-eight (38) soil borings (TQB23 — TQB61) and the installation of monitoring well MW8 — MW19 to define the extent of soil and groundwater contamination associated with the release. 2013 Based upon the results of the CSA, the NCDWM-UST issued an NORR on November 5, 2012. The NORR requested the completion of a Corrective Action Plan. On August 27, 2013, Terraquest personnel submitted a CAP that identified excavation and monitored natural attenuation assisted by free product skimmers as the most cost-effective method of remediating soil and groundwater. The CAP was approved in an NORR dated November 4, 2013. On July 16, 2013Terraquest personnel collected free product measurements from monitoring wells MW2 and MW11. The product thickness in monitoring wells MW2 and MW11 were gauged at 0.16 feet and 0.08 feet, respectively. Product was had bailed from each monitoring well using a new disposable bailer. Approximately one gallon of free product was removed from monitoring well MW2 and half of a gallon of free product was removed from monitoring well MW11. At the conclusion of product recovery efforts, no product was measured in either well. 2014 On June 3, 2014, Terraquest personnel supervised the advancement of seven soil boring to better delineate the horizontal and vertical limits of the soil excavation. Prior to conducting excavation activities, monitoring wells Terraquest Environmental Consultants, P.C. �� luest 100 E Ruffin St, Mebane, NC 27302 (919) 563-9091 Page 2 of 4 EN VI RON M ENTAL CO N SULTANTSFP.C. MW7, MW9, MW13, MW14, and MW17 were abandoned on June 3, 2015. On July 28, 2014, Terraquest personnel supervised the removal of USTs (T1 - T3, T5 and T6). After discussion with Mark Powers of the NCDWM-UST, it was decided that UST closure soil samples were unnecessary. July 29 through August 5, 2014, Terraquest personnel supervised the excavation of contamination soils in the area of the former UST system. A total of 3,823.24 tons of contaminated soil was excavated from the Northgate Shell facility and disposed of at the Earthtec of NC, Inc. soil disposal facility in Sanford, NC. 2015 April 2015, Terraquest personnel supervised the reinstallation of select monitoring wells that were abandoned prior to conducting excavation activities. Monitoring weIIsMW7A and MW9A were installed on April 7, 2015. Monitoring wells MW13A and MW17A were installed on April 21, 2015. Terraquest personnel also supervised the installation of monitoring well MW20 on April 21, 2015. Monitoring well MW20 was installed to further define the extent of free product. Per the NCDWM-UST approved CAP, Terraquest personnel installed passive free product recovery bailers in monitoring wells MW2 and MW11 on April 30, 2015. Terraquest personnel visited the site on several occasions to service the skimmers and to hand bail free product (if present) from the monitoring wells. On June 30, 2015, Terraquest personnel collected groundwater samples from the entire monitoring well network. Due to a heavy sheen of free product, samples were not collected from monitoring wells MW2 or MW11. On December 1, 2015, Terraquest personnel collected groundwater samples from the entire monitoring well network. Due to the presence of free product, a sample was not collected from monitoring well MW20. 2016 On June 2, 2016, Terraquest sampled monitoring wells MW1, 2, 6, 7A, 8, 9A, 10, 11, 12, 13A, 15, 16, 17A, 18, 19, and BB&T MW11. Monitoring well MW20 contained free product and was not sampled. 2017 On January 10, 2017, Terraquest sampled monitoring wells MW1, 2, 6, 7A, 8, 9A, 10, 13A, 15, 17A, 18, 19, 20, and BB&T MW11. Monitoring well MW11 contained free product and was not sampled. Terraquest Environmental Consultants, P.C. �� luest 100 E Ruffin St, Mebane, NC 27302 (919) 563-9091 aa�lllll> � Page 3 of 4 EHVI RON M FHTRL CO R SULTANTS P.C. On August 9, 2017, Terraquest sampled monitoring wells MW2, 6, 9A, 11, 15, and 18. Monitoring well MW20 contained free product and was not sampled. 2018 On February 27, 2018, Terraquest sampled monitoring wells MW2, 6, 9A, 15, and 18. Monitoring wells MW11 and MW20 contained free product and was not sampled. On July 19, 2018, Terraquest sampled monitoring wells MW2, 6, 9A, 11, 15, 18, and 20. No product was detected. 2019 On January 3, 2019, Terraquest sampled monitoring wells MW2, MW6, MW9A, MW11, MW15, MW18, and MW20. No product was detected. On August 16, 2019, Terraquest sampled monitoring wells MW2, MW6, MW9A, MW11, MW15, MW18, and MW20. No product was detected. 2020 On January 8, 2020, Terraquest sampled monitoring wells MW2, MW6, MW9A, MW11, MW15, MW18, and MW20. No product was detected. On July 28, 2020, Terraquest sampled monitoring wells MW2, MW6, MW9A, MW11, MW15, MW18, and MW20. No product was detected. Terraquest Environmental Consultants, P.C. uest 100 E Ruffin St, Mebane, NC 27302 (919) 563-9091�� Page 4 of 4 ENVIRONMENTAL CONSULTRT7TS,P�. APPENDIX C GROUNDWATER ELEVATION DATA HISTORY Incident Name: Northgate Shell Incident No. 15968 12/15/2010 12/12/2011 3/19/2012 6/21/2013 7/16/2013 12/23/2014 Casing Depth to Product Water Depth to Product Water Depth to Product Water Depth to Product Water Depth to Product Water Depth to Product Water Well Elevation Water Thickness Elevation Water Thickness Elevation Water Thickness Elevation Water Thickness Elevation Water Thickness Elevation Water Thickness Elevation M W 1 100 16.81 81.71 18.48 81.52 18.23 81.77 16.39 83.61 - - - - MW2 100.24 15.78 0.42 83.30 17.43 0.63 83.27 16.80 0.37 83.71 14.97 0.17 85.39 14.12 0.16 86.24 14.58 0.04 85.69 MW6 100.05 16.02 82.56 17.41 82.64 16.85 83.20 15.05 85.00 - - - - MW7 98.84 18.81 78.55 20.65 78.19 20.60 78.24 18.94 79.90 MW8 99.49 - - 20.43 79.06 20.36 79.13 18.73 80.76 MW9 99.31 21.37 77.94 21.30 78.01 19.61 79.70 MW10 96.87 19.38 77.49 19.33 77.54 17.68 79.19 - - - - MW11 99.53 16.59 82.94 16.56 0.41 83.27 14.59 0.24 85.12 13.81 0.08 85.78 14.31 0.03 85.24 MW12 97.14 16.46 80.68 16.07 81.07 14.17 82.97 - - - - M W 13 100.08 20.98 0.02 79.11 20.96 79.12 19.29 80.79 M W 14 99.74 20.82 78.92 21.00 78.74 19.92 79.82 MW15 100.65 - - 16.30 84.35 14.50 86.15 MW16 102.31 17.40 84.91 15.41 86.90 M W 17 100.23 19.71 80.52 17.95 82.28 M W 18 99.77 16.70 83.07 15.02 84.75 MW19 99.28 20.63 78.65 19.00 80.28 BB&TMW11 97.66 - - 19.08 78.58 6/30/2015 12/1/2015 6/2/2016 1/10/2017 8/9/2017 3/20/2018 Casing Depth to Product Water Depth to Product Water Depth to Product Water Depth to Product Water Depth to Product Water Depth to Product Water Well Elevation Water Thickness Elevation Water Thickness Elevation Water Thickness Elevation Water Thickness Elevation Water Thickness Elevation Water Thickness Elevation MW1 100.00 12.57 87.43 15.47 84.53 12.90 87.10 14.30 85.70 - - - - - MW2 100.24 13.18 sheen 87.06 14.00 sheen 86.24 11.64 0 88.60 13.16 0 87.08 13.23 0 87.01 15.32 0 84.92 MW6 100.05 13.79 86.26 14.52 85.53 12.3 87.75 13.84 86.21 13.85 86.20 15.9 0 84.15 MW7A 99.18 16.62 82.56 17.61 81.57 14.92 84.26 16.15 83.03 - - - - - MW8 99.49 16.00 83.49 17.00 82.49 14.30 85.19 15.58 83.91 - - - - - MW9A 99.46 17.74 81.72 18.35 81.11 16.05 83.41 16.68 82.78 16.70 82.76 19.51 0 79.95 MW10 96.87 15.12 81.75 16.00 80.87 13.37 83.50 14.62 82.25 - - - - - MW11 99.53 12.77 sheen 86.76 13.74 sheen 85.79 11.30 0 88.23 12.62 0.11 86.99 12.83 0 86.70 15.16 0.1 84.44 MW12 97.14 12.81 84.33 13.50 83.64 11.12 86.02 - - - - - - - MW13A 99.85 16.01 83.84 17.08 82.77 14.42 85.43 15.75 84.10 - - - - - MW15 100.65 12.85 87.80 13.66 86.99 11.29 89.36 12.93 87.72 13.03 87.62 15.2 0 85.45 MW16 102.31 14.28 88.03 14.72 87.59 12.35 89.96 - - - - - - - MW17A 100.04 15.25 84.79 16.25 83.79 13.59 86.45 14.98 85.06 - - - - - MW18 99.77 13.64 86.13 14.30 85.47 12.05 87.72 12.96 86.81 13.28 86.49 15.61 0 84.16 MW19 99.28 16.32 82.96 17.28 82.00 14.64 84.64 15.80 83.48 - - - - - MW20 99.36 12.63 86.73 13.57 85.87 11.13 0.22 88.39 12.58 0 86.78 12.64 0.05 86.76 15.05 0.23 84.48 BB&TMW11 97.66 16.78 80.88 17.88 79.78 15.07 82.59 16.22 81.44 - - - - - 7/19/2018 1/3/2019 8/14/2019 1/8/2020 7/28/2020 Casing Depth to Product Water Depth to Product Water Depth to Product Water Depth to Product Water Depth to Product Water Depth to Product Water Well Elevation Water Thickness Elevation Water Thickness Elevation Water Thickness Elevation Water Thickness Elevation Water Thickness Elevation Water Thickness Elevation MW1 100.00 - - - - - - - - - - - - - - - MW2 100.24 13.70 0.00 71.22 11.70 0.00 88.54 10.55 0 89.69 12.46 0 87.78 11.05 0 89.19 MW6 100.05 14.28 0.00 69.87 12.45 0.00 87.60 11.34 0 88.71 13.17 0 86.88 11.94 0 88.11 MW7A 99.18 - - - - - - - - - - - - - - - MW8 99.49 - - - - - - - - - - - - - - - MW9A 99.46 17.70 0.00 62.25 16.95 0.00 82.51 14.00 0.00 85.46 16.17 0 83.29 14.40 0.00 85.06 MW10 96.87 - - - - - - - - - - - - - - - MW11 99.53 13.35 0.00 71.09 11.81 0.00 87.72 10.10 0 89.43 12.33 0 87.20 10.9 0 88.63 MW12 97.14 - - - - - - - - - - - - - - - MW13A 99.85 - - - - - - - - - - - - - - - MW15 100.65 13.57 0.00 71.88 11.35 0.00 89.30 10.42 0.00 90.23 11.31 0 89.34 11 0 89.65 MW16 102.31 - - - - - - - - - - - - - - - M W 17A 100.04 - - - - - - - - - - - - - - - MW18 99.77 13.70 0.00 70.46 12.00 0.00 87.77 10.45 0.00 89.32 12.54 0 87.23 10.95 0 88.82 MW19 99.28 - - - - - - - - - - - - - - - MW20 99.36 13.12 0.00 71.36 12.14 0.00 87.22 9.94 0.00 89.42 12.1 0 87.26 11.26 0 88.10 BB&TMW11 97.66 1 - - - - - - - - - - - Notes: 1. All data in feet relative to an arbitrary datum plane of 100 feet. 2. Casing elevation = well elevation as measured from top of casing 3. Monitoring wells MW7, 9, 13, 14, and 17 were abandoned prior to the July 2014 excavation and replaced thereafter. HISTORICAL SUMMARY OF GROUNDWATER SAMPLING RESULTS Incident Name: Northgate Shell Incident No.: 15968 Q z a LU a LU m = _ _ _ M:N a > a > a > a > a- > m m m c0 m m m m m m m m c0 m m c0 c0 m m m m m m c0 c0 c0 c0 m m c0 m m m Q z Q z a W a W a W a W a W U co 0 O 0 o 0 o 0 O 0 o 0 0 0 0 0 0 0 0 0 0 0 o 0 O 0 o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 O 0 0 0 0 0 O 0 o 0 0 0 0 0 O 0 0 0 0 0 O 0 0 0 O m m p 0 O = 0 0 Analytical Method N N cV N N N N N N N N N N N N N N N N N N N N N N N (N N N N N N N Ln N in N Q 2 Q 2i Q 2 d Q 2 Q 2 rn O O O kD lD QD �.D lD �.D W W W W W W W W W W W W W W lD W lD W W W W W W W W W W W W W cn ,n Contaminant of Concern v C v C v -C v C w U a- W v � a) C a) a) a) C:C C +� 1"i O O U t N C N C ". C2 N Ln V) N LnU N 0 O a1 7 C O C Q) a1 O W N T co U 'In U 'U --� aru Y c0 a) C V) a) v N N C N C N a) a--. v 0 ++ N 0 v O O U N C O a, CL U N a) a) v -0 O L +-+ L +� C x ru la M -C M -C t C2 f6 E: E O N v v s C O O u N v 0 O E: E ) v T t Q a Q Q < 0 Q 4! a) 0 >, i s ° 0 N T O 0 >- C a) �. ° O U .� .� O v a Q Q Q �0 Q N ' v X W �, a� cD 0 U U �_ [V c-I Q �, � CZ U O U 1- H H fa +1 O C O O O c a) j. W 00 N rn U O N U >_ Date N 7 > m 7 m U ++ O 0 0 0 `1 ,n Q 0 N cc t ++ L Q- O i n3 i t N i11 0 +� E: n3 N +� U U U U -O O a) O L +, a� O 2 W CD c a1 L a) t ci N N O G a) f6 d � �, �, }' N .0 i C rl N fn co L U O i t +, v7 a) o I f) Ol Ql ci Ql rl O s 0 Well ID Collected m � W � ,� U -i r; ,� z �„ > N U Q m W m U U U U U U U w MW1 12/12/11 <1 <5 <1 <3 150 25 <1 3.9 < < <1 <1 <1 35 1.4 <1 <1 < < <5/- <1 <1 190 61 1.3 <1 <1 < < < < < - - 690 <100 - <100 - <5 - - 3/19/12 - - - - - - - - - - - - - - - - - - - -/- - - - - - - - - - - - - < - - - - - - - - - - <0.010 6/21/13 2.24 0.680 0.370 1.25 53.8 144 2.80 6.05 0.37 <0.105 <0.104 2.47 < 20.8 0.680 6.96 <0.0890 <0.253 <0.190 0.56 0.43 <0.0740 0.23 7.51 0.670 <0.113 <0.103 <0.0870 < < < < < - - - - - - - - - - - 6/30/15 <0.119 <0.0570 <0.0920 <0.298 538 7.91 <0.0600 2.81 <0.0890 <0.172 <0.104 < < 37.9 <0.188 <0.0980 <0.0890 < < <0.0940 <0.0650 <0.0740 287 81.1 <0.0810 < <0.103 <0.0870 <0.378 < < < < - - - - - - - - - - - 12/1/15 <0.119 <0.0570 <0.0920 <0.298 459 <0.0920 <0.0600 3.85 <0.0890 < < <0.0900 <0.180 13.1 <0.188 <0.0980 <0.0890 < <0.190 <0.0940 <0.0650 <0.0740 388 62.1 < < <0.103 <0.0870 < <0.172 < < < - - - - - - - - - - - 6/2/16 <0.595 3.85 <0.460 <1.49 532 6.3 <0.300 <0.460 <0.445 <0.595 <0.520 <0.450 <0.900 56.4 <0.940 <0.490 <0.445 <1.26 <0.950 <0.325 <0.370 291 49.6 <0.405 <0.565 <0.345 <0.435 <1.89 <0.860 < < < - - - - - - - - - - - 1/10/17 <0.595 <0.285 <0.460 <0.900 93 1.6 <0.300 <0.460 <0.445 < <0.520 <0.450 < 40 3.5 <0.490 <0.445 < 24.6 <0.470 <0.325 <0.370 181 58.2 <0.405 <0.515 <0.435 <0.860 <1.76 1.1 < - - - - - - - - - - - M W 2 12/ 15/ 10 FREE PRODUCT 0.42' 11/2/11 FREE PRODUCT 0.43' 12/12/11 FREE PRODUCT 0.63' 3/9/12 FREE PRODUCT 0.37' 6/21/13 FREE PRODUCT 0.17' 7/16/13 FREE PRODUCT 0.16' 12/23/14 FREE PRODUCT: 0.04' 4/30/15 FREE PRODUCT. SHEEN 5/8/15 FREE PRODUCT. SHEEN 5/15/15 FREE PRODUCT. SHEEN 5/22/15 FREE PRODUCT. SHEEN 5/29/15 FREE PRODUCT. SHEEN 6/5/15 FREE PRODUCT. SHEEN 6/30/15 FREE PRODUCT. SHEEN 7/7/15 FREE PRODUCT. SHEEN 12/1/15 15,900 30,400 3,790 19,670 <8.45 347 52.5 <4.60 <4.45 < < <4.50 <5.70 <9.40 <4.45 < <9.50 1,260 390 751 59 <6.95 < < 2,580 638 < <8.60 < < < - - - - - - - - - - - 6/2/16 18,500 29,900 3,260 14,770 <84.5 480 <30 <46 <44.5 <52.5 <60.5 <45 <90 <57 <94 <49 <44.5 <126 1,210 2,520 <32.5 665 <27 <69.5 <40.5 <56.5 1,920 525 <189 <86 < < < - - - - - - - - - - - 1/10/17 15,100 25,400 3,760 17,300 <84.5 575 <30.0 <46.0 <44.5 <52.0 <45.0 � <94.0 125 <44.5 < <95.0 435 310 875 <27.0 <40.5 - 2,080 505 - <86.0 1,280 <48.5 < - - - - - - - - - - - 8/9/17 7,010 17,500 3,070 14,400 <67.6 248 <24.0 <35.6 <36.0 <45.6 <75.2 224 <35.6 1,150 264 808 84 < < 1,860 472 < < <141 < 40,800 - - - - - - - - - - - 2/27/18 9,050 19,700 3,430 15,800 <33.8 260 < < <17.8 < < <18.0 < <22.8 < 106 <17.8 < < 798 310 684 76 < < 2,570 626 < < <70.4 < <600 - - - - - - - - - - - 7/19/18 8,390 18,500 2,520 11,070 < 42.3 < 23.0 < < 23.0 < < < < 22.5 < < 28.5 < < 24.5 < 22.3 < < 995 223 670 < 13.5 < 34.8 < < 1,840 453 < < < < < - - - - - - - - - - 1/3/2019 109 387 23.1 248 < 0.845 6.95 < 0.300 < 0.460 < < < < 0.450 < < 0.570 < < 0.490 < 0.445 < < < 0.470 < 0.325 10.6 4 3.45 < < 20.6 10.9 < < < < < - - - - - - - - - - 8/14/19 11,200 23,600 3,260 14,530 44.2 358 < 0.0600 9.58 < 0.339 < < < 0.0900 57.2 39.5 2.68 109 6.35 < 0.253 < 1,140 280 836 56.5 86.4 < < < 0.103 499 < < < 0.352 < < - - - - - - - - - - 1/8/2020 5,220 18,400 3,260 15,240 < 67.6 332 < 24.0 < 36.8 < 136 < < < 36.0 < < 45.6 < 75.2 < 39.2 < 35.6 < 101 < 76.0 1,380 288 944 < 21.6 < < 32.4 < 2,240 560 < < 1,960 < < - - - - - - - - - - 7/28/2020 918 13,800 3,960 18,760 < 49.4 < 89.9 < 85.5 < 84.0 < 83.5 < < < 101 < < 98.3 < 153 < 83.9 < < 905 405 < 88.2 < 80.6 < 98.3 < 95.3 < 2,800 668 < < 1,570 < < < - - - - - - - - - MW6 12/12/11 170 38 48 45.4 <1 580 2.2 3.6 < < 1.1 11 <1 9.5 1.6 28 <1 < < 16/- 7.4 26 2.6 12 <1 < <1 1.3 < < < < < - - 2,700 - 320 - 110 - <5 - - 3/19/12 - - - - - - - - < < - - - - - - - < < -/20 - - - - - < - - < < < < < - <1 - - - - - - - - <0.010 6/21/13 6.62 1.36 1.30 0.73 <0.190 30.2 1.1 1.65 <0.0890 <0.105 <0.121 <0.0900 < 1.37 0.370 J 11.9 <0.0890 <0.253 <0.190 0.85 2.07 0.990 <0.0540 <0.0540 <0.0810 <0.113 0.330 J <0.0870 < < < < < - - - - - - - - - - 6/30/15 25.1 2.15 6.58 <0.298 <0.169 125 1.75 3.11 <0.0890 <0.172 <0.104 < < 1.57 <0.188 21.5 <0.0890 < < 1.37 2.7 <0.0740 <0.0540 <0.139 <0.0810 < <0.103 <0.0870 <0.378 < < < < - - - - - - - - - - - 12/1/15 48.9 5.05 17.8 5.22 <0.169 107 <0.0600 3.07 0.19 < < 1.84 <0.180 1.71 <0.188 23.7 0.71 < <0.190 3.41 5.76 <0.0740 <0.0540 6.96 < < 0.210 J 0.390 J < <0.172 < < < - - - - - - - - - - 6/2/16 11.6 1.21 2.39 0.542 <0.169 136 1 2.29 <0.0890 <0.105 <0.121 1.95 <0.180 1.21 <0.188 12.9 <0.0890 <0.253 <0.190 0.73 1.27 <0.0740 <0.0540 4.37 <0.0810 <0.113 <0.103 <0.0870 <0.378 <0.172 < < < - - - - - - - - - - - 1/10/17 29.4 2.4 5.66 1.06 29.8 198 2.06 <0.184 <0.178 < 0.62 4.22 < 18.9 1.26 24.3 <0.178 < <0.380 <0.188 2.3 1.26 12.4 14.1 <0.162 < <0.206 <0.174 < <0.344 <0.704 <0.194 < - - - - - - - - - - - 8/9/17 15.6 1.31 3.64 0.41 111 218 2.39 < 0.95 < < < 5.31 33.4 1.23 13.1 <0.0890 < < <0.0940 1.37 0.97 22.3 19.7 < < <0.103 <0.0870 < < <0.352 < < - - - - - - - - - - - 2/27/18 53.4 2.95 17.5 5.25 70.2 163 < < <0.445 < < 3.95 < 18.5 < 8.75 <0.445 < < 14.3 3.3 <0.370 7.05 8.65 < < 1.7 0.75 < < 9.3 < <15.0 - - - - - - - - - - - 7/19/18 15.3 < 0.285 3.8 < 0.61 77.2 121 < < 0.460 < < < 3.6 < 13.3 < 12.1 < 0.445 < < < 0.470 < 0.325 < 0.370 8.95 6.9 < < < 0.515 < 0.435 < < < < < - - - - - - - - - - - 1/3/2019 15 1.28 4.46 < 0.122 163 116 2.52 2.51 < < < 2.7 < 21 < 13.4 < 0.0890 < < < 0.0940 1.72 1.23 13.1 11.2 < < < 0.103 < 0.0870 < < < < < - - - - - - - - - - - 8/14/19 8.92 3.7 4.52 27.1 798 101 < 0.0600 2.76 < 0.339 < < 4.59 < 0.180 7.37 < 0.188 6.89 0.89 < 0.253 < 5.45 1.58 3.85 2.54 < < 51.4 12.9 < < < 0.352 < < - - - - - - - - - - - 1/8/2020 2.08 0.61 0.61 0.58 198 22 < 0.0600 < 0.0920 < 0.339 < < 0.67 < 0.6 < 0.188 0.9 < 0.0890 < 0.253 < 0.190 < 0.0940 < 0.0650 < 0.0740 0.73 < < 0.0810 < < 0.103 < 0.0870 < < < 0.352 < < - - - - - - - - - - - 7/28/2020 3.15 < 1.83 < 1.77 < 1.79 1,210 50.6 < 1.71 < 1.68 < 1.67 < < 3.75 < < 1.97 < 2.45 < 1.68 < < < 1.28 < 1.53 < 1.76 2.6 < 1.97 < 1.91 < < 1.68 < 1.76 < < < 22.7 < < < - - - - - - - - - MW7A 12/12/11 700 340 2,400 2,690 <20 <20 50 23 < < <20 <20 <20 180 <20 200 23 510/3 460 <20 <20 <20 130 < 1,500 380 < < < < < 2.1 8 11,000 9,600 - <100 3,520 54 17 - 3/19/12 - - - - - - - - < < - - - - - - - < < -/- - - - - - < - - < < < < < - - - - - - - - - <0.010 6/21/13 606 227 1,930 1,741 51.9 2.24 <0.0600 26.1 <0.0890 <0.105 <0.121 <0.0900 < 106 <0.188 199 18.5 24.9 <0.190 455 461 2.16 0.51 <0.139 46.2 <0.113 1,130 364 < < < < < - - - - - - - - - 6/30/15 337 582 2,170 4,040 68.8 <1.84 90.8 29 <1.78 <3.44 <2.42 < < 178 <3.76 153 18.8 < < 861 416 <1.48 <1.08 <2.78 <1.62 < 1,940 468 <7.56 < < < < - - - - - - - - - 12/1/15 669 2,430 3,590 6,580 129 <1.84 66.8 22.4 46.8 < < <1.80 <3.60 216 <3.76 187 <1.78 < <3.80 902 477 <1.48 <1.08 <2.78 < < 2,340 570 < <3.44 < < < - - - - - - - - - - 6/2/16 504 762 2,100 4,210 63.5 <4.60 <3 <4.60 <4.45 <5.25 <5.20 <4.50 <9 98 <9.40 122 11 <12.6 <9.50 586 306 <3.70 <2.70 <6.95 <4.05 <5.65 1,570 406 <18.9 <8.60 < < < - - - - - - - - - - - 1/10/17 400 955 2,300 4,190 64.2 <2.30 <1.50 <2.30 <2.22 <2.60 <2.25 88 <4.70 150 9.75 <4.75 550 328 23 <1.35 <3.48 <2.02 1,580 372 <4.30 <8.80 <2.42 < MW8 12/12/11 68 <250 690 600 1,400 <50 <50 <50 < < <50 <50 <50 2,900 <50 310 <50 < < 380 610 <50 <50 <50 <50 < 1,500 360 < < < < < - - 11,000 7,300 3,900 - 8.5 - <0.010 6/21/13 125 13 852 349.5 440 <4.60 <3 <4.60 <4.45 <2.10 <5.20 <4.50 < 2,160 12.5 307 30.5 <12.7 <9.50 605 624 14.5 J <2.70 <6.95 <4.05 <5.65 269 82 < < < < < - - - - - - - - - 6/30/15 105 11.7 504 341 191 4.8 68.3 34.3 4.3 <0.860 5.1 < < 1,250 13.7 290 37.4 < < 761 396 14.1 11.5 13.4 46.1 125 55.5 <1.89 < < < < - - - - - - - 12/1/15 1,710 163 682 718 2,090 <4.60 739 376 <4.45 < < <4.50 <9 1,420 <9.40 3,810 415 < <9.50 1,050 520 233 <2.70 <6.95 < < 1,170 511 < 82 < < < - - - - - - - 6/2/16 38 2.66 127 92.01 45 <0.0920 8.67 4.52 0.76 <0.105 <0.121 <0.0900 <0.180 568 <0.188 41.2 6.08 <0.253 <0.190 162 68.8 3.85 2.23 6.85 <0.0810 <0.113 23 10.7 <0.378 <0.172 < < < - - - - - - - 1/10/17 56.1 5.6 311 139 161 2.4 16.4 10.1 1.7 3.8 <0.900 920 8.8 15 54.8 408 210 10 <0.540 <1.39 62.3 16.8 <0.870 <1.72 <3.52 <0.970 < - - - - - - - - - - MW9 12/12/11 11,000 330 2,800 10,000 1,600 310 140 <100 < < <100 <100 <100 130 <100 <100 < < 700/520 290 <100 <100 <100 <100 < 2,000 530 < < < < < <1 <1 31,000 16,170 - <100 5,560 200 <10 24 6/21/13 3,060 1,040 1,190 3,920 190 54 <6 <9.20 <8.90 <4.20 <12.1 <9 < 40 <18.8 65 <8.90 <25.3 <19 371 168 <7.40 <5.40 <13.9 <8.10 <11.3 901 227 < < < < < - - - - - - - - - - MW9A 6/30/15 625 330 1,030 3,350 553 32.5 <0.600 20.1 2.10 J <1.72 <1.04 < < 22.5 <1.88 142 17 < < 431 357 <0.740 22.6 <1.39 <0.810 < 1,600 615 <3.78 < < < < - - - - - - - - 12/1/15 943 334 779 2,400 560 56.5 64.4 17.7 <0.890 < < <0.900 <1.80 51.7 <1.88 115 18 < <1.90 422 279 <0.740 <0.540 <1.39 < < 1,250 422 < 13.8 < < < - - - - - - - - 6/2/16 1,930 381 592 1,763 819 96.6 <1.20 <1.84 <1.78 <2.10 <2.08 <1.80 <3.60 220 <3.76 85.6 15.6 <5.06 <3.80 242 189 <1.48 <1.08 <2.78 <1.62 <2.26 705 301 <7.56 <3.44 < < < - - - - - - - - 1/10/17 1,430 353 484 1,280 650 94.5 <1.50 <2.30 <2.22 < <2.60 <2.25 < 204 <4.70 62 12 < <4.75 176 127 19 <1.35 <3.48 <2.02 < 464 173 < <4.30 <8.80 <2.42 < - - - - - - - - 8/9/17 23.8 34.4 92.2 167 <0.169 1.43 <0.0600 < 2.33 < < < <0.0900 <0.114 <0.188 43 14.7 < < 41.6 88.4 1.51 <0.0540 <0.139 < < 138 73.8 < < 13.6 < < - - - - - - - - 2/27/18 291 272 485 1,280 28.5 8.84 < < 1.48 < < <0.180 < <0.228 < 115 14.4 < < 318 253 6.64 1.22 <0.278 < < 657 367 < < 22.5 < <6.00 - - - - - - - - 7/19/18 333 197 413 971 F 34.7 7.7 < 13.2 < < < < 0.900 < < 1.14 < 84.4 16.9 < < 248 183 14.1 < 0.540 < 1.39 < < 471 245 < < < < < - - - - - - - - 1/3/2019 161 194 333 � < 1.69 < 0.920 < 0.600 11 < < < < 0.900 < < 1.14 < 65.2 17.4 < < 362 145 12.6 < 0.540 < 1.39 < < 288 180 < < < < < - - - - - - - - 8/14/19 66.7 16.7 48.9 77.4 12.6 < 0.0920 14.7 8.52 1.45 < < < 0.0900 < 0.180 6.04 < 0.188 23.8 10.7 < 0.253 < 36.8 47.3 1.09 < 0.0540 < 0.139 < < 58.5 17.4 < < < 0.352 < < - - - - - - - - 1/8/2020 1,990 507 1,110 2,260 982 119 < 0.0600 11.1 1.03 < < < 0.0900 < 688 9.48 81.1 10.4 22.9 < 0.190 390 155 2.48 0.81 < 79.7 < 663 163 < < < 0.352 < < - - - - - - - - 7/28/2020 157 43.8 141 175.7 65 11 24.7 10.6 2.1 < < < 2.03 < 6.2 < 38.9 11.7 < < 71.9 83.4 < 1.76 < 1.61 < 1.97 5.7 < 112 73.4 < < < 22.7 < < < - - - - - - - - - MW10 12/12/11 4,100 920 3,400 9,200 970 160 180 <100 <100 <100 <100 400 <100 130 <100 < < 860/620 340 <100 100 <100 <100 < 2,500 700 < < < < < <1 8.4 19,000 19,790 - <100 6,500 60 <10 0.095 6/21/13 3,450 813 3,100 7,440 545 136 <6 <9.20 <8.90 <10.5 <12.1 <9 < 450 <18.8 145 <8.90 <25.3 <19 885 387 49 J 52 42 <8.10 <11.3 1,760 478 < < < < < - - - - - - - - - - 6/30/15 1,860 440 1,750 3,940 573 137 <0.600 10 <0.890 <1.72 <1.04 < < 355 <1.88 77.1 8.2 < < 513 204 <0.740 37.8 38.7 <0.810 < 998 306 <3.78 < < < < - - - - - - - 12/1/15 1,510 397 1,900 4,310 498 123 <0.600 10.5 17.6 < < <0.900 <1.80 314 <1.88 88.4 <0.890 < <1.90 693 223 <0.740 32.2 36.6 < < 955 288 < <1.72 < < < - - - - - - - 6/2/16 1,360 236 1,030 2,305 422 92 <1.20 <1.84 <1.78 <2.10 <2.42 <1.80 <3.60 230 <3.76 52.8 4.8 <5.06 <3.80 306 123 <1.48 25.2 26.6 <1.62 <2.42 504 161 <7.56 <3.44 < < < - - - - - - - 1/10/17 1,150 340 1,910 3,850 489 111 <1.50 <2.30 <2.22 < <2.60 <2.25 < 266 <4.70 91.2 7 < <4.75 515 187 39.5 5.5 38.2 <2.02 < 692 202 < <4.30 <8.80 <2.42 < - - - - - - - - - MW11 12/12/11 21,000 33,000 3,600 23,900 <200 5,200 <200 <200 < < <200 <200 260 490 <200 <200 <200 <1,000/- 410 1,100 <200 <200 <200 < 3,000 780 < < < < < - - 96,000 36,000 6,800 - 130 - 300 3/9/12 FREE PRODUCT 0.41' 6/21/13 FREE PRODUCT 0.24' 7/16/13 12/23/14 FREE PRODUCT 0.08' FREE PRODUCT 0.03' 6/30/15 FREE PRODUCT: SHEEN 7/7/15 M � FREE PRODUCT. SHEEN 12/1/15 21,500 36,300 3,100 24,620 <8.45 2,860 52 <4.60 <4.45 < < 451 <9.40 157 10.5 J < 151 1,480 431 987 <2.70 < < 2,970 704 < <8.60 < < < - - - - - - - - 6/2/16 20,400 29,900 3,180 18,300 <16.9 3,190 <6 <9.20 <8.90 <10.5 <12.1 <9 442 <18.8 126 <8.90 <25.3 242 931 338 875 <5.40 <8.10 <11.3 2,310 594 <37.8 <17.2 < < < - - - - - - - - 1/10/17 FREE PRODUCT: 0.11 FEE 8/9/17 9,260 16,500 2,560 17,000 <67.6 864 <24.0 < <35.6 < < < <36.0 200 <75.2 236 < < 1,230 288 776 <21.6 <55.6 < < 2,150 516 < < <141 < < - - - - - - 2/27/18 � 0.10 FEET OF FREE PRODUCT 7/19/18 17,800 29,200 2,710 18,560 < 33.8 1,020 < < 18.4 < < < < 18.0 < 240 < 110 < 17.8 < < 1,060 292 826 < 10.8 < 27.8 < < 2,370 542 < < < < < - - - - - - - 1/3/2019 14,800 20,000 2,310 14,930 < 33.8 926 < 12.0 < 18.4 < < < < 18.0 < 242 < 118 138 < < 1,120 316 650 < 10.8 < 27.8 < < 2,350 602 < < < < < - - - - - - - 8/14/19 15,900 17,300 3,630 18,260 < 33.8 890 < 12.0 < 18.4 < 67.8 < < < 18.0 < 36.0 230 < 37.6 160 < 17.8 < 50.6 < 1,400 416 880 < 10.8 < 27.8 < < 2,930 756 < < 1,710 < < - - - - - - - 1/8/2020 10,800 19,100 2,310 13,560 < 33.8 748 < 12.0 < 18.4 < 67.8 < < < 18.0 < 166 < 37.6 124 342 < 50.6 < 38.0 914 324 718 < 10.8 < < 16.2 < 2,180 562 < < < 70.4 < < - - - - - - - 7/28/2020 5,650 12,700 3,040 7,540 < 39.5 334 74 < 67.2 < 66.8 < < 162 < 80 < 142 < 67.1 < < 1,030 376 < 70.5 < 64.5 < 78.6 < 76.2 < 1,670 422 < < < 906 < < < - - - - - - - Notes: 1. Results reported in µg/L. 2. < - denotes less than the sample's method detection limit. 3. BOLD denotes a detected concentration above the method detection limit. 4. Shading denotes a 2L Standard violati 5. Italics indicates a GCL violation. 6. "NE" = Not Established 7. "-" = Indicates compound not tested per that method. 8. MTBE and Naphthalene for the MW15 and MW18 samples taken on 3/19/12 were re -run using the sample's method detection limit. 9. Monitoring well MW11 was sampled of Decmeber 12, 2012. However, during the March 19, 2012 sampling event monitoring well MW11 contained free product. Page 1 of 2 HISTORICAL SUMMARY OF GROUNDWATER SAMPLING RESULTS Incident Name: Northgate Shell Incident No.: 15968 < z a a N a > a > a > a > a > co 0o 0o c0 c0 c0 c0 0o 0o m m co c0 0o 0o c0 0o co m � m c0 00 00 m m c0 c0 00 c0 c0 0o 0o 0o < z < z a w a w a w a w Cl- w U co 0 0 0 o 0 O O O O O O O 0 O 0 O 0 0 0 0 0 0 0 O 0 O 0 O 0 O 0 O 0 O 0 O 0 o 0 o 0 O 0 O 0 O O O 0 O 0 O O O O 0 O O O O 0 O 0 O 0 0 m m 0 0 0 _ 0 0 0 0 - Analytical Method N N N N N N N N N N N (14 N N N N N N N N N rV N N N N N N N rV N N (14 Ln (14rN Ln < 2 < 2 < 2 a < 2 < 2 rn O O O � � W 1.0 0 0 W W W W LD W W ko W W W W W W � W 0 W W W W W 0 0 W W W W W w M Ln Contaminant of Concern v v c v s v c w U a w v � a) C a) a) � s N c c � +� �". O a) O U s a) a) Q N V) u a1 a) s VD s fuN O O a1 7 O C v a) a) w N T ro U In U U a r0 N C �n a) v N ^' C C N 0 a) a1 0 N 0 a) 0 O s U N C O a, Q s U N �' a1 N v 70 O L +-+ L +� C X '+., ra ro L ca L s Q >= E O N a1 a) 0 O O V O_ fV C O a) O !_ E E != O a--� v T s Q .Q Q '- Q 0 i < E v v s 4 t s ° s 0 N >- 0 >- a) 0 0 U L 0 O a) a < < < �0 < ry _� ' c X w >, 0 m 0 m 0 U o U 0 0 [V `--I � OD- - Q as-+ v >, t � t O_ o U ra O U '7 H H ra +I O - c O 0 O c v N >, 00 00 � rN � rn U O � N U Date ^' 0 > s +' m H W m U L o N N ri a o cc G +� a1 0- 0 a ? }' s > C N N �n r'n m o E O ra t v7 +� a1 U U U Ol U `� -0 frs O i m Well ID Collected m w c a) Wci ,� U ri ri ri a ,� z c cn .0 > rl ri ri ri N U < m w m o U U U U U U -j U w MW12 12/12/11 <1 <5 <1 <3 17 55 <1 <1 <1 <1 <1 <1 <1 <1 <1 < < <5/- <1 <1 <1 <1 <1 < <1 <1 < < < < < - - 140 <100 - <100 - <5 - 0.15 6/21/13 <0.119 <0.0570 <0.0920 <0.298 8.81 1.38 <0.0600 <0.0920 <0.0890 <0.105 <0.121 <0.0900 < <0.114 <0.188 <0.0980 <0.0890 <0.253 <0.190 <0.0940 <0.0650 <0.0740 <0.0540 <0.139 <0.0810 <0.113 <0.103 <0.0870 < < < < < - - - - - - - - - - - 6/30/15 <0.119 <0.0570 <0.0920 <0.298 1.94 2.81 <0.0600 <0.0920 <0.0890 <0.172 <0.104 < < <0.114 <0.188 <0.0980 <0.0890 < < <0.0940 <0.0650 <0.0740 <0.0540 <0.139 <0.0810 < <0.103 <0.0870 <0.378 < < < < - - - - - - - - - - - 12/1/15 <0.119 <0.0570 <0.0920 <0.298 <0.169 2.8 <0.0600 <0.0920 <0.0890 < < <0.0900 <0.180 <0.114 <0.188 <0.0980 <0.0890 < <0.190 <0.0940 <0.0650 <0.0740 <0.0540 <0.139 < < <0.103 <0.0870 < <0.172 < < < - - - - - - - - - - - 6/2/16 <0.119 <0.0570 <0.0920 <0.298 1.52 1.54 <0.0600 <0.0920 <0.0890 <0.105 <0.104 <0.0900 <0.180 <0.114 <0.188 <0.0980 <0.0890 <0.253 <0.190 <0.0940 <0.0650 <0.0740 <0.0540 <0.139 <0.0810 <0.113 <0.103 <0.0870 <0.378 <0.172 < < < - - - - - - - - - - - MW13 5/18/12 260 <250 790 1,490 1,400 <50 <50 <50 < < <50 <50 <50 4,300 <50 <50 98 <250/- 330 <50 <50 85 <50 < 2,000 650 < < < < < - - 3,600 - 5,800 - 3,600 - 32 - <0.010 6/21/13 354 280 1,120 2,470 1,270 71.5 <3 <4.60 <4.45 <5.25 15 <4.50 < 3,250 17.5 J 88 <4.45 <12.7 <9.50 288 270 <3.70 <2.70 78.5 <4.05 <5.65 1,290 376 < < < < < - - - - - - - - - - - MW13A 6/30/15 252 275 1,300 2,498 851 15 103 23.4 <0.445 <0.860 <0.520 < < 1,690 16.1 124 13.6 < < 449 D 434 <0.370 10.4 109 6.3 < 1,850 538 <1.89 < < < < - - - - - - - - - - - 12/1/1S 310 183 1,120 1,626 406 12.5 <0.300 15.8 <0.445 < < <0.450 <0.900 1,470 <0.940 87 9.05 < <0.950 343 295 <0.370 <0.270 26.3 < < 1,530 469 < 6.5 < < < - - - - - - - - - - - 6/2/16 108 126 1,290 1,609 705 <1.84 51.2 <1.84 21.4 <2.10 <2.08 <1.80 <3.60 3,640 <3.76 77.4 <1.78 <5.06 <3.80 332 51.2 <1.84 <1.08 <2.78 <1.62 <2.26 1,370 429 <7.56 <3.44 < < < - - - - - - - - - - 1/10/17 108 83.5 874 1,020 1,070 <4.60 <3.00 <4.60 <4.45 < <5.20 <4.50 < 1,320 <9.40 61 13.5 < <9.50 190 198 30 <2.70 <6.95 <4.05 < 1,200 314 < <8.60 <17.6 <4.85 < - - - - - - - - - - - MW14 12/12/11 37 160 300 1,070 1,400 170 68 <10 < < <10 <10 <10 210 <10 33 14 < < 110/- 92 <10 160 300 <10 < 660 220 < < < < < - - 4,200 - 4,100 - 1,600 - <5 - <0.010 6/21/13 19.4 28 167 390 1,620 17.1 <0.600 <0.920 <0.890 <1.05 <1.21 6.60 192 <1.88 24.4 <0.890 <2.53 <1.90 <0.940 78.6 <0.740 79.3 228 <0.810 <1.13 553 180 < < < < < MW15 3/19/12 6,500 25,000 1,300 13,200 <130 <500 <500 <500 < < <500 <500 <500 <500 <500 <500 <500 < < 610/- <500 <500 <500 <500 <500 < 1,300 <500 < < < < < - - 55,000 - 21,000 - <5,000 - 59 - 16 6/21/13 8,850 33,600 5,380 20,110 <84.5 115 <30 <46 <44.5 <52.5 <52 <45 < <57 <94 385 <44.5 <127 1,580 8,000 1,200 635 <27 <69.5 <40.5 <56.5 4,810 1,300 < < < < < - - - - - - - - - - - 6/30/15 7,950 32,400 4,410 19,090 <16.9 91 <6.00 <9.20 <8.90 <17.2 <10.4 < < 46 J <18.8 152 <8.90 < < 1,630 440 693 <5.40 <13.9 <8.10 < 2,660 690 <37.8 < < < < - - - - - - - - - - - 12/1/15 5,770 27,600 4,030 18,520 <16.9 <9.20 <6 <9.20 <8.90 < < <9 <18 <11.4 <18.8 126 <8.90 < <19 1,140 348 629 <5.40 <13.9 < < 2,650 683 < <17.2 < < < - - - - - - - - - - - 6/2/16 2,820 14,300 1,950 7,660 <16.9 59 <6 <9.20 <8.90 <10.5 <12.1 <9 <18 24 <18.8 <9.80 <8.90 <25.3 235 648 106 263 <5.40 <13.9 <8.10 <11.3 1,040 277 <37.8 <17.2 < < < - - - - - - - - - - - 1/10/17 3,650 20,000 2,560 11,700 <33.8 42 <12.0 <18.4 <17.8 < <20.8 <18.0 < 108 <37.6 80 26 < 246 366 178 390 <10.8 <27.8 <16.2 < 1,570 390 < <34.4 562 <19.4 < - - - - - - - - - - - 8/9/17 2,550 9,630 1,100 4,580 <42.2 <23.0 <15.0 < <22.2 < < < <22.5 <28.5 <47.0 122 <22.2 < < 670 85 272 <13.5 <34.8 < < 540 160 < < <88.0 < < - - - - - - - - - - - 2/27/18 686 1,320 393 1,810 <4.22 17 < < <2.22 < < <2.25 < 16.8 < 10.8 <2.22 < < 108 28.2 34.5 <1.35 <3.48 < < 366 107 < < 89.5 < 926 - - - - - - - - - - - 7/19/18 2,200 11,200 1,300 5,350 18.5 28.3 < < 2.30 < < < < 2.25 < 16.8 < 31.8 < 2.23 < < 255 69.8 184 < 1.35 < 3.48 < < 733 185 < < < < < - - - - - - - - - - - 1/3/2019 < 0.119 < 0.0570 < 0.0920 < 0.122 < 0.169 < 0.0920 < 0.0600 < 0.0920 < < < < 0.0900 < < 0.114 < < 0.0980 < 0.0890 < < < 0.0940 < 0.0650 < 0.0740 < 0.0540 < 0.139 < < < 0.103 < 0.0870 < < < < < - - - - - - - - - - - 8/14/19 1,860 8,410 954 3,980 24 39.7 < 0.0600 2.11 < 0.339 < < < 0.0900 < 0.180 8.87 < 0.188 23.7 1.34 13.8 < 359 59.6 164 < 0.0540 < 0.139 < < 512 130 < < 2.39 < < - - - - - - - - - - - 1/8/2020 4,340 25,300 3,000 12,460 65 81 < 6.00 < 9.20 < 33.9 < < < 9.00 < < 11.4 < 18.8 77 171 < 25.3 368 593 182 358 < 5.40 < < 8.10 < 1,450 364 < < 435 < < - - - - - - - - - - - 7/28/2020 2,830 15,300 1,930 7,460 146 < 71.9 < 68.4 < 67.2 < 66.8 < < < 81.1 < < 78.6 < < 72.6 < 67.1 < < 376 114 188 < 64.5 < 78.6 < 76.2 < 888 222 < < < 906 < < < - - - - - - - - - - MW16 3/19/12 1.3 16 14 73 <1 17 <1 3.1 < < <1 <1 <1 1.4 <1 4.1 1.4 < < 7.1/- 12 1 17 5.2 <1 < 77 33 < < < < < - - 640 - 700 - 380 - <5 - <0.010 6/21/13 <0.1119 <0.0570 0.3 0.298 <0.169 4.36 <0.0600 2.79 <0.0890 <0.105 <0.121 <0.0900 < 0.800 <0.188 0.860 <0.0890 <0.253 <0.190 <0.0940 1.31 <0.0740 6.65 1.41 <0.0810 <0.113 2.49 <0.0870 < < < < < - - - - - - - - - - 6/30/15 2.58 41.9 12.2 22.28 <0.169 29.6 <0.0600 1.82 <0.0890 <0.172 <0.104 < < 11.7 <0.188 1.51 <0.0890 < < 1.73 J 2.05 <0.0740 72.1 17.5 <0.0810 < 3.43 <0.0870 <0.378 < < < < - - - - - - - - - - - 12/1/15 <0.119 1.86 15.5 1.562 <0.169 27.4 <0.0600 <0.0920 <0.0890 < < <0.0900 <0.180 <0.114 <0.188 <0.0980 1.29 < <0.190 <0.0940 <0.0650 <0.0740 212 <0.139 < < <0.103 <0.0870 < <0.172 < < < - - - - - - - - - - - 6/2/16 <0.238 <0.114 <0.184 <0.596 <0.338 5.2 <0.120 <0.184 <0.178 <0.210 <0.208 <0.180 <0.360 <0.228 <0.376 <0.196 <0.178 <0.506 <0.380 <0.188 <0.130 <0.148 26.2 7.02 <0.162 <0.226 <0.206 <0.174 45.6 <0.344 < < < - - - - - - - - - - - MW17 3/19/12 <1 <5 <1 <3 750 18 <1 1.4 < < <1 4.3 <1 16 <1 <1 <1 < < <5/<1 <1 <1 720 31 <1 < <1 <1 < < < < < - 2 760 - <100 - <100 - <5 - <0.010 6/21/13 1.37 <0.0570 <0.0920 <0.298 158 31.1 <0.0600 4.81 0.32 0.34 <0.121 1.41 < 23.9 0.530 0.620 <0.0890 <0.253 <0.190 <0.0940 <0.0650 <0.0740 99.9 13.8 <0.0810 <0.113 <0.103 <0.0870 < < < < < - - - - - - - - - - - M W 17A 6/30/15 <0.119 <0.0570 <0.0920 <0.298 128 7.19 <0.0600 <0.0920 <0.0890 <0.172 <0.104 < < 231 D <0.188 <0.0980 0.310 J < < <0.0940 <0.0650 <0.0740 322 153 <0.0810 < <0.103 <0.0870 2.73 < < < < - - - - - - - - - - - 12/1/15 <0.119 <0.0570 <0.0920 1.732 128 5.06 <0.0600 <0.0920 <0.0890 < < <0.0900 <0.180 143 D <0.188 <0.0980 <0.0890 < <0.190 <0.0940 <0.0650 <0.0740 295 <0.139 < < <0.103 <0.0870 < <0.172 < < < - - - - - - - - - - - 6/2/16 <0.119 <0.0570 <0.0920 <0.596 186 5.18 <0.0600 <0.0920 <0.0890 <0.210 <0.208 <0.0900 <0.180 102 <0.188 <0.0980 <0.0890 <0.506 <0.190 <0.0940 <0.0650 <0.0740 275 85.9 <1.62 <0.226 <0.103 <0.0870 <0.756 <0.172 < < < - - - - - - - - - - - 1/10/17 <0.595 <0.285 <0.460 <0.900 166 3 <0.300 <0.460 <0.445 < <0.520 <0.450 < 185 5.2 <0.490 <0.445 < 21.8 <0.470 <0.325 <0.370 124 63.4 <0.405 < <0.515 <0.435 < <0.860 1.9 <0.485 < - - - - - - - - - - - 2L Standards 1 600 600 500 20 70 70 70 70 50 7 0.4 0.02 70 100 70 25 NE 5 6 70 70 0.7 3 0.03 0.6 400 400 4,000 70 6,000 10 < 3 6,000 400 700 700 10,000 200 200 15 10 0.02 Gross Contamination Levels 5,000 260,000 84,500 85,500 20,000 70,000 6,900 8,500 15,000 50,000 7,000 400 50 70,000 100,000 25,000 11,700 NE 5,000 6,000 30,000 70,000 700 3,000 30 600 28,500 25,000 4,000,000 70,000 6,000,000 10,000 < 170 NE NE NE NE NE NE NE 15,000 10,000 50 MW18 3/19/12 13,000 1,500 1,200 3,300 55 6,600 <100 <100 < < <100 230 <100 570 <100 <100 <100 < < 330/340 <100 270 <100 <100 <100 < 350 110 < < < < < - <20 38,000 - 7,200 - <5,000 - 15 - 1.9 6/21/13 23,700 5,680 3,120 6,000 <16.9 4,820 <6 <9.20 <8.90 <10.5 <10.4 168 < 595 <18.8 127 <8.90 <25.3 86 796 310 502 <5.40 <13.9 <8.10 <11.3 758 277 < < < < < - - - - - - - - - - - 6/30/15 2,210 2,570 844 1,684 <1.69 569 15.1 8.5 <0.890 <1.72 <1.04 < < 166 10.1 97.7 5.6 < < 231 98.3 33.2 18.7 12.1 36.2 257 65.2 <3.78 < < < < - - - - - - - - - - - 12/1/15 218 246 86.9 194 <0.169 43 <0.0600 8.41 <0.0890 < < <0.0900 <0.180 11.2 <0.188 5.75 7.69 < <0.190 32.3 9.35 6 6.16 23.3 < < 30.7 8.15 < 1.46 < < < - - - - - - - - - - - 6/2/16 486 2,850 582 1,688 71.1 96 10.4 <2.30 <0.178 <0.210 <0.208 <0.180 <0.360 47.6 2.42 54.7 1.44 <0.506 <0.380 131 61.8 22.4 <0.108 5.22 <0.162 <0.226 292 75.5 <0.756 <0.344 < < < - - - - - - - - - - - 1/10/17 304 1,400 683 1,080 32 38 <3.00 <4.60 <4.45 < <5.20 <4.50 < 36.5 <9.40 59 <4.45 < <9.50 122 76.5 41 <2.70 <6.95 <4.05 < 262 65.5 < <8.60 79 <4.85 < - - - - - - - - - - - 8/9/17 587 2,390 1,080 1,480 95.2 59.5 <1.50 < <2.22 < < < <2.25 37.5 <4.70 61 22.2 < < 178 90.5 <1.85 <1.35 <3.48 < < 342 91.8 < < <8.80 < < - - - - - - - - - - - 2/27/18 2,140 1,080 1,950 1,700 <8.45 193 < < <4.45 < < <4.50 < 87.5 < 94 8.5 < < 376 187 <3.70 <2.70 <6.95 < < 617 158 < < 83.5 < 2,150 - - - - - - - - - - - 7/19/18 734 1,610 828 1,136 45 62.3 < < 2.30 < < < < 2.25 < 20.3 < 44.5 < 2.23 < < 160 76 < 1.85 < 1.35 < 3.48 < < 342 82.5 < < < < < - - - - - - - - - - - 1/3/2019 < 0.119 0.7 0.74 2.16 < 0.169 0.64 < 0.0600 < 0.0920 < < < < 0.0900 < < 0.114 < < 0.0980 < 0.0890 < < < 0.0940 < 0.0650 < 0.0740 < 0.0540 < 0.139 < < 3.14 0.81 < < < < < - - - - - - - - - - - 8/14/19 3.24 7.5 9.56 5.72 812 6.13 2.64 1.68 < 0.339 < < 1.29 < 0.180 22.9 < 0.188 4.65 0.7 < 0.253 < 7.38 9.66 < 0.0740 234 19 < < 3.51 0.76 < < < 0.352 < < - - - - - - - - - - - 1/8/2020 31.9 166 399 94.3 302 < 0.920 29.2 < 0.920 < 3.39 < < < 0.900 < < 1.14 < 1.88 29.9 18.2 < 2.53 < 1.90 82.8 49.4 < 0.740 29 < < 0.810 < 63.4 28.5 < < < 3.52 < < - - - - - - - - - - - 7/28/2020 < 7.76 < 7.31 97.2 < 7.17 1,100 14.8 < 6.84 < 6.72 < 6.68 < < < 8.11 < 21 < 16.2 < 6.71 < < < 5.13 26.4 < 7.05 149 10.4 58.4 < 9.6 < 7.03 < < < 90.6 < < < - - - - - - - - - - MW19 3/19/12 <10 <50 840 1,690 1,100 <10 22 22 < < <10 <10 <10 720 <10 110 11 < < 140/- 190 <10 12 17 <10 < 730 320 < < < < - - 8,700 - 5,400 - 2,100 - 9.3 - <0.010 6/21/13 45.1 36.5 1,400 2,470 716 8.8 <0.600 <0.920 <0.890 <1.05 <1.04 <0.900 < 1,020 5.90 197 36.2 <2.53 <1.90 339 441 <0.740 5.50 16.5 32.3 26.2 879 407 < < < < - - - - - - - - - - - 6/30/15 103 37.1 1,450 2,480 631 <0.920 65.8 29.6 <0.890 12.2 <1.04 < < 968 <1.88 229 21.7 < < 552 533 <0.740 <0.540 <1.39 <0.810 < 926 414 <3.78 < < < - - - - - - - - - - - 12/1/15 49.7 21.4 1,090 1,894 362 <0.920 58 27.8 <0.890 < < <0.900 <1.80 500 <1.88 183 18.1 < <1.90 476 434 27.7 <0.540 <1.39 < < 915 367 < <1.72 < < - - - - - - - - - - - 6/2/16 66.9 7.5 274 371.2 22.4 <0.920 <0.600 12.3 <0.0890 <1.05 <1.04 <0.900 <1.80 43 <1.88 83.3 16.4 <2.53 <1.90 157 <1.13 112 90.2 <3.78 <0.172 < < - - - - - - - - - - - 1/10/17 6.88 1.67 9.89 14.5 17 0.6 <0.0600 <0.0920 <0.0890 <0.104 <0.0900 14.3 <0.188 1.29 0.42 <0.190 2.19 2.39 <0.0740 <0.0540 <0.139 <0.0810 8.97 2.99 1.1 12 <0.0970 MW20 6/30/15 6,200 19,000 1,600 8,760 <1.69 607 50.3 13.3 <0.890 <1.72 <1.04 222 <1.88 212 8.8 276 D 427 360 D <0.540 61.3 <0.810 922 D 686 <3.78 - - - - - - - - - - - 12/1/15 FREE PRODUCT 0.11' 6/2/16 FREE PRODUCT 0.22' 1/10/17 28,300 31,200 3,550 23,600 <42.2 2,500 <15.0 <23.0 <22.2 <26.0 <22.5 545 <47.0 152 <22.2 <47.5 572 352 942 <13.5 <34.8 <20.2 2,630 608 <43.0 508 <24.2 8/9/17 0.05 FEET OF FREE PRODUCT 2/27/18 0.23 FEET OF FREE PRODUCT 7/19/18 6,980 24,300 3,400 17,930 < 67.6 < 36.8 < < 36.8 < < < < 36.0 < < 45.6 < < 39.2 < 35.6 < < 1,480 284 1,040 < 21.6 < 55.6 < < 2,110 528 < < < < < - - - - - - - - - - - 1/3/2019 920 8,420 2,710 17,200 < 67.6 < 36.8 < 24.0 < 36.8 < < < < 36.0 < < 45.6 < < 39.2 276 < < 1,880 460 796 < 21.6 < 55.6 < < 3,700 1,010 < < < < < - - - - - - - - - - - 8/14/19 12,000 21,300 3,020 12,480 < 67.6 432 < 24.0 < 36.8 < 136 < < < 36.0 < 72.0 < 45.6 < 75.2 < 39.2 < 35.6 < 101 < 1,360 328 872 < 21.6 < 55.6 < < 2,140 572 < < 3,320 < < - - - - - - - - - - - 1/8/2020 17,000 39,500 3,540 17,660 < 67.6 800 < 24.0 < 36.8 < 136 < < < 36.0 < 220 < 75.2 < 39.2 < 35.6 < 101 < 76.0 1,460 500 1,140 < 21.6 < < 32.4 < 2,960 808 < < 1,820 < < - - - - - - - - - - - 7/28/2020 9,950 21,300 2,760 11,600 195 700 < 171 < 168 < 167 < < < 203 < < 197 < < 182 < 168 < < 635 370 645 < 161 < 197 < 191 < 1,900 505 < < < 2270 < < < - - - - - - - - - - BBT MW11 3/19/12 <1 <5 <1 <3 25 <1 <1 3.4 < < 2.2 <1 <1 730 9.2 <1 <1 < < <5/- <1 <1 61 170 14 < <1 <1 < < < < - - - - - - - - - - - 6/21/13 0.680 <0.0570 <0.0920 <0.298 16.7 0.620 <0.0600 4.19 0.690 <0.105 1.96 <0.0900 < 661 9.92 <0.0980 <0.0890 <0.253 <0.190 <0.0940 <0.0650 <0.0740 68.5 173 12.5 <0.113 <0.103 <0.0870 < < < < - - - - - - - - - - - 6/30/15 <0.119 <0.0570 <0.0920 <0.298 10.2 <0.0920 <0.0600 3.14 <0.0890 <0.172 2.45 < < 911 14.9 <0.0980 <0.0890 < < <0.0940 <0.0650 <0.0740 83 <0.139 <0.0810 < <0.103 <0.0870 <0.378 < < < - - - - - - - - - - - 12/1/15 0.59 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <0.0600 3.78 <0.0890 < < <0.0900 <0.180 943 10.4 <0.0980 <0.0890 < <0.190 <0.0940 <0.0650 <0.0740 88.4 196 < < <0.103 <0.0870 < <0.172 < < - - - - - - - - - - - 6/2/16 <1.19 <0.570 <0.920 <2.98 7.2 <0.920 <0.600 <0.920 <0.890 <1.05 <1.21 <0.900 <1.80 783 10.3 <0.980 <0.890 <2.53 10.2 28.6 <0.650 <0.740 87.2 163 <0.810 <1.13 <1.03 <0.870 <3.78 <1.72 < < - - - - - - - - - - - 1/10/17 <1.19 <0.570 2.5 <1.80 5.5 <0.920 <0.600 <0.920 <0.890 < <1.04 <0.900 < 672 9.4 <0.980 <0.890 < 44.2 <0.940 3.6 <0.740 76.2 124 14.3 <1.03 <0.870 <1.72 <3.52 <0.970 2L Standards 1 600 600 500 20 70 70 70 70 50 7 0.4 0.02 70 100 70 25 100 5 6 70 70 0.7 3 0.03 0.6 400 400 4,000 70 6,000 10 4,000 3 6,000 400 700 700 10,000 200 200 15 10 0.02 Gross Contamination Levels 5,000 260,000 84,500 85,500 20,000 70,000 6,900 8,500 15,000 50,000 7,000 400 50 70,000 100,000 25,000 11,700 100,000 5,000 6,000 30,000 70,000 700 3,000 30 600 28,500 25,000 4,000,000 70,000 6,000,000 10,000 4,000,000 170 NE NE NE NE NE NE NE 15,000 10,000 50 Notes: 1. Results reported in µg/L. 2. < - denotes less than the sample's method detection limit. 3. BOLD denotes a detected concentration above the method detection limit. 4. Shading denotes a 2L Standard violation. 5. Italics indicates a GCL violation. 6. "NE" = Not Established 7. "-" = Indicates compound not tested per that method. 8. MTBE and Naphthalene for the MW15 and MW18 samples taken on 3/19/12 were re -run using the sample's method detection limit. 9. Monitoring well MW11 was sampled of Decmeber 12, 2012. However, during the March 19, 2012 sampling event monitoring well MW11 contained free product. Page 2 of 2 Contaminant Concentration vs. Time - MW1 Contaminant Concentration vs. Time - MW2 Contaminant Concentration vs. Time - MW6 Contaminant Concentration vs. Time - MW7A 600 500 c 400 0 c v ' 300 O U c M c E 200 ro c O U 100 0 Ntitio\��titiKtiti�\y�titiKti3o\��ti3o\y�ti3�\y�ti3�\yV o\��ti��\��y��\y�ti��\��tio\��ti��\y�ti��\y�ti�o\y�ti��\��ti��\y�tio Time J qA 7 E c O U 2,500 2,000 M C 35,000 30,000 J 25,000 c O .Z 20,000 v c O MTBE 15,000 • • • • • • Linear (MTBE) c 10,000 O U 5,000 0 - y�\y�y� (0 y� y� y� y1 tiw yT yC yo yo yo yo yo 0 o�y\ off", V\tip 3�y\ o�y\ o�y\ titi� 3�y\ (s, C5�y\ titi�ti\ -\y\ o�y\ C)�", V\tip 3�y\ o�y\ Time Contaminant Contaminant Concentration vs. Time - MW8 y�\y�yy�\y�yti�\y�ytio\y�yti�\y�yti�\y�y3 o\y�y115 �\y�y3�\y�y34y�yo (s�yo o\y�tiy�\y�yo\y�yh o\y�y4)�\y�y4)�\y�y4)�\y�yo o\y�yo�\yvo�\y�yo Time 12,000 10,000 8,000 —0--MTBE 6,000 Benzene Toluene ♦Naphthalene 4,000 2,000 0 700 600 500 c 0 400 —0--Benzene av U c Toluene 0 c 300 Ethylbenzene C c ♦Total Xylenes E fu PIPE 200 0 U 100 0 T y�yV\y� y�y\y� o�y\, ��y\yh tidy\yo ��y\yo tidy\y� y y y Time y Contaminant Concentration vs. Time - MW9 yti�y�yy°\y\y�y\ytiyKIII �I\y111 ��,�y\ytiti�y\'Y \y15 N�,�y\yyti�y\y -\'*Y \111 \1111\y��,�y\y�oti�y\y°�y\yA�,�y�yAti�y\yA°\yxy%�,�y\y%ti�y\y�°\y\y��,�y\yoti�y\y�\,yo h\y\y�yo\y\y� 3�y\N ��y\N y�y\yo o�y\yo y�y\yo o�y\moo 10,000 9,000 8,000 J c 7,000 C C 6,000 E m 0 5,000 U 4,000 c E 3,000 0 U 2,000 1,000 7000 6000 5000 c 0 4000 v U C O Benzene c 3000 t IPE ro E 2000 O U 1000 0 �- y�\y�yy 3�y\yam e�y\yam o\y�ytiy"5\", ��y\y� 0) \y�y3y�\y�y� Contaminant Concentration vs. Time - MW10 �\y�y o\y�y o\y�y yti�y\y Time 0 y�\y\,Y 3�y\yam o�y\yam o\y\,�, -\,Y 3�y\y� ��y\y� o\y\y3y�\y\y3 3�y\N ��yV o\yV y�\y\yo 3�y\yh o�y\yh o�y\'y -\yh ��yV ��yV o\y\yoo Time 3�y\yh o�y\yh o�y\y� Benzene —*--Toluene Ethylbenzene —0—Total Xylenes y�\y\y� 3�y\yo O�y\yo �\y\yo y�\y\yo t Benzene tToluene Ethylbenzene Total Xylenes —0---MTBE Page 1 of 1 APPENDIX D tiff eu rof ins Environment resting Xenco Analytical Report 668825 for Terraquest Environmental Consultants, P.C. Project Manager: Ryan Kerins NorthGate Shell 02693 08.11.2020 pCCRFQ'�� O. �BORA.- 4147 Greenbriar Dr. Stafford, TX 77477 Xenco-Houston (EPA Lab Code: TX00122): Texas (T104704215-20-36), Arizona (AZ0765), Florida (E871002-33), Louisiana (03054) Oklahoma (2019-058), North Carolina (681), Arkansas (20-035-0) Xenco-Dallas (EPA Lab Code: TX01468): Texas (T104704295-20-25), Arizona (AZ0809) Xenco-El Paso (EPA Lab Code: TX00127): Texas (T104704221-20-17) Xenco-Lubbock (EPA Lab Code: TX00139): Texas (T104704219-20-22) Xenco-Midland (EPA Lab Code: TX00158): Texas (T104704400-19-19) Xenco-Carlsbad (LELAP): Louisiana (05092) Xenco-San Antonio (EPA Lab Code: TNI02385): Texas (T104704534-20-7) Xenco Phoenix (EPA Lab Code: AZ00901): Arizona (AZ0757) Xenco-Tampa: Florida (E87429), North Carolina (483) Page 1 of 33 Final 1.000 tiff eu rof ins Environment Testing ]lento Project Manager: Ryan Kerins Terraquest Environmental Consultants, P.C. 100 E. Ruffin Street Mebane, NC 27302 Reference: Eurofins Xenco, LLC Report No(s): 668825 NorthGate Shell Project Address: Ryan Kerins: We are reporting to you the results of the analyses performed on the samples received under the project name referenced above and identified with the Eurofins Xenco, LLC Report Number(s) 668825. All results being reported under this Report Number apply to the samples analyzed and properly identified with a Laboratory ID number. Subcontracted analyses are identified in this report with either the NELAC certification number of the subcontract lab in the analyst ID field, or the complete subcontracted report attached to this report. Unless otherwise noted in a Case Narrative, all data reported in this Analytical Report are in compliance with NELAC standards. The uncertainty of measurement associated with the results of analysis reported is available upon request. Should insufficient sample be provided to the laboratory to meet the method and NELAC Matrix Duplicate and Matrix Spike requirements, then the data will be analyzed, evaluated and reported using all other available quality control measures. The validity and integrity of this report will remain intact as long as it is accompanied by this letter and reproduced in full, unless written approval is granted by Eurofins Xenco, LLC. This report will be filed for at least 5 years in our archives after which time it will be destroyed without further notice, unless otherwise arranged with you. The samples received, and described as recorded in Report No. 668825 will be filed for 45 days, and after that time they will be properly disposed without further notice, unless otherwise arranged with you. We reserve the right to return to you any unused samples, extracts or solutions related to them if we consider so necessary (e.g., samples identified as hazardous waste, sample sizes exceeding analytical standard practices, controlled substances under regulated protocols, etc). We thank you for selecting Eurofins Xenco, LLC to serve your analytical needs. If you have any questions concerning this report, please feel free to contact us at any time. Respectfully, FOR 11 "FFl *, � � HMO, Chad Bechtold Project Manager A Small Business and Minority Company Houston- Dallas- Midland -Tampa - Phoenix- Lubbock- San Antonio - 8 Paso -Atlanta -New Mexico Page 2 of 33 Final 1.000 tiff eu rof ins Environment resting Xenco Sample Cross Reference 668825 Sample Id MW2 MW6 MW9A MW 11 MW15 MW 18 MW20 Terraquest Environmental Consultants, P.C., Mebane, NC NorthGate Shell Matrix Date Collected Sample Depth W 07.28.202010:30 W 07.28.202010:55 W 07.28.202011:20 W 07.28.202010:40 W 07.28.202010:15 W 07.28.202011:10 W 07.28.202010:48 Lab Sample Id 668825-001 668825-002 668825-003 668825-004 668825-005 668825-006 668825-007 Page 3 of 33 Final 1.000 tiff eurofins CASE NARRATIVE Environment Testing Xenco Client Name: Terraquest Environmental Consultants, P.C. Project Name: North Gate Shell Project ID: 02693 Report Date: 08.11.2020 Work Order Number(s): 668825 Date Received: 07.31.2020 Sample receipt non conformances and comments: Sample receipt non conformances and comments per sample: None Analytical non conformances and comments: Batch: LBA-3134076 VOCs by GC/MS by SM6200B SM6200B Batch 3134076 The Matrix Spike (MS) recovery for 2,2-Dichloropropane was above control limits for the spike performed on the sample 668825-002. However, this compound was not detected in the associated sample, and the Laboratory Control Sample (LCS) and Laboratory Control Sample Duplicate (LCSD) recoveries met acceptance criteria. Page 4 of 33 Final 1.000 tiff eu rof ins Environment Testing Xenco Hits Summary 668825 Terraquest Environmental Consultants, P.C., Mebane, NC NorthGate Shell Below is a summary of the analytes which were found to be present in the samples associated with this work order. This should only be used in conjunction with the included analytical results. Sample ID: MW2 Sample ID: 668825-001 Date/Time Sampled: 07.28.202010:30 Matrix: Water Analyte Name Method CAS No. Dil. Result RL/PQL MDL Units Qual 1,2,4-Trimethylbenzene SM6200B 95-63-6 250 2800 250 83.8 ug/L 1,3,5-trimethylbenzene SM6200B 108-67-8 250 668 125 87.9 ug/L Acetone SM6200B 67-64-1 250 1570 6250 1130 ug/L J Benzene SM6200B 71-43-2 250 918 250 97.1 ug/L Ethylbenzene SM6200B 100-41-4 250 3960 125 88.7 ug/L Naphthalene SM6200B 91-20-3 250 905 625 64.1 ug/L Toluene SM6200B 108-88-3 250 13800 125 91.4 ug/L Total Xylenes SM6200B 1330-20-7 250 18760 250 89.7 ug/L isopropylbenzene SM6200B 98-82-8 250 153 125 90.8 ug/L m,p-Xylenes SM6200B 179601-23-1 250 12600 250 179 ug/L n-Propylbenzene SM6200B 103-65-1 250 405 125 76.7 ug/L o-Xylene SM6200B 95-47-6 250 6160 250 89.7 ug/L Sample ID: MW6 Sample ID: 668825-002 Date/Time Sampled: 07.28.2020 10:55 Matrix: Water Analyte Name Method CAS No. Dil. Result RL/PQL MDL Units Qual 1,2-Dichloroethane SM6200B 107-06-2 5 3.75 2.50 2.03 ug/L Benzene SM6200B 71-43-2 5 3.15 5.00 1.94 ug/L J Diisopropyl ether SM6200B 108-20-3 5 50.6 2.50 1.80 ug/L Methyl tert-butyl ether (MTBE) SM6200B 1634-04-4 20 1210 20.0 3.95 ug/L D Tetrachloroethylene SM6200B 127-18-4 5 2.60 2.50 1.61 ug/L isopropylbenzene SM6200B 98-82-8 5 2.45 2.50 1.82 ug/L J Sample ID: MW9A Sample ID: 668825-003 Date/Time Sampled: 07.28.2020 11:20 Matrix: Water Analyte Name Method CAS No. Dil. Result RL/PQL MDL Units Qual 1,2,4-Trimethylbenzene SM6200B 95-63-6 5 112 5.00 1.68 ug/L 1,3,5-trimethylbenzene SM6200B 108-67-8 5 73.4 2.50 1.76 ug/L Benzene SM6200B 71-43-2 5 157 5.00 1.94 ug/L Diisopropyl ether SM6200B 108-20-3 5 11.0 2.50 1.80 ug/L Ethylbenzene SM6200B 100-41-4 5 141 2.50 1.77 ug/L Methyl tert-butyl ether (MTBE) SM6200B 1634-04-4 5 65.0 5.00 0.988 ug/L Naphthalene SM6200B 91-20-3 5 71.9 12.5 1.28 ug/L Sec-Butylbenzene SM6200B 135-98-8 5 10.6 2.50 1.68 ug/L Toluene SM6200B 108-88-3 5 43.8 2.50 1.83 ug/L Total Xylenes SM6200B 1330-20-7 5 175.7 5 1.79 ug/L Vinyl Chloride SM6200B 75-01-4 5 5.70 2.50 1.91 ug/L cis-1,2-Dichloroethene SM6200B 156-59-2 5 6.20 5.00 1.97 ug/L isopropylbenzene SM6200B 98-82-8 5 38.9 2.50 1.82 ug/L SM6200B Page 5 of 33 Final 1.000 tiff eu rof ins Environment resting Xenco Hits Summary 668825 Terraquest Environmental Consultants, P.C., Mebane, NC NorthGate Shell Sample ID: 668825-003 Date/Time Sampled: 07.28.2020 11:20 Matrix: Water m,p-Xylenes n-Butylbenzene n-Propylbenzene o-Xylene p-Cymene (p-Isopropyltoluene) tert-Butylbenzene Sample ID: MW11 SM6200B SM6200B SM6200B SM6200B SM6200B Sample ID: 668825-004 179601-23-1 5 113 5.00 104-51-8 5 24.7 2.50 103-65-1 5 83.4 2.50 95-47-6 5 62.7 5.00 99-87-6 5 11.7 5.00 98-06-6 5 2.10 5.00 Date/Time Sampled: 07.28.2020 10:40 3.59 1.71 1.53 1.79 1.68 1.67 ug/L ug/L ug/L ug/L ug/L ug/L J Matrix: Water Analyte Name Method CAS No. Dil. Result RL/PQL MDL Units Qual 1,2,4-Trimethylbenzene SM6200B 95-63-6 200 1670 200 67.0 ug/L 1,2-Dichloroethane SM6200B 107-06-2 200 162 100 81.1 ug/L 1,3,5-trimethylbenzene SM6200B 108-67-8 200 422 100 70.3 ug/L Benzene SM6200B 71-43-2 200 5650 200 77.6 ug/L Diisopropyl ether SM6200B 108-20-3 200 334 100 71.9 ug/L Ethylbenzene SM6200B 100-41-4 200 3040 100 70.9 ug/L Naphthalene SM6200B 91-20-3 200 1030 500 51.3 ug/L Toluene SM6200B 108-88-3 200 12700 100 73.1 ug/L Total Xylenes SM6200B 1330-20-7 200 7540 200 71.7 ug/L cis-1,2-Dichloroethene SM6200B 156-59-2 200 80.0 200 78.6 ug/L J isopropylbenzene SM6200B 98-82-8 200 142 100 72.6 ug/L m,p-Xylenes SM6200B 179601-23-1 200 4340 200 143 ug/L n-Butylbenzene SM6200B 104-51-8 200 74.0 100 68.4 ug/L J n-Propylbenzene SM6200B 103-65-1 200 376 100 61.4 ug/L o-Xylene SM6200B 95-47-6 200 3200 200 71.7 ug/L Sample ID: MW15 Sample ID: 668825-005 Date/Time Sampled: 07.28.2020 10:15 Matrix: Water Analyte Name Method CAS No. Dil. Result RL/PQL MDL Units Qual 1,2,4-Trimethylbenzene SM6200B 95-63-6 200 888 200 67.0 ug/L 1,3,5-trimethylbenzene SM6200B 108-67-8 200 222 100 70.3 ug/L Benzene SM6200B 71-43-2 200 2830 200 77.6 ug/L Ethylbenzene SM6200B 100-41-4 200 1930 100 70.9 ug/L Methyl tert-butyl ether (MTBE) SM6200B 1634-04-4 200 146 200 39.5 ug/L J Naphthalene SM6200B 91-20-3 200 376 500 51.3 ug/L J Styrene SM6200B 100-42-5 200 188 100 70.5 ug/L Toluene SM6200B 108-88-3 200 15300 100 73.1 ug/L Total Xylenes SM6200B 1330-20-7 200 7460 200 71.7 ug/L m,p-Xylenes SM6200B 179601-23-1 200 4700 200 143 ug/L n-Propylbenzene SM6200B 103-65-1 200 114 100 61.4 ug/L o-Xylene SM6200B 95-47-6 200 2760 200 71.7 ug/L Page 6 of 33 Final 1.000 tiff eu rof ins Environment Testing Xenco Hits Summary 668825 Terraquest Environmental Consultants, P.C., Mebane, NC NorthGate Shell Sample ID: MW18 Sample ID: 668825-006 Date/Time Sampled: 07.28.2020 11:10 Matrix: Water Analyte Name Method CAS No. Dil. Result RL/PQL MDL Units Qual 1,2,4-Trimethylbenzene SM6200B 95-63-6 20 9.60 20.0 6.70 ug/L J Diisopropyl ether SM6200B 108-20-3 20 14.8 10.0 7.19 ug/L Ethylbenzene SM6200B 100-41-4 20 97.2 10.0 7.09 ug/L Methyl tert-butyl ether (MTBE) SM6200B 1634-04-4 20 1100 20.0 3.95 ug/L Tetrachloroethylene SM6200B 127-18-4 20 149 10.0 6.45 ug/L Trichloroethene SM6200B 79-01-6 20 10.4 20.0 7.86 ug/L J Vinyl Chloride SM6200B 75-01-4 20 58.4 10.0 7.62 ug/L cis-1,2-Dichloroethene SM6200B 156-59-2 20 21.0 20.0 7.86 ug/L isopropylbenzene SM6200B 98-82-8 20 16.2 10.0 7.26 ug/L n-Propylbenzene SM6200B 103-65-1 20 26.4 10.0 6.14 ug/L Sample ID: MW20 Sample ID: 668825-007 Date/Time Sampled: 07.28.2020 10:48 Matrix: Water Analyte Name Method CAS No. Dil. Result RL/PQL MDL Units Qual 1,2,4-Trimethylbenzene SM6200B 95-63-6 500 1900 500 168 ug/L 1,3,5-trimethylbenzene SM6200B 108-67-8 500 505 250 176 ug/L Benzene SM6200B 71-43-2 500 9950 500 194 ug/L Diisopropyl ether SM6200B 108-20-3 500 700 250 180 ug/L Ethylbenzene SM6200B 100-41-4 500 2760 250 177 ug/L Methyl tert-butyl ether (MTBE) SM6200B 1634-04-4 500 195 500 98.8 ug/L J Naphthalene SM6200B 91-20-3 500 635 1250 128 ug/L J Styrene SM6200B 100-42-5 500 645 250 176 ug/L Toluene SM6200B 108-88-3 500 21300 250 183 ug/L Total Xylenes SM6200B 1330-20-7 500 11600 500 179 ug/L m,p-Xylenes SM6200B 179601-23-1 500 7840 500 359 ug/L n-Propylbenzene SM6200B 103-65-1 500 370 250 153 ug/L o-Xylene SM6200B 95-47-6 500 3760 500 179 ug/L Page 7 of 33 Final 1.000 tiff eurof ins Environment Testing Certificate of Analytical Results 668825 Xenco Terraquest Environmental Consultants, P.C., Mebane, NC NorthGate Shell Sample Id: MW2 Matrix: Ground Water Date Received: 07.3 1.2020 09:30 Lab Sample Id: 668825-001 Date Collected: 07.28.2020 10:30 Analytical Method: VOCs by GC/MS by SM6200B Tech: EZA Analyst: EZA Seq Number: 3134037 Parameter Cas Number Prep Method: SM6200B PREP % Moisture: Date Prep: 08.08.2020 11:00 Result RL MDL Units Analysis Date Flag Dil 1, 1, 1,2-Tetrachloroethane 630-20-6 91.7 U 250 91.7 ug/L 08.08.2020 15:08 U 250 1, 1, 1 -Trichloroethane 71-55-6 93.5 U 125 93.5 ug/L 08.08.2020 15:08 U 250 1,1,2,2-Tetrachloroethane 79-34-5 92.5 U 125 92.5 ug/L 08.08.2020 15:08 U 250 1,1,2-Trichloroethane 79-00-5 108 U 250 108 ug/L 08.08.2020 15:08 U 250 1, 1 -Dichloroethane 75-34-3 98.1 U 250 98.1 ug/L 08.08.2020 15:08 U 250 1, 1 -Dichloroethene 75-35-4 88.1 U 250 88.1 ug/L 08.08.2020 15:08 U 250 1, 1 -Dichloropropene 563-58-6 83.5 U 125 83.5 ug/L 08.08.2020 15:08 U 250 1,2,3-Trichlorobenzene 87-61-6 74.3 U 250 74.3 ug/L 08.08.2020 15:08 U 250 1,2,3-Trichloropropane 96-18-4 89.9 U 250 89.9 ug/L 08.08.2020 15:08 U 250 1,2,4-Trichlorobenzene 120-82-1 81.2 U 125 81.2 ug/L 08.08.2020 15:08 U 250 1,2,4-Trimethylbenzene 95-63-6 2800 250 83.8 ug/L 08.08.2020 15:08 250 1,2-Dibromoethane (EDB) 106-93-4 93.9 U 250 93.9 ug/L 08.08.2020 15:08 U 250 1,2-Dichlorobenzene 95-50-1 93.6 U 125 93.6 ug/L 08.08.2020 15:08 U 250 1,2-Dichloroethane 107-06-2 101 U 125 101 ug/L 08.08.2020 15:08 U 250 1,2-Dichloropropane 78-87-5 93.9 U 250 93.9 ug/L 08.08.2020 15:08 U 250 1,3,5-trimethylbenzene 108-67-8 668 125 87.9 ug/L 08.08.2020 15:08 250 1,3-Dichlorobenzene 541-73-1 90.0 U 125 90.0 ug/L 08.08.2020 15:08 U 250 1,3-Dichloropropane 142-28-9 68.8 U 250 68.8 ug/L 08.08.2020 15:08 U 250 1,4-Dichlorobenzene 106-46-7 91.7 U 125 91.7 ug/L 08.08.2020 15:08 U 250 2,2-Dichloropropane 594-20-7 85.7 U 125 85.7 ug/L 08.08.2020 15:08 U 250 2-Butanone (MEK) 78-93-3 258 U 3130 258 ug/L 08.08.2020 15:08 U 250 2-Chlorotoluene 95-49-8 91.3 U 125 91.3 ug/L 08.08.2020 15:08 U 250 2-Hexanone 591-78-6 543 U 3130 543 ug/L 08.08.2020 15:08 U 250 4-Chlorotoluene 106-43-4 87.3 U 125 87.3 ug/L 08.08.2020 15:08 U 250 4-Methyl-2-pentanone (MIBK) 108-10-1 553 U 3130 553 ug/L 08.08.2020 15:08 U 250 Acetone 67-64-1 1570 6250 1130 ug/L 08.08.2020 15:08 J 250 Benzene 71-43-2 918 250 97.1 ug/L 08.08.2020 15:08 250 Bromobenzene 108-86-1 96.4 U 250 96.4 ug/L 08.08.2020 15:08 U 250 Bromochloromethane 74-97-5 95.9 U 250 95.9 ug/L 08.08.2020 15:08 U 250 Bromodichloromethane 75-27-4 93.1 U 250 93.1 ug/L 08.08.2020 15:08 U 250 Bromoform 75-25-2 112 U 250 112 ug/L 08.08.2020 15:08 U 250 Bromomethane 74-83-9 125 U 250 125 ug/L 08.08.2020 15:08 U 250 Carbon Tetrachloride 56-23-5 88.1 U 125 88.1 ug/L 08.08.2020 15:08 U 250 Chlorobenzene 108-90-7 91.7 U 250 91.7 ug/L 08.08.2020 15:08 U 250 Chloroethane 75-00-3 95.2 U 125 95.2 ug/L 08.08.2020 15:08 U 250 Chloroform 67-66-3 95.4 U 250 95.4 ug/L 08.08.2020 15:08 U 250 Chloromethane 74-87-3 98.6 U 250 98.6 ug/L 08.08.2020 15:08 U 250 cis-1,2-Dichloroethene 156-59-2 98.3 U 250 98.3 ug/L 08.08.2020 15:08 U 250 cis- 1,3 -Dichloropropene 10061-01-5 98.3 U 250 98.3 ug/L 08.08.2020 15:08 U 250 Page 8 of 33 Final 1.000 tiff eurof ins Environment Testing Certificate of Analytical Results 668825 Xenco Terraquest Environmental Consultants, P.C., Mebane, NC NorthGate Shell Sample Id: MW2 Matrix: Ground Water Date Received: 07.3 1.2020 09:30 Lab Sample Id: 668825-001 Date Collected: 07.28.2020 10:30 Analytical Method: VOCs by GC/MS by SM6200B Prep Method: SM6200B PREP Tech: EZA % Moisture: Analyst: EZA Date Prep: 08.08.2020 11:00 Seq Number: 3134037 Parameter Cas Number Result RI, MDL Units Analysis Date Flag Dil Dibromochloromethane 124-48-1 105 U 250 105 ug/L 08.08.2020 15:08 U 250 Dichlorodifluoromethane 75-71-8 93.1 U 125 93.1 ug/L 08.08.2020 15:08 U 250 Diisopropyl ether 108-20-3 89.9 U 125 89.9 ug/L 08.08.2020 15:08 U 250 Ethanol 64-17-5 41500 U 125000 41500 ug/L 08.08.2020 15:08 U 250 Ethylbenzene 100-41-4 3960 125 88.7 ug/L 08.08.2020 15:08 250 isopropylbenzene 98-82-8 153 125 90.8 ug/L 08.08.2020 15:08 250 m,p-Xylenes 179601-23-1 12600 250 179 ug/L 08.08.2020 15:08 250 Methylene Chloride 75-09-2 197 U 250 197 ug/L 08.08.2020 15:08 U 250 Methyl tert-butyl ether (MTBE) 1634-04-4 49.4 U 250 49.4 ug/L 08.08.2020 15:08 U 250 Naphthalene 91-20-3 905 625 64.1 ug/L 08.08.2020 15:08 250 n-Butylbenzene 104-51-8 85.5 U 125 85.5 ug/L 08.08.2020 15:08 U 250 n-Propylbenzene 103-65-1 405 125 76.7 ug/L 08.08.2020 15:08 250 o-Xylene 95-47-6 6160 250 89.7 ug/L 08.08.2020 15:08 250 p-Cymene (p-Isopropyltoluene) 99-87-6 83.9 U 250 83.9 ug/L 08.08.2020 15:08 U 250 Sec-Butylbenzene 135-98-8 84.0 U 125 84.0 ug/L 08.08.2020 15:08 U 250 Styrene 100-42-5 88.2 U 125 88.2 ug/L 08.08.2020 15:08 U 250 tert-Butylbenzene 98-06-6 83.5 U 250 83.5 ug/L 08.08.2020 15:08 U 250 Tetrachloroethylene 127-18-4 80.6 U 125 80.6 ug/L 08.08.2020 15:08 U 250 Toluene 108-88-3 13800 125 91.4 ug/L 08.08.2020 15:08 250 Total Xylenes 1330-20-7 18760 250 89.7 ug/L 08.08.2020 15:08 250 trans-1,2-dichloroethene 156-60-5 77.7 U 250 77.7 ug/L 08.08.2020 15:08 U 250 trans-1,3-dichloropropene 10061-02-6 91.3 U 250 91.3 ug/L 08.08.2020 15:08 U 250 Trichloroethene 79-01-6 98.3 U 250 98.3 ug/L 08.08.2020 15:08 U 250 Trichlorofluoromethane 75-69-4 89.8 U 125 89.8 ug/L 08.08.2020 15:08 U 250 Vinyl Acetate 108-05-4 470 U 1250 470 ug/L 08.08.2020 15:08 U 250 Vinyl Chloride 75-01-4 95.3 U 125 95.3 ug/L 08.08.2020 15:08 U 250 Surrogate Cas Number % Recovery Units Limits Analysis Date Flag 1,2-Dichloroethane-D4 17060-07-0 97 % 62-126 08.08.2020 15:08 4-Bromofluorobenzene 460-00-4 105 % 70-130 08.08.2020 15:08 Dibromofluoromethane 1868-53-7 102 % 70-130 08.08.2020 15:08 Toluene-D8 2037-26-5 99 % 83-116 08.08.2020 15:08 Page 9 of 33 Final 1.000 tiff eurof ins Environment Testing Certificate of Analytical Results 668825 Xenco Terraquest Environmental Consultants, P.C., Mebane, NC NorthGate Shell Sample Id: MW6 Matrix: Ground Water Date Received: 07.3 1.2020 09:30 Lab Sample Id: 668825-002 Date Collected: 07.28.2020 10:55 Analytical Method: VOCs by GC/MS by SM6200B Tech: EZA Analyst: EZA Seq Number: 3134076 Parameter Cas Number Prep Method: SM6200B PREP % Moisture: Date Prep: 08.10.2020 15:55 Result RL MDL Units Analysis Date Flag Dil 1, 1, 1,2-Tetrachloroethane 630-20-6 1.83 U 5.00 1.83 ug/L 08.10.2020 16:13 U 5 1, 1, 1 -Trichloroethane 71-55-6 1.87 U 2.50 1.87 ug/L 08.10.2020 16:13 U 5 1,1,2,2-Tetrachloroethane 79-34-5 1.85 U 2.50 1.85 ug/L 08.10.2020 16:13 U 5 1,1,2-Trichloroethane 79-00-5 2.15 U 5.00 2.15 ug/L 08.10.2020 16:13 U 5 1, 1 -Dichloroethane 75-34-3 1.96 U 5.00 1.96 ug/L 08.10.2020 16:13 U 5 1, 1 -Dichloroethene 75-35-4 1.76 U 5.00 1.76 ug/L 08.10.2020 16:13 U 5 1, 1 -Dichloropropene 563-58-6 1.67 U 2.50 1.67 ug/L 08.10.2020 16:13 U 5 1,2,3-Trichlorobenzene 87-61-6 1.49 U 5.00 1.49 ug/L 08.10.2020 16:13 U 5 1,2,3-Trichloropropane 96-18-4 1.80 U 5.00 1.80 ug/L 08.10.2020 16:13 U 5 1,2,4-Trichlorobenzene 120-82-1 1.62 U 2.50 1.62 ug/L 08.10.2020 16:13 U 5 1,2,4-Trimethylbenzene 95-63-6 1.68 U 5.00 1.68 ug/L 08.10.2020 16:13 U 5 1,2-Dibromoethane (EDB) 106-93-4 1.88 U 5.00 1.88 ug/L 08.10.2020 16:13 U 5 1,2-Dichlorobenzene 95-50-1 1.87 U 2.50 1.87 ug/L 08.10.2020 16:13 U 5 1,2-Dichloroethane 107-06-2 3.75 2.50 2.03 ug/L 08.10.2020 16:13 5 1,2-Dichloropropane 78-87-5 1.88 U 5.00 1.88 ug/L 08.10.2020 16:13 U 5 1,3,5-trimethylbenzene 108-67-8 1.76 U 2.50 1.76 ug/L 08.10.2020 16:13 U 5 1,3-Dichlorobenzene 541-73-1 1.80 U 2.50 1.80 ug/L 08.10.2020 16:13 U 5 1,3-Dichloropropane 142-28-9 1.38 U 5.00 1.38 ug/L 08.10.2020 16:13 U 5 1,4-Dichlorobenzene 106-46-7 1.83 U 2.50 1.83 ug/L 08.10.2020 16:13 U 5 2,2-Dichloropropane 594-20-7 1.71 U 2.50 1.71 ug/L 08.10.2020 16:13 UX 5 2-Butanone (MEK) 78-93-3 5.15 U 62.5 5.15 ug/L 08.10.2020 16:13 U 5 2-Chlorotoluene 95-49-8 1.83 U 2.50 1.83 ug/L 08.10.2020 16:13 U 5 2-Hexanone 591-78-6 10.9 U 62.5 10.9 ug/L 08.10.2020 16:13 U 5 4-Chlorotoluene 106-43-4 1.75 U 2.50 1.75 ug/L 08.10.2020 16:13 U 5 4-Methyl-2-pentanone (MIBK) 108-10-1 11.1 U 62.5 11.1 ug/L 08.10.2020 16:13 U 5 Acetone 67-64-1 22.7 U 125 22.7 ug/L 08.10.2020 16:13 U 5 Benzene 71-43-2 3.15 5.00 1.94 ug/L 08.10.2020 16:13 J 5 Bromobenzene 108-86-1 1.93 U 5.00 1.93 ug/L 08.10.2020 16:13 U 5 Bromochloromethane 74-97-5 1.92 U 5.00 1.92 ug/L 08.10.2020 16:13 U 5 Bromodichloromethane 75-27-4 1.86 U 5.00 1.86 ug/L 08.10.2020 16:13 U 5 Bromoform 75-25-2 2.24 U 5.00 2.24 ug/L 08.10.2020 16:13 U 5 Bromomethane 74-83-9 2.49 U 5.00 2.49 ug/L 08.10.2020 16:13 U 5 Carbon Tetrachloride 56-23-5 1.76 U 2.50 1.76 ug/L 08.10.2020 16:13 U 5 Chlorobenzene 108-90-7 1.83 U 5.00 1.83 ug/L 08.10.2020 16:13 U 5 Chloroethane 75-00-3 1.90 U 2.50 1.90 ug/L 08.10.2020 16:13 U 5 Chloroform 67-66-3 1.91 U 5.00 1.91 ug/L 08.10.2020 16:13 U 5 Chloromethane 74-87-3 1.97 U 5.00 1.97 ug/L 08.10.2020 16:13 U 5 cis-1,2-Dichloroethene 156-59-2 1.97 U 5.00 1.97 ug/L 08.10.2020 16:13 U 5 cis- 1,3 -Dichloropropene 10061-01-5 1.97 U 5.00 1.97 ug/L 08.10.2020 16:13 U 5 Page 10 of 33 Final 1.000 tiff eurof ins Environment Testing Certificate of Analytical Results 668825 Xenco Terraquest Environmental Consultants, P.C., Mebane, NC NorthGate Shell Sample Id: MW6 Matrix: Ground Water Date Received: 07.3 1.2020 09:30 Lab Sample Id: 668825-002 Date Collected: 07.28.2020 10:55 Analytical Method: VOCs by GC/MS by SM6200B Tech: EZA Analyst: EZA Seq Number: 3134076 Date Prep: 08.10.2020 15:55 Prep Method: SM6200B PREP % Moisture: Parameter Cas Number Result RL MDL Units Analysis Date Flag Dil Dibromochloromethane 124-48-1 2.10 U 5.00 2.10 ug/L 08.10.2020 16:13 U Dichlorodifluoromethane 75-71-8 1.86 U 2.50 1.86 ug/L 08.11.2020 13:53 U Diisopropyl ether 108-20-3 50.6 2.50 1.80 ug/L 08.10.2020 16:13 Ethanol 64-17-5 831 U 2500 831 ug/L 08.10.2020 16:13 U Ethylbenzene 100-41-4 1.77 U 2.50 1.77 ug/L 08.10.2020 16:13 U isopropylbenzene 98-82-8 2.45 2.50 1.82 ug/L 08.10.2020 16:13 J m,p-Xylenes 179601-23-1 3.59 U 5.00 3.59 ug/L 08.10.2020 16:13 U Methylene Chloride 75-09-2 3.93 U 5.00 3.93 ug/L 08.10.2020 16:13 U Methyl tert-butyl ether (MTBE) 1634-04-4 1210 20.0 3.95 ug/L 08.08.2020 12:43 D Naphthalene 91-20-3 1.28 U 12.5 1.28 ug/L 08.10.2020 16:13 U n-Butylbenzene 104-51-8 1.71 U 2.50 1.71 ug/L 08.10.2020 16:13 U n-Propylbenzene 103-65-1 1.53 U 2.50 1.53 ug/L 08.10.2020 16:13 U o-Xylene 95-47-6 1.79 U 5.00 1.79 ug/L 08.10.2020 16:13 U p-Cymene (p-Isopropyltoluene) 99-87-6 1.68 U 5.00 1.68 ug/L 08.10.2020 16:13 U Sec-Butylbenzene 135-98-8 1.68 U 2.50 1.68 ug/L 08.10.2020 16:13 U Styrene 100-42-5 1.76 U 2.50 1.76 ug/L 08.10.2020 16:13 U tert-Butylbenzene 98-06-6 1.67 U 5.00 1.67 ug/L 08.10.2020 16:13 U Tetrachloroethylene 127-18-4 2.60 2.50 1.61 ug/L 08.10.2020 16:13 Toluene 108-88-3 1.83 U 2.50 1.83 ug/L 08.10.2020 16:13 U Total Xylenes 1330-20-7 1.79 U 5 1.79 ug/L 08.10.2020 16:13 U trans-1,2-dichloroethene 156-60-5 1.55 U 5.00 1.55 ug/L 08.10.2020 16:13 U trans-1,3-dichloropropene 10061-02-6 1.83 U 5.00 1.83 ug/L 08.10.2020 16:13 U Trichloroethene 79-01-6 1.97 U 5.00 1.97 ug/L 08.10.2020 16:13 U Trichlorofluoromethane 75-69-4 1.80 U 2.50 1.80 ug/L 08.10.2020 16:13 U Vinyl Acetate 108-05-4 9.41 U 25.0 9.41 ug/L 08.10.2020 16:13 U Vinyl Chloride 75-01-4 1.91 U 2.50 1.91 ug/L 08.10.2020 16:13 U Surrogate Cas Number % Recovery Units Limits Analysis Date Flag 1,2-Dichloroethane-D4 17060-07-0 100 % 62-126 08.10.2020 16:13 4-Bromofluorobenzene 460-00-4 108 % 70-130 08.10.2020 16:13 Dibromofluoromethane 1868-53-7 106 % 70-130 08.10.2020 16:13 Toluene-138 2037-26-5 100 % 83-116 08.10.2020 16:13 5 5 5 5 5 5 5 5 20 5 5 5 5 5 5 5 5 5 5 20 5 5 5 5 5 5 Page 11 of 33 Final 1.000 tiff eurof ins Environment Testing Certificate of Analytical Results 668825 Xenco Terraquest Environmental Consultants, P.C., Mebane, NC NorthGate Shell Sample Id: MW9A Matrix: Ground Water Date Received: 07.3 1.2020 09:30 Lab Sample Id: 668825-003 Date Collected: 07.28.2020 11:20 Analytical Method: VOCs by GC/MS by SM6200B Tech: EZA Analyst: EZA Seq Number: 3134037 Parameter Cas Number Prep Method: SM6200B PREP % Moisture: Date Prep: 08.08.2020 11:00 Result RL MDL Units Analysis Date Flag Dil 1, 1, 1,2-Tetrachloroethane 630-20-6 1.83 U 5.00 1.83 ug/L 08.08.2020 13:24 U 5 1, 1, 1 -Trichloroethane 71-55-6 1.87 U 2.50 1.87 ug/L 08.08.2020 13:24 U 5 1,1,2,2-Tetrachloroethane 79-34-5 1.85 U 2.50 1.85 ug/L 08.08.2020 13:24 U 5 1,1,2-Trichloroethane 79-00-5 2.15 U 5.00 2.15 ug/L 08.08.2020 13:24 U 5 1, 1 -Dichloroethane 75-34-3 1.96 U 5.00 1.96 ug/L 08.08.2020 13:24 U 5 1, 1 -Dichloroethene 75-35-4 1.76 U 5.00 1.76 ug/L 08.08.2020 13:24 U 5 1, 1 -Dichloropropene 563-58-6 1.67 U 2.50 1.67 ug/L 08.08.2020 13:24 U 5 1,2,3-Trichlorobenzene 87-61-6 1.49 U 5.00 1.49 ug/L 08.08.2020 13:24 U 5 1,2,3-Trichloropropane 96-18-4 1.80 U 5.00 1.80 ug/L 08.08.2020 13:24 U 5 1,2,4-Trichlorobenzene 120-82-1 1.62 U 2.50 1.62 ug/L 08.08.2020 13:24 U 5 1,2,4-Trimethylbenzene 95-63-6 112 5.00 1.68 ug/L 08.08.2020 13:24 5 1,2-Dibromoethane (EDB) 106-93-4 1.88 U 5.00 1.88 ug/L 08.08.2020 13:24 U 5 1,2-Dichlorobenzene 95-50-1 1.87 U 2.50 1.87 ug/L 08.08.2020 13:24 U 5 1,2-Dichloroethane 107-06-2 2.03 U 2.50 2.03 ug/L 08.08.2020 13:24 U 5 1,2-Dichloropropane 78-87-5 1.88 U 5.00 1.88 ug/L 08.08.2020 13:24 U 5 1,3,5-trimethylbenzene 108-67-8 73.4 2.50 1.76 ug/L 08.08.2020 13:24 5 1,3-Dichlorobenzene 541-73-1 1.80 U 2.50 1.80 ug/L 08.08.2020 13:24 U 5 1,3-Dichloropropane 142-28-9 1.38 U 5.00 1.38 ug/L 08.08.2020 13:24 U 5 1,4-Dichlorobenzene 106-46-7 1.83 U 2.50 1.83 ug/L 08.08.2020 13:24 U 5 2,2-Dichloropropane 594-20-7 1.71 U 2.50 1.71 ug/L 08.08.2020 13:24 U 5 2-Butanone (MEK) 78-93-3 5.15 U 62.5 5.15 ug/L 08.08.2020 13:24 U 5 2-Chlorotoluene 95-49-8 1.83 U 2.50 1.83 ug/L 08.08.2020 13:24 U 5 2-Hexanone 591-78-6 10.9 U 62.5 10.9 ug/L 08.08.2020 13:24 U 5 4-Chlorotoluene 106-43-4 1.75 U 2.50 1.75 ug/L 08.08.2020 13:24 U 5 4-Methyl-2-pentanone (MIBK) 108-10-1 11.1 U 62.5 11.1 ug/L 08.08.2020 13:24 U 5 Acetone 67-64-1 22.7 U 125 22.7 ug/L 08.08.2020 13:24 U 5 Benzene 71-43-2 157 5.00 1.94 ug/L 08.08.2020 13:24 5 Bromobenzene 108-86-1 1.93 U 5.00 1.93 ug/L 08.08.2020 13:24 U 5 Bromochloromethane 74-97-5 1.92 U 5.00 1.92 ug/L 08.08.2020 13:24 U 5 Bromodichloromethane 75-27-4 1.86 U 5.00 1.86 ug/L 08.08.2020 13:24 U 5 Bromoform 75-25-2 2.24 U 5.00 2.24 ug/L 08.08.2020 13:24 U 5 Bromomethane 74-83-9 2.49 U 5.00 2.49 ug/L 08.08.2020 13:24 U 5 Carbon Tetrachloride 56-23-5 1.76 U 2.50 1.76 ug/L 08.08.2020 13:24 U 5 Chlorobenzene 108-90-7 1.83 U 5.00 1.83 ug/L 08.08.2020 13:24 U 5 Chloroethane 75-00-3 1.90 U 2.50 1.90 ug/L 08.08.2020 13:24 U 5 Chloroform 67-66-3 1.91 U 5.00 1.91 ug/L 08.08.2020 13:24 U 5 Chloromethane 74-87-3 1.97 U 5.00 1.97 ug/L 08.08.2020 13:24 U 5 cis-1,2-Dichloroethene 156-59-2 6.20 5.00 1.97 ug/L 08.08.2020 13:24 5 cis- 1,3 -Dichloropropene 10061-01-5 1.97 U 5.00 1.97 ug/L 08.08.2020 13:24 U 5 Page 12 of 33 Final 1.000 tiff eurof ins Environment Testing Certificate of Analytical Results 668825 Xenco Terraquest Environmental Consultants, P.C., Mebane, NC NorthGate Shell Sample Id: MW9A Matrix: Ground Water Date Received: 07.3 1.2020 09:30 Lab Sample Id: 668825-003 Date Collected: 07.28.2020 11:20 Analytical Method: VOCs by GC/MS by SM6200B Tech: EZA Analyst: EZA Seq Number: 3134037 Date Prep: 08.08.2020 11:00 Prep Method: SM6200B PREP % Moisture: Parameter Cas Number Result RL MDL Units Analysis Date Flag Dil Dibromochloromethane 124-48-1 2.10 U 5.00 2.10 ug/L 08.08.2020 13:24 U Dichlorodifluoromethane 75-71-8 1.86 U 2.50 1.86 ug/L 08.08.2020 13:24 U Diisopropyl ether 108-20-3 11.0 2.50 1.80 ug/L 08.08.2020 13:24 Ethanol 64-17-5 831 U 2500 831 ug/L 08.08.2020 13:24 U Ethylbenzene 100-41-4 141 2.50 1.77 ug/L 08.08.2020 13:24 isopropylbenzene 98-82-8 38.9 2.50 1.82 ug/L 08.08.2020 13:24 m,p-Xylenes 179601-23-1 113 5.00 3.59 ug/L 08.08.2020 13:24 Methylene Chloride 75-09-2 3.93 U 5.00 3.93 ug/L 08.08.2020 13:24 U Methyl tert-butyl ether (MTBE) 1634-04-4 65.0 5.00 0.988 ug/L 08.08.2020 13:24 Naphthalene 91-20-3 71.9 12.5 1.28 ug/L 08.08.2020 13:24 n-Butylbenzene 104-51-8 24.7 2.50 1.71 ug/L 08.08.2020 13:24 n-Propylbenzene 103-65-1 83.4 2.50 1.53 ug/L 08.08.2020 13:24 o-Xylene 95-47-6 62.7 5.00 1.79 ug/L 08.08.2020 13:24 p-Cymene (p-Isopropyltoluene) 99-87-6 11.7 5.00 1.68 ug/L 08.08.2020 13:24 Sec-Butylbenzene 135-98-8 10.6 2.50 1.68 ug/L 08.08.2020 13:24 Styrene 100-42-5 1.76 U 2.50 1.76 ug/L 08.08.2020 13:24 U tert-Butylbenzene 98-06-6 2.10 5.00 1.67 ug/L 08.08.2020 13:24 J Tetrachloroethylene 127-18-4 1.61 U 2.50 1.61 ug/L 08.08.2020 13:24 U Toluene 108-88-3 43.8 2.50 1.83 ug/L 08.08.2020 13:24 Total Xylenes 1330-20-7 175.7 5 1.79 ug/L 08.08.2020 13:24 trans-1,2-dichloroethene 156-60-5 1.55 U 5.00 1.55 ug/L 08.08.2020 13:24 U trans-1,3-dichloropropene 10061-02-6 1.83 U 5.00 1.83 ug/L 08.08.2020 13:24 U Trichloroethene 79-01-6 1.97 U 5.00 1.97 ug/L 08.08.2020 13:24 U Trichlorofluoromethane 75-69-4 1.80 U 2.50 1.80 ug/L 08.08.2020 13:24 U Vinyl Acetate 108-05-4 9.41 U 25.0 9.41 ug/L 08.08.2020 13:24 U Vinyl Chloride 75-01-4 5.70 2.50 1.91 ug/L 08.08.2020 13:24 Surrogate Cas Number % Recovery Units Limits Analysis Date Flag 1,2-Dichloroethane-D4 17060-07-0 100 % 62-126 08.08.2020 13:24 4-Bromofluorobenzene 460-00-4 104 % 70-130 08.08.2020 13:24 Dibromofluoromethane 1868-53-7 101 % 70-130 08.08.2020 13:24 Toluene-D8 2037-26-5 101 % 83-116 08.08.2020 13:24 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 Page 13 of 33 Final 1.000 tiff eurof ins Environment Testing Certificate of Analytical Results 668825 Xenco Terraquest Environmental Consultants, P.C., Mebane, NC NorthGate Shell Sample Id: MW11 Matrix: Ground Water Date Received: 07.3 1.2020 09:30 Lab Sample Id: 668825-004 Date Collected: 07.28.2020 10:40 Analytical Method: VOCs by GC/MS by SM6200B Tech: EZA Analyst: EZA Seq Number: 3134037 Parameter Cas Number Prep Method: SM6200B PREP % Moisture: Date Prep: 08.08.2020 11:00 Result RL MDL Units Analysis Date Flag Dil 1, 1, 1,2-Tetrachloroethane 630-20-6 73.4 U 200 73.4 ug/L 08.08.2020 14:47 U 200 1, 1, 1 -Trichloroethane 71-55-6 74.8 U 100 74.8 ug/L 08.08.2020 14:47 U 200 1,1,2,2-Tetrachloroethane 79-34-5 74.0 U 100 74.0 ug/L 08.08.2020 14:47 U 200 1,1,2-Trichloroethane 79-00-5 86.1 U 200 86.1 ug/L 08.08.2020 14:47 U 200 1, 1 -Dichloroethane 75-34-3 78.5 U 200 78.5 ug/L 08.08.2020 14:47 U 200 1, 1 -Dichloroethene 75-35-4 70.5 U 200 70.5 ug/L 08.08.2020 14:47 U 200 1, 1 -Dichloropropene 563-58-6 66.8 U 100 66.8 ug/L 08.08.2020 14:47 U 200 1,2,3-Trichlorobenzene 87-61-6 59.4 U 200 59.4 ug/L 08.08.2020 14:47 U 200 1,2,3-Trichloropropane 96-18-4 71.9 U 200 71.9 ug/L 08.08.2020 14:47 U 200 1,2,4-Trichlorobenzene 120-82-1 64.9 U 100 64.9 ug/L 08.08.2020 14:47 U 200 1,2,4-Trimethylbenzene 95-63-6 1670 200 67.0 ug/L 08.08.2020 14:47 200 1,2-Dibromoethane (EDB) 106-93-4 75.1 U 200 75.1 ug/L 08.08.2020 14:47 U 200 1,2-Dichlorobenzene 95-50-1 74.9 U 100 74.9 ug/L 08.08.2020 14:47 U 200 1,2-Dichloroethane 107-06-2 162 100 81.1 ug/L 08.08.2020 14:47 200 1,2-Dichloropropane 78-87-5 75.1 U 200 75.1 ug/L 08.08.2020 14:47 U 200 1,3,5-trimethylbenzene 108-67-8 422 100 70.3 ug/L 08.08.2020 14:47 200 1,3-Dichlorobenzene 541-73-1 72.0 U 100 72.0 ug/L 08.08.2020 14:47 U 200 1,3-Dichloropropane 142-28-9 55.0 U 200 55.0 ug/L 08.08.2020 14:47 U 200 1,4-Dichlorobenzene 106-46-7 73.4 U 100 73.4 ug/L 08.08.2020 14:47 U 200 2,2-Dichloropropane 594-20-7 68.6 U 100 68.6 ug/L 08.08.2020 14:47 U 200 2-Butanone (MEK) 78-93-3 206 U 2500 206 ug/L 08.08.2020 14:47 U 200 2-Chlorotoluene 95-49-8 73.0 U 100 73.0 ug/L 08.08.2020 14:47 U 200 2-Hexanone 591-78-6 435 U 2500 435 ug/L 08.08.2020 14:47 U 200 4-Chlorotoluene 106-43-4 69.8 U 100 69.8 ug/L 08.08.2020 14:47 U 200 4-Methyl-2-pentanone (MIBK) 108-10-1 442 U 2500 442 ug/L 08.08.2020 14:47 U 200 Acetone 67-64-1 906 U 5000 906 ug/L 08.08.2020 14:47 U 200 Benzene 71-43-2 5650 200 77.6 ug/L 08.08.2020 14:47 200 Bromobenzene 108-86-1 77.1 U 200 77.1 ug/L 08.08.2020 14:47 U 200 Bromochloromethane 74-97-5 76.7 U 200 76.7 ug/L 08.08.2020 14:47 U 200 Bromodichloromethane 75-27-4 74.4 U 200 74.4 ug/L 08.08.2020 14:47 U 200 Bromoform 75-25-2 89.8 U 200 89.8 ug/L 08.08.2020 14:47 U 200 Bromomethane 74-83-9 99.7 U 200 99.7 ug/L 08.08.2020 14:47 U 200 Carbon Tetrachloride 56-23-5 70.4 U 100 70.4 ug/L 08.08.2020 14:47 U 200 Chlorobenzene 108-90-7 73.3 U 200 73.3 ug/L 08.08.2020 14:47 U 200 Chloroethane 75-00-3 76.2 U 100 76.2 ug/L 08.08.2020 14:47 U 200 Chloroform 67-66-3 76.3 U 200 76.3 ug/L 08.08.2020 14:47 U 200 Chloromethane 74-87-3 78.9 U 200 78.9 ug/L 08.08.2020 14:47 U 200 cis-1,2-Dichloroethene 156-59-2 80.0 200 78.6 ug/L 08.08.2020 14:47 1 200 cis- 1,3 -Dichloropropene 10061-01-5 78.6 U 200 78.6 ug/L 08.08.2020 14:47 U 200 Page 14 of 33 Final 1.000 tiff eurof ins Environment Testing Certificate of Analytical Results 668825 Xenco Terraquest Environmental Consultants, P.C., Mebane, NC NorthGate Shell Sample Id: MW11 Matrix: Ground Water Date Received: 07.3 1.2020 09:30 Lab Sample Id: 668825-004 Date Collected: 07.28.2020 10:40 Analytical Method: VOCs by GC/MS by SM6200B Prep Method: SM6200B PREP Tech: EZA % Moisture: Analyst: EZA Date Prep: 08.08.2020 11:00 Seq Number: 3134037 Parameter Cas Number Result RL MDL Units Analysis Date Flag Dil Dibromochloromethane 124-48-1 84.1 U 200 84.1 ug/L 08.08.2020 14:47 U 200 Dichlorodifluoromethane 75-71-8 74.5 U 100 74.5 ug/L 08.08.2020 14:47 U 200 Diisopropyl ether 108-20-3 334 100 71.9 ug/L 08.08.2020 14:47 200 Ethanol 64-17-5 33200 U 100000 33200 ug/L 08.08.2020 14:47 U 200 Ethylbenzene 100-41-4 3040 100 70.9 ug/L 08.08.2020 14:47 200 isopropylbenzene 98-82-8 142 100 72.6 ug/L 08.08.2020 14:47 200 m,p-Xylenes 179601-23-1 4340 200 143 ug/L 08.08.2020 14:47 200 Methylene Chloride 75-09-2 157 U 200 157 ug/L 08.08.2020 14:47 U 200 Methyl tert-butyl ether (MTBE) 1634-04-4 39.5 U 200 39.5 ug/L 08.08.2020 14:47 U 200 Naphthalene 91-20-3 1030 500 51.3 ug/L 08.08.2020 14:47 200 n-Butylbenzene 104-51-8 74.0 100 68.4 ug/L 08.08.2020 14:47 1 200 n-Propylbenzene 103-65-1 376 100 61.4 ug/L 08.08.2020 14:47 200 o-Xylene 95-47-6 3200 200 71.7 ug/L 08.08.2020 14:47 200 p-Cymene (p-Isopropyltoluene) 99-87-6 67.1 U 200 67.1 ug/L 08.08.2020 14:47 U 200 Sec-Butylbenzene 135-98-8 67.2 U 100 67.2 ug/L 08.08.2020 14:47 U 200 Styrene 100-42-5 70.5 U 100 70.5 ug/L 08.08.2020 14:47 U 200 tert-Butylbenzene 98-06-6 66.8 U 200 66.8 ug/L 08.08.2020 14:47 U 200 Tetrachloroethylene 127-18-4 64.5 U 100 64.5 ug/L 08.08.2020 14:47 U 200 Toluene 108-88-3 12700 100 73.1 ug/L 08.08.2020 14:47 200 Total Xylenes 1330-20-7 7540 200 71.7 ug/L 08.08.2020 14:47 200 trans-1,2-dichloroethene 156-60-5 62.1 U 200 62.1 ug/L 08.08.2020 14:47 U 200 trans-1,3-dichloropropene 10061-02-6 73.0 U 200 73.0 ug/L 08.08.2020 14:47 U 200 Trichloroethene 79-01-6 78.6 U 200 78.6 ug/L 08.08.2020 14:47 U 200 Trichlorofluoromethane 75-69-4 71.8 U 100 71.8 ug/L 08.08.2020 14:47 U 200 Vinyl Acetate 108-05-4 376 U 1000 376 ug/L 08.08.2020 14:47 U 200 Vinyl Chloride 75-01-4 76.2 U 100 76.2 ug/L 08.08.2020 14:47 U 200 Surrogate Cas Number % Recovery Units Limits Analysis Date Flag 1,2-Dichloroethane-D4 17060-07-0 97 % 62-126 08.08.2020 14:47 4-Bromofluorobenzene 460-00-4 106 % 70-130 08.08.2020 14:47 Dibromofluoromethane 1868-53-7 100 % 70-130 08.08.2020 14:47 Toluene-138 2037-26-5 100 % 83-116 08.08.2020 14:47 Page 15 of 33 Final 1.000 tiff eurof ins Environment Testing Certificate of Analytical Results 668825 Xenco Terraquest Environmental Consultants, P.C., Mebane, NC NorthGate Shell Sample Id: MW15 Matrix: Ground Water Date Received: 07.3 1.2020 09:30 Lab Sample Id: 668825-005 Date Collected: 07.28.2020 10:15 Analytical Method: VOCs by GC/MS by SM6200B Tech: EZA Analyst: EZA Seq Number: 3134037 Parameter Cas Number Prep Method: SM6200B PREP % Moisture: Date Prep: 08.08.2020 11:00 Result RL MDL Units Analysis Date Flag Dil 1, 1, 1,2-Tetrachloroethane 630-20-6 73.4 U 200 73.4 ug/L 08.08.2020 15:29 U 200 1, 1, 1 -Trichloroethane 71-55-6 74.8 U 100 74.8 ug/L 08.08.2020 15:29 U 200 1,1,2,2-Tetrachloroethane 79-34-5 74.0 U 100 74.0 ug/L 08.08.2020 15:29 U 200 1,1,2-Trichloroethane 79-00-5 86.1 U 200 86.1 ug/L 08.08.2020 15:29 U 200 1, 1 -Dichloroethane 75-34-3 78.5 U 200 78.5 ug/L 08.08.2020 15:29 U 200 1, 1 -Dichloroethene 75-35-4 70.5 U 200 70.5 ug/L 08.08.2020 15:29 U 200 1, 1 -Dichloropropene 563-58-6 66.8 U 100 66.8 ug/L 08.08.2020 15:29 U 200 1,2,3-Trichlorobenzene 87-61-6 59.4 U 200 59.4 ug/L 08.08.2020 15:29 U 200 1,2,3-Trichloropropane 96-18-4 71.9 U 200 71.9 ug/L 08.08.2020 15:29 U 200 1,2,4-Trichlorobenzene 120-82-1 64.9 U 100 64.9 ug/L 08.08.2020 15:29 U 200 1,2,4-Trimethylbenzene 95-63-6 888 200 67.0 ug/L 08.08.2020 15:29 200 1,2-Dibromoethane (EDB) 106-93-4 75.1 U 200 75.1 ug/L 08.08.2020 15:29 U 200 1,2-Dichlorobenzene 95-50-1 74.9 U 100 74.9 ug/L 08.08.2020 15:29 U 200 1,2-Dichloroethane 107-06-2 81.1 U 100 81.1 ug/L 08.08.2020 15:29 U 200 1,2-Dichloropropane 78-87-5 75.1 U 200 75.1 ug/L 08.08.2020 15:29 U 200 1,3,5-trimethylbenzene 108-67-8 222 100 70.3 ug/L 08.08.2020 15:29 200 1,3-Dichlorobenzene 541-73-1 72.0 U 100 72.0 ug/L 08.08.2020 15:29 U 200 1,3-Dichloropropane 142-28-9 55.0 U 200 55.0 ug/L 08.08.2020 15:29 U 200 1,4-Dichlorobenzene 106-46-7 73.4 U 100 73.4 ug/L 08.08.2020 15:29 U 200 2,2-Dichloropropane 594-20-7 68.6 U 100 68.6 ug/L 08.08.2020 15:29 U 200 2-Butanone (MEK) 78-93-3 206 U 2500 206 ug/L 08.08.2020 15:29 U 200 2-Chlorotoluene 95-49-8 73.0 U 100 73.0 ug/L 08.08.2020 15:29 U 200 2-Hexanone 591-78-6 435 U 2500 435 ug/L 08.08.2020 15:29 U 200 4-Chlorotoluene 106-43-4 69.8 U 100 69.8 ug/L 08.08.2020 15:29 U 200 4-Methyl-2-pentanone (MIBK) 108-10-1 442 U 2500 442 ug/L 08.08.2020 15:29 U 200 Acetone 67-64-1 906 U 5000 906 ug/L 08.08.2020 15:29 U 200 Benzene 71-43-2 2830 200 77.6 ug/L 08.08.2020 15:29 200 Bromobenzene 108-86-1 77.1 U 200 77.1 ug/L 08.08.2020 15:29 U 200 Bromochloromethane 74-97-5 76.7 U 200 76.7 ug/L 08.08.2020 15:29 U 200 Bromodichloromethane 75-27-4 74.4 U 200 74.4 ug/L 08.08.2020 15:29 U 200 Bromoform 75-25-2 89.8 U 200 89.8 ug/L 08.08.2020 15:29 U 200 Bromomethane 74-83-9 99.7 U 200 99.7 ug/L 08.08.2020 15:29 U 200 Carbon Tetrachloride 56-23-5 70.4 U 100 70.4 ug/L 08.08.2020 15:29 U 200 Chlorobenzene 108-90-7 73.3 U 200 73.3 ug/L 08.08.2020 15:29 U 200 Chloroethane 75-00-3 76.2 U 100 76.2 ug/L 08.08.2020 15:29 U 200 Chloroform 67-66-3 76.3 U 200 76.3 ug/L 08.08.2020 15:29 U 200 Chloromethane 74-87-3 78.9 U 200 78.9 ug/L 08.08.2020 15:29 U 200 cis-1,2-Dichloroethene 156-59-2 78.6 U 200 78.6 ug/L 08.08.2020 15:29 U 200 cis- 1,3 -Dichloropropene 10061-01-5 78.6 U 200 78.6 ug/L 08.08.2020 15:29 U 200 Page 16 of 33 Final 1.000 tiff eurof ins Environment Testing Certificate of Analytical Results 668825 Xenco Terraquest Environmental Consultants, P.C., Mebane, NC NorthGate Shell Sample Id: MW15 Matrix: Ground Water Date Received: 07.3 1.2020 09:30 Lab Sample Id: 668825-005 Date Collected: 07.28.2020 10:15 Analytical Method: VOCs by GC/MS by SM6200B Prep Method: SM6200B PREP Tech: EZA % Moisture: Analyst: EZA Date Prep: 08.08.2020 11:00 Seq Number: 3134037 Parameter Cas Number Result RL MDL Units Analysis Date Flag Dil Dibromochloromethane 124-48-1 84.1 U 200 84.1 ug/L 08.08.2020 15:29 U 200 Dichlorodifluoromethane 75-71-8 74.5 U 100 74.5 ug/L 08.08.2020 15:29 U 200 Diisopropyl ether 108-20-3 71.9 U 100 71.9 ug/L 08.08.2020 15:29 U 200 Ethanol 64-17-5 33200 U 100000 33200 ug/L 08.08.2020 15:29 U 200 Ethylbenzene 100-41-4 1930 100 70.9 ug/L 08.08.2020 15:29 200 isopropylbenzene 98-82-8 72.6 U 100 72.6 ug/L 08.08.2020 15:29 U 200 m,p-Xylenes 179601-23-1 4700 200 143 ug/L 08.08.2020 15:29 200 Methylene Chloride 75-09-2 157 U 200 157 ug/L 08.08.2020 15:29 U 200 Methyl tert-butyl ether (MTBE) 1634-04-4 146 200 39.5 ug/L 08.08.2020 15:29 1 200 Naphthalene 91-20-3 376 500 51.3 ug/L 08.08.2020 15:29 1 200 n-Butylbenzene 104-51-8 68.4 U 100 68.4 ug/L 08.08.2020 15:29 U 200 n-Propylbenzene 103-65-1 114 100 61.4 ug/L 08.08.2020 15:29 200 o-Xylene 95-47-6 2760 200 71.7 ug/L 08.08.2020 15:29 200 p-Cymene (p-Isopropyltoluene) 99-87-6 67.1 U 200 67.1 ug/L 08.08.2020 15:29 U 200 Sec-Butylbenzene 135-98-8 67.2 U 100 67.2 ug/L 08.08.2020 15:29 U 200 Styrene 100-42-5 188 100 70.5 ug/L 08.08.2020 15:29 200 tert-Butylbenzene 98-06-6 66.8 U 200 66.8 ug/L 08.08.2020 15:29 U 200 Tetrachloroethylene 127-18-4 64.5 U 100 64.5 ug/L 08.08.2020 15:29 U 200 Toluene 108-88-3 15300 100 73.1 ug/L 08.08.2020 15:29 200 Total Xylenes 1330-20-7 7460 200 71.7 ug/L 08.08.2020 15:29 200 trans-1,2-dichloroethene 156-60-5 62.1 U 200 62.1 ug/L 08.08.2020 15:29 U 200 trans-1,3-dichloropropene 10061-02-6 73.0 U 200 73.0 ug/L 08.08.2020 15:29 U 200 Trichloroethene 79-01-6 78.6 U 200 78.6 ug/L 08.08.2020 15:29 U 200 Trichlorofluoromethane 75-69-4 71.8 U 100 71.8 ug/L 08.08.2020 15:29 U 200 Vinyl Acetate 108-05-4 376 U 1000 376 ug/L 08.08.2020 15:29 U 200 Vinyl Chloride 75-01-4 76.2 U 100 76.2 ug/L 08.08.2020 15:29 U 200 Surrogate Cas Number % Recovery Units Limits Analysis Date Flag 1,2-Dichloroethane-D4 17060-07-0 100 % 62-126 08.08.2020 15:29 4-Bromofluorobenzene 460-00-4 108 % 70-130 08.08.2020 15:29 Dibromofluoromethane 1868-53-7 103 % 70-130 08.08.2020 15:29 Toluene-138 2037-26-5 100 % 83-116 08.08.2020 15:29 Page 17 of 33 Final 1.000 tiff eurof ins Environment Testing Certificate of Analytical Results 668825 Xenco Terraquest Environmental Consultants, P.C., Mebane, NC NorthGate Shell Sample Id: MW18 Matrix: Ground Water Date Received: 07.3 1.2020 09:30 Lab Sample Id: 668825-006 Date Collected: 07.28.2020 11:10 Analytical Method: VOCs by GC/MS by SM6200B Tech: EZA Analyst: EZA Seq Number: 3134037 Parameter Cas Number Prep Method: SM6200B PREP % Moisture: Date Prep: 08.08.2020 11:00 Result RL MDL Units Analysis Date Flag Dil 1, 1, 1,2-Tetrachloroethane 630-20-6 7.34 U 20.0 7.34 ug/L 08.08.2020 13:03 U 20 1, 1, 1 -Trichloroethane 71-55-6 7.48 U 10.0 7.48 ug/L 08.08.2020 13:03 U 20 1,1,2,2-Tetrachloroethane 79-34-5 7.40 U 10.0 7.40 ug/L 08.08.2020 13:03 U 20 1,1,2-Trichloroethane 79-00-5 8.61 U 20.0 8.61 ug/L 08.08.2020 13:03 U 20 1, 1 -Dichloroethane 75-34-3 7.85 U 20.0 7.85 ug/L 08.08.2020 13:03 U 20 1, 1 -Dichloroethene 75-35-4 7.05 U 20.0 7.05 ug/L 08.08.2020 13:03 U 20 1, 1 -Dichloropropene 563-58-6 6.68 U 10.0 6.68 ug/L 08.08.2020 13:03 U 20 1,2,3-Trichlorobenzene 87-61-6 5.94 U 20.0 5.94 ug/L 08.08.2020 13:03 U 20 1,2,3-Trichloropropane 96-18-4 7.19 U 20.0 7.19 ug/L 08.08.2020 13:03 U 20 1,2,4-Trichlorobenzene 120-82-1 6.49 U 10.0 6.49 ug/L 08.08.2020 13:03 U 20 1,2,4-Trimethylbenzene 95-63-6 9.60 20.0 6.70 ug/L 08.08.2020 13:03 1 20 1,2-Dibromoethane (EDB) 106-93-4 7.51 U 20.0 7.51 ug/L 08.08.2020 13:03 U 20 1,2-Dichlorobenzene 95-50-1 7.49 U 10.0 7.49 ug/L 08.08.2020 13:03 U 20 1,2-Dichloroethane 107-06-2 8.11 U 10.0 8.11 ug/L 08.08.2020 13:03 U 20 1,2-Dichloropropane 78-87-5 7.51 U 20.0 7.51 ug/L 08.08.2020 13:03 U 20 1,3,5-trimethylbenzene 108-67-8 7.03 U 10.0 7.03 ug/L 08.08.2020 13:03 U 20 1,3-Dichlorobenzene 541-73-1 7.20 U 10.0 7.20 ug/L 08.08.2020 13:03 U 20 1,3-Dichloropropane 142-28-9 5.50 U 20.0 5.50 ug/L 08.08.2020 13:03 U 20 1,4-Dichlorobenzene 106-46-7 7.34 U 10.0 7.34 ug/L 08.08.2020 13:03 U 20 2,2-Dichloropropane 594-20-7 6.86 U 10.0 6.86 ug/L 08.08.2020 13:03 U 20 2-Butanone (MEK) 78-93-3 20.6 U 250 20.6 ug/L 08.08.2020 13:03 U 20 2-Chlorotoluene 95-49-8 7.30 U 10.0 7.30 ug/L 08.08.2020 13:03 U 20 2-Hexanone 591-78-6 43.5 U 250 43.5 ug/L 08.08.2020 13:03 U 20 4-Chlorotoluene 106-43-4 6.98 U 10.0 6.98 ug/L 08.08.2020 13:03 U 20 4-Methyl-2-pentanone (MIBK) 108-10-1 44.2 U 250 44.2 ug/L 08.08.2020 13:03 U 20 Acetone 67-64-1 90.6 U 500 90.6 ug/L 08.08.2020 13:03 U 20 Benzene 71-43-2 7.76 U 20.0 7.76 ug/L 08.08.2020 13:03 U 20 Bromobenzene 108-86-1 7.71 U 20.0 7.71 ug/L 08.08.2020 13:03 U 20 Bromochloromethane 74-97-5 7.67 U 20.0 7.67 ug/L 08.08.2020 13:03 U 20 Bromodichloromethane 75-27-4 7.44 U 20.0 7.44 ug/L 08.08.2020 13:03 U 20 Bromoform 75-25-2 8.98 U 20.0 8.98 ug/L 08.08.2020 13:03 U 20 Bromomethane 74-83-9 9.97 U 20.0 9.97 ug/L 08.08.2020 13:03 U 20 Carbon Tetrachloride 56-23-5 7.04 U 10.0 7.04 ug/L 08.08.2020 13:03 U 20 Chlorobenzene 108-90-7 7.33 U 20.0 7.33 ug/L 08.08.2020 13:03 U 20 Chloroethane 75-00-3 7.62 U 10.0 7.62 ug/L 08.08.2020 13:03 U 20 Chloroform 67-66-3 7.63 U 20.0 7.63 ug/L 08.08.2020 13:03 U 20 Chloromethane 74-87-3 7.89 U 20.0 7.89 ug/L 08.08.2020 13:03 U 20 cis-1,2-Dichloroethene 156-59-2 21.0 20.0 7.86 ug/L 08.08.2020 13:03 20 cis- 1,3 -Dichloropropene 10061-01-5 7.86 U 20.0 7.86 ug/L 08.08.2020 13:03 U 20 Page 18 of 33 Final 1.000 tiff eurof ins Environment Testing Certificate of Analytical Results 668825 Xenco Terraquest Environmental Consultants, P.C., Mebane, NC NorthGate Shell Sample Id: MW18 Matrix: Ground Water Date Received: 07.3 1.2020 09:30 Lab Sample Id: 668825-006 Date Collected: 07.28.2020 11:10 Analytical Method: VOCs by GC/MS by SM6200B Tech: EZA Analyst: EZA Seq Number: 3134037 Date Prep: 08.08.2020 11:00 Prep Method: SM6200B PREP % Moisture: Parameter Cas Number Result RL MDL Units Analysis Date Flag Dil Dibromochloromethane 124-48-1 8.41 U 20.0 8.41 ug/L 08.08.2020 13:03 U Dichlorodifluoromethane 75-71-8 7.45 U 10.0 7.45 ug/L 08.08.2020 13:03 U Diisopropyl ether 108-20-3 14.8 10.0 7.19 ug/L 08.08.2020 13:03 Ethanol 64-17-5 3320 U 10000 3320 ug/L 08.08.2020 13:03 U Ethylbenzene 100-41-4 97.2 10.0 7.09 ug/L 08.08.2020 13:03 isopropylbenzene 98-82-8 16.2 10.0 7.26 ug/L 08.08.2020 13:03 m,p-Xylenes 179601-23-1 14.3 U 20.0 14.3 ug/L 08.08.2020 13:03 U Methylene Chloride 75-09-2 15.7 U 20.0 15.7 ug/L 08.08.2020 13:03 U Methyl tert-butyl ether (MTBE) 1634-04-4 1100 20.0 3.95 ug/L 08.08.2020 13:03 Naphthalene 91-20-3 5.13 U 50.0 5.13 ug/L 08.08.2020 13:03 U n-Butylbenzene 104-51-8 6.84 U 10.0 6.84 ug/L 08.08.2020 13:03 U n-Propylbenzene 103-65-1 26.4 10.0 6.14 ug/L 08.08.2020 13:03 o-Xylene 95-47-6 7.17 U 20.0 7.17 ug/L 08.08.2020 13:03 U p-Cymene (p-Isopropyltoluene) 99-87-6 6.71 U 20.0 6.71 ug/L 08.08.2020 13:03 U Sec-Butylbenzene 135-98-8 6.72 U 10.0 6.72 ug/L 08.08.2020 13:03 U Styrene 100-42-5 7.05 U 10.0 7.05 ug/L 08.08.2020 13:03 U tert-Butylbenzene 98-06-6 6.68 U 20.0 6.68 ug/L 08.08.2020 13:03 U Tetrachloroethylene 127-18-4 149 10.0 6.45 ug/L 08.08.2020 13:03 Toluene 108-88-3 7.31 U 10.0 7.31 ug/L 08.08.2020 13:03 U Total Xylenes 1330-20-7 7.17 U 20 7.17 ug/L 08.08.2020 13:03 U trans-1,2-dichloroethene 156-60-5 6.21 U 20.0 6.21 ug/L 08.08.2020 13:03 U trans-1,3-dichloropropene 10061-02-6 7.30 U 20.0 7.30 ug/L 08.08.2020 13:03 U Trichloroethene 79-01-6 10.4 20.0 7.86 ug/L 08.08.2020 13:03 1 Trichlorofluoromethane 75-69-4 7.18 U 10.0 7.18 ug/L 08.08.2020 13:03 U Vinyl Acetate 108-05-4 37.6 U 100 37.6 ug/L 08.08.2020 13:03 U Vinyl Chloride 75-01-4 58.4 10.0 7.62 ug/L 08.08.2020 13:03 Surrogate Cas Number % Recovery Units Limits Analysis Date Flag 1,2-Dichloroethane-D4 17060-07-0 99 % 62-126 08.08.2020 13:03 4-Bromofluorobenzene 460-00-4 104 % 70-130 08.08.2020 13:03 Dibromofluoromethane 1868-53-7 104 % 70-130 08.08.2020 13:03 Toluene-D8 2037-26-5 100 % 83-116 08.08.2020 13:03 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 Page 19 of 33 Final 1.000 tiff eurof ins Environment Testing Certificate of Analytical Results 668825 Xenco Terraquest Environmental Consultants, P.C., Mebane, NC NorthGate Shell Sample Id: MW20 Matrix: Ground Water Date Received: 07.3 1.2020 09:30 Lab Sample Id: 668825-007 Date Collected: 07.28.2020 10:48 Analytical Method: VOCs by GC/MS by SM6200B Tech: EZA Analyst: EZA Seq Number: 3134037 Parameter Cas Number Prep Method: SM6200B PREP % Moisture: Date Prep: 08.08.2020 11:00 Result RL MDL Units Analysis Date Flag Dil 1, 1, 1,2-Tetrachloroethane 630-20-6 183 U 500 183 ug/L 08.08.2020 15:50 U 500 1, 1, 1 -Trichloroethane 71-55-6 187 U 250 187 ug/L 08.08.2020 15:50 U 500 1,1,2,2-Tetrachloroethane 79-34-5 185 U 250 185 ug/L 08.08.2020 15:50 U 500 1,1,2-Trichloroethane 79-00-5 215 U 500 215 ug/L, 08.08.2020 15:50 U 500 1, 1 -Dichloroethane 75-34-3 196 U 500 196 ug/L 08.08.2020 15:50 U 500 1, 1 -Dichloroethene 75-35-4 176 U 500 176 ug/L 08.08.2020 15:50 U 500 1, 1 -Dichloropropene 563-58-6 167 U 250 167 ug/L 08.08.2020 15:50 U 500 1,2,3-Trichlorobenzene 87-61-6 149 U 500 149 ug/L 08.08.2020 15:50 U 500 1,2,3-Trichloropropane 96-18-4 180 U 500 180 ug/L 08.08.2020 15:50 U 500 1,2,4-Trichlorobenzene 120-82-1 162 U 250 162 ug/L 08.08.2020 15:50 U 500 1,2,4-Trimethylbenzene 95-63-6 1900 500 168 ug/L 08.08.2020 15:50 500 1,2-Dibromoethane (EDB) 106-93-4 188 U 500 188 ug/L 08.08.2020 15:50 U 500 1,2-Dichlorobenzene 95-50-1 187 U 250 187 ug/L 08.08.2020 15:50 U 500 1,2-Dichloroethane 107-06-2 203 U 250 203 ug/L 08.08.2020 15:50 U 500 1,2-Dichloropropane 78-87-5 188 U 500 188 ug/L 08.08.2020 15:50 U 500 1,3,5-trimethylbenzene 108-67-8 505 250 176 ug/L 08.08.2020 15:50 500 1,3-Dichlorobenzene 541-73-1 180 U 250 180 ug/L, 08.08.2020 15:50 U 500 1,3-Dichloropropane 142-28-9 138 U 500 138 ug/L, 08.08.2020 15:50 U 500 1,4-Dichlorobenzene 106-46-7 183 U 250 183 ug/L 08.08.2020 15:50 U 500 2,2-Dichloropropane 594-20-7 171 U 250 171 ug/L 08.08.2020 15:50 U 500 2-Butanone (MEK) 78-93-3 515 U 6250 515 ug/L 08.08.2020 15:50 U 500 2-Chlorotoluene 95-49-8 183 U 250 183 ug/L 08.08.2020 15:50 U 500 2-Hexanone 591-78-6 1090 U 6250 1090 ug/L 08.08.2020 15:50 U 500 4-Chlorotoluene 106-43-4 175 U 250 175 ug/L 08.08.2020 15:50 U 500 4-Methyl-2-pentanone (MIBK) 108-10-1 1110 U 6250 1110 ug/L 08.08.2020 15:50 U 500 Acetone 67-64-1 2270 U 12500 2270 ug/L 08.08.2020 15:50 U 500 Benzene 71-43-2 9950 500 194 ug/L 08.08.2020 15:50 500 Bromobenzene 108-86-1 193 U 500 193 ug/L 08.08.2020 15:50 U 500 Bromochloromethane 74-97-5 192 U 500 192 ug/L 08.08.2020 15:50 U 500 Bromodichloromethane 75-27-4 186 U 500 186 ug/L 08.08.2020 15:50 U 500 Bromoform 75-25-2 224 U 500 224 ug/L, 08.08.2020 15:50 U 500 Bromomethane 74-83-9 249 U 500 249 ug/L 08.08.2020 15:50 U 500 Carbon Tetrachloride 56-23-5 176 U 250 176 ug/L 08.08.2020 15:50 U 500 Chlorobenzene 108-90-7 183 U 500 183 ug/L 08.08.2020 15:50 U 500 Chloroethane 75-00-3 190 U 250 190 ug/L 08.08.2020 15:50 U 500 Chloroform 67-66-3 191 U 500 191 ug/L 08.08.2020 15:50 U 500 Chloromethane 74-87-3 197 U 500 197 ug/L 08.08.2020 15:50 U 500 cis-1,2-Dichloroethene 156-59-2 197 U 500 197 ug/L 08.08.2020 15:50 U 500 cis- 1,3 -Dichloropropene 10061-01-5 197 U 500 197 ug/L 08.08.2020 15:50 U 500 Page 20 of 33 Final 1.000 tiff eurof ins Environment Testing Certificate of Analytical Results 668825 Xenco Terraquest Environmental Consultants, P.C., Mebane, NC NorthGate Shell Sample Id: MW20 Matrix: Ground Water Date Received: 07.3 1.2020 09:30 Lab Sample Id: 668825-007 Date Collected: 07.28.2020 10:48 Analytical Method: VOCs by GC/MS by SM6200B Tech: EZA Analyst: EZA Seq Number: 3134037 Date Prep: 08.08.2020 11:00 Prep Method: SM6200B PREP % Moisture: Parameter Cas Number Result RI, MDL Units Analysis Date Flag Dil Dibromochloromethane 124-48-1 210 U 500 210 ug/L 08.08.2020 15:50 U Dichlorodifluoromethane 75-71-8 186 U 250 186 ug/L 08.08.2020 15:50 U Diisopropyl ether 108-20-3 700 250 180 ug/L 08.08.2020 15:50 Ethanol 64-17-5 83100 U 250000 83100 ug/L 08.08.2020 15:50 U Ethylbenzene 100-41-4 2760 250 177 ug/L 08.08.2020 15:50 isopropylbenzene 98-82-8 182 U 250 182 ug/L 08.08.2020 15:50 U m,p-Xylenes 179601-23-1 7840 500 359 ug/L 08.08.2020 15:50 Methylene Chloride 75-09-2 393 U 500 393 ug/L 08.08.2020 15:50 U Methyl tert-butyl ether (MTBE) 1634-04-4 195 500 98.8 ug/L 08.08.2020 15:50 1 Naphthalene 91-20-3 635 1250 128 ug/L 08.08.2020 15:50 1 n-Butylbenzene 104-51-8 171 U 250 171 ug/L 08.08.2020 15:50 U n-Propylbenzene 103-65-1 370 250 153 ug/L 08.08.2020 15:50 o-Xylene 95-47-6 3760 500 179 ug/L 08.08.2020 15:50 p-Cymene (p-Isopropyltoluene) 99-87-6 168 U 500 168 ug/L 08.08.2020 15:50 U Sec-Butylbenzene 135-98-8 168 U 250 168 ug/L 08.08.2020 15:50 U Styrene 100-42-5 645 250 176 ug/L 08.08.2020 15:50 tert-Butylbenzene 98-06-6 167 U 500 167 ug/L 08.08.2020 15:50 U Tetrachloroethylene 127-18-4 161 U 250 161 ug/L 08.08.2020 15:50 U Toluene 108-88-3 21300 250 183 ug/L 08.08.2020 15:50 Total Xylenes 1330-20-7 11600 500 179 ug/L 08.08.2020 15:50 trans-1,2-dichloroethene 156-60-5 155 U 500 155 ug/L 08.08.2020 15:50 U trans-1,3-dichloropropene 10061-02-6 183 U 500 183 ug/L 08.08.2020 15:50 U Trichloroethene 79-01-6 197 U 500 197 ug/L 08.08.2020 15:50 U Trichlorofluoromethane 75-69-4 180 U 250 180 ug/L 08.08.2020 15:50 U Vinyl Acetate 108-05-4 941 U 2500 941 ug/L 08.08.2020 15:50 U Vinyl Chloride 75-01-4 191 U 250 191 ug/L 08.08.2020 15:50 U Surrogate Cas Number % Recovery Units Limits Analysis Date Flag 1,2-Dichloroethane-D4 17060-07-0 98 % 62-126 08.08.2020 15:50 4-Bromofluorobenzene 460-00-4 107 % 70-130 08.08.2020 15:50 Dibromofluoromethane 1868-53-7 102 % 70-130 08.08.2020 15:50 Toluene-D8 2037-26-5 99 % 83-116 08.08.2020 15:50 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 500 Page 21 of 33 Final 1.000 tiff eu rof ins Environment resting Xenco Flagging Criteria X In our quality control review of the data a QC deficiency was observed and flagged as noted. MS/MSD recoveries were found to be outside of the laboratory control limits due to possible matrix /chemical interference, or a concentration of target analyte high enough to affect the recovery of the spike concentration. This condition could also affect the relative percent difference in the MS/MSD. B A target analyte or common laboratory contaminant was identified in the method blank. Its presence indicates possible field or laboratory contamination. D The sample(s) were diluted due to targets detected over the highest point of the calibration curve, or due to matrix interference. Dilution factors are included in the final results. The result is from a diluted sample. E The data exceeds the upper calibration limit; therefore, the concentration is reported as estimated. F RPD exceeded lab control limits. J The target analyte was positively identified below the quantitation limit and above the detection limit. U Analyte was not detected. L The LCS data for this analytical batch was reported below the laboratory control limits for this analyte. The department supervisor and QA Director reviewed data. The samples were either reanalyzed or flagged as estimated concentrations. H The LCS data for this analytical batch was reported above the laboratory control limits. Supporting QC Data were reviewed by the Department Supervisor and QA Director. Data were determined to be valid for reporting. K Sample analyzed outside of recommended hold time. JN A combination of the "N" and the " Y qualifier. The analysis indicates that the analyte is "tentatively identified" and the associated numerical value may not be consistent with the amount actually present in the environmental sample. ** Surrogate recovered outside laboratory control limit. BRL Below Reporting Limit. ND Not Detected. RL Reporting Limit MDL Method Detection Limit SDL Sample Detection Limit LOD Limit of Detection PQL Practical Quantitation Limit MQL Method Quantitation Limit LOQ Limit of Quantitation DL Method Detection Limit NC Non -Calculable SMP Client Sample BLK Method Blank BKS/LCS Blank Spike/Laboratory Control Sample BKSD/LCSD Blank Spike Duplicate/Laboratory Control Sample Duplicate MD/SD Method Duplicate/Sample Duplicate MS Matrix Spike + NELAC certification not offered for this compound. * (Next to analyte name or method description) = Outside XENCO's scope of NELAC accreditation MSD: Matrix Spike Duplicate Page 22 of 33 Final 1.000 tiff etirof ins QC Summary 668825 Environment Testing Xenco Analytical Method: Seq Number: MB Sample Id: Parameter Terraquest Environmental Consultants, P.C. NorthGate Shell VOCs by GUMS by SM6200B 3134037 Matrix: Water 7709070-1-BLK LCS Sample Id: 7709070-1-BKS 1, 1, 1,2-Tetrachloroethane 1, 1, 1 -Trichloroethane 1,1,2,2-Tetrachloroethane 1,1,2-Trichloroethane 1, 1 -Dichloroethane 1, 1 -Dichloroethene 1, 1 -Dichloropropene 1,2,3-Trichlorobenzene 1,2,3-Trichloropropane 1,2,4-Trichlorobenzene 1,2,4-Trimethylbenzene 1,2-Dibromoethane (EDB) 1,2-Dichlorobenzene 1,2-Dichloroethane 1,2-Dichloropropane 1,3,5-trimethylbenzene 1,3-Dichlorobenzene 1,3-Dichloropropane 1,4-Dichlorobenzene 2,2-Dichloropropane 2-Butanone (MEK) 2-Chlorotoluene 2-Hexanone 4-Chlorotoluene 4-Methyl-2-pentanone (MIBK) Acetone Benzene Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane Carbon Tetrachloride Chlorobenzene Chloroethane Chloroform Chloromethane cis-1,2-Dichloroethene cis-1,3-Dichloropropene Dibromochloromethane Dichlorodifluoromethane Diisopropyl ether Ethanol Ethylbenzene isopropylbenzene m,p-Xylenes Methylene Chloride Methyl tert-butyl ether (MTBE) Naphthalene n-Butylbenzene MS/MSD Percent Recovery Relative Percent Difference LCS/LCSD Recovery Log Difference MB Spike LCS LCS LCSD LCSD Result Amount Result %Rec Result %Rec <0.367 25.0 27.3 109 27.7 ill <0.374 25.0 30.1 120 30.3 121 <0.370 25.0 27.0 108 28.0 112 <0.431 25.0 26.3 105 26.7 107 <0.392 25.0 28.2 113 28.9 116 <0.352 25.0 28.9 116 28.5 114 <0.334 25.0 29.8 119 30.1 120 <0.297 25.0 27.2 109 28.8 115 <0.359 25.0 26.1 104 26.8 107 <0.325 25.0 26.6 106 28.1 112 <0.335 25.0 29.4 118 29.3 117 <0.376 25.0 26.1 104 27.9 112 <0.375 25.0 26.8 107 27.4 110 <0.405 25.0 27.8 ill 28.9 116 <0.376 25.0 28.4 114 29.1 116 <0.352 25.0 29.5 118 29.4 118 <0.360 25.0 27.7 ill 28.4 114 <0.275 25.0 26.8 107 28.4 114 <0.367 25.0 27.1 108 27.5 110 <0.343 25.0 30.2 121 30.5 122 <1.03 125 118 94 123 98 <0.365 25.0 29.7 119 29.3 117 <2.17 125 116 93 118 94 <0.349 25.0 29.1 116 29.4 118 <2.21 125 114 91 124 99 <4.53 125 ill 89 110 88 <0.388 25.0 28.6 114 28.8 115 <0.386 25.0 27.2 109 28.0 112 <0.384 25.0 26.8 107 28.0 112 <0.372 25.0 29.0 116 30.4 122 <0.449 25.0 26.4 106 28.3 113 <0.498 25.0 21.8 87 23.0 92 <0.352 25.0 30.9 124 30.8 123 <0.367 25.0 27.4 110 27.8 ill <0.381 25.0 27.2 109 27.1 108 <0.382 25.0 28.0 112 28.7 115 <0.395 25.0 22.3 89 23.0 92 <0.393 25.0 28.3 113 28.8 115 <0.393 25.0 28.4 114 29.4 118 <0.420 25.0 27.9 112 28.6 114 <0.372 25.0 27.5 110 27.2 109 <0.359 25.0 27.8 ill 28.9 116 <166 1000 932 93 1010 101 <0.355 25.0 28.3 113 28.5 114 <0.363 25.0 28.7 115 29.0 116 <0.717 50.0 55.8 112 56.8 114 <0.786 25.0 25.3 101 26.3 105 <0.198 25.0 24.7 99 26.0 104 <0.256 25.0 25.7 103 27.5 110 <0.342 25.0 29.6 118 29.5 118 [D] = 100*(C-A) / B RPD = 200* I (C-E) / (C+E) [D] = 100 * (C) / [B] Log Diff. = Log(Sample Duplicate) - Log(Original Sample) Prep Method: SM620OB_PREP Date Prep: 08.08.2020 LCSD Sample Id: 7709070-1-BSD Limits %RPD RPD Units Analysis Flag Limit Date 76-126 1 20 119/1- 08.08.202010:17 63-128 1 20 ug/L 08.08.202010:17 79-133 4 20 ug/L 08.08.202010:17 82-126 2 20 119/1- 08.08.202010:17 77-120 2 20 ug/L 08.08.202010:17 67-123 1 20 ug/L 08.08.202010:17 76-126 1 20 119/1- 08.08.202010:17 41-136 6 20 ug/L 08.08.202010:17 77-125 3 20 ug/L 08.08.202010:17 41-132 5 20 119/1- 08.08.202010:17 53-141 0 20 119/1- 08.08.202010:17 82-130 7 20 ug/L 08.08.202010:17 83-128 2 20 ug/L 08.08.202010:17 59-134 4 20 119/1- 08.08.202010:17 79-125 2 20 ug/L 08.08.202010:17 69-125 0 20 ug/L 08.08.202010:17 83-126 2 20 119/1- 08.08.202010:17 85-124 6 20 ug/L 08.08.202010:17 82-121 1 20 ug/L 08.08.202010:17 56-122 1 20 119/1- 08.08.202010:17 66-136 4 20 ug/L 08.08.202010:17 73-129 1 20 ug/L 08.08.202010:17 63-140 2 20 119/1- 08.08.202010:17 76-129 1 20 119/1- 08.08.202010:17 73-126 8 20 ug/L 08.08.202010:17 47-138 1 20 ug/L 08.08.202010:17 70-135 1 20 119/1- 08.08.202010:17 76-120 3 20 ug/L 08.08.202010:17 83-132 4 20 ug/L 08.08.202010:17 66-132 5 20 119/1- 08.08.202010:17 63-143 7 20 ug/L 08.08.202010:17 60-134 5 20 ug/L 08.08.202010:17 59-139 0 20 119/1- 08.08.202010:17 83-120 1 20 ug/L 08.08.202010:17 67-125 0 20 ug/L 08.08.202010:17 72-120 2 20 ug/L 08.08.202010:17 59-128 3 20 119/1- 08.08.202010:17 80-125 2 20 ug/L 08.08.202010:17 74-122 3 20 ug/L 08.08.202010:17 70-130 2 20 119/1- 08.08.202010:17 48-138 1 20 ug/L 08.08.202010:17 77-125 4 20 ug/L 08.08.202010:17 55-133 8 20 119/1- 08.08.202010:17 70-140 1 20 ug/L 08.08.202010:17 70-130 1 20 ug/L 08.08.202010:17 65-151 2 20 119/1- 08.08.202010:17 70-130 4 20 119/1- 08.08.202010:17 51-155 5 20 ug/L 08.08.202010:17 34-135 7 20 119/1- 08.08.202010:17 73-128 0 20 119/1- 08.08.202010:17 LCS = Laboratory Control Sample MS = Matrix Spike A = Parent Result B = Spike Added C = MS/LCS Result D = MSD/LCSD % Rec E = MSD/LCSD Result Page 23 of 33 Final 1.000 tiff eu rof ins Environment resting 1lenco QC Summary 668825 Terraquest Environmental Consultants, P.C. NorthGate Shell Analytical Method: VOCs by GC/MS by SM6200B Prep Method: SM620OB_PREP Seq Number: 3134037 Matrix: Water Date Prep: 08.08.2020 MB Sample Id: 7709070-1-BLK LCS Sample Id: 7709070-1-BKS LCSD Sample Id: 7709070-1-BSD Parameter MB Spike LCS LCS LCSD LCSD Limits %RPD RPD Units Analysis Fla g Result Amount Result %Rec Result %Rec Limit Date n-Propylbenzene <0.307 25.0 29.6 118 29.2 117 75-125 1 20 ug/L 08.08.2020 10:17 o-Xylene <0.359 25.0 27.3 109 27.8 111 58-148 2 20 ug/L 08.08.2020 10:17 p-Cymene (p-Isopropyltoluene) <0.336 25.0 29.8 119 29.2 117 70-130 2 20 ug/L 08.08.2020 10:17 Sec-Butylbenzene <0.336 25.0 30.1 120 29.5 118 77-122 2 20 ug/L 08.08.2020 10:17 Styrene <0.353 25.0 26.8 107 27.2 109 54-137 1 20 ug/L 08.08.2020 10:17 tert-Butylbenzene <0.334 25.0 29.9 120 29.5 118 74-124 1 20 ug/L 08.08.2020 10:17 Tetrachloroethylene <0.322 25.0 28.2 113 28.2 113 57-130 0 20 ug/L 08.08.2020 10:17 Toluene <0.366 25.0 28.0 112 28.2 113 81-125 1 20 119/1- 08.08.2020 10:17 trans-1,2-dichloroethene <0.311 25.0 27.5 110 28.1 112 69-122 2 20 ug/L 08.08.2020 10:17 trans-1,3-dichloropropene <0.365 25.0 26.9 108 28.2 113 73-129 5 20 ug/L 08.08.2020 10:17 Trichloroethene <0.393 25.0 29.8 119 30.0 120 73-124 1 20 119/1- 08.08.2020 10:17 Trichlorofluoromethane <0.359 25.0 29.7 119 29.9 120 49-139 1 20 ug/L 08.08.2020 10:17 Vinyl Acetate <1.88 125 120 96 127 102 57-134 6 20 119/1- 08.08.2020 10:17 Vinyl Chloride <0.381 25.0 27.9 112 27.8 Ill 60-140 0 20 ug/L 08.08.2020 10:17 Surrogate MB MB LCS LCS LCSD LCSD Limits Units Analysis %Rec Flag %Rec Flag %Rec Flag Date 1,2-Dichloroethane-D4 98 102 104 62-126 % 08.08.2020 10:17 4-Bromofluorobenzene 104 103 101 70-130 % 08.08.2020 10:17 Dibromofluoromethane 104 100 101 70-130 % 08.08.2020 10:17 Toluene-138 99 100 100 83-116 % 08.08.2020 10:17 MS/MSD Percent Recovery [D] = 100*(C-A) / B Relative Percent Difference RPD = 200* I (C-E) / (C+E) LCS/LCSD Recovery [D] = 100 * (C) / [B] Log Difference Log Diff. = Log(Sample Duplicate) - Log(Original Sample) LCS = Laboratory Control Sample A = Parent Result C = MS/LCS Result E = MSD/LCSD Result MS = Matrix Spike B = Spike Added D = MSD/LCSD % Rec Page 24 of 33 Final 1.000 tiff etirof ins QC Summary 668825 Environment Testing Xenco Analytical Method: Seq Number: MB Sample Id: Parameter Terraquest Environmental Consultants, P.C. NorthGate Shell VOCs by GUMS by SM6200B 3134076 Matrix: Water 7709102-1-BLK LCS Sample Id: 7709102-1-BKS 1, 1, 1,2-Tetrachloroethane 1, 1, 1 -Trichloroethane 1,1,2,2-Tetrachloroethane 1,1,2-Trichloroethane 1, 1 -Dichloroethane 1, 1 -Dichloroethene 1, 1 -Dichloropropene 1,2,3-Trichlorobenzene 1,2,3-Trichloropropane 1,2,4-Trichlorobenzene 1,2,4-Trimethylbenzene 1,2-Dibromoethane (EDB) 1,2-Dichlorobenzene 1,2-Dichloroethane 1,2-Dichloropropane 1,3,5-trimethylbenzene 1,3-Dichlorobenzene 1,3-Dichloropropane 1,4-Dichlorobenzene 2,2-Dichloropropane 2-Butanone (MEK) 2-Chlorotoluene 2-Hexanone 4-Chlorotoluene 4-Methyl-2-pentanone (MIBK) Acetone Benzene Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane Carbon Tetrachloride Chlorobenzene Chloroethane Chloroform Chloromethane cis-1,2-Dichloroethene cis-1,3-Dichloropropene Dibromochloromethane Dichlorodifluoromethane Diisopropyl ether Ethanol Ethylbenzene isopropylbenzene m,p-Xylenes Methylene Chloride Methyl tert-butyl ether (MTBE) Naphthalene n-Butylbenzene MS/MSD Percent Recovery Relative Percent Difference LCS/LCSD Recovery Log Difference MB Spike LCS LCS LCSD LCSD Result Amount Result %Rec Result %Rec <0.367 25.0 26.4 106 25.8 103 <0.374 25.0 29.8 119 28.7 115 <0.370 25.0 26.7 107 26.1 104 <0.431 25.0 24.9 100 24.6 98 <0.392 25.0 28.6 114 28.1 112 <0.352 25.0 27.7 111 25.4 102 <0.334 25.0 29.4 118 27.6 110 <0.297 25.0 26.0 104 26.3 105 <0.359 25.0 26.4 106 25.4 102 <0.325 25.0 26.0 104 24.9 100 <0.335 25.0 28.5 114 26.8 107 <0.376 25.0 24.9 100 24.8 99 <0.375 25.0 26.2 105 25.0 100 <0.405 25.0 27.0 108 26.8 107 <0.376 25.0 27.7 ill 27.3 109 <0.352 25.0 29.0 116 26.9 108 <0.360 25.0 27.0 108 25.5 102 <0.275 25.0 25.8 103 25.8 103 <0.367 25.0 26.7 107 25.1 100 <0.343 25.0 30.4 122 29.2 117 <1.03 125 126 101 132 106 <0.365 25.0 28.9 116 27.1 108 <2.17 125 119 95 128 102 <0.349 25.0 29.1 116 27.4 110 <2.21 125 114 91 120 96 <4.53 125 113 90 119 95 <0.388 25.0 27.5 110 26.4 106 <0.386 25.0 27.0 108 25.4 102 <0.384 25.0 26.3 105 26.0 104 <0.372 25.0 28.7 115 28.4 114 <0.449 25.0 25.2 101 24.7 99 <0.498 25.0 22.6 90 21.9 88 <0.352 25.0 29.9 120 28.3 113 <0.367 25.0 25.7 103 25.3 101 <0.381 25.0 25.6 102 24.9 100 <0.382 25.0 28.2 113 28.0 112 <0.395 25.0 21.3 85 21.2 85 <0.393 25.0 27.8 ill 27.3 109 <0.393 25.0 27.5 110 26.9 108 <0.420 25.0 26.1 104 26.0 104 <0.372 25.0 24.5 98 20.5 82 <0.359 25.0 27.9 112 28.1 112 <166 1000 932 93 892 89 <0.355 25.0 26.7 107 25.9 104 <0.363 25.0 26.7 107 25.8 103 <0.717 50.0 52.2 104 50.9 102 <0.786 25.0 24.2 97 24.3 97 <0.198 25.0 25.0 100 24.8 99 <0.256 25.0 25.0 100 25.0 100 <0.342 25.0 29.3 117 26.8 107 [D] = 100*(C-A) / B RPD = 200* I (C-E) / (C+E) [D] = 100 * (C) / [B] Log Diff. = Log(Sample Duplicate) - Log(Original Sample) Prep Method: SM620OB_PREP Date Prep: 08.10.2020 LCSD Sample Id: 7709102-1-BSD Limits %RPD RPD Units Analysis Flag Limit Date 76-126 2 20 119/1- 08.10.202018:34 63-128 4 20 ug/L 08.10.202018:34 79-133 2 20 119/1- 08.10.202018:34 82-126 1 20 119/1- 08.10.202018:34 77-120 2 20 ug/L 08.10.202018:34 67-123 9 20 ug/L 08.10.202018:34 76-126 6 20 119/1- 08.10.202018:34 41-136 1 20 ug/L 08.10.202018:34 77-125 4 20 ug/L 08.10.202018:34 41-132 4 20 119/1- 08.10.202018:34 53-141 6 20 119/1- 08.10.202018:34 82-130 0 20 ug/L 08.10.202018:34 83-128 5 20 ug/L 08.10.202018:34 59-134 1 20 119/1- 08.10.202018:34 79-125 1 20 ug/L 08.10.202018:34 69-125 8 20 ug/L 08.10.202018:34 83-126 6 20 119/1- 08.10.202018:34 85-124 0 20 ug/L 08.10.202018:34 82-121 6 20 ug/L 08.10.202018:34 56-122 4 20 119/1- 08.10.202018:34 66-136 5 20 ug/L 08.10.202018:34 73-129 6 20 ug/L 08.10.202018:34 63-140 7 20 119/1- 08.10.202018:34 76-129 6 20 119/1- 08.10.202018:34 73-126 5 20 ug/L 08.10.202018:34 47-138 5 20 ug/L 08.10.202018:34 70-135 4 20 119/1- 08.10.202018:34 76-120 6 20 ug/L 08.10.202018:34 83-132 1 20 119/1- 08.10.202018:34 66-132 1 20 119/1- 08.10.202018:34 63-143 2 20 ug/L 08.10.202018:34 60-134 3 20 ug/L 08.10.202018:34 59-139 5 20 119/1- 08.10.202018:34 83-120 2 20 ug/L 08.10.202018:34 67-125 3 20 ug/L 08.10.202018:34 72-120 1 20 ug/L 08.10.202018:34 59-128 0 20 119/1- 08.10.202018:34 80-125 2 20 ug/L 08.10.202018:34 74-122 2 20 119/1- 08.10.202018:34 70-130 0 20 119/1- 08.10.202018:34 48-138 18 20 ug/L 08.10.202018:34 77-125 1 20 ug/L 08.10.202018:34 55-133 4 20 119/1- 08.10.202018:34 70-140 3 20 ug/L 08.10.202018:34 70-130 3 20 ug/L 08.10.202018:34 65-151 3 20 119/1- 08.10.202018:34 70-130 0 20 119/1- 08.10.202018:34 51-155 1 20 ug/L 08.10.202018:34 34-135 0 20 119/1- 08.10.202018:34 73-128 9 20 119/1- 08.10.202018:34 LCS = Laboratory Control Sample MS = Matrix Spike A = Parent Result B = Spike Added C = MS/LCS Result D = MSD/LCSD % Rec E = MSD/LCSD Result Page 25 of 33 Final 1.000 QC Summary 668825 tiff eurof ins Environment Testing 1lenco Terraquest Environmental Consultants, P.C. NorthGate Shell Analytical Method: VOCs by GC/MS by SM6200B Prep Method: SM620OB_PREP Seq Number: 3134076 Matrix: Water Date Prep: 08.10.2020 MB Sample Id: 7709102-1-BLK LCS Sample Id: 7709102-1-BKS LCSD Sample Id: 7709102-1-BSD Parameter MB Spike LCS LCS LCSD LCSD Limits %RPD RPD Units Analysis Fla g Result Amount Result %Rec Result %Rec Limit Date n-Propylbenzene <0.307 25.0 29.0 116 26.7 107 75-125 8 20 ug/L 08.10.2020 18:34 o-Xylene <0.359 25.0 25.6 102 25.1 100 58-148 2 20 ug/L 08.10.2020 18:34 p-Cymene (p-Isopropyltoluene) <0.336 25.0 29.1 116 26.8 107 70-130 8 20 ug/L 08.10.2020 18:34 Sec-Butylbenzene <0.336 25.0 29.5 118 27.1 108 77-122 8 20 ug/L 08.10.2020 18:34 Styrene <0.353 25.0 25.0 100 24.7 99 54-137 1 20 ug/L 08.10.2020 18:34 tert-Butylbenzene <0.334 25.0 29.4 118 27.1 108 74-124 8 20 ug/L 08.10.2020 18:34 Tetrachloroethylene <0.322 25.0 26.1 104 24.6 98 57-130 6 20 ug/L 08.10.2020 18:34 Toluene <0.366 25.0 26.1 104 25.7 103 81-125 2 20 ug/L 08.10.2020 18:34 trans-1,2-dichloroethene <0.311 25.0 27.0 108 26.0 104 69-122 4 20 ug/L 08.10.2020 18:34 trans-1,3-dichloropropene <0.365 25.0 26.1 104 25.7 103 73-129 2 20 ug/L 08.10.2020 18:34 Trichloroethene <0.393 25.0 28.4 114 27.0 108 73-124 5 20 ug/L 08.10.2020 18:34 Trichlorofluoromethane <0.359 25.0 28.6 114 25.4 102 49-139 12 20 ug/L 08.10.2020 18:34 Vinyl Acetate <1.88 125 120 96 121 97 57-134 1 20 ug/L 08.10.2020 18:34 Vinyl Chloride <0.381 25.0 26.1 104 24.5 98 60-140 6 20 ug/L 08.10.2020 18:34 Surrogate MB MB LCS LCS LCSD LCSD Limits Units Analysis %Rec Flag %Rec Flag %Rec Flag Date 1,2-Dichloroethane-D4 98 103 106 62-126 % 08.10.2020 18:34 4-Bromofluorobenzene 107 107 105 70-130 % 08.10.2020 18:34 Dibromofluoromethane 105 104 106 70-130 % 08.10.2020 18:34 Toluene-138 98 100 99 83-116 % 08.10.2020 18:34 Analytical Method: VOCs by GC/MS by SM6200B Prep Method: SM620OB_PREP Seq Number: 3134171 Matrix: Water Date Prep: 08.11.2020 MB Sample Id: 7709187-1-BLK LCS Sample Id: 7709187-1-BKS LCSD Sample Id: 7709187-1-BSD Parameter MB Spike LCS LCS LCSD LCSD Limits %RPD RPD Units Analysis Fla g Result Amount Result %Rec Result %Rec Limit Date Dichlorodifluoromethane <0.372 25.0 25.7 103 26.8 107 48-138 4 20 ug/L 08.11.202011:07 m,p-Xylenes <0.717 50.0 53.9 108 58.1 116 65-151 8 20 ug/L 08.11.202011:07 o-Xylene <0.359 25.0 26.8 107 28.4 114 58-148 6 20 ug/L 08.11.202011:07 MB MB LCS LCS LCSD LCSD Limits Units Analysis Surrogate %Rec Fla g %Rec Flag ° %Rec Flag Date 1,2-Dichloroethane-D4 98 100 104 62-126 % 08.11.202011:07 4-Bromofluorobenzene 108 106 106 70-130 % 08.11.202011:07 Dibromofluoromethane 105 105 104 70-130 % 08.11.202011:07 Toluene-D8 100 100 98 83-116 % 08.11.202011:07 MS/MSD Percent Recovery [D] = 100*(C-A) / B LCS = Laboratory Control Sample MS = Matrix Spike Relative Percent Difference RPD = 200* I (C-E) / (C+E) A = Parent Result B = Spike Added LCS/LCSD Recovery [D] = 100 * (C) / [B] C = MS/LCS Result D = MSD/LCSD % Rec Log Difference Log Diff. = Log(Sample Duplicate) - Log(Original Sample) E = MSD/LCSD Result Page 26 of 33 Final 1.000 tiff etirof ins Environment resting 1lenco QC Summary 668825 Terraquest Environmental Consultants, P.C. NorthGate Shell Analytical Method: VOCs by GC/MS by SM6200B Prep Method: SM620OB_PREP Seq Number: 3134037 Matrix: Ground Water Date Prep: 08.08.2020 Parent Sample Id: 668826-006 MS Sample Id: 668826-006 S Parameter Parent Spike MS MS Limits Units Analysis Flag Result Amount Result %Rec Date 1, 1, 1,2-Tetrachloroethane <0.367 25.0 27.2 109 76-126 ug/L 08.08.2020 10:59 1, 1, 1 -Trichloroethane <0.374 25.0 29.6 118 63-128 ug/L 08.08.2020 10:59 1,1,2,2-Tetrachloroethane <0.370 25.0 24.9 100 79-133 ug/L 08.08.2020 10:59 1,1,2-Trichloroethane <0.431 25.0 25.4 102 82-126 ug/L 08.08.2020 10:59 1, 1 -Dichloroethane <0.392 25.0 27.7 ill 77-120 ug/L 08.08.2020 10:59 1, 1 -Dichloroethene <0.352 25.0 28.2 113 67-123 ug/L 08.08.2020 10:59 1, 1 -Dichloropropene <0.334 25.0 29.0 116 76-126 ug/L 08.08.2020 10:59 1,2,3-Trichlorobenzene <0.297 25.0 27.7 ill 41-136 ug/L 08.08.2020 10:59 1,2,3-Trichloropropane <0.359 25.0 25.0 100 77-125 ug/L 08.08.2020 10:59 1,2,4-Trichlorobenzene <0.325 25.0 26.5 106 41-132 ug/L 08.08.2020 10:59 1,2,4-Trimethylbenzene <0.335 25.0 29.2 117 53-141 ug/L 08.08.2020 10:59 1,2-Dibromoethane (EDB) <0.376 25.0 25.6 102 82-130 ug/L 08.08.2020 10:59 1,2-Dichlorobenzene <0.375 25.0 26.4 106 83-128 ug/L 08.08.2020 10:59 1,2-Dichloroethane <0.405 25.0 26.6 106 59-134 ug/L 08.08.2020 10:59 1,2-Dichloropropane <0.376 25.0 27.8 ill 79-125 ug/L 08.08.2020 10:59 1,3,5-trimethylbenzene <0.352 25.0 29.5 118 69-125 ug/L 08.08.2020 10:59 1,3-Dichlorobenzene <0.360 25.0 27.8 ill 83-126 ug/L 08.08.2020 10:59 1,3-Dichloropropane <0.275 25.0 26.0 104 85-124 ug/L 08.08.2020 10:59 1,4-Dichlorobenzene <0.367 25.0 26.9 108 82-121 ug/L 08.08.2020 10:59 2,2-Dichloropropane <0.343 25.0 30.0 120 56-122 ug/L 08.08.2020 10:59 2-Butanone (MEK) <1.03 125 99.7 80 66-136 ug/L 08.08.2020 10:59 2-Chlorotoluene <0.365 25.0 29.3 117 73-129 ug/L 08.08.2020 10:59 2-Hexanone <2.17 125 102 82 63-140 ug/L 08.08.2020 10:59 4-Chlorotoluene <0.349 25.0 29.1 116 76-129 ug/L 08.08.2020 10:59 4-Methyl-2-pentanone (MIBK) <2.21 125 110 88 73-126 ug/L 08.08.2020 10:59 Acetone <4.53 125 71.9 58 47-138 ug/L 08.08.2020 10:59 Benzene <0.388 25.0 27.6 110 70-135 ug/L 08.08.2020 10:59 Bromobenzene <0.386 25.0 27.3 109 76-120 ug/L 08.08.2020 10:59 Bromochloromethane <0.384 25.0 25.7 103 83-132 ug/L 08.08.2020 10:59 Bromodichloromethane <0.372 25.0 28.2 113 66-132 ug/L 08.08.2020 10:59 Bromoform <0.449 25.0 25.2 101 63-143 ug/L 08.08.2020 10:59 Bromomethane <0.498 25.0 22.0 88 60-134 ug/L 08.08.2020 10:59 Carbon Tetrachloride <0.352 25.0 30.2 121 59-139 ug/L 08.08.2020 10:59 Chlorobenzene <0.367 25.0 27.1 108 83-120 ug/L 08.08.2020 10:59 Chloroethane <0.381 25.0 25.8 103 67-125 ug/L 08.08.2020 10:59 Chloroform <0.382 25.0 27.4 110 72-120 ug/L 08.08.2020 10:59 Chloromethane <0.395 25.0 22.6 90 59-128 ug/L 08.08.2020 10:59 cis-1,2-Dichloroethene <0.393 25.0 27.6 110 80-125 ug/L 08.08.2020 10:59 cis-1,3-Dichloropropene <0.393 25.0 27.6 110 74-122 ug/L 08.08.2020 10:59 Dibromochloromethane <0.420 25.0 26.5 106 70-130 ug/L 08.08.2020 10:59 Dichlorodifluoromethane <0.372 25.0 26.2 105 48-138 ug/L 08.08.2020 10:59 Diisopropyl ether <0.359 25.0 27.4 110 77-125 ug/L 08.08.2020 10:59 Ethanol <166 1000 861 86 55-133 ug/L 08.08.2020 10:59 Ethylbenzene <0.355 25.0 28.0 112 70-140 ug/L 08.08.2020 10:59 isopropylbenzene <0.363 25.0 28.4 114 70-130 ug/L 08.08.2020 10:59 m,p-Xylenes <0.717 50.0 55.2 110 65-151 ug/L 08.08.2020 10:59 Methylene Chloride <0.786 25.0 24.3 97 70-130 ug/L 08.08.2020 10:59 Methyl tert-butyl ether (MTBE) 1.64 25.0 25.0 93 51-155 ug/L 08.08.2020 10:59 Naphthalene <0.256 25.0 25.6 102 34-135 ug/L 08.08.2020 10:59 n-Butylbenzene <0.342 25.0 30.0 120 73-128 ug/L 08.08.2020 10:59 MS/MSD Percent Recovery [D] = 100*(C-A) / B LCS = Laboratory Control Sample MS = Matrix Spike Relative Percent Difference RPD = 200* I (C-E) / (C+E) A = Parent Result B = Spike Added LCS/LCSD Recovery [D] = 100 * (C) / [B] C = MS/LCS Result D = MSD/LCSD % Rec Log Difference Log Diff. = Log(Sample Duplicate) - Log(Original Sample) E = MSD/LCSD Result Page 27 of 33 Final 1.000 QC Summary 668825 tiff eurof ins Environment Testing Xenco Terraquest Environmental Consultants, P.C. NorthGate Shell Analytical Method: VOCs by GC/MS by SM6200B Prep Method: SM620OB_PREP Seq Number: 3134037 Matrix: Ground Water Date Prep: 08.08.2020 Parent Sample Id: 668826-006 MS Sample Id: 668826-006 S Parameter Parent Spike MS MS Limits Units Analysis Fla g Result Amount Result %Rec Date n-Propylbenzene <0.307 25.0 29.6 118 75-125 ug/L 08.08.2020 10:59 o-Xylene <0.359 25.0 27.2 109 58-148 ug/L 08.08.2020 10:59 p-Cymene (p-Isopropyltoluene) <0.336 25.0 29.7 119 70-130 ug/L 08.08.2020 10:59 Sec-Butylbenzene <0.336 25.0 30.0 120 77-122 ug/L 08.08.2020 10:59 Styrene <0.353 25.0 26.4 106 54-137 ug/L 08.08.2020 10:59 tert-Butylbenzene <0.334 25.0 29.9 120 74-124 ug/L 08.08.2020 10:59 Tetrachloroethylene <0.322 25.0 29.0 116 57-130 ug/L 08.08.2020 10:59 Toluene <0.366 25.0 27.3 109 81-125 ug/L 08.08.2020 10:59 trans-1,2-dichloroethene <0.311 25.0 27.4 110 69-122 ug/L 08.08.2020 10:59 trans-1,3-dichloropropene <0.365 25.0 26.6 106 73-129 ug/L 08.08.2020 10:59 Trichloroethene <0.393 25.0 28.7 115 73-124 ug/L 08.08.2020 10:59 Trichlorofluoromethane <0.359 25.0 28.9 116 49-139 ug/L 08.08.2020 10:59 Vinyl Acetate <1.88 125 116 93 57-134 ug/L 08.08.2020 10:59 Vinyl Chloride <0.381 25.0 26.8 107 60-140 ug/L 08.08.2020 10:59 Surrogate MS MS Limits Units Analysis %Rec Flag Date 1,2-Dichloroethane-D4 98 62-126 % 08.08.2020 10:59 4-Bromofluorobenzene 103 70-130 % 08.08.2020 10:59 Dibromofluoromethane 99 70-130 % 08.08.2020 10:59 Toluene-138 101 83-116 % 08.08.2020 10:59 MS/MSD Percent Recovery [D] = 100*(C-A) / B LCS = Laboratory Control Sample MS = Matrix Spike Relative Percent Difference RPD = 200* I (C-E) / (C+E) A = Parent Result B = Spike Added LCS/LCSD Recovery [D] = 100 * (C) / [B] C = MS/LCS Result D = MSD/LCSD % Rec Log Difference Log Diff. = Log(Sample Duplicate) - Log(Original Sample) E = MSD/LCSD Result Page 28 of 33 Final 1.000 tiff etirof ins Environment resting 1lenco QC Summary 668825 Terraquest Environmental Consultants, P.C. NorthGate Shell Analytical Method: VOCs by GC/MS by SM6200B Prep Method: SM620OB_PREP Seq Number: 3134076 Matrix: Ground Water Date Prep: 08.10.2020 Parent Sample Id: 668825-002 MS Sample Id: 668825-002 S Parameter Parent Spike MS MS Limits Units Analysis Result Amount Result %Rec Date 1, 1, 1,2-Tetrachloroethane <1.83 125 133 106 76-126 ug/L 08.10.2020 16:36 1, 1, 1 -Trichloroethane <1.87 125 158 126 63-128 ug/L 08.10.2020 16:36 1,1,2,2-Tetrachloroethane <1.85 125 131 105 79-133 ug/L 08.10.2020 16:36 1,1,2-Trichloroethane <2.15 125 128 102 82-126 ug/L 08.10.2020 16:36 1, 1 -Dichloroethane <1.96 125 148 118 77-120 ug/L 08.10.2020 16:36 1, 1 -Dichloroethene <1.76 125 145 116 67-123 ug/L 08.10.2020 16:36 1, 1 -Dichloropropene <1.67 125 157 126 76-126 ug/L 08.10.2020 16:36 1,2,3-Trichlorobenzene <1.49 125 127 102 41-136 ug/L 08.10.2020 16:36 1,2,3-Trichloropropane <1.80 125 129 103 77-125 ug/L 08.10.2020 16:36 1,2,4-Trichlorobenzene <1.62 125 125 100 41-132 ug/L 08.10.2020 16:36 1,2,4-Trimethylbenzene <1.68 125 143 114 53-141 ug/L 08.10.2020 16:36 1,2-Dibromoethane (EDB) <1.88 125 128 102 82-130 ug/L 08.10.2020 16:36 1,2-Dichlorobenzene <1.87 125 129 103 83-128 ug/L 08.10.2020 16:36 1,2-Dichloroethane 3.75 125 142 ill 59-134 ug/L 08.10.2020 16:36 1,2-Dichloropropane <1.88 125 145 116 79-125 ug/L 08.10.2020 16:36 1,3,5-trimethylbenzene <1.76 125 144 115 69-125 ug/L 08.10.2020 16:36 1,3-Dichlorobenzene <1.80 125 134 107 83-126 ug/L 08.10.2020 16:36 1,3-Dichloropropane <1.38 125 133 106 85-124 ug/L 08.10.2020 16:36 1,4-Dichlorobenzene <1.83 125 129 103 82-121 ug/L 08.10.2020 16:36 2,2-Dichloropropane <1.71 125 158 126 56-122 ug/L 08.10.2020 16:36 2-Butanone (MEK) <5.15 625 556 89 66-136 ug/L 08.10.2020 16:36 2-Chlorotoluene <1.83 125 140 112 73-129 ug/L 08.10.2020 16:36 2-Hexanone <10.9 625 514 82 63-140 ug/L 08.10.2020 16:36 4-Chlorotoluene <1.75 125 144 115 76-129 ug/L 08.10.2020 16:36 4-Methyl-2-pentanone (MIBK) <11.1 625 567 91 73-126 ug/L 08.10.2020 16:36 Acetone <22.7 625 435 70 47-138 ug/L 08.10.2020 16:36 Benzene 3.15 125 145 113 70-135 ug/L 08.10.2020 16:36 Bromobenzene <1.93 125 134 107 76-120 ug/L 08.10.2020 16:36 Bromochloromethane <1.92 125 137 110 83-132 ug/L 08.10.2020 16:36 Bromodichloromethane <1.86 125 146 117 66-132 ug/L 08.10.2020 16:36 Bromoform <2.24 125 127 102 63-143 ug/L 08.10.2020 16:36 Bromomethane <2.49 125 105 84 60-134 ug/L 08.10.2020 16:36 Carbon Tetrachloride <1.76 125 159 127 59-139 ug/L 08.10.2020 16:36 Chlorobenzene <1.83 125 132 106 83-120 ug/L 08.10.2020 16:36 Chloroethane <1.90 125 134 107 67-125 ug/L 08.10.2020 16:36 Chloroform <1.91 125 146 117 72-120 ug/L 08.10.2020 16:36 Chloromethane <1.97 125 108 86 59-128 ug/L 08.10.2020 16:36 cis-1,2-Dichloroethene <1.97 125 145 116 80-125 ug/L 08.10.2020 16:36 cis-1,3-Dichloropropene <1.97 125 140 112 74-122 ug/L 08.10.2020 16:36 Dibromochloromethane <2.10 125 135 108 70-130 ug/L 08.10.2020 16:36 Dichlorodifluoromethane <1.86 125 135 108 48-138 ug/L 08.10.2020 16:36 Diisopropyl ether 50.6 125 200 120 77-125 ug/L 08.10.2020 16:36 Ethanol <831 5000 4500 90 55-133 ug/L 08.10.2020 16:36 Ethylbenzene <1.77 125 138 110 70-140 ug/L 08.10.2020 16:36 isopropylbenzene 2.45 125 140 110 70-130 ug/L 08.10.2020 16:36 m,p-Xylenes <3.59 250 269 108 65-151 ug/L 08.10.2020 16:36 Methylene Chloride <3.93 125 130 104 70-130 ug/L 08.10.2020 16:36 Methyl tert-butyl ether (MTBE) 1210 125 1000 103 51-155 ug/L 08.10.2020 16:36 Naphthalene <1.28 125 120 96 34-135 ug/L 08.10.2020 16:36 n-Butylbenzene <1.71 125 146 117 73-128 ug/L 08.10.2020 16:36 MS/MSD Percent Recovery [D] = 100*(C-A) / B LCS = Laboratory Control Sample MS = Matrix Spike Relative Percent Difference RPD = 200* I (C-E) / (C+E) A = Parent Result B = Spike Added LCS/LCSD Recovery [D] = 100 * (C) / [B] C = MS/LCS Result D = MSD/LCSD % Rec Log Difference Log Diff. = Log(Sample Duplicate) - Log(Original Sample) E = MSD/LCSD Result Page 29 of 33 Final 1.000 Flag fi QC Summary 668825 tiff eurof ins Environment Testing Xenco Terraquest Environmental Consultants, P.C. NorthGate Shell Analytical Method: VOCs by GC/MS by SM6200B Prep Method: SM620OB_PREP Seq Number: 3134076 Matrix: Ground Water Date Prep: 08.10.2020 Parent Sample Id: 668825-002 MS Sample Id: 668825-002 S Parameter Parent Spike MS MS Limits Units Analysis Fla g Result Amount Result %Rec Date n-Propylbenzene <1.53 125 144 115 75-125 ug/L 08.10.2020 16:36 o-Xylene <1.79 125 130 104 58-148 ug/L 08.10.2020 16:36 p-Cymene (p-Isopropyltoluene) <1.68 125 143 114 70-130 ug/L 08.10.2020 16:36 Sec-Butylbenzene <1.68 125 149 119 77-122 ug/L 08.10.2020 16:36 Styrene <1.76 125 128 102 54-137 ug/L 08.10.2020 16:36 tert-Butylbenzene <1.67 125 146 117 74-124 ug/L 08.10.2020 16:36 Tetrachloroethylene 2.60 125 136 107 57-130 ug/L 08.10.2020 16:36 Toluene <1.83 125 134 107 81-125 ug/L 08.10.2020 16:36 trans-1,2-dichloroethene <1.55 125 141 113 69-122 ug/L 08.10.2020 16:36 trans-1,3-dichloropropene <1.83 125 133 106 73-129 ug/L 08.10.2020 16:36 Trichloroethene <1.97 125 148 118 73-124 ug/L 08.10.2020 16:36 Trichlorofluoromethane <1.80 125 151 121 49-139 ug/L 08.10.2020 16:36 Vinyl Acetate <9.41 625 671 107 57-134 ug/L 08.10.2020 16:36 Vinyl Chloride <1.91 125 141 113 60-140 ug/L 08.10.2020 16:36 Surrogate MS MS Limits Units Analysis %Rec Flag Date 1,2-Dichloroethane-D4 102 62-126 % 08.10.2020 16:36 4-Bromofluorobenzene 106 70-130 % 08.10.2020 16:36 Dibromofluoromethane 105 70-130 % 08.10.2020 16:36 Toluene-138 99 83-116 % 08.10.2020 16:36 Analytical Method: VOCs by GC/MS by SM6200B Prep Method: SM620OB_PREP Seq Number: 3134171 Matrix: Ground Water Date Prep: 08.11.2020 Parent Sample Id: 669505-001 MS Sample Id: 669505-001 S Parameter Parent Spike MS MS Limits Units Analysis Fla g Result Amount Result %Rec Date Dichlorodifluoromethane <0.372 25.0 27.9 112 48-138 ug/L 08.11.202012:09 m,p-Xylenes <0.717 50.0 60.1 120 65-151 ug/L 08.11.202012:09 o-Xylene 0.390 25.0 29.4 116 58-148 ug/L 08.11.202012:09 Surrogate MS MS Limits Units Analysis %Rec Flag Date 1,2-Dichloroethane-D4 96 62-126 % 08.11.202012:09 4-Bromofluorobenzene 106 70-130 % 08.11.202012:09 Dibromofluoromethane 102 70-130 % 08.11.202012:09 Toluene-D8 99 83-116 % 08.11.202012:09 MS/MSD Percent Recovery [D] = 100*(C-A) / B LCS = Laboratory Control Sample MS = Matrix Spike Relative Percent Difference RPD = 200* I (C-E) / (C+E) A = Parent Result B = Spike Added LCS/LCSD Recovery [D] = 100 * (C) / [B] C = MS/LCS Result D = MSD/LCSD % Rec Log Difference Log Diff. = Log(Sample Duplicate) - Log(Original Sample) E = MSD/LCSD Result Page 30 of 33 Final 1.000 E N C ® AT O R I E s XENCO LABORATORIES CHAIN OF CUSTODY Page % of 1412 Tech Blvd., Tampa, FL 33619 (813-620-2000) Company Name: Terraquest Environmental Consultants Receiver's Initials/Temp: Custody Seai(s):_ Y N Lab Work Order # Address: 100 E. Ruffin St., Mebane, NC 27302 Results Sent to: P.O.# (if required): 7,? ad .20 Email address: Field Continents / Lab Precautions: Contact Phone #: 919-563-9091 Cell#: Project Name (Site): Analysis Requested Project Number (ID): Container Type Regulations: FL PRP Dry-Cln ADaPT SC NC DOD NPDES Preservation Code Sampler(s): (signatur } Sampler(s): (printed) g o z c Sample Ill # Sample Depth (Ft) Collection Date / Time :^� •o fi No. of Containers w 7-a -.�0 AN 1030 9 w 3 x 2 7.2 x 3 X 3 Li +) 7- P- 1 4 MU 7 2 f. 0 l0gG 3 IS •2 t- 0 1015 4L.1 3 Y 6 M 7.2? a 6 Y1 3 7 7- F- 8 9 10 1) Relinquished By: (} 2, —F Date / Time 12 94 a Q 2) Received By: Date / Time red by: (Circle One) Fe!!l'' UPS 1 Courier / Lab Pickup 1 Hand ! Other 3) Relinquished By: Date / Time 4) Received By: Date / Time 7 WRO MSA or XENCO terms and conditions apply Circle a Turnaround Time (business days) STD TAT; 10 Days; 5-7 Days; 3 Days 1 2 Days ; May: Same Day 5) Relinquished By: Date / Time 6) Received By: Date / Time Matrix Guide: (W=Water) (DW = Drinking Water) (GW = Groundwater) (SW = Surface Water) (L = Liquid) (0 = Oil) (S = Soil) (SD = Solid) (SL = Sludge) (A Air) (( .temp: 1.6 IR ID:NOU-i88 Preservation: 1= HCL 2 = HNO3 3 = H2SO4 4 = Na013 + NaAsO2 5 = NaOH + ZnAc 6 = Na2S203 7 = DI Water & McOH 8 = NaHSO4 & McOH 9 = None Cll::+0.2 }{ �y Corrected Temp:l • r Container Type. VC=Vial (Clear); VA =Vial (Amber); GC=Glass (Clear); GA=Glass (Amber); P=Plastic (I1DPE); TB=Tedlar Bag; ES=En Core Sampler; ZB=Ziplac Ba... --- A •apinE) aolivas x3pa j ivajino aas 'elpil awls iouis ulgilm palg aq isnw swlelo ualIpM •apinE)aouuas ino ul paisll swan jagio pua siuouumIsul algelio6au 'sleiaw snoloaid 'A.jlamaf -6•a 'OOgg sl onlen fLleulpJoeJixa;o swan io; wnwlxelN'ssol peivawnoop lenioe paeoxe iouueo Fjanooa-�{ -anlen paiepap pazlaoil;ne ay; Ao OO ig;o Ja1eaj6 agi of pa;lwy sl leloads io 'lel;uenbasuoo'le;uaploul 'Paalp Jauiaunn 06ewep }o swJo} JeW pue 'sisoo 'saa; s,R2w04e 'igoid ';saiaiul awmi 'sales;o ssol 'akjoed ay;;o amen oisuplul 6ulpnpul 'ssol Aue 10; x3Pa3 wo.g.ranooaU of ig6p anon, -Aldde apinE) a*yuas x3P8j iva.uno ay; ul puno; suolieilwl-1-wlelo Alawll a eig pue ssol lenioe anon }ueturruop'a6aeyo leumilppe ue ded `amen 3agl3p a ampap nof, ssalun uolieuuo;usslw Jo'luanllapslw'AJanllap-uou ` jap 'o0euiep 'ssol;o Xlnsaa aqj jaulaunn 'a6eNoed .rad Oo Lt;o ssapxe ul wlep Aue jol alglsuodsaa eq iou qlm x3p03-w00-xap8; uo algalrena 'apinE) aoiNag x3pa3 ivaiano auk ul suolilpuoo eolnaas aui of ivaweeibe moA saimimoo waisAs smajo esfl •anoge 96ewl lagel pea.lapun uo)jnq lagej eq;;oales 'slaqel lenpinlpul juud ao malnw 01:6�01y -suo:4nq pakaldslp aq; jo auo Buplollo Aq dels �xau jnol;aalas '6uijupd aa4V -s ,(s)legel aq; q}lm pa;uud aq lllm 'ssaocud suin;a-r aqa uo uol;ewio;ul gaim l.ualdlow jnoA apinoid goigm 'suoljorujsul;uawdigS wn}a�j eql -Z -lagel pea jo ldoo 6 jupd o; uo}}nq Juud, 9g;10919S - b v173:rsd9j1u995 ♦Y �za O O Z IIJJ = Lu J d U � Z Lu O I- 0 Iu � O R Y� Q CD CD to to CD N. � N Page 32 of 33 Final 1.000 Eurofins Xenco, LLC Prelogin/Nonconformance Report- Sample Log -In Client: Terraquest Environmental Consultants, F Acceptable Temperature Range: 0 - 6 degC Date/ Time Received: 07.31.2020 09.30.00 AM Air and Metal samples Acceptable Range: Ambient Work Order #: 668825 Temperature Measuring device used: HOU-188 Sample Receipt Checklist Comments #1 *Temperature of cooler(s)? 1.7 #2 *Shipping container in good condition? Yes #3 *Samples received on ice? Yes #4 *Custody Seals intact on shipping container/ cooler? N/A #5 Custody Seals intact on sample bottles? N/A #6*Custody Seals Signed and dated? N/A #7 *Chain of Custody present? Yes #8 Any missing/extra samples? No #9 Chain of Custody signed when relinquished/ received? Yes #10 Chain of Custody agrees with sample labels/matrix? Yes #11 Container label(s) legible and intact? Yes #12 Samples in proper container/ bottle? Yes #13 Samples properly preserved? Yes #14 Sample container(s) intact? Yes #15 Sufficient sample amount for indicated test(s)? Yes #16 All samples received within hold time? Yes #17 Subcontract of sample(s)? No #18 Water VOC samples have zero headspace? Yes * Must be completed for after-hours delivery of samples prior to placing in the refrigerator Analyst: JHYROM PH Device/Lot#: Checklist completed by: q-r /� Date: 07.31.2020 �Jhyrom Edralin Checklist reviewed by: �f d .Q� b� Date:08.03.2020 Chad Bechtold Page 33 of 33 Final 1.000