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HomeMy WebLinkAboutRA-6738_33892_CA_RPTS_20180504_MRP609A Piner Road, Suite 115 Wilmington, North Carolina 28409 Telephone 919-871-0999 Fax 737-207-8261 www.atcgroupservices.com May 4, 2018 Mr. Sean Patrick North Carolina Department of Environmental Quality Raleigh Regional Office Division of Waste Management - UST Section 1628 Mail Service Center Raleigh, North Carolina 27699-1628 Re: Groundwater Monitoring Report Pantry #3471 4940 U.S. Highway 264 West Wilson, Wilson County, North Carolina NCDEQ Incident No. 33892 NCDEQ Risk Classification: H155A Dear Mr. Patrick: ATC Associates of North Carolina, P.C. (ATC), on behalf of Circle K Stores, Inc., is submitting this Groundwater Monitoring Report to document the installation and maintenance of Biosocks in select monitoring wells and the recent groundwater sampling event. If you have any questions or require additional information, please contact our office at (919) 871-0999. Sincerely, ATC Associates of North Carolina, P.C. Maureen Jackson, P.G. Senior Project Manager cc: Mr. Brent Puzak, Circle K Stores, Inc. Monitoring Report Pantry #3471 4940 Raleigh Road Parkway Wilson, North Carolina May 4, 2018 Site Identification 1. Site Identification Date of Report: May 4, 2018 Facility I.D.: 0-035356 UST Incident Number (if known): 33892 Site Risk: __High________ Site Rank: 155A Land Use Category: Residential Site Name: Pantry #3471 Site Street Address: 4940 U.S. Highway 264 West City/Town: Wilson Zip Code: 27896 County: Wilson Description of Geographical Data Point: Onsite Building________ Location Method: Google Earth______________ ___________ __ _ Latitude (decimal degrees): _35°45’48.54” N_ Longitude (decimal degrees): __78°00’01.05” W ____ 2. Information about Contacts Associated with the Leaking UST System UST Owner: Circle K Stores, Inc. Address: 1100 Situs Court, Suite 100 Raleigh, North Carolina 27606 Tel.: (919) 774-6700 UST Operator: _Circle K Stores, Inc. Address: 1100 Situs Court, Suite 100 Raleigh, North Carolina 27606 Tel.: (919) 774-6700 Property Owner: Circle K Stores, Inc. Address: 1100 Situs Court, Suite 100 Raleigh, North Caorlina 27606 Tel.: (919) 774-6700 Property Occupant: Pantry #3471 Address: 4940 Raleigh Road Parkway Wilson, North Carolina 27896 Tel.: (252) 237-7200 Consultant/Contractor: ATC Associates of North Carolina, P.C. Address: 609A Piner Road, Suite 115 Wilmington, North Carolina 28409 Tel.: (919) 871-0999 Analytical Laboratory: __Con-test Analytical Laboratory__State Certification No.__652 __ _ Address: 39 Spruce Street East Longmeadow, Massachusetts 01028 Tel: _413-525-2332 3. Information about Release Date Discovered: February 7, 2013 Estimated Quantity of Release: Unknown Cause of Release: UST system operations Source of Release (Dispenser/Piping/UST): Product Line Piping Sizes and contents of UST system(s) from which the release occurred: Two 15,000-gallon diesel USTs, one 15,000-gallon gasoline UST, one 12,000-gallon gasoline UST, and one 10,000-gallon kerosene UST. Criteria Used to Classify Risk: Drinking water well within 1,000 feet of release and surface water within 500 feet of release. 4. Information about the Monitoring Report Date(s) of Groundwater Monitoring/Soil Sampling Event(s): March 22, 2018 Period of Time Reported: September 1, 2017 through March 31, 2018 Type of Monitoring Report: Semi-Annual Groundwater Monitoring TABLE OF CONTENTS 1.0 INTRODUCTION.......................................................................................................1 2.0 EXECUTIVE SUMMARY ........................................................................................1 3.0 SITE HISTORY ..........................................................................................................1 4.0 FREE PRODUCT RECOVERY ...............................................................................5 5.0 GROUNDWATER MONITORING .........................................................................5 5.1 Geology and Hydrogeology .................................................................................5 5.2 Biosock Installation and Maintenance .................................................................6 5.3 Groundwater Elevations .......................................................................................7 5.4 Groundwater Analytical Results ..........................................................................6 5.5 Water Supply Well Sampling ..............................................................................7 6.0 MONITORING PLAN AND SCHEDULE ..............................................................8 7.0 CONCLUSIONS .........................................................................................................8 8.0 STATEMENTS AND CERTIFICATION ..............................................................10 TABLES Table 1 UST System Information Table 2 Adjacent Property Owner Information Table 3 Water Supply Well Information Table 4 Field Data Measurements Table 5 Total Emissions Calculations Table 6 Monitoring Well Construction Details Table 7 Groundwater Elevations and Historical Data Table 8 Current Groundwater Analytical Results Table 9 Historical Groundwater Analytical Results Table 10 Water Supply Well Analytical Results FIGURES Figure 1 USGS Topographic Map Figure 2 Site Map Figure 3 Site Vicinity Map Figure 4 Groundwater Elevation Contour Map Figure 5 Contaminants of Concern – 2B x 10 Exceedances Figure 6 Contaminants of Concern – 2L Exceedances Figure 7 DW-1: Dissolved MTBE Concentrations versus Depth to Water Through Time APPENDICES Appendix A Historical Soil Analytical Data and Soil Sample Location Map Appendix B Geologic Transect and Cross-Section Maps (2015) Appendix C Vacuum Truck Specifications and Waste Disposal Manifests Appendix D Historical Groundwater Elevation Contour Maps Appendix E Laboratory Analytical Results Monitoring Report May 4, 2018 NCDEQ Incident No.33892 Page 1 1.0 INTRODUCTION ATC Associates of North Carolina, P.C. (ATC), on behalf of Circle K Stores, Inc. (Circle K), is submitting this monitoring report for the Pantry #3471 facility located at 4940 U.S. Highway 264 West, Wilson, Wilson County, North Carolina (Incident #33892). Currently, the site is an active convenience store and retail fuel outlet. A site topographic map is presented as Figure 1 and site map is presented as Figure 2. UST owner/operator and system information is included in Table 1. 2.0 EXECUTIVE SUMMARY The presence of petroleum-related impacts to soil, above Soil-to-Groundwater Maximum Contaminant Concentrations (STGW-MSCCs), were identified in soil samples SD-10 and SK-30. Soil sample SD-10 was collected near the gasoline dispenser islands and soil sample SK-30 was located near the kerosene product line. It should be noted petroleum-related impacts to soil were not identified above the applicable Residential MSCCs. Horizontally, the extent of impacted soil is in the vicinity of the gasoline dispenser area and the kerosene product line. Vertically, impacted soil extends to the water table. Historical soil analytical data along with a map depicting the locations of the soil samples are provided in Appendix A. Overall, free product has been identified in monitoring well MW-3 and the dissolved contaminant concentration of concern includes dissolved MTBE in monitoring well DW-1. This concentration exceeds the established ten times the 2B Surface Water Standard of 190 micrograms per liter (µg/L). As a consequence of the assessment activities conducted at the facility, the horizontal and vertical extents of dissolved petroleum hydrocarbon concentrations have been reasonably defined and are limited to the vicinity of monitoring well DW-1 and free product appears to be limited to the area of monitoring well MW-3. Based on the most current groundwater analytical data, it appears dissolved MTBE concentrations in monitoring well DW-1 have increased slightly since 2015. A geologic transect and geologic cross-sections with the March 2015 analytical data are included in Appendix B. 3.0 SITE HISTORY On February 17, 2009, the North Carolina Department of Environmental Quality (NCDEQ) conducted a compliance inspection at the facility. On February 18, 2009, NCDEQ issued a Monitoring Report May 4, 2018 NCDEQ Incident No. 33892 Page 2 Notice of Violation (NOV) for the site as the premium gasoline underground storage tank (UST) was not in compliance with current NC UST regulations. In the NOV, the following violations were noted: premium UST did not have any spill protection, failure to report a suspected release, and failure to investigate a suspected release. In response to the NOV, ATC personnel initiated site check activities. As part of the site check activities, a soil boring (SB-1) was collected near the premium gasoline UST fill port. The soil analytical data did not detect total petroleum hydrocarbons (TPH) – gasoline range organics (GRO) above the established NCDEQ Action Level of 10 milligrams per kilogram (mg/kg). A Site Check Report was submitted to NCDEQ on July 9, 2009. In response to the findings presented in the Site Check Report, NCDEQ issued a Notice of Regulatory Requirements (NORR) on November 16, 2009, requesting a site check addendum. On January 20, 2010, ATC supervised the installation of monitoring well MW-1. Subsequently, a groundwater sample was collected from well MW-1. Groundwater analytical results of the groundwater sample collected from monitoring well MW-1 indicated dissolved target compound concentrations exceeding established 2L Standards. On September 8, 2010, based on the laboratory analytical results of the groundwater sample, NCDEQ issued a Notice of Regulatory Requirements (NORR) requesting a limited site check in the area of the diesel and kerosene UST systems. ATC advanced forty-seven soil borings at various locations around the site. Laboratory analytical results of the soil samples detected TPH-diesel range organics (DRO) above the established action level in several of the soil samples. A second monitoring well, MW-2, was installed at the site adjacent to the diesel dispensers. Laboratory analytical results of the groundwater sample collected from monitoring well MW-2 did not detect dissolved target compound concentrations above established 2L Standards. A receptor survey was completed during this time and two potable water supply wells (one active and one inactive) were identified within 1,500 feet of the site. A Site Check and Receptor Survey Report was submitted to NCDEQ on January 3, 2011. Monitoring Report May 4, 2018 NCDEQ Incident No. 33892 Page 3 During May 2011, The Pantry installed spill containment sumps at eight of the twelve gasoline dispenser islands. During these activities, petroleum staining and odor was detected in the soil. Between May and June 2011, as part of initial abatement activities, approximately 35.89 tons of petroleum-impacted soil was excavated from the site for off-site disposal. Laboratory analytical results of soil samples detected TPH-DRO and TPH-GRO above the action level for several of the soil samples. During February 2013, The Pantry conducted gasoline piping replacement at six of the gasoline dispensers located on the eastern portion of the property. During these activities, petroleum staining and odor was detected in the soil. As part of initial abatement activities, approximately 200 tons of petroleum-impacted soil was excavated from the site for off-site disposal. Laboratory analytical results of soil samples detected TPH-GRO and TPH-GRO above the action level for several of the soil samples. Based on the soil analytical results, a Phase I LSA was initiated. As part of LSA activities, three monitoring wells were installed and subsequently sampled. Free product was measured in monitoring well MW-3 at a thickness of 0.58 feet. Laboratory analytical results of the groundwater samples collected from the remaining wells detected dissolved target compound concentrations in exceedance of 2L Standards. ATC also conducted a receptor survey which identified one water supply well within 1,000 feet of the site. The well, PW-1, is located approximately 550 feet southwest of the site and is used for drinking purposes. Based on a “high risk” classification of the site, ATC recommended the completion of a Comprehensive Site Assessment (CSA). CSA activities were conducted at the site in February 2015. During CSA activities, six monitoring wells were advanced to delineate impacted groundwater at the site, a comprehensive sampling event was conducted, and slug testing was performed to determine aquifer characteristics. Based on laboratory analytical results, dissolved target compound concentrations exceeding 2L Standards were observed in several monitoring wells. A CSA Report was submitted to NCDEQ on May 8, 2015. Monitoring Report May 4, 2018 NCDEQ Incident No. 33892 Page 4 On August 3, 2015, NCDEQ issued a NORR for deficiencies noted in the CSA report: soil contaminated was not delineated using risk-based analytical parameters and the vertical delineation of petroleum-impacted groundwater above 2L Standards was not completed. An Initial Pre-Corrective Action Plan (CAP) Monitoring Report was submitted to NCDEQ on February 17, 2016. Since February 2016, Aggressive Fluid Vapor Recovery (AFVR) events have been performed on monitoring well MW-3 to address the presence of free product at the site and semi-annual groundwater sampling events have been performed. Biosocks have been installed and maintained in select wells to assist with natural attenuation activities. The site and surrounding area is classified by Wilson County as Business. Properties beyond the site are mainly gas stations, restaurants, and hotels. Adjacent property owner information is included as Table 2. Figure 3 presents a map depicting the surrounding area. During previous assessment activities, two water supply wells were identified within 1,500 feet of the subject facility. One water supply well, PW-1, is located approximately 550 feet southwest of the site and is used for potable purposes. The second water supply well is located 1,500 feet southwest of the site and is currently not in use. Water supply information is summarized in Table 3 and depicted on Figure 3. Public water supplies in the area are provided by the City of Wilson. The City of Wilson obtains its water from two sources, Contentnea Creek and Toisnot Reservoir. Contentnea Creek water is stored in Buckhorn Lake and the downstream Wiggins Mill Reservoir. The Toisnot Reservoir is supplied by the upgradient Lake Wilson. This report documents the installation and maintenance of Biosocks in select monitoring wells, the performance of two Aggressive Fluid Vapor Recovery (AFVR) events, and a groundwater sampling event. Monitoring Report May 4, 2018 NCDEQ Incident No. 33892 Page 5 4.0 FREE PRODUCT RECOVERY On November 16, 2017, ATC personnel did not measure free product within monitoring well MW-3. On this date, it was noted that the absorbent sock within well MW-3 was slightly saturated and it was not replaced. On November 16, 2017, ATC conducted an AFVR event using monitoring well MW-3. Prior to the start of the AFVR, free product was not measured in monitoring well MW-3. At the end of the event, a total of 348 gallons of mixed groundwater and free product was recovered. During the event, a total of 0.155 pounds of free product was recovered in the form of vapor emissions (equivalent to 0.0275 gallons). Field data measurements are provided in Table 4. Total emissions calculations are provided in Table 5. The vacuum truck blower specifications and the disposal waste manifest of the fluids collected and disposed of by Eastern Environmental Management, LLC are provided in Appendix C. On February 8, 2018, ATC personnel did not measure free product within monitoring well MW- 3. On this date, it was noted that the absorbent sock within well MW-3 was slightly saturated and it was not replaced. On February 8, 2018, ATC conducted an AFVR event using monitoring well MW-3. Prior to the start of the AFVR, free product was not measured in monitoring well MW-3. At the end of the event, a total of 1,368 gallons of mixed groundwater and free product was recovered. During the event, a total of 0.007 pounds of free product was recovered in the form of vapor emissions (equivalent to 0.0013 gallons). Field data measurements are provided in Table 4. Total emissions calculations are provided in Table 5. The vacuum truck blower specifications and the disposal waste manifest of the fluids collected and disposed of by Eastern Environmental Management, LLC are provided in Appendix C. 5.0 GROUNDWATER MONITORING 5.1 Geology and Hydrogeology According to the Geologic Map of North Carolina (1985), the site is located within the Coastal Plain Physiographic Region of North Carolina. More specifically, the site is underlain by the Yorktown Formation and Duplin Formation, undivided. The Yorktown Formation is Monitoring Report May 4, 2018 NCDEQ Incident No. 33892 Page 6 characterized by fossiliferous clay with varying amounts of fine grained, bluish gray, shell material concentrated in lenses. The Duplin Formation is characterized by shelly, medium to coarse grained sand, sandy marl, and limestone and is also bluish gray. It appears the surficial aquifer extends to a depth of 20 feet below ground surface (bgs), the Yorktown aquifer extended approximately 20 to 40 feet bgs, and the Upper Cape Fear aquifer extends from 40 to 80 feet bgs. According to the Soil Survey of Wilson County, North Carolina, prepared by the United States Department of Agriculture Soil Conservation Service, the site lies within the Norfolk loamy sand complex, the Rains sandy loam complex, and the Tatus loam complex. The Norfolk loamy sand complex is classified by 2 to 6 percent slopes, well drained, moderately high to high capacity to transmit water, and originates from loamy marine deposits. The Rains sandy loam complex is classified by 0 to 2 percent slopes, poorly drained, moderately high to high capacity to transmit water, and originates from loamy marine deposits. Finally, the Tatum loam complex is classified by 2 to 6 percent slopes, well drained, very low to high capacity to transmit water, and originates from residuum of weathered metavolcanics and/or argillite. Groundwater movement in the upper portion of the surficial aquifer appears to flow in a northeastern direction across the site. Based on available groundwater data, it appears there is a slight vertical head difference between the shallow and deep monitoring well, which suggest that a vertical exchange of groundwater may occur between the upper and lower portions of the surficial aquifer. As part of the CSA, ATC performed a slug test using monitoring wells MW-7, MW-9, and DW-1. Based on the slug test results, the average hydraulic conductivity at the site was calculated at approximately 0.8261 feet per day. 5.2 Biosock Installation and Maintenance On November 16, 2017 and March 22, 2018, ATC personnel installed and maintained Biosocks in monitoring wells MW-1 and DW-1 to assist with natural attenuation activities. Monitoring Report May 4, 2018 NCDEQ Incident No. 33892 Page 7 5.3 Groundwater Elevations On March 22, 2018, ATC collected static water level measurements from monitoring wells MW-1, MW-2, MW-3, MW-5, MW-6, and DW-1. It should be noted free product was not measured in monitoring well MW-3 on this date. Depths to water measurements were collected using an electronic oil/water interface probe. The groundwater depths were converted to relative elevations using an assumed datum of 100 feet relative to an arbitrary on-site benchmark. Monitoring well construction details are included in Table 6. Current and historical groundwater elevation data are included in Table 7. A groundwater elevation contour map based on the March 2018 static water level data is included as Figure 4. Based on the recent groundwater level measurements, groundwater flow appears to be toward the northeast. Historical groundwater flow maps are provided in Appendix D. 5.4 Groundwater Analytical Results On March 22, 2018, groundwater samples were collected from monitoring wells MW-1, MW-2, MW-5, MW-6, and DW-1. It should be noted monitoring well MW-3 was not sampled on this date. Groundwater samples were collected into laboratory-approved containers, packed in ice and delivered under chain-of-custody to Con-test Analytical Laboratory (Con-test) in East Longmeadow, Massachusetts, for analyses. Groundwater samples were analyzed for volatile organic compounds (VOCs) via EPA Method 6200B including methyl tertiary-butyl ether (MTBE) and isopropyl ether (IPE). A summary of the recent groundwater analytical data is presented in Table 8 and a historical summary of groundwater analytical data is presented in Table 9. The laboratory analytical results from the March 2018 sampling event indicated a dissolved MTBE concentration of 240 µg/L in the groundwater sample collected from monitoring well DW-1. This detected dissolved MTBE concentration exceeds the established ten times the 2B Surface Water Standard of 190 µg/L. Other dissolved target compound concentrations were detected above laboratory method detection limits (MDLs) in the groundwater samples collected from monitoring wells MW-1, MW-2, MW-5, MW-6, and DW-1 however, these concentrations were below the established ten Monitoring Report May 4, 2018 NCDEQ Incident No. 33892 Page 8 times the 2B Surface Water Standards. It should be noted some of the dissolved target compound concentrations were detected above established 2L Standards. Dissolved contaminants of concern, exceeding ten times the 2B Surface Water Standard, are included as Figure 5. Dissolved contaminants of concern, exceeding 2L Standards, are included as Figure 6. It appears dissolved target compound concentrations in the groundwater samples from the monitoring wells being sampled are either decreasing or remaining relatively stable through time. At this time, it appears the dissolved MTBE concentration has increased slightly in monitoring well DW-1 since 2015. A groundwater concentration trend plot for dissolved MTBE concentrations versus depth to water is included as Figure 7. A copy of the laboratory analytical report is included as Appendix E. 5.5 Water Supply Well Sampling Water supply well PW-1 was not sampled during this reporting period. Historical analytical results of groundwater samples collected from the water supply well are provided in Table 10. 6.0 MONITORING PLAN AND SCHEDULE ATC will continue to install and maintain Biosocks in monitoring well DW-1 to assist with natural attenuation activities, conduct quarterly free product checks of monitoring well MW-3, and continue semi-annual groundwater sampling events of select monitoring wells. The next semi- annual groundwater sample event will be scheduled for September 2018. 7.0 CONCLUSIONS ATC has performed free product recovery events and a groundwater sampling event at the Pantry #3471 located in Wilson, North Carolina. Based on field activities, observations, and groundwater analytical results, ATC concludes the following: • Depth to groundwater measurements ranged from 4.70 feet to 8.31 feet below ground surface MW-1 and MW-2, respectively. Based on information obtained during the March 2018 sampling event, groundwater appears to flow across the site in a northeasterly direction; • Free phase product was not detected during the March 2018 sampling event; Monitoring Report May 4, 2018 NCDEQ Incident No. 33892 Page 9 • Two AFVR events conducted at the site recovered approximately 1,716 gallons of petroleum-impacted groundwater; • Biosocks have been installed and maintained in monitoring well DW-1 to assist in natural attenuation activities; • Based on historical soil analytical data, it appears soil above Residential MSCCs is not present at the facility. Horizontally, the extent of impacted soil is in the vicinity of the gasoline dispenser area and the kerosene product line. Vertically, impacted soil extends to the water table; • The laboratory analytical results from the March 2018 sampling event indicated a dissolved MTBE concentration of 240 µg/L in the groundwater sample collected from monitoring well DW-1; • Other dissolved target compound concentrations were detected at the site above 2L Standards but below ten times 2B Standards; • Based on the most recent groundwater analytical data, it is appears dissolved MTBE concentrations have slightly increased in monitoring well DW-1. Based on the groundwater analytical results, ATC recommends the continued installation and maintenance of Biosocks in monitoring well DW-1 to assist with natural attenuation activities, quarterly free product checks of monitoring well MW-3, and continued semi-annual groundwater sampling events of select monitoring wells. The next semi-annual groundwater sample event will be scheduled for September 2018. TABLES TABLE 1 UST SYSTEM INFORMATION PANTRY # 3471 4940 U.S. HIGHWAY 264 WEST WILSON, NORTH CAROLINA NCDEQ INCIDENT NO. 33892 UST ID Number Product Capacity (gallons)Date Installed Date taken out of Use Date Permanently Closed Was Release Associated With UST System? 1 Gasoline 15,000 12/18/1996 Currently in Use Not Applicable Unknown 2 Gasoline 12,000 12/18/1996 Currently in Use Not Applicable Unknown 3 Kerosene 10,000 12/18/1996 Currently in Use Not Applicable Unknown 4 Diesel 15,000 12/18/1996 Currently in Use Not Applicable Unknown 5 Diesel 15,000 12/18/1996 Currently in Use Not Applicable Unknown Facility ID No. Owner or Operator? 0-035356 Owner/Operator Name of Owner or Operator Dates of Ownership / Operation Circle K Stores, Inc.2001 to Present Raleigh, North Carolina 27606 Address Telephone Number 1100 Situs Court Suite 100 (919) 774-6700 TABLE 2 ADJACENT PROPERTY OWNER INFORMATION PANTRY #3471 4940 US HIGHWAY 264 WEST WILSON, NORTH CAROLINA NCDEQ INCIDENT NO. 33892 Parcel Identification Number Zoning Classification Observed Land Use Site Pantry #3471 Circle K Stores, Inc.2793-64-5554 4940 Raleigh Road Parkway 1100 Situs Court, Suite 100 Business District Wilson, North Carolina Raleigh, North Carolina 27606 Kangaroo Convenience Store North Wetlands Not Applicable Bloomery Swamp West of the Site Undeveloped Lot Virginia Hayes Lamm 2793-64-0760 4957 Raleigh Road Parkway No Zoning Classification Wilson, North Carolina 27896 Undeveloped East of the Site Citgo/Subway Circle K Stores, Inc.2793-64-8324 4934 Raleigh Road Parkway 1100 Situs Court, Suite 100 Business District Wilson, North Carolina Raleigh, North Carolina 27606 Convenience Gas Station South of the Site (Across Raleigh Road Parkway) K Mart #2 Rose Oil Company 2793-63-4899 4945 Raleigh Road Parkway 613 US Hwy 158 Bypass Business District Wilson, North Carolina Henderson, North Carolina 27537 Shell Convience Store Quality Inn Nistha, LLC 2793-63-6517 4941 Raleigh Road Parkway 4941 Raleigh Road Parkway Business District Wilson, North Carolina Wilson, North Carolina 27896 Hotel/Motel Aunt Sarah's Pancake House DVM Services Realty LLC 2793-63-7845 4935 Raleigh Road Parkway 5547 Packhouse Road Business District Wilson, North Carolina Wilson, North Carolina 27896-7913 Restaurant Property Location and Address Owner's Name and Address TABLE 3 WATER SUPPLY WELL INFORMATION PANTRY #3471 4940 U.S. HIGHWAY 264 WEST WILSON, NORTH CAROLINA NCDEQ INCIDENT NO. 33892 Well ID Last 6 digits of PIN Property Owner and Address Property Address Property Use/Tenant Well Use Distance from Source (feet) Connected to Municipal Water Virginia Hayes 4957 Raleigh Road Parkway Wilson, NC PW-2 74-7531 Beulah and Hazel Finch 5730 Lamm Road Wilson, NC Raleigh Road Parkway Agricultural with Abandoned/Delapitated Residence Not used due to abandoned house 1,500 No Location of water supply well PW-1 can be referenced on Figure 3. PW-1 4957 Raleigh Road Parkway Residential Drinking 550 No41-5379 TABLE 4FIELD DATA MEASUREMENTS PANTRY #3471 4940 U.S. HIGHWAY 264 WEST WILSON, NORTH CAROLINA NCDEQ INCIDENT NO: 33892 Date of AFVR: November 16, 2017 Date Time Unit-Vacuum(inches of Hg) Well-Head -Vacuum-(inches of Hg) Velocity (ft/min)Pipe ID(in)Temp(deg F)Rel. Humid(%) Water Vapor(%)Qstd(flow)Wells Used 8/21/2014 8:25 -21.0 -21.0 1,637 3 125.2 6.3 0.937 4.6 8/21/2014 8:40 -21.0 -21.0 2,065 3 141.1 8.6 0.914 7.7 8/21/2014 8:55 -21.0 -21.0 2,090 3 155.1 6.2 0.938 5.5 8/21/2014 9:10 -21.0 -21.0 2,685 3 160.8 5.7 0.943 6.4 8/21/2014 9:25 -21.0 -21.0 2,540 3 166.7 5.0 0.95 5.2 8/21/2014 9:40 -21.0 -21.0 2,483 3 169.5 4.8 0.952 4.9 8/21/2014 9:55 -21.0 -21.0 2,632 3 170.6 4.7 0.953 5.1 8/21/2014 10:10 -21.0 -21.0 2,647 3 171.7 5.0 0.95 5.4 8/21/2014 10:25 -21.0 -21.0 2,687 3 169.9 4.9 0.951 5.4 8/21/2014 10:55 -21.0 -21.0 2,740 3 172.5 5.4 0.946 6.1 8/21/2014 11:25 -21.0 -21.0 2,589 3 176.6 5.1 0.949 5.4 8/21/2014 11:55 -21.0 -21.0 2,458 3 177.1 5.0 0.95 5.0 8/21/2014 12:25 -21.0 -21.0 2,548 3 173.3 5.7 0.943 5.9 8/21/2014 12:55 -21.0 -21.0 2,487 3 173.2 5.5 0.945 5.6 8/21/2014 13:25 -21.0 -21.0 2,410 3 176.4 5.2 0.948 5.1 13:55 -21.0 -21.0 2,357 3 178.6 5.0 0.95 4.8 14:25 -21.0 -21.0 2,289 3 182.7 4.6 0.954 4.2 14:55 -21.0 -21.0 2,256 3 181.6 4.3 0.957 3.9 15:25 -21.0 -21.0 2,192 3 180.7 4.2 0.958 3.7 15:55 -21.0 -21.0 2,238 3 181.6 4.3 0.957 3.98/21/2014 16:25 -21.0 -21.0 2,215 3 181.5 4.2 0.958 3.8 Date of AFVR: February 8, 2018 Time Unit-Vacuum (inches of Hg) Well-Head -Vacuum- (inches of Hg) Velocity(ft/min)Pipe ID (in) Temp (deg F) Rel. Humid (%) Water Vapor (%) Qstd (flow)Wells Used 7:30 -21.0 -21.0 1,869 3 130.0 3.5 0.965 2.9 7:45 -21.0 -21.0 1,669 3 138.0 2.7 0.973 2.0 8:00 -21.0 -21.0 1,583 3 140.7 2.3 0.977 1.6 8:15 -21.0 -21.0 2,243 3 160.2 1.8 0.982 1.7 8:30 -21.0 -21.0 1,817 3 159.8 2.2 0.978 1.7 8:45 -21.0 -21.0 1,826 3 164.7 1.8 0.982 1.4 9:00 -21.0 -21.0 2,024 3 161.2 2.5 0.975 2.1 9:15 -21.0 -21.0 2,155 3 165.9 2.1 0.979 1.9 9:30 -21.0 -21.0 2,021 3 167.1 2.4 0.976 2.0 10:00 -21.0 -21.0 1,922 3 172.4 2.3 0.977 1.8 10:30 -21.0 -21.0 2,140 3 173.8 2.5 0.975 2.2 11:00 -21.0 -21.0 2,175 3 170.6 2.7 0.973 2.4 11:30 -21.0 -21.0 2,209 3 176.1 2.9 0.971 2.6 12:00 -21.0 -21.0 2,111 3 178.3 3.1 0.969 2.7 12:30 -21.0 -21.0 1,905 3 181.5 2.8 0.972 2.2 13:00 -21.0 -21.0 1,966 3 177.7 3.3 0.967 2.6 13:30 -21.0 -21.0 1,725 3 175.0 3.6 0.964 2.5 14:00 -21.0 -21.0 1,660 3 173.4 3.4 0.966 2.3 14:30 -21.0 -21.0 2,024 3 169.9 3.7 0.963 3.1 15:00 -21.0 -21.0 2,227 3 169.1 4.3 0.957 3.9 15:30 -21.0 -21.0 2,066 3 173.1 3.8 0.962 3.2 Well MW-3 stinger set at 13 feet bgs. Well MW-3 stinger set at 13 feet bgs. TABLE 5 TOTAL EMISSIONS CALCULATIONS PANTRY #3471 4940 U.S. HIGHWAY 264 WEST WILSON, NORTH CAROLINA NCDEQ INCIDENT NO: 33892 Date of AFVR Event: 11/16/17Time (min) Flow (DSCFM) PPM M easured (ppm) K (#C-gas)PPMg Cg:m (mg/dsm^3) Cg (lb/dscf) PMRg (lb/hr) PMR (lb) 5 4.6 297.6 1 298 1583 0.00010 0.027 0.007207.7 300.2 1 300.2 1596 0.00010 0.046 0.011355.5 406.2 1 406.2 2160 0.00013 0.044 0.011506.4 403.9 1 404 2148 0.00013 0.051 0.013655.2 410.7 1 411 2184 0.00014 0.043 0.011804.9 409.5 1 410 2178 0.00014 0.040 0.010 95 5.1 194.8 1 195 1036 0.00006 0.020 0.005 110 5.4 170.6 1 171 907 0.00006 0.018 0.0051255.4 160.3 1 160 852 0.00005 0.017 0.0091556.1 121.3 1 121 645 0.00004 0.015 0.0071855.4 122.0 1 122 649 0.00004 0.013 0.0072155.0 102.3 1 102 544 0.00003 0.010 0.0052455.9 93.3 1 93 496 0.00003 0.011 0.0062755.6 133.8 1 134 712 0.00004 0.015 0.0073055.1 177.0 1 177 941 0.00006 0.018 0.0093354.8 145.6 1 146 774 0.00005 0.014 0.0073654.2 168.8 1 169 898 0.00006 0.014 0.0073953.9 174.7 1 175 929 0.00006 0.014 0.0074253.7 142.3 1 142 757 0.00005 0.011 0.005 455 3.9 146.9 1 147 781 0.00005 0.011 0.006 485 3.8 125.5 1 126 667 0.00004 0.009 0.001 490 Total emissions in pounds 0.155 Total Emissions Converted into Gallons: 0.027500645 Date of AFVR Event: 2/8/18 Time (min) Flow (DSCFM) PPM M easured (ppm) K (#C-gas)PPMg Cg:m (mg/dsm^3) Cg (lb/dscf) PMRg (lb/hr) PMR (lb) 5 2.9 4.6 1 5 24 0.00000 0.000 0.000 20 2.0 3.5 1 3.5 19 0.00000 0.000 0.000 35 1.6 1.3 1 1.3 7 0.00000 0.000 0.000 50 1.7 1.9 1 2 10 0.00000 0.000 0.000 65 1.7 1.0 1 1 5 0.00000 0.000 0.000 80 1.4 0.5 1 1 3 0.00000 0.000 0.000 95 2.1 4.7 1 5 25 0.00000 0.000 0.000 110 1.9 13.3 1 13 71 0.00000 0.000 0.000 125 2.0 21.8 1 22 116 0.00001 0.001 0.000 155 1.8 32.1 1 32 171 0.00001 0.001 0.001 185 2.2 24.4 1 24 130 0.00001 0.001 0.001 215 2.4 48.2 1 48 256 0.00002 0.002 0.001 245 2.6 50.3 1 50 267 0.00002 0.003 0.001 275 2.7 45.1 1 45 240 0.00001 0.002 0.001 305 2.2 31.9 1 32 170 0.00001 0.001 0.001 335 2.6 19.7 1 20 105 0.00001 0.001 0.001 365 2.5 20.1 1 20 107 0.00001 0.001 0.001 395 2.3 7.2 1 7 38 0.00000 0.000 0.000 425 3.1 1.2 1 1 6 0.00000 0.000 0.000 455 3.9 0.0 1 0 0 0.00000 0.000 0.000 485 3.2 12.3 1 12 65 0.00000 0.001 0.000 490 Total emissions in pounds 0.007 Total Emissions Converted into Gallons: 0.001332932 TABLE 6 MONITORING WELL CONSTRUCTION DETAILS PANTRY #3471 4940 U.S. HIGHWAY 264 WEST WILSON, NORTH CAROLINA NCDEQ INCIDENT NO. 33892 Monitoring Well ID Date of Construction Well Diameter (inches) Screen Slot Size (inches) Total Well Depth (ft) Screen Interval (feet)Comments MW-1 1/20/2010 2 0.01 13 3-13 Active MW-2 11/9/2010 2 0.01 12 4-12 Active MW-3 8/2/2013 2 0.01 14 4-15 Active MW-4 8/2/2013 2 0.01 15 5-15 Active MW-5 8/2/2013 2 0.01 15 5-15 Active MW-6 2/12/2015 2 0.01 25 5.5-25 Active MW-7 2/12/2015 2 0.01 25 5.5-25 Active MW-8 2/12/2015 2 0.01 25 5.5-25 Active MW-9 2/12/2015 2 0.01 20 5.5-20 Active MW-10 2/12/2015 2 0.01 20 5.5-20 Active DW-1 2/13/2015 2 0.01 40 35-40 Active DW-2 11/20/2015 2 0.01 80 75-80 Active TABLE 7 GROUNDWATER ELEVATIONS AND HISTORICAL DATA PANTRY #34714940 U.S. HIGHWAY 264 WEST WILSON, NORTH CAROLINA NCDEQ INCIDENT NO. 33892 WELL I.D. Date TOC Elevation (ft) Depth to Product (ft) Depth to Groundwater (ft) Product Thickness (ft) Groundwater Elevations (ft) 8/5/2013 5.53 6.38 0.85 94.27 3/4/2015 --4.70 --95.30 6/2/2016 --4.85 --95.15 12/22/2016 --5.76 --94.24 6/14/2017 --4.70 --95.30 3/22/2018 --4.70 --95.30 8/5/2013 3/4/2015 --6.93 --87.15 6/2/2016 --8.35 --85.73 12/22/2016 --9.58 --84.50 6/14/2017 --8.16 --85.92 3/22/2018 --8.31 --85.77 8/5/2013 5.50 6.08 0.58 95.14* 3/4/2015 --3.95 --96.83 6/2/2016 4.11 4.13 0.02 96.67* 12/22/2016 4.82 4.86 0.04 95.95* 6/14/2017 3/22/2018 --7.96 --92.82 8/5/2013 --8.10 --94.89 3/4/2015 --6.39 --96.60 6/2/2016 --7.22 --95.77 12/22/2016 6/14/2017 3/22/2018 8/5/2013 --9.41 --92.86 3/4/2015 --7.05 --95.22 6/2/2016 --8.62 --93.65 12/22/2016 --9.97 --92.30 6/14/2017 --8.22 --94.05 3/22/2018 --7.43 --94.84 3/4/2015 --7.36 --94.60 6/2/2016 --8.53 --93.43 12/22/2016 --9.94 --92.02 6/14/2017 --8.50 --93.46 3/22/2018 --8.30 --93.66 3/4/2015 --8.28 --91.89 6/2/2016 --8.83 --91.34 12/22/2016 6/14/2017 3/22/2018 3/4/2015 --4.10 --81.72 6/2/2016 --5.90 --79.92 12/22/2016 6/14/2017 3/22/2018 3/4/2015 --9.21 --84.29 6/2/2016 --11.59 --81.91 12/22/2016 6/14/2017 3/22/2018 3/4/2015 --7.52 --87.80 6/2/2016 --9.14 --86.18 12/22/2016 6/14/2017 3/22/2018 3/4/2015 --7.12 --94.12 6/2/2016 --9.24 --92.00 12/22/2016 --10.77 --90.47 6/14/2017 --8.15 --93.09 3/22/2018 --9.34 --91.90 11/24/15 --8.46 --92.44 1/26/2016 --7.22 --93.68 6/2/2016 --8.30 --92.60 12/22/2016 6/14/2017 --8.31 --92.59 3/22/2018 Notes: 1. TOC = Top of well casing. 2. * denotes groundwater elevation corrected for presence of free product calculated by: [(TOC Elevation-Depth to Groundwater)+(0.76*Product thickness)] Well Not Measured Well Not Measured Well Not Measured Well Not Measured Well Not Measured Well Not Measured Well Not Measured Well Not Measured Well Not Measured Well Not Measured Well Not Measured Well Not Measured Well Not Measured Well Not MeasuredMW-8 MW-7 MW-6 MW-5 MW-4 DW-2 Well Not Measured 102.27 MW-10 MW-9 Well Not Measured Well Not Measured MW-2 100.78 94.08 Well Not Measured 102.99 MW-3 Well Not Measured MW-1 100.90 101.24 95.32 93.50 85.82 100.17 101.96 100.00 DW-1 TABLE 8 CURRENT GROUNDWATER ANALYTICAL RESULTS PANTRY #3471 4940 U.S. HIGHWAY 264 WEST WILSON, NORTH CAROLINA NCDEQ INCIDENT NO. 33892 BenzeneTolueneEthylbenzeneTotal XylenesTotal BTEXMTBENaphthaleneIPE1,2,4-Trimethylbenzene1,3,5-TrimethylbenzeneIsopropylbenzenen-Butylbenzenesec-Butylbenzenen-Propylbenzenep-IsopropyltolueneMW-1 3/22/18 1.9 <1.0 6.9 <3.0 8.8 <1.0 20 <1.0 0.70J 0.30J 4.0 6.3 5.2 6.5 0.44J MW-2 3/22/18 9.1 <0.50 <0.50 0.79 9.89 <0.50 2.2J <0.50 7.3 <0.50 1.8 0.41J 0.84 0.24J <0.50 MW-3 3/22/18 MW-4 3/22/18 MW-5 3/22/18 <0.50 <0.50 <0.50 <1.50 <3.00 22 <5.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 MW-6 3/22/18 <0.50 <0.50 <0.50 <1.50 <3.00 <0.50 <5.0 <0.50 0.24J <0.50 <0.50 0.15J 0.21J <0.50 <0.50 MW-7 3/22/18 MW-8 3/22/18 MW-9 3/22/18 MW-10 3/22/18 DW-1 3/22/18 1.5 <1.0 <1.0 <3.0 1.5 240 <10 2.7 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 DW-2 3/22/18 1 600 600 500 NE 20 6 70 400 400 70 70 70 70 25 11.9 3.6 250 4,500 NE 190 120 NE NE 1,300 27 4,200 NE 17,000 NE 5,000 260,000 84,500 85,500 NE 20,000 6,000 70,000 28,500 25,000 25,000 6,900 8,500 30,000 11,700 Notes: 1. "<" denotes compound not detected above laboratory method detection limit. 2. Concentrations are reported in micrograms per liter (ug/l) = parts per billion. 3. Concentrations in bold print equal or exceed the 2B Surface Water Standard x 10 (based on Human Health Standards). 4. NCDEQ = North Carolina Department of Environmental Quality. 5. GCL = Gross Contaminantion Level. 6. MTBE = Methyl Tertiary Butyl Ether. 7. Gross Contamination Levels for Groundwater are referenced in the "Guidelines for Assessment and Corrective Action for UST Releases", November 2008, updated January 2010. 8. NE denotes not established. 9. J denotes estimated concentration by the laboratory. Well Not Sampled Well Not Sampled Well Not Sampled Well Not Sampled Well Not Sampled GCLs Well Sampling Date EPA Method 6200B Well Not Sampled 2L Standard 2B Standard (x10) Well Not Sampled TABLE 9 HISTORICAL GROUNDWATER ANALYTICAL RESULTS PANTRY #3471 4940 U.S. HIGHWAY 264 WEST WILSON, NORTH CAROLINA NCDEQ INCIDENT NO. 33892 BenzeneTolueneEthylbenzeneTotal XylenesMTBENaphthalene01/20/10 810 13 470 1,710 <40 -- 02/19/10 940 61 610 2,493 7.3 890 08/05/13 3/4/15 38.6 21.4 133 9.3 0.31J 166 6/2/16 14 3.4 90 2.16J <1.0 170 12/22/16 7.9 0.90J 52 0.36J <1.0 120 6/14/17 2.3 0.69 40 0.45J <0.50 68 3/22/18 1.9 <1.0 6.9 <3.0 <1.0 20 11/16/10 <0.1 <0.1 <0.1 <0.1 <0.2 <0.1 3/4/15 1.8 <0.5 <0.5 <1.5 <0.5 0.27J 6/2/16 4.3 <0.50 <0.50 0.72J <0.50 <0.50 12/22/16 4.1 <0.50 <0.50 <1.50 <0.50 0.87 6/14/17 6.8 <0.50 <0.50 1.52J <0.50 2.3 3/22/18 9.1 <0.50 <0.50 0.79 <0.50 2.2J 8/5/13 3/4/15 33 <25 1,840 6,830 <25 1,500 6/2/16 12/22/16 6/14/17 3/22/18 8/5/13 6.5 23 2.1 12.1 43 0.61 3/4/15 0.46J <0.5 <0.5 <1.5 8.5 <0.5 6/2/16 <0.50 <0.50 <0.50 <1.50 2.4 <0.50 12/22/16 6/14/17 8/5/13 6.5 27 2.4 14.5 52 0.65 3/4/15 0.99 <0.5 <0.5 <1.5 39.4 0.29J 6/2/16 1.2 <0.50 <0.50 0.46J 17 <0.50 12/22/16 0.98 <0.50 <0.50 <1.50 26 2.1 6/14/17 0.66 <0.50 <0.50 <1.50 15 <1.0 3/22/18 <0.50 <0.50 <0.50 <1.50 22 <5.0 3/4/15 <0.5 <0.5 0.22J 0.83J <0.5 <0.5 6/2/16 <0.50 <0.50 <0.50 1.07J <0.50 1.4J 12/22/16 <0.50 <0.50 <0.50 0.26 J <0.50 4.8 6/14/17 <0.50 <0.50 <0.50 <1.50 <0.50 <1.0 3/22/18 <0.50 <0.50 <0.50 <1.50 <0.50 <5.0 3/4/15 0.83 <0.5 <0.5 0.18J 87 <0.5 6/2/16 0.46J <0.50 <0.50 <1.50 82 <0.50 12/22/16 6/14/17 3/22/18 Well Not Sampled MW-2 MW-4 MW-6 MW-5 MW-7 Well Not Sampled Well I.D.Sampling Date EPA Method 6200B 0.85 feet Free Product Well Not Sampled 0.58 feet Free Product 0.02 feet Free Product MW-1 MW-3 Well Not Sampled Well Not Sampled 0.04 feet Free Product Well Not Sampled Well Not Sampled TABLE 9 HISTORICAL GROUNDWATER ANALYTICAL RESULTS PANTRY #3471 4940 U.S. HIGHWAY 264 WEST WILSON, NORTH CAROLINA NCDEQ INCIDENT NO. 33892 BenzeneTolueneEthylbenzeneTotal XylenesMTBENaphthaleneWell I.D.Sampling Date EPA Method 6200B 3/4/15 <0.5 <0.5 <0.5 <1.5 <0.5 <0.5 6/2/16 <0.50 <0.50 <0.50 <1.50 <0.50 <0.50 12/22/16 6/14/17 3/22/18 3/4/15 <0.5 <0.5 <0.5 <1.5 <0.5 <0.5 6/2/16 <0.50 <0.50 <0.50 <1.50 <0.50 <0.50 12/22/16 6/14/17 3/22/18 3/4/15 <0.5 <0.5 <0.5 <1.5 1.8 <0.5 6/2/16 <0.50 <0.50 <0.50 <1.50 <0.50 <0.50 12/22/16 6/14/17 3/22/18 3/4/15 1.6 <0.5 <0.5 <1.5 211 <0.5 6/2/16 2.9 <2.5 <2.5 <7.5 450 3.0 12/22/16 2.3 <1.0 0.26J <1.50 280 2.8 6/14/17 3.6 <2.5 <2.5 2.2 J 260 13 3/22/18 1.5 <1.0 <1.0 <3.0 240 <10 11/24/15 3.1 <0.25 <0.25 <0.5 14.7 <1 1/26/16 <0.5 <0.5 <0.5 <1 1.2 <0.5 6/2/16 <0.50 <0.50 <0.50 <1.50 0.53 <0.50 12/22/16 6/14/17 <0.50 <0.50 <0.50 <1.50 0.43 J <1.0 3/22/18 1 600 600 500 20 6 11.9 3.6 250 4,500 190 120 5,000 260,000 84,500 85,500 20,000 6,000 Notes:1. "<" denotes compound not detected above laboratory method detection limit. 2. Concentrations are reported in micrograms per liter (ug/l) = parts per billion.3. Concentrations in bold print equal or exceed the 2B Surface Water Standard x 10 (based on Human Health Standards). 4. NCDEQ = North Carolina Department of Environmental Quality.5. GCL = Gross Contaminantion Level. 6. MTBE = Methyl Tertiary Butyl Ether.7. Gross Contamination Levels for Groundwater are referenced in the "Guidelines for Assessment and Corrective Action for UST Releases", November 2008, updated January 2010.8. J denotes estimated concentration by the laboratory. GCLs Well Not Sampled Well Not Sampled DW-2 DW-1 Well Not Sampled Well Not Sampled Well Not Sampled Well Not Sampled MW-10 2L Standard 2B Standard (x10) MW-9 MW-8 Well Not Sampled Well Not Sampled Well Not Sampled Well Not Sampled Well Not Sampled TABLE 10 WATER SUPPLY WELL ANALYTICAL RESULTS PANTRY #3471 4940 U.S. HIGHWAY 264 WEST WILSON, NORTH CAROLINA NCDEQ INCIDENT NO. 33892 Benzene Toluene Ethylbenzene Total Xylenes MTBE Naphthalene 11/24/15 <0.25 <0.25 <0.25 <0.5 <0.25 <1 6/2/16 <0.50 <0.50 <0.50 <1.50 <0.50 <0.50 12/22/16 <0.50 <0.50 <0.50 <1.50 <0.50 <0.50 6/14/17 <0.50 <0.50 <0.50 <1.50 <0.50 <1.0 3/22/18 1 600 600 500 20 6 5,000 260,000 84,500 85,500 20,000 6,000 Notes: 1. "<" denotes compound not detected above laboratory method detection limit. 2. Concentrations are reported in micrograms per liter (ug/l) = parts per billion. 3. Concentrations in bold print equal or exceed the NCDEQ 2L Standard (2L). 4. NCDEQ = North Carolina Department of Environmental Quality. 5. GCL = Gross Contaminantion Level. 6. MTBE = Methyl Tertiary Butyl Ether. 7. Gross Contamination Levels for Groundwater are referenced in the "Guidelines for Assessment and Corrective Action for UST Releases", November 2008, updated January 2010. NCDEQ 2L Standards GCLs EPA Method 6200BSampling DateWell I.D. PW-1 Well Not Sampled FIGURES FIGURE 1 USGS TOPOGRAPHIC MAP Pantry # 3471 4940 US Highway 264 West Wilson, North Carolina 2725 E. Millbrook Road, Suite 121 Raleigh, NC 27604 (919) 871-0999 PROJECT NO: 45.24639.3471 SCALE: 1” = 600’ DATE: 7/7/2009 SITE FIGURE 7 DW-1: DISSOLVED MTBE CONCENTRATIONS VERSUS DEPTH TO WATER THROUGH TIME PANTRY # 3471 4940 U.S. HIGHWAY 264 WEST WILSON, NORTH CAROLINA NCDEQ INCIDENT NO. 33892 0.00 2.00 4.00 6.00 8.00 10.00 12.00 0 50 100 150 200 250 300 350 400 450 500 3/4/15 6/2/16 12/22/16 6/14/17 3/22/18 Depth to Water (ft.)Dissolved MTBE Concentration (ug/L)Date Dissolved MTBE Concentration Depth to Water APPENDIX A HISTORICAL SOIL ANALYTICAL DATA AND SOIL SAMPLE LOCATION MAP TABLE 3 SOIL ANALYTICAL DATA PANTRY #3471 4940 U.S. HIGHWAY 264 WEST WILSON, NORTH CAROLINA NCDEQ INCIDENT NO. 33892 BenzeneTolueneEthylbenzeneTotal XylenesMTBENaphthaleneAcetone1,2,4-Trimethylbenzene1,3,5-Trimethylbenzenep-IsopropyltolueneIsopropylbenzenen-Butylbenzenesec-Butylbenzenen-PropylbenzeneMethylene ChlorideSD-10 7 11/30/15 74.1 <0.100 <0.113 0.12J <0.226 <0.0941 0.956 <0.627 1.67 0.269J 0.407 0.222J 0.95 0.589 0.429 <0.188 SD-11 7 11/30/15 26.7 <0.0019 <0.0022 <0.0022 <0.0043 <0.0018 <0.0014 <0.0121 <0.0024 <0.0022 <0.0020 <0.0023 <0.0022 <0.0019 <0.0020 0.0087J SD-13 7 11/30/15 12.6 <0.0022 <0.0024 <0.0024 <0.0049 <0.0020 0.004J <0.0135 <0.0027 <0.0024 <0.0023 <0.0026 <0.0024 <0.0022 <0.0023 0.0065J SD-17 7 11/30/15 N/A <0.0020 <0.0022 <0.0022 <0.0044 <0.0018 <0.0015 0.0517J <0.0024 <0.0022 <0.0021 <0.0023 <0.0022 <0.0020 <0.0021 0.0126J SD-19 4 11/30/15 0.1 <0.0020 <0.0023 <0.0023 <0.0046 <0.0019 <0.0015 0.0317J <0.0026 <0.0023 <0.0022 <0.0024 <0.0023 <0.0020 <0.0022 0.0043J SD-25 5 11/30/15 0.8 <0.0016 <0.0017 <0.0017 <0.0035 <0.0015 <0.0012 0.0278J <0.0019 <0.0017 <0.0016 <0.0018 <0.0017 <0.0016 <0.0016 <0.0029 SD-26 5.5 11/30/15 5.6 <0.0018 <0.002 <0.002 <0.0039 <0.0016 <0.0013 0.0131J <0.0022 <0.0020 <0.0019 <0.0021 <0.0020 <0.0018 <0.0019 <0.0033 SK-25 7 11/30/15 1.4 <0.0022 <0.0025 <0.0025 <0.0049 <0.0020 <0.0016 0.0177J <0.0027 <0.0025 <0.0023 <0.0026 <0.0025 <0.0022 <0.0023 0.0083J SK-30 7 11/30/15 3.7 <0.0021 <0.0024 <0.0024 <0.0048 <0.0020 <0.0016 0.0249J <0.0027 <0.0024 <0.0023 <0.0025 <0.0024 <0.0021 <0.0023 0.0128J 0.0056 4.3 4.9 4.6 0.091 0.16 24 8.5 8.3 0.12 1.7 4.3 3.3 1.7 0.02 18 1,200 1,560 3,129 350 313 14,000 782 782 100 1,564 626 626 626 85 164 32,000 40,000 81,760 3,100 8,176 360,000 20,440 20,440 4,000 40,880 16,350 16,350 16,350 763 Benzo(a) anthraceneBenzo(a) pyreneBenzo(b) fluorantheneChryseneFluor-anthenePhenanthrenePyrene1-Methylnaphthalene2-MethylnaphthaleneC5-C8 AliphaticsC9-C18 AliphaticsC19-C36 AliphaticsC9-C22 AromaticsSD-10 7 11/30/15 74.1 <0.0797 <0.0823 <0.0745 <0.0575 <0.0627 <0.0719 <0.0732 0.149J 0.228J 10.9 318.6 <105 184.3 SD-11 7 11/30/15 26.7 <0.0783 <0.0808 <0.0731 <0.0565 <0.0616 <0.0706 <0.0719 <0.110 <0.0911 <3.5 <16.3 <12.8 <16.3 SD-13 7 11/30/15 12.6 <0.0857 <0.0885 <0.0800 <0.0618 <0.0674 <0.0772 <0.0786 <0.121 <0.0997 <3.8 <17.8 <14.0 <17.8 SD-17 7 11/30/15 N/A <0.0701 <0.0724 <0.0655 <0.0506 <0.0552 <0.0632 <0.0643 <0.0988 <0.0816 <2.6 44.9 <11.5 22.4 SD-19 4 11/30/15 0.1 <0.0641 <0.0662 <0.0599 <0.0463 <0.0505 <0.0578 <0.0589 <0.0904 <0.0747 <4.1 <14.6 <10.5 <14.6 SD-25 5 11/30/15 0.8 <0.0634 <0.0655 <0.0593 <0.0457 0.0804J 0.0585J 0.0687J <0.0894 <0.0738 <4.1 <14.5 <10.4 <14.5 SD-26 5.5 11/30/15 5.6 <0.0644 <0.0665 <0.0601 <0.0464 <0.0506 <0.0580 <0.0591 <0.0907 <0.0749 <3.0 <13.6 <10.6 <13.6 SK-25 7 11/30/15 1.4 <0.0797 <0.0823 <0.0745 <0.0575 <0.0627 <0.0719 <0.0732 <0.112 <0.0928 <4.1 <17.2 <13.1 <17.2 SK-30 7 11/30/15 3.7 0.110J 0.090J 0.115J 0.117J 0.343J 0.175J 0.296J <0.119 <0.0985 <4.4 <18.3 <13.9 32 0.35 0.096 1.2 39 290 56 270 0.004 3.6 68 540 #31 0.88 0.088 0.88 88 620 469 469 20 63 939 1,500 31,000 469 8 0.78 8 780 16,400 12,264 12,264 100 1635 24,528 40,000 810,000 12,264 Notes: 1. Concentrations reported in milligrams per kilogram (mg/kg). 2. The MADEP VPH and EPH values were obtained from Table 10 in the "Guidelines for Assessment and corrective Action for UST Releases, dated July 15, 2008, updated October 2012. 3. MSCCs = Maximum Soil Contaminant Concentration 4. Bold concentrations equal or exceed Soil-to-Groundwater MSCCs. 5. # - Considered Immobile 6. "<" denotes compound not detected above laboratory method detection limit. 7. J value denotes estimated concentration by the laboratory. PID Reading (ppm) Industrial/Commercial MSCCs Soil-to-Groundwater MSCCs Residential MSCCs EPA Method 8260 Soil Sample ID Sample Depth (feet) Soil-to-Groundwater MSCCs Residential MSCCs Industrial/Commercial MSCCs EPA Method 8270 MADEP Methods for VPH and EPH Sampling Date PID Reading (ppm) Soil Sample ID Sample Depth (feet) Sampling Date TABLE 4 HISTORICAL SOIL ANALYTICAL DATA PANTRY #34714940 US HIGHWAY 264 WESTWILSON, NORTH CAROLINANCDENR FACILITY ID No. 0-035356ATC PROJECT No. 45.24639.3471 Boring I.D.Depth (feet)Sampling Date PID Reading Incident Phase TPH-GRO TPH-DRO Benzene Toluene Ethyl-benzene Total Xylenes Acetone C5-C8 Aliphatics C9-C18 Aliphatics C19-C36 Aliphatics C9-C22 Aromatics D9 3 11/9/2010 2.1 Site Check <0.097 <13 NA NA NA NA NA NA NA NA NA D10 3 11/9/2010 20.6 Site Check 0.66 400 NA NA NA NA NA NA NA NA NA D11 3 11/9/2010 10.4 Site Check <0.11 12 NA NA NA NA NA NA NA NA NA D12 3 11/9/2010 1.2 Site Check <0.11 <12 NA NA NA NA NA NA NA NA NA D13 3 11/9/2010 5.1 Site Check <0.09 42 NA NA NA NA NA NA NA NA NA D14 3 11/9/2010 1.5 Site Check <0.094 <11 NA NA NA NA NA NA NA NA NA D16 3 11/10/2010 <1 Site Check <0.099 <11 NA NA NA NA NA NA NA NA NA D17 3 11/1/1990 1.2 Site Check <0.11 11 NA NA NA NA NA NA NA NA NA D18 3 11/9/2010 <1 Site Check <0.1 <12 NA NA NA NA NA NA NA NA NA D19 3 11/9/2010 <1 Site Check <0.11 43 NA NA NA NA NA NA NA NA NA D20 3 11/9/2010 <1 Site Check <0.11 <14 NA NA NA NA NA NA NA NA NA D21 3 11/10/2010 <1 Site Check <0.11 <12 NA NA NA NA NA NA NA NA NA D22 3 11/10/2010 <1 Site Check <0.12 <13 NA NA NA NA NA NA NA NA NA D23 3 11/10/2010 <1 Site Check <0.12 <12 NA NA NA NA NA NA NA NA NA D24 3 11/10/2010 <1 Site Check <0.1 <12 NA NA NA NA NA NA NA NA NA D25 3 11/10/2010 <1 Site Check <0.11 32.3 NA NA NA NA NA NA NA NA NA D26 3 11/10/2010 <1 Site Check <0.12 18 NA NA NA NA NA NA NA NA NA D27 3 11/10/2010 <1 Site Check <0.086 <12 NA NA NA NA NA NA NA NA NA D28 3 11/10/2010 <1 Site Check <0.11 <11 NA NA NA NA NA NA NA NA NA K21 3 11/8/2010 <1 Site Check <0.096 <12 NA NA NA NA NA NA NA NA NA K22 3 11/8/2010 <1 Site Check <0.084 <11 NA NA NA NA NA NA NA NA NA K23 3 11/8/2010 <1 Site Check <0.086 <11 NA NA NA NA NA NA NA NA NA K24 3 11/8/2010 <1 Site Check <0.11 <13 NA NA NA NA NA NA NA NA NA K25 3 11/8/2010 <1 Site Check <0.1 11 NA NA NA NA NA NA NA NA NA K26 3 11/8/2010 <1 Site Check <0.1 <11 NA NA NA NA NA NA NA NA NA K27 3 11/8/2010 <1 Site Check <0.093 <12 NA NA NA NA NA NA NA NA NA K28 3 11/10/2010 1.5 Site Check <0.078 <11 NA NA NA NA NA NA NA NA NA K29 3 11/10/2010 33.7 Site Check <0.093 <11 NA NA NA NA NA NA NA NA NA K30 3 11/10/2010 56.0 Site Check <0.092 15 NA NA NA NA NA NA NA NA NA K31 3 11/10/2010 34.0 Site Check <0.1 <11 NA NA NA NA NA NA NA NA NA K32 3 11/10/2010 34.0 Site Check <0.11 <13 NA NA NA NA NA NA NA NA NA K33 3 11/10/2010 40.0 Site Check <0.12 <14 NA NA NA NA NA NA NA NA NA K34 3 11/10/2010 41.0 Site Check <0.1 <14 NA NA NA NA NA NA NA NA NA SB-1 0-2 6/18/09 NA Site Check 0.12 0.12 <0.0049 <0.0049 <0.0049 <0.0049 <0.0097 <2.6 ND 18 2.1 SB-1 4-6 6/18/09 NA Site Check 0.16 0.16 <0.0049 <0.0049 <0.0049 <0.0049 <0.0097 <2.6 ND 18 2.1 MW-3 0-4.5 8/2/13 0.4 Phase I LSA NA NA <0.0049 <0.0049 <0.0049 <0.0049 <0.0097 <2.6 ND 18 2.1 MW-4 0-5 8/2/13 0.0 Phase I LSA NA NA <0.0046 <0.0046 <0.0046 <0.0046 <0.0097 <2.7 <3.6 NA 3.2 MW-5 0-5 8/2/13 0.0 Phase I LSA NA NA <0.0046 <0.0046 <0.0046 <0.0046 0.1 16 11 NA 10 MW-5 5-9 8/2/13 0.0 Phase I LSA NA NA <0.0071 <0.0071 <0.0071 <0.0071 <0.14 <3.8 <5.1 NA 1.8 10 10 ------------------ ----0.0056 4.3 4.9 4.6 24 68 540 #31 ----18 1,200 1,560 3,129 14,000 939 1,500 31,000 469 ----164 32,000 40,000 81,760 360,000 24,528 40,000 810,000 12,264 Notes: 1. Concentrations reported in milligrams per kilogram (mg/kg). 2. Final C9-C18 Aliphatics values are equal to the sum of C9-C12 Aliphatics and C9-C18 Aliphatics as reported in the laboratory report3. Final C9-C22 Aromatics are equal to the sum of C11-C22 Aromatics and C9-C10 Aromatics as reported in the laboratory analytical report4. The MADEP VPH and EPH values were obtained from Table 10 in the "Guidelines for Assessment and corrective Action for UST Releases, dated July 15, 2008, updated October 2012. 5. NA = Not Analyzed.6. MSCCs = Maximum Soil Contaminant Concentration7. Bold concentrations equal or exceed the lowest applicable MSCCs or Cleanup Levels.8. # - Considered Immobile 9. "<" or ND = None detected above method detection limit. Industrial/Commercial MSCCs EPA Method:5030/8015 MADPE VPH/EPH8260B NCDENR Action Level Soil-to-Groundwater MSCCs Residential MSCCs APPENDIX B GEOLOGIC TRANSECT AND CROSS-SECTION MAPS (2015) APPENDIX C VACUUM TRUCK SPECIFICATIONS AND DISPOSAL WASTE MANIFESTS APPENDIX D HISTORICAL GROUNDWATER ELEVATION CONTOUR MAPS APPENDIX E LABORATORY ANALYTICAL RESULTS Page 1 of 25 Table of Contents Table of Contents Sample Summary 3 Case Narrative 4 Sample Results 5 18C1012-01 5 18C1012-02 7 18C1012-03 9 18C1012-04 11 18C1012-05 13 Sample Preparation Information 15 QC Data 16 Volatile Organic Compounds by GC/MS 16 B199682 16 Flag/Qualifier Summary 20 Certifications 21 Chain of Custody/Sample Receipt 23 Page 2 of 25 Table of Contents Page 3 of 25 Table of Contents Page 4 of 25 Table of Contents Page 5 of 25 Table of Contents Page 6 of 25 Table of Contents Page 7 of 25 Table of Contents Page 8 of 25 Table of Contents Page 9 of 25 Table of Contents Page 10 of 25 Table of Contents Page 11 of 25 Table of Contents Page 12 of 25 Table of Contents Page 13 of 25 Table of Contents Page 14 of 25 Table of Contents Page 15 of 25 Table of Contents Page 16 of 25 Table of Contents Page 17 of 25 Table of Contents Page 18 of 25 Table of Contents Page 19 of 25 Table of Contents Page 20 of 25 Table of Contents Page 21 of 25 Table of Contents Page 22 of 25 Table of Contents Page 23 of 25 Table of Contents Page 24 of 25 Table of Contents Page 25 of 25 Table of Contents