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
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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
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