WS-9069_44302_CA_MRP_20190731_MRP 07-31-2019

Groundwater Monitoring Report July 31, 2019
Pagetown Exxon Progress Project 1019076.001
Reidsville, Caswell County, North Carolina
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GROUNDWATER MONITORING REPORT
A SITE INFORMATION
Date of Report: July 31, 2019
Facility I.D.: 00-0-000004296
UST Incident Number (if known): 44302
Site Name: Pagetown Exxon
Site Location: 8035 Cherry Grove Road, Reidsville, North Carolina 27320
Nearest City/Town: Reidsville, North Carolina County: Caswell
UST Owner/Operator: Eden Oil Company, Inc.
Address: P.O. Box 1375, Reidsville, North Carolina 27323 Phone: [phone]
Property Owner: Inez Saunders Wrenn
Address: 8175 Cherry Grove Road, Reidsville, North Carolina 27320 Phone: [phone]
Property Occupant: Pagetown Exxon
Address: 8035 Cherry Grove Road, Reidsville, North Carolina 27320 Phone: [phone]
Consultant/Contractor: Progress Environmental, Inc.
Address: P.O. Box 5884, Winston-Salem, North Carolina 27113 Phone: [phone]
Attention: Mr. Jeffrey A. Ballsieper, L.G.
Drilling Contractor: 3D Environmental Investigations, Inc.
Address: 2157 Mocksville Highway, Statesville, North Carolina 28625 Phone: [phone]
Analytical Laboratory: Research and Analytical Laboratories, Inc.
Address: 106 Short Street, Kernersville, North Carolina 27284 Phone: [phone]
Release Information
Date Discovered: March 23, 2014
Latitude: N36.296375º Longitude: W79.476877º
Estimated Quantity of Release: Unknown
Cause of Release: Corrosion
Source of Release (e.g., Piping/UST): Kerosene UST
Sizes and contents of UST system(s) from which the release occurred): One 1,000-gallon kerosene UST (Table
B-1).
Risk Classification: High, Land Use Category: Commercial.
Groundwater Monitoring Report July 31, 2019
Pagetown Exxon Progress Project 1019076.001
Reidsville, Caswell County, North Carolina
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B EXECUTIVE SUMMARY
The site is located at 8035 Cherry Grove Road in Reidsville, Caswell County, North Carolina
(Figures 1 and 2). The site consists of a convenience store which stores petroleum products in
underground storage tanks (USTs) and aboveground storage tanks (ASTs) for retail sale. Formerly
kerosene and diesel fuel were stored in USTs. The kerosene and diesel fuel USTs were removed
following the discovery of a release in 2014. Three active USTs are present at the site and used to
store gasoline. The site is located in a commercial and residential area of rural Caswell County.
The surrounding properties are served by water-supply wells within 1,500 feet of the source area.
UST Closure Report
Progress prepared an Initial Abatement Action Report, dated July 24, 2014. The closure activities
included the removal of one 1,000-gallon kerosene UST and one 2,000-gallon diesel fuel UST.
Impacted soil was noted beneath the USTs and approximately 97.76 tons of impacted soil were
removed. Following the excavation of the contaminated soil, Progress collected soil samples (N-1, E-
1, S-1, W-1, and B-1) from the sidewalls and base of the excavation. The over-excavation activities
were limited due to the presence of the building to the south of the excavation and the physical limits
of the trackhoe. Laboratory analysis of risk-based soil samples S-1 and B-1 detected targeted
compounds above their respective Soil-to-Groundwater Maximum Soil Contaminant Concentrations
(MSCCs). The concentration of C9-C18 Aliphatics detected in soil sample S-1 exceeded its
Residential Soil Cleanup Level.
Limited Site Assessment
Based on the results of the soil and groundwater sampling completed during the initial abatement
activities, Progress completed a Phase II LSA Report, dated November 26, 2014. Permanent
monitoring wells (MW-1 through MW-4) were installed during the LSA activities. Laboratory
analysis of the groundwater samples collected from monitoring wells MW-2 through MW-4 did not
detect targeted compounds above their respective North Carolina 2L Groundwater Quality Standards
(NC2LGWQS). Approximately 0.69 feet of free product was detected in monitoring well MW-1 on
November 11, 2014. Twenty-two water-supply wells within 1,000 feet were identified during the
LSA, each of which is used as a drinking water source for their respective properties.
Free Product Recovery and Water-Supply Well Sampling
Progress completed a Free Product Recovery and Water-Supply Well Sampling Report, dated May
8, 2015. Progress completed a free product recovery event using mobile multi-phase extraction
(MMPE) from March 9 to March 13, 2015. Free product and groundwater were extracted from
monitoring well MW-1. The event extracted approximately 1,883 gallons of impacted groundwater
and 96.060 pounds or 15.36 gallons of product as vapor. The MMPE cost $5,948.25 and,
therefore, the cost per gallon of recovered contaminated groundwater was $3.16 per gallon. The
cost per gallon of recovered free product was $387.26 per gallon. On April 13, 2015 Progress
returned to the site to sample the existing monitoring well MW-1 or gauge free product thickness
in the monitoring well, as appropriate. Approximately 1.71 feet of free product was detected in
monitoring well MW-1; therefore, a groundwater sample was not collected. Progress also
collected groundwater samples from water-supply wells WSW-5, WSW-7, WSW-12, WSW-14,
WSW-15, WSW-20, and WSW-22 (Figure 4). Water-supply wells WSW-1 and WSW-21 are no
Groundwater Monitoring Report July 31, 2019
Pagetown Exxon Progress Project 1019076.001
Reidsville, Caswell County, North Carolina
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longer in use. A groundwater sample from water-supply well WSW-6 was submitted to the
laboratory; however, due to a power outage during the analysis of the sample it could not be
analyzed and the sample could not be re-analyzed based on the low remaining sample volume.
Laboratory analysis of the groundwater sample collected from water-supply wells WSW-5, WSW-
7, WSW-12, WSW-15, WSW-20, and WSW-22 did not detect targeted compounds above the
laboratory detection limits. Laboratory analysis of the groundwater sample collected from WSW-
14 detected benzene (21.7 µg/L) and total xylenes (31.6 µg/L). The concentration of benzene
exceeds its NC2LGWQS of 1 µg/L and the EPA Drinking Water Standard of 5 µg/L.
Water-Supply Well Sampling
Progress completed a Water-Supply Well Sampling Report, dated July 31, 2015. On July 6, 2015
Progress returned to the site to sample the surrounding water-supply wells and gauge
groundwater/free product levels in monitoring well MW-1, as appropriate. Approximately 5.10
feet of free product was detected in monitoring well MW-1. Progress collected groundwater
samples from water-supply wells WSW-2, WSW-3, WSW-5, WSW-6, WSW-7, WSW-9, WSW-
10, WSW-12, WSW-13, WSW-14, WSW-15, WSW-16, WSW-17, WSW-20, WSW-22, WSW-23,
and WSW-24 (Figure 4). Water-supply wells WSW-4, WSW-8, and WSW-21 are no longer in
use. Laboratory analysis of the groundwater samples collected from water-supply wells WSW-2,
WSW-3, WSW-5, WSW-6, WSW-7, WSW-9, WSW-10, WSW-12, WSW-13, WSW-14, WSW-
15, WSW-16, WSW-17, WSW-20, WSW-22, WSW-23, and WSW-24 did not detect targeted
compounds above the laboratory detection limits. Laboratory analysis of the groundwater sample
collected from WSW-14 detected benzene (143 µg/L), total xylenes (225 µg/L), and naphthalene
(17.0 µg/L). The concentrations of benzene and naphthalene exceed their respective NC2LGWQS
of 1 µg/L and 6 µg/L, respectively. In addition, the concentration of benzene exceeds the EPA
Drinking Water Standard of 5 µg/L.
Comprehensive Site Assessment
Progress completed a Comprehensive Site Assessment, dated August 20, 2015. Two additional
Type II permanent monitoring wells were installed during the CSA activities using a truck-
mounted drill rig and hollow-stem augers on July 23, 2015 by SAEDACCO. Monitoring wells
MW-5 and MW-6 were installed at the request of the NCDENR to determine whether the detected
petroleum-related compounds in a groundwater sample collected from water-supply well WSW-14
were the result of a release from the gasoline UST system. One Type III permanent monitoring
well (DW-1) was installed using the air-rotary drilling method on July 22 and 23, 2015 in an effort
to vertically delineate the extent of impacted groundwater.
Progress returned to the site on August 3, 2015 to collect groundwater samples from monitoring
wells MW-1 through MW-6 and DW-1. Monitoring well MW-1 was not sampled due to the
presence of approximately 5.51 feet of free product. The groundwater samples were decanted into
laboratory-supplied bottles and placed into a cooler packed with ice. The cooler was delivered
under chain-of-custody to Research and Analytical Laboratories, Inc. (R&A) in Kernersville,
North Carolina for testing. R&A analyzed the groundwater samples for volatile organic
compounds (VOCs) by EPA Method 602 and for semi-volatile organic compounds (SVOCs) using
EPA Method 625BNA plus ten tentatively identified compounds (TICs). Groundwater samples
collected from monitoring wells MW-5, MW-6, and DW-1 were also analyzed for volatile and
extractable petroleum hydrocarbons (VPH and EPH) by the Massachusetts Department of
Environmental Protection (MADEP) Methods.
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Pagetown Exxon Progress Project 1019076.001
Reidsville, Caswell County, North Carolina
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Approximately 0.69 feet of free product was measured in monitoring well MW-1 during the LSA
sampling event on November 11, 2014. On March 9, 2015, Progress gauged free product in
monitoring well MW-1 prior to the MMPE event. Approximately 2.92 feet of free product was
measured in monitoring well MW-1. On April 13, 2015 Progress returned to the site to sample the
surrounding water-supply wells and gauge groundwater/free product levels in monitoring well
MW-1, as appropriate. Approximately 1.71 feet of free product was measured in monitoring well
MW-1. Approximately 5.10 feet of free product was measured in monitoring well MW-1 during a
water-supply well sampling event on July 6, 2015. Approximately 5.55 feet of free product was
measured in monitoring well MW-1 during the CSA sampling event on August 3, 2015.
Based on the findings of the CSA, Progress made the following conclusions and recommendations:
Groundwater flow beneath the site appears to be flowing south-southwest;
Soil impacted above the Soil-to-Groundwater MSCCs appears to be located in the “smear
zone” or in close proximity and/or beneath on-site building and is not accessible based on
current site conditions;
Groundwater contamination in excess of the NC2LGWQS persists in on-site monitoring
wells MW-2, MW-5, and MW-6. Benzene was detected in the groundwater sample
collected from monitoring well MW-5 exceeds its GCL;
Free product has been measured in monitoring well MW-1. A free product thickness of
5.55 feet was measured in August 2015, at the time of groundwater sampling for the
preparation of the CSA. The free product thickness appears to be increasing since the
installation of monitoring well MW-1;
Based on the calculated groundwater flow direction and the concentrations detected in
groundwater samples collected from monitoring wells MW-2 and MW-5 it appears that an
off-site, undocumented release of petroleum may have occurred to the north-northeast of
the site;
The release related to the kerosene UST appears to have been adequately defined;
Because public water is not available in the vicinity of the site, free product recovery and
groundwater remediation will be required in an effort to decrease the concentrations of
petroleum-related compounds in the groundwater to below their respective NC2LGWQS;
Prior to a real estate transaction occurring, a Notice of Residual Petroleum (NORP) must
be filed with the Caswell County Register of Deeds. Written permission would be required
from the current property owner prior to Progress filing a NORP on the subject site.
Progress recommends that the current property owner be notified of the findings of this
assessment and that a copy of this report be submitted to the NCDENR;
Prepare and submit a Corrective Action Plan to address the continued free product and
dissolved phase petroleum groundwater contamination; and,
Groundwater Monitoring Report July 31, 2019
Pagetown Exxon Progress Project 1019076.001
Reidsville, Caswell County, North Carolina
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Provide a copy of this report to the property owner.
Site Check Report
Based on the evidence of a gasoline release, the NCDENR requested that a Site Check Report be
completed for the site. On December 9, 2015, Progress advanced sixteen soil borings (GP-1
through GP-16, Figure 13) to determine whether the soil has been adversely affected by the current
gasoline UST system located at the site. Soil borings GP-1 and GP-3 were advanced below the
sumps located beneath each of the dispensers. Soil borings GP-2 and GP-4 through GP-7 were
advanced along the fuel distribution lines. Soil borings GP-8 through GP-16 were advanced in the
vicinity of the gasoline USTs. Each soil sample was collected by driving a five-foot long, 2.25-
inch sampling probe into the soil. In order to access the soil beneath the dispensers, the soil
borings at those locations were drilled at an approximate 45 degree angle.
One soil sample from each soil boring was submitted to a North Carolina certified laboratory for
analysis. The soil sample selected for laboratory analysis from each boring was selected based on
the boring termination depth. Based on historical groundwater data and the estimated depth to
groundwater observed during the groundwater sampling and drilling activities, each soil sample
selected for laboratory analysis was collected from depths ranging from approximately five to
fifteen feet bls. The selected soil sample from each boring was placed into laboratory prepared
containers and then into a cooler packed with ice and delivered under chain-of-custody to Research
and Analytical Laboratories, Inc. (R&A) in Kernersville, North Carolina. Each soil sample was
analyzed for gasoline range total petroleum hydrocarbons (TPH) using EPA Method 8015/5035.
Based on the results of the laboratory testing, the Site Check Report identified evidence of gasoline
range TPH in the immediate vicinity of the gasoline dispensers. The source of the soil contamination
is not known. Based on the results of the annual line tightness testing, the reported nightly electronic
inventory reporting system for the USTs, and the electronic line leak detector system, an active leak
does not appear to be occurring. Double walled lines were installed at the site in 2001 as a
preventative measure as the site water-supply well is located slightly more than 100 feet from the
UST system. Furthermore, sumps are located beneath each dispenser, and evidence of gasoline
releases to the sumps was not noted at the time of the completion of the Site Check activities.
Ethanol, a relatively recent additive to gasoline, has not been detected in the groundwater samples
collected from the on-site monitoring wells.
Pre-CAP Monitoring Report
Progress completed a Pre-CAP Monitoring Report, dated October 5, 2016. On September 8, 2016
Progress returned to the site to sample the existing monitoring and recovery wells and to gauge
water/free product levels, as appropriate. Approximately 0.44 feet of free product was detected in
monitoring well MW-1. Groundwater samples were collected from monitoring wells MW-2
through MW-8, DW-1 and DW-2. Groundwater samples were also collected from water-supply
wells 1, 5, 6, 7, 12, 14, 15, 16, 20, and 22.
The laboratory analyzed the groundwater samples collected from monitoring wells MW-2 through
MW-6 and DW-1 for VOCs by Standard Method 6200B plus isopropyl ether (IPE), ethylene
dibromide EDB, and MTBE and for EDB. The groundwater samples collected from monitoring
wells MW-7, MW-8, and DW-2 were analyzed using Standard Method 6200B only. Groundwater
sample analytical results are included in Table B-4.
Groundwater Monitoring Report July 31, 2019
Pagetown Exxon Progress Project 1019076.001
Reidsville, Caswell County, North Carolina
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Laboratory analysis of the groundwater samples collected from monitoring wells MW-3, MW-6,
MW-7, MW-8, DW-1, and DW-2 and water-supply wells 1, 5, 6, 7, 12, 15, 16, 20, and 22 did not
detect targeted compounds above the their respective NC2LGWQS.
Laboratory analysis of the groundwater samples collected from monitoring wells MW-2, MW-4,
MW-5 and (WSW-14, well identification number later changed to WSW-15) detected various
targeted compounds above the their respective NC2LGWQS; however, the concentrations do not
exceed the applicable North Carolina risk-based Gross Contamination Levels (GCLs) except for
the concentration of benzene detected in monitoring well MW-5.
Groundwater Monitoring Report
Progress completed a Groundwater Monitoring Report, dated July 26, 2017. One Type II
permanent monitoring well was installed in the approximate location requested by the NCDEQ
using a truck-mounted drill rig and hollow-stem augers on June 2, 2017 by 3D Environmental
Investigations, LLC. The monitoring well was installed at the request of the NCDEQ to determine
the horizontal extent of the impacted groundwater beneath the site.
Progress was on site on June 20, 2017 to collect groundwater samples from monitoring wells MW-
2 through MW-9 and DW-1 and DW-2. Water samples were also collected from water-supply
wells WSW-1, WSW-5, WSW-6, WSW-14 (later changed to WSW-15), and WSW-20. A
groundwater sample was not collected from monitoring well MW-1, as approximately 2.00 feet of
free product was measured in the well at the time of gauging. The laboratory analyzed the
groundwater samples for VOCs by Standard Method 6200B.
Laboratory analysis of the groundwater samples collected from monitoring wells MW-3,
MW-6, MW-8, MW-9, DW-1, and DW-2 did not detect targeted compounds at
concentrations exceeding their respective NC2LGWQS. Laboratory analysis of the water
samples collected from water-supply wells WSW-1, WSW5, WSW-6, and WSW-20 did
not detect targeted compounds at concentrations exceeding their respective NC2LGWQS
or the applicable US EPA Drinking Water Standards.
Laboratory analysis of the groundwater sample collected from monitoring well MW-2
detected benzene (38.3 ug/L), 1,2-dichloroethane (1.12 ug/L), naphthalene (105 ug/L),
1,2,4-trimethylbenzene (421 ug/L), and total xylenes (807 ug/L) at concentrations
exceeding their respective NC2LGWQS.
Laboratory analysis of the groundwater sample collected from monitoring well MW-4
detected naphthalene (22.8 ug/L) at a concentration exceeding its NC2LGWQS.
Laboratory analysis of the groundwater sample collected from monitoring well MW-5
detected benzene (3,550 ug/L), ethylbenzene (3,260 ug/L) isopropylbenzene (118 ug/L),
IPE (686 ug/L), MTBE (4,690 ug/L), naphthalene (530 ug/L), n-propylbenzene (418 ug/L),
toluene (34,700 ug/L), 1,2,4-trimethylbenzene (2,260 ug/L), 1,3,5-trimethylbenzene (960
ug/L), and total xylenes (18,000 ug/L) at concentrations exceeding their respective
NC2LGWQS.
Groundwater Monitoring Report July 31, 2019
Pagetown Exxon Progress Project 1019076.001
Reidsville, Caswell County, North Carolina
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Laboratory analysis of the groundwater sample collected from monitoring well MW-7
detected MTBE (63.6 ug/L) at a concentration that exceeds its NC2LGWQS.
Laboratory analysis of the groundwater sample collected from water-supply well WSW-14
(later changed to WSW-15) detected benzene (3.05 ug/L) and 1,2-dichloroethane (1.46
ug/L) at concentrations that exceed their respective NC2LGWQS. Please note, the
concentrations detected in the water sample collected from water-supply well WSW-14 do
not exceed the applicable US EPA Drinking Water Standards.
Free Product Gauging
Approximately 0.69 feet of free product was measured in monitoring well MW-1 during the LSA
sampling event on November 11, 2014.
On March 9, 2015, Progress gauged free product in monitoring well MW-1 prior to the MMPE
event. Approximately 2.92 feet of free product were measured in monitoring well MW-1.
On April 13, 2015 Progress returned to the site to sample the surrounding water-supply wells and
gauge groundwater/free product levels in monitoring well MW-1, as appropriate. Approximately
1.71 feet of free product were measured in monitoring well MW-1.
Approximately 5.10 feet of free product were measured in monitoring well MW-1 during a water-
supply well sampling event on July 6, 2015.
Approximately 5.55 feet of free product were measured in monitoring well MW-1 during the CSA
sampling event on August 3, 2015, and 0.80 feet on March 15, 2016.
On September 8, 2016 Progress returned to the site to sample the existing monitoring wells and
gauge water/free product levels in the monitoring wells, as appropriate. Approximately 0.44 feet
of free product was identified in monitoring well MW-1.
On June 20, 2017 Progress returned to the site to sample the existing monitoring wells and gauge
water/free product levels in the monitoring wells, as appropriate. Approximately 2.00 feet of free
product were identified in monitoring well MW-1.
On May 10, 2019 Progress returned to the site to sample the existing monitoring wells and gauge
water/free product levels in the monitoring wells, as appropriate. Approximately 0.10 feet of free
product was identified in monitoring well MW-1.
Other Potential Sources
Progress has completed a Phase I Environmental Site Assessment at the site, but has researched
past uses via interviews and limited aerial photography review. Based on the information gathered
to date, Progress understands that a former gasoline service station was located immediately to the
east of the site across Pagetown Road. This service station was reportedly operated from the
1950s to as late as the 1980s. The USTs were reportedly removed in the late 1980s. Additionally,
a former service station was located immediately north and adjacent to the site across Cherry
Grove Road. The gasoline USTs were removed from the site; however, the date of the removal of
Groundwater Monitoring Report July 31, 2019
Pagetown Exxon Progress Project 1019076.001
Reidsville, Caswell County, North Carolina
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the USTs is unknown. Additionally, an automotive repair facility is located approximately 500
feet to the site to the northeast.
Field Activities
Progress was on site on May 10, 2019 to collect groundwater samples from monitoring wells MW-
1 through MW-9, DW-1, and DW-2. Water samples were also collected from water-supply wells
WSW-1, WSW-5, WSW-7, WSW-12, WSW-15, WSW-20, and WSW-22. A groundwater sample
was not collected from monitoring well MW-1, as approximately 0.10 feet of free product was
measured in the well at the time of gauging. Prior to sampling, the wells were developed until the
development water ran relatively clear, and the well was purged of an additional three casing
volumes of water prior to sampling. The depth to the groundwater surface in each of the wells was
measured prior to well purging using a decontaminated electric sounder. The wells were surveyed
by Progress using a relative benchmark that was arbitrarily given an elevation of 100 feet (top of
casing of monitoring well MW-3). The elevations of the monitoring wells and the groundwater
surface are both relative to that benchmark.
The groundwater samples were decanted into laboratory-supplied bottles and placed into a cooler
packed with ice. The cooler was delivered under chain-of-custody to Research and Analytical
Laboratories, Inc. (R&A) in Kernersville, North Carolina for testing. R&A analyzed the
groundwater samples for VOCs by Standard Method 6200B. A summary of the groundwater
sample analytical results is included in Table B-4.
Laboratory analysis of the groundwater samples collected from monitoring wells MW-3,
MW-6, MW-8, MW-9, DW-1, and DW-2 did not detect targeted compounds at
concentrations exceeding their respective NC2LGWQS. Laboratory analysis of the water
samples collected from water-supply wells WSW-1, WSW-5, WSW-7, WSW-12, WSW-
20, and WSW-22 did not detect targeted compounds at concentrations exceeding their
respective NC2LGWQS or the applicable US EPA Drinking Water Standards.
Laboratory analysis of the groundwater sample collected from monitoring well MW-2
detected benzene (49.2 ug/L), naphthalene (174 ug/L), 1,2,4-trimethylbenzene (558 ug/L),
and total xylenes (1,160 ug/L) at concentrations exceeding their respective NC2LGWQS.
Laboratory analysis of the groundwater sample collected from monitoring well MW-4
detected naphthalene (48.4 ug/L) at a concentration exceeding its NC2LGWQS.
Laboratory analysis of the groundwater sample collected from monitoring well MW-5
detected benzene (2,810 ug/L), ethylbenzene (2,330 ug/L) isopropylbenzene (145 ug/L),
IPE (264 ug/L), MTBE (1,280 ug/L), naphthalene (5,730 ug/L), n-propylbenzene (309
ug/L), toluene (19,000 ug/L), 1,2,4-trimethylbenzene (2,410 ug/L), 1,3,5-trimethylbenzene
(570 ug/L), and total xylenes (16,600 ug/L) at concentrations exceeding their respective
NC2LGWQS.
Laboratory analysis of the groundwater sample collected from monitoring well MW-7
detected MTBE (63.4 ug/L) at a concentration that exceeds its NC2LGWQS.
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Pagetown Exxon Progress Project 1019076.001
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Laboratory analysis of the groundwater sample collected from water-supply well WSW-15
detected benzene (4.43 ug/L) at a concentration that exceeds its NC2LGWQS. Please
note, the concentrations detected in the water sample collected from water-supply well
WSW-15 do not exceed the applicable US EPA Drinking Water Standards.
Based on the results of the groundwater sampling event, Progress makes the following conclusions
and recommendations:
Progress was on site on May 10, 2019 to collect groundwater samples from monitoring
wells MW-1 through MW-9, DW-1, and DW-2. Water samples were also collected from
water-supply wells WSW-1, WSW-5, WSW-7, WSW-12, WSW-15, WSW-20, and WSW-
22.
A groundwater sample was not collected from monitoring well MW-1, as approximately
0.10 feet of free product was measured in the well at the time of gauging.
Laboratory analysis of the groundwater samples collected from monitoring wells MW-3,
MW-6, MW-8, MW-9, DW-1, and DW-2 did not detect targeted compounds above their
respective NC2LGWQS. Laboratory analysis of the groundwater samples collected from
monitoring wells MW-2, MW-4, MW-5, and MW-7 detected targeted compounds above
their respective NC2LGWQS.
Laboratory analysis of water samples collected from water-supply wells WSW-1, WSW-5,
WSW-7, WSW-12, WSW-20, and WSW-22 did not detect targeted compounds above their
respective NC2LGWQS or US EPA Drinking Water Standards;
Laboratory analysis of the groundwater sample collected from water-supply well WSW-15
detected benzene at a concentration that exceeds its NC2LGWQS. Please note, the
concentration detected in the water sample collected from water-supply well WSW-15
does not exceed the applicable US EPA Drinking Water Standards;
Kerosene impacted soil above the Soil-to-Groundwater MSCCs appears to be located in
close proximity and/or beneath on-site building and is not accessible based on current site
conditions in the vicinity of the former kerosene UST;
Gasoline contamination in the soil in excess of the TPH Action Level or Soil-to-
Groundwater MSCCs persists in the vicinity of the fuel dispensing lines. Based on the
tank and line tightness testing, the current UST system does not appear to be leaking.
Additionally, the fuel distribution lines have been upgraded to include double walled
fiberglass lines and plastic sumps beneath the fuel dispensers. Based on calculations, the
impacted area of contaminated soil encompasses approximately 800 square feet
immediately beneath the canopy. Assuming an approximate depth to the water table of 16
feet and an unaffected overburden of two feet there is approximately 11,200 cubic feet or
414 cubic yards of impacted soil in the vicinity of the dispensers. Using a multiplier of 1.5
(cubic yards to tons), Progress estimates that there is approximately 621 tons of
contaminated soil at the site. It appears that the contaminant plume is adequately defined
and migrating in a southwesterly direction;
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The extent of groundwater contamination exceeding the NC2LGWQS is estimated to be
approximately 14,000 square feet. Assuming a 15 foot thick shallow aquifer and a 30%
effective porosity, Progress estimates that there is approximately 471,000 gallons of
groundwater beneath the site that is impacted at concentrations exceeding the
NC2LGWQS;
Measured free product thicknesses in monitoring well MW-1, located proximal to the
kerosene release, have decreased significantly;
Contaminant concentrations in monitoring well MW-2, located crossgradient of the
historic gasoline release at the site appear to be increasing slightly;
Contaminant concentrations in monitoring well MW-5, located proximal to an historic
gasoline release at the site, are generally decreasing;
Groundwater impacts to the nearby water-supply well (WSW-15) do not appear to be
related to the release at the site, and is likely related to one or more identified potential
petroleum sources in the vicinity of the site. Please note, the most recent resident of the
property served drinking water by water supply well WSW-15 has passed away and the
residence has remained unoccupied. The residence was being provided bottled water prior
to her death;
Because the soil contamination is located beneath the active gasoline dispensing system
which does not appear to be leaking, it is Progress’ opinion that a remedial strategy should
consist of in-situ treatment for both soil and groundwater contamination;
In light of recent technological advancements in the bio-remediation industry, Progress
would recommend the implementation of a bio-remediation plan that would include
temporary injection points installed proximal to the dispensing island to address soil
contamination and permanent inject points in a determined grid to address groundwater
contamination; and,
Because of the groundwater contamination in the area and absence of public water
supplies in the area, Progress would recommend that the water-supply wells within 250 to
500 feet be equipped with point of entry systems that address both petroleum and
biological contamination. It may be possible to consolidate the number of water-supply
wells in the southwesterly direction from the source area to minimize the number of POE
systems to be installed. Progress would recommend that the soil contamination would be
addressed with a series of soil borings injected to various depths (5,10, and 15 feet bls)
and a bioremediation product injected into the boreholes through the drilling rods.
Progress estimates that there would be six injection locations, each with at least three
depths of injection. To address groundwater contamination, Progress estimates that up to
21 injection points will be installed as part of the bio-remediation activities. A Proposed
Injection Plan Map is included as Figure 15. The amount of bioremediation product will
be calculated for each injection point based on the inferred contaminant concentration at
that point.
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C TABLE OF CONTENTS
A SITE INFORMATION................................................................................................................................ 1
B EXECUTIVE SUMMARY ......................................................................................................................... 2
C TABLE OF CONTENTS .......................................................................................................................... 11
D SITE HISTORY AND CHARACTERIZATION................................................................................... 12
E PRESENTATION OF CURRENT SITE ASSESSMENT INFORMATION/COMPARISON
TO HISTORICAL ASSESSMENT INFORMATION .......................................................................... 12
F FREE PRODUCT REMOVAL ................................................................................................................ 21
G MONITORED NATURAL ATTENUATION/NATURAL SOURCE ZONE DEPLETION
STATUS ....................................................................................................................................................... 21
H CONCLUSIONS ........................................................................................................................................ 21
I STATEMENTS AND CERTIFICATION .............................................................................................. 23
FIGURES
Figure 1 – Topographic Site Map
Figure 2 – Site Map
Figure 3 – Potentiometric Surface Map
Figure 4 – Water-Supply Well Location Map
Figure 5 – Groundwater Analytical Results Map
Figure 6 – Benzene Isopleth Map
Figure 7 – Total BTEX Isopleth Map
Figure 8 – MTBE Isopleth Map
Figure 9 – Adjacent Property Owners
Figure 10 – Cross Section Location Map
Figure 11 – Cross Section A to A'
Figure 12 – Cross Section B to B'
Figure 13 – Soil Sample Location Map
Figure 14 – Additional Potential Petroleum Sources Map
Figure 15 – Proposed Injection Plan Map
TABLES AND CHARTS
Table B-1 – Site History, UST/AST System Information
Table B-2 – Site History, UST Owner/Operator Information
Table B-3 -- Summary of Soil Analytical Results
Table B-4 – Summary of Recent Groundwater Analytical Results
Table B-4A – Field Parameters
Chart MW-1 Free Product Thickness vs. Depth to Water
Table B-5 – Water-Supply Well Information
Table B-6 – Adjacent Property Owner Information
Table B-7 – Well Construction Information and Historical Groundwater Elevations
Table B-8 – MMPE Results
Table B-9 – MMPE Results
APPENDIX
Groundwater Monitoring Well Sampling Data Sheets
Laboratory Analytical Reports and Chain-of-Custody Records
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D SITE HISTORY AND CHARACTERIZATION
The site is located at 8035 Cherry Grove Road in Reidsville, Caswell County, North Carolina
(Figures 1 and 2). The site consists of a convenience store which stores petroleum products in
underground storage tanks (USTs) and aboveground storage tanks (ASTs) for retail sale. Formerly
kerosene and diesel fuel were stored in USTs. The kerosene and diesel fuel USTs were removed
following the discovery of a release in 2014. Three active USTs are present at the site and used to
store gasoline. The site is located in a commercial and residential area of rural Caswell County.
The surrounding properties are served by water-supply wells within 1,500 feet of the source area.
Progress previously completed an Initial Abatement Action Report, dated July 24, 2014; a Phase II
Limited Site Assessment (LSA), dated November 26, 2014; a Free Product Recovery and Water-
Supply Sampling Report dated May 8, 2015; and, a Water-Supply Well Sampling Report, dated
July 31, 2015. The NCDEQ issued a Notice of Regulatory Requirements (NORR), dated
December 4, 2014, requiring that a Comprehensive Site Assessment (CSA) be completed for the
site. Following discussions with the NCDEQ, it was determined that prior to completing a CSA,
free product recovery activities were to be performed and the nearby water-supply wells sampled.
A CSA was submitted to the NCDEQ on August 20, 2015. A description of the former UST
systems is listed in Table B-1 below. Figure 2 depicts the site and the location of the monitoring
wells.
Table B-1
Site History, UST/AST System Information
Tank
No.
Installation
Date
Capacity
(gallons)
Construction
Materials
Dimensions
(inches)
Removal
Date Contents Previous
Contents
1 4/30/1989 6,000 Steel 63” x 216”Present Gasoline Gasoline
2 4/30/1989 8,000 Steel 63” x 216” Present Gasoline Gasoline
3 4/30/1989 4,000 Steel 63” x 216” Present Gasoline Gasoline
4 4/30/1989 2,000 Steel (STP-3) 64” x 12’ 6/16/14 Diesel Diesel
5 4/30/1989 1,000 Steel (STP-3) 64” x 6’ 6/16/14 Kerosene Kerosene
6 2014 (AST)500 Steel 64” x 12’ Present Kerosene Kerosene
7 2014 (AST)1,500 Diesel Diesel
8 Unknown 2,000 Steel Unknown 1989 Gasoline Gasoline
9 Unknown 2,000 Steel Unknown 1989 Gasoline Gasoline
10 Unknown 1,000 Steel Unknown 1989 Gasoline Gasoline
Please note, a documented release has occurred from the kerosene UST that was removed along
with the diesel fuel UST in 2014. The kerosene had a catastrophic release that was detected by
the leak detection system. A suspected release has occurred with the gasoline UST system. The
source of the gasoline release is unknown but is suspected to be the result of leaking product lines.
The fuel distribution lines have been replaced with double walled lines and sumps have been
installed beneath each of the dispensers.
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Table B-2
Site History, UST Owner/Operator Information
Owner’s Name Address Phone Number Dates of Ownership
Eden Oil Company, Inc. P.O. Box 1375
Reidsville, NC 27323 [phone] 1989-Present
1.UST Closure Report
Progress prepared an Initial Abatement Action Report, dated July 24, 2014. The closure activities
included the removal of one 1,000-gallon kerosene UST and one 2,000-gallon diesel fuel UST.
Impacted soil was noted beneath the USTs and approximately 97.76 tons of impacted soil were
removed. Following the excavation of the contaminated soil, Progress collected soil samples (N-1, E-
1, S-1, W-1, and B-1) from the sidewalls and base of the excavation. The over-excavation activities
were limited due to the presence of the building to the south of the excavation and the physical limits
of the trackhoe. Laboratory analysis of risk-based soil samples S-1 and B-1 detected targeted
compounds above their respective Soil-to-Groundwater Maximum Soil Contaminant Concentrations
(MSCCs). The concentration of C9-C18 Aliphatics detected in soil sample S-1 exceeded its
Residential Soil Cleanup Level.
2.Limited Site Assessment
Based on the results of the soil and groundwater sampling completed during the initial abatement
activities, Progress completed a Phase II LSA Report, dated November 26, 2014. Permanent
monitoring wells (MW-1 through MW-4) were installed during the LSA activities. Laboratory
analysis of the groundwater samples collected from monitoring wells MW-2 through MW-4 did not
detect targeted compounds above their respective North Carolina 2L Groundwater Quality Standards
(NC2LGWQS). Approximately 0.69 feet of free product was detected in monitoring well MW-1 on
November 11, 2014. Twenty-two water-supply wells within 1,000 feet were identified during the
LSA, each of which is used as a drinking water source for their respective properties.
3.Free Product Recovery and Water-Supply Well Sampling
Progress completed a Free Product Recovery and Water-Supply Well Sampling Report, dated May
8, 2015. Progress completed a free product recovery event using mobile multi-phase extraction
(MMPE) from March 9 to March 13, 2015. Free product and groundwater were extracted from
monitoring well MW-1. The event extracted approximately 1,883 gallons of impacted groundwater
and 96.060 pounds or 15.36 gallons of product as vapor. The MMPE cost $5,948.25 and,
therefore, the cost per gallon of recovered contaminated groundwater was $3.16 per gallon. The
cost per gallon of recovered free product was $387.26 per gallon. On April 13, 2015 Progress
returned to the site to sample the existing monitoring well MW-1 or gauge free product thickness
in the monitoring well, as appropriate. Approximately 1.71 feet of free product was detected in
monitoring well MW-1; therefore, a groundwater sample was not collected. Progress also
collected groundwater samples from water-supply wells WSW-5, WSW-7, WSW-12, WSW-14,
WSW-15, WSW-20, and WSW-22 (Figure 4). Water-supply wells WSW-1 and WSW-21 are no
longer in use. A groundwater sample from water-supply well WSW-6 was submitted to the
laboratory; however, due to a power outage during the analysis of the sample it could not be
analyzed and the sample could not be re-analyzed based on the low remaining sample volume.
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Laboratory analysis of the groundwater sample collected from water-supply wells WSW-5, WSW-
7, WSW-12, WSW-15, WSW-20, and WSW-22 did not detect targeted compounds above the
laboratory detection limits. Laboratory analysis of the groundwater sample collected from WSW-
14 detected benzene (21.7 µg/L) and total xylenes (31.6 µg/L). The concentration of benzene
exceeds its NC2LGWQS of 1 µg/L and the EPA Drinking Water Standard of 5 µg/L.
4.Water-Supply Well Sampling
Progress completed a Water-Supply Well Sampling Report, dated July 31, 2015. On July 6, 2015
Progress returned to the site to sample the surrounding water-supply wells and gauge
groundwater/free product levels in monitoring well MW-1, as appropriate. Approximately 5.10
feet of free product was detected in monitoring well MW-1. Progress collected groundwater
samples from water-supply wells WSW-2, WSW-3, WSW-5, WSW-6, WSW-7, WSW-9, WSW-
10, WSW-12, WSW-13, WSW-14, WSW-15, WSW-16, WSW-17, WSW-20, WSW-22, WSW-23,
and WSW-24 (Figure 4). Water-supply wells WSW-4, WSW-8, and WSW-21 are no longer in
use. Laboratory analysis of the groundwater samples collected from water-supply wells WSW-2,
WSW-3, WSW-5, WSW-6, WSW-7, WSW-9, WSW-10, WSW-12, WSW-13, WSW-14, WSW-
15, WSW-16, WSW-17, WSW-20, WSW-22, WSW-23, and WSW-24 did not detect targeted
compounds above the laboratory detection limits. Laboratory analysis of the groundwater sample
collected from WSW-14 detected benzene (143 µg/L), total xylenes (225 µg/L), and naphthalene
(17.0 µg/L). The concentrations of benzene and naphthalene exceed their respective NC2LGWQS
of 1 µg/L and 6 µg/L, respectively. In addition, the concentration of benzene exceeds the EPA
Drinking Water Standard of 5 µg/L.
5.Comprehensive Site Assessment
Progress completed a Comprehensive Site Assessment, dated August 20, 2015. Two additional
Type II permanent monitoring wells were installed during the CSA activities using a truck-
mounted drill rig and hollow-stem augers on July 23, 2015 by SAEDACCO. Monitoring wells
MW-5 and MW-6 were installed at the request of the NCDENR to determine whether the detected
petroleum-related compounds in a groundwater sample collected from water-supply well WSW-14
were the result of a release from the gasoline UST system. One Type III permanent monitoring
well (DW-1) was installed using the air-rotary drilling method on July 22 and 23, 2015 in an effort
to vertically delineate the extent of impacted groundwater.
Progress returned to the site on August 3, 2015 to collect groundwater samples from monitoring
wells MW-1 through MW-6 and DW-1. Monitoring well MW-1 was not sampled due to the
presence of approximately 5.51 feet of free product. The groundwater samples were decanted into
laboratory-supplied bottles and placed into a cooler packed with ice. The cooler was delivered
under chain-of-custody to Research and Analytical Laboratories, Inc. (R&A) in Kernersville,
North Carolina for testing. R&A analyzed the groundwater samples for volatile organic
compounds (VOCs) by EPA Method 602 and for semi-volatile organic compounds (SVOCs) using
EPA Method 625BNA plus ten tentatively identified compounds (TICs). Groundwater samples
collected from monitoring wells MW-5, MW-6, and DW-1 were also analyzed for volatile and
extractable petroleum hydrocarbons (VPH and EPH) by the Massachusetts Department of
Environmental Protection (MADEP) Methods.
Approximately 0.69 feet of free product was measured in monitoring well MW-1 during the LSA
sampling event on November 11, 2014. On March 9, 2015, Progress gauged free product in
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monitoring well MW-1 prior to the MMPE event. Approximately 2.92 feet of free product was
measured in monitoring well MW-1. On April 13, 2015 Progress returned to the site to sample the
surrounding water-supply wells and gauge groundwater/free product levels in monitoring well
MW-1, as appropriate. Approximately 1.71 feet of free product was measured in monitoring well
MW-1. Approximately 5.10 feet of free product was measured in monitoring well MW-1 during a
water-supply well sampling event on July 6, 2015. Approximately 5.55 feet of free product was
measured in monitoring well MW-1 during the CSA sampling event on August 3, 2015.
Based on the findings of the CSA, Progress made the following conclusions and recommendations:
Groundwater flow beneath the site appears to be flowing south-southwest;
Soil impacted above the Soil-to-Groundwater MSCCs appears to be located in the “smear
zone” or in close proximity and/or beneath on-site building and is not accessible based on
current site conditions;
Groundwater contamination in excess of the NC2LGWQS persists in on-site monitoring
wells MW-2, MW-5, and MW-6. Benzene was detected in the groundwater sample
collected from monitoring well MW-5 exceeds its GCL;
Free product has been measured in monitoring well MW-1. A free product thickness of
5.55 feet was measured in August 2015, at the time of groundwater sampling for the
preparation of the CSA. The free product thickness appears to be increasing since the
installation of monitoring well MW-1;
Based on the calculated groundwater flow direction and the concentrations detected in
groundwater samples collected from monitoring wells MW-2 and MW-5 it appears that an
off-site, undocumented release of petroleum may have occurred to the north-northeast of
the site;
The release related to the kerosene UST appears to have been adequately defined;
Because public water is not available in the vicinity of the site, free product recovery and
groundwater remediation will be required in an effort to decrease the concentrations of
petroleum-related compounds in the groundwater to below their respective NC2LGWQS;
Prior to a real estate transaction occurring, a Notice of Residual Petroleum (NORP) must
be filed with the Caswell County Register of Deeds. Written permission would be required
from the current property owner prior to Progress filing a NORP on the subject site.
Progress recommends that the current property owner be notified of the findings of this
assessment and that a copy of this report be submitted to the NCDENR;
Prepare and submit a Corrective Action Plan to address the continued free product and
dissolved phase petroleum groundwater contamination; and,
Provide a copy of this report to the property owner.
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6.Site Check Report
Based on the evidence of a gasoline release, the NCDENR requested that a Site Check Report be
completed for the site. On December 9, 2015, Progress advanced sixteen soil borings (GP-1
through GP-16, Figure 13) to determine whether the soil has been adversely affected by the current
gasoline UST system located at the site. Soil borings GP-1 and GP-3 were advanced below the
sumps located beneath each of the dispensers. Soil borings GP-2 and GP-4 through GP-7 were
advanced along the fuel distribution lines. Soil borings GP-8 through GP-16 were advanced in the
vicinity of the gasoline USTs. Each soil sample was collected by driving a five-foot long, 2.25-
inch sampling probe into the soil. In order to access the soil beneath the dispensers, the soil
borings at those locations were drilled at an approximate 45 degree angle.
One soil sample from each soil boring was submitted to a North Carolina certified laboratory for
analysis. The soil sample selected for laboratory analysis from each boring was selected based on
the boring termination depth. Based on historical groundwater data and the estimated depth to
groundwater observed during the groundwater sampling and drilling activities, each soil sample
selected for laboratory analysis was collected from depths ranging from approximately five to
fifteen feet bls. The selected soil sample from each boring was placed into laboratory prepared
containers and then into a cooler packed with ice and delivered under chain-of-custody to Research
and Analytical Laboratories, Inc. (R&A) in Kernersville, North Carolina. Each soil sample was
analyzed for gasoline range total petroleum hydrocarbons (TPH) using EPA Method 8015/5035.
Based on the results of the laboratory testing, the Site Check Report identified evidence of gasoline
range TPH in the immediate vicinity of the gasoline dispensers. The source of the soil contamination
is not known. Based on the results of the annual line tightness testing, the reported nightly electronic
inventory reporting system for the USTs, and the electronic line leak detector system, an active leak
does not appear to be occurring. Double walled lines were installed at the site in 2001 as a
preventative measure as the site water-supply well is located slightly more than 100 feet from the
UST system. Furthermore, sumps are located beneath each dispenser, and evidence of gasoline
releases to the sumps was not noted at the time of the completion of the Site Check activities.
Ethanol, a relatively recent additive to gasoline, has not been detected in the groundwater samples
collected from the on-site monitoring wells.
7.Pre-CAP Monitoring Report
Progress completed a Pre-CAP Monitoring Report, dated October 5, 2016. On September 8, 2016
Progress returned to the site to sample the existing monitoring and recovery wells and to gauge
water/free product levels, as appropriate. Approximately 0.44 feet of free product was detected in
monitoring well MW-1. Groundwater samples were collected from monitoring wells MW-2
through MW-8, DW-1 and DW-2. Groundwater samples were also collected from water-supply
wells 1, 5, 6, 7, 12, 14, 15, 16, 20, and 22.
The laboratory analyzed the groundwater samples collected from monitoring wells MW-2 through
MW-6 and DW-1 for VOCs by Standard Method 6200B plus isopropyl ether (IPE), ethylene
dibromide EDB, and MTBE and for EDB. The groundwater samples collected from monitoring
wells MW-7, MW-8, and DW-2 were analyzed using Standard Method 6200B only. Groundwater
sample analytical results are included in Table B-4.
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Laboratory analysis of the groundwater samples collected from monitoring wells MW-3, MW-6,
MW-7, MW-8, DW-1, and DW-2 and water-supply wells 1, 5, 6, 7, 12, 15, 16, 20, and 22 did not
detect targeted compounds above the their respective NC2LGWQS.
Laboratory analysis of the groundwater samples collected from monitoring wells MW-2, MW-4,
MW-5 and (WSW-14, well identification number later changed to WSW-15) detected various
targeted compounds above the their respective NC2LGWQS; however, the concentrations do not
exceed the applicable North Carolina risk-based Gross Contamination Levels (GCLs) except for
the concentration of benzene detected in monitoring well MW-5.
8.Groundwater Monitoring Report
Progress completed a Groundwater Monitoring Report, dated July 26, 2017. One Type II
permanent monitoring well was installed in the approximate location requested by the NCDEQ
using a truck-mounted drill rig and hollow-stem augers on June 2, 2017 by 3D Environmental
Investigations, LLC. The monitoring well was installed at the request of the NCDEQ to determine
the horizontal extent of the impacted groundwater beneath the site.
Progress was on site on June 20, 2017 to collect groundwater samples from monitoring wells MW-
2 through MW-9 and DW-1 and DW-2. Water samples were also collected from water-supply
wells WSW-1, WSW-5, WSW-6, WSW-14 (later changed to WSW-15), and WSW-20. A
groundwater sample was not collected from monitoring well MW-1, as approximately 2.00 feet of
free product was measured in the well at the time of gauging. The laboratory analyzed the
groundwater samples for VOCs by Standard Method 6200B.
Laboratory analysis of the groundwater samples collected from monitoring wells MW-3,
MW-6, MW-8, MW-9, DW-1, and DW-2 did not detect targeted compounds at
concentrations exceeding their respective NC2LGWQS. Laboratory analysis of the water
samples collected from water-supply wells WSW-1, WSW5, WSW-6, and WSW-20 did
not detect targeted compounds at concentrations exceeding their respective NC2LGWQS
or the applicable US EPA Drinking Water Standards.
Laboratory analysis of the groundwater sample collected from monitoring well MW-2
detected benzene (38.3 ug/L), 1,2-dichloroethane (1.12 ug/L), naphthalene (105 ug/L),
1,2,4-trimethylbenzene (421 ug/L), and total xylenes (807 ug/L) at concentrations
exceeding their respective NC2LGWQS.
Laboratory analysis of the groundwater sample collected from monitoring well MW-4
detected naphthalene (22.8 ug/L) at a concentration exceeding its NC2LGWQS.
Laboratory analysis of the groundwater sample collected from monitoring well MW-5
detected benzene (3,550 ug/L), ethylbenzene (3,260 ug/L) isopropylbenzene (118 ug/L),
IPE (686 ug/L), MTBE (4,690 ug/L), naphthalene (530 ug/L), n-propylbenzene (418 ug/L),
toluene (34,700 ug/L), 1,2,4-trimethylbenzene (2,260 ug/L), 1,3,5-trimethylbenzene (960
ug/L), and total xylenes (18,000 ug/L) at concentrations exceeding their respective
NC2LGWQS.
Laboratory analysis of the groundwater sample collected from monitoring well MW-7
detected MTBE (63.6 ug/L) at a concentration that exceeds its NC2LGWQS.
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Laboratory analysis of the groundwater sample collected from water-supply well WSW-14
(later changed to WSW-15) detected benzene (3.05 ug/L) and 1,2-dichloroethane (1.46
ug/L) at concentrations that exceed their respective NC2LGWQS. Please note, the
concentrations detected in the water sample collected from water-supply well WSW-14 do
not exceed the applicable US EPA Drinking Water Standards.
9.Free Product Gauging
Approximately 0.69 feet of free product was measured in monitoring well MW-1 during the LSA
sampling event on November 11, 2014.
On March 9, 2015, Progress gauged free product in monitoring well MW-1 prior to the MMPE
event. Approximately 2.92 feet of free product were measured in monitoring well MW-1.
On April 13, 2015 Progress returned to the site to sample the surrounding water-supply wells and
gauge groundwater/free product levels in monitoring well MW-1, as appropriate. Approximately
1.71 feet of free product were measured in monitoring well MW-1.
Approximately 5.10 feet of free product were measured in monitoring well MW-1 during a water-
supply well sampling event on July 6, 2015.
Approximately 5.55 feet of free product were measured in monitoring well MW-1 during the CSA
sampling event on August 3, 2015, and 0.80 feet on March 15, 2016.
On September 8, 2016 Progress returned to the site to sample the existing monitoring wells and
gauge water/free product levels in the monitoring wells, as appropriate. Approximately 0.44 feet
of free product was identified in monitoring well MW-1.
On June 20, 2017 Progress returned to the site to sample the existing monitoring wells and gauge
water/free product levels in the monitoring wells, as appropriate. Approximately 2.00 feet of free
product were identified in monitoring well MW-1.
On May 10, 2019 Progress returned to the site to sample the existing monitoring wells and gauge
water/free product levels in the monitoring wells, as appropriate. Approximately 0.10 feet of free
product was identified in monitoring well MW-1.
E PRESENTATION OF CURRENT SITE ASSESSMENT
INFORMATION/COMPARISON TO HISTORICAL ASSESSMENT
INFORMATION
Regional Geology and Hydrogeology
According to the Geologic Map of North Carolina, the subject site is located in the Carolina Stale
Belt of North Carolina. The rocks beneath the site have been characterized as metamorphosed
granitic rocks. Groundwater generally is stored in the pore space between individual grains of
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residual soil and in the fractures within the underlying parent rock. Due to the intense shearing
associated with the thrust faulting in the area and the relatively shallow depths to bedrock, it can be
expected that the fractures play a major role in the flow of groundwater in the subsurface.
Recharge to the water table is primarily by precipitation infiltrating the upper soils and percolating
downward, under the influence of gravity, to the groundwater table. Typically, the water table is not
a level surface, but a subdued reflection of the land surface. However, the depth to the water table is
not constant, and depends on many factors, which include the amount of rainfall, the permeability of
the soil, and the amount of groundwater being pumped in the area.
Site Geology and Hydrogeology
Based on our review of the topographic map and on-site observation, the site is located on an east-
west trending ridge. Groundwater generally flows in directions sub-parallel to the ground surface
slopes and under the influence of gravity toward points of discharge such as creeks, swamps,
drainage swales, or pumped groundwater wells. Based on topographic inference, groundwater
beneath the site most likely flows to the southeast toward an intermittent tributary of Stony Creek
(Figure 1). Based on the excavation and drilling activities at the site, the soil beneath the site consists
predominately of a silty to sandy clay material.
As presented in the Comprehensive Site Assessment, the hydraulic conductivity was calculated as
0.70 ft/day and the groundwater flow velocity was calculated as 0.056 ft/day. Progress also
calculated the vertical gradient to be upward in the range of 0.01123 to 0.02649 in the paired wells
MW-1 and DW-1 and upward in the range of 0.006581 to 0.01304 in the paired wells MW-5 and
DW-2. To calculate the vertical gradient Progress utilized the EPA Online Tools for Site
Assessment Calculation at https://www3.epa.gov/ceampubl/learn2model/part-
two/onsite/vgradient.html.
Determination of Groundwater Flow Direction
The depth to the groundwater surface in each of the monitoring wells was measured prior to the
monitoring well purging using a decontaminated electric sounder. The tops of casing of the wells
were surveyed relative to one another. The elevations of the monitoring wells and the groundwater
surface are both relative to a benchmark. The relative groundwater elevations are shown in Table
B-7.
The relative groundwater elevations are depicted on Figure 3. Based on information collected
during the most recent sampling event, the groundwater flow direction appears to be generally to
the southwest beneath the site.
Receptor Information
Twenty water-supply wells were identified within approximately 1,000 feet of the subject site. It
is Progress’ understanding that municipal water is not available in the vicinity of the site;
therefore, each nearby residence or business utilizes a water-supply well. Based on information
provided to Progress, some of the residences share water-supply wells. Because municipal water
is not available in the vicinity of the site, Progress did not mail water-supply well information
requests to the residences. The site vicinity includes a mix of commercial and residential
development. The commercial structures consist of slab on grade construction. The residential
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properties consists of a mix of trailers and stick built residential structures. The property
immediately to the north of the subject site appears to be only residence constructed with a
basement within 500 feet of the subject site. Table B-5 and Figure 4 summarize the water-supply
well information.
Groundwater Sampling Activities
Progress was on site on May 10, 2019 to collect groundwater samples from monitoring wells MW-
1 through MW-9, DW-1, and DW-2. Water samples were also collected from water-supply wells
WSW-1, WSW-5, WSW-7, WSW-12, WSW-15, WSW-20, and WSW-22. A groundwater sample
was not collected from monitoring well MW-1, as approximately 0.10 feet of free product was
measured in the well at the time of gauging. Prior to sampling, the wells were developed until the
development water ran relatively clear, and the well was purged of an additional three casing
volumes of water prior to sampling. The depth to the groundwater surface in each of the wells was
measured prior to well purging using a decontaminated electric sounder. The wells were surveyed
by Progress using a relative benchmark that was arbitrarily given an elevation of 100 feet (top of
casing of monitoring well MW-3). The elevations of the monitoring wells and the groundwater
surface are both relative to that benchmark. The relative groundwater elevations are shown in
Table B-7. The relative groundwater elevations are depicted on Figure 3.
The groundwater samples were decanted into laboratory-supplied bottles and placed into a cooler
packed with ice. The cooler was delivered under chain-of-custody to Research and Analytical
Laboratories, Inc. (R&A) in Kernersville, North Carolina for testing. R&A analyzed the
groundwater samples for VOCs by Standard Method 6200B. A summary of the groundwater
sample analytical results is included in Table B-4.
Laboratory analysis of the groundwater samples collected from monitoring wells MW-3,
MW-6, MW-8, MW-9, DW-1, and DW-2 did not detect targeted compounds at
concentrations exceeding their respective NC2LGWQS. Laboratory analysis of the water
samples collected from water-supply wells WSW-1, WSW-5, WSW-7, WSW-12, WSW-
20, and WSW-22 did not detect targeted compounds at concentrations exceeding their
respective NC2LGWQS or the applicable US EPA Drinking Water Standards.
Laboratory analysis of the groundwater sample collected from monitoring well MW-2
detected benzene (49.2 ug/L), naphthalene (174 ug/L), 1,2,4-trimethylbenzene (558 ug/L),
and total xylenes (1,160 ug/L) at concentrations exceeding their respective NC2LGWQS.
Laboratory analysis of the groundwater sample collected from monitoring well MW-4
detected naphthalene (48.4 ug/L) at a concentration exceeding its NC2LGWQS.
Laboratory analysis of the groundwater sample collected from monitoring well MW-5
detected benzene (2,810 ug/L), ethylbenzene (2,330 ug/L) isopropylbenzene (145 ug/L),
IPE (264 ug/L), MTBE (1,280 ug/L), naphthalene (5,730 ug/L), n-propylbenzene (309
ug/L), toluene (19,000 ug/L), 1,2,4-trimethylbenzene (2,410 ug/L), 1,3,5-trimethylbenzene
(570 ug/L), and total xylenes (16,600 ug/L) at concentrations exceeding their respective
NC2LGWQS.
Laboratory analysis of the groundwater sample collected from monitoring well MW-7
detected MTBE (63.4 ug/L) at a concentration that exceeds its NC2LGWQS.
Groundwater Monitoring Report July 31, 2019
Pagetown Exxon Progress Project 1019076.001
Reidsville, Caswell County, North Carolina
21
Laboratory analysis of the groundwater sample collected from water-supply well WSW-15
detected benzene (4.43 ug/L) at a concentration that exceeds its NC2LGWQS. Please
note, the concentrations detected in the water sample collected from water-supply well
WSW-15 do not exceed the applicable US EPA Drinking Water Standards.
The laboratory analytical reports for the groundwater samples are provided in the Appendix.
The laboratory test results are summarized on Figure 5. Maps depicting the plumes of benzene,
BTEX, and MTBE concentrations are included on Figures 6 through 8, respectively.
F FREE PRODUCT REMOVAL
Free product removal was not conducted during the on-site activities.
G MONITORED NATURAL ATTENUATION/NATURAL SOURCE ZONE
DEPLETION STATUS
Progress collected groundwater samples from monitoring wells MW-2 through MW-9, DW-1, and
DW-2 on May 10, 2019.
Laboratory Analytical Results
R&A analyzed the groundwater samples for VOCs by Standard Method 6200B including ethanol,
MTBE, and IPE. A summary of the groundwater analytical results is presented in Table B-4 and
on Figure 3. Laboratory analysis of the groundwater samples collected from monitoring wells
MW-2, MW-4, MW-5, and MW-7 detected multiple petroleum-related compounds at
concentrations that exceed their respective NC2LGWQS. Groundwater concentrations detected in
the groundwater samples collected from the on-site monitoring wells appear to be generally similar
to the previous sampling event. The size and orientation of the groundwater plume appears to be
relatively unchanged since the most recent sampling events.
H CONCLUSIONS
Based on the results of the groundwater sampling event, Progress makes the following conclusions
and recommendations:
Progress was on site on May 10, 2019 to collect groundwater samples from monitoring
wells MW-1 through MW-9, DW-1, and DW-2. Water samples were also collected from
water-supply wells WSW-1, WSW-5, WSW-7, WSW-12, WSW-15, WSW-20, and WSW-
22.
A groundwater sample was not collected from monitoring well MW-1, as approximately
0.10 feet of free product was measured in the well at the time of gauging.
Laboratory analysis of the groundwater samples collected from monitoring wells MW-3,
MW-6, MW-8, MW-9, DW-1, and DW-2 did not detect targeted compounds above their
respective NC2LGWQS. Laboratory analysis of the groundwater samples collected from
Groundwater Monitoring Report July 31, 2019
Pagetown Exxon Progress Project 1019076.001
Reidsville, Caswell County, North Carolina
22
monitoring wells MW-2, MW-4, MW-5, and MW-7 detected targeted compounds above
their respective NC2LGWQS.
Laboratory analysis of water samples collected from water-supply wells WSW-1, WSW-5,
WSW-7, WSW-12, WSW-20, and WSW-22 did not detect targeted compounds above their
respective NC2LGWQS or US EPA Drinking Water Standards;
Laboratory analysis of the groundwater sample collected from water-supply well WSW-15
detected benzene at a concentration that exceeds its NC2LGWQS. Please note, the
concentration detected in the water sample collected from water-supply well WSW-15
does not exceed the applicable US EPA Drinking Water Standards;
Kerosene impacted soil above the Soil-to-Groundwater MSCCs appears to be located in
close proximity and/or beneath on-site building and is not accessible based on current site
conditions in the vicinity of the former kerosene UST;
Gasoline contamination in the soil in excess of the TPH Action Level or Soil-to-
Groundwater MSCCs persists in the vicinity of the fuel dispensing lines. Based on the
tank and line tightness testing, the current UST system does not appear to be leaking.
Additionally, the fuel distribution lines have been upgraded to include double walled
fiberglass lines and plastic sumps beneath the fuel dispensers. Based on calculations, the
impacted area of contaminated soil encompasses approximately 800 square feet
immediately beneath the canopy. Assuming an approximate depth to the water table of 16
feet and an unaffected overburden of two feet there is approximately 11,200 cubic feet or
414 cubic yards of impacted soil in the vicinity of the dispensers. Using a multiplier of 1.5
(cubic yards to tons), Progress estimates that there is approximately 621 tons of
contaminated soil at the site. It appears that the contaminant plume is adequately defined
and migrating in a southwesterly direction;
The extent of groundwater contamination exceeding the NC2LGWQS is estimated to be
approximately 14,000 square feet. Assuming a 15 foot thick shallow aquifer and a 30%
effective porosity, Progress estimates that there is approximately 471,000 gallons of
groundwater beneath the site that is impacted at concentrations exceeding the
NC2LGWQS;
Measured free product thicknesses in monitoring well MW-1, located proximal to the
kerosene release, have decreased significantly;
Contaminant concentrations in monitoring well MW-2, located crossgradient of the
historic gasoline release at the site appear to be increasing slightly;
Contaminant concentrations in monitoring well MW-5, located proximal to an historic
gasoline release at the site, are generally decreasing;
Groundwater impacts to the nearby water-supply well (WSW-15) do not appear to be
related to the release at the site, and is likely related to one or more identified potential
petroleum sources in the vicinity of the site. Please note, the most recent resident of the
property served drinking water by water supply well WSW-15 has passed away and the
Groundwater Monitoring Report July 31, 2019
Pagetown Exxon Progress Project 1019076.001
Reidsville, Caswell County, North Carolina
23
residence has remained unoccupied. The residence was being provided bottled water prior
to her death;
Because the soil contamination is located beneath the active gasoline dispensing system
which does not appear to be leaking, it is Progress’ opinion that a remedial strategy should
consist of in-situ treatment for both soil and groundwater contamination;
In light of recent technological advancements in the bio-remediation industry, Progress
would recommend the implementation of a bio-remediation plan that would include
temporary injection points installed proximal to the dispensing island to address soil
contamination and permanent inject points in a determined grid to address groundwater
contamination; and,
Because of the groundwater contamination in the area and absence of public water
supplies in the area, Progress would recommend that the water-supply wells within 250 to
500 feet be equipped with point of entry systems that address both petroleum and
biological contamination. It may be possible to consolidate the number of water-supply
wells in the southwesterly direction from the source area to minimize the number of POE
systems to be installed. Progress would recommend that the soil contamination would be
addressed with a series of soil borings injected to various depths (5,10, and 15 feet bls)
and a bioremediation product injected into the boreholes through the drilling rods.
Progress estimates that there would be six injection locations, each with at least three
depths of injection. To address groundwater contamination, Progress estimates that up to
21 injection points will be installed as part of the bio-remediation activities. A Proposed
Injection Plan Map is included as Figure 15. The amount of bioremediation product will
be calculated for each injection point based on the inferred contaminant concentration at
that point.
I STATEMENTS AND CERTIFICATION
1 Enter the date the monitoring report was due. July 31, 2019. Will this report be
submitted after the established due date?
YES NO
2 Was any required information from the above template missing from this report?YES NO
3 If applicable, will any of the proposed attenuation milestones under the schedule
approved in the Corrective Action Plan not be met? (within a reasonable margin of error)
YES NO
Milestones not established.
4 Does any known or suspected source zone soil contamination or free product remain outside of the assessed area that could be inhibiting natural attenuation? YES NO
FIGURES
Figure 1
Topographic Site Map
Pagetown Exxon
8035 Cherry Grove Road
Reidsville, Caswell County, North Carolina
P.O. Box 5884
Winston-Salem, NC 27113
Telephone: [phone]
Fax: [phone]
www.progressenvironmental.com
United States Department of the Interior USGS 7.5 Minute Series Topographic Map
Contour Interval: 10 feet
Scale: 1”=2000’
Cherry Grove, North Carolina
Date: 1997
Project: Pagetown Exxon
Client: Eden Oil Company
Progress Job #: 1019076.001
Date: July 2019
SITE
Site
REV
0
DRAWING TITLE
DRAWING NUMBER
FIGURE 2
LEGEND
Approximate MonitoringWell Location
Product Dispenser
Site MapPagetown Exxon
8035 Cherry Grove RoadReidsville, North Carolina
DR.: JAB JULY19
CK.: JSL
APP'D.:
SCALE: SHOWN
PROGRESS NO.: 1019076.001
Approximate SubsurfaceUtility Location
Approximate UST LocationDIESEL
Approximate Water-Supply Well Location
Approximate AST Location
Approximate Excavation Limits
Approximate Property Line
www.progressenvironmental.com
P.O. Box 5884Winston-Salem, North Carolina 27113(336) 722-9999
Progress
Environmental Group, Inc.
N
EW
MW-1
MW-4
MW-3
MW-2
MW-4
MW-5
MW-6
DW-1
GASGASGASK-1/Dies
DIESELK-1
K-1/Dies
DW-2
MW-7
MW-8
MW-9
1 2
3
6/7
REV
0
DRAWING TITLE
DRAWING NUMBER
FIGURE 3
LEGEND
Potentiometric Surface MapPagetown Exxon
8035 Cherry Grove RoadReidsville, North Carolina
DR.: JAB JULY 19
CK.: JSL
APP'D.:
SCALE: SHOWN
PROGRESS NO.: 1019076.001
Approximate SubsurfaceUtility Location
Dispenser Canopy
Please note: MW-1 was not used in the calculation due to the presence of free product. The Type IIIwells were also not used in the calculation.
Groundwater Contour and Elevation
Calculated Groundwater Flow Direction
Contour Interval = 1.00 feet
Inferred Groundwater Contour Elevation
Approximate Property Line
Approximate Monitoring Well Locationand Groundwater Elevation
www.progressenvironmental.com
P.O. Box 5884Winston-Salem, North Carolina 27113(336) 722-9999
Progress
Environmental Group, Inc.
N
EW
MW-1
MW-4
MW-3
MW-2
MW-5
MW-6
83.00
(81.79)
(83.31)
(82.93)
(83.50)
(82.42)
MW-4
(77.73)86.00MW-7
MW-8
(87.05)
(86.03)84.0083.00MW-9(83.64)85.0082.0082.00
83.00
84.00
85.00
86.00
ProgressENVIRONMENTAL GROUP, INC.JSL1019076.001JULY 2019JABAS SHOWNJULY 2019Figure 4.SKFP.O. Box 5884WINSTON-SALEM, NORTH CAROLINA 27113PHONE [phone] FAX [phone]FIGURE 4WATER-SUPPLY WELL LOCATION MAP8035 CHERRRY GROVE ROADREIDSVILLE, NORTH CAROLINAPROJECTAPPROXIMATE OBSERVED WATER-SUPPLY WELL LOCATION
PLEASE NOTE: BASED ON MUNICIPAL WATER NOT BEING PRESENT IN THE VICNITY OF THE SITE,
EACH RESIDENCE OR BUSINESS IS CONSIDERED TO UTILIZE A WATER-SUPPLY WELL FOR ITS SOURCE OF DRINKING WATER.
THE OWNER INFORMATION IS PROVIDED IN TABLE B-5 AS OBTAINED FROM THE CASWELL COUNTY GIS.
1
2
3
22
5
6
7
9
10
11
1 2 13
14 15
16
17
20
23
24
18
19
APPROXIMATE PROPERTY BOUNDARY
1,000-FOOT RADIUS
500-FOOT RADIUS
250-FOOT RADIUS
REV
0
DRAWING TITLE
DRAWING NUMBER
FIGURE 5
LEGEND
Groundwater Analytical Results Map
Pagetown Exxon8035 Cherry Grove RoadReidsville, North Carolina
DR.: JAB JULY 19
CK.: JSL
APP'D.:
SCALE: SHOWN
PROGRESS NO.: 1019076.001
Approximate SubsurfaceUtility Location
Dispenser Canopy
Product Dispenser
Approximate R-O-W
Approximate Monitoring Well Location
www.progressenvironmental.com
P.O. Box 5884Winston-Salem, North Carolina 27113(336) 722-9999
Progress
Environmental Group, Inc.
N
EW
MW-1
MW-4
MW-3
MW-2
MW-5
MW-6
MW-2
Benzene 49.2 ppb
Ethylbenzene 121 ppbI-Propylbenzene 29.4 ppbNapthalene 174 ppbn-Propylbenzene 46.0 ppb
p-Isopropyltoluene 15.8 ppbSec-Butylbenzene 13.6 ppb
Toluene 62.0 ppb1,2,4-Trimethylbenzene 558 ppb1,3,5-Trimetylbenzene 136 ppbTotal Xylenes 1,160 ppb
Benzene 2,810 ppbEthylbenzene 2,330 ppbIPE 264 ppbI-Propylbenzene 145 ppbMTBE 1,280Naphthalene 5,730 ppbn-Propylbenzene 309 ppbToluene 19,000 ppb1,2,4-Trimethylbenzene 2,410 ppb1,3,5-Trimethylbenzene 570 ppbTotal Xylenes 16,600 ppb
Ethylbenzene 21.4 ppbIsopropylbenzene 9.77Naphthalene 48.4 ppbn-Propylbenzene 15.5 ppbp-Isopropyltoluene 9.25 ppbsec-Butylbenzene 6.82 ppbToluene 0.58 ppb1,2,4-Trimethylbenzene 66.9 ppb1,3,5-Trimethylbenzene 52.0 ppbTotal Xylenes 101 ppb
Chloroform 3.83 ppb
Below Quantitation Limits
Free Product
DW-1
Below Quantitation Limits
MW-7
MW-8
DW-2
Chloroform 2.80 ppbIPE 1.75 ppbMTBE 63.4 ppb
Below Quantitation Limits
Benzene 0.54 ppbEthylbenzene 3.12 ppbIPE 1.47 MTBE 1.901,2,4-Trimethylbenzene 0.83 ppbTotal Xylenes 3.89 ppb
MW-9 Below Quantitation Limits
REV
0
DRAWING TITLE
DRAWING NUMBER
FIGURE 6
LEGEND
Benzene Isopleth MapPagetown Exxon
8035 Cherry Grove RoadReidsville, North Carolina
DR.: JAB JULY 19
CK.: JSL
APP'D.:
SCALE: SHOWN
PROGRESS NO.: 1019076.001
Approximate SubsurfaceUtility Location
Dispenser Canopy
Product Dispenser
Benzene Isopleth and Concentration (ppb)
Inferred Isopleth
Approximate R-O-W
Approximate Monitoring Well Locationand Benzene Concentration
Please note: MW-1 was not used in the isopleth due to the presence of free product. The
Type III monitoring wells were also not utilized in the isopleth.
Approximate Extent of Free Product www.progressenvironmental.com
P.O. Box 5884Winston-Salem, North Carolina 27113(336) 722-9999
Progress
Environmental Group, Inc.
N
EW
MW-1
MW-4
MW-3
MW-2
MW-5
MW-6
1,000
(BQL)
(BQL)
(2,810)
(49.2)
(BQL)
MW-2(38.3)
1,000
(FP)
100
BQL
DW-1(BQL)DW-2(0.54)
MW-7
(BQL)
MW-8
(BQL)
MW-9
(BQL)
REV
0
DRAWING TITLE
DRAWING NUMBER
FIGURE 7
BTEX Isopleth MapPagetown Exxon
8035 Cherry Grove RoadReidsville, North Carolina
DR.: JAB JULY 19
CK.: JSL
APP'D.:
SCALE: SHOWN
PROGRESS NO.: 1019076.001
Please note: MW-1 was not used in the isopleth due to the presence of free product. The Type III monitoring wells were also not utilized in the isopleth.
LEGEND
Approximate Extent of Free Product
Approximate SubsurfaceUtility Location
Dispenser Canopy
Product Dispenser
BTEX Isopleth and Concentration (ppb)
Inferred Isopleth
Approximate Property Line
Approximate Monitoring Well Locationand BTEX Concentration
www.progressenvironmental.com
P.O. Box 5884Winston-Salem, North Carolina 27113(336) 722-9999
Progress
Environmental Group, Inc.
N
EW
MW-4
MW-3
MW-2
MW-5
MW-6
(122.98)
(BQL)
(37,930)
(1,392.2)
(BQL)
20,000
10,000
BQL
DW-1(BQL)DW-2(7.55)
MW-9
(BQL)
MW-7
MW-8
(BQL)
(BQL)
5,000
1,000
MW-5(59,510)
MW-1(FP)
REV
0
DRAWING TITLE
DRAWING NUMBER
FIGURE 8
MTBE Isopleth MapPagetown Exxon8035 Cherry Grove Road
Reidsville, North Carolina
DR.: JAB JULY 19
CK.: JSL
APP'D.:
SCALE: SHOWN
PROGRESS NO.: 1019076.001
Approximate SubsurfaceUtility Location
Dispenser Canopy
Product Dispenser
MTBE Isopleth and Concentration (ppb)
Inferred Isopleth
Approximate Property Line
Approximate Monitoring Well Locationand MTBE Concentration
Please note: MW-1 was not used in the isopleth due to the presence of free product. The Type III monitoring wells were also not utilized in the isopleth.
LEGEND
Approximate Extent of Free Product www.progressenvironmental.com
P.O. Box 5884Winston-Salem, North Carolina 27113(336) 722-9999
rogress
Environmental Group, Inc.
N
EW
MW-4
MW-3
MW-2
MW-5
MW-6
100
(BQL)
(BQL)
(1,280)
(BQL)
(BQL)
MW-7(63.6)
1,000
BQL
DW-1(BQL)
MW-7
MW-8
(63.4)
(BQL)
DW-2(1.90)
100
MW-9
(BQL)
MW-1(FP)
Progress
ENVIRONMENTAL GROUP, INC.JAB
1019076.001
JULY 2019
JAB
NTS
JULY 2019
Figure 9.SKF
P.O. Box 5884WINSTON-SALEM, NORTH CAROLINA 27113PHONE [phone] FAX [phone]
FIGURE 9ADJACENT PROPERTY OWNERSPAGETOWN EXXON8035 CHERRY GROVE ROAD
REIDSVILLE, NORTH CAROLINA %db("MAG-DATE")PROJECT
1
ADJACENT PROPERTY INFORMATION*SEE TABLE B-6
SITE
2
LEGEND
2 3
CHERRY GROVE ROAD
PAGETOWN ROADSITE
REV
0
DRAWING TITLE
DRAWING NUMBER
FIGURE 10
LEGEND
Approximate MonitoringWell Location
Product Dispenser
Cross Section Location MapPagetown Exxon
8035 Cherry Grove RoadReidsville, North Carolina
DR.: JAB JULY 19
CK.:
APP'D.:
SCALE: SHOWN
PROGRESS NO.: 1019076.001
Approximate SubsurfaceUtility Location
Approximate UST LocationDIESEL
Approximate Water-Supply Well Location
Approximate AST Location
Approximate Soil Sample Location
Approximate Property Line
www.progressenvironmental.com
P.O. Box 5884Winston-Salem, North Carolina 27113(336) 722-9999
Progress
Environmental Group, Inc.
N
EW
MW-1
MW-4
MW-3
MW-2
MW-4
MW-5
MW-6
DW-1
GASGASGASK-1/Dies
DIESELK-1
K-1/Dies
C7 C8
C9
MW-7
MW-8
DW-2C1
C2
C3 C4
C5
C6A A'B'
B
Cross Section A-A'
Pagetown Exxon
8035 Cherry Grove Road
Reidsville, North Carolina
HORIZONTAL SCALE: As shown in feet
VERTICAL SCALE: As shown in feet
Progress
ENVIRONMENTAL GROUP, INC.JSL JULY 19
JAB
SHOWN
JULY 19
Figure 11.SKF
-40
-20
0
-60
P.O. Box 5884
WINSTON-SALEM, NORTH CAROLINA 27113
PHONE [phone] FAX [phone]
A'A
Estimated area of soil impacted above the Soil-to-Groundwater MSCCs
0 25 50 75 100MW-1Former Tank Pit C1Sandy Clay
1019076.001
PROJECT
Silty Clay DW-1MW-5DW-2C7C8C9C4MW-7125 150 175
EXTENT OF NC2LGWQS CONTAMINATION
FREE PRODUCT
EXCAVATION
Extent of groundwater contamination exceeding the NC2LGWQS
EXTENT OF SOIL CONTAMINATIONIN EXCESS OF SOIL TO GROUNDWATER MSCC
EXTENT OF SOIL CONTAMINATIONIN EXCESS OF RESIDENTIAL CLEANUP LEVEL
Estimated area of soil impacted above the Residential Cleanup Levels
Free Product
Cross Section B-B'
Pagetown Exxon
8035 Cherry Grove Road
Reidsville, North Carolina
HORIZONTAL SCALE: As shown in feet
VERTICAL SCALE: As shown in feet
Progress
ENVIRONMENTAL GROUP, INC.JSL JULY 19
JAB
SHOWN
JULY 19
Figure 12.SKF
-40
-20
0
-60
P.O. Box 5884WINSTON-SALEM, NORTH CAROLINA 27113PHONE [phone] FAX [phone]
B'B
0 12.5 25 37.5 50C2
1019076.001
PROJECT MW-5DW-2C8C6Estimated area of soil impacted above the Soil-to-Groundwater MSCCs
Former Tank Pit
Sandy Clay
Silty Clay
Extent of groundwater contamination exceeding the NC2LGWQS
Estimated area of soil impacted above the Residential Cleanup Levels
Free Product
REV
0
DRAWING TITLE
DRAWING NUMBER
FIGURE 13
LEGEND
Approximate MonitoringWell Location
Product Dispenser
Soil Sample Location MapPagetown Exxon
8035 Cherry Grove RoadReidsville, North Carolina
DR.: JAB JULY 19
CK.:
APP'D.:
SCALE: SHOWN
PROGRESS NO.: 1019076.001
Approximate SubsurfaceUtility Location
Approximate UST LocationDIESEL
Approximate Water-Supply Well Location
Approximate AST Location
Approximate Soil Sample Location during Site Check
Approximate Property Line
Approximate Extent of SoilContamination in Smear Zone
Approximate Extent of SoilContamination in Unsaturated Zone
Approximate Soil Sample Location During Initial Abatement Action Activites
Approximate Soil Sample Location during CSA
MW-1
www.progressenvironmental.com
P.O. Box 5884Winston-Salem, North Carolina 27113(336) 722-9999
Progress
Environmental Group, Inc.
N
EW
MW-4
MW-3
MW-2
MW-4
MW-5
MW-6
DW-1
GASGASGASK-1/Dies
DIESELK-1
K-1/Dies
GP2/C8
GP3/C9
GP4
GP5
GP6
GP7
GP16
GP15
GP14 GP13
GP12
GP11
GP10
GP9
GP8
S-1
W-1 N-1
E-1
B-1
GP-1/C7
C1
C2
C3
C4
C5
C6
N-1
C3
GP-1
MW-7
MW-8
MW-9
EXTENT OF
EXCAVATION
ProgressENVIRONMENTAL GROUP, INC.JSL1019076.001JULY 2019JABAS SHOWNJULY 2019Figure 14.SKFP.O. Box 5884WINSTON-SALEM, NORTH CAROLINA 27113PHONE [phone] FAX [phone]FIGURE 14ADDITIONAL POTENTIAL PETROLEUM SOURCES MAP8035 CHERRRY GROVE ROADREIDSVILLE, NORTH CAROLINAPROJECTADDITIONAL POTENTIAL PETROLEUM SOURCES
Former Gasoline Station
(USTs Removed)
APPROXIMATE PROPERTY BOUNDARY
Former Gasoline Station
(USTs Removed)
SITE
REV
0
DRAWING TITLE
DRAWING NUMBER
FIGURE 15
Proposed Injection Plan MapPagetown Exxon
8035 Cherry Grove RoadReidsville, North Carolina
DR.: JAB JULY 19
CK.: JSL
APP'D.:
SCALE: SHOWN
PROGRESS NO.: 1019076.001
Please note: MW-1 was not used in the isopleth due to the presence of free product. The Type III monitoring wells were also not utilized in the isopleth.LEGEND
Approximate Extent of Free Product
Approximate SubsurfaceUtility Location
Dispenser Canopy
Product DispenserExtent of NC2LGWQS Exceedance in Groundwater
Approximate Property Line
Approximate Monitoring Well Location
Proposed Groundwater Injection Point
Proposed Groundwater Injection Point
Proposed Groundwater Injection Point
www.progressenvironmental.com
P.O. Box 5884Winston-Salem, North Carolina 27113(336) 722-9999
Progress
Environmental Group, Inc.
N
EW
MW-4
MW-3
MW-2
MW-5
MW-6 (BQL)
(1,392.2)
DW-1(BQL)DW-2
MW-9
(BQL)
MW-7
MW-8
MW-5
MW-1(FP)
ESTMATED EXTENT OF GROUNDWATER CONTAMINATION
TABLES AND CHARTS
8015/5035 8015/3550
Date Collected
(mm/dd/yy)
Sample Depth
(ft BGS)
*GP-1 3/17/2014 10 BQL BQL NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
*GP-2 3/17/2014 15 BQL BQL NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
*GP-3 3/17/2014 10 BQL BQL NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
*GP-4 3/17/2014 12 1,410 64,700 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
*GP-5 3/17/2014 5 BQL BQL NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
CS-1 06/16/14 8 BQL BQL NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
CS-2 06/16/14 8 BQL BQL NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
CS-3 06/16/14 8 2,940 37,500 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
B-1 06/17/14 21 NA NA BQL BQL 1.93 1.36 1.51 BQL BQL BQL 1.43 2.48 1.73 2.10 13.4 4.06 11.2 BQL 2.81 3.71 2.16 BQL 101 290.8 1,202 BQL
N-1 06/17/14 15 NA NA BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL
E-1 06/17/14 15 NA NA BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL 29.9 BQL
S-1 06/17/14 15 NA NA BQL BQL 1.16 0.977 0.724 BQL BQL BQL 0.858 1.03 1.04 BQL 7.55 2.24 4.63 BQL 0.705 0.811 BQL BQL 57.1 300 4,387 22.5
W-1 06/17/14 15 NA NA BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL
GP1-5 12/09/15 5 1,030 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
GP2-5 12/09/15 5 684 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
GP3-5 12/09/15 5 517 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
GP4-5 12/09/15 5 BQL NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
GP5-5 12/09/15 5 BQL NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
GP6-5 12/09/15 5 BQL NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
GP7-5 12/09/15 5 BQL NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
GP8-15 12/09/15 5 BQL NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
GP9-15 12/09/15 15 BQL NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
GP10-15 12/09/15 15 BQL NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
GP11-15 12/09/15 15 BQL NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
GP12-15 12/09/15 15 BQL NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
GP13-15 12/09/15 15 BQL NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
GP14-15 12/09/15 15 BQL NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
GP15-15 12/09/15 15 BQL NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
C1-5 03/16/16 5 NA NA BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA BQL BQL BQL NA
C1-10 03/16/16 10 NA NA BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA BQL BQL BQL NA
C1-15 03/16/16 15 NA NA BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA BQL BQL BQL NA
C2-5 03/16/16 5 NA NA BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA BQL BQL BQL NA
C2-10 03/16/16 10 NA NA BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL 0.007 BQL 0.018 NA NA NA NA NA BQL BQL BQL NA
C2-15 03/16/16 15 NA NA BQL BQL BQL BQL BQL BQL BQL 0.020 BQL BQL BQL 0.005 0.007 BQL 0.017 NA NA NA NA NA BQL BQL BQL NA
C3-5 03/16/16 5 NA NA BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA BQL BQL BQL NA
C3-10 03/16/16 10 NA NA BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA BQL BQL BQL NA
C3-15 03/16/16 15 NA NA BQL BQL BQL BQL BQL BQL BQL 0.057 BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA BQL BQL BQL NA
C4-5 03/16/16 5 NA NA BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA BQL BQL BQL NA
C3-10 03/16/16 10 NA NA BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA BQL BQL BQL NA
C4-15 03/16/16 15 NA NA BQL BQL BQL BQL BQL BQL BQL 0.016 BQL BQL BQL 0.005 BQL BQL BQL NA NA NA NA NA BQL BQL BQL NA
C5-5 03/16/16 5 NA NA BQL BQL BQL BQL BQL BQL 0.086 0.078 BQL BQL BQL 0.005 BQL BQL BQL NA NA NA NA NA BQL BQL BQL NA
C5-10 03/16/16 10 NA NA BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA BQL BQL BQL NA
C5-15 03/16/16 15 NA NA 0.012 0.007 BQL BQL 0.005 BQL 0.056 1.96 BQL 0.034 BQL 0.048 0.030 0.010 0.051 NA NA NA NA NA 27.1**BQL 20.1**NA
C6-5 03/16/16 5 NA NA BQL BQL BQL BQL BQL BQL BQL 0.011 BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA BQL BQL BQL NA
C6-10 03/16/16 10 NA NA BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA BQL BQL BQL NA
C6-15 03/16/16 15 NA NA BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA BQL BQL BQL NA
C7-5 03/16/16 5 NA NA BQL BQL 4.94 1.37 2.73 1.24 BQL BQL BQL 8.58 5.66 BQL 56.4 14.4 5.57 NA NA NA NA NA 569**330**704**NA
C7-10 03/16/16 10 NA NA BQL BQL 19.2 BQL 64.3 BQL BQL BQL BQL 49.6 36.9 84.3 264 154 416 NA NA NA NA NA 2,480**1,670**4,680**NA
C7-15 03/16/16 15 NA NA BQL BQL 15.7 BQL 45.3 BQL BQL BQL BQL 53.5 31.8 14.4 246 129 223 NA NA NA NA NA 2,970**2,920**6,100**NA
C8-5 03/16/16 5 NA NA BQL BQL 1.50 BQL 1.24 BQL BQL BQL BQL 4.72 BQL 5.04 26.5 15.2 24.4 NA NA NA NA NA 1,850**1,730**4,370**NA
C8-10 03/16/16 10 NA NA BQL BQL 22.2 BQL 99.1 BQL BQL BQL BQL 54.2 52.2 287 300 179 555 NA NA NA NA NA 3,660**3,170**7,020**NA
C8-15 03/16/16 15 NA NA 1.88 BQL 5.36 1.94 20.2 2.72 BQL 1.98 BQL 11.1 12.1 59 64 35.8 109 NA NA NA NA NA 2,810**2,680**6,240**NA
C9-5 03/16/16 5 NA NA BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA BQL BQL BQL NA
C9-10 03/16/16 10 NA NA BQL BQL BQL BQL BQL BQL BQL 0.019 BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA BQL BQL BQL NA
C9-15 03/16/16 15 NA NA BQL BQL BQL BQL BQL BQL 0.034 0.422 BQL 0.016 BQL BQL 0.005 BQL BQL NA NA NA NA NA BQL BQL BQL NA
10 10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
NA NA 0.0056 0.0019 4.3 3.3 4.9 1.7 0.37 0.091 0.12 0.16 1.7 4.3 8.5 8.3 4.6 56 0.004 3.6 0.16 270 68 31 540 #
NA NA 18 7 626 626 1,560 1,564 156 350 100 313 626 1,200 782 782 3,129 469 20 63 313 469 939 469 1,500 31,000
NA NA 164 63 16,350 16,350 40,000 40,880 4,088 3,100 4,000 8,176 16,350 3,200 20,440 20,440 81,760 12,264 100 1,635 8,176 12,264 24,528 12,264 40,000 810,000
NOTES:
Concentration exceeds the Soil-to-Groundwater MSCCs or TPH Action Levels
Concentration exceeds the Residential Soil Cleanup Levels
BQL = Below Quantitation Limits
values shown in mg/Kg
MSCC = maximum soil contaminant concentration
ft. BGS = feet below ground surface
mg/kg =milligrams per kilogram
# = Health based level > 100%
NE = Not Established
NA = Not Analyzed
** = VPH Only
TPH Soil Action Level (mg/Kg)1,2-DichloroethaneTolueneMTBEp-IsopropyltolueneIndustrial/Commercial Soil Cleanup Levels (mg/Kg)
Contaminant of Concern
Sample ID
Soil-to-Groundwater MSCC (mg/Kg)
Residential Soil Cleanup Levels (mg/Kg)Ethylbenzenen-Butylbenzene8270
1-Methylnaphthalene1,3,5-TrimethylbenzenePhenanthareneTotal xylenes1,2,4-TrimethylbenzenePyreneNaphthaleneBenzeneGROC19-C36 AliphaticsC9-C18 Aliphatics or C9-12 AliphaticsC5-C8 AliphaticsC9-C22 Aromatics or C9-10 Aromaticsn-PropylbenzeneIPEDROI-PropylbenzeneGroundater Monitoring Report
8260
Table B-3
Summary of Soil Analytical Results
Pagetown Exxon
2-Methylnaphthalenesec-ButylbenzeneAnalytical Method VPH and/or EPH MADEP Methods
Naphthalene
Table B-4
Summary of Groundwater Analytical Results
Groundwater Monitoring Report
Pagetown Exxon
504.1
Well ID Date Collected
(m/dd/yy)
Depth to Water
(Ft. Below TOC)
11/11/2014 FP (0.69')FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP NM NM NM NM NM NM
4/13/2015 FP (1.71')FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP NM NM NM NM NM NM
7/6/2015 FP (5.10')FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP NM NM NM NM NM NM
8/3/2015 FP (5.55')FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP NM NM NM NM NM NM
3/23/2016 FP (0.80')FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP NM NM NM NM NM NM
9/9/2016 FP (0.44')FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP NM NM NM NM NM NM
6/20/2017 FP (2.00) FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP NM NM NM NM NM NM
5/10/2019 FP (0.10')FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP NM NM NM NM NM NM
11/12/2014 21.61 BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL See Data NA NA BQL BQL 111 BQL 5.31 18.5 78.9 NM NM NM
8/3/2015 21.18 33.3 NA NA NA 90.6 BQL NA BQL NA NA NA NA NA 292 NA NA 1,120 17.8 17.6 39.7 See Data NA NA NA NA NA NA 7.36 18.5 74.3 NM NM NM
3/23/2016 17.65 4.71 BQL 2.72 BQL 13.4 BQL 2.38 BQL 9.61 0.55 2.98 1.15 0.94 2.97 35.8 12.8 74.3 NA NA NA NA NA NA NA NA NA NA 5.91 19.3 72.9 NM NM NM
9/9/2016 20.43 34.5 BQL 3.99 BQL 98.5 BQL 20.3 BQL 115 7.40 28.5 10.2 9.48 32 385 97.8 810 NA NA NA NA BQL NA NA NA NA NA 5.91 19.3 72.9 NM NM NM
6/20/2017 20.05 38.3 BQL 3.84 1.12 64.0 BQL 22.8 BQL 105 14.7 35.1 BQL 12.2 29.6 421 162 807 NA NA NA NA NA NA NA NA NA NA 4.55 18.3 61.0 NM NM 2.24
5/10/2019 16.35 49.2 BQL BQL BQL 121 BQL 29.4 BQL 174 BQL 46.0 15.8 13.6 62.0 558 136 1,160 NA NA NA NA NA NA NA NA NA NA 5.92 18.7 49.7 163.5 NM 4.25
11/12/2014 22.54 BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL See Data NA NA BQL BQL BQL BQL 5.25 17.4 57.5 NM NM NM
8/3/2015 22.24 BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL BQL NA NA NA NA NA NA 8.12 17.4 53.8 NM NM NM
3/23/2016 18.75 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA 5.60 17.6 52.1 NM NM NM
9/9/2016 21.30 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA BQL NA NA NA NA NA 5.60 17.6 52.1 NM NM NM
6/20/2017 21.06 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA 4.71 17.4 46.0 NM NM 6.52
5/10/2019 17.58 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA 4.57 17.4 52.1 203.7 NM 8.60
11/12/2014 23.15 BQL NA NA NA 1.94 BQL NA BQL NA NA NA NA NA 2.15 NA NA 12.3 BQL BQL BQL See Data NA NA BQL 402 109 BQL 5.31 17.5 59.5 NM NM NM
8/3/2015 22.65 BQL NA NA NA 1.14 BQL NA BQL NA NA NA NA NA 1.31 NA NA 13.1 BQL BQL BQL BQL NA NA NA NA NA NA 5.32 16.9 48.1 NM NM NM
3/23/2016 19.75 BQL BQL BQL BQL 2.49 BQL BQL BQL 14.5 BQL BQL 1.17 BQL 5.62 7.78 15.3 41.9 NA NA NA NA NA NA NA NA NA NA 5.56 17.4 50.3 NM NM NM
9/9/2016 21.20 0.95 BQL BQL BQL 27.7 BQL 6.99 BQL 27.4 1.33 8.17 4.99 3.34 10.9 115 49.3 193 NA NA NA NA BQL NA NA NA NA NA 5.56 17.4 50.3 NM NM NM
6/20/2017 21.37 BQL BQL BQL BQL 21.0 BQL 4.84 BQL 22.8 BQL 6.91 BQL 2.78 2.28 101 55.7 135 NA NA NA NA NA NA NA NA NA NA 4.53 17.9 38.0 NM NM 3.14
5/10/2019 17.31 BQL BQL BQL BQL 21.4 BQL 9.77 BQL 48.4 BQL 15.5 9.25 6.82 0.58 66.9 52.0 101 NA NA NA NA NA NA NA NA NA NA 4.39 17.2 51.1 197.1 NM 2.86
8/3/2015 21.74 6,610 NA NA NA 4,970 1,580 NA 11,600 NA NA NA NA NA 54,800 NA NA 44,900 132 67.6 621 See Data NA NA 79,700 68,730 62,049 BQL 4.93 19.0 101.9 NM NM NM
3/23/2016 17.51 1,370 BQL BQL BQL 2,120 97 153 BQL 497 BQL 311 BQL BQL 14,100 2,280 608 12,300 NA NA NA NA NA NA NA NA NA NA 5.81 19.1 193 NM NM NM
9/9/2016 19.95 5,070 BQL BQL 66 2,960 1,050 148 7,060 585 BQL 330 BQL BQL 30,400 2,500 601 17,700 NA NA NA NA 31.4 NA NA NA NA NA 5.81 19.1 193 NM NM NM
6/20/2017 20.36 3,550 BQL BQL BQL 3,260 686 118 4,690 530 BQL 418 BQL BQL 34,700 2,260 960 18,000 NA NA NA NA NA NA NA NA NA NA 4.92 19.4 93 NM NM 3.80
5/10/2019 16.18 2,810 BQL BQL BQL 2,330 264 145 1,280 5,730 BQL 309 BQL BQL 19,000 2,410 570 16,600 NA NA NA NA NA NA NA NA NA NA 5.54 19.0 79 149.4 NM 3.07
8/3/2015 20.53 BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA 2.69 NA NA 6.83 BQL BQL BQL BQL NA NA 183 260 260 BQL 4.63 18.3 414 NM NM NM
3/23/2016 15.17 BQL 2.71 60.7 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA 5.35 18.4 807 NM NM NM
9/9/2016 19.62 BQL BQL 3.94 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA BQL NA NA NA NA NA 5.35 18.4 807 NM NM NM
6/20/2017 18.06 BQL BQL 1.05 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA 4.14 18.1 156 NM NM 3.28
5/10/2019 14.22 BQL BQL 3.83 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA 4.36 17.6 57 207.0 NM 6.20
3/23/2016 16.00 BQL BQL 0.84 BQL BQL 1.43 BQL 38.9 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL 28.5 187 BQL BQL BQL 7.44 18.1 156.6 NM NM NM
9/9/2016 19.50 BQL BQL BQL BQL BQL 0.95 BQL 18.3 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA 187 BQL BQL BQL 7.44 18.1 156.6 NM NM NM
6/20/2017 18.98 BQL BQL 1.52 BQL BQL 1.45 BQL 63.6 BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA 5.18 18.0 86.0 NM NM 3.27
5/10/2019 14.80 BQL BQL 2.80 BQL BQL 1.75 BQL 63.4 BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA 4.77 18.2 57.7 182.9 NM 5.93
3/23/2016 17.29 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL 8.40 BQL BQL BQL BQL 9.20 17.8 42.4 NM NM NM
9/9/2016 20.91 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA BQL BQL BQL BQL 9.20 17.8 42.4 NM NM NM
6/20/2017 19.48 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA 4.48 18.3 39.0 NM NM 5.31
5/10/2019 16.96 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA 5.35 17.9 44.3 180.7 NM 7.63
6/20/2017 20.86 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA 4.80 17.3 34.0 NM NM 6.30
5/10/2019 16.68 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA 4.34 19.0 44.1 208.9 NM 7.12
8/3/2015 NM BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA 2.66 BQL BQL BQL See Data NA NA BQL BQL 132 BQL 9.56 18.1 328 NM NM NM
3/23/2016 19.18 BQL BQL 0.63 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA BQL NA NA NA NA 7.35 17.4 203 NM NM NM
9/9/2016 22.20 BQL BQL BQL BQL BQL BQL BQL BQL 0.69 BQL BQL BQL BQL BQL 0.82 1.26 1.27 NA NA NA NA BQL NA NA NA NA NA NM NM NM NM NM NM
6/20/2017 21.45 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA 9.45 17.7 189 NM NM 6.20
5/10/2019 18.23 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA 9.63 18.1 121 114.0 NM 7.23
3/23/2016 18.06 7.22 BQL BQL BQL 1.18 3.38 0.57 15.6 1.72 BQL BQL BQL BQL 5.94 7.98 BQL 29.7 BQL BQL BQL See Data 0.122 NA 155 184 BQL BQL 5.81 19.1 251 NM NM NM
9/9/2016 21.29 BQL BQL BQL BQL BQL 2.38 BQL 10.7 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL See Data NA NA BQL BQL BQL BQL NM NM NM NM NM NM
6/20/2017 20.67 BQL BQL BQL BQL BQL 2.27 BQL 6.70 BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA 6.01 18.0 149 NM NM 5.60
5/10/2019 16.76 0.54 BQL BQL BQL 3.12 1.47 BQL 1.90 BQL BQL BQL BQL BQL BQL 0.83 BQL 3.89 NA NA NA NA NA NA NA NA NA NA 5.68 18.1 71 145.9 NM 5.26
1 0.6 70 0.4 600 70 70 20 6 70 70 25 70 600 400 400 500 30 1 6 N/A 0.02 15 400 700 200 10,000 6.5-8.5 NS NS NS NS NS
5,000 N/A 70,000 400 84,500 70,000 25,000 20,000 6,000 6,900 30,000 11,700 8,500 260,000 28,500 25,000 85,500 12,500 1,000 5,000 N/A 50 15,000 NS NS NS NS NS NS NS NS NS NS
5 NS NS 5 700 NS NS NS NS NS NS NS NS 1,000 NS NS 10,000 NS NS NS N/A NS 15 NS NS NS NS NS NS NS NS NS NS
= Detected Concentration Exceeds the North Carolina 2L Groundwater Quality Standards (NC2LGWQS) or the EPA Drinking Water Standard as Applicable
= Detected Concentration Exceeds the GCL
BQL = Below Quantitation LimitsResults are reported in µg/l
µg/L = micrograms per liter
GCL = gross contamination level
TOC = top of casing
NS = No Standard
N/A = Not Applicable
EPH and VPH = Extractable and Volatile Petroleum Hydrocarbons
FP = Free Product
NA = Not Analyzed
NM = Not Measured
NC2LGWQS Standard (µg/l)
GCL (µg/l)
EPA Drinking Water Standard (µg/l)BromodichloromethaneMW-6
MW-7 ChloroformN-Propylbenzene1,2-DichloroethaneI-PropylbenzeneMW-1
MW-2
MW-3
MW-4
MW-5 IPEContaminant of Concern
BenzeneMW-9
DW-2
MW-8
DW-1
EPH & VPHAnalytical Method Field Measurements625BNA+10 TICs602 or 6200B
EthylbenzeneTolueneC19-C36 AliphaticsTotal Xylenes1-MethylnaphthaleneNaphthaleneTICs DetectedSec-Butylbenzene1,2,4-TrimethylbenzeneNaphthaleneN-Butylbenzenep-IsopropyltolueneORPDO (mg/L)CO2Temperature (ºC)MTBE1,3,5-TrimethylbenzeneC9-C18 AliphaticsC5-C8 AliphaticsEDBLead2-MethylnaphthalenepHConductivity (mS/cm)C9-C22 Aromatics
Table B-4
Summary of Groundwater Analytical Results
Groundwater Monitoring Report
Pagetown Exxon
504.1
Well ID Date Collected
(m/dd/yy)
Depth to Water
(Ft. Below TOC)BromodichloromethaneChloroformN-Propylbenzene1,2-DichloroethaneI-PropylbenzeneIPEContaminant of Concern
BenzeneEPH & VPHAnalytical Method Field Measurements625BNA+10 TICs602 or 6200B
EthylbenzeneTolueneC19-C36 AliphaticsTotal Xylenes1-MethylnaphthaleneNaphthaleneTICs DetectedSec-Butylbenzene1,2,4-TrimethylbenzeneNaphthaleneN-Butylbenzenep-IsopropyltolueneORPDO (mg/L)CO2Temperature (ºC)MTBE1,3,5-TrimethylbenzeneC9-C18 AliphaticsC5-C8 AliphaticsEDBLead2-MethylnaphthalenepHConductivity (mS/cm)C9-C22 Aromatics3/23/2016 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
9/9/2016 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
6/20/2017 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
5/10/2019 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
WSW-2 7/6/2015 --BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL NA NA NA NA NA NA NA NM NM NM NM NM NM
WSW-3 7/6/2015 --BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL NA NA NA NA NA NA NA NM NM NM NM NM NM
4/13/2015 --BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL NA NA NA NA NA NA NA NM NM NM NM NM NM
7/6/2015 --BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL NA NA NA NA NA NA NA NM NM NM NM NM NM
3/23/2016 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
9/9/2016 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
6/20/2017 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
5/10/2019 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
4/13/2015 --NA NA NA NA BQL BQL NA BQL NA NA NA NA NA NA NA NA NA BQL BQL BQL NA NA NA NA NA NA NA NM NM NM NM NM NM
7/6/2015 --BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL NA NA NA NA NA NA NA NM NM NM NM NM NM
3/23/2016 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
9/9/2016 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
6/20/2017 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
4/13/2015 --BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL NA NA NA NA NA NA NA NM NM NM NM NM NM
7/6/2015 --BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL NA NA NA NA NA NA NA NM NM NM NM NM NM
3/23/2016 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
9/9/2016 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
5/10/2019 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
WSW-9 7/6/2015 --BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL NA NA NA NA NA NA NA NM NM NM NM NM NM
WSW-10 7/6/2015 --BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL NA NA NA NA NA NA NA NM NM NM NM NM NM
4/13/2015 --BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL NA NA NA NA NA NA NA NM NM NM NM NM NM
7/6/2015 --BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL NA NA NA NA NA NA NA NM NM NM NM NM NM
3/23/2016 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
9/9/2016 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
5/10/2019 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
WSW-13 7/6/2015 --BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL NA NA NA NA NA NA NA NM NM NM NM NM NM
4/13/2015 --21.7 NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA 31.6 BQL BQL BQL NA NA NA NA NA NA NA NM NM NM NM NM NM
7/6/2015 --143 NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA 225 BQL BQL 17.0 NA NA NA NA NA NA NA NM NM NM NM NM NM
3/23/2016 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
4/12/2016 --7.1 BQL BQL 3.4 9.5 BQL 1.3 BQL 5.6 BQL BQL BQL BQL BQL 21.6 4.8 17.2 NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
9/9/2016 --32.6 BQL BQL 8.93 20.4 BQL 2.13 BQL 9.49 BQL BQL BQL BQL BQL 38.5 6.11 34 NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
6/20/2017 --3.05 BQL BQL 1.46 BQL BQL BQL BQL 1.09 BQL BQL 0.68 BQL BQL 6.35 1.34 3.54 NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
5/10/2019 --4.43 BQL BQL BQL 2.59 BQL BQL BQL 0.98 BQL BQL BQL BQL BQL 7.38 1.41 3.87 NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
WSW-16 7/6/2015 --BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL NA NA NA NA NA NA NA NM NM NM NM NM NM
WSW-17 7/6/2015 --BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL NA NA NA NA NA NA NA NM NM NM NM NM NM
4/13/2015 --BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL NA NA NA NA NA NA NA NM NM NM NM NM NM
7/6/2015 --BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL NA NA NA NA NA NA NA NM NM NM NM NM NM
3/23/2016 --BQL BQL BQL BQL 0.86 BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL 1.45 NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
9/9/2016 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL 1.47 NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
6/20/2017 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL 2.13 NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
5/10/2019 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
4/13/2015 --BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL NA NA NA NA NA NA NA NM NM NM NM NM NM
7/6/2015 --BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL NA NA NA NA NA NA NA NM NM NM NM NM NM
3/23/2016 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
9/9/2016 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
5/10/2019 --BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL NA NA NA NA NA NA NA NA NA NA NM NM NM NM NM NM
WSW-23 7/6/2015 --BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL NA NA NA NA NA NA NA NM NM NM NM NM NM
WSW-24 7/6/2015 --BQL NA NA NA BQL BQL NA BQL NA NA NA NA NA BQL NA NA BQL BQL BQL BQL NA NA NA NA NA NA NA NM NM NM NM NM NM
1 0.6 70 0.4 600 70 70 20 6 70 70 25 70 600 400 400 500 30 1 6 N/A 0.02 15 400 700 200 10,000 6.5-8.5 NS NS NS NS NS
5,000 N/A 70,000 400 84,500 70,000 25,000 20,000 6,000 6,900 30,000 11,700 8,500 260,000 28,500 25,000 85,500 12,500 1,000 5,000 N/A 50 15,000 NS NS NS NS NS NS NS NS NS NS
5 NS NS 5 700 NS NS NS NS NS NS NS NS 1,000 NS NS 10,000 NS NS NS N/A NS 15 NS NS NS NS NS NS NS NS NS NS
= Detected Concentration Exceeds the North Carolina 2L Groundwater Quality Standards (NC2LGWQS) or the EPA Drinking Water Standard as Applicable
= Detected Concentration Exceeds the GCL
BQL = Below Quantitation LimitsResults are reported in µg/l
µg/L = micrograms per liter
GCL = gross contamination level
TOC = top of casing
NS = No StandardN/A = Not Applicable
EPH and VPH = Extractable and Volatile Petroleum Hydrocarbons
FP = Free Product
NA = Not AnalyzedNM = Not Measured
WSW-6
EPA Drinking Water Standard (µg/l)
GCL (µg/l)
NC2LGWQS Standard (µg/l)
WSW-1
WSW-5
WSW-7
WSW-20
WSW-22
WSW-12
WSW-15
MAP ID OWNER NAME SITE ADDRESS MAILING ADDRESS WELL USE
APPROXIMATE
DISTANCE OF WELL
FROM SOURCE AREA
(FT.)
8173 Cherry Grove Road
Reidsville, NC 27320
8225 Cherry Grove Road
Reidsville, NC 27320
8173 Cherry Grove Road
Reidsville, NC 27320
8173 Cherry Grove Road
Reidsville, NC 27320
8173 Cherry Grove Road
Reidsville, NC 27320
8173 Cherry Grove Road
Reidsville, NC 27320
408 Maverick Trail Drive
King, NC 27021
3115 Pagetown Road
Elon, NC 27244
3115 Pagetown Road
Elon, NC 27244
191 Pagetown Road
Elon, NC 27244
59 Pagetown Road
Elon, NC 27244
59 Pagetown Road
Elon, NC 27244
53 Pagetown Road
Elon, NC 27244
59 Pagetown Road
Elon, NC 27244
59 Pagetown Road
Elon, NC 27244
955 Squaw Valley Trail
Burlington, NC 27217
7951 Cherry Grove Road
Reidsville, NC 27320
7821 Cherry Grove Road
Reidsville, NC 27320
7801 Cherry Grove Road
Reidsville, NC 27320
7925 Cherry Grove Road
Reidsville, NC 27320
7925 Cherry Grove Road
Reidsville, NC 27320
8062 Cherry Grove Road
Reidsville, NC 27320
Table B-5
Water-Supply Well Information 05/10/2019
Groundwater Monitoring Report
Pagetown Exxon
130
2 Melvin Butler 8225 Cherry Grove Road Potable 850
1 Inez Saunders Wrenn 8035 Cherry Grove Road Out-of-Use
640
4 Inez Saunders Wrenn 8173 Cherry Grove Road Potable 580
3 Inez Saunders Wrenn 8173 Cherry Grove Road Potable
132
6 Inez Saunders Wrenn 8101 Cherry Grove Road Potable 150
5 Inez Saunders Wrenn 8101 Cherry Grove Road Potable
352
8 Stephen Jones, Jr.120 Pagetown Road Potable 540
7 James Wrenn 78 Pagetown Road Potable
588
10 Jessica Fleeger 191 Pagetown Road Potable 910
9 Stephen Jones, Jr.120 Pagetown Road Potable
680
12 Garland Walker 59 Pagetown Road Potable 380
11 Garland Walker 127 Pagetown Road Potable
765
14 Garland Walker 7993 Cherry Grove Road Inactive 285
13 John Gibson 59 Pagetown Road Potable
345
16 Claude Sexton, Jr.7969 Cherry Grove Road Potable 460
15 Garland Walker 7993 Cherry Grove Road Potable
575
18 Donna Paschal 7821 Cherry Grove Road Potable 1,110
1,274
20 James Cheek 7925 Cherry Grove Road Potable 390
21 James Cheek 7998 Cherry Grove Road Out-of-Use
17 Hassell Terrell 7951 Cherry Grove Road Potable
19 Deborah Daye 7801 Cherry Grove Road Potable
322
22 William H. Saunders, Heirs 8062 Cherry Grove Road Potable 150
Map ID Name Mailing Address
8062 Cherry Grove Road
Reidsville, NC 27320
8173 Cherry Grove Road
Reidsville, NC 27320
59 Pagetown Road
Elon, NC 272443Garland Walker
Table B-6
Adjacent Property Owner Information
Groundwater Monitoring Report
Pagetown Exxon
1 William H. Saunders, Heirs
2 Inez Saunders Wrenn
5/10/2019
MW-1 10/22/2014 2 35 20-35 18.33 99.66 FP (0.10)81.33 FP (2.00)7.22 FP (0.44)78.12 FP (0.80')80.66 FP (5.55')73.17 FP (5.10')NR FP (1.71')78.15 FP (0.69')76.45
MW-2 11/11/2014 2 30 15-30 16.35 99.85
MW-3 11/11/2014 2 30 15-30 17.58 100.00
MW-4 11/11/2014 2 30 15-30 17.31 99.10
MW-5 7/23/2015 2 30 15-30 16.18 99.11
MW-6 7/23/2015 2 30 15-30 14.22 97.53
MW-7 3/17/2016 2 30 15-30 14.80 101.85
MW-8 3/16/2016 2 30 15-30 16.96 102.99
MW-9 6/2/2017 2 30 15-30 16.68 100.32
DW-1 7/22 & 23/2015 2 45 (I) 55(O)50-55 18.23 99.94
DW-2 3/16 & 17/2016 2 45 (I) 55(O)50-55 16.76 99.94
** - The top-of-casing elevation of each functioning well relative to a benchmark was established with an
assumed elevation of 100 feet (MW-3 TOC).
Please note: The depth to water measurement presented for MW-1 does not account for the presence of free product.
NR = Not Reported
NA = Not Applicable
NM = Not Measured
FP = Free Product
79.16
77.91
82.35
82.08
78.75
79.47
21.29
22.20
NA
20.91
19.50
19.62
19.95
82.87
83.51
79.27
78.49
79.46
81.79
82.93
83.31
87.05
86.03
83.64
20.36
18.06
81.71
83.18
18.98
19.48
20.86
21.45
20.67
NMNMNM
78.65
77.74
NM
NMNM
NM
NM
NM
NM
NM NM
NM
NM
NMNM
Table B-7
Well Construction Information and Historical Groundwater Elevations
Groundwater Monitoring Report
Pagetown Exxon
Well Diameter
(inches)
Relative Elevation
(feet TOC)Depth (feet)
Screen
Interval
(feet)
Installation DateMonitoring Well ID
Groundwater Elevation
(feet)
7/6/2015
Groundwater Elevation
(feet)
8/3/2015
Groundwater Elevation
(feet)
9/8/2016
Groundwater Elevation
(feet)
6/20/2017
Groundwater Elevation
(feet)
Groundwater Elevation
(feet)
3/23/2016
Groundwater Elevation
(feet)
4/13/2015
Depth to Water (feet
TOC)
Depth to Water
(feet TOC)
78.24
77.46
75.95
NM
NM
NM
NM
NM
NM
NM
NM
Groundwater Elevation
(feet)
5/10/2019
83.50
82.42
NM
NM
NM
11/11/2014
79.42
78.70
77.90
22.44
Depth to Water
(feet TOC)
6/20/2017
20.05
21.06
21.37
79.80
78.94
77.73
21.54
21.20
21.30
20.43
9/8/2016
78.67
77.76
NM
NM
NM76.45
82.20
81.25
79.35
85.85
85.70
NM
NM
NM
NM
77.37
NM
77.00
81.60
NM
82.36
Depth to Water (feet
TOC)
11/11/2014
NA
NA
NA
NA
NA
NA
NA
19.75
18.75
17.65
FP
Date Extraction Points
Elapsed Time
(Hours)
Vacuum
(inches of Hg)
Measured
Flow
Velocity
(ft/min)
Pipe ID
(in)
Temp
(deg F)
Temp (deg
C)
Rel. Humid
(%)
Water Vapor
(Wt %)
Water Vapor
(Vol %)
Qstd
(flow)
3/9/2015 Start 19.0 34.0 1691.879 2 96.3 35.7 86.7 0.03373 0.0513 33.2
3/10/2015 24 19.5 34.0 1691.879 2 96.8 36.0 86.0 0.03409 0.0518 33.2
3/11/2015 48 19.0 34.0 1691.879 2 97.0 36.1 91.2 0.03638 0.0551 33.0
3/12/2015 72 19.5 37.0 1841.162 2 84.9 29.4 91.6 0.02406 0.0371 37.5
3/13/2015 96 19.0 37.0 1841.162 2 98.4 36.9 62.5 0.02620 0.0403 36.4
Calculations
Qstd
Bws
Bwsw
Perry’s Chemical Engineers’ Handbook)
V
A
Ts
PAGETOWN EXXON
MW-1
TABLE B-8
MMPE RESULTS
= stack temperature in degrees Rankin (Ro), Ro = Fo + 460 (use average value)
= (60 sec/min) (1-Bws) (V) (A) (528 Ro / Ts)
= (Bwsw/18 lb-mole H2O) / [(1/28.84 lb-mole dry air) + (Bwsw/18 lb-mole H2O)]
= lb. of water per lb. of dry air (use high temperature psychrometric chart for air-water vapor mixtures in
= velocity in ft/sec (obtain with hot wire anenometer or pitot tube (use average value)
Coss-sectional area of discharge stack in square feet at sampling location
Elapsed
Time
(min)
Flow
(DSCFM)
PPM Measured
(ppm)
K
(#C-gas)PPMg
Cc:m
(mg/dsm^3)
Cc
(lb/dscf)
PMRc
(lb/hr)
PMRg
(lb/hour)
PMR
(lb)
1 33.2 5,000 4 20,000 10636 0.00066 1.324 1.532 36.737
1440 33.2 3,759 4 15,034 7995 0.00050 0.993 1.150 27.592
2880 33.0 2,791 4 11,162 5936 0.00037 0.735 0.850 20.408
4320 37.5 1,321 4 5,284 2810 0.00018 0.394 0.456 10.952
5760 36.4 1,106 4 4,424 2353 0.00015 0.321 0.372 0.372
5820 TOTAL EMISSIONS IN POUNDS 96.060
The MMPE cost $5,948.25 and, therefore, the cost per gallon of recovered contaminated groundwater was $3.16 per gallon.
The cost per gallon of recovered free product was $387.26 per gallon.
Calculations
PPMw = “wet” concentration
PPMd = “dry” concentration
PPMc = PPMv, volumetric concentration of VOC emissions as carbon, dry basis, at STP
Cc:m
Cc = Cc:m (62.43 x 10-9 lb-m3/mg-ft3), lb/dscf, mass concentration of VOC emissions as carbon, dry basis, at STP
PMRc = Cc (Qstd) (60 min/hr), lb/hr, pollutant mass removal rate of VOC’s as carbon
PMRg = (PMRc) (Mg/Mcg), lb/hr, pollutant mass removal rate of VOC’s as gasoline
K = number of carbons in calibration gas (methane K=1, propane K=3, hexane K=6)
Mc = 12.01 mg/mg-mole, molecular wt. of carbon
K3 = 24.07 dsm3/106 mg-mole, mass to volume conversion factor at STP
Cc = lb/dscf, mass concentration of VOC emissions as carbon, dry basis, at STP
Mg = 103 mg/mg-mole, molecular wt. of gasoline (value may vary depending on contaminant)
Mcg = 89 mg/mg-mole, weight of carbon in gasoline molecule
Average values for molecular weight of gasoline, weight of carbon in gasoline molecule, and the conversion of pounds of gasoline emissions to gallons
of liquid gasoline are from Automotive Fuels Reference Book, by K. Owens and T. Coley, Second Edition, 1995, published by the Society
of Automotive Engineers.
PAGETOWN EXXON
NOTE: To convert lbs. of gasoline emissions to gallons of liquid gasoline, divide by 6.25 lbs/gal.
= PPMc (Mc/K3)
TABLE B-9
MMPE RESULTS
APPENDIX
FIELD DATA SHEETS
APPENDIX
LABORATORY DATA SHEETS AND CHAIN-OF-CUSTODY RECORD