WS-2442_3329_CA_IAR_20140411

Initial Abatement Action Report
Former One Stop Store #2

YOCO, Inc.
Kernersville, North Carolina

H&H Job No. YOC-109
April 11, 2014

Via FedEx 2nd Day

April 11, 2014

NC DENR
Division of Waste Management/UST Section
585 Waughtown Street
Winston-Salem, NC 27107

Attention: Mr. Thomas Moore

Re: Initial Abatement Action Report
Former One Stop Store #2
7190 Vance Road
Kernersville, North Carolina
H&H Job No. YOC-109

Dear Mr. Moore:
On behalf of YOCO, Inc., Hart & Hickman, PC (H&H) is providing the attached Initial
Abatement Action (IAA) Report for the above-referenced site.

If you have any questions or comments, please do not hesitate to contact me.

Very truly yours,
Hart & Hickman, PC
Stephen R. Libbey, PG
Senior Project Geologist

cc: Mr. Jerry Atkins, YOCO, Inc.
Mr. Joe Clark
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Initial Abatement Action Report
A. Site Information
1. Site Identification Date of Report: April 11, 2014
Facility ID: 00-0-0000001976 UST Incident Number: 3329
Site Name: Former One Stop Store #2
Site Street Address: 7190 Vance Road
City, Town: Kernersville Zip Code: 27284 County: Forsyth Description of Geographical Data Point: Center of dispenser canopy
Location Method: Google Earth
Latitude: 36.174598N Longitude: 80.090738W

2. Information about Contacts Associated with the Leaking UST System UST Owner: YOCO, Inc.
Address: P.O. Box 48, Mt. Airy, NC 27030 Tel.: [phone]
UST Operator: Joe Clark
Address: 217 North Main Street, Kernersville, NC 27284 Tel.: [phone]
Property Owner: Joe Clark Address: 217 North Main Street, Kernersville, NC 27284 Tel.: [phone]
Property Occupant: Joe Clark
Address: 217 North Main Street, Kernersville, NC 27284 Tel.: [phone]
Consultant/Contractor: Hart & Hickman, PC
Address: 2923 South Tryon Street, Suite 100, Charlotte, NC 28203 Tel.: [phone] (Attn: Steve Libbey, PG)
Analytical Laboratory: Prism Laboratories, Inc. State Cert. No. 402
Address: 449 Springbrook Road, Charlotte, NC 28224
Tel.: [phone]
3. Information About Release Date Discovered: January 6, 2014
Estimated Quantity of Release: Unknown
Cause of Release: Unknown
Source of Release: Gasoline Underground Storage Tank (UST) system Sizes and contents of UST system: Two 6,000-gallon gasoline USTs and one
4,000-gallon kerosene UST

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B. Site History and Characterization 1. UST Owner and Operator Information:
UST ID Number UST-1 through UST-8 Facility ID Number 0-0000001976
Name of Owner Dates of Ownership
YOCO, Inc. 1979 to 2014
Street Address
P.O. Box 48
City State Zip Telephone Number
Mt. Airy NC 27030 [phone]
Name of Operator Dates of Operation
Joe Clark 1981 to 2014
Street Address
217 North Main Street
City State Zip Telephone Number
Kernersville NC 27284 336-996-4361
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2. UST/AST Information:
UST ID
Number
Current/Last
Contents
Previous
Contents
Capacity
(gallons)
Construction
Details
Approximate Tank Dimensions
Description of Associated Piping and Pumps
Date Tank
Installed
Status of
UST
Was release associated with the UST System?
UST-1 Gasoline Gasoline 2,000 Steel ~64” x 12’ Steel; extended to dispenser Unknown Removed Yes
UST-2 Gasoline Gasoline 2,000 Steel ~64” x 12’ Steel; extended to dispenser Unknown Removed Yes
UST-3 Gasoline Gasoline 1,000 Steel ~64” x 6’ Steel; extended to
dispenser Unknown Removed Yes
UST-4 Gasoline Gasoline 10,000 Steel ~120” x 18’ Steel; extended to dispenser 1980 Removed 1989 Unknown
UST-5 Gasoline Gasoline 8,000 Steel ~120” x 14’ Steel; extended to
dispenser 1981 Removed
1989 Unknown
UST-6 Gasoline Gasoline 6,000 Steel 8’ x 16’ Steel; extended to dispenser 1989 Removed 2014 Yes
UST-7 Gasoline Gasoline 6,000 Steel 8’ x 16’ Steel; extended to
dispenser 1989 Removed
2014 Yes
UST-8 Kerosene Kerosene 4,000 Steel 5’ x 24’ Steel; extended to
dispenser 1989 Removed
2014 Yes

AST ID Number Current/Last Contents Previous Contents Capacity (gallons) Construction Details Tank Dimensions
Description of
Associated Piping and Pumps
Date Tank Installed Status of AST
Was release
associated with the
AST System?
AT-1 Fuel Oil Fuel Oil ~200 Steel ~42” x 4’ Extends to
Building ~1989 Removed 2014 No
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3. Non-UST spills at the site: No non-UST spills are known to have occurred at the site.

4. Description of release: A suspected release was identified on January 6, 2014 during the removal of
two 6,000-gallon gasoline USTs (UST-6 and UST-7) and one 4,000-gallon
kerosene UST (UST-8). The North Carolina Department of Environment and
Natural Resources (DENR) was notified of the release on January 6, 2014 via
telephone and on January 8, 2014 via a 24-Hour Release and UST Leak Reporting form (UST-61). A copy of this form is provided in Appendix A. The
suspected release was confirmed on January 15, 2014 upon receipt of the
laboratory analytical data for the closure soil samples. UST closure soil sample
results are discussed further in Section D below.
5. Site characteristics: The site is approximately 0.41 acre in area and contains an approximate 1,120-
ft2 convenience store building. A site location map is presented as Figure 1, and
a site map is presented as Figure 2.
The subject property is located in the Piedmont Physiographic Province of North Carolina. According to the Geologic Map of North Carolina dated 1985,
the subject property lies within the Charlotte Belt. In the site area, underlying
bedrock is composed of granitic rock. The land surface of the area is generally
characterized as gently sloping, which may become moderately steep where intersected by streams.
In the Piedmont, the bedrock is overlain by a mantle of weathered rock termed
saprolite or residuum. The saprolite consists of unconsolidated clay, silt, and
sand with lesser amounts of rock fragments. Due to the range of parent rock types and their variable susceptibility to weathering, the saprolite ranges widely in color, texture, and thickness. Generally, the saprolite is thickest near
interstream divides and thins toward streambeds. In profile, the saprolite
normally grades from clayey soils near the land surface to highly weathered
rock above competent bedrock. The occurrence and movement of groundwater in the Piedmont is typically
within two separate but interconnected water-bearing zones. A shallow water-
bearing zone occurs within the saprolite, and a deeper water-bearing zone
occurs within the underlying bedrock. The site is located at an approximate elevation of 860 ft above mean sea level.
Topography in the source area generally slopes to the northeast (Figure 1).
Based on historical groundwater elevation data, the groundwater flow direction
at the site is to the northeast.

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Visual observations during excavation activities and soil sample collection
indicated that the soil surrounding the UST systems consisted of reddish-orange
clay and red to tan clayey silt underlain by orange to tan silt (saprolite).
Groundwater was encountered in the excavation at a depth of approximately 24 ft.

As part of ongoing assessment activities at the site, the last receptor survey
update for the site was completed in July 2007. The results of the survey
indicated that Forsyth County water is provided to the site and is available to properties within a 1,500-foot radius of the site. Six water supply wells were
confirmed as being used for drinking water within 1,000-foot radius of the site
at that time. The 2007 water supply well results are included in Appendix B.

The active drinking water wells within 500 ft of the source area were sampled during the IAA activities. The water supply well sampling results are discussed
in Section F. H&H is currently completing an updated receptor survey for the
area surrounding the site. Additionally, YOCO is evaluating connecting the
active water supply users to municipal water to expedite incident closure.
No surface water bodies are located within 500 feet of the source area. A
tributary to Belews Creek is located approximately 1,900 feet east of the source
area and Belews Creek is located approximately 2,500 feet northwest of the
source area.
6. Initial abatement actions, assessment activities, and corrective actions performed to date: In July 1986, Mr. Walter James (7210 Vance Road) contacted the North
Carolina Department of Environment and Natural Resources (NCDENR) to
report strong gasoline odors in water from his water supply well. NCDENR and the Forsyth County Health Department collected water samples from Mr.
James’ well and the One Stop Store #2 water supply well. Petroleum
hydrocarbons were identified in the James’ water supply well sample.

In March 1988, NCDENR installed and sampled five shallow monitoring wells at the site. NCDENR also collected groundwater samples from the One Stop
Store #2 water supply well and surrounding water supply wells, including the
James supply well. Petroleum hydrocarbons were identified in two of the
monitoring wells and the James supply well. The monitoring wells were
abandoned at a later date.
A Notice of Violation (NOV) for the release was issued to YOCO on February
10, 1989. In response to the NOV, YOCO removed the leaking UST system.

In April and May 1990, NCDENR contracted with Geophex, Ltd. (Geophex) to complete a soil and groundwater assessment at the subject site. Six
groundwater monitoring wells (GMW-1 through GWM-6) and ten soil borings

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were installed and sampled. Additionally, nine water supply wells also were
sampled. Petroleum hydrocarbons were identified in three of the water supply
wells and monitoring wells GMW-5 and GMW-6. Petroleum hydrocarbons also
were detected in seven of the soil borings.
In April of 1991, extraction well EW-1 was installed at the site in order to
initiate free product recovery. The free product recovery system operated at the
site from November 1991 to 1994. In 1994, a groundwater pump and treat
system was implemented at the site. The pump and treat system operated from November 1991 to July 2001.

In April 1998, monitoring wells GMW-7 and GMW-8 were installed because
monitoring wells GMW-3, GMW-4 and GMW-5 were repeatedly dry during
sampling events. Additionally, at the request of NCDENR, ten soil borings were installed at the site to further define the extent of soil impacts in April
1998. Gasoline-range total petroleum hydrocarbons (TPH-GRO) were detected
in two soil samples located near the existing and former dispenser islands above
the NCDENR action levels. The results of investigation are discussed in further
detail in Waters Edge Environmental’s (Waters Edge) Soil and Groundwater Assessment Report dated January 22, 1999.

In July 2001, free product was detected in monitoring well GMW-6. Because
the groundwater pump and treat system was not designed to recover free
product, it was shut down and free product recovery using Aggressive Fluid Vapor Recovery (AFVR) was initiated in July 2001. Three additional AFVR
events were conducted in August, October and December 2001. A total of
approximately 1,101 gallons of wastewater and free product were recovered
during the events.
In an attempt to locate the source of the free product, YOCO conducted tank
tightness testing for the tanks and associated piping in July 2001. All tanks and
piping tested tight. The product transfer lines were retested on August 27, 2001
and were found to be tight. Additionally, YOCO also excavated soils in the
vicinity of the two gasoline USTs and associated piping, and completed a geophysical survey to determine the source of the release. No obvious source of
free product was identified during the excavation and no magnetic anomalies
large enough to be an orphan UST were identified during the geophysical
survey.
In November 2001, GeoChem, Inc. collected a sample of free product from
GMW-6 for fuel identification. The results of the fuel analysis indicated that
the free product was fresh gasoline less than ten years old.

Between November 2001 and September 2002, shallow aquifer monitoring wells MW-9 through MW-13, and vertical extent well VE-1 were installed at
the site to further define the extent of impacts as part of two separate

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Comprehensive Site Assessment (CSA) addendums conducted by Waters Edge.
The results of the CSA addendums revealed that the groundwater hydrocarbon
plume was primarily located on-site and the adjacent downgradient James
property. In both reports, Waters Edge recommended preparing a CAP Addendum to evaluate remedial options for soil and groundwater at the site.
Following submittal of the second CSA Report Addendum dated January 16,
2003, NCDENR required the submittal of a CAP Addendum for the site in a
letter dated January 22, 2003. The letter also indicated that quarterly
monitoring should be conducted.
Waters Edge prepared a CAP and NCDENR requested CAP Addendum on
March 24, 2003 and April 8, 2003, respectively. The CAP and CAP Addendum
proposed abandoning all potable and non-potable water supply wells within
250 ft of the source area combined with source area soil excavation.
Between February 2003 and October 2005, Waters Edge conducted quarterly
groundwater monitoring at the site as required by NCDENR. During this time
period, Waters Edge also pursued abandoning the surrounding water supply
wells within 250 ft from the source area. According to Waters Edge August 2005 Groundwater Monitoring and Well Abandonment Report dated
October 10, 2005, in September 2005 the on-site water supply well and three
other surrounding wells were abandoned. The report concluded that all water
supply wells within 250 ft of the source area had been abandoned and
recommended that NCDENR issue a Notice of No Further Action for the incident following preparation of a Notice of Residual Petroleum.

As requested by DENR, an updated receptor survey and monitoring wells
GMW-1, GMW-2, GMW-4, GMW-5, GMW-6, GMW-7, MW-9, MW-10,
MW-11 and EW-1 were sampled on July 10, 2007. Laboratory analytical results indicated the presence of petroleum-related compounds exceeding the
groundwater standards in monitoring wells GMW-6, GMW-7 and EW-1. As
previously discussed, six water supply wells were confirmed as being used for
drinking water within 1,000-foot radius of the site at that time.
In January 2014, YOCO, Inc. contracted with EVO Corporation (EVO) of
Winston-Salem, NC to remove the gasoline (UST-6 and UST-7) and kerosene
(UST-8) UST systems at the site. Prior to the removal activities, monitoring
wells GMW-6, EW-1 and VE-1 were properly abandoned.
During the removal of UST-6 and UST-7 and the associated product piping and
product dispenser, field screening with a photo-ionization detector (PID)
indicated the presence of elevated organic vapor concentrations in the soil
beneath the USTs and associated product piping and dispenser. No soil impacts
were identified beneath UST-8 or its product piping; however, soil impacts were identified beneath the product dispenser for UST-8.

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Based on the field evidence of impacted soils in the vicinity of the USTs at the
time of closure, soil over-excavation activities were initiated following UST
removal in accordance with DENR guidance. The results of the soil over-
excavation activities are discussed in Section D below.
C. Site Check Report Not applicable.

D. UST Closure Report following UST-12 format and Site Investigation Report for Permanent Closure or Change-in-Service of UST (UST-2 Form)
1. Preparations for closure including the steps taken to notify authorities,
permits obtained and the steps taken to clean and purge the tanks:
Prior to UST closure activities, H&H submitted a Notice of Intent for UST Closure or Change-in-Service (UST-3) Form to DENR (Appendix C). The Site
Investigation UST-2 form also is attached. EVO obtained a permit from the
Forsyth County Fire Marshal’s office authorizing the UST removals.

On January 6, 2014, others removed an unknown volume of residual product from the USTs. Prior to removal from the ground, the USTs were purged with
dry ice to remove combustible vapors. Dry ice was applied at a rate of 1.5 lbs
per 100 gallons of tank capacity. A combustible gas indicator was used to
check that potentially combustible vapors dissipated prior to UST removal.
2. Closure procedures: Initially, soil was removed from the top and sides of the USTs with a track hoe
so that the tanks could be removed from the ground. Soils encountered during
the excavation were evaluated in the field for the presence of odors and staining,
and for the presence of organic vapor readings with a PID. The PID was calibrated prior to its use against an isobutylene standard.

Following removal, the USTs were inspected for holes or other signs of
structural damage. The USTs were single-walled and constructed of steel. No
evidence of holes or structural damage was observed on the USTs following removal.

Subsurface product piping connected to the USTs also was removed for proper
disposal. Product piping was constructed of steel. No holes were observed in
the product piping.
3. Note the amount of residual material pumped from the tank and describe the storage, sampling and disposal of the residual material and the disposal
of the tank, pumps and piping:
As stated above, an unknown volume of residual product was removed from the USTs prior to the closure activities by others.

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The USTs were transported off-site by EVO for disposal at Triad Metal
Recycling in Yadkinville, NC. The tank disposal certificate is included in
Appendix D.
4. Initial response actions and initial abatement actions: Initial response and abatement actions are discussed in the following section.

5. Soil excavation activities:
Approximately 2,274 tons of impacted soils were excavated from the gasoline UST basin and associated product piping and product dispenser excavation.
The excavated soil was either directly loaded onto dump trucks or stockpiled
on-site for off-site disposal at a later date. Impacted soils were transported to
EVO’s treatment facility in Winston-Salem, NC for proper disposal. A copy of
the certificate of disposal, non-hazardous waste manifests, and certified weight tickets for the excavated soil are provided in Appendix E.

Apart from directly below the gasoline USTs, impacted soils were excavated
vertically up to five feet below the surface of the water table (29 feet). Beneath
the gasoline USTs, impacted soils were excavated to a depth of approximately 18 feet below ground surface based on OVA readings. The final dimensions of
the UST basin excavation were approximately 74 ft long by 48 ft wide by 26-
29 ft deep; however, the basin was irregular shaped. The approximate extent of
the soil excavation is depicted on Figure 3.
H&H collected composite soil samples (labeled Truck-1 through Truck-8) from
the soil excavated from the excavation. The samples were analyzed for TPH-
GRO by EPA Method 5030/8015M. The results of the composite sampling
indicate that TPH-GRO was detected as high as 4,400 mg/kg. The analytical
results are summarized in Table 1, and the laboratory analytical report is included in Appendix F.

Following soil removal, the excavation was backfilled with clean backfill
material. The backfill material was placed in lifts in the excavations and
compacted using a vibratory roller to bring the excavations up to grade. The backfill material consisted primarily of red to brown silts. The excavation
surface was completed with asphalt.

6. Site investigation:
After removal of the USTs and associated product piping and dispensers and prior to impacted soil excavation, eleven closure soil samples were collected in
accordance with the Underground Storage Tank Section Guidelines for Site
Checks, Tank Closure, and Initial Response and Abatement dated March 1,
2007, effective December 1, 2013. The gasoline UST system soil samples were
analyzed for TPH-GRO by EPA Method 5030/8015M and the kerosene UST system soil samples were analyzed for TPH-GRO by EPA Method 5030/8015M

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and TPH-DRO by EPA Method 3550/8015M. The approximate locations of the
closure samples are depicted on Figure 3.

It is important to note that soil samples PL-2 and DI-2 were sampled beneath unused product piping. Soil sample PL-2 was collected near the center of the
product piping and soil sample DI-2 was collected at the end of the product
piping. The piping was originally installed to supply a second dispenser in the
future. The dispenser was never installed and the piping was never utilized.
The UST closure samples analytical results indicated the presence of TPH-GRO
and TPH-DRO above the North Carolina Action Levels of 10 mg/kg. TPH-
GRO (as high as 410 mg/kg) was detected in closure samples collected beneath
the gasoline UST system and TPH-DRO (22 mg/kg) was detected in the soil
sample collected beneath the kerosene dispenser.
Following over-excavation activities, nine confirmation sidewall samples (SW-
1 through SW-9) and one confirmation base sample (Base-1) were collected
from the gasoline UST system excavation and one confirmation soil sample was
collected in the location of the kerosene product dispenser closure sample (DI-K-1). In accordance with DENR guidance, the gasoline post-excavation
confirmation soil samples were analyzed for volatile organic compounds
(VOCs) by EPA Method 8260B/5035A and volatile petroleum hydrocarbons
(VPH) using the Massachusetts Department of Environmental Protection
(MADEP) Method. The kerosene product dispenser confirmation sample was analyzed for VOCs by EPA Method 8260B/5035A, semi-VOCs (SVOCs) by
EPA Method 8270, and extractable petroleum hydrocarbons (EPH) and VPH
using the MADEP Methods.

It is important to note that during the gasoline system soil excavation, former gasoline product piping was encountered near the front of the store building
(Figure 3). During removal of the piping, soil impacts were discovered beneath
a union in the piping. The soil impacts were excavated to the maximum extent
possible; however, due to the close proximity of the store building, soil
excavation was limited in the vertical direction. The final dimensions of the trench excavation were approximately 10 ft long by 4 ft wide by 7 ft deep. One
soil sample (PL-3) was collected at the base of the trench excavation and
analyzed for VOCs by EPA Method 8260B/5035A and VPH using the MADEP
Method.
The results of analyses of the post-excavation samples from the gasoline system
excavation indicated that post-excavation samples Base-1, SW-4, and SW-6
contained compound concentrations above DENR soil-to-groundwater
Maximum Soil Contaminant Concentrations (MSCCs). Additionally, soil
sample PL-3 collected beneath the former gasoline product piping trench excavation contained compound concentrations above DENR soil-to-
groundwater MSCCs. Concentrations did not exceed residential or

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commercial/industrial MSCCs. The remaining detected compounds in the
samples were not detected above soil-to-groundwater MSCCs.

Please note that the impacted soils in the vicinity of soil sample SW-4 were later removed during the gasoline UST system excavation activities.

All of the soil samples were analyzed by a North Carolina certified laboratory.
A chain-of-custody record was completed for samples collected and included
sample description, date collected, time collected, matrix, sample container information, and analyses required. The chain-of-custody was signed by H&H
prior to placement in an iced cooler for shipment to the laboratory. Prior to
shipment, the cooler was closed with a seal indicating the H&H representative’s
signature and date such that a potential disturbance of the cooler contents could
be detected by the laboratory.
The excavation areas and post-excavation soil sample locations are depicted on
Figure 3. Post-excavation soil sample results are presented in Table 2.
Laboratory analytical sheets are included in Appendix F.
E. Free Product Investigation and Recovery Report No free product was observed or recovered during the IAA activities.

F. Groundwater and Surface Water Investigation
During the IAA activities, active drinking water wells located within 500 ft of the source area were sampled on February 10, 2014 in accordance with DENR
guidelines. These wells are located at 1820 Kerner Road and 120 Kerner Knolls
Drive. Groundwater samples were analyzed for VOCs by EPA Method 6200B.

No petroleum-related compounds were detected in the wells. The non-petroleum compound chloroform was detected in water supply well 1820 Kerner Road. This
compound is not associated with petroleum releases and the source of the compound
is unknown.

The laboratory analytical datasheets are provided in Appendix F.
G. Initial Response and Abatement Activities See Section B.

H. Excavation of Contaminated Soil See Section D.
I. Conclusions and Recommendations:
In January 2014, two 6,000-gallon gasoline USTs and one 4,000-gallon kerosene
UST were removed from the site. Approximately 2,274 tons of impacted soils were excavated from the UST basin and associated product piping and product dispenser

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excavation. Results of post-excavation confirmation soil sampling indicate
compound concentrations above DENR soil-to-groundwater MSCCs.

Based on the results of the IAA activities, H&H recommends conducting a comprehensive groundwater sampling event at the site. Prior to the event, a
new monitoring well will be installed between former monitoring wells GMW-6 and
EW-1. Monitoring wells GMW-1, GMW-2, GMW-4, GMW-5, GMW-7, MW-9,
MW-10, MW-11, MW-12, MW-13, and the new well should be sampled for VOCs
by EPA Method 6200B.
As previously discussed, H&H is currently completing an updated receptor survey for
the surrounding area and YOCO, Inc. is evaluating connecting the drinking water
wells within 1,000 ft of the source area to the municipal water supply. If the water
supply well users are connected to the municipal water supply and groundwater VOC concentrations are detected below DENR gross contamination levels (GCLs), a risk-
based closure should be warranted for the site.

Table 1
Summary of UST Closure and Stockpile Soil Sample Results
Former One Stop Store #2
Kernersville, North Carolina
H&H Job. No. YOC-109
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Table 1 (Page 1 of 1)
Hart & Hickman, PC
5030/
8015M
3550/
8015M
Sample ID
Date
Collected Source Area
Sample
Depth (ft)
Incident
Phase
CS-1 01/07/14 UST 12 CL <5.1 NA
CS-2 01/07/14 UST 12 CL 7.0 NA
CS-3 01/07/14 UST 12 CL <5.9 NA
CS-4 01/08/14 UST 12 CL 390 NA
Dl-1 01/08/14 PL 3 CL 410 NA
Pl-2 01/10/14 PL 3 CL 5.5 NA
DI-2 01/10/14 DIS 3 CL 5.6 NA
Base-K-1 01/30/14 UST 8 CL <5.3 <9.6
Base-K-2 01/30/14 UST 8 CL <5.1 <9.4
Base-K-3 01/30/14 UST 8 CL <6.5 <10
DI-K-1 01/30/14 DIS 2 CL <4.2 22
TRUCK-1 01/10/14 SP NA CL 320 NA
TRUCK-2 01/10/14 SP NA CL <7.5 NA
TRUCK-3 01/14/14 SP NA CL 4,400 NA
TRUCK-4 01/15/14 SP NA CL 4,900 NA
TRUCK-5 01/16/14 SP NA CL 3,000 NA
TRUCK-6 01/17/14 SP NA CL 2,100 NA
TRUCK-7 01/20/14 SP NA CL 320 NA
TRUCK-8 01/30/14 SP NA CL 140 NA
10 10
Notes:
Concentrations are reported in milligrams per kilogram (mg/kg).
Bold concentrations exceed appropriate standard.
TP
H
-
G
R
O
TP
H
-
D
R
O

UST = Underground Storage Tank Basin; PL = Product Line; DIS = Dispenser; SP = Stockpile; CL = Closure;
NA = Not Analyzed/Not Applicable; TPH = Total Petroleum Hydrocarbons; DRO = Diesel Range Organics;
GRO = Gasoline Range Organics
Analytical Method
Contaminant of Concern
Action Level (mg/kg)
Table 2
Summary of Confirmation Soil Sample Results
Former One Stop Store #2
Kernersville, North Carolina
H&H Job. No. YOC-109
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Table 2 (Page 1 of 1)
Hart & Hickman, PC
MADEP MADEP MADEP MADEP MADEP MADEP MADEP MADEP 8260B 8260B 8260B 8260B 8260B 8260B 8260B 8260B 8260B 8260B 8260B 8260B 8260B 8260B 8260B 8270D
Sample ID
Date
Collected Source Area
Sample
Depth (ft)
Incident
Phase
SW-1 01/10/14 UST 14-15 IA <19 <19 NA <19 NA <19 NA <19 <0.063 <0.0038 <0.0063 <0.0063 <0.0063 <0.0063 <0.0063 <0.0063 <0.013 <0.013 <0.0063 <0.0063 <0.0063 <0.0063 <0.019 NA
SW-2 01/10/14 UST 14-15 IA <17 <17 NA <17 NA <17 NA <17 <0.058 <0.0035 <0.0058 <0.0058 <0.0058 <0.0058 <0.0058 <0.0058 <0.012 <0.012 <0.0058 <0.0058 <0.0058 <0.0058 <0.017 NA
SW-3 01/10/14 UST 14-15 IA <3.3 <3.3 NA <3.3 NA <3.3 NA <3.3 0.074 <0.0038 <0.0064 <0.0064 <0.0064 <0.0064 <0.0064 <0.0064 <0.013 <0.013 <0.0064 <0.0064 <0.0064 <0.0064 <0.019 NA
SW-4 01/10/14 UST 14-15 IA <19 <19 NA <19 NA <19 NA <19 <0.062 0.029 <0.0062 <0.0062 0.0087 <0.0062 <0.0062 <0.0062 0.87 <0.012 <0.0062 <0.0062 <0.0062 <0.0062 <0.019 NA
SW-5 01/14/14 UST 14-15 IA <9.1 <9.1 NA <9.1 NA <9.1 NA <9.1 <0.063 0.0052 <0.0063 <0.0063 <0.0063 <0.0063 <0.0063 <0.0063 <0.013 <0.013 <0.0063 <0.0063 <0.0063 <0.0063 <0.019 NA
SW-6 01/17/14 UST 14-15 IA <7.8 <7.8 NA <7.8 NA <7.8 NA <7.8 0.066 0.080 <0.0059 <0.0059 0.014 0.018 <0.0059 <0.0059 0.18 <0.012 <0.0059 0.011 0.015 <0.0059 0.058 NA
SW-7 01/20/14 UST 14-15 IA <9.4 <9.4 NA <9.4 NA <9.4 NA <9.4 0.11 <0.0033 <0.0055 <0.0055 <0.0055 <0.0055 <0.0055 <0.0055 0.023 <0.011 <0.0055 <0.0055 <0.0055 <0.0055 <0.017 NA
SW-8 01/20/14 UST 14-15 IA <8.4 <8.4 NA <8.4 NA <8.4 NA <8.4 <0.059 <0.0035 <0.0059 <0.0059 <0.0059 <0.0059 <0.0059 <0.0059 0.016 <0.012 <0.0059 <0.0059 <0.0059 <0.0059 <0.018 NA
SW-9 01/20/14 UST 14-15 IA <10 <10 NA <10 NA <10 NA <10 0.17 <0.0043 0.012 0.0075 <0.0071 <0.0071 <0.0071 <0.0071 <0.014 <0.014 0.010 <0.0071 0.023 <0.0071 <0.021 NA
Base-1 01/10/14 UST 16 IA <20 <20 NA <20 NA <20 NA <20 0.12 0.0076 <0.0067 <0.0067 <0.0067 <0.0067 <0.0067 <0.0067 0.016 <0.013 <0.0067 <0.0067 <0.0067 <0.0067 <0.020 NA
PL-3 01/30/14 PL 7 IA <6.8 9.0 NA 9.0 NA <6.8 NA <6.8 0.069 0.0044 0.032 0.015 <0.0050 0.073 0.017 0.15 0.033 0.99 0.067 0.086 3.2 0.15 0.48 NA
DI-K-1 01/30/14 DI 2 IA <6.6 <6.6 <12 BRL <12 <6.6 <12 BRL 0.22 <0.0023 <0.0038 <0.0038 <0.0038 <0.0038 <0.0038 <0.0038 <0.0076 <0.0076 <0.0038 <0.0038 <0.0038 <0.0038 <0.011 ALL BRL
68 NS NS 540 Immobile NS NS 31 24 0.0056 4.3 3.3 0.37 4.9 1.7 0.12 0.091 0.16 1.7 4.3 8.5 8.3 4.6 Varies
939 NS NS 1,500 31,000 NS NS 469 14,000 18 626 626 156 1,560 1,564 100 350 313 626 1,200 782 782 3,129 Varies
24,528 NS NS 40,000 810,000 NS NS 12,264 360,000 164 16,350 16,350 4,088 40,000 40,880 4,000 3,100 8,176 16,350 32,000 20,440 20,440 81,760 Varies
Notes:
Apart from VPH and EPH, only those compounds detected are shown.
Concentrations are reported in milligrams per kilogram (mg/kg).Values in bold exceed applicable Soil-to-Groundwater MSCC.
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(
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Appendix A

24-Hour Release and UST Leak Reporting Form (UST-61)

Appendix B

2007 Receptor Survey Results

Appendix C

UST Closure Forms (UST-2 and UST-3)

Appendix D

Tank Disposal Certificate

Appendix E

Certificate of Disposal, Non-Hazardous Waste Manifests, and Weight Tickets
(Impacted Soil)

Appendix F

Laboratory Analytical Reports