WS-6208_23218_CA_MRP_20240624

WATER RESOURCES • ENVIRONMENTAL SERVICES • INDUSTRIAL HYGIENE • SAFETY • AIR QUALITY • SUSTAINABILITY AND CLIMATE CHANGE
Apex Companies, LLC  7724 Garland Circle  Roanoke, VA 24019
T 540.563.4920  F 540.563.4921  apexcos.com
ANNUAL GROUNDWATER
MONITORING REPORT: 2024
Casville Mart
10971 U.S. Highway 158
Ruffin, Caswell County, North Carolina
Groundwater Incident #23218
Submitted To:
Ms. Linda Estkowski
North Carolina Department of Environmental Quality
Division of Waste Management
Underground Storage Tank Section
585 Waughtown Street
Winston-Salem, North Carolina 27107
Prepared For:
Mr. Barry L. McKinney
Davenport Energy, Inc.
P.O. Box 879
Chatham, Virginia 24531
Prepared By:
Apex Companies, LLC
7724 Garland Circle
Roanoke, Virginia 24019
June 24, 2024
Apex Project No.: 24005279
Prepared By: Reviewed By: Reviewed By:
Logan A. Matz Donald R. Smith, Jr. Scott S. Huisman
Environmental Scientist Sr. Project Manager North Carolina PE #23779
Annual Groundwater Monitoring Report: 2024 June 24, 2024
Casville Mart
Groundwater Incident #23218
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A. SITE INFORMATION
1.Site Identification
Date of Report: May 28, 2024
Facility Identification Number: 0-0000000115
Incident Number: 23218
Site Risk/Priority Rank: High
Site Name: Casville Mart (site)
Site Street Address: 10971 U.S. Highway 158, Ruffin, Caswell County,
North Carolina.
Geographical Data Point: Store Building
Google Earth Pro
Latitude 36.38952 W and Longitude -79.5052 N
A site location map is included as Figure 1 to this report.
2.Information about Contacts Associated with the Underground Storage Tank
(UST) System
UST Owner: Davenport Energy, Inc.
P.O. Box 879, Chatham, VA 24531
Phone: [phone]
UST Operator: Davenport Energy, Inc.
P.O. Box 879, Chatham, VA 24531
Phone: [phone]
Property Owner: Davenport Energy, Inc.
P.O. Box 879, Chatham, VA 24531
Property Occupant: Davenport Energy, Inc.
P.O. Box 879, Chatham, VA 24531
Consultant/Contractor: Apex Companies, LLC
7724 Garland Circle, Roanoke, Virginia 24019
Phone: [phone] Facsimile: 540-563-4921
Analytical Laboratory: Pace National #375
12065 Lebanon Road, Mount Juliet, TN 37122
Phone: [phone]
3.Information about the Release
Date Discovered: October 17, 2000
Estimated Quantity of Release: Unknown
Cause of Release: Unknown
Source of Release: Former diesel fuel UST system
Size and Contents of UST System(s) from which release occurred: See Table
2.

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Groundwater Incident #23218

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EXECUTIVE SUMMARY

On behalf of Davenport Energy, Inc. (Davenport), Maryland Apex Engineering, P.C., an
affiliate of Apex Companies, LLC (Apex), has completed annual Groundwater Monitoring activities
associated with impacted soil and groundwater at the Casville Mart facility located at 10971 US
Highway 158W, Ruffin (Caswell County), North Carolina. The report was prepared in accordance
with North Carolina Department of Environmental Quality (NCDEQ) correspondence requesting
annual groundwater monitoring. Data presented in this report documents current and historical
groundwater gauging and groundwater quality data associated with the release.

Per NCDEQ directives, SEI Environmental, Inc. performed sampling of the on-site supply
well on September 26, 2000 as part of Transient Non-Community Public Water System sampling at
various sites. Results from the supply well sampling yielded methyl tertiary-butyl ether (MTBE) at a
concentration of 44 micrograms per liter (μg/l). Based upon the supply well results Abercrombie Oil
(Abercrombie) contracted Apex to perform site check report activities at the site including the
advancement of 12 soil borings across the site. Soil sample SB-12 yielded a Total Petroleum
Hydrocarbon (TPH) semi-volatile concentration of 112 milligrams per kilogram (mg/kg). The
source of the release was reportedly related to the former diesel fuel underground storage tank (UST)
system, but the estimated quantity of the release was unknown. On October 30, 2000 UST
Statistical Inventory Reconciliation was conducted on all USTs at the site, the results of the tests
confirmed the systems were tight. All information was compiled and reported to the NCDEQ in a
Site Check Report dated May 7, 2001. Apex performed Site Check Report Supplement activities to
confirm the presence or absence of petroleum constituents in site soil. Sixteen (16) additional soil
borings were advanced by Apex in the vicinity of the UST system on January 10, 2001 and June 29,
2001. One subsurface soil sample from each soil boring was retained for laboratory analysis. The
soil samples were analyzed for volatile and semi-volatile TPH. Semi-volatile TPH was detected in
two of the subsurface soil samples at concentrations of 63 mg/kg and 112 mg/kg, which exceeded
the NCDEQ Soil TPH Action Level of 10 mg/kg at the time of the investigation. A Site Check
Report Supplement, dated July 19, 2001, was submitted to NCDEQ.

Based on the results of the Site Checks Reports the NCDEQ Winston-Salem Regional Office
requested that a groundwater monitoring well be installed in the vicinity of the diesel fuel UST and
that a Limited Site Assessment (LSA) be performed. On October 12, 2001, Apex installed the
monitoring well (MW-1). Subsurface soil samples were collected from the monitoring well boring
every five feet until groundwater was encountered at approximately 17 feet below ground surface
(bgs). Two semi-volatile organic compounds were detected in subsurface soil sample MW-1A at a
depth of 3.5 to 5.0 feet. Benzo (a) anthracene and benzo (a) pyrene were detected at concentrations
of 0.454 mg/kg and 0.504 mg/kg, respectively. These results exceeded NCDEQ Soil-to-
Groundwater Maximum Soil Contaminant Concentrations (MSCCs). The water sample collected
from MW-1 contained MTBE and isopropyl ether (IPE) at concentrations of 2.8 μg/l and 1.3 μg/l,
respectively. The LSA Report was submitted to NCDEQ dated February 13, 2002.

In a letter dated March 21, 2002 and in response to the LSA report, the NCDEQ Winston-
Salem Regional Office requested that an additional groundwater monitoring well be installed, and
the assessment be compiled in a Site Check Report Supplemental. The letter also stated that the site
has been classified as high risk and residential. On July 15, 2002, Apex installed a Type II

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Groundwater Incident #23218

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groundwater monitoring well (MW-2) to a depth of 24 feet bgs. Monitoring well MW-2 was
sampled on July 18, 2002. Benzene, IPE, MTBE, 1,2-Dibromoethane (EDB), and lead were
detected above the laboratory method detection limit in the groundwater samples. IPE and MTBE
were detected at concentrations below their respective 2L Groundwater Quality Standards. Benzene,
EDB, and lead were detected at levels exceeding the 2L Groundwater Quality Standards. Benzene
was detected at a concentration of 4.8 μg/l, which exceeds the 2L Groundwater Quality Standard of
1.0 μg/l. EDB was detected at a concentration of 0.026 μg/l, which exceeds the 2L Groundwater
Quality Standard of 0.0004 μg/l. Lead was detected at a concentration of 97 μg/L, which exceeds
the 2L Groundwater Quality Standard of 15 μg/l. The Site Check Report Supplement, dated August
30, 2002, was submitted to NCDEQ.

Per NCDEQ directives, Apex performed additional subsurface investigations at the site on
October 15, 2007 and January 24, 2008 to assess the presence or absence of petroleum compounds in
soil and groundwater. During the investigations, three additional soil borings were drilled which
were converted to monitoring wells MW-3 through MW-5. Soil boring locations were selected
based on the location of the UST basins and dispenser islands, existing monitoring wells, site
topography, supply well locations, and assumed hydrogeologic conditions. The locations were
approved prior to drilling activities by NCDEQ personnel. Apex submitted a Comprehensive Site
Assessment (CSA) associated with the petroleum release at the Casville Mart facility on March 7,
2008. Dissolved-phase petroleum compounds were detected in four of five monitoring wells above
the 2L Groundwater Quality Standards. Based on the findings in the CSA for Casville Mart,
NCDEQ determined annual monitoring needed to be conducted at the site.

In accordance with NCDEQ correspondence dated March 11, 2008, Apex returned to the site
on March 31, 2009 to perform groundwater monitoring activities. Activities included the gauging
and sampling of monitoring wells MW-1 through MW-5. Monitoring well MW-2 yielded benzene
and naphthalene concentrations of 18.0 g/L and 28.2 g/L, respectively, while MW-4 yielded a
benzene concentration of 28.4 g/L. Benzene and naphthalene analytical results from monitoring
wells MW-2 and MW-4 were in exceedance of North Carolina 2L Groundwater Quality Standards.

Per NCDEQ directives, Apex has returned to the site annually to perform additional
groundwater monitoring activities at the site. In March 2010, May 2011, January 2012, March 2013,
January 2014, January 2015, January 2016, February 2017, February 2018, February 2019, and
March 2020. Apex gauged and sampled monitoring wells MW-1 through MW-5. Free-phase
petroleum product has not been detected during annual gauging events. MTBE, benzene, and
naphthalene were detected in groundwater monitoring wells in exceedance of North Carolina 2L
Groundwater Quality Standards during annual monitoring through February 2017. As a result,
NCDEQ requested continued annual monitoring of monitoring wells at the site. North Carolina 2L
Groundwater Quality Standards have not been exceeded at the site since February 2017.

In response to Abercrombie directives, Apex mobilized to the site on January 30, 2012 to
begin removal of one 2,000-gallon diesel fuel UST (UST A4). The UST was located in a UST basin
on the western portion of the facility. The UST was covered with asphalt surface cover. The diesel
fuel dispenser was located approximately ten feet from the UST and was removed by Abercrombie
prior to excavation activities. Apex removed asphalt and uncovered the UST for cleaning. The UST
was removed after cleaning and placed on a flatbed trailer for transportation and disposal. Apex

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observed no pitting or surface rust on the UST. The UST was transported to OmniSource Southeast
in Winston-Salem, North Carolina for disposal. All associated product lines associated with the
UST A4 were also removed from the ground during excavation. In accordance with NCDEQ
guidelines, Apex collected three soil samples from the UST basin, one sample from beneath the
former diesel fuel product line, and one from beneath the former diesel fuel dispenser. Olfactory and
visual senses did not indicate the presence of petroleum compounds in the soil samples. TPH semi-
volatiles were detected in soil sample SS-4, from beneath the former diesel fuel dispenser, at a
concentration of 164 mg/kg but an obvious area of where a leak had occurred was not observed. It
should be noted that UST ID #1, #2, and #3 were removed from service during 1991, no known
releases were reported from the USTs. UST ID # A1, A2, and A3 were installed in the same
common tank basin that was vacated by #1 through #3.

Per NCDEQ directives, Apex researched additional petroleum releases in the area during this
phase. Apex reviewed documents for Incident #23942, the Times #3 property. A release of
petroleum was discovered at the site on September 24, 2001. The cause of the release was
associated with the UST system which includes multiple gasoline and kerosene product lines in a
common basin, however, an estimated quantity from the release was unknown. A Corrective Action
Plan (CAP) was written and dated February 3, 2003. S&ME installed 21 air sparge wells and 12 soil
vapor extraction wells at the subject site in 2002 and 2003. A remediation system associated with
the CAP was placed in operation from February 19, 2004 to June 28, 2016. The systems were both
brought back online during 2019. S&ME predicts the site will hit its 2L standards milestone by
August of 2022.

Per NCDEQ directives, Apex has also returned to the site quarterly or annually since
September 2013 to collect a water sample from the supply well serving the site. Analytical results
have continuously yielded MTBE and Di-isopropyl ether (DIPE) concentrations above laboratory
detection limits; however, analytical results have always remained below their respective 2L
standards, thus no restrictions were recommended for water usage at the site per NCDEQ directives.
Apex updated the receptor survey for the site on February 8, 2021, overall the receptor survey
remained the same from previous phases.

Per NCDEQ directives, on April 6, 2023 Apex conducted 2023 annual sampling at the site.
Free-phase petroleum product was not detected in any of the monitoring wells and has never been
detected by Apex. Groundwater samples were collected from monitoring wells MW-1, MW-3, and
MW-4. Monitoring well MW-2 was not sampled due to an insufficient water column. Apex
personnel observed MW-5 appears to have been closed in place using concrete slurry by a third
party. Apex personnel noted that paving activities appeared to have been conducted recently and the
well closure may be linked to those activities. The paving was not conducted by Davenport and may
be associated with North Carolina Department of Transportation activities. Analytical results from
the April 2023 sampling event continued to be below North Carolina 2L Groundwater Quality
Standards. Apex also collected a sample from the site supply well during this phase. Analytical
results yielded MTBE and DIPE concentrations of 4.65 g/L and 2.20 g/L, respectively, which are
below the 2L Groundwater Quality Standards and consistent with historical sampling events. An
additional sampling event of the site supply well and site monitoring wells is recommended for
Spring 2024.

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Per NCDEQ directives, on March 19, 2024, Apex conducted 2024 annual sampling at the
site. Free-phase petroleum product was not detected in any of the monitoring wells and has never
been detected by Apex. Groundwater samples were collected from monitoring wells MW-1 and
MW-4. Apex personnel observed MW-5 and MW-2 appear to have been closed in place using
concrete slurry by a third party. Apex personnel noted that paving activities appeared to have been
conducted recently and the well closure may be linked to those activities. The paving was not
conducted by Davenport and may be associated with North Carolina Department of Transportation
activities. Apex personnel also observed upon removal of Analytical results from the March 2024
sampling event continued to be below North Carolina 2L Groundwater Quality Standards. Based on
discussions with Davenport, a new replacement supply well was connected to the site building prior
to Apex’s March 2024 site visit. Apex collected a supply well sample after filtration from a sink
faucet in an employee backroom. Analytical results yielded all concentrations below laboratory
detection limits, which are below the 2L Groundwater Quality Standards and consistent with
historical sampling events. An additional sampling event of the site supply well and site monitoring
wells is recommended for Spring 2025.

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Casville Mart
Groundwater Incident #23218

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TABLE OF CONTENTS

1.0 SITE HISTORY AND CHARACTERIZATION .......................................................... 1

2.0 GROUNDWATER MONITORING ............................................................................... 8

2.1 Free Product ............................................................................................................ 8
2.2 Hydrogeology ..........................................................................................................8
2.3 Dissolved-Phase .....................................................................................................10

3.0 GROUNDWATER MONITORING REPORT SUMMARY ......................................18

List of Tables

Table 1. Summary of Soil Sampling Results (Historical)
Table 2. Public and Private Water Supply Information (Receptor Survey)
Table 3. Historical Supply Well Analytical Results
Table 4. Groundwater Elevation Data
Table 5. Groundwater Analytical Data

List of Figures

Figure 1. Site Location Map
Figure 2. Site Plan and Monitoring Well Location Map
Figure 3. Soil Location Map
Figure 4. Receptor Survey Map
Figure 5. Groundwater Elevation Map

List of Appendices

Appendix A Historical Groundwater Elevation Data
Appendix B Laboratory Certificate of Analysis and Chain-of-Custody Records

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Groundwater Incident #23218

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1.0 SITE HISTORY AND CHARACTERIZATION

1.1 Site History- UST/AST System and Other Release Information

UST ID
Number

Current/Last
Contents *

Previous
Contents *

Capacity
(in gallons)

Construction
Details **

Tank
Dimensions
Description
of Associated
Piping and
Pumps

Date Tank
Installed

Status of
UST ***

Was release
associated
with the UST
System?
001 Gasoline Gasoline 3,000 Steel,
Single wall Unknown steel, single
wall piping 01/01/1964 Removed
05/03/91 No
002 Gasoline Gasoline 3,000 Steel,
Single Wall Unknown steel, single
wall piping 01/01/1964 Removed
05/03/91
No

003 Gasoline Gasoline 2,000 Steel,
Single Wall Unknown steel, single
wall piping 01/01/1964 Removed
05/03/91 No
A1 Gasoline Gasoline 6,000 Steel,
Single Wall 96”x192” steel, single
wall piping 05/03/91 In Service No
A2 Gasoline Gasoline 6,000 Steel,
Single Wall 96”x192” steel, single
wall piping 05/03/91 In Service No
A3 Diesel Diesel 6,000 Steel,
Single Wall 96”x192” steel, single
wall piping 05/03/91 In Service No

A4 Diesel Diesel 2,000 Steel,
Single Wall UNK steel, single
wall piping 05/03/91 Removed
01/30/12
Yes

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Casville Mart
Groundwater Incident #23218

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Incident
Number
Material
Released
Date of
Release Description of Release
23218 Diesel 10/17/2000
October 17, 2000 a release of diesel was discovered from the former diesel fuel UST. The
estimated quantity of the release was unknown. October 30, 2000 a UST 2000/P integrity test was
performed. Data indicated that the UST system was tight. Statistical Inventory Reconciliation
(SIR) indicated the system was not leaking.

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1.2 Site History - UST/AST Owner/Operator and Other Responsible Party Information

Revision Date: 04/06/23 Incident Number and Name: 23218 Casville Mart

UST ID Number A1, A2, A3 Facility ID Number 00-0-0000000115
Owner Name (and Contact) Dates of Operation
(mm/dd/yy to mm/dd/yy)
Davenport Energy, Inc. 05/02/17 to Current
Street Address
108 South Main Street
City State Zip Telephone Numbe
Chatham VA 24531 800-971-3835
Operator Name (and Contact) Dates of Operation
(mm/dd/yy to mm/dd/yy)
Rajesh Patel 11/19/19 to Current
Street Address
10971 U.S. Highway 158 Wes
City State Zip Telephone Numbe
Ruffin NC 27326 336-939-3535
Other Incidents Onsite or Commingled/In Close Proximity
Incident
Numbe NA
Date Incident Occurred
NA
Name of Responsible Party
for Other Incident
Date Incident Reported NA
NA Date Incident Closed (i/a) NA
Street Address
NA
City State Zip Telephone Numbe
NA NA NA NA

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UST ID Number 001,002,003,A1, A2, A3,A4 Facility ID Number 00-0-0000000115
Owner Name (and Contact) Dates of Operation
(mm/dd/yy to mm/dd/yy)
Abercrombie Oil Company 01/01/83 to 05/02/17
Street Address
2930 West Main Street
City State Zip Telephone Numbe
Danville VA 24541 1-434-792-8022
Operator Name (and Contact) Dates of Operation
(mm/dd/yy to mm/dd/yy)
Roger Byers 01/01/83 to 05/02/17
Street Address
10971 U.S. Highway 158 Wes
City State Zip Telephone Numbe
Ruffin NC 27326 1-434-792-8022
Other Incidents Onsite or Commingled/In Close Proximity
Incident
Numbe NA Date Incident Occurred NA
Name of Responsible Party
for Other Incident
Date Incident Reported NA
NA Date Incident Closed (i/a) NA
Street Address
NA
City State Zip Telephone Numbe
NA NA NA NA

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Description of Release and Relationship to Historical Releases

According to records received/reviewed by Apex, the release was discovered on
October 17, 2000. The source of the release was reportedly related to the former
diesel fuel UST system, but the estimated quantity of the release is unknown. On
October 30, 2000, a UST 2000/P integrity test was performed by USTMAN
Technologies, Inc. Data from the test indicated that the UST systems were tight. In
addition, data from the March 2000 to February 2001 Statistical Inventory
Reconciliation (SIR) were reviewed. The data from the SIR indicated that the UST
systems were not leaking.

Provide a Brief Description of Site Characteristics

The Casville Mart facility is located at 10971 U.S. Highway 158 Ruffin, Caswell
County, North Carolina (Figure 1). The site consists of an active convenience store
which has gasoline for retail sale. The site is located in a
residential/commercial/agricultural area of Caswell County, North Carolina.
Currently, the site has three 6,000-gallon gasoline underground storage tanks (USTs).
A 2,000-gallon diesel fuel UST and associated product piping and dispenser were
removed from the ground in January 2012.

The site improvements include a retail building, gasoline dispenser island with
canopy, concrete/asphalt access/parking areas, and utilities. The site is bound to the
north by U.S. Highway 158, beyond which is agricultural property. Wooded
property abuts the site to the west. Ashland Road bounds the site to the east.
Commercial and residential properties are located beyond Ashland Road, as well as
to the south of the site. A site plan depicting pertinent features of the site is provided
as Figure 2. Area residences depend on groundwater for potable water purposes.

Summarize Initial Abatement Actions to Date

Based upon the supply well results Abercrombie Oil (Abercrombie) contracted Apex
to perform site check report activities at the site including the advancement of 12 soil
borings across the site. Soil sample SB-12 yielded a Total Petroleum Hydrocarbon
(TPH) semi-volatile concentration of 112 milligrams per kilogram (mg/kg). The
source of the release was reportedly related to the former diesel fuel underground
storage tank (UST) system, but the estimated quantity of the release was unknown.
On October 30, 2000 UST SIR was conducted on all USTs at the site, the results of
the tests confirmed the systems were tight. All information was compiled and
reported to the NCDEQ in a Site Check Report dated May 7, 2001. In order to
further delineate the presence of petroleum constituents in the site soil, 16 soil
borings were advanced by Apex in the vicinity of the UST systems on January 10,
2001 and June 29, 2001. The soil borings were advanced to depths ranging from
approximately three to 14 feet below the ground surface (bgs). One subsurface soil
sample from each soil boring was retained for laboratory analysis. The soil samples
were analyzed for volatile and semi-volatile total petroleum hydrocarbons (TPH) by
USEPA SW-846 Method 8015M as modified by Methods 5030 and 3550,

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respectively. Semi-volatile TPH was detected in two of the subsurface soil samples
at concentrations of 63 milligrams per kilogram (mg/kg) and 112 mg/kg, which
exceeded the NCDEQ Soil TPH Action Level of 10 mg/kg. A Site Check Report,
dated July 19, 2001, was submitted to NCDEQ.

The NCDEQ Winston-Salem Regional Office requested that a groundwater
monitoring well be installed in the vicinity of the diesel fuel UST and that a Limited
Site Assessment (LSA) be performed. On October 12, 2001, Apex installed the
monitoring well (MW-1). Subsurface soil samples were collected from the
monitoring well boring every five feet until groundwater was encountered at
approximately 17 feet bgs. The soil samples were submitted to a North Carolina-
certified laboratory and analyzed for volatile organic compounds (VOCs) by USEPA
Method 8260 including isopropyl ether (IPE), methyl-tertiary-butyl-ether (MTBE),
and xylenes, semi-volatile organic compounds (SVOCs) by USEPA Method 8270,
and volatile petroleum hydrocarbons (VPH) and extractable petroleum hydrocarbons
(EPH) via the Massachusetts Department of Environmental Protection (MADEP)
method.

One groundwater sample was collected from MW-1 for analysis. The groundwater
sample was analyzed for VOCs by USEPA Methods 601 and 602 including IPE,
MTBE, and 1,2-Dibromoethane (EDB), SVOCs by USEPA Method 625 plus the ten
highest peaks, VPH and EPH by MADEP methods, and lead with Standard Method
3030C for preparation.

Seven SVOCs were detected in subsurface soil sample MW-1A at a depth of 3.5 to
5.0 feet bgs. Two of the seven SVOCs were detected at concentrations which exceed
the Soil-to-Groundwater Maximum Soil Contaminant Concentrations (MSCCs).
Benzo(a)anthracene was detected at a concentration of 0.454 mg/kg, which exceeded
the Soil-to-Groundwater MSCC of 0.34 mg/kg. Benzo(a)pyrene was detected at a
concentration of 0.504 mg/kg, which exceeded the Soil-to-Groundwater MSCC of
0.091 mg/kg.

SVOCs, EPH, and VPH were not detected in groundwater samples from the
groundwater monitoring well MW-1. MTBE and IPE were detected at
concentrations of 2.8 micrograms per liter (μg/l) and 1.3 μg/l, respectively, which are
below their respective 2L Groundwater Quality Standards of 200 μg/l and 70 μg/l.
The LSA report, dated February 13, 2002, was submitted to NCDEQ.

In a letter dated March 21, 2002 and in response to the LSA report, the NCDEQ
Winston-Salem Regional Office requested that an additional groundwater monitoring
well be installed, and the assessment be compiled in a Site Check Report
Supplemental. The letter also stated that the site has been classified as high risk and
residential. On July 15, 2002, Apex installed a Type II groundwater monitoring well
(MW-2) to a depth of 24 feet bgs. Monitoring well MW-2 was sampled on July 18,
2002 and the groundwater sample was analyzed for VOCs by USEPA Methods 601
and 602 including IPE, MTBE, and EDB, VPH by the MADEP method, and lead

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with Standard Method 3030C for preparation. An additional groundwater sample
was obtained on August 7, 2002 and analyzed for EDB by USEPA Method 504.1.

The laboratory analysis for VPH indicated no measurable concentrations. Benzene,
IPE, MTBE, EDB and lead were detected above the laboratory method detection
limit in the groundwater samples. IPE and MTBE were detected at concentrations
below their respective 2L Groundwater Quality Standards. Benzene, EDB, and lead
were detected at levels exceeding the 2L Groundwater Quality Standards. Benzene
was detected at a concentration of 4.8 μg/l, which exceeds the 2L Groundwater
Quality Standard of 1.0 μg/l. EDB was detected at a concentration of 0.026 μg/l,
which exceeds the 2L Groundwater Quality Standard of 0.0004 μg/l. Lead was
detected at a concentration of 97 μg/L, which exceeds the 2L Groundwater Quality
Standard of 15 μg/l. The Site Check Report Supplement, dated August 30, 2002, was
submitted to NCDEQ.

Per NCDEQ directives, Apex performed additional subsurface investigations at the
site on October 15, 2007 and January 24, 2008 to assess the presence or absence of
petroleum compounds in soil and groundwater. During the investigations, three
additional soil borings were drilled which were converted to monitoring wells MW-3
through MW-5. Soil boring locations were selected based on the location of the UST
basins and dispenser islands, existing monitoring wells, site topography, supply well
locations, and assumed hydrogeologic conditions. The locations were approved prior
to drilling activities by NCDEQ personnel. Figure 3 is a soil sample location map for
all sample locations available to Apex. Table 1 includes all historical soil analytical
available to Apex.

On October 22, 2007, Apex performed a site reconnaissance to identify the potential
receptors located within a 1,500-foot radius of the subject property. Table 2 is a
summary of the area water supply information, including property owner/occupant,
address, and telephone number at the time of this investigation corresponding to the
locations presented on Figure 4.

Apex submitted a Comprehensive Site Assessment (CSA) associated with the
petroleum release at the Casville Mart facility on March 7, 2008. Dissolved-phase
petroleum compounds were detected in four of five monitoring wells above the 2L
Groundwater Quality Standards. Based on the findings in the CSA for Casville
Mart, NCDEQ determined annual monitoring needed to be conducted at the site.

In accordance with NCDEQ correspondence dated March 11, 2008, Apex returned to
the site on March 31, 2009 to perform groundwater monitoring activities. Activities
included the gauging and sampling of monitoring wells MW-1 through MW-5.
Monitoring well MW-2 yielded benzene and naphthalene concentrations of 18.0
g/L and 28.2 g/L, respectively, while MW-4 yielded a benzene concentration of
28.4 g/L. Benzene and naphthalene analytical results from monitoring wells MW-2
and MW-4 were in exceedance of North Carolina 2L Groundwater Quality
Standards.

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Per NCDEQ directives, Apex has returned to the site annually to perform additional
groundwater monitoring activities at the site. In March 2010, May 2011, January
2012, March 2013, January 2014, January 2015, January 2016, February 2017,
February 2018, February 2019, and March 2020. Apex gauged and sampled
monitoring wells MW-1 through MW-5. Free-phase petroleum product has not been
detected during annual gauging events. MTBE, benzene, and naphthalene were
detected in groundwater monitoring wells in exceedance of North Carolina 2L
Groundwater Quality Standards during annual monitoring through February 2017.
As a result, NCDEQ requested continued annual monitoring of monitoring wells at
the site. North Carolina 2L Groundwater Quality Standards have not been exceeded
at the site since February 2017.

Per NCDEQ directives, Apex has also returned to the site annually since September
2013 to collect a water sample from the supply well serving the site. Analytical
results have continuously yielded MTBE and Di-isopropyl ether (DIPE)
concentrations above laboratory detection limits; however, analytical results have
always remained below their respective 2L standards, thus no restrictions were
recommended for water usage at the site per NCDEQ directives. Historical supply
well analytical results are provided in Table 3.

2.0 ANNUAL GROUNDWATER MONITORING

2.1 Free-Product

Per NCDEQ directives, on March 19, 2024, Apex used a SolinstTM electronic
oil/water interface probe to confirm the presence or absence of free-phase petroleum
product in monitoring wells MW-1 through MW-5. Free-phase petroleum product
was not detected in any of the monitoring wells and has never been detected by
Apex. The monitoring well locations are depicted on Figure 2. Groundwater
elevation data is presented in Table 4. Historical groundwater elevation data is
provided in Appendix A.

2.2 Hydrogeology

Apex is currently unable to map groundwater flow at the site due to only having
access to two monitoring wells. Apex was also only able to produce a geologic
cross section for monitoring well MW-1 to MW-4, due to the obstruction of MW-3.

Annual Groundwater Monitoring Report: 2024 June 24, 2024
Casville Mart
Groundwater Incident #23218

9

Annual Groundwater Monitoring Report: 2024 June 24, 2024
Casville Mart
Groundwater Incident #23218

10
2.3 Dissolved-Phase

On March 19, 2024, Apex collected groundwater samples from monitoring wells
MW-1 and MW-4. Prior to sampling, Apex purged the monitoring wells to remove standing
water and collect a sample representative of aquifer conditions. Monitoring wells MW-2 and
MW-5 appears to have been closed in place using concrete slurry by a third party. Apex
personnel noted that paving activities appeared to have been conducted recently and the well
closure may be linked to those activities. The paving was not conducted by Davenport but
could be associated with North Carolina Department of Transportation activities.
Monitoring wells were purged until a minimum of three well volumes had been displaced.
The groundwater samples were collected from the monitoring wells using dedicated,
disposable high-density polyethylene bailers and were transferred directly into the
appropriate sample containers. Clean, disposable latex gloves were used during all phases of
sample collection. The samples were labeled and stored on ice pending delivery to the
laboratory. The samples were submitted to Pace National in Mt. Juliet, Tennessee for
standard method 6200B with naphthalene per NCDEQ directives. Analytical data yielded
petroleum constituents in monitoring wells MW-1 and MW-4, but results were below North
Carolina 2L Groundwater Quality Standards. It should be noted that North Carolina 2L
Groundwater Quality Standards have not been exceeded at the site since February 2017 for
monitoring wells. The laboratory Certificate of Analysis and chain-of-custody records are
provided in Appendix B. Current groundwater analytical data is provided in Table 5.
Current and historical groundwater analytical data is provided below.

Annual Groundwater Monitoring Report: 2024 June 24, 2024
Casville Mart
Groundwater Incident #23218

11
Current and Historical Groundwater Analytical Results

Parameter Date MW-1 MW-2 MW-3 MW-4 MW-5
2L
Groundwater
Standards
(g/L)
Gross
Contaminant
Levels
(g/L)
MTBE1 (g/L)
10/22/07 8.0 100 <5.0 14.6 NA2
20 20,000
02/07/08 NA NA NA NA <5.0
03/31/09 10.9 8.6 <1.0 28.1 2.5
03/02/10 25.5 2.7 1.1 29.2 1.4
05/03/11 12.2 4.6 1.3 NS3 1.5
01/30/12 3.9 <1.0 1.1 NS 1.4
04/09/12 NS NS NS 22.8 NS
03/04/13 2.2 <1.0 NS 18.0 <1.0
01/09/14 1.1 <1.0 <1.0 26.0 <1.0
01/15/15 <1.0 <1.0 1.1 20.0 <1.0
01/18/16 <1.0 <1.0 <1.0 8.51 <1.0
02/08/17 <1.0 NS <1.0 6.23 <1.0
02/21/18 <1.0 NS <1.0 4.10 NS
02/20/19 <1.0 NS <1.0 3.47 1.15
03/24/20 <1.0 NS <1.0 2.82 1.15
05/13/21 1.24 NS <1.0 2.21 NS
04/06/23 1.49 NS <1.0 1.85 NS
03/19/24 1.38 NS NS 1.69 NS
Di-isopropyl ether
(DIPE) (g/L)
10/22/07 <5.0 427 <5.0 26.5 NA
70 70,000
02/07/08 NA NA NA NA 5.2
03/31/09 <5.0 56.0 <5.0 63.2 <5.0
03/02/10 <5.0 17.2 <5.0 59.5 <5.0
05/03/11 <5.0 17.3 <5.0 NS <5.0
01/30/12 <5.0 <5.0 <5.0 NS <5.0
04/09/12 NS NS NS 31.9 NS
03/04/13 <1.0 1.5 NS 24.0 <1.0
01/09/14 <1.0 <1.0 <1.0 61.0 <1.0
01/15/15 <1.0 <1.0 <1.0 43.0 <1.0
01/18/16 <1.0 <1.0 <1.0 15.1 <1.0
02/08/17 <1.0 NS <1.0 14.2 <1.0

Annual Groundwater Monitoring Report: 2024 June 24, 2024
Casville Mart
Groundwater Incident #23218

12
Current and Historical Groundwater Analytical Results (Cont’d.)

Parameter Date MW-1 MW-2 MW-3 MW-4 MW-5
2L
Groundwater
Standards
(g/L)
Gross
Contaminant
Levels
(g/L)
Di-isopropyl ether
(DIPE) (g/L)
02/21/18 <1.0 NS <1.0 7.92 NS
70 70,000
02/20/19 <1.0 NS <1.0 6.02 <1.0
03/24/20 <1.0 NS <1.0 5.91 <1.0
05/13/21 <1.0 NS <1.0 4.13 NS
04/06/23 <1.0 NS <1.0 3.69 NS
03/19/24 <1.0 NS NS 2.99 NS
Benzene (g/L)

10/22/07 <1.0 77.5 <1.0 5.7 NA
1.0 5,000
02/07/08 NA NA NA NA <1.0
03/31/09 <1.0 18.0 <1.0 28.4 <1.0
03/02/10 <1.0 4.4 <1.0 31.3 <1.0
05/03/11 <1.0 11.0 <1.0 NS <1.0
01/30/12 <1.0 <1.0 <1.0 NS <1.0
04/09/12 NS NS NS 86.8 NS
03/04/13 <1.0 <1.0 NS 49.0 <1.0
01/09/14 <1.0 <1.0 <1.0 96.0 <1.0
01/15/15 <1.0 <1.0 <1.0 61.0 <1.0
01/18/16 <1.0 <1.0 <1.0 22.8 <1.0
02/08/17 <1.0 NS <1.0 1.07 <1.0
02/21/18 <1.0 NS <1.0 <1.0 NS
02/20/19 <1.0 NS <1.0 <1.0 <1.0
03/24/20 <1.0 NS <1.0 <1.0 <1.0
05/13/21 <1.0 NS <1.0 <1.0 NS
04/06/23 <1.0 NS <1.0 <1.0 NS
03/19/24 <1.0 NS NS <1.0 NS
Toluene (g/L)
10/22/07 <1.0 1.7 <1.0 <1.0 NA
600 260,000
02/07/08 NA NA NA NA <1.0
03/31/09 <1.0 <1.0 <1.0 <1.0 <1.0
03/02/10 <1.0 <1.0 <1.0 1.0 <1.0
05/03/11 <1.0 <1.0 <1.0 NS <1.0
01/30/12 <1.0 <1.0 <1.0 NS <1.0
04/09/12 NS NS NS 2.7 NS

Annual Groundwater Monitoring Report: 2024 June 24, 2024
Casville Mart
Groundwater Incident #23218

13
Current and Historical Groundwater Analytical Results (Cont’d.)

Parameter Date MW-1 MW-2 MW-3 MW-4 MW-5
2L
Groundwater
Standards
(g/L)
Gross
Contaminant
Levels
(g/L)
Toluene (g/L)
(Cont’d.)
03/04/13 <5.0 <5.0 NS <5.0 <5.0
600 260,000
01/09/14 <5.0 <5.0 <5.0 <5.0 <5.0
01/15/15 <5.0 <5.0 <5.0 <5.0 <5.0
01/18/16 <5.0 <5.0 <5.0 <5.0 <5.0
02/08/17 <5.0 <5.0 <5.0 <5.0 <5.0
02/21/18 <5.0 NS <5.0 <5.0 NS
02/20/19 <5.0 NS <5.0 <5.0 <5.0
03/24/20 <5.0 NS <5.0 <5.0 <5.0
05/13/21 <1.0 NS <1.0 <1.0 NS
04/06/23 <1.0 NS <1.0 <1.0 NS
03/19/24 <1.0 NS NS <1.0 NS
Ethylbenzene
(g/L)
10/22/07 <1.0 <1.0 <1.0 1.8 NA
600 84,500
02/07/08 NA NA NA NA <1.0
03/31/09 <1.0 <1.0 <1.0 16.4 <1.0
03/02/10 <1.0 <1.0 <1.0 19.9 <1.0
05/03/11 <1.0 <1.0 <1.0 NS <1.0
01/30/12 <1.0 <1.0 <1.0 NS <1.0
04/09/12 NS NS NS 6.7 NS
03/04/13 <1.0 <1.0 NS 30.0 <1.0
01/09/14 <1.0 <1.0 <1.0 57.0 <1.0
01/15/15 <1.0 <1.0 <1.0 50.0 <1.0
01/18/16 <1.0 <1.0 <1.0 23.7 <1.0
02/08/17 <1.0 NS <1.0 <1.0 <1.0
02/21/18 <1.0 NS <1.0 <1.0 NS
02/20/19 <1.0 NS <1.0 <1.0 <1.0
03/24/20 <1.0 NS <1.0 <1.0 <1.0
05/13/21 <1.0 NS <1.0 <1.0 NS
04/06/23 <1.0 NS <1.0 <1.0 NS
03/19/24 <1.0 NS NS <1.0 NS

Annual Groundwater Monitoring Report: 2024 June 24, 2024
Casville Mart
Groundwater Incident #23218

14
Current and Historical Groundwater Analytical Results (Cont’d.)

Parameter Date MW-1 MW-2 MW-3 MW-4 MW-5
2L
Groundwater
Standards
(g/L)
Gross
Contaminant
Levels
(g/L)
Total Xylenes
(g/L)
10/22/07 <3.0 <3.0 <3.0 <3.0 NA
500 85,500
02/07/08 NA NA NA NA 3.0
03/31/09 <3.0 <3.0 <3.0 8.2 <3.0
03/02/10 <3.0 <3.0 <3.0 11.6 <3.0
05/03/11 <3.0 <3.0 <3.0 NS <3.0
01/30/12 <3.0 <3.0 <3.0 NS <3.0
04/09/12 NS NS NS 31.4 NS
03/04/13 <3.0 <3.0 NS 20.8 <3.0
01/09/14 <3.0 <3.0 <3.0 54.0 <3.0
01/15/15 <3.0 <3.0 <3.0 27.2 <3.0
01/18/16 <3.0 <3.0 <3.0 7.69 <3.0
02/08/17 <3.0 NS <3.0 <3.0 <3.0
02/21/18 <3.0 NS <3.0 <3.0 NS
02/20/19 <3.0 NS <3.0 <3.0 <3.0
03/24/20 <3.0 NS <3.0 <3.0 <3.0
05/13/21 <3.0 NS <3.0 <3.0 NS
04/06/23 <3.0 NS <3.0 <3.0 NS
03/19/24 <3.0 NS NS <3.0 NS
Isopropylbenzene
(g/L)
10/22/07 <1.0 15.7 <1.0 1.2 NA
70 25,000
02/07/08 NA NA NA NA <1.0
03/31/09 <1.0 13.5 <1.0 3.3 <1.0
03/02/10 <1.0 8.8 <1.0 3.8 <1.0
05/03/11 <1.0 7.7 <1.0 NS <1.0
01/30/12 <1.0 <1.0 <1.0 NS <1.0
04/09/12 NS NS NS 6.4 NS
03/04/13 <1.0 <1.0 NS 2.4 <1.0
01/09/14 <1.0 <1.0 <1.0 5.8 <1.0
01/15/15 <1.0 <1.0 <1.0 4.5 <1.0
01/18/16 <1.0 <1.0 <1.0 2.75 <1.0
02/08/17 <1.0 NS <1.0 <1.0 <1.0

Annual Groundwater Monitoring Report: 2024 June 24, 2024
Casville Mart
Groundwater Incident #23218

15
Current and Historical Groundwater Analytical Results (Cont’d.)

Parameter Date MW-1 MW-2 MW-3 MW-4 MW-5
2L
Groundwater
Standards
(g/L)
Gross
Contaminant
Levels
(g/L)
Isopropylbenzene
(g/L)
(Cont’d.)
02/21/18 <1.0 NS <1.0 <1.0 NS
70 25,000
02/20/19 <1.0 NS <1.0 <1.0 <1.0
03/24/20 <1.0 NS <1.0 <1.0 <1.0
05/13/21 <1.0 NS <1.0 <1.0 NS
04/06/23 <1.0 NS <1.0 <1.0 NS
03/19/24 <1.0 NS NS <1.0 NS
n-Propylbenzene
(g/L)
10/22/07 <1.0 2.0 <1.0 <1.0 NA
70 30,000
02/07/08 NA NA NA NA <1.0
03/31/09 <1.0 1.2 <1.0 5.2 <1.0
03/02/10 <1.0 <1.0 <1.0 4.8 <1.0
05/03/11 <1.0 <1.0 <1.0 NS <1.0
01/30/12 <1.0 <1.0 <1.0 NS <1.0
04/09/12 NS NS NS 11.1 NS
03/04/13 <1.0 <1.0 NS 3.3 <1.0
01/09/14 <1.0 <1.0 <1.0 7.6 <1.0
01/15/15 <1.0 <1.0 <1.0 7.2 <1.0
01/18/16 <1.0 <1.0 <1.0 4.85 <1.0
02/08/17 <1.0 NS <1.0 <1.0 <1.0
02/21/18 <1.0 NS <1.0 <1.0 NS
02/20/19 <1.0 NS <1.0 <1.0 <1.0
03/24/20 <1.0 NS <1.0 <1.0 <1.0
05/13/21 <1.0 NS <1.0 <1.0 NS
04/06/23 <1.0 NS <1.0 <1.0 NS
03/19/24 <1.0 NS NS <1.0 NS
tert-Butylbenzene
(g/L)
10/22/07 <1.0 <1.0 <1.0 1.2 NA
70 15,000
02/07/08 NA NA NA NA <1.0
03/31/09 <1.0 <1.0 <1.0 2.0 <1.0
03/02/10 <1.0 <1.0 <1.0 1.6 <1.0
05/03/11 <1.0 <1.0 <1.0 NS <1.0
01/30/12 <1.0 <1.0 <1.0 NS <1.0

Annual Groundwater Monitoring Report: 2024 June 24, 2024
Casville Mart
Groundwater Incident #23218

16

Current and Historical Groundwater Analytical Results (Cont’d.)

Parameter Date MW-1 MW-2 MW-3 MW-4 MW-5
2L
Groundwater
Standards
(g/L)
Gross
Contaminant
Levels
(g/L)
tert-Butylbenzene
(g/L)
(Cont’d.)
04/09/12 NS NS NS 2.4 NS
70 15,000
03/04/13 <1.0 <1.0 NS 1.2 <1.0
01/09/14 <1.0 <1.0 <1.0 1.6 <1.0
01/15/15 <1.0 <1.0 <1.0 2.0 <1.0
01/18/16 <1.0 <1.0 <1.0 1.96 <1.0
02/08/17 <1.0 NS <1.0 1.72 <1.0
02/21/18 <1.0 NS <1.0 2.25 NS
02/20/19 <1.0 NS <1.0 1.78 <1.0
03/24/20 <1.0 NS <1.0 1.29 <1.0
05/13/21 <1.0 NS <1.0 1.37 <1.0
04/06/23 <1.0 NS <1.0 <1.0 NS
03/19/24 <1.0 NS NS <1.0 NS
1,2,4-
Trimethylbenzene
(g/L)
10/22/07 <1.0 1.2 <1.0 <1.0 NA
400 28,500
02/07/08 NA NA NA NA <1.0
03/31/09 <1.0 <1.0 <1.0 9.9 <1.0
03/02/10 <1.0 <1.0 <1.0 10.7 <1.0
05/03/11 <1.0 <1.0 <1.0 NS <1.0
01/30/12 <1.0 <1.0 <1.0 NS <1.0
04/09/12 NS NS NS 14.9 NS
03/04/13 <1.0 <1.0 NS 6.7 <1.0
01/09/14 <1.0 <1.0 <1.0 23.0 <1.0
01/15/15 <1.0 <1.0 <1.0 13.0 <1.0
01/18/16 <1.0 <1.0 <1.0 4.24 <1.0
02/08/17 <1.0 NS <1.0 <1.0 <1.0
02/21/18 <1.0 NS <1.0 <1.0 NS
02/20/19 <1.0 NS <1.0 <1.0 <1.0
03/24/20 <1.0 NS <1.0 <1.0 <1.0
05/13/21 <1.0 NS <1.0 <1.0 NS
04/06/23 <1.0 NS <1.0 <1.0 NS
03/19/24 <1.0 NS NS <1.0 NS

Annual Groundwater Monitoring Report: 2024 June 24, 2024
Casville Mart
Groundwater Incident #23218

17

Current and Historical Groundwater Analytical Results (Cont’d.)

Parameter Date MW-1 MW-2 MW-3 MW-4 MW-5
2L
Groundwater
Standards
(g/L)
Gross
Contaminant
Levels
(g/L)
1,3,5-
Trimethylbenzene
(g/L)
04/09/12 NS NS NS 1.7 NS
400 25,000 03/04/13 <1.0 <1.0 NS <1.0 <1.0
01/09/14 <1.0 <1.0 <1.0 1.6 <1.0
01/15/15 <1.0 <1.0 <1.0 1.4 <1.0
sec-Butylbenzene
(g/L)
10/22/07 <1.0 4.7 <1.0 2.1 NA 70 8,500 02/07/08 NA NA NA NA <1.0
Naphthalene(g/L)
03/31/09 <1.0 5.4 <1.0 4.6 <1.0
6.0 6,000
03/02/10 <1.0 3.9 <1.0 3.4 <1.0
01/15/15 <5.0 <5.0 <5.0 47.0 <5.0
01/18/16 <5.0 <5.0 <5.0 12.3 <5.0
02/08/17 <5.0 NS <5.0 <5.0 <5.0
02/21/18 <5.0 NS <5.0 <5.0 NS
02/20/19 <5.0 NS <5.0 <5.0 <5.0
03/24/20 <5.0 NS <5.0 <5.0 <5.0
05/13/21 <5.0 NS <5.0 <5.0 NS
04/06/23 <5.0 NS <5.0 <5.0 NS
03/19/24 <5.0 NS NS <5.0 NS
Isopropyltoluene
(g/L)
01/09/14 <1.0 <1.0 <1.0 1.6 <1.0
25 11,700
01/15/15 <1.0 <1.0 <1.0 1.5 <1.0
01/18/16 <1.0 <1.0 <1.0 1.01 <1.0
02/08/17 <1.0 NS <1.0 <1.0 <1.0
02/21/18 <1.0 NS <1.0 <1.0 NS
02/20/19 <1.0 NS <1.0 <1.0 <1.0
03/24/20 <1.0 NS <1.0 <1.0 <1.0
05/13/21 <1.0 NS <1.0 <1.0 NS
04/06/23 <1.0 NS <1.0 <1.0 NS
03/19/24 <1.0 NS NS <1.0 NS
Tert-butyl alcohol
(g/L)
05/13/21 <5.0 NS <5.0 <5.0 NS 10 10,000 04/06/23 <5.0 NS <5.0 <5.0 NS

Annual Groundwater Monitoring Report: 2024 June 24, 2024
Casville Mart
Groundwater Incident #23218

18

Current and Historical Groundwater Analytical Results (Cont’d.)

Parameter Date MW-1 MW-2 MW-3 MW-4 MW-5
2L
Groundwater
Standards
(g/L)
Gross
Contaminant
Levels
(g/L)
Tert-butyl alcohol
(g/L) 03/19/24 <5.0 NS NS <5.0 NS 10 10,000
Ethanol
(g/L)
05/13/21 <100 NS <100 <100 NS
4,000 4,000,000 04/06/23 <100 NS <100 <100 NS
03/19/24 <100 NS NS <100 NS
Lead (g/L) 10/22/07 NA NA 437 118 112 15 15,000
C9-C10 Aromatic5
(mg/L) 10/22/07 NA NA <0.100 0.309 <0.010 -- --
C5-C8 Aliphatics
(mg/L) 10/22/07 NA NA <0.300 <0.300 0.0097 -- --
C9-C18 Aliphatics
(mg/L) 10/22/07 NA NA <0.240 <0.240 0.039 -- --
Bold = Values that are greater than the 2L Standards.
1 VOCs by U.S. EPA method 6210D/6200B, reported in micrograms per liter (g/L).
2 NA = Not analyzed.
3 NS= Not Sampled

Based on discussions with Davenport, a new replacement supply well was connected to the
site building prior to Apex’s March 2024 site visit. Apex collected a supply well sample
after filtration from a sink faucet in an employee backroom. Clean, disposable latex gloves
were used during all phases of sample collection and handling. The sample was labeled and
stored on ice pending delivery to Pace National for volatile organics analysis via U.S. EPA
SW-846 method 6200B with TBA plus additional oxygenates. Analytical results yielded all
parameters below laboratory detection limits and are therefore below the 2L Groundwater
Quality Standards and consistent with historical sampling events. Current and historical
supply well analytical data is provided in Table 3. The laboratory Certificate of Analysis and
chain-of-custody records are provided in Appendix B

3.0 CONCLUSION AND RECOMMENDATION

Per NCDEQ directives, Apex has completed the 2024 Annual Groundwater Monitoring
Report for the Casville Mart facility. Analytical data yielded petroleum constituents in monitoring
wells MW-1 and MW-4, but results were below North Carolina 2L Groundwater Quality Standards.
Apex recommends an additional sampling event of the site supply well and site monitoring wells be
conducted during Spring 2025. This report is being delivered to Ms. Linda Estkowski of the
NCDEQ on behalf of Davenport Energy, Inc.

TABLES

Table 1: Summary of Soil Sampling Results
Revision Date: 02/05/21 Incident Number and Name: 23218 Casville Mart Facility ID#: 00-0-0000000115
Analytical Method (e.g., VOC by EPA 8260)  VOC
8260
VOC
8260
VOC
8260
VOC
8260
VOC
8260
TPH-
DRO
8015
TPH-
3550/
8015
TPH
5030/
8015
Contaminant of Concern 
Be
n
z
e
n
e

To
l
u
e
n
e

Et
h
y
l
b
e
n
z
e
n
e

Xy
l
e
n
e
s

MT
B
E

TP
H
-
S
e
m
i
-
V
o
l
a
t
i
l
e
s

(D
R
O
)

TP
H
-
V
o
l
a
t
i
l
e
s

TP
H
-
S
e
m
i
-
V
o
l
a
t
i
l
e
s

Sample ID Date
Collected
Source
Area
Sample
Depth
(Feet)
Incident
Phase
(Closure,
20Day,
LSA,
etc.)
SB-1 01/10/01
Dispenser
Island-
North
10-12 Site
Check NA NA NA NA NA NA NA <10
SB-2 01/10/01
Dispenser
Island-
North
10-12 Site
Check NA NA NA NA NA NA NA <10
SB-3 01/10/01
UST
Basin-
East
10-12 Site
Check NA NA NA NA NA NA NA <10
SB-4 01/10/01
UST
Basin-
East
10-12 Site
Check NA NA NA NA NA NA NA <10
SB-5 01/10/01
UST
Basin-
East
10-12 Site
Check NA NA NA NA NA NA NA <10
SB-6 01/10/01
Dispenser
Island-
South
10-12 Site
Check NA NA NA NA NA NA NA <10
SB-7 01/10/01
Dispenser
Island-
South
10-12 Site
Check NA NA NA NA NA NA NA <10
SB-8 01/10/01
Dispenser
Island-
South
10-12 Site
Check NA NA NA NA NA NA NA <10
SB-9 01/10/01
Dispenser
Island-
South
10-12 Site
Check NA NA NA NA NA NA NA <10
SB-10 01/10/01
Diesel
UST
Basin -
Wes
10-12 Site
Check NA NA NA NA NA NA <40 <10

Table 1: Summary of Soil Sampling Results (Cont’d)
Revision Date: 02/05/21 Incident Number and Name: 23218 Casville Mart Facility ID#: 00-0-0000000115
Analytical Method (e.g., VOC by EPA 8260)  VOC
8260
VOC
8260
VOC
8260
VOC
8260
VOC
8260
TPH-
DRO
8015
TPH-
3550/
8015
TPH
5030/
8015
Contaminant of Concern 
Be
n
z
e
n
e

To
l
u
e
n
e

Et
h
y
l
b
e
n
z
e
n
e

Xy
l
e
n
e
s

MT
B
E

TP
H
-
S
e
m
i
-
V
o
l
a
t
i
l
e
s

(D
R
O
)

TP
H
-
V
o
l
a
t
i
l
e
s

TP
H
-
S
e
m
i
-
V
o
l
a
t
i
l
e
s

Sample ID Date
Collected
Source
Area
Sample
Depth
(Feet)
Incident
Phase
(Closure,
20Day,
LSA,
etc.)
SB-11 01/10/01
Diesel
UST
Basin -
Southeast
10-12 Site
Check NA NA NA NA NA NA <40 <10
SB-12 01/10/01
Diesel
Dispenser
-South
10-12 Site
Check NA NA NA NA NA NA 112 <10
SS-1 01/03/12 Tank Pit 8.0 Site
Check NA NA NA NA NA <10 NA NA
SS-2 01/03/12 Tank Pit 8.0 Tank
Closure NA NA NA NA NA <10 NA NA
SS-3 01/03/12 Tank Pit 8.0 Tank
Closure NA NA NA NA NA <10 NA NA
SS-4 05/15/12 Dispenser 2.5 Tank
Closure NA NA NA NA NA 164 NA NA
SS-5 05/15/12 Product
Line 2.0 Tank
Closure NA NA NA NA NA <10 NA NA
MW-1A 10/12/01 MW-1 3.5-5.0 LSA BQL BQL BQL BQL BQL NA NA NA
MW-1B 10/12/01 MW-1 8.5-10.0 LSA BQL BQL BQL BQL BQL NA NA NA
MW-1C 10/12/01 MW-1 13.5-
15.0 LSA BQL BQL BQL BQL BQL NA NA NA
NA NA MW-2 NA NA NA NA NA NA NA NA NA NA
SB-3-5 10/15/07 MW-3 24-26 CSA <0.05 <0.05 <0.05 <0.05 <0.05 NA NA NA

Table 1: Summary of Soil Sampling Results (Cont’d.)
Revision Date: 02/05/21 Incident Number and Name: 23218 Casville Mart Facility ID#: 00-0-0000000115
Analytical Method (e.g., VOC by EPA 8260)  VOC
8260
VOC
8260
VOC
8260
VOC
8260
VOC
8260
TPH-
DRO
8015
TPH-
3550/
8015
TPH
5030/
8015
Contaminant of Concern 
Be
n
z
e
n
e

To
l
u
e
n
e

Et
h
y
l
b
e
n
z
e
n
e

Xy
l
e
n
e
s

MT
B
E

TP
H
-
S
e
m
i
-
V
o
l
a
t
i
l
e
s

(D
R
O
)

TP
H
-
V
o
l
a
t
i
l
e
s

TP
H
-

S
e
m
i

-
V
o
l
a
t
i
l
e
s

Sample ID Date
Collected
Source
Area
Sample
Depth
(Feet)
Incident
Phase
(Closure,
20Day,
LSA,
etc.)
SB-4-5 10/15/07 MW-4 24-26 CSA <0.05 <0.05 <0.05 NA <0.05 NA NA NA
NA NA MW-5 NA CSA NA NA NA NA NA NA NA NA
Minimum Reporting Limit (mg/kg) 0.05 0.05 0.05 0.05 0.05 NA NA NA
Soil to groundwater MSCC (mg/kg) 0.0056 4.3 4.9 4.6 0.091 NA NA NA
Residential MSCC (mg/kg) 18.0 1200 1,560 3,129 350 NA NA NA
Industrial/Commercial MSCC (mg/kg) 164 32,000 40,000 81,760 3,100 NA NA NA

Table 2: Public and Private Water Supply Well and Other Receptor Information
Receptor Survey Revised Date: 02/08/2021 Incident Number and Name: 23218 Facility ID#: 00-0-0000000115
Well # Well Owner/ User
(indicate which) Address Phone
Number
Latitude/
Longitude
*
(decimal
degrees)
Well Use
Well
Depth (ft
BGS) **
Type of
Well
Well
Casing
Depth (ft.
BGS)
Well
Screen
Interval
(x to y ft.
BGS)
Distance
from
source
area of
release
(ft.)
Up

o
r

do
w
n
g
r
a
d
i
e
n
t

(U
/
D
)

A Davenport Energy,
Inc.
10971 U.S.
Highway 158 434-432-0251 Unknown Domestic Unknown Unknown Unknown Unknown Site Site
B Mary Coleman
Harrison 64 Ashland Road Unknown Unknown Domestic Unknown Unknown Unknown Unknown 280 feet
south U
C Southern Net, Inc. 142 Ashland Road Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown U
D Christine Williamson 176 Ashland Road 336-939-7372 Unknown Unknown Unknown Unknown Unknown Unknown 900 feet
south U
E Bessie Williamson 212 Ashland Road Unknown Unknown Unknown Unknown Unknown Unknown Unknown 1,050 feet
south U
F Earl E & Josie W
Brown 254 Ashland Road Unknown Unknown Unknown Unknown Unknown Unknown Unknown 1,250 feet
south U
G James A & Mary
Hodges
181,211,233 & 249
Ashland Road 336-694-4968 Unknown Unknown 200 feet Unknown Unknown Unknown 1,000 feet
southeast U
H John Daniel Hawkins 133 Ashland Road Unknown Unknown Unknown Unknown Unknown Unknown Unknown 675 feet
southeast U
I Lottie Robertson/Jesse
Robertson 111 Ashland Road Unknown Unknown Unknown Unknown Unknown Unknown Unknown 525 feet
southeast U
J Richard D &
Stephanie Johnson 85 Ashland Road Unknown Unknown Unknown Unknown Unknown Unknown Unknown 450 feet
southeast U
K Erle Scott & Betty C.
Lillard 29 Ashland Road Unknown Unknown Unknown Unknown Unknown Unknown Unknown 250 feet
eas U

L

Kanchanben Patel 10907/10921 U.S.
Hwy 158 Unknown Unknown Unknown Unknown Unknown Unknown Unknown 300 feet
east U
M J Cecil & Thyra
Smith
10891/10841 U.S.
Hwy 158 Unknown Unknown Unknown Unknown Unknown Unknown Unknown 575 feet
southeast U
N Lee W & Ann Hodges 10779 U.S. Hwy
158 Unknown Unknown Unknown Unknown Unknown Unknown Unknown 925 feet
southeast U
O Abdul Salan
Muhammed Alashmeli
10942 Park Springs
Road 336-939-3535 Unknown Unknown 180 Unknown Unknown Unknown 300 feet
northeast U
P J Cecil & Thyra
Smith
10924-A, 10924B,
10902, 10850,10724
U.S. Hwy 158
Unknown Unknown Unknown Unknown Unknown Unknown Unknown 700 feet
northeast U
Q Casville Volunteer
Fire Department
10886 U.S. Hwy
158 Unknown Unknown Unknown Unknown Unknown Unknown Unknown 500 feet
eas U

Table 3.

Current and Historical Supply Well Analytical Data

Sample ID Sample
Date
MTBE1
(g/L)
Benzene
(g/L)
Toluene
(g/L)
Ethyl-
benzene
(g/L)
Xylenes
(g/L)
Naph-
thalene
(g/L)
Di-
Isopropyl
ether
(g/L)
Tert-Butyl
alcohol
(g/L)
Ethanol
(g/L)
SW-Casville
Mart
09/26/00 44.0 <1.0 <1.0 <1.0 <2.0 <10 NA NA NA
09/27/13 13.0 <1.0 <5.0 <1.0 <3.0 <5.0 7.4 NA NA
01/09/14 13.0 <1.0 <5.0 <1.0 <3.0 <5.0 7.3 NA NA
05/08/14 12.0 <1.0 <5.0 <1.0 <3.0 <5.0 7.8 NA NA
08/14/14 13.0 <1.0 <5.0 <1.0 <3.0 <5.0 5.9 NA NA
12/02/14 12.0 <1.0 <5.0 <1.0 <3.0 <5.0 5.0 NA NA
01/15/15 15.0 <1.0 <5.0 <1.0 <3.0 <5.0 7.8 NA NA
06/08/15 13.0 <1.0 <5.0 <1.0 <3.0 <5.0 7.3 NA NA
07/28/15 9.5 <1.0 <5.0 <1.0 <3.0 <5.0 3.2 NA NA
11/15/15 10.8 <1.0 <5.0 <1.0 <3.0 <5.0 3.95 NA NA
01/18/16 12.2 <1.0 <5.0 <1.0 <3.0 <5.0 5.49 NA NA
04/21/16 12.3 <1.0 <5.0 <1.0 <3.0 <5.0 5.21 NA NA
08/29/16 10.7 <1.0 <5.0 <1.0 <3.0 <5.0 4.55 NA NA
11/08/16 10.3 <1.0 <5.0 <1.0 <3.0 <5.0 3.41 NA NA
02/08/17 11.0 <1.0 <5.0 <1.0 <3.0 <5.0 5.90 NA NA
05/22/17 8.35 <1.0 <5.0 <1.0 <3.0 <5.0 3.87 NA NA
09/07/17 <10.0 <10.0 <10.0 <10.0 <30.0 <50.0 <10.0 NA NA

Table 3. (Cont’d.)

Current and Historical Supply Well Analytical Data

Sample ID Sample
Date
MTBE1
(g/L)
Benzene
(g/L)
Toluene
(g/L)
Ethyl-
benzene
(g/L)
Xylenes
(g/L)
Naph-
thalene
(g/L)
Di-
Isopropyl
ether
(g/L)
Tert-Butyl
alcohol
(g/L)
Ethanol
(g/L)
SW-Casville
Mart
11/29/17 9.81 <1.0 <5.0 <1.0 <3.0 <5.0 4.33 NA NA
02/21/18 <1.0 <1.0 <5.0 <1.0 <3.0 <5.0 <1.0 NA NA
07/12/18 8.63 <1.0 <5.0 <1.0 <3.0 <5.0 3.07 NA NA
08/16/18 7.80 <1.0 <5.0 <1.0 <3.0 <5.0 3.62 NA NA
01/03/19 11.2 <1.0 <5.0 <1.0 <3.0 <5.0 4.12 NA NA
02/20/19 8.49 <1.0 <5.0 <1.0 <3.0 <5.0 3.64 NA NA
03/24/20 6.89 <1.0 <5.0 <1.0 <3.0 <5.0 2.97 NA NA
05/13/21 6.28 <1.0 <5.0 <1.0 <3.0 <5.0 1.94 11.8 <100
04/06/23 4.65 <1.0 <1.0 <1.0 <3.0 <5.0 2.20 <5.00 <100
03/19/24 <1.0 <1.0 <1.0 <1.0 <3.0 <5.0 <1.0 <5.0 <100
2L Groundwater
Standards
((g/L)
20 1.0 600 600 500 6.0 70 10 4,000

Table 4.

Groundwater Elevation Data

Well
Identification
Well
Install
Date
Date
Well
Diameter
(in)
Relative Top
of Casing
Elevation1
(feet)
Depth to
Product
(feet)
Depth to
Groundwater
(feet)
Product
Thickness
(feet)
Well Screen
Interval
(feet)
Groundwater
Elevation
(feet)
MW-1 10/12/01 03/19/24 2 682.90 NA2 16.34 NA 10-20 666.56
MW-2 07/15/02 03/19/24 2 683.72 NA Obstructed NA 9-24 NA
MW-3 10/15/07 03/19/24 2 685.44 NA Obstructed NA 5-25 NA
MW-4 10/15/07 03/19/24 2 684.90 NA 18.62 NA 5-25 666.28
MW-5 01/24/08 03/19/24 2 682.28 NA NA NA 10-30 NA
1 Elevations measured by Apex Companies, LLC, relative to arbitrary site datum from USGS 7.5-Minute Series Topographic Map of the Ruffin, North Carolina Quadrangle (1994) of 690.00 ft.
2 NA = Not applicable.

Table 5.

Groundwater Analytical Data
March 19, 2024

Parameter MW-1 MW-2 MW-3 MW-4 MW-5
SW-
Casville
Mart
2L
Groundwater
Standards
(g/L)
Gross
Contaminant
Levels
(g/L)
MTBE1 (g/L) 1.38 NS3 NS 1.69 NS3 <1.0 20 20,000
Benzene (g/L) <1.0 NS NS <1.0 NS <1.0 1.0 5,000
Toluene (g/L) <1.0 NS NS <1.0 NS <1.0 600 260,000
Ethylbenzene (g/L) <1.0 NS NS <1.0 NS <1.0 600 84,500
Total Xylenes (g/L) <3.0 NS NS <3.0 NS <3.0 500 85,500
Isopropylbenzene (g/L) <1.0 NS NS <1.0 NS <1.0 70 25,000
Tert-Butyl alcohol (g/L) <5.0 NS NS <5.0 NS <5.0 10 10,000
n-Propylbenzene (g/L) <1.0 NS NS <1.0 NS <1.0 70 30,000
tert-Butylbenzene (g/L) <1.0 NS NS <1.0 NS <1.0 70 15,000
1,2,4-Trimethylbenzene
(g/L) <1.0 NS NS <1.0 NS <1.0 400 28,500
1,3,5-Trimethylbenzene
(g/L) <1.0 NS NS <1.0 NS <1.0 400 25,000
sec-Butylbenzene (g/L) <1.0 NS NS <1.0 NS <1.0 70 8,500
Isopropyltoluene (g/L) <1.0 NS NS <1.0 NS <1.0 25 11,700
Di-isopropyl ether
(DIPE) (g/L) <1.0 NS NS 2.99 NS <1.0 70 70,000
Naphthalene (g/L) <5.0 NS NS <5.0 NS <5.0 6.0 6,000
Ethanol (g/L) <100 NS NS <100 NS <100 4,000 4,000,000
1,2-Dibromoethane2
(EDB) (g/L) <1.0 NS NS <1.0 NS <1.0 0.02 50
Bold = Values that are greater than the 2L Standards.
1 VOCs by U.S. EPA method 6200B, reported in micrograms per liter (g/L).
2 EDB by U.S. EPA method 504.1, reported in micrograms per liter (g/L).
3 NS=Not Sampled.

FIGURES

FIGURE 1
Site Location Map Groundwater Monitoring Report Casville Mart

7724 Garland Circle Roanoke, VA 24019 Telephone: [phone]

RUFFIN, NORTH CAROLINA Source: U.S.G.S. Topographic Map of the Ruffin Quadrangle, North Carolina, 7.5 Minute Series (1994) Scale: 1:24,000 Contour Interval: 20 Feet Vertical Datum: National Geodetic Vertical Datum 1929 Horizontal Datum: North American Datum1927
Project: Groundwater Monitoring Report
Latitude: 036O 23’ 21.57” N Longitude: -079O 30’ 19.09” W
Client: Davenport Energy
Apex Job #:
Date: May 2024
SITE
www.apexcos.com
MW-2
MW-4
MW-3
U
U
U
U
Asphalt Asphalt
Former Diesel UST
Underground Communication
U Utility
Concrete Area/Tank Basin
Grassy Area
Legend
Monitoring Well
Fence
Dispenser
MW-5
Grass
Air
Companies, LLC7724 Garland CircleRoanoke, Virginia 24019(540) 563-4920
Supply Well
SW- Casville Mart
Common UST Basinfor 001,002,003 removed from service in 1991.
Former 001 Location
Former 002 Location
Former 003 Location
Former A4 Product Line
MW-1
A4
REV
0
Site MapCasville Mart10971 US Highway 158 WRuffin, Caswell County, North Carolina
DRAWING NUMBER
FIGURE No. 2BY DATEREV
DR.: DRS May 2024
CK.:
APP'D.:
SCALE: 1 inch = 40 feet
APEX JOB NO.: 24005279
GroundwaterMonitoringReport
Incident#23218
N
Shed
Casville Mart
Gate
Storage Area
CJ's Cafe
U.S. HIGHWAY 158
ASHLAND ROAD
W E
A3
A2
A1
Property Boundary
www.apexcos.com
MW-2
MW-4
SS-1
MW-3
U
U
U
U
Asphalt Asphalt
Former Diesel UST
Underground Communication
U Utility
Concrete Area/Tank Basin
Grassy Area
Legend
Monitoring Well
Fence
Dispenser
MW-5
Grass
Air
Companies, LLC7744 Garland CircleRoanoke, Virginia 24019(540) 563-4920
SS-2
SS-3
MW-1 SS-4
SS-5 SB-3-524-26 Feet
SB-4-524-26 Feet
SB-2SB-1
SB-5
SB-4
SB-3
SB-6SB-7
SB-8
SB-9
SB-10SB-11
SB-12
MW-1A (3.5-5.0 ft)MW-1B (8.5-10.0 ft)MW-1C (13.5-15.0 ft)
REV
0
Soil Sample Location MapCasville Mart10971 US Highway 158 WRuffin, Caswell County, North Carolina
DRAWING NUMBER
FIGURE No. 3BY DATEREV
DR.: DRS May 2024
CK.:
APP'D.:
SCALE: 1 inch = 40 feet
APEX JOB NO.: 24005279
GroundwaterMonitoring Report
Incident #23218
N
Shed
Casville Mart
Gate
Storage Area
CJ's Cafe
U.S. HIGHWAY 158
ASHLAND ROAD
W E
www.apexcos.com
7724 Garland CircleRoanoke, Virginia 24019(540) 563 4920

REV
1
Site Map - Receptor SurveyCasville Mart10971 US Highway 158WRuffin, Virginia
DRAWING TITLE
DRAWING NUMBER
FIGURE No. 4BY DATEREV
DR.: DRS May 2024
CK.:
APP'D.:
SCALE:
APEX PROJ. NO.: 24005279
Groundwater
Monitoring
Report
Incident # 23218
A
B
C
D
G E
F
A
K
J
I
H
L
M
N
N
P
P
P Q

APPENDIX A

Historical Groundwater
Elevation Data

Historical Groundwater Elevation Data

Well
Identification Date
Relative
Top of
Casing
Elevation1
(feet)
Depth to
Product
(feet)
Depth to
Groundwater
(feet)
Product
Thickness
(feet)
Well
Screen
Interval
(feet)
Groundwater
Elevation (feet)
MW-1
10/22/07
682.90
NA2 17.24 NA
10-20
665.66
03/31/09 NA 16.87 NA 666.03
03/02/10 NA 14.14 NA 668.76
05/03/11 NA 14.74 NA 668.16
01/30/12 NA 16.50 NA 666.40
03/04/13 NA 18.92 NA 663.98
01/09/14 NA 17.36 NA 665.54
01/15/15 NA 16.10 NA 666.80
01/18/16 NA 14.21 NA 668.69
02/08/17 NA 15.54 NA 667.36
02/21/18 NA 16.70 NA 666.20
02/20/19 NA 11.07 NA 671.83
03/24/20 NA 12.44 NA 670.46
05/13/21 NA 10.40 NA 672.50
04/06/23 NA 14.84 NA 668.06
03/19/24 NA 16.34 NA 666.56
MW-2
10/22/07
683.72
NA 18.03 NA
9-24
665.69
03/31/09 NA 18.01 NA 665.71
03/02/10 NA 15.32 NA 668.40
05/03/11 NA 15.84 NA 667.88
01/30/12 NA 17.66 NA 666.06
03/04/13 NA 20.04 NA 663.68
01/09/14 NA 17.24 NA 666.48
01/15/15 NA 15.83 NA 667.89
01/18/16 NA 10.22 NA 673.50
02/08/17 NA Dry NA NA
02/21/18 NA Dry NA NA
02/20/19 NA Dry NA NA
03/24/20 NA Dry NA NA
05/13/21 NA Dry NA NA

Historical Groundwater Elevation Data (Cont’d.)

Well
Identification Date
Relative
Top of
Casing
Elevation
(feet)
Depth to
Product
(feet)
Depth to
Groundwater
(feet)
Product
Thickness
(feet)
Well
Screen
Interval
(feet)
Groundwater
Elevation (feet)
MW-3
10/22/07
685.44
NA 19.70 NA
5-25
665.74
03/31/09 NA 19.97 NA 665.47
03/02/10 NA 17.54 NA 667.90
05/03/11 NA 18.00 NA 667.44
01/30/12 NA 19.63 NA 665.81
03/04/13 NA Dry NA NA
01/09/14 NA 20.72 NA 664.72
01/15/15 NA 19.34 NA 666.10
01/18/16 NA 17.64 NA 667.80
02/08/17 NA 18.60 NA 666.84
02/21/18 NA 20.65 NA 664.79
02/20/19 NA 14.55 NA 670.89
03/24/20 NA 15.49 NA 669.95
05/13/21 NA 13.26 NA 672.18
04/06/23 NA 18.04 NA 667.40
03/19/24 NA Obstructed NA NA
MW-4
10/22/07
684.90
NA 19.18 NA
5-25
665.72
03/31/09 NA 19.17 NA 665.73
03/02/10 NA 16.40 NA 668.50
05/03/11 NA NG3 NA NA
01/30/12 NA NG NA NA
04/09/12 NA 18.65 NA 666.25
03/04/13 NA 21.21 NA 663.69
01/09/14 NA 19.81 NA 665.09
01/15/15 NA 18.35 NA 666.55
01/18/16 NA 16.60 NA 668.30
02/08/17 NA 17.72 NA 667.18
02/21/18 NA 18.99 NA 665.91
02/20/19 NA 13.45 NA 671.45

Historical Groundwater Elevation Data (Cont’d.)

Well
Identification Date
Relative
Top of
Casing
Elevation
(feet)
Depth to
Product
(feet)
Depth to
Groundwater
(feet)
Product
Thickness
(feet)
Well
Screen
Interval
(feet)
Groundwater
Elevation (feet)
MW-4
(Cont’d.)
03/24/20
684.90
NA 14.60 NA
5-25
670.30
05/13/21 NA 12.45 NA 672.45
04/06/23 NA 17.23 NA 667.67
03/19/24 NA 18.62 NA 666.28
MW-5
02/07/08
682.28
NA 17.12 NA
10-30
665.16
03/31/09 NA 16.50 NA 665.78
03/02/10 NA 13.54 NA 668.74
05/03/11 NA 14.35 NA 667.93
01/30/12 NA 16.12 NA 666.16
03/04/13 NA 18.57 NA 663.71
01/09/14 NA 17.14 NA 665.14
01/15/15 NA 15.69 NA 666.59
01/18/16 NA 13.77 NA 668.51
02/08/17 NA 15.14 NA 667.14
02/21/18 NA 16.10 NA 666.18
02/20/19 NA 10.90 NA 671.38
03/24/20 NA 12.03 NA 670.25
05/13/21 NA NA NA NA
1 Elevations measured by Apex Companies, LLC, relative to arbitrary site datum from USGS 7.5-Minute Series Topographic Map of the Ruffin, North
Carolina Quadrangle (1994) of 690.00 ft.
2 NA = Not applicable.
3 NG = Not gauged.

APPENDIX B

Laboratory Certificate of Analysis and
Chain-of-Custody Records

ANALYTICAL REPORT
March 30, 2024
Apex Companies, LLC - Roanoke, VA
Sample Delivery Group:L1717113
Samples Received:03/20/2024
Project Number:768566-001
Description:Casville Mart
Report To:Donald Smith
7724 Garland Circle
Roanoke, VA 24019
Entire Report Reviewed By:
March 30, 2024
[Preliminary Report]
Jeff Carr
Project Manager
Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be
reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace
Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and
ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided,
and as the samples are received.
Pace Analytical National
12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 www.pacenational.com
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 14:59 1 of 20
March 30, 2024
Jeff Carr
Project Manager
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 16:39 1 of 20
TABLE OF CONTENTS
Cp: Cover Page 1
Tc: Table of Contents 2
Ss: Sample Summary 3
Cn: Case Narrative 4
Sr: Sample Results 5
MW-1 L1717113-01 5
MW-4 L1717113-02 7
SW-CASVILLE MART L1717113-03 9
TRIP BLANK L1717113-04 11
Qc: Quality Control Summary 13
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 13
Gl: Glossary of Terms 18
Al: Accreditations & Locations 19
Sc: Sample Chain of Custody 20
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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SAMPLE SUMMARY
Collected by Collected date/time Received date/time
MW-1 L1717113-01 GW Brendan Maloney 03/19/24 11:45 03/20/24 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2254310 1 03/26/24 17:28 03/26/24 17:28 ACG Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2256050 1 03/29/24 17:47 03/29/24 17:47 ADM Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-4 L1717113-02 GW Brendan Maloney 03/19/24 12:00 03/20/24 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2254310 1 03/26/24 17:49 03/26/24 17:49 ACG Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2256050 1 03/29/24 18:08 03/29/24 18:08 ADM Mt. Juliet, TN
Collected by Collected date/time Received date/time
SW-CASVILLE MART L1717113-03 GW Brendan Maloney 03/19/24 12:15 03/20/24 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2254310 1 03/26/24 18:09 03/26/24 18:09 ACG Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2256050 1 03/29/24 18:29 03/29/24 18:29 ADM Mt. Juliet, TN
Collected by Collected date/time Received date/time
TRIP BLANK L1717113-04 GW Brendan Maloney 03/19/24 00:00 03/20/24 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2254310 1 03/26/24 16:47 03/26/24 16:47 ACG Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2256050 1 03/29/24 16:45 03/29/24 16:45 ADM Mt. Juliet, TN
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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CASE NARRATIVE
All sample aliquots were received at the correct temperature, in the proper containers, with the
appropriate preservatives, and within method specified holding times, unless qualified or notated within
the report. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples
have been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control
are within established criteria except where addressed in this case narrative, a non-conformance form
or properly qualified within the sample results. By my digital signature below, I affirm to the best of my
knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the
quality of the data have been identified by the laboratory, and no information or data have been
knowingly withheld that would affect the quality of the data.
[Preliminary Report]
Jeff Carr
Project Manager
Sample Delivery Group (SDG) Narrative
Analyzed from headspace vial.
Lab Sample ID Project Sample ID Method
L1717113-04 TRIP BLANK 6200B-2011
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 14:59 4 of 20
Jeff Carr
Project Manager
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Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 16:39 4 of 20
SAMPLE RESULTS - 01
L1717113
MW-1
Collected date/time: 03/19/24 11:45
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Acetone ND 50.0 1 03/26/2024 17:28 WG2254310
Acrylonitrile ND 10.0 1 03/26/2024 17:28 WG2254310
t-Amyl Alcohol ND 50.0 1 03/26/2024 17:28 WG2254310
tert-Butyl alcohol ND 5.00 1 03/26/2024 17:28 WG2254310
Benzene ND 1.00 1 03/26/2024 17:28 WG2254310
Bromobenzene ND 1.00 1 03/26/2024 17:28 WG2254310
Bromodichloromethane ND 1.00 1 03/26/2024 17:28 WG2254310
Bromoform ND 1.00 1 03/26/2024 17:28 WG2254310
Bromomethane ND 5.00 1 03/26/2024 17:28 WG2254310
n-Butylbenzene ND 1.00 1 03/26/2024 17:28 WG2254310
sec-Butylbenzene ND 1.00 1 03/26/2024 17:28 WG2254310
tert-Butylbenzene ND 1.00 1 03/26/2024 17:28 WG2254310
Carbon tetrachloride ND 1.00 1 03/26/2024 17:28 WG2254310
Chlorobenzene ND 1.00 1 03/26/2024 17:28 WG2254310
Chlorodibromomethane ND 1.00 1 03/26/2024 17:28 WG2254310
Chloroethane ND 5.00 1 03/26/2024 17:28 WG2254310
Chloroform ND 5.00 1 03/26/2024 17:28 WG2254310
Chloromethane ND 2.50 1 03/26/2024 17:28 WG2254310
2-Chlorotoluene ND 1.00 1 03/26/2024 17:28 WG2254310
4-Chlorotoluene ND 1.00 1 03/26/2024 17:28 WG2254310
1,2-Dibromo-3-Chloropropane ND 5.00 1 03/26/2024 17:28 WG2254310
1,2-Dibromoethane ND 1.00 1 03/26/2024 17:28 WG2254310
Dibromomethane ND 1.00 1 03/26/2024 17:28 WG2254310
1,2-Dichlorobenzene ND 1.00 1 03/26/2024 17:28 WG2254310
1,3-Dichlorobenzene ND 1.00 1 03/26/2024 17:28 WG2254310
1,4-Dichlorobenzene ND 1.00 1 03/26/2024 17:28 WG2254310
Dichlorodifluoromethane ND 5.00 1 03/26/2024 17:28 WG2254310
1,1-Dichloroethane ND 1.00 1 03/26/2024 17:28 WG2254310
1,2-Dichloroethane ND 1.00 1 03/26/2024 17:28 WG2254310
1,1-Dichloroethene ND 1.00 1 03/26/2024 17:28 WG2254310
cis-1,2-Dichloroethene ND 1.00 1 03/26/2024 17:28 WG2254310
trans-1,2-Dichloroethene ND 1.00 1 03/26/2024 17:28 WG2254310
1,2-Dichloropropane ND 1.00 1 03/26/2024 17:28 WG2254310
1,1-Dichloropropene ND 1.00 1 03/26/2024 17:28 WG2254310
1,3-Dichloropropane ND 1.00 1 03/26/2024 17:28 WG2254310
2,2-Dichloropropane ND 1.00 1 03/26/2024 17:28 WG2254310
Di-isopropyl ether ND 1.00 1 03/26/2024 17:28 WG2254310
Ethylbenzene ND 1.00 1 03/26/2024 17:28 WG2254310
Ethyl tert-butyl ether ND 1.00 1 03/26/2024 17:28 WG2254310
Hexachloro-1,3-butadiene ND 1.00 1 03/26/2024 17:28 WG2254310
Isopropylbenzene ND 1.00 1 03/26/2024 17:28 WG2254310
p-Isopropyltoluene ND 1.00 1 03/26/2024 17:28 WG2254310
2-Butanone (MEK)ND 10.0 1 03/26/2024 17:28 WG2254310
Methylene Chloride ND 5.00 1 03/26/2024 17:28 WG2254310
4-Methyl-2-pentanone (MIBK)ND 10.0 1 03/26/2024 17:28 WG2254310
Methyl tert-butyl ether 1.38 1.00 1 03/26/2024 17:28 WG2254310
Naphthalene ND 5.00 1 03/26/2024 17:28 WG2254310
n-Propylbenzene ND 1.00 1 03/26/2024 17:28 WG2254310
Styrene ND 1.00 1 03/26/2024 17:28 WG2254310
1,1,1,2-Tetrachloroethane ND 1.00 1 03/26/2024 17:28 WG2254310
1,1,2,2-Tetrachloroethane ND 1.00 1 03/26/2024 17:28 WG2254310
Tetrachloroethene ND 1.00 1 03/26/2024 17:28 WG2254310
Toluene ND 1.00 1 03/26/2024 17:28 WG2254310
1,2,3-Trichlorobenzene ND 1.00 1 03/26/2024 17:28 WG2254310
1,2,4-Trichlorobenzene ND 1.00 1 03/26/2024 17:28 WG2254310
tert-Amyl Methyl Ether ND 1.00 1 03/26/2024 17:28 WG2254310
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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SAMPLE RESULTS - 01
L1717113
MW-1
Collected date/time: 03/19/24 11:45
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
1,1,1-Trichloroethane ND 1.00 1 03/26/2024 17:28 WG2254310
1,1,2-Trichloroethane ND 1.00 1 03/26/2024 17:28 WG2254310
Trichloroethene ND 1.00 1 03/26/2024 17:28 WG2254310
Trichlorofluoromethane ND 5.00 1 03/26/2024 17:28 WG2254310
1,2,3-Trichloropropane ND 2.50 1 03/26/2024 17:28 WG2254310
1,2,4-Trimethylbenzene ND 1.00 1 03/26/2024 17:28 WG2254310
1,3,5-Trimethylbenzene ND 1.00 1 03/26/2024 17:28 WG2254310
Vinyl chloride ND 1.00 1 03/26/2024 17:28 WG2254310
o-Xylene ND 1.00 1 03/26/2024 17:28 WG2254310
m&p-Xylenes ND 2.00 1 03/26/2024 17:28 WG2254310
ethanol ND 100 1 03/29/2024 17:47 WG2256050
(S) Toluene-d8 104 80.0-120 03/26/2024 17:28 WG2254310
(S) Toluene-d8 105 80.0-120 03/29/2024 17:47 WG2256050
(S) 4-Bromofluorobenzene 97.2 77.0-126 03/26/2024 17:28 WG2254310
(S) 4-Bromofluorobenzene 102 77.0-126 03/29/2024 17:47 WG2256050
(S) 1,2-Dichloroethane-d4 97.8 70.0-130 03/26/2024 17:28 WG2254310
(S) 1,2-Dichloroethane-d4 97.9 70.0-130 03/29/2024 17:47 WG2256050
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 14:59 6 of 20
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 16:39 6 of 20
SAMPLE RESULTS - 02
L1717113
MW-4
Collected date/time: 03/19/24 12:00
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Acetone ND 50.0 1 03/26/2024 17:49 WG2254310
Acrylonitrile ND 10.0 1 03/26/2024 17:49 WG2254310
t-Amyl Alcohol ND 50.0 1 03/26/2024 17:49 WG2254310
tert-Butyl alcohol ND 5.00 1 03/26/2024 17:49 WG2254310
Benzene ND 1.00 1 03/26/2024 17:49 WG2254310
Bromobenzene ND 1.00 1 03/26/2024 17:49 WG2254310
Bromodichloromethane ND 1.00 1 03/26/2024 17:49 WG2254310
Bromoform ND 1.00 1 03/26/2024 17:49 WG2254310
Bromomethane ND 5.00 1 03/26/2024 17:49 WG2254310
n-Butylbenzene ND 1.00 1 03/26/2024 17:49 WG2254310
sec-Butylbenzene ND 1.00 1 03/26/2024 17:49 WG2254310
tert-Butylbenzene ND 1.00 1 03/26/2024 17:49 WG2254310
Carbon tetrachloride ND 1.00 1 03/26/2024 17:49 WG2254310
Chlorobenzene ND 1.00 1 03/26/2024 17:49 WG2254310
Chlorodibromomethane ND 1.00 1 03/26/2024 17:49 WG2254310
Chloroethane ND 5.00 1 03/26/2024 17:49 WG2254310
Chloroform ND 5.00 1 03/26/2024 17:49 WG2254310
Chloromethane ND 2.50 1 03/26/2024 17:49 WG2254310
2-Chlorotoluene ND 1.00 1 03/26/2024 17:49 WG2254310
4-Chlorotoluene ND 1.00 1 03/26/2024 17:49 WG2254310
1,2-Dibromo-3-Chloropropane ND 5.00 1 03/26/2024 17:49 WG2254310
1,2-Dibromoethane ND 1.00 1 03/26/2024 17:49 WG2254310
Dibromomethane ND 1.00 1 03/26/2024 17:49 WG2254310
1,2-Dichlorobenzene ND 1.00 1 03/26/2024 17:49 WG2254310
1,3-Dichlorobenzene ND 1.00 1 03/26/2024 17:49 WG2254310
1,4-Dichlorobenzene ND 1.00 1 03/26/2024 17:49 WG2254310
Dichlorodifluoromethane ND 5.00 1 03/26/2024 17:49 WG2254310
1,1-Dichloroethane ND 1.00 1 03/26/2024 17:49 WG2254310
1,2-Dichloroethane ND 1.00 1 03/26/2024 17:49 WG2254310
1,1-Dichloroethene ND 1.00 1 03/26/2024 17:49 WG2254310
cis-1,2-Dichloroethene ND 1.00 1 03/26/2024 17:49 WG2254310
trans-1,2-Dichloroethene ND 1.00 1 03/26/2024 17:49 WG2254310
1,2-Dichloropropane ND 1.00 1 03/26/2024 17:49 WG2254310
1,1-Dichloropropene ND 1.00 1 03/26/2024 17:49 WG2254310
1,3-Dichloropropane ND 1.00 1 03/26/2024 17:49 WG2254310
2,2-Dichloropropane ND 1.00 1 03/26/2024 17:49 WG2254310
Di-isopropyl ether 2.99 1.00 1 03/26/2024 17:49 WG2254310
Ethylbenzene ND 1.00 1 03/26/2024 17:49 WG2254310
Ethyl tert-butyl ether ND 1.00 1 03/26/2024 17:49 WG2254310
Hexachloro-1,3-butadiene ND 1.00 1 03/26/2024 17:49 WG2254310
Isopropylbenzene ND 1.00 1 03/26/2024 17:49 WG2254310
p-Isopropyltoluene ND 1.00 1 03/26/2024 17:49 WG2254310
2-Butanone (MEK)ND 10.0 1 03/26/2024 17:49 WG2254310
Methylene Chloride ND 5.00 1 03/26/2024 17:49 WG2254310
4-Methyl-2-pentanone (MIBK)ND 10.0 1 03/26/2024 17:49 WG2254310
Methyl tert-butyl ether 1.69 1.00 1 03/26/2024 17:49 WG2254310
Naphthalene ND 5.00 1 03/26/2024 17:49 WG2254310
n-Propylbenzene ND 1.00 1 03/26/2024 17:49 WG2254310
Styrene ND 1.00 1 03/26/2024 17:49 WG2254310
1,1,1,2-Tetrachloroethane ND 1.00 1 03/26/2024 17:49 WG2254310
1,1,2,2-Tetrachloroethane ND 1.00 1 03/26/2024 17:49 WG2254310
Tetrachloroethene ND 1.00 1 03/26/2024 17:49 WG2254310
Toluene ND 1.00 1 03/26/2024 17:49 WG2254310
1,2,3-Trichlorobenzene ND 1.00 1 03/26/2024 17:49 WG2254310
1,2,4-Trichlorobenzene ND 1.00 1 03/26/2024 17:49 WG2254310
tert-Amyl Methyl Ether ND 1.00 1 03/26/2024 17:49 WG2254310
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 14:59 7 of 20
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 16:39 7 of 20
SAMPLE RESULTS - 02
L1717113
MW-4
Collected date/time: 03/19/24 12:00
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
1,1,1-Trichloroethane ND 1.00 1 03/26/2024 17:49 WG2254310
1,1,2-Trichloroethane ND 1.00 1 03/26/2024 17:49 WG2254310
Trichloroethene ND 1.00 1 03/26/2024 17:49 WG2254310
Trichlorofluoromethane ND 5.00 1 03/26/2024 17:49 WG2254310
1,2,3-Trichloropropane ND 2.50 1 03/26/2024 17:49 WG2254310
1,2,4-Trimethylbenzene ND 1.00 1 03/26/2024 17:49 WG2254310
1,3,5-Trimethylbenzene ND 1.00 1 03/26/2024 17:49 WG2254310
Vinyl chloride ND 1.00 1 03/26/2024 17:49 WG2254310
o-Xylene ND 1.00 1 03/26/2024 17:49 WG2254310
m&p-Xylenes ND 2.00 1 03/26/2024 17:49 WG2254310
ethanol ND 100 1 03/29/2024 18:08 WG2256050
(S) Toluene-d8 105 80.0-120 03/26/2024 17:49 WG2254310
(S) Toluene-d8 105 80.0-120 03/29/2024 18:08 WG2256050
(S) 4-Bromofluorobenzene 99.4 77.0-126 03/26/2024 17:49 WG2254310
(S) 4-Bromofluorobenzene 100 77.0-126 03/29/2024 18:08 WG2256050
(S) 1,2-Dichloroethane-d4 98.1 70.0-130 03/26/2024 17:49 WG2254310
(S) 1,2-Dichloroethane-d4 98.0 70.0-130 03/29/2024 18:08 WG2256050
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 14:59 8 of 20
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 16:39 8 of 20
SAMPLE RESULTS - 03
L1717113
SW-CASVILLE MART
Collected date/time: 03/19/24 12:15
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Acetone ND 50.0 1 03/26/2024 18:09 WG2254310
Acrylonitrile ND 10.0 1 03/26/2024 18:09 WG2254310
t-Amyl Alcohol ND 50.0 1 03/26/2024 18:09 WG2254310
tert-Butyl alcohol ND 5.00 1 03/26/2024 18:09 WG2254310
Benzene ND 1.00 1 03/26/2024 18:09 WG2254310
Bromobenzene ND 1.00 1 03/26/2024 18:09 WG2254310
Bromodichloromethane ND 1.00 1 03/26/2024 18:09 WG2254310
Bromoform ND 1.00 1 03/26/2024 18:09 WG2254310
Bromomethane ND 5.00 1 03/26/2024 18:09 WG2254310
n-Butylbenzene ND 1.00 1 03/26/2024 18:09 WG2254310
sec-Butylbenzene ND 1.00 1 03/26/2024 18:09 WG2254310
tert-Butylbenzene ND 1.00 1 03/26/2024 18:09 WG2254310
Carbon tetrachloride ND 1.00 1 03/26/2024 18:09 WG2254310
Chlorobenzene ND 1.00 1 03/26/2024 18:09 WG2254310
Chlorodibromomethane ND 1.00 1 03/26/2024 18:09 WG2254310
Chloroethane ND 5.00 1 03/26/2024 18:09 WG2254310
Chloroform ND 5.00 1 03/26/2024 18:09 WG2254310
Chloromethane ND 2.50 1 03/26/2024 18:09 WG2254310
2-Chlorotoluene ND 1.00 1 03/26/2024 18:09 WG2254310
4-Chlorotoluene ND 1.00 1 03/26/2024 18:09 WG2254310
1,2-Dibromo-3-Chloropropane ND 5.00 1 03/26/2024 18:09 WG2254310
1,2-Dibromoethane ND 1.00 1 03/26/2024 18:09 WG2254310
Dibromomethane ND 1.00 1 03/26/2024 18:09 WG2254310
1,2-Dichlorobenzene ND 1.00 1 03/26/2024 18:09 WG2254310
1,3-Dichlorobenzene ND 1.00 1 03/26/2024 18:09 WG2254310
1,4-Dichlorobenzene ND 1.00 1 03/26/2024 18:09 WG2254310
Dichlorodifluoromethane ND 5.00 1 03/26/2024 18:09 WG2254310
1,1-Dichloroethane ND 1.00 1 03/26/2024 18:09 WG2254310
1,2-Dichloroethane ND 1.00 1 03/26/2024 18:09 WG2254310
1,1-Dichloroethene ND 1.00 1 03/26/2024 18:09 WG2254310
cis-1,2-Dichloroethene ND 1.00 1 03/26/2024 18:09 WG2254310
trans-1,2-Dichloroethene ND 1.00 1 03/26/2024 18:09 WG2254310
1,2-Dichloropropane ND 1.00 1 03/26/2024 18:09 WG2254310
1,1-Dichloropropene ND 1.00 1 03/26/2024 18:09 WG2254310
1,3-Dichloropropane ND 1.00 1 03/26/2024 18:09 WG2254310
2,2-Dichloropropane ND 1.00 1 03/26/2024 18:09 WG2254310
Di-isopropyl ether ND 1.00 1 03/26/2024 18:09 WG2254310
Ethylbenzene ND 1.00 1 03/26/2024 18:09 WG2254310
Ethyl tert-butyl ether ND 1.00 1 03/26/2024 18:09 WG2254310
Hexachloro-1,3-butadiene ND 1.00 1 03/26/2024 18:09 WG2254310
Isopropylbenzene ND 1.00 1 03/26/2024 18:09 WG2254310
p-Isopropyltoluene ND 1.00 1 03/26/2024 18:09 WG2254310
2-Butanone (MEK)ND 10.0 1 03/26/2024 18:09 WG2254310
Methylene Chloride ND 5.00 1 03/26/2024 18:09 WG2254310
4-Methyl-2-pentanone (MIBK)ND 10.0 1 03/26/2024 18:09 WG2254310
Methyl tert-butyl ether ND 1.00 1 03/26/2024 18:09 WG2254310
Naphthalene ND 5.00 1 03/26/2024 18:09 WG2254310
n-Propylbenzene ND 1.00 1 03/26/2024 18:09 WG2254310
Styrene ND 1.00 1 03/26/2024 18:09 WG2254310
1,1,1,2-Tetrachloroethane ND 1.00 1 03/26/2024 18:09 WG2254310
1,1,2,2-Tetrachloroethane ND 1.00 1 03/26/2024 18:09 WG2254310
Tetrachloroethene ND 1.00 1 03/26/2024 18:09 WG2254310
Toluene ND 1.00 1 03/26/2024 18:09 WG2254310
1,2,3-Trichlorobenzene ND 1.00 1 03/26/2024 18:09 WG2254310
1,2,4-Trichlorobenzene ND 1.00 1 03/26/2024 18:09 WG2254310
tert-Amyl Methyl Ether ND 1.00 1 03/26/2024 18:09 WG2254310
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 14:59 9 of 20
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 16:39 9 of 20
SAMPLE RESULTS - 03
L1717113
SW-CASVILLE MART
Collected date/time: 03/19/24 12:15
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
1,1,1-Trichloroethane ND 1.00 1 03/26/2024 18:09 WG2254310
1,1,2-Trichloroethane ND 1.00 1 03/26/2024 18:09 WG2254310
Trichloroethene ND 1.00 1 03/26/2024 18:09 WG2254310
Trichlorofluoromethane ND 5.00 1 03/26/2024 18:09 WG2254310
1,2,3-Trichloropropane ND 2.50 1 03/26/2024 18:09 WG2254310
1,2,4-Trimethylbenzene ND 1.00 1 03/26/2024 18:09 WG2254310
1,3,5-Trimethylbenzene ND 1.00 1 03/26/2024 18:09 WG2254310
Vinyl chloride ND 1.00 1 03/26/2024 18:09 WG2254310
o-Xylene ND 1.00 1 03/26/2024 18:09 WG2254310
m&p-Xylenes ND 2.00 1 03/26/2024 18:09 WG2254310
ethanol ND 100 1 03/29/2024 18:29 WG2256050
(S) Toluene-d8 104 80.0-120 03/26/2024 18:09 WG2254310
(S) Toluene-d8 105 80.0-120 03/29/2024 18:29 WG2256050
(S) 4-Bromofluorobenzene 96.3 77.0-126 03/26/2024 18:09 WG2254310
(S) 4-Bromofluorobenzene 102 77.0-126 03/29/2024 18:29 WG2256050
(S) 1,2-Dichloroethane-d4 97.4 70.0-130 03/26/2024 18:09 WG2254310
(S) 1,2-Dichloroethane-d4 97.6 70.0-130 03/29/2024 18:29 WG2256050
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 14:59 10 of 20
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 16:39 10 of 20
SAMPLE RESULTS - 04
L1717113
TRIP BLANK
Collected date/time: 03/19/24 00:00
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Acetone ND 50.0 1 03/26/2024 16:47 WG2254310
Acrylonitrile ND 10.0 1 03/26/2024 16:47 WG2254310
t-Amyl Alcohol ND 50.0 1 03/26/2024 16:47 WG2254310
tert-Butyl alcohol ND 5.00 1 03/26/2024 16:47 WG2254310
Benzene ND 1.00 1 03/26/2024 16:47 WG2254310
Bromobenzene ND 1.00 1 03/26/2024 16:47 WG2254310
Bromodichloromethane ND 1.00 1 03/26/2024 16:47 WG2254310
Bromoform ND 1.00 1 03/26/2024 16:47 WG2254310
Bromomethane ND 5.00 1 03/26/2024 16:47 WG2254310
n-Butylbenzene ND 1.00 1 03/26/2024 16:47 WG2254310
sec-Butylbenzene ND 1.00 1 03/26/2024 16:47 WG2254310
tert-Butylbenzene ND 1.00 1 03/26/2024 16:47 WG2254310
Carbon tetrachloride ND 1.00 1 03/26/2024 16:47 WG2254310
Chlorobenzene ND 1.00 1 03/26/2024 16:47 WG2254310
Chlorodibromomethane ND 1.00 1 03/26/2024 16:47 WG2254310
Chloroethane ND 5.00 1 03/26/2024 16:47 WG2254310
Chloroform ND 5.00 1 03/26/2024 16:47 WG2254310
Chloromethane ND 2.50 1 03/26/2024 16:47 WG2254310
2-Chlorotoluene ND 1.00 1 03/26/2024 16:47 WG2254310
4-Chlorotoluene ND 1.00 1 03/26/2024 16:47 WG2254310
1,2-Dibromo-3-Chloropropane ND 5.00 1 03/26/2024 16:47 WG2254310
1,2-Dibromoethane ND 1.00 1 03/26/2024 16:47 WG2254310
Dibromomethane ND 1.00 1 03/26/2024 16:47 WG2254310
1,2-Dichlorobenzene ND 1.00 1 03/26/2024 16:47 WG2254310
1,3-Dichlorobenzene ND 1.00 1 03/26/2024 16:47 WG2254310
1,4-Dichlorobenzene ND 1.00 1 03/26/2024 16:47 WG2254310
Dichlorodifluoromethane ND 5.00 1 03/26/2024 16:47 WG2254310
1,1-Dichloroethane ND 1.00 1 03/26/2024 16:47 WG2254310
1,2-Dichloroethane ND 1.00 1 03/26/2024 16:47 WG2254310
1,1-Dichloroethene ND 1.00 1 03/26/2024 16:47 WG2254310
cis-1,2-Dichloroethene ND 1.00 1 03/26/2024 16:47 WG2254310
trans-1,2-Dichloroethene ND 1.00 1 03/26/2024 16:47 WG2254310
1,2-Dichloropropane ND 1.00 1 03/26/2024 16:47 WG2254310
1,1-Dichloropropene ND 1.00 1 03/26/2024 16:47 WG2254310
1,3-Dichloropropane ND 1.00 1 03/26/2024 16:47 WG2254310
2,2-Dichloropropane ND 1.00 1 03/26/2024 16:47 WG2254310
Di-isopropyl ether ND 1.00 1 03/26/2024 16:47 WG2254310
Ethylbenzene ND 1.00 1 03/26/2024 16:47 WG2254310
Ethyl tert-butyl ether ND 1.00 1 03/26/2024 16:47 WG2254310
Hexachloro-1,3-butadiene ND 1.00 1 03/26/2024 16:47 WG2254310
Isopropylbenzene ND 1.00 1 03/26/2024 16:47 WG2254310
p-Isopropyltoluene ND 1.00 1 03/26/2024 16:47 WG2254310
2-Butanone (MEK)ND 10.0 1 03/26/2024 16:47 WG2254310
Methylene Chloride ND 5.00 1 03/26/2024 16:47 WG2254310
4-Methyl-2-pentanone (MIBK)ND 10.0 1 03/26/2024 16:47 WG2254310
Methyl tert-butyl ether ND 1.00 1 03/26/2024 16:47 WG2254310
Naphthalene ND 5.00 1 03/26/2024 16:47 WG2254310
n-Propylbenzene ND 1.00 1 03/26/2024 16:47 WG2254310
Styrene ND 1.00 1 03/26/2024 16:47 WG2254310
1,1,1,2-Tetrachloroethane ND 1.00 1 03/26/2024 16:47 WG2254310
1,1,2,2-Tetrachloroethane ND 1.00 1 03/26/2024 16:47 WG2254310
Tetrachloroethene ND 1.00 1 03/26/2024 16:47 WG2254310
Toluene ND 1.00 1 03/26/2024 16:47 WG2254310
1,2,3-Trichlorobenzene ND 1.00 1 03/26/2024 16:47 WG2254310
1,2,4-Trichlorobenzene ND 1.00 1 03/26/2024 16:47 WG2254310
tert-Amyl Methyl Ether ND 1.00 1 03/26/2024 16:47 WG2254310
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 14:59 11 of 20
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 16:39 11 of 20
SAMPLE RESULTS - 04
L1717113
TRIP BLANK
Collected date/time: 03/19/24 00:00
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
1,1,1-Trichloroethane ND 1.00 1 03/26/2024 16:47 WG2254310
1,1,2-Trichloroethane ND 1.00 1 03/26/2024 16:47 WG2254310
Trichloroethene ND 1.00 1 03/26/2024 16:47 WG2254310
Trichlorofluoromethane ND 5.00 1 03/26/2024 16:47 WG2254310
1,2,3-Trichloropropane ND 2.50 1 03/26/2024 16:47 WG2254310
1,2,4-Trimethylbenzene ND 1.00 1 03/26/2024 16:47 WG2254310
1,3,5-Trimethylbenzene ND 1.00 1 03/26/2024 16:47 WG2254310
Vinyl chloride ND 1.00 1 03/26/2024 16:47 WG2254310
o-Xylene ND 1.00 1 03/26/2024 16:47 WG2254310
m&p-Xylenes ND 2.00 1 03/26/2024 16:47 WG2254310
ethanol ND 100 1 03/29/2024 16:45 WG2256050
(S) Toluene-d8 108 80.0-120 03/26/2024 16:47 WG2254310
(S) Toluene-d8 109 80.0-120 03/29/2024 16:45 WG2256050
(S) 4-Bromofluorobenzene 96.5 77.0-126 03/26/2024 16:47 WG2254310
(S) 4-Bromofluorobenzene 97.1 77.0-126 03/29/2024 16:45 WG2256050
(S) 1,2-Dichloroethane-d4 93.1 70.0-130 03/26/2024 16:47 WG2254310
(S) 1,2-Dichloroethane-d4 88.3 70.0-130 03/29/2024 16:45 WG2256050
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 14:59 12 of 20
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 16:39 12 of 20
QUALITY CONTROL SUMMARYWG2254310
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1717113-01,02,03,04
Method Blank (MB)
(MB) R4050453-3 03/26/24 13:26
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
Acetone U 11.3 50.0
Acrylonitrile U 0.671 10.0
t-Amyl Alcohol U 4.90 50.0
tert-Butyl alcohol U 4.06 5.00
Benzene U 0.0941 1.00
Bromobenzene U 0.118 1.00
Bromodichloromethane U 0.136 1.00
Bromoform U 0.129 1.00
Bromomethane U 0.605 5.00
n-Butylbenzene U 0.157 1.00
sec-Butylbenzene U 0.125 1.00
tert-Butylbenzene U 0.127 1.00
Carbon tetrachloride U 0.128 1.00
Chlorobenzene U 0.116 1.00
Chlorodibromomethane U 0.140 1.00
Chloroethane U 0.192 5.00
Chloroform U 0.111 5.00
Chloromethane U 0.960 2.50
2-Chlorotoluene U 0.106 1.00
4-Chlorotoluene U 0.114 1.00
1,2-Dibromo-3-Chloropropane U 0.276 5.00
1,2-Dibromoethane U 0.126 1.00
Dibromomethane U 0.122 1.00
1,2-Dichlorobenzene U 0.107 1.00
1,3-Dichlorobenzene U 0.110 1.00
1,4-Dichlorobenzene U 0.120 1.00
Dichlorodifluoromethane U 0.374 5.00
1,1-Dichloroethane U 0.100 1.00
1,2-Dichloroethane U 0.0819 1.00
1,1-Dichloroethene U 0.188 1.00
cis-1,2-Dichloroethene U 0.126 1.00
trans-1,2-Dichloroethene U 0.149 1.00
1,2-Dichloropropane U 0.149 1.00
1,1-Dichloropropene U 0.142 1.00
1,3-Dichloropropane U 0.110 1.00
2,2-Dichloropropane U 0.161 1.00
Di-isopropyl ether U 0.105 1.00
Ethylbenzene U 0.137 1.00
Ethyl tert-butyl ether U 0.101 1.00
Hexachloro-1,3-butadiene U 0.337 1.00
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 14:59 13 of 20
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 16:39 13 of 20
QUALITY CONTROL SUMMARYWG2254310
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1717113-01,02,03,04
Method Blank (MB)
(MB) R4050453-3 03/26/24 13:26
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
Isopropylbenzene U 0.105 1.00
p-Isopropyltoluene U 0.120 1.00
2-Butanone (MEK)U 1.19 10.0
Methylene Chloride U 0.430 5.00
4-Methyl-2-pentanone (MIBK)U 0.478 10.0
Methyl tert-butyl ether U 0.101 1.00
Naphthalene U 1.00 5.00
n-Propylbenzene U 0.0993 1.00
Styrene U 0.118 1.00
1,1,1,2-Tetrachloroethane U 0.147 1.00
1,1,2,2-Tetrachloroethane U 0.133 1.00
Tetrachloroethene U 0.300 1.00
Toluene U 0.278 1.00
1,2,3-Trichlorobenzene U 0.230 1.00
1,2,4-Trichlorobenzene U 0.481 1.00
tert-Amyl Methyl Ether U 0.195 1.00
1,1,1-Trichloroethane U 0.149 1.00
1,1,2-Trichloroethane U 0.158 1.00
Trichloroethene U 0.190 1.00
Trichlorofluoromethane U 0.160 5.00
1,2,3-Trichloropropane U 0.237 2.50
1,2,4-Trimethylbenzene U 0.322 1.00
1,3,5-Trimethylbenzene U 0.104 1.00
Vinyl chloride U 0.234 1.00
o-Xylene U 0.174 1.00
m&p-Xylenes U 0.430 2.00
(S) Toluene-d8 105 80.0-120
(S) 4-Bromofluorobenzene 97.8 77.0-126
(S) 1,2-Dichloroethane-d4 95.2 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4050453-1 03/26/24 12:23 • (LCSD) R4050453-2 03/26/24 12:43
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l %%%%%
Acetone 25.0 26.7 24.6 107 98.4 19.0-160 8.19 27
Acrylonitrile 25.0 22.9 22.2 91.6 88.8 55.0-149 3.10 20
tert-Butyl alcohol 25.0 28.1 23.1 112 92.4 27.0-160 19.5 30
Benzene 5.00 4.99 5.24 99.8 105 70.0-123 4.89 20
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 14:59 14 of 20
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 16:39 14 of 20
QUALITY CONTROL SUMMARYWG2254310
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1717113-01,02,03,04
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4050453-1 03/26/24 12:23 • (LCSD) R4050453-2 03/26/24 12:43
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l %%%%%
Bromobenzene 5.00 4.78 5.12 95.6 102 73.0-121 6.87 20
Bromodichloromethane 5.00 4.67 4.84 93.4 96.8 75.0-120 3.58 20
Bromoform 5.00 4.67 4.67 93.4 93.4 68.0-132 0.000 20
Bromomethane 5.00 6.47 6.87 129 137 10.0-160 6.00 25
n-Butylbenzene 5.00 4.80 4.90 96.0 98.0 73.0-125 2.06 20
sec-Butylbenzene 5.00 4.96 5.31 99.2 106 75.0-125 6.82 20
tert-Butylbenzene 5.00 5.07 5.27 101 105 76.0-124 3.87 20
Carbon tetrachloride 5.00 5.30 5.53 106 111 68.0-126 4.25 20
Chlorobenzene 5.00 4.86 4.93 97.2 98.6 80.0-121 1.43 20
Chlorodibromomethane 5.00 4.61 4.63 92.2 92.6 77.0-125 0.433 20
Chloroethane 5.00 6.36 6.49 127 130 47.0-150 2.02 20
Chloroform 5.00 5.08 5.26 102 105 73.0-120 3.48 20
Chloromethane 5.00 4.50 4.92 90.0 98.4 41.0-142 8.92 20
2-Chlorotoluene 5.00 4.97 5.17 99.4 103 76.0-123 3.94 20
4-Chlorotoluene 5.00 4.98 5.26 99.6 105 75.0-122 5.47 20
1,2-Dibromo-3-Chloropropane 5.00 4.29 4.07 85.8 81.4 58.0-134 5.26 20
1,2-Dibromoethane 5.00 4.53 4.55 90.6 91.0 80.0-122 0.441 20
Dibromomethane 5.00 4.87 4.77 97.4 95.4 80.0-120 2.07 20
1,2-Dichlorobenzene 5.00 5.04 4.91 101 98.2 79.0-121 2.61 20
1,3-Dichlorobenzene 5.00 4.92 5.04 98.4 101 79.0-120 2.41 20
1,4-Dichlorobenzene 5.00 4.91 5.02 98.2 100 79.0-120 2.22 20
Dichlorodifluoromethane 5.00 6.43 6.75 129 135 51.0-149 4.86 20
1,1-Dichloroethane 5.00 5.23 5.35 105 107 70.0-126 2.27 20
1,2-Dichloroethane 5.00 4.50 4.70 90.0 94.0 70.0-128 4.35 20
1,1-Dichloroethene 5.00 5.80 6.09 116 122 71.0-124 4.88 20
cis-1,2-Dichloroethene 5.00 5.33 5.46 107 109 73.0-120 2.41 20
trans-1,2-Dichloroethene 5.00 5.47 5.72 109 114 73.0-120 4.47 20
1,2-Dichloropropane 5.00 4.51 4.71 90.2 94.2 77.0-125 4.34 20
1,1-Dichloropropene 5.00 5.27 5.39 105 108 74.0-126 2.25 20
1,3-Dichloropropane 5.00 4.53 4.66 90.6 93.2 80.0-120 2.83 20
2,2-Dichloropropane 5.00 6.02 6.31 120 126 58.0-130 4.70 20
Di-isopropyl ether 5.00 4.51 4.61 90.2 92.2 58.0-138 2.19 20
Ethylbenzene 5.00 4.86 5.03 97.2 101 79.0-123 3.44 20
Ethyl tert-butyl ether 5.00 4.89 4.96 97.8 99.2 63.0-138 1.42 20
Hexachloro-1,3-butadiene 5.00 4.61 4.38 92.2 87.6 54.0-138 5.12 20
Isopropylbenzene 5.00 5.08 5.30 102 106 76.0-127 4.24 20
p-Isopropyltoluene 5.00 5.13 5.27 103 105 76.0-125 2.69 20
2-Butanone (MEK)25.0 20.9 21.1 83.6 84.4 44.0-160 0.952 20
Methylene Chloride 5.00 5.10 5.26 102 105 67.0-120 3.09 20
4-Methyl-2-pentanone (MIBK)25.0 21.4 21.3 85.6 85.2 68.0-142 0.468 20
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 14:59 15 of 20
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 16:39 15 of 20
QUALITY CONTROL SUMMARYWG2254310
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1717113-01,02,03,04
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4050453-1 03/26/24 12:23 • (LCSD) R4050453-2 03/26/24 12:43
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l %%%%%
Methyl tert-butyl ether 5.00 5.32 5.31 106 106 68.0-125 0.188 20
Naphthalene 5.00 3.98 3.96 79.6 79.2 54.0-135 0.504 20
n-Propylbenzene 5.00 5.02 5.26 100 105 77.0-124 4.67 20
Styrene 5.00 4.87 5.04 97.4 101 73.0-130 3.43 20
1,1,1,2-Tetrachloroethane 5.00 4.84 4.97 96.8 99.4 75.0-125 2.65 20
1,1,2,2-Tetrachloroethane 5.00 4.84 4.93 96.8 98.6 65.0-130 1.84 20
Tetrachloroethene 5.00 5.12 5.22 102 104 72.0-132 1.93 20
Toluene 5.00 5.00 5.20 100 104 79.0-120 3.92 20
1,2,3-Trichlorobenzene 5.00 4.55 4.21 91.0 84.2 50.0-138 7.76 20
1,2,4-Trichlorobenzene 5.00 4.78 4.77 95.6 95.4 57.0-137 0.209 20
tert-Amyl Methyl Ether 5.00 5.38 5.46 108 109 66.0-125 1.48 20
1,1,1-Trichloroethane 5.00 5.18 5.54 104 111 73.0-124 6.72 20
1,1,2-Trichloroethane 5.00 4.70 4.84 94.0 96.8 80.0-120 2.94 20
Trichloroethene 5.00 4.68 4.94 93.6 98.8 78.0-124 5.41 20
Trichlorofluoromethane 5.00 5.12 5.60 102 112 59.0-147 8.96 20
1,2,3-Trichloropropane 5.00 4.61 4.83 92.2 96.6 73.0-130 4.66 20
1,2,4-Trimethylbenzene 5.00 5.08 5.16 102 103 76.0-121 1.56 20
1,3,5-Trimethylbenzene 5.00 5.07 5.20 101 104 76.0-122 2.53 20
Vinyl chloride 5.00 5.48 5.57 110 111 67.0-131 1.63 20
o-Xylene 5.00 4.99 5.16 99.8 103 80.0-122 3.35 20
m&p-Xylenes 10.0 9.88 10.3 98.8 103 80.0-122 4.16 20
(S) Toluene-d8 104 103 80.0-120
(S) 4-Bromofluorobenzene 101 100 77.0-126
(S) 1,2-Dichloroethane-d4 94.1 96.2 70.0-130
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 14:59 16 of 20
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Apex Companies, LLC - Roanoke, VA 768566-001 L1717113 03/30/24 16:39 16 of 20
QUALITY CONTROL SUMMARYWG2256050
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1717113-01,02,03,04
Method Blank (MB)
(MB) R4051783-4 03/29/24 16:25
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
ethanol U 42.0 100
(S) Toluene-d8 106 80.0-120
(S) 4-Bromofluorobenzene 105 77.0-126
(S) 1,2-Dichloroethane-d4 98.1 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4051783-1 03/29/24 14:33 • (LCSD) R4051783-2 03/29/24 14:54
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l %%%%%
ethanol 250 247 261 98.8 104 10.0-160 5.51 30
(S) Toluene-d8 104 105 80.0-120
(S) 4-Bromofluorobenzene 101 102 77.0-126
(S) 1,2-Dichloroethane-d4 97.3 99.8 70.0-130
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GLOSSARY OF TERMS
Guide to Reading and Understanding Your Laboratory Report
The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not
intended as a comprehensive explanation, and if you have additional questions please contact your project representative.
Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name, Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received.
Abbreviations and Definitions
MDL Method Detection Limit.
ND Not detected at the Reporting Limit (or MDL where applicable).
RDL Reported Detection Limit.
Rec.Recovery.
RPD Relative Percent Difference.
SDG Sample Delivery Group.
(S)Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be detected in all environmental media.
U Not detected at the Reporting Limit (or MDL where applicable).
Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes
reported.
Dilution
If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the
standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the
laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the
result reported has already been corrected for this factor.
Limits
These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal
for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or
duplicated within these ranges.
Qualifier
This column provides a letter and/or number designation that corresponds to additional information concerning the result
reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and
potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable.
Result
The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was
no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL”
(Below Detectable Levels). The information in the results column should always be accompanied by either an MDL
(Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect
or report for this analyte.
Uncertainty
(Radiochemistry)Confidence level of 2 sigma.
Case Narrative (Cn)
A brief discussion about the included sample results, including a discussion of any non-conformances to protocol
observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will
be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report.
Quality Control
Summary (Qc)
This section of the report includes the results of the laboratory quality control analyses required by procedure or
analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not
being performed on your samples typically, but on laboratory generated material.
Sample Chain of
Custody (Sc)
This is the document created in the field when your samples were initially collected. This is used to verify the time and
date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This
chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the
samples from the time of collection until delivery to the laboratory for analysis.
Sample Results (Sr)
This section of your report will provide the results of all testing performed on your samples. These results are provided
by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for
each sample will provide the name and method number for the analysis reported.
Sample Summary (Ss)This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and
times of preparation and/or analysis.
Qualifier Description
The remainder of this page intentionally left blank, there are no qualifiers applied to this SDG.
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Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122
Alabama 40660 Nebraska NE-OS-15-05
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California 2932 New Mexico ¹TN00003
Colorado TN00003 New York 11742
Connecticut PH-0197 North Carolina Env375
Florida E87487 North Carolina ¹DW21704
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Georgia ¹923 North Dakota R-140
Idaho TN00003 Ohio–VAP CL0069
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Indiana C-TN-01 Oregon TN200002
Iowa 364 Pennsylvania 68-02979
Kansas E-10277 Rhode Island LAO00356
Kentucky ¹ ⁶KY90010 South Carolina 84004002
Kentucky ²16 South Dakota n/a
Louisiana AI30792 Tennessee ¹ ⁴2006
Louisiana LA018 Texas T104704245-20-18
Maine TN00003 Texas ⁵LAB0152
Maryland 324 Utah TN000032021-11
Massachusetts M-TN003 Vermont VT2006
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A2LA – ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789
A2LA – ISO 17025 ⁵1461.02 DOD 1461.01
Canada 1461.01 USDA P330-15-00234
EPA–Crypto TN00003
ACCREDITATIONS & LOCATIONS

¹ Drinking Water ² Underground Storage Tanks ³ Aquatic Toxicity ⁴ Chemical/Microbiological ⁵ Mold ⁶ Wastewater n/a Accreditation not applicable
* Not all certifications held by the laboratory are applicable to the results reported in the attached report.
* Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace Analytical.
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