WS_4900_16457_MRP_20220603

SUBSEQUENT GROUNDWATER MONITORING
REPORT
Stephen’s Exxon (Incident #16457)
20655 Highway 88 West
Creston, Ashe County, North Carolina
June 3, 2022
Terracon Project No. 75207132

Prepared for:
North Carolina Department of Environmental Quality
Division of Waste Management
Raleigh, North Carolina

Prepared by:
Terracon Consultants, Inc.
Greensboro, North Carolina

Terracon Consultants, Inc. 7327-G West friendly Avenue Greensboro, NC 27410
P 336-3365-8135 F 336-365-7020 terracon.com
June 3, 2022

Mr. Herb Berger, L.G.
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Email: [e-mail]

Re: Subsequent Groundwater Monitoring Report
Stephen’s Exxon
20655 Highway 88 West
Creston, Ashe County, North Carolina
UST Incident Number: 16457
Terracon Project No. 75207132

Dear Mr. Berger:

Terracon Consultants, Inc. (Terracon) is pleased to submit this Groundwater Monitoring Report for
the above referenced property. This report has been prepared in general accordance with North
Carolina Department of Environmental Quality (NCDEQ), UST Section Guidelines for Assessment
and Corrective Action for UST Releases, dated January 19, 2021, and Task Authorization No. 02,
approved on February 7, 2022.

If you have any questions regarding this report or the assessment activities, please contact us at
336-365-8135.

Sincerely,
Terracon Consultants, Inc.

F. Christopher Driscoll, P.G. Edmund Woloszyn Jr. R.E.M
Project Geologist Authorized Project Reviewer

Enclosures

Table of Contents
A. SITE INFORMATION................................................................................................ 1
B. EXECUTIVE SUMMARY .......................................................................................... 2
C. SITE HISTORY AND CHARACTERIZATION ........................................................... 4
C.1 Site Setting .................................................................................................................................... 4
C.2 Release Summary ......................................................................................................................... 4
C.3 Previous Investigations ................................................................................................................. 5
C.4 Water Supply Wells ....................................................................................................................... 7
C.5 Surface Water ............................................................................................................................... 7
C.6 Land Use Information .................................................................................................................... 7
D. ASSESSMENT INFORMATION ............................................................................ 7
D.1 Site Geology and Hydrogeology .................................................................................................... 7
D.2 Air Sparge Well and Recovery Well Installation ............................................................................ 8
D.3 Mobile Multiphase Extraction (MMPE) and Air Sparging Event .................................................... 9
D.4 Sampling Activities ...................................................................................................................... 10
D.4.1 LNAPL Evaluation ....................................................................................................................... 10
D.5 Analytical Results ........................................................................................................................ 10
E. CONCLUSIONS AND RECOMMENDATIONS ................................................... 11

EXHIBITS
Exhibit 1: Topographic Map
Exhibit 2: Site Diagram
Exhibit 3: Water Supply Well Map
Exhibit 4: Groundwater Elevation Contour Map (May 2022)
Exhibit 5: Groundwater Analytical Results (May 2022)

TABLES
Table 1: Water Supply Well and Spring Information
Table 2: Historical Water Supply Wells Analytical Results
Table 3: Monitoring Well Construction Information and Water Level Measurements
Table 4: Summary of Groundwater Analytical Results

APPENDIX
Appendix A: Field Notes
Appendix B: Well Logs and Monitoring Well Construction Records
Appendix C: Mobile Multi-Phase Extraction Event Report
Appendix D: Laboratory Analytical Results and Chain of Custody Forms
Stephen’s Exxon
Creston, North Carolina
Terracon Project No. 75207132
Incident No. 16457
June 3, 2022

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SUBSEQUENT GROUNDWATER MONITORING REPORT
A. SITE INFORMATION
Date of Report: June 3, 2022
NCDEQ Incident No: 16457
Facility ID: 0-000453
UST #: WS-4900
Site Name: Stephens Exxon
Site Location: 20655 Highway 88 West
Creston, Ashe County, North Carolina 28615
Latitude: N 36.401515
Longitude: W -81.693370
UST Owner/Operator: Segraves Oil Company, Inc.

Current Property Owner: Vincent Boccardy and Courtney Cutillo
420 Barlow Rd
Creston, North Carolina 28615

Current Property Occupant: Vincent Boccardy and Courtney Cutillo
420 Barlow Rd
Creston, North Carolina 28615

Consultant: Terracon Consultants, Inc. (Contact: F. Christopher Driscoll)
7327-G W. Friendly Ave
Greensboro, North Carolina 27410
[phone]
Laboratory: Pace Analytical National Center for Testing and Innovation
12065 Lebanon Road
Mount Juliet, Tennessee 37122
[phone]
Release Information: Release Date: October 1996
Estimated Quantity: Unknown
Source: three 2,000-gallon gasoline USTs, one 560-gallon Kerosene
UST
Cause of Release: Leaking product lines
Currently Active Tanks: None
Stephen’s Exxon
Creston, North Carolina
Terracon Project No. 75207132
Incident No. 16457
June 3, 2022

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I, F. Christopher Driscoll, a Licensed Geologist for Terracon Consultants, Inc., do certify that the
information contained in this report is correct and accurate to the best of my knowledge.

F. Christopher Driscoll, P.G.
NC License No. 2695

Terracon Consultants, Inc. is licensed to practice geology/engineering in North Carolina. The
certification number of the corporation is F-0869.
B. EXECUTIVE SUMMARY
The purpose of this report is to evaluate the current status of the groundwater quality at the former
Stephen’s Exxon site (Incident No. 16457) by sampling monitoring wells MW-11, MW-13, and MW-
14 subsequent to a mobile multi-phase extraction (MMPE) event. Terracon completed this report to
summarize the findings of groundwater sampling activities performed on May 10, 2022. The release
incident is situated on the property located at 20655 Highway 88 West in Creston, Ashe County,
North Carolina in an area developed with rural residences. The site currently operates as a
workshop for the current property owner. According to previous investigations completed at the site,
there appears to be two separate plume at the site: a gasoline plume located on the northeastern
section of the site in the vicinity of MW-5R and a kerosene plume located west of the on-site building
near MW-11.

On April 19, 2022, Terracon and a North Carolina registered well driller, Environmental Drilling &
Probing Services (EDPS), mobilized to the site to install one recovery well (RW -1) and one air
sparge well (AS-1) in the vicinity of the kerosene plume on the west side of the on-site building. Well
top-of-casing (TOC) relative elevations for newly installed wells AS-1 and RW-1 were surveyed
using a Topcon self-leveling laser level using MW-11 as a benchmark.
Terracon personnel mobilized to the site on May 2, 2022, to oversee the initiation of a 96-hour
MMPE and air sparge event at wells AS-1 and RW-1 by Terracon’s subcontractor Advanced
Environmental Services (AES). Subsequent to the MMPE event, Terracon mobilized to the site on
May 10, 2022, to sample monitoring wells MW-11, MW-13, and MW-14.
Based on information obtained during the completion of our assessment activities, groundwater is
estimated to flow towards the southeast. Two newly installed wells RW-1 (a recovery well) and AS-1
(an air sparge well), were installed in the vicinity of the former kerosene UST near MW -11. Light
Non-Aqueous Phase Liquids (LNAPL) was observed in the monitoring well MW-11 (0.13 feet) prior
to the MMPE event then not present subsequent to the MMPE event. Following the 96-hour MMPE
and air sparge event conducted at wells AS-1 and RW-1, 2,670 gallons of a product/water mixture
were removed from the site. Approximately 6 gallons of free product was recovered as liquid. Mass
Stephen’s Exxon
Creston, North Carolina
Terracon Project No. 75207132
Incident No. 16457
June 3, 2022

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balance calculations indicated total VOC emissions removed from the wells as vapor equated to
7.67 gallons.
Wells MW-11 and MW-13 reported concentrations of contaminants above the MDLs but below the
2L Standards for volatile organic compounds. However, field observations indicated a strong
petroleum odor emanating from the groundwater purged from monitoring well MW-11. Petroleum
constituents were not reported at concentrations exceeding the MDLs in MW-14. Volatile organic
compounds (VOCs) have significantly decreased in concentration in monitoring wells MW-11, MW-
13, and MW-14 since the September 2021 sampling event.
Based on information obtained during the completion of our assessment activities, Terracon
provides the following conclusions and findings.

Groundwater flow is estimated to be towards the southeast.
There are four private water supply wells (one-inactive) and five water supply springs within a
1,500-foot radius of the site. Municipal water is not available to the site or the immediately
surrounding properties.
Two additional wells, RW-1 and AS-1, were successfully installed in the vicinity of the former
kerosene UST near MW-11.
Following the 96-hour MMPE and air sparge event conducted at wells AS-1 and RW-1, a total of
2,670 gallons of a product/water mixture were removed from the site. Approximately 6 gallons of
free product was recovered as liquid. Mass balance calculations indicated total VOC emissions
removed from the wells as vapor equated to 7.67 gallons. Following the event, LNAPL was
identified in any well.
LNAPL was observed in the monitoring well MW-11 (0.13 feet) prior to the MMPE event then not
present subsequent to the MMPE event.
Wells MW-11 and MW-13 reported concentrations of volatile organic compounds above the
MDLs but below the 2L Standards.
Petroleum constituents were not reported at concentrations exceeding the MDLs in MW-14.
Contaminants have significantly decreased in concentration in monitoring wells MW-13 and MW-
14 since the September 2021 sampling event.
Based on the data presented in this monitoring report, Terracon recommends the following activities
be completed at the site.
Considering water supply well WSW-8 is approximately 70 feet down-gradient of the kerosene
plume at the site, Terracon recommends considering seeking a water supply well abandonment
agreement for WSW-8 for closure of the well in accordance with 15A NCAC 2C rules if
permission is given by the property owner.
Stephen’s Exxon
Creston, North Carolina
Terracon Project No. 75207132
Incident No. 16457
June 3, 2022

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Conduct a sampling event to evaluate the current status of wells associated with the gasoline
UST using EPA Methods 6200 and sample the wells at the kerosene UST release area using
EPA Methods 6200 and 625 Base/ Neutrals and Acids plus 10 largest non-target peaks, MADEP
VPH, and MADEP EPH.
If results from the sampling event continue to indicate contaminant levels below GCLs, conduct a
fate and transport model to determine the potential for contaminants to migrate to nearby
receptors.
C. SITE HISTORY AND CHARACTERIZATION
The purpose of this report is to evaluate the current status of the groundwater quality at the former
Stephens Exxon site. Terracon completed this report to summarize the findings of assessment
activities performed on May 10, 2022 at the former Stephen’s Exxon located at 20655 Highway 88
West in Creston, Ashe County, North Carolina (Exhibit 1). This Groundwater Monitoring Report was
prepared for the site in response to a request by the Incident Manager, Mr. Herb Berger with the
NCDEQ Division of Waste Management, Trust Fund Branch.

The Federal/State Lead Monitoring Report was prepared in general accordance with 15A NCAC 2L
.0115 regulations and the NCDEQ Underground Storage Tank (UST) Section Assessment
Guidelines, dated January 19, 2021, under the supervision of Mr. F. Christopher Driscoll, a North
Carolina licensed geologist (North Carolina License No. 2695).

C.1 Site Setting

The Stephen’s Exxon site is located at 20655 Highway 88 West in Creston, Ashe County, North
Carolina. The site is bordered to the north by NC Highway 88 West with surrounding residential and
agricultural parcels in a rural setting. The property has been developed with a single one-story
structure that serves as a workshop for the current property owner with asphalt and concrete parking
areas. Historically, the site operated as Joe Stephen’s Grocery that maintained three 2,000 -gallon
gasoline USTs and one 560-gallon Kerosene UST. The site is depicted in Exhibit 2.

C.2 Release Summary

According to historical assessment information, three 2,000-gallon gasoline USTs were installed in
May 1975 and one 560-gallon Kerosene UST was installed in May 1976. The gasoline USTs were
located near the northeast corner of the building on the property and the kerosene UST was located
along the west side of the building. The gasoline USTs, most of the product lines, and approximately
100 cubic yards of contaminated soil were removed from the property in October 1996. Upon
removal of the USTs, representatives from the Winston-Salem Regional Office, Division of Water
Quality noted the soil at the excavation site to be discolored and odorous.
Stephen’s Exxon
Creston, North Carolina
Terracon Project No. 75207132
Incident No. 16457
June 3, 2022

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C.3 Previous Investigations

Upon removal of the three 2,000-gallon gasoline USTs in October 1996, soil samples were collected
from the excavation site and the former fuel dispenser location by representatives of the Winston-
Salem Regional Office, Division of Water Quality. Laboratory analysis of the soil samples yielded
petroleum contaminants exceeding the North Carolina State Action Level of 10 parts per million.
During the same month, Salem Environmental installed a monitoring well (MW-1) in the proximity of
the former gasoline USTs which yielded groundwater with a distinct petroleum odor. Due to
evidence of contamination, the North Carolina Department of Environment and Natural Resources
(NCDENR) requested further investigation to evaluate the extent of the release.

Between March and June 1997, Geonetics Corporation (Geonetics) installed five shallow monitoring
wells (MW-2 through MW-6) around the building on the property, two temporary wells (TW-2 and
TW-3) east of the building on the property, and a deep aquifer monitoring well (MW-7) south of the
former UST location to further delineate the extent of petroleum impact on the site. Laboratory
analysis from subsequent groundwater sampling in monitoring wells MW-1, MW-5, and TW-2
identified concentrations of petroleum constituents above Title 15A of the North Carolina
Administrative Code subchapter 2L (15A NCAC 2L) groundwater standards, hereafter referred to as
the 2L Standards. To further delineate petroleum contamination, Geonetics installed two additional
shallow monitoring wells (MW-8 and MW-9) further east on the property towards the North Fork New
River.

In August 1998, Geonetics facilitated the removal of the 560-gallon Kerosene UST on the site along
with approximately 7.3 cubic yards of contaminated soil. Laboratory analysis from collected soil
samples reported concentrations that exceeded the Soil-to-Water Maximum Soil Contaminant
Concentrations (MSCCs) with detections of volatile and semi-volatile total petroleum hydrocarbons
in excess of the North Carolina State Action Level of 10 parts per million. Geonetics concluded that
groundwater contamination was due to releases from the UST systems and submitted a Corrective
Action Plan (CAP) that proposed further remedial excavations. To further delineate petroleum
contamination, Geonetics installed one additional shallow monitoring well (MW-10) in the vicinity of
the removed kerosene tank basin.

Between June and July 2003, Geonetics excavated approximately 832 tons of contaminated soil
above the water table from the former UST basins and dispenser locations. Laboratory analysis from
soils collected at the bottom of the excavation area indicated the continued presence of residual
petroleum contaminants exceeding the lowest value of either the Residential and Soil-to-
Groundwater Maximum Soil Contaminant Concentrations (MSCCs) several feet below the water
table, as well as in the soil beneath the building on the property. To further delineate petroleum
contamination, Geonetics installed two additional shallow monitoring wells (MW-11 and MW-12)
around the vicinity of the on-site building.

Stephen’s Exxon
Creston, North Carolina
Terracon Project No. 75207132
Incident No. 16457
June 3, 2022

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In March 2004, the NCDENR requested a soil excavation event near the former fuel dispenser
island. Samples of soil collected from the bottom of the excavation pit yielded concentrations of
benzene, toluene, ethylbenzene, and xylenes (BTEX) in excess of Soil-to-Groundwater MSCCs.

In May 2004, Geonetics conducted a groundwater monitoring event at the site. Laboratory analysis
indicated the presence of elevated BTEX concentrations above 2L Standards in monitoring wells
MW-5 and MW-11, which are located south of the former UST basin.

In February 2011, Terraine Environmental (Terraine) conducted a groundwater monitoring event at
the site. One foot of measurable light non-aqueous phase liquid (LNAPL) was present in monitoring
well MW-11. Laboratory analysis confirmed the presence of petroleum contaminants in monitoring
wells MW-2, MW-3, MW-4, MW-7, and MW-12. However, petroleum constituents in the groundwater
samples did not contain analytes at concentrations exceeding 2L Standards.

In August 2011, Terraine returned to the site to supervise an Aggressive Fluid Vapor Recovery
(AFVR) event on monitoring well MW-11. After the event, approximately 175 gallons of petroleum
impacted groundwater were recovered. Approximately 0.2 feet of LNAPL continued to be observed
in MW-11. Laboratory analysis from groundwater sampling following the AFVR event indicated a
decrease in petroleum impact in monitoring wells MW-4 and MW-12. Following sampling, Terraine
installed a Universal Remediation, Inc., PRP Well Boom in monitoring well MW-11 in an effort to
lower petroleum contaminant concentrations.

Throughout 2012 and 2013, Crawford Environmental Services (CEM) conducted a series of
groundwater monitoring events. Measurable amounts of LNAPL continued to be observed in
monitoring well MW-11. Laboratory analysis identified detectable levels of petroleum contaminants
in monitoring wells MW-3 and MW-12.

In October 2014, ATC Associates of North Carolina, P.C. (ATC) conducted a groundwater
monitoring event. Measurable amounts of LNAPL continued to be observed in monitoring well MW-
11. Laboratory analysis from groundwater sampling identified multiple constituents exceeding 2L
Standards in monitoring well MW-5. In August 2018, ATC returned to sample monitoring wells and
identified concentrations of isopropyl ether and sec-butylbenzene below 2L Standards.

Between March and October 2019, ATC installed five shallow monitoring wells (MW-13 through
MW-17) to further delineate the horizontal extent of the petroleum impact and installed shallow
monitoring well MW-5R near the location of MW-5 as it was no longer found on the site. Measurable
LNAPL continued to appear in monitoring well MW-11. Laboratory analysis from groundwater
sampling identified concentrations of petroleum constituents above 2L Standards in monitoring well
MW-5R. ATC concluded that there appeared to be two plumes: one associated with kerosene (near
MW-11) and another with gasoline (near MW-5R).

In August 2021, Terracon Consultants, Inc. (Terracon) conducted a Mobile Multi-Phase Extraction
Stephen’s Exxon
Creston, North Carolina
Terracon Project No. 75207132
Incident No. 16457
June 3, 2022

Responsive ■ Resourceful ■ Reliable 7
(MMPE) event at monitoring well MW-7. A total of 3.77 gallons of mixed product and water were
removed from the site. Approximately 8 gallons of free product was recovered as liquid and 3.33
gallons of Volatile Organic Compounds (VOCs) were removed as vapor. After the event, no free
product was identified in any of the on-site monitoring wells.

C.4 Water Supply Wells

Based on receptor survey information provided by Geonetics in 2012, there are four private water
supply wells (one-inactive) and five water supply springs within a 1,500-foot radius of the site. The
on-site water supply well (WSW-8) is located approximately 60 feet southwest of the former
kerosene UST release source area. Geonetics did not find evidence at the time of the assessment
that the water supply springs or potential receptors were affected by the UST release. The locations
of the water supply wells are shown on Exhibit 3 and water supply well information is provided in
Table 1.

In 2015, ATC identified and sampled three water supply wells and springs (WSW-6, WSW-7, and
WSW-8) located within 1,000 feet from the site. Wells WSW-6 and WSW-7 are located cross-
gradient and approximately 600 feet and 950 feet from the source release, respectively. Analytical
results did not identify detectable concentrations of petroleum constituents in the tested water supply
wells. In March 2019, ATC sampled water supply wells WSW-7 and WSW-8 and did not identify
petroleum contaminants above MDLs. Historical water supply analytical groundwater results from
previous sampling events are provided in Table 2.

C.5 Surface Water

A small intermittent stream runs along the western border of the property. The North Fork of the New
River is located approximately 720 feet southeast of the former UST basin. The North Fork of the
New River is depicted as Class C, Trout Waters. Surface runoff on the site is generally to southeast.
A spring is located north of well MW-2 and is piped underground heading southeast towards the
river. Surface waters are depicted on Exhibit 1.

C.6 Land Use Information

The site is bound to the north by NC Highway 88 and single-family residences, to the east by
agricultural land and single-family residences, to the west by single-family residences, and to the
south by agricultural land and the North Fork of the New River.
D. ASSESSMENT INFORMATION

D.1 Site Geology and Hydrogeology

Stephen’s Exxon
Creston, North Carolina
Terracon Project No. 75207132
Incident No. 16457
June 3, 2022

Responsive ■ Resourceful ■ Reliable 8
The following resources were reviewed to evaluate site-specific geological and hydrogeological
characteristics.

Baldwin Gap Quadrangle, North Carolina, USGS 7.5-minute series topographic map, dated
2003. (Exhibit 1).
Geologic Map of North Carolina, dated 1985.
The Geology of the Carolinas, Carolina Geological Society Fiftieth Anniversary Volume, edited by
J. Wright Horton, Jr., and Victor A. Zullo, The University of Tennessee Press, dated 1991.
Soil Survey of Ashe County, North Carolina, US Department of Agriculture, Natural Resources
Conservation Service, Web Soil Survey via the Internet, http://websoilsurvey.nrcs.usda.gov/app/
The site is located within the Blue Ridge Physiographic Province which generally consists of tall,
high-relief topography and long northeast to southwest trending ridges with incised creeks and river
channels. According to the geologic map, the site is specifically underlain by an unconformity with
bedrock consisting of biotite granitic gneiss.

In-place chemical and physical weathering of parent rocks typically form residual soils in the Blue
Ridge region. Weathering is facilitated by the presence of fractures, joints, and less resistant
minerals in the rock. Saprolite derived from the underlying bedrock is generally thinner in the Blue
Ridge than in the Piedmont. Furthermore, soils on mountain slopes are moved down-slope by water
and gravity more readily than in the more moderately sloped Piedmont Physiographic Province,
resulting in relatively thicker colluvial deposits in valleys. According to available excavation records
for the site, soils encountered consisted of sandy silt to silty sand.

In much of the Blue Ridge, groundwater generally occurs in pore spaces within soils and in the
structural features present in the underlying rock (i.e. joints, fractures, and faults). Recharge to the
water table is primarily by precipitation infiltrating the surficial, unsaturated soils (vadose zone) and
percolating downward under the influence of gravity to the water table (saturated zone). Typically,
the water table is not a level surface, but a subdued reflection of the land surface. The depth to the
water table is not consistent and is dependent upon several factors that include the amount of
rainfall, permeability of the soil, the extent of fracturing in the underlying rock and the influences of
groundwater pumping. Groundwater typically flows in directions perpendicular to lines of equal head
and under the influence of gravity, migrates to discharge points such as surface water features, the
toes of slopes or natural springs.

Please note that fluctuations in the depth of the water table can be expected depending on
variations in precipitation, surface water run-off and other factors not evident at the time of our
subsurface exploration. Normally, the highest levels of the water table occur in late winter and spring
and the lowest levels occur in the late summer and fall. Based on groundwater elevation
measurements taken on May 10, 2022, groundwater is estimated to flow to the southeast toward the
North Fork of the New River (Classified as Class C, Trout Waters).

Stephen’s Exxon
Creston, North Carolina
Terracon Project No. 75207132
Incident No. 16457
June 3, 2022

Responsive ■ Resourceful ■ Reliable 9
According to data collected from previous boring logs from the site, soils encountered consist of fill
material classified as sandy silt, followed by alluvial silty sands and gravel cobbles. Residual soils
encountered beneath the alluvium soils were classified as silt. Amphibolite bedrock has been
encountered at the site during the installation of deep well MW-7 at 30 feet below ground surface
(bgs).

D.2 Air Sparge Well and Recovery Well Installation

On April 19, 2022, Terracon and a North Carolina registered well driller, Environmental Drilling &
Probing Services (EDPS), mobilized to the site to install one recovery well (RW-1) and one air
sparge well (AS-1) in the vicinity of the kerosene plume on the west side of the on-site building. Prior
to field work, Terracon provided notification to North Carolina one-call and completed a private utility
mark out. The wells were installed in accordance with NCAC 2C Well Regulations.

The recovery well (RW-8) was installed using a track mounted GeoProbe 7822 using the following
methods:

◼ Installation of 10 feet of four-inch diameter, 0.020-inch machine slotted PVC well screen with
a threaded bottom cap;
◼ Installation of four-inch diameter, threaded, flush-joint PVC riser pipe to surface (0 ft bgs to 5
ft bgs);
◼ Addition of pre-sieved 20/40 grade silica sand in the annulus around the well screen from
the bottom of the boring to two feet above the top of the well screen;
◼ Addition of one foot of hydrated bentonite chips on top of the sand pack;
◼ Grout the annulus above the bentonite seal to the land surface; and
◼ Installation of a traffic-rated, flush mount protective cover in a square concrete pad.

The air sparge well (AS-1) was installed using a track mounted GeoProbe 7822 using the following
methods:

◼ Installation of three feet of two-inch diameter, 0.010-inch machine slotted PVC well screen
with a threaded bottom cap;
◼ Installation of two-inch diameter, threaded, flush-joint PVC riser pipe to surface (0 ft bgs to
13 ft bgs);
◼ Addition of pre-sieved 20/40 grade silica sand in the annulus around the well screen from
the bottom of the boring to two feet above the top of the well screen;
◼ Addition of two feet of hydrated bentonite chips on top of the sand pack;
◼ Grout the annulus above the bentonite seal to the land surface; and
◼ Installation of a traffic-rated, flush mount protective cover in a square concrete pad.

Following installation, a locking expansion plug was used to secure and seal the top of each well
casing. Drill cuttings were spread on the site. Well top of casing elevations of AS-1 and RW-1 were
Stephen’s Exxon
Creston, North Carolina
Terracon Project No. 75207132
Incident No. 16457
June 3, 2022

Responsive ■ Resourceful ■ Reliable 10
surveyed using a Topcon self-leveling laser level and MW-11 as a benchmark. The monitoring well
construction details and historical groundwater elevation data are summarized on Table 2. Field
notes are included in Appendix A. The locations of the newly installed on-site wells are depicted on
Exhibit 2 and copies of the boring logs and well construction records are included in Appendix B.

D.3 Mobile Multiphase Extraction (MMPE) and Air Sparge Event

Terracon personnel mobilized to the site on May 2, 2022 to oversee the initiation of a 96-hour MMPE
and air sparge event at wells AS-1 and RW-1 by Terracon’s subcontractor Advanced Environmental
Services (AES). Approximately 0.03 feet of LNAPL was detected in nearby well MW-11 before the
MMPE event on May 2, 2022. Depth to water in the two wells ranged from 7.40 feet bgs (RW-1) to
7.88 feet bgs (MW-11) prior to commencement of MMPE activities. According to the AES field report
dated June 1, 2022, a total of 2,670 gallons of a product/water mixture were removed from the site
and properly disposed at a certified North Carolina disposal facility. Approximately 6 gallons of free
product was recovered as liquid. Mass balance calculations indicated total VOC emissions removed
from the wells as vapor equated to 7.67 gallons. Following the event, no LNAPL was identified in
wells MW-11, AS-1 or RW-1. The AES report is provided in Appendix C.

D.4 Sampling Activities

Terracon mobilized to the site on May 10, 2022, to sample monitoring wells MW-11, MW-13, and
MW-14. Terracon gauged the monitoring wells using the electric water level meter with accuracy of
1/100th of a foot to collect groundwater elevation data in monitoring wells MW-2, MW-11, MW-12,
MW-13, MW-14, AS-1, and RW-1. Depth to groundwater in the monitoring wells ranged from
approximately 3.89 feet below top-of-casing (btoc) in well MW-2 to 8.10 feet btoc in well AS-1.
Based on top of casing elevations, groundwater flow is to the southeast. The approximate locations
of the wells are shown on the Site Diagram (Exhibit 2). A groundwater elevation map depicting
groundwater flow contours and direction is shown on Exhibit 4. Current and historical groundwater
elevation measurements are provided in Table 3.

Prior to sampling, the monitoring well was purged of a minimum of three well volumes. Purge water
from the monitoring well was disposed on-site in accordance with NCDEQ guidelines. The well was
allowed to recharge to a minimum of 90 percent of the original well volume before a sample was
collected. The groundwater samples were collected with a disposable plastic bailer. The
groundwater samples and a field blank were placed in laboratory-supplied glassware, labeled and
stored in an ice-packed cooler. The samples, along with chain-of-custody documentation, were
delivered to Pace Analytical Services, Inc. in Mount Juliet, Tennessee for analysis of VOCs by
Standard Method 6200B, including MTBE, EDB and IPE.

D.4.1 LNAPL Evaluation

Prior to the MMPE event, approximately 0.13 feet of LNAPL was detected in monitoring well MW-11
Stephen’s Exxon
Creston, North Carolina
Terracon Project No. 75207132
Incident No. 16457
June 3, 2022

Responsive ■ Resourceful ■ Reliable 11
on April 19, 2022. On May 10, 2022, LNAPL was not detected in MW-11 following the MMPE event.
However, purge water generated from monitoring well MW-11 had a strong petroleum odor and non-
measurable sheen was observed.
D.5 Analytical Results
Based on the laboratory analytical results, monitoring wells MW-11 and MW-13 reported
concentrations of contaminants above the MDLs but below the 2L Standards. Petroleum
constituents were not reported at concentrations exceeding the MDLs in MW-14.

When compared to historical groundwater data, analytical results from this sampling event indicate a
significant decrease in contaminant concentrations in MW-11 to levels below the 2L Standards.
Contaminant concentrations in MW-13 have remained stable and below the 2L Standards.
Contaminant concentrations of total xylenes, n-propylbenzene, 1,2,4-trimethylbenzene that were
historically above the 2L Standards in MW-14 were detected in this sampling event below the 2L
Standards.

The groundwater analytical results from the sampled monitoring wells and the historical groundwater
analytical results from previous sampling events are summarized in Table 4. The analytical results
are also depicted on Exhibit 5. Copies of the laboratory analytical reports are provided in Appendix
D.
E. CONCLUSIONS AND RECOMMENDATIONS
Based on information obtained during the completion of our assessment activities, Terracon
provides the following conclusions and findings.

Groundwater flow is estimated to be towards the southeast.
There are four private water supply wells (one-inactive) and five water supply springs within a
1,500-foot radius of the site. Municipal water is not available to the site or the immediately
surrounding properties.
Two additional wells, RW-1 and AS-1, were successfully installed in the vicinity of the former
kerosene UST near MW-11.
Following the 96-hour MMPE and air sparge event conducted at wells AS-1 and RW-1, a total of
2,670 gallons of a product/water mixture were removed from the site. Approximately 6 gallons of
free product was recovered as liquid. Mass balance calculations indicated total VOC emissions
removed from the wells as vapor equated to 7.67 gallons. Following the event, LNAPL was
identified in any well.
LNAPL was observed in the monitoring well MW-11 (0.13 feet) prior to the MMPE event then not
present subsequent to the MMPE event.
Stephen’s Exxon
Creston, North Carolina
Terracon Project No. 75207132
Incident No. 16457
June 3, 2022

Responsive ■ Resourceful ■ Reliable 12
Wells MW-11 and MW-13 reported concentrations of volatile organic compounds above the
MDLs but below the 2L Standards.
Petroleum constituents were not reported at concentrations exceeding the MDLs in MW-14.
Contaminants have significantly decreased in concentration in monitoring wells MW-13 and MW-
14 since the September 2021 sampling event.
Based on the data presented in this monitoring report, Terracon recommends the following activities
be completed at the site.

Considering water supply well WSW-8 is approximately 70 feet down-gradient of the kerosene
plume at the site, Terracon recommends considering seeking a water supply well abandonment
agreement for WSW-8 for closure of the well in accordance with 15A NCAC 2C rules if
permission is given by the property owner.
Conduct a sampling event to evaluate the current status of wells associated with the gasoline
UST using EPA Methods 6200 and sample the wells at the kerosene UST release area using
EPA Methods 6200 and 625 Base/ Neutrals and Acids plus 10 largest non-target peaks, MADEP
VPH, and MADEP EPH.
If results from the sampling event continue to indicate contaminant levels below GCLs, conduct a
fate and transport model to determine the potential for contaminants to migrate to nearby
receptors.

EXHIBITS
TOPOGRAPHIC MAP IMAGE COURTESY OF THE U.S. GEOLOGICAL SURVEY QUADRANGLES INCLUDE: BALDWIN GAP, NC (1/1/2003).
Topographic Map
NCDEQ 2020-2023: Stephens Exxon
Incident #: 16457
20655 North Carolina Highway 88 West
Creston, Ashe County, North Carolina
7327 W Friendly Ave Ste G
Greensboro, NC 27410-6253
75207132
DIAGRAM IS FOR GENERAL LOCATION ONLY,
AND IS NOT INTENDED FOR CONSTRUCTION
PURPOSES
Project Manager:
Drawn by:
Checked by:
Approved by:
FCD
FCD
EW
FCD
75207126
5/14/2022
Project No.
File Name:
Date:
1
Exhibit
1”=2,000’ Scale:
APPROXIMATE
SITE BOUNDARY
@A
@A@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A@A
@A
@A
&<
MW-10
MW-6MW-1MW-12
MW-15
MW-2
MW-3
MW-13MW-14
MW-11 MW-4
MW-7 MW-5R
MW-17
MW-16
MW-8
RW-1AS-1
WSW-8
EXHIBIT NO.
File Path:
Date:
PM:
Drawn By:
Checked By:
Approved By:
Project No.
Scale:
2
75207132FCD
FCD
FCD
EW 7327-G West Friendly Avenue Greensboro, NC 27410Phone: [phone] Fax: [phone]
Site Diagram
NCDEQ 2020-2023: Stephens ExxonIncident #: 1645720655 North Carolina Highway 88 WestCreston, Ashe County, North Carolina
Note: All monitoring well, water supplywell, and former UST locations havebeen approximated based on siteobservations and data received fromNCDEQ.
MW-9 location not pictured.
Legend
&<Lost Well
@A Water Supply Well
@A Monitoring Well
Former Kerosene USTFormer Gasoline UST Site BoundaryAshe County Parcel Boundary05010025Feet
As Shown
May 2022 NC HIGHWAY 88 WESTStephens Exxon FORMER JOE STEPHENSEXXON

Water Supply Well Map
7327 W Friendly Ave Ste G
Greensboro, NC 27410-6253
75207132 AERIAL PHOTOGRAPHY PROVIDED BY
MICROSOFT BING MAPS
NCDEQ 2020-2023- Stephens Exxon
Incident #: 16457
20655 North Carolina Highway 88 West
Creston, Ashe County, North Carolina
DIAGRAM IS FOR GENERAL LOCATION ONLY, AND IS NOT INTENDED FOR CONSTRUCTION PURPOSES
Project Manager:
Drawn by:
Checked by:
Approved by:
FCD
FCD
EW
FCD
Stephens
Exxon June 2022
Scale:
Project No.
File Name:
Date:
AS SHOWN 3
Exhibit
@A
@A@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A@A
@A
&<
95
92'
WSW-891'96
MW-11(92.19)MW-4(NM)
MW-10 (Lost)MW-3(NM)
MW-14(91.91)
RW-1(91.54)AS-1(91.44)
MW-7(NM)MW-2MW-2MW-1(NM)
MW-15(NM)
MW-6(NM)
MW-5R(NM)MW-16(NM)
MW-17(NM)
MW-8(NM)
MW-2(96.42)
MW-12(94.10)9692'
94 93
MW-13(92.45)
EXHIBIT NO.
File Path:
Date:
PM:
Drawn By:
Checked By:
Approved By:
Project No.
Scale:
4
75207132FCD
FCD
FCD
EW 7327-G West Friendly Avenue Greensboro, NC 27410Phone: [phone] Fax: [phone]
Groundwater Elevation Contour Map(May 2022)
NCDEQ 2020-2023: Stephens ExxonIncident #: 1645720655 North Carolina Highway 88 WestCreston, Ashe County, North Carolina
NM = Not Measured
MW-9 location (not pictured)approximated ± 500' from southeastbuilding corner.
Legend
&<Lost Well
@A Water Supply Well
@A Monitoring WellGroundwater ContourGroundwater Flow DirectionFormer Kerosene USTFormer Gasoline UST Site BoundaryAshe County Parcel Boundary05010025Feet
As Shown
May 2022 NC HIGHWAY 88 WESTStephens Exxon
@A
@A@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A@A
@A
&<
MW-10
MW-6MW-1MW-12
MW-15
MW-2
MW-3
MW-13MW-14
MW-11 MW-4
MW-7 MW-5R
MW-17
MW-16
MW-8
RW-1AS-1
WSW-8
EXHIBIT NO.
File Path:
Date:
PM:
Drawn By:
Checked By:
Approved By:
Project No.
Scale:
5
75207132FCD
FCD
FCD
EW 7327-G West Friendly Avenue Greensboro, NC 27410Phone: [phone] Fax: [phone]
Groundwater Analytical Results (May 2022)
NCDEQ 2020-2023: Stephens ExxonIncident #: 1645720655 North Carolina Highway 88 WestCreston, Ashe County, North Carolina
Note: All monitoring well, water supplywell, and former UST locations havebeen approximated based on siteobservations and data received fromNCDEQ.
MW-9 location not pictured.
Legend
&<Lost Well
@A Water Supply Well
@A Monitoring Well
Former Kerosene USTFormer Gasoline UST Site BoundaryAshe County Parcel Boundary05010025Feet
As Shown
May 2022
MW-11VOCs by 6200Bn-Butylbenzene = 1.15 μg/Lsec-Butylbenzene = 1.22 μg/L1,2,4-Trimethylbenzene = 1.22 μg/LNC HIGHWAY 88 WESTStephens Exxon FORMER JOE STEPHENSEXXONMW-13VOCs by 6200Bn-Butylbenzene = 1.98 μg/Lsec-Butylbenzene = 2.65 μg/LIsopropylbenzene = 1.09 μg/Ln-Propylbenzene = 1.07 μg/L1,2,4-Trimethylbenzene = 11.80 μg/LMW-14VOCs by 6200BAll constituents reported belowlaboratory method detection limits

TABLES
Table 1
Water Supply Well and Spring Information
Stephens Exxon
20655 US Highway 88 West
Creston, Ashe County, North Carolina
NCDEQ Incident No. 16457
Terracon Project No. 75207132
Well ID*Property Owner Property Address / Owner Mailing
Address Owner Address Use distance (ft)Direction
WSW-1 JIMMY DEAN POTTER 20473 NC HWY 88 W, CRESTON,
NC 28615
1197 FINGER BRIDGE RD
HICKORY, NC 28602
Potable Water,
Spring 1,000 East
WSW-2 MARY BELL WINEBARGER 19998 NC HWY 88 W, CRESTON,
NC 28615
1085 BRUSHY FORK RD
CRESTON, NC 28615
Potable Water,
Spring 1,300 Northeast
WSW-3 MARY BELL WINEBARGER 20410 NC HWY 88 W, CRESTON,
NC 28615
165 MEADOW RIDGE RD
BOONE, NC 28607
Potable Water,
Well 1,100 Northeast
WSW-4 CARL GRANT STEPHENS 20498 NC HWY 88 W, CRESTON,
NC 28615
20498 NC HIGHWAY 88 W, CRESTON, NC
28615
Potable Water,
Well 850 Northeast
WSW-5 EUGENE & FAYE M WARD 749 GREEN VALLEY RD,
CRESTON, NC 28615
749 GREEN VALLEY RD
CRESTON, NC 28615
Potable Water,
Spring 1,670 Northwest
WSW-6 JACK PRICE 20794 NC HWY 88 W, CRESTON,
NC 28615
20794 NC HIGHWAY 88 W
CRESTON, NC 28615
Potable Water,
Spring 600 South
WSW-7 BOB W & DARLENE J CORNETT 20871 NC HWY 88 W, CRESTON,
NC 28615
20871 NC HIGHWAY 88 W
CRESTON, NC 28615
Potable Water,
Well 950 South
WSW-8 VINCENT & COURTNEY BOCCARDY 20655 NC HWY 88 W, CRESTON,
NC 28615
420 BARLOW RD
CRESTON, NC 28615
Potable Water,
Well On-site On-site
WSW-9 STEPHENS THOMAS EARL 166 GREEN VALLEY RD,
CRESTON, NC 28615
166 GREEN VALLEY RD
CRESTON, NC 28615
Potable Water,
Spring 320 North
WSW-10 JIMMY R & SHIRLEY D SORRELL 20700 NC HWY 88 W, CRESTON,
NC 28615
7220 DENLEE RD
RALEIGH, NC 27603
Potable Water,
Spring 440 Northwest
WSW-11 ARTHUR EUGENE & TRULA WARD 239 GREEN VALLEY RD,
CRESTON, NC 28615
749 GREEN VALLEY RD
CRESTON, NC 28615
Potable Water,
Spring 1,250 Northwest
1 of 1
BenzeneTolueneEthylbenzeneTotal XylenesMethyl-tert-Butyl EtherIsopropyl EtherElthylene DibromideNapthaleneAcetonen-Butylbenzenesec-Butylbenzenetert-ButylbenzeneChloroformIsopropylbenzenen-Propylbenzene1,2,4-Trimethylbenzene1,3,5-Trimethylbenzene4-IsopropyltolueneLeadC5-C8 AlyphaticsC9-C18 AliphaticsC19-C36 AliphaticsC9-C22 Aromatics1 600 600 500 20 70 0.02 6 6000 70 70 70 70 70 70 400 400 20 15 400 700 10000 200
5000 260000 84500 85500 20000 70000 50 6000 6000000 6900 8500 15000 70000 25000 30000 28500 25000 20000 15000 NE NE NE NE
7/8/1997 ND ND ND ND 1.5 ND NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
8/11/2011
2/15/2011 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND
8/11/2011 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND NA ND ND ND ND
12/2/2011
6/22/2012 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND NA ND ND ND ND
2/15/2011 ND ND ND ND ND ND ND ND ND ND ND ND 0.71 ND ND ND ND ND 12 ND ND ND ND
8/11/2011 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND NA ND ND ND ND
12/2/2011 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND NA NA NA NA NA
6/22/2012 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND NA ND ND ND ND
1/29/2013 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND NA ND ND ND ND
10/29/2014 <0.079 <0.090 <0.092 <0.29 <0.090 <0.18 <0.089 <0.12 <4.7 <0.054 <0.084 <0.096 <0.14 <0.11 <0.094 <0.18 <0.10 <0.12 NA NA NA NA NA
8/9/2017 <0.12 <0.17 <0.13 <0.39 <0.090 <0.18 <0.15 <0.12 <4.9 <0.15 <0.13 <0.12 <0.22 <0.12 <0.13 <0.18 <0.13 <0.15 NA NA NA NA NA
3/19/2019
2/15/2011 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND
8/11/2011 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND NA ND ND ND ND
12/2/2011 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND NA NA NA NA NA
6/22/2012 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND NA NA NA NA NA
10/29/2014 <0.079 <0.090 <0.092 <0.29 <0.090 <0.18 <0.089 <0.12 <4.7 <0.054 <0.084 <0.096 <0.14 <0.11 <0.094 <0.18 <0.10 <0.12 NA NA NA NA NA
8/9/2017
3/19/2019 <0.19 <0.14 <0.13 <0.47 <0.25 <0.17 <0.19 <0.31 <3.8 <0.21 <0.19 <0.17 <0.17 <0.17 <0.13 <0.18 <0.14 <0.20 NA NA NA NA NA
12/2/2011
6/22/2012
1/19/2013
10/29/2014 <0.079 <0.090 <0.092 <0.29 <0.090 <0.18 <0.089 <0.12 <4.7 <0.054 <0.084 <0.096 <0.14 <0.11 <0.094 <0.18 <0.10 <0.12 NA NA NA NA NA
8/9/2017 <0.12 <0.17 <0.13 <0.39 <0.090 <0.18 <0.15 <0.12 <4.9 <0.15 <0.13 <0.12 <0.22 <0.12 <0.13 <0.18 <0.13 <0.15 NA NA NA NA NA
3/19/2019 <0.19 <0.14 <0.13 <0.47 <0.25 <0.17 <0.19 <0.31 <3.8 <0.21 <0.19 <0.17 <0.17 <0.17 <0.13 <0.18 <0.14 <0.20 NA NA NA NA NA
5/10/2022
Notes:
All measurements in micrograms per liter (μg/L)Bold indicates values exceeding the North Carolina 15A NCAC 02L .0202 Groundwater Standards (2L Standards)
J = Estimated value below method reporting limit Yellow indicates values exceeding the Gross Contamination Levels (GCLs)
ND = Not detected at or above the laboratory detection limit VPH AND EPH concentrations calculated using the NCDEQ Table 10 Worksheet for
NA = Not Analyzed Calculating MADEP Groundwater Sample Results using unadjusted laboratory data to determine applicable standards
NS = Not Sampled -- = Constituent not reported
LNAPL = Light Non-Aqueous Phase Liquid
Page 3 of 3
NOT SAMPLED - SITE UNOCCUPIED - COULD NOT CONTACT PROPERTY OWNER
WSW-8
Table 2
Historical Water Supply Well Analytical Results
Stephens Exxon
20655 US Highway 88 West
Creston, Ashe County, North Carolina
NCDEQ Incident No. 16457
Terracon Project No. 75207132
NOT SAMPLED
NOT SAMPLED
ND
ND
Concentrations in ug/L
2L Standard
GCL Standard
ND
Well ID Sample
Date
<0.19
<0.41
0.4
400
<0.41
NOT SAMPLED - SITE UNOCCUPIED - NO POWER
NOT SAMPLED - SITE UNOCCUPIED - NO POWER
NOT SAMPLED - SITE UNOCCUPIED - NO POWER
<0.19
ND
ND
ND
<0.19
NOT SAMPLED - OCCUPANT ABSENT 1,2-DichloroethaneWSW-1
WSW-3
WSW-6
WSW-7
ND
ND
ND
ND
ND
ND
<0.19
<0.19
NOT SAMPLED - OCCUPANT ABSENT
ND
Table 3
Monitoring Well Construction Information and Water Level Measurements Stephens Exxon
20655 US Highway 88 West
Creston, Ashe County, North Carolina
NCDEQ Incident No. 16457
Terracon Project No. 75207132
Well ID Date Installed
(m/dd/yyyy)
Well Casing
Depth (ft. BGS)
Screen Interval
(ft. BGS)
Depth of Well
(ft. BGS)
Relative Top of
Casing Elevation
Date Water
Level Measured
Depth to Water
from Top of
Casing (ft.)
LNAPL
Thickness (ft.)
Groundwater
Elevation*Comments
7/8/1997 8.49 -- 91.51
3/6/1998 8.01 -- 91.99
1/25/1999 7.87 -- 92.13
6/22/2012 6.62 -- 93.38
10/29/2014 NM -- NM
8/9/2017 NM -- NM
10/9/2019
7/8/1997 5.19 -- 95.12
3/6/1998 4.33 -- 95.98
1/25/1999 4.48 -- 95.83
4/27/2004 3.76 -- 96.55
2/14/2011 4.65 -- 95.66
10/29/2014 4.35 -- 95.96
8/9/2017 3.94 -- 96.37
3/19/2019 2.66 -- 97.65
10/9/2019 4.82 -- 95.49
5/10/2022 3.89 -- 96.42
7/8/1997 4.03 -- 96.36
3/6/1998 3.58 -- 96.81
1/25/1999 3.62 -- 96.77
4/27/2004 3.01 -- 97.38
2/15/2011 4.3 -- 96.09
12/2/2011 3.76 -- 96.63
6/22/2012 4.2 -- 96.19
1/29/2013 2.98 -- 97.41
10/29/2014 3.99 -- 96.40
8/9/2017 3.38 -- 97.01
3/19/2019 3.44 -- 96.95
10/9/2019 4.32 -- 96.07
7/8/1997 9.51 -- 90.96
3/6/1998 8.42 -- 92.05
1/25/1999 8.3 -- 92.17
4/27/2004 8.14 -- 92.33
2/15/2011 8.62 -- 91.85
8/11/2011 9.65 -- 90.82
12/2/2011 7.14 -- 93.33
6/22/2012 8.65 -- 91.82
1/29/2013 6.08 -- 94.39
10/29/2014 8.61 -- 91.86
8/9/2017 8.67 -- 91.80
3/19/2019 8.12 -- 92.35
10/9/2019 9.35 -- 91.12
7/8/1997 12.66 -- 88.91
3/6/1998 12.64 -- 88.93
1/25/1999 11.75 -- 89.82
4/27/2004 12.02 -- 89.55
2/15/2011 NM -- NM
8/11/2011 NM -- NM
12/2/2011
10/29/2014 10.69 90.88 90.88
8/9/2017 NM -- NM
8/9/2017 9.65 -- 91.44
10/9/2019 10.48 -- 90.61
9/26/2021 NM -- NM
7/8/1997 10.33 -- 88.55
3/6/1998 10.92 -- 87.96
1/25/1999 9.68 -- 89.20
9/3/2003 9.21 -- 89.67
2/15/2011 NM -- NM
8/11/2011 NM -- NM
12/2/2011
10/29/2014
8/9/2017
3/19/2019 6.18 -- 92.70
10/9/2019
7/8/1997 8.1 -- 92.94
3/6/1998 7.72 -- 93.32
1/25/1999 7.36 -- 93.68
2/15/2011 8.62 -- 92.42
10/9/2019
5.1 5.1 - 15.1 15.1 100.00 Type II
Not located
Not located
Type II
Type II
Type II
Type II
MW-3
MW-4
MW-5
3/8/1997
3/8/1997
MW-5R
MW-1 10/23/1996
3/14/2019 4 4.0-14.0 14 101.09
3 3.0-11.0 11 100.39
3/8/1997 3.9 3.9-13.9 13.9 100.47
3.6 3.6-13.6 13.6 101.57
MW-2 3/7/1997 5.3 5.3 - 15.3 15.3 100.31 Type II
MW-6 3/13/1997 2.4 2.4-13.2 13.2 98.88 Type II
Not located
Not located
Not located
Not located
MW-7 6/4/1997 41.5 41.5-46.5 46.5 101.04 Type III
Not located
1 of 2
Table 3
Monitoring Well Construction Information and Water Level Measurements Stephens Exxon
20655 US Highway 88 West
Creston, Ashe County, North Carolina
NCDEQ Incident No. 16457
Terracon Project No. 75207132
Well ID Date Installed
(m/dd/yyyy)
Well Casing
Depth (ft. BGS)
Screen Interval
(ft. BGS)
Depth of Well
(ft. BGS)
Relative Top of
Casing Elevation
Date Water
Level Measured
Depth to Water
from Top of
Casing (ft.)
LNAPL
Thickness (ft.)
Groundwater
Elevation*Comments
3/6/1998 2.57 -- 83.79
10/9/2019
3/6/1998 2.63 -- 81.50
1/25/1999 2.7 -- 81.43
2/15/2011 NM -- NM
8/11/2011 NM -- NM
12/2/2011 NM -- NM
10/29/2014 NM -- NM
8/9/2017 NM -- NM
10/9/2019
1/25/1999 6.1 -- 95.44
10/9/2019
4/27/2004 6.27 -- --
2/15/2011 11.11 1 89.43
8/8/2011 6.96 0.61 93.24
8/8/2011 9.35 0.02 90.35
8/11/2011 9.36 0.02 90.34
12/2/2011 7.94 -- 91.74
6/22/2012 8.94 0.21 90.92
1/29/2013 6.99 0.21 92.87
10/29/2014 8.76 0.76 91.57
8/9/2017 8.59 1.18 92.10
3/19/2019 7.89 0.39 92.12
10/9/2019 9.76 1.2 90.95
9/26/2021 NM 0.02 NM
4/19/2022 NM 0.13 NM
5/10/2022 7.49 -- 92.19
4/27/2004 6.17 -- 93.35
8/11/2011 7.43 -- 92.09
12/2/2011 6.19 -- 93.33
6/22/2012 4.72 -- 94.80
1/29/2013 4.49 -- 95.03
10/29/2014 6.04 -- 93.48
8/9/2017 5.47 -- 94.05
3/19/2019 3.62 -- 95.90
10/9/2019 6.2 -- 93.32
5/10/2022 5.42 -- 94.10
3/19/2019 4.85 -- 92.72
10/9/2019 6.08 -- 91.49
9/26/2021 6.3 -- 91.27
5/10/2022 5.12 -- 92.45
10/9/2019 6.11 -- 91.28
9/26/2021 5.75 -- 91.64
5/10/2022 5.48 -- 91.91
10/9/2019 7.8 -- 92.40
9/26/2021 7.65 -- 92.55
10/9/2019 0.9 -- 86.63
9/26/2021 1.25 -- 86.28
10/9/2019 1.16 -- 87.73
9/26/2021 1.66 -- 87.23
AS-1 4/19/2022 13 13.0-16.0 16 99.54 5/10/2022 8.1 -- 91.44 Air Sparge Well
RW-1 4/19/2022 5 5.0-15.0 15 99.15 5/10/2022 7.61 -- 91.54 Recovery Well
Notes:
* = If free product is present in a well, groundwater elevation is calculated by: [Top of Casing Elevation - Depth to Water] + [free product thickness x 0.8581]
BGS = below ground surface
LNAPL = Light Non-Aqueous Phase Liquid
NM = Not Measured
Not Located
MW-15
MW-16
MW-17
10/8/2019
10/8/2019
10/7/2019
MW-10 1/25/1999
100.2
Not located
Not located Type IIMW-8 3/5/1998 2.5 2.5-7.5 7.5
2.0-12.0 12 97.57
MW-14 10/7/2019 97.395.0 5.0-15.0 15
MW-9 3/5/1998 2.5 2.5-10.0 10 84.13
3.0 3.0-13.0
5.0
3.0
5.0-20.0
3.0-10.0
20
20
13
MW-11 7/14/2003 4.0 4.0-14.0 14 99.68
MW-12 7/14/2003 5.0 5.0-15.0 15 99.52
MW-13 3/14/2019 2.0
Type II
-- = Not Detected
Type II
Type II
Type II
Type II
Type II
Type II4.0 4.0-14.0 14 101.54
86.36
Type II
Type II87.53
88.89
2 of 2
BenzeneTolueneEthylbenzenTotal XylenesMethyl-tert-Butyl EtherDi-Isopropyl EtherElthylene DibromideNapthaleneAcetonen-Butylbenzenesec-Butylbenzenetert-ButylbenzeneChloroform1,2-DichloroethaneIsopropylbenzene4-Isopropylbenzenen-PropylbenzeneStyrene1,2,4-Trimethylbenzene1,3,5-TrimethylbenzeneLeadC5-C8 AlyphaticsC9-C18 AliphaticsC19-C36 AliphaticsC9-C22 Aromatics1 600 600 500 20 70 0.02 6 6000 70 70 70 70 0.4 70 20 70 70 400 400 15 400 700 10000 200500026000084500855002000070000506000600000069008500150007000040025000200003000070000285002500015000NENENENE7/8/1997 408 642 250 843 1773 370 NA NA NA NA NA NA NA 4.2 NA NA NA --NA NA 36 NA NA NA NA3/6/1998 653 1158 512 1436 614 565 NA 101 NA NA NA NA NA NA NA NA NA --NA NA NA NA NA NA NA1/25/1999 NA NA NA NA NA NA NA 66.9 NA NA NA NA NA NA NA NA NA --NA NA NA NA 3862 NA 9476/22/2012 ND ND ND ND ND 5.8 ND ND ND ND ND ND ND ND ND ND ND --ND ND NA NA NA NA NA10/29/20148/9/201710/9/20197/8/1997 ND ND ND ND ND ND NA NA NA NA NA NA NA ND NA NA NA --NA NA ND NA NA NA NA3/6/1998 ND ND ND ND ND ND NA ND NA NA NA NA NA NA NA NA NA --NA NA NA NA NA NA NA1/25/1999 NA NA NA NA NA NA NA ND NA NA NA NA NA NA NA NA NA --NA NA NA NA ND ND ND4/27/2004 ND ND ND ND ND ND NA ND NA NA NA NA NA NA NA NA NA --NA NA NA NA ND ND ND2/15/2011 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND --ND ND ND ND ND ND ND6/22/201210/29/2014 <0.079 <0.090 <0.092 <0.29 <0.090 <0.18 <0.089 <0.12 <4.7 <0.054 <0.084 <0.096 <0.14 <0.19 <0.11 <0.12 <0.094 <0.12 <0.18 <0.10 NA NA NA NA NA8/9/2017 <0.12 <0.17 <0.13 <0.39 <0.090 <0.18 <0.15 <0.12 <4.9 <0.15 <0.13 <0.12 <0.22 <0.19 <0.12 <0.15 <0.13 <0.15 <0.18 <0.13 NA NA NA NA NA3/19/2019 <0.18 <0.14 <0.13 <0.47 <0.25 <0.17 <0.19 <0.31 <3.8 <0.21 <0.16 <0.17 <0.17 <0.41 <0.17 <0.20 <0.13 <0.11 <0.18 <0.14 NA NA NA NA NA10/9/20197/8/1997 ND ND ND ND ND ND NA NA NA NA NA NA NA ND NA NA NA --NA NA ND NA NA NA NA3/6/1998 ND ND ND ND ND ND NA ND NA NA NA NA NA NA NA NA NA --NA NA NA NA NA NA NA1/25/1999 NA NA NA NA NA NA NA ND NA NA NA NA NA NA NA NA NA --NA NA NA NA ND ND ND4/27/2004 ND ND ND ND ND ND NA ND NA NA NA NA NA NA NA NA NA --NA NA NA NA ND ND ND2/15/2011 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND --ND ND 12 ND ND ND ND12/2/2011 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND --ND ND NA NA NA NA NA6/22/2012 ND ND ND ND ND ND ND ND ND ND 0.64 ND ND ND ND ND ND --ND ND NA NA NA NA NA1/29/2013 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND --0.27 J ND NA NA NA NA NA10/29/2014 <0.079 <0.090 <0.092 <0.29 <0.090 <0.18 <0.089 <0.12 10 J <0.054 <0.084 <0.096 <0.14 <0.19 <0.11 <0.12 <0.094 <0.12 <0.18 <0.10 NA NA NA NA NA8/9/2017 <0.12 <0.17 <0.13 <0.39 <0.090 <0.18 <0.15 <0.12 <4.9 <0.15 <0.13 <0.12 <0.22 <0.19 <0.12 <0.15 <0.13 <0.15 <0.18 <0.13 NA NA NA NA NA3/19/2019 <0.18 <0.14 <0.13 <0.47 <0.25 <0.17 <0.19 <0.31 <3.8 0.30 J 0.61 0.23 J <0.17 <0.41 0.48 J <0.20 <0.13 <0.11 0.55 <0.14 NA NA NA NA NA10/9/20197/8/1997 ND ND ND ND ND ND NA NA NA NA NA NA NA ND NA NA NA --NA NA ND NA NA NA NA3/6/1998 ND ND ND ND ND ND NA ND NA NA NA NA NA NA NA NA NA --NA NA NA NA NA NA NA1/25/1999 NA NA NA NA NA NA NA ND NA NA NA NA NA NA NA NA NA --NA NA NA NA 318 396 364/27/2004 ND ND ND ND ND ND NA ND NA NA NA NA NA NA NA NA NA --NA NA NA NA ND ND ND2/15/2011 ND ND ND ND ND ND ND 1.3 2.5 J 0.7 0.55 ND ND ND ND ND ND --3.6 0.8 NA ND 98 J ND 42 J8/11/2011 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND --ND ND NA ND ND ND ND12/2/2011 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND --ND ND NA NA NA NA NA6/22/2012 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND --0.27 J ND NA NA NA NA NA1/29/2013 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND --ND ND NA NA NA NA NA10/29/2014 <0.079 <0.090 <0.092 <0.29 <0.090 <0.18 <0.089 <0.12 <4.7 <0.054 <0.084 <0.096 <0.14 <0.19 <0.11 <0.12 <0.094 <0.12 <0.18 <0.10 NA NA NA NA NA8/9/2017 <0.12 <0.17 <0.13 <0.39 <0.090 <0.18 <0.15 <0.12 <4.9 <0.15 0.13 J <0.12 <0.22 <0.19 <0.12 <0.15 <0.13 <0.15 <0.18 <0.13 NA NA NA NA NA3/19/2019 <0.18 <0.14 <0.13 <0.47 <0.25 <0.17 <0.19 <0.31 7.5 J <0.21 <0.16 <0.17 <0.17 <0.41 <0.17 <0.20 <0.13 <0.11 <0.18 <0.14 NA NA NA NA NA10/9/2019Page 1 of 3
NOT SAMPLED
NOT SAMPLED
Well ID Sample
Date
NOT SAMPLED
NOT SAMPLED
MW-4
MW-3
MW-2
MW-1 COULD NOT LOCATECOULD NOT LOCATE
Table 4
Summary of Groundwater Analytical ResultsStephens Exxon
20655 US Highway 88 West
Creston, Ashe County, North Carolina
NCDEQ Incident No. 16457
Concentrations in ug/L2L StandardGCL Standard
COULD NOT LOCATE
BenzeneTolueneEthylbenzeneTotal XylenesMethyl-tert-Butyl EtherDi-Isopropyl EtherElthylene DibromideNapthaleneAcetonen-Butylbenzenesec-Butylbenzenetert-ButylbenzeneChloroform1,2-DichloroethaneIsopropylbenzene4-Isopropylbenzenen-PropylbenzeneStyrene1,2,4-Trimethylbenzene1,3,5-TrimethylbenzeneLeadC5-C8 AlyphaticsC9-C18 AliphaticsC19-C36 AliphaticsC9-C22 Aromatics1 600 600 500 20 70 0.02 6 6000 70 70 70 70 0.4 70 20 70 70 400 400 15 400 700 10000 200500026000084500855002000070000506000600000069008500150007000040025000200003000070000285002500015000NENENENE
7/8/1997 393 1016 519 1578 96.7 23 NA NA NA NA NA NA NA ND NA NA NA --NA NA ND NA NA NA NA3/6/1998 573 5162 1112 6253 232 127 NA 168 NA NA NA NA NA NA NA NA NA --NA NA NA NA NA NA NA
1/25/1999 NA NA NA NA NA NA NA 583 NA NA NA NA NA NA NA NA NA --NA NA NA NA 39091 44 68214/27/2004 243 3580 ND 6270 2299 ND NA 97.9 NA NA NA NA NA NA NA NA NA --NA NA NA 25380 11816 ND 42580
2/15/20118/11/2011
12/2/201110/29/2014 42 120 240 1140 4.4 J <3.6 <1.8 110 100 J 110 18 <1.9 4.4 J <3.9 28 17 110 16 690 230 NA NA NA NA NA
8/9/20173/19/2019 <7.2 470 2000 7600 <10 <6.8 <7.6 530 <150 350 100 <6.8 <6.8 <16 300 68 1300 51 6400 2000 NA NA NA NA NA
10/08/2019 <2.5 160 682 2360 <2.5 <2.5 <2.5 195 NA <2.5 <2.5 <2.5 <25 <2.5 93 NA <2.5 13.5 1790 543 NA NA NA NA NA
9/28/2021 ND 48 249 737 ND ND ND ND ND 16.9 9.4 ND ND ND 42 ND ND 3.93 630 186 NA NA NA NA NA7/8/1997 ND ND ND ND ND ND NA NA NA NA NA NA NA ND NA NA NA --NA NA ND NA NA NA NA
3/6/1998 ND ND ND ND 12 ND ND ND NA NA NA NA NA NA NA NA NA --NA NA NA NA NA NA NA1/25/1999 NA NA NA NA NA NA NA ND NA NA NA NA NA NA NA NA NA --NA NA NA NA 62 ND 25
2/15/20118/11/2011
12/2/201110/29/2014
8/9/20173/19/2019 <0.18 <0.14 <0.13 <0.47 1 1.3 <0.19 <0.31 <3.8 <0.21 <0.16 <0.17 <0.17 <0.41 <0.17 <0.20 <0.13 <0.11 <0.18 <0.14 NA NA NA NA NA
10/9/20197/8/1997 ND ND ND ND ND ND NA NA NA NA NA NA NA ND NA ND NA --NA NA NA NA NA NA NA
1/25/1999 NA NA NA NA NA NA NA ND NA NA NA NA NA NA NA NA NA --NA NA NA NA ND ND 442/15/2011 ND ND ND ND ND ND ND 11 ND 4.9 4 0.61 ND ND 1.1 3 2.8 --34 7.4 ND ND 3930 ND 2060
10/9/20193/6/1998 ND ND ND ND ND ND NA ND NA NA NA NA NA NA NA NA NA --NA NA NA NA NA NA NA
10/9/20193/6/1998 ND ND ND ND ND ND ND 2.7 NA NA NA NA NA NA NA NA NA --NA NA NA NA NA NA NA
1/25/1999 NA NA NA NA NA NA NA ND NA NA NA NA NA NA NA NA NA --NA NA NA NA 45 ND 292/15/2011
8/11/201112/2/2011
10/29/20148/9/2017
10/9/2019
6/22/2014 NA NA NA NA NA NA NA 6720 NA NA NA NA NA NA NA NA NA NA NA NA NA 56680 83 255610/9/2019
Page 2 of 3
MW-10 COULD NOT LOCATE
Well ID Sample
Date
MW-9
COULD NOT LOCATECOULD NOT LOCATE
COULD NOT LOCATECOULD NOT LOCATE
COULD NOT LOCATECOULD NOT LOCATE
COULD NOT LOCATE
MW-7
COULD NOT LOCATE
MW-8 COULD NOT LOCATE
COULD NOT LOCATE
COULD NOT LOCATECOULD NOT LOCATE
COULD NOT LOCATECOULD NOT LOCATE
MW-6
MW-5R
Table 4
Summary of Groundwater Analytical Results
Stephens Exxon
20655 US Highway 88 West
Creston, Ashe County, North Carolina
NCDEQ Incident No. 16457
Concentrations in ug/L2L Standard
GCL Standard
MW-5 COULD NOT LOCATE
COULD NOT LOCATECOULD NOT LOCATE
COULD NOT LOCATE
BenzeneTolueneEthylbenzenTotal XylenesMethyl-tert-Butyl EtherDi-Isopropyl EtherElthylene DibromideNapthaleneAcetonen-Butylbenzenesec-Butylbenzenetert-ButylbenzeneChloroform1,2-DichloroethaneIsopropylbenzene4-Isopropylbenzenen-PropylbenzeneStyrene1,2,4-Trimethylbenzene1,3,5-TrimethylbenzeneLeadC5-C8 AlyphaticsC9-C18 AliphaticsC19-C36 AliphaticsC9-C22 Aromatics1 600 600 500 20 70 0.02 6 6000 70 70 70 70 0.4 70 20 70 70 400 400 15 400 700 10000 200500026000084500855002000070000506000600000069008500150007000040025000200003000070000285002500015000NENENENE
4/24/2004 ND 136 ND 318 ND ND NA 180 NA NA NA NA NA NA NA NA NA --NA NA NA NA 28000 ND 114262/15/2011
8/15/201112/2/2011 ND ND ND 0.93 J ND ND ND 44 ND ND 0.58 3.2 ND ND ND 4.2 ND --190 10 NA NA NA NA NA
6/22/20121/29/2013
10/29/20148/9/2017
3/19/201910/9/2019
9/28/2021
4/19/20225/10/2022 <1.00 <1.00 <1.00 <2.00 <1.00 <1.00 <1.00 <5.00 <50.0 1.15 1.22 <1.00 <5.00 <1.00 <1.00 NA <1.00 <1.00 5.73 <1.00 NA NA NA NA NA
4/24/2004 ND ND ND ND ND 2.7 NA ND NA NA NA NA NA NA NA NA NA --NA NA NA NA NA NA NA02/15/11 ND ND ND ND 1.1 11 ND ND ND ND ND ND ND ND ND ND ND --ND ND 74 49 J ND ND ND
08/15/11 ND ND ND ND 0.84 J 6.5 ND ND ND ND ND ND ND ND ND ND ND --ND ND NA NA ND ND ND12/02/11 ND ND ND ND ND 4.5 ND ND ND ND ND ND ND ND ND ND ND --ND ND NA NA NA NA NA
06/22/12 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND --ND ND NA NA NA NA NA01/29/13 ND ND ND ND 0.30 J 3.4 ND ND ND ND ND ND ND ND ND ND ND --ND ND NA NA NA NA NA
10/29/2014 <0.079 <0.090 <0.092 <0.29 0.27 J 2.2 <0.089 <0.12 37 J <0.054 <0.084 <0.096 <0.14 <0.19 <0.11 <0.12 <0.094 <0.12 <0.18 <0.10 NA NA NA NA NA8/9/2017 <0.12 <0.17 <0.13 <0.39 <0.090 1.5 <0.15 <0.12 <4.9 <0.15 <0.13 <0.12 <0.22 <0.19 <0.12 <0.15 <0.13 <0.15 <0.18 <0.13 NA NA NA NA NA
3/19/2019 <0.18 <0.14 <0.13 <0.47 <0.25 6.2 <0.19 <0.31 9.0 J <0.21 <0.16 <0.17 <0.17 <0.41 <0.17 <0.20 <0.13 <0.11 <0.18 <0.14 NA NA NA NA NA10/9/2019
3/19/2019 <0.18 6 1.7 6.3 <0.25 <0.17 <0.19 3.7 <3.8 2.8 2.7 0.58 <0.17 <0.41 1.3 1.3 2.2 <0.11 20 1.5 NA NA NA NA NA10/08/2019 <0.25 <0.25 <0.25 <0.50 <0.25 <0.25 <2.5 2.2 NA <0.25 2.5 0.55 <2.5 <2.5 0.84 NA 0.87 <0.25 10.9 <0.25 NA NA NA NA NA
9/28/2021 ND ND ND ND ND ND ND ND ND 2 3 ND ND ND 1 ND ND ND 14 ND NA NA NA NA NA
5/10/2022 <1.00 <1.00 <1.00 <2.00 <1.00 <1.00 <1.00 <5.00 <50.0 1.98 2.65 <1.00 <5.00 <1.00 1.09 NA 1.07 <1.00 11.8 <1.00 NA NA NA NA NA
10/08/2019 <0.25 <0.25 <0.25 <0.50 <0.25 <0.25 <0.25 <1.0 NA <0.25 0.56 <0.25 <2.5 <0.25 <0.25 NA <0.25 <0.25 1 <0.25 NA NA NA NA NA9/28/2021 ND 48 309 845 ND ND ND ND ND 18 11 ND ND ND 41 ND 158 ND 797 214 NA NA NA NA NA
5/10/2022 <1.00 <1.00 <1.00 <2.00 <1.00 <1.00 <1.00 <5.00 <50.0 <1.00 <1.00 <1.00 <5.00 <1.00 <1.00 NA <1.00 <1.00 <1.00 <1.00 NA NA NA NA NA
10/08/2019 0.66 3.1 22.3 64 <0.25 <0.25 <0.25 6.1 NA 1.7 <0.25 <0.25 <2.5 <0.25 1.9 NA <0.25 <0.25 38.7 11.4 NA NA NA NA NA
9/28/2021 ND 121 788 1255 ND ND ND ND ND ND ND ND ND ND ND ND 101 ND 584 167 NA NA NA NA NA
10/09/2019 0.27J 0.41J 1.8 4.5 <0.25 <0.25 <0.25 <1.0 NA 0.71 <0.25 <0.25 <2.5 <0.25 0.44J NA 1.8 <0.25 8.9 2.6 NA NA NA NA NA
9/28/2021 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND NA NA NA NA NA
10/09/2019 3.5 14.1 210 487 <1.0 <1.0 <1.0 55.7 NA <1.0 <1.0 <1.0 <10.0 <1.0 17.2 NA 59.2 <1.0 353 74.3 NA NA NA NA NA
9/28/2021 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 2 ND NA NA NA NA NA
TW-1 7/8/1997 35.6 3.8 27.2 2.8 4 39.3 NA NA NA NA NA NA NA NA NA NA NA --NA NA NA NA NA NA NATW-2 7/8/1997 ND ND ND ND ND ND NA NA NA NA NA NA NA NA NA NA NA --NA NA NA NA NA NA NA
SW-1 10/29/2014 <0.079 <0.090 <0.092 <0.29 <0.090 <0.18 <0.089 <0.12 <4.7 <0.054 <0.084 <0.096 <0.14 <0.19 <0.11 <0.12 <0.094 <0.12 <0.18 <0.10 NA NA NA NA NANotes:
All measurements in micrograms per liter (μg/L)Bold indicates values exceeding the North Carolina 15A NCAC 02L .0202 Groundwater Standards (2L Standards)
J = Estimated value below method reporting limit Yellow indicates values exceeding the Gross Contamination Levels (GCLs)ND = Not detected at or above the laboratory detection limit VPH AND EPH concentrations calculated using the NCDEQ Table 10Worksheet for
NA = Not Analyzed Calculating MADEP Groundwater Sample Results using unadjusted laboratory data to determine applicable standards
NS = Not Sampled -- = Constituent not reportedLNAPL = Light Non-Aqueous Phase LiquidPage 3 of 3
LNAPL (0.13 ft)
GCL Standard
MW-12
MW-14
MW-13
MW-11
NOT SAMPLED
NOT SAMPLED - LNAPL (1.20 ft)
NOT SAMPLED - LNAPL (0.02 ft)
Table 4
Summary of Groundwater Analytical Results
Stephens Exxon
20655 US Highway 88 West
Creston, Ashe County, North Carolina
NCDEQ Incident No. 16457
NOT SAMPLED - LNAPL (1.18 ft)
NOT SAMPLED - LNAPL (0.39 ft)
NOT SAMPLED
NOT SAMPLED
NOT SAMPLED - LNAPL (0.21 ft)
NOT SAMPLED - LNAPL (0.21 ft)
NOT SAMPLED - LNAPL (0.76 ft)
Concentrations in ug/L2L Standard
MW-15
MW-16
MW-17
Well ID Sample
Date

APPENDIX A
FIELD NOTES

APPENDIX B
WELL LOGS AND MONITORING
WELL CONSTRUCTION
RECORDS
5.0
12.0
15.0
16.0
FILL - SANDY SILT (ML), nonplastic, brown, weak odor, moist
ALLUVIAL - SILTY SAND (SM), fine to coarse grained, nonplastic, gray, moderate odor, wet
SILTY GRAVEL (GM), wet
RESIDUAL - SILT (ML), nonplastic, brown, no odor, moist
Boring Terminated at 16 Feet
2" PVC Sch. 40with NeatCement (0.0' -9.0' bgs)
Bentonite Seal(9.0' - 11.0' bgs)
#2 Filter Sand(11.0' - 16.0'bgs)
2" PVC Sch. 400.010" slot
DEPTH
The stratification lines represent the approximate transition between differing soil types and/or rocktypes; in-situ these transitions may be gradual or may occur at different depths than shown.GRAPHIC LOGTHIS BORING LOG IS NOT VALID IF SEPARATED FROM ORIGINAL REPORT. ENVIRONMENTAL SMART LOG STEPHENS EXXON_GINT.GPJ TERRACON_DATATEMPLATE.GDT 5/11/22 20655 Highway 88 West
Creston, NC
SITE:
Page 1 of 1
Advancement Method:Hollow Stem Auger
Abandonment Method:
Notes:
Project No.: 75207132
Drill Rig: Geoprobe 7822DT
Well Started: 04-16-2022
WELL LOG NO. AS-1
NCDEQ
Driller: J. Pahless
Well Completed: 04-16-2022
CLIENT:PROJECT: Stephens Exxon
MATERIAL DESCRIPTION DEPTH (ft)5
10
15 WATER LEVELOBSERVATIONSSAMPLE TYPEWell Completion:Surface Mount
INSTALLATION DETAILS
After completion of drilling (4/16/22)
Prior to sampling event (5/10/22)
WATER LEVEL OBSERVATIONS
5.0
12.0
14.5
15.0
FILL - SANDY SILT (ML), nonplastic, brown, weak odor, moist
ALLUVIAL - SILTY SAND (SM), fine to coarse grained, nonplastic, gray, weak odor, wet
SILTY GRAVEL (GM), wet
RESIDUAL - SILT (ML), nonplastic, brown, no odor, moist
Boring Terminated at 15 Feet
4" PVC Sch. 40with NeatCement (0.0' -2.0' bgs)
Bentonite Seal(2.0' - 3.0' bgs)
#3 Coarse FilterSand (3.0' -15.0' bgs)4" PVC Sch. 400.020" slot
DEPTH
The stratification lines represent the approximate transition between differing soil types and/or rocktypes; in-situ these transitions may be gradual or may occur at different depths than shown.GRAPHIC LOGTHIS BORING LOG IS NOT VALID IF SEPARATED FROM ORIGINAL REPORT. ENVIRONMENTAL SMART LOG STEPHENS EXXON_GINT.GPJ TERRACON_DATATEMPLATE.GDT 5/11/22 20655 Highway 88 West
Creston, NC
SITE:
Page 1 of 1
Advancement Method:Hollow Stem Auger Notes:
Project No.: 75207132
Drill Rig: Geoprobe 7822DT
Well Started: 04-16-2022
WELL LOG NO. RW-1
NCDEQ
Driller: J. Pahless
Well Completed: 04-16-2022
CLIENT:PROJECT: Stephens Exxon
MATERIAL DESCRIPTION DEPTH (ft)5
10
15 WATER LEVELOBSERVATIONSSAMPLE TYPEWell Completion:Surface Mount
INSTALLATION DETAILS
After completion of drilling (4/16/22)
Prior to sampling event (5/10/22)
WATER LEVEL OBSERVATIONS

APPENDIX C
MOBILE MULTI-PHASE EXTRACTION
EVENT REPORT

ADVANCED
ENVIRONMENTAL SERVICES, INC.
“Your Environmental Solutions Partner”

MOBILE
MULTI-PHASE
EXTRACTION REPORT

Site Location:

Stephens Exxon
20655 NC Hwy 88 West
Creston, NC

Prepared for:

Terracon
7327-G West Friendly Avenue
Greensboro, NC 27410
PM – Chris Driscoll, PG

June 1, 2022

TABLE OF CONTENTS

EVENT SUMMARY

MMPE FIELD LOG

MASS-REMOVAL CALCULATION

FIELD NOTES

DISPOSAL MANIFESTS

MOBILE MULTI-PHASE EXTRACTION
EVENT SUMMARY

June 1, 2022

Location: Stephens Exxon
20655 NC Hwy 88 West
Creston, NC

Client:
Terracon
7327-G West Friendly Avenue
Greensboro, NC 27410
PM – Chris Driscoll, PG

Event Dates: May 2 – 6, 2022
Advanced Job # 05 - 2234

Advanced Personnel: Scott Crook and Gary McDaniel

MMPE System: MMPE system rated 280 CFM at 25” hg
8’ discharge stack - 6” diameter
6,000 - gallon tanker
50’ piping 2.0” hose to 2 wells

Extraction Well: MW-11 and RW-1

Well Initial FP / WL(ft) Final FP / WL(ft) Stinger depth(ft) Run Time
/ Changed To
MW-11 7.85/7.88 11.92 8/10/12 96.0 hours
RW-1 7.40 14.48 8/10/12 96.0 hours

Description of Event:
The MMPE event ran from 13:10 May 2, through 13:10 May 6, 2022. The MMPE system was
active for 96.0 hours. During the event vacuum at the recovery pump ranged from 22.0 to 23.0
inches of mercury (hg) and stabilized at approximately 22.0 inches of mercury. Airflow rates
ranged from 1,200 to 1,250 feet per minute and stabilized at approximately 1,250 feet per
minute. System temperature ranged from 112.0 – 124.0 degrees F and humidity ranged from 56.0
to 68.0 percent. Field gauged volatile organic compounds (VOC’s) decreased from 2.400
parts per-million (PPM) to 600 (PPM) throughout the event.

Groundwater / Product Mix Recovered:
During the event a total of 2,670 gallons of product/water mix were removed from the site and
properly disposed at a certified North Carolina disposal facility. Approximately 6 gallons of free
product was recovered as liquid. Total fluids recovered, was measured based on stick readings
conducted during and following the event. Based on 96.0 hours of operation and a total of 2,670
gallons recovered, the average groundwater recovery rate was calculated to be approximately
27.81 gallons per hour.

Events Results:
Based on mass-removal calculations 47.17 pounds or 7.67 gallons of VOC’s were removed as
vapor. Following the event, no free product was identified in any well.
MMPE FIELD LOG:
CLIENT: Terracon
JOB NAME: Stephens Exxon
LOCATION: Creston, NC
MMPE EVENT DATES: May 2 - 6, 2022
EXTRACTION POINTS: MW-11 & RW-1
AES JOB NUMBER: 05 - 2234
DATE TIME FLOW (f/m) HUM.(%) TEMP. (F)VOC's(ppm)VAC. (hg")GALLONS STINGER/WL's EXTRACTION POINTS (hg")
MW-11 RW-1
Start 13:10 Stinger(ft)8,10,12 8,10,12
Initial WL's 7.85/7.88 7.40
05/02/22 14:00 1,200 70 112 2,400 23.0 21.0 21.0
14:50 1,200 64 118 2,200 23.0 21.0 21.0
17:20 1,200 58 124 1,200 23.0 21.0 21.0
18:00 1,200 58 124 1,200 23.0 21.0 21.0
05/03/22 8:10 1,250 58 122 1,000 22.0 510 gal.20.0 20.0
10:10 1,200 58 122 1,000 23.0 21.0 21.0
14:30 1,200 56 124 1,000 23.0 21.0 21.0
16:30 1,200 56 124 1,000 23.0 21.0 21.0
05/04/22 8:40 1,250 60 120 800 22.0 1,185 gal.20.0 20.0
10:40 1,200 58 122 800 23.0 21.0 21.0
15:00 1,200 56 124 800 23.0 21.0 21.0
17:00 1,200 56 124 800 23.0 21.0 21.0
05/05/22 9:00 1,250 58 122 700 22.0 1,875 gal. 20.0 20.0
11:00 1,250 58 122 700 22.0 20.0 20.0
14:30 1,250 58 122 700 22.0 20.0 20.0
16:30 1,250 58 122 700 22.0 20.0 20.0
05/06/22 10:50 1,250 56 124 600 22.0 2,565 gal. 20.0 20.0
12:20 1,250 58 122 600 22.0 20.0 20.0

END 13:10 Total fluids: 2,670 gals.Final WL's 11.92 14.48
Total free product:6 gal.
DATE TIME STINGER/WL's Air Sparge Vacuum Influence Well Gauging (ft)
AS-1 AS-1
Start 13:10 (feet)7.74

CFM PSI
05/02/22 14:00 N/A N/A
14:50 3.0 22.0
17:20 3.2 20.0
18:00 3.2 20.0
05/03/22 8:10 3.2 20.0
10:10 3.2 20.0
14:30 3.2 20.0
16:30 3.2 20.0
05/04/22 8:40 3.2 20.0
10:40 3.2 20.0
15:00 3.2 20.0
17:00 3.2 20.0
05/05/22 9:00 3.2 20.0
11:00 3.2 20.0
14:30 3.2 20.0
16:30 3.2 20.0
05/06/22 10:50 3.2 20.0
12:20 3.2 20.0

END 12:30 Final W/L Dry-16.37 DTB
Page 1 of 1
MOBILE MULTI-PHASE EXTRACTION EVENT
SITE NAME: Stephens Exxon CLIENT: Terracon
INCIDENT NUMBER:
AVERAGE DEPTH TO GROUNDWATER: 7 - 8 feet
DESCRIBE SOIL IN THE SATURATED ZONE:
AVERAGE HYDRAULIC CONDUCTIVITY (if known):
EXTRACTION WELLS USED FOR MMPE: MW-11 and RW-1
SPECIFICATIONS OF THE MMPE SYSTEM (cfm @ in Hg): 280 cfm @ 25.0"Hg
DRY STANDARD CUBIC FEET PER MINUTE (DSCFM) AIR FLOW CALCULATIONS (Qstd)
Date Hours Vacuum Velocity Pipe ID Temp Rel Humid Water Water Qstd(inches of Hg)(ft/min)(in)(°F)(%)Vapor (Wt%)Vapor (Vol%)(flow)
5/2/22 24.00 23.00 1200.00 6 120 62.5 0.047 0.070 200
5/3/22 48.00 22.75 1213.00 6 123 57.0 0.047 0.070 201
5/4/22 72.00 22.75 1213.00 6 123 57.5 0.047 0.070 201
5/5/22 96.00 22.00 1250.00 6 123 57.3 0.047 0.070 207
5/6/22
NOTES
Qstd = Flow at DSCFM
Vacuum = The level of vacuum being applied should be recorded from the MMPE system (inches of Hg)
Velocity = The rate at which air flows is measured at the blower discharge piping (anemometer or pitot tube)
Pipe ID = The inside diameter of the blower discharge piping (from the MMPE system)
Temperature = The temperature of the air stream exiting the blower discharge piping (dry bulb temp., in deg.°F)
Relative humidity = The % relative humidity of the air stream exiting the blower discharge piping
Bwsw = water vapor % by weight, i.e., pounds of water per pound of dry air, derived from the Psychrometric chart (temp Vs relative humidity)
Bws = water vapor % by volume
EQUATIONS
Bws = (Bwsw/18 lb-mole H20)/[(1/28.84 lb-mole dry air) + (Bwsw/18 lb-mole H2O)]
Qstd = (1-Water Vapor) * velocity * (PI * (diameter/24)2) * (528°R/(Temp + 460))
EMISSION CALCULATIONS
Elapsed
Time Flow PPMmeasured PPMwet PPMdry K PPMconc Cc:m Cc PMRc PMRg PMR
(hour)(DSCFM)(ppm)(#C - gas)(mg/dsm3)(lb/dscf)(lb/hour)(lb/hour)(lb)
24 200 1750 1750 1882 1 1882 939 5.86178E-05 0.70 0.81 19.50
48 201 1000 1000 1075 1 1075 537 3.34959E-05 0.40 0.47 11.20
72 201 800 800 860 1 860 429 2.67967E-05 0.32 0.37 8.97
96 207 650 650 699 1 699 349 2.17723E-05 0.27 0.31 7.51
Total emissions in pounds 47.17
Total emissions as gallons (pounds / 6.152)7.67
NOTES
PPMmeasured = Actual measurements (ppm) taken with a OVA or TVA at the blower discharge piping
PPMwet = "wet" concentration
PPMdry = "dry" concentration
K = Number of carbons in calibration gas: (Methane K = 1, or Propane K = 3, or Hexane K = 6)
PPMc= PPMv, Volumetric concentration of VOC emissions as carbon, dry basis at STP
Cc:m = mg/dsm3, mass concentration of VOC emissions as carbon
Mc = 12.01 mg/mg-mole, molecular weight of carbon
K3 = 24.07 dsm3/106 mg-mole, mass to volume conversion factor at STP
Cc = lb/dcsf, mass concentration of VOC emissions as carbon, dry basis at STP
PMRc = lb/hr, pollutant mass removal rate of VOC's as carbon
PMRg = lb/hr, pollutant mass removal rate of of VOC's as gasoline
PMR = lb, pollutant mass removal of VOC's as gasoline
EQUATIONS
PPMwet = PPMmeasuredPPMdry = (PPMwet)/(1-Bws)
PPMc = (PPMd)(K)
Cc:m = (PPMc)(Mc / K3)
Cc = (Cc:m)(62.43x10-9 lb-m3/mg-ft3)
PMRc = (Cc)(Qstd)(60 minute/hour)
PMRg = (PMRc)(Mg/Mcg)
PMR = (PMRg)(#hours)
MMP& Field Log· -Went: / c::g.~AQ.or--;) Ell/ v',
SiteName: c~~fb ('-j ~ITE
Em-action Wells: fV) LL> -I I I w -\
S --
JobNumber:
Event Dates:
og_ z.,4'-1 ~/2. -&jfQ /Zc

APPENDIX D
LABORATORY ANALYTICAL RESULTS AND
CHAIN-OF-CUSTODY FORMS

ANALYTICAL REPORT
May 18, 2022
Terracon - Greensboro, NC
Sample Delivery Group:L1492874
Samples Received:05/11/2022
Project Number:75207132
Description:Stephens Exxon
Report To:Chris Driscoll
7327-G, West Friendly Ave
Greensboro, NC 27410
Entire Report Reviewed By:
May 18, 2022
[Preliminary Report]
Heather J Wagner
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:
Terracon - Greensboro, NC 75207132 L1492874 05/18/22 08:15 1 of 23
May 18, 2022
Heather J Wagner
Project Manager
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207132 L1492874 05/18/22 08:56 1 of 23
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-11 L1492874-01 5
MW-13 L1492874-02 7
MW-14 L1492874-03 9
FB-1 L1492874-04 11
Qc: Quality Control Summary 13
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 13
Gl: Glossary of Terms 21
Al: Accreditations & Locations 22
Sc: Sample Chain of Custody 23
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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SAMPLE SUMMARY
Collected by Collected date/time Received date/time
MW-11 L1492874-01 GW Dylan Edwards 05/10/22 12:30 05/11/22 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1863853 1 05/15/22 19:26 05/15/22 19:26 ACG Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-13 L1492874-02 GW Dylan Edwards 05/10/22 14:00 05/11/22 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1863853 1 05/15/22 19:48 05/15/22 19:48 ACG Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1865229 1 05/17/22 22:10 05/17/22 22:10 BMB Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-14 L1492874-03 GW Dylan Edwards 05/10/22 13:10 05/11/22 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1865229 1 05/17/22 22:31 05/17/22 22:31 BMB Mt. Juliet, TN
Collected by Collected date/time Received date/time
FB-1 L1492874-04 GW Dylan Edwards 05/10/22 14:20 05/11/22 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1863853 1 05/15/22 20:10 05/15/22 20:10 ACG Mt. Juliet, TN
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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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]
Heather J Wagner
Project Manager
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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Heather J Wagner
Project Manager
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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SAMPLE RESULTS - 01
L1492874
MW-11
Collected date/time: 05/10/22 12:30
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 05/15/2022 19:26 WG1863853
Acrolein ND 50.0 1 05/15/2022 19:26 WG1863853
Acrylonitrile ND 10.0 1 05/15/2022 19:26 WG1863853
Benzene ND 1.00 1 05/15/2022 19:26 WG1863853
Bromobenzene ND 1.00 1 05/15/2022 19:26 WG1863853
Bromodichloromethane ND 1.00 1 05/15/2022 19:26 WG1863853
Bromoform ND 1.00 1 05/15/2022 19:26 WG1863853
Bromomethane ND 5.00 1 05/15/2022 19:26 WG1863853
n-Butylbenzene 1.15 1.00 1 05/15/2022 19:26 WG1863853
sec-Butylbenzene 1.22 1.00 1 05/15/2022 19:26 WG1863853
tert-Butylbenzene ND 1.00 1 05/15/2022 19:26 WG1863853
Carbon tetrachloride ND 1.00 1 05/15/2022 19:26 WG1863853
Chlorobenzene ND 1.00 1 05/15/2022 19:26 WG1863853
Chlorodibromomethane ND 1.00 1 05/15/2022 19:26 WG1863853
Chloroethane ND 5.00 1 05/15/2022 19:26 WG1863853
Chloroform ND 5.00 1 05/15/2022 19:26 WG1863853
Chloromethane ND 2.50 1 05/15/2022 19:26 WG1863853
2-Chlorotoluene ND 1.00 1 05/15/2022 19:26 WG1863853
4-Chlorotoluene ND 1.00 1 05/15/2022 19:26 WG1863853
1,2-Dibromo-3-Chloropropane ND 5.00 1 05/15/2022 19:26 WG1863853
1,2-Dibromoethane ND 1.00 1 05/15/2022 19:26 WG1863853
Dibromomethane ND 1.00 1 05/15/2022 19:26 WG1863853
1,2-Dichlorobenzene ND 1.00 1 05/15/2022 19:26 WG1863853
1,3-Dichlorobenzene ND 1.00 1 05/15/2022 19:26 WG1863853
1,4-Dichlorobenzene ND 1.00 1 05/15/2022 19:26 WG1863853
Dichlorodifluoromethane ND 5.00 1 05/15/2022 19:26 WG1863853
1,1-Dichloroethane ND 1.00 1 05/15/2022 19:26 WG1863853
1,2-Dichloroethane ND 1.00 1 05/15/2022 19:26 WG1863853
1,1-Dichloroethene ND 1.00 1 05/15/2022 19:26 WG1863853
cis-1,2-Dichloroethene ND 1.00 1 05/15/2022 19:26 WG1863853
trans-1,2-Dichloroethene ND 1.00 1 05/15/2022 19:26 WG1863853
1,2-Dichloropropane ND 1.00 1 05/15/2022 19:26 WG1863853
1,1-Dichloropropene ND 1.00 1 05/15/2022 19:26 WG1863853
1,3-Dichloropropane ND 1.00 1 05/15/2022 19:26 WG1863853
2,2-Dichloropropane ND 1.00 1 05/15/2022 19:26 WG1863853
Di-isopropyl ether ND 1.00 1 05/15/2022 19:26 WG1863853
Ethylbenzene ND 1.00 1 05/15/2022 19:26 WG1863853
Hexachloro-1,3-butadiene ND 1.00 1 05/15/2022 19:26 WG1863853
Isopropylbenzene ND 1.00 1 05/15/2022 19:26 WG1863853
p-Isopropyltoluene ND 1.00 1 05/15/2022 19:26 WG1863853
2-Butanone (MEK)ND 10.0 1 05/15/2022 19:26 WG1863853
Methylene Chloride ND 5.00 1 05/15/2022 19:26 WG1863853
4-Methyl-2-pentanone (MIBK)ND 10.0 1 05/15/2022 19:26 WG1863853
Methyl tert-butyl ether ND 1.00 1 05/15/2022 19:26 WG1863853
Naphthalene ND 5.00 1 05/15/2022 19:26 WG1863853
n-Propylbenzene ND 1.00 1 05/15/2022 19:26 WG1863853
Styrene ND 1.00 1 05/15/2022 19:26 WG1863853
1,1,1,2-Tetrachloroethane ND 1.00 1 05/15/2022 19:26 WG1863853
1,1,2,2-Tetrachloroethane ND 1.00 1 05/15/2022 19:26 WG1863853
Tetrachloroethene ND 1.00 1 05/15/2022 19:26 WG1863853
Toluene ND 1.00 1 05/15/2022 19:26 WG1863853
1,2,3-Trichlorobenzene ND 1.00 1 05/15/2022 19:26 WG1863853
1,2,4-Trichlorobenzene ND 1.00 1 05/15/2022 19:26 WG1863853
1,1,1-Trichloroethane ND 1.00 1 05/15/2022 19:26 WG1863853
1,1,2-Trichloroethane ND 1.00 1 05/15/2022 19:26 WG1863853
Trichloroethene ND J4 1.00 1 05/15/2022 19:26 WG1863853
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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SAMPLE RESULTS - 01
L1492874
MW-11
Collected date/time: 05/10/22 12:30
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Trichlorofluoromethane ND 5.00 1 05/15/2022 19:26 WG1863853
1,2,3-Trichloropropane ND 2.50 1 05/15/2022 19:26 WG1863853
1,2,4-Trimethylbenzene 5.73 1.00 1 05/15/2022 19:26 WG1863853
1,3,5-Trimethylbenzene ND 1.00 1 05/15/2022 19:26 WG1863853
Vinyl chloride ND 1.00 1 05/15/2022 19:26 WG1863853
o-Xylene ND 1.00 1 05/15/2022 19:26 WG1863853
m&p-Xylenes ND 2.00 1 05/15/2022 19:26 WG1863853
(S) Toluene-d8 105 80.0-120 05/15/2022 19:26 WG1863853
(S) 4-Bromofluorobenzene 109 77.0-126 05/15/2022 19:26 WG1863853
(S) 1,2-Dichloroethane-d4 84.9 70.0-130 05/15/2022 19:26 WG1863853
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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SAMPLE RESULTS - 02
L1492874
MW-13
Collected date/time: 05/10/22 14:00
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 05/15/2022 19:48 WG1863853
Acrolein ND 50.0 1 05/15/2022 19:48 WG1863853
Acrylonitrile ND 10.0 1 05/15/2022 19:48 WG1863853
Benzene ND 1.00 1 05/15/2022 19:48 WG1863853
Bromobenzene ND 1.00 1 05/17/2022 22:10 WG1865229
Bromodichloromethane ND 1.00 1 05/15/2022 19:48 WG1863853
Bromoform ND 1.00 1 05/15/2022 19:48 WG1863853
Bromomethane ND 5.00 1 05/15/2022 19:48 WG1863853
n-Butylbenzene 1.98 1.00 1 05/17/2022 22:10 WG1865229
sec-Butylbenzene 2.65 1.00 1 05/17/2022 22:10 WG1865229
tert-Butylbenzene ND 1.00 1 05/17/2022 22:10 WG1865229
Carbon tetrachloride ND 1.00 1 05/15/2022 19:48 WG1863853
Chlorobenzene ND 1.00 1 05/15/2022 19:48 WG1863853
Chlorodibromomethane ND 1.00 1 05/15/2022 19:48 WG1863853
Chloroethane ND 5.00 1 05/15/2022 19:48 WG1863853
Chloroform ND 5.00 1 05/15/2022 19:48 WG1863853
Chloromethane ND 2.50 1 05/15/2022 19:48 WG1863853
2-Chlorotoluene ND 1.00 1 05/17/2022 22:10 WG1865229
4-Chlorotoluene ND 1.00 1 05/17/2022 22:10 WG1865229
1,2-Dibromo-3-Chloropropane ND 5.00 1 05/17/2022 22:10 WG1865229
1,2-Dibromoethane ND 1.00 1 05/15/2022 19:48 WG1863853
Dibromomethane ND 1.00 1 05/15/2022 19:48 WG1863853
1,2-Dichlorobenzene ND 1.00 1 05/17/2022 22:10 WG1865229
1,3-Dichlorobenzene ND 1.00 1 05/17/2022 22:10 WG1865229
1,4-Dichlorobenzene ND 1.00 1 05/17/2022 22:10 WG1865229
Dichlorodifluoromethane ND 5.00 1 05/15/2022 19:48 WG1863853
1,1-Dichloroethane ND 1.00 1 05/15/2022 19:48 WG1863853
1,2-Dichloroethane ND 1.00 1 05/15/2022 19:48 WG1863853
1,1-Dichloroethene ND 1.00 1 05/15/2022 19:48 WG1863853
cis-1,2-Dichloroethene ND 1.00 1 05/15/2022 19:48 WG1863853
trans-1,2-Dichloroethene ND 1.00 1 05/15/2022 19:48 WG1863853
1,2-Dichloropropane ND 1.00 1 05/15/2022 19:48 WG1863853
1,1-Dichloropropene ND 1.00 1 05/15/2022 19:48 WG1863853
1,3-Dichloropropane ND 1.00 1 05/15/2022 19:48 WG1863853
2,2-Dichloropropane ND 1.00 1 05/15/2022 19:48 WG1863853
Di-isopropyl ether ND 1.00 1 05/15/2022 19:48 WG1863853
Ethylbenzene ND 1.00 1 05/15/2022 19:48 WG1863853
Hexachloro-1,3-butadiene ND 1.00 1 05/17/2022 22:10 WG1865229
Isopropylbenzene 1.09 1.00 1 05/15/2022 19:48 WG1863853
p-Isopropyltoluene ND 1.00 1 05/17/2022 22:10 WG1865229
2-Butanone (MEK)ND 10.0 1 05/15/2022 19:48 WG1863853
Methylene Chloride ND 5.00 1 05/15/2022 19:48 WG1863853
4-Methyl-2-pentanone (MIBK)ND 10.0 1 05/15/2022 19:48 WG1863853
Methyl tert-butyl ether ND 1.00 1 05/15/2022 19:48 WG1863853
Naphthalene ND 5.00 1 05/17/2022 22:10 WG1865229
n-Propylbenzene 1.07 1.00 1 05/17/2022 22:10 WG1865229
Styrene ND 1.00 1 05/15/2022 19:48 WG1863853
1,1,1,2-Tetrachloroethane ND 1.00 1 05/15/2022 19:48 WG1863853
1,1,2,2-Tetrachloroethane ND 1.00 1 05/17/2022 22:10 WG1865229
Tetrachloroethene ND 1.00 1 05/15/2022 19:48 WG1863853
Toluene ND 1.00 1 05/15/2022 19:48 WG1863853
1,2,3-Trichlorobenzene ND 1.00 1 05/17/2022 22:10 WG1865229
1,2,4-Trichlorobenzene ND 1.00 1 05/17/2022 22:10 WG1865229
1,1,1-Trichloroethane ND 1.00 1 05/15/2022 19:48 WG1863853
1,1,2-Trichloroethane ND 1.00 1 05/15/2022 19:48 WG1863853
Trichloroethene ND J4 1.00 1 05/15/2022 19:48 WG1863853
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207132 L1492874 05/18/22 08:15 7 of 23
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207132 L1492874 05/18/22 08:56 7 of 23
SAMPLE RESULTS - 02
L1492874
MW-13
Collected date/time: 05/10/22 14:00
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Trichlorofluoromethane ND 5.00 1 05/15/2022 19:48 WG1863853
1,2,3-Trichloropropane ND 2.50 1 05/17/2022 22:10 WG1865229
1,2,4-Trimethylbenzene 11.8 1.00 1 05/17/2022 22:10 WG1865229
1,3,5-Trimethylbenzene ND 1.00 1 05/17/2022 22:10 WG1865229
Vinyl chloride ND 1.00 1 05/15/2022 19:48 WG1863853
o-Xylene ND 1.00 1 05/15/2022 19:48 WG1863853
m&p-Xylenes ND 2.00 1 05/15/2022 19:48 WG1863853
(S) Toluene-d8 105 80.0-120 05/15/2022 19:48 WG1863853
(S) Toluene-d8 101 80.0-120 05/17/2022 22:10 WG1865229
(S) 4-Bromofluorobenzene 114 77.0-126 05/15/2022 19:48 WG1863853
(S) 4-Bromofluorobenzene 108 77.0-126 05/17/2022 22:10 WG1865229
(S) 1,2-Dichloroethane-d4 91.3 70.0-130 05/15/2022 19:48 WG1863853
(S) 1,2-Dichloroethane-d4 90.5 70.0-130 05/17/2022 22:10 WG1865229
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207132 L1492874 05/18/22 08:56 8 of 23
SAMPLE RESULTS - 03
L1492874
MW-14
Collected date/time: 05/10/22 13:10
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 05/17/2022 22:31 WG1865229
Acrolein ND 50.0 1 05/17/2022 22:31 WG1865229
Acrylonitrile ND 10.0 1 05/17/2022 22:31 WG1865229
Benzene ND 1.00 1 05/17/2022 22:31 WG1865229
Bromobenzene ND 1.00 1 05/17/2022 22:31 WG1865229
Bromodichloromethane ND 1.00 1 05/17/2022 22:31 WG1865229
Bromoform ND 1.00 1 05/17/2022 22:31 WG1865229
Bromomethane ND 5.00 1 05/17/2022 22:31 WG1865229
n-Butylbenzene ND 1.00 1 05/17/2022 22:31 WG1865229
sec-Butylbenzene ND 1.00 1 05/17/2022 22:31 WG1865229
tert-Butylbenzene ND 1.00 1 05/17/2022 22:31 WG1865229
Carbon tetrachloride ND 1.00 1 05/17/2022 22:31 WG1865229
Chlorobenzene ND 1.00 1 05/17/2022 22:31 WG1865229
Chlorodibromomethane ND 1.00 1 05/17/2022 22:31 WG1865229
Chloroethane ND 5.00 1 05/17/2022 22:31 WG1865229
Chloroform ND 5.00 1 05/17/2022 22:31 WG1865229
Chloromethane ND 2.50 1 05/17/2022 22:31 WG1865229
2-Chlorotoluene ND 1.00 1 05/17/2022 22:31 WG1865229
4-Chlorotoluene ND 1.00 1 05/17/2022 22:31 WG1865229
1,2-Dibromo-3-Chloropropane ND 5.00 1 05/17/2022 22:31 WG1865229
1,2-Dibromoethane ND 1.00 1 05/17/2022 22:31 WG1865229
Dibromomethane ND 1.00 1 05/17/2022 22:31 WG1865229
1,2-Dichlorobenzene ND 1.00 1 05/17/2022 22:31 WG1865229
1,3-Dichlorobenzene ND 1.00 1 05/17/2022 22:31 WG1865229
1,4-Dichlorobenzene ND 1.00 1 05/17/2022 22:31 WG1865229
Dichlorodifluoromethane ND 5.00 1 05/17/2022 22:31 WG1865229
1,1-Dichloroethane ND 1.00 1 05/17/2022 22:31 WG1865229
1,2-Dichloroethane ND 1.00 1 05/17/2022 22:31 WG1865229
1,1-Dichloroethene ND 1.00 1 05/17/2022 22:31 WG1865229
cis-1,2-Dichloroethene ND 1.00 1 05/17/2022 22:31 WG1865229
trans-1,2-Dichloroethene ND 1.00 1 05/17/2022 22:31 WG1865229
1,2-Dichloropropane ND 1.00 1 05/17/2022 22:31 WG1865229
1,1-Dichloropropene ND 1.00 1 05/17/2022 22:31 WG1865229
1,3-Dichloropropane ND 1.00 1 05/17/2022 22:31 WG1865229
2,2-Dichloropropane ND 1.00 1 05/17/2022 22:31 WG1865229
Di-isopropyl ether ND 1.00 1 05/17/2022 22:31 WG1865229
Ethylbenzene ND 1.00 1 05/17/2022 22:31 WG1865229
Hexachloro-1,3-butadiene ND 1.00 1 05/17/2022 22:31 WG1865229
Isopropylbenzene ND 1.00 1 05/17/2022 22:31 WG1865229
p-Isopropyltoluene ND 1.00 1 05/17/2022 22:31 WG1865229
2-Butanone (MEK)ND 10.0 1 05/17/2022 22:31 WG1865229
Methylene Chloride ND 5.00 1 05/17/2022 22:31 WG1865229
4-Methyl-2-pentanone (MIBK)ND 10.0 1 05/17/2022 22:31 WG1865229
Methyl tert-butyl ether ND 1.00 1 05/17/2022 22:31 WG1865229
Naphthalene ND 5.00 1 05/17/2022 22:31 WG1865229
n-Propylbenzene ND 1.00 1 05/17/2022 22:31 WG1865229
Styrene ND 1.00 1 05/17/2022 22:31 WG1865229
1,1,1,2-Tetrachloroethane ND 1.00 1 05/17/2022 22:31 WG1865229
1,1,2,2-Tetrachloroethane ND 1.00 1 05/17/2022 22:31 WG1865229
Tetrachloroethene ND 1.00 1 05/17/2022 22:31 WG1865229
Toluene ND 1.00 1 05/17/2022 22:31 WG1865229
1,2,3-Trichlorobenzene ND 1.00 1 05/17/2022 22:31 WG1865229
1,2,4-Trichlorobenzene ND 1.00 1 05/17/2022 22:31 WG1865229
1,1,1-Trichloroethane ND 1.00 1 05/17/2022 22:31 WG1865229
1,1,2-Trichloroethane ND 1.00 1 05/17/2022 22:31 WG1865229
Trichloroethene ND 1.00 1 05/17/2022 22:31 WG1865229
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207132 L1492874 05/18/22 08:15 9 of 23
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207132 L1492874 05/18/22 08:56 9 of 23
SAMPLE RESULTS - 03
L1492874
MW-14
Collected date/time: 05/10/22 13:10
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Trichlorofluoromethane ND 5.00 1 05/17/2022 22:31 WG1865229
1,2,3-Trichloropropane ND 2.50 1 05/17/2022 22:31 WG1865229
1,2,4-Trimethylbenzene ND 1.00 1 05/17/2022 22:31 WG1865229
1,3,5-Trimethylbenzene ND 1.00 1 05/17/2022 22:31 WG1865229
Vinyl chloride ND 1.00 1 05/17/2022 22:31 WG1865229
o-Xylene ND 1.00 1 05/17/2022 22:31 WG1865229
m&p-Xylenes ND 2.00 1 05/17/2022 22:31 WG1865229
(S) Toluene-d8 100 80.0-120 05/17/2022 22:31 WG1865229
(S) 4-Bromofluorobenzene 104 77.0-126 05/17/2022 22:31 WG1865229
(S) 1,2-Dichloroethane-d4 93.0 70.0-130 05/17/2022 22:31 WG1865229
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207132 L1492874 05/18/22 08:15 10 of 23
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207132 L1492874 05/18/22 08:56 10 of 23
SAMPLE RESULTS - 04
L1492874
FB-1
Collected date/time: 05/10/22 14:20
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 05/15/2022 20:10 WG1863853
Acrolein ND 50.0 1 05/15/2022 20:10 WG1863853
Acrylonitrile ND 10.0 1 05/15/2022 20:10 WG1863853
Benzene ND 1.00 1 05/15/2022 20:10 WG1863853
Bromobenzene ND 1.00 1 05/15/2022 20:10 WG1863853
Bromodichloromethane ND 1.00 1 05/15/2022 20:10 WG1863853
Bromoform ND 1.00 1 05/15/2022 20:10 WG1863853
Bromomethane ND 5.00 1 05/15/2022 20:10 WG1863853
n-Butylbenzene ND 1.00 1 05/15/2022 20:10 WG1863853
sec-Butylbenzene ND 1.00 1 05/15/2022 20:10 WG1863853
tert-Butylbenzene ND 1.00 1 05/15/2022 20:10 WG1863853
Carbon tetrachloride ND 1.00 1 05/15/2022 20:10 WG1863853
Chlorobenzene ND 1.00 1 05/15/2022 20:10 WG1863853
Chlorodibromomethane ND 1.00 1 05/15/2022 20:10 WG1863853
Chloroethane ND 5.00 1 05/15/2022 20:10 WG1863853
Chloroform ND 5.00 1 05/15/2022 20:10 WG1863853
Chloromethane ND 2.50 1 05/15/2022 20:10 WG1863853
2-Chlorotoluene ND 1.00 1 05/15/2022 20:10 WG1863853
4-Chlorotoluene ND 1.00 1 05/15/2022 20:10 WG1863853
1,2-Dibromo-3-Chloropropane ND 5.00 1 05/15/2022 20:10 WG1863853
1,2-Dibromoethane ND 1.00 1 05/15/2022 20:10 WG1863853
Dibromomethane ND 1.00 1 05/15/2022 20:10 WG1863853
1,2-Dichlorobenzene ND 1.00 1 05/15/2022 20:10 WG1863853
1,3-Dichlorobenzene ND 1.00 1 05/15/2022 20:10 WG1863853
1,4-Dichlorobenzene ND 1.00 1 05/15/2022 20:10 WG1863853
Dichlorodifluoromethane ND 5.00 1 05/15/2022 20:10 WG1863853
1,1-Dichloroethane ND 1.00 1 05/15/2022 20:10 WG1863853
1,2-Dichloroethane ND 1.00 1 05/15/2022 20:10 WG1863853
1,1-Dichloroethene ND 1.00 1 05/15/2022 20:10 WG1863853
cis-1,2-Dichloroethene ND 1.00 1 05/15/2022 20:10 WG1863853
trans-1,2-Dichloroethene ND 1.00 1 05/15/2022 20:10 WG1863853
1,2-Dichloropropane ND 1.00 1 05/15/2022 20:10 WG1863853
1,1-Dichloropropene ND 1.00 1 05/15/2022 20:10 WG1863853
1,3-Dichloropropane ND 1.00 1 05/15/2022 20:10 WG1863853
2,2-Dichloropropane ND 1.00 1 05/15/2022 20:10 WG1863853
Di-isopropyl ether ND 1.00 1 05/15/2022 20:10 WG1863853
Ethylbenzene ND 1.00 1 05/15/2022 20:10 WG1863853
Hexachloro-1,3-butadiene ND 1.00 1 05/15/2022 20:10 WG1863853
Isopropylbenzene ND 1.00 1 05/15/2022 20:10 WG1863853
p-Isopropyltoluene ND 1.00 1 05/15/2022 20:10 WG1863853
2-Butanone (MEK)ND 10.0 1 05/15/2022 20:10 WG1863853
Methylene Chloride ND 5.00 1 05/15/2022 20:10 WG1863853
4-Methyl-2-pentanone (MIBK)ND 10.0 1 05/15/2022 20:10 WG1863853
Methyl tert-butyl ether ND 1.00 1 05/15/2022 20:10 WG1863853
Naphthalene ND 5.00 1 05/15/2022 20:10 WG1863853
n-Propylbenzene ND 1.00 1 05/15/2022 20:10 WG1863853
Styrene ND 1.00 1 05/15/2022 20:10 WG1863853
1,1,1,2-Tetrachloroethane ND 1.00 1 05/15/2022 20:10 WG1863853
1,1,2,2-Tetrachloroethane ND 1.00 1 05/15/2022 20:10 WG1863853
Tetrachloroethene ND 1.00 1 05/15/2022 20:10 WG1863853
Toluene ND 1.00 1 05/15/2022 20:10 WG1863853
1,2,3-Trichlorobenzene ND 1.00 1 05/15/2022 20:10 WG1863853
1,2,4-Trichlorobenzene ND 1.00 1 05/15/2022 20:10 WG1863853
1,1,1-Trichloroethane ND 1.00 1 05/15/2022 20:10 WG1863853
1,1,2-Trichloroethane ND 1.00 1 05/15/2022 20:10 WG1863853
Trichloroethene ND J4 1.00 1 05/15/2022 20:10 WG1863853
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207132 L1492874 05/18/22 08:15 11 of 23
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207132 L1492874 05/18/22 08:56 11 of 23
SAMPLE RESULTS - 04
L1492874
FB-1
Collected date/time: 05/10/22 14:20
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Trichlorofluoromethane ND 5.00 1 05/15/2022 20:10 WG1863853
1,2,3-Trichloropropane ND 2.50 1 05/15/2022 20:10 WG1863853
1,2,4-Trimethylbenzene ND 1.00 1 05/15/2022 20:10 WG1863853
1,3,5-Trimethylbenzene ND 1.00 1 05/15/2022 20:10 WG1863853
Vinyl chloride ND 1.00 1 05/15/2022 20:10 WG1863853
o-Xylene ND 1.00 1 05/15/2022 20:10 WG1863853
m&p-Xylenes ND 2.00 1 05/15/2022 20:10 WG1863853
(S) Toluene-d8 101 80.0-120 05/15/2022 20:10 WG1863853
(S) 4-Bromofluorobenzene 106 77.0-126 05/15/2022 20:10 WG1863853
(S) 1,2-Dichloroethane-d4 91.6 70.0-130 05/15/2022 20:10 WG1863853
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207132 L1492874 05/18/22 08:56 12 of 23
QUALITY CONTROL SUMMARYWG1863853
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1492874-01,02,04
Method Blank (MB)
(MB) R3792713-2 05/15/22 13:01
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
Acetone U 11.3 50.0
Acrolein U 2.54 50.0
Acrylonitrile U 0.671 10.0
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
Hexachloro-1,3-butadiene U 0.337 1.00
Isopropylbenzene U 0.105 1.00
p-Isopropyltoluene U 0.120 1.00
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207132 L1492874 05/18/22 08:15 13 of 23
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207132 L1492874 05/18/22 08:56 13 of 23
QUALITY CONTROL SUMMARYWG1863853
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1492874-01,02,04
Method Blank (MB)
(MB) R3792713-2 05/15/22 13:01
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
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 1.31 J 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 1.15 0.230 1.00
1,2,4-Trichlorobenzene U 0.481 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 103 80.0-120
(S) 4-Bromofluorobenzene 103 77.0-126
(S) 1,2-Dichloroethane-d4 87.8 70.0-130
Laboratory Control Sample (LCS)
(LCS) R3792713-1 05/15/22 12:18
Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier
Analyte ug/l ug/l %%
Acetone 25.0 30.5 122 19.0-160
Acrolein 25.0 27.8 111 10.0-160
Acrylonitrile 25.0 30.5 122 55.0-149
Benzene 5.00 5.63 113 70.0-123
Bromobenzene 5.00 5.08 102 73.0-121
Bromodichloromethane 5.00 5.58 112 75.0-120
Bromoform 5.00 5.10 102 68.0-132
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207132 L1492874 05/18/22 08:15 14 of 23
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207132 L1492874 05/18/22 08:56 14 of 23
QUALITY CONTROL SUMMARYWG1863853
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1492874-01,02,04
Laboratory Control Sample (LCS)
(LCS) R3792713-1 05/15/22 12:18
Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier
Analyte ug/l ug/l %%
Bromomethane 5.00 3.13 62.6 10.0-160
n-Butylbenzene 5.00 4.60 92.0 73.0-125
sec-Butylbenzene 5.00 5.35 107 75.0-125
tert-Butylbenzene 5.00 5.26 105 76.0-124
Carbon tetrachloride 5.00 5.05 101 68.0-126
Chlorobenzene 5.00 5.43 109 80.0-121
Chlorodibromomethane 5.00 5.48 110 77.0-125
Chloroethane 5.00 5.61 112 47.0-150
Chloroform 5.00 5.38 108 73.0-120
Chloromethane 5.00 6.83 137 41.0-142
2-Chlorotoluene 5.00 5.20 104 76.0-123
4-Chlorotoluene 5.00 5.05 101 75.0-122
1,2-Dibromo-3-Chloropropane 5.00 5.07 101 58.0-134
1,2-Dibromoethane 5.00 5.75 115 80.0-122
Dibromomethane 5.00 5.41 108 80.0-120
1,2-Dichlorobenzene 5.00 5.18 104 79.0-121
1,3-Dichlorobenzene 5.00 5.07 101 79.0-120
1,4-Dichlorobenzene 5.00 5.11 102 79.0-120
Dichlorodifluoromethane 5.00 4.75 95.0 51.0-149
1,1-Dichloroethane 5.00 5.49 110 70.0-126
1,2-Dichloroethane 5.00 5.06 101 70.0-128
1,1-Dichloroethene 5.00 5.95 119 71.0-124
cis-1,2-Dichloroethene 5.00 5.73 115 73.0-120
trans-1,2-Dichloroethene 5.00 5.76 115 73.0-120
1,2-Dichloropropane 5.00 5.93 119 77.0-125
1,1-Dichloropropene 5.00 5.76 115 74.0-126
1,3-Dichloropropane 5.00 5.66 113 80.0-120
2,2-Dichloropropane 5.00 4.66 93.2 58.0-130
Di-isopropyl ether 5.00 6.43 129 58.0-138
Ethylbenzene 5.00 5.34 107 79.0-123
Hexachloro-1,3-butadiene 5.00 4.47 89.4 54.0-138
Isopropylbenzene 5.00 5.72 114 76.0-127
p-Isopropyltoluene 5.00 5.07 101 76.0-125
2-Butanone (MEK)25.0 27.9 112 44.0-160
Methylene Chloride 5.00 5.76 115 67.0-120
4-Methyl-2-pentanone (MIBK)25.0 29.8 119 68.0-142
Methyl tert-butyl ether 5.00 5.69 114 68.0-125
Naphthalene 5.00 5.77 115 54.0-135
n-Propylbenzene 5.00 5.19 104 77.0-124
Styrene 5.00 5.49 110 73.0-130
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207132 L1492874 05/18/22 08:56 15 of 23
QUALITY CONTROL SUMMARYWG1863853
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1492874-01,02,04
Laboratory Control Sample (LCS)
(LCS) R3792713-1 05/15/22 12:18
Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier
Analyte ug/l ug/l %%
1,1,1,2-Tetrachloroethane 5.00 5.69 114 75.0-125
1,1,2,2-Tetrachloroethane 5.00 4.78 95.6 65.0-130
Tetrachloroethene 5.00 5.62 112 72.0-132
Toluene 5.00 5.67 113 79.0-120
1,2,3-Trichlorobenzene 5.00 5.19 104 50.0-138
1,2,4-Trichlorobenzene 5.00 4.83 96.6 57.0-137
1,1,1-Trichloroethane 5.00 5.39 108 73.0-124
1,1,2-Trichloroethane 5.00 5.20 104 80.0-120
Trichloroethene 5.00 6.35 127 78.0-124 J4
Trichlorofluoromethane 5.00 4.88 97.6 59.0-147
1,2,3-Trichloropropane 5.00 5.09 102 73.0-130
1,2,4-Trimethylbenzene 5.00 5.23 105 76.0-121
1,3,5-Trimethylbenzene 5.00 5.34 107 76.0-122
Vinyl chloride 5.00 5.00 100 67.0-131
o-Xylene 5.00 5.72 114 80.0-122
m&p-Xylenes 10.0 11.2 112 80.0-122
(S) Toluene-d8 101 80.0-120
(S) 4-Bromofluorobenzene 103 77.0-126
(S) 1,2-Dichloroethane-d4 91.1 70.0-130
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207132 L1492874 05/18/22 08:15 16 of 23
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207132 L1492874 05/18/22 08:56 16 of 23
QUALITY CONTROL SUMMARYWG1865229
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1492874-02,03
Method Blank (MB)
(MB) R3792975-2 05/17/22 19:43
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
Acetone U 11.3 50.0
Acrolein U 2.54 50.0
Acrylonitrile U 0.671 10.0
Benzene 0.148 J 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
Hexachloro-1,3-butadiene U 0.337 1.00
Isopropylbenzene U 0.105 1.00
p-Isopropyltoluene U 0.120 1.00
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG1865229
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1492874-02,03
Method Blank (MB)
(MB) R3792975-2 05/17/22 19:43
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
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
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 99.1 80.0-120
(S) 4-Bromofluorobenzene 105 77.0-126
(S) 1,2-Dichloroethane-d4 90.6 70.0-130
Laboratory Control Sample (LCS)
(LCS) R3792975-1 05/17/22 18:28
Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier
Analyte ug/l ug/l %%
Acetone 25.0 29.2 117 19.0-160
Acrolein 25.0 26.5 106 10.0-160
Acrylonitrile 25.0 29.0 116 55.0-149
Benzene 5.00 5.78 116 70.0-123
Bromobenzene 5.00 4.56 91.2 73.0-121
Bromodichloromethane 5.00 5.31 106 75.0-120
Bromoform 5.00 4.95 99.0 68.0-132
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG1865229
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1492874-02,03
Laboratory Control Sample (LCS)
(LCS) R3792975-1 05/17/22 18:28
Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier
Analyte ug/l ug/l %%
Bromomethane 5.00 4.25 85.0 10.0-160
n-Butylbenzene 5.00 4.33 86.6 73.0-125
sec-Butylbenzene 5.00 5.25 105 75.0-125
tert-Butylbenzene 5.00 5.00 100 76.0-124
Carbon tetrachloride 5.00 5.81 116 68.0-126
Chlorobenzene 5.00 5.38 108 80.0-121
Chlorodibromomethane 5.00 5.25 105 77.0-125
Chloroethane 5.00 5.50 110 47.0-150
Chloroform 5.00 5.62 112 73.0-120
Chloromethane 5.00 5.69 114 41.0-142
2-Chlorotoluene 5.00 5.03 101 76.0-123
4-Chlorotoluene 5.00 4.86 97.2 75.0-122
1,2-Dibromo-3-Chloropropane 5.00 4.91 98.2 58.0-134
1,2-Dibromoethane 5.00 4.89 97.8 80.0-122
Dibromomethane 5.00 5.78 116 80.0-120
1,2-Dichlorobenzene 5.00 4.72 94.4 79.0-121
1,3-Dichlorobenzene 5.00 5.12 102 79.0-120
1,4-Dichlorobenzene 5.00 4.67 93.4 79.0-120
Dichlorodifluoromethane 5.00 4.78 95.6 51.0-149
1,1-Dichloroethane 5.00 5.72 114 70.0-126
1,2-Dichloroethane 5.00 5.17 103 70.0-128
1,1-Dichloroethene 5.00 5.92 118 71.0-124
cis-1,2-Dichloroethene 5.00 5.89 118 73.0-120
trans-1,2-Dichloroethene 5.00 5.80 116 73.0-120
1,2-Dichloropropane 5.00 5.99 120 77.0-125
1,1-Dichloropropene 5.00 5.80 116 74.0-126
1,3-Dichloropropane 5.00 5.50 110 80.0-120
2,2-Dichloropropane 5.00 5.82 116 58.0-130
Di-isopropyl ether 5.00 6.45 129 58.0-138
Ethylbenzene 5.00 5.31 106 79.0-123
Hexachloro-1,3-butadiene 5.00 4.75 95.0 54.0-138
Isopropylbenzene 5.00 5.63 113 76.0-127
p-Isopropyltoluene 5.00 4.97 99.4 76.0-125
2-Butanone (MEK)25.0 25.1 100 44.0-160
Methylene Chloride 5.00 5.68 114 67.0-120
4-Methyl-2-pentanone (MIBK)25.0 26.6 106 68.0-142
Methyl tert-butyl ether 5.00 5.66 113 68.0-125
Naphthalene 5.00 4.19 83.8 54.0-135
n-Propylbenzene 5.00 4.90 98.0 77.0-124
Styrene 5.00 5.13 103 73.0-130
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG1865229
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1492874-02,03
Laboratory Control Sample (LCS)
(LCS) R3792975-1 05/17/22 18:28
Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier
Analyte ug/l ug/l %%
1,1,1,2-Tetrachloroethane 5.00 5.55 111 75.0-125
1,1,2,2-Tetrachloroethane 5.00 4.42 88.4 65.0-130
Tetrachloroethene 5.00 5.71 114 72.0-132
Toluene 5.00 5.63 113 79.0-120
1,2,3-Trichlorobenzene 5.00 4.41 88.2 50.0-138
1,2,4-Trichlorobenzene 5.00 4.49 89.8 57.0-137
1,1,1-Trichloroethane 5.00 5.26 105 73.0-124
1,1,2-Trichloroethane 5.00 5.17 103 80.0-120
Trichloroethene 5.00 5.86 117 78.0-124
Trichlorofluoromethane 5.00 4.82 96.4 59.0-147
1,2,3-Trichloropropane 5.00 5.00 100 73.0-130
1,2,4-Trimethylbenzene 5.00 5.05 101 76.0-121
1,3,5-Trimethylbenzene 5.00 5.24 105 76.0-122
Vinyl chloride 5.00 4.98 99.6 67.0-131
o-Xylene 5.00 5.63 113 80.0-122
m&p-Xylenes 10.0 10.8 108 80.0-122
(S) Toluene-d8 96.8 80.0-120
(S) 4-Bromofluorobenzene 104 77.0-126
(S) 1,2-Dichloroethane-d4 92.4 70.0-130
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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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
J The identification of the analyte is acceptable; the reported value is an estimate.
J4 The associated batch QC was outside the established quality control range for accuracy.
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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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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Arkansas 88-0469 New Jersey–NELAP TN002
California 2932 New Mexico ¹TN00003
Colorado TN00003 New York 11742
Connecticut PH-0197 North Carolina Env375
Florida E87487 North Carolina ¹DW21704
Georgia NELAP North Carolina ³41
Georgia ¹923 North Dakota R-140
Idaho TN00003 Ohio–VAP CL0069
Illinois 200008 Oklahoma 9915
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
Michigan 9958 Virginia 110033
Minnesota 047-999-395 Washington C847
Mississippi TN00003 West Virginia 233
Missouri 340 Wisconsin 998093910
Montana CERT0086 Wyoming A2LA
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.
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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