MO-3627_9190_CA_MRP_20230623

SUBSEQUENT MONITORING
REPORT
FORMER HUFFSTICKLER EXXON (INCIDENT NO. 9190)
904 NORTH MAIN STREET
STANLEY, GASTON COUNTY, NORTH CAROLINA
ESP Project No. 23-00200-064

Prepared For:
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646

Prepared By:
ESP Associates, Inc.
P. O. Box 7030
Charlotte, North Carolina 28241

June 23, 2023

ESP Associates, Inc.
P.O. Box 7030 • Charlotte, NC 28241
1.800.960.7317 • NC: 704.583.4949, fax [phone] • SC: 803.802.2440, fax [phone]
www.espassociates.com

June 23, 2023

Mr. Scott Ryals, PE
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646

Email: [e-mail]

Reference: SUBSEQUENT MONITORING REPORT
Former Huffstickler Exxon (Incident #9190)
904 North Main Street
Stanley, Gaston County, North Carolina
ESP Project No. 23-00200-064

Dear Mr. Ryals:

ESP Associates, Inc. (ESP) is pleased to present this Subsequent Monitoring Report documenting
activities performed at the subject site, Former Huffstickler Exxon, in accordance with North
Carolina Department of Environmental Quality (NCDEQ), Task Authorization No. 1, approved on
April 12, 2023. The subject site is located at 904 North Main Steet in Stanley, North Carolina.

We appreciate the opportunity to provide environmental services on this project. If you should
have any questions, please do not hesitate to contact us at [phone].

Sincerely,
ESP Associates, Inc.

Matthew R. Craig Christopher J. Ward, PG, RSM
Project Manager Department Manager

Attachment - Subsequent Monitoring Report

TABLE OF CONTENTS

Section Page

SITE INFORMATION ......................................................................................................... i

EXECUTIVE SUMMARY .................................................................................................. ii

1.0 INTRODUCTION ............................................................................................................... 1
1.1 SITE SETTING ........................................................................................................... 1
1.2 SITE GEOLOGY AND HYDROGEOLOGY ................................................................. 1
1.3 SURFACE WATER ..................................................................................................... 2
1.4 WATER SUPPLY WELLS ........................................................................................... 2

2.0 SITE HISTORY .................................................................................................................. 3

3.0 FIELD ACTIVITIES ........................................................................................................... 6
3.1 WATER LEVEL GAUGING ........................................................................................ 6
3.2 FREE PRODUCT EVALUATION ................................................................................ 6
3.3 GROUNDWATER SAMPLING ................................................................................... 6
3.4 FIELD QUALITY CONTROL SAMPLIGN AND ANYLYSIS ....................................... 7

4.0 GROUNDWATER ANALYTICAL RESULTS .................................................................... 8

5.0 CONCLUSIONS AND RECOMMENDATIONS ................................................................. 9

6.0 REFERENCES ................................................................................................................. 10

FIGURES
Figure 1 USGS Topographic Site Location Map
Figure 2 Site Map
Figure 3 Groundwater Elevation Map
Figure 4 Groundwater Results Map
Figure 5 Benzene Isoconcentration Map
Figure 6 Water Supply Well Radius Map

TABLES
Table 1 Water Supply Well Information
Table 2 Monitoring Well Construction and Groundwater Elevation Data
Table 3 Summary of Groundwater Analytical Results

APPENDICES
Appendix A Table of Previous Groundwater Analytical Results
Appendix B Field Documentation
Appendix C Laboratory Data Reports

i
SITE INFORMATION

Date of Report: June 23, 2023
NCDEQ Incident No: 9190
NCDEQ UST No.: MO-3627
Site Name: Former Huffstickler Exxon
Site Location: 904 North Main Street
Stanley, Gaston County, North Carolina 28164

Latitude: N 350 22” 16.2”
Longitude: W 810 05’ 55.8”

UST Owner/ Operator: Unknown

Current Property
Owner: Callaway Motor Co. LLC
840 North Main Street
Stanley, North Carolina 28164
(704)-412-5150

Current Property
Occupant: Callaway Motor and a Storage Building

Consultant: ESP Associates, Inc.
P.O. Box 7030
Charlotte, North Carolina 28241
[phone]

Laboratory: Pace Analytical Services, LLC
NCDEQ No. 5342
9800 Kincey Avenue
Huntersville, North Carolina 28028
[phone]

Release Information: Release Discovery Date: September 1992
Estimate Quantity: Unknown
Cause of Release: Overfilling of USTs and leaks from UST system
Source of Release: three 4,000-gallon gasoline USTs and fuel
dispensers
Currently Active Tanks: None

Subsequent Monitoring Report ESP Project No. 23-00200-0064
Former Huffstickler Exxon (Incident #9190) June 23, 2023

ii

EXECUTIVE SUMMARY

This executive summary section provides an abbreviated reporting of our Site observations and
findings. Refer to the main text and appendices for a complete reporting of our observations and
findings.

ESP Associates, Inc. (ESP) has completed a Subsequent Monitoring Report documenting assessment
activities performed at the Former Huffstickler Exxon site (Incident 9190). The site is an
approximate 0.80-acre developed site (Tax Parcel No. 174315) located at 904 North Main Street in
Stanley, Gaston County, North Carolina. This report was completed to summarize the findings of
assessment activities performed on May 18 and 19, 2023, in accordance with North Carolina
Department of Environmental Quality (NCDEQ), Task Authorization No. 1, approved on April 12,
2023.

The work is being performed as part of the State Lead Contract #N70522-D between NCDEQ and
ESP Associates, Inc. This report was prepared in general accordance with the 15A NCAC 2L .0115
regulations and the NCDEQ UST Section Guidelines for Assessment and Corrective Action for UST
Releases, January 2021, under the supervision of Christopher J. Ward, North Carolina registered
professional geologist (North Carolina License No. 1600).

Between May 18 and 19, 2023, ESP gauged static water levels and collected groundwater samples
from monitoring wells MW-1, MW-2, MW-3, and MW-5 through MW-9. It should be noted that
ESP was not able to access monitoring well MW-4 as the location was blocked by a vehicle.
Efforts to have the property owner move the vehicle were unsuccessful.

Groundwater samples from monitoring wells MW-1, MW-2, MW-3, and MW-5 through MW-9,
were analyzed for volatile organic compounds (VOCs) by EPA Method 6200B including methyl-
tert-butyl ether (MTBE), ethylene dibromide (EDB), and isopropyl ether (IPE). Groundwater
analytical results were compared to both North Carolina Groundwater Quality Standards 15A
NCAC 2L .0202 (2L Standards) and Gross Contaminant Levels (GCLs). Results of the recent
assessment activities revealed the following:
• Static water level depths ranged from 12.74 to 14.45 feet below TOC with a groundwater
flow beneath the site determined to be toward the northeast and southeast.
• Free product was not measured or observed in any of the site monitoring wells;
• Benzene was detected above its GCL of 5,000 µg/L in MW-1 (10,700 µg/L) and MW-2
(5,010 µg/L) while benzene was also detected above its 2L Standard of 1 µg/L in MW-1,
MW-2, MW-3, MW-6, MW-8, and MW-9.
• Multiple VOCs were detected at concentrations exceeding their respective 2L Standards in
groundwater samples collected from MW-1, MW-2, MW-3, MW-6, MW-8, and MW-9.
Subsequent Monitoring Report ESP Project No. 23-00200-0064
Former Huffstickler Exxon (Incident #9190) June 23, 2023

ii

• VOCs were not detected at concentrations above laboratory reporting limits in MW-5 and
MW-7, except for chloroform and toluene in MW-7, which were detected at concentrations
well below their 2L Standards.
• No analytes were detected above their reporting limits in the field blank sample;
• As compared to the most recent sampling event performed on September 20, 2022, VOC
concentrations across the site have remained relatively stable with some general decreases
and increases in analyte concentrations reported in site monitoring wells.
• Elevated total BTEX concentrations from the May 2023 sampling event in monitoring
wells MW-1 (127,340 µg/L), MW-2 (135,790 µg/L), MW-6 (125,870 µg/L), and MW-9
(58,420 µg/L) indicate the likely presence of a source area within and beyond the former
UST system footprint.

Based on the above conclusions, ESP offers the following recommendations:
• Request product specifications and bids from vendors to evaluate the feasibility of
conducting injection events to deliver chemical remedial technologies to augment
biodegradation and increase anerobic microorganisms across the source area; and
• Continue to sample site monitoring wells on a semi-annual basis.
Subsequent Monitoring Report ESP Project No. 23-00200-0064
Former Huffstickler Exxon (Incident #9190) June 23, 2023

1

1.0 INTRODUCTION

1.1 Site Setting

The former Huffstickler Exxon site is an approximate 0.80-acre developed site (Tax Parcel No.
174315) located at 904 North Main Street in Stanley, Gaston County, North Carolina (see Figures 1
and 2). The site includes an approximate 1,188-sqft active automotive repair shop built in 1990 along
with gravel parking on the western portion of the tax parcel while the eastern portion of the tax parcel
includes a self-storage building. The site is bounded to the south by Mariposa Road and beyond by
commercial/retail properties including a gas station, to the west by North Main Street and beyond by
single-family residential properties, and to the north by woods and beyond by commercial properties.

1.2 Site Geology and Hydrogeology

A consideration of surface and subsurface drainage and geology are of interest since they provide
an indication of the direction that contamination, if present on-site or off-site, could be transported.

The site is located within the Kings Mountain Belt of the Piedmont Physiographic Province. The
Piedmont Physiographic Province generally consists of low to medium elevation, rounded hills,
and long rolling northeast to southwest trending ridges with incised creeks and river channels.
Rocks in the site area are described as quartz sericite schist, metamorphosed volcanic rock, and
quartz-pebble metaconglomerate. In-place chemical and physical weathering of parent rocks
typically form residual soils in the Piedmont region. Weathering is facilitated by the presence of
fractures, joints, and less resistant minerals in the rock. In areas not altered by erosion, alluvial
deposition or the activities of man, the typical residual soil profile consists of clay-rich
unconsolidated materials at the surface, transitioning to sandy silts and silty sands at depth.
Typically, the boundary between soil and rock is not sharply defined. This transitional zone is
termed “partially weathered rock” or saprolite. Information obtained from the Web Soil Survey
for Gaston County, depicts soils on the site as Cecil-Urban land complex (CfB) with some Cecil
sandy clay loam (CeB2).

In the Piedmont, 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 soils and percolating downward under
the influence of gravity to the water table. 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.
Subsequent Monitoring Report ESP Project No. 23-00200-0064
Former Huffstickler Exxon (Incident #9190) June 23, 2023

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The direction and movement of groundwater through soil is generally dependent on soil type, the
presence of relict structures, and the textures of the underlying rock. Fractures, faults, folds, and
foliation planes affect the migration of groundwater in rock. No major geologic features (faults,
etc.) are present at or near the site. Groundwater typically flows in directions parallel to the ground
surface and under the influence of gravity, migrates to discharge points such as surface water
features, the toes of slopes or natural springs. Fluctuations in the depth of the water table can be
expected depending on variations in precipitation, surface water run-off and other factors.
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 historical data and May 2023 water level
measurements, groundwater at the site is expected to flow generally to the northeast-southeast;
however, groundwater measurements collected on September 20, 2022, indicated a groundwater
flow direction to the west.

1.3 Surface Water

The site is located within the drainage basin of Stanley Creek, which, at its closest point, is located
approximately 1,200 feet east of the site. Stanley Creek drains into the Catawba River. No surface
water features were observed on or immediately adjacent to the site (see Figure 1).

1.4 Water Supply Wells

Three water-supply wells were previously identified within 1,500 feet of the UST basin (source area)
as depicted on Figure 6. Public water is reportedly available to the site and surrounding properties
located along the east side of North Main Street. A rail line parallels the western side of North Main
Street. It is unlikely properties along Watts Road (to the west of the site) can be connected to the
municipal water supply, given the presence of the rail line. The three water supply wells include:
• WSW-1, located approximately 250 feet northwest and upgradient of the source area, is
currently an active well;
• WSW-2, located approximately 550 feet northwest and upgradient of the source area, is
currently an active wells; and
• WSW-3, located approximately 450 feet south of the source area, is reportedly inactive. The
property containing WSW-3 is a vacant residence with access to municipal water.

A summary of the water supply well information is presented in Table 1, while their general
locations are depicted on Figure 6.

Subsequent Monitoring Report ESP Project No. 23-00200-0064
Former Huffstickler Exxon (Incident #9190) June 23, 2023

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2.0 SITE HISTORY

The following description of historical site activities was obtained from a report titled “Subsequent
Monitoring Report - Former Huffstickler Exxon (Incident #9190)” dated October 18, 2022 by
Terracon Consultants, Inc.

• The on-site UST system was comprised of three 4,000-gallon gasoline USTs and associated
piping. The USTs were reportedly out of service in 1982 and were removed by Certifoam
Services on September 24, 1992. Approximately 380 cubic yards of soil were excavated
during the removal of the tanks. Soil samples collected from the tank basin indicated
concentrations of total petroleum hydrocarbons as high as 5,036 milligrams per kilogram
(mg/kg), above the NCDEQ action level. Concentrations of benzene, ethylbenzene, toluene,
and xylenes exceeded their respective Gross Contaminant Levels (GCLs) in samples
obtained from shallow groundwater encountered in the tank basin during closure activities.

• Terraine Environmental (Terraine) prepared a “Limited Site Assessment”, dated February
12, 2007. As part of the LSA, Terraine, installed a Type II monitoring well (MW-1) adjacent
to the tank basin, collected soil and groundwater samples and performed a receptor survey.
Benzene exceeded its Maximum Soil Contaminant Concentration (MSCC) in the soils
collected during the installation of monitoring well MW-1 and its GCL in the groundwater.

• In 2007 Terraine installed monitoring wells MW-2 through MW-7 to delineate groundwater
contamination at the site and adjoining properties. Benzene was detected in monitoring wells
MW-1 and MW-2 above its GCL.

• In 2009, Terraine installed monitoring wells MW-8 and MW-9. Benzene was detected at
concentrations exceeding its GCL in groundwater samples from wells MW-1, MW-2, and
MW-6.

• In July 2010, Terraine conducted a Mobile Multi-Phase Extraction (MMPE) Event
completed by Advanced Environmental Services, Inc. (AES) utilizing monitoring wells
MW-1, MW-2, MW-3, and MW-9. Free product was not detected in the wells prior to or
after the MMPE event. According to AES, 4,452 gallons of product/water were removed as
liquid, and an equivalent of 226.32 gallons of gasoline was removed as vapor. The MMPE
event was moderately successful showing a general decrease in compound concentrations.
Although reduced, concentrations of benzene remained above the GCL in groundwater
samples collected from monitoring wells MW-1, MW-2, and MW-6. MTBE exceeded its
GCL in well MW-1.

Subsequent Monitoring Report ESP Project No. 23-00200-0064
Former Huffstickler Exxon (Incident #9190) June 23, 2023

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• Terraine prepared a “Soil Boring Results” letter, dated January 31, 2011, reporting six soil
borings were advanced at various locations along the western portion of the property near
the former location of the USTs and associated piping. Based on the soil analytical results,
the highest concentrations of petroleum-impacted soils were detected in the soil boings
closest to the former UST basin and associated fuel dispensers. C9-C22 aromatic
hydrocarbon fraction concentrations exceeded the Residential MSCCs in the soils nearest the
former UST basin.

• Crawford Environmental Services (CES) prepared a “Receptor Update and Groundwater
Monitoring Report”, dated June 14, 2012. Benzene was detected above its GCL in wells
MW-1, MW-2 and MW-6 and MTBE was detected above its GCL in well MW-1.

• Terracon prepared a “Federal/State Lead Monitoring Report”, dated September 4, 2014, and
completed sampling of the nine monitoring wells and water supply well WSW-1. Benzene
was detected above its GCL in monitoring wells MW-1 and MW-2 at 11,700 micrograms
per liter (µg/L) and 7,250 µg/L, respectively. MTBE was detected above its GCL in
monitoring well MW-3 at 21,600 µg/L. Terracon installed O-Sox inserts in each monitoring
well except for well MW-7 to enhance degradation of petroleum contaminants in November
2014.

• Terracon completed a sampling event of the nine monitoring wells in February 2015.
Benzene was detected above the GCL in monitoring wells MW-1 at 11,500 µg/L, and MW-
2 at 8,830 µg/L. Terracon installed O-Sox well inserts into monitoring wells MW-1 and
MW-2 to enhance degradation of petroleum contaminants in May 2015.

• Terracon completed sampling events in January and October 2016. Benzene was detected
in wells MW-1, MW-2, and MW-3 at concentrations above the GCL in January and MW-1
and MW-2 in October.

• In April 2017 and February 2018, Terracon collected samples from wells MW-1 through
MW-9. Benzene was detected above its GCL in wells MW-1, MW-2, and MW-3. MTBE
was also detected above its GCL in well MW-3.

• In September 2019, Terracon sampled monitoring wells MW-1 through MW-9. Benzene
was detected above its GCL in monitoring wells MW-1 (9,940 µg/L) and MW-2 (5,510
µg/L). Groundwater samples from monitoring wells MW-1, MW-7 and MW-9 were
analyzed for natural attenuation parameters including dissolved gases (ethane, ethene and
methane), dissolved oxygen, ferrous iron, nitrate, nitrite, sulfate, and alkalinity, and were
evaluated for biodegradation potential using QuantArray-Petro to identify aerobic and
Subsequent Monitoring Report ESP Project No. 23-00200-0064
Former Huffstickler Exxon (Incident #9190) June 23, 2023

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anaerobic biodegradation organisms. The results indicated biodegradation activity in well
MW-1 and to a lesser extent in well MW-9, and that there are not enough anaerobic electron
acceptors in the groundwater to support a sustainable population of anaerobic
microorganisms needed for biodegradation. Higher oxygen values in wells MW-7 and MW-
9 suggest the plume is potentially undergoing aerobic biodegradation in the fringe areas.

• In December 2020 and September 2022, Terracon performed two groundwater monitoring
events. Benzene exceeded the GCL of 5,000 µg/L in wells MW-1 and MW-2 while
tetrachloroethene exceeded its 2L Standard in monitoring well MW-4 during the September
2022 event.

Subsequent Monitoring Report ESP Project No. 23-00200-0064
Former Huffstickler Exxon (Incident #9190) June 23, 2023

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3.0 FIELD ACTIVITIES

Field activities were performed by ESP between May 18 and 19, 2023 and included gauging of
static water levels, and the collection of groundwater samples from monitoring wells MW-1, MW-
2, MW-3, and MW-5 through MW-9. It should be noted that ESP was not able to access
monitoring well MW-4 as the location was blocked by a vehicle. Efforts to have the property
owner move the vehicle were unsuccessful. As provided in Attachment A, field logbook entries
along with groundwater sampling and field instrument calibration forms were completed in the
field to document site activities. Details of these activities are provided below.

3.1 Water Level Gauging

On May 18, 2023, prior to purging or collection of groundwater samples, depth to groundwater
from the top of casing (TOC) within each monitoring well was measured and recorded using a
decontaminated electronic water level meter. The water level measurements were collected by
first removing the plunger caps from all site monitoring wells and allowing water within the wells
to stabilize. The electronic water level meter probe was then lowered into the well and the depth
to water measured relative to the well’s TOC.

As noted on Table 2, static water level depths ranged from 12.74 to 14.45 feet below TOC (ft
bTOC). As depicted on Figure 3, based on these depth measurements, groundwater flow beneath
the site is toward the northeast and southeast.

3.2 Free Product Evaluation

During the May 18, 2023, gauging event, free product was not measured or observed in any of the
site monitoring wells.

3.3 Groundwater Sampling

On May 18 and 19, 2023, water quality parameters including pH, conductivity, temperature, and
turbidity were measured in monitoring wells MW-1, MW-2, MW-3, and MW-5 through MW-9
prior to purging the well and at approximate five-minute intervals throughout the purging process
using calibrated field water quality measurement instruments. Prior to sampling, either three
consecutive stable readings were recorded or a minimum of three well volumes were purged from
each monitoring well. Sampling was conducted using a peristaltic pump with dedicated high-
density polyethylene sample tubing. The water quality parameters were recorded on groundwater
sampling forms along with the time, depth to water, approximate flow rates, and the cumulative
volume of water purged (see groundwater sampling forms in Appendix B).
Subsequent Monitoring Report ESP Project No. 23-00200-0064
Former Huffstickler Exxon (Incident #9190) June 23, 2023

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Following purging, the peristaltic pump and dedicated tubing were used to collect representative
groundwater samples for laboratory analysis from monitoring wells MW-1, MW-2, MW-3, and
MW-5 through MW-9. The groundwater samples were collected using the approved low-flow
sampling method from the NCDEQ underground storage tank (UST) “Guidelines For Sampling”
(Change #4) dated March 7, 2022. Groundwater samples were collected in laboratory-provided
containers with appropriate preservatives, labeled, and stored on ice in a cooler for subsequent
delivery under standard chain-of-custody procedures to Pace Analytical (Pace), a North Carolina-
certified laboratory, located in Huntersville, North Carolina, for analysis. The groundwater
samples were analyzed for volatile organic compounds (VOCs) by EPA Method 6200B including
methyl-tert-butyl ether (MTBE), ethylene dibromide (EDB), and isopropyl ether (IPE).

3.4 Field Quality Control Sampling and Analysis

A field blank (QA sample) was also collected on May 19, 2023, by running deionized water
through the high-density polyethylene sample tubing using the peristaltic pump into laboratory
provided containers.

Subsequent Monitoring Report ESP Project No. 23-00200-0064
Former Huffstickler Exxon (Incident #9190) June 23, 2023

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4.0 GROUNDWATER ANALYTICAL RESULTS

Results of the laboratory analysis of groundwater samples MW-1, MW-2, MW-3, and MW-5
through MW-9 and the field blank are tabulated in Table 3. As noted on Table 3, the groundwater
analytical results are compared to both 2L Standards and GCLs. The Pace laboratory analytical
report is provided in Appendix C. A summary table of previous groundwater sampling results as
completed by others are included in Appendix A.

No analytes were detected in the groundwater samples at concentrations exceeding their respective
GCLs except for benzene in monitoring wells MW-1 and MW-2; however, various analytes were
detected at concentrations above their respective 2L Standards in 6 of the 8 sampled monitoring
wells. A summary of the groundwater analytical results is presented below:
• Benzene was detected above its GCL of 5,000 µg/L in MW-1 (10,700 µg/L) and MW-2
(5,010 µg/L) while benzene was also detected above its 2L Standard of 1 µg/L in MW-1,
MW-2, MW-3, MW-6, MW-8, and MW-9.
• Multiple VOCs were detected at concentrations exceeding their respective 2L Standards in
groundwater samples collected from MW-1, MW-2, MW-3, MW-6, MW-8, and MW-9.
• VOCs were not detected at concentrations above laboratory reporting limits in MW-5 and
MW-7, except for chloroform and toluene in MW-7, which were detected at concentrations
well below their 2L Standards.
• No analytes were detected above their reporting limits in the field blank sample.

Groundwater sampling results relative to each well location showing VOCs exceeding either their
GCL or 2L Standard are depicted on Figure 4. Figure 5 depicts the approximate horizontal extent
of the dissolved benzene groundwater plume.

As compared to the most recent sampling event performed on September 20, 2022, VOC
concentrations across the site have remained relatively stable with some general decreases and
increases in analyte concentrations reported in site monitoring wells. Total BTEX concentrations
from the May 2023 sampling event in monitoring wells MW-1 (127,340 µg/L), MW-2 (135,790
µg/L), MW-6 (125,870 µg/L), and MW-9 (58,420 µg/L) indicate the likely presence of a source
area within and beyond the former UST system footprint. It is noted that toluene in MW-1
increased significantly during this sampling event from 24,600 µg/L (9/20/22) to 99,800 µg/L
(5/18/23); however, concentrations of toluene within this range have historically been detected in
this well.

Subsequent Monitoring Report ESP Project No. 23-00200-0064
Former Huffstickler Exxon (Incident #9190) June 23, 2023

9

5.0 CONCLUSIONS AND RECOMMENDATIONS

Based on results from the May 2023 sampling activities, ESP concludes the following:
• Access to monitoring well MW-4 was not available as the location was block by a vehicle;
• Groundwater in the site’s monitoring wells was encountered at depths ranging from 12.74
to 14.45 ft bTOC.
• Free product was not measured or observed in any of the site monitoring wells.
• Benzene was detected above its GCL of 5,000 µg/L in MW-1 (10,700 µg/L) and MW-2
(5,010 µg/L) while benzene was also detected above its 2L Standard of 1 µg/L in MW-1,
MW-2, MW-3, MW-6, MW-8, and MW-9.
• Multiple VOCs were detected at concentrations exceeding their respective 2L Standards in
groundwater samples collected from MW-1, MW-2, MW-3, MW-6, MW-8, and MW-9.
• VOCs were not detected at concentrations above laboratory reporting limits in MW-5 and
MW-7, except for chloroform and toluene in MW-7, which were detected at concentrations
well below their 2L Standards.
• No analytes were detected above their reporting limits in the field blank sample.
• As compared to the most recent sampling event performed on September 20, 2022, VOC
concentrations across the site have remained relatively stable with some general decreases
and increases in analyte concentrations reported in site monitoring wells.
• Elevated total BTEX concentrations from the May 2023 sampling event in monitoring
wells MW-1 (127,340 µg/L), MW-2 (135,790 µg/L), MW-6 (125,870 µg/L), and MW-9
(58,420 µg/L) indicate the likely presence of a source area within and beyond the former
UST system footprint.

Based on the above conclusions, ESP offers the following recommendations:
• Request product specifications and bids from vendors to evaluate the feasibility of
conducting injection events to deliver chemical remedial technologies to augment
biodegradation and increase anerobic microorganisms across the source area; and
• Continue to sample site monitoring wells on a semi-annual basis.

Subsequent Monitoring Report ESP Project No. 23-00200-0064
Former Huffstickler Exxon (Incident #9190) June 23, 2023

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6.0 REFERENCES

Gaston County, North Carolina GIS website, http://gastongov.com

1985 Geologic Map of North Carolina, The North Carolina Geological Survey, Phillip M. Brown,
1985.

Terracon, October 18, 2022, Subsequent Monitoring Report: Former Huffstickler Exxon (Incident
#9190), 904 North Main Street, Stanley, Gaston County, NC. Terracon Project No. 71149535B.

Guideline for Sampling Underground Storage Tank Section, Division of Waste Management,
North Carolina Division of Environmental Quality, March 7, 2022, Change 4

FIGURES

0 350 700Feet
ESP Associates, Inc.
P.O. Box 7030Charlotte, NC 28241
Phone [phone]
www.espassociates.com
SHEET TITLE
PROJECT
PROJECT NO.
SCALE
DRAWN BY
CHECKED BY
23-00200-064
ET
NZDATE06/12/23
FIGURE 1USGS TOPOGRAPHIC SITE LOCATION MAPµAs Shown
STANLEY, NORTH CAROLINA
SITE BOUNDARY
All locations are approximate.
FORMER HUFFSTICKLER EXXON
LEGEND:
<
<<
<
<
<
<
<<
MW-1
MW-2
MW-9
MW-8
MW-4
MW-3
MW-7
MW-6 MW-5
SELF-STORAGE BUILDING
VACANT BUILDING
ICES OF GASTON COUNTY
CALLAWAY MOTOR CO.NORTH MAIN STREETM A R I P O S A R O A D
STANLEY EXPRESS GAS STATION
WOODS
SINGLE-FAMILY RESIDENCES
WOODS
FORMER UST BASIN
FORMER DISPENSER ISLANDRAILROADTRACKS
0 20 40Feet
ESP Associates, Inc.
P.O. Box 7030Charlotte, NC 28241
Phone [phone]
www.espassociates.com
SHEET TITLE
PROJECT
PROJECT NO.
SCALE
DRAWN BY
CHECKED BY
23-00200-064
ET
NZDATE06/12/23
FIGURE 2SITE MAPµAs Shown
STANLEY, NORTH CAROLINA
SITE BOUNDARY
MONITORING WELL
All locations are approximate.
FORMER HUFFSTICKLER EXXON<
LEGEND:
<
<<
<
<
<
<
<
<
MW-1
MW-2
MW-9
MW-8
MW-4
MW-3 MW-7
MW-6
MW-5NORTH MAIN STREETM A R IP O S A R O A D
(NM)
(86.10-ft)
(86.07-ft)
(86.02-ft)
(85.66-ft)
(85.91-ft)
(85.98-ft)
(85.73-ft)
(86.08-ft)SELFSTORAGEBUI
LDI
NGVACANTBUILDING
0 20 40Feet
ESP Associates, Inc.
P.O. Box 7030Charlotte, NC 28241
Phone [phone]
www.espassociates.com
SHEET TITLE
PROJECT
PROJECT NO.
SCALE
DRAWN BY
CHECKED BY
23-00200-064
ET
NZDATE06/12/23
FIGURE 3GROUNDWATER ELEVATION MAPµAs Shown
STANLEY, NORTH CAROLINA
SITE BOUNDARY
MONITORING WELL
ESTIMATED GROUNDWATER ELEVATION
ESTIMATED GROUNDWATER FLOW DIRECTION
FORMER HUFFSTICKLER EXXON
<
LEGEND:
NM - NOT MEASUREDALL LOCATIONS ARE APPROXIMATE
Groundwater elevations are relativeand are based off of a benchmark of100-ft given to MW-1
Groundwater elevations are
presented in Table 2.
86.0
85.8
<
<<
<
<
<
<
<<
MW-1
MW-2
MW-9
MW-8
MW-4
MW-3
MW-7
MW-6 MW-5
M A R I P O S A R O A D
0 20 40Feet
ESP Associates, Inc.
P.O. Box 7030Charlotte, NC 28241
Phone [phone]
www.espassociates.com
SHEET TITLE
PROJECT
PROJECT NO.
SCALE
DRAWN BY
CHECKED BY
23-00200-064
ET
NZDATE06/12/23
FIGURE 4GROUNDWATER RESULTS MAPµAs Shown
STANLEY, NORTH CAROLINA
SITE BOUNDARY
MONITORING WELL
All locations are approximate.
FORMER HUFFSTICKLER EXXON
<
LEGEND:
Only Analytes Above 2L Standards Shown.
Analytical Results Presented in Table 1.
Bolded concentrations are greater than the 2LStandard.
Yellow highlighted values indicate constituent
concentrations greater than the GCL.
VACANT BUILDING
SELF STORAGEBUILDING
Only Analytes Greater Than 2L Standards Shown.
Analytical Results Presented in Table 1.
<
<<
<
<
<
<
<<
MW-1
MW-2
MW-9
MW-8
MW-4
MW-3
MW-7
MW-6 MW-5
M A R I P O S A R O A DNORTH MAIN STREET0 20 40Feet
ESP Associates, Inc.
P.O. Box 7030Charlotte, NC 28241
Phone [phone]
www.espassociates.com
SHEET TITLE
PROJECT
PROJECT NO.
SCALE
DRAWN BY
CHECKED BY
23-00200-064
ET
NZDATE06/12/23
FIGURE 5BENZENE ISOCONCENTRATION MAPµAs Shown
STANLEY, NORTH CAROLINA
APPROXIMATE CONCENTRATION CONTOUR
SITE BOUNDARY
MONITORING WELL
All locations are approximate.
FORMER HUFFSTICKLER EXXON<
LEGEND:
Analytical Results Presented in Table 1.
1,000 ug/
L
5,000 ug/
L
SELF STORAGE BUILDING
VACANT BUILDING
536
620
ND
ND
1,950
5,010
10,700
3,710
1 ug/L
Notes:ND - Not Detected AboveLaboratory Reporting LimitGCL - Gross Contaminant Levelug/L - micrograms per liter
Benzene Comparison Criteria:2L Standard - 1 ug/LGCL - 5,000 ug/L

TABLES

Table 1
Water Supply Well Information
Former Huffstickler Exxon
Stanley, North Carolina
NCDEQ Incident No. 9190
Well No.Property Owner Mailing Address Property Address Distance/Directions
from Source Area Well Status/Use Municpal
Water
Parcel
No.
WSW-1 Glenn & Anita Morris 100 Watts Road
Stanley, NC 28164
100 Watts Road
Stanley, NC 28164 250 feet northwest Active (Potable)No 174309
WSW-2 Andrea Jenkins Shuler 114 Watts Road
Stanley, NC 28164
114 Watts Road
Stanley, NC 28164 550 feet northwest Active (Potable)No 174306
WSW-3 ICES of Gaston Co, Inc.P.O. Box 89 Stanley,
NC 28164
102 Mariposa Road
Stanley, NC 28164 450 feet south Inactive Yes 174316
Notes:
Information obtained from previous monitoring report.
Table 2
Monitoring Well Construction and Groundwater Elevation Data
Former Huffstickler Exxon
Stanley, North Carolina
NCDEQ Incident No. 9190
Well ID Date
Intalled
Date Water
Level
Measured
Screened
Interval
(ft BGS)
Bottom of
Well
(ft BGS)
Top of Casing
Elevation
(ft)
Depth to Water
from Top of
Casing
(ft)
Groundwater
Elevation
(ft bTOC)
01/16/07 18.49 81.5105/21/07 16.96 83.0410/18/07 21.05 78.9510/07/09 19.72 80.2807/20/10 17.79 82.2105/02/12 18.10 81.9008/04/14 17.90 82.1002/16/15 18.79 81.2101/26/16 14.09 85.9110/27/16 20.43 79.5704/27/17 19.17 80.8302/23/18 20.09 79.9109/26/19 19.19 80.8112/04/20 14.30 85.70
09/20/22 18.42 81.58
05/18/23 13.90 86.10
5/21/2007 17.13 83.08
10/18/2007 21.22 78.99
10/7/2009 19.90 80.31
7/20/2010 17.98 82.23
5/2/2012 17.85 82.36
8/4/2014 17.32 82.89
2/16/2015 18.87 81.34
1/26/2016 14.12 86.09
10/27/2016 20.61 79.60
4/27/2017 19.44 80.77
2/23/2018 20.34 79.879/26/2019 18.92 81.2912/4/2020 14.56 85.659/20/2022 18.74 81.475/18/2023 14.14 86.075/21/2007 17.16 82.6610/18/2007 21.24 78.5810/7/2009 19.91 79.917/20/2010 17.98 81.845/2/2012 18.31 81.518/4/2014 17.38 82.442/16/2015 18.74 81.081/26/2016 14.71 85.1110/27/2016 20.59 79.23
4/27/2017 19.32 80.50
2/23/2018 20.26 79.56
9/26/2019 18.94 80.88
12/4/2020 14.23 85.59
9/20/2022 17.94 81.88
5/18/2023 13.80 86.02
MW-3 5/17/2007 10-25 25 99.82
MW-2 5/17/2007 10-25 25 100.21
MW-1 1/15/2007 15-30 30 100.00
Page 1 of 4
Table 2
Monitoring Well Construction and Groundwater Elevation Data
Former Huffstickler Exxon
Stanley, North Carolina
NCDEQ Incident No. 9190
Well ID Date
Intalled
Date Water
Level
Measured
Screened
Interval
(ft BGS)
Bottom of
Well
(ft BGS)
Top of Casing
Elevation
(ft)
Depth to Water
from Top of
Casing
(ft)
Groundwater
Elevation
(ft bTOC)
5/21/2007 17.29 82.50
10/18/2007 21.36 78.43
10/7/2009 20.04 79.75
7/20/2010 18.07 81.72
5/2/2012 18.82 80.97
8/4/2014 17.89 81.90
2/16/2015 19.00 80.79
1/26/2016 15.27 84.52
10/27/2016 20.67 79.12
4/27/2017 19.37 80.42
2/23/2018 20.41 79.38
9/26/2019 18.58 81.21
12/4/2020 14.31 85.48
9/20/2022 17.98 81.81
5/18/2023 NM NM
10/18/2007 21.91 76.49
10/7/2009 21.03 77.37
7/20/2010 19.12 79.28
5/2/2012 20.06 78.34
8/4/2014 19.00 79.40
2/16/2015 19.90 78.50
1/26/2016 17.15 81.25
10/27/2016 21.28 77.12
4/27/2017 20.38 78.02
2/23/2018 21.18 77.22
9/26/2019 19.13 79.27
12/4/2020 14.62 83.78
9/20/2022 15.96 82.44
5/18/2023 12.74 85.66
10/18/2007 19.82 78.91
10/7/2009 18.48 80.25
7/20/2010 16.79 81.94
5/2/2012 16.27 82.46
8/4/2014 16.25 82.48
2/16/2015 17.40 81.33
1/26/2016 12.99 85.74
10/27/2016 19.24 79.49
4/27/2017 17.93 80.80
2/23/2018 18.72 80.01
9/26/2019 17.22 81.51
12/4/2020 13.19 85.54
9/20/2022 17.23 81.50
5/18/2023 12.82 85.91
10-25 25 99.795/17/2007MW-4
MW-6 10/16/2007 15-25 25 98.73
MW-5 10/16/2007 15-25 25 98.40
Page 2 of 4
Table 2
Monitoring Well Construction and Groundwater Elevation Data
Former Huffstickler Exxon
Stanley, North Carolina
NCDEQ Incident No. 9190
Well ID Date
Intalled
Date Water
Level
Measured
Screened
Interval
(ft BGS)
Bottom of
Well
(ft BGS)
Top of Casing
Elevation
(ft)
Depth to Water
from Top of
Casing
(ft)
Groundwater
Elevation
(ft bTOC)
10/18/2007 23.66 76.47
10/7/2009 22.74 77.39
7/20/2010 20.54 79.59
5/2/2012 22.28 77.85
8/4/2014 19.89 80.24
2/16/2015 21.35 78.78
1/26/2016 18.24 81.89
10/27/2016 23.90 76.23
4/27/2017 21.39 78.74
2/23/2018 22.71 77.42
9/26/2019 20.70 79.43
12/4/2020 15.70 84.43
9/20/2022 17.31 82.82
5/18/2023 14.15 85.98
10/7/2009 20.11 79.80
7/20/2010 17.70 82.21
5/2/2012 18.42 81.49
8/4/2014 17.12 82.79
2/16/2015 18.75 81.16
1/26/2016 14.69 85.22
10/27/2016 20.44 79.47
4/27/2017 19.39 80.52
2/23/2018 20.32 79.59
9/26/2019 18.17 81.74
12/4/2020 14.27 85.64
9/20/2022 18.50 81.41
5/18/2023 14.18 85.73
10/7/2009 19.71 80.82
7/20/2010 18.13 82.40
5/2/2012 18.36 82.17
8/4/2014 17.65 82.88
2/16/2015 19.44 81.09
1/26/2016 14.50 86.03
10/27/2016 20.81 79.72
4/27/2017 19.71 80.82
2/23/2018 20.70 79.83
9/26/2019 18.64 81.89
12/4/2020 14.80 85.73
9/20/2022 19.05 81.48
5/18/2023 14.45 86.08
MW-9 9/24/2009 10-25 25 100.53
MW-8 9/24/2009 10-25 25 99.91
MW-7 10/16/2007 15-25 25 100.13
Page 3 of 4
Table 2
Monitoring Well Construction and Groundwater Elevation Data
Former Huffstickler Exxon
Stanley, North Carolina
NCDEQ Incident No. 9190
Notes:
Measurements prior to the May 18, 2023 were collected by previous consultants.
Top of casing elevations, screened intervals, and bottom of well measurement are from previous consultants' monitoring reports.
Top of casing elevations are based off of an assumed benchmark elevation of 100 ft given to MW-1.
BGS - below ground surface
TOC - Top of Casing
ft bTOC - feet below TOC
NM - Not Measured
Page 4 of 4
Table 3
Summary of Groundwater Analytical Results
Former Huffstickler Exxon
Stanley, North Carolina
NCDEQ Incident No. 9190
MW-1 MW-2 MW-3 MW-5 MW-6 MW-7 MW-8 MW-9 Field
Blank
05/18/23 05/19/23 05/19/23 05/19/23 05/19/23 05/19/23 05/18/23 05/18/23 05/19/23
Benzene 1 5,000 10,700 5,010 620 <0.34 3,710 <0.34 536 1,950 <0.34
Chloroform 70 70,000 <215 <430 <21.5 <0.43 <430 25.2 <53.8 <108 <0.43
Diisopropyl Ether 70 70,000 275 <308 <15.4 <0.31 <308 <0.31 <38.5 <77.0 <0.31
Ethylbenzene 600 80,000 2,300 2,410 1,480 <0.30 2,710 <0.30 1,120 3,450 <0.31
Isopropylbenzene (Cumene)70 30,500 <166 <333 155 <0.33 <333 <0.33 45.6 (J)156 <0.33
Methyl-tert-butyl ether (MTBE)20 20,000 11,000 789 611 <0.42 <422 <0.42 <52.8 159 <0.42
Naphthalene 6 6,000 1,010 <645 680 <0.64 <645 <0.64 224 (J)795 <0.64
n-Propylbenzene 70 26,100 225 (J)<340 481 <0.34 <340 <0.34 127 497 <0.34
Toluene 600 260,000 99,800 112,000 6,920 <0.24 106,000 0.78 17,000 34,200 <0.24
1,2,4-Trimethylbenzene 400 28,500 2,920 3,470 3,690 <0.50 1,780 <0.50 1,100 4,210 <0.50
1,3,5-Trimethylbenzene 400 24,100 835 1,060 1,150 <0.33 634 <0.33 303 1,040 <0.33
m&p-Xylene 500 50,000 10,100 10,600 3,810 <0.71 9,200 <0.71 3,810 13,100 <0.71
o-Xylene 500 50,000 4,440 5,770 1,580 <0.34 4,250 <0.34 1,440 5,720 <0.34
Notes:

<23 - less than the method detction limit
µg/L - micrograms per liter
2L Standard - North Carolina 02L standard for groundwater
GCL - Gross Contaminant Level
J - Estimated concentration above the method detection limit and below the reporting limit.
VOC - Volitale Organic Compound
Yellow highlighted values indicate constituent concentrations were greater than the GCL.
Sample ID
Collection Date
Analytical Results
2L
Standard
(µg/L)
GCL
(µg/L)Regulatory Standards
Bold values indicate constituent concentrations were greater than the 2L standard.

APPENDICES

APPENDIX A

TABLE 3
Summary of Groundwater Analytical Results
Former Huffstickler Exxon
Stanley, North Carolina
Terracon Project No. 71149635B
NCDEQ Incident No. 3627
6200B
Well/Sample
I.D.
Date Collected
(mm/dd/yy)
1 100 70 70 70 70 3 200 70 0.4 0.6 0.02 70 600 70 25 5 20 6 70 0.7 600 70 400 400 500
5,000 100,000 5,900 8,800 14,750 70,000 3,000 61,500 70,000 400 600 50 70,000 80,000 30,500 11,700 5,000 20,000 6,000 26,100 700 260,000 24,500 28,500 24,100 50,000
1/16/2007 13,400 NA 14 8.24 ND ND ND ND ND ND ND NA NA 762 82.5 3.39 NA 54,800 427 87.2 NA 25,900 ND 1,550 128 2,910
5/21/2007 13,200 NA 14.40 6.75 ND ND ND ND
ND 26.2 ND NA NA 1,640 80 2.71 NA 49,800 258 133 NA 64,800 ND 1,360 244 7,080
10/18/2007 14,300 NA ND ND ND ND ND ND
ND ND ND NA NA 2,220 122 ND NA 55,700 431 174 NA 70,100 ND 1,300 252 8,380
10/7/2009 14,800 NA ND ND ND ND ND ND
ND 35.7 ND NA NA 2,940 115 NA NA 45,600 479 259 NA 109,000 ND 2,390 518 10,920
7/20/2010 13,000 NA ND ND ND ND ND ND
ND ND ND ND ND 730 ND ND NA 61,000 480 ND NA 25,000 ND 1,500 240J 3,200
5/2/2012 17,000 NA ND ND ND ND ND ND
ND ND ND NA NA 2,400 ND ND NA 31,000 400 ND NA 140,000 ND 2,500 680 14,500
8/4/2014 11,700 <5.0 <0.5 <0.5 <0.5 <0.5 <0.5 ND <0.5 17.4 <0.5 <0.5 257 1,440 63.9 NA NA 16,400 396 121 NA 89,400 ND 1,450 347 8,570
2/16/2015 11,500 <250 <125 <125 <125 <125 <125 ND <125 <125 <125 <125 <125 1,340 <125 NA 1250 15,500 <500 <125 <125 64,100 ND 1,330 361 7,500
1/26/2016 9,550 <125 <62.5 <62.5 <62.5 <62.5 <62.5 ND <62.5 <62.5 <62.5 <62.5 189 617 <62.5 NA 317J 10,100 <250 <62.5 <62.5 34,400 ND 596 128 3,940
10/27/2016 13,000 <5000 <500 <500 <500 <500 <500 ND <500 <500 <500 <500 319J 2,670 <500 NA <2000 12,100 <2000 <500 <500 119,000 ND 1,960 545 12,960
4/27/2017 11,700 <500 <500 <500 <500 <500 <500 ND <500 <500 <500 <500 269 2,120 <500 NA <500 10,200 <500 <500 <125 70,200 ND 1,640 <500 9,510
2/23/2018 10,400 <1250 <125 <125 <125 605 <250 ND <125 <125 <125 <125 159J 1,360 <125 NA 1460 6,820 <125 <125 <125 41,100 ND 1,220 321 6,330
9/26/2019 9,940 <625 <62.5 <62.5 <62.5 <625 <125 ND <62.5 <62.5 <62.5 <62.5 240 1,600 <62.5 NA <250 7,520 252J <62.5 <62.5 40,600 ND 1,370 <62.5 9,370
12/4/2020 9,250 <172 68.5 <24.6 <25.0 <35.3 <41.5 25.9J <20.7 <26.3 <18.3 <23.1 204 1,540 86.9 NA <150 9,390 444 147 <23.2 4,350 44.5J 1,850 527 6,420
9/20/2022 11,400 <332 <98.0 <80.0 <64.6 <86.0 <108 <68.0 <76.8 <64.4 <71.0 <54.4 207 1,970 <66.6 NA <390 10,000 425 131 <58.4 24,600 <128 2,100 572 9,550
5/21/2007 9,930 NA 39.5 14.1 ND ND ND ND ND 25.6 ND NA NA 2,270 114 5.66 NA 2,780 404 291 NA 79,900 ND 2,280 650 8,960
10/18/2007 9,460 NA ND ND ND ND ND ND ND ND ND NA NA 2,680 128 ND NA 3,570 422 250 NA 101,000 ND 1,710 460 10,700
10/7/2009 11,800 NA ND ND ND ND ND ND ND 30.2 ND NA NA 3,470 157 NA NA 4,260 573 432 NA 136,000 ND 3,250 889 13,110
7/20/2010 9,700 NA 72J ND ND ND ND ND ND ND ND ND ND 2,500 110 ND NA 2,300 430 350 NA 130,000 ND 2,600 740 11,900
5/2/2012 11,000 NA ND ND ND ND ND ND ND ND ND NA NA 2,700 ND ND NA 2,200 350 ND NA 120,000 ND 2,200 620 13,100
8/4/2014 7,250 <5.0 <0.5 <0.5 <0.5 <0.5 <0.5 ND <0.5 <0.5 <0.5 <0.5 37.7 2,280 101 NA NA 1,790 489 273 NA 83,800 ND 2,080 616 10,530
2/16/2015 8,830 <250 <250 <125 <125 <125 <125 ND <125 <125 <125 <125 <125 2,320 <125 NA 1180 1,280 <500 277 <125 81,300 ND 2,020 546 10,940
1/26/2016 8,410 <250 <125 <125 <125 <125 <125 ND <125 <125 <125 <125 <125 3,320 145J NA <500 1,520 684J 448 <125 99,400 ND 3,580 992 15,650
10/27/2016 8,040 <5000 <500 <500 <500 <500 <500 ND <500 <500 <500 <500 <500 2,940 <500 NA <2000 854 <2000 360J <500 127,000 ND 2,750 763 14,760
4/27/2017 6,860 <500 <500 <500 <500 <500 <500 ND <500 <500 <500 <500 <500 2,840 <500 NA <500 890 590J <500 <125 96,700 ND 2,630 735 13,520
2/23/2018 7,550 <1250 <125 <125 <125 614 <125 ND <125 <125 <125 <125 <125 3,250 <125 NA 1510 654 580J <125 <125 83,000 ND 3,020 899 13,950
9/26/2019 5,510 <2500 <125 <125 <125 <1250 <125 ND <125 <125 <125 <125 <125 2,390 <125 NA <500 1,890 581J <125 <125 74,500 ND 2,660 <125 14,260
12/4/2020 5,140 <1720 <353 <246 <250 <353 <415 <250 <207 <263 <183 <231 <334 2,750 <238 NA <1500 1,360 1180J <241 <232 101,000 <436 4,090 1,200 17,160
9/20/2022 5,350 <1660 <490 <400 <323 977 <540 <340 <384 <322 <355 <272 <308 2,010 <333 NA <1950 449 <645 <340 <292 117,000 <639 3,090 924 15,220Xylenes (Total)1,3,5-Trimethylbenzenen-PropylbenzeneChloromethane1,3-Dichlorobenzene1,2,4-Trichlorobenzenecis-1,2-DichloroetheneBromomethane1,2-Dibromoethane (EDB)Tetrachloroethene (PCE)TolueneNaphthaleneAnalytical Method
1,2,4-TrimethylbenzeneBenzeneEthylbenzeneIsopropylbenzenesec-Butylbenzenetert-Butylbenzenen-Butylbenzene1,2-DichloroethaneDiisopropyl Ether (DIPE)Contaminant of Concern →1,2-Dichloropropanep-IsopropyltolueneMethyl tert-butyl Ether (MTBE)Methylene ChlorideChloroformMW-2
MW-1
GCL (ug/L)
2L Standard (ug/L)
1 of 5
TABLE 3
Summary of Groundwater Analytical Results
Former Huffstickler Exxon
Stanley, North Carolina
Terracon Project No. 71149635B
NCDEQ Incident No. 3627
6200B
Well/Sample
I.D.
Date Collected
(mm/dd/yy)
1 100 70 70 70 70 3 200 70 0.4 0.6 0.02 70 600 70 25 5 20 6 70 0.7 600 70 400 400 500
5,000 100,000 5,900 8,800 14,750 70,000 3,000 61,500 70,000 400 600 50 70,000 80,000 30,500 11,700 5,000 20,000 6,000 26,100 700 260,000 24,500 28,500 24,100 50,000Xylenes (Total)1,3,5-Trimethylbenzenen-PropylbenzeneChloromethane1,3-Dichlorobenzene1,2,4-Trichlorobenzenecis-1,2-DichloroetheneBromomethane1,2-Dibromoethane (EDB)Tetrachloroethene (PCE)TolueneNaphthaleneAnalytical Method
1,2,4-TrimethylbenzeneBenzeneEthylbenzeneIsopropylbenzenesec-Butylbenzenetert-Butylbenzenen-Butylbenzene1,2-DichloroethaneDiisopropyl Ether (DIPE)Contaminant of Concern →1,2-Dichloropropanep-IsopropyltolueneMethyl tert-butyl Ether (MTBE)Methylene ChlorideChloroformGCL (ug/L)
2L Standard (ug/L)
5/21/2007 1,680 NA 64.8 20.2 0.62 ND ND ND ND ND ND NA NA 4,500 177 9.36 NA 1,250 772 590 NA 37,800 ND 4,190 1,220 18,800
10/18/2007 2,000 NA ND ND ND ND ND ND ND ND ND NA NA 4,130 186 ND NA 1,370 846 466 NA 31,000 ND 3,590 1,020 15,400
10/7/2009 4,840 NA ND ND ND ND ND ND ND ND ND NA NA 5,240 264 NA NA 8,320 1590 816 NA 50,900 ND 6,470 1,690 23,550
7/20/2010 2,400 NA 86 ND ND ND ND ND ND ND ND ND ND 3,400 160 ND NA 6,100 680 530 NA 29,000 ND 4,200 1,200 15,600
5/2/2012 4,000 NA ND ND ND ND ND ND ND ND ND NA NA 3,200 170 ND NA 16,000 600 570 NA 34,000 ND 4,300 1,200 15,100
8/4/2014 4,650 <5.0 <0.5 <0.5 <0.5 <0.5 <0.5 ND <0.5 <0.5 <0.5 <0.5 142 2,790 168 NA NA 21,600 796 521 NA 22,700 ND 4,030 1,180 11,550
2/16/2015 3,990 <100 <50 <50 <50 <50 <50 ND <50 <50 <50 <50 114 2,850 158 NA 427 15,100 664 492 <50 34,000 ND 3,870 1,150 12,840
1/26/2016 5,350 <62.5 <62.5 <62.5 <62.5 <62.5 <62.5 ND <62.5 <62.5 <62.5 <62.5 149 2,830 165 NA <250 18,000 740 553 <62.5 43,800 ND 4,270 1,210 11,600
10/27/2016 4,920 <2500 <250 <250 <250 <250 <250 ND <250 <250 <250 <250 <250 3,510 339 NA <1000 12,600 995J 1280 <250 57,100 ND 8,000 2,550 15,730
4/27/2017 7,180 <100 <100 <100 <100 <100 <100 ND <100 <100 <100 <100 177J 3,250 188J NA <400 20,100 716J <100 <100 60,400 ND 4,450 <100 13,270
2/23/2018 6,600 <1000 <100 <100 <100 527 <100 ND <100 <100 <100 <100 113J 3,410 202 NA 1210 11,700 709J <100 <100 71,300 ND 4,880 1,320 14,660
9/26/2019 1,750 <250 <25 <25 <25 <250 <25 ND <25 <25 <25 <25 <25 2,550 243 NA <100 1,610 825 <25 49J 10,100 ND 6,690 1,930 10,000
12/4/2020 487 <68.8 <14.1 <9.8 <10 <14.1 <16.6 <10 <8.3 <10.5 <7.3 <9.2 <13.4 1,300 146 NA <60 426 421 461 <9.3 924 <17.4 3,560 1,070 3,800
9/20/2022 674 <83.0 <24.5 <20.0 <16.2 <21.5 <27.0 <17.0 <19.2 <16.1 <17.8 <13.6 <15.4 1,670 190 NA <97.5 652 526 578 <14.6 6,010 <32.0 4,460 1,410 5,670
10/18/2007 9 NA 51.8 16.8 ND ND ND ND ND ND 0.86 NA NA 3,520 140 8.36 NA ND 664 334 NA 1260 ND 2,970 792 15,600
10/7/2009 3.3 NA ND ND ND ND ND ND ND ND ND NA NA 3,560 ND NA NA 1.7 668 468 NA 500 ND 4,178 1,000 16,860
7/20/2010 ND NA 80 ND 21 ND ND ND ND ND ND ND ND 2,200 140 39 NA ND 480 430 NA 100 ND 3,400 1,000 7,700
5/2/2012 ND NA ND 15J ND ND ND ND ND ND ND NA NA 3,500 150
ND NA ND 510 420 NA 190 ND 3,500 960 8,800
8/4/2014 20.4 <5.0 <0.5 16.1 <0.5 <0.5 <0.5 ND <0.5 <0.5 <0.5 <0.5 <0.5 2,090 155
NA NA 27.6 543 365 NA 84.2 ND 2,970 793 5,100
2/16/2015 79.1 <12.5 <6.2 <6.2 <6.2 <6.2 <6.2 ND <6.2 <6.2 <6.2 <6.2 <6.2 3,070 143
NA <25 79.7 730 391 <6.2 135 ND 2,870 812 7,330
1/26/2016 15.4 <10 <5.0 <5.0 <5.0 <5.0 <5.0 ND <5.0 <5.0 <5.0 <5.0 <5.0 3,020 140
NA <20 44 800 434 <5.0 103 ND 3,420 926 7,520
10/27/2016 355 <125 <12.5 <12.5 <12.5 <12.5 <12.5 ND <12.5 <12.5 <12.5 <12.5 15 3,100 139
NA <50 2,310 744 442 <12.5 117 ND 3,170 903 7,070
4/27/2017 421 <6.2 <6.2 <6.2 <6.2 <6.2 12.7J ND <6.2 <6.2 <6.2 <6.2 <6.2 3,480 157
NA <25 1,900 884 <6.2 <6.2 117 ND 3,420 <6.2 8,000
2/23/2018 393 <100 <10 <10 <10 <10 <10 ND <10 <10 <10 <10 <10 3,770 160
NA <40 609 955 <10 <10 85.2 ND 3,710 <10 8,160
9/26/2019 8.3J <62.5 <6.2 <6.2 <6.2 <6.2 <62.5 ND <6.2 <6.2 <6.2 <6.2 <6.2 2,260 145
NA <25 80 571 <6.2 15.8 42.5 ND 3,670 <6.2 5,050
12/4/2020 1.3J <8.6 <1.8 <1.2 <1.2 <1.8 <2.1 <1.2 <1.0 <1.3 <0.92 <1.2 <1.7 518 39
NA 7.7J <2.2 139 <1.2 <1.2 7.8 <2.2 882 299 1,148
9/20/2022 <4.3 <20.8 <6.1 <5.0 <4.0 <5.4 <6.8 <4.2 <4.8 <4.0 <4.4 <3.4 <3.8 1,510 104 NA <24.4 <5.3 389 274 8.8 24.0 <8.0 2,210 703 3,170
MW-4
MW-3
2 of 5
TABLE 3
Summary of Groundwater Analytical Results
Former Huffstickler Exxon
Stanley, North Carolina
Terracon Project No. 71149635B
NCDEQ Incident No. 3627
6200B
Well/Sample
I.D.
Date Collected
(mm/dd/yy)
1 100 70 70 70 70 3 200 70 0.4 0.6 0.02 70 600 70 25 5 20 6 70 0.7 600 70 400 400 500
5,000 100,000 5,900 8,800 14,750 70,000 3,000 61,500 70,000 400 600 50 70,000 80,000 30,500 11,700 5,000 20,000 6,000 26,100 700 260,000 24,500 28,500 24,100 50,000Xylenes (Total)1,3,5-Trimethylbenzenen-PropylbenzeneChloromethane1,3-Dichlorobenzene1,2,4-Trichlorobenzenecis-1,2-DichloroetheneBromomethane1,2-Dibromoethane (EDB)Tetrachloroethene (PCE)TolueneNaphthaleneAnalytical Method
1,2,4-TrimethylbenzeneBenzeneEthylbenzeneIsopropylbenzenesec-Butylbenzenetert-Butylbenzenen-Butylbenzene1,2-DichloroethaneDiisopropyl Ether (DIPE)Contaminant of Concern →1,2-Dichloropropanep-IsopropyltolueneMethyl tert-butyl Ether (MTBE)Methylene ChlorideChloroformGCL (ug/L)
2L Standard (ug/L)
10/18/2007 3,810 NA ND 27.2 ND ND ND ND ND ND ND NA NA 1,130 104 ND NA 146 553 173 NA 9,070 ND 1,230 313 3,500
10/7/2009 736 NA ND ND ND ND ND ND ND ND ND NA NA 2,780 202 NA NA 150 747 476 NA 20,400 ND 2,650 823 12,700
7/20/2010 610 NA 52 18J ND ND ND ND ND ND ND ND ND 2,300 130 33 NA 170 490 320 NA 8,900 ND 2,600 630 9,700
5/2/2012 810 NA ND ND ND ND ND ND ND ND ND NA NA 2,900 150 ND NA 180 370 370 NA 13,000 ND 2,700 700 11,900
8/4/2014 549 <5.0 <0.5 16 <0.5 <0.5 <0.5 ND <0.5 0.9 <0.5 <0.5 2.4 1,950 132 NA NA 154 410 261 NA 3,090 ND 2,000 546 7,310
2/16/2015 599 <12.5 <6.2 <6.2 <6.2 <6.2 <6.2 ND <6.2 <6.2 <6.2 <6.2 <6.2 1,820 102 NA 65.6 141 392 231 <6.2 4,000 ND 1,790 464 6,940
1/26/2016 557 <10 <5.0 <5.0 <5.0 <5.0 <5.0 ND <5.0 <5.0 <5.0 <5.0 <5.0 1,730 98.7 NA 25.4J 170 412 249 <5.0 636 ND 1,960 516 5,760
10/27/2016 317 <62.5 <6.2 <6.2 <6.2 <6.2 <6.2 ND <6.2 <6.2 <6.2 <6.2 <6.2 1,580 88.8 NA <25 63.5 367 237 <6.2 1,200 ND 1,710 460 5,600
4/27/2017 439 <5.0 <5.0 <5.0 <5.0 <5.0 10.2J ND <5.0 <5.0 <5.0 <5.0 <5.0 1,620 98.7 NA <20 122 362 <5.0 <5.0 218 ND 1,820 498 5,161
2/23/2018 498 <50 <5.0 <5.0 <5.0 24.2 <5.0 ND 6.2J <5.0 <5.0 <5.0 <5.0 2,190 123 NA 88.7 125 461 327 <5.0 98.7 ND 2,460 647 6,964
9/26/2019 136 <25 <2.5 <2.5 <2.5 <25 <2.5 ND <2.5 <2.5 <2.5 <2.5 <2.5 742 66.4 NA <10 41.9 172 155 6 19.0 ND 1,320 359 1,976
12/4/2020 20.7 <1.7 <0.35 <0.25 <0.25 <0.35 <0.42 <0.25 <0.21 <0.26 <0.18 <0.23 <0.33 67.5 9.8 NA <1.5 12 20.4 20.5 <0.23 0.41J <0.44 164 54.8 130.2
9/20/2022 <0.34 <1.7 <0.49 <0.40 <0.32 0.7 <0.54 <0.34 <0.38 <0.32 <0.36 <0.27 <0.31 <0.30 <0.33 NA <2.0 <0.42 <0.64 <0.34 <0.29 <0.48 <0.64 <0.50 <0.33 <1.05
10/18/2007 368 NA ND 26.2 ND ND ND ND ND ND ND NA NA 1,850 98.2 ND NA 124 422 214 NA 8,140 ND 1,640 422 6,470
10/7/2009 6,540 NA ND ND ND ND ND ND ND ND ND NA NA 2,110 164 NA NA 174 616 297 NA 37,700 ND 1,900 540 8,600
7/20/2010 5,700 NA 46 ND ND ND ND ND ND ND ND ND ND 2,700 140 ND NA 93 540 310 NA 67,000 ND 2,400 650 12,300
5/2/2012 6,400 NA ND ND ND ND ND ND ND ND ND NA NA 1,500 150
ND NA 670 270 200 NA 23,000 ND 1,200 400 5,700
8/4/2014 4,220 <5.0 <0.5 <0.5 <0.5 <0.5 <0.5 ND <0.5 <0.5 <0.5 <0.5 <0.5 1,820 108
NA NA 518 388 173 NA 42,900 ND 1,570 365 7,840
2/16/2015 3,640 <125 <62.5 <62.5 <62.5 <62.5 <62.5 ND <62.5 <62.5 <62.5 <62.5 <62.5 1,110 <62.5 NA 551 695 <250 150 <62.5 21,800 ND 1,120 313 4,190
1/26/2016 2,460 <25 <12.5 <12.5 <12.5 <12.5 <12.5 ND <12.5 <12.5 <12.5 <12.5 14.3J 471 90.7 NA 61.9J 1,360 150 84.7 <12.5 6,870 ND 561 152 1,689
10/27/2016 3,940 <5000 <500 <500 <500 <500 <500 ND <500 <500 <500 <500 <500 3,090 <500 NA <2000 <500 <2000 309J <500 101,000 ND 2,090 619 14,320
4/27/2017 2,330 <50 <50 <50 <50 <50 <50 ND <50 <50 <50 <50 <50 1,380 104 NA <200 606 240J <50 <50 31,000 ND 1,300 373 6,550
2/23/2018 2,010 <500 <50 <50 <50 242 <50 ND <50 <50 <50 <50 <50 971 98.0J NA 711 655 <50 <50 <50 18,700 ND 921 259 3,890
9/26/2019 2,110 <1250 <125 <125 <125 <1250 <125 ND <125 <125 <125 <125 <125 2,790 <125 NA <500 1,420 <125 <125 <125 74,900 ND 2,380 737 15,200
12/4/2020 1,250 <344 <70.6 <49.2 <50 <70.6 <83 <50 <41.4 <52.6 <36.6 <46.2 <66.8 1,100 82J NA <300 314 229J <48.2 <46.4 21,200 <87.2 963 310 5,110
9/20/2022 2,540 <1660 <490 <400 <323 1,110 <540 <340 <384 <322 <355 <272 <308 2,560 <333 NA <1950 <422 <645 <340 <292 95,200 <639 1,710 534 13,430
MW-6
MW-5
3 of 5
TABLE 3
Summary of Groundwater Analytical Results
Former Huffstickler Exxon
Stanley, North Carolina
Terracon Project No. 71149635B
NCDEQ Incident No. 3627
6200B
Well/Sample
I.D.
Date Collected
(mm/dd/yy)
1 100 70 70 70 70 3 200 70 0.4 0.6 0.02 70 600 70 25 5 20 6 70 0.7 600 70 400 400 500
5,000 100,000 5,900 8,800 14,750 70,000 3,000 61,500 70,000 400 600 50 70,000 80,000 30,500 11,700 5,000 20,000 6,000 26,100 700 260,000 24,500 28,500 24,100 50,000Xylenes (Total)1,3,5-Trimethylbenzenen-PropylbenzeneChloromethane1,3-Dichlorobenzene1,2,4-Trichlorobenzenecis-1,2-DichloroetheneBromomethane1,2-Dibromoethane (EDB)Tetrachloroethene (PCE)TolueneNaphthaleneAnalytical Method
1,2,4-TrimethylbenzeneBenzeneEthylbenzeneIsopropylbenzenesec-Butylbenzenetert-Butylbenzenen-Butylbenzene1,2-DichloroethaneDiisopropyl Ether (DIPE)Contaminant of Concern →1,2-Dichloropropanep-IsopropyltolueneMethyl tert-butyl Ether (MTBE)Methylene ChlorideChloroformGCL (ug/L)
2L Standard (ug/L)
10/18/2007 0.62 NA 1.73 2.1 ND ND ND ND ND ND ND NA NA 0.67 7.59 0.58 NA ND 23.5 2.49 NA 1.02 ND 92.8 7.92 77.8
10/7/2009 ND NA ND ND ND ND ND ND ND ND ND NA NA ND ND NA NA ND ND ND NA ND ND ND ND ND
7/20/2010 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND NA ND 0.20J ND NA ND ND ND ND ND
5/2/2012 ND NA
ND ND ND ND ND ND ND ND ND NA NA ND ND
ND NA ND ND ND NA ND ND ND ND ND
8/4/2014 <0.5 <0.5
<0.5 <0.5 <0.5 <0.5 <0.5 ND <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5
NA NA <0.5 <2.0 <0.5 NA <0.5 ND <0.5 <0.5 <0.5
2/16/2015 <0.5 <0.5
<0.5 <0.5 <0.5 <0.5 <0.5 ND <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5
NA <1.0 <0.5 <1.0 <0.5 2.9 <0.5 ND <0.5 <0.5 <0.5
1/26/2016 <0.5 <0.5
<0.5 <0.5 <0.5 <0.5 <0.5 ND <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5
NA <1.0 <0.5 <1.0 <0.5 1.7 <0.5 ND <0.5 <0.5 <1.5
10/27/2016 <0.5 <5.0
<0.5 <0.5 <0.5 <0.5 <0.5 ND <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 NA <2.0 <0.5 <2.0 <0.5 1.4 0.38J ND <0.5 <0.5 <1.0
4/27/2017 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 ND <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25
NA <1.0 <0.25 <1.0 <0.25 1.3 <0.25 ND <0.25 <0.25 <0.50
2/23/2018 <0.25 <2.5 <0.25 <0.25 <0.25 <0.25 <0.25 ND <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25
NA <1.0 <0.25 <1.0 <0.25 0.47J <0.25 ND <0.25 <0.25 <0.50
9/26/2019 <0.25 <2.5 <0.25 <0.25 <0.25 <0.25 <0.25 ND <0.25 <0.25 <0.25 <0.25 <0.25 <0.25 <0.25
NA <1.0 <0.25 <1.0 <0.25 <0.25 <0.25 ND <0.25 <0.25 <0.50
12/4/2020 <0.24 <1.7 <0.35 <0.25 <0.25 <0.35 <0.42 <0.25 <0.21 <0.26 <0.18 <0.23 <0.33 <0.24 <0.24
NA <1.5 <0.44 <0.66 <0.24 <0.23 <0.23 <0.44 <0.19 <0.23 <0.24
9/20/2022 <0.34 <1.7 <0.49 <0.40 <0.32 22.9 <0.54 <0.34 <0.38 <0.32 <0.36 <0.27 <0.31 <0.30 <0.33
NA <2.0 <0.42 <0.64 <0.34 <0.29 <0.48 <0.64 <0.50 <0.33 <1.05
10/7/2009 3,160 NA ND ND ND ND ND ND ND 43.6 ND NA NA 2,790 109 NA NA 241 473 308 NA 24,800 ND 3,440 956 9,880
7/20/2010 130 NA 82 ND ND ND ND ND ND ND ND ND ND 2,500 140 50 NA ND 570 440 NA 18,000 ND 3,600 710 12,900
5/2/2012 280 NA ND ND ND ND ND ND ND ND ND NA NA 2,700 100 ND NA ND 320 290 NA 28,000 ND 1,900 510 14,200
8/4/2014 170 51.7 <0.5 <0.5 <0.5 <0.5 <0.5 ND <0.5 <0.5 <0.5 <0.5 <0.5 1,830 84.5 NA NA <0.5 479 221 NA 18,400 ND 1,750 395 11,610
2/16/2015 327 <62.5 <31.2 <31.2 <31.2 <31.2 <31.2 ND <31.2 <31.2 <31.2 <31.2 <31.2 2,440 105 NA 277 <31.2 451 277 <31.2 23,700 ND 2,280 497 12,090
1/26/2016 739 <62.5 <31.2 <31.2 <31.2 <31.2 <31.2 ND <31.2 <31.2 <31.2 <31.2 <31.2 3,070 113 NA <125 <31.2 589 341 <31.2 35,100 ND 2,580 576 13,850
10/27/2016 1,090 <2500 <250 <250 <250 <250 <250 ND <250 <250 <250 <250 <250 4,070 147J NA <1000 <250 690J 435 <250 69,300 ND 3,210 840 20,330
4/27/2017 1,170 <125 <125 <125 <125 <125 <125 ND <125 <125 <125 <125 <125 3,320 132J NA <500 <125 597J <125 <125 59,500 ND 2,660 <125 16,080
2/23/2018 1,590 <1250 <125 <125 <125 586 <125 ND <125 <125 <125 <125 <125 3,260 <125 NA <500 <125 566J <125 <125 75,500 ND 2,620 712 16,920
9/26/2019 603 <625 <62.5 <62.5 <62.5 <625 <62.5 ND <62.5 <62.5 <62.5 <6.25 <62.5 2,220 103J NA <250 <62.5 390J <62.5 <62.5 30,900 ND 2,070 <62.5 10,540
12/4/2020 330 <86 <17.6 <12.3 <12.5 <17.6 <20.8 <12.5 <10.4 <13.2 <9.2 <11.6 <16.7 1,370 68.5 NA <75 <22.2 288 <12 <11.6 6,250 <21.8 1,500 443 5,320
9/20/2022 669 <415 <122 <100 <80.8 <108 <135 <85.0 <96.0 <80.5 <88.8 <68.0 <77.0 2,370 115 NA <488 <106 417 323 <73.0 34,200 <160 2,470 675 10,990
10/7/2009 456 NA ND 18.7 ND ND ND ND ND ND ND NA NA 3,900 184 NA NA ND 561 455 NA 43,000 ND 3,840 865 20,540
7/20/2010 3,300 NA 97 27 ND ND ND ND ND ND ND 13J ND 3,600 170 58 NA 310 760 580 NA 26,000 ND 4,200 1,200 14,500
5/2/2012 4,800 NA ND ND ND ND ND ND ND ND ND NA NA 4,600 140 ND NA 360 530 430 NA 34,000 ND 3,300 990 14,300
8/4/2014 2,840 27.1 <0.5 <0.5 <0.5 <0.5 <0.5 ND <0.5 36.3 <0.5 15.1 12.3 3,090 103 NA NA 406 655 271 NA 25,400 ND 2,450 663 12,490
2/16/2015 3,270 <125 <62.5 <62.5 <62.5 <62.5 <62.5 ND <62.5 <62.5 <62.5 <62.5 <62.5 3,250 <62.5 NA 671 306 552 312 <62.5 20,200 ND 2,390 692 10,480
1/26/2016 2,930 <31.2 <31.2 <31.2 <31.2 <31.2 <31.2 ND <31.2 45.5J <31.2 <31.2 <31.2 3,320 119 NA <125 346 772 377 <31.2 19,100 ND 2,540 831 10,500
10/27/2016 2,280 <1250 <125 <125 <125 <125 <125 ND <125 <125 <125 <125 <125 3,970 147 NA <500 217 929 439 <125 37,700 ND 3,550 959 20,070
4/27/2017 2,620 <62.5 <62.5 <62.5 <62.5 <62.5 <62.5 ND <62.5 <62.5 <62.5 <62.5 <62.5 3,960 146 NA <250 231 810 <62.5 <62.5 24,000 ND 3,030 945 14,140
2/23/2018 2,960 <125 <12.5 <12.5 <12.5 <12.5 <12.5 ND <12.5 30.9 <12.5 <12.5 <12.5 2,960 124 NA <50 273 695 <12.5 <12.5 5,940 ND 1,850 810 6,030
9/26/2019 1,790 <312 <31.2 <31.2 <31.2 <312 <31.2 ND <31.2 <31.2 <31.2 <31.2 <31.2 2,680 112 NA <125 438 612 <31.2 <31.2 24,600 ND 2,400 <312.2 14,930
12/4/2020 1,310 <215 <44.1 <30.8 <31.2 <44.1 <51.9 <31.2 <25.9 37.4J <22.9 <28.9 <41.8 2,880 133 NA <188 176 864 <30.1 <29 20,200 <54.5 3,410 947 15,140
9/20/2022 1,950 <415 <122 <100 <80.8 <108 <135 <85.0 <96.0 <80.5 <88.8 <68.0 <77.0 3,650 141 NA <488 <106 753 389 <73.0 32,600 <160 3,080 909 16,990
MW-9
MW-8
MW-7
4 of 5
TABLE 3
Summary of Groundwater Analytical Results
Former Huffstickler Exxon
Stanley, North Carolina
Terracon Project No. 71149635B
NCDEQ Incident No. 3627
6200B
Well/Sample
I.D.
Date Collected
(mm/dd/yy)
1 100 70 70 70 70 3 200 70 0.4 0.6 0.02 70 600 70 25 5 20 6 70 0.7 600 70 400 400 500
5,000 100,000 5,900 8,800 14,750 70,000 3,000 61,500 70,000 400 600 50 70,000 80,000 30,500 11,700 5,000 20,000 6,000 26,100 700 260,000 24,500 28,500 24,100 50,000Xylenes (Total)1,3,5-Trimethylbenzenen-PropylbenzeneChloromethane1,3-Dichlorobenzene1,2,4-Trichlorobenzenecis-1,2-DichloroetheneBromomethane1,2-Dibromoethane (EDB)Tetrachloroethene (PCE)TolueneNaphthaleneAnalytical Method
1,2,4-TrimethylbenzeneBenzeneEthylbenzeneIsopropylbenzenesec-Butylbenzenetert-Butylbenzenen-Butylbenzene1,2-DichloroethaneDiisopropyl Ether (DIPE)Contaminant of Concern →1,2-Dichloropropanep-IsopropyltolueneMethyl tert-butyl Ether (MTBE)Methylene ChlorideChloroformGCL (ug/L)
2L Standard (ug/L)
1/16/2007 ND NA ND ND ND ND ND ND ND ND ND NA NA ND ND ND NA ND ND ND NA ND ND ND ND ND
8/4/2014 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ND <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 NA NA <0.5 <0.5 <0.5 NA <0.5 ND <0.5 <0.5 <0.5
WSW-2 1/16/2007 ND NA ND ND ND ND ND ND ND ND ND NA NA ND ND ND NA 1.42 ND ND NA ND ND ND ND ND
ND = not detected (Detection limits are unknown for sampling conducted prior to Terracon's involvement with the site.)
< = less than method detection limit
NS = not sampled.
NE = standard not established.
NA = not analyzed.
Bold font indicates concentration exceeds the 2L standard.
Yellow shading indicates concentration exceeds the GCL
J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
WSW-1
5 of 5

APPENDIX B

APPENDIX C
#=CL#
May 26, 2023
LIMS USE: FR - CHRIS WARD
LIMS OBJECT ID: 92668455
92668455
Project:
Pace Project No.:
RE:
Chris Ward
ESP Associates
3475 Lakemont Boulevard
Fort Mill, SC 29708
FORMER HUFFSTICKLER EXXON
Dear Chris Ward:
Enclosed are the analytical results for sample(s) received by the laboratory on May 19, 2023. The results relate only to the
samples included in this report. Results reported herein conform to the applicable TNI/NELAC Standards and the
laboratory's Quality Manual, where applicable, unless otherwise noted in the body of the report.
The test results provided in this final report were generated by each of the following laboratories within the Pace Network:
• Pace Analytical Services - Charlotte
If you have any questions concerning this report, please feel free to contact me.
Sincerely,
Bonnie Vang
[e-mail]
Project Manager
[phone]
Enclosures
cc:Account Payable, ESP Associates
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 1 of 39
#=CP#
CERTIFICATIONS
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Pace Analytical Services Charlotte
South Carolina Laboratory ID: 99006
9800 Kincey Ave. Ste 100, Huntersville, NC 28078
North Carolina Drinking Water Certification #: 37706
North Carolina Field Services Certification #: 5342
North Carolina Wastewater Certification #: 12
South Carolina Laboratory ID: 99006
South Carolina Certification #: 99006001
South Carolina Drinking Water Cert. #: 99006003
Florida/NELAP Certification #: E87627
Kentucky UST Certification #: 84
Louisiana DoH Drinking Water #: LA029
Virginia/VELAP Certification #: 460221
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 2 of 39
#=SS#
SAMPLE SUMMARY
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Lab ID Sample ID Matrix Date Collected Date Received
92668455001 MW-1 Water 05/18/23 14:55 05/19/23 16:20
92668455002 MW-2 Water 05/19/23 14:59 05/19/23 16:20
92668455003 MW-3 Water 05/19/23 13:47 05/19/23 16:20
92668455004 MW-5 Water 05/19/23 11:58 05/19/23 16:20
92668455005 MW-6 Water 05/19/23 12:54 05/19/23 16:20
92668455006 MW-7 Water 05/19/23 10:24 05/19/23 16:20
92668455007 MW-8 Water 05/18/23 11:35 05/19/23 16:20
92668455008 MW-9 Water 05/18/23 13:00 05/19/23 16:20
92668455009 FIELD BLANK Water 05/19/23 15:03 05/19/23 16:20
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 3 of 39
#=SA#
SAMPLE ANALYTE COUNT
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Lab ID Sample ID Method
Analytes
Reported LaboratoryAnalysts
92668455001 MW-1 SM 6200B 64 PASI-CSAS
92668455002 MW-2 SM 6200B 64 PASI-CSAS
92668455003 MW-3 SM 6200B 64 PASI-CSAS
92668455004 MW-5 SM 6200B 64 PASI-CSAS
92668455005 MW-6 SM 6200B 64 PASI-CSAS
92668455006 MW-7 SM 6200B 64 PASI-CSAS
92668455007 MW-8 SM 6200B 64 PASI-CSAS
92668455008 MW-9 SM 6200B 64 PASI-CSAS
92668455009 FIELD BLANK SM 6200B 64 PASI-CSAS
PASI-C = Pace Analytical Services - Charlotte
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 4 of 39
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Sample:MW-1 Lab ID:92668455001 Collected:05/18/23 14:55 Received:05/19/23 16:20 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
Benzene 10700 ug/L 05/23/23 17:21 71-43-2250172500
Bromobenzene ND ug/L 05/23/23 17:21 108-86-1250145500
Bromochloromethane ND ug/L 05/23/23 17:21 74-97-5250234500
Bromodichloromethane ND ug/L 05/23/23 17:21 75-27-4250154500
Bromoform ND ug/L 05/23/23 17:21 75-25-2250170500
Bromomethane ND ug/L 05/23/23 17:21 74-83-92500830500
n-Butylbenzene ND ug/L 05/23/23 17:21 104-51-8250245500
sec-Butylbenzene ND ug/L 05/23/23 17:21 135-98-8250200500
tert-Butylbenzene ND ug/L 05/23/23 17:21 98-06-6250162500
Carbon tetrachloride ND ug/L 05/23/23 17:21 56-23-5250166500
Chlorobenzene ND ug/L 05/23/23 17:21 108-90-7250142500
Chloroethane ND ug/L 05/23/23 17:21 75-00-3500324500
Chloroform ND ug/L 05/23/23 17:21 67-66-3250215500
Chloromethane ND ug/L 05/23/23 17:21 74-87-3500270500
2-Chlorotoluene ND ug/L 05/23/23 17:21 95-49-8250160500
4-Chlorotoluene ND ug/L 05/23/23 17:21 106-43-4250162500
1,2-Dibromo-3-chloropropane ND ug/L 05/23/23 17:21 96-12-8500170500
Dibromochloromethane ND ug/L 05/23/23 17:21 124-48-1250180500
1,2-Dibromoethane (EDB)ND ug/L 05/23/23 17:21 106-93-4250136500
Dibromomethane ND ug/L 05/23/23 17:21 74-95-3250197500
1,2-Dichlorobenzene ND ug/L 05/23/23 17:21 95-50-1250170500
1,3-Dichlorobenzene ND ug/L 05/23/23 17:21 541-73-1250170500
1,4-Dichlorobenzene ND ug/L 05/23/23 17:21 106-46-7250166500
Dichlorodifluoromethane ND ug/L 05/23/23 17:21 75-71-8250173500
1,1-Dichloroethane ND ug/L 05/23/23 17:21 75-34-3250184500
1,2-Dichloroethane ND ug/L 05/23/23 17:21 107-06-2250161500
1,1-Dichloroethene ND ug/L 05/23/23 17:21 75-35-4250174500
cis-1,2-Dichloroethene ND ug/L 05/23/23 17:21 156-59-2250192500
trans-1,2-Dichloroethene ND ug/L 05/23/23 17:21 156-60-5250198500
1,2-Dichloropropane ND ug/L 05/23/23 17:21 78-87-5250178500
1,3-Dichloropropane ND ug/L 05/23/23 17:21 142-28-9250142500
2,2-Dichloropropane ND ug/L 05/23/23 17:21 594-20-7250194500
1,1-Dichloropropene ND ug/L 05/23/23 17:21 563-58-6250214500
cis-1,3-Dichloropropene ND ug/L 05/23/23 17:21 10061-01-5250182500
trans-1,3-Dichloropropene ND ug/L 05/23/23 17:21 10061-02-6250182500
Diisopropyl ether 275 ug/L 05/23/23 17:21 108-20-3250154500
Ethanol ND ug/L 05/23/23 17:21 64-17-510000036100500
Ethylbenzene 2300 ug/L 05/23/23 17:21 100-41-4250152500
Hexachloro-1,3-butadiene ND ug/L 05/23/23 17:21 87-68-31000765500
Isopropylbenzene (Cumene)ND ug/L 05/23/23 17:21 98-82-8250166500
Methylene Chloride ND ug/L 05/23/23 17:21 75-09-21000975500
Methyl-tert-butyl ether 11000 ug/L 05/23/23 17:21 1634-04-4250211500
Naphthalene 1010 ug/L 05/23/23 17:21 91-20-31000322500
n-Propylbenzene 225J ug/L 05/23/23 17:21 103-65-1250170500
Styrene ND ug/L 05/23/23 17:21 100-42-5250146500
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 5 of 39
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Sample:MW-1 Lab ID:92668455001 Collected:05/18/23 14:55 Received:05/19/23 16:20 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
1,1,1,2-Tetrachloroethane ND ug/L 05/23/23 17:21 630-20-6250156500
1,1,2,2-Tetrachloroethane ND ug/L 05/23/23 17:21 79-34-5250112500
Tetrachloroethene ND ug/L 05/23/23 17:21 127-18-4250146500
Toluene 99800 ug/L 05/23/23 17:21 108-88-3250120500
1,2,3-Trichlorobenzene ND ug/L 05/23/23 17:21 87-61-61000403500
1,2,4-Trichlorobenzene ND ug/L 05/23/23 17:21 120-82-11000320500
1,1,1-Trichloroethane ND ug/L 05/23/23 17:21 71-55-6250166500
1,1,2-Trichloroethane ND ug/L 05/23/23 17:21 79-00-5250162500
Trichloroethene ND ug/L 05/23/23 17:21 79-01-6250192500
Trichlorofluoromethane ND ug/L 05/23/23 17:21 75-69-4500149500
1,2,3-Trichloropropane ND ug/L 05/23/23 17:21 96-18-4250130500
1,2,4-Trimethylbenzene 2920 ug/L 05/23/23 17:21 95-63-6250248500
1,3,5-Trimethylbenzene 835 ug/L 05/23/23 17:21 108-67-8250166500
Vinyl chloride ND ug/L 05/23/23 17:21 75-01-4500193500
m&p-Xylene 10100 ug/L 05/23/23 17:21 179601-23-1500354500
o-Xylene 4440 ug/L 05/23/23 17:21 95-47-6250169500
Surrogates
1,2-Dichloroethane-d4 (S)102 %05/23/23 17:21 17060-07-070-130 500
4-Bromofluorobenzene (S)94 %05/23/23 17:21 460-00-470-130 500
Toluene-d8 (S)97 %05/23/23 17:21 2037-26-570-130 500
Sample:MW-2 Lab ID:92668455002 Collected:05/19/23 14:59 Received:05/19/23 16:20 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
Benzene 5010 ug/L 05/24/23 15:46 71-43-25003451000
Bromobenzene ND ug/L 05/24/23 15:46 108-86-15002901000
Bromochloromethane ND ug/L 05/24/23 15:46 74-97-55004681000
Bromodichloromethane ND ug/L 05/24/23 15:46 75-27-45003071000
Bromoform ND ug/L 05/24/23 15:46 75-25-25003411000
Bromomethane ND ug/L 05/24/23 15:46 74-83-9500016601000
n-Butylbenzene ND ug/L 05/24/23 15:46 104-51-85004901000
sec-Butylbenzene ND ug/L 05/24/23 15:46 135-98-85004001000
tert-Butylbenzene ND ug/L 05/24/23 15:46 98-06-65003231000
Carbon tetrachloride ND ug/L 05/24/23 15:46 56-23-55003331000
Chlorobenzene ND ug/L 05/24/23 15:46 108-90-75002841000
Chloroethane ND ug/L 05/24/23 15:46 75-00-3 L110006491000
Chloroform ND ug/L 05/24/23 15:46 67-66-35004301000
Chloromethane ND ug/L 05/24/23 15:46 74-87-310005401000
2-Chlorotoluene ND ug/L 05/24/23 15:46 95-49-85003211000
4-Chlorotoluene ND ug/L 05/24/23 15:46 106-43-45003241000
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 6 of 39
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Sample:MW-2 Lab ID:92668455002 Collected:05/19/23 14:59 Received:05/19/23 16:20 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
1,2-Dibromo-3-chloropropane ND ug/L 05/24/23 15:46 96-12-810003401000
Dibromochloromethane ND ug/L 05/24/23 15:46 124-48-15003591000
1,2-Dibromoethane (EDB)ND ug/L 05/24/23 15:46 106-93-45002721000
Dibromomethane ND ug/L 05/24/23 15:46 74-95-35003941000
1,2-Dichlorobenzene ND ug/L 05/24/23 15:46 95-50-15003391000
1,3-Dichlorobenzene ND ug/L 05/24/23 15:46 541-73-15003401000
1,4-Dichlorobenzene ND ug/L 05/24/23 15:46 106-46-75003331000
Dichlorodifluoromethane ND ug/L 05/24/23 15:46 75-71-8 IH,L15003461000
1,1-Dichloroethane ND ug/L 05/24/23 15:46 75-34-35003671000
1,2-Dichloroethane ND ug/L 05/24/23 15:46 107-06-25003221000
1,1-Dichloroethene ND ug/L 05/24/23 15:46 75-35-45003481000
cis-1,2-Dichloroethene ND ug/L 05/24/23 15:46 156-59-25003841000
trans-1,2-Dichloroethene ND ug/L 05/24/23 15:46 156-60-55003961000
1,2-Dichloropropane ND ug/L 05/24/23 15:46 78-87-55003551000
1,3-Dichloropropane ND ug/L 05/24/23 15:46 142-28-95002841000
2,2-Dichloropropane ND ug/L 05/24/23 15:46 594-20-75003881000
1,1-Dichloropropene ND ug/L 05/24/23 15:46 563-58-65004271000
cis-1,3-Dichloropropene ND ug/L 05/24/23 15:46 10061-01-55003651000
trans-1,3-Dichloropropene ND ug/L 05/24/23 15:46 10061-02-65003631000
Diisopropyl ether ND ug/L 05/24/23 15:46 108-20-35003081000
Ethanol ND ug/L 05/24/23 15:46 64-17-5200000722001000
Ethylbenzene 2410 ug/L 05/24/23 15:46 100-41-45003041000
Hexachloro-1,3-butadiene ND ug/L 05/24/23 15:46 87-68-3200015301000
Isopropylbenzene (Cumene)ND ug/L 05/24/23 15:46 98-82-85003331000
Methylene Chloride ND ug/L 05/24/23 15:46 75-09-2200019501000
Methyl-tert-butyl ether 789 ug/L 05/24/23 15:46 1634-04-45004221000
Naphthalene ND ug/L 05/24/23 15:46 91-20-320006451000
n-Propylbenzene ND ug/L 05/24/23 15:46 103-65-15003401000
Styrene ND ug/L 05/24/23 15:46 100-42-55002921000
1,1,1,2-Tetrachloroethane ND ug/L 05/24/23 15:46 630-20-65003111000
1,1,2,2-Tetrachloroethane ND ug/L 05/24/23 15:46 79-34-55002251000
Tetrachloroethene ND ug/L 05/24/23 15:46 127-18-45002921000
Toluene 112000 ug/L 05/24/23 15:46 108-88-35002391000
1,2,3-Trichlorobenzene ND ug/L 05/24/23 15:46 87-61-620008061000
1,2,4-Trichlorobenzene ND ug/L 05/24/23 15:46 120-82-120006391000
1,1,1-Trichloroethane ND ug/L 05/24/23 15:46 71-55-65003321000
1,1,2-Trichloroethane ND ug/L 05/24/23 15:46 79-00-55003251000
Trichloroethene ND ug/L 05/24/23 15:46 79-01-65003831000
Trichlorofluoromethane ND ug/L 05/24/23 15:46 75-69-410002981000
1,2,3-Trichloropropane ND ug/L 05/24/23 15:46 96-18-45002611000
1,2,4-Trimethylbenzene 3470 ug/L 05/24/23 15:46 95-63-65004951000
1,3,5-Trimethylbenzene 1060 ug/L 05/24/23 15:46 108-67-85003321000
Vinyl chloride ND ug/L 05/24/23 15:46 75-01-410003861000
m&p-Xylene 10600 ug/L 05/24/23 15:46 179601-23-110007091000
o-Xylene 5770 ug/L 05/24/23 15:46 95-47-65003381000
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 7 of 39
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Sample:MW-2 Lab ID:92668455002 Collected:05/19/23 14:59 Received:05/19/23 16:20 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
Surrogates
1,2-Dichloroethane-d4 (S)109 %05/24/23 15:46 17060-07-070-130 1000
4-Bromofluorobenzene (S)101 %05/24/23 15:46 460-00-470-130 1000
Toluene-d8 (S)101 %05/24/23 15:46 2037-26-570-130 1000
Sample:MW-3 Lab ID:92668455003 Collected:05/19/23 13:47 Received:05/19/23 16:20 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
Benzene 620 ug/L 05/23/23 16:09 71-43-225.0 17.2 50
Bromobenzene ND ug/L 05/23/23 16:09 108-86-125.0 14.5 50
Bromochloromethane ND ug/L 05/23/23 16:09 74-97-525.0 23.4 50
Bromodichloromethane ND ug/L 05/23/23 16:09 75-27-425.0 15.4 50
Bromoform ND ug/L 05/23/23 16:09 75-25-225.0 17.0 50
Bromomethane ND ug/L 05/23/23 16:09 74-83-925083.0 50
n-Butylbenzene ND ug/L 05/23/23 16:09 104-51-825.0 24.5 50
sec-Butylbenzene ND ug/L 05/23/23 16:09 135-98-825.0 20.0 50
tert-Butylbenzene ND ug/L 05/23/23 16:09 98-06-625.0 16.2 50
Carbon tetrachloride ND ug/L 05/23/23 16:09 56-23-525.0 16.6 50
Chlorobenzene ND ug/L 05/23/23 16:09 108-90-725.0 14.2 50
Chloroethane ND ug/L 05/23/23 16:09 75-00-350.0 32.4 50
Chloroform ND ug/L 05/23/23 16:09 67-66-325.0 21.5 50
Chloromethane ND ug/L 05/23/23 16:09 74-87-350.0 27.0 50
2-Chlorotoluene ND ug/L 05/23/23 16:09 95-49-825.0 16.0 50
4-Chlorotoluene ND ug/L 05/23/23 16:09 106-43-425.0 16.2 50
1,2-Dibromo-3-chloropropane ND ug/L 05/23/23 16:09 96-12-850.0 17.0 50
Dibromochloromethane ND ug/L 05/23/23 16:09 124-48-125.0 18.0 50
1,2-Dibromoethane (EDB)ND ug/L 05/23/23 16:09 106-93-425.0 13.6 50
Dibromomethane ND ug/L 05/23/23 16:09 74-95-325.0 19.7 50
1,2-Dichlorobenzene ND ug/L 05/23/23 16:09 95-50-125.0 17.0 50
1,3-Dichlorobenzene ND ug/L 05/23/23 16:09 541-73-125.0 17.0 50
1,4-Dichlorobenzene ND ug/L 05/23/23 16:09 106-46-725.0 16.6 50
Dichlorodifluoromethane ND ug/L 05/23/23 16:09 75-71-825.0 17.3 50
1,1-Dichloroethane ND ug/L 05/23/23 16:09 75-34-325.0 18.4 50
1,2-Dichloroethane ND ug/L 05/23/23 16:09 107-06-225.0 16.1 50
1,1-Dichloroethene ND ug/L 05/23/23 16:09 75-35-425.0 17.4 50
cis-1,2-Dichloroethene ND ug/L 05/23/23 16:09 156-59-225.0 19.2 50
trans-1,2-Dichloroethene ND ug/L 05/23/23 16:09 156-60-525.0 19.8 50
1,2-Dichloropropane ND ug/L 05/23/23 16:09 78-87-525.0 17.8 50
1,3-Dichloropropane ND ug/L 05/23/23 16:09 142-28-925.0 14.2 50
2,2-Dichloropropane ND ug/L 05/23/23 16:09 594-20-725.0 19.4 50
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 8 of 39
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Sample:MW-3 Lab ID:92668455003 Collected:05/19/23 13:47 Received:05/19/23 16:20 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
1,1-Dichloropropene ND ug/L 05/23/23 16:09 563-58-625.0 21.4 50
cis-1,3-Dichloropropene ND ug/L 05/23/23 16:09 10061-01-525.0 18.2 50
trans-1,3-Dichloropropene ND ug/L 05/23/23 16:09 10061-02-625.0 18.2 50
Diisopropyl ether ND ug/L 05/23/23 16:09 108-20-325.0 15.4 50
Ethanol ND ug/L 05/23/23 16:09 64-17-510000361050
Ethylbenzene 1480 ug/L 05/23/23 16:09 100-41-425.0 15.2 50
Hexachloro-1,3-butadiene ND ug/L 05/23/23 16:09 87-68-310076.5 50
Isopropylbenzene (Cumene)155 ug/L 05/23/23 16:09 98-82-825.0 16.6 50
Methylene Chloride ND ug/L 05/23/23 16:09 75-09-210097.5 50
Methyl-tert-butyl ether 611 ug/L 05/23/23 16:09 1634-04-425.0 21.1 50
Naphthalene 680 ug/L 05/23/23 16:09 91-20-310032.2 50
n-Propylbenzene 481 ug/L 05/23/23 16:09 103-65-125.0 17.0 50
Styrene ND ug/L 05/23/23 16:09 100-42-525.0 14.6 50
1,1,1,2-Tetrachloroethane ND ug/L 05/23/23 16:09 630-20-625.0 15.6 50
1,1,2,2-Tetrachloroethane ND ug/L 05/23/23 16:09 79-34-525.0 11.2 50
Tetrachloroethene ND ug/L 05/23/23 16:09 127-18-425.0 14.6 50
Toluene 6920 ug/L 05/23/23 16:09 108-88-325.0 12.0 50
1,2,3-Trichlorobenzene ND ug/L 05/23/23 16:09 87-61-610040.3 50
1,2,4-Trichlorobenzene ND ug/L 05/23/23 16:09 120-82-110032.0 50
1,1,1-Trichloroethane ND ug/L 05/23/23 16:09 71-55-625.0 16.6 50
1,1,2-Trichloroethane ND ug/L 05/23/23 16:09 79-00-525.0 16.2 50
Trichloroethene ND ug/L 05/23/23 16:09 79-01-625.0 19.2 50
Trichlorofluoromethane ND ug/L 05/23/23 16:09 75-69-450.0 14.9 50
1,2,3-Trichloropropane ND ug/L 05/23/23 16:09 96-18-425.0 13.0 50
1,2,4-Trimethylbenzene 3690 ug/L 05/23/23 16:09 95-63-625.0 24.8 50
1,3,5-Trimethylbenzene 1150 ug/L 05/23/23 16:09 108-67-825.0 16.6 50
Vinyl chloride ND ug/L 05/23/23 16:09 75-01-450.0 19.3 50
m&p-Xylene 3810 ug/L 05/23/23 16:09 179601-23-150.0 35.4 50
o-Xylene 1580 ug/L 05/23/23 16:09 95-47-625.0 16.9 50
Surrogates
1,2-Dichloroethane-d4 (S)100 %05/23/23 16:09 17060-07-070-130 50
4-Bromofluorobenzene (S)96 %05/23/23 16:09 460-00-470-130 50
Toluene-d8 (S)102 %05/23/23 16:09 2037-26-570-130 50
Sample:MW-5 Lab ID:92668455004 Collected:05/19/23 11:58 Received:05/19/23 16:20 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
Benzene ND ug/L 05/23/23 12:32 71-43-20.50 0.34 1
Bromobenzene ND ug/L 05/23/23 12:32 108-86-10.50 0.29 1
Bromochloromethane ND ug/L 05/23/23 12:32 74-97-50.50 0.47 1
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 9 of 39
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Sample:MW-5 Lab ID:92668455004 Collected:05/19/23 11:58 Received:05/19/23 16:20 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
Bromodichloromethane ND ug/L 05/23/23 12:32 75-27-40.50 0.31 1
Bromoform ND ug/L 05/23/23 12:32 75-25-20.50 0.34 1
Bromomethane ND ug/L 05/23/23 12:32 74-83-95.0 1.7 1
n-Butylbenzene ND ug/L 05/23/23 12:32 104-51-80.50 0.49 1
sec-Butylbenzene ND ug/L 05/23/23 12:32 135-98-80.50 0.40 1
tert-Butylbenzene ND ug/L 05/23/23 12:32 98-06-60.50 0.32 1
Carbon tetrachloride ND ug/L 05/23/23 12:32 56-23-50.50 0.33 1
Chlorobenzene ND ug/L 05/23/23 12:32 108-90-70.50 0.28 1
Chloroethane ND ug/L 05/23/23 12:32 75-00-31.0 0.65 1
Chloroform ND ug/L 05/23/23 12:32 67-66-30.50 0.43 1
Chloromethane ND ug/L 05/23/23 12:32 74-87-31.0 0.54 1
2-Chlorotoluene ND ug/L 05/23/23 12:32 95-49-80.50 0.32 1
4-Chlorotoluene ND ug/L 05/23/23 12:32 106-43-40.50 0.32 1
1,2-Dibromo-3-chloropropane ND ug/L 05/23/23 12:32 96-12-81.0 0.34 1
Dibromochloromethane ND ug/L 05/23/23 12:32 124-48-10.50 0.36 1
1,2-Dibromoethane (EDB)ND ug/L 05/23/23 12:32 106-93-40.50 0.27 1
Dibromomethane ND ug/L 05/23/23 12:32 74-95-30.50 0.39 1
1,2-Dichlorobenzene ND ug/L 05/23/23 12:32 95-50-10.50 0.34 1
1,3-Dichlorobenzene ND ug/L 05/23/23 12:32 541-73-10.50 0.34 1
1,4-Dichlorobenzene ND ug/L 05/23/23 12:32 106-46-70.50 0.33 1
Dichlorodifluoromethane ND ug/L 05/23/23 12:32 75-71-80.50 0.35 1
1,1-Dichloroethane ND ug/L 05/23/23 12:32 75-34-30.50 0.37 1
1,2-Dichloroethane ND ug/L 05/23/23 12:32 107-06-20.50 0.32 1
1,1-Dichloroethene ND ug/L 05/23/23 12:32 75-35-40.50 0.35 1
cis-1,2-Dichloroethene ND ug/L 05/23/23 12:32 156-59-20.50 0.38 1
trans-1,2-Dichloroethene ND ug/L 05/23/23 12:32 156-60-50.50 0.40 1
1,2-Dichloropropane ND ug/L 05/23/23 12:32 78-87-50.50 0.36 1
1,3-Dichloropropane ND ug/L 05/23/23 12:32 142-28-90.50 0.28 1
2,2-Dichloropropane ND ug/L 05/23/23 12:32 594-20-70.50 0.39 1
1,1-Dichloropropene ND ug/L 05/23/23 12:32 563-58-60.50 0.43 1
cis-1,3-Dichloropropene ND ug/L 05/23/23 12:32 10061-01-50.50 0.36 1
trans-1,3-Dichloropropene ND ug/L 05/23/23 12:32 10061-02-60.50 0.36 1
Diisopropyl ether ND ug/L 05/23/23 12:32 108-20-30.50 0.31 1
Ethanol ND ug/L 05/23/23 12:32 64-17-520072.2 1
Ethylbenzene ND ug/L 05/23/23 12:32 100-41-40.50 0.30 1
Hexachloro-1,3-butadiene ND ug/L 05/23/23 12:32 87-68-32.0 1.5 1
Isopropylbenzene (Cumene)ND ug/L 05/23/23 12:32 98-82-80.50 0.33 1
Methylene Chloride ND ug/L 05/23/23 12:32 75-09-22.0 2.0 1
Methyl-tert-butyl ether ND ug/L 05/23/23 12:32 1634-04-40.50 0.42 1
Naphthalene ND ug/L 05/23/23 12:32 91-20-32.0 0.64 1
n-Propylbenzene ND ug/L 05/23/23 12:32 103-65-10.50 0.34 1
Styrene ND ug/L 05/23/23 12:32 100-42-50.50 0.29 1
1,1,1,2-Tetrachloroethane ND ug/L 05/23/23 12:32 630-20-60.50 0.31 1
1,1,2,2-Tetrachloroethane ND ug/L 05/23/23 12:32 79-34-50.50 0.22 1
Tetrachloroethene ND ug/L 05/23/23 12:32 127-18-40.50 0.29 1
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 10 of 39
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Sample:MW-5 Lab ID:92668455004 Collected:05/19/23 11:58 Received:05/19/23 16:20 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
Toluene ND ug/L 05/23/23 12:32 108-88-30.50 0.24 1
1,2,3-Trichlorobenzene ND ug/L 05/23/23 12:32 87-61-62.0 0.81 1
1,2,4-Trichlorobenzene ND ug/L 05/23/23 12:32 120-82-12.0 0.64 1
1,1,1-Trichloroethane ND ug/L 05/23/23 12:32 71-55-60.50 0.33 1
1,1,2-Trichloroethane ND ug/L 05/23/23 12:32 79-00-50.50 0.32 1
Trichloroethene ND ug/L 05/23/23 12:32 79-01-60.50 0.38 1
Trichlorofluoromethane ND ug/L 05/23/23 12:32 75-69-41.0 0.30 1
1,2,3-Trichloropropane ND ug/L 05/23/23 12:32 96-18-40.50 0.26 1
1,2,4-Trimethylbenzene ND ug/L 05/23/23 12:32 95-63-60.50 0.50 1
1,3,5-Trimethylbenzene ND ug/L 05/23/23 12:32 108-67-80.50 0.33 1
Vinyl chloride ND ug/L 05/23/23 12:32 75-01-41.0 0.39 1
m&p-Xylene ND ug/L 05/23/23 12:32 179601-23-11.0 0.71 1
o-Xylene ND ug/L 05/23/23 12:32 95-47-60.50 0.34 1
Surrogates
1,2-Dichloroethane-d4 (S)106 %05/23/23 12:32 17060-07-070-130 1
4-Bromofluorobenzene (S)99 %05/23/23 12:32 460-00-470-130 1
Toluene-d8 (S)106 %05/23/23 12:32 2037-26-570-130 1
Sample:MW-6 Lab ID:92668455005 Collected:05/19/23 12:54 Received:05/19/23 16:20 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
Benzene 3710 ug/L 05/24/23 16:04 71-43-25003451000
Bromobenzene ND ug/L 05/24/23 16:04 108-86-15002901000
Bromochloromethane ND ug/L 05/24/23 16:04 74-97-55004681000
Bromodichloromethane ND ug/L 05/24/23 16:04 75-27-45003071000
Bromoform ND ug/L 05/24/23 16:04 75-25-25003411000
Bromomethane ND ug/L 05/24/23 16:04 74-83-9500016601000
n-Butylbenzene ND ug/L 05/24/23 16:04 104-51-85004901000
sec-Butylbenzene ND ug/L 05/24/23 16:04 135-98-85004001000
tert-Butylbenzene ND ug/L 05/24/23 16:04 98-06-65003231000
Carbon tetrachloride ND ug/L 05/24/23 16:04 56-23-55003331000
Chlorobenzene ND ug/L 05/24/23 16:04 108-90-75002841000
Chloroethane ND ug/L 05/24/23 16:04 75-00-3 L110006491000
Chloroform ND ug/L 05/24/23 16:04 67-66-35004301000
Chloromethane ND ug/L 05/24/23 16:04 74-87-310005401000
2-Chlorotoluene ND ug/L 05/24/23 16:04 95-49-85003211000
4-Chlorotoluene ND ug/L 05/24/23 16:04 106-43-45003241000
1,2-Dibromo-3-chloropropane ND ug/L 05/24/23 16:04 96-12-810003401000
Dibromochloromethane ND ug/L 05/24/23 16:04 124-48-15003591000
1,2-Dibromoethane (EDB)ND ug/L 05/24/23 16:04 106-93-45002721000
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 11 of 39
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Sample:MW-6 Lab ID:92668455005 Collected:05/19/23 12:54 Received:05/19/23 16:20 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
Dibromomethane ND ug/L 05/24/23 16:04 74-95-35003941000
1,2-Dichlorobenzene ND ug/L 05/24/23 16:04 95-50-15003391000
1,3-Dichlorobenzene ND ug/L 05/24/23 16:04 541-73-15003401000
1,4-Dichlorobenzene ND ug/L 05/24/23 16:04 106-46-75003331000
Dichlorodifluoromethane ND ug/L 05/24/23 16:04 75-71-8 IH,L15003461000
1,1-Dichloroethane ND ug/L 05/24/23 16:04 75-34-35003671000
1,2-Dichloroethane ND ug/L 05/24/23 16:04 107-06-25003221000
1,1-Dichloroethene ND ug/L 05/24/23 16:04 75-35-45003481000
cis-1,2-Dichloroethene ND ug/L 05/24/23 16:04 156-59-25003841000
trans-1,2-Dichloroethene ND ug/L 05/24/23 16:04 156-60-55003961000
1,2-Dichloropropane ND ug/L 05/24/23 16:04 78-87-55003551000
1,3-Dichloropropane ND ug/L 05/24/23 16:04 142-28-95002841000
2,2-Dichloropropane ND ug/L 05/24/23 16:04 594-20-75003881000
1,1-Dichloropropene ND ug/L 05/24/23 16:04 563-58-65004271000
cis-1,3-Dichloropropene ND ug/L 05/24/23 16:04 10061-01-55003651000
trans-1,3-Dichloropropene ND ug/L 05/24/23 16:04 10061-02-65003631000
Diisopropyl ether ND ug/L 05/24/23 16:04 108-20-35003081000
Ethanol ND ug/L 05/24/23 16:04 64-17-5200000722001000
Ethylbenzene 2710 ug/L 05/24/23 16:04 100-41-45003041000
Hexachloro-1,3-butadiene ND ug/L 05/24/23 16:04 87-68-3200015301000
Isopropylbenzene (Cumene)ND ug/L 05/24/23 16:04 98-82-85003331000
Methylene Chloride ND ug/L 05/24/23 16:04 75-09-2200019501000
Methyl-tert-butyl ether ND ug/L 05/24/23 16:04 1634-04-45004221000
Naphthalene ND ug/L 05/24/23 16:04 91-20-320006451000
n-Propylbenzene ND ug/L 05/24/23 16:04 103-65-15003401000
Styrene ND ug/L 05/24/23 16:04 100-42-55002921000
1,1,1,2-Tetrachloroethane ND ug/L 05/24/23 16:04 630-20-65003111000
1,1,2,2-Tetrachloroethane ND ug/L 05/24/23 16:04 79-34-55002251000
Tetrachloroethene ND ug/L 05/24/23 16:04 127-18-45002921000
Toluene 106000 ug/L 05/24/23 16:04 108-88-35002391000
1,2,3-Trichlorobenzene ND ug/L 05/24/23 16:04 87-61-620008061000
1,2,4-Trichlorobenzene ND ug/L 05/24/23 16:04 120-82-120006391000
1,1,1-Trichloroethane ND ug/L 05/24/23 16:04 71-55-65003321000
1,1,2-Trichloroethane ND ug/L 05/24/23 16:04 79-00-55003251000
Trichloroethene ND ug/L 05/24/23 16:04 79-01-65003831000
Trichlorofluoromethane ND ug/L 05/24/23 16:04 75-69-410002981000
1,2,3-Trichloropropane ND ug/L 05/24/23 16:04 96-18-45002611000
1,2,4-Trimethylbenzene 1780 ug/L 05/24/23 16:04 95-63-65004951000
1,3,5-Trimethylbenzene 634 ug/L 05/24/23 16:04 108-67-85003321000
Vinyl chloride ND ug/L 05/24/23 16:04 75-01-410003861000
m&p-Xylene 9200 ug/L 05/24/23 16:04 179601-23-110007091000
o-Xylene 4250 ug/L 05/24/23 16:04 95-47-65003381000
Surrogates
1,2-Dichloroethane-d4 (S)117 %05/24/23 16:04 17060-07-070-130 1000
4-Bromofluorobenzene (S)101 %05/24/23 16:04 460-00-470-130 1000
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 12 of 39
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Sample:MW-6 Lab ID:92668455005 Collected:05/19/23 12:54 Received:05/19/23 16:20 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
Surrogates
Toluene-d8 (S)107 %05/24/23 16:04 2037-26-570-130 1000
Sample:MW-7 Lab ID:92668455006 Collected:05/19/23 10:24 Received:05/19/23 16:20 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
Benzene ND ug/L 05/23/23 12:50 71-43-20.50 0.34 1
Bromobenzene ND ug/L 05/23/23 12:50 108-86-10.50 0.29 1
Bromochloromethane ND ug/L 05/23/23 12:50 74-97-50.50 0.47 1
Bromodichloromethane ND ug/L 05/23/23 12:50 75-27-40.50 0.31 1
Bromoform ND ug/L 05/23/23 12:50 75-25-20.50 0.34 1
Bromomethane ND ug/L 05/23/23 12:50 74-83-95.0 1.7 1
n-Butylbenzene ND ug/L 05/23/23 12:50 104-51-80.50 0.49 1
sec-Butylbenzene ND ug/L 05/23/23 12:50 135-98-80.50 0.40 1
tert-Butylbenzene ND ug/L 05/23/23 12:50 98-06-60.50 0.32 1
Carbon tetrachloride ND ug/L 05/23/23 12:50 56-23-50.50 0.33 1
Chlorobenzene ND ug/L 05/23/23 12:50 108-90-70.50 0.28 1
Chloroethane ND ug/L 05/23/23 12:50 75-00-31.0 0.65 1
Chloroform 25.2 ug/L 05/23/23 12:50 67-66-30.50 0.43 1
Chloromethane ND ug/L 05/23/23 12:50 74-87-31.0 0.54 1
2-Chlorotoluene ND ug/L 05/23/23 12:50 95-49-80.50 0.32 1
4-Chlorotoluene ND ug/L 05/23/23 12:50 106-43-40.50 0.32 1
1,2-Dibromo-3-chloropropane ND ug/L 05/23/23 12:50 96-12-81.0 0.34 1
Dibromochloromethane ND ug/L 05/23/23 12:50 124-48-10.50 0.36 1
1,2-Dibromoethane (EDB)ND ug/L 05/23/23 12:50 106-93-40.50 0.27 1
Dibromomethane ND ug/L 05/23/23 12:50 74-95-30.50 0.39 1
1,2-Dichlorobenzene ND ug/L 05/23/23 12:50 95-50-10.50 0.34 1
1,3-Dichlorobenzene ND ug/L 05/23/23 12:50 541-73-10.50 0.34 1
1,4-Dichlorobenzene ND ug/L 05/23/23 12:50 106-46-70.50 0.33 1
Dichlorodifluoromethane ND ug/L 05/23/23 12:50 75-71-80.50 0.35 1
1,1-Dichloroethane ND ug/L 05/23/23 12:50 75-34-30.50 0.37 1
1,2-Dichloroethane ND ug/L 05/23/23 12:50 107-06-20.50 0.32 1
1,1-Dichloroethene ND ug/L 05/23/23 12:50 75-35-40.50 0.35 1
cis-1,2-Dichloroethene ND ug/L 05/23/23 12:50 156-59-20.50 0.38 1
trans-1,2-Dichloroethene ND ug/L 05/23/23 12:50 156-60-50.50 0.40 1
1,2-Dichloropropane ND ug/L 05/23/23 12:50 78-87-50.50 0.36 1
1,3-Dichloropropane ND ug/L 05/23/23 12:50 142-28-90.50 0.28 1
2,2-Dichloropropane ND ug/L 05/23/23 12:50 594-20-70.50 0.39 1
1,1-Dichloropropene ND ug/L 05/23/23 12:50 563-58-60.50 0.43 1
cis-1,3-Dichloropropene ND ug/L 05/23/23 12:50 10061-01-50.50 0.36 1
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 13 of 39
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Sample:MW-7 Lab ID:92668455006 Collected:05/19/23 10:24 Received:05/19/23 16:20 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
trans-1,3-Dichloropropene ND ug/L 05/23/23 12:50 10061-02-60.50 0.36 1
Diisopropyl ether ND ug/L 05/23/23 12:50 108-20-30.50 0.31 1
Ethanol ND ug/L 05/23/23 12:50 64-17-520072.2 1
Ethylbenzene ND ug/L 05/23/23 12:50 100-41-40.50 0.30 1
Hexachloro-1,3-butadiene ND ug/L 05/23/23 12:50 87-68-32.0 1.5 1
Isopropylbenzene (Cumene)ND ug/L 05/23/23 12:50 98-82-80.50 0.33 1
Methylene Chloride ND ug/L 05/23/23 12:50 75-09-22.0 2.0 1
Methyl-tert-butyl ether ND ug/L 05/23/23 12:50 1634-04-40.50 0.42 1
Naphthalene ND ug/L 05/23/23 12:50 91-20-32.0 0.64 1
n-Propylbenzene ND ug/L 05/23/23 12:50 103-65-10.50 0.34 1
Styrene ND ug/L 05/23/23 12:50 100-42-50.50 0.29 1
1,1,1,2-Tetrachloroethane ND ug/L 05/23/23 12:50 630-20-60.50 0.31 1
1,1,2,2-Tetrachloroethane ND ug/L 05/23/23 12:50 79-34-50.50 0.22 1
Tetrachloroethene ND ug/L 05/23/23 12:50 127-18-40.50 0.29 1
Toluene 0.78 ug/L 05/23/23 12:50 108-88-30.50 0.24 1
1,2,3-Trichlorobenzene ND ug/L 05/23/23 12:50 87-61-62.0 0.81 1
1,2,4-Trichlorobenzene ND ug/L 05/23/23 12:50 120-82-12.0 0.64 1
1,1,1-Trichloroethane ND ug/L 05/23/23 12:50 71-55-60.50 0.33 1
1,1,2-Trichloroethane ND ug/L 05/23/23 12:50 79-00-50.50 0.32 1
Trichloroethene ND ug/L 05/23/23 12:50 79-01-60.50 0.38 1
Trichlorofluoromethane ND ug/L 05/23/23 12:50 75-69-41.0 0.30 1
1,2,3-Trichloropropane ND ug/L 05/23/23 12:50 96-18-40.50 0.26 1
1,2,4-Trimethylbenzene ND ug/L 05/23/23 12:50 95-63-60.50 0.50 1
1,3,5-Trimethylbenzene ND ug/L 05/23/23 12:50 108-67-80.50 0.33 1
Vinyl chloride ND ug/L 05/23/23 12:50 75-01-41.0 0.39 1
m&p-Xylene ND ug/L 05/23/23 12:50 179601-23-11.0 0.71 1
o-Xylene ND ug/L 05/23/23 12:50 95-47-60.50 0.34 1
Surrogates
1,2-Dichloroethane-d4 (S)107 %05/23/23 12:50 17060-07-070-130 1
4-Bromofluorobenzene (S)98 %05/23/23 12:50 460-00-470-130 1
Toluene-d8 (S)105 %05/23/23 12:50 2037-26-570-130 1
Sample:MW-8 Lab ID:92668455007 Collected:05/18/23 11:35 Received:05/19/23 16:20 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
Benzene 536 ug/L 05/24/23 14:52 71-43-262.5 43.1 125
Bromobenzene ND ug/L 05/24/23 14:52 108-86-162.5 36.2 125
Bromochloromethane ND ug/L 05/24/23 14:52 74-97-562.5 58.5 125
Bromodichloromethane ND ug/L 05/24/23 14:52 75-27-462.5 38.4 125
Bromoform ND ug/L 05/24/23 14:52 75-25-262.5 42.6 125
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 14 of 39
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Sample:MW-8 Lab ID:92668455007 Collected:05/18/23 11:35 Received:05/19/23 16:20 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
Bromomethane ND ug/L 05/24/23 14:52 74-83-9625208125
n-Butylbenzene ND ug/L 05/24/23 14:52 104-51-862.5 61.2 125
sec-Butylbenzene ND ug/L 05/24/23 14:52 135-98-862.5 50.0 125
tert-Butylbenzene ND ug/L 05/24/23 14:52 98-06-662.5 40.4 125
Carbon tetrachloride ND ug/L 05/24/23 14:52 56-23-562.5 41.6 125
Chlorobenzene ND ug/L 05/24/23 14:52 108-90-762.5 35.5 125
Chloroethane ND ug/L 05/24/23 14:52 75-00-3 L112581.1 125
Chloroform ND ug/L 05/24/23 14:52 67-66-362.5 53.8 125
Chloromethane ND ug/L 05/24/23 14:52 74-87-312567.5 125
2-Chlorotoluene ND ug/L 05/24/23 14:52 95-49-862.5 40.1 125
4-Chlorotoluene ND ug/L 05/24/23 14:52 106-43-462.5 40.5 125
1,2-Dibromo-3-chloropropane ND ug/L 05/24/23 14:52 96-12-812542.5 125
Dibromochloromethane ND ug/L 05/24/23 14:52 124-48-162.5 44.9 125
1,2-Dibromoethane (EDB)ND ug/L 05/24/23 14:52 106-93-462.5 34.0 125
Dibromomethane ND ug/L 05/24/23 14:52 74-95-362.5 49.2 125
1,2-Dichlorobenzene ND ug/L 05/24/23 14:52 95-50-162.5 42.4 125
1,3-Dichlorobenzene ND ug/L 05/24/23 14:52 541-73-162.5 42.5 125
1,4-Dichlorobenzene ND ug/L 05/24/23 14:52 106-46-762.5 41.6 125
Dichlorodifluoromethane ND ug/L 05/24/23 14:52 75-71-8 IH,L162.5 43.2 125
1,1-Dichloroethane ND ug/L 05/24/23 14:52 75-34-362.5 45.9 125
1,2-Dichloroethane ND ug/L 05/24/23 14:52 107-06-262.5 40.2 125
1,1-Dichloroethene ND ug/L 05/24/23 14:52 75-35-462.5 43.5 125
cis-1,2-Dichloroethene ND ug/L 05/24/23 14:52 156-59-262.5 48.0 125
trans-1,2-Dichloroethene ND ug/L 05/24/23 14:52 156-60-562.5 49.5 125
1,2-Dichloropropane ND ug/L 05/24/23 14:52 78-87-562.5 44.4 125
1,3-Dichloropropane ND ug/L 05/24/23 14:52 142-28-962.5 35.5 125
2,2-Dichloropropane ND ug/L 05/24/23 14:52 594-20-762.5 48.5 125
1,1-Dichloropropene ND ug/L 05/24/23 14:52 563-58-662.5 53.4 125
cis-1,3-Dichloropropene ND ug/L 05/24/23 14:52 10061-01-562.5 45.6 125
trans-1,3-Dichloropropene ND ug/L 05/24/23 14:52 10061-02-662.5 45.4 125
Diisopropyl ether ND ug/L 05/24/23 14:52 108-20-362.5 38.5 125
Ethanol ND ug/L 05/24/23 14:52 64-17-5250009020125
Ethylbenzene 1120 ug/L 05/24/23 14:52 100-41-462.5 38.0 125
Hexachloro-1,3-butadiene ND ug/L 05/24/23 14:52 87-68-3250191125
Isopropylbenzene (Cumene)45.6J ug/L 05/24/23 14:52 98-82-862.5 41.6 125
Methylene Chloride ND ug/L 05/24/23 14:52 75-09-2250244125
Methyl-tert-butyl ether ND ug/L 05/24/23 14:52 1634-04-462.5 52.8 125
Naphthalene 224J ug/L 05/24/23 14:52 91-20-325080.6 125
n-Propylbenzene 127 ug/L 05/24/23 14:52 103-65-162.5 42.5 125
Styrene ND ug/L 05/24/23 14:52 100-42-562.5 36.5 125
1,1,1,2-Tetrachloroethane ND ug/L 05/24/23 14:52 630-20-662.5 38.9 125
1,1,2,2-Tetrachloroethane ND ug/L 05/24/23 14:52 79-34-562.5 28.1 125
Tetrachloroethene ND ug/L 05/24/23 14:52 127-18-462.5 36.5 125
Toluene 17000 ug/L 05/24/23 14:52 108-88-362.5 29.9 125
1,2,3-Trichlorobenzene ND ug/L 05/24/23 14:52 87-61-6250101125
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
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Page 15 of 39
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Sample:MW-8 Lab ID:92668455007 Collected:05/18/23 11:35 Received:05/19/23 16:20 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
1,2,4-Trichlorobenzene ND ug/L 05/24/23 14:52 120-82-125079.9 125
1,1,1-Trichloroethane ND ug/L 05/24/23 14:52 71-55-662.5 41.5 125
1,1,2-Trichloroethane ND ug/L 05/24/23 14:52 79-00-562.5 40.6 125
Trichloroethene ND ug/L 05/24/23 14:52 79-01-662.5 47.9 125
Trichlorofluoromethane ND ug/L 05/24/23 14:52 75-69-412537.2 125
1,2,3-Trichloropropane ND ug/L 05/24/23 14:52 96-18-462.5 32.6 125
1,2,4-Trimethylbenzene 1100 ug/L 05/24/23 14:52 95-63-662.5 61.9 125
1,3,5-Trimethylbenzene 303 ug/L 05/24/23 14:52 108-67-862.5 41.5 125
Vinyl chloride ND ug/L 05/24/23 14:52 75-01-412548.2 125
m&p-Xylene 3810 ug/L 05/24/23 14:52 179601-23-112588.6 125
o-Xylene 1440 ug/L 05/24/23 14:52 95-47-662.5 42.2 125
Surrogates
1,2-Dichloroethane-d4 (S)111 %05/24/23 14:52 17060-07-070-130 125
4-Bromofluorobenzene (S)104 %05/24/23 14:52 460-00-470-130 125
Toluene-d8 (S)99 %05/24/23 14:52 2037-26-570-130 125
Sample:MW-9 Lab ID:92668455008 Collected:05/18/23 13:00 Received:05/19/23 16:20 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
Benzene 1950 ug/L 05/24/23 15:10 71-43-212586.2 250
Bromobenzene ND ug/L 05/24/23 15:10 108-86-112572.5 250
Bromochloromethane ND ug/L 05/24/23 15:10 74-97-5125117250
Bromodichloromethane ND ug/L 05/24/23 15:10 75-27-412576.8 250
Bromoform ND ug/L 05/24/23 15:10 75-25-212585.2 250
Bromomethane ND ug/L 05/24/23 15:10 74-83-91250415250
n-Butylbenzene ND ug/L 05/24/23 15:10 104-51-8125122250
sec-Butylbenzene ND ug/L 05/24/23 15:10 135-98-8125100250
tert-Butylbenzene ND ug/L 05/24/23 15:10 98-06-612580.8 250
Carbon tetrachloride ND ug/L 05/24/23 15:10 56-23-512583.2 250
Chlorobenzene ND ug/L 05/24/23 15:10 108-90-712571.0 250
Chloroethane ND ug/L 05/24/23 15:10 75-00-3 L1250162250
Chloroform ND ug/L 05/24/23 15:10 67-66-3125108250
Chloromethane ND ug/L 05/24/23 15:10 74-87-3250135250
2-Chlorotoluene ND ug/L 05/24/23 15:10 95-49-812580.2 250
4-Chlorotoluene ND ug/L 05/24/23 15:10 106-43-412581.0 250
1,2-Dibromo-3-chloropropane ND ug/L 05/24/23 15:10 96-12-825085.0 250
Dibromochloromethane ND ug/L 05/24/23 15:10 124-48-112589.8 250
1,2-Dibromoethane (EDB)ND ug/L 05/24/23 15:10 106-93-412568.0 250
Dibromomethane ND ug/L 05/24/23 15:10 74-95-312598.5 250
1,2-Dichlorobenzene ND ug/L 05/24/23 15:10 95-50-112584.8 250
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
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Page 16 of 39
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Sample:MW-9 Lab ID:92668455008 Collected:05/18/23 13:00 Received:05/19/23 16:20 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
1,3-Dichlorobenzene ND ug/L 05/24/23 15:10 541-73-112585.0 250
1,4-Dichlorobenzene ND ug/L 05/24/23 15:10 106-46-712583.2 250
Dichlorodifluoromethane ND ug/L 05/24/23 15:10 75-71-8 IH,L112586.5 250
1,1-Dichloroethane ND ug/L 05/24/23 15:10 75-34-312591.8 250
1,2-Dichloroethane ND ug/L 05/24/23 15:10 107-06-212580.5 250
1,1-Dichloroethene ND ug/L 05/24/23 15:10 75-35-412587.0 250
cis-1,2-Dichloroethene ND ug/L 05/24/23 15:10 156-59-212596.0 250
trans-1,2-Dichloroethene ND ug/L 05/24/23 15:10 156-60-512599.0 250
1,2-Dichloropropane ND ug/L 05/24/23 15:10 78-87-512588.8 250
1,3-Dichloropropane ND ug/L 05/24/23 15:10 142-28-912571.0 250
2,2-Dichloropropane ND ug/L 05/24/23 15:10 594-20-712597.0 250
1,1-Dichloropropene ND ug/L 05/24/23 15:10 563-58-6125107250
cis-1,3-Dichloropropene ND ug/L 05/24/23 15:10 10061-01-512591.2 250
trans-1,3-Dichloropropene ND ug/L 05/24/23 15:10 10061-02-612590.8 250
Diisopropyl ether ND ug/L 05/24/23 15:10 108-20-312577.0 250
Ethanol ND ug/L 05/24/23 15:10 64-17-55000018000250
Ethylbenzene 3450 ug/L 05/24/23 15:10 100-41-412576.0 250
Hexachloro-1,3-butadiene ND ug/L 05/24/23 15:10 87-68-3500382250
Isopropylbenzene (Cumene)156 ug/L 05/24/23 15:10 98-82-812583.2 250
Methylene Chloride ND ug/L 05/24/23 15:10 75-09-2500488250
Methyl-tert-butyl ether 159 ug/L 05/24/23 15:10 1634-04-4125106250
Naphthalene 795 ug/L 05/24/23 15:10 91-20-3500161250
n-Propylbenzene 497 ug/L 05/24/23 15:10 103-65-112585.0 250
Styrene ND ug/L 05/24/23 15:10 100-42-512573.0 250
1,1,1,2-Tetrachloroethane ND ug/L 05/24/23 15:10 630-20-612577.8 250
1,1,2,2-Tetrachloroethane ND ug/L 05/24/23 15:10 79-34-512556.2 250
Tetrachloroethene ND ug/L 05/24/23 15:10 127-18-412573.0 250
Toluene 34200 ug/L 05/24/23 15:10 108-88-312559.8 250
1,2,3-Trichlorobenzene ND ug/L 05/24/23 15:10 87-61-6500202250
1,2,4-Trichlorobenzene ND ug/L 05/24/23 15:10 120-82-1500160250
1,1,1-Trichloroethane ND ug/L 05/24/23 15:10 71-55-612583.0 250
1,1,2-Trichloroethane ND ug/L 05/24/23 15:10 79-00-512581.2 250
Trichloroethene ND ug/L 05/24/23 15:10 79-01-612595.8 250
Trichlorofluoromethane ND ug/L 05/24/23 15:10 75-69-425074.5 250
1,2,3-Trichloropropane ND ug/L 05/24/23 15:10 96-18-412565.2 250
1,2,4-Trimethylbenzene 4210 ug/L 05/24/23 15:10 95-63-6125124250
1,3,5-Trimethylbenzene 1040 ug/L 05/24/23 15:10 108-67-812583.0 250
Vinyl chloride ND ug/L 05/24/23 15:10 75-01-425096.5 250
m&p-Xylene 13100 ug/L 05/24/23 15:10 179601-23-1250177250
o-Xylene 5720 ug/L 05/24/23 15:10 95-47-612584.5 250
Surrogates
1,2-Dichloroethane-d4 (S)118 %05/24/23 15:10 17060-07-070-130 250
4-Bromofluorobenzene (S)104 %05/24/23 15:10 460-00-470-130 250
Toluene-d8 (S)98 %05/24/23 15:10 2037-26-570-130 250
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 17 of 39
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Sample:FIELD BLANK Lab ID:92668455009 Collected:05/19/23 15:03 Received:05/19/23 16:20 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
Benzene ND ug/L 05/22/23 07:05 71-43-20.50 0.34 1
Bromobenzene ND ug/L 05/22/23 07:05 108-86-10.50 0.29 1
Bromochloromethane ND ug/L 05/22/23 07:05 74-97-50.50 0.47 1
Bromodichloromethane ND ug/L 05/22/23 07:05 75-27-40.50 0.31 1
Bromoform ND ug/L 05/22/23 07:05 75-25-20.50 0.34 1
Bromomethane ND ug/L 05/22/23 07:05 74-83-95.0 1.7 1
n-Butylbenzene ND ug/L 05/22/23 07:05 104-51-80.50 0.49 1
sec-Butylbenzene ND ug/L 05/22/23 07:05 135-98-80.50 0.40 1
tert-Butylbenzene ND ug/L 05/22/23 07:05 98-06-60.50 0.32 1
Carbon tetrachloride ND ug/L 05/22/23 07:05 56-23-50.50 0.33 1
Chlorobenzene ND ug/L 05/22/23 07:05 108-90-70.50 0.28 1
Chloroethane ND ug/L 05/22/23 07:05 75-00-31.0 0.65 1
Chloroform ND ug/L 05/22/23 07:05 67-66-30.50 0.43 1
Chloromethane ND ug/L 05/22/23 07:05 74-87-31.0 0.54 1
2-Chlorotoluene ND ug/L 05/22/23 07:05 95-49-80.50 0.32 1
4-Chlorotoluene ND ug/L 05/22/23 07:05 106-43-40.50 0.32 1
1,2-Dibromo-3-chloropropane ND ug/L 05/22/23 07:05 96-12-81.0 0.34 1
Dibromochloromethane ND ug/L 05/22/23 07:05 124-48-10.50 0.36 1
1,2-Dibromoethane (EDB)ND ug/L 05/22/23 07:05 106-93-40.50 0.27 1
Dibromomethane ND ug/L 05/22/23 07:05 74-95-30.50 0.39 1
1,2-Dichlorobenzene ND ug/L 05/22/23 07:05 95-50-10.50 0.34 1
1,3-Dichlorobenzene ND ug/L 05/22/23 07:05 541-73-10.50 0.34 1
1,4-Dichlorobenzene ND ug/L 05/22/23 07:05 106-46-70.50 0.33 1
Dichlorodifluoromethane ND ug/L 05/22/23 07:05 75-71-80.50 0.35 1
1,1-Dichloroethane ND ug/L 05/22/23 07:05 75-34-30.50 0.37 1
1,2-Dichloroethane ND ug/L 05/22/23 07:05 107-06-20.50 0.32 1
1,1-Dichloroethene ND ug/L 05/22/23 07:05 75-35-40.50 0.35 1
cis-1,2-Dichloroethene ND ug/L 05/22/23 07:05 156-59-20.50 0.38 1
trans-1,2-Dichloroethene ND ug/L 05/22/23 07:05 156-60-50.50 0.40 1
1,2-Dichloropropane ND ug/L 05/22/23 07:05 78-87-50.50 0.36 1
1,3-Dichloropropane ND ug/L 05/22/23 07:05 142-28-90.50 0.28 1
2,2-Dichloropropane ND ug/L 05/22/23 07:05 594-20-70.50 0.39 1
1,1-Dichloropropene ND ug/L 05/22/23 07:05 563-58-60.50 0.43 1
cis-1,3-Dichloropropene ND ug/L 05/22/23 07:05 10061-01-50.50 0.36 1
trans-1,3-Dichloropropene ND ug/L 05/22/23 07:05 10061-02-60.50 0.36 1
Diisopropyl ether ND ug/L 05/22/23 07:05 108-20-30.50 0.31 1
Ethanol ND ug/L 05/22/23 07:05 64-17-520072.2 1
Ethylbenzene ND ug/L 05/22/23 07:05 100-41-40.50 0.30 1
Hexachloro-1,3-butadiene ND ug/L 05/22/23 07:05 87-68-32.0 1.5 1
Isopropylbenzene (Cumene)ND ug/L 05/22/23 07:05 98-82-80.50 0.33 1
Methylene Chloride ND ug/L 05/22/23 07:05 75-09-22.0 2.0 1
Methyl-tert-butyl ether ND ug/L 05/22/23 07:05 1634-04-40.50 0.42 1
Naphthalene ND ug/L 05/22/23 07:05 91-20-32.0 0.64 1
n-Propylbenzene ND ug/L 05/22/23 07:05 103-65-10.50 0.34 1
Styrene ND ug/L 05/22/23 07:05 100-42-50.50 0.29 1
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 18 of 39
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Sample:FIELD BLANK Lab ID:92668455009 Collected:05/19/23 15:03 Received:05/19/23 16:20 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: SM 6200B
Pace Analytical Services - Charlotte
6200B MSV
1,1,1,2-Tetrachloroethane ND ug/L 05/22/23 07:05 630-20-60.50 0.31 1
1,1,2,2-Tetrachloroethane ND ug/L 05/22/23 07:05 79-34-50.50 0.22 1
Tetrachloroethene ND ug/L 05/22/23 07:05 127-18-40.50 0.29 1
Toluene ND ug/L 05/22/23 07:05 108-88-30.50 0.24 1
1,2,3-Trichlorobenzene ND ug/L 05/22/23 07:05 87-61-62.0 0.81 1
1,2,4-Trichlorobenzene ND ug/L 05/22/23 07:05 120-82-12.0 0.64 1
1,1,1-Trichloroethane ND ug/L 05/22/23 07:05 71-55-60.50 0.33 1
1,1,2-Trichloroethane ND ug/L 05/22/23 07:05 79-00-50.50 0.32 1
Trichloroethene ND ug/L 05/22/23 07:05 79-01-60.50 0.38 1
Trichlorofluoromethane ND ug/L 05/22/23 07:05 75-69-41.0 0.30 1
1,2,3-Trichloropropane ND ug/L 05/22/23 07:05 96-18-40.50 0.26 1
1,2,4-Trimethylbenzene ND ug/L 05/22/23 07:05 95-63-60.50 0.50 1
1,3,5-Trimethylbenzene ND ug/L 05/22/23 07:05 108-67-80.50 0.33 1
Vinyl chloride ND ug/L 05/22/23 07:05 75-01-41.0 0.39 1
m&p-Xylene ND ug/L 05/22/23 07:05 179601-23-11.0 0.71 1
o-Xylene ND ug/L 05/22/23 07:05 95-47-60.50 0.34 1
Surrogates
1,2-Dichloroethane-d4 (S)102 %05/22/23 07:05 17060-07-0 HS70-130 1
4-Bromofluorobenzene (S)99 %05/22/23 07:05 460-00-470-130 1
Toluene-d8 (S)106 %05/22/23 07:05 2037-26-570-130 1
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 19 of 39
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
QC Batch:
QC Batch Method:
Analysis Method:
Analysis Description:
775967
SM 6200B
SM 6200B
6200B MSV
Laboratory:Pace Analytical Services - Charlotte
Associated Lab Samples:92668455009
Parameter Units
Blank
Result
Reporting
Limit Qualifiers
METHOD BLANK:4026163
Associated Lab Samples:92668455009
Matrix:Water
AnalyzedMDL
1,1,1,2-Tetrachloroethane ug/L ND 0.50 05/22/23 06:290.31
1,1,1-Trichloroethane ug/L ND 0.50 05/22/23 06:290.33
1,1,2,2-Tetrachloroethane ug/L ND 0.50 05/22/23 06:290.22
1,1,2-Trichloroethane ug/L ND 0.50 05/22/23 06:290.32
1,1-Dichloroethane ug/L ND 0.50 05/22/23 06:290.37
1,1-Dichloroethene ug/L ND 0.50 05/22/23 06:290.35
1,1-Dichloropropene ug/L ND 0.50 05/22/23 06:290.43
1,2,3-Trichlorobenzene ug/L ND 2.0 05/22/23 06:290.81
1,2,3-Trichloropropane ug/L ND 0.50 05/22/23 06:290.26
1,2,4-Trichlorobenzene ug/L ND 2.0 05/22/23 06:290.64
1,2,4-Trimethylbenzene ug/L ND 0.50 05/22/23 06:290.50
1,2-Dibromo-3-chloropropane ug/L ND 1.0 05/22/23 06:290.34
1,2-Dibromoethane (EDB)ug/L ND 0.50 05/22/23 06:290.27
1,2-Dichlorobenzene ug/L ND 0.50 05/22/23 06:290.34
1,2-Dichloroethane ug/L ND 0.50 05/22/23 06:290.32
1,2-Dichloropropane ug/L ND 0.50 05/22/23 06:290.36
1,3,5-Trimethylbenzene ug/L ND 0.50 05/22/23 06:290.33
1,3-Dichlorobenzene ug/L ND 0.50 05/22/23 06:290.34
1,3-Dichloropropane ug/L ND 0.50 05/22/23 06:290.28
1,4-Dichlorobenzene ug/L ND 0.50 05/22/23 06:290.33
2,2-Dichloropropane ug/L ND 0.50 05/22/23 06:290.39
2-Chlorotoluene ug/L ND 0.50 05/22/23 06:290.32
4-Chlorotoluene ug/L ND 0.50 05/22/23 06:290.32
Benzene ug/L ND 0.50 05/22/23 06:290.34
Bromobenzene ug/L ND 0.50 05/22/23 06:290.29
Bromochloromethane ug/L ND 0.50 05/22/23 06:290.47
Bromodichloromethane ug/L ND 0.50 05/22/23 06:290.31
Bromoform ug/L ND 0.50 05/22/23 06:290.34
Bromomethane ug/L ND 5.0 05/22/23 06:291.7
Carbon tetrachloride ug/L ND 0.50 05/22/23 06:290.33
Chlorobenzene ug/L ND 0.50 05/22/23 06:290.28
Chloroethane ug/L ND 1.0 05/22/23 06:290.65
Chloroform ug/L ND 0.50 05/22/23 06:290.43
Chloromethane ug/L ND 1.0 05/22/23 06:290.54
cis-1,2-Dichloroethene ug/L ND 0.50 05/22/23 06:290.38
cis-1,3-Dichloropropene ug/L ND 0.50 05/22/23 06:290.36
Dibromochloromethane ug/L ND 0.50 05/22/23 06:290.36
Dibromomethane ug/L ND 0.50 05/22/23 06:290.39
Dichlorodifluoromethane ug/L ND 0.50 05/22/23 06:290.35
Diisopropyl ether ug/L ND 0.50 05/22/23 06:290.31
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 20 of 39
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
Parameter Units
Blank
Result
Reporting
Limit Qualifiers
METHOD BLANK:4026163
Associated Lab Samples:92668455009
Matrix:Water
AnalyzedMDL
Ethanol ug/L ND 200 05/22/23 06:2972.2
Ethylbenzene ug/L ND 0.50 05/22/23 06:290.30
Hexachloro-1,3-butadiene ug/L ND 2.0 05/22/23 06:291.5
Isopropylbenzene (Cumene)ug/L ND 0.50 05/22/23 06:290.33
m&p-Xylene ug/L ND 1.0 05/22/23 06:290.71
Methyl-tert-butyl ether ug/L ND 0.50 05/22/23 06:290.42
Methylene Chloride ug/L ND 2.0 05/22/23 06:292.0
n-Butylbenzene ug/L ND 0.50 05/22/23 06:290.49
n-Propylbenzene ug/L ND 0.50 05/22/23 06:290.34
Naphthalene ug/L ND 2.0 05/22/23 06:290.64
o-Xylene ug/L ND 0.50 05/22/23 06:290.34
sec-Butylbenzene ug/L ND 0.50 05/22/23 06:290.40
Styrene ug/L ND 0.50 05/22/23 06:290.29
tert-Butylbenzene ug/L ND 0.50 05/22/23 06:290.32
Tetrachloroethene ug/L ND 0.50 05/22/23 06:290.29
Toluene ug/L ND 0.50 05/22/23 06:290.24
trans-1,2-Dichloroethene ug/L ND 0.50 05/22/23 06:290.40
trans-1,3-Dichloropropene ug/L ND 0.50 05/22/23 06:290.36
Trichloroethene ug/L ND 0.50 05/22/23 06:290.38
Trichlorofluoromethane ug/L ND 1.0 05/22/23 06:290.30
Vinyl chloride ug/L ND 1.0 05/22/23 06:290.39
1,2-Dichloroethane-d4 (S)%98 70-130 05/22/23 06:29
4-Bromofluorobenzene (S)%99 70-130 05/22/23 06:29
Toluene-d8 (S)%102 70-130 05/22/23 06:29
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
4026164LABORATORY CONTROL SAMPLE:
LCSSpike
1,1,1,2-Tetrachloroethane ug/L 20.820 104 60-140
1,1,1-Trichloroethane ug/L 22.220 111 60-140
1,1,2,2-Tetrachloroethane ug/L 21.320 107 60-140
1,1,2-Trichloroethane ug/L 21.020 105 60-140
1,1-Dichloroethane ug/L 21.620 108 60-140
1,1-Dichloroethene ug/L 23.220 116 60-140
1,1-Dichloropropene ug/L 20.920 104 60-140
1,2,3-Trichlorobenzene ug/L 22.520 113 60-140
1,2,3-Trichloropropane ug/L 19.520 98 60-140
1,2,4-Trichlorobenzene ug/L 20.520 102 60-140
1,2,4-Trimethylbenzene ug/L 20.720 104 60-140
1,2-Dibromo-3-chloropropane ug/L 21.520 108 60-140
1,2-Dibromoethane (EDB)ug/L 21.320 107 60-140
1,2-Dichlorobenzene ug/L 21.120 105 60-140
1,2-Dichloroethane ug/L 21.920 109 60-140
1,2-Dichloropropane ug/L 22.120 111 60-140
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 21 of 39
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
4026164LABORATORY CONTROL SAMPLE:
LCSSpike
1,3,5-Trimethylbenzene ug/L 20.620 103 60-140
1,3-Dichlorobenzene ug/L 20.720 104 60-140
1,3-Dichloropropane ug/L 21.820 109 60-140
1,4-Dichlorobenzene ug/L 19.520 97 60-140
2,2-Dichloropropane ug/L 21.020 105 60-140
2-Chlorotoluene ug/L 20.720 104 60-140
4-Chlorotoluene ug/L 20.920 105 60-140
Benzene ug/L 21.220 106 60-140
Bromobenzene ug/L 20.420 102 60-140
Bromochloromethane ug/L 21.520 107 60-140
Bromodichloromethane ug/L 21.220 106 60-140
Bromoform ug/L 20.520 103 60-140
Bromomethane ug/L 16.120 81 60-140
Carbon tetrachloride ug/L 22.020 110 60-140
Chlorobenzene ug/L 22.120 111 60-140
Chloroethane ug/L 19.820 99 60-140
Chloroform ug/L 21.520 108 60-140
Chloromethane ug/L 18.220 91 60-140
cis-1,2-Dichloroethene ug/L 21.820 109 60-140
cis-1,3-Dichloropropene ug/L 21.320 107 60-140
Dibromochloromethane ug/L 21.120 106 60-140
Dibromomethane ug/L 21.120 105 60-140
Dichlorodifluoromethane ug/L 18.220 91 60-140
Diisopropyl ether ug/L 21.020 105 60-140
Ethanol ug/L 846800 106 60-140
Ethylbenzene ug/L 21.220 106 60-140
Hexachloro-1,3-butadiene ug/L 19.820 99 60-140
Isopropylbenzene (Cumene)ug/L 21.620 108 60-140
m&p-Xylene ug/L 41.840 104 60-140
Methyl-tert-butyl ether ug/L 20.720 104 60-140
Methylene Chloride ug/L 22.420 112 60-140
n-Butylbenzene ug/L 21.020 105 60-140
n-Propylbenzene ug/L 20.420 102 60-140
Naphthalene ug/L 22.920 114 60-140
o-Xylene ug/L 20.920 105 60-140
sec-Butylbenzene ug/L 20.920 104 60-140
Styrene ug/L 21.120 106 60-140
tert-Butylbenzene ug/L 17.120 85 60-140
Tetrachloroethene ug/L 20.120 101 60-140
Toluene ug/L 20.620 103 60-140
trans-1,2-Dichloroethene ug/L 21.620 108 60-140
trans-1,3-Dichloropropene ug/L 20.020 100 60-140
Trichloroethene ug/L 21.320 106 60-140
Trichlorofluoromethane ug/L 19.520 98 60-140
Vinyl chloride ug/L 16.020 80 60-140
1,2-Dichloroethane-d4 (S)%108 70-130
4-Bromofluorobenzene (S)%102 70-130
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 22 of 39
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
4026164LABORATORY CONTROL SAMPLE:
LCSSpike
Toluene-d8 (S)%97 70-130
Parameter Units
MS
Result
% Rec
Limits Qual% RecConc.
4026165MATRIX SPIKE & MATRIX SPIKE DUPLICATE:
MSSpike
Result
92668405004
4026166
MSD
Result
MSD
% Rec RPD RPD
Max
MSDMS
Spike
Conc.
1,1,1,2-Tetrachloroethane ug/L 20 93 60-140113 20 3020ND18.6 22.7
1,1,1-Trichloroethane ug/L 20 107 60-140129 19 3020ND21.4 25.8
1,1,2,2-Tetrachloroethane ug/L 20 97 60-140116 18 3020ND19.4 23.2
1,1,2-Trichloroethane ug/L 20 93 60-140118 23 3020ND18.7 23.5
1,1-Dichloroethane ug/L 20 101 60-140126 21 3020ND20.3 25.2
1,1-Dichloroethene ug/L M12011760-140144 21 3020ND23.4 28.8
1,1-Dichloropropene ug/L 20 101 60-140121 18 3020ND20.3 24.3
1,2,3-Trichlorobenzene ug/L 20 98 60-140122 21 3020ND19.7 24.3
1,2,3-Trichloropropane ug/L 20 94 60-140104 10 3020ND18.9 20.9
1,2,4-Trichlorobenzene ug/L 20 97 60-140119 20 3020ND19.5 23.8
1,2,4-Trimethylbenzene ug/L 20 98 60-140117 17 3020ND19.7 23.3
1,2-Dibromo-3-
chloropropane ug/L 20 93 60-140116 22 3020ND18.6 23.3
1,2-Dibromoethane (EDB)ug/L 20 95 60-140113 17 3020ND19.0 22.5
1,2-Dichlorobenzene ug/L 20 96 60-140116 19 3020ND19.2 23.2
1,2-Dichloroethane ug/L 20 96 60-140124 25 3020ND19.3 24.8
1,2-Dichloropropane ug/L 20 100 60-140120 18 3020ND20.0 24.1
1,3,5-Trimethylbenzene ug/L 20 97 60-140118 20 3020ND19.4 23.7
1,3-Dichlorobenzene ug/L 20 98 60-140121 21 3020ND19.5 24.1
1,3-Dichloropropane ug/L 20 96 60-140116 19 3020ND19.2 23.2
1,4-Dichlorobenzene ug/L 20 94 60-140111 17 3020ND18.7 22.3
2,2-Dichloropropane ug/L 20 107 60-140133 22 3020ND21.3 26.6
2-Chlorotoluene ug/L 20 97 60-140119 20 3020ND19.5 23.7
4-Chlorotoluene ug/L 20 98 60-140120 20 3020ND19.7 24.0
Benzene ug/L 20 95 60-140117 20 3020ND19.0 23.3
Bromobenzene ug/L 20 93 60-140114 20 3020ND18.7 22.7
Bromochloromethane ug/L 20 94 60-140118 22 3020ND18.9 23.7
Bromodichloromethane ug/L 20 96 60-140116 19 3020ND19.2 23.2
Bromoform ug/L 20 84 60-140103 20 3020ND16.8 20.5
Bromomethane ug/L 20 70 60-14086 20 3020ND14.3 17.5
Carbon tetrachloride ug/L 20 111 60-140130 16 3020ND22.1 26.0
Chlorobenzene ug/L 20 99 60-140116 16 3020ND19.7 23.2
Chloroethane ug/L 20 104 60-140130 22 3020ND20.8 25.9
Chloroform ug/L 20 101 60-140122 19 3020ND20.2 24.5
Chloromethane ug/L 20 105 60-140133 23 3020ND21.1 26.5
cis-1,2-Dichloroethene ug/L 20 100 60-140125 22 3020ND20.0 24.9
cis-1,3-Dichloropropene ug/L 20 95 60-140117 20 3020ND19.0 23.3
Dibromochloromethane ug/L 20 89 60-140112 23 3020ND17.8 22.4
Dibromomethane ug/L 20 93 60-140114 20 3020ND18.6 22.7
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 23 of 39
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
Parameter Units
MS
Result
% Rec
Limits Qual% RecConc.
4026165MATRIX SPIKE & MATRIX SPIKE DUPLICATE:
MSSpike
Result
92668405004
4026166
MSD
Result
MSD
% Rec RPD RPD
Max
MSDMS
Spike
Conc.
Dichlorodifluoromethane ug/L M12013260-140160 19 3020ND26.4 31.9
Diisopropyl ether ug/L 20 94 60-140120 24 3020ND18.9 24.0
Ethanol ug/L 800 88 60-140116 28 30800ND702931
Ethylbenzene ug/L 20 99 60-140119 18 3020ND19.9 23.7
Hexachloro-1,3-butadiene ug/L 20 101 60-140126 22 3020ND20.2 25.2
Isopropylbenzene
(Cumene)ug/L 20 103 60-140122 17 3020ND20.6 24.5
m&p-Xylene ug/L 40 98 60-140115 16 3040ND39.2 45.9
Methyl-tert-butyl ether ug/L 20 88 60-140114 25 3020ND17.6 22.8
Methylene Chloride ug/L 20 98 60-140123 23 3020ND19.5 24.6
n-Butylbenzene ug/L 20 105 60-140126 18 3020ND21.1 25.2
n-Propylbenzene ug/L 20 100 60-140121 19 3020ND19.9 24.2
Naphthalene ug/L 20 99 60-140125 23 3020ND19.9 25.0
o-Xylene ug/L 20 97 60-140110 12 3020ND19.4 21.9
sec-Butylbenzene ug/L 20 102 60-140122 18 3020ND20.3 24.4
Styrene ug/L 20 95 60-140108 12 3020ND19.0 21.5
tert-Butylbenzene ug/L 20 82 60-14098 18 3020ND16.5 19.7
Tetrachloroethene ug/L 20 99 60-140122 21 3020ND19.8 24.3
Toluene ug/L 20 96 60-140114 17 3020ND19.2 22.7
trans-1,2-Dichloroethene ug/L 20 104 60-140129 22 3020ND20.8 25.8
trans-1,3-Dichloropropene ug/L 20 90 60-140113 23 3020ND18.1 22.7
Trichloroethene ug/L 20 102 60-140124 19 3020ND20.4 24.7
Trichlorofluoromethane ug/L 20 103 60-140124 19 3020ND20.5 24.9
Vinyl chloride ug/L 20 89 60-140114 24 3020ND17.9 22.7
1,2-Dichloroethane-d4 (S)%104 70-130106
4-Bromofluorobenzene (S)%103 70-13099
Toluene-d8 (S)%99 70-13099
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 24 of 39
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
QC Batch:
QC Batch Method:
Analysis Method:
Analysis Description:
776316
SM 6200B
SM 6200B
6200B MSV
Laboratory:Pace Analytical Services - Charlotte
Associated Lab Samples:92668455001, 92668455003, 92668455004, 92668455006
Parameter Units
Blank
Result
Reporting
Limit Qualifiers
METHOD BLANK:4027679
Associated Lab Samples:92668455001, 92668455003, 92668455004, 92668455006
Matrix:Water
AnalyzedMDL
1,1,1,2-Tetrachloroethane ug/L ND 0.50 05/23/23 11:380.31
1,1,1-Trichloroethane ug/L ND 0.50 05/23/23 11:380.33
1,1,2,2-Tetrachloroethane ug/L ND 0.50 05/23/23 11:380.22
1,1,2-Trichloroethane ug/L ND 0.50 05/23/23 11:380.32
1,1-Dichloroethane ug/L ND 0.50 05/23/23 11:380.37
1,1-Dichloroethene ug/L ND 0.50 05/23/23 11:380.35
1,1-Dichloropropene ug/L ND 0.50 05/23/23 11:380.43
1,2,3-Trichlorobenzene ug/L ND 2.0 05/23/23 11:380.81
1,2,3-Trichloropropane ug/L ND 0.50 05/23/23 11:380.26
1,2,4-Trichlorobenzene ug/L ND 2.0 05/23/23 11:380.64
1,2,4-Trimethylbenzene ug/L ND 0.50 05/23/23 11:380.50
1,2-Dibromo-3-chloropropane ug/L ND 1.0 05/23/23 11:380.34
1,2-Dibromoethane (EDB)ug/L ND 0.50 05/23/23 11:380.27
1,2-Dichlorobenzene ug/L ND 0.50 05/23/23 11:380.34
1,2-Dichloroethane ug/L ND 0.50 05/23/23 11:380.32
1,2-Dichloropropane ug/L ND 0.50 05/23/23 11:380.36
1,3,5-Trimethylbenzene ug/L ND 0.50 05/23/23 11:380.33
1,3-Dichlorobenzene ug/L ND 0.50 05/23/23 11:380.34
1,3-Dichloropropane ug/L ND 0.50 05/23/23 11:380.28
1,4-Dichlorobenzene ug/L ND 0.50 05/23/23 11:380.33
2,2-Dichloropropane ug/L ND 0.50 05/23/23 11:380.39
2-Chlorotoluene ug/L ND 0.50 05/23/23 11:380.32
4-Chlorotoluene ug/L ND 0.50 05/23/23 11:380.32
Benzene ug/L ND 0.50 05/23/23 11:380.34
Bromobenzene ug/L ND 0.50 05/23/23 11:380.29
Bromochloromethane ug/L ND 0.50 05/23/23 11:380.47
Bromodichloromethane ug/L ND 0.50 05/23/23 11:380.31
Bromoform ug/L ND 0.50 05/23/23 11:380.34
Bromomethane ug/L ND 5.0 05/23/23 11:381.7
Carbon tetrachloride ug/L ND 0.50 05/23/23 11:380.33
Chlorobenzene ug/L ND 0.50 05/23/23 11:380.28
Chloroethane ug/L ND 1.0 05/23/23 11:380.65
Chloroform ug/L ND 0.50 05/23/23 11:380.43
Chloromethane ug/L ND 1.0 05/23/23 11:380.54
cis-1,2-Dichloroethene ug/L ND 0.50 05/23/23 11:380.38
cis-1,3-Dichloropropene ug/L ND 0.50 05/23/23 11:380.36
Dibromochloromethane ug/L ND 0.50 05/23/23 11:380.36
Dibromomethane ug/L ND 0.50 05/23/23 11:380.39
Dichlorodifluoromethane ug/L ND 0.50 05/23/23 11:380.35
Diisopropyl ether ug/L ND 0.50 05/23/23 11:380.31
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 25 of 39
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
Parameter Units
Blank
Result
Reporting
Limit Qualifiers
METHOD BLANK:4027679
Associated Lab Samples:92668455001, 92668455003, 92668455004, 92668455006
Matrix:Water
AnalyzedMDL
Ethanol ug/L ND 200 05/23/23 11:3872.2
Ethylbenzene ug/L ND 0.50 05/23/23 11:380.30
Hexachloro-1,3-butadiene ug/L ND 2.0 05/23/23 11:381.5
Isopropylbenzene (Cumene)ug/L ND 0.50 05/23/23 11:380.33
m&p-Xylene ug/L ND 1.0 05/23/23 11:380.71
Methyl-tert-butyl ether ug/L ND 0.50 05/23/23 11:380.42
Methylene Chloride ug/L ND 2.0 05/23/23 11:382.0
n-Butylbenzene ug/L ND 0.50 05/23/23 11:380.49
n-Propylbenzene ug/L ND 0.50 05/23/23 11:380.34
Naphthalene ug/L ND 2.0 05/23/23 11:380.64
o-Xylene ug/L ND 0.50 05/23/23 11:380.34
sec-Butylbenzene ug/L ND 0.50 05/23/23 11:380.40
Styrene ug/L ND 0.50 05/23/23 11:380.29
tert-Butylbenzene ug/L ND 0.50 05/23/23 11:380.32
Tetrachloroethene ug/L ND 0.50 05/23/23 11:380.29
Toluene ug/L ND 0.50 05/23/23 11:380.24
trans-1,2-Dichloroethene ug/L ND 0.50 05/23/23 11:380.40
trans-1,3-Dichloropropene ug/L ND 0.50 05/23/23 11:380.36
Trichloroethene ug/L ND 0.50 05/23/23 11:380.38
Trichlorofluoromethane ug/L ND 1.0 05/23/23 11:380.30
Vinyl chloride ug/L ND 1.0 05/23/23 11:380.39
1,2-Dichloroethane-d4 (S)%106 70-130 05/23/23 11:38
4-Bromofluorobenzene (S)%98 70-130 05/23/23 11:38
Toluene-d8 (S)%106 70-130 05/23/23 11:38
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
4027680LABORATORY CONTROL SAMPLE:
LCSSpike
1,1,1,2-Tetrachloroethane ug/L 18.720 93 60-140
1,1,1-Trichloroethane ug/L 19.520 97 60-140
1,1,2,2-Tetrachloroethane ug/L 20.220 101 60-140
1,1,2-Trichloroethane ug/L 19.420 97 60-140
1,1-Dichloroethane ug/L 20.620 103 60-140
1,1-Dichloroethene ug/L 22.220 111 60-140
1,1-Dichloropropene ug/L 19.320 96 60-140
1,2,3-Trichlorobenzene ug/L 20.620 103 60-140
1,2,3-Trichloropropane ug/L 19.720 98 60-140
1,2,4-Trichlorobenzene ug/L 19.220 96 60-140
1,2,4-Trimethylbenzene ug/L 19.320 97 60-140
1,2-Dibromo-3-chloropropane ug/L 19.620 98 60-140
1,2-Dibromoethane (EDB)ug/L 19.120 96 60-140
1,2-Dichlorobenzene ug/L 19.220 96 60-140
1,2-Dichloroethane ug/L 20.320 101 60-140
1,2-Dichloropropane ug/L 19.820 99 60-140
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 26 of 39
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
4027680LABORATORY CONTROL SAMPLE:
LCSSpike
1,3,5-Trimethylbenzene ug/L 19.320 97 60-140
1,3-Dichlorobenzene ug/L 19.320 97 60-140
1,3-Dichloropropane ug/L 19.620 98 60-140
1,4-Dichlorobenzene ug/L 18.920 94 60-140
2,2-Dichloropropane ug/L 20.020 100 60-140
2-Chlorotoluene ug/L 18.720 93 60-140
4-Chlorotoluene ug/L 19.820 99 60-140
Benzene ug/L 19.120 95 60-140
Bromobenzene ug/L 17.920 90 60-140
Bromochloromethane ug/L 19.920 100 60-140
Bromodichloromethane ug/L 20.020 100 60-140
Bromoform ug/L 16.920 85 60-140
Bromomethane ug/L 12.620 63 60-140
Carbon tetrachloride ug/L 19.920 100 60-140
Chlorobenzene ug/L 19.420 97 60-140
Chloroethane ug/L 21.120 105 60-140
Chloroform ug/L 19.720 99 60-140
Chloromethane ug/L 20.220 101 60-140
cis-1,2-Dichloroethene ug/L 20.020 100 60-140
cis-1,3-Dichloropropene ug/L 20.220 101 60-140
Dibromochloromethane ug/L 18.720 93 60-140
Dibromomethane ug/L 18.920 94 60-140
Dichlorodifluoromethane ug/L 21.220 106 60-140
Diisopropyl ether ug/L 19.020 95 60-140
Ethanol ug/L 847800 106 60-140
Ethylbenzene ug/L 19.120 96 60-140
Hexachloro-1,3-butadiene ug/L 19.420 97 60-140
Isopropylbenzene (Cumene)ug/L 19.620 98 60-140
m&p-Xylene ug/L 37.440 93 60-140
Methyl-tert-butyl ether ug/L 18.820 94 60-140
Methylene Chloride ug/L 20.920 104 60-140
n-Butylbenzene ug/L 20.120 100 60-140
n-Propylbenzene ug/L 18.820 94 60-140
Naphthalene ug/L 21.020 105 60-140
o-Xylene ug/L 18.720 93 60-140
sec-Butylbenzene ug/L 19.620 98 60-140
Styrene ug/L 18.520 93 60-140
tert-Butylbenzene ug/L 17.920 89 60-140
Tetrachloroethene ug/L 19.220 96 60-140
Toluene ug/L 18.520 92 60-140
trans-1,2-Dichloroethene ug/L 20.720 104 60-140
trans-1,3-Dichloropropene ug/L 18.920 95 60-140
Trichloroethene ug/L 20.120 101 60-140
Trichlorofluoromethane ug/L 18.120 91 60-140
Vinyl chloride ug/L 16.320 82 60-140
1,2-Dichloroethane-d4 (S)%109 70-130
4-Bromofluorobenzene (S)%102 70-130
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 27 of 39
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
4027680LABORATORY CONTROL SAMPLE:
LCSSpike
Toluene-d8 (S)%102 70-130
Parameter Units
MS
Result
% Rec
Limits Qual% RecConc.
4027681MATRIX SPIKE & MATRIX SPIKE DUPLICATE:
MSSpike
Result
92667797014
4027682
MSD
Result
MSD
% Rec RPD RPD
Max
MSDMS
Spike
Conc.
1,1,1,2-Tetrachloroethane ug/L 20 111 60-140120 8 3020ND22.2 24.0
1,1,1-Trichloroethane ug/L 20 119 60-140128 7 3020ND23.7 25.6
1,1,2,2-Tetrachloroethane ug/L 20 118 60-140126 7 3020ND23.5 25.1
1,1,2-Trichloroethane ug/L 20 103 60-140117 13 3020ND20.7 23.4
1,1-Dichloroethane ug/L 20 114 60-140123 8 3020ND22.7 24.5
1,1-Dichloroethene ug/L 20 131 60-140136 4 3020ND26.2 27.1
1,1-Dichloropropene ug/L 20 113 60-140121 7 3020ND22.7 24.2
1,2,3-Trichlorobenzene ug/L 20 118 60-140133 12 3020ND23.5 26.6
1,2,3-Trichloropropane ug/L 20 111 60-140120 7 3020ND22.3 23.9
1,2,4-Trichlorobenzene ug/L 20 112 60-140124 10 3020ND22.5 24.8
1,2,4-Trimethylbenzene ug/L 20 115 60-140125 8 3020ND23.0 25.0
1,2-Dibromo-3-
chloropropane ug/L 20 117 60-140128 9 3020ND23.4 25.5
1,2-Dibromoethane (EDB)ug/L 20 112 60-140121 8 3020ND22.4 24.2
1,2-Dichlorobenzene ug/L 20 112 60-140123 9 3020ND22.4 24.5
1,2-Dichloroethane ug/L 20 111 60-140118 6 3020ND22.2 23.7
1,2-Dichloropropane ug/L 20 112 60-140119 6 3020ND22.5 23.8
1,3,5-Trimethylbenzene ug/L 20 115 60-140126 10 3020ND22.9 25.3
1,3-Dichlorobenzene ug/L 20 114 60-140124 8 3020ND22.9 24.7
1,3-Dichloropropane ug/L 20 115 60-140123 6 3020ND23.0 24.5
1,4-Dichlorobenzene ug/L 20 110 60-140118 7 3020ND22.0 23.6
2,2-Dichloropropane ug/L 20 115 60-140121 5 3020ND23.0 24.2
2-Chlorotoluene ug/L 20 112 60-140119 6 3020ND22.3 23.8
4-Chlorotoluene ug/L 20 115 60-140125 8 3020ND22.9 24.9
Benzene ug/L 20 109 60-140121 10 30200.97 22.8 25.2
Bromobenzene ug/L 20 108 60-140118 9 3020ND21.7 23.6
Bromochloromethane ug/L 20 111 60-140121 8 3020ND22.2 24.1
Bromodichloromethane ug/L 20 109 60-140122 11 3020ND21.8 24.4
Bromoform ug/L 20 107 60-140117 9 3020ND21.4 23.4
Bromomethane ug/L M1205260-14064 21 3020ND10.3 12.8
Carbon tetrachloride ug/L 20 119 60-140133 11 3020ND23.8 26.6
Chlorobenzene ug/L 20 114 60-140126 10 3020ND22.8 25.1
Chloroethane ug/L 20 120 60-140129 7 3020ND24.0 25.8
Chloroform ug/L 20 109 60-140114 4 3020ND21.9 22.8
Chloromethane ug/L 20 107 60-140118 10 3020ND21.5 23.7
cis-1,2-Dichloroethene ug/L 20 116 60-140119 2 3020ND23.2 23.7
cis-1,3-Dichloropropene ug/L 20 107 60-140116 8 3020ND21.4 23.2
Dibromochloromethane ug/L 20 112 60-140120 7 3020ND22.4 24.1
Dibromomethane ug/L 20 109 60-140114 5 3020ND21.8 22.9
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 28 of 39
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
Parameter Units
MS
Result
% Rec
Limits Qual% RecConc.
4027681MATRIX SPIKE & MATRIX SPIKE DUPLICATE:
MSSpike
Result
92667797014
4027682
MSD
Result
MSD
% Rec RPD RPD
Max
MSDMS
Spike
Conc.
Dichlorodifluoromethane ug/L 20 123 60-140127 3 3020ND24.5 25.3
Diisopropyl ether ug/L 20 109 60-140117 7 3020ND21.8 23.4
Ethanol ug/L 800 115 60-140117 2 30800ND918935
Ethylbenzene ug/L 20 116 60-140125 7 30200.37J 23.6 25.4
Hexachloro-1,3-butadiene ug/L 20 114 60-140121 6 3020ND22.8 24.1
Isopropylbenzene
(Cumene)ug/L 20 120 60-140130 8 3020ND23.9 26.0
m&p-Xylene ug/L 40 116 60-140124 7 3040ND46.3 49.8
Methyl-tert-butyl ether ug/L 20 108 60-140111 3 3020ND21.6 22.3
Methylene Chloride ug/L 20 114 60-140121 6 3020ND22.7 24.2
n-Butylbenzene ug/L 20 119 60-140131 10 3020ND23.8 26.2
n-Propylbenzene ug/L 20 113 60-140124 10 3020ND22.5 24.9
Naphthalene ug/L 20 125 60-140140 11 3020ND24.9 28.0
o-Xylene ug/L 20 115 60-140121 5 3020ND22.9 24.2
sec-Butylbenzene ug/L 20 114 60-140126 10 3020ND22.7 25.1
Styrene ug/L 20 113 60-140125 10 3020ND22.6 25.0
tert-Butylbenzene ug/L 20 96 60-140103 7 3020ND19.1 20.6
Tetrachloroethene ug/L 20 121 60-140127 5 3020ND24.1 25.3
Toluene ug/L 20 113 60-140118 4 3020ND22.7 23.6
trans-1,2-Dichloroethene ug/L 20 118 60-140128 9 3020ND23.5 25.7
trans-1,3-Dichloropropene ug/L 20 106 60-140114 8 3020ND21.1 22.8
Trichloroethene ug/L 20 114 60-140119 4 3020ND22.8 23.9
Trichlorofluoromethane ug/L 20 116 60-140118 1 3020ND23.2 23.5
Vinyl chloride ug/L 20 95 60-140104 9 3020ND19.0 20.8
1,2-Dichloroethane-d4 (S)%106 70-130103
4-Bromofluorobenzene (S)%99 70-13099
Toluene-d8 (S)%96 70-13099
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 29 of 39
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
QC Batch:
QC Batch Method:
Analysis Method:
Analysis Description:
776582
SM 6200B
SM 6200B
6200B MSV
Laboratory:Pace Analytical Services - Charlotte
Associated Lab Samples:92668455002, 92668455005, 92668455007, 92668455008
Parameter Units
Blank
Result
Reporting
Limit Qualifiers
METHOD BLANK:4028869
Associated Lab Samples:92668455002, 92668455005, 92668455007, 92668455008
Matrix:Water
AnalyzedMDL
1,1,1,2-Tetrachloroethane ug/L ND 0.50 05/24/23 11:350.31
1,1,1-Trichloroethane ug/L ND 0.50 05/24/23 11:350.33
1,1,2,2-Tetrachloroethane ug/L ND 0.50 05/24/23 11:350.22
1,1,2-Trichloroethane ug/L ND 0.50 05/24/23 11:350.32
1,1-Dichloroethane ug/L ND 0.50 05/24/23 11:350.37
1,1-Dichloroethene ug/L ND 0.50 05/24/23 11:350.35
1,1-Dichloropropene ug/L ND 0.50 05/24/23 11:350.43
1,2,3-Trichlorobenzene ug/L ND 2.0 05/24/23 11:350.81
1,2,3-Trichloropropane ug/L ND 0.50 05/24/23 11:350.26
1,2,4-Trichlorobenzene ug/L ND 2.0 05/24/23 11:350.64
1,2,4-Trimethylbenzene ug/L ND 0.50 05/24/23 11:350.50
1,2-Dibromo-3-chloropropane ug/L ND 1.0 05/24/23 11:350.34
1,2-Dibromoethane (EDB)ug/L ND 0.50 05/24/23 11:350.27
1,2-Dichlorobenzene ug/L ND 0.50 05/24/23 11:350.34
1,2-Dichloroethane ug/L ND 0.50 05/24/23 11:350.32
1,2-Dichloropropane ug/L ND 0.50 05/24/23 11:350.36
1,3,5-Trimethylbenzene ug/L ND 0.50 05/24/23 11:350.33
1,3-Dichlorobenzene ug/L ND 0.50 05/24/23 11:350.34
1,3-Dichloropropane ug/L ND 0.50 05/24/23 11:350.28
1,4-Dichlorobenzene ug/L ND 0.50 05/24/23 11:350.33
2,2-Dichloropropane ug/L ND 0.50 05/24/23 11:350.39
2-Chlorotoluene ug/L ND 0.50 05/24/23 11:350.32
4-Chlorotoluene ug/L ND 0.50 05/24/23 11:350.32
Benzene ug/L ND 0.50 05/24/23 11:350.34
Bromobenzene ug/L ND 0.50 05/24/23 11:350.29
Bromochloromethane ug/L ND 0.50 05/24/23 11:350.47
Bromodichloromethane ug/L ND 0.50 05/24/23 11:350.31
Bromoform ug/L ND 0.50 05/24/23 11:350.34
Bromomethane ug/L ND 5.0 05/24/23 11:351.7
Carbon tetrachloride ug/L ND 0.50 05/24/23 11:350.33
Chlorobenzene ug/L ND 0.50 05/24/23 11:350.28
Chloroethane ug/L ND 1.0 05/24/23 11:350.65
Chloroform ug/L ND 0.50 05/24/23 11:350.43
Chloromethane ug/L ND 1.0 05/24/23 11:350.54
cis-1,2-Dichloroethene ug/L ND 0.50 05/24/23 11:350.38
cis-1,3-Dichloropropene ug/L ND 0.50 05/24/23 11:350.36
Dibromochloromethane ug/L ND 0.50 05/24/23 11:350.36
Dibromomethane ug/L ND 0.50 05/24/23 11:350.39
Dichlorodifluoromethane ug/L ND 0.50 IH05/24/23 11:350.35
Diisopropyl ether ug/L ND 0.50 05/24/23 11:350.31
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 30 of 39
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
Parameter Units
Blank
Result
Reporting
Limit Qualifiers
METHOD BLANK:4028869
Associated Lab Samples:92668455002, 92668455005, 92668455007, 92668455008
Matrix:Water
AnalyzedMDL
Ethanol ug/L ND 200 05/24/23 11:3572.2
Ethylbenzene ug/L ND 0.50 05/24/23 11:350.30
Hexachloro-1,3-butadiene ug/L ND 2.0 05/24/23 11:351.5
Isopropylbenzene (Cumene)ug/L ND 0.50 05/24/23 11:350.33
m&p-Xylene ug/L ND 1.0 05/24/23 11:350.71
Methyl-tert-butyl ether ug/L ND 0.50 05/24/23 11:350.42
Methylene Chloride ug/L ND 2.0 05/24/23 11:352.0
n-Butylbenzene ug/L ND 0.50 05/24/23 11:350.49
n-Propylbenzene ug/L ND 0.50 05/24/23 11:350.34
Naphthalene ug/L ND 2.0 05/24/23 11:350.64
o-Xylene ug/L ND 0.50 05/24/23 11:350.34
sec-Butylbenzene ug/L ND 0.50 05/24/23 11:350.40
Styrene ug/L ND 0.50 05/24/23 11:350.29
tert-Butylbenzene ug/L ND 0.50 05/24/23 11:350.32
Tetrachloroethene ug/L ND 0.50 05/24/23 11:350.29
Toluene ug/L ND 0.50 05/24/23 11:350.24
trans-1,2-Dichloroethene ug/L ND 0.50 05/24/23 11:350.40
trans-1,3-Dichloropropene ug/L ND 0.50 05/24/23 11:350.36
Trichloroethene ug/L ND 0.50 05/24/23 11:350.38
Trichlorofluoromethane ug/L ND 1.0 05/24/23 11:350.30
Vinyl chloride ug/L ND 1.0 05/24/23 11:350.39
1,2-Dichloroethane-d4 (S)%110 70-130 05/24/23 11:35
4-Bromofluorobenzene (S)%106 70-130 05/24/23 11:35
Toluene-d8 (S)%97 70-130 05/24/23 11:35
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
4028870LABORATORY CONTROL SAMPLE:
LCSSpike
1,1,1,2-Tetrachloroethane ug/L 19.320 96 60-140
1,1,1-Trichloroethane ug/L 21.620 108 60-140
1,1,2,2-Tetrachloroethane ug/L 20.820 104 60-140
1,1,2-Trichloroethane ug/L 19.720 98 60-140
1,1-Dichloroethane ug/L 24.720 123 60-140
1,1-Dichloroethene ug/L 25.820 129 60-140
1,1-Dichloropropene ug/L 25.520 128 60-140
1,2,3-Trichlorobenzene ug/L 17.320 87 60-140
1,2,3-Trichloropropane ug/L 20.120 101 60-140
1,2,4-Trichlorobenzene ug/L 18.120 90 60-140
1,2,4-Trimethylbenzene ug/L 21.620 108 60-140
1,2-Dibromo-3-chloropropane ug/L 16.920 84 60-140
1,2-Dibromoethane (EDB)ug/L 20.320 102 60-140
1,2-Dichlorobenzene ug/L 20.120 100 60-140
1,2-Dichloroethane ug/L 23.920 119 60-140
1,2-Dichloropropane ug/L 23.220 116 60-140
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 31 of 39
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
4028870LABORATORY CONTROL SAMPLE:
LCSSpike
1,3,5-Trimethylbenzene ug/L 21.720 108 60-140
1,3-Dichlorobenzene ug/L 20.720 104 60-140
1,3-Dichloropropane ug/L 20.820 104 60-140
1,4-Dichlorobenzene ug/L 19.720 99 60-140
2,2-Dichloropropane ug/L 23.420 117 60-140
2-Chlorotoluene ug/L 22.820 114 60-140
4-Chlorotoluene ug/L 22.420 112 60-140
Benzene ug/L 20.420 102 60-140
Bromobenzene ug/L 20.020 100 60-140
Bromochloromethane ug/L 21.820 109 60-140
Bromodichloromethane ug/L 18.720 93 60-140
Bromoform ug/L 15.320 76 60-140
Bromomethane ug/L 12.720 64 60-140
Carbon tetrachloride ug/L 16.820 84 60-140
Chlorobenzene ug/L 20.820 104 60-140
Chloroethane ug/L 28.7 L12014460-140
Chloroform ug/L 23.720 119 60-140
Chloromethane ug/L 25.720 129 60-140
cis-1,2-Dichloroethene ug/L 23.720 118 60-140
cis-1,3-Dichloropropene ug/L 19.420 97 60-140
Dibromochloromethane ug/L 17.520 88 60-140
Dibromomethane ug/L 18.420 92 60-140
Dichlorodifluoromethane ug/L 29.7 IH,L12014960-140
Diisopropyl ether ug/L 23.120 116 60-140
Ethanol ug/L 966800 121 60-140
Ethylbenzene ug/L 21.320 107 60-140
Hexachloro-1,3-butadiene ug/L 18.020 90 60-140
Isopropylbenzene (Cumene)ug/L 20.620 103 60-140
m&p-Xylene ug/L 42.840 107 60-140
Methyl-tert-butyl ether ug/L 22.620 113 60-140
Methylene Chloride ug/L 23.820 119 60-140
n-Butylbenzene ug/L 22.520 112 60-140
n-Propylbenzene ug/L 22.520 113 60-140
Naphthalene ug/L 20.220 101 60-140
o-Xylene ug/L 21.620 108 60-140
sec-Butylbenzene ug/L 21.220 106 60-140
Styrene ug/L 21.820 109 60-140
tert-Butylbenzene ug/L 17.420 87 60-140
Tetrachloroethene ug/L 17.120 85 60-140
Toluene ug/L 18.720 94 60-140
trans-1,2-Dichloroethene ug/L 27.720 138 60-140
trans-1,3-Dichloropropene ug/L 18.320 92 60-140
Trichloroethene ug/L 20.420 102 60-140
Trichlorofluoromethane ug/L 22.020 110 60-140
Vinyl chloride ug/L 21.220 106 60-140
1,2-Dichloroethane-d4 (S)%117 70-130
4-Bromofluorobenzene (S)%100 70-130
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 32 of 39
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
4028870LABORATORY CONTROL SAMPLE:
LCSSpike
Toluene-d8 (S)%95 70-130
Parameter Units
MS
Result
% Rec
Limits Qual% RecConc.
4028871MATRIX SPIKE & MATRIX SPIKE DUPLICATE:
MSSpike
Result
92668519002
4028872
MSD
Result
MSD
% Rec RPD RPD
Max
MSDMS
Spike
Conc.
1,1,1,2-Tetrachloroethane ug/L 20 105 60-140104 1 3020ND21.1 20.9
1,1,1-Trichloroethane ug/L 20 125 60-140121 3 3020ND25.1 24.2
1,1,2,2-Tetrachloroethane ug/L 20 118 60-140114 3 3020ND23.5 22.8
1,1,2-Trichloroethane ug/L 20 111 60-140113 2 3020ND22.3 22.7
1,1-Dichloroethane ug/L M12013860-140146 5 3020ND27.6 29.1
1,1-Dichloroethene ug/L M12014760-140160 8 3020ND29.4 32.0
1,1-Dichloropropene ug/L M12015060-140151 1 3020ND30.0 30.3
1,2,3-Trichlorobenzene ug/L 20 86 60-14089 3 3020ND17.2 17.8
1,2,3-Trichloropropane ug/L 20 111 60-140109 2 3020ND22.2 21.8
1,2,4-Trichlorobenzene ug/L 20 90 60-14096 6 3020ND18.1 19.3
1,2,4-Trimethylbenzene ug/L 20 116 60-140119 2 3020ND23.2 23.8
1,2-Dibromo-3-
chloropropane ug/L 20 89 60-14086 3 3020ND17.8 17.3
1,2-Dibromoethane (EDB)ug/L 20 110 60-140112 2 3020ND22.1 22.4
1,2-Dichlorobenzene ug/L 20 106 60-140108 2 3020ND21.2 21.6
1,2-Dichloroethane ug/L 20 127 60-140115 10 3020ND25.5 23.1
1,2-Dichloropropane ug/L 20 132 60-140130 1 3020ND26.3 26.1
1,3,5-Trimethylbenzene ug/L 20 119 60-140119 0 3020ND23.8 23.8
1,3-Dichlorobenzene ug/L 20 112 60-140112 1 3020ND22.5 22.3
1,3-Dichloropropane ug/L 20 118 60-140117 1 3020ND23.6 23.4
1,4-Dichlorobenzene ug/L 20 107 60-140106 0 3020ND21.4 21.3
2,2-Dichloropropane ug/L 20 129 60-140124 4 3020ND25.8 24.9
2-Chlorotoluene ug/L 20 127 60-140124 2 3020ND25.5 24.9
4-Chlorotoluene ug/L 20 127 60-140125 1 3020ND25.4 25.1
Benzene ug/L 20 123 60-140124 1 3020ND24.6 24.9
Bromobenzene ug/L 20 109 60-140108 1 3020ND21.8 21.6
Bromochloromethane ug/L 20 123 60-140122 0 3020ND24.5 24.4
Bromodichloromethane ug/L 20 98 60-140103 5 3020ND19.6 20.6
Bromoform ug/L 20 80 60-14080 0 3020ND15.9 15.9
Bromomethane ug/L 20 82 60-14089 9 3020ND16.4 17.9
Carbon tetrachloride ug/L 20 104 60-140101 3 3020ND20.9 20.2
Chlorobenzene ug/L 20 113 60-140113 0 3020ND22.5 22.6
Chloroethane ug/L M02015760-140164 4 3020ND31.5 32.8
Chloroform ug/L 20 134 60-140131 2 3020ND26.8 26.2
Chloromethane ug/L M12016160-140170 6 3020ND32.1 34.0
cis-1,2-Dichloroethene ug/L 20 139 60-140138 1 3020ND27.8 27.6
cis-1,3-Dichloropropene ug/L 20 105 60-140110 5 3020ND21.0 21.9
Dibromochloromethane ug/L 20 99 60-14098 0 3020ND19.7 19.7
Dibromomethane ug/L 20 99 60-14098 1 3020ND19.8 19.6
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 33 of 39
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
Parameter Units
MS
Result
% Rec
Limits Qual% RecConc.
4028871MATRIX SPIKE & MATRIX SPIKE DUPLICATE:
MSSpike
Result
92668519002
4028872
MSD
Result
MSD
% Rec RPD RPD
Max
MSDMS
Spike
Conc.
Dichlorodifluoromethane ug/L IH,M02018160-140194 7 3020ND36.2 38.8
Diisopropyl ether ug/L 20 123 60-140128 4 3020ND24.6 25.7
Ethanol ug/L 800 127 60-140134 6 30800ND10201070
Ethylbenzene ug/L 20 116 60-140116 0 3020ND23.2 23.2
Hexachloro-1,3-butadiene ug/L 20 96 60-140103 8 3020ND19.1 20.6
Isopropylbenzene
(Cumene)ug/L 20 113 60-140114 1 3020ND22.5 22.8
m&p-Xylene ug/L 40 113 60-140115 1 3040ND45.2 45.8
Methyl-tert-butyl ether ug/L 20 109 60-140111 2 3020ND21.8 22.2
Methylene Chloride ug/L 20 121 60-140118 3 3020ND24.3 23.6
n-Butylbenzene ug/L 20 124 60-140124 0 3020ND24.8 24.8
n-Propylbenzene ug/L 20 126 60-140124 1 3020ND25.1 24.9
Naphthalene ug/L 20 98 60-140105 7 3020ND19.6 21.0
o-Xylene ug/L 20 109 60-140111 2 3020ND21.8 22.2
sec-Butylbenzene ug/L 20 121 60-140120 1 3020ND24.3 24.1
Styrene ug/L 20 112 60-140115 2 3020ND22.5 23.0
tert-Butylbenzene ug/L 20 98 60-14099 1 3020ND19.5 19.7
Tetrachloroethene ug/L 20 100 60-140101 1 3020ND19.9 20.1
Toluene ug/L 20 112 60-140110 2 3020ND22.5 22.1
trans-1,2-Dichloroethene ug/L M12015060-140151 0 3020ND30.1 30.2
trans-1,3-Dichloropropene ug/L 20 102 60-140103 0 3020ND20.5 20.6
Trichloroethene ug/L 20 114 60-140114 0 3020ND22.7 22.8
Trichlorofluoromethane ug/L 20 129 60-140138 7 3020ND25.7 27.7
Vinyl chloride ug/L M12013460-140149 10 3020ND26.9 29.7
1,2-Dichloroethane-d4 (S)%116 70-130108
4-Bromofluorobenzene (S)%104 70-130105
Toluene-d8 (S)%102 70-130102
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 34 of 39
#=QL#
QUALIFIERS
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
DEFINITIONS
DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot.
ND - Not Detected at or above adjusted reporting limit.
TNTC - Too Numerous To Count
J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
MDL - Adjusted Method Detection Limit.
PQL - Practical Quantitation Limit.
RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and
bias for a specific analyte in a specific matrix.
S - Surrogate
1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is
a combined concentration.
Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values.
LCS(D) - Laboratory Control Sample (Duplicate)
MS(D) - Matrix Spike (Duplicate)
DUP - Sample Duplicate
RPD - Relative Percent Difference
NC - Not Calculable.
SG - Silica Gel - Clean-Up
U - Indicates the compound was analyzed for, but not detected.
Acid preservation may not be appropriate for 2 Chloroethylvinyl ether.
A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA
Method 8260.
N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for
each analyte is a combined concentration.
Reported results are not rounded until the final step prior to reporting. Therefore, calculated parameters that are typically reported as
"Total" may vary slightly from the sum of the reported component parameters.
Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes.
TNI - The NELAC Institute.
ANALYTE QUALIFIERS
Results are from sample aliquot taken from VOA vial with headspace (air bubble greater than 6 mm diameter).HS
This analyte exceeded secondary source verification criteria high for the initial calibration. The reported results should be
considered an estimated value.IH
Analyte recovery in the laboratory control sample (LCS) was above QC limits. Results for this analyte in associated
samples may be biased high.L1
Matrix spike recovery and/or matrix spike duplicate recovery was outside laboratory control limits.M0
Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery.M1
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 35 of 39
#=CR#
QUALITY CONTROL DATA CROSS REFERENCE TABLE
Pace Project No.:
Project:
92668455
FORMER HUFFSTICKLER EXXON
Lab ID Sample ID QC Batch Method QC Batch Analytical Method
Analytical
Batch
92668455001 776316MW-1 SM 6200B
92668455002 776582MW-2 SM 6200B
92668455003 776316MW-3 SM 6200B
92668455004 776316MW-5 SM 6200B
92668455005 776582MW-6 SM 6200B
92668455006 776316MW-7 SM 6200B
92668455007 776582MW-8 SM 6200B
92668455008 776582MW-9 SM 6200B
92668455009 775967FIELD BLANK SM 6200B
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 05/26/2023 10:15 AM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 36 of 39
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