RA-780_5499_CA_MRP_20230501

2725 E. Millbrook Road, Suite 121
Raleigh, NC 27604
Telephone [phone]
www.oneatlas.com

May 1, 2023

Ms. Linda Blalock
North Carolina Department of Environmental Quality
Division of Waste Management – Underground Storage Tank Section
1646 Mail Service Center
Raleigh, North Carolina 27699

Subject: Groundwater Monitoring Report
Hobgood Service Center
219 Commerce Street
Hobgood, Halifax County, North Carolina
NCDEQ Incident #5499 / UST # RA-780

Dear Ms. Blalock:

ATC Associates of North Carolina, P.C. (ATC) is submitting the enclosed Groundwater Monitoring Report for
the Hobgood Service Center site. The report presents investigative procedures, field activities, and laboratory
analytical results for monitoring well installation and groundwater sampling activities conducted in March 2023.

If you have any questions or require additional information, please contact our office at [phone].

Sincerely,
ATC Associates of North Carolina, P.C.

Nicholas Kramer Ashley M. W. Offer, P.G.
Staff Scientist Senior Project Manager
Direct Line: 919-573-1198 Direct Line: 919-573-1206
Email: [e-mail] Email: [e-mail]

Attachments:
1. Groundwater Monitoring Report

Prepared for:

North Carolina Department of Environmental Quality
Division of Waste Management – Underground Storage Tank Section
1646 Mail Service Center
Raleigh, North Carolina 27699

GROUNDWATER MONITORING REPORT
Hobgood Service Center
219 Commerce Street
Hobgood, Halifax County, North Carolina
Incident #5499

ATC Project No. SLC0549903

Prepared by:

ATC Associates of North Carolina, P.C.
2725 E. Millbrook Road, Suite 121
Raleigh, North Carolina 27604
Telephone [phone]

Nicholas Kramer
Staff Scientist
Direct Line: 919-573-1198
Email: [e-mail]

Ashley M. W. Offer, P.G.
Senior Project Manager
Direct Line: 919-573-1206
Email: [e-mail]

May 1, 2023

Hobgood Service Center
May 1, 2023
Page i

ATC Project No. SLC0549903 NCDEQ State Lead Program
Table of Contents
1.0 SITE IDENTIFICATION .......................................................................................................................... 1
2.0 EXECUTIVE SUMMARY ........................................................................................................................ 2
3.0 SITE DESCRIPTION .............................................................................................................................. 2
3.1 SITE CHARACTERIZATION .................................................................................................................................... 2
3.2 SITE BACKGROUND ............................................................................................................................................ 3
3.3 SITE AND REGIONAL GEOLOGY ............................................................................................................................. 4
3.4 SITE AND REGIONAL HYDROGEOLOGY.................................................................................................................... 5
4.0 GROUNDWATER ASSESSMENT ACTIVITIES .................................................................................. 5
4.1 MONITORING WELL INSTALLATION ACTIVITIES ........................................................................................................ 5
4.2 GROUNDWATER LEVELS...................................................................................................................................... 5
4.3 GROUNDWATER QUALITY ................................................................................................................................... 6
5.0 CONCLUSIONS AND RECOMMENDATIONS .................................................................................... 6

TABLES:
Table 1 – Water Supply Well Information
Table 2 – Monitoring Well Construction and Groundwater Elevation Data
Table 3 – Field Parameters
Table 4 – Current Groundwater Analytical Data
Table 5 – Historical Groundwater Analytical Data

FIGURES:
Figure 1 – Vicinity Map
Figure 2 – Site Map
Figure 3 – Potential Receptor Map
Figure 4 – Groundwater Elevation Contour Map
Figure 5 – Dissolved Benzene Isoconcentration Map
Figure 6 – Additional Constituents of Concern Map

APPENDICES:
Appendix A – Field Notes
Appendix B – Site Photographs
Appendix C – Boring Logs and Well Construction Records
Appendix D – Laboratory Analytical Results

Hobgood Service Center
May 1, 2023
Page 2 of 6

ATC Project No. SLC0549903 NCDEQ State Lead Program
2.0 EXECUTIVE SUMMARY

ATC Associates of North Carolina, P.C. (ATC) has completed a Groundwater Monitoring Report for the
Hobgood Service Center site. This report documents groundwater assessment activities conducted at the
site in March 2023. The activities were performed based on the January 10, 2023, Task Authorization (TA-
03) by the Trust Fund Branch of the Underground Storage Tank (UST) Section, Division of Waste
Management (DWM), North Carolina Department of Environmental Quality (NCDEQ). The work is being
performed as part of State Lead Contract #N122019A between NCDEQ and ATC.

The Hobgood Service Center site is located at 219 Commerce Street in Hobgood, Halifax County, North
Carolina. The site is currently developed with one single-story building that is currently vacant. Six
monitoring wells (MW-1, MW-2, MW-3, MW-4, MW-5, and DW-1) and one recovery well (RW-1) are
associated with the site. The UST system formerly located on the property consisted of two 8,000-gallon
gasoline USTs and two 1,000-gallon USTs of unknown contents. The installation date of the USTs is
unknown and the USTs were removed from the site in June 1990. There are seven water supply wells are
located within 1,000 feet of the site; two of which are used by the Town as a water source for Hobgood.
The remaining five water supply wells have an active municipal account and are non-potable wells.
Municipal water is available to properties in the area

On March 20 and 21, 2023, ATC oversaw the installation of one Type II monitoring well (MW-5) and one
Type III monitoring well (DW-1) to delineate the groundwater impacts. On March 27, 2023, ATC mobilized
to the site to collect groundwater samples from all existing monitoring wells. Based on the data, groundwater
flows to the southwest across the site. Light non-aqueous phase liquid (LNAPL) was not detected. The
laboratory analytical results identified contaminant concentrations exceeding Title 15A NCAC 02L .0202
Groundwater Quality Standards (2L Standards) in monitoring wells MW-1 and MW-5. No compounds were
detected above the respective Gross Contaminant Levels (GCLs). No compounds exceeding the
corresponding 2L Standards were identified in the remaining sampled wells. The vertical extent of
groundwater impacts have been successfully delineated; however, horizontal impacts to the west and
southwest have not been adequately delineated.

ATC recommends installing two additional Type II wells to the south and west of MW-5 to delineate the
horizontal extent of the groundwater contamination, as well as continuing groundwater monitoring at the
site of select wells.

3.0 SITE DESCRIPTION

3.1 SITE CHARACTERIZATION

The former Hobgood Service Center is located at 219 Commerce Street in Hobgood, Halifax County, North
Carolina. The site is currently developed with a single-story building, which is vacant. There are six
monitoring wells (MW-1 through MW-5 and DW-1) and one recovery well (RW-1) associated with the site.
The site property was formerly a service station and retail petroleum facility. The UST system consisted of
two 8,000-gallon gasoline USTs and two 1,000-gallon USTs of unknown contents that were removed from
the site in June 1990.

The site is bound to the north by Commerce Street, to the west by Pine Street, to the east by a commercial
structure, and to south by a storage yard for the Town of Hobgood. The site vicinity is characterized as
commercial, residential, and undeveloped land. Municipal water is available to properties in the area. Seven
water supply wells are located within 1,000 feet of the site, two of which are used by the Town as a water
source for Hobgood. The remaining water supply wells are used for non-potable purposes. Water supply
well ownership information is included in Table 1. A site topographic map is included as Figure 1 and a
site map depicting monitoring well locations and other pertinent site features is included as Figure 2. A
map showing water supply well locations is included as Figure 3.

Hobgood Service Center
May 1, 2023
Page 3 of 6

ATC Project No. SLC0549903 NCDEQ State Lead Program
3.2 SITE BACKGROUND

In August 1989, Halifax County reported that a water supply well owned by Ms. Magdeline Flanagan was
contaminated by a petroleum release. Upon inspection, it was determined the well was impacted due to
contact between gasoline impacted soils and the PVC water service line connected to the residence.
Presumably, the gasoline contamination permeated the PVC or dissolved the PVC glue at one or more
piping joints and tainted the water quality. A steel water line was installed to replace the PVC service line.

In March 1990, soil samples were collected from the Flanagan Residence, Hobgood Service Center, and
the Anthony Residence. Soil samples identified petroleum impacts on each property. In addition, a stream
is located approximately 300 feet southwest of the site was noted to have a petroleum sheen.

In June 1990, Mrs. Robert Anthony (UST owner) removed two 8,000-gallon gasoline USTs and two 1,000-
gallon USTs of unknown contents from the site. During UST removal, LNAPL was discovered. Impacted
soil was also identified during closure activities above the NCDEQ Action Level for the two 8,000-gallon
gasoline USTs. Soil samples were not collected from the UST basin containing the two former 1,000-gallon
USTs of unknown contents. Following removal, recovery well RW-1 was installed in the former UST pit for
future product recovery activities.

In November 1991, a letter report documenting previous site activities and current site conditions was
submitted. The report recommended continued assessment at the site. However, the report also
documented that neighboring properties were supplied municipal water. As a result, the site was assigned
a “Low” risk.

On October 8, 2004, a Phase I Limited Site Assessment was submitted. The receptor survey indicated that
two Town of Hobgood municipal wells were located within 1,000 feet of the site and that it appeared
petroleum was discharging into a nearby stream behind Ms. Flanagan’s Residence (approximately 300 feet
southwest of the site). Monitoring well MW-1 was installed in the former UST pit during LSA activities. Soil
and groundwater results indicated compounds exceeding Soil-to-Groundwater Maximum Soil Contaminant
Concentrations (MSCCs) and 2L Standards, respectively. A water supply well sample was also collected
from Ms. Flanagan’s well and did not indicate petroleum impacts.

On June 20, 2006, a Municipal Water Supply Well Sampling Results report was submitted. The report
documented laboratory results for the two Hobgood municipal wells. The laboratory results did not indicate
any detectable compounds.

A Letter Report and Updated Receptor Survey Report was submitted on July 9, 2015. The receptor survey
indicated six water supply wells located within 1,000 feet of the site, two of which are used for supplying
water to the Town of Hobgood (WSW-1 and WSW-2), one which is used for irrigation (WSW-3), one of
which has an unknown use (WSW-5), and two which are currently inactive (WSW-6 and WSW-7). In
addition, the nearest identified surface water body is located approximately 630 feet west of the site.
Monitoring well MW-1 contained LNAPL at a thickness of 0.24 feet. One surface water sample was collected
and did not indicate any compounds above laboratory detection limits.

A Groundwater Monitoring Report was submitted on December 16, 2015, documenting the installation of
monitoring wells MW-2 and MW-3, an aggressive fluid vapor recovery (AFVR) event on MW-1, and a
comprehensive groundwater monitoring event. The AFVR event recovered approximately 1,126 gallons of
petroleum impacted groundwater. LNAPL was detected in monitoring well MW-1 at a thickness of 0.12 feet
prior to the AFVR event but was absent following the event. No compounds were detected in monitoring
wells MW-2 and MW-3 above laboratory detection limits. ATC recommended performing an additional
AFVR event on monitoring well MW-1 in an attempt to remove LNAPL from the site, the installation of one
additional monitoring well, and a soil assessment.

A Groundwater Monitoring Report was submitted on July 15, 2016, documenting the installation of
monitoring well MW-4, an AFVR event, and a soil and groundwater sampling event from borings SB-1
Hobgood Service Center
May 1, 2023
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ATC Project No. SLC0549903 NCDEQ State Lead Program
through SB-3. Soil sampling activities indicated compounds exceeding Soil-to-Groundwater MSCCs in the
vicinity of the UST basin northwest of the onsite building. Lead was detected above 2L Standard in
groundwater collected from two of the three borings. The AFVR event recovered approximately 1,128
gallons of petroleum impacted groundwater. LNAPL was detected in monitoring well MW-1 at a thickness
of 0.50 feet prior to the event. LNAPL was not detected following the event. ATC recommended performing
an additional AFVR event on monitoring well MW-1 in an attempt to remove LNAPL from the site.

On November 30, 2016, a Free Product Recovery Report was submitted documenting an AFVR event on
MW-1. Approximately 1,265 gallons of groundwater were recovered during the event. At the conclusion of
the event, a sorbent sock was installed in MW-1. ATC recommended performing a groundwater monitoring
event to determine the effectiveness of the AFVR event.

Groundwater Monitoring Reports were submitted on May 18, 2017, and August 7, 2018, documenting
sampling events performed at the site. Laboratory analytical results for both events indicated petroleum
compounds exceeding the 2L Standards in MW-1. No other wells exhibited concentrations above the 2L
Standards.

An Injection Event Letter Report was submitted on February 9, 2019, documenting the injection of Enviro-
BAC in monitoring well MW-1 in an attempt to reduce compound concentrations to below 2L Standards.
ATC recommended collecting a sample from monitoring well MW-1 thirty days after the injection event and
performing a comprehensive sampling event for all monitoring wells sixty days after the injection event.

On May 2, 2019, a Groundwater Monitoring Report documenting the 30-day and 60-day post-Enviro-BAC
injection sampling events was submitted. Laboratory analytical results collected thirty and sixty days post-
injection indicated petroleum compounds exceeding the 2L Standards in MW-1 for both events. No other
wells exhibited concentrations above the 2L Standards. It was noted contaminant concentrations had
decreased in MW-1 by an average of 52% since the February 2019 injection event. ATC recommended
resampling the site in six months to continue monitoring concentrations trends.

On November 7, 2019, a Groundwater Monitoring Report documenting the 6-month post-Enviro-BAC
injection sampling event was submitted. Laboratory analytical results collected six months post-injection
indicated petroleum compounds exceeding the 2L Standards in MW-1. No other wells exhibited
concentrations above the 2L Standards. Contaminant concentrations had decreased in MW-1 by an
average of 35% since the February 2019 injection event and appeared to be rebounding to historical levels.
ATC recommended resampling the site in six months to continue monitoring post-injection concentrations
trends.

On May 8, 2020, a Groundwater Monitoring Report documenting a comprehensive sampling event was
submitted. Laboratory analytical results indicated petroleum compounds exceeding the 2L Standards in
MW-1. No other wells exhibited concentrations above the 2L Standards. The sampling event was conducted
approximately one year after an injection of EnviroBAC into monitoring well MW-1. Contaminant
concentrations had rebounded in MW-1 by an average of 16% since the February 2019 injection event and
several contaminant concentrations were detected above historical levels.

This report documents the March 2023 monitoring well installation and groundwater sampling event.

3.3 SITE AND REGIONAL GEOLOGY

The site is located in the Yorktown Formation of the Inner Coastal Plain Physiographic Region. The
Yorktown Formation is comprised of fossiliferous clay with varying amounts of fine-grained sand, bluish
gray, shell material commonly concentrated in lenses. The Yorktown Formation is primarily located to the
north of Neuse River. According to the United States Department of Agriculture Web Soil Survey, the site
is underlain by Exum silt loam which is characterized by 0 to 2 percent slopes, is moderately well drained,
and has a moderately high ability to transmit water. Lithology encountered at the site during previous
Hobgood Service Center
May 1, 2023
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ATC Project No. SLC0549903 NCDEQ State Lead Program
assessment activities indicated interbedded layers of sand, clay, and silt to approximately 35 feet below
ground surface (bgs).

3.4 SITE AND REGIONAL HYDROGEOLOGY

The occurrence and movement of groundwater in the Piedmont is within two separate but interconnected
water-bearing zones. A shallow water-bearing zone occurs within the surficial soils and a deeper zone
occurs within the underlying bedrock. Groundwater in the shallow soil zone occurs in the interstitial pore
spaces between the grains comprising the surficial soils. Groundwater in this zone is typically unconfined.
Groundwater movement is generally lateral from recharge areas to small streams that serve as localized
discharge points. The occurrence and movement of groundwater in the underlying water-bearing zone
within the crystalline bedrock is controlled by secondary joints, fractures and faults within the bedrock. On
a regional scale, the direction of groundwater flow is typically from uplands to major streams and
groundwater sinks. Based on historic measurements, groundwater at the site averages approximately 8.53
feet bgs and groundwater flow direction is typically inferred to flow to the south-southwest. The horizontal
hydraulic calculated using the elevation data from the March 2023 monitoring event for monitoring wells
MW-1 and MW-4 is 0.0175 ft/ft.

4.0 GROUNDWATER ASSESSMENT ACTIVITIES

4.1 MONITORING WELL INSTALLATION ACTIVITIES

On March 20 and 21, 2023, ATC supervised Geologic Exploration, Inc., (GEX) during the installation of one
Type II monitoring well (MW-5) and one Type III monitoring well (DW-1). Monitoring well MW-5 was installed
off-site on the west adjacent property, across South Pine Street, located downgradient of the source area.
Well MW-5 was installed to a depth of approximately 15 feet bgs and is constructed of 2-inch diameter
polyvinyl chloride (PVC) piping with 10 feet of 0.010-inch slotted screen section and 5 feet of solid PVC
casing. Well DW-1 was installed in the source area on the site property to vertically delineate groundwater
impacts. The outer casing of the well is constructed of 6-inch diameter PVC and was set at 28 feet bgs with
an inner 2-inch diameter PVC casing set at 35 feet bgs with 5 feet of 0.010-inch slotted screen section and
30 feet of solid PVC casing. The wells were installed using a hand auger from ground surface to 5 feet bgs
and hollow-stem augers from 5 feet bgs to 15 feet bgs and/or 35 feet bgs. Lithology encountered during the
drilling consisted of brown silt, clayey silt, and sand to 10 feet bgs, brown silty sand and sandy silt to 28 feet
bgs and grey clay to 35 feet bgs, which may be indicative of the Yorktown Formation. Monitoring well
construction details are summarized in Table 2. The location of monitoring wells MW-5 and DW-1 are
shown on Figure 2. Field notes are included in Appendix A. Site photographs are included in Appendix
B. Boring logs and well construction records are included in Appendix C.

4.2 GROUNDWATER LEVELS

On March 27, 2023, ATC mobilized to the site to sample all the monitoring wells. Groundwater level
measurements were collected from wells MW-1, MW-2, MW-3, MW-4, MW-5, DW-1, and RW-1. LNAPL
was not observed in the gauged wells. Depth to groundwater measurements ranged from 4.62 feet bgs in
MW-2 to 9.17 feet bgs in MW-5. ATC surveyed the elevation of the top of the well casing (TOC) for each
newly installed monitoring well (MW-5 and DW-1). An auto-level was used to conduct the survey, and the
TOC elevation for existing monitoring well MW-1 was used as a datum for the elevation survey. Monitoring
well construction details and groundwater elevation data are summarized in Table 2. A groundwater
elevation contour map generated using the March 2023 groundwater elevation data is included as Figure
4. This figure indicates that the direction of groundwater flow at the site is to the south-southwest. Field
notes from the sampling event are included in Appendix A. Photographs of the monitoring well locations
are included in Appendix B.

Hobgood Service Center
May 1, 2023
Page 6 of 6

ATC Project No. SLC0549903 NCDEQ State Lead Program
4.3 GROUNDWATER QUALITY

On March 27, 2023, groundwater samples were collected from monitoring wells MW-1, MW-2, MW-3, MW-
4, MW-5, DW-1, and RW-1. Samples were collected in laboratory-approved containers, packed in ice and
delivered under chain of custody protocol to Pace Analytical in Mount Juliet, Tennessee for analyses.
Groundwater samples were analyzed for volatile organic compounds by Standard Method 6200B.

The laboratory analytical results exhibited concentrations of benzene, toluene, ethylbenzene, total xylenes,
p-isopropyltoluene, n-propylbenzene, styrene, 1,2,4-trimethylbenzene, and 1,3,5-trimethylbenzene
exceeding the 2L Standards in well MW-1. Benzene, toluene, ethylbenzene, total xylenes, 1,2-
dibromoethane, naphthalene, n-propylbenzene, styrene, and 1,2,4-trimethylbenzene were detected
exceeding the 2L Standards in well MW-5. No compounds were detected above the respective GCLs. No
compounds were detected above 2L Standards in wells DW-1 and RW-1 and no compounds were detected
in MW-2, MW-3, and MW-4. Measured field parameters are summarized in Table 3. A summary of the
laboratory analytical results from the March 2023 event are included in Table 4. Historical groundwater
analytical results are included as Table 5. A benzene isoconcentration contour map and a contaminants of
concern map depicting concentrations exceeding applicable 2L Standards are included as Figure 5 and
Figure 6, respectively. The laboratory analytical report and chain-of-custody forms are included in
Appendix D.

As part of ATC’s quality assurance and quality control (QA and QC) measures, a data review of the
laboratory report was conducted. During the review, it was concluded that samples were received by the
laboratory in acceptable condition and properly preserved. The samples were analyzed within the correct
holding times. A field blank sample was also analyzed for the site, which identified acetone and methylene
chloride concentrations above the method detection limit and below the reporting limit. Methylene chloride
was not found in any of the samples. Acetone was detected in MW-4 and DW-1; however, this compound
is a common laboratory contaminant and is not believed to be indicative of ATC field procedures. The chain
of custody was properly completed by all parties. The laboratory QC report shows an internal blank was
analyzed for each method that was used for the original samples. The laboratory fortified blank and
laboratory control sample data results were also provided for each analytical method. Refer to the laboratory
report in Appendix D for details regarding QA results for the laboratory samples and any noted exceptions.
Overall, ATC concludes that the laboratory results are usable and any exceptions do not significantly impact
the conclusions presented in this report.

5.0 CONCLUSIONS AND RECOMMENDATIONS

On behalf of the Trust Fund Branch of the UST Section, ATC has completed a Groundwater Monitoring
Report documenting the March 2023 monitoring well installation and groundwater sampling activities at the
Hobgood Service Center site located at 219 Commerce Street in Hobgood, Halifax County, North Carolina.

On March 20 and 21, 2023, ATC supervised the installation of one Type II monitoring well MW-5 and one
Type III monitoring well DW-1. ATC also performed a comprehensive groundwater sampling event at the
site, which included the sampling of all existing monitoring wells. LNAPL was not detected. The laboratory
analytical results identified contaminant concentrations exceeding 2L Standards in monitoring wells MW-1
and MW-5. No compounds were detected above the respective GCLs. No compounds exceeding the
corresponding 2L Standards were identified in the remaining sampled wells. Based on the groundwater
analytical results, groundwater impacts are adequately delineated in the vertical direction; however, the
horizontal extent of the groundwater impacts has not been successfully delineated to the west and
southwest.

ATC recommends installing two additional Type II wells to the south and west of MW-5 to delineate the
horizontal extent of the groundwater contamination, as well as continuing groundwater monitoring at the
site of select wells.
Hobgood Service Center

ATC Project No. SLC0549903 NCDEQ State Lead Program
TABLES
TABLE 1
WATER SUPPLY WELL INFORMATION

HOBGOOD SERVICE CENTER
219 COMMERCE STREET
HOBGOOD, HALIFAX COUNTY, NORTH CAROLINA
INCIDENT #5499
Water Supply Well Property Owner(s)Property Address Owner Address Distance from Source
(feet)
Connected to Municipal
Water Usage
WSW-1 Town of Hobgood West Avenue and 2nd
Street
West Avenue and 2nd
Street
Hobgood, NC 27843
707 Not Applicable Town Water Supply Well
WSW-2 Town of Hobgood 5th Street P.O. Box 217
Hobgood, NC 27843 815 Not Applicable Town Water Supply Well
WSW-3 Robert Bryant 105 S. Poplar Street P.O. Box 64
Hobgood, NC 27843 820 Yes Irrigation
WSW-4 Billie and James Bryant 307 S. Poplar Street 24146 Highway 125
Scotland Neck, NC 27874 1,030 Yes Inactive
WSW-5 Andrew Mulder 302 S. Poplar Street 302 S. Poplar Street
Hobgood, NC 27843 825 Yes Unknown
WSW-6 Larry and Jodie Braddy 101 N. Pine Street 101 N. Pine Street
Hobgood, NC 27843 350 Yes Inactive
WSW-7 Larry and Jodie Braddy 101 N. Pine Street 101 N. Pine Street
Hobgood, NC 27843 380 Yes
Currently inactive,
eventually plans to use for
irrigation
Notes:
1. Only water supply wells located within 1,000 feet of the site are included.
2. Ownership information verified using Halifax County Geographic Information System website, updated April 7, 2023.
Page 1 of 1
TABLE 2
WELL CONSTRUCTION DETAILS AND GROUNDWATER ELEVATION DATA

HOBGOOD SERVICE CENTER
219 COMMERCE STREET
HOBGOOD, HALIFAX COUNTY, NORTH CAROLINA
INCIDENT #5499
Monitoring
Well Date Installed Well Diameter
(inches)
Total Depth
(feet bgs)
Screen Interval
(feet bgs)
Top of Casing
(feet bgs)Date Measured
Depth to Free
Product
(feet bgs)
Depth to
Groundwater
(feet bgs)
Free Product
Thickness
(feet bgs)
Groundwater
Elevation
(feet bgs)
8/12/2004 ND 8.90 ND NS
7/9/2014 8.78 9.02 0.24 NS
10/2/15 (Pre-AFVR)10.60 10.72 0.12 NS
10/2/15 (Post-AFVR)ND 13.20 ND NS
11/3/2015 5.32 5.37 0.05 94.67
5/12/16 (Pre-AFVR)8.31 8.81 0.50 91.62
5/12/16 (Post-AFVR)ND 8.86 ND 91.14
10/20/16 (Pre-AFVR)ND 8.39 ND 91.61
4/13/2017 ND 9.60 ND 90.40
6/28/2018 ND 10.58 ND 89.42
2/4/2019 ND 8.36 ND 91.64
3/4/2019 ND 6.34 ND 93.66
4/4/2019 ND 9.42 ND 90.58
10/10/2019 ND 10.81 ND 89.19
3/23/2020 ND 9.11 ND 90.89
3/2/2021 ND 6.88 ND 93.12
3/27/2023 ND 8.76 ND 91.24
11/3/2015 ND 9.94 ND 91.00
4/13/2017 ND 10.23 ND 90.71
6/28/2018 ND 10.85 ND 90.09
4/4/2019 ND 10.09 ND 90.85
10/10/2019 ND 11.59 ND 89.35
3/23/2020 ND 6.22 ND 94.72
3/2/2021 ND 3.21 ND 97.73
3/27/2023 ND 4.62 ND 96.32
11/3/2015 ND 9.92 ND 90.16
4/13/2017 ND 9.18 ND 90.90
6/28/2018 ND 9.83 ND 90.25
4/4/2019 ND 9.10 ND 90.98
10/10/2019 ND 10.53 ND 89.55
3/23/2020 ND 8.83 ND 91.25
3/2/2021 ND 2.60 ND 97.48
3/27/2023 ND 9.02 ND 91.06
5/12/16 ND 8.31 ND 92.33
4/13/2017 ND 9.29 ND 91.35
6/28/2018 ND 9.82 ND 90.82
4/4/2019 ND 9.22 ND 91.42
10/10/2019 ND 10.48 ND 90.16
3/23/2020 ND 8.90 ND 91.74
3/2/2021 ND 3.62 ND 97.02
3/27/2023 ND 8.98 ND 91.66
MW-5 3/20-21/2023 2 15 5-15 99.01 3/27/2023 ND 9.17 ND 89.84
DW-1 3/21/2023 2 35 30-35 99.92 3/27/2023 ND 8.90 ND 90.11
14.13 5/11/2012 ND 5.91 ND NS
5/11/2016 ND 7.37 ND NS
4/13/2017 ND 8.10 ND NS
6/28/2018 ND 8.81 ND NS
4/4/2019 ND 8.13 ND NS
10/10/2019 ND 10.00 ND NS
3/23/2020 ND 8.00 ND NS
3/2/2021 ND 4.02 ND NS
3/27/2023 ND 7.77 ND NS
Notes:
1. bgs = Below Ground Surface.
2. ND = Not Detected.
3. NS = Not Surveyed.
4. Depth to groundwater measured from top of casing.
RW-1 June 1990
NS
15 5-15 100.08
100.94
MW-1 8/12/2004 2 14 4-14
2
12 15.59 Unknown NS
100.645-15152
MW-2
5/11/2016MW-4
MW-3 9/25/2015
100.00
5-151529/25/2015
Page 1 of 1
TABLE 3
FIELD PARAMETERS
HOBGOOD SERVICE CENTER
219 COMMERCE STREET
HOBGOOD, HALIFAX COUNTY, NORTH CAROLINA
INCIDENT #5499
6/28/2018 NR 1.03 NR 35.0 4.71 46.5
10/10/2019 21.1 1.19 142.0 130.5 9.49 -147.2
3/27/2023
6/28/2018 NR 2.34 NR 31.8 4.20 257.3
10/10/2019
3/27/2023 17.3 6.89 24.3 20.7 4.39 224.0
6/28/2018 NR 1.21 NR 46.0 4.23 244.7
10/10/2019 20.8 1.82 51.7 42.6 9.54 -133.7
3/27/2023 17.2 3.30 53.4 45.5 4.53 192.6
6/28/2018 NR 1.30 NR 91.2 4.55 214.1
10/10/2019 21.0 1.63 63.8 58.9 9.72 -125.6
3/27/2023 17.3 3.38 99.4 84.9 4.75 146.8
MW-5 3/27/2023 19.2 2.31 115.4 102.6 4.98 123.4
DW-1 3/27/2023 19.2 1.96 473.4 420.8 10.43 58.1
6/28/2018 NR 2.17 NR 35.0 4.63 244.9
10/10/2019 23.6 3.46 42.0 40.9 8.21 -107.5
3/27/2023 16.80 3.68 38.8 32.8 5.67 229.4
Notes:
1. mg/L = Milligrams per Liter.
2. °C = Degrees Celcius.
3. µS/cm = MicroSiemens per Centimeter.
4. mV = Millivolts.
5. SU = Standard Units.
6. NM = Not measured.
7. NR = Not recorded.
RW-1
MW-4
MW-3
MW-2 Field parameters not collected - Not enough water in well
pH
(SU)
Oxygen
Reduction
Potential (mV)
WELL I.D.DATE
SAMPLED
Temperature
(°C)
Dissolved
Oxygen (mg/L)
Specific
Conductivity
(µS/cm)
Conductivity
(µS/cm)
MW-1
Field parameters not collected - Strong petrol odor and sheen present
Page 1 of 1
TABLE 4
CURRENT GROUNDWATER ANALYTICAL DATA

HOBGOOD SERVICE CENTER
219 COMMERCE STREET
HOBGOOD, HALIFAX COUNTY, NORTH CAROLINA
INCIDENT #5499
Benzene Toluene Ethylbenzene Total Xylenes n-Butylbenzene sec-Butylbenzene EDB Isopropylbenzene p-Isopropyltoluene 4-Methyl-2-Pentanone (MIBK) Naphthalene n-Propylbenzene Styrene 1,2,4-Trimethylbenzene 1,3,5-Trimethylbenzene AcetoneMW-1 3/27/2023 1,170 10,200 1,110 9,490 <500 <500 <500 65.3 J 82.7 J <5,000 <2,500 148 J 149 J 2,380 706 <25,000
MW-2 3/27/2023 <1.00 <1.00 <1.00 <2.00 <1.00 <1.00 <1.00 <1.00 <1.00 <10.0 <5.00 <1.00 <1.00 <1.00 <1.00 <50.0
MW-3 3/27/2023 <1.00 <1.00 <1.00 <2.00 <1.00 <1.00 <1.00 <1.00 <1.00 <10.0 <5.00 <1.00 <1.00 <1.00 <1.00 <50.0
MW-4 3/27/2023 <1.00 <1.00 <1.00 <2.00 <1.00 <1.00 <1.00 <1.00 <1.00 <10.0 <5.00 <1.00 <1.00 <1.00 <1.00 17.9 J
MW-5 3/27/2023 1,210 3,890 833 3,800 22.0 13.8 16.3 51.5 4.98 J <100 281 149 150 966 250 <500
DW-1 3/27/2023 0.173 J 15.0 31.0 146.2 <1.00 <1.00 <1.00 1.78 0.363 J 0.761 J 4.81 J 3.75 3.76 30.1 7.61 20.5 J
RW-1 3/27/2023 <1.00 <1.00 0.585 J 2.073 J 2.15 0.939 J <1.00 0.298 J 0.431 J <10.0 <5.00 1.41 1.42 4.41 1.67 <50.0
1 600 600 500 70 70 0.02 70 25 100 6 70 70 400 400 6,000
5,000 260,000 84,500 85,500 6,900 8,500 50 30,500 11,700 100,000 6,000 30,000 70,000 28,500 24,100 6,000,000
Notes:
1. "<" or ND = Not detected at or above the laboratory reporting limit.
2. Concentrations are reported in micrograms per liter (ug/l) = parts per billion.
3. GCL = Gross Contaminant Level established by NCDEQ.
4. Concentrations in bold print equal or exceed the NCDEQ 15A 2L NCAC Groundwater Standard (2L Standard).
5. Concentrations in italic font equal or exceed the corresponding Gross Contamination Limit (GCL).
6. EDB = Ethylene Dibromide (1,2-Dibromoethane).
7. J = The identification of the analyte is acceptable; the reported value is an estimate.
GCL
2L GW Standard
Monitoring
Well Date
Method 6200B
Page 1 of 1
TABLE 5
HISTORICAL GROUNDWATER ANALYTICAL DATA

HOBGOOD SERVICE CENTER
219 COMMERCE STREET
HOBGOOD, HALIFAX COUNTY, NORTH CAROLINA
INCIDENT #5499
Benzene Toluene Ethylbenzene Total Xylenes MTBE Isopropylbenzene n-Propylbenzene Naphthalene 1,2,4-Trimethylbenzene 1,3,5-Trimethylbenzene n-Butylbenzene sec-Butylbenzene p-Isopropyltoluene EDB Lead Acetone Methylene Chloride Chloromethane Styrene C5-C8 Aliphatics C9-C18 Aliphatics C19-C36 Aliphatics C9-C22 Aromatics8/12/2004 3,800 23,000 1,800 8,800 <50 98 280 540 1,900 520 NR NR NR 26 37 NR --NR NR 49,000 16,000 NA 7,900
7/9/2014
11/3/2015
4/13/2017 3,400 17,000 1,400 10,800 <200 100J 220 780 2,600 730 88 <200 <200 <200 NA <20000 --<240 <200 NA NA NA NA
6/28/2018 3,700 18,000 1,600 12,200 32 J 110 250 360J 3,000 910 120 <100 <100 32 J NA <10000 --<120 <100 NA NA NA NA
3/4/2019*1,000 6,800 940 6,000 <50 64 150 460 1,900 530 36J 21J <50 <50 NA 1200J --<60 16J NA NA NA NA
4/4/2019*1,190 5,450 833 5,430 <2,500 <50 117 267 1,550 442 <50 <50 <50 <50 NA <1,000 80.2 <50 <50 NA NA NA NA
10/10/2019*1,330 11,900 1,370 8,360 <50 75.7 187 364 2,170 553 <50 <50 <50 <50 NA <1,000 <50 <50 <50 NA NA NA NA
3/23/2020*4,910 13,200 2,730 16,200 <100 152 370 670 3,880 1,110 <100 <100 <100 <100 NA <2000 <100 <100 <100 NA NA NA NA
3/2/2021*2,460 17,900 2,080 9,930 <50.0 112 325 386 2,470 721 35.1 J <50.0 81.5 26.4 J NA <2,500 <250 <125 <50.0 NA NA NA NA
3/27/2023*1,170 10,200 1,110 9,490 <500 65.3 J 148 J <2,500 2,380 706 <500 <500 82.7 J <500 NA <25,000 <2,500 <1,250 <500 NA NA NA NA
11/3/2015 <0.079 <0.1 <0.13 <0.25 <0.09 <0.12 <0.11 <0.12 <0.18 <0.1 <0.1 <0.11 <0.12 <0.089 NA <50 --<0.32 <0.50 NA NA NA NA
4/13/2017 <0.5 <0.5 <0.5 <1 <0.5 <0.5 <0.5 <1 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 NA <50 --<0.6 <0.50 NA NA NA NA
6/28/2018 0.34J 5.5 1.7 11.9 <0.50 0.45J 0.99 1.3J 8.9 3.1 0.99 0.25J 0.15J <0.50 NA <50 --0.56J <0.50 NA NA NA NA
4/4/2019 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NA <10 <0.50 <0.50 <0.50 NA NA NA NA
10/10/2019 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NA <10 <0.50 <0.50 <0.50 NA NA NA NA
3/23/2020 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NA <10 <0.50 <0.50 <0.50 NA NA NA NA
3/27/2023 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <5.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 NA <50.0 <5.00 <2.50 <1.00 NA NA NA NA
11/3/2015 <0.079 <0.1 <0.13 <0.25 <0.09 <0.12 <0.11 <0.12 <0.18 <0.1 <0.1 <0.11 <0.12 <0.089 NA <50 --0.33J <0.50 NA NA NA NA
4/13/2017 <0.5 <0.5 <0.5 <1 <0.5 <0.5 <0.5 <1 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 NA <50 --<0.6 <0.50 NA NA NA NA
6/28/2018 <0.50 <0.50 <0.50 <1.50 <0.50 <0.50 <0.50 <2.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NA <50 --0.67 <0.50 NA NA NA NA
4/4/2019 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NA <10 <0.50 <0.50 <0.50 NA NA NA NA
10/10/2019 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NA <10 <0.50 <0.50 <0.50 NA NA NA NA
3/23/2020 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NA <10 <0.50 <0.50 <0.50 NA NA NA NA
3/27/2023 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <5.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 NA <50.0 <5.00 <2.50 <1.00 NA NA NA NA
5/12/2016 <0.12 <0.17 <0.13 <0.25 <0.09 <0.12 <0.13 <0.12 <0.18 <0.13 <0.15 <0.13 <0.15 <0.12 NA <50 --<0.32 <0.50 NA NA NA NA
4/13/2017 <0.5 <0.5 <0.5 <1 <0.5 <0.5 <0.5 <1 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 NA <50 --<0.6 <0.50 NA NA NA NA
6/28/2018 <0.50 <0.50 <0.50 <1.50 <0.50 <0.50 <0.50 <2.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NA <50 --<0.60 <0.50 NA NA NA NA
4/4/2019 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NA <10 <0.50 <0.50 <0.50 NA NA NA NA
10/10/2019 <0.50 1.0 <0.50 0.87 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NA <10 <0.50 <0.50 <0.50 NA NA NA NA
3/23/2020 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NA <10 <0.50 <0.50 <0.50 NA NA NA NA
3/27/2023 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <5.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 NA 17.9J <5.00 <2.50 <1.00 NA NA NA NA
MW-5 3/27/2023 1,210 3,890 833 3,800 <10.0 51.5 149 281 966 250 22.0 13.8 4.98 J 16.3 NA <500 <50.0 <25.0 11.3 NA NA NA NA
DW-1 3/27/2023 0.173 J 15.0 31.0 146 <1.00 1.78 3.75 4.81 J 30.1 7.61 <1.00 <1.00 0.363 J <1.00 NA 20.5 J <5.00 <2.50 <1.00 NA NA NA NA
4/13/2017 <0.5 <0.5 0.16J 0.58J <0.5 <0.5 0.39J <1 1.7 0.61 0.59J 0.13J <0.5 <0.5 NA <50 --<0.6 <0.50 NA NA NA NA
6/28/2018 <0.50 <0.50 <0.50 <1.50 <0.50 <0.50 <0.50 <2.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NA <50 --<0.60 <0.50 NA NA NA NA
4/4/2019 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NA <10 <0.50 <0.50 <0.50 NA NA NA NA
10/10/2019 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NA <10 <0.50 <0.50 <0.50 NA NA NA NA
3/23/2020 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NA <10 <0.50 <0.50 <0.50 NA NA NA NA
3/27/2023 <1.00 <1.00 0.585 J 2.073 J <1.00 0.298 J 1.41 <5.00 4.41 1.67 2.15 0.939 J 0.431 J <1.00 NA <50.0 <5.00 <2.50 <1.00 NA NA NA NA
1 600 600 500 20 70 70 6 400 400 70 70 25 0.02 15 6,000 400 3 70 400 700 10,000 200
5,000 260,000 80,000 50,000 20,000 30,500 26,100 6,000 28,500 24,100 5,900 8,800 11,700 50 15,000 6,000,000 400,000 3,000 70,000 NE NE NE NE
Notes:
1. "<" or "ND" = Not detected at or above the laboratory detection limit.
2. Concentrations are reported in micrograms per liter (ug/l) = parts per billion (ppb).
3. GCL = Gross Contaminant Level established by NCDEQ.
4. Concentrations in bold equal or exceed the corresponding NCDEQ Groundwater Quality 2L Standard (2L Standard).
5. Concentrations in italic font equal or exceed the corresponding Gross Contamination Limit (GCL).
6. MTBE = Methyl Tertiary Butyl Ether.
7. EDB = Ethylene Dibromide (1,2-Dibromoethane).
8. NR = Not Reported.
9. NA = Not Analyzed.
10. NE = Not Established
11. LNAPL = Light Non-Aqueous Phase Liquid.
12. J = The identification of the analyte is acceptable; the reported value is an estimate.
MW-1
NOT SAMPLED DUE TO PRESENCE OF LNAPL (THICKNESS OF 0.24 FEET).
NOT SAMPLED DUE TO PRESENCE OF LNAPL (THICKNESS OF 0.05 FEET).
Monitoring
Well Date
Method 6230D or 6200B MADEP VPH
MW-2
MW-3
MW-4
RW-1
2L GW Standard
GCL
Page 1 of 1
Hobgood Service Center

ATC Project No. SLC0549903 NCDEQ State Lead Program
FIGURES
VICINITY MAP
1"= 2,000'
1
Project Number:
Date:Scale:
Drawing File:
Figure:
App'd By:
Drn. By:
Ckd. By:
N
LATITUDE: N 41° 57' 45.64"
LONGITUDE: W 71° 29' 43.83"
USGS 7.5-MINUTE TOPOGRAPHIC MAP; NORTH SMITHFIELD, RI QUADRANGLE 2000; SCALE 1:24,000
H:\2023\1 OTHER OFFICES\NORTH CAROLINA\NCDEQ-STATE LEAD\HOBGOOD SERVICE CENTER\SLC0549903-VIC.DWG, FIG104/13/2023
SEE LOWER LEFT
HOBGOOD SERVICE CENTER - INCIDENT #5499
219 WEST COMMERCE STREET
HOBGOOD, NORTH CAROLINA
SLC0549903 BM
NK
MW-5MW-4MW-1RW-1MW-2MW-3SOUTH PINE
S
T
R
E
E
T
WEST COMMERCE STREETWW
W
W
W
W
W
W
W
W
W
W
W
W
W
W
WWWWWWW
WP PPPPOHU OHU OHU OHU OHU OHU
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OHUOHUOHUOHUOHUOHUOHUOHUOHU
OHU
OHU
OHU
OHU
OHU
OHU
OHU
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OHUOHUOHUOHUOHUOHUOHUOHUOHUDW-1FORMER HOBGOODSERVICE CENTERGRASSGRASSCOMMERCIALSCALE: 1" = 40'010203040NFORMER ASTCONTAINMENTFORMERDISPENSERFORMERSEPTICUNITED STATESPOSTAL SERVICERESIDENTIALFORMER USTLOCATIONSLEGEND:SITE PROPERTY LINENOTE: ALL LOCATIONS ARE APPROXIMATEPARCEL LINEMW-1MONITORING WELLWell IdentificationDW-1TYPE III MONITORING WELLWell IdentificationRW-1RECOVERY WELLWell IdentificationOHEOVERHEAD ELECTRICALUTILITY POLEPFORMERFUEL ISLANDPPPPO
H
U
O
H
U
O
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OHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUWWWATER LINECOMMERCIALCOMMERCIALOHUOHUOHUOHUOHUOHUOHUFigure:Drawing File:
Project Number:
Ckd. By:
Drn. By:
App'd By:
Ckd. Date:Scale:Date:H:\2023\1 OTHER OFFICES\NORTH CAROLINA\NCDEQ-STATE LEAD\HOBGOOD SERVICE CENTER\SLC0549903-SITE.DWG, FIG2
SITE MAP04/26/2023SEE LOWER LEFTHOBGOOD SERVICE CENTER - INCIDENT #5499
219 WEST COMMERCE STREET
HOBGOOD, NORTH CAROLINA
SLC0549903AS SHOWNBM
NK2NOTES:
1.Features shown are not an authoritative location, nor are they presented
to a stated accuracy.
COORDINATE SYSTEM:
NAD 1983 NORTH CAROLINA STATE PLANE FIPS 3200, US SURVEY FEET
SO
U
T
H

P
I
N
E

S
T
R
E
E
T
WEST COMMERCE STREETSO
U
T
H

P
O
P
L
A
R

S
T
R
E
E
TWEST 7TH STREETSO
U
T
H

B
A
Y

S
T
R
E
E
T
NO
R
T
H

B
E
E
C
H

S
T
R
E
E
T LEGEND:SITE PROPERTY LINENOTE: ALL LOCATIONS ARE APPROXIMATEPARCEL LINETOWN OF HOBGOOD WATER SUPPLY WELLWell IdentificationINACTIVE WATER SUPPLY WELLWell IdentificationWSW-2WSW-4EPHEMERAL STREAMWEST 2ND STREETHIGHWAY 125WSW-1WSW-7WSW-6WSW-5WSW-2WSW-3WSW-4WEST 5TH STREET300200100SCALE: 1" = 300'0N1500 FT.RADIUS1000 FT.RADIUS500 FT.RADIUSIRRIGATION WATER SUPPLY WELLWell IdentificationWSW-3WATER SUPPLY WELL WITH UNKNOWN USE/CONNECTED TO MUNICIPAL WATERWell IdentificationWSW-5WETLANDSITEFigure:Drawing File:
Project Number:
Ckd. By:
Drn. By:
App'd By:
Ckd. Date:Scale:Date:H:\2023\1 OTHER OFFICES\NORTH CAROLINA\NCDEQ-STATE LEAD\HOBGOOD SERVICE CENTER\SLC0549903-WSW.DWG, FIG3
POTENTIAL RECEPTOR MAP04/27/2023SEE LOWER LEFTHOBGOOD SERVICE CENTER - INCIDENT #5499
219 WEST COMMERCE STREET
HOBGOOD, NORTH CAROLINA
SLC0549903AS SHOWNBM
NK3NOTES:
1.Features shown are not an authoritative location, nor are they presented
to a stated accuracy.
COORDINATE SYSTEM:
NAD 1983 NORTH CAROLINA STATE PLANE FIPS 3200, US SURVEY FEET
MW-5MW-4MW-1RW-1MW-3SOUTH PINE STREET
WEST COMMERCE STREETWW
W
W
W
W
W
W
W
W
W
W
W
W
W
W
WWWWWWW
WP PPPPOHU OHU OHU OHU OHU OHU
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OHUOHUOHUOHUOHUOHUOHUOHUOHU
OHU
OHU
OHU
OHU
OHU
OHU
OHU
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OHUOHUOHUOHUOHUOHUOHUOHUOHU*DW-1FORMER HOBGOODSERVICE CENTERGRASSGRASSCOMMERCIALSCALE: 1" = 40'010203040NFORMER ASTCONTAINMENTFORMERDISPENSERFORMERSEPTICUNITED STATESPOSTAL SERVICERESIDENTIALFORMER USTLOCATIONSFORMERFUEL ISLANDPPPPO
H
U
O
H
U
O
H
U
OHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUCOMMERCIALCOMMERCIALOHUOHUOHUOHUOHUOHUOHUGROUNDWATER ELEVATION CONTOUR(DASHED WHERE INFERRED) (ft)LEGEND:SITE PROPERTY LINENOTE: ALL LOCATIONS ARE APPROXIMATEPARCEL LINEDW-1TYPE III MONITORING WELLWell IdentificationRW-1RECOVERY WELLWell IdentificationOHEOVERHEAD ELECTRICALUTILITY POLEPWWWATER LINE90.0GROUNDWATER FLOW DIRECTIONMW-296.32MONITORING WELLWell IdentificationRelative Groundwater Elevation (ft)89.8491.24NM91.0691.6690.092.094.096.0MW-296.32Figure:Drawing File:
Project Number:
Ckd. By:
Drn. By:
App'd By:
Ckd. Date:Scale:Date:H:\2023\1 OTHER OFFICES\NORTH CAROLINA\NCDEQ-STATE LEAD\HOBGOOD SERVICE CENTER\SLC0549903-POT.DWG, FIG4
GROUNDWATER ELEVATION CONTOUR MAP04/26/2023SEE LOWER LEFTHOBGOOD SERVICE CENTER - INCIDENT #5499
219 WEST COMMERCE STREET
HOBGOOD, NORTH CAROLINA
SLC0549903AS SHOWNBM
NK4NOTES:
1.Features shown are not an authoritative location, nor are they presented
to a stated accuracy.
2.Groundwater elevation measured on March 27, 2023.
3.* = DW-1 not used to construct contours.
4.NM = not measured.
COORDINATE SYSTEM:
NAD 1983 NORTH CAROLINA STATE PLANE FIPS 3200, US SURVEY FEET
MW-5MW-4RW-1*MW-3SOUTH PINE
S
T
R
E
E
T
WEST COMMERCE STREETWW
W
W
W
W
W
W
W
W
W
W
W
W
W
W
WWWWWWW
WP PPPPOHU OHU OHU OHU OHU OHU
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OHUOHUOHUOHUOHUOHUOHUOHUOHU
OHU
OHU
OHU
OHU
OHU
OHU
OHU
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OHUOHUOHUOHUOHUOHUOHUOHUOHUFORMER HOBGOODSERVICE CENTERGRASSGRASSCOMMERCIALSCALE: 1" = 40'010203040NFORMER ASTCONTAINMENTFORMERDISPENSERFORMERSEPTICUNITED STATESPOSTAL SERVICERESIDENTIALFORMER USTLOCATIONSFORMERFUEL ISLANDPPPPO
H
U
O
H
U
O
H
U
OHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUCOMMERCIALCOMMERCIALOHUOHUOHUOHUOHUOHUOHU1,210BENZENE ISOCONCENTRATION CONTOUR(DASHED WHERE INFERRED) (ft)LEGEND:SITE PROPERTY LINENOTE: ALL LOCATIONS ARE APPROXIMATEPARCEL LINEDW-1TYPE III MONITORING WELLWell IdentificationRW-1RECOVERY WELLWell IdentificationOHEOVERHEAD ELECTRICALUTILITY POLEPWWWATER LINE100GROUNDWATER FLOW DIRECTIONMW-51,210MONITORING WELLWell IdentificationBenzene Concentration (µg/L)<1.00*<1.00<1.00DW-1*0.173J*MW-2<1.00MW-11,1701101001,000Figure:Drawing File:
Project Number:
Ckd. By:
Drn. By:
App'd By:
Ckd. Date:Scale:Date:H:\2023\1 OTHER OFFICES\NORTH CAROLINA\NCDEQ-STATE LEAD\HOBGOOD SERVICE CENTER\SLC0549903-BENZ.DWG, FIG5
DISSOLVED BENZENE
ISOCONCENTRATION MAP04/26/2023SEE LOWER LEFTHOBGOOD SERVICE CENTER - INCIDENT #5499
219 WEST COMMERCE STREET
HOBGOOD, NORTH CAROLINA
SLC0549903AS SHOWNBM
NK5NOTES:
1.Features shown are not an authoritative location, nor are they presented
to a stated accuracy.
2.Groundwater sampled on March 27, 2023.
3.Groundwater results are measured in micrograms per liter (µg/L).
4.* = RW-1 and DW-1 not used to construct contours.
5.< = Not Detected.
COORDINATE SYSTEM:
NAD 1983 NORTH CAROLINA STATE PLANE FIPS 3200, US SURVEY FEET
MW-5MW-4MW-1RW-1MW-2MW-3SOUTH PINE
S
T
R
E
E
T
WEST COMMERCE STREETWW
W
W
W
W
W
W
W
W
W
W
W
W
W
W
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U
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U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OHUOHUOHUOHUOHUOHUOHUOHUOHU
OHU
OHU
OHU
OHU
OHU
OHU
OHU
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OHUOHUOHUOHUOHUOHUOHUOHUOHUDW-1FORMER HOBGOODSERVICE CENTERGRASSGRASSCOMMERCIALSCALE: 1" = 40'010203040NFORMER ASTCONTAINMENTFORMERDISPENSERFORMERSEPTICUNITED STATESPOSTAL SERVICERESIDENTIALFORMER USTLOCATIONSLEGEND:SITE PROPERTY LINENOTE: ALL LOCATIONS ARE APPROXIMATEPARCEL LINEMW-1MONITORING WELLWell IdentificationDW-1TYPE III MONITORING WELLWell IdentificationRW-1RECOVERY WELLWell IdentificationOHEOVERHEAD ELECTRICALUTILITY POLEPFORMERFUEL ISLANDPPPPO
H
U
O
H
U
O
H
U
OHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUOHUWWWATER LINERESIDENTIALCOMMERCIALCOMMERCIALOHUOHUOHUOHUOHUOHUOHUFigure:Drawing File:
Project Number:
Ckd. By:
Drn. By:
App'd By:
Ckd. Date:Scale:Date:H:\2023\1 OTHER OFFICES\NORTH CAROLINA\NCDEQ-STATE LEAD\HOBGOOD SERVICE CENTER\SLC0549903-COC.DWG, FIG6
ADDITIONAL CONTAMINANTS OF CONCERN MAP04/26/2023SEE LOWER LEFTHOBGOOD SERVICE CENTER - INCIDENT #5499
219 WEST COMMERCE STREET
HOBGOOD, NORTH CAROLINA
SLC0549903AS SHOWNBM
NK6NOTES:
1.Features shown are not an authoritative location, nor are they presented
to a stated accuracy.
2.Only compounds exceeding 2L Standards are shown on figure.
3.All compounds are reported in micrograms per liter (µg/L).
4.J = Estimated value below method reporting limit.
5.EDB = Ethylene Dibromide (1,2-Dibromoethane).
COORDINATE SYSTEM:
NAD 1983 NORTH CAROLINA STATE PLANE FIPS 3200, US SURVEY FEET
Hobgood Service Center

ATC Project No. SLC0549903 NCDEQ State Lead Program
APPENDIX A

FIELD NOTES
Hobgood Service Center

ATC Project No. SLC0549903 NCDEQ State Lead Program
APPENDIX B

SITE PHOTOGRAPHS

Photo 1: A view of the site building facing west.

Photo 2: A view of the installation of deep monitoring well DW-1.

Hobgood Service Center
219 Commerce Street
Hobgood, Halifax County, North Carolina

2725 E. Millbrook Road, Suite 121
Raleigh, North Carolina
[phone] FAX [phone]
Photographs Taken By:
Nicholas Kramer
NCDEQ Incident
#5499 ATC Project No.: SLC0549903

Photo 3: A view of the installation of well MW-5.

Photo 4: A view of monitoring well MW-1 and deep monitoring well DW-1.

Hobgood Service Center
219 Commerce Street
Hobgood, Halifax County, North Carolina

2725 E. Millbrook Road, Suite 121
Raleigh, North Carolina
[phone] FAX [phone]
Photographs Taken By:
Nicholas Kramer / Laura de Sousa
NCDEQ Incident
#5499 ATC Project No.: SLC0549903

Photo 5: A view of monitoring well MW-2.

Photo 6: A view of monitoring well MW-3.

Hobgood Service Center
219 Commerce Street
Hobgood, Halifax County, North Carolina

2725 E. Millbrook Road, Suite 121
Raleigh, North Carolina
[phone] FAX [phone]
Photographs Taken By:
Laura de Sousa
NCDEQ Incident
#5499 ATC Project No.: SLC0549903

Photo 7: A view of monitoring well MW-4.

Photo 8: A view of monitoring well MW-5.

Hobgood Service Center
219 Commerce Street
Hobgood, Halifax County, North Carolina

2725 E. Millbrook Road, Suite 121
Raleigh, North Carolina
[phone] FAX [phone]
Photographs Taken By:
Laura de Sousa
NCDEQ Incident
#5499 ATC Project No.: SLC0549903

Photo 9: A view of recovery well RW-1.

Hobgood Service Center
219 Commerce Street
Hobgood, Halifax County, North Carolina

2725 E. Millbrook Road, Suite 121
Raleigh, North Carolina
[phone] FAX [phone]
Photograph Taken By:
Laura de Sousa
NCDEQ Incident
#5499 ATC Project No.: SLC0549903

Hobgood Service Center

ATC Project No. SLC0549903 NCDEQ State Lead Program
APPENDIX C

BORING LOGS AND WELL CONSTRUCTION RECORDS
04-14-2023 S:\Enviro\NCDENR State Lead Contract\Linda ATC\Farrar's Store\Boring Logs\MW-2.borClient: NCDEQ State Lead Program
ATC Project No. SLC0549903
Hobgood, Halifax County, North Carolina
219 Commerce Street
Hobgood Service Center - Incident #5499
MONITORING WELL: MW-5
(Page 1 of 1)
Date(s) Drilled : 03/20/2023
Drilling Contractor : Geologic Exploration, Inc.
Drilling Method : Hand Auger / HSA
Boring Diameter : 8.25"
Sampling Method : Cuttings
Sampling Interval : Continous
Logged By : Nicholas Kramer
Depth In Feet0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15 USCSML
ML GRAPHICDESCRIPTION
Brown SILT; no odor; moist
Reddish brown clayey SILT; no odor; wet at 8 ft bgs; saturated at 10 ft bgs.
Elev: 99.01
Well: MW-5
Grout
Bentonite
Sand
Cover
Casing
Screen
HSA = Hollow Stem Auger.
bgs = below ground surface.
WELL CONSTRUCTION RECORD (GW-1) For Internal Use Only:
Form GW-1 North Carolina Department of Environmental Quality - Division of Water Resources Revised 6-6-2018
1.Well Contractor Information:
Well Contractor Name
NC Well Contractor Certification Number
Company Name
2.Well Construction Permit #: List all applicable well construction permits (i.e. UIC, County, State, Variance, etc.)
3.Well Use (check well use):
Water Supply Well: □Agricultural □Municipal/Public □Geothermal (Heating/Cooling Supply) □Residential Water Supply (single) □Industrial/Commercial □Residential Water Supply (shared) □Irrigation □Wells > 100,000 GPDNon-Water Supply Well: □Monitoring □Recovery
Injection Well: □Aquifer Recharge □Groundwater Remediation □Aquifer Storage and Recovery □Salinity Barrier □Aquifer Test □Stormwater Drainage □Experimental Technology □Subsidence Control □Geothermal (Closed Loop)□Tracer □Geothermal (Heating/Cooling Return) □Other (explain under #21 Remarks)
4. Date Well(s) Completed: Well ID#
5a. Well Location:
Facility/Owner Name Facility ID# (if applicable)
Physical Address, City, and Zip
County Parcel Identification No. (PIN)
5b. Latitude and longitude in degrees/minutes/seconds or decimal degrees: (if well field, one lat/long is sufficient)
N W
6.Is(are) the well(s): □Permanent or □Temporary
7.Is this a repair to an existing well: □Yes or □No
If this is a repair, fill out known well construction information and explain the nature of the repair under #21 remarks section or on the back of this form.
8. For Geoprobe/DPT or Closed-Loop Geothermal Wells having the same construction, only 1 GW-1 is needed. Indicate TOTAL NUMBER of wellsdrilled:
9. Total well depth below land surface: (ft.) For multiple wells list all depths if different (example- 3@200’ and 2@100′)
10.Static water level below top of casing: (ft.) If water level is above casing, use “+”
11. Borehole diameter: (in.)
12. Well construction method:(i.e. auger, rotary, cable, direct push, etc.)
FOR WATER SUPPLY WELLS ONLY:
13a. Yield (gpm) Method of test:
13b. Disinfection type: Amount:
14. WATER ZONES
FROM TO DESCRIPTION
ft. ft.
ft. ft.
15. OUTER CASING (for multi-cased wells) OR LINER (if applicable)FROM TO DIAMETER THICKNESS MATERIAL ft. ft. in.
16. INNER CASING OR TUBING (geothermal closed-loop)FROM TO DIAMETER THICKNESS MATERIAL
ft. ft. in.
ft. ft. in.
17. SCREENFROM TO DIAMETER SLOT SIZE THICKNESS MATERIAL
ft. ft. in.
ft. ft. in.
18. GROUT
FROM TO MATERIAL EMPLACEMENT METHOD & AMOUNT
ft. ft.
ft. ft.
ft. ft.
19. SAND/GRAVEL PACK (if applicable) FROM TO MATERIAL EMPLACEMENT METHOD
ft. ft.
ft. ft.
20. DRILLING LOG (attach additional sheets if necessary) FROM TO DESCRIPTION (color, hardness, soil/rock type, grain size, etc.)
ft. ft.
ft. ft.
ft. ft.
ft. ft.
ft. ft.
ft. ft.
ft. ft.
21. REMARKS
22.Certification:
Signature of Certified Well Contractor Date
By signing this form, I hereby certify that the well(s) was (were) constructed in accordance with 15A NCAC 02C .0100 or 15A NCAC 02C .0200 Well Construction Standards and that a copy of this record has been provided to the well owner.
23.Site diagram or additional well details:You may use the back of this page to provide additional well construction info (add 'See Over' in Remarks Box). You may also attach additional pages if necessary.
24.SUBMITTAL INSTRUCTIONS
Submit this GW-1 within 30 days of well completion per the following:
24a. For All Wells: Original form to Division of Water Resources (DWR), Information Processing Unit, 1617 MSC, Raleigh, NC 27699-1617
24b. For Injection Wells: Copy to DWR, Underground Injection Control (IUC) Program, 1636 MSC, Raleigh, NC 27699-1636
24c. For Water Supply and Open-Loop Geothermal Return Wells: Copy to the county environmental health department of the county where installed
24d. For Water Wells producing over 100,000 GPD: Copy to DWR, CCPCUA Permit Program, 1611 MSC, Raleigh, NC 27699-1611
04-14-2023 S:\Enviro\NCDENR State Lead Contract\Linda ATC\Farrar's Store\Boring Logs\MW-1D.borClient: NCDEQ State Lead Program
ATC Project No. SLC0549903
Hobgood, Halifax County, North Carolina
219 Commerce Street
Hobgood Service Center - Incident #5499
HSA = Hollow Stem Auger
MONITORING WELL: DW-1
(Page 1 of 1)
Date(s) Drilled : 03/20 - 03/21/2023
Drilling Contractor : Geologic Exploration, Inc.
Drilling Method : Hand Auger / HSA
: Mud Rotary
Boring Diameter : Inner Diameter = 8.25"
: Outer Diameter = 11"
Sampling Method : Cuttings
Sample Inverval : Continuous
Logged By : Nicholas Kramer
Depth in Feet (BGS)0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34 USCSGRAPHICDESCRIPTION
SW
SW
SM
ML
SM
CL
Brown SAND; well sorted; no odor; moist at 3 ft bgs.
Brown SAND with clay fines; well sorted; slight petrlo odor at 5 ft bgs.
Brown SILTY SAND; strong petrol odor; wet at 8 ft bgs; saturated at 10 ft bgs.
Brown SANDY SILT; petrol odor present.
Brown SILTY SAND; petrol odor present.
Grey CLAY.
End of boring.
Elev: 99.92
Well: DW-1
Grout
Bentonite
Filter Sand
OuterCasing
Cover
Inner Casing
Well Screen
WELL CONSTRUCTION RECORD (GW-1) For Internal Use Only:
Form GW-1 North Carolina Department of Environmental Quality - Division of Water Resources Revised 6-6-2018
1.Well Contractor Information:
Well Contractor Name
NC Well Contractor Certification Number
Company Name
2.Well Construction Permit #: List all applicable well construction permits (i.e. UIC, County, State, Variance, etc.)
3.Well Use (check well use):
Water Supply Well: □Agricultural □Municipal/Public □Geothermal (Heating/Cooling Supply) □Residential Water Supply (single) □Industrial/Commercial □Residential Water Supply (shared) □Irrigation □Wells > 100,000 GPDNon-Water Supply Well: □Monitoring □Recovery
Injection Well: □Aquifer Recharge □Groundwater Remediation □Aquifer Storage and Recovery □Salinity Barrier □Aquifer Test □Stormwater Drainage □Experimental Technology □Subsidence Control □Geothermal (Closed Loop)□Tracer □Geothermal (Heating/Cooling Return) □Other (explain under #21 Remarks)
4. Date Well(s) Completed: Well ID#
5a. Well Location:
Facility/Owner Name Facility ID# (if applicable)
Physical Address, City, and Zip
County Parcel Identification No. (PIN)
5b. Latitude and longitude in degrees/minutes/seconds or decimal degrees: (if well field, one lat/long is sufficient)
N W
6.Is(are) the well(s): □Permanent or □Temporary
7.Is this a repair to an existing well: □Yes or □No
If this is a repair, fill out known well construction information and explain the nature of the repair under #21 remarks section or on the back of this form.
8. For Geoprobe/DPT or Closed-Loop Geothermal Wells having the same construction, only 1 GW-1 is needed. Indicate TOTAL NUMBER of wellsdrilled:
9. Total well depth below land surface: (ft.) For multiple wells list all depths if different (example- 3@200’ and 2@100′)
10.Static water level below top of casing: (ft.) If water level is above casing, use “+”
11. Borehole diameter: (in.)
12. Well construction method:(i.e. auger, rotary, cable, direct push, etc.)
FOR WATER SUPPLY WELLS ONLY:
13a. Yield (gpm) Method of test:
13b. Disinfection type: Amount:
14. WATER ZONES
FROM TO DESCRIPTION
ft. ft.
ft. ft.
15. OUTER CASING (for multi-cased wells) OR LINER (if applicable)FROM TO DIAMETER THICKNESS MATERIAL ft. ft. in.
16. INNER CASING OR TUBING (geothermal closed-loop)FROM TO DIAMETER THICKNESS MATERIAL
ft. ft. in.
ft. ft. in.
17. SCREENFROM TO DIAMETER SLOT SIZE THICKNESS MATERIAL
ft. ft. in.
ft. ft. in.
18. GROUT
FROM TO MATERIAL EMPLACEMENT METHOD & AMOUNT
ft. ft.
ft. ft.
ft. ft.
19. SAND/GRAVEL PACK (if applicable) FROM TO MATERIAL EMPLACEMENT METHOD
ft. ft.
ft. ft.
20. DRILLING LOG (attach additional sheets if necessary) FROM TO DESCRIPTION (color, hardness, soil/rock type, grain size, etc.)
ft. ft.
ft. ft.
ft. ft.
ft. ft.
ft. ft.
ft. ft.
ft. ft.
21. REMARKS
22.Certification:
Signature of Certified Well Contractor Date
By signing this form, I hereby certify that the well(s) was (were) constructed in accordance with 15A NCAC 02C .0100 or 15A NCAC 02C .0200 Well Construction Standards and that a copy of this record has been provided to the well owner.
23.Site diagram or additional well details:You may use the back of this page to provide additional well construction info (add 'See Over' in Remarks Box). You may also attach additional pages if necessary.
24.SUBMITTAL INSTRUCTIONS
Submit this GW-1 within 30 days of well completion per the following:
24a. For All Wells: Original form to Division of Water Resources (DWR), Information Processing Unit, 1617 MSC, Raleigh, NC 27699-1617
24b. For Injection Wells: Copy to DWR, Underground Injection Control (IUC) Program, 1636 MSC, Raleigh, NC 27699-1636
24c. For Water Supply and Open-Loop Geothermal Return Wells: Copy to the county environmental health department of the county where installed
24d. For Water Wells producing over 100,000 GPD: Copy to DWR, CCPCUA Permit Program, 1611 MSC, Raleigh, NC 27699-1611
Hobgood Service Center

ATC Project No. SLC0549903 NCDEQ State Lead Program
APPENDIX D

LABORATORY ANALYTICAL RESULTS
ANALYTICAL REPORT
April 06, 2023
ATC Group Services LLC
Sample Delivery Group:L1599585
Samples Received:03/29/2023
Project Number:
Description:Hobgood Service Center
Report To:Ashley Offer
2725 E. Millbrook Road, Ste 121
Raleigh, NC 27604
Entire Report Reviewed By:
April 06, 2023
[Preliminary Report]
Heather J Wagner
Project Manager
Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided, and as the samples are received.
Pace Analytical National
12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 www.pacenational.com
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
ATC Group Services LLC L1599585 04/06/23 15:18 1 of 28
April 06, 2023
Heather J Wagner
Project Manager
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
ATC Group Services LLC L1599585 04/06/23 15:47 1 of 28
TABLE OF CONTENTS
Cp: Cover Page 1
Tc: Table of Contents 2
Ss: Sample Summary 3
Cn: Case Narrative 4
Sr: Sample Results 5
MW-1 L1599585-01 5
MW-2 L1599585-02 7
MW-3 L1599585-03 9
MW-4 L1599585-04 11
MW-5 L1599585-05 13
DMW-1 L1599585-06 15
RW-1 L1599585-07 17
FB-1 L1599585-08 19
Qc: Quality Control Summary 21
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 21
Gl: Glossary of Terms 26
Al: Accreditations & Locations 27
Sc: Sample Chain of Custody 28
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
ATC Group Services LLC L1599585 04/06/23 15:18 2 of 28
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
ATC Group Services LLC L1599585 04/06/23 15:47 2 of 28
SAMPLE SUMMARY
Collected by Collected date/time Received date/time
MW-1 L1599585-01 GW Laura De Sousa 03/27/23 13:40 03/29/23 09:15
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2034400 500 04/02/23 22:22 04/02/23 22:22 MGF Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-2 L1599585-02 GW Laura De Sousa 03/27/23 12:45 03/29/23 09:15
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2034400 1 04/02/23 19:13 04/02/23 19:13 MGF Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-3 L1599585-03 GW Laura De Sousa 03/27/23 12:30 03/29/23 09:15
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2034400 1 04/02/23 19:34 04/02/23 19:34 MGF Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-4 L1599585-04 GW Laura De Sousa 03/27/23 12:15 03/29/23 09:15
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2034400 1 04/02/23 19:55 04/02/23 19:55 MGF Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-5 L1599585-05 GW Laura De Sousa 03/27/23 13:20 03/29/23 09:15
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2034400 10 04/02/23 22:42 04/02/23 22:42 MGF Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2036693 100 04/05/23 23:52 04/05/23 23:52 JAH Mt. Juliet, TN
Collected by Collected date/time Received date/time
DMW-1 L1599585-06 GW Laura De Sousa 03/27/23 13:05 03/29/23 09:15
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2034400 1 04/02/23 20:16 04/02/23 20:16 MGF Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2036693 1 04/05/23 23:31 04/05/23 23:31 JAH Mt. Juliet, TN
Collected by Collected date/time Received date/time
RW-1 L1599585-07 GW Laura De Sousa 03/27/23 14:35 03/29/23 09:15
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2034400 1 04/02/23 20:37 04/02/23 20:37 MGF Mt. Juliet, TN
Collected by Collected date/time Received date/time
FB-1 L1599585-08 GW Laura De Sousa 03/27/23 14:40 03/29/23 09:15
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2034400 1 04/02/23 16:04 04/02/23 16:04 MGF Mt. Juliet, TN
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
ATC Group Services LLC L1599585 04/06/23 15:18 3 of 28
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
ATC Group Services LLC L1599585 04/06/23 15:47 3 of 28
CASE NARRATIVE
All sample aliquots were received at the correct temperature, in the proper containers, with the
appropriate preservatives, and within method specified holding times, unless qualified or notated within
the report. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples
have been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control
are within established criteria except where addressed in this case narrative, a non-conformance form
or properly qualified within the sample results. By my digital signature below, I affirm to the best of my
knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the
quality of the data have been identified by the laboratory, and no information or data have been
knowingly withheld that would affect the quality of the data.
[Preliminary Report]
Heather J Wagner
Project Manager
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
ATC Group Services LLC L1599585 04/06/23 15:18 4 of 28
Heather J Wagner
Project Manager
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
ATC Group Services LLC L1599585 04/06/23 15:47 4 of 28
SAMPLE RESULTS - 01
L1599585
MW-1
Collected date/time: 03/27/23 13:40
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone U 5650 25000 500 04/02/2023 22:22 WG2034400
Acrolein U 1270 25000 500 04/02/2023 22:22 WG2034400
Acrylonitrile U 336 5000 500 04/02/2023 22:22 WG2034400
Benzene 1170 47.1 500 500 04/02/2023 22:22 WG2034400
Bromobenzene U 59.0 500 500 04/02/2023 22:22 WG2034400
Bromodichloromethane U 68.0 500 500 04/02/2023 22:22 WG2034400
Bromoform U 64.5 500 500 04/02/2023 22:22 WG2034400
Bromomethane U C4 303 2500 500 04/02/2023 22:22 WG2034400
n-Butylbenzene U 78.5 500 500 04/02/2023 22:22 WG2034400
sec-Butylbenzene U 62.5 500 500 04/02/2023 22:22 WG2034400
tert-Butylbenzene U 63.5 500 500 04/02/2023 22:22 WG2034400
Carbon tetrachloride U 64.0 500 500 04/02/2023 22:22 WG2034400
Chlorobenzene U 58.0 500 500 04/02/2023 22:22 WG2034400
Chlorodibromomethane U 70.0 500 500 04/02/2023 22:22 WG2034400
Chloroethane U 96.0 2500 500 04/02/2023 22:22 WG2034400
Chloroform U 55.5 2500 500 04/02/2023 22:22 WG2034400
Chloromethane U 480 1250 500 04/02/2023 22:22 WG2034400
2-Chlorotoluene U 53.0 500 500 04/02/2023 22:22 WG2034400
4-Chlorotoluene U 57.0 500 500 04/02/2023 22:22 WG2034400
1,2-Dibromo-3-Chloropropane U J4 138 2500 500 04/02/2023 22:22 WG2034400
1,2-Dibromoethane U 63.0 500 500 04/02/2023 22:22 WG2034400
Dibromomethane U 61.0 500 500 04/02/2023 22:22 WG2034400
1,2-Dichlorobenzene U 53.5 500 500 04/02/2023 22:22 WG2034400
1,3-Dichlorobenzene U 55.0 500 500 04/02/2023 22:22 WG2034400
1,4-Dichlorobenzene U 60.0 500 500 04/02/2023 22:22 WG2034400
Dichlorodifluoromethane U 187 2500 500 04/02/2023 22:22 WG2034400
1,1-Dichloroethane U 50.0 500 500 04/02/2023 22:22 WG2034400
1,2-Dichloroethane U 40.9 500 500 04/02/2023 22:22 WG2034400
1,1-Dichloroethene U 94.0 500 500 04/02/2023 22:22 WG2034400
cis-1,2-Dichloroethene U 63.0 500 500 04/02/2023 22:22 WG2034400
trans-1,2-Dichloroethene U 74.5 500 500 04/02/2023 22:22 WG2034400
1,2-Dichloropropane U 74.5 500 500 04/02/2023 22:22 WG2034400
1,1-Dichloropropene U 71.0 500 500 04/02/2023 22:22 WG2034400
1,3-Dichloropropane U 55.0 500 500 04/02/2023 22:22 WG2034400
2,2-Dichloropropane U 80.5 500 500 04/02/2023 22:22 WG2034400
Di-isopropyl ether U 52.5 500 500 04/02/2023 22:22 WG2034400
Ethylbenzene 1110 68.5 500 500 04/02/2023 22:22 WG2034400
Hexachloro-1,3-butadiene U 169 500 500 04/02/2023 22:22 WG2034400
Isopropylbenzene 65.3 J 52.5 500 500 04/02/2023 22:22 WG2034400
p-Isopropyltoluene 82.7 J 60.0 500 500 04/02/2023 22:22 WG2034400
2-Butanone (MEK)U 595 5000 500 04/02/2023 22:22 WG2034400
Methylene Chloride U 215 2500 500 04/02/2023 22:22 WG2034400
4-Methyl-2-pentanone (MIBK)U 239 5000 500 04/02/2023 22:22 WG2034400
Methyl tert-butyl ether U 50.5 500 500 04/02/2023 22:22 WG2034400
Naphthalene U 500 2500 500 04/02/2023 22:22 WG2034400
n-Propylbenzene 148 J 49.7 500 500 04/02/2023 22:22 WG2034400
Styrene U 59.0 500 500 04/02/2023 22:22 WG2034400
1,1,1,2-Tetrachloroethane U 73.5 500 500 04/02/2023 22:22 WG2034400
1,1,2,2-Tetrachloroethane U 66.5 500 500 04/02/2023 22:22 WG2034400
Tetrachloroethene U 150 500 500 04/02/2023 22:22 WG2034400
Toluene 10200 139 500 500 04/02/2023 22:22 WG2034400
1,2,3-Trichlorobenzene U 115 500 500 04/02/2023 22:22 WG2034400
1,2,4-Trichlorobenzene U 241 500 500 04/02/2023 22:22 WG2034400
1,1,1-Trichloroethane U 74.5 500 500 04/02/2023 22:22 WG2034400
1,1,2-Trichloroethane U 79.0 500 500 04/02/2023 22:22 WG2034400
Trichloroethene U 95.0 500 500 04/02/2023 22:22 WG2034400
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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ATC Group Services LLC L1599585 04/06/23 15:47 5 of 28
SAMPLE RESULTS - 01
L1599585
MW-1
Collected date/time: 03/27/23 13:40
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 80.0 2500 500 04/02/2023 22:22 WG2034400
1,2,3-Trichloropropane U 119 1250 500 04/02/2023 22:22 WG2034400
1,2,4-Trimethylbenzene 2380 161 500 500 04/02/2023 22:22 WG2034400
1,3,5-Trimethylbenzene 706 52.0 500 500 04/02/2023 22:22 WG2034400
Vinyl chloride U 117 500 500 04/02/2023 22:22 WG2034400
o-Xylene 2910 87.0 500 500 04/02/2023 22:22 WG2034400
m&p-Xylenes 6580 215 1000 500 04/02/2023 22:22 WG2034400
(S) Toluene-d8 110 80.0-120 04/02/2023 22:22 WG2034400
(S) 4-Bromofluorobenzene 109 77.0-126 04/02/2023 22:22 WG2034400
(S) 1,2-Dichloroethane-d4 107 70.0-130 04/02/2023 22:22 WG2034400
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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ATC Group Services LLC L1599585 04/06/23 15:47 6 of 28
SAMPLE RESULTS - 02
L1599585
MW-2
Collected date/time: 03/27/23 12:45
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone U 11.3 50.0 1 04/02/2023 19:13 WG2034400
Acrolein U 2.54 50.0 1 04/02/2023 19:13 WG2034400
Acrylonitrile U 0.671 10.0 1 04/02/2023 19:13 WG2034400
Benzene U 0.0941 1.00 1 04/02/2023 19:13 WG2034400
Bromobenzene U 0.118 1.00 1 04/02/2023 19:13 WG2034400
Bromodichloromethane U 0.136 1.00 1 04/02/2023 19:13 WG2034400
Bromoform U 0.129 1.00 1 04/02/2023 19:13 WG2034400
Bromomethane U C4 0.605 5.00 1 04/02/2023 19:13 WG2034400
n-Butylbenzene U 0.157 1.00 1 04/02/2023 19:13 WG2034400
sec-Butylbenzene U 0.125 1.00 1 04/02/2023 19:13 WG2034400
tert-Butylbenzene U 0.127 1.00 1 04/02/2023 19:13 WG2034400
Carbon tetrachloride U 0.128 1.00 1 04/02/2023 19:13 WG2034400
Chlorobenzene U 0.116 1.00 1 04/02/2023 19:13 WG2034400
Chlorodibromomethane U 0.140 1.00 1 04/02/2023 19:13 WG2034400
Chloroethane U 0.192 5.00 1 04/02/2023 19:13 WG2034400
Chloroform U 0.111 5.00 1 04/02/2023 19:13 WG2034400
Chloromethane U 0.960 2.50 1 04/02/2023 19:13 WG2034400
2-Chlorotoluene U 0.106 1.00 1 04/02/2023 19:13 WG2034400
4-Chlorotoluene U 0.114 1.00 1 04/02/2023 19:13 WG2034400
1,2-Dibromo-3-Chloropropane U J4 0.276 5.00 1 04/02/2023 19:13 WG2034400
1,2-Dibromoethane U 0.126 1.00 1 04/02/2023 19:13 WG2034400
Dibromomethane U 0.122 1.00 1 04/02/2023 19:13 WG2034400
1,2-Dichlorobenzene U 0.107 1.00 1 04/02/2023 19:13 WG2034400
1,3-Dichlorobenzene U 0.110 1.00 1 04/02/2023 19:13 WG2034400
1,4-Dichlorobenzene U 0.120 1.00 1 04/02/2023 19:13 WG2034400
Dichlorodifluoromethane U 0.374 5.00 1 04/02/2023 19:13 WG2034400
1,1-Dichloroethane U 0.100 1.00 1 04/02/2023 19:13 WG2034400
1,2-Dichloroethane U 0.0819 1.00 1 04/02/2023 19:13 WG2034400
1,1-Dichloroethene U 0.188 1.00 1 04/02/2023 19:13 WG2034400
cis-1,2-Dichloroethene U 0.126 1.00 1 04/02/2023 19:13 WG2034400
trans-1,2-Dichloroethene U 0.149 1.00 1 04/02/2023 19:13 WG2034400
1,2-Dichloropropane U 0.149 1.00 1 04/02/2023 19:13 WG2034400
1,1-Dichloropropene U 0.142 1.00 1 04/02/2023 19:13 WG2034400
1,3-Dichloropropane U 0.110 1.00 1 04/02/2023 19:13 WG2034400
2,2-Dichloropropane U 0.161 1.00 1 04/02/2023 19:13 WG2034400
Di-isopropyl ether U 0.105 1.00 1 04/02/2023 19:13 WG2034400
Ethylbenzene U 0.137 1.00 1 04/02/2023 19:13 WG2034400
Hexachloro-1,3-butadiene U 0.337 1.00 1 04/02/2023 19:13 WG2034400
Isopropylbenzene U 0.105 1.00 1 04/02/2023 19:13 WG2034400
p-Isopropyltoluene U 0.120 1.00 1 04/02/2023 19:13 WG2034400
2-Butanone (MEK)U 1.19 10.0 1 04/02/2023 19:13 WG2034400
Methylene Chloride U 0.430 5.00 1 04/02/2023 19:13 WG2034400
4-Methyl-2-pentanone (MIBK)U 0.478 10.0 1 04/02/2023 19:13 WG2034400
Methyl tert-butyl ether U 0.101 1.00 1 04/02/2023 19:13 WG2034400
Naphthalene U 1.00 5.00 1 04/02/2023 19:13 WG2034400
n-Propylbenzene U 0.0993 1.00 1 04/02/2023 19:13 WG2034400
Styrene U 0.118 1.00 1 04/02/2023 19:13 WG2034400
1,1,1,2-Tetrachloroethane U 0.147 1.00 1 04/02/2023 19:13 WG2034400
1,1,2,2-Tetrachloroethane U 0.133 1.00 1 04/02/2023 19:13 WG2034400
Tetrachloroethene U 0.300 1.00 1 04/02/2023 19:13 WG2034400
Toluene U 0.278 1.00 1 04/02/2023 19:13 WG2034400
1,2,3-Trichlorobenzene U 0.230 1.00 1 04/02/2023 19:13 WG2034400
1,2,4-Trichlorobenzene U 0.481 1.00 1 04/02/2023 19:13 WG2034400
1,1,1-Trichloroethane U 0.149 1.00 1 04/02/2023 19:13 WG2034400
1,1,2-Trichloroethane U 0.158 1.00 1 04/02/2023 19:13 WG2034400
Trichloroethene U 0.190 1.00 1 04/02/2023 19:13 WG2034400
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
ATC Group Services LLC L1599585 04/06/23 15:47 7 of 28
SAMPLE RESULTS - 02
L1599585
MW-2
Collected date/time: 03/27/23 12:45
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 0.160 5.00 1 04/02/2023 19:13 WG2034400
1,2,3-Trichloropropane U 0.237 2.50 1 04/02/2023 19:13 WG2034400
1,2,4-Trimethylbenzene U 0.322 1.00 1 04/02/2023 19:13 WG2034400
1,3,5-Trimethylbenzene U 0.104 1.00 1 04/02/2023 19:13 WG2034400
Vinyl chloride U 0.234 1.00 1 04/02/2023 19:13 WG2034400
o-Xylene U 0.174 1.00 1 04/02/2023 19:13 WG2034400
m&p-Xylenes U 0.430 2.00 1 04/02/2023 19:13 WG2034400
(S) Toluene-d8 113 80.0-120 04/02/2023 19:13 WG2034400
(S) 4-Bromofluorobenzene 110 77.0-126 04/02/2023 19:13 WG2034400
(S) 1,2-Dichloroethane-d4 110 70.0-130 04/02/2023 19:13 WG2034400
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
ATC Group Services LLC L1599585 04/06/23 15:18 8 of 28
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
ATC Group Services LLC L1599585 04/06/23 15:47 8 of 28
SAMPLE RESULTS - 03
L1599585
MW-3
Collected date/time: 03/27/23 12:30
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone U 11.3 50.0 1 04/02/2023 19:34 WG2034400
Acrolein U 2.54 50.0 1 04/02/2023 19:34 WG2034400
Acrylonitrile U 0.671 10.0 1 04/02/2023 19:34 WG2034400
Benzene U 0.0941 1.00 1 04/02/2023 19:34 WG2034400
Bromobenzene U 0.118 1.00 1 04/02/2023 19:34 WG2034400
Bromodichloromethane U 0.136 1.00 1 04/02/2023 19:34 WG2034400
Bromoform U 0.129 1.00 1 04/02/2023 19:34 WG2034400
Bromomethane U C4 0.605 5.00 1 04/02/2023 19:34 WG2034400
n-Butylbenzene U 0.157 1.00 1 04/02/2023 19:34 WG2034400
sec-Butylbenzene U 0.125 1.00 1 04/02/2023 19:34 WG2034400
tert-Butylbenzene U 0.127 1.00 1 04/02/2023 19:34 WG2034400
Carbon tetrachloride U 0.128 1.00 1 04/02/2023 19:34 WG2034400
Chlorobenzene U 0.116 1.00 1 04/02/2023 19:34 WG2034400
Chlorodibromomethane U 0.140 1.00 1 04/02/2023 19:34 WG2034400
Chloroethane U 0.192 5.00 1 04/02/2023 19:34 WG2034400
Chloroform U 0.111 5.00 1 04/02/2023 19:34 WG2034400
Chloromethane U 0.960 2.50 1 04/02/2023 19:34 WG2034400
2-Chlorotoluene U 0.106 1.00 1 04/02/2023 19:34 WG2034400
4-Chlorotoluene U 0.114 1.00 1 04/02/2023 19:34 WG2034400
1,2-Dibromo-3-Chloropropane U J4 0.276 5.00 1 04/02/2023 19:34 WG2034400
1,2-Dibromoethane U 0.126 1.00 1 04/02/2023 19:34 WG2034400
Dibromomethane U 0.122 1.00 1 04/02/2023 19:34 WG2034400
1,2-Dichlorobenzene U 0.107 1.00 1 04/02/2023 19:34 WG2034400
1,3-Dichlorobenzene U 0.110 1.00 1 04/02/2023 19:34 WG2034400
1,4-Dichlorobenzene U 0.120 1.00 1 04/02/2023 19:34 WG2034400
Dichlorodifluoromethane U 0.374 5.00 1 04/02/2023 19:34 WG2034400
1,1-Dichloroethane U 0.100 1.00 1 04/02/2023 19:34 WG2034400
1,2-Dichloroethane U 0.0819 1.00 1 04/02/2023 19:34 WG2034400
1,1-Dichloroethene U 0.188 1.00 1 04/02/2023 19:34 WG2034400
cis-1,2-Dichloroethene U 0.126 1.00 1 04/02/2023 19:34 WG2034400
trans-1,2-Dichloroethene U 0.149 1.00 1 04/02/2023 19:34 WG2034400
1,2-Dichloropropane U 0.149 1.00 1 04/02/2023 19:34 WG2034400
1,1-Dichloropropene U 0.142 1.00 1 04/02/2023 19:34 WG2034400
1,3-Dichloropropane U 0.110 1.00 1 04/02/2023 19:34 WG2034400
2,2-Dichloropropane U 0.161 1.00 1 04/02/2023 19:34 WG2034400
Di-isopropyl ether U 0.105 1.00 1 04/02/2023 19:34 WG2034400
Ethylbenzene U 0.137 1.00 1 04/02/2023 19:34 WG2034400
Hexachloro-1,3-butadiene U 0.337 1.00 1 04/02/2023 19:34 WG2034400
Isopropylbenzene U 0.105 1.00 1 04/02/2023 19:34 WG2034400
p-Isopropyltoluene U 0.120 1.00 1 04/02/2023 19:34 WG2034400
2-Butanone (MEK)U 1.19 10.0 1 04/02/2023 19:34 WG2034400
Methylene Chloride U 0.430 5.00 1 04/02/2023 19:34 WG2034400
4-Methyl-2-pentanone (MIBK)U 0.478 10.0 1 04/02/2023 19:34 WG2034400
Methyl tert-butyl ether U 0.101 1.00 1 04/02/2023 19:34 WG2034400
Naphthalene U 1.00 5.00 1 04/02/2023 19:34 WG2034400
n-Propylbenzene U 0.0993 1.00 1 04/02/2023 19:34 WG2034400
Styrene U 0.118 1.00 1 04/02/2023 19:34 WG2034400
1,1,1,2-Tetrachloroethane U 0.147 1.00 1 04/02/2023 19:34 WG2034400
1,1,2,2-Tetrachloroethane U 0.133 1.00 1 04/02/2023 19:34 WG2034400
Tetrachloroethene U 0.300 1.00 1 04/02/2023 19:34 WG2034400
Toluene U 0.278 1.00 1 04/02/2023 19:34 WG2034400
1,2,3-Trichlorobenzene U 0.230 1.00 1 04/02/2023 19:34 WG2034400
1,2,4-Trichlorobenzene U 0.481 1.00 1 04/02/2023 19:34 WG2034400
1,1,1-Trichloroethane U 0.149 1.00 1 04/02/2023 19:34 WG2034400
1,1,2-Trichloroethane U 0.158 1.00 1 04/02/2023 19:34 WG2034400
Trichloroethene U 0.190 1.00 1 04/02/2023 19:34 WG2034400
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
ATC Group Services LLC L1599585 04/06/23 15:18 9 of 28
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
ATC Group Services LLC L1599585 04/06/23 15:47 9 of 28
SAMPLE RESULTS - 03
L1599585
MW-3
Collected date/time: 03/27/23 12:30
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 0.160 5.00 1 04/02/2023 19:34 WG2034400
1,2,3-Trichloropropane U 0.237 2.50 1 04/02/2023 19:34 WG2034400
1,2,4-Trimethylbenzene U 0.322 1.00 1 04/02/2023 19:34 WG2034400
1,3,5-Trimethylbenzene U 0.104 1.00 1 04/02/2023 19:34 WG2034400
Vinyl chloride U 0.234 1.00 1 04/02/2023 19:34 WG2034400
o-Xylene U 0.174 1.00 1 04/02/2023 19:34 WG2034400
m&p-Xylenes U 0.430 2.00 1 04/02/2023 19:34 WG2034400
(S) Toluene-d8 112 80.0-120 04/02/2023 19:34 WG2034400
(S) 4-Bromofluorobenzene 110 77.0-126 04/02/2023 19:34 WG2034400
(S) 1,2-Dichloroethane-d4 111 70.0-130 04/02/2023 19:34 WG2034400
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
ATC Group Services LLC L1599585 04/06/23 15:18 10 of 28
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
ATC Group Services LLC L1599585 04/06/23 15:47 10 of 28
SAMPLE RESULTS - 04
L1599585
MW-4
Collected date/time: 03/27/23 12:15
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone 17.9 J 11.3 50.0 1 04/02/2023 19:55 WG2034400
Acrolein U 2.54 50.0 1 04/02/2023 19:55 WG2034400
Acrylonitrile U 0.671 10.0 1 04/02/2023 19:55 WG2034400
Benzene U 0.0941 1.00 1 04/02/2023 19:55 WG2034400
Bromobenzene U 0.118 1.00 1 04/02/2023 19:55 WG2034400
Bromodichloromethane U 0.136 1.00 1 04/02/2023 19:55 WG2034400
Bromoform U 0.129 1.00 1 04/02/2023 19:55 WG2034400
Bromomethane U C4 0.605 5.00 1 04/02/2023 19:55 WG2034400
n-Butylbenzene U 0.157 1.00 1 04/02/2023 19:55 WG2034400
sec-Butylbenzene U 0.125 1.00 1 04/02/2023 19:55 WG2034400
tert-Butylbenzene U 0.127 1.00 1 04/02/2023 19:55 WG2034400
Carbon tetrachloride U 0.128 1.00 1 04/02/2023 19:55 WG2034400
Chlorobenzene U 0.116 1.00 1 04/02/2023 19:55 WG2034400
Chlorodibromomethane U 0.140 1.00 1 04/02/2023 19:55 WG2034400
Chloroethane U 0.192 5.00 1 04/02/2023 19:55 WG2034400
Chloroform U 0.111 5.00 1 04/02/2023 19:55 WG2034400
Chloromethane U 0.960 2.50 1 04/02/2023 19:55 WG2034400
2-Chlorotoluene U 0.106 1.00 1 04/02/2023 19:55 WG2034400
4-Chlorotoluene U 0.114 1.00 1 04/02/2023 19:55 WG2034400
1,2-Dibromo-3-Chloropropane U J4 0.276 5.00 1 04/02/2023 19:55 WG2034400
1,2-Dibromoethane U 0.126 1.00 1 04/02/2023 19:55 WG2034400
Dibromomethane U 0.122 1.00 1 04/02/2023 19:55 WG2034400
1,2-Dichlorobenzene U 0.107 1.00 1 04/02/2023 19:55 WG2034400
1,3-Dichlorobenzene U 0.110 1.00 1 04/02/2023 19:55 WG2034400
1,4-Dichlorobenzene U 0.120 1.00 1 04/02/2023 19:55 WG2034400
Dichlorodifluoromethane U 0.374 5.00 1 04/02/2023 19:55 WG2034400
1,1-Dichloroethane U 0.100 1.00 1 04/02/2023 19:55 WG2034400
1,2-Dichloroethane U 0.0819 1.00 1 04/02/2023 19:55 WG2034400
1,1-Dichloroethene U 0.188 1.00 1 04/02/2023 19:55 WG2034400
cis-1,2-Dichloroethene U 0.126 1.00 1 04/02/2023 19:55 WG2034400
trans-1,2-Dichloroethene U 0.149 1.00 1 04/02/2023 19:55 WG2034400
1,2-Dichloropropane U 0.149 1.00 1 04/02/2023 19:55 WG2034400
1,1-Dichloropropene U 0.142 1.00 1 04/02/2023 19:55 WG2034400
1,3-Dichloropropane U 0.110 1.00 1 04/02/2023 19:55 WG2034400
2,2-Dichloropropane U 0.161 1.00 1 04/02/2023 19:55 WG2034400
Di-isopropyl ether U 0.105 1.00 1 04/02/2023 19:55 WG2034400
Ethylbenzene U 0.137 1.00 1 04/02/2023 19:55 WG2034400
Hexachloro-1,3-butadiene U 0.337 1.00 1 04/02/2023 19:55 WG2034400
Isopropylbenzene U 0.105 1.00 1 04/02/2023 19:55 WG2034400
p-Isopropyltoluene U 0.120 1.00 1 04/02/2023 19:55 WG2034400
2-Butanone (MEK)U 1.19 10.0 1 04/02/2023 19:55 WG2034400
Methylene Chloride U 0.430 5.00 1 04/02/2023 19:55 WG2034400
4-Methyl-2-pentanone (MIBK)U 0.478 10.0 1 04/02/2023 19:55 WG2034400
Methyl tert-butyl ether U 0.101 1.00 1 04/02/2023 19:55 WG2034400
Naphthalene U 1.00 5.00 1 04/02/2023 19:55 WG2034400
n-Propylbenzene U 0.0993 1.00 1 04/02/2023 19:55 WG2034400
Styrene U 0.118 1.00 1 04/02/2023 19:55 WG2034400
1,1,1,2-Tetrachloroethane U 0.147 1.00 1 04/02/2023 19:55 WG2034400
1,1,2,2-Tetrachloroethane U 0.133 1.00 1 04/02/2023 19:55 WG2034400
Tetrachloroethene U 0.300 1.00 1 04/02/2023 19:55 WG2034400
Toluene U 0.278 1.00 1 04/02/2023 19:55 WG2034400
1,2,3-Trichlorobenzene U 0.230 1.00 1 04/02/2023 19:55 WG2034400
1,2,4-Trichlorobenzene U 0.481 1.00 1 04/02/2023 19:55 WG2034400
1,1,1-Trichloroethane U 0.149 1.00 1 04/02/2023 19:55 WG2034400
1,1,2-Trichloroethane U 0.158 1.00 1 04/02/2023 19:55 WG2034400
Trichloroethene U 0.190 1.00 1 04/02/2023 19:55 WG2034400
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
ATC Group Services LLC L1599585 04/06/23 15:18 11 of 28
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
ATC Group Services LLC L1599585 04/06/23 15:47 11 of 28
SAMPLE RESULTS - 04
L1599585
MW-4
Collected date/time: 03/27/23 12:15
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 0.160 5.00 1 04/02/2023 19:55 WG2034400
1,2,3-Trichloropropane U 0.237 2.50 1 04/02/2023 19:55 WG2034400
1,2,4-Trimethylbenzene U 0.322 1.00 1 04/02/2023 19:55 WG2034400
1,3,5-Trimethylbenzene U 0.104 1.00 1 04/02/2023 19:55 WG2034400
Vinyl chloride U 0.234 1.00 1 04/02/2023 19:55 WG2034400
o-Xylene U 0.174 1.00 1 04/02/2023 19:55 WG2034400
m&p-Xylenes U 0.430 2.00 1 04/02/2023 19:55 WG2034400
(S) Toluene-d8 113 80.0-120 04/02/2023 19:55 WG2034400
(S) 4-Bromofluorobenzene 109 77.0-126 04/02/2023 19:55 WG2034400
(S) 1,2-Dichloroethane-d4 110 70.0-130 04/02/2023 19:55 WG2034400
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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SAMPLE RESULTS - 05
L1599585
MW-5
Collected date/time: 03/27/23 13:20
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone U 113 500 10 04/02/2023 22:42 WG2034400
Acrolein U 25.4 500 10 04/02/2023 22:42 WG2034400
Acrylonitrile U 6.71 100 10 04/02/2023 22:42 WG2034400
Benzene 1210 0.941 10.0 10 04/02/2023 22:42 WG2034400
Bromobenzene U 1.18 10.0 10 04/02/2023 22:42 WG2034400
Bromodichloromethane U 1.36 10.0 10 04/02/2023 22:42 WG2034400
Bromoform U 1.29 10.0 10 04/02/2023 22:42 WG2034400
Bromomethane U C4 6.05 50.0 10 04/02/2023 22:42 WG2034400
n-Butylbenzene 22.0 1.57 10.0 10 04/02/2023 22:42 WG2034400
sec-Butylbenzene 13.8 1.25 10.0 10 04/02/2023 22:42 WG2034400
tert-Butylbenzene U 1.27 10.0 10 04/02/2023 22:42 WG2034400
Carbon tetrachloride U 1.28 10.0 10 04/02/2023 22:42 WG2034400
Chlorobenzene U 1.16 10.0 10 04/02/2023 22:42 WG2034400
Chlorodibromomethane U 1.40 10.0 10 04/02/2023 22:42 WG2034400
Chloroethane U 1.92 50.0 10 04/02/2023 22:42 WG2034400
Chloroform U 1.11 50.0 10 04/02/2023 22:42 WG2034400
Chloromethane U 9.60 25.0 10 04/02/2023 22:42 WG2034400
2-Chlorotoluene U 1.06 10.0 10 04/02/2023 22:42 WG2034400
4-Chlorotoluene U 1.14 10.0 10 04/02/2023 22:42 WG2034400
1,2-Dibromo-3-Chloropropane U J4 2.76 50.0 10 04/02/2023 22:42 WG2034400
1,2-Dibromoethane 16.3 1.26 10.0 10 04/02/2023 22:42 WG2034400
Dibromomethane U 1.22 10.0 10 04/02/2023 22:42 WG2034400
1,2-Dichlorobenzene U 1.07 10.0 10 04/02/2023 22:42 WG2034400
1,3-Dichlorobenzene U 1.10 10.0 10 04/02/2023 22:42 WG2034400
1,4-Dichlorobenzene U 1.20 10.0 10 04/02/2023 22:42 WG2034400
Dichlorodifluoromethane U 3.74 50.0 10 04/02/2023 22:42 WG2034400
1,1-Dichloroethane U 1.00 10.0 10 04/02/2023 22:42 WG2034400
1,2-Dichloroethane U 0.819 10.0 10 04/02/2023 22:42 WG2034400
1,1-Dichloroethene U 1.88 10.0 10 04/02/2023 22:42 WG2034400
cis-1,2-Dichloroethene U 1.26 10.0 10 04/02/2023 22:42 WG2034400
trans-1,2-Dichloroethene U 1.49 10.0 10 04/02/2023 22:42 WG2034400
1,2-Dichloropropane U 1.49 10.0 10 04/02/2023 22:42 WG2034400
1,1-Dichloropropene U 1.42 10.0 10 04/02/2023 22:42 WG2034400
1,3-Dichloropropane U 1.10 10.0 10 04/02/2023 22:42 WG2034400
2,2-Dichloropropane U 1.61 10.0 10 04/02/2023 22:42 WG2034400
Di-isopropyl ether U 1.05 10.0 10 04/02/2023 22:42 WG2034400
Ethylbenzene 833 1.37 10.0 10 04/02/2023 22:42 WG2034400
Hexachloro-1,3-butadiene U 3.37 10.0 10 04/02/2023 22:42 WG2034400
Isopropylbenzene 51.5 1.05 10.0 10 04/02/2023 22:42 WG2034400
p-Isopropyltoluene 4.98 J 1.20 10.0 10 04/02/2023 22:42 WG2034400
2-Butanone (MEK)U 11.9 100 10 04/02/2023 22:42 WG2034400
Methylene Chloride U 4.30 50.0 10 04/02/2023 22:42 WG2034400
4-Methyl-2-pentanone (MIBK)U 4.78 100 10 04/02/2023 22:42 WG2034400
Methyl tert-butyl ether U 1.01 10.0 10 04/02/2023 22:42 WG2034400
Naphthalene 281 10.0 50.0 10 04/02/2023 22:42 WG2034400
n-Propylbenzene 149 0.993 10.0 10 04/02/2023 22:42 WG2034400
Styrene 11.3 1.18 10.0 10 04/02/2023 22:42 WG2034400
1,1,1,2-Tetrachloroethane U 1.47 10.0 10 04/02/2023 22:42 WG2034400
1,1,2,2-Tetrachloroethane U 1.33 10.0 10 04/02/2023 22:42 WG2034400
Tetrachloroethene U 3.00 10.0 10 04/02/2023 22:42 WG2034400
Toluene 3890 27.8 100 100 04/05/2023 23:52 WG2036693
1,2,3-Trichlorobenzene U 2.30 10.0 10 04/02/2023 22:42 WG2034400
1,2,4-Trichlorobenzene U 4.81 10.0 10 04/02/2023 22:42 WG2034400
1,1,1-Trichloroethane U 1.49 10.0 10 04/02/2023 22:42 WG2034400
1,1,2-Trichloroethane U 1.58 10.0 10 04/02/2023 22:42 WG2034400
Trichloroethene U 1.90 10.0 10 04/02/2023 22:42 WG2034400
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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ATC Group Services LLC L1599585 04/06/23 15:47 13 of 28
SAMPLE RESULTS - 05
L1599585
MW-5
Collected date/time: 03/27/23 13:20
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 1.60 50.0 10 04/02/2023 22:42 WG2034400
1,2,3-Trichloropropane U 2.37 25.0 10 04/02/2023 22:42 WG2034400
1,2,4-Trimethylbenzene 966 3.22 10.0 10 04/02/2023 22:42 WG2034400
1,3,5-Trimethylbenzene 250 1.04 10.0 10 04/02/2023 22:42 WG2034400
Vinyl chloride U 2.34 10.0 10 04/02/2023 22:42 WG2034400
o-Xylene 1150 1.74 10.0 10 04/02/2023 22:42 WG2034400
m&p-Xylenes 2650 4.30 20.0 10 04/02/2023 22:42 WG2034400
(S) Toluene-d8 108 80.0-120 04/02/2023 22:42 WG2034400
(S) Toluene-d8 107 80.0-120 04/05/2023 23:52 WG2036693
(S) 4-Bromofluorobenzene 106 77.0-126 04/02/2023 22:42 WG2034400
(S) 4-Bromofluorobenzene 101 77.0-126 04/05/2023 23:52 WG2036693
(S) 1,2-Dichloroethane-d4 108 70.0-130 04/02/2023 22:42 WG2034400
(S) 1,2-Dichloroethane-d4 103 70.0-130 04/05/2023 23:52 WG2036693
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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ATC Group Services LLC L1599585 04/06/23 15:47 14 of 28
SAMPLE RESULTS - 06
L1599585
DMW-1
Collected date/time: 03/27/23 13:05
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone 20.5 J 11.3 50.0 1 04/05/2023 23:31 WG2036693
Acrolein U 2.54 50.0 1 04/02/2023 20:16 WG2034400
Acrylonitrile U 0.671 10.0 1 04/02/2023 20:16 WG2034400
Benzene 0.173 J 0.0941 1.00 1 04/02/2023 20:16 WG2034400
Bromobenzene U 0.118 1.00 1 04/02/2023 20:16 WG2034400
Bromodichloromethane U 0.136 1.00 1 04/02/2023 20:16 WG2034400
Bromoform U 0.129 1.00 1 04/02/2023 20:16 WG2034400
Bromomethane U C4 0.605 5.00 1 04/02/2023 20:16 WG2034400
n-Butylbenzene U 0.157 1.00 1 04/02/2023 20:16 WG2034400
sec-Butylbenzene U 0.125 1.00 1 04/02/2023 20:16 WG2034400
tert-Butylbenzene U 0.127 1.00 1 04/02/2023 20:16 WG2034400
Carbon tetrachloride U 0.128 1.00 1 04/02/2023 20:16 WG2034400
Chlorobenzene U 0.116 1.00 1 04/02/2023 20:16 WG2034400
Chlorodibromomethane U 0.140 1.00 1 04/02/2023 20:16 WG2034400
Chloroethane U 0.192 5.00 1 04/02/2023 20:16 WG2034400
Chloroform U 0.111 5.00 1 04/02/2023 20:16 WG2034400
Chloromethane U 0.960 2.50 1 04/02/2023 20:16 WG2034400
2-Chlorotoluene U 0.106 1.00 1 04/02/2023 20:16 WG2034400
4-Chlorotoluene U 0.114 1.00 1 04/02/2023 20:16 WG2034400
1,2-Dibromo-3-Chloropropane U J4 0.276 5.00 1 04/02/2023 20:16 WG2034400
1,2-Dibromoethane U 0.126 1.00 1 04/02/2023 20:16 WG2034400
Dibromomethane U 0.122 1.00 1 04/02/2023 20:16 WG2034400
1,2-Dichlorobenzene U 0.107 1.00 1 04/02/2023 20:16 WG2034400
1,3-Dichlorobenzene U 0.110 1.00 1 04/02/2023 20:16 WG2034400
1,4-Dichlorobenzene U 0.120 1.00 1 04/02/2023 20:16 WG2034400
Dichlorodifluoromethane U 0.374 5.00 1 04/02/2023 20:16 WG2034400
1,1-Dichloroethane U 0.100 1.00 1 04/02/2023 20:16 WG2034400
1,2-Dichloroethane U 0.0819 1.00 1 04/02/2023 20:16 WG2034400
1,1-Dichloroethene U 0.188 1.00 1 04/02/2023 20:16 WG2034400
cis-1,2-Dichloroethene U 0.126 1.00 1 04/02/2023 20:16 WG2034400
trans-1,2-Dichloroethene U 0.149 1.00 1 04/02/2023 20:16 WG2034400
1,2-Dichloropropane U 0.149 1.00 1 04/02/2023 20:16 WG2034400
1,1-Dichloropropene U 0.142 1.00 1 04/02/2023 20:16 WG2034400
1,3-Dichloropropane U 0.110 1.00 1 04/02/2023 20:16 WG2034400
2,2-Dichloropropane U 0.161 1.00 1 04/02/2023 20:16 WG2034400
Di-isopropyl ether U 0.105 1.00 1 04/02/2023 20:16 WG2034400
Ethylbenzene 31.0 0.137 1.00 1 04/02/2023 20:16 WG2034400
Hexachloro-1,3-butadiene U 0.337 1.00 1 04/02/2023 20:16 WG2034400
Isopropylbenzene 1.78 0.105 1.00 1 04/02/2023 20:16 WG2034400
p-Isopropyltoluene 0.363 J 0.120 1.00 1 04/02/2023 20:16 WG2034400
2-Butanone (MEK)U 1.19 10.0 1 04/02/2023 20:16 WG2034400
Methylene Chloride U 0.430 5.00 1 04/02/2023 20:16 WG2034400
4-Methyl-2-pentanone (MIBK)0.761 J 0.478 10.0 1 04/02/2023 20:16 WG2034400
Methyl tert-butyl ether U 0.101 1.00 1 04/02/2023 20:16 WG2034400
Naphthalene 4.81 J 1.00 5.00 1 04/02/2023 20:16 WG2034400
n-Propylbenzene 3.75 0.0993 1.00 1 04/02/2023 20:16 WG2034400
Styrene U 0.118 1.00 1 04/02/2023 20:16 WG2034400
1,1,1,2-Tetrachloroethane U 0.147 1.00 1 04/02/2023 20:16 WG2034400
1,1,2,2-Tetrachloroethane U 0.133 1.00 1 04/02/2023 20:16 WG2034400
Tetrachloroethene U 0.300 1.00 1 04/02/2023 20:16 WG2034400
Toluene 15.0 0.278 1.00 1 04/02/2023 20:16 WG2034400
1,2,3-Trichlorobenzene U 0.230 1.00 1 04/02/2023 20:16 WG2034400
1,2,4-Trichlorobenzene U 0.481 1.00 1 04/02/2023 20:16 WG2034400
1,1,1-Trichloroethane U 0.149 1.00 1 04/02/2023 20:16 WG2034400
1,1,2-Trichloroethane U 0.158 1.00 1 04/02/2023 20:16 WG2034400
Trichloroethene U 0.190 1.00 1 04/02/2023 20:16 WG2034400
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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ATC Group Services LLC L1599585 04/06/23 15:47 15 of 28
SAMPLE RESULTS - 06
L1599585
DMW-1
Collected date/time: 03/27/23 13:05
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 0.160 5.00 1 04/02/2023 20:16 WG2034400
1,2,3-Trichloropropane U 0.237 2.50 1 04/02/2023 20:16 WG2034400
1,2,4-Trimethylbenzene 30.1 0.322 1.00 1 04/02/2023 20:16 WG2034400
1,3,5-Trimethylbenzene 7.61 0.104 1.00 1 04/02/2023 20:16 WG2034400
Vinyl chloride U 0.234 1.00 1 04/02/2023 20:16 WG2034400
o-Xylene 37.2 0.174 1.00 1 04/02/2023 20:16 WG2034400
m&p-Xylenes 109 0.430 2.00 1 04/02/2023 20:16 WG2034400
(S) Toluene-d8 108 80.0-120 04/02/2023 20:16 WG2034400
(S) Toluene-d8 106 80.0-120 04/05/2023 23:31 WG2036693
(S) 4-Bromofluorobenzene 106 77.0-126 04/02/2023 20:16 WG2034400
(S) 4-Bromofluorobenzene 97.4 77.0-126 04/05/2023 23:31 WG2036693
(S) 1,2-Dichloroethane-d4 107 70.0-130 04/02/2023 20:16 WG2034400
(S) 1,2-Dichloroethane-d4 109 70.0-130 04/05/2023 23:31 WG2036693
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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ATC Group Services LLC L1599585 04/06/23 15:47 16 of 28
SAMPLE RESULTS - 07
L1599585
RW-1
Collected date/time: 03/27/23 14:35
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone U 11.3 50.0 1 04/02/2023 20:37 WG2034400
Acrolein U 2.54 50.0 1 04/02/2023 20:37 WG2034400
Acrylonitrile U 0.671 10.0 1 04/02/2023 20:37 WG2034400
Benzene U 0.0941 1.00 1 04/02/2023 20:37 WG2034400
Bromobenzene U 0.118 1.00 1 04/02/2023 20:37 WG2034400
Bromodichloromethane U 0.136 1.00 1 04/02/2023 20:37 WG2034400
Bromoform U 0.129 1.00 1 04/02/2023 20:37 WG2034400
Bromomethane U C4 0.605 5.00 1 04/02/2023 20:37 WG2034400
n-Butylbenzene 2.15 0.157 1.00 1 04/02/2023 20:37 WG2034400
sec-Butylbenzene 0.939 J 0.125 1.00 1 04/02/2023 20:37 WG2034400
tert-Butylbenzene U 0.127 1.00 1 04/02/2023 20:37 WG2034400
Carbon tetrachloride U 0.128 1.00 1 04/02/2023 20:37 WG2034400
Chlorobenzene U 0.116 1.00 1 04/02/2023 20:37 WG2034400
Chlorodibromomethane U 0.140 1.00 1 04/02/2023 20:37 WG2034400
Chloroethane U 0.192 5.00 1 04/02/2023 20:37 WG2034400
Chloroform U 0.111 5.00 1 04/02/2023 20:37 WG2034400
Chloromethane U 0.960 2.50 1 04/02/2023 20:37 WG2034400
2-Chlorotoluene U 0.106 1.00 1 04/02/2023 20:37 WG2034400
4-Chlorotoluene U 0.114 1.00 1 04/02/2023 20:37 WG2034400
1,2-Dibromo-3-Chloropropane U J4 0.276 5.00 1 04/02/2023 20:37 WG2034400
1,2-Dibromoethane U 0.126 1.00 1 04/02/2023 20:37 WG2034400
Dibromomethane U 0.122 1.00 1 04/02/2023 20:37 WG2034400
1,2-Dichlorobenzene U 0.107 1.00 1 04/02/2023 20:37 WG2034400
1,3-Dichlorobenzene U 0.110 1.00 1 04/02/2023 20:37 WG2034400
1,4-Dichlorobenzene U 0.120 1.00 1 04/02/2023 20:37 WG2034400
Dichlorodifluoromethane U 0.374 5.00 1 04/02/2023 20:37 WG2034400
1,1-Dichloroethane U 0.100 1.00 1 04/02/2023 20:37 WG2034400
1,2-Dichloroethane U 0.0819 1.00 1 04/02/2023 20:37 WG2034400
1,1-Dichloroethene U 0.188 1.00 1 04/02/2023 20:37 WG2034400
cis-1,2-Dichloroethene U 0.126 1.00 1 04/02/2023 20:37 WG2034400
trans-1,2-Dichloroethene U 0.149 1.00 1 04/02/2023 20:37 WG2034400
1,2-Dichloropropane U 0.149 1.00 1 04/02/2023 20:37 WG2034400
1,1-Dichloropropene U 0.142 1.00 1 04/02/2023 20:37 WG2034400
1,3-Dichloropropane U 0.110 1.00 1 04/02/2023 20:37 WG2034400
2,2-Dichloropropane U 0.161 1.00 1 04/02/2023 20:37 WG2034400
Di-isopropyl ether U 0.105 1.00 1 04/02/2023 20:37 WG2034400
Ethylbenzene 0.585 J 0.137 1.00 1 04/02/2023 20:37 WG2034400
Hexachloro-1,3-butadiene U 0.337 1.00 1 04/02/2023 20:37 WG2034400
Isopropylbenzene 0.298 J 0.105 1.00 1 04/02/2023 20:37 WG2034400
p-Isopropyltoluene 0.431 J 0.120 1.00 1 04/02/2023 20:37 WG2034400
2-Butanone (MEK)U 1.19 10.0 1 04/02/2023 20:37 WG2034400
Methylene Chloride U 0.430 5.00 1 04/02/2023 20:37 WG2034400
4-Methyl-2-pentanone (MIBK)U 0.478 10.0 1 04/02/2023 20:37 WG2034400
Methyl tert-butyl ether U 0.101 1.00 1 04/02/2023 20:37 WG2034400
Naphthalene U 1.00 5.00 1 04/02/2023 20:37 WG2034400
n-Propylbenzene 1.41 0.0993 1.00 1 04/02/2023 20:37 WG2034400
Styrene U 0.118 1.00 1 04/02/2023 20:37 WG2034400
1,1,1,2-Tetrachloroethane U 0.147 1.00 1 04/02/2023 20:37 WG2034400
1,1,2,2-Tetrachloroethane U 0.133 1.00 1 04/02/2023 20:37 WG2034400
Tetrachloroethene U 0.300 1.00 1 04/02/2023 20:37 WG2034400
Toluene U 0.278 1.00 1 04/02/2023 20:37 WG2034400
1,2,3-Trichlorobenzene U 0.230 1.00 1 04/02/2023 20:37 WG2034400
1,2,4-Trichlorobenzene U 0.481 1.00 1 04/02/2023 20:37 WG2034400
1,1,1-Trichloroethane U 0.149 1.00 1 04/02/2023 20:37 WG2034400
1,1,2-Trichloroethane U 0.158 1.00 1 04/02/2023 20:37 WG2034400
Trichloroethene U 0.190 1.00 1 04/02/2023 20:37 WG2034400
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
ATC Group Services LLC L1599585 04/06/23 15:47 17 of 28
SAMPLE RESULTS - 07
L1599585
RW-1
Collected date/time: 03/27/23 14:35
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 0.160 5.00 1 04/02/2023 20:37 WG2034400
1,2,3-Trichloropropane U 0.237 2.50 1 04/02/2023 20:37 WG2034400
1,2,4-Trimethylbenzene 4.41 0.322 1.00 1 04/02/2023 20:37 WG2034400
1,3,5-Trimethylbenzene 1.67 0.104 1.00 1 04/02/2023 20:37 WG2034400
Vinyl chloride U 0.234 1.00 1 04/02/2023 20:37 WG2034400
o-Xylene 0.333 J 0.174 1.00 1 04/02/2023 20:37 WG2034400
m&p-Xylenes 1.74 J 0.430 2.00 1 04/02/2023 20:37 WG2034400
(S) Toluene-d8 112 80.0-120 04/02/2023 20:37 WG2034400
(S) 4-Bromofluorobenzene 106 77.0-126 04/02/2023 20:37 WG2034400
(S) 1,2-Dichloroethane-d4 108 70.0-130 04/02/2023 20:37 WG2034400
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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SAMPLE RESULTS - 08
L1599585
FB-1
Collected date/time: 03/27/23 14:40
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone 16.5 J 11.3 50.0 1 04/02/2023 16:04 WG2034400
Acrolein U 2.54 50.0 1 04/02/2023 16:04 WG2034400
Acrylonitrile U 0.671 10.0 1 04/02/2023 16:04 WG2034400
Benzene U 0.0941 1.00 1 04/02/2023 16:04 WG2034400
Bromobenzene U 0.118 1.00 1 04/02/2023 16:04 WG2034400
Bromodichloromethane U 0.136 1.00 1 04/02/2023 16:04 WG2034400
Bromoform U 0.129 1.00 1 04/02/2023 16:04 WG2034400
Bromomethane U C4 0.605 5.00 1 04/02/2023 16:04 WG2034400
n-Butylbenzene U 0.157 1.00 1 04/02/2023 16:04 WG2034400
sec-Butylbenzene U 0.125 1.00 1 04/02/2023 16:04 WG2034400
tert-Butylbenzene U 0.127 1.00 1 04/02/2023 16:04 WG2034400
Carbon tetrachloride U 0.128 1.00 1 04/02/2023 16:04 WG2034400
Chlorobenzene U 0.116 1.00 1 04/02/2023 16:04 WG2034400
Chlorodibromomethane U 0.140 1.00 1 04/02/2023 16:04 WG2034400
Chloroethane U 0.192 5.00 1 04/02/2023 16:04 WG2034400
Chloroform U 0.111 5.00 1 04/02/2023 16:04 WG2034400
Chloromethane U 0.960 2.50 1 04/02/2023 16:04 WG2034400
2-Chlorotoluene U 0.106 1.00 1 04/02/2023 16:04 WG2034400
4-Chlorotoluene U 0.114 1.00 1 04/02/2023 16:04 WG2034400
1,2-Dibromo-3-Chloropropane U J4 0.276 5.00 1 04/02/2023 16:04 WG2034400
1,2-Dibromoethane U 0.126 1.00 1 04/02/2023 16:04 WG2034400
Dibromomethane U 0.122 1.00 1 04/02/2023 16:04 WG2034400
1,2-Dichlorobenzene U 0.107 1.00 1 04/02/2023 16:04 WG2034400
1,3-Dichlorobenzene U 0.110 1.00 1 04/02/2023 16:04 WG2034400
1,4-Dichlorobenzene U 0.120 1.00 1 04/02/2023 16:04 WG2034400
Dichlorodifluoromethane U 0.374 5.00 1 04/02/2023 16:04 WG2034400
1,1-Dichloroethane U 0.100 1.00 1 04/02/2023 16:04 WG2034400
1,2-Dichloroethane U 0.0819 1.00 1 04/02/2023 16:04 WG2034400
1,1-Dichloroethene U 0.188 1.00 1 04/02/2023 16:04 WG2034400
cis-1,2-Dichloroethene U 0.126 1.00 1 04/02/2023 16:04 WG2034400
trans-1,2-Dichloroethene U 0.149 1.00 1 04/02/2023 16:04 WG2034400
1,2-Dichloropropane U 0.149 1.00 1 04/02/2023 16:04 WG2034400
1,1-Dichloropropene U 0.142 1.00 1 04/02/2023 16:04 WG2034400
1,3-Dichloropropane U 0.110 1.00 1 04/02/2023 16:04 WG2034400
2,2-Dichloropropane U 0.161 1.00 1 04/02/2023 16:04 WG2034400
Di-isopropyl ether U 0.105 1.00 1 04/02/2023 16:04 WG2034400
Ethylbenzene U 0.137 1.00 1 04/02/2023 16:04 WG2034400
Hexachloro-1,3-butadiene U 0.337 1.00 1 04/02/2023 16:04 WG2034400
Isopropylbenzene U 0.105 1.00 1 04/02/2023 16:04 WG2034400
p-Isopropyltoluene U 0.120 1.00 1 04/02/2023 16:04 WG2034400
2-Butanone (MEK)U 1.19 10.0 1 04/02/2023 16:04 WG2034400
Methylene Chloride 1.29 J 0.430 5.00 1 04/02/2023 16:04 WG2034400
4-Methyl-2-pentanone (MIBK)U 0.478 10.0 1 04/02/2023 16:04 WG2034400
Methyl tert-butyl ether U 0.101 1.00 1 04/02/2023 16:04 WG2034400
Naphthalene U 1.00 5.00 1 04/02/2023 16:04 WG2034400
n-Propylbenzene U 0.0993 1.00 1 04/02/2023 16:04 WG2034400
Styrene U 0.118 1.00 1 04/02/2023 16:04 WG2034400
1,1,1,2-Tetrachloroethane U 0.147 1.00 1 04/02/2023 16:04 WG2034400
1,1,2,2-Tetrachloroethane U 0.133 1.00 1 04/02/2023 16:04 WG2034400
Tetrachloroethene U 0.300 1.00 1 04/02/2023 16:04 WG2034400
Toluene U 0.278 1.00 1 04/02/2023 16:04 WG2034400
1,2,3-Trichlorobenzene U 0.230 1.00 1 04/02/2023 16:04 WG2034400
1,2,4-Trichlorobenzene U 0.481 1.00 1 04/02/2023 16:04 WG2034400
1,1,1-Trichloroethane U 0.149 1.00 1 04/02/2023 16:04 WG2034400
1,1,2-Trichloroethane U 0.158 1.00 1 04/02/2023 16:04 WG2034400
Trichloroethene U 0.190 1.00 1 04/02/2023 16:04 WG2034400
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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SAMPLE RESULTS - 08
L1599585
FB-1
Collected date/time: 03/27/23 14:40
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 0.160 5.00 1 04/02/2023 16:04 WG2034400
1,2,3-Trichloropropane U 0.237 2.50 1 04/02/2023 16:04 WG2034400
1,2,4-Trimethylbenzene U 0.322 1.00 1 04/02/2023 16:04 WG2034400
1,3,5-Trimethylbenzene U 0.104 1.00 1 04/02/2023 16:04 WG2034400
Vinyl chloride U 0.234 1.00 1 04/02/2023 16:04 WG2034400
o-Xylene U 0.174 1.00 1 04/02/2023 16:04 WG2034400
m&p-Xylenes U 0.430 2.00 1 04/02/2023 16:04 WG2034400
(S) Toluene-d8 113 80.0-120 04/02/2023 16:04 WG2034400
(S) 4-Bromofluorobenzene 110 77.0-126 04/02/2023 16:04 WG2034400
(S) 1,2-Dichloroethane-d4 110 70.0-130 04/02/2023 16:04 WG2034400
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG2034400
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1599585-01,02,03,04,05,06,07,08
Method Blank (MB)
(MB) R3909572-5 04/02/23 14:45
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
Acetone U 11.3 50.0
Acrolein U 2.54 50.0
Acrylonitrile U 0.671 10.0
Benzene U 0.0941 1.00
Bromobenzene U 0.118 1.00
Bromodichloromethane U 0.136 1.00
Bromoform U 0.129 1.00
Bromomethane U 0.605 5.00
n-Butylbenzene U 0.157 1.00
sec-Butylbenzene U 0.125 1.00
tert-Butylbenzene U 0.127 1.00
Carbon tetrachloride U 0.128 1.00
Chlorobenzene U 0.116 1.00
Chlorodibromomethane U 0.140 1.00
Chloroethane U 0.192 5.00
Chloroform U 0.111 5.00
Chloromethane U 0.960 2.50
2-Chlorotoluene U 0.106 1.00
4-Chlorotoluene U 0.114 1.00
1,2-Dibromo-3-Chloropropane U 0.276 5.00
1,2-Dibromoethane U 0.126 1.00
Dibromomethane U 0.122 1.00
1,2-Dichlorobenzene U 0.107 1.00
1,3-Dichlorobenzene U 0.110 1.00
1,4-Dichlorobenzene U 0.120 1.00
Dichlorodifluoromethane U 0.374 5.00
1,1-Dichloroethane U 0.100 1.00
1,2-Dichloroethane U 0.0819 1.00
1,1-Dichloroethene U 0.188 1.00
cis-1,2-Dichloroethene U 0.126 1.00
trans-1,2-Dichloroethene U 0.149 1.00
1,2-Dichloropropane U 0.149 1.00
1,1-Dichloropropene U 0.142 1.00
1,3-Dichloropropane U 0.110 1.00
2,2-Dichloropropane U 0.161 1.00
Di-isopropyl ether U 0.105 1.00
Ethylbenzene U 0.137 1.00
Hexachloro-1,3-butadiene U 0.337 1.00
Isopropylbenzene U 0.105 1.00
p-Isopropyltoluene U 0.120 1.00
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG2034400
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1599585-01,02,03,04,05,06,07,08
Method Blank (MB)
(MB) R3909572-5 04/02/23 14:45
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
2-Butanone (MEK)U 1.19 10.0
Methylene Chloride U 0.430 5.00
4-Methyl-2-pentanone (MIBK)U 0.478 10.0
Methyl tert-butyl ether U 0.101 1.00
Naphthalene U 1.00 5.00
n-Propylbenzene U 0.0993 1.00
Styrene U 0.118 1.00
1,1,1,2-Tetrachloroethane U 0.147 1.00
1,1,2,2-Tetrachloroethane U 0.133 1.00
Tetrachloroethene U 0.300 1.00
Toluene U 0.278 1.00
1,2,3-Trichlorobenzene U 0.230 1.00
1,2,4-Trichlorobenzene U 0.481 1.00
1,1,1-Trichloroethane U 0.149 1.00
1,1,2-Trichloroethane U 0.158 1.00
Trichloroethene U 0.190 1.00
Trichlorofluoromethane U 0.160 5.00
1,2,3-Trichloropropane U 0.237 2.50
1,2,4-Trimethylbenzene U 0.322 1.00
1,3,5-Trimethylbenzene U 0.104 1.00
Vinyl chloride U 0.234 1.00
o-Xylene U 0.174 1.00
m&p-Xylenes U 0.430 2.00
(S) Toluene-d8 112 80.0-120
(S) 4-Bromofluorobenzene 109 77.0-126
(S) 1,2-Dichloroethane-d4 109 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R3909572-1 04/02/23 12:59 • (LCSD) R3909572-2 04/02/23 13:20
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l %%%%%
Acetone 25.0 37.2 35.6 149 142 19.0-160 4.40 27
Acrolein 25.0 33.6 27.3 134 109 10.0-160 20.7 26
Acrylonitrile 25.0 35.1 33.2 140 133 55.0-149 5.56 20
Benzene 5.00 5.25 4.74 105 94.8 70.0-123 10.2 20
Bromobenzene 5.00 4.81 4.71 96.2 94.2 73.0-121 2.10 20
Bromodichloromethane 5.00 5.02 4.97 100 99.4 75.0-120 1.00 20
Bromoform 5.00 5.40 5.26 108 105 68.0-132 2.63 20
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG2034400
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1599585-01,02,03,04,05,06,07,08
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R3909572-1 04/02/23 12:59 • (LCSD) R3909572-2 04/02/23 13:20
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l %%%%%
Bromomethane 5.00 2.86 2.92 57.2 58.4 10.0-160 2.08 25
n-Butylbenzene 5.00 5.20 4.63 104 92.6 73.0-125 11.6 20
sec-Butylbenzene 5.00 5.42 4.99 108 99.8 75.0-125 8.26 20
tert-Butylbenzene 5.00 5.29 4.93 106 98.6 76.0-124 7.05 20
Carbon tetrachloride 5.00 5.43 5.28 109 106 68.0-126 2.80 20
Chlorobenzene 5.00 5.03 4.93 101 98.6 80.0-121 2.01 20
Chlorodibromomethane 5.00 5.09 4.92 102 98.4 77.0-125 3.40 20
Chloroethane 5.00 6.24 5.46 125 109 47.0-150 13.3 20
Chloroform 5.00 5.28 5.01 106 100 73.0-120 5.25 20
Chloromethane 5.00 4.49 3.90 89.8 78.0 41.0-142 14.1 20
2-Chlorotoluene 5.00 4.97 4.66 99.4 93.2 76.0-123 6.44 20
4-Chlorotoluene 5.00 4.89 4.73 97.8 94.6 75.0-122 3.33 20
1,2-Dibromo-3-Chloropropane 5.00 6.72 6.86 134 137 58.0-134 J4 2.06 20
1,2-Dibromoethane 5.00 5.58 5.27 112 105 80.0-122 5.71 20
Dibromomethane 5.00 5.28 5.10 106 102 80.0-120 3.47 20
1,2-Dichlorobenzene 5.00 4.79 4.76 95.8 95.2 79.0-121 0.628 20
1,3-Dichlorobenzene 5.00 4.92 4.69 98.4 93.8 79.0-120 4.79 20
1,4-Dichlorobenzene 5.00 5.09 4.90 102 98.0 79.0-120 3.80 20
Dichlorodifluoromethane 5.00 4.48 4.22 89.6 84.4 51.0-149 5.98 20
1,1-Dichloroethane 5.00 5.19 4.67 104 93.4 70.0-126 10.5 20
1,2-Dichloroethane 5.00 5.11 4.85 102 97.0 70.0-128 5.22 20
1,1-Dichloroethene 5.00 5.22 4.81 104 96.2 71.0-124 8.18 20
cis-1,2-Dichloroethene 5.00 5.09 4.86 102 97.2 73.0-120 4.62 20
trans-1,2-Dichloroethene 5.00 5.28 4.87 106 97.4 73.0-120 8.08 20
1,2-Dichloropropane 5.00 4.71 4.59 94.2 91.8 77.0-125 2.58 20
1,1-Dichloropropene 5.00 5.13 4.95 103 99.0 74.0-126 3.57 20
1,3-Dichloropropane 5.00 5.19 5.05 104 101 80.0-120 2.73 20
2,2-Dichloropropane 5.00 5.90 4.84 118 96.8 58.0-130 19.7 20
Di-isopropyl ether 5.00 4.65 4.39 93.0 87.8 58.0-138 5.75 20
Ethylbenzene 5.00 5.33 5.01 107 100 79.0-123 6.19 20
Hexachloro-1,3-butadiene 5.00 5.85 5.51 117 110 54.0-138 5.99 20
Isopropylbenzene 5.00 5.35 5.00 107 100 76.0-127 6.76 20
p-Isopropyltoluene 5.00 5.51 4.89 110 97.8 76.0-125 11.9 20
2-Butanone (MEK)25.0 37.7 36.5 151 146 44.0-160 3.23 20
Methylene Chloride 5.00 4.85 4.59 97.0 91.8 67.0-120 5.51 20
4-Methyl-2-pentanone (MIBK)25.0 34.6 33.9 138 136 68.0-142 2.04 20
Methyl tert-butyl ether 5.00 5.12 4.75 102 95.0 68.0-125 7.50 20
Naphthalene 5.00 5.92 5.65 118 113 54.0-135 4.67 20
n-Propylbenzene 5.00 5.40 4.81 108 96.2 77.0-124 11.6 20
Styrene 5.00 5.00 4.78 100 95.6 73.0-130 4.50 20
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG2034400
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1599585-01,02,03,04,05,06,07,08
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R3909572-1 04/02/23 12:59 • (LCSD) R3909572-2 04/02/23 13:20
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l %%%%%
1,1,1,2-Tetrachloroethane 5.00 5.01 4.95 100 99.0 75.0-125 1.20 20
1,1,2,2-Tetrachloroethane 5.00 5.65 5.21 113 104 65.0-130 8.10 20
Tetrachloroethene 5.00 5.28 5.06 106 101 72.0-132 4.26 20
Toluene 5.00 5.15 4.89 103 97.8 79.0-120 5.18 20
1,2,3-Trichlorobenzene 5.00 5.37 5.35 107 107 50.0-138 0.373 20
1,2,4-Trichlorobenzene 5.00 5.14 4.68 103 93.6 57.0-137 9.37 20
1,1,1-Trichloroethane 5.00 5.57 5.27 111 105 73.0-124 5.54 20
1,1,2-Trichloroethane 5.00 5.29 5.09 106 102 80.0-120 3.85 20
Trichloroethene 5.00 5.42 5.32 108 106 78.0-124 1.86 20
Trichlorofluoromethane 5.00 5.06 5.35 101 107 59.0-147 5.57 20
1,2,3-Trichloropropane 5.00 6.41 6.05 128 121 73.0-130 5.78 20
1,2,4-Trimethylbenzene 5.00 5.07 4.80 101 96.0 76.0-121 5.47 20
1,3,5-Trimethylbenzene 5.00 5.30 4.80 106 96.0 76.0-122 9.90 20
Vinyl chloride 5.00 5.45 5.01 109 100 67.0-131 8.41 20
o-Xylene 5.00 4.99 4.81 99.8 96.2 80.0-122 3.67 20
m&p-Xylenes 10.0 10.7 9.84 107 98.4 80.0-122 8.37 20
(S) Toluene-d8 108 111 80.0-120
(S) 4-Bromofluorobenzene 105 108 77.0-126
(S) 1,2-Dichloroethane-d4 111 109 70.0-130
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG2036693
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1599585-05,06
Method Blank (MB)
(MB) R3910216-2 04/05/23 20:59
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
Acetone U 11.3 50.0
Toluene U 0.278 1.00
(S) Toluene-d8 111 80.0-120
(S) 4-Bromofluorobenzene 101 77.0-126
(S) 1,2-Dichloroethane-d4 111 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R3910216-1 04/05/23 19:56 • (LCSD) R3910216-3 04/05/23 22:21
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l %%%%%
Acetone 25.0 22.5 21.6 90.0 86.4 19.0-160 4.08 27
Toluene 5.00 4.65 4.93 93.0 98.6 79.0-120 5.85 20
(S) Toluene-d8 105 103 80.0-120
(S) 4-Bromofluorobenzene 101 99.3 77.0-126
(S) 1,2-Dichloroethane-d4 108 105 70.0-130
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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GLOSSARY OF TERMS
Guide to Reading and Understanding Your Laboratory Report
The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not
intended as a comprehensive explanation, and if you have additional questions please contact your project representative.
Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name,
Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and
Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received.
Abbreviations and Definitions
MDL Method Detection Limit.
RDL Reported Detection Limit.
Rec.Recovery.
RPD Relative Percent Difference.
SDG Sample Delivery Group.
(S)
Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and
Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be
detected in all environmental media.
U Not detected at the Reporting Limit (or MDL where applicable).
Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes
reported.
Dilution
If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the
standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the
laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the
result reported has already been corrected for this factor.
Limits
These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal
for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or
duplicated within these ranges.
Qualifier
This column provides a letter and/or number designation that corresponds to additional information concerning the result
reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and
potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable.
Result
The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was
no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL”
(Below Detectable Levels). The information in the results column should always be accompanied by either an MDL
(Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect
or report for this analyte.
Uncertainty
(Radiochemistry)Confidence level of 2 sigma.
Case Narrative (Cn)
A brief discussion about the included sample results, including a discussion of any non-conformances to protocol
observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will
be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report.
Quality Control
Summary (Qc)
This section of the report includes the results of the laboratory quality control analyses required by procedure or
analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not
being performed on your samples typically, but on laboratory generated material.
Sample Chain of
Custody (Sc)
This is the document created in the field when your samples were initially collected. This is used to verify the time and
date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This
chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the
samples from the time of collection until delivery to the laboratory for analysis.
Sample Results (Sr)
This section of your report will provide the results of all testing performed on your samples. These results are provided
by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for
each sample will provide the name and method number for the analysis reported.
Sample Summary (Ss)This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and
times of preparation and/or analysis.
Qualifier Description
C4 The reported concentration is an estimate. The continuing calibration standard associated with this data responded low.
Data is likely to show a low bias concerning the result.
J The identification of the analyte is acceptable; the reported value is an estimate.
J4 The associated batch QC was outside the established quality control range for accuracy.
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122
Alabama 40660 Nebraska NE-OS-15-05
Alaska 17-026 Nevada TN000032021-1
Arizona AZ0612 New Hampshire 2975
Arkansas 88-0469 New Jersey–NELAP TN002
California 2932 New Mexico ¹TN00003
Colorado TN00003 New York 11742
Connecticut PH-0197 North Carolina Env375
Florida E87487 North Carolina ¹DW21704
Georgia NELAP North Carolina ³41
Georgia ¹923 North Dakota R-140
Idaho TN00003 Ohio–VAP CL0069
Illinois 200008 Oklahoma 9915
Indiana C-TN-01 Oregon TN200002
Iowa 364 Pennsylvania 68-02979
Kansas E-10277 Rhode Island LAO00356
Kentucky ¹ ⁶KY90010 South Carolina 84004002
Kentucky ²16 South Dakota n/a
Louisiana AI30792 Tennessee ¹ ⁴2006
Louisiana LA018 Texas T104704245-20-18
Maine TN00003 Texas ⁵LAB0152
Maryland 324 Utah TN000032021-11
Massachusetts M-TN003 Vermont VT2006
Michigan 9958 Virginia 110033
Minnesota 047-999-395 Washington C847
Mississippi TN00003 West Virginia 233
Missouri 340 Wisconsin 998093910
Montana CERT0086 Wyoming A2LA
A2LA – ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789
A2LA – ISO 17025 ⁵1461.02 DOD 1461.01
Canada 1461.01 USDA P330-15-00234
EPA–Crypto TN00003
ACCREDITATIONS & LOCATIONS

¹ Drinking Water ² Underground Storage Tanks ³ Aquatic Toxicity ⁴ Chemical/Microbiological ⁵ Mold ⁶ Wastewater n/a Accreditation not applicable
* Not all certifications held by the laboratory are applicable to the results reported in the attached report.
* Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace Analytical.
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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