WS-4459_14449_CA_MRP_20241024

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

October 24, 2024

Mr. Gene Mao
Guilford County Environmental Health
400 West Market Street, Suite 300
Greensboro, North Carolina 27401

Subject: Groundwater Monitoring Report
Former Conoco Store #33074 (RM #6177)
34302 High Point Road
Greensboro, Guilford County, North Carolina
NCDEQ Incident No. 14449
ATC Project No.: P666177040

Dear Mr. Mao:

ATC Associates of North Carolina, P.C. (ATC), on behalf of Phillips 66 Company is submitting the enclosed
Groundwater Monitoring Report for the Former Conoco Store #33074. The report presents investigative
procedures, field activities, and laboratory analytical results for a groundwater-sampling event conducted in
August 2024.

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

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

Luke Campbell Gabriel Araos, P.E.
Staff Scientist Branch Manager
Direct Line: 919-227-3346 Direct Line: 919-573-1205
Email: [e-mail] Email: [e-mail]

Attachments:
1. Groundwater Monitoring Report

cc: Mr. Ed Kuhn, Contract Program Manager for Phillips 66 Company

Prepared for:

Phillips 66 Company
222 S. Church Street
Charlotte, North Carolina 28202

GROUNDWATER MONITORING REPORT
FORMER CONOCO STORE #33074 (RM #6177)
4302 HIGH POINT ROAD
GREENSBORO, GUILFORD COUNTY, NORTH CAROLINA

ATC Project No. P666177040

Prepared by:

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

Luke Campbell
Staff Scientist
Direct Line: 919-227-3346
Email: [e-mail]

Gabriel Araos, P.E.
Branch Manager
Direct Line: 919-573-1205
Email: [e-mail]

October 24, 2024

Former Conoco Store #33074 (RM #6177)
October 24, 2024
Page i

ATC Project No. P666177040 Phillips 66 Company
Table of Contents
1.0 SITE IDENTIFICATION .......................................................................................................................... 1
2.0 EXECUTIVE SUMMARY ........................................................................................................................ 2
3.0 INTRODUCTION ..................................................................................................................................... 3
4.0 BACKGROUND INFORMATION .......................................................................................................... 3
5.0 GROUNDWATER CHARACTERIZATION ........................................................................................... 5
5.1 GROUNDWATER LEVELS...................................................................................................................................... 5
5.2 GROUNDWATER QUALITY ................................................................................................................................... 5
6.0 CONCLUSIONS AND RECOMMENDATIONS .................................................................................... 6

TABLES:
Table 1 – Groundwater Elevation Data
Table 2 – Groundwater Analytical Results
Table 3 – Historical Groundwater Analytical Results

FIGURES:
Figure 1 – Site Topographic Map
Figure 2 – Site Map
Figure 3 – Groundwater Elevation Contour Map
Figure 4 – Dissolved Benzene Isoconcentration Contour Map
Figure 5 – Other Chemicals of Concern in Groundwater
Figure 6 – Concentrations vs Time Graphs

APPENDICES:
Appendix A – Laboratory Analytical Results
Former Conoco Store #33074 (RM #6177)
October 24, 2024
Page 2 of 7

ATC Project No. P666177040 Phillips 66 Company
2.0 EXECUTIVE SUMMARY

ATC Associates of North Carolina, P.C. (ATC) has completed a Groundwater Monitoring Report for the
Former Conoco Store #33074. This report documents the groundwater sampling activities conducted at the
site in August 2024.

The former Conoco Store #33074 is located at 4032 High Point Road in Greensboro, Guilford County, North
Carolina. The site is developed with one single-story convenience store building and fuel island canopy.
The site currently operates as Quick Food Mart service station and is owned by Sam’s Mart, LLC. Four
USTs are currently active at the site, three 10,000-gallon gasoline USTs and one 3,000-gallon kerosene
UST. Eight monitoring wells (MW-1 through MW-7, and MW-1D) are associated with the incident at the site.

On August 20, 2024, ATC personnel mobilized to the site to collect groundwater samples from MW-1, MW-
1D, MW-2, MW-3, MW-4, MW-5, MW-6, and MW-7. Light non-aqueous phase liquid (LNAPL) was not
detected during the event. Chemicals of concern (COCs) were detected above the Title 15A NCAC 02L
.0202 Groundwater Quality Standards (2L Standards) in wells MW-1, MW-1D, MW-2, MW-5, MW-6, and
MW-7. Benzene was detected above the Gross Contamination Level (GCL) in monitoring well MW-5.
Monitoring well MW-3 did not exhibit COCs exceeding applicable 2L Standards.

Overall, the petroleum impacted plume remains stable. The total benzene, toluene, ethylbenzene, and total
xylenes (BTEX) concentration in well MW-5 has increased since the previous sampling event which was
conducted in October 2023. The benzene concentration in well MW-5 continues to exceed the
corresponding GCL. In addition, the continual presence of oxygenates in groundwater samples may be
indicative of a new release from the current operations. ATC recommends the continuation of air sparge
(AS) enhanced aggressive fluid vapor recovery (AFVR) events to further reduce dissolved constituent
concentrations at the site. Additionally, ATC recommends the installation of an additional air sparge well
near MW-5 to facilitate the reduction of the GCLs.
Former Conoco Store #33074 (RM #6177)
October 24, 2024
Page 3 of 7

ATC Project No. P666177040 Phillips 66 Company
3.0 INTRODUCTION

ATC Associates of North Carolina, P.C. (ATC) was retained by Phillips 66 Company to conduct site
monitoring activities at Former Conoco Store #33074 (Incident No. 14449). The site is located at 4302 High
Point Road in Greensboro, Guilford County, North Carolina. The site currently operates as a Quick Food
Mart service station and is owned by Sam’s Mart, LLC. A site topographic map is presented as Figure 1
and a site map is presented as Figure 2.

4.0 BACKGROUND INFORMATION

On October 3, 1990, Du Pont Environmental Remediation Services, Inc. (Du Pont) submitted an
Underground Storage Tank Removal Report. The report documented the removal of three 12,000-gallon
and one 6,000-gallon underground storage tanks (USTs). Based on laboratory analytical data, Du Pont
concluded all contaminated soils had been removed from the site and no further action was necessary.

In August 1990, three 10,000-gallon gasoline USTs and one 3,000-gallon kerosene UST were installed at
the site.

Brown and Root Environmental (Brown & Root) submitted a Preliminary Site Assessment (PSA) on July
21, 1995, in response to a petroleum release discovered on July 12, 1995. During the PSA, seven soil
borings were advanced. The soil samples indicated the soil had been impacted by the release above North
Carolina Standards. The activities were also documented in an Initial Abatement Measures and Site Check
Report submitted by Brown & Root on October 3, 1995.

TetraTech NUS (TetraTech) installed monitoring well MW-1 on February 10, 1999, during Phase I Limited
Site Assessment (LSA) activities. TetraTech also conducted a receptor survey and reported no water supply
wells were located within 1,000 feet of the site and no surface water bodies were found within 500 feet of
the site. Based on laboratory results, TetraTech requested no further action based on the LSA investigation.

On May 12, 1999, TetraTech submitted a Preliminary Exposure Pathway Assessment Report (PEPA) to
Conoco, Inc. Based on the PEPA Report; no receptors were identified within 1,000 feet of the site.
On August 12, 1999, the Guilford County Department of Public Health requested the installation of a
monitoring well in the vicinity of the dispensers on the east side of the site due to elevated benzene, toluene,
ethylbenzene, and xylenes (BTEX) concentrations. A Phase I LSA Supplement Report was submitted by
DAHL and Associates, Inc. (DAHL) on January 11, 2000. The report indicated that due to benzene
exceeding the Gross Contamination Levels (GCLs), the site should be classified as an intermediate risk.

On January 28, 2000, the North Carolina Department of Environmental Quality (NCDEQ, formerly the North
Carolina Department of Environment and Natural Resources) issued a Notice of Report Receipt (NORR)
requesting the preparation of a Comprehensive Site Assessment (CSA); however, prior to the CSA, DAHL
completed Phase II LSA activities at the site which included the installation of two shallow monitoring wells
(MW-3 and MW-4) and a deep monitoring well (MW-1D). A Phase II LSA was submitted to NCDEQ on June
29, 2000.

In September 2000, EPOCH Environmental Group, LLC (EPOCH) purchased DAHL and continued with
site investigation activities. On May 15, 2002, EPOCH submitted a CSA, which included the advancement
of MW-5, MW-6, and MW-7. Based on the analytical results from the CSA no COCs were detected in the
soil samples above the Residential Maximum Soil Contaminant Concentrations (MSCCs). Groundwater
analytical results indicated BTEX, methyl tertiary butyl ether (MTBE), and naphthalene above the NCDEQ
2L Standards.

In September 2003, ATC was retained by ConocoPhillips to continue environmental assessment and
remediation services at the site. ATC submitted a Groundwater Sampling Report on July 6, 2005.
Laboratory results indicated benzene exceeded GCLs in monitoring wells MW-2 and MW-5.

Former Conoco Store #33074 (RM #6177)
October 24, 2024
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ATC Project No. P666177040 Phillips 66 Company
In April 2011, ATC was awarded the ConocoPhillips contract to continue groundwater monitoring activities
at the site. On May 1, 2012, ConocoPhillips separated into two companies, ConocoPhillips and Phillips 66
Company. Phillips 66 Company manages the environmental activities associated with this site.

In May 2012, a receptor survey was conducted by ATC during a groundwater sampling event. Based on
ATC’s findings, it appears there are no water supply wells or surface water bodies within 1,000 feet of the
site. A Monitoring Report documenting the survey was submitted on July 12, 2012.

ATC performed aggressive fluid vapor recovery (AFVR) events at the site in January 2013, February 2013,
and March 2013, in order to reduce contaminant concentrations in groundwater. A sampling event was
conducted in April 2013. Based on the analytical results, the AFVR events were effective in reducing
concentrations in groundwater. A Groundwater Monitoring Report was submitted on June 26, 2013,
documenting the AFVR events and sampling event.

On July 25, 2013, Greensboro Water Department (GWD) officials noted high lower explosive limit (LEL)
levels in a sewer manhole near the site. Subsequent investigations identified light non-aqueous phase liquid
(LNAPL) in an abandoned sewer lateral near the northeast portion of the site. The sewer lateral was
disconnected from the sewer main on July 30, 2013, and was capped on August 7, 2013, by GWD
personnel. The current UST operator submitted a 24-hour Release and UST Leak Reporting Form (UST-
61) to NCDEQ on July 26, 2013.

On July 27, 2013, a Tank and Line Tightness Test identified a leak in the regular gasoline product line. The
product line was repaired and passed a subsequent line test on August 16, 2013. On August 13, 2013,
NCDEQ issued a NORR to Sam’s Mart requesting the preparation of a Site Check Report. On January 14,
2014, a Site Check Report was submitted to NCDEQ by Groundwater Environmental Services, Inc. (GES)
documenting the results of the investigation. Soil laboratory analytical results indicated that total petroleum
hydrocarbons (TPH) gasoline range organics (GRO), TPH diesel range organics (DRO), benzene, toluene,
xylenes and methylene chloride exceeded their respective Soil-to-Groundwater MSCCs. Groundwater
analytical results from newly installed monitoring well SM-MW-1 indicated petroleum constituents above
the 2L Standard but below the GCLs. LNAPL was not detected during the investigation.

ATC performed AFVR events at the site in January 2015 and March 2015 in order to reduce contaminant
concentrations in groundwater. A sampling event was conducted in April 2015. Based on the analytical
results, the AFVR events were effective in reducing concentrations in groundwater. A Groundwater
Monitoring Report was submitted on July 14, 2015, documenting the AFVR events and sampling event.

ATC performed a groundwater sampling event on October 6, 2016. Groundwater analytical results indicated
numerous petroleum compounds exceeded 2L Standards. Additionally, benzene concentrations exceeded
the GCL in MW-5. A Groundwater Monitoring Report was submitted on January 25, 2017, documenting the
sampling event.

ATC performed four AFVR events at the site in December 2016, January 2017, February 2017, and April
2017, and a groundwater sampling event was conducted in May 2017. Based on the analytical results, the
AFVR events were effective in reducing concentrations in groundwater. A Groundwater Monitoring Report
was submitted on June 22, 2017, documenting the AFVR events and sampling event.

On March 6, 2018, ATC submitted a report documenting the installation of two air sparge wells (AS-1 and
AS-2), four air sparge-enhanced AFVR events conducted on August 31, 2017, September 28, 2017,
November 2, 2017, and November 30, 2017, and the groundwater sampling event conducted in December
2017.

On January 3, 2019, ATC submitted a report documenting the results of an air sparge-enhanced AFVR
event conducted on July 10, 2018, and the groundwater sampling event conducted in September 2018.

Former Conoco Store #33074 (RM #6177)
October 24, 2024
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ATC Project No. P666177040 Phillips 66 Company
On July 29, 2019, ATC submitted a report documenting the results of air sparge-enhanced AFVR events
conducted on March 6, 2019, April 18, 2019, and May 30, 2019, and the groundwater sampling event
conducted in June 2019.

On January 30, 2020, ATC submitted a report documenting the results of an air sparge-enhanced AFVR
event conducted on August 14, 2019, and the groundwater sampling event conducted in December 2019.
The enhanced air sparge AFVR events have been successful in reducing the benzene concentrations in
MW-2 and in MW-5.

On April 23, 2020, ATC submitted a report documenting the results of a groundwater sampling event
conducted in March 2020. Laboratory analysis indicated that the benzene concentrations rebounded in
MW-5 above the GCLs.

On September 2, 2020, ATC submitted a report documenting the results of a groundwater sampling event
conducted in June 2020. Laboratory analysis indicated that the benzene concentrations exceeded GCLs,
but the impacted plume is stable.

On March 11, 2021, ATC submitted a report documenting the results of a groundwater sampling event
conducted in December 2020. Overall, petroleum impacted plume is stable; however, the VOC
concentrations in MW-5 have increased since the previous sampling event.

On October 12, 2021, ATC submitted a report documenting the results of a groundwater sampling event
conducted in July 2021. Overall, petroleum impacted plume is stable; however, the VOC concentrations in
MW-5 have increased since the previous sampling event.

On April 12, 2022, ATC submitted a report documenting the results of a groundwater sampling event
conducted in February 2022. Overall, the petroleum-impacted groundwater plume remains stable. The
results of the sampling event indicated that VOC concentrations in MW-5 had decreased since the previous
sampling event. However, the benzene concentration in MW-5 continued to exceed the applicable GCL.

On December 5, 2023, ATC submitted a report documenting the results of a groundwater sampling event
conducted in October 2023. Overall, the petroleum-impacted groundwater plume remains stable. The
results of the sampling event indicated that the total BTEX concentration in MW-5 had increased slightly
since the previous sampling event. The benzene concentration in MW-5 continued to exceed the applicable
GCL.

This report documents the groundwater sampling event conducted in August 2024.

5.0 GROUNDWATER CHARACTERIZATION

5.1 GROUNDWATER LEVELS

On August 20, 2024, groundwater levels were measured in monitoring wells MW-1, MW-1D, MW-2, MW-
3, MW-5, MW-6, and MW-7. MW-4 was unable to be measured due to a food truck blocking access to the
well vault. Depth to water was measured from the top of each well casing. Monitoring well construction
details are included in Table 1. The depth to groundwater from ground surface across the site varied from
7.05 feet in MW-1 to 11.76 feet in MW-5. Groundwater elevations for the sampling event are listed in Table
1. Figure 3 presents the groundwater elevation contour map. As shown in Figure 3, inferred groundwater
flow within the surficial aquifer is to the south which is consistent with the historical groundwater flow pattern.

5.2 GROUNDWATER QUALITY

Prior to sampling, a minimum of three well volumes of groundwater were removed from each monitoring
well. A dedicated disposable one-liter plastic bailer was used to obtain each groundwater sample. The
Former Conoco Store #33074 (RM #6177)
October 24, 2024
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ATC Project No. P666177040 Phillips 66 Company
samples were then placed in an appropriate container, properly labeled, and preserved on ice. The samples
were transported under chain of custody to SGS North America Inc. in Scott, Louisiana and were analyzed
for volatile organic compounds including ethanol and oxygenates by EPA Method 6200B. Oxygenates were
analyzed due to the active UST system and to monitor for potential trends.

The laboratory analytical report for the August 2024 sampling event indicated the following chemical
compounds exceeded the corresponding 2L Standards:

 Benzene: MW-1, MW-2, MW-5, and MW-6;
 Toluene: MW-2 and MW-5;
 Ethylbenzene: MW-2 and MW-5;
 Total Xylenes: MW-2 and MW-5;
 MTBE: MW-1D, MW-2, and MW-5;
 Naphthalene: MW-2, MW-5, and MW-6;
 1,2-Dichloroethane: MW-7;
 Di-isopropyl ether: MW-5;
 Isopropylbenzene: MW-2 and MW-5;
 Methylene chloride: MW-2 and MW-5;
 n-Propylbenzene: MW-2 and MW-5;
 Tert-Amyl Alcohol: MW-1, MW-1D, MW-2 and MW-5;
 Tert-Butyl Alcohol: MW-1, MW-1D, MW-5, and MW-7;
 1,2,3-Trichloropropane: MW-6;
 1,2,4-Trimethylbenzene: MW-2 and MW-5; and
 1,3,5-Trimethylbenzene: MW-2 and MW-5.

Monitoring well MW-5 exceeded the GCL for benzene during this sampling event. The laboratory analytical
results for the August 2024 sampling event are summarized in Table 2. Historical groundwater analytical
results are summarized in Table 3. The oxygenate concentrations in the shallow groundwater monitoring
wells are mostly consistent with results from previous sampling events. The continual presence of the
oxygenates may be indicative of a new release from the current operations. An isoconcentration contour
map for dissolved benzene is included as Figure 4. Other COCs in groundwater are shown in Figure 5.
Concentration versus time graphs are included as Figure 6. The laboratory report is included in Appendix
A.

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. The chain of custody was properly completed by all parties. Refer to the laboratory report in
Appendix A 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.

6.0 CONCLUSIONS AND RECOMMENDATIONS

ATC has performed a groundwater sampling event at the Former Conoco Store #33074 Greensboro, North
Carolina. Based on field activities, observations, and groundwater analytical results, ATC concludes the
following:

 The groundwater flow direction at the site is inferred to flow to the south within the surficial aquifer;
 The groundwater analytical results indicated 16 COCs exceeded 2L Standards;
 Benzene exceeded the GCL in well MW-5; and
 Tert-Amyl Alcohol and Tert-Butyl Alcohol were detected above the 2L Standard in deep monitoring well
MW-1D.

Former Conoco Store #33074 (RM #6177)
October 24, 2024
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ATC Project No. P666177040 Phillips 66 Company
Overall, the petroleum impacted plume remains stable. BTEX concentrations in well MW-5 have increased
since the previous sampling event which was conducted in October 2023. The benzene concentration in
well MW-5 continues to exceed the corresponding GCL. In addition, the continual presence of oxygenates
in groundwater samples may be indicative of a new release from the current operations. ATC recommends
the continuation of air sparge (AS) enhanced aggressive fluid vapor recovery (AFVR) events to further
reduce dissolved constituent concentrations at the site. Additionally, ATC recommends the installation of
an additional air sparge well near MW-5 to facilitate the reduction of the GCLs.

Former Conoco Store #33074 (RM #6177)

ATC Project No. P666177040 Phillips 66 Company
TABLES
TABLE 1
GROUNDWATER ELEVATION DATA
FORMER CONOCO STORE #33074 (RM #6177)
4302 HIGH POINT ROAD
GREENSBORO, NORTH CAROLINA
ATC PROJECT NO. P666177040
Monitoring
Well Date Collected
TOC
Elevation
(feet)
Well Depth
(feet)
Screened
Interval
(feet)
Depth to
LNAPL
(feet btoc)
Depth to
Water
(feet btoc)
Water Table
Elevation
(feet)
MW-1 08/20/24 99.40 22.5 12.5-22.5 ND 7.05 92.35
MW-1D 08/20/24 100.00 37 34-37 ND 10.50 89.50
MW-2 08/20/24 100.23 25 15-25 ND 9.77 90.46
MW-3 08/20/24 100.40 20 5-20 ND 11.04 89.36
MW-4 08/20/24 99.08 20 5-20 ND NS NS
MW-5 08/20/24 100.76 20 5-20 ND 11.76 89.00
MW-6 08/20/24 100.34 20 5-20 ND 8.44 91.90
MW-7 08/20/24 94.19 21 5-21 ND 10.52 83.67
Notes:
1. TOC = Top of Casing.
2. Depth to groundwater measured from TOC.
3. Elevations are referenced to arbitrary reference point of 100 feet at MW-1D.
4. btoc = below top of casing.
5. ND = Not Detected.
6. NS = Not Sampled.
7. LNAPL = Light Non-Aqueous Phase Liquid.
Page 1 of 1
TABLE 2
GROUNDWATER ANALYTICAL RESULTS
FORMER CONOCO STORE #33074 (RM #6177)
4302 HIGH POINT ROAD
GREENSBORO, NORTH CAROLINA
ATC PROJECT NO. P666177040
Sample ID Contaminant
of Concern
Date Collected
MW-1 8/20/2024 1.2 < 0.50 < 0.50 < 0.50 1.2 0.68 < 0.50 < 0.20 1.2 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50 63.6 < 1.0 54.3 < 0.50 < 0.50 < 0.50 < 0.50 < 10
MW-1D 8/20/2024 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50 20.7 < 0.50 < 0.20 2.2 1.2 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50 303 0.42 J 410 < 0.50 < 0.50 < 0.50 < 0.50 < 10
MW-2 8/20/2024 1,510 3,800 2,480 10,400 18,190 20.2 J 765 < 10 < 25 < 25 76.0 < 25 134 231 59.2 3,740 < 50 < 500 < 25 1,850 463 < 25 312 J
MW-3 8/20/2024 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50 < 0.20 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50 < 25 < 1.0 < 10 < 0.50 < 0.50 < 0.50 < 0.50 < 10
MW-4 8/20/2024 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS
MW-5 8/20/2024 17,600 29,100 2,840 14,500 64,040 1,540 758 < 40 280 < 100 123 < 100 47.1 J 388 63.3 J 18,600 < 200 3,270 < 100 2,900 767 < 100 < 2,000
MW-6 8/20/2024 9.4 25.5 59.5 126 220.4 < 0.50 28.3 < 0.20 < 0.50 < 0.50 6.3 0.66 < 0.50 19.8 0.28 J < 25 < 1.0 < 10 1.1 85.4 18.6 1.8 32.5
MW-7 8/20/2024 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50 7.9 0.27 J 0.62 18.7 < 0.50 0.19 J < 0.50 < 0.50 < 0.50 < 0.50 13.2 J < 1.0 55.1 < 0.50 < 0.50 < 0.50 1.4 < 10
1 600 600 500 NE 20 6 0.4 70 47 70 25 5 70 70 40 128 10 0.005 400 400 88 6,000
5,000 260,000 80,000 50,000 NE 20,000 6,000 400 70,000 47,000 30,500 11,700 5,000 26,100 70,000 40,000 128,000 10,000 NE 28,500 24,100 88,000 6,000,000
Notes:
1. "<" or ND = Not detected at or above the reporting limit.
2. Concentrations are reported in micrograms per liter (μg/l) = parts per million.
3. Concentrations in bold print equal or exceed the NCDEQ 2L Standard (2L Standard) effective April 2022.
4. Concentrations in bold itialics equal or exceed the NCDEQ Gross Contamination Levels (GCL) for Groundwater.
5. 2L = 15A NCAC 02L .0202 Groundwater Standards.
6. BTEX = Benzene, Toluene, Ethylbenzene, and Total Xylenes.
7. GCL = Gross Contaminantion Level.
8. J = Estimated concentration above laboratory detection limits but below laboratory reporting limit.
9. NE = Not Established.
10. NS = Not Sampled.
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Page 1 of 1
TABLE 3
HISTORICAL GROUNDWATER ANALYTICAL RESULTS
FORMER CONOCO STORE#33074 (RM #6177)
4302 HIGH POINT ROAD
GREENSBORO, NORTH CAROLINA
ATC PROJECT NO. P666177040
TAA TAME TBA
2/11/1999 3 4 <1 1 8 176 NA NA NA NA
5/30/2000 <1 <1 <1 <1 ND 190 NA NA NA 23
9/13/2001 3,300 220 250 530 4,300 8,300 NA NA NA NA
3/20/2002 1700 54 380 67 2,201 8,200 NA NA NA NA
5/5/2005 8 <2 7 <2 15 2,470 NA NA NA 8
5/16/2012 <0.50 <0.50 <0.50 <0.50 ND 8.6 NA NA NA 0.8
4/11/2013 0.9 <0.50 0.1J 0.2J 1.2 17 NA NA NA 0.5
2/19/2014 13 0.1J 0.6 1 14.4 18 NA NA NA <0.1
7/31/2014 1.6 <0.1 0.3J 0.5J 2.4 31 NA NA NA 0.7
4/23/2015 0.5 <0.1 0.1J <0.2 0.6 31 NA NA NA 0.2J
10/6/2016 1 0.23 0.49 <0.6 1.72 7.3 NA NA NA 1.7
5/3/2017 1.9 0.20 J 0.28 J 0.13 J 2.51 4.4 NA NA NA 4.4
12/28/2017 0.51 <0.50 <0.50 <0.50 0.51 2.4 NA NA NA 4.4
9/10/2018 0.52 <0.50 <0.50 <0.50 0.52 2.5 NA NA NA 2.2
6/21/2019 <0.50 <0.50 <0.50 <0.50 ND 4.2 NA NA NA <0.50
12/11/2019 1.3 <0.50 <0.50 <0.50 1.3 0.84 NA NA NA 0.91
3/9/2020 2.4 <0.50 <0.50 <0.50 2.4 3.5 NA NA NA 1.1
6/18/2020 <0.50 <0.50 <0.50 <0.50 ND 2.7 206 <1.0 258 <0.50
12/8/2020 <0.50 <0.50 <0.50 <0.50 ND 1.9 58.2 <1.0 150 <0.50
7/20/2021 0.93 <0.50 <0.50 <0.50 0.93 0.81 44.8 <1.0 87.1 0.64
2/9/2022 1.3 <0.50 <0.50 <0.50 1.3 0.56 32.7 <1.0 68.6 0.35 J
10/2/2023 0.90 <0.50 <0.50 <0.50 0.90 0.36 J 35.9 <1.0 <10 <0.50
8/20/2024 1.2 < 0.50 < 0.50 < 0.50 1.2 0.68 63.6 <1.0 54.3 < 0.50
5/30/2000 51 <20 <20 <20 51 1,800 NA NA NA NA
9/13/2001 <5 <5 <5 <5 ND 1,200 NA NA NA <10
3/20/2002 <2.5 <2.5 <2.5 <2.5 ND 1,400 NA NA NA NA
5/5/2005 <1 <2 <2 <2 ND 2,140 NA NA NA <3
5/16/2012 <25 <25 <25 <25 ND 2,600 NA NA NA <25
4/11/2013 <25 <25 <25 6.7J 6.7 6,900 NA NA NA <25
2/19/2014 <5 <5 <5 <5 ND 3,800 NA NA NA <5
7/31/2014 <5 <5 <5 <10 ND 3,200 NA NA NA <5
4/23/2015 <2.0 <2.0 <2.0 <4.0 ND 1,700 NA NA NA <2.0
10/6/2016 <3.0 <2.0 <2.0 <6.0 ND 850 NA NA NA < 5.0
5/3/2017 <0.50 <0.50 <0.50 <1.5 ND 382 NA NA NA <0.50
12/28/2017 <0.50 <0.50 <0.50 <0.50 ND 193 NA NA NA 0.85
9/10/2018 <0.50 <0.50 <0.50 <0.50 ND 59.6 NA NA NA <0.50
6/21/2019 <0.50 <0.50 <0.50 <0.50 ND 45.0 NA NA NA <0.50
12/11/2019 <0.50 <0.50 <0.50 <0.50 ND 28.1 NA NA NA <0.50
3/9/2020 <0.50 <0.50 <0.50 <0.50 ND 35.5 NA NA NA <0.50
6/18/2020 <0.50 <0.50 <0.50 <0.50 ND 17.4 <25 <1.0 <10 <0.50
12/8/2020 <0.50 <0.50 <0.50 <0.50 ND 12 <25 <1.0 <10 <0.50
7/20/2021 <0.50 <0.50 <0.50 <0.50 ND 14.0 496 <1.0 537 <0.50
2/9/2022 <0.50 <0.50 <0.50 <0.50 ND 19.6 450 0.48 J 504 <0.50
10/2/2023 <0.50 <0.50 <0.50 <0.50 <0.50 19.1 <25 0.38 J <10 <0.50
8/20/2024 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50 20.7 303 0.42 J 410 < 0.50
10/27/1999 20,000 23,000 1,800 7,200 52,000 1,500 NA NA NA NA
5/30/2000 31,000 39,000 2,400 12,000 84,400 2,200 NA NA NA <10
9/13/2001 25,000 37,000 2,300 1,600 65,900 1,100 NA NA NA NA
3/20/2002 28,000 37,000 1,800 8,300 75,100 <2,500 NA NA NA NA
5/5/2005 17,000 34,000 1,900 8,900 61,800 <200 NA NA NA 530
5/16/2012 13,000 44,000 3,300 16,100 76,400 81J NA NA NA 930
4/11/2013 9,000 35,000 2,900 14,600 61,500 98J NA NA NA 860
2/19/2014 8,200 33,000 2,900 13,600 57,700 93J NA NA NA 750
7/31/2014 7,100 27,000 2,800 13,600 50,500 110 NA NA NA 670
4/23/2015 6,600 24,000 2,900 14,600 48,100 75J NA NA NA 800
10/6/2016 4,400 9,130 2,080 10,300 25,910 46.8 NA NA NA 723
5/3/2017 3,540 8,210 1,990 12,100 25,840 124 NA NA NA 1,130
12/28/2017 4,870 9,480 2,480 15,000 31,830 <10 NA NA NA 1,220
3/27/2018 4,930 8,180 2,940 14,300 30,350 54.4 NA NA NA 1,160
9/10/2018 3,270 7,790 2,230 11,800 25,090 <50 NA NA NA 1,020
6/21/2019 4,240 5,620 2,670 14,500 27,030 <50 NA NA NA 877
12/11/2019 <0.50 <0.50 <0.50 <0.50 ND <0.50 NA NA NA <0.50
3/9/2020 3,090 4,330 2,560 12,500 22,480 <50 NA NA NA 1,070
6/18/2020 3,160 4,300 2,680 13,000 23,140 38.3 5,070 <50 <500 984
12/8/2020 4,000 3,060 2,470 13,300 22,830 <50 4,060 <100 <1,000 759
7/20/2021 2,670 5,350 2,980 14,200 25,200 <50 2,820 <100 <1,000 786
2/9/2022 2,570 2,610 2,830 10,900 18,910 <25 <1,300 <50 <500 681
10/2/2023 1,820 4,600 2,860 12,300 21,580 16.4 J 2,480 <50 <500 915
8/20/2024 1,510 3,800 2,480 10,400 18,190 20.2 J 3,740 <50 <500 765
NCDEQ 2L Standard 1 600 600 500 NE 20 40 128 10 6
5,000 260,000 80,000 50,000 NE 20,000 40,000 128,000 10,000 6,000
Notes:
1. "<" or ND = Not Detected at or above the laboratory reporting limit.
2. Concentrations are reported in micrograms per liter (μg/l) = parts per million.
3. Concentrations in bold print equal or exceed the corresponding NCDEQ 15A NCAC 2L .0202 Groundwater Quality 2L Standard (2L Standard).
4. Concentrations in bold italics equal or exceed the corresponding NCDEQ Gross Contamination Levels (GCL) for Groundwater.
6. BTEX = Benzene, toluene, ethylbenzene, xylenes.
7. GCL = Gross Contaminant Level.
8. J = Indicates consituent was detected above laboratory detection limits but below laboratory reporting limit.
9. MTBE = Methyl Tert Butyl Ether.
10. TAME = Tert-Amyl Methyl Ether.
11. TBA = Tert-Butyl Alcohol.
12. TAA = Tert-Amyl Alcohol.
13. NE = Not Established.
MW-1D
MW-2
Benzene Toluene MTBETotal BTEX NaphthaleneMonitoring
Well
MW-1
Ethylbenzene Total
Xylenes
GCL
Sampling
Date
Page 1 of 3
TABLE 3
HISTORICAL GROUNDWATER ANALYTICAL RESULTS
FORMER CONOCO STORE#33074 (RM #6177)
4302 HIGH POINT ROAD
GREENSBORO, NORTH CAROLINA
ATC PROJECT NO. P666177040
TAA TAME TBA
5/2/2000 <1 <1 <1 <1 ND <5 NA NA NA <1
9/13/2001 7.6 <5 <5 <5 7.6 <5 NA NA NA NA
3/20/2002 <1 <1 <1 <1 ND <5 NA NA NA NA
5/5/2005 <0.50 <0.7 <0.8 <0.8 ND <2 NA NA NA <1
5/16/2012 <0.50 <0.50 <0.50 <0.50 ND 0.1J NA NA NA <0.50
4/11/2013 <0.50 <0.50 <0.50 <0.50 ND 0.1J NA NA NA <0.50
2/19/2014 <0.1 <0.1 <0.1 <0.1 ND 0.1J NA NA NA <0.1
7/31/2014 <0.1 <0.1 <0.1 <0.2 ND 0.2J NA NA NA <0.1
4/23/2015 <0.1 <0.1 <0.1 <0.2 ND 0.1J NA NA NA <0.1
10/6/2016 <0.3 <0.2 <0.2 <0.6 ND <0.2 NA NA NA <0.50
5/3/2017 <0.50 <0.50 <0.50 <1.5 ND <0.50 NA NA NA <0.50
12/28/2017 <0.50 <0.50 <0.50 <0.50 ND <0.50 NA NA NA <0.50
9/10/2018 <0.50 <0.50 <0.50 <0.50 ND <0.50 NA NA NA <0.50
6/21/2019 <0.50 <0.50 <0.50 <0.50 ND <0.50 NA NA NA <0.50
12/11/2019 <0.50 <0.50 <0.50 <0.50 ND 1.8 NA NA NA 0.94
3/9/2020 <0.50 <0.50 <0.50 <0.50 ND <0.50 NA NA NA 0.67
6/18/2020 <0.50 <0.50 <0.50 <0.50 ND <0.50 <25 <1.0 <10 <0.50
12/8/2020
7/20/2021 <0.50 <0.50 <0.52 <0.53 ND <0.50 <25 <1.0 <10 <0.50
2/9/2022 <0.50 <0.50 <0.50 <0.50 ND <0.50 <25 <1.0 <10 <0.50
10/2/2023 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <25 <1.0 <10 0.38 J
8/20/2024 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50 <25 <1.0 <10 < 0.50
5/2/2000 29 <8 46 <8 75 590 NA NA NA <50
9/13/2001 12 6.7 21 <5 39.7 540 NA NA NA NA
3/20/2002 2.5 <1 2.2 <1 4.7 490 NA NA NA NA
5/5/2005 46 0.9 19 <0.8 65.9 375 NA NA NA 110
5/16/2012 4.5 <0.50 0.4J 0.1J 5 32 NA NA NA 1.2
4/11/2013 5 0.2J 0.3J 0.4J 5.9 23 NA NA NA 0.9
2/19/2014 170 25 35 114 344 11 NA NA NA 12
7/31/2014 15 <0.1 0.3J 0.2J 15.5 16 NA NA NA 1.2
4/23/2015 17 <0.1 1.3 0.1J 18.4 11 NA NA NA 0.5J
10/6/2016 0.63 <0.2 <0.2 <0.6 0.63 5.7 NA NA NA <0.50
5/3/2017 2.5 0.16 J 5.7 0.98 J 9.34 3.6 NA NA NA 10.4
12/28/2017 <0.50 <0.50 <0.50 <0.50 ND 2 NA NA NA <0.50
3/27/2018 2.6 <0.50 10.8 2.6 16 3.3 NA NA NA 11.2
9/10/2018 1.4 <0.50 0.61 <0.50 2.01 2.0 NA NA NA <0.50
6/21/2019 4.2 0.78 2.1 1.2 8.28 1.7 NA NA NA 5.1
12/11/2019 20.9 23.8 13.7 74.3 132.7 0.51 NA NA NA 5.3
3/9/2020 6.0 <0.50 8.7 2.1 16.8 2.0 NA NA NA 8.4
6/18/2020 0.93 <0.50 <0.50 <0.50 0.93 1.6 96 <1.0 96.9 0.78
12/8/2020 <0.50 <0.50 <0.50 <0.50 ND 1.4 66.8 <1.0 105 <0.50
7/20/2021 <0.50 <0.50 <0.50 <0.50 ND 0.51 <25 <1.0 31.7 <0.50
2/9/2022 <0.50 <0.50 <0.50 <0.50 ND 0.50 <25 <1.0 22.3 0.32 J
10/2/2023 <0.50 <0.50 <0.50 <0.50 <0.50 0.29 J 10.8 J <1.0 12.3 <0.50
8/20/2024 NS NS NS NS NS NS NS NS NS NS
9/13/2001 18,000 30,000 2,800 12,800 63,600 18,000 NA NA NA NA
3/20/2002 30,000 28,000 1,700 7,900 67,600 15,000 NA NA NA NA
5/5/2005 16,000 34,000 3,600 19,500 73,100 13,400 NA NA NA 1,700
5/16/2012 17,000 32,000 3,000 17,000 69,000 5,900 NA NA NA 1,200
4/11/2013 14,000 26,000 2,300 14,100 56,400 3,900 NA NA NA 1,100
2/19/2014 12,000 23,000 2,100 12,300 49,400 3,100 NA NA NA 1,000
7/31/2014 9,800 21,000 2,400 13,900 47,100 3,400 NA NA NA 930
4/23/2015 12,000 24,000 2,700 16,800 55,500 3,300 NA NA NA 1,400
10/6/2016 10,900 19,100 2,520 14,100 46,620 1,980 NA NA NA 1,990
5/3/2017 11,500 23,500 2,920 17,600 55,520 2,090 NA NA NA 1,040
12/28/2017 21,800 44,400 12,000 76,300 154,500 1,050 NA NA NA 10,200
3/27/2018 14,300 8,840 3,780 23,700 50,620 1,960 NA NA NA 3,170
9/10/2018 9,870 22,000 2,520 14,900 49,290 1,600 NA NA NA 1,650
6/21/2019 5,620 8,040 1,080 8,680 23,420 1,480 NA NA NA 1,490
12/11/2019 6.7 14.1 1.3 8.0 30.1 1.4 NA NA NA 0.67
3/9/2020 14,400 20,900 2,800 16,200 54,300 2,690 NA NA NA 2,190
6/18/2020 11,800 18,600 1,710 9,760 41,870 1,550 19,200 <200 3,180 1,070
12/8/2020 16,500 27,500 2,110 12,500 58,610 1,860 17,400 <200 <2000 1,210
7/20/2021 17,700 27,100 2,420 14,700 61,920 1,470 19,800 <400 <4000 919
2/9/2022 16,200 22,700 2,370 11,400 52,670 1,400 11,700 <50 <500 677
10/2/2023 15,500 27,700 2,820 15,400 61,420 1,050 13,400 <500 <5,000 803
8/20/2024 17,600 29,100 2,840 14,500 64,040 1,540 18,600 <200 3,270 758
NCDEQ 2L Standard 1 600 600 500 NE 20 40 128 10 6
5,000 260,000 80,000 50,000 NE 20,000 40,000 128,000 10,000 6,000
Notes:
1. "<" or ND = Not Detected at or above the laboratory reporting limit.
2. Concentrations are reported in micrograms per liter (μg/l) = parts per million.
3. Concentrations in bold print equal or exceed the corresponding NCDEQ 15A NCAC 2L .0202 Groundwater Quality 2L Standard (2L Standard).
4. Concentrations in bold italics equal or exceed the corresponding NCDEQ Gross Contamination Levels (GCL) for Groundwater.
6. BTEX = Benzene, toluene, ethylbenzene, xylenes.
7. GCL = Gross Contaminant Level.
8. J = Indicates consituent was detected above laboratory detection limits but below laboratory reporting limit.
9. MTBE = Methyl Tert Butyl Ether.
10. TAME = Tert-Amyl Methyl Ether.
11. TBA = Tert-Butyl Alcohol.
12. TAA = Tert-Amyl Alcohol.
13. NE = Not Established.
MW-5
MW-4
MW-3
Total BTEX MTBE Naphthalene
Not Sampled
GCL
Monitoring
Well
Sampling
Date Benzene Toluene Ethylbenzene Total
Xylenes
Page 2 of 3
TABLE 3
HISTORICAL GROUNDWATER ANALYTICAL RESULTS
FORMER CONOCO STORE#33074 (RM #6177)
4302 HIGH POINT ROAD
GREENSBORO, NORTH CAROLINA
ATC PROJECT NO. P666177040
TAA TAME TBA
9/13/2001 360 1,200 150 1,230 2,940 93 NA NA NA NA
3/20/2002 260 530 140 670 1,600 <50 NA NA NA NA
5/5/2005 510 1,400 450 1,410 3,770 105 NA NA NA 180
5/16/2012 150 540 430 1,120 2,240 8.7 NA NA NA 190
4/11/2013 72 54 190 152 468 3.2 NA NA NA 79
2/19/2014 140 170 390 410 1,110 4.8J NA NA NA 160
7/31/2014 110 240 340 610 1,300 6.5 NA NA NA 120
4/23/2015 120 330 400 610 1,460 4.9J NA NA NA 160
10/6/2016 195 858 576 1,600 3,229 9.7 NA NA NA 312
5/3/2017 108 360 372 750 1590 3.1 J NA NA NA 177
12/28/2017 51.7 111 173 305 640.7 <2.5 NA NA NA 66.7
3/27/2018 117 697 652 1,590 3,056 4.5 NA NA NA 281
9/10/2018 175 759 619 1,570 3,123 <5.0 NA NA NA 301
6/21/2019 161 504 755 1,600 3,020 <5.0 NA NA NA 342
12/11/2019 14.2 71.6 57.6 157 300.4 <0.50 NA NA NA 31.4
3/9/2020 134 381 586 1,150 2,251 4.9 NA NA NA 3686/18/2020 86.0 75.4 478 687 1,326.4 2.9 <25 <1.0 <10 182
12/8/2020 126 581 564 1,430 2,701 <5.0 <250 <10 <100 296
7/20/2021 <5.0 840 580 1,790 3,210 <5.0 <250 <10 <100 221
2/9/2022 18.3 16.6 90.3 57.1 182.3 <0.50 <25 <1.0 <10 33.1
10/2/2023 14.3 50.7 105.0 160.0 330.0 <2.5 <130 <5.0 <50 45.5
8/20/2024 9.4 25.5 59.5 126 220.4 < 0.50 <25 <1.0 <10 28.3
3/20/2002 <1 3.6 16 39 58.6 82 NA NA NA NA
5/16/2012 <2.5 <2.5 0.7J <2.5 0.7 300 NA NA NA <2.5
4/11/2013 <2.5 <2.5 <2.5 <2.5 ND 260 NA NA NA 1J
2/19/2014 <0.50 <0.50 <0.50 <0.50 ND 170 NA NA NA <0.50
7/31/2014
4/23/2015
10/6/2016 <0.3 0.21 <0.2 <0.6 ND 231 NA NA NA <0.50
5/3/2017 <0.50 <0.50 <0.50 <1.5 ND 194 NA NA NA 0.49 J
12/28/2017 <2.5 <2.5 <2.5 3.6 3.6 151 NA NA NA 3.3
9/10/2018 <0.50 1.6 0.85 2.5 4.95 177 NA NA NA 0.78
6/21/2019 <0.50 <0.50 <0.50 <0.50 ND 155 NA NA NA 0.56
12/11/2019 <0.50 <0.50 <0.50 <0.50 ND 190 NA NA NA <0.50
3/9/2020 <0.50 <0.50 <0.50 <0.50 ND 201 NA NA NA 0.71
6/18/2020 <0.50 <0.50 <0.50 <0.50 ND 75.1 <25 1.1 <10 <0.50
12/8/2020 <0.50 <0.50 <0.50 <0.50 ND 180 36.5 2.3 <10 <0.50
7/20/2021 <0.50 <0.50 <0.50 <0.50 ND 170 37.5 2.6 <10 <0.50
2/9/2022 <0.50 <0.50 <0.50 <0.50 ND 55.8 11.5 J 0.62 J 67.9 0.89
10/2/2023 <0.50 <0.50 <0.50 <0.50 <0.50 8.7 11.7 J <1.0 48.6 <0.50
8/20/2024 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50 7.9 13.2 J <1.0 55.1 0.27 J
7/31/2014 1,200 110 280 472 2,062 17 NA NA NA 180
4/23/2015 560 26 240 275 1,101 4.3J NA NA NA 180
10/6/2016
5/3/2017
12/28/2017
9/10/2018
12/8/2020
NCDEQ 2L Standard 1 600 600 500 NE 20 40 128 10 6
5,000 260,000 80,000 50,000 NE 20,000 40,000 128,000 10,000 6,000
Notes:
1. "<" or ND = Not Detected at or above the laboratory reporting limit.
2. Concentrations are reported in micrograms per liter (μg/l) = parts per million.
3. Concentrations in bold print equal or exceed the corresponding NCDEQ 15A NCAC 2L .0202 Groundwater Quality 2L Standard (2L Standard).
4. Concentrations in bold italics equal or exceed the corresponding NCDEQ Gross Contamination Levels (GCL) for Groundwater.
6. BTEX = Benzene, toluene, ethylbenzene, xylenes.
7. GCL = Gross Contaminant Level.
8. J = Indicates consituent was detected above laboratory detection limits but below laboratory reporting limit.
9. MTBE = Methyl Tert Butyl Ether.
10. TAME = Tert-Amyl Methyl Ether.
11. TBA = Tert-Butyl Alcohol.
12. TAA = Tert-Amyl Alcohol.
13. NE = Not Established.
14. NS = Not Sampled.
Not Sampled
Not Sampled/Inaccessible
NaphthaleneMonitoring
Well
Abandoned
SM-MW-1
Not Sampled
Not Sampled/Inaccessible
Not Sampled
GCL
MW-7
MW-6
Not Sampled
MTBESampling
Date Benzene Toluene Ethylbenzene Total
Xylenes Total BTEX
Page 3 of 3
Former Conoco Store #33074 (RM #6177)

ATC Project No. P666177040 Phillips 66 Company
FIGURES
2725 E. Millbrook Road, Ste 121
Raleigh, NC 27604
[phone]
SITE TOPOGRAPHIC MAP
PROJECT NO: P666177938
1” = 900’DATE: 07/2019 REVIEWED BY: GA
FORMER CONOCO STORE #33074 (RM #6177)
4302 HIGH POINT ROAD
GREENSBORO, NORTH CAROLINA
SOURCE: 1989 USGS GREENSBORO QUADRANGLE, NORTH CAROLINA –GUILFORD COUNTY, 7.5 MINUTE SERIES TOPOGRAPHIC MAP,
SCALE 1:24,000.
FIGURE 1
SITE
NN
SCALE: 1" = 40'
0 10 20 30 40
N
HIGH

P
O
I
N
T

R
O
A
D
ROMA
I
N
E

S
T
R
E
E
T
K
D
D
D
D
NTB-NATIONAL
TIRE & BATTERY
AAMCO
TRANSMISSIONS
RAZOR LINEBARBERSHOP
SHINE
AUTOMOTIVE
FURNITURE AND
MATTRESS FOR
LESS
CLASSIC CARWASH
AIRTREATMENT INC.
YOUNG YU
TAE KWON DO
FORMER
CONOCO STORE
#33074
UST
UST
UST
LEGEND:
SITE PROPERTY LINE
NOTE: ALL LOCATIONS ARE APPROXIMATE
PARCEL LINE
MW-2
MW-1D
TYPE IIMONITORING WELL
Well Identification
TYPE III MONITORING WELL
Well Identification
DISPENSER
KEROSENE DISPENSER
D
K
MW-7
MW-5
MW-2
MW-1D
SM-MW-1
MW-4
MW-6
MW-1
MW-3
AS-1
AS-2
AS-1 AIR SPARGE WELL
Well Identification
UST
SM-MW-1ABANDONED MONITORING WELL
Well Identification
Fig
u
r
e
:
Drawing File:
Project Number:
Ckd. By:
Drn. By:
App'd By:
Ckd. Date:
Sc
a
l
e
:
Da
t
e
:
08
/
2
4
/
2
0
2
1
SEE LOWER LEFTFORMER CONOCO STORE #33074 (RM #6177)
4302 HIGH POINT ROAD
GREENSBORO, NORTH CAROLINA
P666177351
AS

S
H
O
W
N
DH
AS2
NOTES:
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
H:\2021\OTHER OFFICES\NORTH CAROLINA\NCDEQ-STATE LEAD\PHILLIP 66\RM #6177\P666177351-SITE.DWG, FIG2
SITE MAP
SCALE: 1" = 40'
0 10 20 30 40
N
HIGH

P
O
I
N
T

R
O
A
D
ROMA
I
N
E

S
T
R
E
E
T
K
D
D
D
D
NTB-NATIONAL
TIRE & BATTERY
AAMCO
TRANSMISSIONS
RAZOR LINEBARBERSHOP
SHINE
AUTOMOTIVE
FURNITURE AND
MATTRESS FOR
LESS
CLASSIC CARWASH
AIRTREATMENT INC.
YOUNG YU
TAE KWON DO
FORMER
CONOCO STORE
#33074
UST
UST
UST
LEGEND:
SITE PROPERTY LINE
NOTE: ALL LOCATIONS ARE APPROXIMATE
PARCEL LINE
MW-1D TYPE III MONITORING WELL
Well Identification
DISPENSER
KEROSENE DISPENSER
D
K
MW-7
MW-5
MW-2
MW-1D
SM-MW-1
MW-4
MW-6
MW-1
MW-3
AS-1
AS-2
AS-1 AIR SPARGE WELL
Well Identification
UST
91.0 GROUNDWATER ELEVATION CONTOUR
(DASHED WHERE INFERRED) (ft)
GROUNDWATER FLOW DIRECTION
MW-290.46 MONITORING WELL
Well Identification
Relative Groundwater Elevation (ft)
92.35
91.90
89.50
NM
90.46
89.36
89.00
83.67
SM-MW-1ABANDONED MONITORING WELL
Well Identification
84.0
92.0
91.
0
90.
0
89.0
88.0
87.0
86.0
85.0
Fi
g
u
r
e
:
Drawing File:
Project Number:
Ckd. By:
Drn. By:
App'd By:
Ckd. Date:
Sc
a
l
e
:
Da
t
e
:
09
/
1
2
/
2
0
2
4
SEE LOWER LEFTFORMER CONOCO STORE #33074 (RM #6177)
4302 HIGH POINT ROAD
GREENSBORO, NORTH CAROLINA
P666177040
AS

S
H
O
W
N
EM
LC3
NOTES:
1.Features shown are not an authoritative location, nor are they presented
to a stated accuracy.
2.GROUNDWATER ELEVATION DATA COLLECTED ON 08/20/24..
3.NM = NOT MEASURED
COORDINATE SYSTEM:
NAD 1983 NORTH CAROLINA STATE PLANE FIPS 3200, US SURVEY FEET
C:\USERS\ECHO.MILANUK\ONEATLAS\DIGITAL SERVICES - FILE SERVER\2024\CAD DEPARTMENT\PHILLIPS 66\NORTH CAROLINA\RM 6177\P666177040-POT 8.24.DWG, FIG3
GROUNDWATER ELEVATION CONTOUR MAP
SCALE: 1" = 40'
0 10 20 30 40
N
HIGH

P
O
I
N
T

R
O
A
D
ROMA
I
N
E

S
T
R
E
E
T
K
D
D
D
D
NTB-NATIONAL
TIRE & BATTERY
AAMCO
TRANSMISSIONS
RAZOR LINE
BARBERSHOP
SHINE
AUTOMOTIVE
FURNITURE AND
MATTRESS FOR
LESS
CLASSIC CARWASH
AIRTREATMENT INC.
YOUNG YU
TAE KWON DO
FORMER
CONOCO STORE
#33074
UST
UST
UST
LEGEND:
SITE PROPERTY LINE
NOTE: ALL LOCATIONS ARE APPROXIMATE
PARCEL LINE
MW-1D TYPE III MONITORING WELL
Well Identification
DISPENSER
KEROSENE DISPENSER
D
K
MW-7
MW-5
MW-2
MW-1D
SM-MW-1
MW-4
MW-6
MW-1
MW-3
AS-1
AS-2
AS-1 AIR SPARGE WELL
Well Identification
UST
100 BENZENE ISOCONCENTRATION CONTOUR
(DASHED WHERE INFERRED) (µg/L)
MW-11.2 MONITORING WELL
Well Identification
Benzene Concentration (µg/L).
1.2
9.4
ND
NS
1,510
ND
17,600
<0.50
SM-MW-1ABANDONED MONITORING WELL
Well Identification
10,000
1000
100
10
1
Fi
g
u
r
e
:
Drawing File:
Project Number:
Ckd. By:
Drn. By:
App'd By:
Ckd. Date:
Sc
a
l
e
:
Da
t
e
:
09
/
2
5
/
2
0
2
4
SEE LOWER LEFTFORMER CONOCO STORE #33074 (RM #6177)
4302 HIGH POINT ROAD
GREENSBORO, NORTH CAROLINA
P666177040
AS

S
H
O
W
N
EM
LC4
NOTES:
1.Features shown are not an authoritative location, nor are they presented
to a stated accuracy.
2.GROUNDWATER ANALYTICAL DATA COLLECTED ON 08/20/2024.
3.ND = NOT DETECTED
4.NS = NOT SAMPLED
COORDINATE SYSTEM:
NAD 1983 NORTH CAROLINA STATE PLANE FIPS 3200, US SURVEY FEET
C:\USERS\ECHO.MILANUK\ONEATLAS\DIGITAL SERVICES - FILE SERVER\2024\CAD DEPARTMENT\PHILLIPS 66\NORTH CAROLINA\RM 6177\P666177040-BENZ 8.24.DWG, FIG4
DISSOLVED BENZENE
ISOCONCENTRATION CONTOUR MAP
SCALE: 1" = 40'
0 10 20 30 40
N
HIGH

P
O
I
N
T

R
O
A
D
ROMA
I
N
E

S
T
R
E
E
T
K
D
D
D
D
NTB-NATIONAL
TIRE & BATTERY
AAMCO
TRANSMISSIONS
RAZOR LINE
BARBERSHOP
SHINE
AUTOMOTIVE
FURNITURE AND
MATTRESS FOR
LESS
CLASSIC CARWASH
AIRTREATMENT INC.
YOUNG YU
TAE KWON DO
FORMER
CONOCO STORE
#33074
UST
UST
UST
LEGEND:
SITE PROPERTY LINE
NOTE: ALL LOCATIONS ARE APPROXIMATE
PARCEL LINE
MW-2
MW-1D
TYPE IIMONITORING WELL
Well Identification
TYPE III MONITORING WELL
Well Identification
DISPENSER
KEROSENE DISPENSER
D
K
MW-7
MW-5
MW-2
MW-1D
SM-MW-1
MW-4
MW-6
MW-1
MW-3
AS-1
AS-2
AS-1 AIR SPARGE WELL
Well Identification
UST
SM-MW-1ABANDONED MONITORING WELL
Well Identification
Fi
g
u
r
e
:
Drawing File:
Project Number:
Ckd. By:
Drn. By:
App'd By:
Ckd. Date:
Sc
a
l
e
:
Da
t
e
:
09
/
2
5
/
2
0
2
4
SEE LOWER LEFTFORMER CONOCO STORE #33074 (RM #6177)
4302 HIGH POINT ROAD
GREENSBORO, NORTH CAROLINA
P666177040
AS

S
H
O
W
N
EM
LC5
NOTES:
1.Features shown are not an authoritative location, nor are they presented
to a stated accuracy.
2.Groundwater Analytical data collected August 20, 2024.
3.Only compounds detected above 2L Standards are shown.
4.J = Estimate concentration.
5.Concentrations are reported in micrograms per liter (µg/L).
COORDINATE SYSTEM:
NAD 1983 NORTH CAROLINA STATE PLANE FIPS 3200, US SURVEY FEET
C:\USERS\ECHO.MILANUK\ONEATLAS\DIGITAL SERVICES - FILE SERVER\2024\CAD DEPARTMENT\PHILLIPS 66\NORTH CAROLINA\RM 6177\P666177040-COC 8.24.DWG, FIG5
OTHER CHEMICALS OF CONCERN
IN GROUNDWATER
FIGURE 6
CONCENTRATION VERSUS TIME GRAPHS
FORMER CONOCO STORE #33074 (RM #6177)
4302 HIGH POINT ROAD
GREENSBORO, NORTH CAROLINA
ATC PROJECT NO. P666177938
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Date
MW-1
Benzene
Total BTEX
MTBE
Naphthalene
0
1000
2000
3000
4000
5000
6000
7000
8000
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g/
L
)
Date
MW-1D
Benzene
Total BTEX
MTBE
Naphthalene
0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Date
MW-2
Benzene
Total BTEX
MTBE
Naphthalene
AFVR Events -8/31/17,9/28/17, 11/2/17, and 11/30/17
AFVR Events -
3/6/19, 4/18/19,
5/30/19, and 8/14/19
Page 1 of 3
FIGURE 6
CONCENTRATION VERSUS TIME GRAPHS
FORMER CONOCO STORE #33074 (RM #6177)
4302 HIGH POINT ROAD
GREENSBORO, NORTH CAROLINA
ATC PROJECT NO. P666177938
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
16.0
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Date
MW-3
Benzene
Total BTEX
MTBE
Naphthalene
0
100
200
300
400
500
600
700
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Date
MW-4
Benzene
Total BTEX
MTBE
Naphthalene
0
20,000
40,000
60,000
80,000
100,000
120,000
140,000
160,000
180,000
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Date
MW-5
Benzene
Total BTEX
MTBE
Naphthalene
AFVR Events -8/31/17,9/28/17, 11/2/17, 11/30/17, and 7/10/18
AFVR Events-
3/6/19, 4/18/19, 5/30/19, and
8/14/19
Page 2 of 3
FIGURE 6
CONCENTRATION VERSUS TIME GRAPHS
FORMER CONOCO STORE #33074 (RM #6177)
4302 HIGH POINT ROAD
GREENSBORO, NORTH CAROLINA
ATC PROJECT NO. P666177938
0
500
1000
1500
2000
2500
3000
3500
4000
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Date
MW-6
Benzene
Total BTEX
MTBE
Naphthalene
0
50
100
150
200
250
300
350
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/L
)
Date
MW-7
Benzene
Total BTEX
MTBE
Naphthalene
Page 3 of 3
Former Conoco Store #33074 (RM #6177)

ATC Project No. P666177040 Phillips 66 Company
APPENDIX A

LABORATORY ANALYTICAL RESULTS
08/29/24
Technical Report for
Atlas
RM 6177, 4302 W Gate City Blvd, Greensboro, NC
SGS Job Number: LB5750
Sampling Date: 08/20/24
Report to:
ATC Group Services LLC.
2725 East Millbrook Road Suite 121
Raleigh, NC 27604
[e-mail]
ATTN: Gabe Araos
Total number of pages in report:
Certifications: LDEQ(2048), LDHH(LA150012), AR(14-045-04), AZ(AZ0805), FL(E87657), IL(200082), KY(#31),
NC(487), SC(73004001), NJ(LA007), TX(T104704186-18-16), WV(257)
This report shall not be reproduced, except in its entirety, without the written approval of SGS.
Test results relate only to samples analyzed.
SGS North America Inc.  500 Ambassador Caffery  Scott, LA 70583  tel: [phone]
Test results contained within this data package meet the requirements
of the National Environmental Laboratory Accreditation Program
and/or state specific certification programs as applicable unless noted
in the narrative, comments or footnotes.
Client Service contact: Suzanne Junkin 337-237-4775
Kesavalu Bagawandoss
Tech. Director North America
Scott, LA 08/29/24
e-Hardcopy 2.0
Automated Report
52
SGS is the sole authority for authorizing edits or modifications to this document.
Unauthorized modification of this report is strictly prohibited.
Review standard terms at: http://www.sgs.com/en/terms-and-conditions
The results set forth herein are provided by SGS North America Inc.
Please share your ideas about
how we can serve you better at:
[e-mail]
1 of 52
LB5750
Table of Contents
-1-
Sections:
Section 1: Sample Summary ...................................................................................................3
Section 2: Case Narrative/Conformance Summary ..............................................................4
Section 3: Summary of Hits ....................................................................................................6
Section 4: Sample Results ........................................................................................................8
4.1: LB5750-1: MW-1 .........................................................................................................9
4.2: LB5750-2: MW-1D ......................................................................................................12
4.3: LB5750-3: MW-2 .........................................................................................................15
4.4: LB5750-4: MW-3 .........................................................................................................18
4.5: LB5750-5: MW-5 .........................................................................................................21
4.6: LB5750-6: MW-6 .........................................................................................................24
4.7: LB5750-7: MW-7 .........................................................................................................27
Section 5: Misc. Forms ............................................................................................................30
5.1: Chain of Custody ...........................................................................................................31
Section 6: MS Volatiles - QC Data Summaries .....................................................................34
6.1: Method Blank Summary ................................................................................................35
6.2: Blank Spike/Blank Spike Duplicate Summary ..............................................................41
6.3: Matrix Spike/Matrix Spike Duplicate Summary ...........................................................47
1
2
3
4
5
6
2 of 52
LB5750
SGS North America Inc.
Sample Summary
Atlas
Job No:LB5750
RM 6177, 4302 W Gate City Blvd, Greensboro, NC
Sample Collected Matrix Client
Number Date Time By Received Code Type Sample ID
This report contains results reported as ND = Not detected. The following applies:
Organics ND = Not detected above the MDL
LB5750-1 08/20/24 12:40 BB 08/23/24 AQ Ground Water MW-1
LB5750-2 08/20/24 12:15 BB 08/23/24 AQ Ground Water MW-1D
LB5750-3 08/20/24 14:05 BB 08/23/24 AQ Ground Water MW-2
LB5750-4 08/20/24 11:35 BB 08/23/24 AQ Ground Water MW-3
LB5750-5 08/20/24 14:35 BB 08/23/24 AQ Ground Water MW-5
LB5750-6 08/20/24 13:30 BB 08/23/24 AQ Ground Water MW-6
LB5750-7 08/20/24 15:25 BB 08/23/24 AQ Ground Water MW-7
3 of 52
LB5750
1
On 08/23/2024, 7 sample(s), 0 Trip Blank(s), 0 Equip. Blank(s) and 0 Field Blank(s) were received at SGS North America Inc.
(SGS) at a temperature of 3.8 °C. The samples were intact and properly preserved, unless noted below. An SGS Job Number of
LB5750 was assigned to the project. The lab sample ID, client sample ID, and date of sample collection are detailed in the report’s
Results Summary.
Specified quality control criteria were achieved for this job except as noted below. For more information, please refer to the
analytical results and QC summary pages.
Client:Atlas
Site:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
Job No:LB5750
Report Date 8/29/2024 2:19:15 PM
CASE NARRATIVE / CONFORMANCE SUMMARY
MS Volatiles By Method SM 6200B
Matrix:AQ Batch ID:V2K4355
All samples were analyzed within the recommended method holding time.
All method blanks for this batch meet method specific criteria.
Sample(s) LB5750-6MS, LB5750-6MSD, LB5750-6MSMSD were used as the QC samples indicated.
The matrix spike (MS) recovery(s) of 2-Hexanone, Acetone are outside control limits. Probable cause due to matrix
interference.
The matrix spike duplicate (MSD) recovery(s) of 2-Hexanone, Acetone are outside control limits. Probable cause due to matrix
interference.
LB5750-6: Sample used for QC purposes only.
Matrix:AQ Batch ID:V2K4357
All samples were analyzed within the recommended method holding time.
Sample(s) LB5750-3MS, LB5750-3MSD, LB5750-3MSMSD were used as the QC samples indicated.
All method blanks for this batch meet method specific criteria.
The matrix spike (MS) recovery(s) of Benzene, 2-Hexanone, Acetone, Naphthalene, n-Butylbenzene are outside control limits.
Outside control limits due to high level in sample relative to spike amount.
The matrix spike duplicate (MSD) recovery(s) of 2-Hexanone, Acetone, Methylene Chloride, n-Butylbenzene are outside
control limits. Probable cause due to matrix interference.
The matrix spike (MS) recovery(s) of 1,2,4-Trimethylbenzene, Ethylbenzene, m,p-Xylene, o-Xylene, Toluene, Xylene (total)
are outside control limits. Outside control limits due to high level in sample relative to spike amount.
LB5750-2 for Chloroethane: Associated CCV outside of control limits high, sample was ND.
LB5750-6 for Chloroethane: Associated CCV outside of control limits high, sample was ND.
LB5750-3MS for n-Butylbenzene: Outside control limits due to matrix interference. Blank Spike meets acceptance criteria.
LB5750-7 for Chloroethane: Associated CCV outside of control limits high, sample was ND.
LB5750-3 for Chloroethane: Associated CCV outside of control limits high, sample was ND.
LB5750-3MS for 2-Hexanone: Outside control limits due to matrix interference. Blank Spike meets acceptance criteria.
LB5750-3MS for Acetone: Outside control limits due to matrix interference. Blank Spike meets acceptance criteria.
LB5750-3MS for Naphthalene: Outside control limits due to matrix interference. Blank Spike meets acceptance criteria.
Thursday, August 29, 2024 Page 1 of 2
4 of 52
LB5750
2
SGS certifies that data reported for samples received, listed on the associated custody chain or analytical task order, were produced
to specifications meeting SGS's Quality System precision, accuracy and completeness objectives except as noted.
Estimated non-standard method measurement uncertainty data is available on request, based on quality control bias and implicit for
standard methods. Acceptable uncertainty requires tested parameter quality control data to meet method criteria.
SGS is not responsible for data quality assumptions if partial reports are used and recommends that this report be used in its
entirety. This report is authorized by SGS indicated via signature on the report cover.
Thursday, August 29, 2024 Page 2 of 2
5 of 52
LB5750
2
Summary of Hits Page 1 of 2
Job Number:LB5750
Account:Atlas
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
Collected:08/20/24
Lab Sample ID Client Sample ID Result/
Analyte Qual RL MDL Units Method
LB5750-1 MW-1
Benzene 1.2 0.50 0.27 ug/l SM 6200B
Di-Isopropyl Ether 1.2 0.50 0.073 ug/l SM 6200B
Methyl Tert Butyl Ether 0.68 0.50 0.068 ug/l SM 6200B
Tert-Amyl Alcohol 63.6 25 0.77 ug/l SM 6200B
Tert-Butyl Alcohol 54.3 10 1.0 ug/l SM 6200B
LB5750-2 MW-1D
Di-Isopropyl Ether 2.2 0.50 0.073 ug/l SM 6200B
Ethyl Tert-Butyl Ether 1.2 0.50 0.056 ug/l SM 6200B
Methyl Tert Butyl Ether 20.7 0.50 0.068 ug/l SM 6200B
Tert-Amyl Alcohol 303 25 0.77 ug/l SM 6200B
Tert-Amyl Methyl Ether 0.42 J 1.0 0.084 ug/l SM 6200B
Tert-Butyl Alcohol 410 100 10 ug/l SM 6200B
LB5750-3 MW-2
Acetone 312 J 500 62 ug/l SM 6200B
Benzene 1510 25 14 ug/l SM 6200B
Ethylbenzene 2480 25 10 ug/l SM 6200B
Isopropylbenzene 76.0 25 6.6 ug/l SM 6200B
Methylene Chloride 134 25 4.0 ug/l SM 6200B
Methyl Tert Butyl Ether 20.2 J 25 3.4 ug/l SM 6200B
Naphthalene 765 25 5.0 ug/l SM 6200B
n-Propylbenzene 231 25 11 ug/l SM 6200B
Styrene 59.2 25 6.3 ug/l SM 6200B
Tert-Amyl Alcohol 3740 1300 38 ug/l SM 6200B
Toluene 3800 25 15 ug/l SM 6200B
1,2,4-Trimethylbenzene 1850 25 7.3 ug/l SM 6200B
1,3,5-Trimethylbenzene 463 25 8.1 ug/l SM 6200B
m,p-Xylene 7140 50 17 ug/l SM 6200B
o-Xylene 3290 25 7.4 ug/l SM 6200B
Xylene (total)10400 25 8.1 ug/l SM 6200B
LB5750-4 MW-3
No hits reported in this sample.
LB5750-5 MW-5
Benzene 17600 100 54 ug/l SM 6200B
Di-Isopropyl Ether 280 100 15 ug/l SM 6200B
Ethylbenzene 2840 100 40 ug/l SM 6200B
6 of 52
LB5750
3
Summary of Hits Page 2 of 2
Job Number:LB5750
Account:Atlas
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
Collected:08/20/24
Lab Sample ID Client Sample ID Result/
Analyte Qual RL MDL Units Method
Isopropylbenzene 123 100 26 ug/l SM 6200B
Methylene Chloride 47.1 J 100 16 ug/l SM 6200B
Methyl Tert Butyl Ether 1540 100 14 ug/l SM 6200B
Naphthalene 758 100 20 ug/l SM 6200B
n-Propylbenzene 388 100 44 ug/l SM 6200B
Styrene 63.3 J 100 25 ug/l SM 6200B
Tert-Amyl Alcohol 18600 5000 150 ug/l SM 6200B
Tert-Butyl Alcohol 3270 2000 200 ug/l SM 6200B
Toluene 29100 250 150 ug/l SM 6200B
1,2,4-Trimethylbenzene 2900 100 29 ug/l SM 6200B
1,3,5-Trimethylbenzene 767 100 32 ug/l SM 6200B
m,p-Xylene 9650 200 67 ug/l SM 6200B
o-Xylene 4860 100 30 ug/l SM 6200B
Xylene (total)14500 100 32 ug/l SM 6200B
LB5750-6 MW-6
Acetone 32.5 10 1.2 ug/l SM 6200B
Benzene 9.4 0.50 0.27 ug/l SM 6200B
Ethylbenzene 59.5 0.50 0.20 ug/l SM 6200B
Isopropylbenzene 6.3 0.50 0.13 ug/l SM 6200B
p-Isopropyltoluene 0.66 0.50 0.13 ug/l SM 6200B
Naphthalene 28.3 0.50 0.10 ug/l SM 6200B
n-Propylbenzene 19.8 0.50 0.22 ug/l SM 6200B
Styrene 0.28 J 0.50 0.13 ug/l SM 6200B
Toluene 25.5 0.50 0.29 ug/l SM 6200B
1,2,3-Trichloropropane 1.1 0.50 0.023 ug/l SM 6200B
1,2,4-Trimethylbenzene 85.4 0.50 0.15 ug/l SM 6200B
1,3,5-Trimethylbenzene 18.6 0.50 0.16 ug/l SM 6200B
Vinyl Acetate 1.8 0.50 0.069 ug/l SM 6200B
m,p-Xylene 82.5 1.0 0.34 ug/l SM 6200B
o-Xylene 43.7 0.50 0.15 ug/l SM 6200B
Xylene (total)126 0.50 0.16 ug/l SM 6200B
LB5750-7 MW-7
1,2-Dichloroethane 0.62 0.20 0.12 ug/l SM 6200B
Di-Isopropyl Ether 18.7 0.50 0.073 ug/l SM 6200B
Isopropylbenzene 0.19 J 0.50 0.13 ug/l SM 6200B
Methyl Chloride 0.27 J 0.50 0.066 ug/l SM 6200B
Methyl Tert Butyl Ether 7.9 0.50 0.068 ug/l SM 6200B
Naphthalene 0.27 J 0.50 0.10 ug/l SM 6200B
Tert-Amyl Alcohol 13.2 J 25 0.77 ug/l SM 6200B
Tert-Butyl Alcohol 55.1 10 1.0 ug/l SM 6200B
Vinyl Acetate 1.4 0.50 0.069 ug/l SM 6200B
7 of 52
LB5750
3
SGS North America Inc.
Sample Results
Report of Analysis
Scott, LA
Section 4
8 of 52
LB5750
4
SGS North America Inc.
Report of Analysis Page 1 of 3
Client Sample ID:MW-1
Lab Sample ID:LB5750-1 Date Sampled:08/20/24
Matrix:AQ - Ground Water Date Received:08/23/24
Method:SM 6200B Percent Solids:n/a
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
Run #1 2K0153989.D 1 08/26/24 15:14 JY n/a n/a V2K4355
Run #2
Purge Volume
Run #1 25.0 ml
Run #2
VOA Special List
CAS No.Compound Result RL MDL Units Q
67-64-1 Acetone ND 10 1.2 ug/l
71-43-2 Benzene 1.2 0.50 0.27 ug/l
108-86-1 Bromobenzene ND 0.50 0.18 ug/l
74-97-5 Bromochloromethane ND 0.50 0.12 ug/l
75-27-4 Bromodichloromethane ND 0.50 0.18 ug/l
75-25-2 Bromoform ND 0.50 0.10 ug/l
104-51-8 n-Butylbenzene ND 0.50 0.092 ug/l
135-98-8 sec-Butylbenzene ND 0.50 0.14 ug/l
98-06-6 tert-Butylbenzene ND 0.50 0.16 ug/l
56-23-5 Carbon Tetrachloride ND 0.20 0.092 ug/l
108-90-7 Chlorobenzene ND 0.50 0.16 ug/l
75-00-3 Chloroethane ND 0.50 0.055 ug/l
67-66-3 Chloroform ND 0.50 0.094 ug/l
95-49-8 o-Chlorotoluene ND 0.50 0.16 ug/l
106-43-4 p-Chlorotoluene ND 0.50 0.20 ug/l
124-48-1 Dibromochloromethane ND 0.20 0.075 ug/l
96-12-8 1,2-Dibromo-3-chloropropane ND 0.50 0.13 ug/l
106-93-4 1,2-Dibromoethane ND 0.50 0.24 ug/l
75-71-8 Dichlorodifluoromethane ND 0.50 0.12 ug/l
541-73-1 m-Dichlorobenzene ND 0.50 0.063 ug/l
95-50-1 o-Dichlorobenzene ND 0.50 0.20 ug/l
106-46-7 p-Dichlorobenzene ND 0.50 0.22 ug/l
75-34-3 1,1-Dichloroethane ND 0.50 0.10 ug/l
107-06-2 1,2-Dichloroethane ND 0.20 0.12 ug/l
75-35-4 1,1-Dichloroethylene ND 0.50 0.094 ug/l
156-59-2 cis-1,2-Dichloroethylene ND 0.50 0.11 ug/l
156-60-5 trans-1,2-Dichloroethylene ND 0.50 0.15 ug/l
78-87-5 1,2-Dichloropropane ND 0.30 0.13 ug/l
142-28-9 1,3-Dichloropropane ND 0.50 0.21 ug/l
594-20-7 2,2-Dichloropropane ND 0.50 0.079 ug/l
563-58-6 1,1-Dichloropropene ND 0.50 0.12 ug/l
10061-01-5 cis-1,3-Dichloropropene ND 0.20 0.10 ug/l
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
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Client Sample ID:MW-1
Lab Sample ID:LB5750-1 Date Sampled:08/20/24
Matrix:AQ - Ground Water Date Received:08/23/24
Method:SM 6200B Percent Solids:n/a
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
VOA Special List
CAS No.Compound Result RL MDL Units Q
10061-02-6 trans-1,3-Dichloropropene ND 0.20 0.056 ug/l
108-20-3 Di-Isopropyl Ether 1.2 0.50 0.073 ug/l
624-95-3 3,3-Dimethyl-1-butanol ND 5.0 1.8 ug/l
64-17-5 Ethyl Alcohol ND 50 8.4 ug/l
100-41-4 Ethylbenzene ND 0.50 0.20 ug/l
637-92-3 Ethyl Tert-Butyl Ether ND 0.50 0.056 ug/l
591-78-6 2-Hexanone ND 1.0 0.42 ug/l
87-68-3 Hexachlorobutadiene ND 0.20 0.11 ug/l
98-82-8 Isopropylbenzene ND 0.50 0.13 ug/l
99-87-6 p-Isopropyltoluene ND 0.50 0.13 ug/l
74-83-9 Methyl Bromide ND 0.50 0.23 ug/l
74-87-3 Methyl Chloride ND 0.50 0.066 ug/l
74-95-3 Methylene Bromide ND 0.50 0.11 ug/l
75-09-2 Methylene Chloride ND 0.50 0.080 ug/l
78-93-3 Methyl Ethyl Ketone ND 25 0.28 ug/l
108-10-1 4-Methyl-2-pentanone ND 0.50 0.24 ug/l
1634-04-4 Methyl Tert Butyl Ether 0.68 0.50 0.068 ug/l
91-20-3 Naphthalene ND 0.50 0.10 ug/l
103-65-1 n-Propylbenzene ND 0.50 0.22 ug/l
100-42-5 Styrene ND 0.50 0.13 ug/l
75-85-4 Tert-Amyl Alcohol 63.6 25 0.77 ug/l
994-05-8 Tert-Amyl Methyl Ether ND 1.0 0.084 ug/l
75-65-0 Tert-Butyl Alcohol 54.3 10 1.0 ug/l
762-75-4 tert-Butyl Formate ND 5.0 0.035 ug/l
630-20-6 1,1,1,2-Tetrachloroethane ND 0.50 0.18 ug/l
79-34-5 1,1,2,2-Tetrachloroethane ND 0.20 0.12 ug/l
127-18-4 Tetrachloroethylene ND 0.50 0.22 ug/l
108-88-3 Toluene ND 0.50 0.29 ug/l
87-61-6 1,2,3-Trichlorobenzene ND 0.50 0.16 ug/l
120-82-1 1,2,4-Trichlorobenzene ND 0.50 0.17 ug/l
71-55-6 1,1,1-Trichloroethane ND 0.50 0.16 ug/l
79-00-5 1,1,2-Trichloroethane ND 0.30 0.17 ug/l
79-01-6 Trichloroethylene ND 0.50 0.18 ug/l
75-69-4 Trichlorofluoromethane ND 0.50 0.073 ug/l
96-18-4 1,2,3-Trichloropropane ND 0.50 0.023 ug/l
95-63-6 1,2,4-Trimethylbenzene ND 0.50 0.15 ug/l
108-67-8 1,3,5-Trimethylbenzene ND 0.50 0.16 ug/l
108-05-4 Vinyl Acetate ND 0.50 0.069 ug/l
75-01-4 Vinyl Chloride ND 0.10 0.075 ug/l
m,p-Xylene ND 1.0 0.34 ug/l
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
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Report of Analysis Page 3 of 3
Client Sample ID:MW-1
Lab Sample ID:LB5750-1 Date Sampled:08/20/24
Matrix:AQ - Ground Water Date Received:08/23/24
Method:SM 6200B Percent Solids:n/a
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
VOA Special List
CAS No.Compound Result RL MDL Units Q
95-47-6 o-Xylene ND 0.50 0.15 ug/l
1330-20-7 Xylene (total)ND 0.50 0.16 ug/l
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
17060-07-0 1,2-Dichloroethane-D4 98%70-130%
2037-26-5 Toluene-D8 100%70-130%
460-00-4 4-Bromofluorobenzene 106%70-130%
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
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Report of Analysis Page 1 of 3
Client Sample ID:MW-1D
Lab Sample ID:LB5750-2 Date Sampled:08/20/24
Matrix:AQ - Ground Water Date Received:08/23/24
Method:SM 6200B Percent Solids:n/a
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
Run #1 2K0154016.D 1 08/28/24 12:50 JY n/a n/a V2K4357
Run #2 2K0153994.D 10 08/26/24 17:32 JY n/a n/a V2K4355
Purge Volume
Run #1 25.0 ml
Run #2 25.0 ml
VOA Special List
CAS No.Compound Result RL MDL Units Q
67-64-1 Acetone ND 10 1.2 ug/l
71-43-2 Benzene ND 0.50 0.27 ug/l
108-86-1 Bromobenzene ND 0.50 0.18 ug/l
74-97-5 Bromochloromethane ND 0.50 0.12 ug/l
75-27-4 Bromodichloromethane ND 0.50 0.18 ug/l
75-25-2 Bromoform ND 0.50 0.10 ug/l
104-51-8 n-Butylbenzene ND 0.50 0.092 ug/l
135-98-8 sec-Butylbenzene ND 0.50 0.14 ug/l
98-06-6 tert-Butylbenzene ND 0.50 0.16 ug/l
56-23-5 Carbon Tetrachloride ND 0.20 0.092 ug/l
108-90-7 Chlorobenzene ND 0.50 0.16 ug/l
75-00-3 Chloroethane a ND 0.50 0.055 ug/l
67-66-3 Chloroform ND 0.50 0.094 ug/l
95-49-8 o-Chlorotoluene ND 0.50 0.16 ug/l
106-43-4 p-Chlorotoluene ND 0.50 0.20 ug/l
124-48-1 Dibromochloromethane ND 0.20 0.075 ug/l
96-12-8 1,2-Dibromo-3-chloropropane ND 0.50 0.13 ug/l
106-93-4 1,2-Dibromoethane ND 0.50 0.24 ug/l
75-71-8 Dichlorodifluoromethane ND 0.50 0.12 ug/l
541-73-1 m-Dichlorobenzene ND 0.50 0.063 ug/l
95-50-1 o-Dichlorobenzene ND 0.50 0.20 ug/l
106-46-7 p-Dichlorobenzene ND 0.50 0.22 ug/l
75-34-3 1,1-Dichloroethane ND 0.50 0.10 ug/l
107-06-2 1,2-Dichloroethane ND 0.20 0.12 ug/l
75-35-4 1,1-Dichloroethylene ND 0.50 0.094 ug/l
156-59-2 cis-1,2-Dichloroethylene ND 0.50 0.11 ug/l
156-60-5 trans-1,2-Dichloroethylene ND 0.50 0.15 ug/l
78-87-5 1,2-Dichloropropane ND 0.30 0.13 ug/l
142-28-9 1,3-Dichloropropane ND 0.50 0.21 ug/l
594-20-7 2,2-Dichloropropane ND 0.50 0.079 ug/l
563-58-6 1,1-Dichloropropene ND 0.50 0.12 ug/l
10061-01-5 cis-1,3-Dichloropropene ND 0.20 0.10 ug/l
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
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Report of Analysis Page 2 of 3
Client Sample ID:MW-1D
Lab Sample ID:LB5750-2 Date Sampled:08/20/24
Matrix:AQ - Ground Water Date Received:08/23/24
Method:SM 6200B Percent Solids:n/a
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
VOA Special List
CAS No.Compound Result RL MDL Units Q
10061-02-6 trans-1,3-Dichloropropene ND 0.20 0.056 ug/l
108-20-3 Di-Isopropyl Ether 2.2 0.50 0.073 ug/l
624-95-3 3,3-Dimethyl-1-butanol ND 5.0 1.8 ug/l
64-17-5 Ethyl Alcohol ND 50 8.4 ug/l
100-41-4 Ethylbenzene ND 0.50 0.20 ug/l
637-92-3 Ethyl Tert-Butyl Ether 1.2 0.50 0.056 ug/l
591-78-6 2-Hexanone ND 1.0 0.42 ug/l
87-68-3 Hexachlorobutadiene ND 0.20 0.11 ug/l
98-82-8 Isopropylbenzene ND 0.50 0.13 ug/l
99-87-6 p-Isopropyltoluene ND 0.50 0.13 ug/l
74-83-9 Methyl Bromide ND 0.50 0.23 ug/l
74-87-3 Methyl Chloride ND 0.50 0.066 ug/l
74-95-3 Methylene Bromide ND 0.50 0.11 ug/l
75-09-2 Methylene Chloride ND 0.50 0.080 ug/l
78-93-3 Methyl Ethyl Ketone ND 25 0.28 ug/l
108-10-1 4-Methyl-2-pentanone ND 0.50 0.24 ug/l
1634-04-4 Methyl Tert Butyl Ether 20.7 0.50 0.068 ug/l
91-20-3 Naphthalene ND 0.50 0.10 ug/l
103-65-1 n-Propylbenzene ND 0.50 0.22 ug/l
100-42-5 Styrene ND 0.50 0.13 ug/l
75-85-4 Tert-Amyl Alcohol 303 25 0.77 ug/l
994-05-8 Tert-Amyl Methyl Ether 0.42 1.0 0.084 ug/l J
75-65-0 Tert-Butyl Alcohol 410 b 100 10 ug/l
762-75-4 tert-Butyl Formate ND 5.0 0.035 ug/l
630-20-6 1,1,1,2-Tetrachloroethane ND 0.50 0.18 ug/l
79-34-5 1,1,2,2-Tetrachloroethane ND 0.20 0.12 ug/l
127-18-4 Tetrachloroethylene ND 0.50 0.22 ug/l
108-88-3 Toluene ND 0.50 0.29 ug/l
87-61-6 1,2,3-Trichlorobenzene ND 0.50 0.16 ug/l
120-82-1 1,2,4-Trichlorobenzene ND 0.50 0.17 ug/l
71-55-6 1,1,1-Trichloroethane ND 0.50 0.16 ug/l
79-00-5 1,1,2-Trichloroethane ND 0.30 0.17 ug/l
79-01-6 Trichloroethylene ND 0.50 0.18 ug/l
75-69-4 Trichlorofluoromethane ND 0.50 0.073 ug/l
96-18-4 1,2,3-Trichloropropane ND 0.50 0.023 ug/l
95-63-6 1,2,4-Trimethylbenzene ND 0.50 0.15 ug/l
108-67-8 1,3,5-Trimethylbenzene ND 0.50 0.16 ug/l
108-05-4 Vinyl Acetate ND 0.50 0.069 ug/l
75-01-4 Vinyl Chloride ND 0.10 0.075 ug/l
m,p-Xylene ND 1.0 0.34 ug/l
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
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Report of Analysis Page 3 of 3
Client Sample ID:MW-1D
Lab Sample ID:LB5750-2 Date Sampled:08/20/24
Matrix:AQ - Ground Water Date Received:08/23/24
Method:SM 6200B Percent Solids:n/a
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
VOA Special List
CAS No.Compound Result RL MDL Units Q
95-47-6 o-Xylene ND 0.50 0.15 ug/l
1330-20-7 Xylene (total)ND 0.50 0.16 ug/l
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
17060-07-0 1,2-Dichloroethane-D4 94%96%70-130%
2037-26-5 Toluene-D8 101%101%70-130%
460-00-4 4-Bromofluorobenzene 102%101%70-130%
(a) Associated CCV outside of control limits high, sample was ND.
(b) Result is from Run# 2
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
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Report of Analysis Page 1 of 3
Client Sample ID:MW-2
Lab Sample ID:LB5750-3 Date Sampled:08/20/24
Matrix:AQ - Ground Water Date Received:08/23/24
Method:SM 6200B Percent Solids:n/a
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
Run #1 2K0154020.D 50 08/28/24 14:39 JY n/a n/a V2K4357
Run #2
Purge Volume
Run #1 25.0 ml
Run #2
VOA Special List
CAS No.Compound Result RL MDL Units Q
67-64-1 Acetone 312 500 62 ug/l J
71-43-2 Benzene 1510 25 14 ug/l
108-86-1 Bromobenzene ND 25 9.1 ug/l
74-97-5 Bromochloromethane ND 25 6.1 ug/l
75-27-4 Bromodichloromethane ND 25 9.0 ug/l
75-25-2 Bromoform ND 25 5.0 ug/l
104-51-8 n-Butylbenzene ND 25 4.6 ug/l
135-98-8 sec-Butylbenzene ND 25 7.1 ug/l
98-06-6 tert-Butylbenzene ND 25 7.9 ug/l
56-23-5 Carbon Tetrachloride ND 10 4.6 ug/l
108-90-7 Chlorobenzene ND 25 8.2 ug/l
75-00-3 Chloroethane a ND 25 2.8 ug/l
67-66-3 Chloroform ND 25 4.7 ug/l
95-49-8 o-Chlorotoluene ND 25 8.2 ug/l
106-43-4 p-Chlorotoluene ND 25 10 ug/l
124-48-1 Dibromochloromethane ND 10 3.7 ug/l
96-12-8 1,2-Dibromo-3-chloropropane ND 25 6.4 ug/l
106-93-4 1,2-Dibromoethane ND 25 12 ug/l
75-71-8 Dichlorodifluoromethane ND 25 6.1 ug/l
541-73-1 m-Dichlorobenzene ND 25 3.2 ug/l
95-50-1 o-Dichlorobenzene ND 25 9.8 ug/l
106-46-7 p-Dichlorobenzene ND 25 11 ug/l
75-34-3 1,1-Dichloroethane ND 25 5.2 ug/l
107-06-2 1,2-Dichloroethane ND 10 6.1 ug/l
75-35-4 1,1-Dichloroethylene ND 25 4.7 ug/l
156-59-2 cis-1,2-Dichloroethylene ND 25 5.5 ug/l
156-60-5 trans-1,2-Dichloroethylene ND 25 7.7 ug/l
78-87-5 1,2-Dichloropropane ND 15 6.3 ug/l
142-28-9 1,3-Dichloropropane ND 25 10 ug/l
594-20-7 2,2-Dichloropropane ND 25 4.0 ug/l
563-58-6 1,1-Dichloropropene ND 25 5.8 ug/l
10061-01-5 cis-1,3-Dichloropropene ND 10 5.1 ug/l
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
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Report of Analysis Page 2 of 3
Client Sample ID:MW-2
Lab Sample ID:LB5750-3 Date Sampled:08/20/24
Matrix:AQ - Ground Water Date Received:08/23/24
Method:SM 6200B Percent Solids:n/a
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
VOA Special List
CAS No.Compound Result RL MDL Units Q
10061-02-6 trans-1,3-Dichloropropene ND 10 2.8 ug/l
108-20-3 Di-Isopropyl Ether ND 25 3.7 ug/l
624-95-3 3,3-Dimethyl-1-butanol ND 250 91 ug/l
64-17-5 Ethyl Alcohol ND 2500 420 ug/l
100-41-4 Ethylbenzene 2480 25 10 ug/l
637-92-3 Ethyl Tert-Butyl Ether ND 25 2.8 ug/l
591-78-6 2-Hexanone ND 50 21 ug/l
87-68-3 Hexachlorobutadiene ND 10 5.5 ug/l
98-82-8 Isopropylbenzene 76.0 25 6.6 ug/l
99-87-6 p-Isopropyltoluene ND 25 6.5 ug/l
74-83-9 Methyl Bromide ND 25 11 ug/l
74-87-3 Methyl Chloride ND 25 3.3 ug/l
74-95-3 Methylene Bromide ND 25 5.7 ug/l
75-09-2 Methylene Chloride 134 25 4.0 ug/l
78-93-3 Methyl Ethyl Ketone ND 1300 14 ug/l
108-10-1 4-Methyl-2-pentanone ND 25 12 ug/l
1634-04-4 Methyl Tert Butyl Ether 20.2 25 3.4 ug/l J
91-20-3 Naphthalene 765 25 5.0 ug/l
103-65-1 n-Propylbenzene 231 25 11 ug/l
100-42-5 Styrene 59.2 25 6.3 ug/l
75-85-4 Tert-Amyl Alcohol 3740 1300 38 ug/l
994-05-8 Tert-Amyl Methyl Ether ND 50 4.2 ug/l
75-65-0 Tert-Butyl Alcohol ND 500 51 ug/l
762-75-4 tert-Butyl Formate ND 250 1.8 ug/l
630-20-6 1,1,1,2-Tetrachloroethane ND 25 9.2 ug/l
79-34-5 1,1,2,2-Tetrachloroethane ND 10 6.2 ug/l
127-18-4 Tetrachloroethylene ND 25 11 ug/l
108-88-3 Toluene 3800 25 15 ug/l
87-61-6 1,2,3-Trichlorobenzene ND 25 8.0 ug/l
120-82-1 1,2,4-Trichlorobenzene ND 25 8.5 ug/l
71-55-6 1,1,1-Trichloroethane ND 25 8.2 ug/l
79-00-5 1,1,2-Trichloroethane ND 15 8.7 ug/l
79-01-6 Trichloroethylene ND 25 9.0 ug/l
75-69-4 Trichlorofluoromethane ND 25 3.7 ug/l
96-18-4 1,2,3-Trichloropropane ND 25 1.1 ug/l
95-63-6 1,2,4-Trimethylbenzene 1850 25 7.3 ug/l
108-67-8 1,3,5-Trimethylbenzene 463 25 8.1 ug/l
108-05-4 Vinyl Acetate ND 25 3.4 ug/l
75-01-4 Vinyl Chloride ND 5.0 3.8 ug/l
m,p-Xylene 7140 50 17 ug/l
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
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Report of Analysis Page 3 of 3
Client Sample ID:MW-2
Lab Sample ID:LB5750-3 Date Sampled:08/20/24
Matrix:AQ - Ground Water Date Received:08/23/24
Method:SM 6200B Percent Solids:n/a
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
VOA Special List
CAS No.Compound Result RL MDL Units Q
95-47-6 o-Xylene 3290 25 7.4 ug/l
1330-20-7 Xylene (total)10400 25 8.1 ug/l
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
17060-07-0 1,2-Dichloroethane-D4 91%70-130%
2037-26-5 Toluene-D8 102%70-130%
460-00-4 4-Bromofluorobenzene 100%70-130%
(a) Associated CCV outside of control limits high, sample was ND.
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
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Report of Analysis Page 1 of 3
Client Sample ID:MW-3
Lab Sample ID:LB5750-4 Date Sampled:08/20/24
Matrix:AQ - Ground Water Date Received:08/23/24
Method:SM 6200B Percent Solids:n/a
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
Run #1 2K0153990.D 1 08/26/24 15:42 JY n/a n/a V2K4355
Run #2
Purge Volume
Run #1 25.0 ml
Run #2
VOA Special List
CAS No.Compound Result RL MDL Units Q
67-64-1 Acetone ND 10 1.2 ug/l
71-43-2 Benzene ND 0.50 0.27 ug/l
108-86-1 Bromobenzene ND 0.50 0.18 ug/l
74-97-5 Bromochloromethane ND 0.50 0.12 ug/l
75-27-4 Bromodichloromethane ND 0.50 0.18 ug/l
75-25-2 Bromoform ND 0.50 0.10 ug/l
104-51-8 n-Butylbenzene ND 0.50 0.092 ug/l
135-98-8 sec-Butylbenzene ND 0.50 0.14 ug/l
98-06-6 tert-Butylbenzene ND 0.50 0.16 ug/l
56-23-5 Carbon Tetrachloride ND 0.20 0.092 ug/l
108-90-7 Chlorobenzene ND 0.50 0.16 ug/l
75-00-3 Chloroethane ND 0.50 0.055 ug/l
67-66-3 Chloroform ND 0.50 0.094 ug/l
95-49-8 o-Chlorotoluene ND 0.50 0.16 ug/l
106-43-4 p-Chlorotoluene ND 0.50 0.20 ug/l
124-48-1 Dibromochloromethane ND 0.20 0.075 ug/l
96-12-8 1,2-Dibromo-3-chloropropane ND 0.50 0.13 ug/l
106-93-4 1,2-Dibromoethane ND 0.50 0.24 ug/l
75-71-8 Dichlorodifluoromethane ND 0.50 0.12 ug/l
541-73-1 m-Dichlorobenzene ND 0.50 0.063 ug/l
95-50-1 o-Dichlorobenzene ND 0.50 0.20 ug/l
106-46-7 p-Dichlorobenzene ND 0.50 0.22 ug/l
75-34-3 1,1-Dichloroethane ND 0.50 0.10 ug/l
107-06-2 1,2-Dichloroethane ND 0.20 0.12 ug/l
75-35-4 1,1-Dichloroethylene ND 0.50 0.094 ug/l
156-59-2 cis-1,2-Dichloroethylene ND 0.50 0.11 ug/l
156-60-5 trans-1,2-Dichloroethylene ND 0.50 0.15 ug/l
78-87-5 1,2-Dichloropropane ND 0.30 0.13 ug/l
142-28-9 1,3-Dichloropropane ND 0.50 0.21 ug/l
594-20-7 2,2-Dichloropropane ND 0.50 0.079 ug/l
563-58-6 1,1-Dichloropropene ND 0.50 0.12 ug/l
10061-01-5 cis-1,3-Dichloropropene ND 0.20 0.10 ug/l
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
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Report of Analysis Page 2 of 3
Client Sample ID:MW-3
Lab Sample ID:LB5750-4 Date Sampled:08/20/24
Matrix:AQ - Ground Water Date Received:08/23/24
Method:SM 6200B Percent Solids:n/a
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
VOA Special List
CAS No.Compound Result RL MDL Units Q
10061-02-6 trans-1,3-Dichloropropene ND 0.20 0.056 ug/l
108-20-3 Di-Isopropyl Ether ND 0.50 0.073 ug/l
624-95-3 3,3-Dimethyl-1-butanol ND 5.0 1.8 ug/l
64-17-5 Ethyl Alcohol ND 50 8.4 ug/l
100-41-4 Ethylbenzene ND 0.50 0.20 ug/l
637-92-3 Ethyl Tert-Butyl Ether ND 0.50 0.056 ug/l
591-78-6 2-Hexanone ND 1.0 0.42 ug/l
87-68-3 Hexachlorobutadiene ND 0.20 0.11 ug/l
98-82-8 Isopropylbenzene ND 0.50 0.13 ug/l
99-87-6 p-Isopropyltoluene ND 0.50 0.13 ug/l
74-83-9 Methyl Bromide ND 0.50 0.23 ug/l
74-87-3 Methyl Chloride ND 0.50 0.066 ug/l
74-95-3 Methylene Bromide ND 0.50 0.11 ug/l
75-09-2 Methylene Chloride ND 0.50 0.080 ug/l
78-93-3 Methyl Ethyl Ketone ND 25 0.28 ug/l
108-10-1 4-Methyl-2-pentanone ND 0.50 0.24 ug/l
1634-04-4 Methyl Tert Butyl Ether ND 0.50 0.068 ug/l
91-20-3 Naphthalene ND 0.50 0.10 ug/l
103-65-1 n-Propylbenzene ND 0.50 0.22 ug/l
100-42-5 Styrene ND 0.50 0.13 ug/l
75-85-4 Tert-Amyl Alcohol ND 25 0.77 ug/l
994-05-8 Tert-Amyl Methyl Ether ND 1.0 0.084 ug/l
75-65-0 Tert-Butyl Alcohol ND 10 1.0 ug/l
762-75-4 tert-Butyl Formate ND 5.0 0.035 ug/l
630-20-6 1,1,1,2-Tetrachloroethane ND 0.50 0.18 ug/l
79-34-5 1,1,2,2-Tetrachloroethane ND 0.20 0.12 ug/l
127-18-4 Tetrachloroethylene ND 0.50 0.22 ug/l
108-88-3 Toluene ND 0.50 0.29 ug/l
87-61-6 1,2,3-Trichlorobenzene ND 0.50 0.16 ug/l
120-82-1 1,2,4-Trichlorobenzene ND 0.50 0.17 ug/l
71-55-6 1,1,1-Trichloroethane ND 0.50 0.16 ug/l
79-00-5 1,1,2-Trichloroethane ND 0.30 0.17 ug/l
79-01-6 Trichloroethylene ND 0.50 0.18 ug/l
75-69-4 Trichlorofluoromethane ND 0.50 0.073 ug/l
96-18-4 1,2,3-Trichloropropane ND 0.50 0.023 ug/l
95-63-6 1,2,4-Trimethylbenzene ND 0.50 0.15 ug/l
108-67-8 1,3,5-Trimethylbenzene ND 0.50 0.16 ug/l
108-05-4 Vinyl Acetate ND 0.50 0.069 ug/l
75-01-4 Vinyl Chloride ND 0.10 0.075 ug/l
m,p-Xylene ND 1.0 0.34 ug/l
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
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Client Sample ID:MW-3
Lab Sample ID:LB5750-4 Date Sampled:08/20/24
Matrix:AQ - Ground Water Date Received:08/23/24
Method:SM 6200B Percent Solids:n/a
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
VOA Special List
CAS No.Compound Result RL MDL Units Q
95-47-6 o-Xylene ND 0.50 0.15 ug/l
1330-20-7 Xylene (total)ND 0.50 0.16 ug/l
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
17060-07-0 1,2-Dichloroethane-D4 98%70-130%
2037-26-5 Toluene-D8 101%70-130%
460-00-4 4-Bromofluorobenzene 103%70-130%
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
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Client Sample ID:MW-5
Lab Sample ID:LB5750-5 Date Sampled:08/20/24
Matrix:AQ - Ground Water Date Received:08/23/24
Method:SM 6200B Percent Solids:n/a
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
Run #1 2K0153992.D 200 08/26/24 16:37 JY n/a n/a V2K4355
Run #2 2K0154019.D 500 08/28/24 14:12 JY n/a n/a V2K4357
Purge Volume
Run #1 25.0 ml
Run #2 25.0 ml
VOA Special List
CAS No.Compound Result RL MDL Units Q
67-64-1 Acetone ND 2000 250 ug/l
71-43-2 Benzene 17600 100 54 ug/l
108-86-1 Bromobenzene ND 100 36 ug/l
74-97-5 Bromochloromethane ND 100 24 ug/l
75-27-4 Bromodichloromethane ND 100 36 ug/l
75-25-2 Bromoform ND 100 20 ug/l
104-51-8 n-Butylbenzene ND 100 18 ug/l
135-98-8 sec-Butylbenzene ND 100 28 ug/l
98-06-6 tert-Butylbenzene ND 100 32 ug/l
56-23-5 Carbon Tetrachloride ND 40 18 ug/l
108-90-7 Chlorobenzene ND 100 33 ug/l
75-00-3 Chloroethane ND 100 11 ug/l
67-66-3 Chloroform ND 100 19 ug/l
95-49-8 o-Chlorotoluene ND 100 33 ug/l
106-43-4 p-Chlorotoluene ND 100 40 ug/l
124-48-1 Dibromochloromethane ND 40 15 ug/l
96-12-8 1,2-Dibromo-3-chloropropane ND 100 26 ug/l
106-93-4 1,2-Dibromoethane ND 100 47 ug/l
75-71-8 Dichlorodifluoromethane ND 100 24 ug/l
541-73-1 m-Dichlorobenzene ND 100 13 ug/l
95-50-1 o-Dichlorobenzene ND 100 39 ug/l
106-46-7 p-Dichlorobenzene ND 100 43 ug/l
75-34-3 1,1-Dichloroethane ND 100 21 ug/l
107-06-2 1,2-Dichloroethane ND 40 24 ug/l
75-35-4 1,1-Dichloroethylene ND 100 19 ug/l
156-59-2 cis-1,2-Dichloroethylene ND 100 22 ug/l
156-60-5 trans-1,2-Dichloroethylene ND 100 31 ug/l
78-87-5 1,2-Dichloropropane ND 60 25 ug/l
142-28-9 1,3-Dichloropropane ND 100 41 ug/l
594-20-7 2,2-Dichloropropane ND 100 16 ug/l
563-58-6 1,1-Dichloropropene ND 100 23 ug/l
10061-01-5 cis-1,3-Dichloropropene ND 40 20 ug/l
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
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Client Sample ID:MW-5
Lab Sample ID:LB5750-5 Date Sampled:08/20/24
Matrix:AQ - Ground Water Date Received:08/23/24
Method:SM 6200B Percent Solids:n/a
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
VOA Special List
CAS No.Compound Result RL MDL Units Q
10061-02-6 trans-1,3-Dichloropropene ND 40 11 ug/l
108-20-3 Di-Isopropyl Ether 280 100 15 ug/l
624-95-3 3,3-Dimethyl-1-butanol ND 1000 360 ug/l
64-17-5 Ethyl Alcohol ND 10000 1700 ug/l
100-41-4 Ethylbenzene 2840 100 40 ug/l
637-92-3 Ethyl Tert-Butyl Ether ND 100 11 ug/l
591-78-6 2-Hexanone ND 200 84 ug/l
87-68-3 Hexachlorobutadiene ND 40 22 ug/l
98-82-8 Isopropylbenzene 123 100 26 ug/l
99-87-6 p-Isopropyltoluene ND 100 26 ug/l
74-83-9 Methyl Bromide ND 100 46 ug/l
74-87-3 Methyl Chloride ND 100 13 ug/l
74-95-3 Methylene Bromide ND 100 23 ug/l
75-09-2 Methylene Chloride 47.1 100 16 ug/l J
78-93-3 Methyl Ethyl Ketone ND 5000 57 ug/l
108-10-1 4-Methyl-2-pentanone ND 100 48 ug/l
1634-04-4 Methyl Tert Butyl Ether 1540 100 14 ug/l
91-20-3 Naphthalene 758 100 20 ug/l
103-65-1 n-Propylbenzene 388 100 44 ug/l
100-42-5 Styrene 63.3 100 25 ug/l J
75-85-4 Tert-Amyl Alcohol 18600 5000 150 ug/l
994-05-8 Tert-Amyl Methyl Ether ND 200 17 ug/l
75-65-0 Tert-Butyl Alcohol 3270 2000 200 ug/l
762-75-4 tert-Butyl Formate ND 1000 7.0 ug/l
630-20-6 1,1,1,2-Tetrachloroethane ND 100 37 ug/l
79-34-5 1,1,2,2-Tetrachloroethane ND 40 25 ug/l
127-18-4 Tetrachloroethylene ND 100 45 ug/l
108-88-3 Toluene 29100 a 250 150 ug/l
87-61-6 1,2,3-Trichlorobenzene ND 100 32 ug/l
120-82-1 1,2,4-Trichlorobenzene ND 100 34 ug/l
71-55-6 1,1,1-Trichloroethane ND 100 33 ug/l
79-00-5 1,1,2-Trichloroethane ND 60 35 ug/l
79-01-6 Trichloroethylene ND 100 36 ug/l
75-69-4 Trichlorofluoromethane ND 100 15 ug/l
96-18-4 1,2,3-Trichloropropane ND 100 4.5 ug/l
95-63-6 1,2,4-Trimethylbenzene 2900 100 29 ug/l
108-67-8 1,3,5-Trimethylbenzene 767 100 32 ug/l
108-05-4 Vinyl Acetate ND 100 14 ug/l
75-01-4 Vinyl Chloride ND 20 15 ug/l
m,p-Xylene 9650 200 67 ug/l
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
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Client Sample ID:MW-5
Lab Sample ID:LB5750-5 Date Sampled:08/20/24
Matrix:AQ - Ground Water Date Received:08/23/24
Method:SM 6200B Percent Solids:n/a
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
VOA Special List
CAS No.Compound Result RL MDL Units Q
95-47-6 o-Xylene 4860 100 30 ug/l
1330-20-7 Xylene (total)14500 100 32 ug/l
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
17060-07-0 1,2-Dichloroethane-D4 96%94%70-130%
2037-26-5 Toluene-D8 102%103%70-130%
460-00-4 4-Bromofluorobenzene 103%105%70-130%
(a) Result is from Run# 2
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
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Client Sample ID:MW-6
Lab Sample ID:LB5750-6 Date Sampled:08/20/24
Matrix:AQ - Ground Water Date Received:08/23/24
Method:SM 6200B Percent Solids:n/a
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
Run #1 2K0154017.D 1 08/28/24 13:17 JY n/a n/a V2K4357
Run #2 a 2K0153993.D 20 08/26/24 17:04 JY n/a n/a V2K4355
Purge Volume
Run #1 25.0 ml
Run #2 25.0 ml
VOA Special List
CAS No.Compound Result RL MDL Units Q
67-64-1 Acetone 32.5 10 1.2 ug/l
71-43-2 Benzene 9.4 0.50 0.27 ug/l
108-86-1 Bromobenzene ND 0.50 0.18 ug/l
74-97-5 Bromochloromethane ND 0.50 0.12 ug/l
75-27-4 Bromodichloromethane ND 0.50 0.18 ug/l
75-25-2 Bromoform ND 0.50 0.10 ug/l
104-51-8 n-Butylbenzene ND 0.50 0.092 ug/l
135-98-8 sec-Butylbenzene ND 0.50 0.14 ug/l
98-06-6 tert-Butylbenzene ND 0.50 0.16 ug/l
56-23-5 Carbon Tetrachloride ND 0.20 0.092 ug/l
108-90-7 Chlorobenzene ND 0.50 0.16 ug/l
75-00-3 Chloroethane b ND 0.50 0.055 ug/l
67-66-3 Chloroform ND 0.50 0.094 ug/l
95-49-8 o-Chlorotoluene ND 0.50 0.16 ug/l
106-43-4 p-Chlorotoluene ND 0.50 0.20 ug/l
124-48-1 Dibromochloromethane ND 0.20 0.075 ug/l
96-12-8 1,2-Dibromo-3-chloropropane ND 0.50 0.13 ug/l
106-93-4 1,2-Dibromoethane ND 0.50 0.24 ug/l
75-71-8 Dichlorodifluoromethane ND 0.50 0.12 ug/l
541-73-1 m-Dichlorobenzene ND 0.50 0.063 ug/l
95-50-1 o-Dichlorobenzene ND 0.50 0.20 ug/l
106-46-7 p-Dichlorobenzene ND 0.50 0.22 ug/l
75-34-3 1,1-Dichloroethane ND 0.50 0.10 ug/l
107-06-2 1,2-Dichloroethane ND 0.20 0.12 ug/l
75-35-4 1,1-Dichloroethylene ND 0.50 0.094 ug/l
156-59-2 cis-1,2-Dichloroethylene ND 0.50 0.11 ug/l
156-60-5 trans-1,2-Dichloroethylene ND 0.50 0.15 ug/l
78-87-5 1,2-Dichloropropane ND 0.30 0.13 ug/l
142-28-9 1,3-Dichloropropane ND 0.50 0.21 ug/l
594-20-7 2,2-Dichloropropane ND 0.50 0.079 ug/l
563-58-6 1,1-Dichloropropene ND 0.50 0.12 ug/l
10061-01-5 cis-1,3-Dichloropropene ND 0.20 0.10 ug/l
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
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Client Sample ID:MW-6
Lab Sample ID:LB5750-6 Date Sampled:08/20/24
Matrix:AQ - Ground Water Date Received:08/23/24
Method:SM 6200B Percent Solids:n/a
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
VOA Special List
CAS No.Compound Result RL MDL Units Q
10061-02-6 trans-1,3-Dichloropropene ND 0.20 0.056 ug/l
108-20-3 Di-Isopropyl Ether ND 0.50 0.073 ug/l
624-95-3 3,3-Dimethyl-1-butanol ND 5.0 1.8 ug/l
64-17-5 Ethyl Alcohol ND 50 8.4 ug/l
100-41-4 Ethylbenzene 59.5 0.50 0.20 ug/l
637-92-3 Ethyl Tert-Butyl Ether ND 0.50 0.056 ug/l
591-78-6 2-Hexanone ND 1.0 0.42 ug/l
87-68-3 Hexachlorobutadiene ND 0.20 0.11 ug/l
98-82-8 Isopropylbenzene 6.3 0.50 0.13 ug/l
99-87-6 p-Isopropyltoluene 0.66 0.50 0.13 ug/l
74-83-9 Methyl Bromide ND 0.50 0.23 ug/l
74-87-3 Methyl Chloride ND 0.50 0.066 ug/l
74-95-3 Methylene Bromide ND 0.50 0.11 ug/l
75-09-2 Methylene Chloride ND 0.50 0.080 ug/l
78-93-3 Methyl Ethyl Ketone ND 25 0.28 ug/l
108-10-1 4-Methyl-2-pentanone ND 0.50 0.24 ug/l
1634-04-4 Methyl Tert Butyl Ether ND 0.50 0.068 ug/l
91-20-3 Naphthalene 28.3 0.50 0.10 ug/l
103-65-1 n-Propylbenzene 19.8 0.50 0.22 ug/l
100-42-5 Styrene 0.28 0.50 0.13 ug/l J
75-85-4 Tert-Amyl Alcohol ND 25 0.77 ug/l
994-05-8 Tert-Amyl Methyl Ether ND 1.0 0.084 ug/l
75-65-0 Tert-Butyl Alcohol ND 10 1.0 ug/l
762-75-4 tert-Butyl Formate ND 5.0 0.035 ug/l
630-20-6 1,1,1,2-Tetrachloroethane ND 0.50 0.18 ug/l
79-34-5 1,1,2,2-Tetrachloroethane ND 0.20 0.12 ug/l
127-18-4 Tetrachloroethylene ND 0.50 0.22 ug/l
108-88-3 Toluene 25.5 0.50 0.29 ug/l
87-61-6 1,2,3-Trichlorobenzene ND 0.50 0.16 ug/l
120-82-1 1,2,4-Trichlorobenzene ND 0.50 0.17 ug/l
71-55-6 1,1,1-Trichloroethane ND 0.50 0.16 ug/l
79-00-5 1,1,2-Trichloroethane ND 0.30 0.17 ug/l
79-01-6 Trichloroethylene ND 0.50 0.18 ug/l
75-69-4 Trichlorofluoromethane ND 0.50 0.073 ug/l
96-18-4 1,2,3-Trichloropropane 1.1 0.50 0.023 ug/l
95-63-6 1,2,4-Trimethylbenzene 85.4 0.50 0.15 ug/l
108-67-8 1,3,5-Trimethylbenzene 18.6 0.50 0.16 ug/l
108-05-4 Vinyl Acetate 1.8 0.50 0.069 ug/l
75-01-4 Vinyl Chloride ND 0.10 0.075 ug/l
m,p-Xylene 82.5 1.0 0.34 ug/l
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
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Client Sample ID:MW-6
Lab Sample ID:LB5750-6 Date Sampled:08/20/24
Matrix:AQ - Ground Water Date Received:08/23/24
Method:SM 6200B Percent Solids:n/a
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
VOA Special List
CAS No.Compound Result RL MDL Units Q
95-47-6 o-Xylene 43.7 0.50 0.15 ug/l
1330-20-7 Xylene (total)126 0.50 0.16 ug/l
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
17060-07-0 1,2-Dichloroethane-D4 98%96%70-130%
2037-26-5 Toluene-D8 98%100%70-130%
460-00-4 4-Bromofluorobenzene 104%102%70-130%
(a) Sample used for QC purposes only.
(b) Associated CCV outside of control limits high, sample was ND.
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
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Client Sample ID:MW-7
Lab Sample ID:LB5750-7 Date Sampled:08/20/24
Matrix:AQ - Ground Water Date Received:08/23/24
Method:SM 6200B Percent Solids:n/a
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
Run #1 2K0154018.D 1 08/28/24 13:45 JY n/a n/a V2K4357
Run #2
Purge Volume
Run #1 25.0 ml
Run #2
VOA Special List
CAS No.Compound Result RL MDL Units Q
67-64-1 Acetone ND 10 1.2 ug/l
71-43-2 Benzene ND 0.50 0.27 ug/l
108-86-1 Bromobenzene ND 0.50 0.18 ug/l
74-97-5 Bromochloromethane ND 0.50 0.12 ug/l
75-27-4 Bromodichloromethane ND 0.50 0.18 ug/l
75-25-2 Bromoform ND 0.50 0.10 ug/l
104-51-8 n-Butylbenzene ND 0.50 0.092 ug/l
135-98-8 sec-Butylbenzene ND 0.50 0.14 ug/l
98-06-6 tert-Butylbenzene ND 0.50 0.16 ug/l
56-23-5 Carbon Tetrachloride ND 0.20 0.092 ug/l
108-90-7 Chlorobenzene ND 0.50 0.16 ug/l
75-00-3 Chloroethane a ND 0.50 0.055 ug/l
67-66-3 Chloroform ND 0.50 0.094 ug/l
95-49-8 o-Chlorotoluene ND 0.50 0.16 ug/l
106-43-4 p-Chlorotoluene ND 0.50 0.20 ug/l
124-48-1 Dibromochloromethane ND 0.20 0.075 ug/l
96-12-8 1,2-Dibromo-3-chloropropane ND 0.50 0.13 ug/l
106-93-4 1,2-Dibromoethane ND 0.50 0.24 ug/l
75-71-8 Dichlorodifluoromethane ND 0.50 0.12 ug/l
541-73-1 m-Dichlorobenzene ND 0.50 0.063 ug/l
95-50-1 o-Dichlorobenzene ND 0.50 0.20 ug/l
106-46-7 p-Dichlorobenzene ND 0.50 0.22 ug/l
75-34-3 1,1-Dichloroethane ND 0.50 0.10 ug/l
107-06-2 1,2-Dichloroethane 0.62 0.20 0.12 ug/l
75-35-4 1,1-Dichloroethylene ND 0.50 0.094 ug/l
156-59-2 cis-1,2-Dichloroethylene ND 0.50 0.11 ug/l
156-60-5 trans-1,2-Dichloroethylene ND 0.50 0.15 ug/l
78-87-5 1,2-Dichloropropane ND 0.30 0.13 ug/l
142-28-9 1,3-Dichloropropane ND 0.50 0.21 ug/l
594-20-7 2,2-Dichloropropane ND 0.50 0.079 ug/l
563-58-6 1,1-Dichloropropene ND 0.50 0.12 ug/l
10061-01-5 cis-1,3-Dichloropropene ND 0.20 0.10 ug/l
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
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Client Sample ID:MW-7
Lab Sample ID:LB5750-7 Date Sampled:08/20/24
Matrix:AQ - Ground Water Date Received:08/23/24
Method:SM 6200B Percent Solids:n/a
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
VOA Special List
CAS No.Compound Result RL MDL Units Q
10061-02-6 trans-1,3-Dichloropropene ND 0.20 0.056 ug/l
108-20-3 Di-Isopropyl Ether 18.7 0.50 0.073 ug/l
624-95-3 3,3-Dimethyl-1-butanol ND 5.0 1.8 ug/l
64-17-5 Ethyl Alcohol ND 50 8.4 ug/l
100-41-4 Ethylbenzene ND 0.50 0.20 ug/l
637-92-3 Ethyl Tert-Butyl Ether ND 0.50 0.056 ug/l
591-78-6 2-Hexanone ND 1.0 0.42 ug/l
87-68-3 Hexachlorobutadiene ND 0.20 0.11 ug/l
98-82-8 Isopropylbenzene 0.19 0.50 0.13 ug/l J
99-87-6 p-Isopropyltoluene ND 0.50 0.13 ug/l
74-83-9 Methyl Bromide ND 0.50 0.23 ug/l
74-87-3 Methyl Chloride 0.27 0.50 0.066 ug/l J
74-95-3 Methylene Bromide ND 0.50 0.11 ug/l
75-09-2 Methylene Chloride ND 0.50 0.080 ug/l
78-93-3 Methyl Ethyl Ketone ND 25 0.28 ug/l
108-10-1 4-Methyl-2-pentanone ND 0.50 0.24 ug/l
1634-04-4 Methyl Tert Butyl Ether 7.9 0.50 0.068 ug/l
91-20-3 Naphthalene 0.27 0.50 0.10 ug/l J
103-65-1 n-Propylbenzene ND 0.50 0.22 ug/l
100-42-5 Styrene ND 0.50 0.13 ug/l
75-85-4 Tert-Amyl Alcohol 13.2 25 0.77 ug/l J
994-05-8 Tert-Amyl Methyl Ether ND 1.0 0.084 ug/l
75-65-0 Tert-Butyl Alcohol 55.1 10 1.0 ug/l
762-75-4 tert-Butyl Formate ND 5.0 0.035 ug/l
630-20-6 1,1,1,2-Tetrachloroethane ND 0.50 0.18 ug/l
79-34-5 1,1,2,2-Tetrachloroethane ND 0.20 0.12 ug/l
127-18-4 Tetrachloroethylene ND 0.50 0.22 ug/l
108-88-3 Toluene ND 0.50 0.29 ug/l
87-61-6 1,2,3-Trichlorobenzene ND 0.50 0.16 ug/l
120-82-1 1,2,4-Trichlorobenzene ND 0.50 0.17 ug/l
71-55-6 1,1,1-Trichloroethane ND 0.50 0.16 ug/l
79-00-5 1,1,2-Trichloroethane ND 0.30 0.17 ug/l
79-01-6 Trichloroethylene ND 0.50 0.18 ug/l
75-69-4 Trichlorofluoromethane ND 0.50 0.073 ug/l
96-18-4 1,2,3-Trichloropropane ND 0.50 0.023 ug/l
95-63-6 1,2,4-Trimethylbenzene ND 0.50 0.15 ug/l
108-67-8 1,3,5-Trimethylbenzene ND 0.50 0.16 ug/l
108-05-4 Vinyl Acetate 1.4 0.50 0.069 ug/l
75-01-4 Vinyl Chloride ND 0.10 0.075 ug/l
m,p-Xylene ND 1.0 0.34 ug/l
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
28 of 52
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SGS North America Inc.
Report of Analysis Page 3 of 3
Client Sample ID:MW-7
Lab Sample ID:LB5750-7 Date Sampled:08/20/24
Matrix:AQ - Ground Water Date Received:08/23/24
Method:SM 6200B Percent Solids:n/a
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
VOA Special List
CAS No.Compound Result RL MDL Units Q
95-47-6 o-Xylene ND 0.50 0.15 ug/l
1330-20-7 Xylene (total)ND 0.50 0.16 ug/l
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
17060-07-0 1,2-Dichloroethane-D4 95%70-130%
2037-26-5 Toluene-D8 100%70-130%
460-00-4 4-Bromofluorobenzene 105%70-130%
(a) Associated CCV outside of control limits high, sample was ND.
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
29 of 52
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SGS North America Inc.
Misc. Forms
Custody Documents and Other Forms
Includes the following where applicable:
 Chain of Custody
Scott, LA
Section 5
30 of 52
LB5750
5
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LIQ - Other Liquid
AIR - Air
SOL - Other Solid
FB - Field Blank
EB-Equiprent Blank
RB - Rinse Blank
TB - Trip Blank
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Note: Sample inventory is verified upon receipt in the
E 5 Businoss Oays RUSH
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E 3 Bu3ino.3 O.ys RUSH
E 2 Business oays RUSH
E 1 Buslness oay EMERGENCY
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10 Business Oays Approved By (SGS PM): / Date:
& Rush T/A data available via Lablink.needed for TAT
E commorcial"A" (Lewl'l) l--l rnnp
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Commercial "A' = Results Only,
Commercial "8" = Results + QC Summary
+ Partial Raw DataCommercial "C" = Results + QC
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Seal I
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http://www.sgs.com/en/terms-and-cond itions.
Client /lnformation
LB5750: Chain of Custody
Page 1 of 3
31 of 52
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LB5750: Chain of Custody
Page 2 of 3
32 of 52
LB5750
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5.
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Job Number:LB5750 Client:ATC
Date / Time Received:8/23/2024 8:30:00 AM Delivery Method:FEDEX
Project:RM 6177
4. No. Coolers:1
Airbill #'s:778125154598
Cooler Security
1. Custody Seals Present:
Y or N
2. Custody Seals Intact:
3. COC Present:
4. Smpl Dates/Time OK
2. Cooler temp verification:
Cooler Temperature Y or N
1. Temp criteria achieved:
3. Cooler media:Ice (direct contact)
Quality Control Preservatio Y or N N/A
1. Trip Blank present / cooler:
2. Trip Blank listed on COC:
3. Samples preserved properly:
4. VOCs headspace free:
Sample Integrity - Documentation Y or N
1. Sample labels present on bottles:
2. Container labeling complete:
3. Sample container label / COC agree:
Sample Integrity - Condition Y or N
1. Sample recvd within HT:
3. Condition of sample:
2. All containers accounted for:
Sample Integrity - Instructions
1. Analysis requested is clear:
2. Bottles received for unspecified tests
3. Sufficient volume recvd for analysis:
4. Compositing instructions clear:
5. Filtering instructions clear:
Intact
Y or N
Comments
Y or N N/A
Cooler Temps (Raw Measured) °C:
Cooler Temps (Corrected) °C:
Cooler 1: (3.8);
Cooler 1: (3.8);
SM089-03Rev. Date 12/7/17
SGS Sample Receipt Summary
Test Strip Lot #s:pH 1-12:pH 12+:Other: (Specify)
LB5750: Chain of Custody
Page 3 of 3
33 of 52
LB5750
5
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SGS North America Inc.
MS Volatiles
QC Data Summaries
Includes the following where applicable:
 Method Blank Summaries
 Blank Spike Summaries
 Matrix Spike and Duplicate Summaries
Scott, LA
Section 6
34 of 52
LB5750
6
Method Blank Summary Page 1 of 3
Job Number:LB5750
Account:ATCNCR Atlas
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V2K4355-MB1 2K0153981.D 1 08/26/24 JY n/a n/a V2K4355
The QC reported here applies to the following samples:Method: SM 6200B
LB5750-1, LB5750-2, LB5750-4, LB5750-5
CAS No.Compound Result RL MDL Units Q
67-64-1 Acetone ND 10 1.2 ug/l
71-43-2 Benzene ND 0.50 0.27 ug/l
108-86-1 Bromobenzene ND 0.50 0.18 ug/l
74-97-5 Bromochloromethane ND 0.50 0.12 ug/l
75-27-4 Bromodichloromethane ND 0.50 0.18 ug/l
75-25-2 Bromoform ND 0.50 0.10 ug/l
104-51-8 n-Butylbenzene ND 0.50 0.092 ug/l
135-98-8 sec-Butylbenzene ND 0.50 0.14 ug/l
98-06-6 tert-Butylbenzene ND 0.50 0.16 ug/l
56-23-5 Carbon Tetrachloride ND 0.20 0.092 ug/l
108-90-7 Chlorobenzene ND 0.50 0.16 ug/l
75-00-3 Chloroethane ND 0.50 0.055 ug/l
67-66-3 Chloroform ND 0.50 0.094 ug/l
95-49-8 o-Chlorotoluene ND 0.50 0.16 ug/l
106-43-4 p-Chlorotoluene ND 0.50 0.20 ug/l
124-48-1 Dibromochloromethane ND 0.20 0.075 ug/l
96-12-8 1,2-Dibromo-3-chloropropane ND 0.50 0.13 ug/l
106-93-4 1,2-Dibromoethane ND 0.50 0.24 ug/l
75-71-8 Dichlorodifluoromethane ND 0.50 0.12 ug/l
541-73-1 m-Dichlorobenzene ND 0.50 0.063 ug/l
95-50-1 o-Dichlorobenzene ND 0.50 0.20 ug/l
106-46-7 p-Dichlorobenzene ND 0.50 0.22 ug/l
75-34-3 1,1-Dichloroethane ND 0.50 0.10 ug/l
107-06-2 1,2-Dichloroethane ND 0.20 0.12 ug/l
75-35-4 1,1-Dichloroethylene ND 0.50 0.094 ug/l
156-59-2 cis-1,2-Dichloroethylene ND 0.50 0.11 ug/l
156-60-5 trans-1,2-Dichloroethylene ND 0.50 0.15 ug/l
78-87-5 1,2-Dichloropropane ND 0.30 0.13 ug/l
142-28-9 1,3-Dichloropropane ND 0.50 0.21 ug/l
594-20-7 2,2-Dichloropropane ND 0.50 0.079 ug/l
563-58-6 1,1-Dichloropropene ND 0.50 0.12 ug/l
10061-01-5 cis-1,3-Dichloropropene ND 0.20 0.10 ug/l
10061-02-6 trans-1,3-Dichloropropene ND 0.20 0.056 ug/l
108-20-3 Di-Isopropyl Ether ND 0.50 0.073 ug/l
624-95-3 3,3-Dimethyl-1-butanol ND 5.0 1.8 ug/l
64-17-5 Ethyl Alcohol ND 50 8.4 ug/l
35 of 52
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Method Blank Summary Page 2 of 3
Job Number:LB5750
Account:ATCNCR Atlas
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V2K4355-MB1 2K0153981.D 1 08/26/24 JY n/a n/a V2K4355
The QC reported here applies to the following samples:Method: SM 6200B
LB5750-1, LB5750-2, LB5750-4, LB5750-5
CAS No.Compound Result RL MDL Units Q
100-41-4 Ethylbenzene ND 0.50 0.20 ug/l
637-92-3 Ethyl Tert-Butyl Ether ND 0.50 0.056 ug/l
591-78-6 2-Hexanone ND 1.0 0.42 ug/l
87-68-3 Hexachlorobutadiene 0.22 0.20 0.11 ug/l
98-82-8 Isopropylbenzene ND 0.50 0.13 ug/l
99-87-6 p-Isopropyltoluene ND 0.50 0.13 ug/l
74-83-9 Methyl Bromide ND 0.50 0.23 ug/l
74-87-3 Methyl Chloride ND 0.50 0.066 ug/l
74-95-3 Methylene Bromide ND 0.50 0.11 ug/l
75-09-2 Methylene Chloride ND 0.50 0.080 ug/l
78-93-3 Methyl Ethyl Ketone ND 25 0.28 ug/l
108-10-1 4-Methyl-2-pentanone ND 0.50 0.24 ug/l
1634-04-4 Methyl Tert Butyl Ether ND 0.50 0.068 ug/l
91-20-3 Naphthalene ND 0.50 0.10 ug/l
103-65-1 n-Propylbenzene ND 0.50 0.22 ug/l
100-42-5 Styrene ND 0.50 0.13 ug/l
75-85-4 Tert-Amyl Alcohol ND 25 0.77 ug/l
994-05-8 Tert-Amyl Methyl Ether ND 1.0 0.084 ug/l
75-65-0 Tert-Butyl Alcohol ND 10 1.0 ug/l
762-75-4 tert-Butyl Formate ND 5.0 0.035 ug/l
630-20-6 1,1,1,2-Tetrachloroethane ND 0.50 0.18 ug/l
79-34-5 1,1,2,2-Tetrachloroethane ND 0.20 0.12 ug/l
127-18-4 Tetrachloroethylene ND 0.50 0.22 ug/l
108-88-3 Toluene ND 0.50 0.29 ug/l
87-61-6 1,2,3-Trichlorobenzene ND 0.50 0.16 ug/l
120-82-1 1,2,4-Trichlorobenzene ND 0.50 0.17 ug/l
71-55-6 1,1,1-Trichloroethane ND 0.50 0.16 ug/l
79-00-5 1,1,2-Trichloroethane ND 0.30 0.17 ug/l
79-01-6 Trichloroethylene ND 0.50 0.18 ug/l
75-69-4 Trichlorofluoromethane ND 0.50 0.073 ug/l
96-18-4 1,2,3-Trichloropropane ND 0.50 0.023 ug/l
95-63-6 1,2,4-Trimethylbenzene ND 0.50 0.15 ug/l
108-67-8 1,3,5-Trimethylbenzene ND 0.50 0.16 ug/l
108-05-4 Vinyl Acetate ND 0.50 0.069 ug/l
75-01-4 Vinyl Chloride ND 0.10 0.075 ug/l
m,p-Xylene ND 1.0 0.34 ug/l
36 of 52
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Method Blank Summary Page 3 of 3
Job Number:LB5750
Account:ATCNCR Atlas
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V2K4355-MB1 2K0153981.D 1 08/26/24 JY n/a n/a V2K4355
The QC reported here applies to the following samples:Method: SM 6200B
LB5750-1, LB5750-2, LB5750-4, LB5750-5
CAS No.Compound Result RL MDL Units Q
95-47-6 o-Xylene ND 0.50 0.15 ug/l
1330-20-7 Xylene (total)ND 0.50 0.16 ug/l
CAS No.Surrogate Recoveries Limits
17060-07-0 1,2-Dichloroethane-D4 98%70-130%
2037-26-5 Toluene-D8 100%70-130%
460-00-4 4-Bromofluorobenzene 101%70-130%
37 of 52
LB5750
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Method Blank Summary Page 1 of 3
Job Number:LB5750
Account:ATCNCR Atlas
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V2K4357-MB1 2K0154015.D 1 08/28/24 JY n/a n/a V2K4357
The QC reported here applies to the following samples:Method: SM 6200B
LB5750-2, LB5750-3, LB5750-5, LB5750-6, LB5750-7
CAS No.Compound Result RL MDL Units Q
67-64-1 Acetone ND 10 1.2 ug/l
71-43-2 Benzene ND 0.50 0.27 ug/l
108-86-1 Bromobenzene ND 0.50 0.18 ug/l
74-97-5 Bromochloromethane ND 0.50 0.12 ug/l
75-27-4 Bromodichloromethane ND 0.50 0.18 ug/l
75-25-2 Bromoform ND 0.50 0.10 ug/l
104-51-8 n-Butylbenzene ND 0.50 0.092 ug/l
135-98-8 sec-Butylbenzene ND 0.50 0.14 ug/l
98-06-6 tert-Butylbenzene ND 0.50 0.16 ug/l
56-23-5 Carbon Tetrachloride ND 0.20 0.092 ug/l
108-90-7 Chlorobenzene ND 0.50 0.16 ug/l
75-00-3 Chloroethane ND 0.50 0.055 ug/l
67-66-3 Chloroform ND 0.50 0.094 ug/l
95-49-8 o-Chlorotoluene ND 0.50 0.16 ug/l
106-43-4 p-Chlorotoluene ND 0.50 0.20 ug/l
124-48-1 Dibromochloromethane ND 0.20 0.075 ug/l
96-12-8 1,2-Dibromo-3-chloropropane ND 0.50 0.13 ug/l
106-93-4 1,2-Dibromoethane ND 0.50 0.24 ug/l
75-71-8 Dichlorodifluoromethane ND 0.50 0.12 ug/l
541-73-1 m-Dichlorobenzene ND 0.50 0.063 ug/l
95-50-1 o-Dichlorobenzene ND 0.50 0.20 ug/l
106-46-7 p-Dichlorobenzene ND 0.50 0.22 ug/l
75-34-3 1,1-Dichloroethane ND 0.50 0.10 ug/l
107-06-2 1,2-Dichloroethane ND 0.20 0.12 ug/l
75-35-4 1,1-Dichloroethylene ND 0.50 0.094 ug/l
156-59-2 cis-1,2-Dichloroethylene ND 0.50 0.11 ug/l
156-60-5 trans-1,2-Dichloroethylene ND 0.50 0.15 ug/l
78-87-5 1,2-Dichloropropane ND 0.30 0.13 ug/l
142-28-9 1,3-Dichloropropane ND 0.50 0.21 ug/l
594-20-7 2,2-Dichloropropane ND 0.50 0.079 ug/l
563-58-6 1,1-Dichloropropene ND 0.50 0.12 ug/l
10061-01-5 cis-1,3-Dichloropropene ND 0.20 0.10 ug/l
10061-02-6 trans-1,3-Dichloropropene ND 0.20 0.056 ug/l
108-20-3 Di-Isopropyl Ether ND 0.50 0.073 ug/l
624-95-3 3,3-Dimethyl-1-butanol ND 5.0 1.8 ug/l
64-17-5 Ethyl Alcohol 10 50 8.4 ug/l J
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Method Blank Summary Page 2 of 3
Job Number:LB5750
Account:ATCNCR Atlas
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V2K4357-MB1 2K0154015.D 1 08/28/24 JY n/a n/a V2K4357
The QC reported here applies to the following samples:Method: SM 6200B
LB5750-2, LB5750-3, LB5750-5, LB5750-6, LB5750-7
CAS No.Compound Result RL MDL Units Q
100-41-4 Ethylbenzene ND 0.50 0.20 ug/l
637-92-3 Ethyl Tert-Butyl Ether ND 0.50 0.056 ug/l
591-78-6 2-Hexanone ND 1.0 0.42 ug/l
87-68-3 Hexachlorobutadiene 0.20 0.20 0.11 ug/l
98-82-8 Isopropylbenzene ND 0.50 0.13 ug/l
99-87-6 p-Isopropyltoluene ND 0.50 0.13 ug/l
74-83-9 Methyl Bromide ND 0.50 0.23 ug/l
74-87-3 Methyl Chloride 0.45 0.50 0.066 ug/l J
74-95-3 Methylene Bromide ND 0.50 0.11 ug/l
75-09-2 Methylene Chloride ND 0.50 0.080 ug/l
78-93-3 Methyl Ethyl Ketone ND 25 0.28 ug/l
108-10-1 4-Methyl-2-pentanone ND 0.50 0.24 ug/l
1634-04-4 Methyl Tert Butyl Ether ND 0.50 0.068 ug/l
91-20-3 Naphthalene ND 0.50 0.10 ug/l
103-65-1 n-Propylbenzene ND 0.50 0.22 ug/l
100-42-5 Styrene ND 0.50 0.13 ug/l
75-85-4 Tert-Amyl Alcohol ND 25 0.77 ug/l
994-05-8 Tert-Amyl Methyl Ether ND 1.0 0.084 ug/l
75-65-0 Tert-Butyl Alcohol ND 10 1.0 ug/l
762-75-4 tert-Butyl Formate ND 5.0 0.035 ug/l
630-20-6 1,1,1,2-Tetrachloroethane ND 0.50 0.18 ug/l
79-34-5 1,1,2,2-Tetrachloroethane ND 0.20 0.12 ug/l
127-18-4 Tetrachloroethylene ND 0.50 0.22 ug/l
108-88-3 Toluene ND 0.50 0.29 ug/l
87-61-6 1,2,3-Trichlorobenzene ND 0.50 0.16 ug/l
120-82-1 1,2,4-Trichlorobenzene ND 0.50 0.17 ug/l
71-55-6 1,1,1-Trichloroethane ND 0.50 0.16 ug/l
79-00-5 1,1,2-Trichloroethane ND 0.30 0.17 ug/l
79-01-6 Trichloroethylene ND 0.50 0.18 ug/l
75-69-4 Trichlorofluoromethane ND 0.50 0.073 ug/l
96-18-4 1,2,3-Trichloropropane ND 0.50 0.023 ug/l
95-63-6 1,2,4-Trimethylbenzene ND 0.50 0.15 ug/l
108-67-8 1,3,5-Trimethylbenzene ND 0.50 0.16 ug/l
108-05-4 Vinyl Acetate ND 0.50 0.069 ug/l
75-01-4 Vinyl Chloride ND 0.10 0.075 ug/l
m,p-Xylene ND 1.0 0.34 ug/l
39 of 52
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Method Blank Summary Page 3 of 3
Job Number:LB5750
Account:ATCNCR Atlas
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V2K4357-MB1 2K0154015.D 1 08/28/24 JY n/a n/a V2K4357
The QC reported here applies to the following samples:Method: SM 6200B
LB5750-2, LB5750-3, LB5750-5, LB5750-6, LB5750-7
CAS No.Compound Result RL MDL Units Q
95-47-6 o-Xylene ND 0.50 0.15 ug/l
1330-20-7 Xylene (total)ND 0.50 0.16 ug/l
CAS No.Surrogate Recoveries Limits
17060-07-0 1,2-Dichloroethane-D4 96%70-130%
2037-26-5 Toluene-D8 101%70-130%
460-00-4 4-Bromofluorobenzene 100%70-130%
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Blank Spike/Blank Spike Duplicate Summary Page 1 of 3
Job Number:LB5750
Account:ATCNCR Atlas
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V2K4355-BS 2K0153978.D 1 08/26/24 JY n/a n/a V2K4355
V2K4355-BSD 2K0153979.D 1 08/26/24 JY n/a n/a V2K4355
The QC reported here applies to the following samples:Method: SM 6200B
LB5750-1, LB5750-2, LB5750-4, LB5750-5
Spike BSP BSP BSD BSD Limits
CAS No.Compound ug/l ug/l %ug/l %RPD Rec/RPD
67-64-1 Acetone 50 44.9 90 44.1 88 2 70-130/30
71-43-2 Benzene 20 19.9 100 18.7 94 6 70-130/30
108-86-1 Bromobenzene 20 20.5 103 19.3 97 6 70-130/30
74-97-5 Bromochloromethane 20 21.2 106 20.3 102 4 70-130/30
75-27-4 Bromodichloromethane 20 23.7 119 22.3 112 6 70-130/30
75-25-2 Bromoform 20 23.4 117 21.8 109 7 70-130/30
104-51-8 n-Butylbenzene 20 22.5 113 20.8 104 8 70-130/30
135-98-8 sec-Butylbenzene 20 22.1 111 20.6 103 7 70-130/30
98-06-6 tert-Butylbenzene 20 21.8 109 20.4 102 7 70-130/30
56-23-5 Carbon Tetrachloride 20 23.5 118 22.2 111 6 70-130/30
108-90-7 Chlorobenzene 20 20.5 103 18.9 95 8 70-130/30
75-00-3 Chloroethane 20 22.7 114 20.7 104 9 60-140/30
67-66-3 Chloroform 20 22.0 110 21.1 106 4 70-130/30
95-49-8 o-Chlorotoluene 20 21.1 106 19.7 99 7 70-130/30
106-43-4 p-Chlorotoluene 20 21.0 105 19.5 98 7 70-130/30
124-48-1 Dibromochloromethane 20 22.7 114 21.2 106 7 70-130/30
96-12-8 1,2-Dibromo-3-chloropropane 20 19.3 97 19.2 96 1 70-130/30
106-93-4 1,2-Dibromoethane 20 22.0 110 20.8 104 6 70-130/30
75-71-8 Dichlorodifluoromethane 20 23.3 117 21.8 109 7 60-140/30
541-73-1 m-Dichlorobenzene 20 20.4 102 19.1 96 7 70-130/30
95-50-1 o-Dichlorobenzene 20 20.3 102 19.2 96 6 70-130/30
106-46-7 p-Dichlorobenzene 20 20.3 102 19.4 97 5 70-130/30
75-34-3 1,1-Dichloroethane 20 22.2 111 20.9 105 6 70-130/30
107-06-2 1,2-Dichloroethane 20 21.0 105 20.0 100 5 70-130/30
75-35-4 1,1-Dichloroethylene 20 22.1 111 21.3 107 4 70-130/30
156-59-2 cis-1,2-Dichloroethylene 20 21.2 106 20.2 101 5 70-130/30
156-60-5 trans-1,2-Dichloroethylene 20 21.9 110 20.8 104 5 70-130/30
78-87-5 1,2-Dichloropropane 20 22.4 112 21.1 106 6 70-130/30
142-28-9 1,3-Dichloropropane 20 20.8 104 19.8 99 5 70-130/30
594-20-7 2,2-Dichloropropane 20 23.3 117 21.8 109 7 70-130/30
563-58-6 1,1-Dichloropropene 20 22.2 111 21.2 106 5 70-130/30
10061-01-5 cis-1,3-Dichloropropene 20 23.1 116 21.9 110 5 70-130/30
10061-02-6 trans-1,3-Dichloropropene 20 22.8 114 21.0 105 8 70-130/30
108-20-3 Di-Isopropyl Ether 20 21.8 109 20.7 104 5 70-130/30
624-95-3 3,3-Dimethyl-1-butanol 194 189 3 50-150/30 a
64-17-5 Ethyl Alcohol 400 363 91 356 89 2 70-130/30
* = Outside of Control Limits.
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Blank Spike/Blank Spike Duplicate Summary Page 2 of 3
Job Number:LB5750
Account:ATCNCR Atlas
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V2K4355-BS 2K0153978.D 1 08/26/24 JY n/a n/a V2K4355
V2K4355-BSD 2K0153979.D 1 08/26/24 JY n/a n/a V2K4355
The QC reported here applies to the following samples:Method: SM 6200B
LB5750-1, LB5750-2, LB5750-4, LB5750-5
Spike BSP BSP BSD BSD Limits
CAS No.Compound ug/l ug/l %ug/l %RPD Rec/RPD
100-41-4 Ethylbenzene 20 20.3 102 18.9 95 7 70-130/30
637-92-3 Ethyl Tert-Butyl Ether 20 21.7 109 20.9 105 4 70-130/30
591-78-6 2-Hexanone 50 46.3 93 43.9 88 5 70-130/30
87-68-3 Hexachlorobutadiene 20 21.2 106 20.3 102 4 70-130/30
98-82-8 Isopropylbenzene 20 22.0 110 20.4 102 8 70-130/30
99-87-6 p-Isopropyltoluene 20 22.5 113 20.9 105 7 70-130/30
74-83-9 Methyl Bromide 20 22.5 113 21.6 108 4 60-140/30
74-87-3 Methyl Chloride 20 18.5 93 17.5 88 6 60-140/30
74-95-3 Methylene Bromide 20 21.6 108 20.1 101 7 70-130/30
75-09-2 Methylene Chloride 20 20.3 102 19.6 98 4 70-130/30
78-93-3 Methyl Ethyl Ketone 50 46.4 93 46.0 92 1 70-130/30
108-10-1 4-Methyl-2-pentanone 50 53.0 106 51.9 104 2 70-130/30
1634-04-4 Methyl Tert Butyl Ether 20 23.1 116 22.2 111 4 70-130/30
91-20-3 Naphthalene 20 21.7 109 20.8 104 4 70-130/30
103-65-1 n-Propylbenzene 20 21.4 107 20.5 103 4 70-130/30
100-42-5 Styrene 20 22.4 112 21.0 105 6 70-130/30
75-85-4 Tert-Amyl Alcohol 200 229 115 227 114 1 50-150/30 a
994-05-8 Tert-Amyl Methyl Ether 20 22.0 110 21.1 106 4 70-130/30
75-65-0 Tert-Butyl Alcohol 100 109 109 108 108 1 70-130/30
762-75-4 tert-Butyl Formate 20 24.4 122 23.4 117 4 50-150/30 a
630-20-6 1,1,1,2-Tetrachloroethane 20 22.9 115 21.5 108 6 70-130/30
79-34-5 1,1,2,2-Tetrachloroethane 20 21.1 106 20.3 102 4 70-130/30
127-18-4 Tetrachloroethylene 20 20.7 104 19.2 96 8 70-130/30
108-88-3 Toluene 20 21.0 105 19.7 99 6 70-130/30
87-61-6 1,2,3-Trichlorobenzene 20 22.0 110 20.6 103 7 70-130/30
120-82-1 1,2,4-Trichlorobenzene 20 21.9 110 20.6 103 6 70-130/30
71-55-6 1,1,1-Trichloroethane 20 22.8 114 21.7 109 5 70-130/30
79-00-5 1,1,2-Trichloroethane 20 21.1 106 20.6 103 2 70-130/30
79-01-6 Trichloroethylene 20 22.5 113 21.2 106 6 70-130/30
75-69-4 Trichlorofluoromethane 20 24.3 122 23.1 116 5 60-140/30
96-18-4 1,2,3-Trichloropropane 20 20.3 102 19.7 99 3 70-130/30
95-63-6 1,2,4-Trimethylbenzene 20 20.5 103 19.4 97 6 70-130/30
108-67-8 1,3,5-Trimethylbenzene 20 21.2 106 19.9 100 6 70-130/30
108-05-4 Vinyl Acetate 20 21.7 109 20.6 103 5 70-130/30
75-01-4 Vinyl Chloride 20 21.9 110 20.9 105 5 60-140/30
m,p-Xylene 40 40.1 100 37.5 94 7 70-130/30
* = Outside of Control Limits.
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Blank Spike/Blank Spike Duplicate Summary Page 3 of 3
Job Number:LB5750
Account:ATCNCR Atlas
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V2K4355-BS 2K0153978.D 1 08/26/24 JY n/a n/a V2K4355
V2K4355-BSD 2K0153979.D 1 08/26/24 JY n/a n/a V2K4355
The QC reported here applies to the following samples:Method: SM 6200B
LB5750-1, LB5750-2, LB5750-4, LB5750-5
Spike BSP BSP BSD BSD Limits
CAS No.Compound ug/l ug/l %ug/l %RPD Rec/RPD
95-47-6 o-Xylene 20 20.5 103 19.2 96 7 70-130/30
1330-20-7 Xylene (total)60 60.6 101 56.7 95 7 70-130/30
CAS No.Surrogate Recoveries BSP BSD Limits
17060-07-0 1,2-Dichloroethane-D4 93%96%70-130%
2037-26-5 Toluene-D8 102%101%70-130%
460-00-4 4-Bromofluorobenzene 100%101%70-130%
(a) Advisory control limits.
* = Outside of Control Limits.
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Blank Spike/Blank Spike Duplicate Summary Page 1 of 3
Job Number:LB5750
Account:ATCNCR Atlas
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V2K4357-BS 2K0154012.D 1 08/28/24 JY n/a n/a V2K4357
V2K4357-BSD 2K0154013.D 1 08/28/24 JY n/a n/a V2K4357
The QC reported here applies to the following samples:Method: SM 6200B
LB5750-2, LB5750-3, LB5750-5, LB5750-6, LB5750-7
Spike BSP BSP BSD BSD Limits
CAS No.Compound ug/l ug/l %ug/l %RPD Rec/RPD
67-64-1 Acetone 50 42.5 85 45.0 90 6 70-130/30
71-43-2 Benzene 20 19.3 97 19.1 96 1 70-130/30
108-86-1 Bromobenzene 20 19.0 95 19.2 96 1 70-130/30
74-97-5 Bromochloromethane 20 19.6 98 20.1 101 3 70-130/30
75-27-4 Bromodichloromethane 20 23.1 116 23.0 115 0 70-130/30
75-25-2 Bromoform 20 21.9 110 22.3 112 2 70-130/30
104-51-8 n-Butylbenzene 20 19.4 97 19.2 96 1 70-130/30
135-98-8 sec-Butylbenzene 20 19.5 98 19.0 95 3 70-130/30
98-06-6 tert-Butylbenzene 20 19.4 97 19.0 95 2 70-130/30
56-23-5 Carbon Tetrachloride 20 22.0 110 21.9 110 0 70-130/30
108-90-7 Chlorobenzene 20 18.8 94 19.0 95 1 70-130/30
75-00-3 Chloroethane 20 26.3 132 25.8 129 2 60-140/30
67-66-3 Chloroform 20 20.3 102 20.3 102 0 70-130/30
95-49-8 o-Chlorotoluene 20 18.8 94 18.2 91 3 70-130/30
106-43-4 p-Chlorotoluene 20 18.7 94 18.2 91 3 70-130/30
124-48-1 Dibromochloromethane 20 20.9 105 21.1 106 1 70-130/30
96-12-8 1,2-Dibromo-3-chloropropane 20 17.7 89 17.2 86 3 70-130/30
106-93-4 1,2-Dibromoethane 20 20.8 104 20.9 105 0 70-130/30
75-71-8 Dichlorodifluoromethane 20 24.6 123 24.6 123 0 60-140/30
541-73-1 m-Dichlorobenzene 20 18.3 92 18.0 90 2 70-130/30
95-50-1 o-Dichlorobenzene 20 18.3 92 18.2 91 1 70-130/30
106-46-7 p-Dichlorobenzene 20 18.5 93 18.4 92 1 70-130/30
75-34-3 1,1-Dichloroethane 20 20.7 104 20.7 104 0 70-130/30
107-06-2 1,2-Dichloroethane 20 20.6 103 20.7 104 0 70-130/30
75-35-4 1,1-Dichloroethylene 20 20.5 103 20.5 103 0 70-130/30
156-59-2 cis-1,2-Dichloroethylene 20 20.4 102 20.1 101 1 70-130/30
156-60-5 trans-1,2-Dichloroethylene 20 20.5 103 20.6 103 0 70-130/30
78-87-5 1,2-Dichloropropane 20 21.8 109 21.6 108 1 70-130/30
142-28-9 1,3-Dichloropropane 20 19.6 98 19.9 100 2 70-130/30
594-20-7 2,2-Dichloropropane 20 20.9 105 20.7 104 1 70-130/30
563-58-6 1,1-Dichloropropene 20 21.0 105 20.7 104 1 70-130/30
10061-01-5 cis-1,3-Dichloropropene 20 22.2 111 22.3 112 0 70-130/30
10061-02-6 trans-1,3-Dichloropropene 20 21.0 105 21.2 106 1 70-130/30
108-20-3 Di-Isopropyl Ether 20 20.8 104 20.9 105 0 70-130/30
624-95-3 3,3-Dimethyl-1-butanol 173 190 9 50-150/30 a
64-17-5 Ethyl Alcohol 400 339 85 370 93 9 70-130/30
* = Outside of Control Limits.
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Blank Spike/Blank Spike Duplicate Summary Page 2 of 3
Job Number:LB5750
Account:ATCNCR Atlas
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V2K4357-BS 2K0154012.D 1 08/28/24 JY n/a n/a V2K4357
V2K4357-BSD 2K0154013.D 1 08/28/24 JY n/a n/a V2K4357
The QC reported here applies to the following samples:Method: SM 6200B
LB5750-2, LB5750-3, LB5750-5, LB5750-6, LB5750-7
Spike BSP BSP BSD BSD Limits
CAS No.Compound ug/l ug/l %ug/l %RPD Rec/RPD
100-41-4 Ethylbenzene 20 18.7 94 18.8 94 1 70-130/30
637-92-3 Ethyl Tert-Butyl Ether 20 20.7 104 21.1 106 2 70-130/30
591-78-6 2-Hexanone 50 43.7 87 45.4 91 4 70-130/30
87-68-3 Hexachlorobutadiene 20 19.3 97 19.3 97 0 70-130/30
98-82-8 Isopropylbenzene 20 20.2 101 20.3 102 0 70-130/30
99-87-6 p-Isopropyltoluene 20 19.9 100 19.5 98 2 70-130/30
74-83-9 Methyl Bromide 20 17.8 89 19.3 97 8 60-140/30
74-87-3 Methyl Chloride 20 16.5 83 16.9 85 2 60-140/30
74-95-3 Methylene Bromide 20 21.0 105 21.1 106 0 70-130/30
75-09-2 Methylene Chloride 20 19.4 97 19.7 99 2 70-130/30
78-93-3 Methyl Ethyl Ketone 50 45.0 90 48.0 96 6 70-130/30
108-10-1 4-Methyl-2-pentanone 50 52.0 104 53.9 108 4 70-130/30
1634-04-4 Methyl Tert Butyl Ether 20 21.9 110 22.3 112 2 70-130/30
91-20-3 Naphthalene 20 19.3 97 19.3 97 0 70-130/30
103-65-1 n-Propylbenzene 20 19.0 95 18.5 93 3 70-130/30
100-42-5 Styrene 20 20.9 105 21.1 106 1 70-130/30
75-85-4 Tert-Amyl Alcohol 200 217 109 229 115 5 50-150/30 a
994-05-8 Tert-Amyl Methyl Ether 20 21.6 108 21.7 109 0 70-130/30
75-65-0 Tert-Butyl Alcohol 100 104 104 110 110 6 70-130/30
762-75-4 tert-Butyl Formate 20 21.8 109 22.2 111 2 50-150/30 a
630-20-6 1,1,1,2-Tetrachloroethane 20 21.3 107 21.3 107 0 70-130/30
79-34-5 1,1,2,2-Tetrachloroethane 20 19.1 96 18.8 94 2 70-130/30
127-18-4 Tetrachloroethylene 20 18.7 94 18.6 93 1 70-130/30
108-88-3 Toluene 20 19.5 98 19.6 98 1 70-130/30
87-61-6 1,2,3-Trichlorobenzene 20 20.0 100 19.6 98 2 70-130/30
120-82-1 1,2,4-Trichlorobenzene 20 19.7 99 19.7 99 0 70-130/30
71-55-6 1,1,1-Trichloroethane 20 21.6 108 21.7 109 0 70-130/30
79-00-5 1,1,2-Trichloroethane 20 19.9 100 20.6 103 3 70-130/30
79-01-6 Trichloroethylene 20 21.6 108 21.5 108 0 70-130/30
75-69-4 Trichlorofluoromethane 20 23.1 116 22.9 115 1 60-140/30
96-18-4 1,2,3-Trichloropropane 20 19.2 96 19.9 100 4 70-130/30
95-63-6 1,2,4-Trimethylbenzene 20 18.5 93 18.0 90 3 70-130/30
108-67-8 1,3,5-Trimethylbenzene 20 19.1 96 18.6 93 3 70-130/30
108-05-4 Vinyl Acetate 20 20.4 102 20.6 103 1 70-130/30
75-01-4 Vinyl Chloride 20 18.9 95 19.1 96 1 60-140/30
m,p-Xylene 40 37.2 93 37.1 93 0 70-130/30
* = Outside of Control Limits.
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Blank Spike/Blank Spike Duplicate Summary Page 3 of 3
Job Number:LB5750
Account:ATCNCR Atlas
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V2K4357-BS 2K0154012.D 1 08/28/24 JY n/a n/a V2K4357
V2K4357-BSD 2K0154013.D 1 08/28/24 JY n/a n/a V2K4357
The QC reported here applies to the following samples:Method: SM 6200B
LB5750-2, LB5750-3, LB5750-5, LB5750-6, LB5750-7
Spike BSP BSP BSD BSD Limits
CAS No.Compound ug/l ug/l %ug/l %RPD Rec/RPD
95-47-6 o-Xylene 20 19.1 96 19.2 96 1 70-130/30
1330-20-7 Xylene (total)60 56.3 94 56.2 94 0 70-130/30
CAS No.Surrogate Recoveries BSP BSD Limits
17060-07-0 1,2-Dichloroethane-D4 89%89%70-130%
2037-26-5 Toluene-D8 102%104%70-130%
460-00-4 4-Bromofluorobenzene 105%104%70-130%
(a) Advisory control limits.
* = Outside of Control Limits.
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Matrix Spike/Matrix Spike Duplicate Summary Page 1 of 3
Job Number:LB5750
Account:ATCNCR Atlas
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
LB5750-6MS 2K0153996.D 20 08/26/24 JY n/a n/a V2K4355
LB5750-6MSD 2K0153997.D 20 08/26/24 JY n/a n/a V2K4355
LB5750-6 a 2K0153993.D 20 08/26/24 JY n/a n/a V2K4355
The QC reported here applies to the following samples:Method: SM 6200B
LB5750-1, LB5750-2, LB5750-4, LB5750-5
LB5750-6 Spike MS MS Spike MSD MSD Limits
CAS No.Compound ug/l Q ug/l ug/l %ug/l ug/l %RPD Rec/RPD
67-64-1 Acetone ND 1000 442 44* b 1000 444 44* b 0 70-130/20
71-43-2 Benzene 10.6 400 380 92 400 370 90 3 70-130/20
108-86-1 Bromobenzene ND 400 371 93 400 362 91 2 70-130/20
74-97-5 Bromochloromethane ND 400 401 100 400 395 99 2 70-130/20
75-27-4 Bromodichloromethane ND 400 430 108 400 418 105 3 70-130/20
75-25-2 Bromoform ND 400 382 96 400 388 97 2 70-130/20
104-51-8 n-Butylbenzene ND 400 387 97 400 387 97 0 70-130/20
135-98-8 sec-Butylbenzene ND 400 377 94 400 377 94 0 70-130/20
98-06-6 tert-Butylbenzene ND 400 376 94 400 377 94 0 70-130/20
56-23-5 Carbon Tetrachloride ND 400 421 105 400 420 105 0 70-130/20
108-90-7 Chlorobenzene ND 400 365 91 400 355 89 3 70-130/20
75-00-3 Chloroethane ND 400 381 95 400 385 96 1 60-140/20
67-66-3 Chloroform ND 400 379 95 400 384 96 1 70-130/20
95-49-8 o-Chlorotoluene ND 400 367 92 400 370 93 1 70-130/20
106-43-4 p-Chlorotoluene ND 400 367 92 400 369 92 1 70-130/20
124-48-1 Dibromochloromethane ND 400 387 97 400 386 97 0 70-130/20
96-12-8 1,2-Dibromo-3-chloropropane ND 400 330 83 400 341 85 3 70-130/20
106-93-4 1,2-Dibromoethane ND 400 397 99 400 392 98 1 70-130/20
75-71-8 Dichlorodifluoromethane ND 400 425 106 400 418 105 2 60-140/20
541-73-1 m-Dichlorobenzene ND 400 352 88 400 352 88 0 70-130/20
95-50-1 o-Dichlorobenzene ND 400 356 89 400 355 89 0 70-130/20
106-46-7 p-Dichlorobenzene ND 400 359 90 400 355 89 1 70-130/20
75-34-3 1,1-Dichloroethane ND 400 419 105 400 405 101 3 70-130/20
107-06-2 1,2-Dichloroethane ND 400 395 99 400 386 97 2 70-130/20
75-35-4 1,1-Dichloroethylene ND 400 419 105 400 405 101 3 70-130/20
156-59-2 cis-1,2-Dichloroethylene ND 400 415 104 400 397 99 4 70-130/20
156-60-5 trans-1,2-Dichloroethylene ND 400 415 104 400 405 101 2 70-130/20
78-87-5 1,2-Dichloropropane ND 400 414 104 400 410 103 1 70-130/20
142-28-9 1,3-Dichloropropane ND 400 378 95 400 371 93 2 70-130/20
594-20-7 2,2-Dichloropropane ND 400 371 93 400 358 90 4 70-130/20
563-58-6 1,1-Dichloropropene ND 400 413 103 400 410 103 1 70-130/20
10061-01-5 cis-1,3-Dichloropropene ND 400 407 102 400 401 100 1 70-130/20
10061-02-6 trans-1,3-Dichloropropene ND 400 385 96 400 383 96 1 70-130/20
108-20-3 Di-Isopropyl Ether ND 400 413 103 400 403 101 2 70-130/20
624-95-3 3,3-Dimethyl-1-butanol ND 3250 3260 0 50-150/30 c
64-17-5 Ethyl Alcohol ND 8000 6750 84 8000 6610 83 2 70-130/20
* = Outside of Control Limits.
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Matrix Spike/Matrix Spike Duplicate Summary Page 2 of 3
Job Number:LB5750
Account:ATCNCR Atlas
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
LB5750-6MS 2K0153996.D 20 08/26/24 JY n/a n/a V2K4355
LB5750-6MSD 2K0153997.D 20 08/26/24 JY n/a n/a V2K4355
LB5750-6 a 2K0153993.D 20 08/26/24 JY n/a n/a V2K4355
The QC reported here applies to the following samples:Method: SM 6200B
LB5750-1, LB5750-2, LB5750-4, LB5750-5
LB5750-6 Spike MS MS Spike MSD MSD Limits
CAS No.Compound ug/l Q ug/l ug/l %ug/l ug/l %RPD Rec/RPD
100-41-4 Ethylbenzene 58.0 400 425 92 400 419 90 1 70-130/20
637-92-3 Ethyl Tert-Butyl Ether ND 400 412 103 400 407 102 1 70-130/20
591-78-6 2-Hexanone ND 1000 682 68* b 1000 678 68* b 1 70-130/20
87-68-3 Hexachlorobutadiene ND 400 336 84 400 347 87 3 70-130/20
98-82-8 Isopropylbenzene 5.9 J 400 401 99 400 388 96 3 70-130/20
99-87-6 p-Isopropyltoluene ND 400 386 97 400 382 96 1 70-130/20
74-83-9 Methyl Bromide ND 400 300 75 400 343 86 13 60-140/20
74-87-3 Methyl Chloride ND 400 350 88 400 330 83 6 60-140/20
74-95-3 Methylene Bromide ND 400 397 99 400 395 99 1 70-130/20
75-09-2 Methylene Chloride 7.5 J 400 395 97 400 385 94 3 70-130/20
78-93-3 Methyl Ethyl Ketone ND 1000 723 72 1000 698 70 4 70-130/20
108-10-1 4-Methyl-2-pentanone ND 1000 973 97 1000 969 97 0 70-130/20
1634-04-4 Methyl Tert Butyl Ether ND 400 438 110 400 433 108 1 70-130/20
91-20-3 Naphthalene 26.7 400 401 94 400 401 94 0 70-130/20
103-65-1 n-Propylbenzene 17.8 400 389 93 400 384 92 1 70-130/20
100-42-5 Styrene ND 400 399 100 400 388 97 3 70-130/20
75-85-4 Tert-Amyl Alcohol ND 4000 4070 102 4000 4080 102 0 50-150/30 c
994-05-8 Tert-Amyl Methyl Ether ND 400 406 102 400 406 102 0 70-130/20
75-65-0 Tert-Butyl Alcohol ND 2000 2020 101 2000 2060 103 2 70-130/20
762-75-4 tert-Butyl Formate ND 400 410 103 400 420 105 2 50-150/30 c
630-20-6 1,1,1,2-Tetrachloroethane ND 400 411 103 400 403 101 2 70-130/20
79-34-5 1,1,2,2-Tetrachloroethane ND 400 368 92 400 381 95 3 70-130/20
127-18-4 Tetrachloroethylene ND 400 363 91 400 354 89 3 70-130/20
108-88-3 Toluene 44.9 400 407 91 400 396 88 3 70-130/20
87-61-6 1,2,3-Trichlorobenzene ND 400 370 93 400 373 93 1 70-130/20
120-82-1 1,2,4-Trichlorobenzene ND 400 371 93 400 372 93 0 70-130/20
71-55-6 1,1,1-Trichloroethane ND 400 434 109 400 423 106 3 70-130/20
79-00-5 1,1,2-Trichloroethane ND 400 391 98 400 381 95 3 70-130/20
79-01-6 Trichloroethylene ND 400 413 103 400 397 99 4 70-130/20
75-69-4 Trichlorofluoromethane ND 400 446 112 400 438 110 2 60-140/20
96-18-4 1,2,3-Trichloropropane ND 400 374 94 400 358 90 4 70-130/20
95-63-6 1,2,4-Trimethylbenzene 83.2 400 440 89 400 439 89 0 70-130/20
108-67-8 1,3,5-Trimethylbenzene 18.8 400 390 93 400 388 92 1 70-130/20
108-05-4 Vinyl Acetate ND 400 442 111 400 444 111 0 70-130/20
75-01-4 Vinyl Chloride ND 400 410 103 400 392 98 4 60-140/20
m,p-Xylene 81.4 800 806 91 800 780 87 3 70-130/20
* = Outside of Control Limits.
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Matrix Spike/Matrix Spike Duplicate Summary Page 3 of 3
Job Number:LB5750
Account:ATCNCR Atlas
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
LB5750-6MS 2K0153996.D 20 08/26/24 JY n/a n/a V2K4355
LB5750-6MSD 2K0153997.D 20 08/26/24 JY n/a n/a V2K4355
LB5750-6 a 2K0153993.D 20 08/26/24 JY n/a n/a V2K4355
The QC reported here applies to the following samples:Method: SM 6200B
LB5750-1, LB5750-2, LB5750-4, LB5750-5
LB5750-6 Spike MS MS Spike MSD MSD Limits
CAS No.Compound ug/l Q ug/l ug/l %ug/l ug/l %RPD Rec/RPD
95-47-6 o-Xylene 44.4 400 421 94 400 408 91 3 70-130/20
1330-20-7 Xylene (total)126 1200 1230 92 1200 1190 89 3 70-130/20
CAS No.Surrogate Recoveries MS MSD LB5750-6 Limits
17060-07-0 1,2-Dichloroethane-D4 95%96%96%70-130%
2037-26-5 Toluene-D8 102%103%100%70-130%
460-00-4 4-Bromofluorobenzene 102%102%102%70-130%
(a) Sample used for QC purposes only.
(b) Outside control limits biased low. Blank spike passed criteria.
(c) Advisory control limits.
* = Outside of Control Limits.
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Matrix Spike/Matrix Spike Duplicate Summary Page 1 of 3
Job Number:LB5750
Account:ATCNCR Atlas
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
LB5750-3MS 2K0154023.D 20 08/28/24 JY n/a n/a V2K4357
LB5750-3MSD 2K0154024.D 20 08/28/24 JY n/a n/a V2K4357
LB5750-3 2K0154020.D 50 08/28/24 JY n/a n/a V2K4357
The QC reported here applies to the following samples:Method: SM 6200B
LB5750-2, LB5750-3, LB5750-5, LB5750-6, LB5750-7
LB5750-3 Spike MS MS Spike MSD MSD Limits
CAS No.Compound ug/l Q ug/l ug/l %ug/l ug/l %RPD Rec/RPD
67-64-1 Acetone 312 J 1000 417 11* a 1000 387 8* a 7 70-130/20
71-43-2 Benzene 1510 400 2220 178* b 400 2130 155* b 4 70-130/20
108-86-1 Bromobenzene ND 400 371 93 400 364 91 2 70-130/20
74-97-5 Bromochloromethane ND 400 413 103 400 387 97 7 70-130/20
75-27-4 Bromodichloromethane ND 400 446 112 400 427 107 4 70-130/20
75-25-2 Bromoform ND 400 366 92 400 355 89 3 70-130/20
104-51-8 n-Butylbenzene ND 400 717 179* a 400 711 178* a 1 70-130/20
135-98-8 sec-Butylbenzene ND 400 384 96 400 376 94 2 70-130/20
98-06-6 tert-Butylbenzene ND 400 374 94 400 361 90 4 70-130/20
56-23-5 Carbon Tetrachloride ND 400 449 112 400 429 107 5 70-130/20
108-90-7 Chlorobenzene ND 400 363 91 400 357 89 2 70-130/20
75-00-3 Chloroethane ND 400 409 102 400 402 101 2 60-140/20
67-66-3 Chloroform ND 400 412 103 400 380 95 8 70-130/20
95-49-8 o-Chlorotoluene ND 400 367 92 400 353 88 4 70-130/20
106-43-4 p-Chlorotoluene ND 400 368 92 400 353 88 4 70-130/20
124-48-1 Dibromochloromethane ND 400 385 96 400 379 95 2 70-130/20
96-12-8 1,2-Dibromo-3-chloropropane ND 400 326 82 400 314 79 4 70-130/20
106-93-4 1,2-Dibromoethane ND 400 399 100 400 392 98 2 70-130/20
75-71-8 Dichlorodifluoromethane ND 400 481 120 400 470 118 2 60-140/20
541-73-1 m-Dichlorobenzene ND 400 357 89 400 345 86 3 70-130/20
95-50-1 o-Dichlorobenzene ND 400 361 90 400 344 86 5 70-130/20
106-46-7 p-Dichlorobenzene ND 400 362 91 400 350 88 3 70-130/20
75-34-3 1,1-Dichloroethane ND 400 443 111 400 411 103 7 70-130/20
107-06-2 1,2-Dichloroethane ND 400 411 103 400 394 99 4 70-130/20
75-35-4 1,1-Dichloroethylene ND 400 437 109 400 419 105 4 70-130/20
156-59-2 cis-1,2-Dichloroethylene ND 400 442 111 400 418 105 6 70-130/20
156-60-5 trans-1,2-Dichloroethylene ND 400 443 111 400 416 104 6 70-130/20
78-87-5 1,2-Dichloropropane ND 400 443 111 400 424 106 4 70-130/20
142-28-9 1,3-Dichloropropane ND 400 374 94 400 366 92 2 70-130/20
594-20-7 2,2-Dichloropropane ND 400 429 107 400 403 101 6 70-130/20
563-58-6 1,1-Dichloropropene ND 400 446 112 400 422 106 6 70-130/20
10061-01-5 cis-1,3-Dichloropropene ND 400 435 109 400 423 106 3 70-130/20
10061-02-6 trans-1,3-Dichloropropene ND 400 391 98 400 382 96 2 70-130/20
108-20-3 Di-Isopropyl Ether ND 400 435 109 400 409 102 6 70-130/20
624-95-3 3,3-Dimethyl-1-butanol ND 3360 3200 5 50-150/30 c
64-17-5 Ethyl Alcohol ND 8000 7170 90 8000 6750 84 6 70-130/20
* = Outside of Control Limits.
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Matrix Spike/Matrix Spike Duplicate Summary Page 2 of 3
Job Number:LB5750
Account:ATCNCR Atlas
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
LB5750-3MS 2K0154023.D 20 08/28/24 JY n/a n/a V2K4357
LB5750-3MSD 2K0154024.D 20 08/28/24 JY n/a n/a V2K4357
LB5750-3 2K0154020.D 50 08/28/24 JY n/a n/a V2K4357
The QC reported here applies to the following samples:Method: SM 6200B
LB5750-2, LB5750-3, LB5750-5, LB5750-6, LB5750-7
LB5750-3 Spike MS MS Spike MSD MSD Limits
CAS No.Compound ug/l Q ug/l ug/l %ug/l ug/l %RPD Rec/RPD
100-41-4 Ethylbenzene 2480 400 3140 165* b 400 3050 143* b 3 70-130/20
637-92-3 Ethyl Tert-Butyl Ether ND 400 438 110 400 414 104 6 70-130/20
591-78-6 2-Hexanone ND 1000 663 66* a 1000 654 65* a 1 70-130/20
87-68-3 Hexachlorobutadiene ND 400 348 87 400 356 89 2 70-130/20
98-82-8 Isopropylbenzene 76.0 400 478 101 400 476 100 0 70-130/20
99-87-6 p-Isopropyltoluene ND 400 421 105 400 416 104 1 70-130/20
74-83-9 Methyl Bromide ND 400 289 72 400 345 86 18 60-140/20
74-87-3 Methyl Chloride ND 400 502 126 400 479 120 5 60-140/20
74-95-3 Methylene Bromide ND 400 420 105 400 390 98 7 70-130/20
75-09-2 Methylene Chloride 134 400 419 71 400 390 64* a 7 70-130/20
78-93-3 Methyl Ethyl Ketone ND 1000 736 74 1000 759 76 3 70-130/20
108-10-1 4-Methyl-2-pentanone ND 1000 978 98 1000 978 98 0 70-130/20
1634-04-4 Methyl Tert Butyl Ether 20.2 J 400 479 115 400 452 108 6 70-130/20
91-20-3 Naphthalene 765 400 1290 131* a 400 1270 126 2 70-130/20
103-65-1 n-Propylbenzene 231 400 646 104 400 628 99 3 70-130/20
100-42-5 Styrene 59.2 400 463 101 400 455 99 2 70-130/20
75-85-4 Tert-Amyl Alcohol 3740 4000 8890 129 4000 8840 128 1 50-150/30 c
994-05-8 Tert-Amyl Methyl Ether ND 400 429 107 400 418 105 3 70-130/20
75-65-0 Tert-Butyl Alcohol ND 2000 2220 111 2000 2170 109 2 70-130/20
762-75-4 tert-Butyl Formate ND 400 376 94 400 363 91 4 50-150/30 c
630-20-6 1,1,1,2-Tetrachloroethane ND 400 398 100 400 388 97 3 70-130/20
79-34-5 1,1,2,2-Tetrachloroethane ND 400 366 92 400 354 89 3 70-130/20
127-18-4 Tetrachloroethylene ND 400 371 93 400 360 90 3 70-130/20
108-88-3 Toluene 3800 400 4940 285* b 400 4770 243* b 4 70-130/20
87-61-6 1,2,3-Trichlorobenzene ND 400 380 95 400 373 93 2 70-130/20
120-82-1 1,2,4-Trichlorobenzene ND 400 385 96 400 378 95 2 70-130/20
71-55-6 1,1,1-Trichloroethane ND 400 457 114 400 435 109 5 70-130/20
79-00-5 1,1,2-Trichloroethane ND 400 395 99 400 386 97 2 70-130/20
79-01-6 Trichloroethylene ND 400 431 108 400 422 106 2 70-130/20
75-69-4 Trichlorofluoromethane ND 400 426 107 400 417 104 2 60-140/20
96-18-4 1,2,3-Trichloropropane ND 400 385 96 400 374 94 3 70-130/20
95-63-6 1,2,4-Trimethylbenzene 1850 400 2560 178* b 400 2480 158* b 3 70-130/20
108-67-8 1,3,5-Trimethylbenzene 463 400 938 119 400 898 109 4 70-130/20
108-05-4 Vinyl Acetate ND 400 438 110 400 414 104 6 70-130/20
75-01-4 Vinyl Chloride ND 400 418 105 400 439 110 5 60-140/20
m,p-Xylene 7140 800 5580 -195* b 800 5420 -215* b 3 70-130/20
* = Outside of Control Limits.
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Matrix Spike/Matrix Spike Duplicate Summary Page 3 of 3
Job Number:LB5750
Account:ATCNCR Atlas
Project:RM 6177, 4302 W Gate City Blvd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
LB5750-3MS 2K0154023.D 20 08/28/24 JY n/a n/a V2K4357
LB5750-3MSD 2K0154024.D 20 08/28/24 JY n/a n/a V2K4357
LB5750-3 2K0154020.D 50 08/28/24 JY n/a n/a V2K4357
The QC reported here applies to the following samples:Method: SM 6200B
LB5750-2, LB5750-3, LB5750-5, LB5750-6, LB5750-7
LB5750-3 Spike MS MS Spike MSD MSD Limits
CAS No.Compound ug/l Q ug/l ug/l %ug/l ug/l %RPD Rec/RPD
95-47-6 o-Xylene 3290 400 3970 170* b 400 3900 153* b 2 70-130/20
1330-20-7 Xylene (total)10400 1200 9550 -71* b 1200 9320 -90* b 2 70-130/20
CAS No.Surrogate Recoveries MS MSD LB5750-3 Limits
17060-07-0 1,2-Dichloroethane-D4 93%92%91%70-130%
2037-26-5 Toluene-D8 103%101%102%70-130%
460-00-4 4-Bromofluorobenzene 103%102%100%70-130%
(a) Outside control limits due to matrix interference. Blank Spike meets acceptance criteria.
(b) Outside control limits due to high level in sample relative to spike amount.
(c) Advisory control limits.
* = Outside of Control Limits.
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