WS-4593_14899_CA_MRP_20230413

2725 East Millbrook Rd
Raleigh, NC 27604
Telephone [phone]
N.C. Engineering License No. C-1598
www.atcgroupservices.com

April 13, 2023

Ms. Christina Schroeter
North Carolina Department of Environmental Quality
Winston-Salem Regional Office
Division of Waste Management-UST Section
450 West Hanes Mill Road
Winston-Salem, North Carolina 27105

Subject: Groundwater Monitoring Report
Former Conoco Store #33075 (RM #6143)
3488 Robinhood Road
Winston Salem, Forsyth County, North Carolina
Incident No. 14899
ATC Project No.: P666143707

Dear Ms. Schroeter:

ATC Associates of North Carolina, P.C., on behalf of Phillips 66 Company, is submitting this Groundwater
Monitoring Report for the Former Conoco Store #33075 located in Winston Salem, North Carolina. The
report summarizes laboratory analytical results for the groundwater-sampling event conducted in January
2023.

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

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

Corinne Lally Gabriel Araos, P.E.
Staff Scientist Branch Manger
Direct Line: 919-948-3554 Direct Line: 919-573-1205
Email: [e-mail] Email: [e-mail]

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

Prepared for:

PHILLIPS 66 COMPANY

GROUNDWATER MONITORING REPORT
3488 ROBINHOOD ROAD
WINSTON SALEM, NORTH CAROLINA

NCDEQ INCIDENT NO. 14899

ATC Project No. P666143707

Prepared by:

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

Corinne Lally
Staff Scientist
Direct Line: 919-948-3554
Email: [e-mail]

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

April 13, 2023

Former Conoco Store #33075 (RM #6143)
April 13, 2023
Page i

ATC Project No. P666143707 Phillips 66 Company
Table of Contents
1.0 SITE IDENTIFICATION .......................................................................................................................... 1
2.0 INTRODUCTION ..................................................................................................................................... 2
3.0 BACKGROUND ...................................................................................................................................... 2
4.0 SITE DESCRIPTION .............................................................................................................................. 3
5.0 GROUNDWATER CHARACTERIZATION ........................................................................................... 3
5.1 GROUNDWATER LEVELS...................................................................................................................................... 3
5.2 GROUNDWATER QUALITY ................................................................................................................................... 4
6.0 CONCLUSIONS AND RECOMMENDATIONS .................................................................................... 4

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

FIGURES:
Figure 1 – Site Topographic Map
Figure 2 – Site Map
Figure 3 – Site Vicinity Map
Figure 4 – Groundwater Elevation Contour Map
Figure 5 – Other Contaminants of Concern in Groundwater

APPENDICES:
Appendix A – Laboratory Analytical Report

Former Conoco Store #33075 (RM #6143)
April 13, 2023
Page 2 of 4

ATC Proposal (or Project #) No. P666143707 Phillips 66 Company
2.0 INTRODUCTION

ATC Associates of North Carolina, P.C. (ATC) was retained by Phillips 66 Company to conduct site
monitoring activities at the Former Conoco Store #33075 (Incident No. 14899). The site is located at 3488
Robinhood Road in Winston Salem, Forsyth County, North Carolina. The site was formerly a gasoline
station with convenience store but currently operates as a Walgreens pharmacy store. A site topographic
map is presented as Figure 1 and a site map is presented as Figure 2. This report documents groundwater
sampling activities conducted in January 2023.

3.0 BACKGROUND

The site operated as Conoco Store #33075 from May 1969 until February 1989. The underground storage
tank system (UST) consisted of three 10,000-gallon gasoline USTs that were removed in 1989. The site
then operated as Crown Fast Fare #753 with three new 10,000-gallon gasoline USTs and one 4,000-gallon
kerosene UST.

Between July 1995 and January 1996, Brown & Root Environmental conducted a Preliminary Site
Assessment at the site. Direct-push soil samples were collected from seven boring locations around the
UST system and dispenser islands. The soil analytical results indicated exceedances of the Soil-to-Water
Maximum Soil Contaminant Concentrations (MSCCs) in two soil samples. Based on the soil exceedances,
a release was reported to the North Carolina Department of Environmental Quality (NCDEQ) in July 1995.
In December 1995, five groundwater monitoring wells (MW-1, MW-2, MW-3, MW-4 and MWD-5) were
installed at the site.

Between July 1999 and September 2000, Dahl & Associates, Inc. (DAHL) conducted a Phase II Limited
Site Assessment at the site. Two direct-push soil samples were collected and select monitoring wells were
sampled. The Phase II report documented exceedances of the gross contaminant levels (GCLs) for
benzene and 1,2-dibromoethane (EDB) in MW-1.

Between September 2000 and May 2002, EPOCH Environmental Group, LLC conducted Comprehensive
Site Assessment (CSA) activities at the site. Monitoring wells MW-3, MW-4 and MWD-5 were abandoned
due to historical analytical concentrations below the laboratory detection limits and dry water table
conditions. Two new shallow monitoring wells (MW-6 and MW-7) were installed off-site to delineate the
extent of the groundwater plume. The CSA concluded that no water supply wells were located within 1,500
feet of the site and that the site should be ranked intermediate due to the benzene and EDB exceedances
of the GCLs in MW-1. The CSA also documented that the historical soil analytical results were below the
Industrial/Commercial MSCCs but that ethylbenzene, naphthalene and 1,2,4-trimethylbenezene exceeded
the Residential MSCCs.

In March 2003, the property was sold by Winnella Duncan to Robinhood Development Co., LLC. The former
UST system consisting of three 10,000-gallon gasoline USTs and one 4,000-gallon kerosene UST were
removed and building was demolished. An Underground Storage Tank Assessment Report prepared by
Excel Civil & Environmental Associates was submitted to NCDEQ on April 4, 2003. The report documented
that the soils were not impacted by the closed UST system. Subsequently, the property was renovated into
a Walgreens pharmacy. During site renovations, monitoring wells MW-1, MW-2, MW-6, MW-8, and MW-
9D were destroyed. Monitoring well MW-7 was found intact during a subsequent site inspection by ATC.

In September 2003, ATC was retained by ConocoPhillips to continue environmental assessment and
remediation services at the referenced site. ATC installed four new shallow monitoring wells (MW-1 through
MW-4) at the site and performed a groundwater-sampling event in August 2006. ACT submitted a
Groundwater Sampling Report on October 3, 2006.

On May 1, 2012, ConocoPhillips separated into two companies, ConocoPhillips and Phillips 66 Company.
The environmental remediation activities associated with this site are managed by Phillips 66 Company.

Former Conoco Store #33075 (RM #6143)
April 13, 2023
Page 3 of 4

ATC Proposal (or Project #) No. P666143707 Phillips 66 Company
ATC submitted a Groundwater Monitoring Report on July 11, 2012, documenting groundwater sampling
activities and an updated receptor survey. Based on the updated receptor survey there are no surface
water bodies within 500 feet of the site and there are no water supply wells within 1,000 feet of the site.
The site was classified as an intermediate risk site due to the presence of benzene above the GCLs for
groundwater. A site vicinity map is included as Figure 3.

ATC performed subsequent sampling events in January 2013 and July 2013 and Aggressive Fluid Vapor
Extraction (AFVR) events in April, May and June 2013. The AFVR events were performed in order to
reduce the GCLs in monitoring well MW-1.

ATC submitted a Groundwater Monitoring Report on February 25, 2014, documenting groundwater-
sampling activities. Benzene concentrations in MW-1 exceeded the GCLs and the site met the criteria for
Intermediate risk.

Groundwater assessment activities were not performed at the site between 2014 and April 2021 due to site
access delays with the current property owner.

ATC submitted a Groundwater Monitoring Report on June 10, 2021, documenting groundwater-sampling
activities. Several volatile organic compounds were reported at concentrations in exceeding the 2L
Standards in MW-1 but were below the GCLs. The site was previously ranked intermediate due to GCL
exceedances in MW-1. Based on the reported constituent concentrations, the site was a candidate for
closure and ATC recommended conducting a confirmatory sampling event in August 2021.

ATC Submitted a Groundwater Monitoring Report on January 4, 2022, documenting groundwater-sampling
activities conducted in September and October 2021. Laboratory analytical results from groundwater
samples during the event revealed several volatile organic compounds (VOCs) reported at concentrations
exceeding the 2L Groundwater Standards in monitoring well MW-1. In addition, the 1,2-Dibromoethane
concentration revealed in well MW-1 exceeded the corresponding GCL.

ATC performed a groundwater sampling event in April 2022. Laboratory analytical results from groundwater
samples during the event revealed several volatile organic compounds (VOCs) reported at concentrations
exceeding the 2L Groundwater Standards in monitoring well MW-1. Based on the results of the groundwater
sampling event, ATC recommended continued sampling of the monitoring well network to monitor plume
stability.

ATC performed a groundwater sampling event in August 2022. The groundwater flow at the site within the
surficial aquifer is in the southwestern direction. LNAPL was not encountered during the August 2022
sampling event. Additionally, several petroleum constituents were reported at concentrations exceeding the
2L Groundwater Standards in monitoring well MW-1. 1,2-Dibromoethane concentrations in MW-1 exceeded
the CGLs. ATC recommended continued sampling of the monitoring well network to monitor plume stability.

4.0 SITE DESCRIPTION

The site is currently operated as a Walgreens pharmacy. No USTs are currently located on the property.

5.0 GROUNDWATER CHARACTERIZATION

5.1 GROUNDWATER LEVELS

Groundwater levels were measured in monitoring wells MW-1, MW-2, MW-4, and MW-7 on January 30,
2023. MW-3 could not be located during previous sampling events and is assumed destroyed. 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 across the site during the January 30, 2023, sampling event ranged
from 22.26 feet below ground surface (bgs) in MW-7 to 33.10 feet bgs in MW-2. Light non-aqueous phase
Former Conoco Store #33075 (RM #6143)
April 13, 2023
Page 4 of 4

ATC Proposal (or Project #) No. P666143707 Phillips 66 Company
liquid (LNAPL) was not encountered during the sampling event. Groundwater elevations for the sampling
event are listed in Table 1. A groundwater elevation contour map based on the January 30, 2023, sampling
event is included as Figure 4. The inferred groundwater flow direction within the surficial aquifer at the site
is to the southwestern direction.

5.2 GROUNDWATER QUALITY

ATC collected groundwater samples from MW-1, MW-2, MW-4, and MW-7 on January 30, 2023.
Groundwater samples were collected using a dedicated polyethylene disposable bailer. Prior to sampling,
a minimum of three well volumes of groundwater were removed from each monitoring well. Groundwater
samples were collected into laboratory-approved containers, packed in ice and delivered under chain-of-
custody protocol to SGS Laboratories in Scott, Louisiana for analysis. Groundwater samples were analyzed
for volatile organic compounds (VOCs) via EPA Method 6200B and EPA Method 504.1. A copy of the
laboratory analytical report is included in Appendix A.

Groundwater quality results exceeded the NCDEQ Groundwater Quality 2L Standards for the following
constituents and monitoring well locations:

• Benzene (2L Standard of 1 µg/L) in well MW-1 (1,790 µg/L)
• Benzene (2L Standard of 1 µg/L) in well MW-7 (2.4 µg/L)
• Toluene: (2L Standard of 600 µg/L) in well MW-1 (15,500 µg/L)
• Ethylbenzene: (2L Standard of 600 µg/L) in well MW-1 (1,350 µg/L)
• Total Xylenes: (2L Standard of 500 µg/L) in well MW-1 (7,810 µg/L)
• Methyl Tert Butyl Ether (2L Standard of 20 µg/L) in well MW-1 (33.5 µg/L)
• Naphthalene: (2L Standard of 6 µg/L) in well MW-1 (437 µg/L)
• 1,2,4-Trimethylbenzene: (2L Standard of 400 µg/L) in well MW-1 (1,020 µg/L)
• 1,3,5 – Trimethylbenzene: (2L Standard of 400 µg/L) in Well MW-1 (276 µg/L)
• 1,2-Dibromoethane: (2L Standard of 0.02 µg/L) in well MW-1 (8 µg/L)

None of the groundwater samples exceeded the GCLs. Constituents reported with “J” values indicate
estimated values below the standard reporting limits. Groundwater analytical results for the January 2023
sampling event are summarized in Table 2, and historical groundwater analytical results are summarized
in Table 3. Figure 5 illustrates the groundwater sample locations and a summary of the laboratory analytical
results.

6.0 CONCLUSIONS AND RECOMMENDATIONS

ATC has performed groundwater assessment activities at the Former Conoco Store #33075 in Winston
Salem, North Carolina. The purpose of the groundwater-sampling event was to confirm if the dissolved
constituent concentrations were below their respective GCL standards. Based on field activities,
observations, and groundwater analytical results, ATC concludes the following:

 The site was formerly a gasoline station with convenience store but currently operates as a Walgreens
pharmacy store;

 Historical soil analytical results indicated that ethylbenzene, naphthalene and 1,2,4-trimethylbenezene
exceeded the Residential MSCCs but were below the Industrial/Commercial MSCCs;

 Based on previous receptor surveys, there are no surface water bodies within 500 feet of the site and
there are no water supply wells within 1,000 feet of the site. The site was previously ranked
intermediate due to GCL exceedances in MW-1;

Former Conoco Store #33075 (RM #6143)
April 13, 2023
Page 5 of 4

ATC Proposal (or Project #) No. P666143707 Phillips 66 Company
 The groundwater flow at the site within the surficial aquifer is in the southwestern direction. LNAPL was
not encountered during the January 2023 sampling event; and

 Several petroleum constituents were reported at concentrations exceeding the 2L Groundwater
Standards in monitoring well MW-1. None of the detected constituents exceeded their respective GCLs.

Based on the results of the January 2023 groundwater-sampling event, ATC recommends continued
sampling of the monitoring well network to monitor plume stability. If VOC concentrations remain stable and
none of the constituents exceed the GCLs, site closure will be requested.
Former Conoco Store #33075 (RM #6143)
April 13, 2023

ATC Project No. P666143707 Phillips 66 Company
TABLES

TABLE 1
GROUNDWATER ELEVATION DATA
FORMER CONOCO STORE #33075 (RM #6143)
3488 ROBINHOOD ROAD
WINSTON SALEM, NORTH CAROLINA
4/22/2021 27.50 920.54
9/3/2021 28.42 919.62
10/13/2021 28.61 919.43
4/6/2022 29.21 918.83
8/30/2022 30.36 917.68
1/30/2023 30.71 917.33
4/22/2021 29.58 919.43
9/3/2021 33.50 915.51
10/13/2021 30.78 918.23
4/6/2022 31.53 917.48
8/30/2022 32.41 916.60
1/30/2023 33.10 915.91
4/22/2021 NM NM
9/3/2021 NM NM
10/13/2021 NM NM
4/6/2022 NM NM
4/22/2021 28.66 920.58
9/3/2021 29.05 920.19
10/13/2021 29.37 919.87
4/6/2022 30.32 918.92
8/30/2022 30.98 918.26
1/30/2023 31.78 917.46
4/22/2021 19.07 919.84
9/3/2021 20.28 918.63
10/13/2021 20.75 918.16
4/6/2022 20.73 918.18
8/30/2022 22.22 916.69
1/30/2023 22.26 916.65
Notes:
1. TOC = Top of casing.
2. ATC could not locate monitoring well MW-3.
3. NM = Not Measured.
40 20-40 949.24
37
948.04
MW-2 8/11/2006 2 0.010
25-37 938.91
2 0.010
949.01
MW-1 8/10/2006 2 0.010 40 20-40
4. Depth to groundwater measured from top of casing.
MW-4 8/11/2006
0.010 40 20-40
MW-7 1/8/2002 2 0.010
948.93MW-3 8/10/2006 2
Total Well
Depth (feet)
Screen Interval
(feet)Date Measured TOC Elevation
(feet)
40 20-40
Depth to Water
(feet)
Groundwater
Elevation (feet)Well Construction
Date
Well Diameter
(inches)
Slot Size
(inches)
Page 1 of 4
TABLE 2
GROUNDWATER ANALYTICAL DATA
FORMER CONOCO STORE #33075 (RM #6143)
3488 ROBINHOOD ROAD
WINSTON SALEM, NORTH CAROLINA
504.1
Monitoring
Well Date
BenzeneTolueneEthylbenzeneXylene (total)BTEXMethyl Tert Butyl EtherDi-Isopropyl EtherNaphthaleneAcetoneIsopropylbenzeneEthanolp-IsopropyltolueneMethyl BromideMethyl Chloride1,2,4-Trimethylbenzene1,3,5-Trimethylbenzene1,2-Dibromoethane1 600 600 500 NE 20 70 6 6,000 70 4,000 NE 10 3 400 400 0.02
5,000 260,000 80,000 50,000 NE 20,000 70,000 6,000 6,000,000 30,500 4,000,000 NE 100,000 3,000 28,500 24,100 50
MW-1 1/30/2023 1,790 15,550 1,350 7,810 26,500 33.5 2.2 437 791 J 58.8 52.2 14 0.29 J 0.16 J 1,020 276 8.0
MW-2 1/30/2023 <0.50 <0.50 <0.50 <0.50 ND <0.50 <0.50 <0.50 <10 <0.50 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.019
MW-4 1/30/2023 <0.50 <0.50 <0.50 <0.50 ND <0.50 <0.50 <0.50 <10 <0.50 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.019
MW-7 1/30/2023 2.4 <0.50 <0.50 0.24 J 2.64 1.7 0.20 J 0.22 J 2.2 J <0.50 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.018
Notes:
1. "<" or ND = Not detected at or above the laboratory detection limit.
2. Concentrations are reported in micrograms per liter (µg/l) = parts per billion.
3. 2L Standard = Title 15A NCAC 2L .0202 Groundwater Standard.
4. Concentrations in BOLD print equal or exceed the NCDEQ 2L Standard (2L).
5. Concentrations in Italics exceed GCLs.
6. GCL = GCL = Gross Contaminant Level established by NCDEQ.
7. NE = Not Established.
8. BTEX = Benzene, Toluene, Ethylbenzene, and Total Xylenes.
2L Standard
GCL
6200BAnalytical Method:
Page 2 of 4
TABLE 3
HISTORICAL GROUNDWATER ANALYTICAL DATA
FORMER CONOCO STORE #33075 (RM #6143)
3488 ROBINHOOD ROAD
WINSTON SALEM, NORTH CAROLINA
Ethyl-Total Total
benzene Xylenes BTEX
1 600 600 500 NE 20 70 6 0.02
5,000 260,000 80,000 50,000 NE 20,000 70,000 6,000 50
8/25/2006 8,800 27,000 1,900 11,000 48,700 960 33 890 68
5/10/2012 6,300 30,000 2,300 12,800 51,400 480 30 750 27
1/10/2013 5,600 25,000 2,100 11,400 44,100 420 <100 550 <100
7/9/2013 4,600 22,000 1,800 9,600 38,000 230 16J 510 17J
11/21/2013 6,700 37,000 2,500 13,900 60,100 310 <100 660 34J
4/22/2021 763 9,050 1,540 8,730 20,083 <100 <100 440 <100
9/3/2021 2,640 35,400 2,310 12,700 53,050 75.8 J <100 842 57.9 J
10/13/2021 NA NA NA NA NA NA NA NA 84.2*
4/6/2022 1,390 12,100 1,430 7,890 22,810 <100 <100 299 6.3*
8/30/2022 3,080 43,800 2,440 15,200 64,520 <250 <250 726 63.8*
1/30/2023 1,790 15,550 1,350 7,810 26,500 33.5 2.2 437 8.0*
8/25/2006 <0.5 <0.7 <0.8 <0.8 ND <0.5 <0.8 <1 <1
6/12/2012 <0.5 <0.5 <0.5 <0.5 ND <0.5 <0.5 <0.5 <0.5
1/10/2013 <0.5 <0.5 <0.5 <0.5 ND <0.5 <0.5 <0.5 <0.5
7/9/2013 <0.5 <0.5 <0.5 <0.5 ND <0.5 <0.5 <0.5 <0.5
11/21/2013 <0.5 <0.5 <0.5 <0.5 ND <0.5 <0.5 <0.5 <0.5
4/22/2021 <0.50 <0.50 <0.50 <0.50 ND <0.50 <0.50 <0.50 <0.50
9/3/2021 <0.50 <0.50 <0.50 <0.50 ND <0.50 <0.50 <0.50 <0.50
10/13/2021 NA NA NA NA NA NA NA NA <0.020*
4/6/2022 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.020*
8/30/2022 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.020*
1/30/2023 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.019*
8/25/2006 0.8 4 <0.8 0.8 4.8 <0.5 <0.8 <1 <1
6/12/2012
1/10/2013
7/9/2013
11/21/2013
4/22/2021
9/3/2021
10/13/2021
4/6/2022
Notes:
1. "<" or ND = Not detected at or above the laboratory detection limit.
2. Concentrations are reported in micrograms per liter (µg/l) = parts per billion.
3. 2L Standard = Title 15A NCAC 2L .0202 Groundwater Standard.
4. Concentrations in BOLD print equal or exceed the NCDEQ 2L Standard (2L).
5. Concentrations in Italics exceed GCLs.
6. EDB = Ethylene dibromide (1,2-dibromoethane).
7. GCL = Gross Contaminantion Level are referenced in the "Guidelines for Assessment and Corrective Action", dated October 2020.
8. NE = Not Established.
9. BTEX = Benzene, Toluene, Ethylbenzene, and Total Xylenes.
10. MTBE = Methyl Tertiary Butyl Ether.
11. IPE = Isopropyl Ether.
12. NA = Not Analyzed.
13. J = Concentration detected below reporting limit.
14. * = Sample analyzed by Method 504.1 (EDB)
Not Sampled/Could Not Locate
NaphthaleneBenzene
MW-3
EDB
Not Sampled/Could Not Locate
Not Sampled/Could Not Locate
Toluene MTBE
Not Sampled/Could Not Locate
Not Sampled/Could Not Locate
Date
Not Sampled/Could Not Locate
MW-2
Not Sampled/Could Not Locate
IPEMonitoring Well
Not Sampled/Could Not Locate
MW-1
2L Standard
GCL
Page 3 of 4
TABLE 3
HISTORICAL GROUNDWATER ANALYTICAL DATA
FORMER CONOCO STORE #33075 (RM #6143)
3488 ROBINHOOD ROAD
WINSTON SALEM, NORTH CAROLINA
Ethyl-Total Total
benzene Xylenes BTEX
1 600 600 500 NE 20 70 6 0.02
5,000 260,000 80,000 50,000 NE 20,000 70,000 6,000 50
NaphthaleneBenzene EDBTolueneMTBEDateIPEMonitoring Well
2L Standard
GCL
1/10/2013 <0.5 <0.5 <0.5 <0.5 ND <0.5 <0.5 <0.5 <0.5
7/9/2013 <0.5 <0.5 <0.5 <0.5 ND <0.5 <0.5 <0.5 <0.5
11/21/2013 <0.5 <0.5 <0.5 <0.5 ND <0.5 <0.5 <0.5 <0.5
4/22/2021 <0.50 <0.50 <0.50 <0.50 ND <0.50 <0.50 <0.50 <0.50
9/3/2021 <0.50 <0.50 <0.50 <0.50 ND <0.50 <0.50 <0.50 <0.50
10/13/2021 NA NA NA NA NA NA NA NA <0.020*
4/6/2022 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.020*
8/30/2022 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.021*
1/30/2023 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.019*
1/24/2002 500 9.7 5.1 150 664.8 <25 <25 NA <0.02
6/4/2002 430 10 <10 140 580 <50 <50 NA <0.02
8/13/2002 450 13 9.2 190 662.2 560 <25 NA <0.02
8/25/2006 660 16 28 440 1,144 150 10 36 <1
5/10/2012 240 <2.5 0.6J 76 316.6 39 2.6 19 <2.5
1/10/2013 220 <2.5 <2.5 29.3 249.3 29 <2.5 14 <2.5
7/9/2013 8.1 <0.5 <0.5 4.8 12.9 23 1.4 1.3 <0.5
11/21/2013 29 <0.5 0.1J 9.5 38.6 17 1.1 3.6 <0.5
4/22/2021 <0.50 <0.50 <0.50 <0.50 ND 4.1 <0.50 <0.50 <0.50
9/3/2021 2.8 <0.50 <0.50 0.32 J 3.1 3.3 0.30 J 0.28 J <0.50
10/13/2021 NA NA NA NA NA NA NA NA <0.020*
4/6/2022 <0.50 <0.50 <0.50 <0.50 <0.50 3 <0.50 <0.50 <0.020*
8/30/2022 3.4 <0.50 <0.50 0.34 J 3.74 2.8 0.29 J 0.30 J <0.021*
1/30/2023 2.4 <0.50 <0.50 0.24 J 2.64 1.7 J 0.20 J 0.22 J <0.019*
Notes:
1. "<" or ND = Not detected at or above the laboratory detection limit.
2. Concentrations are reported in micrograms per liter (µg/l) = parts per billion.
3. 2L Standard = Title 15A NCAC 2L .0202 Groundwater Standard.
4. Concentrations in BOLD print equal or exceed the NCDEQ 2L Standard (2L).
5. Concentrations in Italics exceed GCLs.
6. EDB = Ethylene dibromide (1,2-dibromoethane).
7. GCL = Gross Contaminantion Level are referenced in the "Guidelines for Assessment and Corrective Action", dated October 2020.
8. NE = Not Established.
9. BTEX = Benzene, Toluene, Ethylbenzene, and Total Xylenes.
10. MTBE = Methyl Tertiary Butyl Ether.
11. IPE = Isopropyl Ether.
12. NA = Not Analyzed.
13. J = Concentration detected below reporting limit.
14. * = Sample analyzed by Method 504.1 (EDB)
MW-7
MW-4
Page 4 of 4
Former Conoco Store #33075 (RM #6143)
April 13, 2023

ATC Project No. P666143707 Phillips 66 Company
FIGURES

2725 E. Millbrook Road, Suite 121
Raleigh, NC 27604
[phone]
FIGURE 1:
SITE TOPOGRAPHIC MAP
PROJECT NO: 45.75118.6143
REVIEWED BY:GA SCALE: NTS DATE: 08/2022
FORMER CONOCO STORE #33075 (RM #6143)
3488 ROBINHOOD ROAD
WINSTON SALEM, NORTH CAROLINA
NCDENR INCIDENT No. 14899
SOURCE:USGS 7.5’ WINSTON SALEM-WEST QUADRANGLE, NC. CREATED IN 1950, UPDATED 1994.
SITE
N
ROBINHOOD ROADLEINBACH PLAZA DRIVESCALE: 1" = 40'40010203040NROBINHOODMEDICALPLAZAKANGAROOEXPRSSTEDDY G'SGRILLBANKVACANTWALGREENSFORMERBUILINGFORMERCANOPYFORMERUSTMW-1MW-4MW-3MW-2MW-7LEGEND:SITE PROPERTY LINENOTE: ALL LOCATIONS ARE APPROXIMATEPARCEL LINEMW-1MONITORING WELLWell IdentificationFigure:Drawing File:
Project Number:
Ckd. By:
Drn. By:
App'd By:
Ckd. Date:Scale:Date:H:\2021\OTHER OFFICES\NORTH CAROLINA\NCDEQ-STATE LEAD\PHILLIP 66\RM #6143\P666143707-SITE.DWG, FIG2
SITE MAP11/22/2021SEE LOWER LEFTFORMER CONOCO STORE #33075 (RM #6143)
3488 ROBINHOOD ROAD
WINSTON - SALEM, NORTH CAROLINA
P666143707AS SHOWNDH
CH2NOTES:
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
2725 E. Millbrook Road, Suite 121
Raleigh, NC 27604
[phone]
FIGURE 3:
SITE VICINITY MAP
PROJECT NO: 45.75118.6143
REVIEWED BY:GA SCALE: 1” = 333’DATE: 08/2022
FORMER CONOCO STORE #33075 (RM #6143)
3488 ROBINHOOD ROAD
WINSTON SALEM, NORTH CAROLINA
NCDENR INCIDENT No. 14899
SOURCE: Forsyth County GIS
N
Water Supply Well
500 Foot Radius
1,000 Foot Radius
SITE
ROBINHOOD ROADLEINBACH PLAZA DRIVEROBINHOODMEDICALPLAZAKANGAROOEXPRSSTEDDY G'SGRILLBANKVACANTWALGREENSFORMERBUILINGFORMERCANOPYFORMERUSTMW-1MW-4MW-3MW-2MW-7LEGEND:SITE PROPERTY LINENOTE: ALL LOCATIONS ARE APPROXIMATEPARCEL LINE916.5GROUNDWATER ELEVATION CONTOUR(DASHED WHERE INFERRED) (ft)GROUNDWATER FLOW DIRECTIONMW-2918.23MONITORING WELLWell IdentificationMean Sea Level Groundwater Elevation (ft)917.46917.33916.65915.91NMSCALE: 1" = 40'010203040N916.0916.5917.0Figure:Drawing File:
Project Number:
Ckd. By:
Drn. By:
App'd By:
Ckd. Date:Scale:Date:H:\2023\1 OTHER OFFICES\NORTH CAROLINA\NCDEQ-STATE LEAD\PHILLIP 66\RM 6143\P666143254-POT.DWG, FIG4
GROUNDWATER ELEVATION CONTOUR MAP04/12/2023SEE LOWER LEFTFORMER CONOCO STORE #33075 (RM #6143)
3488 ROBINHOOD ROAD
WINSTON - SALEM, NORTH CAROLINA
P666143254AS SHOWNDH
CL4NOTES:
1.Features shown are not an authoritative location, nor are they presented
to a state d accuracy.
2.Groundwater elevations measured on 01/30/2023.
3.NM = Not Measured
COORDINATE SYSTEM:
NAD 1983 NORTH CAROLINA STATE PLANE FIPS 3200, US SURVEY FEET
ROBINHOOD ROADLEINBACH PLAZA DRIVEROBINHOODMEDICALPLAZAKANGAROOEXPRSSTEDDY G'SGRILLBANKVACANTWALGREENSFORMERBUILINGFORMERCANOPYFORMERUSTMW-1MW-4MW-3MW-2MW-7LEGEND:SITE PROPERTY LINENOTE: ALL LOCATIONS ARE APPROXIMATEPARCEL LINEMW-1MONITORING WELLWell IdentificationSCALE: 1" = 40'010203040NFigure:Drawing File:
Project Number:
Ckd. By:
Drn. By:
App'd By:
Ckd. Date:Scale:Date:H:\2023\1 OTHER OFFICES\NORTH CAROLINA\NCDEQ-STATE LEAD\PHILLIP 66\RM 6143\P666143254-GW.DWG, FIG5
OTHER CHEMICAL OF CONCERN
IN GROUNDWATER04/12/2023SEE LOWER LEFTFORMER CONOCO STORE #33075 (RM #6143)
3488 ROBINHOOD ROAD
WINSTON - SALEM, NORTH CAROLINA
P666143254AS SHOWNDH
LS5NOTES:
1.Features shown are not an authoritative location, nor are they presented
to a stated accuracy.
2.Groundwater samples collected on 01/30/2023.
3.µg/L = microgram per liter
COORDINATE SYSTEM:
NAD 1983 NORTH CAROLINA STATE PLANE FIPS 3200, US SURVEY FEET
Former Conoco Store #33075 (RM #6143)
April 13, 2023

ATC Project No. P666143707 Phillips 66 Company
APPENDIX A

LABORATORY ANALYTICAL REPORT

02/13/23
Technical Report for
Atlas
RM #6143-Winston-Salem, NC
SGS Job Number: LA87576
Sampling Date: 01/30/23
Report to:
ATC Group Services LLC.
2725 East Millbrook Road Suite 121
Raleigh, NC 27604
[e-mail]; [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.
Client Service contact: Rebecca Hebert 337-237-4775
Kesavalu Bagawandoss
General Manager
Scott, LA 02/13/23
e-Hardcopy 2.0
Automated Report
47
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 47
LA87576
Table of Contents
-1-
Sections:
Section 1: Sample Summary ...................................................................................................3
Section 2: Summary of Hits ....................................................................................................4
Section 3: Sample Results ........................................................................................................5
3.1: LA87576-1: MW-1 .......................................................................................................6
3.2: LA87576-2: MW-2 .......................................................................................................10
3.3: LA87576-3: MW-4 .......................................................................................................14
3.4: LA87576-4: MW-7 .......................................................................................................18
Section 4: Misc. Forms ............................................................................................................22
4.1: Chain of Custody ...........................................................................................................23
Section 5: MS Volatiles - QC Data Summaries .....................................................................26
5.1: Method Blank Summary ................................................................................................27
5.2: Blank Spike/Blank Spike Duplicate Summary ..............................................................33
5.3: Matrix Spike/Matrix Spike Duplicate Summary ...........................................................39
Section 6: GC Volatiles - QC Data Summaries .....................................................................45
6.1: Method Blank Summary ................................................................................................46
6.2: Blank Spike/Blank Spike Duplicate Summary ..............................................................47 1234562 of 47
LA87576
SGS North America Inc.
Sample Summary
Atlas
Job No:LA87576
RM #6143-Winston-Salem, 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
LA87576-1 01/30/23 12:15 CH 02/06/23 AQ Ground Water MW-1
LA87576-2 01/30/23 11:15 CH 02/06/23 AQ Ground Water MW-2
LA87576-3 01/30/23 11:45 CH 02/06/23 AQ Ground Water MW-4
LA87576-4 01/30/23 10:45 CH 02/06/23 AQ Ground Water MW-7
3 of 47
LA875761
Summary of Hits Page 1 of 1
Job Number:LA87576
Account:Atlas
Project:RM #6143-Winston-Salem, NC
Collected:01/30/23
Lab Sample ID Client Sample ID Result/
Analyte Qual RL MDL Units Method
LA87576-1 MW-1
Acetone 791 J 5000 620 ug/l SM 6200B
Benzene 1790 250 140 ug/l SM 6200B
sec-Butylbenzene a 6.5 0.50 0.14 ug/l SM 6200B
Di-Isopropyl Ether a 2.2 0.50 0.073 ug/l SM 6200B
Ethyl Alcohol a 52.2 50 8.4 ug/l SM 6200B
Ethylbenzene 1350 250 100 ug/l SM 6200B
Isopropylbenzene a 58.8 0.50 0.13 ug/l SM 6200B
p-Isopropyltoluene a 14.0 0.50 0.13 ug/l SM 6200B
Methyl Bromide a 0.29 J 0.50 0.23 ug/l SM 6200B
Methyl Chloride a 0.16 J 0.50 0.066 ug/l SM 6200B
Methyl Tert Butyl Ether a 33.5 0.50 0.068 ug/l SM 6200B
Naphthalene 437 250 50 ug/l SM 6200B
Toluene 15500 250 150 ug/l SM 6200B
1,2,4-Trimethylbenzene 1020 250 73 ug/l SM 6200B
1,3,5-Trimethylbenzene 276 250 81 ug/l SM 6200B
m,p-Xylene 5230 500 170 ug/l SM 6200B
o-Xylene 2580 250 74 ug/l SM 6200B
Xylene (total)7810 250 81 ug/l SM 6200B
1,2-Dibromoethane 8.0 0.096 0.018 ug/l EPA 504.1
LA87576-2 MW-2
No hits reported in this sample.
LA87576-3 MW-4
No hits reported in this sample.
LA87576-4 MW-7
Acetone 2.2 J 10 1.2 ug/l SM 6200B
Benzene 2.4 0.50 0.27 ug/l SM 6200B
Di-Isopropyl Ether 0.20 J 0.50 0.073 ug/l SM 6200B
Methyl Tert Butyl Ether 1.7 0.50 0.068 ug/l SM 6200B
Naphthalene 0.22 J 0.50 0.10 ug/l SM 6200B
o-Xylene 0.24 J 0.50 0.15 ug/l SM 6200B
Xylene (total)0.24 J 0.50 0.16 ug/l SM 6200B
(a) Internal standards are not within control limits due to matrix interference. Confirmed by reanalysis at
dilution.
4 of 47
LA875762
SGS North America Inc.
Sample Results
Report of Analysis
Scott, LA
Section 3
5 of 47
LA875763
SGS North America Inc.
Report of Analysis Page 1 of 3
Client Sample ID:MW-1
Lab Sample ID:LA87576-1 Date Sampled:01/30/23
Matrix:AQ - Ground Water Date Received:02/06/23
Method:SM 6200B Percent Solids:n/a
Project:RM #6143-Winston-Salem, NC
File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
Run #1 a 1Q01463635.D 1 02/07/23 17:14 MB n/a n/a V1Q3221
Run #2 1Q01463650.D 500 02/08/23 13:52 MB n/a n/a V1Q3222
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 791 b 5000 620 ug/l J
71-43-2 Benzene 1790 b 250 140 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 6.5 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
6 of 47
LA8757633.1
SGS North America Inc.
Report of Analysis Page 2 of 3
Client Sample ID:MW-1
Lab Sample ID:LA87576-1 Date Sampled:01/30/23
Matrix:AQ - Ground Water Date Received:02/06/23
Method:SM 6200B Percent Solids:n/a
Project:RM #6143-Winston-Salem, 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
64-17-5 Ethyl Alcohol 52.2 50 8.4 ug/l
100-41-4 Ethylbenzene 1350 b 250 100 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 58.8 0.50 0.13 ug/l
99-87-6 p-Isopropyltoluene 14.0 0.50 0.13 ug/l
74-83-9 Methyl Bromide 0.29 0.50 0.23 ug/l J
74-87-3 Methyl Chloride 0.16 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 33.5 0.50 0.068 ug/l
91-20-3 Naphthalene 437 b 250 50 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
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 15500 b 250 150 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 1020 b 250 73 ug/l
108-67-8 1,3,5-Trimethylbenzene 276 b 250 81 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 5230 b 500 170 ug/l
95-47-6 o-Xylene 2580 b 250 74 ug/l
1330-20-7 Xylene (total)7810 b 250 81 ug/l
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
17060-07-0 1,2-Dichloroethane-D4 81%101%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
7 of 47
LA8757633.1
SGS North America Inc.
Report of Analysis Page 3 of 3
Client Sample ID:MW-1
Lab Sample ID:LA87576-1 Date Sampled:01/30/23
Matrix:AQ - Ground Water Date Received:02/06/23
Method:SM 6200B Percent Solids:n/a
Project:RM #6143-Winston-Salem, NC
VOA Special List
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
2037-26-5 Toluene-D8 56% c 104%70-130%
460-00-4 4-Bromofluorobenzene 100%107%70-130%
(a) Internal standards are not within control limits due to matrix interference. Confirmed by reanalysis at
dilution.
(b) Result is from Run# 2
(c) Outside control limits due to matrix interference. Confirmed by reanalysis as a dilution.
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
8 of 47
LA8757633.1
SGS North America Inc.
Report of Analysis Page 1 of 1
Client Sample ID:MW-1
Lab Sample ID:LA87576-1 Date Sampled:01/30/23
Matrix:AQ - Ground Water Date Received:02/06/23
Method:EPA 504.1 EPA 504 Percent Solids:n/a
Project:RM #6143-Winston-Salem, NC
File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
Run #1 LI137685.D 1 02/09/23 23:38 JT 02/09/23 18:00 OP22195 GLI1228
Run #2 LI137724.D 5 02/12/23 10:46 JT 02/09/23 18:00 OP22195 GLI1228
Initial Volume Final Volume
Run #1 36.3 ml 2.0 ml
Run #2 36.3 ml 2.0 ml
CAS No.Compound Result RL MDL Units Q
106-93-4 1,2-Dibromoethane 8.0 a 0.096 0.018 ug/l
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
348-51-6 1-Chloro-2-fluorobenzene 113%147% b 70-130%
(a) Result is from Run# 2
(b) Outside control limits due to dilution.
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
9 of 47
LA8757633.1
SGS North America Inc.
Report of Analysis Page 1 of 3
Client Sample ID:MW-2
Lab Sample ID:LA87576-2 Date Sampled:01/30/23
Matrix:AQ - Ground Water Date Received:02/06/23
Method:SM 6200B Percent Solids:n/a
Project:RM #6143-Winston-Salem, NC
File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
Run #1 1Q01463631.D 1 02/07/23 15:22 MB n/a n/a V1Q3221
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
10 of 47
LA8757633.2
SGS North America Inc.
Report of Analysis Page 2 of 3
Client Sample ID:MW-2
Lab Sample ID:LA87576-2 Date Sampled:01/30/23
Matrix:AQ - Ground Water Date Received:02/06/23
Method:SM 6200B Percent Solids:n/a
Project:RM #6143-Winston-Salem, 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
64-17-5 Ethyl Alcohol ND 50 8.4 ug/l
100-41-4 Ethylbenzene ND 0.50 0.20 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
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
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 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
11 of 47
LA8757633.2
SGS North America Inc.
Report of Analysis Page 3 of 3
Client Sample ID:MW-2
Lab Sample ID:LA87576-2 Date Sampled:01/30/23
Matrix:AQ - Ground Water Date Received:02/06/23
Method:SM 6200B Percent Solids:n/a
Project:RM #6143-Winston-Salem, NC
VOA Special List
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
2037-26-5 Toluene-D8 108%70-130%
460-00-4 4-Bromofluorobenzene 105%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
12 of 47
LA8757633.2
SGS North America Inc.
Report of Analysis Page 1 of 1
Client Sample ID:MW-2
Lab Sample ID:LA87576-2 Date Sampled:01/30/23
Matrix:AQ - Ground Water Date Received:02/06/23
Method:EPA 504.1 EPA 504 Percent Solids:n/a
Project:RM #6143-Winston-Salem, NC
File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
Run #1 LI137686.D 1 02/09/23 23:56 JT 02/09/23 18:00 OP22195 GLI1228
Run #2
Initial Volume Final Volume
Run #1 35.9 ml 2.0 ml
Run #2
CAS No.Compound Result RL MDL Units Q
106-93-4 1,2-Dibromoethane ND 0.019 0.0037 ug/l
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
348-51-6 1-Chloro-2-fluorobenzene 95%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
13 of 47
LA8757633.2
SGS North America Inc.
Report of Analysis Page 1 of 3
Client Sample ID:MW-4
Lab Sample ID:LA87576-3 Date Sampled:01/30/23
Matrix:AQ - Ground Water Date Received:02/06/23
Method:SM 6200B Percent Solids:n/a
Project:RM #6143-Winston-Salem, NC
File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
Run #1 1Q01463651.D 1 02/08/23 14:20 MB n/a n/a V1Q3222
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
14 of 47
LA8757633.3
SGS North America Inc.
Report of Analysis Page 2 of 3
Client Sample ID:MW-4
Lab Sample ID:LA87576-3 Date Sampled:01/30/23
Matrix:AQ - Ground Water Date Received:02/06/23
Method:SM 6200B Percent Solids:n/a
Project:RM #6143-Winston-Salem, 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
64-17-5 Ethyl Alcohol ND 50 8.4 ug/l
100-41-4 Ethylbenzene ND 0.50 0.20 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
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
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 100%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
15 of 47
LA8757633.3
SGS North America Inc.
Report of Analysis Page 3 of 3
Client Sample ID:MW-4
Lab Sample ID:LA87576-3 Date Sampled:01/30/23
Matrix:AQ - Ground Water Date Received:02/06/23
Method:SM 6200B Percent Solids:n/a
Project:RM #6143-Winston-Salem, NC
VOA Special List
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
2037-26-5 Toluene-D8 105%70-130%
460-00-4 4-Bromofluorobenzene 105%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
16 of 47
LA8757633.3
SGS North America Inc.
Report of Analysis Page 1 of 1
Client Sample ID:MW-4
Lab Sample ID:LA87576-3 Date Sampled:01/30/23
Matrix:AQ - Ground Water Date Received:02/06/23
Method:EPA 504.1 EPA 504 Percent Solids:n/a
Project:RM #6143-Winston-Salem, NC
File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
Run #1 LI137687.D 1 02/10/23 00:14 JT 02/09/23 18:00 OP22195 GLI1228
Run #2
Initial Volume Final Volume
Run #1 36.9 ml 2.0 ml
Run #2
CAS No.Compound Result RL MDL Units Q
106-93-4 1,2-Dibromoethane ND 0.019 0.0036 ug/l
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
348-51-6 1-Chloro-2-fluorobenzene 98%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
17 of 47
LA8757633.3
SGS North America Inc.
Report of Analysis Page 1 of 3
Client Sample ID:MW-7
Lab Sample ID:LA87576-4 Date Sampled:01/30/23
Matrix:AQ - Ground Water Date Received:02/06/23
Method:SM 6200B Percent Solids:n/a
Project:RM #6143-Winston-Salem, NC
File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
Run #1 1Q01463632.D 1 02/07/23 15:50 MB n/a n/a V1Q3221
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 2.2 10 1.2 ug/l J
71-43-2 Benzene 2.4 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 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
18 of 47
LA8757633.4
SGS North America Inc.
Report of Analysis Page 2 of 3
Client Sample ID:MW-7
Lab Sample ID:LA87576-4 Date Sampled:01/30/23
Matrix:AQ - Ground Water Date Received:02/06/23
Method:SM 6200B Percent Solids:n/a
Project:RM #6143-Winston-Salem, 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 0.20 0.50 0.073 ug/l J
64-17-5 Ethyl Alcohol ND 50 8.4 ug/l
100-41-4 Ethylbenzene ND 0.50 0.20 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 1.7 0.50 0.068 ug/l
91-20-3 Naphthalene 0.22 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
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
95-47-6 o-Xylene 0.24 0.50 0.15 ug/l J
1330-20-7 Xylene (total)0.24 0.50 0.16 ug/l J
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
17060-07-0 1,2-Dichloroethane-D4 102%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
19 of 47
LA8757633.4
SGS North America Inc.
Report of Analysis Page 3 of 3
Client Sample ID:MW-7
Lab Sample ID:LA87576-4 Date Sampled:01/30/23
Matrix:AQ - Ground Water Date Received:02/06/23
Method:SM 6200B Percent Solids:n/a
Project:RM #6143-Winston-Salem, NC
VOA Special List
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
2037-26-5 Toluene-D8 106%70-130%
460-00-4 4-Bromofluorobenzene 104%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
20 of 47
LA8757633.4
SGS North America Inc.
Report of Analysis Page 1 of 1
Client Sample ID:MW-7
Lab Sample ID:LA87576-4 Date Sampled:01/30/23
Matrix:AQ - Ground Water Date Received:02/06/23
Method:EPA 504.1 EPA 504 Percent Solids:n/a
Project:RM #6143-Winston-Salem, NC
File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
Run #1 LI137688.D 1 02/10/23 00:33 JT 02/09/23 18:00 OP22195 GLI1228
Run #2
Initial Volume Final Volume
Run #1 39.5 ml 2.0 ml
Run #2
CAS No.Compound Result RL MDL Units Q
106-93-4 1,2-Dibromoethane ND 0.018 0.0034 ug/l
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
348-51-6 1-Chloro-2-fluorobenzene 98%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
21 of 47
LA8757633.4
SGS North America Inc.
Misc. Forms
Custody Documents and Other Forms
Includes the following where applicable:
• Chain of Custody
Scott, LA
Section 4
22 of 47
LA875764
CHAIN OF CUSTODY PAGE oFI I
SGS onh America lnc. - Scott
500 Ambassador caffsry Parkway. Scotl, LA 70583
IEL. 337.237.4775 FAX: [phone] ,., -?, ,., ---a /,^
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amil*" *"*u":"1""1Note: Sample inventory
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E comn.rcri'x' (L.wl l) E rRRP
E conh.6Ll 'E' ( t.v.l 2) C RECAP
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Colrercld'B' = R6ulls + Qc summary
c(mrclll'C'= R6uh3 + oc sulr@ry + Padd Raw o6la
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LA87576: Chain of Custody
Page 1 of 3
23 of 47
LA8757644.1
To SAMPLE htusvtnu
SGS SC()TT LA LABORATORY
100 coillMrsst0N BLVD
LAFAYETTE LA 70508
(831 287 - 1775
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LA87576: Chain of Custody
Page 2 of 3
24 of 47
LA8757644.1
SGS Sample Receipt Summary
Job Number:LA87576 Client:ATC
Date / Time Received:2/6/2023 9:30:00 AM Delivery Method:FedEx
Project:RM 6143
4. No. Coolers:1
Airbill #'s:5707 9050 6845
Cooler Security
1. Custody Seals Present:
Y or N
2. Custody Seals Intact:
3. COC Present:
4. Smpl Dates/Time OK
2. Thermometer ID:
Cooler Temperature Y or N
1. Temp criteria achieved:
3. Cooler media:
IR001;
Ice (direct contact)
Quality Control Preservation 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 (Initial/Adjusted):#1: (1.6/1.6); IR001
LA87576: Chain of Custody
Page 3 of 3
25 of 47
LA8757644.1
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 5
26 of 47
LA875765
Method Blank Summary Page 1 of 3
Job Number:LA87576
Account:ATCNCR Atlas
Project:RM #6143-Winston-Salem, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V1Q3221-MB1 1Q01463624.D 1 02/07/23 MB n/a n/a V1Q3221
The QC reported here applies to the following samples:Method: SM 6200B
LA87576-1, LA87576-2, LA87576-4
CAS No.Compound Result RL MDL Units Q
67-64-1 Acetone 1.4 10 1.2 ug/l J
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
64-17-5 Ethyl Alcohol ND 50 8.4 ug/l
100-41-4 Ethylbenzene ND 0.50 0.20 ug/l
27 of 47
LA8757655.1.1
Method Blank Summary Page 2 of 3
Job Number:LA87576
Account:ATCNCR Atlas
Project:RM #6143-Winston-Salem, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V1Q3221-MB1 1Q01463624.D 1 02/07/23 MB n/a n/a V1Q3221
The QC reported here applies to the following samples:Method: SM 6200B
LA87576-1, LA87576-2, LA87576-4
CAS No.Compound Result RL MDL Units Q
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
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
95-47-6 o-Xylene ND 0.50 0.15 ug/l
1330-20-7 Xylene (total)ND 0.50 0.16 ug/l
28 of 47
LA8757655.1.1
Method Blank Summary Page 3 of 3
Job Number:LA87576
Account:ATCNCR Atlas
Project:RM #6143-Winston-Salem, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V1Q3221-MB1 1Q01463624.D 1 02/07/23 MB n/a n/a V1Q3221
The QC reported here applies to the following samples:Method: SM 6200B
LA87576-1, LA87576-2, LA87576-4
CAS No.Surrogate Recoveries Limits
17060-07-0 1,2-Dichloroethane-D4 99%70-130%
2037-26-5 Toluene-D8 107%70-130%
460-00-4 4-Bromofluorobenzene 105%70-130%
29 of 47
LA8757655.1.1
Method Blank Summary Page 1 of 3
Job Number:LA87576
Account:ATCNCR Atlas
Project:RM #6143-Winston-Salem, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V1Q3222-MB1 1Q01463648.D 1 02/08/23 MB n/a n/a V1Q3222
The QC reported here applies to the following samples:Method: SM 6200B
LA87576-1, LA87576-3
CAS No.Compound Result RL MDL Units Q
67-64-1 Acetone 1.4 10 1.2 ug/l J
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
64-17-5 Ethyl Alcohol ND 50 8.4 ug/l
100-41-4 Ethylbenzene ND 0.50 0.20 ug/l
30 of 47
LA8757655.1.2
Method Blank Summary Page 2 of 3
Job Number:LA87576
Account:ATCNCR Atlas
Project:RM #6143-Winston-Salem, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V1Q3222-MB1 1Q01463648.D 1 02/08/23 MB n/a n/a V1Q3222
The QC reported here applies to the following samples:Method: SM 6200B
LA87576-1, LA87576-3
CAS No.Compound Result RL MDL Units Q
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
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
95-47-6 o-Xylene ND 0.50 0.15 ug/l
1330-20-7 Xylene (total)ND 0.50 0.16 ug/l
31 of 47
LA8757655.1.2
Method Blank Summary Page 3 of 3
Job Number:LA87576
Account:ATCNCR Atlas
Project:RM #6143-Winston-Salem, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V1Q3222-MB1 1Q01463648.D 1 02/08/23 MB n/a n/a V1Q3222
The QC reported here applies to the following samples:Method: SM 6200B
LA87576-1, LA87576-3
CAS No.Surrogate Recoveries Limits
17060-07-0 1,2-Dichloroethane-D4 99%70-130%
2037-26-5 Toluene-D8 105%70-130%
460-00-4 4-Bromofluorobenzene 106%70-130%
32 of 47
LA8757655.1.2
Blank Spike/Blank Spike Duplicate Summary Page 1 of 3
Job Number:LA87576
Account:ATCNCR Atlas
Project:RM #6143-Winston-Salem, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V1Q3221-BS1 1Q01463621.D 1 02/07/23 MB n/a n/a V1Q3221
V1Q3221-BSD1 1Q01463622.D 1 02/07/23 MB n/a n/a V1Q3221
The QC reported here applies to the following samples:Method: SM 6200B
LA87576-1, LA87576-2, LA87576-4
Spike BSP BSP BSD BSD Limits
CAS No.Compound ug/l ug/l %ug/l %RPD Rec/RPD
67-64-1 Acetone 50 44.5 89 46.5 93 4 70-130/30
71-43-2 Benzene 20 17.9 90 18.2 91 2 70-130/30
108-86-1 Bromobenzene 20 18.5 93 18.8 94 2 70-130/30
74-97-5 Bromochloromethane 20 18.4 92 18.9 95 3 70-130/30
75-27-4 Bromodichloromethane 20 19.8 99 20.2 101 2 70-130/30
75-25-2 Bromoform 20 24.4 122 25.0 125 2 70-130/30
104-51-8 n-Butylbenzene 20 18.1 91 18.3 92 1 70-130/30
135-98-8 sec-Butylbenzene 20 17.3 87 17.6 88 2 70-130/30
98-06-6 tert-Butylbenzene 20 17.7 89 17.9 90 1 70-130/30
56-23-5 Carbon Tetrachloride 20 19.6 98 19.8 99 1 70-130/30
108-90-7 Chlorobenzene 20 17.7 89 18.1 91 2 70-130/30
75-00-3 Chloroethane 20 17.3 87 16.3 82 6 60-140/30
67-66-3 Chloroform 20 17.4 87 18.0 90 3 70-130/30
95-49-8 o-Chlorotoluene 20 17.2 86 17.5 88 2 70-130/30
106-43-4 p-Chlorotoluene 20 17.4 87 17.5 88 1 70-130/30
124-48-1 Dibromochloromethane 20 23.0 115 23.4 117 2 70-130/30
96-12-8 1,2-Dibromo-3-chloropropane 20 17.7 89 18.1 91 2 70-130/30
106-93-4 1,2-Dibromoethane 20 21.1 106 21.5 108 2 70-130/30
75-71-8 Dichlorodifluoromethane 20 20.3 102 19.4 97 5 60-140/30
541-73-1 m-Dichlorobenzene 20 16.9 85 17.2 86 2 70-130/30
95-50-1 o-Dichlorobenzene 20 17.5 88 17.9 90 2 70-130/30
106-46-7 p-Dichlorobenzene 20 16.9 85 17.0 85 1 70-130/30
75-34-3 1,1-Dichloroethane 20 17.4 87 17.7 89 2 70-130/30
107-06-2 1,2-Dichloroethane 20 20.2 101 20.7 104 2 70-130/30
75-35-4 1,1-Dichloroethylene 20 15.3 77 20.9 105 31* a 70-130/30
156-59-2 cis-1,2-Dichloroethylene 20 18.1 91 18.4 92 2 70-130/30
156-60-5 trans-1,2-Dichloroethylene 20 18.0 90 18.2 91 1 70-130/30
78-87-5 1,2-Dichloropropane 20 17.9 90 18.4 92 3 70-130/30
142-28-9 1,3-Dichloropropane 20 18.9 95 19.3 97 2 70-130/30
594-20-7 2,2-Dichloropropane 20 18.6 93 18.9 95 2 70-130/30
563-58-6 1,1-Dichloropropene 20 17.6 88 17.9 90 2 70-130/30
10061-01-5 cis-1,3-Dichloropropene 20 22.0 110 22.7 114 3 70-130/30
10061-02-6 trans-1,3-Dichloropropene 20 18.7 94 19.4 97 4 70-130/30
108-20-3 Di-Isopropyl Ether 20 17.8 89 18.2 91 2 70-130/30
64-17-5 Ethyl Alcohol 400 353 88 372 93 5 70-130/30
100-41-4 Ethylbenzene 20 17.7 89 18.1 91 2 70-130/30
* = Outside of Control Limits.
33 of 47
LA8757655.2.1
Blank Spike/Blank Spike Duplicate Summary Page 2 of 3
Job Number:LA87576
Account:ATCNCR Atlas
Project:RM #6143-Winston-Salem, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V1Q3221-BS1 1Q01463621.D 1 02/07/23 MB n/a n/a V1Q3221
V1Q3221-BSD1 1Q01463622.D 1 02/07/23 MB n/a n/a V1Q3221
The QC reported here applies to the following samples:Method: SM 6200B
LA87576-1, LA87576-2, LA87576-4
Spike BSP BSP BSD BSD Limits
CAS No.Compound ug/l ug/l %ug/l %RPD Rec/RPD
591-78-6 2-Hexanone 50 51.2 102 53.7 107 5 70-130/30
87-68-3 Hexachlorobutadiene 20 17.0 85 17.3 87 2 70-130/30
98-82-8 Isopropylbenzene 20 18.2 91 18.5 93 2 70-130/30
99-87-6 p-Isopropyltoluene 20 17.8 89 18.2 91 2 70-130/30
74-83-9 Methyl Bromide 20 14.8 74 14.3 72 3 60-140/30
74-87-3 Methyl Chloride 20 15.8 79 15.4 77 3 60-140/30
74-95-3 Methylene Bromide 20 18.9 95 19.3 97 2 70-130/30
75-09-2 Methylene Chloride 20 19.4 97 19.6 98 1 70-130/30
78-93-3 Methyl Ethyl Ketone 50 56.2 112 59.7 119 6 70-130/30
108-10-1 4-Methyl-2-pentanone 50 57.5 115 60.2 120 5 70-130/30
1634-04-4 Methyl Tert Butyl Ether 20 18.9 95 19.3 97 2 70-130/30
91-20-3 Naphthalene 20 20.5 103 21.3 107 4 70-130/30
103-65-1 n-Propylbenzene 20 17.5 88 17.8 89 2 70-130/30
100-42-5 Styrene 20 19.6 98 20.1 101 3 70-130/30
630-20-6 1,1,1,2-Tetrachloroethane 20 21.7 109 22.1 111 2 70-130/30
79-34-5 1,1,2,2-Tetrachloroethane 20 19.0 95 19.5 98 3 70-130/30
127-18-4 Tetrachloroethylene 20 18.2 91 18.6 93 2 70-130/30
108-88-3 Toluene 20 17.9 90 18.5 93 3 70-130/30
87-61-6 1,2,3-Trichlorobenzene 20 18.1 91 18.5 93 2 70-130/30
120-82-1 1,2,4-Trichlorobenzene 20 18.0 90 18.2 91 1 70-130/30
71-55-6 1,1,1-Trichloroethane 20 18.4 92 18.6 93 1 70-130/30
79-00-5 1,1,2-Trichloroethane 20 19.6 98 20.1 101 3 70-130/30
79-01-6 Trichloroethylene 20 19.0 95 19.2 96 1 70-130/30
75-69-4 Trichlorofluoromethane 20 17.5 88 16.4 82 6 60-140/30
96-18-4 1,2,3-Trichloropropane 20 18.8 94 19.6 98 4 70-130/30
95-63-6 1,2,4-Trimethylbenzene 20 17.6 88 17.9 90 2 70-130/30
108-67-8 1,3,5-Trimethylbenzene 20 17.8 89 18.1 91 2 70-130/30
108-05-4 Vinyl Acetate 20 20.2 101 21.6 108 7 70-130/30
75-01-4 Vinyl Chloride 20 17.3 87 16.5 83 5 60-140/30
m,p-Xylene 40 36.1 90 36.9 92 2 70-130/30
95-47-6 o-Xylene 20 17.8 89 18.1 91 2 70-130/30
1330-20-7 Xylene (total)60 53.9 90 55.0 92 2 70-130/30
* = Outside of Control Limits.
34 of 47
LA8757655.2.1
Blank Spike/Blank Spike Duplicate Summary Page 3 of 3
Job Number:LA87576
Account:ATCNCR Atlas
Project:RM #6143-Winston-Salem, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V1Q3221-BS1 1Q01463621.D 1 02/07/23 MB n/a n/a V1Q3221
V1Q3221-BSD1 1Q01463622.D 1 02/07/23 MB n/a n/a V1Q3221
The QC reported here applies to the following samples:Method: SM 6200B
LA87576-1, LA87576-2, LA87576-4
CAS No.Surrogate Recoveries BSP BSD Limits
17060-07-0 1,2-Dichloroethane-D4 89%89%70-130%
2037-26-5 Toluene-D8 98%99%70-130%
460-00-4 4-Bromofluorobenzene 100%100%70-130%
(a) RPD exceeded criteria. However, both recoveries passed criteria and the samples were ND.
* = Outside of Control Limits.
35 of 47
LA8757655.2.1
Blank Spike/Blank Spike Duplicate Summary Page 1 of 3
Job Number:LA87576
Account:ATCNCR Atlas
Project:RM #6143-Winston-Salem, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V1Q3222-BS1 1Q01463645.D 1 02/08/23 MB n/a n/a V1Q3222
V1Q3222-BSD1 1Q01463646.D 1 02/08/23 MB n/a n/a V1Q3222
The QC reported here applies to the following samples:Method: SM 6200B
LA87576-1, LA87576-3
Spike BSP BSP BSD BSD Limits
CAS No.Compound ug/l ug/l %ug/l %RPD Rec/RPD
67-64-1 Acetone 50 51.9 104 48.8 98 6 70-130/30
71-43-2 Benzene 20 17.9 90 18.3 92 2 70-130/30
108-86-1 Bromobenzene 20 18.3 92 18.2 91 1 70-130/30
74-97-5 Bromochloromethane 20 20.7 104 19.6 98 5 70-130/30
75-27-4 Bromodichloromethane 20 20.0 100 20.1 101 0 70-130/30
75-25-2 Bromoform 20 23.7 119 22.8 114 4 70-130/30
104-51-8 n-Butylbenzene 20 18.2 91 18.4 92 1 70-130/30
135-98-8 sec-Butylbenzene 20 17.4 87 17.8 89 2 70-130/30
98-06-6 tert-Butylbenzene 20 17.5 88 17.8 89 2 70-130/30
56-23-5 Carbon Tetrachloride 20 19.1 96 19.9 100 4 70-130/30
108-90-7 Chlorobenzene 20 17.8 89 17.9 90 1 70-130/30
75-00-3 Chloroethane 20 16.9 85 18.2 91 7 60-140/30
67-66-3 Chloroform 20 15.7 79 18.8 94 18 70-130/30
95-49-8 o-Chlorotoluene 20 16.8 84 17.2 86 2 70-130/30
106-43-4 p-Chlorotoluene 20 17.2 86 17.3 87 1 70-130/30
124-48-1 Dibromochloromethane 20 22.5 113 22.2 111 1 70-130/30
96-12-8 1,2-Dibromo-3-chloropropane 20 18.0 90 17.5 88 3 70-130/30
106-93-4 1,2-Dibromoethane 20 21.3 107 20.8 104 2 70-130/30
75-71-8 Dichlorodifluoromethane 20 17.8 89 19.4 97 9 60-140/30
541-73-1 m-Dichlorobenzene 20 16.7 84 16.9 85 1 70-130/30
95-50-1 o-Dichlorobenzene 20 17.3 87 17.4 87 1 70-130/30
106-46-7 p-Dichlorobenzene 20 16.5 83 16.8 84 2 70-130/30
75-34-3 1,1-Dichloroethane 20 17.8 89 18.4 92 3 70-130/30
107-06-2 1,2-Dichloroethane 20 21.3 107 21.0 105 1 70-130/30
75-35-4 1,1-Dichloroethylene 20 20.0 100 23.0 115 14 70-130/30
156-59-2 cis-1,2-Dichloroethylene 20 17.9 90 18.4 92 3 70-130/30
156-60-5 trans-1,2-Dichloroethylene 20 17.7 89 18.3 92 3 70-130/30
78-87-5 1,2-Dichloropropane 20 18.2 91 18.6 93 2 70-130/30
142-28-9 1,3-Dichloropropane 20 19.3 97 19.1 96 1 70-130/30
594-20-7 2,2-Dichloropropane 20 20.2 101 19.9 100 1 70-130/30
563-58-6 1,1-Dichloropropene 20 17.7 89 18.4 92 4 70-130/30
10061-01-5 cis-1,3-Dichloropropene 20 22.5 113 22.6 113 0 70-130/30
10061-02-6 trans-1,3-Dichloropropene 20 19.8 99 19.8 99 0 70-130/30
108-20-3 Di-Isopropyl Ether 20 18.7 94 18.8 94 1 70-130/30
64-17-5 Ethyl Alcohol 400 310 78 307 77 1 70-130/30
100-41-4 Ethylbenzene 20 18.1 91 18.4 92 2 70-130/30
* = Outside of Control Limits.
36 of 47
LA8757655.2.2
Blank Spike/Blank Spike Duplicate Summary Page 2 of 3
Job Number:LA87576
Account:ATCNCR Atlas
Project:RM #6143-Winston-Salem, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V1Q3222-BS1 1Q01463645.D 1 02/08/23 MB n/a n/a V1Q3222
V1Q3222-BSD1 1Q01463646.D 1 02/08/23 MB n/a n/a V1Q3222
The QC reported here applies to the following samples:Method: SM 6200B
LA87576-1, LA87576-3
Spike BSP BSP BSD BSD Limits
CAS No.Compound ug/l ug/l %ug/l %RPD Rec/RPD
591-78-6 2-Hexanone 50 55.3 111 53.3 107 4 70-130/30
87-68-3 Hexachlorobutadiene 20 16.4 82 17.0 85 4 70-130/30
98-82-8 Isopropylbenzene 20 18.5 93 18.8 94 2 70-130/30
99-87-6 p-Isopropyltoluene 20 17.7 89 18.2 91 3 70-130/30
74-83-9 Methyl Bromide 20 12.9 65 14.4 72 11 60-140/30
74-87-3 Methyl Chloride 20 15.9 80 17.1 86 7 60-140/30
74-95-3 Methylene Bromide 20 18.9 95 18.8 94 1 70-130/30
75-09-2 Methylene Chloride 20 19.9 100 20.0 100 1 70-130/30
78-93-3 Methyl Ethyl Ketone 50 59.4 119 52.7 105 12 70-130/30
108-10-1 4-Methyl-2-pentanone 50 60.6 121 58.1 116 4 70-130/30
1634-04-4 Methyl Tert Butyl Ether 20 19.8 99 19.7 99 1 70-130/30
91-20-3 Naphthalene 20 20.4 102 19.9 100 2 70-130/30
103-65-1 n-Propylbenzene 20 17.3 87 17.7 89 2 70-130/30
100-42-5 Styrene 20 19.8 99 19.9 100 1 70-130/30
630-20-6 1,1,1,2-Tetrachloroethane 20 21.4 107 21.5 108 0 70-130/30
79-34-5 1,1,2,2-Tetrachloroethane 20 19.2 96 18.8 94 2 70-130/30
127-18-4 Tetrachloroethylene 20 19.0 95 20.0 100 5 70-130/30
108-88-3 Toluene 20 18.3 92 18.7 94 2 70-130/30
87-61-6 1,2,3-Trichlorobenzene 20 17.7 89 17.7 89 0 70-130/30
120-82-1 1,2,4-Trichlorobenzene 20 17.3 87 17.4 87 1 70-130/30
71-55-6 1,1,1-Trichloroethane 20 18.6 93 19.3 97 4 70-130/30
79-00-5 1,1,2-Trichloroethane 20 19.8 99 19.6 98 1 70-130/30
79-01-6 Trichloroethylene 20 18.8 94 19.2 96 2 70-130/30
75-69-4 Trichlorofluoromethane 20 16.9 85 18.1 91 7 60-140/30
96-18-4 1,2,3-Trichloropropane 20 20.1 101 19.5 98 3 70-130/30
95-63-6 1,2,4-Trimethylbenzene 20 17.6 88 18.1 91 3 70-130/30
108-67-8 1,3,5-Trimethylbenzene 20 17.9 90 18.2 91 2 70-130/30
108-05-4 Vinyl Acetate 20 22.2 111 21.7 109 2 70-130/30
75-01-4 Vinyl Chloride 20 18.3 92 19.5 98 6 60-140/30
m,p-Xylene 40 37.1 93 37.9 95 2 70-130/30
95-47-6 o-Xylene 20 18.0 90 18.4 92 2 70-130/30
1330-20-7 Xylene (total)60 55.1 92 56.3 94 2 70-130/30
* = Outside of Control Limits.
37 of 47
LA8757655.2.2
Blank Spike/Blank Spike Duplicate Summary Page 3 of 3
Job Number:LA87576
Account:ATCNCR Atlas
Project:RM #6143-Winston-Salem, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V1Q3222-BS1 1Q01463645.D 1 02/08/23 MB n/a n/a V1Q3222
V1Q3222-BSD1 1Q01463646.D 1 02/08/23 MB n/a n/a V1Q3222
The QC reported here applies to the following samples:Method: SM 6200B
LA87576-1, LA87576-3
CAS No.Surrogate Recoveries BSP BSD Limits
17060-07-0 1,2-Dichloroethane-D4 94%92%70-130%
2037-26-5 Toluene-D8 99%97%70-130%
460-00-4 4-Bromofluorobenzene 102%101%70-130%
* = Outside of Control Limits.
38 of 47
LA8757655.2.2
Matrix Spike/Matrix Spike Duplicate Summary Page 1 of 3
Job Number:LA87576
Account:ATCNCR Atlas
Project:RM #6143-Winston-Salem, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
LA87576-3MS 1Q01463652.D 1000 02/08/23 MB n/a n/a V1Q3222
LA87576-3MSD 1Q01463653.D 1000 02/08/23 MB n/a n/a V1Q3222
LA87576-3 1Q01463651.D 1 02/08/23 MB n/a n/a V1Q3222
The QC reported here applies to the following samples:Method: SM 6200B
LA87576-1, LA87576-3
LA87576-3 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 ND 50000 41100 82 50000 40200 80 2 70-130/20
71-43-2 Benzene ND 20000 18800 94 20000 18600 93 1 70-130/20
108-86-1 Bromobenzene ND 20000 18900 95 20000 18700 94 1 70-130/20
74-97-5 Bromochloromethane ND 20000 20000 100 20000 19500 98 3 70-130/20
75-27-4 Bromodichloromethane ND 20000 20900 105 20000 20500 103 2 70-130/20
75-25-2 Bromoform ND 20000 24400 122 20000 23900 120 2 70-130/20
104-51-8 n-Butylbenzene ND 20000 15300 77 20000 15400 77 1 70-130/20
135-98-8 sec-Butylbenzene ND 20000 17500 88 20000 17400 87 1 70-130/20
98-06-6 tert-Butylbenzene ND 20000 16700 84 20000 16700 84 0 70-130/20
56-23-5 Carbon Tetrachloride ND 20000 19800 99 20000 19700 99 1 70-130/20
108-90-7 Chlorobenzene ND 20000 18400 92 20000 18100 91 2 70-130/20
75-00-3 Chloroethane ND 20000 20400 102 20000 18800 94 8 60-140/20
67-66-3 Chloroform ND 20000 19800 99 20000 19500 98 2 70-130/20
95-49-8 o-Chlorotoluene ND 20000 17000 85 20000 17100 86 1 70-130/20
106-43-4 p-Chlorotoluene ND 20000 17200 86 20000 17300 87 1 70-130/20
124-48-1 Dibromochloromethane ND 20000 23200 116 20000 22900 115 1 70-130/20
96-12-8 1,2-Dibromo-3-chloropropane ND 20000 17300 87 20000 17700 89 2 70-130/20
106-93-4 1,2-Dibromoethane ND 20000 21200 106 20000 21400 107 1 70-130/20
75-71-8 Dichlorodifluoromethane ND 20000 18700 94 20000 18900 95 1 60-140/20
541-73-1 m-Dichlorobenzene ND 20000 16900 85 20000 16700 84 1 70-130/20
95-50-1 o-Dichlorobenzene ND 20000 17600 88 20000 17500 88 1 70-130/20
106-46-7 p-Dichlorobenzene ND 20000 16400 82 20000 16500 83 1 70-130/20
75-34-3 1,1-Dichloroethane ND 20000 18400 92 20000 18100 91 2 70-130/20
107-06-2 1,2-Dichloroethane ND 20000 21800 109 20000 21400 107 2 70-130/20
75-35-4 1,1-Dichloroethylene ND 20000 17500 88 20000 18100 91 3 70-130/20
156-59-2 cis-1,2-Dichloroethylene ND 20000 18300 92 20000 18100 91 1 70-130/20
156-60-5 trans-1,2-Dichloroethylene ND 20000 17400 87 20000 17500 88 1 70-130/20
78-87-5 1,2-Dichloropropane ND 20000 19000 95 20000 18800 94 1 70-130/20
142-28-9 1,3-Dichloropropane ND 20000 19600 98 20000 19400 97 1 70-130/20
594-20-7 2,2-Dichloropropane ND 20000 12200 61* a 20000 12100 61* a 1 70-130/20
563-58-6 1,1-Dichloropropene ND 20000 18000 90 20000 17600 88 2 70-130/20
10061-01-5 cis-1,3-Dichloropropene ND 20000 21000 105 20000 20900 105 0 70-130/20
10061-02-6 trans-1,3-Dichloropropene ND 20000 18100 91 20000 18200 91 1 70-130/20
108-20-3 Di-Isopropyl Ether ND 20000 18600 93 20000 18200 91 2 70-130/20
64-17-5 Ethyl Alcohol ND 400000 288000 72 400000 277000 69* a 4 70-130/20
100-41-4 Ethylbenzene ND 20000 18900 95 20000 18500 93 2 70-130/20
* = Outside of Control Limits.
39 of 47
LA8757655.3.1
Matrix Spike/Matrix Spike Duplicate Summary Page 2 of 3
Job Number:LA87576
Account:ATCNCR Atlas
Project:RM #6143-Winston-Salem, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
LA87576-3MS 1Q01463652.D 1000 02/08/23 MB n/a n/a V1Q3222
LA87576-3MSD 1Q01463653.D 1000 02/08/23 MB n/a n/a V1Q3222
LA87576-3 1Q01463651.D 1 02/08/23 MB n/a n/a V1Q3222
The QC reported here applies to the following samples:Method: SM 6200B
LA87576-1, LA87576-3
LA87576-3 Spike MS MS Spike MSD MSD Limits
CAS No.Compound ug/l Q ug/l ug/l %ug/l ug/l %RPD Rec/RPD
591-78-6 2-Hexanone ND 50000 51900 104 50000 52900 106 2 70-130/20
87-68-3 Hexachlorobutadiene ND 20000 15400 77 20000 15600 78 1 70-130/20
98-82-8 Isopropylbenzene ND 20000 19300 97 20000 19000 95 2 70-130/20
99-87-6 p-Isopropyltoluene ND 20000 17800 89 20000 17700 89 1 70-130/20
74-83-9 Methyl Bromide ND 20000 16900 85 20000 17400 87 3 60-140/20
74-87-3 Methyl Chloride ND 20000 16900 85 20000 17400 87 3 60-140/20
74-95-3 Methylene Bromide ND 20000 19500 98 20000 19400 97 1 70-130/20
75-09-2 Methylene Chloride ND 20000 19600 98 20000 19600 98 0 70-130/20
78-93-3 Methyl Ethyl Ketone ND 50000 47600 95 50000 49400 99 4 70-130/20
108-10-1 4-Methyl-2-pentanone ND 50000 58200 116 50000 58000 116 0 70-130/20
1634-04-4 Methyl Tert Butyl Ether ND 20000 18900 95 20000 19000 95 1 70-130/20
91-20-3 Naphthalene ND 20000 19900 100 20000 20300 102 2 70-130/20
103-65-1 n-Propylbenzene ND 20000 17400 87 20000 17300 87 1 70-130/20
100-42-5 Styrene ND 20000 20600 103 20000 20300 102 1 70-130/20
630-20-6 1,1,1,2-Tetrachloroethane ND 20000 22400 112 20000 22000 110 2 70-130/20
79-34-5 1,1,2,2-Tetrachloroethane ND 20000 18400 92 20000 18600 93 1 70-130/20
127-18-4 Tetrachloroethylene ND 20000 25400 127 20000 25000 125 2 70-130/20
108-88-3 Toluene ND 20000 18900 95 20000 18700 94 1 70-130/20
87-61-6 1,2,3-Trichlorobenzene ND 20000 17100 86 20000 17500 88 2 70-130/20
120-82-1 1,2,4-Trichlorobenzene ND 20000 16700 84 20000 16900 85 1 70-130/20
71-55-6 1,1,1-Trichloroethane ND 20000 19400 97 20000 19100 96 2 70-130/20
79-00-5 1,1,2-Trichloroethane ND 20000 20200 101 20000 19800 99 2 70-130/20
79-01-6 Trichloroethylene ND 20000 19700 99 20000 19300 97 2 70-130/20
75-69-4 Trichlorofluoromethane ND 20000 18600 93 20000 17700 89 5 60-140/20
96-18-4 1,2,3-Trichloropropane ND 20000 17700 89 20000 17600 88 1 70-130/20
95-63-6 1,2,4-Trimethylbenzene ND 20000 17800 89 20000 17700 89 1 70-130/20
108-67-8 1,3,5-Trimethylbenzene ND 20000 18000 90 20000 18000 90 0 70-130/20
108-05-4 Vinyl Acetate ND 20000 17100 86 20000 17400 87 2 70-130/20
75-01-4 Vinyl Chloride ND 20000 17800 89 20000 17000 85 5 60-140/20
m,p-Xylene ND 40000 38500 96 40000 37800 95 2 70-130/20
95-47-6 o-Xylene ND 20000 18900 95 20000 18600 93 2 70-130/20
1330-20-7 Xylene (total)ND 60000 57500 96 60000 56300 94 2 70-130/20
* = Outside of Control Limits.
40 of 47
LA8757655.3.1
Matrix Spike/Matrix Spike Duplicate Summary Page 3 of 3
Job Number:LA87576
Account:ATCNCR Atlas
Project:RM #6143-Winston-Salem, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
LA87576-3MS 1Q01463652.D 1000 02/08/23 MB n/a n/a V1Q3222
LA87576-3MSD 1Q01463653.D 1000 02/08/23 MB n/a n/a V1Q3222
LA87576-3 1Q01463651.D 1 02/08/23 MB n/a n/a V1Q3222
The QC reported here applies to the following samples:Method: SM 6200B
LA87576-1, LA87576-3
CAS No.Surrogate Recoveries MS MSD LA87576-3 Limits
17060-07-0 1,2-Dichloroethane-D4 91%92%100%70-130%
2037-26-5 Toluene-D8 100%99%105%70-130%
460-00-4 4-Bromofluorobenzene 103%102%105%70-130%
(a) Outside control limits due to matrix interference. Blank Spike meets acceptance criteria.
* = Outside of Control Limits.
41 of 47
LA8757655.3.1
Matrix Spike/Matrix Spike Duplicate Summary Page 1 of 3
Job Number:LA87576
Account:ATCNCR Atlas
Project:RM #6143-Winston-Salem, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
LA87631-1MS 1Q01463654.D 5 02/08/23 MB n/a n/a V1Q3221
LA87631-1MSD 1Q01463655.D 5 02/08/23 MB n/a n/a V1Q3221
LA87631-1 1Q01463633.D 1 02/07/23 MB n/a n/a V1Q3221
The QC reported here applies to the following samples:Method: SM 6200B
LA87576-1, LA87576-2, LA87576-4
LA87631-1 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 250 148 59* a 250 148 59* a 0 70-130/20
71-43-2 Benzene ND 100 93.6 94 100 93.5 94 0 70-130/20
108-86-1 Bromobenzene ND 100 94.3 94 100 95.4 95 1 70-130/20
74-97-5 Bromochloromethane ND 100 96.5 97 100 96.5 97 0 70-130/20
75-27-4 Bromodichloromethane ND 100 103 103 100 103 103 0 70-130/20
75-25-2 Bromoform ND 100 120 120 100 121 121 1 70-130/20
104-51-8 n-Butylbenzene ND 100 94.9 95 100 95.0 95 0 70-130/20
135-98-8 sec-Butylbenzene ND 100 91.6 92 100 91.5 92 0 70-130/20
98-06-6 tert-Butylbenzene ND 100 94.3 94 100 94.6 95 0 70-130/20
56-23-5 Carbon Tetrachloride ND 100 102 102 100 101 101 1 70-130/20
108-90-7 Chlorobenzene ND 100 91.5 92 100 92.7 93 1 70-130/20
75-00-3 Chloroethane ND 100 85.4 85 100 82.4 82 4 60-140/20
67-66-3 Chloroform ND 100 90.8 91 100 90.1 90 1 70-130/20
95-49-8 o-Chlorotoluene ND 100 88.5 89 100 89.2 89 1 70-130/20
106-43-4 p-Chlorotoluene ND 100 90.2 90 100 90.5 91 0 70-130/20
124-48-1 Dibromochloromethane ND 100 114 114 100 117 117 3 70-130/20
96-12-8 1,2-Dibromo-3-chloropropane ND 100 90.4 90 100 93.5 94 3 70-130/20
106-93-4 1,2-Dibromoethane ND 100 108 108 100 109 109 1 70-130/20
75-71-8 Dichlorodifluoromethane ND 100 94.8 95 100 93.4 93 1 60-140/20
541-73-1 m-Dichlorobenzene ND 100 86.9 87 100 86.9 87 0 70-130/20
95-50-1 o-Dichlorobenzene ND 100 89.8 90 100 90.5 91 1 70-130/20
106-46-7 p-Dichlorobenzene ND 100 86.2 86 100 86.7 87 1 70-130/20
75-34-3 1,1-Dichloroethane ND 100 90.9 91 100 91.2 91 0 70-130/20
107-06-2 1,2-Dichloroethane ND 100 107 107 100 107 107 0 70-130/20
75-35-4 1,1-Dichloroethylene ND 100 83.9 84 100 92.9 93 10 70-130/20
156-59-2 cis-1,2-Dichloroethylene ND 100 92.8 93 100 93.0 93 0 70-130/20
156-60-5 trans-1,2-Dichloroethylene ND 100 92.2 92 100 91.7 92 1 70-130/20
78-87-5 1,2-Dichloropropane ND 100 93.7 94 100 93.9 94 0 70-130/20
142-28-9 1,3-Dichloropropane ND 100 98.1 98 100 99.3 99 1 70-130/20
594-20-7 2,2-Dichloropropane ND 100 102 102 100 101 101 1 70-130/20
563-58-6 1,1-Dichloropropene ND 100 93.4 93 100 91.7 92 2 70-130/20
10061-01-5 cis-1,3-Dichloropropene ND 100 114 114 100 115 115 1 70-130/20
10061-02-6 trans-1,3-Dichloropropene ND 100 98.7 99 100 100 100 1 70-130/20
108-20-3 Di-Isopropyl Ether ND 100 92.1 92 100 92.6 93 1 70-130/20
64-17-5 Ethyl Alcohol ND 2000 1320 66* a 2000 1380 69* a 4 70-130/20
100-41-4 Ethylbenzene ND 100 93.8 94 100 94.4 94 1 70-130/20
* = Outside of Control Limits.
42 of 47
LA8757655.3.2
Matrix Spike/Matrix Spike Duplicate Summary Page 2 of 3
Job Number:LA87576
Account:ATCNCR Atlas
Project:RM #6143-Winston-Salem, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
LA87631-1MS 1Q01463654.D 5 02/08/23 MB n/a n/a V1Q3221
LA87631-1MSD 1Q01463655.D 5 02/08/23 MB n/a n/a V1Q3221
LA87631-1 1Q01463633.D 1 02/07/23 MB n/a n/a V1Q3221
The QC reported here applies to the following samples:Method: SM 6200B
LA87576-1, LA87576-2, LA87576-4
LA87631-1 Spike MS MS Spike MSD MSD Limits
CAS No.Compound ug/l Q ug/l ug/l %ug/l ug/l %RPD Rec/RPD
591-78-6 2-Hexanone ND 250 265 106 250 270 108 2 70-130/20
87-68-3 Hexachlorobutadiene ND 100 88.7 89 100 90.1 90 2 70-130/20
98-82-8 Isopropylbenzene ND 100 96.5 97 100 96.7 97 0 70-130/20
99-87-6 p-Isopropyltoluene ND 100 94.4 94 100 94.6 95 0 70-130/20
74-83-9 Methyl Bromide ND 100 76.6 77 100 73.6 74 4 60-140/20
74-87-3 Methyl Chloride ND 100 84.9 85 100 84.8 85 0 60-140/20
74-95-3 Methylene Bromide ND 100 97.6 98 100 97.8 98 0 70-130/20
75-09-2 Methylene Chloride ND 100 100 100 100 99.8 100 0 70-130/20
78-93-3 Methyl Ethyl Ketone ND 250 241 96 250 242 97 0 70-130/20
108-10-1 4-Methyl-2-pentanone ND 250 294 118 250 295 118 0 70-130/20
1634-04-4 Methyl Tert Butyl Ether ND 100 98.1 98 100 98.2 98 0 70-130/20
91-20-3 Naphthalene ND 100 104 104 100 105 105 1 70-130/20
103-65-1 n-Propylbenzene ND 100 91.9 92 100 91.8 92 0 70-130/20
100-42-5 Styrene ND 100 102 102 100 103 103 1 70-130/20
630-20-6 1,1,1,2-Tetrachloroethane ND 100 110 110 100 113 113 3 70-130/20
79-34-5 1,1,2,2-Tetrachloroethane ND 100 98.3 98 100 98.8 99 1 70-130/20
127-18-4 Tetrachloroethylene ND 100 81.9 82 100 82.1 82 0 70-130/20
108-88-3 Toluene ND 100 94.8 95 100 95.2 95 0 70-130/20
87-61-6 1,2,3-Trichlorobenzene ND 100 90.8 91 100 91.0 91 0 70-130/20
120-82-1 1,2,4-Trichlorobenzene ND 100 89.7 90 100 90.7 91 1 70-130/20
71-55-6 1,1,1-Trichloroethane ND 100 97.4 97 100 96.7 97 1 70-130/20
79-00-5 1,1,2-Trichloroethane ND 100 100 100 100 102 102 2 70-130/20
79-01-6 Trichloroethylene ND 100 97.2 97 100 98.3 98 1 70-130/20
75-69-4 Trichlorofluoromethane ND 100 86.2 86 100 83.9 84 3 60-140/20
96-18-4 1,2,3-Trichloropropane ND 100 99.6 100 100 101 101 1 70-130/20
95-63-6 1,2,4-Trimethylbenzene ND 100 92.5 93 100 92.3 92 0 70-130/20
108-67-8 1,3,5-Trimethylbenzene ND 100 94.1 94 100 94.3 94 0 70-130/20
108-05-4 Vinyl Acetate ND 100 110 110 100 111 111 1 70-130/20
75-01-4 Vinyl Chloride ND 100 84.7 85 100 83.6 84 1 60-140/20
m,p-Xylene ND 200 193 97 200 193 97 0 70-130/20
95-47-6 o-Xylene ND 100 93.6 94 100 94.4 94 1 70-130/20
1330-20-7 Xylene (total)ND 300 286 95 300 287 96 0 70-130/20
* = Outside of Control Limits.
43 of 47
LA8757655.3.2
Matrix Spike/Matrix Spike Duplicate Summary Page 3 of 3
Job Number:LA87576
Account:ATCNCR Atlas
Project:RM #6143-Winston-Salem, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
LA87631-1MS 1Q01463654.D 5 02/08/23 MB n/a n/a V1Q3221
LA87631-1MSD 1Q01463655.D 5 02/08/23 MB n/a n/a V1Q3221
LA87631-1 1Q01463633.D 1 02/07/23 MB n/a n/a V1Q3221
The QC reported here applies to the following samples:Method: SM 6200B
LA87576-1, LA87576-2, LA87576-4
CAS No.Surrogate Recoveries MS MSD LA87631-1 Limits
17060-07-0 1,2-Dichloroethane-D4 93%89%107%70-130%
2037-26-5 Toluene-D8 99%99%106%70-130%
460-00-4 4-Bromofluorobenzene 101%102%104%70-130%
(a) Outside control limits due to matrix interference. Blank Spike meets acceptance criteria.
* = Outside of Control Limits.
44 of 47
LA8757655.3.2
SGS North America Inc.
GC Volatiles
QC Data Summaries
Includes the following where applicable:
• Method Blank Summaries
• Blank Spike Summaries
• Matrix Spike and Duplicate Summaries
Scott, LA
Section 6
45 of 47
LA875766
Method Blank Summary Page 1 of 1
Job Number:LA87576
Account:ATCNCR Atlas
Project:RM #6143-Winston-Salem, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
OP22195-MB LI137682.D 1 02/09/23 JT 02/09/23 OP22195 GLI1228
The QC reported here applies to the following samples:Method: EPA 504.1
LA87576-1, LA87576-2, LA87576-3, LA87576-4
CAS No.Compound Result RL MDL Units Q
106-93-4 1,2-Dibromoethane ND 0.020 0.0038 ug/l
CAS No.Surrogate Recoveries Limits
348-51-6 1-Chloro-2-fluorobenzene 101%70-130%
46 of 47
LA8757666.1.1
Blank Spike/Blank Spike Duplicate Summary Page 1 of 1
Job Number:LA87576
Account:ATCNCR Atlas
Project:RM #6143-Winston-Salem, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
OP22195-BS LI137683.D 1 02/09/23 JT 02/09/23 OP22195 GLI1228
OP22195-BSD LI137684.D 1 02/09/23 JT 02/09/23 OP22195 GLI1228
The QC reported here applies to the following samples:Method: EPA 504.1
LA87576-1, LA87576-2, LA87576-3, LA87576-4
Spike BSP BSP BSD BSD Limits
CAS No.Compound ug/l ug/l %ug/l %RPD Rec/RPD
106-93-4 1,2-Dibromoethane 0.251 0.27 107 0.31 123 14 70-130/20
CAS No.Surrogate Recoveries BSP BSD Limits
348-51-6 1-Chloro-2-fluorobenzene 95%111%70-130%
* = Outside of Control Limits.
47 of 47
LA8757666.2.1