WS-5839_20966_CA_CAP_20230214_CAPR

EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC 
www.excelengr.com
Excel Civil & Environmental Associates, PLLC
625 Huntsman Court
Gastonia, North Carolina 28054
NC License No. P-0129
Telephone: [phone]
Facsimile: [phone]
Internet: www.excelengr.com
February 14, 2023
Ms. Christina Schroeter
NCDEQ / DWM / UST Section
Winston-Salem Regional Office
450 West Hanes Mill Road, Suite 300
Winston-Salem, North Carolina 27105
Re: Corrective Action Performance Report
(Former) Servco No. 01711
850 North Liberty Street
Winston-Salem, North Carolina
Risk Classification: Intermediate
WS-5839_20966_CA_20230214
Land Use: INDUSTRIAL/COMMERCIAL
EXCEL Project No. 24090
Dear Ms. Schroeter:
On behalf of Service Distributing Company, Incorporated (Servco), Excel Civil &
Environmental Associates, PLLC (Excel) is pleased to submit a copy of this Monitoring
Report for your approval.
If you have any questions, please do not hesitate to contact me at 704.853.0800.
Sincerely yours,
EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC
Aaron C. Long, P.E.
Project Engineer
p.c. Robert Gresham – Servco, Albermarle, NC
EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC 
www.excelengr.com

CORRECTIVE ACTION PERFORMANCE REPORT

(FORMER) SERVCO NO. 01711
850 NORTH LIBERTY STREET
WINSTON-SALEM, FORSYTH COUNTY, NORTH CAROLINA

WS-5839_20966_CA_20230214
EXCEL PROJECT NO. 24090
Latitude = 31.1048° / Longitude = 80.2434°

SOURCE OF RELEASE:
Former UST System – Amount Unknown

DATE SUBMITTED:
February 14, 2023

PREPARED FOR:
Service Distributing Company, Incorporated
Responsible Party
Post Office Box 310
Albemarle, North Carolina 28001
Attn: Robert Gresham

PREPARED BY:
Excel Civil & Environmental Associates, PLLC
Post Office Box 6172
Gastonia, North Carolina 28056
Phone [phone]
NC License No. P-0129

www.excelengr.com

Aaron C. Long, P.E.
Principal Engineer
Corrective Action Performance Report February 14, 2023
(Former) Servco No. 01711 Incident No. 20966
Winston-Salem, North Carolina Excel No. 24090

EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC 
www.excelengr.com

TABLE OF CONTENTS

SECTION NO. PAGE NO.

TABLE OF CONTENTS .......................................................................................................... i

1.0 EXECUTIVE SUMMARY ............................................................................................. 2

2.0 SITE HISTORY ......................................................................................................... 2

3.0 CURRENT ASSESSMENT INFORMATION ...................................................................... 4

4.0 FREE PRODUCT REMOVAL ....................................................................................... 5

5.0 PLUME STABILITY EVALUATION .............................................................................. 5
6.0 CONCLUSIONS & RECOMMENDATIONS ..................................................................... 6

7.0 SUMMARY OF FIELD ACTIVITIES ................................................................................ 8

LIST OF TABLES
TABLE 1 – MONITOR WELL CONSTRUCTION & LIQUID LEVEL DATA
TABLE 2 – SUMMARY OF CURRENT GROUNDWATER ANALYTICAL DATA
TABLE 3 – SUMMARY OF HISTORICAL GROUNDWATER ANALYTICAL DATA
TABLE 4 – FIELD PARAMETER MEASUREMENTS

LIST OF FIGURES
FIGURE 1 – SITE VICINITY MAP
FIGURE 2 – SITE PLAN
FIGURE 3 – GROUNDWATER CONTOUR MAP
FIGURE 4 – APPROXIMATE LNAPL EXTENT MAP
FIGURE 5 – GROUNDWATER CONSTITUENTS MAP
APPENDICES
APPENDIX A – MANN-KENDALL GRAPHS
APPENDIX B – LABORATORY REPORTS & CHAIN OF CUSTODY FORMS
APPENDIX C – SUPPLEMENTAL SITE HISTORY TABLES
APPENDIX D – MAINTENANCE FORMS

Corrective Action Performance Report February 14, 2023
(Former) Servco No. 01711 Incident No. 20966
Winston-Salem, North Carolina Excel No. 24090

EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC 
www.excelengr.com

SITE INFORMATION
PRIMARY CONSULTANT: Excel Civil & Environmental Associates, PLLC
PROJECT MANAGER: Aaron C. Long
SITE CONTACT: Robert Gresham
SITE HISTORY: In May 1999, seven steel regulated USTs were
removed from the site (Figure 1, Appendix A).
Samples collected during closure activities by
Wallace-Lee Consultants, LLC (WLC) revealed
elevated levels of hydrocarbons. An LSA Report was
completed by WLC in April 2000 with an LSA
Addendum completed by WLC in December 2000,
which concluded that groundwater at the site
contained constituents levels exceeding both NCAC
2L standards and GCLs. During LSA activities
conducted by WLC, free phase LNAPL was
discovered at the site in monitoring well MW-2. Free
product recovery efforts reportedly began in February
2000 by monthly site visits for liquid level gauging
and hand bailing.
To date, eight Aggressive Fluid Vapor Recovery
(AFVR) and two 100-hour Mobile Multi-Phase
Extraction (MMPE) events have previously been
conducted at the site by WLC. A vacuum enhanced
free product recovery system was installed in 2015.
GENERAL GEOLOGY: The subject site is located in the Milton Belts of the
Inner Piedmont Geologic Physiographic Province. The
1985 USGS Geologic Map of North Carolina indicates
that rock in this area is commonly characterized by
inequigranular and megacrystic biotite gneiss and
schist.
REGULATORY INTERACTION
AGENCY: NCDEQ, WSRO, DWM, UST Section
AGENCY CONTACT: Christina Schroeter
SITE ACTIVITIES: Monthly O&M site visits, free product recovery checks
and semiannual groundwater sampling of select wells
RISK ASSESSMENT
SENSITIVE RECEPTORS: Underground utilities on-site and within R/Ws of North
Liberty Street and Chestnut Street; adjacent museum.
CLOSEST POTABLE WELL: Water supply wells were not identified within 1,500
feet of the site.
MONITORING
LIQUID LEVEL GAUGING FREQUENCY: As requested
GROUNDWATER SAMPLING METHOD: As requested

Corrective Action Performance Report February 14, 2023
(Former) Servco No. 01711 Incident No. 20966
Winston-Salem, North Carolina Excel No. 24090

EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC 
www.excelengr.com

EXECUTIVE SUMMARY

The (Former) Servco No. 01711 facility is located at 850 North Liberty Street in Winston-Salem,
Forsyth County, North Carolina. As proposed in the revised Corrective Action Plan completed
by Excel dated March 23, 2013, the onsite remediation system was placed into operation in
January of 2015. The vacuum enhanced free product recovery system is comprised of two
vapor extraction wells and two free product skimmer pumps. During a site visit on January 7,
2021, Excel personnel were requested to leave the property during the system evaluation.
Operation of the remediation system did not occur between 2017 and August 2021, due to site
accessibility issues stemming from the property owner. Excel returned to the property on
September 15, 2021, and restarted the vacuum enhanced free product recovery system and
completed the groundwater sampling event.

LNAPL was measured in MW-2 during the December 2022 sampling event at a thickness of
0.06 feet. This is a decrease from the initial thickness of 0.44 feet measured in April of 2015. No
LNAPL was observed in MW-4 during the reporting period. Due to the presence of free product
above the screen interval, Excel mobilized to the site on September 17, 2019 and installed
Monitor Well MW-2R and MW-4R. No free product was measured in MW-2R or MW-4R during
the December 2022 sampling event (refer to Table 1 and Figure 4). Based upon a review of
the current analytical data, the estimated size of the LNAPL is approximately 75 square feet,
primarily located to the south of the former Servco building. The goal of the remediation system
is to eliminate free product utilizing vacuum enhanced pneumatic skimmers within the source
area. The stated milestone of removing free product has not yet been completed and has been
delayed due to property accessibility issues caused by the current property owner.

Based upon a review of the current analytical data from December 2022 sampling event, the
estimated size of the area of benzene exceeding GCL Standards is approximately 1,625 square
feet. The plume of MTBE contaminants exceeding GCL Standards is approximately 2,700
square feet. The plume is primarily located on the subject property and spanning beneath the
former Servco building south to the former UST tank pit. The remaining constituents are a
minor portion of the benzene and MTBE plumes. Some seasonal fluctuations were observed in
the groundwater quality data from select wells.

Results of past receptor surveys completed by Excel during assessment activities indicate that
supply wells were not identified within 1,500 feet of the property. Additionally, according to the
USGS Topographical Map no surface water bodies are located within 1,500 feet of the source
area.

SITE HISTORY

The (former) Servco No. 01711 facility is located at 850 North Liberty Street within the city of
Winston-Salem, Forsyth County, North Carolina (refer to Figure 1). A site map of the facility
detailing former structures and monitoring well locations is provided as Figure 2. Various
assessment activities have been conducted at the (former) Servco No. 01711 facility following
UST Closure Assessment activities conducted by Service Distributing Company, Incorporated
(Servco) in August 1999 completed by Wallace-Lee Consultants, LLC (WLC) of Wilmington,
North Carolina. During the assessment activities, seven regulated UST’s were removed as part
of one excavation during the closure activities. Following removal of the USTs, reportedly no
additional soils were excavated with excavated soils returned to the UST basin. A total of 32 soil
Corrective Action Performance Report February 14, 2023
(Former) Servco No. 01711 Incident No. 20966
Winston-Salem, North Carolina Excel No. 24090

EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC 
www.excelengr.com

samples were collected from the UST basins, beneath the product lines and dispenser islands
and analyzed for Total Petroleum Hydrocarbons (TPH) by EPA Methods 5030 and 3550
(Gasoline and Diesel Range Organics, respectively). Based on review of the report submitted to
the NCDEQ on August 17, 1999, analytical results revealed elevated levels of petroleum
hydrocarbons in multiple soil samples collected from beneath the UST system.

At the request of the North Carolina Department of Environmental Quality (NCDEQ), Winston-
Salem Regional Office (WsRO), Division of Waste Management, UST Section, an LSA was
completed for the subject property. Servco contracted WLC to complete the LSA, which
included the installation of five Type II monitoring wells, a potable well survey, soil and
groundwater sampling with associated laboratory analysis and the completion of the LSA report.
The soil samples collected at the location of MW-1 were found to be above the Soil-to-Water
Maximum Soil Contaminant Concentrations (MSCC) for various constituents as detailed in the
January 2, 1998 Groundwater Section Guidelines as amended. None of the samples collected
revealed hydrocarbon levels above applicable Industrial/Commercial MSCCs. The laboratory
results of the groundwater samples collected from MW-1, MW-3 and MW-4 were found to
exceed Gross Contamination Levels (GCLs) for benzene as detailed in the January 2, 1998
Groundwater Section Guidelines as amended. During the LSA activities, free product was
encountered in monitoring well MW-2 with a measured thickness of approximately 2.64-feet.

To date, Excel and others have conducted multiple free product recovery events incorporating
both aggressive and passive techniques since February 2000. Eight Aggressive Fluid-Vapor
Recovery (AFVR) events were conducted by WLC reportedly yielding a collective approximate
315-gallons of product. In addition, WLC conducted two 100-hour Mobile Multi-Phase Extraction
(MMPE) events and Excel completed one 100-hour MMPE event recovering a total of 830-
gallons of product/water mixture at the location of MW-2. At the request of the NCDEQ, a Free
Product Recovery Specification Report was completed by Excel on April 15, 2010. Activities
included the installation of two additional monitoring wells MW-6 and MW-7 and the completion
of a free product evaluation at the location of MW-2. Results of the field evaluation revealed no
free product in the newly installed monitoring wells and that the true free product thickness at
MW-2 was measured at 0.04-feet with an expected recovery rate of 0.4-gallons per hour, Excel
recommended the implementation of a free product recovery system at the site.

As directed by the NCDEQ, one additional downgradient monitoring well (MW-13) and two
vapor extraction wells (SVE-1 and SVE-2) were installed on November 24, 2014. Additionally,
MW-2R and MW-3R were installed on September 17, 2019, due to the presence of free product
above the well screen in MW-2 and MW-3.

The onsite remediation system, utilizing vacuum enhanced free product recovery was placed
into operation in January of 2015. The soil vapor extraction system is comprised of two vapor
extraction wells. Excel attempted to restart the SVE system during the September 2021 site visit
and found the vacuum blower to be locked up.

Site access was denied to ECEA by the property owner in June of 2016 and ECEA was not
granted access to return to the property until March of 2017. Site access was granted to install
replacement wells in September 2019 and denied until January of 2021. During the January
2021 site visit Excel was requested to leave by the current property owner during the system
Corrective Action Performance Report February 14, 2023
(Former) Servco No. 01711 Incident No. 20966
Winston-Salem, North Carolina Excel No. 24090

EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC 
www.excelengr.com

evaluation. Excel returned to the property in September 2021 and restarted the vacuum
enhanced free product recovery system and completed the groundwater sampling event.
During the interim, the free product recovery system maintenance could not be completed. The
lack of site access has delayed site cleanup activities by the responsible party.

Cleanup levels (soil) for the site would be the lesser of the Industrial/Commercial Maximum Soil
Contaminant Concentrations (MSCCs) or the Soil-to-Water Maximum Soil Contaminant
Concentrations (MSCCs). The CAP proposed the restoration of groundwater quality to a site-
specific action levels approximating Gross Contamination Levels (GCLs) for the applicable
standards developed for this site. Following achievement of the site-specific action level, the site
risk classification can be reduced to “Low” and active groundwater remediation can be
suspended. Once risk reduction has occurred, the applicable soil cleanup levels for the site
would be Industrial/Commercial.

CURRENT ASSESSMENT INFORMATION

 Groundwater quality samples were collected from ten monitor wells on December 29, 2022,
and laboratory analyzed for full range volatile organic compounds (VOCs) by EPA Method
6200B. It is Excel’s standard operating procedure not to gauge monitoring wells with an oil-
water interface probe prior to sampling if said well has not historically shown free product.
Static water levels were collected with a decontaminated water level indicator at locations
where free product has not previously been encountered.

 Groundwater quality samples were collected from monitoring wells MW-2R, MW-3, MW-4,
MW-4R, MW-6, MW-7, MW-9, MW-10, MW-11 and MW-13 on December 29, 2022.
Monitoring well MW-2 was not sampled due to the presence of free product; monitoring
wells MW-5 and MW-12 could not be located; monitoring wells MW-1 and MW-8 were not
located and have been buried beneath soil moved during regrading activities conducted by
the current property owner. A map depicting the estimated extent of free product is provided
as Figure 4.

 The results of the laboratory data for the groundwater samples collected were compared
against the Gross Contamination Levels (GCLs). The analytical data presented for the
constituents detected was determined based on the highest result from the various EPA
Methods described above. A review of the laboratory analytical results indicated the
following constituents were above applicable regulatory standards:

 Benzene
 GCL: MW-2R
 Methyl-tert-butyl-ether (MTBE)
 GCL: MW-2R and MW-7
 Ethylene Dibromide (EDB)
 GCL: MW-6

Based upon a review of the current analytical data from December 2022, the estimated size
of the area of benzene exceeding GCL Standards is approximately 1,625 square feet. The
plume of MTBE contaminants exceeding GCL Standards is approximately 2,700 square
feet. The plume is primarily located on the subject property and spanning beneath the
Corrective Action Performance Report February 14, 2023
(Former) Servco No. 01711 Incident No. 20966
Winston-Salem, North Carolina Excel No. 24090

EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC 
www.excelengr.com

former Servco building south to the former UST tank pit. The remaining constituents are a
minor portion of the benzene and MTBE plumes. Some seasonal fluctuations were
observed in the groundwater quality data from select wells.

 The onsite remediation system was placed into operation in January of 2015. The soil vapor
extraction system is comprised of two vapor extraction wells. The goal of the remediation
system is to eliminate free product utilizing vacuum enhanced pneumatic skimmers within
the source area. During the September 2021 site visit, Excel restarted the vacuum
enhanced free product recovery system and completed the groundwater sampling event.
Excel attempted to restart the SVE system during the September 2021 site visit and found
the vacuum blower to be locked up.

 Based on the liquid level data collected, groundwater flow is estimated to be to the south. A
groundwater contour map is included as Figure 3.

 Results of past receptor surveys completed by Excel during assessment activities indicate
that supply wells were not identified within 1,500 feet of the property. Additionally, according
to the USGS Topographical Map no surface water bodies are located within 1,500 feet of
the source area.

FREE PRODUCT REMOVAL

 Based upon a review of the current analytical data, the estimated size of the LNAPL is
approximately 75 square feet, primarily located to the south of the former SERVCO building.

 LNAPL was measured in MW-2 during the December 2022 sampling event at a thickness of
0.06 feet. This is a decrease from the initial thickness of 0.44 feet measured in April of 2015.
No LNAPL was observed in MW-2R, MW-4 or MW-4R during the reporting period (refer to
Table 1 and Figure 4).

 Per the corrective action plan, once free product levels have been reduced to below
measurable levels, the system will be shutoff and monitored natural attenuation monitoring
will commence.

PLUME STABILITY EVALUATION

Based upon a review of the current analytical data from December 2022 sampling event, the
estimated size of the area of benzene exceeding GCL Standards is approximately 1,625 square
feet. The plume of MTBE contaminants exceeding GCL Standards is approximately 2,700
square feet. The plume is primarily located on the subject property and spanning beneath the
former Servco building south to the former UST tank pit. The remaining constituents are a
minor portion of the benzene and MTBE plumes. Some seasonal fluctuations were observed in
the groundwater quality data from select wells.

Excel conducted a Mann-Kendall constituent trend analysis (Appendix A) which relies on three
statistical metrics, an “S” statistic which indicates whether concentration trend vs. time is
generally decreasing or increasing; a confidence factor (CF) which modifies the S statistic to
indicate the degree of confidence in the trend result; and a coefficient of variation (COV) to
distinguish describe the variability in the data set. The analysis included an evaluation of both
the overall reductions in the areal extent and plume length for constituents of concern as well as
Corrective Action Performance Report February 14, 2023
(Former) Servco No. 01711 Incident No. 20966
Winston-Salem, North Carolina Excel No. 24090

EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC 
www.excelengr.com

an evaluation of the stability of the plume constituent concentrations for monitor wells in the core
and leading edge of the plume.

 The results of the concentrations evaluation for benzene (MW-1, MW-3, MW-6 and MW-7)
for MTBE (MW-1, MW-3, MW-6, MW-7 and MW-8) indicated the following:

o Benzene:
 Stable: MW-1;
 No Trend: MW-7;
 Decreasing: MW-3 & MW-6
o MTBE:
 Stable: MW-8;
 No Trend: MW-1 & MW-7;
 Decreasing: MW-3 & MW-6

A review of the analytical results from the previous sampling round conducted in June of 2022
indicates a decrease in BTEX levels for MW-2R and MW-7 of 22-% and 64-%, respectively.
Excel recommends monitoring well MW-1 be replaced in order to more accurately gauge current
constituent levels on the subject property.

CONCLUSIONS & RECOMMENDATIONS

 In summary, current laboratory analytical data indicates that overall dissolved phase
hydrocarbon constituents (primarily BTEX and MTBE) continue to occur at the site and are
decreasing with some seasonal fluctuations. Remaining constituent levels exceed the GCL
and NCAC 2L Standards at multiple locations for various constituents.

 Excel attempted to restart the SVE system during the September 2021 site visit and found
the vacuum blower to be locked up. Several feet of soil have been placed and compacted
around the remediation compound making vehicular access difficult to potentially remove
the blower for evaluation. Excel recommends an onsite evaluation of the blower be
completed to determine the issue.

 Monitoring well MW-1 is buried beneath several feet of recently placed and compacted soil.
Locating MW-1 during future site visits will be unlikely. Excel recommends replacing MW-1
in order to accurately determine constituent concentrations at the property.

 At this time and based on the information in this report, we recommend continued operation
of the vacuum enhanced free product recovery, free product recovery efforts at monitoring
wells MW-2, and continuing semiannual groundwater sampling of select wells.

Monitoring Report February 14, 2023
(Former) Servco No. 01711 Incident No. 20966
Winston-Salem, North Carolina Excel No. 24090
EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC 
www.excelengr.com

SUMMARY OF FIELD ACTIVITIES
7/20/22: The SVE system was down upon arrival. The FP recovery system was running upon
arrival. Excel checked MW-2, MW-2R, MW-4 and MW-4R for free product. No free
product was detected during the site visit. The FP recovery system was operational at
departure.
8/24/22: The SVE system was down upon arrival. The FP recovery system was running upon
arrival. Excel checked MW-2, MW-2R, MW-4 and MW-4R for free product. Free
product was detected in MW-2 at a thickness of 0.01 feet. The FP recovery system
was operational at departure.
9/21/22: The SVE system was down upon arrival. The FP recovery system was running upon
arrival. Excel checked MW-2, MW-2R, MW-4 and MW-4R for free product. Free
product detected in MW-2 at a thickness of 0.04 feet. Product/water mixture was
measured in recovery tank. Approximately 0.45’ of recovered groundwater was
measured. The FP recovery system was operational at departure.
10/19/22: The SVE system was down upon arrival. The FP recovery system was running upon
arrival. Excel checked MW-2, MW-2R, MW-4 and MW-4R for free product. Free
product detected in MW-2 at a thickness of 0.04 feet. Product/water mixture was
measured in recovery tank. Approximately 0.6’ of recovered groundwater was
measured. The FP recovery system was operational at departure.
11/18/22: The SVE system was down upon arrival. The FP recovery system was running upon
arrival. Excel checked MW-2, MW-2R, MW-4 and MW-4R for free product. Free
product detected in MW-2 at a thickness of 0.03 feet. Product/water mixture was
measured in recovery tank. The FP recovery system was operational at departure.
12/29/22: Both the SVE system and FP recovery systems were down upon arrival. Excel
determine the air compressor had failed. The air compressor was removed and
replaced. In addition, one of the air lines was found to be broken and was repaired.
The secondary containment around the free product recovery tank was emptied.
Checked MW-2, MW-2R, MW-4 and MW-4R for free product. Free product detected
in MW-2 at a thickness of 0.06 feet. The FP recovery system was operational at
departure.

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www.excelengr.com
TABLES
Table 1 – Monitoring Well Construction and Liquid Level Data
Table 2 – Summary of Current Groundwater Analytical Data
Table 3 – Summary of Historical Groundwater Analytical Data
Table 4 – Groundwater Sample Field Measurements
Table 1 (B-7)Monitoring Well Construction and Liquid Level Data(Former) SERVCO No. 01711850 North Liberty StreetWinston-Salem, North CarolinaNCDEQ Incident No. 20966Excel Project No. 24090Well IDDate InstalledTotal DepthScreen IntervalTop of Casing ElevationDepth to ProductDepth to WaterProduct ThicknessWater Table ElevationMW-1 02/01/00 47 37 - 47 99.44MW-2 02/02/00 47 37 - 47 98.65 36.12 36.18 0.06 62.52MW-2R 09/17/19 47 22 - 47 98.01 -- 35.83 --62.18MW-3 02/02/00 47 37 - 47 98.56 -- 36.82 --61.74MW-4 02/01/00 48 38 - 48 98.44 -- 35.43 --63.01MW-4R 09/17/19 48 23 - 48 97.64 -- 35.53 --62.11MW-5 02/01/00 49 39 - 49 100.00MW-6 02/24/10 45 25 - 45 98.20 -- 35.83 --62.37MW-7 02/24/10 45 25 - 45 99.27 -- 37.15 --62.12MW-8 05/11/11 45 25 - 45 100.15MW-9 05/11/11 45 25 - 45 96.92 -- 35.76 --61.16MW-10 05/11/11 45 25 - 45 98.28 -- 37.60 --60.68MW-11 05/11/11 45 25 - 45 97.19 -- 37.26 --59.93MW-12 05/11/11 45 25 - 45 99.38MW-13 11/24/14 45 25 - 45 97.56 -- 35.72 --61.84NOTES:All data presented in feetWater level data collected on December 29, 2022NOT LOCATEDNOT LOCATEDNOT LOCATED (Buried)NOT LOCATED (Buried)
Table 2Summary of Current Groundwater Analytical Data(Former) SERVCO No. 01711850 North Liberty StreetWinston-Salem, North CarolinaNCDEQ Incident No. 20966Excel Project No. 24090DATE SAMPLED29-Dec-22 29-Dec-22 29-Dec-22 29-Dec-22 29-Dec-22 29-Dec-22 29-Dec-22 29-Dec-22BENZENE215 B 1,7103,370 124<0.0941< 0.094115,000TOLUENE664 6,330134 J 28.9 <0.278<0.278600 260,000ETHYLBENZENE203504105 J 103 <0.137< 0.137600 84,500TOTAL XYLENES1,328 5,4101,766 1,291<0.604< 0.604500 85,500TOTAL BTEX2,195 13,9545,136 1,546.9 ~1.11~1.11 -- --MTBE13,000 49,20073.9 J84.00.774 J< 0.1012020,000DI-ISOPROPYL ETHER< 21181 J< 21 3.85 J < 0.105<0.1057070,000METHYLENE CHLORIDE<86<215< 86<4.3 <0.43<0.4355,000NAPHTHALENE282 J<500< 20070.2<1<166,000ACETONE<2,260 <5,650< 2,260 <113 <11.3<11.36,000 6,000,000n-BUTYLBENZENE< 31.4 <78.5< 31.4 2.97 J <0.157<0.157706,900sec-BUTYLBENZENE<25 <62.5< 25.0 4.66 J <0.125<0.125708,5001,2-DIBROMOETHANE68.9 J<63< 25.2 <1.26 <0.126<0.1260.02501,2-DICHLOROETHANE<16.4 <40.9< 16.4 <0.819 <0.0819<0.08190.4400ISOPROPYLBENZENE< 2161.2 J30.4 J 36.6 <0.105<0.1057025,0002-BUTANONE729 J <595< 238 <11.9 <1.19<1.194,000 4,000,0004-METHYL-2-PENTANONE 204 J<239<95.6 <4.78 <0.478<0.478100 100,000n-PROPYLBENZENE33.6 J130 J24.8 J 16.8 <0.0993<0.09937030,0001,2,4-TRIMETHYLBENZENE 554 1,110197 J 218 <0.322< 0.322400 28,5001,3,5-TRIMETHYLBENZENE24334468.5 J 75.7 <0.104<0.104400 25,000NOTES:Additional Constituents Reported for 12-22 Sampling:Data in micrograms per liter or g/lMW-10 - p-Isopropyltoluene 6.87 J ug/LMTBE - Methyl tertiary butyl etherNA - Not AnalyzedGCLs - Gross Contamination Levels NCAC - North Carolina Administrative CodeBOLD data represents levels above 2LHighlighted data indicates level above GCLsEDB - Ethylene Dibromide, reported as 1,2-Dibromoethane on Table 2IPE-reported as Di-isopropyl ether on Table 2SAMPLE IDMW-13NCAC 2L GCLsMW-6 MW-7 MW-8 MW-9NOT LOCATEDNOT LOCATEDMW-10 MW-11 MW-12
Table 2Summary of Current Groundwater Analytical Data(Former) SERVCO No. 01711850 North Liberty StreetWinston-Salem, North CarolinaNCDEQ Incident No. 20966Excel Project No. 24090DATE SAMPLED29-Dec-22 29-Dec-22 29-Dec-22 29-Dec-22 29-Dec-22 29-Dec-22 29-Dec-22BENZENE11,400< 0.0941154 B,J 34215,000TOLUENE55,800< 0.2785,560 9,530600 260,000ETHYLBENZENE5,810< 0.1379972,67060084,500TOTAL XYLENES28,150< 0.6046,420 15,35050085,500TOTAL BTEX101,160 ~1.11 12,977 27,892 -- --MTBE128,000 27.757 J 28.7 J2020,000DI-ISOPROPYL ETHER324 J0.224 J < 26.3 <10.57070,000METHYLENE CHLORIDE<430 < 0.430 < 108 <4355,000NAPHTHALENE1,590 J<1402 J90566,000ACETONE<11,300 < 11.3 <2,820 <1,1306,000 6,000,000n-BUTYLBENZENE<157 < 0.157 <39.3 25.6 J706,900sec-BUTYLBENZENE<125 < 0.125 <31.3 18.4 J708,5001,2-DIBROMOETHANE<126 < 0.126 <31.5 23.4 J0.02501,2-DICHLOROETHANE<81.9 < 0.0819 <20.5 <8.190.4400ISOPROPYLBENZENE302 J< 0.10543.4 J 1037025,0002-BUTANONE<1,190 < 1.19 <298 <1194,000 4,000,0004-METHYL-2-PENTANONE<478 < 0.478 <120 <47.8100 100,000n-PROPYLBENZENE809 J< 0.099398.9 J 2387030,0001,2,4-TRIMETHYLBENZENE4,830< 0.3221,070 2,26040028,5001,3,5-TRIMETHYLBENZENE1,290< 0.10433759040025,000NOTES:Additional Constituents Reported for 12-22 Sampling:Data in micrograms per liter or g/lMW-2R - p-Isopropyltoluene 180 J ug/LMTBE - Methyl tertiary butyl ether MW-4 - Styrene 35.9 J ug/LNA - Not Analyzed MW-4R - p-Isopropyltoluene 36.9 J ug/L; Styrene 36.9 J ug/LGCLs - Gross Contamination Levels NCAC - North Carolina Administrative CodeBOLD data represents levels above 2LHighlighted data indicates level above GCLsEDB - Ethylene Dibromide, reported as 1,2-Dibromoethane on Table 2IPE-reported as Di-isopropyl ether on Table 2NCAC 2L GCLsNOT LOCATEDMW-5SAMPLE ID MW-3 MW-4MW-2MW-1NOT LOCATEDMW-2RNOT SAMPLED - FP OBSERVEDMW-4R
Table 3
Summary of Historical Groundwater Analytical Data
(Former) SERVCO No. 01711
850 North Liberty Street
Winston-Salem, North Carolina
NCDEQ Incident No. 20966
Excel Project No. 24090
Well ID Sample
Date Benzene Toluene Ethylbenzene Xylenes MTBE IPE Naphthalene EDB
1 600 600 500 20 70 6 0.02
5,000 257,500 29,000 87,500 20,000 70,000 6,000 50
02/09/00 13,800 36,840 2,246 11,757 30,590 7,980 79.2 0.68
11/02/10 9,300 25,000 2,200 17,300 66,000 1,200 < 2,500 < 500
05/19/11 20,000 48,000 3,200 17,600 940,000 1,100 < 2,500 < 500
11/21/13 19,000 44,000 2,300 13,500 890,000 1,200 < 5,000 0.45
05/28/15 19,800 68,300 4,790 J 29,510 J 597,000 928 14,700 J < 3,800
11/17/15 16,100 43,300 J < 3,840 13,960 J 439,000 < 3,200 < 10,000 < 3,810
03/24/17 18,200 52,300 3,620 22,160 633,000 977 < 500 < 190
10/12/17 9,370 36,400 2,650 16,580 426,000 < 32 < 500 < 0.38
3/21 - 12/22
10/12/17 3,650 28,700 4,340 24,800 7,620 < 160 991 < 190
3/21 - 12/22
03/25/21 9,830 40,700 3,060 15,610 81,200 361 J 504 J < 63
09/15/21 8,570 37,600 3,260 15,050 82,400 294 J < 1,000 < 126
06/23/22 21,100 74,000 5,880 27,490 182,000 608 J 1,700 J < 126
12/29/22 11,400 55,800 5,810 28,150 128,000 324 J 1,590 J < 126
02/09/00 23,320 56,430 3,088 17,666 325,500 1,380 NA 27.8
11/02/10 5,900 16,000 2,000 10,600 24,000 610 900 180
05/19/11 4,900 16,000 2,000 10,700 23,000 350 < 1,200 < 250
11/21/13 6,100 17,000 2,300 11,800 27,000 440 650 8.0
05/28/15 10,300 36,900 3,290 17,700 25,500 331 J 606 J < 190
11/17/15 9,040 25,200 1,970 10,080 33,200 367 J < 500 < 190
03/24/17
10/12/17 1,860 3,270 688 2,428 19,100 213 < 200 < 76.2
03/25/21
09/15/21 2.33 < 0.278 < 0.137 0.221 J 3,710 35 < 1 < 0.126
06/23/22 26.8 < 1.39 < 0.685 < 3.02 344 2.25 J < 5 < 0.63
12/29/22 < 0.0941 < 0.278 < 0.137 < 0.604 27.7 0.224 J < 1 < 0.126
02/09/00 9,000 26,650 2,476 13,909 28,700 27,860 NA 610
11/17/15 < 3,310 11,000 J < 3,840 12,210 J < 3,670 < 3,200 < 10,000 < 3,810
3/25/21 4,080 21,800 1,820 10,950 95.4 J 52.6 J 854 J 168 J
9/15/21 3,010 21,500 2,020 11,520 127 J < 26.3 737 J 164 J
6/23/22 2,410 21,200 2,220 13,340 131 J 28.2 J 738 J < 31.5
12/29/22 153 B,J 5,560 997 6,420 57 J < 26.3 402 J < 31.5
3/25/21 88.4 2,010 636 4,110 < 2.02 < 2.10 393 < 2.52
9/15/21 175 5,070 1,290 7,130 < 10.1 < 10.5 630 < 12.6
6/23/22 327 8,480 2,480 13,690 42.2 J < 10.5 770 < 12.6
12/29/22 342 9,530 2,670 15,350 28.7 J < 10.5 905 23.4 J
02/09/00 3.5 4.16 2.2 10.89 NA NA NA BDL
11/10-12/22
11/02/10 13,000 39,000 3,300 17,800 69,000 630 130 < 25
05/19/11 10,000 31,000 2,500 14,100 95,000 460 620 420
11/21/13 6,500 20,000 1,900 10,400 58,000 380 500 26
05/28/15 13,700 47,800 1,920 11,200 41,900 228 433 < 380
11/17/15 3,360 10,400 757 J 4,070 24,300 < 320 < 1,000 < 381
03/24/17 3,530 12,100 1,020 7,690 33,700 216 301 J 290
10/12/17 3,970 19,100 1,340 8,670 52,000 < 8.0 502 < 0.952
01/07/21 127 365 97.7 959 6,650 47.2 178 C5 94
09/15/21 208 515 156 J 1,383 11,900 < 21 223 J 85.9 J
06/23/22 372 940 234 1,677 17,400 63.6 J 419 J 83.1 J
12/29/22 215 B 664 203 1,328 13,000 < 21 282 J 68.9 J
MW-4R
MW-6
MW-5
NCAC 2L Standards
GCLs
NOT SAMPLED - NOT LOCATED
MW-2
NOT SAMPLED – LNAPL OBSERVED
NOT SAMPLED - NOT LOCATED
NOT SAMPLED – LNAPL OBSERVED2/00 – 3/17
NOT SAMPLED - NOT LOCATED
MW-1
MW-3
MW-2R
11/10 – 5/15 NOT SAMPLED – LNAPL OBSERVED
NOT SAMPLED – NOT LOCATED
NOT SAMPLED - LNAPL OBSERVED3/17 - 10/17MW-4
Table 3
Summary of Historical Groundwater Analytical Data
(Former) SERVCO No. 01711
850 North Liberty Street
Winston-Salem, North Carolina
NCDEQ Incident No. 20966
Excel Project No. 24090
Well ID Sample
Date Benzene Toluene Ethylbenzene Xylenes MTBE IPE Naphthalene EDB
1 600 600 500 20 70 6 0.02
5,000 257,500 29,000 87,500 20,000 70,000 6,000 50
NCAC 2L Standards
GCLs
11/02/10 480 1,100 270 3,080 2,600 30 < 1,200 550
05/19/11 2,600 6,700 560 4,300 13,000 < 250 < 1,200 < 250
11/21/13 4,400 9,000 910 5,600 31,000 120 180 0.073
05/28/15 21,400 50,800 1,180 8,740 134,000 371 J 226 < 380
11/17/15 10,600 22,600 1,020 6,970 173,000 384 J < 1,000 < 381
03/24/17 5,250 7,430 386 4,900 53,700 144 111 J < 38.1
10/12/17 3,720 7,320 383 3,730 39,500 < 0.320 124 < 38.1
03/25/21 2,010 3,590 226 J 3,184 22,900 124 J 633 J < 31.5
09/15/21 1,670 4,490 312 3,430 27,200 125 122 J < 3.15
06/23/22 6,330 19,700 1,540 11,010 156,000 426 J <500 <63.0
12/29/22 1,710 6,330 540 5,410 49,200 181 J <500 <63.0
05/19/11 490 < 1,200 < 250 < 750 37,000 < 250 < 1,200 < 250
11/21/13 < 500 < 25 < 5 < 1,500 44,000 73 < 25 < 0.01
05/28/15 299 < 390 < 190 265 24,700 < 640 11.5 J < 190
11/17/15 < 166 < 390 < 192 < 530 17,100 < 160 < 500 < 190
03/24/17 < 1.66 < 2.06 < 1.92 < 5.30 17,100 23.4 < 5 < 1.9
10/12/17 < 66.2 < 82.4 < 0.384 < 2.0 20,000 < 32.0 < 1.0 < 38.1
3/21 - 12/22
05/19/11 1,400 49 100 560 18 < 5 < 50 < 10
11/21/13 220 5.7 5.2 165 < 5 < 1 6.2 0.08
05/28/15 2,870 182 228 3,470 99.9 < 16 173 < 1.9
11/17/15 4,340 203 397 3,320 < 3.67 < 3.2 167 < 3.81
03/24/17 4,450 87.6 153 1,481 < 18.4 < 16 65.7 J < 19
10/12/17 4,380 117 113 1,930 < 18.4 < 16 90.6 J < 19
01/07/21 2,140 61.5 41 1,218 < 2.02 < 2.10 78.2 J < 2.52
09/15/21 1,870 55.4 88.8 854 < 2.02 < 2.10 54.4 J < 2.52
06/23/22 4,140 144 143 2,631 < 2.02 < 2.10 108 < 2.52
12/29/22 3,370 134 J 105 J 1,766 73.9 J < 21 < 200 < 25.2
05/19/11 26 < 50 250 1,180 27 < 10 < 50 < 10
11/21/13 4.8 < 5 13 78 24 1.8 7.4 < 0.01
05/28/15 34.8 7.79 77.2 468 80.1 5.3 31.3 < 0.38
11/17/15 154 5.7 41.2 409 123 11.3 36.3 < 0.38
03/24/17 80 1.73 12.7 150.1 183 10.1 18.5 < 0.38
10/12/17 35.6 2.79 30.6 199.9 85 5.16 14.6 1.29
01/07/21 95.1 16.9 174 862 146 8.24 J 74.8 C5 < 1.26
09/15/21 93.3 13.4 56.2 1,094 82.5 4.96 J 88.2 < 1.26
06/23/22 130 16.8 106 1,567 62.3 5.15 J 81.9 < 1.26
12/29/22 124 28.9 103 1,291 84 3.85 J 70.2 < 1.26
MW-7
MW-9
MW-10
MW-8
NOT SAMPLED – NOT LOCATED
Table 3
Summary of Historical Groundwater Analytical Data
(Former) SERVCO No. 01711
850 North Liberty Street
Winston-Salem, North Carolina
NCDEQ Incident No. 20966
Excel Project No. 24090
Well ID Sample
Date Benzene Toluene Ethylbenzene Xylenes MTBE IPE Naphthalene EDB
1 600 600 500 20 70 6 0.02
5,000 257,500 29,000 87,500 20,000 70,000 6,000 50
NCAC 2L Standards
GCLs
05/19/11 < 1 < 5 < 1 < 3 39 1.3 < 5 < 1
11/21/13 < 1 < 5 < 1 < 3 < 1 < 1 < 5 < 0.01
05/28/15 < 0.33 < 0.78 < 0.38 1.267 J 0.941 J < 0.32 < 1 < 0.38
11/17/15 < 0.33 < 0.78 < 0.38 < 1.06 1.91 < 0.32 1.01 J < 0.38
03/24/17 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 < 0.38
10/12/17 < 0.33 < 0.41 < 0.38 < 1.06 0.634 J < 0.32 < 1 < 0.38
03/25/21 < 0.0941 < 0.278 < 0.137 < 0.604 0.199 J < 0.105 < 1 < 0.126
09/15/21 < 0.0941 < 0.278 < 0.137 < 0.604 2.73 < 0.105 < 1 < 0.126
06/23/22 < 0.0941 < 0.278 < 0.137 <0.604 142 2.11 < 1 < 0.126
12/29/22 < 0.0941 < 0.278 < 0.137 < 0.604 0.774 J < 0.105 < 1 < 0.126
05/19/11 3,100 790 < 100 1,770 7,800 150 < 500 < 100
11/21/13 1,800 < 2,500 49 < 1,500 35,000 54 25 < 0.01
5/15 - 12/22
05/28/15 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 < 0.38
11/17/15 < 0.33 < 0.78 < 0.38 < 1.06 < 0.37 < 0.32 < 1 < 0.38
03/24/17 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 < 0.38
10/12/17 < 0.33 < 0.41 < 0.38 < 1.06 < 0.37 < 0.32 < 1 < 0.38
03/25/21 < 0.0941 < 0.278 < 0.137 < 0.604 < 0.101 < 0.105 < 1 < 0.126
09/15/21 < 0.0941 < 0.278 < 0.137 0.202 J 0.155 J < 0.105 < 1 < 0.126
06/23/22 0.248 J < 0.278 0.465 J 3.71 0.373 J < 0.105 < 1 < 0.126
12/29/22 < 0.0941 < 0.278 < 0.137 < 0.604 < 0.101 < 0.105 < 1 < 0.126
Data provided in micrograms per liter or g/l EDB - Ethylene Dibromide, reported as 1,2-Dibromoethane on Table 2 IPE - Di-isopropyl ether
GCL - Gross Contamination Level IPE-reported as Di-isopropyl ether on Table 2 LNAPL - Light Non-Aqueous Phase Liquid
BDL - Below Detection Limit NA - Not applicable / Not Analyzed Highlighted data indicates level above GCLs
MTBE - Methyl tert-butyl ether Bold data indicates level above NCAC 2L Standards MW-9-n-Propylbenzene 30.3 J ug/L
MW-13
MW-12
NOT LOCATED
MW-11
Electrical
Conductivity ORP
(µS/cm)
MW-1
MW-2
MW-2R 5.21 0.140 129 4.00 17.96
MW-3 5.92 0.044 201 4.73 17.38
MW-4 6.28 0.077 18 4.12 19.36
MW-4R 5.96 0.088 68 4.02 19.45
MW-5
MW-6 6.17 0.331 100 3.71 18.14
MW-7 5.48 0.530 192 3.62 18.48
MW-8
MW-9 5.35 0.353 140 4.83 18.09
MW-10 5.22 0.344 138 4.05 18.17
MW-11 5.29 0.033 185 4.35 17.82
MW-12
MW-13 5.19 0.064 179 6.23 18.01
Notes:SU Standard units
µS/cm Microsiemens per centimeter
ppm Parts per million
0C Degrees Celsius
NS Not sampled, (Dry, Not Located, Destroyed, etc…)
MW Monitoring Well
FIELD MEASUREMENTS OF THE GROUNDWATER SAMPLES
(Former) Servco No. 01711
850 North Liberty Street, Winston-Salem, North Carolina
Excel Project No. 24090
Well
Identification
Sampling
Date
pH
(su)
Temperature
(0C)
Disolved
Oxygen
(ppm)
Not Located
Not Located
Not Located
12/29/22
Not Located
Free Product Observed

EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC 
www.excelengr.com

FIGURES

Figure 1 – Site Vicinity

Figure 2 – Site Plan

Figure 3 – Groundwater Contour Map

Figure 4 – Approximate LNAPL Extent Map

Figure 5 – Groundwater Constituents Map

EXCEL CIVIL & ENVIRONMENTAL
ASSOCIATES, PLLC
625 HUNTSMAN COURT
GASTONIA, NC 28054
[phone]
FIGURE 1 –
SITE VICINITY MAP 
N Source: U.S.G.S. 7.5 Minute Topographic Map
Winson-Salem East-NC, Quadrangle, 1991

PHONE : [phone] HUNTSMAN COURT, GASTONIA, NC 28054PREPARED FOR :PROJECT NO. :Civil & Environmental Associates, PLLC24090MAP TITLE :SCALE :SERVICE DISTRIBUTING CO., INC.850 NORTH LIBERTY STREET, WINSTON-SALEM, NC(FORMER) SERVCO NO. 01711ACLDRAWN BY :FIGURE 2 - SITE PLANDATE :1" = 20'11/22/2021ExcelMONITORING REPORT

EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC 
www.excelengr.com

APPENDIX A – MANN-KENDALL GRAPHS

Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:mg/L
Sampling Point ID:MW-1 MW-3 MW-6 MW-7
Sampling SamplingEventDate
1 02/09/00 13.800 23.320
2 11/02/10 9.300 5.900 13.000 0.480
3 05/19/11 20.000 4.900 10.000 2.600
4 11/21/13 19.000 6.100 6.500 4.400
5 05/28/15 19.800 10.300 13.700 21.400
6 11/17/15 16.100 9.040 3.3600 10.600
7 03/24/17 18.200 3.5300 5.250
8 10/12/17 9.370 1.860 3.9700 3.7200
9 03/25/21 0.1270 2.0100
10 09/15/21 0.00233 0.20800 1.6700
11 06/23/22 0.0268 0.37200 6.33000
12 12/29/22 0.0009 0.21500 1.71000
13
14
15
16
17
18
19
20
Coefficient of Variation:0.28 1.16 1.03 1.10
Mann-Kendall Statistic (S):-2 -27 -33 -5
Confidence Factor:54.8% 99.2% 99.5% 61.9%
Concentration Trend:Stable Decreasing Decreasing No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
A. Long
24090
GSI Environmental Inc., www.gsi-net.com
BENZENE CONCENTRATION (mg/L)
9-Feb-23
Servco Winston-Salem Benzene
0.0001
0.001
0.01
0.1
1
10
100
01/00 09/13 05/27 01/41 10/54 06/68 02/82 10/95 07/09 03/23 11/36Concentration (mg/L)Sampling Date
MW-1
MW-3
MW-6
MW-7
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:mg/L
Sampling Point ID:MW-1 MW-3 MW-6 MW-7 MW-8
Sampling SamplingEventDate
1 02/09/00 30.590 325.500
2 11/02/10 66.000 24.000 69.000 2.600
3 05/19/11 940.000 23.000 95.000 13.000 37.000
4 11/21/13 890.000 27.000 58.000 31.000 44.000
5 05/28/15 597.000 25.500 41.900 134.000 24.700
6 11/17/15 439.000 33.200 24.300 173.000 17.100
7 03/24/17 633.000 33.700 53.700 17.100
8 10/12/17 426.000 19.100 52.000 39.500 20.000
9 03/25/21 6.6500 22.900
10 09/15/21 3.710 11.900 27.200
11 06/23/22 0.344 17.400 156.000
12 12/29/22 0.028 13.000 49.200
13
14
15
16
17
18
19
20
Coefficient of Variation:0.67 2.04 0.72 0.95 0.42
Mann-Kendall Statistic (S):2-29-3515-8
Confidence Factor:54.8% 99.5% 99.7% 85.9% 89.8%
Concentration Trend:No Trend Decreasing Decreasing No Trend Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
MTBE CONCENTRATION (mg/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
9-Feb-23 24090
Servco Winston-Salem MTBE
A. Long
0.01
0.1
1
10
100
1000
01/00 09/13 05/27 01/41 10/54 06/68 02/82 10/95 07/09 03/23 11/36Concentration (mg/L)Sampling Date
MW-1
MW-3
MW-6
MW-7
MW-8

EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC 
www.excelengr.com

APPENDIX B – LABORATORY ANALYSES & CHAIN OF CUSTODY FORM

ANALYTICAL REPORT
January 11, 2023
Excel Civil & Environmental Associates
Sample Delivery Group:L1572616
Samples Received:01/04/2023
Project Number:
Description:Servco 01711
Site:WINSTON SALEM, NC
Report To:Aaron Long
625 Huntsman Court
Gastonia, NC 28054
Entire Report Reviewed By:
January 11, 2023
[Preliminary Report]
Heather J Wagner
Project Manager
Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided, and as the samples are received.
Pace Analytical National
12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 www.pacenational.com
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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January 11, 2023
Heather J Wagner
Project Manager
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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TABLE OF CONTENTS
Cp: Cover Page 1
Tc: Table of Contents 2
Ss: Sample Summary 3
Cn: Case Narrative 5
Sr: Sample Results 6
MW-3 L1572616-01 6
MW-7 L1572616-02 8
MW-6 L1572616-03 10
MW-4 L1572616-04 12
MW-4R L1572616-05 14
MW-2R L1572616-06 16
MW-11 L1572616-07 18
MW-13 L1572616-08 20
MW-9 L1572616-09 22
MW-10 L1572616-10 24
TRIP BLANK L1572616-11 26
Qc: Quality Control Summary 28
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 28
Gl: Glossary of Terms 36
Al: Accreditations & Locations 37
Sc: Sample Chain of Custody 38
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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SAMPLE SUMMARY
Collected by Collected date/time Received date/time
MW-3 L1572616-01 GW C DeVane 12/29/22 13:00 01/04/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1986337 1 01/10/23 20:57 01/10/23 20:57 JHH Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-7 L1572616-02 GW C DeVane 12/29/22 13:25 01/04/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1986337 500 01/10/23 21:40 01/10/23 21:40 JHH Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-6 L1572616-03 GW C DeVane 12/29/22 13:45 01/04/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1984826 200 01/07/23 16:27 01/07/23 16:27 ACG Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-4 L1572616-04 GW C DeVane 12/29/22 14:05 01/04/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1984826 250 01/07/23 16:47 01/07/23 16:47 ACG Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-4R L1572616-05 GW C DeVane 12/29/22 14:25 01/04/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1984826 100 01/07/23 17:06 01/07/23 17:06 ACG Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-2R L1572616-06 GW C DeVane 12/29/22 14:50 01/04/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1984826 1000 01/07/23 17:25 01/07/23 17:25 ACG Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-11 L1572616-07 GW C DeVane 12/29/22 16:25 01/04/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1984826 1 01/07/23 13:54 01/07/23 13:54 ACG Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-13 L1572616-08 GW C DeVane 12/29/22 15:50 01/04/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1984826 1 01/07/23 14:13 01/07/23 14:13 ACG Mt. Juliet, TN
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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SAMPLE SUMMARY
Collected by Collected date/time Received date/time
MW-9 L1572616-09 GW C DeVane 12/29/22 15:30 01/04/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1984826 200 01/07/23 17:44 01/07/23 17:44 ACG Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-10 L1572616-10 GW C DeVane 12/29/22 15:05 01/04/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1984826 10 01/07/23 18:03 01/07/23 18:03 ACG Mt. Juliet, TN
Collected by Collected date/time Received date/time
TRIP BLANK L1572616-11 GW C DeVane 12/29/22 00:00 01/04/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1984826 1 01/07/23 13:16 01/07/23 13:16 JHH Mt. Juliet, TN
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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CASE NARRATIVE
All sample aliquots were received at the correct temperature, in the proper containers, with the
appropriate preservatives, and within method specified holding times, unless qualified or notated within
the report. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples
have been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control
are within established criteria except where addressed in this case narrative, a non-conformance form
or properly qualified within the sample results. By my digital signature below, I affirm to the best of my
knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the
quality of the data have been identified by the laboratory, and no information or data have been
knowingly withheld that would affect the quality of the data.
[Preliminary Report]
Heather J Wagner
Project Manager
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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Heather J Wagner
Project Manager
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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SAMPLE RESULTS - 01
L1572616
MW-3
Collected date/time: 12/29/22 13:00
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone U 11.3 50.0 1 01/10/2023 20:57 WG1986337
Acrolein U 2.54 50.0 1 01/10/2023 20:57 WG1986337
Acrylonitrile U 0.671 10.0 1 01/10/2023 20:57 WG1986337
Benzene U 0.0941 1.00 1 01/10/2023 20:57 WG1986337
Bromobenzene U 0.118 1.00 1 01/10/2023 20:57 WG1986337
Bromodichloromethane U 0.136 1.00 1 01/10/2023 20:57 WG1986337
Bromoform U 0.129 1.00 1 01/10/2023 20:57 WG1986337
Bromomethane U 0.605 5.00 1 01/10/2023 20:57 WG1986337
n-Butylbenzene U 0.157 1.00 1 01/10/2023 20:57 WG1986337
sec-Butylbenzene U 0.125 1.00 1 01/10/2023 20:57 WG1986337
tert-Butylbenzene U 0.127 1.00 1 01/10/2023 20:57 WG1986337
Carbon tetrachloride U 0.128 1.00 1 01/10/2023 20:57 WG1986337
Chlorobenzene U 0.116 1.00 1 01/10/2023 20:57 WG1986337
Chlorodibromomethane U 0.140 1.00 1 01/10/2023 20:57 WG1986337
Chloroethane U 0.192 5.00 1 01/10/2023 20:57 WG1986337
Chloroform U 0.111 5.00 1 01/10/2023 20:57 WG1986337
Chloromethane U 0.960 2.50 1 01/10/2023 20:57 WG1986337
2-Chlorotoluene U 0.106 1.00 1 01/10/2023 20:57 WG1986337
4-Chlorotoluene U 0.114 1.00 1 01/10/2023 20:57 WG1986337
1,2-Dibromo-3-Chloropropane U 0.276 5.00 1 01/10/2023 20:57 WG1986337
1,2-Dibromoethane U 0.126 1.00 1 01/10/2023 20:57 WG1986337
Dibromomethane U 0.122 1.00 1 01/10/2023 20:57 WG1986337
1,2-Dichlorobenzene U 0.107 1.00 1 01/10/2023 20:57 WG1986337
1,3-Dichlorobenzene U 0.110 1.00 1 01/10/2023 20:57 WG1986337
1,4-Dichlorobenzene U 0.120 1.00 1 01/10/2023 20:57 WG1986337
Dichlorodifluoromethane U 0.374 5.00 1 01/10/2023 20:57 WG1986337
1,1-Dichloroethane U 0.100 1.00 1 01/10/2023 20:57 WG1986337
1,2-Dichloroethane U 0.0819 1.00 1 01/10/2023 20:57 WG1986337
1,1-Dichloroethene U 0.188 1.00 1 01/10/2023 20:57 WG1986337
cis-1,2-Dichloroethene U 0.126 1.00 1 01/10/2023 20:57 WG1986337
trans-1,2-Dichloroethene U 0.149 1.00 1 01/10/2023 20:57 WG1986337
1,2-Dichloropropane U 0.149 1.00 1 01/10/2023 20:57 WG1986337
1,1-Dichloropropene U 0.142 1.00 1 01/10/2023 20:57 WG1986337
1,3-Dichloropropane U 0.110 1.00 1 01/10/2023 20:57 WG1986337
2,2-Dichloropropane U 0.161 1.00 1 01/10/2023 20:57 WG1986337
Di-isopropyl ether 0.224 J 0.105 1.00 1 01/10/2023 20:57 WG1986337
Ethylbenzene U 0.137 1.00 1 01/10/2023 20:57 WG1986337
Hexachloro-1,3-butadiene U 0.337 1.00 1 01/10/2023 20:57 WG1986337
Isopropylbenzene U 0.105 1.00 1 01/10/2023 20:57 WG1986337
p-Isopropyltoluene U 0.120 1.00 1 01/10/2023 20:57 WG1986337
2-Butanone (MEK)U 1.19 10.0 1 01/10/2023 20:57 WG1986337
Methylene Chloride U 0.430 5.00 1 01/10/2023 20:57 WG1986337
4-Methyl-2-pentanone (MIBK) U 0.478 10.0 1 01/10/2023 20:57 WG1986337
Methyl tert-butyl ether 27.7 0.101 1.00 1 01/10/2023 20:57 WG1986337
Naphthalene U 1.00 5.00 1 01/10/2023 20:57 WG1986337
n-Propylbenzene U 0.0993 1.00 1 01/10/2023 20:57 WG1986337
Styrene U 0.118 1.00 1 01/10/2023 20:57 WG1986337
1,1,1,2-Tetrachloroethane U 0.147 1.00 1 01/10/2023 20:57 WG1986337
1,1,2,2-Tetrachloroethane U 0.133 1.00 1 01/10/2023 20:57 WG1986337
Tetrachloroethene U 0.300 1.00 1 01/10/2023 20:57 WG1986337
Toluene U 0.278 1.00 1 01/10/2023 20:57 WG1986337
1,2,3-Trichlorobenzene U 0.230 1.00 1 01/10/2023 20:57 WG1986337
1,2,4-Trichlorobenzene U 0.481 1.00 1 01/10/2023 20:57 WG1986337
1,1,1-Trichloroethane U 0.149 1.00 1 01/10/2023 20:57 WG1986337
1,1,2-Trichloroethane U 0.158 1.00 1 01/10/2023 20:57 WG1986337
Trichloroethene U 0.190 1.00 1 01/10/2023 20:57 WG1986337
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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SAMPLE RESULTS - 01
L1572616
MW-3
Collected date/time: 12/29/22 13:00
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 0.160 5.00 1 01/10/2023 20:57 WG1986337
1,2,3-Trichloropropane U 0.237 2.50 1 01/10/2023 20:57 WG1986337
1,2,4-Trimethylbenzene U 0.322 1.00 1 01/10/2023 20:57 WG1986337
1,3,5-Trimethylbenzene U 0.104 1.00 1 01/10/2023 20:57 WG1986337
Vinyl chloride U 0.234 1.00 1 01/10/2023 20:57 WG1986337
o-Xylene U 0.174 1.00 1 01/10/2023 20:57 WG1986337
m&p-Xylenes U 0.430 2.00 1 01/10/2023 20:57 WG1986337
(S) Toluene-d8 98.4 80.0-120 01/10/2023 20:57 WG1986337
(S) 4-Bromofluorobenzene 91.4 77.0-126 01/10/2023 20:57 WG1986337
(S) 1,2-Dichloroethane-d4 89.8 70.0-130 01/10/2023 20:57 WG1986337
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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SAMPLE RESULTS - 02
L1572616
MW-7
Collected date/time: 12/29/22 13:25
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone U 5650 25000 500 01/10/2023 21:40 WG1986337
Acrolein U 1270 25000 500 01/10/2023 21:40 WG1986337
Acrylonitrile U 336 5000 500 01/10/2023 21:40 WG1986337
Benzene 1710 47.1 500 500 01/10/2023 21:40 WG1986337
Bromobenzene U 59.0 500 500 01/10/2023 21:40 WG1986337
Bromodichloromethane U 68.0 500 500 01/10/2023 21:40 WG1986337
Bromoform U 64.5 500 500 01/10/2023 21:40 WG1986337
Bromomethane U 303 2500 500 01/10/2023 21:40 WG1986337
n-Butylbenzene U 78.5 500 500 01/10/2023 21:40 WG1986337
sec-Butylbenzene U 62.5 500 500 01/10/2023 21:40 WG1986337
tert-Butylbenzene U 63.5 500 500 01/10/2023 21:40 WG1986337
Carbon tetrachloride U 64.0 500 500 01/10/2023 21:40 WG1986337
Chlorobenzene U 58.0 500 500 01/10/2023 21:40 WG1986337
Chlorodibromomethane U 70.0 500 500 01/10/2023 21:40 WG1986337
Chloroethane U 96.0 2500 500 01/10/2023 21:40 WG1986337
Chloroform U 55.5 2500 500 01/10/2023 21:40 WG1986337
Chloromethane U 480 1250 500 01/10/2023 21:40 WG1986337
2-Chlorotoluene U 53.0 500 500 01/10/2023 21:40 WG1986337
4-Chlorotoluene U 57.0 500 500 01/10/2023 21:40 WG1986337
1,2-Dibromo-3-Chloropropane U 138 2500 500 01/10/2023 21:40 WG1986337
1,2-Dibromoethane U 63.0 500 500 01/10/2023 21:40 WG1986337
Dibromomethane U 61.0 500 500 01/10/2023 21:40 WG1986337
1,2-Dichlorobenzene U 53.5 500 500 01/10/2023 21:40 WG1986337
1,3-Dichlorobenzene U 55.0 500 500 01/10/2023 21:40 WG1986337
1,4-Dichlorobenzene U 60.0 500 500 01/10/2023 21:40 WG1986337
Dichlorodifluoromethane U 187 2500 500 01/10/2023 21:40 WG1986337
1,1-Dichloroethane U 50.0 500 500 01/10/2023 21:40 WG1986337
1,2-Dichloroethane U 40.9 500 500 01/10/2023 21:40 WG1986337
1,1-Dichloroethene U 94.0 500 500 01/10/2023 21:40 WG1986337
cis-1,2-Dichloroethene U 63.0 500 500 01/10/2023 21:40 WG1986337
trans-1,2-Dichloroethene U 74.5 500 500 01/10/2023 21:40 WG1986337
1,2-Dichloropropane U 74.5 500 500 01/10/2023 21:40 WG1986337
1,1-Dichloropropene U 71.0 500 500 01/10/2023 21:40 WG1986337
1,3-Dichloropropane U 55.0 500 500 01/10/2023 21:40 WG1986337
2,2-Dichloropropane U 80.5 500 500 01/10/2023 21:40 WG1986337
Di-isopropyl ether 181 J 52.5 500 500 01/10/2023 21:40 WG1986337
Ethylbenzene 540 68.5 500 500 01/10/2023 21:40 WG1986337
Hexachloro-1,3-butadiene U 169 500 500 01/10/2023 21:40 WG1986337
Isopropylbenzene 61.2 J 52.5 500 500 01/10/2023 21:40 WG1986337
p-Isopropyltoluene U 60.0 500 500 01/10/2023 21:40 WG1986337
2-Butanone (MEK)U 595 5000 500 01/10/2023 21:40 WG1986337
Methylene Chloride U 215 2500 500 01/10/2023 21:40 WG1986337
4-Methyl-2-pentanone (MIBK) U 239 5000 500 01/10/2023 21:40 WG1986337
Methyl tert-butyl ether 49200 50.5 500 500 01/10/2023 21:40 WG1986337
Naphthalene U 500 2500 500 01/10/2023 21:40 WG1986337
n-Propylbenzene 130 J 49.7 500 500 01/10/2023 21:40 WG1986337
Styrene U 59.0 500 500 01/10/2023 21:40 WG1986337
1,1,1,2-Tetrachloroethane U 73.5 500 500 01/10/2023 21:40 WG1986337
1,1,2,2-Tetrachloroethane U 66.5 500 500 01/10/2023 21:40 WG1986337
Tetrachloroethene U 150 500 500 01/10/2023 21:40 WG1986337
Toluene 6330 139 500 500 01/10/2023 21:40 WG1986337
1,2,3-Trichlorobenzene U 115 500 500 01/10/2023 21:40 WG1986337
1,2,4-Trichlorobenzene U 241 500 500 01/10/2023 21:40 WG1986337
1,1,1-Trichloroethane U 74.5 500 500 01/10/2023 21:40 WG1986337
1,1,2-Trichloroethane U 79.0 500 500 01/10/2023 21:40 WG1986337
Trichloroethene U 95.0 500 500 01/10/2023 21:40 WG1986337
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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SAMPLE RESULTS - 02
L1572616
MW-7
Collected date/time: 12/29/22 13:25
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 80.0 2500 500 01/10/2023 21:40 WG1986337
1,2,3-Trichloropropane U 119 1250 500 01/10/2023 21:40 WG1986337
1,2,4-Trimethylbenzene 1110 161 500 500 01/10/2023 21:40 WG1986337
1,3,5-Trimethylbenzene 344 J 52.0 500 500 01/10/2023 21:40 WG1986337
Vinyl chloride U 117 500 500 01/10/2023 21:40 WG1986337
o-Xylene 1750 87.0 500 500 01/10/2023 21:40 WG1986337
m&p-Xylenes 3660 215 1000 500 01/10/2023 21:40 WG1986337
(S) Toluene-d8 94.3 80.0-120 01/10/2023 21:40 WG1986337
(S) 4-Bromofluorobenzene 93.1 77.0-126 01/10/2023 21:40 WG1986337
(S) 1,2-Dichloroethane-d4 94.1 70.0-130 01/10/2023 21:40 WG1986337
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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SAMPLE RESULTS - 03
L1572616
MW-6
Collected date/time: 12/29/22 13:45
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone U 2260 10000 200 01/07/2023 16:27 WG1984826
Acrolein U 508 10000 200 01/07/2023 16:27 WG1984826
Acrylonitrile U 134 2000 200 01/07/2023 16:27 WG1984826
Benzene 215 B 18.8 200 200 01/07/2023 16:27 WG1984826
Bromobenzene U 23.6 200 200 01/07/2023 16:27 WG1984826
Bromodichloromethane U 27.2 200 200 01/07/2023 16:27 WG1984826
Bromoform U 25.8 200 200 01/07/2023 16:27 WG1984826
Bromomethane U 121 1000 200 01/07/2023 16:27 WG1984826
n-Butylbenzene U 31.4 200 200 01/07/2023 16:27 WG1984826
sec-Butylbenzene U 25.0 200 200 01/07/2023 16:27 WG1984826
tert-Butylbenzene U 25.4 200 200 01/07/2023 16:27 WG1984826
Carbon tetrachloride U 25.6 200 200 01/07/2023 16:27 WG1984826
Chlorobenzene U 23.2 200 200 01/07/2023 16:27 WG1984826
Chlorodibromomethane U 28.0 200 200 01/07/2023 16:27 WG1984826
Chloroethane U 38.4 1000 200 01/07/2023 16:27 WG1984826
Chloroform U 22.2 1000 200 01/07/2023 16:27 WG1984826
Chloromethane U 192 500 200 01/07/2023 16:27 WG1984826
2-Chlorotoluene U 21.2 200 200 01/07/2023 16:27 WG1984826
4-Chlorotoluene U 22.8 200 200 01/07/2023 16:27 WG1984826
1,2-Dibromo-3-Chloropropane U 55.2 1000 200 01/07/2023 16:27 WG1984826
1,2-Dibromoethane 68.9 J 25.2 200 200 01/07/2023 16:27 WG1984826
Dibromomethane U 24.4 200 200 01/07/2023 16:27 WG1984826
1,2-Dichlorobenzene U 21.4 200 200 01/07/2023 16:27 WG1984826
1,3-Dichlorobenzene U 22.0 200 200 01/07/2023 16:27 WG1984826
1,4-Dichlorobenzene U 24.0 200 200 01/07/2023 16:27 WG1984826
Dichlorodifluoromethane U 74.8 1000 200 01/07/2023 16:27 WG1984826
1,1-Dichloroethane U 20.0 200 200 01/07/2023 16:27 WG1984826
1,2-Dichloroethane U 16.4 200 200 01/07/2023 16:27 WG1984826
1,1-Dichloroethene U 37.6 200 200 01/07/2023 16:27 WG1984826
cis-1,2-Dichloroethene U 25.2 200 200 01/07/2023 16:27 WG1984826
trans-1,2-Dichloroethene U 29.8 200 200 01/07/2023 16:27 WG1984826
1,2-Dichloropropane U 29.8 200 200 01/07/2023 16:27 WG1984826
1,1-Dichloropropene U 28.4 200 200 01/07/2023 16:27 WG1984826
1,3-Dichloropropane U 22.0 200 200 01/07/2023 16:27 WG1984826
2,2-Dichloropropane U 32.2 200 200 01/07/2023 16:27 WG1984826
Di-isopropyl ether U 21.0 200 200 01/07/2023 16:27 WG1984826
Ethylbenzene 203 27.4 200 200 01/07/2023 16:27 WG1984826
Hexachloro-1,3-butadiene U 67.4 200 200 01/07/2023 16:27 WG1984826
Isopropylbenzene U 21.0 200 200 01/07/2023 16:27 WG1984826
p-Isopropyltoluene U 24.0 200 200 01/07/2023 16:27 WG1984826
2-Butanone (MEK)729 J 238 2000 200 01/07/2023 16:27 WG1984826
Methylene Chloride U 86.0 1000 200 01/07/2023 16:27 WG1984826
4-Methyl-2-pentanone (MIBK) 204 J 95.6 2000 200 01/07/2023 16:27 WG1984826
Methyl tert-butyl ether 13000 20.2 200 200 01/07/2023 16:27 WG1984826
Naphthalene 282 J 200 1000 200 01/07/2023 16:27 WG1984826
n-Propylbenzene 33.6 J 19.9 200 200 01/07/2023 16:27 WG1984826
Styrene U 23.6 200 200 01/07/2023 16:27 WG1984826
1,1,1,2-Tetrachloroethane U 29.4 200 200 01/07/2023 16:27 WG1984826
1,1,2,2-Tetrachloroethane U 26.6 200 200 01/07/2023 16:27 WG1984826
Tetrachloroethene U 60.0 200 200 01/07/2023 16:27 WG1984826
Toluene 664 55.6 200 200 01/07/2023 16:27 WG1984826
1,2,3-Trichlorobenzene U 46.0 200 200 01/07/2023 16:27 WG1984826
1,2,4-Trichlorobenzene U 96.2 200 200 01/07/2023 16:27 WG1984826
1,1,1-Trichloroethane U 29.8 200 200 01/07/2023 16:27 WG1984826
1,1,2-Trichloroethane U 31.6 200 200 01/07/2023 16:27 WG1984826
Trichloroethene U 38.0 200 200 01/07/2023 16:27 WG1984826
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:50 10 of 39
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:58 10 of 39
SAMPLE RESULTS - 03
L1572616
MW-6
Collected date/time: 12/29/22 13:45
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 32.0 1000 200 01/07/2023 16:27 WG1984826
1,2,3-Trichloropropane U 47.4 500 200 01/07/2023 16:27 WG1984826
1,2,4-Trimethylbenzene 554 64.4 200 200 01/07/2023 16:27 WG1984826
1,3,5-Trimethylbenzene 243 20.8 200 200 01/07/2023 16:27 WG1984826
Vinyl chloride U 46.8 200 200 01/07/2023 16:27 WG1984826
o-Xylene 568 34.8 200 200 01/07/2023 16:27 WG1984826
m&p-Xylenes 760 86.0 400 200 01/07/2023 16:27 WG1984826
(S) Toluene-d8 116 80.0-120 01/07/2023 16:27 WG1984826
(S) 4-Bromofluorobenzene 108 77.0-126 01/07/2023 16:27 WG1984826
(S) 1,2-Dichloroethane-d4 96.9 70.0-130 01/07/2023 16:27 WG1984826
Sample Narrative:
L1572616-03 WG1984826: Non-target compounds too high to run at a lower dilution.
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:50 11 of 39
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:58 11 of 39
SAMPLE RESULTS - 04
L1572616
MW-4
Collected date/time: 12/29/22 14:05
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone U 2820 12500 250 01/07/2023 16:47 WG1984826
Acrolein U 635 12500 250 01/07/2023 16:47 WG1984826
Acrylonitrile U 168 2500 250 01/07/2023 16:47 WG1984826
Benzene 153 B J 23.5 250 250 01/07/2023 16:47 WG1984826
Bromobenzene U 29.5 250 250 01/07/2023 16:47 WG1984826
Bromodichloromethane U 34.0 250 250 01/07/2023 16:47 WG1984826
Bromoform U 32.3 250 250 01/07/2023 16:47 WG1984826
Bromomethane U 151 1250 250 01/07/2023 16:47 WG1984826
n-Butylbenzene U 39.3 250 250 01/07/2023 16:47 WG1984826
sec-Butylbenzene U 31.3 250 250 01/07/2023 16:47 WG1984826
tert-Butylbenzene U 31.8 250 250 01/07/2023 16:47 WG1984826
Carbon tetrachloride U 32.0 250 250 01/07/2023 16:47 WG1984826
Chlorobenzene U 29.0 250 250 01/07/2023 16:47 WG1984826
Chlorodibromomethane U 35.0 250 250 01/07/2023 16:47 WG1984826
Chloroethane U 48.0 1250 250 01/07/2023 16:47 WG1984826
Chloroform U 27.8 1250 250 01/07/2023 16:47 WG1984826
Chloromethane U 240 625 250 01/07/2023 16:47 WG1984826
2-Chlorotoluene U 26.5 250 250 01/07/2023 16:47 WG1984826
4-Chlorotoluene U 28.5 250 250 01/07/2023 16:47 WG1984826
1,2-Dibromo-3-Chloropropane U 69.0 1250 250 01/07/2023 16:47 WG1984826
1,2-Dibromoethane U 31.5 250 250 01/07/2023 16:47 WG1984826
Dibromomethane U 30.5 250 250 01/07/2023 16:47 WG1984826
1,2-Dichlorobenzene U 26.8 250 250 01/07/2023 16:47 WG1984826
1,3-Dichlorobenzene U 27.5 250 250 01/07/2023 16:47 WG1984826
1,4-Dichlorobenzene U 30.0 250 250 01/07/2023 16:47 WG1984826
Dichlorodifluoromethane U 93.5 1250 250 01/07/2023 16:47 WG1984826
1,1-Dichloroethane U 25.0 250 250 01/07/2023 16:47 WG1984826
1,2-Dichloroethane U 20.5 250 250 01/07/2023 16:47 WG1984826
1,1-Dichloroethene U 47.0 250 250 01/07/2023 16:47 WG1984826
cis-1,2-Dichloroethene U 31.5 250 250 01/07/2023 16:47 WG1984826
trans-1,2-Dichloroethene U 37.3 250 250 01/07/2023 16:47 WG1984826
1,2-Dichloropropane U 37.3 250 250 01/07/2023 16:47 WG1984826
1,1-Dichloropropene U 35.5 250 250 01/07/2023 16:47 WG1984826
1,3-Dichloropropane U 27.5 250 250 01/07/2023 16:47 WG1984826
2,2-Dichloropropane U 40.3 250 250 01/07/2023 16:47 WG1984826
Di-isopropyl ether U 26.3 250 250 01/07/2023 16:47 WG1984826
Ethylbenzene 997 34.3 250 250 01/07/2023 16:47 WG1984826
Hexachloro-1,3-butadiene U 84.3 250 250 01/07/2023 16:47 WG1984826
Isopropylbenzene 43.4 J 26.3 250 250 01/07/2023 16:47 WG1984826
p-Isopropyltoluene U 30.0 250 250 01/07/2023 16:47 WG1984826
2-Butanone (MEK)U 298 2500 250 01/07/2023 16:47 WG1984826
Methylene Chloride U 108 1250 250 01/07/2023 16:47 WG1984826
4-Methyl-2-pentanone (MIBK) U 120 2500 250 01/07/2023 16:47 WG1984826
Methyl tert-butyl ether 57.0 J 25.3 250 250 01/07/2023 16:47 WG1984826
Naphthalene 402 J 250 1250 250 01/07/2023 16:47 WG1984826
n-Propylbenzene 98.9 J 24.8 250 250 01/07/2023 16:47 WG1984826
Styrene 35.9 J 29.5 250 250 01/07/2023 16:47 WG1984826
1,1,1,2-Tetrachloroethane U 36.8 250 250 01/07/2023 16:47 WG1984826
1,1,2,2-Tetrachloroethane U 33.3 250 250 01/07/2023 16:47 WG1984826
Tetrachloroethene U 75.0 250 250 01/07/2023 16:47 WG1984826
Toluene 5560 69.5 250 250 01/07/2023 16:47 WG1984826
1,2,3-Trichlorobenzene U 57.5 250 250 01/07/2023 16:47 WG1984826
1,2,4-Trichlorobenzene U 120 250 250 01/07/2023 16:47 WG1984826
1,1,1-Trichloroethane U 37.3 250 250 01/07/2023 16:47 WG1984826
1,1,2-Trichloroethane U 39.5 250 250 01/07/2023 16:47 WG1984826
Trichloroethene U 47.5 250 250 01/07/2023 16:47 WG1984826
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:50 12 of 39
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:58 12 of 39
SAMPLE RESULTS - 04
L1572616
MW-4
Collected date/time: 12/29/22 14:05
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 40.0 1250 250 01/07/2023 16:47 WG1984826
1,2,3-Trichloropropane U 59.3 625 250 01/07/2023 16:47 WG1984826
1,2,4-Trimethylbenzene 1070 80.5 250 250 01/07/2023 16:47 WG1984826
1,3,5-Trimethylbenzene 337 26.0 250 250 01/07/2023 16:47 WG1984826
Vinyl chloride U 58.5 250 250 01/07/2023 16:47 WG1984826
o-Xylene 2050 43.5 250 250 01/07/2023 16:47 WG1984826
m&p-Xylenes 4370 108 500 250 01/07/2023 16:47 WG1984826
(S) Toluene-d8 110 80.0-120 01/07/2023 16:47 WG1984826
(S) 4-Bromofluorobenzene 104 77.0-126 01/07/2023 16:47 WG1984826
(S) 1,2-Dichloroethane-d4 96.2 70.0-130 01/07/2023 16:47 WG1984826
Sample Narrative:
L1572616-04 WG1984826: Non-target compounds too high to run at a lower dilution.
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:50 13 of 39
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:58 13 of 39
SAMPLE RESULTS - 05
L1572616
MW-4R
Collected date/time: 12/29/22 14:25
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone U 1130 5000 100 01/07/2023 17:06 WG1984826
Acrolein U 254 5000 100 01/07/2023 17:06 WG1984826
Acrylonitrile U 67.1 1000 100 01/07/2023 17:06 WG1984826
Benzene 342 9.41 100 100 01/07/2023 17:06 WG1984826
Bromobenzene U 11.8 100 100 01/07/2023 17:06 WG1984826
Bromodichloromethane U 13.6 100 100 01/07/2023 17:06 WG1984826
Bromoform U 12.9 100 100 01/07/2023 17:06 WG1984826
Bromomethane U 60.5 500 100 01/07/2023 17:06 WG1984826
n-Butylbenzene 25.6 J 15.7 100 100 01/07/2023 17:06 WG1984826
sec-Butylbenzene 18.4 J 12.5 100 100 01/07/2023 17:06 WG1984826
tert-Butylbenzene U 12.7 100 100 01/07/2023 17:06 WG1984826
Carbon tetrachloride U 12.8 100 100 01/07/2023 17:06 WG1984826
Chlorobenzene U 11.6 100 100 01/07/2023 17:06 WG1984826
Chlorodibromomethane U 14.0 100 100 01/07/2023 17:06 WG1984826
Chloroethane U 19.2 500 100 01/07/2023 17:06 WG1984826
Chloroform U 11.1 500 100 01/07/2023 17:06 WG1984826
Chloromethane U 96.0 250 100 01/07/2023 17:06 WG1984826
2-Chlorotoluene U 10.6 100 100 01/07/2023 17:06 WG1984826
4-Chlorotoluene U 11.4 100 100 01/07/2023 17:06 WG1984826
1,2-Dibromo-3-Chloropropane U 27.6 500 100 01/07/2023 17:06 WG1984826
1,2-Dibromoethane 23.4 J 12.6 100 100 01/07/2023 17:06 WG1984826
Dibromomethane U 12.2 100 100 01/07/2023 17:06 WG1984826
1,2-Dichlorobenzene U 10.7 100 100 01/07/2023 17:06 WG1984826
1,3-Dichlorobenzene U 11.0 100 100 01/07/2023 17:06 WG1984826
1,4-Dichlorobenzene U 12.0 100 100 01/07/2023 17:06 WG1984826
Dichlorodifluoromethane U 37.4 500 100 01/07/2023 17:06 WG1984826
1,1-Dichloroethane U 10.0 100 100 01/07/2023 17:06 WG1984826
1,2-Dichloroethane U 8.19 100 100 01/07/2023 17:06 WG1984826
1,1-Dichloroethene U 18.8 100 100 01/07/2023 17:06 WG1984826
cis-1,2-Dichloroethene U 12.6 100 100 01/07/2023 17:06 WG1984826
trans-1,2-Dichloroethene U 14.9 100 100 01/07/2023 17:06 WG1984826
1,2-Dichloropropane U 14.9 100 100 01/07/2023 17:06 WG1984826
1,1-Dichloropropene U 14.2 100 100 01/07/2023 17:06 WG1984826
1,3-Dichloropropane U 11.0 100 100 01/07/2023 17:06 WG1984826
2,2-Dichloropropane U 16.1 100 100 01/07/2023 17:06 WG1984826
Di-isopropyl ether U 10.5 100 100 01/07/2023 17:06 WG1984826
Ethylbenzene 2670 13.7 100 100 01/07/2023 17:06 WG1984826
Hexachloro-1,3-butadiene U 33.7 100 100 01/07/2023 17:06 WG1984826
Isopropylbenzene 103 10.5 100 100 01/07/2023 17:06 WG1984826
p-Isopropyltoluene 36.9 J 12.0 100 100 01/07/2023 17:06 WG1984826
2-Butanone (MEK)U 119 1000 100 01/07/2023 17:06 WG1984826
Methylene Chloride U 43.0 500 100 01/07/2023 17:06 WG1984826
4-Methyl-2-pentanone (MIBK) U 47.8 1000 100 01/07/2023 17:06 WG1984826
Methyl tert-butyl ether 28.7 J 10.1 100 100 01/07/2023 17:06 WG1984826
Naphthalene 905 100 500 100 01/07/2023 17:06 WG1984826
n-Propylbenzene 238 9.93 100 100 01/07/2023 17:06 WG1984826
Styrene 76.4 J 11.8 100 100 01/07/2023 17:06 WG1984826
1,1,1,2-Tetrachloroethane U 14.7 100 100 01/07/2023 17:06 WG1984826
1,1,2,2-Tetrachloroethane U 13.3 100 100 01/07/2023 17:06 WG1984826
Tetrachloroethene U 30.0 100 100 01/07/2023 17:06 WG1984826
Toluene 9530 27.8 100 100 01/07/2023 17:06 WG1984826
1,2,3-Trichlorobenzene U 23.0 100 100 01/07/2023 17:06 WG1984826
1,2,4-Trichlorobenzene U 48.1 100 100 01/07/2023 17:06 WG1984826
1,1,1-Trichloroethane U 14.9 100 100 01/07/2023 17:06 WG1984826
1,1,2-Trichloroethane U 15.8 100 100 01/07/2023 17:06 WG1984826
Trichloroethene U 19.0 100 100 01/07/2023 17:06 WG1984826
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:50 14 of 39
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:58 14 of 39
SAMPLE RESULTS - 05
L1572616
MW-4R
Collected date/time: 12/29/22 14:25
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 16.0 500 100 01/07/2023 17:06 WG1984826
1,2,3-Trichloropropane U 23.7 250 100 01/07/2023 17:06 WG1984826
1,2,4-Trimethylbenzene 2260 32.2 100 100 01/07/2023 17:06 WG1984826
1,3,5-Trimethylbenzene 590 10.4 100 100 01/07/2023 17:06 WG1984826
Vinyl chloride U 23.4 100 100 01/07/2023 17:06 WG1984826
o-Xylene 4750 17.4 100 100 01/07/2023 17:06 WG1984826
m&p-Xylenes 10600 43.0 200 100 01/07/2023 17:06 WG1984826
(S) Toluene-d8 113 80.0-120 01/07/2023 17:06 WG1984826
(S) 4-Bromofluorobenzene 106 77.0-126 01/07/2023 17:06 WG1984826
(S) 1,2-Dichloroethane-d4 98.9 70.0-130 01/07/2023 17:06 WG1984826
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:50 15 of 39
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:58 15 of 39
SAMPLE RESULTS - 06
L1572616
MW-2R
Collected date/time: 12/29/22 14:50
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone U 11300 50000 1000 01/07/2023 17:25 WG1984826
Acrolein U 2540 50000 1000 01/07/2023 17:25 WG1984826
Acrylonitrile U 671 10000 1000 01/07/2023 17:25 WG1984826
Benzene 11400 94.1 1000 1000 01/07/2023 17:25 WG1984826
Bromobenzene U 118 1000 1000 01/07/2023 17:25 WG1984826
Bromodichloromethane U 136 1000 1000 01/07/2023 17:25 WG1984826
Bromoform U 129 1000 1000 01/07/2023 17:25 WG1984826
Bromomethane U 605 5000 1000 01/07/2023 17:25 WG1984826
n-Butylbenzene U 157 1000 1000 01/07/2023 17:25 WG1984826
sec-Butylbenzene U 125 1000 1000 01/07/2023 17:25 WG1984826
tert-Butylbenzene U 127 1000 1000 01/07/2023 17:25 WG1984826
Carbon tetrachloride U 128 1000 1000 01/07/2023 17:25 WG1984826
Chlorobenzene U 116 1000 1000 01/07/2023 17:25 WG1984826
Chlorodibromomethane U 140 1000 1000 01/07/2023 17:25 WG1984826
Chloroethane U 192 5000 1000 01/07/2023 17:25 WG1984826
Chloroform U 111 5000 1000 01/07/2023 17:25 WG1984826
Chloromethane U 960 2500 1000 01/07/2023 17:25 WG1984826
2-Chlorotoluene U 106 1000 1000 01/07/2023 17:25 WG1984826
4-Chlorotoluene U 114 1000 1000 01/07/2023 17:25 WG1984826
1,2-Dibromo-3-Chloropropane U 276 5000 1000 01/07/2023 17:25 WG1984826
1,2-Dibromoethane U 126 1000 1000 01/07/2023 17:25 WG1984826
Dibromomethane U 122 1000 1000 01/07/2023 17:25 WG1984826
1,2-Dichlorobenzene U 107 1000 1000 01/07/2023 17:25 WG1984826
1,3-Dichlorobenzene U 110 1000 1000 01/07/2023 17:25 WG1984826
1,4-Dichlorobenzene U 120 1000 1000 01/07/2023 17:25 WG1984826
Dichlorodifluoromethane U 374 5000 1000 01/07/2023 17:25 WG1984826
1,1-Dichloroethane U 100 1000 1000 01/07/2023 17:25 WG1984826
1,2-Dichloroethane U 81.9 1000 1000 01/07/2023 17:25 WG1984826
1,1-Dichloroethene U 188 1000 1000 01/07/2023 17:25 WG1984826
cis-1,2-Dichloroethene U 126 1000 1000 01/07/2023 17:25 WG1984826
trans-1,2-Dichloroethene U 149 1000 1000 01/07/2023 17:25 WG1984826
1,2-Dichloropropane U 149 1000 1000 01/07/2023 17:25 WG1984826
1,1-Dichloropropene U 142 1000 1000 01/07/2023 17:25 WG1984826
1,3-Dichloropropane U 110 1000 1000 01/07/2023 17:25 WG1984826
2,2-Dichloropropane U 161 1000 1000 01/07/2023 17:25 WG1984826
Di-isopropyl ether 324 J 105 1000 1000 01/07/2023 17:25 WG1984826
Ethylbenzene 5810 137 1000 1000 01/07/2023 17:25 WG1984826
Hexachloro-1,3-butadiene U 337 1000 1000 01/07/2023 17:25 WG1984826
Isopropylbenzene 302 J 105 1000 1000 01/07/2023 17:25 WG1984826
p-Isopropyltoluene 180 J 120 1000 1000 01/07/2023 17:25 WG1984826
2-Butanone (MEK)U 1190 10000 1000 01/07/2023 17:25 WG1984826
Methylene Chloride U 430 5000 1000 01/07/2023 17:25 WG1984826
4-Methyl-2-pentanone (MIBK) U 478 10000 1000 01/07/2023 17:25 WG1984826
Methyl tert-butyl ether 123000 101 1000 1000 01/07/2023 17:25 WG1984826
Naphthalene 1590 J 1000 5000 1000 01/07/2023 17:25 WG1984826
n-Propylbenzene 809 J 99.3 1000 1000 01/07/2023 17:25 WG1984826
Styrene U 118 1000 1000 01/07/2023 17:25 WG1984826
1,1,1,2-Tetrachloroethane U 147 1000 1000 01/07/2023 17:25 WG1984826
1,1,2,2-Tetrachloroethane U 133 1000 1000 01/07/2023 17:25 WG1984826
Tetrachloroethene U 300 1000 1000 01/07/2023 17:25 WG1984826
Toluene 55800 278 1000 1000 01/07/2023 17:25 WG1984826
1,2,3-Trichlorobenzene U 230 1000 1000 01/07/2023 17:25 WG1984826
1,2,4-Trichlorobenzene U 481 1000 1000 01/07/2023 17:25 WG1984826
1,1,1-Trichloroethane U 149 1000 1000 01/07/2023 17:25 WG1984826
1,1,2-Trichloroethane U 158 1000 1000 01/07/2023 17:25 WG1984826
Trichloroethene U 190 1000 1000 01/07/2023 17:25 WG1984826
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:50 16 of 39
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:58 16 of 39
SAMPLE RESULTS - 06
L1572616
MW-2R
Collected date/time: 12/29/22 14:50
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 160 5000 1000 01/07/2023 17:25 WG1984826
1,2,3-Trichloropropane U 237 2500 1000 01/07/2023 17:25 WG1984826
1,2,4-Trimethylbenzene 4830 322 1000 1000 01/07/2023 17:25 WG1984826
1,3,5-Trimethylbenzene 1290 104 1000 1000 01/07/2023 17:25 WG1984826
Vinyl chloride U 234 1000 1000 01/07/2023 17:25 WG1984826
o-Xylene 8950 174 1000 1000 01/07/2023 17:25 WG1984826
m&p-Xylenes 19200 430 2000 1000 01/07/2023 17:25 WG1984826
(S) Toluene-d8 113 80.0-120 01/07/2023 17:25 WG1984826
(S) 4-Bromofluorobenzene 107 77.0-126 01/07/2023 17:25 WG1984826
(S) 1,2-Dichloroethane-d4 98.3 70.0-130 01/07/2023 17:25 WG1984826
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:50 17 of 39
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:58 17 of 39
SAMPLE RESULTS - 07
L1572616
MW-11
Collected date/time: 12/29/22 16:25
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone U 11.3 50.0 1 01/07/2023 13:54 WG1984826
Acrolein U 2.54 50.0 1 01/07/2023 13:54 WG1984826
Acrylonitrile U 0.671 10.0 1 01/07/2023 13:54 WG1984826
Benzene U 0.0941 1.00 1 01/07/2023 13:54 WG1984826
Bromobenzene U 0.118 1.00 1 01/07/2023 13:54 WG1984826
Bromodichloromethane U 0.136 1.00 1 01/07/2023 13:54 WG1984826
Bromoform U 0.129 1.00 1 01/07/2023 13:54 WG1984826
Bromomethane U 0.605 5.00 1 01/07/2023 13:54 WG1984826
n-Butylbenzene U 0.157 1.00 1 01/07/2023 13:54 WG1984826
sec-Butylbenzene U 0.125 1.00 1 01/07/2023 13:54 WG1984826
tert-Butylbenzene U 0.127 1.00 1 01/07/2023 13:54 WG1984826
Carbon tetrachloride U 0.128 1.00 1 01/07/2023 13:54 WG1984826
Chlorobenzene U 0.116 1.00 1 01/07/2023 13:54 WG1984826
Chlorodibromomethane U 0.140 1.00 1 01/07/2023 13:54 WG1984826
Chloroethane U 0.192 5.00 1 01/07/2023 13:54 WG1984826
Chloroform U 0.111 5.00 1 01/07/2023 13:54 WG1984826
Chloromethane U 0.960 2.50 1 01/07/2023 13:54 WG1984826
2-Chlorotoluene U 0.106 1.00 1 01/07/2023 13:54 WG1984826
4-Chlorotoluene U 0.114 1.00 1 01/07/2023 13:54 WG1984826
1,2-Dibromo-3-Chloropropane U 0.276 5.00 1 01/07/2023 13:54 WG1984826
1,2-Dibromoethane U 0.126 1.00 1 01/07/2023 13:54 WG1984826
Dibromomethane U 0.122 1.00 1 01/07/2023 13:54 WG1984826
1,2-Dichlorobenzene U 0.107 1.00 1 01/07/2023 13:54 WG1984826
1,3-Dichlorobenzene U 0.110 1.00 1 01/07/2023 13:54 WG1984826
1,4-Dichlorobenzene U 0.120 1.00 1 01/07/2023 13:54 WG1984826
Dichlorodifluoromethane U 0.374 5.00 1 01/07/2023 13:54 WG1984826
1,1-Dichloroethane U 0.100 1.00 1 01/07/2023 13:54 WG1984826
1,2-Dichloroethane U 0.0819 1.00 1 01/07/2023 13:54 WG1984826
1,1-Dichloroethene U 0.188 1.00 1 01/07/2023 13:54 WG1984826
cis-1,2-Dichloroethene U 0.126 1.00 1 01/07/2023 13:54 WG1984826
trans-1,2-Dichloroethene U 0.149 1.00 1 01/07/2023 13:54 WG1984826
1,2-Dichloropropane U 0.149 1.00 1 01/07/2023 13:54 WG1984826
1,1-Dichloropropene U 0.142 1.00 1 01/07/2023 13:54 WG1984826
1,3-Dichloropropane U 0.110 1.00 1 01/07/2023 13:54 WG1984826
2,2-Dichloropropane U 0.161 1.00 1 01/07/2023 13:54 WG1984826
Di-isopropyl ether U 0.105 1.00 1 01/07/2023 13:54 WG1984826
Ethylbenzene U 0.137 1.00 1 01/07/2023 13:54 WG1984826
Hexachloro-1,3-butadiene U 0.337 1.00 1 01/07/2023 13:54 WG1984826
Isopropylbenzene U 0.105 1.00 1 01/07/2023 13:54 WG1984826
p-Isopropyltoluene U 0.120 1.00 1 01/07/2023 13:54 WG1984826
2-Butanone (MEK)U 1.19 10.0 1 01/07/2023 13:54 WG1984826
Methylene Chloride U 0.430 5.00 1 01/07/2023 13:54 WG1984826
4-Methyl-2-pentanone (MIBK) U 0.478 10.0 1 01/07/2023 13:54 WG1984826
Methyl tert-butyl ether 0.774 J 0.101 1.00 1 01/07/2023 13:54 WG1984826
Naphthalene U 1.00 5.00 1 01/07/2023 13:54 WG1984826
n-Propylbenzene U 0.0993 1.00 1 01/07/2023 13:54 WG1984826
Styrene U 0.118 1.00 1 01/07/2023 13:54 WG1984826
1,1,1,2-Tetrachloroethane U 0.147 1.00 1 01/07/2023 13:54 WG1984826
1,1,2,2-Tetrachloroethane U 0.133 1.00 1 01/07/2023 13:54 WG1984826
Tetrachloroethene U 0.300 1.00 1 01/07/2023 13:54 WG1984826
Toluene U 0.278 1.00 1 01/07/2023 13:54 WG1984826
1,2,3-Trichlorobenzene U 0.230 1.00 1 01/07/2023 13:54 WG1984826
1,2,4-Trichlorobenzene U 0.481 1.00 1 01/07/2023 13:54 WG1984826
1,1,1-Trichloroethane U 0.149 1.00 1 01/07/2023 13:54 WG1984826
1,1,2-Trichloroethane U 0.158 1.00 1 01/07/2023 13:54 WG1984826
Trichloroethene U 0.190 1.00 1 01/07/2023 13:54 WG1984826
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:50 18 of 39
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:58 18 of 39
SAMPLE RESULTS - 07
L1572616
MW-11
Collected date/time: 12/29/22 16:25
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 0.160 5.00 1 01/07/2023 13:54 WG1984826
1,2,3-Trichloropropane U 0.237 2.50 1 01/07/2023 13:54 WG1984826
1,2,4-Trimethylbenzene U 0.322 1.00 1 01/07/2023 13:54 WG1984826
1,3,5-Trimethylbenzene U 0.104 1.00 1 01/07/2023 13:54 WG1984826
Vinyl chloride U 0.234 1.00 1 01/07/2023 13:54 WG1984826
o-Xylene U 0.174 1.00 1 01/07/2023 13:54 WG1984826
m&p-Xylenes U 0.430 2.00 1 01/07/2023 13:54 WG1984826
(S) Toluene-d8 117 80.0-120 01/07/2023 13:54 WG1984826
(S) 4-Bromofluorobenzene 106 77.0-126 01/07/2023 13:54 WG1984826
(S) 1,2-Dichloroethane-d4 92.9 70.0-130 01/07/2023 13:54 WG1984826
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:50 19 of 39
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:58 19 of 39
SAMPLE RESULTS - 08
L1572616
MW-13
Collected date/time: 12/29/22 15:50
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone U 11.3 50.0 1 01/07/2023 14:13 WG1984826
Acrolein U 2.54 50.0 1 01/07/2023 14:13 WG1984826
Acrylonitrile U 0.671 10.0 1 01/07/2023 14:13 WG1984826
Benzene U 0.0941 1.00 1 01/07/2023 14:13 WG1984826
Bromobenzene U 0.118 1.00 1 01/07/2023 14:13 WG1984826
Bromodichloromethane U 0.136 1.00 1 01/07/2023 14:13 WG1984826
Bromoform U 0.129 1.00 1 01/07/2023 14:13 WG1984826
Bromomethane U 0.605 5.00 1 01/07/2023 14:13 WG1984826
n-Butylbenzene U 0.157 1.00 1 01/07/2023 14:13 WG1984826
sec-Butylbenzene U 0.125 1.00 1 01/07/2023 14:13 WG1984826
tert-Butylbenzene U 0.127 1.00 1 01/07/2023 14:13 WG1984826
Carbon tetrachloride U 0.128 1.00 1 01/07/2023 14:13 WG1984826
Chlorobenzene U 0.116 1.00 1 01/07/2023 14:13 WG1984826
Chlorodibromomethane U 0.140 1.00 1 01/07/2023 14:13 WG1984826
Chloroethane U 0.192 5.00 1 01/07/2023 14:13 WG1984826
Chloroform U 0.111 5.00 1 01/07/2023 14:13 WG1984826
Chloromethane U 0.960 2.50 1 01/07/2023 14:13 WG1984826
2-Chlorotoluene U 0.106 1.00 1 01/07/2023 14:13 WG1984826
4-Chlorotoluene U 0.114 1.00 1 01/07/2023 14:13 WG1984826
1,2-Dibromo-3-Chloropropane U 0.276 5.00 1 01/07/2023 14:13 WG1984826
1,2-Dibromoethane U 0.126 1.00 1 01/07/2023 14:13 WG1984826
Dibromomethane U 0.122 1.00 1 01/07/2023 14:13 WG1984826
1,2-Dichlorobenzene U 0.107 1.00 1 01/07/2023 14:13 WG1984826
1,3-Dichlorobenzene U 0.110 1.00 1 01/07/2023 14:13 WG1984826
1,4-Dichlorobenzene U 0.120 1.00 1 01/07/2023 14:13 WG1984826
Dichlorodifluoromethane U 0.374 5.00 1 01/07/2023 14:13 WG1984826
1,1-Dichloroethane U 0.100 1.00 1 01/07/2023 14:13 WG1984826
1,2-Dichloroethane U 0.0819 1.00 1 01/07/2023 14:13 WG1984826
1,1-Dichloroethene U 0.188 1.00 1 01/07/2023 14:13 WG1984826
cis-1,2-Dichloroethene U 0.126 1.00 1 01/07/2023 14:13 WG1984826
trans-1,2-Dichloroethene U 0.149 1.00 1 01/07/2023 14:13 WG1984826
1,2-Dichloropropane U 0.149 1.00 1 01/07/2023 14:13 WG1984826
1,1-Dichloropropene U 0.142 1.00 1 01/07/2023 14:13 WG1984826
1,3-Dichloropropane U 0.110 1.00 1 01/07/2023 14:13 WG1984826
2,2-Dichloropropane U 0.161 1.00 1 01/07/2023 14:13 WG1984826
Di-isopropyl ether U 0.105 1.00 1 01/07/2023 14:13 WG1984826
Ethylbenzene U 0.137 1.00 1 01/07/2023 14:13 WG1984826
Hexachloro-1,3-butadiene U 0.337 1.00 1 01/07/2023 14:13 WG1984826
Isopropylbenzene U 0.105 1.00 1 01/07/2023 14:13 WG1984826
p-Isopropyltoluene U 0.120 1.00 1 01/07/2023 14:13 WG1984826
2-Butanone (MEK)U 1.19 10.0 1 01/07/2023 14:13 WG1984826
Methylene Chloride U 0.430 5.00 1 01/07/2023 14:13 WG1984826
4-Methyl-2-pentanone (MIBK) U 0.478 10.0 1 01/07/2023 14:13 WG1984826
Methyl tert-butyl ether U 0.101 1.00 1 01/07/2023 14:13 WG1984826
Naphthalene U 1.00 5.00 1 01/07/2023 14:13 WG1984826
n-Propylbenzene U 0.0993 1.00 1 01/07/2023 14:13 WG1984826
Styrene U 0.118 1.00 1 01/07/2023 14:13 WG1984826
1,1,1,2-Tetrachloroethane U 0.147 1.00 1 01/07/2023 14:13 WG1984826
1,1,2,2-Tetrachloroethane U 0.133 1.00 1 01/07/2023 14:13 WG1984826
Tetrachloroethene U 0.300 1.00 1 01/07/2023 14:13 WG1984826
Toluene U 0.278 1.00 1 01/07/2023 14:13 WG1984826
1,2,3-Trichlorobenzene U 0.230 1.00 1 01/07/2023 14:13 WG1984826
1,2,4-Trichlorobenzene U 0.481 1.00 1 01/07/2023 14:13 WG1984826
1,1,1-Trichloroethane U 0.149 1.00 1 01/07/2023 14:13 WG1984826
1,1,2-Trichloroethane U 0.158 1.00 1 01/07/2023 14:13 WG1984826
Trichloroethene U 0.190 1.00 1 01/07/2023 14:13 WG1984826
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:50 20 of 39
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:58 20 of 39
SAMPLE RESULTS - 08
L1572616
MW-13
Collected date/time: 12/29/22 15:50
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 0.160 5.00 1 01/07/2023 14:13 WG1984826
1,2,3-Trichloropropane U 0.237 2.50 1 01/07/2023 14:13 WG1984826
1,2,4-Trimethylbenzene U 0.322 1.00 1 01/07/2023 14:13 WG1984826
1,3,5-Trimethylbenzene U 0.104 1.00 1 01/07/2023 14:13 WG1984826
Vinyl chloride U 0.234 1.00 1 01/07/2023 14:13 WG1984826
o-Xylene U 0.174 1.00 1 01/07/2023 14:13 WG1984826
m&p-Xylenes U 0.430 2.00 1 01/07/2023 14:13 WG1984826
(S) Toluene-d8 116 80.0-120 01/07/2023 14:13 WG1984826
(S) 4-Bromofluorobenzene 105 77.0-126 01/07/2023 14:13 WG1984826
(S) 1,2-Dichloroethane-d4 92.4 70.0-130 01/07/2023 14:13 WG1984826
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:50 21 of 39
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:58 21 of 39
SAMPLE RESULTS - 09
L1572616
MW-9
Collected date/time: 12/29/22 15:30
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone U 2260 10000 200 01/07/2023 17:44 WG1984826
Acrolein U 508 10000 200 01/07/2023 17:44 WG1984826
Acrylonitrile U 134 2000 200 01/07/2023 17:44 WG1984826
Benzene 3370 18.8 200 200 01/07/2023 17:44 WG1984826
Bromobenzene U 23.6 200 200 01/07/2023 17:44 WG1984826
Bromodichloromethane U 27.2 200 200 01/07/2023 17:44 WG1984826
Bromoform U 25.8 200 200 01/07/2023 17:44 WG1984826
Bromomethane U 121 1000 200 01/07/2023 17:44 WG1984826
n-Butylbenzene U 31.4 200 200 01/07/2023 17:44 WG1984826
sec-Butylbenzene U 25.0 200 200 01/07/2023 17:44 WG1984826
tert-Butylbenzene U 25.4 200 200 01/07/2023 17:44 WG1984826
Carbon tetrachloride U 25.6 200 200 01/07/2023 17:44 WG1984826
Chlorobenzene U 23.2 200 200 01/07/2023 17:44 WG1984826
Chlorodibromomethane U 28.0 200 200 01/07/2023 17:44 WG1984826
Chloroethane U 38.4 1000 200 01/07/2023 17:44 WG1984826
Chloroform U 22.2 1000 200 01/07/2023 17:44 WG1984826
Chloromethane U 192 500 200 01/07/2023 17:44 WG1984826
2-Chlorotoluene U 21.2 200 200 01/07/2023 17:44 WG1984826
4-Chlorotoluene U 22.8 200 200 01/07/2023 17:44 WG1984826
1,2-Dibromo-3-Chloropropane U 55.2 1000 200 01/07/2023 17:44 WG1984826
1,2-Dibromoethane U 25.2 200 200 01/07/2023 17:44 WG1984826
Dibromomethane U 24.4 200 200 01/07/2023 17:44 WG1984826
1,2-Dichlorobenzene U 21.4 200 200 01/07/2023 17:44 WG1984826
1,3-Dichlorobenzene U 22.0 200 200 01/07/2023 17:44 WG1984826
1,4-Dichlorobenzene U 24.0 200 200 01/07/2023 17:44 WG1984826
Dichlorodifluoromethane U 74.8 1000 200 01/07/2023 17:44 WG1984826
1,1-Dichloroethane U 20.0 200 200 01/07/2023 17:44 WG1984826
1,2-Dichloroethane U 16.4 200 200 01/07/2023 17:44 WG1984826
1,1-Dichloroethene U 37.6 200 200 01/07/2023 17:44 WG1984826
cis-1,2-Dichloroethene U 25.2 200 200 01/07/2023 17:44 WG1984826
trans-1,2-Dichloroethene U 29.8 200 200 01/07/2023 17:44 WG1984826
1,2-Dichloropropane U 29.8 200 200 01/07/2023 17:44 WG1984826
1,1-Dichloropropene U 28.4 200 200 01/07/2023 17:44 WG1984826
1,3-Dichloropropane U 22.0 200 200 01/07/2023 17:44 WG1984826
2,2-Dichloropropane U 32.2 200 200 01/07/2023 17:44 WG1984826
Di-isopropyl ether U 21.0 200 200 01/07/2023 17:44 WG1984826
Ethylbenzene 105 J 27.4 200 200 01/07/2023 17:44 WG1984826
Hexachloro-1,3-butadiene U 67.4 200 200 01/07/2023 17:44 WG1984826
Isopropylbenzene 30.4 J 21.0 200 200 01/07/2023 17:44 WG1984826
p-Isopropyltoluene U 24.0 200 200 01/07/2023 17:44 WG1984826
2-Butanone (MEK)U 238 2000 200 01/07/2023 17:44 WG1984826
Methylene Chloride U 86.0 1000 200 01/07/2023 17:44 WG1984826
4-Methyl-2-pentanone (MIBK) U 95.6 2000 200 01/07/2023 17:44 WG1984826
Methyl tert-butyl ether 73.9 J 20.2 200 200 01/07/2023 17:44 WG1984826
Naphthalene U 200 1000 200 01/07/2023 17:44 WG1984826
n-Propylbenzene 24.8 J 19.9 200 200 01/07/2023 17:44 WG1984826
Styrene U 23.6 200 200 01/07/2023 17:44 WG1984826
1,1,1,2-Tetrachloroethane U 29.4 200 200 01/07/2023 17:44 WG1984826
1,1,2,2-Tetrachloroethane U 26.6 200 200 01/07/2023 17:44 WG1984826
Tetrachloroethene U 60.0 200 200 01/07/2023 17:44 WG1984826
Toluene 134 J 55.6 200 200 01/07/2023 17:44 WG1984826
1,2,3-Trichlorobenzene U 46.0 200 200 01/07/2023 17:44 WG1984826
1,2,4-Trichlorobenzene U 96.2 200 200 01/07/2023 17:44 WG1984826
1,1,1-Trichloroethane U 29.8 200 200 01/07/2023 17:44 WG1984826
1,1,2-Trichloroethane U 31.6 200 200 01/07/2023 17:44 WG1984826
Trichloroethene U 38.0 200 200 01/07/2023 17:44 WG1984826
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:50 22 of 39
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:58 22 of 39
SAMPLE RESULTS - 09
L1572616
MW-9
Collected date/time: 12/29/22 15:30
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 32.0 1000 200 01/07/2023 17:44 WG1984826
1,2,3-Trichloropropane U 47.4 500 200 01/07/2023 17:44 WG1984826
1,2,4-Trimethylbenzene 197 J 64.4 200 200 01/07/2023 17:44 WG1984826
1,3,5-Trimethylbenzene 68.5 J 20.8 200 200 01/07/2023 17:44 WG1984826
Vinyl chloride U 46.8 200 200 01/07/2023 17:44 WG1984826
o-Xylene 636 34.8 200 200 01/07/2023 17:44 WG1984826
m&p-Xylenes 1130 86.0 400 200 01/07/2023 17:44 WG1984826
(S) Toluene-d8 117 80.0-120 01/07/2023 17:44 WG1984826
(S) 4-Bromofluorobenzene 105 77.0-126 01/07/2023 17:44 WG1984826
(S) 1,2-Dichloroethane-d4 97.7 70.0-130 01/07/2023 17:44 WG1984826
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:50 23 of 39
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:58 23 of 39
SAMPLE RESULTS - 10
L1572616
MW-10
Collected date/time: 12/29/22 15:05
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone U 113 500 10 01/07/2023 18:03 WG1984826
Acrolein U 25.4 500 10 01/07/2023 18:03 WG1984826
Acrylonitrile U 6.71 100 10 01/07/2023 18:03 WG1984826
Benzene 124 0.941 10.0 10 01/07/2023 18:03 WG1984826
Bromobenzene U 1.18 10.0 10 01/07/2023 18:03 WG1984826
Bromodichloromethane U 1.36 10.0 10 01/07/2023 18:03 WG1984826
Bromoform U 1.29 10.0 10 01/07/2023 18:03 WG1984826
Bromomethane U 6.05 50.0 10 01/07/2023 18:03 WG1984826
n-Butylbenzene 2.97 J 1.57 10.0 10 01/07/2023 18:03 WG1984826
sec-Butylbenzene 4.66 J 1.25 10.0 10 01/07/2023 18:03 WG1984826
tert-Butylbenzene U 1.27 10.0 10 01/07/2023 18:03 WG1984826
Carbon tetrachloride U 1.28 10.0 10 01/07/2023 18:03 WG1984826
Chlorobenzene U 1.16 10.0 10 01/07/2023 18:03 WG1984826
Chlorodibromomethane U 1.40 10.0 10 01/07/2023 18:03 WG1984826
Chloroethane U 1.92 50.0 10 01/07/2023 18:03 WG1984826
Chloroform U 1.11 50.0 10 01/07/2023 18:03 WG1984826
Chloromethane U 9.60 25.0 10 01/07/2023 18:03 WG1984826
2-Chlorotoluene U 1.06 10.0 10 01/07/2023 18:03 WG1984826
4-Chlorotoluene U 1.14 10.0 10 01/07/2023 18:03 WG1984826
1,2-Dibromo-3-Chloropropane U 2.76 50.0 10 01/07/2023 18:03 WG1984826
1,2-Dibromoethane U 1.26 10.0 10 01/07/2023 18:03 WG1984826
Dibromomethane U 1.22 10.0 10 01/07/2023 18:03 WG1984826
1,2-Dichlorobenzene U 1.07 10.0 10 01/07/2023 18:03 WG1984826
1,3-Dichlorobenzene U 1.10 10.0 10 01/07/2023 18:03 WG1984826
1,4-Dichlorobenzene U 1.20 10.0 10 01/07/2023 18:03 WG1984826
Dichlorodifluoromethane U 3.74 50.0 10 01/07/2023 18:03 WG1984826
1,1-Dichloroethane U 1.00 10.0 10 01/07/2023 18:03 WG1984826
1,2-Dichloroethane U 0.819 10.0 10 01/07/2023 18:03 WG1984826
1,1-Dichloroethene U 1.88 10.0 10 01/07/2023 18:03 WG1984826
cis-1,2-Dichloroethene U 1.26 10.0 10 01/07/2023 18:03 WG1984826
trans-1,2-Dichloroethene U 1.49 10.0 10 01/07/2023 18:03 WG1984826
1,2-Dichloropropane U 1.49 10.0 10 01/07/2023 18:03 WG1984826
1,1-Dichloropropene U 1.42 10.0 10 01/07/2023 18:03 WG1984826
1,3-Dichloropropane U 1.10 10.0 10 01/07/2023 18:03 WG1984826
2,2-Dichloropropane U 1.61 10.0 10 01/07/2023 18:03 WG1984826
Di-isopropyl ether 3.85 J 1.05 10.0 10 01/07/2023 18:03 WG1984826
Ethylbenzene 103 1.37 10.0 10 01/07/2023 18:03 WG1984826
Hexachloro-1,3-butadiene U 3.37 10.0 10 01/07/2023 18:03 WG1984826
Isopropylbenzene 36.6 1.05 10.0 10 01/07/2023 18:03 WG1984826
p-Isopropyltoluene 6.87 J 1.20 10.0 10 01/07/2023 18:03 WG1984826
2-Butanone (MEK)U 11.9 100 10 01/07/2023 18:03 WG1984826
Methylene Chloride U 4.30 50.0 10 01/07/2023 18:03 WG1984826
4-Methyl-2-pentanone (MIBK) U 4.78 100 10 01/07/2023 18:03 WG1984826
Methyl tert-butyl ether 84.0 1.01 10.0 10 01/07/2023 18:03 WG1984826
Naphthalene 70.2 10.0 50.0 10 01/07/2023 18:03 WG1984826
n-Propylbenzene 16.8 0.993 10.0 10 01/07/2023 18:03 WG1984826
Styrene U 1.18 10.0 10 01/07/2023 18:03 WG1984826
1,1,1,2-Tetrachloroethane U 1.47 10.0 10 01/07/2023 18:03 WG1984826
1,1,2,2-Tetrachloroethane U 1.33 10.0 10 01/07/2023 18:03 WG1984826
Tetrachloroethene U 3.00 10.0 10 01/07/2023 18:03 WG1984826
Toluene 28.9 2.78 10.0 10 01/07/2023 18:03 WG1984826
1,2,3-Trichlorobenzene U 2.30 10.0 10 01/07/2023 18:03 WG1984826
1,2,4-Trichlorobenzene U 4.81 10.0 10 01/07/2023 18:03 WG1984826
1,1,1-Trichloroethane U 1.49 10.0 10 01/07/2023 18:03 WG1984826
1,1,2-Trichloroethane U 1.58 10.0 10 01/07/2023 18:03 WG1984826
Trichloroethene U 1.90 10.0 10 01/07/2023 18:03 WG1984826
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:58 24 of 39
SAMPLE RESULTS - 10
L1572616
MW-10
Collected date/time: 12/29/22 15:05
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 1.60 50.0 10 01/07/2023 18:03 WG1984826
1,2,3-Trichloropropane U 2.37 25.0 10 01/07/2023 18:03 WG1984826
1,2,4-Trimethylbenzene 218 3.22 10.0 10 01/07/2023 18:03 WG1984826
1,3,5-Trimethylbenzene 75.7 1.04 10.0 10 01/07/2023 18:03 WG1984826
Vinyl chloride U 2.34 10.0 10 01/07/2023 18:03 WG1984826
o-Xylene 380 1.74 10.0 10 01/07/2023 18:03 WG1984826
m&p-Xylenes 911 4.30 20.0 10 01/07/2023 18:03 WG1984826
(S) Toluene-d8 112 80.0-120 01/07/2023 18:03 WG1984826
(S) 4-Bromofluorobenzene 106 77.0-126 01/07/2023 18:03 WG1984826
(S) 1,2-Dichloroethane-d4 97.4 70.0-130 01/07/2023 18:03 WG1984826
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:58 25 of 39
SAMPLE RESULTS - 11
L1572616
TRIP BLANK
Collected date/time: 12/29/22 00:00
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone U 11.3 50.0 1 01/07/2023 13:16 WG1984826
Acrolein U 2.54 50.0 1 01/07/2023 13:16 WG1984826
Acrylonitrile U 0.671 10.0 1 01/07/2023 13:16 WG1984826
Benzene 0.550 B J 0.0941 1.00 1 01/07/2023 13:16 WG1984826
Bromobenzene U 0.118 1.00 1 01/07/2023 13:16 WG1984826
Bromodichloromethane U 0.136 1.00 1 01/07/2023 13:16 WG1984826
Bromoform U 0.129 1.00 1 01/07/2023 13:16 WG1984826
Bromomethane U 0.605 5.00 1 01/07/2023 13:16 WG1984826
n-Butylbenzene U 0.157 1.00 1 01/07/2023 13:16 WG1984826
sec-Butylbenzene U 0.125 1.00 1 01/07/2023 13:16 WG1984826
tert-Butylbenzene U 0.127 1.00 1 01/07/2023 13:16 WG1984826
Carbon tetrachloride U 0.128 1.00 1 01/07/2023 13:16 WG1984826
Chlorobenzene U 0.116 1.00 1 01/07/2023 13:16 WG1984826
Chlorodibromomethane U 0.140 1.00 1 01/07/2023 13:16 WG1984826
Chloroethane U 0.192 5.00 1 01/07/2023 13:16 WG1984826
Chloroform U 0.111 5.00 1 01/07/2023 13:16 WG1984826
Chloromethane U 0.960 2.50 1 01/07/2023 13:16 WG1984826
2-Chlorotoluene U 0.106 1.00 1 01/07/2023 13:16 WG1984826
4-Chlorotoluene U 0.114 1.00 1 01/07/2023 13:16 WG1984826
1,2-Dibromo-3-Chloropropane U 0.276 5.00 1 01/07/2023 13:16 WG1984826
1,2-Dibromoethane U 0.126 1.00 1 01/07/2023 13:16 WG1984826
Dibromomethane U 0.122 1.00 1 01/07/2023 13:16 WG1984826
1,2-Dichlorobenzene U 0.107 1.00 1 01/07/2023 13:16 WG1984826
1,3-Dichlorobenzene U 0.110 1.00 1 01/07/2023 13:16 WG1984826
1,4-Dichlorobenzene U 0.120 1.00 1 01/07/2023 13:16 WG1984826
Dichlorodifluoromethane U 0.374 5.00 1 01/07/2023 13:16 WG1984826
1,1-Dichloroethane U 0.100 1.00 1 01/07/2023 13:16 WG1984826
1,2-Dichloroethane U 0.0819 1.00 1 01/07/2023 13:16 WG1984826
1,1-Dichloroethene U 0.188 1.00 1 01/07/2023 13:16 WG1984826
cis-1,2-Dichloroethene U 0.126 1.00 1 01/07/2023 13:16 WG1984826
trans-1,2-Dichloroethene U 0.149 1.00 1 01/07/2023 13:16 WG1984826
1,2-Dichloropropane U 0.149 1.00 1 01/07/2023 13:16 WG1984826
1,1-Dichloropropene U 0.142 1.00 1 01/07/2023 13:16 WG1984826
1,3-Dichloropropane U 0.110 1.00 1 01/07/2023 13:16 WG1984826
2,2-Dichloropropane U 0.161 1.00 1 01/07/2023 13:16 WG1984826
Di-isopropyl ether U 0.105 1.00 1 01/07/2023 13:16 WG1984826
Ethylbenzene 0.343 J 0.137 1.00 1 01/07/2023 13:16 WG1984826
Hexachloro-1,3-butadiene U 0.337 1.00 1 01/07/2023 13:16 WG1984826
Isopropylbenzene U 0.105 1.00 1 01/07/2023 13:16 WG1984826
p-Isopropyltoluene U 0.120 1.00 1 01/07/2023 13:16 WG1984826
2-Butanone (MEK)U 1.19 10.0 1 01/07/2023 13:16 WG1984826
Methylene Chloride U 0.430 5.00 1 01/07/2023 13:16 WG1984826
4-Methyl-2-pentanone (MIBK) U 0.478 10.0 1 01/07/2023 13:16 WG1984826
Methyl tert-butyl ether U 0.101 1.00 1 01/07/2023 13:16 WG1984826
Naphthalene U 1.00 5.00 1 01/07/2023 13:16 WG1984826
n-Propylbenzene U 0.0993 1.00 1 01/07/2023 13:16 WG1984826
Styrene U 0.118 1.00 1 01/07/2023 13:16 WG1984826
1,1,1,2-Tetrachloroethane U 0.147 1.00 1 01/07/2023 13:16 WG1984826
1,1,2,2-Tetrachloroethane U 0.133 1.00 1 01/07/2023 13:16 WG1984826
Tetrachloroethene U 0.300 1.00 1 01/07/2023 13:16 WG1984826
Toluene 0.662 J 0.278 1.00 1 01/07/2023 13:16 WG1984826
1,2,3-Trichlorobenzene U 0.230 1.00 1 01/07/2023 13:16 WG1984826
1,2,4-Trichlorobenzene U 0.481 1.00 1 01/07/2023 13:16 WG1984826
1,1,1-Trichloroethane U 0.149 1.00 1 01/07/2023 13:16 WG1984826
1,1,2-Trichloroethane U 0.158 1.00 1 01/07/2023 13:16 WG1984826
Trichloroethene U 0.190 1.00 1 01/07/2023 13:16 WG1984826
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:50 26 of 39
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:58 26 of 39
SAMPLE RESULTS - 11
L1572616
TRIP BLANK
Collected date/time: 12/29/22 00:00
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 0.160 5.00 1 01/07/2023 13:16 WG1984826
1,2,3-Trichloropropane U 0.237 2.50 1 01/07/2023 13:16 WG1984826
1,2,4-Trimethylbenzene U 0.322 1.00 1 01/07/2023 13:16 WG1984826
1,3,5-Trimethylbenzene U 0.104 1.00 1 01/07/2023 13:16 WG1984826
Vinyl chloride U 0.234 1.00 1 01/07/2023 13:16 WG1984826
o-Xylene U 0.174 1.00 1 01/07/2023 13:16 WG1984826
m&p-Xylenes U 0.430 2.00 1 01/07/2023 13:16 WG1984826
(S) Toluene-d8 115 80.0-120 01/07/2023 13:16 WG1984826
(S) 4-Bromofluorobenzene 105 77.0-126 01/07/2023 13:16 WG1984826
(S) 1,2-Dichloroethane-d4 90.4 70.0-130 01/07/2023 13:16 WG1984826
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:58 27 of 39
QUALITY CONTROL SUMMARYWG1984826
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1572616-03,04,05,06,07,08,09,10,11
Method Blank (MB)
(MB) R3879042-3 01/07/23 10:23
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
Acetone U 11.3 50.0
Acrolein U 2.54 50.0
Acrylonitrile U 0.671 10.0
Benzene 0.116 J 0.0941 1.00
Bromobenzene U 0.118 1.00
Bromodichloromethane U 0.136 1.00
Bromoform U 0.129 1.00
Bromomethane U 0.605 5.00
n-Butylbenzene U 0.157 1.00
sec-Butylbenzene U 0.125 1.00
tert-Butylbenzene U 0.127 1.00
Carbon tetrachloride U 0.128 1.00
Chlorobenzene U 0.116 1.00
Chlorodibromomethane U 0.140 1.00
Chloroethane U 0.192 5.00
Chloroform U 0.111 5.00
Chloromethane U 0.960 2.50
2-Chlorotoluene U 0.106 1.00
4-Chlorotoluene U 0.114 1.00
1,2-Dibromo-3-Chloropropane U 0.276 5.00
1,2-Dibromoethane U 0.126 1.00
Dibromomethane U 0.122 1.00
1,2-Dichlorobenzene U 0.107 1.00
1,3-Dichlorobenzene U 0.110 1.00
1,4-Dichlorobenzene U 0.120 1.00
Dichlorodifluoromethane U 0.374 5.00
1,1-Dichloroethane U 0.100 1.00
1,2-Dichloroethane U 0.0819 1.00
1,1-Dichloroethene U 0.188 1.00
cis-1,2-Dichloroethene U 0.126 1.00
trans-1,2-Dichloroethene U 0.149 1.00
1,2-Dichloropropane U 0.149 1.00
1,1-Dichloropropene U 0.142 1.00
1,3-Dichloropropane U 0.110 1.00
2,2-Dichloropropane U 0.161 1.00
Di-isopropyl ether U 0.105 1.00
Ethylbenzene U 0.137 1.00
Hexachloro-1,3-butadiene U 0.337 1.00
Isopropylbenzene U 0.105 1.00
p-Isopropyltoluene U 0.120 1.00
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:50 28 of 39
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:58 28 of 39
QUALITY CONTROL SUMMARYWG1984826
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1572616-03,04,05,06,07,08,09,10,11
Method Blank (MB)
(MB) R3879042-3 01/07/23 10:23
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
2-Butanone (MEK)U 1.19 10.0
Methylene Chloride U 0.430 5.00
4-Methyl-2-pentanone (MIBK) U 0.478 10.0
Methyl tert-butyl ether U 0.101 1.00
Naphthalene U 1.00 5.00
n-Propylbenzene U 0.0993 1.00
Styrene U 0.118 1.00
1,1,1,2-Tetrachloroethane U 0.147 1.00
1,1,2,2-Tetrachloroethane U 0.133 1.00
Tetrachloroethene U 0.300 1.00
Toluene U 0.278 1.00
1,2,3-Trichlorobenzene U 0.230 1.00
1,2,4-Trichlorobenzene U 0.481 1.00
1,1,1-Trichloroethane U 0.149 1.00
1,1,2-Trichloroethane U 0.158 1.00
Trichloroethene U 0.190 1.00
Trichlorofluoromethane U 0.160 5.00
1,2,3-Trichloropropane U 0.237 2.50
1,2,4-Trimethylbenzene U 0.322 1.00
1,3,5-Trimethylbenzene U 0.104 1.00
Vinyl chloride U 0.234 1.00
o-Xylene U 0.174 1.00
m&p-Xylenes U 0.430 2.00
(S) Toluene-d8 118 80.0-120
(S) 4-Bromofluorobenzene 106 77.0-126
(S) 1,2-Dichloroethane-d4 87.6 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R3879042-1 01/07/23 09:25 • (LCSD) R3879042-2 01/07/23 09:44
Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l %%%%%
Acetone 25.0 38.0 31.8 152 127 19.0-160 17.8 27
Acrolein 25.0 24.9 23.5 99.6 94.0 10.0-160 5.79 26
Acrylonitrile 25.0 25.4 24.0 102 96.0 55.0-149 5.67 20
Benzene 5.00 4.91 4.80 98.2 96.0 70.0-123 2.27 20
Bromobenzene 5.00 3.92 3.86 78.4 77.2 73.0-121 1.54 20
Bromodichloromethane 5.00 4.30 4.26 86.0 85.2 75.0-120 0.935 20
Bromoform 5.00 5.78 5.72 116 114 68.0-132 1.04 20
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:50 29 of 39
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1572616 01/11/23 10:58 29 of 39
QUALITY CONTROL SUMMARYWG1984826
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1572616-03,04,05,06,07,08,09,10,11
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R3879042-1 01/07/23 09:25 • (LCSD) R3879042-2 01/07/23 09:44
Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l %%%%%
Bromomethane 5.00 4.98 5.17 99.6 103 10.0-160 3.74 25
n-Butylbenzene 5.00 3.80 3.79 76.0 75.8 73.0-125 0.264 20
sec-Butylbenzene 5.00 4.21 4.07 84.2 81.4 75.0-125 3.38 20
tert-Butylbenzene 5.00 4.44 4.51 88.8 90.2 76.0-124 1.56 20
Carbon tetrachloride 5.00 4.78 4.59 95.6 91.8 68.0-126 4.06 20
Chlorobenzene 5.00 5.54 5.57 111 111 80.0-121 0.540 20
Chlorodibromomethane 5.00 5.19 5.21 104 104 77.0-125 0.385 20
Chloroethane 5.00 5.00 4.89 100 97.8 47.0-150 2.22 20
Chloroform 5.00 4.40 4.47 88.0 89.4 73.0-120 1.58 20
Chloromethane 5.00 3.94 3.81 78.8 76.2 41.0-142 3.35 20
2-Chlorotoluene 5.00 3.96 4.16 79.2 83.2 76.0-123 4.93 20
4-Chlorotoluene 5.00 3.87 3.88 77.4 77.6 75.0-122 0.258 20
1,2-Dibromo-3-Chloropropane 5.00 4.56 5.20 91.2 104 58.0-134 13.1 20
1,2-Dibromoethane 5.00 5.57 5.71 111 114 80.0-122 2.48 20
Dibromomethane 5.00 4.80 4.95 96.0 99.0 80.0-120 3.08 20
1,2-Dichlorobenzene 5.00 5.04 5.09 101 102 79.0-121 0.987 20
1,3-Dichlorobenzene 5.00 4.84 5.12 96.8 102 79.0-120 5.62 20
1,4-Dichlorobenzene 5.00 4.95 5.26 99.0 105 79.0-120 6.07 20
Dichlorodifluoromethane 5.00 4.39 4.29 87.8 85.8 51.0-149 2.30 20
1,1-Dichloroethane 5.00 4.46 4.58 89.2 91.6 70.0-126 2.65 20
1,2-Dichloroethane 5.00 3.97 3.90 79.4 78.0 70.0-128 1.78 20
1,1-Dichloroethene 5.00 5.16 4.37 103 87.4 71.0-124 16.6 20
cis-1,2-Dichloroethene 5.00 5.17 5.32 103 106 73.0-120 2.86 20
trans-1,2-Dichloroethene 5.00 5.14 4.96 103 99.2 73.0-120 3.56 20
1,2-Dichloropropane 5.00 4.27 4.11 85.4 82.2 77.0-125 3.82 20
1,1-Dichloropropene 5.00 4.42 4.59 88.4 91.8 74.0-126 3.77 20
1,3-Dichloropropane 5.00 5.26 5.34 105 107 80.0-120 1.51 20
2,2-Dichloropropane 5.00 5.06 5.26 101 105 58.0-130 3.88 20
Di-isopropyl ether 5.00 3.61 3.65 72.2 73.0 58.0-138 1.10 20
Ethylbenzene 5.00 5.57 5.80 111 116 79.0-123 4.05 20
Hexachloro-1,3-butadiene 5.00 4.34 4.37 86.8 87.4 54.0-138 0.689 20
Isopropylbenzene 5.00 5.37 5.34 107 107 76.0-127 0.560 20
p-Isopropyltoluene 5.00 4.45 4.39 89.0 87.8 76.0-125 1.36 20
2-Butanone (MEK)25.0 22.0 21.4 88.0 85.6 44.0-160 2.76 20
Methylene Chloride 5.00 4.96 4.71 99.2 94.2 67.0-120 5.17 20
4-Methyl-2-pentanone (MIBK) 25.0 22.2 22.5 88.8 90.0 68.0-142 1.34 20
Methyl tert-butyl ether 5.00 4.72 4.78 94.4 95.6 68.0-125 1.26 20
Naphthalene 5.00 4.23 5.03 84.6 101 54.0-135 17.3 20
n-Propylbenzene 5.00 4.18 4.12 83.6 82.4 77.0-124 1.45 20
Styrene 5.00 5.05 4.83 101 96.6 73.0-130 4.45 20
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG1984826
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1572616-03,04,05,06,07,08,09,10,11
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R3879042-1 01/07/23 09:25 • (LCSD) R3879042-2 01/07/23 09:44
Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l %%%%%
1,1,1,2-Tetrachloroethane 5.00 5.62 5.76 112 115 75.0-125 2.46 20
1,1,2,2-Tetrachloroethane 5.00 4.71 4.80 94.2 96.0 65.0-130 1.89 20
Tetrachloroethene 5.00 5.63 5.55 113 111 72.0-132 1.43 20
Toluene 5.00 5.37 5.36 107 107 79.0-120 0.186 20
1,2,3-Trichlorobenzene 5.00 4.26 4.85 85.2 97.0 50.0-138 13.0 20
1,2,4-Trichlorobenzene 5.00 3.97 4.57 79.4 91.4 57.0-137 14.1 20
1,1,1-Trichloroethane 5.00 4.43 4.50 88.6 90.0 73.0-124 1.57 20
1,1,2-Trichloroethane 5.00 5.40 5.22 108 104 80.0-120 3.39 20
Trichloroethene 5.00 5.14 5.48 103 110 78.0-124 6.40 20
Trichlorofluoromethane 5.00 5.19 5.04 104 101 59.0-147 2.93 20
1,2,3-Trichloropropane 5.00 4.68 4.78 93.6 95.6 73.0-130 2.11 20
1,2,4-Trimethylbenzene 5.00 4.19 4.17 83.8 83.4 76.0-121 0.478 20
1,3,5-Trimethylbenzene 5.00 4.14 4.16 82.8 83.2 76.0-122 0.482 20
Vinyl chloride 5.00 4.51 4.55 90.2 91.0 67.0-131 0.883 20
o-Xylene 5.00 5.51 5.58 110 112 80.0-122 1.26 20
m&p-Xylenes 10.0 10.5 10.9 105 109 80.0-122 3.74 20
(S) Toluene-d8 115 116 80.0-120
(S) 4-Bromofluorobenzene 107 105 77.0-126
(S) 1,2-Dichloroethane-d4 90.3 91.9 70.0-130
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG1986337
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1572616-01,02
Method Blank (MB)
(MB) R3879870-3 01/10/23 19:42
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
Acetone U 11.3 50.0
Acrolein U 2.54 50.0
Acrylonitrile U 0.671 10.0
Benzene U 0.0941 1.00
Bromobenzene U 0.118 1.00
Bromodichloromethane U 0.136 1.00
Bromoform U 0.129 1.00
Bromomethane U 0.605 5.00
n-Butylbenzene U 0.157 1.00
sec-Butylbenzene U 0.125 1.00
tert-Butylbenzene U 0.127 1.00
Carbon tetrachloride U 0.128 1.00
Chlorobenzene U 0.116 1.00
Chlorodibromomethane U 0.140 1.00
Chloroethane U 0.192 5.00
Chloroform U 0.111 5.00
Chloromethane U 0.960 2.50
2-Chlorotoluene U 0.106 1.00
4-Chlorotoluene U 0.114 1.00
1,2-Dibromo-3-Chloropropane U 0.276 5.00
1,2-Dibromoethane U 0.126 1.00
Dibromomethane U 0.122 1.00
1,2-Dichlorobenzene U 0.107 1.00
1,3-Dichlorobenzene U 0.110 1.00
1,4-Dichlorobenzene U 0.120 1.00
Dichlorodifluoromethane U 0.374 5.00
1,1-Dichloroethane U 0.100 1.00
1,2-Dichloroethane U 0.0819 1.00
1,1-Dichloroethene U 0.188 1.00
cis-1,2-Dichloroethene U 0.126 1.00
trans-1,2-Dichloroethene U 0.149 1.00
1,2-Dichloropropane U 0.149 1.00
1,1-Dichloropropene U 0.142 1.00
1,3-Dichloropropane U 0.110 1.00
2,2-Dichloropropane U 0.161 1.00
Di-isopropyl ether U 0.105 1.00
Ethylbenzene U 0.137 1.00
Hexachloro-1,3-butadiene U 0.337 1.00
Isopropylbenzene U 0.105 1.00
p-Isopropyltoluene U 0.120 1.00
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG1986337
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1572616-01,02
Method Blank (MB)
(MB) R3879870-3 01/10/23 19:42
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
2-Butanone (MEK)U 1.19 10.0
Methylene Chloride U 0.430 5.00
4-Methyl-2-pentanone (MIBK) U 0.478 10.0
Methyl tert-butyl ether U 0.101 1.00
Naphthalene U 1.00 5.00
n-Propylbenzene U 0.0993 1.00
Styrene U 0.118 1.00
1,1,1,2-Tetrachloroethane U 0.147 1.00
1,1,2,2-Tetrachloroethane U 0.133 1.00
Tetrachloroethene U 0.300 1.00
Toluene U 0.278 1.00
1,2,3-Trichlorobenzene U 0.230 1.00
1,2,4-Trichlorobenzene U 0.481 1.00
1,1,1-Trichloroethane U 0.149 1.00
1,1,2-Trichloroethane U 0.158 1.00
Trichloroethene U 0.190 1.00
Trichlorofluoromethane U 0.160 5.00
1,2,3-Trichloropropane U 0.237 2.50
1,2,4-Trimethylbenzene U 0.322 1.00
1,3,5-Trimethylbenzene U 0.104 1.00
Vinyl chloride U 0.234 1.00
o-Xylene U 0.174 1.00
m&p-Xylenes U 0.430 2.00
(S) Toluene-d8 95.6 80.0-120
(S) 4-Bromofluorobenzene 87.6 77.0-126
(S) 1,2-Dichloroethane-d4 91.4 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R3879870-1 01/10/23 18:38 • (LCSD) R3879870-2 01/10/23 18:59
Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l %%%%%
Acetone 25.0 24.9 22.3 99.6 89.2 19.0-160 11.0 27
Acrolein 25.0 25.0 21.8 100 87.2 10.0-160 13.7 26
Acrylonitrile 25.0 24.2 21.9 96.8 87.6 55.0-149 9.98 20
Benzene 5.00 4.71 4.64 94.2 92.8 70.0-123 1.50 20
Bromobenzene 5.00 5.04 5.01 101 100 73.0-121 0.597 20
Bromodichloromethane 5.00 5.04 4.89 101 97.8 75.0-120 3.02 20
Bromoform 5.00 4.66 4.62 93.2 92.4 68.0-132 0.862 20
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG1986337
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1572616-01,02
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R3879870-1 01/10/23 18:38 • (LCSD) R3879870-2 01/10/23 18:59
Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l %%%%%
Bromomethane 5.00 5.71 6.00 114 120 10.0-160 4.95 25
n-Butylbenzene 5.00 4.79 4.68 95.8 93.6 73.0-125 2.32 20
sec-Butylbenzene 5.00 4.73 4.68 94.6 93.6 75.0-125 1.06 20
tert-Butylbenzene 5.00 4.79 4.87 95.8 97.4 76.0-124 1.66 20
Carbon tetrachloride 5.00 4.22 4.20 84.4 84.0 68.0-126 0.475 20
Chlorobenzene 5.00 4.72 4.84 94.4 96.8 80.0-121 2.51 20
Chlorodibromomethane 5.00 4.68 4.62 93.6 92.4 77.0-125 1.29 20
Chloroethane 5.00 4.88 4.66 97.6 93.2 47.0-150 4.61 20
Chloroform 5.00 4.75 4.55 95.0 91.0 73.0-120 4.30 20
Chloromethane 5.00 4.56 4.59 91.2 91.8 41.0-142 0.656 20
2-Chlorotoluene 5.00 5.04 5.01 101 100 76.0-123 0.597 20
4-Chlorotoluene 5.00 4.99 5.01 99.8 100 75.0-122 0.400 20
1,2-Dibromo-3-Chloropropane 5.00 5.22 4.55 104 91.0 58.0-134 13.7 20
1,2-Dibromoethane 5.00 5.04 4.87 101 97.4 80.0-122 3.43 20
Dibromomethane 5.00 5.41 4.91 108 98.2 80.0-120 9.69 20
1,2-Dichlorobenzene 5.00 5.39 5.29 108 106 79.0-121 1.87 20
1,3-Dichlorobenzene 5.00 4.97 5.00 99.4 100 79.0-120 0.602 20
1,4-Dichlorobenzene 5.00 4.74 5.00 94.8 100 79.0-120 5.34 20
Dichlorodifluoromethane 5.00 4.24 3.89 84.8 77.8 51.0-149 8.61 20
1,1-Dichloroethane 5.00 4.75 4.51 95.0 90.2 70.0-126 5.18 20
1,2-Dichloroethane 5.00 4.87 4.61 97.4 92.2 70.0-128 5.49 20
1,1-Dichloroethene 5.00 4.76 4.04 95.2 80.8 71.0-124 16.4 20
cis-1,2-Dichloroethene 5.00 5.17 4.59 103 91.8 73.0-120 11.9 20
trans-1,2-Dichloroethene 5.00 4.95 4.42 99.0 88.4 73.0-120 11.3 20
1,2-Dichloropropane 5.00 4.86 4.52 97.2 90.4 77.0-125 7.25 20
1,1-Dichloropropene 5.00 4.67 4.19 93.4 83.8 74.0-126 10.8 20
1,3-Dichloropropane 5.00 4.88 4.77 97.6 95.4 80.0-120 2.28 20
2,2-Dichloropropane 5.00 4.32 4.08 86.4 81.6 58.0-130 5.71 20
Di-isopropyl ether 5.00 4.85 4.70 97.0 94.0 58.0-138 3.14 20
Ethylbenzene 5.00 4.51 4.39 90.2 87.8 79.0-123 2.70 20
Hexachloro-1,3-butadiene 5.00 5.01 5.05 100 101 54.0-138 0.795 20
Isopropylbenzene 5.00 4.49 4.36 89.8 87.2 76.0-127 2.94 20
p-Isopropyltoluene 5.00 4.81 4.87 96.2 97.4 76.0-125 1.24 20
2-Butanone (MEK)25.0 25.1 23.4 100 93.6 44.0-160 7.01 20
Methylene Chloride 5.00 5.02 5.15 100 103 67.0-120 2.56 20
4-Methyl-2-pentanone (MIBK) 25.0 24.2 23.4 96.8 93.6 68.0-142 3.36 20
Methyl tert-butyl ether 5.00 4.60 4.59 92.0 91.8 68.0-125 0.218 20
Naphthalene 5.00 3.83 3.88 76.6 77.6 54.0-135 1.30 20
n-Propylbenzene 5.00 4.83 4.74 96.6 94.8 77.0-124 1.88 20
Styrene 5.00 4.76 4.45 95.2 89.0 73.0-130 6.73 20
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG1986337
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1572616-01,02
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R3879870-1 01/10/23 18:38 • (LCSD) R3879870-2 01/10/23 18:59
Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l %%%%%
1,1,1,2-Tetrachloroethane 5.00 4.45 4.69 89.0 93.8 75.0-125 5.25 20
1,1,2,2-Tetrachloroethane 5.00 5.56 5.41 111 108 65.0-130 2.73 20
Tetrachloroethene 5.00 4.44 4.48 88.8 89.6 72.0-132 0.897 20
Toluene 5.00 4.86 4.76 97.2 95.2 79.0-120 2.08 20
1,2,3-Trichlorobenzene 5.00 4.57 4.81 91.4 96.2 50.0-138 5.12 20
1,2,4-Trichlorobenzene 5.00 4.99 4.77 99.8 95.4 57.0-137 4.51 20
1,1,1-Trichloroethane 5.00 4.41 4.23 88.2 84.6 73.0-124 4.17 20
1,1,2-Trichloroethane 5.00 4.48 4.74 89.6 94.8 80.0-120 5.64 20
Trichloroethene 5.00 4.62 4.65 92.4 93.0 78.0-124 0.647 20
Trichlorofluoromethane 5.00 4.30 4.01 86.0 80.2 59.0-147 6.98 20
1,2,3-Trichloropropane 5.00 4.73 5.10 94.6 102 73.0-130 7.53 20
1,2,4-Trimethylbenzene 5.00 4.78 4.72 95.6 94.4 76.0-121 1.26 20
1,3,5-Trimethylbenzene 5.00 4.76 4.87 95.2 97.4 76.0-122 2.28 20
Vinyl chloride 5.00 4.70 4.48 94.0 89.6 67.0-131 4.79 20
o-Xylene 5.00 4.52 4.58 90.4 91.6 80.0-122 1.32 20
m&p-Xylenes 10.0 8.82 8.55 88.2 85.5 80.0-122 3.11 20
(S) Toluene-d8 91.4 92.3 80.0-120
(S) 4-Bromofluorobenzene 85.2 90.7 77.0-126
(S) 1,2-Dichloroethane-d4 91.8 89.7 70.0-130
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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GLOSSARY OF TERMS
Guide to Reading and Understanding Your Laboratory Report
The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not
intended as a comprehensive explanation, and if you have additional questions please contact your project representative.
Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name,
Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and
Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received.
Abbreviations and Definitions
MDL Method Detection Limit.
RDL Reported Detection Limit.
Rec.Recovery.
RPD Relative Percent Difference.
SDG Sample Delivery Group.
(S)
Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and
Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be
detected in all environmental media.
U Not detected at the Reporting Limit (or MDL where applicable).
Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes
reported.
Dilution
If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the
standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the
laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the
result reported has already been corrected for this factor.
Limits
These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal
for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or
duplicated within these ranges.
Qualifier
This column provides a letter and/or number designation that corresponds to additional information concerning the result
reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and
potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable.
Result
The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was
no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL”
(Below Detectable Levels). The information in the results column should always be accompanied by either an MDL
(Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect
or report for this analyte.
Uncertainty
(Radiochemistry)Confidence level of 2 sigma.
Case Narrative (Cn)
A brief discussion about the included sample results, including a discussion of any non-conformances to protocol
observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will
be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report.
Quality Control
Summary (Qc)
This section of the report includes the results of the laboratory quality control analyses required by procedure or
analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not
being performed on your samples typically, but on laboratory generated material.
Sample Chain of
Custody (Sc)
This is the document created in the field when your samples were initially collected. This is used to verify the time and
date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This
chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the
samples from the time of collection until delivery to the laboratory for analysis.
Sample Results (Sr)
This section of your report will provide the results of all testing performed on your samples. These results are provided
by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for
each sample will provide the name and method number for the analysis reported.
Sample Summary (Ss)This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and
times of preparation and/or analysis.
Qualifier Description
B The same analyte is found in the associated blank.
J The identification of the analyte is acceptable; the reported value is an estimate.
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122
Alabama 40660 Nebraska NE-OS-15-05
Alaska 17-026 Nevada TN000032021-1
Arizona AZ0612 New Hampshire 2975
Arkansas 88-0469 New Jersey–NELAP TN002
California 2932 New Mexico ¹TN00003
Colorado TN00003 New York 11742
Connecticut PH-0197 North Carolina Env375
Florida E87487 North Carolina ¹DW21704
Georgia NELAP North Carolina ³41
Georgia ¹923 North Dakota R-140
Idaho TN00003 Ohio–VAP CL0069
Illinois 200008 Oklahoma 9915
Indiana C-TN-01 Oregon TN200002
Iowa 364 Pennsylvania 68-02979
Kansas E-10277 Rhode Island LAO00356
Kentucky ¹ ⁶KY90010 South Carolina 84004002
Kentucky ²16 South Dakota n/a
Louisiana AI30792 Tennessee ¹ ⁴2006
Louisiana LA018 Texas T104704245-20-18
Maine TN00003 Texas ⁵LAB0152
Maryland 324 Utah TN000032021-11
Massachusetts M-TN003 Vermont VT2006
Michigan 9958 Virginia 110033
Minnesota 047-999-395 Washington C847
Mississippi TN00003 West Virginia 233
Missouri 340 Wisconsin 998093910
Montana CERT0086 Wyoming A2LA
A2LA – ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789
A2LA – ISO 17025 ⁵1461.02 DOD 1461.01
Canada 1461.01 USDA P330-15-00234
EPA–Crypto TN00003
ACCREDITATIONS & LOCATIONS

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

APPENDIX C – SUPPLEMENTAL SITE HISTORY TABLES

Table B-2: (Former) SERVCO No. 01711
850 North Liberty Street
Winston-Salem, North Carolina
NCDENR Incident No. 20966
Excel Project No. 24090
UST ID
Number WS-5839 Facility ID
Number 0-015707
City State Zip Telephone Number
Albemarle North Carolina 28001 [phone]
City State Zip Telephone Number
Albemarle North Carolina 28001 [phone]
City State Zip Telephone Number
Street Address
5/15/49 to 5/3/99
Street Address
Street Address
1024 North 2nd Street
Name of other Responsible Party
for Other Incident Date of Release (mm/dd/yy to mm/dd/yy
Out of service
Other Incidents Onsite or Commingled/In Close Proximity Number
none
Dates of Operation
(mm/dd/yy to mm/dd/yy)
5/15/49 to 5/3/99
Street Address
1024 North 2nd Street
Name of Operator Dates of Operation (mm/dd/yy to mm/dd/yy)
Name of Owner (and Contact)
Service Distributing Company, Inc.
5/12/2009 39.74‐‐ ‐‐59.703/8/2010 38.41‐‐ ‐‐61.0311/2/2010 37.08‐‐ ‐‐62.365/19/2011 37.81‐‐ ‐‐61.6311/21/2013 38.97‐‐ ‐‐60.475/28/2015 37.53‐‐ ‐‐61.9111/17/2015 38.22‐‐ ‐‐61.223/24/2017 37.31‐‐ ‐‐62.1310/12/2017 36.64‐‐ ‐‐62.803/21‐12/22*     Depth to Water is measured from Top of Casing**   If NAPL is present in a well, groundwater elevation is calculated by: [Top of Casing Elevation ‐ Depth to Water] + [NAPL thickness x 0.8581]NM ‐ Not MeasuredExcel Project No. 24090Top of Casing Elevation (AMSL) NAPL Thickness  (feet)Depth to Water* (Corrected for NAPL Thickness) (feet)Groundwater Surface Elevation** (AMSL)Well ID # Screened Interval  (top of screen, bottom of screen)Date Measured (mm/dd/yy)TABLE B‐9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS  Revision Date: February 9, 2023(FORMER) SERVCO NO. 01711850 NORTH LIBERTY STREET, WINSTON‐SALEM, NORTH CAROLINANCDEQ Incident No. 20966 / Facility Id No. 00‐0‐0000015707Not LocatedDepth to Water* (Uncorrected)  (feet)MW‐1 99.4437‐47
3/21/2000 42.17 5.08 37.81 60.84
3/30/2000 39.31 1.3 38.19 60.46
4/27/2000 37.50 1.4 36.30 62.35
7/19/2000 39.78 1.93 38.12 60.53
7/26/2000 40.48 2.82 38.06 60.59
8/15/2000 39.96 1.81 38.41 58.69
8/22/2000 39.49 1.3 38.37 60.28
1/10/2002 43.75 4.55 39.85 58.80
1/16/2002 40.77 0.55 40.30 58.35
2/5/2002 41.14 0.92 40.35 58.30
2/20/2002 40.96 0.54 40.50 58.15
3/20/2002 40.73 0.4 40.39 58.26
5/22/2002 41.46 0.71 40.85 57.80
9/29 ‐ 10/3/03 38.88 1.94 37.22 61.43
2/16 ‐ 2/20/04 37.15 0.64 36.60 62.05
1/22 ‐ 1/26/07 37.56 2.34 35.55 63.10
2/20/2007 37.75 0.4 37.41 61.24
5/12/2009 40.92 2.58 38.71 59.94
3/8/2010 38.70 1.56 37.36 61.29
11/2/2010 37.50 1.57 36.15 62.50
5/19/2011 37.71 0.96 36.89 61.76
11/21/2013 38.78 1.74 37.29 61.36
5/28/2015 36.90 Trace 36.90 61.75
11/17/2015 37.22 0.05 37.18 61.47
3/24/2017 36.20 0.17 36.05 62.60
10/12/2017 35.62 ‐‐35.62 63.03
3/25/2021 33.19 0.59 32.68 65.97
8/2/2021 32.16 0.49 31.74 66.91
9/15/2021 32.81 0.50 32.38 66.27
10/13/2021 33.67 0.38 39.85 64.98
11/29/2021 33.49 0.16 33.35 65.30
12/29/2021 34.08 0.18 33.93 64.72
1/20/2022 34.18 0.12 34.08 64.57
2/17/2022 34.44 Trace 34.44 64.21
3/18/2022 34.96 Trace 34.96 63.69
4/27/2022 34.85 0.02 34.83 63.82
5/23/2022 35.18 0.02 35.16 63.49
6/23/2022 34.94 0.02 34.92 63.73
7/20/2022 35.01 0.00 ‐‐63.64
8/24/2022 35.54 0.01 35.53 63.12
9/21/2022 35.59 0.04 35.56 63.09
10/19/2022 35.87 0.04 35.84 62.81
11/22/2022 35.98 0.03 35.95 62.70
12/29/2022 36.18 0.06 36.13 62.52
*Depth to Water is measured from Top of Casing
**   If NAPL is present in a well, groundwater elevation is calculated by: [Top of Casing Elevation ‐ Depth to Water] + [NAPL thickness x 0.8581]
NM ‐ Not Measured
Excel Project No. 24090
TABLE B‐9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS  
Revision Date: February 9, 2023
(FORMER) SERVCO NO. 01711
850 NORTH LIBERTY STREET, WINSTON‐SALEM, NORTH CAROLINA
NCDEQ Incident No. 20966 / Facility Id No. 00‐0‐0000015707
Depth to Water* 
(Corrected for 
NAPL Thickness) 
(feet)
Groundwater 
Surface 
Elevation** 
(AMSL)
MW‐2 98.65 37‐47
Well ID # Top of Casing 
Elevation (AMSL) 
Screened Interval   
(top of screen, 
bottom of screen)
Date 
Measured 
(mm/dd/yy)
Depth to Water* 
(Uncorrected)  
(feet)
NAPL 
Thickness    
(feet)
3/25/2021 32.63‐‐ ‐‐65.388/2/20219/15/2021 32.84‐‐ ‐‐65.1710/13/2021 33.29‐‐ ‐‐64.7211/29/2021 33.50‐‐ ‐‐64.5112/29/2021 33.70‐‐ ‐‐64.311/20/20222/17/2022 34.08‐‐ ‐‐63.933/18/2022 34.58‐‐ ‐‐63.434/27/2022 34.73‐‐ ‐‐63.285/23/2022 34.93‐‐ ‐‐63.086/23/2022 33.29‐‐ ‐‐64.727/20/2022 35.01‐‐ ‐‐63.008/24/2022 35.28‐‐62.739/21/2022 35.34‐‐ ‐‐62.6710/19/2022 35.53‐‐ ‐‐62.4811/22/2022 35.62‐‐ ‐‐62.3912/29/2022 33.29‐‐ ‐‐64.72*     Depth to Water is measured from Top of Casing**   If NAPL is present in a well, groundwater elevation is calculated by: [Top of Casing Elevation ‐ Depth to Water] + [NAPL thickness x 0.8581]NM ‐ Not MeasuredExcel Project No. 24090TABLE B‐9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS  Revision Date: February 9, 2023(FORMER) SERVCO NO. 01711850 NORTH LIBERTY STREET, WINSTON‐SALEM, NORTH CAROLINANCDEQ Incident No. 20966 / Facility Id No. 00‐0‐0000015707MW‐2R 98.0122‐47Not MeasuredDepth to Water* (Corrected for NAPL Thickness) (feet)Groundwater Surface Elevation** (AMSL)Well ID # Top of Casing Elevation (AMSL) Screened Interval  (top of screen, bottom of screen)Date Measured (mm/dd/yy)Depth to Water* (Uncorrected)  (feet)NAPL Thickness   (feet)Inaccessible
3/8/201011/2/2010 36.25‐‐ ‐‐62.315/19/2011 37.18‐‐ ‐‐61.3811/21/2013 37.50‐‐ ‐‐61.065/28/2015 36.98‐‐ ‐‐61.5811/17/2015 37.48‐‐ ‐‐61.083/24/201710/12/2017 35.88‐‐ ‐‐62.683/25/20219/15/2021 34.30‐‐ ‐‐64.266/23/2022 36.06‐‐ ‐‐62.5012/29/2022 36.82‐‐ ‐‐61.74*     Depth to Water is measured from Top of Casing**   If NAPL is present in a well, groundwater elevation is calculated by: [Top of Casing Elevation ‐ Depth to Water] + [NAPL thickness x 0.8581]NM ‐ Not MeasuredExcel Project No. 24090TABLE B‐9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS  Revision Date: February 9, 2023(FORMER) SERVCO NO. 01711850 NORTH LIBERTY STREET, WINSTON‐SALEM, NORTH CAROLINANCDEQ Incident No. 20966 / Facility Id No. 00‐0‐0000015707Depth to Water* (Corrected for NAPL Thickness) (feet)Groundwater Surface Elevation** (AMSL)MW‐3 98.5637‐47Not LocatedNot LocatedWell ID # Top of Casing Elevation (AMSL) Screened Interval   (top of screen, bottom of screen)Date Measured (mm/dd/yy)Depth to Water* (Uncorrected)  (feet)NAPL Thickness   (feet)Not Located
3/8/2010 38.42‐‐38.42 60.0211/2/2010 37.611.9135.9762.475/19/2011 38.972.2937.0061.4411/21/2013 38.852.236.9661.485/28/2015 37.050.0537.0161.4311/17/2015 36.82‐‐36.8261.623/24/2017 37.720.0237.7060.7410/12/2017 35.730.1235.6362.813/25/2021 32.70‐‐‐‐65.748/2/2021 32.95‐‐‐‐65.499/15/2021 33.14‐‐‐‐65.3010/13/2021 33.35‐‐‐‐65.0911/29/2021 33.79‐‐‐‐64.6512/29/2021 34.03‐‐‐‐64.411/20/2022 34.40‐‐‐‐64.042/17/2022 34.30‐‐‐‐64.143/18/2022 34.63‐‐‐‐63.814/27/2022 34.66‐‐‐‐63.785/23/2022 34.87‐‐‐‐63.576/23/2022 34.69‐‐‐‐63.757/20/2022 34.96‐‐‐‐63.488/24/2022 35.22‐‐‐‐63.229/21/2022 35.30‐‐‐‐63.1410/19/2022 35.45‐‐‐‐62.9911/22/2022 35.55‐‐‐‐62.8912/29/2022 35.43‐‐‐‐63.01*     Depth to Water is measured from Top of Casing**   If NAPL is present in a well, groundwater elevation is calculated by: [Top of Casing Elevation ‐ Depth to Water] + [NAPL thickness x 0.8581]NM ‐ Not MeasuredExcel Project No. 24090TABLE B‐9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS  Revision Date: February 9, 2023(FORMER) SERVCO NO. 01711850 NORTH LIBERTY STREET, WINSTON‐SALEM, NORTH CAROLINANCDEQ Incident No. 20966 / Facility Id No. 00‐0‐0000015707Depth to Water*  (Corrected for NAPL Thickness) (feet)Groundwater Surface Elevation** (AMSL)MW‐4 98.44 38‐48Well ID # Top of Casing Elevation (AMSL) Screened Interval  (top of screen, bottom of screen)Date Measured (mm/dd/yy)Depth to Water* (Uncorrected)  (feet)NAPL Thickness  (feet)
3/25/2021 32.57‐‐ ‐‐65.078/2/2021 32.83‐‐ ‐‐64.819/15/2021 32.98‐‐ ‐‐64.6610/13/2021 33.19‐‐ ‐‐64.4511/29/2021 33.64‐‐ ‐‐64.0012/29/2021 33.90‐‐ ‐‐63.741/20/2022 34.22‐‐ ‐‐63.422/17/2022 34.21‐‐ ‐‐63.433/18/2022 34.53‐‐ ‐‐63.114/27/2022 34.56‐‐ ‐‐63.085/23/2022 34.72‐‐ ‐‐62.926/23/2022 34.69‐‐ ‐‐62.957/20/2022 34.87‐‐ ‐‐62.778/24/2022 35.10‐‐ ‐‐62.549/21/2022 35.18‐‐ ‐‐62.4610/19/2022 35.34‐‐ ‐‐62.3011/22/2022 35.48‐‐ ‐‐62.1612/29/2022 35.53‐‐ ‐‐62.11*     Depth to Water is measured from Top of Casing**   If NAPL is present in a well, groundwater elevation is calculated by: [Top of Casing Elevation ‐ Depth to Water] + [NAPL thickness x 0.8581]NM ‐ Not MeasuredExcel Project No. 24090TABLE B‐9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS  Revision Date: February 9, 2023(FORMER) SERVCO NO. 01711850 NORTH LIBERTY STREET, WINSTON‐SALEM, NORTH CAROLINANCDEQ Incident No. 20966 / Facility Id No. 00‐0‐0000015707MW‐4R 97.6423‐48Depth to Water* (Corrected for NAPL Thickness) (feet)Groundwater Surface Elevation** (AMSL)Well ID # Top of Casing Elevation (AMSL) Screened Interval  (top of screen, bottom of screen)Date Measured (mm/dd/yy)Depth to Water* (Uncorrected)  (feet)NAPL Thickness  (feet)
3/8/201011/2/20105/19/201111/21/20135/28/201511/17/20153/24/201710/12/20173/25/2021*     Depth to Water is measured from Top of Casing**   If NAPL is present in a well, groundwater elevation is calculated by: [Top of Casing Elevation ‐ Depth to Water] + [NAPL thickness x 0.8581]NM ‐ Not MeasuredExcel Project No. 24090TABLE B‐9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS  Revision Date: February 9, 2023(FORMER) SERVCO NO. 01711850 NORTH LIBERTY STREET, WINSTON‐SALEM, NORTH CAROLINANCDEQ Incident No. 20966 / Facility Id No. 00‐0‐0000015707Depth to Water* (Corrected for NAPL Thickness) (feet)Groundwater Surface Elevation** (AMSL)MW‐5 100.0039.49Not Located ‐ Assumed DestroyedWell ID # Top of Casing Elevation (AMSL) Screened Interval   (top of screen, bottom of screen)Date Measured (mm/dd/yy)Depth to Water* (Uncorrected)  (feet)NAPL Thickness   (feet)
3/8/201038.31‐‐‐‐59.8911/2/2010 37.05‐‐‐‐61.155/19/2011 36.70‐‐‐‐61.5011/21/2013 37.03‐‐‐‐61.175/28/2015 36.44‐‐‐‐61.7611/17/2015 37.17‐‐‐‐61.033/24/2017 36.38‐‐‐‐61.8210/12/2017 35.46‐‐‐‐62.743/25/2021 32.44‐‐‐‐65.769/15/2021 32.68‐‐‐‐65.526/23/2022 34.81‐‐‐‐63.3912/29/2022 35.83‐‐‐‐62.37*     Depth to Water is measured from Top of Casing**   If NAPL is present in a well, groundwater elevation is calculated by: [Top of Casing Elevation ‐ Depth to Water] + [NAPL thickness x 0.8581]NM ‐ Not MeasuredExcel Project No. 24090TABLE B‐9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS  Revision Date: February 9, 2023(FORMER) SERVCO NO. 01711850 NORTH LIBERTY STREET, WINSTON‐SALEM, NORTH CAROLINANCDEQ Incident No. 20966 / Facility Id No. 00‐0‐0000015707Depth to Water* (Corrected for NAPL Thickness) (feet)Groundwater Surface Elevation** (AMSL)MW‐6 98.2025‐45Well ID # Top of Casing Elevation (AMSL) Screened Interval   (top of screen, bottom of screen)Date Measured (mm/dd/yy)Depth to Water* (Uncorrected)  (feet)NAPL Thickness   (feet)
3/8/201036.84‐‐‐‐62.4311/2/2010 35.75‐‐‐‐63.525/19/2011 37.91‐‐‐‐61.3611/21/2013 38.27‐‐‐‐61.005/28/2015 37.71‐‐‐‐61.5611/17/2015 38.34‐‐‐‐60.933/24/2017 37.49‐‐‐‐61.7810/12/2017 36.69‐‐‐‐62.583/25/2021 34.06‐‐‐‐65.219/15/2021 34.22‐‐‐‐65.056/23/2022 36.24‐‐‐‐63.0312/29/2022 37.15‐‐‐‐62.12*     Depth to Water is measured from Top of Casing**   If NAPL is present in a well, groundwater elevation is calculated by: [Top of Casing Elevation ‐ Depth to Water] + [NAPL thickness x 0.8581]NM ‐ Not MeasuredExcel Project No. 24090TABLE B‐9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS  Revision Date: February 9, 2023(FORMER) SERVCO NO. 01711850 NORTH LIBERTY STREET, WINSTON‐SALEM, NORTH CAROLINANCDEQ Incident No. 20966 / Facility Id No. 00‐0‐0000015707Depth to Water* (Corrected for NAPL Thickness) (feet)Groundwater Surface Elevation** (AMSL)MW‐7 99.2725‐45Well ID # Top of Casing Elevation (AMSL) Screened Interval   (top of screen, bottom of screen)Date Measured (mm/dd/yy)Depth to Water* (Uncorrected)  (feet)NAPL Thickness   (feet)
5/19/2011 38.53‐‐ ‐‐61.6211/21/2013 38.05‐‐ ‐‐62.105/28/2015 38.11‐‐ ‐‐62.0411/17/2015 38.86‐‐ ‐‐61.293/24/2017 38.03‐‐ ‐‐62.1210/12/2017 37.32‐‐ ‐‐62.833/2021‐12‐2022*     Depth to Water is measured from Top of Casing**   If NAPL is present in a well, groundwater elevation is calculated by: [Top of Casing Elevation ‐ Depth to Water] + [NAPL thickness x 0.8581]NM ‐ Not MeasuredExcel Project No. 24090TABLE B‐9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS  Revision Date: February 9, 2023(FORMER) SERVCO NO. 01711850 NORTH LIBERTY STREET, WINSTON‐SALEM, NORTH CAROLINANCDEQ Incident No. 20966 / Facility Id No. 00‐0‐0000015707Depth to Water* (Corrected for NAPL Thickness) (feet)Groundwater Surface Elevation** (AMSL)MW‐8 100.1525‐45Well ID # Top of Casing Elevation (AMSL) Screened Interval   (top of screen, bottom of screen)Date Measured (mm/dd/yy)Depth to Water* (Uncorrected)  (feet)NAPL Thickness   (feet)Not Located
5/19/2011 36.39‐‐ ‐‐60.5311/21/2013 36.58‐‐ ‐‐60.345/28/2015 36.68‐‐ ‐‐60.2411/17/2015 37.30‐‐ ‐‐59.623/24/2017 36.02‐‐ ‐‐60.9010/12/2017 35.26‐‐ ‐‐61.663/25/2021 32.06‐‐ ‐‐64.869/15/2021 32.53‐‐ ‐‐64.396/23/2022 34.72‐‐ ‐‐62.2012/29/2022 35.76‐‐ ‐‐61.16*     Depth to Water is measured from Top of Casing**   If NAPL is present in a well, groundwater elevation is calculated by: [Top of Casing Elevation ‐ Depth to Water] + [NAPL thickness x 0.8581]NM ‐ Not MeasuredExcel Project No. 24090TABLE B‐9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS  Revision Date: February 9, 2023(FORMER) SERVCO NO. 01711850 NORTH LIBERTY STREET, WINSTON‐SALEM, NORTH CAROLINANCDEQ Incident No. 20966 / Facility Id No. 00‐0‐0000015707Depth to Water* (Corrected for NAPL Thickness) (feet)Groundwater Surface Elevation** (AMSL)MW‐9 96.9225‐45Well ID # Top of Casing Elevation (AMSL) Screened Interval   (top of screen, bottom of screen)Date Measured (mm/dd/yy)Depth to Water* (Uncorrected)  (feet)NAPL Thickness   (feet)
5/19/2011 38.24‐‐ ‐‐60.0411/21/2013 38.51‐‐ ‐‐59.775/28/2015 38.67‐‐ ‐‐59.6111/17/2015 39.10‐‐ ‐‐59.183/24/2017 38.09‐‐ ‐‐60.1910/12/2017 37.18‐‐ ‐‐61.103/25/2021 34.52‐‐ ‐‐63.769/15/2021 34.90‐‐ ‐‐63.386/23/2022 36.75‐‐ ‐‐61.5312/29/2022 37.60‐‐ ‐‐60.68*     Depth to Water is measured from Top of Casing**   If NAPL is present in a well, groundwater elevation is calculated by: [Top of Casing Elevation ‐ Depth to Water] + [NAPL thickness x 0.8581]NM ‐ Not MeasuredExcel Project No. 24090TABLE B‐9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS  Revision Date: February 9, 2023(FORMER) SERVCO NO. 01711850 NORTH LIBERTY STREET, WINSTON‐SALEM, NORTH CAROLINANCDEQ Incident No. 20966 / Facility Id No. 00‐0‐0000015707Depth to Water* (Corrected for NAPL Thickness) (feet)Groundwater Surface Elevation** (AMSL)MW‐10 98.2825‐45Well ID # Top of Casing Elevation (AMSL) Screened Interval   (top of screen, bottom of screen)Date Measured (mm/dd/yy)Depth to Water* (Uncorrected)  (feet)NAPL Thickness   (feet)
5/19/2011 37.64‐‐ ‐‐59.5511/21/2013 37.97‐‐ ‐‐59.225/28/2015 37.92‐‐ ‐‐59.2711/17/2015 38.26‐‐ ‐‐58.933/24/2017 37.22‐‐ ‐‐59.9710/12/2017 36.63‐‐ ‐‐60.563/25/2021 34.64‐‐ ‐‐62.559/15/2021 35.10‐‐ ‐‐62.096/23/2022 37.51‐‐ ‐‐59.6812/29/2022 37.26‐‐ ‐‐59.93*     Depth to Water is measured from Top of Casing**   If NAPL is present in a well, groundwater elevation is calculated by: [Top of Casing Elevation ‐ Depth to Water] + [NAPL thickness x 0.8581]NM ‐ Not MeasuredExcel Project No. 24090TABLE B‐9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS  Revision Date: February 9, 2023(FORMER) SERVCO NO. 01711850 NORTH LIBERTY STREET, WINSTON‐SALEM, NORTH CAROLINANCDEQ Incident No. 20966 / Facility Id No. 00‐0‐0000015707Depth to Water* (Corrected for NAPL Thickness) (feet)Groundwater Surface Elevation** (AMSL)MW‐11 97.1925‐45Well ID # Top of Casing Elevation (AMSL) Screened Interval   (top of screen, bottom of screen)Date Measured (mm/dd/yy)Depth to Water* (Uncorrected)  (feet)NAPL Thickness   (feet)
5/19/2011 38.42‐‐ ‐‐60.9611/21/2013 38.80‐‐ ‐‐60.585/28/201511/17/20153/24/201710/12/20173/2021‐12/2022*     Depth to Water is measured from Top of Casing**   If NAPL is present in a well, groundwater elevation is calculated by: [Top of Casing Elevation ‐ Depth to Water] + [NAPL thickness x 0.8581]NM ‐ Not MeasuredExcel Project No. 24090TABLE B‐9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS  Revision Date: February 9, 2023(FORMER) SERVCO NO. 01711850 NORTH LIBERTY STREET, WINSTON‐SALEM, NORTH CAROLINANCDEQ Incident No. 20966 / Facility Id No. 00‐0‐0000015707Depth to Water* (Corrected for NAPL Thickness) (feet)Groundwater Surface Elevation** (AMSL)MW‐12 99.3825‐45Not LocatedWell ID # Top of Casing Elevation (AMSL) Screened Interval   (top of screen, bottom of screen)Date Measured (mm/dd/yy)Depth to Water* (Uncorrected)  (feet)NAPL Thickness   (feet)
5/28/2015 37.08‐‐ ‐‐60.4811/17/2015 36.83‐‐ ‐‐60.733/24/2017 36.46‐‐ ‐‐61.1010/12/2017 35.41‐‐ ‐‐62.153/25/2021 32.09‐‐ ‐‐65.479/15/2021 33.93‐‐ ‐‐63.636/23/2022 35.41‐‐ ‐‐62.1512/29/2022 35.72‐‐ ‐‐61.84*     Depth to Water is measured from Top of Casing**   If NAPL is present in a well, groundwater elevation is calculated by: [Top of Casing Elevation ‐ Depth to Water] + [NAPL thickness x 0.8581]NM ‐ Not MeasuredExcel Project No. 24090TABLE B‐9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS  Revision Date: February 9, 2023(FORMER) SERVCO NO. 01711850 NORTH LIBERTY STREET, WINSTON‐SALEM, NORTH CAROLINANCDEQ Incident No. 20966 / Facility Id No. 00‐0‐0000015707Depth to Water* (Corrected for NAPL Thickness) (feet)Groundwater Surface Elevation** (AMSL)MW‐13 97.5625‐45Well ID # Top of Casing Elevation (AMSL) Screened Interval   (top of screen, bottom of screen)Date Measured (mm/dd/yy)Depth to Water* (Uncorrected)  (feet)NAPL Thickness   (feet)
17Table B-12: Evaluation of Change in Contaminant Mass Revision Date: 2/9/23 Incident Number and Name: 20966 former Servco No. 01711 Facility ID#: 00‐0‐0000020966 Initial Mass Estimate / Projected Milestones (from CAP) Initial Baseline Milestones1 End / Closure (Label 1) (Label 2) (Label 3) (Label 4) (Label 5) (Label 6) (Label 7) Projected Mass Reduction (%): 0% FP Rec FP Rec FP Rec FP Rec FP Rec Soil Source Zone Mass (Projected): Smear Source Zone Mass (Projected): Groundwater Zone Mass (Projected): Total Mass: Baseline/Milestone (Proj) 5,300 Measured / Calculated Change in Contaminant Mass (from sampling) Milestone Sampling / Measurement Event Dates1 7/2015 12/2015 6/2017 10/2017 3/2021 9/2021 6/2022 12/2022 Measured Mass2 - Soil Source Zone: Smear Source Zone: LNAPL 89,789 149,288 418,216 148,708 734,910 619,210 12,520 37,986Groundwater Zone: 155,622 106,102 141,360 53,059 40,615 51,970 82,456 60,884 5,300 Removed Mass3 - Excavated from Soil/Smear: Extracted as Vapor/Gas: Extracted as Liquid: Total Mass Removed (est.): Revised Total Mass (est.)4:245,411 255,390 559,576 201,767 775,525 671,180 94,976 98,870 5,300 Estimated Reduction Rate5: -4.1% -119.1% 63.9% -284.413.4 85.8 -4.10Reference Milestone (label from above) Reference Milestone (value from above) Reduction Progress vs Milestone6: -47.2-104.6-37.1-145.3 -125.6-16.92-17.61.Milestones are defined in the CAP. Label column headers with a representative title (‘Active Y1’, ‘MNA Yr 5’ etc.) Add sheets/columns as needed to more effectively track progress.2.Calculate the measured mass for each unit by multiplying the analytical result by the representative volume (weight, pore space, etc.). (See https://www3.epa.gov/region02/rcra/ra2.pdf)3.Calculate removed amounts based on excavation screening and/or system effluent monitoring, multiplied by total volume excavated or the system throughput during that period.4.Where measured from sampling/screening in situ, use the total Measured Mass. Where not screened (or if not representative), use prior Total Mass less current Total Mass Removed.5.This equals the % reduction from the prior mass (current Total Mass ÷ prior Total Mass). Very large negative values may indicate a new contribution and may require investigation.6.This equals the current mass reduction % progress (1 - (Revised Total Mass ÷ Applicable Milestone)). Zero or positive values indicate that the associated milestone has been reached

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APPENDIX D – MAINTENANCE FORMS