WS-5839_20966_CA_CAP_20230810_CAPR

EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC
www.excelengr.com
Excel Civil & Environmental Associates, PLLC
6 2 5 H u n t s m a n C o u r t
G a s t o n i a , N o r t h C a r o l i n a 2 8 0 5 4
N C L i c e n s e N o . P - 0 1 2 9
T e l e p h o n e : ( 7 0 4 ) 8 5 3 - 0 8 0 0
F a c s i m i l e : ( 7 0 4 ) 8 5 3 - 3 9 4 9
I n t e r n e t : www.excelengr.com
August 10, 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_20230810
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_20230810
EXCEL PROJECT NO. 24090
Latitude = 31.1048° / Longitude = 80.2434°
SOURCE OF RELEASE:
Former UST System – Amount Unknown
DATE SUBMITTED:
August 10, 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 August 10, 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 MANN-KENDALL GRAPHS
PPENDIX B LABORATORY REPORTS & CHAIN OF CUSTODY FORMS
PPENDIX C SUPPLEMENTAL SITE HISTORY TABLES
PPENDIX D MAINTENANCE FORMS

Corrective Action Performance Report August 10, 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. Lon
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 recover s stem 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 roundwater samplin of select wells
RISK ASSESSMENT
SENSITIVE RECEPTORS: Underground utilities on-site and within R/Ws of North
Libert Street and Chestnut Street; ad acent 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 August 10, 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.

During the reporting period, LNAPL was measured in January and March in MW-2 at
thicknesses of 0.09 and 0.01 feet. No other LNAPL was detected in any other well during the
reporting period of January through June. During the sampling event conducted in June 2023,
no LNAPL was recorded in any monitoring well and all wells were subsequently sampled. The
goal of the remediation system is to eliminate free product utilizing vacuum enhanced
pneumatic skimmers within the source area. The stated milestone has been achieved.

Based upon a review of the current analytical data from June 2023 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
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.
Corrective Action Performance Report August 10, 2023
(Former) Servco No. 01711 Incident No. 20966
Winston-Salem, North Carolina Excel No. 24090

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

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. An evaluation was completed by an electrician
on April 19, 2023 and it was determined the blower was locked up but the motor was
functioning.

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
evaluation. Excel returned to the property in September 2021 and restarted the vacuum
enhanced free product recovery system and completed the groundwater sampling event.
Corrective Action Performance Report August 10, 2023
(Former) Servco No. 01711 Incident No. 20966
Winston-Salem, North Carolina Excel No. 24090
EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC
www.excelengr.com
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 twelve monitor wells on June 21, 2023,
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-1, MW-2, MW-2R,
MW-3, MW-4, MW-4R, MW-6, MW-7, MW-8 MW-9, MW-10, MW-11 and MW-13 on June
21, 2023. Monitoring wells MW-5 and MW-12 could not be located and MW-11 was not part
of the current scope of work. Monitoring wells MW-1 and MW-8, which had not been located
since the October 2017 sampling event, were located by the property owner and were
subsequently sampled. During the sampling event conducted in June 2023, no LNAPL was
recorded in any monitoring well and all wells were subsequently sampled. A site map of
the facility detailing former structures and monitoring well locations is provided as Figure 2.
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-1, MW-2 and MW-2R
Methyl-tert-butyl-ether (MTBE)
GCL: MW-1, MW-2, MW-2R and MW-7
Ethylene Dibromide (EDB)
GCL: MW-6
Based upon a review of the current analytical data from June 2023, 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
Corrective Action Performance Report August 10, 2023
(Former) Servco No. 01711 Incident No. 20966
Winston-Salem, North Carolina Excel No. 24090
EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC
www.excelengr.com
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. An evaluation was completed by an electrician on April
19, 2023 and it was determined the blower was locked up but the motor still functioned.
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
•During the sampling event conducted in June 2023, no LNAPL was recorded in any
monitoring well and all wells were subsequently sampled. The goal of the remediation
system is to eliminate free product utilizing vacuum enhanced pneumatic skimmers within
the source area. The stated milestone has been achieved.
•During the reporting period, LNAPL was measured in January and March in MW-2 at
thicknesses of 0.09 and 0.01 feet. No other LNAPL was detected in any other well during
the reporting period of January through June, 2023 (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. However, Based on a review of the historical data collected from the site,
progress towards cleanup does not meet the 10-year MNA requirement in accordance with
agency guidelines. No significant change in contaminant mass has been measured since at
least 2010 in the vicinity of MW-1 and MW-2. We strongly recommend a path to closure for
this incident.
PLUME STABILITY EVALUATION
Based upon a review of the current analytical data from June 2023 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.
Corrective Action Performance Report August 10, 2023
(Former) Servco No. 01711 Incident No. 20966
Winston-Salem, North Carolina Excel No. 24090
EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC
www.excelengr.com
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
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-2R, MW-3, MW-6 and
MW-7) for MTBE (MW-1, MW-2R, MW-3, MW-6, MW-7 and MW-8) indicated the following:
o Benzene:
Stable: MW-1;
No Trend: MW-2R, MW-7;
Decreasing: MW-3, MW-6
o MTBE:
Stable: MW-1;
No Trend: MW-2R, MW-7;
Decreasing: MW-3, MW-6, MW-8
A review of the analytical results from the previous sampling round conducted in December of
2022 and October of 2017 for MW-1 indicates an increase in BTEX levels for MW-1 of 34-% and
a decrease in BTEX levels for MW-2R of 22-%.
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 to stable 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. An evaluation was completed by an electrician on April 19, 2023
and it was determined the blower was locked up but the motor still functioned.
During the sampling event conducted in June 2023, no LNAPL was recorded in any
monitoring well and all wells were subsequently sampled. The goal of the remediation
system is to eliminate free product utilizing vacuum enhanced pneumatic skimmers within
the source area. The stated milestone has been achieved. Excel recommends continued
gauging of LNAPL at the property through September 2023, followed by shutting down the
vacuum enhanced pneumatic skimmers if no LNAPL is detected.
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. However, Based on a review of the historical data collected from the site,
Monitoring Report August 10, 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

1/26/23: 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 measured in MW-2 at a thickness of 0.09’. Approximately 0.50’ of
recovered groundwater was measured in the recovery tank. The secondary
containment around the free product recovery tank was emptied. The FP recovery
system was operational at departure.
2/22/23: 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.
3/22/23: 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 0.01 feet. The FP recovery system was
operational at departure.
4/19/23: The SVE system was down upon arrival. The FP recovery system was down upon
arrival due to air compressor failure. Excel met with the electrician onsite and
determined the blower was locked up but the motor still functioned. Excel checked
MW-2, MW-2R, MW-4 and MW-4R for free product. No free product was detected
during the site visit. Due to the lack of free product, the system was left down to
monitor the site for free product rebound.
5/17/23: Both the SVE system and FP recovery systems were down upon arrival. The FP
recovery system was down 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. Due to the
lack of free product, the system was left down to monitor the site for free product
rebound.
6/21/23: Both the SVE system and FP recovery systems were down upon arrival. Checked
MW-2, MW-2R, MW-4 and MW-4R for free product. No free product was detected
during the site visit. Due to the lack of free product, the system was left down to
monitor the site for free product rebound. Completed semiannual groundwater
monitoring.

EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC
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. 01711
850 North Liberty Street
Winston-Salem, North Carolina
NCDEQ Incident No. 20966
Excel Project No. 24090
Well ID Date
Installed
Total
Depth
Screen
Interval
Top of
Casing
Elevation
Depth to
Product
Depth to
Water
Product
Thickness
Water Table
Elevation
MW-1 02/01/00 47 37 - 47 99.44 -- 37.65 -- 61.79
MW-2 02/02/00 47 37 - 47 98.65 -- 35.60 -- 63.05
MW-2R 09/17/19 47 22 - 47 98.01 -- 35.22 -- 62.79
MW-3 02/02/00 47 37 - 47 98.56 -- 36.29 -- 62.27
MW-4 02/01/00 48 38 - 48 98.44 -- 34.87 -- 63.57
MW-4R 09/17/19 48 23 - 48 97.64 -- 34.73 -- 62.91
MW-5 02/01/00 49 39 - 49 100.00
MW-6 02/24/10 45 25 - 45 98.20 -- 35.68 -- 62.52
MW-7 02/24/10 45 25 - 45 99.27 -- 37.20 -- 62.07
MW-8 05/11/11 45 25 - 45 100.15 -- 37.80 -- 62.35
MW-9 05/11/11 45 25 - 45 96.92 -- 35.37 -- 61.55
MW-10 05/11/11 45 25 - 45 98.28 -- 37.36 -- 60.92
MW-11 05/11/11 45 25 - 45 97.19
MW-12 05/11/11 45 25 - 45 99.38
MW-13 11/24/14 45 25 - 45 97.56 -- 35.88 -- 61.68
NOTES:
All data presented in feet
Water level data collected on June 21, 2023
NOT LOCATED
NOT LOCATED
NM - Not in Current SOW
Table 2
Summary of Current Groundwater Analytical Data
(Former) SERVCO No. 01711
850 North Liberty Street
Winston-Salem, North Carolina
NCDEQ Incident No. 20966
Excel Project No. 24090
DATE SAMPLED
BENZENE 17,200 13,100 11,400 0.142 J 1,080 265 1 5,000
TOLUENE 42,300 52,700 44,900 < 0.278 13,600 6,280 600 260,000
ETHYLBENZENE 3,950 4,980 3,720 < 0.137 1,390 1,890 600 84,500
TOTAL XYLENES 23,760 27,370 18,370 < 0.604 9,030 10,660 500 85,500
TOTAL BTEX 87,210 98,150 78,390 ~ 1.16 25,100 19,095 -- --
MTBE 211,000 99,700 94,000 1.4 78.5 J < 10.1 20 20,000
DI-ISOPROPYL ETHER 869 408 J 362 < 0.105 < 26.3 < 10.5 70 70,000
METHYLENE CHLORIDE < 86 < 215 < 21.5 < 0.43 < 108 < 43 5 5,000
NAPHTHALENE 537 J 1,000 J 454 < 1 689 J 578 6 6,000
ACETONE < 2,260 < 5,650 < 565 < 11.3 < 2,820 < 1,130 6,000 6,000,000
n-BUTYLBENZENE < 31.4 < 78.5 < 7.85 < 0.157 < 39.3 < 15.7 70 6,900
sec-BUTYLBENZENE < 25 < 62.5 24.1 J < 0.125 < 31.3 < 12.5 70 8,500
1,2-DIBROMOETHANE < 25.2 < 63 13.2 J < 0.126 < 31.5 13.4 J 0.02 50
1,2-DICHLOROETHANE 30.4 J 79.6 J 53.7 < 0.0819 < 20.5 < 8.19 0.4 400
ISOPROPYLBENZENE 154 J 273 J 138 < 0.105 82.9 J 82.9 J 70 25,000
2-BUTANONE 761 J < 595 452 J < 1.19 < 298 < 119 4,000 4,000,000
4-METHYL-2-PENTANONE 172 J < 239 257 J < 0.478 < 120 < 47.8 100 100,000
n-PROPYLBENZENE 338 699 361 < 0.0993 206 J 218 70 30,000
1,2,4-TRIMETHYLBENZENE 3,320 5,210 2,600 < 0.322 2,250 2,040 400 28,500
1,3,5-TRIMETHYLBENZENE 993 1,420 652 < 0.104 651 577 400 25,000
NOTES:Additional Constituents Reported for 6-23 Sampling:
Data in micrograms per liter or g/l MW-1 - p-Isopropyltoluene 65.6 J ug/L
MTBE - Methyl tertiary butyl ether MW-2 - p-Isopropyltoluene 134 J ug/L
NA - Not Analyzed MW-2R - p-Isopropyltoluene 43 J ug/L
GCLs - Gross Contamination Levels MW-4 - Styrene 63.8 J ug/L: p-Isopropyltoluene 41.4 J ug/L
NCAC - North Carolina Administrative Code MW-4R - Styrene 51.4 J ug/L
BOLD data represents levels above 2L
Highlighted data indicates level above GCLs
EDB - Ethylene Dibromide, reported as 1,2-Dibromoethane on Table 2
IPE-reported as Di-isopropyl ether on Table 2
NCAC 2L GCLs
NOT
LOCATED
MW-5SAMPLE ID MW-3 MW-4MW-2MW-1 MW-2R MW-4R
21-Jun-23
Table 2
Summary of Current Groundwater Analytical Data
(Former) SERVCO No. 01711
850 North Liberty Street
Winston-Salem, North Carolina
NCDEQ Incident No. 20966
Excel Project No. 24090
DATE SAMPLED
BENZENE 394 1,520 0.405 J 1,690 87.8 < 0.188 1 5,000
TOLUENE 792 3,860 < 0.278 < 55.6 8.84 J < 0.556 600 260,000
ETHYLBENZENE 278 544 < 0.137 60.8 J 42.5 < 0.274 600 84,500
TOTAL XYLENES 1,590 4,450 1.412 J 764 812 < 1.208 500 85,500
TOTAL BTEX 3,054 10,374 ~ 2.232 2,570 951.1 ~ 2.226 -- --
MTBE 10,900 31,800 8,090 < 20.2 101 < 0.202 20 20,000
DI-ISOPROPYL ETHER 43.2 J 124 J 29.2 < 21 4.77 J < 0.21 70 70,000
METHYLENE CHLORIDE < 86 245 J < 0.43 < 86 < 4.3 < 0.86 5 5,000
NAPHTHALENE 327 J < 500 < 1 < 200 48.3 J < 2 6 6,000
ACETONE < 2,260 < 5,650 < 11.3 < 2,260 < 113 < 22.6 6,000 6,000,000
n-BUTYLBENZENE < 31.4 < 78.5 < 0.157 < 31.4 4.48 J < 0.314 70 6,900
sec-BUTYLBENZENE < 25 < 62.5 0.157 J < 25 5.99 J < 0.25 70 8,500
1,2-DIBROMOETHANE 74.3 J < 63 < 0.126 < 25.2 < 1.26 < 0.252 0.02 50
1,2-DICHLOROETHANE < 16.4 < 40.9 0.184 J < 16.4 3.82 J < 0.164 0.4 400
ISOPROPYLBENZENE 28.9 J 59.9 J 0.748 J < 21 32.4 < 0.21 70 25,000
2-BUTANONE 522 J < 595 < 1.19 < 238 < 11.9 < 2.38 4,000 4,000,000
4-METHYL-2-PENTANONE 181 J < 239 < 0.478 < 95.6 < 4.78 < 0.956 100 100,000
n-PROPYLBENZENE 96.2 J 104 J 0.365 J < 19.9 16.7 < 0.199 70 30,000
1,2,4-TRIMETHYLBENZENE 971 1,080 0.371 J 111 J 240 < 0.644 400 28,500
1,3,5-TRIMETHYLBENZENE 435 269 J < 0.104 34.7 J 93.3 < 0.208 400 25,000
NOTES:Additional Constituents Reported for 6-23 Sampling:
Data in micrograms per liter or g/l MW-10 - p-Isopropyltoluene 9.08 J ug/L
MTBE - Methyl tertiary butyl ether
NA - Not Analyzed
GCLs - Gross Contamination Levels
NCAC - North Carolina Administrative Code
BOLD data represents levels above 2L
Highlighted data indicates level above GCLs
EDB - Ethylene Dibromide, reported as 1,2-Dibromoethane on Table 2
IPE-reported as Di-isopropyl ether on Table 2
NOT
LOCATED
MW-10 MW-11 MW-12
NOT
SAMPLED -
NOT IN
CURRENT
SOW
SAMPLE ID MW-13 NCAC 2L GCLsMW-6 MW-7 MW-8 MW-9
21-Jun-23
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
06/21/23 17,200 42,300 3,950 23,760 211,000 869 537 J < 25.2
10/12/17 3,650 28,700 4,340 24,800 7,620 < 160 991 < 190
3/21 - 12/22
06/21/23 13,100 52,700 4,980 27,370 99,700 408 J 1,000 J < 63
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
06/21/23 11,400 44,900 3,720 18,370 94,000 362 454 13.2 J
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
06/21/23 0.142 J < 0.278 < 0.137 < 0.604 1.4 < 0.105 < 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
6/21/23 1,080 13,600 1,390 9,030 78.5 J < 26.3 689 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
6/21/23 265 6,280 1,890 10,660 < 10.1 < 10.5 578 13.4 J
11/10 – 5/15 NOT SAMPLED – LNAPL OBSERVED
NOT SAMPLED - LNAPL OBSERVED3/17 - 10/17MW-4
MW-4R
NCAC 2L Standards
GCLs
NOT SAMPLED - NOT LOCATED
NOT SAMPLED – LNAPL OBSERVED
NOT SAMPLED - NOT LOCATED
NOT SAMPLED – LNAPL OBSERVED2/00 – 3/17
NOT SAMPLED - NOT LOCATED
MW-1
MW-2
MW-2R
MW-3
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
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
06/21/23 394 792 278 1,590 10,900 43.2 J 327 J 74.3 J
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
06/21/23 1,520 3,860 544 4,450 31,800 124 J < 500 < 63
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
06/21/23 0.405 J < 0.278 < 0.137 1.412 J 8,090 29.2 < 1 < 0.126
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
06/21/23 1,690 < 55.6 60.8 J 764 < 20.2 < 21 < 200 < 25.2
NOT SAMPLED – NOT LOCATED
NOT SAMPLED – NOT LOCATED
MW-6
MW-7
MW-8
MW-5
MW-9
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 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
06/21/23 87.8 8.84 J 42.5 812 101 4.77 J 48.3 J < 1.26
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
06/21/23 < 0.188 < 0.556 < 0.274 < 1.21 < 0.202 < 0.21 < 2 < 0.252
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-12
NOT LOCATED
MW-11
MW-13
MW-10
Electrical
Conductivity ORP
(µS/cm)
MW-1 5.63 0.285 274 5.05 18.98
MW-2 6.10 0.168 369 6.35 19.82
MW-2R 5.11 0.170 510 3.58 19.26
MW-3 7.43 0.153 297 8.41 20.38
MW-4 7.75 0.218 280 7.55 20.81
MW-4R 7.02 0.098 469 5.53 18.90
MW-5
MW-6 5.86 0.265 280 8.17 19.09
MW-7 5.50 0.336 348 8.86 19.10
MW-8 6.06 0.394 283 10.31 19.36
MW-9 5.19 0.378 235 7.26 18.93
MW-10 5.88 0.286 251 7.82 19.04
MW-11
MW-12
MW-13 6.21 0.068 208 6.70 19.17
µS/cm Microsiemens per centimeter
NS Not sampled, (Dry, Not Located, Destroyed, etc…)
Well
Identification
Sampling
Date (su)(0C)
Disolved
(ppm)
TABLE 4
FIELD MEASUREMENTS OF THE GROUNDWATER SAMPLES
(Former) Servco No. 01711
850 North Liberty Street, Winston-Salem, North Carolina
Excel Project No. 24090
Not Located
Not Located
6/21/23
Note Measured - Not in Current SOW

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 28054
PREPARED FOR :
PROJECT NO. :
Civil & Environmental Associates, PLLC
24090
MAP TITLE :
SCALE :
SERVICE DISTRIBUTING CO., INC.
850 NORTH LIBERTY STREET, WINSTON-SALEM, NC
(FORMER) SERVCO NO. 01711
ACL
DRAWN BY :
FIGURE 2 - SITE PLAN
DATE :
1" = 20'11/22/2021
Excel
MONITORING REPORT
PHONE : [phone] HUNTSMAN COURT, GASTONIA, NC 28054
PREPARED FOR :
PROJECT NO. :
Civil & Environmental Associates, PLLC
24090
MAP TITLE :
SCALE :
SERVICE DISTRIBUTING CO., INC.
850 NORTH LIBERTY STREET, WINSTON-SALEM, NC
(FORMER) SERVCO NO. 01711
ACL
DRAWN BY :
FIGURE 3 - GROUNDWATER CONTOUR MAP
DATE :
1" = 20'8/8/2023
Excel
MONITORING REPORT
PHONE : [phone] HUNTSMAN COURT, GASTONIA, NC 28054
PREPARED FOR :
PROJECT NO. :
Civil & Environmental Associates, PLLC
24090
MAP TITLE :
SCALE :
SERVICE DISTRIBUTING CO., INC.
850 NORTH LIBERTY STREET, WINSTON-SALEM, NC
(FORMER) SERVCO NO. 01711
ACL
DRAWN BY :
FIGURE 4 - APPROXIMATE LNAPL EXTENT MAP
DATE :
1" = 20'8/8/2023
Excel
MONITORING REPORT
PHONE : [phone] HUNTSMAN COURT, GASTONIA, NC 28054
PREPARED FOR :
PROJECT NO. :
Civil & Environmental Associates, PLLC
24090
MAP TITLE :
SCALE :
SERVICE DISTRIBUTING CO., INC.
850 NORTH LIBERTY STREET, WINSTON-SALEM, NC
(FORMER) SERVCO NO. 01711
ACL
DRAWN BY :
FIGURE 5 - GROUNDWATER CONSTITUENTS MAP
DATE :
1" = 20'8/8/2023
Excel
MONITORING REPORT
20,000
5,000

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
Sam lin Point ID:MW-1 MW-2R MW-3 MW-6 MW-7
Sampling Samplingventate
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 9.830 0.1270 2.0100
10 09/15/21 8.57000 0.00233 0.20800 1.6700
11 06/23/22 21.1000 0.0268 0.37200 6.33000
12 12/29/22 11.4000 0.0009 0.21500 1.71000
13 06/21/23 17.200 11.4000 0.00014 0.39400 1.520000
14
15
16
17
18
19
20
Coefficient of Variation:0.26 0.40 1.25 1.10 1.13
Mann-Kendall Statistic S :-2 3 -37 -36 -14Confidence Factor:54.0% 67.5% 99.8% 99.3% 81.0%
Concentration Trend:Stable No Trend 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 withou
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
arty 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)
3-Aug-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 11/36
Co
n
c
e
n
t
r
a
t
i
o
n

(
m
g
/
L
)
Sampling Date
MW-1
MW-2R
MW-3
MW-6
MW-7
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:mg/L
Sam lin Point ID:MW-1 MW-2R MW-3 MW-6 MW-7 MW-8
Sampling Samplingventate
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 81.200 6.6500 22.900
10 09/15/21 82.400 3.710 11.900 27.200
11 06/23/22 182.000 0.344 17.400 156.000
12 12/29/22 128.000 0.028 13.000 49.200
13 06/21/23 211.000 94.000 0.0014 10.900 31.800 8.0900
14
15
16
17
18
19
20
Coefficient of Variation:0.70 0.38 2.15 0.77 0.96 0.52
Mann-Kendall Statistic S :-2 4 -39 -44 14 -14Confidence Factor:54.0% 75.8% 99.9% 99.9% 81.0% 97.5%
Concentration Trend:Stable No Trend Decreasing Decreasing No Trend Decreasing
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 withou
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
arty 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
3-Aug-23 24090
Servco Winston-Salem MTBE
A. Long
0.001
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 11/36
Co
n
c
e
n
t
r
a
t
i
o
n

(
m
g
/
L
)
Sampling Date
MW-1
MW-2R
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
July 03, 2023
Excel Civil & Environmental Associates
Sample Delivery Group:L1628650
Samples Received:06/22/2023
Project Number:
Description:Servco 01711
Site:WINSTON SALEM, NC
Report To:Aaron Long
625 Huntsman Court
Gastonia, NC 28054
Entire Report Reviewed By:
July 03, 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
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July 03, 2023
Heather J Wagner
Project Manager
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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-1 L1628650-01 6
MW-2 L1628650-02 8
MW-2R L1628650-03 10
MW-3 L1628650-04 12
MW-4 L1628650-05 14
MW-4R L1628650-06 16
MW-6 L1628650-07 18
MW-7 L1628650-08 20
MW-8 L1628650-09 22
MW-9 L1628650-10 24
MW-10 L1628650-11 26
MW-13 L1628650-12 28
TRIP BLANK L1628650-13 30
Qc: Quality Control Summary 32
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 32
Gl: Glossary of Terms 47
Al: Accreditations & Locations 48
Sc: Sample Chain of Custody 49
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-1 L1628650-01 GW AL 06/21/23 14:00 06/22/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2085227 200 06/27/23 20:05 06/27/23 20:05 JHH Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2085949 5000 06/29/23 05:19 06/29/23 05:19 JBE Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-2 L1628650-02 GW AL 06/21/23 13:15 06/22/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2085227 500 06/27/23 20:27 06/27/23 20:27 JBE Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2085949 500 06/29/23 05:41 06/29/23 05:41 JBE Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-2R L1628650-03 GW AL 06/21/23 13:30 06/22/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2085227 50 06/27/23 20:48 06/27/23 20:48 JBE Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2085949 2500 06/29/23 06:02 06/29/23 06:02 JBE Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-3 L1628650-04 GW AL 06/21/23 12:50 06/22/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2085949 1 06/29/23 01:05 06/29/23 01:05 JBE Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-4 L1628650-05 GW AL 06/21/23 12:40 06/22/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2085227 250 06/27/23 21:31 06/27/23 21:31 JBE Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2085949 250 06/29/23 06:23 06/29/23 06:23 JBE Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-4R L1628650-06 GW AL 06/21/23 13:45 06/22/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2085849 100 06/28/23 17:08 06/28/23 17:08 JAH Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-6 L1628650-07 GW AL 06/21/23 15:00 06/22/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2085849 200 06/28/23 17:30 06/28/23 17:30 JAH Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-7 L1628650-08 GW AL 06/21/23 14:20 06/22/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2085849 500 06/28/23 17:51 06/28/23 17:51 JAH 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-8 L1628650-09 GW AL 06/21/23 15:40 06/22/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2085849 1 06/28/23 16:04 06/28/23 16:04 JAH Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2087771 200 07/01/23 14:31 07/01/23 14:31 ACG Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-9 L1628650-10 GW AL 06/21/23 14:30 06/22/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2085849 200 06/28/23 18:13 06/28/23 18:13 JAH Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-10 L1628650-11 GW AL 06/21/23 14:45 06/22/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2085849 10 06/28/23 18:34 06/28/23 18:34 JAH Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-13 L1628650-12 GW AL 06/21/23 15:15 06/22/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2085849 2 06/28/23 16:25 06/28/23 16:25 JAH Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2087771 2 07/01/23 14:09 07/01/23 14:09 ACG Mt. Juliet, TN
Collected by Collected date/time Received date/time
TRIP BLANK L1628650-13 GW AL 06/21/23 00:00 06/22/23 09:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG2085849 1 06/28/23 12:28 06/28/23 12:28 JAH 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
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Heather J Wagner
Project Manager
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SAMPLE RESULTS - 01
L1628650
MW-1
Collected date/time: 06/21/23 14:00
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 2260 10000 200 06/27/2023 20:05 WG2085227
Acrolein U 508 10000 200 06/27/2023 20:05 WG2085227
Acrylonitrile U 134 2000 200 06/27/2023 20:05 WG2085227
Benzene 17200 18.8 200 200 06/27/2023 20:05 WG2085227
Bromobenzene U 23.6 200 200 06/27/2023 20:05 WG2085227
Bromodichloromethane U 27.2 200 200 06/27/2023 20:05 WG2085227
Bromoform U 25.8 200 200 06/27/2023 20:05 WG2085227
Bromomethane U 121 1000 200 06/27/2023 20:05 WG2085227
n-Butylbenzene U 31.4 200 200 06/27/2023 20:05 WG2085227
sec-Butylbenzene U 25.0 200 200 06/27/2023 20:05 WG2085227
tert-Butylbenzene U 25.4 200 200 06/27/2023 20:05 WG2085227
Carbon tetrachloride U 25.6 200 200 06/27/2023 20:05 WG2085227
Chlorobenzene U 23.2 200 200 06/27/2023 20:05 WG2085227
Chlorodibromomethane U 28.0 200 200 06/27/2023 20:05 WG2085227
Chloroethane U 38.4 1000 200 06/27/2023 20:05 WG2085227
Chloroform U 22.2 1000 200 06/27/2023 20:05 WG2085227
Chloromethane U 192 500 200 06/27/2023 20:05 WG2085227
2-Chlorotoluene U 21.2 200 200 06/27/2023 20:05 WG2085227
4-Chlorotoluene U 22.8 200 200 06/27/2023 20:05 WG2085227
1,2-Dibromo-3-Chloropropane U 55.2 1000 200 06/27/2023 20:05 WG2085227
1,2-Dibromoethane U 25.2 200 200 06/27/2023 20:05 WG2085227
Dibromomethane U 24.4 200 200 06/27/2023 20:05 WG2085227
1,2-Dichlorobenzene U 21.4 200 200 06/27/2023 20:05 WG2085227
1,3-Dichlorobenzene U 22.0 200 200 06/27/2023 20:05 WG2085227
1,4-Dichlorobenzene U 24.0 200 200 06/27/2023 20:05 WG2085227
Dichlorodifluoromethane U 74.8 1000 200 06/27/2023 20:05 WG2085227
1,1-Dichloroethane U 20.0 200 200 06/27/2023 20:05 WG2085227
1,2-Dichloroethane 30.4 J 16.4 200 200 06/27/2023 20:05 WG2085227
1,1-Dichloroethene U 37.6 200 200 06/27/2023 20:05 WG2085227
cis-1,2-Dichloroethene U 630 5000 5000 06/29/2023 05:19 WG2085949
trans-1,2-Dichloroethene U 29.8 200 200 06/27/2023 20:05 WG2085227
1,2-Dichloropropane U 29.8 200 200 06/27/2023 20:05 WG2085227
1,1-Dichloropropene U 28.4 200 200 06/27/2023 20:05 WG2085227
1,3-Dichloropropane U 22.0 200 200 06/27/2023 20:05 WG2085227
2,2-Dichloropropane U 32.2 200 200 06/27/2023 20:05 WG2085227
Di-isopropyl ether 869 21.0 200 200 06/27/2023 20:05 WG2085227
Ethylbenzene 3950 27.4 200 200 06/27/2023 20:05 WG2085227
Hexachloro-1,3-butadiene U 67.4 200 200 06/27/2023 20:05 WG2085227
Isopropylbenzene 154 J 21.0 200 200 06/27/2023 20:05 WG2085227
p-Isopropyltoluene 65.6 J 24.0 200 200 06/27/2023 20:05 WG2085227
2-Butanone (MEK)761 J 238 2000 200 06/27/2023 20:05 WG2085227
Methylene Chloride U 86.0 1000 200 06/27/2023 20:05 WG2085227
4-Methyl-2-pentanone (MIBK)172 J 95.6 2000 200 06/27/2023 20:05 WG2085227
Methyl tert-butyl ether 211000 505 5000 5000 06/29/2023 05:19 WG2085949
Naphthalene 537 J 200 1000 200 06/27/2023 20:05 WG2085227
n-Propylbenzene 338 19.9 200 200 06/27/2023 20:05 WG2085227
Styrene U 23.6 200 200 06/27/2023 20:05 WG2085227
1,1,1,2-Tetrachloroethane U 29.4 200 200 06/27/2023 20:05 WG2085227
1,1,2,2-Tetrachloroethane 32.9 J 26.6 200 200 06/27/2023 20:05 WG2085227
Tetrachloroethene U 60.0 200 200 06/27/2023 20:05 WG2085227
Toluene 42300 1390 5000 5000 06/29/2023 05:19 WG2085949
1,2,3-Trichlorobenzene U 46.0 200 200 06/27/2023 20:05 WG2085227
1,2,4-Trichlorobenzene U 96.2 200 200 06/27/2023 20:05 WG2085227
1,1,1-Trichloroethane U 29.8 200 200 06/27/2023 20:05 WG2085227
1,1,2-Trichloroethane U 31.6 200 200 06/27/2023 20:05 WG2085227
Trichloroethene U 950 5000 5000 06/29/2023 05:19 WG2085949
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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SAMPLE RESULTS - 01
L1628650
MW-1
Collected date/time: 06/21/23 14:00
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 32.0 1000 200 06/27/2023 20:05 WG2085227
1,2,3-Trichloropropane U 47.4 500 200 06/27/2023 20:05 WG2085227
1,2,4-Trimethylbenzene 3320 64.4 200 200 06/27/2023 20:05 WG2085227
1,3,5-Trimethylbenzene 993 20.8 200 200 06/27/2023 20:05 WG2085227
Vinyl chloride U 46.8 200 200 06/27/2023 20:05 WG2085227
o-Xylene 8160 34.8 200 200 06/27/2023 20:05 WG2085227
m&p-Xylenes 15600 86.0 400 200 06/27/2023 20:05 WG2085227
(S) Toluene-d8 109 80.0-120 06/27/2023 20:05 WG2085227
(S) Toluene-d8 113 80.0-120 06/29/2023 05:19 WG2085949
(S) 4-Bromofluorobenzene 115 77.0-126 06/27/2023 20:05 WG2085227
(S) 4-Bromofluorobenzene 114 77.0-126 06/29/2023 05:19 WG2085949
(S) 1,2-Dichloroethane-d4 111 70.0-130 06/27/2023 20:05 WG2085227
(S) 1,2-Dichloroethane-d4 106 70.0-130 06/29/2023 05:19 WG2085949
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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SAMPLE RESULTS - 02
L1628650
MW-2
Collected date/time: 06/21/23 13:15
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone U 5650 25000 500 06/27/2023 20:27 WG2085227
Acrolein U 1270 25000 500 06/27/2023 20:27 WG2085227
Acrylonitrile U 336 5000 500 06/27/2023 20:27 WG2085227
Benzene 13100 47.1 500 500 06/27/2023 20:27 WG2085227
Bromobenzene U 59.0 500 500 06/27/2023 20:27 WG2085227
Bromodichloromethane U 68.0 500 500 06/27/2023 20:27 WG2085227
Bromoform U 64.5 500 500 06/27/2023 20:27 WG2085227
Bromomethane U 303 2500 500 06/27/2023 20:27 WG2085227
n-Butylbenzene U 78.5 500 500 06/27/2023 20:27 WG2085227
sec-Butylbenzene U 62.5 500 500 06/27/2023 20:27 WG2085227
tert-Butylbenzene U 63.5 500 500 06/27/2023 20:27 WG2085227
Carbon tetrachloride U 64.0 500 500 06/27/2023 20:27 WG2085227
Chlorobenzene U 58.0 500 500 06/27/2023 20:27 WG2085227
Chlorodibromomethane U 70.0 500 500 06/27/2023 20:27 WG2085227
Chloroethane U 96.0 2500 500 06/27/2023 20:27 WG2085227
Chloroform U 55.5 2500 500 06/27/2023 20:27 WG2085227
Chloromethane U 480 1250 500 06/27/2023 20:27 WG2085227
2-Chlorotoluene U 53.0 500 500 06/27/2023 20:27 WG2085227
4-Chlorotoluene U 57.0 500 500 06/27/2023 20:27 WG2085227
1,2-Dibromo-3-Chloropropane U 138 2500 500 06/27/2023 20:27 WG2085227
1,2-Dibromoethane U 63.0 500 500 06/27/2023 20:27 WG2085227
Dibromomethane U 61.0 500 500 06/27/2023 20:27 WG2085227
1,2-Dichlorobenzene U 53.5 500 500 06/27/2023 20:27 WG2085227
1,3-Dichlorobenzene U 55.0 500 500 06/27/2023 20:27 WG2085227
1,4-Dichlorobenzene U 60.0 500 500 06/27/2023 20:27 WG2085227
Dichlorodifluoromethane U 187 2500 500 06/27/2023 20:27 WG2085227
1,1-Dichloroethane U 50.0 500 500 06/27/2023 20:27 WG2085227
1,2-Dichloroethane 79.6 J 40.9 500 500 06/27/2023 20:27 WG2085227
1,1-Dichloroethene U 94.0 500 500 06/27/2023 20:27 WG2085227
cis-1,2-Dichloroethene U 63.0 500 500 06/29/2023 05:41 WG2085949
trans-1,2-Dichloroethene U 74.5 500 500 06/27/2023 20:27 WG2085227
1,2-Dichloropropane U 74.5 500 500 06/27/2023 20:27 WG2085227
1,1-Dichloropropene U 71.0 500 500 06/27/2023 20:27 WG2085227
1,3-Dichloropropane U 55.0 500 500 06/27/2023 20:27 WG2085227
2,2-Dichloropropane U 80.5 500 500 06/27/2023 20:27 WG2085227
Di-isopropyl ether 408 J 52.5 500 500 06/27/2023 20:27 WG2085227
Ethylbenzene 4980 68.5 500 500 06/27/2023 20:27 WG2085227
Hexachloro-1,3-butadiene U 169 500 500 06/27/2023 20:27 WG2085227
Isopropylbenzene 273 J 52.5 500 500 06/27/2023 20:27 WG2085227
p-Isopropyltoluene 134 J 60.0 500 500 06/27/2023 20:27 WG2085227
2-Butanone (MEK)U 595 5000 500 06/27/2023 20:27 WG2085227
Methylene Chloride U 215 2500 500 06/27/2023 20:27 WG2085227
4-Methyl-2-pentanone (MIBK)U 239 5000 500 06/27/2023 20:27 WG2085227
Methyl tert-butyl ether 99700 50.5 500 500 06/27/2023 20:27 WG2085227
Naphthalene 1000 J 500 2500 500 06/27/2023 20:27 WG2085227
n-Propylbenzene 699 49.7 500 500 06/27/2023 20:27 WG2085227
Styrene U 59.0 500 500 06/27/2023 20:27 WG2085227
1,1,1,2-Tetrachloroethane U 73.5 500 500 06/27/2023 20:27 WG2085227
1,1,2,2-Tetrachloroethane U 66.5 500 500 06/27/2023 20:27 WG2085227
Tetrachloroethene U 150 500 500 06/27/2023 20:27 WG2085227
Toluene 52700 139 500 500 06/27/2023 20:27 WG2085227
1,2,3-Trichlorobenzene U 115 500 500 06/27/2023 20:27 WG2085227
1,2,4-Trichlorobenzene U 241 500 500 06/27/2023 20:27 WG2085227
1,1,1-Trichloroethane U 74.5 500 500 06/27/2023 20:27 WG2085227
1,1,2-Trichloroethane U 79.0 500 500 06/27/2023 20:27 WG2085227
Trichloroethene U 95.0 500 500 06/29/2023 05:41 WG2085949
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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SAMPLE RESULTS - 02
L1628650
MW-2
Collected date/time: 06/21/23 13:15
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 80.0 2500 500 06/27/2023 20:27 WG2085227
1,2,3-Trichloropropane U 119 1250 500 06/27/2023 20:27 WG2085227
1,2,4-Trimethylbenzene 5210 161 500 500 06/27/2023 20:27 WG2085227
1,3,5-Trimethylbenzene 1420 52.0 500 500 06/27/2023 20:27 WG2085227
Vinyl chloride U 117 500 500 06/27/2023 20:27 WG2085227
o-Xylene 8870 87.0 500 500 06/27/2023 20:27 WG2085227
m&p-Xylenes 18500 215 1000 500 06/27/2023 20:27 WG2085227
(S) Toluene-d8 112 80.0-120 06/27/2023 20:27 WG2085227
(S) Toluene-d8 110 80.0-120 06/29/2023 05:41 WG2085949
(S) 4-Bromofluorobenzene 109 77.0-126 06/27/2023 20:27 WG2085227
(S) 4-Bromofluorobenzene 112 77.0-126 06/29/2023 05:41 WG2085949
(S) 1,2-Dichloroethane-d4 110 70.0-130 06/27/2023 20:27 WG2085227
(S) 1,2-Dichloroethane-d4 105 70.0-130 06/29/2023 05:41 WG2085949
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:33 9 of 50
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:53 9 of 50
SAMPLE RESULTS - 03
L1628650
MW-2R
Collected date/time: 06/21/23 13:30
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 565 2500 50 06/27/2023 20:48 WG2085227
Acrolein U 127 2500 50 06/27/2023 20:48 WG2085227
Acrylonitrile U 33.6 500 50 06/27/2023 20:48 WG2085227
Benzene 11400 235 2500 2500 06/29/2023 06:02 WG2085949
Bromobenzene U 5.90 50.0 50 06/27/2023 20:48 WG2085227
Bromodichloromethane U 6.80 50.0 50 06/27/2023 20:48 WG2085227
Bromoform U 6.45 50.0 50 06/27/2023 20:48 WG2085227
Bromomethane U 30.3 250 50 06/27/2023 20:48 WG2085227
n-Butylbenzene U 7.85 50.0 50 06/27/2023 20:48 WG2085227
sec-Butylbenzene 24.1 J 6.25 50.0 50 06/27/2023 20:48 WG2085227
tert-Butylbenzene U 6.35 50.0 50 06/27/2023 20:48 WG2085227
Carbon tetrachloride U 6.40 50.0 50 06/27/2023 20:48 WG2085227
Chlorobenzene U 5.80 50.0 50 06/27/2023 20:48 WG2085227
Chlorodibromomethane U 7.00 50.0 50 06/27/2023 20:48 WG2085227
Chloroethane U 9.60 250 50 06/27/2023 20:48 WG2085227
Chloroform 18.7 J 5.55 250 50 06/27/2023 20:48 WG2085227
Chloromethane U 48.0 125 50 06/27/2023 20:48 WG2085227
2-Chlorotoluene U 5.30 50.0 50 06/27/2023 20:48 WG2085227
4-Chlorotoluene U 5.70 50.0 50 06/27/2023 20:48 WG2085227
1,2-Dibromo-3-Chloropropane U 13.8 250 50 06/27/2023 20:48 WG2085227
1,2-Dibromoethane 13.2 J 6.30 50.0 50 06/27/2023 20:48 WG2085227
Dibromomethane U 6.10 50.0 50 06/27/2023 20:48 WG2085227
1,2-Dichlorobenzene U 5.35 50.0 50 06/27/2023 20:48 WG2085227
1,3-Dichlorobenzene U 5.50 50.0 50 06/27/2023 20:48 WG2085227
1,4-Dichlorobenzene U 6.00 50.0 50 06/27/2023 20:48 WG2085227
Dichlorodifluoromethane U 18.7 250 50 06/27/2023 20:48 WG2085227
1,1-Dichloroethane U 5.00 50.0 50 06/27/2023 20:48 WG2085227
1,2-Dichloroethane 53.7 4.09 50.0 50 06/27/2023 20:48 WG2085227
1,1-Dichloroethene U 9.40 50.0 50 06/27/2023 20:48 WG2085227
cis-1,2-Dichloroethene U 315 2500 2500 06/29/2023 06:02 WG2085949
trans-1,2-Dichloroethene U 7.45 50.0 50 06/27/2023 20:48 WG2085227
1,2-Dichloropropane U 7.45 50.0 50 06/27/2023 20:48 WG2085227
1,1-Dichloropropene U 7.10 50.0 50 06/27/2023 20:48 WG2085227
1,3-Dichloropropane U 5.50 50.0 50 06/27/2023 20:48 WG2085227
2,2-Dichloropropane U 8.05 50.0 50 06/27/2023 20:48 WG2085227
Di-isopropyl ether 362 5.25 50.0 50 06/27/2023 20:48 WG2085227
Ethylbenzene 3720 6.85 50.0 50 06/27/2023 20:48 WG2085227
Hexachloro-1,3-butadiene U 16.9 50.0 50 06/27/2023 20:48 WG2085227
Isopropylbenzene 138 5.25 50.0 50 06/27/2023 20:48 WG2085227
p-Isopropyltoluene 43.0 J 6.00 50.0 50 06/27/2023 20:48 WG2085227
2-Butanone (MEK)452 J 59.5 500 50 06/27/2023 20:48 WG2085227
Methylene Chloride U 21.5 250 50 06/27/2023 20:48 WG2085227
4-Methyl-2-pentanone (MIBK)257 J 23.9 500 50 06/27/2023 20:48 WG2085227
Methyl tert-butyl ether 94000 253 2500 2500 06/29/2023 06:02 WG2085949
Naphthalene 454 50.0 250 50 06/27/2023 20:48 WG2085227
n-Propylbenzene 361 4.97 50.0 50 06/27/2023 20:48 WG2085227
Styrene U 5.90 50.0 50 06/27/2023 20:48 WG2085227
1,1,1,2-Tetrachloroethane U 7.35 50.0 50 06/27/2023 20:48 WG2085227
1,1,2,2-Tetrachloroethane U 6.65 50.0 50 06/27/2023 20:48 WG2085227
Tetrachloroethene U 15.0 50.0 50 06/27/2023 20:48 WG2085227
Toluene 44900 695 2500 2500 06/29/2023 06:02 WG2085949
1,2,3-Trichlorobenzene U 11.5 50.0 50 06/27/2023 20:48 WG2085227
1,2,4-Trichlorobenzene U 24.1 50.0 50 06/27/2023 20:48 WG2085227
1,1,1-Trichloroethane U 7.45 50.0 50 06/27/2023 20:48 WG2085227
1,1,2-Trichloroethane U 7.90 50.0 50 06/27/2023 20:48 WG2085227
Trichloroethene U 475 2500 2500 06/29/2023 06:02 WG2085949
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:33 10 of 50
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:53 10 of 50
SAMPLE RESULTS - 03
L1628650
MW-2R
Collected date/time: 06/21/23 13:30
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 8.00 250 50 06/27/2023 20:48 WG2085227
1,2,3-Trichloropropane U 11.9 125 50 06/27/2023 20:48 WG2085227
1,2,4-Trimethylbenzene 2600 16.1 50.0 50 06/27/2023 20:48 WG2085227
1,3,5-Trimethylbenzene 652 5.20 50.0 50 06/27/2023 20:48 WG2085227
Vinyl chloride U 11.7 50.0 50 06/27/2023 20:48 WG2085227
o-Xylene 5970 8.70 50.0 50 06/27/2023 20:48 WG2085227
m&p-Xylenes 12400 21.5 100 50 06/27/2023 20:48 WG2085227
(S) Toluene-d8 106 80.0-120 06/27/2023 20:48 WG2085227
(S) Toluene-d8 113 80.0-120 06/29/2023 06:02 WG2085949
(S) 4-Bromofluorobenzene 110 77.0-126 06/27/2023 20:48 WG2085227
(S) 4-Bromofluorobenzene 110 77.0-126 06/29/2023 06:02 WG2085949
(S) 1,2-Dichloroethane-d4 108 70.0-130 06/27/2023 20:48 WG2085227
(S) 1,2-Dichloroethane-d4 102 70.0-130 06/29/2023 06:02 WG2085949
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:33 11 of 50
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:53 11 of 50
SAMPLE RESULTS - 04
L1628650
MW-3
Collected date/time: 06/21/23 12:50
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 06/29/2023 01:05 WG2085949
Acrolein U 2.54 50.0 1 06/29/2023 01:05 WG2085949
Acrylonitrile U 0.671 10.0 1 06/29/2023 01:05 WG2085949
Benzene 0.142 J 0.0941 1.00 1 06/29/2023 01:05 WG2085949
Bromobenzene U 0.118 1.00 1 06/29/2023 01:05 WG2085949
Bromodichloromethane U 0.136 1.00 1 06/29/2023 01:05 WG2085949
Bromoform U 0.129 1.00 1 06/29/2023 01:05 WG2085949
Bromomethane U 0.605 5.00 1 06/29/2023 01:05 WG2085949
n-Butylbenzene U 0.157 1.00 1 06/29/2023 01:05 WG2085949
sec-Butylbenzene U 0.125 1.00 1 06/29/2023 01:05 WG2085949
tert-Butylbenzene U 0.127 1.00 1 06/29/2023 01:05 WG2085949
Carbon tetrachloride U 0.128 1.00 1 06/29/2023 01:05 WG2085949
Chlorobenzene U 0.116 1.00 1 06/29/2023 01:05 WG2085949
Chlorodibromomethane U 0.140 1.00 1 06/29/2023 01:05 WG2085949
Chloroethane U 0.192 5.00 1 06/29/2023 01:05 WG2085949
Chloroform U 0.111 5.00 1 06/29/2023 01:05 WG2085949
Chloromethane U 0.960 2.50 1 06/29/2023 01:05 WG2085949
2-Chlorotoluene U 0.106 1.00 1 06/29/2023 01:05 WG2085949
4-Chlorotoluene U 0.114 1.00 1 06/29/2023 01:05 WG2085949
1,2-Dibromo-3-Chloropropane U 0.276 5.00 1 06/29/2023 01:05 WG2085949
1,2-Dibromoethane U 0.126 1.00 1 06/29/2023 01:05 WG2085949
Dibromomethane U 0.122 1.00 1 06/29/2023 01:05 WG2085949
1,2-Dichlorobenzene U 0.107 1.00 1 06/29/2023 01:05 WG2085949
1,3-Dichlorobenzene U 0.110 1.00 1 06/29/2023 01:05 WG2085949
1,4-Dichlorobenzene U 0.120 1.00 1 06/29/2023 01:05 WG2085949
Dichlorodifluoromethane U 0.374 5.00 1 06/29/2023 01:05 WG2085949
1,1-Dichloroethane U 0.100 1.00 1 06/29/2023 01:05 WG2085949
1,2-Dichloroethane U 0.0819 1.00 1 06/29/2023 01:05 WG2085949
1,1-Dichloroethene U 0.188 1.00 1 06/29/2023 01:05 WG2085949
cis-1,2-Dichloroethene U 0.126 1.00 1 06/29/2023 01:05 WG2085949
trans-1,2-Dichloroethene U 0.149 1.00 1 06/29/2023 01:05 WG2085949
1,2-Dichloropropane U 0.149 1.00 1 06/29/2023 01:05 WG2085949
1,1-Dichloropropene U 0.142 1.00 1 06/29/2023 01:05 WG2085949
1,3-Dichloropropane U 0.110 1.00 1 06/29/2023 01:05 WG2085949
2,2-Dichloropropane U 0.161 1.00 1 06/29/2023 01:05 WG2085949
Di-isopropyl ether U 0.105 1.00 1 06/29/2023 01:05 WG2085949
Ethylbenzene U 0.137 1.00 1 06/29/2023 01:05 WG2085949
Hexachloro-1,3-butadiene U 0.337 1.00 1 06/29/2023 01:05 WG2085949
Isopropylbenzene U 0.105 1.00 1 06/29/2023 01:05 WG2085949
p-Isopropyltoluene U 0.120 1.00 1 06/29/2023 01:05 WG2085949
2-Butanone (MEK)U 1.19 10.0 1 06/29/2023 01:05 WG2085949
Methylene Chloride U 0.430 5.00 1 06/29/2023 01:05 WG2085949
4-Methyl-2-pentanone (MIBK)U 0.478 10.0 1 06/29/2023 01:05 WG2085949
Methyl tert-butyl ether 1.40 0.101 1.00 1 06/29/2023 01:05 WG2085949
Naphthalene U 1.00 5.00 1 06/29/2023 01:05 WG2085949
n-Propylbenzene U 0.0993 1.00 1 06/29/2023 01:05 WG2085949
Styrene U 0.118 1.00 1 06/29/2023 01:05 WG2085949
1,1,1,2-Tetrachloroethane U 0.147 1.00 1 06/29/2023 01:05 WG2085949
1,1,2,2-Tetrachloroethane U 0.133 1.00 1 06/29/2023 01:05 WG2085949
Tetrachloroethene U 0.300 1.00 1 06/29/2023 01:05 WG2085949
Toluene U 0.278 1.00 1 06/29/2023 01:05 WG2085949
1,2,3-Trichlorobenzene U 0.230 1.00 1 06/29/2023 01:05 WG2085949
1,2,4-Trichlorobenzene U 0.481 1.00 1 06/29/2023 01:05 WG2085949
1,1,1-Trichloroethane U 0.149 1.00 1 06/29/2023 01:05 WG2085949
1,1,2-Trichloroethane U 0.158 1.00 1 06/29/2023 01:05 WG2085949
Trichloroethene U 0.190 1.00 1 06/29/2023 01:05 WG2085949
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:33 12 of 50
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:53 12 of 50
SAMPLE RESULTS - 04
L1628650
MW-3
Collected date/time: 06/21/23 12:50
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 06/29/2023 01:05 WG2085949
1,2,3-Trichloropropane U 0.237 2.50 1 06/29/2023 01:05 WG2085949
1,2,4-Trimethylbenzene U 0.322 1.00 1 06/29/2023 01:05 WG2085949
1,3,5-Trimethylbenzene U 0.104 1.00 1 06/29/2023 01:05 WG2085949
Vinyl chloride U 0.234 1.00 1 06/29/2023 01:05 WG2085949
o-Xylene U 0.174 1.00 1 06/29/2023 01:05 WG2085949
m&p-Xylenes U 0.430 2.00 1 06/29/2023 01:05 WG2085949
(S) Toluene-d8 116 80.0-120 06/29/2023 01:05 WG2085949
(S) 4-Bromofluorobenzene 113 77.0-126 06/29/2023 01:05 WG2085949
(S) 1,2-Dichloroethane-d4 106 70.0-130 06/29/2023 01:05 WG2085949
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:33 13 of 50
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:53 13 of 50
SAMPLE RESULTS - 05
L1628650
MW-4
Collected date/time: 06/21/23 12:40
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone U 2820 12500 250 06/27/2023 21:31 WG2085227
Acrolein U 635 12500 250 06/27/2023 21:31 WG2085227
Acrylonitrile U 168 2500 250 06/27/2023 21:31 WG2085227
Benzene 1080 23.5 250 250 06/27/2023 21:31 WG2085227
Bromobenzene U 29.5 250 250 06/27/2023 21:31 WG2085227
Bromodichloromethane U 34.0 250 250 06/27/2023 21:31 WG2085227
Bromoform U 32.3 250 250 06/27/2023 21:31 WG2085227
Bromomethane U 151 1250 250 06/27/2023 21:31 WG2085227
n-Butylbenzene U 39.3 250 250 06/27/2023 21:31 WG2085227
sec-Butylbenzene U 31.3 250 250 06/27/2023 21:31 WG2085227
tert-Butylbenzene U 31.8 250 250 06/27/2023 21:31 WG2085227
Carbon tetrachloride U 32.0 250 250 06/27/2023 21:31 WG2085227
Chlorobenzene U 29.0 250 250 06/27/2023 21:31 WG2085227
Chlorodibromomethane U 35.0 250 250 06/27/2023 21:31 WG2085227
Chloroethane U 48.0 1250 250 06/27/2023 21:31 WG2085227
Chloroform U 27.8 1250 250 06/27/2023 21:31 WG2085227
Chloromethane U 240 625 250 06/27/2023 21:31 WG2085227
2-Chlorotoluene U 26.5 250 250 06/27/2023 21:31 WG2085227
4-Chlorotoluene U 28.5 250 250 06/27/2023 21:31 WG2085227
1,2-Dibromo-3-Chloropropane U 69.0 1250 250 06/27/2023 21:31 WG2085227
1,2-Dibromoethane U 31.5 250 250 06/27/2023 21:31 WG2085227
Dibromomethane U 30.5 250 250 06/27/2023 21:31 WG2085227
1,2-Dichlorobenzene U 26.8 250 250 06/27/2023 21:31 WG2085227
1,3-Dichlorobenzene U 27.5 250 250 06/27/2023 21:31 WG2085227
1,4-Dichlorobenzene U 30.0 250 250 06/27/2023 21:31 WG2085227
Dichlorodifluoromethane U 93.5 1250 250 06/27/2023 21:31 WG2085227
1,1-Dichloroethane U 25.0 250 250 06/27/2023 21:31 WG2085227
1,2-Dichloroethane U 20.5 250 250 06/27/2023 21:31 WG2085227
1,1-Dichloroethene U 47.0 250 250 06/27/2023 21:31 WG2085227
cis-1,2-Dichloroethene U 31.5 250 250 06/29/2023 06:23 WG2085949
trans-1,2-Dichloroethene U 37.3 250 250 06/27/2023 21:31 WG2085227
1,2-Dichloropropane U 37.3 250 250 06/27/2023 21:31 WG2085227
1,1-Dichloropropene U 35.5 250 250 06/27/2023 21:31 WG2085227
1,3-Dichloropropane U 27.5 250 250 06/27/2023 21:31 WG2085227
2,2-Dichloropropane U 40.3 250 250 06/27/2023 21:31 WG2085227
Di-isopropyl ether U 26.3 250 250 06/27/2023 21:31 WG2085227
Ethylbenzene 1390 34.3 250 250 06/27/2023 21:31 WG2085227
Hexachloro-1,3-butadiene U 84.3 250 250 06/27/2023 21:31 WG2085227
Isopropylbenzene 82.9 J 26.3 250 250 06/27/2023 21:31 WG2085227
p-Isopropyltoluene 41.4 J 30.0 250 250 06/27/2023 21:31 WG2085227
2-Butanone (MEK)U 298 2500 250 06/27/2023 21:31 WG2085227
Methylene Chloride U 108 1250 250 06/27/2023 21:31 WG2085227
4-Methyl-2-pentanone (MIBK)U 120 2500 250 06/27/2023 21:31 WG2085227
Methyl tert-butyl ether 78.5 J 25.3 250 250 06/29/2023 06:23 WG2085949
Naphthalene 689 J 250 1250 250 06/27/2023 21:31 WG2085227
n-Propylbenzene 206 J 24.8 250 250 06/27/2023 21:31 WG2085227
Styrene 63.8 J 29.5 250 250 06/27/2023 21:31 WG2085227
1,1,1,2-Tetrachloroethane U 36.8 250 250 06/27/2023 21:31 WG2085227
1,1,2,2-Tetrachloroethane U 33.3 250 250 06/27/2023 21:31 WG2085227
Tetrachloroethene U 75.0 250 250 06/27/2023 21:31 WG2085227
Toluene 13600 69.5 250 250 06/27/2023 21:31 WG2085227
1,2,3-Trichlorobenzene U 57.5 250 250 06/27/2023 21:31 WG2085227
1,2,4-Trichlorobenzene U 120 250 250 06/27/2023 21:31 WG2085227
1,1,1-Trichloroethane U 37.3 250 250 06/27/2023 21:31 WG2085227
1,1,2-Trichloroethane U 39.5 250 250 06/27/2023 21:31 WG2085227
Trichloroethene U 47.5 250 250 06/27/2023 21:31 WG2085227
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:33 14 of 50
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:53 14 of 50
SAMPLE RESULTS - 05
L1628650
MW-4
Collected date/time: 06/21/23 12:40
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 40.0 1250 250 06/27/2023 21:31 WG2085227
1,2,3-Trichloropropane U 59.3 625 250 06/27/2023 21:31 WG2085227
1,2,4-Trimethylbenzene 2250 80.5 250 250 06/27/2023 21:31 WG2085227
1,3,5-Trimethylbenzene 651 26.0 250 250 06/27/2023 21:31 WG2085227
Vinyl chloride U 58.5 250 250 06/27/2023 21:31 WG2085227
o-Xylene 2780 43.5 250 250 06/27/2023 21:31 WG2085227
m&p-Xylenes 6250 108 500 250 06/27/2023 21:31 WG2085227
(S) Toluene-d8 111 80.0-120 06/27/2023 21:31 WG2085227
(S) Toluene-d8 112 80.0-120 06/29/2023 06:23 WG2085949
(S) 4-Bromofluorobenzene 113 77.0-126 06/27/2023 21:31 WG2085227
(S) 4-Bromofluorobenzene 115 77.0-126 06/29/2023 06:23 WG2085949
(S) 1,2-Dichloroethane-d4 109 70.0-130 06/27/2023 21:31 WG2085227
(S) 1,2-Dichloroethane-d4 103 70.0-130 06/29/2023 06:23 WG2085949
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:33 15 of 50
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:53 15 of 50
SAMPLE RESULTS - 06
L1628650
MW-4R
Collected date/time: 06/21/23 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 1130 5000 100 06/28/2023 17:08 WG2085849
Acrolein U 254 5000 100 06/28/2023 17:08 WG2085849
Acrylonitrile U 67.1 1000 100 06/28/2023 17:08 WG2085849
Benzene 265 9.41 100 100 06/28/2023 17:08 WG2085849
Bromobenzene U 11.8 100 100 06/28/2023 17:08 WG2085849
Bromodichloromethane U 13.6 100 100 06/28/2023 17:08 WG2085849
Bromoform U 12.9 100 100 06/28/2023 17:08 WG2085849
Bromomethane U 60.5 500 100 06/28/2023 17:08 WG2085849
n-Butylbenzene U 15.7 100 100 06/28/2023 17:08 WG2085849
sec-Butylbenzene U 12.5 100 100 06/28/2023 17:08 WG2085849
tert-Butylbenzene U 12.7 100 100 06/28/2023 17:08 WG2085849
Carbon tetrachloride U 12.8 100 100 06/28/2023 17:08 WG2085849
Chlorobenzene U 11.6 100 100 06/28/2023 17:08 WG2085849
Chlorodibromomethane U 14.0 100 100 06/28/2023 17:08 WG2085849
Chloroethane U 19.2 500 100 06/28/2023 17:08 WG2085849
Chloroform U 11.1 500 100 06/28/2023 17:08 WG2085849
Chloromethane U 96.0 250 100 06/28/2023 17:08 WG2085849
2-Chlorotoluene U 10.6 100 100 06/28/2023 17:08 WG2085849
4-Chlorotoluene U 11.4 100 100 06/28/2023 17:08 WG2085849
1,2-Dibromo-3-Chloropropane U 27.6 500 100 06/28/2023 17:08 WG2085849
1,2-Dibromoethane 13.4 J 12.6 100 100 06/28/2023 17:08 WG2085849
Dibromomethane U 12.2 100 100 06/28/2023 17:08 WG2085849
1,2-Dichlorobenzene U 10.7 100 100 06/28/2023 17:08 WG2085849
1,3-Dichlorobenzene U 11.0 100 100 06/28/2023 17:08 WG2085849
1,4-Dichlorobenzene U 12.0 100 100 06/28/2023 17:08 WG2085849
Dichlorodifluoromethane U 37.4 500 100 06/28/2023 17:08 WG2085849
1,1-Dichloroethane U 10.0 100 100 06/28/2023 17:08 WG2085849
1,2-Dichloroethane U 8.19 100 100 06/28/2023 17:08 WG2085849
1,1-Dichloroethene U 18.8 100 100 06/28/2023 17:08 WG2085849
cis-1,2-Dichloroethene U 12.6 100 100 06/28/2023 17:08 WG2085849
trans-1,2-Dichloroethene U 14.9 100 100 06/28/2023 17:08 WG2085849
1,2-Dichloropropane U 14.9 100 100 06/28/2023 17:08 WG2085849
1,1-Dichloropropene U 14.2 100 100 06/28/2023 17:08 WG2085849
1,3-Dichloropropane U 11.0 100 100 06/28/2023 17:08 WG2085849
2,2-Dichloropropane U 16.1 100 100 06/28/2023 17:08 WG2085849
Di-isopropyl ether U 10.5 100 100 06/28/2023 17:08 WG2085849
Ethylbenzene 1890 13.7 100 100 06/28/2023 17:08 WG2085849
Hexachloro-1,3-butadiene U 33.7 100 100 06/28/2023 17:08 WG2085849
Isopropylbenzene 82.9 J 10.5 100 100 06/28/2023 17:08 WG2085849
p-Isopropyltoluene U 12.0 100 100 06/28/2023 17:08 WG2085849
2-Butanone (MEK)U 119 1000 100 06/28/2023 17:08 WG2085849
Methylene Chloride U 43.0 500 100 06/28/2023 17:08 WG2085849
4-Methyl-2-pentanone (MIBK)U 47.8 1000 100 06/28/2023 17:08 WG2085849
Methyl tert-butyl ether U 10.1 100 100 06/28/2023 17:08 WG2085849
Naphthalene 578 100 500 100 06/28/2023 17:08 WG2085849
n-Propylbenzene 218 9.93 100 100 06/28/2023 17:08 WG2085849
Styrene 51.4 J 11.8 100 100 06/28/2023 17:08 WG2085849
1,1,1,2-Tetrachloroethane U 14.7 100 100 06/28/2023 17:08 WG2085849
1,1,2,2-Tetrachloroethane U 13.3 100 100 06/28/2023 17:08 WG2085849
Tetrachloroethene U 30.0 100 100 06/28/2023 17:08 WG2085849
Toluene 6280 27.8 100 100 06/28/2023 17:08 WG2085849
1,2,3-Trichlorobenzene U J3 23.0 100 100 06/28/2023 17:08 WG2085849
1,2,4-Trichlorobenzene U 48.1 100 100 06/28/2023 17:08 WG2085849
1,1,1-Trichloroethane U 14.9 100 100 06/28/2023 17:08 WG2085849
1,1,2-Trichloroethane U 15.8 100 100 06/28/2023 17:08 WG2085849
Trichloroethene U 19.0 100 100 06/28/2023 17:08 WG2085849
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:33 16 of 50
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:53 16 of 50
SAMPLE RESULTS - 06
L1628650
MW-4R
Collected date/time: 06/21/23 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 16.0 500 100 06/28/2023 17:08 WG2085849
1,2,3-Trichloropropane U 23.7 250 100 06/28/2023 17:08 WG2085849
1,2,4-Trimethylbenzene 2040 32.2 100 100 06/28/2023 17:08 WG2085849
1,3,5-Trimethylbenzene 577 10.4 100 100 06/28/2023 17:08 WG2085849
Vinyl chloride U 23.4 100 100 06/28/2023 17:08 WG2085849
o-Xylene 3250 17.4 100 100 06/28/2023 17:08 WG2085849
m&p-Xylenes 7410 43.0 200 100 06/28/2023 17:08 WG2085849
(S) Toluene-d8 106 80.0-120 06/28/2023 17:08 WG2085849
(S) 4-Bromofluorobenzene 103 77.0-126 06/28/2023 17:08 WG2085849
(S) 1,2-Dichloroethane-d4 98.9 70.0-130 06/28/2023 17:08 WG2085849
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:33 17 of 50
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:53 17 of 50
SAMPLE RESULTS - 07
L1628650
MW-6
Collected date/time: 06/21/23 15:00
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 2260 10000 200 06/28/2023 17:30 WG2085849
Acrolein U 508 10000 200 06/28/2023 17:30 WG2085849
Acrylonitrile U 134 2000 200 06/28/2023 17:30 WG2085849
Benzene 394 18.8 200 200 06/28/2023 17:30 WG2085849
Bromobenzene U 23.6 200 200 06/28/2023 17:30 WG2085849
Bromodichloromethane U 27.2 200 200 06/28/2023 17:30 WG2085849
Bromoform U 25.8 200 200 06/28/2023 17:30 WG2085849
Bromomethane U 121 1000 200 06/28/2023 17:30 WG2085849
n-Butylbenzene U 31.4 200 200 06/28/2023 17:30 WG2085849
sec-Butylbenzene U 25.0 200 200 06/28/2023 17:30 WG2085849
tert-Butylbenzene U 25.4 200 200 06/28/2023 17:30 WG2085849
Carbon tetrachloride U 25.6 200 200 06/28/2023 17:30 WG2085849
Chlorobenzene U 23.2 200 200 06/28/2023 17:30 WG2085849
Chlorodibromomethane U 28.0 200 200 06/28/2023 17:30 WG2085849
Chloroethane U 38.4 1000 200 06/28/2023 17:30 WG2085849
Chloroform U 22.2 1000 200 06/28/2023 17:30 WG2085849
Chloromethane U 192 500 200 06/28/2023 17:30 WG2085849
2-Chlorotoluene U 21.2 200 200 06/28/2023 17:30 WG2085849
4-Chlorotoluene U 22.8 200 200 06/28/2023 17:30 WG2085849
1,2-Dibromo-3-Chloropropane U 55.2 1000 200 06/28/2023 17:30 WG2085849
1,2-Dibromoethane 74.3 J 25.2 200 200 06/28/2023 17:30 WG2085849
Dibromomethane U 24.4 200 200 06/28/2023 17:30 WG2085849
1,2-Dichlorobenzene U 21.4 200 200 06/28/2023 17:30 WG2085849
1,3-Dichlorobenzene U 22.0 200 200 06/28/2023 17:30 WG2085849
1,4-Dichlorobenzene U 24.0 200 200 06/28/2023 17:30 WG2085849
Dichlorodifluoromethane U 74.8 1000 200 06/28/2023 17:30 WG2085849
1,1-Dichloroethane U 20.0 200 200 06/28/2023 17:30 WG2085849
1,2-Dichloroethane U 16.4 200 200 06/28/2023 17:30 WG2085849
1,1-Dichloroethene U 37.6 200 200 06/28/2023 17:30 WG2085849
cis-1,2-Dichloroethene U 25.2 200 200 06/28/2023 17:30 WG2085849
trans-1,2-Dichloroethene U 29.8 200 200 06/28/2023 17:30 WG2085849
1,2-Dichloropropane U 29.8 200 200 06/28/2023 17:30 WG2085849
1,1-Dichloropropene U 28.4 200 200 06/28/2023 17:30 WG2085849
1,3-Dichloropropane U 22.0 200 200 06/28/2023 17:30 WG2085849
2,2-Dichloropropane U 32.2 200 200 06/28/2023 17:30 WG2085849
Di-isopropyl ether 43.2 J 21.0 200 200 06/28/2023 17:30 WG2085849
Ethylbenzene 278 27.4 200 200 06/28/2023 17:30 WG2085849
Hexachloro-1,3-butadiene U 67.4 200 200 06/28/2023 17:30 WG2085849
Isopropylbenzene 28.9 J 21.0 200 200 06/28/2023 17:30 WG2085849
p-Isopropyltoluene U 24.0 200 200 06/28/2023 17:30 WG2085849
2-Butanone (MEK)522 J 238 2000 200 06/28/2023 17:30 WG2085849
Methylene Chloride U 86.0 1000 200 06/28/2023 17:30 WG2085849
4-Methyl-2-pentanone (MIBK)181 J 95.6 2000 200 06/28/2023 17:30 WG2085849
Methyl tert-butyl ether 10900 20.2 200 200 06/28/2023 17:30 WG2085849
Naphthalene 327 J 200 1000 200 06/28/2023 17:30 WG2085849
n-Propylbenzene 96.2 J 19.9 200 200 06/28/2023 17:30 WG2085849
Styrene U 23.6 200 200 06/28/2023 17:30 WG2085849
1,1,1,2-Tetrachloroethane U 29.4 200 200 06/28/2023 17:30 WG2085849
1,1,2,2-Tetrachloroethane U 26.6 200 200 06/28/2023 17:30 WG2085849
Tetrachloroethene U 60.0 200 200 06/28/2023 17:30 WG2085849
Toluene 792 55.6 200 200 06/28/2023 17:30 WG2085849
1,2,3-Trichlorobenzene U J3 46.0 200 200 06/28/2023 17:30 WG2085849
1,2,4-Trichlorobenzene U 96.2 200 200 06/28/2023 17:30 WG2085849
1,1,1-Trichloroethane U 29.8 200 200 06/28/2023 17:30 WG2085849
1,1,2-Trichloroethane U 31.6 200 200 06/28/2023 17:30 WG2085849
Trichloroethene U 38.0 200 200 06/28/2023 17:30 WG2085849
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:33 18 of 50
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:53 18 of 50
SAMPLE RESULTS - 07
L1628650
MW-6
Collected date/time: 06/21/23 15:00
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 32.0 1000 200 06/28/2023 17:30 WG2085849
1,2,3-Trichloropropane U 47.4 500 200 06/28/2023 17:30 WG2085849
1,2,4-Trimethylbenzene 971 64.4 200 200 06/28/2023 17:30 WG2085849
1,3,5-Trimethylbenzene 435 20.8 200 200 06/28/2023 17:30 WG2085849
Vinyl chloride U 46.8 200 200 06/28/2023 17:30 WG2085849
o-Xylene 676 34.8 200 200 06/28/2023 17:30 WG2085849
m&p-Xylenes 914 86.0 400 200 06/28/2023 17:30 WG2085849
(S) Toluene-d8 105 80.0-120 06/28/2023 17:30 WG2085849
(S) 4-Bromofluorobenzene 102 77.0-126 06/28/2023 17:30 WG2085849
(S) 1,2-Dichloroethane-d4 97.8 70.0-130 06/28/2023 17:30 WG2085849
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:33 19 of 50
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:53 19 of 50
SAMPLE RESULTS - 08
L1628650
MW-7
Collected date/time: 06/21/23 14:20
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone U 5650 25000 500 06/28/2023 17:51 WG2085849
Acrolein U 1270 25000 500 06/28/2023 17:51 WG2085849
Acrylonitrile U 336 5000 500 06/28/2023 17:51 WG2085849
Benzene 1520 47.1 500 500 06/28/2023 17:51 WG2085849
Bromobenzene U 59.0 500 500 06/28/2023 17:51 WG2085849
Bromodichloromethane U 68.0 500 500 06/28/2023 17:51 WG2085849
Bromoform U 64.5 500 500 06/28/2023 17:51 WG2085849
Bromomethane U 303 2500 500 06/28/2023 17:51 WG2085849
n-Butylbenzene U 78.5 500 500 06/28/2023 17:51 WG2085849
sec-Butylbenzene U 62.5 500 500 06/28/2023 17:51 WG2085849
tert-Butylbenzene U 63.5 500 500 06/28/2023 17:51 WG2085849
Carbon tetrachloride U 64.0 500 500 06/28/2023 17:51 WG2085849
Chlorobenzene U 58.0 500 500 06/28/2023 17:51 WG2085849
Chlorodibromomethane U 70.0 500 500 06/28/2023 17:51 WG2085849
Chloroethane U 96.0 2500 500 06/28/2023 17:51 WG2085849
Chloroform U 55.5 2500 500 06/28/2023 17:51 WG2085849
Chloromethane U 480 1250 500 06/28/2023 17:51 WG2085849
2-Chlorotoluene U 53.0 500 500 06/28/2023 17:51 WG2085849
4-Chlorotoluene U 57.0 500 500 06/28/2023 17:51 WG2085849
1,2-Dibromo-3-Chloropropane U 138 2500 500 06/28/2023 17:51 WG2085849
1,2-Dibromoethane U 63.0 500 500 06/28/2023 17:51 WG2085849
Dibromomethane U 61.0 500 500 06/28/2023 17:51 WG2085849
1,2-Dichlorobenzene U 53.5 500 500 06/28/2023 17:51 WG2085849
1,3-Dichlorobenzene U 55.0 500 500 06/28/2023 17:51 WG2085849
1,4-Dichlorobenzene U 60.0 500 500 06/28/2023 17:51 WG2085849
Dichlorodifluoromethane U 187 2500 500 06/28/2023 17:51 WG2085849
1,1-Dichloroethane U 50.0 500 500 06/28/2023 17:51 WG2085849
1,2-Dichloroethane U 40.9 500 500 06/28/2023 17:51 WG2085849
1,1-Dichloroethene U 94.0 500 500 06/28/2023 17:51 WG2085849
cis-1,2-Dichloroethene U 63.0 500 500 06/28/2023 17:51 WG2085849
trans-1,2-Dichloroethene U 74.5 500 500 06/28/2023 17:51 WG2085849
1,2-Dichloropropane U 74.5 500 500 06/28/2023 17:51 WG2085849
1,1-Dichloropropene U 71.0 500 500 06/28/2023 17:51 WG2085849
1,3-Dichloropropane U 55.0 500 500 06/28/2023 17:51 WG2085849
2,2-Dichloropropane U 80.5 500 500 06/28/2023 17:51 WG2085849
Di-isopropyl ether 124 J 52.5 500 500 06/28/2023 17:51 WG2085849
Ethylbenzene 544 68.5 500 500 06/28/2023 17:51 WG2085849
Hexachloro-1,3-butadiene U 169 500 500 06/28/2023 17:51 WG2085849
Isopropylbenzene 59.9 J 52.5 500 500 06/28/2023 17:51 WG2085849
p-Isopropyltoluene U 60.0 500 500 06/28/2023 17:51 WG2085849
2-Butanone (MEK)U 595 5000 500 06/28/2023 17:51 WG2085849
Methylene Chloride 245 J 215 2500 500 06/28/2023 17:51 WG2085849
4-Methyl-2-pentanone (MIBK)U 239 5000 500 06/28/2023 17:51 WG2085849
Methyl tert-butyl ether 31800 50.5 500 500 06/28/2023 17:51 WG2085849
Naphthalene U 500 2500 500 06/28/2023 17:51 WG2085849
n-Propylbenzene 104 J 49.7 500 500 06/28/2023 17:51 WG2085849
Styrene U 59.0 500 500 06/28/2023 17:51 WG2085849
1,1,1,2-Tetrachloroethane U 73.5 500 500 06/28/2023 17:51 WG2085849
1,1,2,2-Tetrachloroethane U 66.5 500 500 06/28/2023 17:51 WG2085849
Tetrachloroethene U 150 500 500 06/28/2023 17:51 WG2085849
Toluene 3860 139 500 500 06/28/2023 17:51 WG2085849
1,2,3-Trichlorobenzene U J3 115 500 500 06/28/2023 17:51 WG2085849
1,2,4-Trichlorobenzene U 241 500 500 06/28/2023 17:51 WG2085849
1,1,1-Trichloroethane U 74.5 500 500 06/28/2023 17:51 WG2085849
1,1,2-Trichloroethane U 79.0 500 500 06/28/2023 17:51 WG2085849
Trichloroethene U 95.0 500 500 06/28/2023 17:51 WG2085849
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:33 20 of 50
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:53 20 of 50
SAMPLE RESULTS - 08
L1628650
MW-7
Collected date/time: 06/21/23 14:20
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 80.0 2500 500 06/28/2023 17:51 WG2085849
1,2,3-Trichloropropane U 119 1250 500 06/28/2023 17:51 WG2085849
1,2,4-Trimethylbenzene 1080 161 500 500 06/28/2023 17:51 WG2085849
1,3,5-Trimethylbenzene 269 J 52.0 500 500 06/28/2023 17:51 WG2085849
Vinyl chloride U 117 500 500 06/28/2023 17:51 WG2085849
o-Xylene 1380 87.0 500 500 06/28/2023 17:51 WG2085849
m&p-Xylenes 3070 215 1000 500 06/28/2023 17:51 WG2085849
(S) Toluene-d8 103 80.0-120 06/28/2023 17:51 WG2085849
(S) 4-Bromofluorobenzene 103 77.0-126 06/28/2023 17:51 WG2085849
(S) 1,2-Dichloroethane-d4 98.6 70.0-130 06/28/2023 17:51 WG2085849
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:33 21 of 50
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:53 21 of 50
SAMPLE RESULTS - 09
L1628650
MW-8
Collected date/time: 06/21/23 15:40
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone U 11.3 50.0 1 06/28/2023 16:04 WG2085849
Acrolein U 2.54 50.0 1 06/28/2023 16:04 WG2085849
Acrylonitrile U 0.671 10.0 1 06/28/2023 16:04 WG2085849
Benzene 0.405 J 0.0941 1.00 1 06/28/2023 16:04 WG2085849
Bromobenzene U 0.118 1.00 1 06/28/2023 16:04 WG2085849
Bromodichloromethane U 0.136 1.00 1 06/28/2023 16:04 WG2085849
Bromoform U 0.129 1.00 1 06/28/2023 16:04 WG2085849
Bromomethane U 0.605 5.00 1 06/28/2023 16:04 WG2085849
n-Butylbenzene U 0.157 1.00 1 06/28/2023 16:04 WG2085849
sec-Butylbenzene 0.157 J 0.125 1.00 1 06/28/2023 16:04 WG2085849
tert-Butylbenzene U 0.127 1.00 1 06/28/2023 16:04 WG2085849
Carbon tetrachloride U 0.128 1.00 1 06/28/2023 16:04 WG2085849
Chlorobenzene U 0.116 1.00 1 06/28/2023 16:04 WG2085849
Chlorodibromomethane U 0.140 1.00 1 06/28/2023 16:04 WG2085849
Chloroethane U 0.192 5.00 1 06/28/2023 16:04 WG2085849
Chloroform U 0.111 5.00 1 06/28/2023 16:04 WG2085849
Chloromethane U 0.960 2.50 1 06/28/2023 16:04 WG2085849
2-Chlorotoluene U 0.106 1.00 1 06/28/2023 16:04 WG2085849
4-Chlorotoluene U 0.114 1.00 1 06/28/2023 16:04 WG2085849
1,2-Dibromo-3-Chloropropane U 0.276 5.00 1 06/28/2023 16:04 WG2085849
1,2-Dibromoethane U 0.126 1.00 1 06/28/2023 16:04 WG2085849
Dibromomethane U 0.122 1.00 1 06/28/2023 16:04 WG2085849
1,2-Dichlorobenzene U 0.107 1.00 1 06/28/2023 16:04 WG2085849
1,3-Dichlorobenzene U 0.110 1.00 1 06/28/2023 16:04 WG2085849
1,4-Dichlorobenzene U 0.120 1.00 1 06/28/2023 16:04 WG2085849
Dichlorodifluoromethane U 0.374 5.00 1 06/28/2023 16:04 WG2085849
1,1-Dichloroethane U 0.100 1.00 1 06/28/2023 16:04 WG2085849
1,2-Dichloroethane 0.184 J 0.0819 1.00 1 06/28/2023 16:04 WG2085849
1,1-Dichloroethene U 0.188 1.00 1 06/28/2023 16:04 WG2085849
cis-1,2-Dichloroethene U 0.126 1.00 1 06/28/2023 16:04 WG2085849
trans-1,2-Dichloroethene U 0.149 1.00 1 06/28/2023 16:04 WG2085849
1,2-Dichloropropane U 0.149 1.00 1 06/28/2023 16:04 WG2085849
1,1-Dichloropropene U 0.142 1.00 1 06/28/2023 16:04 WG2085849
1,3-Dichloropropane U 0.110 1.00 1 06/28/2023 16:04 WG2085849
2,2-Dichloropropane U 0.161 1.00 1 06/28/2023 16:04 WG2085849
Di-isopropyl ether 29.2 0.105 1.00 1 06/28/2023 16:04 WG2085849
Ethylbenzene U 0.137 1.00 1 06/28/2023 16:04 WG2085849
Hexachloro-1,3-butadiene U 0.337 1.00 1 06/28/2023 16:04 WG2085849
Isopropylbenzene 0.748 J 0.105 1.00 1 06/28/2023 16:04 WG2085849
p-Isopropyltoluene U 0.120 1.00 1 06/28/2023 16:04 WG2085849
2-Butanone (MEK)U 1.19 10.0 1 06/28/2023 16:04 WG2085849
Methylene Chloride U 0.430 5.00 1 06/28/2023 16:04 WG2085849
4-Methyl-2-pentanone (MIBK)U 0.478 10.0 1 06/28/2023 16:04 WG2085849
Methyl tert-butyl ether 8090 20.2 200 200 07/01/2023 14:31 WG2087771
Naphthalene U 1.00 5.00 1 06/28/2023 16:04 WG2085849
n-Propylbenzene 0.365 J 0.0993 1.00 1 06/28/2023 16:04 WG2085849
Styrene U 0.118 1.00 1 06/28/2023 16:04 WG2085849
1,1,1,2-Tetrachloroethane U 0.147 1.00 1 06/28/2023 16:04 WG2085849
1,1,2,2-Tetrachloroethane U 0.133 1.00 1 06/28/2023 16:04 WG2085849
Tetrachloroethene U 0.300 1.00 1 06/28/2023 16:04 WG2085849
Toluene U 0.278 1.00 1 06/28/2023 16:04 WG2085849
1,2,3-Trichlorobenzene U J3 0.230 1.00 1 06/28/2023 16:04 WG2085849
1,2,4-Trichlorobenzene U 0.481 1.00 1 06/28/2023 16:04 WG2085849
1,1,1-Trichloroethane U 0.149 1.00 1 06/28/2023 16:04 WG2085849
1,1,2-Trichloroethane U 0.158 1.00 1 06/28/2023 16:04 WG2085849
Trichloroethene U 0.190 1.00 1 06/28/2023 16:04 WG2085849
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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Excel Civil & Environmental Associates L1628650 07/03/23 14:53 22 of 50
SAMPLE RESULTS - 09
L1628650
MW-8
Collected date/time: 06/21/23 15:40
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 0.160 5.00 1 06/28/2023 16:04 WG2085849
1,2,3-Trichloropropane U 0.237 2.50 1 06/28/2023 16:04 WG2085849
1,2,4-Trimethylbenzene 0.371 J 0.322 1.00 1 06/28/2023 16:04 WG2085849
1,3,5-Trimethylbenzene U 0.104 1.00 1 06/28/2023 16:04 WG2085849
Vinyl chloride U 0.234 1.00 1 06/28/2023 16:04 WG2085849
o-Xylene 0.372 J 0.174 1.00 1 06/28/2023 16:04 WG2085849
m&p-Xylenes 1.04 J 0.430 2.00 1 06/28/2023 16:04 WG2085849
(S) Toluene-d8 106 80.0-120 06/28/2023 16:04 WG2085849
(S) Toluene-d8 106 80.0-120 07/01/2023 14:31 WG2087771
(S) 4-Bromofluorobenzene 105 77.0-126 06/28/2023 16:04 WG2085849
(S) 4-Bromofluorobenzene 95.1 77.0-126 07/01/2023 14:31 WG2087771
(S) 1,2-Dichloroethane-d4 98.4 70.0-130 06/28/2023 16:04 WG2085849
(S) 1,2-Dichloroethane-d4 110 70.0-130 07/01/2023 14:31 WG2087771
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 L1628650 07/03/23 14:53 23 of 50
SAMPLE RESULTS - 10
L1628650
MW-9
Collected date/time: 06/21/23 14:30
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 06/28/2023 18:13 WG2085849
Acrolein U 508 10000 200 06/28/2023 18:13 WG2085849
Acrylonitrile U 134 2000 200 06/28/2023 18:13 WG2085849
Benzene 1690 18.8 200 200 06/28/2023 18:13 WG2085849
Bromobenzene U 23.6 200 200 06/28/2023 18:13 WG2085849
Bromodichloromethane U 27.2 200 200 06/28/2023 18:13 WG2085849
Bromoform U 25.8 200 200 06/28/2023 18:13 WG2085849
Bromomethane U 121 1000 200 06/28/2023 18:13 WG2085849
n-Butylbenzene U 31.4 200 200 06/28/2023 18:13 WG2085849
sec-Butylbenzene U 25.0 200 200 06/28/2023 18:13 WG2085849
tert-Butylbenzene U 25.4 200 200 06/28/2023 18:13 WG2085849
Carbon tetrachloride U 25.6 200 200 06/28/2023 18:13 WG2085849
Chlorobenzene U 23.2 200 200 06/28/2023 18:13 WG2085849
Chlorodibromomethane U 28.0 200 200 06/28/2023 18:13 WG2085849
Chloroethane U 38.4 1000 200 06/28/2023 18:13 WG2085849
Chloroform U 22.2 1000 200 06/28/2023 18:13 WG2085849
Chloromethane U 192 500 200 06/28/2023 18:13 WG2085849
2-Chlorotoluene U 21.2 200 200 06/28/2023 18:13 WG2085849
4-Chlorotoluene U 22.8 200 200 06/28/2023 18:13 WG2085849
1,2-Dibromo-3-Chloropropane U 55.2 1000 200 06/28/2023 18:13 WG2085849
1,2-Dibromoethane U 25.2 200 200 06/28/2023 18:13 WG2085849
Dibromomethane U 24.4 200 200 06/28/2023 18:13 WG2085849
1,2-Dichlorobenzene U 21.4 200 200 06/28/2023 18:13 WG2085849
1,3-Dichlorobenzene U 22.0 200 200 06/28/2023 18:13 WG2085849
1,4-Dichlorobenzene U 24.0 200 200 06/28/2023 18:13 WG2085849
Dichlorodifluoromethane U 74.8 1000 200 06/28/2023 18:13 WG2085849
1,1-Dichloroethane U 20.0 200 200 06/28/2023 18:13 WG2085849
1,2-Dichloroethane U 16.4 200 200 06/28/2023 18:13 WG2085849
1,1-Dichloroethene U 37.6 200 200 06/28/2023 18:13 WG2085849
cis-1,2-Dichloroethene U 25.2 200 200 06/28/2023 18:13 WG2085849
trans-1,2-Dichloroethene U 29.8 200 200 06/28/2023 18:13 WG2085849
1,2-Dichloropropane U 29.8 200 200 06/28/2023 18:13 WG2085849
1,1-Dichloropropene U 28.4 200 200 06/28/2023 18:13 WG2085849
1,3-Dichloropropane U 22.0 200 200 06/28/2023 18:13 WG2085849
2,2-Dichloropropane U 32.2 200 200 06/28/2023 18:13 WG2085849
Di-isopropyl ether U 21.0 200 200 06/28/2023 18:13 WG2085849
Ethylbenzene 60.8 J 27.4 200 200 06/28/2023 18:13 WG2085849
Hexachloro-1,3-butadiene U 67.4 200 200 06/28/2023 18:13 WG2085849
Isopropylbenzene U 21.0 200 200 06/28/2023 18:13 WG2085849
p-Isopropyltoluene U 24.0 200 200 06/28/2023 18:13 WG2085849
2-Butanone (MEK)U 238 2000 200 06/28/2023 18:13 WG2085849
Methylene Chloride U 86.0 1000 200 06/28/2023 18:13 WG2085849
4-Methyl-2-pentanone (MIBK)U 95.6 2000 200 06/28/2023 18:13 WG2085849
Methyl tert-butyl ether U 20.2 200 200 06/28/2023 18:13 WG2085849
Naphthalene U 200 1000 200 06/28/2023 18:13 WG2085849
n-Propylbenzene U 19.9 200 200 06/28/2023 18:13 WG2085849
Styrene U 23.6 200 200 06/28/2023 18:13 WG2085849
1,1,1,2-Tetrachloroethane U 29.4 200 200 06/28/2023 18:13 WG2085849
1,1,2,2-Tetrachloroethane U 26.6 200 200 06/28/2023 18:13 WG2085849
Tetrachloroethene U 60.0 200 200 06/28/2023 18:13 WG2085849
Toluene U 55.6 200 200 06/28/2023 18:13 WG2085849
1,2,3-Trichlorobenzene U J3 46.0 200 200 06/28/2023 18:13 WG2085849
1,2,4-Trichlorobenzene U 96.2 200 200 06/28/2023 18:13 WG2085849
1,1,1-Trichloroethane U 29.8 200 200 06/28/2023 18:13 WG2085849
1,1,2-Trichloroethane U 31.6 200 200 06/28/2023 18:13 WG2085849
Trichloroethene U 38.0 200 200 06/28/2023 18:13 WG2085849
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 L1628650 07/03/23 14:53 24 of 50
SAMPLE RESULTS - 10
L1628650
MW-9
Collected date/time: 06/21/23 14:30
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 06/28/2023 18:13 WG2085849
1,2,3-Trichloropropane U 47.4 500 200 06/28/2023 18:13 WG2085849
1,2,4-Trimethylbenzene 111 J 64.4 200 200 06/28/2023 18:13 WG2085849
1,3,5-Trimethylbenzene 34.7 J 20.8 200 200 06/28/2023 18:13 WG2085849
Vinyl chloride U 46.8 200 200 06/28/2023 18:13 WG2085849
o-Xylene 258 34.8 200 200 06/28/2023 18:13 WG2085849
m&p-Xylenes 506 86.0 400 200 06/28/2023 18:13 WG2085849
(S) Toluene-d8 105 80.0-120 06/28/2023 18:13 WG2085849
(S) 4-Bromofluorobenzene 103 77.0-126 06/28/2023 18:13 WG2085849
(S) 1,2-Dichloroethane-d4 96.5 70.0-130 06/28/2023 18:13 WG2085849
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 L1628650 07/03/23 14:53 25 of 50
SAMPLE RESULTS - 11
L1628650
MW-10
Collected date/time: 06/21/23 14:45
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 113 500 10 06/28/2023 18:34 WG2085849
Acrolein U 25.4 500 10 06/28/2023 18:34 WG2085849
Acrylonitrile U 6.71 100 10 06/28/2023 18:34 WG2085849
Benzene 87.8 0.941 10.0 10 06/28/2023 18:34 WG2085849
Bromobenzene U 1.18 10.0 10 06/28/2023 18:34 WG2085849
Bromodichloromethane U 1.36 10.0 10 06/28/2023 18:34 WG2085849
Bromoform U 1.29 10.0 10 06/28/2023 18:34 WG2085849
Bromomethane U 6.05 50.0 10 06/28/2023 18:34 WG2085849
n-Butylbenzene 4.48 J 1.57 10.0 10 06/28/2023 18:34 WG2085849
sec-Butylbenzene 5.99 J 1.25 10.0 10 06/28/2023 18:34 WG2085849
tert-Butylbenzene U 1.27 10.0 10 06/28/2023 18:34 WG2085849
Carbon tetrachloride U 1.28 10.0 10 06/28/2023 18:34 WG2085849
Chlorobenzene U 1.16 10.0 10 06/28/2023 18:34 WG2085849
Chlorodibromomethane U 1.40 10.0 10 06/28/2023 18:34 WG2085849
Chloroethane U 1.92 50.0 10 06/28/2023 18:34 WG2085849
Chloroform U 1.11 50.0 10 06/28/2023 18:34 WG2085849
Chloromethane U 9.60 25.0 10 06/28/2023 18:34 WG2085849
2-Chlorotoluene U 1.06 10.0 10 06/28/2023 18:34 WG2085849
4-Chlorotoluene U 1.14 10.0 10 06/28/2023 18:34 WG2085849
1,2-Dibromo-3-Chloropropane U 2.76 50.0 10 06/28/2023 18:34 WG2085849
1,2-Dibromoethane U 1.26 10.0 10 06/28/2023 18:34 WG2085849
Dibromomethane U 1.22 10.0 10 06/28/2023 18:34 WG2085849
1,2-Dichlorobenzene U 1.07 10.0 10 06/28/2023 18:34 WG2085849
1,3-Dichlorobenzene U 1.10 10.0 10 06/28/2023 18:34 WG2085849
1,4-Dichlorobenzene U 1.20 10.0 10 06/28/2023 18:34 WG2085849
Dichlorodifluoromethane U 3.74 50.0 10 06/28/2023 18:34 WG2085849
1,1-Dichloroethane U 1.00 10.0 10 06/28/2023 18:34 WG2085849
1,2-Dichloroethane 3.82 J 0.819 10.0 10 06/28/2023 18:34 WG2085849
1,1-Dichloroethene U 1.88 10.0 10 06/28/2023 18:34 WG2085849
cis-1,2-Dichloroethene U 1.26 10.0 10 06/28/2023 18:34 WG2085849
trans-1,2-Dichloroethene U 1.49 10.0 10 06/28/2023 18:34 WG2085849
1,2-Dichloropropane U 1.49 10.0 10 06/28/2023 18:34 WG2085849
1,1-Dichloropropene U 1.42 10.0 10 06/28/2023 18:34 WG2085849
1,3-Dichloropropane U 1.10 10.0 10 06/28/2023 18:34 WG2085849
2,2-Dichloropropane U 1.61 10.0 10 06/28/2023 18:34 WG2085849
Di-isopropyl ether 4.77 J 1.05 10.0 10 06/28/2023 18:34 WG2085849
Ethylbenzene 42.5 1.37 10.0 10 06/28/2023 18:34 WG2085849
Hexachloro-1,3-butadiene U 3.37 10.0 10 06/28/2023 18:34 WG2085849
Isopropylbenzene 32.4 1.05 10.0 10 06/28/2023 18:34 WG2085849
p-Isopropyltoluene 9.08 J 1.20 10.0 10 06/28/2023 18:34 WG2085849
2-Butanone (MEK)U 11.9 100 10 06/28/2023 18:34 WG2085849
Methylene Chloride U 4.30 50.0 10 06/28/2023 18:34 WG2085849
4-Methyl-2-pentanone (MIBK)U 4.78 100 10 06/28/2023 18:34 WG2085849
Methyl tert-butyl ether 101 1.01 10.0 10 06/28/2023 18:34 WG2085849
Naphthalene 48.3 J 10.0 50.0 10 06/28/2023 18:34 WG2085849
n-Propylbenzene 16.7 0.993 10.0 10 06/28/2023 18:34 WG2085849
Styrene U 1.18 10.0 10 06/28/2023 18:34 WG2085849
1,1,1,2-Tetrachloroethane U 1.47 10.0 10 06/28/2023 18:34 WG2085849
1,1,2,2-Tetrachloroethane U 1.33 10.0 10 06/28/2023 18:34 WG2085849
Tetrachloroethene U 3.00 10.0 10 06/28/2023 18:34 WG2085849
Toluene 8.84 J 2.78 10.0 10 06/28/2023 18:34 WG2085849
1,2,3-Trichlorobenzene U J3 2.30 10.0 10 06/28/2023 18:34 WG2085849
1,2,4-Trichlorobenzene U 4.81 10.0 10 06/28/2023 18:34 WG2085849
1,1,1-Trichloroethane U 1.49 10.0 10 06/28/2023 18:34 WG2085849
1,1,2-Trichloroethane U 1.58 10.0 10 06/28/2023 18:34 WG2085849
Trichloroethene U 1.90 10.0 10 06/28/2023 18:34 WG2085849
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 L1628650 07/03/23 14:53 26 of 50
SAMPLE RESULTS - 11
L1628650
MW-10
Collected date/time: 06/21/23 14:45
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 1.60 50.0 10 06/28/2023 18:34 WG2085849
1,2,3-Trichloropropane U 2.37 25.0 10 06/28/2023 18:34 WG2085849
1,2,4-Trimethylbenzene 240 3.22 10.0 10 06/28/2023 18:34 WG2085849
1,3,5-Trimethylbenzene 93.3 1.04 10.0 10 06/28/2023 18:34 WG2085849
Vinyl chloride U 2.34 10.0 10 06/28/2023 18:34 WG2085849
o-Xylene 238 1.74 10.0 10 06/28/2023 18:34 WG2085849
m&p-Xylenes 574 4.30 20.0 10 06/28/2023 18:34 WG2085849
(S) Toluene-d8 103 80.0-120 06/28/2023 18:34 WG2085849
(S) 4-Bromofluorobenzene 98.0 77.0-126 06/28/2023 18:34 WG2085849
(S) 1,2-Dichloroethane-d4 99.5 70.0-130 06/28/2023 18:34 WG2085849
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 L1628650 07/03/23 14:53 27 of 50
SAMPLE RESULTS - 12
L1628650
MW-13
Collected date/time: 06/21/23 15:15
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Acetone U 22.6 100 2 06/28/2023 16:25 WG2085849
Acrolein U 5.08 100 2 06/28/2023 16:25 WG2085849
Acrylonitrile U 1.34 20.0 2 06/28/2023 16:25 WG2085849
Benzene U 0.188 2.00 2 06/28/2023 16:25 WG2085849
Bromobenzene U 0.236 2.00 2 06/28/2023 16:25 WG2085849
Bromodichloromethane U 0.272 2.00 2 06/28/2023 16:25 WG2085849
Bromoform U 0.258 2.00 2 06/28/2023 16:25 WG2085849
Bromomethane U 1.21 10.0 2 06/28/2023 16:25 WG2085849
n-Butylbenzene U 0.314 2.00 2 06/28/2023 16:25 WG2085849
sec-Butylbenzene U 0.250 2.00 2 06/28/2023 16:25 WG2085849
tert-Butylbenzene U 0.254 2.00 2 06/28/2023 16:25 WG2085849
Carbon tetrachloride U 0.256 2.00 2 06/28/2023 16:25 WG2085849
Chlorobenzene U 0.232 2.00 2 06/28/2023 16:25 WG2085849
Chlorodibromomethane U 0.280 2.00 2 06/28/2023 16:25 WG2085849
Chloroethane U 0.384 10.0 2 06/28/2023 16:25 WG2085849
Chloroform U 0.222 10.0 2 06/28/2023 16:25 WG2085849
Chloromethane U 1.92 5.00 2 06/28/2023 16:25 WG2085849
2-Chlorotoluene U 0.212 2.00 2 06/28/2023 16:25 WG2085849
4-Chlorotoluene U 0.228 2.00 2 06/28/2023 16:25 WG2085849
1,2-Dibromo-3-Chloropropane U 0.552 10.0 2 06/28/2023 16:25 WG2085849
1,2-Dibromoethane U 0.252 2.00 2 06/28/2023 16:25 WG2085849
Dibromomethane U 0.244 2.00 2 06/28/2023 16:25 WG2085849
1,2-Dichlorobenzene U 0.214 2.00 2 06/28/2023 16:25 WG2085849
1,3-Dichlorobenzene U 0.220 2.00 2 06/28/2023 16:25 WG2085849
1,4-Dichlorobenzene U 0.240 2.00 2 06/28/2023 16:25 WG2085849
Dichlorodifluoromethane U 0.748 10.0 2 06/28/2023 16:25 WG2085849
1,1-Dichloroethane U 0.200 2.00 2 06/28/2023 16:25 WG2085849
1,2-Dichloroethane U 0.164 2.00 2 06/28/2023 16:25 WG2085849
1,1-Dichloroethene U 0.376 2.00 2 06/28/2023 16:25 WG2085849
cis-1,2-Dichloroethene U 0.252 2.00 2 06/28/2023 16:25 WG2085849
trans-1,2-Dichloroethene U 0.298 2.00 2 06/28/2023 16:25 WG2085849
1,2-Dichloropropane U 0.298 2.00 2 06/28/2023 16:25 WG2085849
1,1-Dichloropropene U 0.284 2.00 2 06/28/2023 16:25 WG2085849
1,3-Dichloropropane U 0.220 2.00 2 06/28/2023 16:25 WG2085849
2,2-Dichloropropane U 0.322 2.00 2 06/28/2023 16:25 WG2085849
Di-isopropyl ether U 0.210 2.00 2 06/28/2023 16:25 WG2085849
Ethylbenzene U 0.274 2.00 2 06/28/2023 16:25 WG2085849
Hexachloro-1,3-butadiene U 0.674 2.00 2 06/28/2023 16:25 WG2085849
Isopropylbenzene U 0.210 2.00 2 06/28/2023 16:25 WG2085849
p-Isopropyltoluene U 0.240 2.00 2 06/28/2023 16:25 WG2085849
2-Butanone (MEK)U 2.38 20.0 2 06/28/2023 16:25 WG2085849
Methylene Chloride U 0.860 10.0 2 06/28/2023 16:25 WG2085849
4-Methyl-2-pentanone (MIBK)U 0.956 20.0 2 06/28/2023 16:25 WG2085849
Methyl tert-butyl ether U 0.202 2.00 2 07/01/2023 14:09 WG2087771
Naphthalene U 2.00 10.0 2 06/28/2023 16:25 WG2085849
n-Propylbenzene U 0.199 2.00 2 06/28/2023 16:25 WG2085849
Styrene U 0.236 2.00 2 06/28/2023 16:25 WG2085849
1,1,1,2-Tetrachloroethane U 0.294 2.00 2 06/28/2023 16:25 WG2085849
1,1,2,2-Tetrachloroethane U 0.266 2.00 2 06/28/2023 16:25 WG2085849
Tetrachloroethene U 0.600 2.00 2 06/28/2023 16:25 WG2085849
Toluene U 0.556 2.00 2 06/28/2023 16:25 WG2085849
1,2,3-Trichlorobenzene U J3 0.460 2.00 2 06/28/2023 16:25 WG2085849
1,2,4-Trichlorobenzene U 0.962 2.00 2 06/28/2023 16:25 WG2085849
1,1,1-Trichloroethane U 0.298 2.00 2 06/28/2023 16:25 WG2085849
1,1,2-Trichloroethane U 0.316 2.00 2 06/28/2023 16:25 WG2085849
Trichloroethene U 0.380 2.00 2 06/28/2023 16:25 WG2085849
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 L1628650 07/03/23 14:53 28 of 50
SAMPLE RESULTS - 12
L1628650
MW-13
Collected date/time: 06/21/23 15:15
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Trichlorofluoromethane U 0.320 10.0 2 06/28/2023 16:25 WG2085849
1,2,3-Trichloropropane U 0.474 5.00 2 06/28/2023 16:25 WG2085849
1,2,4-Trimethylbenzene U 0.644 2.00 2 06/28/2023 16:25 WG2085849
1,3,5-Trimethylbenzene U 0.208 2.00 2 06/28/2023 16:25 WG2085849
Vinyl chloride U 0.468 2.00 2 06/28/2023 16:25 WG2085849
o-Xylene U 0.348 2.00 2 06/28/2023 16:25 WG2085849
m&p-Xylenes U 0.860 4.00 2 06/28/2023 16:25 WG2085849
(S) Toluene-d8 108 80.0-120 06/28/2023 16:25 WG2085849
(S) Toluene-d8 107 80.0-120 07/01/2023 14:09 WG2087771
(S) 4-Bromofluorobenzene 103 77.0-126 06/28/2023 16:25 WG2085849
(S) 4-Bromofluorobenzene 95.4 77.0-126 07/01/2023 14:09 WG2087771
(S) 1,2-Dichloroethane-d4 95.4 70.0-130 06/28/2023 16:25 WG2085849
(S) 1,2-Dichloroethane-d4 106 70.0-130 07/01/2023 14:09 WG2087771
Sample Narrative:
L1628650-12 WG2085849: Dilution due to sediment.
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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SAMPLE RESULTS - 13
L1628650
TRIP BLANK
Collected date/time: 06/21/23 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 06/28/2023 12:28 WG2085849
Acrolein U 2.54 50.0 1 06/28/2023 12:28 WG2085849
Acrylonitrile U 0.671 10.0 1 06/28/2023 12:28 WG2085849
Benzene U 0.0941 1.00 1 06/28/2023 12:28 WG2085849
Bromobenzene U 0.118 1.00 1 06/28/2023 12:28 WG2085849
Bromodichloromethane U 0.136 1.00 1 06/28/2023 12:28 WG2085849
Bromoform U 0.129 1.00 1 06/28/2023 12:28 WG2085849
Bromomethane U 0.605 5.00 1 06/28/2023 12:28 WG2085849
n-Butylbenzene U 0.157 1.00 1 06/28/2023 12:28 WG2085849
sec-Butylbenzene U 0.125 1.00 1 06/28/2023 12:28 WG2085849
tert-Butylbenzene U 0.127 1.00 1 06/28/2023 12:28 WG2085849
Carbon tetrachloride U 0.128 1.00 1 06/28/2023 12:28 WG2085849
Chlorobenzene U 0.116 1.00 1 06/28/2023 12:28 WG2085849
Chlorodibromomethane U 0.140 1.00 1 06/28/2023 12:28 WG2085849
Chloroethane U 0.192 5.00 1 06/28/2023 12:28 WG2085849
Chloroform U 0.111 5.00 1 06/28/2023 12:28 WG2085849
Chloromethane U 0.960 2.50 1 06/28/2023 12:28 WG2085849
2-Chlorotoluene U 0.106 1.00 1 06/28/2023 12:28 WG2085849
4-Chlorotoluene U 0.114 1.00 1 06/28/2023 12:28 WG2085849
1,2-Dibromo-3-Chloropropane U 0.276 5.00 1 06/28/2023 12:28 WG2085849
1,2-Dibromoethane U 0.126 1.00 1 06/28/2023 12:28 WG2085849
Dibromomethane U 0.122 1.00 1 06/28/2023 12:28 WG2085849
1,2-Dichlorobenzene U 0.107 1.00 1 06/28/2023 12:28 WG2085849
1,3-Dichlorobenzene U 0.110 1.00 1 06/28/2023 12:28 WG2085849
1,4-Dichlorobenzene U 0.120 1.00 1 06/28/2023 12:28 WG2085849
Dichlorodifluoromethane U 0.374 5.00 1 06/28/2023 12:28 WG2085849
1,1-Dichloroethane U 0.100 1.00 1 06/28/2023 12:28 WG2085849
1,2-Dichloroethane U 0.0819 1.00 1 06/28/2023 12:28 WG2085849
1,1-Dichloroethene U 0.188 1.00 1 06/28/2023 12:28 WG2085849
cis-1,2-Dichloroethene U 0.126 1.00 1 06/28/2023 12:28 WG2085849
trans-1,2-Dichloroethene U 0.149 1.00 1 06/28/2023 12:28 WG2085849
1,2-Dichloropropane U 0.149 1.00 1 06/28/2023 12:28 WG2085849
1,1-Dichloropropene U 0.142 1.00 1 06/28/2023 12:28 WG2085849
1,3-Dichloropropane U 0.110 1.00 1 06/28/2023 12:28 WG2085849
2,2-Dichloropropane U 0.161 1.00 1 06/28/2023 12:28 WG2085849
Di-isopropyl ether U 0.105 1.00 1 06/28/2023 12:28 WG2085849
Ethylbenzene U 0.137 1.00 1 06/28/2023 12:28 WG2085849
Hexachloro-1,3-butadiene U 0.337 1.00 1 06/28/2023 12:28 WG2085849
Isopropylbenzene U 0.105 1.00 1 06/28/2023 12:28 WG2085849
p-Isopropyltoluene U 0.120 1.00 1 06/28/2023 12:28 WG2085849
2-Butanone (MEK)U 1.19 10.0 1 06/28/2023 12:28 WG2085849
Methylene Chloride U 0.430 5.00 1 06/28/2023 12:28 WG2085849
4-Methyl-2-pentanone (MIBK)U 0.478 10.0 1 06/28/2023 12:28 WG2085849
Methyl tert-butyl ether U 0.101 1.00 1 06/28/2023 12:28 WG2085849
Naphthalene U 1.00 5.00 1 06/28/2023 12:28 WG2085849
n-Propylbenzene U 0.0993 1.00 1 06/28/2023 12:28 WG2085849
Styrene U 0.118 1.00 1 06/28/2023 12:28 WG2085849
1,1,1,2-Tetrachloroethane U 0.147 1.00 1 06/28/2023 12:28 WG2085849
1,1,2,2-Tetrachloroethane U 0.133 1.00 1 06/28/2023 12:28 WG2085849
Tetrachloroethene U 0.300 1.00 1 06/28/2023 12:28 WG2085849
Toluene U 0.278 1.00 1 06/28/2023 12:28 WG2085849
1,2,3-Trichlorobenzene U J3 0.230 1.00 1 06/28/2023 12:28 WG2085849
1,2,4-Trichlorobenzene U 0.481 1.00 1 06/28/2023 12:28 WG2085849
1,1,1-Trichloroethane U 0.149 1.00 1 06/28/2023 12:28 WG2085849
1,1,2-Trichloroethane U 0.158 1.00 1 06/28/2023 12:28 WG2085849
Trichloroethene U 0.190 1.00 1 06/28/2023 12:28 WG2085849
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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SAMPLE RESULTS - 13
L1628650
TRIP BLANK
Collected date/time: 06/21/23 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 06/28/2023 12:28 WG2085849
1,2,3-Trichloropropane U 0.237 2.50 1 06/28/2023 12:28 WG2085849
1,2,4-Trimethylbenzene U 0.322 1.00 1 06/28/2023 12:28 WG2085849
1,3,5-Trimethylbenzene U 0.104 1.00 1 06/28/2023 12:28 WG2085849
Vinyl chloride U 0.234 1.00 1 06/28/2023 12:28 WG2085849
o-Xylene U 0.174 1.00 1 06/28/2023 12:28 WG2085849
m&p-Xylenes U 0.430 2.00 1 06/28/2023 12:28 WG2085849
(S) Toluene-d8 106 80.0-120 06/28/2023 12:28 WG2085849
(S) 4-Bromofluorobenzene 105 77.0-126 06/28/2023 12:28 WG2085849
(S) 1,2-Dichloroethane-d4 96.4 70.0-130 06/28/2023 12:28 WG2085849
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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QUALITY CONTROL SUMMARYWG2085227
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1628650-01,02,03,05
Method Blank (MB)
(MB) R3942114-3 06/27/23 13:58
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
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
2-Butanone (MEK)U 1.19 10.0
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG2085227
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1628650-01,02,03,05
Method Blank (MB)
(MB) R3942114-3 06/27/23 13:58
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
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 116 80.0-120
(S) 4-Bromofluorobenzene 113 77.0-126
(S) 1,2-Dichloroethane-d4 108 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R3942114-1 06/27/23 12:54 • (LCSD) R3942114-2 06/27/23 13:15
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 24.8 23.0 99.2 92.0 19.0-160 7.53 27
Acrolein 25.0 24.1 24.9 96.4 99.6 10.0-160 3.27 26
Acrylonitrile 25.0 25.0 24.2 100 96.8 55.0-149 3.25 20
Benzene 5.00 5.12 5.00 102 100 70.0-123 2.37 20
Bromobenzene 5.00 4.62 4.54 92.4 90.8 73.0-121 1.75 20
Bromodichloromethane 5.00 5.12 4.99 102 99.8 75.0-120 2.57 20
Bromoform 5.00 4.91 5.06 98.2 101 68.0-132 3.01 20
Bromomethane 5.00 6.02 6.07 120 121 10.0-160 0.827 25
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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QUALITY CONTROL SUMMARYWG2085227
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1628650-01,02,03,05
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R3942114-1 06/27/23 12:54 • (LCSD) R3942114-2 06/27/23 13:15
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 %%%%%
n-Butylbenzene 5.00 5.12 5.11 102 102 73.0-125 0.196 20
sec-Butylbenzene 5.00 5.09 4.88 102 97.6 75.0-125 4.21 20
tert-Butylbenzene 5.00 4.94 5.00 98.8 100 76.0-124 1.21 20
Carbon tetrachloride 5.00 5.29 5.19 106 104 68.0-126 1.91 20
Chlorobenzene 5.00 5.04 5.03 101 101 80.0-121 0.199 20
Chlorodibromomethane 5.00 5.13 4.79 103 95.8 77.0-125 6.85 20
Chloroethane 5.00 5.31 5.37 106 107 47.0-150 1.12 20
Chloroform 5.00 5.16 4.97 103 99.4 73.0-120 3.75 20
Chloromethane 5.00 5.08 4.88 102 97.6 41.0-142 4.02 20
2-Chlorotoluene 5.00 4.81 4.79 96.2 95.8 76.0-123 0.417 20
4-Chlorotoluene 5.00 4.75 4.73 95.0 94.6 75.0-122 0.422 20
1,2-Dibromo-3-Chloropropane 5.00 5.14 4.76 103 95.2 58.0-134 7.68 20
1,2-Dibromoethane 5.00 5.03 4.91 101 98.2 80.0-122 2.41 20
Dibromomethane 5.00 4.73 4.87 94.6 97.4 80.0-120 2.92 20
1,2-Dichlorobenzene 5.00 5.02 4.95 100 99.0 79.0-121 1.40 20
1,3-Dichlorobenzene 5.00 4.91 4.79 98.2 95.8 79.0-120 2.47 20
1,4-Dichlorobenzene 5.00 4.79 4.58 95.8 91.6 79.0-120 4.48 20
Dichlorodifluoromethane 5.00 5.28 5.72 106 114 51.0-149 8.00 20
1,1-Dichloroethane 5.00 4.92 4.99 98.4 99.8 70.0-126 1.41 20
1,2-Dichloroethane 5.00 5.07 4.97 101 99.4 70.0-128 1.99 20
1,1-Dichloroethene 5.00 4.97 5.04 99.4 101 71.0-124 1.40 20
trans-1,2-Dichloroethene 5.00 5.04 4.99 101 99.8 73.0-120 0.997 20
1,2-Dichloropropane 5.00 4.89 4.69 97.8 93.8 77.0-125 4.18 20
1,1-Dichloropropene 5.00 4.97 5.12 99.4 102 74.0-126 2.97 20
1,3-Dichloropropane 5.00 5.21 4.98 104 99.6 80.0-120 4.51 20
2,2-Dichloropropane 5.00 5.24 5.08 105 102 58.0-130 3.10 20
Di-isopropyl ether 5.00 4.88 4.74 97.6 94.8 58.0-138 2.91 20
Ethylbenzene 5.00 5.02 4.89 100 97.8 79.0-123 2.62 20
Hexachloro-1,3-butadiene 5.00 5.47 5.56 109 111 54.0-138 1.63 20
Isopropylbenzene 5.00 5.06 4.91 101 98.2 76.0-127 3.01 20
p-Isopropyltoluene 5.00 5.05 5.00 101 100 76.0-125 0.995 20
2-Butanone (MEK)25.0 26.0 27.1 104 108 44.0-160 4.14 20
Methylene Chloride 5.00 4.95 4.86 99.0 97.2 67.0-120 1.83 20
4-Methyl-2-pentanone (MIBK)25.0 25.7 25.4 103 102 68.0-142 1.17 20
Methyl tert-butyl ether 5.00 5.22 5.02 104 100 68.0-125 3.91 20
Naphthalene 5.00 5.20 5.15 104 103 54.0-135 0.966 20
n-Propylbenzene 5.00 4.78 4.77 95.6 95.4 77.0-124 0.209 20
Styrene 5.00 5.10 4.93 102 98.6 73.0-130 3.39 20
1,1,1,2-Tetrachloroethane 5.00 5.12 4.89 102 97.8 75.0-125 4.60 20
1,1,2,2-Tetrachloroethane 5.00 4.94 4.85 98.8 97.0 65.0-130 1.84 20
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:53 34 of 50
QUALITY CONTROL SUMMARYWG2085227
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1628650-01,02,03,05
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R3942114-1 06/27/23 12:54 • (LCSD) R3942114-2 06/27/23 13:15
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 %%%%%
Tetrachloroethene 5.00 5.09 5.03 102 101 72.0-132 1.19 20
Toluene 5.00 4.98 4.86 99.6 97.2 79.0-120 2.44 20
1,2,3-Trichlorobenzene 5.00 5.34 5.40 107 108 50.0-138 1.12 20
1,2,4-Trichlorobenzene 5.00 5.32 5.26 106 105 57.0-137 1.13 20
1,1,1-Trichloroethane 5.00 5.30 4.99 106 99.8 73.0-124 6.03 20
1,1,2-Trichloroethane 5.00 5.11 5.15 102 103 80.0-120 0.780 20
Trichloroethene 5.00 5.00 5.04 100 101 78.0-124 0.797 20
Trichlorofluoromethane 5.00 5.63 5.76 113 115 59.0-147 2.28 20
1,2,3-Trichloropropane 5.00 4.81 5.00 96.2 100 73.0-130 3.87 20
1,2,4-Trimethylbenzene 5.00 5.10 5.08 102 102 76.0-121 0.393 20
1,3,5-Trimethylbenzene 5.00 4.92 4.97 98.4 99.4 76.0-122 1.01 20
Vinyl chloride 5.00 5.23 5.49 105 110 67.0-131 4.85 20
o-Xylene 5.00 4.91 5.05 98.2 101 80.0-122 2.81 20
m&p-Xylenes 10.0 9.99 9.89 99.9 98.9 80.0-122 1.01 20
(S) Toluene-d8 110 110 80.0-120
(S) 4-Bromofluorobenzene 111 108 77.0-126
(S) 1,2-Dichloroethane-d4 106 107 70.0-130
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:
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QUALITY CONTROL SUMMARYWG2085849
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1628650-06,07,08,09,10,11,12,13
Method Blank (MB)
(MB) R3943072-3 06/28/23 11:30
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
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:53 36 of 50
QUALITY CONTROL SUMMARYWG2085849
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1628650-06,07,08,09,10,11,12,13
Method Blank (MB)
(MB) R3943072-3 06/28/23 11:30
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 104 80.0-120
(S) 4-Bromofluorobenzene 103 77.0-126
(S) 1,2-Dichloroethane-d4 100 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R3943072-1 06/28/23 10:26 • (LCSD) R3943072-2 06/28/23 10:47
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 27.7 21.9 111 87.6 19.0-160 23.4 27
Acrolein 25.0 27.5 25.2 110 101 10.0-160 8.73 26
Acrylonitrile 25.0 25.4 22.8 102 91.2 55.0-149 10.8 20
Benzene 5.00 4.78 4.66 95.6 93.2 70.0-123 2.54 20
Bromobenzene 5.00 4.67 4.64 93.4 92.8 73.0-121 0.644 20
Bromodichloromethane 5.00 4.79 4.60 95.8 92.0 75.0-120 4.05 20
Bromoform 5.00 4.78 4.68 95.6 93.6 68.0-132 2.11 20
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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QUALITY CONTROL SUMMARYWG2085849
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1628650-06,07,08,09,10,11,12,13
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R3943072-1 06/28/23 10:26 • (LCSD) R3943072-2 06/28/23 10:47
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 4.99 4.67 99.8 93.4 10.0-160 6.63 25
n-Butylbenzene 5.00 4.65 4.46 93.0 89.2 73.0-125 4.17 20
sec-Butylbenzene 5.00 4.75 4.58 95.0 91.6 75.0-125 3.64 20
tert-Butylbenzene 5.00 4.83 4.64 96.6 92.8 76.0-124 4.01 20
Carbon tetrachloride 5.00 5.22 4.84 104 96.8 68.0-126 7.55 20
Chlorobenzene 5.00 4.80 4.69 96.0 93.8 80.0-121 2.32 20
Chlorodibromomethane 5.00 4.69 4.55 93.8 91.0 77.0-125 3.03 20
Chloroethane 5.00 4.90 4.81 98.0 96.2 47.0-150 1.85 20
Chloroform 5.00 4.86 4.66 97.2 93.2 73.0-120 4.20 20
Chloromethane 5.00 4.82 4.66 96.4 93.2 41.0-142 3.38 20
2-Chlorotoluene 5.00 4.86 4.86 97.2 97.2 76.0-123 0.000 20
4-Chlorotoluene 5.00 4.69 4.73 93.8 94.6 75.0-122 0.849 20
1,2-Dibromo-3-Chloropropane 5.00 4.52 4.32 90.4 86.4 58.0-134 4.52 20
1,2-Dibromoethane 5.00 4.58 4.66 91.6 93.2 80.0-122 1.73 20
Dibromomethane 5.00 4.85 4.63 97.0 92.6 80.0-120 4.64 20
1,2-Dichlorobenzene 5.00 4.73 4.61 94.6 92.2 79.0-121 2.57 20
1,3-Dichlorobenzene 5.00 4.79 4.70 95.8 94.0 79.0-120 1.90 20
1,4-Dichlorobenzene 5.00 4.62 4.67 92.4 93.4 79.0-120 1.08 20
Dichlorodifluoromethane 5.00 5.02 4.73 100 94.6 51.0-149 5.95 20
1,1-Dichloroethane 5.00 4.81 4.60 96.2 92.0 70.0-126 4.46 20
1,2-Dichloroethane 5.00 4.88 4.73 97.6 94.6 70.0-128 3.12 20
1,1-Dichloroethene 5.00 4.81 4.65 96.2 93.0 71.0-124 3.38 20
cis-1,2-Dichloroethene 5.00 4.68 4.53 93.6 90.6 73.0-120 3.26 20
trans-1,2-Dichloroethene 5.00 4.90 4.73 98.0 94.6 73.0-120 3.53 20
1,2-Dichloropropane 5.00 4.87 4.55 97.4 91.0 77.0-125 6.79 20
1,1-Dichloropropene 5.00 5.03 4.70 101 94.0 74.0-126 6.78 20
1,3-Dichloropropane 5.00 4.69 4.53 93.8 90.6 80.0-120 3.47 20
2,2-Dichloropropane 5.00 5.24 5.11 105 102 58.0-130 2.51 20
Di-isopropyl ether 5.00 4.89 4.59 97.8 91.8 58.0-138 6.33 20
Ethylbenzene 5.00 4.83 4.66 96.6 93.2 79.0-123 3.58 20
Hexachloro-1,3-butadiene 5.00 4.01 3.71 80.2 74.2 54.0-138 7.77 20
Isopropylbenzene 5.00 4.86 4.65 97.2 93.0 76.0-127 4.42 20
p-Isopropyltoluene 5.00 4.69 4.68 93.8 93.6 76.0-125 0.213 20
2-Butanone (MEK)25.0 26.7 22.9 107 91.6 44.0-160 15.3 20
Methylene Chloride 5.00 4.79 4.68 95.8 93.6 67.0-120 2.32 20
4-Methyl-2-pentanone (MIBK)25.0 25.0 23.3 100 93.2 68.0-142 7.04 20
Methyl tert-butyl ether 5.00 5.03 4.63 101 92.6 68.0-125 8.28 20
Naphthalene 5.00 4.15 4.45 83.0 89.0 54.0-135 6.98 20
n-Propylbenzene 5.00 4.78 4.68 95.6 93.6 77.0-124 2.11 20
Styrene 5.00 4.77 4.62 95.4 92.4 73.0-130 3.19 20
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG2085849
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1628650-06,07,08,09,10,11,12,13
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R3943072-1 06/28/23 10:26 • (LCSD) R3943072-2 06/28/23 10:47
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 4.90 4.69 98.0 93.8 75.0-125 4.38 20
1,1,2,2-Tetrachloroethane 5.00 5.06 4.97 101 99.4 65.0-130 1.79 20
Tetrachloroethene 5.00 4.94 4.79 98.8 95.8 72.0-132 3.08 20
Toluene 5.00 4.70 4.63 94.0 92.6 79.0-120 1.50 20
1,2,3-Trichlorobenzene 5.00 3.81 4.67 76.2 93.4 50.0-138 J3 20.3 20
1,2,4-Trichlorobenzene 5.00 4.09 4.41 81.8 88.2 57.0-137 7.53 20
1,1,1-Trichloroethane 5.00 4.97 4.81 99.4 96.2 73.0-124 3.27 20
1,1,2-Trichloroethane 5.00 4.62 4.63 92.4 92.6 80.0-120 0.216 20
Trichloroethene 5.00 4.81 4.65 96.2 93.0 78.0-124 3.38 20
Trichlorofluoromethane 5.00 5.29 5.02 106 100 59.0-147 5.24 20
1,2,3-Trichloropropane 5.00 4.96 4.78 99.2 95.6 73.0-130 3.70 20
1,2,4-Trimethylbenzene 5.00 4.68 4.61 93.6 92.2 76.0-121 1.51 20
1,3,5-Trimethylbenzene 5.00 4.80 4.76 96.0 95.2 76.0-122 0.837 20
Vinyl chloride 5.00 4.90 4.75 98.0 95.0 67.0-131 3.11 20
o-Xylene 5.00 4.71 4.59 94.2 91.8 80.0-122 2.58 20
m&p-Xylenes 10.0 9.76 9.29 97.6 92.9 80.0-122 4.93 20
(S) Toluene-d8 103 106 80.0-120
(S) 4-Bromofluorobenzene 101 101 77.0-126
(S) 1,2-Dichloroethane-d4 107 103 70.0-130
L1628095-05 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD)
(OS) L1628095-05 06/28/23 14:38 • (MS) R3943072-4 06/28/23 19:17 • (MSD) R3943072-5 06/28/23 19:39
Spike Amount Original Result MS Result MSD Result MS Rec.MSD Rec.Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l ug/l %%%%%
Acetone 25.0 U 21.9 23.0 87.6 92.0 1 10.0-160 4.90 35
Acrolein 25.0 U 48.5 50.1 194 200 1 10.0-160 J5 J5 3.25 39
Acrylonitrile 25.0 U 23.5 24.5 94.0 98.0 1 21.0-160 4.17 32
Benzene 5.00 U 6.41 6.61 128 132 1 17.0-158 3.07 27
Bromobenzene 5.00 U 6.33 6.11 127 122 1 30.0-149 3.54 28
Bromodichloromethane 5.00 U 6.14 6.24 123 125 1 31.0-150 1.62 27
Bromoform 5.00 U 5.29 5.54 106 111 1 29.0-150 4.62 29
Bromomethane 5.00 U 5.79 6.54 116 131 1 10.0-160 12.2 38
n-Butylbenzene 5.00 U 6.34 6.26 127 125 1 31.0-150 1.27 30
sec-Butylbenzene 5.00 U 6.31 6.27 126 125 1 33.0-155 0.636 29
tert-Butylbenzene 5.00 U 6.42 6.44 128 129 1 34.0-153 0.311 28
Carbon tetrachloride 5.00 U 7.23 7.41 145 148 1 23.0-159 2.46 28
Chlorobenzene 5.00 U 6.30 6.62 126 132 1 33.0-152 4.95 27
Chlorodibromomethane 5.00 U 5.79 5.79 116 116 1 37.0-149 0.000 27
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 L1628650 07/03/23 14:53 39 of 50
QUALITY CONTROL SUMMARYWG2085849
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1628650-06,07,08,09,10,11,12,13
L1628095-05 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD)
(OS) L1628095-05 06/28/23 14:38 • (MS) R3943072-4 06/28/23 19:17 • (MSD) R3943072-5 06/28/23 19:39
Spike Amount Original Result MS Result MSD Result MS Rec.MSD Rec.Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l ug/l %%%%%
Chloroethane 5.00 U 6.41 6.74 128 135 1 10.0-160 5.02 30
Chloroform 5.00 U 6.41 6.64 128 133 1 29.0-154 3.52 28
Chloromethane 5.00 U 6.32 6.54 126 131 1 10.0-160 3.42 29
2-Chlorotoluene 5.00 U 6.33 6.63 127 133 1 32.0-153 4.63 28
4-Chlorotoluene 5.00 U 6.25 6.40 125 128 1 32.0-150 2.37 28
1,2-Dibromo-3-Chloropropane 5.00 U 4.04 4.33 80.8 86.6 1 22.0-151 6.93 34
1,2-Dibromoethane 5.00 U 5.52 5.68 110 114 1 34.0-147 2.86 27
Dibromomethane 5.00 U 5.99 5.99 120 120 1 30.0-151 0.000 27
1,2-Dichlorobenzene 5.00 U 5.97 6.16 119 123 1 34.0-149 3.13 28
1,3-Dichlorobenzene 5.00 U 6.13 6.19 123 124 1 36.0-146 0.974 27
1,4-Dichlorobenzene 5.00 U 6.23 6.23 125 125 1 35.0-142 0.000 27
Dichlorodifluoromethane 5.00 U 6.56 6.89 131 138 1 10.0-160 4.91 29
1,1-Dichloroethane 5.00 U 6.30 6.69 126 134 1 25.0-158 6.00 27
1,2-Dichloroethane 5.00 U 6.04 6.40 121 128 1 29.0-151 5.79 27
1,1-Dichloroethene 5.00 U 6.52 6.88 130 138 1 11.0-160 5.37 29
cis-1,2-Dichloroethene 5.00 U 6.08 6.40 122 128 1 10.0-160 5.13 27
trans-1,2-Dichloroethene 5.00 U 6.27 6.68 125 134 1 17.0-153 6.33 27
1,2-Dichloropropane 5.00 U 6.18 6.51 124 130 1 30.0-156 5.20 27
1,1-Dichloropropene 5.00 U 6.64 6.96 133 139 1 25.0-158 4.71 27
1,3-Dichloropropane 5.00 U 5.58 5.86 112 117 1 38.0-147 4.90 27
2,2-Dichloropropane 5.00 U 6.40 6.79 128 136 1 24.0-152 5.91 29
Di-isopropyl ether 5.00 U 6.31 6.44 126 129 1 21.0-160 2.04 28
Ethylbenzene 5.00 U 6.59 6.60 132 132 1 30.0-155 0.152 27
Hexachloro-1,3-butadiene 5.00 U 4.73 5.04 94.6 101 1 20.0-154 6.35 34
Isopropylbenzene 5.00 U 6.40 6.64 128 133 1 28.0-157 3.68 27
p-Isopropyltoluene 5.00 U 6.33 6.27 127 125 1 30.0-154 0.952 29
2-Butanone (MEK)25.0 U 21.0 21.8 84.0 87.2 1 10.0-160 3.74 32
Methylene Chloride 5.00 U 6.02 6.25 120 125 1 23.0-144 3.75 28
4-Methyl-2-pentanone (MIBK)25.0 U 22.8 23.3 91.2 93.2 1 29.0-160 2.17 29
Methyl tert-butyl ether 5.00 U 5.61 5.88 112 118 1 28.0-150 4.70 29
Naphthalene 5.00 U 4.75 4.75 95.0 95.0 1 12.0-156 0.000 35
n-Propylbenzene 5.00 U 6.49 6.44 130 129 1 31.0-154 0.773 28
Styrene 5.00 U 6.09 6.31 122 126 1 33.0-155 3.55 28
1,1,1,2-Tetrachloroethane 5.00 U 6.14 6.47 123 129 1 36.0-151 5.23 29
1,1,2,2-Tetrachloroethane 5.00 U 5.60 5.45 112 109 1 33.0-150 2.71 28
Tetrachloroethene 5.00 U 6.74 6.77 135 135 1 10.0-160 0.444 27
Toluene 5.00 U 6.31 6.50 126 130 1 26.0-154 2.97 28
1,2,3-Trichlorobenzene 5.00 U 4.97 5.25 99.4 105 1 17.0-150 5.48 36
1,2,4-Trichlorobenzene 5.00 U 5.17 5.43 103 109 1 24.0-150 4.91 33
1,1,1-Trichloroethane 5.00 U 6.68 7.10 134 142 1 23.0-160 6.10 28
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 L1628650 07/03/23 14:53 40 of 50
QUALITY CONTROL SUMMARYWG2085849
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1628650-06,07,08,09,10,11,12,13
L1628095-05 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD)
(OS) L1628095-05 06/28/23 14:38 • (MS) R3943072-4 06/28/23 19:17 • (MSD) R3943072-5 06/28/23 19:39
Spike Amount Original Result MS Result MSD Result MS Rec.MSD Rec.Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l ug/l %%%%%
1,1,2-Trichloroethane 5.00 U 5.63 5.82 113 116 1 35.0-147 3.32 27
Trichloroethene 5.00 U 6.18 6.39 124 128 1 10.0-160 3.34 25
Trichlorofluoromethane 5.00 U 7.02 7.55 140 151 1 17.0-160 7.28 31
1,2,3-Trichloropropane 5.00 U 5.13 5.17 103 103 1 34.0-151 0.777 29
1,2,4-Trimethylbenzene 5.00 U 6.29 6.21 126 124 1 26.0-154 1.28 27
1,3,5-Trimethylbenzene 5.00 U 6.46 6.35 129 127 1 28.0-153 1.72 27
Vinyl chloride 5.00 U 6.39 6.83 128 137 1 10.0-160 6.66 27
o-Xylene 5.00 U 6.28 6.40 126 128 1 45.0-144 1.89 26
m&p-Xylenes 10.0 U 13.0 13.2 130 132 1 43.0-146 1.53 26
(S) Toluene-d8 105 105 80.0-120
(S) 4-Bromofluorobenzene 101 102 77.0-126
(S) 1,2-Dichloroethane-d4 99.3 103 70.0-130
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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QUALITY CONTROL SUMMARYWG2085949
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1628650-01,02,03,04,05
Method Blank (MB)
(MB) R3942852-2 06/28/23 22:36
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
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:53 42 of 50
QUALITY CONTROL SUMMARYWG2085949
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1628650-01,02,03,04,05
Method Blank (MB)
(MB) R3942852-2 06/28/23 22:36
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 114 80.0-120
(S) 4-Bromofluorobenzene 115 77.0-126
(S) 1,2-Dichloroethane-d4 105 70.0-130
Laboratory Control Sample (LCS)
(LCS) R3942852-1 06/28/23 21:53
Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier
Analyte ug/l ug/l %%
Acetone 25.0 22.7 90.8 19.0-160
Acrolein 25.0 18.7 74.8 10.0-160
Acrylonitrile 25.0 19.9 79.6 55.0-149
Benzene 5.00 4.42 88.4 70.0-123
Bromobenzene 5.00 4.05 81.0 73.0-121
Bromodichloromethane 5.00 4.54 90.8 75.0-120
Bromoform 5.00 4.60 92.0 68.0-132
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:33 43 of 50
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Excel Civil & Environmental Associates L1628650 07/03/23 14:53 43 of 50
QUALITY CONTROL SUMMARYWG2085949
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1628650-01,02,03,04,05
Laboratory Control Sample (LCS)
(LCS) R3942852-1 06/28/23 21:53
Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier
Analyte ug/l ug/l %%
Bromomethane 5.00 4.85 97.0 10.0-160
n-Butylbenzene 5.00 4.04 80.8 73.0-125
sec-Butylbenzene 5.00 4.30 86.0 75.0-125
tert-Butylbenzene 5.00 4.27 85.4 76.0-124
Carbon tetrachloride 5.00 4.67 93.4 68.0-126
Chlorobenzene 5.00 4.57 91.4 80.0-121
Chlorodibromomethane 5.00 4.46 89.2 77.0-125
Chloroethane 5.00 5.53 111 47.0-150
Chloroform 5.00 4.55 91.0 73.0-120
Chloromethane 5.00 3.94 78.8 41.0-142
2-Chlorotoluene 5.00 4.30 86.0 76.0-123
4-Chlorotoluene 5.00 4.17 83.4 75.0-122
1,2-Dibromo-3-Chloropropane 5.00 4.14 82.8 58.0-134
1,2-Dibromoethane 5.00 4.60 92.0 80.0-122
Dibromomethane 5.00 4.50 90.0 80.0-120
1,2-Dichlorobenzene 5.00 4.47 89.4 79.0-121
1,3-Dichlorobenzene 5.00 4.57 91.4 79.0-120
1,4-Dichlorobenzene 5.00 4.37 87.4 79.0-120
Dichlorodifluoromethane 5.00 4.82 96.4 51.0-149
1,1-Dichloroethane 5.00 4.37 87.4 70.0-126
1,2-Dichloroethane 5.00 4.42 88.4 70.0-128
1,1-Dichloroethene 5.00 4.75 95.0 71.0-124
cis-1,2-Dichloroethene 5.00 4.66 93.2 73.0-120
trans-1,2-Dichloroethene 5.00 4.32 86.4 73.0-120
1,2-Dichloropropane 5.00 4.37 87.4 77.0-125
1,1-Dichloropropene 5.00 4.45 89.0 74.0-126
1,3-Dichloropropane 5.00 4.34 86.8 80.0-120
2,2-Dichloropropane 5.00 4.03 80.6 58.0-130
Di-isopropyl ether 5.00 3.84 76.8 58.0-138
Ethylbenzene 5.00 4.79 95.8 79.0-123
Hexachloro-1,3-butadiene 5.00 4.85 97.0 54.0-138
Isopropylbenzene 5.00 4.51 90.2 76.0-127
p-Isopropyltoluene 5.00 4.35 87.0 76.0-125
2-Butanone (MEK)25.0 21.4 85.6 44.0-160
Methylene Chloride 5.00 4.46 89.2 67.0-120
4-Methyl-2-pentanone (MIBK)25.0 21.4 85.6 68.0-142
Methyl tert-butyl ether 5.00 4.41 88.2 68.0-125
Naphthalene 5.00 4.36 87.2 54.0-135
n-Propylbenzene 5.00 4.07 81.4 77.0-124
Styrene 5.00 4.48 89.6 73.0-130
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG2085949
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1628650-01,02,03,04,05
Laboratory Control Sample (LCS)
(LCS) R3942852-1 06/28/23 21:53
Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier
Analyte ug/l ug/l %%
1,1,1,2-Tetrachloroethane 5.00 4.68 93.6 75.0-125
1,1,2,2-Tetrachloroethane 5.00 3.87 77.4 65.0-130
Tetrachloroethene 5.00 4.93 98.6 72.0-132
Toluene 5.00 4.43 88.6 79.0-120
1,2,3-Trichlorobenzene 5.00 4.75 95.0 50.0-138
1,2,4-Trichlorobenzene 5.00 4.73 94.6 57.0-137
1,1,1-Trichloroethane 5.00 4.59 91.8 73.0-124
1,1,2-Trichloroethane 5.00 4.22 84.4 80.0-120
Trichloroethene 5.00 5.07 101 78.0-124
Trichlorofluoromethane 5.00 5.71 114 59.0-147
1,2,3-Trichloropropane 5.00 4.47 89.4 73.0-130
1,2,4-Trimethylbenzene 5.00 4.23 84.6 76.0-121
1,3,5-Trimethylbenzene 5.00 4.28 85.6 76.0-122
Vinyl chloride 5.00 5.00 100 67.0-131
o-Xylene 5.00 4.62 92.4 80.0-122
m&p-Xylenes 10.0 8.92 89.2 80.0-122
(S) Toluene-d8 111 80.0-120
(S) 4-Bromofluorobenzene 113 77.0-126
(S) 1,2-Dichloroethane-d4 107 70.0-130
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG2087771
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1628650-09,12
Method Blank (MB)
(MB) R3944167-3 07/01/23 12:31
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
Methyl tert-butyl ether U 0.101 1.00
(S) Toluene-d8 106 80.0-120
(S) 4-Bromofluorobenzene 96.3 77.0-126
(S) 1,2-Dichloroethane-d4 111 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R3944167-1 07/01/23 11:25 • (LCSD) R3944167-2 07/01/23 11:47
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 %%%%%
Methyl tert-butyl ether 5.00 4.84 4.91 96.8 98.2 68.0-125 1.44 20
(S) Toluene-d8 103 104 80.0-120
(S) 4-Bromofluorobenzene 99.6 102 77.0-126
(S) 1,2-Dichloroethane-d4 111 110 70.0-130
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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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.
Original Sample The non-spiked sample in the prep batch used to determine the Relative Percent Difference (RPD) from a quality control
sample. The Original Sample may not be included within the reported SDG.
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
J The identification of the analyte is acceptable; the reported value is an estimate.
J3 The associated batch QC was outside the established quality control range for precision.
J5 The sample matrix interfered with the ability to make any accurate determination; spike value is high.
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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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
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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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.
Table 4 (8A/B)
Historical Free Product Data
(Former) SERVCO No. 01711
850 North Liberty Street
Winston-Salem, North Carolina
Well ID Date Product
Type
Casing
Diameter (in)
Product
Thickness Before
Recovery (ft)
Product
Thickness
After Recovery
(ft)
Amount
Recovered
(gal)
Depth to
Water (ft)
03/21/00 5.08 -- 63.5 – AFVR 42.17
03/30/00 1.30 -- 2.0 – HB 39.31
04/27/00 1.40 -- 32.2 – AFVR 37.50
07/19/00 1.93 -- 21.8 – AFVR 39.78
07/26/00 2.82 -- 4.2 – HB 40.48
08/15/00 1.81 -- 24.6 – AFVR 39.96
08/22/00 1.30 -- 0.0 – ND 39.49
01/10/02 4.55 -- 50.2 – AFVR 43.75
01/16/02 0.55 -- 0.0 – ND 40.77
02/05/02 0.92 -- 35.9 – AFVR 41.14
02/20/02 0.54 -- 0.0 – ND 40.96
03/20/02 0.40 -- 22.5 – AFVR 40.73
05/22/02 0.71 -- 64.3 – AFVR 41.46
9/29 – 10/3/03 1.94 0.09 161.2 – MMPE 38.88
2/16 – 2/20/04 0.64 0.00 85.5 – MMPE 37.15
1/22 – 1/26/07 2.34 0.00 583 – MMPE 37.56
02/20/07 0.40 0.00 0.00 – ND 37.75
05/12/09 2.58 0.04 1.0 – HB 40.92
03/08/10 1.56 -- -- 38.70
11/02/10 1.57 -- -- 37.50
05/19/11 0.96 -- -- 37.71
11/21/13 1.74 -- -- 38.78
05/28/15 trace -- -- 36.90
11/17/15 0.05 -- -- 37.22
03/24/17 0.17 -- -- 36.20
10/12/17 0.00 -- -- 35.62
03/25/21 0.59 -- -- 33.19
09/15/21 0.50 -- -- 33.31
06/23/22 0.02 -- -- 34.96
06/21/23 0.02 -- -- 35.60
03/08/10 0.00 -- -- 38.42
11/02/10 1.91 -- -- 37.61
05/19/11 2.29 -- -- 38.97
11/21/13 2.20 -- -- 38.85
05/28/15 0.05 -- -- 37.05
11/17/15 0.00 -- -- 36.82
03/24/17 0.02 -- -- 37.72
10/12/17 0.12 -- -- 35.73
03/25/21 0.00 -- -- 32.70
09/15/21 0.00 -- -- 33.14
06/23/22 0.00 -- -- 34.83
06/21/23 0.00 -- -- 34.87
TOTAL 1,218 gallons
NOTES:
Free product recovery system was started up in January 2015 at both MW-2 and MW-4.
* - Indicates data from other consultants
in - inches ft - feet
gal - gallons
MW-4
GAS 2
MW-2
5/12/2009 39.74 -- -- 59.70
3/8/2010 38.41 -- -- 61.03
11/2/2010 37.08 -- -- 62.36
5/19/2011 37.81 -- -- 61.63
11/21/2013 38.97 -- -- 60.47
5/28/2015 37.53 -- -- 61.91
11/17/2015 38.22 -- -- 61.22
3/24/2017 37.31 -- -- 62.13
10/12/2017 36.64 -- -- 62.80
3/21-12/22
6/21/2023 37.65 -- -- 61.79
* 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
Depth to Water*
(Uncorrected)
(feet)
MW-1 99.44 37-47
Not Located
TABLE B-9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS
Revision Date: August 8, 2023
(FORMER) SERVCO NO. 01711
850 NORTH LIBERTY STREET, WINSTON-SALEM, NORTH CAROLINA
NCDEQ Incident No. 20966 / Facility Id No. 00-0-0000015707
Excel Project No. 24090
Top 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)
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
1/26/2023 35.99 0.09 35.91 62.74
2/22/2023 35.76 0.00 -- 62.89
3/22/2023 35.82 0.01 35.81 62.84
4/19/2023 35.71 0.00 -- 62.94
5/17/2023 35.37 0.00 -- 63.28
6/21/2023 35.60 0.00 -- 63.05
* 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
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)
Excel Project No. 24090
TABLE B-9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS
Revision Date: August 8, 2023
(FORMER) SERVCO NO. 01711
850 NORTH LIBERTY STREET, WINSTON-SALEM, NORTH CAROLINA
NCDEQ Incident No. 20966 / Facility Id No. 00-0-0000015707
3/25/2021 32.63 -- -- 65.38
8/2/2021
9/15/2021 32.84 -- -- 65.17
10/13/2021 33.29 -- -- 64.72
11/29/2021 33.50 -- -- 64.51
12/29/2021 33.70 -- -- 64.31
1/20/2022
2/17/2022 34.08 -- -- 63.93
3/18/2022 34.58 -- -- 63.43
4/27/2022 34.73 -- -- 63.28
5/23/2022 34.93 -- -- 63.08
6/23/2022 33.29 -- -- 64.72
7/20/2022 35.01 -- -- 63.00
8/24/2022 35.28 -- 62.73
9/21/2022 35.34 -- -- 62.67
10/19/2022 35.53 -- -- 62.48
11/22/2022 35.62 -- -- 62.39
12/29/2022 33.29 -- -- 64.72
1/26/2023 35.74 -- -- 62.27
2/22/2023 35.55 -- -- 62.46
3/22/2023 35.68 -- -- 62.33
4/19/2023 35.51 -- -- 62.50
5/17/2023 35.25 -- -- 62.76
6/21/2023 35.22 -- -- 62.79
* 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
MW-2R 98.01 22-47
Not Measured
Depth 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
Excel Project No. 24090
TABLE B-9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS
Revision Date: August 8, 2023
(FORMER) SERVCO NO. 01711
850 NORTH LIBERTY STREET, WINSTON-SALEM, NORTH CAROLINA
NCDEQ Incident No. 20966 / Facility Id No. 00-0-0000015707
3/8/2010
11/2/2010 36.25 -- -- 62.31
5/19/2011 37.18 -- -- 61.38
11/21/2013 37.50 -- -- 61.06
5/28/2015 36.98 -- -- 61.58
11/17/2015 37.48 -- -- 61.08
3/24/2017
10/12/2017 35.88 -- -- 62.68
3/25/2021
9/15/2021 34.30 -- -- 64.26
6/23/2022 36.06 -- -- 62.50
12/29/2022 36.82 -- -- 61.74
6/21/2023 36.29 -- -- 62.27
* Depth to Water is measured from Top of Casing
Depth to Water*
(Corrected for
NAPL Thickness)
(feet)
Groundwater
Surface
Elevation**
(AMSL)
MW-3 98.56 37-47 Not Located
Not Located
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)
Not Located
Excel Project No. 24090
TABLE B-9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS
Revision Date: August 8, 2023
(FORMER) SERVCO NO. 01711
850 NORTH LIBERTY STREET, WINSTON-SALEM, NORTH CAROLINA
NCDEQ Incident No. 20966 / Facility Id No. 00-0-0000015707
** 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
3/8/2010 38.42 -- 38.42 60.02
11/2/2010 37.61 1.91 35.97 62.47
5/19/2011 38.97 2.29 37.00 61.44
11/21/2013 38.85 2.2 36.96 61.48
5/28/2015 37.05 0.05 37.01 61.43
11/17/2015 36.82 -- 36.82 61.62
3/24/2017 37.72 0.02 37.70 60.74
10/12/2017 35.73 0.12 35.63 62.81
3/25/2021 32.70 -- -- 65.74
8/2/2021 32.95 -- -- 65.49
9/15/2021 33.14 -- -- 65.30
10/13/2021 33.35 -- -- 65.09
11/29/2021 33.79 -- -- 64.65
12/29/2021 34.03 -- -- 64.41
1/20/2022 34.40 -- -- 64.04
2/17/2022 34.30 -- -- 64.14
3/18/2022 34.63 -- -- 63.81
4/27/2022 34.66 -- -- 63.78
5/23/2022 34.87 -- -- 63.57
6/23/2022 34.69 -- -- 63.75
7/20/2022 34.96 -- -- 63.48
8/24/2022 35.22 -- -- 63.22
9/21/2022 35.30 -- -- 63.14
10/19/2022 35.45 -- -- 62.99
11/22/2022 35.55 -- -- 62.89
12/29/2022 35.43 -- -- 63.01
1/26/2023 35.44 -- -- 63.00
2/22/2023 35.15 -- -- 63.29
3/22/2023 35.22 -- -- 63.22
4/19/2023 35.06 -- -- 63.38
5/17/2023 34.89 -- -- 63.55
6/21/2023 34.87 -- -- 63.57
* 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
Depth to
Water*
(Corrected for
NAPL Thickness)
(feet)
Groundwater
Surface
Elevation**
(AMSL)
MW-4 98.44 38-48
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)
Excel Project No. 24090
TABLE B-9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS
Revision Date: August 8, 2023
(FORMER) SERVCO NO. 01711
850 NORTH LIBERTY STREET, WINSTON-SALEM, NORTH CAROLINA
NCDEQ Incident No. 20966 / Facility Id No. 00-0-0000015707
3/25/2021 32.57 -- -- 65.07
8/2/2021 32.83 -- -- 64.81
9/15/2021 32.98 -- -- 64.66
10/13/2021 33.19 -- -- 64.45
11/29/2021 33.64 -- -- 64.00
12/29/2021 33.90 -- -- 63.74
1/20/2022 34.22 -- -- 63.42
2/17/2022 34.21 -- -- 63.43
3/18/2022 34.53 -- -- 63.11
4/27/2022 34.56 -- -- 63.08
5/23/2022 34.72 -- -- 62.92
6/23/2022 34.69 -- -- 62.95
7/20/2022 34.87 -- -- 62.77
8/24/2022 35.10 -- -- 62.54
9/21/2022 35.18 -- -- 62.46
10/19/2022 35.34 -- -- 62.30
11/22/2022 35.48 -- -- 62.16
12/29/2022 35.53 -- -- 62.11
1/26/2023 35.55 -- -- 62.09
2/22/2023 35.03 -- -- 62.61
3/22/2023 35.09 -- -- 62.55
4/19/2023 34.95 -- -- 62.69
5/17/2023 34.76 -- -- 62.88
6/21/2023 34.73 -- -- 62.91
* 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
MW-4R 97.64 23-48
Depth 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)
Excel Project No. 24090
TABLE B-9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS
Revision Date: August 8, 2023
(FORMER) SERVCO NO. 01711
850 NORTH LIBERTY STREET, WINSTON-SALEM, NORTH CAROLINA
NCDEQ Incident No. 20966 / Facility Id No. 00-0-0000015707
3/8/2010
11/2/2010
5/19/2011
11/21/2013
5/28/2015
11/17/2015
3/24/2017
10/12/2017
3/25/2021
* 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 Measured
Depth to Water*
(Corrected for
NAPL Thickness)
(feet)
Groundwater
Surface
Elevation**
(AMSL)
MW-5 100.00 39.49 Not Located - Assumed Destroyed
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)
Excel Project No. 24090
TABLE B-9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS
Revision Date: August 8, 2023
(FORMER) SERVCO NO. 01711
850 NORTH LIBERTY STREET, WINSTON-SALEM, NORTH CAROLINA
NCDEQ Incident No. 20966 / Facility Id No. 00-0-0000015707
3/8/2010 38.31 -- -- 59.89
11/2/2010 37.05 -- -- 61.15
5/19/2011 36.70 -- -- 61.50
11/21/2013 37.03 -- -- 61.17
5/28/2015 36.44 -- -- 61.76
11/17/2015 37.17 -- -- 61.03
3/24/2017 36.38 -- -- 61.82
10/12/2017 35.46 -- -- 62.74
3/25/2021 32.44 -- -- 65.76
9/15/2021 32.68 -- -- 65.52
6/23/2022 34.81 -- -- 63.39
12/29/2022 35.83 -- -- 62.37
6/21/2023 35.68 -- -- 62.52
* Depth to Water is measured from Top of Casing
Depth to Water*
(Corrected for
NAPL Thickness)
(feet)
Groundwater
Surface
Elevation**
(AMSL)
MW-6 98.20 25-45
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)
Excel Project No. 24090
TABLE B-9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS
Revision Date: August 8, 2023
(FORMER) SERVCO NO. 01711
850 NORTH LIBERTY STREET, WINSTON-SALEM, NORTH CAROLINA
NCDEQ Incident No. 20966 / Facility Id No. 00-0-0000015707
** 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
3/8/2010 36.84 -- -- 62.43
11/2/2010 35.75 -- -- 63.52
5/19/2011 37.91 -- -- 61.36
11/21/2013 38.27 -- -- 61.00
5/28/2015 37.71 -- -- 61.56
11/17/2015 38.34 -- -- 60.93
3/24/2017 37.49 -- -- 61.78
10/12/2017 36.69 -- -- 62.58
3/25/2021 34.06 -- -- 65.21
9/15/2021 34.22 -- -- 65.05
6/23/2022 36.24 -- -- 63.03
12/29/2022 37.15 -- -- 62.12
6/21/2023 37.20 -- -- 62.07
* Depth to Water is measured from Top of Casing
Depth to Water*
(Corrected for
NAPL Thickness)
(feet)
Groundwater
Surface
Elevation**
(AMSL)
MW-7 99.27 25-45
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)
Excel Project No. 24090
TABLE B-9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS
Revision Date: August 8, 2023
(FORMER) SERVCO NO. 01711
850 NORTH LIBERTY STREET, WINSTON-SALEM, NORTH CAROLINA
NCDEQ Incident No. 20966 / Facility Id No. 00-0-0000015707
** 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
5/19/2011 38.53 -- -- 61.62
11/21/2013 38.05 -- -- 62.10
5/28/2015 38.11 -- -- 62.04
11/17/2015 38.86 -- -- 61.29
3/24/2017 38.03 -- -- 62.12
10/12/2017 37.32 -- -- 62.83
3/2021-12-2022
6/21/2023 37.80 -- -- 62.35
* 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
Depth to Water*
(Corrected for
NAPL Thickness)
(feet)
Groundwater
Surface
Elevation**
(AMSL)
MW-8 100.15 25-45
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)
Not Located
Excel Project No. 24090
TABLE B-9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS
Revision Date: August 8, 2023
(FORMER) SERVCO NO. 01711
850 NORTH LIBERTY STREET, WINSTON-SALEM, NORTH CAROLINA
NCDEQ Incident No. 20966 / Facility Id No. 00-0-0000015707
5/19/2011 36.39 -- -- 60.53
11/21/2013 36.58 -- -- 60.34
5/28/2015 36.68 -- -- 60.24
11/17/2015 37.30 -- -- 59.62
3/24/2017 36.02 -- -- 60.90
10/12/2017 35.26 -- -- 61.66
3/25/2021 32.06 -- -- 64.86
9/15/2021 32.53 -- -- 64.39
6/23/2022 34.72 -- -- 62.20
12/29/2022 35.76 -- -- 61.16
6/21/2023 35.37 -- -- 61.55
* 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
Depth to Water*
(Corrected for
NAPL Thickness)
(feet)
Groundwater
Surface
Elevation**
(AMSL)
MW-9 96.92 25-45
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)
Excel Project No. 24090
TABLE B-9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS
Revision Date: August 8, 2023
(FORMER) SERVCO NO. 01711
850 NORTH LIBERTY STREET, WINSTON-SALEM, NORTH CAROLINA
NCDEQ Incident No. 20966 / Facility Id No. 00-0-0000015707
5/19/2011 38.24 -- -- 60.04
11/21/2013 38.51 -- -- 59.77
5/28/2015 38.67 -- -- 59.61
11/17/2015 39.10 -- -- 59.18
3/24/2017 38.09 -- -- 60.19
10/12/2017 37.18 -- -- 61.10
3/25/2021 34.52 -- -- 63.76
9/15/2021 34.90 -- -- 63.38
6/23/2022 36.75 -- -- 61.53
12/29/2022 37.60 -- -- 60.68
6/21/2023 37.36 -- -- 60.92
* 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
Depth to Water*
(Corrected for
NAPL Thickness)
(feet)
Groundwater
Surface
Elevation**
(AMSL)
MW-10 98.28 25-45
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)
Excel Project No. 24090
TABLE B-9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS
Revision Date: August 8, 2023
(FORMER) SERVCO NO. 01711
850 NORTH LIBERTY STREET, WINSTON-SALEM, NORTH CAROLINA
NCDEQ Incident No. 20966 / Facility Id No. 00-0-0000015707
5/19/2011 37.64 -- -- 59.55
11/21/2013 37.97 -- -- 59.22
5/28/2015 37.92 -- -- 59.27
11/17/2015 38.26 -- -- 58.93
3/24/2017 37.22 -- -- 59.97
10/12/2017 36.63 -- -- 60.56
3/25/2021 34.64 -- -- 62.55
9/15/2021 35.10 -- -- 62.09
6/23/2022 37.51 -- -- 59.68
12/29/2022 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 Measured
Depth to Water*
(Corrected for
NAPL Thickness)
(feet)
Groundwater
Surface
Elevation**
(AMSL)
MW-11 97.19 25-45
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)
Excel Project No. 24090
TABLE B-9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS
Revision Date: August 8, 2023
(FORMER) SERVCO NO. 01711
850 NORTH LIBERTY STREET, WINSTON-SALEM, NORTH CAROLINA
NCDEQ Incident No. 20966 / Facility Id No. 00-0-0000015707
5/19/2011 38.42 -- -- 60.96
11/21/2013 38.80 -- -- 60.58
5/28/2015
11/17/2015
3/24/2017
10/12/2017
3/2021-6/2023
* 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
Depth to Water*
(Corrected for
NAPL Thickness)
(feet)
Groundwater
Surface
Elevation**
(AMSL)
MW-12 99.38 25-45
Not Located
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)
Excel Project No. 24090
TABLE B-9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS
Revision Date: August 8, 2023
(FORMER) SERVCO NO. 01711
850 NORTH LIBERTY STREET, WINSTON-SALEM, NORTH CAROLINA
NCDEQ Incident No. 20966 / Facility Id No. 00-0-0000015707
5/28/2015 37.08 -- -- 60.48
11/17/2015 36.83 -- -- 60.73
3/24/2017 36.46 -- -- 61.10
10/12/2017 35.41 -- -- 62.15
3/25/2021 32.09 -- -- 65.47
9/15/2021 33.93 -- -- 63.63
6/23/2022 35.41 -- -- 62.15
12/29/2022 35.72 -- -- 61.84
6/21/2023 35.88 -- -- 61.68
* 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 Measured
Depth to Water*
(Corrected for
NAPL Thickness)
(feet)
Groundwater
Surface
Elevation**
(AMSL)
MW-13 97.56 25-45
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)
Excel Project No. 24090
TABLE B-9: CURRENT and HISTORICAL GROUNDWATER ELEVATIONS and NAPL THICKNESS
Revision Date: August 8, 2023
(FORMER) SERVCO NO. 01711
850 NORTH LIBERTY STREET, WINSTON-SALEM, NORTH CAROLINA
NCDEQ Incident No. 20966 / Facility Id No. 00-0-0000015707

17
Table B-12: Evaluation of Change in Contaminant Mass
Revision Date: 8/9/23 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 12/2022 6/2023
Measured Mass2 -
Soil Source Zone:
Smear Source Zone:
LNAPL 89,789 149,288 418,216 148,708 734,910 619,210 37,986 --
Groundwater Zone: 155,622 106,102 141,360 53,059 40,615 51,970 60,884 54,237 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 98,870 54,237 5,300
Estimated Reduction Rate5: -4.1% -119.1% 63.9% -284.4 13.4 85.3 45.14
Reference Milestone (label from above)
Reference Milestone (value from above)
Reduction Progress vs Milestone6: -47.2 -104.6 -37.1 -145.3 -125.6 -17.65 -9.23
1. 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