27011_Revels Esso_ Rpt of Additional Services 20220912 sealed

September 21, 2023

Mrs. Carolyn Minnich NCDEQ, DWM, Brownfields Redevelopment Section 610 East Center Avenue, Suite 301 Mooresville, North Carolina 28115

Reference: Report of Additional Assessment Services
Graham and 6th Site
301 North Graham Street and 420 West 6th Street
Charlotte, Mecklenburg County, North Carolina
ECS Project No. 49:13734-BA

Mrs. Minnich:

On behalf of our client, Daniel Realty Company, LLC, ECS has prepared this sealed cover letter for the
above-referenced report. As such, I Scott Young, a Licensed Geologist for ECS Southeast, LLP, do certify
that the information contained in the referenced report is correct and accurate to the best of my
knowledge, and at the time of the completion of the report.

Respectfully,

ECS SOUTHEAST, LLP as represented by:

Scott Young, P.G. Joseph P. Nestor, P.G., P.E.
Senior Environmental Project Manager Environmental Principal
[e-mail] [e-mail]
704-525-5152 704-525-5152

September 12, 2022 Mr. Scott Wearren Daniel Realty Company, LLC 505 20th Street N, Suite 100 Birmingham, Alabama 35203 Reference: Report of Additional Assessment Services Graham and 6th Site 301 North Graham Street and 420 West 6th Street Charlotte, Mecklenburg County, North Carolina ECS Project No. 49:13734-B Dear Mr. Wearren: ECS Southeast, LLP (ECS) is pleased to provide Daniel Realty Company, LLC with the results of our environmental assessment for the above-referenced site. ECS’s services were provided in accordance with ECS proposal No. 49:26392P Rev 1.0, dated August 4, 2022, and authorized on August 8, 2022. ECS appreciates the opportunity to provide our services to you. If there are questions regarding this report, or a need for further information, please contact us. Respectfully submitted, ECS SOUTHEAST, LLP
Scott Young, P.G. Joseph P. Nestor, P.G., P.E.
Senior Environmental Project Manager Environmental Principal
[e-mail] [e-mail]
704-525-5152 704-280-7422
Report of Additional Assessment Services
Graham and 6th Site
301 N. Graham St. and 420 W. 6th St.
Charlotte, Mecklenburg County, North Carolina
ECS Project No. 49:13734-B
September 12, 2022

1
TABLE OF CONTENTS 1.0 PROJECT INFORMATION .................................................................................................................... 1
2.0 SCOPE OF SERVICES ............................................................................................................................ 2
2.1 Utility Locate........................................................................................................................................ 2
2.2 Soil Gas Sample Collection .................................................................................................................. 2
3.0 RESULTS .............................................................................................................................................. 3
4.0 CONCLUSIONS .................................................................................................................................... 3
5.0 RECOMMENDATIONS ......................................................................................................................... 4
6.0 QUALIFICATIONS OF REPORT ............................................................................................................. 4
FIGURES Figure 1 USGS Topographic Map Figure 2 Previous Sample Locations Map Figure 3 Current Sample Locations Map TABLES Table 1 Summary of Soil Gas Samples Analytical Results APPENDICES Appendix A Installation and Sampling Forms Appendix B Laboratory Analytical Report and Chain of Custody Record Appendix C NCDEQ Risk Calculator Output
Report of Additional Assessment Services
Graham and 6th Site
301 N. Graham St. and 420 W. 6th St.
Charlotte, Mecklenburg County, North Carolina
ECS Project No. 49:13734-B
September 12, 2022

1
1.0 PROJECT INFORMATION

The subject property is located at 301 North Graham Street and 420 West 6th Street, Charlotte,
Mecklenburg County, North Carolina (Figure 1) and identified by Mecklenburg County GIS as Parcel
Identification Numbers 07806401 and 07806402 and is owned by Gerrard Family LLC & Mant Properties
LLC. The subject property is approximately 1.64 acres in size. The on-site buildings are reported as being
constructed in 1928 and 1950 and contain approximately 18,400 and 7,000 square feet of space,
respectively. The buildings were vacant at the time of the field reconnaissance, and formerly were used
as a tire service business. The buildings consisted of offices, warehouse space, service areas, and a
basement. The remaining portions of the subject property consisted of grassed and paved parking areas.
ECS previously conducted a Phase I Environmental Site Assessment (Phase I ESA) for the subject property
(ECS Project No. 49:13734, dated April 28, 2021). ECS noted the following Recognized Environmental
Conditions (RECs) in the Phase I ESA:
• ECS observed staining in the location of a former above ground storage tank (AST) that was
associated with the former auto service operations. ECS considered the potential for the observed
staining to impact the subject property to be a REC.
• ECS observed a potential former underground hydraulic lift that appeared to have been filled. ECS
considered the potential for the apparent former underground hydraulic lift to impact the subject
property to be a REC.
• ECS considered the potential for the reported former heating oil underground storage tank (UST)
at the subject property to impact the subject property to be a REC.
• ECS considered the historical use of the subject property as a gasoline station to be a REC based
on the potential for an undocumented release to impact the subject property.
• ECS considered the historical use of the subject property for auto repair and servicing to be a REC
based on the potential for an undocumented release to impact the subject property.
• ECS considered the historical use of the subject property as a junkyard to be a REC based on the
potential for an undocumented release to impact the subject property.
• ECS considered the Leaking Underground Storage Tank (LUST) incidents at surrounding and
upgradient properties to be RECs based on documented groundwater contamination, the inferred
direction of groundwater flow toward the subject property based on surface topography, and the
potential for contaminants to migrate and impact the subject property.
• ECS considered the surrounding, upgradient dry-cleaning and historical dry-cleaning facilities to
be RECs for the subject property based on the potential for undocumented releases of dry-
cleaning solvents from these facilities to migrate and impact the subject property.
• ECS considered the surrounding and upgradient historical auto stations to be RECs based on the
potential for undocumented releases to migrate and impact the subject property.

In an effort to determine if the subject property had been adversely affected by the identified RECs and
CREC, ECS was requested to conduct an environmental assessment of the site.

ECS submitted a Report of Environmental Assessment Services (ECS Project No.: 49:13734-A) on August
30, 2021. ECS collected 11 groundwater samples (GW-1 through GW-11) and six soil samples (SB-1
through SB-6) during the assessment activities. The sample locations are indicated on Figure 2. Based on
Report of Additional Assessment Services
Graham and 6th Site
301 N. Graham St. and 420 W. 6th St.
Charlotte, Mecklenburg County, North Carolina
ECS Project No. 49:13734-B
September 12, 2022

2
the results of the assessment activities, groundwater compound concentrations greater than the NCDEQ
Residential Vapor Intrusion Screening Levels was noted in the GW-8 and GW-9 groundwater samples. As
such, ECS recommended soil vapor samples be collected in the vicinity of these groundwater samples in
order to assess if a vapor risk exists at the site.

Following a telephone conversation between Daniel Realty Company, LLC and ECS, ECS was requested to
to conduct the proposed additional assessment activities
2.0 SCOPE OF SERVICES

The environmental assessment included the collection and laboratory analysis of soil gas samples. Drilling
activities were conducted using a Geoprobe® Direct Push Technology (DPT) drill rig. The drilling
subcontractor used for this assessment was 3D Environmental Investigations, LLC (3D). Drilling and
sampling activities were conducted on August 19, 2022.

2.1 Utility Locate

Prior to commencing with field activities, ECS contacted North Carolina One-Call to locate/mark public
utilities at the site. Required separation distances between subsurface activities and marked utilities
(typically 30-inches) were maintained during the field activities. In addition, ECS contracted with KCI to
clear the boring areas of private utilities.

2.2 Soil Gas Sample Collection

Four shallow soil gas sampling probes (SG-1, SG-2, SG-3, and SG-4) were installed to depths of six feet
below ground surface (bgs) advanced by a DPT drill rig at the locations shown on Figure 2. Once the
boring reached the desired depth, a dedicated Nylaflow tubing, and air stone was lowered into the
boring to an approximate depth of five feet bgs. Approximately one foot of clean coarse sand was placed
around and above the air stone and a bentonite seal was placed to a depth of approximately one foot
bgs and hydrated. The bentonite seal was allowed to hydrate at least overnight before sampling. A
dedicated syringe was used at each sample location and connected to the tubing to purge the tubing.
Three volumes of the tubing were purged prior to sample collection.

Prior to collecting the soil gas samples, laboratory grade helium gas was used as a quality assurance /
quality control (QA/QC) measure to confirm the integrity of the probe seal at each sample location. A
shroud that enclosed the fittings and sample train was placed over each newly installed vapor point and
filled with helium. The sample tubing and tracer gas tubing was placed through the shroud wall via rubber
grommets. During the purging stage, the shroud was flooded with laboratory grade helium via the hose
placed through the shroud wall. A Model MGD-2002 Multi-Gas Leak detector was connected to the
probe tube and the air stream being purged was measured for helium. During leak check activities,
helium concentrations remained above 10 percent in air by volume in each shroud and below 10 percent
of the concentration of Helium inside of the shroud in each sample train. In addition to the leak check, a
shut-in test was conducted to assess for leaks in the fittings and regulator.

Report of Additional Assessment Services
Graham and 6th Site
301 N. Graham St. and 420 W. 6th St.
Charlotte, Mecklenburg County, North Carolina
ECS Project No. 49:13734-B
September 12, 2022

3
Following purging, the vapor point was connected to a 1-liter Summa canister, which was used to collect
the samples. The Summa canister was fitted with a five-minute flow regulator. ECS checked and noted
the vacuum on each Summa Canister before initiating the sampling procedure. The sampling procedure
was terminated when the vacuum reading was approximately five inches of mercury. Installation and
sampling forms for each soil gas sample point are included in Appendix A.

Following sample collection, the Summa canisters were repackaged and shipped to Pace Analytical
Services, LLC located in East Longmeadow, Massachusetts. Chain-of-Custody (COC) protocol was utilized
throughout the collection and transport of the samples. As previously stated, the soil samples collected
were submitted for laboratory analysis of VOCs by EPA Method TO-15. A copy of the COC form is
included in Appendix B.

3.0 RESULTS

Review of the laboratory analytical results for the soil gas samples collected indicated concentrations of
benzene in the SG-1, SG-2, and SG-4 soil gas samples and cyclohexane, heptane, and hexane in the SG-4
soil gas sample greater than their respective Residential Groundwater Vapor Intrusion Screening Levels
(VISLs). The concentrations of benzene, heptane, and hexane detected in the SG-4 soil gas sample were
also greater than their respective Non-Residential VISLs. Additional compounds were detected in each of
the soil gas samples collected at concentrations greater than the laboratory method detection limits, but
less than their respective Residential and Non-Residential VISLs. The laboratory analytical results are
summarized on Table 1. A copy of the laboratory analytical report is included in Appendix B.

In light of the groundwater sample results, ECS input the laboratory analytical results of the SG-1, SG-2,
SG-3, and SG-4 samples in to the NCDEQ Risk Calculator. Based on the results of the NCDEQ Risk
Calculator, the concentrations detected in the SG-4 soil gas sample exceed the risk thresholds for Resident
and Non-Residential Worker classifications. The remaining soil gas sample results did not exceed the risk
thresholds. Output from the results of the NCDEQ Risk Calculator are presented in Appendix C.

4.0 CONCLUSIONS

Based on the results of the environmental assessment, ECS concludes the following:

• Concentrations of benzene, heptane, and hexane were detected in the SG-4 soil gas sample
greater than their respective Non-Residential VISLs. Benzene in the SG-1 and SG-2 soil gas
samples and cyclohexane in the SG-4 soil gas sample were detected at concentrations greater
than their respective Residential Groundwater Vapor Intrusion Screening Levels (VISLs).
• Based on the results of the NCDEQ Risk Calculator, the concentrations detected in the SG-4 soil
gas sample exceed the risk thresholds for Resident and Non-Residential Worker classifications.
The remaining soil gas sample results did not exceed the risk thresholds.

Report of Additional Assessment Services
Graham and 6th Site
301 N. Graham St. and 420 W. 6th St.
Charlotte, Mecklenburg County, North Carolina
ECS Project No. 49:13734-B
September 12, 2022

4
5.0 RECOMMENDATIONS

Based on the results of the environmental assessment, ECS recommends the following:

• ECS recommends that a copy of this report be maintained for your records.
• Based upon the results of these sampling activities, the need for a Vapor Intrusion Mitigation
System should be assessed.

6.0 QUALIFICATIONS OF REPORT
The activities and evaluative approaches used in this environmental assessment are consistent with those normally employed in environmental soil and groundwater assessment projects of this type. Our evaluation of site conditions has been based on our understanding of the site project information determined during previous environmental assessments and the data obtained during our field activities. This report was prepared for the express use of Daniel Realty Company, LLC. Use of this report by other individuals or companies implies their acceptance of the General Conditions of Service of the original contract.

DRAFT

FIGURES

FIGURE 1USGS TOPOGRAPHIC MAP
GRAHAM AND 6th STREET SITE301 N GRAHAM ST & 420 W 6th STCHARLOTTE, NORTH CAROLINA
ECS PROJECT NO. 49:13734-B
SOURCE:
USGS 7.5’ TOPOGRAPHIC MAP
CHARLOTTE EAST, NC
2019
SCALE:
AS SHOWN
SITE
LOCATION
FIGURE 2PREVIOUS SAMPLE LOCATIONS MAP
GRAHAM AND 6th STREET SITE301 N GRAHAM ST & 420 W 6th STCHARLOTTE, NORTH CAROLINA
ECS PROJECT NO. 49:13734-B
SOURCE:
MECKLENBURG COUNTY GIS WEBSITE
ACCESSED JULY 6, 2021
SCALE:
AS SHOWN
APPROXIMATE SITE BOUNDARY
LEGEND
APPROXIMATE SOIL SAMPLE LOCATION
APPROXIMATE GROUNDWATER BORING LOCATION
APPROXIMATE
FORMER AST
LOCATION
APPROXIMATE FORMER UNDERGROUND HYDRAULIC LIFT LOCATION
THE VUE (LUST –REC)
FORMER
DRYCLEANERS AND
FORMER GASOLINE
STATION (REC)
FORMER
HOLLAND
HOUSE
(LUST –REC)
FORMER EDEN CLEANERS (REC)FORMER GASOLINE STATION (REC)
FORMER
DRYCLEANER (REC)
APPROXIMATE FORMER HEATING OIL UST LOCATION
GW-1 GW-2
GW-3
GW-4
GW-5
GW-6
GW-7
SS-1/GW-8 SS-2/GW-9
SS-4/GW-10
SS-3
GW-11
SS-5
GPR ANOMALY
FIGURE 3CURRENT SAMPLE LOCATIONS MAP
GRAHAM AND 6th STREET SITE301 N GRAHAM ST & 420 W 6th STCHARLOTTE, NORTH CAROLINA
ECS PROJECT NO. 49:13734-B
SOURCE:
MECKLENBURG COUNTY GIS WEBSITE
ACCESSED JULY 6, 2021
SCALE:
AS SHOWN
APPROXIMATE SITE BOUNDARY
LEGEND
APPROXIMATE SOIL GAS SAMPLE LOCATION
SG-1
SG-2 SG-3
SG-4

DRAFT

TABLES

Table 1
Summary of Exterior Soil Gas Samples Analytical Results
Graham and 6th Street Site
301 North Graham and 420 West 6th Street
Charlotte, Mecklenburg County, North Carolina
ECS Project No.: 49:13734-B
VOCs by EPA Method TO-15
AcetoneBenzene2-Butanone(Methyl ethyl ketone)Carbon DisulfideChloroethaneChloroformChloromethaneCyclohexaneDichlorodifluoromethaneEthanolEthyl acetateEthylbenzene4-EthyltolueneHeptaneHexaneIsopropanolMethyl tert butyl ether4-Methyl-2-pentanone(MIBK)NaphthalenePropeneStyreneTetrachloroetheneTolueneTrichloroetheneTrichlorofluoromethane1,2,4-Trimethylbenzene1,3,5-TrimethylbenzeneVinyl ChlorideTotal XylenesResidential VISL NE 12 35,000 4,900 NE 4.1 630 42,000 700 NE 490 37 NE 2,800 4,900 1,400 360 21,000 2.8 630 7,000 280 35,000 14 NE 420 420 5.6 700
Non-Residential VISL NE 160 440,000 61,000 NE 53 7,900 530,000 8,800 NE 6,100 490 NE 35,000 61,000 18,000 4,700 260,000 36 2,600 88,000 3,500 440,000 180 NE 5,300 5,300 280 8,800
Sample ID
Laboratory
Vaccuum
Reading
(in Hg)
Initial
Sample
Vaccum
Reading
(in Hg)
Final
Sample
Vaccum
Reading
(in Hg)
Sample
Date
SG-1 -30 -28 -5 08/19/22 190 33 17 J 380 1.4 <0.98 5.4 26 1.3 21 <7.2 3.8 0.90 J 8.7 18 J 6.1 J 0.69 J <0.82 1.2 130 2.5 1.2 J 25 <1.1 1.5 J 3.2 1.2 1.5 13.0
SG-2 -30 -28 -5 08/19/22 110 36 12 J 20 <0.53 <0.98 1.3 7.8 1.4 16 8.4 3.0 0.69 J 7.9 9.5 J 5.8 J <0.72 3.0 <1.0 81 2.0 2.7 20 <1.1 3.0 J 2.4 0.77 J <0.51 9.2
SG-3 -30 -28 -5 08/19/22 160 3.3 14 J 3.7 J <0.53 1.2 3.1 6.8 0.99 10 J <7.2 1.7 0.63 J 8.3 12 J 6.1 J 0.92 <0.82 <1.0 23 1.7 <1.4 3.3 <1.1 <4.5 2.6 0.69 J <0.51 6.0
SG-4 -30 -29 -5 08/19/22 <14,000 2,100 <18,000 <4,700 <690 <730 <620 390,000 <740 <11,000 <5,400 <650 <740 240,000 400,000 <15,000 <540 <610 <790 <10,000 <640 <1,000 <570 <810 <3,400 <740 <740 <380 <1,950
Notes:
All results presented in micrograms per cubic meter (mg/m3)
Compounds not shown were not detected
in Hg - inches of mercury
VOCs = Volatile Organic Compounds
Residential VISLs = NCDEQ Residential Exterior Vapor Instrusion Screening Levels (July 2022)
Non-Residential VISLs = NCDEQ Non-Residential Exterior Vapor Instrusion Screening Levels (July 2022)
NE = Not established
VALUE = concentration greater than the laboratory method reporting limit
VALUE = concentration greater than the Residential VISL
VALUE = concentration greater than the Non-Residential VISL

DRAFT

APPENDIX A
Installation and Sampling Forms

Soil Gas Probe Installation and Sampling Form
Graham & 6th Street 49-13734B
301 N. Graham St. Charlotte
Randy Cavallier
Weather:72°/86˚63% humidity 4 mph from SW
Barometric Pressure (in-Hg):29.96˄
SG-1 Date:
Borehole Diameter (inches):Probe Installation Depth (ft bgs):Time Started: Time Ended:Sand Pack Depth: Top (ft bgs):Type:Bentonite Seal Depth:Top (ft bgs):Type:Backfill Depth: Material:Date:Time:1445
Corrective Actions ? (y/n):
Second Shut-In Test Required? (y/n):N
Date:Time:1449
Helium Concentration in Shroud:%:ppm:18,000
Purge Volume (mL):63 3X Puge Volume (mL):189
Total Volume Purged (mL):750 Purge Rate (mL/min):NA
Helium Readings from Sample Train (ppm):0, 0, 0 ppm
Sample Date:8/19/2022 SG-1 1
1450 -28
1455 -5
Analyses:VOCs by EPA Method TO-15
Abbreviations:in-Hg: inches of mercury
%: percent L: Liters
bgs: below ground surface min: minutes
EPA: United States Environmental Protection Agency ppm: parts per million
ft: feet VOCs: volatile organic compounds
Project Number:
Soil Gas Probe Installation Information
Project Name:
Site Address:
ECS Employees:
Sample Location:8/19/22
Sample ID:Summa Canister Size (L):
Sample Start Time:
Leak Detected? (y/n): N Corrective Action Needed? (y/n): N
Helium Shroud
Test:
If further corrective action is needed, document tests on new form.
Soil Gas Sample Collection
8/19/22 304-402001707-1
Sample End Time:
Start Pressure (in-Hg):
End Pressure (in-Hg):
Flow Regulator Number: 4724Summa Canister Number: 2571
Leak Detected? (y/n): N
Shut-In Test:
Leak Detected? (y/n):
Helium Lot Number:
Describe:
8/19/22
Soil Gas Probe Installation and Sampling Form
Graham & 6th Street 49-13734B
301 N. Graham St. Charlotte
Randy Cavallier
Weather:72°/86˚63% humidity 4 mph from SW
Barometric Pressure (in-Hg):29.96˄
SG-2 Date:
Borehole Diameter (inches):Probe Installation Depth (ft bgs):Time Started: Time Ended:Sand Pack Depth: Top (ft bgs):Type:Bentonite Seal Depth:Top (ft bgs):Type:Backfill Depth: Material:Date:Time:1445
Corrective Actions ? (y/n):
Second Shut-In Test Required? (y/n):N
Date:Time:1449
Helium Concentration in Shroud:%:ppm:26,000
Purge Volume (mL):63 3X Puge Volume (mL):189
Total Volume Purged (mL):750 Purge Rate (mL/min):NA
Helium Readings from Sample Train (ppm):25, 0, 0 ppm
Sample Date:8/19/2022 SG-2 1
1520 -28
1524 -5
Analyses:VOCs by EPA Method TO-15
Abbreviations:in-Hg: inches of mercury
%: percent L: Liters
bgs: below ground surface min: minutes
EPA: United States Environmental Protection Agency ppm: parts per million
ft: feet VOCs: volatile organic compounds
Project Number:
Soil Gas Probe Installation Information
Project Name:
Site Address:
ECS Employees:
Sample Location:8/19/22
Sample ID:Summa Canister Size (L):
Sample Start Time:
Leak Detected? (y/n): N Corrective Action Needed? (y/n): N
Helium Shroud
Test:
If further corrective action is needed, document tests on new form.
Soil Gas Sample Collection
8/19/22 304-402001707-1
Sample End Time:
Start Pressure (in-Hg):
End Pressure (in-Hg):
Flow Regulator Number: 4732Summa Canister Number: 2529
Leak Detected? (y/n): N
Shut-In Test:
Leak Detected? (y/n):
Helium Lot Number:
Describe:
8/19/22
Soil Gas Probe Installation and Sampling Form
Graham & 6th Street 49-13734B
301 N. Graham St. Charlotte
Randy Cavallier
Weather:72°/86˚63% humidity 4 mph from SW
Barometric Pressure (in-Hg):29.96˄
SG-3 Date:
Borehole Diameter (inches):Probe Installation Depth (ft bgs):Time Started: Time Ended:Sand Pack Depth: Top (ft bgs):Type:Bentonite Seal Depth:Top (ft bgs):Type:Backfill Depth: Material:Date:Time:1445
Corrective Actions ? (y/n):
Second Shut-In Test Required? (y/n):N
Date:Time:1449
Helium Concentration in Shroud:%:ppm:26,000
Purge Volume (mL):63 3X Puge Volume (mL):189
Total Volume Purged (mL):750 Purge Rate (mL/min):NA
Helium Readings from Sample Train (ppm):25, 0, 0 ppm
Sample Date:8/19/2022 SG-3 1
1550 -28
1554 -5
Analyses:VOCs by EPA Method TO-15
Abbreviations:in-Hg: inches of mercury
%: percent L: Liters
bgs: below ground surface min: minutes
EPA: United States Environmental Protection Agency ppm: parts per million
ft: feet VOCs: volatile organic compounds
Project Number:
Soil Gas Probe Installation Information
Project Name:
Site Address:
ECS Employees:
Sample Location:8/19/22
Sample ID:Summa Canister Size (L):
Sample Start Time:
Leak Detected? (y/n): N Corrective Action Needed? (y/n): N
Helium Shroud
Test:
If further corrective action is needed, document tests on new form.
Soil Gas Sample Collection
8/19/22 304-402001707-1
Sample End Time:
Start Pressure (in-Hg):
End Pressure (in-Hg):
Flow Regulator Number: 4733Summa Canister Number: 2554
Leak Detected? (y/n): N
Shut-In Test:
Leak Detected? (y/n):
Helium Lot Number:
Describe:
8/19/22
Soil Gas Probe Installation and Sampling Form
Graham & 6th Street 49-13734B
301 N. Graham St. Charlotte
Randy Cavallier
Weather:72°/86˚63% humidity 4 mph from SW
Barometric Pressure (in-Hg):29.96˄
SG-4 Date:
Borehole Diameter (inches):Probe Installation Depth (ft bgs):Time Started: Time Ended:Sand Pack Depth: Top (ft bgs):Type:Bentonite Seal Depth:Top (ft bgs):Type:Backfill Depth: Material:Date:Time:1445
Corrective Actions ? (y/n):
Second Shut-In Test Required? (y/n):N
Date:Time:1449
Helium Concentration in Shroud:%:ppm:26,000
Purge Volume (mL):63 3X Puge Volume (mL):189
Total Volume Purged (mL):750 Purge Rate (mL/min):NA
Helium Readings from Sample Train (ppm):25, 0, 0 ppm
Sample Date:8/19/2022 SG-4 1
1620 -29
1625 -5
Analyses:VOCs by EPA Method TO-15
Abbreviations:in-Hg: inches of mercury
%: percent L: Liters
bgs: below ground surface min: minutes
EPA: United States Environmental Protection Agency ppm: parts per million
ft: feet VOCs: volatile organic compounds
Project Number:
Soil Gas Probe Installation Information
Project Name:
Site Address:
ECS Employees:
Sample Location:8/19/22
Sample ID:Summa Canister Size (L):
Sample Start Time:
Leak Detected? (y/n): N Corrective Action Needed? (y/n): N
Helium Shroud
Test:
If further corrective action is needed, document tests on new form.
Soil Gas Sample Collection
8/19/22 304-402001707-1
Sample End Time:
Start Pressure (in-Hg):
End Pressure (in-Hg):
Flow Regulator Number: 4725Summa Canister Number: 2655
Leak Detected? (y/n): N
Shut-In Test:
Leak Detected? (y/n):
Helium Lot Number:
Describe:
8/19/22

DRAFT

APPENDIX B
Laboratory Analytical Report and Chain of Custody Record

39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
August 30, 2022
Scott Young
ECS Southeast - Greensboro, NC
4811 Koger Boulevard
Greensboro, NC 27407
Project Location: 6th & Graham
Client Job Number:
Project Number: [none]
Laboratory Work Order Number: 22H1372
Enclosed are results of analyses for samples as received by the laboratory on August 23, 2022. If you have any questions
concerning this report, please feel free to contact me.
Sincerely,
Kerry K. McGee
Project Manager
QA Officer
Katherine Allen
Laboratory Manager
Daren Damboragian
Page 1 of 24
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ANALYTICAL SUMMARY
8/30/2022ECS Southeast - Greensboro, NC
4811 Koger Boulevard
Greensboro, NC 27407
ATTN: Scott Young
[none]
22H1372
The results of analyses performed on the following samples submitted to Con-Test, a Pace Analytical Laboratory, are found in this report.
PROJECT LOCATION:
PURCHASE ORDER NUMBER:
PROJECT NUMBER:
REPORT DATE:
WORK ORDER NUMBER:
FIELD SAMPLE #LAB ID:MATRIX TESTSAMPLE DESCRIPTION SUB LAB
6th & Graham
SG-1 22H1372-01 Soil Gas -
EPA TO-15
SG-2 22H1372-02 Soil Gas -
EPA TO-15
SG-3 22H1372-03 Soil Gas -
EPA TO-15
SG-4 22H1372-04 Soil Gas -
EPA TO-15
Page 2 of 24
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
CASE NARRATIVE SUMMARY
All reported results are within defined laboratory quality control objectives unless listed below or otherwise qualified in this report.
EPA TO-15
Qualifications:
Laboratory fortified blank/laboratory control sample recovery is outside of control limits. Reported value for this compound is likely to be
biased on the low side.
Analyte & Samples(s) Qualified:
L-03
Hexachlorobutadiene
22H1372-01[SG-1], 22H1372-02[SG-2], 22H1372-03[SG-3], 22H1372-04[SG-4], B316090-BLK1, B316090-BS1
Elevated reporting limit due to high concentration of target compounds.
Analyte & Samples(s) Qualified:
RL-11
22H1372-04[SG-4]
The results of analyses reported only relate to samples submitted to Con-Test, a Pace Analytical Laboratory, for testing.
I certify that the analyses listed above, unless specifically listed as subcontracted, if any, were performed under my direction according to the approved methodologies listed
in this document, and that based upon my inquiry of those individuals immediately responsible for obtaining the information, the material contained in this report is, to the
best of my knowledge and belief, accurate and complete.
Tod E. Kopyscinski
Laboratory Director
Page 3 of 24
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ANALYTICAL RESULTS
Project Location: 6th & Graham
Date Received: 8/23/2022
Work Order: 22H1372Sample Description/Location:
Field Sample #: SG-1
Sample ID: 22H1372-01
Sample Matrix: Soil Gas
Initial Vacuum(in Hg): -28
Final Vacuum(in Hg): -5
Receipt Vacuum(in Hg): -5.6
Sampled: 8/19/2022 14:55
Canister ID: 2572
Flow Controller ID: 4724
Sub Description/Location:
Canister Size: 1 liter
Flow Controller Type: Fixed-Orifice
Flow Controller Calibration
RPD Pre and Post-Sampling:
Sample Type: 5 min
RLResults AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte
Date/Time
EPA TO-15
ppbv ug/m3
MDL MDL
Acetone 81 8.0 8/26/22 14:13 BRF190 4194.8 11
Benzene 10 0.20 8/26/22 14:13 BRF33 40.640.15 0.48
Benzyl chloride ND 0.20 8/26/22 14:13 BRFND41.00.18 0.91
Bromodichloromethane ND 0.20 8/26/22 14:13 BRFND41.30.14 0.94
Bromoform ND 0.20 8/26/22 14:13 BRFND42.10.14 1.4
Bromomethane ND 0.20 8/26/22 14:13 BRFND40.780.13 0.52
1,3-Butadiene ND 0.20 8/26/22 14:13 BRFND40.440.17 0.37
2-Butanone (MEK)5.8 8.0 8/26/22 14:13 BRFJ17 4242.1 6.3
Carbon Disulfide 120 2.0 8/26/22 14:13 BRF380 46.20.18 0.58
Carbon Tetrachloride ND 0.20 8/26/22 14:13 BRFND41.30.16 1.0
Chlorobenzene ND 0.20 8/26/22 14:13 BRFND40.920.13 0.61
Chloroethane 0.51 0.20 8/26/22 14:13 BRF1.4 40.530.18 0.47
Chloroform ND 0.20 8/26/22 14:13 BRFND40.980.19 0.93
Chloromethane 2.6 0.40 8/26/22 14:13 BRF5.4 40.830.16 0.33
Cyclohexane 7.7 0.20 8/26/22 14:13 BRF26 40.690.12 0.42
Dibromochloromethane ND 0.20 8/26/22 14:13 BRFND41.70.13 1.1
1,2-Dibromoethane (EDB)ND 0.20 8/26/22 14:13 BRFND41.50.12 0.93
1,2-Dichlorobenzene ND 0.20 8/26/22 14:13 BRFND41.20.11 0.69
1,3-Dichlorobenzene ND 0.20 8/26/22 14:13 BRFND41.20.11 0.67
1,4-Dichlorobenzene ND 0.20 8/26/22 14:13 BRFND41.20.13 0.79
Dichlorodifluoromethane (Freon 12)0.26 0.20 8/26/22 14:13 BRF1.3 40.990.20 0.97
1,1-Dichloroethane ND 0.20 8/26/22 14:13 BRFND40.810.17 0.71
1,2-Dichloroethane ND 0.20 8/26/22 14:13 BRFND40.810.18 0.73
1,1-Dichloroethylene ND 0.20 8/26/22 14:13 BRFND40.790.15 0.60
cis-1,2-Dichloroethylene ND 0.20 8/26/22 14:13 BRFND40.790.15 0.58
trans-1,2-Dichloroethylene ND 0.20 8/26/22 14:13 BRFND40.790.16 0.62
1,2-Dichloropropane ND 0.20 8/26/22 14:13 BRFND40.920.11 0.50
cis-1,3-Dichloropropene ND 0.20 8/26/22 14:13 BRFND40.910.10 0.47
trans-1,3-Dichloropropene ND 0.20 8/26/22 14:13 BRFND40.910.10 0.46
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114)ND 0.20 8/26/22 14:13 BRFND41.40.20 1.4
1,4-Dioxane ND 2.0 8/26/22 14:13 BRFND47.20.17 0.60
Ethanol 11 8.0 8/26/22 14:13 BRF21 4153.5 6.6
Ethyl Acetate ND 2.0 8/26/22 14:13 BRFND47.21.0 3.6
Ethylbenzene 0.87 0.20 8/26/22 14:13 BRF3.8 40.870.12 0.51
4-Ethyltoluene 0.18 0.20 8/26/22 14:13 BRFJ0.90 40.980.12 0.60
Heptane 2.1 0.20 8/26/22 14:13 BRF8.7 40.820.13 0.52
Hexachlorobutadiene ND 0.20 8/26/22 14:13 BRFL-03 ND 42.10.16 1.8
Hexane 5.1 8.0 8/26/22 14:13 BRFJ18 4281.0 3.7
2-Hexanone (MBK)ND 0.20 8/26/22 14:13 BRFND40.820.10 0.41
Isopropanol 2.5 8.0 8/26/22 14:13 BRFJ6.1 4201.4 3.4
Methyl tert-Butyl Ether (MTBE)0.19 0.20 8/26/22 14:13 BRFJ0.69 40.720.15 0.56
Methylene Chloride ND 2.0 8/26/22 14:13 BRFND46.90.93 3.2
4-Methyl-2-pentanone (MIBK)ND 0.20 8/26/22 14:13 BRFND40.820.11 0.44
Naphthalene 0.22 0.20 8/26/22 14:13 BRF1.2 41.00.15 0.79
Propene 77 8.0 8/26/22 14:13 BRF130 4141.8 3.0
Styrene 0.59 0.20 8/26/22 14:13 BRF2.5 40.850.11 0.45
1,1,2,2-Tetrachloroethane ND 0.20 8/26/22 14:13 BRFND41.40.11 0.74
Page 4 of 24
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ANALYTICAL RESULTS
Project Location: 6th & Graham
Date Received: 8/23/2022
Work Order: 22H1372Sample Description/Location:
Field Sample #: SG-1
Sample ID: 22H1372-01
Sample Matrix: Soil Gas
Initial Vacuum(in Hg): -28
Final Vacuum(in Hg): -5
Receipt Vacuum(in Hg): -5.6
Sampled: 8/19/2022 14:55
Canister ID: 2572
Flow Controller ID: 4724
Sub Description/Location:
Canister Size: 1 liter
Flow Controller Type: Fixed-Orifice
Flow Controller Calibration
RPD Pre and Post-Sampling:
Sample Type: 5 min
RLResults AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte
Date/Time
EPA TO-15
ppbv ug/m3
MDL MDL
Tetrachloroethylene 0.18 0.20 8/26/22 14:13 BRFJ1.2 41.40.15 1.0
Tetrahydrofuran ND 2.0 8/26/22 14:13 BRFND45.90.33 0.97
Toluene 6.6 0.20 8/26/22 14:13 BRF25 40.750.11 0.43
1,2,4-Trichlorobenzene ND 0.20 8/26/22 14:13 BRFND41.50.19 1.4
1,1,1-Trichloroethane ND 0.20 8/26/22 14:13 BRFND41.10.16 0.86
1,1,2-Trichloroethane ND 0.20 8/26/22 14:13 BRFND41.10.14 0.77
Trichloroethylene ND 0.20 8/26/22 14:13 BRFND41.10.13 0.72
Trichlorofluoromethane (Freon 11)0.27 0.80 8/26/22 14:13 BRFJ1.5 44.50.24 1.3
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)ND 0.80 8/26/22 14:13 BRFND46.10.22 1.7
1,2,4-Trimethylbenzene 0.65 0.20 8/26/22 14:13 BRF3.2 40.980.088 0.43
1,3,5-Trimethylbenzene 0.24 0.20 8/26/22 14:13 BRF1.2 40.980.11 0.52
Vinyl Acetate ND 4.0 8/26/22 14:13 BRFND4141.1 3.8
Vinyl Chloride 0.58 0.20 8/26/22 14:13 BRF1.5 40.510.18 0.46
m&p-Xylene 1.9 0.40 8/26/22 14:13 BRF8.3 41.70.22 0.97
o-Xylene 1.1 0.20 8/26/22 14:13 BRF4.7 40.870.10 0.44
Surrogates % Recovery % REC Limits
4-Bromofluorobenzene (1)96.5 8/26/22 14:1370-130
Page 5 of 24
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ANALYTICAL RESULTS
Project Location: 6th & Graham
Date Received: 8/23/2022
Work Order: 22H1372Sample Description/Location:
Field Sample #: SG-2
Sample ID: 22H1372-02
Sample Matrix: Soil Gas
Initial Vacuum(in Hg): -28
Final Vacuum(in Hg): -5
Receipt Vacuum(in Hg): -5.4
Sampled: 8/19/2022 15:24
Canister ID: 2529
Flow Controller ID: 4732
Sub Description/Location:
Canister Size: 1 liter
Flow Controller Type: Fixed-Orifice
Flow Controller Calibration
RPD Pre and Post-Sampling:
Sample Type: 5 min
RLResults AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte
Date/Time
EPA TO-15
ppbv ug/m3
MDL MDL
Acetone 45 8.0 8/26/22 14:54 BRF110 4194.8 11
Benzene 11 0.20 8/26/22 14:54 BRF36 40.640.15 0.48
Benzyl chloride ND 0.20 8/26/22 14:54 BRFND41.00.18 0.91
Bromodichloromethane ND 0.20 8/26/22 14:54 BRFND41.30.14 0.94
Bromoform ND 0.20 8/26/22 14:54 BRFND42.10.14 1.4
Bromomethane ND 0.20 8/26/22 14:54 BRFND40.780.13 0.52
1,3-Butadiene ND 0.20 8/26/22 14:54 BRFND40.440.17 0.37
2-Butanone (MEK)4.1 8.0 8/26/22 14:54 BRFJ12 4242.1 6.3
Carbon Disulfide 6.5 2.0 8/26/22 14:54 BRF20 46.20.18 0.58
Carbon Tetrachloride ND 0.20 8/26/22 14:54 BRFND41.30.16 1.0
Chlorobenzene ND 0.20 8/26/22 14:54 BRFND40.920.13 0.61
Chloroethane ND 0.20 8/26/22 14:54 BRFND40.530.18 0.47
Chloroform ND 0.20 8/26/22 14:54 BRFND40.980.19 0.93
Chloromethane 0.65 0.40 8/26/22 14:54 BRF1.3 40.830.16 0.33
Cyclohexane 2.3 0.20 8/26/22 14:54 BRF7.8 40.690.12 0.42
Dibromochloromethane ND 0.20 8/26/22 14:54 BRFND41.70.13 1.1
1,2-Dibromoethane (EDB)ND 0.20 8/26/22 14:54 BRFND41.50.12 0.93
1,2-Dichlorobenzene ND 0.20 8/26/22 14:54 BRFND41.20.11 0.69
1,3-Dichlorobenzene ND 0.20 8/26/22 14:54 BRFND41.20.11 0.67
1,4-Dichlorobenzene ND 0.20 8/26/22 14:54 BRFND41.20.13 0.79
Dichlorodifluoromethane (Freon 12)0.28 0.20 8/26/22 14:54 BRF1.4 40.990.20 0.97
1,1-Dichloroethane ND 0.20 8/26/22 14:54 BRFND40.810.17 0.71
1,2-Dichloroethane ND 0.20 8/26/22 14:54 BRFND40.810.18 0.73
1,1-Dichloroethylene ND 0.20 8/26/22 14:54 BRFND40.790.15 0.60
cis-1,2-Dichloroethylene ND 0.20 8/26/22 14:54 BRFND40.790.15 0.58
trans-1,2-Dichloroethylene ND 0.20 8/26/22 14:54 BRFND40.790.16 0.62
1,2-Dichloropropane ND 0.20 8/26/22 14:54 BRFND40.920.11 0.50
cis-1,3-Dichloropropene ND 0.20 8/26/22 14:54 BRFND40.910.10 0.47
trans-1,3-Dichloropropene ND 0.20 8/26/22 14:54 BRFND40.910.10 0.46
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114)ND 0.20 8/26/22 14:54 BRFND41.40.20 1.4
1,4-Dioxane ND 2.0 8/26/22 14:54 BRFND47.20.17 0.60
Ethanol 8.3 8.0 8/26/22 14:54 BRF16 4153.5 6.6
Ethyl Acetate 2.3 2.0 8/26/22 14:54 BRF8.4 47.21.0 3.6
Ethylbenzene 0.69 0.20 8/26/22 14:54 BRF3.0 40.870.12 0.51
4-Ethyltoluene 0.14 0.20 8/26/22 14:54 BRFJ0.69 40.980.12 0.60
Heptane 1.9 0.20 8/26/22 14:54 BRF7.9 40.820.13 0.52
Hexachlorobutadiene ND 0.20 8/26/22 14:54 BRFL-03 ND 42.10.16 1.8
Hexane 2.7 8.0 8/26/22 14:54 BRFJ9.5 4281.0 3.7
2-Hexanone (MBK)ND 0.20 8/26/22 14:54 BRFND40.820.10 0.41
Isopropanol 2.3 8.0 8/26/22 14:54 BRFJ5.8 4201.4 3.4
Methyl tert-Butyl Ether (MTBE)ND 0.20 8/26/22 14:54 BRFND40.720.15 0.56
Methylene Chloride ND 2.0 8/26/22 14:54 BRFND46.90.93 3.2
4-Methyl-2-pentanone (MIBK)0.74 0.20 8/26/22 14:54 BRF3.0 40.820.11 0.44
Naphthalene ND 0.20 8/26/22 14:54 BRFND41.00.15 0.79
Propene 47 8.0 8/26/22 14:54 BRF81 4141.8 3.0
Styrene 0.46 0.20 8/26/22 14:54 BRF2.0 40.850.11 0.45
1,1,2,2-Tetrachloroethane ND 0.20 8/26/22 14:54 BRFND41.40.11 0.74
Page 6 of 24
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ANALYTICAL RESULTS
Project Location: 6th & Graham
Date Received: 8/23/2022
Work Order: 22H1372Sample Description/Location:
Field Sample #: SG-2
Sample ID: 22H1372-02
Sample Matrix: Soil Gas
Initial Vacuum(in Hg): -28
Final Vacuum(in Hg): -5
Receipt Vacuum(in Hg): -5.4
Sampled: 8/19/2022 15:24
Canister ID: 2529
Flow Controller ID: 4732
Sub Description/Location:
Canister Size: 1 liter
Flow Controller Type: Fixed-Orifice
Flow Controller Calibration
RPD Pre and Post-Sampling:
Sample Type: 5 min
RLResults AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte
Date/Time
EPA TO-15
ppbv ug/m3
MDL MDL
Tetrachloroethylene 0.40 0.20 8/26/22 14:54 BRF2.7 41.40.15 1.0
Tetrahydrofuran ND 2.0 8/26/22 14:54 BRFND45.90.33 0.97
Toluene 5.2 0.20 8/26/22 14:54 BRF20 40.750.11 0.43
1,2,4-Trichlorobenzene ND 0.20 8/26/22 14:54 BRFND41.50.19 1.4
1,1,1-Trichloroethane ND 0.20 8/26/22 14:54 BRFND41.10.16 0.86
1,1,2-Trichloroethane ND 0.20 8/26/22 14:54 BRFND41.10.14 0.77
Trichloroethylene ND 0.20 8/26/22 14:54 BRFND41.10.13 0.72
Trichlorofluoromethane (Freon 11)0.53 0.80 8/26/22 14:54 BRFJ3.0 44.50.24 1.3
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)ND 0.80 8/26/22 14:54 BRFND46.10.22 1.7
1,2,4-Trimethylbenzene 0.48 0.20 8/26/22 14:54 BRF2.4 40.980.088 0.43
1,3,5-Trimethylbenzene 0.16 0.20 8/26/22 14:54 BRFJ0.77 40.980.11 0.52
Vinyl Acetate ND 4.0 8/26/22 14:54 BRFND4141.1 3.8
Vinyl Chloride ND 0.20 8/26/22 14:54 BRFND40.510.18 0.46
m&p-Xylene 1.4 0.40 8/26/22 14:54 BRF6.2 41.70.22 0.97
o-Xylene 0.70 0.20 8/26/22 14:54 BRF3.0 40.870.10 0.44
Surrogates % Recovery % REC Limits
4-Bromofluorobenzene (1)97.5 8/26/22 14:5470-130
Page 7 of 24
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ANALYTICAL RESULTS
Project Location: 6th & Graham
Date Received: 8/23/2022
Work Order: 22H1372Sample Description/Location:
Field Sample #: SG-3
Sample ID: 22H1372-03
Sample Matrix: Soil Gas
Initial Vacuum(in Hg): -28
Final Vacuum(in Hg): -5
Receipt Vacuum(in Hg): -6.1
Sampled: 8/19/2022 15:54
Canister ID: 2254
Flow Controller ID: 4733
Sub Description/Location:
Canister Size: 1 liter
Flow Controller Type: Fixed-Orifice
Flow Controller Calibration
RPD Pre and Post-Sampling:
Sample Type: 5 min
RLResults AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte
Date/Time
EPA TO-15
ppbv ug/m3
MDL MDL
Acetone 69 8.0 8/26/22 15:34 BRF160 4194.8 11
Benzene 1.0 0.20 8/26/22 15:34 BRF3.3 40.640.15 0.48
Benzyl chloride ND 0.20 8/26/22 15:34 BRFND41.00.18 0.91
Bromodichloromethane ND 0.20 8/26/22 15:34 BRFND41.30.14 0.94
Bromoform ND 0.20 8/26/22 15:34 BRFND42.10.14 1.4
Bromomethane ND 0.20 8/26/22 15:34 BRFND40.780.13 0.52
1,3-Butadiene ND 0.20 8/26/22 15:34 BRFND40.440.17 0.37
2-Butanone (MEK)4.6 8.0 8/26/22 15:34 BRFJ14 4242.1 6.3
Carbon Disulfide 1.2 2.0 8/26/22 15:34 BRFJ3.7 46.20.18 0.58
Carbon Tetrachloride ND 0.20 8/26/22 15:34 BRFND41.30.16 1.0
Chlorobenzene ND 0.20 8/26/22 15:34 BRFND40.920.13 0.61
Chloroethane ND 0.20 8/26/22 15:34 BRFND40.530.18 0.47
Chloroform 0.25 0.20 8/26/22 15:34 BRF1.2 40.980.19 0.93
Chloromethane 1.5 0.40 8/26/22 15:34 BRF3.1 40.830.16 0.33
Cyclohexane 2.0 0.20 8/26/22 15:34 BRF6.8 40.690.12 0.42
Dibromochloromethane ND 0.20 8/26/22 15:34 BRFND41.70.13 1.1
1,2-Dibromoethane (EDB)ND 0.20 8/26/22 15:34 BRFND41.50.12 0.93
1,2-Dichlorobenzene ND 0.20 8/26/22 15:34 BRFND41.20.11 0.69
1,3-Dichlorobenzene ND 0.20 8/26/22 15:34 BRFND41.20.11 0.67
1,4-Dichlorobenzene ND 0.20 8/26/22 15:34 BRFND41.20.13 0.79
Dichlorodifluoromethane (Freon 12)0.20 0.20 8/26/22 15:34 BRF0.99 40.990.20 0.97
1,1-Dichloroethane ND 0.20 8/26/22 15:34 BRFND40.810.17 0.71
1,2-Dichloroethane ND 0.20 8/26/22 15:34 BRFND40.810.18 0.73
1,1-Dichloroethylene ND 0.20 8/26/22 15:34 BRFND40.790.15 0.60
cis-1,2-Dichloroethylene ND 0.20 8/26/22 15:34 BRFND40.790.15 0.58
trans-1,2-Dichloroethylene ND 0.20 8/26/22 15:34 BRFND40.790.16 0.62
1,2-Dichloropropane ND 0.20 8/26/22 15:34 BRFND40.920.11 0.50
cis-1,3-Dichloropropene ND 0.20 8/26/22 15:34 BRFND40.910.10 0.47
trans-1,3-Dichloropropene ND 0.20 8/26/22 15:34 BRFND40.910.10 0.46
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114)ND 0.20 8/26/22 15:34 BRFND41.40.20 1.4
1,4-Dioxane ND 2.0 8/26/22 15:34 BRFND47.20.17 0.60
Ethanol 5.5 8.0 8/26/22 15:34 BRFJ10 4153.5 6.6
Ethyl Acetate ND 2.0 8/26/22 15:34 BRFND47.21.0 3.6
Ethylbenzene 0.40 0.20 8/26/22 15:34 BRF1.7 40.870.12 0.51
4-Ethyltoluene 0.13 0.20 8/26/22 15:34 BRFJ0.63 40.980.12 0.60
Heptane 2.0 0.20 8/26/22 15:34 BRF8.3 40.820.13 0.52
Hexachlorobutadiene ND 0.20 8/26/22 15:34 BRFL-03 ND 42.10.16 1.8
Hexane 3.5 8.0 8/26/22 15:34 BRFJ12 4281.0 3.7
2-Hexanone (MBK)ND 0.20 8/26/22 15:34 BRFND40.820.10 0.41
Isopropanol 2.5 8.0 8/26/22 15:34 BRFJ6.1 4201.4 3.4
Methyl tert-Butyl Ether (MTBE)0.26 0.20 8/26/22 15:34 BRF0.92 40.720.15 0.56
Methylene Chloride ND 2.0 8/26/22 15:34 BRFND46.90.93 3.2
4-Methyl-2-pentanone (MIBK)ND 0.20 8/26/22 15:34 BRFND40.820.11 0.44
Naphthalene ND 0.20 8/26/22 15:34 BRFND41.00.15 0.79
Propene 13 8.0 8/26/22 15:34 BRF23 4141.8 3.0
Styrene 0.40 0.20 8/26/22 15:34 BRF1.7 40.850.11 0.45
1,1,2,2-Tetrachloroethane ND 0.20 8/26/22 15:34 BRFND41.40.11 0.74
Page 8 of 24
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ANALYTICAL RESULTS
Project Location: 6th & Graham
Date Received: 8/23/2022
Work Order: 22H1372Sample Description/Location:
Field Sample #: SG-3
Sample ID: 22H1372-03
Sample Matrix: Soil Gas
Initial Vacuum(in Hg): -28
Final Vacuum(in Hg): -5
Receipt Vacuum(in Hg): -6.1
Sampled: 8/19/2022 15:54
Canister ID: 2254
Flow Controller ID: 4733
Sub Description/Location:
Canister Size: 1 liter
Flow Controller Type: Fixed-Orifice
Flow Controller Calibration
RPD Pre and Post-Sampling:
Sample Type: 5 min
RLResults AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte
Date/Time
EPA TO-15
ppbv ug/m3
MDL MDL
Tetrachloroethylene ND 0.20 8/26/22 15:34 BRFND41.40.15 1.0
Tetrahydrofuran ND 2.0 8/26/22 15:34 BRFND45.90.33 0.97
Toluene 0.87 0.20 8/26/22 15:34 BRF3.3 40.750.11 0.43
1,2,4-Trichlorobenzene ND 0.20 8/26/22 15:34 BRFND41.50.19 1.4
1,1,1-Trichloroethane ND 0.20 8/26/22 15:34 BRFND41.10.16 0.86
1,1,2-Trichloroethane ND 0.20 8/26/22 15:34 BRFND41.10.14 0.77
Trichloroethylene ND 0.20 8/26/22 15:34 BRFND41.10.13 0.72
Trichlorofluoromethane (Freon 11)ND 0.80 8/26/22 15:34 BRFND44.50.24 1.3
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)ND 0.80 8/26/22 15:34 BRFND46.10.22 1.7
1,2,4-Trimethylbenzene 0.54 0.20 8/26/22 15:34 BRF2.6 40.980.088 0.43
1,3,5-Trimethylbenzene 0.14 0.20 8/26/22 15:34 BRFJ0.69 40.980.11 0.52
Vinyl Acetate ND 4.0 8/26/22 15:34 BRFND4141.1 3.8
Vinyl Chloride ND 0.20 8/26/22 15:34 BRFND40.510.18 0.46
m&p-Xylene 0.86 0.40 8/26/22 15:34 BRF3.7 41.70.22 0.97
o-Xylene 0.52 0.20 8/26/22 15:34 BRF2.3 40.870.10 0.44
Surrogates % Recovery % REC Limits
4-Bromofluorobenzene (1)93.4 8/26/22 15:3470-130
Page 9 of 24
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ANALYTICAL RESULTS
Project Location: 6th & Graham
Date Received: 8/23/2022
Work Order: 22H1372Sample Description/Location:
Field Sample #: SG-4
Sample ID: 22H1372-04
Sample Matrix: Soil Gas
Initial Vacuum(in Hg): -29
Final Vacuum(in Hg): -5
Receipt Vacuum(in Hg): -5.3
Sampled: 8/19/2022 16:25
Canister ID: 2655
Flow Controller ID: 4725
Sub Description/Location:
Canister Size: 1 liter
Flow Controller Type: Fixed-Orifice
Flow Controller Calibration
RPD Pre and Post-Sampling:
Sample Type: 5 min
RLResults AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte
Date/Time
EPA TO-15
ppbv ug/m3
Sample Flags: RL-11
MDL MDL
Acetone ND 6000 8/26/22 16:14 BRFND30001400036008600
Benzene 640 150 8/26/22 16:14 BRF2100 3000480110360
Benzyl chloride ND 150 8/26/22 16:14 BRFND3000780130680
Bromodichloromethane ND 150 8/26/22 16:14 BRFND30001000100700
Bromoform ND 150 8/26/22 16:14 BRFND300016001001100
Bromomethane ND 150 8/26/22 16:14 BRFND3000580100390
1,3-Butadiene ND 150 8/26/22 16:14 BRFND3000330130280
2-Butanone (MEK)ND 6000 8/26/22 16:14 BRFND30001800016004700
Carbon Disulfide ND 1500 8/26/22 16:14 BRFND30004700140430
Carbon Tetrachloride ND 150 8/26/22 16:14 BRFND3000940120750
Chlorobenzene ND 150 8/26/22 16:14 BRFND3000690100460
Chloroethane ND 150 8/26/22 16:14 BRFND3000400130350
Chloroform ND 150 8/26/22 16:14 BRFND3000730140700
Chloromethane ND 300 8/26/22 16:14 BRFND3000620120250
Cyclohexane 110000 150 8/26/22 16:14 BRF390000 300052091310
Dibromochloromethane ND 150 8/26/22 16:14 BRFND3000130099850
1,2-Dibromoethane (EDB)ND 150 8/26/22 16:14 BRFND3000120091700
1,2-Dichlorobenzene ND 150 8/26/22 16:14 BRFND300090086520
1,3-Dichlorobenzene ND 150 8/26/22 16:14 BRFND300090083500
1,4-Dichlorobenzene ND 150 8/26/22 16:14 BRFND300090098590
Dichlorodifluoromethane (Freon 12)ND 150 8/26/22 16:14 BRFND3000740150720
1,1-Dichloroethane ND 150 8/26/22 16:14 BRFND3000610130530
1,2-Dichloroethane ND 150 8/26/22 16:14 BRFND3000610140550
1,1-Dichloroethylene ND 150 8/26/22 16:14 BRFND3000590110450
cis-1,2-Dichloroethylene ND 150 8/26/22 16:14 BRFND3000590110430
trans-1,2-Dichloroethylene ND 150 8/26/22 16:14 BRFND3000590120470
1,2-Dichloropropane ND 150 8/26/22 16:14 BRFND300069081380
cis-1,3-Dichloropropene ND 150 8/26/22 16:14 BRFND300068078350
trans-1,3-Dichloropropene ND 150 8/26/22 16:14 BRFND300068077350
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114)ND 150 8/26/22 16:14 BRFND300010001501000
1,4-Dioxane ND 1500 8/26/22 16:14 BRFND30005400120450
Ethanol ND 6000 8/26/22 16:14 BRFND30001100026005000
Ethyl Acetate ND 1500 8/26/22 16:14 BRFND300054007602700
Ethylbenzene ND 150 8/26/22 16:14 BRFND300065088380
4-Ethyltoluene ND 150 8/26/22 16:14 BRFND300074092450
Heptane 57000 150 8/26/22 16:14 BRF240000 300061096390
Hexachlorobutadiene ND 150 8/26/22 16:14 BRFL-03 ND 300016001201300
Hexane 110000 6000 8/26/22 16:14 BRF400000 3000210007802800
2-Hexanone (MBK)ND 150 8/26/22 16:14 BRFND300061075310
Isopropanol ND 6000 8/26/22 16:14 BRFND30001500010002500
Methyl tert-Butyl Ether (MTBE)ND 150 8/26/22 16:14 BRFND3000540120420
Methylene Chloride ND 1500 8/26/22 16:14 BRFND300052007002400
4-Methyl-2-pentanone (MIBK)ND 150 8/26/22 16:14 BRFND300061080330
Naphthalene ND 150 8/26/22 16:14 BRFND3000790110590
Propene ND 6000 8/26/22 16:14 BRFND30001000013002300
Styrene ND 150 8/26/22 16:14 BRFND300064079340
1,1,2,2-Tetrachloroethane ND 150 8/26/22 16:14 BRFND3000100081560
Page 10 of 24
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ANALYTICAL RESULTS
Project Location: 6th & Graham
Date Received: 8/23/2022
Work Order: 22H1372Sample Description/Location:
Field Sample #: SG-4
Sample ID: 22H1372-04
Sample Matrix: Soil Gas
Initial Vacuum(in Hg): -29
Final Vacuum(in Hg): -5
Receipt Vacuum(in Hg): -5.3
Sampled: 8/19/2022 16:25
Canister ID: 2655
Flow Controller ID: 4725
Sub Description/Location:
Canister Size: 1 liter
Flow Controller Type: Fixed-Orifice
Flow Controller Calibration
RPD Pre and Post-Sampling:
Sample Type: 5 min
RLResults AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte
Date/Time
EPA TO-15
ppbv ug/m3
Sample Flags: RL-11
MDL MDL
Tetrachloroethylene ND 150 8/26/22 16:14 BRFND30001000110780
Tetrahydrofuran ND 1500 8/26/22 16:14 BRFND30004400250730
Toluene 220 150 8/26/22 16:14 BRF830 300057086320
1,2,4-Trichlorobenzene ND 150 8/26/22 16:14 BRFND300011001401000
1,1,1-Trichloroethane ND 150 8/26/22 16:14 BRFND3000820120640
1,1,2-Trichloroethane ND 150 8/26/22 16:14 BRFND3000820110580
Trichloroethylene ND 150 8/26/22 16:14 BRFND3000810100540
Trichlorofluoromethane (Freon 11)ND 600 8/26/22 16:14 BRFND300034001801000
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)ND 600 8/26/22 16:14 BRFND300046001701300
1,2,4-Trimethylbenzene ND 150 8/26/22 16:14 BRFND300074066330
1,3,5-Trimethylbenzene ND 150 8/26/22 16:14 BRFND300074079390
Vinyl Acetate ND 3000 8/26/22 16:14 BRFND3000110008102800
Vinyl Chloride ND 150 8/26/22 16:14 BRFND3000380140350
m&p-Xylene ND 300 8/26/22 16:14 BRFND30001300170730
o-Xylene ND 150 8/26/22 16:14 BRFND300065077330
Surrogates % Recovery % REC Limits
4-Bromofluorobenzene (1)96.6 8/26/22 16:1470-130
Page 11 of 24
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
Sample Extraction Data
Prep Method: TO-15 Prep-EPA TO-15
Lab Number [Field ID]Batch Date
Pressure
Dilution
Pre
Dilution
Pre-Dil
Initial
mL
Pre-Dil
Final
mL
Default
Injection
mL
Actual
Injection
mL
22H1372-01 [SG-1]B316090 1.5 1 N/A 1000 400 150 08/26/22
22H1372-02 [SG-2]B316090 1.5 1 N/A 1000 400 150 08/26/22
22H1372-03 [SG-3]B316090 1.5 1 N/A 1000 400 150 08/26/22
22H1372-04 [SG-4]B316090 1.5 200 5 1000 400 40 08/26/22
Page 12 of 24
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ug/m3 Spike Level
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Flag/Qual Analyte
Air Toxics by EPA Compendium Methods - Quality Control
QUALITY CONTROL
RL
ppbv
Results RL Results ppbv
Batch B316090 - TO-15 Prep
Blank (B316090-BLK1)Prepared & Analyzed: 08/26/22
1.4NDAcetone
0.035NDBenzene
0.035NDBenzyl chloride
0.035NDBromodichloromethane
0.035NDBromoform
0.035NDBromomethane
0.035ND1,3-Butadiene
1.4ND2-Butanone (MEK)
0.35NDCarbon Disulfide
0.035NDCarbon Tetrachloride
0.035NDChlorobenzene
0.035NDChloroethane
0.035NDChloroform
0.070NDChloromethane
0.035NDCyclohexane
0.035NDDibromochloromethane
0.035ND1,2-Dibromoethane (EDB)
0.035ND1,2-Dichlorobenzene
0.035ND1,3-Dichlorobenzene
0.035ND1,4-Dichlorobenzene
0.035NDDichlorodifluoromethane (Freon 12)
0.035ND1,1-Dichloroethane
0.035ND1,2-Dichloroethane
0.035ND1,1-Dichloroethylene
0.035NDcis-1,2-Dichloroethylene
0.035NDtrans-1,2-Dichloroethylene
0.035ND1,2-Dichloropropane
0.035NDcis-1,3-Dichloropropene
0.035NDtrans-1,3-Dichloropropene
0.035ND1,2-Dichloro-1,1,2,2-tetrafluoroethane
(Freon 114)
0.35ND1,4-Dioxane
1.4NDEthanol
0.35NDEthyl Acetate
0.035NDEthylbenzene
0.035ND4-Ethyltoluene
0.035NDHeptane
0.035 L-03NDHexachlorobutadiene
1.4NDHexane
0.035ND2-Hexanone (MBK)
1.4NDIsopropanol
0.035NDMethyl tert-Butyl Ether (MTBE)
0.35NDMethylene Chloride
0.035ND4-Methyl-2-pentanone (MIBK)
0.035NDNaphthalene
1.4NDPropene
0.035NDStyrene
Page 13 of 24
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ug/m3 Spike Level
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Flag/Qual Analyte
Air Toxics by EPA Compendium Methods - Quality Control
QUALITY CONTROL
RL
ppbv
Results RL Results ppbv
Batch B316090 - TO-15 Prep
Blank (B316090-BLK1)Prepared & Analyzed: 08/26/22
0.035ND1,1,2,2-Tetrachloroethane
0.035NDTetrachloroethylene
0.35NDTetrahydrofuran
0.035NDToluene
0.035ND1,2,4-Trichlorobenzene
0.035ND1,1,1-Trichloroethane
0.035ND1,1,2-Trichloroethane
0.035NDTrichloroethylene
0.14NDTrichlorofluoromethane (Freon 11)
0.14ND1,1,2-Trichloro-1,2,2-trifluoroethane (Freon
113)
0.035ND1,2,4-Trimethylbenzene
0.035ND1,3,5-Trimethylbenzene
0.70NDVinyl Acetate
0.035NDVinyl Chloride
0.070NDm&p-Xylene
0.035NDo-Xylene
8.00 70-130Surrogate: 4-Bromofluorobenzene (1)92.97.43
LCS (B316090-BS1)Prepared & Analyzed: 08/26/22
5.00 70-13090.34.51Acetone
5.00 70-1301085.38Benzene
5.00 70-1301085.39Benzyl chloride
5.00 70-1301085.38Bromodichloromethane
5.00 70-1301075.36Bromoform
5.00 70-1301085.40Bromomethane
5.00 70-1301035.161,3-Butadiene
5.00 70-13099.54.982-Butanone (MEK)
5.00 70-13093.14.66Carbon Disulfide
5.00 70-1301005.01Carbon Tetrachloride
5.00 70-13098.04.90Chlorobenzene
5.00 70-1301085.40Chloroethane
5.00 70-13084.14.21Chloroform
5.00 70-1301115.53Chloromethane
5.00 70-1301005.02Cyclohexane
5.00 70-1301035.14Dibromochloromethane
5.00 70-1301015.031,2-Dibromoethane (EDB)
5.00 70-13095.24.761,2-Dichlorobenzene
5.00 70-1301015.071,3-Dichlorobenzene
5.00 70-13098.74.941,4-Dichlorobenzene
5.00 70-13088.84.44Dichlorodifluoromethane (Freon 12)
5.00 70-13091.04.551,1-Dichloroethane
5.00 70-13085.64.281,2-Dichloroethane
5.00 70-1301025.121,1-Dichloroethylene
5.00 70-13089.24.46cis-1,2-Dichloroethylene
5.00 70-13091.24.56trans-1,2-Dichloroethylene
5.00 70-1301155.741,2-Dichloropropane
Page 14 of 24
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ug/m3 Spike Level
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Flag/Qual Analyte
Air Toxics by EPA Compendium Methods - Quality Control
QUALITY CONTROL
RL
ppbv
Results RL Results ppbv
Batch B316090 - TO-15 Prep
LCS (B316090-BS1)Prepared & Analyzed: 08/26/22
5.00 70-1301045.22cis-1,3-Dichloropropene
5.00 70-1301075.36trans-1,3-Dichloropropene
5.00 70-13091.94.601,2-Dichloro-1,1,2,2-tetrafluoroethane
(Freon 114)
5.00 70-13093.74.681,4-Dioxane
5.00 70-13081.14.06Ethanol
5.00 70-13093.54.68Ethyl Acetate
5.00 70-1301015.03Ethylbenzene
5.00 70-13099.04.954-Ethyltoluene
5.00 70-1301185.89Heptane
5.00 L-0370-13069.23.46Hexachlorobutadiene *
5.00 70-13095.04.75Hexane
5.00 70-1301175.832-Hexanone (MBK)
5.00 70-13081.24.06Isopropanol
5.00 70-13079.83.99Methyl tert-Butyl Ether (MTBE)
5.00 70-13091.64.58Methylene Chloride
5.00 70-1301256.254-Methyl-2-pentanone (MIBK)
5.00 70-13084.34.22Naphthalene
5.00 70-13092.94.64Propene
5.00 70-1301015.03Styrene
5.00 70-1301115.551,1,2,2-Tetrachloroethane
5.00 70-13087.04.35Tetrachloroethylene
5.00 70-13077.93.90Tetrahydrofuran
5.00 70-1301015.06Toluene
5.00 70-13074.63.731,2,4-Trichlorobenzene
5.00 70-13095.24.761,1,1-Trichloroethane
5.00 70-1301035.161,1,2-Trichloroethane
5.00 70-13099.54.98Trichloroethylene
5.00 70-1301065.30Trichlorofluoromethane (Freon 11)
5.00 70-13082.34.121,1,2-Trichloro-1,2,2-trifluoroethane (Freon
113)
5.00 70-13097.54.881,2,4-Trimethylbenzene
5.00 70-1301015.031,3,5-Trimethylbenzene
5.00 70-13090.14.50Vinyl Acetate
5.00 70-1301035.16Vinyl Chloride
10.0 70-13010110.1m&p-Xylene
5.00 70-1301045.19o-Xylene
8.00 70-130Surrogate: 4-Bromofluorobenzene (1)99.47.96
Page 15 of 24
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
Note: Blank Subtraction is not performed unless otherwise noted
*QC result is outside of established limits.
Wide recovery limits established for difficult compound.
Wide RPD limits established for difficult compound.
#Data exceeded client recommended or regulatory level
RL Reporting Limit
MDL Method Detection Limit
RPD Relative Percent Difference
LCS Laboratory Control Sample
Laboratory Control SampleLCS Dup Duplicate Laboratory Control Sample
MS Matrix Spike Sample
MS Dup Duplicate Matrix Spike Sample
REC Recovery
QC Quality Control
ppbv Parts per billion volume
EPA United States Environmental Protection Agency
Percent Recovery% REC
ND Not Detected
Percent recoveries and relative percent differences (RPDs) are determined by the software using values in the
calculation which have not been rounded.
Not ApplicableN/A
DL Detection Limit
Not CalculatedNC
LFB/LCS Lab Fortified Blank/Lab Control Sample
ORP Oxidation-Reduction Potential
Not dry weight correctedwet
Percent weight% wt
KilogramKg
Gramg
Milligrammg
Microgramg
Nanogramng
LiterL
MillilitermL
Microliter L
Cubic Meterm3
Extractable Petroleum HydrocarbonsEPH
Volatile Petroleum HydrocarbonsVPH
Air Petroleum HydrocarbonsAPH
Flame Ionization DetectorFID
Photo Ionization DetectorPID
FLAG/QUALIFIER SUMMARY
Detected but below the Reporting Limit (lowest calibration standard); therefore, result is an estimated
concentration (CLP J-Flag).
J
Laboratory fortified blank/laboratory control sample recovery is outside of control limits. Reported value for this
compound is likely to be biased on the low side.
L-03
Elevated reporting limit due to high concentration of target compounds.RL-11
ANALYST
Rebecca FaustRLF
Raisa A. PetraitisRAP
PDF Management StationSTATION
Kerry K. McGeeKKM
Brittany R. FiskBRF
Page 16 of 24
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
INTERNAL STANDARD AREA AND RT SUMMARY
EPA TO-15
RTResponseInternal Standard Area %RT DiffResponse
Reference
RT
Reference Area %
Limits
RT Diff
Limit Q
Initial Cal Check (S074615-ICV1 )Lab File ID: G22A210019.D Analyzed: 07/30/22 00:36
Bromochloromethane (1)1239190 8.307 1239190 8.307 60 - 140100 0.0000 +/-0.50
1,4-Difluorobenzene (1)2932256 10.081 2932256 10.081 60 - 140100 0.0000 +/-0.50
Chlorobenzene-d5 (1)2672882 14.452 2672882 14.452 60 - 140100 0.0000 +/-0.50
INTERNAL STANDARD AREA AND RT SUMMARY
EPA TO-15
RTResponseInternal Standard Area %RT DiffResponse
Reference
RT
Reference Area %
Limits
RT Diff
Limit Q
Calibration Check (S075892-CCV1 )Lab File ID: G22A237004.D Analyzed: 08/26/22 09:20
Bromochloromethane (1)1505914 8.307 1505914 8.307 60 - 140100 0.0000 +/-0.50
1,4-Difluorobenzene (1)2779969 10.081 2779969 10.081 60 - 140100 0.0000 +/-0.50
Chlorobenzene-d5 (1)2537763 14.446 2537763 14.446 60 - 140100 0.0000 +/-0.50
LCS (B316090-BS1 )Lab File ID: G22A237005.D Analyzed: 08/26/22 10:01
Bromochloromethane (1)1483610 8.307 1505914 8.307 60 - 14099 0.0000 +/-0.50
1,4-Difluorobenzene (1)2705745 10.081 2779969 10.081 60 - 14097 0.0000 +/-0.50
Chlorobenzene-d5 (1)2474863 14.446 2537763 14.446 60 - 14098 0.0000 +/-0.50
Blank (B316090-BLK1 )Lab File ID: G22A237007.D Analyzed: 08/26/22 11:28
Bromochloromethane (1)1390444 8.313 1505914 8.307 60 - 14092 0.0060 +/-0.50
1,4-Difluorobenzene (1)2476018 10.081 2779969 10.081 60 - 14089 0.0000 +/-0.50
Chlorobenzene-d5 (1)2210526 14.452 2537763 14.446 60 - 14087 0.0060 +/-0.50
SG-1 (22H1372-01 )Lab File ID: G22A237008.D Analyzed: 08/26/22 14:13
Bromochloromethane (1)1499320 8.307 1505914 8.307 60 - 140100 0.0000 +/-0.50
1,4-Difluorobenzene (1)2699272 10.081 2779969 10.081 60 - 14097 0.0000 +/-0.50
Chlorobenzene-d5 (1)2544309 14.446 2537763 14.446 60 - 140100 0.0000 +/-0.50
SG-2 (22H1372-02 )Lab File ID: G22A237009.D Analyzed: 08/26/22 14:54
Bromochloromethane (1)1548834 8.307 1505914 8.307 60 - 140103 0.0000 +/-0.50
1,4-Difluorobenzene (1)2812378 10.081 2779969 10.081 60 - 140101 0.0000 +/-0.50
Chlorobenzene-d5 (1)2635687 14.446 2537763 14.446 60 - 140104 0.0000 +/-0.50
SG-3 (22H1372-03 )Lab File ID: G22A237010.D Analyzed: 08/26/22 15:34
Bromochloromethane (1)1572794 8.307 1505914 8.307 60 - 140104 0.0000 +/-0.50
1,4-Difluorobenzene (1)2825572 10.081 2779969 10.081 60 - 140102 0.0000 +/-0.50
Chlorobenzene-d5 (1)2550584 14.446 2537763 14.446 60 - 140101 0.0000 +/-0.50
SG-4 (22H1372-04 )Lab File ID: G22A237011.D Analyzed: 08/26/22 16:14
Bromochloromethane (1)1636439 8.313 1505914 8.307 60 - 140109 0.0060 +/-0.50
1,4-Difluorobenzene (1)3183378 10.081 2779969 10.081 60 - 140115 0.0000 +/-0.50
Chlorobenzene-d5 (1)3255476 14.452 2537763 14.446 60 - 140128 0.0060 +/-0.50
Page 17 of 24
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
CONTINUING CALIBRATION CHECK
EPA TO-15
S075892-CCV1
COMPOUND TYPE CCV MIN (#)CCV LIMIT (#)CCV ICAL
CONC. (ppbv)% DIFF / DRIFTRESPONSE FACTOR
STD
1.213319A -4.5 304.77 1.2708475.00Acetone
0.9345428A 7.8 305.39 0.86662195.00Benzene
1.116076A 7.7 305.38 1.0362725.00Benzyl chloride
0.693305A 8.1 305.41 0.64114175.00Bromodichloromethane
0.5669245A 8.3 305.42 0.52342195.00Bromoform
0.5412293A 11.6 305.58 0.4851555.00Bromomethane
0.5537283A 9.8 305.49 0.5040795.001,3-Butadiene
1.42379A 0.4 305.02 1.4181885.002-Butanone (MEK)
1.620529A -9.5 304.52 1.7914825.00Carbon Disulfide
0.5097392A 2.5 305.12 0.49731335.00Carbon Tetrachloride
0.795628A 0.03 305.00 0.79541945.00Chlorobenzene
0.3367236A 8.7 305.43 0.30990335.00Chloroethane
1.216772A -14.9 304.26 1.4292475.00Chloroform
0.676079A 15.7 305.78 0.58446715.00Chloromethane
0.3624679A 0.7 305.04 0.35979655.00Cyclohexane
0.5914374A 4.5 305.22 0.56612935.00Dibromochloromethane
0.5868148A 3.1 305.16 0.56903245.001,2-Dibromoethane (EDB)
0.6330823A -3.6 304.82 0.65700675.001,2-Dichlorobenzene
0.7075649A 1.9 305.10 0.69423665.001,3-Dichlorobenzene
0.6899071A -0.3 304.98 0.69222745.001,4-Dichlorobenzene
1.396075A -8.7 304.56 1.5289655.00Dichlorodifluoromethane (Freon 12)
1.123189A -9.0 304.55 1.2346255.001,1-Dichloroethane
0.8091277A -14.1 304.29 0.94242875.001,2-Dichloroethane
1.11354A -0.09 305.00 1.1145815.001,1-Dichloroethylene
0.8234531A -9.5 304.53 0.90947635.00cis-1,2-Dichloroethylene
0.8508852A -8.8 304.56 0.93347655.00trans-1,2-Dichloroethylene
0.3849798A 13.6 305.68 0.33882665.001,2-Dichloropropane
0.5469822A 7.9 305.40 0.50677845.00cis-1,3-Dichloropropene
0.4908849A 7.9 305.40 0.45481725.00trans-1,3-Dichloropropene
1.61426A 2.4 305.12 1.5766275.001,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114)
0.1761792A -6.0 304.70 0.18751595.001,4-Dioxane
0.2596079A 4.7 305.24 0.24788095.00Ethanol
0.1979587A -7.7 304.61 0.21453665.00Ethyl Acetate
1.492789A 3.3 305.17 1.4445685.00Ethylbenzene
1.464349A 2.6 305.13 1.4265675.004-Ethyltoluene
0.3301786A 18.4 305.92 0.27889925.00Heptane
0.390014A -21.9 303.90 0.49962795.00Hexachlorobutadiene
0.84612A -4.7 304.77 0.87430965.00Hexane
Page 18 of 24
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
CONTINUING CALIBRATION CHECK
EPA TO-15
S075892-CCV1
COMPOUND TYPE CCV MIN (#)CCV LIMIT (#)CCV ICAL
CONC. (ppbv)% DIFF / DRIFTRESPONSE FACTOR
STD
0.9650093A 19.8 305.99 0.80535565.002-Hexanone (MBK)
1.433847A 2.1 305.11 1.4042165.00Isopropanol
1.491735A -17.6 304.12 1.8101875.00Methyl tert-Butyl Ether (MTBE)
0.83039A -7.7 304.62 0.89931975.00Methylene Chloride
0.9622881A 29.6 306.48 0.74237715.004-Methyl-2-pentanone (MIBK)
0.894807A -11.2 304.44 1.0071655.00Naphthalene
0.5653284A -2.6 304.87 0.58020455.00Propene
0.8266802A 4.1 305.20 0.79433815.00Styrene
0.9891981A 11.8 305.59 0.88478825.001,1,2,2-Tetrachloroethane
0.4291225A -9.1 304.55 0.47184165.00Tetrachloroethylene
0.2575573A -16.9 304.16 0.30987365.00Tetrahydrofuran
1.161234A 2.0 305.10 1.1384785.00Toluene
0.4063724A -20.7 303.96 0.512725.001,2,4-Trichlorobenzene
0.5654095A 0.6 305.03 0.56223785.001,1,1-Trichloroethane
0.3940838A 3.6 305.18 0.38022255.001,1,2-Trichloroethane
0.3800094A 0.1 305.01 0.37950795.00Trichloroethylene
1.358536A 10.3 305.52 1.2313255.00Trichlorofluoromethane (Freon 11)
1.069006A -15.1 304.24 1.2594145.001,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)
1.170056A -0.1 304.99 1.1715845.001,2,4-Trimethylbenzene
1.223152A 3.7 305.19 1.178995.001,3,5-Trimethylbenzene
1.809566A -4.2 304.79 1.8897935.00Vinyl Acetate
0.7038532A 5.8 305.29 0.6653875.00Vinyl Chloride
1.196411A 4.0 3010.4 1.15087910.0m&p-Xylene
1.217259A 5.7 305.29 1.1513845.00o-Xylene
* Values outside of QC limits
# Column to be used to flag Response Factor and %Diff/Drift values with an asterisk
Page 19 of 24
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
CertificationsAnalyte
CERTIFICATIONS
Certified Analyses included in this Report
EPA TO-15 in Air
AIHA,NY,ME,NHAcetone
AIHA,FL,NJ,NY,ME,NH,VABenzene
AIHA,FL,NJ,NY,ME,NH,VABenzyl chloride
AIHA,NJ,NY,ME,NH,VABromodichloromethane
AIHA,NJ,NY,ME,NH,VABromoform
AIHA,FL,NJ,NY,ME,NHBromomethane
AIHA,NJ,NY,ME,NH,VA1,3-Butadiene
AIHA,FL,NJ,NY,ME,NH,VA2-Butanone (MEK)
AIHA,NJ,NY,ME,NH,VACarbon Disulfide
AIHA,FL,NJ,NY,ME,NH,VACarbon Tetrachloride
AIHA,FL,NJ,NY,ME,NH,VAChlorobenzene
AIHA,FL,NJ,NY,ME,NH,VAChloroethane
AIHA,FL,NJ,NY,ME,NH,VAChloroform
AIHA,FL,NJ,NY,ME,NH,VAChloromethane
AIHA,NJ,NY,ME,NH,VACyclohexane
AIHA,NY,ME,NHDibromochloromethane
AIHA,NJ,NY,ME,NH1,2-Dibromoethane (EDB)
AIHA,FL,NJ,NY,ME,NH,VA1,2-Dichlorobenzene
AIHA,NJ,NY,ME,NH1,3-Dichlorobenzene
AIHA,FL,NJ,NY,ME,NH,VA1,4-Dichlorobenzene
AIHA,NY,ME,NHDichlorodifluoromethane (Freon 12)
AIHA,FL,NJ,NY,ME,NH,VA1,1-Dichloroethane
AIHA,FL,NJ,NY,ME,NH,VA1,2-Dichloroethane
AIHA,FL,NJ,NY,ME,NH,VA1,1-Dichloroethylene
AIHA,FL,NY,ME,NH,VAcis-1,2-Dichloroethylene
AIHA,NJ,NY,ME,NH,VAtrans-1,2-Dichloroethylene
AIHA,FL,NJ,NY,ME,NH,VA1,2-Dichloropropane
AIHA,FL,NJ,NY,ME,NH,VAcis-1,3-Dichloropropene
AIHA,NY,ME,NHtrans-1,3-Dichloropropene
AIHA,NJ,NY,ME,NH,VA1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114)
AIHA,NJ,NY,ME,NH,VA1,4-Dioxane
AIHAEthanol
AIHAEthyl Acetate
AIHA,FL,NJ,NY,ME,NH,VAEthylbenzene
AIHA,NJ4-Ethyltoluene
AIHA,NJ,NY,ME,NH,VAHeptane
AIHA,NJ,NY,ME,NH,VAHexachlorobutadiene
AIHA,FL,NJ,NY,ME,NH,VAHexane
AIHA2-Hexanone (MBK)
AIHA,NY,ME,NHIsopropanol
AIHA,FL,NJ,NY,ME,NH,VAMethyl tert-Butyl Ether (MTBE)
AIHA,FL,NJ,NY,ME,NH,VAMethylene Chloride
AIHA,FL,NJ,NY,ME,NH4-Methyl-2-pentanone (MIBK)
NY,ME,NHNaphthalene
AIHAPropene
AIHA,FL,NJ,NY,ME,NH,VAStyrene
AIHA,FL,NJ,NY,ME,NH,VA1,1,2,2-Tetrachloroethane
Page 20 of 24
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
CertificationsAnalyte
CERTIFICATIONS
Certified Analyses included in this Report
EPA TO-15 in Air
AIHA,FL,NJ,NY,ME,NH,VATetrachloroethylene
AIHATetrahydrofuran
AIHA,FL,NJ,NY,ME,NH,VAToluene
AIHA,NJ,NY,ME,NH,VA1,2,4-Trichlorobenzene
AIHA,FL,NJ,NY,ME,NH,VA1,1,1-Trichloroethane
AIHA,FL,NJ,NY,ME,NH,VA1,1,2-Trichloroethane
AIHA,FL,NJ,NY,ME,NH,VATrichloroethylene
AIHA,NY,ME,NHTrichlorofluoromethane (Freon 11)
AIHA,NJ,NY,ME,NH,VA1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)
AIHA,NJ,NY,ME,NH1,2,4-Trimethylbenzene
AIHA,NJ,NY,ME,NH1,3,5-Trimethylbenzene
AIHA,FL,NJ,NY,ME,NH,VAVinyl Acetate
AIHA,FL,NJ,NY,ME,NH,VAVinyl Chloride
AIHA,FL,NJ,NY,ME,NH,VAm&p-Xylene
AIHA,FL,NJ,NY,ME,NH,VAo-Xylene
Con-Test, a Pace Environmental Laboratory, operates under the following certifications and accreditations:
Code Description Number Expires
100033AIHA-LAP, LLC - ISO 17025:2017AIHA 03/1/2024
M-MA100Massachusetts DEPMA 06/30/2023
PH-0165Connecticut Department of Public HealthCT 12/31/2022
10899 NELAPNew York State Department of HealthNY 04/1/2023
2516 NELAPNew Hampshire Environmental LabNH 02/5/2023
LAO00373Rhode Island Department of HealthRI 12/30/2022
652North Carolina Div. of Water QualityNC 12/31/2022
MA007 NELAPNew Jersey DEPNJ 06/30/2023
E871027 NELAPFlorida Department of HealthFL 06/30/2023
LL720741Vermont Department of Health Lead LaboratoryVT 07/30/2023
VT-255716Vermont Department of Health Drinking WaterVT-DW 06/12/2023
MA00100State of MaineME 06/9/2023
460217Commonwealth of VirginiaVA 12/14/2022
2557 NELAPNew Hampshire Environmental LabNH-P 09/6/2022
25703North Carolina Department of Health and Human ServicesNC-DW 07/31/2023
68-05812Commonwealth of Pennsylvania DEPPA 06/30/2023
9100Dept. of Env, Great Lakes, and EnergyMI 09/6/2022
Page 21 of 24
Page 22 of 24
Page 23 of 24
Page 24 of 24

DRAFT

APPENDIX C
NCDEQ Risk Calculator Output

Risk for Individual Pathways Output Form 1A
Version Date: July 2022
Basis: May 2022 EPA RSL Table
Site ID: Graham and 6th Site
Exposure Unit ID: SG-1
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use*NC NC NC
Soil NC NC NC
Groundwater Use*NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water*NC NC NC
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 3.6E-06 7.2E-02 NO
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 2.6E-07 5.7E-03 NO
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not calculated
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: July 2022
Basis: May 2022 EPA RSL Table
Site ID: Graham and 6th Site
Exposure Unit ID: SG-2
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use*NC NC NC
Soil NC NC NC
Groundwater Use*NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water*NC NC NC
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 3.1E-06 4.9E-02 NO
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 2.4E-07 3.9E-03 NO
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not calculated
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: July 2022
Basis: May 2022 EPA RSL Table
Site ID: Graham and 6th Site
Exposure Unit ID: SG-3
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use*NC NC NC
Soil NC NC NC
Groundwater Use*NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water*NC NC NC
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 6.2E-07 1.1E-02 NO
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 4.7E-08 8.8E-04 NO
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not calculated
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: July 2022
Basis: May 2022 EPA RSL Table
Site ID: Graham and 6th Site
Exposure Unit ID: SG-4
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use*NC NC NC
Soil NC NC NC
Groundwater Use*NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water*NC NC NC
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 1.8E-04 3.8E+01 YES
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 1.3E-05 3.0E+00 YES
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not calculated
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
North Carolina DEQ Risk Calculator