23012_Northgate Mall_VIR_20200506

SOIL GAS ASSESSMENT REPORT
NORTHGATE MALL
1058 WEST CLUB BOULEVARD
DURHAM, DURHAM COUNTY, NORTH CAROLINA 27701
BROWNFIELDS PROJECT NO.: 23012-19-032
MID -ATLANTIC PE LICENSE: F-0967
MID -ATLANTIC JOB NO.: R3153.00
Prepared For:
NW Northgate Holdings, LLC
c/o Kyle Whitaker
3015 Carrington Mill Boulevard
Suite 460
Morrisville, North Carolina 27560
Prepared By -
Mid -Atlantic Associates, Inc.
409 Rogers View Court
Raleigh, North Carolina 27610
Mid -Atlantic Job No. OOOR3155.00
May 6, 2020
�� Atlantic

L'7
Mid Atlantic
Engineering R Environmental Solutions
409 Rogers View Court
Raleigh, NC 27610
office 919.250 99 18
facsimile 919.2509950
MAAONLINE,COM
SOIL GAS ASSESSMENT REPORT
NORTHGATE MALL
1058 WEST CLUB BOULEVARD
DURHAM, DURHAM COUNTY, NORTH CAROLINA 27701
BROWNFIELDS PROJECT NO.: 23012-19-032
MID -ATLANTIC PE LICENSE: F-0967
May 6, 2020
Mid -Atlantic Job No. OOOR3153.00
Prepared For:
NW Northgate Holdings, LLC
c/o Kyle Whitaker
3015 Carrington Mill Boulevard
Suite 460
Morrisville, North Carolina 27560
Prepared By:
MID -ATLANTIC ASSOCIATES, INC.
Reina D. Clark
Project Manager
IvARoi �®
9
® SEAL
G d
D ie Niel PE'
Principal�fe'E;
Mid Atlantic

TABLE OF CONTENTS
1.0 GENERAL INFORMATION...................................................................................1
2.0 SUMMARY OF FIELD ACTIVITIES....................................................................... 2
2.1 Soil Gas Sample Collection.......................................................................... 2
2.1.1 Vapor Pin Installation Procedures................................................................ 3
2.1.2 Helium Leak Check Procedures................................................................... 3
2.1.3 Sample Collection Procedures.....................................................................4
3.0 LABORATORY ANALYTICAL RESULTS............................................................ 4
3.1 Risk Evaluation Methodology....................................................................... 4
3.2 Prime Cleaners Sampling Results................................................................5
3.3 Northgate Auto Center Sampling Results ..................................................... 5
4.0 SUMMARY, CONCLUSIONS, AND RECOMMENDATIONS ................................ 6
DRAWINGS
Drawing 1.1
Topographic Site Map
Drawing 1.2
Parcel Map
Drawing 1.3
AOC Location Map
Drawing 2.1
Prime Cleaners Soil Gas Sample Locations
Drawing 2.2
Northgate Auto Center Soil Gas Sample Locations
IFG1149
Table 3.1 Summary of Chemical Constituents in Soil Gas and Risk Calculations
APPENDICES
Appendix A Laboratory Analytical Report and Chain of Custody Record
Appendix B DEQ Risk Summary Sheets
�� Atlantic

1.0 GENERAL INFORMATION
The subject site consists of 11 parcels making up the Northgate Mall Shopping Center
totaling approximately 57.56-acres and located at 1058 West Club Boulevard in Durham,
Durham County, North Carolina (Drawings 1.1 and 1.2). The site consists of several
commercial structures including the Northgate Mall, Northgate Auto Center, former Sears
Auto Center, Bank of America, and Shops at Northgate as well as paved parking areas,
landscaped areas, and two stormwater retention ponds located on the northwest portion of
the site. An underground drainage feature connects the stormwater retention ponds to an
unnamed tributary south of the site, across Guess Road. The subject site is assigned the
following Parcel ID Numbers by the Durham County Tax Office:
Map Notation
Parcel ID
Address
Acreage
A
0822-11-56-8833
1424 Berkeley Street
2.19
B
0822-11-56-5462
1404 Berkeley Street
7.498
C
0822-11-56-9290
1620 Guess Road
11.846
D
0822-11-65-0547
1602 Guess Road
0.408
E
0822-11-65-0669
1700 Guess Road
0.032
F
0822-11-65-2285
1146 West Club
Boulevard
1.972
G
0822-11-65-2535
1552 Guess Road
2.246
H
0822-11-65-3115
1130 West Club
Boulevard
0.42
1
0822-11-65-5148
1056 West Club
Boulevard
0.511
J
0822-11-75-
0319100
1515 North Gregson
Street
0.572
K
0822-11-66-7081
1531 North Gregson
Street
29.86
As part of the purchase and re -purposing of the site, NW Northgate Holdings, LLC intends
to obtain a Brownfields Agreement (BFA) under the North Carolina Brownfields Program
(NCBP). NW Northgate Holdings, LLC contracted with Mid -Atlantic Associates, Inc. (Mid -
Atlantic) to perform additional assessment at the subject site to address environmental
data gaps as it pertains to the site.
A review of historical documentation included in a previous Phase I Environmental Site
Assessment as well as files maintained by the North Carolina Department of
Environmental Quality (NCDEQ) identified eight areas of concern (AOCs) at the subject
site (Drawing 1.3). During the development of the Assessment Work Plan designed to
address data gaps at the site, dated February 7, 2020, Mid -Atlantic reviewed and
summarized the historical reports referenced above (salient portions included as
Attachment A to the Assessment Work Plan). Review of the available data indicated that
Mid Atlantic

Soil Gas Assessment Report May 6, 2020
Northgate Mall Page 2
Durham, North Carolina
six of the eight ADCs had been adequately assessed. As such, Mid -Atlantic designed a
scope of work to assess soil gas quality in proximity to the chlorinated solvent release
documented at the Prime Cleaners location at the southwest portion of Parcel B and soil
gas quality beneath the Northgate Auto Center facility located on Parcel H, in the southern
portion of the site. Assessment of Parcel H is intended to evaluate soil gas quality as it
pertains to groundwater impacts associated with onsite LUST Incident 15968 as well as
the offsite migration of the south adjacent solvent release from the former One Hour
Martinizing (DC320013).
The Assessment Workplan was approved by the NCBP on March 6, 2020 with the caveat
that proposed sub -slab soil gas samples SGS-1 and SGS-3 were relocated per the NCBP
Project Manager's request. As allowed by indoor conditions, Mid -Atlantic repositioned
these sample locations as requested. The remainder of this report summarizes sub -slab
soil gas sampling at the subject site on April 13, 2020 in accordance with the approved
Assessment Workplan.
The opinions included herein are based on our experience and the information obtained
during the study. This report is based on limited observations made on the dates noted
using the procedures described herein. If additional information becomes available, we
request the opportunity to review the information, reassess the potential environmental
concerns and modify our conclusions and recommendations, if appropriate.
2.0 SUMMARY OF FIELD ACTIVITIES
On April 13, 2020, Mid -Atlantic installed and sampled five exterior soil gas points (SGS-
1 through SGS-5) at the Northgate Mall. Soil gas samples SGS-1 through SGS-3 were
installed on the southwest portion of Parcel B to assess soil gas quality as it pertains to
the Prime Cleaners solvent release (exposure unit 1). Soil gas samples SGS-4 and
SGS-5 were installed beneath the Northgate Auto Center facility on Parcel H (exposure
unit 2).
2.1 Soil Gas Sample Collection
Sub slab soil gas samples SGS-1 through SGS-3 were collected from three tenant
spaces beneath the structure located on Parcel B to assess soil gas quality as it
pertains to the documented solvent release from the historical operation of Prime
Cleaners. The structure is an 87,448 square foot commercial building subdivided into
multiple suites and leased to various commercial tenants. Soil gas samples SGS-1 and
Duplicate were collected from suite #10, currently occupied by Prime Cleaners (Drawing
2.1). The sample was collected from the northeastern portion of the space,
approximately 10 feet from the rear door. Soil gas sample SGS-2 was collected from
Mid Atlantic

Soil Gas Assessment Report May 6, 2020
Northgate Mall Page 3
Durham, North Carolina
suite #25, currently vacant, southeast of Prime Cleaners. Soil gas sample SGS-3 was
collected from suite #68, a vacant warehouse space, east of Prime Cleaners.
Sub slab soil gas samples SGS-4 and SGS-5 were collected beneath the Northgate
Auto Center structure located on Parcel H (Drawing 2.2). Soil gas sample SGS-5 was
collected approximately two feet west of the business lobby space. The original
proposed sample location SGS-5 was to be collected in the lobby area of the business.
However, the business owner recently renovated the floor surface within the lobby and
requested Mid -Atlantic not drill through the new flooring to install the vapor pin. As such,
Mid -Atlantic relocated sample point SGS-5 approximately 26 feet west of the eastern
exterior wall.
Samples were collected in general accordance with the Division of Waste Management
(DWM) Vapor Intrusion Guidance dated March 2018. Samples were collected on April
13, 2020 using 1-liter stainless steel Summa canisters at a maximum flow rate of 10
ml/min.
2.1.1 Vapor Pin Installation Procedures
Sub -slab borings were advanced to support the installation of a vapor pin and collection of
sub -slab soil gas samples. To create the sub -slab sampling port, a rotary -impact drill
equipped with a decontaminated spline drill bit was utilized to drill a 5/8-inch diameter hole
through the concrete slab. The concrete slabs ranged from approximately five to ten
inches thick. Upon completion, a vapor sampling probe was established within each boring
using a new "Vapor Pin TM" which utilizes a brass barb fitting with a silicone sleeve to
create a seal with the concrete when inserted using an installation/extraction tool. The
vapor pins were then fitted with '/4-inch outer diameter Teflon -lined rigid -wall tubing to
complete the vapor sampling probe assembly.
2.1.2 Helium Leak Check Procedures
Upon completion of sample point construction activities, each point was purged, and a
leak checked was performed using a plastic shroud, helium gas and a portable helium
gas detector. A plastic shroud was placed over the entire sampling train of each soil gas
sampling location. Helium was released into the shroud via tubing from the cylinder into
the shroud, and a grab sample was collected by filling a Tedlar bag using the exhaust port
of the purge syringe. Helium monitoring indicated that there were no leaks detected in the
sampling apparatus.
Mid Atlantic

Soil Gas Assessment Report
Northgate Mall
Durham, North Carolina
2.1.3 Sample Collection Procedures
May 6, 2020
Page 4
After performing the helium leak check at each of the interior sub -slab soil gas sample
locations, five primary samples and one duplicate sample were collected using 1-liter
stainless steel canisters at a maximum flow rate of 100 ml/min. Upon collection, the soil
gas samples were shipped to Con -Test Analytical Laboratories in East Longmeadow,
Massachusetts under proper chain of custody for analysis. The canisters were analyzed
in the laboratory for VOCs according to EPA Method TO-15.
3.0 LABORATORY ANALYTICAL RESULTS AND RISK EVALUATION
The laboratory analytical report and chains -of -custody record for the soil gas samples
collected in April 2020 are provided in Appendix A and summarized in Table 3.1. The soil
gas analytical results were used to calculate the potential exposure risk of future site
occupants for both a residential and non-residential use scenario. Potential risk was
calculated using the NCDEQ Risk Calculator (December 2019).
3.1 Risk Evaluation Methodology
The cumulative risk is calculated by entering the maximum concentrations of all
contaminants detected at each established AOC into the DEQ Risk Calculator. The
subject site is separated in to two exposure units (EUs): Prime Cleaners and Northgate
Auto Center. Information regarding the specific EUs is described in the table below:
EU
Samples
Prime Cleaners
SGS-1 through SGS-3 and Duplicate
Northgate Auto Center
SGS-4 and SGS-5
The DEQ Risk Calculator determines the cancer risk sum for all carcinogens and the
cumulative hazard index for all non -carcinogens. The DWM allows a maximum cancer risk
sum for all carcinogens of 1.0E-04 and a maximum cumulative hazard index (HI) of 1.0 for
all non -carcinogens in soil gas. The HI is the sum of the hazard quotient (HQs) calculated
for each compound detected above the reporting limit.' The NCDEQ risk calculations for
the subject site are included in Appendix B. The results of the risk evaluations are
summarized in Table 3.1 and discussed below.
Division of Waste Management (DWM) Vapor Intrusion Screening Levels Guidance Document.
April 2014. Page 1.
ft Mid Atlantic

Soil Gas Assessment Report
Northgate Mall
Durham, North Carolina
3.2 Prime Cleaners Sampling Results
May 6, 2020
Page 5
As summarized in Table 3.1, several compounds were detected in soil gas samples SGS-
1 through SGS-3 and Duplicate at concentrations exceeding the laboratory method
detection limits. Tetrachloroethylene (750 micrograms per meter cubed [pg/m3]) and
trichloroethylene (120 pg/m3) were detected in soil gas samples SGS-1 and Duplicate at
concentrations exceeding their respective Residential Vapor Intrusion Screening Levels
(VISLs). No other compounds were detected in the Prime Cleaners soil gas samples at
concentrations exceeding Residential VISLs. Further, no compounds were detected in
these samples at concentrations exceeding the Non -Residential VISLs.
The highest concentration of each compound detected in each of the sample locations
were input into the DEQ Risk Calculator to evaluate potential risk. As summarized in Table
3.1, the calculated residential cancer risk did not exceed the target cancer risk of 1.0E-04.
However, the residential non -cancer risk HI was calculated to be 2.4, exceeding the
acceptable HI of 1.0. Calculated risk of soil gas concentrations for a non-residential use
scenario did not exceed the target cancer risk of 1.0E-4 nor the non -cancer risk HI of 1.0
Mid -Atlantic also performed cumulative risk calculations for each individual sample point.
The risk calculation completed for sample SGS-1 and its duplicate indicate a residential
non -cancer risk HI of 2.3, exceeding the acceptable HI of 1.0. According to the risk
calculator, risk exceedance at this location appears to be influenced by the concentrations
of tetrachloroethylene and trichloroethylene detected in primary soil gas sample SGS-1.
Risk calculations conducted for soil gas samples SGS-2 and SGS-3 indicated a residential
non -cancer risk HI of 8.8E-2 and 8.6E-3, respectively. As such, it appears that the
residential risk exceedance for this EU is primarily influenced by the soil gas quality
beneath suite #10 occupied by Prime Cleaners.
3.3 Northgate Auto Center Sampling Results
As summarized in Table 3.1, several compounds were detected in soil gas samples SGS-
4 and SGS-5 at concentrations exceeding the laboratory method detection limits but below
their respective Residential and Non -Residential VISLs. The highest concentration of each
compound detected in each of the sample locations were input into the DEQ Risk
Calculator to evaluate potential risk. As summarized in Table 3.1, the calculated risk of soil
gas concentrations for a residential use scenario did not exceed the target cancer risk of
1.0E-4 nor the non -cancer risk HI of 1.0. Calculated risk of soil gas concentrations for a
non-residential use scenario did not exceed the target cancer risk of 1.0E-4 nor the non -
cancer risk HI of 1.0
Mid Atlantic

Soil Gas Assessment Report May 6, 2020
Northgate Mall Page 6
Durham, North Carolina
4.0 SUMMARY, CONCLUSIONS, AND RECOMMENDATIONS
The April 2020 Soil Gas Assessment activities are summarized as follows:
• Three primary sub -slab soil gas samples (SGS-1 through SGS-3) and one
duplicate sample (Duplicate) were collected beneath the southwest portion of the
structure located on Parcel B to assess soil gas quality in proximity to the
chlorinated solvent release documented at the Prime Cleaners;
• Tetrachloroethylene and trichloroethylene were detected in soil gas samples
SGS-1 and Duplicate at concentrations exceeding their respective Residential
VISLs but below their respective Non -Residential VISLs;
• Calculated residential cancer risk for the Prime Cleaners soil gas samples did not
exceed the target cancer risk of 1.0E-04. However, the residential non -cancer risk
HI was calculated to be 2.4, exceeding the acceptable HI of 1.0;
• Calculated risk of the Prime Cleaners soil gas concentrations for a non-residential
use scenario did not exceed the target cancer risk of 1.0E-4 nor the non -cancer risk
HI of 1.0;
• The risk calculation completed for sample SGS-1 and its duplicate indicate a
residential non -cancer risk HI of 2.3, exceeding the acceptable HI of 1.0. As such, it
appears that the Prime Cleaners EU residential risk exceedance is primarily
influenced by the soil gas quality beneath suite #10 occupied by Prime Cleaners;
• Two sub -slab soil gas samples (SGS-4 and SGS-5) were collected beneath the
Northgate Auto Center facility located on Parcel H to evaluate soil gas quality as it
pertains to groundwater impacts associated with onsite LUST Incident 15968 as
well as the offsite migration of the adjacent solvent release from the former One
Hour Martinizing (DC320013); and
• The calculated risk of the Northgate Auto Center soil gas concentrations for a
residential use scenario did not exceed the target cancer risk of 1.0E-4 nor the non -
cancer risk HI of 1.0. Calculated risk of soil gas concentrations for a non-residential
use scenario did not exceed the target cancer risk of 1.0E-4 nor the non -cancer risk
HI of 1.0
The overall objective of this investigation was to evaluate the conditions (with respect to
vapor intrusion) at the site to help facilitate future development at the Northgate Mall.
The data collected during this investigation was used to determine if potential
unacceptable health risks are present at the subject site. Based on the data collected
our conclusions are:
• It appears that current site conditions may be presenting an unacceptable exposure
risk for a residential exposure scenario but not creating unacceptable exposure risk
ft Mid Atlantic

Soil Gas Assessment Report
Northgate Mall
Durham, North Carolina
May 6, 2020
Page 7
for a non-residential exposure scenario for the portion of the site occupied by Prime
Cleaners;
• Analytical data indicates that site conditions at the Northgate Auto Center are not
creating unacceptable exposure risk for a residential or non-residential exposure
scenario; and
• The data presented in this assessment coupled with the historical data collected
at the subject site (described in the Work Plan) indicate that additional
assessment is not warranted at this time. As redevelopment plans progress, the
intended future use of the site in proximity to the eight ADCs will need to be
evaluated to determine if supplemental assessment is warranted based on the
identified future use. Environmental conditions are currently understood
sufficiently to initiate the development of a draft Brownfield Agreement for this
site.
Based on these conclusions, Mid -Atlantic recommends the following:
• If redevelopment of Parcel B includes residential use in the area of the current
Prime Cleaners facility, further assessment of a potential vapor intrusion condition
at this location may be necessary to determine if a Vapor Intrusion Mitigation
System (VIMS) will be required at this location;
• A VMIS does not appear to be required for the redevelopment of Parcel H;
• Mid -Atlantic recommends submittal of this report to the North Carolina
Brownfields Program.
Mid Atlantic

DRAWINGS
Mid Atlantic

a
REFERENCES:
1. SOUTHWEST DURHAM, NC & NORTHWEST DURHAM, NC DIGITAL RASTER GRAPHIC, USGS. SCALE: 1:12, 000
SCANNED FROM 1:24,000-SCALE SOUTHWEST DURHAM, NC & NORTHWEST DURHAM, NC
TOPOGRAPHIC MAPS, PUBLISHED 2013, USGS.
2. INSET MAP DIGITAL DATA FROM 2002 NATIONAL TRANSPORTATION ATLAS, Feet
BUREAU OF TRANSPORTATION STATISTICS, WASHINGTON, D.C.
3. PROPERTY BOUNDARY DATA FROM DURHAM COUNTY GIS. Q 500 1,000 2,000
DRAWN DATE:
BY: RDC APRIL 2020
TOPOGRAPHIC SITE MAP DRAFT JOB NO:
Mid AtlandC NORTHGATE MALL CHECK: 00OR3153.00
Engineering & Environmenul Solutions DURHAM, NORTH CAROLINA ENG. GIS NO:
CHECK: 06G-R3153.00-1
APPROVAL: DWG NO: 1.1

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LEGEND
SUBJECT SITE
PARCEL BOUNDARY
FORMER MACY'S - NOT INCLUDED IN BFP
REFERENCES:
1. PROPERTY LINE AND ROAD DATA FROM DURHAM CO. GIs.
2.2017 AERIAL IMAGERY FROM NC ONEMAP.
3. MID -ATLANTIC FIELD NOTES.
90, � � _. I
Mid Atlantic
Engineering & Environmental Solutions
L'
PARCEL MAP
NORTHGATE MALL
DURHAM, NORTH CAROLINA
1qI I ff
rLJ I "*"" i
1 inch equals 250 feet
0 250 500
Feet
DRAWN DATE:
BY: RDC APRIL 2020
DRAFT JOB NO:
CHECK: OOOR3153.00
ENG. GIS NO:
CHECK: 06G-R3153.00-A
APPROVAL: DWG NO: 1.2

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LEGEND
SUBJECT SITE
PARCEL BOUNDARY
FORMER MACY'S - NOT INCLUDED IN BFP
REFERENCES:
1. PROPERTY LINE AND ROAD DATA FROM DURHAM CO. GIs.
2.2017 AERIAL IMAGERY FROM NC ONEMAP.
3. MID -ATLANTIC FIELD NOTES.
90, � � _. I
Mid Atlantic
Engineering & Environmental Solutions
ONE HOUF
MARTINIZIN
AOC LOCATION MAP
NORTHGATE MALL
DURHAM, NORTH CAROLINA
1 inch equals 250 feet
0 250 500
Feet
DRAWN DATE:
BY: RDC APRIL 2020
DRAFT JOB NO:
CHECK: OOOR3153.00
ENG. GIS NO:
CHECK: 06G-R3153.00-B
APPROVAL: DWG NO: 1.3

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LEGEND
C SOIL GAS SAMPLE LOCATION \�
SUBJECT SITE
PARCEL BOUNDARY
REFERENCES:
1. PROPERTY LINE AND ROAD DATA FROM DURHAM CO. GIs.
2. MID -ATLANTIC FIELD NOTES.
3.2017 AERIAL IMAGERY FROM NC ONEMAP.
Mid Atlantic
PRIME CLEANERS
SOIL GAS SAMPLE LOCATIONS
NORTHGATE MALL
DURHAM, NORTH CAROLINA
if
r
�I
1 inch equals 50 feet
0 50 100
Feet
DRAWN
DATE:
BY: GCH
APRIL 2020
DRAFT
JOB NO:
CHECK:
OOOR3153.00
ENG.
GIS NO:
CHECK:
06G-R3153.00-C
APPROVAL:
DWG NO. 2.1

REFERENCES:
1. PROPERTY LINE AND ROAD DATA FROM DURHAM CO. GIs.
2.2017 AERIAL IMAGERY FROM NC ONEMAP.
3. MID -ATLANTIC FIELD NOTES.
0 Mid Atlantic
NORTHGATE AUTO CENTER
SOIL GAS SAMPLE LOCATIONS
NORTHGATE MALL
DURHAM, NORTH CAROLINA
1 inch equals 25 feet
0 25 50
Feet
DRAWN
BY: GCH
DRAFT
CHECK:
ENG.
CHECK:
APPROVAL:
DATE:
APRIL 2020
JOB NO:
OOOR3153.00
GIS NO:
06G-R3153.00-D
DWG NO. 2.2

TABLE
Mid Atlantic

TABLE 3.1
SUMMARY OF CHEMICAL CONSTITUENTS IN SOIL GAS SAMPLES
AND RISK CALCULATIONS
NORTHGATE MALL
DURHAM, NORTH CAROLINA
MID -ATLANTIC JOB NO.: R3153.00
Pa er-
SAMPLING LOCATION
Residential Vapor
Intrusion Screening
Levels
Non -Residential Vapor
Intrusion Screening
Levels
Duplicate
SGS-1
SGS-2
SGS-3E4/13/202010:20
SGS-S
Prime Cleaners Sub -Slab Soil Gas Samples
Slab Soil Gas Samples
Residential Soil -Gas
ug/m3
Non -Residential SDil-Ga
ug/m3
Sampling Data
4/13/20204:01 PM
4/13/20203:45 PM
4/13/20201:40 PM
4/13/20202:39 PM
4/13/202011:51 AM
Sample Depth
Sub -Slab
Sub -Slab
Sub -Slab
Sub -Slab
Sub -Slab
EPA TO.15
Acetone
190
250
120
51
13M
540
220000
27000M
Benzene
0.77
0.87
0.64
0.70
NO(0.26)
0.41)
120
1600
Benzyl Chloride
NO (0.27)
NO (0.27)
NO (0.27)
NO (0.27)
NO (0.27)
NO (0.27)
7
88
Bromodichloromethane
NO(0.49)
NO(0.49)
NO(0.49)
NO(0.49)
NO(0.49)
NO(0.49)
25
330
Bromoform
NO (0.93)
NO (0.93)
NO (0.93)
NO (0.93)
NO (0.93)
NO (0.93)
850
11000
Bromomethane
NO (0.53)
NO (0.53)
NO (0.53)
NO (0.53)
NO (0.53)
NO (0.53)
35
440
1,3-Butadiene
NO (0.32)
NO (0.32)
NO (0.32)
NO (0.32)
NO (0.32)
NO (0.32)
14
180
2-Butanone(MEK)
5.5J
4.7)
7.7J
4.7)
84
14)
35000
440000
Carbon Disulfide
NO (0.43)
9.1
NO (0.43)
NO (0.43)
NO (0.43)
NO (0.43)
49M
61000
Carbon Tetrachloride
NO (0.41)
NO (0.41)
NO (0.41)
NO (0.41)
NO (0.41)
NO (0.41)
I60
2000
Chlorobenzene
NO (0.45)
NO (0.45)
NO (0.45)
NO (0.45)
NO (0.45)
NO (0.45)
350
4400
Chlomethane
NO (0.52)
NO (0.52)
NO (0.52)
NO (0.52)
NO (0.52)
NO (0.52)
70000
880000
Chloroform
4.6
4.6
1.0
NO(0.36)
34
3.7
41
530
Chloromethane
NO (0.28)
0.92
NO (0.28)
NO (0.28)
NO (0.28)
NO (0.28)
630
7900
Cyclohexane
NO (0.49)
NO (0.49)
NO (0.49)
NO (0.49)
44
NO (0.49)
42000
530000
Dibromochloromethane
NO (0.57)
NO (0,57)
NO (0.57)
NO (0.57)
NO (0.57)
NO (0.57)
1,2-Dibromoethane (EDB)
NO (0.60)
NO (0.60)
NO (0.60)
NO (0.60)
NO (0.60)
NO (0.60)
1.6
20
1,2-Dlchlorobenzene
NO (0.58)
NO (0.58)
NO (0.58)
NO (0.58)
NO (0.58)
NO (0.58)
1400
18000
1,3-Dichlorobenzene
NO (0.62)
NO (0.62)
0.79 J
2.9
NO (0.62)
NO (0.62)
`
`
1,4-Dlchlorobenzene
NO (0.73)
NO (0.73)
NO (0.73)
2.9
NO (0.73)
NO (0.73)
85
1100
Dichlorodifluoromethane (Freon 12)
2.0
2.0
280
330
2.4
2.2
700
8800
1,1-Dlchloroethane
NO (0.25)
NO (0.25)
NO (0.25)
NO (0.25)
NO (0.25)
NO (0.25)
580
7700
1,2-Dichloroethane
NO (0.31)
NO (0.31)
NO (0.31)
NO (0.31)
NO (0.31)
NO (0.31)
36
470
1,1-Dichloroethylene
NO (0.43)
NO (0.43)
NO (0.43)
NO (0.43)
NO (0.43)
NO (0.43)
1400
18000
cis-1,2-Dichloroethylene
NO(0.32)
NO(0.32)
NO(0.32)
NO(0.32)
10
NO(0.32)
`
`
trans-1,2-Dichloroethylene
NO (0.32)
NO (0.32)
NO (0.32)
NO (0.32)
NO (0.32)
NO (0.32)
`
1,2-Dichloropropane
NO (0.33)
NO (0.33)
NO (0.33)
NO (0.33)
NO (0.33)
NO (0.33)
28
350
cis-1,3-Dichloropropene
NO (0.32)
NO (0.32)
NO (0.32)
NO (0.32)
NO (0.32)
NO (0.32)
`
trans-1,3-DIChIDroprOpene
NO (0.33)
NO (0.33)
NO (0.33)
NO (0.33)
NO (0.33)
NO (0.33)
`
1,2-Dlchloro-1,1,2,2-tetrafluoroethane (Freon 114)
NO (0.79)
NO (0.79)
NO (0.79)
NO (0.79)
NO (0.79)
NO (0.79)
-
1,4-Dioxane
NO (4.6)
NO (4.6)
NO(4.6)
NO (4.6)
NO(4.6)
NO(4.6)
190
25M
Ethanol
180 Z-01
200 Z-01
260 Z-01
ISO Z-01
5200 Z-01
630 Z-01
`
^'
Ethyl Acetate
NO (0.54)
NO (0.54)
NO (0.54)
NO (0.54)
NO (0.54)
NO (0.54)
490
61M
Ethylbenzene
0.82)
1.7
1.5
1.5
1.7
2.4
370
4900
4-Ethyl.luene
0.94J
1.4
0.79J
0311
NO(0.60)
1.3
`
`
Heptane
0.95
1.5
NO (0.48)
0.82
NO (0.48)
1.6
2800
35000
Hexachlorobutadiene
NO(0.98)Z-01
NO(0.98)Z-01
NO(0.98)Z-01
NO(0.98)Z-01
NO(0.98)Z-01
NO(0.98)Z-01
43
560
Hexane
NO (1.2)
NO (1.2)
NO (1.2)
NO (1.2)
NO (1.2)
NO (1.2)
4900
61000
2-H.-me (MBK)
NO (0.49)
NO (0.48)
NO (0.48)
NO (0.48)
NO (0.48)
NO (0.48)
210
26M
Isopmpanol
81
too
11J
8.7)
180
36
1400
18000
Methyl tert-Butyl Ether )M WE)
NO(0.36)
NO(0.36)
NO(0.36)
NO(0.36)
57
NO(0.36)
36M
47000
Methylene Chloride
1.3J
0.881
NO(0.94)
NO(0.84)
NO(0.94)
NO(0.94)
4200
53000
4-Methyl-2-pent­ne (MIRK)
NO (0.43)
NO (0.43)
NO (0.43)
NO (0.43)
NO (0.43)
NO (0.43)
21000
260000
Naphthalene
1.4 Z-01
1.5 Z-01
NO(0.90)Z-01
0.82 Z-01,J
1.5 Z-01
0.82 Z-01,1
21
260
Propene
NO (0.64)
NO (0.64)
NO (0.64)
NO (0.64)
NO (0.64)
NO (0.64)
21000
160000
Styrene
NO (0.53)
NO (0.53)
1.2
NO (0.53)
NO (0.53)
NO (0.53)
7000
88000
1,1,2,2-TetrachI.methane
NO (0.61)
NO (0.61)
NO (0.59)
NO (0.61)
NO (0.61)
NO (0.61)
NO (0.61)
16
280
14000
230
3500
180000
etrachlomethylene
edrahydrofuran
0.86
1.8
1.1
NO(0.75)
0.83
97
NO (0.59)
32
NO (0.59)
oluene
5.7
7.7
3.7
4.5
NO (0.39)
14
35000
440000
1,2,4-Trichlorobenzene
NO(1.0)Z-01
NO(1.0)Z-01
NO(1.0)Z-01
NO(1.0)Z-01
NO(1.0)Z-01
NO(1.0)Z-01
14
180
1,1,1-TNchloroethane
NO (0.41)
NO (0.41)
NO (0.41)
NO (0.41)
NO (0.41)
NO (0.41)
35000
440000
1,1,2-Trichloroethane
NO (0.45)
NO (0.45)
NO (0.45)
NO (0.45)
NO (0.45)
NO (0.45)
1.4
18
richloroethylene
2.01
2.IJ
NO (0.43)
6.0
NO (0.43)
3.IJ
7.4
NO(0.85)
NO (0.43)
2.11
14
`
180
`
richlorofluoromethane
1,1,2-Tdchloro-1,2,2-trlfluoroethane(Freon 113)
1.6J
1.5)
1.4J
NO (1.2)
NO(1.2)
2AJ
35000
440000
1,2,4-Trimethylbenzene
NO (0.63)
NO (0.63)
NO (0.63)
NO (0.63)
NO (0.63)
NO (0.63)
420
53M
im 1,3,5-Trethylbenzene
NO(0.62)
1.5
0.85)
0.96J
1.2
1.3
420
5300
Vinyl Acetate
NO (0.44)
NO (0.44)
NO (0.44)
NO (0.44)
NO (0.44)
NO (0.44)
1400
18000
Vinyl Chloride
NO (0.32)
NO (0,32)
NO (0.32)
NO (0.32)
NO (0.32)
NO (0.32)
56
2800
Xylene, mgp
3.2
6.6
6.2
6.4
7.0
10
700
880O
'Ian::o-
1.4
2.8
2.5
2.6
2.8
4.1
700
8800
Resident Soil Gas to Indoor Air Risk Calculation
Residential Acceptable Carcinogenic Sum Risk
Range and Maxiumum Non -Cancer Hazard Index
Calculated Sample Sum Cancer Risk 1.2E-05 9.9E-06
1.0E-M
Calculated Sample Non -Carcinogenic Hazard Index 2.4 2.3E-01
1.0
Non-ResideM Soil Gas to Indoor Air Risk Calculation
Residential Acceptable Carcinogenic Sum Risk
Range and Maxiumum Non -Cancer Hazard Index
Calculated Sample Sum Cancer Risk 7.2E-11
7.4E-07
1.0E-M
Calculated Sample Non -Carcinogenic Hazard Index 1.9E-01
1.9E-02
1.0
NOTES:
1. NO = Not detected above the lab reporting limits shown
In parenthesis.
2. NIT = Not tested.
3.1= Detected but below the Reporting Umlt, therefore, result Is an estlmated concentration
4. Z-01= Compound fails the method requirement of 70-130% recovery for the LCS. Is classified by the
lab as a difficult compound
and passes the in
house limits of 50-I50%
S. Highlighted value exceeds Residential Vapor Intrusion Screening Level
6. Bold value exceeds acceptable Non -Caner Hazard Index of 1.0

LABORATORY ANALYTICAL REPORT AND CHAIN OF CUSTODY
RECORD
Mid Atlantic

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
April 24, 2020
Reina Clark
Mid -Atlantic Associates, Inc. - Raleigh, NC
409 Rogers View Court
Raleigh, NC 27610
Project Location: Durham, NC
Client Job Number:
Project Number: R3153.00 T.80000
Laboratory Work Order Number: 20DO624
Enclosed are results of analyses for samples received by the laboratory on April 15, 2020. If you have any questions concerning
this report, please feel free to contact me.
Sincerely,
I,&, �. A��
Kerry K. McGee
Project Manager
QA Officer
Katherine Allen
Laboratory Manager
Daren Damboragian
Page 1 of 37

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
Mid -Atlantic Associates, Inc. - Raleigh, NC REPORT DATE: 4/24/2020
409 Rogers View Court
Raleigh, NC 27610 PURCHASE ORDER NUMBER: R3153
ATTN: Reina Clark
PROJECT NUMBER: R3153.00 T.80000
ANALYTICAL SUMMARY
WORK ORDER NUMBER: 20DO624
The results of analyses performed on the following samples submitted to the CON -TEST Analytical Laboratory are found in this report.
PROJECT LOCATION: Durham, NC
FIELD SAMPLE # LAB ID: MATRIX SAMPLE DESCRIPTION TEST SUB LAB
SGS-1
20DO624-01
Sub Slab
EPATO-15
SGS-2
20DO624-02
Sub Slab
EPATO-15
SGS-3
20DO624-03
Sub Slab
EPATO-15
SGS-4
20DO624-04
Sub Slab
EPA TO-15
SGS-5
20DO624-05
Sub Slab
EPATO-15
Duplicate
20DO624-06
Sub Slab
EPATO-15
Page 2 of 37

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ANALYTICAL LABORATORY
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:
Cyclohexane
B256833-BLKI, B256833-BSI
Compound fails the method requirement of 70-l3O% recovery for the LCS. Is classified by the lab as a difficult compound and passes the in
house limits of 50-150%.
Analyte & Samples(s) Qualified:
1,2,4-Trichlorobenzene, Ethanol, Hexachlorobutadiene, Naphthalene
20D0624-01[SGS-1], 20D0624-02[SGS-2], 20D0624-03[SGS-3], 20D0624-04[SGS-4], 20D0624-05[SGS-5], 20D0624-06[Duplicate], B256736-BLKI, B256736-BSI,
B256736-DUP1, B256833-BLKI, B256833-BSI, 20D0624-04RE2[SGS-4], 20D0624-05RE1[SGS-5]
The results of analyses reported only relate to samples submitted to the Con -Test 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.
d�
Lisa A. Worthington
Technical Representative
Page 3 of 37

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ANALYTICAL LABORATORY
Project Location: Durham, NC
Date Received: 4/15/2020
Field Sample #: SGS-1
Sample ID: 20DO624-01
Sample Matrix: Sub Slab
Sampled: 4/13/2020 15:45
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Sample Description/Location: Work Order: 20DO624
Sub Description/Location: Initial Vacuum(in Hg): -31
Canister ID: 2317 Final Vacuum(in Hg): -4
Canister Size: 1 liter Receipt Vacuum(in Hg): -5.3
Flow Controller ID: 4339 Flow Controller Type: Fixed -Orifice
Sample Type: 10 min Flow Controller Calibration
RPD Pre and Post -Sampling:
EPA TO-15
ppbv
ug/m3
Date/Time
Analyte
Results
RL
MDL
Flag/Qual
Results
ILL
MDL
Dilution
Analyzed
Analyst
Acetone
110
8.0
2.8
250
19
6.6
4
4/21/20 17:21
BRF
Benzene
0.27
0.20
0.082
0.87
0.64
0.26
4
4/21/20 17:21
BRF
Benzyl chloride
ND
0.20
0.052
ND
1.0
0.27
4
4/21/20 17:21
BRF
Bromodichloromethane
ND
0.20
0.074
ND
1.3
0.49
4
4/21/20 17:21
BRF
Bromoform
ND
0.20
0.090
ND
2.1
0.93
4
4/21/20 17:21
BRF
Bromomethane
ND
0.40
0.14
ND
1.6
0.53
4
4/21/20 17:21
BRF
1,3-Butadiene
ND
0.20
0.15
ND
0.44
0.32
4
4/21/20 17:21
BRF
2-Butanone (MEK)
1.6
8.0
0.37
J
4.7
24
1.1
4
4/21/20 17:21
BRF
Carbon Disulfide
2.9
2.0
0.14
9.1
6.2
0.43
4
4/21/20 17:21
BRF
Carbon Tetrachloride
ND
0.20
0.065
ND
1.3
0.41
4
4/21/20 17:21
BRF
Chlorobenzene
ND
0.20
0.098
ND
0.92
0.45
4
4/21/20 17:21
BRF
Chloroethane
ND
0.20
0.20
ND
0.53
0.52
4
4/21/20 17:21
BRF
Chloroform
0.94
0.20
0.074
4.6
0.98
0.36
4
4/21/20 17:21
BRF
Chloromethane
0.44
0.40
0.14
0.92
0.83
0.28
4
4/21/20 17:21
BRF
Cyclohexane
ND
0.20
0.14
ND
0.69
0.49
4
4/21/20 17:21
BRF
Dibromochloromethane
ND
0.20
0.066
ND
1.7
0.57
4
4/21/20 17:21
BRF
1,2-Dibromoethane (EDB)
ND
0.20
0.078
ND
1.5
0.60
4
4/21/20 17:21
BRF
1,2-Dichlorobenzene
ND
0.20
0.096
ND
1.2
0.58
4
4/21/20 17:21
BRF
1,3-Dichlorobenzene
ND
0.20
0.10
ND
1.2
0.62
4
4/21/20 17:21
BRF
1,4-Dichlorobenzene
ND
0.20
0.12
ND
1.2
0.73
4
4/21/20 17:21
BRF
Dichlorodifluoromethane (Freon 12)
0.40
0.20
0.087
2.0
0.99
0.43
4
4/21/20 17:21
BRF
1, 1 -Dichloroethane
ND
0.20
0.061
ND
0.81
0.25
4
4/21/20 17:21
BRF
1,2-Dichloroethane
ND
0.20
0.076
ND
0.81
0.31
4
4/21/20 17:21
BRF
1, 1 -Dichloroethylene
ND
0.20
0.11
ND
0.79
0.43
4
4/21/20 17:21
BRF
cis-1,2-Dichloroethylene
ND
0.20
0.082
ND
0.79
0.32
4
4/21/20 17:21
BRF
trans-1,2-Dichloroethylene
ND
0.20
0.081
ND
0.79
0.32
4
4/21/20 17:21
BRF
1,2-Dichloropropane
ND
0.20
0.071
ND
0.92
0.33
4
4/21/20 17:21
BRF
cis- 1,3 -Dichloropropene
ND
0.20
0.070
ND
0.91
0.32
4
4/21/20 17:21
BRF
trans- 1, 3 -Dichloropropene
ND
0.20
0.073
ND
0.91
0.33
4
4/21/20 17:21
BRF
1,2-Dichloro- 1, 1,2,2-tetrafluoroethane (Freon 114) ND
0.20
0.11
ND
1.4
0.79
4
4/21/20 17:21
BRF
1,4-Dioxane
ND
2.0
1.3
ND
7.2
4.6
4
4/21/20 17:21
BRF
Ethanol
110
8.0
3.6
Z-01
200
15
6.7
4
4/21/20 17:21
BRF
Ethyl Acetate
ND
0.20
0.15
ND
0.72
0.54
4
4/21/20 17:21
BRF
Ethylbenzene
0.38
0.20
0.12
1.7
0.87
0.50
4
4/21/20 17:21
BRF
4-Ethyltoluene
0.28
0.20
0.12
1.4
0.98
0.60
4
4/21/20 17:21
BRF
Heptane
0.38
0.20
0.12
1.5
0.82
0.48
4
4/21/20 17:21
BRF
Hexachlorobutadiene
ND
0.20
0.092
Z-01
ND
2.1
0.98
4
4/21/20 17:21
BRF
Hexane
ND
8.0
0.35
ND
28
1.2
4
4/21/20 17:21
BRF
2-Hexanone (MBK)
ND
0.20
0.12
ND
0.82
0.48
4
4/21/20 17:21
BRF
Isopropanol
42
8.0
0.37
100
20
0.90
4
4/21/20 17:21
BRF
Methyl tert-Butyl Ether (MTBE)
ND
0.20
0.10
ND
0.72
0.36
4
4/21/20 17:21
BRF
Methylene Chloride
0.25
2.0
0.24
J
0.88
6.9
0.84
4
4/21/20 17:21
BRF
4-Methyl-2-pentanone (MIBK)
ND
0.20
0.10
ND
0.82
0.43
4
4/21/20 17:21
BRF
Naphthalene
0.28
0.20
0.15
Z-01
1.5
1.0
0.80
4
4/21/20 17:21
BRF
Propene
ND
8.0
0.37
ND
14
0.64
4
4/21/20 17:21
BRF
Styrene
ND
0.20
0.12
ND
0.85
0.53
4
4/21/20 17:21
BRF
1,1,2,2-Tetrachloroethane
ND
0.20
0.089
ND
1.4
0.61
4
4/21/20 17:21
BRF
Page 4 of 37

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ANALYTICAL LABORATORY
Project Location: Durham, NC
Date Received: 4/15/2020
Field Sample #: SGS-1
Sample ID: 20DO624-01
Sample Matrix: Sub Slab
Sampled: 4/ 13/2020 15:45
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Sample Description/Location:
Sub Description/Location:
Canister ID: 2317
Canister Size: 1 liter
Flow Controller ID: 4339
Sample Type: 10 min
Work Order: 20DO624
Initial Vacuum(in Hg): -31
Final Vacuum(in Hg): -4
Receipt Vacuum(in Hg): -5.3
Flow Controller Type: Fixed -Orifice
Flow Controller Calibration
RPD Pre and Post -Sampling:
EPA TO-15
ppbv ug/m3 Date/Time
Analyte Results RL MDL Flag/Qual Results RL MDL Dilution Analyzed Analyst
Tetrachloroethylene
110
0.20
0.11
750
1.4
0.75
4
4/21/20 17:21
BRF
Tetrahydrofuran
ND
0.20
0.20
ND
0.59
0.59
4
4/21/20 17:21
BRF
Toluene
2.1
0.20
0.10
7.7
0.75
0.39
4
4/21/20 17:21
BRF
1,2,4-Trichlorobenzene
ND
0.20
0.14
Z-01 ND
1.5
1.0
4
4/21/20 17:21
BRF
1, 1, 1 -Trichloroethane
ND
0.20
0.075
ND
1.1
0.41
4
4/21/20 17:21
BRF
1,1,2-Trichloroethane
ND
0.20
0.082
ND
1.1
0.45
4
4/21/20 17:21
BRF
Trichloroethylene
23
0.20
0.081
120
1.1
0.43
4
4/21/20 17:21
BRF
Trichlorofluoromethane (Freon 11)
0.37
0.80
0.15
J 2.1
4.5
0.85
4
4/21/20 17:21
BRF
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)
0.19
0.80
0.15
J 1.5
6.1
1.2
4
4/21/20 17:21
BRF
1,2,4-Trimethylbenzene
ND
0.20
0.13
ND
0.98
0.63
4
4/21/20 17:21
BRF
1,3,5-Trimethylbenzene
0.30
0.20
0.13
1.5
0.98
0.62
4
4/21/20 17:21
BRF
Vinyl Acetate
ND
4.0
0.12
ND
14
0.44
4
4/21/20 17:21
BRF
Vinyl Chloride
ND
0.20
0.13
ND
0.51
0.32
4
4/21/20 17:21
BRF
m&p-Xylene
1.6
0.40
0.23
6.8
1.7
1.00
4
4/21/20 17:21
BRF
o-Xylene
0.66
0.20
0.12
2.8
0.87
0.54
4
4/21/20 17:21
BRF
Surrogates
4-Bromofluorobenzene (1)
% Recovery
92.7
% REC Limits
70-130
4/21/20 17:21
Page 5 of 37

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ANALYTICAL LABORATORY
Project Location: Durham, NC
Date Received: 4/15/2020
Field Sample #: SGS-2
Sample ID: 20DO624-02
Sample Matrix: Sub Slab
Sampled: 4/13/2020 13:40
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Sample Description/Location: Work Order: 20DO624
Sub Description/Location: Initial Vacuum(in Hg): -27
Canister ID: 2293 Final Vacuum(in Hg): -3
Canister Size: 1 liter Receipt Vacuum(in Hg): -5.5
Flow Controller ID: 4324 Flow Controller Type: Fixed -Orifice
Sample Type: 10 min Flow Controller Calibration
RPD Pre and Post -Sampling:
EPA TO-15
ppbv
ug/m3
Date/Time
Analyte
Results
RL
MDL
Flag/Qual
Results
RL
MDL
Dilution
Analyzed
Analyst
Acetone
51
8.0
2.8
120
19
6.6
4
4/21/20 18:40
BRF
Benzene
0.20
0.20
0.082
0.64
0.64
0.26
4
4/21/20 18:40
BRF
Benzyl chloride
ND
0.20
0.052
ND
1.0
0.27
4
4/21/20 18:40
BRF
Bromodichloromethane
ND
0.20
0.074
ND
1.3
0.49
4
4/21/20 18:40
BRF
Bromoform
ND
0.20
0.090
ND
2.1
0.93
4
4/21/20 18:40
BRF
Bromomethane
ND
0.40
0.14
ND
1.6
0.53
4
4/21/20 18:40
BRF
1,3-Butadiene
ND
0.20
0.15
ND
0.44
0.32
4
4/21/20 18:40
BRF
2-Butanone (MEK)
2.6
8.0
0.37
J
7.7
24
1.1
4
4/21/20 18:40
BRF
Carbon Disulfide
ND
2.0
0.14
ND
6.2
0.43
4
4/21/20 18:40
BRF
Carbon Tetrachloride
ND
0.20
0.065
ND
1.3
0.41
4
4/21/20 18:40
BRF
Chlorobenzene
ND
0.20
0.098
ND
0.92
0.45
4
4/21/20 18:40
BRF
Chloroethane
ND
0.20
0.20
ND
0.53
0.52
4
4/21/20 18:40
BRF
Chloroform
0.20
0.20
0.074
1.00
0.98
0.36
4
4/21/20 18:40
BRF
Chloromethane
ND
0.40
0.14
ND
0.83
0.28
4
4/21/20 18:40
BRF
Cyclohexane
ND
0.20
0.14
ND
0.69
0.49
4
4/21/20 18:40
BRF
Dibromochloromethane
ND
0.20
0.066
ND
1.7
0.57
4
4/21/20 18:40
BRF
1,2-Dibromoethane (EDB)
ND
0.20
0.078
ND
1.5
0.60
4
4/21/20 18:40
BRF
1,2-Dichlorobenzene
ND
0.20
0.096
ND
1.2
0.58
4
4/21/20 18:40
BRF
1,3-Dichlorobenzene
0.13
0.20
0.10
J
0.79
1.2
0.62
4
4/21/20 18:40
BRF
1,4-Dichlorobenzene
ND
0.20
0.12
ND
1.2
0.73
4
4/21/20 18:40
BRF
Dichlorodifluoromethane (Freon 12)
56
0.20
0.087
280
0.99
0.43
4
4/21/20 18:40
BRF
1,1-Dichloroethane
ND
0.20
0.061
ND
0.81
0.25
4
4/21/20 18:40
BRF
1,2-Dichloroethane
ND
0.20
0.076
ND
0.81
0.31
4
4/21/20 18:40
BRF
1,1-Dichloroethylene
ND
0.20
0.11
ND
0.79
0.43
4
4/21/20 18:40
BRF
cis-1,2-Dichloroethylene
ND
0.20
0.082
ND
0.79
0.32
4
4/21/20 18:40
BRF
trans-1,2-Dichloroethylene
ND
0.20
0.081
ND
0.79
0.32
4
4/21/20 18:40
BRF
1,2-Dichloropropane
ND
0.20
0.071
ND
0.92
0.33
4
4/21/20 18:40
BRF
cis- 1,3 -Dichloropropene
ND
0.20
0.070
ND
0.91
0.32
4
4/21/20 18:40
BRF
trans- 1, 3 -Dichloropropene
ND
0.20
0.073
ND
0.91
0.33
4
4/21/20 18:40
BRF
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114) ND
0.20
0.11
ND
1.4
0.79
4
4/21/20 18:40
BRF
1,4-Dioxane
ND
2.0
1.3
ND
7.2
4.6
4
4/21/20 18:40
BRF
Ethanol
140
8.0
3.6
Z-01
260
15
6.7
4
4/21/20 18:40
BRF
Ethyl Acetate
ND
0.20
0.15
ND
0.72
0.54
4
4/21/20 18:40
BRF
Ethylbenzene
0.34
0.20
0.12
1.5
0.87
0.50
4
4/21/20 18:40
BRF
4-Ethyltoluene
0.16
0.20
0.12
J
0.79
0.98
0.60
4
4/21/20 18:40
BRF
Heptane
ND
0.20
0.12
ND
0.82
0.48
4
4/21/20 18:40
BRF
Hexachlorobutadiene
ND
0.20
0.092
Z-01
ND
2.1
0.98
4
4/21/20 18:40
BRF
Hexane
ND
8.0
0.35
ND
28
1.2
4
4/21/20 18:40
BRF
2-Hexanone (MBK)
ND
0.20
0.12
ND
0.82
0.48
4
4/21/20 18:40
BRF
Isopropanol
4.5
8.0
0.37
J
11
20
0.90
4
4/21/20 18:40
BRF
Methyl tert-Butyl Ether (MTBE)
ND
0.20
0.10
ND
0.72
0.36
4
4/21/20 18:40
BRF
Methylene Chloride
ND
2.0
0.24
ND
6.9
0.84
4
4/21/20 18:40
BRF
4-Methyl-2-pentanone (MIBK)
ND
0.20
0.10
ND
0.82
0.43
4
4/21/20 18:40
BRF
Naphthalene
ND
0.20
0.15
Z-01
ND
1.0
0.80
4
4/21/20 18:40
BRF
Propene
ND
8.0
0.37
ND
14
0.64
4
4/21/20 18:40
BRF
Styrene
0.28
0.20
0.12
1.2
0.85
0.53
4
4/21/20 18:40
BRF
1,1,2,2-Tetrachloroethane
ND
0.20
0.089
ND
1.4
0.61
4
4/21/20 18:40
BRF
Page 6 of 37

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Project Location: Durham, NC
Sample Description/Location:
Work Order: 20DO624
Date Received: 4/15/2020
Sub Description/Location:
Initial Vacuum(in Hg): -27
Field Sample #: SGS-2
Canister ID: 2293
Final Vacuum(in Hg): -3
Sample ID: 20DO624-02
Canister Size: 1 liter
Receipt Vacuum(in Hg): -5.5
Sample Matrix: Sub Slab
Flow Controller ID: 4324
Flow Controller Type: Fixed -Orifice
Sampled: 4/13/2020 13:40
Sample Type: 10 min
Flow Controller Calibration
RPD Pre and Post -Sampling:
Analyte
Results
ppbv
RL
EPA TO-15
MDL
Flag/Qual
Results
ug/m3
RL
MDL
Dilution
Date/Time
Analyzed
Analyst
Tetrachloroethylene
0.27
0.20
0.11
1.8
1.4
0.75
4
4/21/20 18:40
BRF
Tetrahydrofuran
0.37
0.20
0.20
1.1
0.59
0.59
4
4/21/20 18:40
BRF
Toluene
0.99
0.20
0.10
3.7
0.75
0.39
4
4/21/20 18:40
BRF
1,2,4-Trichlorobenzene
ND
0.20
0.14
Z-01
ND
1.5
1.0
4
4/21/20 18:40
BRF
1, 1, 1 -Trichloroethane
ND
0.20
0.075
ND
1.1
0.41
4
4/21/20 18:40
BRF
1,1,2-Trichloroethane
ND
0.20
0.082
ND
1.1
0.45
4
4/21/20 18:40
BRF
Trichloroethylene
ND
0.20
0.081
ND
1.1
0.43
4
4/21/20 18:40
BRF
Trichlorofluoromethane (Freon 11)
1.1
0.80
0.15
6.0
4.5
0.85
4
4/21/20 18:40
BRF
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)
0.18
0.80
0.15
J
1.4
6.1
1.2
4
4/21/20 18:40
BRF
1,2,4-Trimethylbenzene
ND
0.20
0.13
ND
0.98
0.63
4
4/21/20 18:40
BRF
1,3,5-Trimethylbenzene
0.17
0.20
0.13
J
0.85
0.98
0.62
4
4/21/20 18:40
BRF
Vinyl Acetate
ND
4.0
0.12
ND
14
0.44
4
4/21/20 18:40
BRF
Vinyl Chloride
ND
0.20
0.13
ND
0.51
0.32
4
4/21/20 18:40
BRF
m&p-Xylene
1.4
0.40
0.23
6.2
1.7
1.00
4
4/21/20 18:40
BRF
o-Xylene
0.58
0.20
0.12
2.5
0.87
0.54
4
4/21/20 18:40
BRF
Surrogates % Recovery % REC Limits
4-Bromofluorobenzene (1) 91.7 70-130 4/21/20 18:40
Page 7 of 37

icon-tes w .
ANALYTICAL LABORATORY
Project Location: Durham, NC
Date Received: 4/15/2020
Field Sample #: SGS-3
Sample ID: 20DO624-03
Sample Matrix: Sub Slab
Sampled: 4/13/2020 14:39
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Sample Description/Location: Work Order: 20DO624
Sub Description/Location: Initial Vacuum(in Hg): -29
Canister ID: 2255 Final Vacuum(in Hg): -4
Canister Size: 1 liter Receipt Vacuum(in Hg): -4.6
Flow Controller ID: 4347 Flow Controller Type: Fixed -Orifice
Sample Type: 10 min Flow Controller Calibration
RPD Pre and Post -Sampling:
EPA TO-15
ppbv
ug/m3
Date/Time
Analyte
Results
RL
MDL
Flag/Qual
Results
RL
MDL
Dilution
Analyzed
Analyst
Acetone
22
8.0
2.8
51
19
6.6
4
4/21/20 20:01
BRF
Benzene
0.22
0.20
0.082
0.70
0.64
0.26
4
4/21/20 20:01
BRF
Benzyl chloride
ND
0.20
0.052
ND
1.0
0.27
4
4/21/20 20:01
BRF
Bromodichloromethane
ND
0.20
0.074
ND
1.3
0.49
4
4/21/20 20:01
BRF
Bromoform
ND
0.20
0.090
ND
2.1
0.93
4
4/21/20 20:01
BRF
Bromomethane
ND
0.40
0.14
ND
1.6
0.53
4
4/21/20 20:01
BRF
1,3-Butadiene
ND
0.20
0.15
ND
0.44
0.32
4
4/21/20 20:01
BRF
2-Butanone (MEK)
1.6
8.0
0.37
J
4.7
24
1.1
4
4/21/20 20:01
BRF
Carbon Disulfide
ND
2.0
0.14
ND
6.2
0.43
4
4/21/20 20:01
BRF
Carbon Tetrachloride
ND
0.20
0.065
ND
1.3
0.41
4
4/21/20 20:01
BRF
Chlorobenzene
ND
0.20
0.098
ND
0.92
0.45
4
4/21/20 20:01
BRF
Chloroethane
ND
0.20
0.20
ND
0.53
0.52
4
4/21/20 20:01
BRF
Chloroform
ND
0.20
0.074
ND
0.98
0.36
4
4/21/20 20:01
BRF
Chloromethane
ND
0.40
0.14
ND
0.83
0.28
4
4/21/20 20:01
BRF
Cyclohexane
ND
0.20
0.14
ND
0.69
0.49
4
4/21/20 20:01
BRF
Dibromochloromethane
ND
0.20
0.066
ND
1.7
0.57
4
4/21/20 20:01
BRF
1,2-Dibromoethane (EDB)
ND
0.20
0.078
ND
1.5
0.60
4
4/21/20 20:01
BRF
1,2-Dichlorobenzene
ND
0.20
0.096
ND
1.2
0.58
4
4/21/20 20:01
BRF
1,3-Dichlorobenzene
0.48
0.20
0.10
2.9
1.2
0.62
4
4/21/20 20:01
BRF
1,4-Dichlorobenzene
0.48
0.20
0.12
2.9
1.2
0.73
4
4/21/20 20:01
BRF
Dichlorodifluoromethane (Freon 12)
67
0.20
0.087
330
0.99
0.43
4
4/21/20 20:01
BRF
1,1-Dichloroethane
ND
0.20
0.061
ND
0.81
0.25
4
4/21/20 20:01
BRF
1,2-Dichloroethane
ND
0.20
0.076
ND
0.81
0.31
4
4/21/20 20:01
BRF
1,1-Dichloroethylene
ND
0.20
0.11
ND
0.79
0.43
4
4/21/20 20:01
BRF
cis-1,2-Dichloroethylene
ND
0.20
0.082
ND
0.79
0.32
4
4/21/20 20:01
BRF
trans-1,2-Dichloroethylene
ND
0.20
0.081
ND
0.79
0.32
4
4/21/20 20:01
BRF
1,2-Dichloropropane
ND
0.20
0.071
ND
0.92
0.33
4
4/21/20 20:01
BRF
cis- 1,3 -Dichloropropene
ND
0.20
0.070
ND
0.91
0.32
4
4/21/20 20:01
BRF
trans- 1, 3 -Dichloropropene
ND
0.20
0.073
ND
0.91
0.33
4
4/21/20 20:01
BRF
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114) ND
0.20
0.11
ND
1.4
0.79
4
4/21/20 20:01
BRF
1,4-Dioxane
ND
2.0
1.3
ND
7.2
4.6
4
4/21/20 20:01
BRF
Ethanol
81
8.0
3.6
Z-01
150
15
6.7
4
4/21/20 20:01
BRF
Ethyl Acetate
ND
0.20
0.15
ND
0.72
0.54
4
4/21/20 20:01
BRF
Ethylbenzene
0.34
0.20
0.12
1.5
0.87
0.50
4
4/21/20 20:01
BRF
4-Ethyltoluene
0.16
0.20
0.12
J
0.81
0.98
0.60
4
4/21/20 20:01
BRF
Heptane
0.20
0.20
0.12
0.82
0.82
0.48
4
4/21/20 20:01
BRF
Hexachlorobutadiene
ND
0.20
0.092
Z-01
ND
2.1
0.98
4
4/21/20 20:01
BRF
Hexane
ND
8.0
0.35
ND
28
1.2
4
4/21/20 20:01
BRF
2-Hexanone (MBK)
ND
0.20
0.12
ND
0.82
0.48
4
4/21/20 20:01
BRF
Isopropanol
3.6
8.0
0.37
J
8.7
20
0.90
4
4/21/20 20:01
BRF
Methyl tert-Butyl Ether (MTBE)
ND
0.20
0.10
ND
0.72
0.36
4
4/21/20 20:01
BRF
Methylene Chloride
ND
2.0
0.24
ND
6.9
0.84
4
4/21/20 20:01
BRF
4-Methyl-2-pentanone (MIBK)
ND
0.20
0.10
ND
0.82
0.43
4
4/21/20 20:01
BRF
Naphthalene
0.16
0.20
0.15
Z-01, J
0.82
1.0
0.80
4
4/21/20 20:01
BRF
Propene
ND
8.0
0.37
ND
14
0.64
4
4/21/20 20:01
BRF
Styrene
ND
0.20
0.12
ND
0.85
0.53
4
4/21/20 20:01
BRF
1,1,2,2-Tetrachloroethane
ND
0.20
0.089
ND
1.4
0.61
4
4/21/20 20:01
BRF
Page 8 of 37

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Project Location: Durham, NC
Sample Description/Location:
Work Order: 20DO624
Date Received: 4/15/2020
Sub Description/Location:
Initial Vacuum(in Hg): -29
Field Sample #: SGS-3
Canister ID: 2255
Final Vacuum(in Hg): -4
Sample ID: 20DO624-03
Canister Size: 1 liter
Receipt Vacuum(in Hg): -4.6
Sample Matrix: Sub Slab
Flow Controller ID: 4347
Flow Controller Type: Fixed -Orifice
Sampled: 4/13/2020 14:39
Sample Type: 10 min
Flow Controller Calibration
RPD Pre and Post -Sampling:
Analyte
Results
ppbv
RL
EPA TO-15
MDL
Flag/Qual
Results
ug/m3
RL
MDL
Dilution
Date/Time
Analyzed
Analyst
Tetrachloroethylene
ND
0.20
0.11
ND
1.4
0.75
4
4/21/20 20:01
BRF
Tetrahydrofuran
0.28
0.20
0.20
0.83
0.59
0.59
4
4/21/20 20:01
BRF
Toluene
1.2
0.20
0.10
4.5
0.75
0.39
4
4/21/20 20:01
BRF
1,2,4-Trichlorobenzene
ND
0.20
0.14
Z-01
ND
1.5
1.0
4
4/21/20 20:01
BRF
1, 1, 1 -Trichloroethane
ND
0.20
0.075
ND
1.1
0.41
4
4/21/20 20:01
BRF
1,1,2-Trichloroethane
ND
0.20
0.082
ND
1.1
0.45
4
4/21/20 20:01
BRF
Trichloroethylene
ND
0.20
0.081
ND
1.1
0.43
4
4/21/20 20:01
BRF
Trichlorofluoromethane (Freon 11)
0.54
0.80
0.15
J
3.1
4.5
0.85
4
4/21/20 20:01
BRF
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)
ND
0.80
0.15
ND
6.1
1.2
4
4/21/20 20:01
BRF
1,2,4-Trimethylbenzene
ND
0.20
0.13
ND
0.98
0.63
4
4/21/20 20:01
BRF
1,3,5-Trimethylbenzene
0.20
0.20
0.13
J
0.96
0.98
0.62
4
4/21/20 20:01
BRF
Vinyl Acetate
ND
4.0
0.12
ND
14
0.44
4
4/21/20 20:01
BRF
Vinyl Chloride
ND
0.20
0.13
ND
0.51
0.32
4
4/21/20 20:01
BRF
m&p-Xylene
1.5
0.40
0.23
6.4
1.7
1.00
4
4/21/20 20:01
BRF
o-Xylene
0.60
0.20
0.12
2.6
0.87
0.54
4
4/21/20 20:01
BRF
Surrogates % Recovery % REC Limits
4-Bromofluorobenzene (1) 93.6 70-130 4/21/20 20:01
Page 9 of 37

icon-tes w .
ANALYTICAL LABORATORY
Project Location: Durham, NC
Date Received: 4/15/2020
Field Sample #: SGS-4
Sample ID: 20DO624-04
Sample Matrix: Sub Slab
Sampled: 4/13/2020 10:20
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Sample Description/Location: Work Order: 20DO624
Sub Description/Location: Initial Vacuum(in Hg): -30
Canister ID: 2331 Final Vacuum(in Hg): -4
Canister Size: 1 liter Receipt Vacuum(in Hg): -4.7
Flow Controller ID: 4338 Flow Controller Type: Fixed -Orifice
Sample Type: 10 min Flow Controller Calibration
RPD Pre and Post -Sampling:
EPA TO-15
ppbv
ug/m3
Date/Time
Analyte
Results
RL
MDL Flag/Qual
Results
RL
MDL
Dilution
Analyzed
Analyst
Acetone
530
40
14
1300
95
33
20
4/22/20 17:12
BRF
Benzene
ND
0.20
0.082
ND
0.64
0.26
4
4/21/20 20:41
BRF
Benzyl chloride
ND
0.20
0.052
ND
1.0
0.27
4
4/21/20 20:41
BRF
Bromodichloromethane
ND
0.20
0.074
ND
1.3
0.49
4
4/21/20 20:41
BRF
Bromoform
ND
0.20
0.090
ND
2.1
0.93
4
4/21/20 20:41
BRF
Bromomethane
ND
0.40
0.14
ND
1.6
0.53
4
4/21/20 20:41
BRF
1,3-Butadiene
ND
0.20
0.15
ND
0.44
0.32
4
4/21/20 20:41
BRF
2-Butanone (MEK)
29
8.0
0.37
84
24
1.1
4
4/21/20 20:41
BRF
Carbon Disulfide
ND
2.0
0.14
ND
6.2
0.43
4
4/21/20 20:41
BRF
Carbon Tetrachloride
ND
0.20
0.065
ND
1.3
0.41
4
4/21/20 20:41
BRF
Chlorobenzene
ND
0.20
0.098
ND
0.92
0.45
4
4/21/20 20:41
BRF
Chloroethane
ND
0.20
0.20
ND
0.53
0.52
4
4/21/20 20:41
BRF
Chloroform
7.0
0.20
0.074
34
0.98
0.36
4
4/21/20 20:41
BRF
Chloromethane
ND
0.40
0.14
ND
0.83
0.28
4
4/21/20 20:41
BRF
Cyclohexane
13
0.20
0.14
44
0.69
0.49
4
4/21/20 20:41
BRF
Dibromochloromethane
ND
0.20
0.066
ND
1.7
0.57
4
4/21/20 20:41
BRF
1,2-Dibromoethane (EDB)
ND
0.20
0.078
ND
1.5
0.60
4
4/21/20 20:41
BRF
1,2-Dichlorobenzene
ND
0.20
0.096
ND
1.2
0.58
4
4/21/20 20:41
BRF
1,3-Dichlorobenzene
ND
0.20
0.10
ND
1.2
0.62
4
4/21/20 20:41
BRF
1,4-Dichlorobenzene
ND
0.20
0.12
ND
1.2
0.73
4
4/21/20 20:41
BRF
Dichlorodifluoromethane (Freon 12)
0.48
0.20
0.087
2.4
0.99
0.43
4
4/21/20 20:41
BRF
1,1-Dichloroethane
ND
0.20
0.061
ND
0.81
0.25
4
4/21/20 20:41
BRF
1,2-Dichloroethane
ND
0.20
0.076
ND
0.81
0.31
4
4/21/20 20:41
BRF
1,1-Dichloroethylene
ND
0.20
0.11
ND
0.79
0.43
4
4/21/20 20:41
BRF
cis-1,2-Dichloroethylene
2.6
0.20
0.082
10
0.79
0.32
4
4/21/20 20:41
BRF
trans-1,2-Dichloroethylene
ND
0.20
0.081
ND
0.79
0.32
4
4/21/20 20:41
BRF
1,2-Dichloropropane
ND
0.20
0.071
ND
0.92
0.33
4
4/21/20 20:41
BRF
cis- 1,3 -Dichloropropene
ND
0.20
0.070
ND
0.91
0.32
4
4/21/20 20:41
BRF
trans- 1, 3 -Dichloropropene
ND
0.20
0.073
ND
0.91
0.33
4
4/21/20 20:41
BRF
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114) ND
0.20
0.11
ND
1.4
0.79
4
4/21/20 20:41
BRF
1,4-Dioxane
ND
2.0
1.3
ND
7.2
4.6
4
4/21/20 20:41
BRF
Ethanol
2700
120
54 Z-01
5200
230
100
60
4/22/20 17:51
BRF
Ethyl Acetate
ND
0.20
0.15
ND
0.72
0.54
4
4/21/20 20:41
BRF
Ethylbenzene
0.40
0.20
0.12
1.7
0.87
0.50
4
4/21/20 20:41
BRF
4-Ethyltoluene
ND
0.20
0.12
ND
0.98
0.60
4
4/21/20 20:41
BRF
Heptane
ND
0.20
0.12
ND
0.82
0.48
4
4/21/20 20:41
BRF
Hexachlorobutadiene
ND
0.20
0.092 Z-01
ND
2.1
0.98
4
4/21/20 20:41
BRF
Hexane
ND
8.0
0.35
ND
28
1.2
4
4/21/20 20:41
BRF
2-Hexanone (MBK)
ND
0.20
0.12
ND
0.82
0.48
4
4/21/20 20:41
BRF
Isopropanol
72
8.0
0.37
180
20
0.90
4
4/21/20 20:41
BRF
Methyl tert-Butyl Ether (MTBE)
16
0.20
0.10
57
0.72
0.36
4
4/21/20 20:41
BRF
Methylene Chloride
ND
2.0
0.24
ND
6.9
0.84
4
4/21/20 20:41
BRF
4-Methyl-2-pentanone (MIBK)
ND
0.20
0.10
ND
0.82
0.43
4
4/21/20 20:41
BRF
Naphthalene
0.28
0.20
0.15 Z-01
1.5
1.0
0.80
4
4/21/20 20:41
BRF
Propene
ND
8.0
0.37
ND
14
0.64
4
4/21/20 20:41
BRF
Styrene
ND
0.20
0.12
ND
0.85
0.53
4
4/21/20 20:41
BRF
1,1,2,2-Tetrachloroethane
ND
0.20
0.089
ND
1.4
0.61
4
4/21/20 20:41
BRF
Page 10 of 37

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Project Location: Durham, NC
Sample Description/Location:
Work Order: 20DO624
Date Received: 4/15/2020
Sub Description/Location:
Initial Vacuum(in Hg): -30
Field Sample #: SGS-4
Canister ID: 2331
Final Vacuum(in Hg): -4
Sample ID: 20DO624-04
Canister Size: 1 liter
Receipt Vacuum(in Hg): -4.7
Sample Matrix: Sub Slab
Flow Controller ID: 4338
Flow Controller Type: Fixed -Orifice
Sampled: 4/13/2020 10:20
Sample Type: 10 min
Flow Controller Calibration
RPD Pre and Post -Sampling:
EPA TO-15
ppbv
ug/m3
Date/Time
Analyte
Results
RL
MDL
Flag/Qual Results
RL
MDL
Dilution
Analyzed
Analyst
Tetrachloroethylene
14
0.20
0.11
97
1.4
0.75
4
4/21/20 20:41
BRF
Tetrahydrofuran
ND
0.20
0.20
ND
0.59
0.59
4
4/21/20 20:41
BRF
Toluene
ND
0.20
0.10
ND
0.75
0.39
4
4/21/20 20:41
BRF
1,2,4-Trichlorobenzene
ND
0.20
0.14
Z-01 ND
1.5
1.0
4
4/21/20 20:41
BRF
1, 1, 1 -Trichloroethane
ND
0.20
0.075
ND
1.1
0.41
4
4/21/20 20:41
BRF
1,1,2-Trichloroethane
ND
0.20
0.082
ND
1.1
0.45
4
4/21/20 20:41
BRF
Trichloroethylene
1.4
0.20
0.081
7.4
1.1
0.43
4
4/21/20 20:41
BRF
Trichlorofluoromethane (Freon 11)
ND
0.80
0.15
ND
4.5
0.85
4
4/21/20 20:41
BRF
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)
ND
0.80
0.15
ND
6.1
1.2
4
4/21/20 20:41
BRF
1,2,4-Trimethylbenzene
ND
0.20
0.13
ND
0.98
0.63
4
4/21/20 20:41
BRF
1,3,5-Trimethylbenzene
0.25
0.20
0.13
1.2
0.98
0.62
4
4/21/20 20:41
BRF
Vinyl Acetate
ND
4.0
0.12
ND
14
0.44
4
4/21/20 20:41
BRF
Vinyl Chloride
ND
0.20
0.13
ND
0.51
0.32
4
4/21/20 20:41
BRF
m&p-Xylene
1.6
0.40
0.23
7.0
1.7
1.00
4
4/21/20 20:41
BRF
o-Xylene
0.65
0.20
0.12
2.8
0.87
0.54
4
4/21/20 20:41
BRF
Surrogates
% Recovery
% REC Limits
4-Bromofluorobenzene (1)
92.5
70-130
4/22/20 17:12
4-Bromofluorobenzene (1)
91.2
70-130
4/22/20 17:51
4-Bromofluorobenzene (1)
96.0
70-130
4/21/20 20:41
Page 11 of 37

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Project Location: Durham, NC
Sample Description/Location:
Work Order: 20DO624
Date Received: 4/15/2020
Sub Description/Location:
Initial Vacuum(in Hg): -28
Field Sample #: SGS-5
Canister ID: 2119
Final Vacuum(in Hg): -4
Sample ID: 20DO624-05
Canister Size: 1 liter
Receipt Vacuum(in Hg): -3.8
Sample Matrix: Sub Slab
Flow Controller ID: 4074
Flow Controller Type: Fixed -Orifice
Sampled: 4/13/2020 11:51
Sample Type: 10 min
Flow Controller Calibration
RPD Pre and Post -Sampling:
Analyte
Results
ppbv
RL
EPA TO-15
MDL
Flag/Qual
Results
ug/m3
RL
MDL
Dilution
Date/Time
Analyzed
Analyst
Acetone
230
40
14
540
95
33
20
4/22/20 18:30
BRF
Benzene
0.13
0.20
0.082
J
0.41
0.64
0.26
4
4/21/20 22:01
BRF
Benzyl chloride
ND
0.20
0.052
ND
1.0
0.27
4
4/21/20 22:01
BRF
Bromodichloromethane
ND
0.20
0.074
ND
1.3
0.49
4
4/21/20 22:01
BRF
Bromoform
ND
0.20
0.090
ND
2.1
0.93
4
4/21/20 22:01
BRF
Bromomethane
ND
0.40
0.14
ND
1.6
0.53
4
4/21/20 22:01
BRF
1,3-Butadiene
ND
0.20
0.15
ND
0.44
0.32
4
4/21/20 22:01
BRF
2-Butanone (MEK)
4.6
8.0
0.37
J
14
24
1.1
4
4/21/20 22:01
BRF
Carbon Disulfide
ND
2.0
0.14
ND
6.2
0.43
4
4/21/20 22:01
BRF
Carbon Tetrachloride
ND
0.20
0.065
ND
1.3
0.41
4
4/21/20 22:01
BRF
Chlorobenzene
ND
0.20
0.098
ND
0.92
0.45
4
4/21/20 22:01
BRF
Chloroethane
ND
0.20
0.20
ND
0.53
0.52
4
4/21/20 22:01
BRF
Chloroform
0.75
0.20
0.074
3.7
0.98
0.36
4
4/21/20 22:01
BRF
Chloromethane
ND
0.40
0.14
ND
0.83
0.28
4
4/21/20 22:01
BRF
Cyclohexane
ND
0.20
0.14
ND
0.69
0.49
4
4/21/20 22:01
BRF
Dibromochloromethane
ND
0.20
0.066
ND
1.7
0.57
4
4/21/20 22:01
BRF
1,2-Dibromoethane (EDB)
ND
0.20
0.078
ND
1.5
0.60
4
4/21/20 22:01
BRF
1,2-Dichlorobenzene
ND
0.20
0.096
ND
1.2
0.58
4
4/21/20 22:01
BRF
1,3-Dichlorobenzene
ND
0.20
0.10
ND
1.2
0.62
4
4/21/20 22:01
BRF
1,4-Dichlorobenzene
ND
0.20
0.12
ND
1.2
0.73
4
4/21/20 22:01
BRF
Dichlorodifluoromethane (Freon 12)
0.44
0.20
0.087
2.2
0.99
0.43
4
4/21/20 22:01
BRF
1,1-Dichloroethane
ND
0.20
0.061
ND
0.81
0.25
4
4/21/20 22:01
BRF
1,2-Dichloroethane
ND
0.20
0.076
ND
0.81
0.31
4
4/21/20 22:01
BRF
1,1-Dichloroethylene
ND
0.20
0.11
ND
0.79
0.43
4
4/21/20 22:01
BRF
cis-1,2-Dichloroethylene
ND
0.20
0.082
ND
0.79
0.32
4
4/21/20 22:01
BRF
trans-1,2-Dichloroethylene
ND
0.20
0.081
ND
0.79
0.32
4
4/21/20 22:01
BRF
1,2-Dichloropropane
ND
0.20
0.071
ND
0.92
0.33
4
4/21/20 22:01
BRF
cis- 1,3 -Dichloropropene
ND
0.20
0.070
ND
0.91
0.32
4
4/21/20 22:01
BRF
trans- 1, 3 -Dichloropropene
ND
0.20
0.073
ND
0.91
0.33
4
4/21/20 22:01
BRF
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114)
ND
0.20
0.11
ND
1.4
0.79
4
4/21/20 22:01
BRF
1,4-Dioxane
ND
2.0
1.3
ND
7.2
4.6
4
4/21/20 22:01
BRF
Ethanol
330
40
18
Z-01
630
75
34
20
4/22/20 18:30
BRF
Ethyl Acetate
ND
0.20
0.15
ND
0.72
0.54
4
4/21/20 22:01
BRF
Ethylbenzene
0.56
0.20
0.12
2.4
0.87
0.50
4
4/21/20 22:01
BRF
4-Ethyltoluene
0.26
0.20
0.12
1.3
0.98
0.60
4
4/21/20 22:01
BRF
Heptane
0.40
0.20
0.12
1.6
0.82
0.48
4
4/21/20 22:01
BRF
Hexachlorobutadiene
ND
0.20
0.092
Z-01
ND
2.1
0.98
4
4/21/20 22:01
BRF
Hexane
ND
8.0
0.35
ND
28
1.2
4
4/21/20 22:01
BRF
2-Hexanone (MBK)
ND
0.20
0.12
ND
0.82
0.48
4
4/21/20 22:01
BRF
Isopropanol
15
8.0
0.37
36
20
0.90
4
4/21/20 22:01
BRF
Methyl tert-Butyl Ether (MTBE)
ND
0.20
0.10
ND
0.72
0.36
4
4/21/20 22:01
BRF
Methylene Chloride
ND
2.0
0.24
ND
6.9
0.84
4
4/21/20 22:01
BRF
4-Methyl-2-pentanone (MIBK)
ND
0.20
0.10
ND
0.82
0.43
4
4/21/20 22:01
BRF
Naphthalene
0.16
0.20
0.15
Z-01, J
0.82
1.0
0.80
4
4/21/20 22:01
BRF
Propene
ND
8.0
0.37
ND
14
0.64
4
4/21/20 22:01
BRF
Styrene
ND
0.20
0.12
ND
0.85
0.53
4
4/21/20 22:01
BRF
1,1,2,2-Tetrachloroethane
ND
0.20
0.089
ND
1.4
0.61
4
4/21/20 22:01
BRF
Page 12 of 37

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Project Location: Durham, NC
Sample Description/Location:
Work Order: 20DO624
Date Received: 4/15/2020
Sub Description/Location:
Initial Vacuum(in Hg): -28
Field Sample #: SGS-5
Canister ID: 2119
Final Vacuum(in Hg): -4
Sample ID: 20DO624-05
Canister Size: 1 liter
Receipt Vacuum(in Hg): -3.8
Sample Matrix: Sub Slab
Flow Controller ID: 4074
Flow Controller Type: Fixed -Orifice
Sampled: 4/13/2020 11:51
Sample Type: 10 min
Flow Controller Calibration
RPD Pre and Post -Sampling:
EPA TO-15
ppbv
ug/m3
Date/Time
Analyte
Results
RL
MDL
Flag/Qual Results
RL
MDL
Dilution
Analyzed
Analyst
Tetrachloroethylene
4.8
0.20
0.11
32
1.4
0.75
4
4/21/20 22:01
BRF
Tetrahydrofuran
ND
0.20
0.20
ND
0.59
0.59
4
4/21/20 22:01
BRF
Toluene
3.8
0.20
0.10
14
0.75
0.39
4
4/21/20 22:01
BRF
1,2,4-Trichlorobenzene
ND
0.20
0.14
Z-01 ND
1.5
1.0
4
4/21/20 22:01
BRF
1, 1, 1 -Trichloroethane
ND
0.20
0.075
ND
1.1
0.41
4
4/21/20 22:01
BRF
1,1,2-Trichloroethane
ND
0.20
0.082
ND
1.1
0.45
4
4/21/20 22:01
BRF
Trichloroethylene
ND
0.20
0.081
ND
1.1
0.43
4
4/21/20 22:01
BRF
Trichlorofluoromethane (Freon 11)
0.37
0.80
0.15
J 2.1
4.5
0.85
4
4/21/20 22:01
BRF
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)
0.27
0.80
0.15
J 2.1
6.1
1.2
4
4/21/20 22:01
BRF
1,2,4-Trimethylbenzene
ND
0.20
0.13
ND
0.98
0.63
4
4/21/20 22:01
BRF
1,3,5-Trimethylbenzene
0.27
0.20
0.13
1.3
0.98
0.62
4
4/21/20 22:01
BRF
Vinyl Acetate
ND
4.0
0.12
ND
14
0.44
4
4/21/20 22:01
BRF
Vinyl Chloride
ND
0.20
0.13
ND
0.51
0.32
4
4/21/20 22:01
BRF
m&p-Xylene
2.3
0.40
0.23
10
1.7
1.00
4
4/21/20 22:01
BRF
o-Xylene
0.94
0.20
0.12
4.1
0.87
0.54
4
4/21/20 22:01
BRF
Surrogates
% Recovery
% REC Limits
4-Bromofluorobenzene (1)
92.6
70-130
4/22/20 18:30
4-Bromofluorobenzene (1)
96.3
70-130
4/21/20 22:01
Page 13 of 37

icon-tes w .
ANALYTICAL LABORATORY
Project Location: Durham, NC
Date Received: 4/15/2020
Field Sample #: Duplicate
Sample ID: 20DO624-06
Sample Matrix: Sub Slab
Sampled: 4/13/2020 16:01
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Sample Description/Location: Work Order: 20DO624
Sub Description/Location: Initial Vacuum(in Hg): -27
Canister ID: 2316 Final Vacuum(in Hg): -3
Canister Size: 1 liter Receipt Vacuum(in Hg): -4.7
Flow Controller ID: 4348 Flow Controller Type: Fixed -Orifice
Sample Type: 10 min Flow Controller Calibration
RPD Pre and Post -Sampling:
EPA TO-15
ppbv
ug/m3
Date/Time
Analyte
Results
RL
MDL
Flag/Qual
Results
RL
MDL
Dilution
Analyzed
Analyst
Acetone
81
8.0
2.8
190
19
6.6
4
4/21/20 22:41
BRF
Benzene
0.24
0.20
0.082
0.77
0.64
0.26
4
4/21/20 22:41
BRF
Benzyl chloride
ND
0.20
0.052
ND
1.0
0.27
4
4/21/20 22:41
BRF
Bromodichloromethane
ND
0.20
0.074
ND
1.3
0.49
4
4/21/20 22:41
BRF
Bromoform
ND
0.20
0.090
ND
2.1
0.93
4
4/21/20 22:41
BRF
Bromomethane
ND
0.40
0.14
ND
1.6
0.53
4
4/21/20 22:41
BRF
1,3-Butadiene
ND
0.20
0.15
ND
0.44
0.32
4
4/21/20 22:41
BRF
2-Butanone (MEK)
1.9
8.0
0.37
J
5.5
24
1.1
4
4/21/20 22:41
BRF
Carbon Disulfide
ND
2.0
0.14
ND
6.2
0.43
4
4/21/20 22:41
BRF
Carbon Tetrachloride
ND
0.20
0.065
ND
1.3
0.41
4
4/21/20 22:41
BRF
Chlorobenzene
ND
0.20
0.098
ND
0.92
0.45
4
4/21/20 22:41
BRF
Chloroethane
ND
0.20
0.20
ND
0.53
0.52
4
4/21/20 22:41
BRF
Chloroform
0.95
0.20
0.074
4.6
0.98
0.36
4
4/21/20 22:41
BRF
Chloromethane
ND
0.40
0.14
ND
0.83
0.28
4
4/21/20 22:41
BRF
Cyclohexane
ND
0.20
0.14
ND
0.69
0.49
4
4/21/20 22:41
BRF
Dibromochloromethane
ND
0.20
0.066
ND
1.7
0.57
4
4/21/20 22:41
BRF
1,2-Dibromoethane (EDB)
ND
0.20
0.078
ND
1.5
0.60
4
4/21/20 22:41
BRF
1,2-Dichlorobenzene
ND
0.20
0.096
ND
1.2
0.58
4
4/21/20 22:41
BRF
1,3-Dichlorobenzene
ND
0.20
0.10
ND
1.2
0.62
4
4/21/20 22:41
BRF
1,4-Dichlorobenzene
ND
0.20
0.12
ND
1.2
0.73
4
4/21/20 22:41
BRF
Dichlorodifluoromethane (Freon 12)
0.41
0.20
0.087
2.0
0.99
0.43
4
4/21/20 22:41
BRF
1,1-Dichloroethane
ND
0.20
0.061
ND
0.81
0.25
4
4/21/20 22:41
BRF
1,2-Dichloroethane
ND
0.20
0.076
ND
0.81
0.31
4
4/21/20 22:41
BRF
1,1-Dichloroethylene
ND
0.20
0.11
ND
0.79
0.43
4
4/21/20 22:41
BRF
cis-1,2-Dichloroethylene
ND
0.20
0.082
ND
0.79
0.32
4
4/21/20 22:41
BRF
trans-1,2-Dichloroethylene
ND
0.20
0.081
ND
0.79
0.32
4
4/21/20 22:41
BRF
1,2-Dichloropropane
ND
0.20
0.071
ND
0.92
0.33
4
4/21/20 22:41
BRF
cis- 1,3 -Dichloropropene
ND
0.20
0.070
ND
0.91
0.32
4
4/21/20 22:41
BRF
trans- 1, 3 -Dichloropropene
ND
0.20
0.073
ND
0.91
0.33
4
4/21/20 22:41
BRF
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114) ND
0.20
0.11
ND
1.4
0.79
4
4/21/20 22:41
BRF
1,4-Dioxane
ND
2.0
1.3
ND
7.2
4.6
4
4/21/20 22:41
BRF
Ethanol
97
8.0
3.6
Z-01
180
15
6.7
4
4/21/20 22:41
BRF
Ethyl Acetate
ND
0.20
0.15
ND
0.72
0.54
4
4/21/20 22:41
BRF
Ethylbenzene
0.19
0.20
0.12
J
0.82
0.87
0.50
4
4/21/20 22:41
BRF
4-Ethyltoluene
0.19
0.20
0.12
J
0.94
0.98
0.60
4
4/21/20 22:41
BRF
Heptane
0.23
0.20
0.12
0.95
0.82
0.48
4
4/21/20 22:41
BRF
Hexachlorobutadiene
ND
0.20
0.092
Z-01
ND
2.1
0.98
4
4/21/20 22:41
BRF
Hexane
ND
8.0
0.35
ND
28
1.2
4
4/21/20 22:41
BRF
2-Hexanone (MBK)
ND
0.20
0.12
ND
0.82
0.48
4
4/21/20 22:41
BRF
Isopropanol
33
8.0
0.37
81
20
0.90
4
4/21/20 22:41
BRF
Methyl tert-Butyl Ether (MTBE)
ND
0.20
0.10
ND
0.72
0.36
4
4/21/20 22:41
BRF
Methylene Chloride
0.36
2.0
0.24
J
1.3
6.9
0.84
4
4/21/20 22:41
BRF
4-Methyl-2-pentanone (MIBK)
ND
0.20
0.10
ND
0.82
0.43
4
4/21/20 22:41
BRF
Naphthalene
0.27
0.20
0.15
Z-01
1.4
1.0
0.80
4
4/21/20 22:41
BRF
Propene
ND
8.0
0.37
ND
14
0.64
4
4/21/20 22:41
BRF
Styrene
ND
0.20
0.12
ND
0.85
0.53
4
4/21/20 22:41
BRF
1,1,2,2-Tetrachloroethane
ND
0.20
0.089
ND
1.4
0.61
4
4/21/20 22:41
BRF
Page 14 of 37

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Project Location: Durham, NC
Sample Description/Location:
Work Order: 20DO624
Date Received: 4/15/2020
Sub Description/Location:
Initial Vacuum(in Hg): -27
Field Sample #: Duplicate
Canister ID: 2316
Final Vacuum(in Hg): -3
Sample ID: 20DO624-06
Canister Size: 1 liter
Receipt Vacuum(in Hg): -4.7
Sample Matrix: Sub Slab
Flow Controller ID: 4348
Flow Controller Type: Fixed -Orifice
Sampled: 4/13/2020 16:01
Sample Type: 10 min
Flow Controller Calibration
RPD Pre and Post -Sampling:
Analyte
Results
ppbv
RL
EPA TO-15
MDL
Flag/Qual
Results
ug/m3
RL
MDL
Dilution
Date/Time
Analyzed
Analyst
Tetrachloroethylene
100
0.20
0.11
680
1.4
0.75
4
4/21/20 22:41
BRF
Tetrahydrofuran
0.29
0.20
0.20
0.86
0.59
0.59
4
4/21/20 22:41
BRF
Toluene
1.5
0.20
0.10
5.7
0.75
0.39
4
4/21/20 22:41
BRF
1,2,4-Trichlorobenzene
ND
0.20
0.14
Z-01
ND
1.5
1.0
4
4/21/20 22:41
BRF
1, 1, 1 -Trichloroethane
ND
0.20
0.075
ND
1.1
0.41
4
4/21/20 22:41
BRF
1,1,2-Trichloroethane
ND
0.20
0.082
ND
1.1
0.45
4
4/21/20 22:41
BRF
Trichloroethylene
21
0.20
0.081
110
1.1
0.43
4
4/21/20 22:41
BRF
Trichlorofluoromethane (Freon 11)
0.36
0.80
0.15
J
2.0
4.5
0.85
4
4/21/20 22:41
BRF
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)
0.20
0.80
0.15
J
1.6
6.1
1.2
4
4/21/20 22:41
BRF
1,2,4-Trimethylbenzene
ND
0.20
0.13
ND
0.98
0.63
4
4/21/20 22:41
BRF
1,3,5-Trimethylbenzene
ND
0.20
0.13
ND
0.98
0.62
4
4/21/20 22:41
BRF
Vinyl Acetate
ND
4.0
0.12
ND
14
0.44
4
4/21/20 22:41
BRF
Vinyl Chloride
ND
0.20
0.13
ND
0.51
0.32
4
4/21/20 22:41
BRF
m&p-Xylene
0.73
0.40
0.23
3.2
1.7
1.00
4
4/21/20 22:41
BRF
o-Xylene
0.33
0.20
0.12
1.4
0.87
0.54
4
4/21/20 22:41
BRF
Surrogates % Recovery % REC Limits
4-Bromofluorobenzene (1) 95.8 70-130 4/21/20 22:41
Page 15 of 37

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
Sample Extraction
Data
Prep Method: TO-15 Prep -EPA TO-15
Pre-Dil
Pre-Dil
Default
Actual
Pressure
Pre
Initial
Final
Injection
Injection
Lab Number [Field ID]
Batch
Dilution
Dilution
mL
mL
mL
mL
Date
20DO624-01 [SGS-1]
B256736
1.5
1
N/A
1000
400
150
04/21/20
20DO624-02 [SGS-2]
B256736
1.5
1
N/A
1000
400
150
04/21/20
20DO624-03 [SGS-3]
B256736
1.5
1
N/A
1000
400
150
04/21/20
20DO624-04 [SGS-4]
B256736
1.5
1
N/A
1000
400
150
04/21/20
20DO624-05 [SGS-5]
B256736
1.5
1
N/A
1000
400
150
04/21/20
20DO624-06 [Duplicate]
B256736
1.5
1
N/A
1000
400
150
04/21/20
Prep Method: TO-15 Prep -EPA TO-15
Pre-Dil
Pre-Dil
Default
Actual
Pressure
Pre
Initial
Final
Injection
Injection
Lab Number [Field ID]
Batch
Dilution
Dilution
mL
mL
mL
mL
Date
20130624-04RE1 [SGS-4]
B256833
1.5
1
N/A
1000
400
30
04/22/20
20D0624-04RE2 [SGS-4]
B256833
1.5
1
N/A
1000
400
10
04/22/20
20DO624-05RE1 [SGS-5]
B256833
1.5
1
N/A
1000
400
30
04/22/20
Page 16 of 37

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
QUALITY CONTROL
Air Toxics by EPA Compendium Methods - Quality Control
ppbv ug/m3 Spike Level Source %REC RPD
malyte Results RL Results RL ppbv Result %REC Limits RPD Limit Flag/Qua
Batch B256736 - TO-15 Prep
Blank (B256736-BLK1)
Prepared & Analyzed: 04/21/20
Acetone
ND
0.80
Benzene
ND
0.020
Benzyl chloride
ND
0.020
Bromodichloromethane
ND
0.020
Bromoform
ND
0.020
Bromomethane
ND
0.020
1,3-Butadiene
ND
0.020
2-Butanone (MEK)
ND
0.80
Carbon Disulfide
ND
0.20
Carbon Tetrachloride
ND
0.020
Chlorobenzene
ND
0.020
Chloroethane
ND
0.020
Chloroform
ND
0.020
Chloromethane
ND
0.040
Cyclohexane
ND
0.020
Dibromochloromethane
ND
0.020
1,2-Dibromoethane (EDB)
ND
0.020
1,2-Dichlorobenzene
ND
0.020
1,3-Dichlorobenzene
ND
0.020
114-Dichlorobenzene
ND
0.020
Dichlorodifluoromethane (Freon 12)
ND
0.020
1,1-Dichloroethane
ND
0.020
1,2-Dichloroethane
ND
0.020
1,1-Dichloroethylene
ND
0.020
cis-1,2-Dichloroethylene
ND
0.020
trans-1,2-Dichloroethylene
ND
0.020
1,2-Dichloropropane
ND
0.020
cis- 1,3 -Dichloropropene
ND
0.020
trans- l,3-Dichloropropene
ND
0.020
1,2-Dichloro- 1, 1,2,2-tetrafluoroethane
ND
0.020
(Freon 114)
1,4-Dioxane
ND
0.20
Ethanol
ND
0.80
Ethyl Acetate
ND
0.020
Ethylbenzene
ND
0.020
4-Ethyltoluene
ND
0.020
Heptane
ND
0.020
Hexachlorobutadiene
ND
0.020
Z-01
Hexane
ND
0.80
2-Hexanone (MBK)
ND
0.020
Isopropanol
ND
0.80
Methyl tert-Butyl Ether (MTBE)
ND
0.020
Methylene Chloride
ND
0.20
4-Methyl-2-pentanone (MIBK)
ND
0.020
Naphthalene
ND
0.020
Z-01
Propene
ND
0.80
Styrene
ND
0.020
Page 17 of 37

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
QUALITY CONTROL
Air Toxics by EPA Compendium Methods - Quality Control
ppbv ug/m3 Spike Level Source %REC RPD
\nalyte Results RL Results RL ppbv Result %REC Limits RPD Limit Flag/Qua]
Batch B256736 - TO-15 Prep
Blank (B256736-BLKI)
Prepared & Analyzed: 04/21/20
1,1,2,2-Tetrachloroethane
ND
0.020
Tetrachloroethylene
ND
0.020
Tetrahydrofuran
ND
0.020
Toluene
ND
0.020
1,2,4-Trichlorobenzene
ND
0.020 Z-01
1, 1, 1 -Trichloroethane
ND
0.020
1,1,2-Trichloroethane
ND
0.020
Trichloroethylene
ND
0.020
Trichlorofluoromethane (Freon 11)
ND
0.080
1, 1,2-Trichloro- 1,2,2-trifluoroethane (Freon
ND
0.080
113)
1,2,4-Trimethylbenzene
ND
0.020
1,3,5-Trimethylbenzene
ND
0.020
Vinyl Acetate
ND
0.40
Vinyl Chloride
ND
0.020
m&p-Xylene
ND
0.040
o-Xylene
ND
0.020
Surrogate: 4-Bromofluorobenzene (1)
LCS (B256736-BS1)
7.32
8.00 91.5
Prepared & Analyzed: 04/21/20
70-130
Acetone
6.06
5.00
121
70-130
Benzene
3.95
5.00
79.0
70-130
Benzyl chloride
3.90
5.00
78.0
70-130
Bromodichloromethane
4.03
5.00
80.6
70-130
Bromoform
4.45
5.00
89.1
70-130
Bromomethane
5.20
5.00
104
70-130
1,3-Butadiene
4.92
5.00
98.5
70-130
2-Butanone (MEK)
4.61
5.00
92.2
70-130
Carbon Disulfide
4.05
5.00
80.9
70-130
Carbon Tetrachloride
4.11
5.00
82.2
70-130
Chlorobenzene
4.09
5.00
81.7
70-130
Chloroethane
5.00
5.00
100
70-130
Chloroform
3.85
5.00
77.1
70-130
Chloromethane
4.60
5.00
92.0
70-130
Cyclohexane
3.64
5.00
72.8
70-130
Dibromochloromethane
4.40
5.00
88.1
70-130
1,2-Dibromoethane (EDB)
4.18
5.00
83.5
70-130
1,2-Dichlorobenzene
3.96
5.00
79.2
70-130
1,3-Dichlorobenzene
4.14
5.00
82.8
70-130
1,4-Dichlorobenzene
4.02
5.00
80.4
70-130
Dichlorodifluoromethane (Freon 12)
4.50
5.00
89.9
70-130
1,1-Dichloroethane
3.97
5.00
79.4
70-130
1,2-Dichloroethane
3.88
5.00
77.7
70-130
1, 1 -Dichloroethylene
4.11
5.00
82.1
70-130
cis-1,2-Dichloroethylene
3.88
5.00
77.5
70-130
trans-1,2-Dichloroethylene
3.96
5.00
79.1
70-130
1,2-Dichloropropane
4.18
5.00
83.6
70-130
Page 18 of 37

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
QUALITY CONTROL
Air Toxics by EPA Compendium Methods - Quality Control
ppbv ug/m3 Spike Level Source %REC RPD
\nalyte Results RL Results RL ppbv Result %REC Limits RPD Limit Flag/Qua]
Batch B256736 - TO-15 Prep
LCS (B256736-BS1)
Prepared & Analyzed: 04/21/20
cis-1,3-Dichloropropene
3.72
5.00
74.4
70-130
trans-1,3-Dichloropropene
4.02
5.00
80.3
70-130
1,2-Dichloro- 1, 1,2,2-tetrafluoroethane
4.74
5.00
94.9
70-130
(Freon 114)
1,4-Dioxane
4.44
5.00
88.9
70-130
Ethanol
6.71
5.00
134
* 70-130
Z-01
Ethyl Acetate
3.81
5.00
76.2
70-130
Ethylbenzene
4.11
5.00
82.2
70-130
4-Ethyltoluene
4.15
5.00
82.9
70-130
Heptane
4.12
5.00
82.4
70-130
Hexachlorobutadiene
3.24
5.00
64.8
* 70-130
Z-01
Hexane
5.21
5.00
104
70-130
2-Hexanone (MBK)
5.65
5.00
113
70-130
Isopropanol
5.58
5.00
112
70-130
Methyl tert-Butyl Ether (MTBE)
3.63
5.00
72.6
70-130
Methylene Chloride
4.53
5.00
90.6
70-130
4-Methyl-2-pentanone (MIBK)
5.05
5.00
101
70-130
Naphthalene
3.38
5.00
67.6
* 70-130
Z-01
Propene
4.39
5.00
87.7
70-130
Styrene
4.14
5.00
82.8
70-130
1,1,2,2-Tetrachloroethane
4.08
5.00
81.6
70-130
Tetrachloroethylene
3.95
5.00
79.0
70-130
Tetrahydrofuran
4.36
5.00
87.3
70-130
Toluene
4.24
5.00
84.8
70-130
1,2,4-Trichlorobenzene
3.34
5.00
66.7
* 70-130
Z-01
1, 1, 1 -Trichloroethane
3.74
5.00
74.9
70-130
1,1,2-Trichloroethane
4.21
5.00
84.2
70-130
Trichloroethylene
3.96
5.00
79.3
70-130
Trichlorofluoromethane (Freon 11)
5.68
5.00
114
70-130
1, 1,2-Trichloro- 1,2,2-trifluoroethane (Freon
3.92
5.00
78.4
70-130
113)
1,2,4-Trimethylbenzene
4.01
5.00
80.2
70-130
1,3,5-Trimethylbenzene
4.07
5.00
81.4
70-130
Vinyl Acetate
5.00
5.00
99.9
70-130
Vinyl Chloride
4.83
5.00
96.6
70-130
m&p-Xylene
8.41
10.0
84.1
70-130
o-Xylene
4.17
5.00
83.3
70-130
Surrogate: 4-Bromofluorobenzene (1) 7.61 8.00 95.2 70-130
Page 19 of 37

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
QUALITY CONTROL
Air Toxics by EPA Compendium Methods - Quality Control
ppbv ug/m3 Spike Level Source %REC RPD
knalyte Results RL Results RL ppbv Result %REC Limits RPD Limit Flag/Qual
Batch B256736 - TO-15 Prep
Duplicate (B256736-DUPI)
Source: 20DO624-02
Prepared & Analyzed: 04/21/20
Acetone
50
8.0
120
19
51
1.07
25
Benzene
0.20
0.20
0.64
0.64
0.20
0.00
25
Benzyl chloride
ND
0.20
ND
1.0
ND
25
Bromodichloromethane
ND
0.20
ND
1.3
ND
25
Bromoform
ND
0.20
ND
2.1
ND
25
Bromomethane
ND
0.20
ND
0.78
ND
25
1,3-Butadiene
ND
0.20
ND
0.44
ND
25
2-Butanone (MEK)
2.6
8.0
7.6
24
2.6
1.70
25
J
Carbon Disulfide
ND
2.0
ND
6.2
ND
25
Carbon Tetrachloride
ND
0.20
ND
1.3
ND
25
Chlorobenzene
ND
0.20
ND
0.92
ND
25
Chloroethane
ND
0.20
ND
0.53
ND
25
Chloroform
0.19
0.20
0.94
0.98
0.20
6.06
25
J
Chloromethane
ND
0.40
ND
0.83
ND
25
Cyclohexane
ND
0.20
ND
0.69
ND
25
Dibromochloromethane
ND
0.20
ND
1.7
ND
25
1,2-Dibromoethane (EDB)
ND
0.20
ND
1.5
ND
25
1,2-Dichlorobenzene
ND
0.20
ND
1.2
ND
25
1,3-Dichlorobenzene
0.16
0.20
0.94
1.2
0.13
16.7
25
J
1,4-Dichlorobenzene
ND
0.20
ND
1.2
ND
25
Dichlorodifluoromethane(Freon 12)
52
0.20
260
0.99
56
7.05
25
1,1-Dichloroethane
ND
0.20
ND
0.81
ND
25
1,2-Dichloroethane
ND
0.20
ND
0.81
ND
25
1,1-Dichloroethylene
ND
0.20
ND
0.79
ND
25
cis-1,2-Dichloroethylene
ND
0.20
ND
0.79
ND
25
trans-1,2-Dichloroethylene
ND
0.20
ND
0.79
ND
25
1,2-Dichloropropane
ND
0.20
ND
0.92
ND
25
cis-1,3-Dichloropropene
ND
0.20
ND
0.91
ND
25
trans- 1, 3 -Dichloropropene
ND
0.20
ND
0.91
ND
25
1,2-Dichloro- 1, 1,2,2-tetrafluoroethane
ND
0.20
ND
1.4
ND
25
(Freon 114)
1,4-Dioxane
ND
2.0
ND
7.2
ND
25
Ethanol
140
8.0
260
15
140
0.752
25
Z-01
Ethyl Acetate
ND
0.20
ND
0.72
ND
25
Ethylbenzene
0.36
0.20
1.5
0.87
0.34
3.43
25
4-Ethyltoluene
0.16
0.20
0.79
0.98
0.16
0.00
25
J
Heptane
ND
0.20
ND
0.82
ND
25
Hexachlorobutadiene
ND
0.20
ND
2.1
ND
25
Z-01
Hexane
ND
8.0
ND
28
ND
25
2-Hexanone (MBK)
ND
0.20
ND
0.82
ND
25
Isopropanol
4.3
8.0
11
20
4.5
3.00
25
J
Methyl tert-Butyl Ether (MTBE)
ND
0.20
ND
0.72
ND
25
Methylene Chloride
ND
2.0
ND
6.9
ND
25
4-Methyl-2-pentanone (MIBK)
ND
0.20
ND
0.82
ND
25
Naphthalene
ND
0.20
ND
1.0
ND
25
Z-01
Propene
ND
8.0
ND
14
ND
25
Styrene
0.27
0.20
1.2
0.85
0.28
1.46
25
Page 20 of 37

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
QUALITY CONTROL
Air Toxics by EPA Compendium Methods - Quality Control
ppbv ug/m3 Spike Level Source %REC RPD
\nalyte Results RL Results RL ppbv Result %REC Limits RPD Limit Flag/Qua]
Batch B256736 - TO-15 Prep
Duplicate (B256736-DUPI)
Source: 20DO624-02
Prepared & Analyzed: 04/21/20
1,1,2,2-Tetrachloroethane
ND
0.20
ND
1.4
ND
25
Tetrachloroethylene
0.25
0.20
1.7
1.4
0.27
9.23
25
Tetrahydrofuran
ND
0.20
ND
0.59
0.37
25
Toluene
1.0
0.20
3.8
0.75
0.99
0.402
25
1,2,4-Trichlorobenzene
ND
0.20
ND
1.5
ND
25 Z-01
1, 1, 1 -Trichloroethane
ND
0.20
ND
1.1
ND
25
1,1,2-Trichloroethane
ND
0.20
ND
1.1
ND
25
Trichloroethylene
ND
0.20
ND
1.1
ND
25
Trichlorofluoromethane (Freon 11)
1.0
0.80
5.8
4.5
1.1
3.04
25
1, 1,2-Trichloro- 1,2,2-trifluoroethane (Freon
0.18
0.80
1.4
6.1
0.18
0.00
25 J
113)
1,2,4-Trimethylbenzene
ND
0.20
ND
0.98
ND
25
1,3,5-Trimethylbenzene
0.16
0.20
0.81
0.98
0.17
4.76
25 J
Vinyl Acetate
ND
4.0
ND
14
ND
25
Vinyl Chloride
ND
0.20
ND
0.51
ND
25
m&p-Xylene
1.5
0.40
6.3
1.7
1.4
1.38
25
o-Xylene
0.60
0.20
2.6
0.87
0.58
2.03
25
Surrogate: 4-Bromofluorobenzene (1) 7.41 8.00 92.7 70-130
Batch B256833 - TO-15 Prep
Blank (B256833-BLKI)
Prepared & Analyzed: 04/22/20
Acetone
ND
0.80
Benzene
ND
0.020
Benzyl chloride
ND
0.020
Bromodichloromethane
ND
0.020
Bromoform
ND
0.020
Bromomethane
ND
0.020
1,3-Butadiene
ND
0.020
2-Butanone (MEK)
ND
0.80
Carbon Disulfide
ND
0.20
Carbon Tetrachloride
ND
0.020
Chlorobenzene
ND
0.020
Chloroethane
ND
0.020
Chloroform
ND
0.020
Chloromethane
ND
0.040
Cyclohexane
ND
0.020 L-W
Dibromochloromethane
ND
0.020
1,2-Dibromoethane (EDB)
ND
0.020
1,2-Dichlorobenzene
ND
0.020
1,3-Dichlorobenzene
ND
0.020
1,4-Dichlorobenzene
ND
0.020
Dichlorodifluoromethane (Freon 12)
ND
0.020
1,1-Dichloroethane
ND
0.020
1,2-Dichloroethane
ND
0.020
1, 1 -Dichloroethylene
ND
0.020
cis-1,2-Dichloroethylene
ND
0.020
Page 21 of 37

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
QUALITY CONTROL
Air Toxics by EPA Compendium Methods - Quality Control
ppbv ug/m3 Spike Level Source %REC RPD
Analyte Results RL Results RL ppbv Result %REC Limits RPD Limit Flag/Qual
Batch B256833 - TO-15 Prep
Blank (B256833-BLKI)
Prepared & Analyzed: 04/22/20
trans-1,2-Dichloroethylene
ND
0.020
1,2-Dichloropropane
ND
0.020
cis- 1,3 -Dichloropropene
ND
0.020
trans- l,3-Dichloropropene
ND
0.020
1,2-Dichloro- 1, 1,2,2-tetrafluoroethane
ND
0.020
(Freon 114)
1,4-Dioxane
ND
0.20
Ethanol
0.43
0.80 J
Ethyl Acetate
ND
0.020
Ethylbenzene
ND
0.020
4-Ethyltoluene
ND
0.020
Heptane
ND
0.020
Hexachlorobutadiene
ND
0.020 Z-01
Hexane
ND
0.80
2-Hexanone (MBK)
ND
0.020
Isopropanol
ND
0.80
Methyl tert-Butyl Ether (MTBE)
ND
0.020
Methylene Chloride
ND
0.20
4-Methyl-2-pentanone (MIBK)
ND
0.020
Naphthalene
ND
0.020 Z-01
Propene
ND
0.80
Styrene
ND
0.020
1,1,2,2-Tetrachloroethane
ND
0.020
Tetrachloroethylene
ND
0.020
Tetrahydrofuran
ND
0.020
Toluene
ND
0.020
1,2,4-Trichlorobenzene
ND
0.020 Z-0I
1, 1, 1 -Trichloroethane
ND
0.020
1,1,2-Trichloroethane
ND
0.020
Tichloroethylene
ND
0.020
Trichlorofluoromethane (Freon 11)
ND
0.080
1,1,2-Tichloro-1,2,2-trifluoroethane (Freon
ND
0.080
113)
1,2,4-Trimethylbenzene
ND
0.020
1,3,5-Trimethylbenzene
ND
0.020
Vinyl Acetate
ND
0.40
Vinyl Chloride
ND
0.020
m&p-Xylene
ND
0.040
o-Xylene
ND
0.020
Surrogate: 4-Bromofluorobenzene (1) 7.39 8.00 92.4 70-130
Page 22 of 37

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
QUALITY CONTROL
Air Toxics by EPA Compendium Methods - Quality Control
ppbv ug/m3 Spike Level Source %REC RPD
\nalyte Results RL Results RL ppbv Result %REC Limits RPD Limit Flag/Qua]
Batch B256833 - TO-15 Prep
LCS (B256833-BS1)
Prepared & Analyzed: 04/22/20
Acetone
6.21
5.00
124
70-130
Benzene
3.70
5.00
74.1
70-130
Benzyl chloride
3.75
5.00
75.0
70-130
Bromodichloromethane
3.77
5.00
75.4
70-130
Bromoform
4.35
5.00
87.0
70-130
Bromomethane
5.21
5.00
104
70-130
1,3-Butadiene
4.86
5.00
97.2
70-130
2-Butanone (MEK)
4.58
5.00
91.7
70-130
Carbon Disulfide
3.93
5.00
78.5
70-130
Carbon Tetrachloride
3.86
5.00
77.3
70-130
Chlorobenzene
3.91
5.00
78.2
70-130
Chloroethane
5.04
5.00
101
70-130
Chloroform
3.77
5.00
75.3
70-130
Chloromethane
4.52
5.00
90.4
70-130
Cyclohexane
3.48
5.00
69.6 *
70-130
L-03
Dibromochloromethane
4.23
5.00
84.7
70-130
1,2-Dibromoethane (EDB)
3.97
5.00
79.4
70-130
1,2-Dichlorobenzene
3.94
5.00
78.7
70-130
1,3-Dichlorobenzene
4.07
5.00
81.4
70-130
1,4-Dichlorobenzene
3.99
5.00
79.8
70-130
Dichlorodifluoromethane(Freon 12)
4.36
5.00
87.1
70-130
1,1-Dichloroethane
3.86
5.00
77.2
70-130
1,2-Dichloroethane
3.70
5.00
74.0
70-130
1,1-Dichloroethylene
3.94
5.00
78.7
70-130
cis-1,2-Dichloroethylene
3.74
5.00
74.8
70-130
trans-1,2-Dichloroethylene
3.79
5.00
75.9
70-130
1,2-Dichloropropane
3.95
5.00
79.0
70-130
cis-1,3-Dichloropropene
3.51
5.00
70.2
70-130
trans- 1, 3 -Dichloropropene
3.76
5.00
75.2
70-130
1,2-Dichloro- 1, 1,2,2-tetrafluoroethane
4.81
5.00
96.3
70-130
(Freon 114)
1,4-Dioxane
4.12
5.00
82.3
70-130
Ethanol
6.66
5.00
133 *
70-130
Z-01
Ethyl Acetate
3.76
5.00
75.2
70-130
Ethylbenzene
3.89
5.00
77.8
70-130
4-Ethyltoluene
3.96
5.00
79.3
70-130
Heptane
3.83
5.00
76.5
70-130
Hexachlorobutadiene
3.15
5.00
63.1 *
70-130
Z-01
Hexane
4.97
5.00
99.4
70-130
2-Hexanone (MBK)
5.28
5.00
106
70-130
Isopropanol
5.71
5.00
114
70-130
Methyl tert-Butyl Ether (MTBE)
3.62
5.00
72.4
70-130
Methylene Chloride
4.34
5.00
86.8
70-130
4-Methyl-2-pentanone (MIBK)
4.79
5.00
95.8
70-130
Naphthalene
3.19
5.00
63.7 *
70-130
Z-01
Propene
4.19
5.00
83.8
70-130
Styrene
3.98
5.00
79.7
70-130
Page 23 of 37

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
QUALITY CONTROL
Air Toxics by EPA Compendium Methods - Quality Control
ppbv ug/m3 Spike Level Source %REC RPD
.nalyte Results RL Results RL ppbv Result %REC Limits RPD Limit Flag/Qua
Batch B256833 - TO-15 Prep
LCS (B256833-BS1)
Prepared & Analyzed: 04/22/20
1,1,2,2-Tetrachloroethane
3.91
5.00
78.1
70-130
Tetrachloroethylene
3.88
5.00
77.7
70-130
Tetrahydrofuran
4.27
5.00
85.5
70-130
Toluene
4.02
5.00
80.5
70-130
1,2,4-Trichlorobenzene
3.24
5.00
64.9
* 70-130 Z-01
1, 1, 1 -Trichloroethane
3.54
5.00
70.8
70-130
1,1,2-Trichloroethane
4.02
5.00
80.5
70-130
Trichloroethylene
3.69
5.00
73.8
70-130
Trichlorofluoromethane (Freon 11)
5.81
5.00
116
70-130
1, 1,2-Trichloro- 1,2,2-trifluoroethane (Freon
3.83
5.00
76.6
70-130
113)
1,2,4-Trimethylbenzene
3.91
5.00
78.2
70-130
1,3,5-Trimethylbenzene
3.93
5.00
78.7
70-130
Vinyl Acetate
4.87
5.00
97.4
70-130
Vinyl Chloride
4.77
5.00
95.5
70-130
m&p-Xylene
7.91
10.0
79.1
70-130
o-Xylene
3.92
5.00
78.5
70-130
Surrogate: 4-Bromofluorobenzene (1) 7.78 8.00 97.3 70-130
Page 24 of 37

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
Note: Blank Subtraction is not performed unless otherwise noted
FLAG/QUALIFIER SUMMARY
*
QC result is outside of established limits.
t
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
LCS 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
% REC Percent Recovery
ND Not Detected
N/A Not Applicable
DL Detection Limit
NC Not Calculated
LFB/LCS Lab Fortified Blank/Lab Control Sample
ORP Oxidation -Reduction Potential
wet Not dry weight corrected
% wt Percent weight
Kg Kilogram
g Gram
mg Milligram
µg Microgram
ng Nanogram
L Liter
mL Milliliter
µL Microliter
m3 Cubic Meter
EPH Extractable Petroleum Hydrocarbons
VPH Volatile Petroleum Hydrocarbons
APH Air Petroleum Hydrocarbons
FID Flame Ionization Detector
PID Photo Ionization Detector
Percent recoveries and relative percent differences (RPDs) are determined by the software using values in the
calculation which have not been rounded.
J Detected but below the Reporting Limit (lowest calibration standard); therefore, result is an estimated
concentration (CLP J-Flag).
L-03 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.
Z-01 Compound fails the method requirement of 70-130% recovery for the LCS. Is classified by the lab as a difficult
compound and passes the in house limits of 50-150%.
ANALYST
RAP Raisa A. Petraitis
STATION PDF Management Station
KKM Kerry K. McGee
BRF Brittany R. Fisk
Page 25 of 37

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
INTERNAL STANDARD AREAAND RT SUMMARY
EPA TO-15
Internal Standard
Response
RT
Reference
Response
Reference
RT
Area %
Area o/
Limits
RT Diff
RT Diff
Limit
Q
Initial Cal Check (SO41952-ICV1) Lab File ID: G1930117.13 Analyzed: 10/28/19 23:11
Bromochloromethane (1)
392547
8.54
392415
8.54
100
60 - 140
0.0000
+/-0.50
1,4-Difluorobenzene (1)
984411
10.314
974698
10.32
101
60 - 140
-0.0060
+/-0.50
Chlorobenzene-d5 (1)
925298
14.691
911790
14.691
101
60-140
0.0000
+/-0.50
INTERNAL STANDARD AREAAND RT SUMMARY
EPA TO-15
Internal Standard
Response
RT
Reference
Response
Reference
RT
Area %
Area o/
Limits
RT Diff
RT Diff
Limit
Q
Calibration Check (SO47830-CCV1) Lab File ID: G2011204.13 Analyzed: 04/21/20 11:28
Bromochloromethane (1)
325284
8.527
392415
8.54
83
60 - 140
-0.0130
+/-0.50
1,4-Difluorobenzene (1)
736041
10.301
974698
10.32
76
60 - 140
-0.0190
+/-0.50
Chlorobenzene-d5 (1)
641441
14.685
911790
14.691
70
60-140
-0.0060
+/-0.50
LCS (B256736-BS1 ) Lab File ID: G2011205.13 Analyzed: 04/21/20 12:07
Bromochloromethane (1)
327555
8.528
325284
8.527
101
60 - 140
0.0010
+/-0.50
1,4-Difluorobenzene (1)
738213
10.308
736041
10.301
100
60 - 140
0.0070
+/-0.50
Chlorobenzene-d5(1)
650806
14.679
641441
14.685
101
60-140
-0.0060
+/-0.50
Blank (B256736-BLK1) Lab File ID: G2011211.13 Analyzed: 04/21/20 16:41
Bromochloromethane (1)
315657
8.527
325284
8.527
97
60 - 140
0.0000
+/-0.50
1,4-Difluorobenzene(1)
684950
10.307
736041
10.301
93
60-140
0.0060
+/-0.50
Chlorobenzene-d5 (1)
597111
14.679
641441
14.685
93
60-140
-0.0060
+/-0.50
SGS-1 (20D0624-01) Lab File ID: G2011212.13 Analyzed: 04/21/20 17:21
Bromochloromethane (1)
307085
8.527
325284
8.527
94
60 - 140
0.0000
+/-0.50
1,4-Difluorobenzene(1)
701254
10.301
736041
10.301
95
60-140
0.0000
+/-0.50
Chlorobenzene-d5(1)
608230
14.679
641441
14.685
95
60-140
-0.0060
+/-0.50
SGS-2 (20130624-02 ) Lab File ID: G2011214.13 Analyzed: 04/21/20 18:40
Bromochloromethane (1)
322140
8.527
325284
8.527
99
60 - 140
0.0000
+/-0.50
1,4-Difluorobenzene(1)
721408
10.308
736041
10.301
98
60-140
0.0070
+/-0.50
Chlorobenzene-d5(1)
632683
14.679
641441
14.685
99
60-140
-0.0060
+/-0.50
Duplicate (B256736-DUP1) Lab File ID: G2011215.13 Analyzed: 04/21/20 19:21
Bromochloromethane (1)
319130
8.527
325284
8.527
98
60 - 140
0.0000
+/-0.50
1,4-Difluorobenzene(1)
713175
10.308
736041
10.301
97
60-140
0.0070
+/-0.50
Chlorobenzene-d5(1)
623266
14.679
641441
14.685
97
60-140
-0.0060
+/-0.50
SGS-3 (20130624-03 ) Lab File ID: G2011216.1) Analyzed: 04/21/20 20:01
Bromochloromethane (1)
317115
8.527
325284
8.527
97
60 - 140
0.0000
+/-0.50
1,4-Difluorobenzene(1)
717925
10.308
736041
10.301
98
60-140
0.0070
+/-0.50
Chlorobenzene-d5(1)
622735
14.679
641441
14.685
97
60-140
-0.0060
+/-0.50
Page 26 of 37

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
INTERNAL STANDARD AREAAND RT SUMMARY
EPA TO-15
Internal Standard
Response
RT
Reference
Response
Reference
RT
Area %
Area %
Limits
RT Diff
RT Diff
Limit
Q
SGS-4 (20D0624-04) Lab File ID: G2011217.D Analyzed: 04/21/20 20:41
Bromochloromethane (1)
316595
8.527
325284
8.527
97
60 - 140
0.0000
+/-0.50
1,4-Difluorobenzene (1)
756595
10.307
736041
10.301
103
60 - 140
0.0060
+/-0.50
Chlorobenzene-d5(1)
695448
14.679
641441
14.685
108
60-140
-0.0060
+/-0.50
SGS-5 (20D0624-05) Lab File ID: G2011219.D Analyzed: 04/21/20 22:01
Bromochloromethane (1)
306598
8.527
325284
8.527
94
60 - 140
0.0000
+/-0.50
1,4-Difluorobenzene (1)
786422
10.307
736041
10.301
107
60 - 140
0.0060
+/-0.50
Chlorobenzene-d5(1)
690853
14.679
641441
14.685
108
60-140
-0.0060
+/-0.50
Duplicate (20D0624-06) Lab File ID: G2011220.D Analyzed: 04/21/20 22:41
Bromochloromethane (1)
305958
8.528
325284
8.527
94
60 - 140
0.0010
+/-0.50
1,4-Difluorobenzene(1)
788114
10.308
736041
10.301
107
60-140
0.0070
+/-0.50
Chlorobenzene-d5(1)
686372
14.679
641441
14.685
107
60-140
-0.0060
+/-0.50
INTERNAL STANDARD AREAAND RT SUMMARY
EPA TO-15
Internal Standard
Response
RT
Reference
Response
Reference
RT
Area %
Area %
Limits
RT Diff
RT Diff
Limit
Q
Calibration Check (SO47874-CCV1) Lab File ID: G2011304.D Analyzed: 04/22/20 13:03
Bromochloromethane (1)
301257
8.528
392415
8.54
77
60 - 140
-0.0120
+/-0.50
1,4-Difluorobenzene(1)
720119
10.308
974698
10.32
74
60-140
-0.0120
+/-0.50
Chlorobenzene-d5 (1)
629246
14.679
911790
14.691
69
60 - 140
-0.0120
+/-0.50
LCS (B256833-BS1) Lab File ID: G2011305.D Analyzed: 04/22/20 13:43
Bromochloromethane (1)
306643
8.527
301257
8.528
102
60 - 140
-0.0010
+/-0.50
1,4-Difluorobenzene(1)
721017
10.308
720119
10.308
100
60-140
0.0000
+/-0.50
Chlorobenzene-d5(1)
635713
14.679
629246
14.679
101
60-140
0.0000
+/-0.50
Blank (B256833-BLK1) Lab File ID: G2011308.D Analyzed: 04/22/20 15:54
Bromochloromethane (1)
288775
8.528
301257
8.528
96
60 - 140
0.0000
+/-0.50
1,4-Difluorobenzene(1)
656166
10.302
720119
10.308
91
60-140
-0.0060
+/-0.50
Chlorobenzene-d5(1)
564870
14.679
629246
14.679
90
60-140
0.0000
+/-0.50
SGS-4 (20D0624-04RE1) Lab File ID: G20113IO.D Analyzed: 04/22/20 17:12
Bromochloromethane (1)
287068
8.527
301257
8.528
95
60 - 140
-0.0010
+/-0.50
1,4-Difluorobenzene(1)
660100
10.307
720119
10.308
92
60-140
-0.0010
+/-0.50
Chlorobenzene-d5(1)
591329
14.685
629246
14.679
94
60-140
0.0060
+/-0.50
SGS-4 (20D0624-04RE2) Lab File ID: G20113I LD Analyzed: 04/22/20 17:51
Bromochloromethane (1)
295289
8.527
301257
8.528
98
60 - 140
-0.0010
+/-0.50
1,4-Difluorobenzene(1)
659347
10.307
720119
10.308
92
60-140
-0.0010
+/-0.50
Chlorobenzene-d5(1)
579426
14.685
629246
14.679
92
60-140
0.0060
+/-0.50
Page 27 of 37

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
INTERNAL STANDARD AREAAND RT SUMMARY
EPA TO-15
Internal Standard
Response
RT
Reference
Response
Reference
RT
Area %
Area %
Limits
RT Diff
RT Diff
Limit
Q
SGS-5 (20D0624-05RE1) Lab File ID: G2011312.D Analyzed: 04/22/20 18:30
Bromochloromethane (1)
293312
8.527
301257
8.528
97
60 - 140
-0.0010
+/-0.50
1,4-Difluorobenzene(1)
647753
10.307
720119
10.308
90
60-140
-0.0010
+/-0.50
Chlorobenzene-d5(1)
565624
14.685
629246
14.679
90
60-140
0.0060
+/-0.50
Page 28 of 37

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street' East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
CONTINUING CALIBRATION CHECK
EPA TO-15
S047830-CCV 1
COMPOUND
TYPE
CONC. (ppbv)
RESPONSE FACTOR
% DIFF / DRIFT
STD
CCV
ICAL
CCV
MIN (#)
CCV
LIMIT (#)
Acetone
A
5.00
6.06
0.9038238
1.094984
21.2
30
Benzene
A
5.00
4.06
1.014039
0.8229324
-18.8
30
Benzyl chloride
A
5.00
4.30
1.098046
0.9443961
-14.0
30
Bromodichloromethane
A
5.00
4.21
0.7248413
0.6103943
-15.8
30
Bromoform
A
5.00
4.83
0.4798376
0.4635588
-3.4
30
Bromomethane
A
5.00
5.35
0.5754725
0.6156048
7.0
30
1,3-Butadiene
A
5.00
5.03
0.5228144
0.5254977
0.5
30
2-Butanone (MEK)
A
5.00
4.69
1.4656
1.374405
-6.2
30
Carbon Disulfide
A
5.00
4.05
2.135681
1.729511
-19.0
30
Carbon Tetrachloride
A
5.00
4.27
0.5401362
0.4608265
-14.7
30
Chlorobenzene
A
5.00
4.35
0.8895419
0.7731417
-13.1
30
Chloroethane
A
5.00
5.12
0.3436145
0.3521108
2.5
30
Chloroform
A
5.00
3.96
1.593363
1.260471
-20.9
30
Chloromethane
A
5.00
4.74
0.6540095
0.6204597
-5.1
30
Cyclohexane
A
5.00
3.79
0.4352577
0.3302946
-24.1
30
Dibromochloromethane
A
5.00
4.72
0.5939169
0.5608946
-5.6
30
1,2-Dibromoethane (EDB)
A
5.00
4.43
0.6105552
0.5410468
-11.4
30
1,2-Dichlorobenzene
A
5.00
4.33
0.6677878
0.5780659
-13.4
30
1,3-Dichlorobenzene
A
5.00
4.59
0.7185457
0.660186
-8.1
30
1,4-Dichlorobenzene
A
5.00
4.47
0.7255429
0.6489239
-10.6
30
Dichlorodifluoromethane (Freon 12)
A
5.00
4.54
1.600799
1.454139
-9.2
30
1,1-Dichloroethane
A
5.00
4.05
1.423605
1.153321
-19.0
30
1,2-Dichloroethane
A
5.00
4.02
1.028122
0.8261925
-19.6
30
1,1-Dichloroethylene
A
5.00
4.29
1.209603
1.03771
-14.2
30
cis-1,2-Dichloroethylene
A
5.00
4.00
1.04116
0.8319229
-20.1
30
trans-1,2-Dichloroethylene
A
5.00
4.11
1.067233
0.8766444
-17.9
30
1,2-Dichloropropane
A
5.00
4.39
0.3735819
0.3281535
-12.2
30
cis- 1,3 -Dichloropropene
A
5.00
4.07
0.598896
0.4873663
-18.6
30
trans- l,3-Dichloropropene
A
5.00
4.11
0.4951708
0.4067273
-17.9
30
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 1
A
5.00
5.09
1.603458
1.632626
1.8
30
1,4-Dioxane
A
5.00
4.29
0.1786681
0.1532023
-14.3
30
Ethanol
A
5.00
5.58
0.1333498
0.1488324
11.6
30
Ethyl Acetate
A
5.00
4.43
0.2688611
0.2383542
-11.3
30
Ethylbenzene
A
5.00
4.37
1.551795
1.357598
-12.5
30
4-Ethyltoluene
A
5.00
4.46
1.503853
1.34039
-10.9
30
Heptane
A
5.00
4.36
0.3173761
0.2766455
-12.8
30
Hexachlorobutadiene
4
5.00
3.93
0.3908621
0.307141
-21.4
30
Hexane
L
5.00
5.38
0.9147459
0.8194784
7.6
30
Page 29 of 37

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ANALYTICAL LABORATORY
39 Spruce Street' East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
CONTINUING CALIBRATION CHECK
EPA TO-15
S047830-CCV 1
COMPOUND
TYPE
CONC. (ppbv)
RESPONSE FACTOR
% DIFF / DRIFT
STD
CCV
ICAL
CCV
MIN (#)
CCV
LIMIT (#)
2-Hexanone (MBK)
A
5.00
5.72
0.6903562
0.7898242
14.4
30
Isopropanol
A
5.00
5.86
0.9862453
1.155544
17.2
30
Methyl tert-Butyl Ether (MTBE)
A
5.00
3.78
2.005284
1.517104
-24.3
30
Methylene Chloride
A
5.00
4.68
0.8560843
0.8015543
-6.4
30
4-Methyl-2-pentanone (MI13K)
A
5.00
5.20
0.7339692
0.7638466
4.1
30
Naphthalene
A
5.00
4.45
1.234761
1.09942
-11.0
30
Propene
A
5.00
4.52
0.5882009
0.5311592
-9.7
30
Styrene
A
5.00
4.57
0.8314466
0.7604204
-8.5
30
1,1,2,2-Tetrachloroethane
A
5.00
4.43
0.958853
0.8495796
-11.4
30
Tetrachloroethylene
A
5.00
4.23
0.4443323
0.375744
-15.4
30
Tetrahydrofuran
A
5.00
4.10
0.2974593
0.2436124
-18.1
30
Toluene
A
5.00
4.39
1.207947
1.06016
-12.2
30
1,2,4-Trichlorobenzene
A
5.00
4.13
0.4657953
0.3848959
-17.4
30
1, 1, 1 -Trichloroethane
A
5.00
4.18
0.6076032
0.5075152
-16.5
30
1,1,2-Trichloroethane
A
5.00
4.42
0.4142106
0.36641
-11.5
30
Trichloroethylene
A
5.00
4.16
0.4123623
0.3430809
16.8
30
Trichlorofluoromethane (Freon 11)
A
5.00
5.69
1.305977
1.485486
13.7
30
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 11
A
5.00
4.00
1.416312
1.13308
-20.0
30
1,2,4-Trimethylbenzene
A
5.00
4.41
1.196276
1.054875
-11.8
30
1,3,5-Trimethylbenzene
A
5.00
4.48
1.217495
1.090752
-10.4
30
Vinyl Acetate
A
5.00
3.75
2.001453
1.499888
-25.1
30
Vinyl Chloride
A
5.00
4.93
0.7069786
0.6973992
-1.4
30
m&p-Xylene
A
1 10.0
8.93
1.17503
1.04962
-10.7
30
o-Xylene
A
1 5.00
4.40
1.200604
1.057751
-11.9
30
# Column to be used to flag Response Factor and %Diff/Drift values with an asterisk
* Values outside of QC limits
Page 30 of 37

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street' East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
CONTINUING CALIBRATION CHECK
EPA TO-15
S047874-CCV 1
COMPOUND
TYPE
CONC. (ppbv)
RESPONSE FACTOR
% DIFF / DRIFT
STD
CCV
ICAL
CCV
MIN (#)
CCV
LIMIT (#)
Acetone
A
5.00
6.42
0.9038238
1.159897
28.3
30
Benzene
A
5.00
3.90
1.014039
0.7910026
-22.0
30
Benzyl chloride
A
5.00
4.13
1.098046
0.9076031
-17.3
30
Bromodichloromethane
A
5.00
4.01
0.7248413
0.5817816
-19.7
30
Bromoform
A
5.00
4.86
0.4798376
0.4665037
-2.8
30
Bromomethane
A
5.00
5.45
0.5754725
0.6271004
9.0
30
1,3-Butadiene
A
5.00
5.07
0.5228144
0.5298386
1.3
30
2-Butanone (MEK)
A
5.00
4.73
1.4656
1.38574
-5.4
30
Carbon Disulfide
A
5.00
4.03
2.135681
1.722118
-19.4
30
Carbon Tetrachloride
A
5.00
4.16
0.5401362
0.4499079
-16.7
30
Chlorobenzene
A
5.00
4.28
0.8895419
0.76102
-14.4
30
Chloroethane
A
5.00
5.28
0.3436145
0.3626034
5.5
30
Chloroform
A
5.00
3.97
1.593363
1.266177
-20.5
30
Chloromethane
A
5.00
4.76
0.6540095
0.6228781
-4.8
30
Cyclohexane
A
5.00
3.64
0.4352577
0.3172765
-27.1
30
Dibromochloromethane
A
5.00
4.67
0.5939169
0.5551304
-6.5
30
1,2-Dibromoethane(EDB)
A
5.00
4.37
0.6105552
0.5331664
-12.7
30
1,2-Dichlorobenzene
A
5.00
4.38
0.6677878
0.5842904
-12.5
30
1,3-Dichlorobenzene
A
5.00
4.58
0.7185457
0.6584032
-8.4
30
1,4-Dichlorobenzene
A
5.00
4.53
0.7255429
0.6570836
-9.4
30
Dichlorodifluoromethane (Freon 12)
A
5.00
4.50
1.600799
1.442224
-9.9
30
1,1-Dichloroethane
A
5.00
3.97
1.423605
1.130038
-20.6
30
1,2-Dichloroethane
A
5.00
3.96
1.028122
0.8136256
-20.9
30
1,1-Dichloroethylene
A
5.00
4.22
1.209603
1.021039
-15.6
30
cis-1,2-Dichloroethylene
A
5.00
4.03
1.04116
0.83914
-19.4
30
trans-1,2-Dichloroethylene
A
5.00
4.04
1.067233
0.8612607
-19.3
30
1,2-Dichloropropane
A
5.00
4.14
0.3735819
0.3096066
-17.1
30
cis- 1,3 -Dichloropropene
A
5.00
3.91
0.598896
0.4679204
-21.9
30
trans- l,3-Dichloropropene
A
5.00
3.96
0.4951708
0.3919641
-20.8
30
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 1
A
5.00
5.18
1.603458
1.660514
3.6
30
1,4-Dioxane
A
5.00
4.02
0.1786681
0.1438162
-19.5
30
Ethanol
A
5.00
5.68
0.1333498
0.1513658
13.5
30
Ethyl Acetate
A
5.00
4.53
0.2688611
0.2438051
-9.3
30
Ethylbenzene
A
5.00
4.23
1.551795
1.313234
-15.4
30
4-Ethyltoluene
A
5.00
4.33
1.503853
1.30246
-13.4
30
Heptane
A
5.00
4.15
0.3173761
0.2637075
-16.9
30
Hexachlorobutadiene
A
5.00
3.80
0.3908621
0.2968022
-24.1
30
Hexane
L
5.00
5.33
0.9147459
0.8115065
6.6
30
Page 31 of 37

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ANALYTICAL LABORATORY
39 Spruce Street' East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
CONTINUING CALIBRATION CHECK
EPA TO-15
S047874-CCV 1
COMPOUND
TYPE
CONC. (ppbv)
RESPONSE FACTOR
% DIFF / DRIFT
STD
CCV
ICAL
CCV
MIN (#)
CCV
LIMIT (#)
2-Hexanone (MBK)
A
5.00
5.43
0.6903562
0.7493184
8.5
30
Isopropanol
A
5.00
6.14
0.9862453
1.210305
22.7
30
Methyl tert-Butyl Ether (MTBE)
A
5.00
3.82
2.005284
1.532921
-23.6
30
Methylene Chloride
A
5.00
4.62
0.8560843
0.7902037
-7.7
30
4-Methyl-2-pentanone (MI13K)
A
5.00
4.97
0.7339692
0.7294417
-0.6
30
Naphthalene
A
5.00
3.73
1.234761
0.9201158
-25.5
30
Propene
A
5.00
4.48
0.5882009
0.5271353
-10.4
30
Styrene
A
5.00
4.41
0.8314466
0.7330704
-11.8
30
1,1,2,2-Tetrachloroethane
A
5.00
4.28
0.958853
0.8198053
-14.5
30
Tetrachloroethylene
A
5.00
4.18
0.4443323
0.3712151
-16.5
30
Tetrahydroforan
A
5.00
4.16
0.2974593
0.2473211
-16.9
30
Toluene
A
5.00
4.26
1.207947
1.030124
-14.7
30
1,2,4-Trichlorobenzene
A
5.00
3.94
0.4657953
0.367073
-21.2
30
1, 1, 1 -Trichloroethane
A
5.00
4.00
0.6076032
0.4864863
-19.9
30
1,1,2-Trichloroethane
A
5.00
4.32
0.4142106
0.3579242
-13.6
30
Trichloroethylene
A
5.00
3.93
0.4123623
0.3238865
21.5
30
Trichlorofluoromethane (Freon 11)
A
5.00
5.98
1.305977
1.563332
19.7
30
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 11
A
5.00
4.16
1.416312
1.177121
-16.9
30
1,2,4-Trimethylbenzene
A
5.00
4.30
1.196276
1.030112
-13.9
30
1,3,5-Trimethylbenzene
A
5.00
4.39
1.217495
1.068517
-12.2
30
Vinyl Acetate
A
5.00
3.74
2.001453
1.496466
-25.2
30
Vinyl Chloride
A
5.00
4.98
0.7069786
0.7048175
-0.3
30
m&p-Xylene
A
1 10.0
8.61
1.17503
1.011269
1
-13.9
30
o-Xylene
A
1 5.00
4.26
1.200604
1.023297
1
-14.8
30
# Column to be used to flag Response Factor and %Diff/Drift values with an asterisk
* Values outside of QC limits
Page 32 of 37

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ' FAX [phone] " TEL. [phone]
CERTIFICATIONS
Certified Analyses included in this Report
Analyte
EPA TO-15 in Air
Acetone
Benzene
Benzyl chloride
Bromodichloromethane
Bromoform
Bromomethane
1,3-Butadiene
2-Butanone (MEK)
Carbon Disulfide
Carbon Tetrachloride
Chlorobenzene
Chloroethane
Chloroform
Chloromethane
Cyclohexane
Dibromochloromethane
1,2-Dibromoethane (EDB)
1,2-Dichlorobenzene
1,3-Dichlorobenzene
1,4-Dichlorobenzene
Dichlorodifluoromethane (Freon 12)
1,1-Dichloroethane
1,2-Dichloroethane
1,1-Dichloroethylene
cis-1,2-Dichloroethylene
trans- l,2-Dichloro ethylene
1,2-Dichloropropane
cis- 1,3 -Dichloropropene
trans- 1, 3 -Dichloropropene
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114)
1,4-Dioxane
Ethanol
Ethyl Acetate
Ethylbenzene
4-Ethyltoluene
Heptane
Hexachlorobutadiene
Hexane
2-Hexanone (MBK)
Isopropanol
Methyl tart -Butyl Ether (MTBE)
Methylene Chloride
4-Methyl-2-pentanone (MIBK)
Naphthalene
Propene
Styrene
1,1,2,2-Tetrachloroethane
Certifications
AIHA,NY,ME,NH
AIHA,FL,NJ,NY,ME,NH, VA
AIHA,FL,NJ,NY,ME,NH, VA
AIHA,NJ,NY,ME,NH,VA
AIHA,NJ,NY,ME,NH,VA
AIHA,FL,NJ,NY,ME,NH
AIHA,NJ,NY,ME,NH,VA
AIHA,FL,NJ,NY,ME,NH, VA
AIHA,NJ,NY,ME,NH, VA
AIHA,FL,NJ,NY,ME,NH, VA
AIHA,FL,NJ,NY,ME,NH, VA
AIHA,FL,NJ,NY,ME,NH, VA
AIHA,FL,NJ,NY,ME,NH, VA
AIHA,FL,NJ,NY,ME,NH, VA
AIHA,NJ,NY,ME,NH,VA
AIHA,NY,ME,NH
AIHA,NJ,NY,ME,NH
AIHA,FL,NJ,NY,ME,NH, VA
AIHA,NJ,NY,ME,NH
AIHA,FL,NJ,NY,ME,NH, VA
AIHA,NY,ME,NH
AIHA,FL,NJ,NY,ME,NH, VA
AIHA,FL,NJ,NY,ME,NH, VA
AIHA,FL,NJ,NY,ME,NH, VA
AIHA,FL,NY,ME,NH,VA
AIHA,NJ,NY,ME,NH,VA
AIHA,FL,NJ,NY,ME,NH, VA
AIHA,FL,NJ,NY,ME,NH, VA
AIHA,NY,ME,NH
AIHA,NJ,NY,ME,NH,VA
AIHA,NJ,NY,ME,NH,VA
AIHA
AIHA
AIHA,FL,NJ,NY,ME,NH, VA
AIHA,NJ
AIHA,NJ,NY,ME,NH,VA
AIHA,NJ,NY,ME,NH,VA
AIHA,FL,NJ,NY,ME,NH, VA
AIHA
AIHA,NY,ME,NH
AIHA,FL,NJ,NY,ME,NH, VA
AIHA,FL,NJ,NY,ME,NH, VA
AIHA,FL,NJ,NY,ME,NH
NY,ME,NH
AIHA
AIHA,FL,NJ,NY,ME,NH, VA
AIHA,FL,NJ,NY,ME,NH,VA
Page 33 of 37

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ' FAX [phone] " TEL. [phone]
CERTIFICATIONS
Certified Analyses included in this Report
Analyte Certifications
EPA TO-15 in Air
Tetrachloroethylene
AIHA,FL,NJ,NY,ME,NH,VA
Tetrahydrofuran
AIHA
Toluene
AIHA,FL,NJ,NYM E,NH,VA
1,2,4-Trichlorobenzene
AIHA,NJ,NY,ME,NH,VA
1, 1, 1 -Trichloroethane
AIHA,FL,NJ,NY,ME,NH,VA
1,1,2-Trichloroethane
AIHA,FL,NJ,NY,ME,NH,VA
Trichloroethylene
AIHA,FL,NJ,NY,ME,NH,VA
Trichlorofluoromethane (Freon 11)
AIHA,NY,ME,NH
1,1,2-Trichloro-1,2,2-ttifluoroethane
(Freon 113)
AIHA,NJ,NY,ME,NH,VA
1,2,4-Trimethylbenzene
AIHA,NJ,NY,ME,NH
1,3,5-Trimethylbenzene
AIHA,NJ,NY,ME,NH
Vinyl Acetate
AIHA,FLNJ,NY,ME,NH,VA
Vinyl Chloride
AIHA,FLNJ,NY,ME,NH,VA
m&p-Xylene
AIHA,FL,NJ,NY,ME,NH,VA
o-Xylene
AIHA,FL,NJ,NY,ME,NH,VA
The CON -TEST Environmental
Laboratory operates under the following certifications and accreditations:
Code
Description
Number
Expires
AIHA
AIHA-LAP, LLC - ISO17025:2017
100033
03/l/2022
MA
Massachusetts DEP
M-MA100
06/30/2020
CT
Connecticut Department of Publilc Health
PH-0567
09/30/2021
NY
New York State Department of Health
10899 NELAP
04/1/2021
NH-S
New Hampshire Environmental Lab
2516 NELAP
02/5/2021
RI
Rhode Island Department of Health
LA000112
12/30/2020
NC
North Carolina Div. of Water Quality
652
12/31/2020
NJ
New Jersey DEP
MA007 NELAP
06/30/2020
FL
Florida Department of Health
E871027 NELAP
06/30/2020
VT
Vermont Department of Health Lead Laboratory
LL015036
07/30/2020
ME
State of Maine
2011028
06/9/2021
VA
Commonwealth of Virginia
460217
12/14/2020
NH-P
New Hampshire Environmental Lab
2557 NELAP
09/6/2020
VT-DW
Vermont Department of Health Drinking
Water
VT-255716
06/12/2020
NC-DW
North Carolina Department of Health
25703
07/31/2020
PA
Commonwealth of Pennsylvania DEP
68-05812
06/30/2020
Page 34 of 37

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Page 35 of 37

4/17/2020
Track your package or shipment with FedEx Tracking
IMPORTANT!
We are continuing to respond to the impact of COVID-19 around the world. See our latest updates. For COVID-19-related recipient
closures, you can redirect packages, Ask FedEx, or contact the shipper.
N&x
I49_54200217
Delivered
Friday 4/17/2020 at 9:45 are
FROM
Ralcigh, NBC US
Multiple -piece Shipment
TRACKING NUMBER SHIPPER CITY, STATE
149454200217
{:7 Easler
144454200228
D IRHA!'/, NC;
GJRi-IA�'A NC
DELIVERED
S'jgrature not required
GET STATUS UPDATES
ODTAIN PROOF OF DELIVERY
TO -
Shipment Facts
TRACKING NUMBER
SERVICE
RASTER TRACKING NUMBER
A c..,, ', ;
WEIGHT
DIMENSIONS
TOTAL PIECES
TOTAL SHIPMENT WEIGHT
TERMS
PACKAGING
201 lies ! 9 of kgs
l bird Party
Package
STANDARD TRANSIT
SHIP DATE
ACTUAL DELIVERY
1:6 4! 1 i;2020 945
4l l i 020
t"1F•G Z,.
https://www.tedex.com/apps/fedextrack!?action=track&trackingnurnber=1494542002l7&cntry_pode=us&locale=en_US Page 36 of 37

I Have Not Confirmed Sample Container
Numbers With Lab Staff Before 4:40n7mbESt
Relinquishing Over L-AMCM.4►-'orIv
Samples
lac# 2713. Reu: 6 �017.
Air Media Sample Receipt Checklist - (Rejection Criteria Listing - using Acceptance Policy) Any False
St fernent will be brought to the attention of the Client - State True or False
Client k` ' A � Ckr--t 11.
Received By VzLeDate
Time
How were the samples In Cooler
On Ice No Ice
received? In Box
Ambient Melted Ice
Were samples within Temperature
_
By Gun #
Actual Temp -
Compliance? 2-6°C
By Blank #
Actual Temp -
Was Custody Seal Intact?
Were Samples Tampered with?
Was COC Relinquished ?
Does Chain Agree With Samples? #
Are there any loose caps/valves on any samples?
Is COC in ink/ Legible? t
Did COC Include all Client i
Analysis
Sampler Name
Pertinent Information? Project T
ID's
Collection DateslTimes
Are Sample Labels filled out and legible?
-T-
Are there Rushes?
Who was notified?
Samples are received within holding time?
Proper Media Used?
Individually Certified Cans? -
Are there Trip Blanks? CzIs
there enough Volume?

DEQ RISK SUMMARY SHEETS
Mid Atlantic

DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air u
Version Date: December 2019
Basis: November 2019 EPA RSL Table
Site ID: Northgate Mall
Exposure Unit ID: Prime Cleaners Cumulative
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
All concentrations are in u m3
CAS #
Chemical Name:
Soil Gas
Concentration
s
(ug/m)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non -
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non -
Carcinogenic
Hazard
Quotient
67-64-1
Acetone
250
7.5
-
6.5E+03
2.3E-04
71-43-2
Benzene
0.87
0.0261
3.6E-01
6.3E+00
7.3E-08
8.3E-04
75-15-0
Carbon Disulfide
9.1
0.273
-
1.5E+02
3.7E-04
67-66-3
Chloroform
4.6
0.138
1.2E-01
2.0E+01
1.1E-06
1.4E-03
74-87-3
Chloromethane
0.92
0.0276
-
1.9E+01
2.9E-04
106-46-7
Dichlorobenzene, 1,4-
2.9
0.087
2.6E-01
1.7E+02
3.4E-07
1.0E-04
75-71-8
Dichlorodifluoromethane
330
9.9
-
2.1E+01
9.5E-02
100-41-4
Eth lbenzene
1.7
0.051
1.1E+00
2.1E+02
4.5E-08
4.9E-05
109-99-9
-Tetrah drofuran
1.1
0.033
-
4.2E+02
1.6E-05
142-82-5
H tane, N-
1.5
0.045
-
8.3E+01
1.1E-04
67-63-0
Iso ro anol
100
3
-
4.2E+01
1.4E-02
78-93-3
Methyl Ethyl Ketone 2-Butanone
7.7
0.231
-
1.0E+03
4.4E-05
75-09-2
Methylene Chloride
1.3
0.039
1.0E+02
1.3E+02
3.8E-10
6.2E-05
91-20-3
-Naphthalene
1.5
0.045
8.3E-02
6.3E-01
5.4E-07
1.4E-02
100-42-5
Styrene
1.2
0.036
-
2.1E+02
3.5E-05
127-18-4
Tetrachloroeth lene
750
22.5
1.1E+01
8.3E+00
2.1E-06
5.4E-01
108-88-3
Toluene
7.7
0.231
-
1.0E+03
4.4E-05
76-13-1
Trichloro-1,2,2-trifluoroethane, 1,1,2-
1.6
0.048
-
1.0E+03
9.2E-06
79-01-6
Trichloroeth lene
120
3.6
4.8E-01
4.2E-01
7.5E-06
1.7E+00
75-69-4
Trichlorofluoromethane
6
0.18
-
-
108-67-8
Trimeth lbenzene, 1,3,5-
1.5
0.045
-
1.3E+01
7.2E-04
1330-20-7
X lenes
9.6
0.288
-
2.1E+01
2.8E-03
North Carolina DEC Risk Calculator

DEQ Risk Calculator - Vapor Intrusion - Non -Residential Worker Soil Gas to Indoor Air 1
Version Date: December 2019 IN
November 2019 EPA RSL Table
Site ID: Northgate Mall IL I
Exposure Unit ID: Prime Cleaners Cumulative
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
All concentrations are in ue/m3
CAS #
Chemical Name:
Soil Gas
Concentration
s
(ug/m)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non -
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non -
Carcinogenic
Hazard
Quotient
67-64-1
Acetone
250
2.5
2.7E+04
1.8E-05
71-43-2
Benzene
0.87
0.0087
1.6E+00
2.6E+01
5.5E-09
6.6E-05
75-15-0
Carbon Disulfide
9.1
0.091
6.1E+02
3.0E-05
67-66-3
Chloroform
4.6
0.046
5.3E-01
8.6E+01
8.6E-08
1.1E-04
74-87-3
Chloromethane
0.92
0.0092
7.9E+01
2.3E-05
106-46-7
Dichlorobenzene, 1,4-
2.9
0.029
1.1E+00
7.0E+02
2.6E-08
8.3E-06
75-71-8
Dichlorodiflumomethane
330
3.3
8.8E+01
7.5E-03
100-41-4
Eth lbenzene
1.7
0.017
4.9E+00
8.8E+02
3.5E-09
3.9E-06
109-99-9
-Tetrah drofuran
1.1
0.011
1.8E+03
1.3E-06
142-82-5
Heptane, N-
1.5
0.015
3.5E+02
8.6E-06
67-63-0
IsD ro anol
100
1
1.8E+02
1.1E-03
78-93-3
Methyl Ethyl Ketone 2-Butanone
7.7
0.077
4.4E+03
3.5E-06
75-09-2
Methylene Chloride
1.3
0.013
1.2E+03
5.3E+02
1.1E-11
4.9E-06
91-20-3
-Naphthalene
1.5
0.015
3.6E-01
2.6E+00
4.2E-08
1.1E-03
100-42-5
Styrene
1.2
0.012
8.8E+02
2.7E-06
127-18-4
Tetrachloroeth lene
750
7.5
4.7E+01
3.5E+01
1.6E-07
4.3E-02
108-88-3
Toluene
7.7
0.077
4.4E+03
3.5E-06
76-13-1
Trichloro-1,2,2-trifluoroethane, 1,1,2-
1.6
0.016
4.4E+03
7.3E-07
79-01-6
Trichloroeth lene
120
1.2
3.0E+00
1.8E+00
4.0E-07
1.4E-01
75-69-4
Trichlorofluoromethane
6
0.06
108-67-8
Trimeth lbenzene, 1,3,5-
1.5
0.015
5.3E+01
5.7E-05
1330-20-7
X lens
9.6
0.096
8.8E+01
2.2E-04
Cumulative: I 7.2E-07 I 1.9E-01
North Carolina DEQ Risk Calculator

DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air u
Version Date: December 2019
Basis: November 2019 EPA RSL Table
Site ID: Northgate Mall
Exposure Unit ID: North ate Auto Cumulative
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
All concentrations are in u m3
CAS #
Chemical Name:
Soil Gas
Concentration
s
(ug/m)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non -
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non -
Carcinogenic
Hazard
Quotient
67-64-1
Acetone
1300
39
-
6.5E+03
1.2E-03
71-43-2
Benzene
0.41
0.0123
3.6E-01
6.3E+00
3.4E-08
3.9E-04
67-66-3
Chloroform
34
1.02
1.2E-01
2.0E+01
8.4E-06
1.0E-02
110-82-7
C clohexane
44
1.32
-
1.3E+03
2.1E-04
75-71-8
Dichlorodifluoromethane
2.4
0.072
-
2.1E+01
6.9E-04
156-59-2
Dichloroeth lene, 1,2-cis-
10
0.3
-
-
100-41-4
Eth lbenzene
2.4
0.072
1.1E+00
2.1E+02
6.4E-08
6.9E-05
142-82-5
He tane, N-
1.6
0.048
-
8.3E+01
1.2E-04
67-63-0
Iso ro anol
180
5.4
-
4.2E+01
2.6E-02
78-93-3
Methyl Ethyl Ketone (2-Butanone)
84
2.52
-
1.0E+03
4.8E-04
1634-044
Methyl tert-Butyl Ether (MTBE)
57
1.71
1.1E+01
6.3E+02
1.6E-07
5.5E-04
91-20-3
-Naphthalene
1.5
0.045
8.3E-02
6.3E-01
5.4E-07
1.4E-02
127-18-4
Tetrachloroeth lene
97
2.91
1.1E+01
8.3E+00
2.7E-07
7.0E-02
108-88-3
Toluene
14
0.42
-
1.0E+03
8.1E-05
76-13-1
Trichloro-1,2,2-trifluoroethane, 1,1,2-
2.1
0.063
-
1.0E+03
1.2E-05
79-01-6
Trichloroethylene
7.4
0.222
4.8E-01
4.2E-01
4.6E-07
1.1E-01
75-69-4
Trichlorofluoromethane
2.1
0.063
-
-
108-67-8
Trimeth lbenzene, 1,3,5-
1.3
0.039
-
1.3E+01
6.2E-04
1330-20-7
Xylenes
14.1
0.423
-
2.1E+01
4.1E-03
North Carolina DEC Risk Calculator

DEQ Risk Calculator - Vapor Intrusion - Non -Residential Worker Soil Gas to Indoor Air 1
Version Date: December 2019 IN
November 2019 EPA RSL Table
Site ID: Northgate Mall
Exposure Unit ID: Northsate Auto Cumulative
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
All concentrations are in ue/m3
CAS #
Chemical Name:
Soil Gas
Concentration
s
(ug/m)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non -
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non -
Carcinogenic
Hazard
Quotient
67-64-1
Acetone
1300
13
2.7E+04
9.6E-05
71-43-2
Benzene
0.41
0.0041
1.6E+00
2.6E+01
2.6E-09
3.1E-05
67-66-3
Chloroform
34
0.34
5.3E-01
8.6E+01
6.4E-07
7.9E-04
110-82-7
C clohexane
44
0.44
5.3E+03
1.7E-05
75-71-8
Dichlorodifluoromethane
2.4
0.024
8.8E+01
5.5E-05
156-59-2
Dichloroeth lene, 1,2-cis-
10
0.1
100-41-4
Eth lbenzene
2.4
0.024
4.9E+00
8.8E+02
4.9E-09
5.5E-06
142-82-5
Heptane, N-
1.6
0.016
3.5E+02
9.1E-06
67-63-0
Iso ro anol
180
1.8
1.8E+02
2.1E-03
78-93-3
Methyl Ethyl Ketone (2-Butanone)
84
0.84
4.4E+03
3.8E-05
1634-04-4
Methyl tert-Butyl Ether (MTBE)
57
0.57
4.7E+01
2.6E+03
1.2E-08
4.3E-05
91-20-3
-Naphthalene
1.5
0.015
3.6E-01
2.6E+00
4.2E-08
1.1E-03
127-18-4
Tetrachloroeth lene
97
0.97
4.7E+01
3.5E+01
2.1E-08
5.5E-03
108-88-3
Toluene
14
0.14
4.4E+03
6.4E-06
76-13-1
Trichloro-1,2,2-trifluoroethane, 1,1,2-
2.1
0.021
4.4E+03
9.6E-07
79-01-6
Trichloroeth lene
7.4
0.074
3.0E+00
1.8E+00
2.5E-08
8.4E-03
75-69-4
Trichlorofluoromethane
2.1
0.021
108-67-8
Trimeth lbenzene, 1,3,5-
1.3
0.013
5.3E+01
4.9E-05
1330-20-7
X lens
14.1
0.141
8.8E+01
3.2E-04
Cumulative: I 7.4E-07 I 1.9E-02
North Carolina DEQ Risk Calculator

DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air u
Version Date: December 2019
Basis: November 2019 EPA RSL Table
Site ID: Northgate Mall
Exposure Unit ID: SG-1 & Duplicate
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
All concentrations are in u m3
CAS #
Chemical Name:
Soil Gas
Concentration
s
(ug/m)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non -
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non -
Carcinogenic
Hazard
Quotient
67-64-1
Acetone
250
7.5
-
6.5E+03
2.3E-04
71-43-2
Benzene
0.87
0.0261
3.6E-01
6.3E+00
7.3E-08
8.3E-04
75-15-0
Carbon Disulfide
9.1
0.273
-
1.5E+02
3.7E-04
67-66-3
Chloroform
4.6
0.138
1.2E-01
2.0E+01
1.1E-06
1.4E-03
74-87-3
Chloromethane
0.92
0.0276
-
1.9E+01
2.9E-04
75-71-8
Dichlorodifluoromethane
2
0.06
-
2.1E+01
5.8E-04
100-41-4
Eth lbenzene
1.7
0.051
1.1E+00
2.1E+02
4.5E-08
4.9E-05
109-99-9
-Tetrah drofuran
0.86
0.0258
-
4.2E+02
1.2E-05
142-82-5
H tane, N-
1.5
0.045
-
8.3E+01
1.1E-04
67-63-0
Iso ro anol
100
3
-
4.2E+01
1.4E-02
78-93-3
Methyl Ethyl Ketone 2-Butanone
5.5
0.165
-
1.0E+03
3.2E-05
75-09-2
Methylene Chloride
1.3
0.039
1.0E+02
1.3E+02
3.8E-10
6.2E-05
91-20-3
-Naphthalene
1.5
0.045
8.3E-02
6.3E-01
5.4E-07
1.4E-02
127-18-4
Tetrachloroeth lene
750
22.5
1.1E+01
8.3E+00
2.1E-06
5.4E-01
108-88-3
Toluene
7.7
0.231
-
1.0E+03
4.4E-05
76-13-1
Trichloro-1,2,2-trifluoroethane, 1,1,2-
1.6
0.048
-
1.0E+03
9.2E-06
79-01-6
Trichloroeth lene
120
3.6
4.8E-01
4.2E-01
7.5E-06
1.7E+00
75-69-4
Trichlorofluoromethane
2.1
0.063
-
-
108-67-8
Trimeth lbenzene, 1,3,5-
1.5
0.045
-
1.3E+01
7.2E-04
1330-20-7
X lenes
9.6
0.288
-
2.1E+01
2.8E-03
North Carolina DEC Risk Calculator

DEQ Risk Calculator - Vapor Intrusion - Non -Residential Worker Soil Gas to Indoor Air 1
Version Date: December 2019 IN
November 2019 EPA RSL Table
ID: Northgate Mall
usure Unit ID: SG-1 &
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
All concentrations are in ue/m3
CAS #
Chemical Name:
Soil Gas
Concentration
s
(ug/m)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non -
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non -
Carcinogenic
Hazard
Quotient
67-64-1
Acetone
250
2.5
2.7E+04
1.8E-05
71-43-2
Benzene
0.87
0.0087
1.6E+00
2.6E+01
5.5E-09
6.6E-05
75-15-0
Carbon Disulfide
9.1
0.091
6.1E+02
3.0E-05
67-66-3
Chloroform
4.6
0.046
5.3E-01
8.6E+01
8.6E-08
1.1E-04
74-87-3
Chloromethane
0.92
0.0092
7.9E+01
2.3E-05
75-71-8
Dichlorodiflumomethane
2
0.02
8.8E+01
4.6E-05
100-41-4
Eth lbenzene
1.7
0.017
4.9E+00
8.8E+02
3.5E-09
3.9E-06
109-99-9
-Tetrah drofuran
0.86
0.0086
1.8E+03
9.8E-07
142-82-5
Heptane, N-
1.5
0.015
3.5E+02
8.6E-06
67-63-0
IsD ro anol
100
1
1.8E+02
1.1E-03
78-93-3
Methyl Ethyl Ketone 2-Butanone
5.5
0.055
4.4E+03
2.5E-06
75-09-2
Methylene Chloride
1.3
0.013
1.2E+03
5.3E+02
1.1E-11
4.9E-06
91-20-3
-Naphthalene
1.5
0.015
3.6E-01
2.6E+00
4.2E-08
1.1E-03
127-18-4
Tetrachloroeth lene
750
7.5
4.7E+01
3.5E+01
1.6E-07
4.3E-02
108-88-3
Toluene
7.7
0.077
4.4E+03
3.5E-06
76-13-1
Trichloro-1,2,2-trifluoroethane, 1,1,2-
1.6
0.016
4.4E+03
7.3E-07
79-01-6
Trichloroeth lene
120
1.2
3.0E+00
1.8E+00
4.0E-07
1.4E-01
75-69-4
Trichlorofluoromethane
2.1
0.021
108-67-8
Trimeth lbenzene, 1,3,5-
1.5
0.015
5.3E+01
5.7E-05
1330-20-7
X lens
9.6
0.096
8.8E+01
2.2E-04
Cumulative: I 7.0E-07 I 1.8E-01
North Carolina DEQ Risk Calculator

DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
u
Version Date: December 2019
Basis: November 2019 EPA RSL Table
Site ID: Northgate Mall
Exposure Unit ID: SG-2
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
All concentrations are in u m3
CAS #
Chemical Name:
Soil Gas
Concentration
s
(ug/m)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non -
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non -
Carcinogenic
Hazard
Quotient
67-64-1
Acetone
120
3.6
-
6.5E+03
1.1E-04
71-43-2
Benzene
0.64
0.0192
3.6E-01
6.3E+00
5.3E-08
6.1E-04
67-66-3
Chloroform
1
0.03
1.2E-01
2.0E+01
2.5E-07
2.9E-04
75-71-8
Dichlorodifluoromethane
280
8.4
-
2.1E+01
8.1E-02
100-41-4
Eth lbenzene
1.5
0.045
1.1E+00
2.1E+02
4.0E-08
4.3E-05
109-99-9
-Tetrah drofuran
1.1
0.033
-
4.2E+02
1.6E-05
67-63-0
Iso ro anol
11
0.33
-
4.2E+01
1.6E-03
78-93-3
Methyl Ethyl Ketone 2-Butanone
7.7
0.231
-
1.0E+03
4.4E-05
100-42-5
Styrene
1.2
0.036
-
2.1E+02
3.5E-05
127-18-4
Tetrachloroeth lene
1.8
0.054
1.1E+p1
8.3E+00
5.0E-09
1.3E-03
108-88-3
Toluene
3.7
0.111
-
1.0E+03
2.1E-05
76-13-1
Trichloro-1,2,2-trifluoroethane, 1,1,2-
1.4
0.042
-
1.0E+03
8.1E-06
75-69-4
Trichlorofluoromethane
6
0.18
-
-
108-67-8
Trimeth lbenzene, 1,3,5-
0.85
0.0255
-
1.3E+01
4.1E-04
1330-20-7
X lenes
8.7
0.261
-
2.1E+01
2.5E-03
North Carolina DEC Risk Calculator

DEQ Risk Calculator - Vapor Intrusion - Non -Residential Worker Soil Gas to Indoor Air 1
Version Date: December 2019 IN
s: November 2019 EPA RSL Table
ID: Northgate Mall
usure Unit ID: SG-2
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
All concentrations are in ue/m3
CAS #
Chemical Name:
Soil Gas
Concentration
s
(ug/m)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non -
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non -
Carcinogenic
Hazard
Quotient
67-64-1
Acetone
120
1.2
2.7E+04
8.8E-06
71-43-2
Benzene
0.64
0.0064
1.6E+00
2.6E+01
4.1E-09
4.9E-05
67-66-3
Chloroform
1
0.01
5.3E-01
8.6E+01
1.9E-08
2.3E-05
75-71-8
Dichlorodifluoromethane
280
2.8
8.8E+01
6.4E-03
100-41-4
Eth lbenzene
1.5
0.015
4.9E+00
8.8E+02
3.1E-09
3.4E-06
109-99-9
-Tetrah drofuran
1.1
0.011
1.8E+03
1.3E-06
67-63-0
Iso ro anol
11
0.11
1.8E+02
1.3E-04
78-93-3
Methyl Ethyl Ketone (2-Butanone)
7.7
0.077
4.4E+03
3.5E-06
100-42-5
Styrene
1.2
0.012
8.8E+02
2.7E-06
127-18-4
Tetrachloroeth lene
1.8
0.018
4.7E+01
3.5E+01
3.8E-10
1.0E-04
108-88-3
Toluene
3.7
0.037
4.4E+03
1.7E-06
76-13-1
Trichloro-1,2,2-trifluoroethane, 1,1,2-
1.4
0.014
4.4E+03
6.4E-07
75-69-4
Trichlorofluoromethane
6
0.06
108-67-8
Trimeth lbenzene, 1,3,5-
0.85
0.0085
5.3E+01
3.2E-05
1330-20-7
X lens
8.7
0.087
8.8E+01
2.0E-04
Cumulative: I 2.6E-08 I 6.9E-03
North Carolina DEQ Risk Calculator

DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
u
Version Date: December 2019
Basis: November 2019 EPA RSL Table
Site ID: Northgate Mall
Exposure Unit ID: SG-3
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
All concentrations are in u m3
CAS #
Chemical Name:
Soil Gas
Concentration
s
(ug/m)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non -
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non -
Carcinogenic
Hazard
Quotient
67-64-1
Acetone
51
1.53
-
6.5E+03
4.7E-05
71-43-2
Benzene
0.7
0.021
3.6E-01
6.3E+00
5.8E-08
6.7E-04
106-46-7
Dichlorobenzene, 1,4-
2.9
0.087
2.6E-01
1.7E+02
3.4E-07
1.0E-04
75-71-8
Dichlorodifluoromethane
330
9.9
-
2.1E+01
9.5E-02
100-41-4
Eth lbenzene
1.5
0.045
1.1E+00
2.1E+02
4.0E-08
4.3E-05
109-99-9
-Tetrah drofuran
0.83
0.0249
-
4.2E+02
1.2E-05
142-82-5
He tane, N-
0.82
0.0246
-
8.3E+01
5.9E-05
67-63-0
Iso ro anol
8.7
0.261
-
4.2E+01
1.3E-03
78-93-3
Methyl Ethyl Ketone (2-Butanone)
4.7
0.141
-
1.0E+03
2.7E-05
91-20-3
-Naphthalene
0.82
0.0246
8.3E-02
6.3E-01
3.0E-07
7.9E-03
108-88-3
Toluene
4.5
0.135
-
1.0E+03
2.6E-05
75-69-4
Trichlorofluoromethane
3.1
0.093
-
-
108-67-8
Trimeth lbenzene, 1,3,5-
0.96
0.0288
-
1.3E+01
4.6E-04
1330-20-7
X lenes
9
0.27
-
2.1E+01
2.6E-03
North Carolina DEC Risk Calculator

DEQ Risk Calculator - Vapor Intrusion - Non -Residential Worker Soil Gas to Indoor Air 1
Version Date: December 2019 IN
s: November 2019 EPA RSL Table
ID: Northgate Mall
usure Unit ID: SG-3
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
All concentrations are in ue/m3
CAS #
Chemical Name:
Soil Gas
Concentration
s
(ug/m)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non -
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non -
Carcinogenic
Hazard
Quotient
67-64-1
Acetone
51
0.51
2.7E+04
3.8E-06
71-43-2
Benzene
0.7
0.007
1.6E+00
2.6E+01
4.5E-09
5.3E-05
106-46-7
Dichlorobenzene, 1,4-
2.9
0.029
1.1E+00
7.0E+02
2.6E-08
8.3E-06
75-71-8
Dichlorodifluoromethane
330
3.3
8.8E+01
7.5E-03
100-41-4
Eth lbenzene
1.5
0.015
4.9E+00
8.8E+02
3.1E-09
3.4E-06
109-99-9
-Tetrah drofuran
0.83
0.0083
1.8E+03
9.5E-07
142-82-5
Heptane, N-
0.82
0.0082
3.5E+02
4.7E-06
67-63-0
Iso ro anol
8.7
0.087
1.8E+02
9.9E-05
78-93-3
Methyl Ethyl Ketone (2-Butanone)
4.7
0.047
4.4E+03
2.1E-06
91-20-3
-Naphthalene
0.82
1 0.0082
3.6E-01
2.6E+00
2.3E-08
1 6.2E-04
108-88-3
Toluene
4.5
0.045
4.4E+03
2.1E-06
75-69-4
Trichlorofluoromethane
3.1
0.031
108-67-8
Trimeth lbenzene, 1,3,5-
0.96
0.0096
5.3E+01
3.7E-05
1330-20-7
X lens
9
0.09
8.8E+01
2.1E-04
Cumulative: I 5.6E-08 I 8.6E-03
North Carolina DEQ Risk Calculator

DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
u
Version Date: December 2019
Basis: November 2019 EPA RSL Table
Site ID: Northgate Mall
Exposure Unit ID: SG-4
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
All concentrations are in u m3
CAS #
Chemical Name:
Soil Gas
Concentration
s
(ug/m)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non -
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non -
Carcinogenic
Hazard
Quotient
67-64-1
Acetone
1300
39
-
6.5E+03
1.2E-03
67-66-3
Chloroform
34
1.02
1.2E-01
2.0E+01
8.4E-06
1.0E-02
110-82-7
C clohexane
44
1.32
-
1.3E+03
2.1E-04
75-71-8
Dichlorodifluoromethane
2.4
0.072
-
2.1E+01
6.9E-04
156-59-2
Dichloroeth lene, 1,2-cis-
10
0.3
-
-
100-41-4
Eth lbenzene
1.7
0.051
1.1E+00
2.1E+02
4.5E-08
4.9E-05
67-63-0
Iso ro anol
180
5.4
-
4.2E+01
2.6E-02
78-93-3
Methyl Ethyl Ketone (2-Butanone)
84
2.52
-
1.0E+03
4.8E-04
1634-04-4
Methyl tert-Butyl Ether (MTBE)
57
1.71
1.1E+01
6.3E+02
1.6E-07
5.5E-04
91-20-3
-Naphthalene
1.5
0.045
8.3E-02
6.3E-01
5.4E-07
1.4E-02
127-18-4
Tetrachloroeth lene
97
2.91
1.1E+01
8.3E+00
2.7E-07
7.0E-02
79-01-6
Trichloroeth lene
7.4
0.222
4.8E-01
4.2E-01
4.6E-07
1.1E-01
108-67-8
Trimeth lbenzene, 1,3,5-
1.2
0.036
-
1.3E+01
5.8E-04
1330-20-7
X lenes
9.8
0.294
-
2.1E+01
2.8E-03
North Carolina DEC Risk Calculator

DEQ Risk Calculator - Vapor Intrusion - Non -Residential Worker Soil Gas to Indoor Air 1
Version Date: December 2019 IN
s: November 2019 EPA RSL Table
ID: Northgate Mall
usure Unit ID: SG-4
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
All concentrations are in ue/m3
CAS #
Chemical Name:
Soil Gas
Concentration
s
(ug/m)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non -
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non -
Carcinogenic
Hazard
Quotient
67-64-1
Acetone
1300
13
2.7E+04
9.6E-05
67-66-3
Chloroform
34
0.34
5.3E-01
8.6E+01
6.4E-07
7.9E-04
110-82-7
C clohexane
44
0.44
5.3E+03
1.7E-05
75-71-8
Dichlorodifluoromethane
2.4
0.024
8.8E+01
5.5E-05
156-59-2
Dichloroeth lene, 1,2-cis-
10
0.1
100-41-4
Eth lbenzene
1.7
0.017
4.9E+00
8.8E+02
3.5E-09
3.9E-06
67-63-0
IsD ro anal
180
1.8
1.8E+02
2.1E-03
78-93-3
Methyl Ethyl Ketone 2-Butanone
84
0.84
4.4E+03
3.8E-05
1634-044
Methyl tert-Butyl Ether MTBE
57
0.57
1 4.7E+01
2.6E+03
1.2E-08
4.3E-05
91-20-3
-Naphthalene
1.5
0.015
3.6E-01
2.6E+00
4.2E-08
1.1E-03
127-18-4
Tetrachloroeth lene
97
0.97
4.7E+01
3.5E+01
2.1E-08
5.5E-03
79-01-6
Trichloroeth lene
7.4
0.074
3.0E+00
1.8E+00
2.5E-08
8.4E-03
108-67-8
Trimeth lbenzene, 1,3,5-
1.2
0.012
5.3E+01
4.6E-05
1330-20-7
X lens
9.8
0.098
8.8E+01
2.2E-04
Cumulative: I 7.4E-07 I 1.8E-02
North Carolina DEQ Risk Calculator

DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
u
Version Date: December 2019
Basis: November 2019 EPA RSL Table
Site ID: Northgate Mall
Exposure Unit ID: SG-5
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
All concentrations are in u m3
CAS #
Chemical Name:
Soil Gas
Concentration
s
(ug/m)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non -
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non -
Carcinogenic
Hazard
Quotient
67-64-1
Acetone
540
16.2
-
6.5E+03
5.0E-04
71-43-2
Benzene
0.41
0.0123
3.6E-01
6.3E+00
3.4E-08
3.9E-04
67-66-3
Chloroform
3.7
0.111
1.2E-01
2.0E+01
9.1E-07
1.1E-03
75-71-8
Dichlorodifluoromethane
2.2
0.066
-
2.1E+01
6.3E-04
100-41-4
Eth lbenzene
2.4
0.072
1.1E+00
2.1E+02
6.4E-08
6.9E-05
142-82-5
H tone, N-
1.6
0.048
-
8.3E+01
1.2E-04
67-63-0
Iso ro anol
36
1.08
-
4.2E+01
5.2E-03
78-93-3
Methyl Ethyl Ketone (2-Butanone)
14
0.42
-
1.0E+03
8.1E-05
91-20-3
-Naphthalene
0.82
0.0246
8.3E-02
6.3E-01
3.0E-07
7.9E-03
127-18-4
Tetrachloroeth lene
32
0.96
1.1E+01
8.3E+00
8.9E-08
2.3E-02
108-88-3
Toluene
14
0.42
-
1.0E+03
8.1E-05
76-13-1
Trichloro-1,2,2-trifluoroethane, 1,1,2-
2.1
0.063
-
1.0E+03
1.2E-05
75-69-4
Trichlorofluoromethane
2.1
0.063
-
-
108-67-8
Trimeth lbenzene, 1,3,5-
1.3
0.039
-
1.3E+01
6.2E-04
1330-20-7
X lenes
14.1
0.423
-
2.1E+01
4.1E-03
North Carolina DEC Risk Calculator

DEQ Risk Calculator - Vapor Intrusion - Non -Residential Worker Soil Gas to Indoor Air 1
Version Date: December 2019 IN
s: November 2019 EPA RSL Table
ID: Northgate Mall
usure Unit ID: SG-5
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
All concentrations are in ue/m3
CAS #
Chemical Name:
Soil Gas
Concentration
s
(ug/m)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non -
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non -
Carcinogenic
Hazard
Quotient
67-64-1
Acetone
540
5.4
2.7E+04
4.0E-05
71-43-2
Benzene
0.41
0.0041
1.6E+00
2.6E+01
2.6E-09
3.1E-05
67-66-3
Chloroform
3.7
0.037
5.3E-01
8.6E+01
6.9E-08
8.6E-05
75-71-8
Dichlorodifluoromethane
2.2
0.022
8.8E+01
5.0E-05
100-41-4
Eth lbenzene
2.4
0.024
4.9E+00
8.8E+02
4.9E-09
5.5E-06
142-82-5
Heptane, N-
1.6
0.016
3.5E+02
9.1E-06
67-63-0
Iso ro anol
36
0.36
1.8E+02
4.1E-04
78-93-3
Methyl Ethyl Ketone (2-Butanone)
14
0.14
4.4E+03
6.4E-06
91-20-3
-Naphthalene
0.82
0.0082
3.6E-01
2.6E+00
2.3E-08
6.2E-04
127-18-4
Tetrachloroeth lene
32
1 0.32
4.7E+01
3.5E+01
6.8E-09
1.8E-03
108-88-3
Toluene
14
0.14
4.4E+03
6.4E-06
76-13-1
Trichloro-1,2,2-trifluoroethane, 1,1,2-
2.1
0.021
4.4E+03
9.6E-07
75-69-4
Trichlorofluoromethane
2.1
0.021
108-67-8
Trimeth lbenzene, 1,3,5-
1.3
0.013
5.3E+01
4.9E-05
1330-20-7
X lens
14.1
0.141
8.8E+01
3.2E-04
Cumulative: I 1.1E-07 I 3.5E-03
North Carolina DEQ Risk Calculator