22062_Smokey Hollow 2_VIR_20190331

R,DH/ \1
Environmental Consulting
4012 Ridgebrook Bluffs Dr. I Raleigh, NC 27603
[phone] 1 [e-mail]
VAPOR INTRUSION SOIL GAS SAMPLING REPORT
SMOKEY HOLLOW 2 SITE
N. WEST ST. AND N. HARRINGTON ST.
RALEIGH, NORTH CAROLINA
RDHEC PROJECT NO. 1907.00
Prepared for:
Aptus Management, PLLC
109 Amber Court
Carrboro, North Carolina 27510
Prepared by:
RDH Environmental Consulting
4012 Ridgebrook Bluffs Drive
Raleigh, North Carolina 27603
[phone]
March 31, 2019

R D I I L
Environmental Consulting
March 31, 2019
Mr. John Gallagher, P.E., RSM
President, Managing Director
Aptus Management, PLLC
109 Amber Court
Carrboro, North Carolina 27510
Subject: VAPOR INTRUSION SOIL GAS SAMPLING REPORT
SMOKEY HOLLOW 2 SITE
431, 437 AND 431 N. HARRINGTON STREET
NCBP PROJECT NO. 22062-18-092
RDHEC PROJECT NO. 1907.00
Dear Mr. Gallagher:
4012 Ridgebrook Bluffs Dr.
Raleigh, NC 27603
[phone]
[e-mail]
RDH Environmental Consulting (RDHEC) is pleased to provide the enclosed report for the vapor intrusion
(VI) sampling that was conducted at the above -referenced site on March 19, 2019. The project was
performed in accordance with the terms and conditions of RDHEC Proposal No. P1910 dated March 1,
2019, which was authorized by your text message on March 5, 2019.
The sampling was completed in general accordance with the March 18, 2019 Interim Soil Gas Site
Assessment Work Plan prepared by Aptus, which was submitted via email to Ms. Sharon Eckard of the NC
Brownfields Program and approved on that date. The findings from the sampling indicated minimal
detections of contaminants based on a full -list TO-15 analysis. Each detected analyte was well below the
February 2018 North Carolina VI screening levels for soil gas at residential properties (the highest
concentration detected was m&p xylene at SG-3 at 2.7% of the screening level). Consequently, the risk
from VI regarding the proposed building construction is negligible/acceptable, per current guidance from
the Division of Waste Management, which the Brownfields Program references for such assessments.
If you have any questions regarding the report or associated documentation, please feel free to contact
me at [phone] at your convenience.
Sincerely,
RDH FNVIRONMJENTAL`CONSULTING
'�'44'4
Robert D. Hill, P.E.
Principal Consultant
Enclosure
���

TABLE OF CONTENTS
1.0 EXECUTIVE SUMMARY............................................................................................ 1
2.0 INTRODUCTION...................................................................................................... 2
3.0 TESTING SUMMARY................................................................................................ 2
PROBE LOCATIONS/PLACEMENT (3/18/2019)............................................................................. 2
SAMPLING(3/19/2019).......................................................................................................... 3
4.0 SOIL GAS SAMPLING RESULTS.................................................................................. 5
5.0 CONCLUSIONS/RECOMMENDATIONS...................................................................... 5
6.0 CLOSING................................................................................................................ 6
TABLES
Boring/Slab Details at Sampling Locations..................................................................................... 2
Shut -In Test / Leak Check Details During Sampling........................................................................ 4
Post -Sampling Leak Check Details.................................................................................................. 4
Table 1 - Laboratory Results from Sub -Slab Soil Gas Sampling on 3/19/2019.............. Attachment
Table 2 - Laboratory Results from Sub -Slab Soil Gas Sampling on 3/19/2019 (DETECTIONS ONLY)
................................................................................................................ Attachment
DRAWINGS
1 Site Location Map
2 Site Map with Parcel Overlay
3 Soil Gas Sampling Locations
4 Soil Gas Sampling Locations (w/Tabulated Lab Result)
APPENDICES
Appendix A March 18, 2019 Interim Soil Gas Site Assessment Work Plan
Appendix B Photographs
Appendix C NCDWM Residential Vapor Intrusion Screening Levels Table (February 2018)
Appendix D Laboratory Report and Chain of Custody Form
Appendix E NCDEQ Risk Calculator Results (Resident Soil Gas to Indoor Air pathway for Vapor
Intrusion)

1.0 EXECUTIVE SUMMARY
Pursuant to NC Brownfields Project No: 22062-18-092, RDHEC conducted vapor intrusion (VI)
sampling on March 19, 2019 at the proposed Smokey Hollow 2 (SH2) site located at 431, 437
and 431 N. Harrington Street in Raleigh, Wake County, North Carolina (see Drawing 1— Site
Location Map and Drawing 2 — Site Map with Parcel Overlay, attached). The sampling was
required by the North Carolina Division of Environmental Quality (NCDEQ) Division of Waste
Management (NCDWM) Brownfields Program prior to construction on the site. The sampling
involved collection of six (6) sub -slab soil gas canister samples from five locations (one of the
locations, SS-2, included a duplicate sample), per the work plan and in accordance with DWM VI
guidance'. The soil gas sampling locations are shown in Drawing 3 and the tabulated laboratory
results are provided in Drawing 4. A copy of the work plan is included in Appendix A.
Photographs from the sampling are included in Appendix B.
The results of the EPA Method TO-15 analyses were compared to the NCDEQ's February 2018
list of Residential VI Soil Gas Screening Levels (RSGSLs, attached in Appendix C) upon receipt of
the laboratory report (Appendix D). Twenty-two (22) analytes were detected and the
concentrations of each were less than 3% of the respective RSGSLs (five detected analytes had
no RSGSL). These results are provided in Table 1 (attached) and included on Drawing 4 for quick
reference.
The guidance for soil gas data evaluation and screening states, "If soil gas concentrations do
NOT EXCEED the SGSLs, typically no further investigation is necessary and the VI pathway may
be considered incomplete if the investigator is confident in the CSM and the data collected are
adequate to evaluate the VI pathway. The SGSLs are expected to be conservative due to a
generic default attenuation factor."
The highest concentration of each of the detected analytes was entered into the NCDEQ Risk
Calculator to determine the Resident Soil Gas to Indoor Air risk from VI via this pathway (see
Appendix E). The cumulative cancer risk and non -cancer hazard quotient were found to be 3.9E-
7 and 2.8E-2, respectively. These values confirm the risk from the detected analytes for VI is lower
than that which is the basis of the RSGSLs.
The risk of VI appears negligible for future occupants of the site following development, based
on the findings from this sampling effort (less than 3% of the residential SGSLs and acceptable
cumulative risk). Thus, per current regulatory guidance, no further assessment is required or
recommended.
1 NCDEQ DWM VAPOR INTRUSION GUIDANCE document dated March 16, 2018, page 32.

Vapor Intrusion Soil Gas Sampling Report
Smokey Hollow 2 Site
Raleigh, North Carolina
2.0 INTRODUCTION
March 31, 2019
Page 2
The SH2 site is comprised of multiple parcels across approximately 3.6 acres slated for high -
density redevelopment. All existing buildings and improvements had been demolished at the
time of RDHEC's soil gas testing and only slab foundations or asphalt parking remained. As a
condition of construction approval, Aptus was requested to perform soil, groundwater, and sub -
slab soil gas sampling to determine potential exposure to future occupants of the building. A
work plan specific to the soil gas sampling for VI assessment was submitted on March 18, 2019
detailing the testing and approved on that date. This report summarizes the VI sampling activities
that were conducted at the site in accordance with the work plan, as well as the laboratory results
and conclusions based on the findings.
3.0 TESTING SUMMARY
Probe Locations/Placement (3/18/2019)
Upon notice of work plan approval on March 18, 2019, RDHEC contacted personnel from the
General Contractor (Clancy & Theys) to arrange site access. It was found that most of the site is
now used for parking by contractors/trades working at the adjacent Smokey Hollow construction
site. Consequently, RDHEC determined the coordinates of the sample locations, obtained
supplies, and mobilized that evening to locate the sampling points, place the Vapor Pin° sampling
probes, and cordon off the locations to prevent parking in these areas the next day.
Shortly after arrival at 6:50 pm, the sampling points were marked via GPS coordinates. A portable
generator provided power for a hammer drill that was used to bore 5/8-inch holes in the concrete
slabs and asphalt pavement. Vapor Pins fitted with silicone sleeves were secured into each boring
using a special tool and rubber hammer, then capped. Details regarding each boring are noted in
the table below.
Boring/Slab Details at Sampling Locations
Sample Location
SG-1
SG-2
SG-3
SG-4
SG-5
Boring Depth
12"
12"
12"
12"
12"
Medium
Concrete
Asphalt
Asphalt
Concrete
Asphalt
Slab Thickness
5"
5.5"
5"
4"
6"
Sub -Slab Conditions
Clay
Clay
Clay
Stone/
Gravel
Clay
The five locations were cordoned with pipe and caution tape and the Vapor Pin probe locations
were covered with safety cones. The locations and coordinates are shown on Drawing 3. While
the work plan required that the probe locations equilibrate for one to two hours, they were left
overnight to be sampled the next day (due to the late hour and darkness after 9:00 pm).

Vapor Intrusion Soil Gas Sampling Report
Smokey Hollow 2 Site
Raleigh, North Carolina
March 31, 2019
Page 3
Meteorological conditions from the time of probe placement through sampling included clear/
partly cloudy skies and slight winds with periodic gusts from 5 to 7 mph. Temperatures ranged from
57 °F at the time of arrival to a low of 36 °F overnight (average 47 °F), with relative humidity ranging
from 29 to 89% (average 58%), based on a nearby personal weather station (station ID
KNCRALE1382) located approximately 4 blocks north of the site on N. West Street. According to the
weather station, barometric pressure was nearly constant, ranging between 30.33 to 30.61 inches
during the testing (average 30.51 inches). The last rain event at the site occurred well before the
testing date (0.03 inches on Friday, March 15t"). Thus, there was no significant precipitation within
12 hours prior to (or during) the sampling event to induce pressure gradients that might affect soil
VI.
Sampling (3/19/2019)
RDHEC arrived at the site at 12:45 pm to initiate the sampling. Numerous cars had parked on the
various slab and asphalt areas. Someone had moved the barriers and cone at the SG-4 location
and parked directly over the probe site. Similarly, location SG-5 had the barriers removed but the
probe was accessible. A large excavator had been delivered and was parked at the SG-1 location,
but the bucket and boom had been lowered such that the probe was still accessible. None of the
Vapor Pins were disturbed or damaged, however, and the caps were still intact. Sampling
commenced at the SG-3 location and continued until the vehicle departed from the SG-4 location.
The samples were collected using 1/4-inch rigid Teflon tubing and 3-L Summa canisterS2. Small 1-
to 2-inch pieces of 1/4-inch and 3/8- inch silicone tubing were employed to make connections to
the various valves and fittings of the sampling trains. Tubing was connected to the barbed fittings
of the Vapor Pins, routed through a plastic shroud (which was placed over each probe site) and
the opposite ends connected to 3-way valves and 60-milliliter (mQ syringes to form a sampling
train for each probe location.
Shut-in tests were performed to ensure air tight conditions at each location. Per the work plan,
once the sampling train was deemed leak -free, the probe tubing was purged of three dead
volumes using a 60-mL syringe and leak checked while the shroud was filled with helium. With
1.5 feet of 1/4-Inch tubing (inner diameter of 0.177 inches), three dead volumes equaled 22 mL.
(Note — 120 to 180 mLs were slowly purged using the syringe to allow for sufficient volume for
the helium leak check, described below).
The helium concentrations within the shroud were measured and noted using a MGD-2002 leak
detector. The purged soil gas was collected into a 0.5-L Tedlar bag via the 3-way valve. After
purging, the Tedlar bag was removed and the contents monitored for helium levels. A successful
leak check was deemed when the purged soil gas contained less than 10% of the initial shroud
concentration of helium. Each of the purged helium concentrations were 0 ppm except for SG-3,
2 The work plan designated 1- or 6-L Summa canisters for the sampling; however, due to limited availability of this
size media at the time of the lab shipment, 3-L canisters were substituted. Since the testing involved soil gas,
reporting limits remained acceptable/well below screening level criteria.
��TL7

Vapor Intrusion Soil Gas Sampling Report
Smokey Hollow 2 Site
Raleigh, North Carolina
March 31, 2019
Page 4
which exhibited 75 ppm (0.02%). Therefore leak -free conditions were achieved, and no
adjustments were necessary (see summary table below).
Shut -In Test / Leak Check Details During Sampling
Sample Location
SG-1
SG-2 (Dup)
SG-3
SG-4
SG-5
Maintained Shut -In Vacuum
(5-Min Duration)
-21.5" Hg
-16.5" Hg
-16.0" Hg
-20.0" Hg
-21.0" Hg
Shroud Pre -Test
83.4% /
82.0% /
39.5% /
96.0% /
53.1% /
He Concentration
(%/ppm)
834,000 ppm
820,000 ppm
395,000 ppm
960,000 ppm
531,000 ppm
Purge He Concentration
(Ppm)
0 ppm
0 ppm
75 ppm
0 ppm
0 ppm
Each of soil gas samples was collected using 3-L canisters fitted with 15- to 30-min flow
regulators. The SS-2 sample location employed an inline tee and a single flow regulator to collect
a duplicate sample for quality assurance purposes, in accordance with Brownfields Program
guidance, for a total of six (6) soil gas samples/analyses.
Following completion of the sampling, post -sampling leak checks were performed again at each
location using helium. After a successful post -sampling leak check, the probe tubing and Vapor
Pins were removed from each location. The post -sampling leak check summary is below.
Post -Sampling Leak Check Details
Sample Location
SG-1
SG-2 (Dup)
SG-3
SG-4
SG-5
Shroud Post -Test He
85.9% /
76.9% /
42.5% /
87.1% /
48.4% /
Concentration
(%/Ppm)
859,000 ppm
769,000 ppm
425,000 ppm
871,000 ppm
484,000 ppm
Purge He Concentration
(Ppm)
0 ppm
325 ppm
0 ppm
0 ppm
25 ppm
Due to soil and groundwater sampling planned the next day, the probe borings were not grouted,
however, they were covered with a safety cone and cordoned off to prevent parked cars from
blocking access.
The laboratory analysis request forms were then completed for laboratory analysis using EPA
Compendium Method TO-15 "Determination of Volatile Organic Compounds (VOCs) in Air
Collected in Specially -Prepared Canisters and Analyzed by Gas Chromatography/Mass
Spectrometry (GC/MS)" and the canisters were placed back in the laboratory packaging for return
shipment. The full -list of TO-15 analytes was requested for low-level analysis. Since post -sampling
leak checks were conducted, helium analysis by the laboratory was not required. Since RDHEC
did not leave the site until 7:35 pm, the samples were taken to FeclEx the next day under proper
chain of custody for shipment.

Vapor Intrusion Soil Gas Sampling Report March 31, 2019
Smokey Hollow 2 Site Page 5
Raleigh, North Carolina
4.0 SOIL GAS SAMPLING RESULTS
Laboratory results for the soil gas analyses are summarized in Table 1, attached. Of the twenty-two
analytes that resulted in detectable quantities, five (5) of the compounds did not have a listed
RSGSL. The levels for the detected compounds were compared to the current (February 2018)
table of the NCDWM RSGSLs for sub -slab and exterior soil gas VI. None of the analytes exceeded its
respective RSGSL. Each concentration was minimal and well below the corresponding RSGSL for
the contaminants, ranging from 0.01% to 2.71% of the respective screening levels.
The highest concentrations of the detected compounds were entered into the DEQ Risk Calculator
to calculate the Resident Soil Gas to Indoor Air pathway for VI. The total cumulative cancer risk was
determined to be 3.9 x 10-7 and the cumulative hazard quotient was 0.028.
Sampling locations and detected analytes/screening level comparisons from Table 1 are also
included on the sample location map in Drawing 4. A copy of the NCDWM residential SGSLs table is
included in Appendix C. The laboratory report forthe soil gas samples is provided in Appendix D. The
printout from the risk calculator spreadsheet is included in Appendix E.
5.0 CONCLUSIONS/RECOMMENDATIONS
Based on the prior Phase I and II ESAs and the information provided in the Harrington St. BFA, the
known concerns at the SH2 site are from offsite releases, which have resulted in onsite groundwater
contamination at least in the southern part of Parcel 1 (413 North Harrington Street). Testing by
Mid -Atlantic Associates (MAA) noted benzene in groundwater at a temporary well that was above
2L standards but below residential and non-residential vapor intrusion screening levels.
The Phase I ESAs conducted for the remaining parcels (2 — 6) concluded there was the potential for
groundwater impacts and possible vapor intrusion risks due to offsite releases to the south and
west. These included a closed LUST incident at the former Norwood Oil property at 509 and 601 N.
West St., which abuts the redevelopment site to the west. The Norwood Oil incident has a No
Further Action finding and Notice of Residual Petroleum, which makes it a Controlled Recognized
Environmental Condition.
• The results from this current soil gas testing show that sub -slab concentrations are well
below NCDWM SGSLs for residential use (i.e., minimal VI risk since the levels of site COCs
were less than 3% of the RSGSLs).
• The results of the Risk Calculator, based on the highest concentrations of each detected
analyte, indicated the risk of VI from soil gas to the indoor air pathway is less than the criteria
that the RSGSLs are based upon.
• The low-level soil gas concentrations from this testing confirm MAA's conclusion that the
groundwater petroleum levels pose no VI risk.

Vapor Intrusion Soil Gas Sampling Report
Smokey Hollow 2 Site
Raleigh, North Carolina
March 31, 2019
Page 6
In summary, comparison of the soil gas testing results with current NCDWM guidance indicate that
there is not an unacceptable risk of VI at the SH2 site. Further, in conjunction with earlier soil and
groundwater investigations (additional lines of evidence), further VI assessment or the need to
consider mitigation does not appear warranted or necessary.
6.0 CLOSING
Thank you for allowing RDHEC to be of assistance with your VI testing needs. If you should have
questions regarding this submittal or associated documentation, please feel free to contact us at
[phone] at your convenience.
Sincerely,
RDH ENVIRONMENTAL CONSULTING
Robert D. Hill, PE
Principal Consulting Engineer
Attachments
cc: T. Proctor — PES
���

TABLES

Table 1 - Laboratory Results from Sub -Slab Soil Gas Sampling on 3/19/2019
Smokey Hollow 2 Site - Raleigh, North Carolina
RDHEC Project No. 1907.00
Residential
Vapor
Intrusion
SAMPLING LOCATION
Parameter
Screening
Levels
Residential
Soil -Gas
SG-1
SG-2A
SG-26
SG-3
SG-4
SG-S
u m3
Sampling Date/
3/19/2019
3/19/2019
3/19/2019
3/19/2019
3/19/2019
3/19/2019
Time
1818
1632
1632
1905
1634
1517
Sample Depth
1 Foot
1 Foot
1 Foot
1 Foot
1 Foot
1 Foot
ANALYSIS: EPA TO-15
Acetone
220,000
15
23
22
22
11
17
Benzene
120
<0.26
1
1.1
3.2
<0.21
2A
Benzyl chloride
7
<0.23
<0.23
<u.21J
<0.23
<0.23
<u.21)
Bromodichloromethane
25
<0.49
<0.49
<0.49
<0.49
<0.49
<0.49
Bromoform
850
<0.93
<0.93
<0.93
<0.93
<0.93
<0.93
Bromomethane
35
<0.53
<0.53
<0.53
<0.53
<0.53
<0.53
1,3-Butadiene
14
<0.28
<0.28
<0.28
<0.28
<0.28
<0.28
2-Butanone (MEK)
35000
2.6
6.5
6.4
12
2.5
8
Carbon Disulfide
4900
<U.40
<0.43
-U.40
<0.43
<0.43
'U.4-
Carbon Tetrachloride
160
<0.41
<0.41
<0.41
<0.41
<0.41
<0.41
Chlorobenzene
350
<0.45
<0.45
<0.45
<0.45
<0.45
<0.45
Chloroethane
70000
<0.32
<0.32
<0.32
<0.32
<0.32
<0.32
Chloroform
41
<0.36
<0.36
<0.36
<0.36
<0.36
<0.36
Chloromethane
630
<0.28
<0.28
<0.28
<0.28
<0.28
<0.28
Cyclohexane
42000
<0.49
<0.49
<0.49
<0.49
<0.49
<0.49
Dibromochloromethane
-
<0.57
<0.57
<0.57
<0.57
<0.57
<0.57
1,2-Dibromoethane (EDB)
1.6
<0.60
<0.60
<0.60
<0.60
<0.60
<0.60
1,2-Dichlorobenzene
1400
<0.58
<0.58
<0.58
<0.58
<0.58
<0.58
1,3-Dichlorobenzene
-
0.96
1.7
1.8
1.9
<0.62
1.7
1,4-Dichlorobenzene
85
<0.73
<0.73
Dichlorodifluoromethane (Freon 12)
700
2.1
2.1
2.1
2.1
8.1
2.8
1,1-Dichloroethane
580
<0.25
<0.25
1,2-Dichloroethane
36
<0.31
<0.31
<0.31
<0.31
<0.31
1,1-Dichloroethylene
1400
<0.32
<0.32
<0.32
<0.32
<0.32
cis- 1,2-Dichloroethylene
-
<0.32
<0.32
<0.32
<0.32
<0.32
trans- 1,2-Dichloroethylene
-
<0.32
0.48
<0.32
<0.32
<0.32
<0.32
1,2-Dichloropropane
28
<0.33
<0.33
<0.33
<0.33
<0.33
cis- 1,3-Dichloropropene
-
<0.32
<0.32
<0.32
<0.32
<0.32
<0.32
trans- 1,3-Dichloropropene
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114)
-
<0.70
<0.70
<0.70
<0.70
<0.70
<0.70
1,4-Dioxane
190
'4.6
<Z
<4.6
<4.6
Ethanol
-
200
13
13
14
140
25
Ethyl Acetate
490
4.2
2.9
<0.54
<0.54
Ethylbenzene
370
<0.50
1.5
1.4
4.4
<0.50
1.7
4-Ethyltoluene
-
<0.60
<0.60
2.1
<0.60
<0.60
Heptane
2800
<0.48
<0.48
0.62
1.4
<0.48
0.72
Hexachlorobutadiene
43
<0.98
<0.9p
<0.98
<0.98
Hexane
4900
<1.2
<1.2
<1.2
<1.2
<1.2
<1.2
2-Hexanone (MBK)
210
<0.49
<0.49
<n 49
<0.49
<0.49
<0.49
Isopropanol
1400
3
).60
1.2
<0.60
<0.60
<0.60
Methyl tert-Butyl Ether (MTBE)
3600
<0.36
<0.36
<0.36
<0.36
<0.36
<0.36
Methylene Chloride
4200
<0.84
<0.84
<0.84
<0.84
<0.84
<0.84
4-Methyl-2-pentanone (MIBK)
21000
<0.39
<0.39
<0.39
<0.39
<0.39
<0.39
Naphthalene
21
<0.80
<0.80
<0.80
<0.80
<0.80
<0.80
Propene
21000
<0.34
<0.34
<0.34
7.9
<0.34
<0.34
Styrene
7000
<0.53
<0.53
<0.53
<0.53
<0.53
<0.53
1,1,2,2-Tetrachloroethane
16
<0.61
<0.61
<0.61
<0.61
<0.61
Tetrachloroethylene
280
0.9
<r --
--
<0.75
1.1
-
Tetrahydrofuran
14000
2.6
15
16
31
1.9
15
Toluene
35000
1.6
15
13
19
1.6
8
1,2,4-Trichlorobenzene
14
<1.0
<1.0

Table 1 - Laboratory Results from Sub -Slab Soil Gas Sampling on 3/19/2019
Smokey Hollow 2 Site - Raleigh, North Carolina
RDHEC Project No. 1907.00
Residential
Vapor
Intrusion
SAMPLING LOCATION
Parameter
Screening
Levels
Residential
Soil -Gas
SG-1
SG-2A
SG-26
SG-3
SG-4
SG-S
u m3
Sampling Date/
3/19/2019
3/19/2019
3/19/2019
3/19/2019
3/19/2019
3/19/2019
Time
1818
1632
1632
1905
1634
1517
Sample Depth
1 Foot
1 Foot
1 Foot
1 Foot
1 Foot
1 Foot
ANALYSIS: EPA TO-15
1,1,1-Trichloroethane
35000
<0.41
<0.41
<0.41
<0.41
1,1,2-Trichloroethane
1.4
<0.45
<>
<0.45
<0.45
<
<0.45
Trichloroethylene
14
<0.43
<0.43
<0.43
<0.43
<
<0.43
Trichlorofluoromethane (Freon 11)
-
4.8
2.4
2.5
12
3100
3
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)
35000
<0.93
<0.93
<0.93
<0.93
<0.93
<0.93
1,2,4-Trimethylbenzene
420
<0.63
<0.63
3
8.9
<0.63
3.5
1,3,5-Trimethylbenzene
420
<0.62
<0.62
<0.62
1.9
<0.62
0.81
Vinyl Acetate
1400
<0.34
2.9
<0.34
<0.34
2.3
<0.34
Vinyl Chloride
56
<0.32
<'
<0.32
<0.32
<0.32
<0.32
m&p-Xylene
700
1.2
5.6
5.5
19
<1.0
6.4
o-X lene
700
0.59
2.2
2.2
7
-^ r^
2.4
Notes: All laboratory TO-15 analytes are shown
* Comparison to February 2018 NCDEQ Residential Vapor Intrusion Screening Levels
(based on November 2017 USEPA Regional Screening Tables)
< Not detected above the lab reporting limit shown

Table 2 - Laboratory Results from Sub -Slab Soil Gas Sampling on 3/19/2019 (DETECTIONS ONLY)
Smokey Hollow 2 Site - Raleigh, North Carolina
RDHEC Project No. 1907.00
Residential
Vapor
Intrusion
SAMPLING LOCATION
Parameter
Screening
Levels
ResidentiL
Soil-GasG-1
SG-2A
SG-2B
SG-3
SG-4
SG-5
u m3
Sampling Date/
/2019
3/19/2019
3/19/2019
3/19/2019
3/19/2019
3/19/2019
Time
18
1632
1632
1905
1634
1517
Sample Depth
oot
1 Foot
1 Foot
1 Foot
1 Foot
1 Foot
ANALYSIS: EPA TO-15
Acetone
220,000
15
23
22
22
11
17
Benzene
120
1
1.1
3.2
<0.26
2.4
2-Butanone (MEK)
35000
2.6
6.5
6.4
12
2.5
8
1,3-Dichlorobenzene
-
0.96
1.7
1.8
1.9
<0.62
1.7
Dichlorodifluorom ethane (Freon 12)
700
2.1
2.1
2.1
2.1
8.1
2.8
trans- 1,2-Dichloroethylene
-
0.48
<0.32
Ethanol
-
200
13
13
14
140
25
Ethyl Acetate
490
<0.54
4.2
2.9
<0.54
<0.54
<0.54
Ethylbenzene
370
<0.50
1.5
1.4
4.4
<0.50
1.7
4-Ethyltoluene
-
<0.60
w.ou
3
2.1
<0.60
<0.60
Heptane
2800
<0.48
<0.48
0.62
1.4
<0.48
0.72
Isopropanol
1400
3
<0.60
1.2
<0 Fn
<0.60
<0.60
Propene
21000
<0.3•
<0.34
<0.34
7.9
<0.34
<0.,:
Tetrachloroethylene
280
0.9
<0.75
1.1
Tetrahydrofuran
14000
2.6
15
16
31
1.9
15
Toluene
35000
1.6
15
13
19
1.6
8
Trichlorofluorom ethane (Freon 11)
-
4.8
2.4
2.5
12
3100
3
1,2,4-Trim ethyl benzene
420
<0.6-
<0.63
3
8.9
<0.63
3.5
1,3,5-Trim ethyl benzene
420
<0.62
<0.62
1.9
<0.62
0.81
Vinyl Acetate
1400
2.9
2.3
m&p-Xylene
700
1.2
5.6
5.5
19
<1.0
6.4
o-Xylene
700
0.59
2.2
2.2
7
-r'.54
2.4
Notes: Only laboratory detected analytes are shown
* Comparison to February 2018 NCDEQ Residential Vapor Intrusion Screening Levels
(based on November 2017 USEPA Regional Screening Tables)
< Not detected above the lab reporting limit shown

DRAWINGS

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dwL p
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DRAWN.
BY:
DATE:
MAR 2019
RD
SITE MAP WITH PARCEL OVERLAY
SMOKEY HOLLOW 2 SITE
DRAFTING CHECK,
BY:
JOB NO:
1907.00
Environmental Consulting
413, 437 & 441 N.HARRINGTON ST.
RALEIGH, NORTH CAROLINA
ENGINEER CHECK
CAD #
1907-00-02
4012 Ridgebrook Bluffs Dr. I Raleigh, NC27603
NCBF PROJECT NO: 22062-18-092
BY:
APPROVED
[phone] 1 [e-mail]
BY:
DWG NO:
2
REFERENCE: IMAGERY SOURCE - iMAPS 3.0 City of Raleigh GIS & Wake County GIS (2018)

I
I
I
I I
I
I
ham'-=�
LEGEND
• SUB -SLAB SOIL GAS
SAMPLE LOCATION
ELEVATOR LOCATION
i L• '�� ��. l' rI `
Q ■a
I i flit •• —I
r
f �I , � II•.■
-----'--- e' • I
r--li • IT-111:
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1,
i
.L
SMOKEY HOLLOW 2 SITE
SOIL GAS SAMPLING LOCATION COORDINATES
ID
LATITUDE
LONGITUDE
SG-1
35.78673
-78.64541
SG-2
35.78644
-78.64536
SG-3
35.78587
-78.64544
SG-4
35.78655
-78.64483
SG-5
35.78582
-78.64479
0 30 60
SCALE: 1 IN = 60 FT
f
L
C A RO
o ' ESS
�: Q�43/31 /19
SEAL
16
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C A RO
o ' ESS
�: Q�43/31 /19
SEAL
16
J0,
,eFR T D.
;
DRAWN
BY:
DATE: MAR 2019
RD -F
SOIL GAS SAMPLE LOCATIONS
SMOKEY HOLLOW 2 SITE
DRAFTING CHECK
JOB NO: 1907.00
BY:
413437 & 441 N.HARRINGTON ST.
ENGINEER CHECK
CAD # 1907-00-03
Environmental Consulting
RALEIGH, NORTH CAROLINA
4012 Ridgebrook Bluffs Dr. I Ra[eigh, NC27603
NCBF PROJECT NO: 22062-18-092
BY:,
APPROVED
[phone] 1 [e-mail]
BY: .
DWG NO: 3
REFERENCE: IMAGERY SOURCES - Basemap - iMAPS 3.0 City of Raleigh GIS & Wake County GIS (2018); Overlay -Proposed Site, JDavis Grading Exhibit Drawing (Ver. 2019.02.20)

LEGEND
--�-- 4 !
• I k 6 SUB -SLAB SOIL GAS
a is 111
I ; I• tent I i` e SAMPLE LOCATION
1 1-
I
I V
i 1 ELEVATOR LOCATION
i I Lam.
_ VI
3�� I : III!'►ink1
I
its
It
h
tip
W
4 i w
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Ik
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r Tip.
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1i il: 1
1 ?
- ; 1
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� tf I I I❑ I C � n 1 }� _
` I
o / V/
MWEN
Residential
Vapor
Intrusion
SAMPLING LOCATION
Screening
Parameter
Levels
Residential
Soil -Gas
SG-1
SG-2A
SG-26
SG-3
SG-4
SG-5
ug/m3
SamplingDate/
3/19/2019
3/19/2019
3/19/2019
3/19/2019
3/19/2019
3/19/2019
Time
1818
1632
1632
1905
1634
1517
Sample Depth
1 Foot
1 Foot
1 Foot
1 Foot
1 Foot
1 Foot
ANALYSIS: EPA TO-15
Acetone
220,000
15
23
22
22
11
17
Benzene
120
<0.26
1
1.1
3.2
<0.26
2.4
2-Butanone (MEK)
35000
2.6
6.5
6.4
12
2.5
8
1,3-Dichlorobenzene
-
0.96
1.7
1.8
1.9
<0.62
1.7
Dichlorodifluoromethane (Freon 12)
700
2.1
2.1
2.1
2.1
8.1
2.8
trans-1,2-Dichloroethylene
-
<0.32
0.48
,2
<0.32
<0.32
<0.32
Ethanol
-
200
13
13
14
140
25
Ethyl Acetate
490
0.54
4.2
2.9
<0.54
<0.54
<0.54
Ethylbenzene
370
<0.50
1.5
1.4
4.4
<0.50
1.7
4-Ethyltoluene
-
<0.60
<0.60
<0.60
2.1
<0.60
<0.60
Heptane
2800
<0.48
<0.48
0.62
1.4
<0.48
0.72
Isopropanol
1400
3
<0.60
1.2
<0.60
<0.60
<0.60
Propene
21000
<0.34
<0.34
.4
7.9
<0'14
<0.34
Tetrachloroethylene
280
0.9
<0.75
75
<0.75
1.1
Tetrahydrofuran
14000
2.6
15
16
31
1.9
15
Toluene
35000
1.6
15
13
19
1.6
8
Trichlorofluoromethane (Freon 11)
-
4.8
2A
2.5
12
3100
3
1,2,4-Trimethylbenzene
420
<0.63
<0.63
3
8.9
<0.63
3.5
1,3,5-Trimethylbenzene
420
<0.62
<0.62
<U.ti2
1.9
<0.62
0.81
Vinyl Acetate
1400
<0.34
2.9
<0.34
<0.34
2.3
<0.34
m&p-Xylene
700
1.2
5.6
5.5
19
<1.0
6.4
o-Xylene
1 700
1 0.59
1 2.2
1 2.2
1 7
1 <0.54
1 2.4
Notes: Only laboratory detected analytes are shown
* Comparison to February 2018 NCDEQ Residential Vapor Intrusion Screening Levels
(based on November2017 USEPA Regional Screening Tables)
< Not detected above the lab reporting limitshown
N
0 30 60
SCALE: 1 IN = 60 FT
CAR 0•��i
FSSO .
Q� 3/31/19���i
SEAL
i� �016t .,1i.
�eER T D
r4#1811 n
DRAWN
BY:
DATE: MAR 2019
RD
SOIL GAS SAMPLE LOCATIONS
SMOKEY HOLLOW 2 SITE
DRAFTING CHECK,
JOB NO: 1907.00
BY:
413, 437 & 441 N.HARRINGTON ST.
ENGINEER CHECK
CAD # 1907-00-04
Environmental Consulting
RALEIGH, NORTH CAROLINA
4012 Ridgebrook Bluffs Dr. I Raleigh, NC27603
NCBF PROJECT NO: 22062-18-092
BY:
APPROVED
[phone] 1 [e-mail]
BY:
DWG NO: 4
REFERENCE: IMAGERY SOURCES - Basemap - i VIAPS 3.0 City of Raleigh GIS & Wake County GIS (2018); Overlay -Proposed Site, JDavis Grading Exhibit Drawing (Ver. 2019.02.20)

APPENDIX A
MARCH 18, 2019 INTERIM SOIL
GAS SAMPLING WORK PLAN

t-APTUSManagement, PLLC
March 18, 2019
Sharon Eckard
Project Manager, Brownfields Program
Division of Waste Management
North Carolina Department of Environmental Quality
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Subject: INTERMIM SOIL GAS SITE ASSESSMENT WORK PLAN
SMOKEY HOLLOW 2
NCBP PROJECT NO.22062-18-092
Dear Ms. Eckard:
Provided below is the soil gas portion of the Smokey Hollow 2 assessment work plan for your review. The
work will be conducted by RDH Environmental Consulting, NC Engineering License # F-1346, as a
subcontractor to Aptus Management, NC Engineering License # P-1130.
Soil Gas Testing
Sub -slab soil gas testing will be conducted in general accordance with the NCDWM's Vapor Intrusion
Guidance (Version 2, dated March 2018). We will collect five (5) sub -slab (sub -pavement) soil gas samples
beneath the existing slab foundations or paved areas at the locations shown in the attached figure. The
sampling points were selected to be in and around areas where elevators will eventually be installed, to assess
areas of concern and are intended to give good overall coverage to assess for possible vapor intrusion impacts
Rationale for Sampling Locations
• SG-1. This covers the old fur vault; elevator location and it is close to the old stream bed area.
And it is directly to the east of the Norwood Oil incident. This sampling location addresses
several AOCs.
• SG-2. Assess elevator location and possible impacts of electronic repair shop at 516 N West St.
• SG-3. This is directly to the east of the Former Creamery Garage and the soil gas would be in an
elevator location.
• SG-4. Elevator location
• SG-5. Northwest of the Wake Co. General Services UST incident and an elevator location.

Smokey Hollow 2 -Soil Gas Site Assessment Work Plan
Sub -Slab Soil Gas Sampling Details
March 18, 2019
Page 2
• A hammer drill will be used to bore 5/8-inch diameter holes through the slab to the soil beneath
(approximately 1-foot depth). Thickness of concrete slab or paving and underlying soils/fill material
depths/characteristics will be noted.
• Vapor Pins® fitted with silicone sleeves will be secured into each boring using a special tool and rubber
hammer. And each Vapor Pin location will be allowed to equilibrate for at least 1 to 2 hours.
The samples will be collected using 1/4-inch rigid Teflon tubing and 3-L Summa canisters (1-L or 6-
L canisters may be used, pending lab availability). Small 1- to 2-inch pieces of 1/4-inch and 3/8- inch
Tygon or silicone tubing will be employed to make connections to various valves and fittings of the
sampling trains. Tubing will be connected to the barbed fitting of the Vapor Pins, routed through a
plastic shroud (to be placed over the probe site) and the other end connected to a 3-way valve and 60-
milliliter (mL) syringe to form a sampling train for each sample location.
A shut-in test will be performed to ensure air tight conditions, in accordance with Vapor Intrusion
Pathway: A Practical Guideline (2007), Appendix D). Subsequently, once the sampling train is deemed
leak -free, the probe tubing will be purged of three dead volumes using a 60-ml syringe and leak
checked while the shroud is filled with helium. Assuming 1.5 feet of 1/4-inch tubing (inner diameter
of 0.177 inches), three dead volumes equals 22 mL. (Note - up to 120 mLs may be purged to ensure
sufficient volume for the helium leak check, described below).
The helium concentration within the shroud will be measured and noted using a MGD-2002 leak
detector (or equivalent monitor). The purged soil gas will be collected into a 0.5-L Tedlar bag. After
purging, the Tedlar bag will be removed and the contents monitored for helium levels. A successful
leak check is deemed when the purged soil gas contains less than 10% of the initial shroud
concentration of helium. If helium concentrations exceed 10% in the purged soil gas, adjustments will
be made to achieve leak -free conditions, and/or a new Vapor Pin location will be installed and tested.
• While the sampling train cannot be enclosed in the shroud for leak check purposes while operating the
syringe, the shut-in test provides assurance that the connections are leak free and the leak detector will
be used to spot check possible leaks at connection joints.
• If no leaks are detected, the canister sampling can begin at each of the sample locations.
• Each of soil gas samples will be collected using canisters fitted with 100 to 200 ml/min flow regulators
over a period of approximately five to 30 minutes (depending on the canister sizes).
• Following completion of sampling, a post -sampling helium leak check will be performed.
• After a successful leak check, the probe tubing and Vapor Pins will be removed from each and the
borings will be abandoned/closed by grouting the borings flush to the slab foundation level with
cement. At sub -slab soil gas sampling locations that will be used for temporary well locations,
abandonment will be completed in accordance with 15A NCAC 02C .0113 Abandonment of Wells
[15ANCAC 02C .0113(d)].
Soil Gas Anal
Upon completion of the sampling and probe finalization, laboratory analysis request forms will be prepared,
and the samples shipped under proper chain of custody for laboratory analysis using EPA Compendium Method
TO-15 "Determination of Volatile Organic Compounds (VOCs) in Air Collected in Specially -Prepared
Canisters and Analyzed by Gas Chromatography/Mass Spectrometry (GC/MS)". (Note — since a post -sampling
leak check will be conducted, helium analysis by the laboratory will not be required.)

Smokey Hollow 2 -Soil Gas Site Assessment Work Plan
March 18, 2019
Page 3
We will confirm that the certified lab reporting limits will meet the current Residential Vapor Intrusion
Screening Levels for Sub -Slab and Exterior Soil Gas. The full TO-15 list of analytes will be requested to be
analyzed for the soil gas samples plus one duplicate sample.
Soil Gas OA
Batch certification of canisters is proposed for this sampling work plan, since testing does not include indoor
air analysis. Per the Guidance, canister vacuum will be verified for each Summa canister, before and after
sample collection. If the initial vacuum prior to sampling is in excess of 10% lower than the vacuum
documented by the laboratory upon shipment, the canister will not be used. The post -sampling vacuum in
the canister will be recorded and noted on the analytical request form. Sampling will be completed when
the residual vacuum reaches -5 inches mercury in the canister. The canister vacuum will also be documented
by the lab upon receipt of the sample canisters.
One location for sub -slab soil gas sampling will involve collection of a duplicate canister, via connection
of two canisters with an inline stainless -steel tee and employing one 30-minute flow regulator. Using a 30-
minute flow regulator on a duplicate sample will allow for both canisters to be sampled over a 15-minute
period, which will be consistent for the other sample locations (when 3-L canisters are used.) Similar
methodology will be used for other canister sizes, pending laboratory availability.
CLOSING
Aptus appreciates the opportunity to provide this proposed assessment. If we can answer any questions or
provide additional information, please feel free to contact us at your convenience.
If you have any questions on the environmental -related work, please feel free to contact me.
Sincerely,
APTUS MANAGEMENT PLLC
John Gallagher, P.E., RSM
e9�19911°81A�//!
SEAL e
024199
klN;�A°��*
�sd B �• `i �� t
6d/ led
Cc, APTUS

APPENDIX B
PHOTOGRAPHS

_....
—
t
Truck parked over SGA location Excavator parked over SG-1 location
�y
h � �
Sampling train at SG-3 location Helium shroud leak check at SG-3 location
j �gppp0 tumauF cmoano caar�av
/ wcrmv —cuwaw cxxai'=rw�
Shut-in vacuum test at SG-3 location
Sampling train - SG-5 location
Sampling within cordon area — SG-3 location
1
Shut-in vacuum test - SG-5 location

1
Helium shroud leak check at SG-5 location Duplicate sampling train — SG-2 location
Helium shroud leak check at SG-1 location
PwW
Helium purge concentration - SG-1 location

Shut-in vacuum test - SG-4 location I Sampling train - SG-4 location
Helium shroud leak check at SG-4 location I Helium purse concentration - SG-4 location
shroud leak check - SG-4 location I Post -sampling purge concentration - SG-4 location

APPENDIX C
NCDWM RESIDENTIAL VAPOR INTRUSION SCREENING LEVELS TABLE
(FEBRUARY 2018)

North Carolina Department of Environmental Quality
Residential Vapor Intrusion Screening Levels
February 2018
(based on November 2017 USEPA Regional Screening Tables)
CAS #
Chemical Name:
Ground Water
Screening Level
(GWSL) ug/L
TCR=1.0E-05
THQ=0.2
Sub -slab and Exterior
Soil Gas Screening
Level (SGSL) ug/m'
TCR=1.0E-05
THQ=0.2
Basis
IASL (A) ug/ms
TCR=1.0E-06
THQ=0.2
Basis
IASL (B)
ng/m
TCR=1.0E-05
THQ=0.2
Basis
z
IASL (C)
ug/m
TCR=1.0E-04
THQ=0.2
Basis
Does Chemical
Have a Non-
Cancer Effect?'
30560-19-1
Acephate
75-07-0
Acetaldehyde
6.9E+02
6.3E+01
N
1.3E+00
C
1.9E+00
N
1.9E+00
N
Yes
34256-82-1
Acetochlor
67-64-1
Acetone
4.5E+06
2.2E+05
N
6.5E+03
N
6.5E+03
N
6.5E+03
N
Yes
75-86-5
Acetone Cyanohydrin
Not Volatile
Not Volatile
4.2E-01
N
4.2E-01
N
4.2E-01
N
Yes
75-05-8
Acemnitrile
8.9E+03
4.2E+02
N
1.3E+01
N
1.3E+01
N
1.3E+01
N
Yes
98-86-2
Acetophenone
53-96-3
Acetylaminofluorene, 2-
Not Volatile
Not Volatile
2.2E-03
C
2.2E-02
C
2.2E-01
C
107-02-8
Acrolein
8.4E-01
1.4E-01
N
4.2E-03
N
4.2E-03
N
4.2E-03
N
Yes
79-06-1
Acrylamide
Not Volatile
Not Volatile
1.0E-02
C
1.0E-01
C
1.0E+00
C
Yes
79-10-7
Acrylic Acid
1.4E+04
7.0E+00
N
2.1E-01
N
2.1E-01
N
2.1E-01
N
Yes
107-13-1
Acrylonitrile
7.3E+01
1.4E+01
C
4.1E-02
C
4.1E-01
C
4.2E-01
N
Yes
111-69-3
Adiponitrile
Not Volatile
Not Volatile
1.3E+00
N
1.3E+00
N
1.3E+00
N
Yes
15972-60-8
Alachlor
116-06-3
Aldicarb
1646-88-4
Aldicarb Sulfone
1646-87-3
Aldicarb sulfoxide
309-00-2
Aldrin
3.2E+00
1.9E-01
C
5.7E-04
C
5.7E-03
C
5.7E-02
C
107-18-6
Allyl Alcohol
1.0E+02
7.0E-01
N
2.1E-02
N
2.1E-02
N
2.1E-02
N
Yes
107-05-1
Allyl Chloride
4.6E-01
7.0E+00
N
2.1E-01
N
2.1E-01
N
2.1E-01
N
Yes
7429-90-5
Aluminum
Not Volatile
Not Volatile
1.0E+00
N
1.0E+00
N
1.0E+00
N
Yes
20859-73-8
Aluminum Phosphide
834-12-8
Ametryn
92-67-1
Aminobiphenyl, 4-
Not Volatile
Not Volatile
4.7E-04
C
4.7E-03
C
4.7E-02
C
591-27-5
Aminophenol, m-
95-55-6
Aminophenol, o-
123-30-8
Aminophenol,p-
33089-61-1
Amitraz
766441-7
Ammonia
1.6E+05
3.5E+03
N
1.0E+02
N
1.0E+02
N
1.0E+02
N
Yes
7773-06-0
Ammonium Sulfamate
75-854
Amyl Alcohol, tert-
1.1E+03
2.1E+01
N
6.3E-01
N
6.3E-01
N
6.3E-01
N
Yes
62-53-3
Aniline
Not Volatile
Not Volatile
2.1E-01
N
2.1E-01
N
2.1E-01
N
Yes
84-65-1
Anthmquinone, 9,10-
7440-36-0
Antimony (metallic)
1314-60-9
Antimony Pentoxide
1332-81-6
Antimony Tetroxide
1309-644
Antimony Trioxide
Not Volatile
Not Volatile
4.2E-02
N
4.2E-02
N
4.2E-02
N
Yes
7440-38-2
Arsenic, Inorganic
Not Volatile
Not Volatile
65E-04
C
3.1E-03
N
3.1E-03
N
Yes
778442-1
Arsine
Not Volatile
Not Volatile
LOE-02
N
1.0E-02
N
1.0E-02
N
Yes
3337-71-1
Asulam
1912-24-9
Atrazine
492-80-8
Auramine
Not Volatile
Not Volatile
1.1E-02
C
1.1E-01
C
1.1E+00
C
65195-55-3
AvermectinB1
86-50-0
Azinphos-methyl
Not Volatile
Not Volatile
2.1E+00
N
2.1E+00
N
2.1E+00
N
Yes
103-33-3
Azobenzene
1.6E+03
3.0E+01
C
9.1E-02
C
9.1E-01
C
9.1E+00
C
123-77-3
Azodicarbonamide
Not Volatile
Not Volatile
1.5E-03
N
1.5E-03
N
1.5E-03
N
Yes
7440-39-3
Barium
Not Volatile
Not Volatile
1.0E-01
N
1.0E-01
N
1.0E-01
N
Yes
186140-1
Benfluralin
17804-35-2
Benomyl
83055-99-6
Bensulfuron-methyl
25057-89-0
Bemazon
100-52-7
Benzaldehyde
7143-2
Benzene
1.6E+01
1.2E+02
C
3.6E-01
C
3.6E+00
C
6.3E+00
N
Yes
6369-59-1
Benzenediamine-2-methyl sulfate, 1,4
108-98-5
Benzenethiol
92-87-5
Benzidine
Not Volatile
Not Volatile
1.5E-05
C
1.5E-04
C
1.5E-03
C
65-85-0
Benzoic Acid
98-07-7
Benzotrichloride
100-51-6
Benzyl Alcohol
100-44-7
Benzyl Chloride
1.2E+01
7.0E+00
N
5.7E-02
C
2.1E-01
N
2.1E-01
N
Yes
744041-7
Beryllium and compounds
Not Volatile
Not Volatile
1.2E-03
C
4.2E-03
N
4.2E-03
N
Yes
42576-02-3
Bifenox
82657-04-3
Biphenthrin
92-524
Biphenyl, 1,1'-
6.6E+00
2.8E+00
N
8.3E-02
N
8.3E-02
N
8.3E-02
N
Yes
108-60-1
Bis(2-chloro-1-methylethyl) ether
111-91-1
Bis(2-chloroethoxy)methane
111-44-4
Bis(2-chloroethyl)ether
1.2E+02
2.8E+00
C
8.5E-03
C
8.5E-02
C
8.5E-01
C
542-88-1
Bis(chloromethyl)ether
2.5E-03
1.5E-02
C
4.5E-05
C
4.5E-04
C
4.5E-03
C
80-05-7
Bisphenol A
744042-8
Boron And Bomtes Only
Not Volatile
Not Volatile
4.2E+00
N
4.2E+00
N
4.2E+00
N
Yes
10294-34-5
Boron Trichloride
5.6E+00
1.4E+02
N
4.2E+00
N
4.2E+00
N
4.2E+00
N
Yes
7637-07-2
Boron Trifluoride
9.0E+01
N
2.7E+00
N
2.7E+00
N
2.7E+00
N
Yes
15541-45-4
Bromate
107-04-0
Bromo-2-chloroethane, 1-
1.3E+00
1.6E+00
C
4.7E-03
C
4.7E-02
C
4.7E-01
C
1073-06-9
Bromo-3-fluorobenzene,1-
460-00-4
Bromo-4-fluorobenzene, 1-
108-86-1
Bromobenzene
1.2E+02
4.2E+02
N
1.3E+01
N
1.3E+01
N
1.3E+01
N
Yes
74-97-5
Bromochloromethane
1.4E+02
2
1.3E+00N
8.3E+00
N
8.3E+00
Yes
Bromodichloromethane
8.8E+00
2.5E+175-274
C
7.6E-02
C
7.6E-01
C
7.6E+00
C
75-25-2
Bromoform
1.2E+03
8.5E+02
C
2.6E+00
C
2.6E+O1
C
2.6E+02
C
Page 1 0£ 11

North Carolina Department of Environmental Quality
Residential Vapor Intrusion Screening Levels
February 2018
(based on November 2017 USEPA Regional Screening Tables)
CAS #
Chemical Name:
Ground Water
Screening Level
(GWSL) ug/L
TCR=1.0E-05
THQ=0.2
Sub -slab and Exterior
Soil Gas Screening
Level (SGSL) ug/m'
TCR=1.0E-05
THQ=0.2
Basis
IASL (A) ug/ms
TCR=1.0E-06
THQ=0.2
Basis
IASL (B)
ng/m
TCR=1.0E-05
THQ=0.2
Basis
z
IASL (C)
ug/m
TCR=1.0E-04
THQ=0.2
Basis
Does Chemical
Have a Non-
Cancer Effect?'
74-83-9
Bromomethane
3.5E+00
3.5E+01
N
1.0E+00
N
1.0E+00
N
1.0E+00
N
Yes
2104-96-3
Bromophos
106-94-5
1 Bromopropane, 1-
7.0E+01
7.0E+02
N
2.1E+01
N
2.1E+01
N
2.1E+01
N
Yes
1689-84-5
Bromoxynil
1689-99-2
BromoxynilOctanoate
106-99-0
Butadiene, 1,3-
1.4E-01
1.4E+01
N
9.4E-02
C
4.2E-01
N
4.2E-01
N
Yes
94-82-6
Butanoic acid, 4-(2,4-
dichlorophenoxy)-
71-36-3
Butanol, N-
78-92-2
Butyl alcohol, sec-
1.7E+07
2.1E+05
N
6.3E+03
N
6.3E+03
N
6.3E+03
N
Yes
200841-5
Butylate
25013-16-5
Butylated hydroxyanisole
Not Volatile
Not Volatile
4.9E+01
C
4.9E+02
C
4.9E+03
C
128-37-0
Butylated hydroxytoluene
104-51-8
Butylbemmne, n-
135-98-8
Butylbenzene, sec-
98-06-6
Butylbenzene,tert-
75-60-5
Cacodylic Acid
744043-9
Cadmium (Diet)
Not Volatile
Not Volatile
1.6E-03
C
2.1E-03
N
2.1E-03
N
Yes
744043-9
Cadmium (Water)
Not Volatile
Not Volatile
1.6E-03
C
2.1E-03
N
2.1E-03
N
Yes
105-60-2
Caprolactam
Not Volatile
Not Volatile
4.6E-01
N
4.6E-01
N
4.6E-01
N
Yes
2425-06-1
Captafol
Not Volatile
Not Volatile
6.5E-02
C
6.5E-01
C
6.5E+00
C
133-06-2
Captan
Not Volatile
Not Volatile
4.3E+00
C
4.3E+01
C
4.3E+02
C
63-25-2
Carbaryl
1563-66-2
Carbofuran
75-15-0
Carbon Disulfide
2.5E+02
4.9E+03
N
1.5E+02
N
1.5E+02
N
1.5E+02
N
Yes
56-23-5
Carbon Tetrachloride
4.1E+00
1.6E+02
C
4.7E-01
C
4.7E+00
C
2.1E+01
N
Yes
463-58-1
Carbonyl Sulfide
8.4E-01
7.0E+02
N
2.1E+01
N
2.1E+01
N
2.1E+01
N
Yes
55285-14-8
Carbosulfan
5234-684
Carboxin
1306-38-3
Ceric oxide
Not Volatile
Not Volatile
1.9E-01
N
1.9E-01
N
1.9E-01
N
Yes
302-17-0
Chloral Hydrate
133-90-4
Chloramben
118-75-2
Chloranil
12789-03-6
Chlordane
7.3E+01
4.9E+00
N
2.8E-02
C
1.5E-01
N
1.5E-01
N
Yes
143-50-0
Chlordecone (Kepone)
Not Volatile
Not Volatile
6.1E-04
C
6.1E-03
C
6.1E-02
C
470-90-6
Chlorfenvinphos
90982-32-4
Chlorimuron, Ethyl-
7782-50-5
Chlorine
6.5E-02
1.0E+00
N
3.1E-02
N
3.1E-02
N
3.1E-02
N
Yes
10049-04-4
Chlorine Dioxide
2.5E-02
1.4E+00
N
4.2E-02
N
4.2E-02
N
4.2E-02
N
Yes
7758-19-2
Chlorite (Sodium Salt)
75-68-3
Chloro-1,l-difluoroethane, 1-
4.3E+03
3.5E+05
N
1.0E+04
N
1.0E+04
N
1.0E+04
N
Yes
126-99-8
Chloro-1,3-butadiene, 2-
4.1E-02
3.1E+00
C
9.4E-03
C
9.4E-02
C
9.4E-01
C
Yes
3165-93-3
Chloro-2-methylaniline HCl, 4-
95-69-2
Chloro-2-methylaniline, 4-
Not Volatile
Not Volatile
3.6E-02
C
3.6E-01
C
3.6E+00
C
107-20-0
Chloroacetaldehyde, 2-
79-11-8
Chloroacetic Acid
532-27-4
Chloroacetophenone, 2-
Not Volatile
Not Volatile
6.3E-03
N
6.3E-03
N
6.3E-03
N
Yes
106-47-8
Chloromiline, p-
108-90-7
Chlorobenzene
8.2E+01
3.5E+02
N
1.0E+01
N
1.0E+01
N
1.0E+01
N
Yes
98-66-8
Chlorobemmne sulfonic acid, p-
510-15-6
Chlorobenzilate
Not Volatile
Not Volatile
9.1E-02
C
9.1E-01
C
9.1E+00
C
74-11-3
Chlorobenzoic Acid, p-
98-56-6
Chlorobenzotrifluoride, 4-
4.4E+O1
2.1E+03
N
6.3E+01
N
6.3E+01
N
6.3E+01
N
Yes
109-69-3
Chlorobutane, 1-
7545-6
Chlorodifluoromethane
6.3E+03
3.5E+05
N
1.0E+04
N
1.0E+04
N
1.0E+04
N
Yes
107-07-3
Chloroethanol, 2-
67-66-3
Chloroform
8.1E+00
4.1E+01
C
1.2E-01
C
1.2E+00
C
1.2E+01
C
Yes
74-87-3
Chloromethane
5.2E+01
6.3E+02
N
1.9E+01
N
1.9E+01
N
1.9E+01
N
Yes
107-30-2
Chloromethyl Methyl Ether
3.3E+00
1.4E+00
C
4.1E-03
C
4.1E-02
C
4.1E-01
C
88-73-3
Chloronitrobenzene, o-
Not Volatile
Not Volatile
2.1E-03
N
2.1E-03
N
2.1E-03
N
Yes
100-00-5
Chloronitrobenzene, p-
Not Volatile
Not Volatile
4.2E-01
N
4.2E-01
N
4.2E-01
N
Yes
95-57-8
Chlorophenol, 2-
76-06-2
Chloropicrin
1.0E+00
2.8E+00
N
8.3E-02
N
8.3E-02
N
8.3E-02
N
Yes
189745-6
Chlorothalonil
Not Volatile
Not Volatile
3.2E+00
C
3.2E+01
C
3.2E+02
C
9549-8
Chlorotoluene, o-
106-43-4
Chlorotoluene, p-
54749-90-5
Chlorozotocin
Not Volatile
Not Volatile
4.1E-05
C
4.1E-04
C
4.1E-03
C
101-21-3
Chlorpropham
2921-88-2
Chlorpyrifos
5598-13-0
Chlorpyrifos Methyl
64902-72-3
Chlorsulfuron
1861-32-1
Chlorthal-dimethyl
60238-56-4
Chlorthiophos
16065-83-1
Chromium(III), Insoluble Salts
18540-29-9
Chromium(VI)
Not Volatile
Not Volatile
1.2E-05
C
1.2E-04
C
1.2E-03
C
Yes
744047-3
Chromium, Total
74115-24-5
Clofentezine
7440484
Cobalt
Not Volatile
Not Volatile
3.1E-04
C
1.3E-03
N
1.3E-03
N
Yes
800745-2
Coke Oven Emissions
3.6E-02
5.5E-01
C
1.6E-03
C
1.6E-02
C
1.6E-01
C
7440-50-8
Copper
108-39-4
Cresol, m-
Not Volatile
I Not Volatile
1.3E+02
N
1.3E+02
N
1.3E+02
N
Yes
Page 2 of 11

North Carolina Department of Environmental Quality
Residential Vapor Intrusion Screening Levels
February 2018
(based on November 2017 USEPA Regional Screening Tables)
CAS #
Chemical Name:
Ground Water
Screening Level
(GWSL) ug/L
TCR=1.0E-05
THQ=0.2
Sub -slab and Exterior
Soil Gas Screening
Level (SGSL) ug/m'
TCR=1.0E-05
THQ=0.2
Basis
IASL (A) ug/ms
TCR=1.0E-06
THQ=0.2
Basis
IASL (B)
ng/m
TCR=1.0E-05
THQ=0.2
Basis
z
IASL (C)
ug/m
TCR=1.0E-04
THQ=0.2
Basis
Does Chemical
Have a Non-
Cancer Effect?'
9548-7
Cresol, o-
Not Volatile
Not Volatile
1.3E+02
N
1.3E+02
N
1.3E+02
N
Yes
106-44-5
Cresol, p-
Not Volatile
Not Volatile
1.3E+02
N
1.3E+02
N
1.3E+02
N
Yes
59-50-7
1 Cresol, p-chloro-m-
1319-77-3
Cresols
Not Volatile
Not Volatile
1.3E+02
N
1.3E+02
N
1.3E+02
N
Yes
123-73-9
Crotonaldehyde,trans-
98-82-8
Cumene
1.8E+02
2.8E+03
N
8.3E+01
N
8.3E+01
N
8.3E+01
N
Yes
135-20-6
Cupfermn
Not Volatile
Not Volatile
4.5E-02
C
4.5E-01
C
4.5E+00
C
21725-46-2
Cyanazine
Cyanides
592-01-8
-Calcium Cyanide
544-92-3
-Copper Cyanide
57-12-5
-Cyanide (CN-)
4.0E+01
5.6E+00
N
1.7E-01
N
1.7E-01
N
1.7E-01
N
Yes
460-19-5
-Cyanogen
506-68-3
-Cyanogen Bromide
506-77-4
-Cyanogen Chloride
74-90-8
-Hydrogen Cyanide
3.1E+01
5.6E+00
N
1.7E-01
N
1.7E-01
N
1.7E-01
N
Yes
151-50-8
-Potassium Cyanide
506-61-6
-Potassium Silver Cyanide
506-64-9
-Silver Cyanide
143-33-9
-Sodium Cyanide
E1790664
-Thiocyanates
463-56-9
-Thiocyanic Acid
557-21-1
-Zinc Cyanide
110-82-7
Cyclohexane
2.0E+02
4.2E+04
N
1.3E+03
N
1.3E+03
N
1.3E+03
N
Yes
87-84-3
Cyclohexane, 1,2,3,4,5-pentabromo-6
chloro-
108-94-1
Cyclohexanone
4.0E+05
4.9E+03
N
1.5E+02
N
1.5E+02
N
1.5E+02
N
Yes
110-83-8
Cyclohexee
1.1E+02
7.0E+03
N
2.1E+02
N
2.1E+02
N
2.1E+02
N
Yes
108-91-8
Cyclohexylamine
68359-37-5
Cyfluthrin
68085-85-8
Cyhalothrin
52315-07-8
Cypemrethrin
66215-27-8
Cyromazine
72-54-8
DDD, p,p'-(DDD)
Not Volatile
Not Volatile
4.1E-02
C
4.1E-01
C
4.1E+00
C
72-55-9
DDE, p,p'-
1.7E+02
9.6E+00
C
2.9E-02
C
2.9E-01
C
2.9E+00
C
50-29-3
DDT
Not Volatile
Not Volatile
2.9E-02
C
2.9E-01
C
2.9E+00
C
75-99-0
Dalapon
1596-84-5
Daminozide
Not Volatile
Not Volatile
5.5E-01
C
5.5E+00
C
5.5E+01
C
1163-19-5
Decabromodiphenyl ether,
2,2',3,3',4,4',5,5',6,6'- (BDE-209)
806548-3
Demeton
103-23-1
Di(2-ethylhexyl)adipate
2303-164
Diallate
333-41-5
Diazinon
132-65-0
Dibenzothiophene
96-12-8
Dibromo-3-chloropropme, 1,2-
2.8E-01
5.6E-02
C
1.7E-04
C
1.7E-03
C
1.7E-02
C
Yes
108-36-1
Dibromobenzene,l,3-
106-37-6
Dibromobenzene,l,4-
124-48-1
Dibromochloromethane
106-93-4
Dibromoethane, 1,2-
1.8E+00
1.6E+00
C
4.7E-03
C
4.7E-02
C
4.7E-01
C
Yes
74-95-3
Dibromomethane (Methylene
Bromide)
2.5E+01
2.8E+01
N
8.3E-01
N
8.3E-01
N
8.3E-01
N
Yes
E1790660
Dibutyltin Compounds
1918-00-9
Dicamba
764-41-0
Dichloro-2-butene, 1,4-
1.9E-02
2.2E-01
C
6.7E-04
C
6.7E-03
C
6.7E-02
C
1476-11-5
Dichloro-2-butene, cis-1,4-
2.5E-01
2.2E-01
C
6.7E-04
C
6.7E-03
C
6.7E-02
C
110-57-6
Dichloro-2-butene, trans-1,4-
2.5E-01
2.2E-01
C
6.7E-04
C
6.7E-03
C
6.7E-02
C
7943-6
Dichloroacetic Acid
95-50-1
Dichlorobenzene, 1,2-
5.3E+02
1.4E+03
N
4.2E+01
N
4.2E+01
N
4.2E+01
N
Yes
106-46-7
Dichlorobenzene, 1,4-
2.6E+O1
8.5E+01
C
2.6E-01
C
2.6E+00
C
2.6E+O1
C
Yes
91-94-1
Dichlorobenzidine, 3,3'-
Not Volatile
Not Volatile
8.3E-03
C
8.3E-02
C
8.3E-01
C
90-98-2
Dichlorobenzophenone, 4,4'-
75-71-8
Dichlorodifluoromethane
1.5E+00
7.0E+02
N
2.1E+01
N
2.1E+01
N
2.1E+01
N
Yes
75-34-3
Dichloroethane, 1,1-
7.6E+O1
5.8E+02
C
1.8E+00
C
1.8E+01
C
1.8E+02
C
107-06-2
Dichloroethane, 1,2-
2.2E+01
3.6E+O1
C
1.1E-01
C
1.1E+00
C
1.5E+00
N
Yes
75-354
Dichloroethylene, 1,1-
3.9E+01
1.4E+03
N
4.2E+01
N
4.2E+01
N
4.2E+01
N
Yes
156-59-2
Dichloroethylene, 1,2-cis-
156-60-5
Dichloroethylene, 1,2-trans-
120-83-2
Dichlorophenol,2,4-
94-75-7
Dichlorophenoxy Acetic Acid, 2,4-
78-87-5
Dichloropropane, 1,2-
7.2E+00
2.8E+01
N
7.6E-01
C
8.3E-01
N
8.3E-01
N
Yes
142-28-9
Dichloropropane, 1,3-
616-23-9
Dichloropropanol, 2,3-
542-75-6
Dichloropropee, 1,3-
2.9E+01
1.4E+02
N
7.0E-01
C
4.2E+00
N
4.2E+00
N
Yes
62-73-7
Dichlorvos
Not Volatile
Not Volatile
3.4E-02
C
1.0E-01
N
1.0E-01
N
Yes
141-66-2
Dicrotophos
77-73-6
Dicyclopentadiene
2.4E-02
2.1E+00
N
6.3E-02
N
6.3E-02
N
6.3E-02
N
Yes
60-57-1
Dieldrin
Not Volatile
Not Volatile
6.1E-04
C
6.1E-03
C
6.1E-02
C
E17136615
Diesel Engine Exhaust
Not Volatile
Not Volatile
9.4E-03
C
9.4E-02
C
9.4E-01
C
Yes
111-42-2
Diethanolamine
Not Volatile
Not Volatile
4.2E-02
N
4.2E-02
N
4.2E-02
N
Yes
112-34-5
Dethylene Glycol Monobutyl Ether
Not Volatile
Not Volatile
2.1E-02
N
2.1E-02
N
2.1E-02
N
Yes
Page 3 of 11

North Carolina Department of Environmental Quality
Residential Vapor Intrusion Screening Levels
February 2018
(based on November 2017 USEPA Regional Screening Tables)
CAS #
Chemical Name:
Ground Water
Screening Level
(GWSL) ug/L
TCR=1.0E-05
THQ=0.2
Sub -slab and Exterior
Soil Gas Screening
Level (SGSL) ug/m'
TCR=1.0E-05
THQ=0.2
Basis
IASL (A) ug/ms
TCR=1.0E-06
THQ=0.2
Basis
IASL (B)
ng/m
TCR=1.0E-05
THQ=0.2
Basis
z
IASL (C)
ug/m
TCR=1.0E-04
THQ=0.2
Basis
Does Chemical
Have a Non-
Cancer Effect?'
111-90-0
Diethylene Glycol Monoethyl Ether
Not Volatile
Not Volatile
6.3E-02
N
6.3E-02
N
6.3E-02
N
Yes
617-84-5
Diethylfomramide
56-53-1
1 Diethylstilbestrol
Not Volatile
Not Volatile
2.8E-05
C
2.8E-04
C
2.8E-03
C
43222-48-6
Difenzoquat
35367-38-5
Diflubenzuron
75-37-6
Difluoroethane, 1,1-
1.0E+04
2.8E+05
N
8.3E+03
N
8.3E+03
N
8.3E+03
N
Yes
420-45-1
Diflucropropane, 2,2-
3.0E+02
2.1E+05
N
6.3E+03
N
6.3E+03
N
6.3E+03
N
Yes
94-58-6
Dihydrosafrole
4.3E+03
7.2E+01
C
2.2E-01
C
2.2E+00
C
2.2E+01
C
108-20-3
Diisopropyl Ether
1.4E+03
4.9E+03
N
1.5E+02
N
1.5E+02
N
1.5E+02
N
Yes
1445-75-6
Diisopropyl Methylphosphonate
55290-64-7
Dimethipin
60-51-5
Dimethoate
119-90-4
Dimethoxybenzidine,3,3'-
756-79-6
Dimethyl methylphosphonate
60-11-7
Dimethylamino azobenzene rp-1
Not Volatile
Not Volatile
2.2E-03
C
2.2E-02
C
2.2E-01
C
21436-96-4
Dimethylaniline 140, 2,4-
95-68-1
Dimethylaniline, 2,4-
121-69-7
Dimethylaniline, N,N-
119-93-7
Dimethylbenzidine, 3,3'-
68-12-2
Dimethylformamide
2.1E+06
2.1E+02
N
6.3E+00
N
6.3E+00
N
6.3E+00
N
Yes
57-14-7
Dimethylhydrazine, 1,1-
7.9E-01
1.4E-02
N
4.2E-04
N
4.2E-04
N
4.2E-04
N
Yes
540-73-8
Dimethylhydrazine, 1,2-
6.2E+01
5.8E-03
C
1.8E-05
C
1.8E-04
C
1.8E-03
C
105-67-9
Dimethylphenol, 2,4-
576-26-1
Dimethylphenol, 2,6-
95-65-8
Dimethylphenol, 3,4-
513-37-1
Dimethylvinylchloride
4.5E+01
7.2E+01
C
2.2E-01
C
2.2E+00
C
2.2E+01
C
534-52-1
Dinitro-o-cresol, 4,6-
131-89-5
Dinitro-o-cyclohexyl Phenol,4,6-
528-29-0
Dinitrobenzene,l,2-
99-65-0
Dinitrobenzene,l,3-
100-25-4
Dinitrobenzene,l,4-
51-28-5
Dinitrophenol, 2,4-
E1615210
Dinitrotoluene Mixture, 2,4/2,6-
121-14-2
Dinitrotoluene, 2,4-
Not Volatile
Not Volatile
3.2E-02
C
3.2E-01
C
3.2E+00
C
606-20-2
Dinitrotoluene, 2,6-
35572-78-2
Dinitrotoluene, 2-Amino-4,6-
19406-51-0
Dinitrotoluene, 4-Amino-2,6-
25321-14-6
Dinitrotoluene, Technical grade
88-85-7
Dinoseb
123-91-1
Dioxane, 1,4-
2.9E+04
1.9E+02
C
5.6E-01
C
5.6E+00
C
6.3E+00
N
Yes
Dioxins
-Hexachlorodibenzo-p-dioxin,
Mixture
Not Volatile
Not Volatile
2.2E-06
C
2.2E-05
C
2.2E-04
C
1746-01-6
-TCDD, 2,3,7,8-
3.6E-04
2.5E-05
C
7.4E-08
C
7.4E-07
C
7.4E-06
C
Yes
957-51-7
Diphenamid
101-84-8
Diphenyl Ether
7.3E+00
2.8E+00
N
8.3E-02
N
8.3E-02
N
8.3E-02
N
Yes
127-63-9
Diphenyl Sulfone
122-39-4
Diphenylamine
122-66-7
Diphenylhydrazine, 1,2-
Not Volatile
Not Volatile
1.3E-02
C
1.3E-01
C
1.3E+00
C
85-00-7
Diquat
1937-37-7
Direct Black 38
Not Volatile
Not Volatile
2.0E-05
C
2.0E-04
C
2.0E-03
C
260246-2
Direct Blue 6
Not Volatile
Not Volatile
2.0E-05
C
2.0E-04
C
2.0E-03
C
16071-86-6
Direct Brown 95
Not Volatile
Not Volatile
2.0E-05
C
2.0E-04
C
2.0E-03
C
298-04-4
Disulfoton
505-29-3
Dithiane, 1,4-
330-54-1
Diuron
2439-10-3
Dodine
759-94-4
EPTC
115-29-7
Endosulfan
145-73-3
Endothall
72-20-8
Endrin
106-89-8
Epichlorohydrin
1.7E+02
7.0E+00
N
2.1E-01
N
2.1E-01
N
2.1E-01
N
Yes
106-88-7
Epoxybutane, 1,2-
5.7E+02
1.4E+02
N
4.2E+00
N
4.2E+00
N
4.2E+00
N
Yes
111-77-3
Ethanol, 2-(2-methoxyethoxy)-
16672-87-0
Ethephon
563-12-2
Ethion
111-15-9
Ethoxyethanol Acetate, 2-
9.6E+04
4.2E+02
N
1.3E+01
N
1.3E+01
N
1.3E+01
N
Yes
110-80-5
Ethoxyethanol, 2-
2.2E+06
1.4E+03
N
4.2E+01
N
4.2E+01
N
4.2E+01
N
Yes
141-78-6
Ethyl Acetate
2.7E+03
4.9E+02
N
1.5E+01
N
1.5E+01
N
1.5E+01
N
Yes
140-88-5
Ethyl Acrylate
1.2E+02
5.6E+O1
N
1.7E+00
N
1.7E+00
N
1.7E+00
N
Yes
75-00-3
Ethyl Chloride(Chloroethane)
4.6E+03
7.0E+04
N
2.1E+03
N
2.1E+03
N
2.1E+03
N
Yes
60-29-7
Ethyl Ether
97-63-2
Ethyl Methacrylate
2.7E+03
2.1E+03
N
6.3E+01
N
6.3E+01
N
6.3E+01
N
Yes
2104-64-5
Ethyl-p-nitrophenyl Phosphonate
100-41-4
Ethylbenzene
3.5E+01
3.7E+02
C
1.1E+00
C
l.lE+01
C
1.1E+02
C
Yes
109-78-4
Ethylene Cyanohydrin
107-15-3
Ethylene Diamine
107-21-1
Ethylene Glycol
Not Volatile
Not Volatile
8.3E+01
N
8.3E+01
N
8.3E+01
N
Yes
111-76-2
Ethylene Glycol Monobutyl Ether
Not Volatile
Not Volatile
3.3E+02
N
3.3E+02
N
3.3E+02
N
Yes
75-21I
Ethylene Oxide
5.6E-01
1.1E-01
C
3.4E-04
C
3.4E-03
C
3.4E-02
C
Yes
96-45-7
Ethylene Thiourea
Not Volatile
Not Volatile
2.2E-01
C
2.2E+00
C
2.2E+01
C
Page 4 of 11

North Carolina Department of Environmental Quality
Residential Vapor Intrusion Screening Levels
February 2018
(based on November 2017 USEPA Regional Screening Tables)
CAS #
Chemical Name:
Ground Water
Screening Level
(GWSL) ug/L
TCR=1.0E-05
THQ=0.2
Sub -slab and Exterior
Soil Gas Screening
Level (SGSL) ug/mm
TCR=1.0E-05
THQ=0.2
Basis
IASL (A) ug/mm
TCR=1.0E-06
THQ=0.2
Basis
IASL (B)
ng/m
TCR=1.0E-05
THQ=0.2
Basis
z
IASL (C)
ug/m
TCR=1.0E-04
THQ=0.2
Basis
Does Chemical
Have a Non-
Cancer Effect?'
151-56-4
Ethyleneimine
3.0E+00
4.9E-02
C
1.5E-04
C
1.5E-03
C
1.5E-02
C
84-72-0
Ethylphthalyl Ethyl Glycolate
22224-92-6
1 Fenamiphos
39515-41-8
Fenpropathrin
51630-58-1
Fenvalemte
2164-17-2
Fluometuron
16984-48-8
Fluoride
Not Volatile
Not Volatile
2.7E+00
N
2.7E+00
N
2.7E+00
N
Yes
7782414
Fluorine (Soluble Fluoride)
Not Volatile
Not Volatile
2.7E+00
N
2.7E+00
N
2.7E+00
N
Yes
59756-60-4
Fluridone
56425-91-3
Flurimmidol
85509-19-9
Flusilazole
66332-96-5
Flutolanil
69409-94-5
Fluvalinate
133-07-3
Folpet
72178-02-0
Fomesafen
944-22-9
Fowles
50-00-0
Formaldehyde
1.5E+05
6.8E+01
N
2.2E-01
C
2.0E+00
N
2.0E+00
N
Yes
64-18-6
Formic Acid
9.2E+03
2.1E+00
N
6.3E-02
N
6.3E-02
N
6.3E-02
N
Yes
39148-24-8
Fosetyl-AL
Forms
132-64-9
-Dibenzofuran
110-00-9
-Furan
109-99-9
-Tehuhydrofurm
1.4E+05
1.4E+04
N
4.2E+02
N
4.2E+02
N
4.2E+02
N
Yes
6745-8
Fum olidone
98-01-1
Furfural
6.8E+04
3.5E+02
N
1.0E+01
N
1.0E+01
N
1.0E+01
N
Yes
531-82-8
Furium
Not Volatile
Not Volatile
6.5E-03
C
6.5E-02
C
6.5E-01
C
60568-05-0
Furmecyclox
Not Volatile
Not Volatile
3.3E-01
C
3.3E+00
C
3.3E+01
C
77182-82-2
Glufosinate, Ammonium
111-30-8
Glutaraldehyde
Not Volatile
Not Volatile
1.7E-02
N
1.7E-02
N
1.7E-02
N
Yes
765-34-4
Glycidyl
1.0E+04
7.0E+00
N
2.1E-01
N
2.1E-01
N
2.1E-01
N
Yes
1071-83-6
Glyphosate
113-00-8
Guanidine
50-01-1
Guanidine Chloride
506-93-4
Guanidine Nitrate
69806-40-2
Haloxyfop, Methyl
7644-8
Heptachlor
1.8E+00
7.2E-01
C
2.2E-03
C
2.2E-02
C
2.2E-01
C
1024-57-3
Heptachlor Epoxide
1.3E+01
3.6E-01
C
1.1E-03
C
1.1E-02
C
1.1E-01
C
111-71-7
Heptanal,n-
5.7E+01
2.1E+01
N
6.3E-01
N
6.3E-01
N
6.3E-01
N
Yes
142-82-5
Heptane,N-
1.0E+00
2.8E+03
N
8.3E+01
N
8.3E+01
N
8.3E+01
N
Yes
87-82-1
Hexabromobenzene
68631-49-2
Hexabromodiphenyl ether,
2,2',4,4',5,5'- (BDE-153)
118-74-1
Hexachlorobemmne
8.8E-01
2.0E+00
C
6.1E-03
C
6.1E-02
C
6.1E-01
C
87-68-3
Hexachlorobutadiene
3.0E+00
4.3E+01
C
1.3E-01
C
1.3E+00
C
1.3E+01
C
319-84-6
Hexachlorocyclohexane, Alpha-
Not Volatile
Not Volatile
1.6E-03
C
1.6E-02
C
1.6E-01
C
319-85-7
Hexachlorocyclohexane, Beta-
Not Volatile
Not Volatile
5.3E-03
C
5.3E-02
C
5.3E-01
C
58-89-9
Hexachlorocyclohexane, Gamma-
(Lindane)
Not Volatile
Not Volatile
9.1E-03
C
9.1E-02
C
9.1E-01
C
608-73-1
Hexachlorocyclohexane, Technical
Not Volatile
Not Volatile
5.5E-03
C
5.5E-02
C
5.5E-01
C
77474
Hexachlorocyclopentadiene
3.8E-02
1.4E+00
N
4.2E-02
N
4.2E-02
N
4.2E-02
N
Yes
67-72-1
Hexachloroethane
1.6E+01
8.5E+01
C
2.6E-01
C
2.6E+00
C
6.3E+00
N
Yes
70-304
Hexachlorophene
121-82-4
Hexahydro-1,3,5-trinitro-1,3,5-
triazine (RDJ)
822-06-0
Hexamethylene Diisocyanate, 1,6-
1.1E+00
7.0E-02
N
2.1E-03
N
2.1E-03
N
2.1E-03
N
Yes
680-31-9
Hexamethylphosphoramide
110-54-3
Hexane, N-
2.0E+00
4.9E+03
N
1.5E+02
N
1.5E+02
N
1.5E+02
N
Yes
124-04-9
Hexanedioic Acid
591-78-6
Hexamme,2-
1.6E+03
2.1E+02
N
6.3E+00
N
6.3E+00
N
6.3E+00
N
Yes
51235-04-2
Hexazinone
78587-05-0
Hexythiazox
67485-29-4
Hydramethylnon
302-01-2
Hydrazine
2.3E+02
1.9E-01
C
5.7E-04
C
5.7E-03
C
6.3E-03
N
Yes
10034-93-2
Hydrazine Sulfate
Not Volatile
Not Volatile
5.7E-04
C
5.7E-03
C
5.7E-02
C
7647-01-0
Hydrogen Chloride
5.0E-08
1.4E+02
N
4.2E+00
N
4.2E+00
N
4.2E+00
N
Yes
7664-39-3
Hydrogen Fluoride
6.9E+02
9.7E+01
N
2.9E+00
N
2.9E+00
N
2.9E+00
N
Yes
7783-064
Hydrogen Sulfide
1.2E+00
1.4E+01
N
4.2E-01
N
4.2E-01
N
4.2E-01
N
Yes
123-31-9
Hydroquinone
35554-44-0
hnazalil
81335-37-7
hnazaquin
81335-77-5
hnazethapyr
7553-56-2
Iodine
36734-19-7
Iprodione
7439-89-6
Iron
78-83-1
Isobutyl Alcohol
78-59-1
Isophorone
Not Volatile
Not Volatile
4.2E+02
N
4.2E+02
N
4.2E+02
N
Yes
33820-53-0
Isopropalin
67-63-0
Isopropanol
1.3E+05
1.4E+03
N
4.2E+01
N
4.2E+01
N
4.2E+01
N
Yes
1832-54-8
Isopropyl Methyl Phosphonic Acid
82558-50-7
Isoxaben
E173766,
JP-7
1.5E+02
2.1E+03
N
6.3E+01
N
6.3E+01
N
6.3E+01
N
Yes
Page 5 of 11

North Carolina Department of Environmental Quality
Residential Vapor Intrusion Screening Levels
February 2018
(based on November 2017 USEPA Regional Screening Tables)
CAS #
Chemical Name:
Ground Water
Screening Level
(GWSL) ug/L
TCR=1.0E-05
THQ=0.2
Sub -slab and Exterior
Soil Gas Screening
Level (SGSL) ug/m'
TCR=1.0E-05
THQ=0.2
Basis
IASL (A) ug/ms
TCR=1.0E-06
THQ=0.2
Basis
IASL (B)
ng/m
TCR=1.0E-05
THQ=0.2
Basis
z
IASL (C)
ug/m
TCR=1.0E-04
THQ=0.2
Basis
Does Chemical
Have a Non-
Cancer Effect?'
77501-63-4
Lactofen
78-97-7
Lactonitrile
Lead Compounds
7446-27-7
-Lead Phosphate
Not Volatile
Not Volatile
2.3E-01
C
2.3E+00
C
2.3E+01
C
301-04-2
-Lead acetate
Not Volatile
Not Volatile
2.3E-01
C
2.3E+00
C
2.3E+01
C
7439-92-1
-Lead and Compounds
Not Volatile
Not Volatile
1.5E-01
N
1.5E-01
N
1.5E-01
N
Yes
1335-32-6
Lead subacetate
Not Volatile
Not Volatile
2.3E-01
C
2.3E+00
C
2.3E+01
C
78-00-2
-Tetraethyl Lead
541-25-3
Lewisite
330-55-2
Linuron
7439-93-2
Lithium
94-74-6
MCPA
94-81-5
MCPB
93-65-2
MCPP
121-75-5
Malathion
108-31-6
Maleic Anhydride
Not Volatile
Not Volatile
1.5E-01
N
1.5E-01
N
1.5E-01
N
Yes
123-33-1
Maleic Hydrazide
109-77-3
Malononitrile
8018-01-7
Mancozeb
12427-38-2
Maneb
7439-96-5
Manganese (Diet)
Not Volatile
Not Volatile
1.0E-02
N
1.0E-02
N
1.0E-02
N
Yes
7439-96-5
Manganese (Non -diet)
Not Volatile
Not Volatile
1.0E-02
N
1.0E-02
N
1.0E-02
N
Yes
950-10-7
Mephosfolan
24307-26-4
Mepiquat Chloride
149-30-4
Mercaptobenzothiazole, 2-
Mercury Compounds
7487-94-7
-Mercuric Chloride (and other
Mercury salts)
Not Volatile
Not Volatile
6.3E-02
N
6.3E-02
N
6.3E-02
N
Yes
7439-97-6
-Mercury(elemental)
1.8E-01
2.1E+00
N
6.3E-02
N
6.3E-02
N
6.3E-02
N
Yes
22967-92-6
-Methyl Mercury
62-384
-Phenylmercuric Acetate
150-50-5
Merphos
7848-8
Merphos Oxide
57837-19-1
Metalaxyl
126-98-7
Metbacrylonitrile
6.2E+02
2.1E+02
N
6.3E+00
N
6.3E+00
N
6.3E+00
N
Yes
10265-92-6
Methamidophos
67-56-1
Methanol
2.2E+07
1.4E+05
N
4.2E+03
N
4.2E+03
N
4.2E+03
N
Yes
950-37-8
Methidathion
16752-77-5
Methomyl
99-59-2
Metboxy-5-nitromiline, 2-
Not Volatile
Not Volatile
2.0E-01
C
2.0E+00
C
2.0E+01
C
7243-5
Methoxychlor
110-49-6
Metboxyethanol Acetate, 2-
1.6E+04
7.0E+00
N
2.1E-01
N
2.1E-01
N
2.1E-01
N
Yes
109-86-4
Metboxyethanol, 2-
3.1E+05
1.4E+02
N
4.2E+00
N
4.2E+00
N
4.2E+00
N
Yes
79-20-9
Methyl Acetate
96-33-3
Methyl Acrylate
5.1E+02
1.4E+02
N
4.2E+00
N
4.2E+00
N
4.2E+00
N
Yes
78-93-3
Methyl Ethyl Ketone (2-Butanone)
4.5E+05
3.5E+04
N
1.0E+03
N
1.0E+03
N
1.0E+03
N
Yes
60-344
Methyl Hydrazine
3.4E+O1
1.4E-01
N
2.8E-03
C
4.2E-03
N
4.2E-03
N
Yes
108-10-1
Methyl Isobutyl Ketone(4-methyl-2-
pentanone)
1.1E+05
2.1E+04
N
6.3E+02
N
6.3E+02
N
6.3E+02
N
Yes
624-83-9
Methyl lsocyanate
5.5E+00
7.0E+00
N
2.1E-01
N
2.1E-01
N
2.1E-01
N
Yes
80-62-6
Methyl Metbacrylate
1.1E+04
4.9E+03
N
1.5E+02
N
1.5E+02
N
1.5E+02
N
Yes
298-00-0
Methyl Parathion
993-13-5
Methyl Phosphonic Acid
25013-15-4
Methyl Styrene (Mixed Isomers)
7.8E+01
2.8E+02
N
8.3E+00
N
8.3E+00
N
8.3E+00
N
Yes
66-27-3
Methyl methmesulfonate
Not Volatile
Not Volatile
1.0E-01
C
1.0E+00
C
1.0E+01
C
1634-044
Methyl tert-Butyl Ether(MTBE)
4.5E+03
3.6E+03
C
1.1E+01
C
1.1E+02
C
6.3E+02
N
Yes
615-45-2
Methyl-1,4-benzenediamine
dihydrochloride, 2-
108-11-2
Methyl-2-Pentmol, 4-
3.4E+05
2.1E+04
N
6.3E+02
N
6.3E+02
N
6.3E+02
N
Yes
99-55-8
Methyl-S-Nitromiline, 2-
70-25-7
Methyl-N-nitro-N-nitrosoguanidine,
N-
Not Volatile
Not Volatile
1.2E-03
C
1.2E-02
C
1.2E-01
C
636-21-5
Methylaniline Hydrochloride, 2-
Not Volatile
Not Volatile
7.6E-02
C
7.6E-01
C
7.6E+00
C
124-58-3
Methylarsonic acid
74612-12-7
Methylbenzene, 1 4-diamine
monohydrochloride, 2-
615-50-9
Methylbenzene-1,4-diamine sulfate, 2
5649-5
Methylcholanthrene, 3-
Not Volatile
Not Volatile
1.6E-04
C
1.6E-03
C
1.6E-02
C
75-09-2
Methylene Chloride
9.4E+02
4.2E+03
N
1.0E+02
C
1.3E+02
N
1.3E+02
N
Yes
101-14-4
Methylene-bis(2-chloromiline), 4,4'-
Not Volatile
Not Volatile
2.4E-03
C
2.4E-02
C
2.4E-01
C
101-61-1
Methylene-bis(N,N-dimethyl)
Aniline, 4,4'-
Not Volatile
Not Volatile
2.2E-01
C
2.2E+00
C
2.2E+01
C
101-77-9
Methylenebisbemmnamine, 4,4'-
Not Volatile
Not Volatile
6.1E-03
C
6.1E-02
C
6.1E-01
C
Yes
101-68-8
Methylenediphenyl Diisocyanate
Not Volatile
Not Volatile
1.3E-01
N
1.3E-01
N
1.3E-01
N
Yes
98-83-9
Methylstyrene, Alpha-
51218-45-2
Metolachlor
21087-64-9
Metribuzin
74223-64-6
Metsulfuron-methyl
8012-95-1
Mineral oils
Page 6 of 11

North Carolina Department of Environmental Quality
Residential Vapor Intrusion Screening Levels
February 2018
(based on November 2017 USEPA Regional Screening Tables)
CAS #
Chemical Name:
Ground Water
Screening Level
(GWSL) ug/L
TCR=1.0E-05
THQ=0.2
Sub -slab and Exterior
Soil Gas Screening
Level (SGSL) ug/m'
TCR=1.0E-05
THQ=0.2
Basis
IASL (A) ug/ms
TCR=1.0E-06
THQ=0.2
Basis
NASL (B)
ng/m
TCR=1.0E-05
THQ=0.2
Basis
z
IASL (C)
ug/m
TCR=1.0E-04
THQ=0.2
Basis
Does Chemical
Have a Non-
Cancer Effect?'
2385-85-5
Mirex
1.7E-01
1.8E-01
C
5.5E-04
C
5.5E-03
C
5.5E-02
C
2212-67-1
Molinate
7439-98-7
1 Molybdenum
10599-90-3
Monochlommine
100-61-8
Monomethylaniline
88671-89-0
Myclobutanil
74-31-7
N,N'-Dipheny1-1,4-benzenediamine
300-76-5
Naled
64742-95-6
Naphtha, High Flash Aromatic
(HFAN)
1.2E+03
7.0E+02
N
2.1E+01
N
2.1E+01
N
2.1E+01
N
Yes
91-59-8
Naphthylamine, 2-
15299-99-7
Napropamide
373-02-4
Nickel Acetate
Not Volatile
Not Volatile
2.9E-03
N
2.9E-03
N
2.9E-03
N
Yes
3333-67-3
Nickel Carbonate
Not Volatile
Not Volatile
2.9E-03
N
2.9E-03
N
2.9E-03
N
Yes
13463-39-3
Nickel Carbonyl
1.4E-04
9.7E-02
N
2.9E-03
N
2.9E-03
N
2.9E-03
N
Yes
12054-48-7
Nickel Hydroxide
Not Volatile
Not Volatile
2.9E-03
N
2.9E-03
N
2.9E-03
N
Yes
1313-99-1
Nickel Oxide
Not Volatile
Not Volatile
4.2E-03
N
4.2E-03
N
4.2E-03
N
Yes
E715532
Nickel Refinery Dust
Not Volatile
Not Volatile
2.9E-03
N
2.9E-03
N
2.9E-03
N
Yes
7440-02-0
Nickel Soluble Salts
Not Volatile
Not Volatile
1.1E-02
C
1.9E-02
N
1.9E-02
N
Yes
12035-72-2
Nickel Subsulfide
Not Volatile
Not Volatile
2.9E-03
N
2.9E-03
N
2.9E-03
N
Yes
1271-28-9
Nickelocene
Not Volatile
Not Volatile
2.9E-03
N
2.9E-03
N
2.9E-03
N
Yes
14797-55-8
Nitrate
E701177
Nitrate + Nitrite (as N)
14797-65-0
Nitrite
88-744
Nitroaniline, 2-
Not Volatile
Not Volatile
1.0E-02
N
1.0E-02
N
1.0E-02
N
Yes
100-01-6
Nitroaniline, 4-
Not Volatile
Not Volatile
1.3E+00
N
1.3E+00
N
1.3E+00
N
Yes
98-95-3
Nitrobenzene
7.2E+02
2.3E+01
C
7.0E-02
C
7.0E-01
C
1.9E+00
N
Yes
9004-70-0
Nitrocellulose
67-20-9
Nitrofurantoin
59-87-0
Nitrofurazone
Not Volatile
Not Volatile
7.6E-03
C
7.6E-02
C
7.6E-01
C
55-63-0
Nitroglycerin
556-88-7
Nitroguanidine
75-52-5
Nitromethane
8.9E+02
3.5E+01
N
3.2E-01
C
1.0E+00
N
1.0E+00
N
Yes
7946-9
Nitropropane,2-
2.1E+00
3.5E-01
C
1.0E-03
C
1.0E-02
C
1.0E-01
C
Yes
759-73-9
Nitroso-N-ethylurea, N-
Not Volatile
Not Volatile
1.3E-04
C
1.3E-03
C
1.3E-02
C
684-93-5
Nitroso-N-methylurea, N-
Not Volatile
Not Volatile
3.0E-05
C
3.0E-04
C
3.0E-03
C
924-16-3
Nitroso-di-N-butylamine, N-
3.3E+01
5.8E-01
C
1.8E-03
C
1.8E-02
C
1.8E-01
C
621-64-7
Nitroso-di-N-propylamine, N-
Not Volatile
Not Volatile
1.4E-03
C
1.4E-02
C
1.4E-01
C
1116-54-7
Nitrosodiethanolamine, N-
Not Volatile
Not Volatile
3.5E-03
C
3.5E-02
C
3.5E-01
C
55-18-5
Nitrosodiethylamine, N-
Not Volatile
Not Volatile
2.4E-05
C
2.4E-04
C
2.4E-03
C
62-75-9
Nitrosodimethylamine, N-
9.7E+00
2.4E-02
C
7.2E-05
C
7.2E-04
C
7.2E-03
C
Yes
86-30-6
Nitrosodiphenylamine, N-
Not Volatile
Not Volatile
1.1E+00
C
1.1E+01
C
1.1E+02
C
10595-95-6
Nitrosomethylethylamine, N-
7.6E+O1
1.5E-01
C
4.5E-04
C
4.5E-03
C
4.5E-02
C
59-89-2
Nitrosomorpholine jN-j
Not Volatile
Not Volatile
1.5E-03
C
1.5E-02
C
1.5E-01
C
100-75-4
Nitrosopiperidine jN-)
Not Volatile
Not Volatile
1.0E-03
C
1.0E-02
C
1.0E-01
C
930-55-2
Nitrosopyrrolidine, N-
Not Volatile
Not Volatile
4.6E-03
C
4.6E-02
C
4.6E-01
C
99-08-1
Nitrotoluene, m-
88-72-2
Nitrotoluene,o-
99-99-0
Nitrotoluene, p-
111-84-2
Nonane, n-
3.0E-02
1.4E+02
N
4.2E+00
N
4.2E+00
N
4.2E+00
N
Yes
27314-13-2
Norfiurazon
32536-52-0
Octabromodiphenyl Ether
269141-0
Octahydro-1,3,5,7-tetranitro-1,3,5,7-
tetrazocine (BA4X)
152-16-9
Octamethylpyrophosphoramide
19044-88-3
Oryzalin
19666-30-9
Oxadiazon
23135-22-0
Oxamyl
42874-03-3
Oxyfiuorfen
76738-62-0
Paclobutrazol
191042-5
Paraquat Dichloride
56-38-2
Parathion
1114-71-2
Pebulate
40487-42-1
Pendimethalin
32534-81-9
Pentabromodiphenyl Ether
60348-60-9
Pentabromodiphenyl ether, 2,2',4,4',5-
(BDE-99)
608-93-5
Pentachlorobenzene
76-01-7
Pentachloroethane
82-68-8
Pentachloronitrobenzene
87-86-5
Pentachlorophenol
Not Volatile
Not Volatile
5.5E-01
C
5.5E+00
C
5.5E+01
C
78-11-5
Pentaerythritol tetranitrate (PETN )
109-66-0
Pentane, n-
4.1E+00
7.0E+03
N
2.1E+02
N
2.1E+02
N
2.1E+02
N
Yes
Perchlorates
7790-98-9
-Ammonium Perchlorate
7791-03-9
-Lithium Perchlorate
14797-73-0
-Perchlorate and Perchlorate Salts
7778-74-7
-Potassium Perchlorate
7601-89-0
-Sodium Perchlorate
375-73-5
Perfiuorobutane sulfonic acid (PFBS)
Page 7 of 11

North Carolina Department of Environmental Quality
Residential Vapor Intrusion Screening Levels
February 2018
(based on November 2017 USEPA Regional Screening Tables)
CAS #
Chemical Name:
Ground Water
Screening Level
(GWSL) ug/L
TCR=1.0E-05
THQ=0.2
Sub -slab and Exterior
Soil Gas Screening
Level (SGSL) ug/ms
TCR=1.0E-05
THQ=0.2
Basis
IASL (A) ug/ms
TCR=1.0E-06
THQ=0.2
Basis
IASL (B)
ng/m
TCR=1.0E-05
THQ=0.2
Basis
z
IASL (C)
ug/m
TCR=1.0E-04
THQ=0.2
Basis
Does Chemical
Have a Non-
Cancer Effect?'
45187-15-3
Perfluorobutanesulfonate
52645-53-1
Permethrin
6244-2
Phenacetin
Not Volatile
Not Volatile
4.5E+00
C
4.5E+01
C
4.5E+02
C
13684-63-4
Phenmedipham
108-95-2
Phenol
Not Volatile
Not Volatile
4.2E+01
N
4.2E+01
N
4.2E+01
N
Yes
114-26-1
Phenol, 2-(I-methylethoxy)-,
methylcarbamate
92-84-2
Phenothi-ine
103-72-0
Phenyl lsothiocyanate
108-45-2
Phenylenediamine, m-
95-54-5
Phenylenediamine, o-
106-50-3
Phenylenediamine,p-
90-43-7
Phenylphenol,2-
298-02-2
Phorate
7544-5
Phosgene
9.2E-02
2.1E+00
N
6.3E-02
N
6.3E-02
N
6.3E-02
N
Yes
732-11-6
Phosmet
Phosphates, Inorganic
13776-88-0
-Aluminum metaphosphate
68333-79-9
-Ammonium polyphosphate
7790-76-3
-Calcium pyrophosphate
7783-28-0
-Diammonium phosphate
7757-93-9
-Dicalcium phosphate
7782-754
-Dimagnesium phosphate
7758-114
-Dipotassium phosphate
7558-794
-Disodium phosphate
13530-50-2
-Monoaluminum phosphate
7722-76-1
-Monoammonium phosphate
7758-23-8
-Monocalcium phosphate
7757-86-0
-Monomagnesium phosphate
7778-77-0
-Monopotassium phosphate
7558-80-7
-Monosodium phosphate
8017-16-1
-Polyphosphoric acid
13845-36-8
-Potassium tripolyphosphate
7758-16-9
-Sodium acid pyrophosphate
7785 88 8
-Sodium aluminum phosphate
(acidic)
10279-59-1
-Sodium aluminum phosphate
(anhydrous)
10305-76-7
-Sodium aluminum phosphate
(tetrahydrate)
10124-56-8
-Sodium hexametaphosphate
68915-31-1
-Sodium polyphosphate
7785-844
-Sodium trimetaphosphate
7758-294
-Sodium tripolyphosphate
7320-34-5
-Tetrapotassium phosphate
7722-88-5
-Tetmsodium pyrophosphate
15136-87-5
-Trialuminum sodium tetra
decahydrogenoctaorthophosphate
(dihydrate)
7758-874
-Tricalcium phosphate
7757-87-1
-Trimagnesium phosphate
7778-53-2
-Tripotassium phosphate
7601-54-9
-Trisodium phosphate
7803-51-2
Phosphine
6.3E-02
2.1E+00
N
6.3E-02
N
6.3E-02
N
6.3E-02
N
Yes
7664-38-2
Phosphoric Acid
Not Volatile
Not Volatile
2.1E+00
N
2.1E+00
N
2.1E+00
N
Yes
7723-14-0
Phosphorus, White
Phthalates
117-81-7
-Bis(2-ethylhexyl)phthalate
Not Volatile
Not Volatile
1.2E+00
C
1.2E+01
C
1.2E+02
C
85-68-7
-Butyl Benzyl Phthalate
85-70-1
-Butylphthalyl Butylglycolate
84-74-2
-Dibutyl Phthalate
84-66-2
-Diethyl Phthalate
120-61-6
-Dimethylterephthalate
117-84-0
-Octyl Phthalate, di-N-
100-21-0
-Phthalic Acid, P-
8544-9
-Phthalic Anhydride
Not Volatile
Not Volatile
4.2E+00
N
4.2E+00
N
4.2E+00
N
Yes
1918-02-1
Picloram
96-91-3
Picmmic Acid (2-Amino-4,6-
dinitrophenol)
88-89-1
Picric Acid(2,4,6-Trinitrophenol)
29232-93-7
Pirimiphos, Methyl
59536-65-1
Polybrominated Biphenyls
Not Volatile
Not Volatile
3.3E-04
C
3.3E-03
C
3.3E-02
C
Polychlorinated Biphenyls (PCBs)
12674-11-2
-Aroclor 1016
1.7E+02
4.7E+01
C
1.4E-01
C
1.4E+00
C
1.4E+O1
C
11104-28-2
-Aroclor 1221
5.3E+00
1.6E+00
C
4.9E-03
C
4.9E-02
C
4.9E-01
C
11141-16-5
-Aroclor 1232
1.6E+00
1.6E+00
C
4.9E-03
C
4.9E-02
C
4.9E-01
C
53469-21-9
-Aroclor 1242
3.5E+00
1.6E+00
C
4.9E-03
C
4.9E-02
C
4.9E-01
C
12672-29-6
-Aroclor 1248
2.7E+00
1.6E+00
C
4.9E-03
C
4.9E-02
C
4.9E-01
C
11097-69-1
-Aroclor 1254
4.3E+00
1.6E+00
C
4.9E-03
C
4.9E-02
C
4.9E-01
C
11096-82-5
-Aroclor 1260
3.6E+00
1.6E+00
C
4.9E-03
C
4.9E-02
C
4.9E-01
C
11126-42-4
-Aroclor 5460
Page 8 0£ 11

North Carolina Department of Environmental Quality
Residential Vapor Intrusion Screening Levels
February 2018
(based on November 2017 USEPA Regional Screening Tables)
CAS #
Chemical Name:
Ground Water
Screening Level
(GWSL) ug/L
TCR=1.0E-05
THQ=0.2
Sub -slab and Exterior
Soil Gas Screening
Level (SGSL) ug/ms
TCR=1.0E-05
THQ=0.2
Basis
IASL (A) ug/ms
TCR=1.0E-06
THQ=0.2
Basis
IASL (B)
ng/m
TCR=1.0E-05
THQ=0.2
Basis
z
IASL (C)
ug/m
TCR=1.0E-04
THQ=0.2
Basis
Does Chemical
Have a Non-
Cancer Effect?'
39635-31-9
-Heptuhlorobiphenyl, 2,3,3',4,4',5,5'-
(PCB 189)
1.2E+01
8.5E-01
C
2.6E-03
C
2.6E-02
C
2.6E-01
C
Yes
52663-72-6
-Hexachlorobiphenyl,2,3',4,4',5,5'-
(PCB 167)
9.1E+00
8.5E-01
C
2.6E-03
C
2.6E-02
C
2.6E-01
C
Yes
69782-90-7
-Hexachlorobiphenyl, 2,3,3',4,4',5'-
(PCB 157)
3.9E+00
8.5E-01
C
2.6E-03
C
2.6E-02
C
2.6E-01
C
Yes
38380-08-4
-Hexachlorobiphenyl, 2,3,3',4,4',5-
(PCB 156)
4.4E+00
8.5E-01
C
2.6E-03
C
2.6E-02
C
2.6E-01
C
Yes
32774-16-6
-Hexachlorobiphenyl, 3,3',4,4',5,5'-
(PCB 169)
9.1E-03
8.5E-04
C
2.6E-06
C
2.6E-05
C
2.6E-04
C
Yes
65510-44-3
-Pentachlorobiphenyl, 2',3,4,4',5-
(PCB 123)
3.3E+00
8.5E-01
C
2.6E-03
C
2.6E-02
C
2.6E-01
C
Yes
31508-00-6
-Pentachlorobiphenyl, 2,3',4,4',5-
(PCB 118)
2.2E+00
8.5E-01
C
2.6E-03
C
2.6E-02
C
2.6E-01
C
Yes
32598-14-4
-Pentachlorobiphenyl, 2,3,3',4,4'-
(PCB 105)
2.2E+00
8.5E-01
C
2.6E-03
C
2.6E-02
C
2.6E-01
C
Yes
74472-37-0
-Pentachlorobiphenyl, 2,3,4,4',5-
(PCB 114)
6.8E+00
8.5E-01
C
2.6E-03
C
2.6E-02
C
2.6E-01
C
Yes
57465-28-8
-Pentachlorobiphenyl, 3,3',4,4',5-
(PCB 126)
9.5E-04
2.5E-04
C
7.4E-07
C
7.4E-06
C
7.4E-05
C
Yes
1336-36-3
-Polychlorinated Biphenyls (high
2.9E+00
1.6E+00
C
4.9E-03
C
4.9E-02
C
4.9E-01
C
1336-36-3
-Polychlorinated ) Biphenyls (low
1.7E+01
9.4E+00
C
2.8E-02
C
2.8E-01
C
2.8E+00
C
1336-36-3
-Polychlorinated Biphenyls (lowest
risk)
8.3E+01
4.7E+01
C
1.4E-01
C
1.4E+00
C
1.4E+O1
C
32598-13-3
-Tetruhlorobiphenyl, 3,3',4,4'- (PCB
77)
Not Volatile
Not Volatile
7.4E-04
C
7.4E-03
C
7.4E-02
C
Yes
70362-50-4
-Tetruhlorobiph8e1) 1, 3,4,4',5- (PCB
2.8E-01
8.5E-02
C
2.6E-04
C
2.6E-03
C
2.6E-02
C
Yes
9016-87-9
Polymeric Methylene Diphenyl
Diisocyanate (PMDI)
Not Volatile
Not Volatile
1.3E-01
N
1.3E-01
N
1.3E-01
N
Yes
Polynuclear Aromatic Hydrocarbons
(PAHs)
83-32-9
-Acenaphthene
120-12-7
-Anthracene
56-55-3
-Benzra)anthracene
3.4E+02
5.6E+00
C
1.7E-02
C
1.7E-01
C
1.7E+00
C
205-82-3
-Benzo(i)flumanthene
Not Volatile
Not Volatile
2.6E-02
C
2.6E-01
C
2.6E+00
C
50-32-8
-Benzora)pyrene
Not Volatile
Not Volatile
4.2E-04
N
4.2E-04
N
4.2E-04
N
Yes
205-99-2
-Benzorb)fluoranthene
Not Volatile
Not Volatile
1.7E-02
C
1.7E-01
C
1.7E+00
C
207-08-9
-Benzork)fluoranthene
Not Volatile
Not Volatile
1.7E-01
C
1.7E+00
C
1.7E+01
C
91-58-7
-Chloronaphthalene, Beta-
218-01-9
-Chrysene
Not Volatile
Not Volatile
1.7E+00
C
1.7E+01
C
1.7E+02
C
53-70-3
-Dibenzra,h)anthmcene
Not Volatile
Not Volatile
1.7E-03
C
1.7E-02
C
1.7E-01
C
192-65-4
-Dibenzo(a,e)pyrene
Not Volatile
Not Volatile
2.6E-03
C
2.6E-02
C
2.6E-01
C
57-97-6
-Dimethylbenz(a)anthmcene, 7,12-
Not Volatile
Not Volatile
1.4E-05
C
1.4E-04
C
1.4E-03
C
206-44-0
-Fluoranthene
86-73-7
-Flumene
193-39-5
-Indenor1,2,3-cd)pyrene
Not Volatile
Not Volatile
1.7E-02
C
1.7E-01
C
1.7E+00
C
90-12-0
-Methylnaphthalene, 1-
91-57-6
-Methylnaphthalene, 2-
91-20-3
-Naphthalene
3.5E+01
2.1E+01
N
8.3E-02
C
6.3E-01
N
6.3E-01
N
Yes
57835-92-4
-Nitropyrene, 4-
Not Volatile
Not Volatile
2.6E-02
C
2.6E-01
C
2.6E+00
C
129-00-0
-Pyrene
29420-49-3
Potassium Perflumobutane Sulfonate
67747-09-5
Prochloraz
26399-36-0
Profluralin
1610-18-0
Prometon
7287-19-6
Prometryn
1918-16-7
Propachlor
709-98-8
Propanil
2312-35-8
Prolawgite
107-19-7
Propargyl Alcohol
139-40-2
Propazine
122-42-9
Propham
60207-90-1
Propiconazole
123-38-6
Propionaldehyde
5.6E+02
5.6E+01
N
1.7E+00
N
1.7E+00
N
1.7E+00
N
Yes
103-65-1
Propyl benzene
4.9E+02
7.0E+03
N
2.1E+02
N
2.1E+02
N
2.1E+02
N
Yes
115-07-1
Propylene
7.8E+01
2.1E+04
N
6.3E+02
N
6.3E+02
N
6.3E+02
N
Yes
57-55-6
Propylene Glycol
6423434
Propylene Glycol Dinitrate
Not Volatile
Not Volatile
5.6E-02
N
5.6E-02
N
5.6E-02
N
Yes
107-98-2
Propylene Glycol Monomethyl Ether
1.1E+07
1.4E+04
N
4.2E+02
N
4.2E+02
N
4.2E+02
N
Yes
75-56-9
Propylene Oxide
2.2E+03
2.1E+02
N
7.6E-01
C
6.3E+00
N
6.3E+00
N
Yes
23950-58-5
Propyzamide
110-86-1
Pyridine
13593-03-8
Quinalphos
91-22-5
Quinoline
76578-14-8
Quizalofop-ethyl
E715557
Refractory Ceramic Fibers
Not Volatile
Not Volatile
6.3E+00
N
6.3E+00
N
6.3E+00
N
Yes
Page of 11

North Carolina Department of Environmental Quality
Residential Vapor Intrusion Screening Levels
February 2018
(based on November 2017 USEPA Regional Screening Tables)
CAS #
Chemical Name:
Ground Water
Screening Level
(GWSL) ug/L
TCR=1.0E-05
THQ=0.2
Sub -slab and Exterior
Soil Gas Screening
Level (SGSL) ug/ms
TCR=1.0E-05
THQ=0.2
Basis
IASL (A) ug/ms
TCR=1.0E-06
THQ=0.2
Basis
IASL (B)
ng/m
TCR=1.0E-05
THQ=0.2
Basis
z
IASL (C)
ug/m
TCR=1.0E-04
THQ=0.2
Basis
Does Chemical
Have a Non-
Cancer Effect?'
10453-86-8
Resmethrin
299-84-3
Runnel
83-794
Rotenone
94-59-7
Safrole
Not Volatile
Not Volatile
1.6E-02
C
1.6E-01
C
1.6E+00
C
7783-00-8
Seleniou Acid
778249-2
Selenium
Not Volatile
Not Volatile
4.2E+00
N
4.2E+00
N
4.2E+00
N
Yes
7446-34-6
Selenium Sulfide
Not Volatile
Not Volatile
4.2E+00
N
4.2E+00
N
4.2E+00
N
Yes
74051-80-2
Sethoxydim
7631-86-9
Silica (crystalline, respirable)
Not Volatile
Not Volatile
6.3E-01
N
6.3E-01
N
6.3E-01
N
Yes
7440-224
Silver
122-34-9
Simazine
62476-59-9
Sodium Acifluorfen
26628-22-8
Sodium Azide
148-18-5
Sodium Diethyldithiocarbamate
7681494
Sodium Fluoride
Not Volatile
Not Volatile
2.7E+00
N
2.7E+00
N
2.7E+00
N
Yes
62-74-8
Sodium Fluoroacetate
13718-26-8
Sodium Metavanadate
13472-45-2
1 Sodium Tungstate
10213-10-2
Sodium Tungstate Dihydmte
961-11-5
Stirofos (Tetrachlorovinphos)
7440-24-6
Strontium, Stable
57-24-9
Strychnine
100-42-5
Styrene
1.9E+03
7.0E+03
N
2.1E+02
N
2.1E+02
N
2.1E+02
N
Yes
NA
Styrene-Acrylonitrile (SAN) Trimer
126-33-0
Sulfolane
Not Volatile
Not Volatile
4.2E-01
N
4.2E-01
N
4.2E-01
N
Yes
80-07-9
Sulfonylbis(4-chlorobenzene), 1,1'-
7446-11-9
Sulfur Trioxide
7.0E+00
N
2.1E-01
N
2.1E-01
N
2.1E-01
N
Yes
7664-93-9
Sulfuric Acid
Not Volatile
Not Volatile
2.1E-01
N
2.1E-01
N
2.1E-01
N
Yes
140-57-8
Sulfurous acid, 2-chloroethyl 2-[4-
(1,1-dimethylethyl)phenoxy]-1-
methylethyl ester
Not Volatile
Not Volatile
4.0E-01
C
4.0E+00
C
4.0E+01
C
21564-17-0
TCMTB
34014-18-1
Tebuthiumn
3383-96-8
Temephos
5902-51-2
Terbacil
13071-79-9
Terbufos
886-50-0
Terbutryn
543643-1
Tetmbromodiphenyl ether, 2,2',4,4'-
(BDE47)
95-94-3
Tetrachlorobenzene, 1,2,4,5-
630-20-6
Tetrachloroethane, 1,1,1,2-
3.7E+01
1.3E+02
C
3.8E-01
C
3.8E+00
C
3.8E+01
C
79-34-5
Tetrachloroethane, 1,1,2,2-
3.2E+01
1.6E+01
C
4.8E-02
C
4.8E-01
C
4.8E+00
C
127-18-4
Tetrachloroethylene
1.2E+01
2.8E+02
N
8.3E+00
N
8.3E+00
N
8.3E+00
N
Yes
58-90-2
Tetrachlorophenol, 2,3,4,6-
5216-25-1
Tetrachlorotoluene, p- alpha, alpha,
alpha-
3689-24-5
Tetraethyl Dithiopyrophosphate
811-97-2
Tetrafluoroethane, 1,1,1,2-
8.2E+03
5.6E+05
N
1.7E+04
N
1.7E+04
N
1.7E+04
N
Yes
479-45-8
Tetryl
(Trinitmphenylmethylnitramine)
1314-32-5
Thallic Oxide
10102-45-1
Thallium (I) Nitrate
7440-28-0
Thallium (Soluble Salts)
563-68-8
Thallium Acetate
6533-73-9
Thallium Carbonate
7791-12-0
Thallium Chloride
12039-52-0
Thallium Selenite
7446-18-6
Thallium Sulfate
79277-27-3
Thifensulfuron-methyl
28249-77-6
Thiobencarb
111-48-8
Thiodiglycol
39196-18-4
Thiofanox
23564-05-8
Thiophanate, Methyl
137-26-8
Thiram
7440-31-5
Tin
755045-0
Titanium Tetrachloride
7.0E-01
N
2.1E-02
N
2.1E-02
N
2.1E-02
N
Yes
108-88-3
Toluene
3.8E+03
3.5E+04
N
1.0E+03
N
1.0E+03
N
1.0E+03
N
Yes
584-84-9
Toluene-2,4-diisocyanate
3.7E+00
5.6E-02
N
1.7E-03
N
1.7E-03
N
1.7E-03
N
Yes
95-70-5
Toluene-2,5-diamine
91-08-7
Toluene-2,6-diisocyanate
3.7E+00
5.6E-02
N
1.7E-03
N
1.7E-03
N
1.7E-03
N
Yes
99-94-5
Toluic Acid, p-
95-534
Toluidine, o- (Methylaniline, 2-)
Not Volatile
Not Volatile
5.5E-02
C
5.5E-01
C
5.5E+00
C
106-49-0
Toluidine,p-
E1790670
Total Petroleum Hydrocarbons
(Aliphatic High)
E1790666
Total Petroleum Hydrocarbons
(Aliphatic Low)
1.7E+00
4.2E+03
N
1.3E+02
N
1.3E+02
N
1.3E+02
N
Yes
E1790668
Total Petroleum Hydrocarbons
(Aliphatic Medium)
1.5E-01
7.0E+02
N
2.1E+01
N
2.1E+01
N
2.1E+01
N
Yes
E1790676
Total Petroleum Hydrocarbons
(Aromatic High)
Page 10 oft I

North Carolina Department of Environmental Quality
Residential Vapor Intrusion Screening Levels
February 2018
(based on November 2017 USEPA Regional Screening Tables)
CAS #
Chemical Name:
Ground Water
Screening Level
(GWSL) ug/L
TCR=1.0E-05
THQ=0.2
Sub -slab and Exterior
Soil Gas Screening
Level (SGSL) ug/m'
TCR=1.0E-05
THQ=0.2
Basis
IASL (A) ug/ms
TCR=1.0E-06
THQ=0.2
Basis
IASL (B)
ng/m
TCR=1.0E-05
THQ=0.2
Basis
z
IASL (C)
ug/m
TCR=1.0E-04
THQ=0.2
Basis
Does Chemical
Have a Non-
Cancer Effect?'
E1790672
Total Petroleum Hydrocarbons
(Aromatic Low)
2.8E+01
2.1E+02
N
6.3E+00
N
6.3E+00
N
6.3E+00
N
Yes
E1790674
Total Petroleum Hydrocarbons
(Aromatic Medium)
3.2E+01
2.1E+01
N
6.3E-01
N
6.3E-01
N
6.3E-01
N
Yes
8001-35-2
Toxaphene
Not Volatile
Not Volatile
8.8E-03
C
8.8E-02
C
8.8E-01
C
66841-25-6
Tmlomethrin
688-73-3
Tri-n-butyltin
102-76-1
Triacetin
43121-43-3
Triadimefon
2303-17-5
Triallate
82097-50-5
Triasulfuron
101200-48-0
Tribenuron-methyl
615-54-3
Tribromobenzene, 1,2,4-
118-79-6
Tribromophenol, 2,4,6-
126-73-8
Tributyl Phosphate
E1790678
Tributyltin Compounds
56-35-9
Tributyltin Oxide
76-13-1
Trichloro-1,2,2-trifluoroethme, 1,1,2-
4.8E+01
3.5E+04
N
1.0E+03
N
1.0E+03
N
1.0E+03
N
Yes
76-03-9
Trichloroacetic Acid
33663-50-2
Trichloroaniline HCI, 2,4,6-
634-93-5
Trichloroaniline, 2,4,6-
87-61-6
Trichlorobemmne, 1,2,3-
120-82-1
Trichlorobenzene, 1,2,4-
7.2E+00
1.4E+01
N
4.2E-01
N
4.2E-01
N
4.2E-01
N
Yes
71-55-6
Trichloroethane, 1,1,1-
1.5E+03
3.5E+04
N
1.0E+03
N
1.0E+03
N
1.0E+03
N
Yes
79-00-5
Trichloroethane, 1,1,2-
1.2E+00
1.4E+00
N
4.2E-02
N
4.2E-02
N
4.2E-02
N
Yes
79-01-6
Trichloroethylene
1.0E+00
1.4E+01
N
4.2E-01
N
4.2E-01
N
4.2E-01
N
Yes
75-694
Trichlorofluoromethane
95-954
Trichlorophenol, 2,4,5-
88-06-2
Trichlorophenol, 2,4,6-
Not Volatile
Not Volatile
9.1E-01
C
9.1E+00
C
9.1E+01
C
93-76-5
Trichlorophenoxyacetic Acid, 2,4,5-
93-72-1
Trichlorophenoxypropionic acid, -
2,4,5
598-77-6
Trichloropropane, 1,1,2-
96-184
Trichloropropane, 1,2,3-
4.5E+00
2.1E+00
N
6.3E-02
N
6.3E-02
N
6.3E-02
N
Yes
96-19-5
Trichloropropee, 1,2,3-
8.7E-02
2.1E+00
N
6.3E-02
N
6.3E-02
N
6.3E-02
N
Yes
1330-78-5
Tricresyl Phosphate (TCP)
58138-08-2
Tridiphane
121-44-8
Triethylamine
2.4E+02
4.9E+01
N
1.5E+00
N
1.5E+00
N
1.5E+00
N
Yes
112-27-6
Triethylene Glycol
420-46-2
Trifluoroethane, 1,1,1-
1.3E+02
1.4E+05
N
4.2E+03
N
4.2E+03
N
4.2E+03
N
Yes
1582-09-8
Triflumlin
512-56-1
Trimethyl Phosphate
526-73-8
Trimethylbenzene, 1,2,3-
7.0E+01
4.2E+02
N
1.3E+01
N
1.3E+01
N
1.3E+01
N
Yes
95-63-6
Trimethylbenzene, 1,2,4-
5.0E+01
4.2E+02
N
1.3E+01
N
1.3E+01
N
1.3E+01
N
Yes
108-67-8
Trimethylbenzene, 1,3,5-
3.5E+01
4.2E+02
N
1.3E+01
N
1.3E+01
N
1.3E+01
N
Yes
25167-70-8
Trimethylpentene, 2,4,4-
99-354
Trinitrobenzene, 1,3,5-
118-96-7
Trinitrotoluene, 2,4,6-
791-28-6
Triphenylphosphine Oxide
13674-87-8
Tris(1,3-Dichloro-2-propyl)
Phosphate
13674-84-5
Tris(1-chloro-2-propyl)phosphate
126-72-7
Tris(2,3-dibromopropyl)phosphate
4.8E+01
1.4E+00
C
4.3E-03
C
4.3E-02
C
4.3E-01
C
115-96-8
Tris(2-chloroethyl)phosphate
7842-2
Tris(2-ethylhexyl)phosphate
7440-33-7
Tungsten
E715565
Uranium (Soluble Salts)
Not Volatile
Not Volatile
8.3E-03
N
8.3E-03
N
8.3E-03
N
Yes
51-79-6
Urethane
Not Volatile
Not Volatile
3.5E-03
C
3.5E-02
C
3.5E-01
C
1314-62-1
Vanadium Pentoxide
Not Volatile
Not Volatile
3.4E-04
C
1.5E-03
N
1.5E-03
N
Yes
7440-62-2
Vanadium and Compounds
Not Volatile
Not Volatile
2.1E-02
N
2.1E-02
N
2.1E-02
N
Yes
1929-77-7
Vemolate
50471-44-8
Vinclozolin
108-05-4
Vinyl Acetate
2.0E+03
1.4E+03
N
4.2E+01
N
4.2E+01
N
4.2E+01
N
Yes
593-60-2
Vinyl Bromide
1.2E+00
2.1E+01
N
8.8E-02
C
6.3E-01
N
6.3E-01
N
Yes
75-014
Vinyl Chloride
1.5E+00
5.6E+O1
C
1.7E-01
C
1.7E+00
C
1.7E+01
C
Yes
81-81-2
Warfarin
106-42-3
Xylene, P-
7.4E+01
7.0E+02
N
2.1E+01
N
2.1E+01
N
2.1E+01
N
Yes
108-38-3
Xylene,m-
7.1E+01
7.0E+02
N
2.1E+01
N
2.1E+01
N
2.1E+01
N
Yes
9547-6
Xylene,o-
9.8E+O1
7.0E+02
N
2.1E+01
N
2.1E+01
N
2.1E+01
N
Yes
1330-20-7
Xylenes
7.7E+01
7.0E+02
N
2.1E+01
N
2.1E+01
N
2.1E+01
N
Yes
1314-84-7
Zinc Phosphide
7440-66-6
Zinc and Compounds
12122-67-7
Zineb
7440-67-7
Zirconium
1) TCR = Target Cancer Risk; THQ=Target Hazard Quotient; C= Carcinogenic; N = Non -Carcinogenic
2) Indoor A r/Crawlspace Screening Levels at target risk 1.0E-04 (IASL C) to be used if only one carcinogen is present.
3) If more than five compounds with non -cancer effects are present risk should be evaluated using NCDEQ Risk Calculator.
Page 11 oft I

APPENDIX D
LABORATORY REPORT AND CHAIN OF CUSTODY FORM

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
March 29, 2019
Robert Hill
RDH Environmental Consulting
4012 Ridgebrook Bluffs Drive
Raleigh, NC 27603
Project Location: Raleigh, NC
Client Job Number:
Project Number: 1907.00
Laboratory Work Order Number: 19C1255
Enclosed are results of analyses for samples received by the laboratory on March 20, 2019. 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 33

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
RDH Environmental Consulting REPORT DATE: 3/29/2019
4012 Ridgebrook Bluffs Drive
Raleigh, NC 27603 PURCHASE ORDER NUMBER:
ATTN: Robert Hill
PROJECT NUMBER: 1907.00
ANALYTICAL SUMMARY
WORK ORDER NUMBER: 19C1255
The results of analyses performed on the following samples submitted to the CON -TEST Analytical Laboratory are found in this report.
PROJECT LOCATION: Raleigh, NC
FIELD SAMPLE # LAB ID: MATRIX SAMPLE DESCRIPTION TEST SUB LAB
SG-1
19C1255-01
Sub Slab
EPATO-15
SG-2
19C1255-02
Sub Slab
EPATO-15
SG-2 DUP
19C1255-03
Sub Slab
EPATO-15
SG-3
19C1255-04
Sub Slab
EPA TO-15
SG-4
19C1255-05
Sub Slab
EPATO-15
SG-5
19C1255-06
Sub Slab
EPATO-15
Page 2 of 33

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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:
1,1,1-Trichloroethane, 1,2-Dichloropropane, 2-Hexanone (MBK), Heptane
19C1255-01[SG-1], 19C1255-02[SG-2], 19C1255-03[SG-2 DUP], 19C1255-04[SG-3], 19C1255-05[SG-4], 19C1255-06[SG-5], B226969-BS1
Continuing calibration verification (CCV) did not meet method specifications and was biased on the low side for this compound.
Analyte & Samples(s) Qualified:
1,2-Dichloropropane, 2-Hexanone (MBK), Heptane, Vinyl Acetate
19C1255-01[SG-1], 19C1255-02[SG-2], 19C1255-03[SG-2 DUP], 19C1255-04[SG-3], 19C1255-05[SG-4], 19C1255-06[SG-5], 5034081-CCVI
Initial calibration verification (ICV) did not meet method specifications and was biased on the high side. Data validation is not affected since
sample result was "not detected" for this compound.
Analyte & Samples(s) Qualified:
Hexachlorobutadiene
B226969-BS1, 5034081-CCVI
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.
Lisa A. Worthington
Project Manager
Page 3 of 33

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ANALYTICAL LABORATORY
Project Location: Raleigh, NC
Date Received: 3/20/2019
Field Sample #: SG-1
Sample ID: 19C1255-01
Sample Matrix: Sub Slab
Sampled: 3/19/2019 18:18
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Sample Description/Location: Work Order: 19C1255
Sub Description/Location: Initial Vacuum(in Hg): -30
Canister ID: 2383 Final Vacuum(in Hg): -5
Canister Size: 3 liter Receipt Vacuum(in Hg): -2.8
Flow Controller ID: 4038 Flow Controller Type: Fixed -Orifice
Sample Type: 15 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
6.5
8.0
2.8
J
15
19
6.6
4
3/28/19 15:56
BRF
Benzene
ND
0.20
0.082
ND
0.64
0.26
4
3/28/19 15:56
BRF
Benzyl chloride
ND
0.20
0.044
ND
1.0
0.23
4
3/28/19 15:56
BRF
Bromodichloromethane
ND
0.20
0.074
ND
1.3
0.49
4
3/28/19 15:56
BRF
Bromoform
ND
0.20
0.090
ND
2.1
0.93
4
3/28/19 15:56
BRF
Bromomethane
ND
0.20
0.14
ND
0.78
0.53
4
3/28/19 15:56
BRF
1,3-Butadiene
ND
0.20
0.13
ND
0.44
0.28
4
3/28/19 15:56
BRF
2-Butanone (MEK)
0.87
8.0
0.31
J
2.6
24
0.92
4
3/28/19 15:56
BRF
Carbon Disulfide
ND
2.0
0.14
ND
6.2
0.43
4
3/28/19 15:56
BRF
Carbon Tetrachloride
ND
0.20
0.065
ND
1.3
0.41
4
3/28/19 15:56
BRF
Chlorobenzene
ND
0.20
0.098
ND
0.92
0.45
4
3/28/19 15:56
BRF
Chloroethane
ND
0.20
0.12
ND
0.53
0.32
4
3/28/19 15:56
BRF
Chloroform
ND
0.20
0.074
ND
0.98
0.36
4
3/28/19 15:56
BRF
Chloromethane
ND
0.40
0.14
ND
0.83
0.28
4
3/28/19 15:56
BRF
Cyclohexane
ND
0.20
0.14
ND
0.69
0.49
4
3/28/19 15:56
BRF
Dibromochloromethane
ND
0.20
0.066
ND
1.7
0.57
4
3/28/19 15:56
BRF
1,2-Dibromoethane (EDB)
ND
0.20
0.078
ND
1.5
0.60
4
3/28/19 15:56
BRF
1,2-Dichlorobenzene
ND
0.20
0.096
ND
1.2
0.58
4
3/28/19 15:56
BRF
1,3-Dichlorobenzene
0.16
0.20
0.10
J
0.96
1.2
0.62
4
3/28/19 15:56
BRF
1,4-Dichlorobenzene
ND
0.20
0.12
ND
1.2
0.73
4
3/28/19 15:56
BRF
Dichlorodifluoromethane (Freon 12)
0.42
0.20
0.087
2.1
0.99
0.43
4
3/28/19 15:56
BRF
1, 1 -Dichloroethane
ND
0.20
0.061
ND
0.81
0.25
4
3/28/19 15:56
BRF
1,2-Dichloroethane
ND
0.20
0.076
ND
0.81
0.31
4
3/28/19 15:56
BRF
1, 1 -Dichloroethylene
ND
0.20
0.081
ND
0.79
0.32
4
3/28/19 15:56
BRF
cis-1,2-Dichloroethylene
ND
0.20
0.082
ND
0.79
0.32
4
3/28/19 15:56
BRF
trans-1,2-Dichloroethylene
ND
0.20
0.081
ND
0.79
0.32
4
3/28/19 15:56
BRF
1,2-Dichloropropane
ND
0.20
0.071
V-05, L-03
ND
0.92
0.33
4
3/28/19 15:56
BRF
cis-1,3-Dichloropropene
ND
0.20
0.070
ND
0.91
0.32
4
3/28/19 15:56
BRF
trans-1,3-Dichloropropene
ND
0.20
0.073
ND
0.91
0.33
4
3/28/19 15:56
BRF
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114) ND
0.20
0.10
ND
1.4
0.70
4
3/28/19 15:56
BRF
1,4-Dioxane
ND
2.0
1.3
ND
7.2
4.6
4
3/28/19 15:56
BRF
Ethanol
100
8.0
3.6
200
15
6.7
4
3/28/19 15:56
BRF
Ethyl Acetate
ND
0.20
0.15
ND
0.72
0.54
4
3/28/19 15:56
BRF
Ethylbenzene
ND
0.20
0.12
ND
0.87
0.50
4
3/28/19 15:56
BRF
4-Ethyltoluene
ND
0.20
0.12
ND
0.98
0.60
4
3/28/19 15:56
BRF
Heptane
ND
0.20
0.12
V-05, L-03
ND
0.82
0.48
4
3/28/19 15:56
BRF
Hexachlorobutadiene
ND
0.20
0.092
ND
2.1
0.98
4
3/28/19 15:56
BRF
Hexane
ND
8.0
0.35
ND
28
1.2
4
3/28/19 15:56
BRF
2-Hexanone (MBK)
ND
0.20
0.12
V-05, L-03
ND
0.82
0.48
4
3/28/19 15:56
BRF
Isopropanol
1.2
8.0
0.25
J
3.0
20
0.60
4
3/28/19 15:56
BRF
Methyl tert-Butyl Ether (MTBE)
ND
0.20
0.10
ND
0.72
0.36
4
3/28/19 15:56
BRF
Methylene Chloride
ND
2.0
0.24
ND
6.9
0.84
4
3/28/19 15:56
BRF
4-Methyl-2-pentanone (MIBK)
ND
0.20
0.096
ND
0.82
0.39
4
3/28/19 15:56
BRF
Naphthalene
ND
0.20
0.15
ND
1.0
0.80
4
3/28/19 15:56
BRF
Propene
ND
8.0
0.20
ND
14
0.34
4
3/28/19 15:56
BRF
Styrene
ND
0.20
0.12
ND
0.85
0.53
4
3/28/19 15:56
BRF
1,1,2,2-Tetrachloroethane
ND
0.20
0.089
ND
1.4
0.61
4
3/28/19 15:56
BRF
Page 4 of 33

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Project Location: Raleigh, NC
Sample Description/Location:
Work Order: 19C1255
Date Received: 3/20/2019
Sub Description/Location:
Initial Vacuum(in Hg): -30
Field Sample #: SG-1
Canister ID: 2383
Final Vacuum(in Hg): -5
Sample ID: 19C1255-01
Canister Size: 3 liter
Receipt Vacuum(in Hg): -2.8
Sample Matrix: Sub Slab
Flow Controller ID: 4038
Flow Controller Type: Fixed -Orifice
Sampled: 3/19/2019 18:18
Sample Type: 15 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
0.13
0.20
0.11
J
0.90
1.4
0.75
4
3/28/19 15:56
BRF
Tetrahydrofuran
0.88
0.20
0.13
2.6
0.59
0.39
4
3/28/19 15:56
BRF
Toluene
0.44
0.20
0.10
1.6
0.75
0.39
4
3/28/19 15:56
BRF
1,2,4-Trichlorobenzene
ND
0.20
0.14
ND
1.5
1.0
4
3/28/19 15:56
BRF
1, 1, 1 -Trichloroethane
ND
0.20
0.075
L-03
ND
1.1
0.41
4
3/28/19 15:56
BRF
1,1,2-Trichloroethane
ND
0.20
0.082
ND
1.1
0.45
4
3/28/19 15:56
BRF
Trichloroethylene
ND
0.20
0.081
ND
1.1
0.43
4
3/28/19 15:56
BRF
Trichlorofluoromethane (Freon 11)
0.86
0.80
0.12
4.8
4.5
0.65
4
3/28/19 15:56
BRF
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)
ND
0.80
0.12
ND
6.1
0.93
4
3/28/19 15:56
BRF
1,2,4-Trimethylbenzene
ND
0.20
0.13
ND
0.98
0.63
4
3/28/19 15:56
BRF
1,3,5-Trimethylbenzene
ND
0.20
0.13
ND
0.98
0.62
4
3/28/19 15:56
BRF
Vinyl Acetate
ND
4.0
0.095
V-05
ND
14
0.34
4
3/28/19 15:56
BRF
Vinyl Chloride
ND
0.20
0.13
ND
0.51
0.32
4
3/28/19 15:56
BRF
m&p-Xylene
0.28
0.40
0.23
J
1.2
1.7
1.00
4
3/28/19 15:56
BRF
o-Xylene
0.14
0.20
0.12
J
0.59
0.87
0.54
4
3/28/19 15:56
BRF
Surrogates % Recovery % REC Limits
4-Bromofluorobenzene(1) 105 70-130 3/28/19 15:56
Page 5 of 33

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ANALYTICAL LABORATORY
Project Location: Raleigh, NC
Date Received: 3/20/2019
Field Sample #: SG-2
Sample ID: 19C1255-02
Sample Matrix: Sub Slab
Sampled: 3/19/2019 16:32
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Sample Description/Location: Work Order: 19C1255
Sub Description/Location: Initial Vacuum(in Hg): -28.5
Canister ID: 2375 Final Vacuum(in Hg): -5
Canister Size: 3 liter Receipt Vacuum(in Hg): -5.2
Flow Controller ID: 4186 Flow Controller Type: Fixed -Orifice
Sample Type: 30 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
9.7
8.0
2.8
23
19
6.6
4
3/28/19 17:17
BRF
Benzene
0.33
0.20
0.082
1.0
0.64
0.26
4
3/28/19 17:17
BRF
Benzyl chloride
ND
0.20
0.044
ND
1.0
0.23
4
3/28/19 17:17
BRF
Bromodichloromethane
ND
0.20
0.074
ND
1.3
0.49
4
3/28/19 17:17
BRF
Bromoform
ND
0.20
0.090
ND
2.1
0.93
4
3/28/19 17:17
BRF
Bromomethane
ND
0.20
0.14
ND
0.78
0.53
4
3/28/19 17:17
BRF
1,3-Butadiene
ND
0.20
0.13
ND
0.44
0.28
4
3/28/19 17:17
BRF
2-Butanone (MEK)
2.2
8.0
0.31
J
6.5
24
0.92
4
3/28/19 17:17
BRF
Carbon Disulfide
ND
2.0
0.14
ND
6.2
0.43
4
3/28/19 17:17
BRF
Carbon Tetrachloride
ND
0.20
0.065
ND
1.3
0.41
4
3/28/19 17:17
BRF
Chlorobenzene
ND
0.20
0.098
ND
0.92
0.45
4
3/28/19 17:17
BRF
Chloroethane
ND
0.20
0.12
ND
0.53
0.32
4
3/28/19 17:17
BRF
Chloroform
ND
0.20
0.074
ND
0.98
0.36
4
3/28/19 17:17
BRF
Chloromethane
ND
0.40
0.14
ND
0.83
0.28
4
3/28/19 17:17
BRF
Cyclohexane
ND
0.20
0.14
ND
0.69
0.49
4
3/28/19 17:17
BRF
Dibromochloromethane
ND
0.20
0.066
ND
1.7
0.57
4
3/28/19 17:17
BRF
1,2-Dibromoethane (EDB)
ND
0.20
0.078
ND
1.5
0.60
4
3/28/19 17:17
BRF
1,2-Dichlorobenzene
ND
0.20
0.096
ND
1.2
0.58
4
3/28/19 17:17
BRF
1,3-Dichlorobenzene
0.29
0.20
0.10
1.7
1.2
0.62
4
3/28/19 17:17
BRF
1,4-Dichlorobenzene
ND
0.20
0.12
ND
1.2
0.73
4
3/28/19 17:17
BRF
Dichlorodifluoromethane (Freon 12)
0.43
0.20
0.087
2.1
0.99
0.43
4
3/28/19 17:17
BRF
1,1-Dichloroethane
ND
0.20
0.061
ND
0.81
0.25
4
3/28/19 17:17
BRF
1,2-Dichloroethane
ND
0.20
0.076
ND
0.81
0.31
4
3/28/19 17:17
BRF
1,1-Dichloroethylene
ND
0.20
0.081
ND
0.79
0.32
4
3/28/19 17:17
BRF
cis-1,2-Dichloroethylene
ND
0.20
0.082
ND
0.79
0.32
4
3/28/19 17:17
BRF
trans-1,2-Dichloroethylene
0.12
0.20
0.081
J
0.48
0.79
0.32
4
3/28/19 17:17
BRF
1,2-Dichloropropane
ND
0.20
0.071
L-03, V-05
ND
0.92
0.33
4
3/28/19 17:17
BRF
cis-1,3-Dichloropropene
ND
0.20
0.070
ND
0.91
0.32
4
3/28/19 17:17
BRF
trans-1,3-Dichloropropene
ND
0.20
0.073
ND
0.91
0.33
4
3/28/19 17:17
BRF
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114) ND
0.20
0.10
ND
1.4
0.70
4
3/28/19 17:17
BRF
1,4-Dioxane
ND
2.0
1.3
ND
7.2
4.6
4
3/28/19 17:17
BRF
Ethanol
7.1
8.0
3.6
J
13
15
6.7
4
3/28/19 17:17
BRF
Ethyl Acetate
1.2
0.20
0.15
4.2
0.72
0.54
4
3/28/19 17:17
BRF
Ethylbenzene
0.34
0.20
0.12
1.5
0.87
0.50
4
3/28/19 17:17
BRF
4-Ethyltoluene
ND
0.20
0.12
ND
0.98
0.60
4
3/28/19 17:17
BRF
Heptane
ND
0.20
0.12
L-03, V-05
ND
0.82
0.48
4
3/28/19 17:17
BRF
Hexachlorobutadiene
ND
0.20
0.092
ND
2.1
0.98
4
3/28/19 17:17
BRF
Hexane
ND
8.0
0.35
ND
28
1.2
4
3/28/19 17:17
BRF
2-Hexanone (MBK)
ND
0.20
0.12
L-03, V-05
ND
0.82
0.48
4
3/28/19 17:17
BRF
Isopropanol
ND
8.0
0.25
ND
20
0.60
4
3/28/19 17:17
BRF
Methyl tert-Butyl Ether (MTBE)
ND
0.20
0.10
ND
0.72
0.36
4
3/28/19 17:17
BRF
Methylene Chloride
ND
2.0
0.24
ND
6.9
0.84
4
3/28/19 17:17
BRF
4-Methyl-2-pentanone (MIBK)
ND
0.20
0.096
ND
0.82
0.39
4
3/28/19 17:17
BRF
Naphthalene
ND
0.20
0.15
ND
1.0
0.80
4
3/28/19 17:17
BRF
Propene
ND
8.0
0.20
ND
14
0.34
4
3/28/19 17:17
BRF
Styrene
ND
0.20
0.12
ND
0.85
0.53
4
3/28/19 17:17
BRF
1,1,2,2-Tetrachloroethane
ND
0.20
0.089
ND
1.4
0.61
4
3/28/19 17:17
BRF
Page 6 of 33

icon-tes w .
ANALYTICAL LABORATORY
Project Location: Raleigh, NC
Date Received: 3/20/2019
Field Sample #: SG-2
Sample ID: 19C1255-02
Sample Matrix: Sub Slab
Sampled: 3/ 19/2019 16:32
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Sample Description/Location:
Sub Description/Location:
Canister ID: 2375
Canister Size: 3 liter
Flow Controller ID: 4186
Sample Type: 30 min
Work Order: 19C1255
Initial Vacuum(in Hg): -28.5
Final Vacuum(in Hg): -5
Receipt Vacuum(in Hg): -5.2
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
ND
0.20
0.11
ND
1.4
0.75
4
3/28/19 17:17
BRF
Tetrahydrofuran
5.2
0.20
0.13
15
0.59
0.39
4
3/28/19 17:17
BRF
Toluene
4.0
0.20
0.10
15
0.75
0.39
4
3/28/19 17:17
BRF
1,2,4-Trichlorobenzene
ND
0.20
0.14
ND
1.5
1.0
4
3/28/19 17:17
BRF
1, 1, 1 -Trichloroethane
ND
0.20
0.075
L-03 ND
1.1
0.41
4
3/28/19 17:17
BRF
1,1,2-Trichloroethane
ND
0.20
0.082
ND
1.1
0.45
4
3/28/19 17:17
BRF
Trichloroethylene
ND
0.20
0.081
ND
1.1
0.43
4
3/28/19 17:17
BRF
Trichlorofluoromethane (Freon 11)
0.42
0.80
0.12
J 2.4
4.5
0.65
4
3/28/19 17:17
BRF
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)
ND
0.80
0.12
ND
6.1
0.93
4
3/28/19 17:17
BRF
1,2,4-Trimethylbenzene
ND
0.20
0.13
ND
0.98
0.63
4
3/28/19 17:17
BRF
1,3,5-Trimethylbenzene
ND
0.20
0.13
ND
0.98
0.62
4
3/28/19 17:17
BRF
Vinyl Acetate
0.82
4.0
0.095
V-05, J 2.9
14
0.34
4
3/28/19 17:17
BRF
Vinyl Chloride
ND
0.20
0.13
ND
0.51
0.32
4
3/28/19 17:17
BRF
m&p-Xylene
1.3
0.40
0.23
5.6
1.7
1.00
4
3/28/19 17:17
BRF
o-Xylene
0.51
0.20
0.12
2.2
0.87
0.54
4
3/28/19 17:17
BRF
Surrogates
4-Bromofluorobenzene (1)
% Recovery
106
% REC Limits
70-130
3/28/19 17:17
Page 7 of 33

icon-tes w .
ANALYTICAL LABORATORY
Project Location: Raleigh, NC
Date Received: 3/20/2019
Field Sample #: SG-2 DUP
Sample ID: 19C1255-03
Sample Matrix: Sub Slab
Sampled: 3/19/2019 16:32
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Sample Description/Location: Work Order: 19C1255
Sub Description/Location: Initial Vacuum(in Hg): -28.5
Canister ID: 2350 Final Vacuum(in Hg): -5
Canister Size: 3 liter Receipt Vacuum(in Hg): -5.2
Flow Controller ID: 4186 Flow Controller Type: Fixed -Orifice
Sample Type: 30 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
9.1
8.0
2.8
22
19
6.6
4
3/28/19 17:58
BRF
Benzene
0.33
0.20
0.082
1.1
0.64
0.26
4
3/28/19 17:58
BRF
Benzyl chloride
ND
0.20
0.044
ND
1.0
0.23
4
3/28/19 17:58
BRF
Bromodichloromethane
ND
0.20
0.074
ND
1.3
0.49
4
3/28/19 17:58
BRF
Bromoform
ND
0.20
0.090
ND
2.1
0.93
4
3/28/19 17:58
BRF
Bromomethane
ND
0.20
0.14
ND
0.78
0.53
4
3/28/19 17:58
BRF
1,3-Butadiene
ND
0.20
0.13
ND
0.44
0.28
4
3/28/19 17:58
BRF
2-Butanone (MEK)
2.2
8.0
0.31
J
6.4
24
0.92
4
3/28/19 17:58
BRF
Carbon Disulfide
ND
2.0
0.14
ND
6.2
0.43
4
3/28/19 17:58
BRF
Carbon Tetrachloride
ND
0.20
0.065
ND
1.3
0.41
4
3/28/19 17:58
BRF
Chlorobenzene
ND
0.20
0.098
ND
0.92
0.45
4
3/28/19 17:58
BRF
Chloroethane
ND
0.20
0.12
ND
0.53
0.32
4
3/28/19 17:58
BRF
Chloroform
ND
0.20
0.074
ND
0.98
0.36
4
3/28/19 17:58
BRF
Chloromethane
ND
0.40
0.14
ND
0.83
0.28
4
3/28/19 17:58
BRF
Cyclohexane
ND
0.20
0.14
ND
0.69
0.49
4
3/28/19 17:58
BRF
Dibromochloromethane
ND
0.20
0.066
ND
1.7
0.57
4
3/28/19 17:58
BRF
1,2-Dibromoethane (EDB)
ND
0.20
0.078
ND
1.5
0.60
4
3/28/19 17:58
BRF
1,2-Dichlorobenzene
ND
0.20
0.096
ND
1.2
0.58
4
3/28/19 17:58
BRF
1,3-Dichlorobenzene
0.30
0.20
0.10
1.8
1.2
0.62
4
3/28/19 17:58
BRF
1,4-Dichlorobenzene
ND
0.20
0.12
ND
1.2
0.73
4
3/28/19 17:58
BRF
Dichlorodifluoromethane (Freon 12)
0.42
0.20
0.087
2.1
0.99
0.43
4
3/28/19 17:58
BRF
1,1-Dichloroethane
ND
0.20
0.061
ND
0.81
0.25
4
3/28/19 17:58
BRF
1,2-Dichloroethane
ND
0.20
0.076
ND
0.81
0.31
4
3/28/19 17:58
BRF
1,1-Dichloroethylene
ND
0.20
0.081
ND
0.79
0.32
4
3/28/19 17:58
BRF
cis-1,2-Dichloroethylene
ND
0.20
0.082
ND
0.79
0.32
4
3/28/19 17:58
BRF
trans-1,2-Dichloroethylene
ND
0.20
0.081
ND
0.79
0.32
4
3/28/19 17:58
BRF
1,2-Dichloropropane
ND
0.20
0.071
L-03, V-05
ND
0.92
0.33
4
3/28/19 17:58
BRF
cis-1,3-Dichloropropene
ND
0.20
0.070
ND
0.91
0.32
4
3/28/19 17:58
BRF
trans-1,3-Dichloropropene
ND
0.20
0.073
ND
0.91
0.33
4
3/28/19 17:58
BRF
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114) ND
0.20
0.10
ND
1.4
0.70
4
3/28/19 17:58
BRF
1,4-Dioxane
ND
2.0
1.3
ND
7.2
4.6
4
3/28/19 17:58
BRF
Ethanol
6.6
8.0
3.6
J
13
15
6.7
4
3/28/19 17:58
BRF
Ethyl Acetate
0.81
0.20
0.15
2.9
0.72
0.54
4
3/28/19 17:58
BRF
Ethylbenzene
0.33
0.20
0.12
1.4
0.87
0.50
4
3/28/19 17:58
BRF
4-Ethyltoluene
ND
0.20
0.12
ND
0.98
0.60
4
3/28/19 17:58
BRF
Heptane
0.15
0.20
0.12
L-03, V-05, J
0.62
0.82
0.48
4
3/28/19 17:58
BRF
Hexachlorobutadiene
ND
0.20
0.092
ND
2.1
0.98
4
3/28/19 17:58
BRF
Hexane
ND
8.0
0.35
ND
28
1.2
4
3/28/19 17:58
BRF
2-Hexanone (MBK)
ND
0.20
0.12
L-03, V-05
ND
0.82
0.48
4
3/28/19 17:58
BRF
Isopropanol
0.50
8.0
0.25
J
1.2
20
0.60
4
3/28/19 17:58
BRF
Methyl tert-Butyl Ether (MTBE)
ND
0.20
0.10
ND
0.72
0.36
4
3/28/19 17:58
BRF
Methylene Chloride
ND
2.0
0.24
ND
6.9
0.84
4
3/28/19 17:58
BRF
4-Methyl-2-pentanone (MIBK)
ND
0.20
0.096
ND
0.82
0.39
4
3/28/19 17:58
BRF
Naphthalene
ND
0.20
0.15
ND
1.0
0.80
4
3/28/19 17:58
BRF
Propene
ND
8.0
0.20
ND
14
0.34
4
3/28/19 17:58
BRF
Styrene
ND
0.20
0.12
ND
0.85
0.53
4
3/28/19 17:58
BRF
1,1,2,2-Tetrachloroethane
ND
0.20
0.089
ND
1.4
0.61
4
3/28/19 17:58
BRF
Page 8 of 33

icon-tes w .
ANALYTICAL LABORATORY
Project Location: Raleigh, NC
Date Received: 3/20/2019
Field Sample #: SG-2 DUP
Sample ID: 19C1255-03
Sample Matrix: Sub Slab
Sampled: 3/ 19/2019 16:32
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Sample Description/Location:
Sub Description/Location:
Canister ID: 2350
Canister Size: 3 liter
Flow Controller ID: 4186
Sample Type: 30 min
Work Order: 19C1255
Initial Vacuum(in Hg): -28.5
Final Vacuum(in Hg): -5
Receipt Vacuum(in Hg): -5.2
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
ND
0.20
0.11
ND
1.4
0.75
4
3/28/19 17:58
BRF
Tetrahydrofuran
5.3
0.20
0.13
16
0.59
0.39
4
3/28/19 17:58
BRF
Toluene
3.5
0.20
0.10
13
0.75
0.39
4
3/28/19 17:58
BRF
1,2,4-Trichlorobenzene
ND
0.20
0.14
ND
1.5
1.0
4
3/28/19 17:58
BRF
1, 1, 1 -Trichloroethane
ND
0.20
0.075
L-03 ND
1.1
0.41
4
3/28/19 17:58
BRF
1,1,2-Trichloroethane
ND
0.20
0.082
ND
1.1
0.45
4
3/28/19 17:58
BRF
Trichloroethylene
ND
0.20
0.081
ND
1.1
0.43
4
3/28/19 17:58
BRF
Trichlorofluoromethane (Freon 11)
0.44
0.80
0.12
J 2.5
4.5
0.65
4
3/28/19 17:58
BRF
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)
ND
0.80
0.12
ND
6.1
0.93
4
3/28/19 17:58
BRF
1,2,4-Trimethylbenzene
0.62
0.20
0.13
3.0
0.98
0.63
4
3/28/19 17:58
BRF
1,3,5-Trimethylbenzene
ND
0.20
0.13
ND
0.98
0.62
4
3/28/19 17:58
BRF
Vinyl Acetate
ND
4.0
0.095
V-05 ND
14
0.34
4
3/28/19 17:58
BRF
Vinyl Chloride
ND
0.20
0.13
ND
0.51
0.32
4
3/28/19 17:58
BRF
m&p-Xylene
1.3
0.40
0.23
5.5
1.7
1.00
4
3/28/19 17:58
BRF
o-Xylene
0.52
0.20
0.12
2.2
0.87
0.54
4
3/28/19 17:58
BRF
Surrogates
4-Bromofluorobenzene (1)
% Recovery
107
% REC Limits
70-130
3/28/19 17:58
Page 9 of 33

icon-tes w .
ANALYTICAL LABORATORY
Project Location: Raleigh, NC
Date Received: 3/20/2019
Field Sample #: SG-3
Sample ID: 19C1255-04
Sample Matrix: Sub Slab
Sampled: 3/19/2019 14:41
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Sample Description/Location: Work Order: 19C1255
Sub Description/Location: Initial Vacuum(in Hg): -28
Canister ID: 2357 Final Vacuum(in Hg): -5
Canister Size: 3 liter Receipt Vacuum(in Hg): -6.4
Flow Controller ID: 4090 Flow Controller Type: Fixed -Orifice
Sample Type: 15 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
9.2
8.0
2.8
22
19
6.6
4
3/28/19 18:39
BRF
Benzene
1.0
0.20
0.082
3.2
0.64
0.26
4
3/28/19 18:39
BRF
Benzyl chloride
ND
0.20
0.044
ND
1.0
0.23
4
3/28/19 18:39
BRF
Bromodichloromethane
ND
0.20
0.074
ND
1.3
0.49
4
3/28/19 18:39
BRF
Bromoform
ND
0.20
0.090
ND
2.1
0.93
4
3/28/19 18:39
BRF
Bromomethane
ND
0.20
0.14
ND
0.78
0.53
4
3/28/19 18:39
BRF
1,3-Butadiene
ND
0.20
0.13
ND
0.44
0.28
4
3/28/19 18:39
BRF
2-Butanone (MEK)
3.9
8.0
0.31
J
12
24
0.92
4
3/28/19 18:39
BRF
Carbon Disulfide
ND
2.0
0.14
ND
6.2
0.43
4
3/28/19 18:39
BRF
Carbon Tetrachloride
ND
0.20
0.065
ND
1.3
0.41
4
3/28/19 18:39
BRF
Chlorobenzene
ND
0.20
0.098
ND
0.92
0.45
4
3/28/19 18:39
BRF
Chloroethane
ND
0.20
0.12
ND
0.53
0.32
4
3/28/19 18:39
BRF
Chloroform
ND
0.20
0.074
ND
0.98
0.36
4
3/28/19 18:39
BRF
Chloromethane
ND
0.40
0.14
ND
0.83
0.28
4
3/28/19 18:39
BRF
Cyclohexane
ND
0.20
0.14
ND
0.69
0.49
4
3/28/19 18:39
BRF
Dibromochloromethane
ND
0.20
0.066
ND
1.7
0.57
4
3/28/19 18:39
BRF
1,2-Dibromoethane (EDB)
ND
0.20
0.078
ND
1.5
0.60
4
3/28/19 18:39
BRF
1,2-Dichlorobenzene
ND
0.20
0.096
ND
1.2
0.58
4
3/28/19 18:39
BRF
1,3-Dichlorobenzene
0.32
0.20
0.10
1.9
1.2
0.62
4
3/28/19 18:39
BRF
1,4-Dichlorobenzene
ND
0.20
0.12
ND
1.2
0.73
4
3/28/19 18:39
BRF
Dichlorodifluoromethane (Freon 12)
0.42
0.20
0.087
2.1
0.99
0.43
4
3/28/19 18:39
BRF
1,1-Dichloroethane
ND
0.20
0.061
ND
0.81
0.25
4
3/28/19 18:39
BRF
1,2-Dichloroethane
ND
0.20
0.076
ND
0.81
0.31
4
3/28/19 18:39
BRF
1,1-Dichloroethylene
ND
0.20
0.081
ND
0.79
0.32
4
3/28/19 18:39
BRF
cis-1,2-Dichloroethylene
ND
0.20
0.082
ND
0.79
0.32
4
3/28/19 18:39
BRF
trans-1,2-Dichloroethylene
ND
0.20
0.081
ND
0.79
0.32
4
3/28/19 18:39
BRF
1,2-Dichloropropane
ND
0.20
0.071
L-03, V-05
ND
0.92
0.33
4
3/28/19 18:39
BRF
cis-1,3-Dichloropropene
ND
0.20
0.070
ND
0.91
0.32
4
3/28/19 18:39
BRF
trans-1,3-Dichloropropene
ND
0.20
0.073
ND
0.91
0.33
4
3/28/19 18:39
BRF
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114) ND
0.20
0.10
ND
1.4
0.70
4
3/28/19 18:39
BRF
1,4-Dioxane
ND
2.0
1.3
ND
7.2
4.6
4
3/28/19 18:39
BRF
Ethanol
7.3
8.0
3.6
J
14
15
6.7
4
3/28/19 18:39
BRF
Ethyl Acetate
ND
0.20
0.15
ND
0.72
0.54
4
3/28/19 18:39
BRF
Ethylbenzene
1.0
0.20
0.12
4.4
0.87
0.50
4
3/28/19 18:39
BRF
4-Ethyltoluene
0.42
0.20
0.12
2.1
0.98
0.60
4
3/28/19 18:39
BRF
Heptane
0.35
0.20
0.12
L-03, V-05
1.4
0.82
0.48
4
3/28/19 18:39
BRF
Hexachlorobutadiene
ND
0.20
0.092
ND
2.1
0.98
4
3/28/19 18:39
BRF
Hexane
ND
8.0
0.35
ND
28
1.2
4
3/28/19 18:39
BRF
2-Hexanone (MBK)
ND
0.20
0.12
L-03, V-05
ND
0.82
0.48
4
3/28/19 18:39
BRF
Isopropanol
ND
8.0
0.25
ND
20
0.60
4
3/28/19 18:39
BRF
Methyl tert-Butyl Ether (MTBE)
ND
0.20
0.10
ND
0.72
0.36
4
3/28/19 18:39
BRF
Methylene Chloride
ND
2.0
0.24
ND
6.9
0.84
4
3/28/19 18:39
BRF
4-Methyl-2-pentanone (MIBK)
ND
0.20
0.096
ND
0.82
0.39
4
3/28/19 18:39
BRF
Naphthalene
ND
0.20
0.15
ND
1.0
0.80
4
3/28/19 18:39
BRF
Propene
4.6
8.0
0.20
J
7.9
14
0.34
4
3/28/19 18:39
BRF
Styrene
ND
0.20
0.12
ND
0.85
0.53
4
3/28/19 18:39
BRF
1,1,2,2-Tetrachloroethane
ND
0.20
0.089
ND
1.4
0.61
4
3/28/19 18:39
BRF
Page 10 of 33

icon-tes w .
ANALYTICAL LABORATORY
Project Location: Raleigh, NC
Date Received: 3/20/2019
Field Sample #: SG-3
Sample ID: 19C1255-04
Sample Matrix: Sub Slab
Sampled: 3/ 19/2019 14:41
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Sample Description/Location:
Sub Description/Location:
Canister ID: 2357
Canister Size: 3 liter
Flow Controller ID: 4090
Sample Type: 15 min
Work Order: 19C1255
Initial Vacuum(in Hg): -28
Final Vacuum(in Hg): -5
Receipt Vacuum(in Hg): -6.4
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
ND
0.20
0.11
ND
1.4
0.75
4
3/28/19 18:39
BRF
Tetrahydrofuran
11
0.20
0.13
31
0.59
0.39
4
3/28/19 18:39
BRF
Toluene
5.1
0.20
0.10
19
0.75
0.39
4
3/28/19 18:39
BRF
1,2,4-Trichlorobenzene
ND
0.20
0.14
ND
1.5
1.0
4
3/28/19 18:39
BRF
1, 1, 1 -Trichloroethane
ND
0.20
0.075
L-03 ND
1.1
0.41
4
3/28/19 18:39
BRF
1,1,2-Trichloroethane
ND
0.20
0.082
ND
1.1
0.45
4
3/28/19 18:39
BRF
Trichloroethylene
ND
0.20
0.081
ND
1.1
0.43
4
3/28/19 18:39
BRF
Trichlorofluoromethane (Freon 11)
2.1
0.80
0.12
12
4.5
0.65
4
3/28/19 18:39
BRF
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)
ND
0.80
0.12
ND
6.1
0.93
4
3/28/19 18:39
BRF
1,2,4-Trimethylbenzene
1.8
0.20
0.13
8.9
0.98
0.63
4
3/28/19 18:39
BRF
1,3,5-Trimethylbenzene
0.40
0.20
0.13
1.9
0.98
0.62
4
3/28/19 18:39
BRF
Vinyl Acetate
ND
4.0
0.095
V-05 ND
14
0.34
4
3/28/19 18:39
BRF
Vinyl Chloride
ND
0.20
0.13
ND
0.51
0.32
4
3/28/19 18:39
BRF
m&p-Xylene
4.4
0.40
0.23
19
1.7
1.00
4
3/28/19 18:39
BRF
o-Xylene
1.6
0.20
0.12
7.0
0.87
0.54
4
3/28/19 18:39
BRF
Surrogates
4-Bromofluorobenzene (1)
% Recovery
108
% REC Limits
70-130
3/28/19 18:39
Page 11 of 33

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Project Location: Raleigh, NC
Sample Description/Location:
Work Order: 19C1255
Date Received: 3/20/2019
Sub Description/Location:
Initial Vacuum(in Hg): -30
Field Sample #: SG-4
Canister ID: 2354
Final Vacuum(in Hg): -5
Sample ID: 19C1255-05
Canister Size: 3 liter
Receipt Vacuum(in Hg): -4
Sample Matrix: Sub Slab
Flow Controller ID: 4039
Flow Controller Type: Fixed -Orifice
Sampled: 3/19/2019 19:05
Sample Type: 15 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
4.8
8.0
2.8
J
11
19
6.6
4
3/28/19 19:20
BRF
Benzene
ND
0.20
0.082
ND
0.64
0.26
4
3/28/19 19:20
BRF
Benzyl chloride
ND
0.20
0.044
ND
1.0
0.23
4
3/28/19 19:20
BRF
Bromodichloromethane
ND
0.20
0.074
ND
1.3
0.49
4
3/28/19 19:20
BRF
Bromoform
ND
0.20
0.090
ND
2.1
0.93
4
3/28/19 19:20
BRF
Bromomethane
ND
0.20
0.14
ND
0.78
0.53
4
3/28/19 19:20
BRF
1,3-Butadiene
ND
0.20
0.13
ND
0.44
0.28
4
3/28/19 19:20
BRF
2-Butanone (MEK)
0.83
8.0
0.31
J
2.5
24
0.92
4
3/28/19 19:20
BRF
Carbon Disulfide
ND
2.0
0.14
ND
6.2
0.43
4
3/28/19 19:20
BRF
Carbon Tetrachloride
ND
0.20
0.065
ND
1.3
0.41
4
3/28/19 19:20
BRF
Chlorobenzene
ND
0.20
0.098
ND
0.92
0.45
4
3/28/19 19:20
BRF
Chloroethane
ND
0.20
0.12
ND
0.53
0.32
4
3/28/19 19:20
BRF
Chloroform
ND
0.20
0.074
ND
0.98
0.36
4
3/28/19 19:20
BRF
Chloromethane
ND
0.40
0.14
ND
0.83
0.28
4
3/28/19 19:20
BRF
Cyclohexane
ND
0.20
0.14
ND
0.69
0.49
4
3/28/19 19:20
BRF
Dibromochloromethane
ND
0.20
0.066
ND
1.7
0.57
4
3/28/19 19:20
BRF
1,2-Dibromoethane (EDB)
ND
0.20
0.078
ND
1.5
0.60
4
3/28/19 19:20
BRF
1,2-Dichlorobenzene
ND
0.20
0.096
ND
1.2
0.58
4
3/28/19 19:20
BRF
1,3-Dichlorobenzene
ND
0.20
0.10
ND
1.2
0.62
4
3/28/19 19:20
BRF
1,4-Dichlorobenzene
ND
0.20
0.12
ND
1.2
0.73
4
3/28/19 19:20
BRF
Dichlorodifluoromethane (Freon 12)
1.6
0.20
0.087
8.1
0.99
0.43
4
3/28/19 19:20
BRF
1,1-Dichloroethane
ND
0.20
0.061
ND
0.81
0.25
4
3/28/19 19:20
BRF
1,2-Dichloroethane
ND
0.20
0.076
ND
0.81
0.31
4
3/28/19 19:20
BRF
1,1-Dichloroethylene
ND
0.20
0.081
ND
0.79
0.32
4
3/28/19 19:20
BRF
cis-1,2-Dichloroethylene
ND
0.20
0.082
ND
0.79
0.32
4
3/28/19 19:20
BRF
trans-1,2-Dichloroethylene
ND
0.20
0.081
ND
0.79
0.32
4
3/28/19 19:20
BRF
1,2-Dichloropropane
ND
0.20
0.071
L-03, V-05
ND
0.92
0.33
4
3/28/19 19:20
BRF
cis-1,3-Dichloropropene
ND
0.20
0.070
ND
0.91
0.32
4
3/28/19 19:20
BRF
trans-1,3-Dichloropropene
ND
0.20
0.073
ND
0.91
0.33
4
3/28/19 19:20
BRF
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114)
ND
0.20
0.10
ND
1.4
0.70
4
3/28/19 19:20
BRF
1,4-Dioxane
ND
2.0
1.3
ND
7.2
4.6
4
3/28/19 19:20
BRF
Ethanol
77
8.0
3.6
140
15
6.7
4
3/28/19 19:20
BRF
Ethyl Acetate
ND
0.20
0.15
ND
0.72
0.54
4
3/28/19 19:20
BRF
Ethylbenzene
ND
0.20
0.12
ND
0.87
0.50
4
3/28/19 19:20
BRF
4-Ethyltoluene
ND
0.20
0.12
ND
0.98
0.60
4
3/28/19 19:20
BRF
Heptane
ND
0.20
0.12
L-03, V-05
ND
0.82
0.48
4
3/28/19 19:20
BRF
Hexachlorobutadiene
ND
0.20
0.092
ND
2.1
0.98
4
3/28/19 19:20
BRF
Hexane
ND
8.0
0.35
ND
28
1.2
4
3/28/19 19:20
BRF
2-Hexanone (MBK)
ND
0.20
0.12
L-03, V-05
ND
0.82
0.48
4
3/28/19 19:20
BRF
Isopropanol
ND
8.0
0.25
ND
20
0.60
4
3/28/19 19:20
BRF
Methyl tert-Butyl Ether (MTBE)
ND
0.20
0.10
ND
0.72
0.36
4
3/28/19 19:20
BRF
Methylene Chloride
ND
2.0
0.24
ND
6.9
0.84
4
3/28/19 19:20
BRF
4-Methyl-2-pentanone (MIBK)
ND
0.20
0.096
ND
0.82
0.39
4
3/28/19 19:20
BRF
Naphthalene
ND
0.20
0.15
ND
1.0
0.80
4
3/28/19 19:20
BRF
Propene
ND
8.0
0.20
ND
14
0.34
4
3/28/19 19:20
BRF
Styrene
ND
0.20
0.12
ND
0.85
0.53
4
3/28/19 19:20
BRF
1,1,2,2-Tetrachloroethane
ND
0.20
0.089
ND
1.4
0.61
4
3/28/19 19:20
BRF
Page 12 of 33

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Project Location: Raleigh, NC
Sample Description/Location:
Work Order: 19C1255
Date Received: 3/20/2019
Sub Description/Location:
Initial Vacuum(in Hg): -30
Field Sample #: SG-4
Canister ID: 2354
Final Vacuum(in Hg): -5
Sample ID: 19C1255-05
Canister Size: 3 liter
Receipt Vacuum(in Hg): -4
Sample Matrix: Sub Slab
Flow Controller ID: 4039
Flow Controller Type: Fixed -Orifice
Sampled: 3/19/2019 19:05
Sample Type: 15 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
0.16
0.20
0.11
J 1.1
1.4
0.75
4
3/28/19 19:20
BRF
Tetrahydrofuran
0.66
0.20
0.13
1.9
0.59
0.39
4
3/28/19 19:20
BRF
Toluene
0.44
0.20
0.10
1.6
0.75
0.39
4
3/28/19 19:20
BRF
1,2,4-Trichlorobenzene
ND
0.20
0.14
ND
1.5
1.0
4
3/28/19 19:20
BRF
1, 1, 1 -Trichloroethane
ND
0.20
0.075
L-03 ND
1.1
0.41
4
3/28/19 19:20
BRF
1,1,2-Trichloroethane
ND
0.20
0.082
ND
1.1
0.45
4
3/28/19 19:20
BRF
Trichloroethylene
ND
0.20
0.081
ND
1.1
0.43
4
3/28/19 19:20
BRF
Trichlorofluoromethane (Freon 11)
550
8.0
1.2
3100
45
6.5
40
3/28/19 20:00
BRF
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)
ND
0.80
0.12
ND
6.1
0.93
4
3/28/19 19:20
BRF
1,2,4-Trimethylbenzene
ND
0.20
0.13
ND
0.98
0.63
4
3/28/19 19:20
BRF
1,3,5-Trimethylbenzene
ND
0.20
0.13
ND
0.98
0.62
4
3/28/19 19:20
BRF
Vinyl Acetate
0.66
4.0
0.095
V-05, J 2.3
14
0.34
4
3/28/19 19:20
BRF
Vinyl Chloride
ND
0.20
0.13
ND
0.51
0.32
4
3/28/19 19:20
BRF
m&p-Xylene
ND
0.40
0.23
ND
1.7
1.00
4
3/28/19 19:20
BRF
o-Xylene
ND
0.20
0.12
ND
0.87
0.54
4
3/28/19 19:20
BRF
Surrogates
% Recovery
% REC Limits
4-Bromofluorobenzene (1)
107
70-130
3/28/19 20:00
4-Bromofluorobenzene (1)
106
70-130
3/28/19 19:20
Page 13 of 33

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Project Location: Raleigh, NC
Sample Description/Location:
Work Order: 19C1255
Date Received: 3/20/2019
Sub Description/Location:
Initial Vacuum(in Hg): -28
Field Sample #: SG-5
Canister ID: 2416
Final Vacuum(in Hg): -5
Sample ID: 19C1255-06
Canister Size: 3 liter
Receipt Vacuum(in Hg): -7
Sample Matrix: Sub Slab
Flow Controller ID: 4303
Flow Controller Type: Fixed -Orifice
Sampled: 3/19/2019 15:17
Sample Type: 15 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
6.9
8.0
2.8
J
17
19
6.6
4
3/28/19 20:40
BRF
Benzene
0.75
0.20
0.082
2.4
0.64
0.26
4
3/28/19 20:40
BRF
Benzyl chloride
ND
0.20
0.044
ND
1.0
0.23
4
3/28/19 20:40
BRF
Bromodichloromethane
ND
0.20
0.074
ND
1.3
0.49
4
3/28/19 20:40
BRF
Bromoform
ND
0.20
0.090
ND
2.1
0.93
4
3/28/19 20:40
BRF
Bromomethane
ND
0.20
0.14
ND
0.78
0.53
4
3/28/19 20:40
BRF
1,3-Butadiene
ND
0.20
0.13
ND
0.44
0.28
4
3/28/19 20:40
BRF
2-Butanone (MEK)
2.7
8.0
0.31
J
8.0
24
0.92
4
3/28/19 20:40
BRF
Carbon Disulfide
ND
2.0
0.14
ND
6.2
0.43
4
3/28/19 20:40
BRF
Carbon Tetrachloride
ND
0.20
0.065
ND
1.3
0.41
4
3/28/19 20:40
BRF
Chlorobenzene
ND
0.20
0.098
ND
0.92
0.45
4
3/28/19 20:40
BRF
Chloroethane
ND
0.20
0.12
ND
0.53
0.32
4
3/28/19 20:40
BRF
Chloroform
ND
0.20
0.074
ND
0.98
0.36
4
3/28/19 20:40
BRF
Chloromethane
ND
0.40
0.14
ND
0.83
0.28
4
3/28/19 20:40
BRF
Cyclohexane
ND
0.20
0.14
ND
0.69
0.49
4
3/28/19 20:40
BRF
Dibromochloromethane
ND
0.20
0.066
ND
1.7
0.57
4
3/28/19 20:40
BRF
1,2-Dibromoethane (EDB)
ND
0.20
0.078
ND
1.5
0.60
4
3/28/19 20:40
BRF
1,2-Dichlorobenzene
ND
0.20
0.096
ND
1.2
0.58
4
3/28/19 20:40
BRF
1,3-Dichlorobenzene
0.28
0.20
0.10
1.7
1.2
0.62
4
3/28/19 20:40
BRF
1,4-Dichlorobenzene
ND
0.20
0.12
ND
1.2
0.73
4
3/28/19 20:40
BRF
Dichlorodifluoromethane (Freon 12)
0.58
0.20
0.087
2.8
0.99
0.43
4
3/28/19 20:40
BRF
1,1-Dichloroethane
ND
0.20
0.061
ND
0.81
0.25
4
3/28/19 20:40
BRF
1,2-Dichloroethane
ND
0.20
0.076
ND
0.81
0.31
4
3/28/19 20:40
BRF
1,1-Dichloroethylene
ND
0.20
0.081
ND
0.79
0.32
4
3/28/19 20:40
BRF
cis-1,2-Dichloroethylene
ND
0.20
0.082
ND
0.79
0.32
4
3/28/19 20:40
BRF
trans-1,2-Dichloroethylene
ND
0.20
0.081
ND
0.79
0.32
4
3/28/19 20:40
BRF
1,2-Dichloropropane
ND
0.20
0.071
L-03, V-05
ND
0.92
0.33
4
3/28/19 20:40
BRF
cis-1,3-Dichloropropene
ND
0.20
0.070
ND
0.91
0.32
4
3/28/19 20:40
BRF
trans-1,3-Dichloropropene
ND
0.20
0.073
ND
0.91
0.33
4
3/28/19 20:40
BRF
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114)
ND
0.20
0.10
ND
1.4
0.70
4
3/28/19 20:40
BRF
1,4-Dioxane
ND
2.0
1.3
ND
7.2
4.6
4
3/28/19 20:40
BRF
Ethanol
13
8.0
3.6
25
15
6.7
4
3/28/19 20:40
BRF
Ethyl Acetate
ND
0.20
0.15
ND
0.72
0.54
4
3/28/19 20:40
BRF
Ethylbenzene
0.39
0.20
0.12
1.7
0.87
0.50
4
3/28/19 20:40
BRF
4-Ethyltoluene
ND
0.20
0.12
ND
0.98
0.60
4
3/28/19 20:40
BRF
Heptane
0.18
0.20
0.12
L-03, V-05, J
0.72
0.82
0.48
4
3/28/19 20:40
BRF
Hexachlorobutadiene
ND
0.20
0.092
ND
2.1
0.98
4
3/28/19 20:40
BRF
Hexane
ND
8.0
0.35
ND
28
1.2
4
3/28/19 20:40
BRF
2-Hexanone (MBK)
ND
0.20
0.12
L-03, V-05
ND
0.82
0.48
4
3/28/19 20:40
BRF
Isopropanol
ND
8.0
0.25
ND
20
0.60
4
3/28/19 20:40
BRF
Methyl tert-Butyl Ether (MTBE)
ND
0.20
0.10
ND
0.72
0.36
4
3/28/19 20:40
BRF
Methylene Chloride
ND
2.0
0.24
ND
6.9
0.84
4
3/28/19 20:40
BRF
4-Methyl-2-pentanone (MIBK)
ND
0.20
0.096
ND
0.82
0.39
4
3/28/19 20:40
BRF
Naphthalene
ND
0.20
0.15
ND
1.0
0.80
4
3/28/19 20:40
BRF
Propene
ND
8.0
0.20
ND
14
0.34
4
3/28/19 20:40
BRF
Styrene
ND
0.20
0.12
ND
0.85
0.53
4
3/28/19 20:40
BRF
1,1,2,2-Tetrachloroethane
ND
0.20
0.089
ND
1.4
0.61
4
3/28/19 20:40
BRF
Page 14 of 33

icon-tes w .
ANALYTICAL LABORATORY
Project Location: Raleigh, NC
Date Received: 3/20/2019
Field Sample #: SG-5
Sample ID: 19C1255-06
Sample Matrix: Sub Slab
Sampled: 3/ 19/2019 15:17
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Sample Description/Location:
Sub Description/Location:
Canister ID: 2416
Canister Size: 3 liter
Flow Controller ID: 4303
Sample Type: 15 min
Work Order: 19C1255
Initial Vacuum(in Hg): -28
Final Vacuum(in Hg): -5
Receipt Vacuum(in Hg): -7
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
ND
0.20
0.11
ND
1.4
0.75
4
3/28/19 20:40
BRF
Tetrahydrofuran
5.2
0.20
0.13
15
0.59
0.39
4
3/28/19 20:40
BRF
Toluene
2.1
0.20
0.10
8.0
0.75
0.39
4
3/28/19 20:40
BRF
1,2,4-Trichlorobenzene
ND
0.20
0.14
ND
1.5
1.0
4
3/28/19 20:40
BRF
1, 1, 1 -Trichloroethane
ND
0.20
0.075
L-03
ND
1.1
0.41
4
3/28/19 20:40
BRF
1,1,2-Trichloroethane
ND
0.20
0.082
ND
1.1
0.45
4
3/28/19 20:40
BRF
Trichloroethylene
ND
0.20
0.081
ND
1.1
0.43
4
3/28/19 20:40
BRF
Trichlorofluoromethane (Freon 11)
0.53
0.80
0.12
J
3.0
4.5
0.65
4
3/28/19 20:40
BRF
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)
ND
0.80
0.12
ND
6.1
0.93
4
3/28/19 20:40
BRF
1,2,4-Trimethylbenzene
0.71
0.20
0.13
3.5
0.98
0.63
4
3/28/19 20:40
BRF
1,3,5-Trimethylbenzene
0.16
0.20
0.13
J
0.81
0.98
0.62
4
3/28/19 20:40
BRF
Vinyl Acetate
ND
4.0
0.095
V-05
ND
14
0.34
4
3/28/19 20:40
BRF
Vinyl Chloride
ND
0.20
0.13
ND
0.51
0.32
4
3/28/19 20:40
BRF
m&p-Xylene
1.5
0.40
0.23
6.4
1.7
1.00
4
3/28/19 20:40
BRF
o-Xylene
0.56
0.20
0.12
2.4
0.87
0.54
4
3/28/19 20:40
BRF
Surrogates
4-Bromofluorobenzene (1)
% Recovery
106
% REC Limits
70-130
3/28/19 20:40
Page 15 of 33

icon-tes w .
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 ID1
Batch
Dilution Dilution mL
mL
mL
mL
Date
19C1255-01 [SG-1]
B226969
1.5 1 N/A
1000
400
150
03/28/19
19C1255-02 [SG-2]
B226969
1.5 1 N/A
1000
400
150
03/28/19
19C1255-03 [SG-2 DUP]
B226969
1.5 1 N/A
1000
400
150
03/28/19
19C1255-04 [SG-3]
B226969
1.5 1 N/A
1000
400
150
03/28/19
190255-05 [SG-4]
B226969
1.5 1 N/A
1000
400
150
03/28/19
19C1255-05RE1 [SG-4]
B226969
1.5 1 N/A
1000
400
15
03/28/19
190255-06 [SG-5]
B226969
1.5 1 N/A
1000
400
150
03/28/19
Page 16 of 33

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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
malyte Results RL Results RL ppbv Result %REC Limits RPD Limit Flag/Qua
Batch B226969 - TO-15 Prep
Blank (B226969-BLK1)
Prepared & Analyzed: 03/28/19
Acetone
ND
1.4
Benzene
ND
0.035
Benzyl chloride
ND
0.035
Bromodichloromethane
ND
0.035
Bromoform
ND
0.035
Bromomethane
ND
0.035
1,3-Butadiene
ND
0.035
2-Butanone (MEK)
ND
1.4
Carbon Disulfide
ND
0.35
Carbon Tetrachloride
ND
0.035
Chlorobenzene
ND
0.035
Chloroethane
ND
0.035
Chloroform
ND
0.035
Chloromethane
ND
0.070
Cyclohexane
ND
0.035
Dibromochloromethane
ND
0.035
1,2-Dibromoethane (EDB)
ND
0.035
1,2-Dichlorobenzene
ND
0.035
1,3-Dichlorobenzene
ND
0.035
114-Dichlorobenzene
ND
0.035
Dichlorodifluoromethane (Freon 12)
ND
0.035
1,1-Dichloroethane
ND
0.035
1,2-Dichloroethane
ND
0.035
1,1-Dichloroethylene
ND
0.035
cis-1,2-Dichloroethylene
ND
0.035
trans-1,2-Dichloroethylene
ND
0.035
1,2-Dichloropropane
ND
0.035
cis- 1,3 -Dichloropropene
ND
0.035
trans- l,3-Dichloropropene
ND
0.035
1,2-Dichloro- 1, 1,2,2-tetrafluoroethane
ND
0.035
(Freon 114)
1,4-Dioxane
ND
0.35
Ethanol
ND
1.4
Ethyl Acetate
ND
0.035
Ethylbenzene
ND
0.035
4-Ethyltoluene
ND
0.035
Heptane
ND
0.035
Hexachlorobutadiene
ND
0.035
Hexane
ND
1.4
2-Hexanone (MBK)
ND
0.035
Isopropanol
ND
1.4
Methyl tert-Butyl Ether (MTBE)
ND
0.035
Methylene Chloride
ND
0.35
4-Methyl-2-pentanone (MIBK)
ND
0.035
Naphthalene
ND
0.035
Propene
ND
1.4
Styrene
ND
0.035
Page 17 of 33

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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 B226969 - TO-15 Prep
Blank (B226969-BLKI)
Prepared & Analyzed: 03/28/19
1,1,2,2-Tetrachloroethane
ND
0.035
Tetrachloroethylene
ND
0.035
Tetrahydrofuran
ND
0.035
Toluene
ND
0.035
1,2,4-Trichlorobenzene
ND
0.035
1, 1, 1 -Trichloroethane
ND
0.035
1,1,2-Trichloroethane
ND
0.035
Trichloroethylene
ND
0.035
Trichlorofluoromethane (Freon 11)
ND
0.14
1, 1,2-Trichloro- 1,2,2-trifluoroethane (Freon
ND
0.14
113)
1,2,4-Trimethylbenzene
ND
0.035
1,3,5-Trimethylbenzene
ND
0.035
Vinyl Acetate
ND
0.70
Vinyl Chloride
ND
0.035
m&p-Xylene
ND
0.070
o-Xylene
ND
0.035
Surrogate: 4-Bromofluorobenzene (1)
LCS (B226969-BS1)
8.40
8.00 105
Prepared & Analyzed: 03/28/19
70-130
Acetone
3.78
5.00
75.5
70-130
Benzene
3.68
5.00
73.7
70-130
Benzyl chloride
4.92
5.00
98.5
70-130
Bromodichloromethane
3.66
5.00
73.2
70-130
Bromoform
4.93
5.00
98.6
70-130
Bromomethane
5.32
5.00
106
70-130
1,3-Butadiene
5.27
5.00
105
70-130
2-Butanone (MEK)
3.76
5.00
75.3
70-130
Carbon Disulfide
5.71
5.00
114
70-130
Carbon Tetrachloride
3.77
5.00
75.4
70-130
Chlorobenzene
4.31
5.00
86.2
70-130
Chloroethane
5.33
5.00
107
70-130
Chloroform
4.79
5.00
95.9
70-130
Chloromethane
5.10
5.00
102
70-130
Cyclohexane
3.50
5.00
70.0
70-130
Dibromochloromethane
4.26
5.00
85.3
70-130
1,2-Dibromoethane (EDB)
4.06
5.00
81.1
70-130
1,2-Dichlorobenzene
4.64
5.00
92.8
70-130
1,3-Dichlorobenzene
4.92
5.00
98.3
70-130
1,4-Dichlorobenzene
4.82
5.00
96.3
70-130
Dichlorodifluoromethane (Freon 12)
5.63
5.00
113
70-130
1,1-Dichloroethane
4.57
5.00
91.3
70-130
1,2-Dichloroethane
4.41
5.00
88.3
70-130
1, 1 -Dichloroethylene
4.33
5.00
86.6
70-130
cis-1,2-Dichloroethylene
4.22
5.00
84.3
70-130
trans-1,2-Dichloroethylene
4.81
5.00
96.2
70-130
1,2-Dichloropropane
3.21
5.00
64.2
* 70-130 L-03
Page 18 of 33

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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 B226969 - TO-15 Prep
LCS (B226969-BS1)
Prepared & Analyzed: 03/28/19
cis-1,3-Dichloropropene
3.67
5.00
73.4
70-130
trans-1,3-Dichloropropene
3.82
5.00
76.4
70-130
1,2-Dichloro- 1, 1,2,2-tetrafluoroethane
5.34
5.00
107
70-130
(Freon 114)
1,4-Dioxane
4.29
5.00
85.8
70-130
Ethanol
5.11
5.00
102
70-130
Ethyl Acetate
3.74
5.00
74.9
70-130
Ethylbenzene
3.82
5.00
76.4
70-130
4-Ethyltoluene
4.21
5.00
84.2
70-130
Heptane
3.26
5.00
65.3 *
70-130
L-03
Hexachlorobutadiene
3.74
5.00
74.8
70-130
V-3E
Hexane
3.86
5.00
77.2
70-130
2-Hexanone (MBK)
3.24
5.00
64.9 *
70-130
L-03
Isopropanol
3.51
5.00
70.2
70-130
Methyl tert-Butyl Ether (MTBE)
4.48
5.00
89.6
70-130
Methylene Chloride
3.98
5.00
79.6
70-130
4-Methyl-2-pentanone (MIBK)
3.51
5.00
70.2
70-130
Naphthalene
4.22
5.00
84.4
70-130
Propene
4.48
5.00
89.5
70-130
Styrene
4.20
5.00
83.9
70-130
1,1,2,2-Tetrachloroethane
4.06
5.00
81.2
70-130
Tetrachloroethylene
4.40
5.00
88.0
70-130
Tetrahydrofuran
3.81
5.00
76.1
70-130
Toluene
3.87
5.00
77.5
70-130
1,2,4-Trichlorobenzene
4.10
5.00
81.9
70-130
1, 1, 1 -Trichloroethane
3.39
5.00
67.8 *
70-130
L-03
1,1,2-Trichloroethane
3.98
5.00
79.5
70-130
Trichloroethylene
3.76
5.00
75.1
70-130
Trichlorofluoromethane (Freon 11)
4.87
5.00
97.3
70-130
1, 1,2-Trichloro- 1,2,2-trifluoroethane (Freon
4.96
5.00
99.2
70-130
113)
1,2,4-Trimethylbenzene
4.14
5.00
82.9
70-130
1,3,5-Trimethylbenzene
4.12
5.00
82.3
70-130
Vinyl Acetate
5.90
5.00
118
70-130
Vinyl Chloride
5.24
5.00
105
70-130
m&p-Xylene
8.53
10.0
85.3
70-130
o-Xylene
4.06
5.00
81.1
70-130
Surrogate: 4-Bromofluorobenzene (1) 8.92 8.00 Ill 70-130
Page 19 of 33

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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
knalyte Results RL Results RL ppbv Result %REC Limits RPD Limit Flag/Qual
Batch B226969 - TO-15 Prep
Duplicate (B226969-DUPI)
Source: 19C1255-01
Prepared & Analyzed: 03/28/19
Acetone
6.3
8.0
15
19
6.5
3.24
25
J
Benzene
ND
0.20
ND
0.64
ND
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)
0.92
8.0
2.7
24
0.87
4.92
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
ND
0.20
ND
0.98
ND
25
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
0.17
0.20
1.0
1.2
0.16
4.88
25
J
1,4-Dichlorobenzene
ND
0.20
ND
1.2
ND
25
Dichlorodifluoromethane (Freon 12)
0.43
0.20
2.1
0.99
0.42
0.939
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
100
8.0
190
15
100
4.32
25
Ethyl Acetate
ND
0.20
ND
0.72
ND
25
Ethylbenzene
ND
0.20
ND
0.87
ND
25
4-Ethyltoluene
ND
0.20
ND
0.98
ND
25
Heptane
ND
0.20
ND
0.82
ND
25
Hexachlorobutadiene
ND
0.20
ND
2.1
ND
25
Hexane
ND
8.0
ND
28
ND
25
2-Hexanone (MBK)
ND
0.20
ND
0.82
ND
25
Isopropanol
1.2
8.0
2.9
20
1.2
1.66
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
Propene
ND
8.0
ND
14
ND
25
Styrene
ND
0.20
ND
0.85
ND
25
Page 20 of 33

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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 B226969 - TO-15 Prep
Duplicate (B226969-DUPI)
Source: 19C1255-01
Prepared & Analyzed: 03/28/19
1,1,2,2-Tetrachloroethane
ND
0.20
ND
1.4
ND
25
Tetrachloroethylene
0.12
0.20
0.84
1.4
0.13
6.25
25 J
Tetrahydrofuran
0.93
0.20
2.7
0.59
0.88
4.86
25
Toluene
0.47
0.20
1.8
0.75
0.44
7.08
25
1,2,4-Trichlorobenzene
ND
0.20
ND
1.5
ND
25
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)
0.83
0.80
4.7
4.5
0.86
3.79
25
1, 1,2-Trichloro- 1,2,2-trifluoroethane (Freon
ND
0.80
ND
6.1
ND
25
113)
1,2,4-Trimethylbenzene
ND
0.20
ND
0.98
ND
25
1,3,5-Trimethylbenzene
ND
0.20
ND
0.98
ND
25
Vinyl Acetate
ND
4.0
ND
14
ND
25
Vinyl Chloride
ND
0.20
ND
0.51
ND
25
m&p-Xylene
0.30
0.40
1.3
1.7
0.28
6.90
25 J
o-Xylene
0.14
0.20
0.61
0.87
0.14
2.90
25 J
Surrogate: 4-Bromofluorobenzene (1) 8.59 8.00 107 70-130
Page 21 of 33

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 * FAX [phone] " TEL. [phone]
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.
V-05 Continuing calibration verification (CCV) did not meet method specifications and was biased on the low side for
this compound.
V-36 Initial calibration verification (ICV) did not meet method specifications and was biased on the high side. Data
validation is not affected since sample result was "not detected" for this compound.
Page 22 of 33

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYST
STATION PDF Management Station
NIP Nicholas J. Pollard
KKM Kerry K. McGee
BRF Brittany R. Fisk
Page 23 of 33

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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 (S033211-ICV1) Lab File ID: F030617.D Analyzed: 03/06/19 20:40
Bromochloromethane (1)
200323
8.624
194605
8.624
103
60 - 140
0.0000
+/-0.50
1,4-Difluorobenzene(1)
600461
10.389
580681
10.389
103
60-140
0.0000
+/-0.50
Chlorobenzene-d5(1)
566414
14.756
545525
14.756
104
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 (S034081-CCV1) Lab File ID: F032804.D Analyzed: 03/28/19 11:04
Bromochloromethane (1)
176806
8.624
194605
8.624
91
60 - 140
0.0000
+/-0.50
1,4-Difluorobenzene (1)
666170
10.389
580681
10.389
115
60 - 140
0.0000
+/-0.50
Chlorobenzene-d5(1)
613238
14.752
545525
14.756
112
60-140
-0.0040
+/-0.50
LCS (B226969-BS1 ) Lab File ID: F032806.D Analyzed: 03/28/19 12:23
Bromochloromethane (1)
174171
8.624
176806
8.624
99
60 - 140
0.0000
+/-0.50
1,4-Difluorobenzene (1)
667259
10.389
666170
10.389
100
60 - 140
0.0000
+/-0.50
Chlorobenzene-d5(1)
615659
14.752
613238
14.752
100
60-140
0.0000
+/-0.50
Blank (B226969-BLK1) Lab File ID: F032808.D Analyzed: 03/28/19 13:45
Bromochloromethane (1)
165184
8.624
176806
8.624
93
60 - 140
0.0000
+/-0.50
1,4-Difluorobenzene(1)
621794
10.389
666170
10.389
93
60-140
0.0000
+/-0.50
Chlorobenzene-d5(1)
580426
14.752
613238
14.752
95
60-140
0.0000
+/-0.50
SG-1 (19C1255-01 ) Lab File ID: F0328IO.D Analyzed: 03/28/19 15:56
Bromochloromethane (1)
172014
8.624
176806
8.624
97
60 - 140
0.0000
+/-0.50
1,4-Difluorobenzene(1)
630940
10.386
666170
10.389
95
60-140
-0.0030
+/-0.50
Chlorobenzene-d5(1)
590785
14.752
613238
14.752
96
60-140
0.0000
+/-0.50
Duplicate (B226969-DUP1) Lab File ID: F032811.13 Analyzed: 03/28/19 16:36
Bromochloromethane (1)
163197
8.624
176806
8.624
92
60 - 140
0.0000
+/-0.50
1,4-Difluorobenzene(1)
615833
10.389
666170
10.389
92
60-140
0.0000
+/-0.50
Chlorobenzene-d5(1)
573463
14.752
613238
14.752
94
60-140
0.0000
+/-0.50
SG-2 (19C1255-02 ) Lab File ID: F032812.D Analyzed: 03/28/19 17:17
Bromochloromethane (1)
168456
8.624
176806
8.624
95
60 - 140
0.0000
+/-0.50
1,4-Difluorobenzene(1)
640651
10.386
666170
10.389
96
60-140
-0.0030
+/-0.50
Chlorobenzene-d5(1)
597450
14.752
613238
14.752
97
60-140
0.0000
+/-0.50
SG-2 DUP (19C1255-03) Lab File ID: F032813.D Analyzed: 03/28/19 17:58
Bromochloromethane (1)
163688
8.621
176806
8.624
93
60 - 140
-0.0030
+/-0.50
1,4-Difluorobenzene(1)
620159
10.389
666170
10.389
93
60-140
0.0000
+/-0.50
Chlorobenzene-d5(1)
582513
14.749
613238
14.752
95
60-140
-0.0030
+/-0.50
Page 24 of 33

icon-tes w .
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
SG-3 (19C1255-04) Lab File ID: F032814.1) Analyzed: 03/28/19 18:39
Bromochloromethane (1)
162740
8.621
176806
8.624
92
60 - 140
-0.0030
+/-0.50
1,4-Difluorobenzene(1)
618711
10.389
666170
10.389
93
60-140
0.0000
+/-0.50
Chlorobenzene-d5(1)
586700
14.749
613238
14.752
96
60-140
-0.0030
+/-0.50
SG4 (19C1255-05) Lab File ID: F032815.D Analyzed: 03/28/19 19:20
Bromochloromethane (1)
165810
8.624
176806
8.624
94
60 - 140
0.0000
+/-0.50
1,4-Difluorobenzene (1)
629542
10.386
666170
10.389
95
60 - 140
-0.0030
+/-0.50
Chlorobenzene-d5(1)
584103
14.752
613238
14.752
95
60-140
0.0000
+/-0.50
SG4 (19C1255-05RE1) Lab File ID: F032816.D Analyzed: 03/29/19 20:00
Bromochloromethane (1)
160878
8.624
176806
8.624
91
60 - 140
0.0000
+/-0.50
1,4-Difluorobenzene(1)
630817
10.389
666170
10.389
95
60-140
0.0000
+/-0.50
Chlorobenzene-d5(1)
582061
14.749
613238
14.752
95
60-140
-0.0030
+/-0.50
SG-5 (19C1255-06) Lab File ID: F032817.D Analyzed: 03/28/19 20:40
Bromochloromethane (1)
160791
8.624
176806
8.624
91
60 - 140
0.0000
+/-0.50
1,4-Difluorobenzene(1)
612852
10.386
666170
10.389
92
60-140
-0.0030
+/-0.50
Chlorobenzene-d5(1)
578785
14.752
613238
14.752
94
60-140
0.0000
+/-0.50
Page 25 of 33

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street' East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
CONTINUING CALIBRATION CHECK
EPA TO-15
S034081-CCV 1
COMPOUND
TYPE
CONC. (ppbv)
RESPONSE FACTOR
% DIFF / DRIFT
STD
CCV
ICAL
CCV
MIN (#)
CCV
LIMIT (#)
Acetone
A
5.00
4.05
1.114004
0.9028472
-19.0
30
Benzene
A
5.00
3.73
0.7760336
0.5794365
-25.3
30
Benzyl chloride
A
5.00
5.10
0.9001647
0.917313
1.9
30
Bromodichloromethane
A
5.00
3.82
0.5617128
0.4285897
-23.7
30
Bromoform
A
5.00
5.24
0.6118379
0.640944
4.8
30
Bromomethane
A
5.00
5.32
0.7311104
0.7779103
6.4
30
1,3-Butadiene
A
5.00
5.12
0.5680577
0.5812744
2.3
30
2-Butanone(MEK)
A
5.00
3.80
1.558376
1.182946
-24.1
30
Carbon Disulfide
A
5.00
5.01
1.799649
1.803016
0.2
30
Carbon Tetrachloride
A
5.00
3.95
0.5370126
0.423947
-21.1
30
Chlorobenzene
A
5.00
4.44
0.8198399
0.7280593
-11.2
30
Chloroethane
A
5.00
5.38
0.3385425
0.3640238
7.5
30
Chloroform
A
5.00
4.88
1.528583
1.493424
-2.3
30
Chloromethane
A
5.00
5.20
0.7996321
0.8315102
4.0
30
Cyclohexane
A
5.00
3.53
0.3408674
0.2403711
-29.5
30
Dibromochloromethane
A
5.00
4.44
0.6473741
0.5747302
-11.2
30
1,2-Dibromoethane(EDB)
A
5.00
4.18
0.5367602
0.4491855
-16.3
30
1,2-Dichlorobenzene
A
5.00
4.76
0.7912816
0.7538763
-4.7
30
1,3-Dichlorobenzene
A
5.00
5.08
0.8295511
0.8425518
1.6
30
1,4-Dichlorobenzene
A
5.00
4.93
0.8353047
0.8234167
-1.4
30
Dichlorodifluoromethane (Freon 12)
A
5.00
5.46
2.015798
2.203319
9.3
30
1,1-Dichloroethane
A
5.00
4.55
1.335898
1.216447
-8.9
30
1,2-Dichloroethane
A
5.00
4.55
0.934478
0.850677
-9.0
30
1,1-Dichloroethylene
A
5.00
4.35
1.159597
1.008156
-13.1
30
cis-1,2-Dichloroethylene
A
5.00
4.37
0.9788387
0.8553013
-12.6
30
trans-1,2-Dichloroethylene
A
5.00
4.40
0.9500568
0.8359988
-12.0
30
1,2-Dichloropropane
A
5.00
3.31
0.3080059
0.2037294
-33.9
30
cis- 1,3 -Dichloropropene
A
5.00
3.68
0.4419676
0.32489
-26.5
30
trans- l,3-Dichloropropene
A
5.00
3.79
0.3725371
0.2825993
-24.1
30
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 1
A
5.00
5.61
2.086514
2.340753
12.2
30
1,4-Dioxane
A
5.00
4.22
0.1501642
0.1267544
-15.6
30
Ethanol
A
5.00
5.37
0.1706891
0.1832607
7.4
30
Ethyl Acetate
A
5.00
4.97
0.2631796
0.261783
-0.5
30
Ethylbenzene
A
5.00
3.95
1.297819
1.025656
-21.0
30
4-Ethyltoluene
A
5.00
4.17
1.414081
1.178554
-16.7
30
Heptane
A
5.00
3.35
0.2451318
0.1641791
-33.0
30
Hexachlorobutadiene
A
5.00
4.16
0.5309972
0.4421644
-16.7
30
Hexane
A
5.00
3.83
0.9141655
0.6995419
-23.5
30
Page 26 of 33

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street' East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
CONTINUING CALIBRATION CHECK
EPA TO-15
S034081-CCV 1
COMPOUND
TYPE
CONC. (ppbv)
RESPONSE FACTOR
% DIFF / DRIFT
STD
CCV
ICAL
CCV
MIN (#)
CCV
LIMIT (#)
2-Hexanone (MBK)
A
5.00
3.39
0.5880728
0.3988376
-32.2
30
Isopropanol
A
5.00
3.76
1.275201
0.9598407
-24.7
30
Methyl tert-Butyl Ether (MTBE)
A
5.00
4.36
1.991866
1.737
-12.8
30
Methylene Chloride
A
5.00
3.93
0.8950267
0.7030893
-21.4
30
4-Methyl-2-pentanone (MI13K)
A
5.00
3.70
0.2222891
0.1646763
-25.9
30
Naphthalene
A
5.00
4.75
1.311609
1.245908
-5.0
30
Propene
A
5.00
4.48
0.9441131
0.8469305
-10.3
30
Styrene
A
5.00
4.29
0.7716466
0.6627587
-14.1
30
1,1,2,2-Tetrachloroethane
A
5.00
4.35
0.7374424
0.642105
-12.9
30
Tetrachloroethylene
A
5.00
4.53
0.5037019
0.4561883
-9.4
30
Tetrahydroforan
A
5.00
3.82
0.8178999
0.62492
-23.6
30
Toluene
A
5.00
3.87
1.011908
0.7830982
-22.6
30
1,2,4-Trichlorobenzene
A
5.00
4.95
0.6050774
0.599201
-1.0
30
1, 1, 1 -Trichloroethane
A
5.00
3.78
0.5100487
0.386102
-24.3
30
1,1,2-Trichloroethane
A
5.00
4.09
0.3473619
0.2838937
-18.3
30
Trichloroethylene
A
5.00
3.86
0.3570416
0.2756534
22.8
30
Trichlorofluoromethane(Freon 11)
A
5.00
4.80
1.730469
1.659953
-4.1
30
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 11
A
5.00
5.10
1.553059
1.583874
2.0
30
1,2,4-Trimethylbenzene
A
5.00
4.24
1.174477
0.9970732
-15.1
30
1,3,5-Trimethylbenzene
A
5.00
4.30
1.202725
1.035359
-13.9
30
Vinyl Acetate
A
5.00
3.41
1.245221
0.848668
-31.8
30
Vinyl Chloride
A
5.00
5.37
0.8165706
0.8765585
7.3
30
m&p-Xylene
A
1 10.0
8.73
1.005867
0.8784974
-12.7
30
o-Xylene
A
1 5.00
4.19
1.023364
0.8570271
-16.3
30
# Column to be used to flag Response Factor and %Diff/Drift values with an asterisk
* Values outside of QC limits
Page 27 of 33

icon-tes w .
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 28 of 33

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 - ISO17025:2005
100033
03/l/2020
MA
Massachusetts DEP
M-MA100
06/30/2019
CT
Connecticut Department of Publilc Health
PH-0567
09/30/2019
NY
New York State Department of Health
10899 NELAP
04/1/2019
NH-S
New Hampshire Environmental Lab
2516 NELAP
02/5/2020
RI
Rhode Island Department of Health
LA000112
12/30/2019
NC
North Carolina Div. of Water Quality
652
12/31/2019
NJ
New Jersey DEP
MA007 NELAP
06/30/2019
FL
Florida Department of Health
E871027 NELAP
06/30/2019
VT
Vermont Department of Health Lead Laboratory
LL015036
07/30/2019
ME
State of Maine
2011028
06/9/2019
VA
Commonwealth of Virginia
460217
12/14/2019
NH-P
New Hampshire Environmental Lab
2557 NELAP
09/6/2019
VT-DW
Vermont Department of Health Drinking
Water
VT-255716
06/12/2019
NC-DW
North Carolina Department of Health
25703
07/31/2019
Page 29 of 33

Address. 4012 Ridgebrook Bluffs Dr., Raleigh NC 27603
Phone: [phone]
ZMEMEWSmokey Hollow 2 (SH2) Site VI Sampling
Project Location: Raleigh, NC
Project Number:
1907.00
Project Manager: Kerry McGee I
Con -Test Bid:
Invoice Recip
Sampled By:
Order 9 1903080 BTO 03 08 19 110907
anY:
Rob Hill
Rob Hill
aeginairs
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SG-2 DUP
1556
BC 2350, FC 4186
C{
S&3
3/19/19
i
8C 2357, FC 4090 (* SEE NOTE 2)
1355
SG-4
3119119
.,
SC 2354, FC 4039
1849
SG-5
3119/19
BC 2416, FC 4303
1505
Page 1 of --I
—
# of Containers 6
2 Preservation Code
' Container Code S
1-Day ❑ 3-Day ❑
ANALYSIS
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W -"Ground Water
3119/19
A
H
X _
-
1818
•30
_g
,y�
`WW w
, Waste Water
DW 'Drinking Water
3/19l19
1632
A
H
X
NOTE 1:
All samples are sub -slab collected beneath '
as.5
5
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$ — SOiI/SOEid
slab foundations and asphalt. parking areas. '
Only low-level DROIGRO products expected .
S.2$� _:$lodge
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3/19119
A
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100x (1- to 2- mL) dilution screen suggested..
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7
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3119/19
1517
A
H
X
_28
-5
l - Iced
*NOTE 2; FOR 5AMPLr ;G-3, LAB PACKING LIST AND SHIPMENT BOX SHOWED FC 4390 15-MIN
li - HCL
FLOW CONTROLLER, BUT FC 4090 1-HR WAS DELIVERED/USED M = Methldnot
N - Nitric Acid
email results in,PDF and Excel EDD format with units in ug/m3 with NC IHS6 / Brownfields
NTIAL SOIL GAS kcreening levels included)
940y 10�7; 9
MOO ❑ 2L
- Received by: (signature)
uc
CD
W Relinquished by: (signature)
O
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W
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z 7(l5 171, z� SWSL
2/Time: IHSB (RESIDENTIAL
n MSCC
5 = :Sulfuric kid
1;
8 :sodium Bisulfate
X -:Sodium liydroxlde .:.:.
T = Sodium
Thiosulfate
0 = Other (Please
Please use the following codes to indicate possible sample concentration within
define)
the Conc Code column above:
H - High; M - Medium; L - Low; C - Clean; U - Unknown
' Container Codes:
A = Amber Glass
G = Glass
P =..Plastic
Program Information
Q. ,RSCA Q UST
Q 5WS landfill Q Trust Fund
ST = Sterile
V = Vial
Q IHSB Orphaned Landfill Q REC
$=:5uInlTla Canister
Q State Lead
T = Tedlar. Bag
Other: NC Brownfields Program
_Either (phase
define)
NELAC and AIHA-LAP, LLC Accredited
Date/Time: TURNAROUND TIME (BUSINESS DAYS) STARTS AT 9:00 AM THE DAY AFTER SAMPLE RECEIPT UNLESS THERE ARE
QUESTIONS ON THIS CHAIN. IF THIS FORM IS NOT FILLED OUT COMPLETELY OR IS INCORRECT, TURNAROUND TIME
Date/Time: CANNOT START UNTIL ALL QUESTIO' RVA !I ,;BEEN ANSWERED.
PLEASE BE CAREFUL NOT TO CONTAMINATE THIS DOCUMENT

3/25/2019 Track your package or shipment with FedEx Tracking
774.757093224`�
Delivered
Monday 3/25/2019 at 12:37 pm
FROM
Rafeigh, NC LS
Shipment Facts
DELIVERED
Signed for by: FFQUST
GET STATUS UPDATES
OBTAIN PROOF OF DELIVERY
TRACKING NUMBER
SERVICE
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WEIGHT
DIMENSIONS
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22xl9xl4 in
TERMS
PACKAGING
Shipper
Package
SHIP DATE ACTUAL DELIVERY
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Thu 3/21 /2019
Travel History
TO
East Longrnoadow, IAA US
REFERENCE
1907.00 SH2 VI Testing
TOTAL PIECES
1
STANDARD TRANSIT
3/25/2019
Monday, 3/25/2019
12:37 pm East Longmeadow, MA Defivered
4$2 am CHICOPEE, MA On FedEx vehicle for delivery
Saturday,3/23/2019
3:44 am CHICOPEE, MA On FedEx vehicle €Of delivery
3-35 am CHICOPEE, MA At local FedEx facility
https://www.fedex.comlapps/fedextrackl?action=track&tracknumbers=774757093224&locale=en_US&cntry_code=us
A ,
Local Scan Time \,/
Page 31 of 33

3/25/2019 Track your package or shipment with FedEx Tracking
rma,v , 3� tr.! to d s
9 58 pin kritDDLETCVV, CT Departed FedEx location
8 30 pin MIDDI-ElOWN, CT Arrived at FedEx location
4,35 pin PAWLING,10VVN OF, NY hr transit
4:35 am KERNERSVILLC, NC Departed FedEx location
12:57 am KERNERSVILLE NC Arrived at FedEx location
Thursday,3/21/2019
9AB pm DURHAM, NC Left FedEx origin facility
6:23 pm DURHAM, NC Arrived at FedEx location
5:00 pm DUNHAM, NC Picked up
Wednesday,3l2O/2019
6:30 pin RALEIGH, NC In FedEx possession
Scheduled or pi-"Aup r=exi day
5:35 pin Shipment informatfon sent to FedEx
https://www.fedex.comlappsffedextrackl?action=track&tracknumbers=774757093224&locale=en_US&cntry_code=us Page 32 of 33

Received By U Date
How were the samples �� In Cooler
received? In Box
Were samples within Temperature By Gun #
Compliance? 2-6°C IVIA By Blank #
Was Custody Seal Intact? /V
Was COC Relinquished ?
Are there any loose caps/valves on any samples?
Is COC in ink/ Legible? I
-� I -I ;- /I � Time 1 2-6
On Ice No Ice
Ambient Melted Ice
Actual i emp -
Actual Temp -
Were Samples Tampered with?
Does Chain Agree With Samples?
F
Zvz,�
f
MA COC I l d ll Client -r-- Analysis 'T' Sampler Name 1-
I ncu ea
Pertinent Information? Project !
Are Sample Labels filled out and legible?
Are there Rushes? F
Samples are received within holding time?
Proper Media Used? I
Are there Trip Blanks? E
ID's Collection DatesMmes T`
-r
Who was notified?
i`
Individually Certified Cans? I°=
Is there enough Volume? T -
Summa Cans ms,, A Nut/Ferrule; IC Train
Tedlar Baqs Tubing i
TO-17 Tubes T-Connector < ,
Radiello Syringe
Pufs[TO-11 s Tedlar
SCA�-Cle '- 5 CC,e\ t�-- L-/a5 1�-) 4 4 J �S z. 77 oAC©(-/ 2 37 recP,'vf
33 of 33

APPENDIX E
NCDEQ RISK CALCULATOR RESULTS
(RESIDENT SOIL GAS TO INDOOR AIR
PATHWAY FOR VAPOR INTRUSION)

Version Date: February 2018
Basis: November 2017 EPA RSL Table
Site ID:
Exposure Unit ID:
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
Co
Concentration
(ug/ms)
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
23
0.69
6.5E+03
2.1E-05
71-43-2
Benzene
3.2
0.096
3.6E-01
6.3E+00
2.7E-07
3.1E-03
75-71-8
Dichlorodifluoromethane
8.1
0.243
2.1E+01
2.3E-03
156-60-5
Dichloroeth lene, 1,2-trans-
0.48
0.0144
141-78-6
Ethyl Acetate
4.2
0.126
1.5E+01
1.7E-03
100-41-4
Eth lbenzene
4.4
0.132
1.1E+00
2.1E+02
1.2E-07
1.3E-04
109-99-9
-Tetrah drofuran
31
0.93
4.2E+02
4.5E-04
142-82-5
Heptane, N-
1.4
1 0.042
8.3E+01
1.0E-04
67-63-0
Iso ro anol
3
0.09
4.2E+01
4.3E-04
78-93-3
Methyl Ethyl Ketone (2-Butanone)
12
0.36
1.0E+03
6.9E-05
115-07-1
Propylene
7.9
0.237
6.3E+02
7.6E-05
127-18-4
Tetrachloroethylene
1.1
0.033
1.1E+01
8.3E+00
3.1E-09
7.9E-04
108-88-3
Toluene
19
0.57
1.0E+03
1.1E-04
75-69-4
Trichlorofluoromethane
3100
93
95-63-6
Trimeth lbenzene, 1,2,4-
8.9
0.267
1.3E+01
4.3E-03
108-67-8
Trimeth lbenzene, 1,3,5-
1.9
0.057
1.3E+01
9.1E-04
108-05-4
Vinyl Acetate
2.9
0.087
4.2E+01
4.2E-04
106-42-3
X lene,P-
19
0.57
2.1E+01
5.5E-03
108-38-3
X lene, m-
19
0.57
2.1E+01
5.5E-03
95-47-6
X lene, o-
7
0.21
2.1E+01
2.0E-03
Cumulative: I 3.9E-07 2.8E-02
North Carolina DEC Risk Calculator