22010_Glenwood Square_VIA_20201009

GTA ASSOCIATES, INC.
GEOTECHNICAL AND
ENVIRONMENTAL CONSULTANTS
A Practicing GBA Member Firm
October 9, 2020
NCDEQ Division of Waste Management
217 West Jones Street
Raleigh, North Carolina 27603
Attn: Mr. Kelly G. Johnson, P.G., Brownfields Project Manager
Re: Soil Vapor Sampling — Samples 7-9
Bloc 83, Phase 2
Raleigh, Wake County, North Carolina
Dear Mr. Johnson:
In accordance with our agreement dated June 1, 2020; Revised June 9, 2020 and the
Proposed Soil Vapor Sampling Work Plan ("Work Plan") dated January 24, 2020; revised June
10, 2020 and approved by the North Carolina Department of Environmental Quality (NCDEQ) on
June 16, 2020, GTA Associates, Inc. (GTA) has performed Soil Vapor Sampling of the above -
referenced site ("subject property"). The subject property is located south of Hillsborough Street
and North of West Hargett Street, to the west of South Boylan Avenue, within the city limits of
Raleigh, Wake County, North Carolina. The subject property is comprised of one parcel of land
addressed 701 Hillsborough Street, and contains one eight -story parking deck, currently under
construction. According to the Work Plan, GTA's sampling consists of sub -slab soil vapor
sampling and laboratory analysis to document the existing site conditions, and that no vapor
mitigation measures will be required/installed. The sample locations are shown on the attached
Sample Sketch (Figure 1).
1.0 Background
As discussed in the Work Plan, NCDEQ required sub -slab soil vapor samples be collected
after the buildings were constructed and slabs were poured but prior to occupancy to document
site conditions. Kelly Johnson's May 11, 2020 email (enclosed with this report for reference) also
discusses that the sub -slab soil vapor samples at Locations #1, #2, #3, #5, #7, #,8, and #9 may be
re -sampled after six months; however, the sample locations may be reduced based on sample
results.
GTA previously prepared Phase II Environmental Site Assessments (ESAs) for the six
parcels included in the Brownfields Agreement (BFA), and identified two USTs and seven
geophysical anomalies consistent with USTs. Ten USTs were removed from the site in September
and October 2019. The UST Closure Report has been submitted to NCDEQ under separate cover.
The Phase II ESAs identified naphthalene in soil at concentrations above the NCDEQ Preliminary
5605 Chapel Hill Road, Suite 112, Raleigh, NC 27607 [phone]
t Abingdon, MD t Baltimore, MD ♦ Laurel, MD ♦ Frederick, MD t Waldorf, MD t Sterling, VA ♦ Malvern, OH
t Somerset, NJ ♦ NYC Metro t New Castle, DE ♦ Georgetown, DE t York, PA ♦ Quakertown, PA ♦ Charlotte, NC t Raleigh, NC
Visit us on the web at www.gtaeug.com

NCDEQ Division of Waste Management
Re: Bloc 83, Phase 2 — Soil Vapor Sampling — Samples 7-9
October 9, 2020
Page 2 of 4
Soil Remediation Goals (PSRGs) and in groundwater above the 02L groundwater standards. None
of the soil vapor samples contained concentrations above the Commercial Soil Vapor Intrusion
Screening Levels (CSVISLs); however, tetrachloroethylene (PCE) was detected in three samples
at concentrations up to 87 micrograms per cubic meter (µg/m3), below the CSVISL of 3,500 µg/m3,
and trichloroethene (TCE) was detected in three samples at concentrations up to 20 µg/m3, below
the CSVISL of 180 ug.m3.
2.0 Sampling Activities
On September 16, 2020, GTA personnel collected four (4) sub -slab soil vapor samples
(GTA-VS-7 through GTA-VS-9) from within the building on the subject property. One sample
was collected in the southern stairwell, two in the trash room, and one in the northern stairwell,
(see Figure 1). Please note the remaining samples (at locations #10 through #12) located in the
parking deck's residential spaces will be performed at a later date. The sub -slab soil vapor samples
were collected using a VaporPin® and installed using the following methodology:
• Drilled a 5/8-inch diameter hole through the concrete slab to approximately 12
inches below the top of the floor slab in a flush mount configuration; and
• Installed a patented VaporPin® sampling probe into the 5/8-inch diameter hole,
which, by use of a compressed silicone sleeve, provides an air -tight seal through
the existing concrete slab.
The VaporPin® was connected to a fully enclosed shroud, which encloses the sample point
and entire sample train. The sample train consisted of laboratory-cleaned'/4-inch NylaFlow tubing
from the sample pin connected to a laboratory -cleaned three-way valve, then to a flow
controller/regulator set for a 4-hour sample period, and then to a 1-liter laboratory -cleaned Summa
canister. The shroud was filled with helium (He) to a concentration of at least 65% He, and
monitored using a helium flow -through meter and hand pump. Once the shroud was filled with
He, the sample train was purged using a hand pump through a three-way valve installed in the
sample train. The sample train was purged for at least five minutes and the He content of the
purged air was continuously monitored using the He meter. Once the leak test was complete, the
three-way valve was turned to allow the soil vapor sample to enter the Summa canister, starting
the sample period. The He concentration inside the shroud was recorded at the start and end of
the purging activities for each sample point. New dedicated tubing and fittings were used for each
sample point. A duplicate sample (GTA-VS-8B) was collected during the sampling event, using
a t-splitter, as requested by NCDEQ.
Once the leak tests were complete, the three-way valve was turned to allow the soil vapor
sample to enter the Summa canister, starting the sample period. The sampling was considered
complete when the canister vacuum dropped to less than 10 inches mercury (10" Hg) vacuum but
not to 0" Hg. In sample GTA-VS-9, the canister vacuum dropped to 0" Hg before the 4-hour
sample period ended; however, the canister and flow controller information in the laboratory report
shows that in -flow rate of GTA-VS-9 was higher than the other three samples, which may have
been due to a flow controller issue.

NCDEQ Division of Waste Management
Re: Bloc 83, Phase 2 — Soil Vapor Sampling — Samples 7-9
October 9, 2020
Page 3 of 4
At the conclusion of the sampling period, the canisters were sealed, removed, and
submitted under Chain -of -Custody protocol to the Alpha Analytical laboratory for analysis of
VOCs by United States Environmental Protection Agency Method TO-15. A copy of the
laboratory report, which includes the Chain of Custody document is included.
3.0 Analysis Results
The analysis results are summarized in the attached Table 1 (Soil Vapor Analysis
Summary). The table provides comparisons to the CSVISLs for Sub -Slab and Exterior Soil Gas
that are based on the NCDEQ's February 2018 Non -Residential Vapor Intrusion Screening Level
sheet. According to the sheet, soil vapor concentrations that:
"do NOT EXCEED the Sub -Slab and Exterior Soil Gas Screening Levels (SGSLs) (or
calculated risk), typically no further investigation is necessary and the vapor intrusion (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. Additionally, soil gas samples are expected to be highly
variable spatially and temporally and the SGSLs assume exposure to a conservative concentration
over long periods of time."
"If exterior soil gas results EXCEED the SGSLs (or calculated risk), based on the soil gas
results and professional judgement, a determination may be made that implementing an interim or
permanent mitigation measure may be the most cost-effective and proactive approach prior to
proceeding with further sampling."
NCDEQ's target soil vapor values were derived from USEPA Regional Screening Levels
dated November 2017.
Several VOCs (including PCE and cyclohexane) were detected above the laboratory
reporting limits, but the detections were below the NCDEQ CSVISLs.
4.0 Conclusions
Based on the sampling and analysis results described herein, it appears that the
concentrations detected by the current round of Soil Vapor Sampling do not indicate the need for
remedial measures prior to occupancy. Based on these results, it also appears that future sampling
of Locations 7-9 is not necessary, as described in the Work Plan and forecasted in Kelly Johnson's
May 11, 2020 email (enclosed with this report for reference).
5.0 Limitations
GTA's conclusions regarding this site have been based on observations of existing
conditions and an interpretation of site history and site usage data, professional experience in the
area with similar projects, and generally accepted professional environmental practice under
similar circumstances. The conclusions reached regarding the conditions of this site do not
represent a warranty that all areas within the site are of a similar quality as may be inferred from
observable site conditions, available site history, samples, analysis results, etc. Site conditions
were inferred from the observations, field screening, and laboratory analysis of samples obtained

NCDEQ Division of Waste Management
Re: Bloc 83, Phase 2 — Soil Vapor Sampling — Samples 7-9
October 9, 2020
Page 4 of 4
at specific locations and on specific dates. These conditions may not remain consistent through
the passage of time. Please be advised that no environmental site assessment can wholly eliminate
uncertainty regarding the potential for environmental liability in connection with the property.
GTA's evaluation and analysis are intended to reduce, but not eliminate, the potential for
conditions that result in liability for the Client.
GTA appreciates the opportunity to be of assistance to you on this project, and we look
forward to working with you on future assignments.
Sincerely,
GTA ASSOCIATES, INC.
p"il"i Digitally Signed
Evan M. Hamo i%A CA 09-2020
Staff Scientist , �mq
�hry
W. Shawn Sullivan,
Associate
EMH/SC/PHH
cc: Mr. Ryan Blair / Glenwood Two, LLC
Attachments:
Figure 1 — Soil Vapor Sampling Plan (11 "xl7", color)
Table 1 — Soil Vapor Analysis Summary (11 ''x17 ", color)
Email 1— NCDEQ Email from Kelly Johnson (3 pages)
Laboratory Report (47 pages)
T:\Projects\2020 Projects\35200786 - Bloc 83 Soil Vapor Sampling\Doc\Report for Second Round of testing\ENV 35200786 Vapor Sampling
Summary Letter R2.docx

a o— Z
a
o J
Xco
�°
NN O � zaQ
Z
LO- E
a) � pJO-0aCl)
2a d c a c-7
c m o 0c) r
�� N U H a m
0Cc 0o y
mo J
a5 a -o CO z
N O 0
c
Al.m�IL Cc) IL
O N Q N
Z � J m
0
�
�1�g'r c� I� +_ y o
1� s !
i
cn
OVmyo�
H W > p e M N
f I!■ y a �_ i I
4omo
JO o 0
1 f nn k I --•---
2K�-� N
ZCag F
=• o
N
F1 55
Y I� II __ ___ __ � a � _ �� J III � W s
'n a Ouj
� o
n 2C,
II
ci
� � � D IIIIIII
I a>'-' - --- �OQ Ll� a
I +1 p O it -- -- h I
r
dD
LUfI J_r,' r ' I rfli
C � n
N_
Ir ry
f I I 00 N
� C
LJ
1
Ir C IL y
CL
._IL
� � � 133ll15 Ayy0Np735 •� ! � -•
i�� H Y �¢ FmN�l7ar �rnn3tevrlrvt}— p y - 4 ?� z y
,p U
s
U --_ ... •� �. - - -- tea•!- tAJ ✓Z co
Im.2m
46 ca c ri
Mo
i 4_ R s sae 0 Z 1—
r - -. (30
I I I !• r a ry F Lu rC Z a
p s p op 0 n
+ I y a Q H m
I Co a ifd[R 0 a U `n
LU
r1
LU
1 r i 1 rj •• •. _- - - .mesa . a 4 m 0 Q
E
I U) ' 4 1 © o
I

Table 1 Bloc 83 Vapor Sampling
Soil Vapor Analysis Summary wake County, North Carolina
GTA Project No. 35200786
Page 1 ojI
Sample Identification
Commercial Comparison Values
GTA-VS-7
G7A-VS-BA
GTA-VS-BB
GTA-VS-9
Sub -Slab and Exterior Soil Gas Screening Level
Volatile Organic Compounds (VOCs)
1,1,1-Trichloroethane
--
-
--
--
--
--
--
--
--
440,000
210
18
1,1,2,2-Tetrachloroethane
1,1,2-Trichloroethane
-
--
--
1,1,2-Trichloro-1,2,2-Trifluoroethane (Freon 113)
--
--
--
--
440,000
1,1-Dichloroethane
--
--
--
--
7,700
1,1-Dichloroethene
--
--
--
-
18,000
1,2,4-Trichlorobenzene
--
--
--
--
180
1,2,4-Trimethylbenzene
28.4
3.81
3.78
5.70
5,300
1,2-Dibromoethane (EDB)
--
--
--
--
20
1,2-Dichlorobenzene
--
--
--
--
18,000
1,2-Dichloroethane
--
-
--
-
470
1,2-Dichloropropane
--
-
--
-
350
1,2-Dichlorotetrafluoroethane (Freon 114)
--
-
--
--
NE
1,3,5-Trimethylbenzene
41.7
-
--
-
5,300
1,3-Butadiene
--
-
--
--
180
1,3-Dichlorobenzene
--
-
--
-
NE
1,4-Dichlorobenzene
--
-
--
-
1,100
1,4-Dioxane (P-Dioxane)
--
-
--
-
2,500
2,2,4-Trimethylpentane
--
-
--
-
NE
2-Butanone (Methyl Ethyl Ketone)
26
6.78
6.78
5.90
440,000
2-Hexanone (Methyl Butyl Ketone)
--
-
--
--
26
4-Ethyltoluene
8.8
-
--
--
NE
4-Methyl-2-Pentanone (Methyl Isobutyl Ketone)
-
--
--
--
260,000
Acetone
174
52.7
52.0
52.0
2,700,000
Allyl Chloride (3-Chloropropene)
--
--
--
--
88
Benzene
--
--
--
--
1,600
Benzyl Chloride
--
--
--
--
88
Bromodichloromethane
--
--
--
--
330
Bromoethene (Vinyl Bromide)
--
--
--
--
260
Bromoform
--
--
--
--
1,100
Bromomethane
--
--
--
-
440
Carbon Disulfide
--
2.02
1.81
1.57
61,000
Carbon Tetrachloride
--
--
--
--
2,000
Chlorobenzene
--
-
--
-
4,400
Chloroethane (Ethyl Chloride)
--
-
--
-
880,000
Chloroform
--
3.90
4.18
-
530
Chloromethane
--
-
--
1.09
7,900
Cyclohexane
523
--
--
14.1
530,000
Dibromochloromethane
--
-
--
-
NE
Dichlorodifluoromethane (Freon 12)
--
-
2.53
2.37
NE
Ethyl Acetate
--
-
--
--
6,100
Ethylbenzene
28.7
3.37
3.16
4.95
4,900
Hexachlorobutadiene
--
-
--
--
560
Isopropylbenzene (Cumene)
--
--
--
--
35,000
Methyl-t-butyl ether
--
-
--
--
47,000
Methylene Chloride
-
--
--
--
53,000
Naphthalene
-
--
--
--
260
Propylene
3.94
3.37
--
--
260,D00
Styrene
--
--
--
--
88,000
Tetrachloroethene (PCE)
--
16.3
15.4
--
3,500
Tetrahydrofuran
7.11
--
4.48
19.9
180,000
Toluene
101
12.6
12.2
16.8
440,000
Trichloroethene (TCE)
--
--
--
-
180
Trichlorofluoromethane (Freon 11)
--
--
3.19
-
NE
Vinyl Acetate
--
--
--
--
18,000
Vinyl Chloride
--
-
--
-
2,800
cis-1,2-Dichloroethene
--
--
--
--
NE
cis-1,3-Dichloropropene lu
-
--
--
--
1,800
m,p-Xylenes
247
15.3
14.0
21.8
8,800
n-Heptane
72.5
--
--
--
35,000
n-Hexane
10.5
--
--
--
61,000
n-Propylbenzene
-
--
--
--
88,000
o-Xylene
90.8
5.21
4.86
8.34
8,800
trans-1,2-Dichloroethene
--
--
--
--
NE
trans-1,3-Dichloropropene ltl
-
--
--
--
1,800
Ethyl Alchohol
139
62.2
58.6
128
NE
Vinyl Bromide
-
--
--
--
260
Isopropyl Alchohol
7.60
6.54
6.19
8.06
NE
1, 2-dichloroethene
-
--
--
--
NE
1, 2-dibromomethane
350
Notes:
This table is only to be used in conjunction with the report for which it was prepared. See the report text for background information, assumptions, limitati
Samples collected on September 16, 2020
Results expressed in micrograms per cubic meter (Wm')
RSL= Regional Screening Level, from USEPA November 2017
Comparison values obtained from NCDEQ February 2018 non-residential vapor intrusion screening level sheet
Adjusted RSL uses CR = 30 s rather than 30 z
CR = cancer risk (increase in cancer risk due to exposure to chemical of potential concern)
Non -carcinogens are expressed with hazard index (HI) =1.0
NE = RSL not established
(1)= The Adjusted RSLs in this table for these chemicals are for total 1,3-Dichloropropene. The cis -and trans- components are not included in the USEPA RSL table.
-- =Not Detected

Hamo, Evan
From: Johnson, Kelly G <[e-mail]>
Sent: Monday, May 11, 2020 3:28 PM
To: Ryan Blair
Cc: Stukes, Mary Katherine H.; Hayden, Paul
Subject: RE: [External] Bloc83 - Vapor Testing Exhibit
Attachments: Bloc83_VaporTestingExhibit_DEQ Comments sent to PD.PDF
***Caution: External email***
Ryan — Attached is my mark up of the drawing with three additional requested sub -slab soil gas locations for the future
retail space on the western parcel. I agree and have no comments on the proposed layout of your other proposed points
(#1 through #9) — they are exactly where I was thinking. I have marked the map with numbered circles (red fill and green
outlines) to make the items below easier to discuss:
For the two points where the decorative slab topping will go (#4 an #6):
o I'm hoping that there will be a perfect time to get the sub -slab soil gas samples from the decorative slab
topping area at the same time that you get the sub -slab soil gas samples for the western parcel —
stairwells (#7 and #9) and trash/sprinkler room (#8) so you don't have to pay your consultant for two
mobilizations.
o Points #4 and #6 in the decorative slab will be temporary and abandoned after sample collection so you
can put down the decorative slab topping with no visibility issues.
• The main item of the attached PDF is the three sub -slab soil gas locations on the western parcel in the future
retail suite next to the former USTs (#10, #11, and #12).
0 1 think that this is a good compromise — since that is the suite closest to the former USTs and most likely
unit to have VI issues that we don't capture or know about from the main sub -slab sampling event of
samples #1 through #9.
o These samples will need to be collected once the tenant moves in and finishes their upfits but before
they occupy the unit. I recognize that this might be difficult because some tenants move in quite quickly
and items like this can slip through the cracks — but I'm hopeful that singling out just this one unit will
make things simpler.
o Let me know your thoughts.
In general, I think in six months we can revisit up to sample points #1, #2, #3, #5, #7, #8, and #9 (up to seven
total samples). Note that this would be the maximum number of samples in six months and depending on the
data from this we may be able to trim that back to 3-4 samples.
o Additionally, you would sample the three sub -slab soil gas points in the future retail suite (#10, #11, and
#12) after the slab is poured and before the tenant moves in. For revisiting the future retail suite with
points #10, #11, and #12 — this will depend highly on the concentrations found and I envision two
primary (with exception of the worst -case) scenarios happening: 1) the concentrations are very similar
to the data collected for points #7, #8, and #9 and I think a case could be made that no further sampling
would be needed; or 2) the data is different than seen for other nearby points and another event in 6
months would be necessary.
Regarding drafting of the Brownfields Agreement for your review: You'll be pleased to know that we've started the
drafting process, it is still difficult to give you an estimate when it will complete the drafting process and our internal
reviews, but as discussed on our phone call a few weeks ago, barring any unforeseen issues, there should be no issues
with finalizing and recording this agreement before the years end (hopefully sooner).

Thanks and let me know if you have any questions or concerns,
-Kelly
�n
Mr. Kelly G. Johnson, P.G.
Brownfields Project Manager
NC Department of Environmental Quality
Division of Waste Management
919.707.8279 (Office)
919.270.9085 (Personal Mobile) Note this is only for
use during COVID-19 while I telework 8AM-5PM. Do
not text message this number.
Kelly.Johnsonkncdenn gov
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Ryan Blair [mailto:[e-mail]]
Sent: Monday, April 13, 2020 1:05 PM
To: Johnson, Kelly G <[e-mail]>
Cc: [e-mail]; Hayden, Paul <[e-mail]>
Subject: [External] BIoc83 -Vapor Testing Exhibit
CAUTION:I email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
nc. ov
Kelly,
I hope you had a good holiday weekend. As a follow-up to our conversation last week, please find the attached Vapor
Testing exhibit for the BIoc83 project. We have included some suggested vapor sampling locations, and would
recommend that we perform 6 month post completion sampling at select locations only if additional levels of PCE or TCE
are hit during the pre -completion sampling.
I look forward to hearing your feedback. I also attached a blank copy for you to mark up if desired.
Sincerely,
Ryan Blair
Vice President I Development & Acquisitions
Direct: [phone]
Cell: [phone]
[e-mail]
HERITAGE
PROPERTIES, IN
Heritage Properties, Inc.
501 Fairmount Avenue, Suite 101 1Towson, MD 21286
www.HeritagePropertieslnc.com [heritagepropertiesinc.coml

Serial No:09242016:00
HA
AN-ALYT1 CA L
ANALYTICAL REPORT
Lab Number: L2039161
Client:
Geo-Technology Associates, Inc.
5605 Chapel Hill Rd.
Raleigh, NC 27607
ATTN:
Shiehan Chou
Phone:
[phone]
Project Name:
BLOC 83 GARAGE
Project Number:
35200786
Report Date:
09/24/20
The original project report/data package is held by Alpha Analytical. This report/data package is paginated and should be reproduced only in its
entirety. Alpha Analytical holds no responsibility for results and/or data that are not consistent with the original.
Certifications & Approvals: MA (M-MA030), NH NELAP (2062), CT (PH-0141), DoD (L2474), FL (E87814), IL (200081), LA (85084),
ME (MA00030), MD (350), NJ (MA015), NY (11627), NC (685), OH (CL106), PA (68-02089), RI (LA000299), TX (T104704419), VT (VT-0015),
VA (460194), WA (C954), US Army Corps of Engineers, USDA (Permit #P330-17-00150), USFWS (Permit #206964).
320 Forbes Boulevard, Mansfield, MA 02048-1806
508-822-9300 (Fax) 508-822-3288 800-624-9220 - www.alphalab.com
LILPHA
Page 1 of 47

0)
r
CD
O
O
O
O
O
;
m
M
\
M
00
00
M
O
J
O
O
o
o
o
L
LO
0
0
T
.Q
R
E
LO
It
It
_
0 E
r
O
O
-
O
O
Z0
t H
N
N
N
N
d
(0
(D
C.0
J
O c�4
rn
rn
rn
rn
U�
o
0
0
0
U
U
U
U
Z
Z
Z
Z
=
:
2
2
W
W
W
W
J
J
J
J
Q
Q
Q
Q
O
O
O
O
0�
Of
Of
ry
N C
m
m
in
m
J
J
J
J
W'
W'
ly-
w
O
O
O
O
d
d
d
W
Q
Q
Q
Q
>I
>I
>I
>I
K
W
C�
Q
ry
Q
C.�
M
m
M
00
ti
M
M
O
o
o
>
>
>
>
m
H
H
m
U
CD
CD
CD
C7
d
E
E
m
m
a-
N
M
It
Z
Z
O
O
O
O
C1
G)
C1
G1
N
(D
co
CO
CO
O
O
O
10 Q
rn
rn
rn
rn
N
a
a._QE
o
0
0
0
0�
Q fn
J
J
J
J
d

Serial No:09242016:00
Project Name: BLOC 83 GARAGE Lab Number: L2039161
Project Number: 35200786 Report Date: 09/24/20
Case Narrative
The samples were received in accordance with the Chain of Custody and no significant deviations were encountered during the preparation
or analysis unless otherwise noted. Sample Receipt, Container Information, and the Chain of Custody are located at the back of the report.
Results contained within this report relate only to the samples submitted under this Alpha Lab Number and meet NELAP requirements for all
NELAP accredited parameters unless otherwise noted in the following narrative. The data presented in this report is organized by parameter
(i.e. VOC, SVOC, etc.). Sample specific Quality Control data (i.e. Surrogate Spike Recovery) is reported at the end of the target analyte list
for each individual sample, followed by the Laboratory Batch Quality Control at the end of each parameter. Tentatively Identified
Compounds (TICs), if requested, are reported for compounds identified to be present and are not part of the method/program Target
Compound List, even if only a subset of the TCL are being reported. If a sample was re -analyzed or re -extracted due to a required quality
control corrective action and if both sets of data are reported, the Laboratory ID of the re -analysis or re -extraction is designated with an "R"
or "RE", respectively.
When multiple Batch Quality Control elements are reported (e.g. more than one LCS), the associated samples for each element are noted in
the grey shaded header line of each data table. Any Laboratory Batch, Sample Specific % recovery or RPD value that is outside the listed
Acceptance Criteria is bolded in the report. In reference to questions H (CAM) or 4 (RCP) when "NO" is checked, the performance criteria
for CAM and RCP methods allow for some quality control failures to occur and still be within method compliance. In these instances, the
specific failure is not narrated but noted in the associated QC Outlier Summary Report, located directly after the Case Narrative. QC
information is also incorporated in the Data Usability Assessment table (Format 11) of our Data Merger tool, where it can be reviewed in
conjunction with the sample result, associated regulatory criteria and any associated data usability implications.
Soil/sediments, solids and tissues are reported on a dry weight basis unless otherwise noted. Definitions of all data qualifiers and acronyms
used in this report are provided in the Glossary located at the back of the report.
HOLD POLICY - For samples submitted on hold, Alpha's policy is to hold samples (with the exception of Air canisters) free of charge for 21
calendar days from the date the project is completed. After 21 calendar days, we will dispose of all samples submitted including those put
on hold unless you have contacted your Alpha Project Manager and made arrangements for Alpha to continue to hold the samples. Air
canisters will be disposed after 3 business days from the date the project is completed.
Please contact Project Management at 800-624-9220 with any questions.
LILPHA
Page 3 of 47 • • 11-

Project Name: BLOC 83 GARAGE
Project Number: 35200786
Serial No:09242016:00
Lab Number: L2039161
Report Date: 09/24/20
Case Narrative (continued)
Volatile Organics in Air
Canisters were released from the laboratory on September 14, 2020. The canister certification results are
provided as an addendum.
L2039161-01 through -04: Prior to sample analysis, the canisters were pressurized with UHP Nitrogen due to
canister size. The pressurization resulted in a dilution of the samples. The reporting limits have been elevated
accordingly.
The WG1413688-3 LCS recovery for benzyl chloride (141 %) is above the upper 130% acceptance limit. All
samples associated with this LCS do not have reportable amounts of this analyte
I, the undersigned, attest under the pains and penalties of perjury that, to the best of my knowledge and
belief and based upon my personal inquiry of those responsible for providing the information contained
in this analytical report, such information is accurate and complete. This certificate of analysis is not
complete unless this page accompanies any and all pages of this report.
q�,�„ Christopherj. Anderson
Authorized Signature:
Title: Technical Director/Representative
Date: 09/24/20
Page 4 of 47
LILPtiA

Serial No:09242016:00
AIR
Ak�KA
Page 5 of 47

Project Name: BLOC 83 GARAGE
Project Number: 35200786
SAMPLE RESULTS
Lab ID:
L2039161-01 D
Client ID:
GTA VS-7
Sample Location:
HILLSBOROUGH ST. RALEIGH, NC
Sample Depth:
Matrix:
Soil _Vapor
Anaytical Method:
48,TO-15
Analytical Date:
09/24/20 02:46
Analyst:
TS
ppbV
Parameter
Results RL
Volatile Organics in Air - Mansfield Lab
Propylene
2.29
Dichlorodifluoromethane
ND
Chloromethane
ND
1,2-Dichloro-1,1,2,2-tetrafluoroethane
ND
Vinyl chloride
ND
1,3-Butadiene
ND
Bromomethane
ND
Chloroethane
ND
Ethyl Alcohol
73.6
Vinyl bromide
ND
Acetone
73.1
Trichlorofluoromethane
ND
iso-Propyl Alcohol
3.09
1,1-Dichloroethene
ND
Methylene chloride
ND
3-Chloropropene
ND
Carbon disulfide
ND
1,1,2-Trichloro-1,2,2-Trifluoroethane
ND
trans-1,2-Dichloroethene
ND
1,1-Dichloroethane
ND
Methyl tert butyl ether
ND
Vinyl acetate
ND
2-Butanone
8.80
Serial No:09242016:00
Lab Number: L2039161
Report Date: 09/24/20
Date Collected: 09/16/20 15:15
Date Received: 09/18/20
Field Prep: Not Specified
ug/m3 Dilution
MDL Results RL MDL Qualifier Factor
1.37
3.94
2.36
2.748
0.550
ND
2.72
2.748
0.550
ND
1.14
2.748
0.550
ND
3.84
2.748
0.550
ND
1.41
2.748
0.550
ND
1.22
2.748
0.550
ND
2.14
2.748
0.550
ND
1.45
2.748
13.7
139
25.8
2.748
0.550
ND
2.40
2.748
2.75
174
6.53
2.748
0.550
ND
3.09
2.748
1.37
7.60
3.37
2.748
0.550
ND
2.18
2.748
1.37
ND
4.76
2.748
0.550
ND
1.72
2.748
0.550
ND
1.71
2.748
0.550
ND
4.22
2.748
0.550
ND
2.18
2.748
0.550
ND
2.23
2.748
0.550
ND
1.98
2.748
2.75
ND
9.68
2.748
1.37
26.0
4.04
2.748
L\LPHA
Page 6 of 47

Project Name: BLOC 83 GARAGE
Project Number: 35200786
SAMPLE RESULTS
Lab ID: L2039161-01 D
Client ID: GTA VS-7
Sample Location: HILLSBOROUGH ST. RALEIGH, NC
Sample Depth:
ppbV
Parameter Results RL
Volatile Organics in Air - Mansfield Lab
cis-1,2-Dichloroethene
ND
Ethyl Acetate
ND
Chloroform
ND
Tetrahydrofuran
2.41
1,2-Dichloroethane
ND
n-Hexane
2.99
1,1,1-Trichloroethane
ND
Benzene
ND
Carbon tetrachloride
ND
Cyclohexane
152
1,2-Dichloropropene
ND
Xylene (Total)
77.8
Bromodichloromethane
ND
1,4-Dioxane
ND
Trichloroethene
ND
2,2,4-Trimethylpentane
ND
Heptane
17.7
cis-1,3-Dichloropropene
ND
4-Methyl-2-pentanone
ND
trans- 1,3-Dichloropropene
ND
1,1,2-Trichloroethane
ND
1,2-Dichloroethene (total)
ND
Toluene
26.8
2-Hexanone
ND
1,3-Dichloropropene, Total
ND
Dibromochloromethane
ND
MDL Results
Serial No:09242016:00
Lab Number: L2039161
Report Date: 09/24/20
Date Collected: 09/16/20 15:15
Date Received: 09/18/20
Field Prep: Not Specified
ug/m3 Dilution
RL MDL Qualifier Factor
0.550
ND
2.18
2.748
1.37
ND
4.94
2.748
0.550
ND
2.69
2.748
1.37
7.11
4.04
2.748
0.550
ND
2.23
2.748
0.550
10.5
1.94
2.748
0.550
ND
3.00
2.748
0.550
ND
1.76
2.748
0.550
ND
3.46
2.748
0.550
523
1.89
2.748
0.550
ND
2.54
2.748
0.550
338
2.39
2.748
0.550
ND
3.68
2.748
0.550
ND
1.98
2.748
0.550
ND
2.96
2.748
0.550
ND
2.57
2.748
0.550
72.5
2.25
2.748
0.550
ND
2.50
2.748
1.37
ND
5.61
2.748
0.550
ND
2.50
2.748
0.550
ND
3.00
2.748
0.550
ND
2.18
2.748
0.550
101
2.07
2.748
0.550
ND
2.25
2.748
0.550
ND
2.50
2.748
0.550
ND
4.69
2.748
LILPHA
Page 7 of 47

Project Name: BLOC 83 GARAGE
Project Number: 35200786
SAMPLE RESULTS
Lab ID: L2039161-01 D
Client ID: GTA VS-7
Sample Location: HILLSBOROUGH ST. RALEIGH, NC
Sample Depth:
ppbV
Parameter Results RL
Serial No:09242016:00
Lab Number: L2039161
Report Date: 09/24/20
Date Collected: 09/16/20 15:15
Date Received: 09/18/20
Field Prep: Not Specified
ug/m3 Dilution
MDL Results RL MDL Qualifier Factor
Volatile Organics in Air - Mansfield Lab
1,2-Dibromoethane
ND
0.550
ND
4.23
2.748
Tetrachloroethene
ND
0.550
ND
3.73
2.748
Chlorobenzene
ND
0.550
ND
2.53
2.748
Ethylbenzene
6.60
0.550
28.7
2.39
2.748
p/m-Xylene
56.9
1.10
247
4.78
2.748
Bromoform
ND
0.550
ND
5.69
2.748
Styrene
ND
0.550
ND
2.34
2.748
1,1,2,2-Tetrachloroethane
ND
0.550
ND
3.78
2.748
o-Xylene
20.9
0.550
90.8
2.39
2.748
4-Ethyltoluene
1.79
0.550
8.80
2.70
2.748
1,3,5-Trimethylbenzene
8.48
0.550
41.7
2.70
2.748
1,2,4-Trimethylbenzene
5.78
0.550
28.4
2.70
2.748
Benzyl chloride
ND
0.550
ND
2.85
2.748
1,3-Dichlorobenzene
ND
0.550
ND
3.31
2.748
1,4-Dichlorobenzene
ND
0.550
ND
3.31
2.748
1,2-Dichlorobenzene
ND
0.550
ND
3.31
2.748
1,2,4-Trichlorobenzene
ND
0.550
ND
4.08
2.748
Naphthalene
ND
0.550
ND
2.88
2.748
Hexachlorobutadiene
ND
0.550
ND
5.87
2.748
Acceptance
Internal Standard
% Recovery
Qualifier
Criteria
1,4-Difluorobenzene
84
60-140
Bromochloromethane
81
60-140
chlorobenzene-d5
101
60-140
L\LPHA
Page 8 of 47

Project Name: BLOC 83 GARAGE
Project Number: 35200786
SAMPLE RESULTS
Lab ID:
L2039161-02 D
Client ID:
GTA VS-8A
Sample Location:
HILLSBOROUGH ST. RALEIGH, NC
Sample Depth:
Matrix:
Soil _Vapor
Anaytical Method:
48,TO-15
Analytical Date:
09/24/20 04:03
Analyst:
TS
ppbV
Parameter
Results RL
Volatile Organics in Air - Mansfield Lab
Propylene
1.96
Dichlorodifluoromethane
ND
Chloromethane
ND
1,2-Dichloro-1,1,2,2-tetrafluoroethane
ND
Vinyl chloride
ND
1,3-Butadiene
ND
Bromomethane
ND
Chloroethane
ND
Ethyl Alcohol
33.0
Vinyl bromide
ND
Acetone
22.2
Trichlorofluoromethane
ND
iso-Propyl Alcohol
2.66
1,1-Dichloroethene
ND
Methylene chloride
ND
3-Chloropropene
ND
Carbon disulfide
0.650
1,1,2-Trichloro-1,2,2-Trifluoroethane
ND
trans-1,2-Dichloroethene
ND
1,1-Dichloroethane
ND
Methyl tert butyl ether
ND
Vinyl acetate
ND
2-Butanone
2.30
Serial No:09242016:00
Lab Number: L2039161
Report Date: 09/24/20
Date Collected: 09/16/20 14:40
Date Received: 09/18/20
Field Prep: Not Specified
ug/m3 Dilution
MDL Results RL MDL Qualifier Factor
1.43
3.37
2.46
2.864
0.573
ND
2.83
2.864
0.573
ND
1.18
2.864
0.573
ND
4.01
2.864
0.573
ND
1.46
2.864
0.573
ND
1.27
2.864
0.573
ND
2.22
2.864
0.573
ND
1.51
2.864
14.3
62.2
26.9
2.864
0.573
ND
2.51
2.864
2.86
52.7
6.79
2.864
0.573
ND
3.22
2.864
1.43
6.54
3.52
2.864
0.573
ND
2.27
2.864
1.43
ND
4.97
2.864
0.573
ND
1.79
2.864
0.573
2.02
1.78
2.864
0.573
ND
4.39
2.864
0.573
ND
2.27
2.864
0.573
ND
2.32
2.864
0.573
ND
2.07
2.864
2.86
ND
10.1
2.864
1.43
6.78
4.22
2.864
L\LPHA
Page 9 of 47

Project Name: BLOC 83 GARAGE
Project Number: 35200786
SAMPLE RESULTS
Lab ID: L2039161-02 D
Client ID: GTA VS-8A
Sample Location: HILLSBOROUGH ST. RALEIGH, NC
Sample Depth:
ppbV
Parameter Results RL
Volatile Organics in Air - Mansfield Lab
cis-1,2-Dichloroethene
ND
Ethyl Acetate
ND
Chloroform
0.799
Tetrahyd rofuran
ND
1,2-Dichloroethane
ND
n-Hexane
ND
1,1,1-Trichloroethane
ND
Benzene
ND
Carbon tetrachloride
ND
Cyclohexane
ND
Xylene (Total)
4.72
1,2-Dichloropropane
ND
Bromodichloromethane
ND
1,4-Dioxane
ND
Trichloroethene
ND
2,2,4-Trimethylpentane
ND
Heptane
ND
cis-1,3-Dichloropropene
ND
4-Methyl-2-pentanone
ND
trans- 1,3-Dichloropropene
ND
1,1,2-Trichloroethane
ND
1,2-Dichloroethene (total)
ND
Toluene
3.35
1,3-Dichloropropene, Total
ND
2-Hexanone
ND
Dibromochloromethane
ND
MDL Results
Serial No:09242016:00
Lab Number: L2039161
Report Date: 09/24/20
Date Collected: 09/16/20 14:40
Date Received: 09/18/20
Field Prep: Not Specified
ug/m3 Dilution
RL MDL Qualifier Factor
0.573
ND
2.27
2.864
1.43
ND
5.15
2.864
0.573
3.90
2.80
2.864
1.43
ND
4.22
2.864
0.573
ND
2.32
2.864
0.573
ND
2.02
2.864
0.573
ND
3.13
2.864
0.573
ND
1.83
2.864
0.573
ND
3.60
2.864
0.573
ND
1.97
2.864
0.573
20.5
2.49
2.864
0.573
ND
2.65
2.864
0.573
ND
3.84
2.864
0.573
ND
2.06
2.864
0.573
ND
3.08
2.864
0.573
ND
2.68
2.864
0.573
ND
2.35
2.864
0.573
ND
2.60
2.864
1.43
ND
5.86
2.864
0.573
ND
2.60
2.864
0.573
ND
3.13
2.864
0.573
ND
2.27
2.864
0.573
12.6
2.16
2.864
0.573
ND
2.60
2.864
0.573
ND
2.35
2.864
0.573
ND
4.88
2.864
L\LPHA
Page 10 of 47

Project Name: BLOC 83 GARAGE
Project Number: 35200786
SAMPLE RESULTS
Lab ID: L2039161-02 D
Client ID: GTA VS-8A
Sample Location: HILLSBOROUGH ST. RALEIGH, NC
Sample Depth:
ppbV
Parameter Results RL
Serial No:09242016:00
Lab Number: L2039161
Report Date: 09/24/20
Date Collected: 09/16/20 14:40
Date Received: 09/18/20
Field Prep: Not Specified
ug/m3 Dilution
MDL Results RL MDL Qualifier Factor
Volatile Organics in Air - Mansfield Lab
1,2-Dibromoethane
ND
0.573
ND
4.40
2.864
Tetrachloroethene
2.41
0.573
16.3
3.89
2.864
Chlorobenzene
ND
0.573
ND
2.64
2.864
Ethylbenzene
0.776
0.573
3.37
2.49
2.864
p/m-Xylene
3.52
1.14
15.3
4.95
2.864
Bromoform
ND
0.573
ND
5.92
2.864
Styrene
ND
0.573
ND
2.44
2.864
1,1,2,2-Tetrachloroethane
ND
0.573
ND
3.93
2.864
o-Xylene
1.20
0.573
5.21
2.49
2.864
4-Ethyltoluene
ND
0.573
ND
2.82
2.864
1,3,5-Trimethylbenzene
ND
0.573
ND
2.82
2.864
1,2,4-Trimethylbenzene
0.776
0.573
3.81
2.82
2.864
Benzyl chloride
ND
0.573
ND
2.97
2.864
1,3-Dichlorobenzene
ND
0.573
ND
3.45
2.864
1,4-Dichlorobenzene
ND
0.573
ND
3.45
2.864
1,2-Dichlorobenzene
ND
0.573
ND
3.45
2.864
1,2,4-Trichlorobenzene
ND
0.573
ND
4.25
2.864
Naphthalene
ND
0.573
ND
3.00
2.864
Hexachlorobutadiene
ND
0.573
ND
6.11
2.864
Acceptance
Internal Standard
% Recovery
Qualifier
Criteria
1,4-Difluorobenzene
84
60-140
Bromochloromethane
86
60-140
chlorobenzene-d5
96
60-140
L\LPHA
Page 11 of 47

Project Name: BLOC 83 GARAGE
Project Number: 35200786
SAMPLE RESULTS
Lab ID:
L2039161-03 D
Client ID:
GTA VS-813
Sample Location:
HILLSBOROUGH ST. RALEIGH, NC
Sample Depth:
Matrix:
Soil _Vapor
Anaytical Method:
48,TO-15
Analytical Date:
09/24/20 04:42
Analyst:
TS
ppbV
Parameter
Results RL
Volatile Organics in Air - Mansfield Lab
Propylene
ND
Dichlorodifluoromethane
0.511
Chloromethane
ND
1,2-Dichloro-1,1,2,2-tetrafluoroethane
ND
Vinyl chloride
ND
1,3-Butadiene
ND
Bromomethane
ND
Chloroethane
ND
Ethyl Alcohol
31.1
Vinyl bromide
ND
Acetone
21.9
Trichlorofluoromethane
0.568
iso-Propyl Alcohol
2.52
1,1-Dichloroethene
ND
Methylene chloride
ND
3-Chloropropene
ND
Carbon disulfide
0.581
1,1,2-Trichloro-1,2,2-Trifluoroethane
ND
trans-1,2-Dichloroethene
ND
1,1-Dichloroethane
ND
Methyl tert butyl ether
ND
Vinyl acetate
ND
2-Butanone
2.30
Serial No:09242016:00
Lab Number: L2039161
Report Date: 09/24/20
Date Collected: 09/16/20 14:40
Date Received: 09/18/20
Field Prep: Not Specified
ug/m3 Dilution
MDL Results RL MDL Qualifier Factor
1.25
ND
2.15
2.492
0.498
2.53
2.46
2.492
0.498
ND
1.03
2.492
0.498
ND
3.48
2.492
0.498
ND
1.27
2.492
0.498
ND
1.10
2.492
0.498
ND
1.93
2.492
0.498
ND
1.31
2.492
12.5
58.6
23.6
2.492
0.498
ND
2.18
2.492
2.49
52.0
5.91
2.492
0.498
3.19
2.80
2.492
1.25
6.19
3.07
2.492
0.498
ND
1.97
2.492
1.25
ND
4.34
2.492
0.498
ND
1.56
2.492
0.498
1.81
1.55
2.492
0.498
ND
3.82
2.492
0.498
ND
1.97
2.492
0.498
ND
2.02
2.492
0.498
ND
1.80
2.492
2.49
ND
8.77
2.492
1.25
6.78
3.69
2.492
L\LPHA
Page 12 of 47

Project Name: BLOC 83 GARAGE
Project Number: 35200786
SAMPLE RESULTS
Lab ID: L2039161-03 D
Client ID: GTA VS-813
Sample Location: HILLSBOROUGH ST. RALEIGH, NC
Sample Depth:
ppbV
Parameter Results RL
Volatile Organics in Air - Mansfield Lab
cis-1,2-Dichloroethene
ND
Ethyl Acetate
ND
Chloroform
0.855
Tetrahydrofuran
1.52
1,2-Dichloroethane
ND
n-Hexane
ND
1,1,1-Trichloroethane
ND
Benzene
ND
Carbon tetrachloride
ND
Cyclohexane
ND
Xylene (Total)
4.34
1,2-Dichloropropane
ND
Bromodichloromethane
ND
1,4-Dioxane
ND
Trichloroethene
ND
2,2,4-Trimethylpentane
ND
Heptane
ND
cis-1,3-Dichloropropene
ND
4-Methyl-2-pentanone
ND
trans- 1,3-Dichloropropene
ND
1,1,2-Trichloroethane
ND
1,2-Dichloroethene (total)
ND
Toluene
3.25
2-Hexanone
ND
1,3-Dichloropropene, Total
ND
Dibromochloromethane
ND
MDL Results
Serial No:09242016:00
Lab Number: L2039161
Report Date: 09/24/20
Date Collected: 09/16/20 14:40
Date Received: 09/18/20
Field Prep: Not Specified
ug/m3 Dilution
RL MDL Qualifier Factor
0.498
ND
1.97
2.492
1.25
ND
4.50
2.492
0.498
4.18
2.43
2.492
1.25
4.48
3.69
2.492
0.498
ND
2.02
2.492
0.498
ND
1.76
2.492
0.498
ND
2.72
2.492
0.498
ND
1.59
2.492
0.498
ND
3.13
2.492
0.498
ND
1.71
2.492
0.498
18.9
2.16
2.492
0.498
ND
2.30
2.492
0.498
ND
3.34
2.492
0.498
ND
1.79
2.492
0.498
ND
2.68
2.492
0.498
ND
2.33
2.492
0.498
ND
2.04
2.492
0.498
ND
2.26
2.492
1.25
ND
5.12
2.492
0.498
ND
2.26
2.492
0.498
ND
2.72
2.492
0.498
ND
1.97
2.492
0.498
12.2
1.88
2.492
0.498
ND
2.04
2.492
0.498
ND
2.26
2.492
0.498
ND
4.24
2.492
LUPHA
Page 13 of 47

Project Name: BLOC 83 GARAGE
Project Number: 35200786
SAMPLE RESULTS
Lab ID: L2039161-03 D
Client ID: GTA VS-813
Sample Location: HILLSBOROUGH ST. RALEIGH, NC
Sample Depth:
ppbV
Parameter Results RL
Serial No:09242016:00
Lab Number: L2039161
Report Date: 09/24/20
Date Collected: 09/16/20 14:40
Date Received: 09/18/20
Field Prep: Not Specified
ug/m3 Dilution
MDL Results RL MDL Qualifier Factor
Volatile Organics in Air - Mansfield Lab
1,2-Dibromoethane
ND
0.498
ND
3.83
2.492
Tetrachloroethene
2.27
0.498
15.4
3.38
2.492
Chlorobenzene
ND
0.498
ND
2.29
2.492
Ethylbenzene
0.728
0.498
3.16
2.16
2.492
p/m-Xylene
3.22
0.997
14.0
4.33
2.492
Bromoform
ND
0.498
ND
5.15
2.492
Styrene
ND
0.498
ND
2.12
2.492
1,1,2,2-Tetrachloroethane
ND
0.498
ND
3.42
2.492
o-Xylene
1.12
0.498
4.86
2.16
2.492
4-Ethyltoluene
ND
0.498
ND
2.45
2.492
1,3,5-Trimethylbenzene
ND
0.498
ND
2.45
2.492
1,2,4-Trimethylbenzene
0.768
0.498
3.78
2.45
2.492
Benzyl chloride
ND
0.498
ND
2.58
2.492
1,3-Dichlorobenzene
ND
0.498
ND
2.99
2.492
1,4-Dichlorobenzene
ND
0.498
ND
2.99
2.492
1,2-Dichlorobenzene
ND
0.498
ND
2.99
2.492
1,2,4-Trichlorobenzene
ND
0.498
ND
3.70
2.492
Naphthalene
ND
0.498
ND
2.61
2.492
Hexachlorobutadiene
ND
0.498
ND
5.31
2.492
Acceptance
Internal Standard
% Recovery
Qualifier
Criteria
1,4-Difluorobenzene
84
60-140
Bromochloromethane
84
60-140
chlorobenzene-d5
97
60-140
L\LPHA
Page 14 of 47

Project Name: BLOC 83 GARAGE
Project Number: 35200786
SAMPLE RESULTS
Lab ID:
L2039161-04 D
Client ID:
GTA VS-9
Sample Location:
HILLSBOROUGH ST. RALEIGH, NC
Sample Depth:
Matrix:
Soil _Vapor
Anaytical Method:
48,TO-15
Analytical Date:
09/24/20 05:21
Analyst:
TS
ppbV
Parameter
Results RL
Volatile Organics in Air - Mansfield Lab
Propylene
ND
Dichlorodifluoromethane
0.479
Chloromethane
0.527
1,2-Dichloro-1,1,2,2-tetrafluoroethane
ND
Vinyl chloride
ND
1,3-Butadiene
ND
Bromomethane
ND
Chloroethane
ND
Ethyl Alcohol
67.9
Vinyl bromide
ND
Acetone
21.9
Trichlorofluoromethane
ND
iso-Propyl Alcohol
3.28
1,1-Dichloroethene
ND
Methylene chloride
ND
3-Chloropropene
ND
Carbon disulfide
0.505
1,1,2-Trichloro-1,2,2-Trifluoroethane
ND
trans-1,2-Dichloroethene
ND
1,1-Dichloroethane
ND
Methyl tert butyl ether
ND
Vinyl acetate
ND
2-Butanone
2.00
Serial No:09242016:00
Lab Number: L2039161
Report Date: 09/24/20
Date Collected: 09/16/20 14:14
Date Received: 09/18/20
Field Prep: Not Specified
ug/m3 Dilution
MDL Results RL MDL Qualifier Factor
1.08
ND
1.86
2.169
0.434
2.37
2.15
2.169
0.434
1.09
0.896
2.169
0.434
ND
3.03
2.169
0.434
ND
1.11
2.169
0.434
ND
0.960
2.169
0.434
ND
1.69
2.169
0.434
ND
1.15
2.169
10.8
128
20.3
2.169
0.434
ND
1.90
2.169
2.17
52.0
5.15
2.169
0.434
ND
2.44
2.169
1.08
8.06
2.65
2.169
0.434
ND
1.72
2.169
1.08
ND
3.75
2.169
0.434
ND
1.36
2.169
0.434
1.57
1.35
2.169
0.434
ND
3.33
2.169
0.434
ND
1.72
2.169
0.434
ND
1.76
2.169
0.434
ND
1.56
2.169
2.17
ND
7.64
2.169
1.08
5.90
3.19
2.169
AUPHA
Page 15 of 47

Project Name: BLOC 83 GARAGE
Project Number: 35200786
SAMPLE RESULTS
Lab ID: L2039161-04 D
Client ID: GTA VS-9
Sample Location: HILLSBOROUGH ST. RALEIGH, NC
Sample Depth:
ppbV
Parameter Results RL
Volatile Organics in Air - Mansfield Lab
cis-1,2-Dichloroethene
ND
Ethyl Acetate
ND
Chloroform
ND
Tetrahydrofuran
6.76
1,2-Dichloroethane
ND
n-Hexane
ND
1,1,1-Trichloroethane
ND
Benzene
ND
Carbon tetrachloride
ND
Cyclohexane
4.10
1,2-Dichloropropene
ND
Xylene (Total)
6.93
Bromodichloromethane
ND
1,4-Dioxane
ND
Trichloroethene
ND
2,2,4-Trimethylpentane
ND
Heptane
ND
cis-1,3-Dichloropropene
ND
4-Methyl-2-pentanone
ND
trans- 1,3-Dichloropropene
ND
1,1,2-Trichloroethane
ND
1,2-Dichloroethene (total)
ND
Toluene
4.47
1,3-Dichloropropene, Total
ND
2-Hexanone
ND
Dibromochloromethane
ND
MDL Results
Serial No:09242016:00
Lab Number: L2039161
Report Date: 09/24/20
Date Collected: 09/16/20 14:14
Date Received: 09/18/20
Field Prep: Not Specified
ug/m3 Dilution
RL MDL Qualifier Factor
0.434
ND
1.72
2.169
1.08
ND
3.89
2.169
0.434
ND
2.12
2.169
1.08
19.9
3.19
2.169
0.434
ND
1.76
2.169
0.434
ND
1.53
2.169
0.434
ND
2.37
2.169
0.434
ND
1.39
2.169
0.434
ND
2.73
2.169
0.434
14.1
1.49
2.169
0.434
ND
2.01
2.169
0.434
30.1
1.89
2.169
0.434
ND
2.91
2.169
0.434
ND
1.56
2.169
0.434
ND
2.33
2.169
0.434
ND
2.03
2.169
0.434
ND
1.78
2.169
0.434
ND
1.97
2.169
1.08
ND
4.43
2.169
0.434
ND
1.97
2.169
0.434
ND
2.37
2.169
0.434
ND
1.72
2.169
0.434
16.8
1.64
2.169
0.434
ND
1.97
2.169
0.434
ND
1.78
2.169
0.434
ND
3.70
2.169
L\LPHA
Page 16 of 47

Project Name: BLOC 83 GARAGE
Project Number: 35200786
SAMPLE RESULTS
Lab ID: L2039161-04 D
Client ID: GTA VS-9
Sample Location: HILLSBOROUGH ST. RALEIGH, NC
Sample Depth:
ppbV
Parameter Results RL
Serial No:09242016:00
Lab Number: L2039161
Report Date: 09/24/20
Date Collected: 09/16/20 14:14
Date Received: 09/18/20
Field Prep: Not Specified
ug/m3 Dilution
MDL Results RL MDL Qualifier Factor
Volatile Organics in Air - Mansfield Lab
1,2-Dibromoethane
ND
0.434
ND
3.34
2.169
Tetrachloroethene
ND
0.434
ND
2.94
2.169
Chlorobenzene
ND
0.434
ND
2.00
2.169
Ethylbenzene
1.14
0.434
4.95
1.89
2.169
p/m-Xylene
5.01
0.868
21.8
3.77
2.169
Bromoform
ND
0.434
ND
4.49
2.169
Styrene
ND
0.434
ND
1.85
2.169
1,1,2,2-Tetrachloroethane
ND
0.434
ND
2.98
2.169
o-Xylene
1.92
0.434
8.34
1.89
2.169
4-Ethyltoluene
ND
0.434
ND
2.13
2.169
1,3,5-Trimethylbenzene
ND
0.434
ND
2.13
2.169
1,2,4-Trimethylbenzene
1.16
0.434
5.70
2.13
2.169
Benzyl chloride
ND
0.434
ND
2.25
2.169
1,3-Dichlorobenzene
ND
0.434
ND
2.61
2.169
1,4-Dichlorobenzene
ND
0.434
ND
2.61
2.169
1,2-Dichlorobenzene
ND
0.434
ND
2.61
2.169
1,2,4-Trichlorobenzene
ND
0.434
ND
3.22
2.169
Naphthalene
ND
0.434
ND
2.28
2.169
Hexachlorobutadiene
ND
0.434
ND
4.63
2.169
Acceptance
Internal Standard
% Recovery
Qualifier
Criteria
1,4-Difluorobenzene
83
60-140
Bromochloromethane
83
60-140
chlorobenzene-d5
97
60-140
LILPHA
Page 17 of 47

Project Name: BLOC 83 GARAGE
Project Number: 35200786
Serial No:09242016:00
Lab Number: L2039161
Report Date: 09/24/20
Analytical Method: 48,TO-15
Analytical Date: 09/23/20 15:46
Parameter
Method Blank Analysis
Batch Quality Control
ppbV
Results RL MDL
ug/m3 Dilution
Results RL MDL Qualifier Factor
Volatile Organics in Air - Mansfield Lab for sample(s): 01-04
Batch: WG1413688-4
Chlorodifluoromethane
ND
0.200
ND
0.707
Propylene
ND
0.500
ND
0.861
Propane
ND
0.500
ND
0.902
Dichlorodifluoromethane
ND
0.200
ND
0.989
Chloromethane
ND
0.200
ND
0.413
1,2-Dichloro-1,1,2,2-tetrafluoroethane
ND
0.200
ND
1.40
Methanol
ND
5.00
ND
6.55
Vinyl chloride
ND
0.200
ND
0.511
1,3-Butadiene
ND
0.200
ND
0.442
Butane
ND
0.200
ND
0.475
Bromomethane
ND
0.200
ND
0.777
Chloroethane
ND
0.200
ND
0.528
Ethyl Alcohol
ND
5.00
ND
9.42
Dichlorofluoromethane
ND
0.200
ND
0.842
Vinyl bromide
ND
0.200
ND
0.874
Acrolein
ND
0.500
ND
1.15
Acetone
ND
1.00
ND
2.38
Acetonitrile
ND
0.200
ND
0.336
Trichlorofluoromethane
ND
0.200
ND
1.12
iso-Propyl Alcohol
ND
0.500
ND
1.23
Acrylonitrile
ND
0.500
ND
1.09
Pentane
ND
0.200
ND
0.590
Ethyl ether
ND
0.200
ND
0.606
1,1-Dichloroethene
ND
0.200
ND
0.793
tert-Butyl Alcohol
ND
0.500
ND
1.52
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
FNIVUR"44
Page 18 of 47

Project Name: BLOC 83 GARAGE
Project Number: 35200786
Serial No:09242016:00
Lab Number: L2039161
Report Date: 09/24/20
Analytical Method: 48,TO-15
Analytical Date: 09/23/20 15:46
Parameter
Method Blank Analysis
Batch Quality Control
ppbV
Results RL MDL
ug/m3 Dilution
Results RL MDL Qualifier Factor
Volatile Organics in Air - Mansfield Lab for sample(s): 01-04
Batch: WG1413688-4
Methylene chloride
ND
0.500
ND
1.74
3-Chloropropene
ND
0.200
ND
0.626
Carbon disulfide
ND
0.200
ND
0.623
1,1,2-Trichloro-1,2,2-Trifluoroethane
ND
0.200
ND
1.53
trans-1,2-Dichloroethene
ND
0.200
ND
0.793
1,1-Dichloroethane
ND
0.200
ND
0.809
Methyl tert butyl ether
ND
0.200
ND
0.721
Vinyl acetate
ND
1.00
ND
3.52
Xylene (Total)
ND
0.200
ND
0.869
2-Butanone
ND
0.500
ND
1.47
cis-1,2-Dichloroethene
ND
0.200
ND
0.793
Ethyl Acetate
ND
0.500
ND
1.80
Chloroform
ND
0.200
ND
0.977
Tetrahydrofuran
ND
0.500
ND
1.47
2,2-Dichloropropane
ND
0.200
ND
0.924
1,2-Dichloroethane
ND
0.200
ND
0.809
n-Hexane
ND
0.200
ND
0.705
Isopropyl Ether
ND
0.200
ND
0.836
Ethyl-Tert-Butyl-Ether
ND
0.200
ND
0.836
1,2-Dichloroethene (total)
ND
0.200
ND
0.793
1,1,1-Trichloroethane
ND
0.200
ND
1.09
1,1-Dichloropropene
ND
0.200
ND
0.908
1,3-Dichloropropene, Total
ND
0.200
ND
0.908
Benzene
ND
0.200
ND
0.639
Carbon tetrachloride
ND
0.200
ND
1.26
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
FNIVUR"44
Page 19 of 47

Project Name: BLOC 83 GARAGE
Project Number: 35200786
Serial No:09242016:00
Lab Number: L2039161
Report Date: 09/24/20
Analytical Method: 48,TO-15
Analytical Date: 09/23/20 15:46
Parameter
Method Blank Analysis
Batch Quality Control
ppbV
Results RL MDL
ug/m3 Dilution
Results RL MDL Qualifier Factor
Volatile Organics in Air - Mansfield Lab for sample(s): 01-04
Batch: WG1413688-4
Cyclohexane
ND
0.200
ND
0.688
Tertiary -Amyl Methyl Ether
ND
0.200
ND
0.836
Dibromomethane
ND
0.200
ND
1.42
1,2-Dichloropropane
ND
0.200
ND
0.924
Bromodichloromethane
ND
0.200
ND
1.34
1,4-Dioxane
ND
0.200
ND
0.721
Trichloroethene
ND
0.200
ND
1.07
2,2,4-Trimethylpentane
ND
0.200
ND
0.934
Methyl Methacrylate
ND
0.500
ND
2.05
Heptane
ND
0.200
ND
0.820
cis- 1,3-Dichloropropene
ND
0.200
ND
0.908
4-Methyl-2-pentanone
ND
0.500
ND
2.05
trans-1,3-Dichloropropene
ND
0.200
ND
0.908
1,1,2-Trichloroethane
ND
0.200
ND
1.09
Toluene
ND
0.200
ND
0.754
1,3-Dichloropropane
ND
0.200
ND
0.924
2-Hexanone
ND
0.200
ND
0.820
Dibromochloromethane
ND
0.200
ND
1.70
1,2-Dibromoethane
ND
0.200
ND
1.54
Butyl Acetate
ND
0.500
ND
2.38
Octane
ND
0.200
ND
0.934
Tetrachloroethene
ND
0.200
ND
1.36
1, 1, 1,2-Tetrachloroethane
ND
0.200
ND
1.37
Chlorobenzene
ND
0.200
ND
0.921
Ethylbenzene
ND
0.200
ND
0.869
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Page 20 of 47

Project Name: BLOC 83 GARAGE
Project Number: 35200786
Serial No:09242016:00
Lab Number: L2039161
Report Date: 09/24/20
Analytical Method: 48,TO-15
Analytical Date: 09/23/20 15:46
Parameter
Method Blank Analysis
Batch Quality Control
ppbV
Results RL MDL
ug/m3 Dilution
Results RL MDL Qualifier Factor
Volatile Organics in Air - Mansfield Lab for sample(s): 01-04
Batch: WG1413688-4
p/m-Xylene
ND
0.400
ND
1.74
Bromoform
ND
0.200
ND
2.07
Styrene
ND
0.200
ND
0.852
1,1,2,2-Tetrachloroethane
ND
0.200
ND
1.37
o-Xylene
ND
0.200
ND
0.869
1,2,3-Trichloropropane
ND
0.200
ND
1.21
Nonane (C9)
ND
0.200
ND
1.05
Isopropyl benzene
ND
0.200
ND
0.983
Bromobenzene
ND
0.200
ND
0.793
o-Chlorotoluene
ND
0.200
ND
1.04
n-Propylbenzene
ND
0.200
ND
0.983
p-Chlorotoluene
ND
0.200
ND
1.04
4-Ethyltoluene
ND
0.200
ND
0.983
1,3,5-Trimethyl benzene
ND
0.200
ND
0.983
tert-Butyl benzene
ND
0.200
ND
1.10
1,2,4-Trimethyl benzene
ND
0.200
ND
0.983
Decane (C10)
ND
0.200
ND
1.16
Benzyl chloride
ND
0.200
ND
1.04
1,3-Dichlorobenzene
ND
0.200
ND
1.20
1,4-Dichlorobenzene
ND
0.200
ND
1.20
sec -Butyl benzene
ND
0.200
ND
1.10
p-Isopropyltoluene
ND
0.200
ND
1.10
1,2-Dichlorobenzene
ND
0.200
ND
1.20
n-Butylbenzene
ND
0.200
ND
1.10
1,2-Dibromo-3-chloropropane
ND
0.200
ND
1.93
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
FNIVUR"44
Page 21 of 47

Project Name: BLOC 83 GARAGE
Project Number: 35200786
Serial No:09242016:00
Lab Number: L2039161
Report Date: 09/24/20
Analytical Method: 48,TO-15
Analytical Date: 09/23/20 15:46
Parameter
Method Blank Analysis
Batch Quality Control
ppbV
Results RL MDL
ug/m3 Dilution
Results RL MDL Qualifier Factor
Volatile Organics in Air - Mansfield Lab for sample(s): 01-04
Batch: WG1413688-4
Undecane
ND
0.200
ND
1.28
Dodecane (C12)
ND
0.200
ND
1.39
1,2,4-Trichlorobenzene
ND
0.200
ND
1.48
Naphthalene
ND
0.200
ND
1.05
1,2,3-Trichlorobenzene
ND
0.200
ND
1.48
Hexachlorobutadiene
ND
0.200
ND
2.13
1
1
1
1
1
1
Page 22 of 47

0
O
r
O
N
N
O
O
0
Z
N
''(^v
vJ
r
(.0 CD
r N
m
M It
N
O 0')
J O
L
E
Z p
Q
J �
O
CO
U
W
C�
Q
Q
co co
co co
ti
U CD
O oN
mLO
co
rL
rx
ro
co
co
co
(D>
U
co
Co
v
0
0
a�
n
E
O
is
U
O
cn
(n
Q
co
J
N
c
C6
Q
U
co
2)
O
[V
0
o O o O o O O o O o O O o O o O O o O o O O o
M M M C2 M M M M C2 M M M Cfl c2 M M c0 M C2 c0 c2 M (M
O O O O O O O O O O O O O O O O O O O O O O O
o o o o r 0 0 o 0 0 0 6 V 6 r r V 6 6 V 6 6 6
a �
O I- r- r� W V O N O CO N r� M Ih CO W M LO r� M NO N
a�
m
L
am
O
`O
N C O N
C co C C
co co
O L O
(U N N
E
p o c 7 c p w o L O
o o a D t L
� o o a O Q a
O 5, `O O U N U � C O O Q O -0 '� O O O 00 N N
a n
L O O U -2 N C m 7 O L L U C U U U O U N L
U a` CL o U >— CO CO U w o>¢¢¢ N¢ a w
s-
J
O
C'7
N
IL

0
O
r
O
N
N
O
O
0
Z
N
�L
''(D^
vJ
r
(.0 CD
r N
m
M It
N
O 0')
J O
L
E
Z p
Q
J �
O
CO
U
W
C�
Q
Q
co co
co co
ti
U CD
O oN
mLO
co
d
rL
rx
ro
co
co
co
(D>
U
co
Co
v
0
0
a�
0_
E
O
is
U
O
(n
w
Q
co
J
N
c
c
U
co
0)
O
0
o O o O o O O o O o O O o O o O O o O o CD
M M M CM M M M M CM M M M M CM M M M M CM M (M
O O O O O O O O O O O O O O O O O O O O O
O (0 N CDCn O N CD N CD 'IT CDr� O � CD M (n M N N M
m N M O O CD co co O O CD co co W 00 CO fl. 00 CO co c0 co O
a)
c
a
0
`o
s=
N w N c v V C
N N N c 0 ,L-. C N L.. N c (6
C 'O 7 O C N N Q C W C C L
Y 00 (9 Ot .2 y .L.. y O
L_ 3 N CD
O U O O O O a U L @ O O m O O O
O Q O V1 L O O C U O O -5 O O L
L 5 O -0 U CV L (OD or_ U O a L L C a a)L L U
7
U T p CO Q O t U_ U_ X � U_ U_
m L L L N w
r N U �p N C m rn L r N N 2 O L N N
M U > N U W U F N C w W
s-
J

0
O
r
O
N
N
O
O
0
Z
N
�L
''(D^
vJ
r
(.0 CD
r N
m
M It
N
O 0')
J O
L
E
Z p
Q
J �
O
CO
U
W
C�
Q
Q
co co
co co
ti
U CD
o oN
mLO
co
rL
rx
ro
co
co
co
(>
U
co
Co
v
0
0
a�
n
E
C6
O
is
U
O
cn
w
Q
co
J
N
c
C
U
co
0)
0
0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
cM M M c2 M c2 M M c2 M c2 c0 M c2 M c2 M M c2 M c2 M c2
oO O O O O O O O O O O O O O O O O O O O O O O
o o o o 0 0 o 0 0 0 V 6 6 r r 6 6 6 r r 6 6
0 o 0 V O O O 0 O O
rn w rn m w co w rn rn m w co rn
� o
y c
W N N C N N
C: c a a c
2 16 p ° Cal Ca LCn o c- E c- m
C
O O O OONm
O @ C N O ° N r w L °- O O N O
° °? X Q ° cLi m £ o U N . u o o u o 0
L O L X 0 N T C7 U L C O U
U c r £ U o o_ p H c M w 7 H c U @ £ �_ Q
N 4 ° N ° p 0 L V L Q O N N O p T
N (0 T N 4 N 0 V .V N N N w cc, O M 2 4 N
m U U F i5 — CO — F N 2 2 U V t= — F —7 N —7 m
s-
J
O
LO
N
0)
m
0-

0
O
r
O
N
N
O
O
0
Z
N
�L
''(D^
vJ
r
(.0 CD
r N
m
M It
N
O 0')
J O
L
E
Z p
Q
J �
O
CO
U
W
C�
Q
Q
co co
co co
ti
U o
O oN
mLO
co
N
rL
rx
ro
co
co
co
(>
U
co
Co
v
0
0
a�
n
E
C6
N
O
is
U
O
cn
w
Q
co
J
N
c
C
U
co
2)
O
0
O O O O O O O O O O O O O O O O O O O O O O O
M M M c2 M M M M c2 M M M M c2 M M M M c2 M M M c2
O O O O O O O O O O O O O O O O O O O O O O O
M c0 of I� O 7 of O 7 V M � r O M r
co
r
� m
c c
s Y c c c
O O n C C
C O O 2 O N O O N
L U C U O _ N C O O O N O N
00 N a)c N m O O O N O C O N N N N O O
O N C a7 U C..i 9 C O -0 O O 9 £ U L
C
F C T O T O O y U
Ocr U N O X O C N O ~ C p O O n O >. 7 C T
O O T E N j, M Q E L OL L L m U C
U L E E w X N O O E O d O W M r N a)N
O F - O w n co to - o Z 10 CO o c a v — — O m
s-
J
O
CD
N
IL

0
O
r
O
N
N
O
O
0
Z
N
�L
''(D^
vJ
r
(.0 CD
r N
m
M It
N
O 0')
J O
L
E
Z p
Q
J �
O
Ca
U
W
C�
Q
Q
co co
co co
ti
U CD
O oN
mLo
co
N
E E
m =
Z Z
O O
a a`
rL
rx
ro
co
co
co
(>
U
co
Co
v
0
0
a�
n
E
C6
O
is
U
O
cn
w
Q
co
J
N
c
C
U
co
0)
O
0
0 0 0 0 0 0 0 0 0 0 0 0 0
cM M M c2 M c2 M M c2 M c2 c2 M
O O O O O O O O O O O O O
rn 0 0 o ao � v o �n rn
m
a
0
a � m
a a °
C C O C O N N
N N C N
C C O N C U N 4 -0 m
U O N O O C M O O O
O O O N O U O C O 9
O O _s T p C E O O E N t O
L L T p L � O C C .V .V O
U
C? N L �.j x
M 7 O N N m N C p N N
rn 0- c 0 1- Z 2
s-
O
N
(D
0)
m
0-

0
O
O
N
N
O
O
O
z
U)
co 0
N
O)
(M
O N
J O
W
Q
r'
Q
C7 O
O 00
ti
U O
O o
J N
LO
m M
i
N
E E
m 7
Z Z
d (D
O .O
a a
w .-
U)
Q LO m Un LO LO LO LO LO LO LO m LO m m m LO m LO m LO m
n- N N N N N N N N N N N N N N N N N N N N N
rV
r-.
C
O
U
O
i
O
m O U U U U U U U M U U N U U U U U U U U
CM Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z
O
N
J
_N
Q
E
co
U a a a a a a a a a a a a a a a a a a a a a
a n n n n n 0-
LO
0o
00
_M
U' r:i ❑ ❑ ❑ ❑ ❑ ❑ ❑ C° ❑ ❑ p ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑
N Z Z Z Z Z Z Z Z Z �,.� Z Z Z Z Z Z Z Z
L
U
(0
m
U
0
0
❑ ❑ ❑ ❑ ❑ ❑ ❑ 10 ❑ ❑ ❑ ❑ ❑NZZZZZZZZZpZZZ Z❑ Z❑ Z❑ Z❑ Z� N r � co
❑
_N
CQ
C
m
U)
N
y-+
(0
•U
O
N
N
Q
(0
J
__0
O c 0
� t m
C � L
m 0
- `o
O
w �
L (DMS — 0
L
a)•� N L O 0 N N 0 L
U E N O p C 70 O O C O
L 0 0 0
O O
(a m O '0 N C O •'00 O Q O U 0 7 O U O 4
_ L 7 N
0 -0 0 O -0 0 L O >. C n a U ❑ O N
O 0T OO U O O
O p NI LU T
O- :E O ❑ 5, E O >. >. L d L L -0 N N ❑ L
O _U L N C ch O L L C U 0 O
_m d ❑ U > m U W > Q H .N M U ..
O

0
O
O
N
N
O
O
O
z
U)
co 0
N
O)
(M
O N
J O
W
Q
r'
Q
C7 O
O 00
ti
U O
O o
J N
LO
m M
N
4)
E E
m 7
Z Z
d (D
O .O
a a
w .-
U)
Q LO m LO LO LO LO LO LO LO LO m LO m m m LO m LO m LO m
n— N N N N N N N N N N N N N N N N N N N N N
rV
r-.
C
O
U
O
i
O
� U N U U U N U N U U U M U U U U U U U
M Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z
O
N
J
_N
Q
E
co
U a a a a a a a a a a a a a a a a a a a a a
a n n n n n n n n n n n n n n n n n n n n
LO
0o
00
_M
Z o6Z Z Z N Z N Z Z Z Z � Z Z Z Z Z Z
L
U
(0
m
U
0
0
,,� Z 0oZ Z Z N Z N Z Z Z � Z� Z Z Z Z � Z Z
_N
CQ
C
m
U)
N
y-+
(0
U
O
N
N
Q
(0
J
_0
O
U)
C
m
i
L_
Q N C C O N
C N C d O co
L (B a O
(n C L O d N O
U 00 C N O On E NO- p
a) O N 3 d O N O 0- Q
m � U O O L O O L C L O U N
O•�L UNC m(6 ❑ U O 'UN 0N LO 'O X N
O O O O O
H NN QL O X 0 L NaN
Cl) �L
co >1
,
_ N 'U W U H c 00 U U X m H N 2 U V
0

/
5
\
\
0
k
-FI
m
�
E E
/ /
: :
0 2
a a
a. a\
w _
/ G a N N a N N N a N N N a N N N a N N a a
0
\
2
/
/
9
\ e e o e o e o e e= e e o= r CD e
r z z z- z z z z z z - z z z z z
\
-j
2
e
E
co
cn a j 2 2 2 j j 2 2 2 j 2 2 2 j 2 2 2 2 2 j
U k E E k k E E k k E E k k E E k k E k k E
0
k
%
7
\ c e e@ c e e e 2 2 2@ e e e@ p\ R e e
z z z\ z z z z z z a/ z z z%= a z z
\
7
�
U
O
/ z z z\® z z z z z z G/° z z z\°\\ p ze za =ae
V
CL
E
I
\
\
\
k
/
7
/
/
m ¥ 0 = j = o
k] oa)2i §§
E° e §E $ § \§oQ _ « o e / o/ o}(/ c E\ t\ 7
/ \ \ j ( / \ 00 \ \ \ / E ° / ( ƒ / / \
% \ \ / / / § § / / \ 1 k j / \ 6 § \ \ / \
/

0
O
O
N
N
O
O
O
z
U)
co 0
N
O)
(M
O N
J O
W
Q
r'
Q
M O
O 00
ti
U O
O o
J N
LO
m M
N
E E
m =
Z Z
d N
a` a
w .-
U)
r� N N N N N
V
r-+
C
O
U
O
i
O
M Z Z Z Z Z
O
N
J
_N
Q
E
co
LO
0o
00
_M
z z z z z
L
U
co
m
U
O
0
0 0 0 0 0
z z z z z
m
CL
E
m
U)
N
co
U
O
N
N
Q
c0
J
_0
O
U)
C
m
i
L_
Q
C �
N N C N
V% N N d 'p
U_ C C m
C -5 o
co 0 o a c o
O O U N O
O �_ _2 F7 � Fo :OE
U
_N 0 x
_m z z
O
O
M
O
m
d

0
O
C)
N
N
O
O
z�
(D O
� � N
'i Cl)
N O N
J O
C� �
G 0
7 �
Z O
Q
J �
w
0
Q
Q
Cl) (9
00 Cp
rl-
U o
O o
m co
i
tV
d �
E E
m m
Z Z
d d
O O
a a
r
N
O
Cl)
m
a
1�1
CM
LO
6
N
y
N
co
a
N
O
7
v
O
M
0
N
J
N_
O
M
M
O
N
V
0
c
m
U
J
O
M
N
0
N
LO
oi
N
y
U7
O
a
N
O
V
v
co
M
0
N
J
N
O
co
M
O
N
V
C)
0
c
m
U
J
O
n
V
N
0
N
O
C`•)
O
N
7
0
0
LO
3
O
LL
(0
CD
O
ri
LO
6
N
N
co
co
a
N
O
V
v
O
co
0
N
J 1-
N_
O
cM
m
O
N
V
0
0
c
m
U
J
O
LO
N
O
C`•)
O
N
V
CD
0
LO
3
O
LL
00
00
O
O
0
LO
a;
N
N
y
O
a
N
O
V
v
co
M
O
N
J
N
O
co
m
O
N
V
O
c
m
U
J
O
CA
W
co
G
¢
¢
m
m
op
�
op
�
CP
m
c
d)
(n
d)
w
d)
(n
U)
(n
m
>
>
>
>
>
>
>
>
0
3
0
0
0
0
0
0
0
0
C
V:
NNNNNNNN
J
J
J
J
J
J
J
J

Serial No:09242016:00
Project Name: BATCH CANISTER CERTIFICATION Lab Number: L2036144
Project Number: CANISTER QC BAT Report Date: 09/24/20
Air Canister Certification Results
Lab ID:
L2036144-02
Date Collected:
09/01/20 16:00
Client ID:
CAN 722 SHELF 23
Date Received:
09/02/20
Sample Location:
Field Prep:
Not Specified
Sample Depth:
Matrix:
Air
Anaytical Method:
48,TO-15
Analytical Date:
09/03/20 21:45
Analyst:
EW
ppbV
ug/m3
Dilution
Parameter
Results
RL MDL
Results
RL MDL Qualifier
Factor
Volatile Organics in Air
- Mansfield Lab
Chlorodifluoromethane
ND
0.200
ND
0.707
1
Propylene
ND
0.500
ND
0.861
1
Propane
ND
0.500
ND
0.902
1
Dichlorodifluoromethane
ND
0.200
ND
0.989
1
Chloromethane
ND
0.200
ND
0.413
1
Freon-114
ND
0.200
ND
1.40
1
Methanol
ND
5.00
ND
6.55
1
Vinyl chloride
ND
0.200
ND
0.511
1
1,3-Butadiene
ND
0.200
ND
0.442
1
Butane
ND
0.200
ND
0.475
1
Bromomethane
ND
0.200
ND
0.777
1
Chloroethane
ND
0.200
ND
0.528
1
Ethanol
ND
5.00
ND
9.42
1
Dichlorofluoromethane
ND
0.200
ND
0.842
1
Vinyl bromide
ND
0.200
ND
0.874
1
Acrolein
ND
0.500
ND
1.15
1
Acetone
ND
1.00
ND
2.38
1
Acetonitrile
ND
0.200
ND
0.336
1
Trichlorofluoromethane
ND
0.200
ND
1.12
1
Isopropanol
ND
0.500
ND
1.23
1
Acrylonitrile
ND
0.500
ND
1.09
1
Pentane
ND
0.200
ND
0.590
1
Ethyl ether
ND
0.200
ND
0.606
1
1, 1 -Dichloroethene
ND
0.200
ND
0.793
1
L\LPHA
Page 33 of 47

Project Name: BATCH CANISTER CERTIFICATION
Project Number: CANISTER QC BAT
Air Canister Certification Results
Lab ID: L2036144-02
Client ID: CAN 722 SHELF 23
Sample Location:
Sample Depth:
Parameter
Results
Volatile Organics in Air - Mansfield Lab
Tertiary butyl Alcohol
ND
Methylene chloride
ND
3-Chloropropene
ND
Carbon disulfide
ND
Freon-113
ND
trans-1,2-Dichloroethene
ND
1,1-Dichloroethane
ND
Methyl tert butyl ether
ND
Vinyl acetate
ND
Xylenes, total
ND
2-Butanone
ND
cis-1,2-Dichloroethene
ND
Ethyl Acetate
ND
Chloroform
ND
Tetrahyd rofuran
ND
2,2-Dichloropropane
ND
1,2-Dichloroethane
ND
n-Hexane
ND
Diisopropyl ether
ND
tert-Butyl Ethyl Ether
ND
1,2-Dichloroethene (total)
ND
1,1,1-Trichloroethane
ND
1,1-Dichloropropene
ND
Benzene
ND
Carbon tetrachloride
ND
Cyclohexane
ND
tert-Amyl Methyl Ether
ND
ppbV
RL
Serial No:09242016:00
Lab Number: L2036144
Report Date: 09/24/20
Date Collected
Date Received
Field Prep:
09/01 /20 16:00
09/02/20
Not Specified
ug/m3 Dilution
MDL Results RL MDL Qualifier Factor
0.500
ND
1.52 1
0.500
ND
1.74 1
0.200
ND
0.626 1
0.200
ND
0.623 1
0.200
ND
1.53 1
0.200
ND
0.793 1
0.200
ND
0.809 1
0.200
ND
0.721 1
1.00
ND
3.52 1
0.600
ND
0.869 1
0.500
ND
1.47 1
0.200
ND
0.793 1
0.500
ND
1.80 1
0.200
ND
0.977 1
0.500
ND
1.47 1
0.200
ND
0.924 1
0.200
ND
0.809 1
0.200
ND
0.705 1
0.200
ND
0.836 1
0.200
ND
0.836 1
1.00
ND
1.00 1
0.200
ND
1.09 1
0.200
ND
0.908 1
0.200
ND
0.639 1
0.200
ND
1.26 1
0.200
ND
0.688 1
0.200
ND
0.836 1
L\LPHA
Page 34 of 47

Project Name: BATCH CANISTER CERTIFICATION
Project Number: CANISTER QC BAT
Air Canister Certification Results
Lab ID: L2036144-02
Client ID: CAN 722 SHELF 23
Sample Location:
Sample Depth:
Parameter
Results
Volatile Organics in Air - Mansfield Lab
Dibromomethane
ND
1,2-Dichloropropane
ND
Bromodichloromethane
ND
1,4-Dioxane
ND
Trichloroethene
ND
2,2,4-Trimethylpentane
ND
Methyl Methacrylate
ND
Heptane
ND
cis-1,3-Dichloropropene
ND
4-Methyl-2-pentanone
ND
trans- 1,3-Dichloropropene
ND
1,1,2-Trichloroethane
ND
Toluene
ND
1,3-Dichloropropane
ND
2-Hexanone
ND
Dibromochloromethane
ND
1,2-Dibromoethane
ND
Butyl acetate
ND
Octane
ND
Tetrachloroethene
ND
1,1,1,2-Tetrachloroethane
ND
Chlorobenzene
ND
Ethylbenzene
ND
p/m-Xylene
ND
Bromoform
ND
Styrene
ND
1,1,2,2-Tetrachloroethane
ND
ppbV
RL
Serial No:09242016:00
Lab Number: L2036144
Report Date: 09/24/20
Date Collected
Date Received
Field Prep:
09/01 /20 16:00
09/02/20
Not Specified
ug/m3 Dilution
MDL Results RL MDL Qualifier Factor
0.200
ND
1.42 1
0.200
ND
0.924 1
0.200
ND
1.34 1
0.200
ND
0.721 1
0.200
ND
1.07 1
0.200
ND
0.934 1
0.500
ND
2.05 1
0.200
ND
0.820 1
0.200
ND
0.908 1
0.500
ND
2.05 1
0.200
ND
0.908 1
0.200
ND
1.09 1
0.200
ND
0.754 1
0.200
ND
0.924 1
0.200
ND
0.820 1
0.200
ND
1.70 1
0.200
ND
1.54 1
0.500
ND
2.38 1
0.200
ND
0.934 1
0.200
ND
1.36 1
0.200
ND
1.37 1
0.200
ND
0.921 1
0.200
ND
0.869 1
0.400
ND
1.74 1
0.200
ND
2.07 1
0.200
ND
0.852 1
0.200
ND
1.37 1
L\LPHA
Page 35 of 47

Project Name: BATCH CANISTER CERTIFICATION
Project Number: CANISTER QC BAT
Air Canister Certification Results
Lab ID: L2036144-02
Client ID: CAN 722 SHELF 23
Sample Location:
Sample Depth:
Parameter
Results
Volatile Organics in Air - Mansfield Lab
o-Xylene
ND
1,2,3-Trichloropropane
ND
Nonane
ND
Isopropylbenzene
ND
Bromobenzene
ND
2-Chlorotoluene
ND
n-Propylbenzene
ND
4-Chlorotoluene
ND
4-Ethyltoluene
ND
1,3,5-Trimethylbenzene
ND
tert-Butyl benzene
ND
1,2,4-Trimethylbenzene
ND
Decane
ND
Benzyl chloride
ND
1,3-Dichlorobenzene
ND
1,4-Dichlorobenzene
ND
sec-Butylbenzene
ND
p-Isopropyltoluene
ND
1,2-Dichlorobenzene
ND
n-Butylbenzene
ND
1,2-Dibromo-3-chloropropane
ND
Undecane
ND
Dodecane
ND
1,2,4-Trichlorobenzene
ND
Naphthalene
ND
1,2,3-Trichlorobenzene
ND
Hexachlorobutadiene
ND
ppbV
RL
Serial No:09242016:00
Lab Number: L2036144
Report Date: 09/24/20
Date Collected
Date Received
Field Prep:
09/01 /20 16:00
09/02/20
Not Specified
ug/m3 Dilution
MDL Results RL MDL Qualifier Factor
0.200
ND
0.869 1
0.200
ND
1.21 1
0.200
ND
1.05 1
0.200
ND
0.983 1
0.200
ND
0.793 1
0.200
ND
1.04 1
0.200
ND
0.983 1
0.200
ND
1.04 1
0.200
ND
0.983 1
0.200
ND
0.983 1
0.200
ND
1.10 1
0.200
ND
0.983 1
0.200
ND
1.16 1
0.200
ND
1.04 1
0.200
ND
1.20 1
0.200
ND
1.20 1
0.200
ND
1.10 1
0.200
ND
1.10 1
0.200
ND
1.20 1
0.200
ND
1.10 1
0.200
ND
1.93 1
0.200
ND
1.28 1
0.200
ND
1.39 1
0.200
ND
1.48 1
0.200
ND
1.05 1
0.200
ND
1.48 1
0.200
ND
2.13 1
LILPHA
Page 36 of 47

Project Name: BATCH CANISTER CERTIFICATION
Project Number: CANISTER QC BAT
Air Canister Certification Results
Lab ID: L2036144-02
Client ID: CAN 722 SHELF 23
Sample Location:
Sample Depth:
Parameter Results
Volatile Organics in Air - Mansfield Lab
Tentatively Identified Compounds
No Tentatively Identified Compounds
Internal Standard
ppbV
RL
Serial No:09242016:00
Lab Number: L2036144
Report Date: 09/24/20
Date Collected: 09/01/20 16:00
Date Received: 09/02/20
Field Prep: Not Specified
ug/m3 Dilution
MDL Results RL MDL Qualifier Factor
Results Qualifier Units RDL
Acceptance
% Recovery Qualifier Criteria
1,4-Difluorobenzene
90
60-140
Bromochloromethane
137
60-140
chlorobenzene-d5
103
60-140
Dilution
Factor
AUPHA
Page 37 of 47

Project Name: BATCH CANISTER CERTIFICATION
Project Number: CANISTER QC BAT
Air Canister Certification Results
Lab ID:
Client ID:
Sample Location:
Sample Depth:
Matrix:
Anaytical Method:
Analytical Date:
Analyst:
Parameter
L2036144-02
CAN 722 SHELF 23
Air
48,TO-15-SIM
09/03/20 21:45
EW
Results
Volatile Organics in Air
by SIM - Mansfield Lab
Dichlorodifluoromethane
ND
Chloromethane
ND
Freon-114
ND
Vinyl chloride
ND
1,3-Butadiene
ND
Bromomethane
ND
Chloroethane
ND
Acrolein
ND
Acetone
ND
Trichlorofluoromethane
ND
Acrylonitrile
ND
1,1-Dichloroethene
ND
Methylene chloride
ND
Freon-113
ND
trans-1,2-Dichloroethene
ND
1, 1 -Dichloroethane
ND
Methyl tert butyl ether
ND
2-Butanone
ND
cis-1,2-Dichloroethene
ND
Chloroform
ND
1,2-Dichloroethane
ND
1,1,1-Trichooroethane
ND
Benzene
ND
Carbon tetrachloride
ND
Serial No:09242016:00
Lab Number: L2036144
Report Date: 09/24/20
Date Collected
Date Received
Field Prep:
09/01 /20 16:00
09/02/20
Not Specified
ppbV
ug/m3
Dilution
RL MDL
Results
RL
MDL Qualifier Factor
0.200
ND
0.989
1
0.200
ND
0.413
1
0.050
ND
0.349
1
0.020
ND
0.051
1
0.020
ND
0.044
1
0.020
ND
0.078
1
0.100
ND
0.264
1
0.050
ND
0.115
1
1.00
ND
2.38
1
0.050
ND
0.281
1
0.500
ND
1.09
1
0.020
ND
0.079
1
0.500
ND
1.74
1
0.050
ND
0.383
1
0.020
ND
0.079
1
0.020
ND
0.081
1
0.200
ND
0.721
1
0.500
ND
1.47
1
0.020
ND
0.079
1
0.020
ND
0.098
1
0.020
ND
0.081
1
0.020
ND
0.109
1
0.100
ND
0.319
1
0.020
ND
0.126
1
L\LPHA
Page 38 of 47

Serial No:09242016:00
Project Name: BATCH CANISTER CERTIFICATION Lab Number: L2036144
Project Number: CANISTER QC BAT Report Date: 09/24/20
Air Canister Certification Results
Lab ID:
L2036144-02
Date Collected:
09/01/20 16:00
Client ID:
CAN 722 SHELF 23
Date Received:
09/02/20
Sample Location:
Field Prep:
Not Specified
Sample Depth:
ppbV
ug/m3
Dilution
Parameter
Results
RL MDL
Results
RL MDL Qualifier
Factor
Volatile Organics in Air by SIM - Mansfield Lab
1,2-Dichloropropene
ND
0.020
ND
0.092
1
Bromodichloromethane
ND
0.020
ND
0.134
1
1,4-Dioxane
ND
0.100
ND
0.360
1
Trichloroethene
ND
0.020
ND
0.107
1
cis-1,3-Dichloropropene
ND
0.020
ND
0.091
1
4-Methyl-2-pentanone
ND
0.500
ND
2.05
1
trans- 1,3-Dichloropropene
ND
0.020
ND
0.091
1
1,1,2-Trichloroethane
ND
0.020
ND
0.109
1
Toluene
ND
0.050
ND
0.188
1
Dibromochloromethane
ND
0.020
ND
0.170
1
1,2-Dibromoethane
ND
0.020
ND
0.154
1
Tetrachloroethene
ND
0.020
ND
0.136
1
1,1,1,2-Tetrachloroethane
ND
0.020
ND
0.137
1
Chlorobenzene
ND
0.100
ND
0.461
1
Ethylbenzene
ND
0.020
ND
0.087
1
p/m-Xylene
ND
0.040
ND
0.174
1
Bromoform
ND
0.020
ND
0.207
1
Styrene
ND
0.020
ND
0.085
1
1,1,2,2-Tetrachloroethane
ND
0.020
ND
0.137
1
o-Xylene
ND
0.020
ND
0.087
1
Isopropylbenzene
ND
0.200
ND
0.983
1
4-Ethyltoluene
ND
0.020
ND
0.098
1
1,3,5-Trimethybenzene
ND
0.020
ND
0.098
1
1,2,4-Trimethylbenzene
ND
0.020
ND
0.098
1
Benzyl chloride
ND
0.200
ND
1.04
1
1,3-Dichlorobenzene
ND
0.020
ND
0.120
1
1,4-Dichlorobenzene
ND
0.020
ND
0.120
1
L\LPHA
Page 39 of 47

Serial No:09242016:00
Project Name: BATCH CANISTER CERTIFICATION Lab Number: L2036144
Project Number: CANISTER QC BAT Report Date: 09/24/20
Air Canister Certification Results
Lab ID: L2036144-02
Date Collected:
09/01/20 16:00
Client ID: CAN 722 SHELF 23
Date Received:
09/02/20
Sample Location:
Field Prep:
Not Specified
Sample Depth:
ppbV
ug/m3
Dilution
Parameter
Results
RL
MDL Results
RL MDL Qualifier
Factor
Volatile Organics in Air by SIM - Mansfield Lab
sec-Butylbenzene
ND
0.200
ND
1.10
1
p-Isopropyltoluene
ND
0.200
ND
1.10
1
1,2-Dichlorobenzene
ND
0.020
ND
0.120
1
n-Butylbenzene
ND
0.200
ND
1.10
1
1,2,4-Trichlorobenzene
ND
0.050
ND
0.371
1
Naphthalene
ND
0.050
ND
0.262
1
1,2,3-Trichlorobenzene
ND
0.050
ND
0.371
1
Hexachlorobutadiene
ND
0.050
ND
0.533
1
Acceptance
Internal Standard
% Recovery
Qualifier
Criteria
1,4-difluorobenzene
90
60-140
bromochloromethane
137
60-140
chlorobenzene-d5
102
60-140
L\LPHA
Page 40 of 47

O c.0
O
O
N
O
� M
�
N
O
J
�
O
O �
�
O �
�
zl
Z
O
(n J
y
o
Cl)
J
0
M
J
0
M
J
0
M
J
R
J
J
J
J
Q
0
o
o
0
CN
N
E lz
O
�
w
N
N
N
W
a
¢
a
a
a
O
v
V
'a
G
cn
N
O
C
N
C
N
=
_
z
z
z
z
y
W
O
z
�
>
Vz
z
z
Cl.
0
U
W
CL
U
Q
�
CO�
E
Q
O
N
U
jl-
o
O
U
a
J
J
J
J
O
m
�
(M
00
��,
O
m
m
m
m
G1
d
Q
cn
10
O
4.
E
� o
z
z
p
40
¢
¢
=
o
0
0
0
C�
C1
Q-
�
N
� .R
m
cD
m
m
O
i
s
a)
O
O
Q
= =
O O
Cl)M
0
0
M
o
Cl)
0
z
U U
J
J
J
J
IL

Serial No:09242016:00
Project Name: BLOC 83 GARAGE Lab Number: L2039161
Project Number: 35200786 Report Date: 09/24/20
GLOSSARY
Acronyms
DL Detection Limit: This value represents the level to which target analyte concentrations are reported as estimated values, when
those target analyte concentrations are quantified below the limit of quantitation (LOQ). The DL includes any adjustments
from dilutions, concentrations or moisture content, where applicable. (DoD report formats only.)
EDL Estimated Detection Limit: This value represents the level to which target analyte concentrations are reported as estimated
values, when those target analyte concentrations are quantified below the reporting limit (RL). The EDL includes any
adjustments from dilutions, concentrations or moisture content, where applicable. The use of EDLs is specific to the analysis
of PAHs using Solid -Phase Microextraction (SPME).
EMPC Estimated Maximum Possible Concentration: The concentration that results from the signal present at the retention time of an
analyte when the ions meet all of the identification criteria except the ion abundance ratio criteria. An EMPC is a worst -case
estimate of the concentration.
EPA Environmental Protection Agency.
LCS Laboratory Control Sample: A sample matrix, free from the analytes of interest, spiked with verified known amounts of
analytes or a material containing known and verified amounts of analytes.
LCSD Laboratory Control Sample Duplicate: Refer to LCS.
LFB Laboratory Fortified Blank: A sample matrix, free from the analytes of interest, spiked with verified known amounts of
analytes or a material containing known and verified amounts of analytes.
LOD Limit of Detection: This value represents the level to which a target analyte can reliably be detected for a specific analyte in a
specific matrix by a specific method. The LOD includes any adjustments from dilutions, concentrations or moisture content,
where applicable. (DoD report formats only.)
LOQ Limit of Quantitation: The value at which an instrument can accurately measure an analyte at a specific concentration. The
LOQ includes any adjustments from dilutions, concentrations or moisture content, where applicable. (DoD report formats
only.)
Limit of Quamitation: The value at which an instrument can accurately measure an analyte at a specific concentration. The
LOQ includes any adjustments from dilutions, concentrations or moisture content, where applicable. (DoD report formats
only.)
MDL Method Detection Limit: This value represents the level to which target analyte concentrations are reported as estimated
values, when those target analyte concentrations are quantified below the reporting limit (RL). The MDL includes any
adjustments from dilutions, concentrations or moisture content, where applicable.
MS Matrix Spike Sample: A sample prepared by adding a known mass of target analyte to a specified amount of matrix sample for
which an independent estimate of target analyte concentration is available. For Method 332.0, the spike recovery is calculated
using the native concentration, including estimated values.
MSD Matrix Spike Sample Duplicate: Refer to MS.
NA Not Applicable.
NC Not Calculated: Term is utilized when one or more of the results utilized in the calculation are non -detect at the parameter's
reporting unit.
NDPA/DPA - N-Nitrosodiphenylamine/Diphenylamine.
NI Not Ignitable.
NP Non -Plastic: Term is utilized for the analysis of Atterberg Limits in soil.
RL Reporting Limit: The value at which an instrument can accurately measure an analyte at a specific concentration. The RL
includes any adjustments from dilutions, concentrations or moisture content, where applicable.
RPD Relative Percent Difference: The results from matrix and/or matrix spike duplicates are primarily designed to assess the
precision of analytical results in a given matrix and are expressed as relative percent difference (RPD). Values which are less
than five times the reporting limit for any individual parameter are evaluated by utilizing the absolute difference between the
values; although the RPD value will be provided in the report.
SRM Standard Reference Material: A reference sample of a known or certified value that is of the same or similar matrix as the
associated field samples.
STLP Semi -dynamic Tank Leaching Procedure per EPA Method 1315.
TEF Toxic Equivalency Factors: The values assigned to each dioxin and furan to evaluate their toxicity relative to 2,3,7,8-TCDD.
TEQ Toxic Equivalent: The measure of a sample's toxicity derived by multiplying each dioxin and furan by its corresponding TEF
and then summing the resulting values.
TIC Tentatively Identified Compound: A compound that has been identified to be present and is not part of the target compound
list (TCL) for the method and/or program. All TICs are qualitatively identified and reported as estimated concentrations.
Footnotes
Report Format: Data Usability Report
Page 42 of 47

Serial No:09242016:00
Project Name: BLOC 83 GARAGE Lab Number: L2039161
Project Number: 35200786 Report Date: 09/24/20
l The reference for this analyte should be considered modified since this analyte is absent from the target analyte list of the
original method.
Terms
Analytical Method: Both the document from which the method originates and the analytical reference method. (Example: EPA 8260B is
shown as 1,8260B.) The codes for the reference method documents are provided in the References section of the Addendum.
Difference: With respect to Total Oxidizable Precursor (TOP) Assay analysis, the difference is defined as the Post -Treatment value minus the
Pre -Treatment value.
Final pH: As it pertains to Sample Receipt & Container Information section of the report, Final pH reflects pH of container determined after
adjustment at the laboratory, if applicable. If no adjustment required, value reflects Initial pH.
Frozen Date/Time: With respect to Volatile Organics in soil, Frozen Date/Time reflects the date/rime at which associated Reagent Water -
preserved vials were initially frozen. Note: If frozen date/time is beyond 48 hours from sample collection, value will be reflected in 'bold'.
Initial pH: As it pertains to Sample Receipt & Container Information section of the report, Initial pH reflects pH of container determined upon
receipt, if applicable.
PAH Total: With respect to Alkylated PAH analyses, the 'PAHs, Total' result is defined as the summation of results for all or a subset of the
following compounds: Naphthalene, C1-C4 Naphthalenes, 2-Methylnaphthalene, 1-Methylnaphthalene, Biphenyl, Acenaphthylene,
Acenaphthene, Fluorene, C1-C3 Fluorenes, Phenanthrene, C1-C4 Phenanthrenes/Anthracenes, Anthracene, Fluoranthene, Pyrene, C1-C4
Fluoranthenes/Pyrenes, Benz(a)anthracene, Chrysene, Cl-C4 Chrysenes, Benzo(b)fluoranthene, Benzoo)+(k)fluoranthene, Benzo(e)pyrene,
Benzo(a)pyrene, Perylene, Indeno(1,2,3-cd)pyrene, Dibenz(ah)+(ac)anthracene, Benzo(g,h,i)perylene. If a'Total' result is requested, the
results of its individual components will also be reported.
PFAS Total: With respect to PFAS analyses, the 'PFAS, Total (5)' result is defined as the summation of results for: PFHpA, PFHxS, PFOA,
PFNA and PFOS. If a'Total' result is requested, the results of its individual components will also be reported.
The target compound Chlordane (CAS No. 57-74-9) is reported for GC ECD analyses. Per EPA,this compound "refers to a mixture of
chlordane isomers, other chlorinated hydrocarbons and numerous other components." (Reference: USEPA Toxicological Review of
Chlordane, In Support of Summary Information on the Integrated Risk Information System (IRIS), December 1997.)
Total: With respect to Organic analyses, a'Total' result is defined as the summation of results for individual isomers or Aroclors. If a'Total'
result is requested, the results of its individual components will also be reported. This is applicable to 'Total' results for methods 8260, 8081
and 8082.
Data Qualifiers
A Spectra identified as "Aldol Condensates" are byproducts of the extraction/concentration procedures when acetone is introduced in
the process.
B The analyte was detected above the reporting limit in the associated method blank. Flag only applies to associated field samples that
have detectable concentrations of the analyte at less than ten times (1 Ox) the concentration found in the blank. For MCP -related
projects, flag only applies to associated field samples that have detectable concentrations of the analyte at less than ten times (I Ox)
the concentration found in the blank. For DOD -related projects, flag only applies to associated field samples that have detectable
concentrations of the analyte at less than ten times (1 Ox) the concentration found in the blank AND the analyte was detected above
one-half the reporting limit (or above the reporting limit for common lab contaminants) in the associated method blank. For NJ -
Air -related projects, flag only applies to associated field samples that have detectable concentrations of the analyte above the
reporting limit. For NJ -related projects (excluding Air), flag only applies to associated field samples that have detectable
concentrations of the analyte, which was detected above the reporting limit in the associated method blank or above five times the
reporting limit for common lab contaminants (Phthalates, Acetone, Methylene Chloride, 2-Butanone).
C Co -elution: The target analyte co -elutes with a known lab standard (i.e. surrogate, internal standards, etc.) for co -extracted
analyses.
D Concentration of analyte was quantified from diluted analysis. Flag only applies to field samples that have detectable concentrations
of the analyte.
E Concentration of analyte exceeds the range of the calibration curve and/or linear range of the instrument.
F The ratio of quantifier ion response to qualifier ion response falls outside of the laboratory criteria. Results are considered to be an
estimated maximum concentration.
G The concentration may be biased high due to matrix interferences (i.e, co -elution) with non -target compound(s). The result should
be considered estimated.
H The analysis of pH was performed beyond the regulatory -required holding time of 15 minutes from the time of sample collection.
I The lower value for the two columns has been reported due to obvious interference.
J Estimated value. This represents an estimated concentration for Tentatively Identified Compounds (TICS).
M Reporting Limit (RL) exceeds the MCP CAM Reporting Limit for this analyte.
ND Not detected at the reporting limit (RL) for the sample.
NJ Presumptive evidence of compound. This represents an estimated concentration for Tentatively Identified Compounds (TICS), where
the identification is based on a mass spectral library search.
P The RPD between the results for the two columns exceeds the method -specified criteria.
Q The quality control sample exceeds the associated acceptance criteria. For DOD -related projects, LCS and/or Continuing Calibration
Report Format: Data Usability Report
Page 43 of 47

Serial No:09242016:00
Project Name: BLOC 83 GARAGE Lab Number: L2039161
Project Number: 35200786 Report Date: 09/24/20
Data Qualifiers
Standard exceedences are also qualified on all associated sample results. Note: This flag is not applicable for matrix spike recoveries
when the sample concentration is greater than 4x the spike added or for batch duplicate RPD when the sample concentrations are less
than 5x the RL. (Metals only.)
R - Analytical results are from sample re -analysis.
RE Analytical results are from sample re -extraction.
S Analytical results are from modified screening analysis.
Report Format: Data Usability Report
Page 44 of 47

Project Name: BLOC 83 GARAGE
Project Number: 35200786
Serial No:09242016:00
Lab Number: L2039161
Report Date: 09/24/20
REFERENCES
48 Compendium of Methods for the Determination of Toxic Organic Compounds in Ambient
Air. Second Edition. EPA/625/R-96/010b, January 1999.
LIMITATION OF LIABILITIES
Alpha Analytical performs services with reasonable care and diligence normal to the analytical testing
laboratory industry. In the event of an error, the sole and exclusive responsibility of Alpha Analytical
shall be to re -perform the work at it's own expense. In no event shall Alpha Analytical be held liable
for any incidental, consequential or special damages, including but not limited to, damages in any way
connected with the use of, interpretation of, information or analysis provided by Alpha Analytical.
We strongly urge our clients to comply with EPA protocol regarding sample volume, preservation, cooling,
containers, sampling procedures, holding time and splitting of samples in the field.
LILPHA
Page 45 of 47

Serial No:09242016:00
Alpha Analytical, Inc. ID No.:17873
Facility: Company -wide Revision 17
Department: Quality Assurance Published Date: 4/28/2020 9:42:21 AM
Title: Certificate/Approval Program Summary Page 1 of 1
Certification Information
The following analytes are not included in our Primary NELAP Scope of Accreditation:
Westborough Facility
EPA 624/624.1: m/p-xylene, o-xylene, Naphthalene
EPA 8260C: NPW: 1,2,4,5-Tetramethylbenzene; 4-Ethyltoluene, Azobenzene; SCM: lodomethane (methyl iodide), 1,2,4,5-Tetramethylbenzene; 4-
Ethyltoluene.
EPA 8270D: NPW: Dimethylnaphthalene,1,4-Diphenylhydrazine; SCM: Dimethylnaphthalene,1,4-Diphenylhydrazine.
SM4500: NPW: Amenable Cyanide; SCM: Total Phosphorus, TKN, NO2, NO3.
Mansfield Facility
SM 254OD: TSS
EPA 8082A: NPW: PCB: 1, 5, 31, 87,101, 110, 141, 151, 153, 180, 183, 187.
EPA TO-15: Halothane, 2,4,4-Trimethyl-2-pentene, 2,4,4-Trimethyl- 1-pentene, Thiophene, 2-Methylthiophene,
3-Methylthiophene, 2-Ethylthiophene, 1,2,3-Trimethylbenzene, Indan, Indene, 1,2,4,5-Tetramethylbenzene, Benzothiophene, 1-Methylnaphthalene.
EPA TO-12 Non -methane organics
EPA 3C Fixed gases
Biological Tissue Matrix: EPA 3050E
The following analytes are included in our Massachusetts DEP Scope of Accreditation
Westborough Facility:
Drinking Water
EPA 300.0: Chloride, Nitrate-N, Fluoride, Sulfate; EPA 353.2: Nitrate-N, Nitrite-N; SM4500NO3-F: Nitrate-N, Nitrite-N; SM4500E-C, SM4500CN-CE,
EPA 180.1, SM2130B, SM4500C1-D, SM2320B, SM2540C, SM4500H-B, SM450ONO2-B
EPA 332: Perchlorate; EPA 524.2: THMs and VOCs; EPA 504.1: EDB, DBCP.
Microbiology: SM9215B; SM9223-P/A, SM9223B-Colilert-QT,SM9222D.
Non -Potable Water
SM4500H,B, EPA 120.1, SM2510B, SM2540C, SM2320B, SM4500CL-E, SM4500E-BC, SM4500NH3-BH: Ammonia-N and Kjeldahl-N, EPA 350.1:
Ammonia-N, LACHAT 10-107-06-1-B: Ammonia-N, EPA 351.1, SM4500NO3-F, EPA 353.2: Nitrate-N, SM4500P-E, SM4500P-B, E, SM4500SO4-E,
SM522013, EPA 410.4, SM5210B, SM5310C, SM4500CL-D, EPA 1664, EPA 420.1, SM4500-CN-CE, SM254013, EPA 300: Chloride, Sulfate, Nitrate.
EPA 624.1: Volatile Halocarbons & Aromatics,
EPA 608.3: Chlordane, Toxaphene, Aldrin, alpha-BHC, beta-BHC, gamma-BHC, delta-BHC, Dieldrin, DDD, DDE, DDT, Endosulfan I, Endosulfan II,
Endosulfan sulfate, Endrin, Endrin Aldehyde, Heptachlor, Heptachlor Epoxide, PCBs
EPA 625.1: SVOC (Acid/Base/Neutral Extractables), EPA 600/4-81-045: PCB -Oil.
Microbiology: SM9223B-Colilert-QT; Enterolert-QT, SM9221E, EPA 1600, EPA 1603.
Mansfield Facility:
Drinking Water
EPA 200.7: Al, Ba, Cd, Cr, Cu, Fe, Mn, Ni, Na, Ag, Ca, Zn. EPA 200.8: Al, Sb, As, Ba, Be, Cd, Cr, Cu, Pb, Mn, Ni, Se, Ag, TL, Zn. EPA 245.1 Hg.
EPA 522.
Non -Potable Water
EPA 200.7: Al, Sb, As, Be, Cd, Ca, Cr, Co, Cu, Fe, Pb, Mg, Mn, Mo, Ni, K, Se, Ag, Na, Sr, TL, Ti, V, Zn.
EPA 200.8: Al, Sb, As, Be, Cd, Cr, Cu, Fe, Pb, Mn, Ni, K, Se, Ag, Na, TL, Zn.
EPA 245.1 Hg.
SM2340B
For a complete listing of analytes and methods, please contact your Alpha Project Manager.
Document Type: Form
Page 46 of 47
Pre-Qualtrax Document ID: 08-113

a
a
5
r�s
5 � cri
'
U
nn
nn
v � N
E ru c
Z
J sp
CL
i a a # ;� c
LL 'r m
D
C
i
+ Y 1 l
LL
LL
E
o
r4
w
i--
ti
a 'S
� m
E
C
rn
O
ry
1 O
x +S
V
C]
� EL
k LU
a
r
JA
� L-