25054-Mt Gilead-Post-Occupancy Report-20240319

11hHan1ey
1 ■ Environmental
Engineering & Consulting
March 19, 2024
Samuel P. Watson
Project Manager
Brownfields Property Management Branch
North Carolina Department of Environmental Quality
Hanley Environmental, PLLC
323 Manning Drive
Charlotte, North Carolina 28209
NC Engineering License P-2407
T: [phone]
www.hanleyenvironmental.com
Subject: VIMS Post -Occupancy Monitoring Report
Mt. Gilead Cotton Oil Company Brownfields Property
Mt. Gilead, Montgomery County, North Carolina
Brownfields Project No. 25054-21-062
Hanley Environmental Project Number: PJ22017
Dear Samuel Watson,
On behalf of Mt Gilead DG, LLC, Hanley Environmental, PLLC is pleased to provide the
enclosed Vapor Intrusion Mitigation System (VIMS) Post -Occupancy Monitoring Report for
the Mt. Gilead Cotton Oil Company Brownfields Property located in Mt. Gilead, Montgomery
County, North Carolina.
Please do not hesitate to contact the undersigned with any questions regarding this
submittal.
Sincerely,
Joe Gentilcore
Environmental Scientist
David Hanley, PE
Principal Engineer

VAPOR INTRUSION MITIGATION
SYSTEM POST -OCCUPANCY
MONITORING REPORT
Mt. Gilead Cotton Oil Company Brownfields Property
Mt. Gilead, Montgomery County, North Carolina
Brownfields Project No. 25054-21-062
Project Number: PJ22017
March 19, 2024
Prepared for:
Mt Gilead DG, LLC
Hanley Environmental, PLLC
323 Manning Drive
Charlotte, North Carolina 28209
NC Engineering License P-2407
T: [phone]
www.hanleyenvironmental.com
,04at 14 CA ►pp� �•,,
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1 ■ Hanley
IF Environmental
Engineering & Consulting

VIMS Post -Occupancy Monitoring Report
Mt. Gilead Cotton Oil Company Brownfields Property
TABLE OF CONTENTS
TABLE OF CONTENTS
1.0 INTRODUCTION
2.0 ASSESSMENT PROCEDURES
3.0 ASSESSMENT RESULTS
4.0 VIMS INSPECTION
5.0 CONCLUSION
6.0 REFERENCES
,1 ■ Hanley
1 ■ EnvirOnmental
Engineering & Consulting
1
1
2
4
4
6

VIMS Post -Occupancy Monitoring Report
Mt. Gilead Cotton Oil Company Brownfields Property
List of Figures
Figure 1 Site Vicinity Map
List of Tables
Table 1 Sub -Slab Analytical Data Summary
List of Appendices
,1 ■ Hanley
1 ■ Enviranmental
Engineering & Consulting
Appendix A Vapor Intrusion Mitigation System As -Built -Above Slab Layout
Appendix B
Laboratory Analytical Report
Appendix C
Risk Calculator Output
Appendix D
VIMS Inspection Checklist

VIMS Post -Occupancy Monitoring Report ,1\Hanley
Mt. Gilead Cotton Oil Company Brownfields Property 1■Enviranmental
Engineering & Consulting
1.0 INTRODUCTION
This Vapor Intrusion Mitigation System (VIMS) Post -Occupancy Monitoring Report
documents sub -slab soil gas sampling performed following building occupancy at the Dollar
General building at the Mt. Gilead Cotton Oil Company Brownfields Property (Site ID 25054-
21-062) in Mt. Gilead, Montgomery County, North Carolina (the site). The site is located at
299 Industry Avenue and 0 South Wadesboro Boulevard and consists of two parcels (parcel
IDs 6593-12-95-4641 and 6593-12-95-3728) with a total area of 3.55 acres. A map depicting
the site vicinity is included as Figure 1. Sampling was performed pursuant to the Vapor
Intrusion Mitigation System (VIMS) Design Report - Revision 2 dated June 29, 2022, VIMS
Design Addendum #1 dated July 29, 2022, and VIMS Installation Report dated December 9,
2022.
Initial post -occupancy sub -slab soil gas sampling was completed on May 8, 2023, and is
documented in the VIMS Post -Occupancy Monitoring Report dated May 22, 2023. Based on
the results of the initial post -occupancy sampling event, the North Carolina Department of
Environmental Quality (NCDEQ) Brownfields Redevelopment Section (BRS) requested a
minimum of one additional post -occupancy sampling event in a letter dated February 8,
2024, to evaluate if sub -slab soil gas concentration trends have stabilized. This report
documents the procedures and results of the second post -occupancy monitoring event.
2.0 ASSESSMENT PROCEDURES
Four sub -slab soil gas samples were collected (one from each vacuum monitoring point
[VMP]) on February 15, 2024, approximately nine months following completion of initial post -
occupancy monitoring. In addition, one duplicate sample was collected from VMP-2.
Sampling was performed pursuant to procedures in the NCDEQ Division of Waste
Management (DWM) Vapor Intrusion Guidance dated March 2018. A VIMS As -Built - Above
Slab Layout depicting the locations of the VMPs is provided as Appendix A.
1

VIMS Post -Occupancy Monitoring Report ,1\Hanley
Mt. Gilead Cotton Oil Company Brownfields Property 1■Enviranmental
Engineering & Consulting
Sum ma° canisters individually certified by the laboratory with 1.4-liter volumes were used to
collect sub -slab soil gas samples. Canisters were inspected prior to sampling to verify that
vacuum levels were within 10% of the level recorded by the laboratory prior to shipment.
Dedicated tubing and flow controllers were used at each VMP. Each VMP was sampled by
connecting Teflon° tubing to the VMP.
Vacuum shut-in testing was performed at each sample location by closing a valve on the
sample train to prevent airflow from the VMP to the sample train. The valve on the summa
canister was then opened to confirm no vacuum losses occurred in the sample train.
A minimum of three sample train volumes of air were purged from each sample point prior
to sampling. During purging, the sample canister, tubing, and sample point were surrounded
with a shroud consisting of a plastic container. The shroud was filled with helium to
concentrations ranging from 12.6% to 14.9% as measured using a Dielectric MGD 2002
helium detector. Purged vapors were collected in Tedlar° bags using a syringe and three-way
valve. The helium concentration of the vapor in the Tedlar° bags was measured. Final helium
concentrations in the Tedlar° bags were less than 10% of the helium concentration in the
shroud, which was considered an acceptable result.
Following purging and leak testing, a soil gas sample was collected into the sample canister
at an approximate flow rate of 200 mL/min. Final canister vacuum levels of 6 inches of
mercury (in Hg) were recorded at the end of sample collection. After sampling, the canisters
were transported under chain -of -custody protocols to Waypoint Analytical Laboratory in
Charlotte, North Carolina. The soil gas samples were analyzed for VOCs by EPA Method TO-
15 for compounds previously detected in site soil gas, groundwater, and soil.
3.0 ASSESSMENT RESULTS
Laboratory analytical results are summarized in Table 1, and the analytical laboratory report
with chain of custody is provided as Appendix B. The results were compared to the NCDEQ
DWM Non -Residential Sub -Slab and Exterior Soil Gas Screening Levels (SGSLs) dated
2

VIMS Post -Occupancy Monitoring Report ,1\Hanley
Mt. Gilead Cotton Oil Company Brownfields Property 1■Enviranmental
Engineering & Consulting
February 2024. Analytical results indicated the presence of several VOCs at concentrations
above laboratory method detection limits in each sample. However, concentrations of
detected compounds were below their respective NCDEQ Non -Residential SGSLs.
SGSLs are conservative screening levels for individual compounds that are based on a
lifetime incremental cancer risk (LICR) of 10-6 for potential carcinogenic effects and hazard
index of 0.2 for potential non -carcinogenic effects. To further evaluate cumulative risk posed
by detected compounds, Hanley Environmental used NCDEQ's Risk Calculator (February
2024 version). As a conservative approach, the highest concentration of each compound
detected in samples was input into the risk calculator for a non-residential use scenario.
The NCDEQ acceptable risk threshold for potential carcinogenic risks is 10-4 and the
acceptable level for non -carcinogenic risk is a hazard index less than 1. Risk calculator results
indicated a calculated carcinogenic LICR of 2.6 x 10-7 and a calculated non -carcinogenic
hazard index of 0.0014, which were below acceptable risk thresholds. A copy of the Risk
Calculator output is included as Appendix C.
It should be noted that the NCDEQ Risk Calculator uses an attenuation factor of 0.01 for the
non-residential calculator to predict indoor air concentrations from soil gas data. This
attenuation factor is based on the equations specified on the EPA Vapor Intrusion Screening
Level (VISE) Calculator using NCDEQ-approved default parameters and does not account for
the presence of a vapor intrusion mitigation barrier and venting system. Therefore, the vapor
intrusion risk calculations for the on -site building should be considered very conservative
and are not indicative of actual vapor intrusion risk to building occupants. If sub -slab risk
results suggested a possible vapor intrusion concern, indoor air sampling could be
performed to evaluate vapor intrusion risk to occupants.
An evaluation of trends sub -slab soil gas data reveals that concentrations detected in the
most recent sampling event were generally lower or of a similar magnitude to concentrations
in samples from corresponding locations in the previous sampling event. The calculated LICR
3

VIMS Post -Occupancy Monitoring Report ,1\Hanley
Mt. Gilead Cotton Oil Company Brownfields Property 1■Enviranmental
Engineering & Consulting
and hazard index were lower than the previous sampling event. Notably, tetrachloroethylene
(PCE) concentrations were lower compared to the previous sampling event, and
trichloroethylene (TCE) was not detected during this sampling event. One compound,
tetrahydrofuran, had higher concentrations at each sample location compared to the
previous sampling event. This compound is commonly found in PVC cement and was likely
used on sub -slab plumbing, which may be contributing to sub -slab soil gas concentrations.
The highest detected concentration of tetrahydrofuran (133 micrograms per cubic meter
fag/m3) is three orders of magnitude below its Non -Residential SGSL (180,000 fag/m3).
4.0 VIMS INSPECTION
Hanley Environmental completed an inspection of the VIMS and building components and
evaluated property use on February 15, 2024. The inspection was performed according to
operation and maintenance procedures listed in the VIMS Installation Report. The inspection
included a visual observation of VIMS components and building conditions to verify
conformance with the system design. An inspection checklist is provided as Appendix D. The
inspection did not identify issues requiring repair or modification with the exception of one
deteriorating exhaust riser label on riser R4 which was replaced following the inspection.
5.0 CONCLUSION
Four sub -slab soil gas samples were collected (one from each VMP) on February 15, 2024,
approximately nine months following initial post -occupancy monitoring. Analytical results
indicated the presence of several VOCs at concentrations above laboratory method
detection limits in each sample. However, concentrations of detected compounds were
below their respective NCDEQ Non -Residential SGSLs. Conservative risk calculator results
indicated a calculated carcinogenic LICR of 2.6 x 10-7 and a calculated non -carcinogenic
hazard index of 0.0014, which were below acceptable risk thresholds. Detected VOC
concentrations have generally decreased or stabilized when compared to the previous
sampling event with the exception of tetrahydrofuran, a compound commonly found in
building construction materials including PVC cement. PCE concentrations were lower
0

VIMS Post -Occupancy Monitoring Report ,1\Hanley
Mt. Gilead Cotton Oil Company Brownfields Property 1■Enviranmental
Engineering & Consulting
compared to the previous sampling event, and TCE was not detected during this sampling
event.
Following sample completion, Hanley Environmental completed an inspection of the VIMS
and building components to verify conformance with the system design.
Based on pre- and post -occupancy monitoring results, the Prospective Developer requests
the Brownfields Redevelopment Section's approval to discontinue future sampling. VIMS
operation and maintenance will continue as specified in the VIMS Installation Report.
5

VIMS Post -Occupancy Monitoring Report ,1\Hanley
Mt. Gilead Cotton Oil Company Brownfields Property 1■Enviranmental
Engineering & Consulting
6.0 REFERENCES
Hanley Environmental, PLLC, VIMS Design Report- Revision 2, Mt. Gilead Cotton Oil Company,
June 29, 2022.
Hanley Environmental, PLLC, VIMS Design Addendum #1, Mt. Gilead Cotton Oil Company, July
29, 2022.
Hanley Environmental, PLLC, VIMS Installation Report, Mt. Gilead Cotton Oil Company,
December 9, 2022.
Hanley Environmental, PLLC, VIMS Post -Occupancy Monitoring Report, Mt. Gilead Cotton Oil
Company, May 22, 2023.
NCDEQ Division of Waste Management Vapor Intrusion Guidance dated March 2018.
9

FIGURE

G
N
Notes:
1. Basemap: USGS Topographic Map
Site"L�acAgn� �� ` �•
•7 � r
0
0 2,000 4,000 ft
Site Vicinity Map
Mt. Gilead Cotton Oil Company Brownfields Property
o Mt. Gilead, Montgomery County, North Carolina
f 1■ Hanley Figure
��• ,1 ■ Environmental
Engineering & Consulting
PJ22017 May 2022

TABLE

Table 1
Sub -Slab Soil Gas Analytical Data Summary
Mt. Gilead Cotton Oil Company Brownfields Property
Brownfields Project Number 25054-21-062
Sample ID
VMP-1
VMP-2 / DUP-2
VMP-3 / DUP-1
VMP-4
Sample Type
Sub -Slab
Sub -Slab
Sub -Slab
Sub -Slab
Location/Building
North Portion
East Portion
South Portion
West Portion
Sample Duration
5-minute
10-minute
5-minute
5-minute
10-minute
5-minute
5-minute
10-minute
5-minute
5-minute
10-minute
5-minute
Sample Collection Date
11/23/2022
5/8/2023
2/15/2024
11/23/2022
5/8/2023
2/15/2024
11/23/2022
5/8/2023
2/15/2024
11/23/2022
5/8/2023
2/15/2024
Shroud Helium Concentration (%)
28.4%
18.3%
13.0%
28.1 %
23.3%
14.9%
30.1 %
22.7%
12.6%
21.7%
40.1 %
14.0%
Leak Check Helium Concentration (ppm)
50
0
0
25
0
0
0
5,050
0
25
0
0
NCDEQ
Non -Residential
SGSL
(TCR = 1.0E-06;
TH Q=0.2)
Volatile Organic Compounds (VOCs) - EPA Method TO-15 (Ng/m3)
Acetone
Not Listed
27.5
187
12.8
15.6
85.0
5.48
5.63
44.2
113
113
15.7
46.0
13.8 B
39.8
Benzene
1.6E+02
5.40
2.27 B
0.798 J
0.872 J
2.00 B
0.261 J
0.265 J
6.90
1.72
1.70 B
2.19
2.12
1.62 B
0.888 J
Carbon disu If de
6.1 E+04
2.79 B J
3.90 B J
0.706 J
3.40 B J
8.96
0.803 J
0.769 J
1.99 B J
6.85
7.73
0.526 J
1.97 B J
7.20
0.747 J
Carbon tetrachloride
2.0E+02
<0.155
<0.155
<0.155
<0.155
<0.155
<0.155
<0.155
<0.155
<0.155
0.874 J
1.35 J
<0.155
<0.155
<0.155
Chloroform
5.3E+01
4.29
5.50
1.981
1.73J
50.3
6.29
6.15
<0.0864
3.87
3.94
1.12J
2.71
11.0
12.1
Chloromethane
7.9E+03
0.465 J
<0.067
<0.067
<0.0673
<0.067
<0.067
<0.067
<0.0673
<0.067
0.693 J
<0.067
<0.0673
<0.067
<0.067
DichIorodifluoromethane
8.8E+03
2.76
3.12
2.321
2.86
2.82
2.151
2.31J
2.83
2.80
2.82
2.391
2.67
2.80
2.38J
cis-1,2-Dichloroethene
3.5E+03
<0.0955
1 <0.095
<0.095
<0.0955
1 <0.095
<0.095
<0.095
1 <0.0955
<0.095
<0.095
1 <0.095
<0.0955
<0.095
<0.095
trans-1,2-Dichloroethene
3.5E+03
<0.108
<0.108
<0.108
<0.108
<0.108
<0.108
<0.108
<0.108
<0.108
<0.108
<0.108
<0.108
<0.108
<0.108
Ethanol
Not Listed
70.0
499
148
55.9
114
11.0
11.5
40.5
280
366
203
64.7
26.0
1,260
Ethylbenzene
4.9E+02
12.3
4.12
0.581 J
11.7
4.43
<0.106
<0.106
31.7
4.17
4.23
4.58
3.59
1.54 J
0.903 J
4-Ethyltoluene
Not Listed
3.56
5.75
<0.128
0.742 J
5.95
<0.128
<0.128
4.19
5.14
5.20
0.516 J
0.516 J
4.99
<0.128
n-Heptane
3.5E+04
5.32
6.73
0.635 J
7.64
9.72
<0.143
<0.143
33.2
4.41
4.36
4.71
3.19
3.40
5.52
n-Hexane
6.1 E+04
7.22
12.0
1.14 J
2.36
7.13
0.429 J
0.592 J
23.4
8.66
8.84
10.5
8.48
6.22
4.99
2-Butanone (MEK)
4.4E+05
4.54
7.72
7.24
4.85
8.43
2.83
2.51
13.5
6.88
5.57
8.61
16.3
2.31
32.1
4-Methyl-2-Pentanone
2.6E+05
2.08
2.03 J
<0.121
1 <0.121
2.44
<0.121
<0.121
1.37 J
1.59 J
1.56 J
<0.121
0.811 J
0.634 J
<0.121
Styrene
8.8E+04
1.77 J
9.93
<0.124
0.771 J
6.18
<0.124
<0.124
1.49 J
7.80
7.90
0.647 J
1.46 J
<0.124
0.928 J
Tetrachloroethene
3.5E+03
2.73 J
4.64
2.521
6.96
92.9
1.681
1.78 J
1.21 J
1.50 J
2.20 J
0.976 J
1.59 J
5.91
1.82 J
Tetrahydrofuran
1.8E+05
5.33
1.29 J
11.9
5.26
1.09 J
4.18
4.09
8.02
1.05 J
0.878 J
40.5
12.5
0.342 J
133
Toluene
4.4E+05
42.1
16.0
1.751
2.37
13.0
0.584J
0.704J
37.1
11.4
11.7
9.76
6.10
4.94
2.91
Trichloroethene
1.8E+02
<0.199
<0.199
<0.199
<0.199
0.660J
<0.199
<0.199
<0.199
<0.199
<0.199
<0.199
<0.199
<0.199
<0.199
1,2,4-Trimethylbenzene
5.3E+03
9.49
9.78
0.727 J
2.12 J
10.8
<0.110
<0.110
8.66
7.44
7.59
1.45 J
2.27 J
7.15
0.884 J
1,3,5-Trimethylbenzene
5.3E+03
2.52
1.69 J
<0.236
0.900 J
1 1.91 J
<0.236
<0.236
2.98
1 1.42 J
1.44 J
0.929 J
0.541 J
0.786 J
0.393 J
Vinyl chloride
2.8E+02
<0.127
<0.127
<0.127
127
<0.127
<0.127
<0.127
<0.127
<0.127
<05.127
<0.127
<0.127
<0.127
o-Xylene
8.8E+03
14.4
5.27
1.301
87
<0.157
<0.157
28.8
5.76
5.87
5.49
2.50
1.25 J
8.8E+03
36.9
16.2
2.381
W22.72O.4
0.516J
0.529J
69.8
13.4
13.7
9.21
96
11m,p-Xylene
9.94
2.22J
Xylene (Total)
8.8E+03
51.3
21.5
3.68 J
30.9
.3
0.516 J
0.529 J
98.6
19.2
19.6
1 15.2
16.7
12.4
3.471
Notes:
1. Concentrations shown in micrograms per cubic meter (pg/m3)
2. NCDEQ Non -Residential SGSLs = Residential Vapor Intrusion Screening Level for Sub -Slab and Exterior Soil Gas (February 2024)
3. Detected concentrations are shown in bold
4. Values shown with "<MDL" were not detected above the referenced method detection limit
5. J indicates compound was detected at a concentration below the Reporting Limit (lowest calibration standard), detection is considered an estimate
6. B indicates compound was detected in laboratory method blank
7. DUP-1 is duplicate sample collected concurrently from VMP-3 on 5/8/2023.
8. DUP-2 is duplicate sample collected concurrently from VMP-2 on 2/15/2024.

APPENDIX A
VIMS As -Built - Above Slab Layout

155-#,
W—t1' T T 2$'— 0 2V—a' 25'—O' SERVICE
CLOSET
k I t I maw Ar.HT 5DE OF OFT, TYPP� 1o'-�' AS
22 eA3 N
W
CLEARS'
I
"104
r*pL9r'pF, Ai #`r- --r I-r-*r4* t�T� `�_ "r- "Ir`�r""�` _1f- ` �- iT `TIT- r -r �` .� I I r I
� M -r 1
-1b l-, 1 f fi - 15- L'-1J .� `, -��� r 12
I I
` I I 5 1
I I I I I 1 HALLWAY Al
I I VMP-1 I I Irh
r g i 141#
26 23I
I 1 I 1 10 OMEN'
I TVMP-1 ' TVMP 2051
I+ 120'--B' 1� MIN, CLFAR
I � I I I 7•-�� I
�_— —.—_—- — - — - — - — - — - — ----------------------.__—_-----•------_—_—_—_-------------_------------------------_--
1 -
------------------------------- R2 I I
SALES AREA I 1 I 1 I 1
RECEIVING A1uMP4 ` i _ x I
I I I � I � 7--a 7'-a 7-3I
1 1fi I
B V�ALL 1) 2-3 2-3 23 2.3 1 I 1
I I , 1 1 25 23
25 25 25 2� VMP-2 1 1 1
' 1
2 m, 1� #'-5" ' }k $ i -- -------------- I 1
I I I I 1$rtl I I 1
27 24 1 1 106A 5
17
I I I I J 1 1 R-3 I I
-- ---- - -- - - - -- -- R4 _t- __---_-_._ .-._._ .__-----_.---..-.._-_----------------- - -- --- -T--lelm --
I
�
1 4'-2r
I+ TVMP-4 ' i 1 1 i TVMP-3
21 ' I i I QF1
13 1 I • VMP-3 Q
I I
I i i 1 I R00
*� 1
' -� 100 a
I I I 23 I -
� I
2S r 4A 12 x7 1 26 24 !,
7 I I I I RISER
ROOM 1
1 I 1 &3, 1 1 100
I t I
6' 9'-0"�r-" I I I '?+-'�-----------�--------_:-
I ---
REVISION
DATE
DESCRIPTION
ENG
STAM P
�x%A 11101lt1
a ���+Esst��•�y�,�
SEA..
p45
1 h Hanley
1 PF Environmental
Engineering & Consulting
HANLEY ENVIRONMENTAL, PLLC
323 MANNING DRIVE
CHARLOTTE, NORTH CAROLINA28209
NC LICENSE P-2407
DATE
12/07/2022
PROJECT NO.
PJ22017
DRAWN BY
NH
SCALE: 1/8" = 1'-0"
CLIENT
MT. G I LEAD DG LCC
LEGEND
3" SCH 40 PVC SOLID EXHAUST VENT PIPE (DETAIL 5)
EXHAUST OUTLET APPROX. 18 INCHES ABOVE
ROOFLINE (DETAIL 5)
-- 3" SCH 40 PVC SOLID EXHAUST VENT RISER PIPE
HORIZONTAL JOG BENEATH ROOF
. PERMANENT VACUUM MONITORING POINT (DETAIL 3)
TEMPORARY VACUUM MONITORING POINT
(ABANDONED AFTER PFE TESTING) (DETAIL 7)
NOTES
1. SEE GENERAL SPECIFICATIONS ON SHEET V3.
2. DRAWING BACKGROUNDS FLOOR PLAN PROVIDED
BY NARRAMORE ASSOCIATES, INC. FLOOR PLAN IS
PRELIMINARY, NOT FINAL.
3. THIS VAPOR INTRUSION MITIGATION SYSTEM (VIMS)
DESIGN IS INTENDED TO BE USED FOR DIRECTION OF
VAPOR INTRUSION MITIGATION SYSTEM COMPONENTS
ONLY AND IS NOT INTENDED TO GUIDE
CONSTRUCTION OF STRUCTURAL COMPONENTS.
CONTRACTOR SHALL VERIFY CONSISTENCY OF DETAILS
WITH APPLICABLE STRUCTURAL, ARCHITECTURAL,
MECHANICAL, AND PLUMBING PLANS AND RESOLVE
INCONSISTENCIES PRIOR TO INSTALLATION.
4. VIMS COMPONENTS ARE EXAGGERATED FOR CLARITY.
5. TEMPORARY VACUUM MONITORING POINTS WERE
ABANDONED FOLLOWING PRESSURE FIELD EXTENSION
TESTING.
PROJECT
MT. G I LEAD COTTON OIL COMPANY
BROWNFIELDS PROPERTY
SHEET TITLE
VAPOR INTRUSION MITIGAITON SYSTEM
AS -BUILT - ABOVE SLAB LAYOUT
SHEET NO.
V2

APPENDIX B
Laboratory Analytical Report

Waypointo
ANALYTICAL
2/22/2024
Hanley Environmental, PLLC
David Hanley
323 Manning Drive
Charlotte, NC, 28209
449 5pringbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointanalytical.com
Ref: Analytical Testing
Lab Report Number: 24-047-0013
Client Project Description: Mt. Gilead Cotton Oil Co.
PJ22017
Dear David Hanley:
Waypoint Analytical, LLC (Charlotte) received sample(s) on 2/16/2024 for the analyses presented in the
following report.
The above referenced project has been analyzed per your instructions. The analyses were performed in
accordance with the applicable analytical method.
The analytical data has been validated using standard quality control measures performed as required by the
analytical method. Quality Assurance, method validations, instrumentation maintenance and calibration for all
parameters were performed in accordance with guidelines established by the USEPA (including 40 CFR 136
Method Update Rule May 2021) unless otherwise indicated.
Certain parameters (chlorine, pH, dissolved oxygen, sulfite...) are required to be analyzed within 15 minutes of
sampling. Usually, but not always, any field parameter analyzed at the laboratory is outside of this holding time.
Refer to sample analysis time for confirmation of holding time compliance.
The results are shown on the attached Report of Analysis(s). Results for solid matrices are reported on an as -
received basis unless otherwise indicated. This report shall not be reproduced except in full and relates only to
the samples included in this report.
Please do not hesitate to contact me or client services if you have any questions or need additional information.
Sincerely,
Danyale Love
Project Manager
Laboratory's liability in any claim relating to analyses performed shall be limited to, at laboratory's option, repeating the
analysis in question at laboratory's expense, or the refund of the charges paid for performance of said analysis.
Page 1 of 24

Waypoint.0
ANALYTICAL
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointana lyti ca Isom
Certification Summary
Laboratory ID: WP CNC: Waypoint Analytical Carolina, Inc. (C), Charlotte, NC
State
Program
Lab ID
Expiration Date
North Carolina
State Program
37735
07/31/2024
North Carolina
State Program
402
12/31/2024
South Carolina
State Program
99012
07/31/2024
South Carolina
State Program
99012
12/31/2023
Page 1 of 1 00016/24-047-0013
Page 2 of 24

Waypoint.(2)
ANALYTICAL
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointana lyti ca Isom
Sample Summary Table
Report Number: 24-047-0013
Client Project Description: Mt. Gilead Cotton Oil Co.
P322017
Lab No Client Sample ID Matrix Date Collected Date Received
97123
VMP-2
Air
02/15/2024
11:43
02/16/2024
12:21
97124
DUP-2
Air
02/15/2024
02/16/2024
12:21
97125
VMP-3
Air
02/15/2024
10:58
02/16/2024
12:21
97126
VMP-4
Air
02/15/2024
11:23
02/16/2024
12:21
97127
VMP-1
Air
02/15/2024
11:23
02/16/2024
12:21
Page 3 of 24

Waypoint.(2)
ANALYTICAL
Project: Mt. Gilead Cotton Oil Co.
Report Number: 24-047-0013
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointana lyti ca Isom
Summary of Detected
Client Sample ID Lab Sample ID
Method Parameters Result Units Report Limit Analyzed Qualifiers
VMP-2
V 97123
TO-15
Acetone
5.48
pg/m3
0.202
02/19/2024 16:33
TO-15
Benzene
0.261
pg/m3
0.073
02/19/2024 16:33
TO-15
Carbon Disulfide
0.803
pg/m3
0.060
02/19/2024 16:33
TO-15
Chloroform
6.29
pg/m3
0.086
02/19/2024 16:33
TO-15
Dichlorodifluoromethane
2.15
pg/m3
0.134
02/19/2024 16:33
TO-15
Ethanol
11.0
pg/m3
0.169
02/19/2024 16:33
TO-15
n-Hexane
0.429
pg/m3
0.047
02/19/2024 16:33
TO-15
Methyl Ethyl Ketone (MEK)
2.83
pg/m3
0.224
02/19/2024 16:33
TO-15
Tetrachloroethene
1.68
pg/m3
0.181
02/19/2024 16:33
TO-15
Tetrahydrofuran
4.18
pg/m3
0.107
02/19/2024 16:33
TO-15
Toluene
0.584
pg/m3
0.090
02/19/2024 16:33
TO-15
m,p-Xylene
0.516
pg/m3
0.217
02/19/2024 16:33
TO-15
Xylene (Total)
0.516
pg/m3
0.157
02/19/2024 16:33
DUP-2
V 97124
TO-15
Acetone
5.63
pg/m3
0.202
02/19/2024 17:36
TO-15
Benzene
0.265
pg/m3
0.073
02/19/2024 17:36
TO-15
Carbon Disulfide
0.769
pg/m3
0.060
02/19/2024 17:36
TO-15
Chloroform
6.15
pg/m3
0.086
02/19/2024 17:36
TO-15
Dichlorodifluoromethane
2.31
pg/m3
0.134
02/19/2024 17:36
TO-15
Ethanol
11.5
pg/m3
0.169
02/19/2024 17:36
TO-15
n-Hexane
0.592
pg/m3
0.047
02/19/2024 17:36
TO-15
Methyl Ethyl Ketone (MEK)
2.51
pg/m3
0.224
02/19/2024 17:36
TO-15
Tetrachloroethene
1.78
pg/m3
0.181
02/19/2024 17:36
TO-15
Tetrahydrofuran
4.09
pg/m3
0.107
02/19/2024 17:36
TO-15
Toluene
0.704
pg/m3
0.090
02/19/2024 17:36
TO-15
m,p-Xylene
0.529
pg/m3
0.217
02/19/2024 17:36
TO-15
Xylene (Total)
0.529
pg/m3
0.157
02/19/2024 17:36
VMP-3
V 97125
TO-15
Acetone
15.7
pg/m3
0.202
02/19/2024 18:39
TO-15
Benzene
2.19
pg/m3
0.073
02/19/2024 18:39
TO-15
Carbon Disulfide
0.526
pg/m3
0.060
02/19/2024 18:39
TO-15
Carbon Tetrachloride
1.35
pg/m3
0.155
02/19/2024 18:39
TO-15
Chloroform
1.12
pg/m3
0.086
02/19/2024 18:39
TO-15
Dichlorodifluoromethane
2.39
pg/m3
0.134
02/19/2024 18:39
TO-15
Ethanol
203
pg/m3
3.38
02/16/202419:00
TO-15
Ethylbenzene
4.58
pg/m3
0.106
02/19/2024 18:39
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
0
Page 4 of 24

Waypoint.
(2) 449 Springbrook
Rd, Charlotte, NC
28217
Main 704.529.6364
ANALYTICAL
www.waypointana lyti ca I som
Summary of Detected Analytes
Project:
Mt. Gilead Cotton Oil Co.
Report Number: 24-047-0013
Client Sample ID Lab Sample ID
Method
Parameters
Result
Units
Report Limit
Analyzed
Qualifiers
VMP-3
V 97125
TO-15
4-Ethyltoluene
0.516
pg/m3
0.128
02/19/2024 18:39
J
TO-15
Heptane
4.71
pg/m3
0.143
02/19/2024 18:39
TO-15
n-Hexane
10.5
pg/m3
0.047
02/19/2024 18:39
TO-15
Methyl Ethyl Ketone (MEK)
8.61
pg/m3
0.224
02/19/2024 18:39
TO-15
Styrene
0.647
pg/m3
0.124
02/19/2024 18:39
J
TO-15
Tetrachloroethene
0.976
pg/m3
0.181
02/19/2024 18:39
J
TO-15
Tetrahydrofuran
40.5
pg/m3
0.107
02/19/2024 18:39
TO-15
Toluene
9.76
pg/m3
0.090
02/19/2024 18:39
TO-15
1,2,4-Trimethyl benzene
1.45
pg/m3
0.110
02/19/2024 18:39
J
TO-15
1,3,5-Trimethyl benzene
0.929
pg/m3
0.236
02/19/2024 18:39
J
TO-15
o-Xylene
5.21
pg/m3
0.157
02/19/2024 18:39
TO-15
m,p-Xylene
9.96
pg/m3
0.217
02/19/2024 18:39
TO-15
Xylene (Total)
15.2
pg/m3
0.157
02/19/2024 18:39
VMP-4
V 97126
TO-15
Acetone
39.8
pg/m3
0.202
02/19/2024 19:39
TO-15
Benzene
0.888
pg/m3
0.073
02/19/2024 19:39
J
TO-15
Carbon Disulfide
0.747
pg/m3
0.060
02/19/2024 19:39
J
TO-15
Chloroform
12.1
pg/m3
0.086
02/19/2024 19:39
TO-15
Dichlorodifluoromethane
2.38
pg/m3
0.134
02/19/2024 19:39
J
TO-15
Ethanol
1260
pg/m3
3.38
02/16/202419:43
TO-15
Ethylbenzene
0.903
pg/m3
0.106
02/19/2024 19:39
J
TO-15
Heptane
5.52
pg/m3
0.143
02/19/2024 19:39
TO-15
n-Hexane
4.99
pg/m3
0.047
02/19/2024 19:39
TO-15
Methyl Ethyl Ketone (MEK)
32.1
pg/m3
0.224
02/19/2024 19:39
TO-15
Styrene
0.928
pg/m3
0.124
02/19/2024 19:39
J
TO-15
Tetrachloroethene
1.82
pg/m3
0.181
02/19/2024 19:39
J
TO-15
Tetrahydrofuran
133
pg/m3
0.107
02/19/2024 19:39
TO-15
Toluene
2.91
pg/m3
0.090
02/19/2024 19:39
TO-15
1,2,4-Trimethyl benzene
0.884
pg/m3
0.110
02/19/2024 19:39
J
TO-15
1,3,5-Trimethyl benzene
0.393
pg/m3
0.236
02/19/2024 19:39
J
TO-15
o-Xylene
1.25
pg/m3
0.157
02/19/2024 19:39
J
TO-15
m,p-Xylene
2.22
pg/m3
0.217
02/19/2024 19:39
J
TO-15
Xylene (Total)
3.47
pg/m3
0.157
02/19/2024 19:39
J
VMP-1
V 97127
TO-15
Acetone
12.8
pg/m3
0.202
02/19/2024 20:42
TO-15
Benzene
0.798
pg/m3
0.073
02/19/2024 20:42
J
Page 5 of 24

Waypoint. (2) 449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
ANALYTICAL www.waypointana lyti ca I som
Summary of Detected Analytes
Project: Mt. Gilead Cotton Oil Co.
Report Number: 24-047-0013
Client Sample ID
Method
Lab Sample ID
Parameters
Result
Units
Report Limit
Analyzed
Qualifiers
VMP-1
V 97127
TO-15
Carbon Disulfide
0.706
pg/m3
0.060
02/19/2024 20:42
J
TO-15
Chloroform
1.98
pg/m3
0.086
02/19/2024 20:42
J
TO-15
Dichlorodifluoromethane
2.32
pg/m3
0.134
02/19/2024 20:42
J
TO-15
Ethanol
148
pg/m3
3.38
02/16/2024 20:26
TO-15
Ethylbenzene
0.581
pg/m3
0.106
02/19/2024 20:42
J
TO-15
Heptane
0.635
pg/m3
0.143
02/19/2024 20:42
J
TO-15
n-Hexane
1.14
pg/m3
0.047
02/19/2024 20:42
J
TO-15
Methyl Ethyl Ketone (MEK)
7.24
pg/m3
0.224
02/19/2024 20:42
TO-15
Tetrachloroethene
2.52
pg/m3
0.181
02/19/2024 20:42
J
TO-15
Tetrahydrofuran
11.9
pg/m3
0.107
02/19/2024 20:42
TO-15
Toluene
1.75
pg/m3
0.090
02/19/2024 20:42
J
TO-15
1,2,4-Trimethyl benzene
0.727
pg/m3
0.110
02/19/2024 20:42
J
TO-15
o-Xylene
1.30
pg/m3
0.157
02/19/2024 20:42
J
TO-15
m,p-Xylene
2.38
pg/m3
0.217
02/19/2024 20:42
J
TO-15
Xylene (Total)
3.68
pg/m3
0.157
02/19/2024 20:42
J
Page 6 of 24

Waypoint. 0 449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
ANALYTICAL www.waypointanalytical.com
00293
Hanley Environmental, PLLC Project Mt. Gilead Cotton Oil Co.
David Hanley Report Date : 02/22/2024
323 Manning Drive Information : 13322017 Received : 02/16/2024
Charlotte , NC 28209
Report Number : 24-047-0013 REPOR T OF A NA L YSIS Danyale Love
Project Manager
Lab No : 97123
Matrix: Air
Sample ID: VMP-2
Sampled:
2/15/2024
11:43
Analytical Method: TO-15
Prep Batch(es):
V43844
02/19/24 09:00
Prep Method: TO-15 Prep
Test
Results
Units
MDL
MQL
DF
Date / Time
By
Analytical
Analyzed
Batch
Acetone
5.48
Ng/m3
0.202
4.75
1
02/19/24 16:33
ENM
V43846
Benzene
0.2613
u9/m3
0.073
1.60
1
02/19/24 16:33
ENM
V43846
Carbon Disulfide
0.8033
Ng/m3
0.060
6.23
1
02/19/24 16:33
ENM
V43846
Carbon Tetrachloride
<0.155
u9/m3
0.155
3.15
1
02/19/24 16:33
ENM
V43846
Chloroform
6.29
pg/m3
0.086
2.44
1
02/19/24 16:33
ENM
V43846
Chloromethane
<0.067
u9/m3
0.067
1.03
1
02/19/24 16:33
ENM
V43846
Dichlorodifluoromethane
2.153
Ng/m3
0.134
2.47
1
02/19/24 16:33
ENM
V43846
cis- 1,2-Dich loroethene
<0.095
u9/m3
0.095
1.98
1
02/19/24 16:33
ENM
V43846
trans-1,2-Dichloroethene
<0.108
Ng/m3
0.108
1.98
1
02/19/24 16:33
ENM
V43846
Ethanol
11.0
u9/m3
0.169
5.00
1
02/19/24 16:33
ENM
V43846
Ethylbenzene
<0.106
Ng/m3
0.106
2.17
1
02/19/24 16:33
ENM
V43846
4-Ethyltoluene
<0.128
u9/m3
0.128
2.46
1
02/19/24 16:33
ENM
V43846
Heptane
<0.143
Ng/m3
0.143
2.05
1
02/19/24 16:33
ENM
V43846
n-Hexane
0.429 J
u9/m3
0.047
1.76
1
02/19/24 16:33
ENM
V43846
Methyl Ethyl Ketone (MEK)
2.83
pg/m3
0.224
1.47
1
02/19/24 16:33
ENM
V43846
4-Methyl-2-Pentanone
<0.121
u9/m3
0.121
2.05
1
02/19/24 16:33
ENM
V43846
Styrene
<0.124
Ng/m3
0.124
2.13
1
02/19/24 16:33
ENM
V43846
Tetrachloroethene
1.683
u9/m3
0.181
3.39
1
02/19/24 16:33
ENM
V43846
Tetrahydrofuran
4.18
Ng/m3
0.107
1.47
1
02/19/24 16:33
ENM
V43846
Toluene
0.5841
u9/m3
0.090
1.88
1
02/19/24 16:33
ENM
V43846
Trichloroethene
<0.199
Ng/m3
0.199
2.15
1
02/19/24 16:33
ENM
V43846
1,2,4-Trimethyl benzene
<0.110
u9/m3
0.110
2.46
1
02/19/24 16:33
ENM
V43846
Qualifiers/ DF Dilution Factor
J
Estimated value
Definitions MQL Method Quantitation Limit
Page 7 of 24

WavDdibnto
ANALYTICAL
00293
Hanley Environmental, PLLC
David Hanley
323 Manning Drive
Charlotte , NC 28209
Report Number : 24-047-0013
Lab No : 97123
Sample ID: VMP-2
Analytical Method: TO-15
Prep Method: TO-15 Prep
Test
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointana lyti ca Isom
Project Mt. Gilead Cotton Oil Co.
Information : 13322017
REPORT OF ANAL YSIS
Prep Batch(es): V43844 02/19/24 09:00
Report Date : 02/22/2024
Received : 02/16/2024
C0"�&�Q�
Danyale Love
Project Manager
Matrix: Air
Sampled: 2/ 15/2024 11:43
Results Units MDL MQL DF Date / Time By Analytical
Analyzed Batch
1,3,5-Trimethyl benzene
<0.236
Ng/m3
0.236
2.46
Vinyl Chloride
<0.127
u9/m3
0.127
1.28
o-Xylene
<0.157
Ng/m3
0.157
2.17
m,p-Xylene
0.516 J
ug/m3
0.217
5.65
Xylene (Total)
0.516 J
Ng/m3
0.157
2.17
Surrogate: 4-13romofluorobenzene
96.6
Limits: 70-130%
Qualifiers/ DF Dilution Factor
Definitions MQL Method Quantitation Limit
1 02/19/24 16:33 ENM V43846
1 02/19/24 16:33 ENM V43846
1 02/19/24 16:33 ENM V43846
1 02/19/24 16:33 ENM V43846
1 02/19/24 16:33 V43846
1 02/19/24 16:33 ENM V43846
J Estimated value
Page 8 of 24

Waypoint. 0 449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
ANALYTICAL www.waypointanalytical.com
00293
Hanley Environmental, PLLC Project Mt. Gilead Cotton Oil Co.
David Hanley Report Date : 02/22/2024
323 Manning Drive Information : 13322017 Received : 02/16/2024
Charlotte , NC 28209
Report Number : 24-047-0013 REPOR T OF A NA L YSIS Danyale Love
Project Manager
Lab No : 97124
Matrix: Air
Sample ID: DUP-2
Sampled:
2/15/2024
0:00
Analytical Method: TO-15
Prep Batch(es):
V43844
02/19/24 09:00
Prep Method: TO-15 Prep
Test
Results
Units
MDL
MQL
DF
Date / Time
By
Analytical
Analyzed
Batch
Acetone
5.63
Ng/m3
0.202
4.75
1
02/19/24 17:36
ENM
V43846
Benzene
0.265 J
pg/m3
0.073
1.60
1
02/19/24 17:36
ENM
V43846
Carbon Disulfide
0.769 J
Ng/m3
0.060
6.23
1
02/19/24 17:36
ENM
V43846
Carbon Tetrachloride
<0.155
pg/m3
0.155
3.15
1
02/19/24 17:36
ENM
V43846
Chloroform
6.15
Ng/m3
0.086
2.44
1
02/19/24 17:36
ENM
V43846
Chloromethane
<0.067
pg/m3
0.067
1.03
1
02/19/24 17:36
ENM
V43846
Dichlorodifluoromethane
2.31 J
Ng/m3
0.134
2.47
1
02/19/24 17:36
ENM
V43846
cis- 1,2-Dich loroethene
<0.095
pg/m3
0.095
1.98
1
02/19/24 17:36
ENM
V43846
trans-1,2-Dichloroethene
<0.108
Ng/m3
0.108
1.98
1
02/19/24 17:36
ENM
V43846
Ethanol
11.5
pg/m3
0.169
5.00
1
02/19/24 17:36
ENM
V43846
Ethylbenzene
<0.106
Ng/m3
0.106
2.17
1
02/19/24 17:36
ENM
V43846
4-Ethyltoluene
<0.128
pg/m3
0.128
2.46
1
02/19/24 17:36
ENM
V43846
Heptane
<0.143
Ng/m3
0.143
2.05
1
02/19/24 17:36
ENM
V43846
n-Hexane
0.592 J
pg/m3
0.047
1.76
1
02/19/24 17:36
ENM
V43846
Methyl Ethyl Ketone (MEK)
2.51
pg/m3
0.224
1.47
1
02/19/24 17:36
ENM
V43846
4-Methyl-2-Pentanone
<0.121
pg/m3
0.121
2.05
1
02/19/24 17:36
ENM
V43846
Styrene
<0.124
Ng/m3
0.124
2.13
1
02/19/24 17:36
ENM
V43846
Tetrachloroethene
1.78 J
pg/m3
0.181
3.39
1
02/19/24 17:36
ENM
V43846
Tetrahydrofuran
4.09
Ng/m3
0.107
1.47
1
02/19/24 17:36
ENM
V43846
Toluene
0.704 J
pg/m3
0.090
1.88
1
02/19/24 17:36
ENM
V43846
Trichloroethene
<0.199
Ng/m3
0.199
2.15
1
02/19/24 17:36
ENM
V43846
1,2,4-Trimethyl benzene
<0.110
pg/m3
0.110
2.46
1
02/19/24 17:36
ENM
V43846
Qualifiers/ DF Dilution Factor
J
Estimated value
Definitions MQL Method Quantitation Limit
Page 9 of 24

WavDdibnto
ANALYTICAL
00293
Hanley Environmental, PLLC
David Hanley
323 Manning Drive
Charlotte , NC 28209
Report Number : 24-047-0013
Lab No : 97124
Sample ID: DUP-2
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointana lytica Isom
Project Mt. Gilead Cotton Oil Co.
Information : 13322017
REPORT OF ANAL YSIS
Report Date : 02/22/2024
Received : 02/16/2024
C0.'�&�Q�
Danyale Love
Project Manager
Matrix: Air
Sampled: 2/15/2024 0:00
Analytical Method: TO-15
Prep Batch(es):
V43844
02/19/24 09:00
Prep Method: TO-15 Prep
Test
Results
Units
MDL
MQL
DF
Date / Time
By
Analytical
Analyzed
Batch
1,3,5-Trimethyl benzene
<0.236
Ng/m3
0.236
2.46
1
02/19/24 17:36
ENM
V43846
Vinyl Chloride
<0.127
ug/m3
0.127
1.28
1
02/19/24 17:36
ENM
V43846
o-Xylene
<0.157
Ng/m3
0.157
2.17
1
02/19/24 17:36
ENM
V43846
m,p-Xylene
0.529 J
ug/m3
0.217
5.65
1
02/19/24 17:36
ENM
V43846
Xylene (Total)
0.529 J
pg/m3
0.157
2.17
1
02/19/24 17:36
V43846
Surrogate:4-Bromofluorobenzene
97.5
Limits:70-130%
1 02/19/24 17:36 ENM
V43846
Qualifiers/ DF Dilution Factor
Definitions MQL Method Quantitation Limit
J Estimated value
Page 10 of 24

Waypoint. 0 449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
ANALYTICAL www.waypointanalytical.com
00293
Hanley Environmental, PLLC Project Mt. Gilead Cotton Oil Co.
David Hanley Report Date : 02/22/2024
323 Manning Drive Information : 13322017 Received : 02/16/2024
Charlotte , NC 28209
Report Number : 24-047-0013 REPOR T OF A NA L YSIS Danyale Love
Project Manager
Lab No : 97125
Matrix: Air
Sample ID: VMP-3
Sampled:
2/15/2024
10:58
Analytical Method: TO-15
Prep Batch(es):
V43844
02/19/24 09:00
V43897
02/20/24 09:00
Prep Method: TO-15 Prep
Test
Results
Units
MDL
MQL
DF
Date / Time
By
Analytical
Analyzed
Batch
Acetone
15.7
p9/m3
0.202
4.75
1
02/19/24 18:39
ENM
V43846
Benzene
2.19
p9/m3
0.073
1.60
1
02/19/24 18:39
ENM
V43846
Carbon Disulfide
0.5263
p9/m3
0.060
6.23
1
02/19/24 18:39
ENM
V43846
Carbon Tetrachloride
1.353
p9/m3
0.155
3.15
1
02/19/24 18:39
ENM
V43846
Chloroform
1.123
p9/m3
0.086
2.44
1
02/19/24 18:39
ENM
V43846
Chloromethane
<0.067
p9/m3
0.067
1.03
1
02/19/24 18:39
ENM
V43846
Dichlorodifluoromethane
2.393
pg/m3
0.134
2.47
1
02/19/24 18:39
ENM
V43846
cis- 1,2-Dich loroethene
<0.095
p9/m3
0.095
1.98
1
02/19/24 18:39
ENM
V43846
trans-1,2-Dichloroethene
<0.108
p9/m3
0.108
1.98
1
02/19/24 18:39
ENM
V43846
Ethanol
203
p9/m3
3.38
100
20
02/16/2419:00
ENM
V43898
Ethylbenzene
4.58
p9/m3
0.106
2.17
1
02/19/24 18:39
ENM
V43846
4-Ethyltoluene
0.516 J
p9/m3
0.128
2.46
1
02/19/24 18:39
ENM
V43846
Heptane
4.71
pg/m3
0.143
2.05
1
02/19/24 18:39
ENM
V43846
n-Hexane
10.5
p9/m3
0.047
1.76
1
02/19/24 18:39
ENM
V43846
Methyl Ethyl Ketone (MEK)
8.61
pg/m3
0.224
1.47
1
02/19/24 18:39
ENM
V43846
4-Methyl-2-Pentanone
<0.121
pg/m3
0.121
2.05
1
02/19/24 18:39
ENM
V43846
Styrene
0.6473
p9/m3
0.124
2.13
1
02/19/24 18:39
ENM
V43846
Tetrachloroethene
0.9763
p9/m3
0.181
3.39
1
02/19/24 18:39
ENM
V43846
Tetrahydrofuran
40.5
p9/m3
0.107
1.47
1
02/19/24 18:39
ENM
V43846
Toluene
9.76
pg/m3
0.090
1.88
1
02/19/24 18:39
ENM
V43846
Trichloroethene
<0.199
pg/m3
0.199
2.15
1
02/19/24 18:39
ENM
V43846
1,2,4-Trimethyl benzene
1.451
pg/m3
0.110
2.46
1
02/19/24 18:39
ENM
V43846
Qualifiers/ DF Dilution Factor
J
Estimated value
Definitions MQL Method Quantitation Limit
Page 11 of 24

WavDdibnto
ANALYTICAL
00293
Hanley Environmental, PLLC
David Hanley
323 Manning Drive
Charlotte , NC 28209
Report Number : 24-047-0013
Lab No : 97125
Sample ID: VMP-3
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointana lytica Isom
Project Mt. Gilead Cotton Oil Co.
Information : 13322017
REPORT OF ANAL YSIS
Report Date : 02/22/2024
Received : 02/16/2024
C0.'�&�Q�
Danyale Love
Project Manager
Matrix: Air
Sampled: 2/ 15/2024 10:58
Analytical Method: TO-15 Prep Batch(es): V43844 02/19/24 09:00 V43897 02/20/24 09:00
Prep Method: TO-15 Prep
Test Results Units MDL MQL DF Date / Time By Analytical
Analyzed Batch
1,3, 5-Tri methyl benzene
Vinyl Chloride
o-Xylene
m,p-Xylene
Xylene (Total)
Surrogate: 4-Bromofl uorobenzene
Surrogate: 4-Bromofluorobenzene
0.9293
pg/m3
0.236 2.46
<0.127
u9/m3
0.127 1.28
5.21
Ng/m3
0.157 2.17
9.96
u9/m3
0.217 5.65
15.2
Ng/m3
0.157 2.17
101
Limits: 70-130%
95.8
Limits: 70-130%
1 02/19/2418:39 ENM V43846
1 02/19/2418:39 ENM V43846
1 02/19/2418:39 ENM V43846
1 02/19/2418:39 ENM V43846
1 02/19/24 18:39 V43846
1 02/19/2418:39 ENM V43846
20 02/16/2419:00 ENM V43898
Qualifiers/ DF Dilution Factor J Estimated value
Definitions MQL Method Quantitation Limit
Page 12 of 24

Waypoint. 0 449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
ANALYTICAL www.waypointanalytical.com
00293
Hanley Environmental, PLLC Project Mt. Gilead Cotton Oil Co.
David Hanley Report Date : 02/22/2024
323 Manning Drive Information : 13322017 Received : 02/16/2024
Charlotte , NC 28209
Report Number : 24-047-0013 REPOR T OF A NA L YSIS Danyale Love
Project Manager
Lab No : 97126
Matrix: Air
Sample ID: VMP-4
Sampled:
2/15/2024
11:23
Analytical Method: TO-15
Prep Batch(es):
V43844
02/19/24 09:00
V43897
02/20/24 09:00
Prep Method: TO-15 Prep
Test
Results
Units
MDL
MQL
DF
Date / Time
By
Analytical
Analyzed
Batch
Acetone
39.8
p9/m3
0.202
4.75
1
02/19/24 19:39
ENM
V43846
Benzene
0.8881
pg/m3
0.073
1.60
1
02/19/24 19:39
ENM
V43846
Carbon Disulfide
0.7473
pg/m3
0.060
6.23
1
02/19/24 19:39
ENM
V43846
Carbon Tetrachloride
<0.155
pg/m3
0.155
3.15
1
02/19/24 19:39
ENM
V43846
Chloroform
12.1
pg/m3
0.086
2.44
1
02/19/24 19:39
ENM
V43846
Chloromethane
<0.067
pg/m3
0.067
1.03
1
02/19/24 19:39
ENM
V43846
Dichlorodifluoromethane
2.38 3
pg/m3
0.134
2.47
1
02/19/24 19:39
ENM
V43846
cis- 1,2-Dich loroethene
<0.095
pg/m3
0.095
1.98
1
02/19/24 19:39
ENM
V43846
trans-1,2-Dichloroethene
<0.108
pg/m3
0.108
1.98
1
02/19/24 19:39
ENM
V43846
Ethanol
1260
pg/m3
3.38
100
20
02/16/2419:43
ENM
V43898
Ethylbenzene
0.9033
pg/m3
0.106
2.17
1
02/19/24 19:39
ENM
V43846
4-Ethyltoluene
<0.128
pg/m3
0.128
2.46
1
02/19/24 19:39
ENM
V43846
Heptane
5.52
pg/m3
0.143
2.05
1
02/19/24 19:39
ENM
V43846
n-Hexane
4.99
pg/m3
0.047
1.76
1
02/19/24 19:39
ENM
V43846
Methyl Ethyl Ketone (MEK)
32.1
pg/m3
0.224
1.47
1
02/19/24 19:39
ENM
V43846
4-Methyl-2-Pentanone
<0.121
pg/m3
0.121
2.05
1
02/19/24 19:39
ENM
V43846
Styrene
0.9283
pg/m3
0.124
2.13
1
02/19/24 19:39
ENM
V43846
Tetrachloroethene
1.821
pg/m3
0.181
3.39
1
02/19/24 19:39
ENM
V43846
Tetrahydrofuran
133
pg/m3
0.107
1.47
1
02/19/24 19:39
ENM
V43846
Toluene
2.91
pg/m3
0.090
1.88
1
02/19/24 19:39
ENM
V43846
Trichloroethene
<0.199
pg/m3
0.199
2.15
1
02/19/24 19:39
ENM
V43846
1,2,4-Trimethyl benzene
0.8841
pg/m3
0.110
2.46
1
02/19/24 19:39
ENM
V43846
Qualifiers/ DF Dilution Factor
J
Estimated value
Definitions MQL Method Quantitation Limit
Page 13 of 24

WavDdibnto
ANALYTICAL
00293
Hanley Environmental, PLLC
David Hanley
323 Manning Drive
Charlotte , NC 28209
Report Number : 24-047-0013
Lab No : 97126
Sample ID: VMP-4
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointana lytica Isom
Project Mt. Gilead Cotton Oil Co.
Information : 13322017
REPORT OF ANAL YSIS
Report Date : 02/22/2024
Received : 02/16/2024
C0.'�&�Q�
Danyale Love
Project Manager
Matrix: Air
Sampled: 2/ 15/2024 11:23
Analytical Method: TO-15 Prep Batch(es): V43844 02/19/24 09:00 V43897 02/20/24 09:00
Prep Method: TO-15 Prep
Test Results Units MDL MQL DF Date / Time By Analytical
Analyzed Batch
1,3, 5-Tri methyl benzene
Vinyl Chloride
o-Xylene
m,p-Xylene
Xylene (Total)
Surrogate: 4-Bromofl uorobenzene
Surrogate: 4-Bromofluorobenzene
0.3933
Ng/m3
0.236 2.46
<0.127
u9/m3
0.127 1.28
1.253
Ng/m3
0.157 2.17
2.223
Pg/m3
0.217 5.65
3.473
Ng/m3
0.157 2.17
100
Limits: 70-130%
93.9
Limits: 70-130%
1 02/19/2419:39 ENM V43846
1 02/19/2419:39 ENM V43846
1 02/19/2419:39 ENM V43846
1 02/19/2419:39 ENM V43846
1 02/19/24 19:39 V43846
1 02/19/2419:39 ENM V43846
20 02/16/2419:43 ENM V43898
Qualifiers/ DF Dilution Factor J Estimated value
Definitions MQL Method Quantitation Limit
Page 14 of 24

Waypoint. 0 449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
ANALYTICAL www.waypointanalytical.com
00293
Hanley Environmental, PLLC Project Mt. Gilead Cotton Oil Co.
David Hanley Report Date : 02/22/2024
323 Manning Drive Information : 13322017 Received : 02/16/2024
Charlotte , NC 28209
Report Number : 24-047-0013 REPOR T OF A NA L YSIS Danyale Love
Project Manager
Lab No : 97127
Matrix: Air
Sample ID: VMP-1
Sampled:
2/15/2024
11:23
Analytical Method: TO-15
Prep Batch(es):
V43844
02/19/24 09:00
V43897
02/20/24 09:00
Prep Method: TO-15 Prep
Test
Results
Units
MDL
MQL
DF
Date / Time
By
Analytical
Analyzed
Batch
Acetone
12.8
p9/m3
0.202
4.75
1
02/19/24 20:42
ENM
V43846
Benzene
0.7981
pg/m3
0.073
1.60
1
02/19/24 20:42
ENM
V43846
Carbon Disulfide
0.7063
pg/m3
0.060
6.23
1
02/19/24 20:42
ENM
V43846
Carbon Tetrachloride
<0.155
pg/m3
0.155
3.15
1
02/19/24 20:42
ENM
V43846
Chloroform
1.983
pg/m3
0.086
2.44
1
02/19/24 20:42
ENM
V43846
Chloromethane
<0.067
pg/m3
0.067
1.03
1
02/19/24 20:42
ENM
V43846
Dichlorodifluoromethane
2.323
pg/m3
0.134
2.47
1
02/19/24 20:42
ENM
V43846
cis- 1,2-Dich loroethene
<0.095
pg/m3
0.095
1.98
1
02/19/24 20:42
ENM
V43846
trans-1,2-Dichloroethene
<0.108
pg/m3
0.108
1.98
1
02/19/24 20:42
ENM
V43846
Ethanol
148
pg/m3
3.38
100
20
02/16/24 20:26
ENM
V43898
Ethylbenzene
0.5813
pg/m3
0.106
2.17
1
02/19/24 20:42
ENM
V43846
4-Ethyltoluene
<0.128
pg/m3
0.128
2.46
1
02/19/24 20:42
ENM
V43846
Heptane
0.6353
pg/m3
0.143
2.05
1
02/19/24 20:42
ENM
V43846
n-Hexane
1.14 J
pg/m3
0.047
1.76
1
02/19/24 20:42
ENM
V43846
Methyl Ethyl Ketone (MEK)
7.24
pg/m3
0.224
1.47
1
02/19/24 20:42
ENM
V43846
4-Methyl-2-Pentanone
<0.121
pg/m3
0.121
2.05
1
02/19/24 20:42
ENM
V43846
Styrene
<0.124
pg/m3
0.124
2.13
1
02/19/24 20:42
ENM
V43846
Tetrachloroethene
2.52 J
pg/m3
0.181
3.39
1
02/19/24 20:42
ENM
V43846
Tetrahydrofuran
11.9
pg/m3
0.107
1.47
1
02/19/24 20:42
ENM
V43846
Toluene
1.75 J
pg/m3
0.090
1.88
1
02/19/24 20:42
ENM
V43846
Trichloroethene
<0.199
pg/m3
0.199
2.15
1
02/19/24 20:42
ENM
V43846
1,2,4-Trimethyl benzene
0.727 J
pg/m3
0.110
2.46
1
02/19/24 20:42
ENM
V43846
Qualifiers/ DF Dilution Factor
J
Estimated value
Definitions MQL Method Quantitation Limit
Page 15 of 24

WavDdibnto
ANALYTICAL
00293
Hanley Environmental, PLLC
David Hanley
323 Manning Drive
Charlotte , NC 28209
Report Number : 24-047-0013
Lab No : 97127
Sample ID: VMP-1
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointana lyti ca Isom
Project Mt. Gilead Cotton Oil Co.
Information : 13322017
REPORT OF ANAL YSIS
Report Date : 02/22/2024
Received : 02/16/2024
C0.'�&�Q�
Danyale Love
Project Manager
Matrix: Air
Sampled: 2/ 15/2024 11:23
Analytical Method: TO-15
Prep Batch(es):
V43844
02/19/24 09:00 V43897 02/20/24 09:00
Prep Method: TO-15 Prep
Test
Results
Units
MDL
MQL
DF
Date / Time By
Analytical
Analyzed
Batch
1,3,5-Trimethylbenzene
<0.236
p9/m3
0.236
2.46
1
02/19/24 20:42 ENM
V43846
Vinyl Chloride
<0.127
pg/m3
0.127
1.28
1
02/19/24 20:42 ENM
V43846
o-Xylene
1.303
p9/m3
0.157
2.17
1
02/19/24 20:42 ENM
V43846
m,p-Xylene
2.383
pg/m3
0.217
5.65
1
02/19/24 20:42 ENM
V43846
Xylene (Total)
3.68 3
pg/m3
0.157
2.17
1
02/19/24 20:42
V43846
Surrogate: 4-Bromofluorobenzene
97.8
Limits:
70-130%
1 02/19/24 20:42 ENM
V43846
Surrogate: 4-Bromofluorobenzene
94.7
Limits:
70-130%
20 02/16/24 20:26 ENM
V43898
Qualifiers/ DF Dilution Factor
Definitions
J Estimated value
Page 16 of 24

Waypointo
ANALYTICAL
Client ID: Hanley Environmental, PLLC
Project Description: Mt. Gilead Cotton Oil Co.
Report No: 24-047-0013
QC Prep: V43844
QC Prep Batch Method: TO-15 Prep
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointanalytical.com
Quality Control Data
Lab Reagent Blank LRB-V43844
Associated Lab Samples: 97123, 97124, 97125, 97126, 97127
QC Analytical Batch(es): V43846
Analysis Method: TO-15
Analysis Description: Volatile Organic Compounds in Air- GC/MS
Matrix: AIR
Blank MDL MQL Analyzed % % Rec
Parameter Units Result Recovery Limits
Acetone
pg/m3
<0.202
0.202
4.75
02/19/24 11:32
Benzene
pg/m3
<0.073
0.073
1.60
02/19/24 11:32
Carbon Disulfide
pg/m3
<0.060
0.060
6.23
02/19/24 11:32
Carbon Tetrachloride
pg/m3
<0.155
0.155
3.15
02/19/24 11:32
Chloroform
pg/m3
<0.086
0.086
2.44
02/19/24 11:32
Chloromethane
pg/m3
<0.067
0.067
1.03
02/19/24 11:32
Dichlorodifluoromethane
pg/m3
<0.134
0.134
2.47
02/19/24 11:32
cis-1,2-Dichloroethene
pg/m3
<0.095
0.095
1.98
02/19/24 11:32
trans-1,2-Dichloroethene
pg/m3
<0.108
0.108
1.98
02/19/24 11:32
Ethanol
pg/m3
<0.169
0.169
5.00
02/19/24 11:32
Ethylbenzene
pg/m3
<0.106
0.106
2.17
02/19/24 11:32
4-Ethyltoluene
pg/m3
<0.128
0.128
2.46
02/19/24 11:32
Heptane
pg/m3
<0.143
0.143
2.05
02/19/24 11:32
n-Hexane
pg/m3
<0.047
0.047
1.76
02/19/24 11:32
Methyl Ethyl Ketone (MEK)
pg/m3
<0.224
0.224
1.47
02/19/24 11:32
4-Methyl-2-Pentanone
pg/m3
<0.121
0.121
2.05
02/19/24 11:32
Styrene
pg/m3
<0.124
0.124
2.13
02/19/24 11:32
Tetrachloroethene
pg/m3
<0.181
0.181
3.39
02/19/24 11:32
Tetrahydrofuran
pg/m3
<0.107
0.107
1.47
02/19/24 11:32
Toluene
pg/m3
<0.090
0.090
1.88
02/19/24 11:32
Trichloroethene
pg/m3
<0.199
0.199
2.15
02/19/24 11:32
1,2,4-Trimethyl benzene
pg/m3
<0.110
0.110
2.46
02/19/24 11:32
1,3,5-Trimethyl benzene
pg/m3
<0.236
0.236
2.46
02/19/24 11:32
Vinyl Chloride
pg/m3
<0.127
0.127
1.28
02/19/24 11:32
o-Xylene
pg/m3
<0.157
0.157
2.17
02/19/24 11:32
m,p-Xylene
pg/m3
<0.217
0.217
5.65
02/19/24 11:32
Date:
02/22/2024 03:47 PM
Page 1 of 4
Page 17 of 24

Waypointo
ANALYTICAL
Client ID: Hanley Environmental, PLLC
Project Description: Mt. Gilead Cotton Oil Co.
Report No: 24-047-0013
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypoi ntana lytica l.com
Quality Control Data
QC Prep: V43844 QC Analytical Batch(es): V43846
QC Prep Batch Method: TO-15 Prep Analysis Method: TO-15
Analysis Description: Volatile Organic Compounds in Air- GC/MS
Lab Reagent Blank LRB-V43844 Matrix: AIR
Associated Lab Samples: 97123, 97124, 97125, 97126, 97127
Blank MDL MQL Analyzed % % Rec
Parameter Units Result Recovery Limits
4-Bromofluorobenzene (S) 02/19/24 11:32 92.7 70-130
Laboratory Control Sample LCS-V43844
Spike LCS LCS %Rec % Rec
Parameter Units Conc. Result Limits
Acetone
pg/m3
11.9
14.1
118
70-130
Benzene
pg/m3
16.0
16.6
104
70-130
Carbon Disulfide
pg/m3
15.6
18.2
117
70-130
Carbon Tetrachloride
pg/m3
31.5
32.3
103
70-130
Chloroform
pg/m3
24.4
25.6
105
70-130
Chloromethane
pg/m3
10.3
12.2
118
70-130
Dichlorodifluoromethane
pg/m3
24.7
26.9
109
70-130
cis-1,2-Dichloroethene
pg/m3
19.8
22.2
112
70-130
trans-1,2-Dichloroethene
pg/m3
19.8
22.6
114
70-130
Ethanol
pg/m3
9.42
10.5
111
70-130
Ethylbenzene
pg/m3
21.7
24.3
112
70-130
4-Ethyltoluene
pg/m3
24.6
28.9
117
70-130
Heptane
pg/m3
20.5
22.2
108
70-130
n-Hexane
pg/m3
17.6
19.7
112
70-130
Methyl Ethyl Ketone (MEK)
pg/m3
14.8
16.0
108
70-130
4-Methyl-2-Pentanone
pg/m3
20.5
21.0
102
70-130
Styrene
pg/m3
21.3
26.2
123
70-130
Tetrachloroethene
pg/m3
33.9
35.4
104
70-130
Tetrahydrofuran
pg/m3
14.7
15.1
103
70-130
Toluene
pg/m3
18.8
19.2
102
70-130
Trichloroethene
pg/m3
26.9
28.9
107
70-130
1,2,4-Trimethyl benzene
pg/m3
24.6
29.3
119
70-130
Date: 02/22/2024 03:47 PM Page 2 of 4
Page 18 of 24

Waypointo
ANALYTICAL
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointanalytical.com
Quality Control Data
Client ID: Hanley Environmental, PLLC
Project Description: Mt. Gilead Cotton Oil Co.
Report No: 24-047-0013
QC Prep: V43844
QC Prep Batch Method: TO-15 Prep
Laboratory Control Sample LCS-V43844
QC Analytical Batch(es): V43846
Analysis Method: TO-15
Analysis Description: Volatile Organic Compounds in Air- GC/MS
Parameter
Units
Spike
Conc.
LCS
Result
LCS %Rec
% Rec
Limits
1,3,5-Trimethyl benzene
pg/m3
24.6
29.8
121
70-130
Vinyl Chloride
pg/m3
12.8
14.4
113
70-130
o-Xylene
pg/m3
21.7
25.5
118
70-130
m,p-Xylene
pg/m3
43.4
49.6
114
70-130
4-Bromofluorobenzene (S)
107
70-130
Date: 02/22/2024 03:47 PM Page 3 of 4
Page 19 of 24

Waypointo
ANALYTICAL
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointanalytical.com
Quality Control Data
Client ID: Hanley Environmental, PLLC
Project Description: Mt. Gilead Cotton Oil Co.
Report No: 24-047-0013
QC Prep: V43897 QC Analytical Batch(es): V43898
QC Prep Batch Method: TO-15 Prep Analysis Method: TO-15
Analysis Description: Volatile Organic Compounds in Air- GC/MS
Lab Reagent Blank LRB-V43897 Matrix: AIR
Associated Lab Samples: 97125, 97126, 97127
Blank MDL MQL Analyzed % % Rec
Parameter Units Result Recovery Limits
Ethanol pg/m3 0.254 0.169 5.00 02/16/2410:44
4-Bromofluorobenzene (S) 02/16/24 10:44 91.0 70-130
Laboratory Control Sample LCS-V43897
Spike LCS LCS %Rec % Rec
Parameter Units Conc. Result Limits
Ethanol pg/m3 9.42 9.60
4-Bromofluorobenzene (S)
102 70-130
101 70-130
Date: 02/22/2024 03:47 PM
Page 20 of 24
Page 4 of 4

WayPAoint.
NALYTICAL
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointanalytical.com
Shipment Receipt Form
Customer Number: 00293
Customer Name: Hanley Environmental, PLLC
Report Number: 24-047-0013
Shipping Method
0 Fed Ex 0 US Postal 0 Lab 0 Other:
0 UPS 0 Client 0 Courier Thermometer ID: N/A
Shipping container/cooler uncompromised?
0 Yes
0 No
Number of coolers/boxes received
F
Custody seals intact on shipping container/cooler?
0 Yes
0 No
Not Present
Custody seals intact on sample bottles?
0 Yes
0 No
Not Present
Chain of Custody (COC) present?
Yes
0 No
COC agrees with sample label(s)?
Yes
0 No
COC properly completed
Yes
0 No
Samples in proper containers?
U Yes
0 No
Sample containers intact?
0 Yes
0 No
Sufficient sample volume for indicated test(s)?
Yes
0 No
All samples received within holding time?
Yes
0 No
Cooler temperature in compliance?
0 Yes
0 No
Cooler/Samples arrived at the laboratory on ice.
Samples were considered acceptable as cooling
process had begun.
U Yes
0 No
Water - Sample containers properly preserved
0 Yes
0 No
CO,) N/A
Water - VOA vials free of headspace
0 Yes
0 No
�0,) N/A
Trip Blanks received with VOAs
0 Yes
0 No
�0,) N/A
Soil VOA method 5035 — compliance criteria met
0 Yes
0 No
U N/A
F_ High concentration container (48 hr)
F_ High concentration pre -weighed (methanol -14 d)
F Low concentration EnCore samplers (48 hr)
Low conc pre -weighed vials (Sod Bis -14 d)
Special precautions or instructions included?
0 Yes
0 No
Comments:
Signature: Angelo Norvell Date & Time: 02/16/2024 13:04:58
Page 21 of 24

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Page 23 of 24

TO-15 Analyte List
Mt. Gilead Cotton Oil Company Brownfields Property
Brownfields Project 25054-21-062
Future analyses of soil gas or indoor air at the proposed site building will be analyzed for
the following compounds previously detected in site soil gas, groundwater, or soil:
Acetone
Benzene
2-Butanone (MEK)
Carbon Disulfide
Carbon tetrachloride
Chloroform
Chioromethane
Cis- 1,2-dichlorethylene
Dichlorodifluoromethane (Freon 12)
Ethanol
Ethylbenzene
4-Ethyltoluene
Heptane
Hexane
4-Methyl-2-pentanone (MIRK)
Styrene
Tetrachloroethylene
Tetrahydrofuran
Toluene
Trans- 1,2-dichlorethylene
Trichloroethylene
1,2,4-Trimethylbenzene
1, 3,5-Trim ethyl be nze n e
m-Xylene
p-xylene
o-Xylene
Vinyl Chloride
1anley �vrrirnnmenlaf pLLC �llr � �+� �frf 0p-0 r��3 AJ2207
< 16-2624
I3 pp•19
Page 24 of 24

APPENDIX C
Risk Calculator Output

Risk Calculator - Vapor Intrusion - Non -Residential Worker Soil Gas to Indoor Air
.ion Date: February 2024
s: November 2023 EPA RSL Table
ID: Mt. Gilead Cotton Oil Company
Unit ID: VMP-1 through VM-4
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
All concentrations are in ug/m3
CAS #
Chemical Name:
Soil Gas
Concentration
3
(ug/m)
Calculated
Indoor Air
Concentration
3
(ug m)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1 E-06
Target Indoor Air
Conc. for Non -
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non -
Carcinogenic
Hazard
Quotient
67-64-1
Acetone
39.8
0.398
71-43-2
Benzene
2.19
0.0219
1.6E+00
2.6E+01
1.4E-08
1.7E-04
75-15-0
Carbon Disulfide
0.803
0.00803
6.1E+02
2.6E-06
56-23-5
Carbon Tetrachloride
1.35
0.0135
2.0E+00
8.8E+01
6.6E-09
3.1E-05
67-66-3
Chloroform
12.1
0.121
5.3E-01
8.6E+01
2.3E-07
2.8E-04
75-71-8
Dichlorodifluoromethane
2.39
0.0239
8.8E+01
5.5E-05
100-41-4
Ethylbenzene
4.58
0.0458
4.9E+00
8.8E+02
9.3E-09
1.0E-05
109-99-9
-Tetrahydrofuran
133
1.33
1.8E+03
1.5E-04
142-82-5
Heptane, N-
5.52
0.0552
3.5E+02
3.2E-05
110-54-3
Hexane, N-
10.5
0.105
6.1E+02
3.4E-05
78-93-3
Methyl Ethyl Ketone (2-Butanone)
32.1
0.321
4.4E+03
1.5E-05
100-42-5
Styrene
0.928
0.00928
8.8E+02
2.1E-06
127-18-4
Tetrachloroethylene
2.52
0.0252
4.7E+01
3.5E+01
5.3E-10
1.4E-04
108-88-3
Toluene
9.76
0.0976
4.4E+03
4.5E-06
95-63-6
Trimethylbenzene, 1,2,4-
1.45
0.0145
5.3E+01
5.5E-05
108-67-8
1 Trimethylbenzene, 1,3,5-
0.929
1 0.00929
1
5.3E+01
3.5E-OS
1330-20-7
Xylenes
15.2
0.152
8.8E+01
3.5E-04
Cumulative: I 2.6E-07 1 1.4E-03
North Carolina DEQ Risk Calculator

APPENDIX D
VIMS Inspection Checklist

Vapor Intrusion Mitigation System
Operation and Maintenance Checklist
Mt. Gilead Cotton Oil Company Brownfields Site (Project No. 25054-21-062)
Mt. Gilead, North Carolina
Name of Inspector:_Joe Gentilcore Title of Inspector: _Environmental Scientist
Date of Inspection: _2/15/24 Time of Inspection: _12:30
Visible Inspection of vent riser exhaust
Good conditions. Exhaust
R-4 label was replaced on
outlets
outlets are properly secured,
March 19, 2024.
• Confirm vent caps are in place
labeled, and vent caps in place.
and not blocked
Vent caps are not blocked.
• Confirm exhaust outlets are a
Exhaust outlets are a min. of 10
minimum of 10 feet from building
ft from intakes, openings, or
air intakes, openings in
breathing spaces.
structures, or breathing spaces
where individuals congregate or
R-4 label is beginning to peel off.
transverse
Inspect visible riser piping for damage or
Good condition. Riser piping
alterations
properly secured and labeled.
Check that vapor monitoring points
Good condition. VMPs are
(VMPs) are capped and not damaged
capped and not damaged.
Inspect visible portions of concrete
Concrete floor in mostly good
flooring for significant cracks and fill
condition. Expansion joints
cracks as needed.
between concrete sections in
center of building showing
slight deterioration. Additional
crack identified along building
centerline.
Inspect the building walls and floors for
No evidence of modifications
signs that modifications have been made
based on visual observations of
which could affect vapor intrusion
building walls and floors.
mitigation system performance (e.g., cuts
in concrete for utility work)
Verify no additions to the building have
Property use remains
been made resulting in new enclosed
commercial/industrial. No
areas that may require vapor intrusion
additions to the building or new
mitigation. Verify continued non-
structures are present.
residential use of the property.
Additional Information: _Conducted an inspection following post -occupancy sampling. Visual inspection
of buildings interior and exterior, and interview with site personnel
Follow up Inspection (Date ):
No follow up inspection required. Proof of label replacement was provided to Hanley Environmental.