20050 Rite Aid WP_Approval Building 1 VI Assessment 2020.12.10

Roy COOPER
Governor
MICHAEL S. REGAN
Secretary
MICHAEL SCOTT
Director
Sent Via E-Mail
Trinh C Desa, PG
Hart &Hickman
2923 South Tryon Street, Suite 100
Charlotte, NC 28203
NORTH CAROLINA
Environmental Quality
December 1, 2020
Subject: Work Plan Approval -Additional Vapor Assessment
Rite Aid Brownfields Site
Charlotte, Mecklenburg County
Brownfields Project No. 20050-16-060
Dear Mr. Desa,
The Department of Environmental Quality (DEQ) Brownfields Program received your work Plan
Additional Vapor Assessment Revision 2 dated November 19, 2020 for the above referenced
Brownfields Property. DEQ Brownfields reviewed this document, and determined that comments
made by DEQ Brownfields to the previous version of this work plan (dated November 16) have
been incorporated as requested. Therefore, DEQ Brownfields approves the current work plan.
Please be advised that this approval from DEQ Brownfields does not waive any applicable
requirement to obtain any necessary permits, licenses or certifications which may be required from
other state or local entities. If you have questions about this correspondence or require additional
information, please feel free to contact me by phone at 704/661-0330 or by email at
carolyn.minnich&ncdenr. gov
Sincerely,
C'vi—"4
Carolyn ininch
Brownfields Project Manager
ec: Kelly Johnson, DEQ
Jordan Thompson, DEQ
DEQ��
i�t " nUl Oual�ry
North Carolina Department of Environmental Quality I Division of Waste Management
217 West ones Street 11646 Mail Service Center I Raleigh, North Carolina 27699-1646
919,707,8200

Work Plan
Additional Vapor Assessment
Revision 2
Building 2 - South
Rite Aid Brownfields Site
Brownfields Project ID: #20050-16-060
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1730 Statesville Avenue
Charlotte, North Carolina
November 16, 2020
Revised November 19, 2020
H&H Job No. ATL-001
hart ,qg hickman
SMARTER ENVIRONMENTAL SOLUTIONS
#C-1269 Engineering
#C-245 Geology
2923 South Tryon Street, Suite 100 3921 Sunset Ridge Rd, Suite 301
Charlotte, NC 28203 Raleigh, INC 27607 www.harthickman.com
704.586.0007 main 919.847.4241 main

Work Plan - Revision 2
Additional Vapor Assessment
Building 2 - South
Rite Aid Brownfields Site
Brownfields Project ID: 20050-16-060
1730 Statesville Avenue
Charlotte, North Carolina
H&H Job No. ATL-001
Table of Contents
Section
Pale No.
1.0 Introduction............................................................................................................................ 1
2.0 Background Information....................................................................................................... 4
3.0 Brownfields Additional Assessment Scope of Work........................................................... 6
3.1 Vapor Intrusion Assessment................................................................................................. 6
3.2 Indoor Air Assessment......................................................................................................... 8
3.3 Quality Assurance/Quality Control.................................................................................... 10
3.4 Boring Abandonment and Investigation Derived Waste .................................................... 10
4.0 Reporting..............................................................................................................................11
Table 1 Proposed Sample Table
Tables
List of Figures
Figure 1 Site Location Map
Figure 2 Site Map
Figure 3 Proposed Sample Location Map
Appendices
Appendix A Summary of Previous Analytical Data
Appendix B Proposed Development Plans Building 2 South
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Work Plan — Revision 2
Additional Vapor Assessment
Building 2 - South
Rite Aid Brownfields Site
Brownfields Project ID:
1730 Statesville Avenue
Charlotte, North Carolina
H&H Job No. ATL-001
1.0 Introduction
On behalf of Camp Landowner, LP c/o Camp North End (CNE), Hart & Hickman, PC (H&H)
has prepared this work plan to conduct additional vapor assessment activities within the southern
portion of Building 2 located on the Rite Aid Brownfields property located at 1730 Statesville
Avenue (also listed at 201 Camp Road and 701 Keswick Avenue) in Charlotte, Mecklenburg
County, North Carolina (Site or subject Site). The proposed redevelopment is part of the Camp
North End redevelopment project. A Site location map is provided as Figure 1 and a Site Map is
provided as Figure 2.
The Rite Aid Brownfields Site is approximately 47.87 acres and is comprised of three contiguous
parcels of land (Mecklenburg PIN #s 07903102, 07903105, and 07903103). The Site entered
into a Brownfields Agreement with the North Carolina Department of Environmental Quality
(DEQ) Brownfields Program (Brownfields Project #20050-16-060) in October 2017. Soil and
groundwater contamination consisting primarily of volatile organic compounds (VOCs including
chlorinated solvents) and metals due to historical operations and activities. The US Army Corps
of Engineers (Corps), on behalf of the US Department of Defense (DOD) is working with DEQ
to address impacts release to historical operations conducted at the Site including manufacturing
of Model T Ford automobiles, a storage depot for the US Government, and for production of
Hercules missiles for the military.
The Protective Developer (PD) is Camp Landowner, LP, and the development is known as Camp
North End. Building 2 (previously referred to as Building 1 during Brownfields activities, and
Corps Building 5) is located in the eastern -central portion of the Rite Aid Brownfields Site as
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depicted on Figure 1. The Building 2 designation for this building is used throughout this Work
Plan.
Building 2 is currently a vacant warehouse constructed with brick and concrete block walls on a
raised concrete foundation. During Site redevelopment activities, Keswick Avenue was recently
extended across N. Graham Street in a westerly direction and passes through the central portion
of the Building 2 creating two buildings connected by a roof. The two sections of Building 2 are
identified as Building 2-North and Building 2-South. Building 2—North is proposed to retrofitted
for future commercial use. Building 2-South is proposed to be retrofitted for multi -use. The
northern section of Building 2-South is proposed to contain commercial retail spaces, the center
of the building is proposed to be demolished and re -built with an open-air parking deck, and the
southern section of the building is proposed to contain a five -floor multi -family residential
apartment building with amenity spaces. Note, portions of the proposed residential units will be
located outside of the current footprint of the existing building. In addition, a small commercial
space is proposed to be constructed on the north central portion of the parking deck and is
proposed to contain a slab -on -grade. Also, please note that although it appears the parking deck
will be physically connected to the residential apartment building and retail spaces, we do not
anticipate that there will be a connected HVAC system between these structures.
During initial Brownfield assessment activities conducted in 2016, H&H conducted sub -slab and
indoor air sampling activities and identified elevated concentrations of VOCs including
trichloroethylene (TCE) at concentrations in both sub -slab vapors and indoor air within the
northern portion of Building 2. The source of the TCE contamination appears to be a TCE
plume in groundwater located northeast of Building 2 and DEQ is requiring construction of a
vapor mitigation system (VMS) in the Building 2 — North prior to allowing occupation of the
building for residential/commercial use.
H&H recently prepared a Vapor Intrusion Mitigation Plan (VIMP) for a proposed Cupolex®
VMS proposed above the existing concrete floor in Building 2 — North. During recent review of
a Vapor Intrusion Mitigation Plan (VIMP) prepared for the VMS proposed in the northern
portion of Building 2, DEQ requested conducting additional vapor assessment activities in
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Building 2 — South. This work plan describes proposed assessment activities to address the
additional sub -slab and soil sampling activities have been proposed within Building 2 — South
based on recent discussions with DEQ Brownfields Mr. Kelly Johnson and Ms. Carolyn
Minnich. Background information from previous sub -slab and indoor air assessment activities
conducted during initial Brownfield assessment activities are summarized below in Section 2.0.
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2.0 Background Information
As discussed above, H&H conducted initial Brownfield assessment activities at the Site, which
consisted of sub -slab soil vapor (SSV) and indoor air (IA) sampling activities in 2016. The SSV
sampling results were summarized in the H&H Phase I and II Environmental Site Assessment
report dated August 16, 2016, and the indoor air sampling results are summarized in the H&H
Indoor Air Assessment report dated, November 9, 2016. A brief summary of the SSV and IA
sampling results for Building 2 (formerly identified as Building 1 during the initial Brownfields
assessment activities) is described below.
In April 2016, H&H installed three temporary soil -gas monitoring points (SGMPs), SSV-4
through SSV-6, in Building 2. Analytical results indicated that WE was detected above the NC
DEQ non-residential Sub -Slab Soil Gas Screening Levels (SGSLs) in SSV-4 (34,000 µg/m) and
SSV-5 (3,000,000 µg/m3) collected in Building 2 - North. In addition, tetrachloroethylene (PCE)
was detected above its residential SGSLs and chloroform was detected above its non-residential
SGSLs in sample SSV-5. TCE (13 µg/m3) and PCE (3 µg/m3) were also detected in the SSV-6
sample (collected in Building 2 - South) at concentrations below the residential SGSLs of 13.9
and 278 µg/m3, respectively.
Based on the results of the SSV sampling, H&H conducted IA sampling activities in Building 2
in June 2016. H&H collected a five indoor air samples (IAS-1 through IAS-5) in Building 2 -
North, and three indoor air samples (IAS-6, IAS-22, and IAS-23) in Building 2 - South. Please
note, that IA samples IAS-22 and IAS-23 were collected from the southern portion of Building 2
after a temporary vapor wall barrier (comprised of plastic sheeting and drywall) was installed
between the northern side and southern side of Building 2. The purpose of the temporary vapor
wall barrier was to prevent air exchange between the northern and southern portions of Building
2, and thus isolate each area prior to and during the sampling event.
The indoor air samples were analyzed for PCE, TCE, and their degradation products, and
chloroform. Note, acrolein was also included as an analyte for the IA samples because previous
IA sampling conducted by Hoffman Engineering, Inc. (on behalf of Rite Aid in 2008) reported
Id
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acrolein at concentrations above the DWM Indoor Air Screening Levels (IASLs). The analytical
data from the IA samples indicated that TCE was detected above the non-residential IASL in
samples IAS-2 through IAS-5 located in Building 2 - North. WE was detected above its
residential IASL in sample IAS-1, collected from the northernmost section of Building 2 - North,
and in IAS-6, collected from Building 2 - South. However, TCE was not detected above the
residential IASL in samples IAS-22 and IAS-23, collected from Building 2 — South after
installation of the temporary vapor wall barrier. Acrolein was detected above its non-residential
IASL in each sample, but was also detected in the background samples. In addition, acrolein
was not detected in the previous SSV samples from Building 2 and is also a common by-product
of petroleum and tobacco combustion. Therefore, it is unlikely that acrolein was a result of
vapor intrusion from the sub -surface. DEQ issued a project memorandum noting that acrolein
was not considered an environmental impact from historical operations at the Site. Excerpts
included analytical data tables and sample location maps from the previous assessment activities
are included as Appendix A.
Based on the TCE detections in indoor air within the northern portion of Building 2, DEQ
determined that vapor intrusion mitigation controls were warranted for the northern area of
Building 2. Based on the results of the indoor air sampling data, DEQ determined that vapor
mitigation controls were not warranted for the southern portion of the Building 2, located south
of the previous temporary vapor wall barrier. However, during recent review of the VIMP for
Building 2 - North, Mr. Johnson request further assessment of the southern portion of Building 2
due to the timeframe (four years) since this portion of the building was last assessed. A
summary of the proposed scope of work for additional vapor assessment is presented below in
Section 3.0.
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3.0 Brownfields Additional Assessment Scope of Work
The proposed vapor assessment activities in the southern portion of Building 2 will be performed
in general accordance with DEQ's IHSB Guidelines for Assessment and Cleanup (Guidelines)
dated January 2020, the November 2018 DEQ Brownfields Assessment Work Plan Checklist, the
DEQ Division of Waste Management (DWM) Vapor Intrusion Guidance dated March 2018, and
the most recent version of the U.S. Environmental Protection Agency (EPA) Region IV Science
and Ecosystem Support (SESD) Field Branches Quality System and Technical Procedures
guidance.
Based upon the previous assessment activities, Site history, current redevelopment plans, and
DEQ requests, H&H prepared a scope of work for additional assessment to evaluate potential
risks associated with future Site development. Our proposed scope of work is presented in the
following sections.
3.1 Vapor Intrusion Assessment
As noted previously in Section 2.0, soil gas and indoor air samples were previously conducted in
the northern and southern portions of Building 2 during initial Brownfield vapor assessment
activities conducted in 2016. To further evaluate the potential for vapor intrusion associated the
proposed uses Building 2 - South, H&H proposes to install and sample seven (7) permanent sub -
slab vapor sampling points (B2-SSVP-1 through B2-SSVP-7). B2-SSVP-1 through B2-SSVP-3
will be installed in the northern section of Building 2 — South where the proposed commercial
use spaces are located. B2-SSVP-4 will be installed in the north -central portion of the building
where the new commercial space is proposed to be located. B2-SSVP-5 will be installed within
the footprint of the proposed parking deck stairwell, and B2-SSVP-6 and B2-SSVP-6 will be
installed in the southern section of the Building 2 — South where the proposed footprint of the
residential building is located. In addition to the sub -slab vapor points, one permanent soil gas
vapor point (B2—SGP-1) will be installed and sampled from the southwestern footprint of the
proposed residential building that is located outside and south of the existing footprint of the
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current Building 2. A proposed sample table is included as Table 1 and the proposed sample
locations are presented on Figure 3.
The proposed sub -slab vapor sample locations will be installed and sampled in general
accordance with the DEQ DWM Vapor Intrusion Guidance and as described below. The sub -
slab vapor points will be installed by utilizing a hammer drill and 1'/2-inch diameter drill bit to
advance a pilot hole into the concrete slab to a depth of approximately 13/4 inches below the
surface. A drill guide will then be placed in the pilot hole, and a 5/8-inch diameter drill bit will
be utilized to advance the boring through the concrete slab. Following concrete borehole
advancement, loose concrete cuttings will be removed from the boring using a bottlebrush and
high efficiency particulate air (HEPA) vacuum. A Cox -Colvin Vapor PinTM (vapor pin)
assembly (brass sampling point and silicone sleeve) will be seated in the borehole using an
installation/extraction tool and hammer. The vapor pins will be installed as flush -mount sample
points capable of being secured with a stainless -steel cover that screws onto the sampling point
and is seated within the pilot hole annulus.
The soil gas monitoring point will be installed utilizing direct push technology (DPT) or hand
auger methods to advance the boring into the vadose zone to an approximate depth of 10 ft
below ground surface, or a minimum of 3 ft above the water table. The soil will be logged for
lithological description and field screened for indication of potential impacts by observation for
staining, and the presence of organic vapors using a calibrated photoionization detector (PID). A
6-inch stainless -steel screen point fitted with 1/4-inch diameter Teflon® tubing will then be
installed in the borehole to the maximum depth of the boring. Filter sand will be placed in the
annulus space between the screen point and the borehole and will extend to approximately one ft
above the bottom of the borehole. The sampling point will be completed by placing hydrated
bentonite and grout from the top of the filter sand to the ground surface and installation of a
lockable vapor point cap, protective steel cover, and a concrete pad set flush with surrounding
ground surface.
Upon installation, the sample point will be purged of a minimum of three times the volume of the
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annular space plus the tubing volume using a syringe or air pump. The point will be allowed to
stabilize for a minimum of two hours after installation prior to sampling.
Prior to sampling the sub -slab and soil -gas vapor monitoring points, a leak check will be
conducted at each location by constructing a shroud over the entire sampling train and flooding
the air within the shroud with helium gas. Using a syringe or air pump, a sample will be
collected from the gas in the shroud into a Tedlar® bag and analyzed for helium concentrations
using a helium gas detector. Vapor from the monitoring points will be purged and sampled
outside of the shroud into a separate Tedlar® bag and analyzed using the helium gas detector to
ensure that helium concentrations are less than 10% of the concentration measured within the
shroud.
Following a successful field leak check, the sub -slab and soil -gas samples will be collected into
one -liter Summa canisters for laboratory analysis by connecting the Teflon® sample tubing to an
airflow regulator using a brass nut and ferrule assembly to create an airtight seal. Shut-in leak
tests will be performed on each Summa canister and sampling train prior to sampling. The
airflow regulator will be calibrated by the laboratory to allow the Summa canisters to fill slowly
at a rate not greater than 200 milliliters per minute. The vacuum pressure in each Summa
canister upon completion of the sampling event will be between three and six inches of mercury.
Upon completion of sample collection, the air flow regulator will be removed from the Summa
canister and the samples will be shipped to a nationally accredited laboratory via FedEx or
courier under standard chain of custody protocols for analysis of full -list VOCs by EPA Method
TO-15. Upon receipt of the samples, the laboratory will record the final received vacuum
pressure for each Summa canister. The sub -slab vapor monitoring point locations will be
estimated using a sub -meter GPS unit.
3.2 Indoor Air Assessment
H&H will collect two indoor air samples (B2 IAS-1 through B2 IAS-2) from the northern
portion of Building 2 — South that are proposed to contain enclosed retrofitted tenant spaces.
The indoor air samples will be collected in these locations because the existing building concrete
slab and exterior walls are proposed to remain in -place. Additionally, an exterior background
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sample (BAS-1) will be collected. The location of the outdoor background sample will be
determined on the day of the sampling based upon the prevailing wind direction on that day.
Note, in order to avoid potential interference with the indoor air samples from sub -slab vapors
encountered during installation of the sub -slab vapor points, the indoor air samples will be
collected prior to installation of the sub -slab vapor points. A proposed sample table is included
as Table 1 and the proposed indoor air sample locations are presented on Figure 3.
The background and indoor air samples will be collected into individually -certified 6-liter
stainless steel sample canisters (i.e., Summa canisters) connected to in -line flow controllers with
a vacuum gauge. The flow controllers will be set so that the samples are collected over an 8-
hour period. A 3 ft long sampling cane will be connected to the flow controller so that the
sample intake point is positioned approximately 5 ft above grade (typical breathing zone height)
when the sample canister is set on its base. During the sampling activities, indoor/outdoor air
pressure differential will be measured near the start, middle, and end of the 8-hour sampling
period using a manometer sensitive to 0.001 inches of water. In addition, exterior wind speed,
exterior wind direction, indoor/outdoor temperature, and precipitation (if any) will be recorded
near the start, middle, and end of the sampling period. H&H will also complete a DEQ Indoor
Air Building Survey and Sampling Form to record sample information and building conditions at
the time of sampling.
Prior to and after the indoor and background air samples are collected, vacuum in the canisters
will be measured using a laboratory -supplied vacuum gauge and recorded by sampling
personnel. The starting and ending vacuum in each canister will be recorded on the sample
chain -of -custody. The sample canisters will then be labeled and shipped under standard chain -
of -custody procedures via FedEx or courier to a qualified laboratory for analysis of full -list
VOCs by Method TO-15. The laboratory will be instructed to use reporting limits that are below
applicable DEQ screening levels for the VOCs to the extent possible. The indoor air and
background samples will be placed on -hold pending the results of the sub -slab vapor samples.
These samples will be released for analysis if risk calculations indicate that unacceptable
carcinogenic or non -carcinogenic risk is present in the soil -gas and/or sub -slab samples.
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3.3 Quality Assurance/Quality Control
For field and laboratory quality assurance/quality control (QA/QC) purposes, H&H will collect
one duplicate sub -slab sample and one duplicate indoor air sample to satisfy DEQ Brownfields
minimum sample frequency of 1 duplicate per 20 samples per media and method. The duplicate
samples will be analyzed for the same compounds as the parent sample. In addition, H&H will
request a Level II QA/QC data package from the laboratory and the laboratory will report values
to the laboratory -specified method detection limits using J-flags. During the sample, field
personnel will record the canister pressure in the field when starting and ending the testing event,
and this will be included on the laboratory chain of custody. In addition, pressure in the sample
canisters will be measured by the laboratory and recorded to verify the canisters contain
minimum greater than 3 millimeters of mercury (mmhg) at the laboratory upon receipt.
Prior to sample collection, H&H will conduct a five-minute sampling system shut-in test for each
sub sample canister to verify an airtight seal between the Summa canister and airflow regulator.
3.4 Boring Abandonment and Investigation Derived Waste
H&H does not anticipate deriving any significant amount of investigation derived waste (IDW)
during sub -slab, soil gas, and indoor air sampling activities. If soils are produced during the
activities, they will be managed in accordance with the DEQ-approved Environmental
Management Plan.
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4.0 Reporting
Upon completion of the field activities and receipt of the analytical data, H&H will prepare a
report which describes the methods and results of the additional vapor assessment activities. The
report will include a description of field activities, a tabular summary of the analytical results in
comparison to regulatory screening levels, risk calculation results, a figure depicting the sample
locations, laboratory analytical reports including chain of custody, a discussion of QA/QC data,
and conclusions based upon our assessment activities. In addition, the summary tables will
include the canisters starting and ending pressure with both the field and laboratory
measurements. The report will include the firm's PE/PG numbers and will be sealed by an
individual with a PE/PG seal and signature.
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Table
• Table 1 - Proposed Sample Summary Table

Table 1
Proposed Sample Summary Table
Additional Vapor Assessment
Building 2 - South
Rite Aid Brownfields Site
1730 Statesville Avenue
Charlotte, North Carolina
H&H Job No. ATL-001
Sample Objective
Building 2 - South
Sample ID
Sample Media
Proposed Sample
Depth
VOCs by EPA
Method TO-15
Duplicate
Sample
Future Commercial
Occupant
Protection
Warehouse
B2 - SSVP-1
Sub -Slab Vapor
1.75 inches
X
X
Warehouse
B2 - SSVP-2
X
Warehouse
B2 - SSVP-3
X
Future Residential
Occupant
Protection
Warehouse
B2 - SSVP-4
X
Warehouse
B2 - SSVP-5
X
Warehouse
B2 - SSVP-6
X
Warehouse
B2 - SSVP-7
X
South of Warehouse
B2 - SGP-1
Soil -Gas
loft
X
Future Commercial
Occupant
Protection
Warehouse
B2 - IAS-1
Indoor Air
N/A
X
X
Warehouse
B2 - IAS-2
N/A
X
Warehouse
B2 - IAS-3
N/A
X
Background
Outdoors
B2 BAS-1
Background Air
N/A
X
Notes:
VOCs = volatile organic compounds
EPA = Environmental Protection Agency
SSVP = sub -slab vapor point
SGP = soil -gas point
IAS = indoor air sample
BAS = background air sample
N/A = not applicable
Table 1 (Page 1 of 1)
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Figures
• Figure 1 - Site Location Map
• Figure 2 — Site Map
• Figure 3 — Proposal Sample Location Map

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LEGEND
SITE PROPERTY BOUNDARY NOTES:
1. VAPOR INTRUSION MITIGATION SYSTEM (VIMS) IS PROPOSED
FOR BUILDING 2 - NORTH.
TEMPORARY WALL SEAL LOCATION
(INSTALLED FOR THE SEPTEMBER 2016 2. BUILDING 2 WAS FORMERLY REFERRED TO AS BUILDING 1
INDOOR AIR SAMPLING EVENT) DURING PREVIOUS ASSESSMENT ACTIVITIES.
PROPOSED AREA FOR VAPOR INTUSION 3. REFER TO SHEETS VM-1, VM-2, AND VM-2 FOR THE VIMS
MITIGATION SYSTEM DETAILS.
(APPROXIMATELY 101,000 SQ FT)
PROPOSED KESWICK EXTENSION (KESWICK
CUT) OPEN-AIR STREET
140
+r.
SITE MAP
N PROJECT CAMP NORTH END
APPROXIMATE BUILDING 2 -SOUTH
0 130 260 1730 STATESVILLE AVENUE
-I Emmommi
SCALE IN FEET CHARLOTTE, NORTH CAROLINA
2923 South Tryon Street -Suite 100
had 4 hickman Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
SMARTER ENVIRONMENTAL SOLUTIONS License # C-1269 / #C-245 Geology
DATE: 11-13-20 REVISION NO. 0
JOB NO. ATL-001 FIGURE NO. 2

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LEGEND
B2-SSVP-4 ®
PROPOSED SUB -SLAB VAPOR SAMPLE
NOTES:
SITE PROPERTY BOUNDARY
1. VAPOR INTRUSION MITIGATION SYSTEM (VIMS) IS PROPOSED FOR
B2-SGP-1 ®
PROPOSED SOIL -GAS POINT AND SAMPLE
BUILDING 2 - NORTH.
— — — — TEMPORARY WALL SEAL LOCATION
(INSTALLED FOR THE SEPTEMBER 2016
B2-IAS-2
®
PROPOSED INDOOR AIR SAMPLE (PLACED ON
2. REFER TO BUILDING PLANS - A0.11 - LEASING PLAN B - PROPOSED
INDOOR AIR SAMPLING EVENT)
HOLD)
FOR DETAILS REGARDING THE PROPOSED RESIDENTIAL AND
COMMERCIAL SPACE LAYOUT AND FOR THE SAMPLE LOCATIONS IN
PROPOSED AREA FOR VAPOR INTUSION
RELATION TO THE PROPOSED BUILDING.
MITIGATION SYSTEM
(APPROXIMATELY 101,000 SO FT)
„T71 PROPOSED KESWICK EXTENSION (KESWICK
CUT) OPEN-AIR STREET
TITLE
PROPOSED SAMPLE LOCATION MAP
aixo �a
CAMP NORTH END /RITE AID FACILITY
APPROXIMATE
BROWNFIELDS PROJECT NO. 20050-16-060
130
260
1776 STATESVILLE AVENUE
SCALE IN FEET mmmmmmmmw
CHARLOTTE, NORTH CAROLINA
2121 South Tryon Strect-Suite 100
hailhickman
i 4 Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(o
SMARTER ENVIRONMENTAL SOLUTIONS License # C-1269 / #C-245 Geology
DATE: 11-19-20
REVISION NO. 2
JOB NO. ATL-001
FIGURE NO. 3

Appendix A
Summary of Historical Analytical Data

Via Email
November 9, 2016
ATCO, LLC
555 Fifth Avenue, 16th Floor
New York, NY 10017
Attention: Mr. Neil Adamson
Re: Indoor Air Assessment
Rite Aid Facility
1776 Statesville Avenue
Charlotte, North Carolina
H&H Project No. ATL-001
Dear Neil:
1.0 Introduction
hart '.4 hickman
SMARTER ENVIRONMENTAL SOLUTIONS
This Indoor Air Assessment report has been prepared by Hart & Hickman, P.C. (H&H) on behalf
of ATCO, LLC for the Rite Aid Facility located at 1776 Statesville Avenue in Charlotte,
Mecklenburg County, North Carolina. A site location map is provided as Figure 1. The site is
occupied by three main buildings (referred to as Buildings 1, 2, and 3) ad several smaller buildings
(referred to as Buildings 48, 50, T-26, Boiler House, and Regional Training Office). A site plan
is provided as Figure 2. The site was most recently occupied by Rite Aid for warehousing
purposes, but Rite Aid is in the process of moving operations to a different location.
The site was formerly part of the Charlotte Army Missile Plant (CAMP). Results of previous
assessment activities conducted by the US Army Corps of Engineers indicate the presence of
chlorinated solvents in groundwater in the northern portion of the site as result of previous
Department of Defense (DOD) operations. To evaluate the potential for vapor intrusion into the
site buildings, H&H performed sub -slab soil vapor (SSV) and subsequent indoor air (IA) sampling
activities. The IA assessment included the collection and analysis of 23 IA samples in several of
2923 South Tryon Street, Suite 100 3334 Hillsborough Street
Charlotte, NC 28203 Raleigh, NC 27607 www.harthickman.com
704.S86.0007 main 919,847.4241 main

Mr. Neil Adamson
November 9, 2016
Page 2
the site buildings in June and September 2016. The vapor intrusion assessment activities were
completed in general accordance with the North Carolina Department of Environmental Quality
(DEQ) Division of Waste Management (DWM) Vapor Intrusion Guidance dated April 2014 (VI
Guidance).
2.0 Previous Sub -Slab Vapor Assessment Activities
As reported in the H&H Phase I and II ESA dated August 16, 2016, H&H previously installed and
sampled sub -slab soil gas monitoring points (SGMPs) at the site in April 2016. H&H installed 12
SGMPs and collected SSV samples from the following buildings:
• Building 1 (SSV-4 through SSV-6)
• Building 2 (SSV-11 and SSV-12)
• Building 3 (SSV-7 and SSV-8)
• T-26 Building (SSV-9)
• Building 48 (SSV-1 and SSV-2)
• Building 50 (SSV-3)
• Regional Training Office (SSV-10)
Analytical results of the sub -slab soil vapor testing indicated that trichloroethylene (TCE) (up to
3,000,000 µg/m3) was detected above the DEQ residential and non-residential Sub -Slab Soil Gas
Screening Levels (SGSLs) in the northern portion of Building 1 (SSV-4 and SSV-5) and the
eastern portion of Building 2 (SSV-11), and above the residential SGSL in Building 48 (SSV-1).
The highest concentration of TICE (3,000,000 µg/m) was detected in sample SSV-5. Chloroform
(1,300 µg/m3) was also detected in Building 1 (SSV-5) above the non-residential and residential
SGSLs, and tetrachloroethylene (PCE) (990 µg/m3) was also detected above the residential SGSL
in Building 1 (SSV-5). The analytical results are summarized in Table 1 and the SSV sample
locations are depicted on Figure 2.
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hart ► hickman
SMARTER ENVIRONMENTAL SOLUTIONS

Mr. Neil Adamson
November 9, 2016
Page 3
3.0 Indoor Air Assessment Activities
3.1 June 2016 Indoor Air Sampling
Based on the results of the SGMP sampling event, H&H conducted IA sampling activities within
Buildings 1, 2, and 48. On June 4, 2016 H&H collected ten IA samples from the following
locations:
• Building 1 (northern portion of the building) — three IA samples were collected in the open
warehouse areas (IAS-2, IAS-4, and IAS-6) and three IA samples (IAS-1, IAS-3, and IAS-
5) were collected in office areas (shipping office, maintenance office, and an employee
office);
• Building 2 (eastern portion of the building) two IA samples (IAS-7 and 8) were collected
in the warehouse area (note — there are no offices located in the eastern portion of
Building 2); and
• Building 48 —two IA samples (IAS-9 and IAS-10) were collected in storage room areas.
In addition, H&H collected one outdoor background sample (BAS-1) to evaluate background
levels of volatile organic compounds (VOC) in outdoor air. On June 4, 2016, prior to sample
collection, H&H measured the wind direction and selected an exterior background location south
of Building 1 due to the recorded wind blowing from the south. The locations of the IA samples
are depicted on Figure 2.
As part of the sampling effort, H&H measured air pressure differential between outside air and the
interior sample locations near the start, middle, and end of the eight -hour sampling period. The
pressure measurements were made using a manometer sensitive to 0.01-inches of water. In
addition, exterior wind speed, exterior wind direction, and indoor/outdoor temperatures were
recorded at the start, middle, and end of the sampling period. Precipitation was not noted
immediately prior to or during the sampling events. A summary of temperature and weather
S:\AAA-Master Projects\ATCO LLC - ATC\Task-010 Indoor Air\IAS Report.docx
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SMARTER ENVIRONMENTAL SOLUTIONS

Mr. Neil Adamson
November 9, 2016
Page 4
recordings is provided in Table 2. In addition, H&H completed the DWM Indoor Air Building
Survey and Sampling Form for each building where IA samples were collected. The forms are
included in Appendix A.
Indoor and background air samples were collected into six -liter Summa canisters. The Summa
canisters were connected to an airflow regulator and a three ft long sampling cane which allowed
sampling to occur at approximately five ft above grade (typical breathing zone). Indoor and
background sample canister valves were opened and the sample collection occurred over an
approximate eight -hour period.
Furthermore, to evaluate worst case conditions, samples were collected on a Saturday when normal
facility operations were halted and no employees were present. Air intake fans for Building 1 were
shut off for the weekend to minimize the exchange of air in the building. Air intake fans in
Building 2 were running during the sampling event.
Following sampling activities, the sample canisters were shipped under a standard chain of custody
to Con -Test Analytical Laboratory (Con -Test) for analysis of PCE, TCE, and their degradation
products 1,1-dichloroethene (1,1-13CE), cis-1,2-dichloroethylene (cis-1,2-DCE), trans-1,2-
dichloroethylene (trans-1,2-DCE), and vinyl chloride. In addition, the samples were analyzed for
chloroform and acrolein. The analysis was performed according to EPA Method TO-15.
Please note that acrolein was included as an analyte because previous indoor air sampling
conducted by Hoffman Engineering, Inc. on behalf of Rite Aid in 2008 indicated acrolein at
concentrations above the DWM Indoor Air Screening Levels (IASLs).
3.2 September 2016 Indoor Air Sampling
Based upon the results of the June 2016 IA assessment (see Section 4.0), and discussions with
DEQ Brownfields, H&H completed additional IA assessment to further evaluate vapor intrusion
in Buildings 1, 2, and 48. In addition, as requested by DEQ, an IA sample was also collected in
the former Boiler House.
S:\AAA-Master Projects\ATCO LLC - ATC\Task-010 Indoor Air\IAS Report.docx
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SMARTER ENVIRONMENTAL SOLUTIONS

Mr. Neil Adamson
November 9, 2016
Page 5
On September 17, 2016, H&H collected 13 IA samples from the following locations:
• Building 1 (south-central portion of the building) — two IA samples were collected in the
open warehouse areas in the southern portion of the building (IAS-22 and IAS-23). These
sample locations were isolated from the northern portion of Building 1 as described below.
• Building 2 (eastern portion of the building) — seven indoor air samples (IAS-I I through
IAS-17) were collected in the warehouse area.
• Building 48 — three indoor air samples (IAS-18, IAS-19, and IAS-20) were collected in
storage room areas. In addition, a duplicate sample (DUP-091716) was collected at the
IAS-19 location.
• Former Boiler House —one indoor air sample (IAS-21) was collected in the lowest level of
the central portion of the building.
In addition, H&H collected two outdoor background samples (BAS-2 and BAS-3) to evaluate
background levels of compounds in outdoor air. Prior to sample collection, H&H measured the
wind direction and selected exterior background locations to the northwest of Building 2 (BAS-3)
and the northeast of Building 1 (BAS-2) due to the recorded wind direction blowing from the north.
The locations of the IA samples and background samples are depicted on Figure 2.
During the September 17, 2016 sampling, H&H collected weather parameters as described in
Section 3.1 and summarized on Table 2. In addition, H&H completed the DWM Indoor Air
Building Survey and Sampling Form for each building where IA samples were collected. The
forms are included in Appendix A.
To evaluate worse case conditions, samples were collected on a Saturday when normal facility
operations were halted and no employees were present in the sampling areas. Air intake fans for
Building 1 were shut off for the weekend to minimize the exchange of air in the building. Because
the June 2016 sampling activities indicated compound concentrations above IASLs in the northern
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SMARTER ENVIRONMENTAL SOLUTIONS

Mr. Neil Adamson
November 9, 2016
Page 6
portion of Building 1, a temporary vapor shield was installed between the northern side of the
building and the southern side of the building where the sampling was conducted. The vapor shield
consisted of plastic sheeting secured to a bay -door and man -door openings that connect the
northern side of the building to the southern side to minimize indoor air exchange between the
northern and southern sides of the building. Air intake fans were shut off on the southern side of
Building 1. The location of the temporary vapor shield is depicted on Figure 2. Following the IA
sampling, the vapor shield was removed.
Indoor and background air samples were collected into six -liter Summa canisters. The Summa
canisters were connected to an airflow regulator and a three ft long sampling cane which allowed
sampling to occur at approximately five ft above grade (typical breathing zone). Indoor and
background sample canister valves were opened and the sample collection occurred over an
approximate eight -hour period.
Following sampling activities, the sample canisters were shipped under a standard chain of custody
to Con -Test for analysis of PCE, TCE, and their degradation products 1,1-DCE, cis-1,2-DCE,
trans-1,2-DCE, and vinyl chloride. In addition, the samples were analyzed for chloroform and
acrolein. The analysis was performed according to EPA Method TO-15.
4.0 Indoor Air Assessment Results
Analytical data from the June 2016 IA sampling was compared to the residential and non-
residential DWM IASLs based on a target cancer risk (TCR) of 1 x 10-5 for potential carcinogenic
effects and a target hazard quotient (THQ) of 0.2 for potential non -carcinogenic effects. The
results indicated that acrolein (1.7 to 5.5 µg/m3) was present in each indoor air sample (IAS-1
through IAS-10) as well as the background sample BAS-1 (2.4 µg/m3) above the IASLs for
residential (0.00417 µg/m3) and non-residential (0.0175 µg/m3) indoor air. TCE was detected
above the residential IASL (0.417 µg/m3) in samples IAS-1 (1.6 µg/m3) and IAS-6 (1.0 µg/m3),
and above the non-residential IASL (1.75 µg/m3) in samples IAS-2 (54 µg/m3), IAS-3 (24 µg/m3),
IAS-4 (19 µg/m3), and IAS-5 (27 µg/m3). The samples with concentrations of TCE above the
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SMARTER ENVIRONMENTAL SOLUTIONS

Mr. Neil Adamson
November 9, 2016
Page 7
IASL were collected in the central and northern portions of Building 1. The June 2016 IA sampling
data is summarized in Table 3 and laboratory analytical data reports are included in Appendix B.
Analytical data from the September 2016 IA sampling indicated only acrolein (0.7 J to 4.8 µg/m3)
was detected above the non-residential IASL (0.0175 µg/m3) in 10 of the 12 IA sample locations.
Note, the September 2016 sampling data includes "J flagged" concentrations, which are estimated
concentrations detected above the laboratory method detection limit, but below the reporting limit.
H&H requested Con -Test to report these J flags concentrations due to the low IASLs for certain
compounds, such as acrolein. Acrolein was also detected above the non-residential IASL in
background samples BAS-2 (0.90 J) and BAS-3 (0.50 J). No other compounds, including TCE,
were detected above the residential or non-residential 1ASLs in the September 2016 IA samples.
The September 2016 IA sampling data is summarized in Table 3 and laboratory analytical data
reports are included in Appendix B.
The duplicate sample (DUP-09-17-16) had similar concentrations to the parent sample, IAS-19,
which indicates good laboratory repeatability. The duplicate and parent sample data is
summarized in Table 3.
Because acrolein was detected in the background air sample it is likely that the detections are not
associated with subsurface vapor intrusion. To further confirm this, in September 2016, H&H
requested that Con -Test report acrolein from the SSV samples collected in April 2016. The re-
analysis/revised report indicated that acrolein was not detected above laboratory method detection
limits in the SSV samples. Because acrolein was not detected in the SSV samples, it is highly
unlikely that the IA concentrations of acrolein inside the buildings are a result of vapor intrusion
from the sub -surface. Furthermore, literature review indicates that acrolein is very common in air
in urban areas because it is a by-product of petroleum and tobacco combustion. In its 2007
Toxicological Profile for acrolein, the Agency for Toxic Substances and Disease Registry
(ATSDR) reported average ambient air concentrations up to 7 µg/m3 and average indoor air
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SMARTER ENVIRONMENTAL SOLUTIONS

Mr. Neil Adamson
November 9, 2016
Page 8
concentrations up to 29 µg/m3. Propane forklifts and other motorized equipment are used around
the site and at the surrounding properties.
Results of the differential pressure measurements collected during the IA sampling events indicate
that during both sampling events, there was a positive differential pressure between indoor and
outdoor air in the buildings where samples were collected.
5.0 Summary and Recommendations
In June 2016 and September 2016, H&H performed IA sampling to evaluate the potential for vapor
intrusion in Buildings 1, 2, 48, and the former Boiler House due to the presence of chlorinated
solvent groundwater impacts at the Rite Aid Facility. The data indicates that samples collected
from the central and northern portions of Building 1 contained concentrations of TCE above the
DEQ residential and non-residential IASLs. TCE was not detected above the residential IASL in
the southern portion of Building 1, or in Buildings 2, 48, and the former Boiler House. Acrolein
was detected above the non-residential IASL in 21 of the 23 sample locations and in the three
background samples. Based upon the lack of acrolein detected in SSV samples, the common
occurrence of acrolein in ambient and indoor air as a result of tobacco and petroleum product
combustion, and the detection of acrolein in the background samples, H&H concludes that acrolein
is not associated with vapor intrusion from the sub -surface.
Based on the results of SSV and IA sampling activities, H&H recommends implementation of
vapor mitigation controls in the northern portion of Building 1 prior to occupancy. Vapor
mitigation controls are not warranted for the southern portion of Building 1 (when isolated rom
the northern portion of Building 1) or other buildings of the Site.
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SMARTER ENVIRONMENTAL SOLUTIONS

Mr. Neil Adamson
November 9, 2016
Page 9
Should you have any questions or require additional information concerning this report, please feel
free to contact us at [phone].
Very truly yours,
Hart & Hickman, PC
Matt Ingalls
Project Manager
Attachments
S \AAA -Master Projects\ATCO LLC - ATC\Task-010 Indoor Air\IAS Report_docx
Pti
(4
14
hart hickman
SMARTER ENVIRONMENTAL SOLUTIONS

Table 1
Summary of Sub -Slab Soil Gas Analytical Results
Rite Aid Facility
Charlotte, North Carolina
H&H Job No. ATL-001
Soil Gas ID
Date
Location
SSV-1
4/22/2016
Building #48
SSV-2
4/22/2016
Building #48
SSV-3
4/22/2016
Building #50
SSV-4
4/25/2016
Building #1
SSV-5
4/25/2016
Building #1
SSV-6
4/25/2016
Building #1
SSV-7
4/25/2016
Building #3
SSV-8
4/25/2016
Building #3
SSV-9
4/22/2016
Building T-26
SSV-10
4/22/2016
Executive Office
SSV-11
4/25/2016
Building #2
SSV-12
4/25/2016
Building #2
Screening Criteria' (µg/m')
VOCs TO-15 (ug/m')
DWM VISLs
Residential
Non -Residential
Acetone
19
27
<19
67 J
<190
23
18 J
110
62
32
58
61
216,000
2,720,000
Acrolein
<2.8
<2.8
<2.8
<28
<28
<2.8
<2.8
<2.8
<2.8
<2.8
<2.8
<2.8
0.139
1.75
Benzene
1.4
<0.64
<0.64
<6.4
15
0.65
1.3
0.37 J
<0.64
1.1
1.0
<0.45 J
120
1,570
2-Butanone (MEK)
5.0 J
3.7 J
0.86 J
<240
4.6 J
5.4 J
4.4 J
6.7 J
5.4 J
3.1 J
1.9 J
4.0 J
34,800
438,000
Carbon disulfide
4.4 J
0.98 J
0.85 J
<62
<62
0.56 J
0.56 J
<6.2
0.85 J
2.6 J
0.57 J
0.62 J
4,870
61,300
Carbon Tetrachloride
0.60 J
0.63 J
0.53 J
<13
10.1
<1.3
<1.3
0.35 J
0.45 J
<1.3
12
<1.3
156
2,040
Chloroform
1.3
<0.98
<0.98
30
1 0000
<0.98
1.8
0.47 J
<0.98
<0.98
5.8
<0.98
40.7
533
Chloromethane
0.45 J
0.56 J
<0.83
<8.3
<8.3
0.40 J
<0.83
0.25 J
0.45 J
0.52 J
0.38 J
0.40 J
626
7,880
1,3-Dichlorobenzene
<1.2
<1.2
0.34 J
<12
<12
0.41 J
<1.2
<1.2
0.43 J
<1.2
0.55 J
0.55 J
NE
NE
Dichlorodifluoromethane (Freon 12)
2.7
2.8
2.7
<9.9
<9.9
2.8
2.7
3.1
2.8
2.9
2.7
2.8
695
8,760
1,2-Dichloroethane
0.29 J
<0.81
<0.81
<8.1
<8.1
<0.81
<0.81
<1.2
<0.81
<0.81
<0.81
<0.81
36
472
cis-1,2-Dichloroethylene
<0.79
<0.79
<0.79
<7.9
20
<0.79
0.33 J
<0.79
<0.79
<0.79
<0.79
<0.79
NE
NE
trans-1,2-Dichloroeth Iene
0.38 J
<0.79
<0.79
<7.9
33
<0.79
<0.79
<0.79
<0.79
<0.79
<0.79
<0.79
NE
NE
Ethanol
44
380
140
690
610
460
110
1,100
310
450
1400
130
NE
NE
Ethyl acetate
5.0
1.2
2.1
<7.2
<7,2
<0.72
1.2
<0.72
1.0
3.6
<0.72
23
487
6,130
Ethylbenzene
11
0.38 J
0.56 J
<8.7
<8.7
<0.87
<0.87
<0.87
0.97
3.1
<0.87
0.36 J
374
4,910
4-Eth (toluene
0.31 J
<0.98
<0.98
<9,8
<9.8
<0.98
<0.98
<0.98
<0.98
<0.98
<0.98
0.88 J
NE
NE
Heptane
0.51 J
<0.82
<0.82
<8.2
<8.2
<0.82
0.33 J, V-06
<0.82
<0.82
0.30 J, V-06
<0.82
0.57 J, V-06
NE
NE
Hexane
<28
<28
<28
<280
<280
<28
<28
<28
<28
1.7 J, L-03, V-05
<28
<28
4,870
61,300
2-Hexanone (MBK)
0.70 J
0.51 J
<0.82
<8.2
<8.2
0.82
0.84
0.41 J
0.79 J
<0.82
0.31 J
<0.82
209
2,360
Iso ro anol
4.2 J
6.2 J
2.0 J
7.3 J, L-03
9.0 J, L-03
5.4 J
2.7 J
14 J
8.2 J
8.3 J
24
7.3 J
1,390
17,500
Methyl tert-Butyl Ether
<0.72
<0.72
<0.72
<7.2
<0.72
0.32 J, L-03
<0.72
1.0 L-03
<0.72
<0.72 L-03
0.40 J, L-03
<0.72 L-03
3,600
47,200
Methylene Chloride
2.2 J
2.5 J
2.6 J
<69
<69
1.5 J
1.5 J
3.2 J
4.0 J
8.4
2.6 J
4.0 J
4,170
52,600
4-Methyl-2-pentanone (MIBK)
0.82
<0.82
<0.82
<8.2
<8.2
0.34 J
0.38 J
1.0
0.61 J
0.29 J
0.28 J
0.44 J
20,900
263,000
Naphthalene
<1.0
<1.0
<1.0
<10
<10
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
5.5
20.9
263
Propene
2.7 J
3.3 J
<14
<140
19 J
1.8 J
1.8 J
<14
<14
1.2 J
1.1 J
1.4 J
20,900
263,000
Styrene
0.39 J
<0.85
<0.85
<8.5
<8.5
<0.85
<0.85
<0.85
<0.85
<0.85
<0.85
<0.85
6,950
87,600
Tetrachloroethene
98
1.2 J
0.81 J
110
990
3.3
36
33
<1.4
0.43 J
9.0
1.0 J
278
3,500
Tetrah drofuran
<0.59
<0.59
<0.59
<5.9
<5.9
<0.59
<0.59
0.27 J
0.40 J
<0.59
0.48 J
<0.59
13,900
175,000
Toluene
120
4.0
7.0
<7.5
<7.5
0.51 J
1.1
0.74 J
10
44
1.4
11
34,800
438,000
Trichloroethene
20
0.80 J
0.45 J
34.000
3,0 00,000
13
2.1
<1.4
1.6
1.5
730
0.86 J
13.9
175
Trichlorofluoromethane (Freon 11)
1.6 J
2.0 J
1.4 J
36 J
<45
1.8 J
1.6 J
3.5 J
2.0 J
110
4.9
2.1 J
NE
NE
1,1,2-Trichloro-1,2,2-trifluoroethane Freon 113
0.77 J
0.61 J
0.80 J
<61
<61
0.71 J
6.4
750
0.58 J
0.64 J
1.6 J
0.83 J
209,000
2,630,000
1,2,4-Trimethylbenzene
2.1
0.59 J
0.51 J
<9.8
<9.8
0.71 J
0.92 J
0.94 J
0.90 J
0.59 J
0.94 J
12
48.7
613
1,3,5-Trimeth (benzene
0.31 J
<0.98
<0.98
<9.8
<9.8
<0.98
<0.98
<0.98
<0.98
<0.98
<0.98
4.9
NE
NE
m&p-Xylene
41 V-06
1.5 J, V-06
2.2 V-06
<17
<17
<1.7
0.47 J, V-06
<1.7
4.6 V-06
13 V-06
0.76 J, V-06
2.7 V-06
695
8,760
o- Xylene
8.1
0.49 J
0.69 J
<8.7
<8.7
<0.87
<0.87
0.30 J
1.5
2.3
0.38 J
0.71 J
695
8,760
Notes:
1. Screening critera based on the NC Division of Waste Management Vapor Intrusion Screening Levels (DWM VISL - March 2016)
2. Acrolein non -detect concentrations reported to the laboratory method detection limit (MDL)
Bold indicates exceedance of the Residential VISL
Underline indicates exceedance of the Non -Residential VISL
µg/m3 = micrograms per cubic meter
NE = Not Established
Samples were collected into 3-L Summa cannisters and analyzed by EPA Method TO-15 over a 15 minute interval
SSV = Sub Slab Soil Gas
VOCs = Volatile Organic Compounds
J = Indicates concentration detected above the laboratory MDL, but below the laboratory reporting limit, therefore it is an estimated concentration
L-03 = Indicates laboratory fortified blankllaboratory control sample recovery is outside of control limits. Reported value for this compound is likely to be biased on the low side
V-06 = Indicates continuing calibration did not meet method specifications and was biased on the high side for this compound
$.W-MasterProjwMTCOLLC-ATOTask-010l,dmr Air,Tablea\$oilgas table.xlsS$V Table 1
Date:10/11/2016 Hart & Hickman, PC

Table 2
Summary of Outdoor and Indoor Air Monitoring Field Data
Rite Aid Facility
Charlotte, North Carolina
H&H Job No. ATL-001
Outdoor Measurements
Sample
Date
Time
Temperature
CF)
Sample Location
Precipitation
(inches)
Barometric Pressure
(in. Hg)
Wind Direction
Wind Speed
(mph)
6/4/2016
Be innin
77
Southern side of
Buirling #1
0.00
29.92
S
4
Middle
93
0.00
29.90
S
5
End
gg
0.00
29.92
S
7
9/17/2016
Beginning
70
Between Buildings #1
and#2
0.00
30.19
N - NE
2-4
Middle
81
0.00
30.17
N - NE
4-6
End
89
0.00
30.08
N-NW
4-5
Indoor Measurements
Sample
Date
Time
Temperature
CF)
Sample Location
Sample ID
Differential Pressure
(inches of water)
6/4/2016
Be i ning
78
Exterior -On south side of Building #1 (upwind of each building)
BAS
NA
NA
Middle
92
End
96
NA
6/4/2016
Beginning
82
Building #1 Shipping Office
IAS-1
0.007
0.006
0.008
Middle
86
End
89
6/4/2016
Beginning
Middle
83
Building #1 Northern Warehouse Area
IAS-2
0.008
85
0.009
0.008
End
88
6/4/2016
Beginning
83
Building # 1 Maintenance Office
IAS-3
0.009
Middle
86
0.010
0.009
End
89
6/4/2016
Beginning
84
Building #1 Central Warehouse Area
IAS-4
0.003
0.003
0.005
Middle
84
End
85
6/4/2016
Beqinninq
83
Building #1 Employee Office
IAS-5
0.006
0.006
0.007
Middle
86
End
88
6/4/2016
Beginning
83
Building #1 Southern Warehouse Area
IAS-6
0.015
Middle
84
0.016
0.009
End
88
6/4/2016
Beginning
84
Building #2 Central Warehouse Area
IAS-7
0.021
0.017
0.017
Middle
85
End
92
6/4/2016
Beginning
84
Building #2 Eastern Warehouse Area
IAS-8
0.011
Middle
86
0.013
0.017
End
91
6/4/2016
Beginning
85
Building #48 West/Central Storage Room
IAS-9
0.005
Middle
91
0.009
0.006
End
91
6/4/2016
Beginning
87
Building #48 Central Storage Room
IAS-10
0.004
0.007
0.006
Middle
91
End
92
9/17/2016
Beginning
80
Building #2 - Central and Eastern Warehouse Area
IAS-11, IAS-12, IAS-
13, IAS-14, IAS-15,
IAS-16, IAS-17
0.022
0.029
0.027
Middle
82
End
92
9/17/2016
Beginning
82
Building #48 - Entire Building
IAS-18
IAS-19 / DUP
IAS-20
0.001
0.003
0.004
Middle
90
End
92
9/17/2016
Be innin
80
Building #50 - Former Boiler House
IAS-21
0.000
0.000
0.000
Middle
92
End
91
9/17/2016
Be innin
82
Building #1 SouthernWarehouse Area
IAS-22
IAS-23
0.008 -0.006
0.007 0.005
Middle
84
End
86
0.006 0.008
Notes:
Information from on -site weather station set up by H&H on June 4, 2016 and September 17, 2016.
Indoor air differential pressure measured between buildings and outside air. Positive value indicates that the pressure in the building was higher than the outside pressure.
Parentheses indicate the differential pressure measured between the active and sampling sides of Building 1. Positive value indicates a postive pressure on the sampling side.
Wind direction indicated source direction, i.e. south wind is blowing from south to north.
Beginning refers to times of approximately 0800 to 0900 at start of sampling
Mid refers to times of approximately 1200 to 1300 at midpoint of sampling
End refers times of approximately 1600 to 1700 at endpoint of sampling
NA = Not Applicable; -- = Not Measured
Table 2
Hart & Hickman, PC

Table 3
Summary of Indoor Air Analytical Results
Rite Aid Facility
Charlotte, North Carolina
H&H Job No. ATL-001
Indoor Air Sample ID
IAS-1
IAS-2
IAS-3
IAS-4
IAS-5
IAS-6
IAS-7
IAS-8
IAS-9
IAS-10
BAS-1
Date
6/4/2016
6/4/2016
6/4/2016
6/4/2016
6/4/2016
6/4/2016
6/4/2016
6/4/2016
6/4/2016
6/4/2016
6/4/2016
Sampling Height
5-ft
5-ft
5-ft
5-ft
5-ft
5-ft
5-ft
5-ft
5-ft
5-ft
5-ft
Indoor Air Screening Levels j31
3
(µg/m
Building #1
Building #1
Building #1
Building #2
Building #2
Building #1
Building # 1
Building #1
Building #48
Building #48
Background
Location
Shipping
Northern
Maintenance
Central
Employee
Southern
Central
Eastern
West/Central
Central
Sample South
Office
Warehouse
Office
Warehouse
Office
Warehouse
Warehouse
Warehouse
Storage Room
Storage Room
of Building #1
Area
Area
Area
Area
Area
VOCs (TO-15)
Residential
Non -Residential
Acrolein
4.5
3.3
5.0
3.5
5.5
1.9
1.7
2.5
2.3
2.7
2.4
0.00417
0.0175
Chloroform
0.22
0.29
0.25
0.28
0.26
0.22
<0.17
<0.17
<0.17
<0.17
<0.17
1.22
5.33
1,1-Dichloroethylene
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
41.7
175
cis-1,2-Dichloroethylene
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
NS
NS
trans-1,2-Dichloroethylene
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
NS
NS
Tetrachloroethene
<0.24
0.73
0.33
0.36
0.36
<0.24
0.27
0.33
0.49
5.0
<0.24
8.34
35
Trichloroethylene
1.6
54
24
19
27
1.0
<0.19
<0.19
<0.19
0.31
<0.19
0.417
1.75
Vinyl Chloride
<0.090
<0.090
<0.090
<0.090
<0.090
<0.090
<0.090
<0.090
<0.090
<0.090
<0.090
2.30
27.9
Indoor Air Sample ID
Date
Sampling Height
IAS-11
9/17/2016
5-ft
IAS-12
9/17/2016
5-ft
IAS-13
9/17/2016
5-ft
IAS-14
9/17/2016
5-ft
IAS-15
9/17/2016
5-ft
IAS-16
9/17/2016
5-ft
IAS-17
9/17/2016
5-ft
IAS-18
9/17/2016
5-ft
IAS-19 / DUP-9-17-16
9/17/2016 9/17/2016
5-ft 5-ft
IAS-20
9/17/2016
5-ft
IAS-21
9/17/2016
5-ft
IAS-22
9/17/2016
5-ft
IAS-23
9/17/2016
5-ft
BAS-2
9/17/2016
5-ft
BAS-3
9/17/2016
5-ft
Indoor Air Screening Levels j31
Building #2
Building #2
Building #2
Building #2
Building #2
Building #2
Building #2
Building #1
Background
Background
3
(µgym )
Building #48
Building #48
Building #48
Building #48
Northeastern
Eastern
Southeastern
East/Central
East/Central
North/Central
South/Central
Former Boiler
Building #1 Southern
Southern
Sample
Sample
Location
Warehouse
Warehouse
Warehouse
Warehouse
Warehouse
Warehouse
Warehouse
Eastern
Storage Room
East/Central
Storage Room
East/Central
Storage Room
Western
Storage Room
House
Warehouse Area
Warehouse
Northeast of
Northwest of
Area
Area
Area
Area
Area
Area
Area
Area
Building #1
Building #2
VOCs (TO-15)
Residential
Non -Residential
Acrolein
1.2 J
<1.6
0.75 J
<1.6
3.6
4.0
4.3
2.8
1.2 J
1.5 J
0.7 J
<1.6
1.4 J
4.8
0.90 J
0.50 J
0.00417
0.0175
Chloroform
0.082 J
0.20
0.072 J
0.072 J
0.082 J
0.086 J
0.089 J
0.072 J
0.088 J
0.073 J
0.082 J
0.086 J
0.082 J
0.079 J
0.086 J
0.082 J
1.22
5.33
1,1-Dichloroethylene
<0.14
0.12 J
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
<0.20
<0.20
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
41.7
175
cis-1,2-Dichloroethylene
<0.14
0.11 J
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
<0.20
<0.20
<0.14
<0.14
<0.14
<0.14
<0.14
0.083 J
NS
NS
trans-1,2-Dichloroethylene
<0.14
0.10 J
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
<0.20
<0.20
<0.14
<0.14
<0.14
<0.14
<0.14
<0.14
NS
NS
Tetrachloroethene
0.11 J
0.31
0.13 J
0.071 J
0.090 J
0.116 J
0.090 J
0.081 J
<0.34
<0.34
0.071 J
0.076 J
0.086 J
0.086 J
0.095 J
0.100 J
8.34
35
Trichloroethylene
0.21
0.34
0.17 J
0.12 J
0.21
0.11 J
0.15 J
<0.19
0.24 J
0.23 J
0.11 J
<0.19
0.37
0.30 J
<0.19
<0.19
0.417
1.75
Vinyl Chloride
<0.090
0.072 J
<0.090
J00
<0.090
<00090
<0.090
<0.090
<0.13
<0.13
<0.090
<0.090
<0.090
<0.090
<0.090
<0.090
2.30
27.9
Notes:
1. Screening critera based on the NC Division of Waste Management Vapor Intrusion Screening Levels (DWM VISL - March 2016)
(TCR = 1 x 10-5, THQ = 0.2)
Bold indicates exceedance of the Residential IASL
Underline indicates exceedance of the Non -Residential IASL
Gray indicates compound not detected above the indicated detection limit
TCR = Target Cancer Risk; THQ = Target Hazard Quotient
µg/l = micrograms per cubic meter; IASL=Indoor Air Screening Level
NS = Not Specified; Not Applicable
Samples were collected into 6-L Summa cannisters and analyzed by EPA Method TO-15 over an 8 hour interval
IAS = Indoor Air Sample
VOCs = Volatile Organic Compounds
J flag indicates an estimated concentration above the method detection limit, but below the reporting limit
Table �+3
File Dale: AAA 01MOasler ProjecWATCO LLC - ATMTask-010 Indoor Air\Tables\Indoor Air Table -revised Sept 2016Table 3 - IA Analytical Hart &Hickman, PC

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CHARLOTTE EAST, NC
1967
REVISED/INSPECTED 1988
AND
DERITA, NC 1993
QUADRANGLE
7.5 MINUTE SERIES (TOPOGRAPHIC)

SITE PROPERTY BOUNDARY
ESTIMATED SOLVENT PLUME
OFFICE AREAS
® INDOOR AIR SAMPLE LOCATION
(HOFFMAN ENGINEERING INC; 2008)
® BACKGROUND AIR SAMPLE LOCATION
® SUB -SLAB SOIL VAPOR SAMPLE LOCATION
® INDOOR AIR SAMPLE LOCATION
® BACKGROUND AIR SAMPLE LOCATION
' r
4�. Lill'"
t� yY rn d 4
•
FORMER BOILER
HOUSE
• i
� IAS-21 =� BUILDING#48 4k� W ,
BAS-3
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•� . � -- - ��r IAS-18 ._ t
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BAS 2 11.`
SSV-12
SSV-3
TNS-11 1 I '07
IAS-16 �_
SSV-11 4 1
IAS-14 - _
IAS-7 - SHIPPING OFFICE
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BREAKROOM/
IAS-15 3 IAS-1 r f(f
IAS-17 ' ® RESTROOMS 1i .:{a k a
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26
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INDOOR AIR SAMPLING EVENT)
2. INDOOR AIR SAMPLES (IAS-1 THROUGH IAS-10) AND
BACKGROUND AIR SAMPLE (BAS-1) SAMPLED IN JUNE 2016.
3. INDOOR AIR SAMPLES (IAS-11 THROUGH IAS-23) AND
BACKGROUND AIR SAMPLES (BAS-2 AND BAS-3) SAMPLED IN
SEPTEMBER 2016.
4. DURING JUNE 2016 INDOOR AIR SAMPLING EVENT, THE WIND
DIRECTION WAS FROM THE SOUTH.
5. DURING SEPTEMBER 2016 INDOOR AIR SAMPLING EVENT, THE
WIND DIRECTION WAS FROM THE NORTH.
v
8
INDOOR AIR SAMPLE LOCATION MAP
RITE AID FACILITY
APPROXIMATE
0 180
360 1776 STATESVILLE AVENUE
77
SCALE IN FEET
MONOMER
CHARLOTTE, NORTH CAROLINA
h� .} 2923 South Tryon Street -Suite 100
art hackman
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(o
SMARTER ENVIRONMENTAL SOLUTIONS License # C-1269 / #C-245 Geolog}'
DATE: 9-26-16 REVISION NO. 0
JOB NO. ATL-001 FIGURE NO. 2
a
a
a

Appendix B
Proposed Development Plans

BUILDING AREAS
aaaa Qa
I L -
3o
-r
I I I
I I I
R-11%
SUITE 103 d, SUI 104 SUITE 105 hi SUI 1 6
II TI
m rrr
ti
1
I I I I I ! I
I I 1 I 1 I I II �UITE 100 m�
7TIITTI m TT I m7�I llILLL
7171
7f
-LIJ U
�W
ITTI
W
7 -
I I I I I
S20 S19 S18 S117 S1 � S15 S114 S13 S12 S1 1 S10 S9 S� S7 Ski S5 S41 S S2 S1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
n-- --- ----------
I I I I I I
4�(-2 2-8
T
M
=�5 =Z
4
©zaIIIII
-7�
LEASING PLAN B - SOUTH
SCALE: 1 /32" = 1 '-0"
SUIT
SUITE 107 SUITE 111
I I I
SUIT 112
I I I I
• • _ • •
4a-
LEASING PLAN B - NORTH
B
C
D
E
F
G
H
I
K
DN-
USABLE AREA - LEASING PLAN B
Name Area Rentable Area
SUITE 100
73311.86 SF
86507.99 SF
SUITE 103
1547.25 SF
1825.75 SF
SUITE 104
1563.97 SF
1845.49 SF
SUITE 105
1564.27 SF
1845.84 SF
SUITE 106
1552.98 SF
1832.52 SF
SUITE 107
13396.31 SF
15807.65 SF
SUITE 110
2368.57 SF
2794.91 SF
SUITE 111
2373.58 SF
2800.83 SF
SUITE 112
2385.90 SF
2815.36 SF
201 CAMP ROAD
SUITE 100a
2299.71 SF
2713.66 SF
SUITE 101
19569.41 SF
23091.91 SF
SUITE 102
1510.55 SF
1782.45 SF
SUITE 103
1039.79 SF
1226.95 SF
SUITE 104
1023.66 SF
1207.92 SF
SUITE 105
1023.66 SF
1207.92 SF
SUITE 106
1422.94 SF
1679.07 SF
SUITE 110
1067.39 SF
1259.52 SF
SUITE 111
1068.84 SF
1261.23 SF
701 KESWICK AVE
NOTE 1: USABLE AREAS ARE MEASURED PER BOMA'S OFFICE
STANDARDS: TO DOMINANT FACE OF INTERIOR WALLS/GLASS
MEASURED AT 5-0" ABOVE FLOOR LEVEL
NOTE 2: RENTABLE AREAS ARE CALCULATED USING A 1.18 (18%) CORE
FACTOR
A R C H I T E C T U R E
BEACHAM BUNCE + MANLEY ARCHITECTURE PLLC
1435 WEST MOREHEAD STREET
SUITE 160
CHARLOTTE, NC 28208
704.334.1716
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LOCATION / CHARLOTTE, NC
PROJECT # / 18ACO230
DATE / 10.30.2020
DRAWN / PT
COPYRIGHT 2020 BB+M ARCHITECTURE PLLC.
Revisions
No. I Description Date
LEASING PLAN B -
PROPOSED
10/30/2020 11:30:59 C:\Users\ptormeno\Documents\Revit Local Files\Building 2_CENTRAL (Revit 2020)[e-mail]
AM
SCALE: 1 /32'' = 1 '-0''
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