26063_A&A Truck and Auto_Assessment WP_20230731

FROEHLING 4+
ROBERTSON
Assess. Manage. Consult.
Brownfields Assessment Work Plan
A&A Truck & Auto (A.K.A. Birchway West CLT) (NCBP #26063-22-060)
8501 Wilkinson Boulevard and 3900, 3940, and 4000 Sam Wilson Road
Charlotte, North Carolina
Prepared For:
Greystar Development East, LLC
521 East Morehead Street, Suite 400
Charlotte, North Carolina 28204
Issue Date: July 28, 2023
Revision 2
F&R Project Number: 59A-0290
F&R Geology License Number: C-124
Prepared By:
yw,'� A;1,10-
Lucas H. Powell
Environmental Scientist
Reviewed By:
Brian T. Olin, PG
GeoEnvironmental Practice Leader
A Minority -Owned
Business

f&R
July 28, 2023
FROEHLING & ROBERTSON, INC.
Engineering Stability Since 1881
3300 International Airport Drive, Suite 600
Charlotte, North Carolina 28208
T 704.596.2889 1 F 704.596.3784
NCDEQ— Brownfields Redevelopment Section
610 E. Center Avenue
Suite 301
Mooresville, NC 28115
Attn: Ms. Carolyn Minnich
Re: Brownfield Assessment Work Plan (Revision 2)
A&A Truck & Auto (a.k.a. Birchway West CLT) (NCBP #26063-22-060)
8501 Wilkinson Boulevard and 3900, 3940, and 4000 Sam Wilson Road
Charlotte, North Carolina
F&R Project No. 59A-0290
Dear Ms. Minnich:
Froehling & Robertson, Inc. (F&R) proposes to perform additional limited soil, soil -gas, and groundwater
assessment at the property assemblage located at Wilkinson Boulevard and Sam Wilson Road in Charlotte,
North Carolina, herein referred to as the Subject Property. The purpose of this assessment is to collect
additional data in support of a Brownfield Agreement for the Property based on F&R's opinion of the
additional assessment needed to adequately assess the Subject Property. In accordance with Brownfield
requirements, F&R on behalf of Greystar Development East, LLC, the Prospective Developer (PD), has
prepared this work plan for the proposed assessment. F&R understands that a Brownfields Project
Manager has not yet been assigned. F&R has prepared this work plan to proceed with the project per the
Brownfields kick-off meeting on May 17, 2023 while awaiting assignment of a Brownfields Project
Manager to maintain the proposed project schedule and in accordance with Brownfields' Minimum
Requirements Checklist for Site Assessment Work Plans and Reports dated March 2023.
Certification:
I, Brian T. Olin, a Licensed Geologist for Froehling and Robertson, Inc., do certify that the
information contained in this report is correct and accurate to the best of my knowledge.
Froehling and Robertson, Inc. is licensed to practice geology/engineering in North Carolina. The
certification number of the company is C-124.
Corporate HQ: 3015 Dumbarton Road Richmond, Virginia 23228 T 804.264.2701 F 804.264.1202 www.fandr.com
VIRGINIA * NORTH CAROLINA • SOUTH CAROLINA * MARYLAND • DISTRICT OF COLUMBIA
A Minority -Owned Business

INTRODUCTION
The Subject Property is located at the southwest corner of Wilkinson Boulevard and Sam Wilson Road,
and addressed as 8501 Wilkinson Boulevard and 3900, 3940, and 4000 Sam Wilson Road in Charlotte,
Mecklenburg County, North Carolina, herein referred to as the Subject Property. The Subject Property
location is shown on Figure 1: Topographic Property Location Map, and Figure 2: Subject Property
Observation Map.
According to the Mecklenburg County GIS, the Subject Property consists of four contiguous parcels of land
comprising 15.92 acres, and is located at 8501 Wilkinson Boulevard and 3900, 3940, and 4000 Sam Wilson
Road in Charlotte, Mecklenburg County, North Carolina. The Subject Property consists of grass -covered
and wooded land with multiple parking lots, an approximately 41,000 square -foot warehouse building,
and an approximately 2,950 square -foot office building with a basement. The Subject Property is identified
by Mecklenburg County PID numbers:
• 113-046-09,
• 113-046-10,
• 113-046-95, and
• 113-046-07.
The Subject Property is situated in a suburban area of commercial, industrial, and residential land use in
Charlotte, North Carolina. The Subject Property is bordered to north by Wilkinson Boulevard, beyond
which are Al Powder Coating (metal painter), Total Packaging Company, Gaston Screen Printing, and Paul
Norman Co Inc (sheet metal contractor); to the south by Braddock Metallurgical (metal heat treating),
beyond which is cleared and wooded land; to the east by Sam Wilson Road, beyond which are DyStar
Carolina Chemical (chemical manufacturer) and Mobil (filling station); and to the west by Progressive
Service Company (plumber) and CrossFit Wreckage (gym), beyond which is cleared and wooded
land. Based on F&R's review of the 2019 United States Geological Survey (USGS) Charlotte -West, NC
Quadrangle Map, the contour lines in the area indicate the Subject Property generally slopes to the south-
southwest and southwest. The direction of shallow groundwater flow in the vicinity of the Subject
Property is inferred to be to the south-southwest and southwest.
The currently proposed redevelopment plans consist of ten three-story residential apartment buildings, a
clubhouse, and pool. The complex will consist of 378 for -rent, workforce housing units. The buildings will
consist of slab on grade construction with no basements or crawl spaces. All parking will be above grade
surface parking. Ground floor uses will include leasing office and clubhouse facilities for the apartments,
residential apartment units, and common areas. The proposed redevelopment plan is included as Figure
3. Actual building numbers have not been assigned, so F&R has designated the apartment buildings as
Buildings 1-9 and Clubhouse temporarily for identification purposes. The temporarily assigned building
numbers and proposed square footage is depicted in the below Table: Building Square Footage. The
temporarily assigned building numbers are depicted on the attached Figure 3.
Greystar Development East, LLC
Wilkinson Boulevard and Sam Wilson Road
Charlotte, North Carolina
A&A Truck & Auto (NCBP# 26063-22-060) Work Plan
F&R Project No. 59A-0290
July 28, 2023
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Table: Building Sauare Footage
Building
Number
Units Per
Building
Approximate
Square Footage
First Floor
(Sq. Ft)
Total Living Space
Square Footage
(3 Floors)
(Sq. Ft)
1
30
12,000
28,900
2
54
18,500
52,000
3
54
18,500
52,000
4
30
12,000
28,900
5
54
18,500
52,000
6
54
18,500
52,000
7
42
20,000
40,470
8
30
12,000
28,900
9
30
12,000
28,900
Clubhouse
N/A
5,100
N/A
F&R previously completed a Phase I ESA on the Wilkinson Boulevard — Allison Property dated March 15,
2022 (F&R Project No. 59A-0077). During the Phase I ESA, the following recognized environmental
conditions (RECs) were identified in association with the Subject Property.
• Based upon F&R's review of historical sources and interviews, the Subject Property appears to
have been developed with the current warehouse building structure since 1989. Since 1989, the
Subject Property has utilized the structure as an automotive repair, body shop, and scrapyard.
Specifically, the facility has been utilized by A & A Truck & Auto Center Inc (1994-2009), AATAC
Hydraulic Wreckers (1994-2009), Hartsell Bros Fence Co Inc (1999), Carolina Wrecker Sales (2014),
and Sterling Paint & Body (2017). Based upon the long period of environmentally sensitive
industrial use this former Subject Property usage is considered a REC.
• The adjacent site to the east-northeast across Sam Wilson Road addressed as 8309 Wilkinson
Boulevard located topographically cross to upgradient, formerly operated as American Cyanamid,
Freedom Textile Chemicals Company, and Dystar Chemical (the current occupant). Dystar
Chemical was identified on numerous federal and state databases. The site was evaluated for
inclusion on the EPA Superfund list associated with numerous chemicals historically used at this
facility. Annual groundwater monitoring is required by the NCDEQ at the Dystar facility in
connection with a RCRA permit at the facility. Concentrations in the monitoring wells nearest to
the Subject Property were 95 ug/L of 1,4-Dioxane, 17 ug/L of Chromium, and 390 ug/L of iron
during the most recent monitoring event. Based on the most recent groundwater monitoring
report, this facility is considered a REC of the Subject Property. Numerous incidents and
assessments associated with this facility are further discussed in the Section 5.1. In addition,
based upon the documented soil and groundwater contamination at this facility, a VEC is likely to
exist.
Greystar Development East, LLC
Wilkinson Boulevard and Sam Wilson Road
Charlotte, North Carolina
A&A Truck & Auto (NCBP# 26063-22-060) Work Plan
F&R Project No. 59A-0290
July 28, 2023
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• The facility located at 8425 Wilkinson Boulevard across Sam Wilson Road to the east-northeast of
the Property, which formerly operated as Wilkinson Boulevard Amoco, was identified on the state
UST database. Three 6,000 gallon single -wall steel gasoline USTs and one 1,000 gallon single -wall
steel kerosene UST were installed in 1983. This facility appears to have been recently closed and
there is no indication that these USTs have been removed. While there are no releases associated
with this facility, based on the age of the USTs (39 years), the distance, and the anticipated
groundwater flow direction towards the Subject Property based on topography, this gasoline
service station is a REC of the Subject Property.
• The former Exxon facility located at 3813 Sam Wilson Road across the intersection with Wilkinson
Boulevard adjacent and upgradient to the northeast of the Subject Property was identified in the
UST database. Two 15,000, and one 10,000 gallon USTs were installed in 2000. While the building
has been demolished, there is no record of closure of the USTs in accordance with NCDEQ
requirements, or compliance records available for these USTs during the time of operation. Based
on the unknown status and condition of the USTs associated with this former gasoline service
station, close proximity to the Subject Property, the anticipated groundwater flow direction
towards the Subject Property based on topography, and the lack of proper regulatory compliance
records for these USTs, this facility is a REC of the Subject Property.
Based upon the above RECs, F&R recommended additional assessment to determine if soil and
groundwater have been adversely impacted by the historical use and adjacent facilities, and if a vapor
intrusion risk is present. F&R performed a Limited Soil, Groundwater, and Soil Gas Assessment at the
Subject Property dated April 26, 2022 (F&R Project No. 59A-0128) based on planned future mixed use
(including residential) and the RECs identified in the Phase I ESA. F&R mobilized to the Subject Property
on April 1 and April 4, 2022, to perform field activities associated with the Limited Soil, Groundwater, and
Soil Gas assessment. The assessment consisted of advancing six soil borings into the subsurface behind
the building and in the northern storage yard. Boring locations B-6 through B-9 were advanced to the west
of the automotive maintenance building in the unpaved lot where damaged vehicles are stored. Boring
locations B-11 and B-12 were advanced in the northern storage yard. The soil sample locations are shown
on Figure 4: Existing Soil Sample Location Map.
Based on the assessment, F&R presented the following conclusions and recommendations:
• Total arsenic was detected at a concentration exceeding its NCDEQ Residential PSRG, of 0.67 in
the six locations sampled under this assessment. Arsenic ranged from 1.15 mg/Kg to 7.85 mg/Kg.
Published soil metals concentrations data for the project area suggest that the reported arsenic
concentrations are likely attributable to naturally occurring metal concentrations typical of the
surficial soils existing at the Property. Naturally occurring background metals are typically not
subject to regulatory action.
• Soil samples collected at the Subject Property and submitted for analysis indicated concentrations
of TPH DRO above the North Carolina Action level of 100 mg/kg in three of the sample collected.
Overall TPH DRO concentrations ranged from 17.8 to 3,490 mg/kg.
• It is F&R's understanding that a reporting requirement to the NCDEQ exists. F&R recommended
Greystar Development East, LLC A&A Truck & Auto (NCBP# 26063-22-060) Work Plan
Wilkinson Boulevard and Sam Wilson Road F&R Project No. 59A-0290
Charlotte, North Carolina July 28, 2023
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that the owner discuss reporting requirements with legal counsel.
• The groundwater samples collected from the Subject Property indicated that iron and manganese
exceeded NC2LGWQS in the samples collected.
• Based on the concentration distribution indicating that the highest concentrations were directly
downgradient of the adjacent DyStar facility where iron and manganese are contaminants of
concern, these elevated detections are attributed to dissolved contaminants associated with the
adjacent DyStar facility. It is F&R's understanding that a reporting requirement to the NCDEQ
exists and F&R recommended that the owner discuss reporting requirements with legal counsel.
• Soil gas samples collected at the Subject Property and submitted for analysis indicated
concentrations of naphthalene exceeded the North Carolina Residential Screening Level in two of
the four soil gas samples; however, F&R ran the detected soil gas concentrations through the
NCDEQ Risk Calculator. Based on the results from the NCDEQ Risk Calculator, Risk exceedances
were not identified for the residential, commercial, construction worker, or recreator/trespasser
pathways.
• The Subject Property is currently connected to municipal water services. Due to the lack of
interaction with the impacted groundwater (at a depth of approximately 23 to 30 feet bgs) and
anticipated continued use of municipal water services, groundwater mitigation measures are not
warranted at this time. Consultation with an environmental professional was recommended if
groundwater is encountered during future redevelopment of the Subject Property.
• F&R did not recommend additional groundwater assessment at that time.
• It is F&R's understanding that the Subject Property has been subsequently enrolled in the North
Carolina Department of environmental Quality (NCDEQ) Brownfields Program. The initial
assessment was not intended to characterize the site for inclusion in the Brownfields Program,
and additional assessment will be required to satisfy NCDEQ Brownfields requirements.
The Subject Property was submitted to the NCDEQ Brownfields Redevelopment Section. A Brownfields
Property Application for the Subject Property was submitted to the NCDEQto address the concerns noted
above on October 31, 2022. A conditional eligibility determination (LOE) was issued on December 16, 2022
(A&A Truck and Auto Brownfields Property, NCBP #26063-22-060). As noted in the attached cover letter,
this work plan for additional assessment is being submitted to proceed with the project while awaiting a
Brownfields Project Manager assignment to maintain the proposed project schedule.
The goal of this assessment is to further assess the impacts identified during the prior assessment, and to
assess potential vapor intrusion risks for the future proposed buildings for the NC Brownfields
Redevelopment Section.
PROPOSED SCOPE OF WORK
F&R on behalf of Greystar Development East, LLC, proposes to advance up to seven (7) soil borings. The
borings will be installed utilizing a direct push technology (GeoprobeT"'). Direct -push technology is a truck or
track -mounted tool that pushes sampling devices into the sub -surface using hydraulic pressure. This
method creates little disturbance, leaving only a 2-inch diameter. Boring logs with field observations will
be generated for the borings. Seven (7) soil samples will be submitted from the borings advanced at the
Greystar Development East, LLC
Wilkinson Boulevard and Sam Wilson Road
Charlotte, North Carolina
A&A Truck & Auto (NCBP# 26063-22-060) Work Plan
F&R Project No. 59A-0290
July 28, 2023
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Brownfields Property for further site characterization and to delineate identified impacts in F&R's April
2022 Limited Soil, Groundwater and Soil Gas Assessment, and to characterize surface soils in previously
identified storage areas. Four (4) additional samples will be collected along the former residence (vacant
office building) roof drip lines to assess for lead contamination associated with the roof drip lines of the
former residence that was subsequently converted to an office space. F&R will collect six (6) groundwater
samples from temporary groundwater points for further site characterization of soil and groundwater
impacts identified in F&R's April 2022 Limited Soil, Groundwater and Soil Gas Assessment in previously
identified storage areas and to further characterize impacts from the adjacent DyStar facility. Additionally,
F&R will collect eighteen (18) soil gas and four (4) sub -slab vapor samples, including one in each former
tenant space of the existing building and a minimum of two from each proposed apartment building
footprint (and one from the proposed clubhouse) to screen for VOCs in the subsurface. Some proposed
soil gas samples have been shifted to maximize coverage while controlling the number of samples where
the existing and proposed buildings overlap, or where two proposed buildings are in close proximity to
each other or existing soil gas data. The soil gas and sub -slab vapor samples will be installed and sampled
in accordance with the NCDEQ Division of Waste Management (DWM) Vapor Intrusion Guidance Document
(VIG) dated March 2018 for laboratory analysis via EPA Method TO-1S as detailed below in the Sampling
Methodology Section.
The sample depths, and analytical parameters are summarized on the attached Table 1: Proposed Sample
Locations and Analyses Summary Table.
SAMPLING METHODOLOGY
The Brownfields assessment activities will be conducted in general accordance with the DEQ Inactive
Hazardous Sites Branch (IHSB) Guidelines for Assessment and Cleanup, the DEQ Division of Waste
Management (DWM) Vapor Intrusion Guidance, and with Brownfields Minimum Requirements Checklist
for Site Assessment Work Plans and reports dated March 2023. NC 811 will be contacted for utility clearance
prior to commencing borings at the site.
Soil Sampling and Analysis
F&R proposes to advance up to seven soil borings to further characterize the site for the Brownfields
Program. The proposed locations are shown on the attached Figure 5: Proposed Soil Sample Location Plan,
and the sample depths and analytical parameters are included on Table 1: Proposed Sample Locations
and Analyses Summary Table. The borings will be advanced by direct -push to approximately twenty feet
below ground surface (bgs), the maximum proposed cut depth, (unless the groundwater interface is
encountered first). Soil obtained from the borings will be divided into two -foot intervals for field screening
and will be screened with a calibrated photo -ionization detector (PID). Each 2 foot interval will be placed
into a sealed Ziploc bag and allowed to equilibrate for approximately 5 minutes prior to screening the bag
with the PID. F&R will also record general qualitative information during the sampling process, including
soil conditions, depth to groundwater, and visual and olfactory observations and prepare field boring logs
with this information. One soil sample will be collected from each of the borings and will be submitted for
laboratory analysis. The soil samples will be collected from the interval exhibiting the highest PID reading
Greystar Development East, LLC A&A Truck & Auto (NCBP# 26063-22-060) Work Plan
Wilkinson Boulevard and Sam Wilson Road F&R Project No. 59A-0290
Charlotte, North Carolina July 28, 2023

or visual evidence of contamination. If no evidence of contamination or elevated PID readings are
detected, the soil samples will be collected from the zero to two foot bgs interval. Following completion
of sample collection, boring locations will be backfilled with cuttings. The soil samples will be placed into
laboratory provided jars, labeled, placed on ice to be submitted to an independent North Carolina certified
laboratory within 48 hours of collection under Chain -of -Custody procedures.
F&R has budgeted a total of seven soil samples to be submitted to an independent North Carolina certified
laboratory for analysis of RCRA 8 Metals plus iron and manganese, Hexavalent Chromium, Volatile Organic
Compounds (VOCs), and Semi -Volatile Organic Compounds (SVOCs). Additionally, F&R will collect up to
four soil samples along the roof drip lines of the former residence building that has been converted to
office space to be submitted for laboratory analysis of Lead. The laboratory reports will include Level II
QA/QC and T flags for the samples submitted. These parameters were selected based on contaminants
of concern, the nature of the RECs, and the parameters likely to be required by the NCDEQ Brownfields
Program. An additional composite sample may be collected for additional parameters to characterize soils
for future off -site disposal if required by the selected disposal facility. The number of samples and
parameters is based on F&R's opinion and prior work on other sites under the NCDEQ Brownfields
Program, as the client is proceeding due to their project timeline and non -availability of an NCDEQ project
manager within that time frame. While, a NCDEQ project manager has not been assigned, F&R has
prepared this work plan in general accordance with NCDEQ guidelines and revised the workplan based on
feedback from the NCDEQ Program Facilitator/Coordinator.
Groundwater Sampling and Analysis
F&R will collect a total of six (6) groundwater samples from borings advanced at the Subject Property. The
borings will be screened and logged as described in the Soil Sampling Section above. The proposed locations
are shown in blue on the attached Figure 9: Proposed Groundwater Sample Location Plan. The temporary
groundwater points will be installed with a direct -push rig and consist of 1-inch diameter PVC with 10 to
15 feet of slotted PVC screen that bridges the water table. A sand filter pack will be placed around the
screen to approximately two feet above the top of the PVC screen, followed by a minimum two -foot thick
hydrated bentonite seal above the filter pack. The wells will be purged at a maximum flow rate of 0.2
L/min and field parameters measured (pH, turbidity, dissolved oxygen, conductivity, and ORP) will be
recorded on a well purge log along with purge rate, volume, and visual observations. A minimum of three
well volumes will be purged, or until the well is dry. The top of the well casing will be sealed pending
sampling.
The temporary groundwater points will be positioned so that a groundwater flow determination can be
calculated. F&R will conduct a relative survey of the temporary groundwater points. F&R will collect
groundwater level measurements after groundwater levels stabilize (a minimum of 24-hours) to
determine groundwater flow direction. F&R proposes to utilize a peristaltic pump or disposable bailer to
collect the groundwater samples as dictated by field conditions. F&R will prepare temporary well
construction details and sampling logs of the temporary wells.
Greystar Development East, LLC
Wilkinson Boulevard and Sam Wilson Road
Charlotte, North Carolina
A&A Truck & Auto (NCBP# 26063-22-060) Work Plan
F&R Project No. 59A-0290
July 28, 2023
7

The collected groundwater samples will be collected directly into laboratory provided jars, labeled, placed
on ice, and submitted to an independent North Carolina certified laboratory for analysis of VOCs, SVOCs,
RCRA 8 Metals plus iron and manganese within 48 hours of collection under Chain -of -Custody procedures.
The laboratory reports will include Level II QA/QC and T flags for the samples submitted. The number of
samples and parameters is based on F&R's opinion and prior work on other sites under the NCDEQ
Brownfields Program and feedback from the NCDEQ Program Facilitator/Coordinator a NCDEQ project
manager has not been assigned, F&R has prepared this work plan in general accordance with NCDEQ
guidelines.
Soil Gas Sampling and Analysis
F&R proposes advancing four sub -slab vapor samples inside the existing warehouse now that the tenants
have vacated the building. F&R also proposes to install eighteen (18) soil gas sampling points based on
feedback from the NCDEQ, with a minimum of two from each proposed apartment building footprint (and
one from the proposed office). The proposed locations are shown on the attached Figure 12: Proposed
Sub -Slab and Soil Gas Sample Location Plan. The sub -slab borings will be advanced using a hammer drill a
5/8 inch carbide bit to install a sampling point to field screen for volatile organic compounds (VOCs) and
collect the sub -slab vapor using a mini-summa canister. The holes will be advanced approximately six
inches beyond the concrete slab and F&R will record the materials observed beneath the slab. The holes
will be sealed using a Vapor Pin and allowed to equilibrate for approximately twenty minutes prior to
being subjected to leak detection through the use of a helium shroud in general accordance with the DEQ
DWM Vapor Intrusion Guidance Document. The soil gas samples will be installed to approximately 10 feet
bgs via Geoprobe, a vapor implant probe installed, the annular space around and to six inches above the
probe filled with sand, and the points sealed with a hydrated bentonite plug. The soil gas points will be
purged of one volume, the tubing sealed, with an air tight cap, and subject to leak testing, and allowed to
stabilize for 24-hours prior to purging as described below prior to sampling.
The sub -slab vapor and soil gas samples will be collected as generally recommended in EPA Soil -Gas Sampling
Operating Procedure. The sub -slab points will be allowed to equilibrate for a minimum of 20 minutes, and
the soil gas points a minimum of 24 hours after installation and before sampling. The tubing will be purged
in conjunction with the helium leak test (discussed below) for a minimum of 5 minutes using an air pump at
0.2 L/min maximum (and three sample probe and tubing volumes) (whichever is greater) to ensure
background air is removed from the tubing in accordance with the DEQ DWM Vapor Intrusion Guidance and
EPA Soil -Gas Sampling Operating Procedure.
A helium leak test and a shut-in test will be performed to test the integrity of the seals and the soil gas
sampling apparatus. The helium leak test will consist of filling and sealing a shroud over the sample point,
tubing, and sampling train after the tubing has been placed and sealed. The shroud will be filled to a minimum
of 50% helium. A sample will be drawn into separate tedlar bags from the shroud and the sampling train
using the pump or a syringe, and a helium gas detector will be connected to the tedlar bag to check the helium
concentration. To be considered a good seal the helium concentration at the sample tubing must be less than
10% of the concentration in the shroud. The soil -gas samples will be collected using 1 to 1.6 L batch certified
mini-Summa Canisters with an approximate 0.1 to 0.2 L/min orifice (approximately 10 minutes sampling
Greystar Development East, LLC A&A Truck & Auto (NCBP# 26063-22-060) Work Plan
Wilkinson Boulevard and Sam Wilson Road F&R Project No. 59A-0290
Charlotte, North Carolina July 28, 2023
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time). These laboratory cleaned sample containers are stainless steel and calibrated to the individual
orifice with approximately 30 inches of mercury (30 "hg) vacuum prior to sample collection. The time and
vacuum are recorded, and monitored the approximate 10 minute sampling span. F&R will terminate the
sample collection at each sampling point while a minimum of 5 inches of mercury remains, and the
vacuum will not be allowed to reach zero.
Once completed the canisters will be transported to an accredited laboratory under chain -of -custody
procedures and analyzed for the full list of Volatile Organic Compounds by EPA Method TO-15. The
number of samples and parameters is based on F&R's opinion and prior work on other sites under the
NCDEQ Brownfields Program, as the client is proceeding due to their project timeline and non -availability
of an NCDEQ project manager within that time frame. While, a NCDEQ project manager has not been
assigned, F&R has prepared this work plan in general accordance with NCDEQ guidelines. The sub -slab
vapor sample results will be entered into the NCDEQ Risk Calculator for risk assessment.
Based on the current tenants' continued use of automotive chemicals, the sub -slab vapor samples will be
collected following when the tenants vacate the Subject Property. Depending upon the results of the Soil
Gas Assessment, a vapor mitigation plan, including pre and post testing, may be warranted as part of the
Brownfields Program requirements.
LABORATORY ANALYSIS
Seven soil samples will be submitted to an independent North Carolina certified laboratory for analysis of
RCRA 8 Metals plus iron and manganese, Hexavalent Chromium, SVOCs, and VOCs. One duplicate soil
sample will be collected for quality control. Four additional soil samples from around the former residence
will be submitted to an independent North Carolina certified laboratory for analysis of lead, TCLP lead (if
warranted based on lead results), iron, and manganese.
Six unfiltered groundwater samples plus a duplicate will be submitted to an independent North Carolina
certified laboratory for analysis of RCRA 8 Metals plus iron and manganese, SVOCs, VOCs, and Hexavalent
Chromium.
Four sub -slab vapor samples and 18 soil gas samples plus a duplicate sub -slab and duplicate soil gas
sample will be submitted to an independent NVLAP accredited laboratory for analysis of VOCs by EPA
Method TO-1S including naphthalene, but excluding acrolein.
F&R will request that estimated values above the laboratory method detection limit (MDL) but above the
laboratory reporting limit be reported by the laboratory with a T flag.
QA/QC PROCEDURES
As mentioned above, one duplicate sample will be collected for every 20 samples for each analysis and
media. This will result in one duplicate sample for each media being analyzed (soil, groundwater, sub -slab
vapor, and soil gas). Additionally, a single trip blank for each sample cooler (2 estimated) for analysis of
VOCs will be collected for the soil and groundwater sampling.
Greystar Development East, LLC
Wilkinson Boulevard and Sam Wilson Road
Charlotte, North Carolina
A&A Truck & Auto (NCBP# 26063-22-060) Work Plan
F&R Project No. 59A-0290
July 28, 2023
0

F&R will collect adequate sample volume as specified by the analytical laboratory for laboratory MS/MSD
analysis. All samples will be submitted to the laboratory within 48 hours of collection via F&R or laboratory
courier.
F&R will record the starting and ending vacuum pressure on the Chain -of -Custody for the soil gas and sub -
slab vapor samples.
INVESTIGATION DERIVED WASTE (IDW) MANAGEMENT
Additional soil cuttings that cannot be returned to the borehole can be spread on the evenly on the land
surface around the borings based on existing soil sampling data. If obvious indication of contamination is
identified during the soil borings the IDW will be drummed, characterized, and managed in accordance
with NCDEQ requirements.
If temporary monitoring wells are installed, soil cuttings generated during temporary monitoring well
installation will be spread on the evenly on the land surface around the area of the well based on existing
soil sampling data and managed in accordance with NCDEQ requirements. If obvious indication of
contamination is identified during installation of replacement monitoring wells, the cuttings will be
drummed and staged on site for disposal pending waste characterization.
Purge water from groundwater points will be filtered through carbon and discharged to the ground above
the monitoring wells, unless obvious contamination such as odors or elevated PID readings are
encountered, in which case it will be drummed and characterized for disposal in accordance with NCDEQ
requirements.
RECEPTOR SURVEY AND REPORT
In conjunction with this assessment, a receptor survey will be completed in accordance with the NCDEQ
Brownfield guidelines for receptor surveys.
Subsequent to the receipt of the laboratory analytical results, a report will be prepared presenting the
findings of our assessment. The report will include the following:
• Title Page and Report prepared in accordance with the NCDEQ Brownfields Redevelopment
Section Site Assessment Work Plan and Reports Checklist dated March 2023.
• Limited site map generation including boring locations.
• Data tables comparing the laboratory results to applicable standards and will utilize the most
recent version of the NCDEQ Risk Calculator.
• A summary of the assessment and findings.
• Boring logs with field observations for all borings.
• Temporary well construction and sampling logs.
• Groundwater flow and soil and groundwater concentration maps.
Greystar Development East, LLC
Wilkinson Boulevard and Sam Wilson Road
Charlotte, North Carolina
A&A Truck & Auto (NCBP# 26063-22-060) Work Plan
F&R Project No. 59A-0290
July 28, 2023
10

Laboratory analysis results with Chain of Custody documentation, including canister vacuum
pressure for soil gas and sub -slab vapor samples.
• Recommendations, if warranted.
The report will be reviewed and sealed by a North Carolina licensed Professional Geologist (PG).
SCHEDULING AND APPROVAL
F&R on behalf of Greystar Development East, LLC, is submitting this work plan for approval. As a Project
Manager has not yet been assigned, and to complete the assessment within the PDs schedule. F&R will
schedule the work within 20 days of submission of this plan to the Brownfields Program, unless a response
is received from the NCDEQ Brownfields Redevelopment Section requesting material changes to the scope
and methodologies proposed. F&R will begin coordinating utility clearance, and scheduling of the field
services. The field work schedule will depend upon availability of equipment and weather, but is
anticipated to commence within 3 to 4 weeks of submission of this work plan. F&R anticipates two (2)
days of field activities. Samples will be submitted to the laboratory within 24 hours of collection.
Laboratory results are expected within 7 days of receipt by the laboratory. The report summarizing the
assessment results and receptor survey can be submitted within 1 to 2 weeks of receipt of the sampling
results. The soil gas sampling will be completed separately once the tenants vacate the building.
ACKNOWLEDGMENTS AND ATTACHMENTS
We appreciate the opportunity to be of service to you on this project. If you have any questions regarding
this work plan, please do not hesitate to contact us.
Attachments: Work Plan Approval Signature Page and Work Plan and Report Checklist
Table 1: Proposed Analytical Table
Figure 1—Topographic Property Location Map
Figure 2- Subject Property Observation Map
Figure 3- Proposed Redevelopment Plan with Temporary Assigned Building Numbers
Figure 4- Existing Soil Sample Location Map
Figure 5- Proposed Soil Sample Location Map
Figure 6- Existing and Proposed Soil Sample Location Map
Figure 7- Proposed Roof Line Lead Sample Locations
Figure 8- Existing Groundwater Sample Location Map
Figure 9- Proposed Groundwater Sample Location Map
Figure 10- Existing and Proposed Groundwater Sample Location Map
Figure 11- Existing Soil Gas Sample Location Map
Figure 12- Proposed Sub -Slab and Soil Gas Sample Location Map
Figure 13- Existing and Proposed Vapor Sample Location Map
ALTA Plan with Proposed Preliminary Site Plan
Historical Analytical Summary Tables (from prior assessment)
Greystar Development East, LLC A&A Truck & Auto (NCBP# 26063-22-060) Work Plan
Wilkinson Boulevard and Sam Wilson Road F&R Project No. 59A-0290
Charlotte, North Carolina July 28, 2023
11

Distribution:
Michael Henry (Greystar Development East, LLC) michael.henry @greystar.com
Josh Glover (Greystar Development East, LLC) [e-mail]
Mary Katherine Stukes, Esq. (Moore & Van Allen) [e-mail]
Laura Boorman Truesdale ,Esq. (Moore & Van Allen) [e-mail]
Minnich, Carolyn (NCDEQ) [e-mail]
Greystar Development East, LLC
Wilkinson Boulevard and Sam Wilson Road
Charlotte, North Carolina
A&A Truck & Auto (NCBP# 26063-22-060) Work Plan
F&R Project No. 59A-0290
July 28, 2023
12

ATTACHMENTS
Work Plan Approval Signature Page and Work Plan and Report Checklist

ROY COOPER
Governor
ELIZABETH S. BISER
rk
Secretary
Gw ,�
MICHAEL SCOTT
NORTH CAROLINA
Director
Environmental Quality
ATTACHMENT 1
DEQ Brownfields Redevelopment Section
Assessment Work Plan Approval Signature Page
To be completed by Development Team and returned to DEQ Brownfields for review & signature.
Brownfields Project Name: A&A Truck & Auto
Brownfields Project Number: 26063-22-060
Work Plan Title: Brownfields Assessment Workplan: A&A Truck & Auto (A.K.A. Birchway West CLT
Date: Click or tap here to enter text.
Revision Number: 2
Be advised that this approval from DEQ Brownfields does not waive any applicable requirement to
obtain any necessary permits, licenses, or certifications for the above listed activities nor does it waive
any requirement to comply with applicable law for such activities.
Prospective Developer (PD): Greystar Development East, LLC
Contact Person: Josh Glover
Phone Numbers: Office: [phone]
Email: [e-mail]
Property Owner (if different from above): N/A
Contact Person: Click or tap here to enter text.
Phone Numbers: Office: Click or tap here to enter text.
Email: Click or tap here to enter text.
Environmental Consultant: Froehling & Robertson, Inc.
Contact Person: Brian T. Olin, PG
Phone Numbers: Office: 704-409-7243
Email: [e-mail]
Signature:
C!a
Consultant: Froehling & Robertson, Inc.
Printed Name/Title/Company: Brian Olin, GeoEnvironmental
Practice Leader
Brownfields Project Manager: Click or tap here to enter text.
Phone Numbers: Office: Click or tap here to enter text.
Email: Click or tap here to enter text.
Signature: A
Mobile: Click or tap here to enter text.
Mobile: Click or tap here to enter text.
Mobile: [phone]
Date 7/28/2023
PG/PE F A r . uFu F.
Mobile: Click or tap here to enter text.
uERM,
Brownfields Proj)ct Managen'dW or tap here to enter text. Date Click or tap to enter a date.
4�4 ��� North Carolina Department of Environmental Quality I Division of Waste Management
217 West Jones Street 1 1646 Mail Service Center I Raleigh, North Carolina 27699-1646
Ddp .ntofEI*M .^wa•kz'.919.707.8200

Work Plan and Report Checklist
Version 3 March 2023
Minimum Requirements Checklist
Site Assessment Work Plans and Reports
NCDEQ Brownfields Redevelopment Section— March 2023
Instructional Page
All references to Prospective Developers include follow-on owners who may be conducting
work in accordance with the Brownfields Property Management Branch.
To increase predictability and most efficiently assess Brownfields Properties and the redevelopment
timing requirements of Prospective Developers or follow-on owners, the Brownfields
Redevelopment Section has standardized the format for Site Assessments. This format has been
generated in the form of a checklist to allow for ease in submission by the prospective developer's
consultant and for the Brownfields Redevelopment Section's completeness review. This checklist
outlines the minimum requirements and submittal format under the Brownfields Redevelopment
Section for Assessment Requirements and Reporting. All Assessment Work Plans and Report
submissions to the Brownfields Redevelopment Section must include this completed checklist in the
outlined format.
These requirements allow DEQ to reduce review time for the Assessment Work Plan and Report
and increase process predictability for prospective developers. This checklist will also provide
reliable data for risk -based decisions and further expedite the project timeline. Any divergence from
these requirements will lengthen the process of assessing risks on the site, may necessitate
reprioritization of a project manager's queue towards projects that meet these requirements.
Therefore, delaying production of the brownfields agreement and/or environmental management
plan. Any alterations to the checklist on a site -specific basis must be reviewed and approved by the
Section prior to implementation. However, in order to respect the schedule of all projects in house
and keep the Section's entire project pipeline moving, we strongly recommend against seeking
changes to the checklist.
Based on a review of environmental and risk data from our project inventory, please note
there are some new points of emphasis that are included herein:
1. For ALL residential reuses; sub -slab vapor assessment (full list EPA TO-15) is required,
regardless if existing structures will be removed. If no structures or slabs exist on the
Brownfields Property, exterior soil gas assessment is required within all proposed structure
footprints.
2. ALL properties require groundwater data (VOCs, SVOCs and RCRA Metals) from a
minimum of three sample locations, depth to groundwater and a resulting potentiometric
map.
3. Soil shall be assessed based on areas of concern and redevelopment plans and across the
depth interval of the cut/grading.

Work Plan and Report Checklist
Version 3 March 2023
Environmental Site Assessment
Work Plan Checklist
Reviewed and checked by (Name):
Title Page
Brian T. Olin, PG
The title page should include the following information. Letter style reports are acceptable, as long as this
information is somewhere on the first page.
® Title of Work Plan
® Brownfields Project Name (not the development name)
® Brownfields Project Number
® Date (updated with each revision)
® Revision Number
® Firm PE/PG License Number
® Individual PE/PG seal & signature
Section 1— Introduction
® Provide the site location, address, and acreage.
® Provide a BRIEF summary of the history of the property and its history in the Section. For example:
reiterate RECs from a Phase I ESA, indicate if the scope of work was negotiated during a Data Gap
Meeting, etc.
® Briefly list and describe the data gaps the assessment is attempting to fill
® Indicate if the assessment data is for the use of any other DEQ programs in addition to the Brownfields
Redevelopment Section (i.e. the site is a regulated UST, IHSB, etc. property)
Section 2 — Scope of Work
® Provide a general description of proposed scope of work covered in this plan (i.e. 2 new monitoring
wells, 6 groundwater samples, 5 exterior soil gas sampling points and 6 soil borings)
® Discuss samples to be collected by media and source area/location. Generally, the reasoning for the
sample locations selected.
® Describe depths of samples to be collected (Reference Table 1) or how that decision will be made in
the field, if needed.
® State for what each sample will be analyzed (briefly). Reference Table 1.
Note: For all residential reuses, sub slab vapor is required, if no slabs exist, exterior soil gas is required
within all proposed footprints.
Section 3 — Sampling Methodology
® Reference the guidance documents you intend to use. IHSB, EPA SESD, VI Guidance, Well
Construction Rules (NCAC 2C). Note deviations or methodology planned that is not covered by
such guidance (e.g., multi -increment sampling, passive air samplers, mobile labs, Hapsite,
simultaneous indoor/outdoor radon, high -volume sub -slab vapor testing, PFAS sampling).
® Describe what will be installed (soil boring, temporary well, permanent well, sub -slab vapor, exterior soil
gas, etc.). Include construction details.
N Discuss installation methodology (Hand Auger, DPT, etc.)
Discuss Equilibration Times

Work Plan and Report Checklist
Version 3 March 2023
Monitoring wells (equilibration time prior to development and equilibration post well
development should be 24 hours, per EPA standard protocols).
Vapor:
a. Sub slab vapor with minimally invasive points (e.g. Vapor Pins): Manufacturer's
guidelines generally suggest 20 minutes may be sufficient with an airtight cap installed; or
b. Sub slab vapor points (other than minimally invasive points) or exterior soil gas points:
at least 24 hours (to be purged at installation and at time of sampling with an air -tight cap
in place in the interim).
® Discuss sample collection procedures. Include the following, at a minimum:
• Equipment to be used
• Purging methods and volumes
• Stabilization parameters for groundwater sampling
• Field screening methods
• Leak check procedures for sub -slab vapor and exterior soil gas samples (Note this is
required)
• Discuss how and when vacuum readings will be collected (for summa cans)
• Submission of the samples to the laboratory within 48 hours of collection and/or written
documentation of temperature maintenance if the situation requires extension beyond 48
hours prior to lab submittal
M Discuss sample point abandonment
Section 4 — Laboratory Analyses
M Discuss the proposed analyses (include method number, preparation method, if there are concerns
with short hold times, etc).
M Discuss any proposed limitations on the contaminants of concern, if any, and the reason for such
limitation (sufficient previous data, indoor air interferences, etc).
M Discuss laboratory certifications. Please note, NC does not certify labs for air samples. Please specify
what certification the proposed air lab holds.
M Indicate that the Reporting Limits/Method Detection Limits will meet applicable screening criteria
(to the extent feasible). Include reporting of J-Flags to meet criteria.
M Indicate what Level QA/QC will be reported by the laboratory. Level 11 QA/QC is typically
acceptable.
Section 5 — QA/QC
M Specify the duplicate sample frequency. Minimum requirement: 1 duplicate per 20 samples, per
media, per method.
M Discuss Trip Blank. 1 Trip Blank per cooler/shipment of groundwater VOC analyses is required.
M Discuss how the lab will have sufficient sample volume for MS/MSD analyses.
M Discuss chain of custody and shipping.
Section 6 — Investigation Derived Waste (IDW) Management
M Discuss what IDW will be generated and how it is proposed to be managed. Management
recommendations should be in accordance with 15A NCAC 02T.1503 and 15A NCAC 02H. 0106.
Generally, if the Brownfelds Property has not previously been assessed, then all IDW must be
containerized and characterized prior to management. Previous assessment data that indicate no
Hazardous Waste (listed or characteristic) is likely to be encountered in the area of proposed

Work Plan and Report Checklist
Version 3 March 2023
assessment will be required before thin spreading of IDW on -site is permitted.
Section 7 — Reporting
This section should discuss the components of the assessment report which will be prepared as a result of
the above sample collection. At a minimum, the report shall include:
® Title Page that is consistent with the requirements listed above.
® Reporting/summary of site work conducted for all sections outlined above in this checklist;
❑ Summary of findings and possible recommendations;
® All applicable tables and figures (shall include at a minimum the items below)
❑ Tables for tabulated analytical data per media sampled and analyzed, compared against
applicable screening levels, sample depths and depth to groundwater;
❑ Figure depicting actual sample locations collected, with each media depicted in the legend,
graphic scale and north arrow; and
❑ Groundwater potentiometric map, with graphic scale and north arrow.
❑ Appendices shall include (as applicable):
❑ Copies of field notes
❑ Boring logs for all soil borings, newly constructed monitoring wells, and exterior soil gas
locations
❑ Well construction and abandonment records
Work Plan Approval Signature Page (see Attachment 1). The Consultant shall complete and
submit the Approval Signature Page with the work plan submittal for DEQ signature.

Work Plan and Report Checklist
Version 3 March 2023
Attachments
® Attachment 1 — Work Plan Approval Signature Page
® Table 1 —Proposed Sample Locations and Analyses on a Summary Table that includes:
®
Sample ID
®
Sample Objective
®
Proposed Depth(s)
®
Analytical Method(s)
®
QA/QC Samples
®
Background Samples
® Figure 1 — Site Location Map
® Site location on a topographic map base
❑ Graphic scale and north arrow
® Figure 2 — Site Map should include the following
® Buildings
® Historical sample locations
® RECs or other areas of concern
® Proposed sample locations
® Sample identification labels
® Background samples
® QA/QC samples
® Graphic scale and north arrow
® High quality aerial suggested as the base map
❑ Figure 3 — Site Potentiometric Map that includes the following
❑ Buildings
❑ Groundwater sample identification labels
❑ Arrow noting direction of groundwater flow
❑ Graphic scale and north arrow
® Figure 4 — Site Plume Maps (groundwater, soil vapor, etc.)
® Figure 5 — Proposed Development (if available)
® Overlay of historical and proposed sample locations
® Graphic scale and north arrow
9 Appendix — Summary of Historical Analytical Data (if needed) — to include tables and figures only.

ATTACHMENTS
Table 1

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Client: Gre star Development East
F Froehling & Robertson, Inc. Project: Birchway west Brownfields
3015 Dumbarton Road Location: Charlotte, North Carolina
Richmond, Virginia 23228 Project Number: 59A-0290FIGURE
Data Source: Goo le Earth 13
T 804.264.2701 Date: June 2023 A roximate Scale: As Shown NO.:

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