24007_Wrights Exective Sales_II_Assessment WP_20201007

BROWNFIELDS ENVIRONMENTAL ASSESSMENT WORK PLAN
REVISION NUMBER: 1.0
WRIGHT'S EXECUTIVE SALES
721 AND 723 RIGSBEE AVENUE; 620 AND 616 FOSTER STREET
DURHAM, DURHAM COUNTY, NORTH CAROLINA
BROWNFIELDS PROJECT ID. 24007-20-032
ECS PROJECT NO. 49:10039-A
PREPARED FOR
GEERHOUSE PARTNERS, LLC
OCTOBER 7, 2020
Work Plan Certification
I, Scott M. Werley, P.G., a Licensed Geologist for ECS Southeast, LLP (NC Registered
Geologist Firm C-553), do certify that the information contained herein is correct and
accurate to the best of my knowledge.
34
Scott M. Werley,
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ECS SOUTHEAST, LLP "Setting the Standard for Service"
Geotechnical • Construction Materials • Environmental • Facilities INC Registered Engineering Firm F-1078 INC Registered Geologists Firm C-553-553
SC Registered Engineering Firm 3239
Ms. Holly Samaha October 7, 2020
North Carolina Department of Environmental Quality
Division of Waste Management
Brownfields Program
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Reference: Brownfields Environmental Assessment Work Plan Rev 1.0
Wright's Executive Sales
721 and 723 Rigsbee Avenue; 620 and 616 Foster Street
Durham, Durham County, North Carolina
Brownfields Project No. 24007-20-032
ECS Project No. 49-10039-A
Dear Ms. Samaha:
ECS Southeast, LLP (ECS) has prepared this work plan to collect soil, groundwater, and soil
gas samples at the above referenced site. This plan has been developed at the request of
the North Carolina Department of Environmental Quality (NCDEQ) Division of Waste
Management (DWM) Brownfields Program (the Program) following the site's "kickoff'
meeting which occurred on August 5, 2020 and based upon additional requests forwarded
by the Program in email correspondence dated September 25, 2020
ECS appreciates the opportunity to work with your Program. If you have any questions
concerning this work plan or this project, please contact us.
Sincerely,
ECS SOUTHEAST, LLP
Scott M. Werley;VP.G.
Principal Geologist
919-861-9846
swerleyCaecslimited.com
Jacob R. LaFave
Environmental Technician
336-335-9861
ilafave(c�ecslimited.com
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Col . Jones
Environmental Staff Project Manager
919-441-2988
ciones66j�ecslimited.com
ECS Capitol Services, PLLC • ECS Florida, LLC • ECS Mid -Atlantic, LLC • ECS Midwest, LLC • ECS Southeast, LLP • ECS Southwest, LLP
www.ecslimited.com

Wright's Executive Sales - Brownfields Environmental Assessment Work Plan Rev 1.0
Brownfields Project #24007-20-032
TABLE OF CONTENTS
1.0 INTRODUCTION.....................................................................................................................1
2.0 SCOPE OF WORK.................................................................................................................3
3.0 SAMPLING METHODOLOGY..............................................................................................5
4.0 LABORATORY ANALYSIS...................................................................................................9
5.0 QA/QC......................................................................................................................................9
6.0 INVESTIGATION DERIVED WASTE MANAGEMENT...................................................10
7.0 REPORTING.........................................................................................................................10
FIGURES
Figure 1 Site Topographic Location Map
Figure 2 Site Features Map
Figure 3 Historic Sample Location Map
Figure 4 Proposed Sample Location Map
Figure 5 Proposed In -Situ Boring Location Map
Figure 6 Proposed Sample Location Map with Proposed Development Overlay
TABLE
Table 1 Wright's Executive Sales Proposed Sample and Analytical Descriptions
APPENDICES
Appendix A Cut and Fill Illustrations

Wright's Executive Sales - Brownfields Environmental Assessment Work Plan Rev 1.0
Brownfields Project #24007-20-032
1.0 INTRODUCTION
The Wright's Executive Sales Brownfields Property redevelopment site (the Subject Site) consists
of five parcels and a total of 2.335 acres of land (see Figures 1 and 2). It is in a commercial area
of Durham just to the south of W. Geer St. and west of Foster St. The Subject Site is occupied by
three buildings associated with Acme Plumbing and Heating offices and storage, a stand-alone
yoga studio, Motorco Music Hall, and The Mothership, which is a creative space to share, make,
and collaborate on artistic projects. The Subject Site is identified by the Durham County Online
GIS Database with the following Parcel Identification Numbers (PINs) and street addresses:
Street Addresses
PINs
Parcel Size
(Acres)
616 Foster St.
0821-08-99-
0.273
2971
620 Foster St.
0822-08-90-
0.887
2088
721 Rigsbee Ave.
0822-08-90-
0.543
4036
723 Rigsbee Ave.
0822-20-90-
0.572
4169
Unnamed Alley (0 Rigsbee Ave)
0822-20-41-
0.06
6111
Ownership by the Prospective Developer (PD) of the western half of the site, historically the
Wright's Executive Auto Sale portion was acquired on December 31, 2019 and includes the above
listed parcels identified with PINs 0822-08-90-4036 (721 Rigsbee) and 0822-20-90-4169 (723
Rigsbee). The deed for the unnamed alley, identified with PIN 0822-20-41-6111 and also owned
by Geerhouse Partners, was recorded on March 27, 2020.
The northeastern portion of the site (PIN 0822-20-90-4169), historically the Uzzle Motor Co. is
now a music hall and bar and is currently planned to remain open. A Brownfields Property
Application (Standard Track) was submitted by Mr. John Sunter of Four Points Development, LLC
dated January 30, 2020 for the eastern and western parcels identified above. Subsequently, on
June 10, 2020 the North Carolina Department of Environmental Quality (NCDEQ) Division of
Waste Management (DWM) Brownfields Program (the Program) Standard Track Letter of
Eligibility (LOE) correspondence was issued and indicated that the parcels were deemed eligible
for continued evaluation for a Brownfields Agreement (BFA) with the exception of 620 Foster St
(PIN 0822-08-90-2088). 620 Foster St. was subsequently deemed eligible following the August
13, 2020 submittal of an Affidavit by the PD indicating that, Acme Properties of Durham, LLC
(Acme), would not be a controlling member of the PD.
This work plan seeks to address potential environmental data gaps in order to provide a level of
additional environmental assessment that will be required to support the drafting of a Brownfields
Agreement for the entire Brownfields Property including all five parcels referenced above.
1.1 Site History
As indicated in the Brownfields Property Application dated January 30, 2020, the following
previous environmental reports are associated with the Brownfields Property:

Wright's Executive Sales - Brownfields Environmental Assessment Work Plan Rev 1.0
Brownfields Project #24007-20-032
• Tank Removal Information, Boswell Plumbing Co., December 19, 1989
• Limited Phase II ESA — Wright's Executive Auto Sales, ECS Carolinas, LLP, January 12,
2007
• Phase I ESA Report — 620 Foster Street, Piedmont Geologic, P.C., November 8, 2008
• Phase I ESA, prepared by ECS Southeast, LLP (ECS), December 6, 2019
The Phase I Environmental Site Assessment (Phase I ESA) prepared by ECS and dated
December 6, 2019 was completed for 620 and 616 Foster Street, 721 and 723 Rigsbee Avenue,
in Durham, Durham County, North Carolina. It reported and summarized the following RECs and
historical environmental associated with the Brownfields Property:
• Carolina Body Shop, 401 West Geer Street - located on the northeastern portion of the
property, currently identified as 723 Rigsbee, was listed as an automotive repair facility in
1979. The previous Limited Phase II ESA (ECS Project No. 06-14636-A dated January,
2007) was conducted at this property.
Numerous soil borings and two monitoring wells were advanced during that assessment
completed in 2007 in the approximate locations illustrated on Figure 3. Laboratory soil
analysis indicated total petroleum hydrocarbons (TPH) gasoline range organics (GRO),
TPH diesel range organics (DRO), and oil and grease at concentrations greater than their
respective NCDEQ Action Levels. Additionally chromium was reported with
concentrations above its Preliminary Soil Remediation Goals (PSRG) and the
Massachusetts Department of Environmental Protection (MADEP) C9-C22 aromatic
petroleum hydrocarbon fraction range was reported above its Soil to Groundwater
Maximum Soil Contaminant Concentrations (MSCCs) when analyzed for Extractable
Petroleum Hydrocarbons (EPH).
Groundwater quality samples were also obtained from two monitoring wells (MW-1 and
MW-2) installed on the property during that assessment. The analytical results indicated
exceedances of the North Carolina 2L Groundwater Quality Standards (NC2LGWQS) for
benzene in MW-1 and MW-2, and for naphthalene in MW-1.
Murphy Elwood Automotive, 719 Rigsbee Avenue - located on the southern adjacent
and cross to upgradient property. According to the EDR report, this facility was identified
at this location in 1983 and 1990. According to historical aerials, the property appeared to
be used for automotive repair activities since its construction in the mid-1960s. Based on
the proximity to the subject property, the use of the facility as an automotive repair facility,
and the potential for an undocumented release to negatively impact the subject property,
ECS considered this facility to be a REC for the subject property.
The historical Phase I ESA — 620 Foster Street conducted in 2008 by Piedmont
Geologic, P.C. - was also summarized in the 2019 Phase I ESA prepared by ECS. It
indicated additional potential historic sources of impacts/RECs associated with Parcel
0822-08-90-2088 including:
An unused AST for storage of diesel fuel and a 55-gallon drum of cutting oil located along
the eastern boundary of the site property not located within secondary containment, an
unused hydraulic lift located in the storage building, and floor drains located in the wash
bay of the storage building. The floor drains were believed to lead to a sand trap; however,
this was not confirmed as the drain covers were bolted to the ground.
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Additionally, a gasoline UST was reported to have formerly been located on the northern
portion of the site property and removed in 1989. Soil samples were collected from the
UST excavation by Max Boswell Plumbing Co., Inc. during the 1989 removal; however,
the results of laboratory analysis of the soil samples were not available.
➢ This area was assessed on August 27, 2019 via the soil sampling at the approximate
location illustrated on Figure 3 and identified as B-1. Field screening of geotechnical
split -spoon samples was performed using a Mini -Rae 2000 PID. The field screening
did not indicate measurable concentrations of volatile organic vapors although the
ECS environmental professional noted a faint diesel -like odor from approximately 13.5
to 15.0 feet below ground surface (bgs). The ECS environmental professional selected
this interval for additional laboratory analysis by EPA Method 8260 for volatile organic
compounds (VOCs) and by EPA Method 8270 for semi -volatile organic compounds
(SVOCs). Targeted analytes were not reported above laboratory reporting limits.
Groundwater was reported to be at approximately 27 feet bgs in the boring (B-1).
The following scope of work has been developed in an effort to satisfy additional assessment
activity to be performed as decided in part during the Brownfields "kickoff' meeting that occurred
on August 5, 2020. The data obtained from executing this work plan is intended for regulatory use
by the Brownfields Program only.
2.0 SCOPE OF WORK
The objective of this work plan is to provide for the collection of soil, groundwater, and soil gas
quality data at the site in an effort to support the drafting of a future Brownfields Agreement. The
Brownfields "kickoff" meeting that occurred on August 5, 2020 presented existing environmental
assessment data associated with the Brownfields Property from the following previously prepared
environmental reports:
• Tank Removal Findings (by Boswell Plumbing Co. dated 12/19/1989)
• Limited Phase II ESA (by ECS dated 1/12/2007)
• Phase I ESA (by Piedmont Geologic dated 11/8/2008)
• Phase I ESA (by ECS dated 12/6/2019)
Based upon ECS's and the Program's review of the above listed environmental reports, data gaps
were identified which have been requested to be assessed. Historical soil and groundwater
sample locations are illustrated on the included Figure 3. Proposed sample locations are
illustrated on aerial photography provided in Figure 4, and on proposed redevelopment plans in
Figure 5. In order to meet the requests of the Program and to fill in data gaps left by the previous
environmental assessments the following described scope of work is to be conducted under this
work plan and in accordance with the November 2018 Brownfields Program Work Plan Checklist.
2.1 Pre -Assessment Tasks
Prior to assessment activities, ECS will contact North Carolina One Call (NC811) to identify public
underground utilities at the site. This notification requires 72 hour response time exclusive
of weekends and holidays. Our experience indicates that 811 normally does not locate private
utilities. As such, ECS will provide a private utility locator to locate subsurface utilities in proposed
soil boring, temporary monitoring well, and soil gas sample locations both interior and exterior to
subject site buildings to clear utilities at the proposed boring locations.

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2.2 Soil Assessment
ECS will contract with a North Carolina Certified Well Contractor (NCCWC) to perform four soil
borings advanced for the collection of soil quality samples. Six additional soil samples will be
collected from borings advanced during the installation of temporary monitoring wells. Figure 4
has been included as a Proposed Sample Location Map and illustrates the approximate locations
of the proposed soil borings identified as SS-1 through SS-10. Borings will be completed with a
track -mounted, direct -push technology (DPT), drill rig provided by the North Carolina Certified
Well Contractor. The exact locations of the soil borings will be determined in the field to miss
buried utilities, and will be based upon filling in data gaps associated with the review of the site's
historical environmental assessment information. Proposed soil sample depths and additional
descriptions are included in Table 1.
2.3 In -Situ Soil Assessment
ECS will contract with a NCCWC to perform eight (8) soil borings advanced for the collection of
soil quality samples. Figure 5 has been included as a Proposed In -Situ Sample Boring Location
Map and illustrates the approximate locations of the proposed soil borings identified as B-1
through B-8. Borings will be completed with a DPT drill rig provided by the NCCWC. The borings
will range from 5 to 11 feet in depth below the ground surface and are dependent upon the existing
grade and cut plans associated with the site's redevelopment. Cut and fill illustrations have be
included in Appendix A.
The exact locations of the soil borings will be determined in the field to avoid buried utilities,
although will be placed in the approximate locations illustrated on Figure 5 and advanced to the
approximate depths as summarized in Table 1 and noted on Figure 5. Soil borings will be
abandoned by a NCCWC upon completion of the sampling event. Descriptions and depths of
proposed in -situ soil samples can be found in Table 1.
2.4 Groundwater Assessment
ECS will contract with a NCCWC to perform seven temporary well installations for groundwater
sample collection with a track mounted DPT drill rig. Proposed temporary wells are to be identified
as GW-1 through GW-7, and their approximate proposed locations are illustrated on Figure 4.
The exact locations of the temporary wells will be determined in the field to miss buried utilities,
and will be based upon filling in data gaps associated with the review of the site's historical
environmental assessment information.
Four of the temporary wells, identified as GW-1, GW-2, GW-3, and GW-7 are proposed to be
drilled to 35 feet below ground surface (bgs) and three of the temporary wells, identified as GW-
4, GW-5, and GW-6, are proposed to be drilled to 25 feet below bgs (approximately 10 feet into
the shallow groundwater table) based upon prior assessment data available for the site. The
temporary wells will be constructed per North Carolina Administrative Code (NCAC) 2C well
construction standards utilizing 1-inch diameter PVC well screen and riser pipe with its screen
straddling the water table. Descriptions of proposed groundwater samples are included in Table
1.
2.5 Soil Gas Assessment
Twelve soil gas samples will be collected. Five will be exterior soil gas samples, identified as SG-
1 through SG-5, and seven will be an interior sub -slab soil gas samples, identified as SG-6
through SG-12. The approximate locations of the proposed interior and exterior soil gas samples
are illustrated on Figure 4. The exact locations of the installed soil gas vapor points will be
determined in the field to miss buried utilities, and will be based upon filling in data gaps
associated with the review of the site's historical environmental assessment information. SG-1
through SG-5 will be collected at an estimated depth of 5-feet bgs, approximately 5-feet above
the groundwater surface. SG-6 through SG-12 will be sub -slab samples collected just beneath
the existing concrete slabs at an approximate depth of 1-feet. SG-10 through SG-12 will be
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Wright's Executive Sales - Brownfields Environmental Assessment Work Plan Rev 1.0
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collected from within the Acme Garage, with SG-10 between bays 1 and 2, SG-11 between bays
2 and 3, and SG-12 between bays 3 and 4. Proposed interior and exterior soil gas sample depths
with additional descriptions are included in Table 1.
2.6 Additional Tasks
The wells' top of casing elevations will be surveyed by a NC Licensed Surveyor upon completion
in order to provide the data needed for accurately determining groundwater flow and geospatial
location. Following surveying, depth to groundwater measurement and groundwater sample
collection, the borings will be abandoned by a NCCWC. Both well construction forms and well
abandonment forms will be provided. Borings logs for the proposed soil and groundwater sample
locations will be completed and included in the report prepared as a result of this work plan.
2.7 Reporting
A report of the results of the sampling outlined in this work plan will be submitted to the Program.
If unidentified and unexpected conditions are encountered during the assessment, we will
consult with the Program. Holly Samaha, the Brownfields Project Manager, will be notified at
least 5 days prior to starting the field work.
Holly Samaha
Project Manager — NCDEQ Brownfields Program
919.210.3696
holly.samaha(@ncdenr.gov
3.0 SAMPLING METHODOLOGY
3.1 Soil Sample Collection
Soil sampling will be conducted in general accordance with the NCDEQ, Inactive Hazardous Sites
Program Guidelines for Assessment and Cleanup (January 2020). Four borings will be advanced for
the collection of soil samples and six additional soil samples will be collected from the borings
advanced during the installation of temporary monitoring wells. Figure 4 has been included as a
Proposed Sample Location Map. Boring locations will be completed with the use of a DPT drill rig
provided by the North Carolina Certified Well Contractor. Soil samples will be collected from the
disposable PVC liners produced by the DPT drill rig. ECS will visually classify the soil collected from
each boring and screen the soil samples for relative levels of volatile organic vapors using a using a
photoionization detector (PID) or similar device. If elevated PID readings or visual/olfactory
observations indicate evidence of soil impacts, ECS will denote on the soil boring log.
In accordance with the attached Table 1, the samples are to be analyzed by EPA Method 8260 for
volatile organic compounds (VOCs), by EPA Method 8270 for semi -volatile organic compounds
(SVOCs), by EPA Method 6020/7471 for RCRA 8-Metals, and by EPA Method 7199 for low-level
hexavalent chromium (Cr VI). Soil samples will be collected at every 5-foot interval from ground
surface to the termination depth of the soil borings (see Table 1 for termination depths). If volatile
organic vapors are detected, the soil sample interval exhibiting the highest field screened
concentrations from above the water table will be submitted for laboratory analysis. If no volatile
organic vapors are detected then a sample will be collected from the upper 5-feet of the boring for
laboratory analysis.
One duplicate (non -background) soil sample is to be collected during the soil assessment for
Quality Assurance/Quality Control (QA/QC) purposes. The duplicate, identified as DUP-1, will be
submitted for the same soil analyses as listed above (See Table 1).
Following soil sample collection, the borings will be abandoned by a NCCWC. Borings logs for
the proposed soil sample locations will be completed and included in the report prepared as a
result of this work plan.
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3.2 In -Situ Soil Sample Collection
Soil sampling will be conducted in general accordance with the NCDEQ, Inactive Hazardous Sites
Program Guidelines for Assessment and Cleanup (January 2020). The DPT drill rig will advance
borings from ground surface to termination depths ranging from 5 feet bgs to a maximum of 11
feet bgs. Representative soil samples will be collected at varying depths throughout the proposed
areas under the supervision of our field geologist. Depths sampled will be in five-foot increments
and with maximum boring termination depths varying due to existing grade and redevelopment
plans. ECS will remove the soil cores from the disposable PVC liners produced by the DPT drill
rig, visually classify the soil collected from each boring, and screen the soil samples for relative
levels of volatile organic vapors using a photoionization detector (PID) or similar device. If
elevated volatile organic vapor concentrations or visual/olfactory observations indicate evidence
of soil impacts, ECS will denote on the soil boring log. Borings will be abandoned by the NCCWC
upon completion in accordance with NCAC 2C standards.
Eight soil borings, identified as B-1 through B-8, will be advanced by the DPT drill rig in order to
obtain in -situ data for the horizontal characterization of the on -site soils. The in -situ samples,
identified as IS-1-1, IS-2-1, IS-2-2, and IS-3-1, will be collected in a celled approach and at
incremental depths in order to provide horizontal characterization of the soil. Depths sampled will
be in five-foot increments and with maximum boring termination depths varying due to existing
grade and redevelopment cut plans. The overall required number of samples to be analyzed by
the laboratory will be minimized by utilizing this horizontal composite sampling method.
The samples are to be analyzed by EPA Method 8260 for VOCs, EPA Method 8270 for SVOCs,
EPA Method 6020/7471 for RCRA 8-Metals, and for Cr VI by EPA Method 7199. For VOCs, a
grab sample will be collected from the boring within each celled area which contains the highest
relative levels of volatile organic vapors within that five-foot vertical increment. VOC samples will
be taken directly from the core; soil that has been screened with the PID will be ineligible for
sampling.
Following the collection of representative VOC samples, SVOCs, RCRA 8-Metals, and Cr VI
samples will be composited by gently mixing the three (Cell 1 and Cell 2) or two (Cell 3)
representative samples collected from each celled area's similar approximate 5-foot depth
horizons which will result in a celled representative horizontal composite sample. Samples will be
collected into laboratory supplied/preserved containers. Following collection they will be
emplaced within an ice chilled cooler for courier transportation to the laboratory.
One duplicate (non -background) in -situ soil sample is to be collected during the soil assessment
for Quality Assurance/Quality Control (QA/QC) purposes. The duplicate, identified as DUP-2, will
be submitted for the same soil analyses as listed above (See Table 1).
Following soil sample collection, the borings will be abandoned by a NCCWC. Borings logs for
the proposed soil sample locations will be completed and included in the report prepared as a
result of this work plan.
3.3 Groundwater Sample Collection
Groundwater sampling will be conducted in general accordance with the NCDEQ, Inactive
Hazardous Sites Program Guidelines for Assessment and Cleanup (January 2020). The
temporary monitoring wells will be developed immediately after installation. Following a minimum
of 24 hours after the monitoring well installation activities are complete; the wells will be monitored
and sampled. The groundwater samples will be collected with the use of a peristaltic pump and
new clean disposable polyethylene tubing at each well location. Groundwater quality
measurements including pH, temperature, conductivity, and turbidity will be performed with the
use of a flow through cell and water quality meter.
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Seven temporary well groundwater samples, identified as GW-1 through GW-7, will be collected
into laboratory supplied/preserved sample containers once water quality measurements are
stabilized as measured with the flow through cell and water quality meter. The groundwater
samples will be submitted for analysis for VOCs by EPA Method 8260, SVOCs by EPA Method
8270, RCRA 8-Metals by EPA Methods 6010/7471, and hexavalent chromium by EPA Method
7199 in accordance with the attached Table 1. Dissolved metals samples will be collected by field
filtering directly into laboratory supplied/preserved containers using new dedicated 0.45 micron
disposable filters.
One duplicate groundwater sample will also be collected for QA/QC purposes. The duplicate,
identified as DUP-3, will be submitted for the same groundwater analyses as listed above (See
Table 1).
Following surveying, depth to groundwater monitoring and groundwater sample collection, the
borings will be abandoned by a North Carolina Certified Well Contractor. Both well construction
forms and well abandonment forms will be provided. Borings logs for the proposed soil and
groundwater sample locations will be completed and included in the report prepared as a result
of this work plan.
3.4 Soil Gas Sample Collection
Twelve soil gas samples will be collected. Five will be exterior soil gas samples, identified as SG-
1 through SG-5, placed in locations correlating with the proposed redevelopment's stairwells and
elevator shafts. Two will be interior sub -slab soil gas samples, identified as SG-6 and SG-7,
collected from within the Acme Plumbing and Heating offices; Building 1 on Figure 2. Two will be
interior sub -slab soil gas samples, identified as SG-8 and SG-9, collected from within the existing
Motorco structure, Building 6 on Figure 2. The remaining three will be interior sub -slab soil gas
samples, identified as SG-10 through SG-12, collected from within the Acme Garage, Building 3
on Figure 2. The approximate locations of the proposed interior and exterior soil gas samples are
illustrated on Figure 4.
The soil gas sampling will be conducted in general accordance with the NCDEQ Vapor Intrusion
Guidance (March 2018, Version 2) using individually certified 1-Liter Summa canisters. The
exterior soil gas sampling points will be installed by the North Carolina Certified Well Contractor
using DPT. The interior soil gas samples will be collected by drilling through the concrete slabs
using a hammer drill. Samples will be analyzed by EPA Method TO-15 for VOCs. Refer to Table
1 for proposed sample depths.
For exterior soil gas samples, once each boring has reached its predetermined termination depth,
dedicated Nylafow tubing and an air stone will be lowered into the boring. The end of the Nylaflow
tubing will be fitted with an airtight cap to prevent exchange with ambient air. Nylaflow tubing is
acceptable for the soil gas sample collection taking place on this site due to the temporary nature
of their installation. Coarse filter sand will be placed around and approximately 5 inches above
the air stone. The remaining space above the sand will consist of bentonite granules which will
be hydrated with distilled water. The soil gas probes will be allowed to stabilize for approximately
four hours before soil gas sample collection.
For interior sub -slab soil gas samples, once the concrete slab is penetrated, a section of dedicated
Nylafow tubing and an air stone will be lowered into the boring. The end of the Nylaflow tubing
will be fitted with an airtight cap to prevent exchange with ambient air. Nylaflow tubing is
acceptable for the soil gas sample collection taking place on this site due to the temporary nature
of their installation. Each sub -slab soil gas sample point will be completed with an airtight seal of
VOC-free putty applied at the surface of the slab surrounding the Nylafow tubing. The installed
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sub -slab soil gas sample points will be allowed to equilibrate for approximately four hours prior to
sampling activities.
Prior to collecting the soil gas samples in individually certified 1-Liter Summa canisters, a shut-in
test will be conducted to assess for leaks. Helium gas will be used as a quality assurance control
measure to confirm the integrity of the probe seal at each sample location. A plastic container
(approximately 7.5 gallons) will be placed and sealed over the sampling point, train, and Summa
canister, then purged with helium gas. The probe point tubing and tracer gas tubing will be placed
through the cylinder wall via rubber grommets. The cylinder will be placed on a rubber -like gasket
and held securely to the slab with a heavy weight. During the purging stage, the cylinder will be
flooded with helium gas via the hose placed through the cylinder wall and connected to a reusable
Tedlar airbag.
A Model MGD-2002 Multi -Gas Leak detector or similar will be connected to the Tedlar airbag and
the air stream being purged will be measured for helium. A helium concentration of less than ten
percent helium will be considered acceptable. If concentrations greater than ten percent helium
is measured, the probe tube seal will be resealed and the leak detection process will be repeated.
This process must be completed three times in succession with the results being below ten
percent prior to collecting the sample.
A dedicated syringe will then be used at each sample location and connected to the tubing to
purge the tubing. Approximately three volumes of the tubing plus the void space in the sand
packing will be purged prior to sample collection. The tubing will be connected to a 1-liter Summa
canister, which will be used to collect the sample. The Summa canister will be fitted with a flow
regulator. The flow rate for both purging and sample collection will be approximately 0.2 liters per
minute. The vacuum in the canister will be recorded before and after sample collection. Sample
collection will terminate when the vacuum reaches approximately 5 inches of mercury (in-Hg).
Other parameters that will be measured include ambient temperature before and after sample
collection and weather conditions at the time of sample collection.
Two duplicate soil gas samples, collected with a sample "T" in a 1-Liter individually certified
Summa canister, are to be collected from the approximate proposed interior sub -slab soil gas
sample location identified as SG-6. The samples, identified as DUP-4 and DUP-5, will be
submitted for the same air analysis as listed above (See Table 1).
The probes will be removed and the exterior sampling points abandoned by the North Carolina
Certified Well Contractor in accordance with NCAC 2C standards. Interior soil gas samples will
be backfilled with bentonite granules, completed at the surface with VOC free putty or grout.
3.5 Deviation from Approved Plan
This work plan is intended to be dynamic and to be adapted to specific and actual site conditions.
Accordingly, should such conditions warrant a change either by addition, deletion or modification
of a procedure, such may be accomplished with agreement between Geerhouse Partners
representative and ECS after consultation with, and subject to approval by the Program. Such
changes will comply with applicable local, State, and Federal rules and regulations. A written
amendment shall be prepared and submitted to the Program for approval (the use of e-mail
correspondence shall suffice for approval). Amendments must have the approval of the Program
prior to implementation.

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4.0 LABORATORY ANALYSIS
4.1 Soil Analytical
Following soil sample collection, the sample containers will be labeled and maintained under
chain -of -custody until delivered to a North Carolina certified laboratory for analysis. A Chain -of -
Custody document will be utilized throughout the collection and transportation of the samples.
Soil samples will be analyzed for VOCs by EPA Method 8260, SVOCs by EPA Method 8270, RCRA
8-metals by EPA Methods 6020/7471 and Cr VI by EPA Method 7199.
The one duplicate soil sample will also be collected into laboratory supplied/preserved containers
and submitted for analysis of VOCs by EPA Method 8260, SVOCs by EPA Method 8270, EPA
Method 6020/7471 for RCRA 8-Metals, and Cr VI by EPA Method 7199.
Field screening will be conducted with a PID or similar device. The ECS environmental professional
will examine the soil and note the color and texture of the soil and if the soil exhibits staining or
exudes distinguishable odors. Representative samples are to be collected from the 5 foot depth
interval exhibiting greatest field screened volatile organic vapor concentration. If no volatile organic
vapors are detected then a representative sample will be collected from the upper 5-feet of the boring
(See Table 1 for specific boring depths). The laboratory's Reporting Limits (RLs) and/or Method
Detection Limits (MDLs) will be reported at or below Residential and Industrial/Commercial
Preliminary Soil Remediation Goals (PSRGs) (to the extent feasible) and J Flags (laboratory
estimated concentrations) will be reported. A Level II QA/QC package will be reported by the
laboratory.
4.2 Groundwater Analytical
Following groundwater sample collection, the sample containers will be labeled and maintained
under chain -of -custody until delivered to a North Carolina certified laboratory located for analysis.
A Chain -of -Custody document will be utilized throughout the collection and transportation of the
samples. The groundwater samples will be analyzed for VOCs using EPA Method 8260, SVOCs
using EPA Method 8270, for RCRA 8-Metals by EPA Method 6010, and for Cr VI using EPA
Method 7199. The laboratory's RLs and/or MDLs will be reported at or below NC2LGWQS and
the Residential and Non -Residential Vapor Intrusion Screening Levels (VISLs) (to the extent
feasible) and J Flags (laboratory estimated concentrations) will be reported. A Level II QA/QC
package will be reported by the laboratory.
4.3 Soil Gas Analytical
Individually certified 1-Liter Summa canisters utilized for interior and exterior soil gas sampling
will be labeled and shipped to a National Environmental Laboratory Accredited (NELAC)
laboratory for analysis of VOCs using EPA Method TO-15.
The laboratory will be instructed to analyze the samples with method detection limits applicable
to North Carolina Brownfields Project sites with instructions to report with a Level II QA/QC
package and J-Flags. Sampling procedures will be conducted per the DWM NCDEQ Vapor
Intrusion Guidance, dated March 2018, Version 2. Comparison criteria shall include the most
recent version of the DWM NCDEQ Residential and Non -Residential VISLs.
5.0 QA/QC
5.1 Soil Samples
One duplicate soil sample will be collected in laboratory supplied/preserved containers and
submitted for analysis of VOCs and SVOCs by EPA Method 8260 and 8270, respectively, and of
total RCRA 8 metals plus hexavalent chromium using EPA Methods 6020/7471/7199. Sufficient
sample volume will be collected in order for the laboratory to run MS/MSD analysis. Following
0

Wright's Executive Sales - Brownfields Environmental Assessment Work Plan Rev 1.0
Brownfields Project #24007-20-032
sample collection, the sample containers will be labeled and maintained under chain -of -custody
until delivered to the North Carolina certified laboratory. A Chain -of -Custody document will be
utilized throughout the collection and transportation of the samples.
5.2 Groundwater Samples
One duplicate groundwater sample will be collected in laboratory supplied/preserved containers
and submitted for analysis of VOCs and SVOCs by EPA Method 8260 and 8270, RCRA 8-Metals
by EPA Method 6010/7471, and hexavalent chromium by EPA Method 7199. Dissolved metals
samples will be collected by field filtering directly into laboratory supplied/preserved containers
using new dedicated 0.45 micron disposable filters.
One trip blank per cooler will also be analyzed for VOCs using EPA Method 8260. Sufficient
sample volume will be collected in order for the laboratory to run MS/MSD analysis. Following
sample collection, the sample containers will be labeled and maintained under chain -of -custody
until delivered to the North Carolina certified laboratory. A Chain -of -Custody document will be
utilized throughout the collection and transportation of the samples.
5.3 Soil Gas Samples
Each 1-Liter Summa canister will be individually certified for the interior and exterior soil gas
samples. Following sample collection, the canisters will be labeled and shipped to the NELAC
laboratory under proper chain -of -custody procedures maintained throughout the sample
collection and transportation process.
One duplicate soil gas sample will be collected for laboratory analysis by EPA Method TO-15
utilizing a sampling "T". Following sample collection, the individually certified 1-Liter Summa
canister will be labeled and maintained under chain -of -custody until delivered to the NELAC
laboratory. A Chain -of -Custody document will be utilized throughout the collection and
transportation of the samples.
6.0 INVESTIGATION DERIVED WASTE MANAGEMENT
The investigative derived waste (IDW) expected to be generated includes soil from the soil borings
and temporary monitoring well installations, and groundwater from the temporary well development
and groundwater sampling activities. IDW will be containerized onsite pending receipt of laboratory
analytical results and will be subsequently managed in accordance with the NCDEQ, Inactive
Hazardous Sites Program Guidelines for Assessment and Cleanup (October 2015).
7.0 REPORTING
ECS will prepare a written report documenting the field activities, sampling procedures, laboratory
analytical results, conclusions, and recommendations for submission to the Program. The report
will include sample location figures, including a shallow groundwater surface map with graphic
scale and north arrow, soil and groundwater sample result summary tables, and copies of the
North Carolina certified/NELAC laboratory analytical reports. Soil boring logs, monitoring well
installation/abandonment records, and field screening calibration documentation will also be
included as additional information located in Appendices to the report. The final report will include
ECS's registered Geologist Firm number and bare the seal of the certifying NC Licensed
Geologist.
10

FIGURES

RON�1V�;�iiija
5
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I
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+
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w C�
APPROXIMATE BROWNFIELD PROPERTY BOUNDARY
SOURCE: FIGURE 1
USGS TOPOGRAPHIC MAP SITE TOPOGRAPHIC LOCATION MAP
7.5 MINUTE SERIES
NORTHWEST DURHAM, NC (TOP) + Wright's Executive Sales
SOUTHWEST DURHAM, NC (BOTTOM) Brownfields Project Number 24007-20-032
DATED: 2019 721 & 723 Rigsbee Ave; 620 & 616 Foster St.
SCALE: 1 : 24,000 Durham, Durham County, North Carolina
CONTOUR INVERVAL = 10' TM ECS Project Number: 49-10039-A REV 1.0

-Arnie F'$amwnj7 and Hoai g amNs and
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FIGURE 2
SOURCE: SITE FEATURES MAP
ECS Southeast, LLP
Phase I ESA, December 6, 2019 Wright's Executive Sales
Brownfields Project Number 24007-20-032
APPROXIMATE SCALE: 721 & 723 Rigsbee Ave; 620 & 616 Foster St.
100 FT. �i M Durham, Durham County, North Carolina
ECS Project Number: 49-10039-A REV 1.0

� T
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Ali S r• .� r r r_�* r r 1 r,
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# ® APPROXIMATE HISTORIC MONITORING WELL LOCATION
Laa : r : '• _ a11�.aaIG�.'Q4EY0. =f, ® APPROXIMATE HISTORIC SOIL SAMPLE LOCATION
® APPROXIMATE B-1 SAMPLE LOCATION
FIGURE 3
SOURCE: HISTORIC SAMPLE LOCATION MAP
ECS Southeast, LLP s
Phase I ESA, December 6, 2019 Wright's Executive Sales
Brownfields Project Number 24007-20-032
APPROXIMATE SCALE: 721 & 723 Rigsbee Ave; 620 & 616 Foster St.
SO FT. �i M Durham, Durham County, North Carolina
ECS Project Number: 49-10039-A REV 1.0

.
P0
Ali sS r' .� r r r_� •.r : r ,
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® r
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SITE PROPERTY BOUNDARY
® PROPOSED SUB -SLAB SOIL GAS SAMPLE LOCATION
® PROPOSED SOIL GAS SAMPLE LOCATION
_ F'�ad '� ® PROPOSED GROUNDWATER & SOIL SAMPLE LOCATION
' caa :: r:: -: _ -iMMMIte. e«EpO. =c ® PROPOSED SOIL SAMPLE LOCATION
PROPOSED GROUNDWATER SAMPLE LOCATION
FIGURE 4
SOURCE: PROPOSED SAMPLE LOCATION MAP
ECS Southeast, LLP s
Phase I ESA, December 6, 2019 Wright's Executive Sales
Brownfields Project Number 24007-20-032
APPROXIMATE SCALE: 721 & 723 Rigsbee Ave; 620 & 616 Foster St.
SO FT. i M Durham, Durham County, North Carolina
ECS Project Number: 49-10039-A REV 1.0

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SITE PROPERTY BOUNDARY
Ira : r:: -: _eaEro,icubeff_ �1 5 _ _ ® PROPOSED BORING LOCATION
FIGURE 5
SOURCE: PROPOSED IN -SITU BORING LOCATION MAP
ECS Southeast, LLP
Phase I ESA, December 6, 2019 Wright's Executive Sales
Brownfields Project Number 24007-20-032
APPROXIMATE SCALE: 721 & 723 Rigsbee Ave; 620 & 616 Foster St.
SO FT. Durham, Durham County, North Carolina
TM ECS Project Number: 49-10039-A REV 1.0

� T
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— -
ANJ
SITE PROPERTY BOUNDARY
® PROPOSED SUB -SLAB SOIL GAS SAMPLE LOCATION
® PROPOSED SOIL GAS SAMPLE LOCATION
F'.r0 ® PROPOSED GROUNDWATER & SOIL SAMPLE LOCATION
Lea" :. e:: '�. _ ' _)It3 unbu. GepO.'I:
� i#E® PROPOSED SOIL SAMPLE LOCATION
PROPOSED GROUNDWATER SAMPLE LOCATION
NAML—iFIGURE 6
SOURCE: PROPOSED SAMPLE LOCATION MAP WITH
ECS Southeast, LLP s PROPOSED DEVELOPMENT OVERLAY
Phase I ESA, December 6, 2019 Wright's Executive Sales
Brownfields Project Number 24007-20-032
APPROXIMATE SCALE: 721 & 723 Rigsbee Ave; 620 & 616 Foster St.
SO FT. i M Durham, Durham County, North Carolina
ECS Project Number: 49-10039-A REV 1.0

TABLE

TABLE 1: WFUGHT'S EXECUTIVE SALES PROPOSED SAMPLE AND ANALYTICAL DESCRIPTIONS
Brownfields Environmental Assessment Work Plan - Wright's Executive Sales
Brownfields Program Site No. 24007-20-032
721 and 723 Rigsbee Avenue, 620 and 616 Foster Street, Durham, Durham County, North Carolina
ECS Project No. 49:10039-A
PROPOSED SAMPLE ID PARCEL ADDRESS & PIN SAMPLING OBJECTIVE DEPTH OF COLLECTION ANALYTICAL METHOD SAMPLE DURATION
PROPOSED SUB -SLAB and SOIL GAS SAMPLING
620 FOSTER ST.
Assess soil gas in vicinity of a future planned
EPA Method TO-15
SG-1
(0822-08-90-2088)
stairwell/elevator shaft; approximately 5-feet above the
-5 feet bgs
(1 Liter Certified Summa Canister)
5 Minutes (200 mL/min.)
groundwater surface.
723 RIGSBEE AVE.
Assess soil gas in vicinity of a future planned
EPA Method TO-15
SG-2
(0822-20-90-4169)
stairwell/elevator shaft; approximately 5-feet above the
-5 feet bgs
(1 Liter Certified Summa Canister)
5 Minutes (200 mL/min.)
groundwater surface.
FOSTER ST.
Assess soil gas in vicinity of a future planned
EPA Method Tu
15
SG-3
(082821-08-99-2971)
stairwell/elevator shaft; approximately 5-feet above the
-5 feet bgs
(1 Liter Certifiedd Summa Canister)
5 Minutes (200 mL/min.)
groundwater surface.
616 FOSTER ST.
Assess soil gas in vicinity of a future planned
EPA Method TO-15
SG-4
(0821-08-99-2971)
stairwell/elevator shaft; approximately 5-feet above the
-5 feet bgs
(1 Liter Certified Summa Canister)
5 Minutes (200 mL/min.)
groundwater surface.
SG-5
620 FOSTER ST.
Assess soil gas in the vicinity of SS-3/GW-3, just south of the
-5 foot bgs
EPA Method TO-15
10 Minutes (200 mL/min.)
(0822-08-90-2088)
Acme garage.
(1 Liter Certified Summa Canister)
SG-6
620 FOSTER ST.
Assess sub -slab soil gas quality in the vicinity of future
-1 foot bgs
EPA Method TO-15
10 Minutes (200 mL/min.)
(0822-08-90-2088)
planned elevator shaft; sub -slab. (Acme Office)
(1 Liter Certified Summa Canister)
SG-7
620 FOSTER ST.
(0822-08-90-2088)
Assess sub -slab soil gas in the existing Acme Office Building.
-1 foot bgs
EPA Method TO-15
(1 Liter Certified Summa Canister)
5 Minutes (200 mL/min.)
SG-8
723 RIGSBEE AVE.
Assess sub -slab soil gas in the existing Motorco building
-1 foot bgs(1
EPA Method TO-15
5 Minutes (200 mL/min.)
(0822-20-90-4169)
which is to remain on the redeveloped property.
Liter Certified Summa Canister)
SG-9
723 RIGSBEE AVE.
Assess sub -slab soil gas in the existing Motorco building
-1 foot bgs
EPA Method TO-15
5 Minutes (200 mL/min.)
(0822-20-90-4169)
which is to remain on the redeveloped property.
(1 Liter Certified Summa Canister)
SG-10
620 FOSTER ST.
(0822-08-90-2088)
Assess sub -slab soil gas in the existing Acme Garage.
-1 foot bgs
EPA Method TO-15
(1 Liter Certified Summa Canister)
5 Minutes (200 mL/min.)
SG-11
620 FOSTER ST.
Assess sub -slab soil gas in the existing Acme Garage.
-1 foot bgs
EPA Method TO-15
5 Minutes (200 mL/min.)
(0822-08-90-2088)
(1 Liter Certified Summa Canister)
SG-12
620 FOSTER ST.
(0822-08-90-2088)
Assess sub -slab soil gas in the existing Acme Garage.
-1 foot bgs
EPA Method TO-15
(1 Liter Certified Summa Canister)
5 Minutes (200 mL/min.)
Page 1 of 4

TABLE 1: WFUGHT'S EXECUTIVE SALES PROPOSED SAMPLE AND ANALYTICAL DESCRIPTIONS
Brownfields Environmental Assessment Work Plan - Wright's Executive Sales
Brownfields Program Site No. 24007-20-032
721 and 723 Rigsbee Avenue, 620 and 616 Foster Street, Durham, Durham County, North Carolina
ECS Project No. 49:10039-A
PROPOSED SAMPLE ID PARCEL ADDRESS & PIN SAMPLING OBJECTIVE DEPTH OF COLLECTION ANALYTICAL METHOD SAMPLE DURATION
PROPOSED SOIL SAMPLING
5 foot depth interval exhibiting
EPA Method 8260;
SS-1
620 FOSTER ST.
Assess soil quality in the vicinity of former USTs
greatest field screened soil vapor
EPA Method 8270;
RCRA 8-metals by EPA Methods
N/A
(0822-08-90-2088)
concentration from 0 to 35 feet
6020/7471;
bgs.
& Cr VI by EPA Method 7199
5 foot depth interval exhibiting
EPA Method 8260;
SS-2
620 FOSTER ST.
Assess soil quality in the vicinity of proposed Brownfield
greatest field screened soil vapor
EPA Method 8270;
RCRA 8-metals by EPA Methods
N/A
(0822-08-90-2088)
redevelopment
concentration from 0 to 35 feet
6020/7471;
bgs.
& Cr VI by EPA Method 7199
5 foot depth interval exhibiting
EPA Method 8260;
SS-3
616 FOSTER ST.
Assess soil quality downgradient of the former Murphy
greatest field screened soil vapor
EPA Method 8270;
RCRA 8-metals by EPA Methods
N/A
(0821-08-99-2971)
Elwood Automotive site on the eastern adjacent property.
concentration from 0 to 35 feet
602017471;
bgs.
& Cr VI by EPA Method 7199
5 foot depth interval exhibiting
EPA Method 8260;
SS-4
721 RIGSBEE AVE.
Assess soil quality downgradient of the former Murphy
greatest field screened soil vapor
EPA Method 8270;
RCRA 8-metals by EPA Methods
N/A
(0822-08-90-4036)
Elwood Automotive site on the southern adjacent property.
concentration from 0 to 25 feet
602017471;
bgs.
& Cr VI by EPA Method 7199
5 foot depth interval exhibiting
EPA Method 8260;
SS-5
721 RIGSBEE AVE.
Assess soil quality downgradient of the former Murphy
greatest field screened soil vapor
EPA Method 8270;
RCRA 8-metals by EPA Methods
N/A
(0822-08-90-4036)
Elwood Automotive site on the southern adjacent property.
concentration from 0 to 25 feet
602017471;
bgs.
& Cr VI by EPA Method 7199
5 foot depth interval exhibiting
EPA Method 8260;
721/723 RIGSBEE AVE.
greatest Feld screened soil vapor
EPA Method 8270;
SS-6
(0822-08-90-4036,
Assess soil quality in the vicinity of former USTs
concentrationfrom0 to 25 feet
RCRA 8-metals by EPA Methods
N/A
0822-20-90-4169)
6020/7471;
& Cr VI by EPA Method 7199
5 foot depth interval exhibiting
EPA Method 8260;
SS-7
620 FOSTER ST.
Assess soil quality near former Acme UST removed in 1989.
greatest field screened soil vapor
EPA Method 8270;
RCRA 8-metals by EPA Methods
N/A
(0822-08-90-2088)
concentration from 0 to 15 feet
602017471;
bgs.
& Cr VI by EPA Method 7199
5 foot depth interval exhibiting
EPA Method 8260;
SS-8
620 FOSTER ST.
Assess soil quality near former Acme UST removed in 1989.
greatest field screened soil vapor
EPA Method 8270;
RCRA 8-metals by EPA Methods
N/A
(0822-08-90-2088)
concentration from 0 to 15 feet
602017471;
bgs.
& Cr VI by EPA Method 7199
EPA Method 8260;
SS-9
620 FOSTER ST.
Assess soil quality near former Diesel AST and Cutting Oil
5 foot depth
EPA Method 8270;
RCRA 8-metals by EPA Methods
N/A
(0822-08-90-2088)
Drum Storage
s02017471;
& Cr VI by EPA Method 7199
EPA Method 8260;
SS-10
620 FOSTER ST.
Assess soil quality near former Diesel AST and Cutting Oil
5 foot depth
EPA Method 8270;
RCRA 8-metals by EPA Methods
N/A
(0822-08-90-2088)
Drum Storage
6020/7471;
& Cr VI by EPA Method 7199
Page 2 of 4

TABLE 1: WRIGHT'S EXECUTIVE SALES PROPOSED SAMPLE AND ANALYTICAL DESCRIPTIONS
Brownfields Environmental Assessment Work Plan - Wright's Executive Sales
Brownfields Program Site No. 24007-20-032
721 and 723 Rigsbee Avenue, 620 and 616 Foster Street, Durham, Durham County, North Carolina
ECS Project No. 49:10039-A
PROPOSED SAMPLE ID PARCEL ADDRESS & PIN SAMPLING OBJECTIVE I DEPTH OF COLLECTION ANALYTICAL METHOD SAMPLE DURATION
PROPOSED IN -SITU SOIL SAMPLING
Assess soil quality, characterize soil, and analyze contents.
EPA Method 8260;
620 FOSTER ST.
To provide a horizontal composite of the soil quality at
EPA Method 8270;
IS-1-1
(0822-08-90-2088)
varying depths. (Representative composite sample collected
0-5 foot depth
RCRA 8-metals by EPA Methods
N/A
from B-1, B-2, and B-3 from 0-5' in approximate locations
6020/7471;
illustrated on Figure 5.)
& Cr VI by EPA Method 7199
620 FOSTER ST. &
Assess soil quality, characterize soil, and analyze contents.
EPA Method 8260;
7211723 RIGSBEE AVE.
To provide a horizontal composite of the soil quality at
EPA Method 8270;
IS-2-1
(0822-08-90-2088,
varying depths. (Representative composite sample collected
0-5 foot depth
RCRA 8-metals by EPA Methods
N/A
0822-08-90-4036,
from B4, B-5, and B-6 from 0-5' in approximate locations
602017471;
0822-20-90-4169)
illustrated on Figure 5.)
& Cr VI by EPA Method 7199
620 FOSTER ST. &
Assess soil quality, characterize soil, and analyze contents.
EPA Method 8260;
7211723 RIGSBEE AVE.
To provide a horizontal composite of the soil quality at
EPA Method 8270;
IS-2-2
(0822-08-90-2088,
varying depths. (Representative composite sample collected
5-10 foot depth
RCRA 8-metals by EPA Methods
N/A
0822-08-90-4036,
from B-4, B-5, and B-6 from 5-1 V in approximate locations
6020/7471;
0822-20-90-4169)
illustrated on Figure 5.)
& Cr VI by EPA Method 7199
Assess soil quality, characterize soil, and analyze contents.
EPA Method 8260;
7211723 RIGSBEE AVE.
To provide a horizontal composite of the soil quality at
EPA Method 8270;
IS-3-1
(0822-08-90-4036,
varying depths. (Representative composite sample collected
0-5 foot depth
RCRA 8-metals by EPA Methods
N/A
0822-20-90-4169)
from B-7 and B-8 from 0-5' in approximate locations
602017471;
illustrated on Figure 5.)
& Cr VI by EPA Method 7199
Page 3 of 4

TABLE 1: WRIGHT'S EXECUTIVE SALES PROPOSED SAMPLE AND ANALYTICAL DESCRIPTIONS
Brownfields Environmental Assessment Work Plan - Wright's Executive Sales
Brownfields Program Site No. 24007-20-032
721 and 723 Rigsbee Avenue, 620 and 616 Foster Street, Durham, Durham County, North Carolina
ECS Project No. 49:10039-A
PROPOSED SAMPLE ID PARCEL ADDRESS & PIN SAMPLING OBJECTIVE
DEPTH OF COLLECTION ANALYTICAL METHOD SAMPLE DURATION
PROPOSED GROUNDWATER
SAMPLING
EPA Method 8260;
620 FOSTER ST.
EPA Method 8270;
GW-1
(0822-08-90-2088)
Assess groundwater quality in the vicinity of former USTs
—35 feet bgs
RCRA 8-metals by EPA Methods
N/A
601017471;&
Cr VI by EPA Method 7199
EPA Method 8260;
GW-2
620 FOSTER ST.
Assess groundwater quality in the vicinity of the proposed
—35 feet bgs
EPA Method 8270;
RCRA 8-metals by EPA Methods
N/A
(0822-08-90-2088)
Brownfields Redevelopment
601017471;&
Cr VI by EPA Method 7199
EPA Method 8260;
616 FOSTER ST.
Assess groundwater quality downgradient of the former
EPA Method 8270;
GW-3
(0821-08-99-2971)
Murphy Elwood Automotive site on the southern adjacent
—35 feet bgs
RCRA 8-metals by EPA Methods
N/A
property.
601017471;&
Cr VI by EPA Method 7199
EPA Method 8260;
721 RIGSBEE AVE.
Assess groundwater quality downgradient of the former
EPA Method 8270;
GW-4
(0822-08-90-4036)
Murphy Elwood Automotive site on the southern adjacent
—25 feet bgs
RCRA 8-metals by EPA Methods
MIA
property.
601017471;&
Cr VI by EPA Method 7199
EPA Method 8260;
721 RIGSBEE AVE.
Assess groundwater quality downgradient of the former
EPA Method 8270;
GW-5
(0822-08-90-4036)
Murphy Elwood Automotive site on the southern adjacent
—25 feet bgs
RCRA 8-metals by EPA Methods
N/A
property.
601017471;&
Cr VI by EPA Method 7199
EPA Method 8260;
7211723 RIGSBEE AVE.
Assess groundwater quality in the vicinity of the proposed
EPA Method 8270;
GW-6
(0822-08-90-4036,
Brownfields Redevelopment
—25 feet bgs
RCRA 8-metals by EPA Methods
N/A
0822-20-90-4169)
601017471;&
Cr VI by EPA Method 7199
EPA Method 8260;
GW-7
620 FOSTER ST.
Assess groundwater quality downgradient of the Acme
—25 feet bgs
EPA Method 8270;
RCRA is by EPA Methods
N/A
(0822-08-90-2088)
garage.
6010/771;&
&
Cr VI by EPA Method 7199
QA/QC SAMPLING
EPA Method 8260;
Depth to match that of soil sample
EPA Method 8270;
DUP-1 (SOIL)
TBD
Duplicate Soil Sample for QA/QC purposes.
being duplicated
RCRA 8-metals by EPA Methods
N/A
6020/7471; & Cr VI by EPA Method
7199
EPA Method 8260;
DUP-2 (IN -SITU)
TBD
Duplicate In -Situ Soil Sample for CIA/QC purposes.
Depth horizon to match that of in-
EPA Method 8270;
RCRA 8-metals by EPA Methods
N/A
situ soil sample being duplicated
602017471; & Cr VI by EPA Method
7199
EPA Method 8260;
EPA Method 8270;
DUP-3 (GROUNDWATER)
TBD
Duplicate of Groundwater Sample for QA/QC purposes.
N/A
RCRA 8-metals by EPA Methods
N/A
601017471;&
Cr VI by EPA Method 7199
DUP-4 (SOIL GAS)
620 FOSTER ST.
(0822-08-90-2088)
Duplicate of proposed sub -slab soil gas sample SG-5.
1 foot bgs
EPA Method TO-15
(1 Liter Certified Summa Canister)
10 Minutes (200 mL/min.)
DUP-5 (SOIL GAS)
TBD
Duplicate of proposed sub -slab soil gas sample for QA/QC
1 foot bgs
EPA Method TO-15
10 Minutes (200 mL/min.)
purposes.
(1 Liter Certified Summa Canister)
NOTES:
1.) SS denotes soil samples
2.) GW denotes groundwater samples
3.) SG denotes soil gas samples
4.) CUP denotes duplicate
5.) CA/QC denotes Quality Assurance/Quality Control
6.) A North Carolina certified laboratory will be retained to perform the soil and groundwater analysis.
7.) A NELAC Accredited Laboratory is to be retained to pre -certify Summa canisters and perform TO-15 air analyses.
8.) A sampling tee will be utilized during the sampling of proposed sub -slab soil gas sample SG-5 for the air sample duplicate.
9.) If no soil vapors are detected during the performance of soil borings to be taken greater than 5 feet bgs, than the interval from the top 5 feet will be sampled for analysis.
10.) Groundwater samples for metals will be field filtered using new dedicated 0.45 micron disposal filters.
Page 4 of 4

APPENDIX A

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GeerHouse — Excavation Depths