24007_Wrights Executive Sales II_Final Grade Sampling Work Plan_20240229

ECS SOUTHEAST, LLP "Setting the Standard for Service"
Geotechnical • Construction Materials • Environmental • Facilities NC Registered Engineering Firm F-1078
NC Registered Geologists Firm C-553
SC Registered Engineering Firm 3239
February 29, 2024
Ms. Lauren Fleming
North Carolina Department of Environmental Quality
Division of Waste Management
Brownfields Redevelopment Section
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Reference: Final Grade Sampling Work Plan
Wright's Executive Sales II
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-B
To whom it may concern:
ECS Southeast, LLP (ECS) has prepared the attached Final Grade Sampling Work Plan (Work Plan)
for your review and approval. Please review the Work Plan and provide return correspondence
indicating NC Brownfields Redevelopment Section approval. ECS greatly appreciates the
opportunity to work with your Section. If there are questions regarding the attached, or a need
for further information, please contact us.
Respectfully submitted,
ECS SOUTHEAST, LLP
Ron Navarro, P.G.
Environmental Project Manager
[e-mail]
�d
Scott M. Werley, F.G.
Environmental Principal
[e-mail]
ECS Capitol Services, PLLC • ECS Florida, LLC • ECS Mid -Atlantic, LLC • ECS Midwest, LLC • ECS Southeast, LLP • ECS Southwest, LLP
wvvw.ecslimited.com

TIA
FINAL GRADE SAMPLING WORK PLAN - REVISION 1.0
WRIGHT'S EXECUTIVE SALES II
721 AND 723 RIGSBEE AVENUE; 620 AND 616 FOSTER STREET
DURHAM, DURHAM COUNTY, NORTH CAROLINA
BROWNFIELDS PROJECT NO. 24007-20-032
PREPARED FOR
GEERHOUSE OWNER, LLC
FEBRUARY 29, 2024
Work Plan Certification
I, Scott Werley, P.G., a Licensed Geologist for ECS Southeast, LLC (NC Registered Geologist Firm
C-553), do certify that the information contained herein is correct and accurate to the best of
my knowledge.
Scott Werley, P.G.
NC License No. 2354
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Wright's Executive Sales 11
Durham, Durham County, North Carolina
Final Grade Sampling Workplan — Revision 1.0
Brownfields Project #24007-20-032
February 29, 2024
TABLE OF CONTENTS
1.0 INTRODUCTION........................................................................................................................ 2
1.1 Project Information........................................................................................................2
1.2 Proposed Sampling.........................................................................................................2
2.0 SCOPE OF WORK....................................................................................................................... 2
2.1 Sample Collection...........................................................................................................2
2.2 Deviation from Approved Plan.......................................................................................2
3.0 SAMPLING METHODOLOGY............................................................................................................ 3
3.1 Sampling Methodology...................................................................................................3
4.0 LABORATORY ANALYSIS............................................................................................................ 3
4.1 Soil Analytical..................................................................................................................3
5.0 QA/QC......................................................................................................................................4
6.0 INVESTIGATION DERIVED WASTE (IDW) MANAGEMENT...........................................................4
7.0 REPORTING..............................................................................................................................4
FIGURES
Figure 1 - Site Topographic Location Map
Figure 2 — Brownfield Parcel Location Map
Figure 3 - Final Grade Sampling Map
TABLES
Table 1— Proposed Sample Locations & Analysis
1

Wright's Executive Sales 11
Durham, Durham County, North Carolina
Final Grade Sampling Workplan — Revision 1.0
Brownfields Project #24007-20-032
February 29, 2024
1.0 INTRODUCTION
1.1 Protect Information
The subject site is located in Durham, Durham County, North Carolina. The site is currently in the North
Carolina Brownfields Redevelopment Section (BRS) and is identified as Brownfields Project Number
24007-20-032. The subject site formerly consisted of five parcels that have later been consolidated into
two parcels identified as Durham County Parcel Identification Numbers (PINS) 0822903182 and
082199297413. The site consists of approximately 2.37 acres of land (Figures 1 and 2).
The objective of this work plan is to maintain the liability protections offered by the Brownfields Program
by characterizing surficial soil not covered by hardscape at the site after redevelopment.
1.2 Proposed Sampling
The patio redevelopment activities have been completed at the site. In accordance with the approved
Environmental Management Plan (EMP) for the site (revised and approved on June 7, 2022), this Work
Plan has been developed for the collection of surficial soil samples in portions of the site not covered by
hardscape.
The site green space has been divided into three (3) representative areas and five soil borings will be
advanced in each area to a depth of two feet below the ground surface (bgs) (Figure 3). One set of
representative final grade soil samples (grab and composite) will be collected from each area. This Work
Pplan for the final grade soil sampling will be required to be approved by the Brownfields Project Manager
prior to its implementation. The data collected during this assessment is intended for use only by
Brownfields and not by other NCDEQ programs.
2.0 SCOPE OF WORK
2.1 Sample Collection
Soil sampling will occur from the green space at the site which has been subdivided into three (3)
representative areas (Figure 3). The three representative areas include landscaped portions of the rooftop
patio area and the eastern and western portions of the landscaped community corridor. Five
representative soil borings will be advanced in each of the three (3) areas to a depth of two feet bgs. One
set of soil samples (composite and grab) will be collected from each of the three areas. Composite samples
will be collected from zero (0) to two (2) feet bgs. Grab samples will be collected from one (1) to two (2)
feet bgs. The soil samples will be submitted to a North Carolina Certified laboratory for analysis.
Representative composite soil samples will be submitted for laboratory analysis of semi -volatile organic
compounds (SVOCs), Resource Conservation and Recovery Act (RCRA) Metals, and hexavalent chromium
(Cr VI). Grab soil samples will be submitted for laboratory analysis of volatile organic compounds (VOCs).
2.2 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
N

Wright's Executive Sales 11
Durham, Durham County, North Carolina
Final Grade Sampling Workplan — Revision 1.0
Brownfields Project #24007-20-032
February 29, 2024
procedure, such may be accomplished with agreement between Geerhouse Owner, LLC representatives
and ECS after consultation with, and subject to approval by BRS. Such changes will comply with applicable
local, State and Federal rules and regulations. A written amendment shall be prepared and submitted to
BRS for approval prior to implementation. Amendments must have the approval of BRS prior to
implementation.
3.0 SAMPLING METHODOLOGY
3.1 Sampling Methodology
Soil sampling and analysis is to be conducted for VOCs by EPA Method 8260, SVOCs by EPA Method 8270,
RCRA metals by EPA Method 6020, and Cr VI by EPA Method 7199. The sampling activities will be
conducted in general accordance with the most recent Science and Ecosystem Support Division (SESD)
guidelines. A total of one representative soil sample (one grab and one composite pair) will be collected
from each of the three (3) areas on the site (Figure 3). An individual soil sample and a duplicate will be
collected from zero (0) to two (2) feet bgs and one (1) to two (2) feet bgs at each sample point with the
use of a pre -decontaminated hand auger. The hand auger will also be decontaminated between sampling
at each location. The individual samples will be placed immediately in 4 oz glass jars with zero headspace.
Each duplicate sample will be placed in re -sealable plastic bags and the bags will be sealed. The grab
sample aliquots placed in 4 oz jars will subsequently be placed on ice to prevent volatilization prior to
screening of the individual bags. Each duplicate sample placed in resealable plastic bags will be screened
using a photoionization detector (PID) or similar device for volatile organic vapors.
The ECS environmental professional will observe and document a description of the soil, document PID
readings, note the color and texture of the soil, and note if the soil exhibits staining or exudes
distinguishable odors.
The individual grab soil sample with the highest PID reading from each one to two -foot section will be
appropriately packaged in laboratory -supplied pre -preserved containers from its duplicate 4-oz jar and
submitted to a North Carolina certified laboratory to be analyzed for VOCs. The laboratory supplied
sample containers will contain preservative if appropriate, and the sample containers will be placed on
ice once collected to properly preserve the samples. Subsequently, each of the grab soil aliquots from
zero to two feet bgs will be gently mixed and one representative composite soil sample per area will be
submitted for analysis for SVOCs, total RCRA-8 metals, and Cr VI. Laboratory results of the soil samples
will be compared to the most current version (July 2023) of the NCDEQ Residential Preliminary Soil
Remediation Goals (PSRGs) and Industrial/Commercial PSRGs.
After the samples have been collected, the sampling points will be abandoned and back filled with soil
cuttings generated from the drilling process.
4.0 LABORATORY ANALYSIS
4.1 Soil Analytical
Following sample collection, the sample containers will be labeled, put on ice, and maintained under
chain -of -custody (COC) until delivered to a North Carolina certified laboratory. Eurofins Environmental
Testing, a North Carolina Certified Laboratory located in Savannah, Georgia will be used for this project.
3

Wright's Executive Sales 11
Durham, Durham County, North Carolina
Final Grade Sampling Workplan — Revision 1.0
Brownfields Project #24007-20-032
February 29, 2024
A Chain -of -Custody document will be utilized throughoutthe collection and transportation of the samples.
The soil samples collected 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. A summary of the proposed
samples and analysis is provided in Table 1.
The laboratory's Reporting Limits (RLs) and/or Method Detection Limits (MDLs) will be reported at or
below the Residential 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.
5.0 QA/QC
A duplicate composite and grab sample will be collected and submitted for analysis from one of the
sample areas.
6.0 INVESTIGATION DERIVED WASTE (IDW) MANAGEMENT
Limited investigation derived waste (IDW) is expected to be generated during the activities described in
this work plan. IDW generated (i.e., soil cuttings) during the sampling activities, the soil will be used to
backfill the borings and/or thinly spread in the vicinity of the borings.
7.0 REPORTING
Subsequent to receiving the final laboratory analytical report, ECS will prepare a report documenting the
field activities, sampling procedures, borings logs, field notes, laboratory analytical results, applicable
figures and tables, and conclusions for submission to the BRS. If unidentified and/or unexpected
conditions are encountered during the assessment, Geerhouse Owner, LLC will be notified. The final letter
report will include ECS' registered Geologist Firm number and bear the seal of the certifying North Carolina
Licensed Geologist or North Carolina Licensed Professional Engineer. The responsibility of notifying the
NCDEQ and other external parties lies solely with Geerhouse Owner, LLC and/or with ECS acting on their
behalf.
The NCDEQ Brownfields Redevelopment Section contact is:
Ms. Lauren Fleming
[e-mail]
NCDEQ DWM, NC Brownfields Redevelopment Section
M

FIGURES

TABLE

Wright's Executive Sales 11
Durham, Durham County, North Carolina
Final Grade Sampling Workplan — Revision 1.0
Brownfields Project #24007-20-032
February 29, 2024
TABLE OF CONTENTS
1.0 INTRODUCTION........................................................................................................................ 2
1.1 Project Information........................................................................................................2
1.2 Proposed Sampling.........................................................................................................2
2.0 SCOPE OF WORK....................................................................................................................... 2
2.1 Sample Collection...........................................................................................................2
2.2 Deviation from Approved Plan.......................................................................................2
3.0 SAMPLING METHODOLOGY............................................................................................................ 3
3.1 Sampling Methodology...................................................................................................3
4.0 LABORATORY ANALYSIS............................................................................................................ 3
4.1 Soil Analytical..................................................................................................................3
5.0 QA/QC......................................................................................................................................4
6.0 INVESTIGATION DERIVED WASTE (IDW) MANAGEMENT...........................................................4
7.0 REPORTING..............................................................................................................................4
FIGURES
Figure 1 - Site Topographic Location Map
Figure 2 — Brownfield Parcel Location Map
Figure 3 - Final Grade Sampling Map
TABLES
Table 1— Proposed Sample Locations & Analysis
1

Wright's Executive Sales 11
Durham, Durham County, North Carolina
Final Grade Sampling Workplan — Revision 1.0
Brownfields Project #24007-20-032
February 29, 2024
1.0 INTRODUCTION
1.1 Protect Information
The subject site is located in Durham, Durham County, North Carolina. The site is currently in the North
Carolina Brownfields Redevelopment Section (BRS) and is identified as Brownfields Project Number
24007-20-032. The subject site formerly consisted of five parcels that have later been consolidated into
two parcels identified as Durham County Parcel Identification Numbers (PINS) 0822903182 and
082199297413. The site consists of approximately 2.37 acres of land (Figures 1 and 2).
The objective of this work plan is to maintain the liability protections offered by the Brownfields Program
by characterizing surficial soil not covered by hardscape at the site after redevelopment.
1.2 Proposed Sampling
The patio redevelopment activities have been completed at the site. In accordance with the approved
Environmental Management Plan (EMP) for the site (revised and approved on June 7, 2022), this Work
Plan has been developed for the collection of surficial soil samples in portions of the site not covered by
hardscape.
The site green space has been divided into three (3) representative areas and five soil borings will be
advanced in each area to a depth of two feet below the ground surface (bgs) (Figure 3). One set of
representative final grade soil samples (grab and composite) will be collected from each area. This Work
Pplan for the final grade soil sampling will be required to be approved by the Brownfields Project Manager
prior to its implementation. The data collected during this assessment is intended for use only by
Brownfields and not by other NCDEQ programs.
2.0 SCOPE OF WORK
2.1 Sample Collection
Soil sampling will occur from the green space at the site which has been subdivided into three (3)
representative areas (Figure 3). The three representative areas include landscaped portions of the rooftop
patio area and the eastern and western portions of the landscaped community corridor. Five
representative soil borings will be advanced in each of the three (3) areas to a depth of two feet bgs. One
set of soil samples (composite and grab) will be collected from each of the three areas. Composite samples
will be collected from zero (0) to two (2) feet bgs. Grab samples will be collected from one (1) to two (2)
feet bgs. The soil samples will be submitted to a North Carolina Certified laboratory for analysis.
Representative composite soil samples will be submitted for laboratory analysis of semi -volatile organic
compounds (SVOCs), Resource Conservation and Recovery Act (RCRA) Metals, and hexavalent chromium
(Cr VI). Grab soil samples will be submitted for laboratory analysis of volatile organic compounds (VOCs).
2.2 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
N

Wright's Executive Sales 11
Durham, Durham County, North Carolina
Final Grade Sampling Workplan — Revision 1.0
Brownfields Project #24007-20-032
February 29, 2024
procedure, such may be accomplished with agreement between Geerhouse Owner, LLC representatives
and ECS after consultation with, and subject to approval by BRS. Such changes will comply with applicable
local, State and Federal rules and regulations. A written amendment shall be prepared and submitted to
BRS for approval prior to implementation. Amendments must have the approval of BRS prior to
implementation.
3.0 SAMPLING METHODOLOGY
3.1 Sampling Methodology
Soil sampling and analysis is to be conducted for VOCs by EPA Method 8260, SVOCs by EPA Method 8270,
RCRA metals by EPA Method 6020, and Cr VI by EPA Method 7199. The sampling activities will be
conducted in general accordance with the most recent Science and Ecosystem Support Division (SESD)
guidelines. A total of one representative soil sample (one grab and one composite pair) will be collected
from each of the three (3) areas on the site (Figure 3). An individual soil sample and a duplicate will be
collected from zero (0) to two (2) feet bgs and one (1) to two (2) feet bgs at each sample point with the
use of a pre -decontaminated hand auger. The hand auger will also be decontaminated between sampling
at each location. The individual samples will be placed immediately in 4 oz glass jars with zero headspace.
Each duplicate sample will be placed in re -sealable plastic bags and the bags will be sealed. The grab
sample aliquots placed in 4 oz jars will subsequently be placed on ice to prevent volatilization prior to
screening of the individual bags. Each duplicate sample placed in resealable plastic bags will be screened
using a photoionization detector (PID) or similar device for volatile organic vapors.
The ECS environmental professional will observe and document a description of the soil, document PID
readings, note the color and texture of the soil, and note if the soil exhibits staining or exudes
distinguishable odors.
The individual grab soil sample with the highest PID reading from each one to two -foot section will be
appropriately packaged in laboratory -supplied pre -preserved containers from its duplicate 4-oz jar and
submitted to a North Carolina certified laboratory to be analyzed for VOCs. The laboratory supplied
sample containers will contain preservative if appropriate, and the sample containers will be placed on
ice once collected to properly preserve the samples. Subsequently, each of the grab soil aliquots from
zero to two feet bgs will be gently mixed and one representative composite soil sample per area will be
submitted for analysis for SVOCs, total RCRA-8 metals, and Cr VI. Laboratory results of the soil samples
will be compared to the most current version (July 2023) of the NCDEQ Residential Preliminary Soil
Remediation Goals (PSRGs) and Industrial/Commercial PSRGs.
After the samples have been collected, the sampling points will be abandoned and back filled with soil
cuttings generated from the drilling process.
4.0 LABORATORY ANALYSIS
4.1 Soil Analytical
Following sample collection, the sample containers will be labeled, put on ice, and maintained under
chain -of -custody (COC) until delivered to a North Carolina certified laboratory. Eurofins Environmental
Testing, a North Carolina Certified Laboratory located in Savannah, Georgia will be used for this project.
3

Wright's Executive Sales 11
Durham, Durham County, North Carolina
Final Grade Sampling Workplan — Revision 1.0
Brownfields Project #24007-20-032
February 29, 2024
A Chain -of -Custody document will be utilized throughoutthe collection and transportation of the samples.
The soil samples collected 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. A summary of the proposed
samples and analysis is provided in Table 1.
The laboratory's Reporting Limits (RLs) and/or Method Detection Limits (MDLs) will be reported at or
below the Residential 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.
5.0 QA/QC
A duplicate composite and grab sample will be collected and submitted for analysis from one of the
sample areas.
6.0 INVESTIGATION DERIVED WASTE (IDW) MANAGEMENT
Limited investigation derived waste (IDW) is expected to be generated during the activities described in
this work plan. IDW generated (i.e., soil cuttings) during the sampling activities, the soil will be used to
backfill the borings and/or thinly spread in the vicinity of the borings.
7.0 REPORTING
Subsequent to receiving the final laboratory analytical report, ECS will prepare a report documenting the
field activities, sampling procedures, borings logs, field notes, laboratory analytical results, applicable
figures and tables, and conclusions for submission to the BRS. If unidentified and/or unexpected
conditions are encountered during the assessment, Geerhouse Owner, LLC will be notified. The final letter
report will include ECS' registered Geologist Firm number and bear the seal of the certifying North Carolina
Licensed Geologist or North Carolina Licensed Professional Engineer. The responsibility of notifying the
NCDEQ and other external parties lies solely with Geerhouse Owner, LLC and/or with ECS acting on their
behalf.
The NCDEQ Brownfields Redevelopment Section contact is:
Ms. Lauren Fleming
[e-mail]
NCDEQ DWM, NC Brownfields Redevelopment Section
M

FIGURES

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SOURCE: N FIGURE 1
USGS TOPOGRAPHIC MAP "Y E SITE TOPOGRAPHIC LOCATION MAP
7.5 — MINUTE SERIES
NORTHWEST DURHAM, NC (TOP) + Wright's Executive Sales II
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' ECS Project Number: 49-10039-B

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ECS Southeast, LLP
Phase I ESA, December 6, 2019
APPROXIMATE SCALE:
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FIGURE 2
BROWNFIELD PARCEL LOCATION MAP
Wright's Executive Sales II
Brownfields Project Number 24007-20-032
721 & 723 Rigsbee Ave; 620 & 616 Foster St.
Durham, Durham County, North Carolina
TM ECS Project Number: 49-10039-B

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SOURCE: wg FINAL GRADE SAMPLING MAP
ECS Southeast, LLP
Phase I ESA, December 6, 2019 Wright's Executive Sales II
Building Plans EN Brownfields Project Number 24007-20-032
721 & 723 Rigsbee Ave; 620 & 616 Foster St.
APPROXIMATE SCALE: Durham, Durham County, North Carolina
M
100 FT. ECS Project Number: 49-10039-B
f1

TABLE

TABLE 1 - PROPOSED SAMPLE LOCATIONS & ANALYSIS
WRIGHT'S EXECUTIVE SALES II
ECS PROJECT NO. 49-10039-B
BROWNFIELDS PROJECT NO.: 24007-20-032
Sample Media
Laboratory Analysis & Analytical Method
VOCs
SVOCs
RCRA Metals
Cr VI
Soil Samples
Area 1 (Composite)
NS
8270
6020
7199
Area 1 (Grab)
8260
NS
NS
NS
Area 2 (Composite)
NS
8270
6020
7199
Area 2 (Grab)
8260
NS
NS
NS
Area 3 (Composite)
NS
8270
6020
7199
Area 3 (Grab)
8260
AIQ
NS
nic
Dup - 1 (Composite)
NS
8270
6020
7199
Dup - 1 (Grab)
8260
NS
NS
Notes:
VOCs = Volatile Organic Compounds
SVOCs = Semi -Volatile Organic Compounds
RCRA = Resource Conservation & Recovery Act
Cr VI = Hexavalent Chromium
NS = Not Sampled for this analysis