25065_Crocker & Son_Assessment WP w approval_20220821

Graham, Stephanie J
From: Graham, Stephanie J
Sent: Wednesday, August 31, 2022 3:28 PM
To: Daly, Kristen
Cc: Hayden, Paul; [e-mail]; Eckard, Sharon
Subject: Crocker & Son Work Plan (BF Property # 25065-221-092) - Approved
Hi Kristen —The Revised Work Plan for Brownfields Data Gap Assessment Rev. 4 (GTA Associates, Inc., April 6, 2022
revised August 31, 2022) is approved.
Please keep us apprised of the schedule and let me know if you have any questions.
Thanks,
Stephanie
Stephanie Graham
Brownfields Project Manager
Division of Waste Management — Brownfields Program
NC Department of Environmental Quality
Office: 704-235-2195
Mobile: [phone]
610 East Center Avenue, Suite 301
Mooresville, NC 28115
DEQ
Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties.
1

PRELIMINARY NCDEQ BROWNFIELDS PROGRAM GUIDANCE
Vapor Intrusion Assessment Work Plan & Report Checklist
NCDEQ Brownfields Program
July 2021
This guidance is to be used for Brownfields Properties to evaluate vapor intrusion concerns.
Vapor intrusion (VI) assessment work plans and reports for NC Brownfields properties must use
this checklist. The completed checklist must be provided with each of the submitted work plan
and subsequent report documents and confirm the following:
• The type of information detailed below has been included; and
• The format and tables provided below were used to complete the work plan.
The benefits of following this checklist include:
• Consistency and predictability in the assessment process;
• The most efficient process for preparing and reviewing work plans and reports
prepared for Brownfields properties;
• Maximize usability of the data by the NC Brownfields Program;
• Minimize DEQ review time; and
• Reduce costs and delays associated with additional mobilizations.
Assessment that is conducted without approval from the NC Brownfields Program is done at
your own risk and may not be accepted by the Brownfields Program. The Program will be using
this checklist to conduct its reviews.
The VI assessment work plan and report must be signed and sealed by a NC licensed geologist or
engineer.
Plan to allow sufficient review time for Work Plans and Reports. The Program is in high
demand and your Brownfields Project Manager is managing multiple projects. The DEQ
Brownfields Program has a vested interest in keeping all of our projects on schedule, including
yours. To help, you should maintain close coordination and consultation with your Brownfields
Project Manager (whether it's with the Brownfields agreement development staff or with the
Property Management Unit staff afterwards) to determine an approximate time range for review
and allow for that in planning your project schedule. The Prospective Developer, their technical,
and legal team shall coordinate to ensure the validity of collected data which forms the basis for
environmental risk decision making regarding vapor intrusion potential and mitigation measures
at the Brownfields Property.
Note: Work plans that follow this checklist outline can be submitted either as a standalone
document or as part of a work plan that encompasses other assessment activities (i.e. soil,
groundwater, etc.) required by the Brownfields Program.
VIMS Assessment Checklist Version 1, July 2021

Title Page
The title page should include the following information.
❑■ Title of work plan or report
0 Brownfields Project Name (not the development name)
❑■ Brownfields Project Number
0 Date (updated with each revision)
❑■ Revision Number
0 Firm PE/PG License Number
❑■ Individual PE/PG seal & signature
❑■ Contact information for Developer, Consultant, and Project Manager (or BPMU Staff)
Section 1— Introduction
Provide a BRIEF summary of the history of the property that contains the following:
❑■ History in the Brownfields Program or involvement by another DEQ Section such as
DSCA
❑■ Provide a chronology of former and/or current uses
0 List potential sources of vapor intrusion (e.g. off -site migration of contaminants, on -site
releases, chlorinated solvent use, especially the presence or suspected presence of
trichloroethylene (TCE), groundwater contamination, and preferential pathways such as
utility corridors
0 List RECs from a Phase I ESA and their location on the Brownfields Property
❑■ Provide a conceptual site model for the Brownfields Property on which to base the data
gap evaluation
❑■ Indicate if the scope of work was negotiated during a Brownfields Data Gap Meeting, etc.
Provide a summary of the redevelopment plans for the Brownfields Property that contains the
following:
0 Type of proposed use (townhomes, apartments, mixed -use, retail, etc.)
❑■ Demolition, new construction and foundation type
9 Re -use of existing structures
❑■ Presence of elevators & stairwells
IN How the new building configuration/parking areas relate to the location, if known, of
contamination at the Brownfields Property
IN Proposed and existing building/unit square footage to be assessed.
❑■ Indicate that the proposed use has been approved or is under evaluation by the
Brownfields Program at the time of submittal.
❑■ Include a discussion of the following and reference each appendix or attachment where
located:
❑■ Figure 1 - Site location map on USGS topographic map, north arrow,
graphic scale, site outline
❑■ Figure 2 — see format requirements in Section 8 below - Site redevelopment
plans superimposed on a high -quality aerial photograph of the site
VIMS Assessment Checklist Version 1, July 2021

B Table 1 — see example Tables in Section 8 below: With property identifying
information in a summary table format: Brownfield Project Number, Parcel
Number(s), address, site acreage, former or current use, & proposed use
Section 2 — Scope of Work
N Provide a general description of proposed scope of work covered in this plan (e.g., 5
soil gas sampling points, 6 sub -slab points, 4 indoor air, 1 ambient air); Note for any
Brownfields Property, baseline data for each applicable environmental medium as
determined by DEQ is required.
N Discuss samples to be collected by media and source area/location. Generally, the
reasoning for the sample locations selected.
N Include a discussion of the following and reference each appendix or attachment
where located:
❑■ Table 2 — see example Tables in Section 8 below - Briefly list and describe
the vapor intrusion data gaps the assessment is attempting to fill and note other
pertinent information in a sampling summary, including background and
QA/QC samples.
❑■ Figure 3 — see format requirements in Section 8 below - Proposed Sample
Location Map - Provide a figure in the work plan noting the location of each of
the proposed soil gas, sub -slab, or indoor air samples overlain with planned
building layouts, historical areas of concern, and previously identified impacts.
Note that DEQ DWM VI Guidance states that "Due to spatial variability in sub -slab soil gas
concentrations over a slab, DWM generally recommends the collection of one sample per 1,000
square feet of first floor building area." Sampling density could vary due to site -specific
considerations, and with prior approval from DEQ.
Section 3 — Sampling Methodolou
For all air sampling planned, provide the following information in relevant section 3.a or 3.b
discussed below:
N Reference the most current versions of DEQ DWM and ITRC guidance documents
applicable to vapor intrusion sampling, and any other applicable standard operating
procedures. Note any deviations or methodology planned that is not covered by such
guidance.
N Discuss timing of sampling and whether indoor air and sub -slab sampling will be
occurring contemporaneously; if so plan to conduct indoor air sampling first so that the
creation of the sub -slab point does not influence the indoor air data.
❑■ State the analytes for which each sample will be analyzed for (briefly) and include the
analytes that are specifically being requested for reporting. Reference Table 2.
0 Indicate if mercury has previously been assessed for/detected in soil or groundwater
and whether mercury vapor intrusion concerns are present.
* Discuss how and when vacuum readings will be collected (for Summa canisters) —
field vacuum readings should be recorded on the chain of custody forms for ease in
comparing to reported laboratory receipt vacuum readings.
VIMS Assessment Checklist Version 1, July 2021

Note: Per DEQ DWM VI Guidance, Summa canisters that have lost greater than 10% of the
initial recorded lab vacuum when received in the field will not be used for sampling. It is
assumed that Summa canisters are issued with a maximum achievable pressure of 30" Hg. If
canisters are received in the field with less than 27" Hg, initial lab pressure measurements should
be documented to confirm less than a 10% volume loss or a replacement summa canister
obtained. Otherwise, sample results may be rejected.
0 Provide the sample collection time duration for all samples.
❑■ State how duplicate sample(s) will be collected.
0 Indicate a targeted final vacuum reading of at least -5" Hg. Note if the vacuum
measurement is less than this, sample acceptance will be in jeopardy and DEQ
Brownfields may request a resample.
0 Include planned flow rate for Summa canister sampling or time allotting for passive
samplers.
Note: Per DEQ DWM VI Guidance, the maximum allowable flow rate is 200 mL/min.
Section 3.a. Exterior Soil gas / Sub -Slab Sampling
0 Describe depths of samples to be collected (Reference example Table 2 in Section 8
below) or how that decision will be made in the field, if needed. Refer to DEQ DWM
Vapor Intrusion Guidance for reference to minimum depths of samples.
❑■ Locate sub -slab samples in areas of the slab that are near known or potential sources of
volatile contaminants and in areas that could encourage vapor migration, such as sub -
grade trenches, pits, and elevator shafts, but position them at least 5 feet from exterior
walls or cracks/penetrations.
❑■ Locate sub -slab samples across the building(s) being assessed being mindful of any
building features that could indicate the presence of sub -walls or footers that would
restrict sub -slab vapor flow.
0 Describe installation methodology construction details of the sub -slab and/or soil
vapor samples, including filter pack and sealants. Use of new and dedicated tubing is
required.
0 Discuss sample collection procedures. Include the following, at a minimum:
❑■ Equipment to be used (Summa canisters & size, type of tubing, vapor pins,
etc.)
0 Indicate if sub-slab/exterior soil gas sample points will be permanent or
temporary.
0 Whether Summa canisters are batch- or individually -certified.
❑■ Discuss stabilization time of the sampling points prior to sampling.
Note: Inadequate stabilization times have been known to impact sample results through the
inadvertent collection of vapors off -gassing from soil gas/sub slab installation materials,
potentially creating false positive results that would then require a resampling event.
Recommended stabilization times are outlined below:
VIMS Assessment Checklist Version 1, July 2021

a. Sub -slab with minimally invasive points (e.g. Vapor Pins): Manufacturer's
guidelines generally suggest 20 minutes may be sufficient with an airtight cap
installed;
b. Sub -slab points (other than minimally invasive points): at least 24-48 hours
(to be purged at installation and at time of sampling with an air -tight cap in
place in the interim); or
c. Exterior soil gas points: 48 hours to allow materials used during installation
to off -gas prior to sampling (to be purged at installation and at time of sampling
with an air -tight cap in place in the interim).
0 Describe purging methods and volumes — must take into account not only the volume
of the tubing but also of the annulus. Stagnant air inside soil gas probes and sampling
trains must be purged prior to sample collection. Three to four system purge volumes are
recommended as a minimum value. The investigator should use a low purge rate with a
maximum of 200 mL/min.
❑■ Describe leak check procedures for sub -slab and soil gas samples. Note: helium check
of entire sample train is required; a shut-in test is also recommended as a best
management practice.
0 Describe how the helium meter will be connected to the sampling train. Note that
directly connecting the helium meter to the sampling train without a backflow preventer
is not allowed.
❑■ Record the type of material found under the slab or in the soil gas borings.
0 Record slab thickness for sub -slab samples and provide soil boring logs for soil gas
samples.
0 Discuss sample point abandonment and/or securement (if permanent points)
Note: Exterior soil -gas sampling may not necessarily be indicative of site conditions following
redevelopment efforts and confirmation sub -slab sampling may be necessary following
construction to confirm that a potential vapor intrusion pathway is not present.
Section 3.b. Indoor Air / Crawl Space Sampling
❑ Include a chemical survey of any potential interference compounds stored or used
inside the building (Refer to example Indoor Air Building Survey and Sampling Form
that will be completed for each distinct area of the Brownfields Property under
assessment. The Indoor Air Form is included within the DEQ DWM VI Guidance).
❑ Describe steps to remove any potential interference compounds from the sampling
area sufficiently ahead of the sampling event (The DEQ DWM VI Guidance recommends
removal within 24-72 hours and typically within 48 hours of sampling as indicated on the
Indoor Air Building Survey and Sampling Form).
❑ Schedule sampling to minimize any potential for interference from compounds used
during construction or finishing of new buildings, etc. Describe any sampling
constraints.
❑ Describe building conditions (including HVAC conditions) that will exist within 24
hours prior to and during the sampling.
❑ Discuss sample collection procedures. Include the following, at a minimum:
VIMS Assessment Checklist Version 1, July 2021

❑ Equipment to be used (passive samplers, Summa canisters & size, etc.)
❑ Placement height of Summa canisters or passive samplers for indoor air and
ambient air collection to account for site specific breathing zone height of
anticipated occupants.
❑ Description of the indoor air summa canisters or passive samplers proposed
placement location including use of space (e.g., ground floor garage, first floor
living space, office, mechanical equipment room, etc.).
❑ Methods implemented to reduce or eliminate access to building where indoor
air sampling is occurring
❑ Whether Summa canisters are batch- or individually -certified. Note: per
DEQ DWM VI Guidance, indoor air samples should utilize individually
certified Summa canisters
❑ Provide how often and when exterior ambient air samples will be collected (typically,
one sample per day per sampling event)
❑ If crawl space samples are proposed, include details on:
❑ Presence of moisture/VI barrier
❑ Ceiling structure of crawlspace
❑ Exterior openings or ventilation features
❑ Height across entire footprint of crawl space
❑ Walls/vertical structures separating crawl space areas
❑ Additional pertinent details of crawl space construction
Section 4 — Laboratory Analyses
❑■ Include the proposed analyte list and EPA Method numbers prepared in consultation
with your DEQ Brownfields Project Manager;
0 Minimum analytical requirements are described as outlined below:
a. Full TO-15 list is required initially for soil gas, sub -slab, and indoor air analyses.
b. Subsequent modifications of the analyte list, e.g., once sub -slab gas results are
known, may be made with advance approval from your Brownfields Project
Manager.
Note: Not all laboratories use the same standard analyte list. Ensure that naphthalene is
included. but exclude acrolein unless it is a suspected site contaminant. Because of the
extremely limited analyte list for the TO-15 SIM method, discuss its use with your DEQ
Brownfields Project Manager prior to implementation. When approved for use, this method
should be used for both sub -slab and indoor air samples for comparison purposes.
0 Discuss any proposed limitations on the contaminants of concern, if any, and the
reason for such. limitation (sufficient previous data, indoor air interferences, etc.).
0 Discuss laboratory certifications. Please note, NC does not certify laboratories for air
samples. Please specify what certification the proposed air laboratory holds.
0 Indicate the Reporting Limits/Method Detection Limits will meet applicable screening
criteria (to the extent feasible). Include reporting of J-flags to meet criteria.
VIMS Assessment Checklist Version 1, July 2021

❑ Indicate what Level QA/QC will be reported by the laboratory. Level II QA/QC is
typically acceptable.
Section 5 — QA/QC
0 Specify the duplicate sample frequency. Minimum requirement: 1 duplicate per 20
samples, per media, per method, per day of sampling.
FE Discuss chain of custody and shipping.
Section 6 — Investigation Derived Waste (IDW) Management
FE 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 Brownfields Property has not previously been
assessed, 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 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 implementation of the work plan. At a minimum, the report shall include:
❑ 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 outlined below with the addition of:
❑ Tables for tabulated analytical data per media sampled and analyzed, compared against
applicable screening levels; any non -detectable levels should be reported as less than the
applicable reporting limit noting any reporting limits that exceed the respective screening
level.
❑ Figure(s) depicting actual sample locations, with the results for each media depicted,
graphic scale and north arrow. Modify the figures as appropriate in the report if there was
variance with these locations during the sampling event;
❑ Detail on building additions, slab types and sub -grade features such as the locations of
crawl spaces, tunnels, basements, sub -grade walls, and footer walls encountered during
assessment.
❑ Firm PE/PG License Number; and
❑ Individual PE/PG seal & signature
VIMS Assessment Checklist Version 1, July 2021

Section 8 — Example Tables and Format for Figures
❑ Table 1 — Property Summary
Table 1: Property Summary
BF Project No.
Parcel
No.
Address
Site
Acreage
Former/
r nt
Current
e
REC
Proposed
Use
❑ Table 2 — Sampling Summary
Table 2: Sampling Summar
Data
Parcel/Bldg
Sampling
Type
Number
Depth
Analytical
Detection
range for
Gap
No.
Objective
of
Sample
of
Samples
of
Samples
Program
TCE (if
applicable)
❑ Figure 1— Site Location Map (topographic map base) with north arrow, graphic scale, and
site outline.
❑ Figure 2 — Proposed Redevelopment to include the following details:
❑ All current and proposed structures
❑ Brownfields Property Boundary
❑ Which structures will be removed/renovated
❑ Proposed future use of each building
❑ Figure 3 - Proposed Sample Location Map (work plan) or Sample Location Map to include
the following details:
❑ High quality aerial and/or floor plan base (interior samples)
❑ Overlain planned or existing (to remain) building layout
❑ North arrow
❑ Graphic scale
❑ Historical sample locations (if applicable)
❑ RECs or other areas of concern
❑ Proposed sample locations for each medium proposed for sampling
❑ Sample identification labels
❑ Appendix — Tabular Summary of Historical Analytical Data
VIMS Assessment Checklist Version 1, July 2021

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REVISED WORK PLAN FOR BROWNFIELDS DATA GAP
ASSESSMENT REV. 4
CROCKER & SON
613/615 West Morgan Street and 117 South Boylan Avenue
Raleigh, North Carolina
NCBP No. 25065-221-092
April 6, 2022 revised August 31, 2022
Prepared for:
Stephanie Graham
Brownfields Project Manager
Division of Waste Management — Brownfields Program
NC Department of Environmental Quality
610 East Center Avenue, Suite 301
Mooresville, North Carolina 28115
Prepared by:
Kristen Daly
Associate
Kevin Howell, PG 2199
Senior Environmental Scientist
GTA Associates, Inc.
Geotechnical and Environmental Consultants
5605 Chapel Hill Road, Suite 112
Raleigh, North Carolina 27607
[phone]
www.gtaeng.com
GTA Project No. 31172516xl

GTA ASSOCIATES, INC.
GEOTECHNICAL AND
ENVIRONMENTAL CONSULTANTS
A Practicing GBA Member Firm
August 31, 2022
Division of Waste Management — Brownfields Program
NC Department of Environmental Quality
610 East Center Avenue, Suite 301
Mooresville, North Carolina 28115
Attn: Ms. Stephanie Graham
Re: Revised Work Plan for Brownfields Data Gap Assessment
Crocker & Son
613/615 West Morgan Street and 117 South Boylan Avenue
Raleigh, North Carolina
NCBP No. 25065-221-092
Dear Ms. Graham:
A
g ^
In accordance with your correspondence dated May 2, 2022, GTA Associates, Inc. (GTA)
has revised the Proposed Work Plan for Brownfields Data Gap Assessment, dated April 6, 2022,
of the planned development at the above -referenced site ("subject property" or "Site"). This work
plan was prepared as requested by the North Carolina Department of Environmental Quality
(NCDEQ), as discussed in a meeting held on February 18, 2022. Additional comments were
provided to GTA by NCDEQ on May 2, 2022.
This work plan incorporates the requested revisions. Should you have any questions
regarding this report, or should you require additional information, please contact our office at
[phone].
Sincerely,
GTA ASSOCIATES, INC.
Kristen Daly
Associate
Ke in Howell, P.G.
Senior Environmental Scientist
KBD/PHH/ps
35172516x1
\\10.10.34.19\gta data\Environmental\Projects\2022\35172516X1 - T3 Block 83\VCP\35172516xl T3 BF Work Plan Rev.docx
5605 Chapel Hill Road, Suite 112, Raleigh, NC 27607 [phone]
t Abingdon, MD ♦ Baltimore, MD t Laurel, MD t Frederick, MD ♦ Waldorf, MD t New Castle, DE t Georgetown, DE
♦ Somerset NJ ♦ NYC Metro ♦ Pittsburgh Metro ♦ Quakertown, PA ♦ Scranton/Wilkes-Barre, PA ♦ York, PA
t Northeastern, OH ♦ Sterling, VA ♦ Nashville, TN ♦ Charlotte, NC t Raleigh, NC t Orlando, FL
Visit us on the web at www.gtaeng.com

TABLE OF CONTENTS
1.0 INTRODUCTION............................................................................................................... 1
2.0
SCOPE OF WORK............................................................................................................. 3
2.1
Receptor Survey................................................................................................................
3
2.2
Utility Clearance................................................................................................................
4
2.3
Geophysical Survey...........................................................................................................
4
2.4
UST Removal....................................................................................................................
5
2.5
Sampling............................................................................................................................5
2.5.1
Soil..............................................................................................................................
5
2.5.2
Groundwater...............................................................................................................
6
2.5.3
Soil Vapor...................................................................................................................
6
3.0
SAMPLING METHODOLOGY.......................................................................................
7
3.1
Soil Sampling....................................................................................................................
7
3.2
Groundwater Sampling......................................................................................................
8
3.3
Soil Vapor Sampling.........................................................................................................
9
4.0
LABORATORY ANALYSIS...........................................................................................11
5.0 QA/QC...............................................................................................................................12
6.0 INVESTIGATION DERIVED WASTE.........................................................................13
7.0 REPORTING .......
LIST OF FIGURES
Figure 1
Site Location Map (color)
Figure 2
Proposed Development Plan (color)
Figure 3
Historical Sampling Locations (color)
Figure 4
Proposed Cut/Fill Areas (color)
Figure 5
Proposed Sampling Locations (color)
LIST OF TABLES
Table 1 — Brownfield Sampling Matrix
ATTACHMENTS
Brownfields Property Receptor Survey
I
.....13

REVISED WORK PLAN FOR BROWNFIELDS DATA GAP
ASSESSMENT REV. 4
613/615 WEST MORGAN STREET AND 117 SOUTH BOYLAN AVENUE
RALEIGH, NORTH CAROLINA
AUGUST 31, 2022
1.0 INTRODUCTION
1.1 Site Description
The Site is located south of West Morgan Street, east of South Boylan Avenue, and north of West
Hargett Street, within the city limits of Raleigh, Wake County, North Carolina. The Site is
comprised of two parcels of land encompassing approximately 0.85 acres, currently occupied by
two commercial structures containing a vacant restaurant building (615 West Morgan Street), a
yoga studio (613 West Morgan Street Suite B), and a framing workshop (613 West Morgan Street
Suite A), and a vacant, partially wooded parcel located at 117 South Boylan Avenue. The current
buildings were constructed in 1956 and 1964, prior to which the property was occupied by
residential dwellings. The Site and surrounding vicinity are serviced by municipal water and sewer.
An 18-story office building with a caisson and grade -beam foundation and an elevator bank is
proposed to be constructed on the Site. It is GTA's understanding that the building will be
connected to municipal water and sewer systems. The square footage is not currently available,
and the proposed commercial land use has not officially been approved by North Carolina
Department of Environmental Quality (NCDEQ) to date, but no objections have yet been raised in
the review process.
1.2 Site History
Site Parcels
GTA completed a Phase I ESA in February 2018 on the southern portion of the Site (117 South
Boylan Avenue), which historically contained one residence since at least 1909 until it was razed
between 1998 and 2002. This portion of the Site has remained vacant up until present day and is
currently wooded land.

NCDEQ 25065-221-092 Boylan and Morgan
August 31, 2022 GTA Project No. 35172516x1
NOVA completed a Phase I ESA dated March 17, 2020 of the northern portion of the 615 West
Morgan Street parcel, adjacently north of the South Boylan parcel. Historically, the easternmost
building on the northern portion of the property was used as a lawn mower and small engine repair
shop (Crocker and Son building, 613 West Morgan) since 1956. The current eastern restaurant
building (615 West Morgan) was used as a typewriter repair and sales shop. More recently, the
buildings have been used as a restaurant, a yoga studio, and a portrait framing facility. The report
identified several recognized environmental conditions (RECs): two heating oil underground
storage tanks (USTs) located north of the eastern building (613 West Morgan), the use of the
property as a small engine repair facility, and the documented presence of petroleum impacts
remaining at the Taylors Capital Sunoco site located upgradient to the north of the Site.
NOVA conducted a Phase II ESA on April 16, 2020 in which five soil borings and five temporary
groundwater monitoring points were installed on the South Boylan and West Morgan parcels.
Benzene was detected in a soil sample at the western portion of the subject property at levels above
the NCDEQ maximum soil contamination concentrations (MSCCs). Several analytes including
hexavalent chromium, total chromium, arsenic, and lead were detected in soil samples above soil -
to -water MSCCs on the northern portion of the subject property. Mercury was reported in soil, but
below the MSCCs and NCDEQ Preliminary Soil Remediation Goals (PSRGs). Groundwater
sampling results indicated volatile organic compound (VOC) levels below the NCDEQ 15A
NCAC 02L .0202 groundwater standards (2L standards). NOVA recommended "additional
assessment to delineate the impacts that exceed NCDEQ regulatory thresholds."
Based on the existing data for the Site, most soil and groundwater impacts have been identified in
the northern portion of the Site, below the footprint of the proposed building and near the perimeter
of the Site. The low concentrations of mercury detected in soil to date do not suggest a mercury
vapor concern at the Site.
Adjacent Parcel
GTA completed a Phase I ESA in January 2016 on the parcel adjacent to the southeast of the Site.
Historically, that parcel (610 and 612 West Hargett Street) contained two residences and an
2

NCDEQ 25065-221-092 Boylan and Morgan
August 31, 2022 GTA Project No. 35172516x1
outbuilding until a warehouse was constructed in the late 1930s, a portion of which was located
on the northern portion of the parcel. GTA conducted a Phase II ESA in June of 2016 in which
four soil borings and one temporary groundwater monitoring well were installed on the eastern
portion of that parcel. Soil borings encountered silty material with some clays and sands to a depth
of approximately 15 to 25 feet below ground surface (bgs), underlain by silty materials with some
sands. The Phase II ESA concluded that soil and groundwater impacts had been identified, and
recommended that the impacts be addressed during redevelopment. This parcel will be occupied
by the parking garage associated with the subject property building and is also currently enrolled
in the Brownfields program under site number 19078-15-092.
1.3 NCDEQ Involvement
On August 20, 2021, the Client submitted an application to the North Carolina Brownfields
Program for a brownfields agreement to manage risks associated with these historical uses and
impacts on the South Boylan and West Morgan parcels (Site). On December 22, 2021, NCDEQ
determined that the property was eligible to receive a brownfields agreement. On February 18,
2022, the Client and NCDEQ conducted an on -site data gap/kickoff meeting, at which NCDEQ
requested certain additional assessment activities be completed, and GTA submitted a work plan
dated April 6, 2022 to address those items. NCDEQ provided additional comments on May 2,
2022. GTA proposes to conduct the revised activities described in the following sections to
evaluate the data gaps at the subject property and satisfy the Brownfields program requirements
and verify the proposed property use is acceptable to the Brownfields program.
2.0 SCOPE OF WORK
2.1 Receptor Survey
GTA will perform an NCDEQ Brownfields Property Receptor Survey, which will identify
potentially sensitive property uses (schools, day care centers, hospitals, etc.) in the immediate
vicinity of the subject property, and identify municipal and private water supply wells within one-
half mile of the subject property utilizing a database search and windshield survey of the area.
GTA will also identify surface water bodies within one-half mile of the subject property and will
estimate the locations and depths of subsurface utilities in the vicinity of the subject property. GTA
3

NCDEQ 25065-221-092 Boylan and Morgan
August 31, 2022 GTA Project No. 35172516x1
will complete the NCDEQ Brownfields Property Receptor Survey Form (attached) upon
completion of the receptor survey.
2.2 Utility Clearance
GTA proposes to perform direct -push soil borings to collect soil, groundwater, and soil vapor
samples to evaluate the surface and subsurface conditions on the subject property. GTA anticipates
removing USTs north of the 613 West Morgan building and installing soil borings in the locations
described in Sections 2.4 and 2.5, as access allows. Prior to performing intrusive activities, GTA
will notify NC 811 in an attempt to identify underground utilities. A private utility locator will be
utilized to better identify utilities. It is the responsibility of the property owner to identify any
other utilities not marked by NC 811 or the private utility locator. GTA is not responsible for
damage to any subsurface features not identified by NC 811, the private utility locator, or the
property owner.
2.3 Geophysical Survey
Because the Site contains two former heating oil USTs north of the 613 West Morgan (eastern)
building, both of which were reportedly disconnected and filled with water, GTA proposes to
perform a geophysical survey in the reported location of the USTs to determine the exact location
and dimensions.
The geophysical method used may include magnetics, electromagnetics (EM), and/or ground
penetrating radar (GPR) depending on site conditions. It is presumed that the geophysical survey
can be completed in one day.
Geophysical survey findings are subject to the completeness and accuracy of information provided
by others, limitations of the geophysical survey methods, and limitations due to site conditions, or
a combination thereof. Limitations of the geophysical survey methods may include, but are not
limited to, spacing of survey lines, data collected, assumptions, and ambiguities of interpretation.
Limitations due to site conditions may include, but are not limited to, soil type and conductivity,
utilities, power lines, dense vegetation, buildings, metal fences, vehicles, reinforced concrete,
A9

NCDEQ 25065-221-092 Boylan and Morgan
August 31, 2022 GTA Project No. 35172516x1
metal debris, and other obstructions or interference. The size, type (e.g., metal or fiberglass), and
depth of the objects also affect detectability. Given these limitations, it is possible that
underground tanks or other buried objects may exist on the property and are not apparent during
the geophysical survey activities performed for this project.
2.4 UST Removal
The USTs will not be removed as part of this work plan; removal of the existing USTs will be
managed during construction after completion of the work described in this Work Plan as a
separate scope. The UST removal, including associated soil sampling, will take place as part of
site redevelopment activities and will be covered by the Brownfields agreement rather than a
closure obtained separately through the UST program.
2.5 Sampling
Based on the identified RECs, data gaps, and NCDEQ requests, GTA proposes:
• Six soil borings
• Three temporary groundwater sampling locations
• Ten soil vapor sampling points (six sub -slab and four exterior soil gas)
Sampling efforts will focus on areas of historical usage with potential for impacts and areas of the
Site that have not been adequately evaluated previously. Sampling depths will account for planned
cut depths to ensure adequate sampling of soil in the depth of disturbance. Cut and fill depths are
shown on Figure 4.
2.5.1 Soil
Based on the suspected USTs at 613 West Morgan (GTA-1 and -2), historical use of the Crocker
and Son parcel at 613 West Morgan Street (GTA-3), soil and groundwater impacts identified on
the adjacent parcel (GTA-4 and -5), and lack of data on the vacant 117 South Boylan Avenue
parcel (GTA-6), GTA proposed one day of soil borings as summarized below and in the attached
Table 1. Upon review of the initial work plan, NCDEQ requested composite soil sampling in the
location of the former residence for lead paint residue (GTA-6) wooded portion of the 615 West
5

NCDEQ 25065-221-092 Boylan and Morgan
August 31, 2022 GTA Project No. 35172516x1
Morgan property, which could also serve to evaluate the location of the former residence for lead
paint residue (GTA-6).
Boring ID
Depth
Rationale
GTA-1
Adjacent to suspect UST at 613 W. Morgan
GTA-2
Highest PID reading or just
GTA-3
South of former engine repair facility
above groundwater table
Crocker and Son at 613 W. Morgan
GTA-4
West portion of 613/615 W. Morgan parcel
GTA-5
GTA-6
0-1' (4-point composite)
117 S. Boylan former residential use/roof
runoff
GTA-7
Highest PID reading or 0-2'
Wooded portion of 615 W. Morgan
One duplicate sample will be collected from either the soil sample with the highest photoionization
detector (PID) field screening value, or in the absence of PID detections, from location GTA-4.
2.5.2 Groundwater
GTA proposes to collect groundwater samples from three temporary monitoring well locations in
the historically commercial portion of the property as summarized below and listed in Table 1.
Boring ID
Rationale
GTA-1
Adjacent to suspect UST at 613 W. Morgan
GTA-3
South of former engine repair facility (Crocker and Son) at 613 W. Morgan
GTA-5
West portion of 613/615 W. Morgan parcel
One duplicate sample will be collected from GTA-3, and a trip blank included.
2.5.3 Soil Vapor
To evaluate potential VOC and naphthalene impacts to proposed future development, GTA
proposes to collect sub -slab soil vapor samples from the existing buildings in areas of overlap with
proposed new building footprint, and exterior soil gas samples from the locations of the two
proposed elevator shafts. NCDEQ requested additional samples within each building, and an
0

NCDEQ 25065-221-092 Boylan and Morgan
August 31, 2022 GTA Project No. 35172516x1
additional sample in the wooded portion of the Site, as summarized below and listed in Table 1.
Boring ID
Rationale
Depth
Analysis
GTA-SV-1
Former restaurant building at 615 W.
Morgan Street
Sub -slab
VOCs plus naphthalene
GTA-SV-2
GTA-SV-3
613 W. Morgan
Street building
Northern portion
GTA-SV-4
GTA-SV-5
Central portion
GTA-SV-6
Southern portion
GTA-SV-7
Within parking lot at proposed elevator
shaft location — proposed —3-foot cut to
current grade
5 feet below
current grade
GTA-SV-8
GTA-SV-9
GTA-SV-10
Wooded portion of 615 W. Morgan
Street — proposed —3-4 feet fill above
current grade
One duplicate sample will be collected from GTA-SV-3.
3.0 SAMPLING METHODOLOGY
3.1 Soil Sampling
Soil sampling methodology will conform with the NCDEQ Inactive Hazardous Sites Branch
(IHSB) Guidelines for Assessment and Cleanup of Contaminated Sites dated July 2021, which
includes guidance for soil remediation goals, naturally occurring background levels, sampling
techniques, and quality assurance. Residential Preliminary Soil Remediation Goals (PSRGs)
updated June 2021 will be used for comparison with the laboratory results.
Borings will be extended to depths up to approximately 25 feet proposed grade, five feet into the
water table, or equipment refusal, whichever occurs first. Figure 4 shows the cut -fill "heat map"
for the project. The Geoprobe® utilizes a DT22 Dual -Tube Sampling System® that consists of a
stainless -steel outer casing rod string and an inner rod string. The sampling system is generally
advanced in five-foot increments as the outer rod string provides a continuous sealed hole and the
smaller inner rod string holds a disposable plastic sample liner in place against a stainless -steel
cutting shoe. As the dual -tube sampler is advanced through the soil profile, a continuous soil
sample is collected in a disposable plastic liner that is extracted though the outer casing rods once
7

NCDEQ 25065-221-092 Boylan and Morgan
August 31, 2022 GTA Project No. 35172516x1
the sampling system is driven to the desired depth. During advancement of the borings, continuous
soil cores will be collected and field screened using a PID, which is capable of detecting volatile
organic vapors, such as those typically associated with petroleum and some solvents. A portion
of each soil core will be placed in sealed plastic bags for field screening.
Samples will be collected from the bottom of the boring, just above the soil/groundwater interface,
or the depth with the highest PID screening levels. The sampling depths will account for the
approximate bottom depth of the USTs as well as the soil cuts proposed as part of future mass
grading to characterize all soils planned to be disturbed. Samples will be packaged in glass jars for
all analyses except for VOCs; the volatile analysis samples will be collected using soil sampling
as described in USEPA SW-846 Method 5035 such as Terracore samplers.
Additionally, one surficial composite soil sample will be taken from between 0 and 1 feet bgs on
the 117 South Boylan parcel. The composite will consist of four aliquots, collected using hand
tools. Each aliquot will be placed in a sample bag and sorted to remove organic and rocky material.
An approximately equal volume from each aliquot bag will be placed in a composite bag,
thoroughly mixed, and transferred to laboratory sample containers.
The soil samples will be transferred to laboratory -provided sample containers with appropriate
preservatives and packed on ice. The samples will be submitted to GTA's subcontracted North
Carolina -certified laboratory for analysis with a 10-business day turnaround time (TAT).
3.2 Groundwater Sampling
Groundwater sampling methodology will conform with the NCDEQ IHSB Guidelines for
Assessment and Cleanup of Contaminated Sites dated July 2021, which includes guidance for soil
remediation goals, naturally occurring background levels, sampling techniques, and quality
assurance. Groundwater results will be compared to the NCDEQ 15A NCAC 02L.0202 (2L)
groundwater standards updated in April 2022.
GTA will install temporary groundwater monitoring points in three borings so the groundwater
levels can be gauged and groundwater samples collected. The monitoring points will consist of 5

NCDEQ 25065-221-092 Boylan and Morgan
August 31, 2022 GTA Project No. 35172516x1
to 10 feet of 1-inch diameter PVC well screen in the lower portion of the borings, followed by 10
to 20 feet of PVC riser to grade. The wells will be screened across the apparent groundwater table
surface to intercept the groundwater table to evaluate whether free product is present.
GTA personnel will utilize an electronic oil -water interface probe to measure the depth to
groundwater and evaluate the possible presence of liquid -phase hydrocarbons (LPH). The
interface probe will be decontaminated prior to gauging each location. After gauging the depth to
water, the temporary monitoring points will be purged of approximately three times the volume of
water standing in the casing. GTA will collect "grab" groundwater samples from the temporary
groundwater monitoring points using a peristaltic pump and dedicated tubing lowered into the
temporary sampling point. The sample will immediately be placed in laboratory -supplied
containers and stored in a chilled cooler.
The groundwater gauging data, combined with a relative top-of-boring/ground surface survey, will
be used to estimate groundwater flow direction. Relative elevations at each temporary
groundwater monitoring point will be surveyed by GTA personnel, with an estimated accuracy of
±0.01 foot. Elevations will be measured relative to the transit elevation at the initial set point, with
an assumed elevation of 100.00 feet. Using the initial set point elevation and survey measurements
at each temporary groundwater monitoring point, elevations can be calculated for each monitoring
point such that a groundwater flow direction can be estimated.
3.3 Soil Vapor Sampling
Soil vapor sampling methodology will conform with the NCDEQ Division of Waste Management
(DWM) Vapor Intrusion Guidance dated March 2018, which includes the NCDEQ Risk Calculator
utilizing the carcinogenic risk threshold of E-06 and non -carcinogenic risk threshold of 0.2.
Residential screening levels will be used for comparison with the laboratory results.
The temporary sample points within the buildings will be sub -slab points constructed of
VaporPin® sample pins, installed in 5/8" holes drilled through the concrete floor slab or pavement
and extending approximately 2 inches below the floor slab into the underlying substrate. The
0

NCDEQ 25065-221-092 Boylan and Morgan
August 31, 2022 GTA Project No. 35172516x1
parented VaporPin® sampling point provides an air -tight seal through the existing concrete slab.
The slab thickness and any soil encountered during installation will be recorded at each sampling
location. Exterior soil vapor probes will be installed using the following methodology:
• Advance a hole using a direct -push Geoprobe® to a total depth of five feet bgs.
• Place one foot of clean, washed, well sand into the bottom of the boring.
• Insert a length of 1/4-inch outside diameter Nylaflow-T tubing, onto which a screened
implant is installed to the bottom of the tubing to allow the passage of air while
excluding soil and sand particles.
• Place an additional one foot of clean, washed, well sand to the annular space around
the screen.
• Place two feet of graded sodium bentonite granules (No 16 Holeplug(&) atop the sand.
• Backfill the remainder of the borehole with hydrated graded sodium bentonite chips
(Medium Holeplug®).
• Allow the sub -slab vapor probes to equilibrate for at least 20 minutes and soil vapor
probes to equilibrate for at least 48 hours to allow an effective seal and to account for
potential off -gassing of sampling point materials.
After equilibration, the points will be purged using either a peristaltic pump or hand pump attached
to the outflow tubing with a check valve for approximately 2 minutes (at least three volumes of
the air contained in the sample tubing), and the sample equipment will be assembled. The
equipment will be tested for leaks by enclosing the entire sample train within a helium -filled
shroud and analyzing the soil vapor extracted through the sampling equipment for helium using a
hand-held helium meter. A shroud will be placed over the sampling train and helium meter
connected to the outflow end of the shroud sample tubing for use as an access port to measure
helium content within the sample train for comparison to helium content within the shroud. Helium
concentrations of greater than 10% of the concentration within the shroud will be considered a
leak in the sample train and will be evaluated and corrected. Results of the leak test will be included
in the final report.
Once the leak test is complete, an individually certified clean 1-liter Summa canister, equipped
with a regulator to maintain a flow rate well below 200 ml/min, will be connected and activated.
The pressure gauge for the canister will be read immediately following connection and recorded
on the Chain of Custody document. Canisters will be checked for appropriate flow rate in the first
hour of the collection period, and every hour thereafter to prevent canister near -equilibration with
10

NCDEQ 25065-221-092 Boylan and Morgan
August 31, 2022 GTA Project No. 35172516x1
ambient air pressure. The canister will be disconnected after four hours or when the canister
vacuum decreases to approximately five inches of mercury. The final canister vacuum will be
recorded in the laboratory report and Chain of Custody documents. At the conclusion of the sample
period, the canisters will be sealed and removed, and packaged for transport to the selected
laboratory. The temporary points will be removed and the boreholes backfilled with sand to within
6 inches of the surface for exterior sampling points, and then finished with either 6" bentonite with
a soil cap or cement (for sub -slab points) to match the original surface.
A duplicate sample will be collected from location GTA-SV-3 by installing a "T" manifold to fill
two summa canisters simultaneously from the same point. The samples will be designated GTA-
SV-D to avoid association with any particular sampling location during analysis.
4.0 LABORATORY ANALYSIS
Soil samples submitted for laboratory analysis will be selected based on field observations and
screening, or groundwater depth and feature depth. Groundwater (GW) samples will be collected
from three locations most likely to be impacted, unless lack of volume precludes it; in such a case,
the groundwater sample will be collected from a different boring location. All soil vapor samples
will be submitted for analysis. GTA will collect and submit for laboratory analysis one duplicate
(DUP) for each media and include results between the practical quantitation limit of the laboratory
equipment and the reporting limit used for the analyte ("J flags"). The analytical program is
summarized below and in Table 1.
ID
Media
Rationale
Analysis USEPA Method
VOCs (8260), Semi-VOCs (8270),
Soil
RCRA 8 metals (6020), hexavalent
GTA-1
chromium 7196
VOCs (8260), Semi-VOCs (8270),
Adjacent to suspect UST at 613 W.
GW
Morgan
RCRA 8 metals (6020)
VOCs (8260), Semi-VOCs (8270),
GTA-2
Soil
RCRA 8 metals (6020), hexavalent
chromium 7196
South of former engine repair
VOCs (8260), Semi-VOCs (8270),
GTA-3
Soil
facility (Crocker and Son) at 613 W.
RCRA 8 metals (6020), hexavalent
chromium 7196
Morgan
GW
VOCs (8260), Semi-VOCs (8270),
11

NCDEQ 25065-221-092 Boylan and Morgan
August 31, 2022 GTA Project No. 35172516x1
ID
Media
Rationale
Analysis USEPA Method
RCRA 8 metals 6020
GW Dup
VOCs (8260), Semi-VOCs (8270),
RCRA 8 metals 6020
Soil
VOCs (8260), Semi-VOCs (8270),
GTA-4
RCRA 8 metals (6020), hexavalent
Soil Dup
West portion of 613/615 W. Morgan
chromium 7196
VOCs (8260), Semi-VOCs (8270),
Soil
parcel
RCRA 8 metals (6020), hexavalent
GTA-5
chromium 7196
GW
VOCs (8260), Semi-VOCs (8270),
RCRA 8 metals 6020
GTA-6
Soil
117 S. Boylan former residential
RCRA 8 metals (6020)
use/roof runoff
VOCs (8260), Semi-VOCs (8270),
GTA-7
Soil
Wooded portion of 615 W. Morgan
RCRA 8 metals (6020), hexavalent
chromium 7196
GTA-SV-1
Vapor
Former restaurant building at 615
W. Morgan
VOCs including naphthalene and
excluding acrolein (TO15)
GTA-SV-2
GTA-SV-3
613 W. Morgan
building
Northern portion
Vapor Dup
GTA-SV-4
Vapor
GTA-SV-S
Central onion
GTA-SV-6
Southern portion
GTA-SV-7
Within parking lot at proposed
GTA-SV-8
elevator shaft location
GTA-SV-9
GTA-SV-10
Wooded portion of 615 W. Morgan
The soil and groundwater samples will be transferred to laboratory -provided sample containers
with appropriate preservatives and packed on ice. Summa canisters will be packaged separately.
The samples will be submitted to GTA's subcontracted North Carolina -certified laboratory for
analysis with a 10-business day turnaround time. Reporting limits of the laboratory will meet
applicable screening criteria to the extent possible.
5.0 QA/QC
Non -dedicated downhole sampling equipment will be decontaminated by rinsing with tap water
and scrubbing with a brush and approved soap solution, followed by rinsing with distilled/de-
ionized water.
12

NCDEQ 25065-221-092 Boylan and Morgan
August 31, 2022 GTA Project No. 35172516x1
Per NCDEQ guidance of one duplicate per 20 samples for each media, based on the number of
samples proposed, GTA will collect and submit for laboratory analysis one duplicate for each
media. The samples planned for duplicate are indicated in Section 4.0. The soil sample chosen for
duplicate may be changed based on field observations to target the sample most likely to be
contaminated. One trip blank will also be included with the groundwater samples. GTA will
request that the laboratory include at least a Level II QA/QC, including J flags.
GTA will confirm with the laboratory the sufficient volume needed for groundwater and soil
samples to perform the requested analyses and QA/QC procedures. Generally, soil is provided in
two 4-ounce glass jars for most analyses and in the pre-set volumes for Terracore (VOC) sampling.
Groundwater analysis generally requires two unpreserved amber glass bottles and at least three
preserved glass VOAs. Summa canisters will be targeted to 5 inches of mercury vacuum.
Soil vapor samples do not require ice and will be shipped separately from soil and groundwater
samples. Soil and groundwater samples will be packed in ice, securely sealed to prevent breakage
or leaks, and shipped immediately following sampling on overnight delivery to the selected
laboratory.
6.0 INVESTIGATION DERIVED WASTE
Purge water from groundwater sampling activities will be containerized in a labeled 5-gallon
bucket with lid until sampling results are received. If groundwater is impacted, purge water will
be disposed offsite as appropriate following receipt of sampling results. Upon completion of the
investigation, the borings will be backfilled with drilling cuttings and/or bentonite. Piping from
temporary groundwater monitoring wells and tubing from soil vapor sampling will be removed
and disposed as solid waste.
7.0 REPORTING
GTA will prepare a Brownfield Assessment Report summarizing the sampling activities, analysis
results, conclusions, and recommendations. The report and attachments will include a description
of sampling activities, comparison of the data to regulatory screening levels or risk thresholds, a
13

NCDEQ 25065-221-092 Boylan and Morgan
August 31, 2022 GTA Project No. 35172516x1
figure depicting sampling locations, tabulated data, laboratory reports, soil boring logs, a
photographic log, and signature by a North Carolina -licensed PE or PG. The report will conform
with the NCDEQ's Brownfields checklists for Environmental Site Assessment Work
Plans/Reports and Vapor Intrusion Assessment Work Plans/Reports.
14

CAMERON PARK
D ou b I eTree by h i Iton
Hotel Raleigh , Br©wnst.-
en Park
Dorothea Dix P
Approximate Subject
Property Boundary
GLDNWC IOa
SOUTH
NORTH BOYLAN
ST f ARYS
TO WNHOMES
%'
.
Notes
1. Base map image obtained from Google Maps (©2022 Google)
r
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GEO-TECHNOLOGY ASSOCIATES, INC.
r GEOTECHNICAL AND ENVIRONMENTAL CONSULTANTS
14280 PARK CENTER DRIVE, SUITE A
LAUREL, MARYLAND 20707
[phone] OR [phone]
FAX: [phone]
www.gtaeng.com
© Geo-Technology Associates, Inc.
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0 1,000 2,000
Approximate Scale
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T3 BLOC 83
WAKE COUNTY, NORTH CAROLINA
SITE LOCATION MAP
I PROJECT: 35172516x1 I DATE: MARCH 2O22 I SCALE: 1" = 2,000' I DESIGN BY: NMT I REVIEW BY: EH I FIGURE: 1

I
Notes
Base image sourced
from Bloc83 Phase 3
Rendering.
0 50 100
Approximate Scale
1 inch = 100 feet
GEO-TECHNOLOGY ASSOCIATES, INC. T3 BLOC 83
GEOTECHNICAL AND ENVIRONMENTAL CONSULTANTS
14280 PARK CENTER DRIVE, SUITE A
p LAUREL, MARYLAND 20707 WAKE COUNTY, NORTH CAROLINA
[phone] OR [phone]
FAX: [phone] PROPOSED DEVELOPMENT PLAN
www'gtaeng.com
© Geo-Technology Associates, Inc.
PROJECT: 3571256X1 DATE: JUNE 2022 SCALE: 1" = 100' DESIGN BY: NMT REVIEW BY: KBD FIGURE: 2

Legend
Approximate NOVA located soil boring & temporary groundwater monitoring well locations.
Approximate NOVA located existing groundwater monitoring well location
Approximate GTA soil borings (2016)
Notes
1. Based on Google Earth Pro, aerial image 2018
2. Property boundaries and site features are approximate.
GEO-TECHNOLOGY ASSOCIATES, INC
o Q= o ° a GEOTECHNICAL AND ENVIRONMENTAL CONSULTANTS
rp E7
14280 PARK CENTER DRIVE, SUITE A
p LAUREL, MARYLAND 20707
[phone] OR [phone]
FAX: [phone]
www.gtaeng.com
© Geo-Technology Associates, Inc.
0 40 80
Approximate Scale
1 inch = 80 feet
T3 BLOC 83
WAKE COUNTY, NORTH CAROLINA
HISTORICAL SAMPLING
LOCATIONS
I PROJECT: 3571256X1 I DATE: JUNE 2022 1 SCALE: 1- = 80' I DESIGN BY: NMT I REVIEW BY: KBD I FIGURE: 3 1

a GEO-TECHNOLOGY ASSOCIATES, INC
4 4 GEOTECHNICAL AND ENVIRONMENTAL CONSULTANTS
14280 PARK CENTER DRIVE, SUITE A
LAUREL, MARYLAND 20707
[phone] OR [phone]
FAX: [phone]
www.gtaeng.com
© Geo-Technology Associates, Inc.
Legend
IIIIIIIII Fill 10+23
Cut 5+71
0 10 20
Approximate Scale
1 inch = 20 feet
T3 BLOC 83
WAKE COUNTY, NORTH CAROLINA
PROPOSED CUT/FILL AREAS
PROJECT: 3571256X1 DATE: JUNE 2022 SCALE: 1" = 20' IDESIGN BY: NMT IREVIEW BY: KBD FIGURE: 4

615 W 613 W 603 W
Morgan St. Morgan St. W. Morgan St.
Morgan St.
GTA-4 Suspected UST
GTA-2 locations
r GTA-SV-3
GTA-SV-1 � {�
IGTA-SV-4 -
'GTA SV 2
jY GTA-SV-5 !� �,•
GTA-SV-7
GTA-5
GTA-SV-6
GTA-SV-8
GTA-SV-10 GTA-3 - _ _
GTA-7 ,� - � � � ■
GTA-SV-9 tl W '
GTA-6 s
> I
'.I
o Subject Property I c �f l
Boundary
I
I Adjacent Brownfield
I I Property.
Hargett St.
dLMW Jae
Legend
411, GTA proposed Soil Vapor sampling location
GTA proposed soil and groundwater sampling locations
® GTA proposed soil sampling locations
0 40 80
Notes
1. Based on Google Earth Pro, aerial image 2018 Approximate Scale
2. Property boundaries and site features are approximate. 1 inch = 80 feet
o _ , n-D a GEO-TECHNOLOGY ASSOCIATES, INC. T3 BLOC 83
o t� o ° a GEOTECHNICAL AND ENVIRONMENTAL CONSULTANTS
lam— Q44�
14280 PARK CENTER DRIVE, SUITE A
p LAUREL, MARYLAND 20707 WAKE COUNTY, NORTH CAROLINA
(410)7FAX (44100)R79073950-4470 PROPOSED SAMPLING LOCATIONS
www.gtaeng.com
© Geo-Technology Associates, Inc.
PROJECT: 3571256X1 DATE: MARCH 2O22 SCALE: 1" = 80' DESIGN BY: NMT REVIEW BY: KBD FIGURE: 5

Table 1
Brownfield Sampling Matrix
eloc83 Tower 3
Raleigh, NC
GTA Project No. 35172516x1
Page 1 of 1
Media
Sample ID
Rationale
Depth
(feet)
Analysis/USEPA Method
RCRA Metals
Cr(VI)
VOCs
SVOCs
VOCs
6020
7196
8260B
8270
T015
Soil
GTA-1
GTA-2
GTA-3
Adjacent to suspect UST at 613 W. Morgan
Highest PID
reading or just
above
groundwater
✓
✓
✓
✓
✓
✓
✓
✓
✓
South of former engine repair facility (Crocker and
Son) at 613 W. Morgan
West portion of 613/615 W. Morgan parcel
117 S. Boylan former residential use
✓
✓
✓
GTA-4
✓
✓
✓
✓
GTA-4-DUP
✓
✓
✓
✓
GTA-5
✓
✓
✓
✓
✓
✓
✓
✓
GTA-6
0-1' composite
GTA-7
Wooded portion of 615 W. Morgan
Highest PID
reading or 0-2'
✓
✓
✓
✓
Groundwater
GTA-1
Adjacent to suspect UST at 613 W. Morgan
Varies
✓
✓
✓
GTA-3
South of former engine repair facility (Crocker and
Son) at 615 W. Morgan
✓
✓
✓
GTA-3-DUP
✓
✓
✓
GTA-5
West portion of 613/615 W. Morgan parcel
✓
✓
✓
Trip Blank
N/A
✓
✓
✓
Soil Vapor
GTA-SV-1
Former restaurant building at 615 W. Morgan Street
Sub -slab
✓
GTA-SV-2
✓
GTA-SV-3
Northern
613 W. Morgan Street building
Central
Southern
Within parking lot at proposed elevator shaft
location
Wooded portion of 615 W. Morgan Street
✓
GTA-SV-3-DUP
✓
GTA-SV-4
✓
GTA-SV-5
✓
GTA-SV-6
✓
GTA-SV-7
5'
✓
GTA-SV-8
✓
GTA-SV-9
✓
GTA-SV-10
✓
Notes:
Cr(VI) = Hexavalent chromium
SVOCs = Semi -volatile organic compounds
USEPA = United States Environmental Protection Agency
USTs = Underground storage tanks
VOCs = Volatile organic compounds
W AMM .5.�

North Carolina Department of Environmental Quality
Division of Waste Management
Brownfields Program
BROWNFIELDS PROPERTY RECEPTOR SURVEY
This form was created to clarify and simplify preparing a receptor survey for a brownfield site. Please provide the
information requested below. Distances are measured from the site property boundary unless otherwise indicated
by the DEQ Brownfield's Project Manager (PM).
Site:
Address:
City:
County:
Brownfields Project Number:
Property and Building Characteristics
Surface Conditions
Current Usage
Proposed Usage
Size of Property (acres)
% of property that is wooded/brush
% of property that is grassed areas
% of property that is agricultural crops
% of property that is paved
% of property that is covered by buildings
If an existing building is on -site, please respond to the following. Information can be provided on additional sheets
as needed. If numerous buildings are on -site, consult with your PM as only information on specific buildings may be
needed.
a. Provide occupancy and use information.
b. Describe the construction of the builidng including materials (e.g. wood frame, block), type and size of openings
(e.g. windows, bay doors), and height (number of stories).
c. Describe the foundation construction. Include details on type, floor construction, and depth below grade.
d. Describe the HVAC system in the building. Include available details on type, equipment location, source of air
return, and design considerations (e.g. positive pressure?).
e. Are any subslab ventilation systems or moisture barriers in place? If so, please provide details.
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North Carolina Department of Environmental Quality
Division of Waste Management
Brownfields Program
Surrounding Property Land Use
Please provide information on the following land uses in the vicinity of the subject site, including a map of the
surrounding areas. If specific receptors are present, please provide addresses of the facilities.
Zoning/Land Use
Current Use/Occupant
Proposed Usage
North
South
East
West
Specific Land Uses of Interest
YIN *
�ft� Distance
Direction
Address
Is a school or daycare center within 1,000 ft of the Property?
Is there a residence within 1,000 ft of the Property?
Is there a basement within 1,000 ft of the Property
* If numerous facilities of interest are present, their locations can be placed on a map in lieu of providing specific
addresses.
Utilities
For the subject property, please provide a map of known buried utilites. If available, include depth to top,
construction material, and diameter of the utilities. In addition, please provide the following information on utilty
providers. If additional assessment is required, the public utility locators should be contacted. This information can
then be added to a site map.
Is there a septic system on -site? (Y or N)
Please provide the utility providers for the subject property
a. Natural Gas
b. Sewer
c. Electricity
d. Other
For surrounding properties, please complete the following table with available information.
Utility/Potential Receptor
Y/N
Distance
Direction
Is a storm water pipe within 100 ft of the Property boundary?
Is a sanitary sewer within 100 ft of the Property boundary?
Is a septic system leach field within 500 ft of the Property boundary?
Is a water line main within 100 ft of Property boundary?
Is a natural gas line main within 100 ft of the Property boundary?
Is a buried telephone/ cable main within 100 ft of the Property boundary?
Is a buried electrical cable main within 100 ft of Property boundary?
* If yes, please provide a map or detailed information (distance, direction, depth) of the utility in correlation with
the subject property.
Rev. 09/2015 Page 2 of 3

North Carolina Department of Environmental Quality
Division of Waste Management
Brownfields Program
Water Supply
The purpose of this section is to provide information on the water supply for the site and surrounding areas.
What is the potable water supply for the property? Public Private
If Private, please provide details of the water supply source (i.e. well location, well construction, etc). If public,
please include the water providers name.
Please provide the following information regarding water supply wells in the vicinity of the Property. At a
minimum, a windshield survey within 1,500 ft of the property boundaries should be completed to determine if
water supply or irrigation wells may be present. Information from applicable databases can and should be utilized;
however, should not be utilized in lieu of the windshield survey. If multiple wells are present within the requested
radius, please provide a map of the well locations. If needed, please attach a separate table to list all wells. Please
note, the PM may opt for a more extensive water supply well survey if needed.
Water Supply Wells
Y/N
Distance� ft�
Direction
Address
Is a public water supply well within 1 mile of the Property boundary?
Is a private water supply well within 1,500 ft of the Property
Is an irrigation well within 1,500 ft of the Property boundary?
Surface Water & Wetlands
The purpose of this section is to provide information on the presence of surface waters and/or wetlands on, or in the
vicinity of the Property.
Provide Information regarding Surface Water
Response/Comments
and Wetlands
Are there surface water features on the
property? (If yes, please complete a. to d.)
a. Is the water body naturally developed or
man-made?
b. List the uses of the water body.
c. What is the source of the water for the
water body?
d. What is the nature of the bottom of the
water body (e.g., rocky or concrete bottom,
drainage ways or impoundments)
If no on -site surface water features, what is the
nearest surface water body?
Are there any wetlands present on the property?
If no wetlands on -site, are wetlands suspected
on adjoining properties?
Rev. 09/2015 Page 3 of 3