22010_Glenwood Square_Workplan_20181024

,s Glenwood Two Assemblage
Raleigh, North Carolina
►� Proposed Work Plan
Phase II Environmental Site Assessment
August 27, 2018, Revised September 24 and October 24, 2018
(Page I of 12)
GTA Associates, Inc. (GTA), at the request of Heritage Properties, Inc. ("Client"), has
prepared a Phase II Environmental Site Assessment (ESA) Work Plan for the properties located
at 615, 621, 623, 701, and 709 Hillsborough Street; and 11 and 117 South Boylan Avenue,
Raleigh, North Carolina ("subject property"). This Work Plan has been prepared as requested by
the North Carolina Department of Environmental Quality (NCDEQ), as discussed during an on -
site meeting July 5, 2018, and as part of Brownfields Project Number 22010-18-092. This Work
Plan has been revised in accordance with NCDEQ comments dated August 30, 2018. GTA
previously prepared Environmental Site Assessments (ESAs) including:
• Phase I ESA: 623 Hillsborough Street and 11 South Boylan Avenue, dated
January 12, 2018;
• Phase I ESA: 621 Hillsborough Street, dated July 11, 2018;
• Phase I ESA: 701 Hillsborough Street, dated July 24, 2018; and
• Phase I ESA: 709 Hillsborough Street, dated July 20, 2018.
A Phase I ESA is planned to be completed for 615 Hillsborough Street. Prior environmental
work at 615 Hillsborough Street (see Section 1.2, below) has allowed placement of sample
locations to evaluate potential impacts, although a complete Phase I ESA is planned.
1.0 INTRODUCTION
1.1 Site Description
The property is located south of Hillsborough Street and north of West Hargett Street,
between Glenwood Avenue to the east and south Saint Mary's Street to the west, within the city
limits of Raleigh, Wake County, North Carolina, and is currently occupied by five commercial
structures containing vacant office space (709 Hillsborough Street and 11 South Boylan
Avenue), office space occupied by a non-profit organization (615 Hillsborough Street), a
restaurant (623 Hillsborough Street), a vacant automobile repair shop (701 Hillsborough Street),
and a retail facility and residence (621 Hillsborough Street). The original Brownfields Property
Application included a vacant lot at 117 South Boylan Avenue, and negotiations were underway
to acquire the property adjacently north of that lot (615 West Morgan Street). However, those
negotiations have ceased, and the 117 South Boylan property is being removed from the
Brownfields project.
The overall subject property is comprised of five parcels encompassing approximately
1.99 acres of land. The properties were developed with residential structures prior to 1909. The
existing buildings were constructed beginning prior to 1909 (709 Hillsborough Street) and as
redevelopment of the residential properties between the 1940s and the 1980s. The two former
gasoline stations were constructed in the mid- to late-1940s and in about 1956. The subject
property and surrounding area are provided municipal water and sewer services.

,s Glenwood Two Assemblage
Raleigh, North Carolina
►� Proposed Work Plan
Phase II Environmental Site Assessment
August 27, 2018, Revised September 24 and October 24, 2018
(Page 2 of 12)
1.2 Site History
Based on information obtained during the Phase I ESAs listed above, the properties were
developed with residential structures by 1909. Redevelopment occurred as follows:
• 615 Hillsborough Street: the residence was removed between 1938 and 1949,
and a building consistent with the existing building was constructed. The
building was indicated to contain a bank in 1950 and 1972. The vaults were
shown on the southern end of the building.
• 621 Hillsborough Street: the residence was expanded between 1938 and 1949
by addition of a storefront to the northern side of the building. During the Phase I
ESA a suspect UST, likely heating oil, was identified adjacent to the southeastern
corner of the building.
• 623 Hillsborough Street: the residence was removed between 1938 and 1949
and a gasoline station, consistent with the existing building, was constructed.
Underground storage tanks (USTs) were depicted north of the building on a 1950
Sanborn Fire Insurance Map; on a 1972 map they are not present.
• 701 Hillsborough Street: The northern residence was replaced with a gasoline
station in approximately 1956. The southern residence was removed between
1959 and 1965, and the southern portion of the parcel was used for parking. The
facility stopped selling gasoline and was converted to an automobile repair shop
between 1972 and 1982, and operated as a repair shop from approximately 1987
to 2017.
• 709 Hillsborough Street: the residence was expanded to the south between 1993
and 1998. The building was converted to office space prior to construction of the
addition.
• 11 South Boylan Avenue: the southern portion of this parcel was occupied by a
residence by 1909. Between 1938 and 1950 an apartment building had been
constructed on the northern portion of the parcel and the southern building was
indicated to also contain apartments. Between 1965 and 1968 the northern
apartment building was removed, and between 1968 and 1971 the southern
building was removed and a structure consistent with the existing vacant office
building was constructed.
Properties in the vicinity generally were residential use by 1909 and were developed for
commercial use in the 1940s through 1960s. Notable surrounding properties include:
• 630 Hillsborough Street: this parcel was depicted as vacant land in 1909. By
1914 a church was under construction on the western portion of the parcel, and a
residence had been constructed on the eastern portion. The church had been
completed by 1938, and both the church and residence were removed between
1950 and 1959 and a gasoline station consistent with the existing building had

,s Glenwood Two Assemblage
Raleigh, North Carolina
►� Proposed Work Plan
Phase II Environmental Site Assessment
August 27, 2018, Revised September 24 and October 24, 2018
(Page 3 of 12)
been constructed on the western portion of the property. By 1965 a building
consistent with the existing eastern building, labeled as a restaurant on a 1972
Sanborn Map, had been constructed on the eastern portion of the property.
1.3 Environmental History
Prior environmental investigations have been conducted at several of the properties.
These investigations are summarized below, by property:
• 615 Hillsborough Street: The building was historically heated using fuel oil
stored in a 6,500-gallon UST, reportedly installed in November 1949, located
immediately south of the building. The UST was removed in October 2005.
Prior to UST removal, four soil samples were collected from approximately 15
feet below ground surface (bgs) adjacent to the corners of the UST, after
excavation confirmatory soil samples were collected from the excavation, and
subsequent follow-up soil samples were collected through the backfilled
excavation depth below the bottom of the excavation and from the UST vicinity.
During the UST closure activities a groundwater sample was collected from an
apparently pre-existing monitoring well located south of the building.
Soil samples collected from the vicinity of the northwestern corner of the
UST contained elevated concentrations of total petroleum hydrocarbons (TPH)
gasoline -range organics (GRO) and TPH diesel range organics (DRO). A follow-
up sample, collected east of the original sample location, did not detect
hydrocarbons above the laboratory reporting limit.
A groundwater sample collected from the monitoring well contained di -
isopropyl ether and methyl tertiary butyl ether, compounds typically used to boost
octane in gasoline. Because these compounds are not typically found in heating
oil, their presence was attributed to groundwater contamination emanating from a
upgradient nearby gasoline station.
• 623 Hillsborough Street: The existing building, formerly occupied by a gasoline
station and automobile repair center, was constructed in the late 1940s and
operated until the mid-1970s. According to a 1950 Sanborn Fire Insurance Map
the gasoline station originally contained four USTs of unspecified contents and
capacities. Two 2,000-gallon, one 5,000-gallon, and one 3,000-gallon gasoline
USTs and one 500-gallon used oil UST, were removed from the northern portion
of the site in 1993 and, reportedly, perforations were noted in several of the USTs
during removal. Approximately 760 tons of hydrocarbon -impacted soil was
excavated from the tank vicinity and removed from the site for disposal.
Subsequent soil sampling conducted in 1994 and 2004 identified hydrocarbon soil
contamination in the vicinity of the former UST field at concentrations above the
Soil to Groundwater Maximum Soil Contaminant Concentrations (MSCCs), and
naphthalene was detected at a concentration above the Residential MSCC.

,s Glenwood Two Assemblage
Raleigh, North Carolina
►� Proposed Work Plan
Phase II Environmental Site Assessment
August 27, 2018, Revised September 24 and October 24, 2018
(Page 4 of 12)
In a 1994 comprehensive site assessment a groundwater contamination
plume was identified in the western and southern portion of the subject property.
Several monitoring wells were installed as part of this assessment, and
groundwater was approximately 21 to 28 feet bgs; the apparent groundwater flow
direction was calculated to be to the southeast. A manhole cover associated with
one of the monitoring wells was observed on the 621 Hillsborough Street property
during GTA's 2018 site reconnaissance. During the site visit, GTA removed the
monitoring well cover. The well had been abandoned and filled with cement.
• 701 Hillsborough Street: The northern portion of the existing vacant automobile
repair building was constructed in approximately 1956. The southern portion of
the building was constructed between 1981 and 1993. Reportedly, four gasoline
USTs have been removed from the site. No documentation is available regarding
the locations, sizes, or confirming the contents of the USTs. The USTs were
believed to have been located on the east -central portion of the site. One UST
remains in the ground at the site; the size and contents are unknown. Prior reports
identify it as containing either used oil or heating oil. Three ASTs are present at
the site: two vertical, approximately 750 gallon used oil above -ground storage
tanks (ASTs); one "Lube Cube" labeled as containing motor oil, and one
apparently abandoned 550-gallon AST located adjacent to the western side of the
building.
The service bays in both the older and newer sections of the repair shop
historically contained in -ground hydraulic lifts. Three of the service bays exhibit
concrete patches in the approximate former locations of the lifts, but one bay
contains the top of the lifting cylinder and is not patched. No documentation of
the lift removals or associated soil evaluations was available for review.
Soil and groundwater investigations were conducted in 2015 and 2017.
Soil samples were collected from the suspected former UST and dispenser island
locations, and in the southern parking area. Sample analysis detected volatile
organic compounds (VOCs), semi -volatile organic compounds (SVOCs), and
TPH at concentrations above the Soil -to -Groundwater MSCCs in the vicinity of
the former dispenser islands. TPH GRO and TPH DRO were detected at
concentrations above North Carolina Department of Environmental Quality's
(NCDEQ's) UST Action Limits in soil samples collected from the vicinity of the
former dispenser island, the suspected former UST field, and the southern parking
area.
One permanent and two temporary monitoring wells were installed as part
of these evaluations. The permanent monitoring well was observed during GTA's
site reconnaissance. Groundwater samples were collected from these wells and
contained gasoline indicator compounds and other VOCs, SVOCs, and TPH GRO
and TPH DRO at concentrations above the 2L Groundwater Standards.

,s Glenwood Two Assemblage
Raleigh, North Carolina
►� Proposed Work Plan
Phase II Environmental Site Assessment
August 27, 2018, Revised September 24 and October 24, 2018
(Page 5 of 12)
The prior evaluations were submitted to the NCDEQ for review. The
NCDEQ issued a No Further Action letter for the site on October 15, 2017. This
letter indicated that the groundwater contamination meets the cleanup
requirements for a low -risk site. This letter also stated that due to elevated
groundwater contamination, groundwater in this area should not be used as a
potable water supply.
• 630 Hillsborough Street (Adjacent Property): Three 4,000-gallon gasoline,
one 2,000-gallon diesel fuel, and one 1,000-gallon used oil UST were installed at
the site in the 1960s and 1970s. Three of the 4,000-gallon USTs were removed in
1993 and replaced with three new 4,000-gallon gasoline USTs in the same
excavation. The 1,000-gallon used oil UST was removed in 1999. The remaining
USTs were removed in April 2014.
Measureable (0.42 feet) of liquid -phase hydrocarbons (LPH) were
detected in February 2004 in a monitoring well located on the southern property
boundary, adjacent to 623 Hillsborough Street. A second monitoring well in the
southwestern portion of the property, adjacent to both 623 Hillsborough Street
and 701 Hillsborough Street. Historically, LPH was detected in those two
monitoring wells, one additional monitoring well on the site, plus one monitoring
well on the central portion of the 623 Hillsborough Street property.
Soil samples collected from the UST excavation in 1993 were analyzed
for TPH and contained concentrations above the then -current NCDENR "Action
Level" in five of nine samples collected. Soil samples collected from the area of
the USTs in 2004 contained TPH concentrations above the Soil -to -Groundwater
MSCCs.
Groundwater samples were collected in 1993, 1999, and 2004. Samples
collected from three monitoring wells in 1993 exceeded the NC 2L Groundwater
Standards. The 1999 sampling event included one additional on -site monitoring
well and one located on the 623 Hillsborough Street property. Those samples
contained benzene concentrations above the NC Gross Contamination Levels in
three monitoring wells, and LPH was detected in the fourth on -site monitoring
well. The 2004 groundwater samples contained concentrations of gasoline target
compounds and oxygenate compounds above the NC 2L Groundwater Standards,
and the 2004 report contained benzene, BTEX, and MTBE groundwater plume
maps depicting the plume extending beneath Hillsborough Street and beneath the
623 Hillsborough Street property.
Based on the historical uses and known environmental impacts at the subject property,
GTA proposes to conduct the activities described in the following Sections to evaluate the
potential presence of abandoned USTs and assess soil, groundwater, and soil vapor conditions at
the subject property.

,s Glenwood Two Assemblage
Raleigh, North Carolina
►� Proposed Work Plan
Phase II Environmental Site Assessment
August 27, 2018, Revised September 24 and October 24, 2018
(Page 6 of 12)
2.0 GEOPHYSICAL SURVEY
Because the subject property contains two former gasoline stations, both of which were in
operation from the 1940s or 1950s, GTA proposes to perform a geophysical survey on those
properties to determine if abandoned USTs and associated product piping are present. Proposed
areas to be included in the geophysical survey are shown on Figure 1, Proposed Sample
Location Plan.
The geophysical methods used may include magnetics, electromagnetics (EM), and
ground penetrating radar (GPR) depending on site conditions. An EM-2 will be used in a series
of traverses across each designated area to identify significant, large magnetic anomalies, which
will be marked in the ground surface using marking paint. A GPR survey, consisting of a series
of profiles in a grid pattern across the areas of interest will be used to fine-tune the magnetic
anomalies and look for anomalies caused by non-magnetic objects. Anomalies will again be
marked on the ground surface using marking paint. Additional GPR passes through anomalies
will help fine-tune anomaly locations.
Please be aware that the 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, 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.
3.0 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 will complete the NCDEQ Brownfields Property Receptor Survey Form
(attached) upon completion of the receptor survey.

,s Glenwood Two Assemblage
Raleigh, North Carolina
►� Proposed Work Plan
Phase II Environmental Site Assessment
August 27, 2018, Revised September 24 and October 24, 2018
(Page 7 of 12)
4.0 FIELD SAMPLING ACTIVITIES
GTA proposes to collect, field screen, and submit select surface and subsurface soil,
groundwater, and soil vapor samples to evaluate subsurface conditions at the subject property.
4.1 Surface and Subsurface Soil Sampling
The proposed sampling locations are shown on Figure I — Proposed Sample Location
Plan, but may be adjusted in the field based on results of the geophysical survey, private and
public utility locator findings, or professional judgement. Soil boring locations will be verified
in the field based on observable landmarks (roadways, building foundations, etc.) and soil boring
logs (field observations, soil classifications, PID readings, etc.) will be included in the final
report.
Prior to performing intrusive activities, GTA will notify NC811 and retain a private
utility location contractor to evaluate potential utility interference at the exploration locations.
GTA will then mobilize a direct -push drill rig to the site for up to three days of drilling.
GTA proposes to advance soil borings for two distinct purposes: to document current
soil and groundwater conditions, and to qualitatively evaluate the extent of hydrocarbon -
impacted soil. Documentation of current soil and groundwater conditions will be performed
through collection of soil and groundwater samples at specific locations, as shown on Figure 1.
Borings for Sampling
To collect the samples, GTA proposes to perform up to 10 direct push soil borings to
depths of up to 35 feet bgs, to groundwater, or to equipment refusal, whichever occurs first.
During advancement of the borings, continuous cores will be collected and initially field
screened within the sample core tube using a PID, which is capable of detecting volatile organic
vapors, such as those typically associated with petroleum and some solvents. After sample
collection as outlined below, select portions of the cores will be placed in sealed plastic bags for
further field screening by head space analysis. Volatile organic compound (VOC) samples will
not be collected from soil placed in the sealed plastic bags.
Up to 10 soil samples will be submitted for laboratory analysis from those portions of the
sample cores obtained from above the groundwater table exhibiting the highest PID reading,
areas of visible staining, strong odor, or the sample at the elevation of the anticipated depth of
disturbance (final grade). The VOC soil samples will be collected using Terracore or similar
sampling equipment, following USEPA Method 5035, directly from the soil core immediately
after collection. These samples will be discrete soil samples, not composited over the entire core
sampling interval. If other contamination types are identified during the screening process, GTA
will collect samples by a USEPA-approved method applicable to such contamination.

,s Glenwood Two Assemblage
Raleigh, North Carolina
►� Proposed Work Plan
Phase II Environmental Site Assessment
August 27, 2018, Revised September 24 and October 24, 2018
(Page 8 of 12)
Samples will be placed in new, laboratory -supplied containers with appropriate
preservatives, stored in a chilled cooler, and transported under Chain of Custody protocol to a
North Carolina licensed laboratory for analysis (see Section 3.5). Table 1 -- Proposed Sample
Matrix Table identifies the proposed sample depths, locations, and proposed laboratory analyses.
Borings for Delineation
In addition to the specific locations shown on Figure 1, GTA will delineate the extent of
hydrocarbon -impacted soil by advancement of shallower soil borings and field screening soil
samples using a PID. Select portions of the delineation cores will be placed in sealed plastic
bags for field screening by head space analysis. VOC samples will not be collected from soil
placed in the sealed plastic bags. Locations of these borings will be determined based on field
screening results; therefore individual boring locations are not shown on Figure 1. Borings will
be performed south of 615 Hillsborough Street, north and south of 623 Hillsborough Street, in
the vicinity of the suspect UST at 621 Hillsborough Street, and throughout 701 Hillsborough
Street.
Soil borings advanced to delineate impacted soil will be extended to approximately 10 to
15 feet, depending on historic contamination depths and anticipated depth of disturbance.
Continuous soil cores will be collected during advancement of the borings. Soil samples will be
placed in sealed plastic bags for field screening using a PID.
4.2 Groundwater Sampling
GTA personnel will collect groundwater samples from the borings indicated on Table I
for laboratory analysis, and the remaining borings if contamination is detected during soil field
screening. To collect the samples, GTA will place temporary groundwater sampling points,
consisting of 1-inch diameter PVC casing and sufficient well screen to extend above the water
table, in the boreholes. Prior to sampling, GTA will gauge depth to groundwater in each boring
using an oil/water interface probe. The temporary groundwater monitoring points will be
purged and sampled using low -flow sampling techniques. GTA will employ low -flow
groundwater sampling techniques utilizing a peristaltic pump and dedicated tubing to purge and
sample groundwater from the groundwater monitoring wells. Clean disposable polyethylene
tubing connected to the peristaltic pump will be lowered into the monitoring well so that the
intake is located in the middle of the well screen. The pump will be activated to its lowest
setting and the pumping rate will be increased gradually to the maximum rate at which the water
level remains constant (i.e., pumping rate equals recharge rate). Adjustments to the pumping rate
will be made to prevent the water table from dropping too quickly and dewatering the well.
Water quality parameters will be monitored immediately for stabilization, and sampling
logs, including the parameter readings, will be included in the final report. Parameters will
include temperature, conductivity, pH, oxidation/reduction potential (ORP), turbidity, and
dissolved oxygen (DO). Readings will be taken at approximate 5-minute intervals. Stabilization
will be defined as three successive readings within f 10% for temperature, conductivity, pH, and

,s Glenwood Two Assemblage
Raleigh, North Carolina
►� Proposed Work Plan
Phase II Environmental Site Assessment
August 27, 2018, Revised September 24 and October 24, 2018
(Page 9 of 12)
ORP. Stabilization will be achieved within f 10% or within in a range of 0.2 milligrams per liter
for DO.
After the parameters stabilize, groundwater samples will be collected for analyses. The
containers will be stored in a chilled cooler and transported to GTA's North Carolina -certified
laboratory under Chain of Custody documentation. Purge water will be discharged to the ground
surface and be allowed to infiltrate into the ground unless LPH or dense non -aqueous phase
liquid (DNAPL) is observed. If LPH or DNAPL is observed, the purge water will be
containerized and stored on site pending proper disposal.
The groundwater samples will be collected using a disposable bailer or peristaltic pump.
The samples will be placed in new, laboratory -provided sample containers with appropriate
preservatives, stored in a chilled cooler, and transported under Chain of Custody protocol to a
North Carolina licensed laboratory for analysis (see Section 3.6, below). The samples will be
analyzed as described in Table 1.
After sample collection, the temporary groundwater sampling points will be removed and
the borings will be backfilled with drill cuttings and bentonite, then capped with asphalt, gravel,
or soil, as appropriate.
GTA will estimate the groundwater flow direction using the temporary monitoring points.
The temporary monitoring points will be gauged for depth to water, and the relative top of casing
elevations at each temporary monitoring point will be surveyed to obtain relative groundwater
elevation data. Depth to water data obtained during well gauging will be used to calculate
relative groundwater elevations for each temporary monitoring point, and a groundwater contour
map will be constructed. The approximate groundwater flow direction will be evaluated based
on the contour map.
4.3 UST Closure and Hydraulic Lift Removal
Removal of the suspect USTs at 621 and 701 Hillsborough Street, the abandoned in -
ground hydraulic lift at 701 Hillsborough Street, and evaluation of any anomalies identified
during the geophysical survey, will be managed using the Environmental Management Plan
developed after completion of the work described in this Work Plan.
4.4 Soil Vapor Sampling
To evaluate potential volatile hydrocarbon vapor impact to proposed future development,
GTA proposes to collect sub -slab soil vapor samples from the existing buildings and a soil vapor
sample from the footprint of the proposed building southwest of the existing 623 Hillsborough
Avenue structure. Dedicated tubing and laboratory -cleaned, dedicated fittings will be used on
soil vapor and sub -slab vapor sampling points.

,s Glenwood Two Assemblage
Raleigh, North Carolina
►� Proposed Work Plan
Phase II Environmental Site Assessment
August 27, 2018, Revised September 24 and October 24, 2018
(Page 10 of 12)
GTA proposes to install sub -slab soil vapor sample points at five locations shown on
Figure 1, in the lowest levels of the existing buildings, at least 10 feet from exterior walls or
observable cracks. The sample points within the buildings will be constructed using VaporPiri
sample pins, installed in 5/8" holes drilled through the concrete floor slab and extending
approximately 12 inches from the top of the floor slab. If possible, materials encountered below
the concrete slab will be identified and described in the project field notes. The patented
VaporPiri sampling point provides an air -tight seal through the existing concrete slab.
The soil vapor sampling point will be installed in a 7-foot deep direct -push soil boring,
and will consist of a stainless steel screened implant connected to 1/4-inch outside diameter
Nylaflow-T tubing, placed within a two -foot layer of clean, washed well sand. After installation
of the boring, one foot of well sand will be placed at the bottom of the borehole, the implant will
be placed, and another foot of well sand will be placed over the implant. The remainder of the
borehole will be backfilled with hydrated bentonite, placed in lifts.
The sample points will be allowed to equilibrate for 2 hours. After equilibration, the
points will be purged using a peristaltic pump for approximately five minutes (at least three
volumes of the air contained in the sample tubing), and the sample equipment will be assembled.
The equipment will then 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.
Air extracted through the sampling train will be captured in a Tedlar bag and will be analyzed for
helium content. A helium concentration 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 testing will be included in the final report. Once the leak test is complete, a
laboratory -certified clean 1.4-liter Summa canister, equipped with a 4-hour flow regulator, will
be connected and activated. The canister will be disconnected, ending the sample period, after
four hours or when the canister vacuum decreases to between three and five inches of mercury
vacuum. Any canister which exhibits a final vacuum reading of zero will be disregarded and
resampled. The final canister vacuum and the vacuum when received at the laboratory will be
reported on the laboratory report and Chain of Custody documents. At the conclusion of the
sampling period, the canisters will be sealed, removed, and submitted to GTA's North Carolina -
certified laboratory for analysis of VOCs by USEPA Method TO-15 plus naphthalene.
After completion of sampling the sample points will be removed, the boreholes filled
with bentonite, and the ground surface repaired with concrete, asphalt, or topsoil, as appropriate.
4.5 Sample Handling and Chain -of -Custody Documentation
Soil and groundwater samples will be collected in pre -preserved (if applicable)
laboratory -supplied sample containers and immediately placed on ice for shipment to a North
Carolina licensed laboratory.

,s Glenwood Two Assemblage
Raleigh, North Carolina
►� Proposed Work Plan
Phase II Environmental Site Assessment
August 27, 2018, Revised September 24 and October 24, 2018
(Page 11 of 12)
Soil vapor samples will be collected in laboratory -supplied summa canisters with a 4-
hour regulator. After the 4-hour sample period the canisters will be packaged for shipment to a
North Carolina licensed laboratory.
Samples will be labeled for proper identification in the field and for tracking in the
laboratory. The sample labels will contain the following information:
• Site name and designated project number;
• Initials of the sampler;
• Sample identification number and sample location;
• Date and time of sample collection;
• Analyses to be performed; and
• Preservative added (if any).
Field documentation will include logbooks, photographs, sample labels, custody seals,
and chain -of -custody forms. Field logbooks will document project information. Logbook
entries will be completed and the following sampling information will be recorded:
• Sample identification number, location, and description;
• Name of sampler(s); date and time of sample collection;
• Designation of sample as composite or grab; type of sample (i.e., matrix); and
• Type of sampling equipment used.
Logbooks will be bound, ruled, and each page numbered. All entries in field logbooks
will be in indelible ink, and corrections may be made by striking out erroneous information with
a single horizontal line so that the original entry remains legible and initialing the change.
4.6 Decontamination Procedures
Non -dedicated 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. Decontamination fluids will be containerized for later characterization and disposal.
5.0 LABORATORY ANALYSIS
The soil, groundwater, and soil vapor samples described above will be submitted for
laboratory analysis as presented in Table I - Proposed Sample Matrix Table, with request to
ensure the laboratory detection limits are below the NCDEQ regulatory limits for all analytes.
The sampling scheme may be modified based on field screening results and site observations, if
necessary. The samples will be submitted on an approximate 5-day turnaround time.

,s Glenwood Two Assemblage
Raleigh, North Carolina
►� Proposed Work Plan
Phase II Environmental Site Assessment
August 27, 2018, Revised September 24 and October 24, 2018
(Page 12 of 12)
6.0 REPORT
GTA will prepare a report describing the field activities, and including scanned field
notes, geophysical survey findings, sample location plans, soil boring logs, a summary of the
sampling activities, analytical results summary tables, laboratory reports, conclusions, and
recommendations. Laboratory results summary tables will include laboratory reporting limits
and comparisons to the Residential Preliminary Soil remediation Goals, NC 2L groundwater
standards, NCDEQ Residential VI Screening Levels for Groundwater, and/or the NCDEQ
Residential VI Screening Levels for soil gas, as appropriate. The report will be signed and
sealed by a North Carolina licensed Professional Geologist or Professional Engineer.
S:\Project Files\2018\! Glenwood Assemblage\Docs - General\Work Plan - Glenwood Two\Revised Glenwood Two Brownfields Ph II Work
Plan 2018-09-24 - revised 2018-10-24.docx
Attachments:
Figure 1 —Proposed Sample Location Plan (11 " x 17 ", color)
Table I — Proposed Sample Matrix Table (color)
Attachment I — NCDEQ Brownfields Property Receptor Survey Form (3 pages)

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GTA-SV-4 ,
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Approximate Subject
Property Boundaries •,+ 1
WEST MORGAN STREET 0 25 50
k Approximate Scale
1 inch = 50 feet
t 1
w GTA ASSOCIATES INC.
GEOTECHNICAL AND ENVIRONMENTAL CONSULTANTSMIL LP ow GLENWOOD TWO
14280APARK
EL,MARCENTER
LAND20707 A RALEIGH, NORTH CAROLINA
- � LAUREL, MARYLAND 20707
[phone] OR [phone]
FAX: [phone] PROPOSED SAMPLE LOCATION
_ www.gtaeng.com PLAN
l - © Geo-Technology Associates, Inc.

Table 1
Proposed Sample Matrix Table
Glenwood Two Assemblage
Raleigh, North Carolina
Page 1 of 1
GTA Project No. 35151659
Media
Location
Depth
feet
Anal sis/USEPA Method
Location/Sampling Rationale
VOCs
SVOCs
RCRA 8
Metals
VOCs
8260B
8270
6020
TO-15
Soil
GTA-01
GTA-02
GTA-03
GTA-04
GTA-05
GTA-06
GTA-07
GTA-08
GTA-09
GTA-10
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
Within /adjacent to former 6,500-gallon heating oil UST south of 615 Hillsborough Street
Adjacent to suspect UST at 621 Hillsborough Street
South of former gasoline station at 623 Hillsborough Street
Within former UST Feld at 623 Hillsborough Street
In southern portion of lot at 701 Hillsborough Street
Within service bays at 701 Hillsborough Street, in vicinity of former in -ground hydraulic lifts
Within service bays at 701 Hillsborough Street, in vicinity of former in -ground hydraulic lifts
Within former UST field at 701 Hillsborough Street
In vicinity of former dispenser island at 701 Hillsborough Street
Adjacent to the rear of the 709 Hillsborough Street building
Groundwater
GTA-01
GTA-03
GTA-04 GTA-08
GTA-09
GTA-10
Varies
✓
✓
Samples will be collected from the five borings exhibiting the highest PID readings.
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
Soil Vapor
GTA-SV-1
1-2
✓
Within former bank/office building at 615 Hillsborough Street.
Within retail area of 621 Hillsborough Street.
Within former gasoline station at 623 Hillsborough Street.
Within former gasoline station at 701 Hiillsborou h Street.
9 g
Within former office building at 11 South Boylan Avenue.
Within footprint of proposed building
GTA-SV-2
1-2
✓
GTA-SV-3
1-2
✓
GTA-SV-4
1-2
✓
GTA-SV-5
1-2
✓
GTA-SV-6
5-6
✓
Total Samples
18
18
12
6
Notes:
* indicates sample to be collected from interval with highest PID readings.
VOCs = Volatile Organic Compounds
SVOCs = Semi-Volaitle Organic Compounds
RCRA = Resource Conservation and Recovery Act
UST = Underground Storage Tank
DEQ = North Carolina Department of Environmental Quality

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.
Rev. 09/2015 Page 1 of 3

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