HomeMy WebLinkAbout24025_Crayton Printing Brownfields Assessment Work Plan 20200820
Via Email
August 20, 2020
NCDEQ – Division of Waste Management
Brownfields Program
1646 Mail Service Center
Raleigh, NC 27699-1646
Attn: Mr. Bill Schmithorst
Re: Brownfield Assessment Work Plan
Crayton Printing
Distribution Street and Dunavant Street
Charlotte, North Carolina
Brownfields Project No. 24025-20-060
H&H Project No. AKR-003
Dear Mr. Schmithorst:
On behalf of KA D&D Holdings LLC, enclosed please find a copy of the Brownfields
Assessment Work Plan prepared for the Crayton Printing Brownfields property located in
Charlotte, Mecklenburg County.
Should you have questions or need additional information, please do not hesitate to contact us at
(704) 586-0007.
Sincerely,
Hart & Hickman, PC
Matt Bramblett, PE Haley Martin, PG
Principal Assistant Project Geologist
Attachments:
cc: Mr. Dan Colith and Mr. Dan Outen, Akridge (Via Email)
Ms. Mary Katherine Stukes and Ms. Lesley Firestone, Moore & Van Allen (Via Email)
Ms. Pamela Tyrrell, Kettler (Via Email)
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Brownfields Assessment Work Plan
Crayton Printing
2301, 2321, 2327 Distribution Street and
2300, 2302, 2304, 2306 Dunavant Street
Charlotte, North Carolina
Brownfields Project No. 24025-20-060
H&H Job No. ARK-003
Table of Contents
1.0 Introduction .............................................................................................................................1
1.1 Background Information .......................................................................................................2
1.2 Previous Assessment Activities .............................................................................................2
2.0 Brownfields Assessment Activities ........................................................................................5
2.1 Receptor Survey ....................................................................................................................5
2.2 Soil Sampling Activities ........................................................................................................6
2.3 Groundwater Sampling Activities .........................................................................................8
2.4 Soil Gas Sampling Activities ...............................................................................................11
2.5 Sub-Slab Vapor Assessment Activities ...............................................................................13
2.6 Quality Assurance – Quality Control ..................................................................................15
2.7 Investigation Derived Waste ...............................................................................................16
3.0 Reporting ...............................................................................................................................17
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List of Tables
Table 1 Proposed Sample Summary Table
List of Figures
Figure 1 Site Location Map
Figure 2 Site and Surrounding Area Map
Figure 3 Proposed Sample Location Map
List of Appendices
Appendix A Brownfields Potential Receptor Survey Template
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Brownfields Assessment Work Plan
Crayton Printing
2301, 2321, 2327 Distribution Street and
2300, 2302, 2304, 2306 Dunavant Street
Charlotte, North Carolina
Brownfields Project No. 24025-20-060
H&H Job No. ARK-003
1.0 Introduction
On behalf of KA D&D Holdings LLC (Prospective Developer or PD), Hart & Hickman, PC
(H&H) has prepared this Brownfields Assessment Work Plan (Work Plan) for the Crayton
Printing Brownfields property (Brownfields Project No. [BPN] 24025-20-060) located at 2301,
2321, 2327 Distribution Street and 2300, 2302, 2304, 2306 Dunavant Street in Charlotte,
Mecklenburg County, North Carolina (subject Site or Site). The Site consists of four contiguous
parcels (Mecklenburg County Parcel Identification Nos. 12104201, 12104402, 12104203, and
12104218) totaling approximately 2.83 acres of land located in a mixed commercial and
residential area of South End Charlotte. A Site location map is provided as Figure 1, and the Site
and surrounding area are shown in Figure 2.
The northern Site parcel (2301 Distribution Street) is developed with an approximate 10,694 sq
ft office/warehouse building that is currently leased to an electrician. The western Site parcel is
developed with an approximate 12,005 sq ft office/warehouse building that is currently
unoccupied but was formerly occupied by Crayton Printing (2321 Distribution Street). The
southwestern Site parcel (2327 Distribution Street) is developed with an approximate 6,821 sq ft
office/warehouse building currently occupied by Timely Filter Supply. The eastern Site parcel
on Dunavant Street is developed with a 14,570 sq ft multi-tenant commercial building consisting
of four tenant spaces (2300, 2302, 2304, and 2306 Dunavant Street) that are currently
unoccupied.
Proposed redevelopment of the Brownfields property includes razing the existing Site buildings
and construction of an apartment building with an associated parking deck.
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1.1 Background Information
The Site consisted of a creek and undeveloped land as early as the 1930s and remained
undeveloped land until the mid-1950s when the subject Site was cleared and graded. By 1965,
rail spurs were developed in the northern and central portions of the Site. The current northern
and western commercial buildings were constructed in the late 1960s, and the current eastern
building was developed by the mid-1970s. The subject Site was utilized by various commercial
occupants from the late 1960s until present. The western Site parcel building (2321 Distribution
Street) was utilized by a printing facility that manufactured printing plates in the late 1980s and a
letter press and printing facility in the early 2000s. The buildings are currently unoccupied or are
being vacated except for an electrician located in the northern Site building and Timely Filter
Supply in the southwestern Site building (2327 Distribution Street).
1.2 Previous Assessment Activities
April 2020 Phase I ESA
In April 2020, H&H conducted Phase I ESA activities at the Site. The results of the Phase I ESA
identified the following Recognized Environmental Conditions (RECs) in connection with the
Site:
The subject Site (2321 Distribution Street) was historically occupied by various printing
and printing plate manufacturing companies, including Carolina Platemakers in the late
1980s and Crayton Printing from the early 2000s to the present. A small screen-printing
operation also occupied 2304 Dunavant St in the late 1970s to mid-1980s. Some historic
printing companies used solvent-based cleaners for printing equipment. H&H was
unable to identify the specific nature of historic on-Site printing processes. Due to the
lack of documentation for historic on-Site printing processes and high potential for such
processes to use hazardous substances, H&H considered the historical use of the Site for
printing operations to be a REC.
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The Dunavant Street Brownfields property (Brownfields Project Number 19038-15-060)
is located adjacent to the north and topographically upgradient of the subject Site. H&H
reviewed a Notice of Brownfields Property document dated February 11, 2016.
According to the document, the volatile organic compounds (VOCs) trichloroethylene
(TCE), tetrachloroethylene (PCE), benzene, cis-1,2-dichloroethene (cis-1,2-DCE), methyl
tert-butyl ether (MTBE), and naphthalene were reported in groundwater samples
collected on the Dunavant Street Brownfields property at concentrations that exceed the
NCAC 15A 2L Groundwater Quality Standards and Vapor Intrusion Screening Levels
(VISLs). September 1997 groundwater analytical data indicated the presence of VOCs
TCE, cis-1,2-DCE, benzene, and naphthalene in the closest upgradient monitoring well to
the Site (MW-1), which was located approximately 85 feet north of the Site at the former
Beta Construction facility (216 Dunavant Street). According to a 1997 groundwater
elevation map prepared for the property, the predominate groundwater flow direction on
the off-site property was from the northeast to the south-southeast (towards the Site).
Based on distance, area topography, and documented groundwater impacts at
concentrations exceeding regulatory standards in the closest monitoring well to the Site,
H&H considered the Dunavant Street Brownfields property to be a REC for the Site.
Nearby and upgradient properties have been utilized for industrial purposes since the
early 1900s. H&H reviewed a Phase II ESA Addendum dated May 29, 2008 prepared by
ERM for the Cherokee Southline, LLC Brownfields Property (aka South End Transit –
Brownfields Project Number 10036-06-60). The Brownfields Property includes 15
properties located along Dunavant Street, South Boulevard, and Hawkins Street. The
closest parcels to the Site were historically occupied by Murray Supply, Ornamental
Awnings, Floral Trends, and Southern Comfort. The primary compounds detected in
groundwater on the Brownfields Property were the chlorinated VOCs PCE and TCE.
January 2008 groundwater analytical data indicate the presence of VOCs, including TCE
above 2L Standards and VISLs, in a monitoring well situated upgradient of and less than
100 ft north-northeast of the Site. Based on area topography and documented
groundwater impacts, H&H considered The South End Transit Brownfields site to be a
REC for the Site.
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To address potential environmental concerns associated with historical on-Site and off-Site
operations, the Site was entered into the DEQ Brownfields Program and received eligibility in a
letter dated June 19, 2020. The PD elected to participate in the Brownfields Program
Redevelopment Now option. As part of this process, a kick-off/data gap meeting with PD, DEQ
Brownfields personnel, and H&H was held on August 6, 2020 to discuss prior Site history,
proposed redevelopment plans, data gaps, and the proposed schedule for completing the
Brownfields Agreement. To address data gaps and DEQ Brownfields requests for additional
assessment, H&H has prepared this Work Plan to conduct Brownfields assessment activities at
the Site.
The purpose of the Brownfields assessment activities described herein is to further evaluate the
potential for impacts at the Site for the protection of Site workers during redevelopment and for
future Site occupants. The Brownfields assessment activities discussed in the following sections
include the collection of soil, groundwater, sub-slab soil vapor, and soil gas samples. In addition
to the soil, groundwater, and soil gas assessment activities, a receptor survey will be conducted
to obtain information associated with land use, water supply well use, and potential sensitive
receptors in the area surrounding the Site. A summary of the proposed Brownfields assessment
activities is provided below.
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2.0 Brownfields Assessment Activities
The Brownfields assessment activities will be conducted in general accordance with the DEQ
Inactive Hazardous Sites Branch (IHSB) Guidelines for Assessment and Cleanup of
Contaminated Sites (Guidelines) dated January 2020, the DEQ Division of Waste Management
(DWM) Vapor Intrusion Guidance (VI Guidance) dated March 2018, and most recent versions
of the U.S. Environmental Protection Agency (EPA) Region IV Science and Ecosystem Support
Division (SESD) Field Branches Quality System and Technical Procedures guidance.
Prior to conducting the proposed assessment field activities, H&H will contact North Carolina
811, the public utility locator, to mark subsurface utilities located on the Site. H&H will also
contract with a private utility locator to screen proposed sample locations for subgrade utilities
that may not be marked by the public locator. Additionally, soil boring locations will be hand
cleared to approximately 5 ft bgs prior to use of mechanical drilling equipment to further screen
the boring locations for the presence of subsurface utilities.
In accordance with Mecklenburg County rules, H&H will also obtain a Subsurface Investigation
Permit (SIP) from Mecklenburg County prior to temporary monitoring well installation and
sampling. After completion of the activities, H&H will update the SIP on the Mecklenburg
County Well Information database with temporary monitoring well abandonment records
provided by a North Carolina licensed driller.
2.1 Receptor Survey
H&H will perform a Brownfields receptor survey in accordance with DEQ Brownfields Section
guidance. The receptor survey will include information about land use in the Site area including
zoning. H&H will also conduct a field search for water supply wells, basements, utility
manways and chases, storm sewers, other underground utilities, drains, and surface water within
a 1,500 ft radius of the Brownfield property boundary. In addition, H&H will review the online
Mecklenburg County Well Information System for potential wells in the area and, if warranted,
contact utility companies for information concerning underground utilities in the immediate area
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of the Site. The receptor survey will be completed using the most current version of the
Brownfields Property Receptor Survey template form. An example copy of the Brownfields
Property Receptor Survey template form is provided in Appendix A.
2.2 Soil Sampling Activities
H&H will conduct soil sampling as part of the Brownfields assessment activities. The purpose
of the soil sampling is to evaluate for potential impacts in areas of potential environmental
concern and in areas that may be disturbed during planned redevelopment and grading activities.
The soil sampling will include advancement of eight (8) soil borings to a depth of approximately
10 ft below ground surface (bgs) for collection of eight (8) soil samples for laboratory analysis.
In addition, two (2) soil borings will be advanced to an approximate depth of 5 ft bgs adjacent to
filled concrete areas (a potential sump inside and a concrete pad abutting the back of the
building) identified at the northern Site building for collection of 2 grab samples for laboratory
analysis. Locations of the proposed soil borings are shown on Figure 3, and the soil sample
depths, objectives, and laboratory analyses are summarized in Table 1. A description of the soil
sampling activities is provided below.
H&H will team with a qualified drilling contractor to advance soil borings at the Site. During
boring advancement, soil will be logged for lithological description and field screened for
indication of potential impacts by observation for obvious staining, unusual odors, and the
presence of volatile organic vapors using a calibrated photoionization detector (PID). Soil
samples will be collected from the depth interval that exhibits the highest potential for impact or
as described below. A description of the soil sampling activities proposed for each area of
interest is provided below.
Four soil borings (SB-1 through SB-4) will be advanced to a depth of approximately 10 ft
bgs within the proposed building footprint or proposed vehicle access areas located in the
northern and western portions of the Site. Soil boring locations SB-1 and SB-2 will be
advanced as part of the groundwater and soil gas sampling activities described further in
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Section 2.3 and Section 2.4 below, respectively. Based upon field observations, one soil
sample will be collected from each boring for laboratory analysis from the depth interval
with the highest potential for impacts. Unless obvious impacts are observed at depth
during field screening, a sample will be collected from shallow soil (i.e., no greater than 2
ft bgs).
One soil boring (SB-5) will be advanced to a depth of approximately 10 ft bgs within the
proposed building footprint located in the central portion of the Site as part of the soil gas
sampling activities described further in Section 2.4. Soil boring SB-5 is also located
adjacent to the former railroad tracks located in the central portion of the Site. Based
upon field observations, one soil sample will be collected from the boring for laboratory
analysis from the depth interval with the highest potential for impacts. Unless obvious
impacts are observed at depth during field screening, a sample will be collected from
shallow soil (i.e., no greater than 2 ft bgs).
Two soil borings (SB-6 and SB-7) will be advanced to a depth of approximately 10 ft bgs
behind buildings that were historically occupied by printing operations (2321 Distribution
Street and 2304 Dunavant Street). The borings will be advanced as part of the
groundwater and soil gas sampling activities described further in Section 2.3 and Section
2.4 below, respectively. Based upon field observations, one soil sample will be collected
from each boring for laboratory analysis from the depth interval with the highest potential
for impacts. Unless obvious impacts are observed at depth during field screening, a
sample will be collected from shallow soil (i.e., no greater than 2 ft bgs).
One soil boring (SB-8) will be advanced to a depth of approximately 10 ft bgs within the
proposed green space located in the eastern portion of the Site as part of the groundwater
sampling activities described in Section 2.3. Based upon field observations, one soil
sample will be collected from the boring for laboratory analysis from the depth interval
with the highest potential for impacts. Unless obvious impacts are observed at depth
during field screening, a sample will be collected from shallow soil (i.e., no greater than 2
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ft bgs).
Two soil borings (SB-9 and SB-10) will be advanced near filled concrete structures
identified at the northern Site building (2301 Distribution Street). Borings will be
advanced to 5 ft bgs and a soil sample will be collected from a depth interval interpreted
to be below the base of the concrete structures (near 2 ft bgs).
The soil samples selected for laboratory analysis will be placed in dedicated laboratory supplied
sample containers, labeled with the sample identification, date, and requested analysis, and
placed in a laboratory supplied cooler with ice. The samples will be delivered to a North
Carolina certified laboratory under standard chain of custody protocols for laboratory analysis.
Soil samples will be analyzed for VOCs by EPA Method 8260, semi-VOCs by EPA Method
8270, Resource Conservation and Recovery Act (RCRA) metals by EPA Methods 6020/7471,
and hexavalent chromium by EPA Method 7199. In addition, the soil sample collected from soil
boring SB-6 will be submitted for laboratory analysis of polychlorinated biphenyls by EPA
Method 8082. Metal concentrations will be compared to background concentrations reported in
the literature and at nearby other Brownfields sites.
Following sampling activities, the soil borings will be properly abandoned and the surfaces will
be repaired similar to pre-drilling conditions. Additionally, the soil sample locations will be
estimated using a hand held global positioning system (GPS) unit.
2.3 Groundwater Sampling Activities
H&H will contract a qualified drilling contractor to advance borings for installation of four (4)
temporary groundwater monitoring wells at the Site. The purpose of the temporary groundwater
monitoring wells will be to evaluate for the presence of potential groundwater impacts from on-
Site and nearby off-Site sources. The locations of the proposed temporary monitoring wells are
shown on Figure 3 and are described below.
One temporary monitoring well (TMW-1) will be installed in the northern portion of the
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Site topographically downgradient of the Dunavant Street Brownfields property
(Brownfields Project Number 19038-15-060) which is located adjacent to the north and
topographically upgradient of the subject Site;
One temporary monitoring well (TMW-2) will be installed in the northeastern portion of
the Site and in a topographically upgradient area of the Site;
One temporary monitoring well (TMW-3) will be installed in the southcentral portion of
the Site in the vicinity of the Crayton Printing facility; and
One temporary monitoring well (TMW-4) will be installed in the eastern portion of the
Site topographically downgradient of the Cherokee Southline, LLC Brownfields Property
(aka South End Transit – Brownfields Project Number 10036-06-60) which is located
adjacent to the east and topographically upgradient of the subject Site.
The temporary groundwater monitoring well borings will be advanced with a track-mounted drill
rig capable of utilizing hollow-stem auger drilling techniques. During drilling, soil cuttings will
be collected and logged for lithologic description and field screened for the presence of obvious
staining, unusual odors, and elevated volatile organic vapors using a calibrated PID. Should
obvious evidence of impacts be observed based on field screening results, a soil sample will be
collected for laboratory analysis using the methodologies described in Section 2.2 above.
The temporary groundwater monitoring wells will be constructed of 1-inch diameter PVC with a
10 to 15 ft section of well screen set to bracket the water table and 1-inch diameter PVC well
casing to the ground surface. A sand filter pack will be placed from the bottom of the borings to
approximately 2 ft above the top of the well screens. The temporary wells will be completed by
placing a minimum of an approximately 2 ft thick hydrated bentonite seal above the sand filter
pack.
Once the temporary monitoring wells are installed, the wells will be allowed to equilibrate to
static condition, and a decontaminated electronic water level indicator will be used to measure
the depth to the water table relative to the ground surface and tops of well casings in each well.
The wells will then be developed by removing a minimum of 3 to 5 volumes and until field
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parameters have stabilized (pH± 0.1 Standard Units [SU] and conductivity varies no more than
5%).
After development, groundwater samples will be collected utilizing low flow/low stress purging
techniques using a peristaltic pump and dedicated polyethylene tubing. The intake point of the
pump tubing will be placed in the approximate mid-portion of the screened interval of the well,
and groundwater will be removed at a rate no greater than 200 milliliters per minute. H&H will
utilize a calibrated water quality meter to collect measurements of pH, temperature, dissolved
oxygen, oxidation reduction potential, turbidity, and specific conductivity at three to five-minute
intervals during the purging process. Purging will be considered complete when the field
parameters stabilize (pH ± 0.1 SU, conductivity varies no more than 5%, and turbidity is less
than 10 Nephelometric Turbidity Units [NTUs]), if practical.
Once groundwater parameters stabilize, groundwater samples for VOC analysis will be collected
directly into laboratory supplied sample containers using the “soda straw” method to eliminate
the potential for volatile compound loss through the pump head. Samples collected for the
remaining analyses will be collected directly into laboratory supplied sample containers from the
dedicated sample tubing discharge. The sample containers will be labeled with the sample
identification, date, time, and requested analysis, and placed in a laboratory supplied cooler with
ice. The groundwater samples will be delivered to a North Carolina certified laboratory under
standard chain of custody protocols for analyses of VOCs by EPA Method 8260, SVOCs by
EPA Method 8270, and RCRA metals by EPA Method 6020/7471.
Following sample collection, H&H will utilize surveying techniques to estimate the top of casing
elevation and ground surface elevation at each temporary monitoring well. H&H will use the
measured depths to groundwater and the survey estimates to estimate the groundwater flow
direction across the Site. In addition, the groundwater sample locations will be estimated using a
hand-held GPS unit. Following sampling and surveying activities, the temporary monitoring
wells will be properly abandoned by a licensed well driller, and the surfaces will be repaired
similar to pre-drilling conditions.
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2.4 Soil Gas Sampling Activities
To evaluate the potential for structural vapor intrusion into the proposed apartment building,
H&H will install seven (7) temporary soil gas monitoring points at the Site. The seven soil gas
monitoring points (SG-1 through SG-7) will be installed within the footprint of the residential
and amenity spaces of the proposed apartment building. The locations of the temporary soil gas
monitoring points are shown on Figure 3.
The soil gas monitoring points will be installed at depths greater than 5 ft bgs and just above the
capillary fringe of the water table. Based on the anticipated depth to water at the Site (10 ft to 15
ft bgs). the soil gas points will be installed to a depth of approximately 5.5 to 12 ft bgs. The soil
gas points will be installed utilizing a track-mounted drill rig capable of using direct push
technology (DPT) drilling techniques to advance an approximate 6-inch stainless steel vapor
screen attached to Teflon® tubing. Following advancement, the DPT tooling will be retracted
and the annular space around the vapor screen will be filled with filter sand to a depth of
approximately 6-inches above the vapor screen. Following installation of the sand, hydrated
bentonite will be installed in the boring from the top of the sand to near the ground surface.
The soil gas samples will be collected utilizing laboratory supplied Summa® canisters (1 or 3-
Liter canisters depending on laboratory availability) connected to an air-flow regulator calibrated
by the laboratory to collect the soil gas sample at a rate of approximately 100 ml/min. Prior to
collection of the soil gas samples, a “shut-in” test will be conducted on the sampling train and
helium leak checks will be conducted at each soil gas sampling point. The purpose of the shut-in
test and helium leak check will be to ensure that short circuiting with ambient air does not occur
during sampling. A description of the shut-in test and helium leak testing procedures is provided
below.
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The shut-in test will be conducted by connecting the flow regulator with the vacuum gauge to the
Summa® canister and sealing the flow regulator with the laboratory provided brass cap. Once
the sampling train is “closed”, the sample valve on the Summa® canister will be opened and the
reading on the vacuum gauge will be recorded. The Summa® canister sample valve will then be
closed and the vacuum gauge will be observed to ensure no vacuum loss occurs. If the vacuum
reading remains the same, the shut-in test will be considered successful. If vacuum loss occurs,
the flow regulator and/or brass cap will be reseated and the shut-in test will be repeated until the
vacuum reading remains stable.
Following the shut-in test, the Summa® canister will be connected to the sample point via
Teflon® sample tubing using a brass nut and ferrule assembly to create an air tight seal and the
leak check will be performed. The leak check will be performed by constructing a shroud over
the sampling train, including the canister, and flooding the shroud with helium gas. A calibrated
helium gas detector will be utilized to measure helium concentrations within the shroud. Once
helium concentrations stabilize within the shroud, the sample tubing will be purged outside of
the shroud using a syringe and a three-way valve to collect purged soil gas into a Tedlar® bag.
The purged soil gas will then be analyzed using the helium gas detector to ensure that helium
concentrations in the soil gas point are less than 10% of the helium concentrations measured
within the shroud.
Following successful leak checks, the soil gas samples will be collected. Vacuum readings on
the Summa® canister will be recorded prior to and following the sampling period to ensure
adequate sample volume was collected. A vacuum will be maintained within the canisters at the
conclusion of the sampling event.
Following sample collection, the Summa® canisters will be placed in laboratory supplied
shipping containers, properly labeled and shipped under standard chain-of-custody protocols to a
qualified laboratory for analysis of VOCs by EPA Method TO-15. The laboratory will be
requested to use reporting limits that are below DEQ DWM Residential Soil Gas Screening
Levels (SGSLs). The sample locations will be estimated using a hand-held GPS unit and the soil
gas monitoring points will be abandoned and the surfaces will be repaired similar to pre-drilling
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conditions.
2.5 Sub-Slab Vapor Assessment Activities
H&H proposes to collect five sub-slab vapor samples (SS-1 through SS-5) through the slabs of
the existing Site buildings. Two sample points (SS-1 and SS-2) will be installed within the
parking deck area of the proposed redevelopment. Three sample points (SS-3 through SS-5) will
be installed in proposed residential or amenity units of the proposed apartment building. The
proposed sub-slab vapor sample locations are shown on Figure 3.
The sampling points will be installed using a rotary hammer drill and 1½-inch diameter drill bit
to advance a pilot hole into the concrete slab to a depth of approximately 1¾ inches below the
surface. A drill guide will then be placed in the pilot hole, and a 5/8-inch diameter drill bit will
be utilized to advance the boring through the concrete slab. Following concrete borehole
advancement, loose concrete cuttings will be removed from each boring, and a Cox-Colvin
Vapor Pin™ (vapor pin) assembly (brass sampling point and silicone sleeve) will be seated in the
borehole using an installation/extraction tool and hammer.
The sub-slab vapor samples will be collected utilizing laboratory supplied Summa® canisters (1
or 3-Liter canisters depending on laboratory availability) connected to an air-flow regulator
calibrated by the laboratory to collect the soil gas sample at a rate of approximately 100 ml/min.
Prior to collection of the soil gas samples, a “shut-in” test will be conducted on the sampling
train and helium leak checks will be conducted at each soil vapor sampling point. The purpose
of the shut-in test and helium leak check will be to ensure that short circuiting with ambient air
does not occur during sampling. A description of the shut-in test and helium leak testing
procedures is provided below.
The shut-in test will be conducted by connecting the flow regulator with the vacuum gauge to the
Summa® canister and sealing the flow regulator with the laboratory provided brass cap. Once
the sampling train is “closed”, the sample valve on the Summa® canister will be opened and the
reading on the vacuum gauge will be recorded. The Summa® canister sample valve will then be
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closed and the vacuum gauge will be observed to ensure no vacuum loss occurs. If the vacuum
reading remains the same, the shut-in test will be considered successful. If vacuum loss occurs,
the flow regulator and/or brass cap will be reseated and the shut-in test will be repeated until the
vacuum reading remains stable.
Following the shut-in test, the Summa® canister will be connected to the sample point via
Teflon® sample tubing using a brass nut and ferrule assembly to create an air tight seal and the
leak check will be performed. The leak check will be performed by constructing a shroud over
the sampling train, including the canister, and flooding the shroud with helium gas. A calibrated
helium gas detector will be utilized to measure helium concentrations within the shroud. Once
helium concentrations stabilize within the shroud, the sample tubing will be purged outside of
the shroud using a syringe and a three-way valve to collect purged soil gas into a Tedlar® bag.
The purged soil vapor will then be analyzed using the helium gas detector to ensure that helium
concentrations in the soil gas point are less than 10% of the helium concentrations measured
within the shroud.
Following successful leak checks, the sub-slab vapor samples will be collected. Vacuum
readings on the Summa® canister will be recorded prior to and following the sampling period to
ensure adequate sample volume was collected. A vacuum will be maintained within the
canisters at the conclusion of the sampling event.
Following sample collection, the Summa® canisters will be placed in laboratory supplied
shipping containers, properly labeled and shipped under standard chain-of-custody protocols to a
qualified laboratory for analysis of VOCs by EPA Method TO-15. The laboratory will be
requested to use reporting limits that are below DEQ DWM Residential SGSLs.
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Following the collection of the sub-slab vapor samples, the vapor pins will be left in place for
potential future sampling. Each sample location will be estimated by measuring from known
benchmarks within the buildings (e.g. doors, windows, exterior walls, etc.).
2.6 Quality Assurance – Quality Control
Non-dedicated equipment and tools will be decontaminated prior to use at each boring or
sampling location or following exposure to soil or groundwater. The following samples will be
collected for quality assurance/quality control (QA/QC) purposes:
One duplicate soil and groundwater sample will be collected and analyzed for the same
parameters as the parent samples.
One trip blank will accompany the groundwater samples during the field activities as well
as during sample shipment and will be analyzed for VOCs by EPA Method 8260.
One duplicate soil gas sample will be collected using a laboratory supplied “t-fitting”
which allows for two soil gas samples to be collected from one soil gas monitoring point
simultaneously. The duplicate soil gas sample will be submitted for analysis of VOCs by
EPA Method TO-15.
Laboratory QA/QC procedures will be employed to ensure appropriate sample handling and
analysis and to aid in the review and validation of the analytical data. QA/QC procedures will be
conducted in accordance with the method protocols and will include regular equipment
maintenance, equipment calibrations, and adherence to specific sample custody and data
management procedures. Samples will be analyzed in conjunction with appropriate blanks,
laboratory duplicates, continuing calibration standards, surrogate standards, and matrix spiking
standards in accordance with approved methodologies to monitor both instrument and analyst
performance. Laboratory reporting limits for each analyte will be at or below appropriate
screening criteria, where possible. Additionally, H&H will request that the laboratory include
estimated concentrations for compounds that are detected at levels above the laboratory method
detection limit, but below the laboratory reporting limit (J flags).
The laboratory analytical data report and QA package for each group of samples submitted to
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and analyzed by the subcontracted laboratory will be provided in an appendix to the final report.
Laboratory QA data consistent with Level II documentation will be provided for this project.
A copy of the completed chain of custody record will be appended to the corresponding
laboratory analytical report included with the final report.
2.7 Investigation Derived Waste
Investigation derived waste (IDW) generated during the proposed assessment activities will be
managed in general accordance with DEQ IHSB Guidelines. IDW generated during the
assessment activities will be thin spread on-Site. However, if significant impacts are suspected
(i.e., free-product) the soil cuttings will be containerized in labeled 55-gallon drums and staged
on-Site pending analytical results of a composite IDW sample. Based on laboratory analytical
results of IDW samples, the drums will be transported off-Site to a suitable facility for disposal.
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3.0 Reporting
Following completion of the assessment activities and receipt of the analytical data, H&H will
document our findings in a Brownfields Assessment Report. The report will include a
description of the sampling activities; a figure depicting sample locations; boring logs for the soil
borings, temporary well borings, and soil gas monitoring points; temporary well and soil gas
monitoring point construction logs; groundwater sampling logs, laboratory analytical data; a
discussion of the data in comparison to regulatory screening levels; and conclusions and
recommendations concerning our activities. For the soil gas results, H&H will use the most
recent version of the NC DEQ risk calculator to further evaluate potential risks based on the data,
if needed. The report will also include the firm license number and an individual professional
seal and signature.
Table 1Proposed Sample Summary TableCrayton Printing Charlotte, North Carolina Brownfields Project No. 24025-20-060H&H Project No. AKR-003SB-1 through SB-8 1Soil Evaluate Soil Conditions 10 varies 8VOCs (8260), SVOCs (8270), RCRA Metals (6020/7471), and hexavalent chromium (7199)SB-9 and SB-10 SoilEvaluate Soil Conditions Near Filled Concrete Areas5 0.5-2 2VOCs (8260), SVOCs (8270), RCRA Metals (6020/7471), and hexavalent chromium (7199)TMW-1 through TMW-4 Groundwater Evaluate Groundwater Conditions 20 5-20 4VOCs (8260), SVOCs (8270), and RCRA Metals (6020/7471)SS-1 through SS-5 Sub-Slab Vapor below slab below slab 5 VOCs (TO-15)SG-1 through SG-7 Soil Gas 5.5-12 varies 7 VOCs (TO-15)SB-DUP Soil 10 varies 1VOCs (8260), SVOCs (8270), RCRA Metals (6020/7471), and hexavalent chromium (7199)GW-DUP Groundwater 20 5-20 1VOCs (8260), SVOCs (8270), and RCRA Metals (6020/7471)SGP-DUP Soil Gas 5.5-12 vaires 1 VOCs (TO-15)Trip Blank Trip Plank NA NA 1 VOCs (8260)Notes:1 = The soil sample collected from soil boring SB-6 will be submitted for laboratory analysis of polychlorinated biphenyls by EPA Method 8082. EPA Method Number Follows Laboratory Parameter in ParenthesisVOCs = Volatile Organic Compounds; SVOCs = Semi-VOCs; RCRA = Resource Conservation and Recovery Actft = feet; QA/QC = Quality Assurance/ Quality Control; VI = Vapor Intrusion; NA = Not ApplicableSample IDsApproximate Boring Depth (ft)Number of SamplesLaboratory AnalysisSample ObjectiveSample TypeApproximate Sample Depth (ft)QA/QCEvaluate Potential VI RisksS:\AAA‐Master Projects\Akridge\AKR.003 Dunavant Brownfields\Work Plan\Sample Summary Table_20200219Table 1 (Page 1 of 1)Hart & Hickman, PC
USGS The National Map: National Boundaries Dataset, 3DEP ElevationProgram, Geographic Names Information System, National HydrographyDataset, National Land Cover Database, National Structures Dataset,and National Transportation Dataset; USGS Global Ecosystems; U.S.Census Bureau TIGER/Line data; USFS Road Data; Natural Earth Data;U.S. Department of State Humanitarian Information Unit; and NOAANational Centers for Environmental Information, U.S. Coastal ReliefModel. Data refreshed February, 2020.
SITE LOCATION MAP
CRAYTON PRINTING2300, 2302, 2304, 2306 DUNAWANT STREET AND2301, 2321, 2327 DISTRIBUTION STREETCHARLOTTE, NORTH CAROLINA
REVISION NO: 0
FIGURE NO: 1
2923 South Tryon Street - Suite 100Charlotte, North Carolina 28203704-586-0007 (p) 704-586-0373 (f)License # C-1269 / # C-245 Geology
0 2,000 4,000
SCALE IN FEET
SITE
N
U.S.G.S. QUADRANGLE MAP
CHARLOTTE EAST, NORTH CAROLINA 2013
QUADRANGLE7.5 MINUTE SERIES (TOPOGRAPHIC)DATE: 8-12-20
JOB NO. AKR-003
!(T!(T!(T
³±D
SITE AND SURROUNDING AREA MAP
CRAYTON PRINTING2300, 2302, 2304, 2306 DUNAWANT STREET AND2301, 2321, 2327 DISTRIBUTION STREETCHARLOTTE, NORTH CAROLINA
REVISION NO: 0
FIGURE NO: 2
2923 South Tryon Street - Suite 100Charlotte, North Carolina 28203704-586-0007 (p) 704-586-0373 (f)License # C-1269 / # C-245 Geology
0 75 150
SCALE IN FEET
N
DATE: 8-12-20
JOB NO. AKR-003
WORLD STONE FABRICATOR(2300 DISTRIBUTION STREET)
GRASS
DU
N
A
V
A
N
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S
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DISTRIBUTION STREETLEGEND
BROWNFIELDS PROPERTY BOUNDARY
PARCEL BOUNDARY LINE
!(T POLE-MOUNTED TRANSFORMER
³± ³D FORMER DUMPSTER AREA
NOTE:
1. BASE DATA OBTAINED FROM MECKLENBURGCOUNTY GIS, 2019.
DUNAVANT STREET BROWNFIELDS SITE(2250 HAWKINS STREET)(NCBP NO. 19038-15-060)Path: \\HHFS01\Redirectedfolders\sperry\My Documents\ArcGIS\PROJECTS\AKR-003\FIGURE 2.mxdHAWKINS STREETMULTI-TENANT RESIDENTIAL(1606-1632 MAINLINE BOULEVARD)(NCBP NO. 10036-06-060)
CHARLOTTE GRILL(2322 DISTRIBUTION STREET)
PET WANTS(2322 DISTRIBUTION STREET)
GRIER INTERIORS(2326 DISTRIBUTION STREET)
!(T !(T
!(T!(T
!(T³±D³±DELECTRICIAN(2301 DISTRIBUTION STREET)
VACANT(2321A DISTRIBUTION STREET)
FORMER CRAYTON PRINTING(2321B&C DISTRIBUTION STREET)
VACANT(2300 DUNAVANT STREET)
VACANT(2302 DUNAVANT STREET)
VACANT(2304 DUNAVANT STREET)
VACANT(2306 DUNAVANT STREET)
TIMELY FILTER SUPPLY(2327 DISTRIBUTION STREET)
THE DUNAVANT(2322 DUNAVANT STREET)
VACANT COMMERCIAL(2322 DUNAVANT STREET)
CONCRETECUTOUT
THE PARKER BUILDING(2401 DISTRIBUTION STREET)
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SG-2
SG-3
SG-4
SG-7
SG-1/SB-2
SG-5/SB-5
SG-6/SB-7
TMW-1/SB-1
TMW-3/SB-6
TMW-4/SB-8
SB-3
SB-4
SB-9
SB-10
TMW-2
PROPOSED SAMPLE LOCATION MAP
CRAYTON PRINTING2300, 2302, 2304, 2306 DUNAWANT STREET AND2301, 2321, 2327 DISTRIBUTION STREETCHARLOTTE, NORTH CAROLINA
REVISION NO: 0
FIGURE NO: 3
2923 South Tryon Street - Suite 100Charlotte, North Carolina 28203704-586-0007 (p) 704-586-0373 (f)License # C-1269 / # C-245 Geology
0 75 150
SCALE IN FEET
N
DATE: 8-12-20
JOB NO. AKR-003
DUNAVANT STREET
DISTRIBUTION STREETNOTE:
1. BASE DATA OBTAINED FROM MECKLENBURG COUNTY GIS, 2020.Path: \\HHFS01\Redirectedfolders\sperry\My Documents\ArcGIS\PROJECTS\AKR-003\FIGURE 3.mxdHAWKINS STREETPROPOSEDCOURTYARD
PROPOSEDPARKING DECK
LEGEND
BROWNFIELDS PROPERTY BOUNDARY
PARCEL BOUNDARY LINE
PROPOSED BUILDING FOOTPRINT
PROPOSED RESIDENTIAL
PROPOSED SERVICE OR AMENITY
!PROPOSED SOIL BORING
"¬PROPOSED SOIL GAS SAMPLE
"D PROPOSED CO-LOCATED SOIL GAS SAMPLEAND SOIL BORING
#PROPOSED SUB-SLAB SOIL VAPOR SAMPLE
Ñ!!PROPOSED TEMPORARY MONITORING WELL
"GÑ PROPOSED CO-LOCATED TEMPORARYMONITORING WELL AND SOIL BORING
PROPOSED PARKING DECK
Appendix A
Brownfields Potential Receptor Survey Template
North Carolina Department of Environmental Quality
Division of Waste Management
Brownfields Program
Site:
Address:
City:
County:
Brownfields Project Number:
Date
Property and Building Characteristics
a. Provide occupancy and use information.
c. Describe the foundation construction. Include details on type, floor construction, and depth below grade.
e. Are any subslab ventilation systems or moisture barriers in place? If so, please provide details.
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.
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).
% of property that is covered by buildings
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).
Current Usage Proposed UsageSurface Conditions
% of property that is grassed areas
% of property that is agricultural crops
% of property that is paved
NASize of Property (acres)
% of property that is wooded/brush
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?).
Rev. 09/2015 Page 1 of 3
North Carolina Department of Environmental Quality
Division of Waste Management
Brownfields Program
Surrounding Property Land Use
North
South
East
West
Utilities
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.
Is there a residence within 1,000 ft of the Property?
Utility/Potential Receptor
Is a buried electrical cable main within 100 ft of Property boundary?
Is a storm water pipe within 100 ft of the Property boundary?
Is a sanitary sewer within 100 ft of the Property boundary?
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.
Y/N *
Is a school or daycare center within 1,000 ft of the Property?
Specific Land Uses of Interest Y/N *
* If numerous facilities of interest are present, their locations can be placed on a map in lieu of providing specific
addresses.
Distance
(ft)
* If yes, please provide a map or detailed information (distance, direction, depth) of the utility in correlation with
the subject property.
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 septic system leach field within 500 ft of the Property boundary?
Direction
Is there a basement within 1,000 ft of the Property
DirectionDistance
(ft)Address
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 Proposed Usage Current Use/Occupant
Rev. 09/2015 Page 2 of 3
North Carolina Department of Environmental Quality
Division of Waste Management
Brownfields Program
Water Supply
What is the potable water supply for the property? Public ______ Private ______
Surface Water & Wetlands
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?
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
boundary?Is an irrigation well within 1,500 ft of the Property boundary?
Response/Comments
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.
The purpose of this section is to provide information on the water supply for the site and surrounding areas.
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.
a. Is the water body naturally developed or
man-made?
Are there surface water features on the
property? (If yes, please complete a. to d.)
Provide Information regarding Surface Water
and Wetlands
Distance
(ft)Direction AddressY/NWater Supply Wells
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.
Rev. 09/2015 Page 3 of 3