HomeMy WebLinkAbout25071_Patterson Ave_BFAssessment WP and Approval Letter_20220425
April 25, 2022
Sent Via E-mail David Vogel Two Cities Church, Inc. 854 W. Northwest Boulevard
Winston-Salem, NC 27101 david@twocitieschurch.net Subject: Brownfields Assessment Work Plan Approval Patterson Ave Brownfields Project
Winston-Salem, Forsyth County Brownfields Project Number 25071-21-034 Dear Mr. Vogel,
The North Carolina Department of Environmental Quality (DEQ) Brownfields Program received and reviewed the Brownfields Assessment Work Plan Revision 1.0 dated April 21, 2022, submitted by ECS Limited for the above referenced site. Based on our review, the Brownfields Assessment Work Plan Revision 1.0 is approved.
Be advised that this approval from the Brownfields Program does not waive any applicable requirement to obtain any necessary permits, licenses, or certifications for the above referenced activities nor does it waive any requirement to comply with applicable law for such activities. If you have any questions, please feel free to contact me via e-mail at peter.doorn@ncdenr.gov.
Sincerely,
Peter L. Doorn
Brownfields Project Manager ec: Scott Young, ECS Southeast LLP Scott Werley, ECS Southeast LLP Rick Reich, Kilpatrick Townsend & Stockton, LLP
Steve Berlin, Kilpatrick Townsend & Stockton, LLP Pam McDaniel, Kilpatrick Townsend & Stockton, LLP Tracy Wahl, DEQ Brownfields Program
BROWNFIELDS ASSESSMENT WORK PLAN
REVISION 1.0
PATTERSON AVENUE PROPERTY
0/1111/1115/1119/1033 N. PATTERSON AVE., PORTION OF 1201
PATTERSON AVE., 0/1008/1014 IVY AVE., & 0/317/325/403 E. TENTH ST.
WINSTON-SALEM, FORSYTH COUNTY, NORTH CAROLINA
ECS PROJECT NO.: 49:14631-A
BROWNFIELDS PROJECT ID: 25071-21-034
PREPARED FOR
TWO CITIES CHURCH, INC.
SUBMITTED: April 21, 2022
Brownfields Assessment Work Plan, Revision 1.0
Patterson Avenue Property
Brownfields Project ID: 25071-21-034
ECS Project No. 49:14631-A
April 21, 2022
TABLE OF CONTENTS
1.0 INTRODUCTION .......................................................................................................................... 1
2.0 SCOPE OF WORK ......................................................................................................................... 3
2.1 Soil Gas Probe Installation and Sampling ............................................................................. 3
2.2 Sub-Slab Soil Vapor Sampling .............................................................................................. 4
2.3 Soil Boring and Sample Collection ....................................................................................... 5
2.4 Dripline Soil Sampling .......................................................................................................... 6
2.5 Temporary Monitoring Well Installation and Groundwater Sampling ................................ 6
2.6 Quality Control/Quality Assurance Sampling ...................................................................... 8
2.7 Deviation from Approved Plan............................................................................................. 8
3.0 RECEPTOR SURVEY ..................................................................................................................... 8
4.0 INVESTIGATIVE DERIVED WASTE ................................................................................................ 8
5.0 REPORTING ................................................................................................................................. 9
FIGURES
Figure 1 USGS Topographic Map
Figure 2 Proposed Sample Locations Aerial Map
Figure 2A Proposed Sample Locations Development Map
TABLE
Table 1 Proposed Samples & Analysis
APPENDIX
Appendix A NCDEQ Brownfields Property Receptor Survey/Checklist
Brownfields Assessment Work Plan, Revision 1.0
Patterson Avenue Property
Brownfields Project ID: 25071-21-034
ECS Project No. 49:14631-A
April 21, 2022
1
1.0 INTRODUCTION
The project site is an approximate 9.31-acres in size and consists of parcels having the addresses of a
portion of 1201 N. Patterson Ave., 1119 N. Patterson Ave., 1115 N. Patterson Ave., 1111 N. Patterson
Ave., two unnumbered parcels along N. Patterson Ave., 1033 N. Patterson Ave., 325 E. Tenth St., 317 E.
Tenth St., four unnumbered parcels along E. Tenth St., 403 E. Tenth St., five unnumbered parcels along
Ivy Ave., 1008 Ivy Ave., and 1014 Ivy Ave. in Winston-Salem, Forsyth County, North Carolina. (Figure 1).
According to the Forsyth County Geographic Information System website, the identification numbers for
the parcels are a portion of 6836-30-4736, 6836-30-3608, 6836-30-3612, 6836-30-3517, 6836-30-2570,
6836-30-3267, 6836-30-3317, 6836-30-2068, 6836-30-3089, 6836-30-4156, 6836-30-5440, 6836-30-7169,
6836-30-7279, 6836-30-4277, 6836-30-9119, 6836-30-9312, 6836-30-6484, 6836-30-6435, 6836-30-5485,
6836-30-9215, and 6836-30-9218. The site property generally consists of vacant buildings and
undeveloped land.
Landmark Builders (Landmark) provided ECS with several reports and documents prepared by others for
the subject site including:
• Report of Limited Soil and Groundwater Assessment, from Progress Environmental, Inc.
(Progress), dated November 3, 2014
• Geophysical Investigation, from Geo Solutions, Ltd. (Geo), dated December 16, 2014
• Transformer Substation Soil Abatement, from S&ME, Inc., (S&ME), dated January 11, 2017
• Phase I Environmental Site Assessment, from Pilot Environmental, Inc. (Pilot), dated March 23,
2021
According to Progress’s Report of Limited Soil and Groundwater Assessment dated November 3, 2014, a
Phase I Environmental Site Assessment (Phase I ESA) was previously conducted by Pilot for a portion of
the subject site. The Pilot Phase I ESA indicated the following on-site recognized environmental conditions
(RECs):
• The historical use of portions of the property as furniture and mirror factories; and,
• Limited information, or information that is difficult to discern, pertaining to the prior underground
storage tank (UST) removal activities.
Progress conducted soil and groundwater sampling to assess the RECs identified in the Phase I ESA in
October 2014 by advancing soil borings, installing temporary monitoring wells, examining subsurface
materials, and collecting and analyzing soil and groundwater samples. Progress’s results and findings are
summarized in the Limited Soil and Groundwater Assessment Report dated November 3, 2014. Analysis
of soil samples collected during this assessment indicated concentrations of Total Petroleum Hydrocarbon
– Diesel Range Organics (TPH-DRO) greater than the State Action Level and semi-volatile organic
compounds (SVOCs) greater than their respective Soil to Water Maximum Soil Contaminant
Concentrations (MSCCs) and Inactive Hazardous Sites Branch (IHSB) Soil Remediation Goals (SRGs).
Concentrations of total chromium were also identified at the site at concentrations greater than the
hexavalent chromium IHSB SRG, but less than the trivalent chromium IHSB SRG. Progress considered these
detections most likely trivalent chromium as they were comparable to the background total chromium
concentrations detected. Analysis of the groundwater samples collected during this assessment indicated
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Patterson Avenue Property
Brownfields Project ID: 25071-21-034
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concentrations of volatile organic compounds (VOCs) and SVOCs greater than their respective North
Carolina 2L Groundwater Quality Standard (NC2LGWQS) and Vapor Intrusion Screening Levels (VISLs).
A geophysical survey was conducted by Geo on October 15, 2014, for a portion of the subject site as
documented in Geo’s report dated December 16, 2014. According to Geo’s report, evidence of USTs was
not identified at the site.
S&ME performed soil excavation and sampling activities on June 28, 2016, at two transformer substations
located on the subject property as documented in S&ME’s Transformer Substation Soil Abatement report
dated January 11, 2017, but outside of the Patterson Avenue Brownfields Property Boundary. As
documented in S&ME’s report, soils containing concentrations of TPH-DRO greater than the North
Carolina Department of Environmental Quality (NCDEQ) Action Level remained following the excavation
activities at each of the two transformer substations.
As documented in Pilot’s report dated March 23, 2021, a Phase I ESA was completed for the subject site.
According to this Phase I ESA, it appeared the site contained several single-family residences from at least
1895 until most were periodically demolished by 2015. One vacant single-family residence and two vacant
commercial structures remained at the time of site visit. Beginning at some point prior to 1950, areas on
the northern portion of the site were utilized by a furniture manufacturer for storage of lumber products.
The site also contained graded land and fields at the time of the site visit. Pilot did not identify on-site
RECs during the Phase I ESA; however, the following off-site RECs were identified:
• The potential for impact to the subject site from an undocumented release originating from a
former dry-cleaning facility located on an adjacent property east of the site;
• The potential for impact to the subject site from an undocumented release originating from a
former gasoline station located on an adjacent property west of the site;
• The potential for impact to the subject site from undocumented releases originating from a
current and former automotive repair and service facility and former metal stamping facility
located on adjacent properties south of the site;
• The potential for impact to the subject site from undocumented releases originating from
automotive service and repair facilities located approximately 200 and 250 feet east of the site
across Ivy Avenue; and
• The presence of a documented groundwater contaminant plume originating from unknown
sources in the vicinity of the site.
Based upon the results of the above reports, a Brownfields Property Application was submitted on
September 14, 2021, for the site by Kilpatrick Townsend & Stockton, PLLC on behalf of Two Cities Church,
Inc. for entry into the NCDEQ Division of Waste Management (NCDWM) – Brownfields Program (BP). On
January 14, 2022, The NCDEQ BP sent a Letter of Eligibility (LOE) for the site, which listed it as the Patterson
Avenue Property site and Brownfields Project Number of 25071-21-034. The LOE stated that while the
site was deemed eligible for entry into the BP, due to substantial influx of applications, the project was
not currently assigned a project manager. Subsequently, on March 1, 2022, a project manager was
assigned. ECS has prepared this Work Plan to establish a baseline of environmental conditions at the site.
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Brownfields Project ID: 25071-21-034
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The site is intended to be redeveloped as a church. There will be one building in the south central portion
of the site. The remainder of the site will be impervious surface paved parking areas and pervious
landscaping.
2.0 SCOPE OF WORK
The proposed scope includes site assessment activities required to establish a baseline of environmental
conditions and to support drafting a Brownfields Agreement for the site.
2.1 Soil Gas Probe Installation and Sampling
• ECS anticipates that one (1) soil gas sample will be collected from four (4) locations in the proposed
building footprint, as shown on Figures 2 and 2A. Actual locations may be adjusted based upon actual
field conditions but generally the locations are proposed to be within the current proposed future
building footprints. Soil gas samples will be collected in Summa canisters as described in subsequent
paragraphs.
• The soil gas sample points will be constructed by advancing borings to depths ranging from 5.5 feet
below ground surface (bgs) to 8.0 feet bgs using a direct push technology (DPT) type drill rig which
involves driving a hollow rod with plastic liner set inside the rod using a hydraulic ram. The estimated
depths of each soil gas boring are shown on Table 1 and correspond with depths equal to
approximately 5.0 to 6.0 feet below the lowest slab level of the proposed building. As the rod
penetrates the subsurface, soil is collected within the plastic liner. The rod is then extracted, and the
liner is removed and cut open exposing soil which can be examined.
• A stainless-steel vapor implant connected to a length of Nylaflow tubing will be positioned in each
boring at each sample point. The implant will be positioned near the bottom of each boring. The
annular space around and approximately 6 inches above the implant will be backfilled with clean filter
sand and bentonite will be placed in the remaining annular space. Distilled water will be poured into
the bentonite and allowed to hydrate for at least 12-hours before sampling is performed.
• As the vapor implant is to be installed in a boring that was conducted by a DPT drill rig, the soil gas
sample will not be collected for approximately 12 hours (or overnight) after installation, in order to
allow the soil vapors to stabilize prior to sample collection. This waiting period is to allow for
dissipation of potential 1,3-butadiene that has been documented to be produced due to friction
induced heat produced during DPT boring advancement.
• Prior to collecting the soil gas samples, a sample train consisting of non-reactive tubing and micro-
valves will be connected to the Nylaflow tubing at each sample point and to a Summa canister. The
sample train will be used to purge the sample lines and direct flow to the Summa canister being used
to collect the sample at each point. A shut-in test will be performed on the sample train at each
sample point to confirm that leaks are not present in the sampling train. A micro-valve at the
connection between the sampling train and the Nylaflow tubing will be closed, and a vacuum will be
applied to the sampling train using a disposable syringe. The vacuum gauge on the Summa canister
will be monitored for declining vacuum indicative of a leak.
• Prior to collecting the soil gas samples, a helium shroud leak test will be performed at each of the
sample point to confirm the integrity of the subsurface bentonite seal. The shroud will be placed and
sealed over the sampling point and entire sampling train including the Summa canister. The vapor
implant sample tubing and tracer gas tubing will be routed through small diameter holes in the wall
of the shroud. The shroud will be flooded with helium from a compressed gas tank through tracer gas
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Patterson Avenue Property
Brownfields Project ID: 25071-21-034
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tubing routed through the shroud wall. The helium gas concentration inside the shroud will be
measured with a helium gas detector. After the helium gas concentration inside the shroud has
reached a minimum of 10 percent, a minimum of three sample train volumes will be extracted and
then a soil gas sample will be extracted and measured with the helium detector. If the soil gas sample
contains less than 10 percent of the concentration inside the shroud, the test will be considered
acceptable. If the test results are not acceptable, ECS will take steps to achieve a better bentonite
seal.
• Following successful shut-in and helium shroud tests, ECS will collect a soil gas sample from each
sample point. ECS will obtain 1-Liter individually certified Summa canisters from a commercial
laboratory that follows National Environmental Laboratory Accreditation Conference (NELAC)
standards. Each canister will be pre-cleaned and pre-evacuated so that it is under negative (i.e., under
vacuum). The canisters will be individually certified by the laboratory. Each Summa canister will be
outfitted with a flow regulator set to 200 milliliters per minute (mL/min) and a vacuum gauge. ECS
will open the valve on the Summa canister and soil gas will flow into the canister. ECS will note the
time the valve is opened and the initial vacuum. If the initial vacuum is greater than 10 percent of the
vacuum as documented by the laboratory when it was shipped, the Summa canister will not be used.
When the pressure has decreased to approximately -5 inches of mercury, ECS will shut the valve and
record the time and final vacuum. Efforts will be taken for the pressure in the Summa canisters to be
unable to be allowed to decrease to below -5 inches of mercury.
• Following sample collection, the canisters will be labeled and shipped to a commercial laboratory to
be analyzed for volatile organic compounds (VOCs) including naphthalene using EPA Method TO-15.
ECS will follow chain-of-custody procedures throughout the sample collection and transportation
process.
• One duplicate soil-gas sample will be collected and submitted for laboratory analysis of VOCs per day of
soil gas assessment activity.
• A summary of the proposed samples and analysis are provided in Table 1.
2.2 Sub-Slab Soil Vapor Sampling
• ECS anticipates that three (3) sub-slab soil vapor sample will be collected, including one (1) from
beneath each existing building’s concrete slab via VaporPins® installed using a hammer drill to
penetrate through the concrete slab at the approximate locations shown on Figures 2 and 2A. Once
the concrete slab has been penetrated, a new VaporPin® with a new silicon sleeve will be inserted in
the concrete slab in general conformance with manufacturer’s recommendations (Vapor Pin
Enterprises, Inc.). The VaporPin® setup will be allowed to equilibrate for at least 20 minutes prior to
leak testing.
• A sample train consisting of non-reactive tubing and microvalves will be connected to each VaporPin®
and to a Summa canister. A shut-in test will be performed on the sample train at each sample point
to confirm that leaks are not present in the sampling train. A microvalve at the connection between
the sampling train and the VaporPin® will be closed, and a vacuum will be applied to the sampling
train using a disposable syringe. The vacuum gauge on the Summa canister will be monitored for
declining vacuum indicative of a leak. If a leak is indicated by a shut-in test, steps will be taken achieve
better connections in the sample train.
• Prior to sample collection, the seal of each VaporPin® will be leak tested using helium gas, a shroud,
and a helium detector as recommended in NCDEQ-DWM Vapor Intrusion Guidance. A shroud will be
Brownfields Assessment Work Plan, Revision 1.0
Patterson Avenue Property
Brownfields Project ID: 25071-21-034
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April 21, 2022
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placed and sealed over each VaporPin® and sample train. The shroud will be flooded with laboratory
grade helium via the hose placed through the shroud wall. The concentration of helium inside the
shroud will be measured with a helium detector (Model MGD-2002 Multi-Gas Leak detector or similar
device). The sample train and interstitial space of each VaporPin® will be purged of at least 3 volumes
via tubing routed through the wall of the shroud to a syringe. The flow rate during purging will be at
a rate of 200 milliliters per minute or less. Following purging, a soil vapor sample will be withdrawn
and extracted soil vapor will be directed to a Tedlar bag and monitored with a helium detector. If the
concentration measured is less than 10 percent of the helium concentration inside the shroud, the
seal on the VaporPin® and sampling train will be considered to be tight and not leaking. If a leak is
noted, ECS will make adjustments and repeat the testing process.
• ECS will obtain either one-liter or six-liter Summa canisters from a commercial laboratory that follows
NELAC standards and participates in the NELAP. Each canister will be pre-cleaned and pre-evacuated
so that it is under negative (i.e., under vacuum). The canisters will be individually certified by the
laboratory. Each Summa canister will be outfitted with a flow regulator set to 200 milliliters per
minute and a vacuum gauge.
• ECS will check and note the vacuum on each Summa Canister before initiating the sampling procedure.
If the initial vacuum prior to sample collection is less than 10 percent of the vacuum documented by
the laboratory at shipment, the Summa canister will not be used. ECS will open the valve on each
Summa cannister to initiate sampling. ECS will terminate the sampling procedure at each sampling
point while a vacuum of at least 5 inches of mercury is still present in the canister. ECS will note the
vacuum for each canister at the end of the sampling procedure. If the final vacuum is less than 5
inches of mercury the data may be unusable. In addition, the vacuum will not be allowed to reach
zero inches of mercury.
• The Summa canisters will be submitted to a NELAP certified laboratory for analyses of VOCs including
naphthalene by EPA Method TO-15. ECS will request that the laboratory analyze the sub-slab soil
vapor samples for the most current and applicable standards from NELAP. The laboratory will be
instructed to use reporting limits below the appliable NCDEQ screening levels and to report the
vacuum measurement for each sample canister at receipt by the laboratory.
• ECS will follow chain-of-custody procedures throughout the sample collection and transportation
process. The results of the laboratory analysis will be compared to the NCDEQ, Division of Waste
Management (DWM) residential and non-residential VISLs.
• One duplicate sub-slab soil vapor sample will be collected and submitted for laboratory analysis of VOCs
including naphthalene per day of sub-slab soil vapor assessment activity.
• A summary of the proposed samples and analyses are provided in Table 1.
2.3 Soil Boring and Sample Collection
• ECS will observe the advancement of 15 borings at the site in order to assess site soils to the
approximate depths of proposed grading at each respective location. The soil borings will be
advanced to depths of ranging from approximately 5.0 feet bgs to 10 feet bgs as indicated on Table 1
utilizing a DPT drill rig. The approximate proposed boring and sample locations are shown on Figures
2 and 2A. Please note that the boring locations may be altered if obvious signs of debris onsite are
noted during the field activities. If signs of landfill debris or buried organic material is noted in the soil
borings, methane screening activities will be conducted. A separate Work Plan will be prepared for
the methane screening activities if necessary.
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Brownfields Project ID: 25071-21-034
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• ECS will provide a project professional to collect soils continuously from the ground surface to the
termination depth of the soil borings. The soils will be collected over the length of the boring in
approximately 2.5-foot intervals and screened in the field by placing a portion into a resealable plastic
bag and measuring for volatile organic vapors using a photoionization detector (PID) after allowing to
set for approximately 15 minutes. The remaining soils from each interval will be placed either directly
into the laboratory sample containers (if the sample depth is known) or placed into a separate
resealable container and set aside for potential sampling purposes. The soil samples to be submitted
to the laboratory for analysis will be collected from separate soils than that which was allowed to
volatilize for the collection of the PID readings. Soil samples will be collected from the depth intervals
exhibiting the highest PID readings. If elevated PID readings are not noted, the soil samples will be
collected from the deepest interval.
• The samples will be submitted for laboratory analysis of VOCs by EPA Method 8260, semi-volatile
organic compounds (SVOCs) by EPA Method 8270, Resource Conservation and Recovery Act (RCRA)
Metals by EPA Method 6010/7471, and hexavalent chromium by EPA Method 7199.
• One duplicate soil sample will be collected per day of sampling and submitted for laboratory analysis
of VOCs, SVOCs, RCRA metals, and hexavalent chromium.
• The soil borings will be backfilled with the soil cuttings generated during the boring activities and
capped with asphalt, soil, or concrete, as appropriate. A summary of the proposed samples and
analyses are provided in Table 1.
2.4 Dripline Soil Sampling
• ECS will advance one soil boring to a depth of approximately two feet bgs at each side of the two
buildings at the areas shown on Figures 2 and 2A. The borings will be advanced via decontaminated
stainless-steel hand auger.
• One soil sample will be collected from each boring from depths of zero to one foot bgs. Each soil
aliquot from each side of each building will be composited into one sample for each building and
submitted for laboratory analysis of total lead by EPA Method 6010.
• In addition, soil aliquots will be collected from one to two feet bgs and placed on hold pending the
results of the zero-to-one-foot bgs composite samples. If exceedances are noted in the samples
collected over the zero-to-one-foot bgs interval, the samples collected from the one-to-two-foot bgs
interval will be analyzed for total lead following sample preparation by the toxicity characteristics
leaching procedure (TCLP).
• One duplicate soil sample will be collected per day of dripline soil sampling and submitted for
laboratory analysis of total lead.
• The soil borings will be backfilled with the soil cuttings generated during the boring activities. A
summary of the proposed samples and analyses are provided in Table 1.
2.5 Temporary Monitoring Well Installation and Groundwater Sampling
• ECS will subcontract with a North Carolina licensed well contractor to install four (4) temporary
monitoring wells at the locations shown on Figures 2 and 2A in order to assess groundwater quality
conditions at the site.
• The temporary monitoring wells will be constructed of flush-threaded, Schedule 40 one-inch PVC
equipped with a minimum of 10 feet section of well screen, installed to transect the water table
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surface as estimated during drilling, followed by blank PVC riser to the ground surface. Then clean
well sand will be placed from the bottom of the boring to above the well screen, followed by a
minimum of 2 feet of bentonite seal, locking expandable well cap, and keyed lock.
• Upon completion of the well installations, ECS will request that the drilling contractor develop each
monitoring well by bailing and/or pumping approximately 3 to 5 well volumes until the water
produced is visibly free of sediment. The relative elevations and horizontal position of the top of each
well casing will be determined by a North Carolina licensed surveyor. ECS will subsequently calculate
the groundwater elevation by subtracting the measured depths to water at each well from their
respective surveyed tops of casing. ECS will use the calculated groundwater elevation data to infer
the shallow groundwater flow direction across the subject property.
• After allowing the monitoring wells to stabilize at least 24 hours after construction, ECS will measure
water level in each well and collect groundwater samples. Water level measurements will be collected
using an electronic water level indicator accurate to 0.01 feet. The monitoring wells will be sampled
using low-flow sampling techniques in general conformance with USEPA guidelines (Revised
September 19, 2017) and water quality measurements will be collected/recorded. ECS will attempt
to maintain drawdown in each well to less than 0.3 feet during sampling. Water quality
measurements will be made using a flow-through cell at intervals approximately 3 to 5 minutes apart.
Parameters to be measured include turbidity, temperature, specific conductance, pH, oxidation-
reduction potential, and dissolved oxygen. Groundwater samples will be collected when each well
has stabilized. Stabilization will be considered achieved when three consecutive readings are within
the limits shown below:
➢ Turbidity (10% for values greater than 5 nephelometric turbidity units (NTUs); if three
turbidity values are less than 5 NTU, consider the values as stabilized).
➢ Dissolved Oxygen (10% for values greater than 0.5 mg/L, if three dissolved oxygen values are
less than 0.5 mg/L, consider the values as stabilized).
➢ Specific Conductance (5%).
➢ Temperature (3%).
➢ pH (± 0.2 standard pH unit).
➢ Oxidation/Reduction Potential (±10 millivolts)
• Groundwater samples from these wells will be analyzed for VOCs by EPA Method 8260, SVOCs by EPA
Method 8270, total and field filtered dissolved RCRA metals by EPA Method 6010 and 7470.
Comparison of the concentrations of total versus dissolved RCRA metals will provide information as
to whether the concentrations of total RCRA metals may be biased high as the result of sediment or
particulate matter in the temporary well groundwater samples.
• One duplicate groundwater sample and one equipment blank sample will be collected and submitted
for laboratory analysis of VOCs, SVOCs, and total and dissolved RCRA metals. One trip blank sample
will accompany groundwater sample containers from laboratory to the field, and back to the
laboratory and will be analyzed for VOCs. The attached Table 1 indicates the proposed groundwater
sample designation, analysis, and sample type.
• As stated above, ECS will contract with a North Carolina licensed surveyor to vertically and horizontally
locate the monitoring wells. The survey data will be presented in tabular form.
• Following sample collection and surveying activities, the temporary monitoring wells will be
abandoned by the North Carolina certified well driller in accordance with North Carolina regulations.
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• A summary of the proposed samples and analysis are provided in Table 1.
2.6 Quality Control/Quality Assurance Sampling
In addition to the above samples, for Level II quality control/quality assurance (QA/QC) purposes one soil
gas duplicate sample and one sub-slab soil vapor sample will be collected per day and submitted for VOCs
analysis by EPA Method TO-15. The duplicates will be collected in conjunction with the respective record
sample via a “tee” connection in the tubing. Also, one duplicate soil sample, one duplicate drip line
composite soil samples, and one duplicate groundwater sample will be collected per day and submitted
for the sample analyses as the record sample. Duplicate samples will be submitted to the laboratory
without identification as to their respective record samples.
The soil and groundwater samples will be submitted to a North Carolina certified laboratory for analysis.
Since North Carolina does not certify laboratories for analyses of air samples, ECS will request that the
laboratory analyze air samples for the most current and applicable standards from NELAP. Additionally,
it will be requested that the method detection limits (MDL), and J-flags be included.
2.7 Deviation from Approved Plan
This Work Plan is intended to be dynamic and to be adapted to specific and actual site conditions.
Accordingly, should such conditions warrant a change either by addition, deletion, or modification of a
procedure, such may be accomplished with agreement between Two Cities Church, Inc.’s representative
and ECS after consultation with, and subject to approval by the BP. Such changes will comply with
applicable local, State, and Federal rules and regulations. A written amendment shall be prepared and
submitted to NCBP for approval (the use of e-mail correspondence shall suffice for approval, followed by
a hard copy or electronic copy provided on Disk or similar media) prior to implementation. Amendments
must have the approval of the NCDEQ Brownfields Program prior to implementation.
3.0 RECEPTOR SURVEY
A Brownfields Property receptor survey will be completed, summarized in a written report for this Work
Plan, and included as an attachment within that report. The Brownfields Property receptor survey includes
descriptions of the property and building characteristics, surrounding property land use, nearby utilities,
water supplies, surface water, and wetlands. A blank copy of the NCDEQ Brownfields Property Receptor
Survey/Checklist is included Appendix A.
4.0 INVESTIGATIVE DERIVED WASTE
Investigative derived waste (IDW) generated from the soil borings (i.e., soil cuttings) will be thinly spread
onsite in the vicinity of the boring location, unless impacted soil is apparent based on field observations
(i.e., visual and/or olfactory senses or elevated PID/FID readings). If soil cuttings appear to be impacted,
the soil cuttings will be containerized. If soil cuttings are containerized, additional waste characterization
will be proposed and detailed in a separate Work Plan.
IDW generated from the construction, development, and sampling of monitoring wells (i.e., soil cuttings,
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development water, and purge water) will be managed in general accordance with NCDEQ-DWM-IHSB
Program’s Guidelines for Assessment and Cleanup (Revised July 2021). IDW will be placed onsite in the
vicinity of the monitoring well location, unless impacts are apparent based on field observations (i.e.,
visual and/or olfactory senses or elevated PID/FID readings), in which case these materials will be
containerized, profiled, and manifested to a facility permitted to accept the waste stream.
5.0 REPORTING
ECS will prepare a written report for this Work Plan documenting the field activities, sampling procedures,
sample locations, laboratory procedures and analytical results discussion, and conclusions for submission
to the BP. The report will include a sample location figure, shallow groundwater potentiometric map,
boring logs, and data tables. The soil gas sample results will be compared to the current NCDEQ, IHSB,
Residential and Non-Residential Vapor Intrusion Screening Levels (VISLs) for Sub-slab and Exterior Soil
Gas. The exterior soil gas samples and groundwater results will also be input into the NCDEQ Risk
Calculator to assess if the results exceed applicable risk thresholds. The soil samples results will be
compared to the current NCDEQ Residential PSRGs, and the groundwater samples will be compared to
the current North Carolina 2L Groundwater Quality Standards and VISLs. Sample collection logs will be
included in the report. The sample collection logs will include helium leak checks results, site specific
Safety Data Sheets if necessary, and photographs of the sample locations. The report will be signed and
sealed by a North Carolina Professional Engineer or Licensed Geologist. The report will also include ECS’s
corporate Professional Engineers and Geologists Licenses.
The Brownfields Property Receptor Survey will be completed and summarized in the written report for
this Work Plan. The NCDEQ Brownfields Property Receptor Survey/Checklist will be included as an
attachment to the written report for this Work Plan.
FIGURES
SOURCE:
USGS 7.5’ TOPOGRAPHIC MAP
WINSTON SALEM EAST, NC 2019
WINSTON SALEM WEST, NC 2019
SCALE:
AS SHOWN
FIGURE 1
USGS TOPOGRAPHIC MAP
PATTERSON AVENUE PROPERTY
1111, 1115, 1033, & 1201 N. PATTERSON AVE., IVY
AVE., AND 317, 325, 403 E. TENTH STREET
WINSTON SALEM, NORTH CAROLINA
BROWNFIELDS PROJECT ID: 25071-21-034
ECS PROJECT NO. 49:14631-A
SITE
LOCATION
FIGURE 2
PROPOSED SAMPLE LOCATIONS AERIAL MAP
PATTERSON AVENUE PROPERTY
1111, 1115, 1033, & 1201 N. PATTERSON AVE.,
IVY AVE., AND 317, 325, 403 E. TENTH STREET
WINSTON SALEM, NORTH CAROLINA
BROWNFIELDS PROJECT ID: 25071-21-034
ECS PROJECT NO. 49:14631-A
SOURCE:
FORSYTH COUNTY GIS WEBSITE
ACCESSED FEBRUARY 23, 2021
SCALE:
150 75 0 150
APPROXIMATE SITE BOUNDARY
LEGEND
APPROXIMATE SOIL SAMPLE LOCATION
APPROXIMATE TEMPORARY MONITORING WELL LOCATION
APPROXIMATE SOIL GAS SAMPLE LOCATION
APPROXIMATE PROPOSED
BUILDING FOOTPRINT
SG-1
SG-3
SG-4
SG-2
SS-1
SS-2/MW-1
SS-3
SS-4/MW-2
SS-5
SS-6
SS-7
SS-8
SS-9
SS-10 SS-11
SS-12/MW-3
SS-13
SS-15
APPROXIMATE SUB-SLAB SOIL VAPOR SAMPLE LOCATION
SV-1
SV-2
SV-3
SS-14/MW-4
APPROXIMATE PROPOSED
DP-2 DRIPLINE SAMPLING
AREA
APPROXIMATE PROPOSED
DP-1 DRIPLINE SAMPLING
AREA
SS-4/MW-2
FIGURE 2A
PROPOSED SAMPLE LOCATIONS
DEVELOPMENT MAP
PATTERSON AVENUE PROPERTY
1111, 1115, 1033, & 1201 N. PATTERSON AVE.,
IVY AVE., AND 317, 325, 403 E. TENTH STREET
WINSTON SALEM, NORTH CAROLINA
BROWNFIELDS PROJECT ID: 25071-21-034
ECS PROJECT NO. 49:14631-A
SOURCE:
PRELIMINARY PLAN (02/21/22)
PREPARED BY:
THOMAS A. RICCIO & ASSOCIATES
SCALE:
150 75 0 150
APPROXIMATE SITE BOUNDARY
LEGEND
APPROXIMATE PROPOSED
BUILDING FOOTPRINT
SG-1
SG-3
SG-4
SG-2
SS-1
SS-2/MW-1
SS-5
SS-6
SS-7
SS-8
SS-9
SS-10 SS-11
SS-12/MW-3
SS-13
SS-15
SS-3
SS-14/MW-4
SV-3
APPROXIMATE PROPOSED
DP-2 DRIPLINE SAMPLING
AREA
APPROXIMATE PROPOSED
DP-1 DRIPLINE SAMPLING
AREA
SV-1
SV-2
APPROXIMATE SOIL SAMPLE LOCATION
APPROXIMATE TEMPORARY MONITORING WELL LOCATION
APPROXIMATE SOIL GAS SAMPLE LOCATION
APPROXIMATE SUB-SLAB SOIL VAPOR SAMPLE LOCATION
TABLE
Table 1
Proposed Samples & Analysis
Patterson Avenue Property
N. Patterson Avenue, Ivy Avenue, and E. Tenth Street
Winston-Salem, Forsyth County, North Carolina
Brownfields Project No.: 25071-21-034
ECS Project No.: 49:14631-A
SG-1 5.5 Individual
SG-2 5.5 Individual
SG-3 6.0 Individual
SG-4 8.0 Individual
SG-DUP Undetermined Individual
SV-1 NA Individual
SV-2 NA Individual
SV-3 NA Individual
SV-DUP NA Individual
SS-1 5.0 NA
SS-2 5.0 NA
SS-3 5.0 NA
SS-4 5.0 NA
SS-5 5.0 NA
SS-6 5.0 NA
SS-7 10.0 NA
SS-8 7.5 NA
SS-9 5.0 NA
SS-10 5.0 NA
SS-11 5.0 NA
SS-12 5.0 NA
SS-13 5.0 NA
SS-14 5.0 NA
SS-15 5.0 NA
SS-DUP 5.0 NA
Lead / EPA Method 6010C 0.0 - 1.0 NA
TCLP Lead / EPA Method 6010C 1.0 - 2.0 (if necessary)NA
Lead / EPA Method 6010C 0.0 - 1.0 NA
TCLP Lead / EPA Method 6010C 1.0 - 2.0 (if necessary)NA
DP-DUP Lead / EPA Method 6010C 0.0 - 1.0 NA
MW-1 25.0 (estimated)NA
MW-2 25.0 (estimated)NA
MW-3 25.0 (estimated)NA
MW-4 25.0 (estimated)NA
MW-DUP 25.0 (estimated)NA
Equipment Blank NA NA
Trip Blank VOCs / EPA Method 8260 NA NA
Notes:
VOCs = Volatile Organic Compounds
SVOCs - Semi-Volatile Organic Compounds
Chromium VI = Hexavalent Chromium
DUP = Duplicate Sample
ft-bgs = feet below ground surface
TCLP = Toxicity Characteristics Leaching Procedure
VOCs / EPA Method 8260
SVOCs / EPA Method 8270
Total RCRA Metals / EPA Method 6010
Dissolved RCRA Metals / EPA Method 6010
Groundwater Samples
Soil Samples
Sample Media
Soil Gas Samples
Laboratory Analysis / Analytical Method Batch / Individual Certified
Summa Canister
VOCs / EPA Method 8260
SVOCs / EPA Method 8270
RCRA Metals / EPA Method 6010
Chromium VI / EPA Method 7199
VOCs including naphthalene / TO-15
Sample Depth (ft-bgs)
Sub-Slab Soil Vapor Samples
VOCs including naphthalene / TO-15
Dripline Soil Samples
DP-2
DP-1
APPENDIX
North Carolina Department of Environmental Quality
Division of Waste Management
Brownfields Program
Site:
Address:
City:
County:
Brownfields Project Number:
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.
No subslab ventilation systems in place. It is not known if moisture barriers are in place.
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?).
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
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 building 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
Rev. 09/2015 Page 1 of 3
North Carolina Department of Environmental Quality
Division of Waste Management
Brownfields Program
Surrounding Property Land Use
Utilities
Is there a septic system on-site? (Y or N) ___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.
Zoning/Land Use Proposed Usage Current Use/Occupant
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.
For the subject property, please provide a map of known buried utilities. If available, include depth to top,
construction material, and diameter of the utilities. In addition, please provide the following information on utility
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?
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?
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
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 Address
a. Is the water body naturally developed or
man-made?
Y/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.
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.
The purpose of this section is to provide information on the water supply for the site and surrounding areas.
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
b d?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.
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