27028_American Hardware_BAR WP_20231214

ATTACHMENT 1
DEQ Brownfields Redevelopment Section
Assessment Work Plan Approval Signature Page
To be completed by Development Team and returned to DEQ Brownfields for review & signature.

Brownfields Project Name: American Hardware
Brownfields Project Number: 27028-23-060
Work Plan Title: Brownfields Assessment Work Plan
Date: December 14, 2023
Revision Number: 1.0

Be advised that this approval from DEQ Brownfields does not waive any applicable requirement to
obtain any necessary permits, licenses, or certifications for the above listed activities nor does it waive
any requirement to comply with applicable law for such activities.

Prospective Developer (PD): APMRP 526 S. Church Venture, LLC
Contact Person: Huriyet Anaz
Phone Numbers: Office: Click or tap here to enter text. Mobile: [phone]
Email: [e-mail]

Property Owner (if different from above): 526 S Church Phase I Owner, LLC c/o MRP Realty
Contact Person: Huriyet Anaz
Phone Numbers: Office: Click or tap here to enter text. Mobile: [phone]
Email: [e-mail]

Environmental Consultant: ECS Southeast, LLC
Contact Person: Scott Young, P.G.
Phone Numbers: Office: 704-525-5152 Mobile: [phone]
Email: [e-mail]
Signature:

Brownfields Project Manager: Carolyn Minnich
Phone Numbers: Office: 704-661-0330 Mobile: Click or tap here to enter text.
Email: [e-mail]
Signature:

Consultant: Scott Young, P.G. Date 12/14/2023
Printed Name/Title/Company: Scott Young/Senior Environmental
Project Manager/ECS Southeast, LLC
PG/PE SEAL HERE
Brownfields Project Manager:Carolyn Minnich Date Click or tap to enter a date.
12/14/2023

BROWNFIELDS ASSESSMENT WORK PLAN

AMERICAN HARDWARE
526 SOUTH CHURCH STREET and 501 SOUTH MINT STREET
CHARLOTTE, MECKLENBURG COUNTY, NORTH CAROLINA

ECS PROJECT NO. 49:17189-B
BROWNFIELDS PROJECT ID: 27028-23-060

PREPARED FOR
APMRP 526 S. Church Venture, LLC
c/o MRP Realty
3050 K Street NW, Suite 125
Washington, DC 20007

SUBMITTED: DECEMBER 4, 2023
REVISED: DECEMBER 14, 2023

1

December 4, 2023
Revised: December 14, 2023

North Carolina Department of Environmental Quality
Division of Waste Management, Brownfields Redevelopment Section
610 East Center Avenue
Suite 301
Mooresville, North Carolina 28115

Attn: Ms. Carolyn Minnich, Project Manager

Reference: Brownfields Assessment Work Plan
American Hardware Site
526 South Church Street and 501 South Mint Street
Charlotte, Mecklenburg County, North Carolina
North Carolina Brownfields ID No. 27028-23-060
ECS Project No. 49:17189-B
Dear Ms. Minnich,

ECS Southeast, LLC (ECS) has prepared this Work Plan to conduct Brownfields Assessment Activities
at the subject property on behalf of our client, APMRP 526 S. Church Venture, LLC. This Work Plan
has been developed at the request of the North Carolina Department of Environmental Quality
(NCDEQ) Division of Waste Management (NCDWM) – Brownfields Redevelopment Section (BRS)
during a conference call conducted on November 8, 2023. This Work Plan was initially submitted to
the BRS on December 4, 2023. ECS received comments to the Work Plan from the BRS via email on
December 13, 2023. This revised Work Plan incorporates those comments and associated edits.

If you have any questions concerning this work plan or this project, please contact us.

Sincerely,
ECS SOUTHEAST, LLC
Scott Young, P.G. Roger A. Smith, P.G.
Senior Environmental Project Manager Senior Principal Geologist
[e-mail] [e-mail]

NC Corporate Geology License #C-553

cc: Ms. Huriyet Anaz – MRP Realty, LLC
Ms. Laura Boorman Truesdale – Moore & Van Allen
Mr. Pierce Warner – Moore & Van Allen
Brownfields Assessment Work Plan, Revision 1.0
American Hardware Brownfields Site
Brownfields Project ID: 27028-23-060
ECS Project No. 49:17189-B
December 14, 2023

TABLE OF CONTENTS

1.0 INTRODUCTION .......................................................................................................................... 1
2.0 SCOPE OF WORK ......................................................................................................................... 2
2.1 Soil Boring Advancement ..................................................................................................... 3
2.2 Monitoring Well Installation ................................................................................................ 3
2.3 Sub-Slab Soil Gas Probe Installation .................................................................................... 3
2.4 Brownfields Receptor Survey ............................................................................................... 4
2.5 Deviation from Approved Plan ............................................................................................ 4
3.0 SAMPLING METHODOLOGY ....................................................................................................... 4
3.1 Soil Sampling ........................................................................................................................ 5
3.2 Groundwater Sampling ........................................................................................................ 5
3.3 Sub-Slab Soil Gas and Sampling ........................................................................................... 5
4.0 LABORATORY ANALYSES ............................................................................................................. 6
4.1 Soil Sample Analyses ............................................................................................................ 6
4.2 Groundwater Sample Analyses ............................................................................................ 6
4.3 Sub-Slab Soil Gas Analyses ................................................................................................... 7
5.0 QUALITY ASSURANCE/QUALITY CONTROL ................................................................................. 7
6.0 INVESTIGATIVE DERIVED WASTE ................................................................................................ 7
7.0 REPORTING ................................................................................................................................. 7

FIGURES

Figure 1 USGS Topographic Map
Figure 2 Previous Sample Locations Map
Figure 3 Proposed Sample Locations – Aerial Map
Figure 4 Proposed Sample Locations – Plan Map

TABLE

Table 1 Proposed Samples & Analysis

APPENDIX

Appendix A Previous Groundwater Sampling Results
Appendix B NCDEQ Brownfields Property Receptor Survey/Checklist
Brownfields Assessment Work Plan, Revision 1.0
American Hardware Brownfields Site
Brownfields Project ID: 27028-23-060
ECS Project No. 49:17189-B
December 14, 2023

1

1.0 INTRODUCTION

The subject property is located at 526 South Church Street and 501 South Mint Street in Charlotte, Mecklenburg
County, North Carolina (Figure 1) and identified by Mecklenburg County GIS as Parcel Identification Numbers
0730-4101 and 0730-4102 and are owned by 526 S Church Phase I Owner, LLC. The subject property is
approximately 3.86-acre in area. The 526 South Church Street property was constructed in 1975 and consists of a
two-story parking structure on the ground levels, mechanical rooms, an atrium, executive offices, and a 14-story
tower containing general office space. The property located at 501 South Mint Street was constructed in 1985 and
consists of a 14-story tower, two story parking structure, three levels of administrative and executive office areas,
and an asphalt-surfaced parking lot.

ECS was provided a Phase I Environmental Site Assessment (Phase I ESA) conducted by S&ME, Inc. (S&ME) for the
subject property (S&ME Project No. 216715 dated September 13, 2021) by MRP Realty, parent company of APMRP
526 S. Church Venture, LLC. The following recognized environmental conditions (RECs) were identified in S&ME’s
Phase I ESA:

• Historical light commercial operations including a dye and chemical warehouse, cold storage facility and
automotive repair operations was considered a REC.
• Petroleum-impacted groundwater associated with the former Knight Publishing on the southeast
adjoining property, with a reported groundwater flow direction to the east, towards the subject property
was considered a REC.

Although not considered RECs of the site, S&ME also identified the following environmental concerns on the
subject property:

• Twelve oil-cooled pad-mounted transformers.
• Potential in-ground oil/water separator.
• Five diesel generators with associated day tanks
• One 2,000-gallon capacity diesel-containing above ground storage tank (AST).
• Diesel fill port located on the southwest exterior on the South Mint Street property.
• One groundwater monitoring well associated with two closed-in-place 1,500-gallon capacity
underground storage tanks (USTs).
• Chemical storage areas.
• Ethylene glycol and glycol-containing chiller system.
• Electric drive elevator equipment.

In an effort to determine if the subject property has been adversely affected by the identified RECs, ECS was
requested to conduct an environmental assessment of the site. Results of the assessment activities were
documented in ECS’s Report of Environmental Assessment Services (ECS Project No. 49:17189, dated June 22,
2022).

Four groundwater samples (TW-1 through TW-4) were collected in the subsurface parking lot located in the
northwest portion of the site and submitted for analysis of volatile organic compounds (VOCs) by EPA Method
8260 and semi-volatile organic compounds (SVOCs) by EPA Method 8270. The locations of the groundwater
samples are indicated on Figure 2. Results of the laboratory analysis of the groundwater samples collected
Brownfields Assessment Work Plan, Revision 1.0
American Hardware Brownfields Site
Brownfields Project ID: 27028-23-060
ECS Project No. 49:17189-B
December 14, 2023

2

indicated 2-hexanone in the TW-1 groundwater sample and trichlorofluoromethane in the TW-1 and TW-3
groundwater samples at concentrations greater than the laboratory method reporting limits, but less than their
respective North Carolina 2L Groundwater Quality Standards (NC2LGWQS). Additional VOCs were not detected
at concentrations greater than the laboratory method reporting limits in any of the groundwater samples
collected during this assessment. SVOCs were also not detected in any of the groundwater samples collected
during this assessment at concentrations greater than the laboratory method reporting limits.

ECS completed a Phase I ESA for the site (ECS Project No. 49:17166) dated June 24, 2022. The site was in the same
general condition as stated in the S&ME Phase I ESA. The following RECs were identified in ECS’s Phase I ESA:

• ECS considers the potential for undocumented releases from the historic use of the subject property as a
dye and chemical laboratory and warehousing (at least 1929-1969) and automotive repair (at least 1951
through 1969) to represent a REC.
• ECS considers the potential for undocumented releases to migrate and impact the subject property from
historic operations of automotive repair and painting facilities at south-southeast adjoining properties to
represent a REC.
• ECS considers the potential for the documented groundwater impacts at the southwest adjoining
property to migrate and impact the southern portion of the subject property to represent a REC.

Based on a September 15, 2023, Letter of Eligibility (LOE) from the NCDEQ, Brownfields Program, the site and
relevant information (including the above referenced reports and documents) were provided to the NCDEQ and
the site was deemed eligible for entry into the North Carolina Brownfields Redevelopment Section (BRS). The site
was assigned the Brownfields Project Name of American Hardware and given the Brownfields Project Number of
27028-23-060. Additionally, based on a review of the NCDEQ Site Locator Tool, the site was listed as “Active
Eligible”, dated September 14, 2023.

On November 8, 2023, a Brownfields Kickoff meeting was conducted with APMRP 526 S. Church Venture, LLC,
their environmental attorney, ECS, and Ms. Carolyn Minnich, the assigned BRS Project Analyst. Based on the
results of that meeting, ECS has prepared this work plan to conduct the following additional Brownfields
assessment:

• Temporary monitoring well installation and groundwater sampling;
• Shallow soil assessment activities;
• Sub-slab soil gas sampling activities; and,
• Completion of a Brownfields Receptor Survey.

Currently the site is not regulated by another NCDEQ program; therefore, the data is to be collected solely for the
NC Brownfields Program.

2.0 SCOPE OF WORK

The scope of work described by media below generally includes five soil borings, two temporary monitoring wells,
and 11 sub-slab soil gas sample. The drilling activities will be conducted in general accordance with Well
Construction Rules (NCAC 2C), Science and Ecosystem Support Division (SESD) guidelines, NCDEQ Vapor Intrusion
guidelines, and NCDEQ Brownfields Assessment Guidelines.
Brownfields Assessment Work Plan, Revision 1.0
American Hardware Brownfields Site
Brownfields Project ID: 27028-23-060
ECS Project No. 49:17189-B
December 14, 2023

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2.1 Soil Boring Advancement

• A total of five soil borings will be advance at the site in order to assess shallow site soils. Two soil borings (SB-
1 and SB-2) will be advance in the subsurface parking lot in the northwestern portion of the site. Soil boring
SB-3 will be located in the approximate former auto repair area and soil borings SB-4 and SB-5 approximate
former dye and chemical laboratory and warehouse area. The proposed boring and sample the locations are
shown on Figures 3 and 4.
• Soil borings SB-1 and SB-2 will be advanced via a DPT drilling rig and soil borings SB-3, SB-4, and SB-5 will be
advanced via hand auger. The borings will be advanced to a depth of five feet below ground surface.

2.2 Monitoring Well Installation

• ECS will subcontract with a North Carolina licensed well contractor to install two temporary groundwater
monitoring wells (GW-1 and GW-2) at the locations shown on Figures 3 and 4 in order to assess groundwater
conditions at the site. The temporary monitoring wells will be installed utilizing a direct push technology (DPT)
type drilling rig. Previous groundwater sampling results from June 2022 are summarized in the table included
in Appendix A.
• Each temporary monitoring well will be constructed of flush-threaded, Schedule 40 two-inch poly vinyl
chloride (PVC) equipped with a minimum of 10 feet section of well screen, installed to transect the water table
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 each boring to approximately 1 foot above the well screen. The remainder
of the annual space in each boring will remain open. A locking expansion plug will be provided at each
temporary monitoring well.
• Approximately 24 hours following completion of the well installations, each temporary monitoring well will
be developed by bailing and/or pumping until the water produced is visibly free of sediment and pH,
temperature, and specific conductivity have stabilized. Stabilization will be considered achieved when three
consecutive readings are within the limits shown below:

 Specific Conductance (3%).
 Temperature (3%).
 pH (± 0.1 standard pH unit).

2.3 Sub-Slab Soil Gas Probe Installation

• ECS anticipates that up to 11 sub-slab soil gas samples (SS-1 through SS-11) will be collected using a hammer
drill to penetrate through the concrete slab at the approximate location shown on Figures 3 and 4. Sub-slab
soil gas samples SS-1, SS-5, SS-6, SS-7, and SS-11 are in areas where proposed elevators and/or stairwells are
to be located. The remaining sub-slab soil gas samples are positioned throughout the site in order to assess
the potential for vapor intrusion risks. 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 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
Brownfields Assessment Work Plan, Revision 1.0
American Hardware Brownfields Site
Brownfields Project ID: 27028-23-060
ECS Project No. 49:17189-B
December 14, 2023

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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 the VaporPin® will be leak tested using helium gas, a shroud, and a
helium detector as recommended in NCDEQ Division of Waste Management (DWM) Vapor Intrusion
Guidance. A shroud will be placed and sealed over the 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 three 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 gas sample will be withdrawn and extracted soil
gas 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 a one-liter Summa canisters from a commercial laboratory that follows NELAC standards and
participates in the NELAP. The canister will be pre-cleaned and pre-evacuated so that it is under negative (i.e.,
under vacuum). The canister will be batch certified by the laboratory. The Summa canister will be outfitted
with a flow regulator set to 200 milliliters per minute and a vacuum gauge.

2.4 Brownfields Receptor Survey

A Brownfields Property receptor survey will be completed, summarized in the report and included as an
attachment within the 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 B.

2.5 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 the Prospective Developers’ representative and ECS after consultation
with, and subject to approval by the NCDEQ BRS. Such changes will comply with applicable local, State, and
Federal rules and regulations. A written amendment shall be prepared and submitted to NCDEQ BRS for approval
(the use of e-mail correspondence shall suffice for approval) prior to implementation. The amendment and
approval will be included in the report for final documentation. Amendments must have the approval of the
NCDEQ BRS prior to implementation.

3.0 SAMPLING METHODOLOGY

The sampling activities will be conducted in general accordance with Well Construction Rules (NCAC 2C), Science
and Ecosystem Support Division (SESD) guidelines, and North Carolina Department of Environmental Quality
(NCDEQ) Vapor Intrusion guidelines. The monitoring wells will be sampled using low-flow sampling techniques in
general conformance with USEPA Low Stress/Low Flow Purging and Sampling Procedure for the Collection of
Groundwater Samples from Monitoring Wells guidelines (Revised September 19, 2017).
Brownfields Assessment Work Plan, Revision 1.0
American Hardware Brownfields Site
Brownfields Project ID: 27028-23-060
ECS Project No. 49:17189-B
December 14, 2023

5

3.1 Soil Sampling

• 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.
• 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.

3.2 Groundwater Sampling

• After allowing the temporary monitoring wells to stabilize at least 24 hours after development, ECS will
measure water level in each well and collect groundwater samples. Water levels will be measure in, and
groundwater samples collected from, each of the temporary monitoring wells. Water level measurements
will be collected using an electronic water level indicator accurate to 0.01 feet. ECS will attempt to maintain
drawdown in each well to less than 0.3 feet during sampling and water quality measurements will be
collected/recorded. 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 10 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 (3%).
 Temperature (3%).
 pH (± 0.1 standard pH unit).
 Oxidation/Reduction Potential (±10 millivolts)

• A summary of the proposed samples and analyses are provided in Table 1.
• Following completion of the Brownfield Assessment activities and with approval of the NCDEQ BRS, the
monitoring wells will be abandoned in general accordance with North Carolina well construction standards.

3.3 Sub-Slab Soil Gas and Sampling

• ECS will check and note the vacuum on the 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
Brownfields Assessment Work Plan, Revision 1.0
American Hardware Brownfields Site
Brownfields Project ID: 27028-23-060
ECS Project No. 49:17189-B
December 14, 2023

6

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 the canister at the end of the
sampling procedure. If the final vacuum is less 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 canister will be submitted to a NELAP certified laboratory for analyses of VOCs by EPA Method
TO-15. ECS will request that the laboratory analyze 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.
• Following completion of sub-slab soil gas sampling activities, the sub-slab soil gas sampling point will be
abandoned, and the borings capped with concrete. A summary of the proposed sample and analysis are
provided in Table 1.

4.0 LABORATORY ANALYSES

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 vapor samples, ECS will request that the laboratory
analyze vapor samples for the most current and applicable standards from NELAP. The laboratory will be
instructed to use reporting limits below the IHSB Preliminary Soil Remediation Goals, NCAC 2L Groundwater
Quality Standards, and the NCDEQ, Division of Waste Management residential and non-residential VISLs.
Additionally, it will be requested that the method detection limits (MDL), and J-flags be included. The laboratory
will also be instructed to report the vacuum measurement for each Summa canister at receipt by the laboratory.
Level II QA/QC will be requested to be reported by the laboratory.

The samples will be collected into pre-preserved containers supplied by the laboratory in order to ensure that
enough sample volume is delivered to the laboratory for analysis. Chain-of-custody (COC) protocol will be
followed during transport of the samples to the laboratory. The samples will be delivered to the laboratory at the
end of each sampling day. If the samples are not able to be transported to the laboratory at the end of the
sampling day, the soil and groundwater samples will be maintained on ice under COC protocol and the soil gas
samples will be maintained under constant temperature and pressure. Documentation of storage of the samples
will be included in the summary report if necessary.

4.1 Soil Sample Analyses

The soil samples will be submitted for the laboratory analyses of VOCs by EPA Method 8260, SVOCs by EPA Method
8270, RCRA Metals by EPA Methods 6020 and 7470, and hexavalent chromium by EPA Method 7199.

4.2 Groundwater Sample Analyses

Groundwater samples from the temporary monitoring wells will be submitted for analysis of VOCs by EPA Method
8260, SVOCs by EPA Method 8270, and total and field filtered dissolved RCRA metals by EPA Method 6020 and
7470. Comparison of the concentrations of total versus dissolved RCRA metals will provide information as to
Brownfields Assessment Work Plan, Revision 1.0
American Hardware Brownfields Site
Brownfields Project ID: 27028-23-060
ECS Project No. 49:17189-B
December 14, 2023

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whether the concentrations of total RCRA metals may be biased high as the result of sediment or particulate
matter in samples.

4.3 Sub-Slab Soil Gas Analyses

The soil gas samples will be submitted for analyses of VOCs by EPA Method TO-15.

5.0 QUALITY ASSURANCE/QUALITY CONTROL

In addition to the above samples, for Level II quality control/quality assurance (QA/QC) purposes one exterior soil
gas, one sub-slab soil gas, and one groundwater duplicate sample will be collected. The duplicate exterior soil gas
and sub-slab soil gas samples will be collected in conjunction with the respective record sample via a “tee”
connection in the tubing. Due to the possible varying analyses for the soil samples per area, ECS will collect one
duplicate soil sample from each soil sampling area for a total of five duplicate soil samples. The duplicate soil
samples will be submitted for the same analyses as the record sample they are associated with. Duplicate samples
will be submitted to the laboratory without identification as to their respective record samples.

Also, one equipment blank sample will be collected per day of groundwater sampling 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.

6.0 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 to the extent possible, 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 or sufficient space to thinly spread the cuttings is not available, the soil cuttings will be containerized.
If soil cuttings are containerized, additional waste characterization will be conducted based on the requirements
of the disposal facility.

IDW generated from the construction, development, and sampling of temporary monitoring wells (i.e., soil
cuttings, development water, and purge water) will managed in general accordance with NCDEQ-DWM-IHSB
Program’s Guidelines for Assessment and Cleanup (Revised October 2015). 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.

7.0 REPORTING

ECS will prepare a written report documenting the field activities, sampling procedures, sample locations,
laboratory procedures and analytical results discussion, and conclusions for submission to the NCBP. The report
will include a sample location figure, groundwater potentiometric map, boring logs, and data tables. The soil
samples results will be compared to the current NCDEQ Residential Preliminary Soil Remediation Goals (PSRGs),
and the groundwater samples will be compared to the current North Carolina 2L Groundwater Quality Standards
and Groundwater Screening Levels (GWSL) for Vapor Intrusion (VI). The sub-slab soil gas sample results will be
compared to the current NCDEQ, IHSB, Residential and Non-Residential VISLs for Sub-slab and Exterior Soil Gas.
Brownfields Assessment Work Plan, Revision 1.0
American Hardware Brownfields Site
Brownfields Project ID: 27028-23-060
ECS Project No. 49:17189-B
December 14, 2023

8

If positive detections are noted, the soil, groundwater, and sub-slab soil gas sample results will also be input into
the NCDEQ Risk Calculator to assess if the results exceed applicable risk thresholds. Sample collection logs for soil
gas and groundwater samples will be included in the report. The sample collection logs for soil gas samples will
include helium leak checks results, site specific Safety Data Sheets if necessary, and photographs of the sample
arrays. The sample collection logs for groundwater samples will include well information and field geochemistry
data for low-flow groundwater sampling. The report will be signed and sealed by a North Carolina Professional
Engineer or Licensed Geologist. The report will also include the identification numbers for ECS’s corporate
Professional Engineers and Geologists Licenses.

The Brownfields Property receptor survey will be completed and summarized in the report. The NCDEQ
Brownfields Property Receptor Survey/Checklist will be included as an attachment to the report.

FIGURES
FIGURE 1USGS TOPOGRAPHIC MAP
AMERICAN HARDWARE BROWNFIELDS SITE501 SOUTH MINT ST. & 526 SOUTH CHURCH ST.CHARLOTTE, NORTH CAROLINABROWNFIELDS PROJECT NO. 27028-23-060ECS PROJECT NO. 49:17189-B
SOURCE:
USGS 7.5’ TOPOGRAPHIC MAP
CHARLOTTE EAST, NC 2019
SCALE:
AS SHOWN
SITE
LOCATION
FIGURE 2PREVIOUS SAMPLE LOCATIONS MAP
AMERICAN HARDWARE BROWNFIELDS SITE501 SOUTH MINT ST. & 526 SOUTH CHURCH ST.CHARLOTTE, NORTH CAROLINABROWNFIELDS PROJECT NO. 27028-23-060ECS PROJECT NO. 49:17189-B
SOURCE:
CHARLOTTE MECKLENBURG COUNTY GIS WEBSITE
ACCESSED APRIL 6, 2022
SCALE:
AS SHOWN
APPROXIMATE SITE BOUNDARY
LEGEND
APPROXIMATE GROUNDWATER SAMPLE LOCATION
FORMER KNIGHT
PUBLISHING SITE (REC)
TW-1
TW-2
TW-4
TW-3
FIGURE 3PROPOSED SAMPLE LOCATIONS – AERIAL MAP
AMERICAN HARDWARE BROWNFIELDS SITE501 SOUTH MINT ST. & 526 SOUTH CHURCH ST.CHARLOTTE, NORTH CAROLINABROWNFIELDS PROJECT NO. 27028-23-060ECS PROJECT NO. 49:17189-B
SOURCE:
CHARLOTTE MECKLENBURG COUNTY GIS WEBSITE
ACCESSED APRIL 6, 2022
SCALE:
AS SHOWN
APPROXIMATE SITE BOUNDARY
LEGEND
APPROXIMATE TEMPORARY MONITORING WELL LOCATION
APPROXIMATE PROPOSED SUB-SLAB SOIL GAS SAMPLE LOCATIONS
PROPOSED BUILDING
FOOTPRINTS
APPROXIMATE
FORMER AUTO
REPAIR AREA
APPROXIMATE
FORMER DYE AND
CHEMICAL
LABORATORY AND
WAREHOUSE AREA
APPROXIMATE SOIL BORING LOCATION
APPROXIMATE
CLOSED UST AREA
GW-1/
SB-1
GW-2/
SB-2
SB-3
SB-4
SB-5
SS-1
SS-2
SS-3
SS-5
SS-6
SS-7
SS-8
SS-9
SS-10
SS-11
FIGURE 4PROPOSED SAMPLE LOCATIONS – PLAN MAP
AMERICAN HARDWARE BROWNFIELDS SITE501 SOUTH MINT ST. & 526 SOUTH CHURCH ST.CHARLOTTE, NORTH CAROLINABROWNFIELDS PROJECT NO. 27028-23-060ECS PROJECT NO. 49:17189-B
SOURCE:
CHARLOTTE MECKLENBURG COUNTY GIS WEBSITE
ACCESSED APRIL 6, 2022
SCALE:
AS SHOWN
APPROXIMATE SITE BOUNDARY
LEGEND
APPROXIMATE TEMPORARY MONITORING WELL LOCATION
APPROXIMATE PROPOSED SUB-SLAB SOIL GAS SAMPLE LOCATIONS
PROPOSED BUILDING
FOOTPRINTS
APPROXIMATE
FORMER AUTO
REPAIR AREA
APPROXIMATE
FORMER DYE AND
CHEMICAL
LABORATORY AND
WAREHOUSE AREA
APPROXIMATE SOIL BORING LOCATION
APPROXIMATE
CLOSED UST AREA
GW-1/
SB-1
GW-2/
SB-2
SB-3
SB-4
SB-5
SS-1
SS-2
SS-3
SS-5
SS-6
SS-7
SS-8
SS-9
SS-10
SS-11
TABLE
Table 1
Proposed Samples & Analysis
American Hardware Brownfields Site
501 South Mint Street and 526 South Church Street
Charlotte, Mecklenburg County, North Carolina
Brownfields Project No.: 27028-23-060
ECS Project No.: 49:17189-B
Sub-Slab Soil Gas Samples
SS-1 Batch
SS-2 Batch
SS-3 Batch
SS-4 Batch
SS-5 Batch
SS-6 Batch
SS-7 Batch
SS-8 Batch
SS-9 Batch
SS-10 Batch
SS-11 Batch
SS-DUP Batch
Soil Samples
SB-1 NA
SB-2 NA
SB-3 NA
SB-4 NA
SB-5 NA
SB-DUP NA
GW-1 NA
GW-2 NA
GW-DUP NA
Equipment Blank NA
Trip Blank VOCs / EPA Method 8260 NA
Notes:
VOCs = Volatile Organic Compounds
SVOCs - Semi-Volatile Organic Compounds
Chromium VI = Hexavalent Chromium
DUP = Duplicate Sample
VOCs / EPA Method 8260
SVOCs / EPA Method 8270
Total RCRA Metals / EPA Method 6020/7470
Dissolved RCRA Metals / EPA Method 6020/7470
Groundwater Samples
Sample Media Laboratory Analysis / Analytical Method Batch / Individual Certified Summa
Canister
VOCs / TO-15
VOCs & SVOCs / EPA Method 8260 & 8270
Total RCRA Metals / EPA Method 6020/7470
Chromium VI / EPA Method 7199
APPENDIX A
Previous Groundwater Sampling Results
Summary of Groundwater Samples Analytical Results
Mint Street and Church Street Site
501 South Mint Street and 526 South Church Street
Charlotte, Mecklenburg County, North Carolina
ECS Project No.: 49:17189-B
SVOCs by EPA
Method 8270
2-HexanoneTrichlorofluoromethaneAll CompoundsNC2LGWQS 40 2,000 Various
NCDEQ - Groundwater Residential VISLs 1,600 NE Various
NCDEQ - Groundwater Non-Residential VISLs 6,900 NE Various
TW-1 06/11/22 6.7 1.5 BRL
TW-2 06/11/22 <5.0 <1.0 BRL
TW-3 06/11/22 <5.0 1.2 BRL
TW-4 06/11/22 <5.0 <1.0 BRL
Notes:
All results presented in micrograms per liter (mg/L)
Compounds not shown were not detected
VOCs = Volatile Organic Compounds
SVOCs = Semi-volatile Organic Compounds
NC2LGWQS = North Carolina 2L Groundwater Quality Standards (October 2020)
NCDEQ = North Carolina Department of Environmental Quality
VISLs = NCDEQ Groundwater Vapor Intrusion Screening Levels (January 2022)
NE = No Standard Established
BRL = Below Reporting Limit
VALUE = concentration greater than the laboratory method reporting limit
Sample DateSample ID
VOCs by EPA Method 8260
APPENDIX B
NCDEQ Brownfields Property Receptor Survey/Checklist
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.
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
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
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.
Water Supply
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?
* 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
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)
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
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
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.
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.
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.
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
Rev. 09/2015 Page 3 of 3