25034_N Tryon Assemble_BAR WP_Approval 20221027

#C-1269 Engineering #C-245 Geology
Brownfields Assessment Work
Plan Revision No. 2
Tryon Assemblage
125 Matheson Ave.;
2700, 2726, 2800, 2832 N. Tryon Street
Charlotte, North Carolina
Brownfields Project No. 25034-21-060
H&H Job No. AMK-022
July 29, 2022
07/29/22
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Brownfields Assessment Work Plan
Revision No. 2

Site Information:
North Tryon Assemblage
125 Matheson Ave.; 2700, 2726, 2800, 2832 N. Tryon Street
Charlotte, North Carolina

Brownfields Project No.:
25034-21-060

Date of Plan/Revision:
July 13, 2022

Firm PE/PG License Nos.:
#C-1269 Engineering
#C-245 Geology

Developer:
Flywheel Group, LLC
4100 Raleigh Street
Charlotte, NC 28213
Anthony (Tony) Kuhn
[phone]

Consultant/PM:
Hart & Hickman, PC
2923 S. Tryon Street, Ste 100
Charlotte, NC 28203
Attn: Stephen Libbey
[phone]
[e-mail]

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Brownfields Assessment Work Plan
Revision No. 2
North Tryon Assemblage
125 Matheson Ave.; 2700, 2726, 2800, 2832 N. Tryon Street
Charlotte, North Carolina
Brownfields #25034-21-060
H&H Job No. AMK-022

Table of Contents

1.0 Introduction .............................................................................................................................1 
2.0 Scope of Work .......................................................................................................................12 
3.0 Sampling Methodology .........................................................................................................13 
3.1 Soil Sampling Activities ......................................................................................................13 
3.2 Groundwater Assessment Activities ....................................................................................14 
3.3 Soil Gas Sampling Activities ...............................................................................................15 
4.0 Laboratory Analyses .............................................................................................................19 
5.0 Quality Assurance – Quality Control ..................................................................................20 
6.0 Investigation Derived Waste (IDW) Management.............................................................21 
7.0 Reporting ...............................................................................................................................22 

List of Tables
Table 1 Proposed Sample Summary Table

List of Figures
Figure 1 Site Location Map
Figure 2 Site Map and Proposed Sample Locations Map

List of Appendices
Appendix A Redevelopment Renderings and Grading Plan
Appendix B Previous Assessment Data Tables and Figures
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Brownfields Assessment Work Plan
Revision No. 2
North Tryon Assemblage
125 Matheson Ave.; 2700, 2726, 2800, 2832 N. Tryon Street
Charlotte, North Carolina
Brownfields #25034-21-060
H&H Job No. AMK-022

1.0 Introduction

On behalf of Flywheel Group, LLC, Hart & Hickman, PC (H&H) is providing this Brownfields
Assessment Work Plan (Work Plan) for the North Tryon Assemblage Brownfields property
located at assemblage of industrial/commercial properties located at 2700, 2726, 2800, 2832, and
2920 N. Tryon Street and 125 Matheson Avenue in Charlotte, Mecklenburg County, North
Carolina (Site). The assemblage is identified with Brownfields Project Number 25034-21-060.
A Site location map is provided as Figure 1, and the Site and surrounding area are shown in
Figure 2.

The Site consists of six parcels of land (Mecklenburg Parcel ID No. 08302203, 08302201,
08302202, 08303135, 08303134, and 08303133) that totals approximately 15.5 acres of land
developed with the following six (6) industrial/commercial properties:

 125 Matheson Avenue (Parcel #08302203) – an approximate 1.81-acre parcel developed
with a modular office trailer and most recently occupied by Lightning Transportation for
tractor trailer storage;
 2700 N. Tryon Street (Parcel #08302202) – an approximate 0.61-acre parcel of land most
recently developed with a Sam’s Xpress Mart gas station/convenience store. The
convenience store was razed, and the underground storage tanks (USTs) were removed in
November 2021;
 2726 N. Tryon Street (Parcel #08302201) – an approximate 0.3-acre parcel developed
with a vacant 3,200-square ft two-bay service garage built in 1940;
 2800 N. Tryon Street (Parcel # 08303135) – an approximate 4.02-acre parcel developed
with a 9,344-square ft office/warehouse built in 1945 and a 4,736-square ft warehouse
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built in 1947. This property is currently occupied by Queen City Metal Recycling &
Salvage (formerly Burgess Transport and Gilbert Iron and Steel) and operates as a scrap
metal salvage yard;
 2832 N. Tryon Street (Parcel #08303134) – an approximate 0.816-acre parcel developed
with an 1,827-square ft gas station/convenience store constructed in 1969 and most
recently occupied by the Race Track/Grand Prix – North End (formerly McGuirts
BP/Amoco #528) convenience store/gas station. The convenience store was razed, and
the USTs were removed in September 2021; and,
 2920 N. Tryon Street (Parcel #08303133) – an approximate 7.9-acre parcel developed
with 197,145 square ft two-story office and warehouse building built in 1957. This
property is currently occupied by a tape distributor and formerly utilized for distribution
of furniture and electronics (Allison Erwin), grocery items, and general merchandise
(Bargain Max and others).

Proposed redevelopment of the Brownfields property includes mixed-use office, retail, and
residential. As part of redevelopment, adaptive re-use of the Allison Erwin warehouse building
is planned. No cut and fill maps are currently available for the planned Site redevelopment.
However, based on the available redevelopment renderings and the grading plan provided in
Appendix A, it is anticipated that soils will be imported to raise the ground surface
approximately 3 to 16 ft above existing grade in the southeastern portion of the Site. No export
soils will be needed. Furthermore, it is anticipated that only the top 5 ft of native soils will be
disturbed during Site grading and redevelopment. This Work Plan has been prepared to
complete additional assessment activities to further evaluate risks associated with redevelopment
of the Site. A summary of background information and previous assessment activities conducted
is provided below.

March 2021 Phase I ESA
In March 2021, H&H completed Phase I ESA activities and identified the following Recognized
Environmental Conditions (RECs) in connection with historical operations at the Site:

 Racetrack/Grand Prix – North End Gas Station (2832 N. Tryon Street). A petroleum
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release (Incident #6602) has been reported on the Race Track/Grand Prix – North End
gas station that has impacted groundwater below the northeastern portion of the subject
Site. The petroleum release was discovered in July 1989 during removal of four (4) x
4,000-gallon gasoline USTs. A groundwater pump and treat remediation system was
installed and operated at the Site between 1991 and 1996. After the Site was classified as
“low risk,” the remediation system was shut down. In May 1998, the Site was
reclassified as “intermediate risk” when benzene concentrations exceeded NC
Department of Environmental Quality (DEQ) Gross Contamination Levels (GCLs).
Groundwater at the Site is currently being monitored for natural attenuation.

The petroleum plume extends beyond the gas station property to the adjacent Queen City
Metal Recycling & Salvage and Allison Erwin Co. properties. During the most recent
annual groundwater sampling event conducted at the Site in September 2021, free
product was not detected in the monitoring wells installed at the Site and nearby
properties. Benzene and methyl tert-butyl ether (MTBE) were detected in source area
well MW-6 at concentrations above DEQ GCLs of 5,000 ug/L and 20,000 ug/L,
respectively. In September 2021, the former gasoline USTS were removed from the Site
along with 368 tons of petroleum impacted soil. Additional information regarding the
UST closure activities is presented further below.

H&H has identified the presence of petroleum-impacts in groundwater at the Site and on
the adjacent properties to be a Controlled Recognized Environmental Condition (CREC)
with the revised Notice of Residual Petroleum (NRP) and the continued presence of the
existing groundwater use restriction on this parcel.

 Queen City Metal Recycling & Salvage (2800 N. Tryon Street). A petroleum release
(Incident #17697) was discovered during removal of three (3) USTs (6,000-gallon diesel
UST, 7,500-gallon diesel UST, and 1,000-gallon heating oil UST) from the Queen City
Metal Recycling & Salvage (2800 N. Tryon Street) property in August 1997. During
completion of a Phase I and II Limited Site Assessment (LSA), petroleum-impacted soil
was not detected at concentrations above DEQ Industrial/Commercial Maximum Soil
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Contaminant Concentrations (MSCCs). Petroleum-impacted-groundwater was detected
at concentrations above NCAC 2L Groundwater Quality Standards (2L Standards), but
below DEQ GCLs. DEQ closed the release incident in August 2004 after a NRP was
placed on the Queen City Metal Recycling & Salvage property restricting residential
development at the Site (industrial/commercial development only) and restricting
groundwater use at the Site as a water supply.

A second release incident (Incident #27781) was reported at the Site during removal of a
heating oil UST from a location adjacent to the former trucking terminal building in July
2004. Groundwater contamination was not reported associated with the removal of the
heating oil UST and DEQ closed this release incident in August 2004. The original NRP
for this property also covers this second release incident.

H&H identified the presence of petroleum-impacts in groundwater and soil on the Queen
City Metal Recycling & Salvage property associated with Incident #17697 and the
existing of restrictions on future residential redevelopment and groundwater use to be a
CREC. Due to the closed status, H&H did not recommend further assessment of closed
UST release incident or the former tanks that had been removed from the Queen City
Metal Recycling & Salvage property.

During Phase I and II ESA activities conducted at the Site in June and September 2013,
respectively, additional soil and groundwater sampling activities were conducted in the
northeastern portion of the Queen City Metal Recycling & Salvage property to further
assess the former UST basins and the adjacent Race Track/Grand Prix gas station
property. The results of the 2013 Phase II ESA soil sampling activities reported diesel
and gasoline-range total petroleum hydrocarbons (TPH-DRO and TPH-GRO) at
concentrations below current DEQ Action Levels. Arsenic concentrations detected in
soil samples exceeded the current DEQ Residential Preliminary Soil Contaminant
Concentrations (PSRGs) but appear to be consistent with North Carolina published
background concentrations reported for arsenic. Chromium was also detected in soil
samples; however, the additional analyze was not performed sufficient to speciate the
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chromium detections (e.g., hexavalent and trivalent chromium) for comparison to DEQ
PSRGs.

The results of the 2013 Phase II ESA groundwater sampling activities reported
concentrations of MTBE (likely a result of the Race Track/Grand Prix – North End gas
station release incident), barium, cadmium, chromium, lead, and mercury at
concentrations above 2L Standards, but below DEQ GCLs.

 Sam’s Xpress Mart Gas Station (2700 N. Tryon Street). A release incident (#15792) was
reported at the current Sam’s Xpress Mart #37/Exxon gas station (former Brinson Diesel
Sales and Service facility) located in the southwestern portion of the Site (2700 N. Tryon
Street) in 1995/1996. In January 2000, TPH-GRO was detected in soil at concentrations
as high as 9,410 mg/kg and above the current DEQ Action Level during removal of four
USTs (1,000-gallon diesel UST, 5,000-gallon gasoline UST, and two former 10,000-
gallon USTs) from gas station property and were cleaned up to concentrations below
DEQ residential MSCCs. Benzene was reported in groundwater at concentrations as high
as 11,300 micrograms per liter (µg/L) and greater than 2L Standard of 1 µg/L and the
GCL of 5,000 µg/L. The chlorinated solvent trichloroethylene (TCE) has also been
detected in groundwater at the Sam’s Mart Xpress at a concentration as high as 5 µg/L,
which is above the current 2L Standard of 3 µg/L. After excavation of approximate 344
tons of petroleum-impacted soil and completion of Phase I LSA activities at the gas
station, DEQ closed the release incident in November 2000 after restricting groundwater
use on this property. H&H considers closure of release incident #15792 with restrictions
on groundwater use on this property as a CREC.

H&H also identified the following potential environmental concerns (PECs) in connection with
the Site, which based upon our review, are not considered to be RECs but which may warrant
Phase II ESA sampling to rule them out as potential risk to the Site.

 Econo Auto Painting (2710 N. Tryon Street). Econo Auto Painting operates an
automobile paint and body shop on property located adjacent, west-northwest, and
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topographically upgradient of the subject Site at the address 2710 N. Tryon Street.
Although a release incident has not been reported at the adjacent body shop, the facility is
identified as a conditionally exempt small quantity generator (CESQG) of ignitable
(D001), methyl ethyl ketone (D035), and spent non-halogenated solvent (F003/005)
hazardous waste. H&H did not locate record of a Resource Conservation and Recovery
Act (RCRA) violation or release incident associated with the auto shop. Due to the lack
of a release incident or reported violation, operations associated with the off-Site auto
shop are not considered to be an REC.

 Vacant Service Garage (2726 N. Tryon Street). The on-Site vacant service garage
located on-Site at 2726 N. Tryon Street previously operated as a truck and trailer repair
service facility from 1949 until the mid-1980s. During H&H’s inspection of the facility,
we did not identify obvious evidence of floor drains, sumps, inground hydraulic lifts,
septic systems, USTs, or ASTs and none were reported by the Site contact or identified
on environmental databases in the EDR report. Based on this information, H&H did not
consider operations associated with the on-Site former truck and trailer service garage to
be an REC.

 Former McLaurin Trucking (a.k.a. Graham Station, 2600 N. Tryon Street). Former
McLaurin Trucking is located approximately 100 ft southwest and topographically cross-
gradient of the subject Site. According to information provided on the databases, soil and
groundwater contamination was discovered at the former trucking facility during removal
of a 10,000-gallon diesel UST and two 5,000-gallon diesel USTs from the southeastern
portion of the property in March 1994. The release incident (Incident #12196) was
closed in August 1998.

A second release incident (Incident #20986) was discovered at the former McLaurin
Trucking facility during removal of three diesel USTs (one 4,000-gallon and two 5,000-
gallon petroleum USTs) from the property in December 1998. Soil and groundwater
contamination was reported during assessment of the second release incident and DEQ
closed the second release incident in December 1999, although reporting groundwater
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contamination exists in groundwater on the former McLaurin Trucking property.
During groundwater assessment activities, 1,2-dichloroethane (1,2-DCA, 20 µg/L) was
detected in an upgradient monitoring well DMW-3 at a concentration above the current
2L Standard of 0.4 µg/L. DMW-3 was located approximately 150 ft southwest and
topographically cross-gradient of the subject Site. The source of the 1,2-DCA detection
in the DMW-3 groundwater sample on the McLaurin Trucking property was thought to
be from an off-site and upgradient source. H&H reviewed groundwater data collected on
the Sam’s Xpress Mart located across Matheson Avenue and noted that 1,2-DCA was
also detected in groundwater on the gas station property at concentrations as high as 65
µg/L indicating impacts to groundwater from an upgradient source have also impact the
subject Site.

Allison Erwin Phase I ESA
The Allison Erwin property was added to Brownfields Site assemblage after completion of the
Phase I ESA discuss above. In February 2021, ECS Southeast, LLP (ECS) completed Phase I
ESA activities and identified the following RECs in connection with historical operations at the
Allison Erwin property:

 A 10,000-gallon fuel oil UST was removed from the property at some time in the past
and no closure documentation was available. The potential for impact from an
undocumented release or releases associated with the UST represents an REC.

 Hydraulic fluid was reported in the elevator pit. The potential for impact from an
undocumented release or releases associated with the elevator represents an REC.

 Based on documented groundwater and surface water impacts above standards, the
potential for chlorinated solvents to migrate onto the property from the Detrex Chemicals
property to the south represents an REC. A shallow and deeper monitoring well pair
(MW-12A/MW-12B) were installed on the Allison Erwin property to delineate the
Detrex release. The approximate location of the well pair is depicted on Figures 2 and 3
and available pertinent sampling data for these wells are provided in Appendix B.
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 Based on historical soil and groundwater impacts at the Queen City Metal Recycling &
Salvage property and the potential for impacts from this property, ECS considers the
Queen City Metal Recycling & Salvage to be an REC. In addition, ECS personnel
observed petroleum impacted water discharging onto the property from the Queen City
Metal Recycling & Salvage property.

 Former UST operation and know releases on the adjacent properties to the northwest
(Racetrack/Grand Prix – North End Gas Station) and northeast (unknown name) and the
off-Site properties to the north (AT&T and Fleishman’s Vinegar) represent RECs.

2021 Phase II ESA Activities
In April 2021, H&H performed Phase II ESA activities at the Site. Assessment activities
included the advancement of nine (9) soil borings near areas of concern (i.e., metal sorting area,
existing fill and soil pile area, USTs, and truck repair area) and one background soil boring.
Assessment activities also included groundwater sample collection from four (4) temporary
monitoring wells located downgradient of the current and historical operations at Queen City
Metal Recycling & Salvage, downgradient of the on-Site vacant service garage and the off-Site
Econo Auto Paining automobile body shop, and downgradient of the Sam’s Xpress Mart. Soil
boring and temporary well locations from the 2021 Phase II ESA are depicted in Figure 2, and
data tables and a figure from the Phase II assessment are provided in Appendix B. A brief
summary of the Phase II assessment activities is provided below.

 The PAH benzo(a)pyrene was detected in the SB-4 soil sample collected within a fill/soil
pile, and in the SB-5 soil sample collected in the drum storage area, at concentrations
above the Residential PSRG and Residential MSCC. None of the remaining volatile
organic compounds (VOCs) or Semi-VOCs analyzed exceeded Residential or
Industrial/Commercial PSRGS or MSCCs.

 Multiple VOCs and/or SVOCs were detected at concentrations above either Protection of
Groundwater PSRGs or Soil to Water MSCCs (but below Residential PSRGs or MSCCs)
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in the SB-1, SB-3, SB-4, SB-5, SB-6, and the SB-9 soil samples.

 Lead was detected in the SB-3 soil sample collected within a fill/soil pile at a
concentration above the Industrial/Commercial PSRG. Lead was also detected in the SB-
2 soil sample collected in the metal sorting area at a concentration above the Residential
PSRG. These lead concentrations are above those reported in the background sample and
above the published range of background concentrations for North Carolina soil.

 Arsenic was detected at concentrations above the Industrial/Commercial PSRG in all of
the soil samples analyzed for metals (SB-1 to SB-6). However, the detected arsenic
concentrations are within the published range of background concentrations for North
Carolina soil and appear to be consistent with the arsenic concentration reported in the
SB-BG background sample.

 Hexavalent chromium was detected at concentrations above the residential PSRG but
below the industrial/commercial PSRG in soil samples SB-1, SB-2, SB-3, SB-4, and SB-
6. However, the detected hexavalent chromium concentrations appear to be consistent
with the concentration reported in the SB-BG background sample.

 Acetone was detected in the TMW-1, TMW-2, and TMW-3 groundwater samples as
estimated J flag values at concentrations below the 2L Standard. Acetone was also
detected in the Trip Blank and appears to be a possible laboratory decontamination
artifact.

 Laboratory analytical results did not indicate the presence of any additional VOCs or
PAHs at concentrations above laboratory method detection limits in the groundwater
samples collected at the Site.

 Arsenic was detected in the TMW-1 groundwater sample collected in the southeastern
portion of the Queen City Metal Recycling & Salvage property at a concentration above
its 2L Standard. Barium and lead were also detected in the TMW-1 groundwater sample
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but at concentrations below 2L Standards. Laboratory analytical results did not indicate
the presence of metals at concentrations above laboratory method detection limits in the
TMW-1 groundwater sample.

Racetrack/Grand Prix – North End Gas Station UST Closure Activities
In September 2021, H&H oversaw the removal of the three existing 10,000-gallon gasoline
USTs and associated product piping at the Racetrack/Grand Prix – North End Gas Station.
Based on field screening, no impacts were suspected in the pea gravel surrounding the USTs,
product piping, and dispenser sumps. The results of analysis of the closure samples collected
from one UST basin sidewall sample and one product line sample indicated that TPH-GRO was
detected above the North Carolina Action Level.

Due to the intended future residential land use of the property, approximately 368 tons of
impacted soils were excavated from three excavation areas. The soil impacts appeared to be
related to past UST system releases and not releases from the recently removed fiberglass UST
system. Results of post-excavation confirmation soil sampling indicated VOC concentrations
above DEQ soil-to-groundwater MSCCs, but below residential and commercial/industrial
MSCCs.

DEQ issued a no further action (NFA) letter dated November 29, 2021, for the fiberglass UST
system removed in 2021. Incident #6602 associated with a release from the former UST system
at the property remains open for groundwater impacts above GCLs only. A NRP restricting
groundwater usage at the property is currently being finalized and will be filed with the property
deed.

Sam’s Xpress Mart Gas Station UST Closure Activities
In November 2021, one 10,000-gallon gasoline UST, one 10,000-gallon diesel UST, one 5,000-
gallon gasoline UST, one 5,000-gallon diesel UST, and one 12,000-gallon gasoline UST were
removed from the Sam’s Xpress Mart Gas Station by others. The results of analyses of closure
soil samples indicated that TPH-DRO and TPH-GRO were detected above the North Carolina
Action Levels. Additionally, petroleum hydrocarbons were also detected above soil-to-
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groundwater MSCCs, but below residential and commercial/industrial MSCCs in several closure
samples.

A Phase I LSA was completed for the UST release in April 2022. The results of analyses of
Phase I LSA soil samples indicated petroleum hydrocarbons above soil-to-groundwater MSCCs,
but below residential or commercial/industrial MSCCs. Additionally, petroleum hydrocarbons
were detected in groundwater at concentrations above 2L Standards, but below DEQ GCLs.

As part of the Phase I LSA, a receptor survey by vehicular reconnaissance was completed within
approximately 1,500 feet of the source area. No water supply wells were identified during the
vehicular survey.

Based on the results of the Phase I LSA, the responsible party recently requested DEQ issue an
NFA for the UST release. DEQ prepared a conditional NFA letter for the release dated April 28,
2022. As part of the conditional NFA, a NRP restricting groundwater usage at the property will
be filed with the property deed. The NRP is currently be prepared by Sam’s Mart, Inc.

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2.0 Scope of Work

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 30, 2021. Due to the addition of the Allison Erwin property to the Site, a
revised eligibility application was sent to DEQ, and an amended eligibility letter was prepared by
DEQ on January 26, 2022. The PD elected to participate in the Brownfields Program
Redevelopment Now option. As part of this process, an initial kick-off/data gap meeting with
PD, environmental counsel for the PD, DEQ Brownfields personnel, and H&H was held on May
5, 2021 to discuss prior Site history, proposed redevelopment plans, previous sampling data, and
the proposed schedule for completing the Brownfields Agreement. A second meeting was
conducted on February 4, 2022, based on the addition of the Allison Erwin property and to
update DEQ with recent activities conducted at the Site.

The purpose of the Brownfields assessment activities described herein are proposed to address
DEQ Brownfields Program requests provided during the February 2022 kick-off meeting and in
recent emails and discussions. The assessment activities include the collection of thirteen (13)
soil samples, two (2) groundwater samples, two (2) exterior soil gas samples, and nine (9) sub-
slab soil gas samples to further assess the potential risks to Site workers and future Site
occupants and close data gaps discussed with DEQ. A tabular summary of proposed sample
depths, objectives, and laboratory analyses are summarized in Table 1. A summary of the
proposed Brownfields assessment activities is provided below.
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3.0 Sampling Methodology

The proposed assessment activities will be performed in general accordance with the DEQ
Inactive Hazardous Sites Branch (IHSB) Guidelines for Assessment and Cleanup of
Contaminated Sites (Guidelines) dated July 2021, the DEQ Division of Waste Management
(DWM) Vapor Intrusion Guidance (VI Guidance) dated March 2018, Brownfields Program
Environmental Site Assessment Work Plan Checklist dated February 2022, and the most recent
versions of the U.S. Environmental Protection Agency (EPA) Region IV Laboratory Services
and Applied Science Division (LSASD) 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, boring locations will be hand
cleared to approximately 5 ft below ground surface (bgs) prior to use of mechanical drilling
equipment to further screen the boring locations for the presence of subsurface utilities.

3.1 Soil Sampling Activities

H&H will conduct soil sampling as part of the Brownfields assessment activities. The purpose
of the soil sampling is to address DEQ Brownfields Program request to evaluate the potential for
soil impacts and characterize surficial soils on the Lightning Transportation (125 Matheson
Avenue) and Allison Erwin (2920 N. Tryon Street) properties. The location of the proposed soil
borings is shown in Figure 2, and the proposed soil sample depths and laboratory analyses are
summarized in Table 1.

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). Four (4)
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soil borings (SB-10 through SB-14) will be advanced to approximately 5 ft bgs on the Lightning
Transportation Property to assess surficial soils. An additional nine (9) soil borings (SB-14
through SB-22) will be advanced to depths ranging from approximately 5 to 15 ft bgs on the
Allison Erwin Property to assess surficial soils (SB-14 through SB-19), two interior building
elevators (SB-20 and SB-21), and the former fuel oil UST (SB-22). Based upon field
observations, thirteen (13) soil samples will be collected for laboratory analysis from the depth
interval with the highest potential for impacts. If no obvious impacts are observed during field
screening, a sample will be collected from the 0-1 ft bgs depth interval or the depth interval
immediately below the target Site feature.

Following sampling activities, soil borings will be properly abandoned, and the surface 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.

3.2 Groundwater Assessment Activities

H&H will contract a qualified drilling contractor to advance a boring for the installation of a
temporary groundwater monitoring well (TMW-5) at the Site. The purpose of the temporary
groundwater monitoring well will be to evaluate current groundwater conditions at the former
service garage located at 2726 North Tryon. A groundwater sample will also be collected from
existing shallow monitoring well PMW-12A located on the Allison Erwin property. The
approximate location of the proposed temporary monitoring well TMW-5 and PMW-12A are
shown on Figures 2 and 3.

During drilling of TMW-5, soil cuttings will be collected and logged for lithologic description
and field screened for the presence of staining and elevated volatile organic vapors using a PID.
The temporary monitoring well will be constructed of 1-inch diameter PVC with 15 ft of pre-
pack well screen set to bracket the water table and 1-inch diameter PVC well casing to the
ground surface. Once the temporary monitoring well is installed, the well will be allowed to
equilibrate to static conditions and a decontaminated electronic water level indicator will be used
to measure the depth to the water table relative to the ground surface. The wells will then be
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developed by removing a minimum of 3 to 5 well volumes and field parameters (pH ± 0.1 SU
and conductivity varies no more than 5%) have stabilized.

After development of TMW-5, a groundwater sample will be collected from TMW-5 and PMW-
12A 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 wells and groundwater will be removed at a rate no greater
than 200 milliliters per minute. H&H will utilize a water quality meter to collect measurements
of pH, temperature, dissolved oxygen, oxidation reduction potential, turbidity, and specific
conductivity at 3 to 5-minute intervals during the purging process. Purging will be considered
complete when the parameters stabilize (pH ± 0.1 SU, conductivity varies no more than 5%, and
turbidity is less than 10 NTUs). In the event that turbidity of less than 10 NTUs cannot be
achieved, H&H will filter the groundwater sample in the field using a 0.45-micron filter and
submit an unfiltered and filtered groundwater sample for laboratory analysis of dissolved metals

Once groundwater parameters stabilize, the groundwater samples will be collected directly into
laboratory supplied sample containers using the “soda straw” method to minimize volatile loss
through the peristaltic pump head. The sample containers will be labeled with the sample
identification, date, and requested analysis, and placed in a laboratory supplied cooler and iced.

Following sample collection, TMW-5 will be properly abandoned by a licensed well driller. The
monitoring well locations will be estimated using a sub-meter GPS unit.

3.3 Soil Gas Sampling Activities

To evaluate the potential for structural vapor intrusion, H&H will collect two (2) temporary
exterior soil gas monitoring points and nine (9) sub-slab soil gas samples from all existing
former building slabs and all existing buildings on-Site. The approximate locations of the
proposed exterior soil gas and sub-slab soil gas sampling points are shown on Figures 2 and 3,
and a tabular summary of proposed exterior soil gas and sub-slab soil gas sampling points are
summarized in Table 1. Sampling activities are described below.
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Exterior Soil Gas Sample Points
Two (2) temporary exterior soil gas monitoring points (SG-1 and SG-2) will be installed within
the footprint of the proposed buildable area (Figure 3). The soil gas monitoring points will be
installed at depths greater than 5 ft bgs and above the estimated depth to the water table capillary
fringe. Based on the anticipated depth to water at the Site (10-12 ft bgs) it is anticipated that the
soil gas points will be installed to a depth of approximately 6 ft bgs. The soil gas point borings
will be advanced 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 a length of 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.

Sub-Slab Soil Gas Sample Points
H&H proposes to install nine (9) sub-slab soil gas sample points (SSV-1 through SSV-9) from
all existing former building slabs and all existing buildings on-Site. The sub-slab soil gas sample
locations shown in Figures 2 and 3 may be adjusted to 1) minimize damage to floors or floor
coverings, and 2) to analyze sub-slab conditions in areas separated by building footers if
indications of building footers are observed during field sample location selection.

The sub-slab soil gas 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 slab surface. A drill guide will then be placed within the pilot hole, and a 5/8-
inch diameter drill bit will be utilized to advance a boring through the concrete slab and
approximately 6-inches into the underlying soil. Following borehole advancement, loose
concrete cuttings will be removed from each boring, and a Cox-Colvin Vapor PinTM (vapor pin)
assembly (brass sampling point and silicone sleeve) will be seated in the borehole using an
installation/extraction tool and dead blow hammer to form an airtight seal.

Soil Gas Sampling
The soil gas and sub-slab samples will be collected utilizing a laboratory supplied batch certified
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stainless-steel Summa® canister (1-liter 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 milliliters per minute. Prior to sample collection, a “shut-in” test will
be conducted on the sampling train and helium leak checks will be conducted at each sampling
point. The purpose of the shut-in test and helium leak check is to ensure 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
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 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 a successful leak check, the intake valve on the Summa® canister will be fully opened
to begin collection of the soil gas sample. 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 of approximately 5 inches of mercury or more will be maintained within
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the canisters at the conclusion of the sampling event in accordance with DEQ DWM guidance.

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 of approximately 5 inches of mercury or more will be
maintained within the canisters at the conclusion of the sampling event in accordance with DEQ
DWM guidance. Following sample collection, the Summa® canisters will be shipped to a
certified laboratory under standard chain-of-custody protocols for analysis.

After sampling is complete, the sample locations will be estimated using a hand-held GPS unit or
by measuring from known benchmarks within the buildings (e.g., doors, windows, exterior walls,
etc.), and the sample locations will be abandoned with surfaces repaired similar to pre-drilling
conditions.

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4.0 Laboratory Analyses

The 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 sample will be delivered to a North Carolina
certified laboratory under standard chain of custody protocols for laboratory analyses. Soil and
groundwater samples will be analyzed for VOCs by EPA Method 8260, semi-VOCs by EPA
Method 8270, RCRA metals by EPA Methods 6020/7471/7470. Soil samples will also be
sampled for hexavalent chromium by EPA Method 7199. Soil gas samples will be analyzed for
VOCs by EPA Method TO-15.

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 submitted to 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 and shipping receipt
will be appended to the corresponding laboratory analytical report included with the final report.

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5.0 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 will be collected and analyzed for VOCs, SVOCs,
RCRA Metals, and hexavalent chromium (soil only).
 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.
 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.

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.

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6.0 Investigation Derived Waste (IDW) Management

Investigation derived waste (IDW) generated during the proposed assessment activities is
expected to be minimal and will be placed back in the holes or 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.

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7.0 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 Site activities, rationale for potential deviations from the work plan (if warranted),
a figure depicting sample locations, tabular summaries of the new and historical sampling data,
borings logs, laboratory analytical data, a discussion of the data in comparison to regulatory
screening levels, cumulative risk calculations for sub-slab soil gas analysis (if warranted based
upon the data), available redevelopment plan overlays with sampling data from all historical
sampling events, and conclusions and recommendations concerning our activities.

Table 1
Proposed Sample Summary Table
Assemblage at N. Tryon Street and Matheson Avenue
2700-2920 North Tryon Street and 125 Matheson Avenue
Charlotte, North Carolina
H&H Project No. AMK-022
SB-10 through SB-13 Soil Lightning Transportation 5 0-1 4 VOCs (8260), SVOCs (8270), RCRA Metals
6020/7471, Hexavalent Chromium (7199)
SB-14 through SB-19 Soil Allison Erwin 5 0-1 6 VOCs (8260), SVOCs (8270), RCRA Metals
6020/7471, Hexavalent Chromium (7199)
SB-20 and SB-21 Soil Allison Erwin 10 9-10 2 VOCs (8260), SVOCs (8270), RCRA Metals
6020/7471, Hexavalent Chromium (7199)
SB-22 Soil Allison Erwin 15 13-15 1 VOCs (8260), SVOCs (8270), RCRA Metals
6020/7471, Hexavalent Chromium (7199)
TMW-5 Groundwater 2726 North Tryon Vacant Garage 20 10-15 1 VOCs (8260), SVOCs (8270), RCRA Metals 6020/7470
PMW-12A Groundwater Allison Erwin 20 (est.)10-15 (est.)1 VOCs (8260), SVOCs (8270), RCRA Metals
6020/7470
SG-1 Soil Gas Vapor Queen City Metal Recycling 6 5-6 1 VOCs (TO-15)
SG-2 Soil Gas Vapor Lightning Transportation 6 5-6 1 VOCs (TO-15)
SSV-1 Sub-Slab Vapor Sams Xpress Mart vapor pin vapor pin 1 VOCs (TO-15)
SSV-2 Sub-Slab Vapor 2726 N. Tryon Street Service Garage vapor pin vapor pin 1 VOCs (TO-15)
SSV-3 and SSV-4 Sub-Slab Vapor Queen City Metal Recycling vapor pin vapor pin 2 VOCs (TO-15)
Sample IDs Approximate Boring
Depth (ft)
Number of
Samples Laboratory AnalysisSample LocationSample Type Approximate
Sample Depth (ft)
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Table 1 (Page 1 of 1)
Hart & Hickman, PC
Table 1
Proposed Sample Summary Table
Assemblage at N. Tryon Street and Matheson Avenue
2700-2920 North Tryon Street and 125 Matheson Avenue
Charlotte, North Carolina
H&H Project No. AMK-022
Sample IDs Approximate Boring
Depth (ft)
Number of
Samples Laboratory AnalysisSample LocationSample Type Approximate
Sample Depth (ft)
SSV-5 Sub-Slab Vapor Former Grand Prix Convenience Store vapor pin vapor pin 1 VOCs (TO-15)
SSV-6 through SSV-9 Sub-Slab Vapor Allison Erwin vapor pin vapor pin 4 VOCs (TO-15)
SB-DUP Soil NA 0-1 1 VOCs (8260), SVOCs (8270), RCRA Metals 6020/7471, Hexavalent Chromium (7199)
SSV-DUP Sub-Slab Vapor vapor pin vapor pin 1 VOCs (TO-15)
TMW-DUP Groundwater 20 10-15 1 VOCs (8260), SVOCs (8270), RCRA Metals 6020/7470
Trip Blank Groundwater NA NA 1 VOCs (8260)
Notes:
The EPA method number follows the laboratory parameter in parenthesis in the table above.
VOCs = Volatile Organic Compounds; SVOCs = Semi-VOCs; RCRA = Resource Conservation and Recovery Act
ft = feet; QA/QC = Quality Assurance/ Quality Control; NA = Not Applicable
QA/QC
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Table 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, andNational Transportation Dataset; USGS Global Ecosystems; U.S. CensusBureau TIGER/Line data; USFS Road Data; Natural Earth Data; U.S.Department of State Humanitarian Information Unit; and NOAA NationalCenters for Environmental Information, U.S. Coastal Relief Model. Datarefreshed August, 2021.
SITE LOCATION MAP
2726-2832 N. TRYON STREET AND125 MATHESON AVENUECHARLOTTE, NORTH CAROLINA
DATE: 2-16-22
JOB NO: AMK-022
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
TITLE
PROJECT
0 2,000 4,000
SCALE IN FEET
SITE
Path: S:\AAA-Master Projects\Anthony Kuhn (Flywheel) - AMK\AMK-022 2726-2832 N Tryon and 125 Matheson Ave\Brownfields\Workplan\Figures\Figure-1.mxdN
U.S.G.S. QUADRANGLE MAP
DERITA, NORTH CAROLINA 2019CHARLOTTE EAST, NORTH CAROLINA 2019
QUADRANGLE7.5 MINUTE SERIES (TOPOGRAPHIC)
SB-6
SB-7
SB-5
SB-1
SB-2
SB-3
SB-4
TMW-1
TMW-2
TMW-3
SB-8
SB-9
TMW-4
SB-BG
SB-22
SSV-8
SSV-7
SSV-6
SSV-9
SSV-5
SSV-4
SSV-3
SSV-2
SSV-1
SB-16
SB-15
SB-20
SB-21
SB-19
SB-18
SB-14
SB-17
SB-10
SB-11
SB-12
SB-13
SG-2
SG-1
TMW-5
REVISION NO. 0
JOB NO. AMK-022
DATE: 7-25-22
FIGURE NO. 2
2726-2832 N. TRYON STREET AND
125 MATHESON AVENUE
CHARLOTTE, NORTH CAROLINA
SITE AND PROPOSED SAMPLE
LOCATIONS MAP
LEGEND
SITE PROPERTY BOUNDARY
PARCEL BOUNDARY
SURFACE WATER FEATURE
O2 AST
TEMPORARY MONITORING WELL
LOCATION
EXISTING SOIL BORING LOCATION
APPROXIMATE EXISTING MONITORING
WELL LOCATION
PROPOSED SOIL BORING LOCATION
PROPOSED TEMPORARY MONITORING
WELL LOCATION
PROPOSED SUB-SLAB VAPOR SAMPLE
LOCATION
PROPOSED SOIL GAS SAMPLE
LOCATION
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
PETROLEUM STORAGE
FORMER OFFICE /
WAREHOUSE
SOIL STOCKPILE
TRUCK SCALE
SERVICE OFFICE
SANITARY LIFT STATION
OFFICE
TRAILER
2800 N. TRYON STREET -
QUEEN CITY METAL
RECYCLING & SALVAGE
2726 N. TRYON STREET -
VACANT SERVICE GARAGE
TRYON PLAZA
(2729 N. TRYON STREET)
ECONO AUTO PAINTING
(2710 N. TRYON STREET)
SAMS XPRESS MART
(2700 N. TRYON STREET)
VACANT - FORMER
TRUCKING FACILITY
(2600 N. TRYON STREET)
VACANT LAND
(255 MATHESON AVENUE)VACANT LAND
(2720 CHICK GODLEY ROAD)
125 MATHESON AVENUE -
LIGHTNING TRANSPORTATION
VACANT
(2813 N. TRYON STREET)ALLISON ERWIN
(2920 N. TRYON STREET)
UST BASIN
2832 N. TRYON STREET -
GRAND PRIX NORTH END
REMOVED USTs
LITT
L
E
S
U
G
A
R
C
R
E
E
K
N. TR
Y
O
N
S
T
R
E
E
T
MA
T
H
E
S
O
N

A
V
E
N
U
EW.
3
1
S
T

S
T
R
E
E
T
UNDER DEVELOPMENT
CMC LINEN SERVICES
DISTRIBUTION WAREHOUSE
(220-230 W. 32ND STREET)
NOTES:
1. AERIAL IMAGERY AND PARCEL DATA OBTAINED
FROM MECKLENBURG COUNTY GIS (2022).
2. AST = ABOVEGROUND STORAGE TANK
3. TEMPORARY MONITORING WELLS TMW-1 THROUGH
TMW-4 SAMPLES ON 4/1/2021.
4. SOIL BORINGS SB-1 THROUGH SB-9 SAMPLED ON
3/31/2021 AND 4/1/2021.
EXISTING UST BASIN
FORMER UST BASIN
PMW-12A12B
S:\AAA-Master Projects\Anthony Kuhn (Flywheel) - AMK\AMK-022 2726-2832 N Tryon and 125 Matheson Ave\Brownfields\Workplan\Figures\AMK-022_Site Map.dwg, FIG 2, 7/25/2022 6:47:57 PM,sperry
SB-6
SB-7
SB-5
SB-1
SB-2
SB-3
SB-4
TMW-1
TMW-2
TMW-3
SB-8
SB-9
TMW-4
SB-BG
SB-22
SSV-8
SSV-7
SSV-6
SSV-9
SSV-5
SSV-4
SSV-3
SSV-2
SSV-1
SB-16
SB-15
SB-20
SB-21
SB-19
SB-18
SB-14
SB-17
SB-10
SB-11
SB-12
SB-13
SG-2
SG-1
TMW-5
REVISION NO. 0
JOB NO. AMK-022
DATE: 7-25-22
FIGURE NO. 3
2726-2832 N. TRYON STREET AND
125 MATHESON AVENUE
CHARLOTTE, NORTH CAROLINA
BUILDABLE AREA AND PROPOSED
SAMPLE LOCATIONS MAP
LEGEND
TEMPORARY MONITORING WELL
LOCATION
EXISTING SOIL BORING LOCATION
APPROXIMATE EXISTING MONITORING
WELL LOCATION
PROPOSED SOIL BORING LOCATION
PROPOSED TEMPORARY MONITORING
WELL LOCATION
PROPOSED SUB-SLAB VAPOR SAMPLE
LOCATION
PROPOSED SOIL GAS SAMPLE
LOCATION
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
NOTES:
1. TEMPORARY MONITORING WELLS TMW-1 THROUGH
TMW-4 SAMPLES ON 4/1/2021.
2. SOIL BORINGS SB-1 THROUGH SB-9 SAMPLED ON
3/31/2021 AND 4/1/2021.S:\AAA-Master Projects\Anthony Kuhn (Flywheel) - AMK\AMK-022 2726-2832 N Tryon and 125 Matheson Ave\Brownfields\Workplan\Figures\AMK-022_Site Map.dwg, FIG 3, 7/25/2022 6:44:06 PM,sperryPMW-12A/12B

Appendix A
Redevelopment Renderings and Grading Plan
84,300 GSF
ADDED THIS PHASE
22,000 GSF
6,800 GSF
200,000 GSF
400 Units
74,000 GSF 200,000 GSF 400 Units 1,452 spaces
23,000 GSF 32,300 GSF 45,000 GSF 1,770 spaces
870 Spaces
32,300 GSF 100 Spaces
800 Spaces
74,000 GSF
Adaptive Re-Use Office
Adaptive Re-use Food Hall
Outparcel Retail
Parking Required: 33
Parking Required: 400
Parking Required: 400
Parallel Spaces : 60
Total Required: 691
Parking Required: 110
Parking Required: 148
Parking Deck
Retail Surface Parking
Parking Deck
A
FEB
C
D
Office
Residential
Road Consturction
45,000 GSF
Grocery Store
Parking Required: 200
Parking Required: 161
Parking below with sports turf on top.
03
Current Total Development
Adaptive Re-use Office Office Apartment Units Parking Required
Adaptive Re-use Retail Retail Grocery Store Parking Provided
Phase 1
A
B
C
D
F
E
ADDED THIS PHASE
74,000 GSF 200,000 GSF 400 Units 1,702 spaces
23,000 GSF 32,300 GSF 45,000 GSF 1,770 spaces250 Keys
Keys
250 Keys
Hotel
Parking Required: 250*
*Parking constructed in phase 1
I
03
Current Total Development
Adaptive Re-use Office Office Apartment Units Parking Required
Adaptive Re-use Retail Retail Grocery Store Parking Provided
Phase 2
G
ADDED THIS PHASE
74,000 GSF 200,000 GSF 780 Units 2,450 spaces
23,000 GSF 69,100 GSF 45,000 GSF 2,457 spaces
* Additional parking for Hotel plus shared parking with adjacent office.
250 Keys
Keys
380 Units
36,800 GSF
687 spaces
Residential
Retail
Parking Deck
Parking Required: 380
Parking Required: 184
Parking Required: 564
J
03
Current Total Development
Adaptive Re-use Office Office Apartment Units Parking Required
Adaptive Re-use Retail Retail Grocery Store Parking Provided
Phase 3
J
ADDED THIS PHASE
74,000 GSF 560,000 GSF 780 Units 3,194 spaces
23,000 GSF 73,900 GSF 45,000 GSF 3,207 spaces250 Keys
Keys
Adaptive Re-use Office Office Apartment Units Parking Required
Adaptive Re-use Retail Retail Grocery Store Parking Provided
750 Spaces
Parking Deck
Parking Required: 744*
360,000 GSF
4,800 GSF
Office
Retail
Parking Required: 720*
Parking Required: 24
03
K
Current Total Development
Phase 4
K
FUT-ROWFUT-ROWROW
ROW
ROW
ROW
ROW
ROW
ROW
ROW
ROWROWROWROWROWROWROWROWROW
EX-ROWEX-ROWEX-ROWFUT-ROW
FUT-ROW
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FUT-ROW
FUT-ROW
FUT-ROW FUT-ROW FUT-ROW
EX-ROWEX-ROWEX-ROWEX-ROWEX-ROW
EX-ROW
EX-ROW
EX-ROW
EX-ROW
EX-ROW
EX-ROW EX-ROW EX-ROW
EX-ROW
EX-ROW
EX-ROW
EX-ROW
ROW
ROW
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ROW
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Mecklenburg County
FEMA Floodway
FEMA Floodway
Community Encr
o
a
c
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m
e
n
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A
r
e
a R RR RBP Trail LLC
BP Trail LLC
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EX-ROW
EX-ROW
EX-ROW
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BSL
BSL
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BSL
BSL
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BSL BSLBSLBSLBSLBSLBSLBSLBSL
BSL BSLBSL BSLBSL
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BSL
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BSL
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BSL
BSL
BSL
BSLBSL
BSLBSLBSLBSLBSLBSLBSLBSLBSL
BSL
BSL
BSL
BSL
BSL
BSL
BSL
BSL
BSL
BSLBSLT
T
FFE 69
5
.
2
5
FFE 69
5
.
2
5OPPORTUNITY
LANE
CULLM
A
N

A
V
E
.
PARCEL A
NEW OFFICE - 200,000 SF
ADAPTIVE REUSE OFFICE - 83,300 SF
RETAIL - 35,100 SF
GRADING PLAN NOTES
PROPOSED STORM DRAINAGE PLAN LEGEND
D
PROPOSED TOPOGRAPHIC LEGEND
HP HP HP
LP LP LP
ME ME ME
P115-CB
VARIABLE HEIGHT SEGMENTED RETAINING WALL. (SEE WALL DETAILS)
ALL PAVEMENT SPOT GRADES ELEVATIONS ALONG CURB AND GUTTER REFER TO EDGE OF
PAVEMENT ELEVATIONS UNLESS OTHERWISE NOTED.
VARIABLE HEIGHT DECORATIVE RETAINING WALL. SEE HARDSCAPE/LANDSCAPE PLANS.
ALL SPOT GRADES DEPICT FINISH GRADE UNLESS OTHER WISE NOTED.
NO EARTHEN SLOPE SHALL BE GREATER THAN 3:1, UNLESS OTHERWISE NOTED.
MATCH EXISTING ELEVATIONS AT THE PROPERTY LIMITS. GRADING ON ADJACENT
PROPERTY SHALL REQUIRE SLOPE PERMISSION. CONTRACTOR SHALL NOT COMMENCE
WORK ON ADJACENT PROPERTY UNTIL SUCH AGREEMENT IS IN PLACE.
SITE ACCESSIBILITY ROUTE FROM STREET TO BUILDING SITE ARRIVAL POINT OR
EMERGENCY EGRESS.
GRADING PLAN NOTES
A MINIMUM VERTICAL SEPARATION OF 18-INCHES SHALL BE MAINTAINED AT CROSSINGS. IN
THE EVENT THAT MINIMUM SEPARATION REQUIREMENTS CANNOT BE MET, THE CONTRACTOR
SHALL UTILIZE MINIMUM PIPE SEPARATION REQUIREMENTS PER THE GOVERNING AGENCY.
LOW POINT (LP) DRAINAGE BREAK FLOW LINE IN PAVEMENT SECTION. POSITIVE GRADE DRAIN.
DECORATIVE TRENCH DRAIN SHALL BE INSTALLED WITH A MINIMUM 0.5% SLOPE - SEE DETAIL
CXXX.
OPEN CUT TRENCH. REMOVE EXISTING PAVEMENT, CURB, (SIDEWALK) TO FACILITATE UTILITY
INSTALLATION. SAWCUT A CLEAN EDGE ON BOTH SIDES OF TRENCH. THE CONTRACTOR WILL
BE RESPONSIBLE FOR RESTORATION OF THE EXISTING STREET PAVING AND ANY LAND COVER
OR STRUCTURE TO ITS ORIGINAL OR BETTER CONDITION.
SERVICE STUB WITH CAP & PLUG WITH SURFACE MARKER.
PERMANENT GRASS SWALE. SEE DETAIL FOR DIMENSION AND CAPACITY.
1
2
3
4
5
6
THIS DOCUMENT, TOGETHER WITH THE CONCEPTS AND DESIGNS PRESENTED HEREIN, AS AN INSTRUMENT OF SERVICE, IS INTENDED ONLY FOR THE SPECIFIC PURPOSE AND CLIENT FOR WHICH IT WAS PREPARED. REUSE OF AND IMPROPER RELIANCE ON THIS DOCUMENT WITHOUT WRITTEN AUTHORIZATION AND ADAPTATION BY KIMLEY-HORN AND ASSOCIATES, INC. SHALL BE WITHOUT LIABILITY TO KIMLEY-HORN AND ASSOCIATES, INC.
NC LICENSE #F-0102
200 SOUTH TRYON STREET, SUITE 200
CHARLOTTE, NORTH CAROLINA 28202
PHONE [phone]
C 2022FLYWHEEL - NORTH TRYON
SHEET 1 of 1
THIS PLAN IS CONCEPTUAL IN NATURE AND HAS BEEN PRODUCED WITHOUT THE BENEFIT OF A SURVEY, CODE RESEARCH, OR CONTACT WITH THE CITY, COUNTY, ETC.
N
O
R
T
H
GRADING & DRAINAGE PLAN
02/03/22

Appendix B
Previous Assessment Data Tables and Figures
Table 1 Summary of Soil Analytical DataParcel Assemblage2700-2832 N. Tryon St. and 125 Matheson Ave.Charlotte, North CarolinaH&H Job No. AMK-022Evaluation Area Service OfficeMetal Sorting AreaFill & Soil Pile AreaFill & Soil Pile AreaDrum Storage AreaOil Storage AreaVacant Service GarageUndisturbed SE portion of SiteSample IDSB-1 SB-2 SB-3 SB-4 SB-5 SB-6 SB-7 SB-8 SB-9 SB-BGDate4/1/2021 4/1/2021 4/1/2021 4/1/2021 4/1/2021 4/1/2021 4/1/2021 3/31/2021 3/31/2021 4/1/2021Depth (ft bgs)0.5-1.5 0.5-1.5 0.5-1.5 1-2 0.5-1.5 1-2 1-2 6-7 2-3 1-2Range MeanUnitsVOCs (8260D)Acetone 0.0270.0710.682 0.040 0.060<0.0190.020 J<0.018 <0.018 NA2512,000140,0002414,000360,000----1,2-Dichloroethane<0.0008 <0.0007 <0.018 <0.00070.0009 J<0.0008 <0.0008 <0.0007 <0.0008 NA0.00230.492.200.00197.063----1,3,5-Trimethylbenzene<0.0008 <0.00080.606<0.00080.002 J<0.008 <0.0008 <0.0008 <0.0008 NA11563208.378220,440----4-Isopropyl toluene<0.001 <0.0010.370<0.0010.002 J<0.001 <0.001 <0.001 <0.001 NANENENE0.1201004,000----4-Methyl-2-Pentanone<0.018 <0.0180.877<0.018 <0.017 <0.019 <0.019 <0.018 <0.018 NANE7,00030,000NENENE----Benzene<0.00100.001 J0.503<0.00090.004 J0.021<0.001 <0.00090.006NA0.0101.25.40.007218164----Bromomethane<0.003 <0.0020.4510.002 J<0.002 <0.003 <0.003 <0.002 <0.003 NA0.11.46.40.4022570----Carbon Disulfide<0.0010.002 J<0.0260.002 J 0.002 J<0.001 <0.001 <0.001 <0.001 NA4.11607404.31,56440,880----Di-Isopropyl Ether (DIPE)<0.0009 <0.0009 <0.022 <0.0009 <0.00090.003 J<0.0010 <0.0009 <0.0009 NA0.364802,000NENENE----Ethylbenzene<0.0009 <0.00095.130.001 J 0.011<0.0010 <0.0010 <0.0009 <0.0009 NA136.1274.901,56040,000----Isopropyl benzene<0.0007 <0.00070.606<0.00070.002 J<0.0008 <0.0008 <0.0007 <0.0007 NANENENE1.71,56440,880----m,p-Xylene<0.001 0.002 J20.30.005 J 0.047<0.001 <0.001 <0.001 <0.001 NA9.80120500NENENE----Methyl Ethyl Ketone (MEK)0.001 J 0.008 J<0.036 <0.001 <0.001 <0.0010.002 J 0.001 J<0.001 NA175,50040,000169,385245,280----Methyl tert-butyl ether (MTBE)<0.0009 <0.0009 <0.021 <0.0008 <0.00080.003 J<0.0009 <0.0008 <0.0009 NA0.090492000.0913503,100----Naphthalene<0.00060.001 J1.78<0.00060.018<0.0007 <0.0007 <0.0006 <0.0006 NANENENE0.163138,176----n-Butylbenzene<0.0006 <0.00060.296<0.00060.002 J<0.0006 <0.0006 <0.0006 <0.0006 NA578012,0004.362616,350----n-Hexane<0.00070.006 J 0.585 0.004 J 0.010 J<0.00080.001 J<0.0007 <0.0007 NA5513054055NENE----n-Propyl benzene<0.0009 <0.00091.60<0.00090.009<0.0010 <0.0009 <0.0009 <0.0009 NANENENE1.762616,350----o-Xylene<0.0007 <0.000717.40.003 J 0.027 0.0009 J<0.0007 <0.0006 <0.0007 NA9.8140590NENENE----sec-Butylbenzene<0.0007 <0.00070.200<0.00070.001 J<0.0007 <0.0007 <0.0007 <0.0007 NA4.101,60023,0003.3062616,350----Styrene<0.0006 <0.00060.184<0.0006 <0.0006 <0.0006 <0.0006 <0.0006 <0.0006 NA1.501,2007,3001.503,12881,760----Tetrachloroethylene0.0140.0060.096 J0.004 J0.245<0.001 <0.001 <0.001 <0.001 NA0.006317820.00741.110----Toluene<0.0010.002 J15.50.005 J 0.020 0.001 J<0.001 <0.0010 <0.001 NA8.309909,7004.301,20032,000----Trichlorofluoromethane<0.001 <0.0012.00<0.001 <0.001 <0.001 <0.001 <0.001 <0.001 NA254,70070,000294,692122,640----Xylene (Total)<0.00070.002 J37.60.009 J 0.074 0.0009 J<0.0007 <0.0006 <0.0007 NA9.91205304.63,12981,760------PAHs (8270E)Acenaphthene <0.018 <0.037 <0.034 <0.0360.124 J<0.019 <0.019 <0.018 <0.019 NA16 720 9,000 8.2 940 24,000 -- --Anthracene<0.009 <0.018 <0.0160.093 J 0.165 J<0.009 <0.009 <0.008 <0.009 NA1300 3,600 45,000 940 4,600 122,000 -- --Benzo(a)anthracene<0.009 <0.019 <0.0180.317 J0.493 J<0.010 <0.010 <0.009 <0.010 NA0.35 1.1 21 0.35 0.88 8 -- --Benzo(a)pyrene0.034 J<0.014 <0.0130.412J 0.463 J<0.007 <0.007 <0.007 <0.007 NA0.12 0.11 2.1 0.096 0.088 0.78 -- --Benzo(b)fluoranthene0.041 J<0.015 <0.0140.604 J 0.592 J<0.008 <0.007 <0.007 <0.007 NA1.2 1.1 21 1.2 0.88 8 -- --Benzo(g,h,i)perylene<0.008 <0.016 <0.0150.310 J 0.264 J<0.008 <0.008 <0.007 <0.008 NANE NE NE 6,400 469 12,264 -- --Benzo(k)fluoranthene<0.008 <0.017 <0.0160.158 J 0.235 J<0.009 <0.009 <0.008 <0.008 NA12 11 210 12 9.0 78 -- --Chrysene<0.009 <0.019 <0.0180.464 J 0.539 J<0.010 <0.010 <0.009 <0.009 NA36 110 2,100 39 88 780 -- --Fluoranthene<0.009 <0.018 <0.0170.524 J 0.989 J<0.009 <0.009 <0.009 <0.009 NA670 480 6,000 290 620 16,400 -- --Fluorene<0.018 <0.035 <0.033 <0.0350.185 J<0.019 <0.018 <0.017 <0.018 NA110 480 6,000 47 620 16,400 -- --1-Methylnaphthalene<0.012 <0.0250.612 J 0.070 J 0.778 J 0.047 J<0.013 <0.012 <0.012 NA0.11 18 73 0.004 20 100 -- --2-Methylnaphthalene<0.0160.127 J 1.26 J 0.104 J 0.934 J 0.088 J<0.016 <0.015 <0.016 NA3.1 48 600 3.6 63 1,635 -- --Naphthalene<0.0170.102 J1.670.067 J1.14 J<0.018 <0018 <0.016 <0.017 NA0.39 2.1 8.8 0.16 313 8,176 -- --Phenanthrene<0.009 <0.017 <0.0160.256 J 0.801 J<0.009 <0.009 <0.008 <0.009 NANE NE NE 56 469 12,264 -- --Pyrene<0.0120.542 J<0.0220.715 J 1.00 J<0.012 <0.012 <0.011 <0.012 NA4403604,50044046912,264----RCRA Metals (6020/7471/7196A)Chromium VI0.8981.020.447 J 0.575 0.287 J 0.744NANANA0.6703.8 0.31 6.5 5.4 47 1,226 7.0-300 65Arsenic4.14 5.02 7.58 9.52 11.2 5.09NA NA NA3.365.8 0.68 3.0 NE NE NE 1.0-18 4.8Barium66.4 240627364 172 53.8NA NA NA77.5580 3,100 47,000 290 3,100 81,000 50-1,000 356Cadmium0.108 J 1.783.22 4.021.08 0.0601 JNA NA NA0.0758 J3.0 14 200 NE NE NE 1.0-10 4.3Chromium III73.3 133 1110 1610 307 41.3NA NA NA52.7NE NE NE NE NE NE NE NELead57.04271,31038829935.4NANA NA19.0270400800270400400ND-50 16Mercury0.0485 J 0.2390.287 0.376 0.0693 0.212NANA NA0.07281.02.39.7NENENE 0.03-0.52 0.121Selenium1.98 B 0.404 JB 0.651 JB 1.08 JB 1.29 B1.38 BNANA NA1.28 B2.1781,200NENENE<0.1-0.8 0.42Silver<0.06372.3245.41.621.68<0.0674 NANA NA0.287 J3.4781,2000.2578.22,044 ND-5.0 NENotes:1) North Carolina Department of Environmental Quality (DEQ) Inactive Hazardous Sites Branch (IHSB) Preliminary Soil Remediation Goals (PSRGs) dated January 2021.2) NC DEQ Division of Waste Management (DWM) Underground Storage Tank (UST) Section Action Levels dated July 2016.Soil concentrations are reported in milligrams per kilogram (mg/kg).Compound concentrations are reported to the laboratory method detection limits.Laboratory analytical methods are shown in parentheses.Only constituents detected in at least one sample are shown in the table above.Bold values exceed the Protection of Groundwater PSRG and/or the Soil-to-Water MSCCBold and Italicized values exceed the Residential PSRG and/or the Residential MSCCBold and Underlined values exceed the Industrial/Commercial PSRG and/or Industrial/Commercial MSCC VOCs = volatile organic compounds; PAHs = polycyclic aromatic hydrocarbonsNA = not analyzed; NE = not established; -- = not applicableDEQ Brownfields Screening Levels1Industrial/ Commercial PSRGs (1)Residential PSRGs (1)mg/kgSoil-to-Water MSCCsResidential Soil Cleanup LevelsIndustrial/ Commercial Soil Cleanup LevelsSam's Xpress Mart Gas StationDEQ UST Section Screening Levels2Regional Background Metals in Soil3Protection of Groundwater PSRGsM:\AAA‐Master Projects\Anthony Kuhn (Flywheel) ‐ AMK\AMK‐022 2726‐2832 N Tryon and 125 Matheson Ave\Phase II ESA\Report\Tables\Data TablesTable 1 (Page 1 of 3)Hart & Hickman, PC
Table 2Summary of Well Construction DataParcel Assemblage2700-2832 N. Tryon St. and Matheson Ave.Charlotte, North CarolinaH&H Job No. AMK-022Well IDTotal Depth (ft bgs)Screen Length (ft)Screen Interval (ft bgs)Depth to Groundwater (ft bgs)TMW-1 15 10 5-15 11.31TMW-2 22 10 12-22 13.75TMW-3 20 10 10-20 10.52TMW-4 16 10 6-16 7.92 Notes:Depth to groundwater measurements collected by H&H on April 1, 2021. TMW = temporary monitoring well; ft bgs = feet below ground surfaceM:\AAA-Master Projects\Anthony Kuhn (Flywheel) - AMK\AMK-022 2726-2832 N Tryon and 125 Matheson Ave\Phase II ESA\Report\Tables\Data Tables5/5/2021Table 2 (Page 2 of 3)Hart & Hickman, PC
Table 3 Summary of Groundwater Analytical DataParcel Assemblage2700-2832 N. Tryon St. and 125 Matheson Ave.Charlotte, North CarolinaH&H Job No. AMK-022Evaluation Area Downgradient of operationsDowngradient of service garageSample IDTMW-1 TMW-2 TMW-3 TMW-4Date4/1/2021 4/1/2021 4/1/2021 4/1/2021UnitsVOCs (8260D)Acetone<0.3102.09 JB 1.29 JB 2.68 JB6,000 4,500,00019,000,000PAHs (8270E)ALL BDL ALL BDL ALL BDL ALL BDL-- -- --RCRA Metals (6020/7470)Arsenic39.0NA NA NA10 -- --Barium 126.0NA NA NA700 -- --Cadmium<0.160 NA NA NA2----Chromium<0.790 NA NA NA10 -- --Lead 0.292 JNA NA NA15 -- --Mercury<0.00003 NA NA NA1 0.18 0.75Selenium<0.740 NA NA NA20 -- --Silver<0.110 NANANA20 -- --1) North Carolina Department of Environmental Quality (DEQ) 15A NCAC 02L.0202 Groundwater Standards (2L Standards) dated April 20132) NC DEQ Division of Waste Management (DWM) Vapor Intrusion Groundwater Screening Levels (GWSLs) dated January 2021Concentrations are reported in micrograms per liter (µg/L).Compound concentrations are reported to the laboratory method detection limits.Laboratory analytical methods are shown in parentheses.Only constituents detected in at least one sample are shown in the table above.Bold values exceed the 2L Standard.Bold and Underlined values exceed the DWM Residential GWSLs. Shaded values exceed the DWM Non-Residential GWSLs. VOCs = volatile organic compounds; PAHs = polycyclic aromatic hydrocarbons NE = not established; NA = not analyzed; -- = not applicable; BDL = below laboratory method detection limit Screening Criteria µg/L2L Standards (1) Residential GWSLs (2)Non-Residential GWSLs (2)Downgradient of gas station M:\AAA‐Master Projects\Anthony Kuhn (Flywheel) ‐ AMK\AMK‐022 2726‐2832 N Tryon and 125 Matheson Ave\Phase II ESA\Report\Tables\Data Tables5/5/2021Table 3 (Page 1 of 1) Hart & Hickman, PC
SB-6
SB-7
SB-5
SB-1
SB-2
SB-3
SB-4
TMW-1
TMW-2
TMW-3
SB-8
SB-9
TMW-4
SB-BG
REVISION NO. 0
JOB NO. AMK-022
DATE: 4-7-21
FIGURE NO. 2
2726-2832 N. TRYON STREET AND
125 MATHESON AVENUE
CHARLOTTE, NORTH CAROLINA
SITE AND SAMPLE LOCATION MAP
LEGEND
SITE PROPERTY BOUNDARY
PARCEL BOUNDARY
SURFACE WATER FEATURE
O2 AST
TEMPORARY MONITORING WELL
LOCATION
SOIL BORING LOCATION
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
PETROLEUM STORAGE
FORMER OFFICE /
WAREHOUSE
SOIL STOCKPILE
TRUCK SCALE
SERVICE OFFICE
SANITARY LIFT STATION
OFFICE
TRAILER
2800 N. TRYON STREET -
QUEEN CITY METAL
RECYCLING & SALVAGE
2726 N. TRYON STREET -
VACANT SERVICE GARAGE
TRYON PLAZA
(2729 N. TRYON STREET)
ECONO AUTO PAINTING
(2710 N. TRYON STREET)
SAMS XPRESS MART
(2700 N. TRYON STREET)
VACANT - FORMER
TRUCKING FACILITY
(2600 N. TRYON STREET)
VACANT LAND
(255 MATHESON AVENUE)VACANT LAND
(2720 CHICK GODLEY ROAD)
125 MATHESON AVENUE -
LIGHTNING TRANSPORTATION
VACANT
(2813 N. TRYON STREET)
ALLISON ERWIN
(2920 N. TRYON STREET)UST BASIN
2832 N. TRYON STREET -
GRAND PRIX NORTH END
REMOVED USTs
LITT
L
E
S
U
G
A
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C
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K
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S
T
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E
E
T
VACANT LAND
UNDER DEVELOPMENT
CMC LINEN SERVICES
DISTRIBUTION WAREHOUSE
(220-230 W. 32ND STREET)
NOTES:
1.AERIAL IMAGERY OBTAINED FROM MECKLENBURG
COUNTY GIS (2020).
2.AST = ABOVEGROUND STORAGE TANK
3.TEMPORARY MONITORING WELLS TMW-1 THROUGH
TMW-4 SAMPLES ON 4/1/2021.
4.SOIL BORINGS SB-1 THROUGH SB-9 SAMPLED ON
3/31 AND 4/1/2021.
EXISTING UST BASIN
FORMER UST BASIN
\\hhfs01\MasterFiles\AAA-Master Projects\Anthony Kuhn (Flywheel) - AMK\AMK-022 2726-2832 N Tryon and 125 Matheson Ave\Phase II ESA\Figures\Site Map.dwg, FIG 2 ALT, 4/8/2021 5:43:35 PM, SVincent
Table 3a - Groundwater Analytical Results
3114 Cullman Ave, Charlotte, NC 28206
EPA # NCD 049 773-245
MW designation
Depth (feet)
Location
Lab ID
Date
Analyzed Compounds
Ethene NSL 54 1
Iron NSL 22,200 26
Acetone 6,000 1,340 79
Benzene 1 21 2
Bromobenzene 62 non detect non detect
Bromochloromethane NSL non detect non detect
Bromodichloromethane 0.6 5 1
Bromoform 4 8 3
Bromomethane 7.5 non detect non detect
2-Butanone (MEK)4,000 non detect non detect
Carbon tetrachloride 0.3 21 17
Chlorobenzene 50 32 1
Chloroethane 3,000 non detect non detect
Chloroform 70 62 1.2
Chloromethane 3 634 0.6
2-Chlorotoluene 100 non detect non detect
4-Chlorotoluene 250 non detect non detect
1,2-Dibromo-3-chloropropane 0.04 non detect non detect
Dibromochloromethane 0.4 8 3
1,2-Dibromoethane (EDB)0.02 non detect non detect
Dibromomethane 8 non detect non detect
1,2-Dichlorobenzene 20 3 3
1,3-Dichlorobenzene 200 8 1
1,4-Dichlorobenzene 6 25 7
Dichlorodifluoromethane 1,000 non detect non detect
1,1-Dichloroethane 6 132 2
1,2-Dichloroethane 0.4 23 1
1,1-Dichloroethene 350 6,440 2
cis-1,2-Dichloroethene 70 17,100 0.8
trans-1,2-Dichloroethene 100 419 1
1,2-Dichloropropane 0.6 63 57
1,3-Dichloropropane 0.4 non detect non detect
2,2-Dichloropropane NSL non detect non detect
1,1-Dichloropropene NSL 8 8
cis-1,3-Dichloropropene 0.4 non detect non detect
trans-1,3-Dichloropropene 0.4 non detect non detect
Diisopropyl ether 1,500 non detect non detect
Ethylbenzene 600 2 2
Hexachloro-1,3-butadiene 0.4 non detect non detect
2-Hexanone 38 non detect non detect
p-Isopropyltoluene NSL non detect non detect
Methylene Chloride 5 6,220 11
4-Methyl-2-pentanone (MIBK)1200 non detect non detect
Methyl-tert-butyl ether 20 2 1
Naphthalene 6 3 2
Styrene 70 non detect non detect
1,1,1,2-Tetrachloroethane 0.57 22 5
1,1,2,2-Tetrachloroethane 0.2 79 6
Tetrachloroethene 0.7 50,500 3
Toluene 600 121 1
1,2,3-Trichlorobenzene 7 non detect non detect
1,2,4-Trichlorobenzene 1.1 57 1
1,1,1-Trichloroethane 200 6,280 3
1,1,2-Trichloroethane 0.28 144 1
Trichloroethene 3 422,000 0
Trichlorofluoromethane 2,000 546 180
1,2,3-Trichloropropane 0.005 non detect non detect
Vinyl acetate 410 non detect non detect
Vinyl chloride 0.03 226 4
Xylene (total)NSL 53 53
m&p-Xylene 500 29 4
o-Xylene 500 23 3
Chloride NSL 69,500 1600
Sulfate NSL 1,380,000 1200
Total Organic Carbon NSL 28,900 200
1,4-Dioxane 3 3 3
Arsenic 10 non detect non detect
Barium 700 13.8 13.8
Cadmium 2 1.6 1.6
Chromium 10 7.7 7.7
Lead 15 5 5
Mercury 1 non detect non detect
Selenium 20 27.8 27.8
Silver 20 7.8 7.8
Max
detected
value
(μg/l)
2L Standard
or EPA TAP
SL
(μg/l)
Min
detected
value
(μg/l)
PMW-11B PMW-11B PMW-12A PMW-12A PMW-12A PMW-12B PMW-12B PMW-13B PMW-13B
78 78 40 40 40 49 49 103 103
Offsite NORTH Offsite NORTH Offsite
NORTHWEST
Offsite
NORTHWEST
Offsite
NORTHWEST
Offsite
NORTHWEST
Offsite
NORTHWEST Offsite NORTH Offsite NORTH
92409026019 92268845003 92409026023 92268845004 92409026020
9/26/2012 11/26/2018 9/28/2012 9/22/2015 11/29/2018 9/28/2012 9/22/2015 9/25/2012 11/27/2018
Pre-Injection Pre-Injection Pre-Injection
<10 NA NA <10.0 10.0 U 3.4 J NA NA NA NA NA NA NA NA <10.0
227 NA NA 577 4200 490 NA NA NA NA NA NA NA NA 1620
<100 <1250 <100 <125 <125 <125 <25.0 <100 <10.0 <25.0 <100 <10.0 <25.0 <1000 <100
<4.0 <50.0 <1.0 <3.1 <5.0 <5.0 <1.0 <1.0 <0.25 <1.0 <1.0 <0.25 16.7 <10.0 <2.5
<4.0 <50.0 <1.0 <3.8 <5.0 <5.0 <1.0 <1.0 <0.30 <1.0 <1.0 <0.30 <1.0 <10.0 <3.0
<4.0 <50.0 <3.0 <2.1 <5.0 <5.0 <1.0 <3.0 <0.17 <1.0 <3.0 <0.17 <2.0 <30.0 <1.7
<4.0 <50.0 <1.0 <2.2 <5.0 <5.0 <1.0 <1.0 <0.18 <1.0 <1.0 <0.18 3.7 <10.0 <1.8
<4.0 <50.0 <3.0 <3.2 <5.0 <5.0 <1.0 <3.0 <0.26 <1.0 <3.0 <0.26 <1.0 <30.0 <2.6
<8.0 <100 <10.0 L2 <3.6 <10.0 <10.0 <2.0 <10.0 <0.29 <2.0 <10.0 <0.29 <1.0 <100 <2.9
<20.0 <250 <100 <12.0 <25.0 <25.0 <5.0 <100 <0.96 <5.0 <100 <0.96 <5.0 <1000 <9.6
<4.0 <50.0 <1.0 <3.1 <5.0 <5.0 <1.0 <1.0 <0.25 <1.0 <1.0 <0.25 <1.0 <10.0 <2.5
<4.0 <50.0 <3.0 <2.9 <5.0 <5.0 <1.0 <3.0 <0.23 <1.0 <3.0 <0.23 <1.0 <30.0 <2.3
<4.0 <50.0 <10.0 <6.8 <5.0 <5.0 <1.0 <10.0 <0.54 <1.0 <10.0 <0.54 <1.0 <100 <5.4
<20.0 <50.0 <5.0 <1.8 <25.0 <25.0 <1.0 <5.0 <0.14 <1.0 <5.0 <0.14 3.6 <50.0 <1.4
<4.0 <50.0 <1.0 L2 <1.4 <5.0 <5.0 <1.0 <1.0 <0.11 <1.0 <1.0 <0.11 <1.0 <10.0 <1.1
<4.0 <50.0 <1.0 <4.4 <5.0 <5.0 <1.0 <1.0 <0.35 <1.0 <1.0 <0.35 <1.0 <10.0 <3.5
<4.0 <50.0 <1.0 <3.9 <5.0 <5.0 <1.0 <1.0 <0.31 <1.0 <1.0 <0.31 <1.0 <10.0 <3.1
<20.0 <250 <13.0 <25.0 <10.0 <25.0 <5.0 <13.0 <2.0 <5.0 <13.0 <2.0 <5.0 <130 <20.0
<4.0 <50.0 <3.0 <2.6 <5.0 <5.0 <1.0 <3.0 <0.21 <1.0 <3.0 <0.21 <1.0 <30.0 <2.1
<4.0 <50.0 <1.0 <3.4 <5.0 <5.0 <1.0 <1.0 <0.27 <1.0 <1.0 <0.27 <1.0 <10.0 <2.7
<4.0 <50.0 <10.0 <2.6 <5.0 <5.0 <1.0 <10.0 <0.21 <1.0 <10.0 <0.21 <1.0 <100 <2.1
<4.0 <50.0 <5.0 <3.8 <5.0 <5.0 <1.0 <5.0 <0.30 <1.0 <5.0 <0.30 <1.0 <50.0 <3.0
<4.0 <50.0 <1.0 <3.0 <5.0 <5.0 <1.0 <1.0 <0.24 <1.0 <1.0 <0.24 <1.0 <10.0 <2.4
<4.0 <50.0 <1.0 <4.1 <5.0 <5.0 <1.0 <1.0 <0.33 <1.0 <1.0 <0.33 <1.0 <10.0 <3.3
<4.0 <50.0 <1.0 <2.6 <5.0 <5.0 <1.0 <1.0 <0.21 <1.0 <1.0 <0.21 <1.0 <10.0 <2.1
7.1 <50.0 7.8 <4.0 <5.0 2.7 J 2.1 <5.0 <0.32 2.6 <5.0 <0.32 123.0 <50.0 <3.2
1.9 J <50.0 2.6 <3.0 <5.0 <5.0 <1.0 <1.0 <0.24 <1.0 <1.0 <0.24 5.4 <10.0 <2.4
<4.0 261.0 53.0 22.2 5.0 13.7 <1.0 <5.0 <0.56 <1.0 <5.0 <0.56 1510 65.6 27.5
35.5 J 449.0 163.0 70.3 19.9 41.6 <1.0 <5.0 <0.19 <1.0 <5.0 <0.19 1410 92.3 67.9
3.7 J <50.0 <5.0 <6.1 <5.0 <5.0 <1.0 <5.0 <0.49 <1.0 <5.0 <0.49 15.8 <50.0 <4.9
<4.0 <50.0 <1.0 <3.4 <5.0 <5.0 <1.0 <1.0 <0.27 <1.0 <1.0 <0.27 <1.0 <10.0 <2.7
<4.0 <50.0 <1.0 <3.5 <5.0 <5.0 <1.0 <1.0 <0.28 <1.0 <1.0 <0.28 <1.0 <10.0 <2.8
<4.0 <50.0 <1.0 <1.6 <5.0 <5.0 <1.0 <1.0 <0.13 <1.0 <1.0 <0.13 <1.0 <10.0 <1.3
<4.0 <50.0 <1.0 <6.1 <5.0 <5.0 <1.0 <1.0 <0.49 <1.0 <1.0 <0.49 <1.0 <10.0 <4.9
<4.0 <50.0 <1.0 <1.6 <5.0 <5.0 <1.0 <1.0 <0.13 <1.0 <1.0 <0.13 <1.0 <10.0 <1.3
<4.0 <50.0 <1.0 <3.2 <5.0 <5.0 <1.0 <1.0 <0.26 <1.0 <1.0 <0.26 <1.0 <10.0 <2.6
<4.0 <50.0 <1.0 <1.5 <5.0 <5.0 <1.0 <1.0 <0.12 <1.0 <1.0 <0.12 <1.0 <10.0 <1.2
<4.0 <50.0 <1.0 <3.8 <5.0 <5.0 <1.0 <1.0 <0.30 <1.0 <1.0 <0.30 <1.0 <10.0 <3.0
<4.0 <50.0 <1.0 <8.9 <5.0 <5.0 <1.0 <1.0 <0.71 <1.0 <1.0 <0.71 <1.0 <10.0 <7.1
<20.0 <250 <50.0 <5.8 <25.0 <25.0 <5.0 <50.0 <0.46 <5.0 <50.0 <0.46 <5.0 <500 <4.6
<4.0 <50.0 <1.0 <3.9 <5.0 <5.0 <1.0 <1.0 <0.31 <1.0 <1.0 <0.31 <1.0 <10.0 <3.1
<20.0 <100 <2.0 <12.1 <25.0 <25.0 <2.0 <2.0 <0.97 <2.0 <2.0 <0.97 <2.0 <20.0 C9 <9.7
<20.0 <250 <100 <4.1 <25.0 <25.0 <5.0 <100 <0.33 <5.0 <100 <0.33 <5.0 <1000 <3.3
<4.0 <50.0 <1.0 <2.6 <5.0 <5.0 1.6 1.1 0.7 1.7 1.0 0.7 J <1.0 <10.0 <2.1
<4.0 <50.0 <1.0 <3.0 <5.0 <5.0 <1.0 <1.0 <0.24 <1.0 <1.0 <0.24 1.8 <10.0 <2.4
<4.0 <50.0 <1.0 <3.2 <5.0 <5.0 <1.0 <1.0 <0.26 <1.0 <1.0 <0.26 <1.0 <10.0 <2.6
<4.0 <50.0 <5.0 <4.1 <5.0 <5.0 <1.0 <5.0 <0.33 <1.0 <5.0 <0.33 5.2 <50.0 <3.3
<4.0 <50.0 <3.0 <5.0 <5.0 <5.0 <1.0 <3.0 <0.40 <1.0 <3.0 <0.40 <1.0 <30.0 <4.0
200.0 2160 474 202 25.8 71 <1.0 <1.0 <0.46 <1.0 <1.0 <0.46 21000 598 434
<4.0 <50.0 <1.0 <3.2 <5.0 <5.0 <1.0 <1.0 <0.26 <1.0 <1.0 <0.26 16.9 <10.0 <2.6
<4.0 <50.0 <1.0 <4.1 <5.0 <5.0 <1.0 <1.0 <0.33 <1.0 <1.0 <0.33 <1.0 <10.0 <3.3
<4.0 <50.0 <1.0 <4.4 <5.0 <5.0 <1.0 <1.0 <0.35 <1.0 <1.0 <0.35 <1.0 <10.0 <3.5
<4.0 107 20 <6.0 <5.0 <5.0 <1.0 <1.0 <0.48 <1.0 <1.0 <0.48 974.0 16.4 <4.8
<4.0 <50.0 3 <3.6 <5.0 <5.0 <1.0 <1.0 <0.29 <1.0 <1.0 <0.29 144.0 <10.0 <2.9
660 16700 4130 1910 580 983 <1.0 <1.0 <0.47 1.9 <1.0 <0.47 57500 2930 1440
<4.0 <50.0 <1.0 <2.5 <5.0 <5.0 <1.0 <1.0 <0.20 <1.0 <1.0 <0.20 <1.0 <10.0 <2.0
<4.0 <50.0 <1.0 <5.1 <5.0 <5.0 <1.0 <1.0 <0.41 <1.0 <1.0 <0.41 <1.0 <10.0 <4.1
<8.0 <100 <50.0 <4.4 <10.0 <10.0 <2.0 <50.0 <0.35 <2.0 <50.0 <0.35 <2.0 <500 <3.5
<4.0 <50.0 <1.0 <7.8 <5.0 <5.0 <1.0 <1.0 <0.62 <1.0 <1.0 <0.62 3.7 <10.0 <6.2
<4.0 NA <5.0 <12.5 <5.0 <5.0 NA <5.0 <1.0 NA <5.0 <1.0 NA <50.0 <10.0
<8.0 <100 <2.0 <8.2 <10.0 <10.0 <2.0 <2.0 <0.66 <2.0 <2.0 <0.66 <2.0 <20.0 <6.6
<4.0 <50.0 <1.0 <2.9 <5.0 <5.0 <1.0 <1.0 <0.23 <1.0 <1.0 <0.23 7.3 <10.0 <2.3
7700 NA NA 7100 4400 4700 NA NA NA NA NA NA NA NA 3600
57700 NA NA 19300 11900 12800 NA NA NA NA NA NA NA NA 9100
820 J NA NA <500 5600 1600 NA NA NA NA NA NA NA NA 1000
NA 18.0 20.3 NA NA NA 12.0 4.8 NA 9.5 4.8 NA 18.0 18.3 NA
NA <5.0 NA NA NA NA <5.0 NA NA <5.0 NA NA <5.0 <5.0 NA
NA 74.8 NA NA NA NA 78.3 NA NA 26.0 NA NA 121.0 101.0 NA
NA <1.0 NA NA NA NA <1.0 NA NA <1.0 NA NA <1.0 <1.0 NA
NA <5.0 NA NA NA NA <5.0 NA NA 14.6 NA NA 9.9 16.0 NA
NA <5.0 NA NA NA NA <5.0 NA NA <5.0 NA NA <5.0 <5.0 NA
NA <0.20 NA NA NA NA <0.20 NA NA <0.20 NA NA <0.20 <0.20 NA
NA <10.0 NA NA NA NA <10.0 NA NA <10.0 NA NA <10.0 <10.0 NA
NA <5.0 NA NA NA NA <5.0 NA NA <5.0 NA NA <5.0 <5.0 NA
63
Offsite NORTH
92438460018
7/23/2019
6-M post inject
PMW-11B
78
Offsite NORTH
92438460019
7/23/2019
6-M post inject
92409026024 922693800229226884500692418554007
9/22/2015 2/20/2019 11/29/2018 9/22/2015
1-M post inject Pre-Injection
PMW-11BPMW-11B PMW-12B PMW-13BPMW-11A
Offsite NORTHWEST
49
Offsite NORTH
103
Offsite NORTH
78
Offsite NORTH
78

October 27, 2022
Sent Via E-mail Steve Libbey, PG Hart & Hickman, PC 2923 S Tryon Street, Suite 100
Charlotte, NC 28203 [e-mail] Subject: Brownfields Assessment Work Plan Approval Tryon Assemblage Brownfields Property
Charlotte, Mecklenburg County Brownfields Project No 25034-21-060 Dear Mr. Libbey:
The North Carolina Department of Environmental Quality (DEQ) Brownfields Program reviewed the Brownfields Assessment Work Plan Revision 2 dated July 29, 2022 (Work Plan) received on October 10, 2022 via email. DEQ Brownfields comments to previous version dated June 30, 2022, of this Work Plan have been addressed; therefore, the Work Plan is approved.
Please be advised that this approval from DEQ Brownfields does not waive any applicable requirement to obtain any necessary permits, licenses or certifications which may be required from other state or local entities. If you have any questions, please feel free to contact me at 704-661-0330, or via e-mail at [e-mail]
Sincerely, Carolyn Minnich
Brownfields Project Manager ec: Jackson Goyette [e-mail] Matt Ingalls [e-mail]