20026 Kaiser WP BF Assessment & Approval 20181003

October 3, 2018

Sent Via E-Mail
Matt Ingalls Hart & Hickman 2923 S Tryon St, Suite 100
Charlotte, North Carolina 28203
[e-mail]

Subject: Brownfields Additional Assessment Work Plan Approval Kaiser Fluid Tech II Brownfields Property
Charlotte, Mecklenburg County
Brownfields Project No. 20026-16-060
Dear Mr. Ingalls,
The Department of Environmental Quality (DEQ) Brownfields Program received the
Brownfields Additional Assessment Work Plan dated October 3, 2018 for the above
referenced property. DEQ Brownfields reviewed this document and determined that comments
made by DEQ Brownfields to the previous versions of this work plan (dated September 27, 2018) have been incorporated as requested. Therefore, DEQ Brownfields approves the Work Plan dated
October 3, 2018.

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 questions about this correspondence or require additional
information, please feel free to contact me by phone at 704/661-0330 or by email at
[e-mail]

Sincerely, Carolyn Minnich
Carolyn Mininch
Brownfields Project Manager
ec: Tony Kuhn [e-mail]
Brett Lawrence [e-mail]

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Brownfields Additional Assessment Work Plan Kaiser Fluids Tech II
530 & 600 E. Sugar Creek Road
Charlotte, North Carolina
Brownfields Project ID: 20026-16-060 H&H Job No. AMK-011
Table of Contents

Section Page No.
1.0 Introduction ............................................................................................................................ 1
2.0 Background Information....................................................................................................... 3
3.0 Brownfields Additional Assessment Scope of Work ......................................................... 11
3.1 Utility Clearance ................................................................................................................. 11
3.2 Groundwater Assessment ................................................................................................... 11
3.3 Vapor Intrusion Assessment ............................................................................................... 14
3.4 Soil Assessment .................................................................................................................. 16
3.5 Receptor Survey ................................................................................................................. 17
3.6 Quality Assurance/Quality Control .................................................................................... 18
3.7 Boring Abandonment and Investigation Derived Waste .................................................... 18
4.0 Reporting .............................................................................................................................. 19

List of Figures
Figure 1 Site Location Map
Figure 2 Sample Location Map (Former Kaiser Fluid Technologies)
Figure 3 Sample Location Map (Former Henkel Chemical Corporation)

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Brownfields Additional Assessment Work Plan Kaiser Fluids Tech II
530 & 600 E. Sugar Creek Road
Charlotte, North Carolina
Brownfields Project ID: 20026-16-060 H&H Job No. AMK-011

1.0 Introduction

On behalf of Sugar Creek One, LLC and Sugar Creek Station, LLC c/o Flywheel Group, LLC,
Hart & Hickman, PC (H&H) has prepared this work plan to conduct Brownfields additional
assessment activities at the former Kaiser Fluids Tech II (Kaiser) and former Henkel Chemical
Corporation (Henkel) Brownfields property located at 530 and 600 E. Sugar Creek Road in
Charlotte, Mecklenburg County, North Carolina (Site or subject Site). A Site location map is
provided as Figure 1.

The Site is comprised of two parcels of land totaling approximately 8.15 acres. The Kaiser and
the Henkel properties are located on the north and south sides of Raleigh Street, respectively, and
near the Charlotte Area Transit System (CATS) LYNX Sugar Creek Road light rail station.
Kaiser (and Ronson Hydraulics) previously manufactured hydraulic fluid control systems for the
aerospace industry at the 530 E. Sugar Creek Road property from 1956 until 2003. The Kaiser
building was razed in November and December 2017, while the concrete building slab remains
in-place. The Kaiser portion of the Site is currently vacant and is periodically used for truck and
trailer parking.

Henkel previously manufactured, stored, and distributed textile chemicals at the 600 E. Sugar
Creek Road property from 1953 until the early 1990s. The Charlotte Art League currently
occupies portions of the Henkel building including Warehouse #3 and the attached office
building. Currently, Warehouse #1 and Warehouse #2 are predominantly vacant with portions of
Warehouse #1 used for equipment storage associated with the outdoor temporary pop-up concert
amphitheater located in the southeastern portion of the Site near the LYNX light rail.

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The Site received a letter of eligibility for entry into the North Carolina Department of
Environmental Quality (DEQ) Brownfields Program on June 28, 2017 (Brownfields Project No.
20026-16-060). Preliminary Site redevelopment plans indicate that the Site will be a mixed-use
transit-oriented development and the existing Henkel Site building will be renovated to include
multi-tenant commercial and retail businesses. On November 30, 2017, a kick-off meeting was
held with the DEQ Brownfields project manager, Ms. Carolyn Minnich, at H&H’s office in
Charlotte, NC to discuss historical uses at the Site, previous assessment activities, and data gaps
associated with current conditions at the Site in preparation for the commercial occupancy and
redevelopment.

In order to ensure the Henkel building is safe for commercial occupancy and prior to the
Charlotte Art League occupying the Site, H&H conducted initial Brownfields assessment
activities in January 2018 to address data gaps identified during the November 2017 kick-off
meeting associated with the Henkel Building. The January 2018 Brownfields assessment
activities included the collection of sub-slab vapor and building material samples from the
Henkel building. The results of the January 2018 sampling event were provided to DEQ in a
Brownfields Assessment Data Summary dated February 16, 2018 and will be summarized under
separate cover following the completion of the additional assessment activities.

This work plan describes proposed assessment activities to address the remaining data gaps
identified during the November 2017 kick-off meeting. The proposed scope of work for
additional assessment is presented in Section 3.0.

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2.0 Background Information

Previous environmental assessment activities have been conducted at the Site by H&H and
others between May 1985 and January 2018. Based on the results of previous assessment
activities, H&H identified the following potential areas of concern (AOCs) in connection with
the subject Site:

Former Kaiser Fluid Technologies (530 E. Sugar Creek Road)
• Former Settling Tank Excavation Area (AOC #KF-1) - Previous investigations indicate
that a former settling tank located outside the former deburring area of the warehouse
previously received process water tainted with solvents and was the source of volatile
organic compounds (VOCs) contamination in soil and groundwater northwest of the
office/warehouse building. VOCs in groundwater consist of trichloroethylene (TCE),
1,1,1-trichloroethane (1,1,1-TCA), and 1,1-dichloroethene (1,1-DCE). Soil assessment
activities conducted in 2011 indicated hexavalent chromium at levels exceeding the DEQ
Inactive Hazardous Sites Branch (IHSB) Residential Health Based Preliminary Soil
Remediation Goal (PSRG).

• Former Compressors, Receivers, and Transformer Area (AOC #KF-2) - An oil stain was
observed on a former air compressor pad located adjacent and north of the building. The
oil stain appeared to have migrated off of the compressor pad and impacted nearby soil.
Soil assessment activities conducted in 2011 indicated total petroleum hydrocarbons
(TPH) diesel range organics (DRO) and Oil and Grease were below DEQ Action Limits
in the oil stained area. Hexavalent chromium was detected at a concentration above the
Residential PSRG.

• Former TCE Degreaser, Paint Booth, and Numerical Control Lathe Area (AOC #KF-3) -
Kaiser and Ronson operated a TCE degreaser unit, paint booth, and numerical control
lathes in the northern portion of the warehouse area. Heavy oil staining was observed in
the former lathe area. Soil assessment activities conducted in 2011 indicated

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concentrations of hexavalent chromium and TCE in soils at concentrations exceeding
Residential PSRGs. A 2011 groundwater sample from this area indicated a concentration
of total chromium was detected above the 15A NCAC 02L Groundwater Standard (2L
Standard).

• Former RCRA Room (AOC #KF-4) - Kaiser and Ronson stored chemicals, hazardous
waste, and petroleum products within a RCRA room located in the southeastern portion
of the warehouse area. Soil assessment activities conducted in 2011 indicated a
concentration TPH-DRO above the DEQ Action Limit. A 2011 groundwater sample
from this area did not indicate concentrations of VOCs, semi-volatile organic compounds
(SVOCs), or Resource Conservation and Recovery Act (RCRA) metals plus hexavalent
chromium above 2L Standards.

• Loading Dock Area and Former Hazardous Waste Storage Area (AOC #KF-5) - Kaiser
and Ronson reportedly loaded and unloaded chemicals and petroleum products at a
loading dock area located in the southeastern portion of the warehouse. Hazardous waste
materials were also reportedly stored in this area. Soil assessment activities conducted in
2011 indicated the presence of TCE at a concentration of 10 mg/kg, which exceeds the
Industrial PSRG of 4 mg/kg. Additionally, vinyl chloride and hexavalent chromium were
detected at concentrations excceding Residential PSRGs and TPH-DRO was detected
above the DEQ Action Limit.

• Floor Drains in the former Hydraulic Pump and Compressor Room and in the former
“R&O” Room (AOC #KF-6) - During previous assessment activities, H&H identified
trench floor drains located in the concrete floor of the Hydraulic Pump and Compressor
Room, and a floor drain located in the concrete floor of the “R&O” Room. Staining was
identified to the concrete surfaces in the vicinity of both the trench drain and floor drain.
Soil assessment activities conducted in 2011 indicated hexavalent chromium was
detected above the Residential PSRG and TPH-DRO was detected above the DEQ Action
Limit.

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Former Henkel Chemical (600 E. Sugar Creek Road)
• Trench Drains (AOC #H-1) - A network of concrete-filled trench drains was identified in
the former chemical production area of the central portion of the warehouse (referred to
as Warehouse #1). H&H also identified open trench drains in the western portion of the
warehouse (referred to as Warehouse #2). The trench drains were previously connected
to a formerly used wastewater effluent line that extends from the eastern portion of the
warehouse (referred to as Warehouse #1) to a sanitary sewer manhole located north of the
warehouse (referred to as Warehouse #3). Soil assessment activities conducted in 1990
and 1991 indicated the presence of 1,2-dichlorobenzene, 1,4-dichlorobenzene, and the
polychlorinated biphenyl (PCB) Aroclor 1248 above the current Industrial PSRGs. In
addition, numerous metals including aluminum, iron, manganese, and vanadium were
detected above the current Residential PSRGs, although background concentrations of
metals were not determined.

In 1991, Roy F. Weston, Inc. (Weston) excavated impacted soil in the vicinity of the
trench drains located in the central portion of Warehouse #1. Weston collected 76 soil
samples during the excavation activities. Analytical results indicated that PCB Aroclor
1248 impacts remain in soil in the central portion of Warehouse #1. Based upon the
available information, impacted soil was not excavated in Warehouse #3 and soil samples
were not collected adjacent to trench drains in Warehouse #2 or adjacent to trench drains
in the eastern portion of Warehouse #1.

• PCB-containing Heat Transfer Fluid (AOC #H-2) - was used in hot oil systems formerly
located in the boiler room in the southeastern portion of the Henkel building, the
production area in Warehouse #1, and the basement of the research and development
(R&D) building. In 1991, ERM collected wipe samples in each of these areas to be
analyzed for PCBs. Analytical results indicated elevated PCB concentrations in concrete
floor and wall materials.

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In October 1992, concrete was removed from the eastern side of Warehouse #1 and the
northern portion of the boiler room and the underlying soil was analyzed for PCBs.
Analytical results indicated the presence of PCBs above the current Industrial PSRG.
Approximately 588 tons of soil and gravel was excavated from this area for off-Site
disposal; however, the cleanup level at the time of remediation was 5 mg/kg. The current
Industrial PSRGs for PCB constituents are less than 1.0 mg/kg. A complete summary of
soil analytical results and sample locations was not available for review.

In January 2018, H&H collected concrete slab samples from the Henkel building for
laboratory analysis of VOCs and PCBs. The results of analysis indicated one concrete
slab sample, collected from the former boiler room in the southwestern portion of
Warehouse #1, contained PCBs (Aroclor 1248) at a concentration above the Industrial
PSRG. The results of the January 2018 sampling event were provided to DEQ in a
Brownfields Assessment Data Summary dated February 16, 2018 and will be
summarized under separate cover in the future additional assessment report.

• #5 Fuel Oil UST (AOC #H-3) was formerly located adjacent to the southeastern property
boundary. A leak in the product line was reportedly discovered in 1983, and impacted
soil was excavated. The UST and product piping were removed in 1986. Documentation
of remedial soil excavation and UST closure was not provided to H&H for review.

In July 1990, ERM collected two soil samples from the former product line location.
Analytical results indicated the presence of shallow (0-5 feet below ground surface [ft
bgs]) TPH above the DEQ Action Limit.

In October 1991 and October 1992, Weston conducted soil excavation activities south of
the boiler room and in the southwestern portion of the boiler room, respectively.
Reportedly, impacted soil was removed and transported off-Site for proper disposal;
however, post-excavation sampling results were not available for review.

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• Pump Station/Spill Collection Basin (AOC #H-4) - in the 1970s, prior to construction of a
new tank car pump station near the southern property boundary, Henkel utilized a pump
station with a spill collection basin located between Warehouse #1 and the aboveground
storage tanks (ASTs) to the south. Raw products stored in the ASTs were reportedly
spilled in this area. In July 1990, ERM collected a soil sample from 3-4.5 ft bgs in the
western portion of the pumping station. Analytical results indicated the presence of
methylene chloride above the Residential PSRG and benzene above the Industrial PSRG.
Iron and manganese were detected at concentrations above Residential PSRGs.

In October 1992, Weston conducted soil excavation activities in the vicinity of previously
detected soil impacts. Approximately 70 tons of concrete and soil were removed from
this area; however, information regarding post-excavation sampling was not available for
review.

• Former AST Area (AOC #H-5) - consisted of 23 ASTs and a spill collection sump was
located south of Warehouse #1. Reportedly, the ASTs were situated on a gravel surface
until construction of the concrete pad in the 1970s. Raw products including caustics,
acids, mineral oil, vegetable oil, and alcohol were stored in the ASTs. In July 1990,
ERM collected three soil samples (grab and composite) at depth intervals between 4.5
and 6.5 ft bgs. Composite sample results indicated the presence of metals above
Residential PSRGs. The grab sample results did not indicate the presence of soil impacts
above PSRGs.

In July 1999, Triangle Environmental, Inc. (Triangle) collected soil and groundwater
samples from this area. Analytical results indicate the presence of TPH-DRO in soil
above the DEQ Action Limit and chlorobenzene above the 2L Standard. In addition,
H&H collected a groundwater sample from a monitoring well in this area (MW-6) in
September 2011. Analytical results indicated the presence of benzene, chlorobenzene,
1,2-dichlorobenzene, and 1,4-dichlorobenzene at concentrations above 2L Standards.

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• Former Rail Spur (AOC #H-6) - approximately 200 ft of rail spur was formerly located
along the southern property boundary. The spur was constructed in the 1970s and
replaced the former tank car pump station located adjacent to Warehouse #1. Raw
chemical products including caustics, acids, and oils were transferred from tanker trucks
or rail cars to the ASTs. Reportedly, oleic acid was spilled in this area in 1981. A textile
liner was installed approximately 4 inches bgs to prevent environmental impact by future
releases.

In July 1990, ERM dug test pits, advanced hand auger borings, and collected eight soil
samples (grab and composite) from the pump station area. Analytical results indicated
the presence of TPH above the DEQ Action Limit, chlorobenzene above its Residential
PSRG, and metals above Residential PSRGs. In addition, Triangle collected a soil and
groundwater sample from this area in July 1999. Analytical results indicated the
presence of TPH-DRO in soil above the DEQ Action Limit and chlorobenzene in
groundwater above the 2L Standard. Based upon the documents provided, no remedial
action has been taken in this area.

In July 2011, H&H collected additional soil and groundwater samples in the vicinity of
the former tank car pump station. Chlorobenzene was detected in monitoring well MW-7
at 50 µg/L, which is equal to its 2L Standard. VOCs, SVOCs, and PCBs were not
detected in soil above PSRGs. Due to the LYNX light rail expansion project completed
in 2018, monitoring well MW-7 was apparently abandoned and/or destroyed during
construction activities. A concrete paved walkway is currently located along the southern
Site boundary in this portion of the Site.

• Floor Drain – Warehouse #2 (AOC #H-7) - H&H observed an open floor drain in the
eastern portion of Warehouse #2. Significant staining was observed in the vicinity of the
drain. The staining did not appear to be the result of a recent spill; therefore, it is likely
the result of former Henkel operations. Concrete slab in the stained area was sampled by
H&H during the January 2018 sampling event. Analytical results of the concrete slab

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sample collected adjacent to the open floor drain in the stained area did not indicate
VOCs or PCBs at concentrations above laboratory method detection limits.

• Former Isopropyl Alcohol UST (AOC #H-8) - A Screening Site Investigation Report
dated August 17, 1990 prepared by HDR Engineering, Inc. (HDR) identified a former
isopropyl alcohol UST located west of the former AST area. The UST was reportedly
installed in 1978 and removed from the Site in 1983. No information regarding UST
closure was available for review.

• Butyl Stearate Spill (AOC #H-9) - Approximately 8,000 gallons of butyl stearate was
spilled onto the railroad siding located adjacent to the south of the Site during product
transfer from a railcar. The spilled material was reportedly recovered and properly
disposed; however, there is no documentation of cleanup activities or post-cleanup soil or
groundwater assessment.

• Former Storage Building (AOC #H-10) - According to the 1990 HDR report, the former
storage building was utilized in the 1970s to store waste products, PCBs, and PCB-
contaminated oils. The PCB oils were generated during flushing of the facility’s heat
transfer system. H&H observed circular markings on the concrete floor of the building
indicative of former drum storage. No information was provided regarding previous
assessment of this area. Prior to construction of the former storage building, waste drums
were reportedly staged on an uncovered concrete apron which was in the approximate
location of the storage building. The former storage building was razed in the early
2010s with the concrete slab remaining in place.

• Former R&D Lab (AOC #H-11) - H&H observed numerous open floor drains in former
chemical storage areas, testing laboratories, and a boiler room in the R&D building. No
evidence of staining was observed in the vicinity of the drains; however, based upon the
age of the building and knowledge of chemicals historically used at the facility, a
potential exists for impact to the buildings floor drains. The former R&D building was

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razed in early 2014.

• Former Maintenance Shop (AOC #H-12) - According to the 1990 HDR report, a
maintenance shop was formerly located south of Warehouse #1 (former chemical
production area). Although no releases were reported it is likely that chlorinated solvents
or petroleum products were used in the maintenance shop.

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3.0 Brownfields Additional Assessment Scope of Work

The proposed assessment activities will be performed in general accordance with DEQ’s IHSB
Guidelines for Assessment and Cleanup (Guidelines) dated October 2015 and most recent
version of the U.S. Environmental Protection Agency (EPA) Region IV Science and Ecosystem
Support (SESD) Field Branches Quality System and Technical Procedures guidance.

Based upon the previous assessment activities, Site history, current redevelopment plans, and
DEQ requests, H&H prepared a scope of work for additional assessment to evaluate potential
risks associated with future Site development. Our proposed scope of work is presented in the
following sections.

3.1 Utility Clearance

Prior to conducting additional assessment activities, H&H will contact North Carolina One-Call,
the public utility locator to mark subsurface utilities located on the Site. H&H will also hire a
private utility locator to screen proposed boring locations for subgrade utilities that may not be
marked by the public locator. In addition, prior to boring advancement, a hand auger will be
advanced to a depth of approximately 5 ft bgs at each proposed boring location to clear the
boring of potential subsurface utilities (unless conditions indicate that further advancement with
a hand auger is warranted).

3.2 Groundwater Assessment

H&H proposes the installation of six temporary groundwater monitoring wells and sampling of
three existing monitoring wells at the Site as noted below. The temporary monitoring wells will
be advanced with a drill rig utilizing direct push technology (DPT) and/or hollow-stem auger
(HSA) methods. During boring advancement, H&H will record soil lithology and field screen
for the presence of petroleum odors, staining, and/or organic vapors using a calibrated

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photoionization detector (PID). The proposed temporary monitoring well locations and existing
monitoring well locations are depicted on Figure 2 and Figure 3.

Proposed Temporary Monitoring Wells and Groundwater Sample Analysis
Sample
Location/Area of
Concern
Well ID
Anticipated
Boring
Depth (ft)
VOCs by
EPA
Method
8260
SVOCs by
EPA
Method
8270
RCRA
Metals by
EPA
Methods
6020/7471
Northwest
(downgradient)
portion of Kaiser
property
HHTMW-1 25 X X X
West-central portion
of Kaiser property;
AOC #KF-1
HHTMW-2 25 X X X
Central portion of
Kaiser property; AOC
#KF-3
HHTMW-3 25 X X X
Southeast portion of
Kaiser property; AOC
#KF-5
HHTMW-4 25 X X X
Northwest portion of
Henkel property;
AOC #H-2 and H-11
HHTMW-5 25 X X X
Southeast portion of
Henkel property;
AOC #H-5
HHTMW-6* 25 X X X
Northwest portion of
Henkel property MW-2 -- X X X
North-central
(downgradient)
portion of Henkel
property
MW-3 -- X X X

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West of Warehouse
#2 MW-4 -- X X X
South of Warehouse
#1; AOC #H-5 MW-5* -- X X X
South of Warehouse
#1; AOC #H-5 MW-6* -- X X X
Table Notes:
TMW = Temporary Monitoring Well -- = Not Applicable * = If located, existing wells MW-5 and/or MW-6 will be sampled and will replace HHTMW-6
Please note that existing monitoring wells MW-5 and MW-6 were not located during our January
2018 assessment activities and it’s likely the wells have been buried and/or destroyed. H&H will
again attempt to locate and sample existing wells MW-5 and MW-6; however, assuming the well
locations cannot be determined, H&H proposes to install and sample temporary HHTMW-6 in
the vicinity of MW-5/MW-6.

Based on historical groundwater data for the Site, H&H estimates groundwater in the temporary
monitoring wells will be encountered at a depth between approximately 15 ft and 20 ft bgs.
Therefore, the temporary monitoring wells will be advanced to a depth of approximately 25 ft
bgs.

The temporary monitoring wells will be constructed using 1-inch or 2-inch diameter PVC riser
with a 10-ft section of PVC screen set to bracket the water table. A filter sand pack will then be
installed from the bottom of the well boring to approximately 2 ft above the well screen, and a
bentonite seal will be installed above the filter sand pack.

Prior to sampling, H&H will develop/purge the temporary and existing monitoring wells by
removing at least three well volumes using a peristaltic pump or a bailer. Once three well
volumes have been purged, the wells will continue to be purged using low-flow methods until
field parameters of temperature, pH, specific conductivity, and oxidation reduction potential
(ORP) stabilize and turbidity is less than 10 nephelometric turbidity units (NTU), if practical.

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Following stabilization of field parameters, groundwater samples will be collected using low-
flow sampling techniques and “soda straw” sampling method for VOCs. Following sample
collection, samples will be submitted to a North Carolina certified laboratory for analysis of
VOCs by EPA Method 8260, SVOCs by EPA Method 8270, and RCRA metals by EPA Methods
6020/7471. The RCRA metals include arsenic, barium, cadmium, chromium, lead, mercury,
selenium, and silver. The temporary monitoring well locations will be estimated (horizontal and
vertical elevations) using a sub-meter GPS unit. In addition, the top of casing elevations of the
wells will be determined using survey methods to the nearest 0.01 ft.

As required by Mecklenburg County, H&H will obtain a Subsurface Investigation Permit (SIP)
from the Mecklenburg County Land Use and Environmental Services Agency (LUESA) prior to
installing temporary groundwater monitoring wells at the Site. After completion of the activities,
H&H will submit documentation to Mecklenburg County to close out the permit.

3.3 Vapor Intrusion Assessment

To evaluate the potential for vapor intrusion associated with future Site buildings, H&H proposes
to install and sample nine permanent subsurface soil gas monitoring points and four sub-slab
vapor sampling points. Six soil gas samples and four sub-slab vapor samples will be collected
from the former Kaiser portion of the Site and three soil gas samples will be collected from the
former Henkel portion of the Site. The proposed soil gas and sub-slab vapor sample locations
are depicted on Figure 2 and Figure 3. The proposed permanent soil gas and sub-slab vapor
monitoring points will be installed and sampled in general accordance with the DEQ Division of
Waste Management (DWM) Vapor Intrusion Guidance dated March 2018 and as described
below.

The soil gas monitoring points will be installed utilizing DPT methods to advance borings into
the vadose zone and approximately three ft above the estimated depth to groundwater in each
portion of the Site and a minimum depth of five ft below the ground surface. A stainless-steel
screen point fitted with ¼-inch diameter Teflon® tubing will then be advanced within the

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borehole to the maximum depth of the boring. Filter sand will be placed around the annular
space of the sample point and extended to approximately one ft above the bottom of the
borehole. The sampling points will be completed by placing hydrated bentonite and grout from
the top of the filter sand to the ground surface and installation of a lockable vapor point cap,
protective steel cover, and a concrete pad. Using a syringe, each sample point will be purged of
a minimum of three times the volume of the annular space plus the tubing volume. Because the
soil gas points will be installed utilizing DPT methods, each point will be allowed to stabilize for
a minimum of two hours after installation prior to sampling.

To evaluate the potential for vapor intrusion associated with the existing building slab in the
Kaiser portion of the Site, H&H proposes to install and sample four sub-slab vapor monitoring
points at the Site. The proposed sub-slab sample locations are presented on Figure 2. The sub-
slab vapor points will be installed by utilizing a hammer drill and 1½-inch diameter drill bit to
advance a pilot hole into the concrete slab to a depth of approximately 1¾ inches below the
surface. A drill guide will then be placed in the pilot hole, and a 5/8-inch diameter drill bit will
be utilized to advance the boring through the concrete slab. Following concrete borehole
advancement, loose concrete cuttings will be removed from the boring using a bottlebrush and
high efficiency particulate air (HEPA) vacuum. A Cox-Colvin Vapor Pin™ (vapor pin)
assembly (brass sampling point and silicone sleeve) will be seated in the borehole using an
installation/extraction tool and hammer. The vapor pins will be installed as flush-mount sample
points capable of being secured with a stainless-steel cover that screws onto the sampling point
and is seated within the pilot hole annulus.

Prior to sampling the soil gas and sub-slab vapor monitoring points, a leak check will be
conducted at each location by constructing a shroud around the monitoring point and flooding
the air within the shroud with helium gas. Using a syringe, a sample will be collected from the
gas in the shroud into a Tedlar® bag and analyzed for helium concentrations using a helium gas
detector. Vapor from the monitoring points will be purged and sampled outside of the shroud
into a separate Tedlar® bag and analyzed using the helium gas detector to ensure that helium
concentrations are less than 10% of the concentration measured within the shroud.

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Following a successful field leak check, the soil gas and sub-slab samples will be collected into
one-liter Summa canisters for laboratory analysis by connecting the Teflon® sample tubing to an
airflow regulator using a brass nut and ferrule assembly to create an air tight seal. Shut-in leak
tests will be performed on each Summa canister and sampling train prior to sampling. The
airflow regulator will be calibrated by the laboratory to allow the Summa canisters to fill slowly
at a rate not greater than 200 milliliters per minute. The vacuum pressure in each Summa
canister upon completion of the sampling event will be between three and six inches of mercury.
Upon completion of sample collection, the air flow regulator will be removed from the Summa
canister and the samples will be submitted to a nationally accredited laboratory under standard
chain of custody protocols for analysis of VOCs by EPA Method TO-15. Upon receipt of the
samples, the laboratory will record the final received vacuum pressure for each Summa canister.
The soil gas and sub-slab vapor monitoring point locations will be estimated using a sub-meter
GPS unit.

3.4 Soil Assessment

To evaluate soils which may be disturbed during future Site redevelopment activities and/or most
likely to pose a direct contact exposure concern, H&H proposes to advance 31 soil borings
across the Site. Twelve proposed soil borings will be advanced in the former Kaiser portion of
the Site and 17 proposed soil borings will be advanced in the former Henkel portion of the Site.
The proposed soil boring locations are depicted on Figure 2 and Figure 3.

After advancing the soil borings to an approximate depth of 5 ft bgs with a decontaminated
stainless-steel hand auger, a track-mounted DPT rig will be utilized to advance the soil borings to
approximately 10 ft bgs. Continuous soil samples will be collected from the borings using
acetate lined macrocore sleeves. Soil samples will be logged for lithological description and
field screened for indication of potential impacts by observation for staining, and the presence of
organic vapors using a calibrated PID. Based upon the field screening results, H&H will collect
one sample per boring for laboratory analysis. In selecting soil samples for laboratory analysis,

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preference will be given to those samples in the upper 5 ft of the soil column because this zone is
the most likely interval to be disturbed during future development activities and/or most likely
pose a direct contact exposure concern.

Following collection, the soil samples will be placed in dedicated laboratory-supplied sample
containers, labeled with the sample identification, date, and requested analysis, and placed in a
laboratory supplied cooler with ice. The samples will be delivered to a North Carolina certified
laboratory under standard chain of custody protocols for analysis of VOCs by EPA Method
8260, SVOCs by EPA Method 8270 and RCRA metals plus hexavalent chromium by EPA
Methods 6020/7471/7199. Additionally, samples collected from the former Henkel portion of
the Site will be analyzed for total PCBs by EPA Method 8082. In addition, H&H will collect
soil samples for PCB congeners by EPA Method 6009, and request that the laboratory hold the
samples pending analytical results for samples analyzed for PCBs by EPA Method 8082. If
PCBs are detected in soil samples using EPA Method 8082, H&H will contact DEQ to discuss
analyzing that sample for congener specific analysis.

In addition, four background soil samples will be collected to assess naturally occurring
concentrations of metals in soil at the Site. The locations of the background soil borings will be
determined in the field and will be collected from areas that do not appear to have been impacted
from historical operations. The background soil samples will be analyzed for RCRA metals plus
hexavalent chromium by EPA Methods 6020/7471/7199 only.

3.5 Receptor Survey

H&H will perform a Brownfields receptor survey in accordance with DEQ Brownfields Section
guidance. The receptor survey will include information about land use in the Site area including
zoning. H&H will conduct a field search for water supply wells, basements, utility manways and
chases, storm sewers, other underground utilities, drains, and surface water within a 1,500 ft
radius of the Brownfield property boundaries. In addition, public water supply wells will be
identified within one mile of the Brownfield property boundaries. Additionally, H&H will

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review the online Mecklenburg County well information system about potential wells in the area
and, if warranted, contact the utility companies for information concerning underground utilities
in the immediate area of the Site.

3.6 Quality Assurance/Quality Control

For field and laboratory quality assurance/quality control (QA/QC) purposes, H&H will collect
one duplicate sample per 20 samples from each media sampled per method. Sufficient sample
will be collected in the field in order to perform the duplicate analyses and the duplicate samples
will be analyzed for the same compounds as the parent sample. A laboratory supplied trip blank
will be placed into the laboratory supplied cooler that is used for water samples to be analyzed
for VOCs and will accompany field personnel during water sample collection activities. The trip
blank will be analyzed for VOCs by EPA Method 8260.

In addition, H&H will request a Level II QA/QC data package from the laboratory and the
laboratory will report values to the laboratory-specified method detection limits using J-flags.

3.7 Boring Abandonment and Investigation Derived Waste

Upon completion of the groundwater, soil gas, and soil sampling activities, H&H will direct the
DPT contractor to abandon the borings with bentonite and/or grout. The well materials will be
removed from the temporary monitoring well boreholes prior to abandonment. Soil cuttings and
groundwater generated during additional assessment activities in the “area of concern” identified
on Figure 2 in the southeastern portion of the Henkel site will be containerized, sampled, and
thin spread on-Site only if analytical data indicates is not significantly impacted. Soil cuttings
and groundwater generated in areas outside the “area of concern” will be spread on-Site unless
there is evidence of significant impact (such as free product). If there is evidence of significant
impact, the investigation derived waste from that area will be containerized in 55-gallon drums.
If wastes are containerized, then a composite sample of the materials will be obtained for waste
disposal purposes.

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4.0 Reporting

Upon completion of the field activities and receipt of the analytical data, H&H will prepare a
report which describes the methods and results of the January 2018 assessment and the additional
assessment activities. The report will include a description of field activities, a tabular summary
of the analytical results and historical data in comparison to regulatory screening levels, copies
of boring logs, a figure depicting the sample locations, laboratory analytical reports including
chain of custody, a discussion of QA/QC data, results of the receptor survey, and conclusions
based upon our assessment activities.

Figures
0 2000 4000
APPROXIMATE
SCALE IN FEET
N
U.S.G.S. QUADRANGLE MAPS
QUADRANGLE
7.5 MINUTE SERIES (TOPOGRAPHIC)
TITLE
PROJECT
SITE LOCATION MAP
KAISER TECH II
530 and 600 E. SUGAR CREEK ROADCHARLOTTE, NORTH CAROLINA
DATE:
JOB NO:
REVISION NO:
FIGURE:
12-13-17 0
1AMK-011
Derita, NC 1993
530 E. Sugar Creek Road
2923 S. Tryon Street, Suite 100Charlotte, NC 28203
704.586.0007(p) 704.586.0373(f)
600 E. Sugar Creek Road
MW-11SB-3RALEIGH STREETEAST SUGAR CREEK ROADFORMER METROLINAFAMILY PHYSICIANS(420)CONCRETE SUPPLYCOMPANY(3940)GENERALBONDEDWAREHOUSE(4001)FORMER HENKEL SITE(600)TRYONMALLCLEANERS(451)COTTSMANTRANSMISSION(501)PARKING LOTMW-10MW-5RW-2RW-1RW-4RW-3MW-1MW-2MW-8MW-3MW-7MW-4MW-6SB-6/TMW-2SB-2SB-4SB-5SB-7SB-8SB-12SB-13SB-11SB-10COMPRESSORS,RECEIVERS ANDTRANSFORMERFORMERDEBURRINGAREAFORMERSETTLINGTANKFORMERTCE DEGREASEROLDBOILERROOMFORMERDESIGN/ENGINEERINGFORMEROFFICE/ADMINFORMEROFFICE/ADMINFORMER RCRAROOMFORMERR & OROOMFORMERENG.LABFORMERASSEMBLYFORMER HYDRAULICPUMPS ANDCOMPRESSORS ROOMFORMER HAZARDOUSWASTE STORAGE AREALOADINGDOCKFORMERGRINDING FORMERTOOLING/MILLINGFORMERNUMERICALCONTROL LATHESFORMERPAINT BOOTHCONCRETEPATCHEDPITS(FORMERPHILLIP 66)RW-1APAINT BOOTHSUMPKAISER FLUIDS TECH II530 EAST SUGAR CREEK ROADCHARLOTTE, NORTH CAROLINA SAMPLE LOCATION MAPSB-1/TMW-1MW-9SB-9/TMW-3LEGENDSITE PROPERTY BOUNDARYFENCE LINEABANDONED GROUNDWATERMONITORING WELLSOIL BORING (SEPTEMBER 2011)SOIL BORING AND TEMPORARYMONITORING WELL (SEPTEMBER 2011)PROPOSED SOIL BORINGPROPOSED SOIL BORING ANDTEMPORARY MONITORING WELLPROPOSED TEMPORARY MONITORINGWELLPROPOSED SOIL GAS SAMPLEPROPOSED SUB-SLAB VAPOR SAMPLEFLOOR DRAINTRENCH DRAINFORMER SETTLING TANK EXCAVATIONSTORM DRAIN2923 South Tryon Street-Suite 100Charlotte, North Carolina 28203704-586-0007(p) 704-586-0373(f)License # C-1269 / #C-245 GeologyAOC #1 - FORMER SETTLINGTANK EXCAVATION AREAAOC #3 - FORMER TCEDEGREASER, PAINT BOOTH,AND LATHE AREAAOC #2 - FORMERCOMPRESSORS, RECEIVERS,AND TRANSFORMER AREAAOC #6 - FLOOR DRAINS INFORMER PUMP / COMPRESSORAND R & O ROOMSAOC #4 - FORMER RCRAROOMAOC #5 - LOADING DOCK ANDFORMER HAZARDOUS WASTESTORAGE AREAHHTMW-1HHTMW-2HHTMW-3HHTMW-4S:\AAA-Master Projects\Anthony Kuhn - AMK\AMK-011 Henkel-Kaiser BF Site\Figures\Site Map-R1.dwg, FIG 2, 8/23/2018 5:16:03 PM, erichardson
FORMER HENKEL
CHEMICAL
CORPORATION
E. SUGAR
CREEK
DR
IVE
BR
IDGE
(UNDER
DEVELOPMENT
)
GRAVEL
RALEIGH STR
E
E
T
VACANT
WAREHOUSE
(3745 N. DAVIDSON STREET)
BLUE RIDGE RECYCLING/
ALLIED PRODUCTS
(3811 N. DAVIDSON STREET)
VACANT
WAREHOUSE
(3801 N. DAVIDSON STREET)
ALL AMERICAN PAWN
(724 E. SUGAR CREEK ROAD)
RIVERSIDE MILLWORK
(4000 RALEIGH STREET)
CONCRETE
HAVEAFIL
(4001 RALEIGH STREET)
FORMER KAISER
FLUID TECHNOLOGIES
(530 E. SUGAR CREEK ROAD)
SUPERIOR DISTRIBUTION
(6001 E. SUGAR CREEK ROAD)FORMER RESEARCH AND DEVELOPMENT LAB
(REMOVED IN 2012)
TRUCK SCALE
RAMP TO
BASEMENT
WAREHOUSE #3
OFFICES
WAREHOUSE #2
(STORAGE)
WAREHOUSE #1
(FORMER PROCESS AREA)
CATS LYNX L
I
G
H
T

R
A
I
L

L
I
N
E
NORFOLK SOU
T
H
E
R
N

R
A
I
L
R
O
A
D
RESIDENCES
MW-2
MW-3
MW-4
MW-7
MW-5
MW-6
LOADI
N
G

D
O
C
K
CONCRETE-LINED
PIT
PARKING GARAGE CATS
LYNX LIGHT RAIL
SSVP-8
SSVP-7
SSVP-6
SSVP-4
SSVP-5
SSVP-3SSVP-2
SSVP-1
CS-8
CS-7
CS-3
CS-5
CS-4
CS-6
CS-2
CS-1
AOC #1 - CONCRETE
FILLED DRAINS
AOC #2 - FORMER BOILER
ROOM AND PCB HOT OIL
SYSTEM
AOC #12 - FORMER
MAINTENANCE SHOP
AOC #3 - FORMER #5
FUEL OIL UST
AOC #5 - FORMER AST
AREA
AOC #4 - FORMER TANK
CAR PUMP STATION
AOC #6 - FORMER SOUTH
TANK CAR PUMP STATION
AOC #9 - 8,000 GALLON
BUTYL STEARATE SPILL
AOC #8 - FORMER
ISOPROPYLALCOHOL UST
AOC #10 - FORMER STORAGE
BUILDING (FORMER PCB STORAGE)
(REMOVED IN 2012)
AOC #7 - OPEN
FLOOR DRAIN
AOC #2 FORMER
BOILER ROOMS
AOC #11 - OPEN
FLOOR DRAINS
SUGAR CREEK
STATION STATION
WALKWAY
KAISER FLUIDS TECH II
600 EAST SUGAR CREEK ROAD
CHARLOTTE, NORTH CAROLINA
SAMPLE LOCATION MAP
LEGEND
SITE PROPERTY BOUNDARY
RAILROAD TRACKS
FORMER RAILROAD SIDING
FENCE LINE
FORMER WASTEWATER EFFLUENT
LINE FROM TRENCH DRAINS
FLOOR DRAINS
CATCH BASIN
PAD-MOUNTED TRANSFORMER
POLE-MOUNTED TRANSFORMER
MONITORING WELL LOCATION
ABANDONED MONITORING WELL
LOCATION
SUB-SLAB VAPOR SAMPLE
(JANUARY 2018)
CONCRETE SLAB SAMPLE
(JANUARY 2018)
2923 South Tryon Street-Suite 100Charlotte, North Carolina 28203704-586-0007(p) 704-586-0373(f)License # C-1269 / #C-245 Geology
PROPOSED SOIL BORING
PROPOSED SOIL GAS SAMPLE
PROPOSED TEMPORARY WELL
HHTMW-6
HHTMW-5
S:\AAA-Master Projects\Anthony Kuhn - AMK\AMK-011 Henkel-Kaiser BF Site\Figures\Proposed Sample Location Map-R1.dwg, FIG 3, 8/23/2018 5:19:03 PM, erichardson