13011_Kolortex BAR 20140127

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Table of Contents

Section Page No.
1.0 Introduction and Background .................................................................................................... 1
1.1 Brief Site History .................................................................................................................... 1
1.2 Previous Assessment and Remedial Activities ...................................................................... 1
2.0 Groundwater Sampling .................................................................................................................. 5
2.1 Methods ................................................................................................................................... 5
2.2 Results ..................................................................................................................................... 6
3.0 Vapor Intrusion Assessment .......................................................................................................... 8
3.1 Sub-Slab Vapor Sampling ...................................................................................................... 8
3.1.1 VMP Installation ...................................................................................................... 8 3.1.2 Sampling Methods ................................................................................................... 8 3.1.3 Analytical Results .................................................................................................. 10
3.2 Indoor Air Sampling ............................................................................................................. 10
3.2.1 Sampling Methods ................................................................................................. 11 3.2.2 Analytical Results .................................................................................................. 12
4.0 Conclusions and Recommendations ........................................................................................... 14

List of Tables

Table 1 Summary of Groundwater Analytical Data
Table 2 Summary of Sub-Slab Vapor Analytical Data
Table 3 Summary of Indoor Air Analytical Data

List of Figures

Figure 1 Site Location Map
Figure 2 Site Map and Sample Locations
Figure 3 Groundwater Assessment Data Map
Figure 4 Sub-Slab Vapor PCE Concentration Map
Figure 5 Indoor Air PCE Concentration Map

List of Appendices

Appendix A Subsurface Investigation Permit and Boring Logs/Well Construction Diagrams
Appendix B Groundwater Sampling Form
Appendix C Indoor Air Sampling Field Measurement Data
Appendix D Laboratory Analytical Data

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Brownfields Assessment Report Kolortex Site
Charlotte, North Carolina
H&H Job No. CRH-001

1.0 Introduction and Background

This report presents the methods and results of Brownfields assessment activities conducted by
Hart & Hickman, PC (H&H) at the Kolortex Brownfields site located at 2900 Horseshoe Ln. in
Charlotte, North Carolina. A site location map is provided as Figure 1, and a site map is provided
as Figure 2. The subject property contains approximately 11 acres that are improved with an
approximate 110,000-sq ft office and warehouse building, associated asphalt parking areas, and a
former concrete wastewater basin. The primary site building was constructed in 1978.

1.1 Brief Site History

Kolortex/Callaghan Textiles operated at the site from 1978 until 1996 and conducted textile dyeing
and finishing. The facility was vacant until 1998 when it was leased to Vibrachem. Vibrachem
conducted cleaning of metal parts using vibration, cleaning solutions, and ceramic media.
Vibrachem leased the property until August 2003 when it vacated the property due to breach of
lease. The facility has been used for limited warehousing and distribution operations since that
time.

1.2 Previous Assessment and Remedial Activities

In October 2004, the North Carolina Department of Environment and Natural Resources (DENR)
Hazardous Waste Section conducted an inspection at the facility and identified approximately 75
abandoned containers stored on the property. The containers had been abandoned by the former
site tenant Vibrachem. In 2003, the then property owner Salvista Trading, LLC terminated
Vibrachem’s lease agreement due to breach of the lease agreement.

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In a letter dated October 13, 2004, DENR issued a Notice of Violation (NOV) to Salvista Trading
requiring that the containers be removed, sludge from the concrete wastewater basin be removed,
and a site assessment be conducted. In August 2005, LandAmerica Assessment Corporation and
A&W Professional Services, PLLC (collectively LAC/A&W) conducted sampling activities at
potential areas of concern in response to the DENR NOV. LAC/A&W collected 12 samples from
the following five areas of concern (these areas are depicted in Figure 2):

• Drum Storage Area #1;
• Drum Storage Area #2;
• Near a stormwater catch basin in the eastern portion of the site;
• Near the outfall of a stormwater pipe in southeastern portion of the site; and
• The concrete temporary wastewater holding basin.

Seven soil samples were collected from Drum Storage Area #1, two soil samples were collected
in Drum Storage Area #2, two soil samples were collected at the Eastern Stormwater Catch Basin,
and one soil sample was collected at the Stormwater Outfall. In addition, LAC/A&W collected a
water sample and solid sample from the concrete temporary wastewater holding basin. Of the 12
soil samples submitted for laboratory analysis, seven soil samples contained concentrations of oil
and grease (O&G) above the DENR Underground Storage Tank (UST) Section cleanup level at
the time of 250 mg/kg. The concentrations above the DENR screening level ranged from 360
mg/kg to 28,000 mg/kg. Five of the elevated O&G samples were collected from Drum Storage
Area #1, and the remaining two were collected from Drum Storage Area #2 and the Eastern
Stormwater Catch Basin.

The soil sample collected from the outfall of the stormwater pipe in the southeastern portion of the
site contained three polynuclear aromatic hydrocarbons (PAHs) above screening levels. In
addition, one soil sample collected from Drum Storage Area #1 contained tetrachloroethene (PCE;
0.011 mg/kg). The laboratory results for the surface water and sludge samples did not indicate
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compound concentrations above toxicity characteristic hazardous waste levels.

In a letter dated January 19, 2006, DENR requested that Salvista Trading remove the materials
from the concrete basin and identified soil impacts from the Stormwater Outfall, Eastern
Stormwater Catch Basin, Drum Storage Area #1, and Drum Storage Area #2. A Corrective Action
Work Plan was submitted to DENR in October 2007 for these activities. However, the work plan
activities were never implemented by Salvista Trading. In 2008, the current property owner
Carolina Realty Holdings (CRH) obtained title to the property by foreclosure of a security interest
it held. Because CRH obtained the property through foreclosure, it is not considered a responsible
party with regard to the RCRA activities.

Although CRH did not have responsibility for cleanup of the identified impacts, in February and
March 2009, CRH requested that H&H remove soil in the areas of concern and clean out the
concrete basin. A total of approximately 431 tons of impacted soil were removed from the
Stormwater Outfall, Eastern Stormwater Catch Basin, Drum Storage Area #1, and Drum Storage
Area #2. Analytical results of post-excavation confirmation samples indicated that soil impacts in
these areas had been adequately removed except for the presence of PAHs in the area of the
stormwater outfall. In the stormwater outfall, PAHs were detected above DENR Inactive
Hazardous Sites Branch (IHSB) protection of groundwater, residential, and industrial preliminary
soil remediation goals (SRGs). In addition, H&H removed the water and sludge from the concrete
basin, pressure washed the basin, and disposed of the water and sludge off-site.

In April 2009, to assess the potential for impact from the former use of the site for textile dyeing,
H&H collected soil samples from six borings in the area of several covered trenches in the
building. The locations of the soil borings, labeled HA-7 through HA-12, are depicted in Figure
2. Results of analysis of the soil samples indicated the presence of tetrachloroethene (PCE) and
its daughter products in soil samples below the site building. The detected PCE concentrations
exceeded DENR protection of groundwater SRGs but did not exceed residential or industrial direct
contact SRGs.
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In May 2009, CRH submitted a Brownfields Property Application for the site, and DENR issued
a Letter of Eligibility for the Brownfields program in July 2009. In a letter dated September 14,
2009, DENR requested additional assessment as part of the Brownfields process. Specifically,
DENR requested groundwater sampling and sub-slab soil vapor sampling. H&H submitted a
Brownfields Assessment Work Plan for the additional assessment activities dated September 9,
2013 and, based upon DENR comments, a revised work plan dated September 24, 2013. DENR
approved the revised work plan on September 26, 2013. The following sections describe the
methods, results, and conclusions of the Brownfields assessment activities.
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2.0 Groundwater Sampling

2.1 Methods

On October 14, 2013, H&H installed and sampled one temporary groundwater monitoring well
(TMW-1) south of the warehouse building at the site. The approximate location of the temporary
well is indicated in Figure 2. In accordance with the assessment work plan, H&H attempted to
install an additional temporary well on the east side of the building. Attempts were made at four
locations east and southeast of the building; however, drilling refusal was encountered prior to
reaching the water table at each of these locations. The locations of these attempted locations,
labeled TMW-2A through TMW-2D, are presented in Figure 2.

Prior to the well installation activities, H&H obtained a Subsurface Investigation Permit (SIP No.
70002105) from the Mecklenburg County Land Use and Environmental Services Agency
(LUESA). A copy of the SIP is provided in Appendix A. In addition, H&H notified the North
Carolina One-Call Center and contracted a private utility locator to identify subsurface utilities.

H&H contracted Probe Technologies to install the temporary wells using a track-mounted
Geoprobe® 7822DT direct-push technology (DPT) drill rig. During boring advancement,
continuous soil samples were collected from the borings using a macro-core sampler lined with
acetate sleeves. Soil borings were described for lithologic purposes, inspected for the presence of
staining and odors, and field-screened for the presence of volatile organic compounds (VOCs) with
a calibrated photo-ionization detector (PID). Borings logs are provided in Appendix A.

Temporary well TMW-1 was advanced to a depth of 42 ft where DPT refusal was encountered.
The well was constructed of 1-inch diameter PVC casing and a 15 ft section of pre-pack well
screen at the bottom of the well, which was positioned to be across the water table. Groundwater
in the well was approximately 28 ft below ground surface. Additional filter sand pack was installed
from the bottom of the temporary well boring to approximately 2 ft above the PVC well screen,
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and a 2 ft thick bentonite seal was then installed above the filter sand pack. Temporary well
construction information is provided on the boring log included in Appendix A.

Following installation and development, the temporary monitoring well was purged using low-
flow techniques with a peristaltic pump and dedicated polyethylene tubing until field
measurements of pH, conductivity, temperature, and turbidity stabilized. Final sample turbidity
was 9.71 NTU. Following stabilization, groundwater samples were collected into laboratory-
supplied containers2. A copy of the groundwater sampling record is provided in Appendix B.

Upon collection, the groundwater sample was immediately placed in an iced sample cooler. A
chain-of-custody record was completed for the collected groundwater samples and included the
sample description, date collected, time collected, matrix, sample container information, and
analyses required. The chain-of-custody was signed by H&H prior to delivery to Prism Laboratory
for analysis of volatile organic compounds (VOCs) by EPA Method 8260, semi-VOCs by EPA
Method 8270, and the hazardous substance list (HSL) metals (antimony, arsenic, beryllium,
cadmium, chromium, copper, lead, manganese, mercury, nickel, selenium, silver, thallium, and
zinc). Following sampling, the temporary well was abandoned in accordance with DENR
regulations.

2.2 Results

The results of analyses of the groundwater sample collected from TMW-1 are presented in Table
1 and Figure 3. The laboratory analytical report and chain of custody record are provided in
Appendix D. The analytical results were compared to the North Carolina 2L groundwater
standards and the DENR IHSB Non-Residential Vapor Intrusion Screening Levels.

The analytical results of the sample collected from TMW-1 indicated that the VOCs
tetrachloroethene (PCE), cis-1,2-dichloroethene, 1,1-dichloroethene, and 1,1-dichloroethane were
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detected above laboratory reporting limits. Of the compounds detected, only PCE (51 µg/L) was
detected at a concentration above the groundwater standard (0.7 µg/L) and the IHSB Non-
Residential Groundwater Screening Level (48.4 µg/L). Concentrations of other VOCs were less
than 1 µg/l.

No SVOCs were detected above laboratory reporting limits in the sample collected from TMW-1.
The metal manganese was detected at a concentration of 0.085 mg/L which slightly exceeds the
groundwater standard of 0.05 mg/L. Based upon our experience, it is likely that the detected
manganese concentration represents a naturally occurring background concentration. No other
metals were detected in the sample.
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3.0 Vapor Intrusion Assessment

3.1 Sub-Slab Vapor Sampling

As part of the additional assessment activities conducted at the site in October 2013, H&H
collected sub-slab soil vapor samples from six soil vapor monitoring points (SVP-1 through SVP-
6) inside the site building. Vapor monitoring point (VMP) locations are provided on Figure 2.
The VMP locations were distributed throughout the site building to evaluate the potential for vapor
intrusion into the different subdivisions of the warehouse and office buildings. SVP-1 through
SVP-4 were installed in the warehouse areas, and SVP-5 and SVP-6 were installed below the office
building. Note that SVP-3 could not be located in the southwestern portion of the warehouse
because that portion of the building was not accessible. Therefore, SVP-3 was located just outside
the inaccessible area.

3.1.1 VMP Installation

VMP installation was conducted by H&H personnel on October 10 and 11, 2013. At each location,
a rotary hammer drill was utilized to install a 1.5-inch diameter boring through the concrete slab
at each VMP location. The concrete slab was noted to be four to six inches thick at each VMP
location. A dedicated stainless steel vapor sample point fitted with ¼-inch Teflon® tubing was
then installed through each borehole and seated just beneath the top of the gravel base material or
soil underlying the concrete slab. Filter sand was then poured through each borehole to
approximately five inches below the top surface of the concrete slab and the borehole was sealed
by installing hydrated bentonite from the top of the sand to the surface of the slab.

3.1.2 Sampling Methods

Prior to sampling, a field leak check was performed at each VMP by constructing a shroud around
the sampling point and saturating the air within the shroud with helium gas. Helium concentrations
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inside the shroud were measured using a helium gas detector and were maintained at
concentrations of approximately 90%. Using a syringe and three-way valve, the Teflon tubing and
surrounding sand pack were purged of approximately three volumes. Following purging, a sample
was collected from the tubing into a Tedlar® bag and analyzed for helium concentrations to ensure
that concentrations were less than 5% of the helium concentrations in the shroud.

Following successful field leak checks, H&H personnel connected the VMP tubing to a 6-liter
Summa canister fit with a flow controller pre-set by the laboratory to regulate the vapor intake rate
to 6-liters per hour. H&H personnel measured and recorded the initial vacuum in the canister prior
to the start of sampling of each VMP and verified that the sample train was air tight following
connection of the controller to the canister. The flow controller was then connected to the VMP
tubing and the Summa canister’s valve was fully opened to begin collection of the sub-slab vapor
sample. During sampling at each location, a helium tracer gas atmosphere was maintained at the
surface of each soil vapor point to demonstrate that there was not short circuiting to the surface
during the test. To ensure a sufficient helium atmosphere was maintained during sampling, H&H
monitored helium levels within the shroud and added helium as needed to maintain an 80 to 90%
helium atmosphere.

After more than one hour of sample collection at the VMP, the Summa canister’s valve was closed,
the regulator was disconnected from the canister and the VMP tubing, and the final vacuum inside
the canister was measured and recorded. Summa canisters were properly labeled, packaged, and
shipped to Con-Test Analytical Laboratories in East Longmeadow, MA under standard chain of
custody protocols for analysis of VOCs by EPA Method TO-15 and for helium by EPA Method
3C.

After collection, each of the points was abandoned and the surface was patched.

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3.1.3 Analytical Results

A summary of the sub-slab vapor analytical data is presented in Table 2. The sub-slab vapor
laboratory analytical data report is included in Appendix D. The concentrations of compounds
detected in the vapor samples were compared to the DENR Inactive Hazardous Sites Branch
(IHSB) Non-Residential Soil Gas Screening Levels (SGSLs). Please note that the SGSLs are
based upon conservative exposure factors and exposure scenarios.

As indicated in Table 2, multiple compounds were detected in the samples; however, PCE was the
only compound detected above the SGSL in three of six samples. PCE was detected above the
Non-Residential SGSL of 3,500 µg/m3 in samples SVP-1 (5,100 µg/m3) in the northeastern portion
of the warehouse, SVP-2 (110,000 µg/m3) in the southeastern portion of the warehouse, and SVP-
4 (4,000 µg/m3) in the northwestern portion of the warehouse. Only low concentrations of PCE
below the SGSL were detected in SVP-3 (16 µg/m3), SVP-5 (0.72 µg/m3), and SVP-6 (0.99
µg/m3). PCE concentrations and sampling locations are depicted on Figure 4.

Helium was only detected in SVP-3 at a concentration of 1.9%, which is less than 5% of the
concentration maintained in the shroud for the duration of sample collection. As such, there is no
evidence of significant short circuiting of ambient air into the vapor probes during the sampling.

3.2 Indoor Air Sampling

Based upon the results of the subslab soil vapor sampling which indicated compound
concentrations above DENR SGSLs and in accordance with the approved work plan, H&H
submitted proposed indoor air sampling locations to DENR in an email dated November 14, 2013.
In an email dated December 9, 2013, DENR approved the indoor air sampling locations to further
evaluate the vapor intrusion pathway.

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On December 20, 2013, H&H collected indoor air samples in the site warehouse building. The
indoor air samples were collected in the following locations:

• Two indoor air samples (identified as IAS-1 and IAS-3) were collected from the northern
portion of the warehouse building in the area of subslab sampling points SVP-1 and SVP-
4.
• One sample (identified as IAS-2) was collected from the southern portion of the warehouse
near previous subslab sample SVP-2.
• In addition to the indoor air sample locations, one exterior background sample (identified
as BAS-1) was collected from an upwind location outside the site building during the
indoor air sampling event.

3.2.1 Sampling Methods

The indoor air samples were collected using 6-liter Summa canisters. Each Summa canister was
connected to an airflow regulator and a 3 ft long sampling cane placing the sample intake point
approximately 5 ft above grade (typical breathing zone height). Prior to the sampling event, H&H
set up a small weather station, measured the wind direction, and selected an exterior background
location upwind of the site building. Because the wind direction was measured to be from the
southeast, the background sample location was selected southeast of the site building. The location
of the background sample, identified as BAS-1, is indicated in Figure 5. The background sample
was collected in the same manner as the interior sample locations.

The indoor and background sample were collected over an approximate 8-hour period. As part of
the sampling effort, H&H also measured the indoor/outdoor air pressure differential at each sample
location near the start, middle, and end of the 8-hour sampling period using a manometer sensitive
to 0.001 inches water. In addition, outdoor temperature, wind speed, wind direction, barometric
pressure, and indoor temperature were recorded several times throughout the sampling period
using the weather station and manometer.
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Please note that the locations where samples were collected are generally used only for storage by
the current tenants of the warehouse, the doors remained closed during the testing period, and no
ventilation systems were operating. Therefore, the sample conditions are considered worst case.

After sample collection, the Summa canisters were properly labeled, packaged, and shipped to
ESC Lab Science located in Mt. Juliet, TN for analysis of the following compounds: PCE,
trichloroethene (TCE), cis-1,2-dichloroehtene (cis-1,2-DCE), trans-1,2-DCE, and vinyl chloride
by EPA Method TO-15. The laboratory analytical report and chain-of-custody record are provided
in Appendix D.

As part of the indoor air sampling, H&H also conducted a survey of stored materials and products
in the areas of the building where the samples were collected to determine if there were potential
sources of the analyzed compounds in the warehouse which could affect the sample results. H&H
did not identify products or materials being stored that contained the analyzed compounds.

3.2.2 Analytical Results

Field Measurements
A tabular summary of the results of the air field measurement data (including temperature,
barometric pressure, wind direction and speed, and differential pressure) collected during the
sampling is included in Appendix C. As indicated in the table, positive differential pressure
between indoor and outdoor air was observed during the sampling indicating that the building
appeared to be under slightly positive pressure relative to outdoor air. Wind direction originated
from the southeast during the beginning of the sampling event and shifted to a southwesterly flow
and remained consistent throughout the remainder of the event. Wind speeds ranged from 5 to 12
miles per hour. Outdoor air temperatures during the testing ranged from 47 to 61 degrees F. Indoor
air temperatures during the testing ranged from 45 to 56 degrees F, and no precipitation was
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observed during the sampling event. There were no HVAC systems operating in the spaces at the
time of the sampling.

Indoor Air Analytical Data
The results of analysis of the indoor air samples collected from the site are summarized in Table
3, and the laboratory analytical results are included in Appendix D. The indoor air analytical data
for PCE are depicted on Figure 5. The indoor air sampling results were compared to the DENR
IHSB Non-Residential Indoor Air Screening Levels (IASLs). The IASLs are conservative
screening levels that are based upon a lifetime incremental cancer risk (LICR) of 1 x 10-6 for
potential carcinogenic effects and a hazard index (HI) of 0.2 for noncarcinogenic effects.
Typically, mitigation for an industrial facility is not considered until the cumulative LICR is
greater than 1 x 10-4 and the cumulative HI is greater than 1.

The results of analysis of the samples indicate that PCE was detected above laboratory reporting
limits in IAS-1 through IAS-3 at concentrations ranging from 2.2 to 4.1 µg/m3. These
concentrations are an order of magnitude less than the IASL for PCE of 35 µg/m3. No other VOCs
were detected above laboratory reporting limits in the samples. There were no analyzed
compounds detected in the outdoor background air sample BAS-1.

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4.0 Conclusions and Recommendations

H&H has completed Brownfields assessment activities at the Kolortex site located at 2900
Horseshoe Lane in Charlotte, North Carolina. The following is a summary and recommendations
concerning our activities as it relates to redevelopment of the site:

• Results of previous soil sampling conducted at the site indicated the presence of several
PAHs above DENR direct contact SRGs in the stormwater outfall in the southeastern
portion of the site. H&H recommends that these soil impacts be managed in accordance
with an Environmental Management Plan should future site activities warrant disturbance
of this soil. No soil impacts above direct contact SRGs were identified in other areas of
the site.

• Results of analysis of a groundwater sample collected downgradient of the site building
indicate the presence of a low concentration of PCE in groundwater at a concentration
above the North Carolina groundwater standard. Manganese was also detected above the
groundwater standard, however, the detected concentration is potentially associated with
background levels. H&H recommends that groundwater impacts be addressed through a
groundwater use restriction as part of the Brownfields.

• The results of the vapor intrusion assessment did not indicate compound concentrations in
indoor air above conservative IASLs. Indoor air samples were conducted under worst case
conditions without operation of HVAC systems. H&H does not believe that mitigation or
other controls are warranted for use of the existing building for commercial/industrial uses.
Because of the levels of compounds detected in soil vapor below the existing site building,
should additional buildings be constructed at the site, H&H recommends that an evaluation
of the potential for vapor intrusion be conducted in the area where the building is to be
constructed or that a vapor mitigation system be incorporated into the building design.
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Table 1
Summary of Groundwater Analytical Data
Kolortex Site
Charlotte, North Carolina
H&H Job No. CRH-001
(Page 1 of 5)
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Table 1 (Page 1 of 5)
Hart & Hickman, PC
SVOCs (8270D) (µg/l)Metals (6020A) (mg/L)
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TMW-1 10/14/2013 51 0.83 0.72 0.82 All ND 0.085
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48.4 315*164 334 ----
Notes:
DENR = North Carolina Department of Environment and Natural Resources
IHSB = Inactive Hazardous Sites Branch
Only compounds detected above laboratory reporting limits shown in table.
* = Screening level for trans-1,2-dichloroethene used as a surrogate for cis-1,2-dichloroethene
Bold indicates concentration exceeds NC groundwater standard
Underline indicates concentration exceeds IHSB Non-Residential Vapor Intrusion Screening Level
VOCs = Volatile Organic Compounds; SVOCs = Semi-Volatile Organic Compounds
ND = Not Detected
DENR IHSB Non-Residential Vapor Intrusion Screening Level
VOCs (8260B) (µg/L)
NC Groundwater Standard
Table 2
Summary of Sub-Slab Soil Vapor Analytical Data
Kolortex Site
Charlotte, North Carolina
H&H Job No. CRH-001 (Page 2 of 5)
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Table 2 (Page 2 of 5)
Hart & Hickman, PC
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SVP-1 Northeastern Warehouse 10/10/13 TO-15 5,100 0.44J <0.40 <0.40 <0.40 83 0.76 <0.67 8.2J 4.4 <0.63 <0.49 0.26J
SVP-2 Southeastern Warehouse 10/10/13 TO-15 110,000 35 <0.54 <0.53 <0.53 98 0.78 <0.89 7.5J 12.0 <0.84 1.3 0.39J
SVP-3 South-Central Warehouse 10/10/13 TO-15 16 <0.54 <0.40 <0.40 <0.40 160 0.61 <0.67 11J 6.3 <0.63 0.16J 1.1
SVP-4 Northwestern Warehouse 10/10/13 TO-15 4,000 23 <0.40 1.7 1.6 56 0.7 <0.67 4.8J 6.3 <0.63 1.9 0.35J
SVP-5 Office 10/11/13 TO-15 0.72 <0.54 0.20J <0.40 <0.40 140 1.1 1.3 14 3.6 <0.63 5.2 0.62
SVP-6 Office 10/11/13 TO-15 0.99 <0.54 <0.40 <0.40 <0.40 390 0.48 0.48J 24 5.0 0.24J 2.3 <0.41
3,500 175 7,670 5,260**5,260 2,720,000 1,570 331 438,000 61,300 2,040 533 7,880
Notes
Bold indicates concentration exceeds DENR IHSB Non-Residential Soil Gas Screening Level (October 2013 table)
Only compounds detected in at least one sample shown
NS = Not Specified
µg/m3 = micrograms per cubic meter
LICR = Lifetime Incremental Cancer Risk
HI = Non-carcinogenic hazard index
** = Screening levels for trans-1,2-DCE used as a surrogate for screening levels for cis-1,2-DCE
*** = Screening level for 1,3,5-Trimethylbenzene used as a surrogate for screening level for 1,2,4-Trimethylbenzene
J = Value indicates compound detected but below the reporting limit; result is an estimated concentration
µg/m3
IHSB Non-Residential Soil Gas Screening Level (LICR = 1 x 10-5 and HI = 0.2)
Sa
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Table 2
Summary of Sub-Slab Soil Vapor Analytical Data
Kolortex Site
Charlotte, North Carolina
H&H Job No. CRH-001 (Page 3 of 5)
S:\AAA-Master Projects\carolina realty holdings (Horsesheo Lane)- CRH\October 2013 Assessment\Tables\Data Tables.xlsData Tables.xls
Table 2 (Page 3 of 5)
Hart & Hickman, PC
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SVP-1 Northeastern Warehouse 10/10/13 TO-15 <0.60 <0.85 0.18J 11 20 0.32J 0.16J 0.31J 1.4J 0.88 6.7J <0.36 1.2J 0.47
SVP-2 Southeastern Warehouse 10/10/13 TO-15 <0.80 <1.1 <0.80 30 40 0.34J 0.25J 1.8J 1.8J 1.3 15 <0.48 1.9J 0.68
SVP-3 South-Central Warehouse 10/10/13 TO-15 <0.60 <0.85 <0.60 9.9 24 0.52 0.27J <0.41 1.2J 0.84 28 0.17J 1.5J 0.61
SVP-4 Northwestern Warehouse 10/10/13 TO-15 <0.60 <0.85 <0.60 11 21 0.60 0.57 5.3 10J <0.41 10 <0.36 1.1J 0.8
SVP-5 Office 10/11/13 TO-15 0.17J 0.49J 0.25J 75 38 0.39 0.19 <0.41 1.2 2.2 12 <0,36 1.4 1.2
SVP-6 Office 10/11/13 TO-15 <0.60 <0.85 0.22J 30 130 0.22J 0.13J 0.39J 1.1J 2.00 53 <0.36 1.4J 2.6
17,500 454 1,110 8,760 NS 4,910 NS NS 61,300 2,630 NS 47,200 52,600 263,000
Notes
Bold indicates concentration exceeds DENR IHSB Non-Residential Soil Gas Screening Level (October 2013 table)
Only compounds detected in at least one sample shown
NS = Not Specified
µg/m3 = micrograms per cubic meter
LICR = Lifetime Incremental Cancer Risk
HI = Non-carcinogenic hazard index
** = Screening levels for trans-1,2-DCE used as a surrogate for screening levels for cis-1,2-DCE
*** = Screening level for 1,3,5-Trimethylbenzene used as a surrogate for screening level for 1,2,4-Trimethylbenzene
J = Value indicates compound detected but below the reporting limit; result is an estimated concentration
Sa
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IHSB Non-Residential Soil Gas Screening Level (LICR = 1 x 10-5 and HI = 0.2)
Table 2
Summary of Sub-Slab Soil Vapor Analytical Data
Kolortex Site
Charlotte, North Carolina
H&H Job No. CRH-001 (Page 4 of 5)
S:\AAA-Master Projects\carolina realty holdings (Horsesheo Lane)- CRH\October 2013 Assessment\Tables\Data Tables.xlsData Tables.xls
Table 2 (Page 4 of 5)
Hart & Hickman, PC
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SVP-1 Northeastern Warehouse 10/10/13 TO-15 0.5J 3.0J 0.13J 0.27J 1.2 1.7 <0.55 2.0 0.75J 0.51 0.18J 1.0 0.42J
SVP-2 Southeastern Warehouse 10/10/13 TO-15 0.62J 3.0J 0.32J 0.28J 1.3 0.89J 19 1.9 0.86J 1.3 0.28J 1.4 0.93
SVP-3 South-Central Warehouse 10/10/13 TO-15 0.59 <6.9 0.17J 0.22J 2.7 0.37J <0.55 1.4 0.64 0.93 0.27J 1.9 0.95
SVP-4 Northwestern Warehouse 10/10/13 TO-15 0.52 <6.9 0.36J <0.29 0.74 7.4 0.41J 1.2 0.48J 3.4 1.1 2.5 1.3
SVP-5 Office 10/11/13 TO-15 0.72 9.0 0.14J 0.54 2.2 0.36J <0.55 0.42J 0.49J 0.63 0.22J 1.2 0.69
SVP-6 Office 10/11/13 TO-15 0.39J 2.7J 0.11J 0.17J 1.2 <0.74 <0.55 1.3 0.69J 0.46J 0.21J 0.76J 0.45
263 NS 87,600 175,000 438,000 175 438,000 61,300 2,630,000 613 613***8,760 8,760
Notes
Bold indicates concentration exceeds DENR IHSB Non-Residential Soil Gas Screening Level (October 2013 table)
Only compounds detected in at least one sample shown
NS = Not Specified
µg/m3 = micrograms per cubic meter
LICR = Lifetime Incremental Cancer Risk
HI = Non-carcinogenic hazard index
** = Screening levels for trans-1,2-DCE used as a surrogate for screening levels for cis-1,2-DCE
*** = Screening level for 1,3,5-Trimethylbenzene used as a surrogate for screening level for 1,2,4-Trimethylbenzene
J = Value indicates compound detected but below the reporting limit; result is an estimated concentration
µg/m3Sa
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Table 3
Summary of Indoor Air Analytical Data
Kolortex Site
Charlotte, North Carolina
H&H Job No. CRH-001
(Page 5 of 5)
S:\AAA-Master Projects\carolina realty holdings (Horsesheo Lane)- CRH\October 2013 Assessment\Tables\Data Tables.xlsData Tables.xls
Table 3 (Page 5 of 5)
Hart & Hickman, PC
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IAS-1 Northeast Warehouse Area 12/20/13 TO-15 2.2 <1.1 <0.79 <0.79 <0.51
IAS-2 South-Central Warehouse Area 12/20/13 TO-15 4.1 <1.1 <0.79 <0.79 <0.51
IAS-3 Northwest Warehouse Area 12/20/13 TO-15 3.0 <1.1 <0.79 <0.79 <0.51
BAS-1 Outdoor Background 12/20/13 TO-15 <1.4 <1.1 <0.79 <0.79 <0.51
35 1.75 52.6*52.6 2.79
Notes
µg/m3 = micrograms per cubic meter
LICR = Lifetime Incremental Cancer Risk
HI = Non-carcinogenic hazard index
Screening Levels from DENR IHSB Non-Residential Indoor Air and Crawlspace Screening Level (October 2013 table)
* = Screening level for trans-1,2-dichloroethene used as a surrogate for cis-1,2-dichloroethene
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TITLE
PROJECT
SITE LOCATION MAP
2900 HORSESHOE LANE
CHARLOTTE, NORTH CAROLINA
DATE:
JOB NO:
REVISION NO:
FIGURE NO:
1-20-14 0
1CRH-001
0 2000 4000
APPROXIMATE
SCALE IN FEETN
U.S.G.S. QUADRANGLE MAP
QUADRANGLE
7.5 MINUTE SERIES (TOPOGRAPHIC)
Charlotte West, NC 1993
SITE
2923 S. Tryon Street, Suite 100Charlotte, NC 28203704.586.0007(p) 704.586.0373(f)

Appendix A

Subsurface Investigation Permit and Boring Logs/Well Construction Diagrams
S:\AAA-Master Projects\carolina realty holdings (Horsesheo Lane)- CRH\October 2013 Assessment\Report\Kolortex GWM & Vapor Assessment Sampling
Rpt_RWM.docx
SIP Form – revised 2/15/11
Mecklenburg County Health Department Groundwater & Wastewater Services 700 N. Tryon St., Suite 211 Charlotte, NC 28202
Phone: [phone] Fax: [phone] http://groundwater.charmeck.org
Permit Issuance Date: _______________
Permit Number: ____________________ 
SUBSURFACE INVESTIGATION PERMIT
I. Well Owner Information
Name: ___________________________________
Attn: _____________________________________
Phone #: _____________________
Address 1: ________________________________
Address 2: ________________________________
City: __________________________ State: _______ Zip: _____________
II. Agent Information (if applicable)

Name: ___________________________________
Attn: _____________________________________
Phone #: _____________________
Address 1: ________________________________
Address 2: ________________________________
City: __________________________ State: _______ Zip: _____________
III. Site Information

Site Name; ________________________________
Parcel ID Number: _____________________
Address: ________________________________
City: __________________________ State: _______ Zip: _____________

General Conditions of This Permit:
• This permit shall be VALID for a period not to exceed twelve (12) months from the date of issuance.
• This permit is VALID for the site specified aboveDQGmust be on-site during the course of the investigation
and made available to a Department representative upon request.
• A North Carolina Certified Well Contrator must perform any well contractor activities associated with this permit.
• All wells shall be constructed and abandoned to the standards of Chapter VI, Section V and Section VIof the Mecklenburg County Groundwater Well Regulations.
• All temporary wells, including those installed using Direct Push Technology, must be abandoned
to the standards of Chapter VI, Section VI of the Mecklenburg County Groundwater Well Regulations.
• Registration information for all wells must be submitted to the Department within thirty (30) days of well completion. If water samples are collected, it is recommended that the well NOT be registered until the
analytical results are received.

Owner
10/17/2013
70002105
Carolina Realty Holdings, LLC
Brian Harnett
704 358 3311
2900 Horseshoe Lane
Charlotte NC 28208
Hart & Hickman, PC
Ralph McGee
704 618 1316
2923 South Tryon Street
Charlotte NC 28203
Kolortex
14311107
2900 HORSESHOE LN
CHARLOTTE NC 28208
0.3
0.1
0
0
0
0.8
0.7
0.7
0.9
1.1
1.8
1.2
2.4
2.1
2
1.8
1.8
1.8
2
Grass and organic topsoil
Slightly moist, slightly firm, orange brown sandy SILT
Slightly moist, firm, reddish brown clayey SILT
Slightly moist, slightly firm, tan brown Silt with minor amounts of fineto medium grain sand
Slightly moist, firm, tan brown SILT with grey blue laminations
Slightly moist, very hard, grey blue weathered rock fragments withtan brown SILT
Moist, firm, blue grey brown SILT with clay
Very moist, very firm, blue grey brown silty SAPROLITE
DPT refusal on weathered Diorite at 42' BGS
Bottom of borehole at 42.0 feet.
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1" PVC riser
Bentoniteseal
Sand filterpack
1"Pre-packedslottedscreen
DRAWN BY:RWM
BORING COMPLETED:10/14/13
DRILLING CONTRACTOR:Probe Technology Remarks:
DRILL RIG/ METHOD:7822DT / DPT
SAMPLING METHOD:DPT Sleeves Hand auger to 5' bgs
BORING STARTED:10/14/13
LOGGED BY:RWM
TOTAL DEPTH: 42 ft.
TOP OF CASING ELEV:NA
DEPTH TO WATER:28.21
DE
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H
(f
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DE
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BORING DIAGRAM
Sheet 1 of 1
BORING NUMBER TMW-1
PROJECT:Kolortex Site
JOB NUMBER:CRH-001
LOCATION:Charlotte, North Carolina
BO
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2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
3334 Hillsborough Street
Raleigh, North Carolina 27607
919-847-4241(p) 919-847-4261(f)
0
5
10
15
20
25
30
35
40
0
5
10
15
20
25
30
35
40
1.7
1.7
1.6
1
0.5
0.7
0.3
0.7
1.1
Asphalt
ABC gravel
Slightly moist, firm, reddish brown clayey SILT
Slightly moist, slightly firm, blue grey brown Silt with minor amountsof fine to medium grain sand
Slightly moist, very firm, blue grey brown SILT with clay
Moist, very firm, grey black silty SAPROLITE
DPT refusal on weathered Diorite at 22' BGS
Bottom of borehole at 22.0 feet.
0
0
0
0
0
0
0
0
0
DRAWN BY:RWM
BORING COMPLETED:10/14/13
DRILLING CONTRACTOR:Probe Technology Remarks:
DRILL RIG/ METHOD:7822DT / DPT
SAMPLING METHOD:DPT Sleeves Hand auger to 5' bgs; Refusal on PWRat 22' bgs prior to encountering thewater table
BORING STARTED:10/14/13
LOGGED BY:RWM
TOTAL DEPTH: 22 ft.
TOP OF CASING ELEV:NA
DEPTH TO WATER:NA
DE
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H
(f
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NU
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B
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R
BORING DIAGRAM
Sheet 1 of 1
BORING NUMBER TMW-2A
PROJECT:Kolortex Site
JOB NUMBER:CRH-001
LOCATION:Charlotte, North Carolina
BO
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L
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2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
3334 Hillsborough Street
Raleigh, North Carolina 27607
919-847-4241(p) 919-847-4261(f)
0
5
10
15
20
0
5
10
15
20
0.8
0
0
0
0
0
0
0
0
0
0
Grass and organic topsoil
Slightly moist, firm, reddish brown clayey SILT
Slightly moist, slightly firm, tan brown Silt with minor amounts of fineto medium grain sand
Moist, firm, blue grey brown SILT with clay
Moist, very firm, grey black silty SAPROLITE
DPT refusal on weathered Diorite at 25' BGS
Bottom of borehole at 25.0 feet.
0
0
0
0
0
0
0
0
0
0
0
DRAWN BY:RWM
BORING COMPLETED:10/14/13
DRILLING CONTRACTOR:Probe Technology Remarks:
DRILL RIG/ METHOD:7822DT / DPT
SAMPLING METHOD:DPT Sleeves Hand auger to 5' bgs; Refusal on PWRat 25' bgs prior to encountering thewater table
BORING STARTED:10/14/13
LOGGED BY:RWM
TOTAL DEPTH: 25 ft.
TOP OF CASING ELEV:NA
DEPTH TO WATER:NA
DE
P
T
H
(f
t
)
DE
P
T
H
(f
t
)
LI
T
H
O
L
O
G
Y
RE
C
O
V
E
R
Y

(
%
)
SA
M
P
.
MATERIAL DESCRIPTIONOV
A

(
p
p
m
)
BK
G
.
SA
M
P
L
E

T
Y
P
E
NU
M
B
E
R
BORING DIAGRAM
Sheet 1 of 1
BORING NUMBER TMW-2B
PROJECT:Kolortex Site
JOB NUMBER:CRH-001
LOCATION:Charlotte, North Carolina
BO
R
I
N
G

L
O
G

-

H
A
R
T

H
I
C
K
M
A
N
.
G
D
T

-

1
0
/
1
6
/
1
3

1
4
:
4
9

-

S
:
\
A
A
A
-
M
A
S
T
E
R

G
I
N
T

P
R
O
J
E
C
T
S
\
C
R
H
-
0
0
1

K
O
L
O
R
T
E
X
.
G
P
J
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
3334 Hillsborough Street
Raleigh, North Carolina 27607
919-847-4241(p) 919-847-4261(f)
0
5
10
15
20
25
0
5
10
15
20
25
0
0
0
0
0
0
0
0
0
0
0
Grass and organic topsoil
Slightly moist, firm, reddish brown clayey SILT
Slightly moist, slightly firm, tan brown Silt with minor amounts of fineto medium grain sand
Moist, firm, blue grey brown SILT with clay
Moist, very firm, grey black silty SAPROLITE
DPT refusal on weathered Diorite at 25' BGS
Bottom of borehole at 25.0 feet.
0
0
0
0
0
0
0
0
0
0
0
Bentoniteseal
1" PVC riser
Sand filterpack
Pre-pack 1"PVC slottedscreen
DRAWN BY:RWM
BORING COMPLETED:10/14/13
DRILLING CONTRACTOR:Probe Technology Remarks:
DRILL RIG/ METHOD:7822DT / DPT
SAMPLING METHOD:DPT Sleeves Hand auger to 5' bgs; Refusal on PWRat 25' bgs prior to encountering thewater table
BORING STARTED:10/14/13
LOGGED BY:RWM
TOTAL DEPTH: 25 ft.
TOP OF CASING ELEV:NA
DEPTH TO WATER:DRY
DE
P
T
H
(f
t
)
DE
P
T
H
(f
t
)
LI
T
H
O
L
O
G
Y
RE
C
O
V
E
R
Y

(
%
)
SA
M
P
.
MATERIAL DESCRIPTIONOV
A

(
p
p
m
)
BK
G
.
SA
M
P
L
E

T
Y
P
E
NU
M
B
E
R
BORING DIAGRAM
Sheet 1 of 1
BORING NUMBER TMW-2C
PROJECT:Kolortex Site
JOB NUMBER:CRH-001
LOCATION:Charlotte, North Carolina
BO
R
I
N
G

L
O
G

-

H
A
R
T

H
I
C
K
M
A
N
.
G
D
T

-

1
0
/
1
6
/
1
3

1
4
:
4
9

-

S
:
\
A
A
A
-
M
A
S
T
E
R

G
I
N
T

P
R
O
J
E
C
T
S
\
C
R
H
-
0
0
1

K
O
L
O
R
T
E
X
.
G
P
J
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
3334 Hillsborough Street
Raleigh, North Carolina 27607
919-847-4241(p) 919-847-4261(f)
0
5
10
15
20
25
0
5
10
15
20
25
1
1.1
1.3
1.1
Asphalt
ABC gravel
Slightly moist, firm, reddish brown clayey SILT
Slightly moist, slightly firm, blue grey brown Silt with minor amountsof fine to medium grain sand
Slightly moist, very firm, grey black silty SAPROLITE
DPT refusal on weathered Diorite at 9' BGS
Bottom of borehole at 9.0 feet.
0
0
0
0
DRAWN BY:RWM
BORING COMPLETED:10/14/13
DRILLING CONTRACTOR:Probe Technology Remarks:
DRILL RIG/ METHOD:7822DT / DPT
SAMPLING METHOD:DPT Sleeves Hand auger to 5' bgs; Refusal on PWRat 9' bgs prior to encountering the watertable
BORING STARTED:10/14/13
LOGGED BY:RWM
TOTAL DEPTH: 9 ft.
TOP OF CASING ELEV:NA
DEPTH TO WATER:NA
DE
P
T
H
(f
t
)
DE
P
T
H
(f
t
)
LI
T
H
O
L
O
G
Y
RE
C
O
V
E
R
Y

(
%
)
SA
M
P
.
MATERIAL DESCRIPTIONOV
A

(
p
p
m
)
BK
G
.
SA
M
P
L
E

T
Y
P
E
NU
M
B
E
R
BORING DIAGRAM
Sheet 1 of 1
BORING NUMBER TMW-2D
PROJECT:Kolortex Site
JOB NUMBER:CRH-001
LOCATION:Charlotte, North Carolina
BO
R
I
N
G

L
O
G

-

H
A
R
T

H
I
C
K
M
A
N
.
G
D
T

-

1
0
/
1
6
/
1
3

1
4
:
4
9

-

S
:
\
A
A
A
-
M
A
S
T
E
R

G
I
N
T

P
R
O
J
E
C
T
S
\
C
R
H
-
0
0
1

K
O
L
O
R
T
E
X
.
G
P
J
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
3334 Hillsborough Street
Raleigh, North Carolina 27607
919-847-4241(p) 919-847-4261(f)
0.0
2.5
5.0
7.5
10.0
0.0
2.5
5.0
7.5
10.0

Appendix B

Groundwater Sampling Form
S:\AAA-Master Projects\carolina realty holdings (Horsesheo Lane)- CRH\October 2013 Assessment\Report\Kolortex GWM & Vapor Assessment Sampling
Rpt_RWM.docx

Appendix C

Indoor Air Sampling Field Measurement Data

S:\AAA-Master Projects\carolina realty holdings (Horsesheo Lane)- CRH\October 2013 Assessment\Tables\IAS Monitoring Data Table.xlsx
Time
Temperature
oF
Differential
Pressure
(in Water)
Temperature
oF
Barometric
Pressure
(in Hg)Wind Direction
Wind Speed
(mph)
8:47 NA NA 47 30.24 →SE 5
11:47 NA NA 56 30.25 ↘SW 8
14:02 NA NA 61 30.17 →SW 12
16:47 NA NA 59 30.17 →SW 7
8:31 45 0.001
23:26 52 0.003
13:53 55 0.007
16:33 56 0.009
8:37 45 0.001
11:28 52 0.003
13:56 55 0.007
16:39 56 0.009
8:23 45 0.001
11:47 52 0.003
14:02 55 0.007
16:47 56 0.009
Notes:
The symbol ↘ distinguishes barometric pressure as falling.
Positive indoor air differential pressure indicates that the pressure outside the building was lower than the pressure indoors.
NA = Not Applicable
Indoor Outdoor
Exterior
Background BAS-1
Indoor/Outdoor Air Field Measurement DataKolortex Site
Charlotte, North Carolina
H&H Job No. CRH-001
Unit Sample
IAS-2
IAS-3
IAS-1
Northwestern
Warehouse Area
Northeastern
Warehouse Area
South-Central
Warehouse Area

Appendix D

Laboratory Analytical Reports

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