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BROWNFIELDS ASSESSMENT
LETTER REPORT
One Hour Martinizing Brownfields Site
NCBP #17042-13-060
911 E. Morehead Street
Charlotte, Mecklenburg County, North Carolina
February 20, 2019
Terracon Project No. 71187043
Prepared for:
GG-Morehead, LLC
Charlotte, North Carolina
Prepared by:
Terracon Consultants, Inc.
Charlotte, North Carolina
TABLE OF CONTENTS
ii
1.0 SITE DESCRIPTION ....................................................................................................... 1
1.1 General Site Description and History ................................................................... 1
1.2 Off-Site Environmental Concerns ......................................................................... 2
2.0 SCOPE OF SERVICES ................................................................................................... 2
2.1 Reliance ............................................................................................................... 2
3.0 FIELD INVESTIGATION METHODS ............................................................................... 3
3.1 Soil Vapor Sample Point Installation .................................................................... 3
3.2 Soil Vapor Sampling ............................................................................................ 3
4.0 RESULTS ....................................................................................................................... 4
4.1 Soil Vapor Sample Results .................................................................................. 4
5.0 CONCLUSIONS .............................................................................................................. 5
Tables
Table 1 – Soil Vapor Sample Analytical Results (July 2018)
Table 2 – Soil Vapor Sample Analytical Results (January 2019)
Figures
Figure 1 – Site Location Map
Figure 2 – Site Diagram and Sample Locations Map
Figure 3 – Soil Vapor Sample Analytical Results Map (January 2019)
Appendices
APPENDIX A – FIELD FORMS
Soil Vapor Sample Collection Records
APPENDIX B – LABORATORY ANALYTICAL REPORTS
Soil Vapor Sample Analytical Report – Contest Analytical Laboratory
APPENDIX C – BROWNFIELDS RISK CALCULATORS
Brownfields Soil Vapor Concentration to Indoor Air Concentration Risk Calculator
(Residential and Non-Residential)
Responsive ■ Resourceful ■ Reliable 1
BROWNFIELDS ASSESSMENT LETTER REPORT
ONE HOUR MARTINIZING BROWNFIELDS SITE
NCBP #17042-13-060
911 E. MOREHEAD STREET
CHARLOTTE, NORTH CAROLINA
Terracon Project No. 71187043
February 20, 2019
1.0 SITE DESCRIPTION
1.1 General Site Description and History
The One Hour Martinizing Brownfields site is located at 911 E. Morehead Street in Charlotte,
North Carolina. The site consists of a 1.623-acre parcel improved with a two-story (ground floor
and basement) commercial building, totaling 47,498 square feet (ft2). Currently, the building is
occupied by multiple tenants including a fitness gym, a restaurant, an event planning business, a
wine shop, and a nail salon. One Hour Martinizing (a dry-cleaning operation) reportedly occupied
a portion of the site as a tenant from approximately 1964 to 1969. Exterior portions of the site
consist mostly of asphalt-paved vehicle access and parking areas with limited landscaped areas.
The property is identified in Mecklenburg County tax records as Parcel No. 12520104. The site
was accepted into the North Carolina Brownfields Program in December 2013 with GG-
Morehead, LLC identified as the prospective developer (PD). The site location is shown on Figure
1.
Surrounding land use consists of commercial properties to the north, east and south. The site is
bound to the west by E. Morehead Street with residential properties and a pick-up/drop-off dry
cleaning facility located across E. Morehead Street. The site generally slopes downward to the
southeast.
In July 2018, two sub-slab soil vapor samples (SV-01 and SV-02) and a blind duplicate (DUP-
20180717) were collected at the site as part of the Brownfields Assessment activities. Sample
SV-01 was located in the northern portion of the on-site building and SV-02 was located in the
southern portion of the on-site building. Laboratory analytical results for the soil vapor samples
identified tetrachloroethylene (1,100 micrograms per cubic meter [µg/m3]) in sample SV-02 above
the established Department of Waste Management (DMW) Residential Sub-Slab and Exterior
Soil Gas Screening Level (SGSL) of 280 µg/m3. Naphthalene was detected in the three soil vapor
samples at concentrations that exceeded its established Residential SGSL (21 µg/m3). Various
other volatile constituents were detected in the samples below their established Residential
SGSLs. Soil vapor sample results were also evaluated using the NC Brownfields Program Sub-
Slab or Exterior Soil Gas Concentration to Indoor Air Concentration (SGC-IAC) Calculator, version
3.45. Cumulative risk evaluations using the SGC-IAC calculator determined that the non-
carcinogenic hazard quotient for sample SV-02 exceeded the acceptable threshold limit under a
Brownfields Assessment Report
One Hour Martinizing Brownfields Site ■ Charlotte, NC
February 20, 2019 ■ Terracon Project No. 71187043
Responsive ■ Resourceful ■ Reliable 2
Residential scenario. Soil vapor analytical results from the July 2018 sampling event are provided
as Table 1.
1.2 Off-Site Environmental Concerns
The former Domestic Laundry facility, located generally north and up-gradient of the One Hour
Martinizing Brownfields Site, is maintained within the North Carolina Dry-Cleaning Solvent
Cleanup Act (DSCA) Program, and is identified as Site No. DC600012. Various soil, groundwater,
and soil gas studies associated with the former Domestic Laundry facility have documented
impacts by volatile organic compounds (VOCs) to groundwater and soil gas media at the former
facility and surrounding properties.
2.0 SCOPE OF SERVICES
Terracon conducted the Brownfields Assessment activities in general accordance with the
Brownfields Assessment Work Plan, revised June 14, 2019, approved by the NC Brownfields
Program Project Manager on June 20, 2018 and an email requesting additional sampling, dated
August 27, 2018.
The scope of services conducted at the facility included:
▪ Preparation of a Health and Safety Plan and
▪ Sample two sub-slab soil vapor sample points at locations inside the building near the
northern and southern corners of the building.
Sample locations are shown on Figure 2 and field methods are discussed in Section 3 of this
report.
2.1 Reliance
This report has been prepared for the exclusive use of GG-Morehead, LLC, its affiliates, and their
lenders providing financing for the site, and the North Carolina Brownfields Program. Any
authorization for use or reliance by another party (except a governmental entity having jurisdiction
over the site) is prohibited without the expressed written authorization of GG-Morehead, LLC and
Terracon. Any unauthorized distribution or reuse is at the sole risk of GG-Morehead, LLC.
Reliance by authorized parties will be subject to the terms, conditions, and limitations stated in
the proposal, report, and Terracon’s Agreement for Services. The limitation of liability defined in
the terms and conditions is the aggregate limit of Terracon’s liability to GG-Morehead, LLC and
all relying parties unless otherwise agreed in writing.
Brownfields Assessment Report
One Hour Martinizing Brownfields Site ■ Charlotte, NC
February 20, 2019 ■ Terracon Project No. 71187043
Responsive ■ Resourceful ■ Reliable 3
3.0 FIELD INVESTIGATION METHODS
Terracon conducted the field work in accordance with a health and safety plan developed
specifically for this project. Work was performed using United States Environmental Protection
Agency (USEPA) Level D work attire consisting of safety glasses, protective gloves, and
protective boots.
3.1 Soil Vapor Sample Point Installation
The Brownfields Assessment Work Plan for the site included the collection of two sub-slab soil
vapor samples (SV-01A and SV-02A) and one blind duplicate sample (DUP-20190115) collected
at the location of SV-02A, in the southern corner of the on-site building. The locations of the sub-
slab soil vapor samples are shown on Figure 2. Technical approaches and methods used for the
soil vapor investigation are in general accordance with the Interstate Technical and Regulatory
Council’s Vapor Intrusion: A Practical Guideline (2007) and Vapor Intrusion Pathway:
Investigative Approaches for Typical Scenarios (2007), as well as the NCDEQ Division of Waste
Management (DWM) Vapor Intrusion Guidance (March 2018).
In July 2018, two sub-slab soil vapor (SV) sampling points were installed within storage and
walkway areas within the basement of the on-site building (Figure 2). A 4-inch diameter concrete
core was initially removed from the basement floor slab to recess the soil vapor point locations
below the concrete surface without extending into the soils beneath the slab. Each temporary SV
sampling point was installed by drilling a 5/8-inch diameter hole through the remaining thickness
of the floor slab to a depth of approximately 1 to 2 inches into the underlying soils. The thickness
of the concrete slab in the northern portion of the building was approximately 6 inches at sample
point SV-01 while the slab was approximately 4 inches thick near the southern corner of the
building at sample point SV-02. The SV sampling points were completed with a Vapor Pin™
assembly consisting of a brass barb fitting with a silicone sleeve to seal the 5/8-inch diameter
hole. A silicone cap was placed over the vapor pin to keep it sealed and the recessed points were
covered with a 4in. cap to protect the integrity of the silicone cap.
3.2 Soil Vapor Sampling
Terracon mobilized to the site on January 15, 2019 to collect the two sub-slab soil vapor samples
and a blind duplicate sample. In order to test the integrity of the sampling point seal, both a shut-
in test and a helium tracer test were conducted at each sample point. A MGD-2000 helium
detector was used to verify the presence and concentration of tracer gas.
The protocol for using a tracer gas is to enclose the sample manifold, tubing and ground interface
with a shroud and enrich the shroud atmosphere with helium. Prior to sample collection, at least
three volumes of the vapor point annulus and attached Teflon® lined tubing and sample train were
purged using a vacuum canister. Purge samples were then screened for helium to assess the
Brownfields Assessment Report
One Hour Martinizing Brownfields Site ■ Charlotte, NC
February 20, 2019 ■ Terracon Project No. 71187043
Responsive ■ Resourceful ■ Reliable 4
presence of leaks in the seal and fittings and with a PID to assess for the presence of VOCs.
Sample collection was started if the tracer testing indicated the helium concentration in the vapor
point was less than 10 percent of the helium concentration in the shroud, indicating an
appropriately sealed vapor point annulus.
Samples were collected with 1.0-liter Summa® canisters equipped with 170 ml/min flow controllers
for analysis of VOCs per EPA Method TO-15. Neither of the two SV points exhibited leakage
during field leak testing. A blind duplicate sample was collected at sample point SV-02A. The
vacuum pressure of the sample canisters was monitored and recorded at regular intervals
throughout the sampling period. Field sample collection records for soil vapor samples are
provided in Appendix A. At both locations, the Vapor Pin™ assembly was not removed after
sampling, instead a silicone cap was placed over the vapor pin to keep it sealed for potential
future sampling events and to minimize potential disturbance of the pin.
Following completion of the field activities, the Summa® canisters (three samples including the
duplicate), along with chain-of-custody documentation, were shipped to Contest Analytical
Laboratory in East Longmeadow, Massachusetts for laboratory analysis of VOCs by United States
Environmental Protection Agency (EPA) Method TO-15 Low Level.
4.0 RESULTS
The laboratory analytical reports and chain-of-custody records are provided in Appendix B. The
following sections describe the sampling and analytical results.
4.1 Soil Vapor Sample Results
Soil vapor sample results are shown on Figure 3 and are summarized on Table 2. The laboratory
analytical reports are included in Appendix B.
No leaks were detected in the sample manifolds during the initial dead-head or shut-in tests. After
purging, the purge tubing was screened for helium and VOCs. VOCs were not detected within the
purge tubing for the soil vapor samples above ambient air PID readings. During purging, helium
was not detected in the sample points. The lack of helium in the sample train, sample points and
manifold indicate leaks were not detected and supports the sampling procedures as providing
valid data. A level 2 QA/QC data package is provided with the soil vapor laboratory results in
Appendix B.
Laboratory analytical results for the soil vapor samples were compared to the DWM Sub-Slab and
Exterior Soil Gas Screening Levels (SGSL) for Residential and Non-Residential exposure
scenarios, updated February 2018. Tetrachloroethylene (780 µg/m3 and 830 µg/m3) was detected
above its Residential SGSL of 280 µg/m3 in samples SV-02A and DUP-20190115, collected near
the southern corner of the building. Naphthalene was detected in samples SV-01A, SV-02A and
Brownfields Assessment Report
One Hour Martinizing Brownfields Site ■ Charlotte, NC
February 20, 2019 ■ Terracon Project No. 71187043
Responsive ■ Resourceful ■ Reliable 5
DUP-20190115 at concentrations that also exceed its Residential SGSL (21 µg/m3). No other
constituents were detected above the Residential SGSLs. None of the detected constituents
exceeded the Non-Residential SGSLs. The following compounds were present in the soil vapor
above laboratory method detection limits.
▪ Acetone (3 samples), MEK (3 samples), Freon 12 [dichlorodifluoromethane] (2 samples),
ethanol (1 sample), isopropanol (3 samples), 2-hexanone (1 sample), naphthalene (3
samples), tetrachloroethene (3 samples) and Freon 11 [trichlorofluoromethane] (3
samples).
Blind duplicate sample DUP-20190115 was collected at location SV-02A. The duplicate sample
results generally correlate with the primary sample (SV-02A) results. Soil vapor sample results
were also evaluated using the NC Brownfields Program SGC-IAC Calculator. Under a Residential
exposure scenario, the cumulative non-carcinogenic hazard quotient for all samples is below the
acceptable threshold limit. The risk calculators are included in Appendix C.
5.0 CONCLUSIONS
Based on the scope of services described in this report and subject to the limitations described
herein, Terracon provides the following conclusions.
Soil Vapor
▪ Soil vapor sample SV-02A and DUP-20190115 collected from the southern portion of the
building contained tetrachloroethene above its Residential SGSL. Naphthalene was
detected in both sub-slab vapor samples including the duplicate sample at concentrations
above its Residential SGSL.
▪ Soil vapor sample results did not identify exceedances of Non-Residential SGSLs.
▪ Under a Residential exposure scenario, the cumulative calculated carcinogenic risk and
the non-carcinogenic hazard quotient (Brownfields Program SGC-IAC calculator) did not
exceed the acceptable threshold limit for each sample during the January 2019 sampling
event.
▪ During the July 2018 sampling event, cumulative risk evaluations using the SGC-IAC
calculator determined that the non-carcinogenic hazard quotient for the sample (SV-02)
located in the southern portion of the on-site building exceeded the acceptable threshold
limit under a Residential scenario.
▪ Based on the sub-slab soil vapor analytical results from the July 2018 and January 2019
sampling events, vapor mitigation is not necessary the current occupation of the site or for
redevelopment under a Non-Residential scenario.
▪ Terracon recommends abandoning the Vapor Pins following concurrence from the
Brownfields Program.
TABLES
Table 1
Soil Vapor Sample Analytical Results (July 2018)
One Hour Martinizing Brownfields Site
911 E. Morhead Street
Charlotte, Mecklenburg County, NC
Terracon Project No. 71187043
Sample ID:SV-01 SV-02 DUP-20180717
Sample Date:07/17/18 07/17/18 07/18/18
Type:Sub-slab Sub-slab Sub-slab
220,000 2,700,000 14J 29 18J
35,000 440,000 1.7J 2.1J 2.4J
NS NS 2 <0.62 2.5
Dichlorodifluoromethane (Freon 12) 700 8,800 <0.43 2.8 2.2
NS NS 8.3J 25 9.2J
Isopropanol 1,400 18,000 3.3J 3.8J <0.60
Methylene Chloride 4,200 53,000 0.93J <0.84 <0.84
Naphthalene 21 260 87 130 90
Styrene 7,000 88,000 <0.53 1.1 <0.53
Tetrachloroethene 280 3,500 12 1100 14
Toluene 35,000 440,000 <0.39 0.59J <0.39
Trichlorofluoromethane (Freon 11)NS NS 7.8 12 7.7
Vinyl Acetate 1,400 18,000 1.6J 1.5J 2.1J
Freon 13 NS NS <0.60 0.89J <0.60
o-Xylene 700 8,800 <0.54 0.57J <0.54
Notes:
Concentrations are reported in micrograms per cubic meter (μg/m3) unless otherwise noted.
Only detected compounds are shown.
Concentrations detected above the laboratory reporting limit are shown in bold.
NS - no standard
DWM - North Carolina Department of Environmental Quality, Division of Waste Management
SGSL - DWM Sub-slab and Exterior Soil Gas Screening Level, updated February 2018.
Concentrations highlighted in yellow exceed their respective residential SGSL.
1,3-Dichlorobenzene
Ethanol
Residential
Screening Levels
SGSL
Non-
Residential
Screening
Levels SGSL
Analyte
EPA Method TO-15
2-Butanone (Methyl Ethyl Ketone)
Acetone
Table 2
Soil Vapor Sample Analytical Results (January 2019)
One Hour Martinizing Brownfields Site
911 E. Morhead Street
Charlotte, Mecklenburg County, NC
Terracon Project No. 71187043
Sample ID:SV-01A SV-02A DUP-20190115
Sample Date:01/15/19 01/15/19 01/15/19
Type:Sub-slab Sub-slab Sub-slab
220,000 2,700,000 18J 8.6J 9.6J
35,000 440,000 5.3J 2.1J 2.8J
Dichlorodifluoromethane (Freon 12) 700 8,800 1.9 <0.43 2.6
NS NS 7.7J <6.7 <6.7
Isopropanol 1,400 18,000 3.7J 2.4J 1.6J
2-Hexanone 210 2,600 <0.48 2.3 <0.48
Naphthalene 21 260 21 37 33
Tetrachloroethene 280 3,500 1.4 780 830
Trichlorofluoromethane (Freon 11)NS NS 1.6J 4.4J 4.8
Notes:
Concentrations are reported in micrograms per cubic meter (μg/m3) unless otherwise noted.
Only detected compounds are shown.
Concentrations detected above the laboratory reporting limit are shown in bold.
NS - no standard
DWM - North Carolina Department of Environmental Quality, Division of Waste Management
SGSL - DWM Sub-slab and Exterior Soil Gas Screening Level, updated February 2018.
Concentrations highlighted in yellow exceed their respective residential SGSL.
Ethanol
Analyte
Residential
Screening Levels
SGSL
Non-
Residential
Screening
Levels SGSL
EPA Method TO-15
Acetone
2-Butanone (Methyl Ethyl Ketone)
FIGURES
SITE LOCATION MAP
One Hour Martinizing Brownfields
(NCBP # 17042-13-060)
911 E. Morehead Street
Charlotte, Mecklenburg County, NC
TOPOGRAPHIC MAP IMAGE COURTESY OF THE U.S. GEOLOGICAL SURVEY QUADRANGLES INCLUDE: CHARLOTTE EAST, NC (1/1/1988).
2701 Westport Rd
Charlotte, NC 28208-3608
71187043 Project Manager:
Drawn by:
Checked by:
Approved by:
HEH
CLC
CLC
1”=2,000’
71187043.1
Jan. 2019
Project No.
Scale:
File Name:
Date: 1
Figure HEH
APPROXIMATE
SITE BOUNDARY
71187043
Site Diagram and Sample Locations
One-Hour Martinizing Brownfields Site
(NCBP # 17042-13-060)
911 E. Morehead Street
Charlotte, Mecklenburg County, NC
2701 Westport Road
Charlotte, NC
71187043
HEH
CLC
CLC
N.T.S.
January 2019
Scale:
2
FigureProject Manager:
Drawn by:
Checked by:
Approved by:
Project No.
File Name:
Date:
HEH
denotes approximate site boundary
approximate sub-slab soil gas
sample location
SV-01A
LEGEND:
SV-02A/DUP-20190115
71187043
Soil Vapor Sample Analytical Results Map (January 2019)
One-Hour Martinizing Brownfields Site
(NCBP # 17042-13-060)
911 E. Morehead Street
Charlotte, Mecklenburg County, NC
2701 Westport Road
Charlotte, NC
71187043
HEH
CLC
CLC
N.T.S.
January 2019
Scale:
3
FigureProject Manager:
Drawn by:
Checked by:
Approved by:
Project No.
File Name:
Date:
HEH
denotes approximate site boundary
approximate sub-slab soil gas
sample location
SV-01A
LEGEND:
SV-02A/DUP-20190115
Notes:
-Concentrations highlighted in yellow exceed their
respective Residential SGSL.
APPENDIX A – FIELD FORMS, SOIL BORING LOGS, AND
RECEPTOR SURVEY
Soil Vapor Sample Collection Record
APPENDIX B – LABORATORY ANALYTICAL REPORTS
Soil Vapor Sample Analytical Report – Contest Analytical Laboratory
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APPENDIX C – BROWNFIELDS RISK CALCULATORS
Brownfields Soil Vapor Concentration to Indoor Air Concentration Risk Calculator
(Residential and Non-Residential)
DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
Version Date: February 2018
Basis: November 2017 EPA RSL Table
Site ID: SV-01A
Exposure Unit ID:
CAS #Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non-
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 18 0.54 -6.5E+03 1.7E-05
75-71-8 Dichlorodifluoromethane 1.9 0.057 -2.1E+01 5.5E-04
67-63-0 Isopropanol 3.7 0.111 -4.2E+01 5.3E-04
78-93-3 Methyl Ethyl Ketone (2-Butanone)5.3 0.159 -1.0E+03 3.0E-05
91-20-3 ~Naphthalene 21 0.63 8.3E-02 6.3E-01 7.6E-06 2.0E-01
127-18-4 Tetrachloroethylene 1.4 0.042 1.1E+01 8.3E+00 3.9E-09 1.0E-03
75-69-4 Trichlorofluoromethane 1.6 0.048 --
Cumulative:7.6E-06 2.0E-01
All concentrations are in ug/m3
Output Form 3B
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
Version Date: February 2018
Basis: November 2017 EPA RSL Table
Site ID: SV-02A
Exposure Unit ID:
CAS #Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non-
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 8.6 0.258 -6.5E+03 8.0E-06
591-78-6 Hexanone, 2-2.3 0.069 -6.3E+00 2.2E-03
67-63-0 Isopropanol 2.4 0.072 -4.2E+01 3.5E-04
78-93-3 Methyl Ethyl Ketone (2-Butanone)2.1 0.063 -1.0E+03 1.2E-05
91-20-3 ~Naphthalene 37 1.11 8.3E-02 6.3E-01 1.3E-05 3.5E-01
127-18-4 Tetrachloroethylene 780 23.4 1.1E+01 8.3E+00 2.2E-06 5.6E-01
75-69-4 Trichlorofluoromethane 4.4 0.132 --
Cumulative:1.6E-05 9.2E-01
All concentrations are in ug/m3
Output Form 3B
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
Version Date: February 2018
Basis: November 2017 EPA RSL Table
Site ID: DUP-20190115
Exposure Unit ID:
CAS #Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non-
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 9.6 0.288 -6.5E+03 8.9E-06
75-71-8 Dichlorodifluoromethane 2.6 0.078 -2.1E+01 7.5E-04
67-63-0 Isopropanol 1.6 0.048 -4.2E+01 2.3E-04
78-93-3 Methyl Ethyl Ketone (2-Butanone)2.8 0.084 -1.0E+03 1.6E-05
91-20-3 ~Naphthalene 33 0.99 8.3E-02 6.3E-01 1.2E-05 3.2E-01
127-18-4 Tetrachloroethylene 830 24.9 1.1E+01 8.3E+00 2.3E-06 6.0E-01
75-69-4 Trichlorofluoromethane 4.8 0.144 --
Cumulative:1.4E-05 9.1E-01
All concentrations are in ug/m3
Output Form 3B
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Soil Gas to Indoor Air
Version Date: February 2018
Basis: November 2017 EPA RSL Table
Site ID: SV-01A
Exposure Unit ID:
CAS #Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non-
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 18 0.18 -2.7E+04 1.3E-06
75-71-8 Dichlorodifluoromethane 1.9 0.019 -8.8E+01 4.3E-05
67-63-0 Isopropanol 3.7 0.037 -1.8E+02 4.2E-05
78-93-3 Methyl Ethyl Ketone (2-Butanone)5.3 0.053 -4.4E+03 2.4E-06
91-20-3 ~Naphthalene 21 0.21 3.6E-01 2.6E+00 5.8E-07 1.6E-02
127-18-4 Tetrachloroethylene 1.4 0.014 4.7E+01 3.5E+01 3.0E-10 8.0E-05
75-69-4 Trichlorofluoromethane 1.6 0.016 --
Cumulative:5.8E-07 1.6E-02
All concentrations are in ug/m3
Output Form 3E
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no
risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Soil Gas to Indoor Air
Version Date: February 2018
Basis: November 2017 EPA RSL Table
Site ID: SV-02A
Exposure Unit ID:
CAS #Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non-
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 8.6 0.086 -2.7E+04 6.3E-07
591-78-6 Hexanone, 2-2.3 0.023 -2.6E+01 1.8E-04
67-63-0 Isopropanol 2.4 0.024 -1.8E+02 2.7E-05
78-93-3 Methyl Ethyl Ketone (2-Butanone)2.1 0.021 -4.4E+03 9.6E-07
91-20-3 ~Naphthalene 37 0.37 3.6E-01 2.6E+00 1.0E-06 2.8E-02
127-18-4 Tetrachloroethylene 780 7.8 4.7E+01 3.5E+01 1.7E-07 4.5E-02
75-69-4 Trichlorofluoromethane 4.4 0.044 --
Cumulative:1.2E-06 7.3E-02
All concentrations are in ug/m3
Output Form 3E
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no
risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Soil Gas to Indoor Air
Version Date: February 2018
Basis: November 2017 EPA RSL Table
Site ID: DUP-20190115
Exposure Unit ID:
CAS #Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non-
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 9.6 0.096 -2.7E+04 7.1E-07
75-71-8 Dichlorodifluoromethane 2.6 0.026 -8.8E+01 5.9E-05
67-63-0 Isopropanol 1.6 0.016 -1.8E+02 1.8E-05
78-93-3 Methyl Ethyl Ketone (2-Butanone)2.8 0.028 -4.4E+03 1.3E-06
91-20-3 ~Naphthalene 33 0.33 3.6E-01 2.6E+00 9.1E-07 2.5E-02
127-18-4 Tetrachloroethylene 830 8.3 4.7E+01 3.5E+01 1.8E-07 4.7E-02
75-69-4 Trichlorofluoromethane 4.8 0.048 --
Cumulative:1.1E-06 7.3E-02
All concentrations are in ug/m3
Output Form 3E
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no
risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator