22007 S. Tryon Commercial Vertical Soil Gas Profile Assessment Report_S. Tryon Commercial_20190515

Via Email

May 15, 2019

North Carolina Department of Environmental Quality
Division of Waste Management – Brownfields Program
1646 Mail Service Center
Raleigh, North Carolina 27699-1646

Attention: Mr. Bill Schmithorst, PG

Re: Vertical Soil Gas Profile Assessment Report
S. Tryon Commercial
Charlotte, North Carolina
Brownfields Project No. 22007-18-060
H&H Job No. RMR-006

Dear Bill:

1.0 Introduction

On behalf of RRPV South Tryon Charlotte, LP (the Prospective Developer or PD), Hart &
Hickman, PC (H&H) has prepared this report to document vertical soil gas profile assessment
activities recently completed at the South Tryon Commercial Brownfields property (Brownfields
Project No. 22007-18-060) located northeast of the South Tryon Street and West Tremont
Avenue intersection in a mixed residential and commercial area of South End Charlotte,
Mecklenburg County, North Carolina (Site). A Site location map is provided as Figure 1, and
the Site and surrounding area are shown in Figure 2.

Proposed redevelopment at the Site includes construction of two commercial buildings (Building
AB and Building C) with associated parking areas and open spaces. The future intended uses of
the new buildings include retail and office spaces. The proposed redevelopment layout Site is
depicted in Figure 3.
Mr. Bill Schmithorst, PG
May 15, 2019
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The Site received eligibility into the North Carolina Department of Environmental Quality
(DEQ) Brownfields Program via a Letter of Eligibility dated February 18, 2018. The PD
subsequently elected to participate in the Brownfields Program Redevelopment Now option. As
part of this process, a kick-off/data gap meeting with the PD, counsel for the PD, DEQ
Brownfields personnel, and H&H was held on March 22, 2018 to conduct a Site walk and to
discuss historical uses of the Site, available environmental information, proposed redevelopment
plans, data gaps, and the proposed schedule for completing the Brownfields Agreement.

Based on discussions with DEQ Brownfields during the kick-off/data gap meeting, H&H
prepared a Brownfields Assessment Work Plan (Work Plan) and revisions to the Work Plan
based on DEQ Brownfields comments. The Work Plan received DEQ Brownfields approval in
an email dated May 8, 2018. A brief summary of previous Site assessment activities is provided
in the following section.

1.1 Previous Environmental Assessments

H&H completed soil and soil gas assessment activities at the Site in May 2018 in accordance
with the DEQ Brownfields approved Work Plan. Results of the assessment activities are
documented in the Brownfields Assessment Report dated July 9, 2018. The Brownfields
assessment soil and soil gas sample locations are shown in Figure 3, and a brief summary of the
assessment results is provided below.

 Low levels of volatile organic compounds (VOCs), semi-VOCs (SVOCs), and metals
were detected in soil below DEQ Inactive Hazardous Sites Branch (IHSB)
Industrial/Commercial Preliminary Soil Remediation Goals (PSRGs) and within the
ranges for naturally occurring metals in the area of the Site. Results of cumulative risk
calculations indicated that grading and movement of soil during redevelopment activities
at the Site will not present a significant risk to construction workers or future non-
residential workers.
Mr. Bill Schmithorst, PG
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 Soil gas sample monitoring points were installed to a depth of 10 feet (ft) below ground
surface (bgs) within the footprints of the proposed commercial buildings. Laboratory
analytical results indicated that low levels of several VOCs were detected in each soil gas
sample at concentrations below the DEQ Division of Waste Management (DWM) Non-
Residential Sub-slab and Exterior Soil Gas Screening Levels (SGSLs). Results of
cumulative risk calculations using the highest compound concentrations detected in soil
gas samples collected at the Site indicated that there is no significant vapor intrusion risk
into the proposed buildings. A tabular summary of the May 2018 soil gas sample
analytical data is provided in Table 1.

H&H completed groundwater assessment activities at the Site in July and August 2007. July
2007 groundwater assessment activities included installation of three (3) temporary groundwater
monitoring wells (DPT-2, DPT-8, DPT-9) and collection of groundwater samples for laboratory
analysis. In August 2007, permanent groundwater monitoring well MW-3 was installed and
sampled to further evaluate groundwater conditions in the area of temporary groundwater
monitoring well DPT-9. Locations of the temporary and permanent groundwater monitoring
wells (denoted by DPT and MW nomenclature, respectively) are depicted on Figure 3.

The 2007 groundwater assessment activities are documented in the Summary of Previous
Groundwater Assessment Activities report dated November 19, 2018. A brief summary of the
groundwater assessment results is provided below.

 Results of the groundwater assessment activities indicated that low levels of
tetrachloroethene or PCE (up to 1.6 micrograms per liter [µg/L]), trichloroethene or TCE
(up to 14 µg/L), aldrin (up to 0.63 µg/L), dieldrin (up to 0.75 µg/L) and selenium (up to
33 µg/L) were detected in Site groundwater at concentrations exceeding DEQ
groundwater screening criteria. Cumulative risk calculation results using the highest
compound concentrations detected in Site groundwater samples indicates that there is no
significant vapor intrusion risk for the proposed buildings. This is consistent with results
of the 2018 soil gas sampling activities.
Mr. Bill Schmithorst, PG
May 15, 2019
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Although cumulative risk calculations did not indicate that there is a significant risk for vapor
intrusion into the proposed commercial buildings, DEQ Brownfields expressed concerns
associated with changes to subsurface vapor concentrations and vapor migration patterns that
may result from placement of paved surfaces and construction of new slab-on-grade buildings at
the Site. Based on discussions with DEQ Brownfields personnel, H&H prepared a Vertical Soil
Gas Profile Assessment Work Plan (VI Work Plan) dated April 3, 2019 to complete additional
soil gas assessment activities to further evaluate the potential for vapor intrusion into the
proposed commercial buildings. DEQ provided approval of the VI Work Plan in an email dated
April 8, 2019.

A summary of the vertical soil gas profile assessment activities is provided in the following
sections.

2.0 Vertical Soil Gas Profile Assessment Activities

On April 18 and April 19, 2019, H&H completed vertical soil gas profile assessment activities at
the Site to further evaluate the potential for vapor intrusion and confirm that there are no vadose
zone soil impacts at the Site that would contribute to potential vapor intrusion upon completion
of redevelopment activities. Vertical soil gas profile assessment activities consisted of
advancing five (5) soil borings for installation of nested shallow and deeper soil gas monitoring
points within the approximate footprints of the proposed commercial buildings. Soil gas borings
VMP-8 and VMP-9 were advanced within the footprint of Building C and soil gas borings
VMP-10 through VMP-12 were advanced within the footprint of Building AB. Nested soil gas
boring locations are shown in Figure 4.

The assessment activities were conducted in general accordance with the DEQ Brownfields
approved VI Work Plan, the DEQ IHSB Guidelines for Assessment and Cleanup (Guidelines)
dated October 2015, the DEQ DWM Vapor Intrusion Guidance (VI Guidance) dated March
2018, and the most recent versions of the U.S. Environmental Protection Agency (EPA) Region
IV Science and Ecosystem Support Division (SESD) Field Branches Quality System and
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Technical Procedures guidance.

Prior to conducting field activities, H&H contacted NC One-Call (811), the public utility locator,
to mark subsurface utilities at the Site. H&H also contracted with Probe Utility Locating
(Probe), a private utility locator to screen the proposed boring locations for subsurface utilities.
Additionally, each soil gas boring location was hand cleared to a depth of approximately 5 ft bgs
to further screen the boring locations for the presence of subsurface utilities.

2.1 Soil Gas Sampling Methodologies

H&H contracted with Mid South Environmental, Inc. (Mid South) to advance soil gas borings
utilizing a track-mounted direct-push technology (DPT) drill rig. As described in Section 2.0,
the initial 5 ft of each soil boring were advanced with a decontaminated stainless-steel hand
auger. Beyond the initial 5 ft, the borings were advanced using DPT drilling methods.
Continuous soil samples were collected from the center of the hand auger bucket and using
acetate lined DPT macrocore sleeves at each soil boring. Soil samples were described for
lithologic purposes, observed for obvious evidence of staining and odors, and field screened for
the presence of volatile organic vapors using a calibrated photoionization detector (PID). Field
screening results did not identify obvious evidence of potential soil impacts in soil samples
collected from the soil gas borings. Boring logs with lithologic descriptions and field screening
results are provided in Appendix A.

During soil gas boring advancement, H&H observed the water table at a depth of approximately
20 ft bgs in the area of Building C and approximately 19 ft in the area of Building AB.
Therefore, the deeper Building C soil gas monitoring points (VMP-8 and VMP-9) were installed
to a depth of approximately 16 ft bgs and the deeper Building AB soil gas monitoring points
(VMP-10 through VMP-12) were installed to a depth of approximately 15 ft bgs. Shallow soil
gas monitoring points were installed to a depth of approximately 5.5 ft bgs at each soil gas
boring location.
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A dedicated six-inch stainless-steel vapor implant screen fitted with ¼-inch diameter Teflon®
tubing was installed at the base of each soil gas boring for construction of the deeper soil gas
monitoring points. Filter sand was placed from the base of the soil gas boring to approximately
6-inches above the deeper screened interval. A hydrated bentonite seal was placed from the top
of the filter sand to approximately 5.5 ft bgs. A second six-inch stainless-steel vapor implant
screen fitted with ¼-inch diameter Teflon® tubing was placed at the top of the bentonite seal
within each soil gas boring for construction of the shallow soil gas monitoring points. Filter
sand was placed from the top of the bentonite to approximately 6-inches above the shallow
screened interval. A hydrated bentonite seal was placed from the top of the shallow sample filter
sand to the ground surface.

Prior to sampling, a leak check was conducted for each nested soil gas monitoring point by
constructing a shroud around the sampling system and flooding air within the shroud with
helium gas. Helium concentrations inside the shroud were measured using a helium gas detector
throughout the leak check. Using a syringe and three-way valve, the Teflon® tubing and
surrounding sand pack were purged of approximately three volumes. Once the soil gas
monitoring points were properly purged, vapor was collected from the sample tubing outside the
shroud into a Tedlar® bag and analyzed using the helium gas detector to ensure that helium
concentrations were less than 10% of the helium concentrations measured within the shroud.
Each of the nested soil gas monitoring points passed the leak check criteria.

Following a successful field leak check, soil gas samples were collected from each nested soil
gas monitoring point into six-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. The airflow regulator was calibrated by the laboratory to allow the Summa
canisters to fill at a rate of approximately 100 mL/min. Once the sample train was assembled,
the intake valve on the canister was fully opened to begin collection of the soil gas sample.
Vacuum readings from the Summa canister were recorded prior to and following the sampling
period to ensure adequate sample volume was collected. Per laboratory requirements, vacuum
was maintained within each canister at the conclusion of the sampling event.
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Upon collection of each sample, each Summa canister valve was closed, and the regulator was
disconnected from the canister. The canisters were placed in laboratory supplied shipping
containers, properly labeled and shipped under standard chain-of-custody protocols to Pace
Analytical Services (Pace) for analysis of PCE, TCE, cis-1,2-dichloroethene (DCE), trans-1,2-
DCE, and vinyl chloride by EPA Method TO-15.

Upon completion of sampling activities, each soil gas boring was properly abandoned and the
surfaces were repaired similar to surrounding ground surface. The soil gas boring locations were
estimated using the hand-held global positioning system (GPS) unit.

2.2 Soil Gas Analytical Results

A tabular summary of the vertical soil gas profile analytical results is provided in Table 2. The
soil gas analytical results were compared to DEQ DWM Vapor Intrusion Residential and Non-
Residential Sub-Slab and Exterior Soil Gas Screening Levels (SGSLs) dated February 2018. A
copy of the laboratory analytical report is provided in Appendix B. A summary of deeper and
shallow soil gas sample laboratory analytical results for each proposed building is provided
below.

Building C - Vertical Soil Gas Profile Sampling Results
As shown in Table 2 and in Figure 4, shallow and deeper soil gas samples were collected from
the VMP-8 and VMP-9 soil gas sample locations within the Building C footprint. Low levels of
PCE were detected at concentrations below the Residential and Non-Residential SGSLs of 280
µg/m3 and 3,500 µg/m3, respectively in both deeper (range 1.1 µg/m3 to 7.0 µg/m3) and shallow
(range 1.3 µg/m3 to 1.6 µg/m3) VMP-8 and VMP-9 soil gas samples.

Laboratory analytical results indicate that low levels of TCE were also detected in both the
deeper and shallow VMP-8 and VMP-9 soil gas samples. TCE concentrations detected in the
deeper VMP-8 (85.0 µg/m3) and VMP-9 (15.4 µg/m3) soil gas samples were above the
Residential SGSL of 14 µg/m3, but below the Non-Residential SGSL of 180 µg/m3. Low levels
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of TCE were also detected in the shallow VMP-8 (15.2 µg/m3) and VMP-9 (6.2 µg/m3) soil gas
samples. The TCE concentrations in the shallow VMP-8 soil gas sample slightly exceeds the
Residential SGSL. The TCE concentration detected in the shallow VMP-9 (6.2 µg/m3) soil gas
sample is below both the Residential and Non-Residential SGSLs. TCE was not detected at
concentrations exceeding the Non-Residential SGSL in deeper or shallow VMP-8 and VMP-9
soil gas samples and TCE concentrations detected in shallow soil gas were less than the
concentrations found in the nested deeper soil gas samples.

No other compounds were detected at concentrations above the laboratory method detection
limits in the Building C deeper or shallow soil gas samples, and no compounds were detected at
concentrations exceeding the Non-Residential SGSLs in deeper or shallow Building C soil gas
samples.

Building AB – Vertical Soil Gas Profile Sampling Results
Shallow and deeper soil gas samples were collected from the VMP-10 through VMP-12 sample
locations within the Building AB footprint (Table 2 and Figure 4). Low levels of PCE (up to
130 µg/m3) were detected at concentrations below the Residential SGSL of 280 µg/m3 in each of
the three deeper Building AB soil gas samples. A low level of PCE was detected at a
concentration above the laboratory method detection limit in the shallow VMP-10 (1.9 µg/m3)
soil gas sample, but well below the Residential SGSL. PCE was not detected above the
laboratory method detection limits in the shallow VMP-11 and VMP-12 soil gas samples. PCE
was not detected above the Non-Residential SGSL in the shallow or deeper Building AB soil gas
samples.

Laboratory analytical results indicate that low levels of TCE (up to 140 µg/m3) were also
detected at concentrations above the Residential SGSL of 14 µg/m3 in each of the deeper
Building AB soil gas samples. Concentrations of TCE (up to 1.4 µg/m3) were detected in the
shallow Building AB soil gas samples at levels below the Residential SGSL. TCE was not
detected above the Non-Residential SGSL of 180 µg/m3 in the deeper or shallow Building AB
soil gas samples. In addition, TCE concentrations in shallow Building AB soil gas samples were
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detected at lower levels than found in deeper Building AB soil gas samples.

2.3 Cumulative Risk Calculations

The DEQ DWM SGSLs are conservative and based on a lifetime incremental cancer risk (LICR)
for potential carcinogenic risks of 1 x 10-5 and a non-carcinogenic hazard quotient (HQ) of 0.2
for potential non-carcinogenic risks. The DEQ acceptable level for potential carcinogenic risks
is 1 x 10-4 and the acceptable level for non-carcinogenic risks is a HI less than 1.

To further evaluate potential cumulative risks for structural vapor intrusion into the proposed
Site buildings, H&H utilized the DEQ risk calculator (February 2018) assuming a non-
residential land use scenario based on the planned use at the Site. H&H calculated the
hypothetical worst-case cumulative risks using the highest concentrations of any compound
detected in the soil gas samples. Additionally, H&H calculated the worst-case scenario using the
highest concentrations of any detected compound in the shallow samples and the worst-case
scenario for the deep samples to compare the risk levels for the vertical soil profile within the
footprints of the proposed buildings.

Copies of the completed risk calculator results are provided in Appendix C and a summary of the
risk calculation results is below:

Sample ID Depth Non-Residential Scenario
LICR HI
Worst Case Shallow 5.1 x 10-8 1.7 x 10-2
Worst Case Deeper 5.0 x 10-7 1.7 x 10-1
Worst Case Either Depth 5.0 x 10-7 1.7 x 10-1

As noted in the table above, results of risk calculations indicate that the calculated cumulative
risks do not exceed acceptable levels for a non-residential worker for shallow or deeper soil gas
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under a hypothetical worst-case scenario for the proposed buildings. Additionally, the shallow
worst-case scenario is an order of magnitude below the cumulative risk calculated for deeper soil
gas samples.

Results of vertical soil gas profile assessment activities confirm that there is not a significant
vapor intrusion risk into the proposed commercial buildings. Additionally, attenuation of
concentrations in shallow soil gas indicates that there is no soil source within the footprints of
the proposed buildings that would contribute to potential vapor intrusion or changes to vapor
migration patterns upon completion of proposed redevelopment.

3.0 Summary and Conclusion

H&H has completed vertical soil gas profile assessment activities on the South Tryon
Commercial Brownfields property located northeast of the South Tryon Street and West Tremont
Avenue intersection in Charlotte, North Carolina. The assessment activities were conducted in
accordance with the DEQ Brownfields approved VI Work Plan dated April 3, 2019.

Assessment activities included installation of five (5) nested shallow and deeper soil gas
monitoring points within the footprints of proposed commercial buildings. Soil gas samples
representative of conditions in the shallow and deeper soil profile were collected from each
location and submitted for laboratory analysis the further evaluate the potential for vapor
intrusion and changes to vapor migration patterns that may result from placement of paved
surfaces and construction of new slab-on-grade buildings at the Site.

Results of the assessment indicate that PCE and/or TCE were detected at concentrations above
the laboratory method detection limits in both deeper and shallow soil gas samples. No
compounds were detected at concentrations above the DEQ DWM Vapor Intrusion Non-
Residential SGSLs in shallow or deeper soil gas samples. In addition, compound concentrations
in shallow soil gas were lower than compound concentrations in deeper soil gas. Results of
hypothetical worst-case risk calculations indicate that the cumulative LICR and HI values for
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Attachments:

Table 1 Summary of Previous Soil Gas Analytical Data
Table 2 Summary of Vertical Soil Gas Profile Analytical Data

Figure 1 Site Location Map
Figure 2 Site Map
Figure 3 Previous Assessment Sample Location Map
Figure 4 Vertical Soil Gas Profile Sample Location Map

Appendix A Soil Gas Boring Logs and Monitoring Point Construction Details
Appendix B Laboratory Analytical Report
Appendix C DEQ Risk Calculators (February 2018)

Table 1Summary of Previous Soil Gas Analytical DataSouth Tryon CommercialCharlotte, North CarolinaBrownfields Project No. 22007-18-060H&H Job No. RMR-006DRAFTSample LocationSample IDVMP-1 VMP-2 VMP-4 VMP-5 VMP-6 VMP-7Sample Depth (ft bgs)9.5-10 9.5-10 9.5-10 9.5-10 9.5-10 9.5-10Sampling Date 05/18/18 05/18/18 05/18/18 05/18/18 05/18/18 05/18/18UnitsVOCs (TO-15)Acetone13 J 14 J 11 J 9.9 J 25<6.635 9.2 J 220,000 2,700,000Benzene8.7 21 30 31 36 61 77 5.4 120 1,6002-Butanone (Methyl Ethyl Ketone)1.3 J 1.6 J 1.6 J 1.4 J<0.441.5 J 1.8 J 1.3 J 35,000 440,000Carbon Disulfide5.9 J 12 17 16 32 71 82 3.0 J 4,900 61,000Carbon Tetrachloride<0.372.4 4.1 4.3<0.37 <0.37 <0.371.3 160 2,000Chloroform72 6928 2754 46 290 36041 530cis-1,2-Dichloroethene<0.32 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32NE NECyclohexane<0.49 <0.49 <0.49 <0.49 <0.496.9 8.5<0.4942,000 530,0001,3-Dichlorobenzene25 24 17 15 25 28 31 26 NE NEDichlorodifluoromethane (Freon 12)3.2 L-05 2.8 3.4 L-05 2.9<0.433.0 3.8 L-05 2.8 700 8,8001,1-Dichloroethylene<0.31 <0.31<0.31 <0.31 <0.311.6<0.31 <0.311,400 7,700Ethanol<6.77.1 J<6.7 <6.7 <6.7 <6.7 <6.7 <6.7NE NEEthylbenzene78 90 110 120 91 160 170 22 370 4,9004-Ethyltoluene<0.6040 38 40 20 36 50 8.4 NE NEHeptane13 35 31 34 58 90 110 7.8 2,800 35,000Hexane3.2 J 16 J 10 J 11 J 39 68 88 5.7 J 4,900 61,000Isopropanol0.99 J 3.9 J 1.2 J<0.60 <0.60 <0.60 <0.60 <0.601,400 18,000Propene (Propylene)2.3 J<0.34 <0.34 <0.34 <0.3412 J 48<0.3421,000 260,000Tetrachloroethene6.2 3.7 12 13 84 3.7 1.9<0.75280 3,500Toluene280 380 580 590 580 970 1,100 110 35,000 440,000trans-1,2-Dichloroethene<0.32 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32NE NETrichloroethene66 42 52 536.4708.0 6.1 14 180Trichlorofluoromethane (Freon 11)3.2 J 2.2 J 6.2 5.2 2.2 J 2.9 J 4.2 J 2.2 J NE NE1,2,4-Trimethylbenzene120 120 100 100 45 90 120 25 420 5,3001,3,5-Trimethylbenzene28 26 20 20 11 19 26 6.5 420 5,300Vinyl Acetate1.4 J 3.2 J<0.34 <0.34 <0.349.8 J 12 J 1.8 J 1,400 18,000Vinyl Chloride<0.32 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 <0.3256 2,800m&p-Xylene300 320 410 420 320 550 640 84 700 8,800o-Xylene96 110 140 140 94 160 190 25 700 8,800Notes:1) North Carolina Department of Environmental Quality (DEQ) Division of Waste Management (DWM) Residential Sub-slab and Exterior Soil Gas Screening Levels (SGSLs) (February 2018).2) North Carolina DEQ DWM Non-Residential SGSLs (February 2018).Bold indicates concentration exceeds DEQ Residential SGSLs (February 2018).Only compounds detected in at least one sample are shown.Compound concentrations reported in micrograms per cubic meter (µg/m3) and to the laboratory method detection limits.Analytical method is indicated in parentheses.J = Detected concentration is above the laboratory method detection limit, but below the laboratory reporting limit.L-05 = Laboratory fortified blank/laboratory control sample recovery is outside of control limits and is biased on the high side.ft bgs = feet below ground surface; NE = Not Establishedµg/m3µg/m3µg/m3Building ABBuilding CResidentialSGSL(1)Non-Residential SGSL(2)VMP-3 / DUPLICATE9.5-1005/18/18S:\AAA‐Master Projects\Ram Realty ‐ RMR\RMR‐006 Tryon & Tremont Brownfields Assistance\Vertical Soil Gas Profile Report\Tables\Table 1 South Tryon Commercial SV Table5/3/2019Table 1 (Page 1 of 1)Hart & Hickman, PC
Table 2Summary of Vertical Soil Gas Profile Analytical DataSouth Tryon CommercialCharlotte, North CarolinaBrownfields Project No. 22007-18-060H&H Job No. RMR-006DRAFTSample LocationSample IDSample Depth (ft bgs)5-5.5 15.5-16 5-5.5 15.5-16 5-5.5 14.5-15 5-5.5 14.5-15 5-5.5 14.5-15Sampling Date UnitsVOCs (TO-15)cis-1,2-Dichloroethene<0.34 <0.34 <0.37 <0.33 <0.35 <0.35 <0.35 <0.36 <0.36 <0.34NE NETetrachloroethene1.6 7.0 1.3 1.1 1.9 130<0.5111.9<0.512.7 280 3,500trans-1,2-Dichloroethene<0.44 <0.44 <0.48 <0.42 <0.46 <0.45 <0.46 <0.47 <0.47 <0.44NE NETrichloroethene15.2 85.06.215.4<0.4132.80.68 J1401.411414 180Vinyl Chloride<0.20 <0.20 <0.21 <0.19 <0.20 <0.20 <0.20 <0.21 <0.21 <0.2056 2,800Notes:1) North Carolina Department of Environmental Quality (DEQ) Division of Waste Management (DWM) Residential Sub-slab and Exterior Soil Gas Screening Levels (SGSLs) (February 2018).2) North Carolina DEQ DWM Non-Residential SGSLs (February 2018).Bold indicates concentration exceeds DEQ Residential SGSLs (February 2018).Compound concentrations reported in micrograms per cubic meter (µg/m3) and to the laboratory method detection limits.Analytical method is indicated in parentheses.J = Detected concentration is above the laboratory method detection limit, but below the laboratory reporting limit.ft bgs = feet below ground surface; NE = Not Established04/18/19µg/m3µg/m3µg/m304/18/19 04/18/19 04/18/19 04/18/19Building C Building ABResidential SGSL(1)Non-Residential SGSL(2)VMP-8 VMP-9 VMP-10 VMP-11 VMP-12S:\AAA‐Master Projects\Ram Realty ‐ RMR\RMR‐006 Tryon & Tremont Brownfields Assistance\Vertical Soil Gas Profile Report\Tables\Table 1 South Tryon Commercial SV Table5/3/2019Table 1 (Page 1 of 1)Hart & Hickman, PC
TITLE
PROJECT
SITE LOCATION MAP
SOUTH TRYON COMMERICAL
CHARLOTTE, NORTH CAROLINA
DATE:
JOB NO:
REVISION NO:
FIGURE:
5-3-19 0
1RMR-006
SITE
0 2000 4000
APPROXIMATE
SCALE IN FEET
N
U.S.G.S. QUADRANGLE MAP
QUADRANGLE
7.5 MINUTE SERIES (TOPOGRAPHIC)
CHARLOTTE EAST, NORTH CAROLINA, 1991
REVISION NO. 0
JOB NO. RMR-006
DATE: 5-3-19
FIGURE NO. 2
SOUTH TRYON COMMERCIAL
CHARLOTTE, NORTH CAROLINA
SITE MAP
LEGEND
BROWNFIELDS PROPERTY BOUNDARY
FORMER BUILDING FOOTPRINT
APPROXIMATE LOCATION OF FORMER
GASOLINE UNDERGROUND STORAGE TANK
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
MOTOR FRE
I
G
H
T

S
T
A
T
I
O
N
(1950-1950)
S. TR
Y
O
N
S
T
R
E
E
T
FORMER B&B CONTRACTING
COMPANY
W. TREMON
T

A
V
E
N
U
E
DO
GG
E
T
T

S
TR
E
E
T
NOTES:
1.AERIAL IMAGERY OBTAINED FROM MECKLENBURG COUNTY
GIS (2017).
2.HISTORICAL BUILDING FOOTPRINTS & HISTORICAL USES
OBTAINED FROM AVAILABLE RESOURCES INCLUDING
SANBORN FIRE INSURANCE MAPS, AERIAL PHOTOGRAPHY, &
CITY DIRECTORY.
3.UST = UNDERGROUND STORAGE TANK
FORMER RESTAURANT
(1949-1959)
FORMER FARM MACHINERY
SALES & SERVICE
(1959-1963)
ELECTRICAL SUPPLY
WAREHOUSE BUILDING C
(1960-1990)
FORMER B&B
CONTRACTING COMPANY
FORMER TERMINIX, INC.
(1969-2014)
EMCI LTD
(2101 S. TRYON STREET)
GAS FIRED PRODUCTS
(305 DOGGETT STREET)
MULTI-TENANT COMMERCIAL
(1926-2030 S. TRYON STREET)
MULTI-TENANT COMMERCIAL
(1927 S. TRYON STREET)
FORMER AUTO REPAIR SHOP
(1950-1963)
APPROXIMATE LOCATION
FORMER UST DISPENSER
WEST TREMONT
(BPN 14006-10-060)
TREMONT REDEVELOPMENT
(BPN 18004-14-060)
2100 S. TRYON STREET
(BPN 22054-18-060)
HUGH SUPPLY PROPERTY
(BPN 10049-06-060)S:\AAA-Master Projects\Ram Realty - RMR\RMR-006 Tryon & Tremont Brownfields Assistance\Figures\Figures060418.dwg, FIG 2, 5/3/2019 3:32:41 PM, amckenzie
SB-2
SB-1
SB-3
VMP-3
VMP-2
VMP-1
SB-4
VMP-4
VMP-5
VMP-6
VMP-7
SB-5
SB-6
REVISION NO. 0
JOB NO. RMR-006
DATE: 5-2-19
FIGURE NO. 3
SOUTH TRYON COMMERCIAL
CHARLOTTE, NORTH CAROLINA
PREVIOUS ASSESSMENT
SAMPLE LOCATION MAP
LEGEND
BROWNFIELDS PROPERTY BOUNDARY
FORMER BUILDING FOOTPRINT
PROPOSED BUILDING FOOTPRINT
PROPOSED PARKING/ PLAZA AREA
APPROXIMATE LOCATION OF FORMER
GASOLINE UNDERGROUND STORAGE TANK
SOIL BORING LOCATION
SOIL GAS SAMPLE LOCATION
MONITORING WELL LOCATION
TEMPORARY MONITORING WELL LOCATION
TEMPORARY MONITORING WELL/ SOIL
BORING LOCATION
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
MOTOR FRE
I
G
H
T

S
T
A
T
I
O
N
(1950-1950)
S. TR
Y
O
N
S
T
R
E
E
T
FORMER B&B CONTRACTING
COMPANY
W. TREMON
T

A
V
E
N
U
E
DO
G
G
E
T
T

S
T
R
E
E
T
NOTES:
1.AERIAL IMAGERY OBTAINED FROM MECHLENBURG COUNTY
GIS (2017).
2.SOIL SAMPLES COLLECTED ON 5/17/18 AND 5/18/18.
3.SOIL GAS SAMPLES COLLECTED ON 5/18/18.
4.TCE = TRICHLOROETHYLENE
BZP = BENZO(A)PYRENE
CF = CHLOROFORM
PCE = TETRACHLOROETHYLENE
μg/L = MICROGRAMS PER LITER
μg/m³ = MICROGRAMS PER CUBIC METER
mg/kg = MILLIGRAMS PER KILOGRAM
NA = NOT ANALYZED
5.J FLAG INDICATES AN ESTIMATED CONCENTRATION
BETWEEN THE LABORATORY REPORTING LIMIT AND THE
METHOD DETECTION LIMIT.
6.NO COMPOUNDS DETECTED ABOVE SCREENING LEVELS IN
SOIL SAMPLES SB-1, SB-2, SB-3, SB-4 AND SB-5.
7.HISTORICAL GROUNDWATER DATA ARE IDENTIFIED IN
PURPLE.
FORMER RESTAURANT
(1949-1959)
FORMER B&B
CONTRACTING COMPANY
FORMER TERMINIX, INC.
(1969-2014)
FORMER AUTO REPAIR SHOP
(1950-1963)
APPROXIMATE LOCATION
FORMER UST DISPENSER
SOIL GAS
VMP-2
TCE 42 μg/m³
CF 69 μg/m³
FORMER FARM MACHINERY
SALES & SERVICE (1959-1963)
ELECTRICAL SUPPLY
WAREHOUSE BUILDING C
(1960-1990)
SAMPLE ID
CONCENTRATIONSCONSTITUENTS
SOIL GAS
VMP-2
TCE 42 μg/m³
CF 69 μg/m³
SOIL GAS
VMP-1
TCE 66 μg/m³
CF 72 μg/m³
SOIL GAS
VMP-3 / DUPLICATE
TCE 52/53 μg/m³
CF 28/27 μg/m³
SOIL GAS
VMP-4
TCE 6.4 μg/m³
CF 54 μg/m³
SOIL GAS
VMP-5
TCE 70 μg/m³
CF 46 μg/m³
SOIL GAS
VMP-6
TCE 8.0 μg/m³
CF 290 μg/m³
SOIL GAS
VMP-7
TCE 6.1 μg/m³
CF 360 μg/m³
SOIL
SB-6
BZP 0.17J mg/kg
GROUNDWATER
DPT-8 (7/23/07)
PCE <1.0 μg/L
TCE 2.5 μg/L
DIELDRIN 0.75 μg/LGROUNDWATER
DPT-9 (7/24/07)
PCE <1.0 μg/L
TCE 14 μg/L
DIELDRIN 0.15 μg/LGROUNDWATER
MW-3 (8/9/07)
PCE 1.6 μg/L
TCE 11 μg/L
DIELDRIN <0.050 μg/L
GROUNDWATER
DPT-2 (7/20/07)
PCE <1.0 μg/L
TCE 5.7 μg/L
DIELDRIN NA
BUILDING AB
BUILDING C
S:\AAA-Master Projects\Ram Realty - RMR\RMR-006 Tryon & Tremont Brownfields Assistance\Figures\Figures060418.dwg, FIG 2 ALT, 5/3/2019 3:36:52 PM, amckenzie
VMP-8
VMP-9
VMP-10
VMP-11
VMP-12
REVISION NO. 0
JOB NO. RMR-006
DATE: 5-3-19
FIGURE NO. 4
SOUTH TRYON COMMERCIAL
CHARLOTTE, NORTH CAROLINA
VERTICAL SOIL GAS PROFILE
SAMPLE LOCATION MAP
LEGEND
BROWNFIELDS PROPERTY BOUNDARY
PROPOSED BUILDING FOOTPRINT
PROPOSED PARKING/ PLAZA AREA
NESTED SHALLOW AND DEEPER SOIL GAS
MONITORING POINT SAMPLE LOCATION
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
S. TR
Y
O
N
S
T
R
E
E
T
W. TREMON
T

A
V
E
N
U
E
DO
GG
E
T
T

S
TR
E
E
T
BUILDING AB
BUILDING C
NOTES:
1.AERIAL IMAGERY OBTAINED FROM MECKLENBURG COUNTY GIS
(2017).
2.NESTED SOIL GAS MONITORING POINTS INSTALLED AND
SAMPLED ON 4/18/19.
3.PCE = TETRACHLOROETHENE
TCE = TRICHLOROETHENE
FT BGS = FEET BELOW GROUND SURFACE
μg/m³ = MICROGRAMS PER CUBIC METER
DEQ = DEPARTMENT OF ENVIRONMENTAL QUALITY
DWM = DIVISION OF WASTE MANAGEMENT
SGSL = SUB-SLAB AND EXTERIOR SOIL GAS SCREENING LEVELS
4.J FLAG INDICATES AN ESTIMATED CONCENTRATION BETWEEN
THE LABORATORY REPORTING LIMIT AND THE METHOD
DETECTION LIMIT.
5.BOLD INDICATES CONCENTRATION EXCEED NORTH CAROLINA
DEQ DWM RESIDENTIAL SGSL.
VMP-8
DEPTH 5-5.5 15.5-16
PCE 1.6 7.0
TCE 15.2 85.0
VMP-9
DEPTH 5-5.5 15.5-16
PCE 1.3 1.1
TCE 6.2 15.4
VMP-10
DEPTH 5-5.5 14.5-15
PCE 1.9 130
TCE <0.41 32.8
VMP-11
DEPTH 5-5.5 14.5-15
PCE <0.51 11.9
TCE 0.68 J 140
VMP-12
DEPTH 5-5.5 14.5-15
PCE <0.51 2.7
TCE 1.4 114
VMP-10
DEPTH 5-5.5 14.5-15
PCE 1.9 130
TCE <0.41 32.8
SAMPLE ID
CONCENTRATIONS
(μg/m³)CONSTITUENTS
SAMPLE DEPTH
(FT BGS)S:\AAA-Master Projects\Ram Realty - RMR\RMR-006 Tryon & Tremont Brownfields Assistance\Figures\Figures060418.dwg, FIG 3, 5/3/2019 4:13:39 PM, amckenzie

Appendix A

Soil Gas Boring Logs and Construction Details
NOTES: Hole precleared to 5.0' on 4/18/19 8:45 by Mid South using hand auger. Shallow screen point installed to 5.5 ft bgs. Deeperscreen point installed to 16 ft bgs.
generated using GroundLogs.online
Client:
Project:
Address:
Ram Realty
RMR-006
S. Tryon Commercial , Mecklenburg,Charlotte, NC
WELL LOG
Well No.
Page:
VMP-8
1 of 1
Drilling Start Date:
Drilling End Date:
Drilling Company:
Drilling Method:
Drilling Equipment:
Driller:
Logged By:
4/18/19
4/18/19 9:25
Mid South
Direct Push
Geoprobe 54 DT
Don Warren
Shane Sisco
Boring Depth (ft):
Boring Diameter (in):
Sampling Method(s):
DTW During Drilling (ft):
DTW After Drilling (ft):
Top of Casing Elev. (ft):
Location (X,Y):
16.0
2.50
Well Depth (ft):
Well Diameter (in):
Screen Slot (in):
Riser Material:
Screen Material:
Seal Material(s):
Filter Pack:
Bent. Pellets
Sand Pack
DEPTH (ft)LITHOLOGYWATER LEVELWELLCOMPLETIONCOLLECT
Sample TypeTimeBlow CountsRecovery (ft)SOIL/ROCK VISUAL DESCRIPTION
MEASURE
PID (ppm)Lab SampleDEPTH (ft)0
5
10
15
20
(0') SILT with clay (ML), stiff, moist, reddish orange
(1.5') SILT with sand (ML); medium stiff, dry, white
(5') As Above: gray and tan
(7') As Above: Rock fragments (7'-8')
(12') Sandy SILT (ML); soft, moist, gray and tan and white
(16') Boring terminated
0.0
0.4
0.3
VMP-8Shallow
VMP-8Deep
0
5
10
15
20
NOTES: Hole precleared to 5.0' on 4/18/19 08:10 by Mid South using hand auger. Shallow screen point installed to 5.5 ft bgs. Deeperscreen point installed to 16 ft bgs.
generated using GroundLogs.online
Client:
Project:
Address:
Ram Realty
RMR-006
S. Tryon Commercial , Mecklenburg,Charlotte, NC
WELL LOG
Well No.
Page:
VMP-9
1 of 1
Drilling Start Date:
Drilling End Date:
Drilling Company:
Drilling Method:
Drilling Equipment:
Driller:
Logged By:
4/18/19 8:45
Mid South
Direct Push
Geoprobe 54 DT
Don Warren
Shane Sisco
Boring Depth (ft):
Boring Diameter (in):
Sampling Method(s):
DTW During Drilling (ft):
DTW After Drilling (ft):
Top of Casing Elev. (ft):
Location (X,Y):
20.0
2.50
Well Depth (ft):
Well Diameter (in):
Screen Slot (in):
Riser Material:
Screen Material:
Seal Material(s):
Filter Pack:
Bent. Pellets
Sand Pack
DEPTH (ft)LITHOLOGYWATER LEVELWELLCOMPLETIONCOLLECT
Sample TypeTimeBlow CountsRecovery (ft)SOIL/ROCK VISUAL DESCRIPTION
MEASURE
PID (ppm)Lab SampleDEPTH (ft)0
5
10
15
20
(0') SILT with some clay (ML); stiff, moist, reddish orange
(3') As Above: medium Stiff, dry
(6') As Above: stiff, moist, tan, red and mottled orange
(13') As Above: some black, relict structure
0.0
0.7
0.3
VMP-9Shallow
VMP-9Deep
0
5
10
15
20
(20') As Above: wet
(20') Boring terminated
NOTES: Hole precleared to 5.0' on 4/18/19 9:25 by Mid South using hand auger. Shallow screen point installed to 5.5 ft bgs. Deeperscreen point installed to 15 ft bgs.
generated using GroundLogs.online
Client:
Project:
Address:
Ram Realty
RMR-006
S. Tryon Commercial , Mecklenburg,Charlotte, NC
WELL LOG
Well No.
Page:
VMP-10
1 of 1
Drilling Start Date:
Drilling End Date:
Drilling Company:
Drilling Method:
Drilling Equipment:
Driller:
Logged By:
4/18/19 10:00
Mid South
Direct Push
Geoprobe 54 DT
Don Warren
Shane Sisco
Boring Depth (ft):
Boring Diameter (in):
Sampling Method(s):
DTW During Drilling (ft):
DTW After Drilling (ft):
Top of Casing Elev. (ft):
Location (X,Y):
16.0
2.50
Well Depth (ft):
Well Diameter (in):
Screen Slot (in):
Riser Material:
Screen Material:
Seal Material(s):
Filter Pack:
Bent. Pellets
Sand Pack
DEPTH (ft)LITHOLOGYWATER LEVELWELLCOMPLETIONCOLLECT
Sample TypeTimeBlow CountsRecovery (ft)SOIL/ROCK VISUAL DESCRIPTION
MEASURE
PID (ppm)Lab SampleDEPTH (ft)0
5
10
15
20
(0') Lean CLAY with some silt (CL); medium plasticity, very stiff, dry, brown to red
(2') As Above: Moist
(6') SILT with some clay (ML); medium stiff, moist, reddish
(10') As Above: Mottled orange and tan and red
(16') Boring terminated
6.7
5.9
0.9
VMP-10Shallow
VMP-10Deep
0
5
10
15
20
NOTES: Hole precleared to 5.0' on 4/18/19 10:00 by Mid South using hand auger. Shallow screen point installed to 5.5 ft bgs. Deeperscreen point installed to 15 ft bgs.
generated using GroundLogs.online
Client:
Project:
Address:
Ram Realty
RMR-006
S. Tryon Commercial , Mecklenburg,Charlotte, NC
WELL LOG
Well No.
Page:
VMP-11
1 of 1
Drilling Start Date:
Drilling End Date:
Drilling Company:
Drilling Method:
Drilling Equipment:
Driller:
Logged By:
4/18/19 10:30
Mid South
Direct Push
Geoprobe 54 DT
Don Warren
Alexis McKenzie
Boring Depth (ft):
Boring Diameter (in):
Sampling Method(s):
DTW During Drilling (ft):
DTW After Drilling (ft):
Top of Casing Elev. (ft):
Location (X,Y):
15.0
2.50
Well Depth (ft):
Well Diameter (in):
Screen Slot (in):
Riser Material:
Screen Material:
Seal Material(s):
Filter Pack:
Bent. Pellets
Sand Pack
DEPTH (ft)LITHOLOGYWATER LEVELWELLCOMPLETIONCOLLECT
Sample TypeTimeBlow CountsRecovery (ft)SOIL/ROCK VISUAL DESCRIPTION
MEASURE
PID (ppm)Lab SampleDEPTH (ft)0
5
10
15
20
(0') Lean CLAY with some silt (CL); medium plasticity, very stiff, dry, reddish-brown
(2') As Above: stiff and moist
(7') As Above: soft and yellow
(15') Boring terminated
18.0
31.0
15.4
VMP-11Shallow
VMP-11Deep
0
5
10
15
20
NOTES: Hole precleared to 5.0' on 4/18/19 10:30 by Mid South using hand auger. Shallow screen point installed to 5.5 ft bgs. Deeperscreen point installed to 15 ft bgs.
generated using GroundLogs.online
Client:
Project:
Address:
Ram Realty
RMR-006
S. Tryon Commercial , Mecklenburg,Charlotte, NC
WELL LOG
Well No.
Page:
VMP-12
1 of 1
Drilling Start Date:
Drilling End Date:
Drilling Company:
Drilling Method:
Drilling Equipment:
Driller:
Logged By:
4/18/19 11:15
Mid South
Direct Push
Geoprobe 54 DT
Don Warren
Alexis McKenzie
Boring Depth (ft):
Boring Diameter (in):
Sampling Method(s):
DTW During Drilling (ft):
DTW After Drilling (ft):
Top of Casing Elev. (ft):
Location (X,Y):
15.0
2.50
Well Depth (ft):
Well Diameter (in):
Screen Slot (in):
Riser Material:
Screen Material:
Seal Material(s):
Filter Pack:
Bent. Pellets
Sand Pack
DEPTH (ft)LITHOLOGYWATER LEVELWELLCOMPLETIONCOLLECT
Sample TypeTimeBlow CountsRecovery (ft)SOIL/ROCK VISUAL DESCRIPTION
MEASURE
PID (ppm)Lab SampleDEPTH (ft)0
5
10
15
20
(0') Asphalt: former parking lot material
(1') Lean CLAY with some silt (CL); medium plasticity, very stiff, dry, reddish-brown
(3') As Above: stiff
(5') Lean CLAY with some silt (CL); medium plasticity, stiff, moist, reddish-brown
(7') As Above: stiff, orange
(15') Boring terminated
27.3
30.2
22.4 VMP-12Deep
VMP-12Shallow
0
5
10
15
20

Appendix B

Laboratory Analytical Report

#=CL#
April 26, 2019
LIMS USE: FR - RALPH MCGEE
LIMS OBJECT ID: 92426138
92426138
Project:
Pace Project No.:
RE:
Ralph McGee
Hart & Hickman
2923 S. Tryon St
Suite 100
Charlotte, NC 28203
RMR-006
Dear Ralph McGee:
Enclosed are the analytical results for sample(s) received by the laboratory on April 19, 2019. The
results relate only to the samples included in this report. Results reported herein conform to the most
current, applicable TNI/NELAC standards and the laboratory's Quality Assurance Manual, where
applicable, unless otherwise noted in the body of the report.
If you have any questions concerning this report, please feel free to contact me.
Sincerely,
Kevin Godwin
[e-mail]
Project Manager
1(704)875-9092
Enclosures
cc:Alexis McKenzie, Hart & Hickman
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 1 of 18
#=CP#
CERTIFICATIONS
Pace Project No.:
Project:
92426138
RMR-006
Minnesota Certification IDs
1700 Elm Street SE, Minneapolis, MN 55414-2485
A2LA Certification #: 2926.01
Alabama Certification #: 40770
Alaska Contaminated Sites Certification #: 17-009
Alaska DW Certification #: MN00064
Arizona Certification #: AZ0014
Arkansas DW Certification #: MN00064
Arkansas WW Certification #: 88-0680
California Certification #: 2929
CNMI Saipan Certification #: MP0003
Colorado Certification #: MN00064
Connecticut Certification #: PH-0256
EPA Region 8+Wyoming DW Certification #: via MN 027-
053-137
Florida Certification #: E87605
Georgia Certification #: 959
Guam EPA Certification #: MN00064
Hawaii Certification #: MN00064
Idaho Certification #: MN00064
Illinois Certification #: 200011
Indiana Certification #: C-MN-01
Iowa Certification #: 368
Kansas Certification #: E-10167
Kentucky DW Certification #: 90062
Kentucky WW Certification #: 90062
Louisiana DEQ Certification #: 03086
Louisiana DW Certification #: MN00064
Maine Certification #: MN00064
Maryland Certification #: 322
Massachusetts Certification #: M-MN064
Michigan Certification #: 9909
Minnesota Certification #: 027-053-137
Minnesota Dept of Ag Certifcation #: via MN 027-053-137
Minnesota Petrofund Certification #: 1240
Mississippi Certification #: MN00064
Missouri Certification #: 10100
Montana Certification #: CERT0092
Nebraska Certification #: NE-OS-18-06
Nevada Certification #: MN00064
New Hampshire Certification #: 2081
New Jersey Certification #: MN002
New York Certification #: 11647
North Carolina DW Certification #: 27700
North Carolina WW Certification #: 530
North Dakota Certification #: R-036
Ohio DW Certification #: 41244
Ohio VAP Certification #: CL101
Oklahoma Certification #: 9507
Oregon Primary Certification #: MN300001
Oregon Secondary Certification #: MN200001
Pennsylvania Certification #: 68-00563
Puerto Rico Certification #: MN00064
South Carolina Certification #:74003001
Tennessee Certification #: TN02818
Texas Certification #: T104704192
Utah Certification #: MN00064
Vermont Certification #: VT-027053137
Virginia Certification #: 460163
Washington Certification #: C486
West Virginia DEP Certification #: 382
West Virginia DW Certification #: 9952 C
Wisconsin Certification #: 999407970
Wyoming UST Certification #: via A2LA 2926.01
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 2 of 18
#=SS#
SAMPLE SUMMARY
Pace Project No.:
Project:
92426138
RMR-006
Lab ID Sample ID Matrix Date Collected Date Received
92426138001 VMP-8(5.5') #2055 Air 04/18/19 15:33 04/19/19 06:20
92426138002 VMP-8(16') #0873 Air 04/18/19 15:34 04/19/19 06:20
92426138003 VMP-9(5.5') #3391 Air 04/18/19 15:31 04/19/19 06:20
92426138004 VMP-9(16') #1555 Air 04/18/19 15:32 04/19/19 06:20
92426138005 VMP-10(5.5') #3650 Air 04/18/19 15:26 04/19/19 06:20
92426138006 VMP-10(15') #3450 Air 04/18/19 15:27 04/19/19 06:20
92426138007 VMP-11(5.5') #2807 Air 04/18/19 15:30 04/19/19 06:20
92426138008 VMP-11(15') #0186 Air 04/18/19 15:20 04/19/19 06:20
92426138009 VMP-12(5.5') #0618 Air 04/18/19 15:16 04/19/19 06:20
92426138010 VMP-12(15') #1488 Air 04/18/19 15:22 04/19/19 06:20
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 3 of 18
#=SA#
SAMPLE ANALYTE COUNT
Pace Project No.:
Project:
92426138
RMR-006
Lab ID Sample ID Method
Analytes
Reported LaboratoryAnalysts
92426138001 VMP-8(5.5') #2055 TO-15 5 PASI-MNCK
92426138002 VMP-8(16') #0873 TO-15 5 PASI-MNCK
92426138003 VMP-9(5.5') #3391 TO-15 5 PASI-MNCK
92426138004 VMP-9(16') #1555 TO-15 5 PASI-MNCK
92426138005 VMP-10(5.5') #3650 TO-15 5 PASI-MNCK
92426138006 VMP-10(15') #3450 TO-15 5 PASI-MNCK
92426138007 VMP-11(5.5') #2807 TO-15 5 PASI-MNCK
92426138008 VMP-11(15') #0186 TO-15 5 PASI-MNCK
92426138009 VMP-12(5.5') #0618 TO-15 5 PASI-MNCK
92426138010 VMP-12(15') #1488 TO-15 5 PASI-MNCK
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 4 of 18
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92426138
RMR-006
Sample:VMP-8(5.5') #2055 Lab ID:92426138001 Collected:04/18/19 15:33 Received:04/19/19 06:20 Matrix:Air
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: TO-15TO15 MSV AIR
cis-1,2-Dichloroethene ND ug/m3 04/25/19 22:52 156-59-21.2 0.34 1.55
trans-1,2-Dichloroethene ND ug/m3 04/25/19 22:52 156-60-51.2 0.44 1.55
Tetrachloroethene 1.6 ug/m3 04/25/19 22:52 127-18-41.1 0.49 1.55
Trichloroethene 15.2 ug/m3 04/25/19 22:52 79-01-60.85 0.40 1.55
Vinyl chloride ND ug/m3 04/25/19 22:52 75-01-40.40 0.20 1.55
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#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92426138
RMR-006
Sample:VMP-8(16') #0873 Lab ID:92426138002 Collected:04/18/19 15:34 Received:04/19/19 06:20 Matrix:Air
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: TO-15TO15 MSV AIR
cis-1,2-Dichloroethene ND ug/m3 04/25/19 22:24 156-59-21.2 0.34 1.55
trans-1,2-Dichloroethene ND ug/m3 04/25/19 22:24 156-60-51.2 0.44 1.55
Tetrachloroethene 7.0 ug/m3 04/25/19 22:24 127-18-41.1 0.49 1.55
Trichloroethene 85.0 ug/m3 04/25/19 22:24 79-01-60.85 0.40 1.55
Vinyl chloride ND ug/m3 04/25/19 22:24 75-01-40.40 0.20 1.55
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#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92426138
RMR-006
Sample:VMP-9(5.5') #3391 Lab ID:92426138003 Collected:04/18/19 15:31 Received:04/19/19 06:20 Matrix:Air
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: TO-15TO15 MSV AIR
cis-1,2-Dichloroethene ND ug/m3 04/25/19 23:21 156-59-21.4 0.37 1.68
trans-1,2-Dichloroethene ND ug/m3 04/25/19 23:21 156-60-51.4 0.48 1.68
Tetrachloroethene 1.3 ug/m3 04/25/19 23:21 127-18-41.2 0.53 1.68
Trichloroethene 6.2 ug/m3 04/25/19 23:21 79-01-60.92 0.43 1.68
Vinyl chloride ND ug/m3 04/25/19 23:21 75-01-40.44 0.21 1.68
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#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92426138
RMR-006
Sample:VMP-9(16') #1555 Lab ID:92426138004 Collected:04/18/19 15:32 Received:04/19/19 06:20 Matrix:Air
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: TO-15TO15 MSV AIR
cis-1,2-Dichloroethene ND ug/m3 04/25/19 23:50 156-59-21.2 0.33 1.49
trans-1,2-Dichloroethene ND ug/m3 04/25/19 23:50 156-60-51.2 0.42 1.49
Tetrachloroethene 1.1 ug/m3 04/25/19 23:50 127-18-41.0 0.47 1.49
Trichloroethene 15.4 ug/m3 04/25/19 23:50 79-01-60.81 0.38 1.49
Vinyl chloride ND ug/m3 04/25/19 23:50 75-01-40.39 0.19 1.49
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#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92426138
RMR-006
Sample:VMP-10(5.5') #3650 Lab ID:92426138005 Collected:04/18/19 15:26 Received:04/19/19 06:20 Matrix:Air
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: TO-15TO15 MSV AIR
cis-1,2-Dichloroethene ND ug/m3 04/26/19 00:47 156-59-21.3 0.35 1.61
trans-1,2-Dichloroethene ND ug/m3 04/26/19 00:47 156-60-51.3 0.46 1.61
Tetrachloroethene 1.9 ug/m3 04/26/19 00:47 127-18-41.1 0.51 1.61
Trichloroethene ND ug/m3 04/26/19 00:47 79-01-60.88 0.41 1.61
Vinyl chloride ND ug/m3 04/26/19 00:47 75-01-40.42 0.20 1.61
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#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92426138
RMR-006
Sample:VMP-10(15') #3450 Lab ID:92426138006 Collected:04/18/19 15:27 Received:04/19/19 06:20 Matrix:Air
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: TO-15TO15 MSV AIR
cis-1,2-Dichloroethene ND ug/m3 04/26/19 01:16 156-59-21.3 0.35 1.58
trans-1,2-Dichloroethene ND ug/m3 04/26/19 01:16 156-60-51.3 0.45 1.58
Tetrachloroethene 130 ug/m3 04/26/19 01:16 127-18-41.1 0.50 1.58
Trichloroethene 32.8 ug/m3 04/26/19 01:16 79-01-60.86 0.41 1.58
Vinyl chloride ND ug/m3 04/26/19 01:16 75-01-40.41 0.20 1.58
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#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92426138
RMR-006
Sample:VMP-11(5.5') #2807 Lab ID:92426138007 Collected:04/18/19 15:30 Received:04/19/19 06:20 Matrix:Air
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: TO-15TO15 MSV AIR
cis-1,2-Dichloroethene ND ug/m3 04/26/19 01:45 156-59-21.3 0.35 1.61
trans-1,2-Dichloroethene ND ug/m3 04/26/19 01:45 156-60-51.3 0.46 1.61
Tetrachloroethene ND ug/m3 04/26/19 01:45 127-18-41.1 0.51 1.61
Trichloroethene 0.68J ug/m3 04/26/19 01:45 79-01-60.88 0.41 1.61
Vinyl chloride ND ug/m3 04/26/19 01:45 75-01-40.42 0.20 1.61
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Page 11 of 18
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92426138
RMR-006
Sample:VMP-11(15') #0186 Lab ID:92426138008 Collected:04/18/19 15:20 Received:04/19/19 06:20 Matrix:Air
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: TO-15TO15 MSV AIR
cis-1,2-Dichloroethene ND ug/m3 04/26/19 02:14 156-59-21.3 0.36 1.64
trans-1,2-Dichloroethene ND ug/m3 04/26/19 02:14 156-60-51.3 0.47 1.64
Tetrachloroethene 11.9 ug/m3 04/26/19 02:14 127-18-41.1 0.51 1.64
Trichloroethene 140 ug/m3 04/26/19 02:14 79-01-60.90 0.42 1.64
Vinyl chloride ND ug/m3 04/26/19 02:14 75-01-40.43 0.21 1.64
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#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92426138
RMR-006
Sample:VMP-12(5.5') #0618 Lab ID:92426138009 Collected:04/18/19 15:16 Received:04/19/19 06:20 Matrix:Air
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: TO-15TO15 MSV AIR
cis-1,2-Dichloroethene ND ug/m3 04/26/19 02:42 156-59-21.3 0.36 1.64
trans-1,2-Dichloroethene ND ug/m3 04/26/19 02:42 156-60-51.3 0.47 1.64
Tetrachloroethene ND ug/m3 04/26/19 02:42 127-18-41.1 0.51 1.64
Trichloroethene 1.4 ug/m3 04/26/19 02:42 79-01-60.90 0.42 1.64
Vinyl chloride ND ug/m3 04/26/19 02:42 75-01-40.43 0.21 1.64
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#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92426138
RMR-006
Sample:VMP-12(15') #1488 Lab ID:92426138010 Collected:04/18/19 15:22 Received:04/19/19 06:20 Matrix:Air
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: TO-15TO15 MSV AIR
cis-1,2-Dichloroethene ND ug/m3 04/26/19 03:11 156-59-21.2 0.34 1.55
trans-1,2-Dichloroethene ND ug/m3 04/26/19 03:11 156-60-51.2 0.44 1.55
Tetrachloroethene 2.7 ug/m3 04/26/19 03:11 127-18-41.1 0.49 1.55
Trichloroethene 114 ug/m3 04/26/19 03:11 79-01-60.85 0.40 1.55
Vinyl chloride ND ug/m3 04/26/19 03:11 75-01-40.40 0.20 1.55
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Page 14 of 18
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
92426138
RMR-006
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
QC Batch:
QC Batch Method:
Analysis Method:
Analysis Description:
601882
TO-15
TO-15
TO15 MSV AIR Low Level
Associated Lab Samples:92426138001, 92426138002, 92426138003, 92426138004, 92426138005, 92426138006, 92426138007,
92426138008, 92426138009, 92426138010
Parameter Units
Blank
Result
Reporting
Limit Qualifiers
METHOD BLANK:3253341
Associated Lab Samples:92426138001, 92426138002, 92426138003, 92426138004, 92426138005, 92426138006, 92426138007,
92426138008, 92426138009, 92426138010
Matrix:Air
AnalyzedMDL
cis-1,2-Dichloroethene ug/m3 ND 0.81 04/25/19 18:330.22
Tetrachloroethene ug/m3 ND 0.69 04/25/19 18:330.31
trans-1,2-Dichloroethene ug/m3 ND 0.81 04/25/19 18:330.28
Trichloroethene ug/m3 ND 0.55 04/25/19 18:330.26
Vinyl chloride ug/m3 ND 0.26 04/25/19 18:330.13
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
3253342LABORATORY CONTROL SAMPLE:
LCSSpike
cis-1,2-Dichloroethene ug/m3 42.340.3 105 70-130
Tetrachloroethene ug/m3 72.868.9 106 70-130
trans-1,2-Dichloroethene ug/m3 49.840.3 123 70-130
Trichloroethene ug/m3 53.854.6 99 70-130
Vinyl chloride ug/m3 25.126 97 70-130
Parameter Units
Dup
Result
Max
RPD QualifiersRPDResult
92426138004
3253980SAMPLE DUPLICATE:
cis-1,2-Dichloroethene ug/m3 ND 25ND
Tetrachloroethene ug/m3 1.0J 251.1
trans-1,2-Dichloroethene ug/m3 ND 25ND
Trichloroethene ug/m3 15.4 0 2515.4
Vinyl chloride ug/m3 ND 25ND
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#=QL#
QUALIFIERS
Pace Project No.:
Project:
92426138
RMR-006
DEFINITIONS
DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot.
ND - Not Detected at or above adjusted reporting limit.
TNTC - Too Numerous To Count
J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
MDL - Adjusted Method Detection Limit.
PQL - Practical Quantitation Limit.
RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and
bias for a specific analyte in a specific matrix.
S - Surrogate
1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is
a combined concentration.
Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values.
LCS(D) - Laboratory Control Sample (Duplicate)
MS(D) - Matrix Spike (Duplicate)
DUP - Sample Duplicate
RPD - Relative Percent Difference
NC - Not Calculable.
SG - Silica Gel - Clean-Up
U - Indicates the compound was analyzed for, but not detected.
Acid preservation may not be appropriate for 2 Chloroethylvinyl ether.
A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA
Method 8260.
N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for
each analyte is a combined concentration.
Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes.
TNI - The NELAC Institute.
LABORATORIES
Pace Analytical Services - MinneapolisPASI-M
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Page 16 of 18
#=CR#
QUALITY CONTROL DATA CROSS REFERENCE TABLE
Pace Project No.:
Project:
92426138
RMR-006
Lab ID Sample ID QC Batch Method QC Batch Analytical Method
Analytical
Batch
92426138001 601882VMP-8(5.5') #2055 TO-15
92426138002 601882VMP-8(16') #0873 TO-15
92426138003 601882VMP-9(5.5') #3391 TO-15
92426138004 601882VMP-9(16') #1555 TO-15
92426138005 601882VMP-10(5.5') #3650 TO-15
92426138006 601882VMP-10(15') #3450 TO-15
92426138007 601882VMP-11(5.5') #2807 TO-15
92426138008 601882VMP-11(15') #0186 TO-15
92426138009 601882VMP-12(5.5') #0618 TO-15
92426138010 601882VMP-12(15') #1488 TO-15
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Page 17 of 18
Page 18 of 18

Appendix C

DEQ Risk Calculators (February 2018)
North Carolina DEQ Risk Calculator
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
5/1/2019
Prepared By:Alexis McKenzie
Ralph McGee
Worst Case - Deep Soil Gas
North Carolina Department of Environmental Quality
Risk Calculator
RMR-006
South Tryon Commerical
Department of Waste Management Brownfields Program
22007-18-060
February 2018
November 2017 EPA RSL Table
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: February 2018
Basis: November 2017 EPA RSL Table
Site ID: 22007-18-060
Exposure Unit ID: Worst Case - Deep Soil Gas
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Surface Soil Exposure Point Concentration Table
Input Form 2B Subsurface Soil Exposure Point Concentration Table
Input Form 2C Groundwater Exposure Point Concentration Table
Input Form 2D Surface Water Exposure Point Concentration Table
Input Form 2E Soil Gas Exposure Point Concentration Table
Input Form 2F Indoor Air Exposure Point Concentration Table
Output Form 1A Summary of Risk Assessment Output
Output Form 2A Resident Soil Combined Pathways
Output Form 2B Resident Groundwater Combined Pathways
Output Form 2C Non-Residential Worker Soil Combined Pathways
Output Form 2D Non-Residential Worker Groundwater Combined Pathways
Output Form 2E Construction Worker Soil Combined Pathways
Output Form 2F User Defined Soil Combined Pathways
Output Form 2G User Defined Surface Water Combined Pathways
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil Source to Groundwater POE - Forward Mode
Output Form 4B Groundwater Source to Groundwater POE - Forward Mode
Output Form 4C Soil Source to Surface Water POE - Forward Mode
Output Form 4D Groundwater Source to Surface Water POE - Forward Mode
Output Form 4E Soil Source to Groundwater POE - Backward Mode
Output Form 4F Groundwater Source to Groundwater POE - Backward Mode
Output Form 4G Soil Source to Surface Water POE - Backward Mode
Output Form 4H Groundwater Source to Surface Water POE - Backward Mode
Output Section 4 - Contaminant Migration to Point of Exposure (POE) Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Primary Calculators
North Carolina DEQ Risk Calculator
Complete Exposure Pathways
Version Date: February 2018
Basis: November 2017 EPA RSL Table
Site ID: 22007-18-060
Exposure Unit ID: Worst Case - Deep Soil Gas
Note: Risk output will only be calculated for complete exposure pathways.
Receptor Pathway
Check box if
pathway
complete
Soil Combined Pathways
Groundwater Combined Pathways
Soil Combined Pathways
Groundwater Combined Pathways
Construction Worker Soil Combined Pathways
Soil Combined Pathways
Surface Water Combined Pathways
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Source Soil
Source Groundwater
Source Soil
Source Groundwater
Input Form 1A
VAPOR INTRUSION PATHWAYS
PRIMARY PATHWAYS
Resident
Non-Residential Worker
User Defined
Resident
Non-Residential Worker
CONTAMINANT MIGRATION PATHWAYS
Protection of Groundwater Use
Protection of Surface Water
North Carolina DEQ Risk Calculator
Exposure Point Concentrations
Version Date: February 2018
Basis: November 2017 EPA RSL Table
Site ID: 22007-18-060
Exposure Unit ID: Worst Case - Deep Soil Gas
Note: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
Exposure Point
Concentration
(ug/m3)
Justification for Exposure Point
Concentration CAS Number Chemical
Minimum
Concentration
(Qualifier)
Maximum
Concentration
(Qualifier)
Units
Location of
Maximum
Concentration
Detection
Frequency
Range of
Detection
Limits
Concentration
Used for
Screening
Background
Value
Screening
Toxicity Value
(Screening
Level) (n/c)
Potential
ARAR/TBC
Value
Potential
ARAR/TBC
Source
COPC Flag
(Y/N)
Rationale for
Selection or
Deletion
130 127-18-4 Tetrachloroethylene ug/m3
140 79-01-6 Trichloroethylene ug/m3
Input Form 2E
Soil Gas Exposure Point Concentration Table
North Carolina DEQ Risk Calculator
Summary of Risk Assessment Output Output Form 1A
Version Date: February 2018
Basis: November 2017 EPA RSL Table
Site ID: 22007-18-060
Exposure Unit ID: Worst Case - Deep Soil Gas
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil Combined Pathways NC NC NC
Groundwater Combined Pathways*NC NC NC
Soil Combined Pathways NC NC NC
Groundwater Combined Pathways*NC NC NC
Construction Worker Soil Combined Pathways NC NC NC
Soil Combined Pathways NC NC NC
Surface Water Combined Pathways*NC NC NC
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air NC NC NC
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 5.0E-07 1.7E-01 NO
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
PRIMARY CALCULATORS
Resident
Non-Residential Worker
User Defined
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed
the NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a
risk-based closure.
Protection of Surface Water Exceedence of 2B at POE?
Exceedence of 2B at POE?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target POE Concentrations Exceeded?
Protection of Groundwater Use Exceedence of 2L at POE?
Exceedence of 2L at POE?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for
lead concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
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: 22007-18-060
Exposure Unit ID: Worst Case - Deep Soil Gas
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
127-18-4 Tetrachloroethylene 130 1.3 4.7E+01 3.5E+01 2.8E-08 7.4E-03
79-01-6 Trichloroethylene 140 1.4 3.0E+00 1.8E+00 4.7E-07 1.6E-01
Cumulative:5.0E-07 1.7E-01
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
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
Worst Case - Shallow Soil Gas
North Carolina Department of Environmental Quality
Risk Calculator
RMR-006
South Tryon Commerical
Department of Waste Management Brownfields Program
22007-18-060
February 2018
November 2017 EPA RSL Table
5/1/2019
Prepared By:Alexis McKenzie
Ralph McGee
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: February 2018
Basis: November 2017 EPA RSL Table
Site ID: 22007-18-060
Exposure Unit ID: Worst Case - Shallow Soil Gas
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Surface Soil Exposure Point Concentration Table
Input Form 2B Subsurface Soil Exposure Point Concentration Table
Input Form 2C Groundwater Exposure Point Concentration Table
Input Form 2D Surface Water Exposure Point Concentration Table
Input Form 2E Soil Gas Exposure Point Concentration Table
Input Form 2F Indoor Air Exposure Point Concentration Table
Output Form 1A Summary of Risk Assessment Output
Output Form 2A Resident Soil Combined Pathways
Output Form 2B Resident Groundwater Combined Pathways
Output Form 2C Non-Residential Worker Soil Combined Pathways
Output Form 2D Non-Residential Worker Groundwater Combined Pathways
Output Form 2E Construction Worker Soil Combined Pathways
Output Form 2F User Defined Soil Combined Pathways
Output Form 2G User Defined Surface Water Combined Pathways
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil Source to Groundwater POE - Forward Mode
Output Form 4B Groundwater Source to Groundwater POE - Forward Mode
Output Form 4C Soil Source to Surface Water POE - Forward Mode
Output Form 4D Groundwater Source to Surface Water POE - Forward Mode
Output Form 4E Soil Source to Groundwater POE - Backward Mode
Output Form 4F Groundwater Source to Groundwater POE - Backward Mode
Output Form 4G Soil Source to Surface Water POE - Backward Mode
Output Form 4H Groundwater Source to Surface Water POE - Backward Mode
Output Section 4 - Contaminant Migration to Point of Exposure (POE) Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Primary Calculators
North Carolina DEQ Risk Calculator
Complete Exposure Pathways
Version Date: February 2018
Basis: November 2017 EPA RSL Table
Site ID: 22007-18-060
Exposure Unit ID: Worst Case - Shallow Soil Gas
Note: Risk output will only be calculated for complete exposure pathways.
Receptor Pathway
Check box if
pathway
complete
Soil Combined Pathways
Groundwater Combined Pathways
Soil Combined Pathways
Groundwater Combined Pathways
Construction Worker Soil Combined Pathways
Soil Combined Pathways
Surface Water Combined Pathways
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Source Soil
Source Groundwater
Source Soil
Source Groundwater
Resident
Non-Residential Worker
CONTAMINANT MIGRATION PATHWAYS
Protection of Groundwater Use
Protection of Surface Water
Input Form 1A
VAPOR INTRUSION PATHWAYS
PRIMARY PATHWAYS
Resident
Non-Residential Worker
User Defined
North Carolina DEQ Risk Calculator
Exposure Point Concentrations
Version Date: February 2018
Basis: November 2017 EPA RSL Table
Site ID: 22007-18-060
Exposure Unit ID: Worst Case - Shallow Soil Gas
Note: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
Exposure Point
Concentration
(ug/m3)
Justification for Exposure Point
Concentration CAS Number Chemical
Minimum
Concentration
(Qualifier)
Maximum
Concentration
(Qualifier)
Units
Location of
Maximum
Concentration
Detection
Frequency
Range of
Detection
Limits
Concentration
Used for
Screening
Background
Value
Screening
Toxicity Value
(Screening
Level) (n/c)
Potential
ARAR/TBC
Value
Potential
ARAR/TBC
Source
COPC Flag
(Y/N)
Rationale for
Selection or
Deletion
1.9 127-18-4 Tetrachloroethylene ug/m3
15.2 79-01-6 Trichloroethylene ug/m3
Input Form 2E
Soil Gas Exposure Point Concentration Table
North Carolina DEQ Risk Calculator
Summary of Risk Assessment Output Output Form 1A
Version Date: February 2018
Basis: November 2017 EPA RSL Table
Site ID: 22007-18-060
Exposure Unit ID: Worst Case - Shallow Soil Gas
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil Combined Pathways NC NC NC
Groundwater Combined Pathways*NC NC NC
Soil Combined Pathways NC NC NC
Groundwater Combined Pathways*NC NC NC
Construction Worker Soil Combined Pathways NC NC NC
Soil Combined Pathways NC NC NC
Surface Water Combined Pathways*NC NC NC
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air NC NC NC
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 5.1E-08 1.7E-02 NO
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed
the NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a
risk-based closure.
Protection of Surface Water Exceedence of 2B at POE?
Exceedence of 2B at POE?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target POE Concentrations Exceeded?
Protection of Groundwater Use Exceedence of 2L at POE?
Exceedence of 2L at POE?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for
lead concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
PRIMARY CALCULATORS
Resident
Non-Residential Worker
User Defined
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: 22007-18-060
Exposure Unit ID: Worst Case - Shallow Soil Gas
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
127-18-4 Tetrachloroethylene 1.9 0.019 4.7E+01 3.5E+01 4.0E-10 1.1E-04
79-01-6 Trichloroethylene 15.2 0.152 3.0E+00 1.8E+00 5.1E-08 1.7E-02
Cumulative:5.1E-08 1.7E-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
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
5/1/2019
Prepared By:Alexis McKenzie
Ralph McGee
Worst Case - Shallow/Deep Soil Gas
North Carolina Department of Environmental Quality
Risk Calculator
RMR-006
South Tryon Commerical
Department of Waste Management Brownfields Program
22007-18-060
February 2018
November 2017 EPA RSL Table
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: February 2018
Basis: November 2017 EPA RSL Table
Site ID: 22007-18-060
Exposure Unit ID: Worst Case - Shallow/Deep Soil Gas
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Surface Soil Exposure Point Concentration Table
Input Form 2B Subsurface Soil Exposure Point Concentration Table
Input Form 2C Groundwater Exposure Point Concentration Table
Input Form 2D Surface Water Exposure Point Concentration Table
Input Form 2E Soil Gas Exposure Point Concentration Table
Input Form 2F Indoor Air Exposure Point Concentration Table
Output Form 1A Summary of Risk Assessment Output
Output Form 2A Resident Soil Combined Pathways
Output Form 2B Resident Groundwater Combined Pathways
Output Form 2C Non-Residential Worker Soil Combined Pathways
Output Form 2D Non-Residential Worker Groundwater Combined Pathways
Output Form 2E Construction Worker Soil Combined Pathways
Output Form 2F User Defined Soil Combined Pathways
Output Form 2G User Defined Surface Water Combined Pathways
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil Source to Groundwater POE - Forward Mode
Output Form 4B Groundwater Source to Groundwater POE - Forward Mode
Output Form 4C Soil Source to Surface Water POE - Forward Mode
Output Form 4D Groundwater Source to Surface Water POE - Forward Mode
Output Form 4E Soil Source to Groundwater POE - Backward Mode
Output Form 4F Groundwater Source to Groundwater POE - Backward Mode
Output Form 4G Soil Source to Surface Water POE - Backward Mode
Output Form 4H Groundwater Source to Surface Water POE - Backward Mode
Output Section 4 - Contaminant Migration to Point of Exposure (POE) Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Primary Calculators
North Carolina DEQ Risk Calculator
Complete Exposure Pathways
Version Date: February 2018
Basis: November 2017 EPA RSL Table
Site ID: 22007-18-060
Exposure Unit ID: Worst Case - Shallow/Deep Soil Gas
Note: Risk output will only be calculated for complete exposure pathways.
Receptor Pathway
Check box if
pathway
complete
Soil Combined Pathways
Groundwater Combined Pathways
Soil Combined Pathways
Groundwater Combined Pathways
Construction Worker Soil Combined Pathways
Soil Combined Pathways
Surface Water Combined Pathways
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Source Soil
Source Groundwater
Source Soil
Source Groundwater
Input Form 1A
VAPOR INTRUSION PATHWAYS
PRIMARY PATHWAYS
Resident
Non-Residential Worker
User Defined
Resident
Non-Residential Worker
CONTAMINANT MIGRATION PATHWAYS
Protection of Groundwater Use
Protection of Surface Water
North Carolina DEQ Risk Calculator
Exposure Point Concentrations
Version Date: February 2018
Basis: November 2017 EPA RSL Table
Site ID: 22007-18-060
Exposure Unit ID: Worst Case - Shallow/Deep Soil Gas
Note: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
Exposure Point
Concentration
(ug/m3)
Justification for Exposure Point
Concentration CAS Number Chemical
Minimum
Concentration
(Qualifier)
Maximum
Concentration
(Qualifier)
Units
Location of
Maximum
Concentration
Detection
Frequency
Range of
Detection
Limits
Concentration
Used for
Screening
Background
Value
Screening
Toxicity Value
(Screening
Level) (n/c)
Potential
ARAR/TBC
Value
Potential
ARAR/TBC
Source
COPC Flag
(Y/N)
Rationale for
Selection or
Deletion
130 127-18-4 Tetrachloroethylene ug/m3
140 79-01-6 Trichloroethylene ug/m3
Input Form 2E
Soil Gas Exposure Point Concentration Table
North Carolina DEQ Risk Calculator
Summary of Risk Assessment Output Output Form 1A
Version Date: February 2018
Basis: November 2017 EPA RSL Table
Site ID: 22007-18-060
Exposure Unit ID: Worst Case - Shallow/Deep Soil Gas
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil Combined Pathways NC NC NC
Groundwater Combined Pathways*NC NC NC
Soil Combined Pathways NC NC NC
Groundwater Combined Pathways*NC NC NC
Construction Worker Soil Combined Pathways NC NC NC
Soil Combined Pathways NC NC NC
Surface Water Combined Pathways*NC NC NC
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air NC NC NC
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 5.0E-07 1.7E-01 NO
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
PRIMARY CALCULATORS
Resident
Non-Residential Worker
User Defined
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed
the NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a
risk-based closure.
Protection of Surface Water Exceedence of 2B at POE?
Exceedence of 2B at POE?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target POE Concentrations Exceeded?
Protection of Groundwater Use Exceedence of 2L at POE?
Exceedence of 2L at POE?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for
lead concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
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: 22007-18-060
Exposure Unit ID: Worst Case - Shallow/Deep Soil Gas
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
127-18-4 Tetrachloroethylene 130 1.3 4.7E+01 3.5E+01 2.8E-08 7.4E-03
79-01-6 Trichloroethylene 140 1.4 3.0E+00 1.8E+00 4.7E-07 1.6E-01
Cumulative:5.0E-07 1.7E-01
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.