23001_2017-MARCH_ESTUL VI Assessment Report - Final- 03152017

Vapor Intrusion Assessment Report March 15, 2017 Estridge Motorsports, Matthews, NC Page i

TABLE OF CONTENTS

Section Page
1.0 INTRODUCTION ............................................................................................................. 1
2.0 METHODOLOGY ............................................................................................................ 1
2.1 Indoor Air Vapor Assessment............................................................................... 1 2.2 Sub-Slab Vapor Assessment ............................................................................... 3
3.0 SAMPLING RESULTS .................................................................................................... 3
3.1 Indoor Air Sampling Results ................................................................................. 3 3.2 Soil Vapor Sampling Results ................................................................................ 4
3.3 Indoor Air Risk Analysis ....................................................................................... 4
4.0 DIscussion and CONCLUSIONS ................................................................................... 5

FIGURES
Figure 1 Site Location Map Figure 2 Site Map with Sampling Locations
TABLES
Table 1 Summary of Indoor Air Quality Analytical Results
Table 2 Summary of Sub-Slab Soil Gas Analytical Results Table 3 Summary of Vapor Intrusion Risk
APPENDIX

Appendix A Photo Log Appendix B Safety Data Sheets and Field Logs
Appendix C Laboratory Analytical Report and Chain of Custody Documentation
Appendix D Indoor Air Risk Calculators

Vapor Intrusion Assessment Report March 15, 2017 Estridge Motorsports, Matthews, NC Page 1

1.0 INTRODUCTION
Apex Companies, LLC (Apex) has completed a Vapor Intrusion (VI) Assessment of the above
referenced property located at 215 North Ames Street in Matthews, North Carolina (“subject property” or “Site”). Surrounding parcels consist of retail and light industrial properties, office
buildings, private residences and a CSX rail line. A Site Location Map is provided as Figure 1. The assessment was performed to evaluate potential VI conditions. The Site is in a light industrial-
developed area of Matthews and consists of one parcel of land totaling approximately 2.08-acres. The Site is improved with a one-story 32,900 square foot warehouse building and an asphalt-paved parking lot. The site is currently used as a showroom for the sale of motorcycles and for storage.
Items observed in the warehouse building included commercial and residential materials as well as vehicles and a boat. The motors in the vehicles and boat would likely contain gasoline which could
influence indoor air results.
Apex was provided groundwater laboratory data from sampling conducted in 2007 by ATC
Associates of North Carolina, P.C. (ATC). ATC utilized a GeoProbe to collect two grab groundwater
samples, and sampled monitoring well MW-1 located at the northwestern corner of the facility. No data was provided regarding the location of the grab groundwater samples, but these samples were
reportedly collected outside the facility. The groundwater contained methylene chloride, chloroform, and benzene, as well as various solvents including 1,1,1-trichloroethane (1,1,1-TCA), 1,1,2-TCA, and tetrachloroethene (PCE) and their daughter products.
The concentrations of the constituents of concern (COCs) identified in groundwater exceed the current non-residential VI groundwater screening levels. The vapor samples were collected to
confirm that there is no VI issue that would need to be addressed for continued building use.
2.0 METHODOLOGY
2.1 Indoor Air Vapor Assessment

On February 17, 2017, Apex mobilized to the Site to collect indoor air samples at the Estridge Motorsports facility located at 215 North Ames Street, Matthews, North Carolina. Prior to the start
of on-site work, a tailgate safety meeting was completed and the Site-specific health and safety plan
(HASP) was reviewed by Apex personnel. Samples were collected at five pre-determined locations. Indoor air sample IA-1 was placed in the reception office of the lobby area, indoor air sample IA-2
was placed in the showroom section, and the remaining indoor air samples (IA-3 through IA-5) were placed in the warehouse area. All locations were situated at least ten feet from outside walls and care was taken to avoid cracks and joints in the slab (if known or visible). Samples locations are
shown on Figure 2. A photolog is included in Appendix A.
One sample from each location was collected into a six-liter individually-certified Summa canister
equipped with a critical orifice flow regulation device for collection over an eight-hour period.
Appropriate tubing and Swagelok-type fittings were obtained from the laboratory and utilized during sampling. The canister vacuum of each Summa canister was measured before and after sample
collection using a vacuum gauge supplied by the laboratory. Vacuum measurements and sample collection start and stop times were recorded in the field notes. Other recorded data included temperatures at the start and end of the sample period, equipment serial numbers, sampler name,
and any comments, as well as relevant meteorological data that can influence indoor air concentration patterns at the time of sampling (i.e. wind speed, snow or ice cover, significant recent
precipitation, and changes in barometric pressure). The critical orifice flow controller was installed
Vapor Intrusion Assessment Report March 15, 2017 Estridge Motorsports, Matthews, NC Page 2

on the canister and the canister was fully opened at the start of the sample collection period. At the end of the sampling period, the canister vacuum was immediately recorded and the canister valve
was fully closed.
Following sample collection, all Summa canisters were submitted to Con-Test of East Longmeadow, Massachusetts (Con-Test), a North Carolina-certified environmental laboratory, for analysis volatile
organic compounds (VOCs) by Environmental Protection Agency (EPA) Method TO-15. The analyte list was limited to the COCs identified in site groundwater and include the following:
Benzene Chloroethane Chloroform
1,1-Dichloroethane 1,2-Dichloroethane
1,1-Dichloroethylene
cis-1,2-Dichloroethene Trans-1,2-Dichloroethene
Methylene Chloride
Tetrachloroethene 1,1,1-Trichloroethane
1,1,2-Trichloroethane Trichloroethylene Vinyl Chloride
To obtain defensible results, Apex also collected the following quality assurance/quality control (QA/QC) air samples:
• One blind duplicate sample (collected at location IA-5); and
• One background ambient sample (collected at an upwind location). These QA/QC samples, along with the five indoor air samples collected, were submitted to Con-Test
under proper chain of custody protocol. A total of seven Summa canister samples were therefore
submitted for laboratory analysis.
All indoor air samples and quality control/quality assurance (QA/QC) samples were collected in accordance with procedures outlined in the June 2015 USEPA OSWER Technical Guide For Assessing and Mitigating the Vapor Intrusion Pathway from Subsurface Vapor Sources to Indoor Air,
the North Carolina Department of Environmental Quality (NCDEQ) Division of Waste Management (DWM) Inactive Hazardous Sites Branch (IHSB) Steps for Conducting Vapor intrusion Potential
Vapor Intrusion Potential Evaluations under the Inactive Hazardous Sites Branch (13 February
2017), and in the NCDEQ DWM Vapor Intrusion Guidance.
To identify potential background sources of the COCs, Apex reviewed Safety Data Sheets (SDSs) of chemicals currently being used at the Site. A list of these products is provided in Appendix B. Apex identified several products which contain petroleum related compounds. In addition, the
storage of motorized vehicles within the warehouse area could impact results. These vehicles likely contain gasoline (and thereby benzene), one of the analytes included on the COC list.
Vapor Intrusion Assessment Report March 15, 2017 Estridge Motorsports, Matthews, NC Page 3

2.2 Sub-Slab Vapor Assessment
Following the collection of the indoor air samples, Apex personnel returned to the site on February
21, 2017 to install three temporary vapor pins at three locations. Each of the vapor points were purged with a low-flow air pump to remove ambient air in the sample tubing any air introduced to the
sub-slab airspace during installation. To minimize ambient air intrusion, Apex maintained an air flow rate less than 200 milliliters per minute during purging and sampling. While purging, the sample point was covered with a plastic bag and filled with helium to test for leaks in the sample point construction.
A 1-Liter Tedlar bag was connected to the sample point tubing and filled with some of the purged air. The air in the Tedlar bag was then tested for helium using a calibrated helium detector. A supplemental water dam leak detection test was also performed at each location to ensure a proper
seal was achieved. On February 22, 2017, Apex personnel collected sub-slab vapor samples from the three temporary sub-slab vapor points. Vapor point locations are shown on Figure 2.
After purging and leak testing, representative samples of sub-slab soil gas were collected from each
sampling point over a 30-minute period using laboratory supplied 1-Liter batch-certified Summa canisters equipped with a properly regulated flow controller and fittings. The samples were collected
by attaching the sample point tubing to the 1-Liter summa canister and then opening the canister
valve. The time and initial pressure of the summa canister were recorded for each sample collected. The canister vacuum was allowed to drop to approximately -5 inches of mercury (in. Hg), then the
canister valve was closed. The sample collection time, final canister pressure, canister number, and
flow controller number were then recorded for each sample location. Weather conditions, including temperature, barometric pressure, wind speed, and humidity, were recorded before, during and
following sampling activities. All sub-slab air samples were collected in accordance with the procedures outlined in the guidance
documents described above. The sub-slab vapor samples were submitted to Con-Test for analysis of VOCs by EPA Method TO- 15. The analyte list was limited to those COCs listed in Section 2.1. 3.0 SAMPLING RESULTS
3.1 Indoor Air Sampling Results Analytical results for all indoor air samples are reported in micrograms per cubic meter (µg/m3) and
have been compared the NCDEQ DWM Non-Residential Indoor Air Screening Levels (IASLs). The
laboratory analytical report and chain-of-custody documentation are included in Appendix C. Sampling results are presented in Table 1.

Laboratory analytical results of indoor air samples indicate the presence of one or more VOCs in each of the samples. Benzene, a compound found in petroleum products such as gasoline, was
identified in all the indoor air samples at concentrations above the Non-Residential IASL of 1.57 µg/m3. Benzene was detected at concentrations ranging from 7.4 µg/m3 (IA-1 in the lobby area) to 26 µg/m3 (Dup-1 collected in the warehouse area). Benzene was also detected in the ambient air
sample AA-1 at a concentration of 0.61 µg/m3.
Trichloroethylene (TCE) was detected in all the indoor air samples. Concentrations observed in the
samples collected in the warehouse areas (IA-3, IA-4, IA-5 and DUP-1) exceeded the Non-Residential IASL of 1.75 µg/m3 and ranged from 1.8 µg/m3 to 2.6 µg/m3. No other compounds were detected above applicable standards in any of the samples collected.
A duplicate Summa canister sample was collected from location IA-5. Laboratory results of the duplicate sample were compared to those of sample IA-5 to verify the precision of laboratory
Vapor Intrusion Assessment Report March 15, 2017 Estridge Motorsports, Matthews, NC Page 4

analytical techniques. Detected compounds and concentrations in IA-5 were consistent with those identified in the duplicate sample. The relative percent difference (RPD) (calculated using benzene
results) between IA-5 and the duplicate sample is 3.92%, which is within of the range typically
considered acceptable by regulatory agencies such as the USEPA.
3.2 Soil Vapor Sampling Results
Analytical results for all sub-slab vapor samples are reported in µg/m3 and have been compared the
NCDEQ DWM Non-Residential Sub-Slab and Exterior Soil Gas Screening Levels (SGSLs). The laboratory analytical report and chain-of-custody documentation are included in Appendix C. Sub-
slab vapor sampling results are presented on Table 2.
Analytical results of sub-slab vapor samples revealed the presence of Chloroform to be the only
COC present above applicable screening levels. Chloroform was identified in sub-slab sample SS-
1 at a concentration of 640 µg/m3. This exceeds the non-Residential SGSL of 533 µg/m3. No other constituents exceeded the Non-Residential Sub-Slab SGSLs.

Benzene was detected in the subslab samples at concentrations similar to those observed in the indoor air. Concentrations ranged from 18 µg/m3 (SS-1 in showroom area) to 33 µg/m3 (SS-2 in the
warehouse). TCE concentrations were slightly higher in the subslab air than what was observed in
indoor air, with concentrations ranging from 0.83 µg/m3 (SS-1 in showroom area) to 8.6 µg/m3 (SS-2 in the warehouse).
3.3 Indoor Air Risk Analysis

To evaluate the indoor air data and determine if the exceedances of benzene and TCE are of issue, Apex determined the carcinogenic and chronic toxicity (hazard index) for each of the samples. IASLs are based on a carcinogenic target risk of between 1 x 10-6 and 1 x 10-4 and a hazard index (HI) of
0.2, with a safety factor to account for the synergistic effect of four additional VOCs. Apex has calculated the cumulative risk by utilizing the EPA Regional Screening Level (RSL) for Non-Residential Air (carcinogenic target risk = 1E-06) and a Vapor Intrusion Assessment Calculator
(October 2016 RSLs), as a conservative measure. The concentrations were compared with Carcinogenic Target Risk of between 10-6 and 10-4 and Non-cancer hazard index (HI) (=1) values
for a Non-Residential Indoor Air Risk exposure scenarios. A summary of the risk values calculated for
the total of all constituents in the various samples is provided below and on Table 3. Risk calculations are included in Appendix D.

Vapor Intrusion Assessment Report March 15, 2017 Estridge Motorsports, Matthews, NC Page 5

RISK CALCULATION RESULTS
Sample ID Non-Residential
Carcinogenic Risk
Non-Residential
Carcinogenic Risk
(no Benzene)
Non-Residential
Hazard Index
Ambient 5.21 x 10-7 Not Calculated 0.01
IA-1 5.59 x 10-6 9.64 x 10-7 0.18
IA-2 9.10 x 10-6 9.76 x 10-7 0.26
IA-3 1.07 x 10-5 1.36 x 10-6 0.38
IA-4 9.39 x 10-6 1.26 x 10-6 0.44
IA-5 1.70 x 10-5 1.37 x 10-6 0.56
DUP-1 1.77 x 10-5 1.40 x 10-6 0.57

The hazard index values are within acceptable values (less than 1.0), and ranged from 0.18 to 0.57. The cumulative carcinogenic risk levels were elevated and exceeded the threshold value of 1.0 x 10-
6. Since concentrations are less than 1 x 10-4, mitigation is not required. However, the NCDEQ, IHSB
requires that an additional sampling event be conducted during the summer or winter months to confirm the results. Since the benzene observed in the indoor air samples may be the result of indoor
sources, Apex also calculated the carcinogenic risk without benzene. However, without the benzene
included in the calculation, carcinogenic risk values still exceeded the 1 x 10-6 values in the warehouse area.
4.0 DISCUSSION AND CONCLUSIONS
Apex performed an Indoor Air Vapor Assessment which included sampling subslab vapors and indoor air. The laboratory analytical results for indoor air revealed that the site had exceedances for benzene and TCE. Benzene was identified in one or more chemicals currently being used on site
and is likely present in the gasoline powered vehicles being stored in the warehouse area. Indoor
use of this chemical would result in the elevated air levels observed. The benzene concentrations were relatively similar across the site, with concentrations ranging from 7.4 µg/m3 and 26 µg/m3. The
concentrations of benzene within the subslab were of a similar range, indicating that the benzene is likely not present in indoor air as a result of impacts to underlying soil and/or groundwater. Therefore, exceedances of benzene identified in the samples are likely due to indoor sources such as vehicle
storage. Removal of the vehicles and petroleum sources will likely positively impact indoor air quality.
TCE is a known groundwater contaminant at the Site. Additionally, Apex did not identify any known
or suspected chemicals currently in use that the Site that contain this compound. The TCE exceedances identified in samples IA-3, IA-4, and IA-5 are likely due to vapor intrusion issues within
the warehouse.
Apex evaluated the overall health risk associated with the COCs present in the indoor air. The hazard
index values are within acceptable values (less than 1.0), and ranged from 0.18 to 0.57. Without the
impacts of benzene included in the overall carcinogenic risk value, the cumulative risk levels slightly exceeded the threshold value of 1.0 x 10-6 in the warehouse area. Since concentrations are less than
1 x 10-4, mitigation is not required. However, in accordance with NCDEQ DWM Vapor Intrusion
Guidance, an additional sampling event should be conducted at the three locations in the warehouse building during the summer or winter months to confirm the results.

FIGURES

Copyright:© 2013 National Geographic Society, i-cubed
CHECK BY: TH
DRAWN BY: SP
DATE: 3/13/17
SCALE: AS SHOWN
CAD NO.: 510502-001
PRJ NO.: 510502-001
FIGURE
SITE LOCATION MAP
215 AMES STREETMATTHEWS, NORTH CAROLINA
³
03060
Feet
1
^_
SITE LOCATION
!A
!?
!?
!?
!?
!?
!A
!A
!A
&<
W Matthews St
NAmesStAA-1
IA-4
IA-3
IA-1
IA-2
IA-5
SS-1
SS-3
SS-2
MW-1
CHECK BY: TH
DRAWN BY: SP
DATE: 3/13/17
SCALE: AS SHOWN
CAD NO.: 510502-001
PRJ NO.: 510502-001
FIGURE
SITE MAP WITH SAMPLE LOCATIONS
215 AMES STREETMATTHEWS, NORTH CAROLINA
³
0 30 60
Feet
2
!?INDOOR AIR VAPOR SAMPLELOCATION
!A SUB-SLAB VAPOR SAMPLELOCATION
!A AMBIENT AIR SAMPLE LOCATION
&<MONITORING WELL LOCATION

TABLES

Table 1Summary of Indoor Air Quality Analytical ResultsEstridge Motorsports Facility215 Ames StreetMatthews, North CarolinaBenzeneChloroform1,1-Dichloroethane1,1-Dichloroethylenecis-1,2-DichloroethyleneMethylene ChlorideTetrachloroethylene1,1,1-TrichloroethaneTrichloroethylene1.57 0.533 7.67 175 N/E 526 35 4,380 1.75AA-1 (Ambient) Northwest of Ames Street2/17/2017 0.61 0.072 J <0.14 <0.14 <0.14 0.41 J 0.18 J <0.19 <0.19IA-1Reception Office in Lobby Area 2/17/20177.40.27 0.62 4.0 <0.16 2.9 5.4 2.0 0.77IA-2Showroom Area in Warehouse2/17/2017130.22 0.64 4.2 <0.14 10 6.4 2.2 1.0IA-3 Central Area of Warehouse2/17/2017150.2 1.6 9.5 0.089 J 1.8 8.3 5.11.8IA-4Northeastern Section of Warehouse2/17/201713<0.17 1.9 12 0.083 J 2.5 10 6.62.4IA-52/17/201725<0.2 2.2 14 0.13 J 1.3 J 10 72.6DUP-1 (IA-5)2/17/201726<0.2 2.3 14 0.12 J 1.6 11 7.22.6Notes:1. All concentrations are presented in µg/m³. 2. Only compounds with at least one detection are shown.3. Bold concentrations exceed the 15 A NC Division of Waste Management Non Residential Vapor Intrusion Indoor Air Screening Levels (October 2016).4. DUP-1 is a duplicate of sample IA-5Abbreviations:N/E -- Standard Not Established< -- Below Reporting Limit.J -- Estimated Concentration.DUP -- Field DuplicateIASL -- Division of Waste Management Vapor Intrusion Indoor Air Screening Levels (October 2016)Northwestern Section of WarehouseNon Residential IASL Standards Sample NameSample DateMethod EPA TO-15Sample Location
Table 2Summary of Sub-Slab Soil Gas Analytical ResultsEstridge Motorsports Facility215 Ames StreetMatthews, North CarolinaBenzeneChloroform1,1‐Dichloroethane1,1‐Dichloroethylenecis‐1,2‐Dichloroethylenetrans‐1,2‐DichloroethyleneMethylene ChlorideTetrachloroethylene1,1,1‐TrichloroethaneTrichloroethyleneVinyl Chloride1,570 533 7,670 17,500 N/E N/E 52,600 3,500 438,000 175 2,790SS-1 Showroom Area in Warehouse2/22/2017 18640<0.4 1.6 <0.4 <0.4 5.3 30 1.3 0.83 <0.26SS-2Northeastern Section of Warehouse2/22/2017 33 0.57 7.9 520 0.26 J 0.77 1.3 J 25 140 8.6 <0.26SS-3Northwestern Section of Warehouse2/22/2017 20 0.32 J 11 19 <0.4 <0.4 0.8 J 6.7 17 1.5 0.27Notes:1. All concentrations are presented in µg/m³. 2. Only compounds with at least one detection are shown.3. Bold concentrations exceed the 15 A NC Division of Waste Management Non Residential Vapor Intrusion Soil Gas Screening Levels (October 2016).Abbreviations:N/E -- Standard Not Established< -- Below Reporting Limit.J -- Estimated Concentration.SGSL -- Division of Waste Management Vapor Intrusion Soil Gas Screening Levels (October 2016)Non Residential SGSL Standards   Sample Name Sample DateEPA TO‐15Sample Location
Table 3Summary of Vapor Intrusion RiskEstridge Motorsports Facility215 Ames StreetMatthews, North CarolinaNon-Residential Cumulative Risk: Total VOCsNon-Residential Hazard Index: Total VOCS1.00E-06 1.00AMBIENT Northwest of Ames Street2/17/2017 5.21E-07 0.01IA-1Reception Office in Lobby Area2/17/2017 5.59E-06 0.18IA-2Showroom Area in Warehouse2/17/2017 9.10E-06 0.26IA-3 Central Area of Warehouse2/17/2017 1.07E-05 0.38IA-4Northeastern Section of Warehouse2/17/2017 9.39E-06 0.44IA-52/17/2017 1.70E-05 0.56DUP-1 (IA-5)2/17/2017 1.77E-05 0.57Notes:1. All concentrations are presented in µg/m³. 3. Non Residential Hazard Index is calculated by dividing the maximum concentration by the May 2016 EPA Regional Screening Level (RS4. DUP-1 is a duplicate of sample IA-55. Cumulative Risk of 1E-06 and above does not require further assessment6. Cumulative Risk between 1E-04 and 1E-06 requires additional sampling during worst case conditions7. Cumulative Risk of 1E-04 and below requires mitigation8. Hazard Index above 1.0 requires mitigationAbbreviations:DUP -- Field DuplicateIASL -- Division of Waste Management Vapor Intrusion Indoor Air Screening Levels (October 2016)2. Non Residential Cumulative Risk is calculated by dividing the maximum concentration by the May 2016 EPA Regional Screening Level Northwestern Section of WarehouseCumulative Vapor Intrusion Risk Calculations Non Residential IASL Standards Sample NameSample DateSample Location

APPENDIX A
PHOTO LOG

10610 Metromont PkwySuite 206
Charlotte, NC 28269
PROCESSED TLH
DATE February 2017
PHOTOGRAPHIC LOG
Initial Abatement Activities
215 N. Ames Street, Matthews, NC
Photo 1
Viewing the site prior to
sampling activities.
Photo 2
View of the Ambient Air
Sample Located upwind
from the site.
10610 Metromont PkwySuite 206
Charlotte, NC 28269
PROCESSED TLH
DATE February 2017
PHOTOGRAPHIC LOG
Initial Abatement Activities
215 N. Ames Street, Matthews, NC
Photo 3
View of Duplicate Sample
Collected in Warehouse.
Photo 4
View of IA-3.
10610 Metromont PkwySuite 206
Charlotte, NC 28269
PROCESSED TLH
DATE February 2017
PHOTOGRAPHIC LOG
Initial Abatement Activities
215 N. Ames Street, Matthews, NC
Photo 5
View of a Temporary Vapor
Pin Being Installed.
Photo 6
View of Temporary Vapor
Point Being Patched with
Concrete.

APPENDIX B
SAFETY DATA SHEETS AND FIELD LOGS

APPENDIX C LABORATORY ANALYTICAL REPORT AND CHAIN OF CUSTODY
DOCUMENTATION

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APPENDIX D INDOOR AIR RISK CALCULATORS

Sample Date: Name of Site:Estridge Motorsports - Ames StreetName/Address of Sampling Location: Ambient Air Sampling Date:2/17/2017Sample ID:AA‐1Benzene Chloroform1,1-Dichloroethane1,1-DichloroethyleneMethylene ChlorideTetrachloroethylene1,1,1-TrichloroethaneTrichloroethylene0.61 0.072 0.41 0.181.6 0.53 7.7 1,200 47 30.38 0.14 0.00 0.00 0.00 0.00Cumulative Hazard Index (HI) Calculation for Indoor Air Pathway (Non-Residential)Benzene Chloroform1,1-Dichloroethane1,1-DichloroethyleneMethylene ChlorideTetrechloroethylene1,1,1-TrichloroethaneTrichloroethylene0.61 0.072 0.41 0.18130 430 880 2,600 180 22,000 8.80.0047 0.0002 0.0000 0.0002 0.0010 0.0000 0.0000Notes:1. RSLs available at: http://www.epa.gov/reg3hwmd/risk/human/rb-concentration_table/Generic_Tables/index.htm2. Trans-1,2-DCE, toluene and xylenes were not included in the cumulative risk calculation since they currently have no carcinogenic EPA RSLs.3. Cis-1,2-DCE was not included in cumulative risk or HI calculation since there are currently no EPA RSLs. Indoor Air Risk Calculator - Table 1: Cumulative Risk for Non ResidentialCUMULATIVE HI (sum of ratios) 0.01Ratio = Max Concentration ÷ EPA RSLCUMULATIVE RISK (sum of ratios x 10-6)5.21E-07Maximum Concentration Detected (µg/m3)May 2016 EPA Regional Screening Level (RSL) for Non Residential Air [noncancer Hazard Index (HI)=1] (µg/m3)Ratio = Max Concentration ÷ EPA RSLMay 2016 EPA Regional Screening Level (RSL) for Non Residential Air (carcinogenic target risk = 1E-06) (µg/m3)2/17/2017Cumulative Risk Calculation for Indoor Air Pathway (Non-Residential)Maximum Concentration Detected (µg/m3)DSCA Cumulative Risk Calculator v9 ‐ 2‐3‐14
Sample Date: Name of Site:Estridge Motorsports - Ames StreetName/Address of Sampling Location: Reception Office in Lobby Area Sampling Date:2/17/2017Sample ID:IA‐1Benzene Chloroform1,1-Dichloroethane1,1-DichloroethyleneMethylene ChlorideTetrachloroethylene1,1,1-TrichloroethaneTrichloroethylene7.4 0.27 0.62 4 2.9 5.4 2 0.771.6 0.53 7.7 1,200 47 34.63 0.51 0.08 0.00 0.11 0.26Cumulative Hazard Index (HI) Calculation for Indoor Air Pathway (Non-Residential)Benzene Chloroform1,1-Dichloroethane1,1-DichloroethyleneMethylene ChlorideTetrechloroethylene1,1,1-TrichloroethaneTrichloroethylene7.4 0.27 0.62 4 2.9 5.4 2 0.77130 430 880 2,600 180 22,000 8.80.0569 0.0006 0.0045 0.0011 0.0300 0.0001 0.0875Notes:1. RSLs available at: http://www.epa.gov/reg3hwmd/risk/human/rb-concentration_table/Generic_Tables/index.htm2. Trans-1,2-DCE, toluene and xylenes were not included in the cumulative risk calculation since they currently have no carcinogenic EPA RSLs.3. Cis-1,2-DCE was not included in cumulative risk or HI calculation since there are currently no EPA RSLs.CUMULATIVE HI (sum of ratios) 0.18 Indoor Air Risk Calculator - Table 1: Cumulative Risk for Non Residential2/17/2017Cumulative Risk Calculation for Indoor Air Pathway (Non-Residential)Maximum Concentration Detected (µg/m3)May 2016 EPA Regional Screening Level (RSL) for Non Residential Air (carcinogenic target risk = 1E-06) (µg/m3)Ratio = Max Concentration ÷ EPA RSLCUMULATIVE RISK (sum of ratios x 10-6)5.59E-06Maximum Concentration Detected (µg/m3)May 2016 EPA Regional Screening Level (RSL) for Non Residential Air [noncancer Hazard Index (HI)=1] (µg/m3)Ratio = Max Concentration ÷ EPA RSLDSCA Cumulative Risk Calculator v9 ‐ 2‐3‐14
Sample Date: Name of Site:Estridge Motorsports - Ames StreetName/Address of Sampling Location: Showroom in Warehouse Sampling Date:2/17/2017Sample ID:IA‐2Benzene Chloroform1,1-Dichloroethane1,1-DichloroethyleneMethylene ChlorideTetrachloroethylene1,1,1-TrichloroethaneTrichloroethylene13 0.22 0.64 4.2 10 6.4 2.2 11.6 0.53 7.7 1,200 47 38.13 0.42 0.08 0.01 0.14 0.33Cumulative Hazard Index (HI) Calculation for Indoor Air Pathway (Non-Residential)Benzene Chloroform1,1-Dichloroethane1,1-DichloroethyleneMethylene ChlorideTetrechloroethylene1,1,1-TrichloroethaneTrichloroethylene13 0.22 0.64 4.2 10 6.4 2.2 1130 430 880 2,600 180 22,000 8.80.1000 0.0005 0.0048 0.0038 0.0356 0.0001 0.1136Notes:1. RSLs available at: http://www.epa.gov/reg3hwmd/risk/human/rb-concentration_table/Generic_Tables/index.htm2. Trans-1,2-DCE, toluene and xylenes were not included in the cumulative risk calculation since they currently have no carcinogenic EPA RSLs.3. Cis-1,2-DCE was not included in cumulative risk or HI calculation since there are currently no EPA RSLs.CUMULATIVE HI (sum of ratios) 0.26 Indoor Air Risk Calculator - Table 1: Cumulative Risk for Non Residential2/17/2017Cumulative Risk Calculation for Indoor Air Pathway (Non-Residential)Maximum Concentration Detected (µg/m3)May 2016 EPA Regional Screening Level (RSL) for Non Residential Air (carcinogenic target risk = 1E-06) (µg/m3)Ratio = Max Concentration ÷ EPA RSLCUMULATIVE RISK (sum of ratios x 10-6)9.10E-06Maximum Concentration Detected (µg/m3)May 2016 EPA Regional Screening Level (RSL) for Non Residential Air [noncancer Hazard Index (HI)=1] (µg/m3)Ratio = Max Concentration ÷ EPA RSLDSCA Cumulative Risk Calculator v9 ‐ 2‐3‐14
Sample Date: Name of Site:Estridge Motorsports - Ames StreetName/Address of Sampling Location: Central Area of Warehouse Sampling Date:2/17/2017Sample ID:IA‐3Benzene Chloroform1,1-Dichloroethane1,1-DichloroethyleneMethylene ChlorideTetrachloroethylene1,1,1-TrichloroethaneTrichloroethylene15 0.2 1.6 9.5 1.8 8.3 5.1 1.81.6 0.53 7.7 1,200 47 39.38 0.38 0.21 0.00 0.18 0.60Cumulative Hazard Index (HI) Calculation for Indoor Air Pathway (Non-Residential)Benzene Chloroform1,1-Dichloroethane1,1-DichloroethyleneMethylene ChlorideTetrechloroethylene1,1,1-TrichloroethaneTrichloroethylene15 0.2 1.6 9.5 1.8 8.3 5.1 1.8130 430 880 2,600 180 22,000 8.80.1154 0.0005 0.0108 0.0007 0.0461 0.0002 0.2045Notes:1. RSLs available at: http://www.epa.gov/reg3hwmd/risk/human/rb-concentration_table/Generic_Tables/index.htm2. Trans-1,2-DCE, toluene and xylenes were not included in the cumulative risk calculation since they currently have no carcinogenic EPA RSLs.3. Cis-1,2-DCE was not included in cumulative risk or HI calculation since there are currently no EPA RSLs.CUMULATIVE HI (sum of ratios) 0.38 Indoor Air Risk Calculator - Table 1: Cumulative Risk for Non Residential2/17/2017Cumulative Risk Calculation for Indoor Air Pathway (Non-Residential)Maximum Concentration Detected (µg/m3)May 2016 EPA Regional Screening Level (RSL) for Non Residential Air (carcinogenic target risk = 1E-06) (µg/m3)Ratio = Max Concentration ÷ EPA RSLCUMULATIVE RISK (sum of ratios x 10-6)1.07E-05Maximum Concentration Detected (µg/m3)May 2016 EPA Regional Screening Level (RSL) for Non Residential Air [noncancer Hazard Index (HI)=1] (µg/m3)Ratio = Max Concentration ÷ EPA RSLDSCA Cumulative Risk Calculator v9 ‐ 2‐3‐14
Sample Date: Name of Site:Estridge Motorsports - Ames StreetName/Address of Sampling Location: Northeastern Section of Warehouse Sampling Date:2/17/2017Sample ID:IA‐4Benzene Chloroform1,1-Dichloroethane1,1-DichloroethyleneMethylene ChlorideTetrachloroethylene1,1,1-TrichloroethaneTrichloroethylene13 1.9 12 2.5 10 6.6 2.41.6 0.53 7.7 1,200 47 38.13 0.00 0.25 0.00 0.21 0.80Cumulative Hazard Index (HI) Calculation for Indoor Air Pathway (Non-Residential)Benzene Chloroform1,1-Dichloroethane1,1-DichloroethyleneMethylene ChlorideTetrechloroethylene1,1,1-TrichloroethaneTrichloroethylene13 1.9 12 2.5 10 6.6 2.4130 430 880 2,600 180 22,000 8.80.1000 0.0000 0.0136 0.0010 0.0556 0.0003 0.2727Notes:1. RSLs available at: http://www.epa.gov/reg3hwmd/risk/human/rb-concentration_table/Generic_Tables/index.htm2. Trans-1,2-DCE, toluene and xylenes were not included in the cumulative risk calculation since they currently have no carcinogenic EPA RSLs.3. Cis-1,2-DCE was not included in cumulative risk or HI calculation since there are currently no EPA RSLs.CUMULATIVE HI (sum of ratios) 0.44 Indoor Air Risk Calculator - Table 1: Cumulative Risk for Non Residential2/17/2017Cumulative Risk Calculation for Indoor Air Pathway (Non-Residential)Maximum Concentration Detected (µg/m3)May 2016 EPA Regional Screening Level (RSL) for Non Residential Air (carcinogenic target risk = 1E-06) (µg/m3)Ratio = Max Concentration ÷ EPA RSLCUMULATIVE RISK (sum of ratios x 10-6)9.39E-06Maximum Concentration Detected (µg/m3)May 2016 EPA Regional Screening Level (RSL) for Non Residential Air [noncancer Hazard Index (HI)=1] (µg/m3)Ratio = Max Concentration ÷ EPA RSLDSCA Cumulative Risk Calculator v9 ‐ 2‐3‐14
Sample Date: Name of Site:Estridge Motorsports - Ames StreetName/Address of Sampling Location: Northwestern Section of Warehouse Sampling Date:2/17/2017Sample ID:IA‐5Benzene Chloroform1,1-Dichloroethane1,1-DichloroethyleneMethylene ChlorideTetrachloroethylene1,1,1-TrichloroethaneTrichloroethylene25 2.2 14 1.3 10 7 2.61.6 0.53 7.7 1,200 47 315.63 0.00 0.29 0.00 0.21 0.87Cumulative Hazard Index (HI) Calculation for Indoor Air Pathway (Non-Residential)Benzene Chloroform1,1-Dichloroethane1,1-DichloroethyleneMethylene ChlorideTetrechloroethylene1,1,1-TrichloroethaneTrichloroethylene25 2.2 14 1.3 10 7 2.6130 430 880 2,600 180 22,000 8.80.1923 0.0000 0.0159 0.0005 0.0556 0.0003 0.2955Notes:1. RSLs available at: http://www.epa.gov/reg3hwmd/risk/human/rb-concentration_table/Generic_Tables/index.htm2. Trans-1,2-DCE, toluene and xylenes were not included in the cumulative risk calculation since they currently have no carcinogenic EPA RSLs.3. Cis-1,2-DCE was not included in cumulative risk or HI calculation since there are currently no EPA RSLs.CUMULATIVE HI (sum of ratios) 0.56 Indoor Air Risk Calculator - Table 1: Cumulative Risk for Non Residential2/17/2017Cumulative Risk Calculation for Indoor Air Pathway (Non-Residential)Maximum Concentration Detected (µg/m3)May 2016 EPA Regional Screening Level (RSL) for Non Residential Air (carcinogenic target risk = 1E-06) (µg/m3)Ratio = Max Concentration ÷ EPA RSLCUMULATIVE RISK (sum of ratios x 10-6)1.70E-05Maximum Concentration Detected (µg/m3)May 2016 EPA Regional Screening Level (RSL) for Non Residential Air [noncancer Hazard Index (HI)=1] (µg/m3)Ratio = Max Concentration ÷ EPA RSLDSCA Cumulative Risk Calculator v9 ‐ 2‐3‐14
Sample Date: Name of Site:Estridge Motorsports - Ames StreetName/Address of Sampling Location: Northwestern Section of Warehouse Sampling Date:2/17/2017Sample ID:DUP‐1Benzene Chloroform1,1-Dichloroethane1,1-DichloroethyleneMethylene ChlorideTetrachloroethylene1,1,1-TrichloroethaneTrichloroethylene26 2.3 14 1.6 11 7.2 2.61.6 0.53 7.7 1,200 47 316.25 0.00 0.30 0.00 0.23 0.87Cumulative Hazard Index (HI) Calculation for Indoor Air Pathway (Non-Residential)Benzene Chloroform1,1-Dichloroethane1,1-DichloroethyleneMethylene ChlorideTetrechloroethylene1,1,1-TrichloroethaneTrichloroethylene26 2.3 14 1.6 11 7.2 2.6130 430 880 2,600 180 22,000 8.80.2000 0.0000 0.0159 0.0006 0.0611 0.0003 0.2955Notes:1. RSLs available at: http://www.epa.gov/reg3hwmd/risk/human/rb-concentration_table/Generic_Tables/index.htm2. Trans-1,2-DCE, toluene and xylenes were not included in the cumulative risk calculation since they currently have no carcinogenic EPA RSLs.3. Cis-1,2-DCE was not included in cumulative risk or HI calculation since there are currently no EPA RSLs.CUMULATIVE HI (sum of ratios) 0.57 Indoor Air Risk Calculator - Table 1: Cumulative Risk for Non Residential2/17/2017Cumulative Risk Calculation for Indoor Air Pathway (Non-Residential)Maximum Concentration Detected (µg/m3)May 2016 EPA Regional Screening Level (RSL) for Non Residential Air (carcinogenic target risk = 1E-06) (µg/m3)Ratio = Max Concentration ÷ EPA RSLCUMULATIVE RISK (sum of ratios x 10-6)1.77E-05Maximum Concentration Detected (µg/m3)May 2016 EPA Regional Screening Level (RSL) for Non Residential Air [noncancer Hazard Index (HI)=1] (µg/m3)Ratio = Max Concentration ÷ EPA RSLDSCA Cumulative Risk Calculator v9 ‐ 2‐3‐14