DSHW-2023-208936 - 0901a06881270f43

State of Utah Mail - Revised Risk Evaluation for Woodbine Site
Deq submit <[e-mail]>
Revised Risk Evaluation for Woodbine Site
1 message
Dean, Daniel <[e-mail]>Thu, Sep 7, 2023 at 12:42 PM
To: "[e-mail]" <[e-mail]>
Cc: Dale Urban <[e-mail]>, "[e-mail]" <[e-mail]>, "Bowers, Benjamin B"
<[e-mail]>
Dale,
Terracon has revised the Risk Evaluation for the Woodbine Site (also formerly referred to as the
Grainery project) per DWMRC’s comment letter dated August 23, 2023. All of DWMRC’s August
2023 comments should be addressed by the current attached version.
As noted in the response to Comment 6, it is acknowledged that current site risks exceed R315-
101 thresholds. However, because the site is currently fully developed, remediation of source
materials to reduce site risks will require demolition of existing buildings and is only economically
and practicably feasible if conducted concurrently with redevelopment. In prior meetings between
DMWRC and Woodbine Industries, a verbal agreement was reached that a SMP and EC could be
prepared to mitigate existing risks to the greatest degree practicable until remediation can be
conducted concurrently with redevelopment. A similar approach was utilized at the Former Ace
Automotive site. Woodbine Industries is well informed that future redevelopment will require a
Corrective Action Plan and remediation to address the site risks currently present.
Please let me know if you have any questions, comments, or concerns regarding this submittal.
Thanks,
Daniel Dean, PG
Investigation and Remediation Group Manager I Environmental Services
6949 S High Tech Dr #100 I Midvale, UT 84047
D 385.337.5971 I M 801.915.5541
[e-mail] I Terracon.com
DSHW-2023-208936
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9/7/23, 4:18 PM State of Utah Mail - Revised Risk Evaluation for Woodbine Site
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61197179_Woodbine Risk Evaluation_Revision 2 FINAL Signed.pdf
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Facilities | Environmental | Geotechnical | Materials 1
Cover Page
Revised Risk Evaluation
Woodbine Site
534, 540, 545, 549, and 585 West 700
South Salt Lake City, Salt Lake County,
Utah
September 7, 2023 | Terracon Project No. 61197179
Prepared for:
Woodbine Industries, LLC
Salt Lake City, Utah
6949 South High Tech Drive
Midvale, Utah 84047
P [phone]
Terracon.com
Facilities | Environmental | Geotechnical | Materials i
Cover Letter
September 7, 2023
Utah Department of Environmental Quality
Division of Waste Management and Radiation Control
P.O. Box 144880
Salt Lake City, Utah 84114-4880
Attn: Doug Hansen
Division Director
E:[e-mail]
P: [phone]
Re:Revised Risk Evaluation
Woodbine Site
534, 540, 545, 549, and 585 West 700 South
Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61197179
Dear Mr. Hansen:
On behalf of Woodbine Industries, LLC, Terracon is pleased to provide this Revised Risk
Evaluation report per the Division of Waste Management and Radiation Control’s (DWMRC)
comment letter dated August 23, 2023. In addition to the Revised Risk Evaluation report,
Terracon is providing the following written responses to the agency comments.
Comment 1
Section 2.2 of the Risk Evaluation report dated July 26, 2023, described the site conditions
and controls currently in-place or assumed to be in-place in the future that could serve to
potentially create incomplete pathways for exposure. However, the July 26 report goes on to
explicitly state, “to provide a conservative evaluation regarding exposure risks, all routes were
included in the Risk Evaluation.” Please see Section 3 and Appendix C of the report. No
revisions were made to the Risk Evaluation report based on this comment.
Comment 2: Bullet 1
All twelve metals that were reported above laboratory detection limits in soil were retained as
Chemicals of Interest (COIs) for calculating site risks. Please see Table 1 of the Risk
Evaluation report for the complete list of soil COIs and Exposure Point Concentrations (EPCs)
used for risk calculations. No revisions were made to the Risk Evaluation report based on this
comment.
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Comment 2: Bullet 2
The background arsenic analysis presented in Section 2.3.1 is intended to illustrate that soil
arsenic concentrations exceeding background values are limited to non-native fill soils present
at the site. Concentrations of arsenic in native soil at the site are well within the general
background value for Salt Lake County established in DWMRC’s Technical Guide for Risk
Assessments (27 mg/kg), and reported background values at similar sites located in the
vicinity of the Woodbine site as described in Section 2.3. The Risk Evaluation report
acknowledges that arsenic concentrations in fill soil exceed background values, and as such
arsenic was retained as a soil COI in the risk evaluation calculations. Section 2.3.1 has been
revised to clarify. Please see Table 1 of the Revised Risk Evaluation report for the complete
list of soil COIs and EPCs used for the risk calculations.
Comment 2: Bullet 3
An arsenic EPC of 371 mg/kg was used for the risk calculations. Please see Table 1 of the Risk
Evaluation report. No revisions were made to the Risk Evaluation report based on this
comment.
Comment 2: Bullet 4
As noted in Table 1 of the Risk Evaluation report, the maximum reported hexavalent
chromium [Cr(VI)] concentration was used as the Cr(VI) EPC. J-flagged Cr(VI) data was not
excluded from the risk evaluations calculations. Section 2.3.1 has been revised to clarify. The
analytical laboratory was asked to provide the lowest available method detection limit (MDL)
and reporting limit (RL) for Cr(VI) prior to sample submittal of samples.
Comment 3, Bullet 1
Section 3.3 has been revised to clarify which Vapor Intrusion Screening Levels (VISLs) are
being referenced.
Comment 3, Bullet 2
Site risks presented in Section 3 included vapor intrusion risks calculated from site-specific
soil gas data. Please see Table 3 of the Risk Evaluation report for the complete list of soil gas
COIs and EPCs used for the risk calculations. No revisions were made to the Risk Evaluation
report based on this comment.
Comment 4
The vapor intrusion pathway risk estimates presented in Section 3 have been revised using
output data from the United States Environmental Protection Agency (EPA) VISL calculator.
Comment 5, Bullet 1
Section 3.2 has been revised to include vapor intrusion pathway risks to construction workers.
Construction worker vapor intrusion risks were calculated using the Virginia Department of
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Environmental Quality’s Virginia Unified Risk Assessment Model as specified in Section 7.2 of
DWMRC’s Technical Guide for Risk Assessments.
Comment 5, Bullet 2
A target organ analysis was conducted for all exposure scenarios where the cumulative non-
carcinogenic Hazard Index exceeded 1. The target organ analysis results are presented in
Table 4 through Table 9. Due to the large number of COIs present, the target organ analysis
excluded COIs with an individual Hazard Index of <0.1.
Comment 5, Bullet 3
The Risk Evaluation report was revised to include a discussion of the soil-to-groundwater
pathway (Section 3.4).
Comment 6
Terracon concurs that site risks currently exceed R315-101 thresholds. However, because the
site is currently fully developed, remediation of source materials to reduce site risks will
require demolition of existing buildings and is only economically and practicably feasible if
conducted concurrently with redevelopment. Preparation of a Site Management Plan and
Environmental Covenant is recommended as an interim measure to mitigate existing risks to
the greatest degree practicable until remediation can be conducted concurrently with
redevelopment. Section 5 has been revised to clarify this position. DWMRC recently approved
a similar approach at the Former Ace Automotive site.
Please contact our office at [phone] if you have questions regarding this submittal.
Sincerely,
Terracon Consultants, Inc.
Daniel Dean, P.G.Amy Austin
Group Manager Authorized Project Reviewer
Revised Risk Evaluation
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September 7, 2023 | Terracon Project No. 61197179
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Table Of Contents
1.0 Introduction ................................................................................ 1
1.1 Site Description ..................................................................................... 1
1.2 Background Information .......................................................................... 1
1.3 Standard of Care .................................................................................... 4
1.4 Additional Scope Limitations .................................................................... 4
1.5 Reliance ................................................................................................ 4
2.0 Conceptual Site Model .................................................................. 5
2.1 Sources, Release Mechanisms, and Affected Media ..................................... 5
2.2 Receptors and Routes of Exposure............................................................ 6
2.3 Chemicals of Interest .............................................................................. 6
3.0 RSL and VISL Calculator .............................................................. 10
3.1 RSL Calculator Data Inputs .................................................................... 10
3.2 VISL Calculator Data Inputs ................................................................... 11
3.3 Results of the Onsite Risk Evaluation ...................................................... 13
3.4 Soil-To-Groundwater Pathway Evaluation ................................................ 15
4.0 Ecological Risk Assessment.......................................................... 15
5.0 Conclusion................................................................................. 16
6.0 References ................................................................................ 16
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Appendices
APPENDIX A EXHIBITS
Exhibit 1 Site Topographic Map
Exhibit 2 Site Diagram
Exhibit 3 Conceptual Site Model
APPENDIX B TABLES
Table 1 Soil Exposure Point Concentrations
Table 2 Groundwater Exposure Point Concentrations
Table 3 Soil Vapor Exposure Point Concentrations
Table 4 Resident Soil Target Organ Analysis
Table 5 Outdoor Worker Soil Target Organ Analysis
Table 6 Construction Worker Soil Target Organ Analysis
Table 7 Resident Groundwater Target Organ Analysis
Table 8 Resident Soil Vapor Target Organ Analysis
Table 9 Commercial Indoor Worker Soil Vapor Target Organ Analysis
APPENDIX C RISK EVALUATION INPUT AND OUTPUT SHEETS
APPENDIX D APPLICATION FOR A WAIVER OF AN ECOLOGICAL RISK
ASSESSMENT
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1.0 Introduction
1.1 Site Description
The site is an approximately 5.11-acre parcel (APN 15121070010000) located at 534–549
and 585 West 700 South, Salt Lake City, Salt Lake County, Utah. The site is improved with
industrial, office, and restaurant developments.
1.2 Background Information
The site was used as an industrial facility occupied by many tenants including machine
repair shops, steel forging companies, and other miscellaneous industrial-type clients from
the early-1900s through the present. Terracon performed a Limited Site Investigation (LSI)
for High Boy Ventures LLC (Terracon Project 61197025, dated March 21, 2019) and a
subsequent LSI for Alta Investments LLC (Terracon Project 61197179, dated July 15, 2019).
The results of both investigations are included in the Alta Investments LLC LSI (Terracon
Project 61197179, dated July 15, 2019). Twenty-six boreholes were advanced at the site at
depths of up to fifteen feet below ground surface (bgs) to evaluate on-site soil and
groundwater impacts from the long-term historical industrial uses of the site and the
potential for petroleum hydrocarbon and chlorinated solvent contamination from properties
near the site. Of the twenty-six boreholes, fourteen were located within the on-site buildings
and twelve boreholes were located outside of the buildings. Additionally, ten sub-slab soil
vapor points and one exterior soil vapor point were advanced to evaluate soil vapor impacts
from the same potential contaminant sources. Results of the investigation indicated on-site
impacts of several volatile organic compounds (VOCs), polycyclic aromatic hydrocarbons
(PAHs), and metals above regulatory screening levels in the soil and groundwater of the
site. In addition, several chlorinated VOCs were detected in the soil vapor at concentrations
exceeding the United States Environmental Protection Agency (EPA) Residential and/or
Commercial Target Sub-Slab and Near-source Soil Gas Concentration (TSSNSGC) Vapor
Intrusion Screening Levels (VISLs). Based on the findings of the investigations, the source
of the impacts to the soils, groundwater, and soil vapor appears to be from the historical
use of the site.
1.2.1 Phase II Environmental Site Assessment
A Phase II Environmental Site Assessment (Phase II ESA) was conducted on the site in
August 2022 (Terracon Project 61217496) under the Salt Lake Brownfields Assessment
Grant to evaluate the environmental impacts from metals and VOCs reported in soil and
groundwater during previous site investigations. Seven monitoring wells were installed at
the site (MW-1 through MW-7) with three to four soil samples and one groundwater sample
collected at each monitoring well location. The monitoring wells were installed to depths of
30 feet bgs to evaluate whether the limited chlorinated VOC impacts identified in the LSI
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were indicative of more substantial at-depth impacts since these contaminants have
densities greater than water.
The results of the Phase II ESA investigation were as follows:
Soil Sample Results
Field observations during boring installation noted the presence of slag in fill soils
throughout the site. Analytical data for metals in fill soils is consistent with this
observation.
Lead in fill soils exceeded the EPA Residential Regional Screening Level (RSL) in
three samples and the Industrial RSL in two samples. Cadmium exceeded the
Residential RSL in one sample.
Arsenic concentrations exceeded the Industrial RSL in all soil samples from all seven
borings up to depths of twelve feet bgs. Only two soil samples exceeded 50 mg/kg
arsenic. Soil arsenic concentrations above 50 mg/kg were exclusively present in fill
material. The arsenic in soil results from this investigation closely resemble those
from the previous investigations.
Hexavalent chromium [Cr(VI)] concentrations exceeded the Residential RSL in six
samples from four boring locations. Cr(VI) concentrations above the laboratory
Method Detection Limit (MDL) in soil ranged from 0.359 mg/kg to 0.938 mg/kg. Of
the six samples that exceeded the Residential RSL, two exceedances were present
in fill soils, three exceedances were present in shallow native soils, and one
exceedance was present in deep native soils. Both trivalent chromium and Cr(VI)
were evaluated during this investigation.
All samples, except one, reported zirconium concentrations that exceeded the EPA
Residential RSL of 6 mg/kg.
Groundwater Sample Results
All but one groundwater sample exceeded the EPA Maximum Contaminant Level (MCL) for
dissolved arsenic (0.01 mg/L). One sample exceeded the Utah Ground Water Quality
Standard (UGWQS) (0.05 mg/L). Given the low permeability of the subsurface lithology
(primarily clays and silty clays with all monitoring wells purging dry during development)
and the large vertical distance from the bottom of fill soils to the top of the well screens (13
to 19 feet), the dissolved arsenic concentrations exceeding the MCL and/or UGWQS
reported in this investigation appear to be naturally-derived. Dissolved arsenic
concentrations reported in this investigation were similar to those reported in groundwater
present at 10–15 feet bgs in the LSI (Terracon 2019b). Thus, the results from this
investigation suggest that dissolved arsenic concentrations exceeding the MCL and/or
UGWQS reported in the LSI from 10–15 feet bgs are also naturally-derived.
All groundwater sample results were well below Tapwater RSLs, MCLs, Residential VISL
Target Groundwater Concentrations (TGCs), and/or laboratory MDLs for VOCs.
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September 7, 2023 | Terracon Project No. 61197179
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1.2.2 Site Investigation Conclusions
Soil Contamination Evaluation
Arsenic in soil exceeds the Salt Lake County background concentration of 27 mg/kg
(DWMRC 2023) in shallow non-native fill material found in multiple locations at the
site. Additionally, lead in soil exceeds the Residential RSL and/or Industrial RSL in
shallow non-native fill material in multiple locations at the site. Non-native fill
material and native soil throughout the site contains concentrations of zirconium
that exceed the Residential RSL. However, the zirconium concentrations in native
soils appear to be naturally-derived and not the result of industrial contamination.
Calculated 95% Upper Confidence Limits (UCL95s) for arsenic, chromium, and
zirconium in shallow native soils and deep native soils indicate that native soils are
not impacted by leaching from fill soils. All fill soils are present above the
groundwater table, and the majority of the site is covered by buildings, pavement,
concrete, and other impervious surfaces which would limit infiltration of
precipitation.
Concentrations of Cr(VI) in soil exceed the Residential RSL at multiple locations. If
Cr(VI) exceeding the Residential RSL in native soils were derived from industrial
contamination, Cr(VI) exceedances would be expected to be more common in fill
soils than in native soils. This is not the case based on the results from the recent
Phase II ESA. Thus, soil sampling results do not definitively indicate that the
detected concentrations of Cr(VI) above the Residential RSL are derived from
industrial contamination.
Fill soils are impacted by multiple PAH compounds at multiple locations. Native soils
do not appear to be impacted by PAHs present in overlying fill soils.
Soil is not impacted by VOCs below 20 feet bgs. Above 20 feet bgs, soil is impacted
above the Residential RSL by one VOC (1,1,2,2-Tetrachloroethane) at one location.
Groundwater Contamination Evaluation
Groundwater throughout the site is impacted by arsenic above the MCL, but these
impacts appear to be naturally-derived and not the result of industrial
contamination. Groundwater is not impacted above MCLs by any other metals.
Groundwater is not impacted above MCLs by VOCs below 20 feet bgs. At shallower
depths, groundwater is impacted above the MCL by one VOC (Trichloroethene) at
one location. Widespread VOC contamination in groundwater is not present at the
site. Additionally, Groundwater is impacted above the MCL by one PAH compound
(benzo(a)pyrene) at one location.
Soil Vapor Contamination Evaluation
Soil gas is impacted by multiple VOCs at multiple locations above Residential and/or
Commercial VISLs. However, these soil gas impacts do not appear to be well-
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Facilities | Environmental | Geotechnical | Materials 4
correlated with the location and/or magnitude of documented VOC impacts in soil or
groundwater.
1.3 Standard of Care
Terracon’s services were performed in a manner consistent with generally-accepted
practices of the profession undertaken in similar studies in the same geographical area
during the same time period. Terracon makes no warranties, either express or implied,
regarding the findings, conclusions, or recommendations. Please note that Terracon does
not warrant the work of laboratories, regulatory agencies, or other third parties supplying
information used in the preparation of the report.
1.4 Additional Scope Limitations
Findings, conclusions, and recommendations resulting from these services are based upon
information derived from the on-site activities and other services performed under this
Scope of Services; such information is subject to change over time. Certain indicators of the
presence of hazardous substances, petroleum products, or other constituents may have
been latent, inaccessible, unobservable, nondetectable, or not present during these
services, and we cannot represent that the site contains no hazardous substances, toxic
materials, petroleum products, or other latent conditions beyond those identified during the
Scopes of Work completed to date. Subsurface conditions may vary from those encountered
at specific borings or wells or during other surveys, tests, assessments, investigations, or
exploratory services; the data, interpretations, findings, and our recommendations are
based solely upon data obtained at the time and within the scope of these services.
1.5 Reliance
This report has been prepared for the exclusive use of Woodbine Industries, LLC, who can
convey this report to an affiliate, related entity, subsidiary, lender, title insurer, regulatory
or municipal agency, and their agents. Use or reliance by any other third party other than
the Utah Division of Waste Management and Radiation Control (DWMRC) is prohibited
without the written authorization of Woodbine Industries, LLC and Terracon. Any
unauthorized distribution or reuse is at the client’s sole risk. Notwithstanding the foregoing,
reliance by authorized parties will be subject to the terms, conditions, and limitations stated
in the proposal and Terracon’s Terms and Conditions. The limitation of liability, defined in
the Terms and Conditions, is the aggregate limit of Terracon’s liability to the client and all
relying parties unless otherwise agreed in writing.
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Woodbine Site | Salt Lake City, Utah
September 7, 2023 | Terracon Project No. 61197179
Facilities | Environmental | Geotechnical | Materials 5
2.0 Conceptual Site Model
Terracon prepared this Risk Evaluation using the EPA’s online RSL calculator (https://epa-
prgs.ornl.gov/cgi-bin/chemicals/csl_search) and VISL calculator (https://epa-
visl.ornl.gov/cgi-bin/visl_search ) to evaluate the cumulative risk posed by chemicals
remaining at the site in soil, groundwater, and soil vapor. The first step was to develop a
Conceptual Site Model (CSM), which is used to document the potential for exposure to
chemicals at the site based on the source(s) of contamination, the release mechanism(s),
potential routes of exposure (ROE), representative concentrations of contaminants of
interest (COI), and receptors (i.e., property occupants) in order to evaluate site-specific
risks associated with the COIs remaining. A graphical representation of the CSM is
presented as Exhibit 3 (Appendix A). It is important to bear in mind that the CSM
assumes residential land use with complete exposure pathways and no controls for
exposure to impacted site media, and thus provides a highly conservative evaluation.
The objective of the Risk Evaluation was to evaluate whether impacted soil, groundwater,
and soil vapor on-site is contaminated to the extent it poses a human health risk at levels
above target maximum risk levels and hazard indices. Concentrations of COIs in soils were
first compared to the EPA’s RSL Generic Tables and Dilution Attenuation Factor x 20 (DAF
20) soil screening level (SSL) concentrations as requested by DWMRC. COI concentrations
in groundwater were compared to EPA’s Maximum Contamination Levels (MCLs) for drinking
water and TGC VISLs. COI concentrations in soil vapor were compared to EPA’s TSSNSGC
VISLs. Concentrations of individual COIs in soils, groundwater, and soil vapor exceed these
various screening levels specific to those individual COIs. In addition, the concern existed
that the cumulative effect of all the remaining COIs would present a risk that exceeded the
acceptable target excess carcinogenic risk of 1x10-6 and non-carcinogenic Hazard Index of
1.0. To evaluate the cumulative risk, Terracon utilized EPA’s RSL Calculator and VISL
calculator to evaluate the highest concentrations of COIs remaining on-site. The following
subsections describe the key elements and aspects of the Risk Evaluation.
2.1 Sources, Release Mechanisms, and Affected Media
Based on a Phase I Environmental Site Assessment (Terracon Project Number 61197179,
dated October 2019) conducted on the site, the site has been used industrially since the
early 1900s for machinery repair, steel product manufacturing forging, and large-scale
metal coating and painting. Historically, facilities of this nature have used various chemicals
including chlorinated solvents, petroleum hydrocarbons, acids, and heavy metals, for many
of the activities conducted at the site. Investigations conducted at the site (Phase II
Environmental Site Assessment, Terracon Project 61217496, Limited Site Investigation,
Terracon Project 61207025 dated March 21, 2019, and Supplemental Limited Site
Investigation, Terracon Project 61197179 dated July 15, 2019) found soils, groundwater,
and soil vapor impacted with metals, VOCs, and semi-volatile organic compounds (SVOCs).
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Due to the long-term industrial history across the site, impacts were found in various areas
across the site, and were not contained to one specific source area. Soil COIs and Exposure
Point Concentrations (EPCs) used for risk calculations are listed in Table 1 (Appendix B).
Groundwater COIs and EPCs used for risk calculations are listed in Table 2 (Appendix B).
Soil Vapor COIs and EPCs used for risk calculations are listed in Table 3 (Appendix B).
2.2 Receptors and Routes of Exposure
The current and future use of the site is commercial with no significant renovations to the
current on-site buildings expected in the near future. No subsurface excavation,
construction, or demolition is currently planned for the site. Minor excavations and
landscaping have recently taken place on the site but are not currently planned in the near
future. Any recent excavations have been backfilled with clean fill material and a delineator
fabric has been installed to indicate possible contaminated soil underneath the backfill. In
order to be conservative, this Risk Evaluation uses residential land use to represent the
potential residential receptors. The following routes of exposure were evaluated in this Risk
Evaluation.
Soil Routes of Exposure: Ingestion of soil, inhalation of vapor emissions and particulates,
dermal contact with soil, and leaching to groundwater are the routes of exposure considered
for soils in the Risk Evaluation. These exposure routes are likely to be incomplete pathways
for some receptors since the site is completely covered with concrete and/or asphalt, or
backfilled with clean soil in landscaped areas. However, to provide a conservative evaluation
regarding exposure risks, all routes were included in the Risk Evaluation.
Groundwater Routes of Exposure: Ingestion and dermal contact are the routes of
exposure considered for groundwater in the Risk Evaluation. These exposure routes are
likely to be incomplete pathways since most receptors will not have access to site
groundwater. A pathway for construction workers may be present in the event that future
excavations go below the groundwater table. However, to provide a conservative evaluation
regarding exposure risks, all routes were included in the Risk Evaluation.
Soil Vapor Routes of Exposure: Inhalation of vapor emissions is the source of exposure
considered for soil vapor in the Risk Evaluation.
2.3 Chemicals of Interest
2.3.1 Soils
COIs were identified as those compounds detected above laboratory detection limits.
Nineteen VOCs, 18 SVOCs, and 12 metals were reported above laboratory detection limits in
soil. The list of COIs and EPCs for soil (maximum concentrations) are presented in Table 1
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(Appendix B). Exceedances of the RSLs and DAF-20 screening levels are discussed below
for the various COI types.
VOCs
1,1,2,2-Tetrachloroethane was detected in EB-5 at 12 feet bgs at a concentration of 2.18
mg/kg, exceeding the Residential RSL of 0.6 mg/kg and the DAF 20 SSL of 0.0006 mg/kg.
Tetrachloroethene was detected in X-4 at a depth of 2.5 bgs at a concentration of 0.0551
mg/kg, exceeding the DAF 20 SSL of 0.046 mg/kg. Trichloroethene was detected in IB-3 at
a depth of 3.0 bgs at a concentration of 0.0697 mg/kg, exceeding the DAF 20 SSL of 0.036
mg/kg. Naphthalene was detected in nine soil samples at varying depths at concentrations
exceeding the DAF 20 SSL of 0.0108 mg/kg.
SVOCs
Benzo(a)anthracene and benzo(b)fluoranthene are PAHs. They were both detected at
concentrations exceeding the Residential RSLs and the DAF 20 SSL in IB-2, EB-4, EB-6, X-
10, X-10, and X-2. Benzo(a)anthracene also exceeded the DAF 20 SSL in IB-4-1.5’ and X-6-
2.0’. Benzo(a)pyrene is a PAH detected at concentrations exceeding the Industrial RSL in
IB-2 and X-2 and above the Residential RSL in IB-4, EB-4, EB-6, X-10, and X-6.
Benzo(a)pyrene also exceeds the DAF 20 SSL in IB-2. Dibenz(a,h)anthracene is a PAH
detected at concentrations exceeding the Residential RSL in IB-2, EB-6, X-10, and X-2.
Indeno(1,2,3-CD)pyrene is a PAH detected at concentrations exceeding the residential RSL
in IB-2, EB-4, and X-2.
Metals
Lead was detected at a concentration of 688 mg/kg at a depth of 2.5 feet bgs in soil boring
EB-6 which exceeds the Residential RSL of 400 mg/kg. Lead was also detected at 639, 960,
and 921 mg/kg in samples MW-1 1’, MW-2 2’, and MW-6 1’, respectively during the 2022
investigation with the latter two exceeding the Industrial RSL of 800 mg/kg. These samples
also exceed the DAF 20 SSL of 280 mg/kg.
Arsenic was detected at concentrations exceeding the Industrial RSL in 54 of the 57 soil
samples during the previous investigations. DWMRC has established a background threshold
value for arsenic of 27 mg/kg in Salt Lake County (DWMRC 2023). Most of the reported
values for arsenic fall within the reported background range of up to 27 mg/kg from the
above referenced report, with a few samples slightly above this value. Samples collected
from shallow fill material from EB-6, IB-4, and MW-1 1’ reported concentrations of 171
mg/kg, 106 mg/kg, and 371 mg/kg, respectively, far above the DWMRC background
threshold.
In order to fully determine whether detected arsenic concentrations in soil can be
considered to be typical of background concentrations expected in the surrounding area,
Terracon evaluated five specific sites within an approximately 3-mile radius of this site. In
order to eliminate potential bias, these sites met the following criteria:
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Facilities | Environmental | Geotechnical | Materials 8
Terracon conducted the soil sampling, and the soil sampling was conducted using
the same basic approved environmental techniques and laboratory supplied and
approved containers. Two of the sites were Salt Lake County Brownfields
Assessments Phase II Environmental Assessment sites (Richmond Community
Gardens, Acres ID 242322, October 23, 2020 and Lelis Transmissions, Acres ID
237101, September 30, 2019). Both of these sites also had an approved Quality
Assurance Project Plan detailing the sampling and associated quality controlled
procedures. One of these sites (700 Flatirons, LLC) had an approved Risk Evaluation
conducted at the site where it was agreed that the arsenic concentrations were
within background.
Based on both historical research and Phase I Site Assessments conducted for these
sites, there are no indications that heavy metals were a concern on the site.
There were no significant or widespread exceedances of other metals over
regulatory screening levels other than arsenic.
The results of this comparative investigation are as follows:
The five sites had a range of arsenic concentrations from 3.04 to 41.1 mg/kg. The
range of confirmation arsenic concentrations at the Woodbine site is 1.07 to 59.2
mg/kg (not including the elevated concentrations listed above).
Average arsenic concentration from the five sites is 12.3 mg/kg. Average arsenic
concentration at the Woodbine site is 13.2 mg/kg.
Median arsenic concentration from the four sites is 10.6 mg/kg. Median arsenic
concentration from the Woodbine site is 7.58 mg/kg.
Standard deviation from the five sites is 13.6.
Based on these results, the range of arsenic concentrations at the Woodbine site is well
within the range of four surrounding, non-metal contamination sites sampled by Terracon
and well below the established DWMRC background threshold. Both the average and median
values are well within one standard deviation calculated from these results. Terracon also
did a wide review of numerous other sites within the Salt Lake Valley region and consulted
known literature regarding background arsenic concentration in soil. This evaluation also
indicated that soil samples collected from this site are well within expected background,
with the exception of the elevated concentrations listed above. As a result, the arsenic
concentrations in soil at the Woodbine site can be statistically considered to be in-line with
normal background concentrations. As the concentrations of arsenic appears to be typical of
naturally occurring soils in the area, it was not considered a widespread COI at the site
except in the isolated shallow fill samples with elevated concentrations listed above. Arsenic
was retained as a soil COI for risk evaluation purposes (Table 1).
Cr(VI) was analyzed in 20 soil samples during the 2022 investigation. Seven of these
samples exceeded the Residential RSL and the DAF 20 (but not the Industrial RSL), but
each of these was an estimated value (J value). Because the analytical laboratory cannot
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Woodbine Site | Salt Lake City, Utah
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Facilities | Environmental | Geotechnical | Materials 9
currently provide reporting limits that are below the Residential RSL, J-flagged Cr(VI)
results were utilized in the risk calculations (Section 3.1;Table 1)
Zirconium was analyzed in 44 soil samples and was detected at concentrations exceeding
the residential RSL of 6.3 mg/kg in 41 of those samples.
Selenium was analyzed in all soil samples and was detected at concentrations exceeding the
DAF 20 SSL of 5.2 mg/kg in EB-6, X-4, and MW-1 1’.
Silver was detected in MW-1 1’ at 17.8 mg/kg, exceeding the DAF 20 SSL of 16 mg/kg.
Mercury was detected in MW-1 1’ at 2.12 mg/kg, exceeding the DAF 20 SSL of 2 mg/kg.
Table 1 (Appendix B) lists the COIs for soil and the maximum concentrations detected at
the site.
2.3.2 Groundwater
Trichloroethene (TCE) was detected at concentrations exceeding the EPA MCL and TGC VISL
for Residential and Commercial sites in sample IB-3, and exceeding the EPA MCL and TGC
VISL for Residential sites in sample X-4. Benzo(a)pyrene, a PAH, was detected at
concentrations exceeding the EPA MCL in IB-2. Dissolved arsenic was detected at
concentrations exceeding the EPA MCL in fifteen of the twenty groundwater samples in
which dissolved RCRA 8 Metals analysis was performed.Table 2 (Appendix B) lists the
COIs and EPCs for groundwater (maximum concentrations).
2.3.3 Soil Vapor
Benzene was detected at a concentration exceeding the residential EPA TSSNSGC VISL in X-
9-SSGP. Bromodichloromethane was detected at a concentration exceeding the residential
EPA TSSNSGC VISL in X-5-SSGP. Chloroform was detected at a concentration exceeding the
residential and commercial EPA TSSNSGC VISLs in X-5-SSGP, and at concentrations
exceeding the residential EPA TSSNSGC VISL in X-7-SSGP and X-9-SSGP. TCE was detected
at concentrations exceeding the residential and commercial EPA TSSNSGC VISLs in SSGP-3
and X-5-SSGP, and at a concentration exceeding the residential EPA TSSNSGC VISL in X-7-
SSGP. Table 3 (Appendix B) lists the COIs and EPCs for soil vapor (maximum
concentrations).
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Facilities | Environmental | Geotechnical | Materials 10
3.0 RSL and VISL Calculator
3.1 RSL Calculator Data Inputs
Parameter Input
Screening
Level Type
Regional Screening Levels (RSLs)
Hazard Index 1.0—was selected at the direction of Utah Department of Environmental
Quality (UDEQ) to evaluate cumulative the non-cancer risk posed by
COIs at the site.
Target Risk 10-6 (i.e., one in one million)—was selected at the direction of UDEQ to
evaluate the cumulative cancer risk posed by COIs at the site.
Scenario Resident—To be conservative, the Resident was initially selected as the
receptor (see Section 2.2). Other scenarios were also run for indoor
worker, outdoor worker, and construction worker.
Media The RSL calculator was run for soil and tap water media.
Screening
Level Choice
Site Specific inputs were selected, as required by the next choice “Risk
Output.” Within this parameter the option “Database Hierarchy Defaults”
was selected.
Risk Output Risk Output was affirmative as this directs the RSL Calculator to present
site-specific risk posed by each individual COI and the cumulative risk.
RfD/RdC
Choice
Chronic
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Woodbine Site | Salt Lake City, Utah
September 7, 2023 | Terracon Project No. 61197179
Facilities | Environmental | Geotechnical | Materials 11
Parameter Input
Chemicals Soils—the COIs identified for soil at the site were entered in this
section, as discussed in Section 2.3.1 and listed in Table 1 (Appendix
B).
Tap Water—the COIs identified for groundwater at the site were
entered in this section, as discussed in Section 2.3.2 and listed in Table
2 (Appendix B).
Particulate
Emission
Factor Wind
Driven
The calculator allows for the selection of selected site-specific
parameters, based on guidance from the updated Supplemental
Guidance for Developing Soil Screening Levels for Superfund Sites (EPA,
2002). For the City—Salt Lake City was selected as the Climatic Zone.
Volatilization
Factor and
Soil Saturation
The calculator allows for the selection of selected site-specific
parameters, based on guidance from the updated Supplemental
Guidance for Developing Soil Screening Levels for Superfund Sites (EPA,
2002). For the City—Salt Lake City was selected as the Climatic Zone.
Volatilization
Factor—Mass
Limit
As noted above, based on EPA guidance, and site-specific parameters
selected in this section (EPA 2002).
Average source depth (dS)– 1.5 meters (5 feet) was the average depth
of all samples collected from the site.
City—Salt Lake City was selected as the Climatic Zone.
Terracon also input the concentrations of all soil and tap water COIs. All other parameters
were default parameters associated with the options described above, except where
indicated.
3.2 VISL Calculator Data Inputs
Soil vapor risks were calculated using the EPA VISL Calculator following the parameters
listed below:
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Woodbine Site | Salt Lake City, Utah
September 7, 2023 | Terracon Project No. 61197179
Facilities | Environmental | Geotechnical | Materials 12
Parameter Input
Screening
Level Type
VISLs
Hazard
Quotient
1.0—was selected at the direction of Utah DEQ to evaluate cumulative
the non-cancer risk posed by COIs at the site.
Target Risk 10-6 (i.e., one in one million)—was selected at the direction of UDEQ to
evaluate the cumulative cancer risk posed by COIs at the site.
Scenario Resident—To be conservative, the Resident was initially selected as the
receptor (see Section 2.2). Another scenario was also run for
Commercial.
Media The calculator was run for Site Sub-slab or Near-source Soil Gas
Screening
Level Choice
Site Specific inputs was selected, as required by the next choice, “Risk
Output.” Within this parameter the option “Database Hierarchy Defaults”
was selected.
Risk Output Risk Output was affirmative as this directs the RSL Calculator to present
site-specific risk posed by each individual COI and the cumulative risk.
RfD/RdC
Choice
Chronic
Chemicals Soil Vapor—The COIs identified for soil vapor at the site were entered
in this section, as discussed in Section 2.3.3 and listed in Table 3
(Appendix B).
Terracon also input the concentrations of all soil vapor COIs. All other parameters were
default parameters associated with the options described above, except where indicated.
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Woodbine Site | Salt Lake City, Utah
September 7, 2023 | Terracon Project No. 61197179
Facilities | Environmental | Geotechnical | Materials 13
3.3 Results of the Onsite Risk Evaluation
The following table summarizes the results from the EPA’s software for the Residential
Scenario.
Carcinogenic Risk Non-Carcinogenic Hazard Index
Soil=6.28 x 10-4 Soil (Adult)=2.35 Soil (Child)=21.5
Tap water=2.66 x 10-3 Tap water (Adult)=16.6 Tap water (Child)=25.9
Soil vapor (VISL)=7.27 x
10-5
Soil vapor (VISL)=5.83 Not Applicable1
Sum of Soil, Tap water,
Soil vapor=3.36 x 10-3
Sum of Soil, Tap water,
Soil vapor (Adult)=24.8
Sum of Soil, Tap water
(Child)=47.4
The cumulative non-carcinogenic hazard posed by the remaining chemicals at the site for an
adult is 24.8 and 47.4 for a child. These calculated hazard indices exceed the target Hazard
Index of 1. As summarized above, the cumulative carcinogenic risk posed by the remaining
chemicals at the site is 3.36 x 10-3, exceeding the target excess cancer risk identified for the
site of 1 x 10-6.
The scenario was run for the Indoor Worker (Commercial). A cumulative carcinogenic risk
and Hazard Index are shown below.
1 US EPA VISL calculator does not provide child-specific non-carcinogenic Hazard Index
calculations.
Revised Risk Evaluation
Woodbine Site | Salt Lake City, Utah
September 7, 2023 | Terracon Project No. 61197179
Facilities | Environmental | Geotechnical | Materials 14
Carcinogenic Risk Non-Carcinogenic Hazard Index
Soil=5.31 x 10-5 Soil (Adult)=0.729
Soil vapor=1.51 x 10-5 Soil vapor (Adult)=1.39
Sum of Soil, Soil vapor=6.82 x 10-5 Sum of Soil, Soil vapor (Adult)=2.12
The following table summarizes the results from the EPA’s software for the Outdoor Worker
Scenario.
Carcinogenic Risk Non-Carcinogenic Hazard Index
Soil=1.16 x 10-4 Soil (Adult)=1.40
The following table summarizes the results from the EPA’s software and the Virginia Unified
Risk Assessment Model (VURAM) for the Construction Worker Scenario.
Carcinogenic Risk Non-Carcinogenic Hazard Index
Soil=1.88 x 10-5 Soil (Adult)=7.26
Soil vapor=7.46 x 10-8 Soil vapor (Adult in Trench)=0.149
Appendix C contains the input and output information from the EPA and VURAM software.
A target organ analysis was conducted for all exposure scenarios where the cumulative non-
carcinogenic Hazard Index exceeded 1 (Resident Soil, Outdoor Worker Soil, Construction
Worker Soil, Resident Groundwater, Resident Soil Vapor, Commercial Indoor Worker Soil
Vapor). The target organ analysis results are presented in Table 4 through Table 9
(Appendix B). Due to the large number of COIs present, the target organ analysis
excluded COIs with a Hazard Index of <0.1. The cumulative risk for the remaining COIs is
insufficient to impact the target organ analysis results (i.e., even if the remaining COIs all
impacted the same organ system, the amount of calculated risk is insufficient to increase
any of the organ-specific Hazard Indexes from <1 to >1). Target organ analysis reduced the
organ-specific Hazard Indexes to <1 for the Outdoor Worker Soil exposure scenario. For all
other exposure scenarios (Resident Soil, Construction Worker Soil, Resident Groundwater,
Revised Risk Evaluation
Woodbine Site | Salt Lake City, Utah
September 7, 2023 | Terracon Project No. 61197179
Facilities | Environmental | Geotechnical | Materials 15
Resident Soil Vapor, Commercial Indoor Worker Soil Vapor) the organ-specific Hazard
Indexes remained >1.
The scenarios listed above are for comparison and worst-case scenario purposes assuming
no controls are in place (i.e., complete exposure pathways for future residents with no
controls for exposure to impacted soil and groundwater). As such, this evaluation results in
highly conservative risk estimates.
3.4 Soil-To-Groundwater Pathway Evaluation
Fifteen of the soil COIs exceeded DAF 20 groundwater protection SSLs. Multiple lines of
evidence indicate that soil contamination is unlikely to impact groundwater.
Soil contamination is exclusively present in shallow fill soils above the water table.
The vast majority of the site is covered by concrete and asphalt which serves to
limit infiltration.
Subsurface native soils consist of low-permeability clays and silty clays. All
monitoring wells purged dry during development.
Of the fifteen soil COIs that exceed DAF 20 SSLs, only two exceeded MCLs in
groundwater (arsenic and benzo(a)pyrene) and none exceeded VISL TGCs.
Groundwater dissolved arsenic concentrations reported at 20–30 feet bgs were
similar to those reported in groundwater at 10–15 feet bgs. If arsenic was leaching
from shallow fill soils to groundwater it would be expected that arsenic
concentrations would be higher in the 10–15 feet bgs interval than the 20-30 feet
bgs interval. Further, dissolved arsenic concentrations reported in groundwater at
10–15 feet bgs appear to be naturally occurring.
Groundwater is not impacted above MCLs by any other metals.
Benzo(a)pyrene) exceeded the MCL at only one sampling location.
4.0 Ecological Risk Assessment
The site was fully developed with commercial and residential buildings as early as 1911. The
site is in a developed commercial area. No surface water bodies are located on the site or
adjoining properties. The current and future use of the site is commercial with no significant
renovations to the current on-site buildings expected in the near future. As such, the site is
not a viable habitat and cannot be used by potential ecological receptors as a habitat. Per
Utah Administrative Code R315-101-5(j)(3), an Application for a Waiver of an Ecological
Risk Assessment has been prepared and is included as Appendix D.
Revised Risk Evaluation
Woodbine Site | Salt Lake City, Utah
September 7, 2023 | Terracon Project No. 61197179
Facilities | Environmental | Geotechnical | Materials 16
5.0 Conclusion
Calculated site risks currently exceed R315-101 thresholds. However, because the site is
currently fully developed, remediation of source materials to reduce site risks will require
demolition of existing buildings and is only economically and practicably feasible if
conducted concurrently with redevelopment. Preparation of a Site Management Plan and
Environmental Covenant is recommended as an interim measure to mitigate existing risks
to the greatest degree practicable until remediation can be conducted concurrently with
redevelopment. The Site Management Plan and Environmental Covenant should outline
continuing obligations and land use limitations associated with the site to protect the site’s
current commercial/industrial users and construction workers from impacts present at the
site. The site owner is well informed that future redevelopment will require a Corrective
Action Plan and remediation to address the site risks currently present.
6.0 References
Terracon 2019a. Phase I Environmental Site Assessment, Mixed Use Redevelopment, 534,
540, 545, 549, and 585 West 700 South, Salt Lake City, Salt Lake County, Utah.
March 21.
Terracon 2019b. Limited Site Investigation, Mixed Use Redevelopment, 534, 540, 545, 549,
and 585 West 700 South, Salt Lake City, Salt Lake County, Utah.June 24.
Terracon 2021. Limited Contamination Assessment Report, Ameritech Coatings, Inc. 534
West 800 South, Salt Lake City, Utah, Salt Lake County, Utah.January 14.
Terracon 2022. Phase II Environmental Site Assessment, Salt Lake Brownfields Assessment;
EPA Cooperative Agreement No. 95811800, Proposed Woodbine Mixed Use
Redevelopment, 545 West 700 South, Salt Lake City, Salt Lake County, Utah,
November 22.
United States Environmental Protection Agency, Soil Screening Guidance: Technical
Background Document, 1996.
United States Environmental Protection Agency, Supplemental Guidance for Developing Soil
Screening Levels for Superfund Sites, 2002.
United States Environmental Protection Agency, Regional Screening Levels for Chemical
Contaminants at Superfund Sites;https://epa-prgs.ornl.gov/cgi-
bin/chemicals/csl_search.
Utah Department of Environmental Quality, Division of Waste Management and Radiation
Control (DWMRC), Technical Guide for Risk Assessments: Utah Administrative Code
R315-101, 2023.
Appendix A Exhibits
Exhibit 1 Site Topographic Map
Exhibit 2 Site Diagram
Exhibit 3 Conceptual Site Model
TOPOGRAPHIC MAP
Woodbine Site
534, 540, 545, 549, and 585 West 700 South
Salt Lake City, UT
TOPOGRAPHIC MAP IMAGE COURTESY OF THE U.S. GEOLOGICAL SURVEY
QUADRANGLES INCLUDE: SALT LAKE CITY NORTH, UT (1/1/1998) and SALT LAKE CITY SOUTH, UT (1/1/1999).
6949 S High Tech Dr, Ste 100
Midvale, UT 84047-3707
61197179
Project Manager:
Drawn by:
Checked by:
Approved by:
AT
BBB
BBB
1”=2,000’
Ex 1 & 2
March 2021
Project No.
Scale:
File Name:
Date:
1
ExhibitAT
APPROXIMATE
SITE BOUNDARY
540 & 549 W 800 S:
Eco Box Fabricators
Office
543 W 800 S:
Ameritech Coatings
585 W 800 S:
Watts Fabrication
700 South
800 South
600 West
SITE DIAGRAM
Woodbine Site
534, 540, 545, 549, and 585 West 700 South
Salt Lake City, UT6949 S High Tech Dr, Ste 100
Midvale, UT 84047-3707
DIAGRAM IS FOR GENERAL LOCATION ONLY, AND IS
NOT INTENDED FOR CONSTRUCTION PURPOSES
61197179
AERIAL PHOTOGRAPHY PROVIDED
BY MICROSOFT BING MAPS
AT
BBB
BBB
AS SHOWN
Ex 1 & 2
March 2021
Scale:
2
ExhibitProject Manager:
Drawn by:
Checked by:
Approved by:
Project No.
File Name:
Date:
AT
545 W 700 S:
Rico’s and Frida’s
APPROXIMATE
SITE BOUNDARY
Fill:
Metals: Arsenic, Cadmium,
Hexavalent Chromium, Lead
SVOCs
Soil Gas
Groundwater:
Arsenic
Trichloroethene
Benzo(A)Pyrene
Groundwater
Native Soil:
1,1,2,2-Tetrachloroethane
Soil Gas:
Benzene
Bromodichloromethane
Chloroform
Trichloroethene
Construction
Worker
Dermal Contact
Ingestion
Inhalation
CONCEPTUAL SITE MODEL
6949 S High Tech Drive
Midvale, Utah 84047
61197179
Employee Resident
Current Use/Future Use
Woodbine Site
534, 540, 545, 549, and 585 West 700 South
Salt Lake City, Utah
Project Manager:
Drawn by:
Checked by:
Approved by:
AST
AA
AA
DD
Exhibit3
June 2023
Scale:
Project No.
File Name:
Date:
none 3
Exhibit
RECEPTORS
Complete pathway
Incomplete pathway
Fill
Soil
Dermal Contact
SOURCE INTERACTION
Contamination
Exposure
Medium
Exposure
Route
Ingestion
Appendix B Tables
Table 1 Soil Exposure Point Concentrations
Table 2 Groundwater Exposure Point Concentrations
Table 3 Soil Vapor Exposure Point Concentrations
Table 4 Resident Soil Target Organ Analysis
Table 5 Outdoor Worker Soil Target Organ Analysis
Table 6 Construction Worker Soil Target Organ Analysis
Table 7 Resident Groundwater Target Organ Analysis
Table 8 Resident Soil Vapor Target Organ Analysis
Table 9 Commercial Indoor Worker Soil Vapor Target Organ Analysis
Compound of Interest (COI)
EPA Residential RSL
(mg/kg)
EPA Industrial RSL
(mg/kg)
DAF 20 Groundwater
(mg/kg)
Arsenic 0.68 3 5.8 371
Barium 15000 220000 1640 600
Cadmium 7.1 100 7.6 12.1
Total Chromium NE NE 3600000 26.4
Chromium, Trivalent 120000 1800000 800000000 36.5
Hexavalent Chromium 0.3 6.3 0.0134 0.938
Copper 3100 47000 920 703
Lead 400 800 280 960
Selenium 390 5800 5.2 18.2
Silver 390 5800 16 17.8
Zinc 23000 350000 7400 343
Mercury 11 46 2 2.12
Zirconium 6.3 93 96 51.7
Acetone 61000 670000 58 0.0925
Benzene 1.2 5.1 0.052 0.0215
Tert-Butylbenzene 7800 120000 32 0.00784
1,4-Dichlorobenzene 2.6 11 0.072 0.00355
Ethylbenzene 5.8 25 15.6 0.0289
Isopropylbenzene (Cumene)1900 9900 14.8 0.00448
P-Isopropyltoluene NE NE NE 0.0252
2-Butalone (MEK)27000 190000 24 0.0317
Naphthalene 3.8 17 0.0108 0.124
Volatile Organic Compounds (VOCs)
Exposure Point Concentration
(mg/kg)
TABLE 1 - SOIL EXPOSURE POINT CONCENTRATIONS
Woodbine Site
Salt Lake City, Utah
Terracon Project No. 61197179
Metals
Compound of Interest (COI)
EPA Residential RSL
(mg/kg)
EPA Industrial RSL
(mg/kg)
DAF 20 Groundwater
(mg/kg)
Exposure Point Concentration
(mg/kg)
TABLE 1 - SOIL EXPOSURE POINT CONCENTRATIONS
Woodbine Site
Salt Lake City, Utah
Terracon Project No. 61197179
N-Propylbenzene 3800 24000 14.8 0.00431
1,1,2,2,-Tetrachloroethane 0.6 2.7 0.0006 2.18
Tetrachloroethene 24 100 0.046 0.0551
Toluene 4900 47000 13.8 0.136
1,2,4-Trichlorobenzene 24 110 4 0.00667
Trichloroethene 0.94 6 0.036 0.0697
1,2,4-Trimethylbenzene 300 1800 1.62 0.0434
1,2,3-Trimethylbenzene 340 2000 1.62 0.0408
1,3,5-Trimethylbenzene 270 1500 1.74 0.028
Total Xylenes 580 2500 198 0.148
Acenaphthene 3600 45000 110 3.12
Acenapthtylene NE NE NE 1.11
Anthracene 18000 230000 1160 2.99
Benzo(a)anthracene 1.1 21 0.22 6.79
Benzo(b)fluoranthene 1.1 21 6 6.69
Benzo(k)fluoranthene 11 210 58 2.42
Benzo(g,h,i)perylene NE NE NE 3.08
Benzo(a)pyrene 0.11 2.1 4.8 5.97
Chrysene 110 2100 180 6.93
Dibenz(a,h)anthracene 0.11 2.1 1.92 0.786
Fluoranthene 2400 30000 1780 14.9
Fluorene 2400 30000 108 4.06
Indeno(1,2,3-cd)pyrene 1.1 21 19.6 3.41
Naphthalene 3.8 17 0.0108 0.524
Semi Volatile Organic Compounds (SVOCs)
Compound of Interest (COI)
EPA Residential RSL
(mg/kg)
EPA Industrial RSL
(mg/kg)
DAF 20 Groundwater
(mg/kg)
Exposure Point Concentration
(mg/kg)
TABLE 1 - SOIL EXPOSURE POINT CONCENTRATIONS
Woodbine Site
Salt Lake City, Utah
Terracon Project No. 61197179
Phenanthrene NE NE NE 10.9
Dimethyl Phthalate NE NE NE 0.0181
Pyrene 1800 23000 260 14.6
Phenol 19000 250000 66 0.0971
COI EPCs are the maximum detected concentrations
NE = screening level not established
EPA RSL THQ 1_0 Residential Soil
EPA RSL THQ 1_0 Industrial Soil
DAF 20 Groundwater Protection SSL
Compound of Interest ( COI)
EPA Residential VISL
(mg/l)
EPA Commercial VISL
(mg/l)EPA MCL
Arsenic NE NE 0.01 0.13
Barium NE NE 2 0.33
Total Chromium NE NE 0.1 0.0014
Lead NE NE 0.015 0.00771
Selenium NE NE 0.05 0.0146
Benzene 0.00159 0.00693 0.005 0.000462
N-Butylbenzene NE NE NE 0.00103
Sec-Butylbenzene NE NE NE 0.00146
Tert-Butylbenzene NE NE NE 0.0014
1,1-Dichloroethane 0.00764 0.0334 NE 0.000469
Cis-1,2-Dichloroethene NE NE 0.07 0.00524
P-Isopropyltoluene NE NE NE 0.000521
Trans-1,2-Dichloroethene NE NE 0.1 0.00128
Toluene 19.2 80.7 1 0.000723
Trichloroethene 0.00119 0.00743 0.005 0.00911
1,2,4-Trichlorobenzene 0.0359 0.151 0.07 0.000415
1,2,3-Trimethylbenzene 0.351 1.47 NE 0.000764
Total Xylenes 0.385 1.62 10 0.00181
Acenaphthene NE NE NE 0.0104
Acenapthtylene NE NE NE 0.000342
Anthracene NE NE NE 0.00217
Volatile Organic Compounds (VOCS)
Semi Volatile Organic Compounds (SVOCs)
Metals
TABLE 2 - GROUNDWATER EXPOSURE POINT CONCENTRATIONS
Woodbine Site
Salt Lake City, Utah
Terracon Project No. 61197179
Exposure Point Concentration
(mg/L)
Compound of Interest ( COI)
EPA Residential VISL
(mg/l)
EPA Commercial VISL
(mg/l)EPA MCL
TABLE 2 - GROUNDWATER EXPOSURE POINT CONCENTRATIONS
Woodbine Site
Salt Lake City, Utah
Terracon Project No. 61197179
Exposure Point Concentration
(mg/L)
Benz(a)anthracene 34.4 417 NE 0.00161
Benzo(b)fluoranthene NE NE NE 0.00172
Benzo(g,h,i)perylene NE NE NE 0.000928
Benzo(a)pyrene NE NE 0.0002 0.00145
Chrysene NE NE NE 0.00186
Fluoranthene NE NE NE 0.00298
Fluorene NE NE NE 0.0107
Indeno(1,2,3-cd)pyrene NE NE NE 0.000852
Naphthalene 0.00459 0.0201 NE 0.000499
Phenanthrene NE NE NE 0.00171
Di-n-Butyl-Phthalate NE NE NE 0.000302
Diethyl Phthalate NE NE NE 0.000282
Dimethyl Phthalate NE NE NE 0.00311
Pyrene NE NE NE 0.00323
Phenol NE NE NE 0.00442
NE = screening level not established
EPA Residential VISL THQ 1_0
EPA Commercial VISL THQ 1_0
EPA RSL THP 1_0 MCL
Compound of Interest ( COI)
EPA Residential VISL
(µg/m3)
EPA Commercial VISL
(µg/m3)
ACETONE 1070000 4510000
BENZENE 12 52.4
BROMODICHLOROMETHANE 2.53 11
CARBON DISULFIDE 24300 102000
CHLOROFORM 4.07 17.8
1,1-DICHLOROETHANE 58.5 256
CIS-1,2-DICHLOROETHENE NE NE
TRANS-1,2-DICHLOROETHENE NE NE
ETHANOL NE NE
ETHYLBENZENE 37.4 164
HEPTANE 13900 58400
N-HEXANE 24300 102000
METHYLENE CHLORIDE 3380 40900
2-BUTANONE (MEK)174000 730000
2-PROPANOL 6950 29200
PROPENE 104000 438000
STYRENE 34800 146000
TETRACHLOROETHENE 360 1570
TETRAHYDROFURAN 69500 292000
TOLUENE 174000 730000
1,1,1-TRICHLOROETHANE 174000 730000
TRICHLOROETHENE 15.9 99.7
1,2,4-TRIMETHYLBENZENE 2090 8760
M&P-XYLENE 3480 14600
O-XYLENE 3480 14600
NE = screening level not established
µg/m3 = micrograms per cubic meter
EPA Residential VISL THQ 1_0
EPA Industrial/Commercial VISL THQ 1_0
800
386
5.51
31
7
36.6
46
8.0
4.35
5.13
7.23
20
21.9
4.7
3.91
7.42
5.96
5.1
92.2
160
TABLE 3 - SOIL VAPOR EXPOSURE POINT CONCENTRATIONS
Woodbine Site
Salt Lake City, Utah
Terracon Project No. 61197179
Exposure Point Concentration
(µg/m3)
45.3
15.4
9.72
6.5
178
Compound of Interest (COI)
EPC1
(mg/kg) Target Organ Systems
Non-Cancer RSL
(mg/kg)
Non-Cancer
Hazard Index
Arsenic 371 Cardiovascular, Dermal 0.68 1.08
Cadmium 12.1 Urinary 7.1 0.17
Mercury 2.12 Developmental, Nervous 11 0.245
Zirconium 51.7 Respiratory 6.3 0.775
0.08
Total Non-Cancer HI:2.35
Cardiovascular HI:1.08
Dermal HI:1.08
Developmental HI:0.245
Nervous HI:0.245
Respiratory HI:0.775
Urinary HI:0.17
1 - COI EPCs are the maximum detected concentrations.
RSL = Resident (Target Cancer Risk = 1E-06 and Target Hazard Quotient = 1.0)
mg/kg = milligrams per kilogram
USEPA Integrated Risk Information System (IRIS) was consulted for target organ groups.
Other2
2 - All other COIs have HIs <0.1. See Table 1 for complete list of soil COI EPCs. Listed COI EPCs account for
97% of total non-cancer risk.
TABLE 4 - RESIDENT SOIL TARGET ORGAN ANALYSIS
Woodbine Site
Salt Lake City, Utah
Terracon Project No. 61197179
Compound of Interest (COI)
EPC1
(mg/kg) Target Organ Systems
Non-Cancer RSL
(mg/kg)
Non-Cancer
Hazard Index
Arsenic 371 Cardiovascular, Dermal 3 0.694
Cadmium 12.1 Urinary 100 0.109
Zirconium 51.7 Respiratory 93 0.498
0.099
Total Non-Cancer HI:1.4
Cardiovascular HI:0.694
Dermal HI:0.694
Respiratory HI:0.498
Urinary HI:0.109
1 - COI EPCs are the maximum detected concentrations.
RSL = Composite Worker (Target Cancer Risk = 1E-06 and Target Hazard Quotient = 1.0)
mg/kg = milligrams per kilogram
USEPA Integrated Risk Information System (IRIS) was consulted for target organ groups.
2 - All other COIs have HIs <0.1. See Table 1 for complete list of soil COI EPCs. Listed COI EPCs account for
95% of total non-cancer risk.
TABLE 5 - OUTDOOR WORKER SOIL TARGET ORGAN ANALYSIS
Woodbine Site
Salt Lake City, Utah
Terracon Project No. 61197179
Other2
Compound of Interest (COI)
EPC1
(mg/kg) Target Organ Systems
Non-Cancer RSL
(mg/kg)
Non-Cancer
Hazard Index
Arsenic 371 Cardiovascular, Dermal 3 2.55
Mercury 2.12 Developmental, Nervous 46 2.47
Zirconium 51.7 Respiratory 93 1.9
0.34
Total Non-Cancer HI:7.26
Cardiovascular HI:2.55
Dermal HI:2.55
Developmental HI:2.47
Nervous HI:2.47
Respiratory HI:1.9
1 - COI EPCs are the maximum detected concentrations.
RSL = Composite Worker (Target Cancer Risk = 1E-06 and Target Hazard Quotient = 1.0)
mg/kg = milligrams per kilogram
USEPA Integrated Risk Information System (IRIS) was consulted for target organ groups.
2 - All other COIs have HIs <0.1. See Table 1 for complete list of soil COI EPCs. Listed COI EPCs account for
95% of total non-cancer risk.
TABLE 6 - CONSTRUCTION WORKER SOIL TARGET ORGAN ANALYSIS
Woodbine Site
Salt Lake City, Utah
Terracon Project No. 61197179
Other2
Compound of Interest (COI)
EPC1
(mg/L)Target Organ Systems
Non-Cancer RSL
(mg/L)
Non-Cancer
Hazard Index
Arsenic 0.13 Cardiovascular, Dermal 0.01 13.1
Benzo(a)pyrene 0.00145 Developmental, Immune 0.0002 0.145
Cis-1,2-Dichloroethene 0.00524 Urinary 0.07 0.151
1,2,4-Trichlorobenzene 0.000415 Endocrine 0.07 0.102
Trichloroethene 0.00911 Developmental, Immune 0.00119 2.82
0.282
Total Non-Cancer HI:16.6
Cardiovascular HI:13.1
Dermal HI:13.1
Developmental HI:2.965
Endocrine HI:0.102
Immune HI:2.965
Urinary HI:0.151
1 - COI EPCs are the maximum detected concentrations.
RSL = MCL or Resident VISL TGC (Target Cancer Risk = 1E-06 and Target Hazard Quotient = 1.0)
mg/L = milligrams per liter
USEPA Integrated Risk Information System (IRIS) was consulted for target organ groups.
2 - All other COIs have HIs <0.1. See Table 2 for complete list of groundwater COI EPCs. Listed COI
EPCs account for 98% of total non-cancer risk.
TABLE 7 - RESIDENT GROUNDWATER TARGET ORGAN ANALYSIS
Woodbine Site
Salt Lake City, Utah
Terracon Project No. 61197179
Other2
Compound of Interest (COI)
EPC1
(µg/m3)Target Organ Systems
Non-Cancer RSL
(µg/m3)
Non-Cancer
Hazard Index
Trans-1,2-Dichloroethene 160 Immune NE 0.115
Trichloroethene 386 Developmental, Immune 15.9 5.55
0.165
Total Non-Cancer HI:5.83
Developmental HI:5.55
Immune HI:5.665
1 - COI EPCs are the maximum detected concentrations.
RSL = Resident VISL TSSNSGC (Target Cancer Risk = 1E-06 and Target Hazard Quotient = 1.0)
µg/m3 = micrograms per cubic meter
NE = Not Established
USEPA Integrated Risk Information System (IRIS) was consulted for target organ groups.
2 - All other COIs have HIs <0.1. See Table 3 for complete list of soil vapor COI EPCs. Listed COI
EPCs account for 97% of total non-cancer risk.
TABLE 8 - RESIDENT SOIL VAPOR TARGET ORGAN ANALYSIS
Woodbine Site
Salt Lake City, Utah
Terracon Project No. 61197179
Other2
Compound of Interest (COI)
EPC1
(µg/m3)Target Organ Systems
Non-Cancer RSL
(µg/m3)
Non-Cancer
Hazard Index
Trichloroethene 386 Developmental, Immune 15.9 1.32
0.07
Total Non-Cancer HI:1.39
Developmental HI:1.32
Immune HI:1.32
1 - COI EPCs are the maximum detected concentrations.
RSL = Commercial VISL TSSNSGC (Target Cancer Risk = 1E-06 and Target Hazard Quotient = 1.0)
µg/m3 = micrograms per cubic meter
NE = Not Established
USEPA Integrated Risk Information System (IRIS) was consulted for target organ groups.
2 - All other COIs have HIs <0.1. See Table 3 for complete list of soil vapor COI EPCs. Listed COI
EPCs account for 95% of total non-cancer risk.
TABLE 9 - COMMERCIAL INDOOR WORKER SOIL VAPOR TARGET ORGAN ANALYSIS
Woodbine Site
Salt Lake City, Utah
Terracon Project No. 61197179
Other2
Appendix C Risk Evaluation Input and Output Sheets
Output generated 24AUG2023:16:52:09
Resident Air Inputs 1
Variable
Resident
Air
Default
Value
Site-Specific
Value
AFgw (Attenuation Factor Groundwater) unitless 0.001 0.001
AFss (Attenuation Factor Sub-Slab) unitless 0.03 0.03
EDres (exposure duration) years 26 26
ED0-2 (mutagenic exposure duration first phase) years 2 2
ED2-6 (mutagenic exposure duration second phase) years 4 4
ED6-16 (mutagenic exposure duration third phase) years 10 10
ED16-26 (mutagenic exposure duration fourth phase) years 10 10
EFres (exposure frequency) days/year 350 350
EF0-2 (mutagenic exposure frequency first phase) days/year 350 350
EF2-6 (mutagenic exposure frequency second phase) days/year 350 350
EF6-16 (mutagenic exposure frequency third phase) days/year 350 350
EF16-26 (mutagenic exposure frequency fourth phase) days/year 350 350
ETres (exposure time) hours/day 24 24
ET0-2 (mutagenic exposure time first phase) hours/day 24 24
ET2-6 (mutagenic exposure time second phase) hours/day 24 24
ET6-16 (mutagenic exposure time third phase) hours/day 24 24
ET16-26 (mutagenic exposure time fourth phase) hours/day 24 24
THQ (target hazard quotient) unitless 0.1 1
LT (lifetime) years 70 70
TR (target risk) unitless 1.0E-06 1.0E-06
Output generated 24AUG2023:16:52:09
Resident Vapor Intrusion Screening Levels (VISL)2
Key: I = IRIS; P = PPRTV; O = OPP; A = ATSDR; C = Cal EPA; X = PPRTV Screening Level; H = HEAST; D = DWSHA; W = TEF applied; E = RPF applied;
U = user provided; G = see RSL User's Guide Section 5; CA = cancer; NC = noncancer.
Chemical
CAS
Number
Does the
chemical
meet
the
definition
for
volatility?
(HLC>1E-5
or VP>1)
Does the
chemical
have
inhalation
toxicity
data?
(IUR
and/or
RfC)
Is Chemical
Sufficiently
Volatile and Toxic
to
Pose Inhalation
Risk
Via Vapor
Intrusion
from Soil
Source?
(Cvp > C i,a,Target?)
Is Chemical
Sufficiently
Volatile and Toxic
to
Pose Inhalation
Risk
Via Vapor
Intrusion from
Groundwater
Source?
(Chc > C i,a,Target?)
Target
Indoor Air
Concentration
(TCR=1E-06
or THQ=1)
MIN(Cia,c,Cia,nc )
(µg/m 3)
Toxicity
Basis
Target
Sub-Slab and
Near-source
Soil Gas
Concentration
(TCR=1E-06
or THQ=1)
Csg ,Target
(µg/m 3)
Target
Groundwater
Concentration
(TCR=1E-06
or THQ=1)
Cgw ,Target
(µg/L)
Acetone 67-64-1 Yes No No Inhal. Tox. Info No Inhal. Tox. Info ---
Benzene 71-43-2 Yes Yes Yes Yes 3.60E-01 CA 1.20E+01 2.46E+00
Bromodichloromethane 75-27-4 Yes Yes Yes Yes 7.59E-02 CA 2.53E+00 1.40E+00
Carbon Disulfide 75-15-0 Yes Yes Yes Yes 7.30E+02 NC 2.43E+04 1.77E+03
Chloroform 67-66-3 Yes Yes Yes Yes 1.22E-01 CA 4.07E+00 1.22E+00
Dichloroethane, 1,1-75-34-3 Yes Yes Yes Yes 1.75E+00 CA 5.85E+01 1.14E+01
Dichloroethylene, cis-1,2-156-59-2 Yes Yes Yes Yes 4.17E+01 NC 1.39E+03 3.80E+02
Dichloroethylene, trans-1,2-156-60-5 Yes Yes Yes Yes 4.17E+01 NC 1.39E+03 1.61E+02
Ethanol 64-17-5 Yes No No Inhal. Tox. Info No Inhal. Tox. Info ---
Ethylbenzene 100-41-4 Yes Yes Yes Yes 1.12E+00 CA 3.74E+01 6.09E+00
Heptane, N-142-82-5 Yes Yes Yes Yes 4.17E+02 NC 1.39E+04 8.30E+00
Hexane, N-110-54-3 Yes Yes Yes Yes 7.30E+02 NC 2.43E+04 1.50E+01
Isopropanol 67-63-0 Yes Yes Yes Yes 2.09E+02 NC 6.95E+03 1.16E+06
Methyl Ethyl Ketone (2-Butanone)78-93-3 Yes Yes Yes Yes 5.21E+03 NC 1.74E+05 3.54E+06
Methylene Chloride 75-09-2 Yes Yes Yes Yes 1.01E+02 CA 3.38E+03 1.11E+03
Propylene 115-07-1 Yes Yes Yes Yes 3.13E+03 NC 1.04E+05 4.66E+02
Styrene 100-42-5 Yes Yes Yes Yes 1.04E+03 NC 3.48E+04 1.71E+04
Tetrachloroethylene 127-18-4 Yes Yes Yes Yes 1.08E+01 CA 3.60E+02 2.52E+01
Tetrahydrofuran 109-99-9 Yes Yes Yes Yes 2.09E+03 NC 6.95E+04 1.10E+06
Toluene 108-88-3 Yes Yes Yes Yes 5.21E+03 NC 1.74E+05 3.16E+04
Trichloroethane, 1,1,1-71-55-6 Yes Yes Yes Yes 5.21E+03 NC 1.74E+05 1.13E+04
Trichloroethylene 79-01-6 Yes Yes Yes Yes 4.78E-01 CA 1.59E+01 1.87E+00
Trimethylbenzene, 1,2,4-95-63-6 Yes Yes Yes Yes 6.26E+01 NC 2.09E+03 4.75E+02
Output generated 24AUG2023:16:52:09
Resident Vapor Intrusion Screening Levels (VISL)3
Key: I = IRIS; P = PPRTV; O = OPP; A = ATSDR; C = Cal EPA; X = PPRTV Screening Level; H = HEAST; D = DWSHA; W = TEF applied; E = RPF applied;
U = user provided; G = see RSL User's Guide Section 5; CA = cancer; NC = noncancer.
Is Target
Groundwater
Concentration
< MCL?
(Cgw < MCL?)
Pure Phase
Vapor
Concentration
Cvp\
(15 ℃)\
(µg/m 3)
Maximum
Groundwater
Vapor
Concentration
Chc\
(µg/m 3)
Temperature
for Maximum
Groundwater
Vapor
Concentration
(℃)
Lower
Explosive
Limit
LEL
(%
by
volume)
LEL
Ref
IUR
(ug/m 3)-1
IUR
Ref
RfC
(mg/m 3)
RfC
Ref
Mutagenic
Indicator
Carcinogenic
VISL
TCR=1E-06
Cia,c
(µg/m 3)
Noncarcinogenic
VISL
THQ=1
Cia,nc
(µg/m 3)
7.23E+08 9.54E+08 15 2.50 CRC --No --
Yes (5)3.98E+08 2.62E+08 15 1.20 CRC 7.80E-06 I 3.00E-02 I No 3.60E-01 3.13E+01
Yes (80)4.41E+08 1.64E+08 15 -3.70E-05 C -No 7.59E-02 -
--1.47E+09 8.91E+08 15 1.30 CRC -7.00E-01 I No -7.30E+02
Yes (80)1.26E+09 7.95E+08 15 -2.30E-05 I 9.77E-02 A No 1.22E-01 1.02E+02
--1.21E+09 7.77E+08 15 5.40 CRC 1.60E-06 C -No 1.75E+00 -
No (70)1.04E+09 7.03E+08 15 3.00 CRC -4.00E-02 X No -4.17E+01
No (100)1.73E+09 1.17E+09 15 6.00 CRC -4.00E-02 X No -4.17E+01
1.47E+08 1.15E+08 15 3.30 CRC --No --
Yes (700)5.48E+07 3.12E+07 15 0.80 CRC 2.50E-06 C 1.00E+00 I No 1.12E+00 1.04E+03
--2.48E+08 1.71E+08 15 1.05 CRC -4.00E-01 P No -4.17E+02
--7.01E+08 4.61E+08 15 1.10 CRC -7.00E-01 I No -7.30E+02
--1.47E+08 1.80E+08 15 2.00 CRC -2.00E-01 P No -2.09E+02
--3.51E+08 3.29E+08 15 1.40 CRC -5.00E+00 I No -5.21E+03
No (5)1.99E+09 1.19E+09 15 13.00 CRC 1.00E-08 I 6.00E-01 I Mut 1.01E+02 6.26E+02
--1.97E+10 1.34E+09 15 2.00 CRC -3.00E+00 C No -3.13E+03
No (100)3.58E+07 1.89E+07 15 0.90 CRC -1.00E+00 I No -1.04E+03
No (5)1.65E+08 8.84E+07 15 -2.60E-07 I 4.00E-02 I No 1.08E+01 4.17E+01
--6.29E+08 1.90E+09 15 2.00 CRC -2.00E+00 I No -2.09E+03
No (1000)1.41E+08 8.67E+07 15 1.10 CRC -5.00E+00 I No -5.21E+03
No (200)8.90E+08 5.93E+08 15 8.00 CRC -5.00E+00 I No -5.21E+03
Yes (5)4.88E+08 3.28E+08 15 8.00 CRC 4.10E-06 I 2.00E-03 I Mut 4.78E-01 2.09E+00
--1.36E+07 7.51E+06 15 0.90 CRC -6.00E-02 I No -6.26E+01
Output generated 24AUG2023:16:52:09
Resident Vapor Intrusion Screening Levels (VISL)4
Key: I = IRIS; P = PPRTV; O = OPP; A = ATSDR; C = Cal EPA; X = PPRTV Screening Level; H = HEAST; D = DWSHA; W = TEF applied; E = RPF applied;
U = user provided; G = see RSL User's Guide Section 5; CA = cancer; NC = noncancer.
Chemical
CAS
Number
Does the
chemical
meet
the
definition
for
volatility?
(HLC>1E-5
or VP>1)
Does the
chemical
have
inhalation
toxicity
data?
(IUR
and/or
RfC)
Is Chemical
Sufficiently
Volatile and Toxic
to
Pose Inhalation
Risk
Via Vapor
Intrusion
from Soil
Source?
(Cvp > C i,a,Target?)
Is Chemical
Sufficiently
Volatile and Toxic
to
Pose Inhalation
Risk
Via Vapor
Intrusion from
Groundwater
Source?
(Chc > C i,a,Target?)
Target
Indoor Air
Concentration
(TCR=1E-06
or THQ=1)
MIN(Cia,c,Cia,nc )
(µg/m 3)
Toxicity
Basis
Target
Sub-Slab and
Near-source
Soil Gas
Concentration
(TCR=1E-06
or THQ=1)
Csg ,Target
(µg/m 3)
Target
Groundwater
Concentration
(TCR=1E-06
or THQ=1)
Cgw ,Target
(µg/L)
Xylene, m-108-38-3 Yes Yes Yes Yes 1.04E+02 NC 3.48E+03 6.24E+02
Xylene, o-95-47-6 Yes Yes Yes Yes 1.04E+02 NC 3.48E+03 8.73E+02
Output generated 24AUG2023:16:52:09
Resident Vapor Intrusion Screening Levels (VISL)5
Key: I = IRIS; P = PPRTV; O = OPP; A = ATSDR; C = Cal EPA; X = PPRTV Screening Level; H = HEAST; D = DWSHA; W = TEF applied; E = RPF applied;
U = user provided; G = see RSL User's Guide Section 5; CA = cancer; NC = noncancer.
Is Target
Groundwater
Concentration
< MCL?
(Cgw < MCL?)
Pure Phase
Vapor
Concentration
Cvp\
(15 ℃)\
(µg/m 3)
Maximum
Groundwater
Vapor
Concentration
Chc\
(µg/m 3)
Temperature
for Maximum
Groundwater
Vapor
Concentration
(℃)
Lower
Explosive
Limit
LEL
(%
by
volume)
LEL
Ref
IUR
(ug/m 3)-1
IUR
Ref
RfC
(mg/m 3)
RfC
Ref
Mutagenic
Indicator
Carcinogenic
VISL
TCR=1E-06
Cia,c
(µg/m 3)
Noncarcinogenic
VISL
THQ=1
Cia,nc
(µg/m 3)
--4.73E+07 2.69E+07 15 1.10 CRC -1.00E-01 G No -1.04E+02
--3.77E+07 2.13E+07 15 0.90 CRC -1.00E-01 G No -1.04E+02
Output generated 24AUG2023:16:52:09
Resident Vapor Intrusion Risk 6
Chemical
CAS
Number
Site
Sub-Slab and
Exterior Soil
Gas
Concentration
Csg \
(µg/m 3)
Site
Indoor Air
Concentration
Ci,a\
(µg/m 3)
VI
Carcinogenic
Risk
CDI
(µg/m 3)
VI
Carcinogenic
Risk
CR
Acetone 67-64-1 45.3 ---
Benzene 71-43-2 15.4 4.62E-01 1.65E-01 1.28E-06
Bromodichloromethane 75-27-4 9.72 2.92E-01 1.04E-01 3.84E-06
Carbon Disulfide 75-15-0 6.5 1.95E-01 6.95E-02 -
Chloroform 67-66-3 175 5.25E+00 1.87E+00 4.30E-05
Dichloroethane, 1,1-75-34-3 5.1 1.53E-01 5.45E-02 8.72E-08
Dichloroethylene, cis-1,2-156-59-2 92.2 2.77E+00 9.85E-01 -
Dichloroethylene, trans-1,2-156-60-5 160 4.80E+00 1.71E+00 -
Ethanol 64-17-5 46 ---
Ethylbenzene 100-41-4 8 2.40E-01 8.55E-02 2.14E-07
Heptane, N-142-82-5 4.35 1.31E-01 4.65E-02 -
Hexane, N-110-54-3 5.13 1.54E-01 5.48E-02 -
Isopropanol 67-63-0 21.9 6.57E-01 2.34E-01 -
Methyl Ethyl Ketone (2-Butanone)78-93-3 20 6.00E-01 2.14E-01 -
Methylene Chloride 75-09-2 7.23 2.17E-01 2.14E-01 2.14E-09
Propylene 115-07-1 4.7 1.41E-01 5.02E-02 -
Styrene 100-42-5 3.91 1.17E-01 4.18E-02 -
Tetrachloroethylene 127-18-4 7.42 2.23E-01 7.93E-02 2.06E-08
Tetrahydrofuran 109-99-9 5.96 1.79E-01 6.37E-02 -
Toluene 108-88-3 36.6 1.10E+00 3.91E-01 -
Trichloroethane, 1,1,1-71-55-6 800 2.40E+01 8.55E+00 -
Trichloroethylene 79-01-6 386 1.16E+01 5.90E+00 2.42E-05
Trimethylbenzene, 1,2,4-95-63-6 5.51 1.65E-01 5.89E-02 -
Xylene, m-108-38-3 31 9.30E-01 3.31E-01 -
Xylene, o-95-47-6 7 2.10E-01 7.48E-02 -
*Sum ---7.27E-05
Output generated 24AUG2023:16:52:09
Resident Vapor Intrusion Risk 7
VI
Hazard
CDI
(mg/m 3)
VI
Hazard
HQ
IUR
(ug/m 3)-1
IUR
Ref
Chronic
RfC
(mg/m 3)
RfC
Ref
Temperature
(℃)\
for
Groundwater
Vapor
Concentration Mutagen?
----15 No
4.43E-04 1.48E-02 7.80E-06 I 3.00E-02 IRIS 15 No
2.80E-04 -3.70E-05 C -15 No
1.87E-04 2.67E-04 -7.00E-01 IRIS 15 No
5.03E-03 5.16E-02 2.30E-05 I 9.77E-02 ATSDR 15 No
1.47E-04 -1.60E-06 C -15 No
2.65E-03 6.63E-02 -4.00E-02 SCREEN 15 No
4.60E-03 1.15E-01 -4.00E-02 SCREEN 15 No
----15 No
2.30E-04 2.30E-04 2.50E-06 C 1.00E+00 IRIS 15 No
1.25E-04 3.13E-04 -4.00E-01 PPRTV 15 No
1.48E-04 2.11E-04 -7.00E-01 IRIS 15 No
6.30E-04 3.15E-03 -2.00E-01 PPRTV 15 No
5.75E-04 1.15E-04 -5.00E+00 IRIS 15 No
2.08E-04 3.47E-04 1.00E-08 I 6.00E-01 IRIS 15 Mut
1.35E-04 4.51E-05 -3.00E+00 CALEPA 15 No
1.12E-04 1.12E-04 -1.00E+00 IRIS 15 No
2.13E-04 5.34E-03 2.60E-07 I 4.00E-02 IRIS 15 No
1.71E-04 8.57E-05 -2.00E+00 IRIS 15 No
1.05E-03 2.11E-04 -5.00E+00 IRIS 15 No
2.30E-02 4.60E-03 -5.00E+00 IRIS 15 No
1.11E-02 5.55E+00 4.10E-06 I 2.00E-03 IRIS 15 Mut
1.59E-04 2.64E-03 -6.00E-02 IRIS 15 No
8.92E-04 8.92E-03 -1.00E-01 SURROGATE 15 No
2.01E-04 2.01E-03 -1.00E-01 SURROGATE 15 No
-5.83E+00 ---
Output generated 24AUG2023:16:52:09
Chemical Properties 8
Chemical
CAS
Number
Does the
chemical
meet
the
definition
for
volatility?
(HLC>1E-5
or VP>1)
Does the
chemical
have
inhalation
toxicity
data?
(IUR
and/or
RfC)MW
MW
Ref
S
(mg/L)
S
Ref
MCL
(ug/L)
HLC
(atm-m 3/mole)
Henry's
Law
Constant
(unitless)
Henry's
Law
Constant
(15 ℃)
(unitless)
Henry's
Law
Constant
Used in
Calcs
(unitless)
Acetone 67-64-1 Yes No 58.08 PHYSPROP 1.00E+06 PHYSPROP -3.50E-05 1.43E-03 9.54E-04 9.54E-04
Benzene 71-43-2 Yes Yes 78.12 PHYSPROP 1.79E+03 PHYSPROP 5 5.55E-03 2.27E-01 1.46E-01 1.46E-01
Bromodichloromethane 75-27-4 Yes Yes 163.83 PHYSPROP 3.03E+03 PHYSPROP 80 2.12E-03 8.67E-02 5.41E-02 5.41E-02
Carbon Disulfide 75-15-0 Yes Yes 76.14 PHYSPROP 2.16E+03 PHYSPROP -1.44E-02 5.89E-01 4.13E-01 4.13E-01
Chloroform 67-66-3 Yes Yes 119.38 PHYSPROP 7.95E+03 PHYSPROP 80 3.67E-03 1.50E-01 1.00E-01 1.00E-01
Dichloroethane, 1,1-75-34-3 Yes Yes 98.96 PHYSPROP 5.04E+03 PHYSPROP -5.62E-03 2.30E-01 1.54E-01 1.54E-01
Dichloroethylene, cis-1,2-156-59-2 Yes Yes 96.94 PHYSPROP 6.41E+03 PHYSPROP 70 4.08E-03 1.67E-01 1.10E-01 1.10E-01
Dichloroethylene, trans-1,2-156-60-5 Yes Yes 96.94 PHYSPROP 4.52E+03 PHYSPROP 100 9.38E-03 3.83E-01 2.59E-01 2.59E-01
Ethanol 64-17-5 Yes No 46.07 PHYSPROP 1.00E+06 PHYSPROP -5.00E-06 2.04E-04 1.15E-04 1.15E-04
Ethylbenzene 100-41-4 Yes Yes 106.17 PHYSPROP 1.69E+02 PHYSPROP 700 7.88E-03 3.22E-01 1.84E-01 1.84E-01
Heptane, N-142-82-5 Yes Yes 100.21 PHYSPROP 3.40E+00 PHYSPROP -2.00E+00 8.18E+01 5.02E+01 5.02E+01
Hexane, N-110-54-3 Yes Yes 86.18 PHYSPROP 9.50E+00 PHYSPROP -1.80E+00 7.36E+01 4.86E+01 4.86E+01
Isopropanol 67-63-0 Yes Yes 60.10 PHYSPROP 1.00E+06 PHYSPROP -8.10E-06 3.31E-04 1.80E-04 1.80E-04
Methyl Ethyl Ketone (2-Butanone)78-93-3 Yes Yes 72.11 PHYSPROP 2.23E+05 PHYSPROP -5.69E-05 2.33E-03 1.47E-03 1.47E-03
Methylene Chloride 75-09-2 Yes Yes 84.93 PHYSPROP 1.30E+04 PHYSPROP 5 3.25E-03 1.33E-01 9.13E-02 9.13E-02
Propylene 115-07-1 Yes Yes 42.08 PHYSPROP 2.00E+02 PHYSPROP -1.96E-01 8.01E+00 6.72E+00 6.72E+00
Styrene 100-42-5 Yes Yes 104.15 PHYSPROP 3.10E+02 PHYSPROP 100 2.75E-03 1.12E-01 6.10E-02 6.10E-02
Tetrachloroethylene 127-18-4 Yes Yes 165.83 PHYSPROP 2.06E+02 PHYSPROP 5 1.77E-02 7.24E-01 4.29E-01 4.29E-01
Tetrahydrofuran 109-99-9 Yes Yes 72.11 PHYSPROP 1.00E+06 PHYSPROP -7.05E-05 2.88E-03 1.90E-03 1.90E-03
Toluene 108-88-3 Yes Yes 92.14 PHYSPROP 5.26E+02 PHYSPROP 1000 6.64E-03 2.71E-01 1.65E-01 1.65E-01
Trichloroethane, 1,1,1-71-55-6 Yes Yes 133.41 PHYSPROP 1.29E+03 PHYSPROP 200 1.72E-02 7.03E-01 4.60E-01 4.60E-01
Trichloroethylene 79-01-6 Yes Yes 131.39 PHYSPROP 1.28E+03 PHYSPROP 5 9.85E-03 4.03E-01 2.56E-01 2.56E-01
Trimethylbenzene, 1,2,4-95-63-6 Yes Yes 120.20 PHYSPROP 5.70E+01 PHYSPROP -6.16E-03 2.52E-01 1.32E-01 1.32E-01
Xylene, m-108-38-3 Yes Yes 106.17 PHYSPROP 1.61E+02 PHYSPROP -7.18E-03 2.94E-01 1.67E-01 1.67E-01
Xylene, o-95-47-6 Yes Yes 106.17 PHYSPROP 1.78E+02 PHYSPROP -5.18E-03 2.12E-01 1.19E-01 1.19E-01
Output generated 24AUG2023:16:52:09
Chemical Properties 9
H` and HLC
Ref
Enthalpy of
vaporization
@
groundwater
temperature
ΔHv,gw \
(cal/mol)
Enthalpy of
vaporization
at
the normal
boiling point
ΔHv,b\
(cal/mol)
ΔHv,b\
Ref
Normal
Boiling
Point
BP
(K)
BP
Ref
Exponent
for
ΔHv,gw
Vapor
Pressure
VP
(mm Hg)
VP
Ref
Vapor
Pressure
VP
(15 ℃)\
(mm Hg)
Critical
Temperature
TC\
(K)
TC\
Ref
Lower
Explosive
Limit
LEL
(%
by
volume)
LEL
Ref
PHYSPROP 7496.47 6955.07 CRC 329.15 PHYSPROP 0.36 2.32E+02 PHYSPROP 1.49E+02 5.08E+02 CRC 2.50 CRC
PHYSPROP 8070.48 7342.26 CRC 353.15 PHYSPROP 0.35 9.48E+01 PHYSPROP 5.91E+01 5.62E+02 CRC 1.20 CRC
PHYSPROP 8615.79 7800.00 Weast 363.15 PHYSPROP 0.34 5.00E+01 PHYSPROP 3.02E+01 5.86E+02 Weast -
PHYSPROP 6645.03 6391.01 CRC 319.15 PHYSPROP 0.31 3.59E+02 PHYSPROP 2.43E+02 5.52E+02 CRC 1.30 CRC
PHYSPROP 7503.46 6988.53 CRC 334.25 PHYSPROP 0.35 1.97E+02 PHYSPROP 1.27E+02 5.36E+02 CRC -
PHYSPROP 7393.98 6895.32 CRC 330.55 PHYSPROP 0.35 2.27E+02 PHYSPROP 1.47E+02 5.23E+02 CRC 5.40 CRC
PHYSPROP 7735.19 7217.97 CRC 333.25 PHYSPROP 0.34 2.00E+02 PHYSPROP 1.27E+02 5.36E+02 CRC 3.00 CRC
PHYSPROP 7301.56 6907.27 CRC 321.85 PHYSPROP 0.35 3.31E+02 EPI 2.16E+02 5.16E+02 CRC 6.00 CRC
PHYSPROP 10463.90 9216.06 CRC 351.35 PHYSPROP 0.39 5.93E+01 PHYSPROP 3.21E+01 5.15E+02 CRC 3.30 CRC
PHYSPROP 10097.43 8501.43 CRC 409.25 PHYSPROP 0.37 9.60E+00 PHYSPROP 5.31E+00 6.17E+02 CRC 0.80 CRC
EPI 8895.59 7593.21 CRC 371.65 PHYSPROP 0.39 4.60E+01 PHYSPROP 2.73E+01 5.40E+02 CRC 1.05 CRC
EPI 7677.04 6895.32 CRC 341.85 PHYSPROP 0.38 1.51E+02 PHYSPROP 9.65E+01 5.08E+02 CRC 1.10 CRC
PHYSPROP 11026.86 9524.38 CRC 355.45 PHYSPROP 0.40 4.54E+01 PHYSPROP 2.38E+01 5.08E+02 CRC 2.00 CRC
PHYSPROP 8359.04 7480.88 CRC 352.65 PHYSPROP 0.37 9.06E+01 PHYSPROP 5.55E+01 5.37E+02 CRC 1.40 CRC
PHYSPROP 6987.62 6706.50 CRC 313.15 PHYSPROP 0.34 4.35E+02 PHYSPROP 2.89E+02 5.08E+02 CRC 13.00 CRC
PHYSPROP 3589.64 4402.49 CRC 225.15 PHYSPROP 0.34 8.69E+03 PHYSPROP 7.04E+03 3.65E+02 CRC 2.00 CRC
PHYSPROP 11011.75 9249.52 CRC 418.15 PHYSPROP 0.37 6.40E+00 PHYSPROP 3.36E+00 6.35E+02 CRC 0.90 CRC
PHYSPROP 9505.75 8288.72 CRC 394.45 PHYSPROP 0.35 1.85E+01 PHYSPROP 1.06E+01 6.20E+02 YAWS -
PHYSPROP 7694.12 7124.76 CRC 338.15 PHYSPROP 0.35 1.62E+02 PHYSPROP 1.03E+02 5.40E+02 CRC 2.00 CRC
PHYSPROP 9099.00 7930.21 CRC 383.75 PHYSPROP 0.36 2.84E+01 PHYSPROP 1.67E+01 5.92E+02 CRC 1.10 CRC
PHYSPROP 7830.25 7136.71 CRC 347.15 PHYSPROP 0.36 1.24E+02 PHYSPROP 7.84E+01 5.45E+02 YAWS 8.00 CRC
PHYSPROP 8322.71 7504.78 CRC 360.35 PHYSPROP 0.35 6.90E+01 PHYSPROP 4.24E+01 5.71E+02 YAWS 8.00 CRC
PHYSPROP 11634.87 9368.80 TOXNET 442.45 PHYSPROP 0.39 2.10E+00 PHYSPROP 1.06E+00 6.49E+02 CRC 0.90 CRC
PHYSPROP 10197.84 8522.94 CRC 412.25 PHYSPROP 0.38 8.29E+00 PHYSPROP 4.56E+00 6.17E+02 CRC 1.10 CRC
PHYSPROP 10349.87 8661.57 CRC 417.65 PHYSPROP 0.37 6.61E+00 PHYSPROP 3.61E+00 6.30E+02 CRC 0.90 CRC
Output generated 24AUG2023:16:45:26
Commercial Air Inputs 1
Variable
Commercial
Air
Default
Value
Site-Specific
Value
AFgw (Attenuation Factor Groundwater) unitless 0.001 0.001
AFss (Attenuation Factor Sub-Slab) unitless 0.03 0.03
ATcom (averaging time - composite worker)365 365
EDcom (exposure duration - composite worker) yr 25 25
EFcom (exposure frequency - composite worker) day/yr 250 250
ETcom (exposure time - composite worker) hr 8 8
THQ (target hazard quotient) unitless 0.1 1
LT (lifetime) yr 70 70
TR (target risk) unitless 1.0E-06 1.0E-06
Output generated 24AUG2023:16:45:26
Commercial Vapor Intrusion Screening Levels (VISL)2
Key: I = IRIS; P = PPRTV; O = OPP; A = ATSDR; C = Cal EPA; X = PPRTV Screening Level; H = HEAST; D = DWSHA; W = TEF applied; E = RPF applied;
U = user provided; G = see RSL User's Guide Section 5; CA = cancer; NC = noncancer.
Chemical
CAS
Number
Does the
chemical
meet
the
definition
for
volatility?
(HLC>1E-5
or VP>1)
Does the
chemical
have
inhalation
toxicity
data?
(IUR
and/or
RfC)
Is Chemical
Sufficiently
Volatile and Toxic
to
Pose Inhalation
Risk
Via Vapor
Intrusion
from Soil
Source?
(Cvp > C i,a,Target?)
Is Chemical
Sufficiently
Volatile and Toxic
to
Pose Inhalation
Risk
Via Vapor
Intrusion from
Groundwater
Source?
(Chc > C i,a,Target?)
Target
Indoor Air
Concentration
(TCR=1E-06
or THQ=1)
MIN(Cia,c,Cia,nc )
(µg/m 3)
Toxicity
Basis
Target
Sub-Slab and
Near-source
Soil Gas
Concentration
(TCR=1E-06
or THQ=1)
Csg ,Target
(µg/m 3)
Target
Groundwater
Concentration
(TCR=1E-06
or THQ=1)
Cgw ,Target
(µg/L)
Acetone 67-64-1 Yes No No Inhal. Tox. Info No Inhal. Tox. Info ---
Benzene 71-43-2 Yes Yes Yes Yes 1.57E+00 CA 5.24E+01 1.07E+01
Bromodichloromethane 75-27-4 Yes Yes Yes Yes 3.31E-01 CA 1.10E+01 6.12E+00
Carbon Disulfide 75-15-0 Yes Yes Yes Yes 3.07E+03 NC 1.02E+05 7.43E+03
Chloroform 67-66-3 Yes Yes Yes Yes 5.33E-01 CA 1.78E+01 5.33E+00
Dichloroethane, 1,1-75-34-3 Yes Yes Yes Yes 7.67E+00 CA 2.56E+02 4.97E+01
Dichloroethylene, cis-1,2-156-59-2 Yes Yes Yes Yes 1.75E+02 NC 5.84E+03 1.60E+03
Dichloroethylene, trans-1,2-156-60-5 Yes Yes Yes Yes 1.75E+02 NC 5.84E+03 6.77E+02
Ethanol 64-17-5 Yes No No Inhal. Tox. Info No Inhal. Tox. Info ---
Ethylbenzene 100-41-4 Yes Yes Yes Yes 4.91E+00 CA 1.64E+02 2.66E+01
Heptane, N-142-82-5 Yes Yes Yes Yes 1.75E+03 NC 5.84E+04 3.49E+01
Hexane, N-110-54-3 Yes Yes Yes Yes 3.07E+03 NC 1.02E+05 6.31E+01
Isopropanol 67-63-0 Yes Yes Yes Yes 8.76E+02 NC 2.92E+04 4.88E+06
Methyl Ethyl Ketone (2-Butanone)78-93-3 Yes Yes Yes Yes 2.19E+04 NC 7.30E+05 1.48E+07
Methylene Chloride 75-09-2 Yes Yes Yes Yes 1.23E+03 CA 4.09E+04 1.34E+04
Propylene 115-07-1 Yes Yes Yes Yes 1.31E+04 NC 4.38E+05 1.96E+03
Styrene 100-42-5 Yes Yes Yes Yes 4.38E+03 NC 1.46E+05 7.18E+04
Tetrachloroethylene 127-18-4 Yes Yes Yes Yes 4.72E+01 CA 1.57E+03 1.10E+02
Tetrahydrofuran 109-99-9 Yes Yes Yes Yes 8.76E+03 NC 2.92E+05 4.61E+06
Toluene 108-88-3 Yes Yes Yes Yes 2.19E+04 NC 7.30E+05 1.33E+05
Trichloroethane, 1,1,1-71-55-6 Yes Yes Yes Yes 2.19E+04 NC 7.30E+05 4.76E+04
Trichloroethylene 79-01-6 Yes Yes Yes Yes 2.99E+00 CA 9.97E+01 1.17E+01
Trimethylbenzene, 1,2,4-95-63-6 Yes Yes Yes Yes 2.63E+02 NC 8.76E+03 1.99E+03
Output generated 24AUG2023:16:45:26
Commercial Vapor Intrusion Screening Levels (VISL)3
Key: I = IRIS; P = PPRTV; O = OPP; A = ATSDR; C = Cal EPA; X = PPRTV Screening Level; H = HEAST; D = DWSHA; W = TEF applied; E = RPF applied;
U = user provided; G = see RSL User's Guide Section 5; CA = cancer; NC = noncancer.
Is Target
Groundwater
Concentration
< MCL?
(Cgw < MCL?)
Pure Phase
Vapor
Concentration
Cvp\
(15 ℃)\
(µg/m 3)
Maximum
Groundwater
Vapor
Concentration
Chc\
(µg/m 3)
Temperature
for Maximum
Groundwater
Vapor
Concentration
(℃)
Lower
Explosive
Limit
LEL
(%
by
volume)
LEL
Ref
IUR
(ug/m 3)-1
IUR
Ref
RfC
(mg/m 3)
RfC
Ref
Mutagenic
Indicator
Carcinogenic
VISL
TCR=1E-06
Cia,c
(µg/m 3)
Noncarcinogenic
VISL
THQ=1
Cia,nc
(µg/m 3)
7.23E+08 9.54E+08 15 2.50 CRC --No --
No (5)3.98E+08 2.62E+08 15 1.20 CRC 7.80E-06 I 3.00E-02 I No 1.57E+00 1.31E+02
Yes (80)4.41E+08 1.64E+08 15 -3.70E-05 C -No 3.31E-01 -
--1.47E+09 8.91E+08 15 1.30 CRC -7.00E-01 I No -3.07E+03
Yes (80)1.26E+09 7.95E+08 15 -2.30E-05 I 9.77E-02 A No 5.33E-01 4.28E+02
--1.21E+09 7.77E+08 15 5.40 CRC 1.60E-06 C -No 7.67E+00 -
No (70)1.04E+09 7.03E+08 15 3.00 CRC -4.00E-02 X No -1.75E+02
No (100)1.73E+09 1.17E+09 15 6.00 CRC -4.00E-02 X No -1.75E+02
1.47E+08 1.15E+08 15 3.30 CRC --No --
Yes (700)5.48E+07 3.12E+07 15 0.80 CRC 2.50E-06 C 1.00E+00 I No 4.91E+00 4.38E+03
--2.48E+08 1.71E+08 15 1.05 CRC -4.00E-01 P No -1.75E+03
--7.01E+08 4.61E+08 15 1.10 CRC -7.00E-01 I No -3.07E+03
--1.47E+08 1.80E+08 15 2.00 CRC -2.00E-01 P No -8.76E+02
--3.51E+08 3.29E+08 15 1.40 CRC -5.00E+00 I No -2.19E+04
No (5)1.99E+09 1.19E+09 15 13.00 CRC 1.00E-08 I 6.00E-01 I Mut 1.23E+03 2.63E+03
--1.97E+10 1.34E+09 15 2.00 CRC -3.00E+00 C No -1.31E+04
No (100)3.58E+07 1.89E+07 15 0.90 CRC -1.00E+00 I No -4.38E+03
No (5)1.65E+08 8.84E+07 15 -2.60E-07 I 4.00E-02 I No 4.72E+01 1.75E+02
--6.29E+08 1.90E+09 15 2.00 CRC -2.00E+00 I No -8.76E+03
No (1000)1.41E+08 8.67E+07 15 1.10 CRC -5.00E+00 I No -2.19E+04
No (200)8.90E+08 5.93E+08 15 8.00 CRC -5.00E+00 I No -2.19E+04
No (5)4.88E+08 3.28E+08 15 8.00 CRC 4.10E-06 I 2.00E-03 I Mut 2.99E+00 8.76E+00
--1.36E+07 7.51E+06 15 0.90 CRC -6.00E-02 I No -2.63E+02
Output generated 24AUG2023:16:45:26
Commercial Vapor Intrusion Screening Levels (VISL)4
Key: I = IRIS; P = PPRTV; O = OPP; A = ATSDR; C = Cal EPA; X = PPRTV Screening Level; H = HEAST; D = DWSHA; W = TEF applied; E = RPF applied;
U = user provided; G = see RSL User's Guide Section 5; CA = cancer; NC = noncancer.
Chemical
CAS
Number
Does the
chemical
meet
the
definition
for
volatility?
(HLC>1E-5
or VP>1)
Does the
chemical
have
inhalation
toxicity
data?
(IUR
and/or
RfC)
Is Chemical
Sufficiently
Volatile and Toxic
to
Pose Inhalation
Risk
Via Vapor
Intrusion
from Soil
Source?
(Cvp > C i,a,Target?)
Is Chemical
Sufficiently
Volatile and Toxic
to
Pose Inhalation
Risk
Via Vapor
Intrusion from
Groundwater
Source?
(Chc > C i,a,Target?)
Target
Indoor Air
Concentration
(TCR=1E-06
or THQ=1)
MIN(Cia,c,Cia,nc )
(µg/m 3)
Toxicity
Basis
Target
Sub-Slab and
Near-source
Soil Gas
Concentration
(TCR=1E-06
or THQ=1)
Csg ,Target
(µg/m 3)
Target
Groundwater
Concentration
(TCR=1E-06
or THQ=1)
Cgw ,Target
(µg/L)
Xylene, m-108-38-3 Yes Yes Yes Yes 4.38E+02 NC 1.46E+04 2.62E+03
Xylene, o-95-47-6 Yes Yes Yes Yes 4.38E+02 NC 1.46E+04 3.67E+03
Output generated 24AUG2023:16:45:26
Commercial Vapor Intrusion Screening Levels (VISL)5
Key: I = IRIS; P = PPRTV; O = OPP; A = ATSDR; C = Cal EPA; X = PPRTV Screening Level; H = HEAST; D = DWSHA; W = TEF applied; E = RPF applied;
U = user provided; G = see RSL User's Guide Section 5; CA = cancer; NC = noncancer.
Is Target
Groundwater
Concentration
< MCL?
(Cgw < MCL?)
Pure Phase
Vapor
Concentration
Cvp\
(15 ℃)\
(µg/m 3)
Maximum
Groundwater
Vapor
Concentration
Chc\
(µg/m 3)
Temperature
for Maximum
Groundwater
Vapor
Concentration
(℃)
Lower
Explosive
Limit
LEL
(%
by
volume)
LEL
Ref
IUR
(ug/m 3)-1
IUR
Ref
RfC
(mg/m 3)
RfC
Ref
Mutagenic
Indicator
Carcinogenic
VISL
TCR=1E-06
Cia,c
(µg/m 3)
Noncarcinogenic
VISL
THQ=1
Cia,nc
(µg/m 3)
--4.73E+07 2.69E+07 15 1.10 CRC -1.00E-01 G No -4.38E+02
--3.77E+07 2.13E+07 15 0.90 CRC -1.00E-01 G No -4.38E+02
Output generated 24AUG2023:16:45:26
Commercial Vapor Intrusion Risk 6
Chemical
CAS
Number
Site
Sub-Slab and
Exterior Soil
Gas
Concentration
Csg \
(µg/m 3)
Site
Indoor Air
Concentration
Ci,a\
(µg/m 3)
VI
Carcinogenic
Risk
CDI
(µg/m 3)
VI
Carcinogenic
Risk
CR
Acetone 67-64-1 45.3 ---
Benzene 71-43-2 15.4 4.62E-01 3.77E-02 2.94E-07
Bromodichloromethane 75-27-4 9.72 2.92E-01 2.38E-02 8.80E-07
Carbon Disulfide 75-15-0 6.5 1.95E-01 1.59E-02 -
Chloroform 67-66-3 178 5.34E+00 4.35E-01 1.00E-05
Dichloroethane, 1,1-75-34-3 5.1 1.53E-01 1.25E-02 2.00E-08
Dichloroethylene, cis-1,2-156-59-2 92.2 2.77E+00 2.26E-01 -
Dichloroethylene, trans-1,2-156-60-5 160 4.80E+00 3.91E-01 -
Ethanol 64-17-5 46 ---
Ethylbenzene 100-41-4 8 2.40E-01 1.96E-02 4.89E-08
Heptane, N-142-82-5 4.35 1.31E-01 1.06E-02 -
Hexane, N-110-54-3 5.13 1.54E-01 1.25E-02 -
Isopropanol 67-63-0 21.9 6.57E-01 5.36E-02 -
Methyl Ethyl Ketone (2-Butanone)78-93-3 20 6.00E-01 4.89E-02 -
Methylene Chloride 75-09-2 7.23 2.17E-01 1.77E-02 1.77E-10
Propylene 115-07-1 21.9 6.57E-01 5.36E-02 -
Styrene 100-42-5 3.91 1.17E-01 9.56E-03 -
Tetrachloroethylene 127-18-4 7.42 2.23E-01 1.82E-02 4.72E-09
Tetrahydrofuran 109-99-9 5.96 1.79E-01 1.46E-02 -
Toluene 108-88-3 36.6 1.10E+00 8.95E-02 -
Trichloroethane, 1,1,1-71-55-6 800 2.40E+01 1.96E+00 -
Trichloroethylene 79-01-6 386 1.16E+01 9.44E-01 3.87E-06
Trimethylbenzene, 1,2,4-95-63-6 5.51 1.65E-01 1.35E-02 -
Xylene, m-108-38-3 31 9.30E-01 7.58E-02 -
Xylene, o-95-47-6 7 2.10E-01 1.71E-02 -
*Sum ---1.51E-05
Output generated 24AUG2023:16:45:26
Commercial Vapor Intrusion Risk 7
VI
Hazard
CDI
(mg/m 3)
VI
Hazard
HQ
IUR
(ug/m 3)-1
IUR
Ref
Chronic
RfC
(mg/m 3)
RfC
Ref
Temperature
(℃)\
for
Groundwater
Vapor
Concentration Mutagen?
----15 No
1.05E-04 3.52E-03 7.80E-06 I 3.00E-02 IRIS 15 No
6.66E-05 -3.70E-05 C -15 No
4.45E-05 6.36E-05 -7.00E-01 IRIS 15 No
1.22E-03 1.25E-02 2.30E-05 I 9.77E-02 ATSDR 15 No
3.49E-05 -1.60E-06 C -15 No
6.32E-04 1.58E-02 -4.00E-02 SCREEN 15 No
1.10E-03 2.74E-02 -4.00E-02 SCREEN 15 No
----15 No
5.48E-05 5.48E-05 2.50E-06 C 1.00E+00 IRIS 15 No
2.98E-05 7.45E-05 -4.00E-01 PPRTV 15 No
3.51E-05 5.02E-05 -7.00E-01 IRIS 15 No
1.50E-04 7.50E-04 -2.00E-01 PPRTV 15 No
1.37E-04 2.74E-05 -5.00E+00 IRIS 15 No
4.95E-05 8.25E-05 1.00E-08 I 6.00E-01 IRIS 15 Mut
1.50E-04 5.00E-05 -3.00E+00 CALEPA 15 No
2.68E-05 2.68E-05 -1.00E+00 IRIS 15 No
5.08E-05 1.27E-03 2.60E-07 I 4.00E-02 IRIS 15 No
4.08E-05 2.04E-05 -2.00E+00 IRIS 15 No
2.51E-04 5.01E-05 -5.00E+00 IRIS 15 No
5.48E-03 1.10E-03 -5.00E+00 IRIS 15 No
2.64E-03 1.32E+00 4.10E-06 I 2.00E-03 IRIS 15 Mut
3.77E-05 6.29E-04 -6.00E-02 IRIS 15 No
2.12E-04 2.12E-03 -1.00E-01 SURROGATE 15 No
4.79E-05 4.79E-04 -1.00E-01 SURROGATE 15 No
-1.39E+00 ---
Output generated 24AUG2023:16:45:26
Chemical Properties 8
Chemical
CAS
Number
Does the
chemical
meet
the
definition
for
volatility?
(HLC>1E-5
or VP>1)
Does the
chemical
have
inhalation
toxicity
data?
(IUR
and/or
RfC)MW
MW
Ref
S
(mg/L)
S
Ref
MCL
(ug/L)
HLC
(atm-m 3/mole)
Henry's
Law
Constant
(unitless)
Henry's
Law
Constant
(15 ℃)
(unitless)
Henry's
Law
Constant
Used in
Calcs
(unitless)
Acetone 67-64-1 Yes No 58.08 PHYSPROP 1.00E+06 PHYSPROP -3.50E-05 1.43E-03 9.54E-04 9.54E-04
Benzene 71-43-2 Yes Yes 78.12 PHYSPROP 1.79E+03 PHYSPROP 5 5.55E-03 2.27E-01 1.46E-01 1.46E-01
Bromodichloromethane 75-27-4 Yes Yes 163.83 PHYSPROP 3.03E+03 PHYSPROP 80 2.12E-03 8.67E-02 5.41E-02 5.41E-02
Carbon Disulfide 75-15-0 Yes Yes 76.14 PHYSPROP 2.16E+03 PHYSPROP -1.44E-02 5.89E-01 4.13E-01 4.13E-01
Chloroform 67-66-3 Yes Yes 119.38 PHYSPROP 7.95E+03 PHYSPROP 80 3.67E-03 1.50E-01 1.00E-01 1.00E-01
Dichloroethane, 1,1-75-34-3 Yes Yes 98.96 PHYSPROP 5.04E+03 PHYSPROP -5.62E-03 2.30E-01 1.54E-01 1.54E-01
Dichloroethylene, cis-1,2-156-59-2 Yes Yes 96.94 PHYSPROP 6.41E+03 PHYSPROP 70 4.08E-03 1.67E-01 1.10E-01 1.10E-01
Dichloroethylene, trans-1,2-156-60-5 Yes Yes 96.94 PHYSPROP 4.52E+03 PHYSPROP 100 9.38E-03 3.83E-01 2.59E-01 2.59E-01
Ethanol 64-17-5 Yes No 46.07 PHYSPROP 1.00E+06 PHYSPROP -5.00E-06 2.04E-04 1.15E-04 1.15E-04
Ethylbenzene 100-41-4 Yes Yes 106.17 PHYSPROP 1.69E+02 PHYSPROP 700 7.88E-03 3.22E-01 1.84E-01 1.84E-01
Heptane, N-142-82-5 Yes Yes 100.21 PHYSPROP 3.40E+00 PHYSPROP -2.00E+00 8.18E+01 5.02E+01 5.02E+01
Hexane, N-110-54-3 Yes Yes 86.18 PHYSPROP 9.50E+00 PHYSPROP -1.80E+00 7.36E+01 4.86E+01 4.86E+01
Isopropanol 67-63-0 Yes Yes 60.10 PHYSPROP 1.00E+06 PHYSPROP -8.10E-06 3.31E-04 1.80E-04 1.80E-04
Methyl Ethyl Ketone (2-Butanone)78-93-3 Yes Yes 72.11 PHYSPROP 2.23E+05 PHYSPROP -5.69E-05 2.33E-03 1.47E-03 1.47E-03
Methylene Chloride 75-09-2 Yes Yes 84.93 PHYSPROP 1.30E+04 PHYSPROP 5 3.25E-03 1.33E-01 9.13E-02 9.13E-02
Propylene 115-07-1 Yes Yes 42.08 PHYSPROP 2.00E+02 PHYSPROP -1.96E-01 8.01E+00 6.72E+00 6.72E+00
Styrene 100-42-5 Yes Yes 104.15 PHYSPROP 3.10E+02 PHYSPROP 100 2.75E-03 1.12E-01 6.10E-02 6.10E-02
Tetrachloroethylene 127-18-4 Yes Yes 165.83 PHYSPROP 2.06E+02 PHYSPROP 5 1.77E-02 7.24E-01 4.29E-01 4.29E-01
Tetrahydrofuran 109-99-9 Yes Yes 72.11 PHYSPROP 1.00E+06 PHYSPROP -7.05E-05 2.88E-03 1.90E-03 1.90E-03
Toluene 108-88-3 Yes Yes 92.14 PHYSPROP 5.26E+02 PHYSPROP 1000 6.64E-03 2.71E-01 1.65E-01 1.65E-01
Trichloroethane, 1,1,1-71-55-6 Yes Yes 133.41 PHYSPROP 1.29E+03 PHYSPROP 200 1.72E-02 7.03E-01 4.60E-01 4.60E-01
Trichloroethylene 79-01-6 Yes Yes 131.39 PHYSPROP 1.28E+03 PHYSPROP 5 9.85E-03 4.03E-01 2.56E-01 2.56E-01
Trimethylbenzene, 1,2,4-95-63-6 Yes Yes 120.20 PHYSPROP 5.70E+01 PHYSPROP -6.16E-03 2.52E-01 1.32E-01 1.32E-01
Xylene, m-108-38-3 Yes Yes 106.17 PHYSPROP 1.61E+02 PHYSPROP -7.18E-03 2.94E-01 1.67E-01 1.67E-01
Xylene, o-95-47-6 Yes Yes 106.17 PHYSPROP 1.78E+02 PHYSPROP -5.18E-03 2.12E-01 1.19E-01 1.19E-01
Output generated 24AUG2023:16:45:26
Chemical Properties 9
H` and HLC
Ref
Enthalpy of
vaporization
@
groundwater
temperature
ΔHv,gw \
(cal/mol)
Enthalpy of
vaporization
at
the normal
boiling point
ΔHv,b\
(cal/mol)
ΔHv,b\
Ref
Normal
Boiling
Point
BP
(K)
BP
Ref
Exponent
for
ΔHv,gw
Vapor
Pressure
VP
(mm Hg)
VP
Ref
Vapor
Pressure
VP
(15 ℃)\
(mm Hg)
Critical
Temperature
TC\
(K)
TC\
Ref
Lower
Explosive
Limit
LEL
(%
by
volume)
LEL
Ref
PHYSPROP 7496.47 6955.07 CRC 329.15 PHYSPROP 0.36 2.32E+02 PHYSPROP 1.49E+02 5.08E+02 CRC 2.50 CRC
PHYSPROP 8070.48 7342.26 CRC 353.15 PHYSPROP 0.35 9.48E+01 PHYSPROP 5.91E+01 5.62E+02 CRC 1.20 CRC
PHYSPROP 8615.79 7800.00 Weast 363.15 PHYSPROP 0.34 5.00E+01 PHYSPROP 3.02E+01 5.86E+02 Weast -
PHYSPROP 6645.03 6391.01 CRC 319.15 PHYSPROP 0.31 3.59E+02 PHYSPROP 2.43E+02 5.52E+02 CRC 1.30 CRC
PHYSPROP 7503.46 6988.53 CRC 334.25 PHYSPROP 0.35 1.97E+02 PHYSPROP 1.27E+02 5.36E+02 CRC -
PHYSPROP 7393.98 6895.32 CRC 330.55 PHYSPROP 0.35 2.27E+02 PHYSPROP 1.47E+02 5.23E+02 CRC 5.40 CRC
PHYSPROP 7735.19 7217.97 CRC 333.25 PHYSPROP 0.34 2.00E+02 PHYSPROP 1.27E+02 5.36E+02 CRC 3.00 CRC
PHYSPROP 7301.56 6907.27 CRC 321.85 PHYSPROP 0.35 3.31E+02 EPI 2.16E+02 5.16E+02 CRC 6.00 CRC
PHYSPROP 10463.90 9216.06 CRC 351.35 PHYSPROP 0.39 5.93E+01 PHYSPROP 3.21E+01 5.15E+02 CRC 3.30 CRC
PHYSPROP 10097.43 8501.43 CRC 409.25 PHYSPROP 0.37 9.60E+00 PHYSPROP 5.31E+00 6.17E+02 CRC 0.80 CRC
EPI 8895.59 7593.21 CRC 371.65 PHYSPROP 0.39 4.60E+01 PHYSPROP 2.73E+01 5.40E+02 CRC 1.05 CRC
EPI 7677.04 6895.32 CRC 341.85 PHYSPROP 0.38 1.51E+02 PHYSPROP 9.65E+01 5.08E+02 CRC 1.10 CRC
PHYSPROP 11026.86 9524.38 CRC 355.45 PHYSPROP 0.40 4.54E+01 PHYSPROP 2.38E+01 5.08E+02 CRC 2.00 CRC
PHYSPROP 8359.04 7480.88 CRC 352.65 PHYSPROP 0.37 9.06E+01 PHYSPROP 5.55E+01 5.37E+02 CRC 1.40 CRC
PHYSPROP 6987.62 6706.50 CRC 313.15 PHYSPROP 0.34 4.35E+02 PHYSPROP 2.89E+02 5.08E+02 CRC 13.00 CRC
PHYSPROP 3589.64 4402.49 CRC 225.15 PHYSPROP 0.34 8.69E+03 PHYSPROP 7.04E+03 3.65E+02 CRC 2.00 CRC
PHYSPROP 11011.75 9249.52 CRC 418.15 PHYSPROP 0.37 6.40E+00 PHYSPROP 3.36E+00 6.35E+02 CRC 0.90 CRC
PHYSPROP 9505.75 8288.72 CRC 394.45 PHYSPROP 0.35 1.85E+01 PHYSPROP 1.06E+01 6.20E+02 YAWS -
PHYSPROP 7694.12 7124.76 CRC 338.15 PHYSPROP 0.35 1.62E+02 PHYSPROP 1.03E+02 5.40E+02 CRC 2.00 CRC
PHYSPROP 9099.00 7930.21 CRC 383.75 PHYSPROP 0.36 2.84E+01 PHYSPROP 1.67E+01 5.92E+02 CRC 1.10 CRC
PHYSPROP 7830.25 7136.71 CRC 347.15 PHYSPROP 0.36 1.24E+02 PHYSPROP 7.84E+01 5.45E+02 YAWS 8.00 CRC
PHYSPROP 8322.71 7504.78 CRC 360.35 PHYSPROP 0.35 6.90E+01 PHYSPROP 4.24E+01 5.71E+02 YAWS 8.00 CRC
PHYSPROP 11634.87 9368.80 TOXNET 442.45 PHYSPROP 0.39 2.10E+00 PHYSPROP 1.06E+00 6.49E+02 CRC 0.90 CRC
PHYSPROP 10197.84 8522.94 CRC 412.25 PHYSPROP 0.38 8.29E+00 PHYSPROP 4.56E+00 6.17E+02 CRC 1.10 CRC
PHYSPROP 10349.87 8661.57 CRC 417.65 PHYSPROP 0.37 6.61E+00 PHYSPROP 3.61E+00 6.30E+02 CRC 0.90 CRC
VERSION:
Construction Worker Quantitative Risk Assessment Report
VURAM
All Report Pages are Required for Risk Assessment Submission
Virginia Department of Environmental Quality
Site Name:Woodbine
Program:RCRA Corrective Action
F
By submitting this report to the Virginia DEQ, the user confirms that VURAM's default
exposure parameters have not been altered, unless a complete unaltered VURAM analysis is
provided and all modifications are detailed explicitly in an accompanying narrative or
documentation that shows DEQ's prior concurrence with specific changes.
Virginia Unified Risk Assessment Model
Chemical Specific Notes displayed as applicable
3.2.2
Tuesday, August 29, 2023 Page 1 of 14
RCRA Corrective Action
1.00E-06 1.00E-041
Risk Based Performance Criteria
Default Risk Individual Chemical Default Cumulative Risk-All ChemicalsDefault Hazard Index
WoodbineSite Name:
Program:
Construction
Air
µg/m3
0.00%0.00%
Concentration :4.53E+01
Mutagen:
RfDo:
RfCi:3.09E+01
SFO:
IUR:
Ingestion:
Dermal:
Inhalation:1.85E-06
Ingestion:
Dermal:
Inhalation:
Non-Cancer Adult Cancer
Total:0.00E+00Total:1.85E-06
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Acetone
CAS:67-64-1
VOC:Y
µg/m3
0.14%2.35%
Concentration :1.54E+01
Mutagen:
RfDo:
RfCi:8.00E-02
SFO:
IUR:7.80E-06
Ingestion:
Dermal:
Inhalation:2.05E-04
Ingestion:
Dermal:
Inhalation:1.76E-09
Non-Cancer Adult Cancer
Total:1.76E-09Total:2.05E-04
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Benzene
CAS:71-43-2
VOC:Y
µg/m3
0.22%4.43%
Concentration :9.72E+00
Mutagen:
RfDo:
RfCi:2.00E-02
SFO:
IUR:3.70E-05
Ingestion:
Dermal:
Inhalation:3.26E-04
Ingestion:
Dermal:
Inhalation:3.30E-09
Non-Cancer Adult Cancer
Total:3.30E-09Total:3.26E-04
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Bromodichloromethane
CAS:75-27-4
VOC:Y
Tuesday, August 29, 2023 Page 2 of 14
RCRA Corrective Action
1.00E-06 1.00E-041
Risk Based Performance Criteria
Default Risk Individual Chemical Default Cumulative Risk-All ChemicalsDefault Hazard Index
WoodbineSite Name:
Program:
Construction
Air
µg/m3
0.01%0.00%
Concentration :6.50E+00
Mutagen:
RfDo:
RfCi:7.00E-01
SFO:
IUR:
Ingestion:
Dermal:
Inhalation:1.18E-05
Ingestion:
Dermal:
Inhalation:
Non-Cancer Adult Cancer
Total:0.00E+00Total:1.18E-05
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Carbon Disulfide
CAS:75-15-0
VOC:Y
µg/m3
0.45%68.95%
Concentration :1.78E+02
Mutagen:
RfDo:
RfCi:2.44E-01
SFO:
IUR:2.30E-05
Ingestion:
Dermal:
Inhalation:6.69E-04
Ingestion:
Dermal:
Inhalation:5.14E-08
Non-Cancer Adult Cancer
Total:5.14E-08Total:6.69E-04
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Chloroform
CAS:67-66-3
VOC:Y
µg/m3
0.00%0.15%
Concentration :5.10E+00
Mutagen:
RfDo:
RfCi:
SFO:
IUR:1.60E-06
Ingestion:
Dermal:
Inhalation:
Ingestion:
Dermal:
Inhalation:1.11E-10
Non-Cancer Adult Cancer
Total:1.11E-10Total:0.00E+00
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Dichloroethane, 1,1-
CAS:75-34-3
VOC:Y
Tuesday, August 29, 2023 Page 3 of 14
RCRA Corrective Action
1.00E-06 1.00E-041
Risk Based Performance Criteria
Default Risk Individual Chemical Default Cumulative Risk-All ChemicalsDefault Hazard Index
WoodbineSite Name:
Program:
Construction
Air
µg/m3
0.16%0.00%
Concentration :9.22E+01
Mutagen:
RfDo:
RfCi:4.00E-01
SFO:
IUR:
Ingestion:
Dermal:
Inhalation:2.43E-04
Ingestion:
Dermal:
Inhalation:
Non-Cancer Adult Cancer
Total:0.00E+00Total:2.43E-04
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Dichloroethylene, cis-1,2-
CAS:156-59-2
VOC:Y
µg/m3
0.14%0.00%
Concentration :1.60E+02
Mutagen:
RfDo:
RfCi:7.93E-01
SFO:
IUR:
Ingestion:
Dermal:
Inhalation:2.11E-04
Ingestion:
Dermal:
Inhalation:
Non-Cancer Adult Cancer
Total:0.00E+00Total:2.11E-04
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Dichloroethylene, trans-1,2-
CAS:156-60-5
VOC:Y
µg/m3
0.00%0.30%
Concentration :8.00E+00
Mutagen:
RfDo:
RfCi:9.00E+00
SFO:
IUR:2.50E-06
Ingestion:
Dermal:
Inhalation:7.25E-07
Ingestion:
Dermal:
Inhalation:2.24E-10
Non-Cancer Adult Cancer
Total:2.24E-10Total:7.25E-07
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Ethylbenzene
CAS:100-41-4
VOC:Y
Tuesday, August 29, 2023 Page 4 of 14
RCRA Corrective Action
1.00E-06 1.00E-041
Risk Based Performance Criteria
Default Risk Individual Chemical Default Cumulative Risk-All ChemicalsDefault Hazard Index
WoodbineSite Name:
Program:
Construction
Air
µg/m3
0.00%0.00%
Concentration :4.35E+00
Mutagen:
RfDo:
RfCi:4.00E+00
SFO:
IUR:
Ingestion:
Dermal:
Inhalation:8.42E-07
Ingestion:
Dermal:
Inhalation:
Non-Cancer Adult Cancer
Total:0.00E+00Total:8.42E-07
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Heptane, N-
CAS:142-82-5
VOC:Y
µg/m3
0.00%0.00%
Concentration :5.13E+00
Mutagen:
RfDo:
RfCi:2.00E+00
SFO:
IUR:
Ingestion:
Dermal:
Inhalation:2.24E-06
Ingestion:
Dermal:
Inhalation:
Non-Cancer Adult Cancer
Total:0.00E+00Total:2.24E-06
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Hexane, N-
CAS:110-54-3
VOC:Y
µg/m3
0.00%0.00%
Concentration :2.19E+01
Mutagen:
RfDo:
RfCi:7.00E+00
SFO:
IUR:
Ingestion:
Dermal:
Inhalation:3.85E-06
Ingestion:
Dermal:
Inhalation:
Non-Cancer Adult Cancer
Total:0.00E+00Total:3.85E-06
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Isopropanol
CAS:67-63-0
VOC:Y
Tuesday, August 29, 2023 Page 5 of 14
RCRA Corrective Action
1.00E-06 1.00E-041
Risk Based Performance Criteria
Default Risk Individual Chemical Default Cumulative Risk-All ChemicalsDefault Hazard Index
WoodbineSite Name:
Program:
Construction
Air
µg/m3
0.01%0.00%
Concentration :2.00E+01
Mutagen:
RfDo:
RfCi:1.00E+00
SFO:
IUR:
Ingestion:
Dermal:
Inhalation:2.18E-05
Ingestion:
Dermal:
Inhalation:
Non-Cancer Adult Cancer
Total:0.00E+00Total:2.18E-05
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Methyl Ethyl Ketone (2-Butanone)
CAS:78-93-3
VOC:Y
µg/m3
0.01%0.00%
Concentration :7.23E+00
Mutagen:Y
RfDo:
RfCi:1.04E+00
SFO:
IUR:1.00E-08
Ingestion:
Dermal:
Inhalation:8.26E-06
Ingestion:
Dermal:
Inhalation:1.18E-12
Non-Cancer Adult Cancer
Total:1.18E-12Total:8.26E-06
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Methylene Chloride
CAS:75-09-2
VOC:Y
µg/m3
0.00%0.00%
Concentration :4.70E+00
Mutagen:
RfDo:
RfCi:3.00E+00
SFO:
IUR:
Ingestion:
Dermal:
Inhalation:2.05E-06
Ingestion:
Dermal:
Inhalation:
Non-Cancer Adult Cancer
Total:0.00E+00Total:2.05E-06
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Propylene
CAS:115-07-1
VOC:Y
Tuesday, August 29, 2023 Page 6 of 14
RCRA Corrective Action
1.00E-06 1.00E-041
Risk Based Performance Criteria
Default Risk Individual Chemical Default Cumulative Risk-All ChemicalsDefault Hazard Index
WoodbineSite Name:
Program:
Construction
Air
µg/m3
0.00%0.00%
Concentration :3.91E+00
Mutagen:
RfDo:
RfCi:3.00E+00
SFO:
IUR:
Ingestion:
Dermal:
Inhalation:1.10E-06
Ingestion:
Dermal:
Inhalation:
Non-Cancer Adult Cancer
Total:0.00E+00Total:1.10E-06
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Styrene
CAS:100-42-5
VOC:Y
µg/m3
0.07%0.02%
Concentration :7.42E+00
Mutagen:
RfDo:
RfCi:4.07E-02
SFO:
IUR:2.60E-07
Ingestion:
Dermal:
Inhalation:1.10E-04
Ingestion:
Dermal:
Inhalation:1.59E-11
Non-Cancer Adult Cancer
Total:1.59E-11Total:1.10E-04
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Tetrachloroethylene
CAS:127-18-4
VOC:Y
µg/m3
0.00%0.00%
Concentration :5.96E+00
Mutagen:
RfDo:
RfCi:2.00E+00
SFO:
IUR:
Ingestion:
Dermal:
Inhalation:3.53E-06
Ingestion:
Dermal:
Inhalation:
Non-Cancer Adult Cancer
Total:0.00E+00Total:3.53E-06
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Tetrahydrofuran
CAS:109-99-9
VOC:Y
Tuesday, August 29, 2023 Page 7 of 14
RCRA Corrective Action
1.00E-06 1.00E-041
Risk Based Performance Criteria
Default Risk Individual Chemical Default Cumulative Risk-All ChemicalsDefault Hazard Index
WoodbineSite Name:
Program:
Construction
Air
µg/m3
0.00%0.00%
Concentration :3.66E+01
Mutagen:
RfDo:
RfCi:5.00E+00
SFO:
IUR:
Ingestion:
Dermal:
Inhalation:6.79E-06
Ingestion:
Dermal:
Inhalation:
Non-Cancer Adult Cancer
Total:0.00E+00Total:6.79E-06
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Toluene
CAS:108-88-3
VOC:Y
µg/m3
0.08%0.00%
Concentration :8.00E+02
Mutagen:
RfDo:
RfCi:5.00E+00
SFO:
IUR:
Ingestion:
Dermal:
Inhalation:1.24E-04
Ingestion:
Dermal:
Inhalation:
Non-Cancer Adult Cancer
Total:0.00E+00Total:1.24E-04
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Trichloroethane, 1,1,1-
CAS:71-55-6
VOC:Y
µg/m3
98.47%23.79%
Concentration :3.86E+02
Mutagen:Y
RfDo:
RfCi:2.15E-03
SFO:
IUR:4.10E-06
Ingestion:
Dermal:
Inhalation:1.47E-01
Ingestion:
Dermal:
Inhalation:1.77E-08
Non-Cancer Adult Cancer
Total:1.77E-08Total:1.47E-01
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Trichloroethylene
CAS:79-01-6
VOC:Y
Tuesday, August 29, 2023 Page 8 of 14
RCRA Corrective Action
1.00E-06 1.00E-041
Risk Based Performance Criteria
Default Risk Individual Chemical Default Cumulative Risk-All ChemicalsDefault Hazard Index
WoodbineSite Name:
Program:
Construction
Air
µg/m3
0.01%0.00%
Concentration :5.51E+00
Mutagen:
RfDo:
RfCi:2.00E-01
SFO:
IUR:
Ingestion:
Dermal:
Inhalation:1.99E-05
Ingestion:
Dermal:
Inhalation:
Non-Cancer Adult Cancer
Total:0.00E+00Total:1.99E-05
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Trimethylbenzene, 1,2,4-
CAS:95-63-6
VOC:Y
µg/m3
0.17%0.00%
Concentration :3.10E+01
Mutagen:
RfDo:
RfCi:1.00E-01
SFO:
IUR:
Ingestion:
Dermal:
Inhalation:2.53E-04
Ingestion:
Dermal:
Inhalation:
Non-Cancer Adult Cancer
Total:0.00E+00Total:2.53E-04
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Xylene, m-
CAS:108-38-3
VOC:Y
µg/m3
0.04%0.00%
Concentration :7.00E+00
Mutagen:
RfDo:
RfCi:1.00E-01
SFO:
IUR:
Ingestion:
Dermal:
Inhalation:5.76E-05
Ingestion:
Dermal:
Inhalation:
Non-Cancer Adult Cancer
Total:0.00E+00Total:5.76E-05
% Contribution to Media Risk
Calculated Hazard/Risk
Analyte:Xylene, o-
CAS:95-47-6
VOC:Y
Tuesday, August 29, 2023 Page 9 of 14
RCRA Corrective Action
1.00E-06 1.00E-041
Risk Based Performance Criteria
Default Risk Individual Chemical Default Cumulative Risk-All ChemicalsDefault Hazard Index
WoodbineSite Name:
Program:
Construction
Air
Total Calculated Hazard Index/Risk for
Ingestion:0.00E+00
Dermal:0.00E+00
Inhalation:1.49E-01
Ingestion:0.00E+00
Dermal:0.00E+00
Inhalation:7.46E-08
Non-Cancer Adult Cancer
Total:1.49E-01 Total:7.46E-08
Air
Tuesday, August 29, 2023 Page 10 of 14
RCRA Corrective Action
1.00E-06 1.00E-041
Risk Based Performance Criteria
Default Risk Individual Chemical Default Cumulative Risk-All ChemicalsDefault Hazard Index
WoodbineSite Name:
Program:
Construction
Total Hazard Index/Risk for All Media
Report Summary
Hazard/risk values of zero (0.00+00) are reflective of non-calculated values. Hazard/risk for
zero value analytes must be evaluated outside of quantitative risk assessment.
Air
Hazard RiskCASAnalyte
Hazard/Risk Summary for
Acetone 67-64-1 0.00E+001.85E-06
Benzene 71-43-2 1.76E-092.05E-04
Bromodichloromethane 75-27-4 3.30E-093.26E-04
Carbon Disulfide 75-15-0 0.00E+001.18E-05
Chloroform 67-66-3 5.14E-086.69E-04
Dichloroethane, 1,1-75-34-3 1.11E-100.00E+00
Dichloroethylene, cis-1,2-156-59-2 0.00E+002.43E-04
Dichloroethylene, trans-1,2-156-60-5 0.00E+002.11E-04
Ethylbenzene 100-41-4 2.24E-107.25E-07
Heptane, N-142-82-5 0.00E+008.42E-07
Hexane, N-110-54-3 0.00E+002.24E-06
Isopropanol 67-63-0 0.00E+003.85E-06
Methyl Ethyl Ketone (2-Butanone)78-93-3 0.00E+002.18E-05
Methylene Chloride 75-09-2 1.18E-128.26E-06
Propylene 115-07-1 0.00E+002.05E-06
Styrene 100-42-5 0.00E+001.10E-06
Tetrachloroethylene 127-18-4 1.59E-111.10E-04
Tetrahydrofuran 109-99-9 0.00E+003.53E-06
Toluene 108-88-3 0.00E+006.79E-06
Trichloroethane, 1,1,1-71-55-6 0.00E+001.24E-04
Trichloroethylene 79-01-6 1.77E-081.47E-01
Trimethylbenzene, 1,2,4-95-63-6 0.00E+001.99E-05
Xylene, m-108-38-3 0.00E+002.53E-04
Xylene, o-95-47-6 0.00E+005.76E-05
Tuesday, August 29, 2023 Page 11 of 14
RCRA Corrective Action
1.00E-06 1.00E-041
Risk Based Performance Criteria
Default Risk Individual Chemical Default Cumulative Risk-All ChemicalsDefault Hazard Index
WoodbineSite Name:
Program:
Construction
Ingestion:0.00E+00
Dermal:0.00E+00
Inhalation:1.49E-01
Ingestion:0.00E+00
Dermal:0.00E+00
Inhalation:7.46E-08
Non-Cancer Adult Cancer
Total:1.49E-01 Total:7.46E-08
does not exceed hazard index does not exceed cumulative risk
Construction Exposure Default Values
Description ValueSymbol Units
14.0111Construction Worker Soil Inhalation Dispersion Constant - PhiladelphiaA (unitless)
0.3Construction Worker Soil Adherence FactorAFcw (mg/cm2)
0.5Areal extent of the site or contaminationAs (acres)
25550Construction Worker Averaging Time: 365 x LTATcw (days)
365Construction Worker Averaging TimeATcw (days/yr)
350Construction Worker Averaging Time: EWcw x 7 x EDcwATcw-a (days)
19.6154Construction Worker Soil Inhalation Dispersion Constant - PhiladelphiaB (unitless)
80Construction Worker Body WeightBWcw (kg)
225.3397Construction Worker Soil Inhalation Dispersion Constant - PhiladelphiaC (unitless)
5Construction Worker Days WorkedDWcw (days/week)
1Construction Worker Exposure DurationEDcw (yrs)
250Construction Worker Exposure FrequencyEFcw (days/yrs)
250Construction Worker Air Exposure FrequencyEFcw-a (days/yr)
250Construction Worker Soil Exposure FrequencyEFcw-s (days/yr)
125Construction Worker Soil Exposure Frequency - VRP ONLY - Virginia DEQEFcw-vrp (days/yr)
8Construction Worker Exposure TimeETcw (hrs/day)
8Construction Worker Soil Exposure TimeETcw-s (hrs/day)
50Construction Worker Weeks WorkedEWcw (weeks/yr)
0.194Function Dependent on 0.886 × (Ut/Um)F(x)(unitless)
Tuesday, August 29, 2023 Page 12 of 14
RCRA Corrective Action
1.00E-06 1.00E-041
Risk Based Performance Criteria
Default Risk Individual Chemical Default Cumulative Risk-All ChemicalsDefault Hazard Index
WoodbineSite Name:
Program:
Construction
0.185Dispersion Correction FactorFd (unitless)
330Construction Worker Soil Ingestion RateIRcw (mg/day)
0.433962264150943Total soil porosity: 1-(ρb/ρs)n (unitless)
1266503136.97919Particulate Emission Factor Subchronic - Virginia DEQ calculatedPEFsc (m3/kg)
87.3689772162309Inverse of the ratio of the 1-h geometric mean concentration to the emission flux
along a straight road segment bisecting a square site - Virginia DEQ calculated
Q/C (g/m2-s per
kg/m)
3527Construction Worker Surface AreaSAcw (cm2/day)
30240000Total time over which construction occurs:
EDcw*EWcw*7days/wk*24hrs/day*3600s/hr
Tc (s)
2Trench Air Changes per Hour - Virginia DEQTR-ACH (h)-1
0.25Trench Advection Coefficient Groundwater greater than 15ft - Virginia DEQTR-ACvad (cm3/cm3)
0.001Trench Conversion Factor-1TR-CF1 (L/cm3)
10000Trench Conversion Factor-2TR-CF2 (cm2/m2)
3600Trench Conversion Factor-3TR-CF3 (s/hr)
1000000Trench Conversion Factor-4TR-CF4 (cm3/m3)
2.44Trench Depth - groundwater less Than 15ft - Virginia DEQTR-D-dir (m)
4.57Trench Depth - groundwater greater than 15ft - Virginia DEQTR-D-ind (m)
1Trench - Depth to soil gas vapor source - Virginia DEQTR-Dsg (cm)
125Trench Construction Worker Exposure Frequency - Virginia DEQTR-EFcw (days/yr)
4Trench Construction Worker Exposure Time - Virginia DEQTR-ETcw (hrs/day)
1Trench Construction Worker Events - Virginia DEQTR-EVcw (events/day)
1Trench Fraction of floor through which contaminant can enter - Virginia DEQTR-F (unitless)
30Trench Thickness of Vadose Zone - groundwater greater than 15 ft - Virginia DEQTR-HV (cm)
0.02Trench Construction Worker Groundwater Ingestion Rate - Virginia DEQTR-IRcw (L/day)
0.833Trench Gas-phase mass transfer coefficient of water vapor at 25deg C - Virginia
DEQ
TR-KGH2O (cm/s)
0.002Trench Liquid-phase mass transfer coefficient of oxygen at 25deg C - Virginia DEQTR-KLO2 (cm/s)
2.44Trench Length - Virginia DEQTR-L (m)
488Trench Depth to groundwater - Virginia DEQTR-Lgw (cm)
Tuesday, August 29, 2023 Page 13 of 14
RCRA Corrective Action
1.00E-06 1.00E-041
Risk Based Performance Criteria
Default Risk Individual Chemical Default Cumulative Risk-All ChemicalsDefault Hazard Index
WoodbineSite Name:
Program:
Construction
18Trench Molecular Weight of Water - Virginia DEQTR-MWH2O (unitless)
32Trench Molecular Weight of Oxygen - Virginia DEQTR-MWO2 (unitless)
0.44Trench Porosity in Vadose Zone - groundwater greater than 15ft - Virginia DEQTR-Porvad (cm3/cm3)
0.000082Trench Ideal Gas Constant - Virginia DEQTR-R (atm-m3/mol-K)
77Trench Temperature Fahrenheit - Virginia DEQTR-Temp-F (F)
298Trench Temperature - Virginia DEQTR-Temp-K (K)
0.91Trench Width - Virginia DEQTR-W (m)
0.38Trench Width to Depth Ratio - Virginia DEQTR-W/D (unitless)
4.69Mean Annual Wind SpeedUm (m/s)
11.32Equivalent Threshold Value of Wind Speed at 7mUt (m/s)
0.5V Fraction of Vegetative CoverV (unitless)
0.133962264150943Air filled soil porosity: n-ΘwΘa (unitless)
0.3Water filled soil porosityΘw (unitless)
1.5Dry soil bulk densityρb (kg/L)
2.65Soil particle densityρs (kg/L)
END OF REPORT
Tuesday, August 29, 2023 Page 14 of 14
Appendix D Application For A Waiver Of An Ecological
Risk Assessment
Application for a Waiver of an Ecological Risk Assessment
Woodbine Site, 534, 540, 545, 549, and 585 West 700 South
Salt Lake City, Salt Lake County, Utah
This application is being submitted to request a waiver for performing an ecological risk
assessment at the Woodbine Site, located at 534, 540, 549, and 585 West 700 South, Salt
Lake City, Utah.
In accordance with the Utah Administrative Code (UAC) R315-101, site investigations must
include an evaluation of human health and ecological risk to support risk-based closure. An
ecological risk assessment is warranted when it has been determined that exposure
pathways are potentially complete for ecological receptors. A complete pathway consists of:
1) a source, 2) a mechanism of contaminant release, 3) a receiving or contact medium, 4) a
potential receptor population, and 5) exposure route. Of these five criteria, the most
fundamental is the fourth criterion. In order for a potential receptor population to exist, a
site must contain open areas that would allow plant growth and suitable habitat for wildlife.
Pathways are incomplete for ecological receptors at sites that are completely filled-in with
buildings, concrete, or pavement. For these areas, an ecological risk assessment cannot be
completed.
The Woodbine Site property is nearly completely paved and/or covered in structures. No
significant areas of vegetation are present, and the site is devoid of suitable habitat for
wildlife. Additionally, the immediate vicinity of the site is industrial/commercial, consisting of
paved/concrete lots and industrial-use buildings. The surrounding area does contain limited
trees and grass (mostly in parking strips/sidewalk areas). However, no wildlife at the
property has been observed using the property for permanent habitat or food. Although it is
possible that some species could casually be present (such as birds resting in nearby trees
or crossing the property), it is not plausible that any receptor would forage, nest, or den on
the Woodbine Site property itself due to a lack of vegetation.
As any potentially contaminated soil is located beneath concrete, structures, pavement, or
transported fill material, all potential areas of habitat are unavailable to ecological
receptors. Since there is no complete exposure pathway, an ecological risk assessment is
not deemed required at this facility and a waiver for conducting a quantitative ecological risk
assessment per R315-101.5.3(a)(8) is requested.