OLD WILMINGTON ROAD
GROUNDWATER CONTAMINATION
SUPERFUND SITE
OPERABLE UNIT 1
WEST CALN TOWNSHIP,
CHESTER COUNTY, PENNSYLVANIA
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INTERIM RECORD OF DECISION
United States Environmental Protection Agency
Region 3
1600 John F. Kennedy Boulevard
Philadelphia, PA 19103-2852
April 2023
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OLD WILMINGTON ROAD GROUNDWATER CONTAMINATION
SUPERFUND SITE OPERABLE UNIT 1
WEST CALN TOWNSHIP, CHESTER COUNTY, PENNSYLVANIA
INTERIM RECORD OF DECISION
Table of Contents
DECLARATION 1
DECISION SUMMARY 4
I. SITE NAME, LOCATION, AND DESCRIPTION 4
II. SITE HISTORY AND ENFORCEMENT ACTIVITIES 5
III. HIGHLIGHTS OF COMMUNITY PARTICIPATION 7
IV. SCOPE OF THE SELECTED REMEDY 7
V. SITE CHARACTERISTICS 8
A. Hydrology 8
B. Geology 8
C. Groundwater 9
D. Water Supply 10
VI. CURRENT AND POTENTIAL FUTURE LAND AND RESOURCE USES 10
VII. SUMMARY OF SITE RISKS 10
A. Human Health Risk Assessment Summary 10
B. Summary of Ecological Risk Assessment 16
VIII. REMEDIAL ACTION OBJECTIVES 16
IX SUMMARY OF REMEDIAL ACTION ALTERNATIVES 17
X COMPARATIVE ANALYSIS OF ALTERNATIVES 22
A. Criteria Used to Compare Cleanup Alternatives 22
B. Detailed Analysis of Proposed Remedial Alternatives 23
XI. SELECTED REMEDY 27
A. Summary of the Rationale for the Selected Remedy 28
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B. Summary of the Estimated Costs 28
C. Performance Standards 28
D. Expected Outcome of the Selected Remedy 29
XII. STATUTORY DETERMINATIONS 29
A. Compliance with Applicable or Relevant and Appropriate Requirements 29
B. Cost Effectiveness 30
C. Utilization of Permanent Solutions and Alternative Treatment Technologies to the
Maximum Extent Practicable and Preference for Treatment as a Principal Element
30
D. Five Year Review Requirements 30
E. Documentation of Significant Changes 30
XIII. RESPONSIVENESS SUMMARY 31
APPENDICES
APPENDIX A - ADMINISTRATIVE RECORD INDEX
APPENDIX B - RESPONSIVENESS SUMMARY
APPENDIX C - ARARs AND TBCs FOR SELECTED REMEDY
APPENDIX D - PERFORMANCE STANDARDS FOR RESIDENTIAL WELL WATER
APPENDIX E - CLEANUP LEVELS FOR VAPOR INTRUSION
APPENDIX F - RAGS PART D TABLES
APPENDIX G - PADEP CONCURRENCE LETTER
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INTERIM RECORD OF DECISION
OLD WILMINGTON ROAD GROUNDWATER
CONTAMINATION SUPERFUND SITE
OPERABLE UNIT 1
DECLARATION
The Site is located in West Cain Township, Chester County. The Site was placed on the National Priorities
List (NPL) on February 4, 2000. The National Superfund Database Identification Number is
PAD981938939. The Site consists of four investigation areas and three inter-connected plumes of
contaminated groundwater.
The Site investigations areas are as follows:
• Investigation Area 1 (Area 1) includes a junkyard located on Old Wilmington Road, across the street
from Investigation Area 4.
• Investigation Area 2 (Area 2) is located at the end of Donovan Drive and includes an inactive former
landfill.
• Investigation Area 3 (Area 3) is located right next to Area 1, on Old Wilmington Road, and includes
two stone-filled trenches present on the northwestern edge of the property where liquid wastes were
allegedly disposed.
• Investigation Area 4 (Area 4) is located on the east side of Old Wilmington Road, across the street
from Area 1. This investigation area includes a truck yard which was identified as a possible source
of groundwater contamination.
The three inter-connected plumes of contaminated groundwater consist of the following contaminants of
concern (COCs):
• A plume predominantly consisting of tetrachloroethene (PCE);
• A plume predominantly consisting of trichloroethene (TCE); and
• A plume predominantly consisting of 1,4-Dioxane.
Various inorganic COCs are also present at the Site.
Statement oLBasJ^-am< Pnrnos?
For management of the remedial action, EPA has organized the Site cleanup into two Operable Units (OlJs):
• Operable Unit One (OU-1) is defined by the contaminated groundwater used as drinking water and
volatile organic compound (VOC)-contaminated vapors attributable to the Site-related groundwater
plumes with the potential to migrate from subsurface into residential indoor air
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• Operable Unit Two (OU-2) is defined by the remaining Site-related contamination in soils and
groundwater.
This decision document presents an Interim ROD for an interim remedial action (Selected Remedy) that
addresses OU-1. The Selected Remedy was chosen in accordance with the requirements of the
Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA), as
amended, and, to the extent practicable, the National Oil and Hazardous Substances Pollution
Contingency Plan (NCP), 40 C.F.R. Part 300. This decision document explains the factual and legal
basis for the Selected Remedy for OU-1 at the Site. This ROD is based on the Administrative Record
(AR) for the Site, which was developed in accordance with Section 113 (k) of CERCLA, 42 U.S.C. §
9613(k). This AR file is available for review online at https://semspub.epa.gov/src/collection/03/AR67242,
at the EPA Region 3 Records Center in Philadelphia, Pennsylvania, and at Coatesville Area Public Library
in Coatesville, Pennsylvania. The AR file Index (Appendix A) identifies each document contained in the
AR file upon which the selection of the remedy is based. The signed ROD will become part of the AR for
the Site.
The Pennsylvania Department of Environmental Protection (PADEP) concurs with the Selected Remedy
for OU-1.
Assessment of the Site
The Selected Remedy in this Interim ROD is necessary to protect the public health or welfare or the
environment from actual or threatened releases of hazardous substances into the environment.
Description of the Selected Remedy
The Selected Remedy for OU-1 addresses exposure to Site-related groundwater contamination in residential
drinking water wells as well as vapor intrusion (VI) at affected or potentially affected properties. EPA has
delineated the extent of the PCE, TCE and 1,4-Dioxane plumes and identified an "area of concern" (AOC)
which includes properties impacted or potentially impacted by Site-related COCs. The AOC comprises the
area overlying the groundwater plumes and investigation areas as well as a buffer area around the plumes.
The extent of the buffer area will be determined during the remedial design. A future decision document will
address remaining contamination, including inorganics, present in soils and groundwater at the Site for both
OU-1 and OlJ-2.
The Selected Remedy for OU-1 consists of a public water line, VI mitigation systems, institutional controls
(ICs), and long-term monitoring (LTM). The estimated present value of total costs over a 30-year period for
this remedial action is $7,786,000.
Statutory Determinations
The Selected Remedy is protective of human health and the environment, complies with Federal and
State requirements that are legally applicable or relevant and appropriate to the remedial action, is
cost-effective, and utilizes permanent solutions to the maximum extent practicable.
Because this Selected Remedy will result in hazardous substances remaining on-Site above levels that
allow for unlimited use and unrestricted exposure, a review will be conducted within five years after
commencement of the Selected Remedy to ensure that the remedy continues to provide adequate
protection of human health and the environment. Such reviews will be conducted a minimum of every
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five years thereafter, until EPA determines that hazardous substances remaining at the Site do not
prevent unlimited use and unrestricted exposure at the Site.
Authorizing Signature
This Interim ROD documents the Selected Remedy for OU-1 of the Site. EP A selected this interim remedial
action with the concurrence of the P ADEP.
Digitally signed by PAUL
PAUL LEONARD LEONARD
Date: 2023.04.14 11:47:21 -04 00'
Paul Leonard. Director Date
Superfund and Emergency Management Division
EPA Region 3
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INTERIM RECORD OF DECISION
OLD WILMINGTON ROAD GROUNDWATER CONTAMINATION
SUPERFUND SITE OPERABLE UNIT 1
DECISION SUMMARY
I SITE NAME, LOCATION, AND DESCRIPTION
The Site is located in West Cain Township, Chester County. The Site was placed on the National Priorities
List (NPL) on February 4, 2000. The Site consists of four investigation areas and three inter-connected
plumes of contaminated groundwater.
The Site investigations areas are as follows:
• Investigation Area 1 includes a junkyard located on Old Wilmington Road, across the street from
Investigation Area 4.
• Investigation Area 2 is located at the end of Donovan Drive and includes an inactive former landfill.
• Investigation Area 3 is located right next to Area 1, on Old Wilmington Road, and includes two
stone-filled trenches present on the northwestern edge of the property where liquid wastes were
allegedly disposed.
• Investigation Area 4 is located on the east side of Old Wilmington Road, across the street from Area
1. This investigation area includes a truck yard which was identified as a possible source of
groundwater contamination.
Figure 1: Site Map
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The three inter-connected plumes of contaminated groundwater consist of the following contaminants of
concern (COCs):
• A plume predominantly consisting of tetrachloroethene (PCE);
• A plume predominantly consisting of trichloroethene (TCE); and
• A plume predominantly consisting of 1,4-Dioxane.
Various inorganic COCs are also present at the Site.
Figure 2: Plume Extent
i •. v -
, End of proposed
¦ Water Main
United States
Environmental Protection
Agency
Legend
GROUNDWATER PLUME MAP
PCE, TCE AND 1.4-DIOXANE
OLD WILMINGTON ROAD SITE
SADSBURYVILLE. PENNSYLVANIA
' Proposed Water Main
Tetrachloroethene (PCE) Piume
[Trichloroethene (TCE) Plume
i 1.4-Dioxane Plume
The National Superfund Database Identification Number for the Site is PAD981938939. EPA Region 3 is
the lead agency for the Site, and PADEP is the support agency.
It. SITE HISTORY AND ENFORCEMENT ACTIVITIES
The Site has been the subject of numerous past investigations as a result of multiple complaints of waste
disposal that were investigated by the Chester County Health Department (CCHD) and the Commonwealth
of Pennsylvania during the 1970s and 1980s. Records indicate that a waste disposal permit was never
applied for, while eyewitness accounts additionally reported that tanker trucks were observed discharging
their contents onto the ground adjacent to the landfill, among other areas. Aerial photographs show mounded
material on the landfill sometime between 1975 and 1980. Area 2 subsequently became the subject of a
Pennsylvania Department of Environmental Resources (PADER), now known as PADEP, preliminary
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assessment in December 1986. In 1988, 1 1 residential wells were sampled by EPA as part of a Site
Investigation (referred to hereafter as 1988 Phillips Landfill SI).
Residential well sampling data collected during the 1988 Phillips Landfill SI indicated that the residential
well located on the junkyard site (Area 1) and several other nearby wells, including the well system that
provides drinking water to the residents of the mobile home park, were contaminated with TCE and PCE,
both of which are volatile organic compounds (VOCs), at concentrations exceeding their respective
maximum contaminant levels (MCLs).
Subsequent sampling conducted by PADEP confirmed the presence of VOC contamination in the public
water supply system for the mobile home park which was subsequently determined to be impacted by Area
1. In November 1992, sampling and inspection of the public water supply system for the mobile home park
was conducted. Laboratory results indicated that the mobile home park supply well and a nearby residential
well contained VOCs above applicable MCLs, and the concentration of PCE in the residential well exceeded
the EPA removal action level.
EPA initiated a removal site assessment on February 26, 1993. Based on the results of this assessment, EPA
determined that there was an immediate and significant threat to human health due to elevated
concentrations of hazardous substances, including PCE and TCE, in the drinking water supplies of nearby
residents. On December 21, 1993, EPA commenced a removal action, which focused on providing bottled
water, and later carbon filtration units, to residences affected by groundwater contamination above MCLs.
In 1993, EPA also issued an emergency order to the owner/operator of the mobile home park under the Safe
Drinking Water Act, requiring, among other things, that the owner/operator provide free bottled water to the
mobile home park residents until a drinking water treatment system and other necessary improvements to
the park's water system were installed. In 1996 Perry and Jeanne Phillips, doing business as Phillips Mobile
Home Park, entered into a Partial Consent Decree (1996 Decree) with the U.S. and PADEP, requiring
construction of various water treatment system improvements for the park's residential water supply as well
as delineated sampling and reporting requirements.
As part of the ongoing removal action, EPA also began investigating the source of the groundwater
contamination. Laboratory analytical results from soil gas, soil, and groundwater sampling indicated that an
additional and separate source of VOC contamination existed in Area 3. Those results confirmed eyewitness
reports of separate waste dumping in Area 3 and prompted EPA to identify the area as a potential hazardous
waste site on March 1 1, 1994. Based on these results, EPA investigated Area 3 separately, which confirmed
that two distinct types of groundwater contaminants were present in separate plumes.
On May 4, 1994, EPA approved a request for additional funding to mitigate potential risks posed to
residents via ingestion of groundwater contamination and inhalation of vapors emanating from the areas
adjacent to Investigation Area 1. The May 1994 approval provided for continued response actions initiated
during the ongoing removal activities at the Site, including providing whole-house water treatment units to
residents with VOC contamination above removal action levels; determining the area of origin of the VOC
contamination in order to mitigate the source and characterize the plumes; and providing for continued
monitoring and maintenance of whole-house water treatment units to ensure safe drinking water.
Subsequent to the Site being added to the NPL in 2000, Remedial Investigation (RI) activities were initiated
and consisted of: (1) Hydrogeologic Investigation, (2) Source Area Assessment, (3) Surface Water/Sediment
Assessment, and (4) Ecological Characterization. An RI report (2010 RI) was prepared in 2010. Review of
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the 2010 RI report indicated significant data gaps, primarily caused by analysis of only a limited well network
due to limited Site access. As a result, in order to further study groundwater contamination at the Site, EPA
initiated the Supplemental RI, which was completed in 2022. This supplemental investigation included
performing a baseline round of sampling of all historic wells and stream sampling locations, installation of
new wells at the Site, additional rounds of groundwater sampling, a Site-wide residential sampling event, and
a VI sampling event at homes overlying the plumes. The study found, among other things, that the
groundwater is also contaminated with 1,4-Dioxane, a semivolatile organic compound (SVOC); elevated
concentrations of metals were primarily contained in samples from wells not affected by VOC contamination;
VOC contamination is present at all four investigation areas; and sub-slab soil gas detections of Site-related
substances at several residences indicated possible contaminant migration from groundwater. In summary, the
Supplemental RI concluded that groundwater contamination at the Site presents unacceptable risks to drinking
water supplies and subsurface vapors that may affect residential indoor air.
In 2022, EPA developed a Focused Feasibility Study (FFS) for the Site. The remedial alternatives presented
in the FFS were evaluated by EPA and a Preferred Alternative was proposed in the Proposed Remedial Action
Plan (Proposed Plan) in September 2022. During the public comment period for the Proposed Plan, EPA
obtained new monitoring well and residential well data on per- and polyfluoroalkyl substances (PFAS) at the
Site. EPA continues to investigate PFAS at the Site and will consider this information in future decision
documents.
III. HIGHLIGHTS OF COMMUNITY PARTIC IPATION
Pursuant to Section 113(k)(2)(B) of CERCLA, 42 U.S.C. § 113(k)(2)(B), the Supplemental RI and FFS
reports, the Proposed Plan, and other documents relating to the OU-1 were released to the public for
comment on September 28, 2022. These documents were made available to the public online at
https://semspub.epa.gov/src/collection/03/AR67242, in the EPA Administrative Records Room at EPA's
Region 3 office, and in the Coatesville Area Public Library in Coatesville, Pennsylvania. The notice of
availability of these documents was published in the Daily Local News and a fact sheet detailing the Proposed
Plan was mailed to local citizens on September 28,2022.
A public comment period was held from September 28, 2022 until October 28, 2022. During the public
comment period, EPA received both written and oral comments and has responded to the comments in the
Responsiveness Summary section, which is included as part of this Interim ROD.
EPA held a public meeting at the Wagontown Fire Company, located at 412 W. Kings Highway,
Coatesville, PA 19320, on October 1 1, 2022. During the public meeting, EPA gave a formal presentation
on EPA's Proposed Plan, followed by a "Question and Answer" session where representatives from
EPA answered questions regarding the Site and the Proposed Plan. Responses to all significant
comments recei ved during the public comment period, including those raised at the public meeting, are
provided in the Responsiveness Summary (Appendix B).
IV. SCOPE OF THE SELECTED REMEDY
Several privately owned residential wells are known to be contaminated with Site-related contamination. To
eliminate the risk to residents whose wells are impacted by the Site, current residential water supply systems
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contaminated with Site-related contaminants have been equipped with carbon treatment systems. While
these wells are provided with treatment, other wells in the area, especially those that currently lie in or
adjacent to the groundwater contamination plumes, have the potential to be impacted by Site-related
contaminants in the future. This Interim ROD for OU-1 provides a permanent remedy (Selected Remedy) to
prevent the exposure of affected or potentially affected properties to Site-related groundwater contamination
in residential drinking water wells, which also causes VI concern. EP A has delineated the extent of the
PCE, TCE, and 1,4-dioxane plumes, which have stabilized, and identified an "area of concern" (AOC)
which includes properties impacted or potentially impacted by Site-related COCs. The AOC comprises the
area overlying the plumes and investigation areas as well as a buffer area around the plumes (see Figure 3).
The extent of the buffer area will be determined during the remedial design. Additionally, the Selected
Remedy is more protective of human health because installation of a water line would permanently
eliminate exposure to contaminated groundwater as a drinking water source and protect against potential
emerging contaminants, such as PFAS. Future decision documents will address potential emerging
contaminants and remaining contamination present in soils and groundwater at the Site, for both OU-1 and
OU-2.
V. SITE C HARAC TERISTIC S
The topography of the area slopes gently from the northwest to southeast across the Site. Large portions of
the Site are relatively flat-lying, likely from grading associated with construction and agriculture. There are
a number of steep slopes on the Site which are located immediately adjacent to streams, tributaries, property
lines, and ditches.
A. Hydrology
The major surface water bodies at the Site are Rock Run, the unnamed surface water body located in the
vicinity of Ash Road, and two unnamed tributaries (one to Rock Run and one to Buck Run). Rock Run
flows along the northern and eastern boundaries of the Site from the northwest to the southeast, past a small
pond located along the southeastern side of Ash Road. Runoff from Investigation Areas 1, 3, and 4 flows
southeast toward Rock Run and its unnamed tributary to the south. Overland runoff is collected in a network
of small creeks and swales, and numerous drainage ditches along roadways. Runoff from Area 2 drains to an
unnamed wetland south of Karen Circle.
B. Geology
The Site lies in the Piedmont Physiographic Province, an area underlain by highly deformed metamorphosed
sedimentary rocks, which have been intruded by younger igneous rock bodies. The Mine Ridge formation is
the predominant surface geologic formation in the area, which is found to the south and east of the Site
where it contacts the major rock types found at the Site - Chickies Quartzite and the Baltimore Gneiss.
Other secondary rock formations in the area include serpentinite and pegmatite.
The Chickies Quartzite is a Late Pre-Cambrian to Cambrian-aged granular quartzite with interbedded
quartzose schist. The Chickies encompasses much of the Site and surrounding area. The permeability of the
Chickies Quartzite is generally much lower than that of the Mine Ridge or Baltimore Gneiss. Most water
from this formation is obtained from the fractured weathered zone at the top of bedrock. The formation is
difficult to drill, except in areas where it is heavily weathered. The Baltimore Gneiss (often referred to as
"undifferentiated gneiss") is a Cambrian-aged foliated metamorphic rock in which bands of granular
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minerals alternate with bands of elongate or prismatic minerals, making the rock appear layered. In some
areas, igneous intrusions (pegmatite, gabbro) cause the rock to vary from banded gneiss to a massively
textured igneous rock. The permeability of the Baltimore Gneiss is generally much higher than that of the
Chickies Quartzite.
C. Groundwater
Rock type can significantly affect contaminant transport and groundwater flow velocity, patterns, and fate
and transport. The Mine Ridge Gneiss and the Chickies Quartzite formation are separated by a thrust fault
which bisects the Site. This fault represents the contact between rocks of the Chickies Quartzite and the
Mine Ridge Gneiss. In this thrust fault, older rocks of the Mine Ridge Gneiss were pushed over younger
rocks of the Chickies Quartzite. This thrust fault is significant to Site characterization because it is believed
to be a major controlling influence on contaminant migration and groundwater flow.
Along with the thrust fault identified on the Site, a network of smaller fractures (joints) was identified.
When these fractures become saturated with groundwater, they form a pattern of permeability that results in
preferential contaminant transport and groundwater flow. These joint-related fractures represent a distortion
of normal groundwater flow and can produce preferred contaminant transport and groundwater flow
pathways along a network of fractures.
Groundwater flow at the Site occurs vertically. The shallowest two groundwater zones encountered, which
would represent the overburden aquifer and the first bedrock aquifer, are strongly connected, likely with
only minimal confinement between the two, providing a pathway for downward contaminant migration.
Groundwater flow direction at the Site is generally eastward, with isolated depressions likely caused by
localized pumping of private drinking water wells. Measurements of water levels, observations of geology,
and analytical results indicate, however, that groundwater flows primarily through secondary porosity such
as fractures and faults, rather than through the primary porosity of the formations. Groundwater discharges
to the surface bodies at the Site and provides base flow to the stream system of Rock Run, Buck Run, and
their tributaries.
Finally, groundwater modeling indicates that, in general, groundwater flow originates northwest of the Site
at the topographic high near Debbie Drive, with groundwater from Investigation Areas 1, 3, and 4 flowing
east-northeast toward the houses along Ash Road. Modeling of groundwater flow paths from Area 2 (the
landfill) indicates that groundwater and contaminants would flow generally southward.
Available data show that groundwater at the Site has been impacted by more than one source area.
Investigation Areas 1, 3, and 4, and, to a much lesser extent. Investigation Area 2. Site groundwater contains
VOCs, 1,4-Dioxane, and some metals (see Appendix D for list of COCs). Migration of COCs and their
breakdown products in groundwater has been documented both horizontally and vertically in the aquifer
systems.
VOCs, specifically PCE and TCE, that are dissolved in the groundwater can volatilize into the vapor phase.
PCE and TCE can readily volatilize at the water table because of their relatively high partial pressure. These
vapors can then migrate towards the ground surface. While the direction of vapor movement can be difficult
to predict, soil vapor investigations conducted at the Site have shown that PCE and TCE may accumulate
underneath the basement slabs of residential structures in the AOC. The PCE and TCE vapors can then
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migrate through preferential pathways that include cracks in the basement slab or walls and enter the
residential structure. This occurrence is referred to as vapor intrusion.
D. Water Supply
Most of the residences within the Site use groundwater from private drinking water wells for domestic
purposes. At least 60 drinking water wells supply water to residences and businesses within the Site. Water
wells, including residential, and monitoring wells, are regulated by Chester County under a permitting
process.
Homes in the mobile home park adjacent to the Investigation Area 2 landfill are supplied with water from a
common production well on the property at Investigation Area 1. Water from this common well is
contaminated and receives treatment prior to distribution pursuant to the previously discussed 1996 Decree.
Public water is available in an area northeast of the Site. An 8-inch-diameter water line, owned and operated
by Pennsylvania American Water Company, runs along Airport Road. Public water supplies are regulated
and permitted by Pennsylvania's Safe Drinking Water Program.
VI. CURRENT AND POTENTIAL FUTURE LAND AND RESOURCE USES
The ma jority of the land use is agricultural and wooded, however, residential space and commercial
facilities also exist in the vicinity of the Site. The highest concentrations of residences are located west of
Old Wilmington Road and along Ash Road. Wooded tracts of land, including stream buffers and
undeveloped properties, are found throughout the Site, with the largest wooded area located west of the
landfill. The agricultural properties at the Site lie to the south and west of Ash Road.
The aquifer is the current source of drinking water for the community. The four investigation areas are
currently privately owned and either inactive or used for various commercial uses. The land use controls
associated with the Selected Remedy (see selected ICs) will be consistent with current and any future land
use of the Site properties.
VII. SUMMARY OF SITE RISKS
A. Human Health Risk Assessment Summary
Human health risk assessments (HHRA) were completed in 2010, as part of the 2010 RI, in 2019, and in
2022 as part of the Supplemental RI to re-evaluate the potential threat to human health associated with the
release or potential release of COCs from the Site. Results of the 2022 HHRA were used to identify affected
media, COCs, and potential exposure pathways that may result in unacceptable human health risks.
Appendix F includes a summary of the receptors with risk estimates exceeding risk management
benchmarks under the reasonable maximum exposure (RME) scenario. The results of the updated risk
evaluations are summarized in Table 1 and provided in the Risk Assessment Guidance for Superfund
(RAGS) Part D Table 10s (Appendix F), which present the updated calculations of chemical cancer risks
and non-cancer hazards.
Identification of Chemicals of Concern
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In general, a chemical is selected as a contaminant of potential concern (COPC) and retained for further
quantitative risk evaluation if the maximum detection in a sampled medium exceeds the lowest risk-based
concentration (RBC). Chemicals eliminated from further evaluation are assumed to present minimal risks to
potential human receptors. The analytical data for soil, groundwater, surface water, and sediment were
screened against EPA Regional Screening Levels (RSLs) to determine which substances were required for
quantitative risk calculation. Sub-slab soil gas substances were screened against EPA Vapor Intrusion
Screening Levels (VISLs). CO PCs were selected for surface soil, subsurface soil, groundwater, surface
water, and sediment using the risk-based CO PC screening levels.
Exposure point concentrations (EPCs) were calculated for surface soil, combined surface/subsurface soil,
groundwater, and sediment. No CO PCs were identified for surface water, therefore EPCs were not
calculated for surface water. The evaluation of vapor intrusion risks for specific homes was based on indoor
air and sub-slab sample concentrations.
Exposure Assessment
A conceptual site model (CSM) facilitates consistent and comprehensive evaluation of potential risks to
human health by creating a framework for identifying the pathways by which human receptors may contact
environmental media contaminated by site activities.
The exposure assessment portion of the risk assessment defines and evaluates the type and magnitude of
human exposure to the chemicals present at or migrating from a site. Based on current and potential future
land use at the site, construction workers, industrial workers, and residents were identified as potential
receptors. Groundwater within the study area is used as a drinking water source and several surveys have
been conducted to identify residential wells within the study area that may be impacted by the groundwater
contaminant plume.
Construction workers could be exposed to soil via ingestion, dermal contact, and inhalation and to shallow
groundwater via ingestion, dermal contact, and inhalation. Industrial workers could be exposed to soil via
ingestion, dermal contact, and inhalation, to groundwater if used as a potable source via ingestion, dermal
contact, and inhalation, and to VOCs migrating from a subsurface source. Residential receptors could be
exposed to soil via ingestion, dermal contact, and inhalation, to groundwater if used as a potable source via
ingestion, dermal contact, and inhalation, and to VOCs migrating from a subsurface source.
To provide a full characterization of potential exposure, both RME and central tendency exposures (CTE)
were evaluated in the HHRA.
Exposure to lead was assessed using the following models:
• The latest version of EPA's Integrated Exposure Uptake Biokinetic (IEUBK) Model for lead (version
1.1 Build 11). This model is typically used to evaluate lead exposure assuming a residential land use
scenario.
• EPA's Adult Lead Methodology (2003b and 2017). This methodology is typically used to evaluate
lead exposure assuming a non-residential land use scenario.
The IEUBK Model for lead is designed to estimate blood levels of lead in children (under 7 years of age)
based on either default or site-specific input values for air, drinking water, diet, dust, and soil exposure.
Studies indicate that infants and young children are extremely susceptible to adverse effects from exposure
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to lead. Considerable behavioral and developmental impairments have been noted in children with elevated
blood-lead levels. Historically blood-lead levels greater than 10 micrograms per deciliter (|.ig/dL) were
considered to be a "concern." Current scientific literature on lead toxicity indicates that adverse health
effects are associated with blood-lead (PbB) levels below the long-held target of 10 (.ig/dL. Specifically,
evidence exists of clear cognitive declines in young children with PbB levels between 2 and 8 |.ig/dL (as
referenced in the December 2016 EPA Office of Land and Emergency Management [OLEM] Memo).
Therefore, a value of 5 ug/dL was used as the acceptable blood lead level in this HHRA.
The exposure factors used to estimate intake for the construction worker, industrial worker, and resident are
presented and defined in RAGS Part D Tables in Appendix F.
Toxicity Assessment
The toxicity assessment weighs the evidence regarding the potential for exposure to chemicals to produce
adverse effects in exposed receptors and, when possible, the assessment estimates the relationship between
the exposure to a chemical and the increased likelihood and/or severity of adverse effects. Quantitative
estimates of the relationship between the magnitude and type of exposures and the severity or probability of
human health effects are defined for the identified COPCs. Quantitative toxicity values determined during
this component of the risk assessment are integrated with exposure assessment outputs to characterize the
potential occurrence of adverse health effects for each receptor group.
The reference dose (RfD) is the toxicity value used to evaluate noncarcinogenic health effects for ingestion
and dermal exposures. The reference concentration (RfC) is used to evaluate noncarcinogenic health effects
for inhalation exposures. The RfD and RfC estimate a daily exposure level for a human population that is
unlikely to pose an appreciable risk during a portion or for all of a human lifetime. It is based on a review of
animal and/or human toxicity data with adjustments for various data uncertainties. Carcinogenic effects are
quantified using the cancer slope factor (CSF) for ingestion and dermal exposures and using inhalation unit
risks (IUR) for inhalation exposure that are plausible upper bound estimates of the probability of the
development of cancer per unit intake of the chemical over a lifetime.
Oral RfDs and CSFs and inhalation RfCs and IlJRs used in this HHRA were obtained from the following
primary EPA recommended literature sources using following hierarchy (EPA, 2003c):
• Tier 1 - Integrated Risk Information System (IRIS).
• Tier 2 - EPA Provisional Peer Reviewed Toxicity Values (PPRTVs) - The Office of Research and
Development/National Center for Environmental Assessment (NCEA) Superfund Health Risk
Technical Support Center develops PPRTVs on a chemical-specific basis when requested by EPA's
Superfund program.
• Tier 3 - Other Toxicity Values - These sources include but are not limited to California
Environmental Protection Agency (Cal EPA) toxicity values. Agency for Toxic Substances and
Disease Registry ( ATSDR) values, and the Health Effects Assessment Summary Tables (HEAST).
Toxicological data for the COPCs, including non-carcinogens and carcinogens, are presented in RAGS Part
D Table 5.1 and Table 5.2 for non-carcinogenic effects and in RAGS Part D Table 6.1 and Table 6.2 for
carcinogenic effects (Appendix F).
Risk Characterization
12
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Quantitative estimates of noncarcinogenic and carcinogenic risks (His and incremental lifetime cancer risk
(ILCRs), respectively) were developed for potential human receptors contacting site environmental media
(Appendix F). For carcinogens, risks are generally expressed as the incremental probability of an
individual's developing cancer over a lifetime as a result of exposure to the carcinogen. Excess lifetime
cancer risk is calculated from the following equation:
Risk = GDI x SF
where: risk = a unitless probability (e.g., 2 x 10-5) of an individual's developing cancer
GDI = chronic daily intake averaged over 70 years (mg/kg-day)
SF = slope factor, expressed as (mg/kg-day)-1.
These risks are probabilities that usually are expressed in scientific notation (e.g., lxl0"6). An excess
lifetime cancer risk of lxlO"6 indicates that an individual experiencing the reasonable maximum exposure
estimate has a 1 in 1,000,000 chance of developing cancer as a result of site-related exposure. This is
referred to as an "excess lifetime cancer risk" because it would be in addition to the risks of cancer
individuals face from other causes such as smoking or exposure to too much sun. The chance of an
individual's developing cancer from all other causes has been estimated to be as high as one in three. EPA's
generally acceptable risk range for site-related exposures is 10"4 to 10"6.
The potential for noncarcinogenic effects is evaluated by comparing an exposure level over a specified time
period (e.g., life-time) with a RfD derived for a similar exposure period. An RfD represents a level that an
individual may be exposed to that is not expected to cause any deleterious effect. The ratio of exposure to
toxicity is called a hazard quotient (HQ). An HQ<1 indicates that a receptor's dose of a single contaminant
is less than the RfD, and that toxic noncarcinogenic effects from that chemical are unlikely. The Hazard
Index (HI) is generated by adding the HQs for all chemical(s) of concern that affect the same target organ
(e.g., liver) or that act through the same mechanism of action within a medium or across all media to which
a given individual may reasonably be exposed. An HI< 1 indicates that, based on the sum of all HQ's from
different contaminants and exposure routes, toxic noncarcinogenic effects from all contaminants are An HI
> 1 indicates that site-related exposures may present a risk to human health.
The HQ is calculated as follows:
Non-cancer HQ = CDI/RfD
where: GDI = Chronic daily intake
RfD = reference dose.
GDI and RfD are expressed in the same units and represent the same exposure period (i.e., chronic,
subchronic, or short-term).
Table 1 presents a summary of the receptors with risk estimates exceeding risk management benchmarks
under the RME scenario. Under the RME scenario for current and future land use, cumulative ILCRs for
future lifelong residents exceed the acceptable cancer risk of lxlO"4. Benzo(a)pyrene, dieldrin, naphthalene,
and arsenic in surface/subsurface soil; and chloroform, PCE, TCE, vinyl chloride, 1,4-dioxane, BEHP, and
arsenic in groundwater were the contributors to the ILCR for the future lifelong residents.
13
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Table 1: Summary of Health Risks for Reasonable Maximum Exposures
Ki-i r|)liii->
i m
IT
H
i
Current Industrial
Workers
Surface Soil
3E-06
None
0.2
I
¦Tone
Current Child
Residents
Surface Soil
(see lifetime)
-
3(3)
None
Sediment
(see lifetime)
-
0.3
None
Total
(see lifetime)
-
3(3)
-
Current Adult
Residents
Surface Soil
(see lifetime)
-
0.3
None
Sediment
(see lifetime)
--
0.04
None
Total
(see lifetime)
-
0.3
--
Current Lifelong
Residents
Surface Soil
2E-05
None
NA
--
Sediment
NC<4)
--
NA
--
Total
2E-05
-
NA
-
Combined
6E-07
None
Aluminum,
Surface/Subsurface Soil
Manganese
Workers
Groundwater
4E-07
None
3
Trichloroethene
Total
1E-06
-
5
-
Future Industrial
Workers
Combined
Surface/Subsurface Soil
3E-06
None
0.3
None
Groundwater
8E-05
None
7
Aluminum, Cobalt,
Manganese
Total
9E-05
--
7
--
Combined
Surface/Subsurface Soil
(see lifetime)
-
5
Cobalt, Copper, Iron,
Manganese, Thallium
Tetrachloroethene,
Trichloroethene,
Future Child Resident
Groundwater
(see lifetime)
-
31
Caprolactam, 2-
Hexanone,
Aluminum, Arsenic,
Cobalt, Iron, Lead,
Manganese, Thallium
Sediment
(see lifetime)
-
0.3
None
Total
(see lifetime)
--
36
--
Combined
Surface/Subsurface Soil
(see lifetime)
-
0.5
Thallium
Tetrachloroethene,
Trichloroethene, 2-
Future Adult
Residents
Groundwater
(see lifetime)
—
23
Hexanone,
Aluminum, Arsenic,
Cobalt, Iron,
Manganese, Thallium
Sediment
(see lifetime)
--
0.04
None
Total
(see lifetime)
-
23
-
Combined
Surface/Subsurface Soil
1E-05
Benzo(a)pyrene,
Dieldrin, Naphthalene,
Arsenic
NA
-
Chloroform,
T etrachloroethene,
Future Lifelong
Residents
Groundwater
3E-04
Trichloroethene,
Vinyl Chloride, 1,4-
Dioxane,
Bis(2-
ethylhexyl)phthalate,
Arsenic
NA
-
Sediment
NC<4)
-
NA
-
Total
3E-04
-
NA
-
14
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Lifelong Residents
Groundwater
(Vapor Intrusion)
6E-05
( lllllilllllllillllN III
( (IIKITI1 III Risk' 1
Chloroform,
T etrachloroethene,
Trichloroethene,
Vinyl Chloride
1 - A chemical is considered to a major contributor to the cancer risk if the cumulative cancer risk is greater than lxlO"4 and the chemical
specific cancer risk is greater than lxlO"6.
2 - A chemical is considered to be a major contributor to the hazard index if the cumulative target organ hazard index is greater
than 1 and the chemical specific hazard index is greater than 0.1.
3 - Target organs HE less than 1.
4 - NC - No carcinogenic COPCs were identified for sediment, therefore cancer risks could not be calculated.
Cumulative His on a target organ basis for current industrial workers, current child residents, and current
adult residents were less than the acceptable level of 1. Cumulative His for future construction workers,
future industrial workers, future child residents, and future adult residents exceeded the acceptable level of
1. Exposures to aluminum and manganese in surface/subsurface soil and TCE in groundwater were the
contributors to the cumulative HI for future construction workers. Aluminum, cobalt, and manganese in
groundwater were the contributors to the HI for future industrial workers. Cobalt, copper, iron, manganese,
and thallium in surface/subsurface soil and PCE, TCE, caprolactam, 2-hexanone, aluminum, arsenic, cobalt,
iron, manganese, and thallium were the contributors to the HI for future child residents. Thallium in
surface/subsurface soil and PCE, TCE, 2-hexanone, aluminum, arsenic, cobalt, iron, manganese, and
thallium in groundwater were the contributors to the HI for the future adult resident. PCE and TCE pose the
greatest potential unacceptable risk to human health at the Site due to the extent of migration
Vapor Intrusion
Risks from exposures to VI were calculated using two approaches. The first approach involved evaluating
risks using the most recently collected groundwater samples. Assuming residential exposure, all sampling
points (wells) had ILCRs less than or within EPA's target risk range. All but three sampling points had an
HI less than 1. The HI exceeded one for monitoring wells MW03, MW05, and MW08S. TCE was the
primary contributor to the potential VI risks at MW03 and MW08S, while PCE was the primary contributor
to the potential VI risks at MW05.
The second approach relied upon evaluating VI risks for specific homes based on contaminant
concentrations detected during indoor air and sub-slab sampling performed in April 2019. EPA's evaluation
of the results identified current unacceptable risks in one house based upon TCE concentrations detected in
indoor air and sub-slab samples. The maximum TCE level reported for indoor air at this home was 2.7
micrograms per cubic meter (|ig/m3), which exceeded its EPA RSL of 0.21 [ig/m3. The TCE concentration
detected in the sub-slab vapor sample (220 (ig/m3) collected at this home resulted in an HQ of 3, indicating a
potential future VI risk. The sub-slab sample collected from another house contained PCE (170 (ig/m3) at a
concentration that exceeded its VISL value based on an ILCR of 1 xlO"6 and an HQ of 1, indicating potential
future risks from VI PCE exposure may also be of concern. However, PCE concentrations currently detected
in indoor air of this home were less than the applicable screening levels.
Risk from Lead
15
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Residential exposures to lead in soil and groundwater were evaluated using EPA's Integrated Exposure
Uptake Biokinetic (IEUBK) lead model. The results of the IEUBK model indicate that risks for current
child residents exposed to lead in surface soil do not exceed the EPA goal of no more than 5% of children
exceeding a 5 microgram per deciliter (jig/dL) blood-lead level. However, the IEUBK model also indicates
that risks to future child residents exposed to lead in both groundwater and surface/subsurface soil exceed
the EP A goal; lead in groundwater was responsible for the exceedance of the benchmark for residential
exposures to lead.
Construction and industrial worker exposures to lead in soil were evaluated using EPA's Adult Lead
Methodology. These results indicate that risks to current industrial workers and future industrial workers
and construction workers do not exceed the EPA goal of no more than 5% of children (fetuses of exposed
women) exceeding a 5 (ig/dL blood-lead level.
B. Summary of Ecological Risk Assessment
A Screening Level Ecological Risk Assessment (SLERA) was conducted as part of the 2010 RI. Surface
water and sediment samples were collected and analyzed as part of the SLERA. The objective was to
position sampling stations upstream/off-Site to characterize background conditions and to sample
representative surface waters downstream of the Site to allow a spatial characterization of biological
condition. The SLERA concluded that COCs at the Site did not pose unacceptable risks to ecological
receptors, so the ecological risk assessment was not updated for the Supplemental RI completed in 2022.
Ecological risk will be addressed in the ROD for OU-2.
C. Summary of Site Risks
In summary, the HHRA for the Site demonstrates the presence of unacceptable risk to human health, and
that remedial actions are necessary to reduce the risks to within or below EPA's acceptable risk range. EPA
has identified the COCs that pose the greatest potential unacceptable risk to human health and the
environment at the Site. Therefore, EPA has determined that the Selected Remedy for this Interim ROD is
necessary to protect the public health or welfare or the environment from actual or threatened releases of
hazardous substances into the environment.
VIII. REMEDIAL AC TION OBJECTIVES
Remedial Action Objectives (RAOs) are specific goals developed to address the Site COCs and exposure
pathways to protect human health and the environment. These objectives are based on available information
and standards, such as applicable or relevant and appropriate requirements (ARARs), to-be-considered
(TBC) guidance, and Site-specific risk-based levels.
The RAO established for drinking water:
• Prevent potential human exposure to Site-related contaminants in groundwater through ingestion
above levels that pose an unacceptable risk for residential use.
The RAOs established for soil vapor and indoor air:
• Protect current and future residents from adverse health effects that may result from exposure to
VOC-contaminated vapors attributable to the Site-related groundwater plumes.
• Mitigate potential contaminant migration from subsurface VI into residential indoor air.
16
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EPA guidance states that "[a]n interim action is limited in scope and only addresses areas/media that also
will be addressed by a final site/operable unit ROD."1 Therefore, the foregoing RAOs reflect the limited
scope of this interim remedial action. By preventing human exposure to contaminated groundwater, the
interim remedial action will reduce Site risks by ensuring the public is not exposed or potentially exposed to
Site-related contaminants in groundwater at concentrations exceeding MCLs, PA medium-specific
concentrations (MSCs), or RSLs, as appropriate.
IX. SUMMARY OF REMEDIAL ACTION ALTERNATIVES
The Superfund law (CERCLA) requires that any remedy selected to address contamination at a site must be
protective of human health and the environment, cost-effective, in compliance with promulgated standards
or requirements that are determined to be ARARs, and consistent with the NCP. The three Alternatives, as
shown in Table 1, were evaluated to meet the RAOs for this interim remedial action.
Table 1: Evaluated Alternatives
Alternative
Description
1
No Action
2
Point-of-Entry Treatment Systems (POETS), VI Mitigation Systems, ICs, and
LTM
3
Public Water Line, VI Mitigation Systems, ICs, and LTM.
Alternative 1: NO ACTION
Consideration of this alternative is required by the NCP at 40 C.F.R. § 300.430(e)(6). Under Alternative 1,
no additional remedial action would be taken at the Site. The "no action" alternative serves as a basis
against which each of the other proposed remedial alternatives can be compared. Under this alternative,
the Site would remain in its present condition. Current and future residents would remain exposed to Site-
related contaminants in residential drinking water wells and to VOC-contaminated vapors attributable to the
Site-related groundwater plumes. The potential for contaminant migration from subsurface VI into
residential indoor air would remain, and existing POETs would no longer be maintained by EPA.
Alternative 2: POINT-OF-ENTRY TREATMENT SYSTEMS (POETS), VI MITIGATION
SYSTEMS, ICs, AND LTM
POETS
Under this alternative, groundwater pumped from the affected, or potentially affected, residential drinking
water wells would be treated before it reaches human receptors to meet the performance standards2 for Site
1 "A Guide to Preparing Superfund Proposed Plans, Records of Decision, and Other Remedy Selection Decision Documents"
(Office of Solid Waste and Emergency Response) (July 1999), at p. 8-2.
2 Generally, for a particular remedy component, performance standards define what that component must accomplish. Appendix
D (Performance Standards for Residential Well Water) identifies the contaminant concentration levels that would need to be met
by the POETS, if selected. For the Selected Remedy, treatment of the public water to be supplied to Site residents will be
conducted off-Site by the water company. However, as discussed below, these performance standards will be utilized, along
with other criteria (such as a buffer area), to determine which residences fall within the AOC—to be offered connection to the
water line. See also, Section XI.C, below.
17
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COCs in residential wells (see Appendix D) through the use of POETS. Several residences along Ash Road
and Old Wilmington Road have previously been provided with POETS where COC levels have exceeded
applicable performance standards. In addition, homes within the nearby mobile home park are also provided
with treated water from a single, common well pursuant to the 1996 Decree issued to the park
owner/operators. Under this alternative, the residents of the mobile home park would continue to receive
drinking water from the common well regulated by PADEP's Safe Drinking Water Program, and the current
POETS installed by EPA would continue to be maintained until the groundwater plumes are restored to any
future selected performance standards. New POETS would also be installed at locations within the AOC.
For cost estimating purposes, up to a total of 60 existing and new POETS may be installed and/or
maintained within the AOC, which includes residences at the Site located on Old Wilmington Road, Ash
Road, Parkesburg Road, and Donovan Drive. Additional residential well sampling may be conducted to
determine if additional residential wells would require a POETS to prevent users from consuming
contaminated groundwater.
The new POETS offered would be the same as those previously installed by EPA and currently in place at
affected homes. The POETS would consist of an inline particulate filter for pre-filtering, dual in-series
granular activated carbon (GAC) units for removing organic compounds, and an ultraviolet (UV) radiation
unit for disinfection. To assess the effectiveness of the POETS, the systems" pre-treatment, mid-treatment
and post-treatment water would be routinely monitored for VOCs, 1,4-Dioxane, and metals. Based on
operation and maintenance (O&M) of existing POETS at this Site, these systems are capable of treating low
concentrations of 1,4-Dioxane. Initially, all POETS installed and previously installed would be monitored
on a quarterly basis.
This alternative would also include periodic replacement of carbon units, pre-filter cartridge replacement, as
needed, and non-routine repairs of treatment units for both existing and newly installed systems. If
monitoring of the POETS indicates that performance standards are not being met by the current POETS,
additional cost-effective treatment systems capable of addressing Site-related COCs in residential wells
could also be installed in affected residences. However, to date, through routine monitoring, the existing
systems installed at homes at this Site have been effective at removing Site-related COCs that exceed
performance standards.
Vapor Intrusion
VI mitigation systems would be installed at residences where Site-related COC concentrations in indoor air
or sub-slab vapor are detected at levels exceeding cleanup levels for VI (See Appendix E). In affected
homes with a basement with concrete floors, a sub-slab depressurization (SSD) system would be installed.
In homes with partial concrete, stone, or earthen floors, a combination of an impermeable vapor barrier (for
the earthen floor) and an SSD system would be installed. SSD systems would not provide treatment of
indoor air. EPA will determine which homes will receive VI mitigation systems using the results of
previous or future VI sampling. VI confirmatory sampling would be conducted to ensure the mitigation
systems are functioning properly. Alternative 2 may also include monitoring of indoor air quality at affected
homes containing VI mitigation systems.
In affected homes where an SSD system cannot be installed due to the home lacking a basement, indoor
residential air would be treated using carbon filtration units to reduce VOC vapors. These units would be
equipped with fans and GAC filters. The fan draws air through the filter, which adsorbs and removes VOC
(and possibly other organic compound) vapors. Typical GAC filters would contain 15 pounds of activated
carbon and would last from 9 to 12 months with filters being replaced once on an annual basis.
18
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Long-term Monitoring
Residential drinking water wells with POETS would be monitored via a LTM program to evaluate the
effectiveness of the POETS in reducing COCs to respective performance standards and to determine
whether additional cost-effective treatment systems capable of addressing Site-related COCs in residential
drinking water wells need to be installed in affected residences. A total of approximately 60 residential wells
with POETS would be sampled quarterly and analyzed for all Site COCs, as described above. Sampling
frequency would initially be performed quarterly until EPA, in consultation with PADEP, determines that
sampling can be performed less frequently.
LTM for VI would consist of a minimum of annual maintenance of the VI mitigation systems at affected
residences. LTM may also consist of collecting air samples at the affected residences, where access is
granted, to assess the performance of the VI mitigation systems, and to ensure the systems are functioning
properly. Sampling frequency will initially be performed annually until EPA, in consultation with PADEP,
determines that sampling can be performed less frequently. O&M would need to continue until vapors
resulting from the contaminated groundwater meet cleanup levels. If additional buildings are constructed at
the Site, these buildings would also be included in the LTM program annual assessments, as appropriate.
Sampling results would be evaluated to assess whether there have been changes in contaminant status and
whether additional response actions are warranted. Site conditions and risks would be reviewed every five
years since contaminants would be left in place.
Institutional Controls
ICs would be implemented to prevent exposure to Site-related contaminants in groundwater by deterring the
use of untreated groundwater at properties within the AOC and to restrict any impact on the Site remedy.
The ICs would consist of the following: 1) deter the use of untreated groundwater for potable purposes; 2)
prohibit the installation of any new groundwater wells until remediation standards and protectiveness have
been achieved, unless EPA, in consultation with PADEP, gives prior written approval for such installation;
and, 3) prohibit all activities that would interfere with any component of the remedial action, unless EPA, in
consultation with PADEP, gives prior written approval for such activity.
In addition, ICs would prevent potential indoor air exposure to Site-related COCs that may volatilize from
the underlying groundwater plumes. To prevent such exposure, EPA, in consultation with PADEP, would
require prior notice of any construction of new residential or other structures intended for occupancy over or
within 100 feet of the contaminated groundwater plumes. The then current owner of such property would be
required to submit to EPA and PADEP (and local authorities as necessary) a plan to address indoor air risk
due to VI. If a new structure is constructed and it is determined that a VI mitigation system is needed,
installation of the VI mitigation system will be the responsibility of the owner.
To implement the ICs, a number of mechanisms, or layered mechanisms, could be utilized, in consultation
with PADEP. This process would involve working with the affected property owners, and, as necessary,
with local government, to implement the above activity-and-use limitations, in consultation with PADEP,
through proprietary controls (e.g., environmental covenants), governmental controls (e.g., local
rules/regulations, zoning ordinances or building codes), enforcement instruments (e.g., Federal or State
administrative orders), and/or informational devices (e.g., letters/fact sheets to the community or property
owners, deed notices, the PA Activity and Use Limitations Registry, community outreach, or advisories).
For example. Chapter 500 of the Chester County Health Department Rules and Regulations, Section 501,
19
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contains certain restrictions on wells. These rules/regulations require persons to obtain a permit to install,
maintain, or repair a water supply well; include water quality limits that must be met; restrict permitting of
wells within delineated Plume Areas of contaminated sites unless approved by EPA or PADEP; and require
written documentation that the installation of a well will not have any impact on the plume or remediation
effort as well as requirements for water source replacement and decommissioning of wells.
Alternative 3: PUBLIC WATER LINE, VI Mitigation Systems, ICs, and LTM
Public Water Line
Under Alternative 3, all homes within the AOC would be offered the opportunity to connect to a newly
constructed public water line. This alternative would prevent exposure to Site-related COCs by providing a
permanent alternative clean water supply to properties currently using drinking water wells within the area
of groundwater contamination.
The total number of residences to be offered connections to the water line will be determined during the
design of the water line; however, for cost estimating purposes, EP A assumes that approximately 60
residences would be connected to the water line. Based on current information, the residences located on
Old Wilmington Road, Ash Road, Parkesburg Road, and Donovan Drive, within the AOC for the COCs
identified in this Interim ROD, as delineated in Figure 3, would be offered connections to the water line.
EPA will pay for the lateral connection to the water line for the above-described properties; however, the
monthly water bill, once the residence is connected, will be the responsibility of the homeowner. Lateral
connections to the water line will only be offered to the affected or potentially affected residences at the
time of construction of the water line; connections will not be provided after the construction of the water
line has been completed.
If a homeowner chooses not to connect to the water line once it becomes available and the residence has a
POETS installed by EPA, EPA will not continue to monitor and maintain the POETS after construction of
the water line is completed. Existing POETS for those choosing to connect to the water line would be
monitored and maintained until connection to the newly constructed public water line is completed.
If a resident elects to be connected to the water line, existing drinking water wells would be completely
disconnected from the drinking water system. EPA will pay for disconnecting residential wells from the
drinking water supply. Disconnected wells would either be decommissioned or could be used for non-
potable purposes only under certain conditions as permitted by CCHD regulations. See CCHD Rules and
Regulations, Chapter 500, § 501.16 (Water Source Replacements) and § 501.16.4. Continuing to use wells
for non-potable uses would reduce the usage and cost of the public water supplied to the resident. If a
homeowner chooses to keep their residential well for non-potable uses after connection to the water line, any
required maintenance of the residential well would be the responsibility of the homeowner and the resident
must comply with the requirements of the above CCHD Regulations, including submitting a written request
to the CCHD for approval to continue to maintain the well and receiving written approval from CCHD to
maintain the well.
Additionally, a West Cain Township ordinance requires mobile home parks to connect to a water line, if one
is available. As a result, the mobile home park on-Site would be connected to the water line, which would
replace the common well that currently services the mobile home park. All connections to the municipal
20
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water system would require coordination with State authorities, local authorities, and residents.
EPA currently estimates that approximately 16,530 linear feet of 8-inch pipe would be installed to serve as
the water main extension. Installation of the distribution lines would require excavation along the roadways.
In addition, per township ordinance, fire hydrants would be installed, one every 600 feet, along the water
supply line. Public water distribution lines would be installed at least 36 inches below ground surface to
prevent freezing. The actual design of the water distribution system would require an engineering evaluation
to determine actual water usage, friction losses, fire protection needs, and the future growth of the service
area.
Figure 3: Route of Public Water Line
y-f r
'*¦ &S- 7 [¦ *'¦} I&r*5_ w 9
' Iff
% Vjh
-j#Tie-in to Existing Water Main
fjL m "/
M: iL
; -
¦ ' r
Legend
I I Area of Concern
G Fire Hydrant
Existing Water Main
Proposed Water Main
I i Study Areas
& ( I: I I §33
Jtf Mr
PROPOSED WATER MAIN EXTENSION
PREFERRED ALTERNATIVE
OLD WILMINGTON ROAD SITE
SADSBURYVILLE, PENNSYLVANIA
Vapor Intrusion
This component is identical to the VI component described for Alternative 2.
Long-term Monitoring
A public water line does not require LTM because public water is routinely sampled by the water provider
and regulated under applicable laws and regulations. LTM of the VI mitigation systems is identical to the
LTM described for Alternative 2. Site conditions and associated risks would be reviewed every five years
as part of the five-year review process because contaminants would be left in place.
21
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Institutional Controls
This component is identical to the ICs described for Alternative 2.
Common Elements of Alternatives 2 and 3
Common components for Alternatives 2 and 3 are as follows:
• Installation of VI mitigation systems at residences where concentrations of Site contaminants are
detected in indoor air and/or sub-slab vapor at levels exceeding acceptable EPA risk levels and
PADEP screening values.
• LTM would assess the progress and effectiveness of remedial actions.
• ICs to restrict potable use of untreated groundwater within the contaminated plume along with a
prohibition on the installation of any new groundwater wells, to prohibit interference with the Site
interim remedy, and to prevent exposure to Site-related COCs via VI from contaminants in the
groundwater plume.
• Five-year reviews to assess the implementation and performance of the remedy to ensure it remains
protective.
X. COMPARATIVE ANALYSIS OF ALTERNATIVES
A. Criteria Used to Compare Cleanup Alternatives
The remedial alternatives have been evaluated against the nine decision criteria set forth in the NCP, 40
C.F.R. § 300.430(e)(9)(iii) and listed in Table 3 below. These nine criteria are organized into three
categories: threshold criteria, primary balancing criteria, and modifying criteria. Threshold criteria must be
satisfied in order for an alternative to be eligible for selection. Primary balancing criteria are used to weigh
major trade-offs among alternatives. Modifying criteria are formally taken into account after public
comment has been received on the Proposed Plan.
In the remedial decision-making process, EPA describes the relative performance of each alternative against
the evaluation criteria and notes how each alternative compares to the other alternatives under consideration.
A detailed analysis of alternatives can be found in the FFS, which is in the Administrative Record file for
the Site.
Table 2: Evaluation Criteria for Superfund Remedial Alternatives
1. Overall Protection of Human Health and the Environment determines
whether an alternative can adequately protect human health and the environment by
eliminating, reducing, or controlling exposures to hazardous substances, pollutants
or contaminants to levels that do not pose an unacceptable risk.
2. Compliance with ARARs evaluates whether an alternative meets Federal and
more stringent State environmental laws or facility siting laws, or whether a waiver
isJiisliiieiJ
22
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Primary Balancing Criteria
3. Long-term Effectiveness and Permanence considers the ability of an
alternative to maintain protection of human health and the environment over time.
4. Reduction of Toxicity, Mobility, or Volume of Contaminants through
Treatment evaluates an alternative's use of treatment to reduce the harmful effects
of principal contaminants, their ability to move in the environment, and the amount
of contamination present.
5. Short-term Effectiveness considers the length of time needed to implement an
alternative and the risks the alternative poses to workers, residents, and the
environment during implementation.
6. Implementability considers the technical and administrative feasibility of
implementing an alternative, including factors such as the relative availability of
goods and services.
7. Cost includes the estimated capital and annual operation and maintenance costs,
as well as present worth cost of an alternative. Present worth cost is the total cost of
an alternative over time in today's dollar value. Cost estimates are expected to be
accurate within a range of +50 to -30 percent.
Modifying
Criteria
8. State/ Support Agency Acceptance considers whether the State agrees with
EPA's analyses and recommendations, as described in the Feasibility Study and
Proposed Plan.
9. Community Acceptance considers whether the local community agrees with
EPA's analyses and preferred alternative. Comments received on the Proposed Plan
are an important indicator of community acceptance.
B. Detailed Analysis of Proposed Remedial Alternatives
1. Overall Protection of Human Health and the Environment
Alternative 1 (No Action) must be evaluated in accordance with CERCLA and the NCP to serve as a basis
for comparison with the other alternatives. Alternative 1 would not provide any protection of human health
and the environment because the identified risks in residential well drinking water currently not being
treated by a POETS, soil vapor and indoor air would not be addressed. This alternative would not achieve
RAOs for residential well drinking water and VI. COCs would remain at the Site at concentrations
exceeding acceptable risk levels. Alternative 1 does not meet the threshold criterion of protectiveness and
will not, therefore, be considered further.
Alternative 2 would protect human health receptors by providing safe drinking water to affected residents,
addressing VI risks, and limiting exposure to contaminated groundwater and contaminated indoor air
through ICs. However, POETS can fail if not properly maintained and monitored and result in short-term
exposure until maintenance is performed. Potential exposure to contaminated indoor air would be reduced to
acceptable levels by VI mitigation systems. The excess risk that would result from the use of untreated
contaminated residential well water would be reduced to acceptable levels by the POETS if they are
properly maintained. Long-term monitoring would be conducted to assess the performance of the POETS to
ensure performance standards are met.
Alternative 3 would protect human health receptors by providing a permanent public water supply (with
mandated monitoring requirements for the water provider) to affected residents, addressing VI risks, and
limiting exposure to contaminated groundwater and contaminated indoor air through ICs. Although both
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Alternatives 2 and 3 would provide drinking water that is required to comply with drinking water standards.
Alternative 3 would be more protective of human health because installation of the public water supply
would permanently eliminate exposure to contaminated groundwater as a drinking water source and protect
against potential emerging contaminants, such as PFAS. Exposure to potential Site-related vapor intrusion
in indoor air would be eliminated by providing VI mitigation systems for those residences impacted by
elevated concentrations of COCs in sub-slab vapor. ICs would be implemented to restrict the use of
untreated contaminated residential well water for potable purposes and limit soil gas vapor in new
construction.
2, Compliance with ARARs
Section 121(d) of CERCLA, 42 U.S.C. § 9621(d), and the NCP at 40 C.F.R. § 300.430(f)(l)(ii)(B), require
that remedial actions at CERCLA sites at least attain legally applicable or relevant and appropriate Federal
and State requirements, standards of control, and other substantive environmental protection requirements,
criteria, or limitations promulgated under Federal or State law, which are collectively referred to as
"ARARs," unless such ARARs are waived under Section 121(d)(4) of CERCLA, 42 U.S.C. § 9621(d)(4),
and the NCP at 40 C.F.R. § 300.430(f)(l)(ii)(C).
"Applicable" requirements are those cleanup standards, standards of control, and other substantive
requirements, criteria, or limitations promulgated under Federal environmental or State environmental or
facility-siting laws that specifically address a hazardous substance, pollutant, contaminant, remedial action,
location, or other circumstance at a CERCLA site. Only those State standards that are identified by a State in
a timely manner and that are more stringent than Federal requirements may be applicable.
"Relevant and appropriate" requirements are those cleanup standards, standards of control, and other
substantive requirements, criteria, or limitations promulgated under Federal environmental or State
environmental or facility-siting laws that, while not "applicable" to a hazardous substance, pollutant,
contaminant, remedial action, location, or other circumstance at a CERCLA site, address problems or
situations sufficiently similar to those encountered at the CERCLA site that their use is well-suited to the
particular site. Only those State standards that are identified by a State in a timely manner and that are more
stringent than Federal requirements may be relevant and appropriate.
EPA also considers to-be-considered materials (TBCs), along with ARARs. TBCs are non-promulgated
criteria, advisories, or guidance, issued by Federal or State government that are not legally binding and do
not have the status of potential ARARs. However, TBCs may be considered during development of
remedial alternatives. EPA may use TBCs in determining the necessary level of cleanup for protection of
human health or the environment when ARARs do not exist for particular contaminants.
ARARs for remedial action alternatives can be classified into one of the following three functional groups:
• Chemical-Specific: Health-risk-based numerical values or methodologies that establish concentration or
discharge limits for particular contaminants. Often, these ARARs are used to determine the extent of site
remediation. In general, chemical-specific requirements are set for a single chemical or a closely related
group of chemicals. Examples include MCLs, promulgated under the Safe Drinking Water Act (SDWA)
and any more stringent Pennsylvania medium-specific concentrations (PA MSCs). Potential Federal and
more stringent State chemical-specific ARARs are identified in Appendix C.
• Location-Specific: Requirements that restrict remedial actions based on the characteristics of the Site or
its immediate environment. Examples of these areas regulated under various Federal laws include
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floodplains, wetlands, and locations where historically significant cultural resources are present. Potential
Federal and more stringent State location-specific ARARs identified are presented in Appendix C.
• Action-Specific: Requirements that set controls or restrictions on the design, implementation, and
performance levels (including discharge limits) of activities related to the management of hazardous
substances, pollutants, or contaminants. These action-specific requirements do not in themselves
determine the remedial alternative; rather, they indicate how a selected alternative must be achieved. An
example of action-specific ARARs include the substantive requirements of the Resource Conservation
and Recovery Act (RCRA) regulations for generation, characterization, and management of hazardous
wastes. Potential Federal and more stringent State action-specific ARARs and TBCs are presented in
Appendix C.
For Alternative 2, chemical-specific ARARs for the drinking water of affected residents would be achieved
via the POETS. Alternative 2 would also comply with all location-specific and action-specific ARARs
specific to this limited action.
For Alternative 3, there are no chemical-specific ARARs for this interim action relating to the actual
treatment of public water to be supplied to Site residents via the water line because that treatment will be
performed entirely off-Site by Pennsylvania American Water, a public water system provider. Nevertheless,
Pennsylvania American Water is required to meet all applicable requirements, including treatment of
drinking water to all applicable standards. EPA has, however, identified chemical-specific ARARs for
Alternative 3 which are relevant and appropriate, along with other criteria, to determining (during design)
the actual scope of the AOC—that is, which residences are impacted, or potentially impacted, by Site-related
groundwater contamination, and as a result will be offered connection to the newly-constructed water line.
In addition, remedial activities for Alternative 3 would be designed to comply with location-specific and
action-specific ARARs identified for this interim remedial action (see Appendix C).
3. Long-Term Effectiveness and Permanence
Alternative 2 would provide long-term effectiveness via POETS, VI mitigation systems, and ICs. ICs would
prohibit property owners from using untreated contaminated residential well water as a potable supply and
limit exposure to soil gas vapor in new construction. The provision of POETS would eliminate or reduce
risks resulting from the potable use of impacted residential well water. Long-term operation and
maintenance required under Alternative 2 would include periodic servicing of the treatment units
(replacement of activated carbon, and UV bulbs). The spent carbon would need to be collected and returned
for regeneration or appropriate disposal. Risks through exposure to contaminated indoor air would be
reduced or eliminated by VI mitigation systems. LTM would effectively determine the status of residential
well water and assess the performance of the POETS as well as assessing VI mitigation systems.
Alternative 3 would prevent continued exposure to Site-related contaminants in drinking water supplies and
protect against new or emerging contaminants, such as PFAS. Potential residential well water and VI
exposures to human receptors would be reduced or eliminated by providing a public water supply and
providing VI mitigation systems. The provision of a public water line would permanently eliminate
unacceptable risks resulting from the use of contaminated residential well water with current or future
contaminants. Additionally, the POETS provided under Alternative 2 have the potential to fail and result in
short-term exposure until maintenance is performed, making Alternative 3 more effective in the long-term.
Indoor air may be initially monitored annually and then less frequently as determined by EPA, in
consultation with PADEP. O&M would need to continue until vapors resulting from the contaminated
25
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groundwater meet cleanup criteria. Risks from exposure to contaminated indoor air would be reduced to
acceptable levels by the VI mitigation systems.
4. Reduction of Toxicity, Mobility, or Volume through Treatment
Alternative 2 and Alternative 3 would not reduce the toxicity, mobility, and volume of contaminated
groundwater at the Site since these alternatives do not treat the contaminated groundwater. Groundwater will
be addressed in a future OU-2 ROD. Alternative 2 and 3 would eliminate exposure to COCs present in
indoor air using VI mitigation systems. Alternative 2 would reduce exposure to Site COCs in impacted
residential wells through the use of POETs and Alternative 3 would eliminate exposure to impacted
residential wells with a public water line.
5. Short-Term Effectiveness
Implementation of Alternative 2 would only minimally impact the local community or the environment in
the short-term. No significant remediation or construction impacts would be realized other than measures
taken at individual homes. Exposure of workers to COC concentrations during installations and subsequent
O&M of POETS and VI mitigation systems would be minimized by wearing appropriate personal protective
equipment and complying with Site-specific health and safety procedures.
Implementation of Alternative 3 would pose some short-term risks to the local community, the remedial
workers, or to the environment. During construction, the delivery of pipes, roadway excavation, and
installation of the public water line would likely cause some hindrances to local vehicular traffic and some
congestion. Establishment of proper construction traffic controls (e.g., flashing lights, signs, flags), as
necessary, would minimize the chance of accidents. The greatest impact to the community, particularly
nearby residents, would be noise and dust. Construction would be restricted to reasonable hours, and dust
would be controlled using controls such as dust suppression by wetting. Proper construction and industrial
safety practices would be implemented during installation of VI mitigation systems, the public water line,
and connections of the public water supply line to individual homes.
6. Implementability
Both Alternatives 2 and 3 are readily implementable, however. Alternative 3 may take longer to implement
given the coordination required for construction. The POET and VI mitigation systems can be readily
obtained and installed, and qualified firms are available for this work. Common industrial techniques and
equipment could be used for installation and O&M of these systems. Sampling and analysis of residential
well water would be readily implementable, with appropriate coordination with the homeowner. Although
POETS are already in place at some residences currently impacted by contaminated groundwater, all
POETS installed would require regular maintenance for a presumed period of 30 years, or until Site COC
performance standards are met.
The water line and lateral water service connections could be installed using standard construction
techniques and equipment. However, coordination with the water company, municipa 1/township authorities,
other local agencies, and affected property owners would be needed to construct the water line and connect
residences.
7. Cost
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The estimated cost information for Alternatives 2 and 3, as summarized below, was developed using a
presumed 30-year period and assumed that 60 homes would have POETS installed or a connection to a
water line. Capital costs were estimated for construction, remedial design, work plan development,
construction management, administration, and contingency. Annual O&M costs were also estimated. The
present worth costs of each proposed alternative were determined as expressed in today's dollars. Total
estimated costs, including capital and annual O&M costs are presented below with an accuracy of -30% to
+50%. See Appendix B of the FFS for detailed Cost Estimates.
Table 3: Estimated Costs of Alternatives 2 and 3
Capital
Costs
Annual O&M
Costs
Five-Year Review
Present-Worth Cost
Alternative 2
$884,800
range from
$438,300 to
$840,800
$40,000
$1 1,694,000
Alternative 3
$7,500,300
$14,000
$40,000
$7,786,000
8. State Acceptance
EPA has coordinated closely with PADEP in the preparation and evaluation of this Interim ROD. PADEP
concurs with the Selected Remedy for OU-1 (Appendix G).
9, Community Acceptance
EPA received a variety of comments and questions concerning the proposed water line. A majority of the
comments received from the local community expressed support for EPA's Preferred Alternative. Some of
the comments from the local community identified a preference for the POETS. Community comments and
EPA's response to such comments are included in the Responsiveness Summary section of the Interim ROD
for OU-1.
XI. SELECTED REMEDY
The Selected Remedy for OU-1 is Alternative 3, Public Water Line, VI Mitigation Systems, ICs, and LTM,
as described in detail in Section IX, Alternative 3, above. Under this interim remedial action, EPA will:
• Offer to connect all properties within the AOC, i.e., those properties whose residential wells are
currently contaminated with Site-related COCs, as well as those properties whose residential wells
could potentially become contaminated with Site-related COCs, to a newly constructed public water
line;
• Offer to provide VI mitigation systems at residences where COC concentrations in indoor air are
detected at levels exceeding cleanup levels for VI;
• Perform LTM of the VI mitigation systems to assess the effectiveness of the systems; and
• Implement ICs to prevent exposure to Site-related contaminants in groundwater by deterring the use
of untreated groundwater at properties within the AOC, to restrict any impact on the Site remedy,
and to prevent exposure to Site-related COCs via VI through a notification and reporting process
relating to new construction in potentially affected areas.
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A. Summary of the Rationale for the Selected Remedy
Alternative 3 is more protective of human health than Alternative 2 because extension of the public water
supply would permanently eliminate the potential use of contaminated groundwater as a drinking water
source and protect against potential emerging contaminants, such as PFAS. Additionally, Alternative 3
would provide drinking water that is required to comply with drinking water standards. The POETS
provided under Alternative 2 can fail and result in short-term exposure until maintenance is performed,
making Alternative 3 more effective in the long-term. Alternative 3 is also readily implementable with
relatively limited short-term impacts and more cost-effective compared to Alternative 2.
Based on the information available at this time, EPA has concluded that the Selected Remedy (Alternative 3:
Public Water Line, VI Mitigation Systems, ICs, and LTM) meets the threshold criteria and provides the best
balance of trade-offs when compared to the other alternative for OU-1 with respect to the balancing criteria.
EPA expects the Selected Remedy to satisfy the following statutory requirements of CERCLA Section
121(b): 1) to be protective of human health and the environment; 2) to comply with ARARs (or justify a
waiver); 3) to be cost-effective; and 4) to utilize permanent solutions and alternative treatment technologies
or resource recovery technologies to the maximum extent practicable. With respect to the fifth statutory
requirement, i.e., to satisfy the preference for treatment as a principal element (or justify not meeting the
preference), the Selected Remedy does not satisfy the preference for treatment as a principal element.
However, it does permanently eliminate or reduce the exposure pathway to contaminated groundwater via
residential wells and VI into homes. The final remedial action for the Site, which will be proposed in a
future Proposed Plan for OU-2 and subject to public participation requirements, will address the remaining
contaminated media at the Site, including contaminated soil and groundwater.
B. Summary of the Estimated Costs
The cost of Alternative 3 is estimated to be $7,786,000, which is less than the estimated cost of
$1 1,694,000 for Alternative 2.
C. Performance Standards
For the Selected Remedy under this Interim ROD for OU-1, the performance standards for addressing COCs
in residential well water are identified in Appendix D. As discussed above, these performance standards do
not apply to the off-Site treatment, under applicable law, of public water to be supplied by PA American
Water to Site residents via the newly installed water line. These performance standards are, however,
contaminant concentration levels that will be used during remedial design, among other criteria, to delineate
the AOC. Homes in the AOC will be offered a water line connection (currently depicted in Figure 3). The
AOC is defined as the area overlying the Site groundwater plumes and investigation areas as well as a buffer
area around the plumes. The buffer area will also be determined more precisely during the design of the
water line. All homes within the AOC will be offered a connection to the water line.
For this interim remedial action, performance standards for COCs in contaminated residential well water,
measured in micrograms per liter (ug/L), were established to delineate the AOC for placement of the water
line to protect human health. These performance standards were primarily based on Federal MCLs or more
stringent P A MSCs. If MCLs or MSCs were not available, then performance standards were developed
based on EPA RSLs, which are risk-based (tapwater RSLs based on ILCR of 1E-5 or HQ of 0.5) unless
background levels or the analytical detection limits were higher. It should be noted that EPA RSLs are non-
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mandatory standards which can, nevertheless, be used as the drinking water standards for the affected
residences at the Site, as necessary to ensure protection of public health.
Cleanup levels for the VI pathway were based on EPA RSLs and Vapor Intrusion Screening Levels (VISLs),
and PADEP soil gas and indoor air screening values. It should be noted that EPA RSLs and VISLs and
PADEP soil gas and indoor air screening values are non-mandatory standards. Cleanup levels selected for
VI are identified in Appendix E.
D. Expected Outcome of the Selected Remedy
The Selected Remedy is expected to meet all RAOs for this Interim ROD.
The RAO established for drinking water:
• Prevents potential human exposure to Site-related contaminants in groundwater through ingestion
above levels that pose an unacceptable risk for residential use.
RAOs established for soil vapor and indoor air:
• Protects current and future residents from adverse health effects that may result from exposure to
VOC-contaminated vapors attributable to the Site-related groundwater plumes.
• Mitigates potential contaminant migration from subsurface VI into residential indoor air.
XII. STATUTORY DETERMINATIONS
The OU-1 Selected Remedy is protective of human health and the environment, complies with Federal
and State requirements that are legally applicable or relevant and appropriate to the remedial action, is
cost-effective, and utilizes permanent solutions to the maximum extent practicable.
Because the Selected Remedy will result in hazardous substances remaining on site above levels that
allow for unlimited use and unrestricted exposure, a review will be conducted within five years after
commencement of the Selected Remedy to ensure that the remedy continues to provide adequate
protection of human health and the environment. Such reviews will be conducted a minimum of every
five years thereafter, until EPA determines that hazardous substances remaining at the Site do not
prevent unlimited use and unrestricted exposure at the Site.
A. Compliance with Applicable or Relevant and Appropriate Requirements
An interim action must comply with (or waive) those Federal and State requirements that are applicable or
relevant and appropriate to the limited-scope action. Therefore, the focus is only on those ARARs specific
to this interim action (e.g., chemical-specific ARARs associated with POETS or hazardous waste
management regulations during remedy implementation). While the final remedial action for OU-2 will
address the remaining Site-related contamination in soil and groundwater, this interim remedial action for
OU-1 will implement limited action to prevent human exposure to contaminated groundwater in residential
wells and mitigate VI infiltration emanating from the groundwater. The final remedial action for OU-2,
after any necessary public participation requirements are met, will address the remaining unacceptable risks
presented by the Site.
A complete list of ARARs and TBCs for the Selected Remedy for OU-1 is provided in Appendix C. The
major ARARs identified therein include, but are not limited to:
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• Maximum Contaminant Levels (MCLs), 40 C.F.R. §§ 141.61 and 141.62, which establish health-
based standards for certain organics and inorganics for public drinking water, to be used as
standards to delineate the AOC for placement of the water line.
• PA Statewide Health Standards, Medium-Specific Concentrations (MSCs), 25 PA Code
§250.304, to be used as standards to delineate the AOC for placement of the water line where
there are no MCLs.
• The substantive standards under PA Safe Drinking Water Regulations, 25 PA Code Chapter 109,
Subchapter F, that are relevant to design and construction of a water line and/or laterals.
• Substantive PA Standards applicable to generators of hazardous waste, as defined by 25 PA Code
§ 261 a.3(b), during remedial action.
• Substantive PA requirements for erosion and sediment control, to be applied during the
construction of the water line.
B. Cost Effectiveness
The NCP at 40 C.F.R. § 300.430(f)(l)(ii)(D), requires EPA to evaluate cost-effectiveness by comparing
all the alternatives meeting the threshold criteria: protection of human health and the environment; and
compliance with ARARs against long-term effectiveness and permanence.
The Selected Remedy is cost-effective in providing overall protection of human health and the environment
by limiting the risk posed by Site COCs and meets all other requirements of CERCLA and the NCP at a cost
that is proportional to the other alternatives that were evaluated. Further, the Selected Remedy is readily
implementable and provides a high degree of both short- and long-term effectiveness. The estimated
present value of the selected remedial action is approximately $7,786,000.
C. Utilization of Permanent Solutions and Alternative Treatment Technologies to the
Maximum Extent Practicable and Preference for Treatnient as a Principal
Element
The Selected Remedy is an interim remedial action and is not intended to treat contamination or
provide a permanent solution to contamination in groundwater. A future decision document will address
remaining contamination present in soils and groundwater at the Site, for both OU-1 and OU-2
D. Five Year Review Requirements
Section 121(c) of CERCLA and Section 300.430(f)(4)(ii) of the NCP require review of a remedy if the
remedy results in hazardous substances, pollutants, or contaminants remaining on-site above levels that
allow for unlimited use and unrestricted exposure. Any such review must be conducted no less often
than every five years after initiation of the remedial action.
Because hazardous substances will remain at the Site, the review described by Section 121(c) of
CERCLA and Section 300.430(f)(4)(ii) of the NCP will be conducted no less often than every five
years after initiation of the remedial action.
E. Documentation of Significant Changes
The Proposed Plan was released for public comment on September 28, 2022. EPA has reviewed all
comments submitted during the public comment period and determined that no significant changes were
30
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necessary or appropriate to the remedy, as originally identified in the Proposed Plan.
XIII. RESPONSIVENESS SUMMARY
The 30-day public comment period opened on September 28, 2022 and closed on October 28, 2022.
During this time, EPA received a variety of comments and questions, including those raised at the
public meeting. Responses to significant comments received during the public comment period can be
found in the Responsiveness Summary included in this Interim Record of Decision as Appendix B.
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APPENDIX A
ADMINISTRATIVE RECORD INDEX
32
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UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
REGION 111
1600 John F. Kennedy Blvd.
Philadelphia, Pennsylvania 19103
OLD WILMINGTON ROAD GW CONTAMINATION
REMEDIAL ADMINISTRATIVE RECORD FILE
INDEX OF DOCUMENTS
AVAILABLE 9/28/2022, UPDATED //2023
https://semspub.epa.gov/src/collection/03/AR67242
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Introduction
The "Administrative Record" is the collection of documents which form the basis for the U. S.
Environmental Protection Agency's (EPA) selection of a response action at a Superfund site.
Superfund is the name given to the Comprehensive Environmental Response, Compensation,
and Liability Act (CERCLA) which can be found in Title 42 of the U.S. Code (U.S.C.) at Sections
9601 through 9675. Response actions under Superfund can be either "removal actions" or
"remedial actions." As the EPA decides what to do at the site of a release of hazardous
substances, the EPA compiles documents concerning the site and EPA's decision into an
"Administrative Record File." Documents may be added to the Administrative Record File from
time to time. Once the EPA Regional Administrator or the Regional Administrator's delegate
signs the decision document memorializing the selection of an action, the documents which
form the basis for the selection of an action are known as the "Administrative Record." An
Administrative Record file is required by CERCLA, as amended by the Superfund Amendments
and Reauthorization Act (SARA).
The Administrative Record will be available for public review during normal business hours in an
electronic computer imaged format at the selected repository and by appointment only at the
Environmental Protection Agency (EPA), Region 3 office which is located at the address given on
the cover page. The Administrative Record is treated as a non-circulating reference document.
Individuals may review documents contained in the Administrative Record, according to the
procedures at the local repository and at the EPA Region 3 office. The Administrative Record
will be maintained at the repository until further notice. EPA may send additional documents to
the repository as work progresses at the Site. The EPA may hold formal public comment periods
at certain stages of the response process. The public is urged to use the formal public comment
periods to submit written comments to the EPA regarding the actions at the Site.
Except as explained below, this index and the record were compiled in accordance with the
EPA's Revised Guidance on Compiling Administrative Records for CERCLA Response Actions,
EPA/OSRE/OEM/OSRTI (September 20, 2010), and/or in accordance with Superfund Removal
Procedures Public Participation Guidance for On-Scene Coordinators: Community Relations and
the Administrative Record, OSWER 9360.3-05 (July 1992), and/or the National Oil and
Hazardous Substances Pollution Contingency Plan (NCP), 40 CFR Part 300. Consistent with 40
CFR Sections 300.805 (a) (2), and 300.810 (a) (2), Region 3 has listed, in the Administrative
Record Index (or in bibliographies of documents listed in the Index), guidance documents which
may form a basis for the selection of this response action (EPA Guidance Documents, Non-Site
Specific). Unless the guidance documents indexed were generated specifically for the Site, the
guidance documents may not be present in the Administrative Record. However, it should be
noted that the EPA does maintain an extensive collection of Superfund response action
guidance documents available in electronic format on the EPA website at:
https://www.epa.eov/superfund/superfund-policv-guidance-and-laws.
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Additionally, the EPA guidance related to Superfund cleanup enforcement may be found on the
website at the following address:
http://cfpub.epa.gov/compliance/resources/policies/cleanup/superfund.
This page is titled, "Superfund Cleanup Policies and Guidance."
The Administrative Record is listed in chronological order with the earliest dated document at
the top and followed by documents which may be "Undated."
Throughout the Administrative Record File, EPA has redacted certain documents to protect
against the disclosure of potential confidential business information and/or information
which may involve personal identifiable information or a protected interest, The redactions
are evident from the face of the particular document and the word "Redacted" appears in the
title on the index.
Documents listed as bibliographic sources for other documents in the record might not be
listed separately in the Site Index.
The documents in the Old Wilmington Road GW Contamination Removal Administrative
Record File dated 9/3/2019 are herein incorporated by reference, and the index of documents
is attached.
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OLD WILIMINGTON ROAD OU 1 REMEDIAL ADMINISTRATIVE RECORD FILE
GW CONTAMINATION INDEX OF DOCUMENTS In CHRONOLOGICAL Order
Updated //2023
DOC ID
DOC DATE
TITLE
PAGE COUNT
ADDRESSEE NAME
AUTHOR NAME
2335756
09/26/1996
PARTIAL CONSENT DECREE - CIVIL ACTION NO. 95-5578 -
PERRY PHILLIPS MOBILE HOME PARK
22
BUCKWALTER,WAYNE (WERNER WOOD &
BUCKWALTER) | HERMAN,STEVEN,A
(EPA) | MCCABE,W MICHAEL
(EPA) | MENTZINGER,RICHARD (US
ATTORNEY OFFICE) | PHILLIPS,JEANNE
(PERRY PHILLIPS MOBILE HOME
PARK) | PHILLIPS,PERRY (PERRY PHILLIPS
MOBILE HOME PARK) |SCHIFFER,LOIS,J
(US DEPT OF JUSTICE)
2335755
12/13/2000
REDACTED PUBLIC HEALTH ASSESSMENT
46
(ATSDR) | (PA DEPT OF HEALTH)
2335752
07/16/2015
REDACTED SAMPLING & ANALYSIS PLAN (SAP) FOR
SUPPLEMENTAL REMEDIAL INVESTIGATION (Rl) ACTIVITIES
113
(EPA)
(TETRATECH)
2335757
03/18/2022
PA STATE HISTORIC PRESERVATION OFFICE ENVIRONMENTAL
REVIEW SUMMARY LETTER
2
OKORN,BARBARA (EPA)
DIEHL,EMMA (PA STATE HISTORIC
PRESERVATION OFFICE)
2335759
05/01/2022
REDACTED SUPPLEMENTAL REMEDIAL INVESTIGATION (Rl)
REPORT - MAIN REPORT, TABLES & FIGURES
173
(EPA)
(TETRA TECH)
2335761
05/01/2022
REDACTED SUPPLEMENTAL REMEDIAL INVESTIGATION (Rl)
REPORT - APPENDIX A - BORING LOGS & WELL CONSTRUCTION
LOGS - 2016 INVESTIGATION
70
(EPA)
(TETRATECH)
2335763
05/01/2022
REDACTED SUPPLEMENTAL REMEDIAL INVESTIGATION (Rl)
REPORT - APPENDIX B - GEOPHYSICAL LOGS - 2016
INVESTIGATION
81
(EPA)
(TETRATECH)
2335765
05/01/2022
REDACTED SUPPLEMENTAL REMEDIAL INVESTIGATION (Rl)
REPORT - APPENDIX C - PACKER TEST ANALYTICAL RESULTS
118
(EPA)
(TETRA TECH)
2335766
05/01/2022
SUPPLEMENTAL REMEDIAL INVESTIGATION (Rl) REPORT-
APPENDIX D - GROUNDWATER SAMPLING LOGS
59
(EPA)
(TETRATECH)
2335768
05/01/2022
REDACTED SUPPLEMENTAL REMEDIAL INVESTIGATION (Rl)
REPORT - APPENDIX E - HUMAN HEALTH RISK ASSESSMENT
(HHRA)
812
(EPA)
(TETRATECH)
2335770
05/01/2022
REDACTED SUPPLEMENTAL REMEDIAL INVESTIGATION (Rl)
REPORT - APPENDIX F - REMEDIAL INVESTIGATION - 2010
7052
(EPA)
(TETRATECH)
2335772
05/01/2022
REDACTED SUPPLEMENTAL REMEDIAL INVESTIGATION (Rl)
REPORT - APPENDIX G - RAW ANALYTICAL DATA
872
(EPA)
(TETRATECH)
4
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OLD WILIMINGTON ROAD OU 1 REMEDIAL ADMINISTRATIVE RECORD FILE
GW CONTAMINATION INDEX OF DOCUMENTS In CHRONOLOGICAL Order
Updated //2023
DOC ID
DOC DATE
TITLE
PAGE COUNT
ADDRESSEE NAME
AUTHOR NAME
2335774
05/01/2022
REDACTED SUPPLEMENTAL REMEDIAL INVESTIGATION (Rl)
REPORT - APPENDIX H - VAPOR INTRUSION SAMPLING RESULTS
- 2019
156
(EPA)
(TETRATECH)
2335750
06/01/2022
REDACTED FOCUSED FEASIBILITY STUDY (FFS)
117
(EPA)
(TETRATECH)
2336313
09/28/2022
OU 1 PROPOSED REMEDIAL ACTION PLAN (PRAP)
35
(EPA)
2342539
09/28/2022
PUBLIC NOTICE: PROPOSED CLEANUP PLAN AVAILABLE FOR
PUBLIC COMMENT
1
(EPA)
2336319
10/01/2022
COMMUNITY UPDATE: EPA PROPOSES INTERIM CLEANUP IN A
PROPOSED PLAN
4
(EPA)
2342527
10/11/2022
OU 1 PROPOSED REMEDIAL ACTION PLAN (PRAP) PUBLIC
MEETING TRANSCRIPT
118
(LEXITAS LEGAL)
2342529
10/16/2022
REDACTED PUBLIC COMMENT ON OU 1 PROPOSED REMEDIAL
ACTION PLAN (PRAP)
1
SHANDRUK,IRENE (EPA)
(RESIDENT)
2342531
10/21/2022
REDACTED PUBLIC COMMENT ON OU 1 PROPOSED REMEDIAL
ACTION PLAN (PRAP)
1
SHANDRUK,IRENE (EPA)
(RESIDENT)
2342526
04/05/2023
PADEP LETTER OF CONCURRENCE WITH OU 1 INTERIM
RECORD OF DECISION (ROD)
2
LEONARD,PAUL (EPA)
PATTERSON,PATRICK (PA DEPT OF
ENVIRONMENTAL PROTECTION (PADEP))
5
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OLD WILMINGTON ROAD GW CONTAMINATION
REMOVAL ADMINISTRATIVE RECORD FILE * A
INDEX OF DOCUMENTS
I. FACTUAL INFORMATION/DATA
1. Sample results taken from the Perry Phillips Mobile
Home Park, 8/88 through 11/92. P. 100001-100002.
2. Pennsylvania Department of Environmental Resources
(PADER) Safe Drinking Water Act, Inorganic/Organic
Chemical and Radiological Analysis, Perry Phillips
Landfill, Contamination Identification numbers 2969,
2976, 2977, 2980, 2981, 2982, 2984, and 2990, 6/5/91
through 11/13/92. P. 100003-100015. Four Special
Analysis Reports are attached.
3. Result Summary package of Volatile Organic Analysis
Data, sample numbers A1431 through A1439, 4/16/92.
P. 100016-100025.
4. Report: EPA Region III Central Regional Laboratory,
Perry Phillips Mobile Home Park, SDWA AUH03N0AF,
REQ9300 013, prepared by U.S. EPA, 12/30/92.
P. 100026-100040.
5. Letter to Mr. Perry Phillips from Mr. Bill Foster,
U.S. EPA, re: Results of samples taken from the
Phillips Household and the Perry Phillips Mobile Home
Park, 1/20/93. P. 100041-100042.
6. Emergency Response Notification System (ERNS) Incident
Notification Report, Perry Phillips Landfill, 1/21/93.
P. 100043-100043.
7. Memorandum to Mr. Gregg Crystall, U.S. EPA, from Mr.
Bill Foster, U.S. EPA, re: Site background
information, 1/21/93. P. 100044-100044.
Administrative Record File available 4/1/94, updated
4/13/99 and 9/3/19.
A This site was formerly referred to as Perry Phillips
Landfill.
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8. U.S. EPA Pollution Report #1, Perry Phillip Landfill,
3/2/93. P. 100045-100045.
9. Analytical Report Number 1303013, prepared by Roy F.
Weston, Inc., 3/18/93. P. 100046-100059.
10. Memorandum to Mr. Mike Towle, U.S. EPA, from Ms.
Marian Murphy, Roy F. Weston, Inc. , re: Transmittal
of a report reviewing the data package for 11 water
samples and 1 field blank collected on March 2, 1992,
3/23/93. P. 100060-100090. The review report is
attached.
11. Memorandum to Mr. Mike Towle, U.S. EPA, from Mr.
Christopher P. Guy, Roy F. Weston, Inc., re: Summary
of a Technical Assistance Team (TAT) site inspection
visit to collect water samples, 7/8/93. P. 100091-
100093. A site map is attached.
12. U.S. EPA Pollution Report #2, Perry Phillip Landfill,
9/9/93. P. 100094-100094.
13. Princeton Testing Laboratory Inc., samp1e analysis
summary for volatile organics, priority pollutants,
and EPA 624, 12/15/93. P. 100095-100105.
14. U.S. EPA Pollution Report #3, Perry Phillip Landfill,
12/20/93. P. 100106-100106.
15. Summary of Section 1431 of the Safe Drinking Water Act
proposed to be enforced for the site, (undated).
P. 100107-100107.
16. Figure 5.3, Home Well Samp1e Locations, Perry Phillips
Landfill, prepared by NUS Corporation, (undated) .
P. 100108-100112. The following are attached:
a. Figure 2.2, Site Sketch;
b. Figure 2.3, Site Sketch;
c. a Samp1e Log;
d. a Samp1e Data Summary.
17. Organic Data Validation Report for Case * *
Number 47227, Samp1e Delivery Group Number C07P6,
12/22/17. P. 100113-100163. A December 26, 2018
transmittal memorandum and November 2017
Samp1e Summary Report are attached.
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18. Organic Data Validation Report for Case
Number 47227, Sample Delivery Group Number C07L7,
1/2/18. P. 100164-100225. A February 8, 2018
transmittal memorandum and November 2017 Sample
Summary Report are attached.
19. Organic Data Validation Report for Case
Number 47227, Sample Delivery Group Number C07L8,
1/19/18. P. 100226-100283. A January 26, 2018
transmittal memorandum and November 2017 Sample
Summary Report are attached.
20. Organic Data Validation Report for Case
Number 47227, Sample Delivery Group Number C07Q8,
1/26/18. P. 100284-100344. A February 8, 2018
transmittal memorandum and November 2017 Sample
Summary Report are attached.
21. Organic Data Validation Report for Case
Number 47227, Sample Delivery Group Number MC07L7,
1/29/18. P. 100345-100383. A February 14, 2018
transmittal memorandum and November 2017 Sample
Summary Report are attached.
22. Organic Data Validation Report for Case
Number 47227, Sample Delivery Group Number MC07R4,
1/29/18. P. 100384-100419. A February 14, 2018
transmittal memorandum and November 2017 Sample
Summary Report are attached.
23. Organic Data Validation Report for Case
Number 47227, Sample Delivery Group Number MC07S8,
1/29/18. P. 100420-100463. A February 14, 2018
transmittal memorandum and November 2017 Sample
Summary Report are attached.
Document has been redacted due to confidential
business information and/or to protect the privacy of
individuals. Redactions are evident from the face of
the document.
3
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24. Organic Data Validation Report for Case * *
Number 47227, Sample Delivery Group Number MC07L8,
1/30/18. P. 100464-100506. A February 14, 2018
transmittal memorandum and November 2017 Sample
Summary Report are attached.
25. Organic Data Validation Report for Case * *
Number 47227, Sample Delivery Group Number MC07P1,
1/30/18. P. 100507-100531. A February 14, 2018
transmittal memorandum and November 2017 Sample
Summary Report are attached.
26. Organic Data Validation Report for Case * *
Number 47227, Sample Delivery Group Number MC07P3,
1/30/18. P. 100532-100574. A February 14, 2018
transmittal memorandum and November 2017 Sample
Summary Report are attached.
27. Organic Data Validation Report for Case * *
Number 47227, Sample Delivery Group Number MC0B18,
1/31/18. P. 100575-100592. A February 14, 2018
transmittal memorandum and November 2017 Sample
Summary Report are attached.
28. Organic Data Validation Report for Case * *
Number 47227, Sample Delivery Group Number C07W0,
2/1/18. P. 100593-100636. A February 13, 2018
transmittal memorandum and November 2017 Sample
Summary Report are attached.
29. Electronic Memorandum to Mr. Eduardo Rovira, U.S. EPA,
from Mr. Rombel Arquines, U.S. EPA, re: Sampling
results for lead on residential property, 4/16/18.
P. 100637-100637.
30. Electronic Memorandum to Ms. Dawn Ioven, U.S. EPA, and
Mr. Eduardo Rovira, U.S. EPA, from Mr. Martin
Gehlhaus, U.S. EPA, re: Type of Removal Action,
4/17/18. P. 100638-100640.
31. Electronic Memorandum to Mr. Martin Gehlhaus, U.S. EPA
and Mr. Eduardo Rovira, U.S. EPA, from Ms. Dawn Ioven,
U.S. EPA, re: Levels of manganese in residential
sampling, 4/17/18. P. 100641-100643.
4
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32. Electronic Memorandum to Mr. Eduardo Rovira, U.S. EPA,
from Mr. Rombel Arquines, U.S. EPA, re: Questions
about Action Memorandum, 4/20/18. P. 100644-100647.
33. Electronic Memorandum to Ms. Mary Rugala, U.S. EPA,
and Mr. Eduardo Rovira, U.S. EPA, from Mr. Rombel
Arquines, U.S. EPA, re: Transmittal of site-related
removal documents, 4/23/18. P. 100648-100674.
Pollution Reports 1-12, a January 21, 1993 Incident
Notification Report, and the December 21, 1993 Special
Bulletin A are attached.
34. Electronic Memorandum to Ms. Mary Rugala, U.S. EPA,
and Mr. Eduardo Rovira, U.S. EPA, from Mr. Rombel
Arquines, U.S. EPA, re: Transmittal of Action
Memorandums, 4/23/18. P. 100675-100685. The May 4,
1994 Action Memorandum is attached.
35. Electronic Memorandum to Ms. Mary Rugala, U.S. EPA, * *
and Mr. Eduardo Rovira, U.S. EPA, from Mr. Rombel
Arquines, U.S. EPA, re: Residential well water
sampling, 4/23/18. P. 100686-100691. Letters to two
residents are attached.
36. Electronic Memorandum to Ms. Mary Rugala, U.S. EPA, * *
and Mr. Eduardo Rovira, U.S. EPA, from Mr. Rombel
Arquines, U.S. EPA, re: Transmittal of site parcel
map, 4/24/18. P. 100692-100693. Site parcel map
attached.
37. Electronic Memorandum to Mr. Rombel Arquines, U.S.
EPA, from Mr. Eduardo Rovira, U.S. EPA, re: Site
description, 4/24/18. P. 100694-100694.
38. Electronic Memorandum to Mr. Rombel Arquines, U.S.
EPA, and Mr. Alexander Mandell, U.S. EPA, from Mr.
Eduardo Rovira, U.S. EPA, re: Bottled water delivery
to residents, 4/24/18. P. 100695-100695.
5
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39. Organic Data Validation Report for Case * *
Number 47596, Sample Delivery Group Number MC07X1,
7/2/18. P. 100696-100740. A July 9, 2018 transmittal
memorandum and May 2 018 Sample Summary Report are
attached.
40. Organic Data Validation Report for Case * *
Number 47596, Sample Delivery Group Number C0807,
7/10/18. P. 100741-100821. A July 17, 2018
transmittal memorandum and May 2018 Sample Summary
Report are attached.
41. Organic Data Validation Report for Case * *
Number 47596, Sample Delivery Group Number MC0801,
7/10/18. P. 100822-100875. A July 17, 2018
transmittal memorandum and May 2018 Sample Summary
Report are attached.
42. Organic Data Validation Report for Case * *
Number 47596, Sample Delivery Group Number MC0839,
7/11/18. P. 100876-100909. A July 17, 2018
transmittal memorandum and May 2018 Sample Summary
Report are attached.
43. Electronic Memorandum to Mr. Eduardo Rovira, * *
U.S. EPA, from Mr. Rombel Arquines, U.S. EPA, re:
Results of residential well sampling, 9/14/18.
P. 100910-100915. Four maps of sampling locations
with handwritten notes are attached.
44. Electronic Memorandum to Mr. Eduardo Rovira, * *
U.S. EPA, and Mr. Rombel Arquines, U.S. EPA, from Mr.
Martin Gehlhaus, U.S. EPA, re: Concentration of
manganese in residential water, 9/26/18. P. 100916-
100920 .
45. Electronic Memorandum to Mr. Eduardo Rovira, * *
U.S. EPA, from Mr. Rombel Arquines, U.S. EPA, re:
Water softening manganese treatment system , 10/9/18.
P. 100921-100927. A September 26, 2018 proposal, a
system specification sheet, and an October 8, 2018
email to Mr. Rombel Arquines, U. S. EPA, are attached.
6
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46. Electronic Memorandum to Mr. Eduardo Rovira, U.S. EPA,
from Mr. Rombel Arquines, U.S. EPA, re: Location of
data on share drive, 11/6/18. P. 100928-100928.
47. Electronic Memorandum to Mr. Eduardo Rovira, * *
U.S. EPA, from Mr. Rombel Arquines, U.S. EPA, re:
Transmittal of Draft Action Memorandum, 11/29/18.
P. 100929-100930.
7
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II . DECISION DOCUMENTS
1. Special Bulletin A memorandum to the Regional Response
Center, U.S. EPA, from Mr. Michael Towle, U.S. EPA,
re: Notification of $50,000 activation, 12/21/93.
P. 200001-200004.
2. Memorandum to Mr. Elliot Laws, U.S. EPA, from Mr.
Stanley Laskowski, U.S. EPA, re: Approval of
Additional Funding and Exemption from the 12-Month
Statutory Limit, 2/4/94. P. 200005-100019. A
memorandum regarding a Request for Additional Funding
and Exemption from the 12-Month Statutory Limit and a
Special Bulletin A memorandum dated December 21, 1993
regarding the $50,000 activation are attached.
3. Memorandum to Mr. Timothy Fields, U.S. EPA, from Mr.
Abraham Ferdas, U.S. EPA, re: Approval of a request
for additional funding for continued removal actions
at the site, 11/24/98. P. 200020-200029. A November
24, 1998, memorandum to Mr. Abraham Ferdas, U.S. EPA,
from Mr. Kevin Boyd, U.S. EPA, requesting additional
funding for a removal action; and a September 17,
1998, memorandum to Mr. Timothy Fields, U.S. EPA, from
Mr. Abraham Ferdas, U.S. EPA, approving a request for
an exemption to the 12-month statutory limit for a
removal action restart and the use of remaining
original funds, are attached.
4. Special Bulletin for a Removal Action, Old Wilmington
Road Groundwater Superfund Site, 4/24/18. P. 200030-
200039.
5. Memorandum to Mr. Paul Leonard, U.S. EPA, from Mr.
Eduardo Rovira, U.S. EPA, re: Request for Additional
Funds, Change of Scope, and Exemption From 12-Month
Statutory Limit for Removal Action, 1/30/19.
P. 200040-200047.
6. Modification of Administrative Record, 8/28/19.
P. 200048-200064. A January 30, 2019 Memorandum to Mr.
Paul Leonard, U.S. EPA, from Mr. Eduardo Rovira, U.S.
EPA, and an Index of Documents for the 2019 update to
the Administrative Record, are attached.
8
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APPENDIX B
RESPONSIVENESS SUMMARY
33
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This Responsiveness Summary for the Interim ROD summarizes information about the views of the public
regarding both the remedial alternatives and general concerns about the Old Wilmington Road Groundwater
Superfund Site, OU-1 Proposed Plan, submitted during the public comment period.
EPA issued a public notice in the Daily Local News on September 28,2022, which contained a list of the
components of EPA's preferred alternative, information relevant to the duration of the public comment
period, the date of the public meeting, and the availability of the Proposed Plan and the AR file. The public
comment period for the Proposed Plan was from September 28, 2022 through October 28, 2022. During the
public comment period, EPA received written and oral comments. Additionally, a public meeting was held
on October 1 1, 2022, at the Wagontown Fire Company, during which time the public could provide oral
comments and ask questions in-person.
After receiving the public's questions and comments both during the public comment period and public
meeting for the Site, EPA determined that no significant changes to the proposed interim remedial action, as
originally identified in the Proposed Plan, were necessary or appropriate.
Comments Received during Public Comment Period
EPA received comments from a total of 3 residents of the local community, i.e., one comment via email
from one resident, one comment via voicemail, and a comment letter via postal mail. Additionally,
numerous comments and questions were provided orally during the public meeting on October 1 1, 2022,
which are summarized below and also documented in a meeting transcript that can be found in the AR file
for this Site, which is available to the public online at https://semspub.epa.gov/src/collection/03/AR67242.
Below are summaries of the significant comments and questions that EPA received and EPA's responses to
them.
Comment #1
Comment: EPA received several comments in support of Alternative 3.
Response: EP A thanks the commenters for their support of the Selected Remedy.
Comment #2
Comment: One resident wrote: "Our household is outside of the plume area. Are we able to
have a water connection to our house? If yes, who is going to pay for it?" A similar question
was posed during the public meeting.
Response: As presented in the Proposed Plan, EP A has delineated the extent of the VOC and
1,4-dioxane plumes and identified an "area of concern" (AOC) which includes the area above
the plumes and sources areas as well as a buffer area around the plumes. The extent of the
buffer area will be determined during the remedial design. If a property is located within the
AOC, EPA will offer the property owner a connection to the water line and EPA will pay for
the connection. If a property is outside of the AOC, EPA will not be offering to connect the
property to the water line. If conditions change or new data demonstrate that additional
properties are impacted or potentially impacted by either current Site COCs or additional
contaminants that may be determined to be Site COCs, those properties will be included in
34
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the AOC. Also, even if a property is not located within the AOC, the resident could still
connect to the water line at their own expense.
Comment #3
Comment: A resident wrote: "At the meeting it was mentioned that PFAS chemicals was
also in the groundwater. Why was it not listed on the map showing the extent of the PF AS
plume area? Are PFAS (forever chemicals) plume spreading?" A similar question was posed
during the public meeting.
Response: The map did not show the extent of the PF AS contamination because EPA does
not yet know the extent of the PF AS contamination in the groundwater. That investigation is
still on-going as EPA continues to gather more information. Once additional information is
gathered, it will be used to delineate the extent of PFAS contamination and whether it is
spreading.
Comment #4
Comment: A resident wrote: "It has been many years since EPA tested our well water for
toxic chemicals. Is EPA going to test our water in the future?"
Response: With respect to the volatile organic compound (VOC) and 1,4-dioxane plumes,
hydrogeological studies and years of groundwater monitoring data demonstrate that they are
stable. EPA continues to conduct groundwater monitoring at the Site. EPA anticipates that
the monitoring will continue to demonstrate that the plumes are stable. However, if future
monitoring shows that the plumes are migrating, EPA will conduct additional groundwater
sampling as necessary.
With respect to PFAS, EPA will be sampling residential well water in the future as the
investigation into PFAS for OU-1 continues and as the remedial investigation for OU-2
continues.
Comment #5
Comment: A resident asked: "Is EPA considering a cancer impact study for this Superfund
site area? If not, then why not?" At the public meeting, another resident inquired whether
cancer rates for this area were higher than for other areas.
Response EPA does not conduct cancer impact studies. Cancer studies are conducted by the
appropriate health agency. In this case the appropriate health agency is the Pennsylvania
Department of Public Health (PADOH). PADOH's Pennsylvania Cancer Registry is a
statewide data system responsible for collecting information on all new cases of cancer
diagnosed or treated in Pennsylvania. The web address is:
https://www.health.pa.gov/topics/disease/Cancer/Pages/Cancer.aspx. PADOH's Registry is
part of the National Program of Cancer Registries administered by the Centers for Disease
Control and Prevention (CDC). On a county level, out of 67 counties in Pennsylvania, 51
counties have higher cancer incidence rates than Chester County, meaning that Chester
County has one of the lower rates of cancer in Pennsylvania. More information can be found
35
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at: https: //statecancerprofiles. cancer, gov/incidencerates/index. php?stateFIPS=42&areatvpe=c
ount¥&cancer=001 &race=00&sex=0&age=001 &stage=999&vear=0&tvpe=incd&sortV ariab
lcNamc ratc&sortOrder dcsc&outpiit 2
Coninient #6
Comment: One commenter stated: "We are concerned because in the future the plumes will
affect our well water. Is the plume stable in size or is it spreading?
Response: As stated in response to Comment #4 above, data demonstrate that the VOC and
1,4-dioxane plumes are stable. EPA does not have any evidence suggesting that they are
spreading.
Comment #7
Comment: One resident wrote: "Also there was no Amish members of the area present at the
meeting. Were they notified? A similar question was asked during the public meeting.
Response: Yes, the Amish community members were notified. Fact sheets were mailed out
to a large area surrounding the Site, including the Amish community.
Comment #8
Comment: One resident commented in support of Alternative 2. The resident stated the
following reasons: "Our current economic crisis has caused families who are struggling to
afford the basic necessities such as food, gas for their car, or heat for their homes to add an
additional monetary burden. If families can't afford all of these basic needs, it would cause
them to choose which one not to pay. Because of this we oppose alternative 3. The second
reason we oppose alternative 3 - "is public water really safe?" Considering they put
chemicals in this water (ie: Chlorine, Fluoride, etc. these chemicals cause harm to our bodies
even at recommended EPA levels) but we the people who are receiving this public water
don't know what other contaminates [sic] are in the water but would just have to trust the
water company that they are testing the water."
Response: EPA acknowledges that there would be a monthly water bill for each resident who
connects to the public water line as part of Alternative 3. However, while there is no
obligation to connect, it would provide a permanent public water supply (with mandated
monitoring requirements) eliminating unacceptable risks resulting from the use of
contaminated residential well water and protect against new or emerging contaminants, such
as per- and polyfluoroalkyl substances (PFAS). In addition, please see EPA's response to
Comment #10. With regards to the commenter"s second reason, state and federal regulations
require routine monitoring of public water supplies and establish safe drinking water
standards which must be met by the provider. These standards are designed to protect human
health and are enforceable. Additionally, public water suppliers are required to provide
customers with Consumer Confidence Reports on an annual basis. These reports provide
customers with information about their local water quality. Finally, although there are some
costs associated with connection to a public water line, there are also costs associated with
well water including electric, pump repair and routine maintenance.
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Comment #9
Comment; There were questions during the public meeting concerning the current status of
the Site's cleanup.
Response: As stated in the ROD, EPA continues to investigate and clean up contaminated
media, including soil and groundwater, as part of Operable Unit 2 (OU-2), at the Site. The
Selected Remedy in this Interim ROD provides a permanent public water supply via a water
line that will prevent exposure to Site-related groundwater contamination in residential
drinking water wells as well as VI while EPA addresses OU-2. Once EPA collects sufficient
data and evaluates the data, EPA will identify the clean-up alternatives for OU-2 and will
proceed through the community involvement process to present EPA's preferred alternative
for remediation of Site soils and groundwater to the public. While the investigation for OU-2
continues, EPA's priority has been to ensure that the community's drinking water is safe by
first providing POETS to affected residents through removal actions and now by selecting a
permanent public water supply via a water line under Operable Unit 1 (OU-1).
Comment #10
Comment: During the public meeting, a resident asked why the homeowner has to pay the
water bill if they are connected to the water line.
Response: EP A is authorized to remediate threats arising from the release of hazardous
substances. EPA will eliminate this threat and prevent human exposure to hazardous
substances by installing a water line. This water line will serve as a clean and safe drinking
water source to homeowners. EPA does not have authority to provide funding for the actual
supply of water to individual homeowners and these costs are typically the responsibility of
the homeowner.
Comment #11
Comment: During the public meeting, there was a question as to whether EPA has
considered air sparging as an alternative remedy?
Response: Air sparging could potentially be considered under OU-2. The Proposed Plan for
OU-1 presented alternatives to prevent exposure to Site-related groundwater contamination in
residential drinking water wells as well as VI. Air sparging is a remediation technology used
to treat contaminated groundwater, the treatment of which will be addressed as part of OU-2.
Comment #12
Comment: During the public meeting, there were questions concerning groundwater flow
and frequency of monitoring well sampling.
Response: There are several underground bedrock fractures and faults that influence
groundwater flow, which is generally eastward. Based on hydrogeological studies.
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monitoring wells have been carefully placed so as to define the extent of contamination.
EPA has sampled monitoring wells at the OVV'R Site for years now and has collected enough
data to define where the VOC and 1,4-dioxane groundwater contamination is located. Given
that the plumes of VOC and 1,4-dioxane contamination are well defined, monitoring wells
are sampled less frequently than they historically have been sampled. The extent of the VOC
and 1,4-dioxane plumes is stable, and EPA does not have any evidence to suggest that the
VOC and 1,4-dioxane plumes are expanding. EPA, however, may conduct additional
sampling for VOCs and 1,4-dioxane as part of OU-2. EPA does not expect any such sampling
to show that the plumes have expanded, however, if new data demonstrate that Site COCs
have migrated, EPA will take appropriate action. EPA will conduct additional sampling for
PF AS for OU-1.
Comment #13
Comment: During the public meeting, there were questions concerning how monitoring is
conducted for vapor intrusion.
Response: Vapor intrusion occurs when there is a migration of vapor-forming chemicals
from any subsurface source into an overlying building. The vapor-forming chemicals of
concern at this Site are VOCs. These vapors are monitored for by taking vapor samples from
the soil under the home's foundation; these are called slab, or sub-slab samples. EPA does
not generally recommend indoor air sampling before slab or sub-slab sampling, because
indoor air quality varies widely day to day. Also, household products may interfere with
sampling results. Indoor air samples are generally collected from the lowest-level space in a
building, typically a basement, during the heating season. If a building does not have a
basement, indoor air samples may be collected from the first floor. Sub-slab vapor and
outdoor air samples are usually collected at the same time as indoor air samples to help
determine where VOCs may be coming from (indoor sources, outdoor sources, and/or
beneath the building). For more information on vapor intrusion, see
https://www.epa.gov/vaporintrusion.
Comment #14
Comment: During the public meeting, a resident inquired about whether there were maps of
the vapor intrusion monitoring.
Response: EPA conducted a vapor intrusion investigation at this Site and does indeed have
maps with residential results. The individual residences that were sampled for VI were
provided with the results. Addresses of those sampled are not made available to the general
public due to privacy concerns for the individual property owners and, consequently,
residential monitoring results are not made available to the general public either. As part of
the Selected Remedy, additional vapor intrusion sampling may be conducted in the future.
Comment #15
Comment: During the public meeting, a resident inquired if a permit would be issued to
allow for a new residential well to be drilled in the area for a new house.
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Response: Chester County is responsible for issuing permits for residential wells. Chapter
500, Section 501, of the Chester County Health Department Rules and Regulations outlines
the requirements and restrictions for issuing such permits. Additionally, as part of the
Selected Remedy, ICs will be implemented to restrict potable use of untreated groundwater
within the contaminated plumes along with a prohibition on the installation of any new
groundwater wells within the lateral extent of the plumes until remediation standards and
protectiveness have been achieved, unless EPA, in consultation with PADEP, gives prior
written approval for such installation.
Comment #16
Comment: During the public meeting, a question was raised as to why we don't go after the
responsible parties.
Response: EPA does investigate potentially responsible parties and that process is still on-
going for this Site.
Comment #17
Comment: Have you informed the community about two other Superfund Sites that are
nearby?
Response: William Dick Lagoons (see www.epa.gov/superfund/williamdicklagoons) and
Blosenski Landfill (see www.epa.gov/superfund blosenski) are two separate Superfund Sites
that are also located in West Cain Township. They are separate and distinct sites from the Old
Wilmington Road Groundwater Superfund Site with their own remedies and community
outreach efforts. Outreach efforts to the surrounding communities of these sites is ongoing.
Comment #18
Comment: During the public meeting, a question was raised as to how the remedy selection
process works.
Response: EPA issues a Proposed Remedial Action Plan (proposed plan) which describes
the remedy alternatives discussed in the Feasibility Study for the site and presents EPA's
preferred alternative. The Remedial Project Manager, in this case Irene Shandruk, developed
the Proposed Plan in consultation with EPA technical support and legal teams for the Site.
The Plan was also reviewed by the Office of Land and Emergency Management at EPA
Headquarters. EPA's support agency for this Site, PADEP, is involved with all aspects of this
process and provides input on how EPA proceeds. PADEP reviewed and provided comments
on the Proposed Plan prior to final review and approval at EPA. The final review and the
approval to issue the Proposed Plan was at the regional level with the Director of the
Superfund and Emergency Management Division. Then the proposed plan is made publicly
available, along with the AR file for the site, and EPA solicits feedback from the public on
the preferred alternative. There is typically a 30-day public comment period during which
time the public can submit their comments, questions, and concerns on the proposed plan.
EPA also typically holds a public meeting where the plan is formally presented to the
community and a Q& A session is held. Taking all of the public comments into
39
-------
consideration, EPA then selects the remedy in a Record of Decision.
Comment #19
Comment: Questions were raised at the public meeting regarding EPA's definition of "a
site" and what are the Site's boundaries0
Response: The Site boundaries are defined by where Site-related hazardous substances were
deposited, stored, disposed of, or placed, or otherwise came to be located. Before EPA had
gathered enough data to characterize the nature and extent of contamination, roads and
natural landmarks were used to describe the approximate boundaries of the Site. In various
Site documents, boundary descriptions are conservative and may have been described as
being West Mattson Hollow Road to the southeast. Old Mill Road to the southwest, property
owned by the Natural Lands Trust to the west, and Airport Road to the north and northeast.
Given that the VOC and 1,4-dioxane plumes are now well defined, the boundaries for what is
considered "the Site" have been redefined to extend over the source areas and groundwater
contaminant plumes. Additionally, as investigation into emerging contaminants continues,
the Site boundaries may be redefined again in response to new data.
Comment #20
Comment: During the public meeting, a resident stated: "What I don't understand is that
you're saying it's in the groundwater. That whole area is on a hill. Groundwater water flows
downhill. How can you say the other areas on the bottom of that hill are not affected? We
flood constantly. The ground is very wet at the bottom of that hill. I mean, I live in the
swamp. So how can you say that it's not affected?" This was followed by discussion of
groundwater flow and placement of monitoring wells.
Response: Surface water flows downhill. Groundwater is underground, and its flow is
influenced by fractures and faults in the bedrock. For this Site, there is a network of complex
fractures and faults in the bedrock which cause the flow of groundwater to generally be
eastward. Flow of surface waters that may be impacting areas downgradient are not related to
the flow of groundwater beneath the surface. Placement of monitoring wells is determined by
groundwater flow because the direction of the groundwater flow is the direction in which the
contamination is flowing. The wells have been placed around the perimeter of the
groundwater contaminant plumes.
Comment #21
Comment: During the public meeting, a resident asked: "Let's say you were a homeowner
and you had a couple of acres of ground and you wanted to subdivide and build a house on it,
would the Health Department give you a permit to drill a well right now in that area?"
Response: EP A does not issue permits for wells and is unable to speak on behalf of the
Chester County Health Department (CCHD). CCHD requirements for water supply wells in
an area of concern are provided in Section 501.15 of the CCHD Rules and Regulations. In
addition, ICs are a component of the Selected Remedy, and one specific IC prohibits the
installation of any new groundwater wells until remediation standards and protectiveness
40
-------
have been achieved, unless EPA, in consultation with PADEP, gives prior written approval
for such installation.
Comment #22
Comment: During the public comment period, a resident asked: "When will all of this start?
How long will it take to finish?"
Response: EP A estimates that the construction of the water line will begin two to three years
from issuance of this Interim ROD. As stated in response to comment #18 above, the ROD is
the document in which EPA selects the remedy for a Site, after the requisite public comment
period. After the Interim ROD is issued, EPA will begin the design phase, during which the
Interim Remedy's design details are developed. Finally, EPA develops a plan for actual
construction of the selected interim remedy. During construction, EPA-installed treatment
systems will continue to be maintained and monitored. Once construction is completed, EPA
will no longer maintain or monitor those treatment systems. It is estimated that actual
construction of the water line will take two to three months, followed by an additional couple
of months of restoration work on roads and residents" properties.
Comment #23
Comment: During the public meeting, one resident inquired whether there is a "geotech
report" for the Site that will confirm the location of all the rock.
Response: EPA maintains an AR file for this Site with all the supporting
documentation for its selected remedy. The AR file contains a Remedial Investigation
report and a Supplemental Remedial Investigation report that discusses the Site's
geology and hydrogeology, which includes data concerning below surface geologic
features such as bedrock. The AR file for this Site can be accessed via the internet at
www.epa.gov/superfund/oldwilmingtonroad.
Comment #24
Comment: During the public meeting, one resident commented on the contamination
remaining in the groundwater and whether any action can be taken on it.
Response: Remediation of the groundwater is possible and such remediation will be
addressed as part of OU-2. EPA had planned to propose alternatives for remediation of
the groundwater until emerging contaminants, specifically per- and polyfluoroalkyl
substances (PFAS), were discovered. This resulted in EPA taking this interim remedial
action and initiating a new investigation to delineate the nature and extent of the PF AS
along with the remaining contaminated media at the Site
Comment #25
Comment: During the public meeting, one resident asked if these contaminants can
pass into farm animals that people consume.
41
-------
Response: No, VOCs such as tetrachloroethene (PCE) and trichloroethene (TCE) and
SVOCs such as 1,4-dioxane are highly unlikely to pass into farm animals used for
consumption at current concentrations. For more information on PCE, see
https://wwwn.cdc.gov/TSP/substances/ToxSubstance.aspx?toxid=48For more
information on TCE, see
https://wwwn.cdc. gov/TSP/substances/ToxSubstance.aspx?toxid=30. For more
information on 1,4-dioxane, see. With regards to PFAS, the risk assessment community
and the health community, in general, are still learning about its effects on livestock
and food products. For more information on PFAS, see https://www.epa.gov/pfas/pfas-
explained.
Comment #26
Comment: During the public meeting, one resident asked: "This plume is uphill from the
Coatesville Reservoir which is only 2.5 to 3 miles away. Is that a
concern?"
Response: No, this is not a concern. We have monitoring well data bounding the
extent of the plumes, and the extent of the plumes is not near the Coatesville Reservoir.
See the Supplemental Remedial Investigation for more information. It can be accessed
via the internet at www.epa.gov/superfund/oldwilmingtonroad.
Comment #27
Comment: During the public meeting, some concerns were raised with regards to the
waterline, such as length of time for construction and a boil water advisory issued in the
recent past.
Response: As stated in response to comment #22 above, EPA estimates that the water line
will be installed in two to three years after the issuance of this Interim ROD. During
construction, EPA-installed treatment systems will continue to be maintained and monitored.
With regards to the boil water advisory, each entity supplying public water is required to
follow the public notification requirements regulated by PADEP and EP A if there is any
event where drinking water could become contaminated. But if this occurs, required
precautions and safety measures are triggered, which includes boil water advisories until safe
drinking water has been restored. See
https://www.dep.pa. gov/OurCommonWealth/pages/Article. aspx?post=8
42
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APPENDIX C
ARARs and TBCs FOR SELECTED REMEDY
43
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Table C-l: Chemical-Specific ARARs
Requirement
Maximum Contaminant Levels
(MCLs) promulgated under the Safe
Drinking Water Act of 1974, as
amended, 42 U.S.C. §§ 300f et seq.
(SDWA)
Citation
40 C.F.R. §§141.61 and
141.62
Status
Relevant and
appropriate
Pennsylvania Statewide Health
Standards promulgated under the
Land Recycling and Environmental
Remediation Standards Act of May
19, 1995, P.L. 4, No. 2, 35P.S. §§
6026.101 et seq. (Act 2)
25 Pa. Code §§
250.304, and Appendix B,
Tables 1 and 2
Relevant and
Appropriate
Description
Establishes maximum
contaminant levels
(MCLs) for certain organic
and inorganic
contaminants, which are
enforceable standards for
public water supply systems
having at least 15 service
connections or being used
by at least 25 persons.
Statewide Health Standards
are Medium- Specific
Concentrations (MSCs) of
regulated substances
associated with groundwater,
used for cleanups under PA
law.
Relation to Remedy
Groundwater in the area of
concern is an underground source
of drinking water. MCLs are
relevant and appropriate as in situ
cleanup standards for
groundwater that is or may be
used for drinking water. EPA is
not selecting a remedy to clean-up
groundwater on the Site with this
action, however, PA American
Water, an off-site public water
system, is still required to meet
all applicable Safe Drinking
Water Act requirements,
including treatment of drinking
water to MCL standards. While
MCLs are not ARARs for such
off-Site treatment, they are
chemical-specific ARARs for the
purpose of determining the scope
of the AOC (i.e., which residents
will be offered connection to the
newly constructed waterline.
The MSCs for COCs in drinking
water are relevant and appropriate
standards when there are no
MCLs. While MSCs are not
ARARs for such off-Site
treatment, they are chemical-
specific ARARs for the purpose
of determining the scope of the
AOC (i.e., which residents will be
offered connection to the newly
constructed waterline.
Requirement
Regulations promulgated
under Section 106 of the
National Historical
Citation
36 C.F.R. Part 800
Table C-2: Location-Specific ARARs
Status Description
Applicable : Section 106 of the NHPA requires any
Federal undertaking to consider the
! effect the activity may have on any
44
Relation to Remedy
The water line construction meets the
definition of an "undertaking" under
36 C.F.R. § 800.16(y). Accordingly,
-------
Preservation Act of 1966, as
amended (NHPA), 54 U.S.C.
§ 306108
Regulations under the : 16 U.S.C. § 703 and Applicable
Migratory Bird Treaty Act of : 50 C.F.R. § 10.13
1918, as amended
("MBTA"), 16 U.S.C. § 703 :
Consultation requirements 50 C.F.R. §§ 402.01- Applicable
under Section 7 of the 402.17
Endangered Species Act of
1973, as amended ("ESA"),
16U.S.C. § 1536
PA regulations promulgated 17 Pa. Code § 45.12 : Applicable
under the Wild Resource ; and 45.31
Conservation Act, Act of
historic property, and the Federal
Advisory Council on Historic
Preservation must be given a
reasonable opportunity to comment on
the undertaking.
The regulations at 36 C.F.R. Part 800
describe the actions a Federal agency
must take to meet its statutory
responsibilities under the NHPA,
including consultation with the
Pennsylvania State Historic
Preservation Office (SHPO) and the
Federal Advisory Council on Historic
Preservation to determine if the
Federal undertaking will affect
cultural or historic sites on or eligible
for the National Register of Historic
Places.
Section 703 of the MBTA prohibits
the take (including killing, capturing,
selling, trading, and transport) of
protected migratory bird species that
are native to the United States without
prior authorization by the U.S. Fish
and Wildlife Service ("FWS"). The
species protected as migratory birds
under the MBTA are listed at 50
C.F.R. § 10.13.
The ESA requires consultation
between the U.S. Fish and Wildlife
Service ("FWS") and other Federal
agencies to ensure that any agency
action authorized, funded, or carried
out by these agencies is not likely to
jeopardize the continued existence of
any endangered or threatened species
or result in the destruction or adverse
modification of habitat of such
species.
Provides for general restrictions
regarding threatened or endangered
plant species.
45
EPA will comply with Section 106 of
the NHPA and the regulations
implementing it. EPA will consult
with the Federal Advisory Council
and SHPO prior to the remedial
action.
Appropriate actions will be taken
during the water line construction to
ensure that no on-Site migratory birds,
listed at 50 C.F.R. § 10.13, or their
nests are adversely affected.
There is potential presence of
threatened species in the surface
waters of this part of Chester County,
PA. Consultation will occur with FWS
to ensure the water line construction
does not jeopardize the continued
existence of any endangered or
threatened species or result in the
destruction or adverse modification of
habitat of these species.
There is potential presence of
endangered plant species in Chester
County, PA. The water line
construction will comply with the
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June 23, 1982, P.L. 597, No.
170, 32P.S. §§ 5301 etseq.
substantive requirements of these
restrictions, as necessary.
Requirement
West Cain Township
Ordinance #13
Chester County Health
Department Rules and
Regulations - Chapter 500
(Water Wells, Nuisances,
Sewage and Liquid Waste),
§501 (Water Well
Construction, Monitoring
Wells, And Individual, Semi-
Public and Public Water
Supplies and Geothermal
Boreholes).
Stormwater regulations
promulgated under the CWA,
33 U.S.C. §§ 1251 et seq.
Table C-3: Action-Specific ARARs and TBCs
Citation : Status Description
Section 8 TBC Sets forth requirements for
http://www.westcaln.org/files/1 : water supply to mobile home
31149345.pdf . ; parks.
Available at
https://www.chesco,ore/D
ocumentCenter/View/429/
501?bidld=
§§ 501.16.1; 501.16.2;
501.16.4; 501.16.5; 501.17
TBC
40 C.F.R. § 122.26(c)( 1 )(ii)
Relevant and
Appropriate
Sets forth requirements for
well permit applications,
decommissioning of wells,
and water source replacement
in Chester County, PA.
This regulation requires the
operator of a new stormwater
discharge associated with
small construction activity, as
defined by 40 C.F.R. §
122.26(b)(15), to maintain
certain information about the
nature of the site, the nature
of on-site activities, proposed
best management practices to
control pollutants in
stormwater during and after
construction activities, an
Relation to Remedy
This substantive, non-administrative
requirements for replacing the
common residential supply well at
the mobile home park located at
Donovan Drive will be considered in
connection with installation of
proposed water line.
The substantive, non-
administrative provisions of
Chapter 500, Section 501, of the
CCHD Rules and Regulations will
be considered for replacing
residential wells with a public
water line, the decommissioning of
residential wells and the retention
of residential wells upon
connection to public water for the
on-Site part of the remedial action.
No permits, licenses or similar
administrative requirements will be
obtained.
Best management practices to
control COCs in stormwater during
the construction of the water line
will be implemented. Information
required to be maintained under
this regulation will be reported to
appropriate PA and Federal officials.
No permit will be obtained3.
See 42 U.S.C. § 9621(e) and 40 C.F.R. § 300.400(e) (No Federal, state, or local permit is required for the on-site portion of a response action conducted under
Section 104 of CERCLA. The term on-site means the a real extent of contamination and all suitable areas in very close proximity to the contamination necessary for
implementation of the response action.)
46
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Standards applicable to
generators of hazardous waste
under RCRA
PA criteria for identification of
hazardous waste, promulgated
under the SWMA
PA standards applicable to
generators of hazardous
waste, promulgated under the
SWMA
40 C.F.R. §§ 262.16;
262.18(a)-(c); 262.20-
Applicable
262
262..
27;
oin/4
aiim
25 Pa. Code §§
261a. 1, 261a.2,
261.a.3 (b), 261.a.7
Applicable
25 Pa. Code §§
262a.14(a), 262a.16,
262a.18, 262a.21
265a Subchapter I4
app:
estimate of the runoff
coefficient of the site, and the
name(s) of the receiving
water(s).
These regulations
establish standards for
generators of hazardous
waste, as defined by 40
C.F.R. § 261.3.
Criteria for identification
and management of
hazardous waste. These
criteria incorporate Federal
regulations at 40 C.F.R.
Part 261, except as
expressly provided.
These standards are
substantive requirements
for persons who generate a
hazardous waste, as
defined by 25 Pa. Code §
261a.3(b).
Any generation of a hazardous
waste (POET filters) in the area of
concern, as defined by 40 C.F.R. §
261.3, during the remedial action
will comply, as appropriate, with the
substantive parts of these standards.
During the remedial action, sampling
of waste (POETS soil / waste
excavated during water line
construction, and other wastes
generated) will be conducted to
ensure proper classification and on-
site handling of solid wastes
generated.
Any generation of a hazardous
waste in the area of concern, as
defined by 25 Pa. Code § 261a.3(b),
during the remedial action will
comply with the substantive
standards related to the action.
PA regulations concerning
residual waste management,
promulgated under the PA
SWMA
PA requirements for erosion
and sediment control
promulgated under the Clean
Streams Law
25 Pa. Code §§ 287.54(a)(1)-
(2), (c), and (d); 299.111;
299.112(a)-(c); 299.114(a)
and (b); 299.115(a)-(b);
299.116; 299.121(a), (b), (d),
and (e); and 299.131(b)
25 Pa. Code §§ 102.2;
102.4(b)(l)-(5); 102.8(b)-(f)
and (n); 102.11(a) and (b);
102.22
Applicable
Applicable
These regulations set
forth the requirements
for persons who
generate, manage, or
handle residual waste
These regulations
require persons
conducting earth-
disturbance activities to
develop, implement, and
maintain best
management plans
("BMPs") to minimize the
During the remedial action, sampling
for residual waste will be conducted
to ensure proper classification and
onsite handling for possible residual
waste during the implementation of
remedial action.
An erosion and sediment-control
plan will be developed and
implemented to minimize erosion
and sedimentation to Rock Run or
other streams during the
construction of the water line. No
permit or administrative approval
will be obtained.
4 25 Pa. Code § 262a.10 incorporates by reference 40 C.F.R. Part 262, except as expressly provided in 25 Pa. Code Chapter 262a.
47
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PA Standards for
Contaminants, Chapter
123 promulgated under the Air
Pollution Control Act, Act of
Jan 8, (1960) 1959, PL. 2119,
No. 787, as amended, 35 P.S.
§§ 4001 et seq. (ACPA)
Safe Drinking Water
Regulations, Chapter 109
25 Pa. Code §123.1(c); 123.2 Applicable
Public Water Supply Manual,
Part II, Community System
Design Standards, May 6, 2006
25 PA Code Chapter 109, ; Applicable
Subchapter F. (Design and
Construction Standards), §§
109.601, 109.602 (a)(1) and
(2), 109.607, 109. 608, and
109.609(a)
Document Number: TBC
383-2125-108
Erosion and Sediment Pollution
Control Program Manual,
March 2012
Document Number: TBC
363-2134-008
PA Stormwater Best
Management Practices
Manual, December 30, 2006
Document Number:
363-0300-002
TBC
potential for accelerated
erosion and
sedimentation and to
manage post-
construction
stormwater.
Sets forth requirements
for fugitive emissions;
establishes
specific limitations for
particulate matter, odor,
and visible emissions.
Fugitive dust emissions generated
during the construction of the water
line that involves excavation will be
controlled No permit will be
obtained but all substantive
requirements of a permit will be
met.
Only those substantive portions
relevant to design and construction
of proposed water line and/or
laterals will be used, as appropriate.
Provides detailed design
and construction standards
for all community water
supplies.
Provides guidance and
procedures on ways to
minimize accelerated
erosion and resulting
sediment pollution to
surface waters.
Ensures effective
stormwater management
to minimize the adverse
impacts of stormwater on
groundwater and surface
water resources.
Only those substantive portions
relevant to design and construction
of proposed water line and/or
laterals will be considered as
performance standards to be met,
as appropriate.
The manual will be considered, as
appropriate, for minimizing erosion
and sedimentation to Rock Run or
other streams during the
construction of the water line.
The manual will be considered, as
appropriate, for best management
practices to control stormwater
during the construction of the water
line. No permit will be obtained.
48
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APPENDIX D
PERFORMANCE STANDARDS FOR RESIDENTIAL WELL WATER
49
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PERFORMANCE STANDARDS FOR RESIDENTIAL WELL WATER
OLD WILMINGTON
ROAD SIT]
E, WEST CALI
V TOWNSHIP, CI
HESTER COUNTY, PENNSYLVANIA
Chemical of
Concern
PADEP ACT
2
Groundwater
MSCs (2)
(fig/L)
SDWA
MCLs (1)
(fig/L)
EPA
RSLs'3'
Resident
Tapwater
(fig/L)
Exposure Point
Concentration
(EPC)
(fig/L)
Range of
Background
Cone.
(fig/L)
Performance
Standard
(fig/L)
Rationale for
Performance
Standard
Residential
T etrachloroethene
5
5
20.5
65.7
ND
5
Federal SDWA MCL
Trichloroethene
5
5
1.4
10.6
ND
5
Federal SDWA MCL
1.4-Dioxane
6.4
NA
4.6
3.84
ND
6.4
PADEP MSC
2-Hexanone
NA
NA
19
41
ND
19
EPA RSL
Bis(2-
ethylhexyl Iphthalatc
6
NA
56
11
ND
6
PADEP MSC
Caprolactam
NA
NA
4,950
2800
ND
4,950
EPA RSL
Aluminum
NA
NA
10,000
57,655
103- 139
10,000
EPA RSL
Arsenic
10
10
0.52
12.8
0.46 J
10
Federal SDWA MCL
Cobalt
10
NA
3
63.9
5.6-6.6
10
PADEP MSC
Iron
NA
NA
7,000
45,400
14.5 J-21.6 J
7,000
EPA RSL
Lead
5
15
7.5
23.1
0.2 J
5
PADEP MSC
Manganese
300
NA
215
2,525
243 - 308
300
PADEP MSC
Thallium
2
2
0.1
0.539
ND
2
Federal SDWA MCL
Notes:
1. Safe Drinking Water Act (SDWA) maximum contaminant levels (MCLs) regulate organic and inorganic constituents in public drinking water supplies (EPA 816-F-09-004).
May 2009.
2. PADEP ACT 2 = Pennsylvania Department of Environmental Protection Statewide Health Standards Medium-Specific Concentrations (MSCs) for Groundwater
(11/20/21): https://www.dep.pa.gov/Busmess/Land/LandRecvcling/Standards-Guidance-Procedures/Pages/Statewide-Health-Standards.aspx.
3. EPA Regional Screening Levels (RSLs) for Resident Tap water Table (TR=lE-05, HQ=0.5), May 2022. https://semspiib.epa.aov/work/HO/4Q2389.pdf
4. Exposure Point Concentration (EPC) is the concentration of contaminant to represent the level of reasonable maximum exposure anticipated for that medium.
5. EPA RSLs are non-mandatory water quality standards.
6. Abbreviations: J = estimated concentration; ND = not detected; NA = not available; (ig/L = microgram per liter
50
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APPENDIX E
CLEANUP LEVELS FOR VAPOR INTRUSION
51
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CLEANUP LEVELS FOR VAPOR INTRUSION
OLD WILMINGTON ROAD SITE, WEST CALN TOWNSHIP, CHESTER COUNTY, PENNSYLVANIA
coc
EPA
RSLs/VISLs for Resident1 (|ig / m3)
PADEP
Statewide Health Standard for
Resident2 (|ig / m3)
Residential Cleanup
Level ((ig / in3)
Indoor Air
RSL TR =
1E-5 HQ=1
Subslab Vapor
VISL TR =
1E-5 HQ=1
AF=0.03
Indoor
Air
Screening
Values
Sub-Slab Soil Gas
Screening V allies
Indoor Air
Subslab Vapor
TCE
2.1
70
2.1
80
2.1
70
PCE
42
1,390
42
1,600
42
1,390
Chloroform
1.2
41
1.1
41
1.1
41
Vinyl chloride
1.7
56
0.81
31
0.81
31
Notes:
1. EPA Regional Screening Level (RSL) Resident Ambient Air and Composite Worker Ambient Air Tables (TR=lE-5, HQ=1), November 2021,
(https://semspub.epa.gov/work/HQ/401655.pdf); VISLs derived using EPA Vapor Intrusion Screening Level Calculator (https://www.epa
.gov/vaporintrusion/vapor-intrusion-screening-level-calculator).
2. PADEP Land Recycling Program Technical Guidance Manual for Vapor Intrusion into Buildings from Groundwater and Soil under Act 2. Document
number: 261-0300-101. Vapor Intrusion Screening Value Tables, November 20,2021. PADEP= Pennsylvania Department of Environmental
Protection.
3. EPA RSLs, VISL, and PADEP soil gas and indoor air screening values are non-mandatory standards.
52
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APPENDIX F
RAGS PART D TABLES
53
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RAGS Part D Table 1
Selection of Exposure Pathways
-------
TABLE 1
SELECTION OF EXPOSURE PATHWAYS
OLD WILMINGTON ROAD SITE
PAGE 1 OF 2
Scenario
Timeframe
Medium
Exposure
Medium
Exposure
Point
Receptor
Population
Receptor
Age
Exposure
Route
Type of
Analysis
Rationale for Selection or Exclusion
of Exposure Pathway
Current
Surface Soil
Surface Soil
Old Wilmington Road
Industrial
Workers
Adult
Ingestion
Dermal
Quant
Quant
Industrial workers may have contact with surface soil while at the site.
Residents
Child
Ingestion
Dermal
Quant
Quant
Current residents may be exposed to surface soil during outdoor activities.
Adult
Ingestion
Dermal
Quant
Quant
Air
Old Wilmington Road
Industrial
Workers
Adult
Inhalation
Quant
Industrial workers may be exposed to fugitive dust and volatile emissions from surface soil
during work activities.
Residents
Child
Inhalation
Quant
Current residents may be exposed to fugitive dust and volatile emissions from surface soil
during outdoor activities.
Adult
Inhalation
Quant
Groundwater
Groundwater
Old Wilmington Road
Industrial
Workers
Adult
Ingestion
Dermal
None
None
Current industrial workers are not exposed to groundwater.
Residents
Child
Ingestion
Dermal
None
None
Currently there is no complete pathway. Residents with impacted wells have treatment
systems.
Adult
Ingestion
Dermal
None
None
Air
Old Wilmington Road
Industrial
Workers
Adult
Inhalation
None
Current industrial workers are not exposed to groundwater.
Residents
Child
Inhalation
None
Currently there is no complete pathway. Residents with impacted wells have treatment
systems.
Adult
Inhalation
None
Vapor Intrusion
Industrial
Workers
Adult
Inhalation
Quant
Industrial workers may be exposed to COPCs that have migrated from groundwater through
building foundations and into indoor air.
Residents
Child
Inhalation
Quant
Residents may be exposed to COPCs that have migrated from groundwater through building
foundations and into indoor air.
Adult
Inhalation
Quant
Surface Water
Surface Water
Old Wilmington Road
Residents
Child
Ingestion
Dermal
None
None
No COPCs were identified for surface water.
Adult
Ingestion
Dermal
Quant
Quant
Sediment
Sediment
Old Wilmington Road
Residents
Child
Ingestion
Dermal
Quant
Quant
Residents may be exposed to sediment impacted by COPCs from the site.
Adult
Ingestion
Dermal
Quant
Quant
Future
Surface/
Subsurface Soil
Surface/
Subsurface Soil
Old Wilmington Road
Construction
Workers
Adult
Ingestion
Dermal
Quant
Quant
Construction workers may be exposed to surface soil and subsurface soil during excavation
activities.
Industrial
Workers
Adult
Ingestion
Dermal
Quant
Quant
Industrial workers may have contact with surface soil.
Residents
Child
Ingestion
Dermal
Quant
Quant
Future residents may be exposed to subsurface soil that was mixed with surface soil during
construction activities.
Adult
Ingestion
Dermal
Quant
Quant
-------
TABLE 1
SELECTION OF EXPOSURE PATHWAYS
OLD WILMINGTON ROAD SITE
PAGE 2 OF 2
Scenario
Timeframe
Medium
Exposure
Medium
Exposure
Point
Receptor
Population
Receptor
Age
Exposure
Route
Type of
Analyses
Rationale for Selection or Exclusion
of Exposure Pathway
Future
Surface/
Subsurface Soil
Air
Old Wilmington Road
Construction
Workers
Adult
Inhalation
Quant
Construction workers may be exposed to fugitive dust and volatile emissions from surface and
subsurface soil.
Industrial
Workers
Adult
Inhalation
Quant
Industrial workers may be exposed to fugitive dust and volatile emissions from surface soil
during work activities.
Residents
Child
Inhalation
Quant
Future residents may be exposed to fugitive dust and volatile emissions from surface and
subsurface soil that was mixed during construction activities.
Adult
Inhalation
Quant
Groundwater
Groundwater
Old Wilmington Road
Construction
Workers
Adult
Ingestion
Dermal
Quant
Quant
Construction workers may have contact with groundwater during excavation activities.
Industrial
Workers
Adult
Ingestion
Dermal
Quant
Quant
Industrial workers may have contact with groundwater if groundwater is used as a drinking
water supply.
Residents
Child
Ingestion
Dermal
Quant
Quant
Residents may have contact with groundwater if groundwater is used as a drinking water
supply.
Adult
Ingestion
Dermal
Quant
Quant
Air
Old Wilmington Road
Construction
Workers
Adult
Inhalation
Quant
Construction workers may be exposed to COPCs that have volatilized from groundwater during
excavation activities.
Industrial
Workers
Adult
Inhalation
Quant
Industrial workers may be expected to be exposed to COPCs that have volatilized from
groundwater while showering.
Residents
Child
Inhalation
None
Child residents are not expected to be exposed to COPCs that have volatilized from
groundwater.
Adult
Inhalation
Quant
Adult residents may be expected to be exposed to COPCs that have volatilized from
groundwater while showering.
Vapor Intrusion
Industrial
Workers
Adult
Inhalation
Quant
Industrial workers may be exposed to COPCs that have migrated from groundwater through
building foundations and into indoor air.
Residents
Child
Inhalation
Quant
Residents may be exposed to COPCs that have migrated from groundwater through building
foundations and into indoor air.
Adult
Inhalation
Quant
Surface Water
Surface Water
Old Wilmington Road
Residents
Child
Ingestion
Dermal
Quant
Quant
No COPCs were identified for surface water.
Adult
Ingestion
Dermal
Quant
Quant
Sediment
Sediment
Old Wilmington Road
Residents
Child
Ingestion
Dermal
Quant
Quant
Residents may be exposed to sediment impacted by COPCs from the site.
Adult
Ingestion
Dermal
Quant
Quant
Definitions:
COPC = Chemical of potential concern.
Quant = Quantitative.
-------
RAGS Part D Table 2
Occurrence, Distribution and Selection
Of Chemicals of Potential Concern
-------
LIST OF TABLES
RAGS PART D TABLE 2
OCCURRENCE, DISTRIBUTION AND SELECTION OF CHEMICALS OF POTENTIAL CONCERN
Table No.
2.1
Surface Soil - Direct Contact
2.2
Surface Soil - Migration from Soil to Groundwater
2.3
Surface/Subsurface Soil - Direct Contact
2.4
Surface/Subsurface Soil - Migration from Soil to Groundwater
2.5
Gorundwater - Direct Contact
2.6
Groundwater - Vapor Intrusion
2.7
Surface Water
2.8
Sediment
-------
Scenario Timeframe: Current/Future
Medium: Surface Soil
Exposure Medium: Surface Soii
TABLE 2.1
OCCURRENCE, DISTRIBUTION, AND SELECTION OF CHEMICALS OF POTENTIAL CONCERN - DIRECT CONTACT WITH SURFACE SOIL
OLD WILMINGTON ROAD SITE
PAGE 1 OF 2
CAS
Number
Chemical
Minimum
Concentration'1'
Maximum
Concentration'1'
Units
Sample of Maximum
Concentration
Freguency
of
Detection
Range of
Detection
Limits'2'
Concentration
Used for
Screening'3'
Range of
Background
Concentrations'4'
USEPA RSL
Residential Soilp'
Potential
ARAR/TBC
Potential
ARAR/TBC
Source
COPC
Flag
Rationale for
Contaminant
Deletion or
Selection'5'
Volatile Organic Compounds |
78-93-3
2-Butanone
26
43
ug/kg
OWR-SS-AR19-00.5-601
2/73
o
o
43
ND
2,700,000 N
NA
NA
No
BSL
67-64-1
Acetone
2
930
ug/kg
OWR-SS-AR19-00.5-601
12/73
4- 10
930
10
6,100,000 N
NA
NA
No
BSL
79-20-9
Methyl Acetate
6
7
ug/kg
OWR-SS-AR 10-00.5-601
2/73
o
o
7
ND
7,800,000 N
NA
NA
No
BSL
75-09-2
Methylene Chloride
9
39
ug/kg
OWR-SS-AR16-00.5-601,
OWR-SS-BP01-00.5-601
73/73
39
10-30
35,000 N
NA
NA
No
BSL
127-18-4
Tetrachloroethene
2
2
ug/kg
OWR-SS-JK08-00.5-601,
OWR-SS-JK98-00.5-601
1/73
o
o
2
ND
8,100 N
NA
NA
No
BSL
Semi volatile Organic Compounds |
91-57-6
2-Methylnaphthalene
9,200
9,200
ug/kg
OWR-SS-LF08-00.5-601
1/19
330- 330
9,200
ND
24,000 N
NA
NA
No
BSL
83-32-9
Acenaphthene
520
520
ug/kg
OWR-SS-LF08-00.5-601
1/19
330- 330
520
ND
360,000 N
NA
NA
No
BSL
120-12-7
Anthracene
400
400
ug/kg
OWR-SS-LF08-00.5-601
1/19
330- 330
400
ND
1,800,000 N
NA
NA
No
BSL
100-52-7
Benzaldehyde
71
71
ug/kg
OWR-SS-TY06-00.5-601
1/19
330- 330
71
ND
170,000 C
NA
NA
No
BSL
56-55-3
Benzo(a)anthracene
57
930
ug/kg
OWR-SS-LF08-00.5-601
5/19
330- 330
930
ND
1,100 C
NA
NA
No
BSL
50-32-8
Benzo(a)pyrene
68
820
ug/kg
OWR-SS-LF08-00.5-601
5/19
330- 330
820
ND
110 c
NA
NA
Yes
ASL
205-99-2
Benzo(b)fluoranthene
90
820
ug/kg
OWR-SS-LF08-00.5-601
5/19
330- 330
820
47
1,100 c
NA
NA
No
BSL
191-24-2
Benzo(g,h,i)perylene
47
110
ug/kg
OWR-SS-JK98-00.5-601
2/19
330- 330
110
ND
180,000 N(7)
NA
NA
No
BSL
207-08-9
Benzo(k)fluoranthene
69
600
ug/kg
OWR-SS-LF08-00.5-601
5/19
330- 330
600
ND
11,000 c
NA
NA
No
BSL
85-68-7
Benzyl Butyl Phthalate
57
340
ug/kg
OWR-SS-TP04-00.5-601
3/19
330- 330
340
200
290,000 C
NA
NA
No
BSL
92-52-4
Biphenyl (Diphenyl)
1,200
1,200
ug/kg
OWR-SS-LF08-00.5-601
1/19
330- 330
1,200
ND
4,700 N
NA
NA
No
BSL
117-81-7
Bis(2-Ethylhexyl) Phthalate
45
1,100
ug/kg
OWR-SS-LF08-00.5-601
17/19
330- 330
1,100
75 - 690
39,000 C
NA
NA
No
BSL
218-01-9
Chrysene
100
1,200
ug/kg
OWR-SS-LF08-00.5-601
5/19
330- 330
1,200
52 - 320
110,000 C
NA
NA
No
BSL
132-64-9
Dibenzofuran
510
510
ug/kg
OWR-SS-LF08-00.5-601
1/19
330- 330
510
ND
7,300 N
NA
NA
No
BSL
84-74-2
di-n-Butyl Phthalate
43
590
ug/kg
OWR-SS-TP02-00.5-601
3/19
330- 330
590
56
630,000 N
NA
NA
No
BSL
206-44-0
Fluoranthene
41
1,700
ug/kg
OWR-SS-LF08-00.5-601
9/19
330- 330
1,700
54 - 500
240,000 N
NA
NA
No
BSL
86-73-7
Fluorene
740
740
ug/kg
OWR-SS-LF08-00.5-601
1/19
330- 330
740
ND
240,000 N
NA
NA
No
BSL
193-39-5
lndeno(1,2,3-cd)pyrene
41
150
ug/kg
OWR-SS-JK98-00.5-601
3/19
330- 330
150
ND
1,100 C
NA
NA
No
BSL
91-20-3
Naphthalene
9,800
9,800
ug/kg
OWR-SS-LF08-00.5-601
1/19
330- 330
9,800
ND
3,800 C
NA
NA
Yes
ASL
86-30-6
N-Nitrosodiphenylamine
780
780
ug/kg
OWR-SS-LF08-00.5-601
1/19
330- 330
780
ND
110,000 c
NA
NA
No
BSL
85-01-8
Phenanthrene
37
2,900
ug/kg
OWR-SS-LF08-00.5-601
5/19
330- 330
2,900
290
180,000 N(7)
NA
NA
No
BSL
129-00-0
Pyrene
48
1,900
ug/kg
OWR-SS-LF08-00.5-601
8/19
330- 330
1,900
55 - 440
180,000 N
NA
NA
No
BSL
Pesticides/PCBs |
5103-71-9
alpha-Chlordane
18
140
ug/kg
OWR-SS-BP91-00.5-601
2/19
1.7-1.7
140
ND
1,700 C(8)
NA
NA
I No |
BSL
60-57-1
Dieldrin
4.8
110
ug/kg
OWR-SS-LF08-00.5-601
2/19
3.3-3.3
110
11
34 C
NA
NA
na
ASL
1031-07-8
Endosulfan Sulfate
5.7
5.7
ug/kg
OWR-SS-TP02-00.5-601
1/19
3.3-3.3
5.7
ND
47,000 N(9)
NA
NA
No
BSL
72-20-8
Endrin
6.5
6.5
ug/kg
OWR-SS-LF08-00.5-601
1/19
3.3-3.3
6.5
ND
1,900 N
NA
NA
No
BSL
7421-93-4
Endrin Aldehyde
82
82
ug/kg
OWR-SS-LF08-00.5-601
1/19
3.3-3.3
82
ND
1,900 N(10)
NA
NA
No
BSL
53494-70-5
Endrin Ketone
18
18
ug/kg
OWR-SS-LF08-00.5-601
1/19
3.3-3.3
18
ND
1,900 N(10)
NA
NA
No
BSL
5103-74-2
gamma-Chlordane
3.5
100
ug/kg
OWR-SS-BP91-00.5-601
3/19
1.7-1.7
100
2.4-2.6
1,700 C(8)
NA
NA
No
BSL
76-44-8
Heptachlor
2.1
2.1
ug/kg
OWR-SS-BP91-00.5-601
1/19
1.7-1.7
2.1
ND
130 C
NA
NA
No
BSL
1024-57-3
Heptachlor Epoxide
2.1
18
ug/kg
OWR-SS-BP91-00.5-601
3/19
1.7-1.7
18
3
70 C
NA
NA
No
BSL
72-54-8
p,p-DDD
13
13
ug/kg
OWR-SS-LF08-00.5-601
1/19
3.3-3.3
13
ND
190 N
NA
NA
No
BSL
72-55-9
p.p-DDE
29
29
ug/kg
OWR-SS-LF08-00.5-601
1/19
3.3-3.3
29
ND
2,000 C
NA
NA
No
BSL
50-29-3
p,p-DDT
11
26
ug/kg
OWR-SS-LF08-00.5-601
3/19
3.3-3.3
26
11 - 18
1,900 C
NA
NA
No
BSL
11097-69-1
PCB-1254
44
46
ug/kg
OWR-SS-LF01-00.5-601,
OWR-SS-TP02-00.5-601
3/19
33-33
46
51 - 250
120 N
NA
NA
No
BSL
Inorganics
7429-90-5
Aluminum
3,030
16,100
mg/kg
OWR-SS-LF08-00.5-601
20/20
16,100
4,940 - 14,200
7,700 N
NA
NA
ASL
7440-36-0
Antimony
0.74 JL
37.1 L
mg/kg
OWR-SS-TP02-00.5-601
10/20
3.5- 12
37.1
1.1 JL- 1.9 JL
3.1 N
NA
NA
ASL
7440-38-2
Arsenic
1.8 J
8.1
mg/kg
OWR-SS-BP91-00.5-601
20/20
8.1
3.6 - 7.9
0.68 C
NA
NA
ASL
7440-39-3
Barium
40.1 J
145
mg/kg
OWR-SS-LF08-00.5-601
20/20
145
61.9 - 118
1,500 N
NA
NA
No
BSL
7440-41-7
Beryllium
0.16 J
0.84
mg/kg
OWR-SS-HF01-00.5-601
20/20
0.84
0.15 J - 0.95 J
16 N
NA
NA
No
BSL
7440-43-9
Cadmium
0.13 J
3.5
mg/kg
OWR-SS-LF08-00.5-601
6/20
1 - 1
3.5
0.81 J - 2.1
7.1 N
NA
NA
No
BSL
7440-70-2
Calcium
289 J
83,300
mg/kg
OWR-SS-TP01-00.5-601
20/20
83,300
256 J - 17,500
NA
NA
NA
No
NUT
7440-47-3
Chromium
7.3
79.5
mg/kg
OWR-SS-BP91-00.5-601
21/21
79.5
11.6 - 164
12,000 N(11)
NA
NA
No
BSL
7440-48-4
C
14.1
mg/kg
OWR-SS-JK02-00.5-601
20/20
14.1
3.3 - 7.8 J
2.3 N
NA
NA
ASL
7440-50-8
C
llff 1 5.4
4,530 J
mg/kg
OWR-SS-AR07-00.5-601
20/20
4,530
5.7 - 267 J
310 N
NA
NA
ASL
7439-89-6
Ir
9 I 4,120
49,400
mg/kg
OWR-SS-LF08-00.5-601
20/20
49,400
9,340 - 173,000
5,500 N
NA
NA
ASL
7439-92-1
L
kwlliiMiiM 12.5 L
1,650 L
mg/kg
OWR-SS-TP02-00.5-601
20/20
1,650
26.1 - 969 L
200 (12i
NA
NA
ASL
7439-95-4
iMagnesium 1
430 J
51,300
mg/kg
OWR-SS-TP01-00.5-601
20/20
51,300
736 - 6,840
NA
NA
NA
HnoH
NUT
7439-96-5
Manganese
37.2
632
mg/kg
OWR-SS-TY06-00.5-601
20/20
632
204 - 1570
180 N
NA
NA
Yes
ASL
7439-97-6
I Mercury
0.06 J
0.42
mg/kg
OWR-SS-LF08-00.5-601
6/20
o
o
0.42
0.07 J - 0.21
!1.1 NI
NA
NA
i No
BSL
Exposure
Point
-------
Scenario Timeframe: Current/Future
Medium: Surface Soil
Exposure Medium: Surface Soii
TABLE 2.1
OCCURRENCE, DISTRIBUTION, AND SELECTION OF CHEMICALS OF POTENTIAL CONCERN - DIRECT CONTACT WITH SURFACE SOIL
OLD WILMINGTON ROAD SITE
PAGE 2 OF 2
Exposure
Point
CAS
Number
Chemical
Minimum
Concentration'1'
Maximum
Concentration'1'
Units
Sample of Maximum
Concentration
Frequency
of
Detection
Range of
Detection
Limits'2'
Concentration
Used for
Screening'3'
Range of
Background
Concentrations'4'
USEPA RSL
Residential SoilP)
Potential
ARAR/TBC
Potential
ARAR/TBC
Source
COPC
Flag
Rationale for
Contaminant
Deletion or
Selection'5'
OWR
jlnorganics (Continued) |
7440-02-0
Nickel
4.7 J
35
mq/kq
OWR-SS-LF08-00.5-601
20/20
35
4.7 - 70.6
150 N
NA
NA
No
BSL
7440-09-7
Potassium
484 J
1,180 J
mq/kq
OWR-SS-LF07-00.5-601
20/20
1,180
504 J - 1,050 J
NA
NA
NA
No
NUT
7782-49-2
Selenium
0.79 JK
2.5
mg/kg
OWR-SS-LF08-00.5-601
7/20
1 - 1
2.5
1.1 J - 3.4
39 N
NA
NA
No
BSL
7440-22-4
Silver
0.21 J
2.3 J
mq/kq
OWR-SS-LF08-00.5-601
18/20
2-2
2.3
0.26 J - 3
39 N
NA
NA
No
BSL
7440-23-5
Sodium
112
296 J
mg/kg
OWR-SS-AR07-00.5-601
20/20
296
108 J - 236 J
NA
NA
NA
No
NUT
7440-62-2
Vanadium
6.5 J
44.6
mg/kg
OWR-SS-JK02-00.5-601
20/20
44.6
16.9 - 63.4
39 N
NA
NA
ASL
7440-66-6
Zinc
21.4
2,450
mg/kg
OWR-SS-LF08-00.5-601
20/20
2,450
22.5 - 984
2,300 N
NA
NA
ASL
57-12-5
iCyanide
0.07
1.6
mg/kg
OWR-SS-LF08-00.5-601
12/20
o
o
1.6
0.06 JL-0.66 JL
I 2.3 N I
NA
NA
i No I
BSL
Footnotes:
1 - Sample and duplicate are considered as two separate samples when determining the minimum and maximum concentrations.
2 - Values presented are sample-specific quantitation limits.
3 - The maximum detected concentration is used for screening purposes.
4 - Background data is presented for information purposes only and was not used in the selection of COPCs.
5 - USEPA Regional Screening Levels (RSLs) for Chemical Contaminants at Superfund Sites, May 2018. The noncarcinogenic values (denoted with a "N" flag)
correspond to a target hazard quotient of 0.1. Carcinogenic values represent an incremental cancer risk of 1E-06 (carcinogens denoted with a "C" flag).
6 - The chemical is selected as a COPC if the maximum detected concentration exceeds the risk-based COPC screening level.
7 - Value is for pyrene.
8 - Value is for chlordane.
9 - Value is for endosulfan.
10 - Value is for endrin.
11 - Hexavalent chromium was not detected in any soil sample, therefore total chromium was evaluated as trivalent chromium.
12 - USEPA, 2016.Updated Scientific Considerations for Lead in Soil Cleanups, December.
Shaded criterion indicates that the maximum detected concentration exceeds one or more screening criteria. Shaded chemical name indicates that the
chemical was retained as a COPC.
Definitions:
ARAR/TBC = Applicable or Relevant and Appropriate Requirements To Be Considered
C = Carcinogen
COPC = Chemical Of Potential Concern
J = Estimated value
K = Analyte present. Reported value may be biased high. Actual values is expected to be lower.
L = Analyte present. Reported value may be biased low.
mg/kg = milligrams per kilogram
N = Noncarcinogen
NA = Not Applicable/Not Available
ug/kg = micrograms per kilogram
Rationale Codes:
For selection as a COPC:
ASL = Above Screening Level.
For elimination as a COPC:
BSL = Below COPC Screening Level
NUT = Essential nutrient
-------
Scenario Timeframe: Current/Future
Medium: Surface Soil
Exposure Medium: Surface Soii
TABLE 2.2
OCCURRENCE, DISTRIBUTION, AND SELECTION OF CHEMICALS OF POTENTIAL CONCERN - MIGRATION FROM SUBSURFACE SOIL TO GROUNDWATER
OLD WILMINGTON ROAD SITE
PAGE 1 OF 2
Exposure
Point
CAS
Number
Minimum
Concentration'1
Maximum
Concentration'1
Sample of Maximum
Concentration
Frequency
of
Detection
Range of
Detection
Limits'2'
Concentration
Used for
Screening'3'
Range of
Background
Concentrations'4,
USEPA RSL
Migration from Soil
to Groundwater'5'
Potential
ARAR/TBC
Potential
ARAR/TBC
Source
COPC
Flag
Rationale for
Contaminant
Deletion or
Selection*5'
78-93-3 |2-Butanone j 26
43
ug/kg
OWR-SS-AR19-00.5-601
2/73
0
0
43
ND
ssbbbbbbbbJ^b^bb
410 N
NA
NA
No
No
BSL
67-64-1
Acetone
2
930
ug/kg
OWR-SS-AR19-00.5-601
12/73
4- 10
930
10
NA
NA
ASL
79-20-9 i Methyl Acetate | 6
7
ug/kg
OWR-SS-AR 10-00.5-601
2/73
0
0
7
ND
NA
NA
BSL
75-09-2 I
9
39
ug/kg
OWR-SS-AR16-00.5-601,
OWR-SS-BP01-00.5-601
73/73
39
10-30
2.7 N
NA
NA
ASL
127-18-' | j
2
2
ug/kg
OWR-SS-JK08-00.5-601,
OWR-SS-JK98-00.5-601
1/73
0
0
2
ND
1.8 N
NA
NA
ASL
Semi volatile Organic Compounds
91-57-6
2-Methylnaphthalene
9,200
9,200
ug/kg
OWR-SS-LF08-00.5-601
1/19
330- 330
9,200
ND
550 N
NA
NA
m&m
No
ASL
83-32-9
Acenaphthene
520
520
ug/kg
OWR-SS-LF08-00.5-601
1/19
330- 330
520
ND
NA
NA
BSL
120-12-7
Anthracene
400
400
ug/kg
OWR-SS-LF08-00.5-601
1/19
330- 330
400
ND
5,800 N
NA
NA
No
BSL
100-52-j 71
71
uq/kq
OWR-SS-TY06-00.5-601
1/19
330- 330
71
ND
4.1 C
NA
NA
ASL
56-55-3 57
930
ug/kg
OWR-SS-LF08-00.5-601
5/19
330- 330
930
ND
11 C
NA
NA
ASL
50-32-8 68
820
ug/kg
OWR-SS-LF08-00.5-601
5/19
330- 330
820
ND
29 C
NA
NA
ASL
205-99-2
SHH 90
820
ug/kg
OWR-SS-LF08-00.5-601
5/19
330- 330
820
47
300 C
NA
NA
ASL
191-24-2
Benzo(g,h,i)perylene
47
110
ug/kg
OWR-SS-JK98-00.5-601
2/19
330- 330
110
ND
1,300 N(7)
NA
NA
No
BSL
207-08-9
Benzo(k)fluoranthene
69
600
ug/kg
OWR-SS-LF08-00.5-601
5/19
330- 330
600
ND
2,900 C
NA
NA
No
BSL
85-68-7
Benzyl Butyl Phthalate
57
340
ug/kg
OWR-SS-TP04-00.5-601
3/19
330- 330
340
200
240 C
NA
NA
ASL
92-52-4
Biphenyl (Diphenyl)
1,200
1,200
ug/kg
OWR-SS-LF08-00.5-601
1/19
330- 330
1,200
ND
0.87 N
NA
NA
ASL
117-81-7
Bis(2-Ethylhexyl) Phthalate
45
1,100
ug/kg
OWR-SS-LF08-00.5-601
17/19
330- 330
1,100
75 - 690
1,300 C
NA
NA
No
BSL
218-01-9
Chrysene
100
1,200
ug/kg
OWR-SS-LF08-00.5-601
5/19
330- 330
1,200
52 - 320
9,000 C
NA
NA
No
BSL
132-64-9
Dibenzofuran
510
510
ug/kg
OWR-SS-LF08-00.5-601
1/19
330- 330
510
ND
15 N
NA
NA
i
ASL
84-74-2
di-n-Butyl Phthalate
43
590
ug/kg
OWR-SS-TP02-00.5-601
3/19
330- 330
590
56
230 N
NA
NA
ASL
206-44-0 iFluoranthene j 41
1,700
ug/kg
OWR-SS-LF08-00.5-601
9/19
330- 330
1,700
54 - 500
^8^00N
! 980 C
NA
NA
BSL
I 86-73-7 |
Fluorene
I 740 |
740
ug/kg
OWR-SS-LF08-00.5-601
1/19
330- 330
740
ND
NA
NA
ASL
I 193-39-5 !lndeno(1,2,3-cd)pyrene j 41 I
150
ug/kg
OWR-SS-JK98-00.5-601
3/19
330- 330
150
ND
NA
NA
BSL
91-20-3
Naphthalene
9,800
9,800
ug/kg
OWR-SS-LF08-00.5-601
1/19
330- 330
9,800
ND
NA
NA
ASL
86-30-6
N-Nitrosodiphenylamine
780
780
ug/kg
OWR-SS-LF08-00.5-601
1/19
330- 330
780
ND
NA
NA
ASL
85-01-8
Phenanthrene
37
2,900
ug/kg
OWR-SS-LF08-00.5-601
5/19
330- 330
2,900
290
NA
NA
ASL
129-00-0
Pyrene
48
1,900
uq/kq
OWR-SS-LF08-00.5-601
8/19
330- 330
1,900
55 - 440
NA
NA
ASL
(Pesticides/PCBs
5103-71-9
alpha-Chlordane
18
140
ug/kg
OWR-SS-BP91-00.5-601
2/19
1.7-1.7
140
ND
2.7 C
NA
NA
ASL
60-57-1
Dieldrin
4.8
110
ug/kg
OWR-SS-LF08-00.5-601
2/19
3.3-3.3
110
11
0.071 C
NA
NA
ASL
1031-07-8
Endosulfan Sulfate
5.7
5.7
ug/kg
OWR-SS-TP02-00.5-601
1/19
3.3-3.3
5.7
| ND \ 140 N(9)
NA
NA
No
BSL
72-20-8
Endrin
6.5
6.5
ug/kg
OWR-SS-LF08-00.5-601
1/19
3.3-3.3
6.5
ND
! 9.2 N
mmmm
NA
NA
No
BSL
7421-93-4
Endrin Aldehyde
82
82
ug/kg
OWR-SS-LF08-00.5-601
1/19
3.3-3.3
82
ND
10)
NA
NA
ASL
53494-70-5
Endrin Ketone
18
18
ug/kg
OWR-SS-LF08-00.5-601
1/19
3.3-3.3
18
ND
9.2 N(10i
2.7 c'8i
0.12 C
0.028 C
1.5 N
11 C
2 C
NA
NA
ASL
5103-74-2
gamma-Chlordane
3.5
100
ug/kg
OWR-SS-BP91-00.5-601
3/19
1.7- 1.7
100
2.4-2.6
NA
NA
Yes
ASL
76-44-8
Heptachlor
2.1
2.1
ug/kg
OWR-SS-BP91-00.5-601
1/19
1.7-1.7
2.1
ND
NA
NA
Yes
ASL
1024-57-3
Heptachlor Epoxide
2.1
18
ug/kg
OWR-SS-BP91-00.5-601
3/19
1.7-1.7
18
3
NA
NA
ASL
72-54-8
p,p-DDD
13
13
ug/kg
OWR-SS-LF08-00.5-601
1/19
3.3-3.3
13
ND
NA
NA
No
ASL
72-55-9
p,p-DDE
29
29
ug/kg
OWR-SS-LF08-00.5-601
1/19
3.3-3.3
29
ND
NA
NA
ASL
i 50-29-3 ip,p-DDT j 11 |
26
ug/kg
OWR-SS-LF08-00.5-601
3/19
3.3-3.3
26
11 - 18
NA
NA
BSL
11097-69-1
PCB-1254
44
46
ug/kg
OWR-SS-LF01-00.5-601,
OWR-SS-TP02-00.5-601
3/19
33-33
46
51 - 250
NA
NA
ASL
Inorganics
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
OWR-SS-LF08-00.5-601
QWR-SS-TP02-00.5-601
OWR-SS-BP91-00.5-601
OWR-SS-LF08-00.5-601
OWR-SS-HF01-00.5-601
QWR-SS-LF08-00.5-601
OWR-SS-TP01-00.5-601
4,940 - 14,200
1.1 JL- 1.9 JL
0.15 J - 0.95 J
256 J - 17,500
7440-47-3 Chromium
mg/kg
OWR-SS-BP91-00.5-601
mg/kg
OWR-SS-JK02-00.5-601
mg/kg
OWR-SS-AR07-00.5-601
mg/kg
OWR-SS-LF08-00.5-601
9,340 - 173,000
mg/kg
mg/kg
mg/kg
QWR-SS-TP02-00.5-601
OWR-SS-TPQ1-00.5-601
QWR-SS-TY06-00.5-601
OWR-SS-LF08-00.5-601
-------
Scenario Timeframe: Current/Future
Medium: Surface Soil
Exposure Medium: Surface Soii
TABLE 2.2
OCCURRENCE, DISTRIBUTION, AND SELECTION OF CHEMICALS OF POTENTIAL CONCERN - MIGRATION FROM SUBSURFACE SOIL TO GROUNDWATER
OLD WILMINGTON ROAD SITE
PAGE 2 OF 2
Exposure
Point
CAS
Number
Chemical
Minimum
Concentration'1'
Maximum
Concentration'1'
Units
Sample of Maximum
Concentration
Frequency
of
Detection
Range of
Detection
Limits'2'
Concentration
Used for
Screening'3'
Range of
Background
Concentrations'4'
USEPA RSL
Migration from Soil
to Groundwater'5'
Potential
ARAR/TBC
Potential
ARAR/TBC
Source
COPC
Flag
Rationale for
Contaminant
Deletion or
Selection'5'
OWR
jlnorganics (Continued)
7440-02-0
Nickel
4.7 J
35
mq/kq
OWR-SS-LF08-00.5-601
20/20
35
4.7 - 70.6
2.6 N
NA
NA
Yes
ASL
7440-09-7
Potassium
484 J
1,180 J
mq/kq
OWR-SS-LF07-00.5-601
20/20
1,180
504 J - 1,050 J
! NA
NA
NA
I No
NUT
7782-49-2
Selenium
0.79 JK
2.5
mg/kg
OWR-SS-LF08-00.5-601
7/20
1 - 1
2.5
1.1 J - 3.4
0.052 N
NA
NA
Yes
ASL
7440-22-4
Silver
0.21 J
2.3 J
mq/kq
OWR-SS-LF08-00.5-601
18/20
2-2
2.3
0.26 J - 3
0.08 N
NA
NA
Yes
ASL
I 7440-23-5 jSodium
112
296 J
mg/kg
OWR-SS-AR07-00.5-601
20/20
296
108 J - 236 J
! NA
NA
NA
i No
NUT
7440-62-2
Vanadium
6.5 J
44.6
mg/kg
OWR-SS-JK02-00.5-601
20/20
44.6
16.9 - 63.4
8.6 N
NA
NA
Yes
ASL
7440-66-6
Zinc
21.4
2,450
mg/kg
OWR-SS-LF08-00.5-601
20/20
2,450
22.5 - 984
37 N
NA
NA
Yes
ASL
57-12-5
Cyanide
0.07
1.6
mg/kg
OWR-SS-LF08-00.5-601
12/20
o
o
1.6
0.06 JL-0.66 JL
0.0015 N
NA
NA
Yes
ASL
Footnotes:
1 - Sample and duplicate are considered as two separate samples when determining the minimum and maximum concentrations.
2 - Values presented are sample-specific quantitation limits.
3 - The maximum detected concentration is used for screening purposes.
4 - Background data is presented for information purposes only and was not used in the selection of COPCs.
5 - USEPA Regional Screening Levels (RSLs) for Chemical Contaminants at Superfund Sites, May 2018. The noncarcinogenic values (denoted with a "N" flag)
correspond to a target hazard quotient of 0.1. Carcinogenic values represent an incremental cancer risk of 1E-06 (carcinogens denoted with a "C" flag).
6 - The chemical is selected as a COPC if the maximum detected concentration exceeds the risk-based COPC screening level.
7 - Value is for pyrene.
8 - Value is for chlordane.
9 - Value is for endosulfan.
10 - Value is for endrin.
11 - Hexavalent chromium was not detected in any soil sample, therefore total chromium was evaluated as trivalent chromium.
12 - Value is MCL based soil screening level.
Shaded criterion indicates that the maximum detected concentration exceeds one or more screening criteria. Shaded chemical name indicates that the
chemical was retained as a COPC.
Definitions:
ARAR/TBC = Applicable or Relevant and Appropriate Requirements To Be Considered
C = Carcinogen
COPC = Chemical Of Potential Concern
J = Estimated value
K = Analyte present. Reported value may be biased high. Actual values is expected to be lower.
L = Analyte present. Reported value may be biased low.
mg/kg = milligrams per kilogram
N = Noncarcinogen
NA = Not Applicable/Not Available
ug/kg = micrograms per kilogram
Rationale Codes:
For selection as a COPC:
ASL = Above Screening Level.
For elimination as a COPC:
BSL = Below COPC Screening Level
NUT = Essential nutrient
NTX = No toxicity criteria
-------
Scenario Timeframe: Current/Future
Medium: Subsurface Soil
Exposure Medium: Subsurface Soii
TABLE 2.3
OCCURRENCE, DISTRIBUTION, AND SELECTION OF CHEMICALS OF POTENTIAL CONCERN - DIRECT CONTACT WITH SUBSURFACE SOIL
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Exposure
Point
CAS
Number
Chemical
Minimum
Concentration'1'
Maximum
Concentration'1'
Units
Sample of Maximum
Concentration
Freguency
of
Detection
Range of
Detection
Limits'2'
Concentration
Used for
Screening'3'
Range of
Background
Concentrations'4'
USEPA RSL
Residential SoilP)
Potential
ARAR/TBC
Potential
ARAR/TBC
Source
COPC
Flag
Rationale for
Contaminant
Deletion or
Selection'5'
OWR
Semivolatile Organic Compounds |
117-81-7
Bis(2-Ethylhexyl) Phthalate
44 J
630
ug/kg
OWR-SB-4DP1-17-201
12/18
330- 330
630
NA
39,000 C
NA
NA
No
BSL
84-66-2
Diethyl Phthalate
110 J
110 J
ug/kg
OWR-SB-4DP1-17-201
1/18
330- 330
110
NA
5,100,000 N
NA
NA
No
BSL
inorganics
7429-90-5
Aluminum
273
21,500
mq/kq
OWR-SB-4DP10-20-201
18/18
21,500
NA
Mfflmmmmiiimim®
NA
NA
Yes
ASL
7440-36-0
Antimony
0.69 JL
1.1 JL
mg/kg
OWR-SB-4DP10-20-201
4/18
12- 12
1.1
NA
3.1 N
NA
NA
No
BSL
7440-38-2
Arsenic
1.8 JK
4 K
mg/kg
OWR-SB-2TP9-1-201
5/18
2-2
4
NA
0.68 C
NA
NA
Yes
ASL
7440-39-3
Barium
3.4 J
84
mg/kg
OWR-SB-4DP10-20-201
18/18
84
NA
1,500 N
NA
NA
No
BSL
7440-41-7
Beryllium
0.061 J
1.3
mg/kg
OWR-SB-4DP10-20-201
7/18
0.069- 0.29
1.3
NA
16 N
NA
NA
No
BSL
7440-70-2
Calcium
4.3 JL
1,020 J
mq/kq
OWR-SB-2TP6-12-201
17/18
723.5- 1000
1,020
NA
NA
NA
NA
No
NUT
7440-47-3
Chromium
0.63 J
20.1
mg/kg
OWR-SB-2TP9-1-201
17/18
0.25-0.25
20.1
NA
12,000 N(7)
NA
NA
No
BSL
7440-48-4
Cobalt
0.23 J
17.6
mg/kg
OWR-SB-4DP10-20-201
11/18
o
o
17.6
NA
2.3 N
NA
NA
gggjggg
ASL
7440-50-8
! Copper
0.16 J
84.9
mg/kg
OWR-SB-4DP10-20-201
18/18
84.9
NA
j 310 N |
NA
NA
ran
BSL
7439-89-6
Iron
289
42,000
mg/kg
OWR-SB-4DP10-20-201
18/18
42,000
NA
NA
NA
ASL
7439-92-1
Lead
0.61 L
13.5
mg/kg
OWR-SB-1TP9-15-201
18/18
13.5
NA
j 200 (8) |
NA
NA
No
BSL
7439-95-4
Magnesium
18.6 J
13,900
mq/kq
OWR-SB-4DP10-20-201
17/18
13- 13
13,900
NA
I NA |
NA
NA
j No
NUT
7439-96-5
Manganese
2.1 J
379 J
mg/kg
OWR-SB-2TP6-12-201
16/18
0.56-0.67
379
NA
180 N
NA
NA
Yes
ASL
7440-02-0
Nickel
0.31 J
15.2
mg/kg
OWR-SB-4DP10-20-201
14/18
8-8
15.2
NA
150 N
NA
NA
No
BSL
7440-09-7
Potassium
57.8 J
14,200 J
mq/kq
OWR-SB-4DP10-20-201
18/18
14,200
NA
NA
NA
NA
No
NUT
7782-49-2
Selenium
1.4 L
1.4 L
mg/kg
OWR-SB-1 TP7/8-13-201
1/18
1 - 1
1.4
NA
39 N
NA
NA
No
BSL
7440-28-0
Thallium
1.8 JK
5.6
mg/kg
OWR-SB-4DP10-20-201
9/18
1.45-2
5.6
NA
0.078 N
NA
NA
ASL
7440-62-2
Vanadium
0.24 J
52.4
mg/kg
OWR-SB-4DP10-20-201
18/18
52.4
NA
39 N
NA
NA
ASL
i 7440-66-6 iZinc
0.32 JL
45.8
mg/kg
OWR-SB-4DP10-20-201
16/18
4-4
45.8
NA
I 2,300 N I
NA
NA
I No I
BSL
Footnotes:
1 - Sample and duplicate are considered as two separate samples when determining the minimum and maximum concentrations.
2 - Values presented are sample-specific quantitation limits.
3 - The maximum detected concentration is used for screening purposes.
4 - No background data available for subsurface soil.
5 - USEPA Regional Screening Levels (RSLs) for Chemical Contaminants at Superfund Sites, May 2018. The noncarcinogenic values (denoted with a "N" flag)
correspond to a target hazard quotient of 0.1. Carcinogenic values represent an incremental cancer risk of 1E-06 (carcinogens denoted with a "C" flag).
6 - The chemical is selected as a COPC if the maximum detected concentration exceeds the risk-based COPC screening level.
7 - Hexavalent chromium was not detected in any soil sample, therefore total chromium was evaluated as trivalent chromium.
8 - USEPA, 2016.Updated Scientific Considerations for Lead in Soil Cleanups, December.
Shaded criterion indicates that the maximum detected concentration exceeds one or more screening criteria. Shaded chemical name indicates that the
chemical was retained as a COPC.
Definitions:
ARAR/TBC = Applicable or Relevant and Appropriate Requirements To Be Considered
C = Carcinogen
COPC = Chemical Of Potential Concern
J = Estimated value
K = Analyte present. Reported value may be biased high. Actual values is expected to be lower
L = Analyte present. Reported value may be biased low.
mg/kg = milligrams per kilogram
N = Noncarcinogen
NA = Not Applicable/Not Available
ug/kg = micrograms per kilogram
Rationale Codes:
For selection as a COPC:
ASL = Above Screening Level.
For elimination as a COPC:
BSL = Below COPC Screening Level
NUT = Essential nutrient
-------
Scenario Timeframe: Current/Future
Medium: Subsurface Soil
Exposure Medium: Subsurface Soii
TABLE 2.4
OCCURRENCE, DISTRIBUTION, AND SELECTION OF CHEMICALS OF POTENTIAL CONCERN - MIGRATION FROM SUBSURFACE SOIL TO GROUNDWATER
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Exposure
Point
CAS
Number
Chemical
Minimum
Concentration'1'
Maximum
Concentration'1'
Units
Sample of Maximum
Concentration
Freguency
of
Detection
Range of
Detection
Limits'2'
Concentration
Used for
Screening'3'
Range of
Background
Concentrations'4'
USEPA RSL
Migration from Soil
to Groundwater'5'
Potential
ARAR/TBC
Potential
ARAR/TBC
Source
COPC
Flag
Rationale tor
Contaminant
Deletion or
Selection'5'
OWR
Semi volatile Organic Compounds |
117-81-7
Bis(2-Ethylhexyl) Phthalate
44 J
630
ug/kg
OWR-SB-4DP1-17-201
12/18
330- 330
630
NA
1,300 C
NA
NA
No
BSL
84-66-2
Diethyl Phthalate
110 J
110 J
ug/kg
OWR-SB-4DP1-17-201
1/18
330- 330
110
NA
610 N
NA
NA
No
BSL
Inorganics
7440-36-0
0.69 JL
1.1 JL
mg/kg
OWR-SB-4DP10-20-201
4/18
12- 12
1.1
NA
0.035 N
NA
NA
ASL
7440-38-2
1.8 JK
4 K
mq/kq
OWR-SB-2TP9-1-201
5/18
2-2
4
NA
0.0015 C
NA
NA
ASL
7440-39-3
2 4 J
84
mg/kg
OWR-SB-4DP10-20-201
18/18
84
NA
16 N
NA
NA
ASL
7440-41-7
Beryllium
0.061 J
1.3
mg/kg
OWR-SB-4DP10-20-201
7/18
0.069- 0.29
1.3
NA
r 1.9 N
NA
NA
No
BSL
7440-70-2
Calcium
4.3 JL
1,020 J
mg/kg
OWR-SB-2TP6-12-201
17/18
723.5- 1000
1,020
NA
NA
NA
NA
No
NUT
7440-47-3
Chromium
0.63 J
20.1
mg/kg
OWR-SB-2TP9-1-201
17/18
0.25-0.25
20.1
NA
4,000,000 N(7)
NA
NA
No
BSL
7440-48-4
Cobalt
0.23 J
17.6
mq/kq
OWR-SB-4DP10-20-201
11/18
o
o
17.6
NA
0.027 N
NA
NA
ASL
7440-50-8
Copper
0.16 J
84.9
mq/kq
OWR-SB-4DP10-20-201
18/18
84.9
NA
2.8 N
NA
NA
ASL
7439-89-6
Iron
289
42,000
mg/kg
OWR-SB-4DP10-20-201
18/18
42,000
NA
35 N
NA
NA
ASL
7439-92-1
Lead
0.61 L
13.5
mg/kg
OWR-SB-1TP9-15-201
18/18
13.5
NA
14(8)
NA
NA
! No
BSL
7439-95-4
Magnesium
18.6 J
13,900
mg/kg
OWR-SB-4DP10-20-201
17/18
13- 13
13,900
NA
NA
NA
NA
jNo
NUT
7439-96-5
Manganese
2.1 J
379 J
mg/kg
OWR-SB-2TP6-12-201
16/18
0.56-0.67
379
NA
2.8 N
NA
NA
ASL
7440-02-0
Nickel
0.31 J
15.2
mg/kg
OWR-SB-4DP10-20-201
14/18
8-8
15.2
NA
2.6 N
NA
NA
ASL
I 7440-09-7 |Potassium
57.8 J
14,200 J
mg/kg
OWR-SB-4DP10-20-201
18/18
14,200
NA
i NA
NA
NA
! No
NUT
7782-49-2
Selenium
1.4 L
1.4 L
mg/kg
OWR-SB-1 TP7/8-13-201
1/18
1 - 1
1.4
NA
0.052 N
NA
NA
Yes
ASL
7440-28-0
Thallium
1.8 JK
5.6
mg/kg
OWR-SB-4DP10-20-201
9/18
1.45-2
5.6
NA
0.0014 N
NA
NA
Yes
ASL
7440-62-2
Vanadium
0.24 J
52.4
mg/kg
OWR-SB-4DP10-20-201
18/18
52.4
NA
8.6 N
NA
NA
Yes
ASL
7440-66-6
Zinc
0.32 JL
45.8
mg/kg
OWR-SB-4DP10-20-201
16/18
4-4
45.8
NA
37 N
NA
NA
Yes
ASL
Footnotes:
1 - Sample and duplicate are considered as two separate samples when determining the minimum and maximum concentrations.
2 - Values presented are sample-specific quantitation limits.
3 - The maximum detected concentration is used for screening purposes.
4 - No background data available for subsurface soil.
5 - USEPA Regional Screening Levels (RSLs) for Chemical Contaminants at Superfund Sites, May 2018. The noncarcinogenic values (denoted with a "N" flag)
correspond to a target hazard quotient of 0.1. Carcinogenic values represent an incremental cancer risk of 1E-06 (carcinogens denoted with a "C" flag).
6 - The chemical is selected as a COPC if the maximum detected concentration exceeds the risk-based COPC screening level
7 - Hexavalent chromium was not detected in any soil sample, therefore total chromium was evaluated as trivalent chromium.
8 - Value is MCL based soil screening level.
Shaded criterion indicates that the maximum detected concentration exceeds one or more screening criteria. Shaded chemical name indicates that the
chemical was retained as a COPC.
Definitions:
ARAR/TBC = Applicable or Relevant and Appropriate Requirements To Be Considered
C = Carcinogen
COPC = Chemical Of Potential Concern
J = Estimated value
K = Analyte present. Reported value may be biased high. Actual values is expected to be lower
L = Analyte present. Reported value may be biased low.
mg/kg = milligrams per kilogram
N = Noncarcinogen
NA = Not Applicable/Not Available
ug/kg = micrograms per kilogram
Rationale Codes:
For selection as a COPC:
ASL = Above Screening Level.
For elimination as a COPC:
BSL = Below COPC Screening Level
NUT = Essential nutrient
-------
OCCURRENCE, DISTRIBUTION,
Scenario Timeframe: Current/Future
Medium: Groundwater
Exposure Medium: Groundwater
TABLE 2.5
SELECTION OF CHEMICALS OF POTENTIAL CONCERN - DIRECT CONTACT WITH GROUNDWATER
OLD WILMINGTON ROAD SITE
PAGE 1 OF 2
Exposure
Point
CAS
Number
Chemical
Minimum
Concentration'1'
Maximum
Concentration'1'
Units
Sample of Maximum
Concentration
Frequency
of
Detection
Range of
Detection
Limits'2'
Concentration
Used for
Screening'3'
Range of
Background
Concentrations'4'
USEPA RSL
Tap water'5'
Potential
ARAR/TBC
Potential
ARAR/TBC
Source
COPC
Flag
Rationale for
Contaminant
Deletion or
Selection*6'
OWR
Volatile Organic Compounds |
71-55-6
1,1,1-Trichloroethane
0.11 J
10
ug/L
OWR-MW03-0816
23/61
0.5-50
10
ND
800 N
NA
NA
No
BSL
76-13-1
1,1,2-Trichloro-1,2,2-Trifluoroethane
0.82
5
ug/L
OWR-MW-08S-0816-RS
7/47
0.5-50
5
ND
1,000 N
NA
NA
No
BSL
75-34-3
1,1-Dichloroethane
0.15 J
2.6
ug/L
OWR-MW08S-0117
37/65
0.5-50
2.6
ND
2.8 C
NA
NA
No
BSL
75-35-4
1,1-Dichloroethene
0.35 J
3.9
ug/L
OWR-MW-08S-0816-RS
6/61
0.5-50
3.9
ND
28 N
NA
NA
No
BSL
106-46-7
1,4-Dichlorobenzene
0.11 J
0.11 J
ug/L
OWR-MW10D-0117
1/61
0.5-50
0.11
ND
0.48 C
NA
NA
No
BSL
7-Butanone
2 J
1,300
ug/L
OWR-MW17-PORT1-110617
9/61
5-500
1,300
ND
560 N
NA
NA
ikygl
ASL
591-78-6
/-Hexanone
41
41
uq/L
OWR-MW17-PORT1-110617
1/61
5-500
41
ND
3.8 N
NA
NA
W9
ASL
108-10-1
4-Methyl-2-Pentanone
0.58 J
1.3 J
ug/L
OWR-MW17-PORT1-0117
2/61
5-500
1.3
ND
630 N
NA
NA
No
BSL
67-64-1
Acetone
2.7 J
91 J
uq/L
OWR-MW17-PORT1-110617
21/62
5-500
91
6-8.8
1,400 N
NA
NA
No
BSL
75-15-0
Carbon Disulfide
0.31 J
14
uq/L
OWR-MW13-0816
14/63
0.5-50
14
ND
81 N
NA
NA
No
BSL
108-90-7
Chlorobenzene
0.12 J
0.12 J
uq/L
OWR-MW-06-0815
1/61
0.5-50
0.12
ND
7.8 N
NA
NA
No
BSL
67-66-3
Chloroform
5.4
9.4
uq/L
OWR-MW-01-0815
2/61
0.5-50
9.4
ND
0.22 C
NA
NA
Yes
ASL
74-87-3
Chloromethane
0.11 J
0.53 J
ug/L
OWR-MW06-0117
8/61
0.5-50
0.53
ND
19N
NA
NA
No
BSL
156-59-2
cis-1,2-Dichloroethene
0.19 J
6.6
ug/L
OWR-MW17-PORT4-110617
20/63
0.5-50
6.6
ND
3.6 N
NA
NA
Yes
ASL
-
m,p-Xylene
0.1 J
0.1 J
ug/L
OWR-MW13-0117
1/61
0.5-50
0.1
ND
19 N(7)
NA
NA
No
BSL
79-20-9
Methyl Acetate
0.77
22
uq/L
OWR-MW17-PORT4-0117
9/62
0.5-50
22
ND
2,000 N
NA
NA
No
BSL
1634-04-4
Methyl Tert-Butyl Ether
0.23 J
15
uq/L
OWR-MW-10S-0815
43/62
0.5-50
15
0.52-0.82
14 C
NA
NA
Yes
ASL
75-09-2
Methylene Chloride
0.12 J
1.4 J-
ug/L
O W R- M W18- PO R T2-0816
4/62
0.5-50
1.4
ND
Tin
NA
NA
No
BSL
95-47-6
o-Xylene
0.11 J
0.11 J
ug/L
OWR-MW14-PORT2-0117
1/61
0.5-50
0.11
ND
19 N
NA
NA
No
BSL
127-18-4
Tetrachloroethene
0.13 J
190
uq/L
OWR-MW-05-0815
29/63
0.5-50
190
0.15 J
4.1 N
NA
NA
Yes
ASL
108-88-3
Toluene
0.1 J
13
ug/L
OWR-MW-23-PORT3-0816-RS
27/67
0.5-50
13
ND
110 N
NA
NA
No
BSL
79-01-6
Trichloroethene
0.16 J
27
uq/L
OWR-MW-08S-0816-RS
29/63
0.5-50
27
ND
0.28 N
NA
NA
Yes
ASL
75-69-4
Trichlorofluoromethane
0.1 J
0.75
ug/L
OWR-MW-08S-0816-RS
7/47
0.5-50
0.75
ND
520 N
NA
NA
No
BSL
75-01-4
Vinyl Chloride
0.16 J
0.57
uq/L
OWR-MW21-0117
3/61
0.5-50
0.57
ND
IWflfWH'TT'Ti fcTW
NA
NA
Yes
ASL
Semivolatile Organic Compounds
123-91-1
1.1-Dioxane
1 J
5.1 J
ug/L
OWR-MW17-PORT1-0117
19/64
2- 100
5.1
ND
0.46 C
NA
NA
Yes
ASL
106-44-5
4-Methylphenol
1.1 J
4.3 J
ug/L
OWR-MW17-PORT4-110617
5/62
10-500
4.3
ND
190 N
NA
NA
No
BSL
98-86-2
Acetophenone
1.1 J
12
ug/L
OWR-MW17-PORT2-110617
5/64
10-500
12
ND
190 N
NA
NA
No
BSL
100-52-7
Benzaldehyde
1.3 J
4.9 J
ug/L
OWR-MW17-PORT2-110617
2/64
10-500
4.9
ND
19 C
NA
NA
No
BSL
117-81-7
Bis(2-ethylhexyl)phthalate
1.3 J
11
uq/L
OWR-MW15-0816
4/64
5-250
11
ND
5.6 C
NA
NA
Yes
ASL
85-68-7
Benzyl Butyl Phthalate
1.4 J
3.2 J
ug/L
OWR-MW17-PORT2-0816
10/64
5-250
3.2
1.6 J-3.6 J
16 C
NA
NA
No
BSL
105-60-2
Caprolactam
3.5 J
2,800
uq/L
OWR-MW17-PORT1-110617
14/64
10- 11
2,800
ND
990 N
NA
NA
Yes
ASL
84-66-2
Diethylphthalate
1.2 J
2.7 J
ug/L
OWR-MW17-PORT4-110617
3/64
5-250
2.7
ND
1,500 N
NA
NA
No
BSL
131-11-3
Dimethylphthalate
2.3 J
2.3 J
ug/L
OWR-MW-06-0815
1/64
5-250
2.3
ND
NA
NA
NA
No
NTX
84-74-2
Di-N-Butylphthalate
1.2 J
41
ug/L
OWR-MW18-PORT2-0816
5/64
5-250
41
1.6 J- 1.6 J
90 N
NA
NA
No
BSL
108-95-2
Phenol
2.5 J
4.3 J
uq/L
OWR-MW17-PORT4-110617
3/64
10-500
4.3
ND
580 N
NA
NA
No
BSL
Semivolatiles-Sim
123-91-1
1,4-Dioxane
0.12 J
20 J
ug/L
OWR-MW18-PORT2-0816
39/50
0.4-0.5
20
0.21 J-0.58 J
0.46 C
NA
NA
H
i ASL
Total Inorganics
7429-90-
14.1 J
301,000
ug/L
OWR-MW-06-0815
56/59
20-20
301,000
103-139
2,000 N
NA
NA
Yes
ASL
7440-36-
0.23 J
10.2 J
ug/L
O W R- M W17- PO R T2- 0117
7/59
2-2
10.2
ND
0.78 N
NA
NA
Yes
ASL
7440-38-
0.07 J
60.1
ug/L
O W R- M W23- PO R T2- 0117
32/59
1 - 1
60.1
0.46 J-0.46 J
0.052 C
NA
NA
Yes
ASL
7440-39-
15.2
3,310
ug/L
OWR-MW23-PORT3-0816
58/59
10- 10
3,310
128-143
380 N
NA
NA
Yes
ASL
7440-41-
0.23 J
17.8
ug/L
O W R- M W23- PO R T2- 0117
13/59
1 - 1
17.8
0.17 J - 0.19 J
2.5 N
NA
NA
Yes
ASL
7440-43-9
Cadmium
0.1 J
1.5
ug/L
OWR-MW-06-0815
9/59
1 - 10
1.5
0.1 J-0.1 J
0.92 N
NA
NA
Yes
ASL
7440-70-2
Calcium
419 J
170,000
ug/L
OWR-MW21-0117
57/59
500 - 500
170,000
2,150- 2,470
NA
NA
NA
No
NUT
7440-47-3
Chromium
2.1
546
ug/L
OWR-MW06-0816
42/62
2-2
546
ND
2,200 N(8)
NA
NA
No
BSL
7440-48-4
Cobalt
0.11 J
232
ug/L
OWR-MW10D-0816
51/59
1 - 1
232
5.6-6.6
0.6 N
NA
NA
Yes
ASL
7440-50-8
Copper
0.5 J
739
ug/L
OWR-MW-06-0815
45/59
1.2-2
739
11.4- 13.9
80 N
NA
NA
Yes
ASL
7439-89-6
Iron
55.8 J
380,000 J
uq/L
OWR-MW17-PORT2-0117
49/59
42.6- 200
380,000
14.5J-21.6J
1,400 N
NA
NA
Yes
ASL
7439-92-1
Lead
0.11 J
217
ug/L
OWR-MW17-PORT2-0117
32/59
1 - 1
217
0.2 J-0.2 J
15
NA
NA
Yes
ASL
i 7439-95-4 jMaqnesium
677
81,400
uq/L
OWR-MW17-PORT2-0117
59/59
81,400
3,050- 3,530
! NA
NA
NA
I No
NUT
7439-96-5
Manganese
3.8
10,900
ug/L
OWR-MW10D-0816
59/59
10,900
243 - 308
43 N
NA
NA
Yes
ASL
7439-97-6
Mercury
0.021 J-
0.23
uq/L
OWR-MW06-0117
17/48
0.2-2
0.23
0.25-0.71
0.063 N
NA
NA
Yes
ASL
7440-02-0
Nickel
0.4 J
368
ug/L
OWR-MW-06-0815
56/59
1 - 1
368
2.9-3.3
39 N
NA
NA
Yes
ASL
i 9/7/7440 iPotassium
1,210
35,100
uq/L
OWR-MW13-0816
59/59
35,100
2,270- 2,390
! NA
NA
I No
NUT
7782-49-2
Selenium
0.49 J
15.2
ug/L
O W R- M W17- PO R T2- 0816
13/59
5-50
15.2
ND
10 N
NA
NA
Yes
ASL
7440-22-4
Silver
0.029 J
4.7
uq/L
OWR-MW-06-0815
10/59
1 - 1
4.7
ND
9.4 N
NA
NA
No
BSL
7440-23-5
Sodium
1,640
678,000
ug/L
OWR-MW17-PORT1-0117
59/59
678,000
9,260- 12,300
NA
NA
|n^i
NUT
7440-28-0
Ilium
0.1 J
2.3
ug/L
OWR-MW23-PORT2-0117
11/59
1 - 10
2.3
ND
0.02 N
NA
NA
ASL
7440-62-2
adium
0.19 J
93.6
ug/L
OWR-MW-06-0815
31/59
1.675-5
93.6
ND
8.6 N
NA
NA
ASL
7440-66-6
Zinc
2.9
2,020
ug/L
OWR-MW14-PORT2-0816
58/59
2-2
2,020
2.8- 14.4
600 N
NA
NA
ASL
-------
OCCURRENCE, DISTRIBUTION,
Scenario Timeframe: Current/Future
Medium: Groundwater
Exposure Medium: Groundwater
TABLE 2.5
SELECTION OF CHEMICALS OF POTENTIAL CONCERN - DIRECT CONTACT WITH GROUNDWATER
OLD WILMINGTON ROAD SITE
PAGE 2 OF 2
Exposure
Point
CAS
Number
Chemical
Minimum
Concentration'1'
Maximum
Concentration'1'
Units
Sample of Maximum
Concentration
Frequency
of
Detection
Range of
Detection
Limits'2'
Concentration
Used for
Screening'3'
Range of
Background
Concentrations'4'
USEPA RSL
Tap water'5'
Potential
ARAR/TBC
Potential
ARAR/TBC
Source
COPC
Flag
Rationale for
Contaminant
Deletion or
Selection*6'
OWR
Dissolved Inorganics
7429-90-5
Aluminum
12.7 J
3,920
ug/L
OWR-MW-04-0815
26/54
20-20
3,920
98.6- 121
2,000 N
NA
NA
ASL
7440-36-0
Antimony
0.35 J
6.6
uq/L
OWR-MW-01-0815
8/54
2-2
6.6
ND
0.78 N
NA
NA
ASL
7440-38-2
Arsenic
1.1
21.4
ug/L
OWR-MW17-PORT3-0816
13/54
1 - 2
21.4
ND
0.052 C
NA
NA
ASL
7440-39-3
Barium
2.4 J
215
ug/L
OWR-MW10S-0816
49/54
o
o
215
127-132
380 N
NA
NA
No
BSL
7440-41-7
Beryllium
0.05 J
0.87 J
ug/L
OWR-MW-04-0815
7/54
1 - 1
0.87
ND
2.5 N
NA
NA
No
BSL
7440-43-9
Cadmium
0.05 J
0.65 J
ug/L
OWR-MW-10S-0815
13/54
1 - 1
0.65
ND
0.92 N
NA
NA
No
BSL
7440-70-2
Calcium
666
89,000
ug/L
OWR-MW21-0117
50/54
500 - 500
89,000
2,190-2,210
NA
NA
NA
No
NUT
7440-47-3
Chromium
0.2 J
269
ug/L
OWR-MW17PORT1-20190408
24/57
2-4
76.2
ND
2,200 N(8)
NA
NA
No
BSL
7440-48-4
Cobalt
0.05 J
240
ug/L
OWR-MW10D-0816
39/54
1 - 1
240
5.7-6.5
0.6 N
NA
NA
Yes
ASL
7440-50-8
Copper
2.1
62.5
ug/L
OWR-MW04-0117
17/54
1 -4
62.5
10.5-10.8
! 80 N
NA
NA
I No
BSL
7439-89-6
Iron
34.9 J
61,000
ug/L
OWR-MW18-PORT2-0816
20/54
200 - 400
61,000
ND
NA
NA
Yes
ASL
7439-92-1
Lead
0.12 J-
14.2
ug/L
OWR-MW03-0117
9/54
1 -1
14.2
0.19 J-0.23 J
! 15
NA
NA
I
BSL
7439-95-4
Magnesium
220 J
26,000
ug/L
OWR-MW-04-0815
49/54
500 - 500
26,000
2,960- 3,120
i NA
NA
NA
[noJ
NUT
7439-96-5
Manganese
1.4 J
13,400
ug/L
OWR-MW10S-0816
51/54
1 - 1
13,400
249- 301
43 N
NA
NA
¦ETSB
ASL
7439-97-6
Mercury
0.021 J-
0.17 J
ug/L
OWR-MW80-0117-D
4/43
o
o
0.17
0.12 J--0.93
0.063 N
NA
NA
ASL
7440-02-0
Nickel
0.22 J
25.5
ug/L
OWR-MW10S-0816
41/54
1 - 1
25.5
2.8-3.3
39 N
NA
NA
jNol
BSL
7440-09-7
Potassium
402 J
35,800
uq/L
OWR-MW13-0816
53/54
500 - 500
35,800
2,180- 2,440
NA
NA
NA
I No
NUT
7782-49-2
Selenium
0.62 J
19.7
ug/L
O W R- M W17- PO R T2- 0816
10/54
5-5
19.7
ND
10 N
NA
NA
Yes
ASL
I 7440-23-5 jSodium
868
336,000
ug/L
OWR-MW-04-0815
54/54
336,000
8,880- 11,200
i NA
NA
NA
I No
NUT
7440-28-0
Thallium
0.06 J
0.43 J
ug/L
OWR-MW10S-0816
4/54
0.53- 1
0.43
ND
0.02 N
NA
NA
Yes
ASL
7440-62-2
Vanadium
0.82 J
14.3
ug/L
O W R- M W17- PO R T3- 0816
11/54
0.34- 10
14.3
ND
8.6 N
NA
NA
Yes
ASL
7440-66-6
Zinc
1.3 J
1,870 J
ug/L
OWR-MW10D-0816
46/54
2-12.4
1,870
2.3 J - 10.7
600 N
NA
NA
Yes
ASL
Footnotes:
1 - Sample and duplicate are considered as two separate samples when determining the minimum and maximum concentrations.
2 - Values presented are sample-specific quantitation limits.
3 - The maximum detected concentration is used for screening purposes.
4 - Range of concentrations in monitoring well MW-19. Background values are present for information purposes only and were not used for COPC selection.
5 - USEPA Regional Screening Levels (RSLs) for Chemical Contaminants at Superfund Sites, May 2018. RSLs for carcinogens correspond
to an integrated lifetime cancer risk (ILCR) of 1E-06; RSLs for noncarcinogens correspond to a hazard quotient (HQ) of 0.1.
6 - The chemical is selected as a COPC if the maximum detected concentration exceeds the risk-based COPC screening level.
7 - Value is for xylenes.
8 - Hexavalent chromium was not detected in any groundwater sample, therefore total chromium was evaluated as trivalent chromium.
Shaded criterion indicates that the maximum detected concentration exceeds one or more screening criteria. Shaded chemical name indicates that the
chemical was retained as a COPC.
Definitions:
ARAR/TBC = Applicable or Relevant and Appropriate Requirements To Be Considered
C = Carcinogen
COPC = Chemical Of Potential Concern
J = Estimated value
J- = Analyte present but reported value may be biased low
N = Noncarcinogen
NA = Not Applicable/Not Available
ug/L = micrograms per liter
Rationale Codes:
For selection as a COPC:
ASL = Above Screening Level.
For elimination as a COPC:
BSL = Below COPC Screening Level
NUT = Essential nutrient
NTX = No toxicity criteria
-------
TABLE 2.6
OCCURRENCE, DISTRIBUTION, AND SELECTION OF CHEMICALS OF POTENTIAL CONCERN - VAPOR INTRUSION
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Current/Future
Medium: Groundwater
Exposure Medium: Air
Exposure
Point
CAS
Number
Chemical
Minimum
Concentration'1'
Maximum
Concent ration'1'
Units
Sample of Maximum
Concentration
Freguency
of
Detection
Range of
Detection
Limits'2'
Concentration
Used for
Screening*3'
Range of
Background
Concentrations'4'
USEPA
VISL'5'
Potential
ARAR/TBC
Potential
ARAR/TBC
Source
COPC
Flag
Rationale for
Contaminant
Deletion or
Selection'6'
OWR
Volatile Organic Compounds |
71-55-6
1,1,1-Trichloroethane
0.11 J
10
uq/L
OWR-MW03-0816
23/61
0.5-50
10
ND
740 N
NA
NA
No
BSL
76-13-1
1,1,2-Trichloro-1,2,2-Trifluoroethane
0.82
5
ug/L
OWR-MW-08S-0816-RS
7/47
0.5-50
5
ND
24 N
NA
NA
No
BSL
75-34-3
1,1-Dichloroethane
0.15 J
2.6
ug/L
OWR-MW08S-0117
37/65
0.5-50
2.6
ND
7.6 C
NA
NA
No
BSL
75-35-4
1,1-Dichloroethene
0.35 J
3.9
ug/L
OWR-MW-08S-0816-RS
6/61
0.5-50
3.9
ND
20 N
NA
NA
No
BSL
106-46-7
1,4-Dichlorobenzene
0.11 J
0.11 J
ug/L
OWR-MW10D-0117
1/61
0.5-50
0.11
ND
2.6 C
NA
NA
No
BSL
78-93-3
2-Butanone
2 J
1,300
ug/L
OWR-MW17-PORT1-110617
9/61
5-500
1,300
ND
220,000 N
NA
NA
No
BSL
591-78-6
2-Hexanone
41
41
ug/L
OWR- MW17- PO RT1 -110617
1/61
5-500
41
ND
820 N
NA
NA
No
BSL
108-10-1
4-Methyl-2-Pentanone
0.58 J
1.3 J
ug/L
OWR-MW17-PORT1-0117
2/61
5-500
1.3
ND
56,000 N
NA
NA
No
BSL
67-64-1
Acetone
2.7 J
91 J
uq/L
OWR-MW17-PORT1-110617
21/62
5-500
91
6-8.8
2,300,000 N
NA
NA
No
BSL
75-15-0
Carbon Disulfide
0.31 J
14
ug/L
OWR-MW13-0816
14/63
0.5-50
14
ND
120 N
NA
NA
No
BSL
108-90-7
Chlorobenzene
0.12 J
0.12 J
ug/L
OWR-MW-06-0815
1/61
0.5-50
0.12
ND
41 N
NA
NA
No
BSL
67-66-3
Chloroform
5.4
9.4
ug/L
OWR-MW-01-0815
2/61
0.5-50
9.4
ND
0.81 C
NA
NA
Yes
ASL
74-87-3
Chloromethane
0.11 J
0.53 J
ug/L
OWR-MW06-0117
8/61
0.5-50
0.53
ND
26 N
NA
NA
No
BSL
156-59-2
cis-1,2-Dichloroethene
0.19 J
6.6
ug/L
O W R- M W17- PO R T4-110617
20/63
0.5-50
6.6
ND
NA
NA
NA
No
NTX
m,p-Xylene
0.1 J
0.1 J
ug/L
OWR-MW13-0117
1/61
0.5-50
0.1
ND
36 N(7)
NA
NA
No
BSL
79-20-9
Methyl Acetate
0.77
22
ug/L
O W R- M W17- PO R T4- 0117
9/62
0.5-50
22
ND
NA
NA
NA
No
NTX
1634-04-4
Methyl Tert-Butyl Ether
0.23 J
15
ug/L
OWR-MW-10S-0815
43/62
0.5-50
15
0.52-0.82
450 C
NA
NA
No
BSL
75-09-2
Methylene Chloride
0.12 J
1.4 J-
ug/L
OWR-MW18-PORT2-0816
4/62
0.5-50
1.4
ND
470 N
NA
NA
No
BSL
95-47-6
o-Xylene
0.11 J
0.11 J
ug/L
O W R- M W14- PO R T2- 0117
1/61
0.5-50
0.11
ND
49 N
NA
NA
No
BSL
127-18-4
Tetrachloroethene
0.13 J
190
ug/L
OWR-MW-05-0815
29/63
0.5-50
190
0.15 J
5.8 N
NA
NA
Yes
ASL
108-88-3
Toluene
0.1 J
13
ug/L
OWR-MW-23-PORT3-0816-RS
27/67
0.5-50
13
ND
1,900 N
NA
NA
No
BSL
79-01-6
Trichloroethene
0.16 J
27
ug/L
OWR-MW-08S-0816-RS
29/63
0.5-50
27
ND
0.52 N
NA
NA
Yes
ASL
75-69-4
Ifrichlorofluorometh
0.1 J
0.75
ug/L
OWR-MW-08S-0816-RS
7/47
0.5-50
0.75
ND
I NA |
NA
NA
I No
NTX
75-01-4
Vinyl Chloride
0.16 J
0.57
ug/L
OWR-MW21-0117
3/61
0.5-50
0.57
ND
0.15 C
NA
NA
Yes
ASL
ISemivolatile Organic Compounds
123-91-1
1,4-Dioxane
1 J
5.1 J
ug/L
OWR-MW17-PORT1-0117
19/64
2- 100
5.1
ND
2,900 C
NA
NA
No
BSL
106-44-5
4-Methylphenol
1.1 J
4.3 J
ug/L
O W R- M W17- PO R T4-110617
5/62
10-500
4.3
ND
NA
NA
NA
No
NTX
98-86-2
Acetophenone
1.1 J
12
ug/L
OWR-MW17-PORT2-110617
5/64
10-500
12
ND
NA
NA
NA
No
NTX
100-52-7
Benzaldehyde
1.3 J
4.9 J
ug/L
OWR-MW17-PORT2-110617
2/64
10-500
4.9
ND
NA
NA
NA
No
NTX
117-81-7
Bis(2-ethylhexyl)phthalate
1.3 J
11
ug/L
OWR-MW15-0816
4/64
5-250
11
ND
NA
NA
NA
No
NTX
85-68-7
Benzyl Butyl Phthalate
1.4 J
3.2 J
ug/L
O W R- M W17- PO R T2- 0816
10/64
5-250
3.2
1.6 J-3.6 J
NA
NA
NA
No
NTX
105-60-2
Caprolactam
3.5 J
2,800
ug/L
OWR-MW17-PORT1-110617
14/64
10-11
2,800
ND
NA
NA
NA
No
NTX
84-66-2
Diethyl phthalate
1.2 J
2.7 J
ug/L
O W R- M W17- PO R T4-110617
3/64
5-250
2.7
ND
NA
NA
NA
No
NTX
131-11-3
Dimethylphthalate
2.3 J
2.3 J
ug/L
OWR-MW-06-0815
1/64
5-250
2.3
ND
NA
NA
NA
No
NTX
84-74-2
Di-N-Butylphthalate
1.2 J
41
ug/L
OWR-MW18-PORT2-0816
5/64
5-250
41
1.6 J -1.6 J
NA
NA
NA
No
NTX
108-95-2
Phenol
2.5 J
4.3 J
ug/L
OWR-MW17-PORT4-110617
3/64
10-500
4.3
ND
NA
NA
NA
No
NTX
ISemivolatiles-Sim |
I 123-91-1 |
M,4-Dioxane
i 0.12 J |
I 20 J |
i uq/L
i O W R- M W18- PO R T2- 0816 |
i 39/50 |
i 0.4-0.5 |
I 20 |
I 0.21 J-0.58 J |
i 2,900 C |
i NA |
i NA |
i No
I BSL |
Footnotes:
1 - Sample and duplicate are considered as two separate samples when determining the minimum and maximum concentrations.
2 - Values presented are sample-specific quantitation limits.
3 - The maximum detected concentration is used for screening purposes.
4 - Range of concentrations in monitoring well MW-19. Background values are present for information purposes only and were not used for COPC selection.
5 - USEPA's Vapor Intrusion Screening Level (VISL) Calculator, Accessed May 16, 2018. The noncarcinogenic values (denoted with a "N" flag)
correspond to a target hazard quotient of 0.1. Carcinogenic values represent an incremental cancer risk of 1E-06 (carcinogens denoted with a "C" flag).
6 - The chemical is selected as a COPC if the maximum detected concentration exceeds the risk-based COPC screening level.
7 - Value is for m-xylenes.
Shaded criterion indicates that the maximum detected concentration exceeds one or more screening criteria. Shaded chemical name indicates that the
chemical was retained as a COPC.
Definitions:
ARAR/TBC = Applicable or Relevant and Appropriate Requirements To Be Considered
C = Carcinogen
COPC = Chemical Of Potential Concern
J = Estimated value
J- = Analyte present but reported value may be biased low
N = Noncarcinogen
NA = Not Applicable/Not Available
ug/L = micrograms per liter
Rationale Codes:
For selection as a COPC:
ASL = Above Screening Level.
For elimination as a COPC:
BSL = Below COPC Screening Level
NUT = Essential nutrient
NTX = No toxicity criteria
-------
Scenario Timeframe: Current/Future
Medium: Surface Water
Exposure Medium: Surface Water
TABLE 2.7
OCCURRENCE, DISTRIBUTION, AND SELECTION OF CHEMICALS OF POTENTIAL CONCERN - DIRECT CONTACT WITH SURFACE WATER
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Exposure
Point
CAS
Number
Chemical
Minimum
Concentration'1'
Maximum
Concentration'1'
Units
Sample of Maximum
Concentration
Frequency
of
Detection
Range of
Detection
Limits'2'
Concentration
Used for
Screening'3'
Range of
Background
Concentrations'4'
Screening Toxicity
Value'5'
Potential
ARAR/TBC
Potential
ARAR/TBC
Source
COPC
Flag
Rationale for
Contaminant
Deletion or
Selection'5'
OWR
Volatile Organic Compounds
71-55-6
1,1,1-Trichloroethane
0.31 J
0.69
ug/L
OWR-SW-06-0815
2/8
o
o
0.69
ND
8,000 N
NA
NA
No
BSL
76-13-1
1,1,2-Trichloro-1,2,2-Trifluoroethane
0.2 J
0.2 J
ug/L
OWR-SW-06-0815
1/8
o
o
0.2
ND
10,000 N
NA
NA
No
BSL
75-34-3
1,1-Dichloroethane
0.11 J
0.26 J
ug/L
OWR-SW-06-0815
2/8
o
o
0.26
ND
28 C
NA
NA
No
BSL
74-87-3
Chloromethane
0.29 J
0.29 J
ug/L
OWR-SW-07-0815
1/8
o
o
0.29
ND
190 N
NA
NA
No
BSL
156-59-2
cis-1,2-Dichloroethene
0.21 J
0.21 J
ug/L
OWR-SW-06-0815
1/8
o
o
0.21
ND
36 N
NA
NA
No
BSL
1634-04-4
Methyl Tert-Butyl Ether
0.26 J
0.33 J
ug/L
OWR-SW-06-0815
3/8
o
o
0.33
ND
140 C
NA
NA
No
BSL
75-09-2
Methylene Chloride
0.1 J
0.1 J
ug/L
OWR-SW-05-0815,
OWR-SW-07-0815
2/8
o
o
0.1
0.13 J
110 N
NA
NA
No
BSL
127-18-4
Tetrachloroethene
0.11 J
0.11 J
ug/L
OWR-SW-05-0815
1/8
o
o
0.11
ND
41 N
NA
NA
No
BSL
108-88-3
Toluene
0.61
0.61
ug/L
OWR-SW-06-0815
1/8
o
o
0.61
ND
1,100 N
NA
NA
No
BSL
79-01-6
Trichloroethene
0.45 J
1.3
uq/L
OWR-SW-06-0815
2/8
o
o
1.3
ND
2.8 N
NA
NA
No
BSL
Semivolatile Organic Compounds
131-11-3
Dimethylphthalate
2.6 J
3.6 J
ug/L
OWR-SW-05-0815
2/8
5-5
3.6
ND
NA
NA
NA
No
NTX
Total Inorganics
7429-90-5
Aluminum
50.4
351
ug/L
OWR-SW-17-0815
8/8
351
74.3- 142
20,000 N
NA
NA
No
BSL
7440-38-2
Arsenic
0.19 J
0.5 J
ug/L
OWR-SW-06-0815
8/8
0.5
0.25 J - 0.28 J
0.52 C
NA
NA
No
BSL
7440-39-3
Barium
56.6
487
ug/L
OWR-SW-05-0815
8/8
487
73.4- 77.5
3,800 N
NA
NA
No
BSL
7440-43-9
Cadmium
0.03 J
0.08 J
ug/L
OWR-SW-05-0815
7/8
1 -1
0.08
ND
9.2 N
NA
NA
No
BSL
7440-70-2
Calcium
2,160
30,100
ug/L
OWR-SW-17-0815
8/8
30,100
5,650- 5,970
NA
NA
NA
No
NUT
7440-47-3
Chromium
2.4 J
2.4 J
ug/L
OWR-SW-17-0815
3/10
0.25-2
2.4
ND
22,000 N(7)
NA
NA
No
BSL
7440-48-4
Cobalt
1 J
3.7
ug/L
OWR-SW-06-0815
3/8
1 - 1
3.7
ND
6 N
NA
NA
No
BSL
7440-50-8
Copper
2 J
2.6
ug/L
OWR-SW-05-0815
3/8
2-2
2.6
ND
800 N
NA
NA
No
BSL
7439-89-6
Iron
222
2,000
ug/L
OWR-SW-06-0815
7/8
200- 200
2,000
262
14,000 N
NA
NA
No
BSL
7439-92-1
Lead
1.1
1.2
ug/L
OWR-SW-07-0815
2/8
1 - 1
1.2
ND
15
NA
NA
No
BSL
7439-95-4
Magnesium
2,190
15,600
ug/L
OWR-SW-17-0815
8/8
15,600
4,880- 5,150
NA
NA
NA
No
NUT
7439-96-5
Manganese
15.8
362
ug/L
OWR-SW-05-0815
8/8
362
11.3-24
430 N
NA
NA
No
BSL
7440-02-0
Nickel
0.39 J
5.5 J
ug/L
OWR-SW-05-0815
8/8
5.5
0.4 J - 0.66 J
390 N
NA
NA
No
BSL
7440-09-7
Potassium
2,000
5,010
ug/L
OWR-SW-17-0815
8/8
5,010
2,600- 2,800
NA
NA
NA
No
NUT
7440-23-5
Sodium
6,710
26,000
ug/L
OWR-SW-06-0815
8/8
26,000
13,000- 13,800
NA
NA
NA
No
NUT
7440-28-0
Thallium
0.04 J
0.04 J
ug/L
OWR-SW-07-0815
1/8
1 - 1
0.04
ND
0.2 N
NA
NA
No
BSL
7440-66-6
Zinc
19.1 J +
36.1 J +
ug/L
OWR-SW-17-0815
6/8
o
o
36.1
10 J
6,000 N
NA
NA
No
BSL
Dissolved Inorganics
7429-90-5
Aluminum
3.3 J
36.2
ug/L
OWR-SW-07-0815
7/8
20-20
36.2
9.6 J - 12 J
20,000 N
NA
NA
No
BSL
7440-38-2
Arsenic
0.13 J
0.34 J
ug/L
OWR-SW-06-0815
8/8
0.34
0.22 J - 0.25 J
0.52 C
NA
NA
No
BSL
7440-39-3
Barium
38.2
91.2
ug/L
OWR-SW-17-0815
8/8
91.2
71.7-72.2
3,800 N
NA
NA
No
BSL
7440-70-2
Calcium
2,250
24,500
ug/L
OWR-SW-17-0815
8/8
24,500
5,610-5,860
NA
NA
NA
No
NUT
7440-47-3
Chromium
0.07 J
1.2 J
ug/L
OWR-SW16-20190408
9/10
2-2
1
0.12 J - 0.18 J
22,000 N(7)
NA
NA
No
BSL
7440-48-4
Cobalt
0.08 J
2.7
ug/L
OWR-SW-06-0815
8/8
2.7
0.05 J - 0.06 J
6 N
NA
NA
No
BSL
7440-50-8
Copper
0.85 J
1.6 J
ug/L
OWR-SW-07-0815
8/8
1.6
1.4 J - 1.5 J
800 N
NA
NA
No
BSL
7439-89-6
Iron
10.3 J
1,120
ug/L
OWR-SW-06-0815
8/8
1,120
19.1 J - 21.8 J
14,000 N
NA
NA
No
BSL
7439-95-4
Magnesium
2,230
13,500
ug/L
OWR-SW-17-0815
8/8
13,500
4,860- 5,390
NA
NA
NA
No
NUT
7439-96-5
Manganese
3.4
257
ug/L
OWR-SW-06-0815
8/8
257
4.1 - 8
430 N
NA
NA
No
BSL
7440-02-0
Nickel
0.2 J
1.7
ug/L
OWR-SW-06-0815
8/8
1.7
0.24 J - 0.3 J
390 N
NA
NA
No
BSL
7440-09-7
Potassium
1,880
5,130
ug/L
OWR-SW-17-0815
8/8
5,130
2,670- 2,900
NA
NA
NA
No
NUT
7440-23-5
Sodium
6,670
24,100
ug/L
OWR-SW-06-0815
8/8
24,100
13,200- 14,200
NA
NA
NA
No
NUT
7440-62-2
Vanadium
0.17 J
1.2 J
ug/L
OWR-SW-01-0815,
OWR-SW-17-0815
8/8
1.2
0.44 J - 0.47 J
86 N
NA
NA
No
BSL
7440-66-6
Zinc
5.8 J
15.7 J
ug/L
OWR-SW-07-0815
8/8
15.7
5.5 J - 8.3 J
6,000 N
NA
NA
No
BSL
Footnotes:
1 - Sample and duplicate are considered as two separate samples when determining the minimum and maximum concentrations.
2 - Values presented are sample-specific quantitation limits.
3 - The maximum detected concentration is used for screening purposes.
4 - Background data is presented for information purposes only and was not used in the selection of COPCs.
5 - The USEPA Regional Screening Level (May 2018) for tap water is presented. Value represents the tap water RSL multiplied by a factor of 10 for anticipated reduced
exposures to surface water. Before the factor is applied, the residential RSL for carcinogens corresponds to an incremental cancer risk of 1E-06 and for noncarcinogens
the RSL corresponds to a target hazard quotient of 0.1.
6 - The chemical is selected as a COPC if the maximum detected concentration exceeds the risk-based COPC screening level
8 - Hexavalent chromium was not detected in any surface water sample, therefore total chromium was evaluated as trivalent chromium.
Shaded criterion indicates that the maximum detected concentration exceeds one or more screening criteria. Shaded chemical name indicates that the
chemical was retained as a COPC.
Definitions:
ARAR/TBC = Applicable or Relevant and Appropriate Requirements To Be Considered
C = Carcinogen
COPC = Chemical Of Potential Concern
J = Estimated value
J+ = Analyte present but reported value may be biased high
N = Noncarcinogen
NA = Not Applicable/Not Available
ug/L = micrograms per liter
Rationale Codes:
For selection as a COPC:
ASL = Above Screening Level.
For elimination as a COPC:
BSL = Below COPC Screening Level
NUT = Essential nutrient
NTX = No toxicity criteria
-------
Scenario Timeframe: Current/Future
Medium: Sediment
Exposure Medium: Sediment
TABLE 2.8
OCCURRENCE, DISTRIBUTION, AND SELECTION OF CHEMICALS OF POTENTIAL CONCERN - DIRECT CONTACT WITH SEDIMENT
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Exposure Point
CAS
Number
Chemical
Minimum
Concentration'1'
Maximum
Concentration'1'
Units
Sample of Maximum
Concentration
Freguency
of
Detection
Range of
Detection
Limits'2'
Concentration
Used for
Screening'3'
Range of
Background
Concentrations'4'
Screening Toxicity
Value'5'
Potential
ARAR/TBC
Potential
ARAR/TBC
Source
COPC
Flag
Rationale for
Contaminant
Deletion or
Selection*6'
OWR
Volatile Organic Compounds |
75-34-3
1,1-Dichloroethane
2 J
6 J
uq/kq
OWR-S D06-061201
3/15
10-10
6
ND
36,000 C
NA
NA
No
BSL
75-15-0
Carbon Disulfide
2 J
2 J
ug/kg
OWR-SD14-061401,
OWR-S D20-061401
1/15
10-10
2
ND
770,000 N
NA
NA
No
BSL
75-00-3
Chloroethane
7 J
7 J
uq/kq
OWR-S D06-061201
1/15
10-10
7
ND
14,000,000 N
NA
NA
No
BSL
156-59-2
cis-1,2-Dichloroethylene
4 J
4 J
ug/kg
OWR-SD19-061201,
OWR-S D10-061301
2/15
10-10
4
ND
160,000 N
NA
NA
No
BSL
108-88-3
Toluene
3 J
24 J
uq/kq
OWR-S D06-061201
7/15
10-10
24
6 J - 7 J
4,900,000 N
NA
NA
No
BSL
79-01-6
Trichloroethene
2 J
2 J
uq/kq
OWR-S D19-061201
1/15
10-10
2
ND
4,100 N
NA
NA
No
BSL
Inorganics |
7429-90-5
Aluminum
4,430
20,800
mq/kq
OWR-SD10-061301
15/15
-
20,800
5,300- 11,700
77,000 N
NA
NA
No
BSL
7440-36-0
Antimony
0.99 JL
0.99 JL
mq/kq
OWR-SD14-061401
1/1
-
0.99
1.8 JL - 2.7 JL
31 N
NA
NA
No
BSL
7440-39-3
Barium
48.1 J
246
mq/kq
OWR-S D10-061301
15/15
-
246
87.8-181
15,000 N
NA
NA
No
BSL
7440-41-7
Beryllium
0.25 J
1.8 J
mq/kq
OWR-S D04-061201
15/15
-
1.8
0.54 J - 1 J
160 N
NA
NA
No
BSL
7440-43-9
Cadmium
1.7 J
1.7 J
mq/kq
OWR-SD15-061401
1/15
0.15-1.7
1.7
ND
71 N
NA
NA
No
BSL
7440-70-2
Calcium
540 J
7,700
mq/kq
OWR-S D01-061201
15/15
-
7,700
447 J- 1,050 J
NA
NA
NA
No
NUT
7440-47-3
Chromium
5.8
440
mg/kg
OWR-S D03-061201
17/17
-
440
6.3-14.7
120,000 N(7)
NA
NA
No
BSL
7440-48-4
Cobalt
1.5 J
34 J
mq/kq
OWR-SD04-061201
15/15
-
34
4.5 J- 10.6 J
23 N
NA
NA
Yes
ASL
7440-50-8
Copper
4.7 J
1,280
mq/kq
OWR-SDO3-061201
15/15
-
1,280
5.7 J-39
3,100 N
NA
NA
No
BSL
7439-89-6
Iron
3,330
28,600
mq/kq
OWR-SD02-061201
15/15
-
28,600
8,030-20,400
55,000 N
NA
NA
No
BSL
7439-92-1
Lead
12.5
166
mq/kq
OWR-S D13-061401
15/15
-
166
9.7-18.5
400
NA
NA
No
BSL
7439-95-4
Maqnesium
395 J
9,700
mq/kq
OWR-S D02-061201
15/15
-
9,700
779 J- 1,890 J
NA
NA
NA
No
NUT
7439-96-5
Manqanese
85.6
1,030
mq/kq
OWR-SD04-061201
15/15
-
1,030
186-675
1,800 N
NA
NA
No
BSL
7439-97-6
Mercury
2.8
2.8
mq/kq
OWR-SD06-061201
1/15
o
o
2.8
ND
11 N
NA
NA
No
BSL
7440-02-0
Nickel
3.9 J
3,070
mq/kq
OWR-SD03-061201
14/15
6.3-6.3
3,070
9 J - 19 J
1,500 N
NA
NA
ASL
7440-09-7
Potassium
516 J
2,650 J
mq/kq
OWR-SD 10-061301
15/15
-
2,650
1,550 J-2,660 J
NA
NA
NA
No
NUT
7782-49-2
Selenium
2.4 JK
3.5 L
mq/kq
OWR-S D17-061801
2/15
1 - 1
3.5
ND
390 N
NA
NA
No
BSL
7440-22-4
Silver
0.34 J
0.67 J
mq/kq
OWR-S D02-061201
7/15
2-2
0.67
0.48 J-0.75 J
390 N
NA
NA
No
BSL
7440-62-2
Vanadium
8.4 J
62.2
mq/kq
OWR-SD02-061201
15/15
-
62.2
8.5 J-21.2 J
390 N
NA
NA
No
BSL
7440-66-6
Zinc
28.9
3,980
mq/kq
OWR-SD 15-061401
15/15
-
3,980
27.6-60.9
23,000 N
NA
NA
No
BSL
Footnotes:
1 - Sample and duplicate are considered as two separate samples when determining the minimum and maximum concentrations.
2 - Values presented are sample-specific quantitation limits.
3 - The maximum detected concentration is used for screening purposes.
4 - Background values are present for information purposes only and were not used for COPC selection.
5 - The USEPA Regional Screening Level (May 2018) for residential exposures to soil is presented. Value represents the residential RSL multiplied by a factor of 10 for
anticipated reduced exposures to sediment. Before the factor is applied, the residential RSL for carcinogens corresponds to an incremental cancer risk of 1E-06 and
for noncarcinogens the RSL corresponds to a target hazard quotient of 0.1.
6 - The chemical is selected as a COPC if the maximum detected concentration exceeds the risk-based COPC screening level.
7 - Hexavalent chromium was not detected in any sediment sample, therefore total chromium was evaluated as trivalent chromium.
Shaded criterion indicates that the maximum detected concentration exceeds one or more screening criteria. Shaded chemical name indicates that the
chemical was retained as a COPC.
Definitions:
ARAR/TBC = Applicable or Relevant and Appropriate Requirements To Be Considered
C = Carcinogen
COPC = Chemical Of Potential Concern
J = Estimated value
K = Analyte present. Reported value may be biased high. Actual values is expected to be lower
L = Analyte present. Reported value may be biased low.
mg/kg = milligrams per kilogram
N = Noncarcinogen
NA = Not Applicable/Not Available
ug/kg = micrograms per kilogram
Rationale Codes:
For selection as a COPC:
ASL = Above Screening Level.
For elimination as a COPC:
BSL = Below COPC Screening Level
NUT = Essential nutrient
-------
RAGS Part D Table 3
Medium-Specific Exposure Point Concentration Summary
-------
LIST OF TABLES
RAGS PART D TABLE 3
MEDIUM-SPECIFIC EXPOSURE POINT CONCENTRATION SUMMARY
Table No.
Surface Soil
Combined Surface/Subsurface Soil
Groundwater - Industrial Workers and Residents
Groundwater - Construction Workers
Sediment
3.1.RME
3.2.RME
3.3.RME
3.4.RME
3.5.RME
-------
TABLE 3.1.RME
EXPOSURE POINT CONCENTRATION SUMMARY
REASONABLE MAXIMUM EXPOSURE
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Current
ledium: Surface Soil
xposure Medium: Surface Soil
Exposure Point
Chemical of
Potential Concern
Units
Arithmetic
Mean
95% UCL
(Distribution)
Maximum
Concentration
(Qualifier)
Exposure Point Concentration
Value
Units
Statistic
Rationale
OWR
Benzo(a)pyrene
mg/kg
0.195
0.286 (N)
0.82
0.286
mg/kg
95% KM (t) UCL
ProUCL 5.1.002
Naphthalene
mg/kg
0.672
(1)
9.8
9.8
mg/kg
Maximum Detected Concentration
(1)
Dieldrin
mg/kg
0.008
(1)
0.11
0.11
mg/kg
Maximum Detected Concentration
(1)
Aluminum
mg/kg
10,577
12,000 (N)
16100
12,000
mg/kg
95% Modified-t UCL
ProUCL 5.1.002
Antimony
mg/kg
5.28
11.3 (NP)
37.1 L
11.3
mg/kg
95% KM (Chebyshev) UCL
ProUCL 5.1.002
Arsenic
mg/kg
4.67
5.28 (N)
8.1
5.28
mg/kg
95% Student's-t UCL
ProUCL 5.1.002
Cobalt
mg/kg
6.09
7.59 (G)
14.1
7.59
mg/kg
95% Adjusted Gamma UCL
ProUCL 5.1.002
Copper
mg/kg
257
1,240 (NP)
4,530 J
1,240
mg/kg
95% Chebyshev (Mean, Sd) UCL
ProUCL 5.1.002
Iron
mg/kg
16,329
20,200 (AN)
49,400
20,200
mg/kg
95% Student's-t UCL
ProUCL 5.1.002
Lead
mg/kg
131
484 (NP)
1,650 L
131
mg/kg
Arithmetic Mean Concentration
(2)
Manganese
mg/kg
387
456 (N)
632
456
mg/kg
95% Student's-t UCL
ProUCL 5.1.002
Vanadium
mg/kg
23.4
27.0 (N)
44.6
27.0
mg/kg
95% Student's-t UCL
ProUCL 5.1.002
Zinc
mg/kg
185
705 (NP)
2450
705
mg/kg
95% Chebyshev (Mean, Sd) UCL
ProUCL 5.1.002
Definitions: Qualifiers:
AN = Approximate normal distribution. J = Estimated value.
G = Gamma distribution. L = Analyte present. Reported value may be biased low.
N = Normal distribution.
NP = Non-parametric distribution.
mg/kg = milligrams per kilogram
1 - There are less than three detected concentrations. Reliable statistics cannot be computed. The maximum concentration was used as the EPC.
2 - Mean concentration is used as exposure point concentration for evaluating exposures to lead.
U.S. EPA, 1994:Guidance Manual for the Integrated Exposure Uptake Biokinetic Model for lead in Children.
Exposure point concentrations for the RME scenarios are also the exposure point concentrations for the CTE scenarios.
-------
TABLE 3.2.RME
EXPOSURE POINT CONCENTRATION SUMMARY
REASONABLE MAXIMUM EXPOSURE
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Surface/Subsurface Soil
Exposure Medium: Surface/Subsurface Soil
Exposure Point
Chemical of
Potential Concern
Units
Arithmetic
Mean
95% UCL
(Distribution)
Maximum
Concentration
(Qualifier)
Exposure Point Concentration
Value
Units
Statistic
Rationale
OWR
Benzo(a)pyrene
mg/kg
0.180
0.252 (N)
0.82
0.252
mg/kg
95% KM (t) UCL
ProUCL 5.1.002
Naphthalene
mg/kg
0.425
(1)
9.8
9.8
mg/kg
Maximum Detected Concentration
(1)
Dieldrin
mg/kg
0.005
(1)
0.11
0.11
mg/kg
Maximum Detected Concentration
(1)
Aluminum
mg/kg
8499
9,940 (AN)
21,500
9940
mg/kg
95% Student's-t UCL
ProUCL 5.1.002
Antimony
mg/kg
5.08
6.48 (NP)
37.1 L
6.48
mg/kg
95% KM (Chebyshev) UCL
ProUCL 5.1.002
Arsenic
mg/kg
3.18
3.95 (N)
8.1
3.95
mg/kg
95% KM (t) UCL
95% GROS Adjusted Gamma UCL
ProUCL 5.1.002
Cobalt
mg/kg
5.08
6.32 (G)
17.6
6.32
mg/kg
ProUCL 5.1.002
Copper
mg/kg
141
660 (NP)
4,530 J
660
mg/kg
95% Chebyshev (Mean, Sd) UCL
ProUCL 5.1.002
Iron
mg/kg
16220
19,200 (AN)
49,400
19,200
mg/kg
95% Student's-t UCL
ProUCL 5.1.002
Lead
mg/kg
71.4
260 (L)
1,650 L
71.4
mg/kg
Arithmetic Mean Concentration
(2)
Manganese
mg/kg
232
388 (NP)
632
388
mg/kg
95% KM (Chebyshev) UCL
ProUCL 5.1.002
Thallium
mg/kg
1.47
2 13 (AL)
5.6
2.13
mg/kg
KM Student's t
ProUCL 5.1.002
Vanadium
mg/kg
20.2
23.6 (N)
52.4
23.6
mg/kg
95% Student's-t UCL
ProUCL 5.1.002
Zinc
mg/kg
102
380 (NP)
2,450
380
mg/kg
95% KM (Chebyshev) UCL
ProUCL 5.1.002
Definitions: Qualifiers:
AN = Approximate normal distribution. J = Estimated value.
G = Gamma distribution. L = Analyte present. Reported value may be biased low.
L = Lognormal distribution.
N = Normal distribution.
NP = Non-parametric distribution.
mg/kg = milligrams per kilogram
1 - There are less than three detected concentrations. Reliable statistics cannot be computed. The maximum concentration was used as the EPC.
2 - Mean concentration is used as exposure point concentration for evaluating exposures to lead.
U.S. EPA, 1994:Guidance Manual for the Integrated Exposure Uptake Biokinetic Model for lead in Children.
Exposure point concentrations for the RME scenarios are also the exposure point concentrations for the CTE scenarios.
-------
TABLE 3.3.RME
EXPOSURE POINT CONCENTRATION SUMMARY FOR INDUSTRIAL WORKERS AND RESIDENTS
REASONABLE MAXIMUM EXPOSURE
OLD WILMINGTON ROAD SITE
Scenario timeframe: Current/Future
Medium: Groundwater
Exposure Medium: Groundwater
Exposure Point
Chemical of
Units
Arithmetic
95% UCL
Maximum
Concentration
Exposure Point Concentration
Potential Concern
Mean
(Distribution)
(Qualifier)
Value
Units
Statistic
Rationale
OWR
2-Butanone
ug/L
(D
(1)
1,300
1,300
ug/L
Maximum Detected Concentration
(1)
2-Hexanone
ug/L
(2)
(2)
41
41
ug/L
Maximum Detected Concentration
(2)
Chloroform
ug/L
(2)
(2)
9.4
9.4
ug/L
Maximum Detected Concentration
(2)
cis-1,2-Dichloroethene
ug/L
2.53
1.88 (NP)
6.6
1.88
ug/L
95% KM Chebyshev UCL
ProUCL 5.1.002
Methyl Tert-Butyl Ether
ug/L
(3)
(3)
15
15
ug/L
Maximum Detected Concentration
(3)
Tetrachloroethene
ug/L
35.2
65.7 (G)
190
65.7
ug/L
95% Gamma Adjusted KM-UCL
ProUCL 5.1.002
Trichloroethene
ug/L
6.07
10.6 (AL)
27
10.6
ug/L
95% KM Chebyshev UCL
ProUCL 5.1.002
Vinyl Chloride
ug/L
(2)
(2)
0.57
0.57
ug/L
Maximum Detected Concentration
(2)
1,4-Dioxane
ug/L
3.81
3.84 (G)
20 J
3.84
ug/L
95% KM Adjusted Gamma UCL
ProUCL 5.1.002
Bis(2-ethylhexyl)phthalate
ug/L
(D
(1)
11
11
ug/L
Maximum Detected Concentration
(1)
Caprolactam
ug/L
(2)
(2)
2,800
2,800
ug/L
Maximum Detected Concentration
(2)
Aluminum
ug/L
17,926
57,655 (NP)
301,000
57,655
ug/L
97.5% KM (Chebyshev) UCL
ProUCL 5.1.002
Antimony
ug/L
1.19
1.31 (G)
10.2 J
1.31
ug/L
95% KM Approximate Gamma UCL
ProUCL 5.1.002
Arsenic
ug/L
5.63
12.8 (AL)
60.1
12.8
ug/L
95% KM (Chebyshev) UCL
ProUCL 5.1.002
Barium
ug/L
315
674 (NP)
3,310
674
ug/L
95% KM (Chebyshev) UCL
ProUCL 5.1.002
Beryllium
ug/L
2.42
3.46 (AN)
17.8
3.46
ug/L
95% KM (t) UCL
ProUCL 5.1.002
Cadmium
ug/L
0.554
0.424 (NP)
1.5
0.424
ug/L
95% KM (Chebyshev) UCL
ProUCL 5.1.002
Cobalt
ug/L
19.8
63.9 (L)
232
63.9
ug/L
KM H-UCL
ProUCL 5.1.002
Copper
ug/L
20.4
75.2 (AL)
739
75.2
ug/L
95% KM Chebyshev UCL
ProUCL 5.1.002
Iron
ug/L
15,927
45,400 (L)
380,000 J
45,400
ug/L
95% KM Chebyshev UCL
ProUCL 5.1.002
Lead
ug/L
23.1
53.5 (AL)
217
23.1
ug/L
Arithmetic Mean Concentration
ProUCL 5.1.002
Manganese
ug/L
1,175
2,525 (L)
10,900
2,525
ug/L
95% Chebyshev(Mean, Sd) UCL
ProUCL 5.1.002
Mercury
ug/L
0.122
0.128 (N)
0.23
0.128
ug/L
95% KM (t) UCL
ProUCL 5.1.002
Nickel
ug/L
17.8
51.7 (L)
368
51.7
ug/L
95% KM Chebyshev UCL
ProUCL 5.1.002
Selenium
ug/L
2.88
3.10 (AL)
15.2
3.1
ug/L
95% KM Chebyshev UCL
ProUCL 5.1.002
Thallium
ug/L
0.388
0.539 (AN)
2.3
0.539
ug/L
95% KM (t) UCL
ProUCL 5.1.002
Vanadium
ug/L
7.59
12.3 (AG)
93.6
12.3
ug/L
95% KM Approximate Gamma UCL
ProUCL 5.1.002
Zinc
ug/L
147
378 (NP)
2,020
378
ug/L
95% KM Chebyshev UCL
ProUCL 5.1.002
Definitions: Qualifiers:
AG = Approximate gamma distribution. J = Estimated value.
AL = Approximate lognormal distribution.
AN = Approximate Normal distribution.
G = Gamma distribution.
L = Lognormal distribution.
N = Normal distribution.
NP = Nonparametric distribution.
ug/L = Micrograms per liter.
1 - 2-Butanone, bis(2-ethylhexyl)phthalate, and caprolactam were detected at low frequency of detections and there is no descernable plume for these chemicals, therefore the maximum detected
was used as the EPC for these chemicals.
2 - There were an insufficient number of detected concentrations to calculate an EPC for 2-hexanone, chloroform, and vinyl chloride, therefore the maximum detected concentration was used
as the EPC for these chemicals.
3 - While methyl tert-butyl ether was detected in two thirds of the samples, it is difficult to define a plume area, therefore the maximum detected concentration was used as the EPC
for methyl tert-butyl ether.
Exposure point concentrations for the RME scenarios are also the exposure point concentrations for the CTE scenarios.
-------
TABLE 3.4.RME
EXPOSURE POINT CONCENTRATION SUMMARY FOR CONSTRUCTION WORKERS
REASONABLE MAXIMUM EXPOSURE
OLD WILMINGTON ROAD SITE
[Scenario Timeframe: Current/Future
Medium: Groundwater
[Exposure Medium: Groundwater
Exposure Point
Chemical of
Units
Arithmetic
95% UCL
Maximum
Concentration
Exposure Point Concentration
Potential Concern
Mean
(Distribution)
(Qualifier)
Value
Units
Statistic
Rationale
OWR
2-Butanone
ug/L
(1)
(1)
2 J
2
ug/L
OWR-MW23-PORT1-0117
(1)
cis-1,2-Dichloroethene
ug/L
(1)
(1)
3.1
3.1
ug/L
OWR-MW08S-0117
(1)
Methyl tert-butyl ether
ug/L
(1)
(1)
0.95
0.95
ug/L
OWR-MW23-PORT1-0117
(1)
Trichloroethene
ug/L
(1)
(1)
27
27
ug/L
OWR-MW-08S-0816-RS
(1)
1,4-Dioxane
ug/L
(1)
(1)
3.8 J
3.8
ug/L
OWR-MW08S-0816
(1)
Caprolactam
ug/L
(1)
(1)
3.7 J
3.7
ug/L
OWR-MW23-PORT1-0117
(1)
Aluminum
ug/L
(1)
(1)
114,000
114,000
ug/L
OWR-MW23-PORT2-0816
(1)
Antimony
ug/L
(1)
(1)
0.46 J
0.46
ug/L
OWR-MW23-PORT1-0117
(1)
Arsenic
ug/L
(1)
(1)
60.1
60.1
ug/L
OWR-MW23-PORT2-0117
(1)
Barium
ug/L
(1)
(1)
3,310
3,310
ug/L
OWR-MW23-PORT3-0816
(1)
Beryllium
ug/L
(1)
(1)
17.8
17.8
ug/L
OWR-MW23-PORT2-0117
(1)
Cadmium
ug/L
(1)
(1)
0.45 J
0.45
ug/L
OWR-MW23-PORT2-0117
(1)
Cobalt
ug/L
(1)
(1)
12.2
12.2
ug/L
OWR-MW-08S-0815
(1)
Copper
ug/L
(1)
(1)
39.9
39.9
ug/L
OWR-MW23-PORT2-0117
(1)
Iron
ug/L
(1)
(1)
74,900 J
74,900
ug/L
OWR-MW23-PORT2-0117
(1)
Lead
ug/L
(1)
(1)
206
206
ug/L
OWR-MW23-PORT2-0117
(1)
Manganese
ug/L
(1)
(1)
1,020 J
1,020
ug/L
OWR-MW23-PORT2-0117
(1)
Mercury
ug/L
(1)
(1)
0.091 J
0.091
ug/L
OWR-MW23-PORT2-0117
(1)
Nickel
ug/L
(1)
(1)
15.8
15.8
ug/L
OWR-MW23-PORT2-0117
(1)
Selenium
ug/L
(1)
(1)
1.6 J
1.6
ug/L
OWR-MW23-PORT2-0816
(1)
Thallium
ug/L
(1)
(1)
2.3
2.3
ug/L
OWR-MW23-PORT2-0117
(1)
Vanadium
ug/L
(1)
(1)
30.5 J
30.5
ug/L
OWR-MW23-PORT2-0117
(1)
Zinc
ug/L
(1)
(1)
343
343
ug/L
OWR-MW23-PORT2-0117
(1)
1 - The maximum groundwater concentration at monitoring wells OWR-MW08S, OWR-MW08D, and OWR-MW23 is used as the exposure point concentration for construction workers.
Exposure point concentrations for the RME scenarios are also the exposure point concentrations for the CTE scenarios.
-------
TABLE 3.5.RME
EXPOSURE POINT CONCENTRATION SUMMARY
REASONABLE MAXIMUM EXPOSURE
OLD WILMINGTON ROAD SITE
[Scenario Timeframe: Current/Future
Medium: Sediment
[Exposure Medium: Sediment
Exposure Point
Chemical of
Potential Concern
Units
Arithmetic
Mean
95% UCL
(Distribution)
Maximum
Concentration
(Qualifier)
Exposure Point Concentration
Value
Units
Statistic
Rationale
OWR
Cobalt
mg/kg
10.2
14.0 (AN)
34 J
14.0
mg/kg
95% Student's-t UCL
ProUCL 5.1.002
Nickel
mg/kg
218
1,500 (NP)
3,070
1,500
mg/kg
97.5% KM (Chebyshev) UCL
ProUCL 5.1.002
Definitions: Qualifiers:
AN = Approximate Normal J = Estimated value
L = Lognormal
NP= Non-pa ra metric
mg/kg = milligrams per kilogram
Exposure point concentrations for the RME scenarios are also the exposure point concentrations for the CTE scenarios.
-------
RAGS Part D Table 4
Values Used For Daily Intake Calculations
-------
LIST OF TABLES
RAGS PART D TABLE 4
VALUES USED FOR DAILY INTAKE CALCULATIONS
Table No.
Reasonable Maximum Exposures
4.1 .RME Construction Workers Exposed to Soil
4.2.RME Construction Workers Exposed to Air Emissions from Soil
4.3.RME Construction Workers Exposed to Groundwater
4.4.RME Construction Workers Exposed to Volatile Emissions from Groundwater
4.5.RME Industrial Workers Exposed to Soil
4.6.RME Industrial Workers Exposed to Air Emissions from Soil
4.7.RME Indistrial Workers Exposed to Groundwater
4.8.RME Industrial Workers Exposed to Volatiles While Showering
4.9.RME Child Residents Exposed to Soil
4.10.RME Child Residents Exposed to Air Emissions from Soil
4.11 RME Child Residents Exposed to Groundwater
4.12.RME Child Residents Exposed to Sediment
4.13.RME Adult Residents Exposed to Soil
4.14.RME Adult Residents Exposed to Air Emissions from Soil
4.15.RME Adult Residents Exposed to Groundwater
4.16.RME Adult Residents Exposed to Volatiles While Showering
4.17.RME Adult Residents Exposed to Sediment
Central Tendency Exposures
4.1 .CTE Construction Workers Exposed to Soil
4.2.CTE Construction Workers Exposed to Air Emissions from Soil
4.3.CTE Construction Workers Exposed to Groundwater
4.4.CTE Construction Workers Exposed to Volatile Emissions from Groundwater
4.5.CTE Industrial Workers Exposed to Soil
4.6.CTE Industrial Workers Exposed to Air Emissions from Soil
4.7.CTE Indistrial Workers Exposed to Groundwater
4.8.CTE Industrial Workers Exposed to Volatiles While Showering
4.9.CTE Child Residents Exposed to Soil
4.10.CTE Child Residents Exposed to Air Emissions from Soil
4.11 .CTE Child Residents Exposed to Groundwater
4.12.CTE Child Residents Exposed to Sediment
4.13.CTE Adult Residents Exposed to Soil
4.14.CTE Adult Residents Exposed to Air Emissions from Soil
4.15.CTE Adult Residents Exposed to Groundwater
4.16.CTE Adult Residents Exposed to Volatiles While Showering
4.17.CTE Adult Residents Exposed to Sediment
-------
TABLE 4.1.RME
VALUES USED FOR DAILY INTAKE CALCULATIONS
REASONABLE MAXIMUM EXPOSURE - CONSTRUCTION WORKERS- SOILS
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Surface Soil/Subsurface Soil
Exposure Medium: Surface/Subsurface Soil
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Parameter Definition
Value
Units
Rationale/
Intake Equation/
Code
Reference
Model Name
Ingestion
Construction Workers
Adult
Old Wilmington Road
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002a
Intake (mg/kg/day) =
IR-S
Ingestion Rate
330
mg/day
USEPA, 2002b
RBA
Relative Bioavailability
Chemical Specific
unitless
USEPA, 1989
Cs x RBA x IRS x CF3 x Fl x EF x ED
CF3
Conversion Factor 3
1.0E-06
kg/mg
-
BWx AT
Fl
Fraction Ingested
1
unitless
USEPA, 2002b
EF
Exposure Frequency
250
days/year
(1)
ED
Exposure Duration
1
years
(1)
BW
Body Weight
80
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
365
days
USEPA, 2014
Dermal
Construction Workers
Adult
Old Wilmington Road
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002a
Dermally Absorbed Dose (mg/kg/day) =
CF3
Conversion Factor 3
1.0E-06
kg/mg
-
SA
Skin Surface Available for Contact
3,527
cm2
USEPA, 2014
CS x CF3 x SA x SSAF x DABS x EV x EF x ED
SSAF
Soil to Skin Adherence Factor
0.3
mg/cm2/event
USEPA, 2002b
BW xAT
DABS
Absorption Factor
Chemical Specific
unitless
USEPA, 2004
EV
Events Frequency
1
events/day
USEPA, 2004
EF
Exposure Frequency
250
days/year
(1)
ED
Exposure Duration
1
years
(1)
BW
Body Weight
80
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
365
days
USEPA, 2014
Notes:
1 - Professional judgment.
Sources:
USEPA, 1989: Risk Assessment Guidance for Superfund. Vol 1: Human Health Evaluation Manual, Part A.
USEPA, 2002a:Calculating Upper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Sites. OSWER 9285.6-10, December.
USEPA, 2002b: Supplemental Guidance for Developing Soil Screening Levels for Superfund Sites. OSWER 9355.4-24.
USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
-------
TABLE 4.2.RME
VALUES USED FOR DAILY INTAKE CALCULATIONS
REASONABLE MAXIMUM EXPOSURE - CONSTRUCTION WORKERS - SOILS TO AIR
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Surface Soil/Subsurface Soil
Exposure Medium: Air
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Code
Parameter Definition
Value
Units
Rationale/
Reference
Intake Equation/
Model Name
Inhalation
Construction Workers
Adult
Old Wilmington Road
CA
Chemical concentration in air
Calculated
mg/m3
USEPA, 2002a
Exposure Concentration (mg/m3) =
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002b
ET
Exposure Time
8
hours/day
(1)
CAx ET x EF x ED
EF
Exposure Frequency
250
days/year
(1)
AT x 24 hours/day
ED
Exposure Duration
1
years
(1)
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
CA= (1/PEF + 1 /VF) x Cs
AT-N
Averaging Time (Non-Cancer)
365
days
USEPA, 2014
PEF
Particulate Emission Factor
1.40E+06
m3/kg
USEPA, 2002a
VF
Volatilization Factor
Chemical-specific
m3/kg
USEPA, 2002a
Q/C
Inverse of mean concentration at
14.31
g/m2-s per
USEPA, 2002a
center of source
kg/m3
Notes:
1 - Professional judgment.
Sources:
USEPA, 2002a: Supplemental Guidance for Developing Soil Screening Levels for Superfund Sites. OSWER 9355.4-24.
USEPA, 2002b:Calculating Upper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Sites. OSWER 9285.6-10, December.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
-------
TABLE 4.3.RME
VALUES USED FOR DAILY INTAKE CALCULATIONS
REASONABLE MAXIMUM EXPOSURE - CONSTRUCTION WORKERS - GROUNDWATER
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Groundwater
Exposure Medium: Groundwater
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Parameter Definition
Value
Units
Rationale/
Intake Equation/
Code
Reference
Model Name
Ingestion
Construction Workers
Adult
Old Wilmington Road
CGW
Chemical Concentration in Groundwater
Max or 95% UCL
ug/L
USEPA, 2014a
Chronic Daily Intake (CDI) (mg/kg/day) =
CF
Conversion Factor
0.001
mg/ug
-
IR-GW
Ingestion Rate of Groundwater
0.05
L/day
(1)
CGW x CF x IR-GW x EF x ED
EF
Exposure Frequency
30
days/year
(1)
BWx AT
ED
Exposure Duration
1
years
(1)
BW
Body Weight
80
kg
USEPA, 2014b
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014b
AT-N
Averaging Time (Non-Cancer)
365
days
USEPA, 2014b
Dermal
Construction Workers
Adult
Old Wilmington Road
Daevent
Dermally Absorbed Dose per Event
Calculated
mg/cm2-event
USEPA, 2004
Dermally Absorbed Dose (mg/kg/day) =
Cw
Chemical Concentration in Groundwater
Max or 95% UCL
ug/L
USEPA, 2014a
FA
Fraction Absorbed
Chemical Specific
unitless
USEPA, 2004
DAevent x EV x EF x ED x SA
CF
Conversion factor
0.001
L/cm3
--
BWx AT
Kp
Permeability coefficient
Chemical Specific
cm/hr
USEPA, 2004
T
Lag time
Chemical Specific
hr/event
USEPA, 2004
For inorganics
t*
Time it takes to reach steady state
Chemical Specific
hr/event
USEPA, 2004
DAevent = Kp x CW x CF x tevent
tevent
Duration of event
8
hr/event
(1)
B
Bunge model constant
Chemical Specific
unitless
USEPA, 2004
For organics if tevent <= t*
SA
Skin Surface Available for Contact
3,527
cm2
USEPA, 2014b
DAevent= 2 x FA x Kp x Cw x CF x sqrt[(6 x x x teventypi]
EV
Event Frequency
1
events/day
(1)
EF
Exposure Frequency
30
days/year
(1)
For organics if tevent > t*
ED
Exposure Duration
1
years
(1)
DAevent =FAx Kpx Cwx CFx [tevent/(1+B) +
BW
Body Weight
80
kg
USEPA, 2014b
2 x t +(1 + 3B + 3B2)/(1+B2)
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014b
AT-N
Averaging Time (Non-Cancer)
365
days
USEPA, 2014b
Notes:
1 - Professional judgment.
USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
USEPA, 2014a: Determining Groundwater Exposure Point Concentrations. OSWER 9283.1-42
USEPA, 2014b: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
-------
TABLE 4.4.RME
VALUES USED FOR DAILY INTAKE CALCULATIONS
REASONABLE MAXIMUM EXPOSURE - CONSTRUCTION WORKERS - GROUNDWATER TO AIR
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Groundwater
Exposure Medium: Air
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Parameter Definition
Value
Units
Rationale/
Intake Equation/
Code
Reference
Model Name
Inhalation
Construction Workers
Adult
Old Wilmington Road
CA
Chemical concentration in air
Calculated
mg/m3
VDEQ, 2018
Exposure Concentration (mg/m3) =
CW
Chemical concentration in water.
Max or 95% UCL
ug/L
USEPA, 2014a
CF
Conversion Factor
0.001
mg/ug
-
CA x ET x EF x ED
ET
Exposure Time
8
hours/day
(1)
AT x 24 hours/day
EF
Exposure Frequency
30
days/year
(1)
ED
Exposure Duration
1
years
(1)
CA = CW x CF x VF
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014b
AT-N
Averaging Time (Non-Cancer)
365
days
USEPA, 2014b
VF
Volatilization Factor
Calculated
(mg/m3)/(mg/L)
VDEQ, 2018
Notes:
1 - Professional judgment.
USEPA, 2014a: Determining Groundwater Exposure Point Concentrations. OSWER 9283.1-42
USEPA, 2014b: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
VDEQ, 2018: Virginia Unified Risk Assessment Model - VURAM 2.0 User's Guide.
-------
TABLE 4.5.RME
VALUES USED FOR DAILY INTAKE CALCULATIONS
REASONABLE MAXIMUM EXPOSURE - INDUSTRIAL WORKERS - SOIL
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Current/Future
Medium: Surface Soil/Subsurface Soil
Exposure Medium: Surface/Subsurface Soil
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Parameter Definition
Value
Units
Rationale/
Intake Equation/
Code
Reference
Model Name
Ingestion
Industrial Workers
Adult
Old Wilmington Road
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002
Intake (mg/kg/day) =
IR-S
Ingestion Rate
100
mg/day
USEPA, 2014
RBA
Relative Bioavailability
Chemical Specific
unitless
USEPA, 1989
Cs x RBA x IRS x CF3 x Fl x EF x ED
CF3
Conversion Factor 3
1.0E-06
kg/mg
-
BWx AT
Fl
Fraction Ingested
1
unitless
USEPA, 2014
EF
Exposure Frequency
250
days/year
USEPA, 2014
ED
Exposure Duration
25
years
USEPA, 2014
BW
Body Weight
80
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
9,125
days
USEPA, 2014
Dermal
Industrial Workers
Adult
Old Wilmington Road
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002
Dermally Absorbed Dose (mg/kg/day) =
CF3
Conversion Factor 3
1.0E-06
kg/mg
-
SA
Skin Surface Available for Contact
3,527
cm2
USEPA, 2014
CS x CF3 x SA x SSAF x DABS x EV x EF x ED
SSAF
Soil to Skin Adherence Factor
0.12
mg/cm2/event
USEPA, 2014
BWx AT
DABS
Absorption Factor
Chemical Specific
unitless
USEPA, 2004
EV
Events Frequency
1
events/day
USEPA, 2004
EF
Exposure Frequency
250
days/year
USEPA, 2014
ED
Exposure Duration
25
years
USEPA, 2014
BW
Body Weight
80
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
9,125
days
USEPA, 2014
Sources:
USEPA, 1989: Risk Assessment Guidance for Superfund. Vol 1: Human Health Evaluation Manual, Part A.
USEPA, 2002:Calculating Upper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Sites. OSWER 9285.6-10, December.
USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
-------
TABLE 4.6.RME
VALUES USED FOR DAILY INTAKE CALCULATIONS
REASONABLE MAXIMUM EXPOSURE - INDUSTRIAL WORKERS - SOIL TO AIR
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Current/Future
Medium: Surface Soil/Subsurface Soil
Exposure Medium: Air
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Code
Parameter Definition
Value
Units
Rationale/
Reference
Intake Equation/
Model Name
Inhalation
Industrial Workers
Adult
Old Wilmington Road
CA
Chemical concentration in air
Calculated
mg/m3
USEPA, 2002a
Exposure Concentration (mg/m3) =
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002b
ET
Exposure Time
8
hours/day
USEPA, 2014
CAx ET x EF x ED
EF
Exposure Frequency
250
days/year
USEPA, 2014
AT x 24 hours/day
ED
Exposure Duration
25
years
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
CA= (1/PEF + 1 /VF) x Cs
AT-N
Averaging Time (Non-Cancer)
9,125
days
USEPA, 2014
PEF
Particulate Emission Factor
3.24E+09
m3/kg
USEPA, 1996, 2018
VF
Volatilization Factor
Chemical-specific
m3/kg
USEPA, 2002a
Q/C
Inverse of mean concentration at
87.36898
g/m2-s per
USEPA, 1996, 2018
center of source
kg/m3
Sources:
USEPA, 1996: Soil Screening Level Guidance: Technical Background Document.
USEPA, 2002a: Supplemental Guidance for Developing Soil Screening Levels for Superfund Sites. OSWER 9355.4-24.
USEPA, 2002b:Calculating Upper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Sites. OSWER 9285.6-10, December.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
USEPA, 2018: USEPA Regional Screening Level Calculator at http://epa-prgs.ornl.gov/cgi-bin/chemicals/csl_search. Site-specific values for Philadelphia, PA.
-------
TABLE 4.7.RME
VALUES USED FOR DAILY INTAKE CALCULATIONS
REASONABLE MAXIMUM EXPOSURE - INDUSTRIAL WORKERS - GROUNDWATER
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Groundwater
Exposure Medium: Groundwater
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Code
Parameter Definition
Value
Units
Rationale/
Reference
Intake Equation/
Model Name
Ingestion
Industrial Workers
Adult
Old Wilmington Road
CGW
CF
Chemical Concentration in Groundwater
Conversion Factor
Max or 95% UCL
0.001
ug/L
mg/ug
USEPA, 2014a
Chronic Daily Intake (CDI) (mg/kg/day) =
IR-GW
Ingestion Rate of Groundwater
1.25
L/day
(1)
CGW x CF x IR-GW x EF x ED
EF
Exposure Frequency
250
days/year
USEPA, 2014b
BWx AT
ED
Exposure Duration
25
years
USEPA, 2014b
BW
Body Weight
80
kg
USEPA, 2014b
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014b
AT-N
Averaging Time (Non-Cancer)
9,125
days
USEPA, 2014b
Dermal
Industrial Workers
Adult
Old Wilmington Road
Daevent
Cw
Dermally Absorbed Dose per Event
Chemical Concentration in Groundwater
Calculated
Max or 95% UCL
mg/cm2-event
ug/L
USEPA, 2004
USEPA, 2014a
Dermally Absorbed Dose (mg/kg/day) =
FA
Fraction Absorbed
Chemical Specific
unitless
USEPA, 2004
DAevent x EVx EF x ED x SA
CF
Conversion factor
0.001
L/cm3
BWx AT
Kp
Permeability coefficient
Chemical Specific
cm/hr
USEPA, 2004
X
Lag time
Chemical Specific
hr/event
USEPA, 2004
For inorganics
t*
Time it takes to reach steady state
Chemical Specific
hr/event
USEPA, 2004
DAevent = Kp x CW x CF x tevent
tevent
Duration of event
0.25
hr/event
(2)
B
Bunge model constant
Chemical Specific
unitless
USEPA, 2004
For organics if tevent <= t*
SA
Skin Surface Available for Contact
3,527
cm2
USEPA, 2014b
DAevent = 2 x FA x Kp x Cw x CF x sqrt[(6 xix tevent)/pi]
EV
Event Frequency
1
events/day
(2)
EF
Exposure Frequency
250
days/year
USEPA, 2014b
For organics if tevent > t*
ED
Exposure Duration
25
years
USEPA, 2014b
DAevent = FA x Kp x Cw x CF x [tevent/(1 +B) +
BW
Body Weight
80
kg
USEPA, 2014b
2n x (1 + 3B+ 3B2)/(1 + B2)]
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014b
AT-N
Averaging Time (Non-Cancer)
9,125
days
USEPA, 2014b
Notes
1 - USEPA, 2014: Frequently Asked Questions (FAQs) About Update of Standard Default Exposure Factors.
2 - Professional judgment.
USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
USEPA, 2014a: Determining Groundwater Exposure Point Concentrations. OSWER 9283.1-42
USEPA, 2014b: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
-------
TABLE 4.8.RME
VALUES USED FOR DAILY INTAKE CALCULATIONS
REASONABLE MAXIMUM EXPOSURE - ADULT RESIDENTS - INHALATION OF VOLATILES FROM GROUNDWATER
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Groundwater
Exposure Medium: Air
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Parameter Definition
Value
Units
Rationale/
Intake Equation/
Code
Reference
Model Name
Inhalation
Industrial Workers
Adult
Old Wilmington Road
S
Volatile Chemical Generation Rate
Derived
mg/m3-min-shower
Foster&Chrostowski 1987
Exposure Concentration (mg/m3)=
K
Mass Transfer Coefficient
Derived
min
Foster&Chrostowski 1987
EF
Exposure Frequency
250
days/year
USEPA, 2014
Sx Kx EFx ED
ED
Exposure Duration
25
years
USEPA, 2014
AT x Ra x CF
Ra
Air Exchange Rate
0.017
min"1
Foster&Chrostowski 1987
CF
Conversion Factor
1,440
min/day
-
K = Ds + exof-Ra x Dt") - exofRa x CDs - Dt)l
Ds
Shower Duration
10
min
(1)
Ra
Dt
Total Time in Bathroom
15
min
(1)
Fr
Shower Water Flow Rate
10
L/min
Foster&Chrostowski 1987
Sv
Shower Room Air Volume
6
m3
Foster&Chrostowski 1987
ts
Shower Dropler Drop Time
2
sec
Foster&Chrostowski 1987
d
Shower Droplet Diameter
1
mm
Foster&Chrostowski 1987
T1
Calibration WaterTemperature
293
K
Foster&Chrostowski 1987
Ts
Shower Water Temperature
318
K
Foster&Chrostowski 1987
ml
Water Viscosity at T1
1.002
cp
Foster&Chrostowski 1987
ms
Water Viscosity at Ts
0.596
cp
Foster&Chrostowski 1987
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Noncancer)
9,125
days
USEPA, 2014
Notes:
1 - Professional judgment.
Sources:
USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
Foster, S.A. and P.C. Chrostowski, 1987. Inhalation Exposure to Volatile Organic Contaminants in the Shower.
-------
TABLE 4.9.RME
VALUES USED FOR DAILY INTAKE CALCULATIONS
REASONABLE MAXIMUM EXPOSURE - CHILD RESIDENTS - SOILS
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Surface Soil/Subsurface Soil
sure Medium: Surface/Subsurface Soil
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Parameter Definition
Value
Units
Rationale/
Intake Equation/
Code
Reference
Model Name
Ingestion
Resident
Child
Old Wilmington Road
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002
Intake (mg/kg/day) =
IR-S
Ingestion Rate
200
mg/day
USEPA, 2014
RBA
Relative Bioavailability
Chemical Specific
unitless
USEPA, 1989
Cs x RBA x IRS x CF3 x Fl x EF x ED
CF3
Conversion Factor 3
1.0E-06
kg/mg
-
BWx AT
Fl
Fraction Ingested
1
unitless
USEPA, 2014
EF
Exposure Frequency
350
days/year
USEPA, 2014
ED1
Exposure Duration (Age 0-2)
2
years
(1), USEPA, 2005, 2014
ED2
Exposure Duration (Age 2-6)
4
years
(1), USEPA, 2005, 2014
BW
Body Weight
15
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
2,190
days
USEPA, 2014
Dermal
Resident
Child
Old Wilmington Road
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002
Dermally Absorbed Dose (mg/kg/day) =
CF3
Conversion Factor 3
1E-06
kg/mg
-
SA
Skin Surface Available for Contact
2,373
cm2
USEPA, 2014
CS x CF3 x SA x SSAF x DABS x EV x EF x ED
SSAF
Soil to Skin Adherence Factor
0.2
mg/cm2/event
USEPA, 2014
BWx AT
DABS
Absorption Factor
Chemical Specific
unitless
USEPA, 2004
EV
Events Frequency
1
events/day
USEPA, 2004
EF
Exposure Frequency
350
days/year
USEPA, 2014
ED1
Exposure Duration (Age 0-2)
2
years
(1), USEPA, 2005, 2014
ED2
Exposure Duration (Age 2-6)
4
years
(1), USEPA, 2005, 2014
BW
Body Weight
15
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
2,190
days
USEPA, 2014
Notes:
1 - Children will be evaluated as one age group (0-6 years) for non-mutagenic chemicals. For chemicals that act via the mutagenic mode of action, residential children will be evaluated as two age groups, 0-2 years and 2-6 years in accordance
with USEPA's Supplemental Guidance of Assessing Susceptibility from Early-Life Exposure to Carcinogens (USEPA, 2005).
Sources:
USEPA, 1989: Risk Assessment Guidance for Superfund. Vol 1: Human Health Evaluation Manual, Part A. EPA/540/1-86/060.
USEPA, 2002:Calculating Upper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Sites. OSWER 9285.6-10, December.
USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
-------
TABLE 4.10.RME
VALUES USED FOR DAILY INTAKE CALCULATIONS
REASONABLE MAXIMUM EXPOSURE - CHILD RESIDENTS SOILS TO AIR
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Surface Soil/Subsurface Soil
Exposure Medium: Air
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Code
Parameter Definition
Value
Units
Rationale/
Reference
Intake Equation/
Model Name
Inhalation
Resident
Child
Old Wilmington Road
CA
Chemical concentration in air
Calculated
mg/m3
USEPA, 2002a
Exposure Concentration (mg/m3) =
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002b
ET
Exposure Time
24
hours/day
USEPA, 2014
CA x ET x EF x ED
EF
Exposure Frequency
350
days/year
USEPA, 2014
AT x 24 hours/day
ED1
Exposure Duration (Age 0 - 2)
2
years
(1), USEPA, 2005, 2014
ED2
Exposure Duration (Age 2 - 6)
4
years
(1), USEPA, 2005, 2014
CA = (1 /PEF + 1 /VF) x Cs
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
2,190
days
USEPA, 2014
PEF
Particulate Emission Factor
3.24E+09
m3/kg
USEPA, 1996, 2018
VF
Volatilization Factor
Chemical-specific
m3/kg
USEPA, 2002a
Q/C
Inverse of mean concentration at
87.36898
g/m2-s per
USEPA, 1996, 2018
center of source
kg/m3
Notes:
1 - Children will be evaluated as one age group (0 - 6 years) for non-mutagenic chemicals. For chemicals that act via the mutagenic mode of action, residential children will be evaluated as two age groups, 0 - 2 years and 2 - 6 years in accordance
with USEPA's Supplemental Guidance of Assessing Susceptibility from Early-Life Exposure to Carcinogens (USEPA, 2005).
Sources:
USEPA, 1996: Soil Screening Level Guidance: Technical Background Document.
USEPA, 2002a: Supplemental Guidance for Developing Soil Screening Levels for Superfund Sites. OSWER 9355.4-24.
USEPA, 2002b: Calculating Upper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Sites. OSWER 9285.6-10, December.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
USEPA, 2018: USEPA Regional Screening Level Calculator at http://epa-prgs.ornl.gov/cgi-bin/chemicals/csl_search. Site-specific values for Philadelphia, PA.
-------
TABLE 4.11 .RME
VALUES USED FOR DAILY INTAKE CALCULATIONS
REASONABLE MAXIMUM EXPOSURE - CHILD RESIDENTS - GROUNDWATER
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Groundwater
Exposure Medium: Groundwater
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Parameter Definition
Value
Units
Rationale/
Intake Equation/
Code
Reference
Model Name
Ingestion
Residents
Child
Old Wilmington Road
CGW
Chemical Concentration in Groundwater
Max or 95% UCL
ug/L
USEPA, 2014a
Chronic Daily Intake (CDI) (mg/kg/day) =
CF
Conversion Factor
0.001
mg/ug
IR-GW
Ingestion Rate of Groundwater
0.78
L/day
USEPA, 2014b
CGW x CF x IR-GW x EF x ED
EF
Exposure Frequency
350
days/year
USEPA, 2014b
BWx AT
ED1
Exposure Duration (Age 0 - 2)
2
years
(1), USEPA, 2005, 2014b
ED2
Exposure Duration (Age 2 - 6)
4
years
(1), USEPA, 2005, 2014b
BW
Body Weight
15
kg
USEPA, 2014b
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014b
AT-N
Averaging Time (Non-Cancer)
2,190
days
USEPA, 2014b
Dermal
Residents
Child
Old Wilmington Road
Daevent
Dermally Absorbed Dose per Event
Calculated
mg/cm2-event
USEPA, 2004
Dermally Absorbed Dose (mg/kg/day) =
Cw
Chemical Concentration in Groundwater
Max or 95% UCL
ug/L
USEPA, 2014a
FA
Fraction Absorbed
Chemical Specific
unitless
USEPA, 2004
DAevent x EV x EF x ED x SA
CF
Conversion factor
0.001
L/cm3
BWx AT
Kp
Permeability coefficient
Chemical Specific
cm/hr
USEPA, 2004
X
Lag time
Chemical Specific
hr/event
USEPA, 2004
For inorganics
t*
Time it takes to reach steady state
Chemical Specific
hr/event
USEPA, 2004
DAevent = Kp x CW x CF x tevent
tevent
Duration of event
0.54
hr/event
USEPA, 2014b
B
Bunge model constant
Chemical Specific
unitless
USEPA, 2004
For organics if tevent <= t*
SA
Skin Surface Available for Contact
6,365
cm2
USEPA, 2014b
DAevent = 2 x FA x Kp x Cw x CF x sqrt[(6 xix tevent)/pi]
EV
Event Frequency
1
events/day
USEPA, 2004
EF
Exposure Frequency
350
days/year
USEPA, 2014b
For organics if tevent > t*
ED1
Exposure Duration (Age 0 - 2)
2
years
(1), USEPA, 2005, 2014b
DAevent = FA x Kp x Cw x CF x [tevent/(1 +B) +
ED2
Exposure Duration (Age 2 - 6)
4
years
(1), USEPA, 2005, 2014b
2xtx(1 + 3B + 3B2)/(1 + B2)]
BW
Body Weight
15
kg
USEPA, 2014b
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014b
AT-N
Averaging Time (Non-Cancer)
2,190
days
USEPA, 2014b
Notes:
1 - Children will be evaluated as one age group (0 - 6 years) for non-mutagenic chemicals. For chemicals that act via the mutagenic mode of action, residential children will be evaluated as two age groups, 0 - 2 years and 2 - 6 years in accordance
with USEPA's Supplemental Guidance of Assessing Susceptibility from Early-Life Exposure to Carcinogens (USEPA, 2005).
Sources:
USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
USEPA, 2014a: Determining Groundwater Exposure Point Concentrations. OSWER 9283.1-42
USEPA, 2014b: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
-------
TABLE 4.12.RME
VALUES USED FOR DAILY INTAKE CALCULATIONS
REASONABLE MAXIMUM EXPOSURE - CHILD RESIDENTS - SEDIMENT
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Current/Future
Medium: Sediment
Exposure Medium: Sediment
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Parameter Definition
Value
Units
Rationale/
Intake Equation/
Code
Reference
Model Name
Ingestion
Resident
Child
Old Wilmington Road
CS
Chemical concentration in sediment
Max or 95% UCL
mg/kg
USEPA, 2002
Intake (mg/kg/day) =
IR-S
Ingestion Rate
200
mg/day
USEPA, 2014
RBA
Relative Bioavailability
Chemical Specific
unitless
USEPA, 1989
Cs x RBA x IRS x CF3 x Fl x EF x ED
CF3
Conversion Factor 3
1.0E-06
kg/mg
-
BWx AT
Fl
Fraction Ingested
1
unitless
(1)
EF
Exposure Frequency
52
days/year
(1)
ED1
Exposure Duration (Age 0-2)
2
years
(2), USEPA, 2005, 2014
ED2
Exposure Duration (Age 2-6)
4
years
(2), USEPA, 2005, 2014
BW
Body Weight
15
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
2,190
days
USEPA, 2014
Dermal
Resident
Child
Old Wilmington Road
CS
Chemical concentration in sediment
Max or 95% UCL
mg/kg
USEPA, 2002
Dermally Absorbed Dose (mg/kg/day) =
CF3
Conversion Factor 3
1.0E-06
kg/mg
-
SA
Skin Surface Available for Contact
2,373
cm2
USEPA, 2014
CS x CF3 x SA x SSAF x DABS x EV x EF x ED
SSAF
Soil to Skin Adherence Factor
0.2
mg/cm2/event
USEPA, 2014
BWx AT
DABS
Absorption Factor
Chemical Specific
unitless
USEPA, 2004
EV
Events Frequency
1
events/day
USEPA, 2004
EF
Exposure Frequency
52
days/year
(1)
ED1
Exposure Duration (Age 0-2)
2
years
(2), USEPA, 2005, 2014
ED2
Exposure Duration (Age 2-6)
4
years
(2), USEPA, 2005, 2014
BW
Body Weight
15
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
2,190
days
USEPA, 2014
Notes:
1 - Professional judgment. Assume two days a week in warm weather months for RME and one day a weekfor CTE.
2 - Children will be evaluated as one age group (0-6 years) for non-mutagenic chemicals. For chemicals that act via the mutagenic mode of action, children residents will be evaluated as two age groups, 0-2 years and 2-6 years in accordance
with USEPA's Supplemental Guidance of Assessing Susceptibility from Early-Life Exposure to Carcinogens (USEPA, 2005).
Sources:
USEPA, 1989: Risk Assessment Guidance for Superfund. Vol 1: Human Health Evaluation Manual, Part A. EPA/540/1-86/060.
USEPA, 2002: Calculating Upper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Sites. OSWER 9285.6-10, December.
USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
-------
TABLE 4.13.RME
VALUES USED FOR DAILY INTAKE CALCULATIONS
REASONABLE MAXIMUM EXPOSURE - ADULT RESIDENTS - SOILS
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Surface Soil/Subsurface Soil
sure Medium: Surface/Subsurface Soil
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Parameter Definition
Value
Units
Rationale/
Intake Equation/
Code
Reference
Model Name
Ingestion
Resident
Adult
Old Wilmington Road
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002
Intake (mg/kg/day) =
IR-S
Ingestion Rate
100
mg/day
USEPA, 2014
RBA
Relative Bioavailability
Chemical Specific
unitless
USEPA, 1989
Cs x RBA x IRS x CF3 x Fl x EF x ED
CF3
Conversion Factor 3
1.0E-06
kg/mg
-
BWx AT
Fl
Fraction Ingested
1
unitless
USEPA, 1989
EF
Exposure Frequency
350
days/year
USEPA, 2014
ED1
Exposure Duration (Age 6 - 16)
10
years
(1), USEPA, 2005, 2014)
ED2
Exposure Duration (Age 16 - 26)
10
years
(1), USEPA, 2005, 2014)
BW
Body Weight
80
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
7,300
days
USEPA, 2014
Dermal
Resident
Adult
Old Wilmington Road
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002
Dermally Absorbed Dose (mg/kg/day) =
CF3
Conversion Factor 3
1.0E-06
kg/mg
-
SA
Skin Surface Available for Contact
6,032
cm2
USEPA, 2014
CS x CF3 x SA x SSAF x DABS x EV x EF x ED
SSAF
Soil to Skin Adherence Factor
0.07
mg/cm2/event
USEPA, 2014
BWx AT
DABS
Absorption Factor
Chemical Specific
unitless
USEPA, 2004
EV
Events Frequency
1
events/day
USEPA, 2004
EF
Exposure Frequency
350
days/year
USEPA, 2014
ED1
Exposure Duration (Age 6 - 16)
10
years
(1), USEPA, 2005, 2014)
ED2
Exposure Duration (Age 16 - 26)
10
years
(1), USEPA, 2005, 2014)
BW
Body Weight
80
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
7,300
days
USEPA, 2014
Notes:
1 - Adults will be evaluated as one age group (7 - 26 years) for non-mutagenic chemicals. For chemicals that act via the mutagenic mode of action, adults will be evaluated as two age groups, 7-16 years and 16-26 years in accordance
with USEPA's Supplemental Guidance of Assessing Susceptibility from Early-Life Exposure to Carcinogens (USEPA, 2005).
Sources:
USEPA, 1989: Risk Assessment Guidance for Superfund. Vol 1: Human Health Evaluation Manual, Part A.
USEPA, 2002:Calculating Upper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Sites. OSWER 9285.6-10, December.
USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
-------
TABLE 4.14.RME
VALUES USED FOR DAILY INTAKE CALCULATIONS
REASONABLE MAXIMUM EXPOSURE - ADULT RESIDENTS - SOILS TO AIR
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Surface Soil/Subsurface Soil
Exposure Medium: Air
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Code
Parameter Definition
Value
Units
Rationale/
Reference
Intake Equation/
Model Name
Inhalation
Resident
Adult
Old Wilmington Road
CA
Chemical concentration in air
Calculated
mg/m3
USEPA, 2002a
Exposure Concentration (mg/m3) =
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002b
ET
Exposure Time
24
hours/day
USEPA, 2014
CA x ET x EF x ED
EF
Exposure Frequency
350
days/year
USEPA, 2014
AT x 24 hours/day
ED1
Exposure Duration (Age 6 -16)
10
years
(1), USEPA, 2005, 2014)
ED2
Exposure Duration (Age 16 - 26)
10
years
(1), USEPA, 2005, 2014)
CA = (1 /PEF + 1 /VF) x Cs
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
7,300
days
USEPA, 2014
PEF
Particulate Emission Factor
3.24E+09
m3/kg
USEPA, 1996, 2018
VF
Volatilization Factor
Chemical-specific
m3/kg
USEPA, 2002a
Q/C
Inverse of mean concentration at
87.36898
g/m2-s per
USEPA, 1996, 2018
center of source
kg/m3
Notes:
1 - Adults will be evaluated as one age group (7 - 26 years) for non-mutagenic chemicals. For chemicals that act via the mutagenic mode of action, adults will be evaluated as two age groups, 7-16 years and 16-26 years in accordance
with USEPA's Supplemental Guidance of Assessing Susceptibility from Early-Life Exposure to Carcinogens (USEPA, 2005).
Sources:
USEPA, 1996: Soil Screening Level Guidance: Technical Background Document.
USEPA, 2002a: Supplemental Guidance for Developing Soil Screening Levels for Superfund Sites. OSWER 9355.4-24.
USEPA, 2002b: Calculating Upper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Sites. OSWER 9285.6-10.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
USEPA, 2018: USEPA Regional Screening Level Calculator at http://epa-prgs.ornl.gov/cgi-bin/chemicals/csl_search. Site-specific values for Philadelphia, PA.
-------
TABLE 4.15.RME
VALUES USED FOR DAILY INTAKE CALCULATIONS
REASONABLE MAXIMUM EXPOSURE - ADULT RESIDENTS - GROUNDWATER
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Groundwater
Exposure Medium: Groundwater
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Code
Parameter Definition
Value
Units
Rationale/
Reference
Intake Equation/
Model Name
Ingestion
Residents
Adult
Old Wilmington Road
CGW
CF
Chemical Concentration in Groundwater
Conversion Factor
95% UCL or Max
0.001
ug/L
mg/ug
USEPA, 2014a
Chronic Daily Intake (CDI) (mg/kg/day) =
IR-GW
Ingestion Rate of Groundwater
2.5
L/day
USEPA, 2014b
CGW x CF x IR-GW x EF x ED
EF
Exposure Frequency
350
days/year
USEPA, 2014b
BWx AT
ED1
Exposure Duration (Age 6 -16)
10
years
(1), USEPA, 2005, 2014b
ED2
Exposure Duration (Age 16 - 26)
10
years
(1), USEPA, 2005, 2014b
BW
Body Weight
80
kg
USEPA, 2014b
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014b
AT-N
Averaging Time (Non-Cancer)
7,300
days
USEPA, 2014b
Dermal
Residents
Adult
Old Wilmington Road
Daevent
Dermally Absorbed Dose per Event
Calculated
mg/cm2-event
USEPA, 2004
Dermally Absorbed Dose (mg/kg/day) =
Cw
Chemical Concentration in Groundwater
Max or 95% UCL
ug/L
USEPA, 2014a
DAevent x EV x EF x ED x SA
FA
Fraction Absorbed
Chemical Specific
unitless
USEPA, 2004
BWx AT
CF
Conversion factor
0.001
L/cm3
Kp
Permeability coefficient
Chemical Specific
cm/hr
USEPA, 2004
For inorganics
X
Lag time
Chemical Specific
hr/event
USEPA, 2004
DAevent = Kp x CW x CF x tevent
t*
Time it takes to reach steady state
Chemical Specific
hr/event
USEPA, 2004
tevent
Duration of event
0.71
hr/event
USEPA, 2014b
For organics if tevent <= t*
B
Bunge model constant
Chemical Specific
unitless
USEPA, 2004
DAevent = 2 x FA x Kp x Cw x CF x sqrt[(6 xix tevent)/pi]
SA
Skin Surface Available for Contact
19,652
cm2
USEPA, 2014b
EV
Event Frequency
1
events/day
USEPA, 2004
EF
Exposure Frequency
350
days/year
USEPA, 2014b
For organics if tevent > t*
ED1
Exposure Duration (Age 6 -16)
10
years
(1), USEPA, 2005, 2014b
DAevent = FA x Kp x Cw x CF x [tevent/(1 +B) +
ED2
Exposure Duration (Age 16 - 26)
10
years
(1), USEPA, 2005, 2014b
2xt x(1 + 3B + 3B2)/(1 +B2)]
BW
Body Weight
80
kg
USEPA, 2014b
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014b
AT-N
Averaging Time (Non-Cancer)
7,300
days
USEPA, 2014b
Notes:
1 - Adults will be evaluated as one age group (7 - 26 years) for non-mutagenic chemicals. For chemicals that act via the mutagenic mode of action, adults will be evaluated as two age groups, 7-16 years and 16-26 years in accordance
with USEPA's Supplemental Guidance of Assessing Susceptibility from Early-Life Exposure to Carcinogens (USEPA, 2005).
Sources:
USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
USEPA, 2014a: Determining Groundwater Exposure Point Concentrations. OSWER 9283.1-42
USEPA, 2014b: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
-------
TABLE 4.16.RME
VALUES USED FOR DAILY INTAKE CALCULATIONS
REASONABLE MAXIMUM EXPOSURE - ADULT RESIDENTS - INHALATION OF VOLATILES FROM GROUNDWATER
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Groundwater
Exposure Medium: Air
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Code
Parameter Definition
Value
Units
Rationale/
Reference
Intake Equation/
Model Name
Inhalation
Residents
Adult
Old Wilmington Road
S
Volatile Chemical Generation Rate
Derived
mg/m3-min-shower
Foster&Chrostowski 1987
Exposure Concentration (mg/m3)=
K
Mass Transfer Coefficient
Derived
min
Foster&Chrostowski 1987
EF
Exposure Frequency
350
showers/year
USEPA, 2014
Sx Kx EFx ED
ED1
Exposure Duration (Age 6-16)
10
years
(1), USEPA, 2005, 2014
AT x Ra x CF
ED2
Exposure Duration (Age 16-26)
10
years
(1), USEPA, 2005, 2014
Ra
Air Exchange Rate
0.017
min"1
Foster&Chrostowski 1987
K = Ds + exof-Ra x Dt") - exofRa x CDs - Dt)l
CF
Conversion Factor
1,440
min/day
-
Ra
Ds
Shower Duration
42.6
min
USEPA, 2014
Dt
Total Time in Bathroom
60
min
(2)
Fr
Shower Water Flow Rate
10
L/min
Foster&Chrostowski 1987
Sv
Shower Room Air Volume
6
m3
Foster&Chrostowski 1987
ts
Shower Dropler Drop Time
2
sec
Foster&Chrostowski 1987
d
Shower Droplet Diameter
1
mm
Foster&Chrostowski 1987
T1
Calibration WaterTemperature
293
K
Foster&Chrostowski 1987
Ts
Shower Water Temperature
318
K
Foster&Chrostowski 1987
ml
Water Viscosity at T1
1.002
cp
Foster&Chrostowski 1987
ms
Water Viscosity at Ts
0.596
cp
Foster&Chrostowski 1987
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Noncancer)
7,300
days
USEPA, 2014
Notes:
1 - Adults will be evaluated as one age group (7 - 26 years) for non-mutagenic chemicals. For chemicals that act via the mutagenic mode of action, adults will be evaluated as two age groups, 7-16 years and 16 - 26 years in accordance
with USEPA's Supplemental Guidance of Assessing Susceptibility from Early-Life Exposure to Carcinogens (USEPA, 2005).
2 - Professional judgment.
Sources:
USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
Foster, S.A. and P.C. Chrostowski, 1987. Inhalation Exposure to Volatile Organic Contaminants in the Shower.
-------
TABLE 4.17.RME
VALUES USED FOR DAILY INTAKE CALCULATIONS
REASONABLE MAXIMUM EXPOSURE - ADULT RESIDENTS - SEDIMENT
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Current/Future
Medium: Sediment
Exposure Medium: Sediment
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Parameter Definition
Value
Units
Rationale/
Intake Equation/
Code
Reference
Model Name
Ingestion
Residents
Adult
Old Wilmington Road
CS
Chemical concentration in sediment
Max or 95% UCL
mg/kg
USEPA, 2002
Intake (mg/kg/day) =
IR-S
Ingestion Rate
100
mg/day
USEPA, 2014
RBA
Relative Bioavailability
Chemical Specific
unitless
USEPA, 1989
Cs x RBA x IRS x CF3 x Fl x EF x ED
CF3
Conversion Factor 3
1.0E-06
kg/mg
-
BWx AT
Fl
Fraction Ingested
1
unitless
(1)
EF
Exposure Frequency
52
days/year
(1)
ED1
Exposure Duration (Age 6 - 16)
10
years
(2), USEPA, 2005, 2014
ED2
Exposure Duration (Age 16 - 26)
10
years
(2), USEPA, 2005, 2014
BW
Body Weight
80
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
7,300
days
USEPA, 2014
Dermal
Residents
Adult
Old Wilmington Road
CS
Chemical concentration in sediment
Max or 95% UCL
mg/kg
USEPA, 2002
Dermally Absorbed Dose (mg/kg/day) =
CF3
Conversion Factor 3
1.0E-06
kg/mg
-
SA
Skin Surface Available for Contact
6,032
cm2
USEPA, 2014
CS x CF3 x SA x SSAF x DABS x EV x EF x ED
SSAF
Soil to Skin Adherence Factor
0.07
mg/cm2/event
USEPA, 2014
BWx AT
DABS
Absorption Factor
Chemical Specific
unitless
USEPA, 2004
EV
Events Frequency
1
events/day
USEPA, 2004
EF
Exposure Frequency
52
days/year
(1)
ED1
Exposure Duration (Age 6 - 16)
10
years
(2), USEPA, 2005, 2014
ED2
Exposure Duration (Age 16 - 26)
10
years
(2), USEPA, 2005, 2014
BW
Body Weight
80
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
7,300
days
USEPA, 2014
Notes:
1 - Professional judgment. Assume two days a week in warm weather months for RME and one day a weekfor CTE.
2 - Adults will be evaluated as one age group (7 - 26 years) for non-mutagenic chemicals. For chemicals that act via the mutagenic mode of action, adults will be evaluated as two age groups, 7-16 years and 16-26 years in accordance
with USEPA's Supplemental Guidance of Assessing Susceptibility from Early-Life Exposure to Carcinogens (USEPA, 2005).
Sources:
USEPA, 1989: Risk Assessment Guidance for Superfund. Vol 1: Human Health Evaluation Manual, Part A. EPA/540/1-86/060.
USEPA, 2002: Calculating Upper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Sites. OSWER 9285.6-10, December.
USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
-------
TABLE 4.1.CTE
VALUES USED FOR DAILY INTAKE CALCULATIONS
CENTRAL TENDENCY EXPOSURES - CONSTRUCTION WORKERS - SOILS
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Surface Soil/Subsurface Soil
Exposure Medium: Surface/Subsurface Soil
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Parameter Definition
Value
Units
Rationale/
Intake Equation/
Code
Reference
Model Name
Ingestion
Construction Workers
Adult
Old Wilmington Road
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002a
Intake (mg/kg/day) =
IR-S
Ingestion Rate
165
mg/day
(1)
RBA
Relative Bioavailability
Chemical Specific
unitless
USEPA, 1989
Cs x RBA x IRS x CF3 x Fl x EF x ED
CF3
Conversion Factor 3
1.0E-06
kg/mg
-
BWx AT
Fl
Fraction Ingested
1
unitless
USEPA, 2002b
EF
Exposure Frequency
125
days/year
(1)
ED
Exposure Duration
1
years
(1)
BW
Body Weight
80
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
365
days
USEPA, 2014
Dermal
Construction Workers
Adult
Old Wilmington Road
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002a
Dermally Absorbed Dose (mg/kg/day) =
CF3
Conversion Factor 3
1.0E-06
kg/mg
-
SA
Skin Surface Available for Contact
3,527
cm2
USEPA, 2014
CS x CF3 x SA x SSAF x DABS x EV x EF x ED
SSAF
Soil to Skin Adherence Factor
0.1
mg/cm2/event
USEPA, 2004
BWx AT
DABS
Absorption Factor
Chemical Specific
unitless
USEPA, 2004
EV
Events Frequency
1
events/day
USEPA, 2004
EF
Exposure Frequency
125
days/year
(1)
ED
Exposure Duration
1
years
(1)
BW
Body Weight
80
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
365
days
USEPA, 2014
Notes:
1 - Professional judgment. For some factors, CTE is assumed to be 50 percent of RM E.
Sources:
USEPA, 1989: Risk Assessment Guidance for Superfund. Vol 1: Human Health Evaluation Manual, Part A.
USEPA, 2002a:Calculating Upper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Sites. OSWER 9285.6-10, December.
USEPA, 2002b: Supplemental Guidance for Developing Soil Screening Levels for Superfund Sites. OSWER 9355.4-24.
USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
-------
TABLE 4.2.CTE
VALUES USED FOR DAILY INTAKE CALCULATIONS
CENTRAL TENDENCY EXPOSURES - CONSTRUCTION WORKERS - SOILS TO AIR
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Surface Soil/Subsurface Soil
Exposure Medium: Air
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Code
Parameter Definition
Value
Units
Rationale/
Reference
Intake Equation/
Model Name
Inhalation
Construction Workers
Adult
Old Wilmington Road
CA
Chemical concentration in air
Calculated
mg/m3
USEPA, 2002a
Exposure Concentration (mg/m3) =
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002b
ET
Exposure Time
8
hours/day
(1)
CAx ET x EF x ED
EF
Exposure Frequency
125
days/year
(1)
AT x 24 hours/day
ED
Exposure Duration
1
years
(1)
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
CA= (1/PEF + 1 /VF) x Cs
AT-N
Averaging Time (Non-Cancer)
365
days
USEPA, 2014
PEF
Particulate Emission Factor
1.40E+06
m3/kg
USEPA, 2002a
VF
Volatilization Factor
Chemical-specific
m3/kg
USEPA, 2002a
Q/C
Inverse of mean concentration at
14.31
g/m2-s per
USEPA, 2002a
center of source
kg/m3
Notes:
1 - Professional judgment. For some factors, CTE is assumed to be 50 percent of RME.
Sources:
USEPA, 2002a: Supplemental Guidance for Developing Soil Screening Levels for Superfund Sites. OSWER 9355.4-24.
USEPA, 2002b:Calculating Upper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Sites. OSWER 9285.6-10, December.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
-------
TABLE 4.3.CTE
VALUES USED FOR DAILY INTAKE CALCULATIONS
CENTRAL TENDENCY EXPOSURES - CONSTRUCTION WORKERS - GROUNDWATER
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Groundwater
Exposure Medium: Groundwater
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Code
Parameter Definition
Value
Units
Rationale/
Reference
Intake Equation/
Model Name
Ingestion
Construction Workers
Adult
Old Wilmington Road
CGW
CF
Chemical Concentration in Groundwater
Conversion Factor
Max or 95% UCL
0.001
ug/L
mg/ug
USEPA, 2014a
Chronic Daily Intake (CDI) (mg/kg/day) =
IR-GW
Ingestion Rate of Groundwater
0.05
L/day
(1)
CGW x CFx IR-GW x EF x ED
EF
Exposure Frequency
30
days/year
(1)
BW x AT
ED
Exposure Duration
1
years
(1)
BW
Body Weight
80
kg
USEPA, 2014b
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014b
AT-N
Averaging Time (Non-Cancer)
365
days
USEPA, 2014b
Dermal
Construction Workers
Adult
Old Wilmington Road
Daevent
Cw
Dermally Absorbed Dose per Event
Chemical Concentration in Groundwater
Calculated
Max or 95% UCL
mg/cm2-event
ug/L
USEPA, 2004
USEPA, 2014a
Dermally Absorbed Dose (mg/kg/day) =
FA
Fraction Absorbed
Chemical Specific
unitless
USEPA, 2004
DAevent x EV x EF x ED x SA
CF
Conversion factor
0.001
L/cm3
BW x AT
Kp
Permeability coefficient
Chemical Specific
cm/hr
USEPA, 2004
X
Lag time
Chemical Specific
hr/event
USEPA, 2004
For inorganics
t*
Time it takes to reach steady state
Chemical Specific
hr/event
USEPA, 2004
DAevent = Kp x CW x CF x tevent
tevent
Duration of event
4
hr/event
(1)
B
Bunge model constant
Chemical Specific
unitless
USEPA, 2004
For organics if tevent <= t*
SA
Skin Surface Available for Contact
3,527
cm2
USEPA, 2014b
DAevent= 2 x FAx Kp x Cw x CF x sqrt[(6 xix tevent)/pi]
EV
Event Frequency
1
events/day
(1)
EF
Exposure Frequency
30
days/year
(1)
For organics if tevent > t*
ED
Exposure Duration
1
years
(1)
DAevent =FA x Kp x Cw x CF x [tevent/(1 +B) +
BW
Body Weight
80
kg
USEPA, 2014b
2n +(1 + 3B + 3B2)/(1 +B2)
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014b
AT-N
Averaging Time (Non-Cancer)
365
days
USEPA, 2014b
Notes
1 - Professional judgment. For some factors, CTE is assumed to be 50 percent of RME.
USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
USEPA, 2014a: Determining Groundwater Exposure Point Concentrations. OSWER 9283.1-42
USEPA, 2014b: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
-------
TABLE 4.4.CTE
VALUES USED FOR DAILY INTAKE CALCULATIONS
CENTRAL TENDENCY EXPOSURES - CONSTRUCTION WORKERS - GROUNDWATER TO AIR
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Groundwater
Exposure Medium: Air
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Code
Parameter Definition
Value
Units
Rationale/
Reference
Intake Equation/
Model Name
Inhalation
Construction Workers
Adult
Old Wilmington Road
CA
Chemical concentration in air
Calculated
mg/m3
VDEQ, 2018
Exposure Concentration (mg/m3) =
CW
Chemical concentration in water.
Max or 95% UCL
ug/L
USEPA, 2014a
CF
Conversion Factor
0.001
mg/ug
-
CA x ET x EF x ED
ET
Exposure Time
4
hours/day
(1)
AT x 24 hours/day
EF
Exposure Frequency
30
days/year
(1)
ED
Exposure Duration
1
years
(1)
CA = CW x CF x VF
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014b
AT-N
Averaging Time (Non-Cancer)
365
days
USEPA, 2014b
VF
Volatilization Factor
Calculated
(mg/m3)/(mg/L)
VDEQ, 2018
Notes:
1 - Professional judgment. For some factors, CTE is assumed to be 50 percent of RME.
USEPA, 2014a: Determining Groundwater Exposure Point Concentrations. OSWER 9283.1-42
USEPA, 2014b: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
VDEQ, 2018: Virginia Unified Risk Assessment Model - VURAM 2.0 User's Guide.
-------
TABLE 4.5.CTE
VALUES USED FOR DAILY INTAKE CALCULATIONS
CENTRAL TENDENCY EXPOSURES - INDUSTRIAL WORKERS - SOIL
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Current/Future
Medium: Surface Soil/Subsurface Soil
Exposure Medium: Surface/Subsurface Soil
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Parameter Definition
Value
Units
Rationale/
Intake Equation/
Code
Reference
Model Name
Ingestion
Industrial Workers
Adult
Old Wilmington Road
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002
Intake (mg/kg/day) =
IR-S
Ingestion Rate
50
mg/day
USEPA, 2011
RBA
Relative Bioavailability
Chemical Specific
unitless
USEPA, 1989
Cs x RBA x IRS x CF3 x Fl x EF x ED
CF3
Conversion Factor 3
1.0E-06
kg/mg
-
BWx AT
Fl
Fraction Ingested
1
unitless
USEPA, 1993
EF
Exposure Frequency
219
days/year
USEPA, 1993
ED
Exposure Duration
7
years
USEPA, 2011
BW
Body Weight
80
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
2,555
days
USEPA, 2014
Dermal
Industrial Workers
Adult
Old Wilmington Road
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002
Dermally Absorbed Dose (mg/kg/day) =
CF3
Conversion Factor 3
1.0E-06
kg/mg
-
SA
Skin Surface Available for Contact
3,527
cm2
USEPA, 2004
CS x CF3 x SA x SSAF x DABS x EV x EF x ED
SSAF
Soil to Skin Adherence Factor
0.02
mg/cm2/event
USEPA, 2004
BWx AT
DABS
Absorption Factor
Chemical Specific
unitless
USEPA, 2004
EV
Events Frequency
1
events/day
USEPA, 2004
EF
Exposure Frequency
219
days/year
USEPA, 1993
ED
Exposure Duration
7
years
USEPA, 2011
BW
Body Weight
80
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
2,555
days
USEPA, 2014
Risk Assessment Guidance for Superfund. Vol 1: Human Health Evaluation Manual, Part A.
Superfund's Standard Default Exposure Factors for the Central Tendency and Reasonable Maximum Exposure.
Calculating Upper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Sites. OSWER 9285.6-10, December.
Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
Exposure Factors Handbook: 2011 Edition. EPA/600R-090/052F, Table 5-1, 16-103, and 16-105..
Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
Sources:
USEPA, 1989:
USEPA, 1993:
USEPA, 2002:
USEPA, 2004:
USEPA, 2011:
USEPA, 2014:
-------
TABLE 4.6.CTE
VALUES USED FOR DAILY INTAKE CALCULATIONS
CENTRAL TENDENCY EXPOSURES - INDUSTRIAL WORKERS - SOIL TO AIR
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Current/Future
Medium: Surface Soil/Subsurface Soil
Exposure Medium: Air
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Code
Parameter Definition
Value
Units
Rationale/
Reference
Intake Equation/
Model Name
Inhalation
Industrial Workers
Adult
Old Wilmington Road
CA
Chemical concentration in air
Calculated
mg/m3
USEPA, 2002a
Exposure Concentration (mg/m3) =
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002b
ET
Exposure Time
8
hours/day
USEPA, 2014
CAx ET x EF x ED
EF
Exposure Frequency
219
days/year
USEPA, 1993
AT x 24 hours/day
ED
Exposure Duration
7
years
USEPA, 2011
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
CA= (1/PEF + 1 /VF) x Cs
AT-N
Averaging Time (Non-Cancer)
2,555
days
USEPA, 2014
PEF
Particulate Emission Factor
3.24E+09
m3/kg
USEPA, 1996, 2018
VF
Volatilization Factor
Chemical-specific
m3/kg
USEPA, 2002a
Q/C
Inverse of mean concentration at
87.36898
g/m2-s per
USEPA, 2018
center of source
kg/m3
Sources:
USEPA, 1993: Superfund Standard Default Exposure Factors for the Central Tendency and Reasonable Maximum Exposure.
USEPA, 1996: Soil Screening Level Guidance: Technical Background Document.
USEPA, 2002a: Supplemental Guidance for Developing Soil Screening Levels for Superfund Sites. OSWER 9355.4-24.
USEPA, 2002b:Calculating Upper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Sites. OSWER 9285.6-10, December.
USEPA, 2011: Exposure Factors Handbook: 2011 Edition. EPA/600R-090/052F, Tables 16-103 and 16-105.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
USEPA, 2018: USEPA Regional Screening Level Calculator at http://epa-prgs.ornl.gov/cgi-bin/chemicals/csl_search. Site-specific values for Philadelphia, PA.
-------
TABLE 4.7.CTE
VALUES USED FOR DAILY INTAKE CALCULATIONS
CENTRAL TENDENCY EXPOSURES - INDUSTRIAL WORKERS - GROUNDWATER
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Groundwater
Exposure Medium: Groundwater
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Code
Parameter Definition
Value
Units
Rationale/
Reference
Intake Equation/
Model Name
Ingestion
Industrial Workers
Adult
Old Wilmington Road
CGW
CF
Chemical Concentration in Groundwater
Conversion Factor
Max or 95% UCL
0.001
ug/L
mg/ug
USEPA, 2014a
Chronic Daily Intake (CDI) (mg/kg/day) =
IR-GW
Ingestion Rate of Groundwater
0.6
L/day
(1)
CGW x CF x IR-GW x EF x ED
EF
Exposure Frequency
219
days/year
USEPA, 1993
BWx AT
ED
Exposure Duration
6.6
years
(2)
BW
Body Weight
80
kg
USEPA, 2014b
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014b
AT-N
Averaging Time (Non-Cancer)
2,409
days
USEPA, 2014b
Dermal
Industrial Workers
Adult
Old Wilmington Road
Daevent
Cw
Dermally Absorbed Dose per Event
Chemical Concentration in Groundwater
Calculated
Max or 95% UCL
mg/cm2-event
ug/L
USEPA, 2004
USEPA, 2014a
Dermally Absorbed Dose (mg/kg/day) =
FA
Fraction Absorbed
Chemical Specific
unitless
USEPA, 2004
DAevent x EVx EF x ED x SA
CF
Conversion factor
0.001
L/cm3
BWx AT
Kp
Permeability coefficient
Chemical Specific
cm/hr
USEPA, 2004
X
Lag time
Chemical Specific
hr/event
USEPA, 2004
For inorganics
t*
Time it takes to reach steady state
Chemical Specific
hr/event
USEPA, 2004
DAevent = Kp x CW x CF x tevent
tevent
Duration of event
0.25
hr/event
(3)
B
Bunge model constant
Chemical Specific
unitless
USEPA, 2004
For organics if tevent <= t*
SA
Skin Surface Available for Contact
3,527
cm2
USEPA, 2014b
DAevent = 2 x FAx Kp x Cw x CF x sqrt[(6 xix tevent)/pi]
EV
Event Frequency
1
events/day
(3)
EF
Exposure Frequency
219
days/year
USEPA, 1993
For organics if tevent > t*
ED
Exposure Duration
6.6
years
(2)
DAevent = FAx Kp x Cw x CF x [tevent/(1+B) +
BW
Body Weight
80
kg
USEPA, 2014b
2n x (1 + 3B+ 3B2)/(1 +B2)]
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014b
AT-N
Averaging Time (Non-Cancer)
2,409
days
USEPA, 2014b
Notes
1 - USEPA, 2014: Frequently Asked Questions (FAQs) About Update of Standard Default Exposure Factors.
2-USEPA, 2011. Exposure Factors Handbook: 2011 Edition, Table 16-103.
3 - Professional judgment.
USEPA, 1993: Superfund's Standard Default Exposure Factors for the Central Tendency and Reasonable Maximum Exposure.
USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
USEPA, 2014a: Determining Groundwater Exposure Point Concentrations. OSWER 9283.1-42
USEPA, 2014b: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
-------
TABLE 4.8.CTE
VALUES USED FOR DAILY INTAKE CALCULATIONS
REASONABLE MAXIMUM EXPOSURE - ADULT RESIDENTS - INHALATION OF VOLATILES FROM GROUNDWATER
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Groundwater
Exposure Medium: Air
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Parameter Definition
Value
Units
Rationale/
Intake Equation/
Code
Reference
Model Name
Inhalation
Industrial Workers
Adult
Old Wilmington Road
S
Volatile Chemical Generation Rate
Derived
mg/m3-min-shower
Foster & Chrostowski 1987
Exposure Concentration (mg/m3)=
K
Mass Transfer Coefficient
Derived
min
Foster&Chrostowski 1987
EF
Exposure Frequency
219
days/year
USEPA, 1993
Sx Kx EFx ED
ED
Exposure Duration
6.6
years
USEPA, 2011
AT x Ra x CF
Ra
Air Exchange Rate
0.017
min"1
Foster&Chrostowski 1987
CF
Conversion Factor
1,440
min/day
-
K = Ds + exof-Ra x Dt") - exofRa x CDs - Dt)l
Ds
Shower Duration
10
min
(1)
Ra
Dt
Total Time in Bathroom
15
min
(1)
Fr
Shower Water Flow Rate
10
L/min
Foster&Chrostowski 1987
Sv
Shower Room Air Volume
6
m3
Foster&Chrostowski 1987
ts
Shower Dropler Drop Time
2
sec
Foster&Chrostowski 1987
d
Shower Droplet Diameter
1
mm
Foster&Chrostowski 1987
T1
Calibration WaterTemperature
293
K
Foster&Chrostowski 1987
Ts
Shower Water Temperature
318
K
Foster&Chrostowski 1987
ml
Water Viscosity at T1
1.002
cp
Foster&Chrostowski 1987
ms
Water Viscosity at Ts
0.596
cp
Foster&Chrostowski 1987
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Noncancer)
2,409
days
USEPA, 2014
Notes:
1 - Professional judgment. For some factors, CTE is assumed to be 50 percent of RME.
Sources:
USEPA, 1993: Superfund Standard Default Exposure Factors for the Central Tendency and Reasonable Maximum Exposure.
USEPA, 2011: Exposure Factors Handbook: 2011 Edition.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
Foster, S.A. and P.C. Chrostowski, 1987. Inhalation Exposure to Volatile Organic Contaminants in the Shower.
-------
TABLE 4.9.CTE
VALUES USED FOR DAILY INTAKE CALCULATIONS
CENTRAL TENDENCY EXPOSURES - CHILD RESIDENTS - SOILS
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Surface Soil/Subsurface Soil
Exposure Medium: Surface/Subsurface Soil
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Parameter Definition
Value
Units
Rationale/
Intake Equation/
Code
Reference
Model Name
Ingestion
Resident
Child
Old Wilmington Road
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002
Intake (mg/kg/day) =
IR-S
Ingestion Rate
100
mg/day
USEPA, 2011
RBA
Relative Bioavailability
Chemical Specific
unitless
USEPA, 1989
Cs x RBA x IRS x CF3 x Fl x EF x ED
CF3
Conversion Factor 3
1.0E-06
kg/mg
-
BWx AT
Fl
Fraction Ingested
1
unitless
USEPA, 1993
EF
Exposure Frequency
234
days/year
USEPA, 1993
ED1
Exposure Duration (Age 0-2)
1
years
(1), USEPA, 2005, 2011
ED2
Exposure Duration (Age 2-6)
1
years
(1), USEPA, 2005, 2011
BW
Body Weight
15
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
730
days
USEPA, 2014
Dermal
Resident
Child
Old Wilmington Road
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002
Dermally Absorbed Dose (mg/kg/day) =
CF3
Conversion Factor 3
1E-06
kg/mg
-
SA
Skin Surface Available for Contact
2,373
cm2
USEPA, 2014
CS x CF3 x SA x SSAF x DABS x EV x EF x ED
SSAF
Soil to Skin Adherence Factor
0.04
mg/cm2/event
USEPA, 2004
BWx AT
DABS
Absorption Factor
Chemical Specific
unitless
USEPA, 2004
EV
Events Frequency
1
events/day
USEPA, 2004
EF
Exposure Frequency
234
days/year
USEPA, 1993
ED1
Exposure Duration (Age 0-2)
1
years
(1), USEPA, 2005, 2011
ED2
Exposure Duration (Age 2-6)
1
years
(1), USEPA, 2005, 2011
BW
Body Weight
15
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
730
days
USEPA, 2014
Notes:
1 - Children will be evaluated as one age group (0-6 years) for non-mutagenic chemicals. For chemicals that act via the mutagenic mode of action, residential children will be evaluated as two age groups, 0-2 years and 2-6 years in accordance
with USEPA's Supplemental Guidance of Assessing Susceptibility from Early-Life Exposure to Carcinogens (USEPA, 2005).
Sources:
USEPA, 1989: Risk Assessment Guidance for Superfund. Vol 1: Human Health Evaluation Manual, Part A. EPA/540/1-86/060.
USEPA, 1993: Superfund Standard Default Exposure Factors for the Central Tendency and Reasonable Maximum Exposure.
USEPA, 2002: Calculating Upper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Sites. OSWER 9285.6-10, December.
USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
USEPA, 2011: Exposure Factors Handbook: 2011 Edition. EPA/600R-090/052F, Tables 5-1 and 16-108.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
-------
TABLE 4.10.CTE
VALUES USED FOR DAILY INTAKE CALCULATIONS
CENTRAL TENDENCY EXPOSURES - CHILD RESIDENTS - SOILS TO AIR
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Surface Soil/Subsurface Soil
Exposure Medium: Air
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Code
Parameter Definition
Value
Units
Rationale/
Reference
Intake Equation/
Model Name
Inhalation
Resident
Child
Old Wilmington Road
CA
Chemical concentration in air
Calculated
mg/m3
USEPA, 2002a
Exposure Concentration (mg/m3) =
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002b
ET
Exposure Time
24
hours/day
USEPA, 2014
CA x ET x EF x ED
EF
Exposure Frequency
234
days/year
USEPA, 1993
AT x 24 hours/day
ED1
Exposure Duration (Age 0 - 2)
1
years
(1), USEPA, 2005, 2011
ED2
Exposure Duration (Age 2 - 6)
1
years
(1), USEPA, 2005, 2011
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
CA = (1 /PEF + 1 /VF) x Cs
AT-N
Averaging Time (Non-Cancer)
730
days
USEPA, 2014
PEF
Particulate Emission Factor
3.24E+09
m3/kg
USEPA, 1996, 2018
VF
Volatilization Factor
Chemical-specific
m3/kg
USEPA, 2002a
Q/C
Inverse of mean concentration at
87.36898
g/m2-s per
USEPA, 1996, 2018
center of source
kg/m3
Notes:
1 - Children will be evaluated as one age group (0 - 6 years) for non-mutagenic chemicals. For chemicals that act via the mutagenic mode of action, residential children will be evaluated as two age groups, 0 - 2 years and 2 - 6 years in accordance
with USEPA's Supplemental Guidance of Assessing Susceptibility from Early-Life Exposure to Carcinogens (USEPA, 2005).
Sources:
USEPA, 1993: Superfund Standard Default Exposure Factors for the Central Tendency and Reasonable Maximum Exposure.
USEPA, 1996: Soil Screening Level Guidance: Technical Background Document.
USEPA, 2002a: Supplemental Guidance for Developing Soil Screening Levels for Superfund Sites. OSWER 9355.4-24.
USEPA, 2002b: Calculating Upper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Sites. OSWER 9285.6-10, December.
USEPA, 2011: Exposure Factors Handbook: 2011 Edition. EPA/600R-090/052F, Table 16-108.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
USEPA, 2018: USEPA Regional Screening Level Calculator at http://epa-prgs.ornl.gov/cgi-bin/chemicals/csl_search. Site-specific values for Philadelphia, PA.
-------
TABLE 4.11.CTE
VALUES USED FOR DAILY INTAKE CALCULATIONS
CENTRAL TENDENCY EXPOSURES - CHILD RESIDENTS - GROUNDWATER
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Groundwater
Exposure Medium: Groundwater
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Code
Parameter Definition
Value
Units
Rationale/
Reference
Intake Equation/
Model Name
Ingestion
Residents
Child
Old Wilmington Road
CGW
CF
Chemical Concentration in Groundwater
Conversion Factor
Max or 95% UCL
0.001
ug/L
mg/ug
USEPA, 2014a
Chronic Daily Intake (CDI) (mg/kg/day) =
IR-GW
Ingestion Rate of Groundwater
0.45
L/day
USEPA, 2011
CGW x CF x IR-GW x EF x ED
EF
Exposure Frequency
234
days/year
USEPA, 1993
BWx AT
ED1
Exposure Duration (Age 0 - 2)
2
years
(1), USEPA, 2005, 2011
ED2
Exposure Duration (Age 2 - 6)
1
years
(1), USEPA, 2005, 2011
BW
Body Weight
15
kg
USEPA, 2014b
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014b
AT-N
Averaging Time (Non-Cancer)
1,095
days
USEPA, 2014b
Dermal
Residents
Child
Old Wilmington Road
Daevent
Cw
Dermally Absorbed Dose per Event
Chemical Concentration in Groundwater
Calculated
Max or 95% UCL
mg/cm2-event
ug/L
USEPA, 2004
USEPA, 2014a
Dermally Absorbed Dose (mg/kg/day) =
FA
Fraction Absorbed
Chemical Specific
unitless
USEPA, 2004
DAevent x EVx EF x ED x SA
CF
Conversion factor
0.001
L/cm3
BWx AT
Kp
Permeability coefficient
Chemical Specific
cm/hr
USEPA, 2004
X
Lag time
Chemical Specific
hr/event
USEPA, 2004
For inorganics
t*
Time it takes to reach steady state
Chemical Specific
hr/event
USEPA, 2004
DAevent = Kp x CW x CF x tevent
tevent
Duration of event
0.33
hr/event
USEPA, 2004
B
Bunge model constant
Chemical Specific
unitless
USEPA, 2004
For organics if tevent <= t*
SA
Skin Surface Available for Contact
6,365
cm2
USEPA, 2014b
DAevent = 2 x FAx Kp x Cw x CF x sqrt[(6 xix tevent)/pi]
EV
Event Frequency
1
events/day
USEPA, 2004
EF
Exposure Frequency
234
days/year
USEPA, 1993
For organics if tevent > t*
ED1
Exposure Duration (Age 0 - 2)
2
years
(1), USEPA, 2005, 2011
DAevent = FAx Kp x Cw x CF x [tevent/(1+B) +
ED2
Exposure Duration (Age 2 - 6)
1
years
(1), USEPA, 2005, 2011
2x n(1 + 3B+ 3B2)/(1 +B2)]
BW
Body Weight
15
kg
USEPA, 2014b
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014b
AT-N
Averaging Time (Non-Cancer)
1,095
days
USEPA, 2014b
Notes:
1 - Children will be evaluated as one age group (0 - 6 years) for non-mutagenic chemicals. For chemicals that act via the mutagenic mode of action, residential children will be evaluated as two age groups, 0 - 2 years and 2 - 6 years in accordance
with USEPA's Supplemental Guidance of Assessing Susceptibility from Early-Life Exposure to Carcinogens (USEPA, 2005).
Sources:
USEPA, 1993: Superfund Standard Default Exposure Factors for the Central Tendency and Reasonable Maximum Exposure.
USEPA, 2002: Calculating Upper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Sites. OSWER 9285.6-10, December.
USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
USEPA, 2011: Exposure Factors Handbook: 2011 Edition. Tables 3-15 and 3-33.
USEPA, 2014a: Determining Groundwater Exposure Point Concentrations. OSWER 9283.1-42
USEPA, 2014b: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
-------
TABLE 4.12.CTE
VALUES USED FOR DAILY INTAKE CALCULATIONS
CENTRAL TENDENCY EXPOSURES - CHILD RESIDENTS - SEDIMENT
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Current/Future
Medium: Sediment
Exposure Medium: Sediment
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Parameter Definition
Value
Units
Rationale/
Intake Equation/
Code
Reference
Model Name
Ingestion
Resident
Child
Old Wilmington Road
CS
Chemical concentration in sediment
Max or 95% UCL
mg/kg
USEPA, 2002
Intake (mg/kg/day) =
IR-S
Ingestion Rate
100
mg/day
USEPA, 1993
RBA
Relative Bioavailability
Chemical Specific
unitless
USEPA, 1989
Cs x RBA x IRS x CF3 x Fl x EF x ED
CF3
Conversion Factor 3
1.0E-06
kg/mg
(1)
BWx AT
Fl
Fraction Ingested
1
unitless
(1)
EF
Exposure Frequency
26
days/year
(1)
ED1
Exposure Duration (Age 0-2)
1
years
(2), USEPA, 1993, 2005
ED2
Exposure Duration (Age 2-6)
1
years
(2), USEPA, 1993, 2005
BW
Body Weight
15
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
730
days
USEPA, 2014
Dermal
Resident
Child
Old Wilmington Road
CS
Chemical concentration in sediment
Max or 95% UCL
mg/kg
USEPA, 2002
Dermally Absorbed Dose (mg/kg/day) =
CF3
Conversion Factor 3
1.0E-06
kg/mg
-
SA
Skin Surface Available for Contact
2,373
cm2
USEPA, 2014
CS x CF3 x SA x SSAF x DABS x EV x EF x ED
SSAF
Soil to Skin Adherence Factor
0.04
mg/cm2/event
USEPA, 2004
BWx AT
DABS
Absorption Factor
Chemical Specific
unitless
USEPA, 2004
EV
Events Frequency
1
events/day
USEPA, 2004
EF
Exposure Frequency
26
days/year
(1)
ED1
Exposure Duration (Age 0-2)
1
years
(2), USEPA, 1993, 2005
ED2
Exposure Duration (Age 2-6)
1
years
(2), USEPA, 1993, 2005
BW
Body Weight
15
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
730
days
USEPA, 2014
Notes:
1 - Professional judgment. Assume two days a week in warm weather months for RME and one day a weekfor CTE.
2 - Children will be evaluated as one age group (0-6 years) for non-mutagenic chemicals. For chemicals that act via the mutagenic mode of action, children residents will be evaluated as two age groups, 0-2 years and 2-6 years in accordance
with USEPA's Supplemental Guidance of Assessing Susceptibility from Early-Life Exposure to Carcinogens (USEPA, 2005).
Sources:
USEPA, 1989: Risk Assessment Guidance for Superfund. Vol 1: Human Health Evaluation Manual, Part A. EPA/540/1-86/060.
USEPA, 1993: Superfund's Standard Default Exposure Factors for the Central Tendency and Reasonable Maximum Exposure.
USEPA, 2002: Calculating Upper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Sites. OSWER 9285.6-10, December.
USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
-------
TABLE 4.13.CTE
VALUES USED FOR DAILY INTAKE CALCULATIONS
CENTRAL TENDENCY EXPOSURES - ADULT RESIDENTS - SOILS
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Surface Soil/Subsurface Soil
sure Medium: Surface/Subsurface Soil
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Parameter Definition
Value
Units
Rationale/
Intake Equation/
Code
Reference
Model Name
Ingestion
Resident
Adult
Old Wilmington Road
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002
Intake (mg/kg/day) =
IR-S
Ingestion Rate
50
mg/day
USEPA, 2011
RBA
Relative Bioavailability
Chemical Specific
unitless
USEPA, 1989
Cs x RBA x IRS x CF3 x Fl x EF x ED
CF3
Conversion Factor 3
1.0E-06
kg/mg
-
BWx AT
Fl
Fraction Ingested
1
unitless
USEPA, 1993
EF
Exposure Frequency
234
days/year
USEPA, 1993
ED1
Exposure Duration (Age 6 - 16)
2
years
(1), USEPA, 2005, 2011
ED2
Exposure Duration (Age 16 - 26)
5
years
(1), USEPA, 2005, 2011
BW
Body Weight
80
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
2,555
days
USEPA, 2014
Dermal
Resident
Adult
Old Wilmington Road
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002
Dermally Absorbed Dose (mg/kg/day) =
CF3
Conversion Factor 3
1.0E-06
kg/mg
-
SA
Skin Surface Available for Contact
6,032
cm2
USEPA, 2014
CS x CF3 x SA x SSAF x DABS x EV x EF x ED
SSAF
Soil to Skin Adherence Factor
0.01
mg/cm2/event
USEPA, 2004
BWx AT
DABS
Absorption Factor
Chemical Specific
unitless
USEPA, 2004
EV
Events Frequency
1
events/day
USEPA, 2004
EF
Exposure Frequency
234
days/year
USEPA, 1993
ED1
Exposure Duration (Age 6 - 16)
2
years
(1), USEPA, 2005, 2011
ED2
Exposure Duration (Age 16 - 26)
5
years
(1), USEPA, 2005, 2011
BW
Body Weight
80
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
2,555
days
USEPA, 2014
Notes:
1 - Adults will be evaluated as one age group (7 - 26 years) for non-mutagenic chemicals. For chemicals that act via the mutagenic mode of action, adults will be evaluated as two age groups, 7-16 years and 16-26 years in accordance
with USEPA's Supplemental Guidance of Assessing Susceptibility from Early-Life Exposure to Carcinogens (USEPA, 2005).
Sources:
USEPA, 1989: Risk Assessment Guidance for Superfund. Vol 1: Human Health Evaluation Manual, Part A.
USEPA, 1993: Superfund Standard Default Exposure Factors for the Central Tendency and Reasonable Maximum Exposure.
USEPA, 2002: Calculating Upper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Sites. OSWER 9285.6-10.
USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
USEPA, 2011: Exposure Factors Handbook: 2011 Edition. EPA/600R-090/052F, Tables 5-1 and 16-108.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
-------
TABLE 4.14.CTE
VALUES USED FOR DAILY INTAKE CALCULATIONS
CENTRAL TENDENCY EXPOSURES - ADULT RESIDENTS - SOILS TO AIR
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Surface Soil/Subsurface Soil
Exposure Medium: Air
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Code
Parameter Definition
Value
Units
Rationale/
Reference
Intake Equation/
Model Name
Inhalation
Resident
Adult
Old Wilmington Road
CA
Chemical concentration in air
Calculated
mg/m3
USEPA, 2002a
Exposure Concentration (mg/m3) =
CS
Chemical concentration in soil
Max or 95% UCL
mg/kg
USEPA, 2002b
ET
Exposure Time
24
hours/day
USEPA, 2014
CA x ET x EF x ED
EF
Exposure Frequency
234
days/year
USEPA, 1993
AT x 24 hours/day
ED1
Exposure Duration (Age 6 -16)
2
years
(1), USEPA, 2005, 2011
ED2
Exposure Duration (Age 16 - 26)
5
years
(1), USEPA, 2005, 2011
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
CA = (1 /PEF + 1 /VF) x Cs
AT-N
Averaging Time (Non-Cancer)
2,555
days
USEPA, 2014
PEF
Particulate Emission Factor
3.24E+09
m3/kg
USEPA, 1996, 2018
VF
Volatilization Factor
Chemical-specific
m3/kg
USEPA, 2002a
Q/C
Inverse of mean concentration at
87.36898
g/m2-s per
USEPA, 1996, 2018
center of source
kg/m3
Notes:
1 - Adults will be evaluated as one age group (7 - 26 years) for non-mutagenic chemicals. For chemicals that act via the mutagenic mode of action, adults will be evaluated as two age groups, 7-16 years and 16-26 years in accordance
with USEPA's Supplemental Guidance of Assessing Susceptibility from Early-Life Exposure to Carcinogens (USEPA, 2005).
Sources:
USEPA, 1993: Superfund Standard Default Exposure Factors for the Central Tendency and Reasonable Maximum Exposure.
USEPA, 1996: Soil Screening Level Guidance: Technical Background Document.
USEPA, 2002a: Supplemental Guidance for Developing Soil Screening Levels for Superfund Sites. OSWER 9355.4-24.
USEPA, 2002b: Calculating Upper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Sites. OSWER 9285.6-10.
USEPA, 2011: Exposure Factors Handbook: 2011 Edition. EPA/600R-090/052F, Table 16-108.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
USEPA, 2018: USEPA Regional Screening Level Calculator at http://epa-prgs.ornl.gov/cgi-bin/chemicals/csl_search. Site-specific values for Philadelphia, PA.
-------
TABLE 4.15.CTE
VALUES USED FOR DAILY INTAKE CALCULATIONS
CENTRAL TENDENCY EXPOSURES - ADULT RESIDENTS - GROUNDWATER
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Groundwater
Exposure Medium: Groundwater
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Code
Parameter Definition
Value
Units
Rationale/
Reference
Intake Equation/
Model Name
Ingestion
Residents
Adult
Old Wilmington Road
CGW
CF
Chemical Concentration in Groundwater
Conversion Factor
95% UCL or Max
0.001
ug/L
mg/ug
USEPA, 2014a
Chronic Daily Intake (CDI) (mg/kg/day) =
IR-GW
Ingestion Rate of Groundwater
1.2
L/day
USEPA, 2011
CGW x CF x IR-GW x EF x ED
EF
Exposure Frequency
234
days/year
USEPA, 1993
BWx AT
ED1
Exposure Duration (Age 6-16)
2
years
(1), USEPA, 2005, 2011
ED2
Exposure Duration (Age 16-26)
7
years
(1), USEPA, 2005, 2011
BW
Body Weight
80
kg
USEPA, 2014b
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014b
AT-N
Averaging Time (Non-Cancer)
3,285
days
USEPA, 2014b
Dermal
Residents
Adult
Old Wilmington Road
Daevent
Cw
Dermally Absorbed Dose per Event
Chemical Concentration in Groundwater
Calculated
Max or 95% UCL
mg/cm2-event
ug/L
USEPA, 2004
USEPA, 2014a
Dermally Absorbed Dose (mg/kg/day) =
FA
Fraction Absorbed
Chemical Specific
unitless
USEPA, 2004
DAevent x EV x EF x ED x SA
CF
Conversion factor
0.001
L/cm3
BWx AT
Kp
Permeability coefficient
Chemical Specific
cm/hr
USEPA, 2004
X
Lag time
Chemical Specific
hr/event
USEPA, 2004
For inorganics
t*
Time it takes to reach steady state
Chemical Specific
hr/event
USEPA, 2004
DAevent = Kp x CW x CF x tevent
tevent
Duration of event
0.25
hr/event
USEPA, 2004
B
Bunge model constant
Chemical Specific
unitless
USEPA, 2004
For organics if tevent <= t*
SA
Skin Surface Available for Contact
19,652
cm2
USEPA, 2014b
DAevent = 2 x FA x Kp x Cw x CF x sqrt[(6 xix tevent)/pi]
EV
Event Frequency
1
events/day
USEPA, 2004
EF
Exposure Frequency
234
days/year
USEPA, 1993
For organics if tevent > t*
ED1
Exposure Duration (Age 6-16)
2
years
(1), USEPA, 2005, 2011
DAevent = FA x Kp x Cw x CF x [tevent/(1 + B) +
ED2
Exposure Duration (Age 16-26)
7
years
(1), USEPA, 2005, 2011
2xtx(1 + 3B + 3B2)/(1 + B2)]
BW
Body Weight
80
kg
USEPA, 2014b
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014b
AT-N
Averaging Time (Non-Cancer)
3,285
days
USEPA, 2014b
Notes:
1 - Adults will be evaluated as one age group (7 - 26 years) for non-mutagenic chemicals. For chemicals that act via the mutagenic mode of action, adults will be evaluated as two age groups, 7-16 years and 16-26 years in accordance
with USEPA's Supplemental Guidance of Assessing Susceptibility from Early-Life Exposure to Carcinogens (USEPA, 2005).
Sources:
USEPA, 1993: Superfund Standard Default Exposure Factors for the Central Tendency and Reasonable Maximum Exposure.
USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
USEPA, 2011: Exposure Factors Handbook: 2011 Edition, Table 3-33.
USEPA, 2014a: Determining Groundwater Exposure Point Concentrations. OSWER 9283.1-42
USEPA, 2014b: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
-------
TABLE 4.16.CTE
VALUES USED FOR DAILY INTAKE CALCULATIONS
REASONABLE MAXIMUM EXPOSURE - ADULT RESIDENTS - INHALATION OF VOLATILES FROM GROUNDWATER
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Future
Medium: Groundwater
Exposure Medium: Air
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Code
Parameter Definition
Value
Units
Rationale/
Reference
Intake Equation/
Model Name
Inhalation
Residents
Adult
Old Wilmington Road
S
Volatile Chemical Generation Rate
Derived
mg/m3-min-shower
Foster & Chrostowski 1987
Exposure Concentration (mg/m3)=
K
Mass Transfer Coefficient
Derived
min
Foster&Chrostowski 1987
EF
Exposure Frequency
234
showers/year
USEPA, 1993
Sx Kx EFx ED
ED1
Exposure Duration (Age 6-16)
2
years
(1), USEPA, 2005, 2011
AT x Ra x CF
ED2
Exposure Duration (Age 16-26)
7
years
(1), USEPA, 2005, 2011
Ra
Air Exchange Rate
0.017
min"1
Foster&Chrostowski 1987
K = Ds + exof-Ra x Dt") - exofRa x CDs - Dt)l
CF
Conversion Factor
1,440
min/day
-
Ra
Ds
Shower Duration
10
min
USEPA, 2004
Dt
Total Time in Bathroom
15
min
(2)
Fr
Shower Water Flow Rate
10
L/min
Foster&Chrostowski 1987
Sv
Shower Room Air Volume
6
m3
Foster&Chrostowski 1987
ts
Shower Dropler Drop Time
2
sec
Foster&Chrostowski 1987
d
Shower Droplet Diameter
1
mm
Foster&Chrostowski 1987
T1
Calibration WaterTemperature
293
K
Foster&Chrostowski 1987
Ts
Shower Water Temperature
318
K
Foster&Chrostowski 1987
ml
Water Viscosity at T1
1.002
cp
Foster&Chrostowski 1987
ms
Water Viscosity at Ts
0.596
cp
Foster&Chrostowski 1987
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Noncancer)
3,285
days
USEPA, 2014
Notes:
1 - Adults will be evaluated as one age group (7 - 26 years) for non-mutagenic chemicals. For chemicals that act via the mutagenic mode of action, adults will be evaluated as two age groups, 7-16 years and 16 - 26 years in accordance
with USEPA's Supplemental Guidance of Assessing Susceptibility from Early-Life Exposure to Carcinogens (USEPA, 2005).
2 - Professional judgment.
Sources:
USEPA, 1993: Superfund Standard Default Exposure Factors for the Central Tendency and Reasonable Maximum Exposure.
USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
USEPA, 2011: Exposure Factors Handbook: 2011 Edition, Table 3-33.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
Foster, S.A. and P.C. Chrostowski, 1987. Inhalation Exposure to Volatile Organic Contaminants in the Shower.
-------
TABLE 4.17.CTE
VALUES USED FOR DAILY INTAKE CALCULATIONS
CENTRAL TENDENCY EXPOSURES - ADULT RESIDENTS - SEDIMENT
OLD WILMINGTON ROAD SITE
Scenario Timeframe: Current/Future
Medium: Sediment
Exposure Medium: Sediment
Exposure Route
Receptor Population
Receptor Age
Exposure Point
Parameter
Parameter Definition
Value
Units
Rationale/
Intake Equation/
Code
Reference
Model Name
Ingestion
Residents
Adult
Old Wilmington Road
CS
Chemical concentration in sediment
Max or 95% UCL
mg/kg
USEPA, 2002
Intake (mg/kg/day) =
IR-S
Ingestion Rate
50
mg/day
USEPA, 1993
RBA
Relative Bioavailability
Chemical Specific
unitless
USEPA, 1989
Cs x RBA x IRS x CF3 x Fl x EF x ED
CF3
Conversion Factor 3
1.0E-06
kg/mg
-
BWx AT
Fl
Fraction Ingested
1
unitless
(1)
EF
Exposure Frequency
26
days/year
(1)
ED1
Exposure Duration (Age 6 - 16)
2
years
(2), USEPA, 1993, 2005
ED2
Exposure Duration (Age 16 - 26)
5
years
(2), USEPA, 1993, 2005
BW
Body Weight
80
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
2,555
days
USEPA, 2014
Dermal
Residents
Adult
Old Wilmington Road
CS
Chemical concentration in sediment
Max or 95% UCL
mg/kg
USEPA, 2002
Dermally Absorbed Dose (mg/kg/day) =
CF3
Conversion Factor 3
1.0E-06
kg/mg
-
SA
Skin Surface Available for Contact
6,032
cm2
USEPA, 2014
CS x CF3 x SA x SSAF x DABS x EV x EF x ED
SSAF
Soil to Skin Adherence Factor
0.01
mg/cm2/event
USEPA, 2004
BWx AT
DABS
Absorption Factor
Chemical Specific
unitless
USEPA, 2004
EV
Events Frequency
1
events/day
USEPA, 2004
EF
Exposure Frequency
26
days/year
(1)
ED1
Exposure Duration (Age 6 - 16)
2
years
(2), USEPA, 1993, 2005
ED2
Exposure Duration (Age 16 - 26)
5
years
(2), USEPA, 1993, 2005
BW
Body Weight
80
kg
USEPA, 2014
AT-C
Averaging Time (Cancer)
25,550
days
USEPA, 2014
AT-N
Averaging Time (Non-Cancer)
2,555
days
USEPA, 2014
Notes:
1 - Professional judgment. Assume two days a week in warm weather months for RME and one day a weekfor CTE.
2 - Adults will be evaluated as one age group (7 - 26 years) for non-mutagenic chemicals. For chemicals that act via the mutagenic mode of action, adults will be evaluated as two age groups, 7-16 years and 16-26 years in accordance
with USEPA's Supplemental Guidance of Assessing Susceptibility from Early-Life Exposure to Carcinogens (USEPA, 2005).
Sources:
USEPA, 1989: Risk Assessment Guidance for Superfund. Vol 1: Human Health Evaluation Manual, Part A. EPA/540/1-86/060.
USEPA, 1993: Superfund Standard Default Exposure Factors for the Central Tendency and Reasonable Maximum Exposure.
USEPA, 2002: Calculating Upper Confidence Limits for Exposure Point Concentrations at Hazardous Waste Sites. OSWER 9285.6-10, December.
USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
USEPA, 2014: Human Health Evaluation Manual, Supplemental Guidance: Update of Standard Default Exposure Factors. OSWER 9200.1-120.
-------
RAGS Part D Table 5
Non-Cancer Toxicity Data
-------
LIST OF TABLES
RAGS PART D TABLE 5
NON-CANCER TOXICITY DATA
Table No.
5.1 Non-Cancer Toxicity Data - Oral/Dermal
5.2 Non-Cancer Toxicity Data - Inhalation
-------
TABLE 5.1
NON-CANCER TOXICITY DATA - ORAL/DERMAL
HUMAN HEALTH RISK ASSESSMENT REPORT
OLD WILMINGTON ROAD SITE
WEST CALN TOWNSHIP, CHESTER COUNTY, PENNSYLVANIA
PAGE 1 OF 2
Chemical
of Potential
Concern
Chronic/
Subchronic
Oral RfD
Oral Absorption
Efficiency
for Dermal'1'
Absorbed RfD for Dermal'2'
Primary
Target
Organ(s)
Combined
Uncertainty/Modifying
Factors
RfD:Target Organ(s)
Value
Units
Value
Units
Source(s)
Date(s)'3'
(MM/DD/YYYY)
Volatile Organic Compounds
1,2,4-Trimethylbenzene
Subchronic
4.0E-02
mg/kg/day
1
4.0E-02
mg/kg/day
Nervous
100
IRIS
5/11/2018
Chronic
1.0E-02
mg/kg/day
1
1.0E-02
mg/kg/day
Nervous
300
IRIS
5/11/2018
2-Butanone
Subchronic
2.0E+00
mg/kg/day
1
2.0E+00
mg/kg/day
Developmental
1000
HEAST
5/11/2018
Chronic
6.0E-01
mg/kg/day
1
6.0E-01
mg/kg/day
Developmental
1000
IRIS
5/11/2018
2-Hexanone
Chronic
5.0E-03
mg/kg/day
1
5.0E-03
mg/kg/day
Nervous
1000
IRIS
5/11/2018
Chloroform
Subchronic
1.0E-01
mg/kg/day
1
1.0E-01
mg/kg/day
Hepatic
100
ATSDR
9/1997
Chronic
1.0E-02
mg/kg/day
1
1.0E-02
mg/kg/day
Hepatic
100
IRIS
5/11/2018
cis-1,2-Dichloroethene
Subchronic
2.0E-02
mg/kg/day
1
2.0E-02
mg/kg/day
Urinary
300
PPRTV
5/11/2018
Chronic
2.0E-03
mg/kg/day
1
2.0E-03
mg/kg/day
Urinary
3000
IRIS
5/11/2018
Methyl Tert-Butyl Ether
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Tetrachloroethene
Subchronic
1.0E-01
mg/kg/day
1
1.0E-01
mg/kg/day
Hepatic
100
HEAST
5/11/2018
Chronic
6.0E-03
mg/kg/day
1
6.0E-03
mg/kg/day
Nervous, Ocular
1000
IRIS
5/11/2018
Trichloroethene
Chronic
5.0E-04
mg/kg/day
1
5.0E-04
mg/kg/day
Developmental, Immune
10- 1000
IRIS
5/11/2018
Vinyl Chloride
Chronic
3.0E-03
mg/kg/day
1
3.0E-03
mg/kg/day
Hepatic
30
IRIS
5/11/2018
Semivolatile Organic Compounds
1,4-Dioxane
Subchronic
5.0E-01
mg/kg/day
1
5.0E-01
mg/kg/day
Hepatic
100
ATSDR
4/2012
Chronic
3.0E-02
mg/kg/day
1
3.0E-02
mg/kg/day
Hepatic, Urinary
300
IRIS
5/11/2018
Benzo(a)pyrene
Chronic
3.0E-04
mg/kg/day
1
3.0E-04
mg/kg/day
Developmental, Reproductive, Immune
300- 1000
IRIS
5/11/2018
Bis(2-ethylhexyl)phthalate
Subchronic
1.0E-01
mg/kg/day
1
1.0E-01
mg/kg/day
Reproductive
100
ATSDR
9/2002
Chronic
2.0E-02
mg/kg/day
1
2.0E-02
mg/kg/day
Hepatic
1000
IRIS
5/11/2018
Caprolactam
Subchronic
5.0E-01
mg/kg/day
1
5.0E-01
mg/kg/day
Urinary
100
HEAST
5/11/2018
Chronic
5.0E-01
mg/kg/day
1
5.0E-01
mg/kg/day
Developmental
100
IRIS
5/11/2018
Naphthalene
Subchronic
6.0E-01
mg/kg/day
1
6.0E-01
mg/kg/day
Nervous
90
ATSDR
8/2005
Chronic
2.0E-02
mg/kg/day
1
2.0E-02
mg/kg/day
Body Weight
3000
IRIS
5/11/2018
Pesticides/PCBs
Dieldrin
Subchronic
1.0E-04
mg/kg/day
1
1.0E-04
mg/kg/day
Nervous System
100
ATSDR
9/2002
Chronic
5.0E-05
mg/kg/day
1
5.0E-05
mg/kg/day
Hepatic
100
IRIS
5/11/2018
Inorganics
Aluminum
Subchronic
1.0E+00
mg/kg/day
1
1.0E+00
mg/kg/day
Nervous System
30
ATSDR
9/2008
Chronic
1.0E+00
mg/kg/day
1
1.0E+00
mg/kg/day
Nervous System
100
PPRTV
10/23/2006
Antimony
Subchronic
4.0E-04
mg/kg/day
0.15
6.0E-05
mg/kg/day
Whole Body
1000
PPRTV
7/29/2008
Chronic
4.0E-04
mg/kg/day
0.15
6.0E-05
mg/kg/day
Hematologic
1000
IRIS
5/11/2018
Arsenic
Chronic
3.0E-04
mg/kg/day
1
3.0E-04
mg/kg/day
Cardiovascular System, Dermal
3
IRIS
5/11/2018
Barium
Subchronic
2.0E-01
mg/kg/day
0.07
1.4E-02
mg/kg/day
Urinary
300
ATSDR
8/2007
Chronic
2.0E-01
mg/kg/day
0.07
1.4E-02
mg/kg/day
Urinary
300
IRIS
5/11/2018
Beryllium
Subchronic
5.0E-03
mg/kg/day
0.007
3.5E-05
mg/kg/day
None Reported
100
HEAST
5/11/2018
Chronic
2.0E-03
mg/kg/day
0.007
1.4E-05
mg/kg/day
Gastrointestinal
300
IRIS
5/11/2018
Cadmium (soil)
Chronic
1.0E-03
mg/kg/day
0.025
2.5E-05
mg/kg/day
Urinary
10
IRIS
5/11/2018
Cadmium (water)
Chronic
5.0E-04
3.0E-03
mg/kg/day
0.05
2.5E-05
mg/kg/day
Urinary
10
300
IRIS
5/11/2018
Cobalt
Subchronic
mg/kg/day
1
3.0E-03
mg/kg/day
Thyroid
PPRTV
8/25/2008
Chronic
3.0E-04
mg/kg/day
1
3.0E-04
mg/kg/day
Thyroid
3000
PPRTV
8/25/2008
Copper
Chronic
4.0E-02
mg/kg/day
1
4.0E-02
mg/kg/day
Gastrointestinal System
NA
HEAST
5/11/2018
Iron
Subchronic
7.0E-01
mg/kg/day
1
7.0E-01
mg/kg/day
Gastrointestinal System
1.5
PPRTV
9/11/2006
Chronic
7.0E-01
mg/kg/day
1
7.0E-01
mg/kg/day
Gastrointestinal System
1.5
PPRTV
9/11/2006
-------
TABLE 5.1
NON-CANCER TOXICITY DATA - ORAL/DERMAL
HUMAN HEALTH RISK ASSESSMENT REPORT
OLD WILMINGTON ROAD SITE
WEST CALN TOWNSHIP, CHESTER COUNTY, PENNSYLVANIA
PAGE 2 OF 2
Chemical
of Potential
Concern
Chronic/
Subchronic
Oral RfD
Oral Absorption
Efficiency
for Dermal'1'
Absorbed RfD for Dermal'2'
Primary
Target
Organ(s)
Combined
Uncertainty/Modifying
Factors
RfD:Target Organ(s)
Value
Units
Value
Units
Source(s)
Date(s)'3'
(MM/DD/YYYY)
Lead
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Manganese141
Chronic
2.4E-02
mg/kg/day
0.04
9.6E-04
mg/kg/day
Nervous System
3
IRIS
5/11/2018
Mercury151
Subchronic
2.0E-03
mg/kg/day
0.07
1.4E-04
mg/kg/day
Urinary
100
ATSDR
3/1999
Chronic
3.0E-04
mg/kg/day
0.07
2.1E-05
mg/kg/day
Immune, Urinary
1000
IRIS
5/11/2018
Nickel
Subchronic
2.0E-02
mg/kg/day
0.04
8.0E-04
mg/kg/day
Body Weight
300
HEAST
5/11/2018
Chronic
2.0E-02
mg/kg/day
0.04
8.0E-04
mg/kg/day
Body Weight
300
IRIS
5/11/2018
Selenium
Subchronic
5.0E-03
mg/kg/day
1
5.0E-03
mg/kg/day
Body Weight
3
HEAST
5/11/2018
Chronic
5.0E-03
mg/kg/day
1
5.0E-03
mg/kg/day
Nervous, Hematologic, Dermal
3
IRIS
5/11/2018
Thallium
Subchronic
4.0E-05
mg/kg/day
1
4.0E-05
mg/kg/day
Dermal
1000
PPRTV-X
9/17/2012
Chronic
1.0E-05
mg/kg/day
1
1.0E-05
mg/kg/day
Dermal
3000
PPRTV-X
9/17/2012
Vanadium161
Subchronic
1.0E-02
mg/kg/day
0.026
2.6E-04
mg/kg/day
Urinary
10
ATSDR
9/2012
Chronic
5.0E-03
mg/kg/day
0.026
1.3E-04
mg/kg/day
Dermal
300
IRIS
5/11/2018
Zinc
Subchronic
3.0E-01
mg/kg/day
1
3.0E-01
mg/kg/day
Hematologic
3
ATSDR
8/2005
Chronic
3.0E-01
mg/kg/day
1
3.0E-01
mg/kg/day
Immune, Hematologic
3
IRIS
5/11/2018
Footnotes:
1 - U.S. EPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for
Dermal Risk Assessment) Final. EPA/540/R/99/005.
2 - Adjusted dermal RfD = Oral RfD x Oral Absorption Efficiency for Dermal.
3 - Dates for IRIS and HEAST are the date the databases were searched. The dates for ATSDR, PPRTV,
and Cal EPA are the dates of the reference documents containing the toxicity values.
4 - Adjusted IRIS value in accordance with IRIS.
5 - No value is available for elemental mercury, value presented is for mercuric chloride.
6 - Chronic value from IRIS adjusted as specified in the USEPA Regional Screening Level User Guide (November 2017).
Definitions:
ATSDR = Agency for Toxic Substances and Disease Registry.
HEAST = Health Effects Assessment Summary Tables
IRIS = Integrated Risk Information System
NA = Not Available.
PPRTV = Provisional Peer Reviewed Toxicity Value.
PPRTV-X = Appendix Provisional Peer Reviewed Toxicity Value.
-------
TABLE 5.2
NON-CANCER TOXICITY DATA - INHALATION
HUMAN HEALTH RISK ASSESSMENT REPORT
OLD WILMINGTON ROAD SITE
WEST CALN TOWNSHIP, CHESTER COUNTY, PENNSYLVANIA
PAGE 1 OF 2
Chemical
of Potential
Concern
Chronic/
Subchronic
Inhalation RfC
Primary
Target
Organ(s)
Combined
Uncertainty/Modifying
Factors
RfC : Target Organ(s)
Value
Units
Source(s)
Date(s)11'
(MM/DD/YYYY)
Volatile Organic Compounds
1,2,4-T rimethylbenzene
Subchronic
2.0E-01
mg/m3
Nervous
100
IRIS
5/11/2018
Chronic
6.0E-02
mg/m3
Nervous
300
IRIS
5/11/2018
2-Butanone
Chronic
5.0E+00
mg/m3
Developmental, Musculoskeletal
300
IRIS
5/11/2018
2-Hexanone
Chronic
3.0E-02
mg/m3
Nervous
3000
IRIS
5/11/2018
Chloroform
Subchronic
2.4E-01
mg/m3
Hepatic
300
ATSDR
9/1997
Chronic
9.8E-02
mg/m3
Hepatic
100
ATSDR
9/1997
cis-1,2-Dichloroethene
NA
NA
NA
NA
NA
NA
NA
Methyl Tert-Butyl Ether
Chronic
3.0E+00
mg/m3
Hepatic, Urinary, Ocular
100
IRIS
5/11/2018
Tetrachloroethene
Chronic
4.0E-02
mg/m3
Nervous System, Ocular
1000
IRIS
5/11/2018
Trichloroethene
Chronic
2.0E-03
mg/m3
Developmental, Immune
10-100
IRIS
5/11/2018
Vinyl Chloride
Chronic
1.0E-01
mg/m3
Hepatic
30
IRIS
5/11/2018
Semivolatile Organic Compounds
1,4-Dioxane
Subchronic
7.2E-01
mg/m3
Respiratory System
30
ATSDR
4/2012
Chronic
3.0E-02
mg/m3
Nervous System, Respiratory
1000
IRIS
5/11/2018
Benzo(a)pyrene
Chronic
2.0E-06
mg/m3
Developmental, Reproductive
3000
IRIS
5/11/2018
Bis(2-ethylhexyl)phthalate
NA
NA
NA
NA
NA
NA
NA
Caprolactam
Chronic
2.2E-03
mg/m3
Respiratory System
NA
Cal EPA
10/2013
Naphthalene
Chronic
3.0E-03
mg/m3
Nervous System, Respiratory
3000
IRIS
5/11/2018
Pesticides/PCBs
Dieldrin
NA
NA
NA
NA
NA
NA
NA
Inorganics
Aluminum
Chronic
5.0E-03
mg/m3
Nervous System
300
PPRTV
10/23/2006
Antimony
NA
NA
NA
NA
NA
NA
NA
Arsenic
Chronic
1.5E-Q5
mg/m3
NA
NA
Cal EPA
12/2008
Barium
Subchronic
5.0E-03
mg/m3
Developmental
100
HE AST
5/11/2018
Chronic
5.0E-04
mg/m3
Developmental
1000
HE AST
5/11/2018
Beryllium
Chronic
2.0E-05
mg/m3
Immune, Respiratory
10
IRIS
5/11/2018
Cadmium
Chronic
1.0E-05
mg/m3
Urinary
9
ATSDR
9/2012
Cobalt
Subchronic
2.0E-05
mg/m3
Respiratory System
100
PPRTV
8/25/2008
Chronic
6.0E-06
mg/m
Respiratory System
300
PPRTV
8/25/2008
-------
TABLE 5.2
NON-CANCER TOXICITY DATA - INHALATION
HUMAN HEALTH RISK ASSESSMENT REPORT
OLD WILMINGTON ROAD SITE
WEST CALN TOWNSHIP, CHESTER COUNTY, PENNSYLVANIA
PAGE 2 OF 2
Chemical
of Potential
Concern
Chronic/
Subchronic
Inhalation RfC
Primary
Target
Organ(s)
Combined
Uncertainty/Modifying
Factors
RfC : Target Organ(s)
Value
Units
Source(s)
Date(s)11'
(MM/DD/YYYY)
Copper
NA
NA
NA
NA
NA
NA
NA
Iron
NA
NA
NA
NA
NA
NA
NA
Lead
NA
NA
NA
NA
NA
NA
NA
Manganese
Chronic
5.0E-05
mg/m
Nervous System
1000
IRIS
5/11/2018
Mercury
Subchronic
3.0E-04
mg/m3
Nervous System
30
HEAST
5/11/2018
Chronic
3.0E-04
mg/m3
Nervous System
30
IRIS
5/11/2018
Nickel
Subchronic
2.0E-04
mg/m3
Respiratory System
30
ATSDR
8/2005
Chronic
9.0E-05
mg/m3
Respiratory System
30
ATSDR
8/2005
Selenium
Chronic
2.0E-02
mg/m3
Respiratory System
NA
Cal EPA
12/2008
Thallium
NA
NA
NA
NA
NA
NA
NA
Vanadium
Chronic
1 .OE-04
mg/m3
Respiratory
30
ATSDR
9/2012
Zinc
NA
NA
NA
NA
NA
NA
NA
Footnotes:
1 - Dates for IRIS and HEAST are the date the databases were searched. The dates for ATSDR, PPRTV, and Cal EPA are the dates of the reference documents containing the toxicity values.
Definitions:
ATSDR = Agency for Toxic Substances and Disease Registry.
Cal EPA, 2008 = Technical Support Document for Noncancer RELs.
Cal EPA, 2013 = Reference Exposure Levels for Caprolactam.
HEAST = Health Effects Assessment Summary Table
IRIS = Integrated Risk Information System
NA = Not Applicable
PPRTV = Provisional Peer Reviewed Toxicity Value.
-------
RAGS Part D Table 6
Cancer Toxicity Data
-------
LIST OF TABLES
RAGS PART D TABLE 6
CANCER TOXICITY DATA
Table No.
6 1 Cancer Toxicity Data - Oral/Dermal
6 2 Cancer Toxicity Data - Inhalation
-------
TABLE 6.1
CANCER TOXICITY DATA - ORAL/DERMAL
HUMAN HEALTH RISK ASSESSMENT REPORT
OLD WILMINGTON ROAD SITE
WEST CALN TOWNSHIP, CHESTER COUNTY, PENNSYLVANIA
PAGE 1 OF 2
Chemical
Oral Cancer Slope Factor
Oral Absorption
Absorbed Cancer Slope Factor
Weight of Evidence/
Oral CSF
of Potential
Efficiency
for Dermal*2*
Cancer Guideline
Concern
Value
Units
for Dermal*1*
Value
Units
Description*3*
Source(s)
Date(s)(4)
(MSWDD/YYYY)
Volatile Organic Compounds
1,2,4-T rimethy Ibenzene
NA
NA
NA
NA
NA
Inadequate information to assess carcinogenic
potential
IRIS
5/11/2018
2-Butanone
NA
NA
NA
NA
NA
Data are inadequate for an assessment of
human carcinogenic potential
IRIS
5/11/2018
2-Hexanone
NA
NA
NA
NA
NA
Inadequate information to assess carcinogenic
potential
IRIS
5/11/2018
Chloroform
3.1E-02
(mg/kg/day)"1
1
3.1E-02
(mg/kg/day)"1
Likely to be carcinogenic to humans
Cal EPA
6/2009
cis-1,2-Dichloroethene
NA
NA
NA
NA
NA
Inadequate information to assess carcinogenic
potential
IRIS
5/11/2018
Methyl Tert-Butyl Ether
1.8E-03
(mg/kg/day)"1
1
1.8E-03
(mg/kg/day)"1
NA
Cal EPA
6/2009
Tetrachloroethene
2.1E-03
(mg/kg/day)"1
1
2.1E-03
(mg/kg/day)"1
Likely to be carcinogenic to humans
IRIS
5/11/2018
Trichloroethene (Mutagenic)'5'
9.3E-03
(mg/kg/day)-1
1
9.3E-03
(mg/kg/day)"1
Carcinogenic to humans
IRIS
5/11/2018
Trichloroethene (Nonmutagenic)
3.7E-02
(mg/kg/day)"1
1
3.7E-02
(mg/kg/day)"1
Carcinogenic to humans
IRIS
5/11/2018
Vinyl Chloride
7.2E-01
(mg/kg/day)"1
1
7.2E-01
(mg/kg/day)"1
Known/likely human carcinogen
IRIS
5/11/2018
Semivolatile Organic Compounds
1,4-Dioxane
1.0E-01
(mg/kg/day)"1
1
1.0E-01
(mg/kg/day)"1
Likely to be carcinogenic to humans
IRIS
5/11/2018
Benzo(a)pyrene(5)
1.0E+00
(mg/kg/day)"1
1
1.0E+00
(mg/kg/day)"1
Carcinogenic to humans
IRIS
5/11/2018
Bis(2-ethylhexyl)phthalate
1.4E-02
(mg/kg/day)"1
1
1.4E-02
(mg/kg/day)"1
B2 (Probable human carcinogen)
IRIS
5/11/2018
Caprolactam
NA
NA
NA
NA
NA
NA
NA
NA
Naphthalene
NA
NA
NA
NA
NA
Carcinogenic potential cannot be determined
IRIS
5/11/2018
Pesticides/PCBs
Dieldrin
1.6E+01
(mg/kg/day)"1
1
1.6E+01
(mg/kg/day)"1
B2 (Probable human carcinogen)
IRIS
5/11/2018
Inorganics
Aluminum
NA
NA
NA
NA
NA
NA
NA
NA
Antimony
NA
NA
NA
NA
NA
NA
NA
NA
Arsenic
1.5E+00
(mg/kg/day)"1
1
1.5E+00
(mg/kg/day)"1
A (human carcinogen)
IRIS
5/11/2018
Barium
NA
NA
NA
NA
NA
Not likely to be carcinogenic to humans
IRIS
5/11/2018
Beryllium
NA
NA
NA
NA
NA
Carcinogenic potential cannot be determined
IRIS
5/11/2018
Cadmium
NA
NA
NA
NA
NA
B1 (Probable human carcinogen)
IRIS
5/11/2018
Cobalt
NA
NA
NA
NA
NA
NA
NA
NA
Copper
NA
NA
NA
NA
NA
D (Not classifiable as to human
carcinogenicity)
IRIS
5/11/2018
Iron
NA
NA
NA
NA
NA
NA
NA
NA
Lead
NA
NA
NA
NA
NA
B2 (Probable human carcinogen)
IRIS
5/11/2018
-------
TABLE 6.1
CANCER TOXICITY DATA - ORAL/DERMAL
HUMAN HEALTH RISK ASSESSMENT REPORT
OLD WILMINGTON ROAD SITE
WEST CALN TOWNSHIP, CHESTER COUNTY, PENNSYLVANIA
PAGE 2 OF 2
Chemical
of Potential
Concern
Oral Cancer Slope Factor
Oral Absorption
Efficiency
for Dermal*1*
Absorbed Cancer Slope Factor
for Dermal*2*
Weight of Evidence/
Cancer Guideline
Description*3*
Oral CSF
Value
Units
Value
Units
Source(s)
Date(s)<4)
(MSWDD/YYYY)
Manganese
NA
NA
NA
NA
NA
D (Not classifiable as to human
carcinogenicity)
IRIS
5/11/2018
Mercury
NA
NA
NA
NA
NA
D (Not classifiable as to human
carcinogenicity)
IRIS
5/11/2018
Nickel
NA
NA
NA
NA
NA
NA
NA
NA
Selenium
NA
NA
NA
NA
NA
D (Not classifiable as to human
carcinogenicity)
IRIS
5/11/2018
Thallium
NA
NA
NA
NA
NA
Inadequate information to assess carcinogenic
potential
IRIS
5/11/2018
Vanadium
NA
NA
NA
NA
NA
NA
NA
NA
Zinc
NA
NA
NA
NA
NA
Inadequate information to assess carcinogenic
potential
IRIS
5/11/2018
Footnotes:
1 - USEPA, 2004: Risk Assessment Guidance for Superfund (Part E, Supplemental Guidance for Dermal Risk Assessment) Final. EPA/540/R/99/005.
2 - Weight of evidence description is the most recent one presented in IRIS.
3 - Adjusted cancer slope factor for dermal = Oral cancer slope factor / Oral absorption efficiency for dermal.
4 - Dates for IRIS are the date the databases was searched. The dates for Cal EPA are the dates of the reference documents containing the toxicity values.
5 - Trichloroethene, benzo(a)pyrene, and hexavalent chromium are considered to act via the mutagenic mode of action. These chemicals are evaluated in accordance with USEPA's
for Assessing Susceptibility from Early-Life Exposure to Carcinogens (March 2005).
Definitions:
Cal EPA = California Environmental Protection Agency.
IRIS = Integrated Risk Information System.
NA = Not Available.
-------
TABLE 6.2
CANCER TOXICITY DATA - INHALATION
HUMAN HEALTH RISK ASSESSMENT REPORT
OLD WILMINGTON ROAD SITE
WEST CALN TOWNSHIP, CHESTER COUNTY, PENNSYLVANIA
PAGE 1 OF 2
Chemical
Unit Risk
Weight of Evidence/
Unit Risk : Inhalation CSF
of Potential
Cancer Guideline
Concern
Value
Units
Description11'
Source(s)
Date(s)'2'
(MM/DD/YYYY)
Volatile Organic Compounds
1,2,4-T rimethylbenzene
NA
NA
Inadequate information to assess
carcinogenic potential
IRIS
5/11/2018
2-Butanone
NA
NA
Data are inadequate for an assessment of
human carcinogenic potential
IRIS
5/11/2018
2-Hexanone
NA
NA
Inadequate information to assess
carcinogenic potential
IRIS
5/11/2018
Chloroform
2.3E-05
(ug/m3)"1
Likely to be carcinogenic to humans
IRIS
5/11/2018
cis-1,2-Dichloroethene
NA
NA
Inadequate information to assess
carcinogenic potential
IRIS
5/11/2018
Methyl Tert-Butyl Ether
2.6E-07
(ug/m3)"1
NA
Cal EPA
6/2009
Tetrachloroethene
2.6E-07
(ug/m3)"1
Likely to be carcinogenic to humans
IRIS
5/11/2018
Trichloroethene (Mutagenic)'3'
1.0E-06
(ug/m3)"1
Carcinogenic to humans
IRIS
5/11/2018
Trichloroethene (Nonmutagenic)
3.1E-06
(ug/m3)"1
Carcinogenic to humans
IRIS
5/11/2018
Vinyl Chloride
4.4E-06
(ug/m3)"1
Known/likely human carcinogen
IRIS
5/11/2018
Semivolatile Organic Compounds
1,4-Dioxane
5.0E-06
(ug/m3)"1
Likely to be carcinogenic to humans
IRIS
5/11/2018
Benzo(a)pyrene(3)
6.0E-04
(ug/m3)"1
Carcinogenic to humans
IRIS
5/11/2018
Bis(2-ethylhexyl)phthalate
2.4E-06
(ug/m3)"1
B2 (Probable human carcinogen)
Cal EPA
6/2009
Caprolactam
NA
NA
NA
NA
NA
Naphthalene
3.4E-05
(ug/m3)"1
Carcinogenic potential cannot be
determined
Cal EPA
6/2009
Pesticides/PCBs
Dieldrin
4.6E-03
(ug/m3)"1
B2 (Probable human carcinogen)
IRIS
5/11/2018
Inorganics
Aluminum
NA
NA
NA
NA
NA
Antimony
NA
NA
NA
NA
NA
Arsenic
4.3E-03
(ug/m3)"1
A (Known human carcinogen)
IRIS
5/11/2018
Barium
NA
NA
Carcinogenic potential cannot be
determined
IRIS
5/11/2018
-------
TABLE 6.2
CANCER TOXICITY DATA - INHALATION
HUMAN HEALTH RISK ASSESSMENT REPORT
OLD WILMINGTON ROAD SITE
WEST CALN TOWNSHIP, CHESTER COUNTY, PENNSYLVANIA
PAGE 2 OF 2
Chemical
of Potential
Concern
Unit Risk
Weight of Evidence/
Cancer Guideline
Description11'
Unit Risk : Inhalation CSF
Value
Units
Source(s)
Date(s)12'
(MM/DD/YYYY)
Beryllium
2.4E-03
(ug/m3)"1
Known/likely human carcinogen
IRIS
5/11/2018
Cadmium
1.8E-03
(ug/m3)"1
B1 (Probable human carcinogen)
IRIS
5/11/2018
Cobalt
9.0E-03
(ug/m3)"1
NA
PPRTV
8/25/2008
Copper
NA
NA
D (Not classifiable as to human
carcinogenicity)
IRIS
5/11/2018
Iron
NA
NA
NA
NA
NA
Lead
NA
NA
B2 (Probable human carcinogen)
IRIS
5/11/2018
Manganese
NA
NA
D (Not classifiable as to human
carcinogenicity)
IRIS
5/11/2018
Mercury
NA
NA
D (Not classifiable as to human
carcinogenicity)
IRIS
5/11/2018
Nickel
2.6E-04
(ug/m3)"1
NA
Cal EPA
6/2009
Selenium
NA
NA
D (Not classifiable as to human
carcinogenicity)
IRIS
5/11/2018
Thallium
NA
NA
Inadequate information to assess
carcinogenic potential
IRIS
5/11/2018
Vanadium
NA
NA
NA
NA
NA
Zinc
NA
NA
Inadequate information to assess
carcinogenic potential
IRIS
5/11/2018
Footnotes:
1 - Weight of evidence description is the most recent one presented in IRIS.
2 - Dates for IRIS and PPRTV are the dates the databases were searched. The dates for Cal EPA is the date of the reference document containing the toxicity values
3 - Trichloroethene, benzo(a)pyrene, and hexavalent chromium are considered to act via the mutagenic mode of action. These chemicals are evaluated in accordanc
Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (March 2005).
Definitions:
Cal EPA = California Environmental Protection Agency, Technical Support Document for Cancer Potency Factors, 2009.
IRIS = Integrated Risk Information System.
NA = Not Available.
PPRTV = Provisional Peer Reviewed Toxicity Value.
-------
RAGS Part D Table 7
Calculation of Cancer Risks and Non-Cancer Hazards
-------
LIST OF TABLES
RAGS PART D TABLE 7
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
Table No.
Reasonable Maximum Exposuri
7.1 .RME Current Industrial Workers
7.2.RME Current Child Residents
7.3.RME Current Adult Residents
7.4.RME Current Lifelong Residents
7.5.RME Future Construction Workers
7.6.RME Future Industrial Workers
7.7.RME Future Child Residents
7.8.RME Future Adult Residents
7.9.RME Future Lifelong Residents
Central Tendency Exposures
7
1
o
—I
m
Current Industrial Workers
7
2
o
—i
m
Current Child Residents
7
3
o
—i
m
Current Adult Residents
7
4
o
—i
m
Current Lifelong Residents
7
5
o
—i
m
Future Construction Workers
7
6
o
—i
m
Future Industrial Workers
7
7
o
—i
m
Future Child Residents
7
8
o
—i
m
Future Adult Residents
7
9
o
—i
m
Future Lifelong Residents
-------
TABLE 7.1.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Current
Receptor Population: Industrial Workers
Receptor Age: Adult
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Surface Soil
Surface Soil
OWR
Ingestion
Benzo(a)pyrene
0.286
mg/kg
8.7E-08
(mg/kg/day)
1.0E+00
(mg/kg/day)"
8.7E-08
2.4E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00082
Naphthalene
9.8
mg/kg
3.0E-06
(mg/kg/day)
NA
(mg/kg/day)"
8.4E-06
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.00042
Dieldrin
0.11
mg/kg
3.4E-08
(mg/kg/day)
1.6E+01
(mg/kg/day)"
5.4E-07
9.4E-08
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.0019
Aluminum
12000
mg/kg
3.7E-03
(mg/kg/day)
NA
(mg/kg/day)"
1.0E-02
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.010
Antimony
11.3
mg/kg
3.5E-06
(mg/kg/day)
NA
(mg/kg/day)"
9.7E-06
(mg/kg/day)
4.0E-04
(mg/kg/day)
0.024
Arsenic
5.28
mg/kg
9.7E-07
(mg/kg/day)
1.5E+00
(mg/kg/day)"
1.5E-06
2.7E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0090
Cobalt
7.59
mg/kg
2.3E-06
(mg/kg/day)
NA
(mg/kg/day)"
6.5E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.022
Copper
1240
mg/kg
3.8E-04
(mg/kg/day)
NA
(mg/kg/day)"
1.1E-03
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.027
Iron
20200
mg/kg
6.2E-03
(mg/kg/day)
NA
(mg/kg/day)"
1.7E-02
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.025
Lead
131
mg/kg
4.0E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.1E-04
(mg/kg/day)
NA
(mg/kg/day)
Manganese
456
mg/kg
1.4E-04
(mg/kg/day)
NA
(mg/kg/day)"
3.9E-04
(mg/kg/day)
2.4E-02
(mg/kg/day)
0.016
Vanadium
27
mg/kg
8.3E-06
(mg/kg/day)
NA
(mg/kg/day)"
2.3E-05
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.0046
Zinc
705
mg/kg
2.2E-04
(mg/kg/day)
NA
(mg/kg/day)"
6.0E-04
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.0020
Exp. Route Total
2.1E-06
0.14
Dermal
Benzo(a)pyrene
0.286
mg/kg
4.8E-08
(mg/kg/day)
1.0E+00
(mg/kg/day)"
4.8E-08
1.3E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00045
Naphthalene
9.8
mg/kg
1.6E-06
(mg/kg/day)
NA
(mg/kg/day)"
4.6E-06
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.00023
Dieldrin
0.11
mg/kg
1.4E-08
(mg/kg/day)
1.6E+01
(mg/kg/day)"
2.3E-07
4.0E-08
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.00080
Aluminum
12000
mg/kg
1.6E-04
(mg/kg/day)
NA
(mg/kg/day)"
4.3E-04
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.00043
Antimony
11.3
mg/kg
1.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
4.1E-07
(mg/kg/day)
6.0E-05
(mg/kg/day)
0.0068
Arsenic
5.28
mg/kg
2.0E-07
(mg/kg/day)
1.5E+00
(mg/kg/day)"
3.1E-07
5.7E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0019
Cobalt
7.59
mg/kg
9.8E-08
(mg/kg/day)
NA
(mg/kg/day)"
2.8E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00092
Copper
1240
mg/kg
1.6E-05
(mg/kg/day)
NA
(mg/kg/day)"
4.5E-05
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.0011
Iron
20200
mg/kg
2.6E-04
(mg/kg/day)
NA
(mg/kg/day)"
7.3E-04
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.0010
Lead
131
mg/kg
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)"
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)
Manganese
456
mg/kg
5.9E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.7E-05
(mg/kg/day)
9.6E-04
(mg/kg/day)
0.017
Vanadium
27
mg/kg
3.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
9.8E-07
(mg/kg/day)
1.3E-04
(mg/kg/day)
0.0075
Zinc
705
mg/kg
9.1E-06
(mg/kg/day)
NA
(mg/kg/day)"
2.6E-05
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.000085
Exp. Route Total
5.8E-07
0.039
Exposure Point Total
2.7E-06
0.18
Exposure Medium Total
2.7E-06
0.18
Air
OWR
Inhalation
Benzo(a)pyrene
8.8E-11
mg/m3
7.2E-12
(mg/m3)
6.0E-04
(ug/m3)"1
4.3E-12
2.0E-11
(mg/m3)
2.0E-06
(mg/m3)
0.000010
Naphthalene
1.7E-04
mg/m3
1.3E-05
(mg/m3)
3.4E-05
(ug/m3)"1
4.6E-07
3.8E-05
(mg/m3)
3.0E-03
(mg/m3)
0.013
Dieldrin
3.4E-11
mg/m3
2.8E-12
(mg/m3)
4.6E-03
(ug/m3)"1
1.3E-11
7.8E-12
(mg/m3)
NA
(mg/m3)
Aluminum
3.7E-06
mg/m
3.0E-07
(mg/m3)
NA
(ug/m3)"1
8.5E-07
(mg/m3)
5.0E-03
(mg/m3)
0.00017
Antimony
3.5E-09
mg/m3
2.8E-10
(mg/m3)
NA
(ug/m3)"1
8.0E-10
(mg/m3)
NA
(mg/m3)
Arsenic
1.6E-09
mg/m3
1.3E-10
(mg/m3)
4.3E-03
(ug/m3)"1
5.7E-10
3.7E-10
(mg/m3)
1.5E-05
(mg/m3)
0.000025
Cobalt
2.3E-09
mg/m3
1.9E-10
(mg/m3)
9.0E-03
(ug/m3)"1
1.7E-09
5.3E-10
(mg/m3)
6.0E-06
(mg/m3)
0.000089
Copper
3.8E-07
mg/m3
3.1E-08
(mg/m3)
NA
(ug/m3)"1
8.7E-08
(mg/m3)
NA
(mg/m3)
Iron
6.2E-06
mg/m3
5.1E-07
(mg/m3)
NA
(ug/m3)"1
1.4E-06
(mg/m3)
NA
(mg/m3)
Lead
4.0E-08
mg/m3
3.3E-09
(mg/m3)
NA
(ug/m3)"1
9.2E-09
(mg/m3)
NA
(mg/m3)
Manganese
1.4E-07
mg/m3
1.1E-08
(mg/m3)
NA
(ug/m3)"1
3.2E-08
(mg/m3)
5.0E-05
(mg/m3)
0.00064
Vanadium
8.3E-09
mg/m3
6.8E-10
(mg/m3)
NA
(ug/m3)"1
1.9E-09
(mg/m3)
1.0E-04
(mg/m3)
0.000019
Zinc
2.2E-07
mg/m3
1.8E-08
(mg/m3)
NA
(ug/m3)"1
5.0E-08
(mg/m3)
NA
(mg/m3)
Exp. Route Total
4.6E-07
0.014
Exposure Point Total
4.6E-07
0.014
Exposure Medium Total
4.6E-07
0.014
Medium Total
3.1E-06
0.19
Total of Receptor Risks Across All Media
3.1E-06
Total of Receptor Hazards Across All Media
0.19
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 7.2.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 2
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Child
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Surface Soil
Surface Soil
OWR
Ingestion
Benzo(a)pyrene
0.286
mg/kg
1.7E-06
(mg/kg/day)
1.0E+00
(mg/kg/day)"
1.7E-06
3.7E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.012
Naphthalene
9.8
mg/kg
1.1E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.3E-04
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.0063
Dieldrin
0.11
mg/kg
1.2E-07
(mg/kg/day)
1.6E+01
(mg/kg/day)"
1.9E-06
1.4E-06
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.028
Aluminum
12000
mg/kg
1.3E-02
(mg/kg/day)
NA
(mg/kg/day)"
1.5E-01
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.15
Antimony
11.3
mg/kg
1.2E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.4E-04
(mg/kg/day)
4.0E-04
(mg/kg/day)
0.36
Arsenic
5.28
mg/kg
3.5E-06
(mg/kg/day)
1.5E+00
(mg/kg/day)"
5.2E-06
4.1E-05
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.14
Cobalt
7.59
mg/kg
8.3E-06
(mg/kg/day)
NA
(mg/kg/day)"
9.7E-05
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.32
Copper
1240
mg/kg
1.4E-03
(mg/kg/day)
NA
(mg/kg/day)"
1.6E-02
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.40
Iron
20200
mg/kg
2.2E-02
(mg/kg/day)
NA
(mg/kg/day)"
2.6E-01
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.37
Lead
131
mg/kg
1.4E-04
(mg/kg/day)
NA
(mg/kg/day)"
1.7E-03
(mg/kg/day)
NA
(mg/kg/day)
Manganese
456
mg/kg
5.0E-04
(mg/kg/day)
NA
(mg/kg/day)"
5.8E-03
(mg/kg/day)
2.4E-02
(mg/kg/day)
0.24
Vanadium
27
mg/kg
3.0E-05
(mg/kg/day)
NA
(mg/kg/day)"
3.5E-04
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.069
Zinc
705
mg/kg
7.7E-04
(mg/kg/day)
NA
(mg/kg/day)"
9.0E-03
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.030
Exp. Route Total
8.8E-06
2.1
Dermal
Benzo(a)pyrene
0.286
mg/kg
5.2E-07
(mg/kg/day)
1.0E+00
(mg/kg/day)"
5.2E-07
1.1E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0038
Naphthalene
9.8
mg/kg
3.3E-06
(mg/kg/day)
NA
(mg/kg/day)"
3.9E-05
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.0019
Dieldrin
0.11
mg/kg
2.9E-08
(mg/kg/day)
1.6E+01
(mg/kg/day)"
4.6E-07
3.3E-07
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.0067
Aluminum
12000
mg/kg
3.1E-04
(mg/kg/day)
NA
(mg/kg/day)"
3.6E-03
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.0036
Antimony
11.3
mg/kg
2.9E-07
(mg/kg/day)
NA
(mg/kg/day)"
3.4E-06
(mg/kg/day)
6.0E-05
(mg/kg/day)
0.057
Arsenic
5.28
mg/kg
4.1E-07
(mg/kg/day)
1.5E+00
(mg/kg/day)"
6.2E-07
4.8E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.016
Cobalt
7.59
mg/kg
2.0E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.3E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0077
Copper
1240
mg/kg
3.2E-05
(mg/kg/day)
NA
(mg/kg/day)"
3.8E-04
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.0094
Iron
20200
mg/kg
5.3E-04
(mg/kg/day)
NA
(mg/kg/day)"
6.1E-03
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.0088
Lead
131
mg/kg
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)"
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)
Manganese
456
mg/kg
1.2E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.4E-04
(mg/kg/day)
9.6E-04
(mg/kg/day)
0.14
Vanadium
27
mg/kg
7.0E-07
(mg/kg/day)
NA
(mg/kg/day)"
8.2E-06
(mg/kg/day)
1.3E-04
(mg/kg/day)
0.063
Zinc
705
mg/kg
1.8E-05
(mg/kg/day)
NA
(mg/kg/day)"
2.1E-04
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.00071
Exp. Route Total
1.6E-06
0.32
Exposure Point Total
1.0E-05
2.4
Exposure Medium Total
1.0E-05
2.4
Air
OWR
Inhalation
Benzo(a)pyrene
8.8E-11
mg/m3
3.9E-11
(mg/m3)
6.0E-04
(ug/m3)"1
2.3E-11
8.5E-11
(mg/m3)
2.0E-06
(mg/m3)
0.000042
Naphthalene
1.7E-04
mg/m3
1.4E-05
(mg/m3)
3.4E-05
(ug/m3)"1
4.6E-07
1.6E-04
(mg/m3)
3.0E-03
(mg/m3)
0.053
Dieldrin
3.4E-11
mg/m3
2.8E-12
(mg/m3)
4.6E-03
(ug/m3)"1
1.3E-11
3.3E-11
(mg/m3)
NA
(mg/m3)
Aluminum
3.7E-06
mg/m
3.0E-07
(mg/m3)
NA
(ug/m3)"1
3.6E-06
(mg/m3)
5.0E-03
(mg/m3)
0.00071
Antimony
3.5E-09
mg/m3
2.9E-10
(mg/m3)
NA
(ug/m3)"1
3.3E-09
(mg/m3)
NA
(mg/m3)
Arsenic
1.6E-09
mg/m3
1.3E-10
(mg/m3)
4.3E-03
(ug/m3)"1
5.8E-10
1.6E-09
(mg/m3)
1.5E-05
(mg/m3)
0.00010
Cobalt
2.3E-09
mg/m3
1.9E-10
(mg/m3)
9.0E-03
(ug/m3)"1
1.7E-09
2.2E-09
(mg/m3)
6.0E-06
(mg/m3)
0.00037
Copper
3.8E-07
mg/m3
3.1E-08
(mg/m3)
NA
(ug/m3)"1
3.7E-07
(mg/m3)
NA
(mg/m3)
Iron
6.2E-06
mg/m3
5.1E-07
(mg/m3)
NA
(ug/m3)"1
6.0E-06
(mg/m3)
NA
(mg/m3)
Lead
4.0E-08
mg/m3
3.3E-09
(mg/m3)
NA
(ug/m3)"1
3.9E-08
(mg/m3)
NA
(mg/m3)
Manganese
1.4E-07
mg/m3
1.2E-08
(mg/m3)
NA
(ug/m3)"1
1.3E-07
(mg/m3)
5.0E-05
(mg/m3)
0.0027
Vanadium
8.3E-09
mg/m3
6.8E-10
(mg/m3)
NA
(ug/m3)"1
8.0E-09
(mg/m3)
1.0E-04
(mg/m3)
0.000080
Zinc
2.2E-07
mg/m3
1.8E-08
(mg/m3)
NA
(ug/m3)"1
2.1E-07
(mg/m3)
NA
(mg/m3)
Exp. Route Total
4.6E-07
0.057
Exposure Point Total
4.6E-07
0.057
Exposure Medium Total
4.6E-07
0.057
Medium Total
1.1E-05
2.5
-------
TABLE 7.2.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 2
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Child
Medium
Exposure Medium
Exposure Point
Exposure Route Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
|
Value
Units
Value
Units
Value
Units
Value
Units
Sediment
Sediment
OWR
Ingestion Cobalt
14
mg/kg
2.3E-06
(mg/kg/day)
NA
(mg/kg/day)"1
2.7E-05
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.09
[Nickel
1500
mg/kg
2.4E-04
(mg/kg/day)
NA
(mg/kg/day)"1
2.8E-03
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.14
I Exp. Route Total |
0.23
Dermal jCobalt
14
mg/kg
5.4E-08
(mg/kg/day)
NA
(mg/kg/day)"1
6.3E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00
| Nickel
1500
mg/kg
5.8E-06
(mg/kg/day)
NA
(mg/kg/day)"1
6.8E-05
(mg/kg/day)
8.0E-04
(mg/kg/day)
0.085
Exp. Route Total jj
0.09
Exposure Point Total
0.32
Exposure Medium Total
0.32
Medium Total
0.32
Total of Receptor Risks Across All Media
1.1E-05
Total of Receptor Hazards Across All Media
2.8
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 7.3.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 2
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Adult
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Surface Soil
Surface Soil
OWR
Ingestion
Benzo(a)pyrene
0.286
mg/kg
2.0E-07
(mg/kg/day)
1.0E+00
(mg/kg/day)"
2.0E-07
3.4E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0011
Naphthalene
9.8
mg/kg
3.4E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.2E-05
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.00059
Dieldrin
0.11
mg/kg
3.8E-08
(mg/kg/day)
1.6E+01
(mg/kg/day)"
6.0E-07
1.3E-07
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.0026
Aluminum
12000
mg/kg
4.1E-03
(mg/kg/day)
NA
(mg/kg/day)"
1.4E-02
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.014
Antimony
11.3
mg/kg
3.9E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.4E-05
(mg/kg/day)
4.0E-04
(mg/kg/day)
0.034
Arsenic
5.28
mg/kg
1.1E-06
(mg/kg/day)
1.5E+00
(mg/kg/day)"
1.6E-06
3.8E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.013
Cobalt
7.59
mg/kg
2.6E-06
(mg/kg/day)
NA
(mg/kg/day)"
9.1E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.030
Copper
1240
mg/kg
4.2E-04
(mg/kg/day)
NA
(mg/kg/day)"
1.5E-03
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.037
Iron
20200
mg/kg
6.9E-03
(mg/kg/day)
NA
(mg/kg/day)"
2.4E-02
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.035
Lead
131
mg/kg
4.5E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.6E-04
(mg/kg/day)
NA
(mg/kg/day)
Manganese
456
mg/kg
1.6E-04
(mg/kg/day)
NA
(mg/kg/day)"
5.5E-04
(mg/kg/day)
2.4E-02
(mg/kg/day)
0.023
Vanadium
27
mg/kg
9.2E-06
(mg/kg/day)
NA
(mg/kg/day)"
3.2E-05
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.0065
Zinc
705
mg/kg
2.4E-04
(mg/kg/day)
NA
(mg/kg/day)"
8.5E-04
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.0028
Exp. Route Total
2.4E-06
0.20
Dermal
Benzo(a)pyrene
0.286
mg/kg
1.1E-07
(mg/kg/day)
1.0E+00
(mg/kg/day)"
1.1E-07
1.9E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00063
Naphthalene
9.8
mg/kg
1.8E-06
(mg/kg/day)
NA
(mg/kg/day)"
6.4E-06
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.00032
Dieldrin
0.11
mg/kg
1.6E-08
(mg/kg/day)
1.6E+01
(mg/kg/day)"
2.5E-07
5.6E-08
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.0011
Aluminum
12000
mg/kg
1.7E-04
(mg/kg/day)
NA
(mg/kg/day)"
6.1E-04
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.00061
Antimony
11.3
mg/kg
1.6E-07
(mg/kg/day)
NA
(mg/kg/day)"
5.7E-07
(mg/kg/day)
6.0E-05
(mg/kg/day)
0.0095
Arsenic
5.28
mg/kg
2.3E-07
(mg/kg/day)
1.5E+00
(mg/kg/day)"
3.4E-07
8.0E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0027
Cobalt
7.59
mg/kg
1.1E-07
(mg/kg/day)
NA
(mg/kg/day)"
3.8E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0013
Copper
1240
mg/kg
1.8E-05
(mg/kg/day)
NA
(mg/kg/day)"
6.3E-05
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.0016
Iron
20200
mg/kg
2.9E-04
(mg/kg/day)
NA
(mg/kg/day)"
1.0E-03
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.0015
Lead
131
mg/kg
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)"
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)
Manganese
456
mg/kg
6.6E-06
(mg/kg/day)
NA
(mg/kg/day)"
2.3E-05
(mg/kg/day)
9.6E-04
(mg/kg/day)
0.024
Vanadium
27
mg/kg
3.9E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.4E-06
(mg/kg/day)
1.3E-04
(mg/kg/day)
0.011
Zinc
705
mg/kg
1.0E-05
(mg/kg/day)
NA
(mg/kg/day)"
3.6E-05
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.00012
Exp. Route Total
7.1E-07
0.054
Exposure Point Total
3.1E-06
0.25
Exposure Medium Total
3.1E-06
0.25
Air
OWR
Inhalation
Benzo(a)pyrene
8.8E-11
mg/m3
4.8E-11
(mg/m3)
6.0E-04
(ug/m3)"1
2.9E-11
8.5E-11
(mg/m3)
2.0E-06
(mg/m3)
0.000042
Naphthalene
1.7E-04
mg/m3
4.5E-05
(mg/m3)
3.4E-05
(ug/m3)"1
1.5E-06
1.6E-04
(mg/m3)
3.0E-03
(mg/m3)
0.053
Dieldrin
3.4E-11
mg/m3
9.3E-12
(mg/m3)
4.6E-03
(ug/m3)"1
4.3E-11
3.3E-11
(mg/m3)
NA
(mg/m3)
Aluminum
3.7E-06
mg/m
1.0E-06
(mg/m3)
NA
(ug/m3)"1
3.6E-06
(mg/m3)
5.0E-03
(mg/m3)
0.00071
Antimony
3.5E-09
mg/m3
9.6E-10
(mg/m3)
NA
(ug/m3)"1
3.3E-09
(mg/m3)
NA
(mg/m3)
Arsenic
1.6E-09
mg/m3
4.5E-10
(mg/m3)
4.3E-03
(ug/m3)"1
1.9E-09
1.6E-09
(mg/m3)
1.5E-05
(mg/m3)
0.00010
Cobalt
2.3E-09
mg/m3
6.4E-10
(mg/m3)
9.0E-03
(ug/m3)"1
5.8E-09
2.2E-09
(mg/m3)
6.0E-06
(mg/m3)
0.00037
Copper
3.8E-07
mg/m3
1.0E-07
(mg/m3)
NA
(ug/m3)"1
3.7E-07
(mg/m3)
NA
(mg/m3)
Iron
6.2E-06
mg/m3
1.7E-06
(mg/m3)
NA
(ug/m3)"1
6.0E-06
(mg/m3)
NA
(mg/m3)
Lead
4.0E-08
mg/m3
1.1E-08
(mg/m3)
NA
(ug/m3)"1
3.9E-08
(mg/m3)
NA
(mg/m3)
Manganese
1.4E-07
mg/m3
3.9E-08
(mg/m3)
NA
(ug/m3)"1
1.3E-07
(mg/m3)
5.0E-05
(mg/m3)
0.0027
Vanadium
8.3E-09
mg/m3
2.3E-09
(mg/m3)
NA
(ug/m3)"1
8.0E-09
(mg/m3)
1.0E-04
(mg/m3)
0.000080
Zinc
2.2E-07
mg/m3
6.0E-08
(mg/m3)
NA
(ug/m3)"1
2.1E-07
(mg/m3)
NA
(mg/m3)
Exp. Route Total
1.5E-06
0.057
Exposure Point Total
1.5E-06
0.057
Exposure Medium Total
1.5E-06
0.057
Medium Total
4.7E-06
0.31
-------
TABLE 7.3.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 2
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Adult
Medium
Exposure Medium
Exposure Point
Exposure Route Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
|
Value
Units
Value
Units
Value
Units
Value
Units
Sediment
Sediment
OWR
Ingestion Cobalt
14
mg/kg
7.1E-07
(mg/kg/day)
NA
(mg/kg/day)"1
2.5E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.008
[Nickel
1500
mg/kg
7.6E-05
(mg/kg/day)
NA
(mg/kg/day)"1
2.7E-04
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.013
I Exp. Route Total |
0.022
Dermal jCobalt
14
mg/kg
3.0E-08
(mg/kg/day)
NA
(mg/kg/day)"1
1.1E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.000
| Nickel
1500
mg/kg
3.2E-06
(mg/kg/day)
NA
(mg/kg/day)"1
1.1E-05
(mg/kg/day)
8.0E-04
(mg/kg/day)
0.014
Exp. Route Total jj
0.014
Exposure Point Total
0.036
Exposure Medium Total
0.036
Medium Total
0.036
Total of Receptor Risks Across All Media
4.7E-06
Total of Receptor Hazards Across All Media
0.35
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 7.4.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 2
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Surface Soil
Surface Soil
OWR
Ingestion
Benzo(a)pyrene
0.286
mg/kg
1.9E-06
(mg/kg/day)
1.0E+00
(mg/kg/day)"
1.9E-06
See Tables 7.2.RME and 7.3.RME for Hazard Indices
Naphthalene
9.8
mg/kg
1.4E-05
(mg/kg/day)
NA
(mg/kg/day)"
Dieldrin
0.11
mg/kg
1.6E-07
(mg/kg/day)
1.6E+01
(mg/kg/day)"
2.5E-06
Aluminum
12000
mg/kg
1.7E-02
(mg/kg/day)
NA
(mg/kg/day)"
Antimony
11.3
mg/kg
1.6E-05
(mg/kg/day)
NA
(mg/kg/day)"
Arsenic
5.28
mg/kg
4.6E-06
(mg/kg/day)
1.5E+00
(mg/kg/day)"
6.8E-06
Cobalt
7.59
mg/kg
1.1E-05
(mg/kg/day)
NA
(mg/kg/day)"
Copper
1240
mg/kg
1.8E-03
(mg/kg/day)
NA
(mg/kg/day)"
Iron
20200
mg/kg
2.9E-02
(mg/kg/day)
NA
(mg/kg/day)"
Lead
131
mg/kg
1.9E-04
(mg/kg/day)
NA
(mg/kg/day)"
Manganese
456
mg/kg
6.6E-04
(mg/kg/day)
NA
(mg/kg/day)"
Vanadium
27
mg/kg
3.9E-05
(mg/kg/day)
NA
(mg/kg/day)"
Zinc
705
mg/kg
1.0E-03
(mg/kg/day)
NA
(mg/kg/day)"
Exp. Route Total
1.1E-05
Dermal
Benzo(a)pyrene
0.286
mg/kg
6.2E-07
(mg/kg/day)
1.0E+00
(mg/kg/day)"
6.2E-07
Naphthalene
9.8
mg/kg
5.2E-06
(mg/kg/day)
NA
(mg/kg/day)"
Dieldrin
0.11
mg/kg
4.5E-08
(mg/kg/day)
1.6E+01
(mg/kg/day)"
7.1E-07
Aluminum
12000
mg/kg
4.9E-04
(mg/kg/day)
NA
(mg/kg/day)"
Antimony
11.3
mg/kg
4.6E-07
(mg/kg/day)
NA
(mg/kg/day)"
Arsenic
5.28
mg/kg
6.4E-07
(mg/kg/day)
1.5E+00
(mg/kg/day)"
9.6E-07
Cobalt
7.59
mg/kg
3.1E-07
(mg/kg/day)
NA
(mg/kg/day)"
Copper
1240
mg/kg
5.0E-05
(mg/kg/day)
NA
(mg/kg/day)"
Iron
20200
mg/kg
8.2E-04
(mg/kg/day)
NA
(mg/kg/day)"
Lead
131
mg/kg
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)"
Manganese
456
mg/kg
1.8E-05
(mg/kg/day)
NA
(mg/kg/day)"
Vanadium
27
mg/kg
1.1E-06
(mg/kg/day)
NA
(mg/kg/day)"
Zinc
705
mg/kg
2.9E-05
(mg/kg/day)
NA
(mg/kg/day)"
Exp. Route Total
2.3E-06
Exposure Point Total
1.4E-05
Exposure Medium Total
1.4E-05
Air
OWR
Inhalation
Benzo(a)pyrene
8.8E-11
mg/m3
8.7E-11
(mg/m3)
6.0E-04
(ug/m3)"1
5.2E-11
Naphthalene
1.7E-04
mg/m3
5.9E-05
(mg/m3)
3.4E-05
(ug/m3)"1
2.0E-06
Dieldrin
3.4E-11
mg/m3
1.2E-11
(mg/m3)
4.6E-03
(ug/m3)"1
5.6E-11
Aluminum
3.7E-06
mg/m3
1.3E-06
(mg/m3)
NA
(ug/m3)"1
Antimony
3.5E-09
mg/m3
1.2E-09
(mg/m3)
NA
(ug/m3)"1
Arsenic
1.6E-09
mg/m3
5.8E-10
(mg/m3)
4.3E-03
(ug/m3)"1
2.5E-09
Cobalt
2.3E-09
mg/m3
8.3E-10
(mg/m3)
9.0E-03
(ug/m3)"1
7.5E-09
Copper
3.8E-07
mg/m3
1.4E-07
(mg/m3)
NA
(ug/m3)"1
Iron
6.2E-06
mg/m3
2.2E-06
(mg/m3)
NA
(ug/m3)"1
Lead
4.0E-08
mg/m3
1.4E-08
(mg/m3)
NA
(ug/m3)"1
Manganese
1.4E-07
mg/m3
5.0E-08
(mg/m3)
NA
(ug/m3)"1
Vanadium
8.3E-09
mg/m3
3.0E-09
(mg/m3)
NA
(ug/m3)"1
Zinc
2.2E-07
mg/m3
7.7E-08
(mg/m3)
NA
(ug/m3)"1
Exp. Route Total
2.0E-06
Exposure Point Total
2.0E-06
Exposure Medium Total
2.0E-06
Medium Total
1.6E-05
-------
TABLE 7.4.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 2
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Medium
Exposure Medium
Exposure Point
Exposure Route Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
|
Value
Units
Value
Units
Value
Units
Value
Units
Sediment
Sediment
OWR
Ingestion Cobalt
14
mg/kg
3.0E-06
(mg/kg/day)
NA
(mg/kg/day)"1
[Nickel
1500
mg/kg
3.2E-04
(mg/kg/day)
NA
(mg/kg/day)"1
I Exp. Route Total |
Dermal jCobalt
14
mg/kg
8.4E-08
(mg/kg/day)
NA
(mg/kg/day)"1
| Nickel
1500
mg/kg
9.0E-06
(mg/kg/day)
NA
(mg/kg/day)"1
Exp. Route Total jj
Exposure Point Total
Exposure Medium Total
Medium Total
Total of Receptor Risks Across All Media
1.6E-05
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 7.5.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 3
Scenario Timeframe: Future
Receptor Population: Construction Workers
Receptor Age: Adult
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Ingestion
Benzo(a)pyrene
0.252
mg/kg
1.0E-08
(mg/kg/day)
1.0E+00
(mg/kg/day)"
1.0E-08
7.1E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0024
Naphthalene
9.8
mg/kg
4.0E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.8E-05
(mg/kg/day)
6.0E-01
(mg/kg/day)
0.000046
Dieldrin
0.11
mg/kg
4.4E-09
(mg/kg/day)
1.6E+01
(mg/kg/day)"
7.1E-08
3.1E-07
(mg/kg/day)
1.0E-04
(mg/kg/day)
0.0031
Aluminum
9940
mg/kg
4.0E-04
(mg/kg/day)
NA
(mg/kg/day)"
2.8E-02
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.028
Antimony
6.48
mg/kg
2.6E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.8E-05
(mg/kg/day)
4.0E-04
(mg/kg/day)
0.046
Arsenic
3.95
mg/kg
9.6E-08
(mg/kg/day)
1.5E+00
(mg/kg/day)"
1.4E-07
6.7E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.022
Cobalt
6.32
mg/kg
2.6E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.8E-05
(mg/kg/day)
3.0E-03
(mg/kg/day)
0.0060
Copper
660
mg/kg
2.7E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.9E-03
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.047
Iron
19200
mg/kg
7.7E-04
(mg/kg/day)
NA
(mg/kg/day)"
5.4E-02
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.077
Lead
71.4
mg/kg
2.9E-06
(mg/kg/day)
NA
(mg/kg/day)"
2.0E-04
(mg/kg/day)
NA
(mg/kg/day)
Manganese
388
mg/kg
1.6E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.1E-03
(mg/kg/day)
2.4E-02
(mg/kg/day)
0.046
Thallium
2.13
mg/kg
8.6E-08
(mg/kg/day)
NA
(mg/kg/day)"
6.0E-06
(mg/kg/day)
4.0E-05
(mg/kg/day)
0.15
Vanadium
23.6
mg/kg
9.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
6.7E-05
(mg/kg/day)
1.0E-02
(mg/kg/day)
0.0067
Zinc
380
mg/kg
1.5E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.1E-03
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.0036
Exp. Route Total
2.2E-07
0.44
Dermal
Benzo(a)pyrene
0.252
mg/kg
4.2E-09
(mg/kg/day)
1.0E+00
(mg/kg/day)"
4.2E-09
3.0E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00099
Naphthalene
9.8
mg/kg
1.6E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.2E-05
(mg/kg/day)
6.0E-01
(mg/kg/day)
0.000019
Dieldrin
0.11
mg/kg
1.4E-09
(mg/kg/day)
1.6E+01
(mg/kg/day)"
2.3E-08
1.0E-07
(mg/kg/day)
1.0E-04
(mg/kg/day)
0.00100
Aluminum
9940
mg/kg
1.3E-05
(mg/kg/day)
NA
(mg/kg/day)"
9.0E-04
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.00090
Antimony
6.48
mg/kg
8.4E-09
(mg/kg/day)
NA
(mg/kg/day)"
5.9E-07
(mg/kg/day)
6.0E-05
(mg/kg/day)
0.0098
Arsenic
3.95
mg/kg
1.5E-08
(mg/kg/day)
1.5E+00
(mg/kg/day)"
2.3E-08
1.1E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0036
Cobalt
6.32
mg/kg
8.2E-09
(mg/kg/day)
NA
(mg/kg/day)"
5.7E-07
(mg/kg/day)
3.0E-03
(mg/kg/day)
0.00019
Copper
660
mg/kg
8.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
6.0E-05
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.0015
Iron
19200
mg/kg
2.5E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.7E-03
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.0025
Lead
71.4
mg/kg
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)"
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)
Manganese
388
mg/kg
5.0E-07
(mg/kg/day)
NA
(mg/kg/day)"
3.5E-05
(mg/kg/day)
9.6E-04
(mg/kg/day)
0.037
Thallium
2.13
mg/kg
2.8E-09
(mg/kg/day)
NA
(mg/kg/day)"
1.9E-07
(mg/kg/day)
4.0E-05
(mg/kg/day)
0.0048
Vanadium
23.6
mg/kg
3.1E-08
(mg/kg/day)
NA
(mg/kg/day)"
2.1E-06
(mg/kg/day)
2.6E-04
(mg/kg/day)
0.0082
Zinc
380
mg/kg
4.9E-07
(mg/kg/day)
NA
(mg/kg/day)"
3.4E-05
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.00011
Exp. Route Total
5.0E-08
0.070
Exposure Point Total
2.7E-07
0.51
Exposure Medium Total
2.7E-07
0.51
Air
OWR
Inhalation
Benzo(a)pyrene
1.8E-07
mg/m3
5.9E-10
(mg/m3)
6.0E-04
(ug/m3)"1
3.5E-10
4.1E-08
(mg/m3)
2.0E-06
(mg/m3)
0.021
Naphthalene
9.6E-04
mg/m3
3.1E-06
(mg/m3)
3.4E-05
(ug/m3)"1
1.1E-07
2.2E-04
(mg/m3)
3.0E-03
(mg/m3)
0.073
Dieldrin
7.9E-08
mg/m3
2.6E-10
(mg/m3)
4.6E-03
(ug/m3)"1
1.2E-09
1.8E-08
(mg/m3)
NA
(mg/m3)
Aluminum
7.1E-03
mg/m3
2.3E-05
(mg/m3)
NA
(ug/m3)"1
1.6E-03
(mg/m3)
5.0E-03
(mg/m3)
0.32
Antimony
4.6E-06
mg/m3
1.5E-08
(mg/m3)
NA
(ug/m3)"1
1.1E-06
(mg/m3)
NA
(mg/m3)
Arsenic
2.8E-06
mg/m3
9.2E-09
(mg/m3)
4.3E-03
(ug/m3)"1
4.0E-08
6.4E-07
(mg/m3)
1.5E-05
(mg/m3)
0.043
Cobalt
4.5E-06
mg/m3
1.5E-08
(mg/m3)
9.0E-03
(ug/m3)"1
1.3E-07
1.0E-06
(mg/m3)
2.0E-05
(mg/m3)
0.052
Copper
4.7E-04
mg/m3
1.5E-06
(mg/m3)
NA
(ug/m3)"1
1.1E-04
(mg/m3)
NA
(mg/m3)
Iron
1.4E-02
mg/m3
4.5E-05
(mg/m3)
NA
(ug/m3)"1
3.1E-03
(mg/m3)
NA
(mg/m3)
Lead
5.1E-05
mg/m3
1.7E-07
(mg/m3)
NA
(ug/m3)"1
1.2E-05
(mg/m3)
NA
(mg/m3)
Manganese
2.8E-04
mg/m3
9.0E-07
(mg/m3)
NA
(ug/m3)"1
6.3E-05
(mg/m3)
5.0E-05
(mg/m3)
1.27
Thallium
1.5E-06
mg/m3
5.0E-09
(mg/m3)
NA
(ug/m3)"1
3.5E-07
(mg/m3)
NA
(mg/m3)
Vanadium
1.7E-05
mg/m
5.5E-08
(mg/m3)
NA
(ug/m3)"1
3.8E-06
(mg/m3)
1.0E-04
(mg/m3)
0.038
Zinc
2.7E-04
mg/m3
8.9E-07
(mg/m3)
NA
(ug/m3)"1
6.2E-05
(mg/m3)
NA
(mg/m3)
Exp. Route Total
2.8E-07
1.8
Exposure Point Total
2.8E-07
1.8
Exposure Medium Total
2.8E-07
1.8
Medium Total
5.5E-07
2.3
-------
TABLE 7.5.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 3
Scenario Timeframe: Future
Receptor Population: Construction Workers
Receptor Age: Adult
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Groundwater
Groundwater
OWR
Ingestion
2-Butanone
2
ug/L
1.5E-09
(mg/kg/day)
NA
(mg/kg/day)"
1.0E-07
(mg/kg/day)
2.0E+00
(mg/kg/day)
5.1 E-8
cis-1,2-Dichloroethene
3.1
ug/L
2.3E-09
(mg/kg/day)
NA
(mg/kg/day)"
1.6E-07
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.0000080
Methyl tert-butyl ether
0.95
ug/L
7.0E-10
(mg/kg/day)
1.8E-03
(mg/kg/day)"
1.3E-12
4.9E-08
(mg/kg/day)
NA
(mg/kg/day)
Trichloroethene
27
ug/L
2.0E-08
(mg/kg/day)
4.6E-02
(mg/kg/day)"
9.1E-10
1.4E-06
(mg/kg/day)
5.0E-04
(mg/kg/day)
0.0028
1,4-Dioxane
3.8
ug/L
2.8E-09
(mg/kg/day)
1.0E-01
(mg/kg/day)"
2.8E-10
2.0E-07
(mg/kg/day)
5.0E-01
(mg/kg/day)
0.00000039
Caprolactam
3.7
ug/L
2.7E-09
(mg/kg/day)
NA
(mg/kg/day)"
1.9E-07
(mg/kg/day)
5.0E-01
(mg/kg/day)
0.00000038
Aluminum
114000
ug/L
8.4E-05
(mg/kg/day)
NA
(mg/kg/day)"
5.9E-03
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.0059
Antimony
0.46
ug/L
3.4E-10
(mg/kg/day)
NA
(mg/kg/day)"
2.4E-08
(mg/kg/day)
4.0E-04
(mg/kg/day)
0.000059
Arsenic
60.1
ug/L
4.4E-08
(mg/kg/day)
1.5E+00
(mg/kg/day)"
6.6E-08
3.1E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.010
Barium
3310
ug/L
2.4E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.7E-04
(mg/kg/day)
2.0E-01
(mg/kg/day)
0.00085
Beryllium
17.8
ug/L
1.3E-08
(mg/kg/day)
NA
(mg/kg/day)"
9.1E-07
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.00018
Cadmium
0.45
ug/L
3.3E-10
(mg/kg/day)
NA
(mg/kg/day)"
2.3E-08
(mg/kg/day)
5.0E-04
(mg/kg/day)
0.000046
Cobalt
12.2
ug/L
9.0E-09
(mg/kg/day)
NA
(mg/kg/day)"
6.3E-07
(mg/kg/day)
3.0E-03
(mg/kg/day)
0.00021
Copper
39.9
ug/L
2.9E-08
(mg/kg/day)
NA
(mg/kg/day)"
2.0E-06
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.000051
Iron
74900
ug/L
5.5E-05
(mg/kg/day)
NA
(mg/kg/day)"
3.8E-03
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.0055
Lead
206
ug/L
1.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.1E-05
(mg/kg/day)
NA
(mg/kg/day)
Manganese
1020
ug/L
7.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
5.2E-05
(mg/kg/day)
2.4E-02
(mg/kg/day)
0.0022
Mercury
0.091
ug/L
6.7E-11
(mg/kg/day)
NA
(mg/kg/day)"
4.7E-09
(mg/kg/day)
2.0E-03
(mg/kg/day)
0.0000023
Nickel
15.8
ug/L
1.2E-08
(mg/kg/day)
NA
(mg/kg/day)"
8.1E-07
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.000041
Selenium
1.6
ug/L
1.2E-09
(mg/kg/day)
NA
(mg/kg/day)"
8.2E-08
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.000016
Thallium
2.3
ug/L
1.7E-09
(mg/kg/day)
NA
(mg/kg/day)"
1.2E-07
(mg/kg/day)
4.0E-05
(mg/kg/day)
0.0030
Vanadium
30.5
ug/L
2.2E-08
(mg/kg/day)
NA
(mg/kg/day)"
1.6E-06
(mg/kg/day)
1.0E-02
(mg/kg/day)
0.00016
Zinc
343
ug/L
2.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.8E-05
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.000059
Exp. Route Total
6.7E-08
0.031
Dermal
2-Butanone
2
ug/L
8.5E-10
(mg/kg/day)
NA
(mg/kg/day)"
5.9E-08
(mg/kg/day)
2.0E+00
(mg/kg/day)
3.0E-8
cis-1,2-Dichloroethene
3.1
ug/L
1.5E-08
(mg/kg/day)
NA
(mg/kg/day)"
1.0E-06
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.000052
Methyl tert-butyl ether
0.95
ug/L
8.9E-10
(mg/kg/day)
1.8E-03
(mg/kg/day)"
1.6E-12
6.2E-08
(mg/kg/day)
NA
(mg/kg/day)
Trichloroethene
27
ug/L
1.4E-07
(mg/kg/day)
4.6E-02
(mg/kg/day)"
6.6E-09
1.0E-05
(mg/kg/day)
5.0E-04
(mg/kg/day)
0.020
1,4-Dioxane
3.8
ug/L
5.6E-10
(mg/kg/day)
1.0E-01
(mg/kg/day)"
5.6E-11
4.0E-08
(mg/kg/day)
5.0E-01
(mg/kg/day)
7.9E-8
Caprolactam
3.7
ug/L
1.7E-09
(mg/kg/day)
NA
(mg/kg/day)"
1.2E-07
(mg/kg/day)
5.0E-01
(mg/kg/day)
0.00000024
Aluminum
114000
ug/L
4.7E-05
(mg/kg/day)
NA
(mg/kg/day)"
3.3E-03
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.0033
Antimony
0.46
ug/L
1.9E-10
(mg/kg/day)
NA
(mg/kg/day)"
1.3E-08
(mg/kg/day)
6.0E-05
(mg/kg/day)
0.00022
Arsenic
60.1
ug/L
2.5E-08
(mg/kg/day)
1.5E+00
(mg/kg/day)"
3.7E-08
1.7E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0058
Barium
3310
ug/L
1.4E-06
(mg/kg/day)
NA
(mg/kg/day)"
9.6E-05
(mg/kg/day)
1.4E-02
(mg/kg/day)
0.0069
Beryllium
17.8
ug/L
7.4E-09
(mg/kg/day)
NA
(mg/kg/day)"
5.2E-07
(mg/kg/day)
3.5E-05
(mg/kg/day)
0.015
Cadmium
0.45
ug/L
1.9E-10
(mg/kg/day)
NA
(mg/kg/day)"
1.3E-08
(mg/kg/day)
2.5E-05
(mg/kg/day)
0.00052
Cobalt
12.2
ug/L
2.0E-09
(mg/kg/day)
NA
(mg/kg/day)"
1.4E-07
(mg/kg/day)
3.0E-03
(mg/kg/day)
0.000047
Copper
39.9
ug/L
1.7E-08
(mg/kg/day)
NA
(mg/kg/day)"
1.2E-06
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.000029
Iron
74900
ug/L
3.1E-05
(mg/kg/day)
NA
(mg/kg/day)"
2.2E-03
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.0031
Lead
206
ug/L
8.5E-09
(mg/kg/day)
NA
(mg/kg/day)"
6.0E-07
(mg/kg/day)
NA
(mg/kg/day)
Manganese
1020
ug/L
4.2E-07
(mg/kg/day)
NA
(mg/kg/day)"
3.0E-05
(mg/kg/day)
9.6E-04
(mg/kg/day)
0.031
Mercury
0.091
ug/L
3.8E-11
(mg/kg/day)
NA
(mg/kg/day)"
2.6E-09
(mg/kg/day)
1.4E-04
(mg/kg/day)
0.000019
Nickel
15.8
ug/L
1.3E-09
(mg/kg/day)
NA
(mg/kg/day)"
9.2E-08
(mg/kg/day)
8.0E-04
(mg/kg/day)
0.00011
Selenium
1.6
ug/L
6.6E-10
(mg/kg/day)
NA
(mg/kg/day)"
4.6E-08
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.0000093
Thallium
2.3
ug/L
9.5E-10
(mg/kg/day)
NA
(mg/kg/day)"
6.7E-08
(mg/kg/day)
4.0E-05
(mg/kg/day)
0.0017
Vanadium
30.5
ug/L
1.3E-08
(mg/kg/day)
NA
(mg/kg/day)"
8.8E-07
(mg/kg/day)
2.6E-04
(mg/kg/day)
0.0034
Zinc
343
ug/L
8.5E-08
(mg/kg/day)
NA
(mg/kg/day)"
6.0E-06
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.000020
Exp. Route Total
4.4E-08
0.09
Exposure Point Total
1.1E-07
0.12
Exposure Medium Total
1.1E-07
0.12
-------
TABLE 7.5.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 3 OF 3
Scenario Timeframe: Future
Receptor Population: Construction Workers
Receptor Age: Adult
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
Potential Concern
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Groundwater
Air
OWR
Inhalation
2-Butanone
9.4E-03
mg/m3
3.7E-06
(mg/m3)
NA
(ug/m3)"1
2.6E-04
(mg/m3)
1.0E+00
(mg/m3)
0.00026
cis-1,2-Dichloroethene
2.6E-02
mg/m3
1.0E-05
(mg/m3)
NA
(ug/m3)"1
7.1E-04
(mg/m3)
NA
(mg/m3)
Methyl tert-butyl ether
7.7E-03
mg/m3
3.0E-06
(mg/m3)
2.6E-07
(ug/m3)"1
7.8E-10
2.1E-04
(mg/m3)
3.0E+00
(mg/m3)
0.000070
Trichloroethene
2.0E-01
mg/m3
7.7E-05
(mg/m3)
4.1E-06
(ug/m3)"1
3.1E-07
5.4E-03
(mg/m3)
2.0E-03
(mg/m3)
2.7
1,4-Dioxane
2.5E-03
mg/m3
9.8E-07
(mg/m3)
5.0E-06
(ug/m3)"1
4.9E-09
6.8E-05
(mg/m3)
7.2E-01
(mg/m3)
0.000095
Caprolactam
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
2.2E-03
(mg/m3)
Aluminum
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
5.0E-03
(mg/m3)
Antimony
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Arsenic
0.0E+00
mg/m3
0.0E+00
(mg/m3)
4.3E-03
(ug/m3)"1
0.0E+00
(mg/m3)
1.5E-05
(mg/m3)
Barium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
5.0E-03
(mg/m3)
Beryllium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
2.4E-03
(ug/m3)"1
0.0E+00
(mg/m3)
2.0E-05
(mg/m3)
Cadmium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
1.8E-03
(ug/m3)"1
0.0E+00
(mg/m3)
1.0E-05
(mg/m3)
Cobalt
0.0E+00
mg/m3
0.0E+00
(mg/m3)
9.0E-03
(ug/m3)"1
0.0E+00
(mg/m3)
2.0E-05
(mg/m3)
Copper
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Iron
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Lead
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Manganese
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
5.0E-05
(mg/m3)
Mercury
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
3.0E-04
(mg/m3)
Nickel
0.0E+00
mg/m3
0.0E+00
(mg/m3)
2.6E-04
(ug/m3)"1
0.0E+00
(mg/m3)
2.0E-04
(mg/m3)
Selenium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
2.0E-02
(mg/m3)
Thallium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Vanadium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
1.0E-04
(mg/m3)
Zinc
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Exp. Route Total
3.2E-07
2.7
Exposure Point Total
3.2E-07
2.7
Exposure Medium Total
3.2E-07
2.7
Medium Total
4.3E-07
2.8
Total of Receptor Risks Across All Media
9.9E-07
Total of Receptor Hazards Across All Media
5.1
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 7.6.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 3
Scenario Timeframe: Future
Receptor Population: Industrial Worker
Receptor Age: Adult
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Ingestion
Benzo(a)pyrene
0.252
mg/kg
7.7E-08
(mg/kg/day)
1.0E+00
(mg/kg/day)"
7.7E-08
2.2E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00072
Naphthalene
9.8
mg/kg
3.0E-06
(mg/kg/day)
NA
(mg/kg/day)"
8.4E-06
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.00042
Dieldrin
0.11
mg/kg
3.4E-08
(mg/kg/day)
1.6E+01
(mg/kg/day)"
5.4E-07
9.4E-08
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.0019
Aluminum
9940
mg/kg
3.0E-03
(mg/kg/day)
NA
(mg/kg/day)"
8.5E-03
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.009
Antimony
6.48
mg/kg
2.0E-06
(mg/kg/day)
NA
(mg/kg/day)"
5.5E-06
(mg/kg/day)
4.0E-04
(mg/kg/day)
0.014
Arsenic
3.95
mg/kg
7.2E-07
(mg/kg/day)
1.5E+00
(mg/kg/day)"
1.1E-06
2.0E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0068
Cobalt
6.32
mg/kg
1.9E-06
(mg/kg/day)
NA
(mg/kg/day)"
5.4E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.018
Copper
660
mg/kg
2.0E-04
(mg/kg/day)
NA
(mg/kg/day)"
5.7E-04
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.014
Iron
19200
mg/kg
5.9E-03
(mg/kg/day)
NA
(mg/kg/day)"
1.6E-02
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.023
Lead
71.4
mg/kg
2.2E-05
(mg/kg/day)
NA
(mg/kg/day)"
6.1E-05
(mg/kg/day)
NA
(mg/kg/day)
Manganese
388
mg/kg
1.2E-04
(mg/kg/day)
NA
(mg/kg/day)"
3.3E-04
(mg/kg/day)
2.4E-02
(mg/kg/day)
0.014
Thallium
2.13
mg/kg
6.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.8E-06
(mg/kg/day)
1.0E-05
(mg/kg/day)
0.18
Vanadium
23.6
mg/kg
7.2E-06
(mg/kg/day)
NA
(mg/kg/day)"
2.0E-05
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.0040
Zinc
380
mg/kg
1.2E-04
(mg/kg/day)
NA
(mg/kg/day)"
3.3E-04
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.0011
Exp. Route Total
1.7E-06
0.29
Dermal
Benzo(a)pyrene
0.252
mg/kg
4.2E-08
(mg/kg/day)
1.0E+00
(mg/kg/day)"
4.2E-08
1.2E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00040
Naphthalene
9.8
mg/kg
1.6E-06
(mg/kg/day)
NA
(mg/kg/day)"
4.6E-06
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.00023
Dieldrin
0.11
mg/kg
1.4E-08
(mg/kg/day)
1.6E+01
(mg/kg/day)"
2.3E-07
4.0E-08
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.00080
Aluminum
9940
mg/kg
1.3E-04
(mg/kg/day)
NA
(mg/kg/day)"
3.6E-04
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.00036
Antimony
6.48
mg/kg
8.4E-08
(mg/kg/day)
NA
(mg/kg/day)"
2.3E-07
(mg/kg/day)
6.0E-05
(mg/kg/day)
0.0039
Arsenic
3.95
mg/kg
1.5E-07
(mg/kg/day)
1.5E+00
(mg/kg/day)"
2.3E-07
4.3E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0014
Cobalt
6.32
mg/kg
8.2E-08
(mg/kg/day)
NA
(mg/kg/day)"
2.3E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00076
Copper
660
mg/kg
8.5E-06
(mg/kg/day)
NA
(mg/kg/day)"
2.4E-05
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.0006
Iron
19200
mg/kg
2.5E-04
(mg/kg/day)
NA
(mg/kg/day)"
7.0E-04
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.0010
Lead
71.4
mg/kg
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)"
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)
Manganese
388
mg/kg
5.0E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.4E-05
(mg/kg/day)
9.6E-04
(mg/kg/day)
0.015
Thallium
2.13
mg/kg
2.8E-08
(mg/kg/day)
NA
(mg/kg/day)"
7.7E-08
(mg/kg/day)
1.0E-05
(mg/kg/day)
0.0077
Vanadium
23.6
mg/kg
3.1E-07
(mg/kg/day)
NA
(mg/kg/day)"
8.6E-07
(mg/kg/day)
1.3E-04
(mg/kg/day)
0.0066
Zinc
380
mg/kg
4.9E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.4E-05
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.000046
Exp. Route Total
5.0E-07
0.038
Exposure Point Total
2.2E-06
0.33
Exposure Medium Total
2.2E-06
0.33
Air
OWR
Inhalation
Benzo(a)pyrene
7.8E-11
mg/m3
6.3E-12
(mg/m3)
6.0E-04
(ug/m3)"1
3.8E-12
1.8E-11
(mg/m3)
2.0E-06
(mg/m3)
0.000009
Naphthalene
1.7E-04
mg/m3
1.3E-05
(mg/m3)
3.4E-05
(ug/m3)"1
4.6E-07
3.8E-05
(mg/m3)
3.0E-03
(mg/m3)
0.013
Dieldrin
3.4E-11
mg/m3
2.8E-12
(mg/m3)
4.6E-03
(ug/m3)"1
1.3E-11
7.8E-12
(mg/m3)
NA
(mg/m3)
Aluminum
3.1E-06
mg/m3
2.5E-07
(mg/m3)
NA
(ug/m3)"1
7.0E-07
(mg/m3)
5.0E-03
(mg/m3)
0.00014
Antimony
2.0E-09
mg/m3
1.6E-10
(mg/m3)
NA
(ug/m3)"1
4.6E-10
(mg/m3)
NA
(mg/m3)
Arsenic
1.2E-09
mg/m3
9.9E-11
(mg/m3)
4.3E-03
(ug/m3)"1
4.3E-10
2.8E-10
(mg/m3)
1.5E-05
(mg/m3)
0.000019
Cobalt
2.0E-09
mg/m3
1.6E-10
(mg/m3)
9.0E-03
(ug/m3)"1
1.4E-09
4.5E-10
(mg/m3)
6.0E-06
(mg/m3)
0.000074
Copper
2.0E-07
mg/m3
1.7E-08
(mg/m3)
NA
(ug/m3)"1
4.7E-08
(mg/m3)
NA
(mg/m3)
Iron
5.9E-06
mg/m3
4.8E-07
(mg/m3)
NA
(ug/m3)"1
1.4E-06
(mg/m3)
NA
(mg/m3)
Lead
2.2E-08
mg/m3
1.8E-09
(mg/m3)
NA
(ug/m3)"1
5.0E-09
(mg/m3)
NA
(mg/m3)
Manganese
1.2E-07
mg/m3
9.8E-09
(mg/m3)
NA
(ug/m3)"1
2.7E-08
(mg/m3)
5.0E-05
(mg/m3)
0.00055
Thallium
6.6E-10
mg/m3
5.4E-11
(mg/m3)
NA
(ug/m3)"1
1.5E-10
(mg/m3)
NA
(mg/m3)
Vanadium
7.3E-09
mg/m
5.9E-10
(mg/m3)
NA
(ug/m3)"1
1.7E-09
(mg/m3)
1.0E-04
(mg/m3)
0.000017
Zinc
1.2E-07
mg/m3
9.6E-09
(mg/m3)
NA
(ug/m3)"1
2.7E-08
(mg/m3)
NA
(mg/m3)
Exp. Route Total
4.6E-07
0.013
Exposure Point Total
4.6E-07
0.013
Exposure Medium Total
4.6E-07
0.013
Medium Total
2.7E-06
0.34
-------
TABLE 7.6.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 3
Scenario Timeframe: Future
Receptor Population: Industrial Worker
Receptor Age: Adult
Exposure Medium
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Ingestion
2-Butanone
1300
ug/L
5.0E-03
(mg/kg/day)
NA
(mg/kg/day)"
1.4E-02
(mg/kg/day)
6.0E-01
(mg/kg/day)
0.023
2-Hexanone
41
ug/L
1.6E-04
(mg/kg/day)
NA
(mg/kg/day)"
4.4E-04
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.088
Chloroform
9.4
ug/L
3.6E-05
(mg/kg/day)
3.1E-02
(mg/kg/day)"
1.1E-06
1.0E-04
(mg/kg/day)
1.0E-02
(mg/kg/day)
0.010
cis-1,2-Dichloroethene
1.88
ug/L
7.2E-06
(mg/kg/day)
NA
(mg/kg/day)"
2.0E-05
(mg/kg/day)
2.0E-03
(mg/kg/day)
0.010
Methyl Tert-Butyl Ether
15
ug/L
5.7E-05
(mg/kg/day)
1.8E-03
(mg/kg/day)"
1.0E-07
1.6E-04
(mg/kg/day)
NA
(mg/kg/day)
Tetrachloroethene
65.7
ug/L
2.5E-04
(mg/kg/day)
2.1E-03
(mg/kg/day)"
5.3E-07
7.0E-04
(mg/kg/day)
6.0E-03
(mg/kg/day)
0.12
Trichloroethene
10.6
ug/L
4.1E-05
(mg/kg/day)
4.6E-02
(mg/kg/day)"
1.9E-06
1.1E-04
(mg/kg/day)
5.0E-04
(mg/kg/day)
0.23
Vinyl Chloride
0.57
ug/L
2.2E-06
(mg/kg/day)
7.2E-01
(mg/kg/day)"
1.6E-06
6.1E-06
(mg/kg/day)
3.0E-03
(mg/kg/day)
0.0020
1,4-Dioxane
3.84
ug/L
1.5E-05
(mg/kg/day)
1.0E-01
(mg/kg/day)"
1.5E-06
4.1E-05
(mg/kg/day)
3.0E-02
(mg/kg/day)
0.0014
Bis(2-ethylhexyl)phthalate
11
ug/L
4.2E-05
(mg/kg/day)
1.4E-02
(mg/kg/day)"
5.9E-07
1.2E-04
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.0059
Caprolactam
2800
ug/L
1.1E-02
(mg/kg/day)
NA
(mg/kg/day)"
3.0E-02
(mg/kg/day)
5.0E-01
(mg/kg/day)
0.060
Aluminum
57655
ug/L
2.2E-01
(mg/kg/day)
NA
(mg/kg/day)"
6.2E-01
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.62
Antimony
1.31
ug/L
5.0E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.4E-05
(mg/kg/day)
4.0E-04
(mg/kg/day)
0.035
Arsenic
12.8
ug/L
4.9E-05
(mg/kg/day)
1.5E+00
(mg/kg/day)"
7.3E-05
1.4E-04
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.46
Barium
674
ug/L
2.6E-03
(mg/kg/day)
NA
(mg/kg/day)"
7.2E-03
(mg/kg/day)
2.0E-01
(mg/kg/day)
0.036
Beryllium
3.46
ug/L
1.3E-05
(mg/kg/day)
NA
(mg/kg/day)"
3.7E-05
(mg/kg/day)
2.0E-03
(mg/kg/day)
0.019
Cadmium
0.424
ug/L
1.6E-06
(mg/kg/day)
NA
(mg/kg/day)"
4.5E-06
(mg/kg/day)
5.0E-04
(mg/kg/day)
0.0091
Cobalt
63.9
ug/L
2.4E-04
(mg/kg/day)
NA
(mg/kg/day)"
6.8E-04
(mg/kg/day)
3.0E-04
(mg/kg/day)
2.28
Copper
75.2
ug/L
2.9E-04
(mg/kg/day)
NA
(mg/kg/day)"
8.0E-04
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.020
Iron
45400
ug/L
1.7E-01
(mg/kg/day)
NA
(mg/kg/day)"
4.9E-01
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.69
Lead
23.1
ug/L
8.8E-05
(mg/kg/day)
NA
(mg/kg/day)"
2.5E-04
(mg/kg/day)
NA
(mg/kg/day)
Manganese
2525
ug/L
9.7E-03
(mg/kg/day)
NA
(mg/kg/day)"
2.7E-02
(mg/kg/day)
2.4E-02
(mg/kg/day)
1.13
Mercury
0.128
ug/L
4.9E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.4E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0046
Nickel
51.7
ug/L
2.0E-04
(mg/kg/day)
NA
(mg/kg/day)"
5.5E-04
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.028
Selenium
3.1
ug/L
1.2E-05
(mg/kg/day)
NA
(mg/kg/day)"
3.3E-05
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.0066
Thallium
0.539
ug/L
2.1E-06
(mg/kg/day)
NA
(mg/kg/day)"
5.8E-06
(mg/kg/day)
1.0E-05
(mg/kg/day)
0.58
Vanadium
12.3
ug/L
4.7E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.3E-04
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.026
Zinc
378
ug/L
1.4E-03
(mg/kg/day)
NA
(mg/kg/day)"
4.0E-03
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.013
Exp. Route Total
8.1E-05
6.5
Dermal
2-Butanone
1300
ug/L
8.4E-06
(mg/kg/day)
NA
(mg/kg/day)"
2.4E-05
(mg/kg/day)
6.0E-01
(mg/kg/day)
0.000039
2-Hexanone
41
ug/L
1.1E-06
(mg/kg/day)
NA
(mg/kg/day)"
3.2E-06
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.00064
Chloroform
9.4
ug/L
4.0E-07
(mg/kg/day)
3.1E-02
(mg/kg/day)"
1.2E-08
1.1E-06
(mg/kg/day)
1.0E-02
(mg/kg/day)
0.00011
cis-1,2-Dichloroethene
1.88
ug/L
1.1E-07
(mg/kg/day)
NA
(mg/kg/day)"
3.0E-07
(mg/kg/day)
2.0E-03
(mg/kg/day)
0.00015
Methyl Tert-Butyl Ether
15
ug/L
1.7E-07
(mg/kg/day)
1.8E-03
(mg/kg/day)"
3.1E-10
4.8E-07
(mg/kg/day)
NA
(mg/kg/day)
Tetrachloroethene
65.7
ug/L
2.0E-05
(mg/kg/day)
2.1E-03
(mg/kg/day)"
4.1E-08
5.5E-05
(mg/kg/day)
6.0E-03
(mg/kg/day)
0.009
Trichloroethene
10.6
ug/L
8.3E-07
(mg/kg/day)
4.6E-02
(mg/kg/day)"
3.8E-08
2.3E-06
(mg/kg/day)
5.0E-04
(mg/kg/day)
0.0047
Vinyl Chloride
0.57
ug/L
1.6E-08
(mg/kg/day)
7.2E-01
(mg/kg/day)"
1.2E-08
4.6E-08
(mg/kg/day)
3.0E-03
(mg/kg/day)
0.000015
1,4-Dioxane
3.84
ug/L
1.1E-08
(mg/kg/day)
1.0E-01
(mg/kg/day)"
1.1E-09
3.0E-08
(mg/kg/day)
3.0E-02
(mg/kg/day)
0.0000010
Bis(2-ethylhexyl)phthalate
11
ug/L
0.0E+00
(mg/kg/day)
1.4E-02
(mg/kg/day)"
0.0E+00
(mg/kg/day)
2.0E-02
(mg/kg/day)
Caprolactam
2800
ug/L
2.8E-05
(mg/kg/day)
NA
(mg/kg/day)"
7.9E-05
(mg/kg/day)
5.0E-01
(mg/kg/day)
0.00016
Aluminum
57655
ug/L
1.6E-04
(mg/kg/day)
NA
(mg/kg/day)"
4.4E-04
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.00044
Antimony
1.31
ug/L
3.5E-09
(mg/kg/day)
NA
(mg/kg/day)"
9.9E-09
(mg/kg/day)
6.0E-05
(mg/kg/day)
0.00016
Arsenic
12.8
ug/L
3.5E-08
(mg/kg/day)
1.5E+00
(mg/kg/day)"
5.2E-08
9.7E-08
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00032
Barium
674
ug/L
1.8E-06
(mg/kg/day)
NA
(mg/kg/day)"
5.1E-06
(mg/kg/day)
1.4E-02
(mg/kg/day)
0.00036
Beryllium
3.46
ug/L
9.3E-09
(mg/kg/day)
NA
(mg/kg/day)"
2.6E-08
(mg/kg/day)
1.4E-05
(mg/kg/day)
0.0019
Cadmium
0.424
ug/L
1.1E-09
(mg/kg/day)
NA
(mg/kg/day)"
3.2E-09
(mg/kg/day)
2.5E-05
(mg/kg/day)
0.00013
Cobalt
63.9
ug/L
6.9E-08
(mg/kg/day)
NA
(mg/kg/day)"
1.9E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00064
Copper
75.2
ug/L
2.0E-07
(mg/kg/day)
NA
(mg/kg/day)"
5.7E-07
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.000014
Iron
45400
ug/L
1.2E-04
(mg/kg/day)
NA
(mg/kg/day)"
3.4E-04
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.00049
Lead
23.1
ug/L
6.2E-09
(mg/kg/day)
NA
(mg/kg/day)"
1.7E-08
(mg/kg/day)
NA
(mg/kg/day)
Manganese
2525
ug/L
6.8E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.9E-05
(mg/kg/day)
9.6E-04
(mg/kg/day)
0.020
Mercury
0.128
ug/L
3.5E-10
(mg/kg/day)
NA
(mg/kg/day)"
9.7E-10
(mg/kg/day)
2.1E-05
(mg/kg/day)
0.000046
Nickel
51.7
ug/L
2.8E-08
(mg/kg/day)
NA
(mq/kq/dav)
7.8E-08
(mg/kg/day)
8.0E-04
(mg/kg/day)
0.000098
Groundwater
Groundwater
-------
TABLE 7.6.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 3 OF 3
Scenario Timeframe: Future
Receptor Population: Industrial Worker
Receptor Age: Adult
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Groundwater
Groundwater
OWRGC
Dermal
Selenium
3.1
ug/L
8.4E-09
(mg/kg/day)
NA
(mg/kg/day)"1
2.3E-08
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.0000047
Thallium
0.539
ug/L
1.5E-09
(mg/kg/day)
NA
(mg/kg/day)"1
4.1E-09
(mg/kg/day)
1.0E-05
(mg/kg/day)
0.00041
Vanadium
12.3
ug/L
3.3E-08
(mg/kg/day)
NA
(mg/kg/day)"1
9.3E-08
(mg/kg/day)
1.3E-04
(mg/kg/day)
0.00071
Zinc
378
ug/L
6.1E-07
(mg/kg/day)
NA
(mg/kg/day)"1
1.7E-06
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.0000057
Exp. Route Total
1.6E-07
0.040
Exposure Point Total
8.1E-05
6.5
Exposure Medium Total
8.1E-05
6.5
Air
OWR
Inhalation
2-Butanone
1.7E-02
mg/m3
4.1E-03
(mg/m3)
NA
(ug/m3)"1
1.2E-02
(mg/m3)
5.0E+00
(mg/m3)
0.0023
2-Hexanone
6.5E-04
mg/m3
1.6E-04
(mg/m3)
NA
(ug/m3)"1
4.4E-04
(mg/m3)
3.0E-02
(mg/m3)
0.015
Chloroform
4.0E-04
mg/m3
9.8E-05
(mg/m3)
2.3E-05
(ug/m3)"1
2.2E-06
2.7E-04
(mg/m3)
9.8E-02
(mg/m3)
0.0028
cis-1,2-Dichloroethene
8.7E-05
mg/m3
2.1E-05
(mg/m3)
NA
(ug/m3)"1
5.9E-05
(mg/m3)
NA
(mg/m3)
Methyl Tert-Butyl Ether
5.7E-04
mg/m3
1.4E-04
(mg/m3)
2.6E-07
(ug/m3)"1
3.6E-08
3.9E-04
(mg/m3)
3.0E+00
(mg/m3)
0.00013
Tetrachloroethene
2.6E-03
mg/m3
6.2E-04
(mg/m3)
2.6E-07
(ug/m3)"1
1.6E-07
1.7E-03
(mg/m3)
4.0E-02
(mg/m3)
0.044
Trichloroethene
4.5E-04
mg/m3
1.1E-04
(mg/m3)
4.1E-06
(ug/m3)"1
4.5E-07
3.1E-04
(mg/m3)
2.0E-03
(mg/m3)
0.15
Vinyl Chloride
3.2E-05
mg/m3
7.8E-06
(mg/m3)
4.4E-06
(ug/m3)"1
3.4E-08
2.2E-05
(mg/m3)
1.0E-01
(mg/m3)
0.00022
1,4-Dioxane
4.8E-06
mg/m3
1.2E-06
(mg/m3)
5.0E-06
(ug/m3)"1
5.9E-09
3.3E-06
(mg/m3)
3.0E-02
(mg/m3)
0.00011
Bis(2-ethylhexyl)phthalate
0.0E+00
mg/m3
0.0E+00
(mg/m3)
2.4E-06
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Caprolactam
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
2.2E-03
(mg/m3)
Aluminum
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
5.0E-03
(mg/m3)
Antimony
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Arsenic
0.0E+00
mg/m3
0.0E+00
(mg/m3)
4.3E-03
(ug/m3)"1
0.0E+00
(mg/m3)
1.5E-05
(mg/m3)
Barium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
5.0E-04
(mg/m3)
Beryllium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
2.4E-03
(ug/m3)"1
0.0E+00
(mg/m3)
2.0E-05
(mg/m3)
Cadmium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
1.8E-03
(ug/m3)"1
0.0E+00
(mg/m3)
1.0E-05
(mg/m3)
Cobalt
0.0E+00
mg/m3
0.0E+00
(mg/m3)
9.0E-03
(ug/m3)"1
0.0E+00
(mg/m3)
6.0E-06
(mg/m3)
Copper
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Iron
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Lead
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Manganese
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
5.0E-05
(mg/m3)
Mercury
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
3.0E-04
(mg/m3)
Nickel
0.0E+00
mg/m3
0.0E+00
(mg/m3)
2.6E-04
(ug/m3)"1
0.0E+00
(mg/m3)
9.0E-05
(mg/m3)
Selenium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
2.0E-02
(mg/m3)
Thallium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Vanadium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
1.0E-04
(mg/m3)
Zinc
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Exp. Route Total
2.9E-06
0.22
Exposure Point Total
2.9E-06
0.22
Exposure Medium Total
2.9E-06
0.22
Medium Total
8.4E-05
6.7
Total of Receptor Risks Across All Media
8.6E-05
Total of Receptor Hazards Across All Media
7.1
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 7.7.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 3
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Child
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Ingestion
Benzo(a)pyrene
0.252
mg/kg
1.5E-06
(mg/kg/day)
1.0E+00
(mg/kg/day)"
1.5E-06
3.2E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.011
Naphthalene
9.8
mg/kg
1.1E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.3E-04
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.0063
Dieldrin
0.11
mg/kg
1.2E-07
(mg/kg/day)
1.6E+01
(mg/kg/day)"
1.9E-06
1.4E-06
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.028
Aluminum
9940
mg/kg
1.1E-02
(mg/kg/day)
NA
(mg/kg/day)"
1.3E-01
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.13
Antimony
6.48
mg/kg
7.1E-06
(mg/kg/day)
NA
(mg/kg/day)"
8.3E-05
(mg/kg/day)
4.0E-04
(mg/kg/day)
0.21
Arsenic
3.95
mg/kg
2.6E-06
(mg/kg/day)
1.5E+00
(mg/kg/day)"
3.9E-06
3.0E-05
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.10
Cobalt
6.32
mg/kg
6.9E-06
(mg/kg/day)
NA
(mg/kg/day)"
8.1E-05
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.27
Copper
660
mg/kg
7.2E-04
(mg/kg/day)
NA
(mg/kg/day)"
8.4E-03
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.21
Iron
19200
mg/kg
2.1E-02
(mg/kg/day)
NA
(mg/kg/day)"
2.5E-01
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.35
Lead
71.4
mg/kg
7.8E-05
(mg/kg/day)
NA
(mg/kg/day)"
9.1E-04
(mg/kg/day)
NA
(mg/kg/day)
Manganese
388
mg/kg
4.3E-04
(mg/kg/day)
NA
(mg/kg/day)"
5.0E-03
(mg/kg/day)
2.4E-02
(mg/kg/day)
0.21
Thallium
2.13
mg/kg
2.3E-06
(mg/kg/day)
NA
(mg/kg/day)"
2.7E-05
(mg/kg/day)
1.0E-05
(mg/kg/day)
2.7
Vanadium
23.6
mg/kg
2.6E-05
(mg/kg/day)
NA
(mg/kg/day)"
3.0E-04
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.060
Zinc
380
mg/kg
4.2E-04
(mg/kg/day)
NA
(mg/kg/day)"
4.9E-03
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.016
Exp. Route Total
7.3E-06
4.3
Dermal
Benzo(a)pyrene
0.252
mg/kg
4.5E-07
(mg/kg/day)
1.0E+00
(mg/kg/day)"
4.5E-07
9.9E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0033
Naphthalene
9.8
mg/kg
3.3E-06
(mg/kg/day)
NA
(mg/kg/day)"
3.9E-05
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.0019
Dieldrin
0.11
mg/kg
2.9E-08
(mg/kg/day)
1.6E+01
(mg/kg/day)"
4.6E-07
3.3E-07
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.0067
Aluminum
9940
mg/kg
2.6E-04
(mg/kg/day)
NA
(mg/kg/day)"
3.0E-03
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.0030
Antimony
6.48
mg/kg
1.7E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.0E-06
(mg/kg/day)
6.0E-05
(mg/kg/day)
0.033
Arsenic
3.95
mg/kg
3.1E-07
(mg/kg/day)
1.5E+00
(mg/kg/day)"
4.6E-07
3.6E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.012
Cobalt
6.32
mg/kg
1.6E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.9E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0064
Copper
660
mg/kg
1.7E-05
(mg/kg/day)
NA
(mg/kg/day)"
2.0E-04
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.0050
Iron
19200
mg/kg
5.0E-04
(mg/kg/day)
NA
(mg/kg/day)"
5.8E-03
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.0083
Lead
71.4
mg/kg
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)"
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)
Manganese
388
mg/kg
1.0E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.2E-04
(mg/kg/day)
9.6E-04
(mg/kg/day)
0.12
Thallium
2.13
mg/kg
5.5E-08
(mg/kg/day)
NA
(mg/kg/day)"
6.5E-07
(mg/kg/day)
1.0E-05
(mg/kg/day)
0.065
Vanadium
23.6
mg/kg
6.1E-07
(mg/kg/day)
NA
(mg/kg/day)"
7.2E-06
(mg/kg/day)
1.3E-04
(mg/kg/day)
0.055
Zinc
380
mg/kg
9.9E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.2E-04
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.00038
Exp. Route Total
1.4E-06
0.32
Exposure Point Total
8.7E-06
4.6
Exposure Medium Total
8.7E-06
4.6
Air
OWR
Inhalation
Benzo(a)pyrene
7.8E-11
mg/m3
3.4E-11
(mg/m3)
6.0E-04
(ug/m3)"1
2.0E-11
7.5E-11
(mg/m3)
2.0E-06
(mg/m3)
0.000037
Naphthalene
1.7E-04
mg/m3
1.4E-05
(mg/m3)
3.4E-05
(ug/m3)"1
4.6E-07
1.6E-04
(mg/m3)
3.0E-03
(mg/m3)
0.053
Dieldrin
3.4E-11
mg/m3
2.8E-12
(mg/m3)
4.6E-03
(ug/m3)"1
1.3E-11
3.3E-11
(mg/m3)
NA
(mg/m3)
Aluminum
3.1E-06
mg/m3
2.5E-07
(mg/m3)
NA
(ug/m3)"1
2.9E-06
(mg/m3)
5.0E-03
(mg/m3)
0.00059
Antimony
2.0E-09
mg/m3
1.6E-10
(mg/m3)
NA
(ug/m3)"1
1.9E-09
(mg/m3)
NA
(mg/m3)
Arsenic
1.2E-09
mg/m3
1.0E-10
(mg/m3)
4.3E-03
(ug/m3)"1
4.3E-10
1.2E-09
(mg/m3)
1.5E-05
(mg/m3)
0.000078
Cobalt
2.0E-09
mg/m3
1.6E-10
(mg/m3)
9.0E-03
(ug/m3)"1
1.4E-09
1.9E-09
(mg/m3)
6.0E-06
(mg/m3)
0.00031
Copper
2.0E-07
mg/m3
1.7E-08
(mg/m3)
NA
(ug/m3)"1
2.0E-07
(mg/m3)
NA
(mg/m3)
Iron
5.9E-06
mg/m3
4.9E-07
(mg/m3)
NA
(ug/m3)"1
5.7E-06
(mg/m3)
NA
(mg/m3)
Lead
2.2E-08
mg/m3
1.8E-09
(mg/m3)
NA
(ug/m3)"1
2.1E-08
(mg/m3)
NA
(mg/m3)
Manganese
1.2E-07
mg/m3
9.8E-09
(mg/m3)
NA
(ug/m3)"1
1.1E-07
(mg/m3)
5.0E-05
(mg/m3)
0.0023
Thallium
6.6E-10
mg/m3
5.4E-11
(mg/m3)
NA
(ug/m3)"1
6.3E-10
(mg/m3)
NA
(mg/m3)
Vanadium
7.3E-09
mg/m3
6.0E-10
(mg/m3)
NA
(ug/m3)"1
7.0E-09
(mg/m3)
1.0E-04
(mg/m3)
0.000070
Zinc
1.2E-07
mg/m3
9.6E-09
(mg/m3)
NA
(ug/m3)"1
1.1E-07
(mg/m3)
NA
(mg/m3)
Exp. Route Total
4.6E-07
0.056
Exposure Point Total
4.6E-07
0.056
Exposure Medium Total
4.6E-07
0.056
Medium Total
9.1E-06
4.7
-------
TABLE 7.7.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 3
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Child
Exposure Medium
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Ingestion
2-Butanone
1300
ug/L
5.6E-03
(mg/kg/day)
NA
(mg/kg/day)"
6.5E-02
(mg/kg/day)
6.0E-01
(mg/kg/day)
0.11
2-Hexanone
41
ug/L
1.8E-04
(mg/kg/day)
NA
(mg/kg/day)"
2.0E-03
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.41
Chloroform
9.4
ug/L
4.0E-05
(mg/kg/day)
3.1E-02
(mg/kg/day)"
1.2E-06
4.7E-04
(mg/kg/day)
1.0E-02
(mg/kg/day)
0.047
cis-1,2-Dichloroethene
1.88
ug/L
8.0E-06
(mg/kg/day)
NA
(mg/kg/day)"
9.4E-05
(mg/kg/day)
2.0E-03
(mg/kg/day)
0.047
Methyl Tert-Butyl Ether
15
ug/L
6.4E-05
(mg/kg/day)
1.8E-03
(mg/kg/day)"
1.2E-07
7.5E-04
(mg/kg/day)
NA
(mg/kg/day)
Tetrachloroethene
65.7
ug/L
2.8E-04
(mg/kg/day)
2.1E-03
(mg/kg/day)"
5.9E-07
3.3E-03
(mg/kg/day)
6.0E-03
(mg/kg/day)
0.55
Trichloroethene (Mutagenic)
10.6
ug/L
2.4E-04
(mg/kg/day)
9.3E-03
(mg/kg/day)"
2.2E-06
5.3E-04
(mg/kg/day)
NA
(mg/kg/day)
Trichloroethene (Nonmutagenic
10.6
ug/L
4.5E-05
(mg/kg/day)
3.7E-02
(mg/kg/day)"
1.7E-06
5.3E-04
(mg/kg/day)
5.0E-04
(mg/kg/day)
1.06
Vinyl Chloride
0.57
ug/L
3.2E-05
(mg/kg/day)
7.2E-01
(mg/kg/day)"
2.3E-05
2.8E-05
(mg/kg/day)
3.0E-03
(mg/kg/day)
0.0095
1,4-Dioxane
3.84
ug/L
1.6E-05
(mg/kg/day)
1.0E-01
(mg/kg/day)"
1.6E-06
1.9E-04
(mg/kg/day)
3.0E-02
(mg/kg/day)
0.0064
Bis(2-ethylhexyl)phthalate
11
ug/L
4.7E-05
(mg/kg/day)
1.4E-02
(mg/kg/day)"
6.6E-07
5.5E-04
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.027
Caprolactam
2800
ug/L
1.2E-02
(mg/kg/day)
NA
(mg/kg/day)"
1.4E-01
(mg/kg/day)
5.0E-01
(mg/kg/day)
0.28
Aluminum
57655
ug/L
2.5E-01
(mg/kg/day)
NA
(mg/kg/day)"
2.9E+00
(mg/kg/day)
1.0E+00
(mg/kg/day)
2.9
Antimony
1.31
ug/L
5.6E-06
(mg/kg/day)
NA
(mg/kg/day)"
6.5E-05
(mg/kg/day)
4.0E-04
(mg/kg/day)
0.16
Arsenic
12.8
ug/L
5.5E-05
(mg/kg/day)
1.5E+00
(mg/kg/day)"
8.2E-05
6.4E-04
(mg/kg/day)
3.0E-04
(mg/kg/day)
2.1
Barium
674
ug/L
2.9E-03
(mg/kg/day)
NA
(mg/kg/day)"
3.4E-02
(mg/kg/day)
2.0E-01
(mg/kg/day)
0.17
Beryllium
3.46
ug/L
1.5E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.7E-04
(mg/kg/day)
2.0E-03
(mg/kg/day)
0.086
Cadmium
0.424
ug/L
1.8E-06
(mg/kg/day)
NA
(mg/kg/day)"
2.1E-05
(mg/kg/day)
5.0E-04
(mg/kg/day)
0.042
Cobalt
63.9
ug/L
2.7E-04
(mg/kg/day)
NA
(mg/kg/day)"
3.2E-03
(mg/kg/day)
3.0E-04
(mg/kg/day)
10.6
Copper
75.2
ug/L
3.2E-04
(mg/kg/day)
NA
(mg/kg/day)"
3.7E-03
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.094
Iron
45400
ug/L
1.9E-01
(mg/kg/day)
NA
(mg/kg/day)"
2.3E+00
(mg/kg/day)
7.0E-01
(mg/kg/day)
3.2
Lead
23.1
ug/L
9.9E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.2E-03
(mg/kg/day)
NA
(mg/kg/day)
Manganese
2525
ug/L
1.1E-02
(mg/kg/day)
NA
(mg/kg/day)"
1.3E-01
(mg/kg/day)
2.4E-02
(mg/kg/day)
5.2
Mercury
0.128
ug/L
5.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
6.4E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.021
Nickel
51.7
ug/L
2.2E-04
(mg/kg/day)
NA
(mg/kg/day)"
2.6E-03
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.13
Selenium
3.1
ug/L
1.3E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.5E-04
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.031
Thallium
0.539
ug/L
2.3E-06
(mg/kg/day)
NA
(mg/kg/day)"
2.7E-05
(mg/kg/day)
1.0E-05
(mg/kg/day)
2.7
Vanadium
12.3
ug/L
5.3E-05
(mg/kg/day)
NA
(mg/kg/day)"
6.1E-04
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.12
Zinc
378
ug/L
1.6E-03
(mg/kg/day)
NA
(mg/kg/day)"
1.9E-02
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.063
Exp. Route Total
1.1E-04
30
Dermal
2-Butanone
1300
ug/L
4.6E-05
(mg/kg/day)
NA
(mg/kg/day)"
5.3E-04
(mg/kg/day)
6.0E-01
(mg/kg/day)
0.00089
2-Hexanone
41
ug/L
6.4E-06
(mg/kg/day)
NA
(mg/kg/day)"
7.4E-05
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.015
Chloroform
9.4
ug/L
3.2E-06
(mg/kg/day)
3.1E-02
(mg/kg/day)"
9.9E-08
3.7E-05
(mg/kg/day)
1.0E-02
(mg/kg/day)
0.0037
cis-1,2-Dichloroethene
1.88
ug/L
8.9E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.0E-05
(mg/kg/day)
2.0E-03
(mg/kg/day)
0.0052
Methyl Tert-Butyl Ether
15
ug/L
1.3E-06
(mg/kg/day)
1.8E-03
(mg/kg/day)"
2.3E-09
1.5E-05
(mg/kg/day)
NA
(mg/kg/day)
Tetrachloroethene
65.7
ug/L
1.5E-04
(mg/kg/day)
2.1E-03
(mg/kg/day)"
3.1E-07
1.7E-03
(mg/kg/day)
6.0E-03
(mg/kg/day)
0.29
Trichloroethene (Mutagenic)
10.6
ug/L
3.5E-05
(mg/kg/day)
9.3E-03
(mg/kg/day)"
3.3E-07
7.7E-05
(mg/kg/day)
NA
(mg/kg/day)
Trichloroethene (Nonmutagenic
10.6
ug/L
6.6E-06
(mg/kg/day)
3.7E-02
(mg/kg/day)"
2.4E-07
7.7E-05
(mg/kg/day)
5.0E-04
(mg/kg/day)
0.15
Vinyl Chloride
0.57
ug/L
2.2E-06
(mg/kg/day)
7.2E-01
(mg/kg/day)"
1.6E-06
1.9E-06
(mg/kg/day)
3.0E-03
(mg/kg/day)
0.00064
1,4-Dioxane
3.84
ug/L
5.2E-08
(mg/kg/day)
1.0E-01
(mg/kg/day)"
5.2E-09
6.0E-07
(mg/kg/day)
3.0E-02
(mg/kg/day)
0.000020
Bis(2-ethylhexyl)phthalate
11
ug/L
0.0E+00
(mg/kg/day)
1.4E-02
(mg/kg/day)"
0.0E+00
(mg/kg/day)
2.0E-02
(mg/kg/day)
Caprolactam
2800
ug/L
1.3E-04
(mg/kg/day)
NA
(mg/kg/day)"
1.6E-03
(mg/kg/day)
5.0E-01
(mg/kg/day)
0.0031
Aluminum
57655
ug/L
1.1E-03
(mg/kg/day)
NA
(mg/kg/day)"
1.3E-02
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.013
Antimony
1.31
ug/L
2.5E-08
(mg/kg/day)
NA
(mg/kg/day)"
2.9E-07
(mg/kg/day)
6.0E-05
(mg/kg/day)
0.0048
Arsenic
12.8
ug/L
2.4E-07
(mg/kg/day)
1.5E+00
(mg/kg/day)"
3.6E-07
2.8E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0094
Barium
674
ug/L
1.3E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.5E-04
(mg/kg/day)
1.4E-02
(mg/kg/day)
0.011
Beryllium
3.46
ug/L
6.5E-08
(mg/kg/day)
NA
(mg/kg/day)"
7.6E-07
(mg/kg/day)
1.4E-05
(mg/kg/day)
0.054
Cadmium
0.424
ug/L
8.0E-09
(mg/kg/day)
NA
(mg/kg/day)"
9.3E-08
(mg/kg/day)
2.5E-05
(mg/kg/day)
0.0037
Cobalt
63.9
ug/L
4.8E-07
(mg/kg/day)
NA
(mg/kg/day)"
5.6E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.019
Copper
75.2
ug/L
1.4E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.7E-05
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.00041
Iron
45400
ug/L
8.6E-04
(mg/kg/day)
NA
(mg/kg/day)"
1.0E-02
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.014
Lead
23.1
ug/L
4.4E-08
(mg/kg/day)
NA
(mg/kg/day)"
5.1E-07
(mg/kg/day)
NA
(mg/kg/day)
Manganese
2525
ug/L
4.8E-05
(mg/kg/day)
NA
(mq/kq/dav)
5.5E-04
(mg/kg/day)
9.6E-04
(mg/kg/day)
0.58
Groundwater
Groundwater
-------
TABLE 7.7.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 3 OF 3
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Child
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Groundwater
Groundwater
OWRGC
Dermal
Mercury
0.128
ug/L
2.4E-09
(mg/kg/day)
NA
(mg/kg/day)"
2.8E-08
(mg/kg/day)
2.1E-05
(mg/kg/day)
0.0013
Nickel
51.7
ug/L
1.9E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.3E-06
(mg/kg/day)
8.0E-04
(mg/kg/day)
0.0028
Selenium
3.1
ug/L
5.8E-08
(mg/kg/day)
NA
(mg/kg/day)"
6.8E-07
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.00014
Thallium
0.539
ug/L
1.0E-08
(mg/kg/day)
NA
(mg/kg/day)"
1.2E-07
(mg/kg/day)
1.0E-05
(mg/kg/day)
0.012
Vanadium
12.3
ug/L
2.3E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.7E-06
(mg/kg/day)
1.3E-04
(mg/kg/day)
0.021
Zinc
378
ug/L
4.3E-06
(mg/kg/day)
NA
(mg/kg/day)"
5.0E-05
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.00017
Exp. Route Total
2.9E-06
1.21
Exposure Point Total
1.2E-04
31
Exposure Medium Total
1.2E-04
31
Medium Total
1.2E-04
31
Sediment
Sediment
OWR
Ingestion
Cobalt
14
mg/kg
2.3E-06
(mg/kg/day)
NA
(mg/kg/day)"1
2.7E-05
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.09
Nickel
1500
mg/kg
2.4E-04
(mg/kg/day)
NA
(mg/kg/day)"1
2.8E-03
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.14
Exp. Route Total
0.23
Dermal
Cobalt
14
mg/kg
5.4E-08
(mg/kg/day)
NA
(mg/kg/day)"1
6.3E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00
Nickel
1500
mg/kg
5.8E-06
(mg/kg/day)
NA
(mg/kg/day)"1
6.8E-05
(mg/kg/day)
8.0E-04
(mg/kg/day)
0.085
Exp. Route Total
0.09
Exposure Point Total
0.32
Exposure Medium Total
0.32
Medium Total
0.32
Total of Receptor Risks Across All Media
1.3E-04
Total of Receptor Hazards Across All Media
36
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 7.8.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 4
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Adult
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Ingestion
Benzo(a)pyrene
0.252
mg/kg
1.7E-07
(mg/kg/day)
1.0E+00
(mg/kg/day)"
1.7E-07
3.0E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0010
Naphthalene
9.8
mg/kg
3.4E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.2E-05
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.00059
Dieldrin
0.11
mg/kg
3.8E-08
(mg/kg/day)
1.6E+01
(mg/kg/day)"
6.0E-07
1.3E-07
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.0026
Aluminum
9940
mg/kg
3.4E-03
(mg/kg/day)
NA
(mg/kg/day)"1
1.2E-02
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.012
Antimony
6.48
mg/kg
2.2E-06
(mg/kg/day)
NA
(mg/kg/day)"
7.8E-06
(mg/kg/day)
4.0E-04
(mg/kg/day)
0.019
Arsenic
3.95
mg/kg
8.1E-07
(mg/kg/day)
1.5E+00
(mg/kg/day)"
1.2E-06
2.8E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0095
Cobalt
6.32
mg/kg
2.2E-06
(mg/kg/day)
NA
(mg/kg/day)"
7.6E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.025
Copper
660
mg/kg
2.3E-04
(mg/kg/day)
NA
(mg/kg/day)"
7.9E-04
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.020
Iron
19200
mg/kg
6.6E-03
(mg/kg/day)
NA
(mg/kg/day)"
2.3E-02
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.033
Lead
71.4
mg/kg
2.4E-05
(mg/kg/day)
NA
(mg/kg/day)"
8.6E-05
(mg/kg/day)
NA
(mg/kg/day)
Manganese
388
mg/kg
1.3E-04
(mg/kg/day)
NA
(mg/kg/day)"
4.7E-04
(mg/kg/day)
2.4E-02
(mg/kg/day)
0.019
Thallium
2.13
mg/kg
7.3E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.6E-06
(mg/kg/day)
1.0E-05
(mg/kg/day)
0.26
Vanadium
23.6
mg/kg
8.1E-06
(mg/kg/day)
NA
(mg/kg/day)"
2.8E-05
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.0057
Zinc
380
mg/kg
1.3E-04
(mg/kg/day)
NA
(mg/kg/day)"
4.6E-04
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.0015
Exp. Route Total
2.0E-06
0.40
Dermal
Benzo(a)pyrene
0.252
mg/kg
9.5E-08
(mg/kg/day)
1.0E+00
(mg/kg/day)"
9.5E-08
1.7E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00055
Naphthalene
9.8
mg/kg
1.8E-06
(mg/kg/day)
NA
(mg/kg/day)"
6.4E-06
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.00032
Dieldrin
0.11
mg/kg
1.6E-08
(mg/kg/day)
1.6E+01
(mg/kg/day)"
2.5E-07
5.6E-08
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.0011
Aluminum
9940
mg/kg
1.4E-04
(mg/kg/day)
NA
(mg/kg/day)"
5.0E-04
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.00050
Antimony
6.48
mg/kg
9.4E-08
(mg/kg/day)
NA
(mg/kg/day)"
3.3E-07
(mg/kg/day)
6.0E-05
(mg/kg/day)
0.0055
Arsenic
3.95
mg/kg
1.7E-07
(mg/kg/day)
1.5E+00
(mg/kg/day)"
2.6E-07
6.0E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0020
Cobalt
6.32
mg/kg
9.1E-08
(mg/kg/day)
NA
(mg/kg/day)"
3.2E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0011
Copper
660
mg/kg
9.5E-06
(mg/kg/day)
NA
(mg/kg/day)"
3.3E-05
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.00084
Iron
19200
mg/kg
2.8E-04
(mg/kg/day)
NA
(mg/kg/day)"
9.7E-04
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.0014
Lead
71.4
mg/kg
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)"
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)
Manganese
388
mg/kg
5.6E-06
(mg/kg/day)
NA
(mg/kg/day)"
2.0E-05
(mg/kg/day)
9.6E-04
(mg/kg/day)
0.020
Thallium
2.13
mg/kg
3.1E-08
(mg/kg/day)
NA
(mg/kg/day)"
1.1E-07
(mg/kg/day)
1.0E-05
(mg/kg/day)
0.011
Vanadium
23.6
mg/kg
3.4E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.2E-06
(mg/kg/day)
1.3E-04
(mg/kg/day)
0.0092
Zinc
380
mg/kg
5.5E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.9E-05
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.000064
Exp. Route Total
6.1E-07
0.054
Exposure Point Total
2.6E-06
0.46
Exposure Medium Total
2.6E-06
0.46
Air
OWR
Inhalation
Benzo(a)pyrene
7.8E-11
mg/m3
4.3E-11
(mg/m3)
6.0E-04
(ug/m3)"1
2.6E-11
7.5E-11
(mg/m3)
2.0E-06
(mg/m3)
0.000037
Naphthalene
1.7E-04
mg/m3
4.5E-05
(mg/m3)
3.4E-05
(ug/m3)"1
1.5E-06
1.6E-04
(mg/m3)
3.0E-03
(mg/m3)
0.053
Dieldrin
3.4E-11
mg/m3
9.3E-12
(mg/m3)
4.6E-03
(ug/m3)"1
4.3E-11
3.3E-11
(mg/m3)
NA
(mg/m3)
-
Aluminum
3.1E-06
mg/m3
8.4E-07
(mg/m3)
NA
(ug/m3)"1
2.9E-06
(mg/m3)
5.0E-03
(mg/m3)
0.00059
Antimony
2.0E-09
mg/m3
5.5E-10
(mg/m3)
NA
(ug/m3)"1
1.9E-09
(mg/m3)
NA
(mg/m3)
-
Arsenic
1.2E-09
mg/m3
3.3E-10
(mg/m3)
4.3E-03
(ug/m3)"1
1.4E-09
1.2E-09
(mg/m3)
1.5E-05
(mg/m3)
0.000078
Cobalt
2.0E-09
mg/m3
5.3E-10
(mg/m3)
9.0E-03
(ug/m3)"1
4.8E-09
1.9E-09
(mg/m3)
6.0E-06
(mg/m3)
0.00031
Copper
2.0E-07
mg/m3
5.6E-08
(mg/m3)
NA
(ug/m3)"1
2.0E-07
(mg/m3)
NA
(mg/m3)
-
Iron
5.9E-06
mg/m3
1.6E-06
(mg/m3)
NA
(ug/m3)"1
5.7E-06
(mg/m3)
NA
(mg/m3)
-
Lead
2.2E-08
mg/m3
6.0E-09
(mg/m3)
NA
(ug/m3)"1
2.1E-08
(mg/m3)
NA
(mg/m3)
-
Manganese
1.2E-07
mg/m3
3.3E-08
(mg/m3)
NA
(ug/m3)"1
1.1E-07
(mg/m3)
5.0E-05
(mg/m3)
0.0023
Thallium
6.6E-10
mg/m3
1.8E-10
(mg/m3)
NA
(ug/m3)"1
6.3E-10
(mg/m3)
NA
(mg/m3)
-
Vanadium
7.3E-09
mg/m3
2.0E-09
(mg/m3)
NA
(ug/m3)"1
7.0E-09
(mg/m3)
1.0E-04
(mg/m3)
0.000070
Zinc
1.2E-07
mg/m3
3.2E-08
(mg/m3)
NA
(ug/m3)"1
1.1E-07
(mg/m3)
NA
(mg/m3)
-
Exp. Route Total
1.5E-06
0.056
Exposure Point Total
1.5E-06
0.056
Exposure Medium Total
1.5E-06
0.056
Medium Total
4.1E-06
0.51
-------
TABLE 7.8.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 4
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Adult
Exposure Medium
Chemical of
Potential Concern
Cancer Risk Calculations
Intake/Exposure Concentration
Value
Units
CSF/Unit Risk
Units
Non-Cancer Hazard Calculations
Intake/Exposure Concentration
Value
Units
Hazard Quotient
Value
Units
2-Butanone
2-Hexanone
Chloroform
cis-1,2-Dichloroethene
Methyl Tert-Butyl Ether
Tetrachloroethene
Trichloroethene (Mutagenic)
Trichloroethene (Nonmutagenic)
Vinyl Chloride
1,4-Dioxane
Bis(2-ethylhexyl)phthalate
Caprolactam
Aluminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Cobalt
Copper
Iron
Lead
Manganese
Mercury
Nickel
Selenium
Thallium
Vanadium
Zinc
65.7
10.6
10.6
0.57
3.84
11
2800
57655
1.31
12.8
674
3.46
0.424
63.9
75.2
45400
23.1
2525
0.128
51.7
3.1
0.539
12.3
378
2-Butanone
2-Hexanone
Chloroform
cis-1,2-Dichloroethene
Methyl Tert-Butyl Ether
Tetrachloroethene
Trichloroethene (Mutagenic)
Trichloroethene (Nonmutagenic)
Vinyl Chloride
1,4-Dioxane
Bis(2-ethylhexyl)phthalate
Caprolactam
Aluminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Cobalt
Copper
Iron
Lead
Manganese
65.7
10.6
10.6
0.57
3.84
11
2800
57655
1.31
12.8
674
3.46
0.424
63.9
75.2
45400
23.1
2525
1.1E-02
3.5E-04
8.0E-05
1.6E-05
1.3E-04
5.6E-04
1.8E-04
9.1E-05
4.9E-06
3.3E-05
9.4E-05
2.4E-02
4.9E-01
1.1E-05
1.1E-04
5.8E-03
3.0E-05
3.6E-06
5.5E-04
6.4E-04
3.9E-01
2.0E-04
2.2E-02
1.1E-06
4.4E-04
2.7E-05
4.6E-06
1.1E-04
3.2E-03
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
NA
1.8E-03
2.1E-03
9.3E-03
3.7E-02
7.2E-01
1.0E-01
1.4E-02
NA
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/da^
9.2E-05
1.2E-05
4.2E-06
1.1E-06
1.8E-06
2.1E-04
1.8E-05
8.8E-06
1.8E-07
1.1E-07
0.0E+00
3.0E-04
2.8E-03
6.3E-08
6.1E-07
3.2E-05
1.7E-07
2.0E-08
1.2E-06
3.6E-06
2.2E-03
1.1E-07
1.2E-04
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
(mg/kg/day)
NA
1.8E-03
2.1E-03
9.3E-03
3.7E-02
7.2E-01
1.0E-01
1.4E-02
NA
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mq/kq/das
2.3E-07
1.2E-06
1.7E-06
3.4E-06
3.5E-06
3.3E-06
1.3E-06
3.9E-02
1.2E-03
2.8E-04
5.6E-05
4.5E-04
2.0E-03
3.2E-04
3.2E-04
1.7E-05
1.2E-04
3.3E-04
8.4E-02
1.7E+00
3.9E-05
3.8E-04
2.0E-02
1.0E-04
1.3E-05
1.9E-03
2.3E-03
1.4E+00
6.9E-04
7.6E-02
3.8E-06
1.5E-03
9.3E-05
1.6E-05
3.7E-04
1.1E-02
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
3.3E-09
4.3E-07
1.6E-07
3.2E-07
1.3E-07
1.1E-08
3.2E-04
4.2E-05
1.5E-05
3.9E-06
6.4E-06
7.2E-04
3.1E-05
3.1E-05
6.3E-07
4.0E-07
0.0E+00
1.0E-03
9.6E-03
2.2E-07
2.1E-06
1.1E-04
5.8E-07
7.1E-08
4.3E-06
1.3E-05
7.6E-03
3.9E-07
4.2E-04
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
6.0E-01
5.0E-03
1.0E-02
2.0E-03
NA
6.0E-03
NA
5.0E-04
3.0E-03
3.0E-02
2.0E-02
5.0E-01
1.0E+00
4.0E-04
3.0E-04
2.0E-01
2.0E-03
5.0E-04
3.0E-04
4.0E-02
7.0E-01
NA
2.4E-02
3.0E-04
2.0E-02
5.0E-03
1.0E-05
5.0E-03
3.0E-01
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
6.0E-01
5.0E-03
1.0E-02
2.0E-03
NA
6.0E-03
NA
5.0E-04
3.0E-03
3.0E-02
2.0E-02
5.0E-01
1.0E+00
6.0E-05
3.0E-04
1.4E-02
1.4E-05
2.5E-05
3.0E-04
4.0E-02
7.0E-01
NA
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
mg/kg/day
0.065
0.25
0.028
0.028
0.64
0.0057
0.0038
0.016
0.17
1.7
0.10
0.052
0.025
0.013
0.077
0.019
1.6
0.074
0.038
18
0.00054
0.0084
0.0015
0.0019
0.06
0.00021
0.000013
0.0021
0.0096
0.0037
0.0071
0.0081
0.041
0.0028
0.014
0.00031
0.011
-------
TABLE 7.8.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 3 OF 4
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Adult
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Groundwater
Groundwater
OWRGC
Dermal
Mercury
0.128
ug/L
6.1E-09
(mg/kg/day)
NA
(mg/kg/day)"
2.1E-08
(mg/kg/day)
2.1E-05
(mg/kg/day)
0.0010
Nickel
51.7
ug/L
4.9E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.7E-06
(mg/kg/day)
8.0E-04
(mg/kg/day)
0.0022
Selenium
3.1
ug/L
1.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
5.2E-07
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.00010
Thallium
0.539
ug/L
2.6E-08
(mg/kg/day)
NA
(mg/kg/day)"
9.0E-08
(mg/kg/day)
1.0E-05
(mg/kg/day)
0.0090
Vanadium
12.3
ug/L
5.9E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.1E-06
(mg/kg/day)
1.3E-04
(mg/kg/day)
0.016
Zinc
378
ug/L
1.1E-05
(mg/kg/day)
NA
(mg/kg/day)"
3.8E-05
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.00013
Exp. Route Total
2.1E-06
0.76
Exposure Point Total
1.8E-04
19
Exposure Medium Total
1.8E-04
19
Air
OWR
Inhalation
2-Butanone
2.2E-01
mg/m3
6.0E-02
(mg/m3)
NA
(ug/m3)"1
2.1E-01
(mg/m3)
5.0E+00
(mg/m3)
0.042
2-Hexanone
8.4E-03
mg/m3
2.3E-03
(mg/m3)
NA
(ug/m3)"1
8.1E-03
(mg/m3)
3.0E-02
(mg/m3)
0.27
Chloroform
5.2E-03
mg/m3
1.4E-03
(mg/m3)
2.3E-05
(ug/m3)"1
3.3E-05
5.0E-03
(mg/m3)
9.8E-02
(mg/m3)
0.051
cis-1,2-Dichloroethene
1.1E-03
mg/m3
3.1E-04
(mg/m3)
NA
(ug/m3)"1
1.1E-03
(mg/m3)
NA
(mg/m3)
-
Methyl Tert-Butyl Ether
7.4E-03
mg/m3
2.0E-03
(mg/m3)
2.6E-07
(ug/m3)"1
5.3E-07
7.1E-03
(mg/m3)
3.0E+00
(mg/m3)
0.0024
Tetrachloroethene
3.3E-02
mg/m3
9.1E-03
(mg/m3)
2.6E-07
(ug/m3)"1
2.4E-06
3.2E-02
(mg/m3)
4.0E-02
(mg/m3)
0.79
Trichloroethene (Mutagenic)
5.8E-03
mg/m3
3.2E-03
(mg/m3)
1.0E-06
(ug/m3)"1
3.2E-06
5.6E-03
(mg/m3)
NA
(mg/m3)
-
Trichloroethene (Nonmutagenic)
5.8E-03
mg/m3
1.6E-03
(mg/m3)
3.1E-06
(ug/m3)"1
4.9E-06
5.6E-03
(mg/m3)
2.0E-03
(mg/m3)
2.8
Vinyl Chloride
4.1E-04
mg/m3
1.1E-04
(mg/m3)
4.4E-06
(ug/m3)"1
5.0E-07
4.0E-04
(mg/m3)
1.0E-01
(mg/m3)
0.0040
1,4-Dioxane
6.3E-05
mg/m3
1.7E-05
(mg/m3)
5.0E-06
(ug/m3)"1
8.6E-08
6.0E-05
(mg/m3)
3.0E-02
(mg/m3)
0.0020
Bis(2-ethylhexyl)phthalate
0.0E+00
mg/m3
0.0E+00
(mg/m3)
2.4E-06
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
-
Caprolactam
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
2.2E-03
(mg/m3)
-
Aluminum
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
5.0E-03
(mg/m3)
-
Antimony
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
-
Arsenic
0.0E+00
mg/m3
0.0E+00
(mg/m3)
4.3E-03
(ug/m3)"1
0.0E+00
(mg/m3)
1.5E-05
(mg/m3)
-
Barium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
5.0E-04
(mg/m3)
-
Beryllium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
2.4E-03
(ug/m3)"1
0.0E+00
(mg/m3)
2.0E-05
(mg/m3)
-
Cadmium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
1.8E-03
(ug/m3)"1
0.0E+00
(mg/m3)
1.0E-05
(mg/m3)
-
Cobalt
0.0E+00
mg/m3
0.0E+00
(mg/m3)
9.0E-03
(ug/m3)"1
0.0E+00
(mg/m3)
6.0E-06
(mg/m3)
-
Copper
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
-
Iron
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
-
Lead
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
-
Manganese
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
5.0E-05
(mg/m3)
-
Mercury
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
3.0E-04
(mg/m3)
-
Nickel
0.0E+00
mg/m3
0.0E+00
(mg/m3)
2.6E-04
(ug/m3)"1
0.0E+00
(mg/m3)
9.0E-05
(mg/m3)
-
Selenium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
2.0E-02
(mg/m3)
-
Thallium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
-
Vanadium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
1.0E-04
(mg/m3)
-
Zinc
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
-
Exp. Route Total
4.4E-05
3.9
Exposure Point Total
4.4E-05
3.9
Exposure Medium Total
4.4E-05
3.9
Medium Total
2.3E-04
23
-------
TABLE 7.8.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 4 OF 4
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Adult
Medium
Exposure Medium
Exposure Point Exposure Route Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
I |
Value
Units
Value
Units
Value
Units
Value
Units
Sediment
Sediment
OWR I Ingestion j Cobalt
14
mg/kg
7.1E-07
(mg/kg/day)
NA
(mg/kg/day)"1
2.5E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.008
[Nickel
1500
mg/kg
7.6E-05
(mg/kg/day)
NA
(mg/kg/day)"1
2.7E-04
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.013
| Exp. Route Total jj
0.022
| Dermal [Cobalt
14
mg/kg
3.0E-08
(mg/kg/day)
NA
(mg/kg/day)"1
1.1E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.000
[Nickel
1500
mg/kg
3.2E-06
(mg/kg/day)
NA
(mg/kg/day)"1
1.1E-05
(mg/kg/day)
8.0E-04
(mg/kg/day)
0.014
|j Exp. Route Total |f
0.014
Exposure Point Total
0.036
Exposure Medium Total
0.036
Medium Total
0.036
Total of Receptor Risks Across All Media
2.3E-04
Total of Receptor Hazards Across All Media
23
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 7.9.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 4
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Ingestion
Benzo(a)pyrene
0.252
mg/kg
1.6E-06
(mg/kg/day)
1.0E+00
(mg/kg/day)"
1.6E-06
Naphthalene
9.8
mg/kg
1.4E-05
(mg/kg/day)
NA
(mg/kg/day)"
Dieldrin
0.11
mg/kg
1.6E-07
(mg/kg/day)
1.6E+01
(mg/kg/day)"
2.5E-06
Aluminum
9940
mg/kg
1.4E-02
(mg/kg/day)
NA
(mg/kg/day)"
Antimony
6.48
mg/kg
9.3E-06
(mg/kg/day)
NA
(mg/kg/day)"
Arsenic
3.95
mg/kg
3.4E-06
(mg/kg/day)
1.5E+00
(mg/kg/day)"
5.1E-06
Cobalt
6.32
mg/kg
9.1E-06
(mg/kg/day)
NA
(mg/kg/day)"
Copper
660
mg/kg
9.5E-04
(mg/kg/day)
NA
(mg/kg/day)"
Iron
19200
mg/kg
2.8E-02
(mg/kg/day)
NA
(mg/kg/day)"
Lead
71.4
mg/kg
1.0E-04
(mg/kg/day)
NA
(mg/kg/day)"
Manganese
388
mg/kg
5.6E-04
(mg/kg/day)
NA
(mg/kg/day)"
Thallium
2.13
mg/kg
3.1E-06
(mg/kg/day)
NA
(mg/kg/day)"
Vanadium
23.6
mg/kg
3.4E-05
(mg/kg/day)
NA
(mg/kg/day)"
Zinc
380
mg/kg
5.5E-04
(mg/kg/day)
NA
(mg/kg/day)"
Exp. Route Total
9.3E-06
Dermal
Benzo(a)pyrene
0.252
mg/kg
5.5E-07
(mg/kg/day)
1.0E+00
(mg/kg/day)"
5.5E-07
Naphthalene
9.8
mg/kg
5.2E-06
(mg/kg/day)
NA
(mg/kg/day)"
Dieldrin
0.11
mg/kg
4.5E-08
(mg/kg/day)
1.6E+01
(mg/kg/day)"
7.1E-07
Aluminum
9940
mg/kg
4.0E-04
(mg/kg/day)
NA
(mg/kg/day)"
Antimony
6.48
mg/kg
2.6E-07
(mg/kg/day)
NA
(mg/kg/day)"
Arsenic
3.95
mg/kg
4.8E-07
(mg/kg/day)
1.5E+00
(mg/kg/day)"
7.2E-07
Cobalt
6.32
mg/kg
2.6E-07
(mg/kg/day)
NA
(mg/kg/day)"
Copper
660
mg/kg
2.7E-05
(mg/kg/day)
NA
(mg/kg/day)"
Iron
19200
mg/kg
7.8E-04
(mg/kg/day)
NA
(mg/kg/day)"
Lead
71.4
mg/kg
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)"
Manganese
388
mg/kg
1.6E-05
(mg/kg/day)
NA
(mg/kg/day)"
Thallium
2.13
mg/kg
8.6E-08
(mg/kg/day)
NA
(mg/kg/day)"
Vanadium
23.6
mg/kg
9.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
Zinc
380
mg/kg
1.5E-05
(mg/kg/day)
NA
(mg/kg/day)"
Exp. Route Total
2.0E-06
Exposure Point Total
1.1E-05
Exposure Medium Total
1.1E-05
Air
OWR
Inhalation
Benzo(a)pyrene
7.8E-11
mg/m3
7.7E-11
(mg/m3)
6.0E-04
(ug/m3)"1
4.6E-11
Naphthalene
1.7E-04
mg/m3
5.9E-05
(mg/m3)
3.4E-05
(ug/m3)"1
2.0E-06
Dieldrin
3.4E-11
mg/m3
1.2E-11
(mg/m3)
4.6E-03
(ug/m3)"1
5.6E-11
Aluminum
3.1E-06
mg/m3
1.1E-06
(mg/m3)
NA
(ug/m3)"1
Antimony
2.0E-09
mg/m3
7.1E-10
(mg/m3)
NA
(ug/m3)"1
Arsenic
1.2E-09
mg/m3
4.3E-10
(mg/m3)
4.3E-03
(ug/m3)"1
1.9E-09
Cobalt
2.0E-09
mg/m3
6.9E-10
(mg/m3)
9.0E-03
(ug/m3)"1
6.3E-09
Copper
2.0E-07
mg/m3
7.3E-08
(mg/m3)
NA
(ug/m3)"1
Iron
5.9E-06
mg/m3
2.1E-06
(mg/m3)
NA
(ug/m3)"1
Lead
2.2E-08
mg/m3
7.8E-09
(mg/m3)
NA
(ug/m3)"1
Manganese
1.2E-07
mg/m3
4.3E-08
(mg/m3)
NA
(ug/m3)"1
Thallium
6.6E-10
mg/m3
2.3E-10
(mg/m3)
NA
(ug/m3)"1
Vanadium
7.3E-09
mg/m3
2.6E-09
(mg/m3)
NA
(ug/m3)"1
Zinc
1.2E-07
mg/m3
4.2E-08
(mg/m3)
NA
(ug/m3)"1
Exp. Route Total
2.0E-06
Exposure Point Total
2.0E-06
Exposure Medium Total
2.0E-06
Medium Total
1.3E-05
-------
TABLE 7.9.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 4
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Exposure Medium
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Ingestion
2-Butanone
2-Hexanone
1300
41
ug/L
ug/L
1.7E-02
5.3E-04
(mg/kg/day)
(mg/kg/day)
NA
NA
(mg/kg/day)"
(mg/kg/day)"
Chloroform
9.4
ug/L
1.2E-04
(mg/kg/day)
3.1E-02
(mg/kg/day)"
3.7E-06
cis-1,2-Dichloroethene
1.88
ug/L
2.4E-05
(mg/kg/day)
NA
(mg/kg/day)"
Methyl Tert-Butyl Ether
15
ug/L
1.9E-04
(mg/kg/day)
1.8E-03
(mg/kg/day)"
3.5E-07
Tetrachloroethene
65.7
ug/L
8.4E-04
(mg/kg/day)
2.1E-03
(mg/kg/day)"
1.8E-06
Trichloroethene (Mutagenic)
10.6
ug/L
4.2E-04
(mg/kg/day)
9.3E-03
(mg/kg/day)"
3.9E-06
Trichloroethene (Nonmutagenic
10.6
ug/L
1.4E-04
(mg/kg/day)
3.7E-02
(mg/kg/day)"
5.0E-06
Vinyl Chloride
0.57
ug/L
3.7E-05
(mg/kg/day)
7.2E-01
(mg/kg/day)"
2.7E-05
1,4-Dioxane
3.84
ug/L
4.9E-05
(mg/kg/day)
1.0E-01
(mg/kg/day)"
4.9E-06
Bis(2-ethylhexyl)phthalate
11
ug/L
1.4E-04
(mg/kg/day)
1.4E-02
(mg/kg/day)"
2.0E-06
Caprolactam
2800
ug/L
3.6E-02
(mg/kg/day)
NA
(mg/kg/day)"
Aluminum
57655
ug/L
7.4E-01
(mg/kg/day)
NA
(mg/kg/day)"
Antimony
1.31
ug/L
1.7E-05
(mg/kg/day)
NA
(mg/kg/day)"
Arsenic
12.8
ug/L
1.6E-04
(mg/kg/day)
1.5E+00
(mg/kg/day)"
2.5E-04
Barium
674
ug/L
8.7E-03
(mg/kg/day)
NA
(mg/kg/day)"
Beryllium
3.46
ug/L
4.4E-05
(mg/kg/day)
NA
(mg/kg/day)"
Cadmium
0.424
ug/L
5.4E-06
(mg/kg/day)
NA
(mg/kg/day)"
Cobalt
63.9
ug/L
8.2E-04
(mg/kg/day)
NA
(mg/kg/day)"
Copper
75.2
ug/L
9.7E-04
(mg/kg/day)
NA
(mg/kg/day)"
Iron
45400
ug/L
5.8E-01
(mg/kg/day)
NA
(mg/kg/day)"
Lead
23.1
ug/L
3.0E-04
(mg/kg/day)
NA
(mg/kg/day)"
Manganese
2525
ug/L
3.2E-02
(mg/kg/day)
NA
(mg/kg/day)"
Mercury
0.128
ug/L
1.6E-06
(mg/kg/day)
NA
(mg/kg/day)"
Nickel
51.7
ug/L
6.6E-04
(mg/kg/day)
NA
(mg/kg/day)"
Selenium
3.1
ug/L
4.0E-05
(mg/kg/day)
NA
(mg/kg/day)"
Thallium
0.539
ug/L
6.9E-06
(mg/kg/day)
NA
(mg/kg/day)"
Vanadium
12.3
ug/L
1.6E-04
(mg/kg/day)
NA
(mg/kg/day)"
Zinc
378
ug/L
4.9E-03
(mg/kg/day)
NA
(mg/kg/day)"
Exp. Route Total
2.9E-04
Dermal
2-Butanone
2-Hexanone
1300
41
ug/L
ug/L
1.4E-04
1.8E-05
(mg/kg/day)
(mg/kg/day)
NA
NA
(mg/kg/day)"
(mg/kg/day)"
Chloroform
9.4
ug/L
7.4E-06
(mg/kg/day)
3.1E-02
(mg/kg/day)"
2.3E-07
cis-1,2-Dichloroethene
1.88
ug/L
2.0E-06
(mg/kg/day)
NA
(mg/kg/day)"
Methyl Tert-Butyl Ether
15
ug/L
3.1E-06
(mg/kg/day)
1.8E-03
(mg/kg/day)"
5.6E-09
Tetrachloroethene
65.7
ug/L
3.5E-04
(mg/kg/day)
2.1E-03
(mg/kg/day)"
7.4E-07
Trichloroethene (Mutagenic)
10.6
ug/L
5.3E-05
(mg/kg/day)
9.3E-03
(mg/kg/day)"
4.9E-07
Trichloroethene (Nonmutagenic
10.6
ug/L
1.5E-05
(mg/kg/day)
3.7E-02
(mg/kg/day)"
5.7E-07
Vinyl Chloride
0.57
ug/L
2.3E-06
(mg/kg/day)
7.2E-01
(mg/kg/day)"
1.7E-06
1,4-Dioxane
3.84
ug/L
1.6E-07
(mg/kg/day)
1.0E-01
(mg/kg/day)"
1.6E-08
Bis(2-ethylhexyl)phthalate
11
ug/L
0.0E+00
(mg/kg/day)
1.4E-02
(mg/kg/day)"
Caprolactam
2800
ug/L
4.3E-04
(mg/kg/day)
NA
(mg/kg/day)"
Aluminum
57655
ug/L
3.8E-03
(mg/kg/day)
NA
(mg/kg/day)"
Antimony
1.31
ug/L
8.7E-08
(mg/kg/day)
NA
(mg/kg/day)"
Arsenic
12.8
ug/L
8.5E-07
(mg/kg/day)
1.5E+00
(mg/kg/day)"
1.3E-06
Barium
674
ug/L
4.5E-05
(mg/kg/day)
NA
(mg/kg/day)"
Beryllium
3.46
ug/L
2.3E-07
(mg/kg/day)
NA
(mg/kg/day)"
Cadmium
0.424
ug/L
2.8E-08
(mg/kg/day)
NA
(mg/kg/day)"
Cobalt
63.9
ug/L
1.7E-06
(mg/kg/day)
NA
(mg/kg/day)"
Copper
75.2
ug/L
5.0E-06
(mg/kg/day)
NA
(mg/kg/day)"
Iron
45400
ug/L
3.0E-03
(mg/kg/day)
NA
(mg/kg/day)"
Lead
23.1
ug/L
1.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
Manganese
2525
ug/L
1.7E-04
(mg/kg/day)
NA
(mq/kq/dav)
Groundwater
Groundwater
-------
TABLE 7.9.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 3 OF 4
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Groundwater
Groundwater
OWRGC
Dermal
Mercury
0.128
ug/L
8.5E-09
(mg/kg/day)
NA
(mg/kg/day)"
Nickel
51.7
ug/L
6.9E-07
(mg/kg/day)
NA
(mg/kg/day)"
Selenium
3.1
ug/L
2.1E-07
(mg/kg/day)
NA
(mg/kg/day)"
Thallium
0.539
ug/L
3.6E-08
(mg/kg/day)
NA
(mg/kg/day)"
Vanadium
12.3
ug/L
8.2E-07
(mg/kg/day)
NA
(mg/kg/day)"
Zinc
378
ug/L
1.5E-05
(mg/kg/day)
NA
(mg/kg/day)"
Exp. Route Total
5.0E-06
Exposure Point Total
3.0E-04
Exposure Medium Total
3.0E-04
Air
OWR
Inhalation
2-Butanone
2.2E-01
mg/m3
6.0E-02
(mg/m3)
NA
(ug/m3)"1
2-Hexanone
8.4E-03
mg/m3
2.3E-03
(mg/m3)
NA
(ug/m3)"1
Chloroform
5.2E-03
mg/m3
1.4E-03
(mg/m3)
2.3E-05
(ug/m3)"1
3.3E-05
cis-1,2-Dichloroethene
1.1E-03
mg/m3
3.1E-04
(mg/m3)
NA
(ug/m3)"1
Methyl Tert-Butyl Ether
7.4E-03
mg/m3
2.0E-03
(mg/m3)
2.6E-07
(ug/m3)"1
5.3E-07
Tetrachloroethene
3.3E-02
mg/m3
9.1E-03
(mg/m3)
2.6E-07
(ug/m3)"1
2.4E-06
Trichloroethene (Mutagenic)
5.8E-03
mg/m3
3.2E-03
(mg/m3)
1.0E-06
(ug/m3)"1
3.2E-06
Trichloroethene (Nonmutagenic
5.8E-03
mg/m3
1.6E-03
(mg/m3)
3.1E-06
(ug/m3)"1
4.9E-06
Vinyl Chloride
4.1E-04
mg/m3
1.1E-04
(mg/m3)
4.4E-06
(ug/m3)"1
5.0E-07
1,4-Dioxane
6.3E-05
mg/m3
1.7E-05
(mg/m3)
5.0E-06
(ug/m3)"1
8.6E-08
Bis(2-ethylhexyl)phthalate
0.0E+00
mg/m3
0.0E+00
(mg/m3)
2.4E-06
(ug/m3)"1
Caprolactam
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Aluminum
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Antimony
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Arsenic
0.0E+00
mg/m3
0.0E+00
(mg/m3)
4.3E-03
(ug/m3)"1
Barium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Beryllium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
2.4E-03
(ug/m3)"1
Cadmium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
1.8E-03
(ug/m3)"1
Cobalt
0.0E+00
mg/m3
0.0E+00
(mg/m3)
9.0E-03
(ug/m3)"1
Copper
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Iron
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Lead
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Manganese
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Mercury
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Nickel
0.0E+00
mg/m3
0.0E+00
(mg/m3)
2.6E-04
(ug/m3)"1
Selenium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Thallium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Vanadium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Zinc
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Exp. Route Total
4.4E-05
Exposure Point Total
4.4E-05
Exposure Medium Total
4.4E-05
Medium Total
3.4E-04
-------
TABLE 7.9.RME
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 4 OF 4
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Medium
Exposure Medium
Exposure Point
Exposure Route Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
|
Value
Units
Value
Units
Value
Units
Value
Units
Sediment
Sediment
OWR
Ingestion Cobalt
14
mg/kg
3.0E-06
(mg/kg/day)
NA
(mg/kg/day)"1
[Nickel
1500
mg/kg
3.2E-04
(mg/kg/day)
NA
(mg/kg/day)"1
I Exp. Route Total |
Dermal jCobalt
14
mg/kg
8.4E-08
(mg/kg/day)
NA
(mg/kg/day)"1
| Nickel
1500
mg/kg
9.0E-06
(mg/kg/day)
NA
(mg/kg/day)"1
Exp. Route Total jj
Exposure Point Total
Exposure Medium Total
Medium Total
Total of Receptor Risks Across All Media
3.6E-04
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 7.1 .CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Current
Receptor Population: Industrial Workers
Receptor Age: Adult
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Surface Soil
Surface Soil
OWR
Ingestion
Benzo(a)pyrene
0.286
mg/kg
1.1E-08
(mg/kg/day)
1.0E+00
(mg/kg/day)"
1.1E-08
1.1E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00036
Naphthalene
9.8
mg/kg
3.7E-07
(mg/kg/day)
NA
(mg/kg/day)"
3.7E-06
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.00018
Dieldrin
0.11
mg/kg
4.1E-09
(mg/kg/day)
1.6E+01
(mg/kg/day)"
6.6E-08
4.1E-08
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.00083
Aluminum
12000
mg/kg
4.5E-04
(mg/kg/day)
NA
(mg/kg/day)"
4.5E-03
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.0045
Antimony
11.3
mg/kg
4.2E-07
(mg/kg/day)
NA
(mg/kg/day)"
4.2E-06
(mg/kg/day)
4.0E-04
(mg/kg/day)
0.011
Arsenic
5.28
mg/kg
1.2E-07
(mg/kg/day)
1.5E+00
(mg/kg/day)"
1.8E-07
1.2E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0040
Cobalt
7.59
mg/kg
2.8E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.8E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0095
Copper
1240
mg/kg
4.7E-05
(mg/kg/day)
NA
(mg/kg/day)"
4.7E-04
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.012
Iron
20200
mg/kg
7.6E-04
(mg/kg/day)
NA
(mg/kg/day)"
7.6E-03
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.011
Lead
131
mg/kg
4.9E-06
(mg/kg/day)
NA
(mg/kg/day)"
4.9E-05
(mg/kg/day)
NA
(mg/kg/day)
Manganese
456
mg/kg
1.7E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.7E-04
(mg/kg/day)
2.4E-02
(mg/kg/day)
0.0071
Vanadium
27
mg/kg
1.0E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.0E-05
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.0020
Zinc
705
mg/kg
2.6E-05
(mg/kg/day)
NA
(mg/kg/day)"
2.6E-04
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.00088
Exp. Route Total
2.5E-07
0.062
Dermal
Benzo(a)pyrene
0.286
mg/kg
2.0E-09
(mg/kg/day)
1.0E+00
(mg/kg/day)"
2.0E-09
2.0E-08
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.000066
Naphthalene
9.8
mg/kg
6.7E-08
(mg/kg/day)
NA
(mg/kg/day)"
6.7E-07
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.000034
Dieldrin
0.11
mg/kg
5.8E-10
(mg/kg/day)
1.6E+01
(mg/kg/day)"
9.3E-09
5.8E-09
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.00012
Aluminum
12000
mg/kg
6.3E-06
(mg/kg/day)
NA
(mg/kg/day)"
6.3E-05
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.000063
Antimony
11.3
mg/kg
6.0E-09
(mg/kg/day)
NA
(mg/kg/day)"
6.0E-08
(mg/kg/day)
6.0E-05
(mg/kg/day)
0.00100
Arsenic
5.28
mg/kg
8.4E-09
(mg/kg/day)
1.5E+00
(mg/kg/day)"
1.3E-08
8.4E-08
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00028
Cobalt
7.59
mg/kg
4.0E-09
(mg/kg/day)
NA
(mg/kg/day)"
4.0E-08
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00013
Copper
1240
mg/kg
6.6E-07
(mg/kg/day)
NA
(mg/kg/day)"
6.6E-06
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.00016
Iron
20200
mg/kg
1.1E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.1E-04
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.00015
Lead
131
mg/kg
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)"
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)
Manganese
456
mg/kg
2.4E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.4E-06
(mg/kg/day)
9.6E-04
(mg/kg/day)
0.0025
Vanadium
27
mg/kg
1.4E-08
(mg/kg/day)
NA
(mg/kg/day)"
1.4E-07
(mg/kg/day)
1.3E-04
(mg/kg/day)
0.0011
Zinc
705
mg/kg
3.7E-07
(mg/kg/day)
NA
(mg/kg/day)"
3.7E-06
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.000012
Exp. Route Total
2.4E-08
0.0056
Exposure Point Total
2.8E-07
0.068
Exposure Medium Total
2.8E-07
0.068
Air
OWR
Inhalation
Benzo(a)pyrene
8.8E-11
mg/m3
1.8E-12
(mg/m3)
6.0E-04
(ug/m3)"1
1.1E-12
1.8E-11
(mg/m3)
2.0E-06
(mg/m3)
0.0000088
Naphthalene
1.7E-04
mg/m3
3.3E-06
(mg/m3)
3.4E-05
(ug/m3)"1
1.1E-07
3.3E-05
(mg/m3)
3.0E-03
(mg/m3)
0.011
Dieldrin
3.4E-11
mg/m3
6.8E-13
(mg/m3)
4.6E-03
(ug/m3)"1
3.1E-12
6.8E-12
(mg/m3)
NA
(mg/m3)
Aluminum
3.7E-06
mg/m
7.4E-08
(mg/m3)
NA
(ug/m3)"1
7.4E-07
(mg/m3)
5.0E-03
(mg/m3)
0.00015
Antimony
3.5E-09
mg/m3
7.0E-11
(mg/m3)
NA
(ug/m3)"1
7.0E-10
(mg/m3)
NA
(mg/m3)
Arsenic
1.6E-09
mg/m3
3.3E-11
(mg/m3)
4.3E-03
(ug/m3)"1
1.4E-10
3.3E-10
(mg/m3)
1.5E-05
(mg/m3)
0.000022
Cobalt
2.3E-09
mg/m3
4.7E-11
(mg/m3)
9.0E-03
(ug/m3)"1
4.2E-10
4.7E-10
(mg/m3)
6.0E-06
(mg/m3)
0.000078
Copper
3.8E-07
mg/m3
7.7E-09
(mg/m3)
NA
(ug/m3)"1
7.7E-08
(mg/m3)
NA
(mg/m3)
Iron
6.2E-06
mg/m3
1.2E-07
(mg/m3)
NA
(ug/m3)"1
1.2E-06
(mg/m3)
NA
(mg/m3)
Lead
4.0E-08
mg/m3
8.1E-10
(mg/m3)
NA
(ug/m3)"1
8.1E-09
(mg/m3)
NA
(mg/m3)
Manganese
1.4E-07
mg/m3
2.8E-09
(mg/m3)
NA
(ug/m3)"1
2.8E-08
(mg/m3)
5.0E-05
(mg/m3)
0.00056
Vanadium
8.3E-09
mg/m3
1.7E-10
(mg/m3)
NA
(ug/m3)"1
1.7E-09
(mg/m3)
1.0E-04
(mg/m3)
0.000017
Zinc
2.2E-07
mg/m3
4.4E-09
(mg/m3)
NA
(ug/m3)"1
4.4E-08
(mg/m3)
NA
(mg/m3)
Exp. Route Total
1.1E-07
0.012
Exposure Point Total
1.1E-07
0.012
Exposure Medium Total
1.1E-07
0.012
Medium Total
3.9E-07
0.080
Total of Receptor Risks Across All Media
3.9E-07
Total of Receptor Hazards Across All Media
0.080
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 7.2.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 2
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Child
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Surface Soil
Surface Soil
OWR
Ingestion
Benzo(a)pyrene
0.286
mg/kg
2.3E-07
(mg/kg/day)
1.0E+00
(mg/kg/day)"
2.3E-07
1.2E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0041
Naphthalene
9.8
mg/kg
1.2E-06
(mg/kg/day)
NA
(mg/kg/day)"
4.2E-05
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.0021
Dieldrin
0.11
mg/kg
1.3E-08
(mg/kg/day)
1.6E+01
(mg/kg/day)"
2.1E-07
4.7E-07
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.0094
Aluminum
12000
mg/kg
1.5E-03
(mg/kg/day)
NA
(mg/kg/day)"
5.1E-02
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.051
Antimony
11.3
mg/kg
1.4E-06
(mg/kg/day)
NA
(mg/kg/day)"
4.8E-05
(mg/kg/day)
4.0E-04
(mg/kg/day)
0.12
Arsenic
5.28
mg/kg
3.9E-07
(mg/kg/day)
1.5E+00
(mg/kg/day)"
5.8E-07
1.4E-05
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.045
Cobalt
7.59
mg/kg
9.3E-07
(mg/kg/day)
NA
(mg/kg/day)"
3.2E-05
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.11
Copper
1240
mg/kg
1.5E-04
(mg/kg/day)
NA
(mg/kg/day)"
5.3E-03
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.13
Iron
20200
mg/kg
2.5E-03
(mg/kg/day)
NA
(mg/kg/day)"
8.6E-02
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.12
Lead
131
mg/kg
1.6E-05
(mg/kg/day)
NA
(mg/kg/day)"
5.6E-04
(mg/kg/day)
NA
(mg/kg/day)
Manganese
456
mg/kg
5.6E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.9E-03
(mg/kg/day)
2.4E-02
(mg/kg/day)
0.081
Vanadium
27
mg/kg
3.3E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.2E-04
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.023
Zinc
705
mg/kg
8.6E-05
(mg/kg/day)
NA
(mg/kg/day)"
3.0E-03
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.010
Exp. Route Total
1.0E-06
0.71
Dermal
Benzo(a)pyrene
0.286
mg/kg
2.8E-08
(mg/kg/day)
1.0E+00
(mg/kg/day)"
2.8E-08
1.5E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00050
Naphthalene
9.8
mg/kg
1.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
5.2E-06
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.00026
Dieldrin
0.11
mg/kg
1.3E-09
(mg/kg/day)
1.6E+01
(mg/kg/day)"
2.0E-08
4.5E-08
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.00089
Aluminum
12000
mg/kg
1.4E-05
(mg/kg/day)
NA
(mg/kg/day)"
4.9E-04
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.00049
Antimony
11.3
mg/kg
1.3E-08
(mg/kg/day)
NA
(mg/kg/day)"
4.6E-07
(mg/kg/day)
6.0E-05
(mg/kg/day)
0.0076
Arsenic
5.28
mg/kg
1.8E-08
(mg/kg/day)
1.5E+00
(mg/kg/day)"
2.8E-08
6.4E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0021
Cobalt
7.59
mg/kg
8.8E-09
(mg/kg/day)
NA
(mg/kg/day)"
3.1E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0010
Copper
1240
mg/kg
1.4E-06
(mg/kg/day)
NA
(mg/kg/day)"
5.0E-05
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.0013
Iron
20200
mg/kg
2.3E-05
(mg/kg/day)
NA
(mg/kg/day)"
8.2E-04
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.0012
Lead
131
mg/kg
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)"
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)
Manganese
456
mg/kg
5.3E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.8E-05
(mg/kg/day)
9.6E-04
(mg/kg/day)
0.019
Vanadium
27
mg/kg
3.1E-08
(mg/kg/day)
NA
(mg/kg/day)"
1.1E-06
(mg/kg/day)
1.3E-04
(mg/kg/day)
0.0084
Zinc
705
mg/kg
8.2E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.9E-05
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.000095
Exp. Route Total
7.6E-08
0.043
Exposure Point Total
1.1E-06
0.75
Exposure Medium Total
1.1E-06
0.75
Air
OWR
Inhalation
Benzo(a)pyrene
8.8E-11
mg/m3
1.1E-11
(mg/m3)
6.0E-04
(ug/m3)"1
6.3E-12
5.7E-11
(mg/m3)
2.0E-06
(mg/m3)
0.000028
Naphthalene
1.7E-04
mg/m3
3.0E-06
(mg/m3)
3.4E-05
(ug/m3)"1
1.0E-07
1.1E-04
(mg/m3)
3.0E-03
(mg/m3)
0.035
Dieldrin
3.4E-11
mg/m3
6.2E-13
(mg/m3)
4.6E-03
(ug/m3)"1
2.9E-12
2.2E-11
(mg/m3)
NA
(mg/m3)
Aluminum
3.7E-06
mg/m
6.8E-08
(mg/m3)
NA
(ug/m3)"1
2.4E-06
(mg/m3)
5.0E-03
(mg/m3)
0.00047
Antimony
3.5E-09
mg/m3
6.4E-11
(mg/m3)
NA
(ug/m3)"1
2.2E-09
(mg/m3)
NA
(mg/m3)
Arsenic
1.6E-09
mg/m3
3.0E-11
(mg/m3)
4.3E-03
(ug/m3)"1
1.3E-10
1.0E-09
(mg/m3)
1.5E-05
(mg/m3)
0.000070
Cobalt
2.3E-09
mg/m3
4.3E-11
(mg/m3)
9.0E-03
(ug/m3)"1
3.9E-10
1.5E-09
(mg/m3)
6.0E-06
(mg/m3)
0.00025
Copper
3.8E-07
mg/m3
7.0E-09
(mg/m3)
NA
(ug/m3)"1
2.5E-07
(mg/m3)
NA
(mg/m3)
Iron
6.2E-06
mg/m3
1.1E-07
(mg/m3)
NA
(ug/m3)"1
4.0E-06
(mg/m3)
NA
(mg/m3)
Lead
4.0E-08
mg/m3
7.4E-10
(mg/m3)
NA
(ug/m3)"1
2.6E-08
(mg/m3)
NA
(mg/m3)
Manganese
1.4E-07
mg/m3
2.6E-09
(mg/m3)
NA
(ug/m3)"1
9.0E-08
(mg/m3)
5.0E-05
(mg/m3)
0.0018
Vanadium
8.3E-09
mg/m3
1.5E-10
(mg/m3)
NA
(ug/m3)"1
5.3E-09
(mg/m3)
1.0E-04
(mg/m3)
0.000053
Zinc
2.2E-07
mg/m3
4.0E-09
(mg/m3)
NA
(ug/m3)"1
1.4E-07
(mg/m3)
NA
(mg/m3)
Exp. Route Total
1.0E-07
0.038
Exposure Point Total
1.0E-07
0.038
Exposure Medium Total
1.0E-07
0.038
Medium Total
1.2E-06
0.79
-------
TABLE 7.2.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 2
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Child
Medium
Exposure Medium
Exposure Point
Exposure Route Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
|
Value
Units
Value
Units
Value
Units
Value
Units
Sediment
Sediment
OWR
Ingestion Cobalt
14
mg/kg
1.9E-07
(mg/kg/day)
NA
(mg/kg/day)"1
6.6E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.022
[Nickel
1500
mg/kg
2.0E-05
(mg/kg/day)
NA
(mg/kg/day)"1
7.1E-04
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.036
I Exp. Route Total |
0.058
Dermal jCobalt
14
mg/kg
1.8E-09
(mg/kg/day)
NA
(mg/kg/day)"1
6.3E-08
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.000
| Nickel
1500
mg/kg
1.9E-07
(mg/kg/day)
NA
(mg/kg/day)"1
6.8E-06
(mg/kg/day)
8.0E-04
(mg/kg/day)
0.0085
Exp. Route Total jj
0.009
Exposure Point Total
0.07
Exposure Medium Total
0.07
Medium Total
0.07
Total of Receptor Risks Across All Media
1.2E-06
Total of Receptor Hazards Across All Media
0.86
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 7.3.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 2
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Adult
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Surface Soil
Surface Soil
OWR
Ingestion
Benzo(a)pyrene
0.286
mg/kg
1.8E-08
(mg/kg/day)
1.0E+00
(mg/kg/day)"
1.8E-08
1.1E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00038
Naphthalene
9.8
mg/kg
3.9E-07
(mg/kg/day)
NA
(mg/kg/day)"
3.9E-06
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.00020
Dieldrin
0.11
mg/kg
4.4E-09
(mg/kg/day)
1.6E+01
(mg/kg/day)"
7.1E-08
4.4E-08
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.00088
Aluminum
12000
mg/kg
4.8E-04
(mg/kg/day)
NA
(mg/kg/day)"
4.8E-03
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.0048
Antimony
11.3
mg/kg
4.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
4.5E-06
(mg/kg/day)
4.0E-04
(mg/kg/day)
0.011
Arsenic
5.28
mg/kg
1.3E-07
(mg/kg/day)
1.5E+00
(mg/kg/day)"
1.9E-07
1.3E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0042
Cobalt
7.59
mg/kg
3.0E-07
(mg/kg/day)
NA
(mg/kg/day)"
3.0E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.010
Copper
1240
mg/kg
5.0E-05
(mg/kg/day)
NA
(mg/kg/day)"
5.0E-04
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.012
Iron
20200
mg/kg
8.1E-04
(mg/kg/day)
NA
(mg/kg/day)"
8.1E-03
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.012
Lead
131
mg/kg
5.2E-06
(mg/kg/day)
NA
(mg/kg/day)"
5.2E-05
(mg/kg/day)
NA
(mg/kg/day)
Manganese
456
mg/kg
1.8E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.8E-04
(mg/kg/day)
2.4E-02
(mg/kg/day)
0.0076
Vanadium
27
mg/kg
1.1E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.1E-05
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.0022
Zinc
705
mg/kg
2.8E-05
(mg/kg/day)
NA
(mg/kg/day)"
2.8E-04
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.00094
Exp. Route Total
2.8E-07
0.067
Dermal
Benzo(a)pyrene
0.286
mg/kg
2.8E-09
(mg/kg/day)
1.0E+00
(mg/kg/day)"
2.8E-09
1.8E-08
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.000060
Naphthalene
9.8
mg/kg
6.2E-08
(mg/kg/day)
NA
(mg/kg/day)"
6.2E-07
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.000031
Dieldrin
0.11
mg/kg
5.3E-10
(mg/kg/day)
1.6E+01
(mg/kg/day)"
8.5E-09
5.3E-09
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.00011
Aluminum
12000
mg/kg
5.8E-06
(mg/kg/day)
NA
(mg/kg/day)"
5.8E-05
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.000058
Antimony
11.3
mg/kg
5.5E-09
(mg/kg/day)
NA
(mg/kg/day)"
5.5E-08
(mg/kg/day)
6.0E-05
(mg/kg/day)
0.00091
Arsenic
5.28
mg/kg
7.7E-09
(mg/kg/day)
1.5E+00
(mg/kg/day)"
1.1E-08
7.7E-08
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00026
Cobalt
7.59
mg/kg
3.7E-09
(mg/kg/day)
NA
(mg/kg/day)"
3.7E-08
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00012
Copper
1240
mg/kg
6.0E-07
(mg/kg/day)
NA
(mg/kg/day)"
6.0E-06
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.00015
Iron
20200
mg/kg
9.8E-06
(mg/kg/day)
NA
(mg/kg/day)"
9.8E-05
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.00014
Lead
131
mg/kg
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)"
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)
Manganese
456
mg/kg
2.2E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.2E-06
(mg/kg/day)
9.6E-04
(mg/kg/day)
0.0023
Vanadium
27
mg/kg
1.3E-08
(mg/kg/day)
NA
(mg/kg/day)"
1.3E-07
(mg/kg/day)
1.3E-04
(mg/kg/day)
0.0010
Zinc
705
mg/kg
3.4E-07
(mg/kg/day)
NA
(mg/kg/day)"
3.4E-06
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.000011
Exp. Route Total
2.3E-08
0.0051
Exposure Point Total
3.0E-07
0.072
Exposure Medium Total
3.0E-07
0.072
Air
OWR
Inhalation
Benzo(a)pyrene
8.8E-11
mg/m3
8.9E-12
(mg/m3)
6.0E-04
(ug/m3)"1
5.3E-12
5.7E-11
(mg/m3)
2.0E-06
(mg/m3)
0.000028
Naphthalene
1.7E-04
mg/m3
1.1E-05
(mg/m3)
3.4E-05
(ug/m3)"1
3.6E-07
1.1E-04
(mg/m3)
3.0E-03
(mg/m3)
0.035
Dieldrin
3.4E-11
mg/m3
2.2E-12
(mg/m3)
4.6E-03
(ug/m3)"1
1.0E-11
2.2E-11
(mg/m3)
NA
(mg/m3)
Aluminum
3.7E-06
mg/m
2.4E-07
(mg/m3)
NA
(ug/m3)"1
2.4E-06
(mg/m3)
5.0E-03
(mg/m3)
0.00047
Antimony
3.5E-09
mg/m3
2.2E-10
(mg/m3)
NA
(ug/m3)"1
2.2E-09
(mg/m3)
NA
(mg/m3)
Arsenic
1.6E-09
mg/m3
1.0E-10
(mg/m3)
4.3E-03
(ug/m3)"1
4.5E-10
1.0E-09
(mg/m3)
1.5E-05
(mg/m3)
0.000070
Cobalt
2.3E-09
mg/m3
1.5E-10
(mg/m3)
9.0E-03
(ug/m3)"1
1.4E-09
1.5E-09
(mg/m3)
6.0E-06
(mg/m3)
0.00025
Copper
3.8E-07
mg/m3
2.5E-08
(mg/m3)
NA
(ug/m3)"1
2.5E-07
(mg/m3)
NA
(mg/m3)
Iron
6.2E-06
mg/m3
4.0E-07
(mg/m3)
NA
(ug/m3)"1
4.0E-06
(mg/m3)
NA
(mg/m3)
Lead
4.0E-08
mg/m3
2.6E-09
(mg/m3)
NA
(ug/m3)"1
2.6E-08
(mg/m3)
NA
(mg/m3)
Manganese
1.4E-07
mg/m3
9.0E-09
(mg/m3)
NA
(ug/m3)"1
9.0E-08
(mg/m3)
5.0E-05
(mg/m3)
0.0018
Vanadium
8.3E-09
mg/m3
5.3E-10
(mg/m3)
NA
(ug/m3)"1
5.3E-09
(mg/m3)
1.0E-04
(mg/m3)
0.000053
Zinc
2.2E-07
mg/m3
1.4E-08
(mg/m3)
NA
(ug/m3)"1
1.4E-07
(mg/m3)
NA
(mg/m3)
Exp. Route Total
3.6E-07
0.038
Exposure Point Total
3.6E-07
0.038
Exposure Medium Total
3.6E-07
0.038
Medium Total
6.6E-07
0.11
-------
TABLE 7.3.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 2
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Adult
Medium
Exposure Medium
Exposure Point
Exposure Route Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
|
Value
Units
Value
Units
Value
Units
Value
Units
Sediment
Sediment
OWR
Ingestion Cobalt
14
mg/kg
6.2E-08
(mg/kg/day)
NA
(mg/kg/day)"1
6.2E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0021
[Nickel
1500
mg/kg
6.7E-06
(mg/kg/day)
NA
(mg/kg/day)"1
6.7E-05
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.0033
I Exp. Route Total |
0.0054
Dermal jCobalt
14
mg/kg
7.5E-10
(mg/kg/day)
NA
(mg/kg/day)"1
7.5E-09
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0000
| Nickel
1500
mg/kg
8.1E-08
(mg/kg/day)
NA
(mg/kg/day)"1
8.1E-07
(mg/kg/day)
8.0E-04
(mg/kg/day)
0.0010
Exp. Route Total jj
0.0010
Exposure Point Total
0.006
Exposure Medium Total
0.006
Medium Total
0.006
Total of Receptor Risks Across All Media
6.6E-07
Total of Receptor Hazards Across All Media
0.12
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 7.4.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 2
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Surface Soil
Surface Soil
OWR
Ingestion
Benzo(a)pyrene
0.286
mg/kg
2.5E-07
(mg/kg/day)
1.0E+00
(mg/kg/day)"
2.5E-07
See Tables 7.2.CTE and 7.3.CTE for Hazard Indices
Naphthalene
9.8
mg/kg
1.6E-06
(mg/kg/day)
NA
(mg/kg/day)"
Dieldrin
0.11
mg/kg
1.8E-08
(mg/kg/day)
1.6E+01
(mg/kg/day)"
2.9E-07
Aluminum
12000
mg/kg
1.9E-03
(mg/kg/day)
NA
(mg/kg/day)"
Antimony
11.3
mg/kg
1.8E-06
(mg/kg/day)
NA
(mg/kg/day)"
Arsenic
5.28
mg/kg
5.1E-07
(mg/kg/day)
1.5E+00
(mg/kg/day)"
7.7E-07
Cobalt
7.59
mg/kg
1.2E-06
(mg/kg/day)
NA
(mg/kg/day)"
Copper
1240
mg/kg
2.0E-04
(mg/kg/day)
NA
(mg/kg/day)"
Iron
20200
mg/kg
3.3E-03
(mg/kg/day)
NA
(mg/kg/day)"
Lead
131
mg/kg
2.1E-05
(mg/kg/day)
NA
(mg/kg/day)"
Manganese
456
mg/kg
7.4E-05
(mg/kg/day)
NA
(mg/kg/day)"
Vanadium
27
mg/kg
4.4E-06
(mg/kg/day)
NA
(mg/kg/day)"
Zinc
705
mg/kg
1.1E-04
(mg/kg/day)
NA
(mg/kg/day)"
Exp. Route Total
1.3E-06
Dermal
Benzo(a)pyrene
0.286
mg/kg
3.1E-08
(mg/kg/day)
1.0E+00
(mg/kg/day)"
3.1E-08
Naphthalene
9.8
mg/kg
2.1E-07
(mg/kg/day)
NA
(mg/kg/day)"
Dieldrin
0.11
mg/kg
1.8E-09
(mg/kg/day)
1.6E+01
(mg/kg/day)"
2.9E-08
Aluminum
12000
mg/kg
2.0E-05
(mg/kg/day)
NA
(mg/kg/day)"
Antimony
11.3
mg/kg
1.9E-08
(mg/kg/day)
NA
(mg/kg/day)"
Arsenic
5.28
mg/kg
2.6E-08
(mg/kg/day)
1.5E+00
(mg/kg/day)"
3.9E-08
Cobalt
7.59
mg/kg
1.2E-08
(mg/kg/day)
NA
(mg/kg/day)"
Copper
1240
mg/kg
2.0E-06
(mg/kg/day)
NA
(mg/kg/day)"
Iron
20200
mg/kg
3.3E-05
(mg/kg/day)
NA
(mg/kg/day)"
Lead
131
mg/kg
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)"
Manganese
456
mg/kg
7.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
Vanadium
27
mg/kg
4.4E-08
(mg/kg/day)
NA
(mg/kg/day)"
Zinc
705
mg/kg
1.2E-06
(mg/kg/day)
NA
(mg/kg/day)"
Exp. Route Total
9.9E-08
Exposure Point Total
1.4E-06
Exposure Medium Total
1.4E-06
Air
OWR
Inhalation
Benzo(a)pyrene
8.8E-11
mg/m3
1.9E-11
(mg/m3)
6.0E-04
(ug/m3)"1
1.2E-11
Naphthalene
1.7E-04
mg/m3
1.4E-05
(mg/m3)
3.4E-05
(ug/m3)"1
4.6E-07
Dieldrin
3.4E-11
mg/m3
2.8E-12
(mg/m3)
4.6E-03
(ug/m3)"1
1.3E-11
Aluminum
3.7E-06
mg/m3
3.1E-07
(mg/m3)
NA
(ug/m3)"1
Antimony
3.5E-09
mg/m3
2.9E-10
(mg/m3)
NA
(ug/m3)"1
Arsenic
1.6E-09
mg/m3
1.3E-10
(mg/m3)
4.3E-03
(ug/m3)"1
5.8E-10
Cobalt
2.3E-09
mg/m3
1.9E-10
(mg/m3)
9.0E-03
(ug/m3)"1
1.7E-09
Copper
3.8E-07
mg/m3
3.2E-08
(mg/m3)
NA
(ug/m3)"1
Iron
6.2E-06
mg/m3
5.1E-07
(mg/m3)
NA
(ug/m3)"1
Lead
4.0E-08
mg/m3
3.3E-09
(mg/m3)
NA
(ug/m3)"1
Manganese
1.4E-07
mg/m3
1.2E-08
(mg/m3)
NA
(ug/m3)"1
Vanadium
8.3E-09
mg/m3
6.9E-10
(mg/m3)
NA
(ug/m3)"1
Zinc
2.2E-07
mg/m3
1.8E-08
(mg/m3)
NA
(ug/m3)"1
Exp. Route Total
4.6E-07
Exposure Point Total
4.6E-07
Exposure Medium Total
4.6E-07
Medium Total
1.9E-06
-------
TABLE 7.4.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 2
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Medium
Exposure Medium
Exposure Point
Exposure Route Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
|
Value
Units
Value
Units
Value
Units
Value
Units
Sediment
Sediment
OWR
Ingestion Cobalt
14
mg/kg
2.5E-07
(mg/kg/day)
NA
(mg/kg/day)"1
[Nickel
1500
mg/kg
2.7E-05
(mg/kg/day)
NA
(mg/kg/day)"1
I Exp. Route Total |
Dermal jCobalt
14
mg/kg
2.6E-09
(mg/kg/day)
NA
(mg/kg/day)"1
| Nickel
1500
mg/kg
2.7E-07
(mg/kg/day)
NA
(mg/kg/day)"1
Exp. Route Total jj
Exposure Point Total
Exposure Medium Total
Medium Total
Total of Receptor Risks Across All Media
1.9E-06
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 7.5.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 3
Scenario Timeframe: Future
Receptor Population: Construction Workers
Receptor Age: Adult
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Ingestion
Benzo(a)pyrene
0.252
mg/kg
2.5E-09
(mg/kg/day)
1.0E+00
(mg/kg/day)"
2.5E-09
1.8E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00059
Naphthalene
9.8
mg/kg
9.9E-08
(mg/kg/day)
NA
(mg/kg/day)"
6.9E-06
(mg/kg/day)
6.0E-01
(mg/kg/day)
0.000012
Dieldrin
0.11
mg/kg
1.1E-09
(mg/kg/day)
1.6E+01
(mg/kg/day)"
1.8E-08
7.8E-08
(mg/kg/day)
1.0E-04
(mg/kg/day)
0.00078
Aluminum
9940
mg/kg
1.0E-04
(mg/kg/day)
NA
(mg/kg/day)"
7.0E-03
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.0070
Antimony
6.48
mg/kg
6.5E-08
(mg/kg/day)
NA
(mg/kg/day)"
4.6E-06
(mg/kg/day)
4.0E-04
(mg/kg/day)
0.011
Arsenic
3.95
mg/kg
2.4E-08
(mg/kg/day)
1.5E+00
(mg/kg/day)"
3.6E-08
1.7E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0056
Cobalt
6.32
mg/kg
6.4E-08
(mg/kg/day)
NA
(mg/kg/day)"
4.5E-06
(mg/kg/day)
3.0E-03
(mg/kg/day)
0.0015
Copper
660
mg/kg
6.7E-06
(mg/kg/day)
NA
(mg/kg/day)"
4.7E-04
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.012
Iron
19200
mg/kg
1.9E-04
(mg/kg/day)
NA
(mg/kg/day)"
1.4E-02
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.019
Lead
71.4
mg/kg
7.2E-07
(mg/kg/day)
NA
(mg/kg/day)"
5.0E-05
(mg/kg/day)
NA
(mg/kg/day)
Manganese
388
mg/kg
3.9E-06
(mg/kg/day)
NA
(mg/kg/day)"
2.7E-04
(mg/kg/day)
2.4E-02
(mg/kg/day)
0.011
Thallium
2.13
mg/kg
2.1E-08
(mg/kg/day)
NA
(mg/kg/day)"
1.5E-06
(mg/kg/day)
4.0E-05
(mg/kg/day)
0.038
Vanadium
23.6
mg/kg
2.4E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.7E-05
(mg/kg/day)
1.0E-02
(mg/kg/day)
0.0017
Zinc
380
mg/kg
3.8E-06
(mg/kg/day)
NA
(mg/kg/day)"
2.7E-04
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.00089
Exp. Route Total
5.6E-08
0.11
Dermal
Benzo(a)pyrene
0.252
mg/kg
7.1E-10
(mg/kg/day)
1.0E+00
(mg/kg/day)"
7.1E-10
4.9E-08
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00016
Naphthalene
9.8
mg/kg
2.7E-08
(mg/kg/day)
NA
(mg/kg/day)"
1.9E-06
(mg/kg/day)
6.0E-01
(mg/kg/day)
0.0000032
Dieldrin
0.11
mg/kg
2.4E-10
(mg/kg/day)
1.6E+01
(mg/kg/day)"
3.8E-09
1.7E-08
(mg/kg/day)
1.0E-04
(mg/kg/day)
0.00017
Aluminum
9940
mg/kg
2.1E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.5E-04
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.00015
Antimony
6.48
mg/kg
1.4E-09
(mg/kg/day)
NA
(mg/kg/day)"
9.8E-08
(mg/kg/day)
6.0E-05
(mg/kg/day)
0.0016
Arsenic
3.95
mg/kg
2.6E-09
(mg/kg/day)
1.5E+00
(mg/kg/day)"
3.8E-09
1.8E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00060
Cobalt
6.32
mg/kg
1.4E-09
(mg/kg/day)
NA
(mg/kg/day)"
9.5E-08
(mg/kg/day)
3.0E-03
(mg/kg/day)
0.000032
Copper
660
mg/kg
1.4E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.0E-05
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.00025
Iron
19200
mg/kg
4.1E-06
(mg/kg/day)
NA
(mg/kg/day)"
2.9E-04
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.00041
Lead
71.4
mg/kg
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)"
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)
Manganese
388
mg/kg
8.4E-08
(mg/kg/day)
NA
(mg/kg/day)"
5.9E-06
(mg/kg/day)
9.6E-04
(mg/kg/day)
0.0061
Thallium
2.13
mg/kg
4.6E-10
(mg/kg/day)
NA
(mg/kg/day)"
3.2E-08
(mg/kg/day)
4.0E-05
(mg/kg/day)
0.00080
Vanadium
23.6
mg/kg
5.1E-09
(mg/kg/day)
NA
(mg/kg/day)"
3.6E-07
(mg/kg/day)
2.6E-04
(mg/kg/day)
0.0014
Zinc
380
mg/kg
8.2E-08
(mg/kg/day)
NA
(mg/kg/day)"
5.7E-06
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.000019
Exp. Route Total
8.3E-09
0.012
Exposure Point Total
6.5E-08
0.12
Exposure Medium Total
6.5E-08
0.12
Air
OWR
Inhalation
Benzo(a)pyrene
1.8E-07
mg/m3
2.9E-10
(mg/m3)
6.0E-04
(ug/m3)"1
1.8E-10
2.1E-08
(mg/m3)
2.0E-06
(mg/m3)
0.010
Naphthalene
9.6E-04
mg/m3
1.6E-06
(mg/m3)
3.4E-05
(ug/m3)"1
5.3E-08
1.1E-04
(mg/m3)
3.0E-03
(mg/m3)
0.036
Dieldrin
7.9E-08
mg/m3
1.3E-10
(mg/m3)
4.6E-03
(ug/m3)"1
5.9E-10
9.0E-09
(mg/m3)
NA
(mg/m3)
Aluminum
7.1E-03
mg/m3
1.2E-05
(mg/m3)
NA
(ug/m3)"1
8.1E-04
(mg/m3)
5.0E-03
(mg/m3)
0.16
Antimony
4.6E-06
mg/m3
7.5E-09
(mg/m3)
NA
(ug/m3)"1
5.3E-07
(mg/m3)
NA
(mg/m3)
Arsenic
2.8E-06
mg/m3
4.6E-09
(mg/m3)
4.3E-03
(ug/m3)"1
2.0E-08
3.2E-07
(mg/m3)
1.5E-05
(mg/m3)
0.021
Cobalt
4.5E-06
mg/m3
7.4E-09
(mg/m3)
9.0E-03
(ug/m3)"1
6.6E-08
5.2E-07
(mg/m3)
2.0E-05
(mg/m3)
0.026
Copper
4.7E-04
mg/m3
7.7E-07
(mg/m3)
NA
(ug/m3)"1
5.4E-05
(mg/m3)
NA
(mg/m3)
Iron
1.4E-02
mg/m3
2.2E-05
(mg/m3)
NA
(ug/m3)"1
1.6E-03
(mg/m3)
NA
(mg/m3)
Lead
5.1E-05
mg/m3
8.3E-08
(mg/m3)
NA
(ug/m3)"1
5.8E-06
(mg/m3)
NA
(mg/m3)
Manganese
2.8E-04
mg/m3
4.5E-07
(mg/m3)
NA
(ug/m3)"1
3.2E-05
(mg/m3)
5.0E-05
(mg/m3)
0.63
Thallium
1.5E-06
mg/m3
2.5E-09
(mg/m3)
NA
(ug/m3)"1
1.7E-07
(mg/m3)
NA
(mg/m3)
Vanadium
1.7E-05
mg/m
2.7E-08
(mg/m3)
NA
(ug/m3)"1
1.9E-06
(mg/m3)
1.0E-04
(mg/m3)
0.019
Zinc
2.7E-04
mg/m3
4.4E-07
(mg/m3)
NA
(ug/m3)"1
3.1E-05
(mg/m3)
NA
(mg/m3)
Exp. Route Total
1.4E-07
0.91
Exposure Point Total
1.4E-07
0.91
Exposure Medium Total
1.4E-07
0.91
Medium Total
2.0E-07
1.0
-------
TABLE 7.5.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 3
Scenario Timeframe: Future
Receptor Population: Construction Workers
Receptor Age: Adult
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Groundwater
Groundwater
OWR
Ingestion
2-Butanone
2
ug/L
1.5E-09
(mg/kg/day)
NA
(mg/kg/day)"
1.0E-07
(mg/kg/day)
2.0E+00
(mg/kg/day)
5.1 E-8
cis-1,2-Dichloroethene
3.1
ug/L
2.3E-09
(mg/kg/day)
NA
(mg/kg/day)"
1.6E-07
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.0000080
Methyl tert-butyl ether
0.95
ug/L
7.0E-10
(mg/kg/day)
1.8E-03
(mg/kg/day)"
1.3E-12
4.9E-08
(mg/kg/day)
NA
(mg/kg/day)
Trichloroethene
27
ug/L
2.0E-08
(mg/kg/day)
4.6E-02
(mg/kg/day)"
9.1E-10
1.4E-06
(mg/kg/day)
5.0E-04
(mg/kg/day)
0.0028
1,4-Dioxane
3.8
ug/L
2.8E-09
(mg/kg/day)
1.0E-01
(mg/kg/day)"
2.8E-10
2.0E-07
(mg/kg/day)
5.0E-01
(mg/kg/day)
0.00000039
Caprolactam
3.7
ug/L
2.7E-09
(mg/kg/day)
NA
(mg/kg/day)"
1.9E-07
(mg/kg/day)
5.0E-01
(mg/kg/day)
0.00000038
Aluminum
114000
ug/L
8.4E-05
(mg/kg/day)
NA
(mg/kg/day)"
5.9E-03
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.0059
Antimony
0.46
ug/L
3.4E-10
(mg/kg/day)
NA
(mg/kg/day)"
2.4E-08
(mg/kg/day)
4.0E-04
(mg/kg/day)
0.000059
Arsenic
60.1
ug/L
4.4E-08
(mg/kg/day)
1.5E+00
(mg/kg/day)"
6.6E-08
3.1E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.010
Barium
3310
ug/L
2.4E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.7E-04
(mg/kg/day)
2.0E-01
(mg/kg/day)
0.00085
Beryllium
17.8
ug/L
1.3E-08
(mg/kg/day)
NA
(mg/kg/day)"
9.1E-07
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.00018
Cadmium
0.45
ug/L
3.3E-10
(mg/kg/day)
NA
(mg/kg/day)"
2.3E-08
(mg/kg/day)
5.0E-04
(mg/kg/day)
0.000046
Cobalt
12.2
ug/L
9.0E-09
(mg/kg/day)
NA
(mg/kg/day)"
6.3E-07
(mg/kg/day)
3.0E-03
(mg/kg/day)
0.00021
Copper
39.9
ug/L
2.9E-08
(mg/kg/day)
NA
(mg/kg/day)"
2.0E-06
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.000051
Iron
74900
ug/L
5.5E-05
(mg/kg/day)
NA
(mg/kg/day)"
3.8E-03
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.0055
Lead
206
ug/L
1.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.1E-05
(mg/kg/day)
NA
(mg/kg/day)
Manganese
1020
ug/L
7.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
5.2E-05
(mg/kg/day)
2.4E-02
(mg/kg/day)
0.0022
Mercury
0.091
ug/L
6.7E-11
(mg/kg/day)
NA
(mg/kg/day)"
4.7E-09
(mg/kg/day)
2.0E-03
(mg/kg/day)
0.0000023
Nickel
15.8
ug/L
1.2E-08
(mg/kg/day)
NA
(mg/kg/day)"
8.1E-07
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.000041
Selenium
1.6
ug/L
1.2E-09
(mg/kg/day)
NA
(mg/kg/day)"
8.2E-08
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.000016
Thallium
2.3
ug/L
1.7E-09
(mg/kg/day)
NA
(mg/kg/day)"
1.2E-07
(mg/kg/day)
4.0E-05
(mg/kg/day)
0.0030
Vanadium
30.5
ug/L
2.2E-08
(mg/kg/day)
NA
(mg/kg/day)"
1.6E-06
(mg/kg/day)
1.0E-02
(mg/kg/day)
0.00016
Zinc
343
ug/L
2.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.8E-05
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.000059
Exp. Route Total
6.7E-08
0.031
Dermal
2-Butanone
2
ug/L
4.5E-10
(mg/kg/day)
NA
(mg/kg/day)"
3.2E-08
(mg/kg/day)
2.0E+00
(mg/kg/day)
1.6E-8
cis-1,2-Dichloroethene
3.1
ug/L
8.1E-09
(mg/kg/day)
NA
(mg/kg/day)"
5.7E-07
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.000028
Methyl tert-butyl ether
0.95
ug/L
4.8E-10
(mg/kg/day)
1.8E-03
(mg/kg/day)"
8.6E-13
3.4E-08
(mg/kg/day)
NA
(mg/kg/day)
Trichloroethene
27
ug/L
8.1E-08
(mg/kg/day)
4.6E-02
(mg/kg/day)"
3.7E-09
5.7E-06
(mg/kg/day)
5.0E-04
(mg/kg/day)
0.011
1,4-Dioxane
3.8
ug/L
3.0E-10
(mg/kg/day)
1.0E-01
(mg/kg/day)"
3.0E-11
2.1E-08
(mg/kg/day)
5.0E-01
(mg/kg/day)
4.3E-8
Caprolactam
3.7
ug/L
9.4E-10
(mg/kg/day)
NA
(mg/kg/day)"
6.6E-08
(mg/kg/day)
5.0E-01
(mg/kg/day)
0.00000013
Aluminum
114000
ug/L
2.4E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.7E-03
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.0017
Antimony
0.46
ug/L
9.5E-11
(mg/kg/day)
NA
(mg/kg/day)"
6.7E-09
(mg/kg/day)
6.0E-05
(mg/kg/day)
0.00011
Arsenic
60.1
ug/L
1.2E-08
(mg/kg/day)
1.5E+00
(mg/kg/day)"
1.9E-08
8.7E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0029
Barium
3310
ug/L
6.9E-07
(mg/kg/day)
NA
(mg/kg/day)"
4.8E-05
(mg/kg/day)
1.4E-02
(mg/kg/day)
0.0034
Beryllium
17.8
ug/L
3.7E-09
(mg/kg/day)
NA
(mg/kg/day)"
2.6E-07
(mg/kg/day)
3.5E-05
(mg/kg/day)
0.0074
Cadmium
0.45
ug/L
9.3E-11
(mg/kg/day)
NA
(mg/kg/day)"
6.5E-09
(mg/kg/day)
2.5E-05
(mg/kg/day)
0.00026
Cobalt
12.2
ug/L
1.0E-09
(mg/kg/day)
NA
(mg/kg/day)"
7.1E-08
(mg/kg/day)
3.0E-03
(mg/kg/day)
0.000024
Copper
39.9
ug/L
8.3E-09
(mg/kg/day)
NA
(mg/kg/day)"
5.8E-07
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.000014
Iron
74900
ug/L
1.6E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.1E-03
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.0016
Lead
206
ug/L
4.3E-09
(mg/kg/day)
NA
(mg/kg/day)"
3.0E-07
(mg/kg/day)
NA
(mg/kg/day)
Manganese
1020
ug/L
2.1E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.5E-05
(mg/kg/day)
9.6E-04
(mg/kg/day)
0.015
Mercury
0.091
ug/L
1.9E-11
(mg/kg/day)
NA
(mg/kg/day)"
1.3E-09
(mg/kg/day)
1.4E-04
(mg/kg/day)
0.0000094
Nickel
15.8
ug/L
6.5E-10
(mg/kg/day)
NA
(mg/kg/day)"
4.6E-08
(mg/kg/day)
8.0E-04
(mg/kg/day)
0.000057
Selenium
1.6
ug/L
3.3E-10
(mg/kg/day)
NA
(mg/kg/day)"
2.3E-08
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.0000046
Thallium
2.3
ug/L
4.8E-10
(mg/kg/day)
NA
(mg/kg/day)"
3.3E-08
(mg/kg/day)
4.0E-05
(mg/kg/day)
0.00083
Vanadium
30.5
ug/L
6.3E-09
(mg/kg/day)
NA
(mg/kg/day)"
4.4E-07
(mg/kg/day)
2.6E-04
(mg/kg/day)
0.0017
Zinc
343
ug/L
4.3E-08
(mg/kg/day)
NA
(mg/kg/day)"
3.0E-06
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.0000099
Exp. Route Total
2.2E-08
0.047
Exposure Point Total
9.0E-08
0.08
Exposure Medium Total
9.0E-08
0.08
-------
TABLE 7.5.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 3 OF 3
Scenario Timeframe: Future
Receptor Population: Construction Workers
Receptor Age: Adult
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
Potential Concern
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Groundwater
Air
OWR
Inhalation
2-Butanone
9.4E-03
mg/m3
1.8E-06
(mg/m3)
NA
(ug/m3)"1
1.3E-04
(mg/m3)
1.0E+00
(mg/m3)
0.00013
cis-1,2-Dichloroethene
2.6E-02
mg/m3
5.1E-06
(mg/m3)
NA
(ug/m3)"1
3.6E-04
(mg/m3)
NA
(mg/m3)
Methyl tert-butyl ether
7.7E-03
mg/m3
1.5E-06
(mg/m3)
2.6E-07
(ug/m3)"1
3.9E-10
1.0E-04
(mg/m3)
3.0E+00
(mg/m3)
0.000035
Trichloroethene
2.0E-01
mg/m3
3.8E-05
(mg/m3)
4.1E-06
(ug/m3)"1
1.6E-07
2.7E-03
(mg/m3)
2.0E-03
(mg/m3)
1.3
1,4-Dioxane
2.5E-03
mg/m3
4.9E-07
(mg/m3)
5.0E-06
(ug/m3)"1
2.4E-09
3.4E-05
(mg/m3)
7.2E-01
(mg/m3)
0.000048
Caprolactam
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
2.2E-03
(mg/m3)
Aluminum
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
5.0E-03
(mg/m3)
Antimony
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Arsenic
0.0E+00
mg/m3
0.0E+00
(mg/m3)
4.3E-03
(ug/m3)"1
0.0E+00
(mg/m3)
1.5E-05
(mg/m3)
Barium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
5.0E-03
(mg/m3)
Beryllium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
2.4E-03
(ug/m3)"1
0.0E+00
(mg/m3)
2.0E-05
(mg/m3)
Cadmium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
1.8E-03
(ug/m3)"1
0.0E+00
(mg/m3)
1.0E-05
(mg/m3)
Cobalt
0.0E+00
mg/m3
0.0E+00
(mg/m3)
9.0E-03
(ug/m3)"1
0.0E+00
(mg/m3)
2.0E-05
(mg/m3)
Copper
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Iron
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Lead
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Manganese
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
5.0E-05
(mg/m3)
Mercury
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
3.0E-04
(mg/m3)
Nickel
0.0E+00
mg/m3
0.0E+00
(mg/m3)
2.6E-04
(ug/m3)"1
0.0E+00
(mg/m3)
2.0E-04
(mg/m3)
Selenium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
2.0E-02
(mg/m3)
Thallium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Vanadium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
1.0E-04
(mg/m3)
Zinc
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Exp. Route Total
1.6E-07
1.3
Exposure Point Total
1.6E-07
1.3
Exposure Medium Total
1.6E-07
1.3
Medium Total
2.5E-07
1.4
Total of Receptor Risks Across All Media
4.5E-07
Total of Receptor Hazards Across All Media
2.4
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 7.6.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 3
Scenario Timeframe: Future
Receptor Population: Industrial Worker
Receptor Age: Adult
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Ingestion
Benzo(a)pyrene
0.252
mg/kg
9.5E-09
(mg/kg/day)
1.0E+00
(mg/kg/day)"
9.5E-09
9.5E-08
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00032
Naphthalene
9.8
mg/kg
3.7E-07
(mg/kg/day)
NA
(mg/kg/day)"
3.7E-06
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.00018
Dieldrin
0.11
mg/kg
4.1E-09
(mg/kg/day)
1.6E+01
(mg/kg/day)"
6.6E-08
4.1E-08
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.00083
Aluminum
9940
mg/kg
3.7E-04
(mg/kg/day)
NA
(mg/kg/day)"
3.7E-03
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.0037
Antimony
6.48
mg/kg
2.4E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.4E-06
(mg/kg/day)
4.0E-04
(mg/kg/day)
0.006
Arsenic
3.95
mg/kg
8.9E-08
(mg/kg/day)
1.5E+00
(mg/kg/day)"
1.3E-07
8.9E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0030
Cobalt
6.32
mg/kg
2.4E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.4E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0079
Copper
660
mg/kg
2.5E-05
(mg/kg/day)
NA
(mg/kg/day)"
2.5E-04
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.006
Iron
19200
mg/kg
7.2E-04
(mg/kg/day)
NA
(mg/kg/day)"
7.2E-03
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.010
Lead
71.4
mg/kg
2.7E-06
(mg/kg/day)
NA
(mg/kg/day)"
2.7E-05
(mg/kg/day)
NA
(mg/kg/day)
Manganese
388
mg/kg
1.5E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.5E-04
(mg/kg/day)
2.4E-02
(mg/kg/day)
0.0061
Thallium
2.13
mg/kg
8.0E-08
(mg/kg/day)
NA
(mg/kg/day)"
8.0E-07
(mg/kg/day)
1.0E-05
(mg/kg/day)
0.0799
Vanadium
23.6
mg/kg
8.9E-07
(mg/kg/day)
NA
(mg/kg/day)"
8.9E-06
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.0018
Zinc
380
mg/kg
1.4E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.4E-04
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.00048
Exp. Route Total
2.1E-07
0.13
Dermal
Benzo(a)pyrene
0.252
mg/kg
1.7E-09
(mg/kg/day)
1.0E+00
(mg/kg/day)"
1.7E-09
1.7E-08
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.000058
Naphthalene
9.8
mg/kg
6.7E-08
(mg/kg/day)
NA
(mg/kg/day)"
6.7E-07
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.000034
Dieldrin
0.11
mg/kg
5.8E-10
(mg/kg/day)
1.6E+01
(mg/kg/day)"
9.3E-09
5.8E-09
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.00012
Aluminum
9940
mg/kg
5.3E-06
(mg/kg/day)
NA
(mg/kg/day)"
5.3E-05
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.000053
Antimony
6.48
mg/kg
3.4E-09
(mg/kg/day)
NA
(mg/kg/day)"
3.4E-08
(mg/kg/day)
6.0E-05
(mg/kg/day)
0.00057
Arsenic
3.95
mg/kg
6.3E-09
(mg/kg/day)
1.5E+00
(mg/kg/day)"
9.4E-09
6.3E-08
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00021
Cobalt
6.32
mg/kg
3.3E-09
(mg/kg/day)
NA
(mg/kg/day)"
3.3E-08
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00011
Copper
660
mg/kg
3.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
3.5E-06
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.00009
Iron
19200
mg/kg
1.0E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.0E-04
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.00015
Lead
71.4
mg/kg
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)"
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)
Manganese
388
mg/kg
2.1E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.1E-06
(mg/kg/day)
9.6E-04
(mg/kg/day)
0.0021
Thallium
2.13
mg/kg
1.1E-09
(mg/kg/day)
NA
(mg/kg/day)"
1.1E-08
(mg/kg/day)
1.0E-05
(mg/kg/day)
0.0011
Vanadium
23.6
mg/kg
1.2E-08
(mg/kg/day)
NA
(mg/kg/day)"
1.2E-07
(mg/kg/day)
1.3E-04
(mg/kg/day)
0.0010
Zinc
380
mg/kg
2.0E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.0E-06
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.000007
Exp. Route Total
2.0E-08
0.0056
Exposure Point Total
2.3E-07
0.13
Exposure Medium Total
2.3E-07
0.13
Air
OWR
Inhalation
Benzo(a)pyrene
7.8E-11
mg/m3
1.6E-12
(mg/m3)
6.0E-04
(ug/m3)"1
9.3E-13
1.6E-11
(mg/m3)
2.0E-06
(mg/m3)
0.0000078
Naphthalene
1.7E-04
mg/m3
3.3E-06
(mg/m3)
3.4E-05
(ug/m3)"1
1.1E-07
3.3E-05
(mg/m3)
3.0E-03
(mg/m3)
0.011
Dieldrin
3.4E-11
mg/m3
6.8E-13
(mg/m3)
4.6E-03
(ug/m3)"1
3.1E-12
6.8E-12
(mg/m3)
NA
(mg/m3)
Aluminum
3.1E-06
mg/m3
6.1E-08
(mg/m3)
NA
(ug/m3)"1
6.1E-07
(mg/m3)
5.0E-03
(mg/m3)
0.00012
Antimony
2.0E-09
mg/m3
4.0E-11
(mg/m3)
NA
(ug/m3)"1
4.0E-10
(mg/m3)
NA
(mg/m3)
Arsenic
1.2E-09
mg/m3
2.4E-11
(mg/m3)
4.3E-03
(ug/m3)"1
1.0E-10
2.4E-10
(mg/m3)
1.5E-05
(mg/m3)
0.000016
Cobalt
2.0E-09
mg/m3
3.9E-11
(mg/m3)
9.0E-03
(ug/m3)"1
3.5E-10
3.9E-10
(mg/m3)
6.0E-06
(mg/m3)
0.000065
Copper
2.0E-07
mg/m3
4.1E-09
(mg/m3)
NA
(ug/m3)"1
4.1E-08
(mg/m3)
NA
(mg/m3)
Iron
5.9E-06
mg/m3
1.2E-07
(mg/m3)
NA
(ug/m3)"1
1.2E-06
(mg/m3)
NA
(mg/m3)
Lead
2.2E-08
mg/m3
4.4E-10
(mg/m3)
NA
(ug/m3)"1
4.4E-09
(mg/m3)
NA
(mg/m3)
Manganese
1.2E-07
mg/m3
2.4E-09
(mg/m3)
NA
(ug/m3)"1
2.4E-08
(mg/m3)
5.0E-05
(mg/m3)
0.00048
Thallium
6.6E-10
mg/m3
1.3E-11
(mg/m3)
NA
(ug/m3)"1
1.3E-10
(mg/m3)
NA
(mg/m3)
Vanadium
7.3E-09
mg/m
1.5E-10
(mg/m3)
NA
(ug/m3)"1
1.5E-09
(mg/m3)
1.0E-04
(mg/m3)
0.000015
Zinc
1.2E-07
mg/m3
2.3E-09
(mg/m3)
NA
(ug/m3)"1
2.3E-08
(mg/m3)
NA
(mg/m3)
Exp. Route Total
1.1E-07
0.012
Exposure Point Total
1.1E-07
0.012
Exposure Medium Total
1.1E-07
0.012
Medium Total
3.4E-07
0.14
-------
TABLE 7.6.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 3
Scenario Timeframe: Future
Receptor Population: Industrial Worker
Receptor Age: Adult
Exposure Medium
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Ingestion
2-Butanone
1300
ug/L
5.5E-04
(mg/kg/day)
NA
(mg/kg/day)"
5.9E-03
(mg/kg/day)
6.0E-01
(mg/kg/day)
0.0098
2-Hexanone
41
ug/L
1.7E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.8E-04
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.037
Chloroform
9.4
ug/L
4.0E-06
(mg/kg/day)
3.1E-02
(mg/kg/day)"
1.2E-07
4.2E-05
(mg/kg/day)
1.0E-02
(mg/kg/day)
0.0042
cis-1,2-Dichloroethene
1.88
ug/L
8.0E-07
(mg/kg/day)
NA
(mg/kg/day)"
8.5E-06
(mg/kg/day)
2.0E-03
(mg/kg/day)
0.0042
Methyl Tert-Butyl Ether
15
ug/L
6.4E-06
(mg/kg/day)
1.8E-03
(mg/kg/day)"
1.1E-08
6.8E-05
(mg/kg/day)
NA
(mg/kg/day)
Tetrachloroethene
65.7
ug/L
2.8E-05
(mg/kg/day)
2.1E-03
(mg/kg/day)"
5.9E-08
3.0E-04
(mg/kg/day)
6.0E-03
(mg/kg/day)
0.049
Trichloroethene
10.6
ug/L
4.5E-06
(mg/kg/day)
4.6E-02
(mg/kg/day)"
2.1E-07
4.8E-05
(mg/kg/day)
5.0E-04
(mg/kg/day)
0.095
Vinyl Chloride
0.57
ug/L
2.4E-07
(mg/kg/day)
7.2E-01
(mg/kg/day)"
1.7E-07
2.6E-06
(mg/kg/day)
3.0E-03
(mg/kg/day)
0.00086
1,4-Dioxane
3.84
ug/L
1.6E-06
(mg/kg/day)
1.0E-01
(mg/kg/day)"
1.6E-07
1.7E-05
(mg/kg/day)
3.0E-02
(mg/kg/day)
0.00058
Bis(2-ethylhexyl)phthalate
11
ug/L
4.7E-06
(mg/kg/day)
1.4E-02
(mg/kg/day)"
6.5E-08
5.0E-05
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.0025
Caprolactam
2800
ug/L
1.2E-03
(mg/kg/day)
NA
(mg/kg/day)"
1.3E-02
(mg/kg/day)
5.0E-01
(mg/kg/day)
0.025
Aluminum
57655
ug/L
2.4E-02
(mg/kg/day)
NA
(mg/kg/day)"
2.6E-01
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.26
Antimony
1.31
ug/L
5.6E-07
(mg/kg/day)
NA
(mg/kg/day)"
5.9E-06
(mg/kg/day)
4.0E-04
(mg/kg/day)
0.015
Arsenic
12.8
ug/L
5.4E-06
(mg/kg/day)
1.5E+00
(mg/kg/day)"
8.1E-06
5.8E-05
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.19
Barium
674
ug/L
2.9E-04
(mg/kg/day)
NA
(mg/kg/day)"
3.0E-03
(mg/kg/day)
2.0E-01
(mg/kg/day)
0.015
Beryllium
3.46
ug/L
1.5E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.6E-05
(mg/kg/day)
2.0E-03
(mg/kg/day)
0.0078
Cadmium
0.424
ug/L
1.8E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.9E-06
(mg/kg/day)
5.0E-04
(mg/kg/day)
0.0038
Cobalt
63.9
ug/L
2.7E-05
(mg/kg/day)
NA
(mg/kg/day)"
2.9E-04
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.96
Copper
75.2
ug/L
3.2E-05
(mg/kg/day)
NA
(mg/kg/day)"
3.4E-04
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.0085
Iron
45400
ug/L
1.9E-02
(mg/kg/day)
NA
(mg/kg/day)"
2.0E-01
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.29
Lead
23.1
ug/L
9.8E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.0E-04
(mg/kg/day)
NA
(mg/kg/day)
Manganese
2525
ug/L
1.1E-03
(mg/kg/day)
NA
(mg/kg/day)"
1.1E-02
(mg/kg/day)
2.4E-02
(mg/kg/day)
0.47
Mercury
0.128
ug/L
5.4E-08
(mg/kg/day)
NA
(mg/kg/day)"
5.8E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0019
Nickel
51.7
ug/L
2.2E-05
(mg/kg/day)
NA
(mg/kg/day)"
2.3E-04
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.012
Selenium
3.1
ug/L
1.3E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.4E-05
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.0028
Thallium
0.539
ug/L
2.3E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.4E-06
(mg/kg/day)
1.0E-05
(mg/kg/day)
0.24
Vanadium
12.3
ug/L
5.2E-06
(mg/kg/day)
NA
(mg/kg/day)"
5.5E-05
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.011
Zinc
378
ug/L
1.6E-04
(mg/kg/day)
NA
(mg/kg/day)"
1.7E-03
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.0057
Exp. Route Total
8.9E-06
2.7
Dermal
2-Butanone
1300
ug/L
2.0E-06
(mg/kg/day)
NA
(mg/kg/day)"
2.1E-05
(mg/kg/day)
6.0E-01
(mg/kg/day)
0.000035
2-Hexanone
41
ug/L
2.6E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.8E-06
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.00056
Chloroform
9.4
ug/L
9.3E-08
(mg/kg/day)
3.1E-02
(mg/kg/day)"
2.9E-09
9.9E-07
(mg/kg/day)
1.0E-02
(mg/kg/day)
0.00010
cis-1,2-Dichloroethene
1.88
ug/L
2.4E-08
(mg/kg/day)
NA
(mg/kg/day)"
2.6E-07
(mg/kg/day)
2.0E-03
(mg/kg/day)
0.00013
Methyl Tert-Butyl Ether
15
ug/L
4.0E-08
(mg/kg/day)
1.8E-03
(mg/kg/day)"
7.2E-11
4.2E-07
(mg/kg/day)
NA
(mg/kg/day)
Tetrachloroethene
65.7
ug/L
4.5E-06
(mg/kg/day)
2.1E-03
(mg/kg/day)"
9.5E-09
4.8E-05
(mg/kg/day)
6.0E-03
(mg/kg/day)
0.008
Trichloroethene
10.6
ug/L
1.9E-07
(mg/kg/day)
4.6E-02
(mg/kg/day)"
8.9E-09
2.0E-06
(mg/kg/day)
5.0E-04
(mg/kg/day)
0.0041
Vinyl Chloride
0.57
ug/L
3.8E-09
(mg/kg/day)
7.2E-01
(mg/kg/day)"
2.7E-09
4.0E-08
(mg/kg/day)
3.0E-03
(mg/kg/day)
0.000013
1,4-Dioxane
3.84
ug/L
2.5E-09
(mg/kg/day)
1.0E-01
(mg/kg/day)"
2.5E-10
2.6E-08
(mg/kg/day)
3.0E-02
(mg/kg/day)
0.00000088
Bis(2-ethylhexyl)phthalate
11
ug/L
0.0E+00
(mg/kg/day)
1.4E-02
(mg/kg/day)"
0.0E+00
(mg/kg/day)
2.0E-02
(mg/kg/day)
Caprolactam
2800
ug/L
6.5E-06
(mg/kg/day)
NA
(mg/kg/day)"
6.9E-05
(mg/kg/day)
5.0E-01
(mg/kg/day)
0.00014
Aluminum
57655
ug/L
3.6E-05
(mg/kg/day)
NA
(mg/kg/day)"
3.8E-04
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.00038
Antimony
1.31
ug/L
8.2E-10
(mg/kg/day)
NA
(mg/kg/day)"
8.7E-09
(mg/kg/day)
6.0E-05
(mg/kg/day)
0.00014
Arsenic
12.8
ug/L
8.0E-09
(mg/kg/day)
1.5E+00
(mg/kg/day)"
1.2E-08
8.5E-08
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00028
Barium
674
ug/L
4.2E-07
(mg/kg/day)
NA
(mg/kg/day)"
4.5E-06
(mg/kg/day)
1.4E-02
(mg/kg/day)
0.00032
Beryllium
3.46
ug/L
2.2E-09
(mg/kg/day)
NA
(mg/kg/day)"
2.3E-08
(mg/kg/day)
1.4E-05
(mg/kg/day)
0.0016
Cadmium
0.424
ug/L
2.6E-10
(mg/kg/day)
NA
(mg/kg/day)"
2.8E-09
(mg/kg/day)
2.5E-05
(mg/kg/day)
0.00011
Cobalt
63.9
ug/L
1.6E-08
(mg/kg/day)
NA
(mg/kg/day)"
1.7E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00056
Copper
75.2
ug/L
4.7E-08
(mg/kg/day)
NA
(mg/kg/day)"
5.0E-07
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.000012
Iron
45400
ug/L
2.8E-05
(mg/kg/day)
NA
(mg/kg/day)"
3.0E-04
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.00043
Lead
23.1
ug/L
1.4E-09
(mg/kg/day)
NA
(mg/kg/day)"
1.5E-08
(mg/kg/day)
NA
(mg/kg/day)
Manganese
2525
ug/L
1.6E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.7E-05
(mg/kg/day)
9.6E-04
(mg/kg/day)
0.017
Mercury
0.128
ug/L
8.0E-11
(mg/kg/day)
NA
(mg/kg/day)"
8.5E-10
(mg/kg/day)
2.1E-05
(mg/kg/day)
0.000040
Nickel
51.7
ug/L
6.4E-09
(mg/kg/day)
NA
(mq/kq/dav)
6.8E-08
(mg/kg/day)
8.0E-04
(mg/kg/day)
0.000085
Groundwater
Groundwater
-------
TABLE 7.6.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 3 OF 3
Scenario Timeframe: Future
Receptor Population: Industrial Worker
Receptor Age: Adult
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Groundwater
Groundwater
OWRGC
Dermal
Selenium
3.1
ug/L
1.9E-09
(mg/kg/day)
NA
(mg/kg/day)"1
2.1E-08
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.0000041
Thallium
0.539
ug/L
3.4E-10
(mg/kg/day)
NA
(mg/kg/day)"1
3.6E-09
(mg/kg/day)
1.0E-05
(mg/kg/day)
0.00036
Vanadium
12.3
ug/L
7.7E-09
(mg/kg/day)
NA
(mg/kg/day)"1
8.1E-08
(mg/kg/day)
1.3E-04
(mg/kg/day)
0.00063
Zinc
378
ug/L
1.4E-07
(mg/kg/day)
NA
(mg/kg/day)"1
1.5E-06
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.0000050
Exp. Route Total
3.6E-08
0.035
Exposure Point Total
9.0E-06
2.8
Exposure Medium Total
9.0E-06
2.8
Air
OWR
Inhalation
2-Butanone
1.7E-02
mg/m3
9.5E-04
(mg/m3)
NA
(ug/m3)"1
1.0E-02
(mg/m3)
5.0E+00
(mg/m3)
0.0020
2-Hexanone
6.5E-04
mg/m3
3.7E-05
(mg/m3)
NA
(ug/m3)"1
3.9E-04
(mg/m3)
3.0E-02
(mg/m3)
0.013
Chloroform
4.0E-04
mg/m3
2.3E-05
(mg/m3)
2.3E-05
(ug/m3)"1
5.2E-07
2.4E-04
(mg/m3)
9.8E-02
(mg/m3)
0.0024
cis-1,2-Dichloroethene
8.7E-05
mg/m3
4.9E-06
(mg/m3)
NA
(ug/m3)"1
5.2E-05
(mg/m3)
NA
(mg/m3)
Methyl Tert-Butyl Ether
5.7E-04
mg/m3
3.2E-05
(mg/m3)
2.6E-07
(ug/m3)"1
8.4E-09
3.4E-04
(mg/m3)
3.0E+00
(mg/m3)
0.00011
Tetrachloroethene
2.6E-03
mg/m3
1.4E-04
(mg/m3)
2.6E-07
(ug/m3)"1
3.8E-08
1.5E-03
(mg/m3)
4.0E-02
(mg/m3)
0.038
Trichloroethene
4.5E-04
mg/m3
2.5E-05
(mg/m3)
4.1E-06
(ug/m3)"1
1.0E-07
2.7E-04
(mg/m3)
2.0E-03
(mg/m3)
0.13
Vinyl Chloride
3.2E-05
mg/m3
1.8E-06
(mg/m3)
4.4E-06
(ug/m3)"1
7.9E-09
1.9E-05
(mg/m3)
1.0E-01
(mg/m3)
0.00019
1,4-Dioxane
4.8E-06
mg/m3
2.7E-07
(mg/m3)
5.0E-06
(ug/m3)"1
1.4E-09
2.9E-06
(mg/m3)
3.0E-02
(mg/m3)
0.000097
Bis(2-ethylhexyl)phthalate
0.0E+00
mg/m3
0.0E+00
(mg/m3)
2.4E-06
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Caprolactam
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
2.2E-03
(mg/m3)
Aluminum
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
5.0E-03
(mg/m3)
Antimony
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Arsenic
0.0E+00
mg/m3
0.0E+00
(mg/m3)
4.3E-03
(ug/m3)"1
0.0E+00
(mg/m3)
1.5E-05
(mg/m3)
Barium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
5.0E-04
(mg/m3)
Beryllium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
2.4E-03
(ug/m3)"1
0.0E+00
(mg/m3)
2.0E-05
(mg/m3)
Cadmium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
1.8E-03
(ug/m3)"1
0.0E+00
(mg/m3)
1.0E-05
(mg/m3)
Cobalt
0.0E+00
mg/m3
0.0E+00
(mg/m3)
9.0E-03
(ug/m3)"1
0.0E+00
(mg/m3)
6.0E-06
(mg/m3)
Copper
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Iron
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Lead
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Manganese
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
5.0E-05
(mg/m3)
Mercury
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
3.0E-04
(mg/m3)
Nickel
0.0E+00
mg/m3
0.0E+00
(mg/m3)
2.6E-04
(ug/m3)"1
0.0E+00
(mg/m3)
9.0E-05
(mg/m3)
Selenium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
2.0E-02
(mg/m3)
Thallium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Vanadium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
1.0E-04
(mg/m3)
Zinc
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Exp. Route Total
6.8E-07
0.19
Exposure Point Total
6.8E-07
0.19
Exposure Medium Total
6.8E-07
0.19
Medium Total
9.7E-06
3.0
Total of Receptor Risks Across All Media
1.0E-05
Total of Receptor Hazards Across All Media
3.1
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 7.7.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 3
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Child
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Ingestion
Benzo(a)pyrene
0.252
mg/kg
2.0E-07
(mg/kg/day)
1.0E+00
(mg/kg/day)"
2.0E-07
1.1E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0036
Naphthalene
9.8
mg/kg
1.2E-06
(mg/kg/day)
NA
(mg/kg/day)"
4.2E-05
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.0021
Dieldrin
0.11
mg/kg
1.3E-08
(mg/kg/day)
1.6E+01
(mg/kg/day)"
2.1E-07
4.7E-07
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.0094
Aluminum
9940
mg/kg
1.2E-03
(mg/kg/day)
NA
(mg/kg/day)"
4.2E-02
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.042
Antimony
6.48
mg/kg
7.9E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.8E-05
(mg/kg/day)
4.0E-04
(mg/kg/day)
0.069
Arsenic
3.95
mg/kg
2.9E-07
(mg/kg/day)
1.5E+00
(mg/kg/day)"
4.3E-07
1.0E-05
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.034
Cobalt
6.32
mg/kg
7.7E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.7E-05
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.090
Copper
660
mg/kg
8.1E-05
(mg/kg/day)
NA
(mg/kg/day)"
2.8E-03
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.071
Iron
19200
mg/kg
2.3E-03
(mg/kg/day)
NA
(mg/kg/day)"
8.2E-02
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.12
Lead
71.4
mg/kg
8.7E-06
(mg/kg/day)
NA
(mg/kg/day)"
3.1E-04
(mg/kg/day)
NA
(mg/kg/day)
Manganese
388
mg/kg
4.7E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.7E-03
(mg/kg/day)
2.4E-02
(mg/kg/day)
0.069
Thallium
2.13
mg/kg
2.6E-07
(mg/kg/day)
NA
(mg/kg/day)"
9.1E-06
(mg/kg/day)
1.0E-05
(mg/kg/day)
0.91
Vanadium
23.6
mg/kg
2.9E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.0E-04
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.020
Zinc
380
mg/kg
4.6E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.6E-03
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.0054
Exp. Route Total
8.5E-07
1.4
Dermal
Benzo(a)pyrene
0.252
mg/kg
2.5E-08
(mg/kg/day)
1.0E+00
(mg/kg/day)"
2.5E-08
1.3E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00044
Naphthalene
9.8
mg/kg
1.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
5.2E-06
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.00026
Dieldrin
0.11
mg/kg
1.3E-09
(mg/kg/day)
1.6E+01
(mg/kg/day)"
2.0E-08
4.5E-08
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.00089
Aluminum
9940
mg/kg
1.2E-05
(mg/kg/day)
NA
(mg/kg/day)"
4.0E-04
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.00040
Antimony
6.48
mg/kg
7.5E-09
(mg/kg/day)
NA
(mg/kg/day)"
2.6E-07
(mg/kg/day)
6.0E-05
(mg/kg/day)
0.0044
Arsenic
3.95
mg/kg
1.4E-08
(mg/kg/day)
1.5E+00
(mg/kg/day)"
2.1E-08
4.8E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0016
Cobalt
6.32
mg/kg
7.3E-09
(mg/kg/day)
NA
(mg/kg/day)"
2.6E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00085
Copper
660
mg/kg
7.7E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.7E-05
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.00067
Iron
19200
mg/kg
2.2E-05
(mg/kg/day)
NA
(mg/kg/day)"
7.8E-04
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.0011
Lead
71.4
mg/kg
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)"
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)
Manganese
388
mg/kg
4.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.6E-05
(mg/kg/day)
9.6E-04
(mg/kg/day)
0.016
Thallium
2.13
mg/kg
2.5E-09
(mg/kg/day)
NA
(mg/kg/day)"
8.6E-08
(mg/kg/day)
1.0E-05
(mg/kg/day)
0.0086
Vanadium
23.6
mg/kg
2.7E-08
(mg/kg/day)
NA
(mg/kg/day)"
9.6E-07
(mg/kg/day)
1.3E-04
(mg/kg/day)
0.0074
Zinc
380
mg/kg
4.4E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.5E-05
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.000051
Exp. Route Total
6.6E-08
0.043
Exposure Point Total
9.1E-07
1.5
Exposure Medium Total
9.1E-07
1.5
Air
OWR
Inhalation
Benzo(a)pyrene
7.8E-11
mg/m3
9.3E-12
(mg/m3)
6.0E-04
(ug/m3)"1
5.6E-12
5.0E-11
(mg/m3)
2.0E-06
(mg/m3)
0.000025
Naphthalene
1.7E-04
mg/m3
3.0E-06
(mg/m3)
3.4E-05
(ug/m3)"1
1.0E-07
1.1E-04
(mg/m3)
3.0E-03
(mg/m3)
0.035
Dieldrin
3.4E-11
mg/m3
6.2E-13
(mg/m3)
4.6E-03
(ug/m3)"1
2.9E-12
2.2E-11
(mg/m3)
NA
(mg/m3)
Aluminum
3.1E-06
mg/m3
5.6E-08
(mg/m3)
NA
(ug/m3)"1
2.0E-06
(mg/m3)
5.0E-03
(mg/m3)
0.00039
Antimony
2.0E-09
mg/m3
3.7E-11
(mg/m3)
NA
(ug/m3)"1
1.3E-09
(mg/m3)
NA
(mg/m3)
Arsenic
1.2E-09
mg/m3
2.2E-11
(mg/m3)
4.3E-03
(ug/m3)"1
9.6E-11
7.8E-10
(mg/m3)
1.5E-05
(mg/m3)
0.000052
Cobalt
2.0E-09
mg/m3
3.6E-11
(mg/m3)
9.0E-03
(ug/m3)"1
3.2E-10
1.3E-09
(mg/m3)
6.0E-06
(mg/m3)
0.00021
Copper
2.0E-07
mg/m3
3.7E-09
(mg/m3)
NA
(ug/m3)"1
1.3E-07
(mg/m3)
NA
(mg/m3)
Iron
5.9E-06
mg/m3
1.1E-07
(mg/m3)
NA
(ug/m3)"1
3.8E-06
(mg/m3)
NA
(mg/m3)
Lead
2.2E-08
mg/m3
4.0E-10
(mg/m3)
NA
(ug/m3)"1
1.4E-08
(mg/m3)
NA
(mg/m3)
Manganese
1.2E-07
mg/m3
2.2E-09
(mg/m3)
NA
(ug/m3)"1
7.7E-08
(mg/m3)
5.0E-05
(mg/m3)
0.0015
Thallium
6.6E-10
mg/m3
1.2E-11
(mg/m3)
NA
(ug/m3)"1
4.2E-10
(mg/m3)
NA
(mg/m3)
Vanadium
7.3E-09
mg/m3
1.3E-10
(mg/m3)
NA
(ug/m3)"1
4.7E-09
(mg/m3)
1.0E-04
(mg/m3)
0.000047
Zinc
1.2E-07
mg/m3
2.1E-09
(mg/m3)
NA
(ug/m3)"1
7.5E-08
(mg/m3)
NA
(mg/m3)
Exp. Route Total
1.0E-07
0.038
Exposure Point Total
1.0E-07
0.038
Exposure Medium Total
1.0E-07
0.038
Medium Total
1.0E-06
1.5
-------
TABLE 7.7.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 3
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Child
Exposure Medium
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Ingestion
2-Butanone
1300
ug/L
1.1E-03
(mg/kg/day)
NA
(mg/kg/day)"
2.5E-02
(mg/kg/day)
6.0E-01
(mg/kg/day)
0.042
2-Hexanone
41
ug/L
3.4E-05
(mg/kg/day)
NA
(mg/kg/day)"
7.9E-04
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.16
Chloroform
9.4
ug/L
7.7E-06
(mg/kg/day)
3.1E-02
(mg/kg/day)"
2.4E-07
1.8E-04
(mg/kg/day)
1.0E-02
(mg/kg/day)
0.018
cis-1,2-Dichloroethene
1.88
ug/L
1.5E-06
(mg/kg/day)
NA
(mg/kg/day)"
3.6E-05
(mg/kg/day)
2.0E-03
(mg/kg/day)
0.018
Methyl Tert-Butyl Ether
15
ug/L
1.2E-05
(mg/kg/day)
1.8E-03
(mg/kg/day)"
2.2E-08
2.9E-04
(mg/kg/day)
NA
(mg/kg/day)
Tetrachloroethene
65.7
ug/L
5.4E-05
(mg/kg/day)
2.1E-03
(mg/kg/day)"
1.1E-07
1.3E-03
(mg/kg/day)
6.0E-03
(mg/kg/day)
0.21
Trichloroethene (Mutagenic)
10.6
ug/L
6.7E-05
(mg/kg/day)
9.3E-03
(mg/kg/day)"
6.2E-07
2.0E-04
(mg/kg/day)
NA
(mg/kg/day)
Trichloroethene (Nonmutagenic
10.6
ug/L
8.7E-06
(mg/kg/day)
3.7E-02
(mg/kg/day)"
3.2E-07
2.0E-04
(mg/kg/day)
5.0E-04
(mg/kg/day)
0.41
Vinyl Chloride
0.57
ug/L
1.8E-05
(mg/kg/day)
7.2E-01
(mg/kg/day)"
1.3E-05
1.1E-05
(mg/kg/day)
3.0E-03
(mg/kg/day)
0.0037
1,4-Dioxane
3.84
ug/L
3.2E-06
(mg/kg/day)
1.0E-01
(mg/kg/day)"
3.2E-07
7.4E-05
(mg/kg/day)
3.0E-02
(mg/kg/day)
0.0025
Bis(2-ethylhexyl)phthalate
11
ug/L
9.1E-06
(mg/kg/day)
1.4E-02
(mg/kg/day)"
1.3E-07
2.1E-04
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.011
Caprolactam
2800
ug/L
2.3E-03
(mg/kg/day)
NA
(mg/kg/day)"
5.4E-02
(mg/kg/day)
5.0E-01
(mg/kg/day)
0.11
Aluminum
57655
ug/L
4.8E-02
(mg/kg/day)
NA
(mg/kg/day)"
1.1E+00
(mg/kg/day)
1.0E+00
(mg/kg/day)
1.11
Antimony
1.31
ug/L
1.1E-06
(mg/kg/day)
NA
(mg/kg/day)"
2.5E-05
(mg/kg/day)
4.0E-04
(mg/kg/day)
0.063
Arsenic
12.8
ug/L
1.1E-05
(mg/kg/day)
1.5E+00
(mg/kg/day)"
1.6E-05
2.5E-04
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.82
Barium
674
ug/L
5.6E-04
(mg/kg/day)
NA
(mg/kg/day)"
1.3E-02
(mg/kg/day)
2.0E-01
(mg/kg/day)
0.065
Beryllium
3.46
ug/L
2.9E-06
(mg/kg/day)
NA
(mg/kg/day)"
6.7E-05
(mg/kg/day)
2.0E-03
(mg/kg/day)
0.033
Cadmium
0.424
ug/L
3.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
8.2E-06
(mg/kg/day)
5.0E-04
(mg/kg/day)
0.016
Cobalt
63.9
ug/L
5.3E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.2E-03
(mg/kg/day)
3.0E-04
(mg/kg/day)
4.1
Copper
75.2
ug/L
6.2E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.4E-03
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.0362
Iron
45400
ug/L
3.7E-02
(mg/kg/day)
NA
(mg/kg/day)"
8.7E-01
(mg/kg/day)
7.0E-01
(mg/kg/day)
1.25
Lead
23.1
ug/L
1.9E-05
(mg/kg/day)
NA
(mg/kg/day)"
4.4E-04
(mg/kg/day)
NA
(mg/kg/day)
Manganese
2525
ug/L
2.1E-03
(mg/kg/day)
NA
(mg/kg/day)"
4.9E-02
(mg/kg/day)
2.4E-02
(mg/kg/day)
2.0
Mercury
0.128
ug/L
1.1E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.5E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0082
Nickel
51.7
ug/L
4.3E-05
(mg/kg/day)
NA
(mg/kg/day)"
9.9E-04
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.050
Selenium
3.1
ug/L
2.6E-06
(mg/kg/day)
NA
(mg/kg/day)"
6.0E-05
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.012
Thallium
0.539
ug/L
4.4E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.0E-05
(mg/kg/day)
1.0E-05
(mg/kg/day)
1.04
Vanadium
12.3
ug/L
1.0E-05
(mg/kg/day)
NA
(mg/kg/day)"
2.4E-04
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.047
Zinc
378
ug/L
3.1E-04
(mg/kg/day)
NA
(mg/kg/day)"
7.3E-03
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.024
Exp. Route Total
3.0E-05
12
Dermal
2-Butanone
1300
ug/L
1.2E-05
(mg/kg/day)
NA
(mg/kg/day)"
2.8E-04
(mg/kg/day)
6.0E-01
(mg/kg/day)
0.00046
2-Hexanone
41
ug/L
1.7E-06
(mg/kg/day)
NA
(mg/kg/day)"
3.9E-05
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.0078
Chloroform
9.4
ug/L
8.3E-07
(mg/kg/day)
3.1E-02
(mg/kg/day)"
2.6E-08
1.9E-05
(mg/kg/day)
1.0E-02
(mg/kg/day)
0.0019
cis-1,2-Dichloroethene
1.88
ug/L
2.3E-07
(mg/kg/day)
NA
(mg/kg/day)"
5.4E-06
(mg/kg/day)
2.0E-03
(mg/kg/day)
0.0027
Methyl Tert-Butyl Ether
15
ug/L
3.4E-07
(mg/kg/day)
1.8E-03
(mg/kg/day)"
6.0E-10
7.8E-06
(mg/kg/day)
NA
(mg/kg/day)
Tetrachloroethene
65.7
ug/L
3.8E-05
(mg/kg/day)
2.1E-03
(mg/kg/day)"
8.1E-08
9.0E-04
(mg/kg/day)
6.0E-03
(mg/kg/day)
0.15
Trichloroethene (Mutagenic)
10.6
ug/L
1.3E-05
(mg/kg/day)
9.3E-03
(mg/kg/day)"
1.2E-07
4.0E-05
(mg/kg/day)
NA
(mg/kg/day)
Trichloroethene (Nonmutagenic
10.6
ug/L
1.7E-06
(mg/kg/day)
3.7E-02
(mg/kg/day)"
6.4E-08
4.0E-05
(mg/kg/day)
5.0E-04
(mg/kg/day)
0.080
Vinyl Chloride
0.57
ug/L
1.6E-06
(mg/kg/day)
7.2E-01
(mg/kg/day)"
1.2E-06
1.0E-06
(mg/kg/day)
3.0E-03
(mg/kg/day)
0.00033
1,4-Dioxane
3.84
ug/L
1.4E-08
(mg/kg/day)
1.0E-01
(mg/kg/day)"
1.4E-09
3.2E-07
(mg/kg/day)
3.0E-02
(mg/kg/day)
0.000011
Bis(2-ethylhexyl)phthalate
11
ug/L
0.0E+00
(mg/kg/day)
1.4E-02
(mg/kg/day)"
0.0E+00
(mg/kg/day)
2.0E-02
(mg/kg/day)
Caprolactam
2800
ug/L
3.5E-05
(mg/kg/day)
NA
(mg/kg/day)"
8.1E-04
(mg/kg/day)
5.0E-01
(mg/kg/day)
0.0016
Aluminum
57655
ug/L
2.2E-04
(mg/kg/day)
NA
(mg/kg/day)"
5.2E-03
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.0052
Antimony
1.31
ug/L
5.0E-09
(mg/kg/day)
NA
(mg/kg/day)"
1.2E-07
(mg/kg/day)
6.0E-05
(mg/kg/day)
0.0020
Arsenic
12.8
ug/L
4.9E-08
(mg/kg/day)
1.5E+00
(mg/kg/day)"
7.4E-08
1.1E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0038
Barium
674
ug/L
2.6E-06
(mg/kg/day)
NA
(mg/kg/day)"
6.1E-05
(mg/kg/day)
1.4E-02
(mg/kg/day)
0.0043
Beryllium
3.46
ug/L
1.3E-08
(mg/kg/day)
NA
(mg/kg/day)"
3.1E-07
(mg/kg/day)
1.4E-05
(mg/kg/day)
0.022
Cadmium
0.424
ug/L
1.6E-09
(mg/kg/day)
NA
(mg/kg/day)"
3.8E-08
(mg/kg/day)
2.5E-05
(mg/kg/day)
0.0015
Cobalt
63.9
ug/L
9.8E-08
(mg/kg/day)
NA
(mg/kg/day)"
2.3E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0076
Copper
75.2
ug/L
2.9E-07
(mg/kg/day)
NA
(mg/kg/day)"
6.8E-06
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.000169
Iron
45400
ug/L
1.7E-04
(mg/kg/day)
NA
(mg/kg/day)"
4.1E-03
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.0058
Lead
23.1
ug/L
8.9E-09
(mg/kg/day)
NA
(mg/kg/day)"
2.1E-07
(mg/kg/day)
NA
(mg/kg/day)
Manganese
2525
ug/L
9.7E-06
(mg/kg/day)
NA
(mq/kq/dav)
2.3E-04
(mg/kg/day)
9.6E-04
(mg/kg/day)
0.24
Groundwater
Groundwater
-------
TABLE 7.7.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 3 OF 3
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Child
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Groundwater
Groundwater
OWRGC
Dermal
Mercury
0.128
ug/L
4.9E-10
(mg/kg/day)
NA
(mg/kg/day)"
1.1E-08
(mg/kg/day)
2.1E-05
(mg/kg/day)
0.00055
Nickel
51.7
ug/L
4.0E-08
(mg/kg/day)
NA
(mg/kg/day)"
9.3E-07
(mg/kg/day)
8.0E-04
(mg/kg/day)
0.0012
Selenium
3.1
ug/L
1.2E-08
(mg/kg/day)
NA
(mg/kg/day)"
2.8E-07
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.000056
Thallium
0.539
ug/L
2.1E-09
(mg/kg/day)
NA
(mg/kg/day)"
4.8E-08
(mg/kg/day)
1.0E-05
(mg/kg/day)
0.0048
Vanadium
12.3
ug/L
4.7E-08
(mg/kg/day)
NA
(mg/kg/day)"
1.1E-06
(mg/kg/day)
1.3E-04
(mg/kg/day)
0.0085
Zinc
378
ug/L
8.7E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.0E-05
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.000068
Exp. Route Total
1.5E-06
0.55
Exposure Point Total
3.2E-05
12
Exposure Medium Total
3.2E-05
12
Medium Total
3.2E-05
12
Sediment
Sediment
OWR
Ingestion
Cobalt
14
mg/kg
1.9E-07
(mg/kg/day)
NA
(mg/kg/day)"1
6.6E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.022
Nickel
1500
mg/kg
2.0E-05
(mg/kg/day)
NA
(mg/kg/day)"1
7.1E-04
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.036
Exp. Route Total
0.058
Dermal
Cobalt
14
mg/kg
1.8E-09
(mg/kg/day)
NA
(mg/kg/day)"1
6.3E-08
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.000
Nickel
1500
mg/kg
1.9E-07
(mg/kg/day)
NA
(mg/kg/day)"1
6.8E-06
(mg/kg/day)
8.0E-04
(mg/kg/day)
0.0085
Exp. Route Total
0.009
Exposure Point Total
0.07
Exposure Medium Total
0.07
Medium Total
0.07
Total of Receptor Risks Across All Media
3.3E-05
Total of Receptor Hazards Across All Media
14
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 7.8.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 4
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Adult
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Ingestion
Benzo(a)pyrene
0.252
mg/kg
1.6E-08
(mg/kg/day)
1.0E+00
(mg/kg/day)"
1.6E-08
1.0E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00034
Naphthalene
9.8
mg/kg
3.9E-07
(mg/kg/day)
NA
(mg/kg/day)"
3.9E-06
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.00020
Dieldrin
0.11
mg/kg
4.4E-09
(mg/kg/day)
1.6E+01
(mg/kg/day)"
7.1E-08
4.4E-08
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.00088
Aluminum
9940
mg/kg
4.0E-04
(mg/kg/day)
NA
(mg/kg/day)"
4.0E-03
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.0040
Antimony
6.48
mg/kg
2.6E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.6E-06
(mg/kg/day)
4.0E-04
(mg/kg/day)
0.0065
Arsenic
3.95
mg/kg
9.5E-08
(mg/kg/day)
1.5E+00
(mg/kg/day)"
1.4E-07
9.5E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0032
Cobalt
6.32
mg/kg
2.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
2.5E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0084
Copper
660
mg/kg
2.6E-05
(mg/kg/day)
NA
(mg/kg/day)"
2.6E-04
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.0066
Iron
19200
mg/kg
7.7E-04
(mg/kg/day)
NA
(mg/kg/day)"
7.7E-03
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.011
Lead
71.4
mg/kg
2.9E-06
(mg/kg/day)
NA
(mg/kg/day)"
2.9E-05
(mg/kg/day)
NA
(mg/kg/day)
Manganese
388
mg/kg
1.6E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.6E-04
(mg/kg/day)
2.4E-02
(mg/kg/day)
0.0065
Thallium
2.13
mg/kg
8.5E-08
(mg/kg/day)
NA
(mg/kg/day)"
8.5E-07
(mg/kg/day)
1.0E-05
(mg/kg/day)
0.085
Vanadium
23.6
mg/kg
9.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
9.5E-06
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.0019
Zinc
380
mg/kg
1.5E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.5E-04
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.00051
Exp. Route Total
2.3E-07
0.14
Dermal
Benzo(a)pyrene
0.252
mg/kg
2.5E-09
(mg/kg/day)
1.0E+00
(mg/kg/day)"
2.5E-09
1.6E-08
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.000053
Naphthalene
9.8
mg/kg
6.2E-08
(mg/kg/day)
NA
(mg/kg/day)"
6.2E-07
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.000031
Dieldrin
0.11
mg/kg
5.3E-10
(mg/kg/day)
1.6E+01
(mg/kg/day)"
8.5E-09
5.3E-09
(mg/kg/day)
5.0E-05
(mg/kg/day)
0.00011
Aluminum
9940
mg/kg
4.8E-06
(mg/kg/day)
NA
(mg/kg/day)"
4.8E-05
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.000048
Antimony
6.48
mg/kg
3.1E-09
(mg/kg/day)
NA
(mg/kg/day)"
3.1E-08
(mg/kg/day)
6.0E-05
(mg/kg/day)
0.00052
Arsenic
3.95
mg/kg
5.7E-09
(mg/kg/day)
1.5E+00
(mg/kg/day)"
8.6E-09
5.7E-08
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00019
Cobalt
6.32
mg/kg
3.1E-09
(mg/kg/day)
NA
(mg/kg/day)"
3.1E-08
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.00010
Copper
660
mg/kg
3.2E-07
(mg/kg/day)
NA
(mg/kg/day)"
3.2E-06
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.000080
Iron
19200
mg/kg
9.3E-06
(mg/kg/day)
NA
(mg/kg/day)"
9.3E-05
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.00013
Lead
71.4
mg/kg
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)"
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)
Manganese
388
mg/kg
1.9E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.9E-06
(mg/kg/day)
9.6E-04
(mg/kg/day)
0.0020
Thallium
2.13
mg/kg
1.0E-09
(mg/kg/day)
NA
(mg/kg/day)"
1.0E-08
(mg/kg/day)
1.0E-05
(mg/kg/day)
0.0010
Vanadium
23.6
mg/kg
1.1E-08
(mg/kg/day)
NA
(mg/kg/day)"
1.1E-07
(mg/kg/day)
1.3E-04
(mg/kg/day)
0.00088
Zinc
380
mg/kg
1.8E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.8E-06
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.0000061
Exp. Route Total
2.0E-08
0.0051
Exposure Point Total
2.5E-07
0.14
Exposure Medium Total
2.5E-07
0.14
Air
OWR
Inhalation
Benzo(a)pyrene
7.8E-11
mg/m3
7.8E-12
(mg/m3)
6.0E-04
(ug/m3)"1
4.7E-12
5.0E-11
(mg/m3)
2.0E-06
(mg/m3)
0.000025
Naphthalene
1.7E-04
mg/m3
1.1E-05
(mg/m3)
3.4E-05
(ug/m3)"1
3.6E-07
1.1E-04
(mg/m3)
3.0E-03
(mg/m3)
0.035
Dieldrin
3.4E-11
mg/m3
2.2E-12
(mg/m3)
4.6E-03
(ug/m3)"1
1.0E-11
2.2E-11
(mg/m3)
NA
(mg/m3)
Aluminum
3.1E-06
mg/m3
2.0E-07
(mg/m3)
NA
(ug/m3)"1
2.0E-06
(mg/m3)
5.0E-03
(mg/m3)
0.00039
Antimony
2.0E-09
mg/m3
1.3E-10
(mg/m3)
NA
(ug/m3)"1
1.3E-09
(mg/m3)
NA
(mg/m3)
Arsenic
1.2E-09
mg/m3
7.8E-11
(mg/m3)
4.3E-03
(ug/m3)"1
3.4E-10
7.8E-10
(mg/m3)
1.5E-05
(mg/m3)
0.000052
Cobalt
2.0E-09
mg/m3
1.3E-10
(mg/m3)
9.0E-03
(ug/m3)"1
1.1E-09
1.3E-09
(mg/m3)
6.0E-06
(mg/m3)
0.00021
Copper
2.0E-07
mg/m3
1.3E-08
(mg/m3)
NA
(ug/m3)"1
1.3E-07
(mg/m3)
NA
(mg/m3)
Iron
5.9E-06
mg/m3
3.8E-07
(mg/m3)
NA
(ug/m3)"1
3.8E-06
(mg/m3)
NA
(mg/m3)
Lead
2.2E-08
mg/m3
1.4E-09
(mg/m3)
NA
(ug/m3)"1
1.4E-08
(mg/m3)
NA
(mg/m3)
Manganese
1.2E-07
mg/m3
7.7E-09
(mg/m3)
NA
(ug/m3)"1
7.7E-08
(mg/m3)
5.0E-05
(mg/m3)
0.0015
Thallium
6.6E-10
mg/m3
4.2E-11
(mg/m3)
NA
(ug/m3)"1
4.2E-10
(mg/m3)
NA
(mg/m3)
Vanadium
7.3E-09
mg/m3
4.7E-10
(mg/m3)
NA
(ug/m3)"1
4.7E-09
(mg/m3)
1.0E-04
(mg/m3)
0.000047
Zinc
1.2E-07
mg/m3
7.5E-09
(mg/m3)
NA
(ug/m3)"1
7.5E-08
(mg/m3)
NA
(mg/m3)
Exp. Route Total
3.6E-07
0.038
Exposure Point Total
3.6E-07
0.038
Exposure Medium Total
3.6E-07
0.038
Medium Total
6.1E-07
0.18
-------
TABLE 7.8.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 4
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Adult
Exposure Medium
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Ingestion
2-Butanone
1300
ug/L
1.6E-03
(mg/kg/day)
NA
(mg/kg/day)"
1.3E-02
(mg/kg/day)
6.0E-01
(mg/kg/day)
0.021
2-Hexanone
41
ug/L
5.1E-05
(mg/kg/day)
NA
(mg/kg/day)"
3.9E-04
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.079
Chloroform
9.4
ug/L
1.2E-05
(mg/kg/day)
3.1E-02
(mg/kg/day)"
3.6E-07
9.0E-05
(mg/kg/day)
1.0E-02
(mg/kg/day)
0.0090
cis-1,2-Dichloroethene
1.88
ug/L
2.3E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.8E-05
(mg/kg/day)
2.0E-03
(mg/kg/day)
0.0090
Methyl Tert-Butyl Ether
15
ug/L
1.9E-05
(mg/kg/day)
1.8E-03
(mg/kg/day)"
3.3E-08
1.4E-04
(mg/kg/day)
NA
(mg/kg/day)
Tetrachloroethene
65.7
ug/L
8.1E-05
(mg/kg/day)
2.1E-03
(mg/kg/day)"
1.7E-07
6.3E-04
(mg/kg/day)
6.0E-03
(mg/kg/day)
0.11
Trichloroethene (Mutagenic)
10.6
ug/L
1.9E-05
(mg/kg/day)
9.3E-03
(mg/kg/day)"
1.8E-07
1.0E-04
(mg/kg/day)
NA
(mg/kg/day)
Trichloroethene (Nonmutagenic
10.6
ug/L
1.3E-05
(mg/kg/day)
3.7E-02
(mg/kg/day)"
4.8E-07
1.0E-04
(mg/kg/day)
5.0E-04
(mg/kg/day)
0.20
Vinyl Chloride
0.57
ug/L
7.0E-07
(mg/kg/day)
7.2E-01
(mg/kg/day)"
5.1E-07
5.5E-06
(mg/kg/day)
3.0E-03
(mg/kg/day)
0.0018
1,4-Dioxane
3.84
ug/L
4.7E-06
(mg/kg/day)
1.0E-01
(mg/kg/day)"
4.7E-07
3.7E-05
(mg/kg/day)
3.0E-02
(mg/kg/day)
0.0012
Bis(2-ethylhexyl)phthalate
11
ug/L
1.4E-05
(mg/kg/day)
1.4E-02
(mg/kg/day)"
1.9E-07
1.1E-04
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.0053
Caprolactam
2800
ug/L
3.5E-03
(mg/kg/day)
NA
(mg/kg/day)"
2.7E-02
(mg/kg/day)
5.0E-01
(mg/kg/day)
0.054
Aluminum
57655
ug/L
7.1E-02
(mg/kg/day)
NA
(mg/kg/day)"
5.5E-01
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.55
Antimony
1.31
ug/L
1.6E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.3E-05
(mg/kg/day)
4.0E-04
(mg/kg/day)
0.031
Arsenic
12.8
ug/L
1.6E-05
(mg/kg/day)
1.5E+00
(mg/kg/day)"
2.4E-05
1.2E-04
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.41
Barium
674
ug/L
8.3E-04
(mg/kg/day)
NA
(mg/kg/day)"
6.5E-03
(mg/kg/day)
2.0E-01
(mg/kg/day)
0.032
Beryllium
3.46
ug/L
4.3E-06
(mg/kg/day)
NA
(mg/kg/day)"
3.3E-05
(mg/kg/day)
2.0E-03
(mg/kg/day)
0.017
Cadmium
0.424
ug/L
5.2E-07
(mg/kg/day)
NA
(mg/kg/day)"
4.1E-06
(mg/kg/day)
5.0E-04
(mg/kg/day)
0.0082
Cobalt
63.9
ug/L
7.9E-05
(mg/kg/day)
NA
(mg/kg/day)"
6.1E-04
(mg/kg/day)
3.0E-04
(mg/kg/day)
2.0
Copper
75.2
ug/L
9.3E-05
(mg/kg/day)
NA
(mg/kg/day)"
7.2E-04
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.018
Iron
45400
ug/L
5.6E-02
(mg/kg/day)
NA
(mg/kg/day)"
4.4E-01
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.62
Lead
23.1
ug/L
2.9E-05
(mg/kg/day)
NA
(mg/kg/day)"
2.2E-04
(mg/kg/day)
NA
(mg/kg/day)
Manganese
2525
ug/L
3.1E-03
(mg/kg/day)
NA
(mg/kg/day)"
2.4E-02
(mg/kg/day)
2.4E-02
(mg/kg/day)
1.01
Mercury
0.128
ug/L
1.6E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.2E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0041
Nickel
51.7
ug/L
6.4E-05
(mg/kg/day)
NA
(mg/kg/day)"
5.0E-04
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.025
Selenium
3.1
ug/L
3.8E-06
(mg/kg/day)
NA
(mg/kg/day)"
3.0E-05
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.0060
Thallium
0.539
ug/L
6.7E-07
(mg/kg/day)
NA
(mg/kg/day)"
5.2E-06
(mg/kg/day)
1.0E-05
(mg/kg/day)
0.52
Vanadium
12.3
ug/L
1.5E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.2E-04
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.024
Zinc
378
ug/L
4.7E-04
(mg/kg/day)
NA
(mg/kg/day)"
3.6E-03
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.012
Exp. Route Total
2.6E-05
5.8
Dermal
2-Butanone
1300
ug/L
1.6E-05
(mg/kg/day)
NA
(mg/kg/day)"
1.2E-04
(mg/kg/day)
6.0E-01
(mg/kg/day)
0.00021
2-Hexanone
41
ug/L
2.1E-06
(mg/kg/day)
NA
(mg/kg/day)"
1.7E-05
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.0033
Chloroform
9.4
ug/L
7.5E-07
(mg/kg/day)
3.1E-02
(mg/kg/day)"
2.3E-08
5.9E-06
(mg/kg/day)
1.0E-02
(mg/kg/day)
0.00059
cis-1,2-Dichloroethene
1.88
ug/L
2.0E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.5E-06
(mg/kg/day)
2.0E-03
(mg/kg/day)
0.0008
Methyl Tert-Butyl Ether
15
ug/L
3.2E-07
(mg/kg/day)
1.8E-03
(mg/kg/day)"
5.8E-10
2.5E-06
(mg/kg/day)
NA
(mg/kg/day)
Tetrachloroethene
65.7
ug/L
3.7E-05
(mg/kg/day)
2.1E-03
(mg/kg/day)"
7.7E-08
2.9E-04
(mg/kg/day)
6.0E-03
(mg/kg/day)
0.048
Trichloroethene (Mutagenic)
10.6
ug/L
2.3E-06
(mg/kg/day)
9.3E-03
(mg/kg/day)"
2.1E-08
1.2E-05
(mg/kg/day)
NA
(mg/kg/day)
Trichloroethene (Nonmutagenic
10.6
ug/L
1.6E-06
(mg/kg/day)
3.7E-02
(mg/kg/day)"
5.8E-08
1.2E-05
(mg/kg/day)
5.0E-04
(mg/kg/day)
0.024
Vinyl Chloride
0.57
ug/L
3.1E-08
(mg/kg/day)
7.2E-01
(mg/kg/day)"
2.2E-08
2.4E-07
(mg/kg/day)
3.0E-03
(mg/kg/day)
0.000080
1,4-Dioxane
3.84
ug/L
2.0E-08
(mg/kg/day)
1.0E-01
(mg/kg/day)"
2.0E-09
1.6E-07
(mg/kg/day)
3.0E-02
(mg/kg/day)
0.0000052
Bis(2-ethylhexyl)phthalate
11
ug/L
0.0E+00
(mg/kg/day)
1.4E-02
(mg/kg/day)"
0.0E+00
(mg/kg/day)
2.0E-02
(mg/kg/day)
Caprolactam
2800
ug/L
5.3E-05
(mg/kg/day)
NA
(mg/kg/day)"
4.1E-04
(mg/kg/day)
5.0E-01
(mg/kg/day)
0.00082
Aluminum
57655
ug/L
2.9E-04
(mg/kg/day)
NA
(mg/kg/day)"
2.3E-03
(mg/kg/day)
1.0E+00
(mg/kg/day)
0.0023
Antimony
1.31
ug/L
6.6E-09
(mg/kg/day)
NA
(mg/kg/day)"
5.2E-08
(mg/kg/day)
6.0E-05
(mg/kg/day)
0.00086
Arsenic
12.8
ug/L
6.5E-08
(mg/kg/day)
1.5E+00
(mg/kg/day)"
9.7E-08
5.0E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0017
Barium
674
ug/L
3.4E-06
(mg/kg/day)
NA
(mg/kg/day)"
2.7E-05
(mg/kg/day)
1.4E-02
(mg/kg/day)
0.0019
Beryllium
3.46
ug/L
1.8E-08
(mg/kg/day)
NA
(mg/kg/day)"
1.4E-07
(mg/kg/day)
1.4E-05
(mg/kg/day)
0.0097
Cadmium
0.424
ug/L
2.1E-09
(mg/kg/day)
NA
(mg/kg/day)"
1.7E-08
(mg/kg/day)
2.5E-05
(mg/kg/day)
0.00067
Cobalt
63.9
ug/L
1.3E-07
(mg/kg/day)
NA
(mg/kg/day)"
1.0E-06
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0034
Copper
75.2
ug/L
3.8E-07
(mg/kg/day)
NA
(mg/kg/day)"
3.0E-06
(mg/kg/day)
4.0E-02
(mg/kg/day)
0.000074
Iron
45400
ug/L
2.3E-04
(mg/kg/day)
NA
(mg/kg/day)"
1.8E-03
(mg/kg/day)
7.0E-01
(mg/kg/day)
0.0026
Lead
23.1
ug/L
1.2E-08
(mg/kg/day)
NA
(mg/kg/day)"
9.1E-08
(mg/kg/day)
NA
(mg/kg/day)
Manganese
2525
ug/L
1.3E-05
(mg/kg/day)
NA
(mq/kq/dav)
9.9E-05
(mg/kg/day)
9.6E-04
(mg/kg/day)
0.10
Groundwater
Groundwater
-------
TABLE 7.8.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 3 OF 4
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Adult
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Groundwater
Groundwater
OWRGC
Dermal
Mercury
0.128
ug/L
6.5E-10
(mg/kg/day)
NA
(mg/kg/day)"
5.0E-09
(mg/kg/day)
2.1E-05
(mg/kg/day)
0.00024
Nickel
51.7
ug/L
5.2E-08
(mg/kg/day)
NA
(mg/kg/day)"
4.1E-07
(mg/kg/day)
8.0E-04
(mg/kg/day)
0.00051
Selenium
3.1
ug/L
1.6E-08
(mg/kg/day)
NA
(mg/kg/day)"
1.2E-07
(mg/kg/day)
5.0E-03
(mg/kg/day)
0.000024
Thallium
0.539
ug/L
2.7E-09
(mg/kg/day)
NA
(mg/kg/day)"
2.1E-08
(mg/kg/day)
1.0E-05
(mg/kg/day)
0.0021
Vanadium
12.3
ug/L
6.2E-08
(mg/kg/day)
NA
(mg/kg/day)"
4.8E-07
(mg/kg/day)
1.3E-04
(mg/kg/day)
0.0037
Zinc
378
ug/L
1.1E-06
(mg/kg/day)
NA
(mg/kg/day)"
8.9E-06
(mg/kg/day)
3.0E-01
(mg/kg/day)
0.000030
Exp. Route Total
3.0E-07
0.21
Exposure Point Total
2.6E-05
6.0
Exposure Medium Total
2.6E-05
6.0
Air
OWR
Inhalation
2-Butanone
1.7E-02
mg/m3
1.4E-03
(mg/m3)
NA
(ug/m3)"1
1.1E-02
(mg/m3)
5.0E+00
(mg/m3)
0.0022
2-Hexanone
6.5E-04
mg/m3
5.4E-05
(mg/m3)
NA
(ug/m3)"1
4.2E-04
(mg/m3)
3.0E-02
(mg/m3)
0.014
Chloroform
4.0E-04
mg/m3
3.3E-05
(mg/m3)
2.3E-05
(ug/m3)"1
7.6E-07
2.6E-04
(mg/m3)
9.8E-02
(mg/m3)
0.0026
cis-1,2-Dichloroethene
8.7E-05
mg/m3
7.1E-06
(mg/m3)
NA
(ug/m3)"1
5.6E-05
(mg/m3)
NA
(mg/m3)
Methyl Tert-Butyl Ether
5.7E-04
mg/m3
4.7E-05
(mg/m3)
2.6E-07
(ug/m3)"1
1.2E-08
3.7E-04
(mg/m3)
3.0E+00
(mg/m3)
0.00012
Tetrachloroethene
2.6E-03
mg/m3
2.1E-04
(mg/m3)
2.6E-07
(ug/m3)"1
5.5E-08
1.6E-03
(mg/m3)
4.0E-02
(mg/m3)
0.041
Trichloroethene (Mutagenic)
4.5E-04
mg/m3
5.3E-05
(mg/m3)
1.0E-06
(ug/m3)"1
5.3E-08
2.9E-04
(mg/m3)
NA
(mg/m3)
Trichloroethene (Nonmutagenic
4.5E-04
mg/m3
3.7E-05
(mg/m3)
3.1E-06
(ug/m3)"1
1.1E-07
2.9E-04
(mg/m3)
2.0E-03
(mg/m3)
0.14
Vinyl Chloride
3.2E-05
mg/m3
2.6E-06
(mg/m3)
4.4E-06
(ug/m3)"1
1.2E-08
2.0E-05
(mg/m3)
1.0E-01
(mg/m3)
0.00020
1,4-Dioxane
4.8E-06
mg/m3
4.0E-07
(mg/m3)
5.0E-06
(ug/m3)"1
2.0E-09
3.1E-06
(mg/m3)
3.0E-02
(mg/m3)
0.00010
Bis(2-ethylhexyl)phthalate
0.0E+00
mg/m3
0.0E+00
(mg/m3)
2.4E-06
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Caprolactam
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
2.2E-03
(mg/m3)
Aluminum
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
5.0E-03
(mg/m3)
Antimony
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Arsenic
0.0E+00
mg/m3
0.0E+00
(mg/m3)
4.3E-03
(ug/m3)"1
0.0E+00
(mg/m3)
1.5E-05
(mg/m3)
Barium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
5.0E-04
(mg/m3)
Beryllium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
2.4E-03
(ug/m3)"1
0.0E+00
(mg/m3)
2.0E-05
(mg/m3)
Cadmium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
1.8E-03
(ug/m3)"1
0.0E+00
(mg/m3)
1.0E-05
(mg/m3)
Cobalt
0.0E+00
mg/m3
0.0E+00
(mg/m3)
9.0E-03
(ug/m3)"1
0.0E+00
(mg/m3)
6.0E-06
(mg/m3)
Copper
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Iron
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Lead
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Manganese
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
5.0E-05
(mg/m3)
Mercury
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
3.0E-04
(mg/m3)
Nickel
0.0E+00
mg/m3
0.0E+00
(mg/m3)
2.6E-04
(ug/m3)"1
0.0E+00
(mg/m3)
9.0E-05
(mg/m3)
Selenium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
2.0E-02
(mg/m3)
Thallium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Vanadium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
1.0E-04
(mg/m3)
Zinc
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
0.0E+00
(mg/m3)
NA
(mg/m3)
Exp. Route Total
1.0E-06
0.20
Exposure Point Total
1.0E-06
0.20
Exposure Medium Total
1.0E-06
0.20
Medium Total
2.7E-05
6.2
-------
TABLE 7.8.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 4 OF 4
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Adult
Medium
Exposure Medium
Exposure Point
Exposure Route Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
|
Value
Units
Value
Units
Value
Units
Value
Units
Sediment
Sediment
OWR
Ingestion Cobalt
14
mg/kg
6.2E-08
(mg/kg/day)
NA
(mg/kg/day)"1
6.2E-07
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0021
[Nickel
1500
mg/kg
6.7E-06
(mg/kg/day)
NA
(mg/kg/day)"1
6.7E-05
(mg/kg/day)
2.0E-02
(mg/kg/day)
0.0033
I Exp. Route Total |
0.0054
Dermal jCobalt
14
mg/kg
7.5E-10
(mg/kg/day)
NA
(mg/kg/day)"1
7.5E-09
(mg/kg/day)
3.0E-04
(mg/kg/day)
0.0000
| Nickel
1500
mg/kg
8.1E-08
(mg/kg/day)
NA
(mg/kg/day)"1
8.1E-07
(mg/kg/day)
8.0E-04
(mg/kg/day)
0.0010
Exp. Route Total jj
0.0010
Exposure Point Total
0.006
Exposure Medium Total
0.006
Medium Total
0.006
Total of Receptor Risks Across All Media
2.8E-05
Total of Receptor Hazards Across All Media
6.4
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 7.9.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 4
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Ingestion
Benzo(a)pyrene
0.252
mg/kg
2.2E-07
(mg/kg/day)
1.0E+00
(mg/kg/day)"
2.2E-07
Naphthalene
9.8
mg/kg
1.6E-06
(mg/kg/day)
NA
(mg/kg/day)"
Dieldrin
0.11
mg/kg
1.8E-08
(mg/kg/day)
1.6E+01
(mg/kg/day)"
2.9E-07
Aluminum
9940
mg/kg
1.6E-03
(mg/kg/day)
NA
(mg/kg/day)"
Antimony
6.48
mg/kg
1.1E-06
(mg/kg/day)
NA
(mg/kg/day)"
Arsenic
3.95
mg/kg
3.8E-07
(mg/kg/day)
1.5E+00
(mg/kg/day)"
5.8E-07
Cobalt
6.32
mg/kg
1.0E-06
(mg/kg/day)
NA
(mg/kg/day)"
Copper
660
mg/kg
1.1E-04
(mg/kg/day)
NA
(mg/kg/day)"
Iron
19200
mg/kg
3.1E-03
(mg/kg/day)
NA
(mg/kg/day)"
Lead
71.4
mg/kg
1.2E-05
(mg/kg/day)
NA
(mg/kg/day)"
Manganese
388
mg/kg
6.3E-05
(mg/kg/day)
NA
(mg/kg/day)"
Thallium
2.13
mg/kg
3.5E-07
(mg/kg/day)
NA
(mg/kg/day)"
Vanadium
23.6
mg/kg
3.8E-06
(mg/kg/day)
NA
(mg/kg/day)"
Zinc
380
mg/kg
6.2E-05
(mg/kg/day)
NA
(mg/kg/day)"
Exp. Route Total
1.1E-06
Dermal
Benzo(a)pyrene
0.252
mg/kg
2.7E-08
(mg/kg/day)
1.0E+00
(mg/kg/day)"
2.7E-08
Naphthalene
9.8
mg/kg
2.1E-07
(mg/kg/day)
NA
(mg/kg/day)"
Dieldrin
0.11
mg/kg
1.8E-09
(mg/kg/day)
1.6E+01
(mg/kg/day)"
2.9E-08
Aluminum
9940
mg/kg
1.6E-05
(mg/kg/day)
NA
(mg/kg/day)"
Antimony
6.48
mg/kg
1.1E-08
(mg/kg/day)
NA
(mg/kg/day)"
Arsenic
3.95
mg/kg
1.9E-08
(mg/kg/day)
1.5E+00
(mg/kg/day)"
2.9E-08
Cobalt
6.32
mg/kg
1.0E-08
(mg/kg/day)
NA
(mg/kg/day)"
Copper
660
mg/kg
1.1E-06
(mg/kg/day)
NA
(mg/kg/day)"
Iron
19200
mg/kg
3.2E-05
(mg/kg/day)
NA
(mg/kg/day)"
Lead
71.4
mg/kg
0.0E+00
(mg/kg/day)
NA
(mg/kg/day)"
Manganese
388
mg/kg
6.4E-07
(mg/kg/day)
NA
(mg/kg/day)"
Thallium
2.13
mg/kg
3.5E-09
(mg/kg/day)
NA
(mg/kg/day)"
Vanadium
23.6
mg/kg
3.9E-08
(mg/kg/day)
NA
(mg/kg/day)"
Zinc
380
mg/kg
6.2E-07
(mg/kg/day)
NA
(mg/kg/day)"
Exp. Route Total
8.5E-08
Exposure Point Total
1.2E-06
Exposure Medium Total
1.2E-06
Air
OWR
Inhalation
Benzo(a)pyrene
7.8E-11
mg/m3
1.7E-11
(mg/m3)
6.0E-04
(ug/m3)"1
1.0E-11
Naphthalene
1.7E-04
mg/m3
1.4E-05
(mg/m3)
3.4E-05
(ug/m3)"1
4.6E-07
Dieldrin
3.4E-11
mg/m3
2.8E-12
(mg/m3)
4.6E-03
(ug/m3)"1
1.3E-11
Aluminum
3.1E-06
mg/m3
2.5E-07
(mg/m3)
NA
(ug/m3)"1
Antimony
2.0E-09
mg/m3
1.6E-10
(mg/m3)
NA
(ug/m3)"1
Arsenic
1.2E-09
mg/m3
1.0E-10
(mg/m3)
4.3E-03
(ug/m3)"1
4.3E-10
Cobalt
2.0E-09
mg/m3
1.6E-10
(mg/m3)
9.0E-03
(ug/m3)"1
1.4E-09
Copper
2.0E-07
mg/m3
1.7E-08
(mg/m3)
NA
(ug/m3)"1
Iron
5.9E-06
mg/m3
4.9E-07
(mg/m3)
NA
(ug/m3)"1
Lead
2.2E-08
mg/m3
1.8E-09
(mg/m3)
NA
(ug/m3)"1
Manganese
1.2E-07
mg/m3
9.9E-09
(mg/m3)
NA
(ug/m3)"1
Thallium
6.6E-10
mg/m3
5.4E-11
(mg/m3)
NA
(ug/m3)"1
Vanadium
7.3E-09
mg/m3
6.0E-10
(mg/m3)
NA
(ug/m3)"1
Zinc
1.2E-07
mg/m3
9.7E-09
(mg/m3)
NA
(ug/m3)"1
Exp. Route Total
4.6E-07
Exposure Point Total
4.6E-07
Exposure Medium Total
4.6E-07
Medium Total
1.6E-06
-------
TABLE 7.9.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 4
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Exposure Medium
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Ingestion
2-Butanone
2-Hexanone
1300
41
ug/L
ug/L
2.7E-03
8.4E-05
(mg/kg/day)
(mg/kg/day)
NA
NA
(mg/kg/day)"
(mg/kg/day)"
Chloroform
9.4
ug/L
1.9E-05
(mg/kg/day)
3.1E-02
(mg/kg/day)"
6.0E-07
cis-1,2-Dichloroethene
1.88
ug/L
3.9E-06
(mg/kg/day)
NA
(mg/kg/day)"
Methyl Tert-Butyl Ether
15
ug/L
3.1E-05
(mg/kg/day)
1.8E-03
(mg/kg/day)"
5.6E-08
Tetrachloroethene
65.7
ug/L
1.4E-04
(mg/kg/day)
2.1E-03
(mg/kg/day)"
2.8E-07
Trichloroethene (Mutagenic)
10.6
ug/L
8.6E-05
(mg/kg/day)
9.3E-03
(mg/kg/day)"
8.0E-07
Trichloroethene (Nonmutagenic
10.6
ug/L
2.2E-05
(mg/kg/day)
3.7E-02
(mg/kg/day)"
8.1E-07
Vinyl Chloride
0.57
ug/L
1.8E-05
(mg/kg/day)
7.2E-01
(mg/kg/day)"
1.3E-05
1,4-Dioxane
3.84
ug/L
7.9E-06
(mg/kg/day)
1.0E-01
(mg/kg/day)"
7.9E-07
Bis(2-ethylhexyl)phthalate
11
ug/L
2.3E-05
(mg/kg/day)
1.4E-02
(mg/kg/day)"
3.2E-07
Caprolactam
2800
ug/L
5.8E-03
(mg/kg/day)
NA
(mg/kg/day)"
Aluminum
57655
ug/L
1.2E-01
(mg/kg/day)
NA
(mg/kg/day)"
Antimony
1.31
ug/L
2.7E-06
(mg/kg/day)
NA
(mg/kg/day)"
Arsenic
12.8
ug/L
2.6E-05
(mg/kg/day)
1.5E+00
(mg/kg/day)"
4.0E-05
Barium
674
ug/L
1.4E-03
(mg/kg/day)
NA
(mg/kg/day)"
Beryllium
3.46
ug/L
7.1E-06
(mg/kg/day)
NA
(mg/kg/day)"
Cadmium
0.424
ug/L
8.7E-07
(mg/kg/day)
NA
(mg/kg/day)"
Cobalt
63.9
ug/L
1.3E-04
(mg/kg/day)
NA
(mg/kg/day)"
Copper
75.2
ug/L
1.5E-04
(mg/kg/day)
NA
(mg/kg/day)"
Iron
45400
ug/L
9.4E-02
(mg/kg/day)
NA
(mg/kg/day)"
Lead
23.1
ug/L
4.8E-05
(mg/kg/day)
NA
(mg/kg/day)"
Manganese
2525
ug/L
5.2E-03
(mg/kg/day)
NA
(mg/kg/day)"
Mercury
0.128
ug/L
2.6E-07
(mg/kg/day)
NA
(mg/kg/day)"
Nickel
51.7
ug/L
1.1E-04
(mg/kg/day)
NA
(mg/kg/day)"
Selenium
3.1
ug/L
6.4E-06
(mg/kg/day)
NA
(mg/kg/day)"
Thallium
0.539
ug/L
1.1E-06
(mg/kg/day)
NA
(mg/kg/day)"
Vanadium
12.3
ug/L
2.5E-05
(mg/kg/day)
NA
(mg/kg/day)"
Zinc
378
ug/L
7.8E-04
(mg/kg/day)
NA
(mg/kg/day)"
Exp. Route Total
5.6E-05
Dermal
2-Butanone
2-Hexanone
1300
41
ug/L
ug/L
2.8E-05
3.8E-06
(mg/kg/day)
(mg/kg/day)
NA
NA
(mg/kg/day)"
(mg/kg/day)"
Chloroform
9.4
ug/L
1.6E-06
(mg/kg/day)
3.1E-02
(mg/kg/day)"
4.9E-08
cis-1,2-Dichloroethene
1.88
ug/L
4.3E-07
(mg/kg/day)
NA
(mg/kg/day)"
Methyl Tert-Butyl Ether
15
ug/L
6.6E-07
(mg/kg/day)
1.8E-03
(mg/kg/day)"
1.2E-09
Tetrachloroethene
65.7
ug/L
7.5E-05
(mg/kg/day)
2.1E-03
(mg/kg/day)"
1.6E-07
Trichloroethene (Mutagenic)
10.6
ug/L
1.5E-05
(mg/kg/day)
9.3E-03
(mg/kg/day)"
1.4E-07
Trichloroethene (Nonmutagenic
10.6
ug/L
3.3E-06
(mg/kg/day)
3.7E-02
(mg/kg/day)"
1.2E-07
Vinyl Chloride
0.57
ug/L
1.6E-06
(mg/kg/day)
7.2E-01
(mg/kg/day)"
1.2E-06
1,4-Dioxane
3.84
ug/L
3.4E-08
(mg/kg/day)
1.0E-01
(mg/kg/day)"
3.4E-09
Bis(2-ethylhexyl)phthalate
11
ug/L
0.0E+00
(mg/kg/day)
1.4E-02
(mg/kg/day)"
Caprolactam
2800
ug/L
8.8E-05
(mg/kg/day)
NA
(mg/kg/day)"
Aluminum
57655
ug/L
5.1E-04
(mg/kg/day)
NA
(mg/kg/day)"
Antimony
1.31
ug/L
1.2E-08
(mg/kg/day)
NA
(mg/kg/day)"
Arsenic
12.8
ug/L
1.1E-07
(mg/kg/day)
1.5E+00
(mg/kg/day)"
1.7E-07
Barium
674
ug/L
6.0E-06
(mg/kg/day)
NA
(mg/kg/day)"
Beryllium
3.46
ug/L
3.1E-08
(mg/kg/day)
NA
(mg/kg/day)"
Cadmium
0.424
ug/L
3.8E-09
(mg/kg/day)
NA
(mg/kg/day)"
Cobalt
63.9
ug/L
2.3E-07
(mg/kg/day)
NA
(mg/kg/day)"
Copper
75.2
ug/L
6.7E-07
(mg/kg/day)
NA
(mg/kg/day)"
Iron
45400
ug/L
4.0E-04
(mg/kg/day)
NA
(mg/kg/day)"
Lead
23.1
ug/L
2.1E-08
(mg/kg/day)
NA
(mg/kg/day)"
Manganese
2525
ug/L
2.2E-05
(mg/kg/day)
NA
(mq/kq/dav)
Groundwater
Groundwater
-------
TABLE 7.9.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 3 OF 4
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Medium
Exposure Medium
Exposure Point
Exposure Route
Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
Value
Units
Value
Units
Value
Units
Value
Units
Groundwater
Groundwater
OWRGC
Dermal
Mercury
0.128
ug/L
1.1E-09
(mg/kg/day)
NA
(mg/kg/day)"
Nickel
51.7
ug/L
9.2E-08
(mg/kg/day)
NA
(mg/kg/day)"
Selenium
3.1
ug/L
2.8E-08
(mg/kg/day)
NA
(mg/kg/day)"
Thallium
0.539
ug/L
4.8E-09
(mg/kg/day)
NA
(mg/kg/day)"
Vanadium
12.3
ug/L
1.1E-07
(mg/kg/day)
NA
(mg/kg/day)"
Zinc
378
ug/L
2.0E-06
(mg/kg/day)
NA
(mg/kg/day)"
Exp. Route Total
1.8E-06
Exposure Point Total
5.8E-05
Exposure Medium Total
5.8E-05
Air
OWR
Inhalation
2-Butanone
1.7E-02
mg/m3
1.4E-03
(mg/m3)
NA
(ug/m3)"1
2-Hexanone
6.5E-04
mg/m3
5.4E-05
(mg/m3)
NA
(ug/m3)"1
Chloroform
4.0E-04
mg/m3
3.3E-05
(mg/m3)
2.3E-05
(ug/m3)"1
7.6E-07
cis-1,2-Dichloroethene
8.7E-05
mg/m3
7.1E-06
(mg/m3)
NA
(ug/m3)"1
Methyl Tert-Butyl Ether
5.7E-04
mg/m3
4.7E-05
(mg/m3)
2.6E-07
(ug/m3)"1
1.2E-08
Tetrachloroethene
2.6E-03
mg/m3
2.1E-04
(mg/m3)
2.6E-07
(ug/m3)"1
5.5E-08
Trichloroethene (Mutagenic)
4.5E-04
mg/m3
5.3E-05
(mg/m3)
1.0E-06
(ug/m3)"1
5.3E-08
Trichloroethene (Nonmutagenic
4.5E-04
mg/m3
3.7E-05
(mg/m3)
3.1E-06
(ug/m3)"1
1.1E-07
Vinyl Chloride
3.2E-05
mg/m3
2.6E-06
(mg/m3)
4.4E-06
(ug/m3)"1
1.2E-08
1,4-Dioxane
4.8E-06
mg/m3
4.0E-07
(mg/m3)
5.0E-06
(ug/m3)"1
2.0E-09
Bis(2-ethylhexyl)phthalate
0.0E+00
mg/m3
0.0E+00
(mg/m3)
2.4E-06
(ug/m3)"1
Caprolactam
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Aluminum
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Antimony
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Arsenic
0.0E+00
mg/m3
0.0E+00
(mg/m3)
4.3E-03
(ug/m3)"1
Barium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Beryllium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
2.4E-03
(ug/m3)"1
Cadmium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
1.8E-03
(ug/m3)"1
Cobalt
0.0E+00
mg/m3
0.0E+00
(mg/m3)
9.0E-03
(ug/m3)"1
Copper
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Iron
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Lead
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Manganese
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Mercury
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Nickel
0.0E+00
mg/m3
0.0E+00
(mg/m3)
2.6E-04
(ug/m3)"1
Selenium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Thallium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Vanadium
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Zinc
0.0E+00
mg/m3
0.0E+00
(mg/m3)
NA
(ug/m3)"1
Exp. Route Total
1.0E-06
Exposure Point Total
1.0E-06
Exposure Medium Total
1.0E-06
Medium Total
5.9E-05
-------
TABLE 7.9.CTE
CALCULATION OF CHEMICAL CANCER RISKS AND NON-CANCER HAZARDS
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 4 OF 4
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Medium
Exposure Medium
Exposure Point
Exposure Route Chemical of
EPC
Cancer Risk Calculations
Non-Cancer Hazard Calculations
Potential Concern
Value
Units
Intake/Exposure Concentration
CSF/Unit Risk
Cancer Risk
Intake/Exposure Concentration
RfD/RfC
Hazard Quotient
|
Value
Units
Value
Units
Value
Units
Value
Units
Sediment
Sediment
OWR
Ingestion Cobalt
14
mg/kg
2.5E-07
(mg/kg/day)
NA
(mg/kg/day)"1
[Nickel
1500
mg/kg
2.7E-05
(mg/kg/day)
NA
(mg/kg/day)"1
I Exp. Route Total |
Dermal jCobalt
14
mg/kg
2.6E-09
(mg/kg/day)
NA
(mg/kg/day)"1
| Nickel
1500
mg/kg
2.7E-07
(mg/kg/day)
NA
(mg/kg/day)"1
Exp. Route Total jj
Exposure Point Total
Exposure Medium Total
Medium Total
Total of Receptor Risks Across All Media
6.1E-05
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
RAGS Part D Table 8
Calculation of Radiation Cancer Risks
No tables, Radiation cancer risks were not evaluated for the Old Wilmington Road Site
-------
RAGS Part D Table 9
Summary of Receptor Risks and Hazards for COPCs
-------
LIST OF TABLES
RAGS PART D TABLE 9
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
Table No.
Reasonable Maximum Exposures
9 1 .RME Current Industrial Workers
9.2.RME Current Child Residents
9 3 RME Current Adult Residents
9 4 RME Current Lifelong Residents
9 5 RME Future Construction Workers
9 6 RME Future Industrial Workers
9 7 RME Future Child Residents
9 8 RME Future Adult Residents
9 9 RME Future Lifelong Residents
Central Tendency Exposures
9.1 CTE Current Industrial Workers
9 2 CTE Current Child Residents
9 3 CTE Current Adult Residents
9 4 CTE Current Lifelong Residents
9 5 CTE Future Construction Workers
9 6 CTE Future Industrial Workers
9 7 CTE Future Child Residents
9 8 CTE Future Adult Residents
9 9 CTE Future Lifelong Residents
-------
TABLE 9.1.RME
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Current
Receptor Population: Industrial Workers
Receptor Age: Adult
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
Routes Total
Target Organ(s)
Routes Total
Surface Soil
Surface Soil
OWR
Benzo(a)pyrene
8.7E-08
4.8E-08
1.4E-07
Developmental, Immune, Reproductive
0.00082
0.00045
0.0013
Naphthalene
Body Weight
0.00042
0.00023
0.00065
Dieldrin
5.4E-07
2.3E-07
7.7E-07
Hepatic
0.0019
0.00080
0.0027
Aluminum
Nervous
0.010
0.00043
0.011
Antimony
Hematologic
0.024
0.0068
0.031
Arsenic
1.5E-06
3.1E-07
1.8E-06
Dermal, CVS
0.0090
0.0019
0.011
Cobalt
Thyroid
0.022
0.00092
0.023
Copper
GS
0.027
0.0011
0.028
Iron
GS
0.025
0.0010
0.026
Lead
NA
Manganese
Nervous
0.016
0.017
0.033
Vanadium
Dermal
0.0046
»
0.0075
0.012
Zinc
Hematologic, Immune
0.0020
-
0.000085
0.0021
Chemical Total
2.1E-06
5.8E-07
2.7E-06
0.14
-
0.039
0.18
Exposure Point Total
2.7E-06
0.18
Exposure Medium Total
2.7E-06
0.18
Air
OWR
Benzo(a)pyrene
4.3E-12
4.3E-12
Developmental, Reproductive
0.000010
0.000010
Naphthalene
4.6E-07
4.6E-07
Nervous, Respiratory
0.013
0.013
Dieldrin
1.3E-11
1.3E-11
NA
Aluminum
Nervous
0.00017
0.00017
Antimony
NA
Arsenic
5.7E-10
5.7E-10
NA
0.000025
0.000025
Cobalt
1.7E-09
1.7E-09
Respiratory
0.000089
0.000089
Copper
NA
Iron
NA
Lead
NA
Manganese
Nervous
0.00064
0.00064
Vanadium
-
-
-
Respiratory
»
0.000019
»
0.000019
Zinc
-
-
-
NA
-
-
-
-
Chemical Total
-
4.6E-07
-
-
4.6E-07
0.014
0.014
Exposure Point Total
4.6E-07
0.014
Exposure Medium Total
4.6E-07
0.014
Vledium Total
3.1E-06
0.19
Receptor Total
Receptor Risk Total
3.1E-06
Receptor HI Total
0.19
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 9.2.RME
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Child
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
Routes Total
Target Organ(s)
Routes Total
Surface Soil
Surface Soil
OWR
Benzo(a)pyrene
1.7E-06
5.2E-07
2.2E-06
Developmental, Immune, Reproductive
0.012
0.0038
0.016
Naphthalene
Body Weight
0.0063
0.0019
0.0082
Dieldrin
1.9E-06
4.6E-07
2.4E-06
Hepatic
0.028
0.0067
0.035
Aluminum
Nervous
0.15
0.0036
0.16
Antimony
Hematologic
0.36
0.057
0.42
Arsenic
5.2E-06
6.2E-07
5.8E-06
Dermal, CVS
0.14
0.016
0.15
Cobalt
Thyroid
0.32
0.0077
0.33
Copper
GS
0.40
0.0094
0.41
Iron
GS
0.37
0.0088
0.38
Lead
NA
Manganese
Nervous
0.24
0.14
0.39
Vanadium
Dermal
0.069
»
0.063
0.13
Zinc
Hematologic, Immune
0.030
-
0.00071
0.031
Chemical Total
8.8E-06
1.6E-06
1.0E-05
2.1
-
0.32
2.4
Exposure Point Total
1.0E-05
2.4
Exposure Medium Total
1.0E-05
2.4
Air
OWR
Benzo(a)pyrene
2.3E-11
2.3E-11
Developmental, Reproductive
0.000042
0.000042
Naphthalene
4.6E-07
4.6E-07
Nervous, Respiratory
0.053
0.053
Dieldrin
1.3E-11
1.3E-11
NA
Aluminum
Nervous
0.00071
0.00071
Antimony
NA
Arsenic
5.8E-10
5.8E-10
NA
0.00010
0.00010
Cobalt
1.7E-09
1.7E-09
Respiratory
0.00037
0.00037
Copper
NA
Iron
NA
Lead
NA
Manganese
Nervous
0.0027
0.0027
Vanadium
Respiratory
0.000080
»
0.000080
Zinc
NA
-
-
-
Chemical Total
4.6E-07
4.6E-07
0.057
0.057
Exposure Point Total
4.6E-07
0.057
Exposure Medium Total
4.6E-07
0.057
Vledium Total
1.1E-05
2.5
Sediment
Sediment
OWR
Cobalt
Thyroid
0.09
-
0.00
0.09
Nickel
Body Weight
0.14
-
0.085
0.23
Chemical Total
0.23
-
0.09
0.32
Exposure Point Total
0.32
Exposure Medium Total
0.32
Vledium Total
0.32
Receptor Total
Receptor Risk Total
1.1E-05
Receptor HI Total
2.8
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
Total Body Weight HI
0.2
Total CVS HI
0.2
Total Dermal HI
0.3
Total Developmental HI
0.02
Total GS HI
0.8
Total Hematologic HI
0.4
Total Hepatic HI
0.03
Total Immune HI
0.05
Total Nervous HI
0.6
Total Reproductive HI
0.02
Total Respiratory HI
0.05
Total Thyroid HI
0.4
-------
TABLE 9.3.RME
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Adult
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
Routes Total
Target Organ(s)
Routes Total
Surface Soil
Surface Soil
OWR
Benzo(a)pyrene
2.0E-07
1.1E-07
3.0E-07
Developmental, Immune, Reproductive
0.0011
0.00063
0.0018
Naphthalene
Body Weight
0.00059
0.00032
0.00091
Dieldrin
6.0E-07
2.5E-07
8.6E-07
Hepatic
0.0026
0.0011
0.0038
Aluminum
Nervous
0.014
0.00061
0.015
Antimony
Hematologic
0.034
0.0095
0.043
Arsenic
1.6E-06
3.4E-07
2.0E-06
Dermal, CVS
0.013
0.0027
0.015
Cobalt
Thyroid
0.030
0.0013
0.032
Copper
GS
0.037
0.0016
0.039
Iron
GS
0.035
0.0015
0.036
Lead
NA
Manganese
Nervous
0.023
0.024
0.047
Vanadium
Dermal
0.0065
»
0.011
0.017
Zinc
Hematologic, Immune
0.0028
-
0.00012
0.0029
Chemical Total
2.4E-06
7.1E-07
3.1E-06
0.20
-
0.054
0.25
Exposure Point Total
3.1E-06
0.25
Exposure Medium Total
3.1E-06
0.25
Air
OWR
Benzo(a)pyrene
2.9E-11
2.9E-11
Developmental, Reproductive
0.000042
0.000042
Naphthalene
1.5E-06
1.5E-06
Nervous, Respiratory
0.053
0.053
Dieldrin
4.3E-11
4.3E-11
NA
Aluminum
Nervous
0.00071
0.00071
Antimony
NA
Arsenic
1.9E-09
1.9E-09
NA
0.00010
0.00010
Cobalt
5.8E-09
5.8E-09
Respiratory
0.00037
0.00037
Copper
NA
Iron
NA
Lead
NA
Manganese
Nervous
0.0027
0.0027
Vanadium
Respiratory
0.000080
»
0.000080
Zinc
NA
-
-
-
Chemical Total
1.5E-06
1.5E-06
0.057
0.057
Exposure Point Total
1.5E-06
0.057
Exposure Medium Total
1.5E-06
0.057
Vledium Total
4.7E-06
0.31
Sediment
Sediment
OWR
Cobalt
Thyroid
0.008
-
0.000
0.009
Nickel
Body Weight
0.013
-
0.014
0.027
Chemical Total
0.022
0.014
0.036
Exposure Point Total
0.036
Exposure Medium Total
0.036
Vledium Total
0.036
Receptor Total
Receptor Risk Total
4.7E-06
Receptor HI Total
0.35
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 9.4.RME
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Medium
Exposure
Medium
Exposure
Point
Chemical
of Potential
Concern
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Ingestion
Inhalation
Dermal
External
(Radiation)
Exposure
Routes Total
Primary
Target Organ(s)
Ingestion
Inhalation
Dermal
Exposure
Routes Total
Surface Soil
Surface Soil
OWR
Benzo(a)pyrene
Naphthalene
Dieldrin
Aluminum
Antimony
Arsenic
Cobalt
Copper
Iron
Lead
Manganese
Vanadium
Zinc
1.9E-06
2.5E-06
6.8E-06
6.2E-07
7.1E-07
9.6E-07
2.5E-06
3.2E-06
7.8E-06
See Tables 9.2.RME and 9.3.RME for h
azard Indices
Chemical Total
1.1E-05
2.3E-06
1.4E-05
Exposure Point Total
1.4E-05
Exposure Medium Total
1.4E-05
Air
OWR
Benzo(a)pyrene
Naphthalene
Dieldrin
Aluminum
Antimony
Arsenic
Cobalt
Copper
Iron
Lead
Manganese
Vanadium
Zinc
5.2E-11
2.0E-06
5.6E-11
2.5E-09
7.5E-09
5.2E-11
2.0E-06
5.6E-11
2.5E-09
7.5E-09
Chemical Total
-
2.0E-06
-
-
2.0E-06
Exposure Point Total
2.0E-06
Exposure Medium Total
2.0E-06
Medium Total
1.6E-05
Sediment
Sediment
OWR
Cobalt
Nickel
"
|chemical Total
-
-
Exposure Point Total
| Exposure Medium Total
Medium Total
Receptor Total
Receptor Risk Total
1.6E-05
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 9.5.RME
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 2
Scenario Timeframe: Future
Receptor Population: Construction Workers
Receptor Age: Adult
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
Routes Total
Taraet Oraan(s)
Routes Total
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Benzo(a)pyrene
1.0E-08
4.2E-09
1.4E-08
Developmental, Immune, Reproductive
0.0024
0.00099
0.0034
Naphthalene
Nervous
0.000046
0.000019
0.000065
Dieldrin
7.1E-08
2.3E-08
9.4E-08
Hepatic
0.0031
0.0010
0.0041
Aluminum
Nervous
0.028
0.00090
0.029
Antimony
Hem atologic
0.046
0.0098
0.056
Arsenic
1.4E-07
2.3E-08
1.7E-07
Dermal, CVS
0.022
0.0036
0.026
Cobalt
Thyroid
0.0060
0.00019
0.0061
Copper
GS
0.047
0.0015
0.048
Iron
GS
0.077
0.0025
0.080
Lead
NA
Manganese
Nervous
0.046
0.037
0.082
Thallium
Dermal
0.15
0.0048
0.16
Vanadium
-
Urinary
0.0067
0.0082
0.015
Zinc
-
Hematologic
0.0036
0.00011
0.0037
Chemical Total
2.2E-07
5.0E-08
-
2.7E-07
0.44
-
0.070
0.51
Exposure Point Total
2.7E-07
0.51
Exposure Me
dium Total
2.7E-07
0.51
Air
OWR
Benzo(a)pyrene
3.5E-10
3.5E-10
Developmental, Reproductive
-
0.021
0.021
Naphthalene
1.1E-07
1.1E-07
Nervous, Respiratory
-
0.073
0.073
Dieldrin
1.2E-09
1.2E-09
NA
Aluminum
Nervous
0.32
0.32
Antimony
NA
Arsenic
4.0E-08
4.0E-08
NA
0.043
0.043
Cobalt
1.3E-07
1.3E-07
Respiratory
0.052
0.052
Copper
NA
Iron
NA
Lead
NA
Manganese
Nervous
1.3
1.3
Thallium
NA
Vanadium
-
Respiratory
-
0.038
-
0.038
Zinc
-
NA
-
-
-
Chemical Total
-
2.8E-07
-
-
2.8E-07
1.8
1.8
Exposure Point Total
2.8E-07
1.8
Exposure Me
dium Total
2.8E-07
1.8
Vledium Total
5.5E-07
2.3
Groundwater
Groundwater
OWR
2-Butanone
-
-
Developmental
5.1E-8
-
3.0E-8
8.1E-8
cis-1,2-Dichloroethene
-
-
Urinary
0.0000080
-
0.000052
0.000060
Methyl tert-butyl ether
1.3E-12
1.6E-12
2.9E-12
NA
Trichloroethene
9.1E-10
6.6E-09
7.5E-09
Immune, Developmental
0.0028
0.020
0.023
1,4-Dioxane
2.8E-10
5.6E-11
3.4E-10
Hepatic
0.00000039
7.9E-8
0.00000047
Caprolactam
Urinary
0.00000038
0.00000024
0.00000062
Aluminum
Nervous
0.0059
0.0033
0.0092
Antimony
Hem atologic
0.000059
0.00022
0.00028
Arsenic
6.6E-08
3.7E-08
1.0E-07
Dermal, CVS
0.010
0.0058
0.016
Barium
Urinary
0.00085
0.0069
0.0077
Beryllium
None Reported
0.00018
0.015
0.015
Cadmium
Urinary
0.000046
0.00052
0.00057
Cobalt
Thyroid
0.00021
0.000047
0.00026
Copper
GS
0.000051
0.000029
0.000080
Iron
GS
0.0055
0.0031
0.0086
Lead
NA
Manganese
Nervous
0.0022
0.031
0.033
Mercury
Nervous
0.0000023
0.000019
0.000021
Nickel
Body Weight
0.000041
0.00011
0.00016
Selenium
Body Weight
0.000016
0.0000093
0.000026
Thallium
Dermal
0.0030
0.0017
0.0046
Vanadium
Urinary
0.00016
0.0034
0.0036
Zinc
-
Hematologic
0.000059
0.000020
0.000079
Chemical Total
6.7E-08
4.4E-08
-
1.1E-07
0.031
0.09
0.12
Exposure Point Total
1.1E-07
0.12
Exposure Medium Total
1.1E-07
0.12
-------
TABLE 9.5.RME
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 2
Scenario Timeframe: Future
Receptor Population: Construction Workers
Receptor Age: Adult
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
Routes Total
Taraet Oraan(s)
Routes Total
Groundwater
Air
OWR
2-Butanone
Developmental
-
0.00026
0.00026
cis-1,2-Dichloroethene
NA
Methyl tert-butyl ether
7.8E-10
7.8E-10
Hepatic, Urinary, Ocular
0.000070
0.000070
Trichloroethene
3.1E-07
3.1E-07
Immune, Developmental
2.7
2.7
1,4-Dioxane
4.9E-09
4.9E-09
Respiratory
0.000095
0.000095
Caprolactam
Respiratory
Aluminum
Nervous
Antimony
NA
Arsenic
NA
Barium
Developmental
Beryllium
Immune, Respiratory
Cadmium
Urinary
Cobalt
Respiratory
Copper
NA
Iron
NA
Lead
NA
Manganese
Nervous
Mercury
Nervous
Nickel
Respiratory
Selenium
Respiratory
Thallium
NA
Vanadium
Respiratory
Zinc
NA
»
»
»
»
Chemical Total
3.2E-07
-
3.2E-07
2.7
2.7
Exposure Point Total
3.2E-07
2.7
Exposure Medium Total
3.2E-07
2.7
Vledium Total
4.3E-07
2.8
Receptor Total
Receptor Risk Total
9.9E-07
Receptor HI Total
5.1
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
Total Body Weight HI
Total CVS HI
Total Dermal HI
Total Developmental HI
Total GS HI
Total Hematologic HI
Total Hepatic HI
Total Immune HI
Total Nervous HI
Total None Reported HI
Total Reproductive HI
Total Respiratory HI
Total Thyroid HI
Total Urinary HI
Total Ocular HI
-------
TABLE 9.6.RME
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 3
Scenario Timeframe: Future
Receptor Population: Industrial Worker
Receptor Age: Adult
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
Routes Total
Target Organ(s)
Routes Total
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Benzo(a)pyrene
7.7E-08
-
4.2E-08
-
1.2E-07
Developmental, Immune, Reproductive
0.00072
0.00040
0.0011
Naphthalene
Body Weight
0.00042
0.00023
0.00065
Dieldrin
5.4E-07
2.3E-07
7.7E-07
Hepatic
0.0019
0.00080
0.0027
Aluminum
Nervous
0.009
0.00036
0.009
Antimony
Hematologic
0.014
0.0039
0.018
Arsenic
1.1E-06
2.3E-07
1.3E-06
Dermal, CVS
0.0068
0.0014
0.008
Cobalt
Thyroid
0.018
0.00076
0.019
Copper
GS
0.014
0.0006
0.015
Iron
GS
0.023
0.0010
0.024
Lead
NA
Manganese
Nervous
0.014
0.015
0.028
Thallium
--
-
-
Dermal
0.18
0.0077
0.19
Vanadium
--
-
-
Dermal
0.0040
0.0066
0.011
Zinc
-
-
Hematologic, Immune
0.0011
-
0.000046
0.0011
Chemical Total
1.7E-06
-
5.0E-07
-
2.2E-06
0.29
-
0.038
0.33
Exposure Point Total
2.2E-06
0.33
Exposure IV
edium Total
2.2E-06
0.33
Air
OWR
Benzo(a)pyrene
4E-12
4E-12
Developmental, Reproductive
0.000009
-
0.000009
Naphthalene
5E-07
5E-07
Nervous, Respiratory
0.013
-
0.013
Dieldrin
1E-11
1E-11
NA
Aluminum
Nervous
0.00014
0.00014
Antimony
NA
-
Arsenic
4E-10
4E-10
NA
0.000019
0.000019
Cobalt
1E-09
1E-09
Respiratory
0.000074
0.000074
Copper
NA
Iron
NA
Lead
NA
Manganese
Nervous
0.00055
0.00055
Thallium
NA
Vanadium
Respiratory
0.000017
0.000017
Zinc
-
NA
Chemical Total
4.6E-07
-
-
4.6E-07
0.013
0.013
Exposure Point Total
4.6E-07
0.013
Exposure Medium Total
4.6E-07
0.013
Vledium Total
2.7E-06
0.34
-------
TABLE 9.6.RME
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 3
Scenario Timeframe: Future
Receptor Population: Industrial Worker
Receptor Age: Adult
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
(Radiation)
Exposure
Routes Total
Primary
Target Organ(s)
Ingestion
Inhalation
Dermal
Exposure
Routes Total
Groundwater
Groundwater
OWR
2-Butanone
2-Hexanone
--
-
-
Developmental
Nervous
0.023
0.088
0.000039
0.00064
0.023
0.088
Chloroform
1.1E-06
1.2E-08
1.1E-06
Hepatic
0.010
0.00011
0.010
cis-1,2-Dichloroethene
Urinary
0.010
0.00015
0.010
Vlethyl Tert-Butyl Ether
1.0E-07
3.1E-10
1.0E-07
NA
Tetrachloroethene
5.3E-07
4.1E-08
5.7E-07
Nervous, Ocular
0.12
0.009
0.13
Trichloroethene
1.9E-06
3.8E-08
1.9E-06
Immune, Developmental
0.23
0.0047
0.23
Vinyl Chloride
1.6E-06
1.2E-08
1.6E-06
Hepatic
0.0020
0.000015
0.0020
1,4-Dioxane
1.5E-06
1.1E-09
1.5E-06
Hepatic, Urinary
0.0014
0.0000010
0.0014
Bis(2-ethylhexyl)phthalate
5.9E-07
5.9E-07
Hepatic
0.0059
0.0059
Caprolactam
Developmental
0.060
0.00016
0.060
Aluminum
Nervous
0.62
0.00044
0.62
Antimony
Hematologic
0.035
0.00016
0.035
Arsenic
7.3E-05
5.2E-08
7.3E-05
Dermal, CVS
0.46
0.00032
0.46
Barium
Urinary
0.036
0.00036
0.036
Beryllium
GS
0.019
0.0019
0.020
Cadmium
Urinary
0.0091
0.00013
0.0092
Cobalt
Thyroid
2.3
0.00064
2.3
Copper
GS
0.020
0.000014
0.020
Iron
GS
0.69
0.00049
0.69
Lead
NA
Vlanganese
Nervous
1.1
0.020
1.1
Vlercury
Immune, Urinary
0.0046
0.000046
0.0046
Mickel
Body Weight
0.028
0.000098
0.028
Selenium
Hematologic, Dermal, Nervous
0.0066
0.0000047
0.0066
Thallium
--
-
-
Dermal
0.58
0.00041
0.58
Vanadium
--
-
-
Dermal
0.026
0.00071
0.027
Zinc
--
-
-
Hematologic, Immune
0.013
0.0000057
0.013
Chemical Total
8.1E-05
-
1.6E-07
-
8.1E-05
6.5
0.040
6.5
Exposure Point Total
8.1E-05
6.5
Exposure Medium Total
8.1E-05
6.5
-------
TABLE 9.6.RME
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 3 OF 3
Scenario Timeframe: Future
Receptor Population: Industrial Worker
Receptor Age: Adult
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
Routes Total
Target Organ(s)
Routes Total
Groundwater
Air
OWR
2-Butanone
-
-
Developmental, Musculosketal
0.0023
0.0023
2-Hexanone
Nervous
0.015
0.015
Chloroform
2.2E-06
2.2E-06
Hepatic
0.0028
0.0028
cis-1,2-Dichloroethene
NA
Vlethyl Tert-Butyl Ether
3.6E-08
3.6E-08
Hepatic, Urinary, Ocular
0.00013
0.00013
Tetrachloroethene
1.6E-07
1.6E-07
Nervous, Ocular
0.044
0.044
Trichloroethene
4.5E-07
4.5E-07
Immune, Developmental
0.15
0.15
Vinyl Chloride
3.4E-08
3.4E-08
Hepatic
0.00022
0.00022
1,4-Dioxane
5.9E-09
5.9E-09
Nervous, Respiratory
0.00011
0.00011
Bis(2-ethylhexyl)phthalate
NA
Caprolactam
Respiratory
Aluminum
Nervous
Antimony
NA
Arsenic
NA
Barium
Developmental
Beryllium
Immune, Respiratory
Cadmium
Urinary
Cobalt
Respiratory
Copper
NA
Iron
NA
Lead
NA
Vlanganese
Nervous
Vlercury
Nervous
Mickel
Respiratory
Selenium
Respiratory
Thallium
-
-
NA
»
»
»
»
Vanadium
-
-
Respiratory
-
-
-
-
Zinc
-
-
NA
-
-
-
-
Chemical Total
2.9E-06
-
-
2.9E-06
0.22
0.22
Exposure Point Total
2.9E-06
0.22
Exposure Medium Total
2.9E-06
0.22
Vledium Total
8.4E-05
6.7
Receptor Total
Recep
or Risk Total
8.6E-05
Receptor HI Total
7.1
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
Total Body Weight HI
0.028
Total CVS HI
0.47
Total Dermal HI
1.3
Total Developmental HI
0.47
Total GS HI
0.77
Total Hematologic HI
0.074
Total Hepatic HI
0.025
Total Immune HI
0.41
Total Nervous HI
2.1
Total Respiratory HI
0.013
Total Thyroid HI
2.3
Total Urinary HI
0.062
Total Ocular HI
0.17
Total Reproductive HI
0.0011
-------
TABLE 9.7.RME
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 2
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Child
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
RoutesTotal
Target Organ(s)
Routes Total
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Benzo(a)pyrene
1.5E-06
-
4.5E-07
-
1.9E-06
Developmental, Immune, Reproductive
0.011
-
0.0033
0.014
Naphthalene
-
Body Weight
0.0063
0.0019
0.0082
Dieldrin
1.9E-06
4.6E-07
2.4E-06
Hepatic
0.028
-
0.0067
0.035
Aluminum
-
Nervous
0.13
0.0030
0.13
Antimony
-
-
Hematologic
0.21
0.033
0.24
Arsenic
3.9E-06
-
4.6E-07
4.4E-06
Dermal, CVS
0.10
-
0.012
0.11
Cobalt
Thyroid
0.27
0.0064
0.28
Copper
GS
0.21
0.0050
0.22
Iron
-
GS
0.35
0.0083
0.36
Lead
-
NA
-
Manganese
-
Nervous
0.21
0.12
0.33
Thallium
Dermal
2.7
0.065
2.8
Vanadium
--
-
-
Dermal
0.060
-
0.055
0.12
Zinc
--
-
Hematologic, Immune
0.016
0.00038
0.017
Chemical Total
7.3E-06
1.4E-06
-
8.7E-06
4.3
0.32
4.6
Exposure Point Total
8.7E-06
4.6
Exposure Medium Total
8.7E-06
4.6
Air
OWR
Benzo(a)pyrene
2.0E-11
-
2.0E-11
Developmental, Reproductive
0.000037
-
0.000037
Naphthalene
-
4.6E-07
-
-
4.6E-07
Nervous, Respiratory
-
0.053
-
0.053
Dieldrin
1.3E-11
1.3E-11
NA
-
-
-
-
Aluminum
-
Nervous
0.00059
-
0.00059
Antimony
-
-
-
NA
-
-
-
-
Arsenic
-
4.3E-10
-
-
4.3E-10
NA
0.000078
-
0.000078
Cobalt
1.4E-09
1.4E-09
Respiratory
-
0.00031
-
0.00031
Copper
-
-
-
NA
-
-
-
-
Iron
-
-
NA
-
Lead
-
-
-
NA
-
-
-
-
Manganese
-
-
-
Nervous
0.0023
0.0023
Thallium
-
-
-
NA
-
-
-
-
Vanadium
-
-
-
Respiratory
-
0.000070
-
0.000070
Zinc
-
-
-
NA
-
-
-
-
Chemical Total
-
4.6E-07
-
-
4.6E-07
0.056
0.056
Exposure Point Total
4.6E-07
0.056
Exposure Medium Total
4.6E-07
0.056
Medium Total
9.1E-06
4.7
-------
TABLE 9.7.RME
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 2
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Child
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
(Radiation)
Exposure
RoutesTotal
Primary
Tarqet Orqan(s)
Ingestion
Inhalation
Dermal
Exposure
Routes Total
Groundwater
Groundwater
OWR
2-Butanone
2-Hexanone
"
Developmental
Nervous
0.11
0.41
"
0.00089
0.015
0.11
0.42
Chloroform
1.2E-06
9.9E-08
1.3E-06
Hepatic
0.047
-
0.0037
0.051
cis-1,2-Dichloroethene
-
-
Urinary
0.047
0.0052
0.052
Methyl Tert-Butyl Ether
1.2E-07
-
2.3E-09
-
1.2E-07
NA
-
-
-
-
Tetrachloroethene
5.9E-07
-
3.1E-07
-
9.0E-07
Nervous, Ocular
0.55
-
0.29
0.83
Trichloroethene (Mutagenic)
2.2E-06
-
3.3E-07
-
2.6E-06
NA
-
-
-
-
Trichloroethene (Nonmutagenic)
1.7E-06
-
2.4E-07
1.9E-06
Immune, Developmental
1.1
-
0.15
1.2
Vinyl Chloride
2.3E-05
-
1.6E-06
-
2.5E-05
Hepatic
0.0095
-
0.00064
0.010
1,4-Dioxane
1.6E-06
-
5.2E-09
-
1.6E-06
Hepatic, Urinary
0.0064
-
0.000020
0.0064
Bis(2-ethylh exy I )phthalate
6.6E-07
-
-
6.6E-07
Hepatic
0.027
-
-
0.027
Caprolactam
-
Developmental
0.28
0.0031
0.28
Aluminum
-
Nervous
2.9
0.013
2.9
Antimony
-
-
Hematologic
0.16
0.0048
0.17
Arsenic
8.2E-05
-
3.6E-07
8.2E-05
Dermal, CVS
2.1
-
0.0094
2.1
Barium
-
-
Urinary
0.17
-
0.011
0.18
Beryllium
-
-
GS
0.086
-
0.054
0.14
Cadmium
-
-
Urinary
0.042
-
0.0037
0.046
Cobalt
-
-
Thyroid
10.6
-
0.019
11
Copper
-
-
GS
0.094
-
0.000413
0.094
Iron
-
-
GS
3.2
-
0.014
3.2
Lead
-
-
NA
-
-
-
-
Manganese
-
-
Nervous
5.2
-
0.58
5.8
Mercury
-
-
Immune, Urinary
0.021
-
0.0013
0.023
Nickel
-
-
Body Weight
0.13
-
0.0028
0.13
Selenium
-
-
Hematologic, Dermal, Nervous
0.031
-
0.00014
0.031
Thallium
-
-
Dermal
2.7
-
0.012
2.7
Vanadium
--
-
-
Dermal
0.12
-
0.021
0.14
Zinc
--
-
-
Hematologic, Immune
0.063
-
0.00017
0.063
Chemical Total
1.1E-04
-
2.9E-06
-
1.2E-04
30.2
-
1.2
31
Exposure Point Total
1.2E-04
31
Exposure to
edium Total
1.2E-04
31
Medium Total
1.2E-04
31
Sediment
Sediment
OWR
Cobalt
--
-
-
Thyroid
0.09
-
0.002
0.09
Nickel
--
-
-
Body Weight
0.14
-
0.085
0.23
Chemical Total
-
-
0.23
-
0.09
0.32
Exposure Point Total
0.32
Exposure to
edium Total
0.32
Medium Total
0.32
Receptor Total
Receptor Risk Total
1.3E-04
Receptor HI Total
36
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
Total Body Weight HI
Total CVS HI
Total Dermal HI
Total Developmental HI
Total GS HI
Total Hematologic HI
Total Hepatic HI
Total Immune HI
Total Nervous HI
Total Respiratory HI
Total Thyroid HI
Total Urinary HI
Total Ocular HI
Total Reproductive HI
-------
TABLE 9.8.RME
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 3
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
Routes Total
Target Organ(s)
Routes Total
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Benzo(a)pyrene
1.7E-07
-
9.5E-08
-
2.7E-07
Developmental, Immune, Reproductive
0.0010
0.00055
0.0016
Naphthalene
-
-
Body Weight
0.00059
0.00032
0.00091
Dieldrin
6.0E-07
-
2.5E-07
-
8.6E-07
Hepatic
0.0026
-
0.0011
0.0038
Aluminum
Nervous
0.012
0.00050
0.012
Antimony
-
-
Hematologic
0.019
0.0055
0.025
Arsenic
1.2E-06
-
2.6E-07
1.5E-06
Dermal, CVS
0.0095
-
0.0020
0.011
Cobalt
-
-
Thyroid
0.025
-
0.0011
0.026
Copper
GS
0.020
0.00084
0.021
Iron
GS
0.033
0.0014
0.034
Lead
-
-
NA
-
-
-
-
Manganese
-
-
Nervous
0.019
0.020
0.040
Thallium
-
-
Dermal
0.26
-
0.011
0.27
Vanadium
Dermal
0.0057
0.0092
0.015
Zinc
Hematologic, Immune
0.0015
-
0.000064
0.0016
Chemical Total
2.0E-06
-
6.1E-07
2.6E-06
0.40
0.054
0.46
Exposure Point Total
2.6E-06
0.46
Exposure Medium Total
2.6E-06
0.46
Air
OWR
Benzo(a)pyrene
2.6E-11
3E-11
Developmental, Reproductive
0.000037
-
0.000037
Naphthalene
-
1.5E-06
-
-
2E-06
Nervous, Respiratory
-
0.053
-
0.053
Dieldrin
4.3E-11
-
-
4E-11
NA
-
-
-
-
Aluminum
-
-
-
Nervous
0.00059
-
0.00059
Antimony
-
-
-
NA
-
-
-
-
Arsenic
-
1.4E-09
-
1E-09
NA
-
0.000078
-
0.000078
Cobalt
-
4.8E-09
-
-
5E-09
Respiratory
-
0.00031
-
0.00031
Copper
-
-
-
NA
-
-
-
-
Iron
-
-
-
NA
-
-
-
Lead
-
-
-
NA
-
-
-
-
Manganese
-
-
-
Nervous
0.0023
-
0.0023
Thallium
-
-
-
NA
-
-
-
-
Vanadium
-
-
-
Respiratory
-
0.000070
-
0.000070
Zinc
-
-
-
NA
-
-
-
Chemical Total
-
1.5E-06
-
-
1.5E-06
0.056
0.056
Exposure Point Total
1.5E-06
0.056
Exposure Medium Total
1.5E-06
0.056
Medium Total
4.1E-06
0.51
(Scenario timeframe: Future
eceptor Population: Residents
eceptorAqe: Adult
-------
TABLE 9.8.RME
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 3
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
Routes Total
Target Organ(s)
Routes Total
Groundwater
Groundwater
OWR
2-Butanone
-
-
Developmental
0.065
-
0.00054
0.065
2-Hexanone
-
-
Nervous
0.25
0.0084
0.25
Chloroform
2.5E-06
-
1.3E-07
-
2.6E-06
Hepatic
0.028
-
0.0015
0.030
cis-1,2-Dichloroethene
-
-
Urinary
0.028
-
0.0019
0.030
Methyl Tert-Butyl Ether
2.3E-07
-
3.3E-09
-
2.3E-07
NA
-
-
-
Tetrachloroethene
1.2E-06
-
4.3E-07
-
1.6E-06
Nervous, Ocular
0.33
-
0.12
0.45
Trichloroethene (Mutagenic)
1.7E-06
-
1.6E-07
-
1.9E-06
NA
-
-
-
-
Trichloroethene (Nonmutagenic)
3.4E-06
-
3.2E-07
-
3.7E-06
Immune, Developmental
0.64
-
0.06
0.70
Vinyl Chloride
3.5E-06
-
1.3E-07
-
3.6E-06
Hepatic
0.0057
-
0.00021
0.0059
1,4-Dioxane
3.3E-06
-
1.1E-08
-
3.3E-06
Hepatic, Urinary
0.0038
0.000013
0.0038
Bis(2-ethylh exy I )phthalate
1.3E-06
-
-
1.3E-06
Hepatic
0.016
-
-
0.016
Caprolactam
-
-
Developmental
0.17
-
0.0021
0.17
Aluminum
-
-
Nervous
1.7
-
0.0096
1.7
Antimony
-
-
Hematologic
0.098
0.0037
0.10
Arsenic
1.6E-04
-
9.2E-07
-
1.7E-04
Dermal, CVS
1.3
-
0.0071
1.3
Barium
-
-
Urinary
0.10
-
0.0081
0.11
Beryllium
-
-
GS
0.052
-
0.041
0.093
Cadmium
-
-
Urinary
0.025
-
0.0028
0.028
Cobalt
-
-
Thyroid
6.4
0.014
6.4
Copper
GS
0.056
0.00031
0.057
Iron
-
-
GS
1.9
0.011
2.0
Lead
-
-
NA
-
-
-
-
Manganese
Nervous
3.2
0.44
3.6
Mercury
Immune, Urinary
0.013
0.0010
0.014
Nickel
-
-
Body Weight
0.077
0.0022
0.080
Selenium
-
-
Hematologic, Dermal, Nervous
0.019
0.00010
0.019
Thallium
-
-
Dermal
1.6
-
0.0090
1.6
Vanadium
-
-
Dermal
0.074
-
0.016
0.090
Zinc
Hematologic, Immune
0.038
0.00013
0.038
Chemical Total
1.8E-04
-
2.1E-06
-
1.8E-04
18
-
0.8
19
Exposure Point Total
1.8E-04
19
Exposure K
edium Total
1.8E-04
19
(Scenario timeframe: Future
eceptor Population: Residents
eceptorAqe: Adult
-------
TABLE 9.8.RME
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 3 OF 3
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
(Radiation)
Exposure
Routes Total
Primary
Target Organ(s)
Ingestion
Inhalation
Dermal
Exposure
Routes Total
Groundwater
Air
OWR
2-Butanone
2-Hexanone
Chloroform
cis-1,2-Dichloroethene
Methyl Tert-Butyl Ether
Tetrachloroethene
Trichloroethene (Mutagenic)
Trichloroethene (Nonmutagenic)
Vinyl Chloride
1,4-Dioxane
Bis(2-ethylhexyl)phthalate
Caprolactam
Aluminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Cobalt
Copper
Iron
Lead
Manganese
Mercury
Nickel
Selenium
Thallium
Vanadium
Zinc
-
3.3E-05
5.3E-07
2.4E-06
3.2E-06
4.9E-06
5.0E-07
8.6E-08
-
"
3.3E-05
5.3E-07
2.4E-06
3.2E-06
4.9E-06
5.0E-07
8.6E-08
Developmental, Musculosketal
Nervous
Hepatic
NA
Hepatic, Urinary, Ocular
Nervous, Ocular
NA
Hepatic, Urinary
Hepatic
Nervous, Respiratory
NA
Respiratory
Nervous
NA
NA
Developmental
Immune, Respiratory
Urinary
Respiratory
NA
NA
NA
Nervous
Nervous
Respiratory
Respiratory
NA
Respiratory
NA
"
0.042
0.27
0.051
0.0024
0.79
2.8
0.0040
0.0020
"
0.042
0.27
0.051
0.0024
0.79
2.8
0.0040
0.0020
Chemical Total
4.4E-05
4.4E-05
3.9
3.9
Exposure Point Total
4.4E-05
3.9
Exposure Medium Total
4.4E-05
3.9
Medium Total
2.3E-04
23
Sediment
Sediment
OWR
Cobalt
Thyroid
0.008
0.000
0.009
Nickel
-
-
Body Weight
0.013
-
0.014
0.027
IjChemical Total
-
-
0.022
-
0.014
0.036
Exposure Point Total
0.036
Exposure Medium Total
0.036
Medium Total
0.036
Receptor Total
Receptor Risk Total
2.3E-04
Receptor HI Total
23
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005). Total Body Weight HI 0.11
Total CVS HI 1.3
Total Dermal HI 3.3
Total Developmental HI 1.0
Total GS HI 2.2
Total Hematologic HI 0.18
Total Hepatic HI 2.9
Total Immune HI 0.75
Total Nervous HI 7.2
Total Respiratory HI 0.055
Total Thyroid HI 6.4
Total Urinary HI 3.0
Total Ocular HI 1.2
(Scenario Timeframe: Future
eceptor Population: Residents
eceptorAqe: Adult
-------
TABLE 9.9.RME
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 3
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Medium
Exposure
Medium
Exposure
Point
Chemical
of Potential
Concern
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Ingestion
Inhalation
Dermal
External
(Radiation)
Exposure
Routes Total
Primary
Target Organ(s)
Ingestion
Inhalation
Dermal
Exposure
Routes Total
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Benzo(a)pyrene
Naphthalene
Dieldrin
Aluminum
Antimony
Arsenic
Cobalt
Copper
Iron
Lead
Manganese
Thallium
Vanadium
Zinc
1.6E-06
2.5E-06
5.1E-06
"
5.5E-07
7.1E-07
7.2E-07
"
2.2E-06
3.2E-06
5.8E-06
Chemical Total
9.3E-06
-
2.0E-06
-
1.1E-05
Exposure Point Total
1.1E-05
Exposure Medium Total
1.1E-05
Air
OWR
Benzo(a)pyrene
Naphthalene
Dieldrin
Aluminum
Antimony
Arsenic
Cobalt
Copper
Iron
Lead
Manganese
Thallium
Vanadium
Zinc
-
4.6E-11
2.0E-06
5.6E-11
1.9E-09
6.3E-09
-
-
5E-11
2E-06
6E-11
2E-09
6E-09
Chemical Total
-
2.0E-06
-
-
2.0E-06
Exposure Point Total
2.0E-06
Exposure Medium Total
2.0E-06
Medium Total
1.3E-05
-------
TABLE 9.9.RME
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 3
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Exposure
Medium
Exposure
Point
Chemical
of Potential
Concern
Carcinogenic Risk
External
(Radiation)
Exposure
Routes Total
Non-Carcinogenic Hazard Quotient
Primary
Target Organ(s)
Exposure Point Total
Expt
2-Butanone
2-Hexanone
Chloroform
cis-1,2-Dichloroethene
Methyl Tert-Butyl Ether
Tetrachloroethene
Trichloroethene (Mutagenic)
Trichloroethene (Nonmutagenic)
Vinyl Chloride
1,4-Dioxane
Bis(2-ethylh exy I )phthalate
Caprolactam
Aluminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Cobalt
Copper
Iron
Lead
Manganese
Mercury
Nickel
Selenium
Thallium
Vanadium
Zinc
3.5E-07
1.8E-06
3.9E-06
5.0E-06
2.7E-05
4.9E-06
2.0E-06
5.6E-09
7.4E-07
4.9E-07
5.7E-07
1.7E-06
1.6E-08
Chemical Total
3.5E-07
2.5E-06
4.4E-06
5.6E-06
2.8E-05
4.9E-06
2.0E-06
'Osure Medium Total
Exposure
Routes Total
-------
TABLE 9.9.RME
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 3 OF 3
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
(Radiation)
Exposure
Routes Total
Primary
Target Orqan(s)
Ingestion
Inhalation
Dermal
Exposure
Routes Total
Groundwater
Air
OWR
2-Butanone
2-Hexanone
Chloroform
cis-1,2-Dichloroethene
Methyl Tert-Butyl Ether
Tetrachloroethene
Trichloroethene (Mutagenic)
Trichloroethene (Nonmutagenic)
Vinyl Chloride
1,4-Dioxane
Bis(2-ethylh exy I )phthalate
Caprolactam
Aluminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Cobalt
Copper
Iron
Lead
Manganese
Mercury
Nickel
Selenium
Thallium
Vanadium
Zinc
"
3.3E-05
5.3E-07
2.4E-06
3.2E-06
4.9E-06
5.0E-07
8.6E-08
"
"
3.3E-05
5.3E-07
2.4E-06
3.2E-06
4.9E-06
5.0E-07
8.6E-08
Chemical Total
-
4.4E-05
-
-
4.4E-05
Exposure Point Total
4.4E-05
Exposure Medium Total
4.4E-05
Medium Total
3.4E-04
Sediment
Sediment
OWR
Cobalt
Nickel
Chemical Total
-
-
Exposure Point Total
Exposure Medium Total
Medium Total
Receptor Total
Receptor Risk Total
3.6E-04
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 9.1.CTE
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Current
Receptor Population: Industrial Workers
Receptor Age: Adult
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
Routes Total
Target Organ(s)
Routes Total
Surface Soil
Surface Soil
OWR
Benzo(a)pyrene
1.1E-08
-
2.0E-09
-
1.3E-08
Developmental, Immune, Reproductive
0.00036
0.000066
0.00042
Naphthalene
Body Weight
0.00018
0.000034
0.00022
Dieldrin
6.6E-08
9.3E-09
7.5E-08
Hepatic
0.00083
0.00012
0.00094
Aluminum
Nervous
0.0045
0.000063
0.0046
Antimony
Hematologic
0.011
0.00100
0.012
Arsenic
1.8E-07
1.3E-08
1.9E-07
Dermal, CVS
0.0040
0.00028
0.0042
Cobalt
Thyroid
0.0095
0.00013
0.0096
Copper
GS
0.012
0.00016
0.012
Iron
GS
0.011
0.00015
0.011
Lead
NA
Vlanganese
Nervous
0.0071
0.0025
0.0096
Vanadium
--
-
-
Dermal
0.0020
»
0.0011
0.0031
Zinc
--
-
-
Hematologic, Immune
0.00088
-
0.000012
0.00089
Chemical Total
2.5E-07
-
2.4E-08
-
2.8E-07
0.062
-
0.0056
0.068
Exposure Point Total
2.8E-07
0.068
Exposure Medium Total
2.8E-07
0.068
Air
OWR
Benzo(a)pyrene
1.1E-12
-
-
1.1E-12
Developmental, Reproductive
0.0000088
0.0000088
Naphthalene
1.1E-07
1.1E-07
Nervous, Respiratory
0.011
0.011
Dieldrin
3.1E-12
3.1E-12
NA
-
Aluminum
Nervous
0.00015
0.00015
Antimony
NA
Arsenic
1.4E-10
1.4E-10
NA
0.000022
0.000022
Cobalt
4.2E-10
4.2E-10
Respiratory
0.000078
0.000078
Copper
NA
-
Iron
NA
Lead
NA
Vlanganese
Nervous
0.00056
0.00056
Vanadium
-
-
-
Respiratory
0.000017
»
0.000017
Zinc
-
-
-
NA
-
-
Chemical Total
-
1.1E-07
-
-
1.1E-07
0.012
0.012
Exposure Point Total
1.1E-07
0.012
Exposure Medium Total
1.1E-07
0.012
Vledium Total
3.9E-07
0.080
Receptor Total
Receptor Risk Total
3.9E-07
Receptor HI Total
0.080
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 9.2.CTE
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Child
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
Routes Total
Target Organ(s)
Routes Total
Surface Soil
Surface Soil
OWR
Benzo(a)pyrene
2.3E-07
-
2.8E-08
-
2.6E-07
Developmental, Immune, Reproductive
0.0041
0.00050
0.0046
Naphthalene
Body Weight
0.0021
0.00026
0.0024
Dieldrin
2.1E-07
2.0E-08
2.4E-07
Hepatic
0.0094
0.00089
0.010
Aluminum
Nervous
0.051
0.00049
0.052
Antimony
Hematologic
0.12
0.0076
0.13
Arsenic
5.8E-07
2.8E-08
6.1E-07
Dermal, CVS
0.045
0.0021
0.047
Cobalt
Thyroid
0.11
0.0010
0.11
Copper
GS
0.13
0.0013
0.13
Iron
GS
0.12
0.0012
0.12
Lead
NA
Vlanganese
Nervous
0.081
0.019
0.10
Vanadium
--
-
-
Dermal
0.023
»
0.0084
0.032
Zinc
--
-
-
Hematologic, Immune
0.010
-
0.000095
0.010
Chemical Total
1.0E-06
-
7.6E-08
-
1.1E-06
0.71
-
0.043
0.75
Exposure Point Total
1.1E-06
0.75
Exposure Medium Total
1.1E-06
0.75
Air
OWR
Benzo(a)pyrene
6.3E-12
-
-
6.3E-12
Developmental, Reproductive
0.000028
0.000028
Naphthalene
1.0E-07
1.0E-07
Nervous, Respiratory
0.035
0.035
Dieldrin
2.9E-12
2.9E-12
NA
Aluminum
Nervous
0.00047
0.00047
Antimony
NA
Arsenic
1.3E-10
1.3E-10
NA
0.000070
0.000070
Cobalt
3.9E-10
3.9E-10
Respiratory
0.00025
0.00025
Copper
NA
Iron
NA
Lead
NA
Manganese
Nervous
0.0018
0.0018
Vanadium
-
-
Respiratory
0.000053
»
0.000053
Zinc
-
-
NA
-
-
Chemical Total
1.0E-07
-
-
1.0E-07
0.038
0.038
Exposure Point Total
1.0E-07
0.038
Exposure Medium Total
1.0E-07
0.038
Vledium Total
1.2E-06
0.79
Sediment
Sediment
OWR
Cobalt
--
-
-
Thyroid
0.022
0.000
0.022
Nickel
--
-
-
Body Weight
0.036
0.0085
0.044
|chemical Total
--
-
-
0.058
0.009
0.07
Exposure Point Total
0.07
EE Exposure Medium Total
0.07
Vledium Total
0.07
Receptor Total
Recep
or Risk Total
1.2E-06
Receptor HI Total
0.86
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 9.3.CTE
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Adult
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
Routes Total
Target Organ(s)
Routes Total
Surface Soil
Surface Soil
OWR
Benzo(a)pyrene
1.8E-08
2.8E-09
2.1E-08
Developmental, Immune, Reproductive
0.00038
0.000060
0.00044
Naphthalene
Body Weight
0.00020
0.000031
0.00023
Dieldrin
7.1E-08
8.5E-09
7.9E-08
Hepatic
0.00088
0.00011
0.00099
Aluminum
Nervous
0.0048
0.000058
0.0049
Antimony
Hematologic
0.011
0.00091
0.012
Arsenic
1.9E-07
1.1E-08
2.0E-07
Dermal, CVS
0.0042
0.00026
0.0045
Cobalt
Thyroid
0.010
0.00012
0.010
Copper
GS
0.012
0.00015
0.013
Iron
GS
0.012
0.00014
0.012
Lead
NA
Manganese
Nervous
0.0076
0.0023
0.0099
Vanadium
Dermal
0.0022
-
0.0010
0.0032
Zinc
-
Hematologic, Immune
0.00094
-
0.000011
0.00095
Chemical Total
2.8E-07
2.3E-08
-
3.0E-07
0.067
-
0.0051
0.072
Exposure Point Total
3.0E-07
0.072
Exposure Medium Total
3.0E-07
0.072
Air
OWR
Benzo(a)pyrene
5.3E-12
5.3E-12
Developmental, Reproductive
-
0.000028
0.000028
Naphthalene
3.6E-07
3.6E-07
Nervous, Respiratory
0.035
0.035
Dieldrin
1.0E-11
1.0E-11
NA
Aluminum
Nervous
0.00047
0.00047
Antimony
NA
Arsenic
4.5E-10
4.5E-10
NA
0.000070
0.000070
Cobalt
1.4E-09
1.4E-09
Respiratory
-
0.00025
0.00025
Copper
NA
Iron
NA
Lead
NA
Manganese
Nervous
0.0018
0.0018
Vanadium
Respiratory
»
0.000053
»
0.000053
Zinc
NA
-
-
-
-
Chemical Total
3.6E-07
3.6E-07
0.038
0.038
Exposure Point Total
3.6E-07
0.038
Exposure Medium Total
3.6E-07
0.038
Vledium Total
6.6E-07
0.11
Sediment
Sediment
OWR
Cobalt
Thyroid
0.0021
-
0.0000
0.0021
Nickel
Body Weight
0.0033
-
0.0010
0.0043
Chemical Total
0.0054
-
0.0010
0.006
Exposure Point Total
0.006
Exposure Medium Total
0.006
Vledium Total
0.006
Receptor Total
Receptor Risk Total
6.6E-07
ReceptorHI Total
0.12
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 9.4.CTE
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Medium
Exposure
Medium
Exposure
Point
Chemical
of Potential
Concern
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Ingestion
Inhalation
Dermal
External
(Radiation)
Exposure
Routes Total
Primary
Target Organ(s)
Ingestion
Inhalation
Dermal
Exposure
Routes Total
Surface Soil
Surface Soil
OWR
Benzo(a)pyrene
Naphthalene
Dieldrin
Aluminum
Antimony
Arsenic
Cobalt
Copper
Iron
Lead
Manganese
Vanadium
Zinc
2.5E-07
2.9E-07
7.7E-07
3.1E-08
2.9E-08
3.9E-08
2.8E-07
3.1E-07
8.1E-07
See Tables 9.2.CTE and 9.3.CTE for Hazard Indices
Chemical Total
1.3E-06
9.9E-08
--
1.4E-06
Exposure Point Total
1.4E-06
Exposure Medium Total
1.4E-06
Air
OWR
Benzo(a)pyrene
Naphthalene
Dieldrin
Aluminum
Antimony
Arsenic
Cobalt
Copper
Iron
Lead
Manganese
Vanadium
Zinc
1.2E-11
4.6E-07
1.3E-11
5.8E-10
1.7E-09
1.2E-11
4.6E-07
1.3E-11
5.8E-10
1.7E-09
Chemical Total
4.6E-07
4.6E-07
Exposure Point Total
4.6E-07
Exposure Medium Total
4.6E-07
Vledium Total
1.9E-06
Sediment
Sediment
OWR
Cobalt
Nickel
Chemical Total
Exposure Point Total
Exposure Medium Total
Vledium Total
Receptor Total
Receptor Risk Total
1.9E-06
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 9.5.CTE
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 3
Scenario Timeframe: Future
Receptor Population: Construction Workers
Receptor Age: Adult
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
Routes Total
Target Orqan(s)
Routes Total
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Benzo(a)pyrene
2.5E-09
-
7.1E-10
3.2E-09
Developmental, Immune, Reproductive
0.00059
-
0.00016
0.00076
Naphthalene
Nervous
0.000012
0.0000032
0.000015
Dieldrin
1.8E-08
3.8E-09
2.2E-08
Hepatic
0.00078
0.00017
0.00094
Aluminum
Nervous
0.0070
0.00015
0.0072
Antimony
Hematologic
0.011
0.0016
0.013
Arsenic
3.6E-08
3.8E-09
4.0E-08
Dermal, CVS
0.0056
0.00060
0.0062
Cobalt
Thyroid
0.0015
0.000032
0.0015
Copper
GS
0.012
0.00025
0.012
Iron
GS
0.019
0.00041
0.020
Lead
NA
-
Manganese
Nervous
0.011
0.0061
0.018
Thallium
-
--
-
Dermal
0.038
-
0.00080
0.038
Vanadium
-
--
-
Urinary
0.0017
-
0.0014
0.0030
Zinc
-
-
Hematologic
0.00089
-
0.000019
0.00091
Chemical Total
5.6E-08
-
8.3E-09
-
6.5E-08
0.11
-
0.012
0.12
Exposure Point Total
6.5E-08
0.12
Exposure IV
edium Total
6.5E-08
0.12
Air
OWR
Benzo(a)pyrene
1.8E-10
1.8E-10
Developmental, Reproductive
-
0.010
0.010
Naphthalene
5.3E-08
5.3E-08
Nervous, Respiratory
-
0.036
0.036
Dieldrin
5.9E-10
5.9E-10
NA
-
Aluminum
Nervous
-
0.16
0.16
Antimony
NA
-
Arsenic
2.0E-08
2.0E-08
NA
-
0.021
0.021
Cobalt
6.6E-08
6.6E-08
Respiratory
-
0.026
0.026
Copper
NA
-
Iron
NA
-
Lead
-
NA
-
-
Manganese
Nervous
-
0.63
0.63
Thallium
-
NA
-
-
Vanadium
Respiratory
-
0.019
0.019
Zinc
-
NA
-
-
-
-
Chemical Total
1.4E-07
-
-
1.4E-07
0.91
0.91
Exposure Point Total
1.4E-07
0.91
Exposure Medium Total
1.4E-07
0.91
Vledium Total
2.0E-07
1.0
-------
TABLE 9.5.CTE
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 3
Scenario Timeframe: Future
Receptor Population: Construction Workers
Receptor Age: Adult
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
(Radiation)
Exposure
Routes Total
Primary
Target Organ(s)
Ingestion
Inhalation
Dermal
Exposure
Routes Total
Groundwater
Groundwater
OWR
2-Butanone
cis-1,2-Dichloroethene
Methyl tert-butyl ether
1.3E-12
8.6E-13
2.1E-12
Developmental
Urinary
NA
5.1 E-8
0.0000080
1.6E-8
0.000028
6.7E-8
0.000036
Trichloroethene
9.1E-10
3.7E-09
4.6E-09
Immune, Developmental
0.0028
0.011
0.014
1,4-Dioxane
2.8E-10
3.0E-11
3.1E-10
Hepatic
0.00000039
4.3E-8
0.00000043
Caprolactam
Urinary
0.00000038
0.00000013
0.00000051
Aluminum
Nervous
0.0059
0.0017
0.0075
Antimony
Hematologic
0.000059
0.00011
0.00017
Arsenic
6.6E-08
1.9E-08
8.5E-08
Dermal, CVS
0.010
0.0029
0.013
Barium
Urinary
0.00085
0.0034
0.0043
Beryllium
None Reported
0.00018
0.0074
0.0076
Cadmium
Urinary
0.000046
0.00026
0.00031
Cobalt
Thyroid
0.00021
0.000024
0.00023
Copper
GS
0.000051
0.000014
0.000066
Iron
GS
0.0055
0.0016
0.0070
Lead
NA
-
Manganese
Nervous
0.0022
0.015
0.018
Mercury
Nervous
0.0000023
0.0000094
0.000012
Nickel
Body Weight
0.000041
0.000057
0.000098
Selenium
Body Weight
0.000016
0.0000046
0.000021
Thallium
Dermal
0.0030
0.00083
0.0038
Vanadium
Urinary
0.00016
0.0017
0.0019
Zinc
Hematologic
0.000059
0.0000099
0.000069
Chemical Total
6.7E-08
2.2E-08
9.0E-08
0.031
0.047
0.08
Exposure Point Total
9.0E-08
0.08
Exposure IV
edium Total
9.0E-08
0.08
-------
TABLE 9.5.CTE
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 3 OF 3
Scenario Timeframe: Future
Receptor Population: Construction Workers
Receptor Age: Adult
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
Routes Total
Target Orqan(s)
Routes Total
Groundwater
Air
OWR
2-Butanone
-
Developmental
-
0.00013
-
0.00013
cis-1,2-Dichloroethene
NA
-
Methyl tert-butyl ether
3.9E-10
3.9E-10
Hepatic, Urinary, Ocular
»
0.000035
0.000035
Trichloroethene
1.6E-07
1.6E-07
Immune, Developmental
»
1.3
1.3
1,4-Dioxane
2.4E-09
2.4E-09
Respiratory
»
0.000048
0.000048
Caprolactam
Respiratory
-
Aluminum
Nervous
»
Antimony
NA
-
Arsenic
NA
»
Barium
Developmental
-
Beryllium
Immune, Respiratory
»
Cadmium
Urinary
»
Cobalt
Respiratory
»
Copper
NA
»
Iron
NA
»
Lead
NA
-
Manganese
Nervous
-
Mercury
Nervous
»
Nickel
Respiratory
»
Selenium
Respiratory
--
Thallium
NA
»
»
»
Vanadium
Respiratory
-
-
-
Zinc
NA
-
-
-
Chemical Total
1.6E-07
1.6E-07
1.3
1.3
Exposure Point Total
1.6E-07
1.3
Exposure IV
edium Total
1.6E-07
1.3
Vledium Total
2.5E-07
1.4
Receptor Total
Recep
or Risk Total
4.5E-07
Receptor HI Total
2.4
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
Total Body Weight HI
Total CVS HI
Total Dermal HI
Total Developmental HI
Total GS HI
Total Hematologic HI
Total Hepatic HI
Total Immune HI
Total Nervous HI
Total None Reported HI
Total Reproductive HI
Total Respiratory HI
Total Thyroid HI
Total Urinary HI
Total Ocular HI
-------
TABLE 9.6.CTE
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 3
Scenario Timeframe: Future
Receptor Population: Industrial Worker
Receptor Age: Adult
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
Routes Total
Target Organ(s)
Routes Total
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Benzo(a)pyrene
9.5E-09
-
1.7E-09
-
1.1E-08
Developmental, Immune, Reproductive
0.00032
0.000058
0.00037
Naphthalene
Body Weight
0.00018
0.000034
0.00022
Dieldrin
6.6E-08
9.3E-09
7.5E-08
Hepatic
0.00083
0.00012
0.00094
Aluminum
Nervous
0.0037
0.000053
0.0038
Antimony
Hematologic
0.006
0.00057
0.007
Arsenic
1.3E-07
9.4E-09
1.4E-07
Dermal, CVS
0.0030
0.00021
0.0032
Cobalt
Thyroid
0.0079
0.00011
0.0080
Copper
GS
0.006
0.00009
0.006
Iron
GS
0.010
0.00015
0.010
Lead
NA
Manganese
Nervous
0.0061
0.0021
0.0082
Thallium
--
-
-
Dermal
0.080
0.0011
0.081
Vanadium
--
-
-
Dermal
0.0018
0.0010
0.0027
Zinc
-
-
Hematologic, Immune
0.00048
-
0.000007
0.00048
Chemical Total
2.1E-07
-
2.0E-08
-
2.3E-07
0.127
-
0.0056
0.13
Exposure Point Total
2.3E-07
0.13
Exposure IV
edium Total
2.3E-07
0.13
Air
OWR
Benzo(a)pyrene
9E-13
9E-13
Developmental, Reproductive
0.0000078
-
0.0000078
Naphthalene
1E-07
1E-07
Nervous, Respiratory
0.011
-
0.011
Dieldrin
3E-12
3E-12
NA
Aluminum
Nervous
0.00012
0.00012
Antimony
NA
Arsenic
1E-10
1E-10
NA
0.000016
0.000016
Cobalt
4E-10
4E-10
Respiratory
0.000065
0.000065
Copper
NA
Iron
NA
Lead
NA
Manganese
Nervous
0.00048
0.00048
Thallium
NA
Vanadium
Respiratory
0.000015
0.000015
Zinc
-
NA
Chemical Total
1.1E-07
-
-
1.1E-07
0.012
0.012
Exposure Point Total
1.1E-07
0.012
Exposure Medium Total
1.1E-07
0.012
Vledium Total
3.4E-07
0.14
-------
TABLE 9.6.CTE
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 3
Scenario Timeframe: Future
Receptor Population: Industrial Worker
Receptor Age: Adult
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
(Radiation)
Exposure
Routes Total
Primary
Target Organ(s)
Ingestion
Inhalation
Dermal
Exposure
Routes Total
Groundwater
Groundwater
OWR
2-Butanone
2-Hexanone
--
-
-
Developmental
Nervous
0.0098
0.037
0.000035
0.00056
0.0098
0.037
Chloroform
1.2E-07
2.9E-09
1.3E-07
Hepatic
0.0042
0.00010
0.0043
cis-1,2-Dichloroethene
Urinary
0.0042
0.00013
0.0044
Vlethyl Tert-Butyl Ether
1.1E-08
7.2E-11
1.2E-08
NA
Tetrachloroethene
5.9E-08
9.5E-09
6.8E-08
Nervous, Ocular
0.049
0.008
0.057
Trichloroethene
2.1E-07
8.9E-09
2.2E-07
Immune, Developmental
0.095
0.0041
0.10
Vinyl Chloride
1.7E-07
2.7E-09
1.8E-07
Hepatic
0.00086
0.000013
0.00087
1,4-Dioxane
1.6E-07
2.5E-10
1.6E-07
Hepatic, Urinary
0.00058
0.00000088
0.00058
Bis(2-ethylhexyl)phthalate
6.5E-08
6.5E-08
Hepatic
0.0025
0.0025
Caprolactam
Developmental
0.025
0.00014
0.025
Aluminum
Nervous
0.26
0.00038
0.26
Antimony
Hematologic
0.015
0.00014
0.015
Arsenic
8.1E-06
1.2E-08
8.2E-06
Dermal, CVS
0.19
0.00028
0.19
Barium
Urinary
0.015
0.00032
0.015
Beryllium
GS
0.0078
0.0016
0.0094
Cadmium
Urinary
0.0038
0.00011
0.0039
Cobalt
Thyroid
0.96
0.00056
0.96
Copper
GS
0.0085
0.000012
0.0085
Iron
GS
0.29
0.00043
0.29
Lead
NA
Vlanganese
Nervous
0.47
0.017
0.49
Vlercury
Immune, Urinary
0.0019
0.000040
0.0020
Mickel
Body Weight
0.012
0.000085
0.012
Selenium
Hematologic, Dermal, Nervous
0.0028
0.0000041
0.0028
Thallium
--
-
-
Dermal
0.24
0.00036
0.24
Vanadium
--
-
-
Dermal
0.011
0.00063
0.012
Zinc
--
-
-
Hematologic, Immune
0.0057
0.0000050
0.0057
Chemical Total
8.9E-06
-
3.6E-08
-
9.0E-06
2.7
0.035
2.8
Exposure Point Total
9.0E-06
2.8
Exposure Medium Total
9.0E-06
2.8
-------
TABLE 9.6.CTE
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 3 OF 3
Scenario Timeframe: Future
Receptor Population: Industrial Worker
Receptor Age: Adult
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
Routes Total
Target Organ(s)
Routes Total
Groundwater
Air
OWR
2-Butanone
-
-
Developmental, Musculosketal
0.0020
0.0020
2-Hexanone
Nervous
0.013
0.013
Chloroform
5.2E-07
5.2E-07
Hepatic
0.0024
0.0024
cis-1,2-Dichloroethene
NA
Vlethyl Tert-Butyl Ether
8.4E-09
8.4E-09
Hepatic, Urinary, Ocular
0.00011
0.00011
Tetrachloroethene
3.8E-08
3.8E-08
Nervous, Ocular
0.038
0.038
Trichloroethene
1.0E-07
1.0E-07
Immune, Developmental
0.13
0.13
Vinyl Chloride
7.9E-09
7.9E-09
Hepatic
0.00019
0.00019
1,4-Dioxane
1.4E-09
1.4E-09
Nervous, Respiratory
0.000097
0.000097
Bis(2-ethylhexyl)phthalate
NA
Caprolactam
Respiratory
Aluminum
Nervous
Antimony
NA
Arsenic
NA
Barium
Developmental
Beryllium
Immune, Respiratory
Cadmium
Urinary
Cobalt
Respiratory
Copper
NA
Iron
NA
Lead
NA
Vlanganese
Nervous
Vlercury
Nervous
Mickel
Respiratory
Selenium
Respiratory
Thallium
-
-
NA
»
»
»
»
Vanadium
-
-
Respiratory
-
-
-
-
Zinc
-
-
NA
-
-
-
-
Chemical Total
6.8E-07
-
-
6.8E-07
0.19
0.19
Exposure Point Total
6.8E-07
0.19
Exposure Medium Total
6.8E-07
0.19
Vledium Total
9.7E-06
3.0
Receptor Total
Recep
or Risk Total
1.0E-05
Receptor HI Total
3.1
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
Total Body Weight HI
0.012
Total CVS HI
0.20
Total Dermal HI
0.54
Total Developmental HI
0.27
Total GS HI
0.33
Total Hematologic HI
0.030
Total Hepatic HI
0.012
Total Immune HI
0.24
Total Nervous HI
0.92
Total Respiratory HI
0.011
Total Thyroid HI
0.97
Total Urinary HI
0.026
Total Ocular HI
0.096
Total Reproductive HI
0.00038
-------
TABLE 9.7.CTE
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 3
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Child
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
RoutesTotal
Target Organ(s)
Routes Total
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Benzo(a)pyrene
2.0E-07
-
2.5E-08
2.2E-07
Developmental, Immune, Reproductive
0.0036
0.00044
0.0040
Naphthalene
-
Body Weight
0.0021
0.00026
0.0024
Dieldrin
2.1E-07
2.0E-08
2.4E-07
Hepatic
0.0094
-
0.00089
0.010
Aluminum
-
Nervous
0.042
0.00040
0.043
Antimony
-
-
Hematologic
0.069
0.0044
0.074
Arsenic
4.3E-07
-
2.1E-08
4.5E-07
Dermal, CVS
0.034
-
0.0016
0.035
Cobalt
-
Thyroid
0.090
0.00085
0.091
Copper
GS
0.071
0.00067
0.071
Iron
-
GS
0.12
0.0011
0.12
Lead
-
NA
-
Manganese
-
Nervous
0.069
0.016
0.085
Thallium
-
Dermal
0.91
0.0086
0.92
Vanadium
--
-
Dermal
0.020
0.0074
0.028
Zinc
--
-
Hematologic, Immune
0.0054
0.000051
0.0055
Chemical Total
8.5E-07
6.6E-08
-
9.1E-07
1.4
0.043
1.5
Exposure Point Total
9.1E-07
1.5
Exposure Medium Total
9.1E-07
1.5
Air
OWR
Benzo(a)pyrene
5.6E-12
-
5.6E-12
Developmental, Reproductive
0.000025
-
0.000025
Naphthalene
-
1.0E-07
-
-
1.0E-07
Nervous, Respiratory
-
0.035
-
0.035
Dieldrin
2.9E-12
2.9E-12
NA
-
-
-
-
Aluminum
-
Nervous
0.00039
-
0.00039
Antimony
-
-
-
NA
-
-
-
-
Arsenic
-
9.6E-11
-
-
9.6E-11
NA
0.000052
-
0.000052
Cobalt
3.2E-10
3.2E-10
Respiratory
-
0.00021
-
0.00021
Copper
-
-
-
NA
-
-
-
-
Iron
-
-
NA
-
Lead
-
-
-
NA
-
-
-
-
Manganese
-
-
-
Nervous
0.0015
0.0015
Thallium
-
-
-
NA
-
-
-
-
Vanadium
-
-
-
Respiratory
-
0.000047
-
0.000047
Zinc
-
-
-
NA
-
-
-
-
Chemical Total
-
1.0E-07
-
-
1.0E-07
0.038
0.038
Exposure Point Total
1.0E-07
0.038
Exposure Medium Total
1.0E-07
0.038
Medium Total
1.0E-06
1.5
-------
TABLE 9.7.CTE
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 3
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Child
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
(Radiation)
Exposure
RoutesTotal
Primary
Target Organ(s)
Ingestion
Inhalation
Dermal
Exposure
Routes Total
Groundwater
Groundwater
OWR
2-Butanone
2-Hexanone
"
Developmental
Nervous
0.042
0.16
"
0.00046
0.0078
0.042
0.17
Chloroform
2.4E-07
2.6E-08
2.7E-07
Hepatic
0.018
-
0.0019
0.020
cis-1,2-Dichloroethene
-
-
Urinary
0.018
-
0.0027
0.021
Methyl Tert-Butyl Ether
2.2E-08
-
6.0E-10
-
2.3E-08
NA
-
-
-
-
Tetrachloroethene
1.1E-07
-
8.1E-08
-
1.9E-07
Nervous, Ocular
0.21
-
0.15
0.36
Trichloroethene (Mutagenic)
6.2E-07
-
1.2E-07
-
7.5E-07
NA
-
-
-
-
Trichloroethene (Nonmutagenic)
3.2E-07
6.4E-08
3.9E-07
Immune, Developmental
0.41
0.080
0.49
Vinyl Chloride
1.3E-05
-
1.2E-06
-
1.4E-05
Hepatic
0.0037
-
0.00033
0.0040
1,4-Dioxane
3.2E-07
-
1.4E-09
-
3.2E-07
Hepatic, Urinary
0.0025
-
0.000011
0.0025
Bis(2-ethylh exy I )phthalate
1.3E-07
-
-
1.3E-07
Hepatic
0.011
-
-
0.011
Caprolactam
-
Developmental
0.11
0.0016
0.11
Aluminum
-
-
Nervous
1.1
0.0052
1.1
Antimony
-
-
Hematologic
0.063
-
0.0020
0.065
Arsenic
1.6E-05
-
7.4E-08
-
1.6E-05
Dermal, CVS
0.82
-
0.0038
0.82
Barium
-
-
Urinary
0.065
-
0.0043
0.069
Beryllium
-
-
GS
0.033
-
0.022
0.055
Cadmium
-
-
Urinary
0.016
-
0.0015
0.018
Cobalt
-
-
Thyroid
4.1
0.0076
4.1
Copper
-
-
GS
0.0362
-
0.000169
0.0363
Iron
-
-
GS
1.2
-
0.0058
1.3
Lead
-
-
NA
-
-
-
-
Manganese
-
-
Nervous
2.0
-
0.24
2.3
Mercury
-
-
Immune, Urinary
0.0082
-
0.00055
0.0088
Nickel
-
-
Body Weight
0.050
-
0.0012
0.051
Selenium
-
-
Hematologic, Dermal, Nervous
0.012
-
0.000056
0.012
Thallium
-
-
Dermal
1.0
-
0.0048
1.0
Vanadium
--
-
-
Dermal
0.047
-
0.0085
0.056
Zinc
--
-
-
Hematologic, Immune
0.024
-
0.000068
0.024
Chemical Total
3.0E-05
-
1.5E-06
-
3.2E-05
11.7
-
0.55
12
Exposure Point Total
3.2E-05
12
Exposure to
edium Total
3.2E-05
12
Medium Total
3.2E-05
12
-------
TABLE 9.7.CTE
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 3 OF 3
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Child
Medium
Exposure
Medium
Exposure
Point
Chemical
of Potential
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Concern
Ingestion
Inhalation
Dermal
External
(Radiation)
Exposure
RoutesTotal
Primary
Target Organ(s)
Ingestion
Inhalation
Dermal
Exposure
Routes Total
Sediment
Sediment
OWR
Cobalt
Nickel
"
"
Thyroid
Body Weight
0.022
0.036
~
0.000
0.0085
0.022
0.044
Chemical Total
-
-
0.058
-
0.009
0.07
Exposure Point Total
0.07
Exposure Medium Total
0.07
Medium Total
0.07
ReceptorTotal
Receptor Risk Total
3.3E-05
Receptor HI Total
14
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
Total Body Weight HI
Total CVS HI
Total Dermal HI
Total Developmental HI
Total GS HI
Total Hematologic HI
Total Hepatic HI
Total Immune HI
Total Nervous HI
Total Respiratory HI
Total Thyroid HI
Total Urinary HI
Total Ocular HI
Total Reproductive HI
-------
TABLE 9.8.CTE
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 3
Scenario Timeframe: Future I
Receptor Population: Residents
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
Routes Total
Tarqet Orqan(s)
Routes Total
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Benzo(a)pyrene
1.6E-08
-
2.5E-09
-
1.8E-08
Developmental, Immune, Reproductive
0.00034
-
0.000053
0.00039
Naphthalene
-
-
Body Weight
0.00020
0.000031
0.00023
Dieldrin
7.1E-08
-
8.5E-09
-
7.9E-08
Hepatic
0.00088
-
0.00011
0.00099
Aluminum
Nervous
0.0040
0.000048
0.0040
Antimony
-
Hematologic
0.0065
0.00052
0.0070
Arsenic
1.4E-07
-
8.6E-09
1.5E-07
Dermal, CVS
0.0032
-
0.00019
0.0034
Cobalt
-
Thyroid
0.0084
0.00010
0.0085
Copper
GS
0.0066
0.000080
0.0067
Iron
GS
0.011
0.00013
0.011
Lead
-
-
NA
-
-
-
-
Manganese
Nervous
0.0065
0.0020
0.0084
Thallium
Dermal
0.085
0.0010
0.086
Vanadium
-
Dermal
0.0019
0.00088
0.0028
Zinc
-
Hematologic, Immune
0.00051
0.0000061
0.00051
Chemical Total
2.3E-07
2.0E-08
-
2.5E-07
0.14
0.0051
0.14
Exposure Point Total
2.5E-07
0.14
Exposure Medium Total
2.5E-07
0.14
Air
OWR
Benzo(a)pyrene
4.7E-12
-
5E-12
Developmental, Reproductive
-
0.000025
-
0.000025
Naphthalene
-
3.6E-07
-
-
4E-07
Nervous, Respiratory
0.035
-
0.035
Dieldrin
-
1.0E-11
-
-
1E-11
NA
-
-
-
-
Aluminum
-
Nervous
0.00039
-
0.00039
Antimony
-
-
-
NA
-
-
-
-
Arsenic
-
3.4E-10
-
3E-10
NA
0.000052
-
0.000052
Cobalt
-
1.1E-09
-
-
1E-09
Respiratory
-
0.00021
-
0.00021
Copper
-
-
-
NA
-
-
-
-
Iron
-
-
-
NA
-
-
Lead
-
-
-
NA
-
-
-
-
Manganese
-
Nervous
0.0015
-
0.0015
Thallium
-
-
-
NA
-
-
-
-
Vanadium
-
-
-
Respiratory
-
0.000047
-
0.000047
Zinc
-
-
-
NA
-
-
-
-
Chemical Total
-
3.6E-07
-
-
3.6E-07
0.038
0.038
Exposure Point Total
3.6E-07
0.038
Exposure Medium Total
3.6E-07
0.038
Medium Total
6.1E-07
0.18
-------
TABLE 9.8.CTE
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 3
Scenario Timeframe: Future I
Receptor Population: Residents
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
(Radiation)
Exposure
Routes Total
Primary
Tarqet Orqan(s)
Ingestion
Inhalation
Dermal
Exposure
Routes Total
Groundwater
Groundwater
OWR
2-Butanone
2-Hexanone
"
"
Developmental
Nervous
0.021
0.079
"
0.00021
0.0033
0.021
0.082
Chloroform
3.6E-07
-
2.3E-08
-
3.8E-07
Hepatic
0.0090
0.00059
0.010
cis-1,2-Dichloroethene
-
Urinary
0.0090
0.0008
0.010
Methyl Tert-Butyl Ether
3.3E-08
5.8E-10
3.4E-08
NA
-
-
-
-
Tetrachloroethene
1.7E-07
-
7.7E-08
-
2.5E-07
Nervous, Ocular
0.11
-
0.048
0.15
Trichloroethene (Mutagenic)
1.8E-07
-
2.1E-08
2.0E-07
NA
-
-
-
-
Trichloroethene (Nonmutagenic)
4.8E-07
5.8E-08
5.4E-07
Immune, Developmental
0.20
-
0.024
0.23
Vinyl Chloride
5.1E-07
-
2.2E-08
-
5.3E-07
Hepatic
0.0018
-
0.00008
0.0019
1,4-Dioxane
4.7E-07
-
2.0E-09
-
4.8E-07
Hepatic, Urinary
0.0012
-
0.0000052
0.0012
Bis(2-ethylhexyl)phthalate
1.9E-07
-
1.9E-07
Hepatic
0.0053
-
-
0.0053
Caprolactam
-
-
Developmental
0.054
-
0.00082
0.055
Aluminum
-
Nervous
0.55
0.0023
0.56
Antimony
-
Hematologic
0.031
0.00086
0.032
Arsenic
2.4E-05
-
9.7E-08
-
2.4E-05
Dermal, CVS
0.41
-
0.0017
0.41
Barium
Urinary
0.032
0.0019
0.034
Beryllium
GS
0.017
0.0097
0.026
Cadmium
-
-
Urinary
0.0082
0.00067
0.0088
Cobalt
-
-
Thyroid
2.0
-
0.0034
2.1
Copper
-
-
GS
0.018
-
0.000074
0.018
Iron
-
-
GS
0.62
-
0.0026
0.63
Lead
-
-
NA
-
-
-
-
Manganese
-
-
Nervous
1.0
-
0.10
1.1
Mercury
-
-
Immune, Urinary
0.0041
0.00024
0.0043
Nickel
-
-
Body Weight
0.025
-
0.00051
0.025
Selenium
-
-
Hematologic, Dermal, Nervous
0.0060
-
0.000024
0.0060
Thallium
-
-
Dermal
0.52
-
0.0021
0.52
Vanadium
-
-
Dermal
0.024
-
0.0037
0.027
Zinc
-
-
Hematologic, Immune
0.012
-
0.000030
0.012
Chemical Total
2.6E-05
-
3.0E-07
-
2.6E-05
5.8
-
0.21
6.0
Exposure Point Total
2.6E-05
6.0
Exposure to
edium Total
2.6E-05
6.0
-------
TABLE 9.8.CTE
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 3 OF 3
Scenario Timeframe: Future
Receptor Population: Residents
j|Rece£torA^^^^^^^^^^_
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
(Radiation)
Exposure
Routes Total
Primary
Tarqet Orqan(s)
Ingestion
Inhalation
Dermal
Exposure
Routes Total
Groundwater
Air
OWR
2-Butanone
2-Hexanone
"
"
"
Developmental, Musculosketal
Nervous
"
0.0022
0.014
"
0.0022
0.014
Chloroform
-
7.6E-07
-
-
7.6E-07
Hepatic
-
0.0026
-
0.0026
cis-1,2-Dichloroethene
-
-
-
NA
-
-
-
-
Methyl Tert-Butyl Ether
-
1.2E-08
-
-
1.2E-08
Hepatic, Urinary, Ocular
-
0.00012
-
0.00012
Tetrachloroethene
-
5.5E-08
-
-
5.5E-08
Nervous, Ocular
-
0.041
-
0.041
Trichloroethene (Mutagenic)
-
5.3E-08
-
-
5.3E-08
NA
-
-
-
-
Trichloroethene (Nonmutagenic)
1.1E-07
1.1E-07
Hepatic, Urinary
0.14
-
0.14
Vinyl Chloride
1.2E-08
1.2E-08
Hepatic
-
0.00020
-
0.00020
1,4-Dioxane
-
2.0E-09
-
-
2.0E-09
Nervous, Respiratory
-
0.00010
-
0.00010
Bis(2-ethylhexyl)phthalate
-
-
-
NA
-
-
-
-
Caprolactam
-
-
Respiratory
Aluminum
-
Nervous
Antimony
-
-
NA
-
Arsenic
-
-
-
NA
-
-
-
-
Barium
Developmental
-
-
-
-
Beryllium
-
-
-
Immune, Respiratory
-
-
-
-
Cadmium
-
-
-
Urinary
-
-
-
Cobalt
-
-
-
Respiratory
-
-
-
-
Copper
-
-
-
NA
-
-
-
-
Iron
-
-
-
NA
-
-
-
-
Lead
-
-
-
NA
-
-
-
-
Manganese
-
-
-
Nervous
-
-
-
Mercury
-
-
-
Nervous
Nickel
-
-
-
Respiratory
-
-
-
-
Selenium
-
-
Respiratory
-
-
-
Thallium
-
-
-
NA
-
-
-
-
Vanadium
-
-
-
Respiratory
-
-
-
-
Zinc
-
-
-
NA
-
-
-
-
Chemical Total
-
1.0E-06
-
-
1.0E-06
0.20
0.20
Exposure Point Total
1.0E-06
0.20
Exposure Medium Total
1.0E-06
0.20
Medium Total
2.7E-05
6.2
Sediment
Sediment
OWR
Cobalt
-
-
Thyroid
0.0021
0.0000
0.0021
Nickel
-
-
Body Weight
0.0033
-
0.0010
0.0043
Chemical Total
-
-
0.0054
-
0.0010
0.006
Exposure Point Total
0.006
Exposure Medium Total
0.006
Medium Total
0.006
ReceptorTotal
Receptor Risk Total
2.8E-05
Receptor HI Total
6.4
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
Total Body Weight HI
Total CVS HI
Total Dermal HI
Total Developmental HI
Total GS HI
Total Hematologic HI
Total Hepatic HI
Total Immune HI
Total Nervous HI
Total Respiratory HI
Total Thyroid HI
Total Urinary HI
Total Ocular HI
Total Reproductive HI
-------
TABLE 9.9.CTE
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 3
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
(Radiation)
Exposure
Routes Total
Primary
Target Organ(s)
Ingestion
Inhalation
Dermal
Exposure
Routes Total
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Benzo(a)pyrene
Naphthalene
Dieldrin
Aluminum
Antimony
Arsenic
Cobalt
Copper
Iron
Lead
Manganese
Thallium
Vanadium
Zinc
2.2E-07
2.9E-07
5.8E-07
"
2.7E-08
2.9E-08
2.9E-08
"
2.4E-07
3.1E-07
6.1E-07
Chemical Total
1.1E-06
-
8.5E-08
-
1.2E-06
Exposure Point Total
1.2E-06
Exposure Medium Total
1.2E-06
Air
OWR
Benzo(a)pyrene
Naphthalene
Dieldrin
Aluminum
Antimony
Arsenic
Cobalt
Copper
Iron
Lead
Manganese
Thallium
Vanadium
Zinc
-
1.0E-11
4.6E-07
1.3E-11
4.3E-10
1.4E-09
-
-
1E-11
5E-07
1E-11
4E-10
1E-09
Chemical Total
-
4.6E-07
-
-
4.6E-07
Exposure Point Total
4.6E-07
Exposure Medium Total
4.6E-07
Medium Total
1.6E-06
-------
TABLE 9.9.CTE
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 2 OF 3
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Exposure
Medium
Exposure
Point
Chemical
of Potential
Concern
Carcinogenic Risk
External
(Radiation)
Exposure
Routes Total
Non-Carcinogenic Hazard Quotient
Primary
Target Organ(s)
Exposure Point Total
Expt
2-Butanone
2-Hexanone
Chloroform
cis-1,2-Dichloroethene
Methyl Tert-Butyl Ether
Tetrachloroethene
Trichloroethene (Mutagenic)
Trichloroethene (Nonmutagenic)
Vinyl Chloride
1,4-Dioxane
Bis(2-ethylh exy I )phthalate
Caprolactam
Aluminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Cobalt
Copper
Iron
Lead
Manganese
Mercury
Nickel
Selenium
Thallium
Vanadium
Zinc
5.6E-08
2.8E-07
8.0E-07
8.1E-07
1.3E-05
7.9E-07
3.2E-07
1.2E-09
1.6E-07
1.4E-07
1.2E-07
1.2E-06
3.4E-09
Chemical Total
5.7E-08
4.4E-07
9.4E-07
9.3E-07
1.4E-05
7.9E-07
3.2E-07
'Osure Medium Total
Exposure
Routes Total
-------
TABLE 9.9.CTE
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 3 OF 3
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Medium
Exposure
Medium
Exposure
Point
Chemical
of Potential
Concern
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Ingestion
Inhalation
Dermal
External
(Radiation)
Exposure
Routes Total
Primary
Target Organ(s)
Ingestion
Inhalation
Dermal
Exposure
Routes Total
Groundwater
Air
OWR
2-Butanone
2-Hexanone
Chloroform
cis-1,2-Dichloroethene
Methyl Tert-Butyl Ether
Tetrachloroethene
Trichloroethene (Mutagenic)
Trichloroethene (Nonmutagenic)
Vinyl Chloride
1,4-Dioxane
Bis(2-ethylh exy I )phthalate
Caprolactam
Aluminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Cobalt
Copper
Iron
Lead
Manganese
Mercury
Nickel
Selenium
Thallium
Vanadium
Zinc
"
7.6E-07
1.2E-08
5.5E-08
5.3E-08
1.1E-07
1.2E-08
2.0E-09
"
"
7.6E-07
1.2E-08
5.5E-08
5.3E-08
1.1E-07
1.2E-08
2.0E-09
Chemical Total
-
1.0E-06
-
-
1.0E-06
Exposure Point Total
1.0E-06
Exposure K
edium Total
1.0E-06
Medium Total
5.9E-05
Sediment
Sediment
OWR
Cobalt
Nickel
Chemical Total
-
-
Exposure Point Total
Exposure K
edium Total
Medium Total
Receptor Total
Receptor Risk Total
6.1E-05
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
RAGS Part D Table 10
Risk Summary
-------
LIST OF TABLES
RAGS PART D TABLE 10
SUMMARY OF RECEPTOR RISKS AND HAZARDS FOR COPCs
Table No.
Reasonable Maximum Exposures
10.1 .RME Current Industrial Workers
1Q.2.RME Current Child Residents
10.3.RME Current Adult Residents
10.4.RME Current Lifelong Residents
10.5.RME Future Construction Workers
10.6.RME Future Industrial Workers
10.7.RME Future Child Residents
10.8.RME Future Adult Residents
10.9.RME Future Lifelong Residents
Central Tendency Exposures
10.1 .CTE Current Industrial Workers
10.2.CTE Current Child Residents
10.3.CTE Current Adult Residents
10.4.CTE Current Lifelong Residents
10.5.CTE Future Construction Workers
10.6.CTE Future Industrial Workers
10.7.CTE Future Child Residents
10.8.CTE Future Adult Residents
10.9.CTE Future Lifelong Residents
-------
TABLE 10.1.RME
RISK SUMMARY
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Current
Receptor Population: Industrial Workers
Receptor Age: Adult
Medium
Exposure
Medium
Exposure
Point
Chemical
of Potential
Concern
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Ingestion Inhalation Dermal External
(Radiation)
Exposure
Routes Total
Primary Ingestion Inhalation Dermal
Target Orqan(s)
Exposure
Routes Total
Surface Soil
Surface Soil
OWR
Arsenic
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
- I - l - l -
i - i - i - ii -
Exposure Point Total
Exposure IV
edium Total
w
Air
OWR
Arsenic
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
- i -- i - i -
i - i - i -
Exposure Point Total
Exposure Medium Total
Vledium Total
Receptor Total
Receptor Risk Total
Receptor HI Total
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 10.2.RME
RISK SUMMARY
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Child
Medium
Exposure
Medium
Exposure
Point
Chemical
of Potential
Concern
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Ingestion Inhalation Dermal External
(Radiation)
Exposure
Routes Total
Primary Ingestion Inhalation Dermal
Target Orqan(s)
Exposure
Routes Total
Surface Soil
Surface Soil
OWR
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
- I - l - l - ii
I -- I - i -- n
Exposure Point Total
li
1 -
Exposure IV
edium Total
i
n
Air
OWR I
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
SiChemical Total
-- I -- I -- I -
I -- I - I --
Exposure Point Total
Exposure Medium Total
Vledium Total
Sediment [Sediment
OWR |
All Cancer Risks Within Acceptable Lev
sis
All Hazard Quotients Within Acceptable Levels
j|Chemical Total
i - i - - i -
I - I - I -
Exposure Point Total
jj Exposure Medium Total
Vledium Total
Receptor Total
Receptor Risk Total
Receptor HI Total |
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 10.3.RME
RISK SUMMARY
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Adult
Medium
Exposure
Medium
Exposure
Point
Chemical
of Potential
Concern
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Ingestion Inhalation Dermal External
(Radiation)
Exposure
Routes Total
Primary Ingestion Inhalation Dermal
Target Orqan(s)
Exposure
Routes Total
Surface Soil
Surface Soil
OWR
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
- I - l - l -
i - i - i - ii -
Exposure Point Total
Exposure IV
edium Total
w
Air
OWR
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
- I -- I - I -
i - i - i - ii -
Exposure Point Total
Exposure Medium Total
\\
Vledium Total
j;
Surface Water [Surface Water
OWR
All Cancer Risks Within Acceptable Lev
sis
All Hazard Quotients Within Acceptable Levels
Chemical Total
i - i - - i -
i - i - i -
Exposure Point Total
Exposure Medium Total
Vledium Total
Sediment
Sediment
OWR
All Cancer Risks Within Acceptable Lev
rlS
All Hazard Quotients Within Acceptable Levels
Chemical Total
-- I - I -- I -
I -- I -- I --
Exposure Point Total
Exposure Medium Total
Vledium Total
Receptor Total
Receptor Risk Total
Receptor HI Total f
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 10.4.RME
RISK SUMMARY
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Medium
Exposure
Medium
Exposure
Point
Chemical
of Potential
Concern
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Ingestion Inhalation Dermal External
(Radiation)
Exposure
Routes Total
Primary
Target Organ(s)
Ingestion
Inhalation
Dermal
Exposure
Routes Total
Surface Soil
Surface Soil
OWR
All Cancer Risks Within Acceptable Levels
Chemical Total
-- l - l -- l
Exposure Point Total
Exposure Medium Total
Air
OWR I
All Cancer Risks Within Acceptable Leve
s
llChemical Total
- i - i - i -
Exposure Point Total
li
Exposure IV
edium Total
n
Medium Total
ii
Sediment
Sediment
OWR
All Cancer Risks Within Acceptable Levels
Chemical Total
- i - i - i - i
Exposure Point Total
Exposure Medium Total
!!
Medium Total
!!
Receptor Total
Receptor Risk Total |
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 10.5.RME
RISK SUMMARY
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Future I
Receptor Population: Construction Workers
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
Routes Total
Target Organ(s)
Routes Total
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Aluminum
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
--
-
--
-
6E-08
I - I - l -
Exposure Point Total
6E-08
Exposure Medium Total
6E-08
Air
OWR
Aluminum
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
- I - I - I -
1E-07
I - I - I -
Exposure Point Total
1E-07
Exposure Medium Total
1E-07
Medium Total
2E-07
Groundwater
Groundwater
OWR
Trichloroethene
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
jjChemical Total
-- I - I -- I
9E-08
I - I - l -
Exposure Point Total
9E-08
Exposure Medium Total
9E-08
Air
OWR
Trichloroethene
-
3E-07
-
-
3E-07
Immune, Developmental
-
3
-
3
jjChemical Total
-
3E-07
-
-
3E-07
3
3
Exposure Point Total
3E-07
3
Exposure Medium Total
3E-07
3
Medium Total
3E-07
3
ReceptorTotal
Receptor Risk Total
5E-07
Receptor HI Total
3
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 10.6.RME
RISK SUMMARY
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Future
Receptor Population: Industrial Worker
Receptor Age: Adult
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
Routes Total
Target Orqan(s)
Routes Total
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
All Cancer Risks Within A
cceptable Lev
sis
All Hazard Quotients Within Acceptable Levels
Chemical Total
--
-
--
-
-
-
-
-
Exposure Point Total
I;
i -
Exposure IV
edium Total
!!
i -
Air
OWR I
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
I'chemical Total
- I -- l - l -
1 - 1 - 1 -
Exposure Point Total
Exposure Medium Total
Medium Total
Groundwater
Groundwater
OWR
Chloroform
1E-06
-
1E-08
-
1E-06
Hepatic
0.01
0.0001
0.01
Trichloroethene
2E-06
-
4E-08
-
2E-06
Immune, Developmental
0.2
0.005
0.2
Vinyl Chloride
2E-06
»
1E-08
»
2E-06
Hepatic
0.002
0.00002
0.002
1,4-Dioxane
1E-06
1E-09
1E-06
Hepatic, Urinary
0.001
0.000001
0.001
Aluminum
Nervous
0.6
0.0004
0.6
Arsenic
7E-05
-
5E-08
-
7E-05
Dermal, CVS
0.5
0.0003
0.5
Cobalt
--
-
-
Thyroid
2
0.0006
2
Vlanqanese
--
»
»
Nervous
1
0.02
1
Chemical Total
8E-05
-
1E-07
-
8E-05
5
0.03
5
Exposure Point Total
8E-05
5
Exposure Medium Total
8E-05
5
Groundwater
Air
OWR
Chloroform
2E-06
-
-
2E-06
Hepatic
0.003
0.003
Trichloroethene
4E-07
-
-
4E-07
Immune, Developmental
0.2
0.2
Vinyl Chloride
3E-08
»
»
3E-08
Hepatic
0.0002
0.0002
1,4-Dioxane
6E-09
»
»
6E-09
Nervous, Respiratory
0.0001
0.0001
Aluminum
Nervous
Arsenic
NA
Cobalt
-
-
-
Respiratory
-
-
-
-
Manganese
--
--
--
Nervous
--
--
--
--
lohemical Total
-
3E-06
-
-
3E-06
0.2
0.2
Exposure Point Total
3E-06
0.2
Exposure IV
edium Total
3E-06
0.2
Medium Total
8E-05
5
Receptor Total
Receptor Risk Total
8E-05
Receptor HI Total
5
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 10.7.RME
RISK SUMMARY
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Child
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
Routes Total
Target Organ(s)
Routes Total
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Arsenic
4E-06
5E-07
4E-06
Dermal, CVS
0.1
0.01
0.1
Cobalt
Thyroid
0.3
0.01
0.3
Copper
GS
0.2
0.01
0.2
Iron
GS
0.4
0.01
0.4
Manganese
Nervous
0.2
0.1
0.3
Thallium
Dermal
3
0.06
3
Chemical Total
4E-06
5E-07
4E-06
4
0.2
4
Exposure Point Total
4E-06
4
Exposure Medium Total
4E-06
4
Air
OWR
Arsenic
4E-10
4E-10
NA
0.00008
0.00008
Cobalt
1E-09
1E-09
Respiratory
0.0003
0.0003
Copper
NA
Iron
NA
Vlanganese
Nervous
0.002
0.002
Thallium
NA
Chemical Total
-
2E-09
-
-
2E-09
0.003
0.003
Exposure Point Total
2E-09
0.003
Exposure Medium Total
2E-09
0.003
Vledium Total
4E-06
4
Groundwater
Groundwater
OWR
2-Hexanone
Nervous
0.4
0.01
0.4
Tetrachloroethene
6E-07
3E-07
9E-07
Nervous, Ocular
0.5
0.3
0.8
Trichloroethene (Mutagenic)
2E-06
3E-07
3E-06
NA
Trichloroethene (Nonmutageni
2E-06
2E-07
2E-06
Immune, Developmental
1
0.2
1
Vinyl Chloride
2E-05
2E-06
2E-05
Hepatic
0.009
0.0006
0.01
1,4-Dioxane
2E-06
5E-09
2E-06
Hepatic, Urinary
0.006
0.00002
0.006
Caprolactam
Developmental
0.3
0.003
0.3
Aluminum
Nervous
3
0.01
3
Arsenic
8E-05
4E-07
8E-05
Dermal, CVS
2
0.009
2
Cobalt
Thyroid
11
0.02
11
Iron
GS
3
0.01
3
Manganese
Nervous
5
0.6
6
Thallium
-
-
Dermal
3
»
0.01
3
Chemical Total
1E-04
-
3E-06
-
1E-04
29
-
1
30
Exposure Point Total
1E-04
30
Exposure IV
edium Total
1E-04
30
Vledium Total
1E-04
30
Sediment
Sediment
OWR
Chemical Total
-
-
0.0
Exposure Point Total
-
IE Exposure Medium Total
-
Vledium Total
-
Receptor Total
Receptor Risk Total
1E-04
Receptor HI Total
34
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 10.8.RME
RISK SUMMARY
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe:
Future
Receptor Population:
Residents
Receptor Aqe: Adult
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
Routes Total
Target Organ(s)
Routes Total
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Thallium
--
-
-
Dermal
0.3
0.01
0.3
Chemical Total
-
-
0.3
-
0.01
0.3
Exposure Point Total
0.3
Exposure IV
edium Total
0.3
Air
OWR
Thallium
-
-
NA
-
-
Chemical Total
-
-
0.00
0.00
Exposure Point Total
0.00
Exposure Medium Total
0.00
Medium Total
0.27
Groundwater
Groundwater
OWR
2-Hexanone
--
-
-
Nervous
0.2
0.008
0.3
Chloroform
2E-06
-
1E-07
-
3E-06
Hepatic
0.03
0.001
0.03
Tetrachloroethene
1E-06
»
4E-07
»
2E-06
Nervous, Ocular
0.3
0.1
0.4
Trichloroethene (Mutagenic)
2E-06
2E-07
2E-06
NA
Trichloroethene (Nonmutageni
3E-06
3E-07
4E-06
Immune, Developmental
0.6
0.1
0.7
Vinyl Chloride
4E-06
1E-07
4E-06
Hepatic
0.006
0.0002
0.006
1,4-Dioxane
3E-06
1E-08
3E-06
Hepatic, Urinary
0.004
0.00001
0.004
Aluminum
Nervous
2
0.010
2
Arsenic
2E-04
9E-07
2E-04
Dermal, CVS
1
0.007
1
Cobalt
Thyroid
6
0.01
6
Iron
GS
2
0.01
2
Vlanganese
Nervous
3
0.4
4
Vlercury
Immune, Urinary
0.01
0.001
0.01
Thallium
-
Dermal
2
0.009
2
Chemical Total
2E-04
-
2E-06
-
2E-04
17
1
18
Exposure Point Total
2E-04
18
Exposure Medium Total
2E-04
18
Groundwater
Air
OWR
2-Hexanone
-
-
-
Nervous
-
0.3
-
0.3
Chloroform
3E-05
-
3E-05
Hepatic
0.05
0.05
Tetrachloroethene
2E-06
2E-06
Nervous, Ocular
0.8
0.8
Trichloroethene (Mutagenic)
3E-06
3E-06
NA
Trichloroethene (Nonmutageni
5E-06
5E-06
Hepatic, Urinary
3
3
Vinyl Chloride
5E-07
5E-07
Hepatic
0.004
0.004
1,4-Dioxane
9E-08
9E-08
Nervous, Respiratory
0.002
0.002
Aluminum
Nervous
Arsenic
NA
Cobalt
Respiratory
Iron
»
»
NA
Manganese
»
»
Nervous
Thallium
-
-
NA
-
-
Chemical Total
4E-05
-
-
4E-05
4
4
Exposure Point Total
4E-05
4
Exposure Medium Total
4E-05
4
Vledium Total
2E-04
22
Sediment
Sediment
OWR
Cobalt
-
-
Thyroid
0.01
-
0.00
0.01
Chemical Total
-
-
0.01
-
0.00
0.01
Exposure Point Total
0.01
H Exposure IV
edium Total
0.01
Vledium Total
0.01
Receptor Total
Receptor Risk Total
2E-04
Receptor HI Total
22
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 10.9. RME
RISK SUMMARY
REASONABLE MAXIMUM EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Medium
Exposure
Medium
Exposure
Point
Chemical
of Potential
Concern
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Ingestion
Inhalation
Dermal
External
(Radiation)
Exposure
Routes Total
Primary
Target Organ(s)
Ingestion
Inhalation
Dermal
Exposure
Routes Total
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Arsenic
5E-06
-
7E-07
-
6E-06
Chemical Total
5E-06
-
7E-07
-
6E-06
Exposure Point Total
6E-06
Exposure Medium Total
6E-06
Air
OWR
Arsenic
-
-
-
2E-09
Chemical Total
-
2E-09
-
-
2E-09
Exposure Point Total
2E-09
Exposure Medium Total
2E-09
Medium Total
6E-06
Groundwater
Groundwater
Chloroform
Tetrachloroethene
Trichloroethene (Mutagenic)
Trichloroethene (Nonmutagenic)
Vinyl Chloride
1,4-Dioxane
Bis(2-ethylh exyl )phthalate
Arsenic
2E-06
4E-06
5E-06
3E-05
5E-06
2E-06
2E-04
"
7E-07
5E-07
6E-07
2E-06
2E-08
1E-06
4E-06
3E-06
4E-06
6E-06
3E-05
5E-06
2E-06
2E-04
Chemical Total
3E-04
-
5E-06
-
3E-04
Exposure Point Total
3E-04
Exposure Medium Total
3E-04
Groundwater
Air
OWR
Chloroform
Tetrachloroethene
Trichloroethene (Mutagenic)
Trichloroethene (Nonmutagenic)
Vinyl Chloride
1,4-Dioxane
Bis(2-ethylh exyl )phthalate
Arsenic
"
3E-05
2E-06
3E-06
5E-06
5E-07
9E-08
"
"
3E-05
2E-06
3E-06
5E-06
5E-07
9E-08
Chemical Total
-
4E-05
-
-
4E-05
Exposure Point Total
4E-05
Exposure Medium Total
4E-05
Medium Total
3E-04
Sediment
Sediment
OWR
All Cancer Risks Within Acceptable Levels
Chemical Total
I I I -
Exposure Point Total
Exposure Medium Total
Medium Total
Receptor Total Receptor Risk Total | 3E-04
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 10.1.CTE
RISK SUMMARY
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Current
Receptor Population: Industrial Workers
Receptor Age: Adult
Medium
Exposure
Medium
Exposure
Point
Chemical
of Potential
Concern
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Ingestion Inhalation Dermal External
(Radiation)
Exposure
Routes Total
Primary Ingestion Inhalation Dermal
Target Orqan(s)
Exposure
Routes Total
Surface Soil
Surface Soil
OWR
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
- I - l - l -
[-[-[-
Exposure Point Total
Exposure IV
edium Total
Air
OWR
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
- I -- l - l -
I - I - I -
Exposure Point Total
Exposure Medium Total
Vledium Total
Receptor Total
Receptor Risk Total
Receptor HI Total
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 10.2.CTE
RISK SUMMARY
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Child
Medium
Exposure
Medium
Exposure
Point
Chemical
of Potential
Concern
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Ingestion Inhalation Dermal External
(Radiation)
Exposure
Routes Total
Primary Ingestion Inhalation Dermal
Target Orqan(s)
Exposure
Routes Total
Surface Soil
Surface Soil
OWR
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
- I - l - l -
i - i - i - ii -
Exposure Point Total
Exposure IV
edium Total
|
Air
OWR
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
-- l - l -- l -
1 - 1 - 1 -
Exposure Point Total
Exposure Medium Total
Vledium Total
Sediment jSediment
OWR
All Cancer Risks Within Acceptable Lev
;ls
All Hazard Quotients Within Acceptable Levels
Chemical Total
- i - i - i -
1 - 1 - 1 -
Exposure Point Total
Exposure Medium Total
Vledium Total
Receptor Total
Receptor Risk Total
Receptor HI Total
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 10.3.CTE
RISK SUMMARY
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Adult
Medium
Exposure
Medium
Exposure
Point
Chemical
of Potential
Concern
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Ingestion Inhalation Dermal External
(Radiation)
Exposure
Routes Total
Primary Ingestion Inhalation Dermal
Target Orqan(s)
Exposure
Routes Total
Surface Soil
Surface Soil
OWR
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
- I - l - l -
i - i - i - ii -
Exposure Point Total
Exposure IV
edium Total
w
Air
OWR
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
- I -- I - I -
I - I - I -
Exposure Point Total
Exposure Medium Total
Vledium Total
Sediment [Sediment
OWR
All Cancer Risks Within Acceptable Lev
sis
All Hazard Quotients Within Acceptable Levels
Chemical Total
-- I - I -- I -
i - i - i -
Exposure Point Total
Exposure Medium Total
Vledium Total
Receptor Total
Receptor Risk Total
Receptor HI Total
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 10.4.CTE
RISK SUMMARY
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Current
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Medium
Exposure
Medium
Exposure
Point
Chemical
of Potential
Concern
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Ingestion Inhalation Dermal External
(Radiation)
Exposure
Routes Total
Primary
Target Organ(s)
Ingestion
Inhalation
Dermal
Exposure
Routes Total
Surface Soil
Surface Soil
OWR
All Cancer Risks Within Acceptable Levels
Chemical Total
- I - l - l -
Exposure Point Total
Exposure IV
edium Total
Air
OWR
All Cancer Risks Within Acceptable Levels
Chemical Total
- I -- I - I -
Exposure Point Total
Exposure Medium Total
Vledium Total
Sediment [Sediment
OWR
Cobalt
All Cancer Risks Within Acceptable Lev
sis
Chemical Total
-- I - I -- I -
Exposure Point Total
Exposure Medium Total
Vledium Total
Receptor Total
Receptor Risk Total
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 10.5.CTE
RISK SUMMARY
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
[Scenario Timeframe: Future I
Receptor Population: Construction Workers
Medium
Exposure
Medium
Exposure
Point
Chemical
of Potential
Concern
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Ingestion Inhalation Dermal External
(Radiation)
Exposure
Routes Total
Primary Ingestion Inhalation Dermal
Target Organ(s)
Exposure
Routes Total
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
- I - I - I -
I - I - I -
Exposure Point Total
Exposure Medium Total
Air
OWR
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
- I - I - I . i
I - I - I -
Exposure Point Total
Exposure Medium Total
II
Medium Total
II
Groundwater
Groundwater
OWR
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
-- I - I -- I -
I -- I -- I --
Exposure Point Total
Exposure Medium Total
Groundwater
Air
OWR
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
- I -- I - I -
I -- I -- I --
Exposure Point Total
Exposure Medium Total
Medium Total
--
ReceptorTotal Receptor RiskTotal |
Receptor HI Total ( -- |
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 10.6.CTE
RISK SUMMARY
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Future
Receptor Population: Industrial Worker
Receptor Age: Adult
Medium
Exposure
Medium
Exposure
Point
Chemical
of Potential
Concern
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Ingestion Inhalation Dermal External
(Radiation)
Exposure
Routes Total
Primary Ingestion Inhalation Dermal
Target Orqan(s)
Exposure
Routes Total
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
- I - l - l -
i - i - i - ii -
Exposure Point Total
Exposure IV
edium Total
|
Air
OWR
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
- I -- l - l -
1 - 1 - 1 -
-
Exposure Point Total
Exposure Medium Total
Medium Total
Groundwater
Groundwater
OWR
All Cancer Risks Within Acceptable Lev
sis
All Hazard Quotients Within Acceptable Levels
Chemical Total
- i - i - i -
1 - 1 - 1 -
Exposure Point Total
Exposure Medium Total
-
Groundwater
Air
OWR
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
- I - I - I -
| -- I 0.00 1 --
-
Exposure Point Total
-
Exposure IV
edium Total
-
Medium Total
-
Receptor Total
Receptor Risk Total
Receptor HI Total
--
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 10.7.CTE
RISK SUMMARY
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Child
Medium
Exposure
Medium
Exposure
Point
Chemical
of Potential
Concern
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Ingestion
Inhalation
Dermal
External
(Radiation)
Exposure
Routes Total
Primary
Tarqet Orqan(s)
Ingestion
Inhalation
Dermal
Exposure
Routes Total
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
Thallium
Dermal
0.9
0.01
0.9
Chemical Total
-
-
0.9
-
0.01
1
Exposure Point Total
1
Exposure IV
edium Total
1
Air
OWR
Thallium
-
-
NA
-
Chemical Total
-
-
-
Exposure Point Total
-
Exposure Medium Total
-
Vledium Total
1
Groundwater
Groundwater
OWR
2-Hexanone
Tetrachloroethene
Vinyl Chloride
Aluminum
Arsenic
Cobalt
Iron
Manganese
Thallium
1E-07
1E-05
2E-05
-
8E-08
1E-06
7E-08
2E-07
1E-05
2E-05
Nervous
Nervous, Ocular
Hepatic
Nervous
Dermal, CVS
Thyroid
GS
Nervous
Derm al
0.2
0.2
0.004
1
0.8
4
1
2
1
0.008
0.1
0.0003
0.005
0.004
0.008
0.006
0.2
0.005
0.2
0.4
0.004
1
0.8
4
1
2
1
Chemical Total
3E-05
-
1E-06
-
3E-05
11
-
0.4
11
Exposure Point Total
3E-05
11
Exposure IV
edium Total
3E-05
11
Vledium Total
3E-05
11
Sediment
Sediment
OWR
Cobalt
-
-
All Hazard Quotients Within Acceptable Levels
Chemical Total
-
-
I - I - I -
-
Exposure Point Total
-
Exposure Medium Total
-
Vledium Total
-
Receptor Total
Receptor Risk Total
3E-05
Receptor HI Total
11
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 10.8.CTE
RISK SUMMARY
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
[Scenario Timeframe: Future I
Receptor Population: Residents
Medium
Exposure
Medium
Exposure
Point
Chemical
of Potential
Concern
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Ingestion
Inhalation
Dermal
External
(Radiation)
Exposure
Routes Total
Primary
Target Organ(s)
Ingestion
Inhalation
Dermal
Exposure
Routes Total
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
I - i -- i - it
I - I - I -
Exposure Point Total
I
Exposure Medium Total
ii
Air
OWR
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
- I - I - I -
I - I - I -
Exposure Point Total
Exposure Medium Total
Medium Total
Groundwater
Groundwater
OWR
Tetrachloroethene
Aluminum
Cobalt
Manganese
2E-07
"
8E-08
"
2E-07
Nervous, Ocular
Nervous
Thyroid
Nervous
0.1
0.6
2
1
"
0.05
0.002
0.003
0.1
0.2
0.6
2
1
Chemical Total
2E-07
8E-08
-
2E-07
4
-
0.2
4
Exposure Point Total
2E-07
4
Exposure Medium Total
2E-07
4
Groundwater
Air
OWR
Tetrachloroethene
Aluminum
Cobalt
Manganese
"
5E-08
"
"
5E-08
Nervous, Ocular
Nervous
Respiratory
Nervous
"
0.04
"
0.04
Chemical Total
-
5E-08
-
-
5E-08
0.04
0.04
Exposure Point Total
5E-08
0.04
Exposure Medium Total
5E-08
0.04
Medium Total
3E-07
4
Surface Water
Surface Water
OWR
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
I - I I -
I -- I - I
Exposure Point Total
Exposure Medium Total
Medium Total
Sediment
Sediment
OWR
All Cancer Risks Within Acceptable Levels
All Hazard Quotients Within Acceptable Levels
Chemical Total
I - I I -
I -- I - I
Exposure Point Total
Exposure Medium Total
Medium Total
ReceptorTotal Receptor Risk Total | 3E-07
Receptor HI Total ( 4
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
TABLE 10.9.CTE
RISK SUMMARY
CENTRAL TENDENCY EXPOSURES
OLD WILMINGTON ROAD SITE
PAGE 1 OF 1
Scenario Timeframe: Future
Receptor Population: Residents
Receptor Age: Lifelong (Child and Adult)
Medium
Exposure
Exposure
Chemical
Carcinogenic Risk
Non-Carcinogenic Hazard Quotient
Medium
Point
of Potential
Concern
Ingestion
Inhalation
Dermal
External
Exposure
Primary
Ingestion
Inhalation
Dermal
Exposure
(Radiation)
Routes Total
Target Organ(s)
Routes Total
Surface/Subsurface Soil
Surface/Subsurface Soil
OWR
All Cancer Risks Within Acceptable Levels
Chemical Total
| .. | .. | .. Ij
Exposure Point Total
II
Exposure Medium Total
II
Air
OWR
All Cancer Risks Within Acceptable Levels
Chemical Total
-
--
-
-
Exposure Point Total
Exposure Medium Total
ii
Medium Total
»
Groundwater
Groundwater
OWR
All Cancer Risks Within Acceptable Levels
I
Chemical Total
- I - I - I -
Exposure Point Total
Exposure Medium Total
Groundwater
Air
OWR
All Cancer Risks Within Acceptable Levels
jjChemical total
- I -- I - I -
Exposure Point Total
Exposure Medium Total
Medium Total
ii
Surface Water
Surface Water
OWR
All Cancer Risks Within Acceptable Levels
Chemical Total
--
-
--
-
1 1
Exposure Point Total
Exposure Medium Total
Medium Total
Sediment
Sediment
OWR
Cobalt
-
-
Chemical Total
-
- 1
Exposure Point Total
Exposure Medium Total
II
Medium Total
II
ReceptorTotal
Receptor Risk Total
Notes:
1 - Mutagenic chemicals were evaluated in accordance with USEPA's Supplemental Guidance for Assessing Susceptibility from Early-Life Exposure to Carcinogens (2005).
-------
APPENDIX G
PADEPCONCURRENCE LETTER
54
-------
Pennsylvania
DEPARTMENT OF ENVIRONMENTAL
PROTECTION
April 5, 2023
Mr, Paul Leonard, Director
Superfund and Emergency Management Division
U.S, Environmental Protection Agency, Region III
4 Penn Center
1600 John F, Kennedy Blvd.
Mail Code; 3SD21
Philadelphia, PA 19103
Re: Interim Record of Decision (ROD)
Old Wilmington Road Superfund Site
West Cain Township, Chester County
Dear Mr. Leonard:
The Department of Environmental Protection (DEP) has received and reviewed the draft Interim
Record of Decision (ROD) dated March 28, 2023 for the Old Wilmington Road Superfund Site
in West Cain Township, Chester County. This ROD presents the selected remedial action for
Operable Unit 1, which addresses three inter-connected plumes of contaminated groundwater
pose a threat to public health through ingestion and inhalation exposure. The plumes consist of
tetrachloroethene (PCE), trichloroethene (TCE), and 1,4-Dioxane. The area of concern (AOC)
includes properties impacted or potentially impacted by these contaminants of concern (COC).
The selected remedy for Operable Unit 1 includes the following major components:
• The installation of a newly constructed public waterline and offering to connect all
properties within the AOC;
• Offer to provide Vapor Intrusion mitigation systems at residences where COC
concentrations in indoor air are detected at levels exceeding cleanup levels for Vapor
Intrusion;
• Long-term monitoring of the installed Vapor Intrusion mitigation systems to assess the
effectiveness of the systems; and
• Implementation of Institutional Controls (ICs) to prevent exposure to Site-related
contaminants in groundwater by deterring the use of untreated groundwater at properties
within the AOC, to restrict any impact on the Selected Remedy, and to prevent exposure
to Site-related COCs via Vapor Intrusion through a notification and reporting process
relating to new construction in potentially affected areas.
DEP hereby concurs with EPA's proposed remedy with the following conditions:
• DEP will be given the opportunity to review and comment on documents and provide
meaningful input regarding decisions related to the design and implementation of the
Southeast Regional Office
2 East Main Street | Norristown, PA 19401-4915 | 484.250.5980 [ Fax 484,250.5981 [ www.dep.pa.gov
-------
Mr. Paul Leonard, Director
- 2 -
April 5, 2023
remedial action, to assure compliance with Pennsylvania's applicable or relevant and
appropriate requirements (ARARs) and to be considered (TBC) requirements.
• DEP will be given the opportunity to review and comment on documents and provide
meaningful input regarding decisions regarding the ICs, including on which parcels ICs
are required. ICs that implement the Activity and Use Limitations (AULs) may be in the
form of Environmental Covenants (ECs), pursuant the Section 6517(a)(1) of the
Pennsylvania Uniform Environmental Covenants Act (UECA), 27 Pa.C.S. § 6517(a)(1)
or Administrative Orders issued under Section 512(a) of HSCA. When ECs are
implemented, they will need to comply with Section 6517(a)(1) of the UECA, 27 Pa.C.S,
§ 6517(a)(1). In cases where property owners refuse to execute an EC, at EPA's request,
DEP may issue an Administrative Order under Section 512(a) of HSCA, to implement
such restrictions directly. Section 512(a) states that "[a] site at which hazardous
substances remain after completion of a response action shall not be put to a use which
would disturb or be inconsistent with the response action implemented."
• DEP will have the opportunity to review and comment before any modification to the
ROD in the form of an Amendment or an Explanation of Significant Differences.
• State cost share atid Operation and Maintenance obligations will be further
clarified during design of the remedy and the completion of a Superfund State
• EPA will assure that DEP is provided an opportunity to fully participate in any
negotiations with responsible parties.
• DEP reserves the right and responsibility to. take independent enforcement actions
pursuant to state law.
Thank you for the opportunity to comment and concur on this EPA ROD. If you have any
questions regarding this matter, please do not hesitate to contact me.
Sii
Patrick L. Patterson
Regional Director
Southeast Regional Office
cc: Ms. Shandruk, EPA Region III (electronic)
West Cain Township
Chester County Health Department
Mr. R. Patel (electronic)
Ms, McClennen (electronic)
Ms. Wagner (electronic)
Mr. Cheny (electronic)
Ms, C. McCarthy (electronic)
Re
Contract.
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