ILLINOIS POLLUTION CONTROL BOARD
December 4, 1997
IN THE MATTER OF:
TIERED APPROACH TO
CORRECTIVE ACTION
OBJECTIVES: AMENDMENTS
TO 35 ILL. ADM. CODE 742
)
)
)
)
)
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R97-12(B)
R97-12(C)
(Rulemaking - Land)
Proposed Rule. First Notice.
OPINION AND ORDER OF THE BOARD (by M. McFawn, J. Yi):
The Board today opens a Docket C in this rulemaking, Tiered Approach to Corrective
Action Objectives (also known as TACO), to amend certain sections of 35 Ill. Adm. Code
742. On December 3, 1997, in Docket R-97-12(B), the Site Remediation Advisory Committee
(SRAC) and the Illinois Environmental Protection Agency (Agency), filed a “Joint Motion to
Correct” (joint motion) Appendix A.Table H entitled “Chemicals Whose Tier 1 Class I
Groundwater Remediation Objective Exceeds the 1 in 1,000,000 Cancer Risk Concentration”
(Table H). In their joint motion, the SRAC and the Agency request that the Board make a
correction to Table H at final notice under Docket B of this rulemaking.
At this point in the R97-12 rulemaking process, the Illinois Administrative Procedure
Act (APA) does not provide for the expeditious correction of Table H. See 4 ILCS 5/-
40(c),(d) (1994). Accordingly, today the Board adopted Docket B as final and ordered the
rules filed with the Secretary of State, as those rules were submitted to JCAR for second notice
review. See In the Matter of: Tiered Approach to Corrective Action Objectives:
Amendments to Part 742 (December 4, 1997), R97-12(B). The purpose of this new docket is
to consider the merits of the joint motion and evidence in support thereof. The joint motion
filed in Docket B is hereby incorporated as public comment 1. The Board also on its own
motion proposes to amend additional sections in Part 742 in order to make some non-
substantive grammatical, typographical, and mechanical changes that were identified after the
adoption of Docket A in this rulemaking.
In their joint motion, the SRAC and the Agency assert that, upon reviewing the
numeric contaminant levels set forth under the 1 in 1,000,000 cancer risk concentration
included within in Table H, they have concluded that the numeric contaminant levels are based
on a 70-year exposure duration. The SRAC and the Agency further maintain that the use of a
70-year exposure duration, rather than a 30-year exposure duration, as a basis for the Table H
levels was not intended. Finally, the SRAC and the Agency contend that the use of the 70-
year exposure duration as a basis for the Table H levels is technically inconsistent with other
aspects of 35 Ill. Adm. Code 742, which are based on a 30-year exposure duration.
The Board today adopts the following first notice order under the APA (5 ILCS 100/5-
5
et seq.
(1996)) without commenting on the merits of the Table H portion of the proposal.
2
This proposal will be published in the
Illinois Register
whereupon a 45-day comment period
shall begin. The Board asks that parties interested in commenting on this proposal address
their written comments to Amy Muran Felton, the hearing officer assigned to this matter.
Additionally, the Board presently intends to schedule and hold a hearing in this Docket
C. The Board expects the SRAC and the Agency to present a justification for their proposed
amendment, as the present record does not contain discussion of the proposed 30-year
exposure duration.
Copies of this opinion, the proposed rules, and any hearing officer orders may be
viewed and downloaded from the Board’s Web site at http://www.ipcb.state.il.us/. Copies
may also be requested from the Clerk of the Illinois Pollution Control Board, James R.
Thompson Center, 100 West Randolph, Suite 11-500, Chicago, Illinois 60601 (312-814-
3461).
ORDER
The Board directs the Clerk to cause the filing of the following proposed amendments
with the Secretary of State for first notice publication in the
Illinois Register.
TITLE 35: ENVIRONMENTAL PROTECTION
SUBTITLE G: WASTE DISPOSAL
CHAPTER I: POLLUTION CONTROL BOARD
SUBCHAPTER f: RISK BASED CLEANUP OBJECTIVES
PART 742
TIERED APPROACH TO CORRECTIVE ACTION OBJECTIVES
SUBPART A: INTRODUCTION
Section
742.100
Intent and Purpose
742.105
Applicability
742.110
Overview of Tiered Approach
742.115
Key Elements
742.120
Site Characterization
SUBPART B: GENERAL
Section
742.200
Definitions
742.205
Severability
742.210
Incorporations by Reference
742.215
Determination of Soil Attenuation Capacity
742.220
Determination of Soil Saturation Limit
742.225
Demonstration of Compliance with Remediation Objectives
742.230
Agency Review and Approval
3
SUBPART C: EXPOSURE ROUTE EVALUATIONS
Section
742.300
Exclusion of Exposure Route
742.305
Contaminant Source and Free Product Determination
742.310
Inhalation Exposure Route
742.315
Soil Ingestion Exposure Route
742.320
Groundwater Ingestion Exposure Route
SUBPART D: DETERMINING AREA BACKGROUND
Section
742.400
Area Background
742.405
Determination of Area Background for Soil
742.410
Determination of Area Background for Groundwater
742.415
Use of Area Background Concentrations
SUBPART E: TIER 1 EVALUATION
Section
742.500
Tier 1 Evaluation Overview
742.505
Tier 1 Soil and Groundwater Remediation Objectives
742.510
Tier 1 Remediation Objectives
SUBPART F: TIER 2 GENERAL EVALUATION
Section
742.600
Tier 2 Evaluation Overview
742.605
Land Use
742.610
Chemical and Site Properties
SUBPART G: TIER 2 SOIL EVALUATION
Section
742.700
Tier 2 Soil Evaluation Overview
742.705
Parameters for Soil Remediation Objective Equations
742.710
SSL Soil Equations
742.715
RBCA Soil Equations
742.720
Chemicals with Cumulative Noncarcinogenic Effects
SUBPART H: TIER 2 GROUNDWATER EVALUATION
Section
742.800
Tier 2 Groundwater Evaluation Overview
742.805
Tier 2 Groundwater Remediation Objectives
742.810
Calculations to Predict Impacts from Remaining Groundwater Contamination
4
SUBPART I: TIER 3 EVALUATION
Section
742.900
Tier 3 Evaluation Overview
742.905
Modifications of Parameters
742.910
Alternative Models
742.915
Formal Risk Assessments
742.920
Impractical Remediation
742.925
Exposure Routes
742.930
Derivation of Toxicological Data
SUBPART J: INSTITUTIONAL CONTROLS
Section
742.1000
Institutional Controls
742.1005
No Further Remediation Letters
742.1010
Restrictive Covenants, Deed Restrictions and Negative Easements
742.1015
Ordinances
742.1020
Highway Authority Agreements
SUBPART K: ENGINEERED BARRIERS
Section
742.1100
Engineered Barriers
742.1105
Engineered Barrier Requirements
APPENDIX A
General
ILLUSTRATION A
Developing Soil Remediation Objectives Under the Tiered
Approach
ILLUSTRATION B
Developing Groundwater Remediation Objectives Under the
Tiered Approach
Table A
Soil Saturation Limits (C
sat
) for Chemicals Whose Melting Point is Less
Than 30
0
C
Table B
Tolerance Factor (K)
Table C
Coefficients {A
N-I+1
} for W Test of Normality, for N=2(1)50
Table D
Percentage Points of the W Test for N=3(1)50
Table E
Similar-Acting Noncarcinogenic Chemicals
Table F
Similar-Acting Carcinogenic Chemicals
Table G
Concentrations of Inorganic Chemicals in Background Soils
Table H
Chemicals Whose Tier 1 Class I Groundwater Remediation Objective
Exceeds the 1 in 1,000,000 Cancer Risk Concentration
APPENDIX B
Tier 1 Tables and Illustrations
ILLUSTRATION A
Tier 1 Evaluation
Table A
Tier 1 Soil Remediation Objectives for Residential Properties
Table B
Tier 1 Soil Remediation Objectives for Industrial/Commercial Properties
5
Table C
pH Specific Soil Remediation Objectives for Inorganics and Ionizing
Organics for the Soil Component of the Groundwater Ingestion Route
(Class I Groundwater)
Table D
pH Specific Soil Remediation Objectives for Inorganics and Ionizing
Organics for the Soil Component of the Groundwater Ingestion Route
(Class II Groundwater)
Table E
Tier 1 Groundwater Remediation Objectives for the Groundwater
Component of the Groundwater Ingestion Route
Table F
Values Used to Calculate the Tier 1 Soil Remediation Objectives for the
Soil Component of the Groundwater Ingestion Route
APPENDIX C
Tier 2 Tables and Illustrations
ILLUSTRATION A
Tier 2 Evaluation for Soil
ILLUSTRATION B
Tier 2 Evaluation for Groundwater
ILLUSTRATION C
US Department of Agriculture Soil Texture Classification
Table A
SSL Equations
Table B
SSL Parameters
Table C
RBCA Equations
Table D
RBCA Parameters
Table E
Default Physical and Chemical Parameters
Table F
Methods for Determining Physical Soil Parameters
Table G
Error Function (erf)
Table H
Q/C Values by Source Area
Table I
K
[oc]
Values for Ionizing Organics as a Function of pH (cm(3)/g or L/kg)
Table J
Values to be Substituted for k
s
When Evaluating Inorganics as a Function
of pH (cm(3)[water]/g[soil])
Table K
Parameter Estimates for Calculating Water-Filled Soil Porosity (
θ
w
)
AUTHORITY: Implementing Sections 22.4, 22.12, Title XVI, and Title XVII and authorized
by Sections 27, 57.14, and 58.5 of the Environmental Protection Act [415 ILCS 5/22.4,
22.12, 27, 57.14 and 58.5 and Title XVI and Title XVII].
Source: Adopted at 21 Ill. Reg. 7942, effective July 1, 1997, amended at 21 Ill. Reg.
__________________, effective __________________; amended at _____ Ill. Reg.
________________, effective ________________________.
NOTE: Capitalization indicates statutory language.
SUBPART B: GENERAL
Section 742.210
Incorporations by Reference
a)
The Board incorporates the following material by reference:
ASTM. American Society for Testing and Materials, 1916 Race Street,
Philadelphia, PA 19103 (215) 299-5400
6
ASTM D 2974-87, Standard Test Methods for Moisture, Ash and Organic
Matter of Peat and Other Organic Soils, approved May 29, 1987
(reapproved 1995).
ASTM D 2488-93, Standard Practice for Description and Identification of
Soils (Visual-Manual Procedure), approved September 15, 1993.
ASTM D 1556-90, Standard Test Method for Density and Unit Weight of
Soil in Place by the Sand-Cone Method, approved June 29, 1990.
ASTM D 2167-94, Standard Test Method for Density and Unit Weight of
Soil in Place by the Rubber Balloon Method, approved March 15, 1994.
ASTM D 2922-91, Standard Test Methods for Density of Soil and Soil-
Aggregate in Place by Nuclear Methods (Shallow Depth), approved
December 23, 1991.
ASTM D 2937-94, Standard Test Method for Density of Soil in Place by
the Drive-Cylinder Method, approved June 15, 1994.
ASTM D 854-92, Standard Test Method for Specific Gravity of Soils,
approved November 15, 1992.
ASTM D 2216-92, Standard Method for Laboratory Determination of
Water (Moisture) Content of Soil and Rock, approved June 15, 1992.
ASTM D 4959-89, Standard Test Method for Determination of Water
(Moisture) Content of Soil by Direct Heating Method, approved June 30,
1989 (reapproved 1994).
ASTM D 4643-93, Standard Test Method for Determination of Water
(Moisture) Content of Soil by the Microwave Oven Method, approved July
15, 1993.
ASTM D 5084-90, Standard Test Method for Measurement of Hydraulic
Conductivity of Saturated Porous Materials Using a Flexible Wall
Permeameter, approved June 29, 1990.
ASTM D 422-63, Standard Test Method for Particle-Size Analysis of
Soils, approved November 21, 1963 (reapproved 1990).
ASTM D 1140-92, Standard Test Method for Amount of Material in Soils
Finer than the No. 200 (75
μ
m) Sieve, approved November 15, 1992.
ASTM D 3017-88, Standard Test Method for Water Content of Soil and
Rock in Place by Nuclear Methods (Shallow Depth), approved May 27,
1988.
7
ASTM D 4525-90, Standard Test Method for Permeability of Rocks by
Flowing Air, approved May 25, 1990.
ASTM D 2487-93, Standard Test Method for Classification of Soils for
Engineering Purposes, approved September 15, 1993.
ASTM E 1527-93, Standard Practice for Environmental Site Assessments:
Phase I Environmental Site Assessment Process, approved March 15,
1993. Vol. 11.04.
ASTM E 1739-95, Standard Guide for Risk-Based Corrective Action
Applied at Petroleum Release Sites, approved September 10, 1995.
Barnes, Donald G. and Dourson, Michael. (1988). Reference Dose (RfD):
Description and Use in Health Risk Assessments.
Regulatory Toxicology and
Pharmacology
. 8, 471-486.
GPO. Superintendent of Documents, U.S. Government Printing Office,
Washington, DC 20401, (202) 783-3238.
USEPA Guidelines for Carcinogenic Risk Assessment, 51 Fed. Reg.
33992-34003 (September 24, 1986).
"Test Methods for Evaluating Solid Waste, Physical/Chemical Methods,",
USEPA Publication number SW-846 (Third Edition, November 1986), as
amended by Updates I and IIA (Document No. 955-001-00000-1)(contact
USEPA, Office of Solid Waste, for Update IIA).
"Methods for the Determination of Organic Compounds in Drinking
Water", EPA Publication No. EPA/600/4-88/039 (December 1988
(Revised July 1991)).
"Methods for the Determination of Organic Compounds in Drinking Water,
Supplement II", EPA Publication No. EPA/600/R-92/129 (August 1992).
"Methods for the Determination of Organic Compounds in Drinking Water,
Supplement III", EPA Publication No. EPA/600/R-95/131 (August 1995).
IRIS. Integrated Risk Information System, National Center for Environmental
Assessment, U.S. Environmental Protection Agency, 26 West Martin Luther King
Drive, MS-190, Cincinnati, OH 45268. (513) 569-7254.
"Reference Dose (RfD): Description and Use in Health Risk
Assessments", Background Document 1A (March 15, 1993).
8
"EPA Approach for Assessing the Risks Associated with Chronic
Exposures to Carcinogens", Background Document 2 (January 17, 1992).
Nelson, D.W., and L.E. Sommers. 1982. Total carbon, organic carbon, and
organic matter. In: A.L. Page (ed.),
Methods of Soil Analysis. Part 2. Chemical
and Microbiological Properties. 2nd Edition
, pp. 539-579, American Society of
Agronomy. Madison, WI.
NTIS. National Technical Information Service, 5285 Port Royal Road,
Springfield, VA 22161, (703) 487-4600.
"Dermal Exposure Assessment: Principles and Applications", EPA
Publication No. EPA/600/8-91/011B (January 1992).
"Exposure Factors Handbook", EPA Publication No. EPA/600/8-89/043
(July 1989).
"Risk Assessment Guidance for Superfund, Vol. I; Human Health
Evaluation Manual, Supplemental Guidance: Standard Default Exposure
Factors", OSWER Directive 9285.6-03 (March 1991).
“Rapid Assessment of Exposure to Particulate Emissions from Surface
Contamination Sites,” EPA Publication No. EPA/600/8-85/002 (February
1985), PB 85-192219.
"Risk Assessment Guidance for Superfund, Volume I; Human Health
Evaluation Manual (Part A)", Interim Final, EPA Publication No.
EPA/540/1-89/002 (December 1989).
"Risk Assessment Guidance for Superfund, Volume I; Human Health
Evaluation Manual, Supplemental Guidance, Dermal Risk Assessment
Interim Guidance", Draft (August 18, 1992).
"Soil Screening Guidance: Technical Background Document", EPA
Publication No. EPA/540/R-95/128, PB96-963502 (May 1996).
"Soil Screening Guidance: User's Guide", EPA Publication No.
EPA/540/R-96/018, PB96-963505 (April 1996).
"Superfund Exposure Assessment Manual", EPA Publication No.
EPA/540/1-88/001 (April 1988).
RCRA Facility Investigation Guidance, Interim Final, developed by USEPA (EPA
530/SW-89-031), 4 volumes (May 1989).
9
b)
CFR (Code of Federal Regulations). Available from the Superintendent of
Documents, U.S. Government Printing Office, Washington, D.C. 20402 (202)
783-3238:
40 CFR 761.120 (1993).
c)
This Section incorporates no later editions or amendments.
Source: Amended at ________ Ill. Reg. _____________, effective ___________________.
SUBPART C: EXPOSURE ROUTE EVALUATIONS
Section 742.310
Inhalation Exposure Route
The inhalation exposure route may be excluded from consideration if:
a)
The requirements of Sections 742.300 and 742.305 are met; and
b)
An institutional control, in accordance with Subpart J, is in place that meets the
following requirements:
1)
Either:
A)
The concentration of any contaminant of concern within ten feet of
the land surface or within ten feet of any man-made pathway shall
not exceed the Tier 1 remediation objective under Subpart E for the
inhalation exposure route; or
B)
An engineered barrier, as set forth in Subpart K and approved by
the Agency, is in place; and
2)
Requires safety precautions for the construction worker if the Tier 1
construction worker remediation objectives are exceeded.
Source: Amended at ______ Ill. Reg. ___________, effective, ___________________.
SUBPART D: DETERMINING AREA BACKGROUND
Section 742.415
Use of Area Background Concentrations
a)
A person may request that area background concentrations determined pursuant to
Sections 742.405 and 742.410 be used according to the provisions of subsection
(b) of this Section. Such request shall address the following:
1)
The natural or man-made pathways of any suspected off-site contamination
reaching the site;
10
2)
Physical and chemical properties of suspected off-site contaminants of
concern reaching the site; and
3)
The location and justification of all background sampling points.
b)
Except as specified in subsections (c) and (d) of this Section, an area background
concentration may be used as follows:
1)
To support a request to exclude a chemical as a contaminant of concern
from further consideration for remediation at a site due to its presence as a
result of background conditions; or
2)
As a remediation objective for a contaminant of concern at a site in lieu of
an objective developed pursuant to the other procedures of this Part.
c)
An area background concentration shall not be used IN THE EVENT THAT THE
AGENCY HAS DETERMINED IN WRITING THAT THE BACKGROUND
LEVEL FOR A REGULATED SUBSTANCE POSES AN ACUTE THREAT TO
HUMAN HEALTH OR THE ENVIRONMENT AT THE SITE WHEN
CONSIDERING THE POST-REMEDIAL ACTION LAND USE. (Section
58.5(b)(3) of the Act)
d)
IN THE EVENT THAT THE CONCENTRATION OF A REGULATED
SUBSTANCE OF CONCERN ON THE SITE EXCEEDS A REMEDIATION
OBJECTIVE ADOPTED BY THE BOARD FOR RESIDENTIAL LAND USE,
THE PROPERTY MAY NOT BE CONVERTED TO RESIDENTIAL USE
UNLESS SUCH REMEDIATION OBJECTIVE OR AN ALTERNATIVE RISK-
BASED REMEDIATION OBJECTIVE FOR THAT REGULATED
SUBSTANCE OF CONCERN IS FIRST ACHIEVED. If the land use is
restricted, there shall be an institutional control in place in accordance with
Subpart J. (Section 58.5(b)(2) of the Act)
Source: Amended at _____ Ill. Reg. ___________, effective, __________________.
SUBPART E: TIER 1 EVALUATION
Section 742.510
Tier 1 Remediation Objectives Tables
a)
Soil remediation objectives are listed in Appendix B, Tables A, B, C and D.
1)
Appendix B, Table A is based upon residential property use.
A)
The first column to the right of the chemical name lists soil
remediation objectives for the soil ingestion exposure route.
B)
The second column lists the soil remediation objectives for the
inhalation exposure route.
11
C)
The third and fourth columns list soil remediation objectives for the
soil component of the groundwater ingestion exposure route for the
respective classes of groundwater:
i)
Class I groundwater; and
ii)
Class II groundwater.
D)
The final column lists the Acceptable Detection Limit (ADL), only
where applicable.
2)
Appendix B, Table B is based upon industrial/commercial property use.
A)
The first and third columns to the right of the chemical name list the
soil remediation objectives for the soil ingestion exposure route
based on two receptor populations:
i)
Industrial/commercial; and
ii)
Construction worker.
B)
The second and fourth columns to the right of the chemical name
list the soil remediation objectives for the inhalation exposure route
based on two receptor populations:
i)
Industrial/commercial; and
ii)
Construction worker.
C)
The fifth and sixth columns to the right of the chemical name list
the soil remediation objectives for the soil component of the
groundwater ingestion exposure route for two classes of
groundwater:
i)
Class I groundwater; and
ii)
Class II groundwater.
3)
Appendix B, Tables C and D set forth pH specific soil remediation
objectives for inorganic and ionizing organic chemicals for the soil
component of the groundwater ingestion route.
A)
Table C sets forth remediation objectives based on Class I
groundwater and Table D sets forth remediation objectives based
on Class II groundwater.
12
B)
The first column in Tables C and D lists the chemical names.
C)
The second through ninth columns to the right of the chemical
names list the pH based soil remediation objectives.
4)
For the inorganic chemicals listed in Appendix B, Tables A and B, the soil
component of the groundwater ingestion exposure route shall be evaluated
using TCLP (SW-846 Method 1311) or SPLP (SW-846 Method 1312),
incorporated by reference at Section 742.210 unless a person chooses to
evaluate the soil component on the basis of the total amount of
contaminant in a soil sample result in accordance with subsection (a)(5) of
this Section.
5)
For those inorganic and ionizing organic chemicals listed in Appendix B,
Tables C and D, if a person elects to evaluate the soil component of the
groundwater ingestion exposure route based on the total amount of
contaminant in a soil sample result (rather than TCLP or SPLP analysis),
the person shall determine the soil pH at the site and then select the
appropriate soil remediation objectives based on Class I and Class II
groundwaters from Tables C and D, respectively. If the soil pH is less than
4.5 or greater than 8.0, then Tables C and D cannot be used.
6)
Unless one or more exposure routes are excluded from consideration under
Subpart C, the most stringent soil remediation objective of the exposure
routes (
i.e
., soil ingestion exposure route, inhalation exposure route, and
soil component of the groundwater ingestion exposure route) shall be
compared to the concentrations of soil contaminants of concern measured
at the site. When using Appendix B, Table B to select soil remediation
objectives for the ingestion exposure route and inhalation exposure route,
the remediation objective shall be the more stringent soil remediation
objective of the industrial/commercial populations and construction worker
populations.
7)
Confirmation sample results may be averaged or soil samples may be
composited in accordance with Section 742.225.
8)
If a soil remediation objective for a chemical is less than the ADL, the ADL
shall serve as the soil remediation objective.
b)
Groundwater remediation objectives for the groundwater component of the
groundwater ingestion exposure route are listed in Appendix B, Table E.
However, Appendix B, Table E must be corrected for the cumulative effect of
mixtures of similar-acting noncarcinogenic chemicals as set forth in Section
742.505(b)(3).
13
1)
The first column to the right of the chemical name lists groundwater
remediation objectives for Class I groundwater, and the second column
lists the groundwater remediation objectives for Class II groundwater.
2)
To use Appendix B, Table E of this Part, the 35 Ill. Adm. Code 620
classification for groundwater at the site shall be determined. The
concentrations of groundwater contaminants of concern at the site are
compared to the applicable Tier 1 groundwater remediation objectives for
the groundwater component of the groundwater ingestion exposure route
in Appendix B, Table E.
c)
For contaminants of concern not listed in Appendix B, Tables A, B and E, a person
may request site-specific remediation objectives from the Agency or propose site-
specific remediation objectives in accordance with 35 Ill. Adm. Code 620, Subpart
I of this Part, or both.
Source: Amended at _______ Ill. Reg. ______________, effective _________________.
SUBPART H: TIER 2 GROUNDWATER EVALUATION
Section 742.810
Calculations to Predict Impacts from Remaining Groundwater Contamination
a)
Equation R26 predicts the contaminant concentration along the centerline of a
plume emanating from a vertical planar source in the aquifer (dimensions S
w
wide
and S
d
deep). This model accounts for both three-dimensional dispersion (x is the
direction of groundwater flow, y is the other horizontal direction, and z is the
vertical direction) and biodegradation.
1)
The parameters in this equation are:
X =
distance from the planar source to the location of
concern, along the centerline of the plume (i.e., y=0,
z=0)
C
x
=
the concentration of the contaminant at a distance X
from the source, along the centerline of the plume
C
source
=
the greatest potential concentration of the contaminant
of concern in the groundwater at the source of the
contamination, based on the concentrations of
contaminants in groundwater due to the release and the
projected concentration of the contaminant migrating
from the soil to the groundwater. As indicated above,
the model assumes a planar source discharging
groundwater at a concentration equal to C
source
α
x
=
dispersivity in the x direction (i.e., Equation R16)
14
α
y
=
dispersivity in the y direction (i.e., Equation R17)
α
z
=
dispersivity in the z direction (i.e., Equation R18)
U =
specific discharge (i.e., actual groundwater flow velocity
through a porous medium; takes into account the fact
that the groundwater actually flows only through the
pores of the subsurface materials) where the aquifer
hydraulic conductivity (K), the hydraulic gradient (I)
and the total soil porosity (
θ
T
) must be known (i.e.,
Equation R19)
λ
=
first order degradation constant obtained from Appendix
C, Table E or from measured groundwater data
S
w
=
width of planar source in the y direction
S
d
=
depth of planar source in the z direction
2)
The following
parameters are determined through field measurements: U,
K, I,
θ
T
, S
w
, S
d
.
A)
The determination of values for U, K, I and
θ
T
can be obtained
through the appropriate laboratory and field techniques;
B)
From the immediate down-gradient edge of the source of the
groundwater contamination values for S
w
and S
d
shall be
determined. S
w
is defined as the width of groundwater at the
source which exceeds the Tier 1 groundwater remediation
objective. S
d
is defined as the depth of groundwater at the source
which exceeds the Tier 1 groundwater remediation objective; and
C)
Total soil porosity can also be calculated using Equation R23.
b)
Once values are obtained for all the input parameters identified in subsection (a) of
this Section, the contaminant concentration along the centerline of the plume at a
distance X from the source shall be calculated such that that distance from the
down-gradient edge of the source of the contamination at the site to the point
where the contaminant concentration is equal to the Tier 1 groundwater
remediation objective or Health Advisory concentration.
15
1)
If there are any potable water supply wells located within the calculated
distance X, then the Tier 1 groundwater remediation objective or Health
Advisory concentration shall be met at the edge of the minimum or
designated maximum setback zone of the nearest potable water supply well
down-gradient of the source. If no potable water supply wells exist within
the calculated distance X, then it can be determined that no existing potable
water supply wells are adversely impacted.
2)
To demonstrate that no surface water is adversely impacted, X shall be the
distance from the down-gradient edge of the source of the contamination at
the site to the nearest surface water body. This calculation must show that
the contaminant in the groundwater at this location (C
x
) does not exceed
the applicable water quality standard.
Source: Amended at ________ Ill. Reg. ____________ effective _________________.
SUBPART I: TIER 3 EVALUATION
Section 742.900
Tier 3 Evaluation Overview
a)
Tier 3 sets forth a flexible framework to develop remediation objectives outside of
the requirements of Tiers 1 and 2. Although Tier 1 and Tier 2 evaluations are not
prerequisites to conduct Tier 3 evaluations, data from Tier 1 and Tier 2 can assist
in developing remediation objectives under a Tier 3 evaluation.
b)
The level of detail required to adequately characterize a site depends on the
particular use of Tier 3. Tier 3 can require additional investigative efforts beyond
those described in Tier 2 to characterize the physical setting of the site. However,
in situations where remedial efforts have simply reached a physical obstruction
additional investigation may not be necessary for a Tier 3 submittal.
c)
Situations that can be considered for a Tier 3 evaluation include, but are not
limited to:
1)
Modification of parameters not allowed under Tier 2;
2)
Use of models different from those used in Tier 2;
3)
Use of additional site data to improve or confirm predictions of exposed
receptors to contaminants of concern;
4)
Analysis of site-specific risks using formal risk assessment, probabilistic
data analysis, and sophisticated fate and transport models (e.g., requesting
a target hazard quotient greater than 1 or a target cancer risk greater than 1
in 1,000,000);
16
5)
Requests for site-specific remediation objectives because an assessment
indicates further remediation is not practical;
6)
Incomplete human exposure pathway(s) not excluded under Subpart C;
7)
Use of toxicological-specific information not available from the sources
listed in Tier 2;
8)
Land uses which are substantially different from the assumed residential or
industrial/commercial property uses of a site (e.g., as site will be used for
recreation in the future and cannot be evaluated in Tiers 1 or 2); and
9)
Requests for site-specific remediation objectives which exceed Tier 1
groundwater remediation objectives so long as the following is
demonstrated:
A) TO THE EXTENT PRACTICAL, THE EXCEEDANCE OF THE
GROUNDWATER QUALITY STANDARD HAS BEEN
MINIMIZED AND BENEFICIAL USE APPROPRIATE TO THE
GROUNDWATER THAT WAS IMPACTED HAS BEEN
RETURNED; AND
B) ANY THREAT TO HUMAN HEALTH OR THE ENVIRONMENT
HAS BEEN MINIMIZED. (Section 58.5(D)(4)(A) of the Act)
d)
For requests of a target cancer risk ranging between 1 in 1,000,000 and 1 in
10,000 at the point of human exposure or a target hazard quotient greater than 1 at
the point of human exposure, the requirements of Section 742.915 shall be
followed. Requests for a target cancer risk exceeding 1 in 10,000 at the point of
human exposure are not allowed.
e)
Requests for approval of a Tier 3 evaluation must be submitted to the Agency for
review under the specific program under which remediation is performed. When
reviewing a submittal under Tier 3, the Agency shall consider WHETHER THE
INTERPRETATIONS AND CONCLUSIONS REACHED ARE SUPPORTED
BY THE INFORMATION GATHERED. (Section 58.7(e)(1) of the Act). The
Agency shall approve a Tier 3 evaluation if the person submits the information
required under this Part and establishes through such information that public health
is protected and that specified risks to human health and the environment have
been minimized.
Source: Amended at _______ Ill. Reg. ____________, effective _________________.
17
SUBPART J: INSTITUTIONAL CONTROLS
Section 742.1015
Ordinances
a)
An ordinance adopted by a unit of local government that effectively prohibits the
installation of potable water supply wells (and the use of such wells) may be used
as an institutional control to meet the requirements of Section 742.320(d) or
742.805(a)(3) if the requirements of this Section are met. Ordinances prohibiting
the installation of potable water supply wells (and the use of such wells) that do
not expressly prohibit the installation of potable water supply wells (and the use of
such wells) by units of local government may be acceptable as institutional controls
if the requirements of this Section are met and a Memorandum of Understanding
(MOU) is entered into under subsection (i) of this Section.
b)
A request for approval of a local ordinance as an institutional control shall provide
the following:
1)
A copy of the ordinance restricting groundwater use certified by an official
of the unit of local government in which the site is located that it is the
latest, most current copy of the ordinance, unless the Agency and the unit
of local government have entered an agreement under subsection (i) of this
Section, in which case the request may alternatively reference the MOU.
The ordinance must demonstrate that potable use of groundwater from
potable water supply wells is prohibited;
2)
A scaled map(s) delineating the areal extent of groundwater contamination
(measured or modeled) above the applicable remediation objectives;
3)
Information showing the concentration of contaminants of concern in
which the applicable remediation objectives are exceeded;
4)
A scaled map delineating the boundaries of all properties under which
groundwater is located which exceeds the applicable groundwater
remediation objectives;
5)
Information identifying the current owner(s) of each property identified in
subsection (b)(4) of this Section; and
6)
A copy of the proposed submission of the information to the current
owners identified in subsection (b)(5) of this Section of the information
required in subsections (b)(1) through (b)(5) of this Section and proof that
the notification required in subsection (c) of this Section has been
submitted.
c)
Each of the property owners identified in subsection (b)(5) of this Section and the
unit of local government must receive written notification from the party desiring
to use the institutional control that groundwater remediation objectives have been
18
approved by the Agency. Written proof of this notification shall be submitted to
the Agency within 45 days from the date of the instrument memorializing the
Agency’s no further remediation determination. The notification shall include:
1)
The name and address of the unit of local government;
2)
The citation to the ordinance;
3)
A description of the property being sent notice by adequate legal
description or by reference to a plat showing the boundaries;
4)
A statement that the ordinance restricting groundwater use has been used
by the Agency in reviewing a request for a groundwater remediation
objective;
5)
A statement as to the nature of the release and response action with the site
name, address, and Agency site number or Illinois inventory identification
number; and
6)
A statement as to where more information may be obtained regarding the
ordinance.
d)
Unless the Agency and the unit of local government have entered into a MOU
under subsection (i) of this Section, the current owner or successors in interest of a
site who have received approval of use of an ordinance as an institutional control
under this Section shall:
1)
Monitor activities of the unit of local government relative to variance
requests or changes in the ordinance relative to the use of potable
groundwater at properties identified in subsection (b)(4) of this Section;
and
2)
Notify the Agency of any approved variance requests or ordinance changes
within 30 days after the date such action has been approved.
e)
The information required in subsections (b)(1) through (b)(6) of this Section and
the Agency letter approving the groundwater remediation objective shall be
submitted to the unit of local government. Proof that the information has been
filed with the unit of local government shall be provided to the Agency.
f)
Any ordinance or MOU used as an institutional control pursuant to this Section
shall be recorded in the Office of the Recorder or Registrar of Titles of the county
in which the site is located together with the instrument memorializing the
Agency’s no further remediation determination pursuant to the specific program
within 45 days after receipt of the Agency’s no further remediation.
19
g)
An institutional control approved under this Section shall not become effective
until officially recorded in accordance with subsection (f) of this Section. The
person receiving the approval shall obtain and submit to the Agency within 30 days
after recording a copy of the institutional control demonstrating that it has been
recorded.
h)
The following shall be grounds for voidance of the ordinance as an institutional
control and the instrument memorializing the Agency's no further remediation
determination:
1)
Modification of the ordinance by the unit of local government to allow
potable use of groundwater;
2)
Approval of a site-specific request, such as a variance, to allow potable use
of groundwater at a site identified in subsection (b)(4) of this Section; or
3)
Violation of the terms of an institutional control recorded under Section
742.1005 or Section 742.1010.
i)
The Agency and a unit of local government may enter into a MOU under this
Section if the unit of local government has adopted an ordinance satisfying
subsection (a) of this Section and if the requirements of this subsection are met.
The MOU shall include the following:
1)
Identification of the authority of the unit of local government to enter the
MOU;
2)
Identification of the legal boundaries, or equivalent, under which the
ordinance is applicable;
3)
A certified copy of the ordinance;
4)
A commitment by the unit of local government to notify the Agency of any
variance requests or proposed ordinance changes at least 30 days prior to
the date the local government is scheduled to take action on the request or
proposed change;
5)
A commitment by the unit of local government to maintain a registry of all
sites within the unit of local government that have received no further
remediation determinations pursuant to specific programs and
6)
If the ordinance does not expressly prohibit the installation of potable water
supply wells (and the use of such wells) by units of local government, a
commitment by the unit of local government:
20
A)
To review the registry of sites established under subsection (i)(5) of
this Section prior to siting potable water supply wells within the
area covered by the ordinance;
B)
To determine whether the potential source of potable water may be
or has been affected by contamination left in place at those sites;
and
C)
To take whatever steps are necessary to ensure that the potential
source of potable water is protected from the contamination or
treated before it is used as a potable water supply.
Source: Amended at ________ Ill. Reg. ____________, effective ________________.
21
Section 742.APPENDIX A: General
Section 742.TABLE H:
Chemicals Whose Tier 1 Class I Groundwater Remediation
Objective Exceeds the 1 in 1,000,000 Cancer Risk
Concentration.
Class I Groundwater
1 in 1,000,000 Cancer
Remediation Objective
Risk Concentration
ADL
Chemical
(mg/l)
(mg/l)
(mg/l)
Aldrin
0.00004
0.0000025
0.00004
Benzo(a)pyrene
0.0002
0.00000512
0.00023
Bis(2-chloroethyl)ether
0.01
0.0000377
0.01
Bis(2-ethylhexyl)phthalate
0.006
0.00361
0.0027
Carbon Tetrachloride
0.005
0.000366
0.00003
Chlordane
0.002
0.0000366
0.00014
Dibenzo(a,h)anthracene
0.0003
0.00000512
0.0003
1,2-Dibromo-3-chloropropane
0.0002
0.0000361
0.0002
1,2-Dibromoethane
0.00005
0.000000410
0.00005
3,3'-Dichlorobenzidine
0.02
0.0000819
0.02
1,2-Dichloroethane
0.005
0.000494
0.00003
Dieldrin
0.00002
0.00000253
0.00002
Heptachlor
0.0004
0.00000819
0.00003
Heptachlor epoxide
0.0002
0.00000494
0.00032
Hexachlorobenzene
0.00006
0.0000253
0.00006
alpha-HCH
0.00003
0.00000614
0.00003
Tetrachloroethylene
0.005
0.000716
0.00001
Toxaphene
0.003
0.0000377
0.00086
Vinyl chloride
0.002
0.00001545
0.00006
Ionizable Organics
N-Nitrosodiphenylamine
0.01
0.00717
0.01
N
-
Nitrosodi-n-propylamine
0.01
0.00000512
0.01
Pentachlorophenol
0.001
0.000371
0.001
2,4,6-Trichlorophenol
0.0064
0.00377
0.0064
Inorganics
Arsenic
0.05
0.0000257
0.001
Beryllium
0.004
0.00000832
0.004
Source: Added at 21 Ill. Reg. ______________ , effective __________________; amended at
_____ Ill. Reg. ____________, effective _______________________.
Section 742.APPENDIX B:
Tier 1 Tables and Illustrations
Section 742.Table C:
pH Specific Soil Remediation Objectives for Inorganics and Ionizing Organics for the Soil Component of
the Groundwater Ingestion Route (Class I Groundwater)
Chemical (totals)
(mg/kg)
pH 4.5 to
4.74
pH 4.75
to 5.24
pH 5.25
to 5.74
pH 5.75
to 6.24
pH 6.25
to 6.64
pH 6.65
to 6.89
pH 6.9
to 7.24
pH 7.25
to 7.74
pH 7.75
to 8.0
Inorganics
Antimony
5
5
5
5
5
5
5
5
5
Arsenic
25
26
27
28
29
29
29
30
31
Barium
260
490
850
1,200
1,500
1,600
1,700
1,800
2,100
Beryllium
1.1
2.1
3.4
6.6
22
63
140
1,000
8,000
Cadmium
1.0
1.7
2.7
3.7
5.2
7.5
11
59
430
Chromium (+6)
70
62
54
46
40
38
36
32
28
Copper
330
580
2,100
11,000
59,000
130,000
200,000
330,000
330,000
Cyanide
40
40
40
40
40
40
40
40
40
Mercury
0.01
0.01`
0.03
0.15
0.89
2.1
3.3
6.4
8.0
Nickel
20
36
56
76
100
130
180
700
3,800
Selenium
24
17
12
8.8
6.3
5.2
4.5
3.3
2.4
Silver
0.24
0.33
0.62
1.5
4.4
8.5
13
39
110
Chemical (totals)
(mg/kg)
pH 4.5 to
4.74
pH 4.75
to 5.24
pH 5.25
to 5.74
pH 5.75
to 6.24
pH 6.25
to 6.64
pH 6.65
to 6.89
pH 6.9
to 7.24
pH 7.25
to 7.74
pH 7.75
to 8.0
Thallium
1.6
1.8
2.0
2.4
2.6
2.8
3.0
3.4
3.8
Vanadium
980
980
980
980
980
980
980
980
980
Zinc
1,000
1,800
2,600
3,600
5,100
6,200
7,500
16,000
53,000
Organics
Benzoic Acid
440
420
410
400
400
400
400
400
400
2-Chlorophenol
4.0
4.0
4.0
4.0
3.9
3.9
3.9
3.6
3.1
2,4-
Dichlorophenol
1.0
1.0
1.0
1.0
1.0
1.0
1.0
0.86
0.69
Dinoseb
8.4
4.5
1.9
0.82
0.43
0.34
0.31
0.27
0.25
Pentachlorophenol
0.54
0.32
0.15
0.07
0.04
0.03
0.02
0.02
0.02
2,4,5-TP (Silvex)
26
16
12
11
11
11
11
11
11
2,4,5-
Trichlorophenol
400
390
390
370
320
270
230
130
64
2,4,6-
Trichlorophenol
0.37
0.36
0.34
0.269
0.20
0.15
0.13
0.09
0.07
Source: Amended at _______ Ill. Reg. ____________, effective _____________________.
Section 742.APPENDIX B
Section 742.Table D:
pH Specific Soil Remediation Objectives for Inorganics and Ionizing Organics for the Soil Component of
the Groundwater Ingestion Route (Class II Groundwater)
Chemical (totals)
(mg/kg)
pH 4.5 to
4.74
pH 4.75
to 5.24
pH 5.25
to 5.74
pH 5.75
to 6.24
pH 6.25
to 6.64
pH 6.65
to 6.89
pH 6.9
to 7.24
pH 7.25
to 7.74
pH 7.75
to 8.0
Inorganics
Antimony
20
20
20
20
20
20
20
20
20
Arsenic
100
100
100
110
110
120
120
120
120
Barium
260
490
850
1,200
1,500
1,600
1,700
1,800
2,100
Beryllium
140
260
420
820
2,800
7,900
17,000
130,000
1,000,000
Cadmium
10
17
27
37
52
75
110
590
4,300
Chromium (+6)
No Data
No Data
No Data
No Data
No Data
No Data
No Data
No Data
No Data
Copper
330
580
2,100
11,000
59,000
130,000
200,000
330,000
330,000
Cyanide
120
120
120
120
120
120
120
120
120
Mercury
0.05
0.06
0.14
0.75
4.4
10
16
32
40
Nickel
400
730
1,100
1,500
2,000
2,600
3,500
14,000
76,000
Selenium
24
17
12
8.8
6.3
5.2
4.5
3.3
2.4
Thallium
16
18
20
24
26
28
30
34
38
Zinc
2,000
3,600
5,200
7,200
10,000
12,000
15,000
32,000
110,000
Chemical (totals)
(mg/kg)
pH 4.5 to
4.74
pH 4.75
to 5.24
pH 5.25
to 5.74
pH 5.75
to 6.24
pH 6.25
to 6.64
pH 6.65
to 6.89
pH 6.9
to 7.24
pH 7.25
to 7.74
pH 7.75
to 8.0
Organics
Benzoic Acid
440
420
410
400
400
400
400
400
400
2-Chlorophenol
20
20
20
20
20
20
19
3.6
3.1
2,4-
Dichlorophenol
1.0
1.0
1.0
1.0
1.0
1.0
1.0
0.86
0.69
Dinoseb
84
45
19
8.2
4.3
3.4
3.1
2.7
2.5
Pentachlorophenol
2.7
1.6
0.75
0.33
0.18
0.15
0.12
0.11
0.10
2,4,5-TP (Silvex)
130
79
62
57
55
55
55
55
55
2,4,5-
Trichlorophenol
2,000
2,000
1,900
1,800
1,600
1,400
1,200
640
64
2,4,6-
Trichlorophenol
0.37
1.9
0.36
1.8
0.34
1.7
0.26
1.4
0.20
1.0
0.15
0.77
0.13
0.09
0.07
Source: Amended at _______ Ill. Reg. ___________, effective, _______________________.
26
Section 742.APPENDIX B:
Tier 1 Tables and Illustrations
Section 742.TABLE F:
Values Used to Calculate the Tier 1 Soil Remediation Objectives
for the Soil Component of the Groundwater Ingestion Route
GW
obj
Concentration used to Calculate
Tier 1 Soil Rememdiation Objectives
a
CAS No.
Chemical Name
Class I
(mg/L)
Class II
(mg/L)
83-32-9
Acenaphthene
2.0
b
10
67-64-1
Acetone
4.0
b
4.0
15972-60-8
Alachlor
0.002
c
0.01
c
116-06-3
Aldicarb
0.003
c
0.015
c
309-00-2
Aldrin
5.0E-6
b
2.5E-5
120-12-7
Anthracene
10
b
50
1912-24-9
Atrazine
0.003
c
0.015
c
71-43-2
Benzene
0.005
c
0.025
c
56-55-3
Benzo(
a
)anthracene
0.0001
b
0.0005
205-99-2
Benzo(
b
)fluoranthene
0.0001
b
0.0005
207-08-9
Benzo(
k
)fluroanthene
0.001
b
0.005
50-32-8
Benzo(
a
)pyrene
0.0002
a,c
0.002
c
111-44-4
Bis(2-chloroethyl)ether
8.0E-5
b
8.0E-5
117-81-7
Bis(2-ethylhexyl)phthalate
0.006
a,c
0.06
c
75-27-4
Bromodichloromethane
(Dichlorobromomethane)
0.1
b
0.1
75-25-2
Bromoform
0.1
b
0.01
71-36-3
Butanol
4.0
b
4.0
85-68-7
Butyl benzyl phthalate
7.0
b
35
86-74-8
Carbazole
0.004
b
0.02
1563-66-2
Carbofuran
0.04
c
0.2
c
75-15-0
Carbon disulfide
4.0
b
20
56-23-5
Carbon tetrachloride
0.005
c
0.025
c
57-74-9
Chlordane
0.002
c
0.01
c
27
GW
obj
Concentration used to Calculate
Tier 1 Soil Rememdiation Objectives
a
CAS No.
Chemical Name
Class I
(mg/L)
Class II
(mg/L)
108-90-7
Chlorobenzene
(Monochlorobenzene)
0.1
c
0.5
c
124-48-1
Chlorodibromomethane
(Dibromochloromethane)
0.06
b
0.06
67-66-3
Chloroform
0.1
b
0.5
218-01-9
Chrysene
0.1
b
0.05
94-75-7
2,4-D
0.07
c
0.35
c
75-99-0
Dalapon
0.2
c
2.0
c
72-54-8
DDD
0.0004
b
0.002
72-55-9
DDE
0.0003
b
0.0015
50-29-3
DDT
0.0003
b
0.0015
53-70-3
Dibenzo(
a,h
)anthracene
1.0E-5
b
5.0E-5
96-12-8
1,2-Dibromo-3-chloropropane
0.0002
c
0.0002
c
106-93-4
1,2-Dibromoethane
(Ethylene dibromide)
0.00005
a,c
0.0005
c
84-74-2
Di-
n
-butyl phthalate
4.0
b
20
95-50-1
1,2-Dichlorobenzene
(
o
- Dichlorobenzene)
0.6
c
1.5
c
106-46-7
1,4-Dichlorobenzene
(
p
- Dichlorobenzene)
0.075
c
0.375
c
91-94-1
3,3'-Dichlorobenzidine
0.0002
b
0.001
75-34-3
1,1-Dichloroethane
4.0
b
20
107-06-2
1,2-Dichloroethane
(Ethylene dichloride)
0.005
c
0.025
c
75-35-4
1,1-Dichloroethylene
0.007
c
0.035
c
156-59-2
cis
-1,2-Dichloroethylene
0.07
c
0.2
c
156-60-5
trans
-1,2-Dichloroethylene
0.1
c
0.5
c
78-97-5
1,2-Dichloropropane
0.005
c
0.025
c
542-75-6
1,3-Dichloropropene
(1,3-Dichloropropylene,
cis
+
trans
)
0.0005
b
0.0025
28
GW
obj
Concentration used to Calculate
Tier 1 Soil Rememdiation Objectives
a
CAS No.
Chemical Name
Class I
(mg/L)
Class II
(mg/L)
60-57-1
Dieldrin
5.0E-6
b
2.5E-5
84-66-2
Diethyl phthalate
30
b
30
121-14-2
2,4-Dinitrotoluene
0.0001
b
0.0001
606-20-2
2,6-Dinitrotoluene
0.0001
0.0001
88-85-7
Dinoseb
0.007
c
0.07
c
117-84-0
Di-
n
-octyl phthalate
0.7
b
3.5
115-29-7
Endosulfan
0.2
b
1.0
145-73-3
Endothall
0.1
c
0.1
c
72-20-8
Endrin
0.002
c
0.01
c
100-41-4
Ethylbenzene
0.7
c
1.0
c
206-44-0
Fluoranthene
1.0
b
5.0
86-73-7
Fluorene
1.0
b
5.0
76-44-8
Heptachlor
0.0004
c
0.002
c
1024-57-3
Heptachlor epoxide
0.0002
c
0.001
c
118-74-1
Hexachlorobenzene
0.001
b
0.005
319-84-6
alpha
-HCH (
alpha
-BHC)
1.0E-5
b
5.0E-5
58-89-9
gamma
-HCH (Lindane)
0.0002
c
0.001
c
77-47-4
Hexachlorocyclopentadiene
0.05
c
0.5
c
67-72-1
Hexachloroethane
0.007
0.035
193-39-5
Indeno(1,2,3-
c,d
)pyrene
0.0001
b
0.0005
78-59-1
Isophorone
1.4
1.4
72-43-5
Methoxychlor
0.04
c
0.2
c
74-83-9
Methyl bromide
(Bromomethane)
0.05
b
0.25
75-09-2
Methylene chloride
(Dichloromethane)
0.005
c
0.05
c
91-20-3
Naphthalene
1.0
b
5.0
98-95-3
Nitrobenzene
0.02
b
0.02
29
GW
obj
Concentration used to Calculate
Tier 1 Soil Rememdiation Objectives
a
CAS No.
Chemical Name
Class I
(mg/L)
Class II
(mg/L)
1918-02-1
Picloram
0.5
c
5.0
c
1336-36-3
Polychlorinated biphenyls (PCBs)
---
---
129-00-0
Pyrene
1.0
b
5.0
122-34-9
Simazine
0.004
c
0.04
c
100-42-5
Styrene
0.1
c
0.5
c
93-72-1
2,4,5-TP
(Silvex)
0.05
c
0.25
c
127-18-4
Tetrachloroethylene
(Perchloroethylene)
0.005
c
0.025
c
108-88-3
Toluene
1.0
c
2.5
c
8001-35-2
Toxaphene
0.003
c
0.015
c
120-82-1
1,2,4-Trichlorobenzene
0.07
c
0.7
c
71-55-6
1,1,1-Trichloroethane
2
0.2
c
1.0
c
79-00-5
1,1,2-Trichloroethane
0.005
c
0.05
c
79-01-6
Trichloroethylene
0.005
c
0.025
c
108-05-4
Vinyl acetate
40
b
40
75-01-4
Vinyl chloride
0.002
c
0.01
c
1330-20-7
Xylenes (total)
10.0
c
10.0
c
Ionizable Organics
65-85-0
Benzoic Acid
100
b
100
106-47-8
4-Chloroaniline
(p
-Chloroaniline)
0.1
b
0.1
95-57-8
2-Chlorophenol
0.2
b
1.0
120-83-2
2,4-Dichlorophenol
0.1
b
0.1
105-67-9
2,4-Dimethylphenol
0.7
b
0.7
51-28-5
2,4-Dinitrophenol
0.04
b
0.04
95-48-7
2-Methylphenol
(
o
- Cresol)
2.0
b
2.0
86-30-6
N
-Nitrosodiphenylamine
0.02
b
0.1
30
GW
obj
Concentration used to Calculate
Tier 1 Soil Rememdiation Objectives
a
CAS No.
Chemical Name
Class I
(mg/L)
Class II
(mg/L)
621-64-7
N
-Nitrosodi-
n
-propylamine
1.0E-5
b
1.0E-5
87-86-5
Pentachlorophenol
0.001
a,c
0.005
c
108-95-2
Phenol
0.1
c
0.1
c
95-95-4
2,4,5-Trichlorophenol
4.0
b
20
88-06-2
2,4,6-Trichlorophenol
0.008
b
0.04
Inorganics
7440-36-0
Antimony
0.006
c
0.024
c
7440-38-2
Arsenic
0.05
c
0.2
c
7440-39-3
Barium
2.0
c
2.0
c
7440-41-7
Beryllium
0.004
c
0.5
c
7440-42-8
Boron
2.0
c
2.0
c
7440-43-9
Cadmium
0.005
c
0.05
c
16887-00-6
Chloride
200
c
200
c
7440-47-3
Chromium, total
0.1
c
1.0
c
18540-29-9
Chromium, ion, hexavalent
---
---
7440-48-4
Cobalt
1.0
c
1.0
c
7440-50-8
Copper
0.65
c
0.65
c
57-12-5
Cyanide
0.2
c
0.6
c
7782-41-4
Fluoride
4.0
c
4.0
c
15438-31-0
Iron
5.0
c
5.0
c
7439-92-1
Lead
0.0075
c
0.1
c
7439-96-5
Manganese
0.15
c
10.0
c
7439-97-6
Mercury
0.002
c
0.01
c
7440-02-0
Nickel
0.1
c
2.0
c
14797-55-8
Nitrate as N
10.0
c
100
c
7782-49-2
Selenium
0.05
c
0.05
c
7440-22-4
Silver
0.05
c
---
14808-79-8
Sulfate
400
c
400
c
31
GW
obj
Concentration used to Calculate
Tier 1 Soil Rememdiation Objectives
a
CAS No.
Chemical Name
Class I
(mg/L)
Class II
(mg/L)
7440-28-0
Thallium
0.002
c
0.02
c
7440-62-2
Vanadium
0.049
---
7440-66-6
Zinc
5.0
c
10
c
Chemical Name and Groundwater Remediation Objective Notations
a
The Equation S17 is used to calculate the Soil Remediation Objective for the Soil
Component of the Groundwater Ingestion Route; this equation requires calculation of the
Target Soil Leachate Concentration (C
w
) from Equation S18: C
w
= DF x GW
obj
.
b
Value listed is the Water Health Based Limit (HBL) for this chemical from Soil Screening
Guidance: User’s Guide, incorporated by reference at Section 742.210; for carcinogens, the
HBL is equal to a cancer risk of 1.0E-6, and for noncarcinogens is equal to a Hazard
Quotient of 1.0. NOTE: These GW
obj
concentrations are not equal to the Tier 1
Groundwater Remediation Objectives for the Direct Ingestion of Groundwater Component
of the Groundwater Ingestion Route, listed in Section 742.Appendix B, Table E.
c
Value listed is also the Groundwater Quality Standard for this chemical pursuant to 35 Ill.
Adm. Code 620.410 for Class I Groundwater or 35 Ill. Adm. Code 620.420 for Class II
Groundwater.
Source: Amended at _____ Ill. Reg. __________, effective ______________________.
Section 742.APPENDIX C:
Tier 2 Tables and Illustrations
Section 742.TABLE I:
K
oc
Values for Ionizing Organics as a Function of pH (cm
3
/g or L/kg)
pH
Benzoic Acid
2-Chloro-
phenol
2,4-
Dichloro-
phenol
Pentachloro-
phenol
2,4,5-
Trichloro-
phenol
2,4,6-
Trichloro-
phenol
Dinoseb
2,3,5-TP
(Silvex)
4.5
1.07E+01
3.98E+02
1.59E+02
1.34E+04
2.37E+03
1.06E+03
3.00E+034
1.28E+04
4.6
9.16E+00
3.98E+02
1.59E+02
1.24E+04
2.37E+03
1.05E+03
2.71E+034
1.13E+04
4.7
7.79E+00
3.98E+02
1.59E+02
1.13E+04
2.37E+03
1.05E+03
2.41E+034
1.01E+04
4.8
6.58E+00
3.98E+02
1.59E+02
1.02E+04
2.37E+03
1.05E+03
2.12E+034
9.16E+03
4.9
5.54E+00
3.98E+02
1.59E+02
9.05E+03
2.37E+03
1.04E+03
1.85E+04
8.40E+03
5.0
4.64E+00
3.98E+02
1.59E+02
7.96E+03
2.36E+03
1.03E+03
1.59E+04
7.76E+03
5.1
3.88E+00
3.98E+02
1.59E+02
6.93E+03
2.36E+03
1.02E+03
1.36E+04
7.30E+03
5.2
3.25E+00
3.98E+02
1.59E+02
5.97E+03
2.35E+03
1.01E+03
1.15E+04
6.91E+03
5.3
2.72E+00
3.98E+02
1.59E+02
5.10E+03
2.34E+03
9.99E+02
9.66E+03
6.60E+03
5.4
2.29E+00
3.98E+02
1.58E+02
4.32E+03
2.33E+03
9.82E+02
8.10E+03
6.36E+03
5.5
1.94E+00
3.97E+02
1.58E+02
3.65E+03
2.32E+03
9.62E+02
6.77E+03
6.16E+03
5.6
1.65E+00
3.97E+02
1.58E+02
3.07E+03
2.31E+03
9.38E+02
5.65E+03
6.00E+03
5.7
1.42E+00
3.97E+02
1.58E+02
2.58E+03
2.29E+03
9.10E+02
4.73E+03
5.88E+03
5.8
1.24E+00
3.97E+02
1.58E+02
2.18E+03
2.27E+03
8.77E+02
3.97E+03
5.78E+03
5.9
1.09E+00
3.97E+02
1.57E+02
1.84E+03
2.24E+03
8.39E+02
3.35E+03
5.70E+03
pH
Benzoic Acid
2-Chloro-
phenol
2,4-
Dichloro-
phenol
Pentachloro-
phenol
2,4,5-
Trichloro-
phenol
2,4,6-
Trichloro-
phenol
Dinoseb
2,3,5-TP
(Silvex)
6.0
9.69E-01
3.96E+02
1.57E+02
1.56E+03
2.21E+03
7.96E+02
2.84E+03
5.64E+03
6.1
8.75E-01
3.96E+02
1.57E+02
1.33E+03
2.17E+03
7.48E+02
2.43E+03
5.59E+03
6.2
7.99E-01
3.96E+02
1.56E+02
1.15E+03
2.12E+03
6.97E+02
2.10E+03
5.55E+03
6.3
7.36E-01
3.95E+02
1.55E+02
9.98E+02
2.06E+03
6.44E+02
1.83E+03
5.52E+03
6.4
6.89E-01
3.94E+02
1.54E+02
8.77E+02
1.99E+03
5.89E+02
1.62E+03
5.50E+03
6.5
6.51E-01
3.93E+02
1.53E+02
7.81E+02
1.91E+03
5.33E+02
1.45E+03
5.48E+03
6.6
6.20E-01
3.92E+02
1.52E+02
7.03E+02
1.82E+03
4.80E+02
1.32E+03
5.46E+03
6.7
5.95E-01
3.90E+02
1.50E+02
6.40E+02
1.71E+03
4.29E+02
1.21E+03
5.45E+03
6.8
5.76E-01
3.88E+02
1.47E+02
5.92E+02
1.60E+03
3.81E+02
1.12E+03
5.44E+03
6.9
5.60E-01
3.86E+02
1.45E+02
5.52E+02
1.47E+03
3.38E+02
1.05E+03
5.43E+03
7.0
5.47E-01
3.83E+02
1.41E+02
5.21E+02
1.34E+03
3.00E+02
9.96E+02
5.43E+03
7.1
5.38E-01
3.79E+02
1.38E+02
4.96E+02
1.21E+03
2.67E+02
9.52E+02
5.42E+03
7.2
5.32E-01
3.75E+02
1.33E+02
4.76E+02
1.07E+03
2.39E+02
9.18E+02
5.42E+03
7.3
5.25E-01
3.69E+02
1.28E+02
4.61E+02
9.43E+02
2.15E+02
8.90E+02
5.42E+03
7.4
5.19E-01
3.62E+02
1.21E+02
4.47E+02
8.19E+02
1.95E+02
8.68E+02
5.41E+03
7.5
5.16E-01
3.54E+02
1.14E+02
4.37E+02
7.03E+02
1.78E+02
8.50E+02
5.41E+03
7.6
5.13E-01
3.44E+02
1.07E+02
4.29E+02
5.99E+02
1.64E+02
8.36E+02
5.41E+03
pH
Benzoic Acid
2-Chloro-
phenol
2,4-
Dichloro-
phenol
Pentachloro-
phenol
2,4,5-
Trichloro-
phenol
2,4,6-
Trichloro-
phenol
Dinoseb
2,3,5-TP
(Silvex)
7.7
5.09E-01
3.33E+02
9.84E+01
4.23E+02
5.07E+02
1.53E+02
8.25E+02
5.41E+03
7.8
5.06E-01
3.19E+02
8.97E+01
4.18E+02
4.26E+02
1.44E+02
8.17E+02
5.41E+03
7.9
5.06E-01
3.04E+02
8.07E+01
4.14E+02
3.57E+02
1.37E+02
8.10E+02
5.41E+03
8.0
5.06E-01
2.86E+02
7.17E+01
4.10E+02
2.98E+02
1.31E+02
8.04E+02
5.41E+03
Source: Amended at _____. Ill. Reg. ___________, effective ___________________________.
35
IT IS SO ORDERED.
I, Dorothy M. Gunn, Clerk of the Illinois Pollution Control Board, hereby certify that
the above opinion and order was adopted on the 4th day of December 1997, by a vote of 6-0.
Dorothy M. Gunn, Clerk
Illinois Pollution Control Board
