APPENDIX C Tier 2 Illustrations and Tables

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 or

cm

3

water

/g

soil

)

TABLE J

Values to be Substituted for k

d

or k

s

when Evaluating Inorganics as a Function

of pH (cm

3

/g or L/kg or cm

3

water

/g

soil

)

TABLE K Parameter Estimates for Calculating Water-Filled Soil Porosity (θ

w

)

APPENDIX D Highway Authority Agreement

APPENDIX E Highway Authority Agreement Memorandum of Agreement

APPENDIX F Environmental Land Use Control

APPENDIX G Model Ordinance

APPENDIX H Memorandum of Understanding

AUTHORITY: Implementing Sections 22.4, 22.12, Title XVI, and Title XVII and authorized by

Sections 27 and 58.5 of the Environmental Protection Act [415 ILCS 5/22.4, 22.12, 27, and 58.5

and Title XVI and Title XVII].

SOURCE: Adopted in R97-12(A) at 21 Ill. Reg. 7942, effective July 1, 1997; amended in R97-

12(B) at 21 Ill. Reg. 16391, effective December 8, 1997; amended in R97-12(C) at 22 Ill. Reg.

10847, effective June 8, 1998; amended in R00-19(A) at 25 Ill. Reg. 651, effective January 6,

2001; amended in R00-19(B) at 25 Ill. Reg. 10374, effective August 15, 2001; amended in R00-

19(C) at 26 Ill. Reg. 2683, effective February 5, 2002; amended in R06-10 at 31 Ill. Reg. 4063,

effective February 23, 2007.

NOTE: Italics indicates statutory language.

SUBPART A: INTRODUCTION

Section 742.100

Intent and Purpose

---

a)

This Part sets forth procedures for evaluating the risk to human health posed by

environmental conditions and developing remediation objectives that achieve

acceptable risk levels.

b)

The purpose of these procedures is to provide for the adequate protection of

human health and the environment based on the risks to human health posed by

environmental conditions while incorporating site related information.

Section 742.105

Applicability

a)

Any person, including a person required to perform an investigation pursuant to

the Illinois Environmental Protection Act [415 ILCS 5] (Act), may elect to

proceed under this Part to the extent allowed by State or federal law and

regulations and the provisions of this Part and subject to the exceptions listed in

subsection (h) below. A person proceeding under this Part may do so to the

extent such actions are consistent with the requirements of the program under

which site remediation is being addressed.

b)

This Part is to be used in conjunction with the procedures and requirements

applicable to the following programs:

1)

Leaking Underground Storage Tanks (35 Ill. Adm. Code 731, 732, and

734);

2)

Site Remediation Program (35 Ill. Adm. Code 740); and

3) RCRA Part B Permits and Closure Plans (35 Ill. Adm. Code 724 and 725).

c)

The procedures in this Part may not be used if their use would delay response

action to address imminent and substantial threats to human health and the

environment. This Part may only be used after actions to address such threats

have been completed.

d)

This Part may be used to develop remediation objectives to protect surface waters,

sediments or ecological concerns, when consistent with the regulations of other

programs, and as approved by the Agency.

e)

A no further remediation determination issued by the Agency prior to July 1, 1997

pursuant to Section 4(y) of the Act or one of the programs listed in subsection (b)

of this Section that approves completion of remedial action relative to a release

shall remain in effect in accordance with the terms of that determination.

f)

Site specific groundwater remediation objectives determined under this Part for

contaminants of concern may exceed the groundwater quality standards

established pursuant to the rules promulgated under the Illinois Groundwater

---

Protection Act [415 ILCS 55] as long as done in accordance with Sections

742.805 and 742.900(c)(9). (See 415 ILCS 5/58.5(d)(4)

g)

Where contaminants of concern include polychlorinated byphenyls (PCBs), a

person may need to evaluate the applicability of regulations adopted under the

Toxic Substances Control Act (15 U.S.C. 2601).

h)

This Part may not be used in lieu of the procedures and requirements applicable to

landfills under 35 Ill. Adm. Code 807 or 811 through 814.

(Source: Amended at 31 Ill. Reg. 4063, effective February 23, 2007)

Section 742.110

Overview of Tiered Approach

a)

This Part presents an approach for developing remediation objectives (see

Appendix A, Illustrations A and B) that include an option for exclusion of

pathways from further consideration, use of area background concentrations as

remediation objectives and three tiers for selecting applicable remediation

objectives. An understanding of human exposure routes is necessary to properly

conduct an evaluation under this approach. In some cases, applicable human

exposure route(s) can be excluded from further consideration prior to any tier

evaluation. Selecting which tier or combination of tiers to be used to develop

remediation objectives is dependent on the site-specific conditions and

remediation goals. Tier 1 evaluations and Tier 2 evaluations are not prerequisites

to conducting Tier 3 evaluations.

b)

A Tier 1 evaluation compares the concentration of contaminants detected at a site

to the corresponding remediation objectives for residential and

industrial/commercial properties contained in Appendix B, Tables A, B, C, D and

E. To complete a Tier 1 evaluation, the extent and concentrations of the

contaminants of concern, the groundwater class, the land use classification,

human exposure routes at the site, and, if appropriate, soil pH, must be known. If

remediation objectives are developed based on industrial/commercial property

use, then institutional controls under Subpart J are required.

c)

A Tier 2 evaluation uses the risk based equations from the Soil Screening Level

(SSL) and Risk Based Corrective Action (RBCA) documents listed in Appendix

C, Tables A and C, respectively. In addition to the information that is required for

a Tier 1 evaluation, site-specific information is used to calculate Tier 2

remediation objectives. As in Tier 1, Tier 2 evaluates residential and

industrial/commercial properties only. If remediation objectives are developed

based on industrial/commercial property use, then institutional controls under

Subpart J are required.

d)

A Tier 3 evaluation allows alternative parameters and factors, not available under

a Tier 1 or Tier 2 evaluation, to be considered when developing remediation

---

objectives. Remediation objectives developed for conservation and agricultural

properties can only be developed under Tier 3.

e)

Remediation objectives may be developed using area background concentrations

or any of the three tiers if the evaluation is conducted in accordance with

applicable requirements in Subparts D through I. When contaminant

concentrations do not exceed remediation objectives developed under one of the

tiers or area background procedures under Subpart D, further evaluation under

any of the other tiers is not required.

(Source: Amended at 31 Ill. Reg. 4063, effective February 23, 2007)

Section 742.115

Key Elements

To develop remediation objectives under this Part, the following key elements shall be

addressed.

a)

Exposure Routes

1)

This Part identifies the following as potential exposure routes to be

addressed:

A)

Inhalation;

B)

Soil ingestion;

C)

Groundwater ingestion; and

D)

Dermal contact with soil.

2)

The evaluation of exposure routes under subsections (a)(1)(A),(a)(1)(B)

and (a)(1)(C) of this Section is required for all sites when developing

remediation objectives or excluding exposure pathways. Evaluation of the

dermal contact exposure route is required for use of RBCA equations in

Appendix C, Table C or use of formal risk assessment under Section

742.915.

3)

The groundwater ingestion exposure route is comprised of two

components:

A)

Migration from soil to groundwater (soil component); and

B)

Direct ingestion of groundwater (groundwater component).

b)

Contaminants of Concern

---

The contaminants of concern to be remediated depend on the following:

1)

The materials and wastes managed at the site;

2)

The extent of the no further remediation determination being requested

from the Agency pursuant to a specific program; and

3)

The requirements applicable to the specific program, as listed at Section

742.105(b) under which the remediation is being performed.

c)

Land Use

The present and post-remediation uses of the site where exposures may occur

shall be evaluated. The land use of a site, or portion thereof, shall be classified as

one of the following:

1)

Residential property;

2)

Conservation property;

3)

Agricultural property; or

4)

Industrial/commercial property.

Section 742.120

Site Characterization

Characterization of the extent and concentrations of contamination at a site shall be performed

before beginning development of remediation objectives. The actual steps and methods taken to

characterize a site are determined by the requirements applicable to the specific program under

which site remediation is being addressed.

SUBPART B: GENERAL

Section 742.200

Definitions

Except as stated in this Section, or unless a different meaning of a word or term is clear from the

context, the definition of words or terms in this Part shall be the same as that applied to the same

words or terms in the Act.

"Act" means the Illinois Environmental Protection Act [415 ILCS 5] .

"ADL" means Acceptable Detection Limit, which is the detectable concentration

of a substance that is equal to the lowest appropriate Practical Quantitation Limit

(PQL) as defined in this Section.

---

"Agency" means the Illinois Environmental Protection Agency.

"Agricultural Property" means any real property for which its present or post-

remediation use is for growing agricultural crops for food or feed either as

harvested crops, cover crops or as pasture. This definition includes, but is not

limited to, properties used for confinement or grazing of livestock or poultry and

for silviculture operations. Excluded from this definition are farm residences,

farm outbuildings and agrichemical facilities.

“Aquifer” means

saturated (with groundwater) soils and geologic materials

which are sufficiently permeable to readily yield economically useful quantities of

water to wells, springs, or streams under ordinary hydraulic gradients.

(Illinois

Groundwater Protection Act [415 ILCS 55/3(a)])

"Area Background" means

concentrations of regulated substances that are

consistently present in the environment in the vicinity of a site that are the result

of natural conditions or human activities, and not the result solely of releases at

the site

. [415 ILCS 5/58.2]

"ASTM" means the American Society for Testing and Materials.

"Board" means the Illinois Pollution Control Board.

"Cancer Risk" means a unitless probability of an individual developing cancer

from a defined exposure rate and frequency.

"Cap" means a barrier designed to prevent the infiltration of precipitation or other

surface water, or impede the ingestion or inhalation of contaminants.

"Carcinogen" means

a contaminant that is classified as a category A1 or A2

carcinogen by the American Conference of Governmental Industrial Hygienists; a

category

1 or

2A/2B carcinogen by the World Health Organization's International

Agency for Research on Cancer; a "human carcinogen" or "anticipated human

carcinogen" by the United States Department of Health and Human Service

National Toxicological Program; or a category A or B1/B2 carcinogen by the

United States Environmental Protection Agency in the integrated risk information

system or a final rule issued in a Federal Register notice by the USEPA

. [415

ILCS 5/58.2]

"Class I Groundwater" means groundwater that meets the Class I: Potable

Resource Groundwater criteria set forth in 35 Ill. Adm. Code 620.

"Class II Groundwater" means groundwater that meets the Class II: General

Resource Groundwater criteria set forth in 35 Ill. Adm. Code 620.

"Conservation Property" means any real property for which present or post-

remediation use is primarily for wildlife habitat.

---

"Construction Worker" means a person engaged on a temporary basis to perform

work involving invasive construction activities including, but not limited to,

personnel performing demolition, earth-moving, building, and routine and

emergency utility installation or repair activities.

"Contaminant of Concern" or "Regulated Substance of Concern" means

any

contaminant that is expected to be present at the site based upon past and current

land uses and associated releases that are known to the

person conducting a

remediation

based upon reasonable inquiry

[415 ILCS 5/58.2]

“County Highway” means county highway as defined in the Illinois Highway

Code [605 ILCS 5].

“District Road” means district road as defined in the Illinois Highway Code [605

ILCS 5].

"Engineered Barrier" means a barrier designed or verified using engineering

practices that limits exposure to or controls migration of the contaminants of

concern.

"Environmental Land Use Control" means an instrument that meets the

requirements of this Part and is placed in the chain of title to real property that

limits or places requirements upon the use of the property for the purpose of

protecting human health or the environment, is binding upon the property owner,

heirs, successors, assigns, and lessees, and runs in perpetuity or until the Agency

approves, in writing, removal of the limitation or requirement from the chain of

title.

"Exposure Route" means the transport mechanism by which a contaminant of

concern reaches a receptor.

“Federally Owned Property” means real property owned in fee by the United

States of America on which institutional controls are sought to be placed in

accordance with this Subpart.

“Federal Landholding Entity” means that federal department, agency, or

instrumentality with the authority to occupy and control the day-to-day use,

operation and management of Federally Owned Property.

"Free Product" means a contaminant that is present as a non-aqueous phase liquid

for chemicals whose melting point is less than 30° C (e.g., liquid not dissolved in

water).

“GIS” means Geographic Information System.

“GPS” means Global Positioning System.

---

“Groundwater" means underground water which occurs within the saturated zone

and geologic materials where the fluid pressure in the pore space is equal to or

greater than atmospheric pressure.

[415 ILCS 5/3.64]

"Groundwater Quality Standards" means the standards for groundwater as set

forth in 35 Ill. Adm. Code 620.

"Hazard Quotient" means the ratio of a single substance exposure level during a

specified time period to a reference dose for that substance derived from a similar

exposure period.

"Highway"

means any public way for vehicular travel which has been laid out in

pursuance of any law of this State, or of the Territory of Illinois, or which has

been established by dedication, or used by the public as a highway for 15 years,

or which has been or may be laid out and connect a subdivision or platted land

with a public highway and which has been dedicated for the use of the owners of

the land included in the subdivision or platted land where there has been an

acceptance and use under such dedication by such owners, and which has not

been vacated in pursuance of law. The term "highway" includes rights of way,

bridges, drainage structures, signs, guard rails, protective structures and all

other structures and appurtenances necessary or convenient for vehicular traffic.

A highway in a rural area may be called a "road", while a highway in a

municipal area may be called a "street"

. (Illinois Highway Code [605 ILCS 5/2-

202])

"Highway Authority" means

the Department

of Transportation

with respect to a

State highway;

the Illinois State Toll Highway with respect to a toll highway;

the

County Board with respect to a county highway or a county unit district road if a

discretionary function is involved and the County Superintendent of Highways if a

ministerial function is involved; the Highway Commissioner with respect to a

township or district road not in a county unit road district; or the corporate

authorities of a municipality with respect to a municipal street

. (Illinois Highway

Code [605 ILCS 5/2-213])

"Human Exposure Pathway" means a physical condition which may allow for a

risk to human health based on the presence of all of the following: contaminants

of concern; an exposure route; and a receptor activity at the point of exposure that

could result in contaminant of concern intake.

"Industrial/Commercial Property" means any real property that does not meet the

definition of residential property, conservation property or agricultural property.

"Infiltration" means the amount of water entering into the ground as a result of

precipitation.

"Institutional Control" means a legal mechanism for imposing a restriction on land

use, as described in Subpart J.

---

“Land Use Control Memoranda of Agreement” mean agreements entered into

between one or more agencies of the United States and the Illinois Environmental

Protection Agency that limit or place requirements upon the use of Federally

Owned Property for the purpose of protecting human health or the environment.

"Man-Made Pathways" means

constructed

physical conditions

that may allow for

the transport of regulated substances including, but not limited to, sewers, utility

lines, utility vaults, building foundations, basements, crawl spaces, drainage

ditches, or previously excavated and filled areas

. [415 ILCS 5/58.2]

"Natural Pathways" means

natural

physical conditions that may allow

for the

transport of regulated substances including, but not limited to, soil, groundwater,

sand seams and lenses, and gravel seams and lenses

. [415 ILCS 5/58.2]

"Person" means an

individual, trust, firm, joint stock company, joint venture,

consortium, commercial entity, corporation (including a government

corporation), partnership, association, state, municipality, commission, political

subdivision of a state, or any interstate body including the United States

government and each department, agency, and instrumentality of the United

States

. [415 ILCS 5/58.2]

"Point of Human Exposure" means the points at which human exposure to a

contaminant of concern may reasonably be expected to occur. The point of

human exposure is at the source, unless an institutional control limiting human

exposure for the applicable exposure route has been or will be in place, in which

case the point of human exposure will be the boundary of the institutional control.

Point of human exposure may be at a different location than the point of

compliance.

“Populated Area” means

an area within the boundaries of a municipality that has a population of

10,000 or greater based on the year 2000 or most recent census; or

an area less than three miles from the boundary of a municipality that has

a population of 10,000 or greater based on the year 2000 or most recent

census.

“Potable” means

generally fit for human consumption in accordance with

accepted water supply principles and practices.

(Illinois Groundwater Protection

Act [415 ILCS 55/3(h)])

"PQL" means practical quantitation limit or estimated quantitation limit, which is

the lowest concentration that can be reliably measured within specified limits of

precision and accuracy for a specific laboratory analytical method during routine

laboratory operating conditions in accordance with "Test Methods for Evaluating

Solid Wastes, Physical/Chemical Methods", EPA Publication No. SW-846,

incorporated by reference in Section 742.210. When applied to filtered water

---

samples, PQL includes the method detection limit or estimated detection limit in

accordance with the applicable method revision in: "Methods for the

Determination of Organic Compounds in Drinking Water”, Supplement II", EPA

Publication No. EPA/600/4-88/039; "Methods for the Determination of Organic

Compounds in Drinking Water, Supplement III", EPA Publication No.

EPA/600/R-95/131, all of which are incorporated by reference in Section

742.210.

"RBCA" means Risk Based Corrective Action as defined in ASTM E-1739-95, as

incorporated by reference in Section 742.210.

"RCRA" means the Resource Conservation and Recovery Act of 1976 (42 USC

6921).

"Reference Concentration” or “RfC" means an estimate of a daily exposure, in

units of milligrams of chemical per cubic meter of air (mg/m(3)), to the human

population (including sensitive subgroups) that is likely to be without appreciable

risk of deleterious effects during a portion of a lifetime (up to approximately

seven years, subchronic) or for a lifetime (chronic).

"Reference Dose” or “RfD" means an estimate of a daily exposure, in units of

milligrams of chemical per kilogram of body weight per day (mg/kg/d), to the

human population (including sensitive subgroups) that is likely to be without

appreciable risk of deleterious effects during a portion of a lifetime (up to

approximately seven years, subchronic) or for a lifetime (chronic).

"Regulated Substance" means

any hazardous substance as defined under Section

101(14) of the Comprehensive Environmental Response, Compensation, and

Liability Act of 1980 (P.L. 96-510) and petroleum products including crude oil or

any fraction thereof, natural gas, natural gas liquids, liquefied natural gas, or

synthetic gas usable for fuel (or mixtures of natural gas and such synthetic gas)

.

[415 ILCS 5/58.2]

"Residential Property"

means any real property that is used for habitation by

individuals, or

where children have the opportunity for exposure to contaminants

through soil ingestion or inhalation at educational facilities, health care facilities,

child care facilities or outdoor recreational areas. [415 ILCS 5/58.2]

"Right of Way" means

the land, or interest therein, acquired for or devoted to a

highway

. (Illinois Highway Code [605 ILCS 5/2-217])

"Similar-Acting Chemicals" are chemical substances that have toxic or harmful

effect on the same specific organ or organ system (see Appendix A.Tables E and

F for a list of similar-acting chemicals with noncarcinogenic and carcinogenic

effects).

---

"Site" means

any single location, place, tract of land or parcel of property, or

portion thereof, including contiguous property separated by a public right-of-

way

. [415 ILCS 5/58.2]

"Slurry Wall" means a man-made barrier made of geologic material which is

constructed to prevent or impede the movement of contamination into a certain

area.

"Soil Saturation Limit” or “C

sat

" means the contaminant concentration at which

soil pore air and pore water are saturated with the chemical and the adsorptive

limits of the soil particles have been reached.

"Solubility" means a chemical specific maximum amount of solute that can

dissolve in a specific amount of solvent (groundwater) at a specific temperature.

"SPLP" means Synthetic Precipitation Leaching Procedure (Method 1312) as

published in "Test Methods for Evaluating Solid Waste, Physical/Chemical

Methods", USEPA Publication No. SW-846, as incorporated by reference in

Section 742.210.

"SSL" means Soil Screening Levels as defined in USEPA's Soil Screening

Guidance: User's Guide and Technical Background Document, as incorporated by

reference in Section 742.210.

“State highway” means State highway as defined in the Illinois Highway Code

[605 ILCS 5].

"Stratigraphic Unit" means a site-specific geologic unit of native deposited

material and/or bedrock of varying thickness (e.g., sand, gravel, silt, clay,

bedrock, etc.). A change in stratigraphic unit is recognized by a clearly distinct

contrast in geologic material or a change in physical features within a zone of

gradation. For the purposes of this Part, a change in stratigraphic unit is identified

by one or a combination of differences in physical features such as texture,

cementation, fabric, composition, density, and/or permeability of the native

material and/or bedrock.

“Street” means street as defined in the Illinois Highway Code [605 ILCS 5].

"TCLP" means Toxicity Characteristic Leaching Procedure (Method 1311) as

published in "Test Methods for Evaluating Solid Waste, Physical/Chemical

Methods", USEPA Publication No. SW-846, as incorporated by reference in

Section 742.210.

“Toll highway” means toll highway as defined in the Illinois Highway Code [605

ILCS 5].

"Total Petroleum Hydrocarbon” or “TPH" means the additive total of all

petroleum hydrocarbons found in an analytical sample.

---

“Township road” means township road as defined in the Illinois Highway Code

[605 ILCS 5].

"Volatile Organic Compounds” or “VOCs" means organic chemical analytes

identified as volatiles as published in "Test Methods for Evaluating Solid Waste,

Physical/Chemical Methods", USEPA Publication No. SW-846 (incorporated by

reference in Section 742.210), method numbers 8011, 8015B, 8021B, 8031,

8260B, 8315A, and 8316. For analytes not listed in any category in those

methods, those analytes which have a boiling point less than 200

o

C and a vapor

pressure greater than 0.1 Torr (mm Hg) at 20° C.

(Source: Amended at 31 Ill. Reg. 4063, effective February 23, 2007)

Section 742.205

Severability

If any provision of this Part or its application to any person or under any circumstances is

adjudged invalid, such adjudication shall not affect the validity of this Part as a whole or any

portion not adjudged invalid.

Section 742.210

Incorporations by Reference

a)

The Board incorporates the following material by reference:

ASTM. American Society for Testing and Materials, 100 Barr Harbor Drive,

West Conshohocken, PA 19428-2959. (610) 832-9585.

ASTM D 2974-00, Standard Test Methods for Moisture, Ash and Organic

Matter of Peat and Other Organic Soils, approved August 10, 2000.

ASTM D 2488-00, Standard Practice for Description and Identification of

Soils (Visual-Manual Procedure), approved February 10, 2000.

ASTM D 1556-00, Standard Test Method for Density and Unit Weight of

Soil in Place by the Sand-Cone Method, approved March 10, 2000.

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 2922-01, Standard Test Methods for Density of Soil and Soil-

Aggregate in Place by Nuclear Methods (Shallow Depth), approved June

10, 2001.

ASTM D 2937-00e1, Standard Test Method for Density of Soil in Place

by the Drive-Cylinder Method, approved June 10, 2000.

---

ASTM D 854-02, Standard Test Methods for Specific Gravity of Soil

Solids by Water Pycnometer, approved July 10, 2002.

ASTM D 2216-98, Standard Test Method for Laboratory Determination of

Water (Moisture) Content of Soil and Rock by Mass, approved February

10, 1998.

ASTM D 4959-00, Standard Test Method for Determination of Water

(Moisture) Content of Soil by Direct Heating, approved March 10, 2000.

ASTM D 4643-00, Standard Test Method for Determination of Water

(Moisture) Content of Soil by the Microwave Oven Method, approved

February 10, 2000.

ASTM D 5084-03, Standard Test Methods for Measurement of Hydraulic

Conductivity of Saturated Porous Materials Using a Flexible Wall

Permeameter, approved November 1, 2003.

ASTM D 422-63 (2002), Standard Test Method for Particle-Size Analysis

of Soils, approved November 10, 2002.

ASTM D 1140-00, Standard Test Methods for Amount of Material in

Soils Finer than the No. 200 (75

μm)

Sieve, approved June 10, 2000.

ASTM D 3017-01, Standard Test Method for Water Content of Soil and

Rock in Place by Nuclear Methods (Shallow Depth), approved June 10,

2001.

ASTM D 4525-90 (2001), Standard Test Method for Permeability of

Rocks by Flowing Air, approved May 25, 1990.

ASTM D 2487-00, Standard Classification of Soils for Engineering

Purposes (Unified Soil Classification System), approved March 10, 2000.

ASTM E 1527-00, Standard Practice for Environmental Site Assessments:

Phase I Environmental Site Assessment Process, approved May 10, 2000.

Vol. 11.04.

ASTM E 1739-95 (2002), 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, Final Update IIIA,

April 1998), as amended by Updates I, IIA, III, and IIIA (Document No.

955-001-00000-1).

"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 I”, EPA Publication No. EPA/600/4-90/020 (July

1990).

"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).

“Guidance for Data Quality Assessment, Practical Methods for Data

Analysis, EPA QA/G-9, QAOO Update,” EPA/600/R-96/084 (July 2000).

Available at www.epa.gov/quality/qs-docs/g9-final.pdf.

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).

"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.

---

“Calculating Upper Confidence Limits for Exposure Point Concentrations

at Hazardous Waste Sites,” USEPA Office of Emergency and Remedial

Response, OSWER 9285.6-10 (December 2002), PB 2003-104982.

“Exposures Factors Handbook, Vol. I: General Factors”, EPA Publication

No. EPA/600/P-95/002Fa (August 1997).

“Exposures Factors Handbook, Vol. II: Food Ingestion Factors”, EPA

Publication No. EPA/600/P-95/002Fb (August 1997).

“Exposures Factors Handbook, Vol. III: Activity Factors”, EPA

Publication No. EPA/600/P-95/002Fc (August 1997).

"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).

“Risk Assessment Guidance for Superfund, Vol. I: Human Health

Evaluation Manual (Part E, Supplemental Guidance for Dermal Risk

Assessment) Interim”, EPA Publication No. EPA/540/R/99/005

(September 2001).

"Soil Screening Guidance: Technical Background Document", EPA

Publication No. EPA/540/R-95/128, PB 96-963502 (May 1996).

"Soil Screening Guidance: User's Guide", EPA Publication No.

EPA/540/R-96/018, PB 96-963505 (April 1996).

"Superfund Exposure Assessment Manual", EPA Publication No.

EPA/540/1-88/001 (April 1988).

“Supplemental Guidance for Developing Soil Screening Levels for

Superfund Sites”, OSWER Directive 9355.4-24 (December 2002).

---

Polynuclear Aromatic Hydrocarbon Background Study, City of Chicago, Illinois,

Tetra Tech Em Inc., 200 E. Randolph Drive, Suite 4700, Chicago, IL 60601,

February 24, 2003.

Polycyclic Aromatic Hydrocarbons (PAHs) in Surface Soil in Illinois:

Background PAHs, EPRI, Palo Alto, CA, We Energies, Milwaukee, WI, and

IEPA, Springfield, IL: 2004. 1011376. EPRI, 3412 Hillview Avenue, Palo Alto,

CA 94304, (800) 313-3774.

RCRA Facility Investigation Guidance, Interim Final, developed by USEPA

(EPA 530/SW-89-031), 4 volumes (May 1989).

United States Environmental Protection Agency, Office of Environmental

Information (2000). “Guidance for Data Quality Assessment, Practical Methods

for Data Analysis,” EPA QA/G-9, QAOO update. EPA Publication No.

EPA/600/R-96-084. (Available online at

www.epa.gov/oswer/riskassessment/pdf/ucl.pdf).

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 (1998).

c)

This Section incorporates no later editions or amendments.

(Source: Amended at 31 Ill. Reg. 4063, effective February 23, 2007)

Section 742.215

Determination of Soil Attenuation Capacity

a)

The concentrations of organic contaminants of concern remaining in the soil shall

not exceed the attenuation capacity of the soil, as determined under subsection (b)

of this Section.

b)

The soil attenuation capacity is not exceeded if:

1)

The sum of the organic contaminant residual concentrations analyzed for

the purposes of the remediation program for which the analysis is

performed, at each discrete sampling point, is less than the natural organic

carbon fraction of the soil. If the information relative to the concentration

of other organic contaminants is available, such information shall be

included in the sum. The natural organic carbon fraction (f

oc

) shall be

either:

A)

A default value of 6000 mg/kg for soils within the top meter and

2000 mg/kg for soils below one meter of the surface; or

---

B)

A site-specific value as measured by the analytical method

referenced in Appendix C, Table F, multiplied by 0.58 to estimate

the fraction of organic carbon, as stated in, Nelson and Sommers

(1982), as incorporated by reference in Section 742.210;

2)

The total petroleum hydrocarbon concentration is less than the natural

organic carbon fraction of the soil as demonstrated using a method

approved by the Agency. The method selected shall be appropriate for the

contaminants of concern to be addressed; or

3)

Another method, approved by the Agency, shows that the soil attenuation

capacity is not exceeded.

(Source: Amended at 31 Ill. Reg. 4063, effective February 23, 2007)

Section 742.220

Determination of Soil Saturation Limit

a)

For any organic contaminant that has a melting point below 30

o

C, the remediation

objective for the inhalation exposure route developed under Tier 2 shall not

exceed the soil saturation limit, as determined under subsection (c) of this Section.

b)

For any organic contaminant that has a melting point below 30

o

C, the remediation

objective under Tier 2 for the soil component of the groundwater ingestion

exposure route shall not exceed the soil saturation limit, as determined under

subsection (c) of this Section.

c)

The soil saturation limit shall be:

1)

The value listed in Appendix A, Table A for that specific contaminant;

2)

A value derived from Equation S29 in Appendix C, Table A; or

3)

A value derived from another method approved by the Agency.

(Source: Amended at 31 Ill. Reg. 4063, effective February 23, 2007)

Section 742.225

Demonstration of Compliance with Remediation Objectives

Compliance is achieved if each sample result does not exceed that respective remediation

objective unless a person elects to proceed under subsections (c), (d) and (e) of this Section.

a)

Compliance with groundwater remediation objectives developed under Subparts

D through F and H through I shall be demonstrated by comparing the contaminant

concentrations of discrete samples at each sample point to the applicable

---

groundwater remediation objective. Sample points shall be determined by the

program under which remediation is performed.

b)

Unless the person elects to composite samples or average sampling results as

provided in subsections (c) and (d) of this Section, compliance with soil

remediation objectives developed under Subparts D through G and I shall be

demonstrated by comparing the contaminant concentrations of discrete samples to

the applicable soil remediation objective.

1)

Except as provided in subsections (c) and (d) of this Section, compositing

of samples is not allowed.

2)

Except as provided in subsections (c) and (d) of this Section, averaging of

sample results is not allowed.

3)

Notwithstanding subsections (c) and (d) of this Section, compositing of

samples and averaging of sample results is not allowed for the

construction worker population.

4)

The number of sampling points required to demonstrate compliance is

determined by the requirements applicable to the program under which

remediation is performed.

c)

If a person chooses to composite soil samples or average soil sample results to

demonstrate compliance relative to the soil component of the groundwater

ingestion exposure route, the following requirements apply:

1)

A minimum of two sampling locations for every 0.5 acre of contaminated

area is required, with discrete samples at each sample location obtained at

every two feet of depth, beginning at six inches below the ground surface

for surface contamination and at the upper limit of contamination for

subsurface contamination and continuing through the zone of

contamination. Alternatively, a sampling method may be approved by the

Agency based on an appropriately designed site-specific evaluation.

Samples obtained at or below the water table shall not be used in

compositing or averaging.

2)

For contaminants of concern other than volatile organic contaminants:

A)

Discrete samples from the same boring may be composited; or

B)

Discrete sample results from the same boring may be averaged.

3)

For volatile organic contaminants:

A)

Compositing of samples is not allowed.

B)

Discrete sample results from the same boring may be averaged.

---

4)

Composite samples may not be averaged. An arithmetic average may be

calculated for discrete samples collected at every two feet of depth

through the zone of contamination as specified above in subsection (c)(1)

of this Section.

d)

If a person chooses to composite soil samples or average soil sample results to

demonstrate compliance relative to the inhalation exposure route or ingestion

exposure route, the following requirements apply:

1)

A person shall submit a sampling plan for Agency approval, based upon a

site-specific evaluation;

2)

For volatile organic compounds, compositing of samples is not allowed;

and

3)

All samples shall be collected within the contaminated area.

4)

Composite samples may not be averaged. Procedures specified in

“Calculating Upper Confidence Limits for Exposure Point Concentrations

at Hazardous Waste Sites”, USEPA Office of Emergency and Remedial

Response, OSWER 9285.6-10 (December 2002), as incorporated by

reference in Section 742.210, or an alternative procedure approved by the

Agency, shall be used to determine sample averages.

e)

When averaging under this Section, if no more than 15% of sample results are

reported as "non-detect", "no contamination", "below detection limits", or similar

terms, such results shall be included in the averaging calculations as one-half the

reported analytical detection limit for the contaminant. However, when

performing a test for normal or lognormal distribution for the purpose of

calculating a 95% Upper Confidence Limit of the mean for a contaminant, a

person may substitute for each non-detect value a randomly generated value

between, but not including, zero and the reported analytical detection limit. If

more than 15% of sample results are "non-detect", procedures specified in

“Guidance for Data Quality Assessment, Practical Methods for Data Analysis,

EPA QA/G-9, QA00 Update”, EPA/600/R-96/084 (July 2000), as incorporated by

reference in Section 742.210, or an alternative procedure approved by the Agency

shall be used to address the non-detect values, or

another statistically valid

procedure approved by the Agency may be used to determine an average.

f)

All soil samples collected after August 15, 2001, shall be reported on a dry weight

basis for the purpose of demonstrating compliance, with the exception of the

TCLP and SPLP and the property pH.

(Source: Amended at 31 Ill. Reg. 4063, effective February 23, 2007)

Section 742.230

Agency Review and Approval

---

a)

Documents and requests filed with the Agency under this Part shall be submitted

in accordance with the procedures applicable to the specific program under which

remediation is performed.

b)

Agency review and approval of documents and requests under this Part shall be

performed in accordance with the procedures applicable to the specific program

under which the remediation is performed.

SUBPART C: EXPOSURE ROUTE EVALUATIONS

Section 742.300

Exclusion of Exposure Route

a)

This Subpart sets forth requirements to demonstrate that an actual or potential

impact to a receptor or potential receptor from a contaminant of concern can be

excluded from consideration from one or more exposure routes. If an evaluation

under this Subpart demonstrates the applicable requirements for excluding an

exposure route are met, then the exposure route is excluded from consideration

and no remediation objective(s) need be developed for that exposure route.

b)

No exposure route may be excluded from consideration until characterization of

the extent and concentrations of contaminants of concern at a site has been

performed. The actual steps and methods taken to characterize a site shall be

determined by the specific program requirements under which the site

remediation is being addressed.

c)

As an alternative to the use of the requirements in this Subpart, a person may use

the procedures for evaluation of exposure routes under Tier 3 as set forth in

Section 742.925.

(Source: Amended at 25 Ill. Reg. 10374, effective August 15, 2001)

Section 742.305

Contaminant Source and Free Product Determination

No exposure route shall be excluded from consideration relative to a contaminant of concern

unless the following requirements are met:

a)

The sum of the concentrations of all organic contaminants of concern shall not

exceed the attenuation capacity of the soil as determined under Section 742.215;

b)

The concentrations of any organic contaminants of concern remaining in the soil

shall not exceed the soil saturation limit as determined under Section 742.220;

c)

Any soil which contains contaminants of concern shall not exhibit any of the

characteristics of reactivity for hazardous waste as determined under 35 Ill. Adm.

Code 721.123;

---

d)

Any soil which contains contaminants of concern shall not exhibit a pH less than

or equal to 2.0 or greater than or equal to 12.5, as determined by SW-846 Method

9040B: pH Electrometric for soils with 20% or greater aqueous (moisture) content

or by SW-846 Method 9045C: Soil pH for soils with less than 20% aqueous

(moisture) content as incorporated by reference in Section 742.210;

e)

Any soil which contains contaminants of concern in the following list of inorganic

chemicals or their salts shall not exhibit any of the characteristics of toxicity for

hazardous waste as determined by 35 Ill. Adm. Code 721.124: arsenic, barium,

cadmium, chromium, lead, mercury, selenium or silver; and

f)

If contaminants of concern include polychlorinated biphenyls (PCBs), the

concentration of any PCBs in the soil shall not exceed 50 parts per million as

determined by SW-846 Methods.

(Source: Amended at 31 Ill. Reg. 4063, effective February 23, 2007)

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;

b)

An approved engineered barrier is in place that meets the requirements of Subpart

K;

c)

Safety precautions for the construction worker are taken if the Tier 1 construction

worker remediation objectives are exceeded; and

d)

An institutional control, in accordance with Subpart J, will be placed on the

property.

(Source: Amended at 25 Ill. Reg. 10374, effective August 15, 2001)

Section 742.315

Soil Ingestion Exposure Route

The soil ingestion exposure route may be excluded from consideration if:

a)

The requirements of Sections 742.300 and 742.305 are met;

b)

An approved engineered barrier is in place that meets the requirements of Subpart

K;

c)

Safety precautions for the construction worker are taken if the Tier 1 construction

worker remediation objectives are exceeded; and

---

d)

An institutional control, in accordance with Subpart J, will be placed on the

property.

(Source: Amended at 25 Ill. Reg. 10374, effective August 15, 2001)

Section 742.320

Groundwater Ingestion Exposure Route

The groundwater ingestion exposure route may be excluded from consideration if:

a)

The requirements of Sections 742.300 and 742.305 are met;

b)

The corrective action measures have been completed to remove any free product

to the maximum extent practicable;

c)

The source of the release is not located within the minimum or designated

maximum setback zone or within a regulated recharge area of a potable water

supply well;

d)

As demonstrated in accordance with Section 742.1015, for any area within the

measured and modeled extent of groundwater contamination above what would

otherwise be the applicable Tier 1 groundwater remediation objectives, an

ordinance adopted by a unit of local government is in place that effectively

prohibits the installation of potable water supply wells (and the use of such wells);

e)

As demonstrated using Equation R26, in Appendix C, Table C, in accordance

with Section 742.810, the concentration of any contaminant of concern in

groundwater within the minimum or designated maximum setback zone of an

existing potable water supply well will meet the applicable Tier 1 groundwater

remediation objective; and

f)

As demonstrated using Equation R26, in Appendix C, Table C, in accordance

with Section 742.810, the concentration of any contaminant of concern in

groundwater discharging into a surface water will meet the applicable surface

water quality standard under 35 Ill. Adm. Code 302.

(Source: Amended at 31 Ill. Reg. 4063, effective February 23, 2007)

SUBPART D: DETERMINING AREA BACKGROUNDS

Section 742.400

Area Background

This Subpart provides procedures for determining area background concentrations for

contaminants of concern. Except as described in Section 742.415(c) and (d) of this Subpart, area

background concentrations may be used as remediation objectives for contaminants of concern at

a site.

---

Section 742.405

Determination of Area Background for Soil

a)

Soil sampling results shall be obtained for purposes of determining area

background levels in accordance with the following procedures:

1)

For volatile organic contaminants, sample results shall be based on

discrete samples;

2)

Unless an alternative method is approved by the Agency, for contaminants

other than volatile organic contaminants, sample results shall be based on

discrete samples or composite samples. If a person elects to use

composite samples, each 0.5 acre of the area to be sampled shall be

divided into quadrants and 5 aliquots of equal volume per quadrant shall

be composited into 1 sample;

3)

Samples shall be collected from similar depths and soil types, which shall

be consistent with the depths and soil types in which maximum levels of

contaminants are found in the areas of known or suspected releases; and

4)

Samples shall be collected from areas of the site or adjacent to the site that

are unaffected by known or suspected releases at or from the site. If the

sample results show an impact from releases at or from the site, then the

sample results shall not be included in determining area background levels

under this Part.

b)

Area background shall be determined according to one of the following

approaches:

1)

Statewide Area Background Approach:

A)

The concentrations of inorganic chemicals in background soils

listed in Appendix A, Table G may be used as the upper limit of

the area background concentration for the site. The first column to

the right of the chemical name presents inorganic chemicals in

background soils for counties within Metropolitan Statistical

Areas. Counties within Metropolitan Statistical Areas are

identified in Appendix A, Table G, Footnote a. Sites located in

counties outside Metropolitan Statistical Areas shall use the

concentrations of inorganic chemicals in background soils shown

in the second column to the right of the chemical name.

B)

Soil area background concentrations determined according to this

statewide area background approach shall be used as provided in

Section 742.415(b) of this Part. For each parameter whose

---

sampling results demonstrate concentrations above those in

Appendix A, Table G, the person shall develop appropriate soil

remediation objectives in accordance with this Part, or may

determine area background in accordance with subsection (b)(2) of

this Section.

2)

A statistically valid approach for determining area background

concentrations appropriate for the characteristics of the data set, and

approved by the Agency.

Section 742.410

Determination of Area Background for Groundwater

a)

Groundwater sampling results shall be obtained for purposes of determining area

background in accordance with the following procedures:

1)

Samples shall be collected from areas of the site or adjacent to the site that

are unaffected by releases at the site;

2)

The background monitoring wells shall be sufficient in number to account

for the spatial and temporal variability, size, and number of known or

suspected off-site releases of contaminants of concern, and the

hydrogeological setting of the site;

3)

The samples shall be collected in consecutive quarters for a minimum of

one year for each well unless another sample schedule is approved by the

Agency;

4)

The samples shall be collected from the same stratigraphic unit(s) as the

groundwater contamination at the site; and

5)

The background monitoring wells shall be located hydraulically

upgradient from the release(s) of contaminants of concern, unless a person

demonstrates to the Agency that the upgradient location is undefinable or

infeasible.

b)

Area background shall be determined according to one of the following

approaches:

1)

Prescriptive Approach:

A)

If more than 15% of the groundwater sampling results for a

chemical obtained in accordance with subsection (a) of this Section

are less than the appropriate detection limit for that chemical, the

Prescriptive Approach may not be used for that chemical. If 15%

or less of the sampling results are less than the appropriate

---

detection limit, a concentration equal to one-half the detection limit

shall be used for that chemical in the calculations contained in this

Prescriptive Approach.

B)

The groundwater sampling results obtained in accordance with

subsection (a) of this Section shall be used to determine if the

sample set is normally distributed. The Shapiro-Wilk Test of

Normality shall be used to determine whether the sample set is

normally distributed, if the sample set for the background well(s)

contains 50 or fewer samples. Values necessary for the Shapiro-

Wilk Test of Normality shall be determined using Appendix A,

Tables C and D. If the computed value of W is greater than the 5%

Critical Value in Appendix A, Table D, the sample set shall be

assumed to be normally distributed, and the Prescriptive Approach

is allowed. If the computed value of W is less than 5% Critical

Value in Appendix A, Table D, the sample set shall be assumed to

not be normally distributed, and the Prescriptive Approach shall

not be used.

C)

If the sample set contains at least ten sample results, the Upper

Tolerance Limit (UTL) of a normally distributed sample set may

be calculated using the mean (x) and standard deviation(s), from:

UTL = x + (K

•

s),

where K = the one-sided normal tolerance factor for

estimating the 95% upper confidence limit of the 95th

percentile of a normal distribution. Values for K shall be

determined using Appendix A, Table B.

D)

If the sample set contains at least ten sample results, the UTL shall

be the upper limit of the area background concentration for the site.

If the sample set contains fewer than ten sample results, the

maximum value of the sample set shall be the upper limit of the

area background concentration for the site.

E)

This Prescriptive Approach shall not be used for determining area

background for the parameter pH.

2)

Another statistically valid approach for determining area background

concentrations appropriate for the characteristics of the data set, and

approved by the Agency.

---

Section 742.415

Use of Area Background Concentrations

a)

A person may request that area background concentration 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;

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 31 Ill. Reg. 4063, effective February 23, 2007)

SUBPART E: TIER 1 EVALUAION

Section 742.500

Tier 1 Evaluation Overview

a)

A Tier 1 evaluation compares the concentration of each contaminant of concern

detected at a site to the baseline remediation objectives provided in Appendix B,

Tables A, B, C, D and E. Use of Tier 1 remediation objectives requires only

---

limited site-specific information: concentrations of contaminants of concern,

groundwater classification, land use classification, and, if appropriate, soil pH.

(See Appendix B, Illustration A.)

b)

Although Tier 1 allows for differentiation between residential and

industrial/commercial property use of a site, an institutional control under Subpart

J is required where remediation objectives are based on an industrial/commercial

property use.

c)

Any given exposure route is not a concern if the concentration of each

contaminant of concern detected at the site is below the Tier 1 value of that given

route. In such a case, no further evaluation of that route is necessary.

Section 742.505

Tier 1 Soil and Groundwater Remediation Objectives

a)

Soil

1)

Inhalation Exposure Route

A)

The Tier 1 soil remediation objectives for this exposure route

based upon residential property use are listed in Appendix B, Table

A.

B)

The Tier 1 soil remediation objectives for this exposure route

based upon industrial/commercial property use are listed in

Appendix B, Table B. Soil remediation objective determinations

relying on this table require use of institutional controls in

accordance with Subpart J.

2)

Ingestion Exposure Route

A)

The Tier 1 soil remediation objectives for this exposure route

based upon residential property use are listed in Appendix B, Table

A.

B)

The Tier 1 soil remediation objectives for this exposure route

based upon industrial/commercial property use are listed in

Appendix B, Table B. Soil remediation objective determinations

relying on this table require use of institutional controls in

accordance with Subpart J.

3)

Soil Component of the Groundwater Ingestion Route

---

A)

The Tier 1 soil remediation objectives for this exposure route

based upon residential property use are listed in Appendix B, Table

A.

B)

The Tier 1 soil remediation objectives for this exposure route

based upon industrial/commercial property use are listed in

Appendix B, Table B.

C)

The pH-dependent Tier 1 soil remediation objectives for identified

ionizable organics or inorganics for the soil component of the

groundwater ingestion exposure route (based on the total amount

of contaminants present in the soil sample results and groundwater

classification) are provided in Appendix B, Tables C and D.

D)

Values used to calculate the Tier 1 soil remediation objectives for

this exposure route are listed in Appendix B, Table F.

4)

Evaluation of the dermal contact with soil exposure route is not required

under Tier 1.

b)

Groundwater

1)

The Tier 1 groundwater remediation objectives for the groundwater

component of the groundwater ingestion route are listed in Appendix B,

Table E.

2)

The Tier 1 groundwater remediation objectives for this exposure route are

given for Class I and Class II groundwaters, respectively.

3)

The evaluation of 35 Ill. Adm. Code 620.615 regarding mixtures of

similar-acting chemicals shall be considered satisfied for Class I

groundwater at the point of human exposure if:

A)

No more than one similar-acting noncarcinogenic chemical as

listed in Appendix A, Table E is detected in the groundwater at the

site; and

B)

No carcinogenic contaminant of concern as listed in Appendix A,

Table I is detected in any groundwater sample associated with the

site, using analytical procedures capable of achieving either the 1

in 1,000,000 cancer risk concentration or the ADL, whichever is

greater.

4)

If the conditions of subsection (b)(3) of this Section are not met, the Class

I groundwater remediation objectives set forth in Appendix B, Table E

---

shall be corrected for the cumulative effect of mixtures of similar-acting

chemicals using the following methodologies:

A)

For noncarcinogenic chemicals, the methodologies set forth at

Section 742.805(c) or Section 742.915(h) shall be used; and

B)

For carcinogenic chemicals, the methodologies set forth at Section

742.805(d) or Section 742.915(h) shall be used.

(SOURCE: Amended at 31 Ill. Reg. 4063, effective February 23, 2007)

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.

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.

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 9.0, 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 cumulative effect of

mixtures of similar-acting noncarcinogenic chemicals as set forth in Section

742.505(b)(3).

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 31 Ill. Reg. 4063, effective February 23, 2007)

SUBPART F: TIER 2 GENERAL EVALUATION

Section 742.600

Tier 2 Evaluation Overview

a)

Tier 2 remediation objectives are developed through the use of equations which

allow site-specific data to be used. (See Appendix C, Illustrations A and B.) The

equations, identified in Appendix C, Tables A and C may be used to develop Tier

2 remediation objectives.

b)

Tier 2 evaluation is only required for contaminants of concern and corresponding

exposure routes (except where excluded from further consideration under Subpart

---

C) exceeding the Tier 1 remediation objectives. When conducting Tier 2

evaluations, the values used in the calculations must have the appropriate units of

measure as identified in Appendix C, Tables B and D.

c)

Any development of remediation objectives using site-specific information or

equations outside the Tier 2 framework shall be evaluated under Tier 3.

d)

Any development of a remediation objective under Tier 2 shall not use a target

hazard quotient greater than one at the point of human exposure or a target cancer

risk greater than 1 in 1,000,000 at the point of human exposure.

e)

In conducting a Tier 2 evaluation, the following conditions shall be met:

1)

For each discrete sample, the total soil contaminant concentration of either

a single contaminant or multiple contaminants of concern shall not exceed

the attenuation capacity of the soil as provided in Section 742.215.

2)

Remediation objectives for noncarcinogenic compounds which affect the

same target organ, organ system or similar mode of action shall meet the

requirements of Section 742.720.

3)

The soil remediation objectives based on the inhalation and the soil

component of the groundwater ingestion exposure routes shall not exceed

the soil saturation limit as provided in Section 742.220.

f)

If the calculated Tier 2 soil remediation objective for an applicable exposure route

is more stringent than the corresponding Tier 1 remediation objective, then the

Tier 1 remediation objective applies.

g)

If the calculated Tier 2 soil remediation objective for an exposure route is more

stringent than the Tier 1 soil remediation objective(s) for the other exposure

routes, then the Tier 2 calculated soil remediation objective applies and Tier 2 soil

remediation objectives for the other exposure routes are not required.

h)

If the calculated Tier 2 soil remediation objective is less stringent than one or

more of the soil remediation objectives for the remaining exposure routes, then

the Tier 2 values are calculated for the remaining exposure route(s) and the most

stringent Tier 2 calculated value applies.

Section 742.605

Land Use

a)

Present and post-remediation land use is evaluated in a Tier 2 evaluation.

Acceptable exposure factors for the Tier 2 evaluation for residential,

industrial/commercial, and construction worker populations are provided in the

far right column of Appendix C, Tables B and D. Use of exposure factors

---

different from those in Appendix C, Tables B and D must be approved by the

Agency as part of a Tier 3 evaluation.

b)

If a Tier 2 evaluation is based on an industrial/commercial property use, then:

1)

Construction worker populations shall also be evaluated; and

2)

Institutional controls are required in accordance with Subpart J.

(Source: Amended at 25 Ill. Reg. 10374, effective August 15, 2001)

Section 742.610

Chemical and Site Properties

a)

Physical and Chemical Properties of Contaminants

Tier 2 evaluations require information on the physical and chemical properties of

the contaminants of concern. The physical and chemical properties used in a Tier

2 evaluation are contained in Appendix C, Table E. If the site has contaminants

not included in this table, a person may request the Agency to provide the

applicable physical and chemical input values or may propose input values under

Subpart I. If a person proposes to apply values other than those in Appendix C,

Table E, or those provided by the Agency, the evaluation shall be considered

under Tier 3.

b)

Soil and Groundwater Parameters

1)

A Tier 2 evaluation requires examination of soil and groundwater

parameters. The parameters that may be varied, and the conditions under

which these parameters are determined as part of Tier 2, are summarized

in Appendix C, Tables B and D. If a person proposes to vary site-specific

parameters outside of the framework of these tables, the evaluation shall

be considered under Tier 3.

2)

To determine site-specific physical soil parameters, a minimum of one

boring per 0.5 acre of contamination shall be collected. This boring must

be deep enough to allow the collection of the required field measurements.

The site-specific physical soil parameters must be determined from the

portion of the boring representing the stratigraphic unit(s) being evaluated.

For example, if evaluating the soil component of the groundwater

ingestion exposure route, two samples from the boring will be required:

A)

A sample of the predominant soil type for the vadose zone; and

B)

A sample of the predominant soil type for the saturated zone.

---

3)

A site-specific SSL dilution factor (used in developing soil remediation

objectives based upon the protection of groundwater) may be determined

by substituting site information in Equation S22 in Appendix C, Table A.

To make this demonstration, a minimum of three monitoring wells shall be

used to determine the hydraulic gradient. As an alternative, the default

dilution factor value listed in Appendix C, Table B may be used. If

monitoring wells are used to determine the hydraulic gradient, the soil

taken from the borings shall be visually inspected to ensure there are no

significant differences in the stratigraphy. If there are similar soil types in

the field, one boring shall be used to determine the site-specific physical

soil parameters. If there are significant differences, all of the borings shall

be evaluated before determining the site-specific physical soil parameters

for the site.

4)

Not all of the parameters identified in Appendix C, Tables B and D need

to be determined on a site-specific basis. A person may choose to collect

partial site-specific information and use default values as listed in

Appendix C, Tables B and D for the rest of the parameters.

SUBPART G: TIER 2 SOIL EVALUATION

Section 742.700

Tier 2 Soil Evaluation Overview

a)

Tier 2 remediation objectives are developed through the use of models which

allow site-specific data to be considered. Appendix C, Tables A and C list

equations that shall be used under a Tier 2 evaluation to calculate soil remediation

objectives prescribed by SSL and RBCA models, respectively. (See also

Appendix C, Illustration A.)

b)

Appendix C, Table A lists equations that are used under the SSL model. (See also

Appendix C, Illustration A.) The SSL model has equations to evaluate the

following human exposure routes:

1)

Soil ingestion exposure route;

2)

Inhalation exposure route for:

A)

Organic contaminants;

B)

Fugitive dust; and

3)

Soil component of the groundwater ingestion exposure route.

c)

Evaluation of the dermal exposure route is not required under the SSL model.

---

d)

Appendix C, Table C lists equations that are used under the RBCA model. (See

also Appendix C, Illustration A.) The RBCA model has equations to evaluate

human exposure based on the following:

1)

The combined exposure routes of inhalation of vapors and particulates,

soil ingestion and dermal contact with soil;

2)

The ambient vapor inhalation (outdoor) route from subsurface soils;

3)

Soil component of the groundwater ingestion route; and

4)

Groundwater ingestion exposure route.

e)

The equations in either Appendix C, Table A or C may be used to calculate

remediation objectives for each contaminant of concern under Tier 2, if the

following requirements are met:

1)

The Tier 2 soil remediation objectives for the ingestion and inhalation

exposure routes shall use the applicable equations from the same approach

(i.e., SSL equations in Appendix C, Table C).

2)

The equations used to calculate soil remediation objectives for the soil

component of the groundwater ingestion exposure route are not dependent

on the approach utilized to calculate soil remediation objectives for the

other exposure routes. For example, it is acceptable to use the SSL

equations for calculating Tier 2 soil remediation objectives for the

ingestion and inhalation exposure routes, and the RBCA equations for

calculating Tier 2 soil remediation objectives for the soil component of the

groundwater ingestion exposure route.

3)

Combining equations from Appendix C, Tables A and C to form a new

model is not allowed. In addition, Appendix C, Tables A and C must use

their own applicable parameters identified in Appendix C, Tables B and

D, respectively.

f)

In calculating soil remediation objectives for industrial/commercial property use,

applicable calculations shall be performed twice: once using

industrial/commercial population default values and once using construction

worker population default values. The more stringent soil remediation objectives

derived from these calculations must be used for further Tier 2 evaluations.

g)

Tier 2 data sheets provided by the Agency shall be used to present calculated Tier

2 remediation objectives, if required by the particular program for which

remediation is being performed.

h)

The RBCA equations which rely on the parameter Soil Water Sorption

Coefficient (k

s

) can only be used for ionizing organics and inorganics by

---

substituting values for k

s

from Appendix C, Tables I and J, respectively. This will

also require the determination of a site-specific value for soil pH.

(Source: Amended at 25 Ill. Reg. 10374, effective August 15, 2001)

Section 742.705

Parameters for Soil Remediation Objective Equations

a)

Appendix C, Tables B and D list the input parameters for the SSL and RBCA

equations, respectively. The first column lists each symbol as it is presented in

the equation. The next column defines the parameters. The third column shows

the units for the parameters. The fourth column identifies where information on

the parameters can be obtained (i.e., field measurement, applicable equation(s),

reference source, or default value). The last column identifies how the parameters

can be generated.

b)

Default Values

Default values are numerical values specified for use in the Tier 2 equations. The

fourth column of Appendix C, Tables B and D denotes if the default values are

from the SSL model, RBCA model, or some other source. The last column of

Appendix C, Tables B and D lists the numerical values for the default values used

in the SSL and RBCA equations, respectively.

c)

Site-specific Information

Site-specific information is a parameter measured, obtained, or determined from

the site to calculate Tier 2 remediation objectives. The fourth column of

Appendix C, Tables B and D identifies those site-specific parameters that may

require direct field measurement. For some parameters, numerical default inputs

have been provided in the last column of Appendix C, Tables B and D to

substitute for site-specific information. In some cases, information on the

receptor or soil type is required to select the applicable numerical default inputs.

Site-specific information includes:

1)

Physical soil parameters identified in Appendix C, Table F. The second

column identifies the location where the sample is to be collected.

Acceptable methods for measuring or calculating these soil parameters are

identified in the last column of Appendix C, Table F;

2)

Institutional controls or engineered barriers, pursuant to Subparts J and K,

describe applicable institutional controls and engineered barriers under a

Tier 2 evaluation; and

3)

Land use classification

---

d)

Toxicological-specific Information

1)

Toxicological-specific information is used to calculate Tier 2 remediation

objectives for the following parameters, if applicable:

A)

Oral Chronic Reference Dose (RfD

o

, expressed in mg/kg-d);

B)

Oral Subchronic Reference Dose (RfD

s

, expressed in mg/kg-d,

shall be used for construction worker remediation objective

calculations);

C)

Oral Slope Factor (SF

o

, expressed in (mg/kg-d)

-1

);

D)

Inhalation Unit Risk Factor (URF expressed in (μg/m

3

)

-1

);

E)

Inhalation Chronic Reference Concentration (RfC, expressed in

mg/m

3

);

F)

Inhalation Subchronic Reference Concentration (RfC

s

, expressed

in mg/m

3

, shall be used for construction worker remediation

objective calculations);

G)

Inhalation Chronic Reference Dose (RfD

i

, expressed in mg/kg-d);

H)

Inhalation Subchronic Reference Dose (RfD

is

, expressed in mg/kg-

d, shall be used for construction worker remediation objective

calculations); and

I)

Inhalation Slope Factor (SF

i

, expressed in (mg/kg-d)

-1

);

2)

Toxicological information can be obtained from IRIS, as incorporated by

reference in Section 742.210, or the program under which the remediation

is being performed.

e)

Chemical-specific Information

Chemical-specific information used to calculate Tier 2 remediation objectives is

listed in Appendix C, Table E.

f)

Calculations

Calculating numerical values for some parameters requires the use of equations

listed in Appendix C, Table A or C. The parameters that are calculated are listed

in Appendix C, Tables B and D.

---

Section 742.710

SSL Soil Equations

a)

This Section sets forth the equations and parameters used to develop Tier 2 soil

remediation objectives for the three exposure routes using the SSL approach.

b)

Soil Ingestion Exposure Route

1)

Equations S1 through S3 form the basis for calculating Tier 2 remediation

objectives for the soil ingestion exposure route using the SSL approach.

Equation S1 is used to calculate soil remediation objectives for

noncarcinogenic contaminants. Equations S2 and S3 are used to calculate

soil remediation objectives for carcinogenic contaminants for residential

populations and industrial/commercial and construction worker

populations, respectively.

2)

For Equations S1 through S3, the SSL default values cannot be modified

with site-specific information.

c)

Inhalation Exposure Route

1)

Equations S4 through S16, S26 and S27 are used to calculate Tier 2 soil

remediation objectives for the inhalation exposure route using the SSL

approach. To address this exposure route, organic contaminants and

mercury must be evaluated separately from fugitive dust using their own

equations set forth in subsections (c)(2) and (c)(3) of this Section,

respectively.

2)

Organic Contaminants

A)

Equations S4 through S10 are used to calculate Tier 2 soil

remediation objectives for organic contaminants and mercury

based on the inhalation exposure route. Equation S4 is used to

calculate soil remediation objectives for noncarcinogenic organic

contaminants in soil for residential and industrial/commercial

populations. Equation S5 is used to calculate soil remediation

objectives for noncarcinogenic organic contaminants and mercury

in soil for construction worker populations. Equation S6 is used to

calculate soil remediation objectives for carcinogenic organic

contaminants in soil for residential and industrial/commercial

populations. Equation S7 is used to calculate soil remediation

objectives for carcinogenic organic contaminants in soil for

construction worker populations. Equations S8 through S10, S27

and S28 are used for calculating numerical values for some of the

parameters in Equations S4 through S7.

---

B)

For Equation S4, a numerical value for the Volatilization Factor

(VF) can be calculated in accordance with subsection (c)(2)(F) of

this Section. The remaining parameters in Equation S4 have either

SSL default values listed in Appendix C, Table B or toxicological-

specific information (i.e., RfC), which can be obtained from IRIS

or requested from the program under which the remediation is

being performed.

C)

For Equation S5, a numerical value for the Volatilization Factor

adjusted for Agitation (VF') can be calculated in accordance with

subsection (c)(2)(G) of this Section. The remaining parameters in

Equation S5 have either SSL default values listed in Appendix C,

Table B or toxicological-specific information (i.e., RfC), which

can be obtained from IRIS or requested from the program under

which the remediation is being performed.

D)

For Equation S6, a numerical value for VF can be calculated in

accordance with subsection (c)(2)(F) of this Section. The

remaining parameters in Equation S6 have either default values

listed in Appendix C, Table B or toxicological-specific information

(i.e., URF), which can be obtained from IRIS or requested from the

program under which the remediation is being performed.

E)

For Equation S7, a numerical value for VF' can be calculated in

accordance with subsection (c)(2)(G) of this Section. The

remaining parameters in Equation S7 have either default values

listed in Appendix C, Table B or toxicological-specific information

(i.e., URF), which can be obtained from IRIS or requested from the

program under which the remediation is being performed.

F)

The VF can be calculated for residential and industrial/commercial

populations using one of the following equations based on the

information known about the contaminant source and receptor

population:

i)

Equation S8, in conjunction with Equation S10, is used to

calculate VF assuming an infinite source of contamination;

or

ii)

If the area and depth of the contaminant source are known

or can be estimated reliably, mass limit considerations may

be used to calculate VF using Equation S26.

G)

The VF' can be calculated for the construction worker populations

using one of the following equations based on the information

known about the contaminant source:

---

i)

Equation S9 is used to calculate VF' assuming an infinite

source of contamination; or

ii)

If the area and depth of the contaminant source are known

or can be estimated reliably, mass limit considerations may

be used to calculate VF' using Equation S27.

3)

Fugitive Dust

A)

Equations S11 through S16 are used to calculate Tier 2 soil

remediation objectives using the SSL fugitive dust model for the

inhalation exposure route. Equation S11 is used to calculate soil

remediation objectives for noncarcinogenic contaminants in

fugitive dust for residential and industrial/commercial populations.

Equation S12 is used to calculate soil remediation objectives for

noncarcinogenic contaminants in fugitive dust for construction

worker populations. Equation S13 is used to calculate soil

remediation objectives for carcinogenic contaminants in fugitive

dust for residential and industrial/commercial populations.

Equation S14 is used to calculate soil remediation objectives for

carcinogenic contaminants in fugitive dust for construction worker

populations. Equations S15 and S16 are used for calculating

numerical quantities for some of the parameters in Equations S11

through S14.

B)

For Equation S11, a numerical value can be calculated for the

Particulate Emission Factor (PEF) using Equation S15. This

equation relies on various input parameters from a variety of

sources. The remaining parameters in Equation S11 have either

SSL default values listed in Appendix C, Table B or toxicological-

specific information (i.e., RfC), which can be obtained from IRIS

or requested from the program under which the remediation is

being performed.

C)

For Equation S12, a numerical value for the Particulate Emission

Factor for Construction Worker (PEF') can be calculated using

Equation S16. The remaining parameters in Equation S12 have

either SSL default values listed in Appendix C, Table B or

toxicological-specific information (i.e., RfC), which can be

obtained from IRIS or requested from the program under which the

remediation is being performed.

D)

For Equation S13, a numerical value for PEF can be calculated

using Equation S15. The remaining parameters in Equation S13

have either default values listed in Appendix C, Table B or

toxicological-specific information (i.e., URF), which can be

---

obtained from IRIS or requested from the program under which the

remediation is being performed.

E)

For Equation S14, a numerical value for PEF' can be calculated

using Equation S16. The remaining parameters in Equation S14

have either default values listed in Appendix C, Table B or

toxicological-specific information (i.e., URF), which can be

obtained from IRIS or requested from the program under which the

remediation is being performed.

d)

Soil Component of the Groundwater Ingestion Exposure Route

The Tier 2 remediation objective for the soil component of the groundwater

ingestion exposure route can be calculated using one of the following equations

based on the information known about the contaminant source and receptor

population:

1)

Equation S17 is used to calculate the remediation objective assuming an

infinite source of contamination.

A)

The numerical quantities for four parameters in Equation S17, the

Target Soil Leachate Concentration (C

w

), Soil-Water Partition

Coefficient (K

d

) for non-ionizing organics, Water-Filled Soil

Porosity Theta

w

(θ

w

) and Air-Filled Soil Porosity Theta

a

(θ

a

), are

calculated using Equations S18, S19, S20 and S21, respectively.

Equations S22, S23, S24 and S25 are also needed to calculate

numerical values for Equations S18 and S21. The pH-dependent

K

d

values for ionizing organics can be calculated using Equation

S19 and the pH-dependent K

oc

values in Appendix C, Table I.

B)

The remaining parameters in Equation S17 are Henry's Law

Constant (H'), a chemical specific value listed in Appendix C,

Table E and Dry Soil Bulk Density (ρ

b

), a site-specific based value

listed in Appendix C, Table B.

C)

The default value for GW

obj

is the Tier 1 groundwater objective.

For chemicals for which there is no Tier 1 groundwater

remediation objective, the value for GW

obj

shall be the

concentration determined according to the procedures specified in

35 Ill. Adm. Code 620, Subpart F. As an alternative to using Tier

1 groundwater remediation objectives or concentrations

determined according to the procedures specified in 35 Ill. Adm.

Code 620, Subpart F. GW

obj

may be developed using Equations

R25 and R26, if approved institutional controls are in place as

required in Subpart J.

---

2)

If the area and depth of the contaminant source are known or can be

estimated reliably, mass limit considerations may be used to calculate the

remediation objective for this exposure route using Equation S28. The

parameters in Equation S28 have default values listed in Appendix C,

Table B.

(Source: Amended at 25 Ill. Reg. 10374, effective August 15, 2001)

Section 742.715

RBCA Soil Equations

a)

This Section presents the RBCA model and describes the equations and

parameters used to develop Tier 2 soil remediation objectives.

b)

Ingestion, Inhalation, and Dermal Contact

1)

The two sets of equations in subsections (b)(2) and (b)(3) of this Section

shall be used to generate Tier 2 soil remediation objectives for the

combined ingestion, inhalation, and dermal contact with soil exposure

routes.

2)

Combined Exposure Routes of Soil Ingestion, Inhalation of Vapors and

Particulates, and Dermal Contact with Soil

A)

Equations R1 and R2 form the basis for deriving Tier 2

remediation objectives for the set of equations that evaluates the

combined exposure routes of soil ingestion, inhalation of vapors

and particulates, and dermal contact with soil using the RBCA

approach. Equation R1 is used to calculate soil remediation

objectives for carcinogenic contaminants. Equation R2 is used to

calculate soil remediation objectives for noncarcinogenic

contaminants. Soil remediation objectives for the ambient vapor

inhalation (outdoor) route from subsurface soils must also be

calculated in accordance with the procedures outlined in subsection

(b)(3) of this Section and compared to the values generated from

Equations R1 or R2. The smaller value (i.e., R1 and R2 compared

to R7 and R8, respectively) from these calculations is the Tier 2

soil remediation objective for the combined exposure routes of soil

ingestion, inhalation, and dermal contact with soil.

B)

In Equation R1, numerical values are calculated for two

parameters:

i)

The volatilization factor for surficial soils (VF

ss

) using

Equations R3 and R4; and

ii)

The volatilization factor for subsurface soils regarding

particulates (VF

p

) using Equation R5.

---

C)

VF

ss

uses Equations R3 and R4 to derive a numerical value.

Equation R3 requires the use of Equation R6. Both equations must

be used to calculate the VF

ss

. The lowest calculated value from

these equations must be substituted into Equation R1.

D)

The remaining parameters in Equation R1 have either default

values listed in Appendix C, Table D or toxicological-specific

information (i.e., SF

o

, SF

i

), which can be obtained from IRIS or

requested from the program under which the remediation is being

performed.

E)

For Equation R2, the parameters VF

ss

and VF

p

are calculated. The

remaining parameters in Equation R2 have either default values

listed in Appendix C, Table D or toxicological-specific

information (i.e., RfD

o

, RfD

i

), which can be obtained from IRIS or

requested from the program under which the remediation is being

performed.

F)

For chemicals other than inorganics which do not have default

values for the dermal absorption factor (RAF

d

) in Appendix C,

Table D, a dermal absorption factor of 0.5 shall be used for

Equations R1 and R2. For inorganics, dermal absorption may be

disregarded (i.e., RAF

d

= 0).

3)

Ambient Vapor Inhalation (outdoor) route from Subsurface Soils (soil

below one meter)

A)

Equations R7 and R8 form the basis for deriving Tier 2

remediation objectives for the ambient vapor inhalation (outdoor)

route from subsurface soils using the RBCA approach. Equation

R7 is used to calculate soil remediation objectives for carcinogenic

contaminants. Equation R8 is used to calculate soil remediation

objectives for noncarcinogenic contaminants.

B)

For Equation R7, the carcinogenic risk-based screening level for

air (RBSL

air

) and the volatilization factor for soils below one meter

to ambient air (VF

samb

) have numerical values that are calculated

using Equations R9 and R11, respectively. Both equations rely on

input parameters from a variety of sources.

C)

The noncarcinogenic risk-based screening level for air (RBSL

air

)

and the volatilization factor for soils below one meter to ambient

air (VF

samb

) in Equation R8 have numerical values that can be

calculated using Equations R10 and R11, respectively.

c)

Soil Component of the Groundwater Ingestion Exposure Route

---

1)

Equation R12 forms the basis for deriving Tier 2 remediation objectives

for the soil component of the groundwater ingestion exposure route using

the RBCA approach. The parameters, groundwater at the source

(GW

source

) and Leaching Factor (LF

sw

), have numerical values that are

calculated using Equations R13 and R14, respectively.

2)

Equation R13 requires numerical values that are calculated using Equation

R15.

3)

Equation R14 requires numerical values that are calculated using

Equations R21, R22, and R24. For non-ionizing organics, the Soil Water

Sorption Coefficient k

s

shall be calculated using Equation R20. For

ionizing organics and inorganics, the values for (k

s

) are listed in Appendix

C, Tables I and J, respectively. The pH-dependent k

s

values for ionizing

organics can be calculated using Equation R20 and the pH-dependent K

oc

values in Appendix C, Table I. The remaining parameters in Equation

R14 are field measurements or default values listed in Appendix C, Table

D.

d)

The default value for GW

comp

is the Tier 1 groundwater remediation objective.

For chemicals for which there is no Tier 1 groundwater remediation objective, the

value for GW

comp

shall be the concentration determined according to the

procedures specified in 35 Ill. Adm. Code 620, Subpart F. As an alternative to

using the above concentrations, GW

comp

may be developed using Equations R25

and R26, if approved institutional controls are in place as may be required in

Subpart J.

(Source: Amended at 25 Ill. Reg. 10374, effective August 15, 2001)

Section 742.720

Chemicals with Cumulative Noncarcinogenic Effects

Appendix A, Table E lists the groups of chemicals from Appendix B, Tables A and B that have

remediation objectives based on noncarcinogenic toxicity and that affect the same target organ.

If more than one chemical detected at a site affects the same target organ (i.e., has the same

critical effect as defined by the RfD), the initially calculated remediation value for each chemical

in the group shall be corrected for cumulative effects by one of the following two methods:

a)

Calculate the weighted average using the following equations:

W

ave =

x

CUO

x

CUO

x

CUO

x

x

x

CUO

x

a

x

a

12

3

12

3

++

+K +

where:

W

ave

= Weighted Average

---

x

1

through x

a

=

Concentration of each individual contaminant at

the location of concern. Note that, depending on

the target organ/mode of action, the actual number

of contaminants will range from 2 to 14.

CUOx

a

=

A Tier 2 remediation

objective must be developed

for each x

a

.

If the value of the weighted average calculated in accordance with the

equations above is less than or equal to 1.0, then the remediation

objectives are met for those chemicals.

If the value of the weighted average calculated in accordance with the

equations above is greater than 1.0, then additional remediation must be

carried out until the level of contaminants remaining in the remediated

area has a weighted average calculated in accordance with the equation

above less than or equal to one.

b)

Divide each individual chemical's remediation objective by the number of

chemicals in that specific target organ group that were detected at the site. Each

of the contaminant concentrations at the site is then compared to the remediation

objectives that have been adjusted to account for this potential additivity. For the

noncarcinogenic contaminants listed in Appendix A, Table E, a respective soil

remediation objective need be no lower than the respective value listed in

Appendix B, Table A or B.

SUBPART H: TIER 2 GROUNDWATER EVALUATION

Section 742.800

Tier 2 Groundwater Evaluation Overview

If the contaminant concentrations in the groundwater exceed the applicable Tier 1 remediation

objectives, a person has the following options:

a)

Demonstrate that the groundwater ingestion exposure route is excluded from

consideration pursuant to Subpart C;

b)

Demonstrate that the groundwater contamination is at or below area background

concentrations in accordance with Subpart D and, if necessary, an institutional

control restricting usage of the groundwater is in place in accordance with Subpart

J;

c)

Remediate to Tier 1 remediation objectives;

---

d)

Propose and obtain approval of Tier 2 groundwater remediation objectives in

accordance with Section 742.805 and remediate to that level, if necessary;

e)

Conduct a Tier 3 evaluation in accordance with Subpart I; or

f)

Obtain approval from the Board to:

1)

Reclassify the groundwater pursuant to 35 Ill. Adm. Code 620.260; or

2)

Use an adjusted standard pursuant to Section 28.1 of the Act. [415 ILCS

5/28.1].

Section 742.805

Tier 2 Groundwater Remediation Objectives

a)

To develop a groundwater remediation objective under this Section that exceeds

the applicable Tier 1 groundwater remediation objective, or for which there is no

Tier I groundwater remediation objective, a person may request approval from the

Agency if the person has performed the following:

1)

Identified the horizontal and vertical extent of groundwater for which the

Tier 2 groundwater remediation objective is sought;

2)

Taken corrective action, to the maximum extent practicable to remove

any free product;

3)

Using Equation R26 in accordance with Section 742.810, demonstrated

that the concentration of any contaminant of concern in groundwater will

meet:

A)

The applicable Tier 1 groundwater remediation objective at the

point of human exposure; or

B)

For any contaminant of concern for which there is no Tier 1

groundwater remediation objective, the concentration determined

according to the procedures specified in 35 Ill. Adm. Code 620 at

the point of human exposure. A person may request the Agency to

provide these concentrations or may propose these concentrations

under Subpart I;

4)

Using Equation R26 in accordance with Section 742.810, demonstrated

that the concentration of any contaminant of concern in groundwater

within the minimum or designated maximum setback zone of an existing

potable water supply well will meet the applicable Tier 1 groundwater

remediation objective or, if there is no Tier 1 groundwater remediation

objective, the concentration determined according to the procedures

specified in 35 Ill. Adm. Code 620. A person may request the Agency to

---

provide these concentrations or may propose these concentrations under

Subpart I;

5)

Using Equation R26 in accordance with Section 742.810, demonstrated

that the concentration of any contaminant of concern in groundwater

discharging into a surface water will meet the applicable water quality

standard under 35 Ill. Adm. Code 302;

6)

Demonstrated that the source of the release is not located within the

minimum or designated maximum setback zone or within a regulated

recharge area of an existing potable water supply well; and

7)

If the selected corrective action includes an engineered barrier as set forth

in Subpart K to minimize migration of contaminant of concern from the

soil to the groundwater, demonstrated that the engineered barrier will

remain in place for post-remediation land use through an institutional

control as set forth in Subpart J.

b)

A groundwater remediation objective that exceeds the water solubility of that

chemical (refer to Appendix C, Table E for solubility values) is not allowed.

c)

The contaminants of concern for which a Tier 1 remediation objective has been

developed shall be included in any mixture of similar-acting chemicals under

consideration in Tier 2. The evaluation of 35 Ill. Adm. Code 620.615 regarding

mixtures of similar-acting chemicals shall be considered satisfied for Class I

groundwater at the point of human exposure if either of the following

requirements are achieved:

1)

Calculate the weighted average using the following equations:

CUOxa

a

ave

CUOx

CUOx

CUOx

W

=

x

+

x

+

x

+...+

x

23

2

1

1

3

where:

W

ave

= Weighted Average

x

1

through x

a

= Concentration of each individual contaminant at

the location of concern. Note that, depending on

the target organ, the actual number of

contaminants will range from 2 to 33.

CUOx

a

=

A Tier 1 or Tier 2 remediation objective must be

developed for each x

a

.

A)

If the value of the weighted average calculated in accordance with

the equations above is less than or equal to 1.0, then the

remediation objectives are met for those chemicals.

---

B)

If the value of the weighted average calculated in accordance with

the equations above is greater than 1.0, then additional remediation

must be carried out until the level of contaminants remaining in the

remediated area has a weighted average calculated in accordance

with the equation above less than or equal to one; or

2)

Divide each individual chemical's remediation objective by the number of

chemicals in that specific target organ group that were detected at the site.

Each of the contaminant concentrations at the site is then compared to the

remediation objectives that have been adjusted to account for this potential

additivity.

d)

The evaluation of 35 Ill. Adm. Code 620.615 regarding mixtures of similar-acting

chemicals are considered satisfied if the cumulative risk from any contaminant(s)

of concern listed in Appendix A, Table I, plus any other contaminant(s) of

concern detected in groundwater and listed in Appendix A, Table F as affecting

the same target organ/organ system as the contaminant(s) of concern detected

from Appendix A, Table I, does not exceed 1 in 10,000.

(Source: Amended at 31 Ill. Reg. 4063, effective February 23, 2007)

Section 742.810

Calculations to Predict Impacts from Remaining Groundwater

Contamination

a)

Equation R26 predicts the contaminant concentration along the centerline of a

groundwater 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 groundwater 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)

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 groundwater source in the y direction

S

d

=

depth of planar groundwater 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 C

x

along the centerline of the

plume at a distance X from the source shall be calculated so that X is the 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 concentration determined according to the procedures

specified in 35 Ill. Adm. Code 620, Subpart F.

1)

If there are any potable water supply wells located within the calculated

distance X, then the Tier 1 groundwater remediation objective or

concentration shall be met at the edge of the minimum or designated

maximum setback zone of the nearest potable water supply down-gradient

of the source. To demonstrate that a minimum or maximum setback zone

---

of a potable water supply well will not be impacted above the applicable

Tier 1 groundwater remediation objective or concentration determined

according to the procedures specified in 35 Ill. Adm. Code 620, Subpart F,

X shall be the distance from the C

source

location to the edge of the setback

zone.

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

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 25 Ill. Reg. 10374, effective August 15, 2001)

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);

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., a site will be used for

recreation in the future and cannot be evaluated in Tier 1 or 2); and

9)

Requests for site-specific remediation objectives that 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

. [415 ILCS 5/58.5(d)(4)(A)]

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

. [415 ILCS 58.7(e)(1)]. 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.

f)

If contaminants of concern include polychlorinated biphenyls (PCBs), requests for

approval of a Tier 3 evaluation must additionally address the applicability of 40

CFR 761.

(Source: Amended at 31 Ill. Reg. 4063, effective February 23, 2007)

Section 742.905

Modifications of Parameters

Any proposed changes to Tier 2 parameters which are not provided for in Tier 2 shall be

submitted to the Agency for review and approval. A submittal under this Section shall include

the following information:

---

a)

The justification for the modification; and

b)

The technical and mathematical basis for the modification.

Section 742.910

Alternative Models

Any proposals for the use of models other than those specified in Tier 2 shall be submitted to the

Agency for review and approval. A submittal under this Section shall include the following

information:

a)

Physical and chemical properties of contaminants of concern;

b)

Contaminant movement properties;

c)

Contaminant availability to receptors;

d)

Receptor exposure to the contaminants of concern;

e)

Mathematical and technical justification for the model proposed;

f)

A licensed copy of the model, if the Agency does not have a licensed copy of the

model currently available for use; and

g)

Demonstration that the models were correctly applied.

Section 742.915

Formal Risk Assessments

A comprehensive site-specific risk assessment shall demonstrate that contaminants of concern at

a site do not pose a significant risk to any human receptor. All site-specific risk assessments

shall be submitted to the Agency for review and approval. A submittal under this Section shall

address the following factors:

a)

Whether the risk assessment procedure used is nationally recognized and accepted

including, but not limited to, those procedures incorporated by reference in

Section 742.210;

b)

Whether the site-specific data reflect actual site conditions;

c)

The adequacy of the investigation of present and post-remediation exposure

routes and risks to receptors identified at the site;

d)

The appropriateness of the sampling and analysis;

e)

The adequacy and appropriateness of toxicity information;

---

f)

The extent of contamination;

g)

Whether the calculations were accurately performed;

h)

Similar-acting chemicals shall be specifically addressed. At a minimum, the

chemicals subject to this requirement are identified in Appendix A, Tables E and

F; and

i)

Proposals seeking to modify the target risk consistent with Section 742.900(d)

shall address the following factors:

1)

the presence of sensitive populations;

2)

the number of receptors potentially impacted;

3)

the duration of risk at the differing target levels; and

4)

the characteristic of the chemicals of concern.

SOURCE: Amended at 21 Ill. Reg. 16391, effective December 8, 1997.

Section 742.920

Impractical Remediation

Any request for site-specific remediation objectives due to impracticality of remediation shall be

submitted to the Agency for review and approval. A submittal under this Section shall include

the following information:

a)

The reason(s) why the remediation is impractical;

b)

The extent of contamination;

c)

Geology, including soil types;

d)

The potential impact to groundwater;

e)

Results and locations of sampling events;

f)

Map of the area, including all utilities and structures; and

g)

Present and post-remediation uses of the area of contamination, including human

receptors at risk.

Section 742.925

Exposure Routes

---

Technical information may demonstrate that there is no actual or potential impact of

contaminants of concern to receptors from a particular exposure route. In these instances, a

demonstration excluding an exposure route shall be submitted to the Agency for review and

approval. A submittal under this Section shall include the following information:

a)

A description of the route evaluated;

b)

A description of the site and physical site characteristics;

c)

A discussion of the result and possibility of the route becoming active in the

future; and

d)

Technical support that may include, but is not limited to, the following:

1)

a discussion of the natural or man-made barriers to that exposure route;

2)

calculations and modeling;

3)

physical and chemical properties of contaminants of concern; and

4)

contaminant migration properties.

(Source: Amended at 25 Ill. Reg. 10374, effective August 15, 2001)

Section 742.930

Derivation of Toxicological Data

If toxicological-specific information is not available for one or more contaminants of concern

from the sources incorporated by reference in Section 742.210, the derivations of toxicological-

specific information shall be submitted for Agency review and approval.

SUBPART J: INSTITUTIONAL CONTROLS

Section 742.1000

Institutional Controls

a)

Institutional controls in accordance with this Subpart must be placed on the

property when remediation objectives are based on any of the following

assumptions:

1)

Industrial/Commercial property use;

2)

Target cancer risk greater than 1 in 1,000,000;

3)

Target hazard quotient greater than 1;

4)

Engineered barriers;

---

5)

The point of human exposure is located at a place other than at the source;

6)

Exclusion of exposure routes; or

7)

Any combination of the above.

b)

The Agency shall not approve any remediation objective under this Part that is

based on the use of institutional controls unless the person has proposed

institutional controls meeting the requirements of this Subpart and the

requirements of the specific program under which the institutional control is

proposed. A proposal for approval of institutional controls shall provide

identification of the selected institutional controls from among the types

recognized in this Subpart.

c)

The following instruments may be institutional controls subject to the

requirements of this Subpart J and the requirements of the specific program under

which the institutional control is proposed:

1)

No Further Remediation Letters;

2)

Environmental Land Use Controls;

3)

Land Use Control Memoranda of Agreement;

4)

Ordinances adopted and administered by a unit of local government;

5)

Agreements between a property owner (or, in the case of a petroleum

leaking underground storage tank, the owner or operator of the tank) and a

highway authority with respect to any contamination remaining under

highways; and

6)

Agreements between a highway authority that is also the property owner

(or, in the case of a petroleum leaking underground storage tank, the

owner or operator of the tank) and the Agency with respect to any

contamination remaining under the highways.

d)

No Further Remediation Letters and Environmental Land Use Controls that meet

the requirements of this Subpart and the recording requirements of the program

under which remediation is being performed are transferred with the property.

(Source: Amended at 31 Ill. Reg. 4063, effective February 23, 2007)

Section 742.1005

No Further Remediation Letters

a)

A No Further Remediation Letter issued by the Agency under 35 Ill. Adm. Code

732 or 740 may be used as an institutional control under this Part if the

requirements of subsection (b) of this Section are met.

---

b)

A request for approval of a No Further Remediation Letter as an institutional

control shall meet the requirements applicable to the specific program under

which the remediation is performed.

(Source: Amended at 25 Ill. Reg. 10374, effective August 15, 2001)

Section 742.1010

Environmental Land Use Controls

a)

An Environmental Land Use Control (ELUC) is an institutional control that may

be used under this Part to impose land use limitations or requirements related to

environmental contamination. ELUCs are only effective when approved by the

Agency in accordance with this Part. Activities or uses that may be limited or

required include, but are not limited to, prohibition of use of groundwater for

potable purposes, restriction to industrial/commercial uses, operation or

maintenance of engineered barriers, or worker safety plans. ELUCs may be used

in the following circumstances:

1)

When No Further Remediation Letters are not available, including but not

limited to when contamination has migrated off-site or outside the

remediation site; or

2)

When No Further Remediation Letters are not issued under the program

for which a person is undergoing remediation.

b)

Recording requirements:

1)

An ELUC approved by the Agency pursuant to this Section must be

recorded in the Office of the Recorder or Registrar of Titles for the county

in which the property that is the subject of the ELUC is located. A copy

of the ELUC demonstrating that it has been recorded must be submitted to

the Agency before the Agency will issue a no further remediation

determination.

2)

An ELUC approved under this Section will not become effective until

officially recorded in the chain of title for the property that is the subject

of the ELUC in accordance with subsection (b)(1) of this Section.

3)

Reference to the recorded ELUC must be made in the instrument

memorializing the Agency’s no further remediation determination.

Recording of the no further remediation determination and confirmation of

recording must be in accordance with the requirements of the program

under which the determination was issued.

4)

The requirements of this Section do not apply to Federally Owned

Property for which the Federal Landholding Entity does not have the

authority under federal law to record land use limitations on the chain of

title.

---

5)

The requirements of this Section apply only to those sites for which a

request for a no further remediation determination has not yet been made

to the Agency by January 6, 2001.

c)

Duration:

1)

Except as provided in this subsection (c), an ELUC shall remain in effect

in perpetuity.

2)

At no time shall any site for which an ELUC has been imposed as a result

of remediation activities under

this Part

be used in a manner inconsistent

with the land use limitation unless attainment of objectives appropriate for

the new land use

is achieved

and a new

no further remediation

determination has been

obtained and recorded in accordance with

the

program under which the ELUC was first imposed or the Site Remediation

Program (35 Ill. Adm. Code 740). [415 ILCS 58.8(c)]. In addition, the

appropriate release or modification of the ELUC must be prepared by the

Agency and filed on the chain of title for the property that is the subject of

the ELUC.

A)

For a Leaking Underground Storage Tank (LUST) site under 35

Ill. Adm. Code 731 or 732 or a Site Remediation Program site

under 35 Ill. Adm. Code 740, an ELUC may be released or

modified only if the NFR Letter is also modified under the Site

Remediation Program to reflect the change;

B)

For a RCRA site under 35 Ill. Adm. Code 721-730, an ELUC may

be released or modified only if there is also an amended

certification of closure or a permit modification.

3)

In addition to any other remedies that may be available, a failure to

comply with the limitations or requirements of an ELUC may result in

voidance of an Agency no further remediation determination in

accordance with the program under which the determination was made.

The failure to comply with the limitations or requirements of an ELUC

may also be grounds for an enforcement action pursuant to Title VIII of

the Act.

d)

An ELUC submitted to the Agency must match the form and contain the same

substance, except for variable elements (e.g., name of property owner), as the

model in Appendix F and must contain the following elements:

1)

Name of property owners and declaration of property ownership;

2)

Identification of the property to which the ELUC applies by common

address, legal description, and Real Estate Tax Index/Parcel Index

Number;

---

3)

A reference to the Bureau of Land LPC numbers or 10-digit identification

numbers under which the remediation was conducted;

4)

A statement of the reason for the land use limitation or requirement

relative to protecting human health and the surrounding environment from

soil, groundwater, and/or other environmental contamination;

5)

The language instituting such land use limitations or requirements;

6)

A statement that the limitations or requirements apply to the current

owners, occupants, and all heirs, successors, assigns, and lessees;

7)

A statement that the limitations or requirements apply in perpetuity or

until:

A)

The Agency determines that there is no longer a need for the

ELUC;

B)

The Agency, upon written request, issues to the site that received

the no further remediation determination that relies on the ELUC a

new no further remediation determination approving modification

or removal of the limitations or requirements;

C)

The new no further remediation determination is filed on the chain

of title of the site subject to the no further remediation

determination; and

D)

A release or modification of the land use limitation is filed on the

chain of title for the property that is the subject of the ELUC;

8)

Scaled site maps showing:

A)

The legal boundary of the property to which the ELUC applies;

B)

The horizontal and vertical extent of contaminants of concern

above applicable remediation objectives for soil and groundwater

to which the ELUC applies;

C)

Any physical features to which an ELUC applies (e.g., engineered

barriers, monitoring wells, caps); and

D)

The nature, location of the source, and direction of movement of

the contaminants of concern;

9)

A statement that any information regarding the remediation performed on

the property for which the ELUC is necessary may be obtained from the

Agency through a request under the Freedom of Information Act [5 ILCS

140] and rules promulgated thereunder; and

---

10)

The dated, notarized signatures of the property owners or authorized

agent.

(Source: Amended at 31 Ill. Reg. 4063, effective February 23, 2007)

Section 742.1012

Federally Owned Property: Land Use Control Memoranda of Agreement

a)

A Land Use Control Memorandum of Agreement (LUC MOA) between one or

more agencies of the federal government and the Illinois Environmental

Protection Agency is the institutional control that shall be used under this Part to

impose land use limitations or restrictions related to environmental contamination

on Federally Owned Property. A LUC MOA may be used only for Federally

Owned Property. Each LUC MOA, at a minimum, must require that the Federal

Landholding Entities responsible for the Federally Owned Property do the

following:

1)

Provide adequate identification of the location on the Federally

Owned Property of each site with land use limitations or

requirements. Such identification shall be by means of common

address, notations in any available facility master land use plan,

site specific GIS or GPS coordinates, plat maps, or any other

means which identifies the site in question with particularity;

2)

Implement periodic site inspection procedures to ensure adequate

oversight by the Federal Landholding Entities of such land use

limitation or requirement;

3)

Implement procedures for the Federal Landholding Entities to

periodically advise the Agency of continued compliance with the

maintenance of the land use control and site inspection

requirements included in the LUC MOA;

4)

Implement procedures for the Federal Landholding Entities to

notify the Agency of any planned or emergency changes in land

use that may adversely impact any site with land use limitations or

requirements; and

5)

Notify the Agency at least 60 days in advance of a conveyance by

deed or fee simple title, by the Federal Landholding Entities, of a

site with land use limitations or requirements, to any entity that

will not remain or become a Federal Landholding Entity, and

provide the Agency with information about how the Federal

Landholding Entities will ensure that the requirements of Section

742.1010 are to be satisfied upon conveyance of that site.

---

a)

Any LUC MOA entered into pursuant to this Section remains effective only so

long as title to the affected property is retained by the United States.

(Source: Amended at 31 Ill. Reg. 4063, effective February 23, 2007)

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. A model ordinance is found

in Appendix G. 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. For purposes of this Section, a unit of local government is considered to be

expressly prohibited from installing and using potable water supply wells only if the

unit of local government is included in the prohibition provision by name. The

prohibition required by this Section shall satisfy the following requirements at a

minimum:

1)

The prohibition shall not allow exceptions for potable water well

installation and use other than for the adopting unit of local government;

2)

The prohibition shall apply at all depths and shall not be limited to

particular aquifers or other geologic formations;

3)

If the prohibition does not apply everywhere within the boundaries of the

unit of local government, the limited area to which the prohibition applies

shall be easily identifiable and clearly defined by the ordinance (e.g.,

narrative descriptions accompanied by maps with legends or labels

showing prohibition boundaries or narrative descriptions using fixed,

common reference points such as street names). Boundaries of

prohibitions limited by area shall be fixed by the terms of the ordinance

and shall not be subject to change without amending the ordinance in

which the prohibition has been adopted (e.g., no boundaries defined with

reference to zoning districts or the availability of the public water supply);

and

4)

The prohibition shall not in any way restrict or limit the Agency’s

approval of the use of the ordinance as an institutional control pursuant to

this Part (e.g., no restrictions based on remediation program participation

or no restrictions on persons performing remediation within the

prohibition area who may use the ordinance).

---

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

a true and accurate 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 area and extent of groundwater

contamination modeled above the applicable remediation objectives

including any measured data showing concentrations of contaminants of

concern in which the applicable remediation objectives are exceeded;

3)

A scaled map delineating the boundaries of all properties under which

groundwater is located which exceeds the applicable groundwater

remediation objectives;

4)

Information identifying the current owner(s) of each property identified in

subsection (b)(3) of this Section; and

5)

A copy of the proposed written notification to the unit of local government

that adopted the ordinance and to the current owners identified in

subsection (b)(4) of this Section that includes the following information:

A)

The name and address of the unit of local government that adopted

the ordinance;

B)

The ordinance’s citation;

C)

A description of the property being sent notice by adequate legal

description, reference to a plat showing the boundaries of the

property, or accurate street address;

D)

Identification of the party requesting to use the groundwater

ordinance as an institutional control, and a statement that the party

has requested approval from the Agency to use the ordinance as an

institutional control;

E)

A statement that use of the ordinance as an institutional control

allows contamination above groundwater ingestion remediation

objectives to remain in groundwater beneath the affected

properties, and that the ordinance strictly prohibits human and

domestic consumption of the groundwater;

---

F)

A statement as to the nature of the release and response action with

the site name, site address, and Agency site number or Illinois

inventory identification number; and

G)

A statement that more information about the remediation site may

be obtained by contacting the party requesting the use of the

groundwater ordinance as an institutional control or by submitting

a FOIA request to the Agency.

c)

Written notification proposed pursuant to subsection (b)(5) of this Section must

be sent to the unit of local government that adopted the ordinance, as well as to all

current property owners identified in subsection (b)(4). Written proof that the

notification was sent to the unit of local government and the property owners shall

be submitted to the Agency within 45 days from the date the Agency’s no further

remediation determination is recorded. Such proof may consist of the return card

from certified mail, return receipt requested, a notarized certificate of service, or a

notarized affidavit.

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)(3) 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)(5) 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 determination.

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)(3) of this Section;

3)

Violation of the terms of an institutional control recorded under Section

742.1005 or Section 742.1010; or

4)

Failure to provide notification and proof of such notification pursuant to

subsection (c) of this Section.

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 submitted to the Agency must match the form and contain the same

substance as the model in Appendix H and 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:

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 31 Ill. Reg. 4063, effective February 23, 2007)

Section 742.1020

Highway Authority Agreements and Highway Authority Agreement

Memoranda of Agreement

a)

An agreement with a highway authority may be used as an institutional control

where the requirements of this Section are met and the Agency has determined

that no further remediation is required as to the property(ies) to which the

agreement is to apply. Highway Authority Agreements submitted to the Agency,

except for those agreements with the Illinois Department of Transportation, must

match the form and contain the same substance, except for variable elements, as

the model in Appendix D.

b)

As part of the agreement the highway authority shall agree to:

1)

Prohibit the use of groundwater under the highway right of way that is

contaminated above residential Tier 1 remediation objectives from the

release as a potable supply of water; and

2)

Limit access to soil contamination under the highway right of way that is

contaminated above residential Tier 1 or construction worker remediation

objectives, whichever is less, from the release. Access to soil

contamination may be allowed if, during and after any access, public

health and the environment are protected.

c)

The agreement shall provide the following:

1)

Fully executed signature blocks by the highway authority and the owner of

the property (or, in the case of a petroleum leaking underground storage

tank, the owner or operator of the tank) from which the release occurred;

2)

A scaled map delineating the area and extent of soil and groundwater

contamination above the applicable Tier 1 remediation objectives or a

statement that either soil or groundwater is not contaminated above the

applicable Tier 1 residential remediation objectives;

---

3)

Information showing the concentration of contaminants of concern within

the zone in which the applicable Tier 1 remediation objectives are

exceeded;

4)

A stipulation of the information required by subsections (c)(2) and (3) of

this Section in the agreement if it is not practical to obtain the information

by sampling the highway right-of-way; and

5)

Information identifying the highway authority having jurisdiction.

d)

Highway Authority Agreements must be referenced in the instrument that is to be

recorded on the chain of title for the remediation property.

e) Violation of the terms of an Agreement approved by the Agency as an institutional

control under this Section shall be grounds for voidance of the Agreement as an

institutional control and the instrument memorializing the Agency's no further

remediation determination.

f)

Failure to provide all of the information required in subsections (b) and (c) of this

Section will be grounds for denial of the Highway Authority Agreement as an

institutional control.

g)

In instances in which the highway authority is also the property owner of the site,

a Highway Authority Agreement may not be used. In such cases, the highway

authority shall instead enter into a Highway Authority Agreement Memorandum

of Agreement (HAA MOA) between the highway authority and the Agency. An

HAA MOA may be used as an institutional control where the requirements of this

Section are met and the Agency has determined that no further remediation is

required as to the property(ies) to which the agreement is to apply. HAA MOAs

submitted to the Agency must match the form and contain the same substance,

except for variable elements, as the model in Appendix E.

h)

As part of the HAA MOA the highway authority shall agree to:

1)

Prohibit the use of groundwater under the highway right of way that is

contaminated above residential Tier 1 or construction worker remediation

objectives, whichever are less, from the release as a potable supply of

water; and

2)

Limit access to soil contamination under the highway right of way that is

contaminated above residential Tier 1 or construction worker remediation

objectives, whichever are less, from the release. Access to soil

contamination may be allowed if, during and after any access, public

health and the environment are protected.

i)

The HAA MOA shall provide the following:

---

1)

Information identifying the site by common address or legal description or

both;

2)

The Illinois Emergency Management Agency’s (IEMA) incident number

for the site, if one has been assigned;

3)

A scaled map delineating the current and estimated future area and extent

of soil and groundwater contamination above the applicable Tier 1 or

construction worker remediation objectives, whichever are less, or a

statement that either soil or groundwater is not contaminated above the

applicable Tier 1 residential remediation objectives;

4)

Information prepared by the highway authority that lists each contaminant

of concern that exceeds its Tier 1 residential or construction worker

remediation objective, its Tier 1 residential remediation objective, and its

concentrations within the zone where Tier 1 residential or construction

worker remediation objectives, whichever is less, are exceeded;

5)

A scaled map prepared by the highway authority showing the area of the

highway authority’s right of way that is governed by the HAA MOA;

6)

If samples have not been collected within the right of way because of

impracticability, a stipulation by the parties that, based on modeling, soil

and groundwater contamination exceeding Tier 1 residential or

construction worker remediation objectives, whichever is less, does not

and will not extend beyond the boundaries of the right-of-way;

7)

A stipulation by the highway authority that it has jurisdiction over the

right of way that gives it sole control over the use of the groundwater and

access to the soil located within or beneath the right of way;

8)

A stipulation by the highway authority that it agrees to limit access by

itself and others to soil within the right of way exceeding Tier 1 residential

or construction worker remediation objectives, whichever is less. Access

may only be allowed if human health (including worker safety) and the

environment are protected during and after any access. The highway

authority may construct, reconstruct, improve, repair, maintain, and

operate a highway upon the right of way, or allow others to do the same by

permit. The highway authority and others using or working in the right of

way under permit have the right to remove soil or groundwater from the

right of way and dispose of the same in accordance with applicable

environmental laws and regulations. The highway authority agrees to

issue all permits for work in the right of way, and make all existing

permits for work in the right of way, subject to the following or

substantially similar conditions:

A)

As a condition of this permit the permittee shall request the office

issuing this permit to identify sites in the right of way where a

---

HAA MOA governs access to soil that exceeds the Tier 1

residential remediation objectives of 35 Ill. Adm. Code 742; and

B)

The permittee shall take all measures necessary to protect human

health (including worker safety) and the environment during and

after any access to such soil;

9)

A stipulation that the HAA MOA shall be referenced in the Agency’s no

further remediation determination issued for the release(s);

10)

A stipulation that the highway authority shall notify the Agency of any

transfer of jurisdiction over the right of way at least 30 days prior to the

date the transfer takes effect. The HAA MOA shall be null and void upon

the transfer unless the transferee agrees to be bound by the agreement as if

the transferee were an original party to the agreement. The transferee’s

agreement to be bound by the terms of the agreement shall be

memorialized at the time of transfer as a rider to this agreement that

references the HAA MOA and is signed by the highway authority, or

subsequent transferor, and the transferee;

11)

A stipulation that the HAA MOA will become effective on the date the

Agency issues a no further remediation determination for the release(s). It

shall remain effective until the right of way is demonstrated to be suitable

for unrestricted use and the Agency issues a new no further remediation

determination to reflect there is no longer a need for the HAA MOA, or

until the agreement is otherwise terminated or voided;

12)

A stipulation that in addition to any other remedies that may be available,

the Agency may bring suit to enforce the terms of the HAA MOA or may,

at its sole discretion, declare the HAA MOA null and void if the highway

authority or a transferee violates any term of the HAA MOA. The

highway authority or transferee shall be notified in writing of any such

declaration; and

13)

A fully executed signature block by the highway authority and a block for

the Agency’s Director.

(Source: Amended at 31 Ill. Reg. 4063, effective February 23, 2007)

SUBPART K: ENGINEERED BARRIERS

Section 742.1100 Engineered Barriers

a)

Any person who develops remediation objectives under this Part based on

engineered barriers shall meet the requirements of this Subpart and the

requirements of Subpart J relative to institutional controls.

---

b)

The Agency shall not approve any remediation objective under this Part that is

based on the use of engineered barriers unless the person has proposed engineered

barriers meeting the requirements of this Subpart.

c)

The use of engineered barriers can be recognized in calculating remediation

objectives only if the engineered barriers are intended for use as part of the final

corrective action.

d)

Any no further remediation determination based upon the use of engineered

barriers shall require effective maintenance of the engineered barrier. The

maintenance requirements shall be included in an institutional control under

Subpart J. This institutional control shall address provisions for temporary

breaches of the barrier by requiring the following if intrusive construction work is

to be performed in which the engineered barrier is to be temporarily breached:

1)

The construction workers shall be notified by the site owner/operator in

advance of intrusive activities. Such notification shall enumerate the

contaminant of concern known to be present; and

2)

The site owner/operator shall require construction workers to implement

protective measures consistent with good industrial hygiene practice.

e)

Failure to maintain an engineered barrier in accordance with that no further

remediation determination shall be grounds for voidance of the determination and

the instrument memorializing the Agency's no further remediation determination.

Section 742.1105

Engineered Barrier Requirements

a)

Natural attenuation, access controls, and point of use treatment shall not be

considered engineered barriers. Engineered barriers may not be used to prevent

direct human exposure to groundwater without the use of institutional controls.

b)

For purposes of determining remediation objectives under Tier 1, engineered

barriers are not recognized.

c)

The following engineered barriers are recognized for purposes of calculating

remediation objectives that exceed residential remediation objectives:

1)

For the soil component of the groundwater ingestion exposure route, the

following engineered barriers are recognized if they prevent completion of

the exposure pathway:

A)

Caps or walls constructed of compacted clay, asphalt, concrete or

other material approved by the Agency; and

B)

Permanent structures such as buildings and highways.

---

2)

For the soil ingestion exposure route, the following engineered barriers are

recognized if they prevent completion of the exposure pathway:

A)

Caps or walls constructed of compacted clay, asphalt, concrete, or

other material approved by the Agency;

B)

Permanent structures such as buildings and highways; and

C)

Soil, sand, gravel, or other geologic materials that:

i)

Cover the contaminated media;

ii)

Meet the soil remediation objectives under Subpart E for

residential property for contaminants of concern; and

iii)

Are a minimum of three feet in depth.

3)

For the inhalation exposure route, the following engineered barriers are

recognized if they prevent completion of the exposure pathway:

A)

Caps or walls constructed of compacted clay, asphalt, concrete, or

other material approved by the Agency;

B)

Permanent structures such as buildings and highways; and

C)

Soil, sand, gravel, or other geologic materials that:

i)

Cover the contaminated media;

ii)

Meet the soil remediation objectives under Subpart E for

residential property for contaminants of concern; and

iii)

Are a minimum of ten feet in depth and not within ten feet

of any manmade pathway.

4)

For the ingestion of groundwater exposure route, the following engineered

barriers are recognized if they prevent completion of the exposure

pathway:

A)

Slurry walls; and

B)

Hydraulic control of groundwater.

d)

Unless otherwise prohibited under Section 742.1100, any other type of engineered

barrier may be proposed if it will be as effective as the options listed in subsection

(c) of this Section.

(Source: Amended at 25 Ill. Reg. 10374, effective August 15, 2001)

---

Section 742.APPENDIX A: General

Section 742.Illustration A: Developing Soil Remediation Objectives Under the Tiered Approach

Use

Tier

look-up tables

1

Develop

Tier

objectives

2

for those

contaminants which

did not meet the Tier

1 objectives.

Develop

Tier

Tier

3

3

objectives based on

methods other than

those allowed in

Tier 1 or Tier 2.

Remediate to

Tier 1 objectives

(Instutional controls

may be required)

No Further

Remediation

Remediate to

Tier 2 objectives

(Institutional controls

may be required)

No Further

Remediation

Do you meet the

Tier 3

objectives?

No Further Remediation

(Institutional controls may be required)

Are the Tier 1

remediation

objectives met?

No Further Remediation

(Institutional controls may be required)

No

Develop Tier 2

remediation

objectives

(May include the use of

instutional controls and

engineered barriers)

No Further Remediation

(Institutional controls may be required)

Yes

Develop Tier 3

remediation

objectives

(May include the use of

instutional controls and

engineered barriers)

No

No

Are the Tier 2

objectives met?

Yes

No

Yes

Yes

Remediate to the

Tier 3 objectives.

No

Site

Characterization

and Exposure

Route Evaluation

No

---

Section 742.APPENDIX A: General

Section 742.Illustration B: Developing Groundwater Remediation Objectives Under the Tiered

Approach

Tier 1

Use look-up tables

For

Tier

contaminants

2

which did not meet

the Tier 1 objectives

For

Tier

contaminants

3

that do not meet the

Tier 1 or Tier 2

remediation

objectives

Remediate to

Tier 1 Levels

(Institutional controls

may be required)

No Further

Remediation

Remediate to the

Tier 2 objective

No Further Remediation

(Institutional controls may be required)

Are the Tier 3

remediation objectives

achieved?

No Further

Remediation

Are the Tier 1

remediation

objectives met?

No Further Remediation

(Institutional controls may be required)

Yes

No

Demonstrate and

calculate onsite and

offsite groundwater

impacts

Develop Tier 3

objectives based on

methods other than

those allowed in Tier

1 or Tier 2

No

No

Are the Tier 2

objectives met?

Yes

No

Develop a Tier 2

groundwater

remediation

objective

Yes

No

Yes

No

Remediate to

objectives

Site

Characterization,

Groundwater

Classification and

Exposure Route

Evaluation

---

Section 742.APPENDIX A: General

Section 742.TABLE A: Soil Saturation Limits (C

sat

)for Chemicals Whose Melting Point is Less

than 30° C

CAS No.

Chemical Name

C

sat

(mg/kg)

67-64-1

Acetone

100,000

71-43-2

Benzene

870

111-44-4

Bis(2-chloroethyl)ether

3,300

117-81-7

Bis(2-ethylhexyl)phthalate

31,000

75-27-4

Bromodichloromethane (Dichlorobromomethane)

3,000

75-25-2

Bromoform

1,900

71-36-3

Butanol

10,000

85-68-7

Butyl benzyl phthalate

930

75-15-0

Carbon disulfide

720

56-23-5

Carbon tetrachloride

1,100

108-90-7

Chlorobenzene (Monochlorobenzene)

680

124-48-1

Chlorodibromomethane (Dibromochloromethane)

1,300

67-66-3

Chloroform

2,900

96-12-8

1,2-Dibromo-3-chloropropane

1,400

106-93-4

1,2-Dibromoethane (Ethylene dibromide)

2,800

84-74-2

Di-

n

-butyl phthalate

2,300

95-50-1

1,2-Dichlorobenzene (o-Dichlorobenzene)

560

75-34-3

1,1-Dichloroethane

1,700

107-06-2

1,2-Dichloroethane (Ethylene dichloride)

1,800

75-35-4

1,1-Dichloroethylene

1,500

156-59-2

cis

-1,2-Dichloroethylene

1,200

156-60-5

trans

-1,2-Dichloroethylene

3,100

78-87-5

1,2-Dichloropropane

1,100

542-75-6

1,3-Dichloropropene (1,3-Dichloropropylene,

cis

+

trans

)

1,400

84-66-2

Diethyl phthalate

2,000

117-84-0

Di-

n

-octyl phthalate

10,000

100-41-4

Ethylbenzene

400

---

77-47-4

Hexachlorocyclopentadiene

2,200

78-59-1

Isophorone

4,600

74-83-9

Methyl bromide (Bromomethane)

3,200

1634-04-4

Methyl tertiary-butyl ether

8,800

75-09-2

Methylene chloride (Dichloromethane)

2,400

98-95-3

Nitrobenzene

1,000

100-42-5

Styrene

1,500

127-18-4

Tetrachloroethylene (Perchloroethylene)

240

108-88-3

Toluene

650

120-82-1

1,2,4-Trichlorobenzene

3,200

71-55-6

1,1,1-Trichloroethane

1,200

79-00-5

1,1,2-Trichloroethane

1,800

79-01-6

Trichloroethylene

1,300

108-05-4

Vinyl acetate

2,700

75-01-4

Vinyl chloride

1,200

108-38-3

m-Xylene

420

95-47-6

o-Xylene

410

106-42-3

p-Xylene

460

1330-20-7

Xylenes (total)

320

Ionizable Organics

95-57-8

2-Chlorophenol

53,000

(Source: Amended at 26 Ill. Reg. 2683, effective February 5, 2002)

---

Section 742.APPENDIX A: General

Section 742.TABLE B: Tolerance Factor (K)

Tolerance factors (K) for one-sided normal tolerance intervals with probability level (confidence

factor) Y = 0.95 and coverage P = 95%. n = number of samples collected.

n

K

3

7.655

4

5.145

5

4.202

6

3.707

7

3.399

8

3.188

9

3.031

10

2.911

11

2.815

12

2.736

13

2.670

14

2.614

15

2.566

16

2.523

17

2.486

18

2.543

19

2.423

20

2.396

21

2.371

22

2.350

23

2.329

24

2.309

25

2.292

30

2.220

35

2.166

40

2.126

45

2.092

50

2.065

55

2.036

60

2.017

65

2.000

70

1.986

75

1.972

100

1.924

125

1.891

150

1.868

175

1.850

---

200

1.836

225

1.824

250

1.814

275

1.806

300

1.799

325

1.792

350

1.787

375

1.782

400

1.777

425

1.773

450

1.769

n

K

475

1.766

500

1.763

525

1.760

550

1.757

575

1.754

600

1.752

625

1.750

650

1.748

675

1.746

700

1.744

725

1.742

750

1.740

775

1.739

800

1.737

825

1.736

850

1.734

875

1.733

900

1.732

925

1.731

950

1.729

975

1.728

1000

1.727

---

Section 742.APPENDIX A: General

Section 742.TABLE C: Coefficients {A

N-I+1

} for W Test of Normality, for N=2(1)50

i/n

2

3

4

5

6

7

8

9

10

1

0 7071

0 7071

0 6872

0 6646

0 6431

0 6233

0 6052

0 5888

0 5739

2

---

0000

1677

2413

2806

3031

3164

3244

3291

3

---

---

---

0000

0875

1401

1743

1976

2141

4

---

---

---

---

---

0000

0561

0947

1224

5

---

---

---

---

---

---

---

0000

0399

i/n

11

12

13

14

15

16

17

18

19

20

1

0 5601

0 5475

0 5359

0 5251

0 5150

0 5056

0 4968

0 4886

0 4808

0 4734

2

3315

3325

3325

3318

3306

3290

3273

3253

3232

3211

3

2260

2347

2412

2460

2495

2521

2540

2553

2561

2565

4

1429

1586

1707

1802

1878

1939

1988

2027

2059

2085

5

0695

0922

1099

1240

1353

1447

1524

1587

1641

1686

6

0 0000

0 0303

0 0539

0 0727

0 0880

0 1005

0 1109

0 1197

0 1271

0 1334

7

---

---

0000

0240

0433

0593

0725

0837

0932

1013

8

---

---

---

---

0000

0196

0359

0496

0612

0711

9

---

---

---

---

---

---

0000

0163

0303

0422

10

---

---

---

---

---

---

---

---

0000

0140

---

i/n

21

22

23

24

25

26

27

28

29

30

1

0 4643

0 4590

0 4542

0 4493

0 4450

0 4407

0 4366

0 4328

0 4291

0 4254

2

3185

3156

3126

3098

3069

3043

3018

2992

2968

2944

3

2578

2571

2563

2554

2543

2533

2522

2510

2499

2487

4

2119

2131

2139

2145

2148

2151

2152

2151

2150

2148

5

1736

1764

1787

1807

1822

1836

1848

1857

1864

1870

6

0 1399

0 1443

0 1480

0 1512

0 1539

0 1563

0 1584

0 1601

0 1616

0 1630

7

1092

1150

1201

1245

1283

1316

1346

1372

1395

1415

8

0804

0878

0941

0997

1046

1089

1128

1162

1192

1219

9

0530

0618

0696

0764

0823

0876

0923

0965

1002

1036

10

0263

0368

0459

0539

0610

0672

0728

0778

0822

0862

11

0 0000

0 0122

0 0228

0 0321

0 0403

0 0476

0 0540

0 0598

0 0650

0 0697

12

---

---

0000

0107

0200

0284

0358

0424

0483

0537

13

---

---

---

---

0000

0094

0178

0253

0320

0381

14

---

---

---

---

---

---

0000

0084

0159

0227

15

---

---

---

---

---

---

---

---

0000

0076

---

i/n

31

32

33

34

35

36

37

38

39

40

1

0 4220

0 4188

0 4156

0 4127

0 4096

0 4068

0 4040

0 4015

0 3989

0 3964

2

2921

2898

2876

2854

2834

2813

2794

2774

2755

2737

3

2475

2463

2451

2439

2427

2415

2403

2391

2380

2368

4

2145

2141

2137

2132

2127

2121

2116

2110

2104

2098

5

1874

1878

1880

1882

1883

1883

1883

1881

1880

1878

i/n

31

32

33

34

35

36

37

38

39

40

6

0 1641

0 1651

0 1660

0 1667

0 1673

0 1678

0 1683

0 1686

0 1689

0 1691

7

1433

1449

1463

1475

1487

1496

1503

1513

1520

1526

8

1243

1265

1284

1301

1317

1331

1344

1356

1366

1376

9

1066

1093

1118

1140

1160

1179

1196

1211

1225

1237

10

0899

0931

0961

0988

1013

1036

1056

1075

1092

1108

11

0 0739

0 0777

0 0812

0 0844

0 0873

0 0900

0 0924

0 0947

0 0967

0 0986

12

0585

0629

0669

0706

0739

0770

0798

0824

0848

0870

13

0435

0485

0530

0572

0610

0645

0677

0706

0733

0759

14

0289

0344

0395

0441

0484

0523

0559

0592

0622

0651

15

0144

0206

0262

0314

0361

0404

0444

0481

0515

0546

---

16

0 0000

0 0068

0 0131

0 0187

0 0239

0 0287

0 0331

0 0372

0 0409

00444

17

---

---

0000

0062

0119

0172

0220

0264

0305

0343

18

---

---

---

---

0000

0057

0110

0158

0203

0244

19

---

---

---

---

---

---

0000

0053

0101

0146

20

---

---

---

---

---

---

---

---

0000

0049

i/n

41

42

43

44

45

46

47

48

49

50

1

0 3940

0 3917

0 3894

0 3872

0 3850

0 3830

0 3808

0 3789

0 3770

0 3751

2

2719

2701

2684

2667

2651

2635

2620

2604

2589

2574

3

2357

2345

2334

2323

2313

2302

2291

2281

2271

2260

4

2091

2085

2078

2072

2065

2058

2052

2045

2038

2032

5

1876

1874

1871

1868

1865

1862

1859

1855

1851

1847

i/n

41

42

43

44

45

46

47

48

49

50

6

0 1693

0 1694

0 1695

0 1695

0 1695

0 1695

0 1695

0 1693

0 1692

0 1691

7

1531

1535

1539

1542

1545

1548

1550

1551

1553

1554

8

1384

1392

1398

1405

1410

1415

1420

1423`

1427

1430

9

1249

1259

1269

1278

1286

1293

1300

1306

1312

1317

10

1123

1136

1149

1160

1170

1180

1189

1197

1205

1212

---

11

0 1004

0 1020

0 1035

0 1049

0 1062

0 1073

0 1085

0 1095

0 1105

0 1113

12

0891

0909

0927

0943

0959

0972

0986

0998

1010

1020

13

0782

0804

0824

0842

0860

0876

0892

0906

0919

0932

14

0677

0701

0724

0745

0775

0785

0801

0817

0832

0846

15

0575

0602

0628

0651

0673

0694

0713

0731

0748

0764

16

0 0476

0 0506

0 0534

0 0560

0 0584

0 0607

0 0628

0 0648

0 0667

0 0685

17

0379

0411

0442

0471

0497

0522

0546

0568

0588

0608

18

0283

0318

0352

0383

0412

0439

0465

0489

0511

0532

19

0188

0227

0263

0296

0328

0357

0385

0411

0436

0459

20

0094

0136

0175

0211

0245

0277

0307

0335

0361

0386

21

0 0000

0 0045

0 0087

0 0126

0 0163

0 0197

0 0229

0 0259

0 0288

0 0314

22

---

---

0000

0042

0081

0118

0153

0185

0215

0244

23

---

---

---

---

0000

0039

0076

0111

0143

0174

24

---

---

---

---

---

---

0000

0037

0071

0104

25

---

---

---

---

---

---

---

---

0000

0035

---

Section 742.APPENDIX A: General

Section 742.TABLE D: Percentage Points of the W Test for n=3(1)50

N

0.01

0.05

3

0.753

0.767

4

0.687

0.748

5

0.686

0.762

6

0.713

0.788

7

0.730

0.803

8

0.749

0.818

9

0.764

0.829

10

0.781

0.842

11

0.792

0.850

12

0.805

0.859

13

0.814

0.866

14

0.825

0.874

15

0.835

0.881

16

0.844

0.887

17

0.851

0.892

18

0.858

0.897

19

0.863

0.901

20

0.868

0.905

21

0.873

0.908

22

0.878

0.911

23

0.881

0.914

24

0.884

0.916

25

0.888

0.918

26

0.891

0.920

27

0.894

0.923

28

0.896

0.924

29

0.898

0.926

30

0.900

0.927

31

0.902

0.929

32

0.904

0.930

33

0.906

0.931

34

0.908

0.933

35

0.910

0.934

(Source: Amended at 25 Ill. Reg. 10374, effective August 15,2001)

Section 742.APPENDIX A General

Section 742.TABLE E Similar-Acting Noncarcinogenic Chemicals

Adrenal Gland

Central Nervous System

---

Nitrobenzene

Butanol (Ingestion only)

1,2,4-Trichlorobenzene (Ingestion only)

Cyanide (amenable)

2,4-Dimethylphenol

Kidney

Endrin

Acetone (Ingestion only)

Manganese

Cadmium (Ingestion only)

2-Methylphenol

Chlorobenzene

Mercury (Inhalation only)

Dalapon

Styrene (Inhalation only)

1,1-Dichloroethane

Toluene (Inhalation only)

Di-n-octyl phthalate (Ingestion only)

Xylenes (Ingestion only)

Endosulfan

Ethylbenzene

Circulatory System

Fluoranthene

Antimony

Methyl tertiary-butyl ether (Inhalation only)

Barium (Ingestion only)

Nitrobenzene

2,4-D

Pyrene

cis-1,2-Dichloroethylene (Ingestion only)

Toluene (Ingestion only)

Nitrobenzene

2,4,5-Trichlorophenol

trans-1,2-Dichloroethylene (Ingestion only)

Vinyl acetate (Ingestion only)

2,4-Dimethylphenol

Fluoranthene

Liver

Fluorene

Acenaphthene

Styrene (Ingestion only)

Acetone (Ingestion only)

Zinc

Butylbenzyl phthalate (Ingestion only)

Chlorobenzene (Ingestion only)

Gastrointestinal System

1,1-Dichloroethylene (Ingestion only)

Beryllium (Ingestion only)

Di-n-octyl phthalate (Ingestion only)

Endothall

Endrin

Hexachlorocyclopentadiene (Ingestion only)

Ethylbenzene

Methyl bromide (Ingestion only)

Fluoranthene

Methyl tertiary -butyl ether (Ingestion only)

Methyl tertiary-butyl ether (Inhalation only)

Nitrobenzene

Picloram

Styrene (Ingestion only)

2,4,5-TP (Silvex)

Toluene (Ingestion only)

1,2,4-Trichlorobenzene (Inhalation only)

2,4,5-Trichlorophenol

Immune System

2,4-Dichlorophenol

p-Chloroaniline

Mercury (Ingestion only)

---

Reproductive System

Barium (Inhalation only)

Boron (Ingestion only)

Carbon disulfide

2-Chlorophenol (Ingestion only)

1,2 Dibromo-3-Chloropropane (Inhalation

only)

Dinoseb

Ethylbenzene (Inhalation only)

Methoxychlor

Phenol

Respiratory System

1,2-Dichloropropane (Inhalation only)

1,3-Dichloropropylene (Inhalation only)

Hexachlorocyclopentadiene (Inhalation only)

Methyl bromide (Inhalation only)

Naphthalene (Inhalation only)

Toluene (Inhalation only)

Vinyl acetate (Inhalation only)

Cholinesterase Inhibition

Aldicarb

Carbofuran

Decreased Body Weight Gains

and Circulatory System Effects

Atrazine

Simazine

(Source: Amended at 31 Ill. Reg. 4063, effective February 23, 2007)

Section 742.APPENDIX A: General

Section 742.TABLE F: Similar-Acting Carcinogenic Chemicals

Kidney

Bromodichloromethane (Ingestion only)

Chloroform (Ingestion only)

1,2-Dibromo-3-chloropropane (Ingestion only)

2,4-Dinitrotoluene

2,6-Dinitrotoluene

Hexachlorobenzene

Liver

---

Aldrin

Bis(2-chloroethyl)ether

Bis(2-ethylhexyl)phthalate (Ingestion only)

Carbazole

Carbon tetrachloride

Chlordane

Chloroform (Inhalation only)

DDD

DDE

DDT

1,2-Dibromo-3-chloropropane (Ingestion only)

1,2-Dibromoethane(Ingestion only)

3,3’-Dichlorobenzidine

1,2-Dichloroethane

1,2-Dichloropropane (Ingestion only)

1,3-Dichloropropylene (Ingestion only)

Dieldrin

2,4-Dinitrotoluene

2,6-Dinitrotoluene

Heptachlor

Heptachlor epoxide

Hexachlorobenzene

alpha-HCH

gamma-HCH (Lindane)

Methylene chloride

N-Nitrosodiphenylamine

N-Nitrosodi-n-propylamine

Pentachlorophenol

Tetrachloroethylene

Trichloroethylene

2,4,6-Trichlorophenol

Toxaphene

Vinyl chloride

Circulatory System

Benzene

2,4,6-Trichlorophenol

---

Gastrointestinal System

Benzo(a)anthracene

Benzo(b)fluoranthene

Benzo(k)fluoranthene

Benzo(a)pyrene

Chrysene

Dibenzo(a,h)anthracene

Indeno(1,2,3-c,d)pyrene

Bromodichloromethane (Ingestion only)

Bromoform

1,2-Dibromo-3-chloropropane (Ingestion only)

1,2-Dibromoethane (Ingestion only)

1,3-Dichloropropylene (Ingestion only)

Lung

Arsenic (Inhalation only)

Beryllium (Inhalation only)

Cadmium (Inhalation only)

Chromium, hexavalent (Inhalation only)

1,3-Dichloropropylene (Inhalation only)

Methylene chloride (Inhalation only)

N-Nitrosodi-n-propylamine

Nickel (Inhalation only)

Vinyl chloride

Nasal Cavity

1,2-Dibromo-3-chloropropane (Inhalation only)

1,2-Dibromoethane (Inhalation only)

N-Nitrosodi-n-propylamine

Bladder

3,30-Dichlorobenzidine

1,3-Dichloropropylene (Ingestion only)

N-Nitrosodiphenylamine

(Source: Amended at 25 Ill. Reg. 10374, effective August 15, 2001)

Section 742.APPENDIX A General

Section 742.TABLE G Concentrations of Inorganic Chemicals in Background Soils

Chemical Name

Counties Within

Metropolitan

Statistical Areas

(mg/kg)

Counties Outside

Metropolitan

Statistical Areas

(mg/kg)

---

Aluminum

9,500

9,200

Antimony

4.0

3.3

Arsenic

13.0

11.3

Barium

110`

122

Beryllium

0.59

0.56

Cadmium

0.6

0.50

Calcium

9,300

5,525

Chromium

16.2

13.0

Cobalt

8.9

8.9

Copper

19.6

12.0

Cyanide

0.51

0.50

Iron

15,900

15,000

Lead

36.0

20.9

Magnesium

4,820

2,700

Manganese

636

630

Mercury

0.06

0.05

Nickel

18.0

13.0

Potassium

1,268

1,100

Selenium

0.48

0.37

Silver

0.55

0.50

Sodium

130

130.0

Sulfate

85.5

110

Sulfide

3.1

2.9

Thallium

0.32

0.42

Vanadium

25.2

25.0

Zinc

95.0

60.2

BOARD NOTE: Counties within Metropolitan Statistical Areas: Boone, Champaign, Clinton, Cook,

DuPage, Grundy, Henry, Jersey, Kane, Kankakee, Kendall, Lake, Macon, Madison, McHenry, McLean,

Menard, Monroe, Peoria, Rock Island, Sangamon, St. Clair, Tazewell, Will, Winnebago and Woodford.

(Source: Amended at 31 Ill. Reg. 4063, effective February 23, 2007)

Section 742.APPENDIX A: General

Section 742.TABLE H Concentrations of Polynuclear Aromatic Hydrocarbon Chemicals in

Background Soils

Chemical Name

Chicago

a

mg/kg

Metropolitan

Areas

b

(mg/kg)

Non-Metropolitan

Areas

c

(mg/kg)

2-Methylnaphthalene

-----

0.14

0.29

Acenaphthene

0.09

0.13

0.04

---

Acenaphthylene

0.03

0.07

0.04

Anthracene

0.25

0.40

0.14

Benzo(a)anthracene

1.1

1.8

0.72

Benzo(a)pyrene

1.3

2.1

0.98

Benzo(b)fluoranthene

1.5

2.1

0.70

Benzo(g,h,i)perylene

0.68

1.7

0.84

Benzo(k)fluoranthene

0.99

1.7

0.63

Chrysene

1.2

2.7

1.1

Dibenzo(a,h)anthracene

0.20

0.42

0.15

Fluoranthene

2.7

4.1

1.8

Fluorene

0.10

0.18

0.04

Indeno(1,2,3-c,d)pyrene

0.86

1.6

0.51

Naphthalene

0.04

0.20

0.17

Phenanthrene

1.3

2.5

0.99

Pyrene

1.9

3.0

1.2

a

Chicago means within the corporate limits of the City of Chicago.

b

Metropolitan area means a populated area, as defined in Section 742.200, (other than the City

of Chicago) that is located within any county in a Metropolitan Statistical Area listed in

Appendix A, Table G, footnote a.

c

Non-Metropolitan area means a populated area, as defined in Section 742.200, that is not

located within any county in a Metropolitan Statistical Area listed in Appendix A, Table G,

footnote a.

(Source: Appendix A, Table H renumbered to Appendix A, Table I and new Appendix A, Table

H Added at 31 Ill. Reg. 4063, effective February 23, 2007)

Section 742.APPENDIX A General

Section 742.TABLE I Chemicals Whose Tier 1 Class I Groundwater Remediation Objective

Exceeds the 1 in 1,000,000 Cancer Risk Concentration

---

Chemical

Class I Groundwater

Remediation Objective

(mg/L)

1 in 1,000,000 Cancer

Risk Concentration

(mg/L)

ADL

(mg/L)

Aldrin

0.014

0.000005

0.014

Benzo(a)pyrene

0.0002

0.000012

0.00023

Bis(2-chloroethyl)ether

0.01

0.000077

0.01

Bis(2-ethylhexyl)phthalate (Di(2-

ethylhexyl)phthalate)

0.006

0.0061

0.0027

Carbon Tetrachloride

0.005

0.00066

0.0001

Chlordane

0.002

0.000066

0.00014

DDD

0.014

0.00023

0.014

DDE

0.01

0.00023

0.01

DDT

0.006

0.00023

0.006

Dibenzo(a,h)anthracene

0.0003

0.000012

0.0003

1,2-Dibromo-3-chloropropane

0.0002

0.000061

0.001

1,2-Dibromoethane

0.00005

0.00002

0.001

3,3'-Dichlorobenzidine

0.02

0.00019

0.02

1,2-Dichloroethane

0.005

0.00094

0.0003

Dieldrin

0.009

0.0000053

0.009

2,6-Dinitrotoluene

0.00031

0.0001

0.00031

Heptachlor

0.0004

0.000019

0.013

Heptachlor epoxide

0.0002

0.0000094

0.015

Hexachlorobenzene

0.00006

0.000053

0.00006

Alpha-HCH

0.00011

0.000014

0.000111

Tetrachloroethylene

0.005

0.0016

0.0004

Toxaphene

0.003

0.000077

0.00086

Vinyl chloride

0.002

0.000045

0.0002

Ionizable Organics

N-Nitrosodi-n-propylamine

0.0018

0.000012

0.0018

Pentachlorophenol

0.001

0.00071

0.000076

2,4,6-Trichlorophenol

0.01

0.007

0.01

Inorganics

Arsenic

0.05

0.000057

0.001

(Source: Appendix A, Table I renumbered from Appendix A, Table H and amended at 31 Ill.

Reg. 4063, effective February 23, 2007)

---

Section 742.APPENDIX B Tier 1 Illustrations and Tables

Section 742.Illustration A Tier 1 Evaluation

Site

Characterization

Agricultural or

Conservation

Receptors

Tier 3

Evaluation

Residential Property

Appendix B, Table A

and Table E

Objectives

Industrial or

Commercial Property

Appendix B, Table B

and Table E

Objectives

Appendix B, Tables C & D

Soil pH determination if COC's

have pH dependent solubility

(Optional)

Determine Tier 1 remediation

objectives

(i.e., most restrictive value

from the three exposure

routes)

Compare site data to remediation objectives

and determine:

1. Which COC's are below the Tier 1 objectives

2. Which COC's are still of concern

3. Can soil averaging or compositing be used

Remediate to

Tier 1

objectives

Tier 2 evaluation for

all COC's not

eliminated in all

applicable pathways

Tier 3 evaluation

for various

situations

No Further Remediation

if all COC'c are eliminated

(Institutional controls required for

industrial/commercial objectives)

(Source: Amended at 31 Ill. Reg. 4063, effective February 23, 2007)

---

Section 742.APPENDIX B Tier 1 Illustrations and Tables

Section 742.TABLE A Tier 1 Soil Remediation Objectives

a

for Residential Properties

Exposure Route-Specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

Values

CAS No.

Chemical Name

Ingestion

(mg/kg)

Inhalation

(mg/kg)

Class I

(mg/kg)

Class II

(mg/kg)

ADL

(mg/kg)

83-32-9

Acenaphthene

4,700

b

---

c

570

b

2,900

*

67-64-1

Acetone

70,000

b

100,000

d

25

b

25

*

15972-60-8

Alachlor

o

8

e

---

c

0.04

0.2

NA

116-06-3

Aldicarb

o

78

b

---

c

0.013

0.07

NA

309-00-2

Aldrin

0.04

e

3

e

0.5

e

2.5

0.94

120-12-7

Anthracene

23,000

b

---

c

12,000

b

59,000

*

1912-24-9

Atrazine

o

2700

b

---

c

0.066

0.33

NA

71-43-2

Benzene

12

e

0.8

e

0.03

0.17

*

56-55-3

Benzo(

a

)anthracene

0.9

e,w

---

c

2

8

*

205-99-2

Benzo(

b

)fluoranthene

0.9

e,w

---

c

5

25

*

---

Exposure Route-Specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

Values

CAS No.

Chemical Name

Ingestion

(mg/kg)

Inhalation

(mg/kg)

Class I

(mg/kg)

Class II

(mg/kg)

ADL

(mg/kg)

207-08-9

Benzo(

k

)fluroanthene

9

e

---

c

49

250

*

50-32-8

Benzo(

a

)pyrene

0.09

e, w

---

c

8

82

*

111-44-4

Bis(2-chloroethyl)ether

0.6

e

0.2

e,

0.0004

e,

0.0004

0.66

117-81-7

Bis(2-ethylhexyl)phthalate

46

e

31,000

d

3,600

31,000

d

*

75-27-4

Bromodichloromethane

(Dichlorobromomethane)

10

e

3,000

d

0.6

0.6

*

75-25-2

Bromoform

81

e

53

e

0.8

0.8

*

71-36-3

Butanol

7,800

b

10,000

d

17

b

17

NA

85-68-7

Butyl benzyl phthalate

16,000

b

930

d

930

d

930

d

*

86-74-8

Carbazole

32

e

---

c

0.6

e

2.8

NA

1563-66-2

Carbofuran

o

390

b

---

c

0.22

1.1

NA

75-15-0

Carbon disulfide

7,800

b

720

d, x

32

b

160

*

---

Exposure Route-Specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

Values

CAS No.

Chemical Name

Ingestion

(mg/kg)

Inhalation

(mg/kg)

Class I

(mg/kg)

Class II

(mg/kg)

ADL

(mg/kg)

56-23-5

Carbon tetrachloride

5

e

0.3

e

0.07

0.33

*

57-74-9

Chlordane

1.8

e

72

e, x

10

48

*

106-47-8

4-Chloroaniline

(p

-Chloroaniline)

310

b

---

c

0.7

b

0.7

*

108-90-7

Chlorobenzene

(Monochlorobenzene)

1,600

b

130

b, x

1

6.5

*

124-48-1

Chlorodibromomethane

(Dibromochloromethane)

1,600

b

1,300

d

0.4

0.4

*

67-66-3

Chloroform

100

e

0.3

e

0.6

2.9

*

218-01-9

Chrysene

88

e

---

c

160

800

*

94-75-7

2,4-D

o

780

b

---

c

1.5

7.7

*

75-99-0

Dalapon

o

2,300

b

---

c

0.85

8.5

*

72-54-8

DDD

3

e

---

c

16

e

80

*

72-55-9

DDE

2

e

---

c

54

e

270

*

---

Exposure Route-Specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

Values

CAS No.

Chemical Name

Ingestion

(mg/kg)

Inhalation

(mg/kg)

Class I

(mg/kg)

Class II

(mg/kg)

ADL

(mg/kg)

50-29-3

DDT

2

e

---

g, x

32

e

160

*

53-70-3

Dibenzo(

a,h

)anthracene

0.09

e, w

---

c

2

7.6

*

96-12-8

1,2-Dibromo-3-chloropropane

0.46

e

11

b, x

0.002

0.02

*

106-93-4

1,2-Dibromoethane

(Ethylene dibromide)

0.32

e

0.06

e

0.0004

0.004

0.005

84-74-2

Di-

n

-butyl phthalate

7,800

b

2,300

d

2,300

d

2,300

d

*

95-50-1

1,2-Dichlorobenzene

(

o

– Dichlorobenzene)

7,000

b

560

d, x

17

43

*

106-46-7

1,4-Dichlorobenzene

(

p

– Dichlorobenzene)

---

c

11,000

b, x

2

11

*

91-94-1

3,3'-Dichlorobenzidine

1

e

---

c

0.007

e,

0.033

1.3

75-34-3

1,1-Dichloroethane

7,800

b

1,300

b, x

23

b

110

*

---

Exposure Route-Specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

Values

CAS No.

Chemical Name

Ingestion

(mg/kg)

Inhalation

(mg/kg)

Class I

(mg/kg)

Class II

(mg/kg)

ADL

(mg/kg)

107-06-2

1,2-Dichloroethane

(Ethylene dichloride)

7

e

0.4

e

0.02

0.1

*

75-35-4

1,1-Dichloroethylene

3,900

b

290

b, x

0.06

0.3

*

156-59-2

cis

-1,2-Dichloroethylene

780

b

1,200

d

0.4

1.1

*

156-60-5

trans

-1,2-Dichloroethylene

1,600

b

3,100

d

0.7

3.4

*

78-87-5

1,2-Dichloropropane

9

e

15

b, x

0.03

0.15

*

542-75-6

1,3-Dichloropropene

(1,3-Dichloropropylene,

cis

+

trans

)

6.4

e

1.1

e, x

0.004

e

0.02

0.005

60-57-1

Dieldrin

n

0.04

e

1

e

0.004

e

0.02

0.603

84-66-2

Diethyl phthalate

63,000

b

2,000

d

470

b

470

*

105-67-9

2,4-Dimethylphenol

1,600

b

---

c

9

b

9

*

121-14-2

2,4-Dinitrotoluene

0.9

e

---

c

0.0008

e,

0.0008

0.250

---

Exposure Route-Specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

Values

CAS No.

Chemical Name

Ingestion

(mg/kg)

Inhalation

(mg/kg)

Class I

(mg/kg)

Class II

(mg/kg)

ADL

(mg/kg)

606-20-2

2,6-Dinitrotoluene

0.9

e

---

c

0.0007

e

0.0007

0.260

117-84-0

Di-

n

-octyl phthalate

1,600

b

10,000

d

10,000

d

10,000

d

*

115-29-7

Endosulfan

o

470

b

---

c

18

b

90

*

145-73-3

Endothall

o

1,600

b

---

c

0.4

0.4

NA

72-20-8

Endrin

23

b

---

c

1

5

*

100-41-4

Ethylbenzene

7,800

b

400

d, x

13

19

*

206-44-0

Fluoranthene

3,100

b

---

c

4,300

b

21,000

*

86-73-7

Fluorene

3,100

b

---

c

560

b

2,800

*

76-44-8

Heptachlor

0.1

e

0.1

e

23

110

0.871

1024-57-3

Heptachlor epoxide

0.07

e

5

e

0.7

3.3

1.005

118-74-1

Hexachlorobenzene

0.4

e

1

e

2

11

*

319-84-6

Alpha

-HCH (

alpha

-BHC)

0.1

e

0.8

e

0.0005

e,

0.003

0.0074

---

Exposure Route-Specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

Values

CAS No.

Chemical Name

Ingestion

(mg/kg)

Inhalation

(mg/kg)

Class I

(mg/kg)

Class II

(mg/kg)

ADL

(mg/kg)

58-89-9

Gamma

-HCH (Lindane)

n

0.5

e

---

c, x

0.009

0.047

*

77-47-4

Hexachlorocyclopentadiene

550

b

10

b, x

400

2,200

d

*

67-72-1

Hexachloroethane

78

b

---

c

0.5

b

2.6

*

193-39-5

Indeno(1,2,3-

c,d

)pyrene

0.9

e,w

---

c

14

69

*

78-59-1

Isophorone

15,600

b

4,600

d

8

b

8

*

72-43-5

Methoxychlor

o

390

b

---

c

160

780

*

74-83-9

Methyl bromide

(Bromomethane)

110

b

10

b, x

0.2

b

1.2

*

1634-04-4

Methyl tertiary-butyl ether

780

b

8,800

d, x

0.32

0.32

*

75-09-2

Methylene chloride

(Dichloromethane)

85

e

13

e

0.02

e

0.2

*

95-48-7

2-Methylphenol

(

o

– Cresol)

3,900

b

---

c

15

b

15

*

91-20-3

Naphthalene

1,600

b

170

b, x

12

b

18

*

98-95-3

Nitrobenzene

39

b

92

b, x

0.1

b,

0.1

0.26

---

Exposure Route-Specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

Values

CAS No.

Chemical Name

Ingestion

(mg/kg)

Inhalation

(mg/kg)

Class I

(mg/kg)

Class II

(mg/kg)

ADL

(mg/kg)

86-30-6

N

-Nitrosodiphenylamine

130

e

---

c

1

e

5.6

*

621-64-7

N

-Nitrosodi-

n

-propylamine

0.09

e,

---

c

0.00005

e,

0.00005

0.0018

108-95-2

Phenol

23,000

b

---

c

100

b

100

*

1918-02-1

Picloram

o

5,500

b

---

c

2

20

NA

1336-36-3

Polychlorinated biphenyls (PCBs)

n

1

h

---

c,h

---

h

---

h

*

129-00-0

Pyrene

2,300

b

---

c

4,200

b

21,000

*

122-34-9

Simazine

o

390

b

---

c

0.04

0.37

NA

100-42-5

Styrene

16,000

b

1,500

d, x

4

18

*

127-18-4

Tetrachloroethylene

(Perchloroethylene)

12

e

11

e

0.06

0.3

*

108-88-3

Toluene

16,000

b

650

d, x

12

29

*

---

Exposure Route-Specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

Values

CAS No.

Chemical Name

Ingestion

(mg/kg)

Inhalation

(mg/kg)

Class I

(mg/kg)

Class II

(mg/kg)

ADL

(mg/kg)

8001-35-2

Toxaphene

n

0.6

e

89

e

31

150

*

120-82-1

1,2,4-Trichlorobenzene

780

b

3,200

b, x

5

53

*

71-55-6

1,1,1-Trichloroethane

---

c

1,200

d

2

9.6

*

79-00-5

1,1,2-Trichloroethane

310

b

1,800

d

0.02

0.3

*

79-01-6

Trichloroethylene

58

e

5

e

0.06

0.3

*

108-05-4

Vinyl acetate

78,000

b

1,000

b, x

170

b

170

*

75-01-4

Vinyl chloride

0.46

e

0.28

e

0.01

0.07

*

108-38-3

m-Xylene

16,000

b

420

d, x

210

210

*

95-47-6

o-Xylene

16,000

b

410

d, x

190

190

*

106-42-3

p-Xylene

16,000

b

460

d, x

200

200

*

---

Exposure Route-Specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

Values

CAS No.

Chemical Name

Ingestion

(mg/kg)

Inhalation

(mg/kg)

Class I

(mg/kg)

Class II

(mg/kg)

ADL

(mg/kg)

1330-20-7

Xylenes (total)

16,000

b

320

d, x

150

150

*

Ionizable Organics

65-85-0

Benzoic Acid

310,000

b

---

c

400

b,i

400

i

*

95-57-8

2-Chlorophenol

390

b

53,000

d

4

b,i

4

i

*

120-83-2

2,4-Dichlorophenol

230

b

---

c

1

b,i

1

i

*

51-28-5

2,4-Dinitrophenol

160

b

---

c

0.2

b,

0.2

3.3

88-85-7

Dinoseb

o

78

b

---

c

0.34

b,i

3.4

i

*

87-86-5

Pentachlorophenol

3

e,j

---

c

0.03

i

0.14

i

*

93-72-1

2,4,5-TP

(Silvex)

630

b

---

c

11

i

55

i

*

95-95-4

2,4,5-Trichlorophenol

7,800

b

---

c

270

b,i

1,400

i

*

88-06-2

2,4,6 Trichlorophenol

58

e

200

e

0.2

e, i

0.77

i

0.66

---

Exposure Route-specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

Values

CAS No.

Chemical Name

Ingestion

(mg/kg)

Inhalation

(mg/kg)

Class I

(mg/L)

Class II

(mg/L)

ADL

(mg/kg)

Inorganics

7440-36-0

Antimony

31

b

---

c

0.006

m

0.024

m

*

7440-38-2

Arsenic

l,n

---

t

750

e

0.05

m

0.2

m

*

7440-39-3

Barium

5,500

b

690,000

b

2.0

m

2.0

m

*

7440-41-7

Beryllium

160

b

1,300

e

0.004

m

0.5

m

*

7440-42-8