ILLINOIS POLLUTION CONTROL BOARD

Section 742.APPENDIX A: General
Methyl tert-butyl etherMethyl tertiary-butyl ether
1. _
  1. _
    1. (Source: Amended at 25 Ill. Reg. ______, effective ________)
      - _
Adrenal GlandCentral Nervous System
Immune System
Reproductive System
Respiratory System
Cholinesterase Inhibition
Decreased Body Weight Gains
Methyl tert-butyl etherMethyl tertiary-butyl ether
1. _
  1. _
    1. _
      - ADL
      - ADL
      - ADL
2. I, Dorothy M. Gunn, Clerk of the Illinois Pollution Control Board, certify that the Board adopted the above opinion and order December 6, 2001, by a vote of 5-0.

December 6, 2001

IN THE MATTER OF:

PROPOSED AMENDMENTS TO TIERED

APPROACH TO CORRECTIVE ACTION

OBJECTIVES (TACO) (MTBE): 35 ILL.

ADM. CODE 742

)

R00-19(C)

(Rulemaking – Land)

Proposed Rule. Second Notice.

OPINION AND ORDER OF THE BOARD (by C.A. Manning, N.J. Melas, R.C. Flemal):

On May 15, 2000, the Illinois Environmental Protection Agency (Agency) filed a

proposal to amend 35 Ill. Adm. Code 742 of the Board’s land regulations, commonly referred to

as the Tiered Approach to Corrective Action Objectives (TACO) rules. The Board accepted this

matter for hearing on May 18, 2000. On July 27, 2000, the Board moved the Agency’s proposed

rulemaking to first notice. In doing so, the Board divided the proposal into two subdockets, A

and B.

The cleanup standards for methyl tertiary-butyl ether (MTBE) were originally proposed

at first notice as part of the Board’s first-notice opinion and order in R00-19(B).

See

Proposed

Amendments to Tiered Approach to Corrective Action Objectives (TACO): 35 Ill. Adm. Code

742, R00-19(B) (July 27, 2000).

On June 7, 2001, the Board opened this Subdocket C for the purpose of addressing

separately the proposed MTBE cleanup standards that were originally contained in Subdocket B.

The Board adopted its first-notice opinion and order in this matter on September 6, 2001, and it

was published on September 21, 2001. 25 Ill. Reg. 11994. It is these proposed MTBE cleanup

standards that the Board is adopting today for second notice.

The Board intends to coordinate this rulemaking with another pending Agency proposal

that would add groundwater quality standards for MTBE.

See generally

Proposed MTBE

Groundwater Quality Standards Amendments: 35 Ill. Adm. Code 620, R01-14.

By today’s action, the Board sends this proposal to second notice, pursuant to the

Administrative Procedure Act (5 ILCS 100/1-1

et seq

. (2000)), for consideration by the Joint

Committee on Administrative Rules (JCAR).

PROCEDURAL HISTORY

Tiered Approach to Corrective Action Objectives (TACO): 35 Ill. Adm. Code 742, R00-19(A)),

and the Subdocket B amendments were adopted on July 26, 2001 (Proposed Amendments to

Tiered Approach to Corrective Action Objectives (TACO): 35 Ill. Adm. Code 742, R00-19(B)).

The subject matter of this proposal was discussed at three public hearings: two in

Chicago on August 25, 2000 and September 21, 2000; and one in Springfield on September 11,

2000. A variety of witnesses testified regarding the proposed MTBE standards, including:

Douglas Clay, Manager of the Leaking Underground Storage Tank Section of the Agency’s

Bureau of Land; Thomas Hornshaw, Senior Public Service Administrator and Manager of the

Agency’s Toxicity Assessment Unit, Office of Chemical Safety; Richard Cobb, Manager of the

Groundwater Section of the Agency’s Bureau of Water; and David Sykuta on behalf of the

Illinois Petroleum Council (Petroleum Council). The Agency also offered two exhibits at

hearing.

The first-notice public comment period began with the September 21, 2001 publication of

the Board’s first-notice opinion and order in the

Illinois Register

, and ended on November 5,

2001. During the first-notice public comment period, the Board received two public comments.

The Agency filed supplemental comments and exhibits on October 11, 2001 (PC 1).

Additionally, on November 1, 2001, the Petroleum Council filed comments (PC 2). Both

comments support the substance of the proposal.

DISCUSSION OF SUBDOCKET C SECOND NOTICE PROPOSAL

There have been only a few minor, non-substantive changes to the rule from that

proposed by the Board in its first notice opinion and order. These minor changes amount to

basically typographical changes prompted by comments from JCAR. The public comments,

discussed in more detail below, did not seek to change the substance of the rule proposed at first

notice, and accordingly, no changes were made in response to those comments.

Public Comments

The Agency filed its supplemental comments in response to a Board request and, “in the

interest of establishing a more complete, technically sound record.” PC 1 at 1. In Exhibit 1 to its

comments, the Agency provided the Board with further explanation regarding the manner in

which it calculated the proposed MTBE remediation standards. Specifically, the Agency

provided a detailed analysis of the Health Advisory that was proposed by the Agency in 1994 for

MTBE. According to the Agency, the “Health Advisory served as a base for determining

remediation objectives for groundwater in this proceeding.” PC 1 at 2. The Agency’s public

comment also provided a supplementation to the Agency’s calculation of the proposed soil

remediation objectives for MTBE.

See

PC 1, Exh. 2.

Exhibit 1 to the Agency’s public comment is a “Notice of Health Advisory for Methyl

Tertiary-Butyl Ether (MTBE).” In this June 9, 1994 document, the Agency stated that, “[a]s a

result of routine monitoring of public water supply systems, the gasoline additive Methyl

Tertiary-Butyl Ether (MTBE) has been detected at least in two public water supplies. . . . [and as

a result, the Agency] is announcing its intention to issue a health advisory.” PC 1, Exh. 1 at 1.

The remainder of this exhibit offers a detailed explanation regarding the Agency’s decision to

issue a precautionary health advisory concentration for MTBE of 70 parts per billion for public

water supplies.

Exhibit 2 to the Agency’s public comment contains additional explanation regarding the

Agency’s calculation of the soil remediation objectives for MTBE. In Exhibit 2, the Agency

provides that:

Calculation of the soil remediation objectives was accomplished through

use of the risk-based soil screening level (SSL) equations from 742.Appendix C,

Table A of TACO. Default exposure durations and contact rates from

742.Appendix C, Table B of TACO were used in these calculations. . . .

TACO equation S1 was used to calculate the soil ingestion exposure route

cleanup objectives. The inhalation exposure route remediation objectives were

calculated using equation S4 for the residential and industrial/commercial

scenarios and equation S5 was used for the construction worker. Equations S17

and S18 were used to calculate the soil component of the groundwater ingestion

exposure route objectives. The saturation limit (Csat) for MTBE was calculated

using equation S29. Csat may be substituted for the inhalation objective, if lower,

due to MTBE’s melting point of –109 degrees C. PC 1, Exh. 2 at 1-2.

With its supplemental comments, the Agency provided further justification and

explanation of the manner in which the proposed MTBE remediation objectives were calculated.

The Board appreciates this supplementation and the additional support it gives for the

remediation objectives proposed in both the first and second notice opinions and orders.

A public comment was also filed by the Petroleum Council. In its comments, the

Petroleum Council expressed its support for the proposed MTBE standards:

The [Petroleum Council] supports the Board’s action in adopting the Illinois

Environmental Protection Agency’s proposed MTBE standards. . . . the record

compiled before the Board included a comprehensive discussion of the scientific

information available regarding MTBE and supports the proposed standards. . . .

[n]o one testified in opposition to the proposed standard . . . the Board should

adopt the MTBE values proposed by the Agency. PC 2 at 1.

The Petroleum Council also commented on the Board’s purported inability to treat

MTBE as a carcinogen. The Petroleum Council presented “the most recent evaluations of

MTBE by the main independent health organizations,” (PC 2 at 2) including: the International

Agency for Research on Cancer; the National Toxicology Program; the Office of Environmental

Health Hazard Assessment; the World Health Organization; and the European Union MTBE

Risk Assessment.

See generally

PC 2. According to the Petroleum Council, “[t]hese findings

indicate that MTBE has not been determined to be a human carcinogen and does not fall into the

categories required by the [Environmental Protection] Act for the Board to determine that it

should be treated as a carcinogen.” PC 2 at 2.

Accordingly, the Petroleum Council urges the Board to adopt the remediation objectives

proposed by the Agency and previously adopted by the Board for first notice.

Board Discussion

The Board appreciates the comments by the Agency and the Petroleum Council, which

offer further support for these proposed standards.

The Board again recognizes that there is evidence suggesting the possible carcinogenicity

of MTBE. However, the Board remains convinced that, in adopting standards for 35 Ill. Adm.

Code 742, it cannot consider MTBE to be a carcinogen unless the contaminant meets the

definition of a “carcinogen” found at Section 58.2 of the Environmental Protection Act (Act)

(415 ILCS 5/58.2 (2000)) and again at 35 Ill. Adm. Code 742.200. As of this date, MTBE

cannot be regulated as a human carcinogen pursuant to Section 58.2 of the Act. Accordingly, the

Board will proceed to second notice with the remediation objectives originally proposed by the

Agency and adopted by the Board for first notice on September 6, 2001.

Since no public comments were received which questioned the Board’s legal or technical

conclusions in this regard, and since three public hearings have already been held on the subject

matter of this Subdocket C, the Board concludes that no further public hearings are necessary

before proceeding to second notice with the proposed regulations.

ORDER

The Board directs the Clerk to cause the filing of the following with the Joint Committee

on Administrative Rules for second-notice review.

TITLE 35: ENVIRONMENTAL

PROTECTION

SUBTITLE G: WASTE DISPOSAL

CHAPTER I: POLLUTION CONTROL BOARD

SUBCHAPTER f: RISK BASED CLEANUP OBJECTIVES

PART 742

TIERED APPROACH TO CORRECTIVE ACTION OBJECTIVES

SUBPART A: INTRODUCTION

Section

742.100 Intent and Purpose

742.105 Applicability

742.110 Overview of Tiered Approach

742.115 Key Elements

742.120 Site Characterization

SUBPART B: GENERAL

Section

742.200 Definitions

742.205 Severability

742.210 Incorporations by Reference

742.215 Determination of Soil Attenuation Capacity

742.220 Determination of Soil Saturation Limit

742.225 Demonstration of Compliance with Remediation Objectives

742.230 Agency Review and Approval

SUBPART C: EXPOSURE ROUTE EVALUATIONS

Section

742.300 Exclusion of Exposure Route

742.305 Contaminant Source and Free Product Determination

742.310 Inhalation Exposure Route

742.315 Soil Ingestion Exposure Route

742.320 Groundwater Ingestion Exposure Route

SUBPART D: DETERMINING AREA BACKGROUND

Section

742.400 Area Background

742.405 Determination of Area Background for Soil

742.410 Determination of Area Background for Groundwater

742.415 Use of Area Background Concentrations

SUBPART E: TIER 1 EVALUATION

Section

742.500 Tier 1 Evaluation Overview

742.505 Tier 1 Soil and Groundwater Remediation Objectives

742.510 Tier 1 Remediation Objectives Tables

SUBPART F: TIER 2 GENERAL EVALUATION

Section

742.600 Tier 2 Evaluation Overview

742.605 Land Use

742.610 Chemical and Site Properties

SUBPART G: TIER 2 SOIL EVALUATION

Section

742.700 Tier 2 Soil Evaluation Overview

742.705 Parameters for Soil Remediation Objective Equations

742.710 SSL Soil Equations

742.715 RBCA Soil Equations

742.720 Chemicals with Cumulative Noncarcinogenic Effects

SUBPART H: TIER 2 GROUNDWATER EVALUATION

Section

742.800 Tier 2 Groundwater Evaluation Overview

742.805 Tier 2 Groundwater Remediation Objectives

742.810 Calculations to Predict Impacts from Remaining Groundwater Contamination

SUBPART I: TIER 3 EVALUATION

Section

742.900 Tier 3 Evaluation Overview

742.905 Modifications of Parameters

742.910 Alternative Models

742.915 Formal Risk Assessments

742.920 Impractical Remediation

742.925 Exposure Routes

742.930 Derivation of Toxicological Data

SUBPART J: INSTITUTIONAL CONTROLS

Section

742.1000 Institutional Controls

742.1005 No Further Remediation Letters

742.1010 Environmental Land Use Controls

742.1012 Federally Owned Property: Land Use Control Memorandums of Agreement

742.1015 Ordinances

742.1020 Highway Authority Agreements

SUBPART K: ENGINEERED BARRIERS

Section

742.1100 Engineered Barriers

742.1105 Engineered Barrier Requirements

APPENDIX A General

ILLUSTRATION A Developing Soil Remediation Objectives Under the Tiered Approach

ILLUSTRATION B Developing Groundwater Remediation Objectives Under the Tiered

Approach

TABLE A Soil Saturation Limits (Csat) for Chemicals Whose Melting Point is Less than

TABLE B Tolerance Factor (K)

TABLE C Coefficients {AN-I+1} for W Test of Normality, for N=2(1)50

TABLE D Percentage Points of the W Test for n=3(1)50

TABLE E Similar-Acting Noncarcinogenic Chemicals

TABLE F Similar-Acting Carcinogenic Chemicals

TABLE G Concentrations of Inorganic Chemicals in Background Soils

TABLE H Chemicals Whose Tier 1 Class I Groundwater Remediation Objective Exceeds

the 1 in 1,000,000 Cancer Risk Concentration

APPENDIX B Tier 1 Tables and Illustrations

ILLUSTRATION A Tier 1 Evaluation

TABLE A Tier 1 Soil Remediation Objectives for Residential Properties

TABLE B Tier 1 Soil Remediation Objectives for Industrial/Commercial Properties

TABLE C pH Specific Soil Remediation Objectives for Inorganics and Ionizing Organics

for the Soil Component of the Groundwater Ingestion Route (Class I

Groundwater)

TABLE D pH Specific Soil Remediation Objectives for Inorganics and Ionizing Organics

for the Soil Component of the Groundwater Ingestion Route (Class II

Groundwater)

TABLE E Tier 1 Groundwater Remediation Objectives for the Groundwater Component of

the Groundwater Ingestion Route

TABLE F Values Used to Calculate the Tier 1 Soil Remediation Objectives for the Soil

Component of the Groundwater Ingestion Route

APPENDIX C Tier 2 Tables and Illustrations

ILLUSTRATION A Tier 2 Evaluation for Soil

ILLUSTRATION B Tier 2 Evaluation for Groundwater

ILLUSTRATION C US Department of Agriculture Soil Texture Classification

TABLE A SSL Equations

TABLE B SSL Parameters

TABLE C RBCA Equations

TABLE D RBCA Parameters

TABLE E Default Physical and Chemical Parameters

TABLE F Methods for Determining Physical Soil Parameters

TABLE G Error Function (erf)

TABLE H Q/C Values By Source Area

TABLE I Koc Values for Ionizing Organics as a Function of pH (cm

/g or L/kg or

water/gsoil)

TABLE J Values to be Substituted for kd or ks when Evaluating Inorganics as a Function

of pH (cm

/g or L/kg or cm

water/gsoil)

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

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 25 Ill. Reg. ____, effective _____.

NOTE: Capitalization indicates statutory language.

Section 742.APPENDIX A: General

Section 742.TABLE A: Soil Saturation Limits (Csat)for Chemicals Whose Melting Point is Less

111-44-4 Bis(2-chloroethyl)ether

3,300

117-81-7 Bis(2-ethylhexyl)phthalate

31,000

75-27-4 Bromodichloromethane

(Dichlorobromomethane)

Butyl benzyl phthalate

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)

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

100-41-4 Ethylbenzene

400

77-47-4 Hexachlorocyclopentadiene

Methyl bromide (Bromomethane)

3,200

1634-04-4 Methyl tert-butyl etherMethyl tertiary-butyl ether 8,800

75-09-2

Methylene chloride (Dichloromethane)

127-18-4 Tetrachloroethylene

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

1330-20-7 Xylenes (total)

320

Ionizable

Organics

95-57-8 2-Chlorophenol

53,000

(Source: Amended at 25 Ill. Reg. ______, effective ________)

Section 742.APPENDIX A: General

Section 742.TABLE E: Similar-Acting Noncarcinogenic Chemicals

Kidney

Central Nervous System

Acetone

Butanol (Ingestion only)

Cadmium (Ingestion only)

Di-n-octyl phthalate (Ingestion only)

2-Methylphenol

Endosulfan

Mercury (Inhalation only)

Ethylbenzene

Styrene (Inhalation only)

Fluoranthene

Toluene (Inhalation only)

Nitrobenzene

Xylenes (Ingestion only)

Pyrene

Toluene (Ingestion only)

Circulatory System

2,4,5-Tricholorphenol

Antimony

Vinyl Acetate (Ingestion only)

Barium (Ingestion only)

2,4-D

Liver

cis-1,2-Dichloroethylene (Ingestion only)

Acenaphthene

Nitrobenzene

Acetone (Ingestion only)

trans-1,2-Dichloroethylene (Ingestion only)

Butylbenzyl phthalate (Ingestion only)

2,4-Dimethylphenol

Chlorobenzene (Ingestion only)

Fluoranthene

1,1-Dichloroethylene (Ingestion only)

Fluorene

Di-n-octyl phthalate (Ingestion only)

Styrene (Ingestion only)

Gastrointestinal System

Nitrobenzene

Beryllium (Ingestion only)

Picloram

Endothall

Styrene (Ingestion only)

Hexachlorocyclopentadiene (Ingestion only)

2,4,5-TP (Silvex)

Methyl bromide (Ingestion only)

Toluene (Ingestion only)

1,2,4-Trichlorobenzene (Inhalation only)

2,4,5-Trichlorophenol

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

Cholinesterase Inhibition

Aldicarb

Carbofuran

Decreased Body Weight Gains

and Circulatory System Effects

1,2,4-Trichlorobenzene (ingestion only)

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)

Immune System

2,4-Dichlorophenol

p-Chloroaniline

Mercury (Ingestion only)

Adrenal Gland

Central Nervous System

1,2,4-Trichlorobenzene (Ingestion only)

Cyanide

(amenable)

2,4-Demethylphenol2,4-Dimethylphenol

Kidney

Endrin

Acetone (Ingestion only)

Manganese

Cadmium (Ingestion only)

2,Methylphenol2-Methylphenol

Chlorobenzene Mercury

Di-n-octyl phthalate (Ingestion only) Xylenes

Methyl tert-butyl ether (Inhalation only)

Barium (Ingestion only)

Methyl tertiary-butyl ether (Inhalation only) 2,4-D

Nitrobenzene cis-1,2-Dichloroethylene

Toluene (Ingestion only)

trans-1,2-Dichloroethylene

(Ingestion

only)

2,4,5-Trichlorophenol

2,4-Dimethylphenol

Vinyl acetate (Ingestion only)

Acetone (Ingestion only)

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

Methyl tert-butyl ether (Ingestion only)

Methyl tert-butyl ether (Inhalation only) 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 (Inahalation 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 25 Ill. Reg. _____, effective _____)

Section 742.APPENDIX B: Tier 1 Tables and Illustrations

Section 742.TABLE A: Tier 1 Soil Remediation Objectives

for Residential Properties

Exposure Route-Specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

Exposure Route-Specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

Bis(2-chloroethyl)ether

Bis(2-ethylhexyl)phthalate

(Dichlorobromomethane)

Butyl benzyl phthalate

Exposure Route-Specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

(Dibromochloromethane)

Exposure Route-Specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

a,h

1,2-Dibromo-3-chloropropane

3,3'-Dichlorobenzidine

Exposure Route-Specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

(Ethylene dichloride)

cis

-1,2-Dichloroethylene

trans

-1,2-Dichloroethylene

(1,3-Dichloropropylene,

cis

trans

Exposure Route-Specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

Alpha

alpha

Exposure Route-Specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

Gamma

Hexachlorocyclopentadiene

c,d

1634-04-4 Methyl tert-butyl etherMethyl

Exposure Route-Specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

-Nitrosodiphenylamine

Polychlorinated biphenyls (PCBs)

Exposure Route-Specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

1,2,4-Trichlorobenzene

780

3,200

71-55-6

1,1,1-Trichloroethane

1,1,2-Trichloroethane

Exposure Route-Specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

Ionizable Organics

2,4,5-Trichlorophenol

2,4,6 Trichlorophenol

Exposure Route-specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

Inorganics

Chromium, ion, trivalent

120,000

---

18540-29-9

Chromium, ion, hexavalent

Exposure Route-specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

Exposure Route-specific Values for Soils

Soil Component of the Groundwater

Ingestion Exposure Route

"*" indicates that the ADL is less than or equal to the specified remediation objective.

NA means not available; no PQL or EQL available in USEPA analytical methods.

Chemical Name and Soil Remediation Objective Notations

Soil remediation objectives based on human health criteria only.

Calculated values correspond to a target hazard quotient of 1.

No toxicity criteria available for the route of exposure.

Soil saturation concentration (C [[sat]) = the concentration at which the absorptive limits of the soil particles, the solubility limits of the available soil moisture, and saturation

of soil pore air have been reached. Above the soil saturation concentration, the assumptions regarding vapor transport to air and/or dissolved phase transport to

groundwater (for chemicals which are liquid at ambient soil temperatures) have been violated, and alternative modeling approaches are required.

Calculated values correspond to a cancer risk level of 1 in 1,000,000.

Level is at or below Contract Laboratory Program required quantitation limit for Regular Analytical Services (RAS).

Chemical-specific properties are such that this route is not of concern at any soil contaminant concentration.

40 CFR 761 contains applicability requirements and methodologies for the development of PCB remediation objectives. Requests for approval of a Tier 3 evaluation must

address the applicability of 40 CFR 761.

Soil remediation objective for pH of 6.8. If soil pH is other than 6.8, refer to Appendix B, Tables C and D of this Part.

Ingestion soil remediation objective adjusted by a factor of 0.5 to account for dermal route.

A preliminary remediation goal of 400 mg/kg has been set for lead based on

Revised Interim Soil Lead Guidance for CERCLA Sites and RCRA Corrective Action Facilities

OSWER Directive #9355.4-12.

Potential for soil-plant-human exposure.

The person conducting the remediation has the option to use: 1) TCLP or SPLP test results to compare with the remediation objectives listed in this Table; or 2) the total

amount of contaminant in the soil sample results to compare with pH specific remediation objectives listed in Appendix B, Table C or D of this Part. (See Section

742.510.) If the person conducting the remediation wishes to calculate soil remediation objectives based on background concentrations, this should be done in accordance

with Subpart D of this Part.

The Agency reserves the right to evaluate the potential for remaining contaminant concentrations to pose significant threats to crops, livestock, or wildlife.

For agrichemical facilities, remediation objectives for surficial soils which are based on field application rates may be more appropriate for currently registered pesticides.

Consult the Agency for further information.

For agrichemical facilities, soil remediation objectives based on site-specific background concentrations of Nitrate as N may be more appropriate. Such determinations

shall be conducted in accordance with the procedures set forth in Subparts D and I of this Part.

The TCLP extraction must be done using water at a pH of 7.0.

Value based on dietary Reference Dose.

Value for Ingestion based on Reference Dose for Mercuric chloride (CAS No. 7487-94-7); value for Inhalation based on Reference Concentration for elemental Mercury

(CAS No. 7439-97-6).

For the ingestion route for arsenic, see 742.Appendix A, Table G.

Value based on Reference Dose for Thallium sulfate (CAS No. 7446-18-6).

(Source: Amended at 25 Ill. Reg. _____, effective _____)

Section 742.APPENDIX B: Tier 1 Tables and Illustrations

Section 742.Table B: Tier 1 Soil Remediation Objectives

for Industrial/Commercial Properties

Exposure Route-Specific Values for Soils

Soil Component of the

Groundwater Ingestion

Exposure Route-Specific Values for Soils

Soil Component of the

Groundwater Ingestion

Bis(2-chloroethyl)ether

Bis(2-ethylhexyl)phthalate

(Dichlorobromomethane)

Butyl benzyl phthalate

Exposure Route-Specific Values for Soils

Soil Component of the

Groundwater Ingestion

(Dibromochloromethane)

Exposure Route-Specific Values for Soils

Soil Component of the

Groundwater Ingestion

a,h

1,2-Dibromo-3-chloropropane

Exposure Route-Specific Values for Soils

Soil

Component of the

Groundwater Ingestion

3,3'-Dichlorobenzidine

(Ethylene dichloride)

cis

-1,2-Dichloroethylene

Trans

-1,2-Dichloroethylene

(1,3-Dichloropropylene,

cis

trans

Exposure Route-Specific Values for Soils

Soil Component of the

Groundwater Ingestion

Exposure Route-Specific Values for Soils

Soil Component of the

Groundwater Ingestion

Alpha

alpha

Gamma

Hexachlorocyclopentadiene

c,d

Exposure Route-Specific Values for Soils

Soil Component of the

Groundwater Ingestion

1634-04-4 Methyl tert-butyl etherMethyl

-Nitrosodiphenylamine

Polychlorinated biphenyls (PCBs)

Exposure Route-Specific Values for Soils

Soil Component of the

Groundwater Ingestion

1,2,4-Trichlorobenzene

1,1,1-Trichloroethane

1,1,2-Trichloroethane

Exposure Route-Specific Values for Soils

Soil Component of the

Groundwater Ingestion

Ionizable Organics

Exposure Route-Specific Values for Soils

Soil Component of the

Groundwater Ingestion

2,4,5-Trichlorophenol

Exposure Route-Specific Values for Soils

Soil Component of the

Groundwater Ingestion

Inorganics

Chromium, ion, trivalent

Chromium, ion, hexavalent

Exposure Route-Specific Values for Soils

Soil Component of the

Groundwater Ingestion

Exposure Route-Specific Values for Soils

Soil Component of the

Groundwater Ingestion

"*" indicates that the ADL is less than or equal to the specified remediation objective.

NA means Not Available; no PQL or EQL available in USEPA analytical methods.

Chemical Name and Soil Remediation Objective Notations (2nd, 5th thru 8th Columns)

Soil remediation objectives based on human health criteria only.

Calculated values correspond to a target hazard quotient of 1.

No toxicity criteria available for this route of exposure.

Soil saturation concentration (C[sat]) = the concentration at which the absorptive limits of the soil particles, the solubility limits

of the available soil moisture, and saturation of soil pore air have been reached. Above the soil saturation concentration, the

assumptions regarding vapor transport to air and/or dissolved phase transport to groundwater (for chemicals which are liquid at

ambient soil temperatures) have been violated, and alternative modeling approaches are required.

Calculated values correspond to a cancer risk level of 1 in 1,000,000.

Level is at or below Contract Laboratory Program required quantitation limit for Regular Analytical Services (RAS).

Chemical-specific properties are such that this route is not of concern at any soil contaminant concentration.

40 CFR 761 contains applicability requirements and methodologies for the development of PCB remediation objectives.

Requests for approval of a Tier 3 evaluation must address the applicability of 40 CFR 761.

Soil remediation objective for pH of 6.8. If soil pH is other than 6.8, refer to Appendix B, Tables C and D in this Part.

Ingestion soil remediation objective adjusted by a factor of 0.5 to account for dermal route.

A preliminary remediation goal of 400 mg/kg has been set for lead based on

Revised Interim Soil Lead Guidance for CERCLA

Sites and RCRA Corrective Action Facilities

, OSWER Directive #9355.4-12.

Potential for soil-plant-human exposure.

The person conducting the remediation has the option to use: (1) TCLP or SPLP test results to compare with the remediation

objectives listed in this Table; or (2) the total amount of contaminant in the soil sample results to compare with pH specific

remediation objectives listed in Appendix B, Table C or D of this Part. (See Section 742.510.) If the person conducting the

remediation wishes to calculate soil remediation objectives based on background concentrations, this should be done in

accordance with Subpart D of this Part.

The Agency reserves the right to evaluate the potential for remaining contaminant concentrations to pose significant threats to

crops, livestock, or wildlife.

For agrichemical facilities, remediation objectives for surficial soils which are based on field application rates may be more

appropriate for currently registered pesticides. Consult the Agency for further information.

For agrichemical facilities, soil remediation objectives based on site-specific background concentrations of Nitrate as N may be

more appropriate. Such determinations shall be conducted in accordance with the procedures set forth in Subparts D and I of

this Part.

The TCLP extraction must be done using water at a pH of 7.0.

Value based on dietary Reference Dose.

Value for Ingestion based on Reference Dose for Mercuric chloride (CAS No. 7487-94-7); value for Inhalation based on

Reference Concentration for elemental Mercury (CAS No. 7439-97-6).

For the ingestion route for arsenic for industrial/commercial, see 742.Appendix A, Table G.

Value based on Reference Dose for Thallium sulfate (CAS No. 7446-18-6).

Calculated values correspond to soil concentrations that should not result in air concentrations that exceed criteria for

workplace air.

(Source: Amended at 25 Ill. Reg. _____, effective _____)

Section 742.APPENDIX B: Tier 1 Tables and Illustrations

Section 742.TABLE E: Tier 1 Groundwater Remediation Objectives for the Groundwater

Component of the Groundwater Ingestion Route

Groundwater Remediation Objective

)fluoranthene 0.00018

0.0009

207-08-9 Benzo(

)fluroanthene 0.00017

111-44-4 Bis(2-chloroethyl)ether

0.01

117-81-7 Bis(2-ethylhexyl)phthalate (Di(2-

ethylhexyl)phthalate)

0.006

0.06

75-27-4 Bromodichloromethane

(Dichlorobromomethane)

Butyl benzyl phthalate

75-15-0 Carbon disulfide

0.7

3.5

56-23-5 Carbon tetrachloride

Groundwater Remediation Objective

108-90-7 Chlorobenzene

(Monochlorobenzene)

0.1

0.5

124-48-1 Chlorodibromomethane

(Dibromochloromethane)

a,h

96-12-8 1,2-Dibromo-3-chloropropane

0.0002

106-93-4 1,2-Dibromoethane

95-50-1 1,2-Dichlorobenzene

106-46-7 1,4-Dichlorobenzene

91-94-1 3,3'-Dichlorobenzidine

0.02

0.1

75-34-3 1,1-Dichloroethane

0.7

3.5

107-06-2 1,2-Dichloroethane

(Ethylene dichloride)

0.005

0.025

75-35-4 1,1-Dichloroethylene

0.007

0.035

156-59-2

cis

-1,2-Dichloroethylene 0.07

0.2

156-60-5

trans

-1,2-Dichloroethylene 0.1

0.5

78-87-5 1,2-Dichloropropane

0.005

0.025

542-75-6 1,3-Dichloropropene

(1,3-Dichloropropylene,

cis

trans

)

0.001

0.005

Groundwater Remediation Objective

84-66-2 Diethyl phthalate

5.6

121-14-2 2,4-Dinitrotoluene

0.00002

606-20-2 2,6-Dinitrotoluene

100-41-4 Ethylbenzene

0.7

1.0

206-44-0 Fluoranthene

1024-57-3 Heptachlor epoxide

0.0002

0.001

118-74-1 Hexachlorobenzene

alpha

alpha

Gamma

77-47-4 Hexachlorocyclopentadiene

0.05

0.5

67-72-1 Hexachloroethane

0.007

0.035

193-39-5 Indeno(1,2,3-

c,d

74-83-9 Methyl bromide

(Bromomethane)

0.0098 0.049

1634-04-4 Methyl tert-butyl etherMethyl tertiary-

butyl ether

0.07 0.07

75-09-2 Methylene chloride

Groundwater Remediation Objective

-Nitrosodiphenylamine 0.0032

87-86-5 Pentachlorophenol

Polychlorinated biphenyls (PCBs)

127-18-4 Tetrachloroethylene

120-82-1 1,2,4-Trichlorobenzene

0.07

0.7

71-55-6 1,1,1-Trichloroethane

0.2

1.0

79-00-5 1,1,2-Trichloroethane

0.005

0.05

79-01-6 Trichloroethylene

0.005

0.025

108-05-4 Vinyl acetate

7.0

75-01-4 Vinyl chloride

0.002

0.01

1330-20-7 Xylenes (total)

10.0

Ionizable Organics

65-85-0 Benzoic Acid

106-47-8 4-Chloroaniline

-Chloroaniline)

0.028 0.028

95-57-8 2-Chlorophenol

0.035

0.175

120-83-2 2,4-Dichlorophenol

0.021

105-67-9 2,4-Dimethylphenol

0.14

51-28-5 2,4-Dinitrophenol

0.014

95-48-7 2-Methylphenol

(

– Cresol)

0.35 0.35

Groundwater Remediation Objective

95-95-4 2,4,5-Trichlorophenol

Inorganics

Chromium, ion, hexavalent

Groundwater Remediation Objective

Chemical Name and Groundwater Remediation Objective Notations

The groundwater remediation objective is equal to the ADL for carcinogens according to the procedures specified in 35 Ill.

Adm. Code 620.

Oral Reference Dose and/or Reference Concentration under review by USEPA. Listed values subject to change.

Value listed is also the Groundwater Quality Standard for this chemical pursuant to 35 Ill. Adm. Code 620.410 for Class I

Groundwater or 35 Ill. Adm. Code 620.420 for Class II Groundwater.

(Source: Amended at 25 Ill. Reg. _____, effective _____)

Section 742.APPENDIX B: Tier 1 Tables and Illustrations

Section 742.TABLE F: Values Used to Calculate the Tier 1 Soil Remediation Objectives for the

Soil Component of the Groundwater Ingestion Route

GWobj Concentration used to Calculate

Tier 1 Soil Remediation Objectives

111-44-4 Bis(2-chloroethyl)ether

8.0E-5

117-81-7 Bis(2-ethylhexyl)phthalate

75-27-4 Bromodichloromethane

(Dichlorobromomethane)

Butyl benzyl phthalate

GWobj Concentration used to Calculate

Tier 1 Soil Remediation Objectives

108-90-7 Chlorobenzene

(Monochlorobenzene)

0.1

0.5

124-48-1 Chlorodibromomethane

(Dibromochloromethane)

a,h

96-12-8 1,2-Dibromo-3-chloropropane

0.0002

106-93-4 1,2-Dibromoethane

95-50-1 1,2-Dichlorobenzene

106-46-7 1,4-Dichlorobenzene

75-34-3 1,1-Dichloroethane

4.0

107-06-2 1,2-Dichloroethane

(Ethylene dichloride)

0.005

0.025

75-35-4 1,1-Dichloroethylene

0.007

0.035

156-59-2

cis

-1,2-Dichloroethylene 0.07

0.2

156-60-5

trans

-1,2-Dichloroethylene 0.1

0.5

78-97-5 1,2-Dichloropropane

0.005

0.025

542-75-6 1,3-Dichloropropene

(1,3-Dichloropropylene,

cis

trans

)

0.0005

0.0025

91-94-1 3,3'-Dichlorobenzidine

GWobj Concentration used to Calculate

Tier 1 Soil Remediation Objectives

121-14-2 2,4-Dinitrotoluene

0.0001

606-20-2 2,6-Dinitrotoluene

100-41-4 Ethylbenzene

0.7

1.0

206-44-0 Fluoranthene

118-74-1 Hexachlorobenzene

alpha

alpha

Gamma

77-47-4 Hexachlorocyclopentadiene

0.05

0.5

67-72-1 Hexachloroethane

0.007

0.035

193-39-5 Indeno(1,2,3-

c,d

tert-butyl etherMethyl tertiary-

GWobj Concentration used to Calculate

Tier 1 Soil Remediation Objectives

Polychlorinated biphenyls (PCBs)

127-18-4 Tetrachloroethylene

120-82-1 1,2,4-Trichlorobenzene

0.07

0.7

71-55-6 1,1,1-Trichloroethane

0.2

1.0

79-00-5 1,1,2-Trichloroethane

0.005

0.05

79-01-6 Trichloroethylene

Ionizable Organics

65-85-0 Benzoic

Acid

100

106-47-8 4-Chloroaniline

-Chloroaniline)

0.1

95-57-8 2-Chlorophenol

0.2

1.0

120-83-2 2,4-Dichlorophenol

0.1

105-67-9 2,4-Dimethylphenol

0.7

51-28-5 2,4-Dinitrophenol

0.04

95-48-7 2-Methylphenol

-Nitrosodiphenylamine 0.02

0.1

GWobj Concentration used to Calculate

Tier 1 Soil Remediation Objectives

87-86-5 Pentachlorophenol

95-95-4 2,4,5-Trichlorophenol

4.0

88-06-2 2,4,6-Trichlorophenol

Inorganics

Chromium, ion, hexavalent

GWobj Concentration used to Calculate

Tier 1 Soil Remediation Objectives

Chemical Name and Groundwater Remediation Objective Notations

The Equation S17 is used to calculate the Soil Remediation Objective for the Soil Component of the Groundwater Ingestion

Route; this equation requires calculation of the Target Soil Leachate Concentration (Cw) from Equation S18: Cw = DF x GWobj.

Value listed is the Water Health Based Limit (HBL) for this chemical from Soil Screening Guidance: User’s Guide,

incorporated by reference at Section 742.210. The HBL is equal to the non-zero MCLG (if available); the MCL (if available);

or, for carcinogens, a cancer risk of 1.0E-6, and for noncarcinogens is equal to a Hazard Quotient of 1.0. NOTE: These GWobj

concentrations are not equal to the Tier 1 Groundwater Remediation Objectives for the Direct Ingestion of Groundwater

Component of the Groundwater Ingestion Route, listed in Section 742.Appendix B, Table E.

Value listed is also the Groundwater Quality Standard for this chemical pursuant to 35 Ill. Adm. Code 620.410 for Class I

Groundwater or 35 Ill. Adm. Code 620.420 for Class II Groundwater.

(Source: Amended at 25 Ill. Reg. _____, effective _____)

Section 742.APPENDIX C: Tier 2 Tables and Illustrations

Section 742.Table E: Default Physical and Chemical Parameters

Bis(2-chloroethyl)ether

Bis(2-ethylhexyl)phthalate

Butyl Benzyl Phthalate

Dibenzo(a,h)anthracene

1,2-Dibromo-3-chloropropane

3,3-Dichlorobenzidine

Cis-1,2-Dichloroethylene

Trans-1,2-Dichloroethylene

1,3-Dichloropropylene

193-39-5 Indeno(1,2,3-c,d)pyrene

tert-butyl etherMethyl

N-Nitrosodiphenylamine

N-Nitrosodi-n-propylamine

Polychlorinated biphenyls (PCBs)

1,2,4-Trichlorobenzene

1,1,1-Trichloroethane

1,1,2-Trichloroethane

2,4,5-Trichlorophenol

2,4,6-Trichlorophenol

Chemical Abstracts Service (CAS) registry number. This number in the format xxx-xx-x, is unique for each chemical and allows efficient searching on computerized data bases.

Soil Remediation objectives are determined pursuant to 40 CFR 761, as incorporated by reference at Section 732.104 (the USEPA "PCB Spill Cleanup Policy"), for most sites;

persons remediating sites should consult with BOL if calculation of Tier 2 soil remediation objectives is desired.

(Source: Amended at 25 Ill. Reg. _____, effective _____)

IT IS SO ORDERED.

I, Dorothy M. Gunn, Clerk of the Illinois Pollution Control Board, certify that the Board

adopted the above opinion and order December 6, 2001, by a vote of 5-0.