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 The General Assembly's Illinois Administrative Code database includes only those rulemakings that have been permanently adopted. This menu will point out the Sections on which an emergency rule (valid for a maximum of 150 days, usually until replaced by a permanent rulemaking) exists. The emergency rulemaking is linked through the notation that follows the Section heading in the menu. View Entire Part SUBPART A: INTRODUCTION Section 742.100 Intent and Purpose Section 742.105 Applicability Section 742.110 Overview of Tiered Approach Section 742.115 Key Elements Section 742.120 Site Characterization SUBPART B: GENERAL Section 742.200 Definitions Section 742.205 Severability Section 742.210 Incorporations by Reference Section 742.215 Determination of Soil Attenuation Capacity Section 742.220 Determination of Soil Saturation Limit Section 742.222 Determination of Soil Vapor Saturation Limit Section 742.225 Demonstration of Compliance with Soil and Groundwater Remediation Objectives Section 742.227 Demonstration of Compliance with Soil Gas Remediation Objectives for the Outdoor and Indoor Inhalation Exposure Routes Section 742.230 Agency Review and Approval SUBPART C: EXPOSURE ROUTE EVALUATIONS Section 742.300 Exclusion of Exposure Route Section 742.305 Contaminant Source and Free Product Determination Section 742.310 Outdoor Inhalation Exposure Route Section 742.312 Indoor Inhalation Exposure Route Section 742.315 Soil Ingestion Exposure Route Section 742.320 Groundwater Ingestion Exposure Route SUBPART D: DETERMINING AREA BACKGROUND Section 742.400 Area Background Section 742.405 Determination of Area Background for Soil Section 742.410 Determination of Area Background for Groundwater Section 742.415 Use of Area Background Concentrations SUBPART E: TIER 1 EVALUATION Section 742.500 Tier 1 Evaluation Overview Section 742.505 Tier 1 Soil, Soil Gas and Groundwater Remediation Objectives Section 742.510 Tier 1 Remediation Objectives Tables for the Ingestion, Outdoor Inhalation and Soil Component of the Groundwater Ingestion Exposure Routes Section 742.515 Tier 1 Remediation Objectives Tables for the Indoor Inhalation Exposure Route SUBPART F: TIER 2 GENERAL EVALUATION Section 742.600 Tier 2 Evaluation Overview Section 742.605 Land Use Section 742.610 Chemical and Site Properties SUBPART G: TIER 2 SOIL AND SOIL GAS EVALUATION Section 742.700 Tier 2 Soil and Soil Gas Evaluation Overview Section 742.705 Parameters for Soil Remediation Objective Equations Section 742.710 SSL Soil Equations Section 742.712 SSL Soil Gas Equation for the Outdoor Inhalation Exposure Route Section 742.715 RBCA Soil Equations Section 742.717 J&E Soil Gas Equations for the Indoor Inhalation Exposure Route Section 742.720 Chemicals with Cumulative Noncarcinogenic Effects SUBPART H: TIER 2 GROUNDWATER EVALUATION Section 742.800 Tier 2 Groundwater Evaluation Overview Section 742.805 Tier 2 Groundwater Remediation Objectives Section 742.810 RBCA Calculations to Predict Impacts from Remaining Groundwater Contamination Section 742.812 J&E Groundwater Equations for the Indoor Inhalation Exposure Route SUBPART I: TIER 3 EVALUATION Section 742.900 Tier 3 Evaluation Overview Section 742.905 Modifications of Parameters Section 742.910 Alternative Models Section 742.915 Formal Risk Assessments Section 742.920 Impractical Remediation Section 742.925 Exposure Routes Section 742.930 Derivation of Toxicological Data Section 742.935 Indoor Inhalation Exposure Route SUBPART J: INSTITUTIONAL CONTROLS Section 742.1000 Institutional Controls Section 742.1005 No Further Remediation Letters Section 742.1010 Environmental Land Use Controls Section 742.1012 Federally Owned Property: Land Use Control Memoranda of Agreement Section 742.1015 Ordinances Section 742.1020 Highway Authority Agreements and Highway Authority Agreement Memoranda of Agreement SUBPART K: ENGINEERED BARRIERS Section 742.1100 Engineered Barriers Section 742.1105 Engineered Barrier Requirements SUBPART L: BUILDING CONTROL TECHNOLOGIES Section 742.1200 Building Control Technologies Section 742.1205 Building Control Technology Proposals Section 742.1210 Building Control Technology Requirements Section 742.APPENDIX A General Section 742.TABLE A Soil Saturation Limits (Csat) for Chemicals Whose Melting Point is Less than 30°C Section 742.TABLE B Tolerance Factor (K) Section 742.TABLE C Coefficient {AN-I+1} for W Test of Normality, for N=2(1)50 Section 742.TABLE D Percentage Points of the W Test for n=3(1)50 Section 742.TABLE E Similar-Acting Noncarcinogenic Chemicals Section 742.TABLE F Similar-Acting Carcinogenic Chemicals Section 742.TABLE G Concentrations of Inorganic Chemicals in Background Soils Section 742.TABLE H Concentrations of Polynuclear Aromatic Hydrocarbon Chemicals in Background Soils Section 742.TABLE I Chemicals Whose Tier 1 Class I Groundwater Remediation Objective Exceeds the 1 in 1,000,000 Cancer Risk Concentration Section 742.TABLE J List of TACO Volatile Chemicals for the Indoor Inhalation Section 742.TABLE K Soil Vapor Saturation Limits (Cvsat) for Volatile Chemicals Section 742.APPENDIX B Tier 1 Illustrations and Tables Section 742.ILLUSTRATION A Tier 1 Evaluation Section 742.TABLE A Tier 1 Soil Remediation Objectivesa for Residential Properties Section 742.ILLUSTRATION A Tier 1 Evaluation Section 742.TABLE B Tier 1 Soil Remediation Objectivesa for Industrial/Commercial Properties Section 742.TABLE C pH Specific Soil Remediation Objectives for Inorganics and Ionizing Organics for the Soil Component of the Groundwater Ingestion Route (Class I Groundwater) Section 742.TABLE D pH Specific Soil Remediation Objectives for Inorganics and Ionizing Organics for the Soil Component of the Groundwater Ingestion Route (Class II Groundwater) Section 742.TABLE E Tier 1 Groundwater Remediation Objectives for the Groundwater Component of the Groundwater Ingestion Route Section 742.TABLE F Values Used to Calculate the Tier 1 Soil Remediation Objectives for the Soil Component of the Groundwater Ingestion Route Section 742.TABLE G Tier 1 Soil Gas Remediation Objectives for the Outdoor Inhalation Section 742.TABLE H Tier 1 Soil Gas and Groundwater Remediation Objectives for the Indoor Inhalation Exposure Route – Diffusion and Advectionj Section 742.TABLE I Tier 1 Soil Gas and Groundwater Remediation Objectives for the Indoor Inhalation Exposure Route – Diffusion Onlyj Section 742.APPENDIX C Tier 2 Illustrations and Tables Section 742.TABLE A SSL Equations Section 742.TABLE B SSL Parameters Section 742.TABLE C RBCA Equations Section 742.TABLE D RBCA Parameters Section 742.TABLE E Default Physical and Chemical Parameterse Section 742.TABLE F Methods for Determining Physical Soil Parameters Section 742.TABLE G Error Function (erf) Section 742.TABLE H Q/C Values by Source Area Section 742.TABLE I Koc Values for Ionizing Organics as a Function of pH (cm3/g or L/kg or cm3water/gsoil) Section 742.TABLE J Values to be Substituted for kd or ks when Evaluating Inorganics as a Function of pH (cm3/g or L/kg or cm3water/gsoil) Section 742.TABLE K Parameter Estimates for Calculating Water-Filled Soil Porosity (?w) Section 742.TABLE L J&E Equationsa Section 742.TABLE M J&E Parameters Section 742.APPENDIX D Highway Authority Agreement Section 742.APPENDIX E Highway Authority Agreement Memorandum of Agreement Section 742.APPENDIX F Environmental Land Use Control Section 742.APPENDIX G Model Ordinance Section 742.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; amended in R11-09 at 37 Ill. Reg. 7506, effective July 15, 2013.