Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 742 - TIERED APPROACH TO CORRECTIVE ACTION OBJECTIVES
Subpart L - BUILDING CONTROL TECHNOLOGIES
Appendix C - Tier 2 Illustrations and Tables
Table C - RBCA Equations
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Equations for the combined exposures routes of soil ingestion inhalation of vapors and particulates, and dermal contact with soil |
Remediation Objectives for Carcinogenic Contaminants (mg/kg) |
R1 |
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Remediation Objectives for Non-carcinogenic Contaminants (mg/kg) |
R2 |
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Volatilization Factor for Surficial Soils, VFss (kg/m3) Whichever is less between R3 and R4 |
R3 |
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R4 |
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Volatilization Factor for Surfici al Soils Regarding Particulates, VFp (kg/m3) |
R5 |
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Effective Diffusion Coefficient in Soil Based on Vapor-Phase Concentration Dseff (cm2/s) |
R6 |
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Equations for the ambient vapor inhalation (outdoor) route from subsurface soils |
Remediation Objectives for Carcinogenic Contaminants (mg/kg) |
R7 |
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Remediation Objectives for Non-carcinogenic Contaminants (mg/kg) |
R8 |
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Carcinogenic Risk-Based Screening Level for Air, RBSLair (µg/m3) |
R9 |
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Noncarcino-genic Risk-Based Screening Level for Air, RBSLair (µg/m3) |
R10 |
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Volatilization Factor - Subsurface Soil to Ambient Air, VFsamb (mg/m3)/(mg/kgsoil) |
R11 |
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Equations for the Soil Component of the Ground-water Ingestion Exposure Route |
Remediation Objective (mg/kg) |
R12 |
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NOTE: This equation can only be used to model contaminant migration not in the water bearing unit. |
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Groundwater at the source, GWsource (mg/L) |
R13 |
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Leaching Factor, LFsw (mg/Lwater)/ (mg/kgsoil) |
R14 |
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Steady-State Attenuation Along the Centerline of a Dissolved Plume, C(x)/Csource |
R15 |
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NOTE: 1. This equation does not predict the contaminant flow within bedrock and may not accurately predict downgradient concentrations in the presence of a confining layer. 2. If the value of the First Order Degradation Constant ([LAMBDA]) is not readily available, then set [LAMBDA] = 0. |
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Longitudinal Dispersivity, ax (cm) |
R16 |
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Transverse Dispersivity, ay (cm) |
R17 |
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Vertical Dispersivity, az (cm) |
R18 |
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Specific Discharge, U (cm/d) |
R19 |
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Soil-Water Sorption Coefficient, ks |
R20 |
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Volumetric Air Content in Vadose Zone Soils, qas (cm3air/cm3soil) |
R21 |
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Volumetric Water Content in Vadose Zone Soils, qws (cm3water/cm3soil) |
R22 |
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Total Soil Porosity, qT (cm3/cm3soil) |
R23 |
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Groundwater Darcy Velocity, Ugw (cm/yr) |
R24 |
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Equations for the Groundwater Ingestion Exposure Route |
Remediation Objective for Carcinogenic Contaminants (mg/L) |
R25 |
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Dissolved Hydrocarbon Concentration along Centerline, C(x) (mg/L water) |
R26 |
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NOTE: 1. This equation does not predict the containment flow within bedrock and may not accurately predict downgradient concentrations in the presence of a confining layer. 2. If the value of the First Order Degradation Constant ([LAMBDA]) is not readily available, then set [LAMBDA] = 0. |
