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

Current through Register Vol. 48, No. 28, July 12, 2024
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)
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R1
Remediation Objectives for Non-carcinogenic
								Contaminants (mg/kg)
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R2
Volatilization Factor for Surficial Soils,
								VFss (kg/m3)
Whichever is less between R3 and R4
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R3
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R4
Volatilization Factor for Surfici al Soils
								Regarding Particulates, VFp
								(kg/m3)
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R5
Effective Diffusion Coefficient in Soil Based on
								Vapor-Phase Concentration
								Dseff
								(cm2/s)
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R6
Equations for the ambient vapor inhalation
								(outdoor) route from subsurface soils
Remediation Objectives for Carcinogenic
								Contaminants (mg/kg)
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R7
Remediation Objectives for Non-carcinogenic
								Contaminants (mg/kg)
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R8
Carcinogenic Risk-Based Screening Level for Air,
								RBSLair (µg/m3)
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R9
Noncarcino-genic Risk-Based Screening Level for
								Air, RBSLair
								(µg/m3)
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R10
Volatilization Factor - Subsurface Soil to Ambient
								Air, VFsamb
								(mg/m3)/(mg/kgsoil)
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R11
Equations for the Soil Component of the
								Ground-water Ingestion Exposure Route
Remediation Objective (mg/kg)
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R12
NOTE: This equation can only be used to model
								contaminant migration not in the water bearing unit.
Groundwater at the source,
								GWsource (mg/L)
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R13
Leaching Factor, LFsw
								(mg/Lwater)/
(mg/kgsoil)
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R14
Steady-State Attenuation Along the Centerline of a
								Dissolved Plume,
C(x)/Csource
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R15
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.
Longitudinal Dispersivity,
								ax (cm)
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R16
Transverse Dispersivity, ay
								(cm)
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R17
Vertical Dispersivity, az
								(cm)
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R18
Specific Discharge, U (cm/d)
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R19
Soil-Water Sorption Coefficient,
								ks
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R20
Volumetric Air Content in Vadose Zone Soils,
								qas
								(cm3air/cm3soil)
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R21
Volumetric Water Content in Vadose Zone Soils,
								qws
								(cm3water/cm3soil)
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R22
Total Soil Porosity, qT
								(cm3/cm3soil)
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R23
Groundwater Darcy Velocity,
								Ugw (cm/yr)
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R24
Equations for the Groundwater Ingestion Exposure
								Route
Remediation Objective for Carcinogenic Contaminants
								(mg/L)
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R25
Dissolved Hydrocarbon Concentration along
								Centerline, C(x) (mg/L
								water)
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R26
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.