Ill. Admin. Code tit. 35, pt. 742, subpt. L, app C, tbl. C

Current through Register Vol. 48, No. 49, December 6, 2024

Table C - RBCA Equations

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)	Click here to view image	R1
	Remediation Objectives for Non-carcinogenic Contaminants (mg/kg)	Click here to view image	R2
	Volatilization Factor for Surficial Soils, VFss (kg/m3) Whichever is less between R3 and R4	Click here to view image	R3
		Click here to view image	R4
	Volatilization Factor for Surfici al Soils Regarding Particulates, VFp (kg/m3)	Click here to view image	R5
	Effective Diffusion Coefficient in Soil Based on Vapor-Phase Concentration Dseff (cm2/s)	Click here to view image	R6

Equations for the ambient vapor inhalation (outdoor) route from subsurface soils	Remediation Objectives for Carcinogenic Contaminants (mg/kg)	Click here to view image	R7
	Remediation Objectives for Non-carcinogenic Contaminants (mg/kg)	Click here to view image	R8
	Carcinogenic Risk-Based Screening Level for Air, RBSLair (µg/m3)	Click here to view image	R9
	Noncarcino-genic Risk-Based Screening Level for Air, RBSLair (µg/m3)	Click here to view image	R10
	Volatilization Factor - Subsurface Soil to Ambient Air, VFsamb (mg/m3)/(mg/kgsoil)	Click here to view image	R11

Equations for the Soil Component of the Ground-water Ingestion Exposure Route	Remediation Objective (mg/kg)	Click here to view image	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)	Click here to view image	R13
	Leaching Factor, LFsw (mg/Lwater)/ (mg/kgsoil)	Click here to view image	R14
	Steady-State Attenuation Along the Centerline of a Dissolved Plume, C(x)/Csource	Click here to view image	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)	Click here to view image	R16
	Transverse Dispersivity, ay (cm)	Click here to view image	R17
	Vertical Dispersivity, az (cm)	Click here to view image	R18
	Specific Discharge, U (cm/d)	Click here to view image	R19
	Soil-Water Sorption Coefficient, ks	Click here to view image	R20
	Volumetric Air Content in Vadose Zone Soils, qas (cm3air/cm3soil)	Click here to view image	R21
	Volumetric Water Content in Vadose Zone Soils, qws (cm3water/cm3soil)	Click here to view image	R22
	Total Soil Porosity, qT (cm3/cm3soil)	Click here to view image	R23
	Groundwater Darcy Velocity, Ugw (cm/yr)	Click here to view image	R24
Equations for the Groundwater Ingestion Exposure Route	Remediation Objective for Carcinogenic Contaminants (mg/L)	Click here to view image	R25
	Dissolved Hydrocarbon Concentration along Centerline, C(x) (mg/L water)	Click here to view image	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.

Ill. Admin. Code tit. 35, pt. 742, subpt. L, app C, tbl. C

Amended at 31 Ill. Reg. 4063, effective February 23, 2007