Equations
for the Soil Component of the Ground-water Ingestion Exposure Route
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Remediation
Objective (mg/kg)
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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)
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R13
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Leaching
Factor, LFsw (mg/Lwater)/
(mg/kgsoil)
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R14
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Steady-State
Attenuation Along the Centerline of a Dissolved Plume,
C(x)/Csource
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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 (λ) is not readily available, then set
λ = 0.
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Longitudinal
Dispersivity, ax (cm)
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R16
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Transverse
Dispersivity, ay (cm)
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R17
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Vertical
Dispersivity, az (cm)
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R18
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Specific
Discharge, U (cm/d)
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R19
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Soil-Water
Sorption Coefficient, ks
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R20
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Volumetric
Air Content in Vadose Zone Soils, qas (cm3air/cm3soil)
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R21
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Volumetric
Water Content in Vadose Zone Soils, qws (cm3water/cm3 soil)
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R22
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Total
Soil Porosity, qT (cm3/cm3soil)
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R23
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Groundwater
Darcy Velocity, Ugw (cm/yr)
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R24
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Equations for the Groundwater Ingestion Exposure
Route
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Remediation
Objective for Carcinogenic Contaminants (mg/L)
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R25
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Dissolved
Hydrocarbon Concentration along Centerline, C(x) (mg/L water)
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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 (λ) is not readily available, then set
λ = 0.
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