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page title goes here Risk Assessment

Radon Vapor Intrusion Screening Levels (RVISL) Calculator

Select Screening Level Type

Select Target UMTRCA WL Standard

Select Exposure Scenario

Predict indoor air concentrations and WL from measured media concentrations

Select Site Info Type

Select Units

Groundwater Temperature (° C)

Attenuation Factor Sub-Slab (unitless)

For sub-slab soil gas, the recommended generic attenuation factor (αss) is 0.03.

Attenuation Factor Groundwater (unitless)

For groundwater, the recommended generic attenuation factor (αgw) is 0.001.

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