ORNLERASE - EPA VAPOR INTRUSION SCREENING LEVELS FALL 2024 THQ=0.1

This dataset contains screening level concentrations for groundwater, soil gas ( target sub-slab and near source), and indoor air to assist Agency staff with making a vapor intrusion screening levels (VISL) determination based on limited, initial data. These values are generated with a target cancer risk of 1E-06 and a target hazard quotient of 0.1. The VISLs identify chemicals that are considered to be sufficiently volatile and toxic to warrant an investigation of the soil gas intrusion pathway when they are present as subsurface contaminants.