ORNLERASE - EPA VAPOR INTRUSION SCREENING LEVELS FALL 2024 THQ=1.0

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 1.0. 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.

本数据集包含地下水、土壤气（目标楼板下区域与近源区域）以及室内空气的筛查浓度，旨在协助相关机构工作人员基于有限的初始数据完成蒸汽侵入筛查水平（Vapor Intrusion Screening Levels，缩写VISL）的判定工作。该类浓度值以1E-06的目标癌症风险与1.0的目标危险商值为基准生成。蒸汽侵入筛查水平（VISL）可识别出具备足够挥发性与毒性的化学物质，当地下存在此类污染物时，需针对土壤气侵入路径开展调查工作。