OAR 340-245-0320: Standards and Criteria for Noncancer Risk Action Levels for Existing Contamination Sources

(1) The noncancer Risk Action Levels for existing sources are identified in OAR 340-245-8010, Table 1. (2) The toxic air contaminants for which an adjusted noncancer Risk Action Level will apply are identified in OAR 340-247-8010, Table 2, and OAR 340-245-8010, Table 2 in the column named “Noncancer TBACT RAL.” (3) An adjusted Risk Action Level will be applied to existing sources that emit one or more toxic air contaminants identified in OAR 340-247-8010, Table 2, or OAR 340-245-8010, Table 2 with a noncancer TBACT RAL of a Hazard Index of 3. For sources that emit a mixture of toxic air contaminants with noncancer TBACT Risk Action Levels of both a Hazard Index of 3 and a Hazard Index of 5, the Risk Determination Ratio calculation expresses the degree to which the applicable Risk Action Level may be adjusted for each source.