Or. Admin. Code § 340-246-0090 - Ambient Benchmark Concentrations for Toxic Air Contaminants

Purpose. Ambient benchmark concentrations are concentrations of toxic air contaminants that serve as goals in the Oregon Toxic Air Contaminants Program. They are based on human health risk and hazard levels considering sensitive populations. Ambient benchmark concentrations are not regulatory standards, but reference values by which toxic air contaminant problems can be identified, addressed and evaluated and are numerically equivalent to the "Toxicity Reference Value" as defined under OAR 340 247-0020. DEQ will use ambient benchmark concentrations as indicated in these rules, to implement the Geographic and Source Category Programs. Ambient benchmark concentrations set by the procedures described in this rule apply throughout Oregon, including that area within the jurisdiction of the Lane Regional Air Protection Agency.

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Or. Admin. Code § 340-246-0090

DEQ 15-2003, f. & cert. ef. 11-3-03; DEQ 12-2006, f. & cert. ef. 8-15-06; DEQ 9-2010, f. & cert. ef. 8-31-10; DEQ 11-2010, f. & dert. ef. 10-19-10; DEQ 151-2018, minor correction filed 04/12/2018, effective 04/12/2018; DEQ 187-2018, amend filed 05/14/2018, effective 5/14/2018; DEQ 197-2018, amend filed 11/16/2018, effective 11/16/2018; DEQ 18-2021, amend filed 11/17/2021, effective 11/17/2021

Statutory/Other Authority: ORS 468.035, 468A.010(1), 468A.015, 468A.135, 468A.025 & 468.020

Statutes/Other Implemented: ORS 468.035, 468A.010(1), 468A.015, 468A.135 & 468A.025