Or. Admin. Code § 340-247-0020 - Definitions

The definitions in OAR 340-200-0020 and 340-245-0020 and this rule apply to this division. If the same term is defined in this division and elsewhere, the definition in this division applies.

(1) "Toxic air contaminant" means an air pollutant that has been determined by the EQC to cause, or reasonably be anticipated to cause, adverse effects to human health and is listed in OAR 340-247-8010 Table 1.

(2) "Toxicity Reference Value" or "TRV" means the following:

(a) For carcinogens, the air concentration corresponding to a one in one million excess cancer risk, calculated by dividing one in one million (0.000001) by the inhalation unit risk specific to that toxic air contaminant as established by the authoritative body that establishes the value, and as approved by the EQC; and

(b) For noncarcinogens, the air concentration above which relevant effects might occur to humans following environmental exposure, and below which it is reasonably expected that effects will not occur.

(c) For the purposes of these rules, DEQ will use the term toxicity reference value when referring to any similarly derived health-based toxicity value developed by other governmental agencies. Examples of names of values that DEQ will refer to as toxicity reference values include, but are not limited to reference concentrations (RfCs), reference exposure levels (RELs), or minimal risk levels (MRLs).

Notes

Or. Admin. Code § 340-247-0020

DEQ 18-2021, adopt filed 11/17/2021, effective 11/17/2021

Statutory/Other Authority: ORS 468.020, ORS 468A.025 & ORS 468A.135

Statutes/Other Implemented: ORS 468A.025