OAR 340-202-0225: Prevention of Significant Deterioration Increments: Ambient Air Quality Impact Levels for Maintenance Areas

The following ambient air quality impact levels apply to the areas specified for the purpose of the air quality analysis in OAR 340-224-0060 and 340-224-0260, if required. (1) In a carbon monoxide maintenance area, 0.5 mg/m3 (8 hour average) and 2 mg/m3 (1-hour average). (2) In a PM10 maintenance area: (a) 120 ug/m3 (24-hour average) in the Grants Pass PM10 maintenance area; (b) 140 ug/m3 (24-hour average) in the Klamath Falls PM10 maintenance area; or (c) 140 ug/m3 (24-hour average) in the Lakeview PM10 maintenance area. In addition, a single source impact is limited to an increase of 5 ug/m3 (24-hour average) in the Lakeview PM10 maintenance area. NOTE: This rule is included in the State of Oregon Clean Air Act Implementation Plan that EQC adopted under OAR 340-200-0040.