340-204-0040 Designation of Maintenance Areas The following areas are designated as Maintenance Areas: (1) Carbon Monoxide Maintenance Areas: (a) The Eugene Maintenance Area for carbon monoxide is the Eugene-Springfield AQMA as defined in OAR 340-204-0010; (b) The Portland Maintenance Area for carbon monoxide is the Portland Metropolitan Service District as referenced in OAR 340-204-0010; (c) The Medford Maintenance Area for carbon monoxide is the Medford UGB as defined in OAR 340-204-0010; (d) The Grants Pass Maintenance Area for carbon monoxide is the Grants Pass CBD as defined in OAR 340-204-0010; (e) The Klamath Falls Maintenance Area for carbon monoxide is the Klamath Falls UGB as defined in OAR 340-204-0010; (f) The Salem Maintenance Area for carbon monoxide is the Salem-Keizer Area Transportation Study as defined in OAR 340-204-0010. (2) Ozone Maintenance Areas: (a) The Medford Maintenance Area for ozone is the Medford-Ashland AQMA as defined in OAR 340-204-0010; (b) The Oregon portion of the Portland-Vancouver Interstate Maintenance Area for ozone is the Portland AQMA, as defined in OAR 340-204-0010; (c) The Salem Maintenance Area for ozone is the Salem-Keizer Area Transportation Study as defined in OAR 340-204-0010. (3) PM10 Maintenance Areas: (a) The Grants Pass Maintenance Area for PM10 is the Grants Pass UGB as defined in OAR 340-204-0010; (b) The Klamath Falls Maintenance Area for PM10 is the Klamath Falls UGB as defined in OAR 340-204-0010; (c) The Medford-Ashland Maintenance Area for PM10 is the Medford-Ashland AQMA as defined in OAR 340-204-0010; (d) The La Grande Maintenance Area for PM10 is the La Grande UGB as defined in OAR 340-204-0010; (e) The Lakeview Maintenance Area for PM10 is the Lakeview UGB as defined in OAR 340-204-0010. (f) The Eugene-Springfield Maintenance Area for PM10 is the Eugene-Springfield UGB as defined in OAR 340-204-0010. (g) The Oakridge Maintenance Area for PM10 is the Oakridge UGB as defined in OAR 340-204-0010. (4) PM2.5 Maintenance Areas: (a) The Oakridge Maintenance Area for PM2.5 is defined as a line from Township 21 South, Range 2 East, Section 11 (northwest corner), east to Township 21 South, Range 3 East, Section 11 (northeast corner), south to Township 21 South, Range 3 East, Section 23 (southeast corner), west to Township 21 South, Range 2 East, Section 23 (southwest corner) connecting back to Township 21 South, Range 2 East, Section 11 (northwest corner). (b) The Klamath Falls Maintenance Area for PM2.5 as defined in 340-204-0010, upon maintenance plan approval and redesignation by EPA. [NOTE: This rule is included in the State of Oregon Clean Air Act Implementation Plan that EQC adopted under OAR 340-200-0040.] Statutory/Other Authority: ORS 468.020 & 468A Statutes/Other Implemented: ORS 468A.025 & 468A.035 History: DEQ 6-2024, amend filed 05/24/2024, effective 05/24/2024 DEQ 7-2015, f. & cert. ef. 4-16-15 DEQ 18-2011, f. & cert. ef. 12-21-11 DEQ 4-2007, f. & cert. ef. 6-28-07 DEQ 3-2007, f. & cert. ef. 4-12-07 DEQ 9-2005, f. & cert. ef. 9-9-05 DEQ 1-2005, f. & cert. ef. 1-4-05 DEQ 11-2002, f. & cert. ef. 10-8-02 DEQ 16-2000, f. & cert. ef. 10-25-00 DEQ 15-1999, f. & cert. ef. 10-22-99 DEQ 14-1999, f. & cert. ef. 10-14-99, Renumbered from 340-031-0530 DEQ 1-1999, f. & cert. ef. 1-25-99 DEQ 15-1998, f. & cert. ef. 9-23-98 DEQ 18-1996, f. & cert. ef. 8-19-96 DEQ 14-1995, f. & cert. ef. 5-25-95