Approval and Promulgation of Implementation Plans; Designation of Areas for Air Quality Planning Purposes; State of California; PM-10; Redesignation of the Coso Junction Planning Area to Attainment; Approval of PM-10 Maintenance Plan for the Coso Junction Planning Area

요약

EPA is approving the State of California's request to redesignate the Coso Junction planning area (CJPA) to attainment for the particulate matter of ten microns or less (PM-10) national ambient air quality standard (NAAQS). EPA is also approving the PM-10 emissions inventory and the maintenance plan for the CJPA, including control measures for Owens Lake, the primary cause of PM-10 nonattainment in the CJPA. Finally, EPA is finding the contribution of motor vehicles to the area's PM-10 problem insignificant; consequently, the State will not have to complete a regional emissions analysis for PM-10 in any future transportation conformity determination for the CJPA.