Clean Air Act Approval and Promulgation of PMINF10 Implementation Plan for Montana

الملخص

In this action, EPA approves the State implementation plan (SIP) submitted by the State of Montana to achieve attainment of the National ambient air quality standards (NAAQS) for particulate matter with an aerodynamic diameter less than or equal to a nominal 10 micrometers (PM 10). The SIP was submitted by Montana to satisfy certain Federal requirements for an approvable moderate nonattainment area PM 10 SIP for Missoula. In this final rule, EPA also approves the Missoula City-County Air Pollution Control Program, except several rules regarding emergency procedures, permitting, open burning, wood- waste burners, new source performance standards, hazardous air pollutant standards, and variances. EPA will propose separate action on these rules when the State fulfills its related commitments. One commitment has been fulfilled (see the This Action section of this document for more information). If the State fails to fulfill the remainder of its commitments, EPA will take appropriate action. Further, EPA is declining to take action on Missoula's odor provisions.