EPA approves the state implementation plan (SIP) for the Kalispell, Montana nonattainment area, the Flathead County Air Pollution Program, and a Board Order setting emission limits at nine Kalispell area stationary sources, submitted with letters dated November 25, 1991, January 11, 1994, August 26, 1994 and July 18, 1995, 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<INF>10). The SIP was submitted to satisfy certain federal Clean Air Act requirements for an approvable moderate nonattainment area PM<INF>10 SIP for Kalispell. In addition, EPA also approves the SIP revisions submitted by the State of Montana on August 26, 1994, and July 18, 1995, to satisfy the Federal Clean Air Act requirement to submit contingency measures for the Kalispell and Columbia Falls moderate PM<INF>10 nonattainment areas. The Columbia Falls submittal also incorporates minor revisions to the attainment and maintenance demonstrations for the Columbia Falls moderate PM<INF>10 nonattainment area SIP into the Montana SIP. Since the SIP still adequately demonstrates timely attainment and maintenance of the PM<INF>10 standard, EPA approves these revisions. EPA is also deleting an obsolete section of the Code of Federal Regulations (CFR) which applied to further requirements for the Butte total suspended particulates (TSP) plan.