Approval and Promulgation of Implementation Plans; California State Implementation Plan Revision; Kern County Air Pollution Control District; San Diego County Air Pollution Control District; Ventura County Air Pollution Control District

EPA is taking direct final action to approve revisions to the California State Implementation Plan (SIP). The revisions concern rules from the Kern County Air Pollution Control District (KCAPCD), the San Diego County Air Pollution Control District (SDCAPCD), and the Ventura County Air Pollution Control District (VCAPCD). This approval action will incorporate five rules into the federally approved SIP. The intended effect of approving these rules is to regulate emissions of oxides of nitrogen (NO<INF>x) in accordance with the requirements of the Clean Air Act, as amended in 1990 (CAA or the Act). The rules control NO<INF>x emissions from boilers, steam generators, process heaters, electric utility boilers, internal combustion engines, and stationary gas turbines. The EPA is finalizing the approval of these revisions into the California SIP under provisions of the CAA regarding EPA action on SIP submittals, SIPs for national primary and secondary ambient air quality standards and plan requirements for nonttainment areas.