Approval and Promulgation of Air Quality State Implementation Plans; California; Ambient Ozone Monitoring Requirements

The Environmental Protection Agency (EPA) is proposing to approve a portion of a state implementation plan (SIP) submission from the State of California regarding Clean Air Act (CAA or ``Act'') requirements for ambient ozone monitoring in the Bakersfield Metropolitan Statistical Area (MSA) for the 1997 ozone and 2008 ozone national ambient air quality standards (NAAQS or ``standards''). The SIP submission is intended to revise a portion of the State's ``infrastructure'' SIP that, more broadly, provides for implementation, maintenance, and enforcement of the standards. We are taking comments on this proposal and plan to follow with a final action.