Air Plan Limited Approval and Limited Disapproval; California; Eastern Kern Air Pollution Control District
The Environmental Protection Agency (EPA) is finalizing a limited approval and limited disapproval of a revision to the Eastern Kern Air Pollution Control District (EKAPCD or "District") portion of the California State Implementation Plan (SIP). This revision concerns emissions of oxides of nitrogen (NOX) from Portland Cement Kilns. Under the authority of the Clean Air Act (CAA or the Act), this action simultaneously approves a local rule that regulates these emission sources and directs California to correct rule deficiencies. We are finalizing a limited approval of a local rule that regulates these emission sources because the rule would strengthen the current SIP-approved version of EKAPCD's Portland cement kiln rule. We are finalizing a limited disapproval of this revision due to the presence of exemptions for periods of startup, shutdown, and malfunction (breakdown), which are inconsistent with CAA requirements.