Approval and Promulgation of Implementation Plans; Colorado; Correction

EPA is promulgating corrections to the State Implementation Plan (SIP) for the State of Colorado. First, EPA is correcting its January 21, 1997 rulemaking in which EPA approved several Colorado new source review (NSR) SIP revisions. Specifically, pursuant to a December 17, 1996 request from the state of Colorado, EPA is removing from the approved SIP two sections of Colorado's prevention of significant deterioration (PSD) rules in Regulation No. 3. EPA is also disapproving a provision in the State's definition of ``Federally enforceable'' in Regulation No. 3 that EPA inadvertently failed to disapprove in its January 21, 1997 rulemaking. The provision in that definition which is being disapproved states that provisions which are not required by the Federal Clean Air Act (Act) shall not be submitted as part of the SIP and shall not be federally enforceable. This provision is being disapproved because the Act provides that any provision approved by EPA as part of the SIP is federally enforceable unless and until the State requests, and EPA approves, a SIP revision removing such provision. Second, EPA is correcting an October 5, 1979 rulemaking in which EPA incorrectly listed Colorado House Bill 1109 as being approved as part of the Colorado SIP. Last, EPA is correcting a September 23, 1980 rulemaking, in which EPA mistakenly replaced a Colorado SIP approval in 40 CFR 52.320 with a Montana SIP approval. EPA proposed these corrections for public comment on December 17, 1997, and no comments were received within the 30-day public comment period.