When are 8-hour SIPs due, and when will motor vehicle emissions budgets become available?
Areas have three years to submit attainment SIPs, until 2007. However, areas can make early SIP submissions; areas don’t have to wait until 2007 to submit attainment SIPs. In addition, they can also submit an early SIP that may not show attainment, but that shows progress towards attainment and contains budgets. For more information, see Section V.A.1. of the July 1, 2004 rulemaking (69 FR 40019), which is available at http://www.epa.gov/fedrgstr/EPA-AIR/2004/July/Day-01/a14213.htm. Q6: Does an 18-month clock for a 1-hour ozone SIP budget continue to apply for 8-hour conformity after the 1-hour ozone standard is revoked? Does an EPA adequacy finding or approval of a 1-hour ozone SIP budget after revocation trigger a new 18-month clock for 8-hour conformity? A: No, for both questions. Section 93.104(e) of the transportation conformity rule only applies for 8-hour conformity when 8-hour ozone SIP budgets are found adequate or approved. More specifically: any 1-hour ozone-related 18-month
