The 2009 Sacramento Regional 8-Hour Ozone Attainment and Reasonable Further Progress Plan and subsequent revisions (2011, 2013) demonstrate that the Sacramento region meets federal Clean Air Act (CAA) planning requirements for the NAAQS for 8-hour ozone established in 1997. Since the adoption of the Plan in early 2009 and its revision in 2011, there were significant updates to emissions calculation methods, vehicle traveled activity data, and growth assumptions used to develop the Plan. In addition, the United States Environmental Protection Agency released new guidelines for the interpretation of Clean Air Act (CAA) §182(d)(1)(A) related to the Vehicle Miles Traveled (VMT) Offset.
The 2013 Plan revision shows that the region continues to meet federal progress requirements and demonstrates that the Sacramento Region will meet the 1997 NAAQS by 2018. The revised Plan updates the emissions inventory, provides a review of photochemical modeling results based on changes in the emissions inventories, updates the reasonable further progress and attainment demonstrations, revises adoption dates for control measures, and establishes new motor vehicle emissions budgets for transportation conformity purposes. The Plan also includes a VMT Offset demonstration that showed the emissions reduction from transportation control measures and strategies are sufficient to offset the emissions increase due to VMT growth.
The revised Plan was approved by the California Air Resources Board (CARB) on 11/21/2013 and submitted to the United States Environmental Protection Agency (EPA) as a revision to the State Implementation Plan on 12/31/2013.
EPA has found adequate for the motor vehicle emissions budgets (MVEBs) in the Plan for the 1997 8-hour ozone NAAQS. The finding will be effective on August 25, 2014.
|Agency||Action||Status and documents|
|Transportation Conformity Budget Adequacy||Effective 08-25-2014. US EPA determined the motor vehicle emission budgets for 2014, 2017, and 2018 to be adequate.
Adequacy letter from EPA to CARB (PDF) 07-25-2014
Notice of Adequacy. Federal Register Vol. 79 No. 153 (PDF) 08-08-2014
|VMT Offset Demonstration Document||SFNA VMT Offset Document (PDF) 07-24-2014|
|Transmittal Letter to EPA||Plan Submittal Letter to EPA (PDF) 12-31-2013|
|Transmittal Letter||Letter to CARB (PDF) 11-20-2013|
|Revised Plan with Appendices||
Clean Version (PDF Portfolio) 09-26-2013
Strikeout Version (PDF Portfolio) 09-26-2013
Board Memorandum (PDF) 10-24-2013
Notices of Exemption (PDF) 10-24-2013