CALIFORNIA Mary D. Nichols, Chair Matthew Rodriquez, CalEPA Secretary

AIR RESOURCES BOARD Edmund G. Brown Jr., Governor

October 25, 2017

Ms. Alexis Strauss Acting Regional Administrator Region 9 U.S. Environmental Protection Agency 75 Hawthorne Street San Francisco, California 94105

Dear Ms. Strauss:

The California Air Resources Board (CARB) is submitting to the U.S. Environmental Protection Agency (U.S. EPA) the Eastern Kern Air Pollution Control District 2017 Ozone Attainment Plan For 2008 Federal 75 ppb 8-Hour Ozone Standard (2017 Plan) prepared by the Eastern Kern Air Pollution Control District (District). The District adopted the 2017 Plan on July 27, 2017 and transmitted it to CARB on August 3, 2017. CARB approved the 2017 Plan on September 28, 2017 as a revision to the California State Implementation Plan (SIP). No comments were received during the CARB hearing.

This package consists of one hard copy, and one compact disc with an exact duplicate of the hard copy materials listed below:

1. August 3, 2017 letter from Mr. Glen E. Stephens, P.E., Air Pollution Control Officer for the Eastern Kern Air Pollution Control District to Mr. Richard Corey, CARB Executive Officer, including the following relevant materials:

a) Certified District Board Resolution 2017-001-07, adopting the 2017 Plan. b) District 2017 Plan with Appendices, adopted by the District Board.

Proof of Public Notice d) Notice of Exemption for the California Environmental Quality Act.

2. Record of the District Public Meeting held on July 27, 2017.

3, Public notice evidence for a CARB public meeting to consider approval of the 2017 Plan.

4. CARB Staff Report, CARB Review of the Eastern Kern Air Pollution Control District 2017 Ozone Attainment Plan for 2008 Federal 75 ppb 8-Hour Ozone Standard (CARB Staff Report).

5. CARB Resolution 17-25 approving the Ozone Plan as a revision to the California SIP

6. CARB Completeness Checklist for SIP Revision.

arb.ca.gov 1001 | Street . P.O. Box 2815 . Sacramento, California 95812 (800) 242-4450

Ms. Alexis Strauss October 25, 2017 Page 2

The 2017 Plan includes on-road motor vehicle emission budgets. To ensure that any future updates to these budgets are used expeditiously in the conformity process, we request that U.S. EPA allow budgets to be replaced upon a finding of adequacy. To accomplish this, we ask U.S. EPA to limit its approval of the budgets submitted to last until the effective date of future U.S. EPA adequacy findings for replacement budgets.

Without the ability to replace the applicable emissions budgets with submitted budgets found adequate using the budget adequacy process, the benefits of using the updated data may not be realized for a year or more after the SIPs are submitted, due to the SIP approval process. We appreciate U.S. EPA's willingness to work with us in our efforts to utilize motor vehicle emission budgets based on the most up-to-date, accurate data as soon as possible upon availability.

CARB is committed to working with U.S. EPA staff to provide any additional clarifying information needed. If you have any questions, please call Mr. Kurt Karperos, Deputy Executive Officer, at (916) 322-2739, or have your staff contact Mr. Jonathan Taylor, Acting Chief, Air Quality Planning and Science Division, at (916) 445-8699.

Sincerely,

now. 9 Richard W. Corey Executive Officer

Enclosures

cc: See next page.

Ms. Alexis Strauss October 25, 2017 Page 3

cc: (w/o enclosures)

Mr. Matt Lakin Acting Director Region 9, Air Division U.S. Environmental Protection Agency 75 Hawthorne Street San Francisco, California 94105

Mr. Glen Stephens, P.E. Air Pollution Control Officer Eastern Kern Air Pollution Control District 2700 "M" Street, Suite 302 Bakersfield, California 93301-2370

Mr. Kurt Karperos Deputy Executive Officer California Air Resource Board

Mr. Jonathan Taylor Acting Chief, Air Quality Planning and Science Division California Air Resources Board