Linda

### s. Adams Secretaryfor EnvironmentalProtection

December 21, 2010
Mr. Jared Blumenfeld Regional Administrator 

# Air Resources Board Mary D. Nichols, Chairman

1001 I Street • P.O. Box 2815 Sacramento, California 95812 • www.arb.ca.gov

U.S. Environmental Protection Agency Region 9 75 Hawthorne Street San Francisco, California 94105 Dear Mr. Blumenfeld: Arnold Schwarzenegger Governor

The Air Resources Board (ARB) hereby submits the Imperial County 2009 1997 8-Hour Ozone Modified Air Quality Management Plan (2009 Ozone Plan) and the 2009 ReasonablyAvailable Control Technology State Implementation Plan (2009 RACT SIP) to the United States Environmental Protection Agency (U.S. EPA) as revisions to California's State Implementation Plan (SIP). On December 3, 2009, U.S. EPA promulgated a clean data finding for Imperial County,

. indicating thatthe County's air quality now complies with the 1997 8-hour ozone national ambient air quality standard. This action suspended certain Clean AirAct (CAA) requirements that Imperial Countywould have had to address as a moderate ozone nonattainment area. On July 13, 2010, the Imperial CountyAir Pollution Control Board adopted the 2009 Ozone Planand 2009 RACT SIP to fulfill CAA requirements that were not suspended by

. the clean data finding and to fulfill RACT requirements for moderate nonattainment

areas. ARB approved both plans on November 18, 2010. This package consists offive copies ofthe materials identified below. I) A July 2010, letterfrom Mr. Brad Poiriez, Air Pollution Control Officer, to Mr. James N. Goldstene, ARB Executive Officer, transmitting: • 2009 Ozone Plan. • 2009 RACT SIP.
The energychallenge facing California is real. Every Californian needs to take immediate action to reduce energyconsumption. Fora listofsimple waysyou can reduce demandandcutyourenergycosts, see ourwebsite: http:/fwww.arb.ca.gov. California Environmental Protection Agency Printedon RecycledPaperMr. Jared Blumenfeld December 21, 2010 Page2

• Imperial County Staff Reportforthe 2009 Ozone Plan and 2009 RACT SIP. • Minute Order (Board Approval). • Official affidavit ofpublication ofthe Hearing Notice forthe Imperial County 2009 Ozone Plan and RACT SIP, both dated June 13, 2010. II) Public meeting noticefortheARB November 18, 2010 public meeting to consider approval ofthe Imperial County 2009 1997- 8-Hour Ozone Modified Air Quality Management Plan and 2009 RACT SIP. Ill) ARB staff reportforthe Imperial County 2009 Ozone Plan and 2009 RACT SIP. IV) ARB Resolution 10-35 adopting the Imperial County 2009 Ozone Plan and 2009 RACT SIP.

. V) SIP Completeness Checklists for 2009 Ozone Plan and 2009 RACT SIP. Ifyou have any questions, please contact Ms. Lynn Terry, Deputy Executive Officer, at (916) 322-2739, or have your staff contact Mr. Douglas Ito, Chief, Air Quality and Transportation Planning Branch, at (916) 322-0285. Sincerely,

Enclosures
cc: See next page.Mr. Jared Blumenfeld December21 , 2010 Page 3

cc: (w/o enclosures) Ms. Deborah Jordan, Director U.S. Environmental Protection Agency Air Division-Region 9 75 Hawthorne Street San Francisco, California 94105 Mr. Brad Poiriez Imperial CountyAir Pollution Control District 150 South Ninth Street El Centro, California 92243 Ms. Lynn Terry Deputy Executive Officer Mr. Doug Ito, Chief AirQuality and Transportation Planning Branch