# Air Resources Board Mary D. Nichols, Chairman

1001 1 Street P.O. Box 2815 Linda S. Adams Sacramento, California 95812 www.arb.ca.gov Arnold Schwarzenegger

Secretaryfor Governor Environmental Protection

July 22, 2008 Mr. Wayne Nastri Regional Administrator U.S. Enviror~mental Protection Agency Region 9 75 Hawthorne Street San Francisco, California 94105 Dear Mr. Nastri: The Air Resources Board (ARB) hereby subrr~its to the U.S. Environmental Protection Agency (U.S. EPA) the Western Mojave Desert 8-Hour Ozone Attainment Plan (Plan) as a revisionto California's State Implementation Plan (SIP). The Plan sets out a strategy for attaining the federal $-hour ozone standard inthe Western Mojave Desert Ozone Nonattainment Area. The Western Mojave Desert Ozone Nonattainment Area consists of the Antelope Valley portion of Los Angeles County and the southwestern portion of San Bernardino County. 'The Antelope Valley Air Quality Management District (AVAQMD) has jurisdiction over the Los Angeles County portion of the Western Mojave Desert. The Mojave Desert Air Quality Management District (MDAQMD) has jurisdiction over the San Bernardino County portion of the Western Mojave Desert. The AVAQMD and MDAQMD have each adopted an attainment demonstration planfor their respective jurisdictions. The plans include identical transportation conformity budgets and Reasonable Further Progress (RFP) plans covering the entire Western Mojave Desert nonattainment area. The AVAQMD adopted its plan on May 20, 2008, while the MDAQMD adopted its'plan on June 9,2008. ARB approved the Western Mojave Desert Plan on June 26,2008. The Plan addresses allfederal plarlning requirements, demonstrates attainment of the 8-hour standard by 2021, demonstrates Reasonable Further Progress, and includes transportation conformity budgets. This package consists of five copies of the materials identified below. I) A June 17, 2008, letter from Mr. Alan J. De Salvio, SupervisingAir Quality Engineer, transmitting:

The energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption. For a list ofsimple ways you can reduce demand and cut your energy costs, see our website: http:llwww.arb.ca.ac~v. California Environmental Protection Agency Printed on Recycled PaperMr.Wayne Nastri July 22, 2008 Page 2
The MDAQMD Federal 8-Hour Ozone Attainment Plan with the following documents:


### o Resolution of the MDAQMD Board approving and adopting the Western Mojave Desert 8-Hour Ozone Attainment Plan.


### o Certified Minute Item.
o The Notice of Exerr~ption (for Riverside and San Bernardino Counties).
o The official affidavits of publication of the Hearing Notice for the MDAQMD Federal 8-Hour OzoneAttainment Plan, dated April 25, 2008. II) A June 

### 17, 2008, letter from Mr.Alan J. De Salvio, Supervising Air Quality Engineer, transmitting: The AVAQMD Federal 8-Hour Ozone Attainment Plan with thefollowing documents:
o Resolution of the AVAQMD Board approving and adopting the Western Mojave Desert 8-Hour Ozone Attainment Plan.


### o Certified Minute Item.


### o The Notice of Exemption (for Los Angeles County).
o The official affidavit of publication of the Hearirlg Notice for the AVAQMD Federal 8-Hour Ozone Attainment Plan, dated April 20, 2008. Ill) ARB staff report, Analysis of the Western Moiave Desert andVentura County 8-Hour Ozone Attainment Plans, dated June 

### 13,2008. IV) ARB Public Meeting Notice for theARB June 26, 2008 Public Meetiny to Consider Approval of the Western Mojave Desert 8-Hour Ozone Attainment Plan. V) ARB Resolution 08-26 adopting the Western Mojave Desert 8-Hour Ozone Attainment Plan. VI) A SIP Completeness Checklist.

### Mr.Wayne Nastri July 22, 2008 

### Page 3
If you have any questions, please call Ms. Lynn Terry, Deputy Executive Officer, at (916) 322-2739, or have your staff contact Mr. Kurt Karperos, Chief, Air Quality and Transportation Planning Branch, at (91 6) 

### 322-0285. Sincerely, 

# my, (pa +w James N. Goldst e Executive Officer 

# f

Enclosures 

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cc: (W/O enclosures) Ms. Debbie Jordan, Director U.S. Environmental Protection Agency Air Division-Region 9 75 Hawthorne Street San Francisco, California 94105 Mr. Eldon Heaston Executive Officer Mojave Desert Air Quality Management District 14306 Park Avenue Victorville, California 92392 Mr. Eldon Heaston Executive Officer Antelope Valley Air Quality Management District 43301 Division Street, Suite 206 Lancaster, California 93535 Ms. Lynn Terry Deputy Executive Officer Mr. Kurt Karperos Planning and Technical Support Division