Linda S. Adams

Secretary for
Environmental Protection

The energy challenge facing California is real. Ev ery Californian needs to take immediate action to r educe energy consumption. For a list of simple ways you can reduce demand and cut your energy costs, see our website: http://www.arb.ca.gov

. California Environmental Protection Agency

Printed on Recycled Paper 

# Air Resources Board

Mary D. Nichols, Chairman

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

February 1, 2008

Mr. Wayne Nastri Regional Administrator Region 9 U.S. Environmental Protection Agency
75 Hawthorne Street San Francisco, California 94105

Dear Mr. Nastri:

I am writing to provide the U.S. Environmental Prot ection Agency (U.S. EPA) with additional technical information supporting the rea sonable further progress (RFP) demonstrations for the South Coast and the San Joaq uin Valley ozone State Implementations Plans (SIP). ARB submitted the Sou th Coast and the San Joaquin Valley SIPs, including RFP demonstrations, on Novem ber 20, 2007 and November 28, 2007 respectively.

The additional information relates to the calculate d benefits of the pre-1990 federal motor vehicle program in both RFP demonstrations. Under federal law, states cannot take credit for the benefits of the pre-1990 federa l motor vehicle toward meeting RFP requirements. For the San Joaquin Valley, we also included vehicle activity data consistent with the SIP and transportation conformi ty budgets submitted in November but inadvertently left out of the RFP calculation.

Over the years, various methods have been used to e stimate the benefits of the pre1990 federal motor vehicle program. California use d one approach in the SIPs
submitted in November 2007. In the attached calcul ations, ARB used another method now preferred by U.S. EPA. By our accounting, the latest U.S. EPA method underestimates the progress that results from Calif ornia’s motor vehicle controls by overestimating the residual benefits of the pre-199 0 federal motor vehicle program. Nevertheless, both the RFP calculations in the Nove mber submittals and the information provided here show the required progres s.Mr. Wayne Nastri

February 1, 2008 Page 2

We look forward to working with U.S. EPA to secure approval of California’s ozone SIPs. If you have any questions, please feel free to contact me, at (916) 445-4383, or Ms. Lynn Terry, Deputy Executive Officer, at (916) 322-2739.

Sincerely,

/s/

James N. Goldstene
Executive Officer

Enclosures

cc: See next page.Mr. Wayne Nastri

February 1, 2008 Page 3

cc: Dr. Deborah Jordan, Director Air Division, Region 9 U.S. Environmental Protection Agency
75 Hawthorne Street San Francisco, California 94105

Mr. Hasan Ikhrata
Executive Director
Southern California Association of Governments 818 W. Seventh Street, 12 th Floor Los Angeles, California 90017

Dr. Barry Wallerstein
Executive Officer South Coast Air Quality Management District 21865 Copley Drive Diamond Bar, California 91765

Mr. Seyed Sadredin
Executive Director/Air Pollution Control Officer San Joaquin Valley Air Pollution Control District 1990 East Gettysburg Avenue Fresno, California 93726

Ms. Barbara Goodwin
Executive Director Council of Fresno County Governments 2035 Tulare Street, Suite 201 Fresno, California 93721

Mr. Ronald Brummett
Executive Director
Kern Council of Governments

1401 19 th Street, Suite 300 Bakersfield, California 93301

Ms. Terri King
Executive Director Kings County Association of Governments 339 West “D” Street, Suite B Lemoore, California 93245Mr. Wayne Nastri

February 1, 2008 Page 4

Ms. Patricia Taylor
Executive Director Madera County Transportation Commission 1816 Howard Road, Suite 8 Madera, California 93637

Mr. Jesse Brown
Executive Director Merced County Association of Governments
369 West 18 th Street Merced, California 95340

Mr. Andrew Chesley
Executive Director San Joaquin Council of Governments
555 East Weber Avenue Stockton, California 95202

Mr. Vince Harris, Director
Stanislaus Council of Governments 900 H Street, Suite D Modesto, California 95354

Mr. George Finney Executive Secretary Tulare County Association of Governments 5961 South Mooney Boulevard Visalia, California 93277

Ms. Lynn Terry Deputy Executive Officer
Air Resources Board