Matthew Rodriquez 

Secretary for 

Environmental Protection 

October 8, 2014 

Mr. Matt Lakin, Chief 

Planning, Region 9 

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 

75 Hawthorne Street 

San Francisco, California 94105 

Dear Mr. Lakin: 

Edmund G. Brown Jr. 

Governor 

On September 22, 2014, the Air Resources Board (ARB) submitted a letter providing 

supporting information for paved road dust emissions for the San Joaquin Valley 2012 

PM2.5 Plan (Plan) to the U.S. Environmental Protection Agency (U.S. EPA). 

Enclosure 1 contained a typographical error in the "Updated Calculation, Total Direct 

PM2.5" column. The corrected table is below. 

Year 

Table 1. San Joaquin Valley Winter PM2.5 Emissions 

2012 PM2.5 Plan vs. Updated Calculation 

Projected Emissions (tpd) 

2012 PM2.5 Plan Updated Calculation 

Paved Road Total Direct Paved Road Total Direct 

Dust PM2.5 Dust PM2.5 

2014 4.5 64.4 4.5 64.4 

2017 4.5 63.5 4.7 63.7 

2019 4.5 64.0 4.8 64.3 

If you have any further questions, please call me at (916) 445-8699, or by email at 

jtaylor@arb.ca.gov. 

nathan P. Taylor, Chief 

Transportation Planning Branch 

cc: See next page. 

The energy challenge facing California is real. Every Californian needs to take immediate action to reduce 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 
Mr. Matt Lakin, Chief 

October 8, 2014 

Page 2 

cc: Mr. Tony Boren 

Executive Director 

Council of Fresno County Governments 

2035 Tulare Street, Suite 201 

Fresno, California 93721 

Mr. Andrew Chesley 

Executive Director 

San Joaquin Council of Governments 

555 East Weber Avenue 

Stockton, California 95202 

Mr. Sheraz Gill 

Supervising Air Quality Specialist 

San Joaquin Valley Air Pollution Control District 

1990 East Gettysburg Avenue 

Fresno, California 93726 

Mr. Ahron Hakimi 

Executive Director 

Kern Council of Governments 

1401 19th Street, Suite 300 

Bakersfield, California 93301 

Ms. Terri King 

Executive Director 

Kings County Association of Governments 

339 West "D" Street, Suite B 

Lemoore, California 93245 

Ms. Marjie Kirn 

Executive Director 

Merced County Association of Governments 

369 West 18th Street 

Merced, California 95340 

Mr. Seyed Sadredin 

Executive Director/Air Pollution Control Officer 

San Joaquin Valley Air Pollution Control District 

1990 East Gettysburg Avenue 

Fresno, California 93726 

Continued next page. 
Mr. Matt Lakin, Chief 

October 8, 2014 

Page 3 

(continued) 

Mr. Ted Smalley 

Executive Director 

Tulare County Association of Governments 

21 0 North Church Street, Suite B 

Visalia, California 93291 

Ms. Patricia Taylor 

Executive Director 

Madera County Transportation Commission 

2001 Howard Road, Suite 201 

Madera, California 93637 

Ms. Tanisha Taylor 

Senior Regional Planner 

San Joaquin Council of Governments 

555 East Weber Avenue 

Stockton, California 95202 

Mr. Carlos Yamzon 

Executive Director 

Stanislaus Council of Governments 

1111 I Street, Suite 308 

Modesto, California 95354 

Ms. Sylvia Vanderspek 

Chief, Air Quality Planning Branch 

Air Quality Planning and Science Division