Air Resources Board 

Mary D. Nichols, Chairman 

1001 1 Street P.O. Box 2815 

Linda S. Adams 

Secretaw for 

Sacramento, California 95812 www.arb.ca.gov Arnold Schwarzenegger 

Govemor 

May 28,201 0 

Mr. Jared Blumenfeld 

Regional Administrator 

U.S. Environmental Protection Agency 

Region 9 

75 Hawthorne Street 

San Francisco, California 94105 

Dear Mr. Blumenfeld: 

The Air Resources Board (ARB) requests that the U.S. Environmental Protection 

Agency (U.S. EPA) initiate parallel processing of the attached 2010 PMIO Maintenance 

Plan and Redesignation Request for the Coso Junction Planning Area (Coso Junction). 

Monitored PMIO air quality data from the years 2006-2008 demonstrates that Coso 

Junction attains the 24-hour PMIO standard. In addition, data for 2009 and preliminary 

data for 2010 shows continued attainment of the PMIO standard. The Great Basin 

Unified Air Pollution Control District Board approved the plan at its May 17, 2010 

meeting. ARB will consider approval of the plan at our June 24, 201 0 Board hearing. 

We are requesting that the U.S. EPA begin parallel processing of this plan prior to 

ARB'S hearing. ARB is prepared to expedite its action and the submittal to U.S. EPA. 

If you have any questions, please call Lynn Terry, Deputy Executive Officer, at 

(916) 322-2739! or have your staff contact Karen Magliano, Chief, Air Quality Data 

Branch, at (91 6) 322-71 37. 

w - James N. ~oldstene 

Executive Officer 

Enclosures (4) 

cc: See next page. 

The energy challenge facing California is real. Evew 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:llwww.arb.ca.aov. 

California Environmental Protection Agency 

Printed on Recycled Paper 
Mr. Jared Blumenfeld 

May 28,201 0 

Page 2 

cc: (W/O enclosures) 

Deborah Jordan, Director 

U.S. Environmental Protection Agency 

Air Division - Region 9 

75 Hawthorne Street 

San Francisco, California 941 05 

Mr. Theodore D. Schade 

Air Pollution Control Officer 

Great Basin Unified Air Pollution Control District 

157 Short Street 

Bishop, California 9351 4-3537 

Lynn Terry 

Deputy Executive Officer 

Executive Office 

Karen Magliano, Chief 

Air Quality Data Branch 

Planning and Technical Support Division 
Mr. Jared Blumenfeld 

May 28,201 0 

Page 3 

bcc: Via email (wlout enclosures) 

Ms. Lisa Hanf, Chief 

U.S. Enviror~mental Protection Agency 

Planning Office 

Air Division - Region 9 

75 Hawthorne Street 

San Francisco, California 941 05 

Ms. Sarvy Mahdavi 

U.S. Environmental Protection Agency 

Air Division - Region 9 

75 Hawthorne Street 

San Francisco, California 941 05 

I-inda Murchison, PTSD 

Sylvia Zulawnick, PTSD 

Elizabeth Melgoza, PTSD 

(Hard copies) 

EO (2) PTSD C hron (w1Attachment) 

SIP Library (w1Attachment) 

Assignment # 779011 5752 

X:\SIP Plans\Coso Junction PMIO SIP\request parallel process.doc 
Theodore D. Schade 

Air Pollution Control Officer 

GREAT BASIN UNIFIED AIR POLLUTION CONTROL DISTRICT 

157 Short Street, Bishop, California 93514-3537 

760-872-8211 Fax: 760-872-6109 

NOTICE OF PUBLIC HEARING 

ADOPTION AND APPROVAL OF 201 0 PMlO MAINTENANCE PLAN AND 

REDESIGNATION REQUEST FOR THE COSO JUNCTION PLANNING AREA 

PLEASE TAKE NOTICE that the Governing Board of the Great Basin Unified Air Pollution 

Control District (GBUAPCD) will conduct a public hearing and consider for adoption the 2010 

PMI 0 Maintenance plan and Redesignation Request for the Coso Junction Planning Area (Coso 

PMlO Plan). The public hearing, and the Governing Board's consideration for adoption, will 

occur at the District Governing Board's regular meeting on Monday, May 17, 2010 at 10:OO 

a.m. in the Mono County Supe~isors Chamber, Mono County Courthouse, 2nd Floor, Main 

Street (Highway 399, Bridgeport, California 93517. The public hearing on the Coso PMlO Plan 

is set for 10:15 a.m. The Coso PMlO Plan includes 1) a request to redesignate the area from 

nonattainment for the National Ambient Air Quality Standard for PMlO (federal standard) to 

attainment based on monitoring data and a modeling analysis, and 2) a maintenance plan that 

contains requirements to ensure the federal standard will not be violated in the future. Other 

actions related to the adoption of the Coso PMlO Plan may also be taken at the meeting. 

Members of the public will have an opportunity to submit written comments or make oral 

statements at the public hearing. 

The Coso PMlO Plan is available for public review at the GBUAPCD's Bishop Office, 157 Short 

Street, Bishop, California, 93514, at the GBUAPCD web-site: www.gbuapcd.org, and at Inyo 

County Libraries in Independence, Big Pine, Bishop, Lone Pine, Death Valley and Tecopa, 

California. Copies of the Coso PMlO Plan on CD are free of charge upon request. Hardcopies 

are available at reproduction cost ($25) and free of charge to Inyo, Mono and Alpine County 

residents. Written comments are invited, and should be addressed to Theodore D. Schade, Air 

Pollution Control Officer, Great Basin Unified Air Pollution Control District, 157 Short Street, 

Bishop, CA 935 14. Written comments received by the close of business Wednesday, April 28, 

2010, will be included in the staff report sent to the Governing Board members. Comments may 

also be made during the public hearing. For further information, call the District's Board Clerk, 

Tori DeHaven at (760) 872-821 1. 

lnyo Register: April 1 and April 15,2010 

Mammoth Times: April 2,2010 

Tahoe Daily Tribune: April 2,2010 

Daily Independent: April 1 and April 15,2010