CALIFORNIA AIR RESOURCES BOARD 

NOTICE OF PUBLIC MEETING TO CONSIDER APPROVAL OF THE COSO 

JUNCTION PM10 REDESIGNATION REQUEST AND MAINTENANCE PLAN 

The Air Resources Board (ARB or Board) will conduct a public meeting at the time and 

place noted below to consider the approval of the proposed PM10 Redesignation 

Request and Maintenance Plan for the Coso Junction Planning Area that was 

developed and approved by the Great Basin Unified Air Pollution Control District 

(District). If adopted, ARB will submit these elements to the United States 

Environmental Protection Agency (U.S. EPA) for approval as a revision to the California 

State Implementation Plan. 

DATE: June 24, 2010 

TIME: 9:00 a.m. 

PLACE: California Environmental Protection Agency 

Air Resources Board 

Byron Sher Auditorium, Second Floor 

1001 I Street 

Sacramento, California 95814 

This item will be considered at a two-day meeting of the Board, which will commence at 

9:00 a.m., June 24, 2010, and may continue at 8:30 a.m., June 25, 2010. This item is 

scheduled to be heard on the Board’s Consent Calendar. All items on the consent 

calendar will be voted on by the Board immediately after the start of the public meeting. 

Any item may be removed from the consent calendar by a Board member or at the 

request of a Board member or if someone in the audience would like to speak on that 

item. 

BACKGROUND

The federal Clean Air Act establishes planning requirements for those areas that 

exceed the health-based National Ambient Air Quality Standards (standards). Areas are 

designated as nonattainment based on monitored exceedances of air quality standards. 

These nonattainment areas must develop and implement a State Implementation Plan 

(SIP) that demonstrates how they will attain the standards by specified dates. 

The District adopted the first PM10 attainment plan for the Coso Junction Planning Area 

(Coso Junction) in 1991. The Coso Junction attainment demonstration was based on 

controlling dust from Owens Lake. In addition, in a 2004 plan update, the District 

included a dispersion model analysis that indicated that after dust controls were 

implemented at Owens Lake, Coso Junction would be in attainment. 

On May 19, 2010, the U.S. EPA finalized its determination in the Federal Register that 

Coso Junction attained the 24-hour PM10 standard. In this clean data finding, U.S. EPA 
waived certain planning requirements including those for reasonable further progress, 

an attainment demonstration, reasonably available control measures, and contingency 

measures, since these provisions have the sole purpose of helping achieve attainment 

of the standard. 

On May 17, 2010, the District adopted the PM10 Redesignation Request and 

Maintenance Plan (Plan) for Coso Junction. The Plan officially requests that this area 

be redesignated to attainment for the PM10 standard and charts the course for 

continued maintenance of the standard. The adoption of controls on Owens Lake 

resulted in the Coso Junction attaining the 24-hour PM10 standard based on 2007-2009 

PM10 data. 

PROPOSED ACTION

ARB staff has reviewed the District’s Maintenance Plan for Coso Junction and has 

concluded that it meets applicable Clean Air Act requirements. ARB staff has also 

determined that the Maintenance Plan would ensure continued maintenance of the 

standard for the required ten years following redesignation. Staff is recommending that 

the Board approve the Maintenance Plan, as well as the corresponding emissions 

inventory and maintenance demonstration as a revision to the California SIP. In 

addition, ARB staff is recommending that the Board approve the District’s request that 

Coso Junction be redesignated from nonattainment to attainment for the federal PM10 

standard. 

AVAILABILITY OF DOCUMENTS

ARB staff has prepared a written Staff Report. Copies of the Staff Report may be 

obtained from the ARB Public Information Office, 1001 “I” Street, First Floor, 

Environmental Services Center, Sacramento, California 95814, (916) 322-2990. This 

notice, the Staff Report, and the District’s Coso Junction PM10 Maintenance Plan will 

be available from ARB’s website at: 

http://www.arb.ca.gov/planning/sip/sip.htm

SUBMITTAL OF COMMENTS

Interested members of the public may also present comments orally or in writing at the 

meeting, and in writing or by e-mail before the meeting. To be considered by the Board, 

written comment submissions not physically submitted at the meeting must be received 

no later than 12:00 noon, June 23, 2010, and addressed to the following: 

Postal mail: Clerk of the Board, Air Resources Board 

1001 I Street, Sacramento, California 95814 

Electronic submittal: http://www.arb.ca.gov/lispub/comm/bclist.php 

The Board requests, but does not require that 20 copies of any written statement be 

submitted and that written and e-mail statements be filed at least 10 days prior to the 
meeting so that ARB staff and Board members have time to fully consider each 

comment. 

Please note that under the California Public Records Act (Government Code 

section 6250 et seq.), your written and oral comments, attachments, and associated 

contact information (e.g., your address, phone, email, etc.) become part of the public 

record and can be released to the public upon request. Additionally, this information 

may become available via Google, Yahoo, and any other search engines. 

Further inquiries regarding this matter should be directed to Ms. Sylvia Zulawnick, 

Manager of the Particulate Matter Analysis Section, Planning and Technical Support 

Division at (916) 324-7163, or Elizabeth Melgoza, Air Pollution Specialist, Planning and 

Technical Support Division at (916) 322-6161. 

To request a special accommodation or language needs for any of the following: 

• An interpreter to be available at the hearing. 

• Have documents available in an alternate format (i.e. Braille, Large print) or 

another language. 

• A disability-related reasonable accommodation. 

Please contact the Clerk of the Board at (916) 322-5594 or by facsimile at 

(916) 322-3928 as soon as possible, but no later than 10 business days before the 

scheduled Board hearing. TTY/TDD/Speech to Speech users may dial 711 for the 

California Relay Service. 

Para solicitar alguna comodidad especial o necesidad de otro idioma para alguna 

de las siguientes: 

• Un intérprete que esté disponible en la audiencia. 

• Tener documentos disponibles en un formato alterno (por decir, sistema Braille, 

o en impresión grande) u otro idioma. 

• Una acomodación razonable relacionados con una incapacidad. 

Por favor llame a la oficina del Secretario del Consejo de Recursos Atmosféricos al 

(916) 322-5594 o envíe un fax al (916) 322-3928 no menos de diez (10) días laborales 

antes del día programado para la audiencia. Para el Servicio Telefónico de California 

para Personas con Problemas Auditivos, ó de teléfonos TDD pueden marcar al 711. 

CALIFORNIA AIR RESOURCES BOARD 

 /s/ 

______________________________ 

James N. Goldstene 

 Executive Officer 

Date: June 8, 2010