State of California 

Air Resources Board 

BOARD ITEM SUMMARY 

ITEM # 07-1 1-5: Public Hearing to Consider Approval of Modified 

Transportation Conformity Budgets Contained in the 2007 

Air Quality Management Plan for Attaining the Federal 

8-Hour Ozone and PM2.5 Standards in the South Coast 

Air Basin and the 8-hour Federal Ozone Standard in the 

Coachella Valley. 

STAFF RECOMMENDATION: 

Staff recommends that the Board approve the modified transportation conformity 

budgets for the South Coast Air Basin and Coachella Valley, and direct the 

Executive Officer to transmit the modified budgets to the U.S. EPA as revisions 

to the California State lmplementation Plan. 

DISCUSSION: 

At a public meeting held September 27, 2007, the Air Resources Board approved 

the 2007 Air Quality Management Plan (AQMP) for Attaining the Federal 8-hour 

Ozone and PM2.5 Standards in the South Coast Air Basin and the Coachella 

Valley, adopted by the South Coast Air Quality Management District, for 

submittal as a revision to the State lmplementation Plan. The AQMP includes 

transportation conformity budgets. At the same meeting, the Board approved a 

State Strategy for California's 2007 State lmplementation Plan. Differences 

between the approved State Strategy and the state measures assumed in the 

2007 AQMP require minor changes to the transportation conformity budgets. 

SUMMARY AND IMPACTS: 

Approval of the modified transportation conformity budgets will allow the 

Southern California Association of Governments to make transportation 

conformity findings as required by the federal Clean Air Act on transportation 

plans, funding programs and projects. 
Air Resources Board 

Mary D. Nichols, Chairman 

Linda S. Adarns 1001 I Street P.O. Box 281 5 Arnold Schwarzenegger 

Secretary for Sacramento, California 95812 www.arb.ca.gov Governor 

Environmental Protection 

BACKGROUND INFORMATION 

AGENDA ITEM 07-1 1-5, MODIFICATIONS TO TRANSPORTATION CONFORMITY 

BUDGETS FOR SOUTH COAST AIR BASIN AND COACHELLA VALLEY 

At a public meeting held Septerrlber 27, 2007, the Air Resources Board (ARB or Board) 

approved changes to the State Implementation Plan (SIP) for attaining the federal 

8-hour ozone and PM2.5 standards in the South Coast Air Basin and the Coachella 

Valley for submittal as a revision to the California SIP. The revisions consisted of local 

control measures and technical plan elements included in the 2007 Air Quality 

Management Plan (2007 AQIMP) adopted by the South Coast Air Quality Management 

District (District), and the commitments for reductions from State and federal sources as 

identified in the State Strategy for California's 2007 SIP. 

The 2007 AQMP included transportation conformity emissions budgets. These 

emissions budgets are necessary for the Southern California Association of 

Governments (SCAG) to comply with the transportation conformity provisions of the 

federal Clean Air Act. The budgets must be consistent with the assumptions made in 

the adopted SIP. When the District adopted the 2007 AQMP on June I, 2007, it made 

certain assumptions about mobile source controls. Differences between the 

assumptions in the locally adopted 2007 AQMP and the State Strategy that ARB 

subsequently adopted require minor changes to the transportation conformity budgets. 

Agenda Item 07-1 1-5, Modifications to Transportation Conformity Budgets for the So~~th 

Coast Air Basin and Coachella Valley, would replace the transportation conformity 

budgets adopted as part of the 2007 AQMP with budgets that reflect the approved State 

Strategy. The modified transportation conformity budgets could not be considered at 

the September meeting because of federal public notice requirements. The 

transportation conformity budgets the Board will consider on November 15, 2007 (see 

following) were developed in consultation with SCAG and the District. The proposed 

budgets have been noticed and made available to the public. The only changes 

reflected in the proposed budgets are emission reductions associated with the State 

Strategy. 

For any questions concerning the Board item, please contact Mr. Kurt Karperos, Chief 

of the Air Quality and Transportation Planning Branch, at (91 6) 445-561 0. 

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.qov. 

California Environmental Protection Agency 

Prrnted on Recycled Paper 

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