.STAT OF CALIFORNIA PETE WILSON, Governor

AIR RESOURCES BOARD

2020 L STREET

P.O. BOX 2815

SACRAMENTO, CA 95812

January 7, 1993

Mr. Daniel W. McGovern

Regional Administrator RECEIVED

Environmental Protection Agency

ii 13 1993

75 Hawthorne Street AIr&TxcDMsion San Francisco, California 94105 U.S.EIA,Hegion9

Attention: Mr. David P. Howekamp

Dear Mr. McGovern:

Clarification of Previous SIP Submittal for the South Coast

California

California is required to submit to your agency a revision to the State Implementation Plan (SIP) that includes a ridesharirig program under Section 182(d)(1)(B). In addition, the state must submit Transportation Control Measures (TCMs) to offset any growth in emissions from Vehicle Miles Traveled (VMT) or numbers of vehicle trips under Section 182(d)(1)(A). These requirements apply to areas with a “severe” or

Quality

“extreme”

Management

classification. This submittal addresses the South Coast Air District (AQMD/District).

Regulation XV

On November 12, 1992, Mr. James M. Lents, Executive Officer of the South Coast AQMD transmitted a letter to the Air Resources Board (ARB) outlining the actions taken by the District to meet the federal

District’s

requirements. These actions include the submission of Regulation XV, the

on February

ridesharing program, to the Environmental Protection Agency (EPA) 7, 1989. This was deemed complete by EPA on May 5, 1989. An

deemed

amendment to Regulation XV was also submitted to EPA on April 5, 1991, and

am

to constitute a complete SIP submittal in May of 1991. Therefore, I

previous

requesting that the U.S. EPA accept Regulation XV, based upon these two submittals, as the ridesharing program for the South Coast.

Your Agency has requested supplemental SIP submittals, information to the 1989 and 1991

commute specifically a baseline Average Vehicle Occupancy (AVO) of

supplied

trips for 1991. EPA staff has agreed that this information may be

information

after the November 15, 1992 deadline, and that provision of this

the federal

after that date would not cause a finding of non—compliance with

submit

requirements and would not trigger sanctions. The District will

will forward

this information to the ARB by March of 1993. Upon approval, ARB this information to EPA.

)
t

Mr. Daniel McGovern —2—

Offsetting Growth in VMT and Vehicle Trips

In addition to the ridesharing requirement, Section 182(d)(1)(A) requires states to submit revisions to their SIPs that identify and adopt

specific TCMs to offset any growth in emissions caused by VMT or numbers of

vehicle trips in areas designated as “severe” or “extreme” for ozone. We believe offsetting TCMs are not necessary in the South Coast District for the following reason: motor vehicle emissions are projected to continuously

We

decrease throughout the planning period in the District (see attachment 1). expect this trend to continue for the foreseeable future. However, to ensure that is the case, we will revisit the issue in the 1994 SIP

submittal.

This clarification should fulfill the requirements for a ridesharing

program. If you have any questions or would like to discuss this SIP

submittal, please contact Ms. Anne Geraghty, Manager of the Transportation Strategies Group, at (916) 322—2745 or Ms. Elizabeth Miller, at (916) 445—6243.

Sincerely,

Ja es D. Boy

E cutive Officer

Attachment

cc: Mr. David P. Howekamp, EPA

Mr. Wally Woo, EPA

Mr. Jerry Wamsley, EPA

Mr. James M. Lents, SCAQMD
C

TABLE 2-2

Baseline and Controlled Emissions (tons/day) in the South Coast Air Basin for the August 1987 and June 1987

Episodes.

-Hr.,)

U’

NOx ROG CO

Scenario Mobile Other Total Mobile Other Total Mobile Other Total

1994 Baseline 530.3 532.6 1062.9 420.4 687.1 1107.5 3825.1 736.7 4561.8

1997 Baseline 496.4 505.1 1001.5 357.4 684.8 1042.2 3308.8 771.6 4080.4

2000 Baseline 485.8 504.9 990.7 317.2 691.7 1008.9 2884.0 790.0 3674.0

2010 Baseline 551.8 542.9 1094.7 342.0 724.8 1066.8 2554.4 886.5 3440.9

1994 Controlled 490.5 493.4 983.9 337.7 582.0 919.7 2769.4 722.8 3492.2

1997 Controlled 397.1 386.3 783.4 242.2 529.1 771.3 2062.4 719.3 2781.7

2000 Controlled 345.0 304.2 649.2 197.6 278.4 476.0 1787.4 645.9 2433.3

2010 Controlled 219.8 178.5 398.3 74.5 112.6 187.1 1012.2 596.8 1609.0

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