S741.

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY - xI11___

REGION IX t? C> PRCY” 75 Hawthorne Street

San Francisco, CA 94105-3901

MAR 112013

James N. Goldstene. Executive Oflicer

California Air Resources Board

1001 1 Street, P.O. Box 2815

Sacramento, California 95812

Re: Adequacy Fnding for San Diego County Ozone Motor Vehicle Emissions Budgets

Dear Mr.L C stene:

We have found adequate for transportation conformit purjoses the motor vehicle emissions budgets

(MVEBs) in the 1?edesiiiciiion Request and Maintenance Plan Jr the 1997 National Ozone Standard

/n San Diego County (December 2012) (San Diego Plan”) for the 1997 8—hour ozone national ambient

air quality standard (NAAQS). As a result of our adequacy finding, the San Diego Association of

Governments (SAN DAG) and the I.S. Department of Transportation must use these budgets in future

conlormitv analyses.

The San Diego Plan was adopted by the governing board of the San Diego County Air Pollution Control

District (SDCAPCD) on December 5. 2012. The California Air Resources Board (CARB) formally

adopted the San Diego Plan on December 6, 2012, and they submitted it to the U.S. Environmental

Protection Agency on December 28. 2012.

The San Diego Plan identities MVEBs for the San Diego County area for volatile organic compounds

(VOCs) and oxides of nitrogen (NO\) for 2020 and 2025. We announced receipt of the San Diego Plan

on the Internet on December 20. 201 2. and requested public comment by January 22, 201 3. We did not

receive any comments on the budgets and San Diego Plan during the comment period. We will be acting

on the San Diego in a subsequent Federal Register notice.

This letter transmits our decision that the MVEI3s in the San Diego Plan for the San Diego County area

are adequate lor transportation conformity decisions. The adequate budgets arc listed in the following

table.

Motor Vehicle Emissions Budgets for Ozone

S an Di ego County Nonattainment Area

VOC NO.,

Budget Year tons ier average summer day tons per average summer day

2020 23 38

2025 21 30

Pruned on Recycled Paper
In reaching this decision, we have reviewed the San Diego Plan, including responses to public

comments on the plan. and have determined that the related MVEBs. when considered with all other

emissions sources in San Diego County. are consistent with applicable requirements for maintenance o

the 1997 8—hour ozone NAAQS through the year 2025. The budgets also meet the other adequacy

criteria found in 40 CFR 93.1 18(e)(4).

We have enclosed a table that summarizes our adequacy determination. We will soon post this

information on the Internet at: http://www.epa.ov/otag/stateresources/transconf/adeg LIaCY.htm. We will

also announce this adequacy determination in the Federal Redster. This determination will become

effective 15 days after the Federal Redster announcement pursuant to 40 CFR 93.11 8(f). If you have

any questions regarding this decision, please contact Amy Zimpfir at (415) 947—41 46 or John

Ungvarsky at (415) 972-3963.

Sincerely.

Aioi’ctai9

Director. Air Division

Enclosure

cc: Lynn Terry. Deputy Executive Officer, CARB

Robert Kard, Air Pollution Control Officer, SDCAPCD

Gary L. Gallegos, Executive Director, SANDAG

Joseph Vaughn, Federal Highway Administration

Ted Matley. Federal Transit Administration

Mike Brady, CA Department of Transportation
Enclosure

Transportation Conformity Adequacy Review

Control Strategy State Implementation Plan (SIP) Under Review: Date of SIP Revision Receipt by EPA: 1/4/13

RedL’signation Request and Iaintenance Plan,for the 199” National Ozone

Standard/br San Diego CounR (Decenther 2012)

Reviewers: John Ungvarskv Date: 3/613

Transportation Review Criteria Is Criterion Reference in SIP DocumentComments

Sat is fled?

Y/N

Sec. The plan was endorsed by the Y The Decenther 28. 2012 transmittal letter submitting the Redesignation

93.1 1 8(e)(4)(i) Governor (or designee) and was Request and Uauitenanee Plan/br the 1997 National O:one Standard/or

subject to a public hearing. San Diego County (Decem her 2012) (San Diego plan” or “plan”) was

sent by the CARB’s Executive Officer. James Goldstene, the Governor’sdesignee.

On November 2. 2012, the SDCAPCD published in the San Diego

Commerce. a nexspaper of general circulation within the San Diego area.

an announcement that a public hearing would be held on December 5.

2012 to consider and approve the San Diego 8-hour maintenance plan.

Copies of the plan were made available for viewing at the SDCAPCD’soffices and on their web site. 1 On December 5. 2012. the Air PollutionControl Board of San Diego County adopted the San Diego 8-hour

maintenance plan at the publicly noticed public hearing. Following

adoption. SDCAPCD forwarded the plan to CARB, the Governor of

California’s designee for SIP matters, and CARB then submitted the planon December 28. 2012 as a revision to the California SIP to EPA for

approval.

The redesignation request and maintenance plan. titled ‘Redesignation Request and Maintenance Plan for the 1 997 National Ozone Standard for San Diego County.”

may be found at the following SDCAPCD web address: hitp:www.sdapcd.oruplannine!8 Flour O3_Maint-Plan.pdf
The plan was developed through

consultation with federal, state and

local agencies: full implementation

plan documentation was provided

and EPA’s stated concerns, if any,

were addressed.

The plan uses information provided by the SANDAG, SDCAPCD, andCARB. Staff consulted with SAN DAG during plan preparations because

SAN DAG provides vehicle activity data needed for the MVEBs in the

plan development, and the plan sets MVEBs that SAN DAG will have tomeet when approving future transportatioi plans.

The SDCAPCD conducted interagency consultation on the proposed

MVEBs with the San Diego Region Conformity Working Group at itsSeptember 5.2012, meeting pursuant to CFR, Title 40, Part 93. The SanDiego Region Conformity Working Group provides federal interagency

coordination for the transportation/air quality conformity process. TheCWG is comprised of staff representatives from SANDAG. SDCAPCD,Caltrans, the CARB. the U.S. Department of Transportation . and the

U SE PA.

A workshop on San Diego plan was held on September 28. 2012. A

workshop notice was distributed to all e-mail subscribers, local Economic

Development Corporations and Chambers of Commerce. the USEPA,

CARB. and other interested parties.

Sec. 93.1 18(e)(4)(ii) Y

Sec. 93.1 l8(e)(4)(iii) The motor vehicle emission Y Section 5.3 of the San Diego plan. Transportation Con/brinity Budgets.

budget(s) is clearly identified and clearly identifies the MVEBs and the information used, includingprecisely quantified. references, to develop the MVEBs.

Sec. 93.1 l8(e)(4)(iv) The motor vehicle emissions Y EPA has determined that the MVEBs. when considered together with all

budget(s). when considered together other emission sources, are consistent with applicable requirements for

with all other emission sources, is maintenance of the 1997 ozone standard. The MVEBs are consistent withconsistent with applicable inventory estimates used to demonstrate continued maintenance. Therequirements for reasonable further MVEBs include a small safety margin by rounding up to the next wholeprogress. attainment, or maintenance number and adding 2 tons per day.

(whichever is relevant to the given

p lan).
Sec. 93.1 1 8(e)(4)(v) The plan shows a clear relationship

Y Emissions inventory estimates are docuniented in Section 4.0

among the emissions budget(s). .4itain,nent Doe to Pernicinent. Enforceable Enussiuns Reductions. 5. I — control measures and the total -lttainincnt Inuenlori. and Appendix

A

— Projected Emissions Inventories emissions inventory, of the plan. and the control measures are documented in 5.2

—

1llainteiucince Demonstration and Appendix

B

— District, State, and

Federal Emission Control Programs of the plan. The documentation in

these portions of the plan clearly shows the relationship among the

inventories, control measures, and MVEBs. The MVEBs are consistent

with the control measures, inventory estimates, and downward trend in

emissions used to demonstrate continued maintenance.

Sec. 93.1 18(e)(4)(vi) Revisions to previously submitted

Y San Diego’s 2007 8-hour attainment plan included MVEBs of53 and 98 control strategy or maintenance plans tpd for VOC and NO. respectively, for 2008. EPA found the MVEBs in explain and document any changes to the 2007 8-hoLir attainment plan adequate for the purposes of

any previous submitted budgets and transportation conformity. See 73 FR 30098 (May 23, 2008). Emission control measures; impacts on point reductions from fed&al. State. and local measures are reflected in the

and area source emissions: any signiflcantl lower MVEBs for 2020 and 2025 in the San Diego plan. changes to established safety margins Emissions inventory estimates in Section 4.0

— Attainment Due to

(see §93.101 for definition), and Peuinanent, Ei/orceahle Enussions Reductions. 5.1 —Attainment

reasons for the changes (including Inventory, and Appendix

A

— Projected Emissions Inventories and the the basis for any changes to emission control measures in 5.2

— Maintenance Demonstration and Appendix

B

— factors or estimates of VMT. District, State, and Federal Emission Control Programs document the

resulting emission reductions from the attainment strategies developed for

the San Diego area.

Sec. 93.118(e)(5) EPA has reviewed the State’s

Y We have reviewed the comments and responses from SDCAPCD’s compilation of public comments and September28, 2012 workshop. The comments and responses from the

response to comments that are September28. 2012 workshop are summarized in the Workshop Report reqLured to be submitted with any included as attachment

C of SDCAPCD’s submittal package in the implementation plan. State’s SIP submittal. SDCAPCD did not receive any comments or

opposition at their December 5. 2012 public hearing. No comments were

received or opposition expressed at CARB’s December 6, 2012 public

hearing.