MARYLAND DEPARTMENT OF' THE ENVIRONMENT

MDE i?3:,yri;1Tf:i_ffi1il* ;r?altimore'\/D 2'230

Martin O'Malley

Governor

Anthony G. Brown

Lieutenant Govemor

December 4, 2008

Shari T. Wilson

Secretary

Robert M. Summers, Ph.D.

Deputy Secretary

Ms. Judith M. Katz

Director, Air Protection Division

EPA Region III (3AP00)

1650 Arch Street

Philadelphia, P A 19103-2029

Dear Ms. Katz:

On June 4, 2007 the State of Maryland submitted a SIP revision entitled the Baltimore

Nonattainment Area 8-Hour Ozone State Implementation Plan and Base Year Inventory, dated

June 15, 2007,to EPA requesting its approval as a State Implementation Plan (SIP) pursuant to

Section 110 of the Clean Air Act. The June 4, 2007 submittal consisted ofplans addressing

four elements required by sections 172(c) and 182 of the Clean Air Act as implemented by

Subpart X of 40 CFR Part 5 1 for moderate and above 8-hour ozone nonattainment areas.

These elements ue the 2002 base year emissions inventory, the 15 percent reasonable further

progress plan (RFP plan) for 2008, the attainment demonstration, and the contingency

measrues. The purpose of this letter is to identiff the RFP plan and related elements, including

the 2002 base year emissions inventory ofthe June 15,2007 plan.

The RFP plan provides for emission reductions by 2008 ofat least 15 percent from baseline

emissions required by section 182(b)(1) as implemented by 40 CFR $51.910(aXlXiXA) and

consists ofthe following portions ofthe June 15,2007 plan document:

. The 2002 base year emissions inventory: Section 3.0 and Appendix A;

o The RFP targets: Section 5.0, specifically Section 5.2 ard Appendix C;

o The 2008 uncontrolled & controlled inventories: Section 4.0 excludins Section 4.6.

and Appendix B and Appendix C;

r The 2008 RFP reduction measures &reductions and the RFP demonstration:

Section 5.0, the 2008 emission reduction calculations in Section 6.0, Appendix C

and Appendix D;

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Ms. Judith M. Katz

Page Two

o The enforceable commitrnents/implementation schedules: Section9.0;

o The 2008 RFP mobile conformity budgets: Section 5.0 and Section 8.0 excepthe

paragraph and the table titled "Attainment Year Mobile Budgets" and "2009 Attalunent

Mobile Budgets for the Baltimore Nonattainment Areq" respectively, in Section 8.2,

and Appendix F;

o The contingency measures: Section 10.0; and

o The "general/executive summary/introductory" sections/chapters which ought to be

specified as being treated as part ofthe RFP plan: Sections 1.0 and 2.0.

Also enclosed with our June 4, 2007 letter were administrative and other materials related to the

public notice and hearing among other things. These other materials constitute part ofthe

submittal for each of the SIP revision elements detailed above.

If you have any questions regarding this letter, or require additional information, please contact

Mr. George (Tad) S. Abum, Jr., Director of the Air and Radiation Management Administration at

410-537 -3255, toll-free at 800-633-6101, or via email gabum@mde.state.md.us. He will be

oleased to assist vou.

11._

Secretary

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