State Implementation Plan Revision:

Section 11O(a)(2)(K) for Fine Particulates

April 2008

JUN 112000

EPA. REGION III

OFFICE OF REGIONAL ADMINISTRjVI’(JR

Bureau of Air Quality

Pennsylvania Department of Environmental Protection

P.O. Box 8468

Harrisburg, PA 17105-8468

717-787-9495

www.depweb.state.pa.us

Kathleen A. McGinty Edward G. Rendell

Secretary Governor
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and/or maintain the primary and secondary National Ambient Air Quality Standards (NAAQS).

The SIP is a complex, fluid document containing regulations, source-specific requirements, nonregulatory items such as plans and inventories, and in some cases additional requirements

promulgated by the U.S. Environmental Protection Agency (EPA). The initial SIPs for states

were approved by EPA on May 31, 1972. SIPs can be revised by the state with EPA approval asnecessary. The federally enforceable SIP for Pennsylvania is compiled in 40 CFR Part 52,

Subpart NN.

On December 7, 2007, the Commonwealth of Pennsylvania submitted a SIP revision to EPA

which addressed those requirements of Section 1 10(a)(2)(A)-(M) ofthe Clean Air Act (CAA)that have not been addressed in other SIP revisions, describing how the Commonwealth ofPennsylvania will demonstrate how the eight-hour ozone and fine particulate (PM2.5)NAAQS

are being implemented, maintained and enforced. A public comment period was held on the

December 7, 2007 SIP submittal from September 15, 2007 through September 16, 2007.This SIP revision is a supplement to the December 7, 2007 submittal and describes how the

Commonwealth will fulfill the following requirements under the Clean Air Act (CAA) set forth

below for the fine particulate (PM2.5)NAAQS:

Section 1 10(a)(2). Each implementation plan submitted by a State under this chapter

[CAA] shall be adopted by the State after reasonable notice andpublic hearing. Each such

plan shall

* * * * *

(K) providefor-

(i) the performance ofsuch air quality modeling as the Administrator [ofEPA] may

prescribe for the purpose ofpredicting the effect on ambient air quality ofany emissions of

any air pollutantfor which the Administrator has established a national ambient air quality

standard, and

(ii) the submission, upon request, ofdata related to such air quality modeling to the

Administrator;

On December 17, 2004, EPA published its air quality designations and classifications for the

PM25 NAAQS. These designations became effective on April 5, 2005. Areas designated as

nonattainment in Pennsylvania for PM2.5are: Harrisburg-Lebanon-Carlisle; Johnstown;

Lancaster; York; Reading; and the five counties of the Philadelphia-Wilmington PA-NJ-DE area.

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Environmental Protection (Department) to conduct or cause to be conducted studies and research

with respect to air contaminants, their nature, causes and effects, and with respect to the control,

prevention, abatement and reduction of air pollution and air contamination. 35 P.S. § 4004 (15).

This power and duty include the power and duty to perform air quality modeling and data

submissions prescribed by the Administrator of EPA under Section 1 10(a)(2)(K) ofthe CAA.

Inherent in Pennsylvania’s obligation to meet the NAAQS and to conduct or cause to beconducted studies and research is the authority and obligation for the Department to perform

modeling as required under the CAA to demonstrate attainment of the NAAQS. Pennsylvania

will continue to perform modeling as required under the CAA to demonstrate attainment.Pennsylvania will continue to submit the air quality modeling data as part of its relevant SIP

submissions and through federal grant commitments or in other ways that EPA may request.

Pennsylvania, as a member of the Mid-Atlantic Regional Air Management Association

(MARAMA), conducts multi-pollutant regional modeling through the efforts of a cooperative

regional consortium. This consortium most recently performed regional modeling utilizing theresources and expertise of MARAMA, the Northeast States for Coordinated Air Use

Management (NESCAUM), and the states of New York, Virginia, New Jersey and Maryland to

conduct regional air quality simulations for calendar years 2002, 2009 and 2018 for ozone, fine

particles and regional haze. This work was undertaken via a multi-pollutant regional modelingplatform in order to meet requirements for ozone, particulate matter and regional haze modeling.

The regional modeling platform utilized meteorological fields developed by the University ofMaryland, emissions information developed by MARAMA, emissions modeling performed by

New York and NESCAUM, and chemical transport modeling performed by modeling centers inNew York, NESCAUM, New Jersey, Maryland, and Virginia. Pennsylvania and other

participating states provided emissions inventory information to MARAMA and providedtechnical and policy oversight and direction for the modeling centers through the OzoneTransport Commission Modeling Committee and the Mid-Atlantic/Northeast Visibility Union

(MANE-VU) Technical Support Committee.

The procedures followed in the modeling analysis for the 1997 PM2.5attainment demonstrationswill be in accordance with EPA’s Guidance on the Use ofModels and Other Analysesfor

Demonstrating Attainment ofAir Quality Goalsfor Ozone, PM25 and Regional Haze (EPA

454/B-07-002, April 2007). The Department submitted a modeling protocol for thesenonattainment areas in October 2007.

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