Approval and Promulgation of Air Quality Implementation Plans; Virginia; The 2002 Base Year Inventory

Jul 31, 2012 (Environmental Protection Agency Documents and Publications/ContentWorks via COMTEX) -- SUMMARY: EPA is proposing to approve the fine particulate matter (PM2.5) 2002 base year emissions inventory portion of the Virginia State Implementation Plan (SIP) revision submitted by the Commonwealth of Virginia, through the Virginia Department of Environmental Quality (VDEQ), on April 4, 2008. The emissions inventory is part of the Virginia April 4, 2008 SIP revision that was submitted to meet nonattainment requirements related to Virginia's portion of the Washington DC-MD-VA nonattainment area (hereafter referred to as Virginia Area or Area) for the 1997 PM2.5 National Ambient Air Quality Standard (NAAQS) SIP. EPA is proposing to approve the 2002 base year PM2.5 emissions inventory in accordance with the requirements of the Clean Air Act (CAA).

EFFECTIVE DATE: Written comments must be received on or before August 30, 2012.

ADDRESSES: Submit your comments, identified by Docket ID Number EPA-R03-OAR-2010-0151 by one of the following methods: A. www.regulations.gov. Follow the on-line instructions for submitting comments.

B. Email: mastro.donna@epa.gov.

C. Mail: EPA-R03-OAR-2010-0151, Donna Mastro, Acting Associate Director, Office of Air Program Planning, Mailcode 3AP30, U.S. Environmental Protection Agency, Region III, 1650 Arch Street, Philadelphia, Pennsylvania 19103.

D. Hand Delivery: At the previously-listed EPA Region III address. Such deliveries are only accepted during the Docket's normal hours of operation, and special arrangements should be made for deliveries of boxed information.

Instructions: Direct your comments to Docket ID No. EPA-R03-OAR-2010-0151. EPA's policy is that all comments received will be included in the public docket without change, and may be made available online at www.regulations.gov, including any personal information provided, unless the comment includes information claimed to be Confidential Business Information (CBI) or other information whose disclosure is restricted by statute. Do not submit information that you consider to be CBI or otherwise protected through www.regulations.gov or email. The www.regulations.gov Web site is an "anonymous access" system, which means EPA will not know your identity or contact information unless you provide it in the body of your comment. If you send an email comment directly to EPA without going through www.regulations.gov, your email address will be automatically captured and included as part of the comment that is placed in the public docket and made available on the Internet. If you submit an electronic comment, EPA recommends that you include your name and other contact information in the body of your comment and with any disk or CD-ROM you submit. If EPA cannot read your comment due to technical difficulties and cannot contact you for clarification, EPA may not be able to consider your comment. Electronic files should avoid the use of special characters, any form of encryption, and be free of any defects or viruses.

Docket: All documents in the electronic docket are listed in the www.regulations.gov index. Although listed in the index, some information is not publicly available, i.e., CBI or other information whose disclosure is restricted by statute. Certain other material, such as copyrighted material, is not placed on the Internet and will be publicly available only in hard copy form. Publicly available docket materials are available either electronically in www.regulations.gov or in hard copy during normal business hours at the Air Protection Division, U.S. Environmental Protection Agency, Region III, 1650 Arch Street, Philadelphia, Pennsylvania 19103. Copies of the State submittal are available at the Virginia Department of Environmental Quality, 629 East Main Street, Richmond, Virginia 23219.

FOR FURTHER INFORMATION CONTACT: Asrah Khadr, (215) 814-2071, or by email at khadr.asrah@epa.gov.

SUPPLEMENTARY INFORMATION: I. Background II. Summary of SIP Revision III. General Information Pertaining to SIP Submittals From the Commonwealth of Virginia IV. Proposed Action V. Statutory and Executive Order Reviews I. Background Throughout this document, whenever "we," "us," or "our" is used, we mean EPA. On July 18, 1997 (62 FR 38652), EPA established the 1997 PM2..5 NAAQS, including an annual standard of 15.0 [mu]g/m3 based on a 3-year average of annual mean PM2.5 concentrations, and a 24-hour (or daily) standard of 65 [mu]g/m3 based on a 3-year average of the 98th percentile of 24-hour concentrations. EPA established the standards based on significant evidence and numerous health studies demonstrating that serious health effects are associated with exposures to PM2.5.

Following promulgation of a new or revised NAAQS, EPA is required by the CAA to designate areas throughout the United States as attaining or not attaining the NAAQS; this designation process is described in section 107(d)(1) of the CAA. In 1999, EPA and state air-quality agencies initiated the monitoring process for the 1997 PM2.5 NAAQS and, by January 2001, established a complete set of air-quality monitors. On January 5, 2005, EPA promulgated initial air-quality designations for the 1997 PM2.5 NAAQS (70 FR 944), which became effective on April 5, 2005, based on air-quality monitoring data for calendar years 2001-03.

On April 14, 2005, EPA promulgated a supplemental rule amending the agency's initial designations (70 FR 19844), with the same effective date (April 5, 2005) as that which was promulgated at 70 FR 944. As a result of this supplemental rule, PM2.5 nonattainment designations are in effect for 39 areas, comprising 208 counties within 20 states (and the District of Columbia) nationwide, with a combined population of approximately 88 million. The Virginia Area which is the subject of this rulemaking was included in the list of areas not attaining the 1997 PM2.5 NAAQS. The Virginia Area consists of the following cities and counties in Virginia: Arlington County, Alexandria City, Fairfax County, Loudoun County and Prince William County.

On January 12, 2009 (74 FR 1146), EPA determined that Virginia had attained the 1997 PM2.5 NAAQS in the Virginia Area. That determination was based upon quality assured, quality controlled and certified ambient air monitoring data that showed the Area had monitored attainment of the 1997 PM2.5 NAAQS for the 2004-2006 monitoring period and that continued to show attainment of the 1997 PM2.5 NAAQS based on the 2005-2007 data. The January 12, 2009 determination suspended the requirements for Virginia to submit an attainment demonstration, associated reasonably available control measures, a reasonable further progress plan, contingency measures, and other planning SIP revisions related to attainment of the standard for so long as the nonattainment area continues to meet the 1997 PM2.5 NAAQS. On January 23, 2012, VDEQ submitted a request for withdrawal of the Virginia 1997 PM2.5 SIP revisions including the withdrawal of the attainment plan, analysis of reasonably available control measures, attainment demonstration, contingency plans and mobile source budgets. To meet the requirements of CAA section 172(c)(3), Virginia did not request the withdrawal of the 2002 base year emission inventory portion of the 1997 PM2.5 SIP revisions. Section 172(c)(3) of the CAA requires submission and approval of a comprehensive, accurate, and current inventory of actual emissions.

II. Summary of SIP Revision The 2002 base year emission inventory submitted by VDEQ on April 4, 2008 includes emissions estimates that cover the general source categories of point sources, non-road mobile sources, area sources, on-road mobile sources, and biogenic sources. The pollutants that comprise the inventory are nitrogen oxides (NOX), volatile organic compounds (VOCs), PM2.5, coarse particles (PM10), ammonia (NH3), and sulfur dioxide (SO2). EPA has reviewed the results, procedures and methodologies for the base year emissions inventory submitted by VDEQ. The year 2002 was selected by VDEQ as the base year for the emissions inventory per 40 CFR 51.1008(b). A discussion of the emissions inventory development as well as the emissions inventory can be found in Appendix B of the April 3, 2008 SIP submittal.

Table 1 provides a summary of the annual 2002 emissions of NOX, VOCs, PM2.5, PM10, NH3, and SO2 which were included in the Virginia submittal.

.... Table 1--Emissions of Pollutants in Tons per Year .... [TPY] Pollutant........ NO<X>.. VOCs......PM<2.5> PM<10>..NH<3>.. SO<2> Emissions (TPY).. 75,909.63 92,724.76 8,277.43..29,997.85 2,370.78..49,974.50 The CAA section 172(c)(3) emissions inventory is developed by the incorporation of data from multiple sources. States were required to develop and submit to EPA a triennial emissions inventory according to the Consolidated Emissions Reporting Rule (CERR) for all source categories (i.e., point, area, nonroad mobile and on-road mobile). The 2002 emissions inventory was based on data developed by VDEQ and the Metropolitan Washington Council of Government (MWCOG). The data were developed according to current EPA emissions inventory guidance "Emissions Inventory Guidance for Implementation of Ozone and Particulate Matter NAAQS and Regional Haze Regulations," August 2005. EPA preliminarily agrees that the process used to develop this emissions inventory is adequate to meet the requirements of CAA section 172(c)(3), the implementing regulations, and EPA guidance for emission inventories. More information regarding the review of the base year inventory can be found in the technical support document (TSD) titled "2002 SIP Base Year Inventory" that is located in this docket.

III. General Information Pertaining to SIP Submittals From the Commonwealth of Virginia --This is a summary of a Federal Register article originally published on the page number listed below-- Proposed rule.

CFR Part: "40 CFR Part 52" Citation: "77 FR 45304" Document Number: "EPA-R03-OAR-2010-0151; FRL-9706-1" Federal Register Page Number: "45304" "Proposed Rules"

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