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Overview Of NAAQS in Pennsylvania. Air Quality Technical Advisory Committee (AQTAC) January 18, 2008 Tim Leon Guerrero. Overview Of NAAQS in Pennsylvania. PM 2.5 Nonattainment Area Recommendations Status of Ozone Attainment Demonstration and Redesignations Proposed Lead Standard Changes.

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overview of naaqs in pennsylvania
Overview Of NAAQS in Pennsylvania

Air Quality Technical Advisory Committee

(AQTAC)

January 18, 2008

Tim Leon Guerrero

overview of naaqs in pennsylvania2
Overview Of NAAQS in Pennsylvania
  • PM2.5 Nonattainment Area Recommendations
  • Status of Ozone Attainment Demonstration and Redesignations
  • Proposed Lead Standard Changes
pm2 5 national ambient air quality standards
PM2.5 National Ambient Air Quality Standards
  • PM2.5 NAAQS promulgated by EPA in 1997.
    • Annual standard – 15 ug/m3
    • Twenty-four hour standard – 65 ug/m3
  • EPA designated 17 counties and 4 partial counties in PA as nonattainment areas for the annual PM2.5 standard; effective on April 5, 2005.
  • Attainment demonstrations are due to EPA in April 2008.
    • Awaiting modeling results from regional modeling using the Ozone Transport Commission platform.
    • Most areas of the Commonwealth expected to attain the annual standard by the April 2010 attainment date.
      • The Allegheny County Health Department will develop the attainment demonstration for the Liberty-Clairton PM2.5 nonattainment area.
  • States must attain the annual standard by April 2010.
pm 2 5 national ambient air quality standards
PM2.5 National Ambient Air Quality Standards
  • On October 17, 2006—EPA lowered the 24-hour PM2.5 standard to 35 μg/m.3
  • December 28, 2007— The Commonwealth submitted designation recommendations to EPA.
  • August 20, 2008 —EPA’s responds to states’ designation recommendations.
  • December 18, 2008 —EPA issues final 24-hour PM2.5 designations.
pm2 5 nonattainment area recommendations
PM2.5 Nonattainment Area Recommendations
  • The Department tried to maintain consistency between the current annual PM2.5 nonattainment areas and its recommendations for the 24-hour PM2.5 standard.
  • Most of the current annual nonattainment areas do not meet the revised 24-hour standard; two additional areas meet the annual but not the revised 24-hr standard (State College, Allentown-Bethlehem-Easton).
  • A total of 20 counties and 3 partial counties do not attain the revised 24-hour PM2.5 standard (44 counties attain and parts of 3 counties attain).
  • Recommendation package available on the Department’s website:

http://www.dep.state.pa.us/dep/deputate/airwaste/aq/attain/recommendations.htm

eight hour ozone update
Eight-Hour Ozone Update
  • In 2004, the U.S. EPA designated 37 counties in Pennsylvania eight-hour ozone nonattainment areas
    • Current standard: 0.08 ppm
  • All areas in PA are monitoring attainment except the 5-county Philadelphia Area (Bucks, Chester, Delaware, Montgomery and Philadelphia Counties) and the Pittsburgh-Beaver Valley Area.
eight hour ozone update cont d
Eight-Hour Ozone Update (Cont’d)
  • Redesignation Requests and Maintenance Plans approved by EPA for the following areas:
    • Berks, Blair, Cambria, Erie and Franklin, Lancaster, Mercer and Tioga Counties.
    • Harrisburg, Scranton/Wilkes-Barre, State College, York/Adams
  • Approvals proposed by EPA for the following:
    • Pittsburgh-Beaver Valley
      • Violations occurred during 2007 ozone season; awaiting EPA guidance.
    • Allentown-Bethlehem-Easton (Lehigh, Northampton, Carbon)

,

eight hour ozone update cont d11
Eight-Hour Ozone Update (Cont’d)
  • To date, no action by EPA on the following redesignation requests:
    • Greene County
    • Indiana/Clearfield Counties
philadelphia area eight hour ozone attainment demonstration
Philadelphia Area Eight-Hour Ozone Attainment Demonstration
  • The Philadelphia “Moderate” Eight-hour ozone nonattainment area includes:
    • Bucks, Chester, Delaware, Montgomery and Philadelphia Counties
    • Portions of Delaware, New Jersey, and Cecil County, Maryland.
  • Attainment demonstrations prepared by agencies in DE, MD, NJ and PA are currently under review by EPA.
  • The attainment demonstration includes a “weight-of-evidence” demonstration which is designed to show that the Philadelphia Interstate nonattainment area will attain the 8-hour ozone NAAQS by June 2010.
philadelphia eight hour ozone attainment demonstration
Philadelphia Eight-Hour Ozone Attainment Demonstration
  • The modeled attainment date is June 2009 for “moderate” ozone nonattainment areas.
  • Based on current ambient air quality data for 2005-2007, the Philadelphia area, has one of the highest design values, 92, in the country.
    • The 2007 ozone season data is currently being quality assured.
  • In November 2007, EPA raised issues regarding the attainment demonstrations.
    • Recommended weight-of-evidence demonstration enhancements with additional analyses and emission reduction strategies
    • Proposed a voluntary “bump-up” option
    • Identified the need for reduced ambient ozone concentrations within the next two years.
eight hour ozone maintenance plans
Eight-Hour Ozone Maintenance Plans
  • EPA’s Phase 1 Implementation Rule for the eight-hour ozone standard requires that states submit an eight-hour maintenance plan to EPA for those one-hour nonattainment areas that had not been previously redesignated to attainment/maintenance for the one-hour standard.
  • Maintenance plans for attainment areas (Columbia, Northumberland, Snyder, Crawford, Lawrence, Warren, Pike, Schuylkill, Susquehanna, Wayne, Juniata, Somerset) were submitted in December 2007.
epa s proposed primary eight hour ozone naaqs
EPA’s Proposed Primary Eight-Hour Ozone NAAQS
  • As required by the Clean Air Act, EPA proposed new primary and secondary eight-hour NAAQS in July 2007.
  • EPA also requested comments on alternative standards within a range from 0.060 ppm up to the level of the current 8-hour ozone standard, which is 0.08 ppm.
  • If EPA adopts a standard of 0.070 ppm, all of the existing DEP monitors show nonattainment.
  • EPA must issue the revised NAAQS in March 2008.
epa s proposed secondary ozone naaqs
EPA’s Proposed Secondary Ozone NAAQS
  • In July 2007, EPA also proposed two options for the “secondary” ozone NAAQS to improve protection for plants, trees and crops during the growing season.
  • One option would establish a new cumulative standard that would add daily ozone concentrations across a three-month period. EPA proposed to set the level of the cumulative standard within the range of 7 to 21 ppm-hours.
  • Alternatively, the secondary standard would be identical to the proposed primary 8-hour standard.
  • EPA must also issue the revised NAAQS in March 2008.
proposed lead standard changes
Proposed Lead Standard Changes
  • The U.S. EPA published an Advance Notice of Proposed Rulemaking for Lead NAAQS in December 2007:

http://www.epa.gov/ttn/naaqs/standards/pb/s_pb_cr_fr.html

  • EPA will propose whether to revise or retain the current lead standards no later than May 1, 2008, with a target date of March 2008, and take final action by September 1, 2008, pursuant to a court order.
  • Additional monitoring may be needed as part of EPA’s proposal.