8Hour Ozone NAAQS Implementation Proposed Rule

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8-Hour Ozone NAAQS ImplementationProposed Rule

• Erik Snyder
• U.S. EPA Region 6

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Topics

• Schedule
• Options for Subpart 1 v. 2
• Transition 1-hr to 8-hr NAAQS
• Anti-backsliding
• Conformity

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Schedule
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Subpart 1 v. Subpart 2

• Option 1All Subpart 2
• Classify based on 8-hour design values
• Option 2Based on 1-hour standard
• Areas meeting standard -- Subpart 1
• Areas exceeding standard -- Subpart 2

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Attainment Years
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Revoking the 1-Hour Standard

• Option 1
• 1 year after EPA designates 8-hour areas.
• Option 2
• 1 year after EPA designates areas
• Revoke only some purposes
• Leave rest in place for anti-backsliding

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Anti-Backsliding Proposal

• Measure stay in place
• Option 1 until an area achieves the level of
  1-hour standard or
• Option 2 until an area attains the 8-hour
  standard.
• Other provisions in SIP would remain but could be
  revised

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Conformity Transition1-Hr to 8-Hr

• One-year grace period for 8-hour after
  designations
• Transition option 1
• 1-hour standard revoked no conformity
• Transition option 2
• 1-hour standard revoked for limited purposes
  (including conformity) no conformity
• Results Avoids conformity for 2 standards

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Additional Conformity Rules

• No changes in 8-hour implementation package
• Transportation conformity rulemaking
• Establish specific conformity tests for the
  8-hour standard.
• Complete rulemaking prior to area designations
• General conformity rulemaking
• Separate action
• Complete by April 2005

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Proposal will also address

• Attainment dates
• Mandatory controls
• Other ozone transport issues
• New source review
• Modeling attainment demonstrations
• Reasonable further progress requirements
• Reasonably available control measures/technology
• Optimizing controls for ozone and PM
• Tribal issues
• Early reduction programs

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Next Steps

• Proposed rule
• Signed on May 14, 2003
• Publication within next week or two
• RO conference shortly
• 3 public hearings in June
• Publish final rule December 2003
• Designate nonattainment attainment areas in
  April 2004

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www.epa.gov/ttn/naaqs/ozone/o3imp8hr
www.epa.gov/airlinks/ozoneproposedrule.pdf
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Questions?
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(No Transcript)
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8-Hr O3 Designations Schedule
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Classifications of N/A Areas

• Based upon implementation rule
• Published with Designations
• Or ASAP thereafter
• By operation of law
• Incentive for lower classification

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N/A Area Classifications
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Incentive Feature

• Allow lower classifications by demonstrating
  attainment of the lower classification date
• Example, if Memphis, a moderate area modeled
  attainment by 2007, it could be marginal and have
  fewer requirements

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Designation Issues

• Shrinking from CMSAs
• Splitting of N/A areas
• Handling of interstate N/A areas
• Transport from upwind attainment areas
• Politics of N/A
• How to deal with tribal designations

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Update 8-Hour Early Action Compacts

• Program Lead
• David Cole 919-541-5565

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EAC Areas Ozone
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Schedule
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Recent Developments Issues

• OAQPS guidance on EAC milestones
• April 4, 2003 Lydia Wegman memo
• guidelines for completing the June 16th submittal
  June 2003 progress report
• Concern about modeling other technical issues
• use of 1999 or later inventories
• current episodes

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Recent Developments Issues

• OAQPS Regional modelers are providing technical
  assistance to EAC areas
• Conformity in 1-hr maintenance areas
• 1-hr standard continues to apply to these areas
  until 1 yr after the effective date of the 8-hr
  designation, or until April 2009

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Summary

• 8-Hr implementation rule
• Proposed in May
• Option for subpart 1 v. 2
• Option 1 all subpart 2
• Option 2 split based on 1-hr values
• Designations
• Calls and work shops
• Need help with the A.Q. data
• EAC
• Guidance for June submittal