An Update on the Colorado Regional Haze SIP Process and Outcomes

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An Update on the Colorado Regional Haze SIP
Process and Outcomes
Presented at WRAP Implementation Work
Group San Francisco, CA March 2005
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Purpose

• Present an overview of SIP development process in
  Colorado with special attention to whats next
  
• source category attribution analysis
• 2. strategy assessment and,
• 3. demonstrating Reasonable Progress

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Major Topic Areas

• Background
• Summary of current activities/issues
• Overview of likely technical approach Using
  Attribution of Haze and 2018 modeling
• Questions and discussion

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SIP Requirements

• Section 308
• Establish reasonable progress goals for each area
  (2018) considering
• Cost, time, energy/non air impacts, remaining
  useful life of affected sources
• Apportionment
• Identify areas each jurisdiction may affect
• Identify jurisdictions share of emission
  reduction obligations
• Control measures
• Must achieve the jurisdictions obligation
• Must include BART or superior alternative

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Regional Haze Background

• Staff involvement with WRAP
• Commission opted for 308 over 309
• Colorado RH SIP submittal must be approved by
  Legislature before formal transmittal to EPA

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Colorado Regional Haze SIP A Compressed Timeline
for Decisions
Colorados share of emission reductions
including - BART or superior alternative -
Construction and fire - All other sources
Official Submittal SIP date- Dec./Jan. 2008
Determine current Levels and presumptive
Reasonable progress
Determine state-by-state contributions to Class
I areas
Regional-scale modeling of base cases for 2002
and 2018 and control scenarios testing
Develop SIP Develop TSD SIP Hearings
2004
2005
2006
2007
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SIP Technical ActivitiesAttribution of
Haze2018 Base Case and Control Scenarios
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EPA Framework

• Draft Guidance for Demonstrating Attainment of
  Air Quality Goals for PM2.5 and Regional Haze,
  January 2001
• Living document - may be revised as needed and
  posted on EPAs website http//www.epa.gov/scram00
  1/guidance/guide/draft_pm.pdf
• Will finalize guidance as part of PM2.5
  implementation rule- 2005?

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Regional Haze SIP Modeling

• The 2018 Base Case will define the amount of
  additional reductions still needed to meet
  Reasonable Progress
• EPA has indicated the Weight of Evidence approach
  will be used to demonstrate RP goal is met
• The 2018 control scenarios will establish
  estimates of number of tons of emissions and
  deciview improvement needed to meet Reasonable
  Progress Goal
• Specific source reductions and how achieved will
  be a state role

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Attribution of Haze

• Enhancements to Phase I
• RMC training for states/tribes on AoH methods and
  tools
• States/tribes run control scenarios

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A Class I Areas A Step-by Step Analysis Needed
1. Click on the COHA Site Assessment
link (http//coha.dri.edu/web/state_analysis/Color
ado/RockyMountainNP.html)   2. Go to the last
link at the bottom of the page, Trajectory
Regression Results (http//coha.dri.edu/web/state_
analysis/Colorado/ROMO1/ROMO1_trajregress.html) Th
is page will show the attributions in graphical
form for all regions, including the 4 quadrants
of Colorado.   3. Click on Tabular Regression
Results to get a tabular listing of
the information (http//coha.dri.edu/web/state_ana
lysis/Colorado/ROMO1/ROMO1_trajregress_tables.html
)  
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Use AoH information to develop the RH SIP control
options

• 1.Concise definition of the problem for each
  Class I area in state identify source
  categories contributions
• 2. Use with other tools (modeling, statistical
  models) make case for reductions and develop
  strategies
• 3. Develop draft SIP document to frame issues for
  policy and planning discussions (see our handout)

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Questions