APPLICATION OF MODELS FOR SIP ATTAINMENT TEST and NEW SOURCE REVIEW

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APPLICATION OF MODELS FOR SIP ATTAINMENT TEST
andNEW SOURCE REVIEW

• Denis Lohman
• EPA Region 3
• February 20, 2008

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Consistency

• Objective
• Demonstrate attainment and maintenance of NAAQS
• Accuracy
• Replicability
• Time
• Space

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SIP Attainment

• Demonstrate performance of model
• Baseline emissions
• Estimate baseline air quality
• Calculate future air quality
• Project future emissions
• Project future air quality
• RRF Future Baseline
• Multiply Design Concentrations by RRF to Estimate
  Future Design Concentration

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New Source Review

• No modeling in nonattainment areas
• Attainment Areas
• Allowable Emissions
• Add background
• Cause/contribute to violations?
• Interim Guidance Use PM10 program as surrogate
  for PM2.5

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SIP versus NSR

• O3, PM, RH Guidance
• Receptor oriented
• Actual emissions
• Many sources
• NAA
• IC/BC
• Relative results
• Design Site Test

• Appendix W
• Source oriented
• Allowable emissions
• Few sources
• SIA
• Background
• Absolute results
• Ambient Air Test