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APPLICATION OF MODELS FOR SIP ATTAINMENT TEST and NEW SOURCE REVIEW. Denis Lohman EPA Region 3 February 20, 2008. Consistency. Objective Demonstrate attainment and maintenance of NAAQS Accuracy Replicability Time Space. SIP Attainment. Demonstrate performance of model

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Application of models for sip attainment test and new source review

APPLICATION OF MODELS FOR SIP ATTAINMENT TEST andNEW SOURCE REVIEW

Denis Lohman

EPA Region 3

February 20, 2008


Consistency
Consistency

  • Objective

    • Demonstrate attainment and maintenance of NAAQS

    • Accuracy

    • Replicability

  • Time

  • Space


Sip attainment
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


New source review
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


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

SIP versus NSR


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