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WESTAR Technical Committee Report

The WESTAR Spring Business Meeting took place on May 22-23, 2013, in San Francisco, CA, co-chaired by Clint Bowman and Phil Allen. This meeting reviewed past six months' activities, including discussions on WEB-based air quality data, notable state peak rates, the potential of MesoWest as a regional data aggregator, and coordination on wildfire and exceptional events information. Additionally, training workshops and studies highlighted various air quality modeling challenges and regulations affecting the region. Looking ahead, emphasis will be placed on evolving PM2.5 guidance and continued inter-state collaboration.

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WESTAR Technical Committee Report

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  1. WESTAR Spring Business Meeting 22 – 23 May 2013, San Francisco, CA Clint Bowman & Phil Allen, Co-Chairs WESTAR Technical Committee Report

  2. Review of Past Six Months • Coordination • Comments • Training • Studies • Information/Discussion

  3. CoordinationReview of Past Six Months • Reviewed and discussed WEB-based air quality data • Most states use commercial products • Some have peak rates of nearly one million per month • MesoWest interested in being regional aggregator • Inter-state coordination of wildfire information

  4. CoordinationReview of Past Six Months • Possible WESTAR clearinghouse for exceptional events: • Ozone intrusions • Wildfire-related events • Regional source produced events • Continued discussion of the 1-hour SO2 NAAQS • Responses to the 120-day letter for 1-hour SO2 • State responses in unclassifiable areas • Making maps (WA) • Waiting (Others)

  5. CoordinationReview of Past Six Months • Further discussion of ozone events • Templates and clearinghouses • Types of exceptional events (dust, wildfires, Asian) • Characteristics of each • Value of an ongoing database • WestJumpAQMS – WRAP

  6. CommentsReview of Past Six Months • 1-hour NO2 letter • Comments on Chet Wayland's reply to WESTAR's comments on the NO2 NAAQS

  7. TrainingReview of Past Six Months • Late April 2013 NASA satellite training workshop in Salt Lake City • Announced Western states workshop—2nd week of July 2013 in Boulder, CO • HY-SPLIT training in the West • Not in budget

  8. StudiesReview of Past Six Months • Modeling vertical cylinders (tanks) • Utah report on oil and gas emissions in Unitah Basin • Oregon DEQ residential wood heating (RWH) survey • Potential collaboration with Washington and Idaho • SCRAM and Linux distributions

  9. Information/DiscussionReview of Past Six Months • Review and discussion of the 2013 EPA Regional/State/Local Modelers' Workshop • General accolades for developing a matrix of topics to direct OAQPS efforts • Discussed implications of the DC Court Decision • Impact of the revocation of the SILs and SMCs • Impact on air quality analyses for PSD

  10. Information/DiscussionReview of Past Six Months • Discussion of implications on air quality modeling of the proposed QMP/QAPP rules • New wording could include permit modeling • Update on the status of IMPROVE budget cuts • Many Western states rely on IMPROVE data

  11. Information/DiscussionReview of Past Six Months • Continued discussion of the Draft Guidance for PM2.5 Permit Modeling • Importance of precursors • Need for tools to evaluate impacts of precursors • Background concentrations

  12. Looking Ahead The Next Six Months • Continue to follow the evolving PM2.5 Guidance • Special emphasis on secondaries and background concentrations • Review and comment on OAQPS's workload matrix • Continue to review the evolving 1-hour SO2 landscape • Other as directed by WESTAR or events

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