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Proposal to Revise Wood Stove Curtailment Values

Proposal to Revise Wood Stove Curtailment Values. Spokane Regional Clean Agency Prepared by Ron Edgar. Review of Spokane County Wood Stove Curtailments Between 2001 & 2007. Review of PM 2.5 Data. A look at PM 2.5 excursions above 35µg/m 3. Table of PM 2.5 Events. Events Above 20µg/m 3.

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Proposal to Revise Wood Stove Curtailment Values

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  1. Proposal to Revise Wood Stove Curtailment Values Spokane Regional Clean Agency Prepared by Ron Edgar

  2. Review of Spokane CountyWood Stove Curtailments Between 2001 & 2007

  3. Review of PM2.5 Data A look at PM2.5 excursions above 35µg/m3

  4. Table of PM2.5 Events

  5. Events Above 20µg/m3

  6. Graphs of PM25 Events

  7. All the Plots in One

  8. Analysis of Overlay

  9. Curtailment Program Goals • Protect public health by keeping PM2.5 values below the standard • Call as few curtailments as possible and still protect the public health • Encourage replacement of un-certified stoves by use of 2 levels of curtailment

  10. Conclusions • A two stage curtailment program could work with trigger values of 20 & 30 • Not all values above 20 will trigger a curtailment • 5 to 9 curtailments a season, 2 to 5 days long

  11. Next Steps • Draft regulation will go out for Public Comment. • Back for Board in September for adoption before the start of the heating season.

  12. Next Two Heating Seasons • Track effectiveness of the curtailments • Track ability to forecast and call curtailments • Make improvements as necessary. • Determine the feasibility of continuing a two stage curtailment program

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