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Substituting Sulfate for Sulfur

Substituting Sulfate for Sulfur. Impact on the RHR metrics and control strategies Presented at the 2006 IMPROVE Steering Committee Meeting by B.A. Schichtel. Sulfur/Sulfate on Best & Worst Haze Days. Average 3*S/SO4 on worst 20% haze days = 1 Average 3*S/SO4 on best 20% haze days = 1.05.

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Substituting Sulfate for Sulfur

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  1. Substituting Sulfate for Sulfur Impact on the RHR metrics and control strategies Presented at the 2006 IMPROVE Steering Committee Meeting by B.A. Schichtel

  2. Sulfur/Sulfate on Best & Worst Haze Days • Average 3*S/SO4 on worst 20% haze days = 1 • Average 3*S/SO4 on best 20% haze days = 1.05 Alaska

  3. Worst Haze Days 3*S/SO4

  4. Sulfur vs Sulfate at Three California Sites

  5. Impact of Sulfate Replacement on RHR Worst 20% Haze Metric

  6. Current Hazy Baseline – Proposed Baseline

  7. Ammonium Sulfate’s contribution to Natural Background Light Extinction • 2-15% of natural haze on the 20% haziest days is due to sulfate • Sulfate replacement will have minimal impact on natural haze

  8. Change in Control Strategy to Meet New 2018 Progress Goal • To meet the NEW 2018 progress goal, anthropogenic contributions to bext need to be reduced by 0 to 0.8% more at 60 sites and 0 – 0.3% less at 50 sites. Need to reduce SO2 emissions by Additional 0.6% to attain 2018 progress goal at Shenandoah

  9. Conclusion Substituting sulfate for sulfur in the RHR will have little effect on control strategies to meet the 2018 progress goals – (I think)

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