1 / 9

BART Update

BART Update. Regional Modelers Workshop March 8-10, 2005. Regional Haze Timeline. July 1999 - Regional haze rule finalized May 2002 - Rule vacated in part, sustained in part

jared
Télécharger la présentation

BART Update

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. BART Update Regional Modelers Workshop March 8-10, 2005

  2. Regional Haze Timeline • July 1999 - Regional haze rule finalized • May 2002 - Rule vacated in part, sustained in part • Court objected to inclusion of individual sources based on collective assessment of visibility impacts from all sources • April 2004 - Deadline for Reproposal • April 2005 - Deadline for final action • SIPs due 3 years after designation of PM2.5 attainment and nonattainment areasand in no event later than December 17, 2007

  3. Background - What is BART? • CAA: certain large existing sources must establish controls (BART) • BART-Eligible Sources • Major stationary source • 26 categories (same as PSD) • Placed into operation: 1962-1977 • Potential to emit 250 tons of any pollutant reasonably anticipated to contribute to regional haze in any Class I area • Sources which are reasonably anticipated to contribute to regional haze in any Class I area <CALPUFF> • Estimated total number of facilities affected is less than 1000 nationwide, including 302 EGUs.

  4. Background - How is BART determined? • For each source, State must consider 5 factors: • Control technology available • Controls already in place at the source • Cost of compliance • Remaining useful life • Energy and nonair environmental impacts • Degree of visibility improvement from use of such technology <CALPUFF>

  5. BART Provisions (proposed) • Control Levels for SO2 and NOx from EGUs, • States must require these control levels at >750 MW plants, unless analysis of other BART factors dictate otherwise. • We presume that States should require these control levels at >200 MW units, unless analysis of other BART factors dictates otherwise. • Proposed limits: • SO2 - 95% or 0.1 lb/MMBtu, NOx – 0.2 lb/MMBtu • Note: NOx differences exist for boiler type and coal type (evaluating in final rule) • Regional Haze rule allows trading as alternative to source-by-source BART

  6. One major issue with 1999 RH rule – determining visibility impacts • Approach did not account for impacts on haze of individual source controls • Court vacated and remanded cumulative approach and directed us to revise RH rule to allow States to exempt an individual source from BART based on its visibility impacts <CALPUFF> • Revise BART Guidelines to provide methodology for individual source exemptions

  7. How would modeling be used to Respond to the Remand? • Source by source analysis – 2 parts • States use CALPUFF (or other approved model) modeling to: • Exempt individual sources or determine they are subject to BART • Compare 24-hour results to a deciview threshold • Show “degree of improvement in visibility” based on controls once they are subject to BART – evaluated as one of five factors in control technology determination • Visibility Metric for modeling: deciview • We acknowledge CALPUFF has flaws – we are addressing in final rule. • Alternatives to CALPUFF (non-modeling)

More Related