Combustion Turbine MACT Update Sandra Y. Snyder June 5, 2018 4:15 - - PowerPoint PPT Presentation

▶
combustion turbine mact update
SMART_READER_LITE
LIVE PREVIEW

Combustion Turbine MACT Update Sandra Y. Snyder June 5, 2018 4:15 - - PowerPoint PPT Presentation

Dec 05, 2023 386 likes •475 views

Combustion Turbine MACT Update Sandra Y. Snyder June 5, 2018 4:15 pm 4:45 pm Turbine NESHAP 40 C.F.R. 63, Subpart YYYY Turbine NESHAP Final Rule Proposed rule: 68 Fed. Reg. 1,888 (Jan. 14, 2003) New if reconstructed

slide-1
SLIDE 1

Sandra Y. Snyder

June 5, 2018 4:15 pm – 4:45 pm

Combustion Turbine MACT Update

slide-2
SLIDE 2
  • Turbine NESHAP Final Rule
  • Proposed rule:

– 68 Fed. Reg. 1,888 (Jan. 14, 2003) – “New” if reconstructed on or after Jan. 14, 2003

  • Final rule & effective date:

– 69 Fed. Reg. 10,513 (Mar. 5, 2004)

Turbine NESHAP 40 C.F.R. 63, Subpart YYYY

slide-3
SLIDE 3
  • Final rule - formaldehyde emission standard
  • 91 ppbvd @ 15%O2 for new / reconstructed turbines

located at a major source of HAP emissions

  • Affected units are ≥1 MW at ISO conditions

Turbine NESHAP 40 C.F.R. 63, Subpart YYYY

slide-4
SLIDE 4
  • De-listing petition filed
  • EPA proposed to delist 4 subcategories
  • Rule stayed for Gas-Fired Turbines on Aug. 18, 2004
  • But pursuant to the Plywood NESHAP case, source

categories (e.g., turbines) can be delisted, but not subcategories (e.g., natural gas-fired turbines)

  • De-listing request for gas-fired turbine subcategories

will likely be denied and stay rescinded

Rule Stay / De-listing Status

slide-5
SLIDE 5
  • Rulemaking schedule set by lawsuit re: failure to

conduct 8-year RTR for 20 source categories (including turbines)

  • EPA outreach to stakeholders re: RTR
  • Mar. 2018 - INGAA submitted comments (e.g., new

technology or add-on controls, catalyst costs, formaldehyde measurement)

  • Apr. 2018 – EPA outreach to INGAA and others
  • May 2018 – INGAA provided additional feedback to EPA

Residual Risk & Technology Review (RTR)

slide-6
SLIDE 6
  • Concerns with EPA’s data: Some turbines have

modeled risk above acceptable thresholds

  • 1 compressor station in LA with inhalation risk

above 1 in a million

– Emission rate – Stack exit velocity – Exhaust temperature

  • Arsenic above screening value

– 17 liquid-fired units

Response to April EPA Inquiry

slide-7
SLIDE 7
  • Future considerations:
  • Standards for existing units, smaller units, etc.
  • Startup requirements or a “work practice” approach

similar to RICE NESHAP?

  • EPA may allow 2 years or more to comply

Additional Concerns

slide-8
SLIDE 8

Questions?