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EPA Issues Proposed Boiler MACT, Area Source NESHAP, and CISWI Revisions

U.S. EPA has proposed a new version of the Boiler Major Source NESHAP (“Boiler MACT”) and amendments to the Boiler Area Source NESHAP, CISWI Incinerator NSPS, and Definition of Solid Waste. EPS is currently reviewing these standards to assess potential impacts on our affected clients. Upon publication in the Federal Register, EPA will accept comments for 60 days. EPA plans on finalizing these standards by Spring 2012.

Here are some of the initial highlights:

Area Source NESHAP

  • The current final rule remains in effect.
  • Mercury standards for coal-fired boilers are relaxed.
  • Particulate standards for biomass and oil-fired boilers unchanged.
  • The current deadline for existing source initial tune-ups (March 21, 2012) is proposed to be extended by one year.

Major Source NESHAP

  • Existing source compliance date would be 3 years after final rule publication.
  • Emissions limits changed from the previous MACT based on new subcategories and data collected in 2011.
  • Several emission limits are more stringent than the previous final MACT, while others are relaxed.
  • As an alternative to the PM limit, a total selected metals (TSM) limit is available for select subcategories.
  • The numerical dioxin emission limits are replaced by work practice standards.

Definition of Solid Waste

  • Definitions and legitimacy criteria are revised to clarify which non-hazardous secondary materials (NHSM) are non-waste fuels when burned.
  • The clean cellulosic biomass definition are expanded.
  • Categorical non-waste determinations are proposed for scrap tires and resinated wood.

The pre-publication versions of the rules are available here:

Contact your EPS consultant or call (404) 315-9113 with questions regarding these standards.

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