Combustion MACT

In November 2002, EPA Administrator Whitman proposed national emission standards for hazardous air pollutants (NESHAP) from combustion sources: commercial/institutional boilers and process heaters; stationary combustion turbines, and stationary reciprocating internal combustion engines. This action implements Section 112(d) of the Clean Air Act by requiring all major sources to meet hazardous air pollutant standards (HAPs).

EPA has signed all three combustion rulemakings. Both the combustion turbine and the reciprocating internal combustion engines have been published in the Federal Register. Information on each of these rulemakings can be obtained at the EPA web sites listed below.

On April 4, 2004, EPA proposed to stay the effectiveness of the combustion turbines NESHAP for new sources in the lean premix gas-fired turbines and diffusion flame gas-fired turbines subcategories, which are the two principal subcategories EPA is proposing to de-list. (69 FR 18338) According to EPA, this action is necessary to avoid wasteful and unwarranted expenditures on installation of emission controls which will not be required if the subcategories are de-listed. In a related action, EPA proposed to amend the list of source categories that was developed pursuant to section 112(c)(1) of the Clean Air Act (CAA) by deleting four subcategories from the Stationary Combustion Turbines source category. (69 FR 18327)

Boiler & process heaters

Combustion turbines final rule and proposals to delist

Reciprocating internal combustion engines