In 1995, the U.S. Environmental Protection Agency (EPA) promulgated regulations for municipal waste combustion units (MWCs). New Source Performance Standards (NSPS) were adopted for new MWCs (Subpart Eb) and Emission Guidelines (EG) were adopted for existing MWCs (Subpart Cb). Litigation followed the promulgation of these regulations. In 1997, the U.S. Court of Appeals ruled that EPA must develop separate regulations for small and large MWCs. The court indicated that the regulations adopted in 1995 were not consistent with Section 129 of the Clean Air Act., In response to this ruling, EPA published a Direct Final Rule on August 25, 1997, amending the 1995 regulations so that they applied only to large MWCs with an individual unit capacity greater than 250 tons per day (tpd). As a result of these changes, regulations must be reestablished for small MWCs. Small MWCs are those with an individual unit capacity between 35 and 250 tpd. Different regulations with different subpart designations are being used for the small MWC rules. Subparts Eb and Cb, as revised in 1997, will remain as regulations for the NSPS and EG for large MWCs. Subparts AAAA and BBBB will be used for small MWCs. This report provides the results of the economic impact analysis (EIA) of the regulation for small MWCs under the new Subparts AAAA and BBBB regulations.

Cover title. Project Officer: Tom Walton. "Author(s): Tayler H. Bingham, Peter Diakov, Virginia Perry"--Colophon. Performed by Research Triangle Institute. Contract Number: 68-D-99-024 "May 2000." Final report. Includes bibliographical references (pages 29-31). "EPA/452-R-00-001." PB2001-101932.