EPA is taking direct final action on amendments to the national emissions standards for hazardous air pollutants (NESHAP) for hazardous waste combustors which were issued October 12, 2005, under section 112 of the Clean Air Act. In that rule, we inadvertently included three new or revised bag leak detection system requirements for Phase I sources--incinerators, cement kilns, and lightweight aggregate kilns--among implementation requirements taking effect on December 12, 2005, rather than, as intended, after three years when the sources begin complying with the revised emission standards under the NESHAP for hazardous waste combustors. We intended to establish the compliance date for these provisions three years after promulgation-- October 14, 2008--because the provisions establish more stringent requirements for Phase I sources, which cannot readily be complied with on short notice, and because these provisions are inextricably tied to the revised emissions standards. We are issuing the amendments as a direct final rule, without prior proposal, because we view the revisions as noncontroversial and anticipate no adverse comments.