The EPA is amending the effective date of the standard for particulate matter for new cement kilns that burn hazardous waste. EPA promulgated this standard as part of the national emission standards for hazardous air pollutants (NESHAP) for hazardous waste combustors that were issued on October 12, 2005, under section 112 of the Clean Air Act. EPA agreed to reconsider the standard and proposed to change it on March 23, 2006 (71 FR 14665). This amendment suspends the obligation of new cement kilns to comply with the particulate matter standard until EPA takes final action on this proposal. This amendment does not affect other standards applicable to new or existing hazardous waste burning cement kilns.