The Environmental Protection Agency released the final boiler Maximum Achievable Control Technology rule December 21. The boiler MACT rule sets emissions standards for boilers, incinerators, and cement manufacturing facilities; the agency also finalized changes to a rule that determines which products would not be considered waste if used as a fuel. The previous day, to meet a court deadline, the agency signed revisions to the 2010 cement manufacturing emissions rule, extending time for industry to implement the rule.