Identification of plan.

On September 21, 2015, Michigan submitted a State Plan for implementing the emission guidelines for Sewage Sludge Incinerators (SSI). The enforceable mechanism for this State Plan is a State rule codified in R 336.1972, “Emission standards for existing sewage sludge incineration units,” and R 336.1902 “Adoption of standards by reference.” The State's final rule became effective on May 20, 2015. [80 FR 70697, Nov. 16, 2015]