40 C.F.R. § 60.4770
Does this subpart apply to my sewage sludge incineration unit?
Yes, your SSI unit is an affected source if it meets all the criteria specified in paragraphs (a) through (c) of this section.
(a) Your SSI unit is a SSI unit for which construction commenced after October 14, 2010 or for which modification commenced after September 21, 2011.
(b) Your SSI unit is a SSI unit as defined in § 60.4930.
(c) Your SSI unit is not exempt under § 60.4780.