This subpart exempts combustion units that incinerate sewage sludge and are not located at a wastewater treatment facility designed to treat domestic sewage sludge. These units may be subject to another subpart of this part (e.g., subpart III of this part). If you own or operate such a combustion unit, you must notify the Administrator of an exemption claim under this section.
40 C.F.R. §62.15860