Wastewater treatment unit
Wastewater treatment unit means a device which:
(1) Is part of a wastewater treatment facility that is subject to regulation under either section 402 or 307(b) of the Clean Water Act; and
(2) Receives and treats or stores an influent wastewater that is a hazardous waste as defined in § 261.3 of this chapter, or that generates and accumulates a wastewater treatment sludge that is a hazardous waste as defined in § 261.3 of this chapter, or treats or stores a wastewater treatment sludge which is a hazardous waste as defined in § 261.3 of this Chapter; and
(3) Meets the definition of tank or tank system in § 260.10 of this chapter.
40 CFR § 260.10
When used in parts 260 through 273 of this chapter, the following terms have the meanings given below: