Wastewater treatment process
Wastewater treatment process includes any process which modifies characteristics such as BOD, COD, TSS, and pH, usually for the purpose of meeting effluent guidelines and standards; it does not include any process the purpose of which is to remove vinyl chloride from water to meet requirements of this subpart.
Source
40 CFR § 61.61
Scoping language
Terms used in this subpart are defined in the Act, in subpart A of this part, or in this section as follows: