The Federal RCRA regulations do not prohibit you from placing previously stored hazardous waste into a WWTU. Additionally, components of units at a facility do not have to be connected. Wastewater can be piped, trucked, or otherwise conveyed between WWTUs.
These following guidance documents provide additional clarification on the applicability of the WWTU exemption:
Memo, Skinner to Scarbrough; December 26, 1984 (RCRA Online #11050)
Memo, Skinner to Scarbrough; December 24, 1984 (RCRA Online #12354)
If hazardous waste has been stored temporarily in a container, can it still be placed in a wastewater treatment unit (WWTU)?
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