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Document Record Detail

Full Document:
RCRA Online Number:14764
Organization of Recipient:National Paint and Coatings Association
Description: In a batch process, as with accumulation in containers, the 90-day period begins the moment the generator first places hazardous wastes in an “empty tank.” The generator then must remove all wastes from the tank within 90 days from the time he first places wastes in the “empty” tank. A tank will be considered empty when its contents have been drained to the fullest extent possible. Since many tank designs do not allow for complete tank drainage due to flanges, screens or siphons, it is not expected that 100% of the wastes will always be removed. As general guidance, a tank should be considered empty when the generator has left the tank’s drainage system open until a steady, continuous flow has ceased (see also 47 FR 1250; January 11, 1982). Under the continuous flow process, in contrast to the batch process, the tank receives hazardous waste on an ongoing, continuous basis. When wastes are flowing through tanks continuously, there is a means of demonstrating when a tank is “emptied” within 90 days under 40 CFR 262.34(a)(1)(ii) that would not require completely emptying the tank, and that may be more suitable for tanks with continuous flow called mass balance approach.
Regulatory Citation(s) : 262.34(a)(1)(ii), 265.197(c), 265.200 EXIT disclaimer
Statutory Citation(s):NA Read US Code 42, Chapter 82 EXIT disclaimer
Topic(s):Generators; Tanks
Approximate Number of Hardcopy Pages:4
EPA Publication Number:NA
RPPC Number (if applicable): NA
Official OSW Policy:Yes


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