Section 329IAC13-2-16. "Re-refining distillation bottoms" defined  


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  •    "Re-refining distillation bottoms" means the heavy fraction produced by vacuum distillation of filtered and dehydrated used oil. The composition of still bottoms varies with column operation and feedstock. (Solid Waste Management Division; 329 IAC 13-2-16; filed Feb 3, 1997, 9:15 a.m.: 20 IR 1492; readopted filed Jan 10, 2001, 3:25 p.m.: 24 IR 1535)