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7115014 View Document- California Cade of Reg ulations (b) Liner compatibility, corrosion, or oAterial compatibility studies. • "Treatability study sample" means a small quantity of hazardous waste, of no more than 400 , ograms (kg), which will be subject to a treatability study. "Treatment" means any method, technique, or process which changes or is designed to charge the physical, chemical, or biological character or composition of any hazardous waste or any material contained therein, or removes or reduces its harmful properties or characteristics for any purpose includirg, but not limited to, energy recovery, material recovery or reduction in volume. "Treatment zone" means a soil area of the unsaturated zone of a land treatment unit within which hazardous constituents and constituents of concern are degraded, transformed or immobilized. A treatment zone may not extend more than five feet below the initial surface and the base of the treatment zone shall be a minimum of five feet above the highest anticipated elevation of underlying groundwater. "Truck" means a motor vehicle, excluding truck tractor, designed, used or maintained primadlyfor the transportation of property or waste. "TTLC" see "Total threshold limiting concentration." "Underground injection" means the subsurface emplacement of fluids through a bored, drilled or driven well; or through a dug well, where the depth of the dug well is greater than the largest surface dimension. (See also "injection well.") "Underground source of drinking water" or"USDW' means an aquifer or its portion: (a)(1) which supplies any public water system; or RECEIVED (2) which contains a sufficient quantity of ground water to supply a public water system; and (A) currently supplies drinking water for human consumption; or AUG 0 5 2014 (B) contains fewer than 10,000 mgA total dissolved solids; and ENVIRONMENTAL HEALTH (b) which is not an exempted aquifer. R'E NT IEIVfT "Underground tank" means a device meeting the definition of "tank" in this section which is substantially or tota beneath a surface of the ground. "Underlying hazardous constituent" means any constituent listed in section 66268.48, Table UTS - Universal Treatment Standards, except fluoride, selenium, sulfides, vanadium, and zinc, which can reasonably be expected to be present at the point of generation of the hazardous waste at a concentration above the constituent -specific UTS treatment standards. . "Unfit -for -use tank system" means a tank system that has been determined through an integrity assessment or other inspection to be no longer capable of transferring, storing or treating hazardous waste without posing a threat of release of hazardous waste to the environment. "Unit" means a tank, a container, or a combination of tanks or tank systems and/or containers located together that are used in sequence to treat or accumulate one or more compatible hazardous wastestreams. The devices are either plumbed together or otherwise linked so as to form one system. This definition only applies to Conditional Exemption, Conditional Authorization, and Permit By Rule operations. "Universal waste" means any of the wastes that are listed in section 66261.9. "Unsaturated zone," "Vadose zone," or "zone of aeration" means the zone between the land surface and the water table. "United States" means the 50 States, the District of Columbia, the Commonwealth of Puerto Rico, the U.S. Virgin Islands, Guam, American Samoa and the commonwealth of the Northern Mariana Islands. "Uppermost aquifer"means the geologic formation nearest the natural ground surface that is an aquifer, as well as lower aquifers that are hydraulically interconnected with this aquifer. "Used oil 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. "Used or reused" means that a material is either: (a) employed as an ingredient, including use as an intermediate, in an industrial process to make a product (for example, distillation bottoms from one process used as feedstock in another process). However, a material will not satisfy this condition if distinct components of the material are recovered as separate end products (as when metals are recovered from metal -containing secondary materials); or (b) employed in a particularfunction orapplication as an effective substitute fora commercial product (for example, spent pickle liquor used as phosphorous precipitant and sludge conditioner in wastewater treatment). "USEPA Administrator" or "Administrator" means the Administrator of the federal Environmental Protection Agency, or the Administrators designee. "USEPA Regional Administrator'see "Regional Administrator." "Vacuum tank" means a cargo tank which has the capability of being subjected to a vacuum or a pressure for purposes of loading and https://gW.wesdaw.corrVealregs/DocumerrUl9F2AC740D4BA11DE8879F88E8BODAAAE?iewTWe=FullTe)d&priginationConteM=documenttoc&transiflonTW... 23130