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- Used oil must be stored in tanks or contain- ers in good condition. Tanks and containers must be made of non -earthen, non -absorbing, rust -re- sistant material such as steel or oil -resistant plastic, and have adequate structural support to contain the used oil. "Good condition" means no severe rust- ing, no apparent structural defects or deterioration, and no leaking. All tanks and containers must have tight -fitting lids that are kept closed except when used oil is being added or removed. Regular inspections and routine maintenance of all stor- age tanks and containers are required. Faulty tanks and containers must be repaired or replaced. • Secondary containment for storage tanks is required. Secondary containment is a backup containment system designed to prevent the release and migration of wastes or accumulated liquids out of a storage tank or a storage tank system Examples of secondary containment systems include: an im- pervious barrier such as a liner, a vault, a double - walled tank or an impervious bermed area. • Aboveground storage tanks and containers accumulating used oil, and fill pipes used to transfer used oil into underground storage tanks must be labeled with the words "USED OIL - HAZARDOUS WASTE," the initial date of ac- cumulation, and the name and address of the generator. For shipping, containers must also be labeled with the following: • The statement: "Hazardous Waste - State and Federal Law Prohibit Improper Dis- posal. If found, contact the nearest police or public safety authority, the U.S. Envi- ronmental Protection Agency or the Cali- fornia Department of Toxic Substances Control." - The generator's name and address. • The proper Department of Transportation (DOT) shipping name and the generator's identification number. - The Uniform Hazardous Waste Manifest riffill - The shipping identification number. • Additional requirements for used oil genera- tors are contained in the HSC and 22 CCR pro- visions cited at the beginning of this fact sheet. The Rebuttable Presumption (Total Halogens Determination) The Used Oil Handler is Required to Make a Total Halogens Determination: Testing or Application or Knowledge 1'000 pom O D 'otal Halogens Halogens I ITotal T'Hot Load" } }IW Solely DIY! UNLESS: Demonstrate d 0-1 Us- OiI That The Used Oil Was Not Miall rirm tsYV Solely Metal USED Working Oils Solely OIL CFC>Rafngeration Oils USED USED OIL OIL USED OIL Used oil handlers (e.g., generators, used oil col- lection centers, transporters and used oil recy- cling facilities) are required to determine whether the total halogen content of each used oil shipment exceeds 1,000 ppm halogens. Used oil determined to contain more than 1,000 ppm total halogens is presumed to have been mixed with halogenated hazardous waste. Used oil containing more than 1,000 ppm total halogens must be managed as a Resource Conservation and Recovery Act (RCRA) hazardous waste un- less the used oil can be demonstrated not to have been mixed with halogenated hazardous waste (i.e., unless the presumption is rebutted). This requirement is called the "rebuttable presumption." - 3 - DTSC Used Oil and Used Oil Filters Fact Sheet