HSC §25250.7: (a) Except as provided in subdivision (b) or (c), no person who generates, stores, or transfers used oil shall intentionally contaminate used oil with other hazardous waste other than minimal amounts

(a) Except as provided in subdivision (b) or (c), no person who generates, stores, or transfers used oil shall intentionally contaminate used oil with other hazardous waste other than minimal amounts of vehicle fuel. (b) A used oil transfer or recycling facility authorized by the department pursuant to Section 25200, 25200.5, or 25201.6 may mix used oil with a contaminated petroleum product or with an oily waste other than wastes listed as hazardous under the federal act, if all of the following conditions are met: (1) If the resultant mixture is subject to regulation as a hazardous waste under paragraph (2) of subsection (b) of Section 279.10 of Title 40 of the Code of Federal Regulations, it is managed as a hazardous waste in accordance with all applicable hazardous waste regulations. (2) The resultant mixture is used to produce recycled oil, as defined in paragraph (3) of subdivision (a) of Section 25250.1, at a used oil recycling facility solely by means of a process that has been specifically authorized by the department to treat these mixtures. (3) The mixing of the used oil with a contaminated petroleum product or an oily waste is specifically authorized in the facility’s permit. (c) A generator or transporter may mix used oil with one or more contaminated petroleum products if the mixture is managed in accordance with Section 25143.2 or if all of the following conditions apply: (1) If the resultant mixture is subject to regulation as a hazardous waste under paragraph (2) of subsection (b) of Section 279.10 of Title 40 of the Code of Federal Regulations, it is managed as a hazardous waste in accordance with all applicable hazardous waste regulations. (2) (A) Except as provided in subparagraph (B), the resultant mixture is transported to a used oil recycling facility that issues a statement, in writing, to the generator or transporter that the mixture will be used to produce recycled oil, as defined in paragraph (3) of subdivision (a) of Section 25250.1, at a facility authorized to operate pursuant to Section 25200 or 25200.5 solely by means of a process that has been specifically authorized by the department to treat these mixtures. (B) If the resultant mixture is transported to a used oil recycling facility located in another state, that facility is authorized by the agency authorized to implement the federal act in that state. (3) The mixing is not conducted in a manner that violates subparagraph (C) of paragraph (3) of subdivision (a) of Section 25250.1. (4) The transporter tests the halogen content of the used oil to demonstrate compliance with clause (vi) of subparagraph (B) of paragraph (3) of subdivision (a) of Section 25250.1 before mixing the used oil with the contaminated petroleum product.