Cal. Health and Safety Code § 25141

(a) The department shall develop and adopt by regulation criteria and guidelines for the identification of hazardous wastes and extremely hazardous wastes. (b) The criteria and guidelines adopted by the department pursuant to subdivision (a) shall identify as hazardous waste or combinations of waste that, because of the quantity, concentration, or physical, chemical, or infectious characteristics of the waste, may do either of the following: (1) Cause, or significantly contribute to an increase in mortality or an increase in serious irreversible, or incapacitating reversible, illness. (2) Pose a substantial present or potential hazard to human health or the environment, due to factors including, but not limited to, carcinogenicity, acute toxicity, chronic toxicity, bioaccumulative properties, or persistence in the environment, when improperly treated, stored, transported, or disposed of, or otherwise managed. (c) Except as provided in Section 25141.5, any regulations adopted pursuant to this section for the identification of hazardous waste as it read on January 1, 1995, which are in effect on January 1, 1995, shall be deemed to comply with the intent of this section as amended by this act during the 1995 portion of the 1995–96 Regular Session of the Legislature.