Cal. HSC § 25120.5

“Recyclable material” means a hazardous waste that is capable of being recycled, including, but not limited to, any of the following: (a) A residue. (b) A spent material, including, but not limited to, a used or spent stripping or plating solution or etchant. (c) A material that is contaminated to such an extent that it can no longer be used for the purpose for which it was originally purchased or manufactured. (d) A byproduct listed in the regulations adopted by the department as “hazardous waste from specific sources” or “hazardous waste from nonspecific sources. ” (e) Any retrograde material that has not been used, distributed, or reclaimed through treatment by the original manufacturer or owner by the later of the following dates: (1) One year after the date when the material became a retrograde material. (2) If the material has been returned to the original manufacturer, one year after the material is returned to the original manufacturer.