California Code, Health and Safety Code - HSC § 25366.5

(a) A public agency operating a household hazardous waste collection program or a person operating such a program under a written agreement with a public agency, or, for material received from the public as used oil, a person operating a certified used oil collection center as provided in Section 48660 of the Public Resources Code, shall not be held liable in a cost recovery action brought pursuant to Section 25360, including, but not limited to, an action to recover the fees imposed by Section 25343 or an action brought pursuant to subdivision (d) of Section 25363, for waste that has been properly handled and transported to an authorized hazardous waste treatment, storage, or disposal facility at a location other than that of the collection program.

(b) For purposes of this section, “household hazardous waste collection program” means a program or facility, specified in Section 25218.1, in which hazardous wastes from households and very small quantity generators are collected and ultimately transferred to an authorized hazardous waste treatment, storage, or disposal facility.

(c) Except as provided in subdivision (a), this section does not affect or modify the obligations or liabilities of a person imposed pursuant to state or federal law.