California Code, Health and Safety Code - HSC § 11473

(a) All seizures under provisions of this chapter, except seizures of vehicles, boats, or airplanes, as specified in subdivision (e) of Section 11470, or seizures of moneys, negotiable instruments, securities, or other things of value as specified in subdivision (f) of Section 11470, shall, upon conviction of the owner or defendant, be ordered destroyed by the court in which conviction was had.

(b) Law enforcement may request of the court that certain uncontaminated science equipment be relinquished to a school or school district for science classroom education in lieu of destruction.