California Code, Vehicle Code - VEH § 38320

(a) No person shall throw or deposit, nor shall the registered owner or the driver, if such owner is not then present in the vehicle, aid or abet in the throwing or depositing, upon any area, public or private, any bottle, can, garbage, glass, nail, offal, paper, wire, any substance likely to injure or kill wild or domestic animal or plant life or damage traffic using such area, or any noisome, nauseous or offensive matter of any kind.

(b) No person shall place, deposit or dump, or cause to be placed, deposited or dumped, any rocks or dirt in or upon any area, public or private, without the consent of the property owner or public agency having jurisdiction over the area.

(c) Any person who violates this section shall, upon conviction thereof, be punished by a fine of not less than fifty dollars ($50). No part of such fine shall be suspended. The court may permit the fine required by this section to be paid in installments if the court determines that the defendant is unable to pay the fine in one lump sum.