California Code, Vehicle Code - VEH § 34516

(a) No person shall use or arrange for the use of a refrigerated motor vehicle, tank truck, dry van, or other motor vehicle, to provide transportation of food products for human consumption if the vehicle has been used to transport solid waste destined for landfills, or if precluded from use in accordance with subdivision (c).

(b) A violation of this section is a misdemeanor.

(c) If, pursuant to a federal statute having the same purposes as the act which added this section to the Public Utilities Code during the 1990 portion of the 1989-90 Regular Session, the United States Secretary of Transportation publishes a list of categories of solid waste or hazardous substances which he or she determines make food unsafe as a result of having been transported in a refrigerated motor vehicle, tank truck, dry van, or other motor vehicle also used to transport food products for human consumption, subdivisions (a) and (b) apply to those substances.

(d) A person or corporation charged with a violation of this section may avoid liability upon a showing by clear and convincing evidence that the transportation alleged to violate this section did not in fact endanger the public health, due to the specific protective or remedial actions taken by the person or corporation charged.