HSC § 25250.5

(a) The disposal of used oil by discharge to sewers, drainage systems, surface water or groundwater, watercourses, or marine waters; by incineration or burning as fuel; or by deposit on land, is prohibited, unless authorized under other provisions of law.

(b) The use of used oil or recycled oil as a dust suppressant or insect or weed control agent is prohibited unless allowed under another applicable law, but only to the extent that use as a dust suppressant or insect or weed control agent is consistent with the federal act.