California Code, Health and Safety Code - HSC § 41805

(a) The Legislature hereby finds and declares that, because sanitary landfill sites are very difficult to obtain, these valuable sites should be reserved for high-priority waste such as garbage and low-volume rubbish, and that the disposal, by open outdoor fires of high-volume wood waste will help prolong the life of such landfill sites. However, it is the intent of the Legislature that the disposal, by open outdoor fires, of such waste be reasonably regulated so as to not create a nuisance or significantly reduce the quality of the ambient air.

(b) Therefore, the state board shall conduct studies of alternative methods of disposing of wood waste from trees, vines, or bushes, other than by open outdoor fires.