California Code, Health and Safety Code - HSC § 25210.1

(1) “Halocarbon chemicals” means chemical compounds which contain carbon, and one or more halogens, and which may include hydrogen, including, but not limited to, trichloroethane, tetrachloroethylene, methylene chloride, halogenated benzenes, and carbon tetrachloride.

(2) “Aromatic hydrocarbon chemicals” means chemical compounds containing carbon and hydrogen and at least one six-carbon ring containing double bonds, including, but not limited to, benzene, toluene, and napthalene.

(3) “Sewage disposal system” means a septic tank, cesspool, sewage seepage pit, leachline, or other structure into which sewage is drained for purposes of disposal and which is not connected to a municipal treatment works.