“Manufactured gas” means a mixture of gaseous hydrocarbons that can include propane, propylene, butane, butylene, or isobutane, or any combination thereof, mixed in any proportion with each other or with air, that is produced by separating hydrocarbons of greater density from natural gas or oil-refinery gas.

Source. #6519-A, eff 5-29-97; renumbered by #8256 (from Env-A 101.170), (see Revision Note #1 at chapter heading); renumbered by #8304 (see Revision Note #2 at chapter heading); renumbered by #9839 (from Env-A 101.115), (see Revision Note #3 at chapter heading); ss by #13105, eff 9-25-20 (formerly Env-A 101.117) (see Revision Note #4 at chapter heading for Env-A 100)