| Includes | equipment for storing, handling, evaporating, metering, and injecting gaseous chemicals such as chlorine gas, sulfur dioxide, ammonia, chlorine dioxide, carbon dioxide, and other gaseous chemicals, into a liquid process stream. Gas feed equipment may include evaporators, gas-control equipment such as chlorinators or sulfonators, rotameters, ejectors, and similar equipment. 46 31 43, carbon dioxide gas feed equipment, may include storage tank, refrigeration unit, vaporizer, vapor heater, gas regulator, controls, and related equipment. 46 31 53, ozone generating equipment, may include ozone system integration, ozone generators, ozone dissolution system, ozone destruct system, supplemental air system, sampling system and accessories, and ozone system testing. 46 31 56, liquid oxygen storage and feed equipment, may include liquid oxygen tanks and vaporizers associated with ozone systems. |