The work consists of performing all necessary work to retrofit the existing Diemer Water Treatment Plant to treat water with an Oxygen/Ozone system.  The work includes; constructing ozone generation building, ozone contactors, contactor influent and effluent conduits, contactor rejection tunnel, Liquid oxygen storage and feed system, chemical feed facilities, unit substation, switchgear building, emergency generator building, large diameter yard conduits and piping; grading; paving; demolition; adding and modifying plant utilities and controls; connections to existing facilities, landscaping; commissioning, training; installation of meter vaults and other ozone/oxygen system equipment.