Upgrade Domestic Hot and Cold Water Systems

1, Install a new point-of-entry Copper / Silver Ionization system at the main water service entrance in Building 2. Remove dead legs from the existing water system by capping dead legs at the domestic water supply within 1.5x the diameter of the dead leg pipe. Provide Thermostatic mixing valves for all existing fixtures that lack them, and recalibrate existing ones. Provide a domestic cold water shell and tube heat exchanger (with chilled water) to limit the temperature of incoming water from the City of San Diego. Provide a circulation system for Domestic Cold Water within Building 1 to ensure control of DCW water temperature at the most distant distribution point. Replace existing DCW and DHW valves with full-port ball valves to mitigate any future build-up of bacteria. Use of electric point-of-use water heaters at (2) temperature deficient fixture locations. Provide automated monitoring through the installation of sampling stations at distal points throughout Buildings 1, 2, and 11. These sampling stations will monitor, at a minimum, the following: Chlorine levels in the domestic hot and cold-water systems Temperature in the domestic hot and cold-water systems pH levels in the domestic hot and cold-water systems Total Dissolved Solids (TDS) in the domestic hot and cold-water systems.

Division 33 -

Utilities, Instrumentation and Control for Utilities, Water Utilities, Water Utility Distribution Piping, Water Utility Distribution Equipment, Disinfecting of Water Utility Distribution, Water Utility Storage Tanks.