Chemical Feed Upgrades and Bulk Water Upgrades [CP#2022-02 | CP#2022-16]

The proposed project herein specified and described includes the following work: The Chemical Feed Upgrades project includes improvements to the following chemical feed systems at the South WTP: lime, chlorine gas, chlorine dioxide, cationic polymer, powdered activated carbon slurry, sodium bisulfite, polyphosphate, sodium hydroxide, and fluoride. For lime the base bid includes replacing existing equipment with four new high density hydrated lime feed systems with control panels. Alternate bid includes replacing existing equipment with four new pebble lime slaker feed system with control panels. Existing bulk storage liquid gas feed system will be replaced with a new bulk storage vacuum gas feed system. All chlorine gas PVC piping will be replaced with new PE piping. Adding a new chlorine dioxide generator to match the existing one to remain for one duty / one stand-by operation. Replacement of existing roto-dips system with three new peristaltic tube pumps for feeding powdered activated carbon. Replacement of existing metering pumps and piping for polyphosphate, sodium hydroxide, sodium bisulfite, fluoride, and cationic polymer. The Bulk Water Upgrades project includes structural, electrical, plumbing, mechanical, exterior concrete and control upgrades to the existing bulk water dispensing station. A separate date for substantial completion of the Bulk Water Upgrades has been specified.