Specifications include, but are not limited to: 1.2.1.1 Raw Water Control • Modifications to existing raw water valve pit, including demolition and replacement of existing 36-inch valve, chemical injection quills, and stairs, and installation of a new canopy. 1.2.1.2 Flocculation System • Installation of fifth stage of flocculators within existing flocculation basin(s). • Demolition and replacement of existing flocculation baffles with perforated, stainless steel baffles. 1.2.1.3 Sedimentation Basin • Demolition and replacement of existing trac-vac solids removal system with a cable-vac system with distributed control system (DCS) control within existing sedimentation basin(s). 1.2.1.4 Filter and fluoride buildings • Demolition of filter plant no. 1, including filter beds no. 1 through 6 and associated filter building. • Relocation of emergency plant water system and electrical feeds to accommodate demolition. • Recoating of piping and repair of cracks and recoating of filter pipe gallery walls inside filter plant no. 2. • Demolition of fluoride building. 1.2.1.5 Chlorine Contact Basin (CCB) • Installation of secant pile shoring system to support construction of new CCB and pipeline tie-ins, with the deepest point approximately 35 feet below grade. • Demolition of existing 3.3 MG, buried, rectangular, concrete CCB and construction of a 2.5 MG, buried, circular, prestressed concrete tank with internal concrete baffles. • Demolition and installation of approximately 220-feet of 66-inch pipe, 65-feet of 48-inch pipe, and 110-feet of 30-inch pipe, connected to CCB. • Demolition of pre-CCB chemical injection vault. • Installation of mechanical and structural improvements at the filter effluent flow meter pit. • Installation of treated water flow meter and construction of verification vault.
