PROJECT NO. 24-147.149 - WES BROWN PAC FACILITY AND LAGOON

Project Description: The scope for this Professional Service Agreement includes the design
for the construction of the WBWTP PAC Facility and Lagoon Discharge. The Project will be
bid as one bid-package.
The purpose is to ensure proper de-chlorination and pH adjustment of sludge lagoon
discharge to the Gravel Lakes. The clarifiers and membrane reject tank located at the Wes
Brown Water Treatment Plant (WBWTP) are drained periodically to the lagoons on the east
side of the plant. The clarifier residuals consist of a slurry including Powder Activated
Carbon (PAC) and aluminum hydroxide solids which typically have no chlorine residual.
The membrane tank residuals have low concentrations of solids and chlorine.