Philadelphia Water Department, Samuel S. Baxter Water Treatment Plant

Project Overview

The enhancements to the Samuel S. Baxter Water Treatment Plant proposed in the City’s Water Master Plan include a disinfection strategy to ensure compliance with the EPA Long Term 2 Enhanced Surface Water Treatment Rule requirements, plan for potential future regulatory requirements, minimize disinfection by-products (DBPs) production, and provide redundant conduits within the WTP to maintain long term water quality compliance and reliable treatment. To meet these objectives, the Water Management Plan proposes a combination of a UV disinfection facility, the conversion of an existing finished water storage basin to free chlorine contact chamber and the addition of chlorine dioxide tank and feed system. Chlorine dioxide is proposed as a pre-oxidant to be used in combination with the free chlorine contact chamber which would delay the addition of chlorine in the treatment process, which would reduce the formation of DBPs while limiting the biological growth in the flocculation and sedimentation basins. Low head pumps are also proposed as a result of anticipated head losses in the UV disinfection facility.

Envision is responsible for providing order of magnitude AIM/AERO cost estimating services and supported the Master Plan for the City of Philadelphia’s Department of Water’s Samuel S. Baxter Water Treatment Plant project.