Description
The City of Philadelphia Water Department is seeking prequalification bids for the replacement of the corrosion control system at the Roxborough Fresh Water Storage Tanks. The project involves the design and installation of a new cathodic protection system for the tanks. The prequalification bid is the first step in the process, and only approved sellers will be invited to participate in the closed bid solicitation. The estimated range for the project is between $300,000 and $500,000.
Key aspects of the project include:
• Replacement of the existing cathodic protection system with a new system
• Design and installation of a new cathodic protection system for the tanks
• Use of mixed metal oxide coated titanium tubes as anodes
• Installation of anodes in 15-foot deep holes with coke breeze backfill
• Use of rectifiers with a DC output capacity of 30V and 16A
• Installation of permanent reference electrodes and test stations
• Compliance with ANSI/AWWA Standard D104 and ANSI/NSF 61
• A minimum anode design life of 20 years
• Pressure entrance fittings to accommodate anode and reference electrode lead wires
• Insulation of all wiring within the tank to prevent copper conductor to water contact.