The project is in the City of Jacksonville Beach and consists of the following general improvements at Water Treatment Plant (WTP) 1 and 2, and the Pollution Control Plant (PCP):
Conversion of the existing chlorine gas disinfection system to liquid sodium hypochlorite (12.5%) at all three facilities. At each facility, the existing chlorine gas one-ton cylinders and pumps will be demolished, and the new hypochlorite systems installed, including double-wall storage tanks, new pump skid systems, and all necessary piping, electrical and instrumentation work as detailed on the plans. Prior to demolition of the existing chlorine gas system, the contractor shall furnish, install, and pipe to new pump skids a temporary bulk double-wall storage tank as shown on the plans to allow for continuous disinfection. Contractor shall also include chemical and delivery during the temporary system and shall ensure that prompt supply is maintained during the project. Once the new system is installed and is ready for operation, contractor shall ensure that all chemical storage tanks are full of hypochlorite solution. All cost for chemical shall be included on the total base bid.
Once the new hypochlorite disinfection system has been installed and proven to meet staff expectations and regulatory requirements, the Contractor will remove the existing gaseous chlorine storage, feed facilities, and install the permanent sodium hypochlorite systems. At the PCP, the existing concrete chlorine contact basins will be improved to add concrete wall baffles and eliminate short-circuiting. The basins will also receive other improvements a detailed on the plans. Improvements also include replacing existing architectural mason concrete blocks at the WTPs’ chlorine storage rooms with solid-face concrete mason blocks, as well as the replacement of the existing chain-link gates with new aluminum gates as currently exist at the PCP chlorine storage room.
Work also includes the furnishing and installation of two (2) 14-inch butterfly Valves at the SBR air piping system and the furnishing and installation of four (4) air-control valves to regulate the air to each of the SBR basins. The existing 12-inch butterfly valves used for that purpose will be converted from automatic to manual and remain as isolation valves. The existing mass flow meter will be relocated upstream of the new control valve as shown on the plans.