Specifications include, but are not limited to: Task 1: Water Chemical Feed Pump Replacement and Acquisition of Spare Pump Rebuild Kits The CT Department of Public Health requires that all public water systems have replacement pumps available and ready for immediate replacement in case of chemical pump failures. The Sterling water system will therefore require removal and replacement of the three (3) chemical feed pumps, including three (3) spare pumps and pump rebuilding kits. These new chemical feed pumps will be connected to the existing injection lines and injection check valves. Specific scope for Task 1 includes: - Purchase and delivery of six (6) peristaltic chemical feed pumps; - Purchase and delivery of three (3) KOP rebuild kits; - Removal of older chemical pumps and installation, start-up, and programming of replacement chemical feed pumps; - Documentation of installation to CT Department of Public Health. Task 2: Replacement of Bulk KOH Chemical Feed Line The current Potassium Hydroxide Bulk Chemical feed line at the Town’s water system treatment equipment building is in need of removal and replacement. The treatment equipment building includes chemical feed pumps and chemical day tanks along with bulk storage tanks. The current bulk storage piping has leaks and needs replacement. Aside from leaking when the tank is refilled, the rest of the fill piping is currently assessed as Scheduled 40 PVC, which presents safety and possible spill concerns. Piping should have been installed using CPVC materials. Tank vents will be piped outside the building. The new piping will use the location of the old piping, and will retain a cam and groove cap. Specific scope for Task 2 includes: - Remove existing feed line piping and replace with CPVC fittings and new pipe; and - Reattach storage tank covers. Task 3: Atmospheric Water Tank ROV Inspection and Sediment Removal Department of Public Health regulations require an inspection of all public water system atmospheric tanks every ten years. The decennial inspection of the Town of Sterling’s 400,000 gallon atmospheric water tank was due during 2021 and is now overdue. An inspection and removal of accumulated sentiment is anticipated to be accomplished by a remotely-operated vehicle (ROV), and will take place while the tank will be in service. The tank will not be drained for this inspection and sediment removal, and access for the ROV will be from the hatch located on the concrete tank. Specific scope for Task 3 includes: - Conduct, by a Certified Tank Inspector, a ROV-based inspection of the atmospheric water tank, including chlorination of all inspection equipment prior to inspection; - Removal of up to six inches (6”) of accumulated sediment from the atmospheric water tank; and - Submission of an Inspection Report to the Department of Public Health.
