Specifications include, but are not limited to: The purpose of this request for proposal (RFP) is to solicit proposals from qualified engineering firms to perform engineering services relating to low-lift service pumps located at the Independence Water Treatment Plant. There are three Low Service Pumps at the Water Treatment Plant. These pumps are used to pull water from the Verdigris and into the plant for treatment. The nominal capacity of these three pumps are 4 million gallons per day (MGD), 3 MGD, and 2MGD. The largest volume pump (4MGD) is controlled using a variable frequency drive (VFD). This allows the rotation of the pump to vary so that the pump can match the rate of water production. Only one pump has this ability, and it is the most used pump. The other pumps do not have VFDs and are either on at full capacity or off. This leads to an inconsistent water flow which, though manageable since the plant operated without VFDs for decades, is one additional variable in plant operations. Additionally, having each of the three pumps with a capacity sufficient to cover the flow range anticipated by the plant would provide greater redundancy, and the ability to upgrade the existing 2MGD pump to a higher capacity through upgrades (motor, impeller, etc.) or replacement will also be studied. The awardee should perform a comprehensive condition assessment of all systems required to support the replacement or upgrade of one of the existing low-lift service pumps including all related systems (electrical, control, mechanical, hydraulic, cooling, sealing, safety, and monitoring systems). The replacement pump should be substantially similar to an existing, installed pump, and the City has substantial information on the desired pump. The awardee should also provide an evaluation of the pump and relevant systems for the implementation and installation of a variable-frequency drive (VFD). The results shall be submitted to the City in a report detailing the current pump performance, existing condition deficiencies, recommended immediate improvements (if any exist), cost of replacement of the pump, and the cost of installation of a variable-frequency drive (VFD) followed by a complete design package suitable for bidding. Factors such as peak demand, flow rate variations, pressure requirements, compatibility and interoperability with current systems, energy efficiency, reliability and maintenance, operational safety, instillation and downtime, and regulatory compliance should all be considered when evaluating replacement pump options.
