A. Improved Pumping Capacity The SEPZ booster pump station currently has two (2), 60 horsepower, vertical centrifugal booster pumps that are each rated at 1565 gallons per minute at 80 feet of total dynamic head. Both pumps utilize VFDs. City operations staff have reported that at least one pump runs constantly to fill the Page Road EST, and during periods of high demand both pumps must run constantly to fill the Page Road EST. A third pump slot was included in the original construction of Angier Tank and pump station (Photo 1). The Department would like to increase the firm capacity of the pump station, reduce the overall pump run time and reduce the run time on any individual pump. The selected consultant shall review past modeling reports and provide alternatives for sizing an additional booster pump with a VFD. The PER shall include recommended alternative(s) to include all associated mechanical, electrical, and instrumentation. SCADA upgrades necessary for a fully functional and cohesive system including updating Operator Interface Terminals (OIT) and Programmable Logic Controller (PLC) programming to be consistent with other facility applications shall be included in the evaluation. The selected consultant will coordinate with the City’s On-Call SCADA Integrator. The consultant shall also determine future capacity needs and outline future pumping improvement projects to meet the projected capacity. The City recently attempted to purchase a spare pump but learned the manufacturer no longer produces the currently installed model. Available replacement pumps from the original manufacturer would require changes to the existing piping and pad. Therefore, the selected consultant will also evaluate options for existing pump replacements that will allow for a spare pump to be installed without significant piping or structural modifications. B. Pressure Gauge on the 24-inch Discharge Water Main The 24-inch water main on the discharge side of the booster pumps has an analog pressure gauge. The Department wants this pressure gauge to be upgraded to a digital pressure gauge that can communicate with SCADA. The selected consultant shall propose a digital pressure gauge and work with the City’s On-Call SCADA Integrator to ensure SCADA communication. C. Electrical Equipment Evaluation The electrical components at Angier Tank and SEPZ booster pump station are due for a condition assessment and evaluation. There is a motor control center (MCC) with two (2) VFDs, and feeds to the lighting transformer and jib crane. An automatic transfer switch supplies the transformer with either utility power or generator power from a 150 kW diesel generator. The Department wants to ensure the current electrical equipment is in good condition and appropriately sized for the upgrades outlined in this RFQ. The selected consultant shall inspect the electrical gear and provide recommendations for rehabilitation, repair, and/or necessary equipment for the upgrades. This includes the standby generator condition and sizing. A photo of the existing electrical gear is provided below (Photo 2).
