Quincy Point Pump Station Evaluation & Design
In 2012, Weston & Sampson was contracted by the City of Quincy to evaluate the Quincy Point Pump Station, which was showing signs of age and deterioration. The wastewater pump station is rated for approximately 7 million gallons per day of flow and was originally installed in the early 1970s and upgraded in the mid-1980s to include three 100-HP two-speed centrifugal pumps. Weston & Sampson evaluated the architectural, structural, mechanical, HVAC, and electrical components of the pump station. In 2013 and 2014, Weston & Sampson also evaluated the condition of the approximately 2-mile long 20-inch ductile iron force main. The Phase 1 evaluation of the force main included non-destructive ultrasonic gauge testing at the pump station and at the four air release manholes. The Phase 2 evaluation included both non-destructive ultrasonic thickness gauge testing and pipe “coupon” samples at seven locations along the force main route. Reports on the evaluations of the pump station and force main, and associated recommendations, were provided to the City of Quincy.
Late in 2014, Weston & Sampson was selected by the city to design comprehensive improvements to the Quincy Point Pump Station. The design includes full upgrade of the pump station including structural, architectural, mechanical, HVAC, plumbing and electrical/instrumentation improvements. The design was completed in the spring of 2015, and construction was substantially complete in 2016.
The mechanical design improvements include the replacement of the three 100-HP two speed pumps with new 125-HP pumps controlled by VFDs. Mechanical design improvements also include channel grinder replacement, wetwell mixing improvements to reduce accumulation of fats, oils and grease on the water surface, and odor control improvements utilizing granular activated carbon.
Electrical and instrumentation design improvements include the replacement of all motor control centers, incorporation of a new SCADA PLC into the station and a new standby generator. HVAC improvements include the replacement of all make-up air units and the incorporation of an energy recovery ventilator into the project.