Sysco Boston, LLC -- Plympton, Massachusetts
National foodservice company Sysco selected a site in Plympton, Masschusetts, to construct its new 630,000 sq. ft. distribution and warehouse facility, which has a water demand of 35,000 gallons-per-day. CHA was the design-build-operator to develop the facility's water system, which consists of two gravel-packed wells, a water treatment plant, a ground-level water storage tank, finished water pumps, and a potable water distribution system. Treated water also flows through a reduced pressure backflow preventer to a tank dedicated for fire protection.
The water treatment plant was designed and built to treat high levels of iron and manganese measured in a pre-existing well. As the design-build-operator, CHA recommended installation of a second well that had significantly better water quality. The operations plan recommends using the new well as the primary source with the pre-existing well as a backup.
The treatment plant is rated by MADEP as a Class II-T. The plant includes pre-filtered raw water chemical treatment that adds sodium or potassium permanganate to oxidize the dissolved metals, alum for coagulation, and sodium hydroxide for pH adjustment. Water is filtered by the Pall Aria AP-2 microfiltration membrane system. The filtered water is disinfected with sodium hypochlorite and stored in a 370,000 gallon tank that supplies the potable distribution system.
Services Provided by CHA:
- Existing Conditions Survey
- Site Civil Design
- Roadway Design and Permitting
- Environmental Permitting
- Drainage Design
- Design-Build Water and Wastewater