The Town of Medway, Massachusetts, selected Wright-Pierce for the design and construction administration of a new water treatment plant to remove naturally occurring iron (Fe) and manganese (Mn) from three of its groundwater wells—the Populatic Well, Oakland Well, and Village Street Well.
Senior Project Manager James Cray and Regional Group Leader Robert Williamson led this project and designed the water treatment plant for a capacity 2.12 mgd with provisions for the future addition of a per- and polyfluoroalkyl substances (PFAS) removal treatment system. With the release of the EPA treatment requirements for PFAS compounds, the design and addition of the PFAS treatment system is now in the planning stages and is expected to be added within the coming years.
As part of our PFAS treatment system design services, we have prepared and submitted the PFAS grant application to the Massachusetts Department of Environmental Protection (MassDEP). The new plant also includes an administration area large enough to accommodate 8 to 12 staff members and garage space for vehicle storage.
Treatment Design & Permitting
The Fe and Mn treatment includes chemical addition for pH adjustment, pre-oxidation, fluoridation and disinfection, direct pressure filtration for Fe and Mn removal, and backwash and residuals management with recycling of settled supernatant. The design includes backwash and residuals tankage, as well as a baffled clear well for compliance with the Groundwater Rule (4-log viral inactivation), in the building footprint below grade beneath the process floor.
Additionally, the new treatment plant houses a supervisory control and data acquisition (SCADA) system designed to monitor and control the three raw water wells, the water treatment plant, and the distribution system storage tanks. Our services also included the identification, preparation, and filing of relevant permits, including the Environmental Notifications Form, as part of the Massachusetts Environmental Policy Act (MEPA).
Construction Services
Construction of the project began in the spring of 2022 and the plant is currently awaiting MassDEP approval to be placed online. Approval is expected in mid-May 2024.
The protection of groundwater is crucial to the health and safety of communities. Please contact us today to discover how our water engineers can assist you with groundwater evaluation and protection.