Meadow Walk Mixed-Use Wastewater Design / Engineering Services

Design / Engineering Documentation for MBR Wastewater Treatment Facility for Mixed-Use Development in Sudbury, Massachusetts

Tata & Howard has been providing engineering services for final design and construction documents associated with the design of a wastewater treatment facility utilizing membrane bioreactor (MBR) technology for the 50-acre Meadow Walk development at 526-528 Boston Post Road in Sudbury, Massachusetts. The site is a former Raytheon engineering and R&D facility.

National Development / Avalon Bay mixed-use residential and retail development, Boston Post Road, Sudbury, MA.

Believing the site was well-suited for mixed-use residential and retail development, in 2016 Sudbury selectmen and residents voted to approve zoning and development plans proposed by National Development and Avalon Bay. The site was in development for two years and is nearing completion. The project consists of several independent components, which collectively comprise a mixed-use development with new open space, retail, and restaurants as well as walkable access to adjacent retail, office, and other services along Boston Post Road. The project also included local roadway improvements, major upgrades to the streetscape and landscaping, wastewater treatment improvements, and improved water quality.

Tata & Howard was contacted initially to prepare studies of existing conditions and proposed modifications to enhance and then upgrade the wastewater facility and disposal area on the site. Additional out-of-scope changes included value engineered alternatives and additional design services. The existing wastewater treatment facility was over 25 years old and required increased discharge limits; conversion to an MBR system to achieve higher removal of BOD, TSS, TN, turbidity, and other wastewater constituents; additional treatment redundancy; upgrades to meet current Massachusetts Department of Environmental Protection (MassDEP) guidelines; increased groundwater recharge; odor control; replacement of old infrastructure with a new pump station, gravity lines, and force main; a change to mixed land/water use to result in wastewater generation that could be more efficiently treated at the new wastewater treatment facility; and a new leaching field.

Upgrades included infrastructure and a new leaching field.

Onsite Wastewater Treatment Facility, Hopkinton, MA

Private Sector — Legacy Farms, Hopkinton, MA

Current Project

Legacy_collage_leachfield_MSB_915v3Tata & Howard is providing design and construction administration services associated with expansion of the Legacy Farms private wastewater treatment facility and effluent disposal areas from 115,000 gallons per day (gpd) to 190,000 gpd, which consists of the installation of additional membrane cassettes to increase the capacity from 115,000 gpd to 150,000 gpd, installation of additional membrane modules, installation of mechanical equipment fully redundant at a maximum daily flow of 190,000 gpd, permitting assistance with MassDEP, and the construction of two additional effluent disposal areas. Construction of the first of two new effluent disposal areas is underway, and T&H Project Engineer and Certified Soil Evaluator Matt Barry was recently on-site to conduct a perc test for the second effluent disposal area.

Original Project

HopkintonMA_LegacyFarms_layoutTata & Howard provided soil investigation and evaluation, preliminary design, and design services for an onsite wastewater treatment facility and disposal system to serve the proposed Legacy Farms mixed-use development in Hopkinton, Massachusetts.

The Legacy Farms development includes a retail village, a commercial district, a variety of residential spaces (apartments, town homes, single-family homes, and multi-family structures) on approximately 733 acres currently used for nursery and agricultural uses. Approximately 940 new dwellings, 450,000 square feet of retail and commercial space, and 500 acres of restored open space will be made available by the project.

Tata & Howard’s services have included development of treatment flows for the full, built-out project, as well as selection and design of the wastewater pumping treatment and disposal systems that were compatible for the site configuration and soils, and that would provide the level of treatment required by the Massachusetts Department of Environmental Protection (MassDEP).  The challenge was satisfied by the design for a phased approach to the construction of a membrane bioreactor (MBR) treatment system, which provides a high level of treatment.

The project includes three submersible pump stations that serve the wastewater treatment facility (influent, recirculation, and effluent disposal) and two submersible pump stations within the development itself.

Disposal of treated effluent at the Legacy Farms site will be managed by a combination of conventional leaching systems and an innovative use of drip irrigation, the first large-scale application of drip irrigation for disposal of treated effluent in the State of Massachusetts.

The success of this project was related to excellent communication between Tata & Howard and the client, and a strong working relationship with MassDEP.