Legacy Farms Onsite Wastewater Treatment including Membrane Bioreactor Treatment System

Legacy Farms Onsite Wastewater Treatment Facility

Legacy-BarnTata & Howard provided soil investigation and evaluation, preliminary design, and design services a wastewater treatment 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.