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Brownfields Redevelopment

City of Waltham

Mabbett was retained by the City of Waltham to facilitate the conversion of a disused former railroad line to a recreational park, the proposed Chemistry Station Park, located within a dense residential area. The Site comprises an approximate one acre segment of the former Boston and Maine Railroad right-of-way which had residential homes located along both sides of the former railway. Over time, residential yards had gradually encroached into the parcel, and the parcel had been used as a dumping site for solid waste and abandoned vehicles.

Mabbett completed a preliminary environmental subsurface investigation, which detected soil concentrations of arsenic and lead above Massachusetts Department of Environmental Protection (MassDEP) residential standards. These arsenic and lead concentrations have been attributed to historic herbicide applications associated with railroad operations and/or the presence of coal and coal ash.

At the request of the City, Mabbett developed a remediation plan for the parcel, and developed engineering plans, specifications, and bidding documents for the parcel redevelopment. Mabbett oversaw the project from design, bidding, contractor selection, to construction, and project completion and closeout. Mabbett provided construction management and oversight of the contractor selected to perform the work. Additionally, Mabbett assisted with notification of residential abutters with yards that had encroached into arsenic/lead impacted areas of the Site that were targeted for remediation and redevelopment. Mabbett collaborated with the landscape architect tasked with creating the park greenspace in order to coordinate location, of planting beds and other features in areas of clean soil.