Following closure of this former manufactured gas plant (MGP) which had operated between 1881-1953, residual coal tar byproducts were identified within the Site’s soils and shallow groundwater. As a sub consultant to the firm that had delineated the contamination, GZA developed a remedial approach that was funded by an EPA Revolving Loan Fund and the former private owner of the property.


GZA was tasked with developing a cost-effective remedial approach that also incorporated the community’s plans to redevelop the property into a park to serve as a hub for the town’s trail system.


GZA consolidated contaminated soil in the center of the site beneath a geosynthetic cap—eliminating the costly transport of contaminated material offsite. This solution minimized the cap’s footprint, elevated a portion of the property above the flood plain to create recreational space and walking trails, and incorporated a rain garden to control and infiltrate storm water.

GZA’s strong construction management—including proactive communication with the client and stakeholders such as local and state agencies, contractors, subcontractors, and equipment and material suppliers—overcame environmental, schedule, and materials challenges to deliver the project within its limited budget.


A smart and cost-saving remedial design, coupled with GZA’s hands-on approach during construction to anticipate and avoid project delays, was instrumental in realizing the goals of the City and other stakeholders.