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Targeted Brownfield Assessment & Cleanup of Former Manufactured Gas Plant Site, 260 River Street, Montpelier, Vermont

In the Spring of 2017, Stone was retained by 260 River Corporation, LLC to perform a Phase II Environmental Site Assessment (ESA) of a property in Montpelier, Vermont formerly operated as a Manufactured Gas Plant (MGP) between 1902 and 1949. Funding was provided, in part, by a Section 128A State and Tribal Assessment and Cleanup Grant administered by the Vermont Department of Environmental Conservation (Vermont DEC) and private funding. Former MGP operations at the Site resulted in releases and improper disposal of coal gasification wastes, most notably coal tar. Coal tar was released to the subsurface from gasometers, a tar well, purifiers, and other gas works infrastructure and was released directly onto the bank of the Winooski River, which adjoins the site. These historic site practices have resulted in soil, groundwater, sediment, and surface water contamination that require corrective actions to remediate unacceptable risks to human health and the environment.

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