NORWICH – Cleanup and decontamination work which began in late October will continue throughout the winter and early spring at a former New York State Electric and Gas (NYSEG) plant, behind Front and Birdsall Streets and adjacent to the Tops parking lot.
Phase one of the cleanup will include the collection and disposal of coal tar oil and contaminated groundwater, the in-situ solidification of impacted soils and the installation of a clean soil cover, according to the New York State Department of Environmental Conservation (DEC), which ordered the cleanup in March of 2008.
The in-situ solidification process involves the utilization of a nozzle-equipped auger, which injects a cement-bentonite mixture into the ground, according to NYSEG Manager of Regional Outreach and Development James Salmon. When the mixture cures, it prevents the byproducts of outdated manufacturing gas plants from migrating or dissolving into the groundwater. This “cured” mixture can then be easily excavated using standard construction equipment should the need arise in the future, he added.