The Lake system in Natick MA, consisting of five linked “ponds” named Fisk, South, Carling, Middle and North became a Superfund site as designated by the US Environmental Protection Agency.

The reason: Lake Cochituate was contaminated by PCBs two decades ago. In providing a comprehensive solution, Inner Space Services managed to overcome several challenges.

The contamination had occurred in the 1980s when an electrical transformer exploded nearby with the runoff entering the lake through a storm drain. Tests on fish showed dangerously high levels of PCB contamination.