NYSDEC presentation on GE Hudson Falls Remediation

Basis for TDCS• Mobile PCB oil was in the bedrock beyond thecapture zone of the existing remedial systems• The steep hydraulic gradients in the vicinity of thedam and waterfall made it difficult to interceptthe flow of PCB oil to the river• The installation of the TDCS beneath the primarybedrock horizon through which the PCB oilmigrated to the river allowed establishment ofsufficient hydraulic gradients into the TDCS