Groundwater Pollution Remediation in Bethpage

under planning

The New York State Dept. of Environmental Conservation is planning to remediate the plume of groundwater pollution that has been spreading from the former Northrup and Grumman and Navy facilities in Bethpage. The project entails the installation of 24 groundwater extraction wells: eight in the interior of the plume and 16 along the margins. The extracted groundwater would be treated at five groundwater treatment plants using air stripping technology. Advanced oxidation process technology would be used for 1,4-dioxane removal, if necessary. Following treatment, water would be returned to the aquifer system using a constructed recharge basin or existing recharge basins, beneficially reused for irrigation purposes at Bethpage State Park, and/or beneficially reused to augment surface water flow in Massapequa Creek. To convey water from the extraction wells to the treatment plants and from the treatment plants to the discharge locations, about 23.5 miles of underground conveyance piping would be installed.