NEWS RELEASE
2003-29 Massachusetts Military Reservation (MMR), Cape Cod, Mass. — The Air Force Center for Environmental Excellence (AFCEE) will hold a 14-day informal public comment period on the Chemical Spill 23 (CS-23) Remedial Investigation (RI) Work Plan. The work plan outlines the procedures that will be used to characterize the CS-23 groundwater contamination, located in the southwest corner of the MMR. The known plume area is assumed to be detached from the source area and does not discharge to any surface water bodies and does not threaten any public or private water supplies at this time. The 14-day comment period begins September 11, 2003 and ends on September 24, 2003. Copies of the CS-23 RI Work Plan will be available for review during the public comment period at the main libraries in Sandwich, Bourne, Mashpee and Falmouth, as well as at the Installation Restoration Program Office and on the web site at http://www.mmr.org.
BACKGROUND: The CS-23 plume originated from an unknown source on MMR and is currently located in the southwest corner of the MMR between three known plumes– Chemical Spill 10 (CS-10), CS-21 and Landfill 1 (LF-1). The main contaminant of concern in the CS-23 plume is trichloroethylene (TCE). TCE is a cleaning solvent that has a state and federal drinking water standard (maximum contaminant level or MCL) of 5 parts per billion (ppb). The CS-23 plume is currently defined by three monitoring wells. To date, the highest validated detection of TCE in the CS-23 plume is 52 ppb. The lateral and vertical extents of the CS-23 plume (defined by TCE concentrations greater than the MCL) are currently undefined, therefore the potential down gradient impacts from this plume are unknown.
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