AOC K – Water Well

The water well is located next to a tree northeast of the barracks at the Public Works complex at NASD. It was used from approximately 1941 to 1979 as a potable water supply well. The well was later plugged and abandoned. 

The USGS performed a study of 14 water wells in the NASD area in 1996, including the well at AOC K. The report indicated that among the reconditioned wells, only one well (AOC K) contained CERCLA hazardous compounds. Benzene was reported at a concentration of 21 micrograms per liter (µg/L), which is above the Federal maximum contaminant level (MCL) of 5 µg/L.

The Phase II Expanded PA/SI field investigation at AOC K included the installation and sampling of two groundwater monitoring wells upgradient and three monitoring wells downgradient of the former water supply well. Iron and thallium detected in the groundwater were determined to be associated with background levels in the soil and not related to the former water supply well site. Health hazard effects are within acceptable limits for an industrial worker. No benzene was detected in any of the wells installed for the PA/SI. Therefore, the site was recommended for NFA.