Book Description

The objective of this survey was to confirm and quantify the presence and extent of contamination at 15 sites: Drainage Ditch No. 1 and No. 2, Weapons Storage Area, Landfill No. 1, Firing Range Landfill, 8150 Landfill, Runway Landfill, Landfill No. 3, Landfill No. 2, existing Fire Protection Training Area (FPTA), FPTA No. 1 and No. 3, MOGAS Spill, Old Burial Site and Fuel Tank Sludge Burial Pit. Twenty-eight groundwater monitoring wells were drilled and installed (using air rotary with casing hammer for drilling and either PVC or steel well materials). The wells were each sampled twice and analyzed for volatile organics and other constituents. Soil samples were collected from four locations at two of the sites. Also, geophysical surveys were conducted at eight of the sites. The soil samples were not found to be contaminated. The groundwater sample analyses showed that the groundwater at 15 of the 28 wells contained the following solvents: trichloroethylene (TCE), tetrachloroethene (PCE), trans-1,2-dichloroethene (DCE), 1,2-dichloropropane. Nine wells showed concentrations exceeding state action levels. PCE was found in the northeast corner of the base and TCE was found in the northwest corner. Twelve new wells are recommended to help monitor conditions (1) upgradient of sites and (2) in deeper aquifers downgradient from sites. Additional sampling for volatile organics is required at contaminated wells.