1. The principal aquifer at K.I. Sawyer Air Force Base is sand and gravel units in the glacial deposits that overlie bedrock. Saturated thickness of this aquifer averages about 135 feet. In the eastern part of the Base, clay interfingers with the sand and gravel and divides the aquifer into upper and lower units. Ground water flows toward Silver Lead Creek from the southeast and northwest
2. Two ground-water-flow models were used to improve understanding ground-water flow at the Base. The first model, which extends to ground-water divides and surface-water features just beyond the Base boundaries, was used to evaluate a hypothetical purge system for trichloroethylene and benzene plumes in the central part of the Base. A second ground-water-flow model of the bulk-fuel storage area was developed to study flow of ground water in that area. This second model was used in conjunction with the first model to evaluate the effects of a hypothetical purge system in the bulk-fuel storage area.
Grannemann, N. G., and Cummings, T. R., 1987, Installation Restoration Program, Phase II, Confirmation/Quantification, Stage 1, Hydrogeology of K. I. Sawyer Air Force Base, Michigan: U.S. Geological Survey Administrative Report.
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