Report Number: 2
Year: 1977

Groundwater Analysis by Tritium Technique: A Preliminary Evaluation

Water samples representing basal, parabasal, basal spring, and perched water in limestone in the northern Guam and volcanic groundwater in southern Guam were collected, analyzed, evaluated, and interpreted in terms of tritium and selected geochemical water quality parameters in 1976. The groundwater age was determined to be very young, about five or less years old, and readily rechargeable by contemporary rain water. There was a discernible gradation in the tritium level and chemical quality of the water samples. The study findings agree well with and augment current groundwater hydrologic knowledge and suggest prospects for possible additional water yield for several locations.

John F. Mink
Stephen L. Lau