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The GeoProducts WEN-2 well, drilled 2200 feet northwest of Wendel Hot Springs in Lassen County, California, penetrated 4330 feet (1320 meters) of Tertiary basalt flows and volcanoclastics. Production of 251/sup 0/F (122/sup 0/C) thermal fluids comes either from a fault or from intergranular permeability in a 570-foot thick quartzite conglomerate channel overlying the granitic basement rocks at a depth of 4900 feet. The chemistry, temperature and hydrostatic head of the resource in WEN-2 are very similar to that of WEN-1 to the northeast. Unknown faults in the granitic basement rocks, other than the Wendel fault, may be important channelways for the geothermal system. 4 refs., 3 figs.

Per Groundwater Protection EIS commitments, a baseline of surface water hydrology and chemistry of each onsite stream is needed to define the existing environment of each watershed so that environmental impacts associated with the various waste site closure options can be assessed. This report summarizes the existing water quality of the Savannah River; lists the various waste sites encompassing this watershed; and summarizes the availability of surface water and floodplain sediment monitoring data, both radiochemical and physiochemical, collected from this watershed.