Aquifer Susceptibility in Virginia: Data on Chemical and Isotopic Composition, Recharge Temperature, and Apparent Age of Water from Wells and Springs, 1998-2000
GEOLOGICAL SURVEY WASHINGTON DC
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The determination of aquifer susceptibility to contamination from near-surface sources by the use of ground-water dating techniques is a critical part of Virginias Source Water Assessment Program. As part of the Virginia Aquifer Susceptibility study, water samples were collected between 1998 and 2000 from 145 wells and 6 springs in various hydrogeologic settings across the Commonwealth. Samples were analyzed to determine water chemistry including nitrate NO3, dissolved organic carbon DOC, and radon-222 222Rn, major dissolved and noble gases nitrogen N2, argon Ar, oxygen O2, carbon dioxide CO2, methane CH4, helium He, and neon Ne, environmental tracers-chlorofluorocarbons CFCs, sulfur hexafluoride SF6, tritium 3H, and tritiumhelium-3 3H3He, carbon isotopes carbon-14 14C and carbon-13 delta13C, and stable isotopes of oxygen delta18O and hydrogen delta2H. The chemical and isotopic composition, recharge temperatures, and apparent ages of these water samples are presented in this report. Data collected between 1999 and 2000 from 18 wells in Virginia as part of two other studies by the U.S. Geological Survey also are presented. Most of the sites sampled serve as public water supplies and are included in the comprehensive Source Water Assessment Program for the Commonwealth.
- Water Pollution and Control