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As with any environmental tracer, age applies to the date of introduction of the chemical substance into the water, and not to the water itself.

The accuracy of the determined age depends in part on how perfectly the CFCs are transported with the water.

CFCs also can be used to trace seepage from rivers into ground-water systems, provide diagnostic tools for detection and early warning of leakage from landfills and septic tanks, and to assess susceptibility of water-supply wells to contamination from near-surface sources.We have all type of personals, Christian singles, Catholic, Jewish singles, Atheists, Republicans, Democrats, pet lovers, cute Battle Ground women, handsome Battle Ground men, single parents, gay men, and lesbians.Free online dating in Battle Ground for all ages and ethnicities, including seniors, White, Black women and Black men, Asian, Latino, Latina, and everyone else., but the accuracy of this approach has been limited by the existence of a temperature-independent component of the noble gases in ground water, termed 'excess air', whose origin and composition is poorly understood.Our model predicts previously unexplained noble-gas data sets, including the concentration of atmospheric helium, and yields consistent results for the non-atmospheric helium isotopes that are used for dating ground water.

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