by Daniel T. Chafin
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Methane-concentration and methane-isotop...
Ground-water geochemistry of the near-su...
Evaluation of trends in pH in the Yampa ...
Effect of the Paradox Valley Unit on the...
Hydrogeology of the alluvial aquifers at...
Migration and geochemical evolution of g...
Superfund
Environmental protection
Grand Staircase-Escalante National Monum...
Site selection process
Water resources