Report of analyses for light hydrocarbons in ground water

This report contains on microfiche the results of analyses for methane, ethane, propane, and butane in 11,659 ground water samples collected in 47 western and three eastern 10 x 20 quadrangles of the National Topographic Map Series (Figures 1 and 2), along with a brief description of the analytical technique used and some simple, descriptive statistics. The ground water samples were collected as part of the National Uranium Resource Evaluation (NURE) hydrogeochemical and stream sediment reconnaissance. Further information on the ground water samples can be obtained by consulting the NURE data reports for the individual quadrangles. This information includes (1) measurements characterizing water samples (pH, conductivity, and alkalinity), (2) physical measurements, where applicable (water temperature, well description, and other measurements), and (3) elemental analyses