TABLE 1.

Groundwater chemistry of contaminated and background subsurface sitesa

SampleUranium(VI) (ug/liter)Nitrate (mM)pH
GW3000.002557.6
GW20122NA5.2
GW191550.1527.0
GW3099.73.8
GW321.00 × 10311.85.4
  • a Background groundwater is sample number GW300, and contaminated groundwater samples are sample numbers GW20, GW19, GW30, and GW32. Data are averages of duplicate samples. —, concentration below the detection limit. NA, no data.