U.S. Geological Survey Middle Rio Grande Basin Study; Proceedings of the first annual workshop, Denver, Colorado, November 12-14, 1996

Abstract

Chemical concentrations (in weight-per-weight units) are reported in percent by weight (wt%), micrograms per kilogram (ug/kg), and picograms per kilogram (pg/kg), which are equivalent to parts per hundred, parts per billion (ppb), and parts per quadrillion, respectively. Chemical concentrations (in volume-per-volume units) are reported in cubic centimeters per liter (cc/L), which are equivalent to milliliters per liter (ml/L) or parts per thousand (ppt). Contents