Erratum for Water-Resources Investigations Report 93-4226 Steve A. Longsworth Geohydrology and Water Chemistry of Abandoned Uranium Mines and Radiochemistry of Spoil-Material Leachate, Monument Valley and Cameron Areas, Arizona and Utah ----------------------------------------------------- Posted online ca. 2011 Initial release in paper form: 1994 ----------------------------------------------------- June 2016 In the second paragraph on page V, the statement "Radioactivity is expressed in picocuries per liter (pCi/L), which is the amount of radioactive decay producing 2.2 disintegrations per second in a unit volume (liter) of water" is incorrect. The correct rate is 2.2 disintegrations per minute. We apologize for any inconvenience this error may have caused.