Multilaboratory quality control report for the hydrogeochemical and stream sediment reconnaissance. Final report

Quality control batches of water and sediment samples were sent to four participating laboratories the first of every month: Los Alamos Scientific Laboratories (LASL), Lawrence Livermore Laboratory (LLL), Oak Ridge National Laboratory (ORNL), and Savannah River Laboratory (SRL). These four laboratories were designated to conduct extensive field surveys for locating potential uranium deposits in this country and in the process expected to collect and process nearly a million and a half water and stream sediment samples. Control charts of all determinations reported to AL are included in this final report along with histograms of monthly statistics for each laboratory. Figures of interlaboratory comparison of aggregate means of each control batch are included as an overview of the performance of each laboratory over the lifetime of the program