Quality-control practices are established for the operation of the U.S. Geological Survey's National Water Quality Laboratory. These practices specify how samples are preserved, shipped, and analyzed in the Laboratory. This manual documents the practices that are currently (1995) used in the Laboratory.
Additional publication details
USGS Numbered Series
Quality assurance/quality control manual; National Water Quality Laboratory
U.S. Geological Survey :
Open-File Reports Section, ESIC [distributor],