USGS Open-File Report 92-495
Quality Assurance/Quality Control Manual
Jeffrey W. Pritt and Jon W. Raese
1992
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 (1992) used in the Laboratory.
VIEW the report. (pdf)

