PUBLICATIONS--"Quality Assurance Practices for the Chemical and Biological Analyses of Water and Fluvial Sediments," Techniques of Water Resources Investigations (TWRI) Book 5, Chapter A6 In Reply Refer To: April 26, 1983 EGS-Mail Stop 412 QUALITY OF WATER BRANCH TECHNICAL MEMORANDUM NO. 83.13 Subject: PUBLICATIONS--"Quality Assurance Practices for the Chemical and Biological Analyses of Water and Fluvial Sediments," Techniques of Water Resources Investigations (TWRI) Book 5, Chapter A6 This memorandum announces the availablility of the subject report by Linda C. Friedman and David E. Erdmann. A limited distribution of the TWRI was made several weeks ago. Additional copies are available from the Branch of Distribution, U.S. Geological Survey, 604 South Pickett Street, Alexandria, Virginia 22304. This manual is intended for use by anyone involved either in planning the acquisition of water-quality data, in actually acquiring the data, or in evaluating the data. It should be a convenient reference for the District manager, project leader, field technician, and laboratory analyst. R. J. Pickering WRD Distribution: A, B, S, FO, PO Key Words: water quality, quality assurance This memorandum does not supersede any previous memorandum.