As the Nation's principal earth-science information agency, the U.S. Geological Survey (USGS) is depended upon to collect data of the highest quality. This document provides the framework for collecting, analyzing and reporting ground-water data that are quality assured and quality controlled.
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USGS Numbered Series
A quality-assurance plan for district ground-water activities of the U.S. Geological Survey
U.S. Geological Survey, WRD ;
U.S. Geological Survey, Branch of Information Services [distributor],