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GROUND-WATER DATA-COLLECTION PROTOCOLS AND PROCEDURES FOR THE NATIONAL WATER-QUALITY ASSESSMENT PROGRAM: SELECTION, INSTALLATION, AND DOCUMENTATION OF WELLS, AND COLLECTION OF RELATED DATA By Wayne W. Lapham, Franceska D. Wilde, and Michael T. Koterba ABSTRACT Protocols for well installation and documentation are included in a 1989 report written for the National Water-Quality Assessment (NAWQA) Pilot Program of the U.S. Geological Survey (USGS). These protocols were reviewed and revised to address the needs of the full- scale implementation of the NAWQA Program that began in 1991. This report, which is a col- laborative effort between the National Water-Quality Assessment Program and the Office of Water Quality, is the result of that review and revision. This report describes protocols and recommended procedures for the collection of data from wells for the NAWQA Program. Protocols and procedures discussed are well selection, installation of monitoring wells, documentation, and the collection of water level and addition- al hydrogeologic and geologic data. INTRODUCTION Although the report Well Installation and Documentation, and Ground-Water Sampling Protocols for the Pilot National Water-Quality Assessment Program (Hardy and others, 1989) was developed for the National Water-Quality Assessment (NAWQA) Pilot Program, it has been circulated widely within the U.S. Geological Survey (USGS). The full-scale implemen- tation of the NAWQA Program in 1991 required updating of the NAWQA Pilot Program pro- tocols (Hardy and others, 1989) and more detailed information on recommended procedures for collecting data for the ground-water component of the NAWQA Program. There also has been a need for a broader based report that establishes and documents water-resources data- collection protocols and procedures for the entire USGS. These needs have resulted in collab- oration between the Office of Water Quality and the NAWQA Program to produce two com- panion reports.l This report describes protocols and recommended procedures for the selection, installa- tion, and documentation of wells and collection of hydrogeologic and geologic data for the full-scale NAWQA Program. The planned companion report will be a broader based reference for the collection of ground-water-quality data throughout the USGS. In addition to updating and expanding the report by Hardy and others (1989), this report complements other reports, including those that describe NAWQA protocols for the collection of ground-water-quality 'For further information about the status of these planned reports contact the Office of Water Quality, U.S. Geological Survey, 412 National Center, Reston, VA 22092.