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qqs L_apho"M' Wavnc a) et ifl <br />GROUND-WATER DATA-COLLECTION PROTOCOLS AND PROCEDURES <br />FOR THE NATIONAL WATER-QUALITY ASSESSMENT PROGRAM: <br />SELECTION, INSTALLATION, AND DOCUMENTATION OF WELLS, <br />AND COLLECTION OF RELATED DATA <br />U.S. GEOLOGICAL SURVEY <br />Open-File Report 95-398 <br /> <br />NATIONAL WATER-QUALITY ASSESSMENT PROGRAM <br />a <br />National Water-Quality Assessment Study Unit