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<br />f)f" t"'\o0\( <br />~ ~ , <br /> <br />in April 1996, daily total precipitation. Quality data <br />consist of analytical results for chemical and sus- <br />pended-sediment samples. The USGS collected data <br />at 16 surface-water gaging stations at the Site (fig. I) <br />during water year 1996. Water year 1996 began <br />October I, 1995, and ended September 30, 1996. <br />Surface-water quantity data can be used by the <br />DOE and the operating contractor for making water- <br />management decisions at the Site throughout the year. <br />Surface-water quality data can be used by the DOE and <br />the operating contractor to characterize and evaluate <br />the quality of water flowing across the Site.. <br /> <br /> <br />Surface-Water Quantity and Quality Data, Rocky <br />Flats Environmental Technology Site Near Denver, <br />Colorado, Water Year 1996 <br /> <br />By Mark E. Smith, John W. Unruh, and Clayton H. Thompson <br /> <br />ABSTRACT <br /> <br />Collection of surface-water quantity and <br />quality data at the Rocky Flats Environmental <br />Technology Site is needed as part of the ongoing <br />environmental cleanup of the facility, which is <br />owned by the U.S. Department of Energy and <br />operated by a private contractor. In May 1993, <br />the U.S. Geological Survey, in cooperation with <br />the U.S. Department of Energy, began a study to <br />collect surface-water quantity (daily mean dis- <br />charge and daily total precipitation) and quality <br />(chemical and suspended-sediment) data at the <br />Rocky Flats Environmental Technology Site. <br />This report presents data collected at 16 surface- <br />water gaging stations during water year 1996. <br /> <br />INTRODUCTION <br /> <br />The Rocky Flats Environmental Technology <br />Site (hereinafter, the Site) is a former production facil- <br />ity for nuclear-weapons components. The Site is <br />owned by the U.S. Department of Energy (DOE) <br />and operated by a private contractor (Kaiser-Hill <br />Company, L.L.C.). Production of nuclear-weapons <br />components was discontinued in 1992, and environ- <br />mental cleanup and restoration of the Site was begun. <br />Collection of surface-water quantity and quality data <br />is needed as part of ongoing cleanup operations. <br />In May 1993, the U.S. Geological Survey <br />(USGS), in cooperation with the DOE, began collect- <br />ing surface-water quantity and quality data at the Site. <br />The USGS also operated and maintained the surface- <br />water gaging stations used for data collection. Quan- <br />tity data consist of daily mean discharge and, beginning <br /> <br />Purpose and Scope <br /> <br />This report presents surface-water hydrologic <br />data collected by the USGS at the Site during water <br />year 1996. These data include daily mean discharge, <br />daily total precipitation, and the analytical results of <br />water-quality and suspended-sediment samples col- <br />lected at 16 surface-water gaging stations. Summary <br />tables of the data collected at the Site are presented, <br />but no interpretation of the data is provided beyond a <br />qualitative rating of record quality (good, fair, or <br />poor). <br /> <br />Description of the Study Area <br /> <br />The Site is situated on about 6,550 acres in <br />northern Jefferson County, about 16 mi northwest of <br />Denver, Colorado. Industrial facilities occupy about <br />384 acres near the center of the Site, and the remaining <br />area serves as a buffer zone between these facilities and <br />the Site boundary (EG&G Rocky Flats, Incorporated, <br /> <br />Abstract 1 <br />