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1 <br /> <br />I I. htroductio^ <br />The purpose of this report is to provide updated information on the <br />on-going hydrologic monitoring program developed for the Edna Mine and discuss <br />trends in surface and ground water quality which have become evident over the <br />previous six years. The previous report, dated March 1985, reported <br />' monitoring activities up through the end of 1984. This report includes data <br />gathered from the period beginning in October, 1981 through September, 1987, <br />except for surface water quality information along Oak Creek which also <br />includes data from 1981. <br />The report is divided into several sections including: Hydrologic <br />Monitoring Network, Surface Water, Ground Water, Surface Water - Ground water <br />Interactions, and Crop Productivity. A compilation of the raw data is <br />provided in the appendix. <br /> <br /> <br /> <br /> <br /> <br />1 <br /> <br /> <br />_J <br /> <br />