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1 <br />VI. QUALITY ASSURANCE <br />Three duplicate samples were collected during 1991 for laboratory quality <br />' assurance purposes. The duplicate samples were taken at surface water <br />monitoring sites TR-C in May and July, and at TR-A in October (sample date in <br />Appendix II with an•* indicates a duplicate sample). Results of the duplicate <br />' analyses were favorable for most of the parameters tested. The duplicate TR-C <br />samples for May and July showed 10 of 11 and seven of 11 parameters, <br />respectively, to be within an acceptable range of the original values <br />obtained. For TR-A's duplicate sample, this ratio was eight of 11. The <br />1 quality assurance program will be continued during the 1992 report period. <br />' VII. SPRING AND SEEP SURVEY <br />A survey was conducted on May 21, 1991 to located springs and seeps which <br />' may be developing at the base of the ridge along Trout Creek from the north <br />Moffat boundary to the base of West Ridge. A total of 10 springs and 24 seeps <br />' were located as a result of the survey (see enclosed map). Only one spring <br />had sufficient flow to be of interest. That spring is currently monitored on <br />a regular basis and is designated as NPDES discharge point No. 006. <br />VIII. MOSFAT STABILITY <br />eour wells were installed in 1989 to monitor the ground water levels over <br />' time. Elevations of the water in the Moffat wells are shown in Figure 16 with <br />the data contained in Appendix II. Water levels in the Moffat area have <br />stabilized over the previous years. The data suggests that groundwater levels <br />' are stable with recharge approximating discharge. Continued monitoring of the <br />existing wells and the installation of spoil wells will provide additional <br />' information concerning the site stability. <br /> <br />1 <br /> <br />1 <br />