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J MONITORING RESULTS <br />I During 1994, quarterly surface water measurements were obtained at each of the three stations <br />located on Stollsteimer Creek. These samplings were conducted during March, June, September <br />1 and December. Semiannual water quality analyses were conducted during the June and <br />December samplings. Well sites in the Stollsteimer Alluvium were sampled following their <br />installation in August 1993. <br />METHODS <br />During visits to each station, flow measurements were made by stretching a 100 foot tape across <br />a surveyed cross-section of the creek and checking cross-section depth. Velocity was also <br />checked to determine the flow rate. Crest gauges, which were established at each station during <br />1986, were also serviced during each visit to the site. Water quality was collected by grab <br />samples at each station. <br />1 Depth to water was measured in groundwater wells to the nearest hundredth of a foot using an <br />electric line. Groundwater samples were collected with a hand bailer after evacuating three <br />casing volumes of water. <br />During samplings for water quality, temperature was measured in the field with a hand <br />thermometer. All other parameters were collected in precharged bottles and submitted to <br />Chemtech Laboratory in Salt Lake City for analyses. Methods of analysis were consistent with <br />EPA standard testing procedures. <br />J SURFACE WATER <br />1 Results of all surface water measurements made during 1985 through 1994 are contained in <br />Appendix 1. A summary of major chemical parameters and flow is presented in Table 1. <br />Flow data collected at the surface stations on Stollsteimer Creek during 1994 varied from 0.3 cfs <br />at station S-1 in December to a high of 97 cfs at station S-2 in March. As indicated from the <br />flow records, 1994 was a typical water year with high flows in the spring and early summer and <br />low flows during fall and winter. <br />I Recorded flows over the ten year period ranged from a low of 0 cfs at station S-1 to a high of <br />195 cfs at station S-1 in March 1985. Maximum recorded flow was approximately 300 cfs <br />during April 1986, which was estimated at the mine haul road culvert crossing. In terms of <br />1 average flow, 1985 was the highest and 1989 was the lowest. Flows measured in June 1994 <br />were higher than those measured over the past several years due to the storms received during <br />that period. Spreadsheets and graphs of flow recorded at each station are presented th <br />' Appendix I. <br />' R_'.053/3/01-27A5(1:16pm1 4 <br />