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<br />' MONITORING RESULTS <br />' During 1996, 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 />and December. Semiannual water quality analyses were conducted during the June and December <br />samplings. Well sites in the Stollsteimer Alluvium were sampled quarterly for water level and <br />' semiannually for water quality during the same months as surface water. <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 checked <br />to determine the flow rate. Water quality was collected by grab samples at each station. <br />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 casing <br />volumes of water. <br />1 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 ACZ <br />' Laboratories in Steamboat Springs for analyses. Methods of analysis were consistent with EPA <br />standard testing procedures. <br />' SURFACE WATER <br />' Results of all surface water measurements made during 1985 through 1996 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 1996 varied from 0.51 cfs <br />at station S-3 in September to a high of 79.53 cfs at station S-1 in March. As indicated from the <br />flow records, 1996 was a below average water year due to the drough of late spring and early <br />' summer. <br />t Recorded flows over the twelve 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 during <br />April 1986, which was estimated at the mine haul road culvert crossing. In terms of average flow, <br />' 1985 was the highest and 1989 was the lowest. Spreadsheets and graphs of flow recorded at each <br />station are presented in Appendix I. <br />1 <br />1 <br />' 1996 OS?/J/01~?0-97(II~OSam) 4 <br />~~ o <br />