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1 <br />' MONITORING RESULTS <br />a:::~:car:.;:<::'r.:':.c.'rz-c::x::a~x~ .~::.:i::::~.a.;,.~.,o. c'v:a'xaw:xm.;.::ozanr~zza:~::::::~:a::c:...::.a:.;:s:w~ <a::tu:ta:c.:¢:s;~o~.,,.. ~o:s'.e.:::y~ .,,...,..:::ax.:n~x:~~a~w:c:e:m::x~ ~m~n~a: a:maz; u ^sna: x <br />' During 1997, quarterly surface water measurements were obtained at each of the three stations <br />' located on Stollsteimer Creek. These samplings were conducted during March, June, and <br />September. Semiannual water quality analyses were conducted during the June sampling. <br />Approval of TR-30 suspended monitoring prior to the December sampling. Well sites in the <br />' Stollsteimer Alluvium were sampled quarterly for water level and semiannually for water quality <br />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 />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 1997 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 1997 vazied from 11.22 cfs <br />at station S-1 in September to a high of 90 cfs at station S-1 in Mazch. As indicated from the flow <br />' records, 1997 was an above average water year due to higher flows encountered throughout the <br />year. <br />' Recorded flows over the thirteen year period ranged from a low of 0 cfs at station S-1 to a high <br />of 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 />' average flow, 1985 was the highest and 1989 was the lowest. Spreadsheets and graphs of flow <br />recorded at each station are presented in Appendix I. <br />' ~~® <br />' 1997.053/3/01-1698(8:17am) 4 <br />