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November 1998 Monthly Report <br /> Page 3 <br /> treatment (CC-1B) ; American Tunnel flow before treatment <br /> (AT-INFEL) ; and Cement Creek below the AT-004 discharge <br /> point (CC-20)had not been received by the date of this <br /> report. They will be included with the December report. <br /> - Mainstem Stream Monitoring and Reference Point Stream <br /> Monitoring <br /> Sunnyside sampled the reference point (A-72) on November <br /> 101, 1998. The Bureau of Reclamation sampled the mainstem <br /> gaging stations (A68, M34, and C48) during November. The <br /> results from Sunnyside's A-72 sample are attached. <br /> The provisional flow on November 10, 1998 at A-72 was 129 <br /> cfs which places this sample result in the intermediate <br /> flow category (100 cfs < Q < 300 cfs) . Ice in the channel <br /> may have the influenced the flow reading giving a higher <br /> value than actual but the flow was greater than 100 cfs so <br /> the sample would still be in the intermediate category. <br /> The dissolved zinc value for this sample obtained by <br /> averaging the results from two labs was 528 ug/l. <br /> The index number for the November sample is calculated as <br /> follows: <br /> Xi= 528 <br /> Xc= 399 <br /> Sf= 144 <br /> Ni= (Xi - Xf) /Sf <br /> Ni= (528 - 399) /144 <br /> Ni= +0. 089 <br /> The index number graph and updated reporting table are <br /> attached. <br />