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State Rea. <br />Each Of the June 'iDS values m~ac~ired at Site 13 durir-g the 1987 <br />thrax~ 1990 water years have exceeded the predicted June mavimynn of <br />497 mg/1; only the 1991 water year ZDS value was below 497 mq/1. As <br />with the July meastu~nents discussed above, these exoeedenoes caruiot <br />be attributed to the effects of mining since neither Cow Camp Creek <br />nor Bond Creek were discharging to Fish Creek when the high ZD6 <br />values were renotded at Site 13 during June. Cv+r Camp Creek aryl Bond <br />Creek were discha~.~ginq to Fish Creek when a 7.DS level of 344 mg/1 was <br />moac~ired at Site 13 on 6/11/91, which was below the predicted ma~riimim <br />of 497 mg/1. <br />In stm¢nary, the results of monitoring in the Fish Creek basin show <br />that BOnd Creek and Cvt Creek will discharge to Fish Creek only when <br />low ZDS conditions exist in Fish Creek (i.e., during May, and <br />possibly during June and July if above-average precipitation causes <br />flow rates to be higher). 'ihe monitoring record thus far also <br />indicates that the maximum 4US predictions for Fish Creek during June <br />• and July (497 mg/1 and 607 mg/1, respectively) will not be exceeded <br />due to discharges from Bowl Creek and/or Cow Camp Creek. <br />C. Cow Cam Creek and Bond Creek Alluvial Aquifer Characteristics <br />Aquifer testing has been conducted at three wells cong~leted in the <br />alluvial aquifers of Cow C~ Creek and Bond Creek since the Seneca <br />II Mine permit renewal application wa s sulinitted in 1986. 'Ihe <br />purpose of this section is to review arxi summarize the aquifer <br />characteristics of the Cow Cam Cree k and Bond Creek alluvial <br />aquifers as deror,n;rur] by the testing of these wells. <br />Slug tests (Cooper et al., 1967) and bailer tPSts (5kibitzke, 1963) <br />were used to determine the aquifer characteristics of the alluvial <br />aquifers. the slug test technique involves matching graphs of <br />drawdown/recovery data against theoretical type curves, and <br />analytical solutions are used to determine aquifer characteristics <br />from bailer test data. <br />• <br />7-330 Revised 08/20/93 <br />