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Wyoming Fuel, 8505-087-094 <br />3.0 RESULTS AHD DISCUSSION <br />Ceriodaohnie ep. mortality ranged from O percent in the < 50 <br />percent effluent treatment groups to 45 percent in the 100 <br />percent effluent treatment group (Table 3-1). Therefore, the 48- <br />hour LC50 vas > 100 percent effluent (Table 3-2). No control <br />mortality was observed during the teat. The acute NOEC vas 100 <br />percent effluent. During the test ell chemical parameters were <br />within acceptable limits (Appendix A). Dissolved oxygen <br />concentrations remained > 6.1 mg/L (80 percent of saturation et <br />4,800 feet elevation above see level). Teat temperature was <br />maintained at 20-21 C and pH ranged from 8.2-9. 1. <br />The 24-hour LC50 for the reference toxicant test was 13.1 <br />mg/L sodium dodecyl sulfate as calculated by the binomial method. <br />ERT's acceptable range for < 24-hour old Ceriodaohnie ep. is 2.3- <br />20.0 mg/L sodium dodecyl sulfate. Therefore, the test organisms <br />were within the designated sensitivity range. <br />9 <br />