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Pacific EcoRisk Environmental Consulting and Testing <br />3. RESULTS <br />3.1 Effects of the Waste Sample Soil-la on Fathead Minnows <br />The results of this test are summarized in Table 1. The LCso of this sample was >750 mg/L, <br />which is greater than the hazardous waste classification threshold of 500 mg/L, as defined by CA <br />Title 22 CCR §66261.24. Accordingly, the sample should not be considered a hazardous waste <br />with respect to acute aquatic toxicity. The test data and summary of statistics for this test are <br />presented in Appendix B. <br />Table 1. Results of the hazardous waste acute toxicity evaluation of Soil- 1 a. <br />Waste Sample Treatment Level Mean % Survival <br />Lab Water Control 100 <br />250 mg/L 95 <br />400 mg/L 90 <br />500 mg/L 100 <br />600 mg/L 100 <br />750 mg/L 100 <br />Summary of Statistic <br />LCso = >750 mg/La <br />a - Due to the absence of significant mortalities, the LCso cannot be calculated, but can be determined by inspection <br />to be >750 mg/L. <br />Page 3 <br />6/15