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Pacific EcoRisk Environmental Consulting &Testing <br /> 3. RESULTS <br /> 3.1 Effects of the Waste Sample "S6112103-01" on Fathead Minnows <br /> The results of this test are summarized in Table 1. Briefly, there was 100% survival at the Lab <br /> Control treatment; there was >80% survival in each of the waste treatment levels. These results <br /> indicate that the LC5o of this sample is greater than the "hazardous waste" toxicity threshold of <br /> 500 mg/L, and that this sample should not be considered "hazardous" with respect to fish <br /> toxicity. <br /> The test data and summary of statistics for this test are presented in Appendix B. <br /> Table 1. Results of the hazardous waste toxicity evaluation of the "S61-12103-01" sample. <br /> Sample Treatment Level Mean % Survival <br /> Lab Control 100 <br /> 250 mg/L 90 <br /> 400 mg/L 95 <br /> 500 mg/L 95 <br /> 600 mg/L 80 <br /> 750 mg/L 85 <br /> LC50>750 m /L <br /> 4. SUMMARY AND CONCLUSIONS <br /> The results of this toxicity test indicate that the waste sample "S61-12103-01" was not acutely <br /> toxic to fathead minnows at the test treatment levels. The LC50 of this sample was>500 mg/L, <br /> and the sample should thus not be considered a hazardous waste with respect to fish toxicity. <br /> 4.1 QA/QC Summary <br /> Test Conditions - Test conditions (pH, D.O., temperature, etc.) were all within acceptable limits <br /> for the fathead minnow acute toxicity test. All analyses were performed according the laboratory <br /> Standard Operating Procedures. <br /> Negative Control - The biological responses for the test organisms at the Lab Control treatment <br /> were within acceptable limits. <br /> Page 3 <br />