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• <br /> Pacific EcoRisk Environmental Consulting&Testing <br /> 3. RESULTS <br /> 3.1 Effects of the Waste Sample on Fathead Minnows <br /> The results of this test are summarized in Table 1. There was 100%survival at the Lab Control <br /> treatment; there was also 100%survival in each of the waste treatment levels. These results <br /> indicate that the LC50 of this sample is greater than the"hazardous waste" toxicity threshold of <br /> 500 mg/L, and that this sample should not be considercd "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 waste sample"Sample 1 West&2 East". <br /> Sample Treatment Mean %Survival <br /> Lab Control 100 <br /> pH-adjusted Control 100 <br /> 250 mg/L. 100 <br /> 500 m g/L 100 <br /> 750 m g/L 100 <br /> LC50=>500 mglL <br /> 4. SUMMARY AND CONCLUSIONS <br /> The results of this toxicity test indicate that the waste sample"Sample 1 West& 2 East"was not <br /> acutely toxic to Fathead minnows at the test treatment levels. The LC50 of this sample was 7500 <br /> mg/L, and therefore, the sample should not be considered a hazardous waste with respect to fish <br /> toxicity. <br /> 4.1 QA/QC Summary <br /> Test Conditions-Test conditions(pH, D.O., temperature, etc.)were all within acceptable limits <br /> for this test. All analyses were performed according to laboratory Standard Operating <br /> 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 />