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Pacific EcoRisk <br />E <br />Environmental Consulting & Testing <br />4. SUMMARY AND CONCLUSIONS <br />The results of this toxicity test indicate that the waste sample "Liquid -1" was not acutely toxic to <br />fathead minnows at the test treatment levels. The LC5o of this sample was >750 mg/L, which is <br />greater than the Title 22 "Hazardous Waste" classification threshold of 500 mg/L, and therefore, <br />the sample should 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 within acceptable limits <br />for this test. All analyses were performed according to laboratory Standard Operating <br />Procedures. The client waived the pre-test holding period for the fish. <br />Negative Control — The biological responses at the Lab Control treatment were within <br />acceptable limits. <br />Concentration -Response Relationship — The concentration -response relationship for this test <br />was evaluated as per EPA guidelines (EPA -821-B-00-004), and was determined to be acceptable. <br />Page 3 L li > <br />6113 <br />