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Pacific EcoRisk Environmental Consulting & Testing <br /> 4. SUMMARY AND CONCLUSIONS <br /> The results of this toxicity test indicate that the waste sample "Trailer Trash" was not acutely <br /> toxic to fathead minnows at the test treatment levels. The LC50 of this sample was>750 mg/L, <br /> which is greater than the Title 22 "Hazardous Waste" classification threshold of 500 mg/L, and <br /> therefore,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 these tests. All analyses were performed according to laboratory Standard Operating <br /> Procedures. <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 i > <br /> 6/13 <br />