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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"22029-1"was not acutely toxic to <br /> fathead minnows at the screening level concentrations tested.The LC5o of this sample was>750 <br /> mg/L,which is greater than the Title 22"Hazardous Waste"classification threshold of 500 <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 within acceptable limits <br /> for these tests. 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-00-001),and was determined to he acceptable. <br /> Page 3 <br /> 6113 <br />