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�1 <br /> 30 June 2003 p <br /> Enifronmental Chemical Solutions <br /> P.O. Box 12032 <br /> Orange, CA 92859 <br /> Attention: Jim Figueira <br /> Dear Jim: <br /> The following are the results of the DOHS 96-hour Acute Aquatic Toxicity Screening test <br /> performed on the sample labeled Gas Pad submitted on 24 June 2003. <br /> The sample PASSED the DOHS 96-hour Acute Aquatic Toxicity Screening test. Currently, CCR <br /> Title 22 requires wastes to pass the 96-hour Aquatic Toxicity Screening test with greater than <br /> 50%survival at the 500 mg/I and 70%survival at the 750 mg/I concentrations for compliance. <br /> MBC Sample Number 03-399- Client Identification: Gas Pad <br /> PERCENT SURVIVAL <br /> 250 mglf 100% <br /> 500 mg/I 95% <br /> 750 mg/I 90% <br /> LC50> 750 mg4 <br /> If you have any questions or require further information, please contact me at your convenience. <br /> Cordially, <br /> MBC Applied Environmental Sciences <br /> S'�' sc�l <br /> Michael J. Mancuso <br /> Vice President Operations <br /> r <br /> MBC Applied Environmental Sciences,3000 Redhill Ave., Costa Mesa, CA 92626(714)8504830—Website:mbcnetnet <br />