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GeoAnaly tical Laboratories, Inc, <br /> 1405 Kansas Avenue Modesto, CA 95351 Phone (209) 572-0900 Fax (209} 572-0916 <br />' CERTIFICATE OF ANALYSIS <br /> Dort# N248-28 Date 9/16/02 <br />' Advanced GeoEnvironmental, Inc Date Rec'd 9/5/02 <br /> 837 Shaw Rd Source Started 9/6/02 <br />' Stockton CA 95215 Date Completed 9/10/02 <br /> Project Flag City Chevron Date Sampled 9/5/02 <br /> Time <br />' Sample ID Effluent Sampler <br /> Lab ID N309256 <br />' <br /> Aquatic Toxicity <br /> Y <br />' Test Type 96hr static acute Control 625% 25% 50% 75% 100% <br /> Dilution Water Reconstituted DI Water Initial pH 74 75 77 74 74 76 <br />' Species Pimephales Promelas (larval) 916/02 DO 85 86 87 87 88 89 <br /> Common Name Fathead Minnows Temp°C 200 200 200 200 200 200 <br /> Supplier Aquatox <br />' Dilution Volume 2,000 ml 24 Hrs. pH 76 76 76 74 75 75 <br /> #Fish per Dilution 20 917102 DO 84 84 83 84 84 85 <br /> Dead in Acclimation Tank <1% Temp°C 197 196 196 196 197 196 <br /> age Length NA Mortalities 0 0 0 0 0 0 <br /> age Weight NA 48 Hrs. pH 76 75 76 74 74 74 <br /> 918/02 DO 84 83 81 82 83 79 <br /> Temp°C 201 201 200 20 1 201 200 <br /> Mortalities 0 0 0 0 0 0 <br /> Initial Control Hardness 91 72 Hrs. pH 76 75 75 74 74 75 <br /> Final Control Hardness 91 919102 DO 83 80 78 77 80 76 <br /> Temp°C 204 205 206 205 204 205 <br /> Mortalities 0 0 0 0 0 0 <br /> 96 Hrs pH 75 75 75 75 73 73 <br /> 9110102 DO 83 76 75 75 78 73 <br /> Temp°C 208 208 208 207 207 208 <br /> Mortalities 0 1 0 0 0 0 <br /> Total Mortalities 0 1 0 0 0 0 <br /> Notes <br /> There were no significant mortalities observed In this test <br /> I <br /> 0 <br /> PM J P Wll <br /> Rohit Bornba wala <br /> y Donna Keller <br /> Inorganic Supervisor Certification # 1157 Laboratory Director <br />