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GeoAnalytical Laboratories, Inc. <br /> 1405 Kansas Avenue Modesto,CA 95351 Phone (209) 572-0900 Fax (209) 572-0916 <br /> CERTIFICATE OF ANALYSIS <br /> ert# P259-10 Date: 9/23/03 <br /> Advanced GeoE <br /> nvironmental Date Recd 9/16/03 <br /> 837 Share Rd S°tee' Date Started 9/16/03 <br />' Stockton CA 95215 Date Completed 9/20/03 <br /> Project Flag City Chevron Date Sampled 9/15/03 <br /> Time 0310pm <br /> Sampler <br /> Sample ID• Effluent - Replicate <br />' Lab ID: P308558 <br /> r <br /> Aquatic Toxicity <br /> Test Type 96hr Static acute Control 625% 25% 50% 75% 100% <br /> Dilution Water Reconstituted DI Water Initial pH 81 8 0 78 77 77 77 <br /> Species Pimephales Promelas (Larval) 9/16/03 DO 81 8 0 80 76 78 72 <br /> Common Name Fathead Minnow Temp°C 206 205 204 204 204 203 <br /> Suppher Aqua Tox <br /> Dilution Volume 2000ml 24 Hrs pH 80 81 82 82 82 82 <br /> #Fish per Dilution 20 9/17/03 DO 84 81 79 78 79 78 <br /> D d in Acclimation Tank s 1 % Temp IC 200 20 0 200 201 201 200 <br /> ge Length Mortalities 0 0 0 0 0 0 <br />�A rage Weight 4 H 8 1 8 2 8 3 8 4 <br /> $ H rS. p 85 85 <br /> 9/18/03 DO 84 81 79 78 79 86 <br /> Temp°C 204 20 5 205 204 204 206 <br /> Mortalities 0 0 0 0 0 0 <br /> Initial Control Hardness 88 72 H rs pH 80 8 3 83 85 8 5 85 <br /> Final Control Hardness 88 9119/03 D O 85 85 85 85 8 6 86 <br /> Temp°C 200 198 198 198 199 200 <br /> Mortalities 0 0 0 0 0 0 <br /> 96 Hrs. pH 78 82 82 82 83 83 <br /> 9/20/03 DO 83 84 84 84 83 83 <br /> Temp°C 202 20 3 203 203 204 203 <br /> Mortalities 0 0 0 0 0 0 <br /> Total Mortalities 0 0 0 0 0 0 <br /> Notes <br /> C"L <br /> Kanti Gandhi Donna Keller <br /> Chemist Certification # 1157 Laboratory Director <br />