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GeoAnaiytical Laboratories, Inc. <br /> 1405 Kansas Avenue Modesto,CA 95351 Phone (209) 572-0900 Fax (209) 572-0916 <br /> CERTIFICATE OF ANALYSIS <br />+port# Q167-15 Dane 7/14/04 <br /> Advanced GeoEnvironmental Date Recd 6/15/04 <br /> 837 Shaw Rd Source Date Started 6/16/04 <br /> Stockton CA 95215 Date Completed 6/20/04 <br /> Project Flag City Chevron Date Sampled 6/15/04 <br /> Time <br /> Sampler- <br /> Sample ID Effluent <br /> Lab ID• Q304097 <br /> Aquatic Toxicity <br /> Test Type 96hr static acute % Control 625% 25% 50% 75% 100% <br /> Dilution Water Reconstituted DI Water Initial pH 7 8 7 8 77 7 8 78 79 <br /> Species Pimephales Promelas (Larval) 6/16/04 DO 89 87 87 87 86 8 6 <br /> Common Name Fathead Minnow Temp°C 194 195 195 195 194 194 <br /> Supplier Aqua Tox <br /> Dilution Volume 2,000 ml 24 H rs pH 77 7B 77 77 77 73 <br /> #Fish per Dilution 20 6/17/04 DO 87 88 84 84 87 86 <br /> Dead in Acclimation Tank Temp°C 202 204 203 201 203 202 <br /> rage Length Mortalities 0 0 0 0 0 0 <br /> ge Weight 48 H rs pH 77 77 77 78 78 78 <br /> 6118104 DO 84 83 84 84 83 82 <br /> Temp°C 204 204 205 204 203 204 <br /> Mortalities 0 1 0 0 0 0 <br /> Initial Control Hardness 89 72 H rs pH 76 77 76 78 78 78 <br /> Final Control Hardness 89 6119/04 00 82 81 78 77 74 76 <br /> Temp°C 208 207 208 208 208 207 <br /> Mortalities 0 0 0 0 0 0 <br /> 96 Hi's, pH 76 76 76 78 77 77 <br /> 6/20/04 DO 79 79 75 78 82 81 <br /> Temp'C 204 204 203 202 202 203 <br /> Mortalities 0 0 0 0 0 0 <br /> Total Mortalities 0 1 0 0 0 0 <br /> Nates <br /> There were no significant mortalities observed In this test <br /> Kanti Gandhi Donna Keller <br /> Chemist Certification # 1157 Laboratory Director <br />