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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 /> ort# N33$-12 Date 12/23/02 <br />' Advanced GeoEnvtronmental, Inc Date Rec'd 12/4/02 <br /> 837 Shaw Rd Source Date Started 12/4/02 <br />' Stockton CA 95215 Date Completed 12/8/02 <br /> Project Flag City Chevron Date Sampled 12/3/02 <br />' <br /> ` Time 2 30 prn <br /> Sample ID Effluent Sampler <br /> Lab ID N312483 <br />' Aquatic Toxicity <br />' Test Type 96hr static acute Control 625% 25% 50% 75% 100% <br /> Dilution Water Reconstituted DI Water Initial pH 7 4 74 7 4 7 5 75 75 <br />' Species P3mephales Promelas (Larval) 1214102 DO 83 8 4 8 3 8 4 8 4 8 4 <br /> Common Name Fathead Minnow Temp°C 201 200 200 20 1 202 202 <br /> Supplier Aqua Tox <br />' Dilution Volume 2,000ml 24 Hrs. pH 73 75 7 3 7 3 74 74 <br /> #Fish per Dilution 20 1215/02 DO 8 2 70 6 8 6 6 62 63 <br /> Dead in Acclimation Tank <1% Temp°C 19 7 198 197 197 198 198 <br /> ge Length NA Mortalities 0 0 0 0 0 0 <br /> ge Weight NA 48 Hrs pH 7 3 74 73 72 73 74 <br /> 1216102 DO 80 77 65 70 68 66 <br /> Temp°C 195 195 195 196 195 195 <br /> Mortalities 0 0 p 0 0 0 <br /> Initial Control Hardness 87 72 Hrs. pH 72 74 7 2 7 2 7 3 74 <br /> Final Control Hardness 87 1217102 DO 7 8 7 5 64 6 5 67 6 4 <br /> Temp°C 194 195 194 194 195 194 <br /> Mortalities 0 0 0 0 0 0 <br /> 96 Hrs. pH 73 73 72 72 73 74 <br /> 12/8/02 DO 72 74 6 6 6 6 6 4 61 <br /> Temp°C 202 202 203 202 203 204 <br /> I Mortalities 0 0 0 0 0 0 <br /> Total Mortalities 0 0 0 0 0 0 <br /> Notes <br /> There were no significant mortalities observed In this test <br /> ohr Bombaywala Donna Keller <br /> Inorganic Supervisor Certification # 1157 Laboratory Director <br />