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GeoAnalytical Laboratories, Inc. <br /> I 1405 Kansas Avenue Modesto,CA 95351 Phone (209) 572-0900 Fax (209)572-0916 <br /> CERTIFICATE OF ANALYSIS <br /> Ort# P177-1.7 Date: 7/8/03 <br /> Advanced GeoEnvironmental, Inc Date Rec'd 6/26/03 <br /> 837 Shaw Rd Source Date <br /> Started 6/27/03 <br /> Stockton CA 95215 Date Completed 7/1/03 <br /> Project• Flag City Chevron Date Sampled 6/25/03 <br /> I Time <br /> Sampler <br /> Sample ID Effluent <br /> Lab ID P306062 <br /> Aquatic Toxicity <br /> Test Type 96hr static acute Control 625% 25% 50% 75% 100% <br /> IDilution Water Reconstituted Dl Water Initial pH 81 8 0 77 76 76 75 <br /> Species Pimephales Promelas (Larval) 6127/03 D O 88 8 6 81 77 74 65 <br /> Common Name Fathead Minnow Temp'C 208 206 206 207 207 207 <br /> Supplier Aqua Tax <br /> Dilution Volume 2,000mI 24 Hrs pH 81 83 84 84 85 85 <br /> #Fish per Dilution 20 6128103 DO 8 7 8 4 80 82 74 78 <br /> D in Acclimation Tank Temp°C 206 206 207 206 206 206 <br /> ge Length NA Mortalities 0 0 0 0 0 0 <br /> Average Weight NA 48 Hrs. pH 8,1 8 3 84 85 85 85 <br /> 6129/03 DO 88 85 78 80 72 76 <br /> Temp°C 207 208 208 207 207 207 <br /> Mortalities 0 0 0 0 0 0 <br /> 11 Initial Control Hardness 87 72 Hrs pH 81 8 3 85 86 8 6 86 <br /> 1 Final Control Hardness 87 6/30103 DO 85 85 as 86 8 6 86 <br /> Temp°C 207 205 206 206 206 207 <br /> Mortalities 0 0 0 0 0 2 j <br /> I96 Hrs pH 81 83 85 86 86 86 <br /> 711103 DO 88 89 89 89 89 90 <br /> I Temp`C 206 204 205 205 205 208 <br /> Mortalities 0 0 0 2 2 1 <br /> Total Mortalities 0 0 0 2 2 3 <br /> INotes <br /> There were no significant mortalities observed In this test <br /> 1 <br /> '—z <br /> I <br /> • <br /> Kanti Gandhi Donna Keller <br /> Chernxst Certification # 1157 Laboratory Director <br />