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i <br /> GeoAnalyti.cal Laboratories, Inc. <br /> I1405 Kansas Avenue Modesto,CA 95351 Phone (209) 572-0900 Fax (209) 572-0916 <br /> CERTIFICATE OF ANALYSIS <br /> IReport# L342-26 Date 12/14/00 <br /> Advanced GeoEnvironmental, Inc Date Reed 12/7/00 <br /> 4005 North Wilson Way Source Date Started 12/8/00 <br /> Stockton CA 95205 Date Completed 12/12/00 <br /> Project Flag City Chevron Date Sampled 12/6/00 <br /> Time <br /> Sampler <br /> Sample ID Effluent <br /> ILab ID L312183 <br /> Aquatic Toxicity <br /> I <br /> Test Type EPA/600/4-90/027F Control 625% 25% 50% 75% 100% <br /> Dilution Water Reconstituted DI Water Initial pH 759 749 740 731 718 701 <br /> Species Pimephales Promelas (Larval) 1218/00 DO 865 854 849 835 822 808 <br /> Common Name Fathead Minnow Temp°C 197 197 196 198 197 198 <br /> F <br /> upplier Aquatic Resources <br /> ilution Volume 2000ml 24 HCS pH 756 743 736 728 714 700 <br /> #Fish per Dilution 20 12/9/00 DO 8 15 813 805 821 786 776 <br /> loinAcclimation Tank <1% Temp°C 200 202 202 201 199 200 <br /> ge Length NA Mortalities 0 0 0 0 0 0 <br /> Average Weight NA 48 Hrs pH 752 741 734 727 708 689 <br /> 12/10/00 DO 791 786 790 793 757 735 <br /> Temp°C 204 204 205 203 205 203 <br /> Mortalities 0 0 0 0 0 0 <br />(Initial Control Hardness 88 72 Hrs pH 746 737 730 720 706 686 <br /> Final Control Hardness 88 12/11100 DO 765 752 763 758 734 698 <br /> Temp'C 199 198 197 197 197 199 <br /> Mortalities 0 0 0 0 0 0 <br /> 96 Hrs pH 744 730 728 718 703 675 <br /> 12/12/00 DO 723 714 734 726 714 675 <br /> I Temp°C 195 196 197 196 196 197 <br /> Mortalities 0 0 0 0 0 0 <br /> Total Mortalities 0 0 0 0 0 0 <br /> I Notes <br /> There were no significant mortalities In this test LC50>100% <br /> I ' <br /> I Ramiro Salgado Donna Keller <br /> Chemist Certification # 1157 Laboratory Director <br />