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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# N091-02 Date 4/10/02 <br /> Advanced GeoEnv;ronmental,Inc Source. Date Rec'd 4/1/02 <br /> Date Started 4/1/02 <br /> 837 Shaw Rd <br /> Stockton CA 95215 Date Completed 4/5/02 <br /> Project Flag City Chevron Date Sampled 3/31/02 <br /> Time 5 00pm <br /> Sampler <br /> Sample ID• Replicate <br /> Lab ID N303328 <br /> Aquatic Toxicity <br /> Test Type EPA160014-901027F Control 625% 25% 50% 75% 100% <br /> Dilution Water ReconStrtuted 01 Water Initial pH 7 45 7 53 7 57 7 56 767 788 <br /> Species Pimephales Promelas (Larval) DO 8 40 8 61 873 8 84 8 92 8 99 <br /> Common Name Fathead Minnow Temp°C 20 4 20 4 205 205 205 205 <br /> Supplier Aqua Tox <br /> Dilution Volume 2000 ml 24 Hrs. pH 7 41 7 48 7 56 7 52 764 784 <br /> #Fish per Dilution 20 DO 7 84 8 07 817 8 15 845 857 <br /> D in Acclimation Tank < 1 % Temp'C 20 2 203 203 20 2 20 1 203 <br /> ge Length NA Mortalities 0 0 0 0 0 0 <br /> Average Weight NA 4$ Hrs pH 742 7 45 7 52 747 763 7 83 <br /> DO 720 769 779 751 812 805 <br /> Temp°C 20 1 200 199 200 200 201 <br /> Mortalities 0 0 1 0 0 0 <br /> Initial Control Hardness 93 72 Hrs, pH 737 7 41 750 745 7 57 7 80 <br /> Final Control Hardness 93 D O 6 89 7 11 720 692 7 64 7 79 <br /> Temp°C 20 4 203 204 204 204 20 4 <br /> Mortalities 0 0 0 0 0 0 <br /> 96 Hrs pH 736 737 747 743 752 776 <br /> DO 662 6 80 6 98 665 715 744 <br /> Temp°C 20 2 202 202 20 3 203 203 <br /> Mortalities 0 0 0 0 0 0 <br /> Total Mortalities 0 0 1 0 0 0 <br /> Notes <br /> Razntro Salgado{/'" Donna Keller <br /> Chemist Certificabon # 1157 Laboratory Director <br />