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r <br /> Geo nalytical Laboratories, -Inc. <br /> 1405 Kansas Avenue Modesto,CA 95351 Phone(209)572-0900 Fax (209) 572-0916 <br /> . I <br /> CERTIFICATE OF ANALYSIS <br /> Reportr# N072-21 BTEX &Gas Date: 3/21/02 <br /> Date Rec'd: 3/13/02 <br /> .Thorpe Oil Project: Tank Pull-Prendor(Stockton) Date Started: 3/15/02 <br /> PO Box 357 Date Completed3/20/02 <br /> Lodi CA 95241 . PO# <br /> Date Sampled: 3/13/02 <br /> Sampler: R Azevedo(Geo) <br /> Sample ID Lab ID RL Method Analyte Results Units <br /> TK1@9' N200671 500 8021B Benzene ND Pg/Kg <br /> 50 Toluene 29& pg/Kg <br /> 500 Ethyl Benzene 6320 pg/Kg <br /> 500 Total Xylenes 3030 pg/Kg <br /> 100 5030/LUFT Gasoline 149 mg/Kg <br /> Surrogate Amnt Spiked Amnt Rec. %Recovery QC Limit <br /> a,a a-TFr 25000 24000 96 66-117 <br /> TK2@10' N200672 125 8021B Benzene ND jig/Kg <br /> 125 Toluene 160 jig/Kg <br /> 125 Ethyl Benzene 9150 jig/Kg <br /> 500 Total Xylenes 58500 pg/Kg <br /> 25 5030/LUFT Gasoline ND mglKg <br /> Surrogate Amnt Spiked Amnt Rec. %Recovery QC Limit% <br /> a,a,a-TFr 25000 23100 92.4 66-117 <br /> Stockpile#1,2,3 N200673, 5.0 8021B Benzene ND pg/Kg <br /> N200674, 5,0 Toluene ND pg/Kg <br /> N200675 5.0 Ethyl Benzene 12 µg/Kg <br /> 5.0 Total Xylenes ND pg/Kg <br /> 1.0 5030/LUFT Gasoline ND mg/Kg <br /> Surrogate Amnt Spiked Amnt Rec. %Recovery QC Limit% <br /> a,a,a-TFr 250 214 85.6 66-117 <br /> Mario D'OnofffDonna Keller <br /> o <br /> Chemist Certification # 1157 Laboratory Director <br />