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GeoAnaiyticai Laboratories, Inc. <br /> 1405 Kansas Avenue Modesto,CA 95351 Phone (209) 572-0900 Fax (209) 572-0916 <br /> • CERTIFICATE OF ANALYSIS <br /> Report# N255-14 Date: 9/19/02 <br /> WHF Environmental Project: Quarterly -Boyett Petrolium, Manteca, Date Rec'd: 9/12/02 <br /> ' PO Box 427 Ca. Date Started: 9/17/02 <br /> Oakdale CA 95361 PO# Date Completed:9/18/02 <br /> Date Sampled: 9/12/02 <br /> Sampler: Ray Azevedo/Rich <br /> Sample ID Lab ID RL Method Analyte Results Units <br />' MW-7 N309500 0.3 8021B Benzene ND pg/L <br /> 0.3 Toluene ND pg/L <br />' 0.3 Ethyl Benzene ND pg/L <br /> 0.6 Total Xylenes ND pg/L <br /> 100 Methyl tert-Butyl Ether (MTBE) 14200 pg/L <br /> 0.05 5030 Luft Gasoline ND rng/L <br />' Surrogate Amnt Spiked Amnt Rec. %Recovery QC Limit% <br /> a,a,a,TFT 250 207 82.80 70-125 <br />' ISMW-8 N309501 0.3 8021B Benzene ND pg/L <br /> 0.3 Toluene ND pg/L <br />' 0.3 Ethyl Benzene ND pg/L <br /> 0.6 Total Xytenes ND pg/L <br /> 1.0 Methyl tert-Butyl Ether (MTBE) ND pg/L <br /> 0.05 5030 Luft Gasoline ND mg/L <br />' Surrogate Amnt Spiked Amnt Rec. %Recovery QC Limit% <br /> a,a,a,TFT 25.0 23.1 92.40 70-125 <br />' MW-9 N309502 0.3 8021 B Benzene ND pg/L <br /> 0.3 Toluene ND pg/L <br />' 0.3 Ethyl Benzene ND pg/L <br /> 0.6 Total Xylenes 0.9 pg/L <br /> 1.0 Methyl tert-Butyl Ether (MTBE) ND pg/L <br /> 0.05 5030 Luft Gasoline ND mg/L <br />' Surrogate Amnt Spiked Amnt Rec. %Recovery QC Limit% <br /> a,a,a,TFT 25.0 19.7 78.80 70-125 <br /> r <br /> Mario D'�3no �o Donna Kell <br />' er <br /> Chemist Certification # 1157 Laboratory Director <br />