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Geo,Analytical Laboratories, Inc. <br /> 1405 Kansas Avenue Modesto, CA 9535' Phone (209) 572-jK0 Fax (209) 572-0916 <br /> CERTIFICATE OF ANALYSIS <br /> Report# P007-21 BTEX Date: 1/14/03 <br /> Date Rec'd: 1/07/03 <br /> Thorpe Oil Project: S.T.Service-3505 Navy Dr. Stockton,Ca. Date Started: 1/10/03 <br /> PO Box 357 Date Completed.-1/13/03 <br /> Lodi CA 95241 PO# <br /> Date Sampled: 1/07/03 <br /> Sampler. R.Azevedo(Geo) <br /> Sample ID Lab ID RL Method Analyte Results Units <br /> TK2-West@11' P200058 5.0 8021B Benzene ND pg/Kg <br /> 5.0 Toluene ND pg/Kg <br /> 5.0 Ethyl Benzene ND pg/Kg <br /> 5.0 Total Xylenes 28 jig/Kg <br /> Surrogate Amnt Spiked Amnt Rec. %Recovery QC Limit 9% <br /> a,a,a-TFT 250 226 90.40 66-117 <br /> TK2-East @11' P200059 5.0 8021B Benzene ND pg/Kg <br /> 5.0 Toluene ND pg/Kg <br /> 5.0 Ethyl Benzene 99 jig/Kg <br /> 5.0 Total Xylenes 61 pg/Kg <br /> Surrogate Amnt Spiked Amnt Rec. %Recovery QC Limit% <br /> a,a,a-TFr 250 289 115.60 66-117 <br /> Stockpile 2-A Thru 2-C P200060 5.0 8021B Benzene ND pg/Kg <br /> Thro 5.0 Toluene ND pg/Kg <br /> P200062 5.0 Ethyl Benzene ND pg/Kg <br /> 5.0 Total Xylenes 197 pg/Kg <br /> Surrogate Amnt Spiked Amnt Rec. %Recovery QC Limit% <br /> a,a,a-TFT 250 305 122.00 66-117 <br /> Mario D'Onofrio Donna Keller <br /> Chemist Certification it 1157 <br /> Laboratory Director <br />