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GeoA a1 tical, , <br /> Laboratories, Inc. <br /> 1405 Kansas Avenue Modesto,CA 95351 Phone (209) 572-0900 Fax (209) 572-0916 <br /> CERTIFICATE OF ANALYSIS <br /> Report# N100-11 BTEX & Gas Date: 4/19/02 <br /> Thorpe Oil Project: Stockton Fire Station-Sonora St. Date Recd: 4/10/02 <br /> PO Box 357 Date Started: 4/16/02 <br /> Lodi CA 95241 PO# <br /> Date Completed:4/1"6/02 <br /> '� <br /> Date Sampled: 4/10/02 <br /> Sampler: R.Chrun/R.Azevedo <br /> Sample ID Lab ID RL Method Analyte Results Units <br /> Stockpile#5 N200895 5.0 8021B Benzene ND pg/Kg <br /> 5.0 Toluene ND /K <br /> 11g g <br /> 5,0 Ethyl Benzene ND Pg/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 /> II a,a,a-TFT 250 247 98.8 66-117 <br /> i <br /> Stockpile#6 N200896 5.0 8021B Benzene 9.1 pg/Kg <br /> 5.0 Toluene 119 jig/Kg <br /> 5.0 Ethyl Benzene 47 pg/.Kg <br /> 5.0 Total Xylenes 326 pg/Kg <br /> 1.0 5030/LUFT Gasoline - " ""' 3_7mg/Kg <br /> Surrogate Amnt Spiked Amnt Rec. R6 Recovery QC Limit% <br /> a,a,a-TFT 250 256 102.4 66-117 <br /> I <br /> } <br /> r <br /> s <br /> i <br /> V <br /> Mario D'Onofria Donna Keller <br /> Chemist Certification # 1157 Laboratory Director i <br />