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GeoAnalytical Labbratorles, Inc. <br /> 1405 Kansas Avenue Modesto, CA 95351 Phone (209) 572-0900 Fax (209) 572-0916 <br /> CERTIFICATE OF ANALYSIS <br /> Re ort# N100-11 BTEX & Gas ? <br /> P Date: 4/19/02 <br />' <br /> Thorpe Oil Date Recd: 4/10/02 i <br /> P Project: Stockton Fire Station-Sonora St. Date Started: 4/15/02 <br /> PO Box 357 Date Completed-.4/15/02 <br /> Lodi CA 95241 PO# <br /> i <br /> Date Sampled: 4/10/02 <br /> Sampler: R.Chrun/R.Azevedo <br /> Sample ID Lab ID RL Method Analyte Results Units <br /> Soil Sample 41 North@4' N200889 5.0 802113 Benzene ND jig/Kg' <br /> 5.0 Toluene ND lig/Kg <br /> 5.0 Ethyl Benzene ND lig/Kg <br /> 5.0 Total Xylenes ND lig/Kg <br /> i 1.0 5030/LUFT Gasoline ND mg/Kg <br /> a <br /> i <br /> Surrogate Amnt Spiked Amnt Rec. %Recovery QC Limit% <br /> a,a,a-TFT 250 23.4 93.6 66-117 <br /> l <br /> Tank @11' N200890 5.0 8021B Benzene ND lig/Kg <br /> 5.0 <br /> Toluene 16 lig/Kg <br /> 5.0 Ethyl Benzene 5.4 lig/Kg <br /> 5.0 Total Xylenes 43 pg/Kg <br /> 1.0 5030/LUFT Gasoline ND mg/Kg <br /> Surrogate Amnt Spiked Amnt Rec. %Recovery QC Limit% <br /> a,a,a-TFT - 250 251 100.4 66-117 <br /> I <br /> Stockpile#1 N200891 5.0 8021B Benzene ND lig/Kg !' <br /> 5.0 Toluene ND lig/Kg <br /> is <br /> 5.0 Ethyl Benzene ND lig/Kg <br /> 5.0 Total Xylenes ND lig/Kg <br /> 1.0 5030/LUFT Gasoline ND mg/Kg <br /> Surrogate Amnt Spiked Amnt Rec %Recovery QC Limit% <br /> a,a,a-TFT 250 231 92.4 66-117 <br /> II - <br /> f i <br /> i <br /> Mario D'Ono io Donna Keller <br /> Chemist Certification # 1157 <br /> Laboratory Director <br />