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GeoAnalytical 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 Date Recd: 4/10/02 <br /> p Project: Stockton Fire Station-Sonora 5t. Date Started: 4/15/02 <br /> PO Box 357 Date Completed-4/J,8/02 <br /> Lodi CA 95241 PO# i6 <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#1 South@51/2' N200874 5.0 8021B Benzene ND jig/Kg <br /> 5.0 Toluene ND pg/Kg <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. °/o Recovery QC Limit% <br /> a,a,a-TFT 250 248 99.2 66-117 <br /> Soil Sample#2 South@4'� N200875 50 8021B Benzene �{ 95 pg/Kg <br /> 50 Toluene 1550 �pg/Kg <br /> 50 Ethyl Benzene 5400 ;-pg/Kg <br /> 250 Total Xylenes 12600pg/Kg <br /> 10 5030/LUFT Gasoline 202 JKg, <br /> Surrogate Amnt Spiked Amnt Rec. %Recovery QC Limit% <br /> a,a,a-TFT 2500 2670 106.8 66-117 <br /> i <br /> Soil Sample#3 South@4' N200876 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 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-TFT 250 242 96.8 66-117 <br /> k <br /> t <br /> k <br /> Mario D'Onofrio Donna Keller <br /> Chemist Certification # 1157 Laboratory Director <br /> ti <br />