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Geo alytical Laboratories, C. <br />1405 Kansas Avenue Modesto, CA 95351 Phone (209) 572-0900 Fax (209) 572-0916 <br />CERTIFICATE OF ANALYSIS <br />Report# P122-12 <br />BTEX <br />Date: 5/09/03 <br />Thorpe Oil <br />Project: Thorpe's Yard <br />250 <br />Date Rec'd: 5/02/03 <br />PO Box 357 <br />Dispenser #10 @ 4' P200650 5.0 8021B <br />Benzene <br />Date Started: 5/06/03 <br />Lodi <br />CA 95241 PO# <br />Toluene <br />Date Completed:5/06/03 <br />µg/Kg <br />5.0 <br />Ethyl Benzene <br />Date Sampled: 5/02/03 <br />µg/Kg <br />5.0 <br />Total Xylenes <br />Sampler: R. Azevedo (Geo) <br />Sample ID <br />Lab ID RL Method <br />Analyte <br />Results Units <br />QC Limit % <br />a,a,a-TFT <br />250 <br />206 82.4 <br />Dispenser #9 @ 4' <br />P200649 5.0 8021B <br />Benzene <br />ND µg/Kg <br />5.0 <br />Toluene <br />ND µg/Kg <br />5.0 <br />Ethyl Benzene <br />ND gg/Kg <br />5.0 <br />Total Xylenes <br />ND µg/Kg <br />Surrogate <br />Amnt Spiked <br />Amnt Rec. % Recovery <br />QC Limit % <br />a,a,a-TFT <br />250 <br />201 80.4 <br />66-117 <br />Dispenser #10 @ 4' P200650 5.0 8021B <br />Benzene <br />ND <br />µg/Kg <br />5.0 <br />Toluene <br />ND <br />µg/Kg <br />5.0 <br />Ethyl Benzene <br />ND <br />µg/Kg <br />5.0 <br />Total Xylenes <br />ND <br />µg/Kg <br />Surrogate <br />Amnt Spiked <br />Amnt Rec. % Recovery <br />QC Limit % <br />a,a,a-TFT <br />250 <br />212 84.8 <br />66-117 <br />Dispenser #11 @ 4' P200651 5.0 . 8021B <br />Benzene <br />ND <br />gg/Kg <br />5.0 <br />Toluene <br />ND <br />µg/Kg <br />5.0 <br />Ethyl Benzene <br />ND <br />µg/Kg <br />5.0 <br />Total Xylenes <br />ND <br />µg/Kg <br />Surrogate <br />Amnt Spiked <br />Amnt Rec. % Recovery <br />QC Limit % <br />a,a,a-TFT <br />250 <br />206 82.4 <br />66-117 <br />Mario D'Onofrio 4:5 <br />Chemist <br />Certification # 1157 <br />N <br />Donna Keller <br />Laboratory Director <br />