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1455 McDowell Blvd. North,Ste. D <br /> Sequoia Petaluma,CA 94954 <br /> IC) (707) 792-1865 <br /> %„0 Analytical FAX(707)792-0342 <br /> Cambria Environmental Project: Shell Oil Co. Sampled: 9/29/99 <br /> 270 Perkins St. Project Number: 440 Charter,Stockton Received: 9/29/99 <br /> Sonoma,CA 95476 Project Manager: Tom Magney Reported: 10/11/99 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/8020M/Quality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov. Limits % Limit % Notes* <br /> Matrix Spike Dup 9100007-MSD2 P909665-01 <br /> Benzene 10/1/99 200 ND 244 ug/kg 65.0-135 122 20.0 4.80 <br /> Toluene 200 ND 224 65.0-135 112 20.0 4.37 <br /> Ethylbenzene 200 ND 201 65.0-135 101 20.0 1.96 <br /> Xylenes(total) 600 ND 645 _ _ 65.0-135 108_ 20.0 0 <br /> Surrogate: a,a,a-Trifluorotoluene 600 719 65.0-135 110 <br /> Sequoia Analytical-Petaluma *Refer to end of report for text of notes and dcfnitiuns. <br /> Pa,e 7 of I I <br />