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,� , <br /> 819 Striker Avenue Suite 8 <br /> Sequoia - - Sacramento CA 956 <br /> (916)921-9600 <br /> FAX(916)92 1-0 100 <br /> Analytical www sequoialabs corn <br /> Gettler-Ryan-Petaluma Project Former Tosco 6981,Stockton,CA 5209465 <br /> 1364 N McDowell Blvd Ste B2 Project Number NIA Reported <br /> Petaluma CA,94954 Project Manager Dave Vossler 10/04/02 17 48 <br /> Gaso11ne1BTEX\Oxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> VW-7(S209465-01)Water Sampled 09/20/02 10 28 Received 09/20/02 15 25 <br /> Benzene 280 10 ug/l 20 2100028 10/02/02 10/02/02 EPA 8260B <br /> Toluene 500 10 <br /> Ethylbenzene 200 10 <br /> Xylenes(total) 3200 10 <br /> Methyl tent-butyl ether ND 10 " <br /> Gasoline(C6-C10) 16000 1000 " <br /> Surrogate 1,2-DCA-d4 <br /> 103 % 60-140 " <br /> Surrogate Toluene-d8 96% 60-140 " <br /> i <br /> Surrogate 4-BFB 100% 60-140 <br /> MW-16(5209465-02)Water Sampled 09/20/0210 36 Received 09/20/02 15 25 <br /> Benzene 100 5 0 ug/l 10 2100028 10/02/02 10/02/02 EPA 8260B <br /> Toluene ND 5 0 " <br /> Ethylbenzene 32 5 0 " <br /> Xylenes(total) 42 5 0 <br /> Methyl tert-butyl ether 140 5 0 " <br /> Gasoline(C6-C10) 690 500 <br /> Surrogate 1,2-DC.4-d4 102 % 60-140 <br /> Surrogate Toluene-d8 98% 60-140 " <br /> Surrogate 4-BFB 98% 60-140 " <br /> Sequoia Analytical- Sacramento The results in this report ripply to the samples analyzed:n accordance with the char <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 3 of 6 <br />