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819 Striker Avenue Suite 8 <br /> Sequoia j Sacramento C 95834 <br /> (91 G)921-96009Go0 <br /> FAX(916)921-0100 <br /> Analytical www sequoialabs com <br /> i <br /> Gelder-Ryan -Petaluma Project Former Tosco 6981,Stockton,CA S208311 <br /> 1364 N McDowell Blvd Ste B2 ProjectNutnber NIA Reported <br /> Petaluma CA, 94954 Project Manager Dave V09SIeT 08/29/02 14 28 <br /> Gasoline\BTEXIOxygenates by EPA method 826013 <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> VW-7 (5208311-01)Water Sampled 08122/021116 Received 08/22/021542 <br /> Benzene 300 25 ug/l 50 2080256 08/27/02 08/27/02 EPA 8260B <br /> Toluene 540 25 <br /> Ethylbenzene 220 25 „ <br /> Xylenes(total) 3400 25 <br /> Methyl tert-butyl ether ND 25 " <br /> Gasoline(C6-C1 0) 17000 2500 " <br /> Surrogate 1,2-DCA-d4 118% 60-140 <br /> Surrogate Toluene-d8 97% 60-140 <br /> Surrogate 4-BFB 97% 60-140 <br /> MW-16(5208311-02)Water Sampled 08/22/02 11 24 Received 08/22/02 15 42 <br /> Benzene 91 0 50 ugll 1 2080283 08/28/02 08/28/02 EPA 8260B <br /> T ene 0 63 050 <br /> benzene 26 050 „ <br /> nes(total) 33 050 , <br /> " <br /> Methyl tett-butyl 120 0 50 ether „ <br /> Gasoline(C6-C10) 720 50 HC-12 <br /> Surrogate 1,2-DCA-d4 <br /> 90% 60-140 <br /> Surrogate Toluene-d8 95% 60-140 <br /> Surrogate 4-BFB <br /> 98% 60-140 " <br /> i <br /> uora Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 3 of 7 <br /> i <br />