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Sequoia 819 Straker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> (916)921-9600 <br /> NO Analytical FAX(916)921 <br /> www sequoialabs com com <br /> i <br /> Stratus Environmental Project ARCO 6100,Tracy,CA <br /> 3330 Cameron Park Drive, Ste 550 Project Number 6100,Tracy,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 10/21/02 17 45 <br /> BTEX by EPA Method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Lama Units Dilution Batch Prepared Analyzed Method Notes <br /> Domestic Well(S209370-01)Water Sampled 09/18/02 08 40 Received 09/18/02 10 30 <br /> Tert-butyl alcohol ND 5 0 ugll 1 2090241 09/23/02 09/23/02 BPA 8260B <br /> Methyl tert-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Tert-amyl methyl ether ND 050 " <br /> Benzene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline(C6-C 10) ND50 <br /> Surrogate Toluene-d899% 60-140 <br /> Surrogate 4-BFB 98% 60-140 <br /> Surrogate 1,2-DCA-d4 99% 60-140 <br /> quoia 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 2 of 5 <br />