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1455 McDowell Blvd,North Ste D <br /> a) Sequoia Petaluma,CA 94954 <br /> (707)792-1865 <br /> IW Analytical FAX(707)792-0342 <br /> www sequoialabs com <br /> URS Corp-Sacramento Project Arco Site 2093,Tracy,CA P406072 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number lntrim-50265 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 06/17/0417 27 <br /> BTEX by EPA Method 8260B <br /> Sequoia Analytical - Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> ATR-8(P406072-02)Water Sampled 06/01/04 15 30 Received 06/02/04 09 45 <br /> Benzene ND 050 ug/I I 4F14005 06/14/04 06/14/04 EPA 8260B <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Surrogate 1 2-Dichloroethane-d4 109% 78-129 " <br /> ATR-5(P406072-03)Water Sampled 06/01/04 15 40 Received 06/02/04 09 45 <br /> Benzene ND 050 ug/l 1 4F14005 06/14/04 06/15/04 EPA 82608 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate 12-Dichloroelhane-d4 112% 78-129 " <br /> Sequoia Analytical -Petaluma The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 4 of 11 <br />