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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> `70'791-1865 <br /> Analytical <br /> FAX(707)792-0342 <br /> WWW sevoialabs com <br /> URS Corp-Sacramento Project Arco Site 6020,Manteca,CA P406056 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intrim-50681 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 06/14/04 20 24 <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 /> MW-5(P406056-01)Water Sampled 05/26/04 12 35 Received 05/28/0416 05 <br /> Benzene ND 050 ugA 1 4FO7003 06/07/04 06/07/04 EPA 826013 <br /> Toluene ND 050 " ^ <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " ^ <br /> Surrogate 12-Dichloroethane-d4 120% 78-129 " <br /> MW-6(P406056-02)Water Sampled 05/26/0411 35 Received 05/28/0416 05 <br /> Benzene ND 10 ug/l 2 4FO7003 06/07/04 06/07/04 EPA 826013 <br /> Toluene ND 10 <br /> Ethylbenzene ND 10 <br /> Xylenes(total) ND 10 <br /> Surrogate 1,2-Drchloroethane-d4 117% 78-129 " <br /> MW-7(P406056-03)Water Sampled 05/26/04 13 40 Received 05/28/04 16 05 <br /> aenzene ND 050 ugn 1 4FO7003 06/07/04 06/07/04 EPA 8260B <br /> oluenc ND 050 ^ <br /> Ethylbenzenc ND 050 » " <br /> Xylenes(total) ND 050 <br /> Surrogate 12-Drchloroethane-d4 114% 78-129 " <br /> MW-8(P406056-04)Water Sampled 05126104 13 15 Received 05/28/04 16 05 <br /> Benzene ND 050 ug/l 1 4FO7003 06/07/04 06/07/04 EPA 9260B <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 <br /> Surrogate 1 2-Drchloroethane-d4 120% 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 3 of 20 <br />