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1455 McDowell Blvd North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> (707)792-1865 <br /> iW Analytical www <br /> seq(707)792-0342 <br /> om <br /> www sequoialabs cam <br /> 0 <br /> URS Corp-Sacramento Project Arco Site 2130,Stockton,CA P406495 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intrim-50293 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 07/29/04 17 56 <br /> BTEX by EPA Method 8260B <br /> Sequoia Analytical -Morgan Hill <br /> Reporting <br /> Analyte Result Lrmrt Units Dilution Batch Prepared Analyzed Method Not <br /> VW-3(P406495-18)Water Sampled 06/24/04 20 39 Received 06/25/04 09 30 <br /> Benzene ND 0 50 ug/l 1 4607024 07/07/04 07/08/04 EPA 8266E <br /> Ethylbenzene ND 0 50 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate 1,2-Drchloroethane-d4 III% 78-129 " <br /> VW-4(P406495-19)Water Sampled 06/24/04 02 59 Received 06/25/04 09 30 <br /> Benzene ND 050 ug/l 1 4607024 07/07/04 07/08/04 EPA 8260E <br /> Ethylbenzene ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate 1,2-Drchloroethane-d4 108% 78-129 " <br /> VW-5(P406495-20)Water Sampled 06/24/042056 Received 06/25/040930 <br /> Aftenzene ND 2 5 ug/l 5 4GO8001 07/08/04 07/08/04 EPA 8260B <br /> ylbenzene ND 2 5 " <br /> Toluene ND 2 5 " <br /> Xylenes(total) ND 2 5 <br /> Surrogate 1,2-Drchloroethane-d4 90% 78-129 " <br /> VW-7(P406495-21)Water Sampled 06124/040409 Received 06125/040930 <br /> Benzene ND 050 ug/1 1 4G07024 07/07/04 07/07/04 EPA 8260B <br /> Ethylbenzene ND 050 " <br /> Toluene ND 050 <br /> Xylencs(total) ND 050 <br /> Surrogate 1,2-Dichloroethane-d4 115% 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 /> 0 This analytical report must be reproduced in its entirety <br /> Page I 1 of 41 <br />