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` \ <br /> Sequoia� e 1455 McDow P Blvd,North Ste D <br /> � Petaluma,CA 94954 <br /> {707}792-1865 <br /> Analytical <br /> FAX equoi labs c 42 <br /> www sequoialahs com <br /> Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P401156 <br /> 30171C11gare Road Suite 100 Project Number 38984 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 01/27/04 15 26 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> AS-EFF(P401156-07)Water Sampled 01/12/04 13 00 Received 01/13/04 08 05 <br /> Benzene ND 050 ug/l 1 4010246 01/15/04 01/15/04 EPA 8260B <br /> Ethylbenzene ND 050 " <br /> Methyl tert-butyl ether 36 050 <br /> Toluene ND 050 ^ <br /> Xylenes(total) ND 050 <br /> Surrogate Dibromofluoromethane 100% 84-122 " <br /> Surrogate 12-Dtchloroethane-d4 106% 74-135 " <br /> Surrogate Toluene-d8 104% 84-119 " <br /> EFF(P401156-08)Water Sampled 01/12/04 12 55 Received 01/13/04 08 05 -- <br /> Benzene ND 050 ug/l 1 4010246 01/15/04 01/15/04 EPA 8260B <br /> Ethylbenzene ND 050 <br /> Methyl lent-butyl ether ND 050 <br /> Toluene ND 050 <br /> Xylenes(total) ND 050 " <br /> Surrogate DibromoJluoromelhane 98% 84-122 <br /> Surrogate 1,2-Dtchloroethane-d4 109% 74-135 <br /> Surrogate Toluene-d8 102% 84-119 <br /> I <br /> I <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 7 of 16 <br />