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1455 Mc Dow Blvd North S <br /> Sequoia Petaluma CA 9499 544 <br /> (D (707)792 1865 <br /> ► <br /> Analytical FAX(707)792 0342 <br /> www sequoialabs cam <br /> Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P312141 <br /> 3017 Kilgare Road Suite 100 Project Number [none] Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 12/22/03 14 28 <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 /> INF(P312141-01)Water Sampled 12/03/03 14 20 Received 12/03/03 15 40 <br /> Benzene 770 120 ug/l 250 3120474 12/16/03 12117!03 EPA 8260B <br /> Ethylbenzene 130 120 " <br /> Toluene 1400 120 " <br /> Xylenes(total) 1200 120 " <br /> Surrogate Dibromofluoromethane 113 % 84-122 " <br /> Surrogate 1 1-Dichloroethane-d4 110% 74-135 " <br /> Surrogate Toluene-d8 115% 84-119 " <br /> INF(P312141-01RE1)Water Sampled 12/03/03 14 20 Received 12/03/03 15 40 HDSP <br /> Methyl tert-butyl ether 18000 500 ugll 1000 3120480 12/17/03 12/17/03 EPA 8260B <br /> Surrogate Dibromofluoromethane 102% 84-122 " <br /> Surrogate 12-Dichloroethane-d4 107% 74-135 " <br /> Surrogate Toluene-d8 103% 84-119 " <br /> MID-1(P312141-02)Water Sampled 12/03/03 14 10 Received 12/03/03 15 40 . <br /> Benzene ND 050 uO 1 3120474 12/16/03 12/16/03 EPA 8260B <br /> Ethylbenzene ND 0 50 " <br /> Methyl tert-butyl ether ND 0 50 " <br /> Toluene ND 0 50 " " " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate Dibromofluoromethane 112% 84-122 <br /> Surrogate 1,2-Dichloroethane-d4 104% 74-135 " <br /> Surrogate Toluene-d8 118% 84-119 ^ <br /> MID-2(P312141-03)Water Sampled 12/03/03 14 05 Received 12/03/03 15 40 <br /> Benzene ND 050 ug/] 1 3120474 12/16/03 12/16/03 EPA 82608 <br /> Ethylbenzene ND 0 50 <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate Dibromofluoromethane 113% 84-122 " <br /> Surrogate 12-Dichloroethane-d4 109% 74-135 " <br /> Surrogate Toluene-d8 117% 84-119 " <br /> i <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 6 of 16 <br />