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Sequoia 1455 McDowell Blvd North Ste D <br /> Petaluma,CA 94954 <br /> wo Analytical (707)792 1865 <br /> FAX 0707)792 0342 <br /> www sequoialabs corn <br /> Secor Rancho Cordova Project Arco Site 4932 Stockton,CA P411025 <br /> 3017 Kilgare Road Suite 100 Project Number WR 63964 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 01/04/05 11 35 <br /> Volatile Organic Compounds by PPA Method 8260B <br /> Sequoia Analytical- Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method <br /> Notes <br /> EW-4(P411025-03)Water Sampled 10/27/04 13 00 Received 10/28/04 07 55 <br /> Tert-amyl methyl ether ND 1000 ug/l 1000 4110095 11/03/04 11/03/04 EPA 82608 <br /> Bement: ND 500 <br /> Tert-butyl alcohol ND 20000 » <br /> Dl-tsopropyl ether ND 1000 <br /> 1,2-Dibromoethane(EDS) ND 500 ^ « <br /> 1,2-Dichloroethane ND 500 <br /> Ethanol ND 100000 <br /> Ethylbenzene ND 500 <br /> Ethyl tert-butyl ether ND 1400 <br /> Methyl tert-butyl ether 20000 500 ^ « <br /> Toluene ND 500 <br /> Xylenes(total) ND 500 <br /> Surrogate Dibromofluoromethane 10.5% 84-112 <br /> Surrogate 12-Dtchloroelhane-d4 108% 74-135 <br /> Surrogate Toluene-d8 115% 84-119 » " <br /> Surrogate 4-Bromofluarobenzene 100% 86-119 » „ <br /> EW-5(P411025-04)Water Sampled 10127/04 15 00 Received 10/28/04 07 55 <br /> Tert amyl methyl ether ND 100 ug/l loo 4110095 11/03/04 11/03104 EPA 82608 <br /> Benzene ND 50 <br /> Ten-butyl alcohol ND 2000 <br /> Di-isopropyl ether ND 100 <br /> 1,2-Dibromoethane(EDB) ND 50 <br /> 1,2-Dichloroethane ND 50 <br /> Ethanol ND 10000 <br /> Ethylbenzene ND 50 <br /> Ethyl tert-butyl ether ND 100 <br /> Methyl tent-butyl ether 3700 50 <br /> Toluene ND 50 <br /> Xylenes(total) 87 50 <br /> Surrogate Dibromofluoromethane 103% 84-122 <br /> Surrogate 12-Dichloroethane-d4 108% 74-135 <br /> Surrogate Toluene-d8 114% 84-119 <br /> Surrogate 4-Bromof7uorobenzene 101% 86-119 „ <br /> Sequoia Analytical-Petaluma <br /> The results to this report apply to the.samples analysed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported an a wet weight basar <br /> This analytical report must be reproduced in its entirety <br /> 0 <br /> Page 5 of 9 <br />