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a— ) (4013)$85 .IarvisSequoia Morgan8ill CA9503750J77 776 9600 <br /> Analytical FAX(408)7$26308 <br /> www sequoialabs cam <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA MNA0375 <br /> 3017 Kilgore Rd Suite 100 Project Number 38984 Reported <br /> Rancho Cordova CA,95670 Prosect Manager Rusty Benkosky 01/28/04 16 50 <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 /> MW-7(MNA0375-07)Water Sampled 01/12/04 16 00 Received 01/14/04 10 40 <br /> Tert-amyl methyl ether ND 10 ug/l 1 4010373 01/21/04 01/21/04 EPA 8260B <br /> Benzene ND 0 50 " <br /> Tert-butyl alcohol ND 20 " <br /> Di-isopropyi ether ND 10 " <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> 1,2-Dichloroethane 2 6 0 50 " <br /> Ethanal ND 100 " <br /> Ethylberizene ND 050 " <br /> Ethyl tert-butyl ether ND 10 <br /> Methyl tert-butyl ether ND 0 50 <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate Dibromofluoromethane 126% 84-122 <br /> Surrogate 1,2-Dichloroethane-d4 102% 74-135 <br /> Surrogate Toluene-d8 106% 84-119 <br /> Surrogate 4-Bromofluorobenzene 108% 86-119 " <br /> MW-8(MNA0375-08)Water Sampled 01/12/04 12 20 Received 01/14/04 10 40 <br /> Tert-amyl methyl ether ND 10 ug/l 1 4010373 01/21/04 01/21/04 EPA 8260B <br /> Benzene ND 050 " <br /> Tert-butyl alcohol ND 20 " <br /> Dt-tsopropyl ether ND 10 <br /> 1,2-Dibromoethane(EDB) ND 0 50 " <br /> 1,2-Dichloroethane ND 0 50 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 0 50 <br /> Ethyl tert-butyl ether ND 10 " <br /> Methyl tent-butyl ether ND 0 50 <br /> Toluene ND 0 50 <br /> Xylenes(total) ND 050 <br /> Surrogate DibromoJluoromethane 122% 84-122 <br /> Surrogate 12-Dichloroethane-d4 101 % 74-135 " <br /> Surrogate Toluene-0 106% 84-119 " <br /> Surrogate 4-Bromofluorobenzene 110% 86-119 " <br /> Sequoia Analytical-Morgan Hill 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 /> oasts This analytical report must be reproduced in its entirety <br /> Page 9 of 30 <br />