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885 Jarvis Drivt <br /> Sequoia Morgan Hill CA95037 <br /> (1� (409)776 9600 <br /> Analytical FAX(408)782 6308 <br /> www scquotalabs c� <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 Project 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-1(MNA0375-01)Water Sampled 01/13/0413 44 Received 01/14/0410 40 <br /> Tert-arnyi methyl ether ND l0 ug/l 10 4010389 01/21/04 01/21/04 EPA 8260B <br /> Benzene ND 5 0 1. " " <br /> Ter(-butyl alcohol ND 200 <br /> Di-tsopropyl ether ND 10 " <br /> 1,2-Dibromoethane(EDB) ND 50 <br /> 1,2-Dichloroethane 100 50 <br /> Ethanol ND 1000 " <br /> Ethylbenzene ND 5 0 <br /> Ethyl cert-butyl ether ND 10 " <br /> Methyl tert-butyl ether 430 5 0 <br /> Toluene ND 5 0 <br /> Xylenes(total) ND 5 0 <br /> Surrogate Dibromofluoromethane 110% 84-122 " <br /> Surrogate 1 2-Dichloroethane-d4 105% 74-135 • <br /> Surrogate Toluene-d8 89% 84-119 " <br /> Surrogate 4-Bromofluoroben2ene 91% 86-119 <br /> MW-2(MNA0375-02)Water Samples! 01/13/04 13 23 Received 01/14/04 10 40 i <br /> Tert-amyl methyl ether ND 10 ug/1 10 4010389 01/21/04 01/21/04 EPA 8260B <br /> Benzene ND 5 0 It " " <br /> Tert-butyl alcohol ND 200 " <br /> Di-isopropyl ether ND 10 <br /> 1,2-Dibromoethane(EDB) ND 5 0 <br /> 1,2-Dichloroethane 22 5 0 <br /> Ethanol ND 1000 " <br /> Ethylbenzene ND 5 0 <br /> Ethyl cert-butyl ether ND 10 <br /> Methyl tent-butyl ether 430 5 0 " <br /> Toluene ND 5 0 " <br /> Xylenes(total) ND 5 0 " <br /> Surrogate Drbromofluoromethane 110% 84-122 " <br /> Surrogate 1,2-Dichloroethane-d4 102% 74-135 " <br /> Surrogate Toluene-d8 93% 84-119 " <br /> Surrogate 4-Bromofluorobenzene 94% 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 /> basis This analytical report must be reproduced in its entirety <br /> Page 6 of 30 <br />