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885 Jarvis Drive <br /> Sequoia Morgan Hill,CA 95037 <br /> (409)776-9600 <br /> Analytical FAX(408)782-6308 <br /> www.sequoialabs.com <br /> Secor-Rancho Cordova(ARCO) Project:ARCO#2133,Stockton,CA M00O299 <br /> 3017 Kilgore Rd. Suite 100 Project Number:N/P Reported: <br /> Rancho Cordova CA,95670 Project Manager:Rusty Benkosky 03/23/05 13:43 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Morgan Hill <br /> Reporting <br /> Analyte Resutt Limit Units Dilution Batch Prepared Analyzed Method Note <br /> E-10(M00O299-07)Water Sampled:03/08/05 12:45 Received:03/08/05 17:30 <br /> tert-Amyl methyl ether ND 0.50 ug/I l 5C18007 03/18/05 03/19/05 EPA 8260B <br /> Benzene 1.0 0.50 " <br /> tert-Butyl alcohol 140 20 " <br /> Di-isopropyl ether ND 0.50 " <br /> 1,2-Dibromoethane(EDB) ND 0.50 " <br /> 1,2-Dichloroethane ND 0.50 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 0.50 " <br /> Ethylbenzene 0.79 0.50 " <br /> Methyl tert-butyl ether 3.8 0.50 " <br /> Toluene ND 0.50 " <br /> Xylenes(total) 1.4 0.50 " <br /> Gasoline Range Organics(C4-C12) 160 50 " <br /> Surrogate: 1,2-Dic1loroethane-d4 81 % 60-135 <br /> . E-11 (M00O299-08)Water Sampled: 03/08/05 09:30 Received:03/08/05 17:30 <br /> tort-Amyl methyl ether ND 0.50 ug/l 1 5C18007 03/18/05 03/19/05 EPA 8260B <br /> Benzene ND 0.50 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 0.50 " <br /> 1,2-Dibromoethane(EDB) ND 0.50 " <br /> 1,2-Dichloroethane ND 0.50 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 0.50 " <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 /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate: 1,2-Dichloroethane-d4 88% 60-135 <br /> Sequoia Analytical -Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. Unless otherwise stated,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> Page 6 of 17 <br />