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885 Jarvis Drive <br /> Sequoia Morgan Hill,408)776-9600 <br /> Analytical FAX(408)782.6308 <br /> www.sequoialabs.com <br /> Secor-Rancho Cordova(ARCO) Project:ARCO#2133,Stockton,CA MPC0947 <br /> 3017 Kilgore Rd. Suite 100 Project Number:77BP.52133.06.0002 Reported: <br /> Rancho Cordova CA,95670 Project Manager:Brian Carey 04/15/06 12:28 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical- Morgan Hill <br /> Reporting <br /> i <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> PR-2(MPC0947-13)Water Sampled: 03/21/06 18:58 Received: 03/24/0608:20 <br /> tert-Amyl methyl ether ND 0.50 ugll I 6DO3001 04/03/06 04/03/06 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 300 PE <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 /> urrogate: 1,2-Dichloroethane-d4 114% 80-135 <br /> rrogate: Toluene-d8 103% 70-130 " <br /> Surrogate:Dibromofluoromethane 108% 85-130 <br /> Surrogate: 4-Bromofluorobenzene 91 % 60-115 " <br /> BHD-1 (MPC0947-14)Water Sampled: 03/20/06 13:25 Received:03/24/06 08:20 <br /> ter-Amyl methyl ether ND 0.50 ug/I I 6DO3001 04/03/06 04/03/06 EPA 8260B <br /> Benzene ND 0.50 " <br /> tert-Butyl alcohol 230 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 300 PE <br /> Ethyl tert-butyl ether ND 0.50 " <br /> EthY]benzene ND 0.50 " <br /> Methyl tert-butyl ether 3.9 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 109% 80-135 " <br /> Surrogate: Toluene-d8 102% 70-130 <br /> Surrogate:Dibromofluoromethane 106% 85-130 " <br /> Surrogate: 4-Bromofluorobenzene 89% 60-115 " <br /> �equoia 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 9 of 19 <br />