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885 Jarvis Drive <br /> '' Sequoia Morgan Hill,CA 95037 <br /> a— Analytical (408)776-9600 <br /> 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 /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Nate <br /> E-10(MPC0947-09)Water Sampled: 03/22/06 17:08 Received:03/24/06 08:20 <br /> tert-Amyl methyl ether ND 5.0 ug/I 10 6D05005 04/05/06 04/05/06 EPA 8260B <br /> Benzene ND 5.0 " <br /> tert-Butyl alcohol ND 200 " <br /> Di-isopropyl ether ND 5.0 " <br /> 1,2-Dibromoethane(EDB) ND 5.0 " <br /> 1,2-Dichloroethane ND 5.0 " <br /> Ethanol ND 3000 PE <br /> Ethyl tent-butyl ether ND 5.0 " <br /> Ethylbenzene ND 5.0 " <br /> Methyl tert-butyl ether 7.1 5.0 " <br /> Toluene ND 5.0 " <br /> Xylenes(total) 11 5.0 " <br /> Gasoline Range Organics(C4-C12) ND 500 " <br /> urrogate: 1,2-Dichloroethane-d4 118% 80-135 " <br /> rrogate: Toluene-d8 95% 70-130 <br /> � " <br /> 11 <br /> Surrogate: Dibromofluoromethane 107% 85-130 <br /> Surrogate: 4-Bromofluorobenzene 90% 60-115 <br /> E-11 (MPC0947-10)Water Sampled: 03/22/06 18:29 Received:03124/0608:20 <br /> tent-Amyl methyl ether ND 0.50 ug/1 I 6DO5005 04/05/06 04//05106 EPA 826013 <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 tent-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 119% 80-135 " <br /> Surrogate: Toluene-d8 93 % 70-130 " <br /> Surrogate:Dibromofluoromethane 107% 85-130 <br /> Surrogate: 4-Bromofluorobenzene 88% 60-115 " <br /> e toia Analytical- Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain <br /> 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 7 of 19- <br />