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885 Jarvis Drive <br /> Sequoia Morgan Hill,CA 95037 <br /> Ci)— (409)776-9600 <br /> Analytical FAX(408)782-6308 <br /> J www.sequoialabs.com <br /> Secor-Rancho Cordova(ARCO) Project:ARCO#2133,Stockton,CA MPC0947 <br /> 3017 Kilgore Rd. Suite 100 Project Number:77BP.52 13 3.06.0002 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 Note <br /> E-8(MPC0947-07)Water Sampled: 03/20/06 11:44 Received:03/24/06 08:20 <br /> tart-Amyl methyl ether ND 0.50 ug/l 1 6DO3001 04/03/06 04/03/06 EPA 8260E <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 1.1 0.50 " <br /> Toluene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Gasoline Range Organics(C4-C 12) ND 50 " <br /> arrogate: 1,2-Dichloroethane-d4 106% 80-135 <br /> rrogate: Toluene-d8 101 % 70-130 <br /> Surrogate: Dibromofluoromethane 105% 85-130 <br /> Surrogate: 4-Bromofluorobenzene 90% 60-115 " <br /> E-9(MPC0947-08)Water Sampled: 03/22/06 17:40 Received:03/24/06 08:20 <br /> tert-Amyl methyl ether ND 0.50 ug/1 1 6DO5005 04/05/06 04/05/06 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 0.92 0.50 " <br /> Methyl tert-butyl ether 1.1 0.50 " <br /> Toluene ND 0.50 " <br /> Xylenes(total) 2.1 0.50 " <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate: 1,2-Dichloroethane-d4 116% 80-135 <br /> Surrogate: Toluene-d8 92% 70-130 11 " " <br />' Surrogate: Dibromofluoromethane 102% 85-130 " <br /> Surrogate: 4-Bromofluorobenzene 92% 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 6 of 19 <br />