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885 Jarvis Drive <br /> Sequoia Morgan Hill,CA 95037 <br /> iW Analytical tical (408)776-9600 <br /> I' FAX(408)782-6308 <br /> J <br /> www.scquoialabs.com <br /> I <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 /> MW-4(MPC0947-19)Water Sampled:03/21/06 16:03 Received:03/24/06 08:20 <br /> tert-Amyl methyl ether ND 0.50 ug/l 1 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 /> srrogate: 1,.2-Dichloroethane-d4 113% 80-135 <br /> ,I <br /> 46rrogate: Toluene-d8 96% 70-130 " <br /> Surrogate: Dibromofluoromethane 105% 85-130 " <br /> Surrogate: 4-Bromofluorobenzene 92 % 60-115 " <br /> MW-5(MPC0947-20)Water Sampled:03/21/06 15:23 Received: 03/24/06 08:20 <br /> tert-Amyl methyl ether ND 0.50 ug/l 1 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 tent-butyl ether ND 0.50 " <br /> Ethylbenzene ND 0.50 IF " <br /> Methyl tert-butyl ether ND 0.50 IF 1. " " " " <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 112% 80-135 " " <br /> Surrogate: Toluene-d8 100% 70-130 <br /> Surrogate: Dibromofluoromethane 105% 85-130 " <br /> Surrogate: 4-Bromofluorobenzene 89% 60-115 IF <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 wel weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> .Page 12 of 19 <br />