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a— )— (885 Jarvis Drive <br /> Sequoia Morgan Hill,CA 95037 <br /> Analytical FAX <br /> 408)776-9600 <br /> (408)782-5308 <br /> www.sequoialabs.com <br /> Secor- Rancho Cordova(ARCO) ProjectARCO 42133, Stockton,CA MPC0947 <br /> 3017 Kilgore Rd. Suite 100 Project Nwnber.77BP.52133.06.0002 Reported: <br /> Rancho Cordova CA,95670 Project Manager,Brian Carey 04/l5/06 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 /> MW-2(MPC0947-17)Water Sampled:03/22/06 18:20 Received:03/24/06 08:20 <br /> tert-Amyl methyl ether ND 0.50 ug/I 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 0.56 0.50 " <br /> Ethanol ND 300 PE <br /> Ethyl ted-butyl ether ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Methyl tert-butyl ether 0.84 0.50 " <br /> Toluene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> rrogate: 1,1-Dichloroethane-d4 112% 80-135 <br /> rrogate: Toluene-d8 96% 70-130 " <br /> Surrogate: Dibromofluoromethane 99% 85-130 <br /> Surrogate: 4-Bromofluorobenzene 88% 60-115 " <br /> MW-3 (MPC0947-18)Water Sampled:03/21106 16:25 Received:03/24/06 08:20 <br /> tent-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 /> l,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 /> Surrogate: 42-Dichloroethane-d4 111 % 80-135 " <br /> Surrogate: Toluene-d8 102% .70-130 <br /> Surrogate: Dibromofluoromethane 107% 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 11 of 19 <br />