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Y� 685 Jarvis Drive <br /> Sequoia a Morgan Hill,CA 95037 <br /> (408)776-9600 <br /> Analytical <br /> FAX <br /> 08 <br /> wvw.sequoislabs.com <br /> URS Corporation[Arco I] Project:ARCO#2168,Stockton,CA MOK0608 <br /> 2870 Gateway Oaks Dr„Ste 300 Project Number:G0C81-0010 Reported: <br /> Sacramento CA,95833 Project Manager.Vemon P.Elarth 11/28/05 15:08 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Morgan Hill <br /> l Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Nate <br /> SP-18-20(MOK0608-01)Soil Sampled:11/10/05 08:25 Received: 11/11/05 07:30 <br /> s tert-Amyl methyl ether ND 1.2 mg/kg 50 5K22027 11/22/05 11/23/05 EPA 82608 <br /> Benzene ND 2.5 <br /> tert-Butyl alcohol ND 250 " <br /> Di-isopropyl ether ND 1.2 " <br /> 1,2-Dibromoethane(EDB) ND 1.2 " <br /> 1,2-Dichloroethane ND 1.2 <br /> Ethanol ND 500 <br /> Ethyl tert-butyl ether ND 1.2 " <br /> Ethylbenzene ND 2.5 <br /> Methyl tert-butyl ether ND 1.2 " <br /> Toluene ND 2.5 <br /> Xylenes(total) 9.0 2.5 " <br /> Gasoline Range Organics(C4-C12) 1100 120 " <br /> Surrogate:1,2-Dichloroethane-d4 125% 60-125 <br /> EW-7-20(MOK0608-03)Soil Sampled:11/10/05 10:33 Received: 11/11/05 07:30 <br /> tert-Amyl methyl ether ND 0.0045 mg/kg 0.9 5K16007 11/16/05 11/16/05 EPA 8260B <br /> Benzene ND 0.0045 <br /> tert-Butyl alcohol ND 0.018 <br /> Di-isopropyl ether ND 0.0045 <br /> 1,2-Dibromoethane(EDB) ND 0.0045 " <br /> 1,2-Dichloroethane ND 0.0045 <br /> Ethanol ND 0.090 <br /> Ethyl tert-butyl ether ND 0.0045 " <br /> Ethylbenzene ND 0.0045 " <br /> Methyl tert-butyl ether ND 0.0045 <br /> Toluene ND 0.0045 <br /> Xylenes(total) ND 0.0045 <br /> Gasoline Range Organics(C4-C12) ND 0.090 <br /> Surrogate:1,2-Dichloroethane-d4 114% 60-125 " <br /> Sequoia 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 3 of 9 <br />