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i <br /> Sequoia 885 Jarvis Drive <br /> Morgan Hill,CA 95037 <br /> Analytical (408)776-9600 <br /> FAX(468)782-6308 <br /> www.scquoialabs.com <br /> URS Corporation[Arco]] Project:ARCO#2168,Stockton,CA <br /> 2870 Gateway Oaks Dr.,Ste 300 MOK0900 <br /> Project Number:GOC81-0010 k Reported:Sacramento CA,95833 Project ManagerNernon P.Elarth <br /> 11/30/05 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 <br /> Note <br /> EW-10-20(MOK0900-01)Soil Sampled:11/14/0509:05 Received:11/17/05 08:30 <br /> tent-Amyl methyl ether ND 0.0040 mg/kg 0.81 5K23041 11/23/05 11/24/05 EPA 8260B <br /> Benzene ND 0.0040 " <br /> ter-Butyl alcohol ND 0.016 <br /> Di-isopropyl ether ND 0.0040 <br /> 1,2-Dibromoethane(EDB) ND 0.0040 " <br /> 1,2-Dichloroethane ND 0.0040 <br /> Ethanol ND 0.081 <br /> z Ethyl tert-butyl ether ND 0.0040 <br /> Ethylbenzene ND 0.0040 « <br /> Methyl teirt-butyl ether ND 0.0040 <br /> Toluene ND 0.0040 '1 <br /> Xylenes(total) ND 0.0040 <br /> Gasoline Range Organics(C4-C12) ND 0.081 <br /> Surrogate:'1,2-Dichloroethane-d4 87% 60-125 <br /> SP-21-20(MOK0900-02)Soil Sampled: 11/14/05 11:20 Received: 11/17/05 08:30 <br /> Cert-Amyl methyl ether ND 0.0054 mg/kg 1.07 5K23041 11/23/05 11/24/05 EPA 8260E <br /> Benzene ND 0.0054 " <br /> tert-Butyl alcohol ND 0.021 " <br /> Di-isopropyl ether ND 0.0054 " i€ <br /> I,2-Dibromoethane(EDB) ND 0.0054 " <br /> 1,2-Dichloroethane ND 0.0054 <br /> Ethanol ND 0.11 " <br /> Ethyl tert-butyl ether ND 0.0054 " <br /> Ethylbenzene ND 0.0054 <br /> Methyl tert-butyl ether ND 0.0054 <br /> Toluene ND 0.0054 " <br /> Xylenes(total) ND 0.0054 " <br /> Surrogate:1,2-Dichloroethane-d4 80% 60-125 " <br /> Gasoline Range Organics(C4-C12) 14 2.5 5K28023 11/28/05 11/28/05 <br /> Surrogate: 1,2-Dichloroethane-d4 118% 60-125 " <br /> 1f <br /> d <br /> i <br /> I <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance will,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 12 <br /> �r i <br />