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885 Jarvis Drive <br /> Hi <br /> Sequoia Morgan Hill,CA 95037 <br /> 4D <br /> Analytical (408)776-9600 <br /> FAX equoi labs.c 08 <br /> www.sequoialabs.com <br /> f <br /> URS Corporation[Arco!] Project:ARCO#0595,CA MPA0032 <br /> 2870 Gateway Oaks Dr.,Ste 300 Project Number:GOBZG-0002 Reported: <br /> Sacramento CA,95833 Project Manager:Vemon P.Elarth 01/06/06 11:40 <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 No 1, <br /> SP-9-10(MPA0032-05)Soil Sampled: 12/29/05 15:40 Received:01/04/06 08:00 <br /> tert-Amyl methyl ether ND 0.0050 mg/kg 1 6A04046 01/04/06 01/05/06 EPA 8260B <br /> Benzene ND 0.0050 " <br /> tert-Butyl alcohol ND 0.020 " <br /> Di-isopropyl ether ND 0.0050 " <br /> I 1,2-Dibromoethane(EDB) ND 0.0050 " <br /> 1,2-Dichloroethane ND 0.0050 " <br /> Ethanol ND 0.10 c <br /> Ethyl tert-butyl ether ND 0.0050 " <br /> Ethylbenzene ND 0.0050 " <br /> Methyl tert-butyl ether ND 0.0050 " <br /> Toluene ND 0.0050 " <br /> Xylenes(total) ND 0.0050 " <br /> Gasoline Range Organics(C4-C12) ND 0.10 " <br /> Surrogate:1,2-Dichloroethane-d4 125% 60-125 " <br /> SP-11-12(MPA0032-06)Soil Sampled: 12/29/05 15:45 Received:01/04/06 08:00 <br /> tert-Amyl methyl ether ND 0.0050 mg/kg 1.01 6A04046 01/04/06 01/05/06 EPA 8260B <br /> Benzene ND 0.0050 " <br /> tert-Butyl alcohol ND 0,020 " <br /> Di-isopropyl ether ND 0.0050 " <br /> 1,2-Dibromoethane(EDB) ND 0.0050 " <br /> 1,2-Dichloroethane ND 0.0050 " <br /> Ethanol ND 0.10 IC <br /> Ethyl tert-butyl ether ND 0.0050 " <br /> Ethylbenzene ND 0.0050 " <br /> Methyl tert-butyl ether ND 0.0050 " <br /> Toluene ND 0.0050 " <br /> Xylenes(total) ND 0.0050 " <br /> Gasoline Range Organics(C4-C12) ND 0.10 <br /> Surrogate:1,2-Dichloroethane-d4 122% 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 6 of 13 <br />