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Sequoia Ola Hill,CA 95037 <br /> 8Jarvis Drive <br /> 'a— ) (408) <br /> �7 11 Morgan 776-9600 <br /> Analytical FAX(408)782-6308 <br /> www.sequoialabs.com <br /> URS Corporation[Arco 1] Project:ARCO#0595,CA MPA0141 <br /> 2870 Gateway Oaks Dr.,Ste 300 Project Number:GOBZG-0002 Reported: <br /> Sacramento CA,95833 Project Manager:Vemon P.Elarth 01/18/06 17:37 <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 /> DI-3-51/2'(MPA0141-05)Soil Sampled: 12/29/0514:55 Received:01/04/06 08:00 <br /> tert-Amyl methyl ether ND 0.0050 mg/kg 1 6A12013 01/12/06 01/12/06 EPA 8260B <br /> Benzene ND 0.0050 It 11 1. " <br /> tert-Butyl alcohol 0.039 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 <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 67% 60-125 " <br /> D14-5 1/2(MPA0141-06)Soil Sampled: 12/29/0515:05 Received:01/04/06 08:00 <br /> tert-Amyl methyl ether ND 1.2 mg/kg 50 6A12019 01/12/06 01/12/06 EPA 8260B PF <br /> Benzene ND 2.5 " <br /> tert-Butyl alcohol ND 250 PE <br /> Di-isopropyl ether ND 1.2 PF <br /> 1,2-Dibromoethane(EDB) ND 1.2 " <br /> 1,2-Dichloroethane ND 1.2 " <br /> Ethanol ND 500 IC <br /> Ethyl tert-butyl ether ND 1.2 " <br /> Ethylbenzene 6.6 2.5 " <br /> Methyl tert-butyl ether ND 1.2 " " PF <br /> Toluene 2.7 2.5 " <br /> Xylenes(total) 48 2.5 " <br /> Gasoline Range Organics(C4-C12) 1100 120 " <br /> Surrogate: 1,2-Dichloroethane-d4 103% 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 11 <br />