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Dri <br /> a_ _� (408) <br /> 8855037Sequoia MorganHdlCA CA 95037 7300 <br /> Analytical FAX(408)78282 6308 <br /> www sequoialabs com <br /> URS Corporation[Arcol] Project,ARCO#2130,Stockton,CA MOL0602 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOBZK-0002 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 01/04/06 16 01 <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 /> MS-2B(MOL0602-21)Water Sampled 12/11/05 12 10 Received 12/14/05 08 30 <br /> tert-Amyl methyl ether ND 0 50 ug/1 1 5L22037 12/22/05 12/23105 EPA 8260B <br /> Benzene ND 0 50 " <br /> tert-Butyl alcohol ND 20 " <br /> Dr-isopropyl ether ND 050 " <br /> 1,2-Dtchloroethane ND 050 " <br /> Ethanol ND 100 IC <br /> Ethyl cert-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tert-butyl ether ND 0 50 <br /> Toluene 0 56 0 50 " <br /> Xylenes(total) 1 1 050 " <br /> Gasoline Range Organics(C4-C 12) ND 50 " <br /> Surrogate 1 2-Dtchloroethane-d4 78% 60-135 <br /> AIM-S-IA(MOL0601-22)Water Sampled 12/11/05 12 35 Received 12/14/05 08 30 <br /> Amyl methyl ether ND 10 ug/l 2 5L22037 12/22/05 12/23/05 EPA 8260B <br /> Benzene 38 10 " <br /> tert-Butyl alcohol ND 40 " <br /> Di-isopropyl ether ND 1 0 <br /> 1,2-Dichloroethane 2 2 1 0 " <br /> Ethanol ND 200 IC <br /> Ethyl tert-butyl ether ND 1 0 " <br /> Ethylbenzene 16 10 " <br /> Methyl tert-butyl ether 81 1 0 " <br /> Toluene 9 4 1 0 " <br /> Xylenes(total) 38 1 0 " <br /> Gasoline Range Organics(C4-C12) 360 100 <br /> Surrogate 1 2-Dtchloroethane-d4 96% 60-135 <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 13 of 28 <br />