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Sequoia i Jarvis Drtve <br /> 5037 <br /> Morgan Hill <br /> Hll CA 95037 <br /> Analytical FAX <br /> ,�Df408)7729600 <br /> (408)7826308 <br /> www sequoiallaabs corn <br /> URS Corporation lArcol l Project ARCO 45469,Stockton,CA MPF0114 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOBZP-0010 deported <br /> Sacramento CA,95833 Project Manager Jay Johnson 06/30/06 11 12 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical- Morgan Hili <br /> Reporung <br /> Analyte Result Ltmtt Units Dilution Batch Prepared Analyzed Method Note <br /> MW-3(MPF0114-03)Water Sampled 05/30/06 07 20 Received 05/31/06 08 30 <br /> tert-Amyl methyl ether ND 050 ug/l I 6FO7022 06/07/06 06/07/06 EPA 8260B <br /> Benzene ND 0 50 " <br /> tert-Butyl alcohol ND 20 <br /> Di-isopropyl ether ND 0 50 " <br /> 1,2-Dibromoethane(EDB) ND 0 50 <br /> 1 2-Dichloroethane ND 050 <br /> Ethanol ND 300 " <br /> Ethyl tert-butyl ether ND 0 50 " <br /> Ethylbenzene ND 050 " <br /> Methyl tert-butyl ether 14 050 <br /> Toluene ND 050 <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-C 12) ND 50 <br /> rogate 1,2-Dichloroethane-d4 90% 60-145Aak <br /> rogate Toluene-d8 91 % 70-130 <br /> 1wrogute Dibromofluoromethane 94% 75-130 <br /> Surrogate 4-Bromofluorobenzene 88% 60-115 <br /> MW-4(MPFOl14-04)Water Sampled 05/30/06 09 00 Received 05/31/06 08 30 <br /> tert-Amyl methyl ether ND 5 0 ugA 10 6FO7022 06/07/06 06/08/06 EPA 8260E <br /> Benzene ND 5 0 " <br /> tert-Butyl alcohol ND 200 " <br /> Di-isopropyl ether ND 50 " <br /> 1,2-Dibromoethane(EDB) ND 5 0 " <br /> I 2-Dichloroethane ND 5 0 " <br /> Ethanol ND 3000 " <br /> Ethyl tert-butyl ether ND 5 0 <br /> Ethylbenzene ND 5 0 " <br /> Methyl tert-butyl ether 970 5 0 " <br /> Toluene ND 5 0 " <br /> Xylenes(total) ND 5 0 <br /> Gasoline Range Organics(C4-C12) 850 500 " <br /> Surrogate 1 2-Dichloroelhane-d4 92% 60-145 <br /> Surrogate Toluene-d8 91 % 70-130 " <br /> Surrogate Dibromofluoromelhane 95% 75-130 <br /> Surrogate 4-Bromofluorobenzene 94% 60-115 <br /> Sequoia Analytical- Morgan Hill The results in this report apply to the samples analyzed in accordance weth 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 5 of 20 <br />