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885 Jarvis Dnve <br /> Sequoia Morgan F-G43 CA 95037037 <br /> (408)776-9604 <br /> a— —NFAXAnalytical (408)792-6309 <br /> www sequoialabs abs co tom <br /> URS Corporation(ArcoII Project BP#11194,Tracy,CA NINHO211 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number N1P Reported <br /> Sacramento CA,95833 Project Manager Jeff Brooks 08/25/04 13 04 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Morgan Hill <br /> Reporting <br /> Analyte Result l.imrt Units Dilution Batch Prepared Analyzed Method Note <br /> MW4(MNH0211-14)Water Sampled 07/30/041300 Received 08/04/04 09 30 <br /> tert-Amyl methyl ether ND 050 USA 1 41412022 08/12/04 08/12/04 EPA 8260B <br /> Benzene 0 53 0 50 " <br /> tent-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 0 50 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene 0 69 050 <br /> Methyl tert-butyl ether 31 0 50 " <br /> Toluene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-C12) 270 50 <br /> Surrogate 1,2-Dichloroethane-d4 85% 78-129 " <br /> MW-6(MNH0211-15)Water Sampled 07/30/0413 15 Received 08/04/04 09 30 <br /> 46 rt <br /> -Amyl methyl ether ND 25 ug/l 50 41412042 48/12/04 08/12/04 EPA 8260B <br /> enzene ND 25 <br /> tert-Butyl alcohol ND 1000 " <br /> Di-isopropyl ether ND 25 " <br /> Ethanol ND 5000 " <br /> Ethyl tert-butyl ether ND 25 " <br /> Ethylbenzene ND 25 " <br /> Methyl tert-butyl ether 28 25 " <br /> Toluene ND 25 " <br /> Xylenes(total) ND 25 " <br /> Gasoline Range Organics(C4-C12) 5500 2500 " <br /> Surrogate 12-Dichloroethane-d4 95% 78-129 " <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 9 of 16 <br />