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' 885 Jarvis Drive <br /> Sequoia Morgan Hill95037 <br /> (406)77 77 6-9b00-9600 <br /> FAX <br /> Analytical wwwseqww.seq o782-6308 <br /> ui <br /> alabs,com <br /> I, URS Corporation[Arco II Project: ARCO#0548,Stockton,Ca MNH0053 <br /> 2870 Gateway Oaks Dr.,Ste 300 Project Number: NIP Reported: <br /> ' Sacramento CA,95833 Project Manager: Vernon P.Elarth 08/06/04 16:20 <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 /> ' VW-3(MNH0053-09)Water Sampled:08/03/04 10:35 Received: 08/04/04 09:30 <br /> i tert-Amyl methyl ether ND 5.0 ug/l 10 41J06002 08/06/04 08/06/04 EPA 8260B <br /> Benzene 160 5.0 " <br /> tert-Butyl alcohol ND 200 " <br /> Di-isopropyl ether ND 5.0 " <br /> 1,2-Dichloroethane 29 5.0 " <br /> Ethanol ND 1000 " <br /> Ethyl tert-butyl ether ND 5.0 " <br /> Ethylbenzene 510 5.0 " <br /> Methyl tert-butyl ether 6.5 5.0 " <br /> ' Toluene ND 5.0 <br /> Xylenes(total) 1100 5.0 " <br /> Gasoline Range Organics(C4-C12) 7000 500 " <br /> Surrogate: 1,2-Dichloroethane-d4 101 % 78-129 " <br /> VW-4(MNH0053-10)Water Sampled:08/03/04 07:38 Received:08/04/04 09.30 <br /> tert-Amyl methyl ether ND 0.50 ug/l 1 4HO6002 08/06/04 08/06/04 EPA 82608 <br /> Benzene ND 0.50 <br /> tert-Butyl alcohol ND 20 <br /> Di-isopropyl ether ND 0.50 <br /> 1,2-Dichloroethane 3.4 0.50 " <br /> Ethanol ND 100 <br /> Ethyl tert-butyl ether ND 0.50 <br /> Ethylbenzene ND 0.50 " <br /> Methyl tert-butyl ether 55 0.50 " <br /> ' Toluene ND 0.50 <br /> Xylenes(total) ND 0.50 " <br /> Gasoline Range Organics(C4-C12) 62 50 " <br /> ' Surrogate: 1,2-Dichloroethane-d4 99% 78-129 <br /> i� <br /> equoia 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 7 of 16 <br />