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SC 885 Jarvis Drive <br /> e(]El O to Morgan Hil] CA 450375037 <br /> r (408)776-9600 <br /> Analytical FAX(408)782 6308 <br /> J www sequoialabs coin <br /> URS Corporation [ArcoI I Project ARCO#5469,Stockton,CA M0I0324 <br /> 2870 Gateway Oaks Dr Ste 300 Project Number GOB7P-0002 Reportcd <br /> Sacramento CA,95833 Project Manager Jay Johnson 09/28/05 09 43 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Morgan Hill <br /> Reporting <br /> Analyte Result Lomat Units Dilution Batch Prepared Analyzed Method Note <br /> MW-7(MOI0324-07)Water Sampled 09/08/05 03 22 Received 09/09/05 07 55 <br /> tert-Amyl methyl ether ND 050 ug/l 1 5115058 09/15/05 09/16/05 EPA 8260B <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND 20 <br /> Di-isopropyl ether ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 <br /> 1,2-Dichloroethane 067 050 " <br /> Ethanol ND 100 <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 <br /> Gasoline Range Organics(C4-C 12) ND 50 <br /> Surrogate 1,2-Dichloroethane-d4 67% 60-135 <br /> i <br /> *8(MO10324-08)Water Sampled 09/08/050434 Received 09/09/05 07 55 <br /> tent-Amyl methyl ether ND 50 ug/I 100 5121005 09/21/05 09/21/05 EPA 8260B <br /> Benzene ND 50 " <br /> tert-Butyl alcohol ND 2000 " <br /> Di-isopropyl ether ND 50 " <br /> 1,2-Dibromoethane(EDB) ND 50 " <br /> 1,2-Dtchloroethane ND 50 " <br /> Ethanol ND 10000 " <br /> Ethyl tert-butyl ether ND 50 " <br /> Ethylbenzene ND 50 " <br /> Methyl tert-butyl ether 9500 50 " <br /> Toluene ND 50 " <br /> Xylenes(total) ND 50 " <br /> Gasoline Range Organics(C4-C12) 6900 5000 " " " PV <br /> Surrogate 1 2-Dtchloroethane-d4 104% 60-135 " <br /> oroia 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 /> 7 of I <br /> Page 8 <br />