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(D885 Jarvis DriveSequoia Morgantlill CA 95037 <br /> (408)776 9600 <br /> Analytical FAX(408)782 6308 <br /> www sequotalabs corn <br /> URS Corporation FArcoll Project ARCO#5469, Stockton,CA M000479 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number G09JZ-0290 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 04/07/05 12 53 <br /> Volatile Orgame Compounds by EPA Method 8260B <br /> Sequoia Analytical -Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> MW-3(M000479-03)Water Sampled 03/16/05 07 50 Received 03/17/05 11 09 <br /> tert-Amyl methyl ether ND 050 ug/l 1 5C28010 03/28/05 03/28/05 EPA 8260E <br /> Benzene ND 0 50 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> 1,2-Dichloroethane ND 050 " <br /> Ethanol ND 100 1C <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> Methyl tert-butyl ether 2 1 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> IWagate 12-Dichloroethane-d4 99% 60-135 <br /> 4(M000479-04)Water Sampled 03/16/05 08 10 Received 03/17/05 11 09 I <br /> tert-Amyl methyl ether ND 10 ug/1 20 5C28010 03/28/05 03/28/05 EPA 8260B <br /> Benzene 160 10 " <br /> tert-Butyl alcohol ND 400 " <br /> Di-isopropyl ether ND 10 " <br /> l,2-Dibromoethane(EDB) ND 10 " <br /> 1,2-Dichloroethane ND 10 " <br /> Ethanol ND 2000 " <br /> Ethyl tert-butyl ether ND 10 " <br /> Ethylbenzene ND 10 " <br /> Toluene ND 10 " <br /> Xylenes(total) ND 10 " <br /> Gasoline Range Organics(C4-C12) 3900 1000 PV <br /> Surrogate 1,2-Dichloroethane-d4 96% 60-135 <br /> uoia 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 he reproduced in its entirety <br /> Page 6 of 30 <br />