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/ � 8Drive <br /> ,�*�\ Sequoia MorganHill <br /> CA CA 95037 <br /> (408)776 9600 <br /> Analytical FAX(408)782_6308 <br /> WWW sequoialabs com <br /> • <br /> URS Corporation[Arcot] Project ARCO#2186,Stockton,CA M0I0313 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOBZM-0002 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elartb 09/28/05 10 46 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Metbod Note <br /> MW-3(MOI0313-03)Water Sampled 09/08/05 10 37 Received 09/09/05 07 55 <br /> tert-Amyl methyl ether ND 050 ug/l 1 5I20037 09/20/05 09/21/05 EPA 8260B <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 0 50 " <br /> 1,2-Dibromoethane(EDB) ND 0 50 " <br /> 1,2-Dtchloroethane ND 050 " <br /> Etnanol ND 100 <br /> Ethyl tert-butyl ether ND 0 50 " <br /> Ethylbenzene ND 050 <br /> Methyl tent-butyl ether ND 0 50 <br /> Toluene ND 050 <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate 12-Dtchloroethane-d4 81 % 60-135 " <br /> W-4(MOI0313-04)Water Sampled 09/08105 12 43 Received 09/09/05 07 55 <br /> tert-Amyl methyl ether 31 25 ug/1 50 5I20037 09/20/05 09/21/05 EPA 8260E <br /> Benzene ND 25 " <br /> tert-Butyl alcohol ND 1000 " <br /> Di-isopropyl ether ND 25 " <br /> 1,2-Dibromoethane(EDB) ND 25 " <br /> 1,2-Dichloroethane ND 25 " <br /> Ethanol ND 5000 " <br /> Ethyl tert-butyl ether ND 25 " <br /> Ethylbenzene ND 25 " <br /> Methyl tert-butyl ether 4300 25 " <br /> Toluene ND 25 " <br /> Xylenes(total) ND 25 " <br /> Gasoline Range Organics(C4-C12) 4100 2500 PV <br /> Surrogate 12-Dtchloroethane-d4 82% 60-135 " <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed m accordance with the chain of <br /> custody document Unless otherwise stated results are reported on o wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 4 of 12 <br />