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885 Drive <br /> Sequoia Morgan Hill CAs95037 <br /> 4D (408)776-9600 <br /> 11W Analytical FAX(408)782-6308 <br /> www sequoialabs com <br /> URS Corporation(Arco 1 Project ARCO#6100,Tracey,CA MPC 1103 <br /> 2870 Gateway Oaks Dr Ste 300 Project Number GOC I Y-0015 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 04/23/06 11 43 <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 /> MW-10(MPC1103-05)Water Sampled 03/28/06 09 33 Received 03/29/06 07 45 <br /> tert-Amyl methyl ether ND 25 ug/I 50 6DI 1008 04/11/06 04/11/06 EPA 82608 <br /> Benzene 2600 25 " <br /> tent-Butyl alcohol ND 1000 <br /> Di-isopropyl ether ND 25 " <br /> 1,2-Dtbromoethane(EDB) ND 25 <br /> 1,2-Dtchloroethane 56 25 " <br /> Ethanol ND 15000 " <br /> Ethyl tent-butyl ether ND 25 " <br /> Ethylbenzene 72 25 <br /> Methyl tert-butyl ether ND 25 <br /> Toluene 490 25 " <br /> Xylenes(total) 1300 25 <br /> Gasoline Range Organics(C4-C12) 14000 2500 " <br /> Surrogate 12-Dtchloroethane-d4 91 % 80-135 " <br /> 90ggate Toluene-d8 99% 70-130 <br /> ale Dibromofluoromethane 92% 85-130 <br /> Surrogate 4-Bromofluorobenzene 94% 60-115 <br /> MW-12 (MPC1103-06)Water Sampled 03/28/060925 Received 03/29/060745 <br /> tert-Amyl methyl ether ND 250 ug/l 500 6Dl 1008 04/11/06 04/11/06 EPA 82608 <br /> Benzene 11000 250 " <br /> tert-Butyl alcohol ND 10000 " <br /> Di-isopropyl ether ND 250 " <br /> 1,2-Dtbromoethane(EDB) ND 250 " <br /> 1,2-Dtchloroethane ND 250 " <br /> Ethanol ND 150000 <br /> Ethyl tert-butyl ether ND 250 <br /> Ethylbenzene 1300 250 " <br /> Methyl tert-butyl ether ND 250 <br /> Toluene 7500 250 " <br /> Xylenes(total) 5900 250 " <br /> Gasoline Range Organics(C4-C12) 42000 25000 <br /> Surrogate 12-Dtchloroethane-d4 88% 80-135 " <br /> Surrogate Toluene-d8 96% 70-130 " " <br /> Surrogate Dtbromofluoromethane 95% 85-130 " <br /> Surrogate 4-Bromofluorobenzene 91 % 60-115 <br /> uoia Analytical-Morgan Hill The results in this report apply to the samples analy_ed in accordance+i,ith 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 5 of 1 1 <br />