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865Chive <br /> Sequoia Morgan Hilll CA CA 95037 <br /> (408)776 9600 <br /> Analytical FAX(408)782-6308 <br /> 0 www sequoialabs tom <br /> URS Corporation[Arco I] Project ARCO#2130,Stockton,CA MOL0602 <br /> I <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOBZK-0002 Reported <br /> Sacramento CA,95833 Project Manager Vernon]? Elarth 01/04/06 16 01 <br /> i <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Morgan Hill <br /> Reporting <br /> Flnyte Result Lund Units Dilution Batch Prepared Analyzed Method Note <br /> I <br /> M5-1B(MOL0602-19)Water Sampled 12/11/05 13 40 Received 12/14/05 08 30 <br /> Cert-Amyl methyl ether ND 050 ug/l I 5L22023 12/22/05 12/23/05 EPA 8260E <br /> Benzene 2 2 0 50 <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 " <br /> 1,2-Dtchloroethane ND 050 " <br /> Ethanol ND 100 <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene 094 0 50 " <br /> Methyl tert-bury!ether ND 0 50 " <br /> Toluene 3 1 050 <br /> Xylenes(total) 4 6 050 " <br /> Gasoline Range Organics(C4-C12) 270 50 <br /> Surrogate 1 2-Dtchloroethane-d4 107% 60-135 <br /> 5-2A(MOL0602-20)Water Sampled 12/11/05 11 50 Received 12/14/05 08 30 <br /> ,qWmrt-Amyl methyl ether ND 050 ug/l I 5L22037 12/22/05 12/23/05 EPA 8260E <br /> Benzene 0 64 050 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 <br /> 1,2-Drchlorocthane 0 55 050 <br /> Ethanol ND 100 " " IC <br /> Ethyl ter/-butyl ether ND 050 <br /> Ethylbenzene ND 050 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene 13 050 " <br /> Xylenes(total) 2 0 050 " <br /> Gasoline Range Organics(C4 C12) ND 50 " <br /> Surrogate 12-Drchloroethane-d4 92% 60-135 <br /> Sequoia Analytical -Morgan Hill The results in this report appl}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 /> 0 This analytical report must be reproduced in its entirety <br /> Page I2 of 28 <br />