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1885 Drive <br /> Sequoia Morgan Hill1,,CA CA 95037 <br /> (408)776-9600 <br /> iW Analytical FAX <br /> equosa826308 <br /> www squosala6s coin <br /> • <br /> URS Corporation[Arco I) Project BP Heritage#11194,Tracy,CA MOH0245 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number G07WZ-001 I Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 08/19/0506 53 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Morgan Hill <br /> Repotting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> MW-5(MOH0245-11)Water Sampled 07/29/05 10 400 Received 08/03/05 08 15 <br /> text-Amyl methyl ether ND 050 ug/l 1 5H09043 08/09/05 08/10/05 EPA 82608 <br /> Benzene ND 050 " <br /> tert-Butyl alcohol 21 20 " <br /> Di-tsopropyl ether ND 050 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 050 <br /> Methyl tert-butyl ether 94 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate 1,2-Dichloroethane-d4 93% 60-135 " <br /> MW-6(MOH0245-12)Water Sampled 07/29/05 12 00 Received 08/03/05 08 15 <br /> tert-Amyl methyl ether ND 10 ug/l 2 5H12011 08/12/05 08/12/05 EPA 8260B <br /> nzene ND 10 <br /> Wet-Butyl <br /> alcohol ND 40 <br /> Di-isopropyl ether ND 1 0 " <br /> Ethanol ND 200 <br /> Ethyl tert-butyl ether ND 10 <br /> Ethylbenzene ND 10 " <br /> Methyl tert-butyl ether 19 10 " <br /> Toluene ND 10 " <br /> Xylenes(total) ND 10 " <br /> Gasoline Range Organics(C4-C12) 1600 100 " <br /> Surrogate 1 2-Dichloroelhane-d4 100% 60-135 " <br /> Sequoia 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 /> Page 8 of 16 <br />