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i <br /> + 1885 Jarvis Drive <br /> 4D Sequoia Morgan Hili CA 95037 <br /> qW Analytical (408)776-9600 <br /> FAX(408)782-6308 <br /> www sequoialabs corn <br /> II <br /> URS Corporation[Arcoll Project BP Heritage#11191,Stockton,CA MOG0813 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number G07WW-0016 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 08/05/05 14 59 <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-3(MOG0813-03)Water Sampled 07/19/05 13 25 Received 07/21/05 09 10 <br /> tert-Amyl methyl ether ND 25 ugA 5 5G28004 07/28/05 07/29/05 EPA 8260B <br /> Benzene ND 25 <br /> tert-Butyl alcohol 5800 100 " <br /> Di-isopropyl ether ND 25 " <br /> Ethanol ND 500 <br /> Ethyl tert-butyl ether ND 25 " <br /> Ethylbenzene ND 25 " <br /> Methyl tert-butyl ether 68 25 " <br /> Toluene ND 25 " <br /> Xylenes(total) ND 25 " <br /> Gasoline Range Organics(C4-C12) ND 250 " <br /> Surrogate 12-Dichloroethane-d4 98% 60-135 " <br /> MW-4(MOG0813-04)Water Sampled 07/19/0514 00 Received 07/21/05 09 10 <br /> tert-Amyl methyl ether ND 250 ugll 500 5G28004 07/28/05 07/29/05 EPA 8260B <br /> lWenzene ND 250 <br /> tent-Butyl alcohol ND 10000 " <br /> Di-isopropyl ether ND 250 " <br /> Ethanol ND 50000 " <br /> Ethyl tert-butyl ether ND 250 " <br /> Ethylbenzene ND 250 " <br /> Methyl tert-butyl ether 11000 250 " <br /> Toluene ND 250 " <br /> Xylenes(total) ND 250 " <br /> Gasoline Range Organics(C4-C12) ND 25000 " <br /> Surrogate I 1-Dichloroelhane-d4 95% 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 4 of 12 <br />