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885 Jarvis Drive <br /> Hill CA 95037 <br /> Sequoia Mo��(408)77&9600 <br /> FAX Analytical wwseq oialab6308 <br /> www sequotaEabs corn <br /> URS Corporation[Arco]] Project BP Hentage#1 1194,Tracy,CA MOE0217 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number G07WZ-0011 Reported <br /> Sacramento CA,95833 Project Manager Jeff Brooks 05/19/05 16 42 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Hatch Prepared Analyzed Method Note <br /> MW-6(MOE0217-03RE1)Water Sampled 04/29/05 12 15 Received 05/05/0512 28 <br /> tent-Amyl methyl ether ND 10 ug/1 20 5E13005 05/13/05 05/13/05 EPA 8260B <br /> Benzene 12 10 " <br /> tert-Butyl alcohol ND 400 " <br /> Di-isopropyl ether ND 10 " <br /> Ethanol ND 2000 " <br /> Ethyl tert-butyl ether ND 10 <br /> Ethylbenzene ND 10 " <br /> Methyl tert-butyl ether ND 10 " <br /> Toluene ND 10 <br /> Xylenes(total) 15 10 " <br /> Gasoline Range Organics(C4-C12) 2500 1000 " <br /> Surrogate 1 2-Dichloroethane-d4 106% 60-135 " <br /> AMW-3(MOE0217-04)Water Sampled 04/29/05 12 40 Received 05/05/05 12 28 <br /> tert-Amyl methyl ether ND 0 50 ug/1 1 SE12009 05/12/05 05/12/05 EPA 826013 <br /> Benzene ND 0 50 " <br /> tert-Butyl alcohol ND 20 <br /> Dr-isopropyl ether ND 050 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 0 50 <br /> Methyl tert-butyl ether 6 0 0 50 <br /> Toluene ND 0 50 " <br /> Xylenes(total) ND 0 50 <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate 1,2-Dichloroethane-d4 86% 60-135 " <br /> Sequoia Analytical-Morgan Hall 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 /> Ats analytical report must be reproduced tit its entirely <br /> Page 4 of 10 <br />