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1455 McDowell Blvd North Ste <br /> Sequoia Ptaaluma GA 949544 <br /> (707)792-1865 <br /> ��► Analytical FAX equoi labs co 2 <br /> www sequoialabs com <br /> • <br /> URS Corp-Sacramento Project BP Heritage Site 11191,Stockton,Ca P501283 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number W R36368 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 01/27/05 08 37 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> MW-3(P501283-03)Water Sampled 01/12/05 10 10 Received 01/14/05 14 30 <br /> Tert-amyl methyl ether ND 200 ugll 200 5010267 01/25/05 01/25/05 EPA 82608 <br /> Benzene ND 100 " <br /> Tert-butyl alcohol 7600 4000 " <br /> Di-isopropyl ether ND 200 " <br /> Ethanol ND 20000 <br /> Ethylbenzene ND 100 " <br /> Ethyl tert-butyl ether ND 200 <br /> Methyl tert-butyl ether 4200 100 " <br /> Toluene ND 100 " <br /> Xylenes(total) ND 100 " <br /> Surrogate Dtbromofluoromelhane 94% 84-122 " <br /> Surrogate 1,2-Drchloroethane-d4 106% 74-135 " <br /> Surrogate Toluene-d8 96% 84-119 " <br /> IOSurrogate 4-Bromofluorohenzene 98% 86-119 " <br /> MW-4(P501283-04)Water Sampled 01/12/05 09 30 Received 01/14/05 14 30 <br /> Tert-amyl methyl ether ND 2000 ugn 2000 5010267 01/25/05 01/25/05 EPA 8260B <br /> Benzene ND 1000 " <br /> Tert-butyl alcohol ND 40000 " <br /> Di-isopropyl ether ND 2000 <br /> Ethanol ND 200000 " <br /> Ethylbenzene ND 1000 " <br /> Ethyl tert-butyl ether ND 2000 " <br /> Methyl tee-t-butyl ether 23000 1000 " <br /> Toluene ND 1000 " <br /> Xylenes(total) ND 1400 <br /> Surrogate Drbromofluoromethane 94% 84-122 " <br /> Surrogate 1,2-Drchloroethane-d4 107% 74-135 " <br /> Surrogate Toluene-d8 95% 84-119 " <br /> Surrogate 4-Bromofluorobenzene 97% 86-119 " <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the charn of <br /> custody document Unless otherwise slated results are reported on a wet werght basis <br /> This analytical report must be reproduced in its entirety <br /> Page 5 of 12 <br />