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i i 885 Jarvis Dr Sequoia Morgan Hill,CA 95037 (408)776-9600 Analytical FAX(408)782 6308 URS Corporation Project BP Heritage Site#11193,Stockton,CA ML10264 500 12th Street,Suite 100 Project Number BP Heritage Site#11193,Stockton,CA Reported Oakland CA,94607 Project Manager Vern Elarth 09/18/02 12 37 BTEX by EPA Method 8260B Sequoia Analytical-Morgan Hill Reporting Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes MW-7(ML10264-05)Water Sampled 09/11/020932 Received 09/12/02 08 20 Benzene ND 0 50 ug/l 1 2I13029 09/13/02 09/13/02 EPA 8260B Toluene ND 050 " " " " " " Ethylbenzene ND 0 50 " Total Xylenes ND 050 Surrogate 12-Dichloroethane-d4 108% 78-129 " VW-1 LI0264-06 Water Sampled 09/11/02 13 15 Received 09/12/02 08 20 R-05 Benzene ND 100 ug11 200 2I13029 09/I3/02 09/13/02 EPA 8260B Toluene ND 100 Ethylbenzene ND 100 " Total Xylenes ND 100 " Surrogate 12-Dichloroethane-d4 106% 78-129 " MW-1R MLI0264-07 Water Sampled 09/11/02 12 55 Received 09/12/02 08 20 R-05 Benzene ND 2 5 ug/I 5 2113029 09/13/02 09/13/02 EPA 8260B 0oluene ND 2 5 " -thylbenzene ND 2 5 " Total Xylenes ND 2 5 " Surrogate 1 2-Dichloroethane-d4 108% 78-129 " MW-2R IO2 -08 Water Sam led 09/11/02 12 34 Received 09/12/02 08 20 Benzene 34 10 ug/l 20 2113029 09/13/02 09/13/02 EPA 8260B Toluene ND 10 Ethylbenzene ND 10 Total Xylenes 24 10 Surrogate 1 2-Dichloroethane-d4 100% 78-129 " Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of custody document Unless otherwise stated results are reported on a wet weight basis This analytical report must be reproduced in its entirety 6 of 39