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J, <br /> ggs Jarvis Dr <br /> 4i) Sequoia Mogan Hill,CA 95037 <br /> (408)782-9600 <br /> Analytical <br /> FAX(408)782-6308 <br /> www sequinalabs can <br /> URS Corporation I11 Project BP Hentage Site#11191,Stockton,CA MMB0058 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number BP Heritage Site#11191,Stockton,CA Reported <br /> Sacramento CA,95833 Project Manager Vern Elarth 03/07/03 07 50 <br /> al Purgeable Hydrocarbons (C6-C10) and Volatile Organic Compounds by EPA method 8260B - Quality Con <br /> Sequoia Analytical-Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lirmt Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3B14027-EPA 5030B PIT <br /> Laboratory Control Sample(3B14027-BS2) Prepared&Analyzed 02/14/03 <br /> Methyl tent-butyl ether 8 11 050 ug/l 904 897 63-137 <br /> Benzene 5 17 050 544 950 78-124 <br /> Toluene 303 050 328 924 78-129 <br /> Gasoline Range Organics(C6-C10) 364 50 440 827 70-113 <br /> Surrogate 12-Dichloroethane-d4 473 500 946 78-129 <br /> Matrix Spike(3B14027-MSI) Source 1%4MB0014-11 Prepared 02/14/03 Analyzed 02/15/03 <br /> Methyl tert-butyl ether 8570 500 ug/l 9040 ND 937 0-200 <br /> Benzene 34800 500 5440 30000 882 78-124 <br /> Toluene 56000 500 32800 23000 101 78-129 <br /> Gasoline Range Organics(C6-C10) 493000 50000 440000 150000 790 70-113 <br /> Surrogate 12-Dichloroethane-d4 5 04 500 101 78-129 <br /> Matrix Spike Dap(31314027-MSDI) Source MMB0014-11 Prepared 02/14/03 Analyzed 02/15/03 <br /> Methyl tert butyl ether 9060 500 ug/l 9040 ND 99 1 0-200 5 56 200 <br /> Benzene 35700 500 5440 30000 105 78-124 2 55 12 <br /> Toluene 56100 500 32800 23000 101 78-129 0178 10 <br /> Gasoline Range Organics(C6-C10) 502000 50000 440000 150000 800 70-113 1 81 9 <br /> Surrogate 124lhchloroethane-d4 5 02 500 100 78-129 <br /> Batch 3B16004-EPA 50308 PIT <br /> Blank(3B16004-BLK1) Prepared&Analyzed 02/16/03 <br /> Methyl tent-butyl ether ND 050 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C6-C 10) ND 50 " <br /> Surrogate 12-Dichloroethane-d4 466 500 932 78-129 <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 /> 8 of 10 <br />