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s <br /> • $85 Jarvis Dr <br /> wf, Sequoia j Morgan Hill,CA 95037 <br /> Analytical FAX(408)776-9600 <br /> (408)782-6308 <br /> www sequotalabs can <br /> URS Corporation[I] Project BP Hentage Site 411191,Stockton,CA MMB0058 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number BP Hentage 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 Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3BI3009-PPA 5030B PIT <br /> Matrix Spike Dup(31313009-MSDI) Source MMA0754-01 Prepared 02/13/03 Analyzed 02/14/03 <br /> Toluene 4690 50 ug/l 4000 210 112 78-129 142 10 QR-07 <br /> Surrogate 12-Drchloroethane-d4 471 500 942 78-129 <br /> Batch 3B14006-PPA 5030B PIT <br /> Blank(3B14006-BLKI) Prepared&Analyzed 02/14/03 <br /> Methyl tert-butyl ether ND 050 ug/1 <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 <br /> Gasoline Range Organics(C6-C 10) ND 50 " <br /> • Surrogate 12-Drchloroethane-d4 472 " 500 94 4 78-129 <br /> Laboratory Control Sample(3B14006-BSI) Prepared&Analyzed 02/14/03 <br /> Methyl tert-butyl ether 123 0 50 ug/I 100 123 63-137 <br /> Benzene 10 0 050 100 100 78-124 <br /> Toluene 105 050 100 105 78-129 <br /> Surrogate 1 2-Drchloroethane-d4 4 77 500 954 78-129 <br /> Laboratory Control Sample(3B14006-BS2) Prepared&Analyzed 02/14/03 <br /> Methyl tent-butyl ether 7 84 0 50 ug/1 904 86 7 63-137 <br /> Benzene 528 050 544 97 1 78-124 <br /> Toluene 31 8 050 328 970 78-129 <br /> Gasoline Range Organics(C6-CID) 390 50 440 88 6 70-113 <br /> Surrogate 1 1-Drchloroethane-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 /> 6of10 <br />