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885 Jams Dr <br /> Sequoia Morgan Hill,CA 95037 <br /> Analytical FAX(408)776- 6408 782-63083M <br /> www sequoialabs can <br /> URS Corporation[1] Project BP Hentage Site#]1191,Stockton,CA MMB0059 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number BP Heritage Site#11191,Stockton,CA Reported <br /> Sacramento CA,95833 Project Manager Vern Elarth 03111101111 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 Linut Units Level Result %REC Limits RPD Linut Notes <br /> Batch 3BI4006-EPA 5030B P/T <br /> Matrix Spike(31114006-MSI) Source-MMB0242-01 Prepared&Analyzed 02/14/03 <br /> Methyl tert-butyl ether 44800 100 ugll 1810 56000 NR 0-200 E QM-4X <br /> Benzene 2700 100 1090 1900 73 4 78-124 QM-07 <br /> Toluene 10800 100 6560 5400 823 78-129 <br /> Gasoline Range Organics(C6-C10) 123000 10000 88000 68000 625 70-113 QM-07 <br /> Surrogate 11-Dichloroethane-d4 4 75 500 95 0 78-129 <br /> Matrix Spike Dup(3B14006-MSD/) Source-MMB0242-01 Prepared&AnaIyzed 02/14Y03 <br /> Methyl tert-butyl ether 42600 100 ug/1 1810 56000 NR 0-200 503 200 E,QM-4X <br /> Benzene 2560 100 1090 1900 60 6 78-124 532 12 QM-07 <br /> Toluene 10100 100 6560 5400 716 78-129 670 10 QM-07 <br /> Gasoline Range Organics(C6-C 10) 110000 10000 88000 68000 477 70-113 1] 2 9 QM-07,QR-0 <br /> . 4 <br /> Surrogate 11-Dichloroethane-d4 459 500 918 78-119 <br /> Batch 3B14027-EPA 5030B PIT <br /> Blank(3BI4027-BLKI) Prepared&Analyzed 02/14/03 <br /> Methyl tert-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-CIO) ND 50 " <br /> Surrogate 12-Dichloroethane-d4 511 500 102 78-129 <br /> Laboratory Control Sample(31114027-11SI) Prepared&Analyzed 02/14/03 <br /> Methyl tert-butyl ether 997 050 ug/I 100 997 63-137 <br /> Benzene 9 36 050 100 936 78-124 <br /> Toluene 9 59 050 too 959 78-129 <br /> Surrogate 12-Dichloroethane-d4 4 76 500 952 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 /> 7of10 <br />