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P <br /> 885 Jarvis Dr <br /> Sequoia Morgan Hill,CA 95037 <br /> (408)776-9600 <br /> s Analytical FAX 8)782-6308 <br /> . www sequoialabs cam <br /> URS Corporation(1] Project BP Heritage 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 Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3B13009-EPA 5030B PIT <br /> Blank(3813009-BLKI) Prepared&Analyzed 02/13/03 <br /> Methyl tert-butyl ether ND 050 ug/1 <br /> Benzene ND 050 " <br /> Toluene ND 050 <br /> $thylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C6-CIO) ND 50 <br /> Surrogate 1 2-Dichloroethane-d4 442 500 884 78-129 <br /> Laboratory Control Sample(31113009-1351) Prepared&Analyzed 02/13/03 <br /> Methyl tert-butyl ether 992 050 ug/l 100 992 63-137 <br /> Benzene 820 050 100 82 0 78-124 <br /> • Toluene 8 92 050 100 992 78-129 <br /> Surrogate 12-Dichloroethane-d4 407 500 814 78-129 <br /> Laboratory Control Sample(3B13009-BS2) Prepared&Analyzed 02/13/03 <br /> Methyl tert-butyl ether 781 0 50 ug/l 9 04 864 63-137 <br /> Benzene 547 050 5 44 101 78-124 <br /> Toluene 325 050 328 991 78-129 <br /> Gasoline Range Organics(C6-CI0) 363 50 440 82 5 70-113 <br /> Surrogate 12-Dichloroethane-d4 388 500 776 78-129 <br /> Matrix Spike(3BI3009-MSI) Source MMA0754-01 Prepared 02/13/03 Analyzed 02/14/03 <br /> Methyl tert-butyl ether 4320 50 ug/l 4000 560 940 0-200 <br /> Benzene 7770 50 4000 4400 842 78-124 <br /> Toluene 4070 50 4000 210 965 78-129 <br /> Surrogate 11-Dichloroethane-d4 475 5 00 950 78-129 <br /> Matrix S ike Dup(3B13009-MSD1) Source.MMA0754-01 Prepared 02/13/03 Analyzed 02/14/03 <br /> Methyl tert-butyl ether 4790 50 ug/l 4000 560 106 0-200 103 200 <br /> Benzene 9620 50 4000 4400 130 78-124 213 12 QM-07,QR-0 <br /> 7 <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 /> 5of10 <br />