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885 Jarvis Dr <br /> 4D Sequoia Mogan Hill,CA 95037 <br /> Analytical FAX(408408)776- 4600 <br /> 782-6308 <br /> www sequolalabs ccm <br /> URS Corporation[1) Project BP Hentage Site 411194,Tracy,CA MLKOI 11 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number BP Hcntage Site 011194,Tracy,CA Reported <br /> Sacramento CA,95833 Project Manager Vem Earth 11/24/02 14 29 <br /> Total Purgeable Hydrocarbons (C6-CIO) by EPA 8015B modified, BTEXM by EPA 8021B- Quality Control <br /> Sequoia Analytical -Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Lirrut Notes <br /> Batch 2K14001 -EPA 5030B PIT <br /> Blank(2K14001-BLKI) Prepared&Analyzed 11/14/02 <br /> Gasoline Range Organics(C6-C10) ND 50 ugll <br /> Benzene ND 050 " <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 25 <br /> Surrogate a a a-Trrfluorotoluene 7 95 100 79 5 55-142 <br /> Laboratory Control Sample(2K14001-BSI) Prepared&Analyzed 11/14/02 <br /> Benzene 109 050 ug/1 100 109 68-140 <br /> Toluene 106 050 100 106 76-127 <br /> &thylbenzene 109 050 " 100 109 77-130 <br /> ylenes(total) 321 050 300 107 78-128 <br /> Surrogate a a a-Trrfluorotoluene 120 100 120 55-142 <br /> Laboratory Control Sam le(2KI4001-BS2) Prepared&Analyzed 11/14/02 <br /> Gasoline Range Organics(C6-C10) 280 50 ug/l 250 112 62-134 <br /> Surrogate a a a-Trifluorotoluene J22 " 100 122 55-142 <br /> Matrix Spike(2K14001-MSI) Source MLKOI II-01 Prepared 11/14/02 Analyzed 11/15/02 <br /> Gasoline Range Organics(C6-C10) 426 50 ug/i 550 ND 775 62-134 <br /> Benzene 7 44 050 660 ND 113 68-140 <br /> Toluene 373 050 397 ND 940 76-127 <br /> Ethylbenzene 8 16 050 920 ND 887 77-130 <br /> Xylenes(total) 39 7 050 46 1 ND 861 78-129 <br /> Surrogate a a a-Trifluorotoluene 102 100 102 55-142 <br /> Matrix Spike Dup(2K14001-MSD1) Source MLK011I-01 Prepared 11/14/02 Analyzed 11/15/02 _ <br /> Gasoline Range Organics(C6-C 10) 412 50 ug/I 550 ND 749 62-134 3 34 41 <br /> Benzene 8 18 050 " 6 60 ND 124 68-140 948 30 <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 an a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> 8 of 10 <br />