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a Q w <br /> S(r 885 Jarvis Dr <br /> equoia Morgan Hill,CA 95037 <br /> (448)776-9600 <br /> 4W Analytical <br /> FAX(408)782-6306 <br /> www sequoialabs can <br /> Secor-Rancho Cordova Project ARCO#595,Stockton,CA MMA0549 <br /> 3017 Kilgore Rd Suite 100 Project Number ARCO#595,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 02/25/03 10 42 <br /> Total Purgeable Hydrocarbons (C6-C10) 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 3A31002-EPA 5030B [P/TJ <br /> Matrix Spike(3A31002-MSI) Source MMA0549-04 Prepared 01/31/03 Analyzed 02/01/03 <br /> Gasoline Range Organics(C6-C 10) 456 50 ug/I 550 ND 829 62-134 <br /> Benzene 875 050 6 80 ND 129 68-140 <br /> Toluene 324 050 410 ND 787 76-127 <br /> Ethylbenzene 855 050 9 80 ND 872 77-130 <br /> Xylenes(total) 406 050 47 9 ND 848 78-128 <br /> Surrogate a a a-Tr fluorotoluene 9 73 100 973 55-142 <br /> Matrix Spike Dup(3A31002-MSD1) Source MMA0549-04 Prepared 01/31/03 Analyzed 02101/0.3_ _ <br /> Gasoline Range Organics(C6-C10) 450 50 ug/I 550 ND 81 8 62-134 - 1 32 41 <br /> Benzene 877 050 6 80 ND 129 68-140 0 228 30 <br /> Toluene 325 050 410 ND 79 0 76-127 0 308 30 <br /> 0 thylbenzene 857 050 9 80 ND 87 4 77-130 0 234 21 <br /> ylenes(total) 405 050 47 9 ND 84 6 78-128 0 247 21 <br /> Surrogate a a a-Trifluorotoluene 102 100 102 55-142 <br /> Batch 3A31004-EPA 5030B IP/Tl <br /> Blank(3A31004-BLKI) Prepared&Analyzed 01/31/03 <br /> Gasoline Range Organics(C6-C10) ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 5 <br /> Surrogate a a a-Tr fluorotoluene 100 100 100 55-142 <br /> Laboratory Control Sample(3A31004-BSI) Prepared&Analyzed 01/31/03 <br /> Benzene 890 050 ug/1 10 0 89 0 68-140 <br /> Toluene 896 0 50 100 89 6 76-127 <br /> Ethylbenzene 924 050 10 0 924 77-130 <br /> Xylenes(total) 280 050 300 933 78-128 <br /> Sequoia Analytical-Morgan Hill The results to 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 /> 15 of 22 <br />