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4D (40885 Drive <br /> Sequoia Morgan Hill,1,CA CA 45503737 <br /> qW Analytical <br /> 8)776-9600 <br /> FAX(408)782-6308 <br /> www segaoialabs con <br /> Secor-Rancho Cordova Project ARCO#2133,Rancho Cordova,CA <br /> 3017 Kilgore Rd Suite 100 Project Number ARCO#2133,Racho Cordova,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 10/21/02 17 13 <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 Limit Notes <br /> Batch 2JO7002-EPA 50308 [P/TI <br /> Blank M07002-13LKIIPrepared&Analyzed 10/07/02 <br /> Gasoline Range Organics(C6-C10) ND 50 u9/1 <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate a s a-Trifluorotoluene 940 100 94 0 70-130 <br /> LCS 2J07002-BS1Prepared&Analyzed 10/07/02 <br /> Benzene 977 0 50 ug/1 10 0 977 70-130 <br /> Toluene 997 0 50 10 0 997 70-130 <br /> Ethylbenzene 9 58 050 10 0 95 8 70-130 <br /> Xylenes(total) 294 050 30 0 98 0 70-130 <br /> Wurrogate a a a-Trr fluorotoluene 981 100 98 1 70-130 <br /> LCS 2J07002-BS2 Prepared&Analyzed 10/07/02 <br /> Gasoline Range Organics(C6-C10) 224 50 ugfl 250 89 6 70-130 <br /> Surrogate a a a-Trifluorotoluene 860 100 860 70-130 <br /> Matrix Spike(2J07002-MSI) Source MLIG648-01 Prepared&Analyzed 10/07/02 <br /> Gasoline Range Organics(C6-C10) 418 50 u9/1 550 94 58 9 60-140 QM-07 <br /> Benzene 10 2 050 " 6 60 ND 155 60-140 QM-07 <br /> Toluene 379 050 " 397 ND 95 3 60-140 <br /> Ethylbenzene 905 050 9 20 ND 984 60-140 <br /> Xylenes(total) 428 0 50 461 ND 92 5 60-140 <br /> Surrogate a a a-Trcfluorotoluene 9 74 10 0 974 70-130 <br /> Matrix Spike Dup(2J07002-MSD1) Source MLI0648-01 Prepared&Analyzed 10/07/02 _ <br /> Gasoline Range Organics(C6-C10) 483 50 ugll 550 94 707 60-140 14 4 25 <br /> Benzene 990 050 6 60 ND 150 60-140 299 25 QM-07 <br /> Toluene 363 0 50 397 ND 91 2 60-140 4 31 25 <br /> Ethylbenzene 871 0 50 920 ND 94 7 60-140 3 83 25 <br /> Xylenes(total) 41 8 0 50 461 ND 903 60-140 2 36 25 <br /> Surrogate a,a a-Trifluorotoluene 830 100 83 0 70-130 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical report must be reproduced in its entirety <br /> 10 of 15 <br />