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• 7 <br /> 819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> 1 (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> q0I www sequoialabs corn <br /> SECOR International-Rancho Cordova Project ARCO 595,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number 595,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 04/19/02 14 47 <br /> Total Purgeable Hydrocarbon,BTEX and MTBE by DHS LUFT-Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2040219-EPA 5030B(PIT) <br /> Matrix Spike Dup(2040219-MSD_1) Source S204221-12 Prepared 04/16/02 Analyzed 04/17/02 <br /> Benzene 107 0 50 119/1 100 ND 107 60-140 0 939 25 <br /> Toluene 10 9 0 50 too ND 109 60-140 0 922 25 <br /> Ethylbenzene I 1 2 0 50 100 ND 112 60-140 0 897 25 <br /> Xylenes(total) 327 050 " 300 ND 109 60-140 0 610 25 <br /> Methyl tert-butyl ether 442 25 to 0 ND 442 60-140 947 25 A-01a <br /> Surrogate a a a-Trguorotoluene 114 100 124 60-140 <br /> f <br /> uota Analytical-Sacramento 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 /> Page Page 10 of 13 <br />