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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento,C9 95834 <br /> Analytical FAX(915)421-9600 <br /> (915)92 1 0100 <br /> www sequoialabs com <br /> SECOR International-Rancho Cordova Project TOSCO 11193,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project mag- Rusty Benkosky I2/11/01 16 42 <br /> Total Purgeable Hydrocarbons,BTEX and MTBE in Air(ppmv) by DHS LUFT-Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> lAnalyte Result Limit Units level Result %REC Limits RPD Limit Notes <br /> Batch 1120065-EPA 5030B(P!1) <br /> Blank(1120065-BLK1) Prepared&Analyzed 11/30/01 <br /> Purgeable Hydrocarbons ND 2 8 ppmv <br /> Benzene ND 0 016 " <br /> Toluene ND 0 013 <br /> Ethylbenzene ND 0 012 " <br /> Xylenes(total) 'ND 0 012 <br /> Methyl text-butyl ether ND 0 14 " <br /> Surrogate a a a-Trifluorotoluene 000186 000200 93 0 60-140 <br /> 0 <br /> Sequoia Analytical-Sacramento The results to this report apply to the samples analyzed in accordance with thechai <br /> of custody document This analytical report must be reproduced in its ent:ret <br /> Page Page 7 of 10 <br />