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Sequoia Sig Straker Avenue,Suite g <br /> Sacramento,(91 )9219600 95834 <br /> 9600 <br /> (916)921 9600 <br /> 4D Wir Analytical FAX(916)92 www sequotalabl scorn <br /> SECOR International-Rancho Cordova Project TOSCO 11192, Stockton,CA <br /> 3017 Kilgore Road, Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,956711 Protect Manager Rusty Benkosky 12/13/01 18 10 <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 /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1120107-EPA 5030B(PIT) <br /> Blank(1120107-BLK1) _ Prepared 12/06/00 Analyzed 12/06/01 <br /> Purgeable Hydrocarbons ND 2 8 ppmv <br /> Benzene ND 0 016 '1 <br /> Toluene ND 0 013 <br /> Ethylbenzene ND 0 012 " <br /> Xylenes(total) ND 0 012 " <br /> Methyl ten-butyl ether ND 0 14 " <br /> Surrogate a a a-Trifluorotoluene 000182 000200 910 60-140 <br /> LCS(1120107-BSI) 12/06/00 Analyzed 12/06/01 <br /> Surrogate a,a,a-Trifluorotoluene 000200 ppmv 000200 100 60-140 <br /> LCS Dup_(1.120107-BSD!) _ Prepared 12/06/00 Analyzed 12/06/01 <br /> Surrogate a a a-Trifluorotoluene 000200 ppmv 000200 100 60-140 <br /> • <br /> Sequoia 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 7 of 10 <br />