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4D- <br /> 819 Striker Avenue,Suite 8 <br /> 5e[jilola Sacramento,CA 9583a <br /> Analytical (916)921 9600 <br /> 0 FAX 416 921-0100 <br /> www sequaralabs corn <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,95670 Project Manager Rusty Benkosky 01/02/02 16 41 <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 /> rn <br /> Analyte Result Lllt Units Level Result %REC Limits RPD Limit Nates <br /> Batch 1120087-EPA 5030B(PIT) <br /> Blank 1120087-BLK1Prepared&Analyzed 12/04/01 <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 000196 000200 98 0 60-140 <br /> LCS 1120087-BS1 Prepared&Analyzed 12/04/01 <br /> Surrogate a a,a-Trifluorotoluene 000195 ppmv 000200 975 60-140 <br /> LCS Du 1120087-BSDI Prepared&Analyzed 12/04/01 <br /> Surrogate a a a-Trifluorotoluene 000200 ppmv 000200 100 60-140 <br /> quoia 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 he reproduced in its entirety <br /> Page Page 7 of 10 <br />