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„1 Iv <br /> 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> Sequoia (916)921-9600 <br /> FAX(916)921-0100 <br /> 9—!D— <br /> FAX www sequotalabs mm <br /> SECOR International-Rancho Cordova Project TOSCO 11193,Stockton,CA <br /> Project Number N/A Reported <br /> 3017 Kilgore Road,Suite 100 Pro� <br /> Rancho Cordova CA,95670 Project age” Rusty Benkosky 12/12/01 12 35 <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 1120033-EPA 5030B(PIT) <br /> Blank 1120033-BLK1Prepared&Analyzed 11/30/01 <br /> Purgeable Hydrocarbons ND 2 8 ppmv <br /> Benzene ND 0 016 " <br /> Toluene ND 0 013 " <br /> EthyIbenzene ND 0 012 " <br /> Xylenes(total) ND 0 012 " <br /> Methyl tert-butyl ether ND 014 " <br /> Surrogate a a a-Trifluorotoluene 000186 000200 93 0 60-140 <br /> LCS 1120033-BS1Prepared&Anal ed 11/30/01 <br /> Surrogate a a a-Trifluorotoluene 000194 ppmv 000200 970 60-140 <br /> LCS Du 1120033-BSD1 Prepared&Analyzed 11/30/01 <br /> Surrogate a a a-Trifluorotoluene 000204 ppmv 000200 102 60-140 <br /> Batch 1120065-EPA 5030B(PIT) _ <br /> Blank(1120065-BLKI) 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 tert-butyl ether ND 014 " <br /> Surrogate a,a,a-Trtfluorotoluene 000186 000200 930 60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed to accordance with the chat <br /> of custody document This analytical report must be reproduced in its entirev <br /> Page Page 7 of 9 <br />