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nt] � <br /> 819 Stnker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> 4D (916)921-9600 <br /> Analytical FAX(916)921-0100 <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 Manager gusty Benkosky 12/I7/01 14 16 <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 /> [An"alylte Result Limit Units Level Result %REC Lints RPD Lunt Notes <br /> Batch 1120087-EPA 5030B /T <br /> Blank(1120087-BLKI) Prepared&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 tert-butyl ether ND 0 14 " <br /> Surrogate a a a-Try7uorotoluene 000196 000200 98 0 60-140 <br /> LCS(1120087-BSI) Prepared&Analyzed 12/04/01 <br /> Surrogate a a a-Tris luorololuene 000195 ppmv 000200 975 60-140 <br /> LCS Dup(1120087-BSDI) Prepared&Analyzed 12/04/01 <br /> Surrogate a a a-Trifluorotoluene 000200 ppmv 000200 100 60-140 <br /> 0 <br /> quota Analytical-Sacramento The results in thu report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page Page 7 of 10 <br /> i <br />