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819 Stnker Avenue Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (9l6)921-9600 <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs com <br /> E <br /> International-Rancho Cordova Prom Tosco 1205,Lathrop,CA <br /> lgore Road,Suite 100 PtojectNumber N/A Reported <br /> Cordova CA,95670 Pro}act Manager Rusty Benkosky 04/10/02 18 08 <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 Lumt Units Level Result OKREC Limits RPD Limit Notes <br /> Batch 2030385-EPA 5030B(P/T) <br /> Blank(20303$5-BLK1) Prepared&Analyzed 03/28/02 <br /> Purgeable Hydrocarbons ND 28 ppmv <br /> Benzene ND 0 016 " <br /> Toluene ND 0 013 " <br /> Ethylhenzene ND 0 012 " <br /> Xylenes(total) ND 0 012 " <br /> Methyl tort-butyl ether ND 014 " <br /> Surrogate a a a-Trifluorotoluene 0 356 0 335 106 60-140 <br /> LCS(2030385-BS1) Prepared&Analyzed 03/28/02 <br /> Surrogate aa a-Trifluorotoluene 0 385 ppmv 0 335 115 60-140 <br /> LCS Dup(2030385-BSD1) Prepared&Analyzed 03/28/02 <br /> Surrogate aa a-Trifluorotoluene 0 255 ppmv 0 335 761 60-140 <br /> Batch 2040016-EPA 5030B(PfD • <br /> Blank(2040016-BLK1) Prepared&Analyzed 03/29/02 <br /> Purgeable Hydrocarbons ND 28 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-Trifluorotoluene 0155 0 335 761 60-140 <br /> LCS(2040016-BS1) Prepared&Analyzed 03/29/02 <br /> Surrogate aa a-TYrr luorotoluene 0 264 ppmv 0 335 798 60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chaino <br /> custody document This analytical report must be reproduced In its entireqw <br /> Page Page 11 of 14 <br />