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i <br /> i <br /> i <br /> 819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> IINFAX(916)921.0100 <br /> off www sequoialabs corn <br /> SECOR International-Rancho Cordova Project ARCO 2093,Tracy CA <br /> 3017 Kilgore Road,Suite 100 Project Number NIA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Senkosky 03/30/01 10 36 <br /> Total Purgeable Hydrocarbons (C6-C12), 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 1030244- EPA 5030B(PIT) <br /> Blank(1030244-BLK1) _ Prepared&Analyzed 03/16/01 <br /> Purgeable Hydrocarbons ND 280 ppmv <br /> Benzene ND 00160 " <br /> Toluene ND 00130 " <br /> Ethylbenzene ND 00120 <br /> Xylenes(total) ND 00120 <br /> Methyl tert-butyl ether ND 0 140 " <br /> Surrogate a a a-Triuorotoluene 000232 000200 116 60-140 <br /> 0 <br /> AftL <br /> oia Analytical -Sacramento The results in this 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 6 of 8 <br />