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' 819 Striker Avenue suite 8 <br /> equo a Sacramento, 95834 <br /> -9600 <br /> (916)92 921-9600 <br /> FAX(916)921-0100 <br /> Analytical www sequoialabs corn <br /> SECOR International-Rancho Cordova Project ARCO 595, Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/31/01 17 12 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1G27004-EPA 5030B PIT <br /> Blank(1G27004-BLK1) Prepared&Analyzed 07/27/01 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> tcnzene ND 050 <br /> oluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> ylenes(total) ND 050 " <br /> ethyl tert-butyl ether ND 25 " <br /> Surrogate a a a-Trifluorololuene 278 300 927 70-130 <br /> tCS(1G27004-BSI) Prepared&Analyzed 07/27/01 <br /> nzene 228 050 UO 200 114 70-130 <br /> Toluene 182 050 200 910 70-130 <br /> WAknzene 174 050 200 870 70-130 <br /> DWS(total) 568 050 600 947 70-130 <br /> Surrogate a a a-Triuorotoluene 283 300 943 70-130 <br /> 1 <br /> *Tia—A—nalytical-Sacramento The results to this report apply to the samples analyzed in accordance with the chain of <br /> tcustody document This analytical report must he reproduced in its entirety <br />' Page 7 of 8 <br />