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t Ih <br /> B19 Striker Avenue,Suite 8 <br /> fit A Sequoia Sacramento,CA 95834 <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs cam in <br /> SECOR International-Rancho Cordova Project ARCO 595,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number 595,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Pmject Manager• Rusty Benkosky 04/19/02 14 47 <br /> Volatile Organic Compounds by EPA Method 8260B -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 2040161-EPA 5030B[P/TJ _ _ <br /> Blank(2040161-BLK1) -„ Prepared&Analyzed 04/15/02 <br /> Tert-butyl alcohol ND 5 0 ug/I <br /> Methyl tert-butyl ether ND 0 50 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Tert-amyl methyl ether ND 050 " <br /> Ethanol ND 50 " <br /> 1,2-Dichloroethane ND 050 " <br /> Ethylene dibnomide ND 050 " <br /> Surrogate 1 2-DCA-d4 288 250 115 60-140 <br /> LCS(2040161-BS1) - Prepared&Analyzed 04/15/02 <br /> Methyl tent-butyl ether 274 0 50 u9/1 25 0 110 60-140 <br /> Surrogate 1,2-DCA-d4 298 11 250 119 60-140 <br /> Matrix S12ike 2040161-M81 Source S204191-08 Prepared&Anal zed 04/15/02 <br /> Methyl tert-butyl ether 22 8 050 ug/l 250 ND 91 2 00-140 <br /> Surrogate 1 2-DCA-d4 277 250 111 60-140 <br /> Matra Spike Dup 2040161-MSD1 _ —_ --Source S204191-08- -Prepa=d&Analyzed 04/15102- — - - <br /> Methyl tert-butyl ether 21 7 050 ug/l 25 0 ND 868 60-140 494 25 <br /> Surrogate 1 2-DCA-d4 - _ �� 266 -250-- _ X106 60-140 - <br /> Batch 2040169-EPA 5030B PIT <br /> Blank 2040169-BLK1Pre ared&Analyzed 04/17/02 <br /> Tert-butyl alcohol ND 5 0 119/1 <br /> Methyl tert-butyl ether Nn o Sn " <br /> DI-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Tert-amyl methyl ether ND 050 " <br /> Ethanol ND 50 " <br /> 1,2-Dichloroethane ND 050 " <br /> - Ethylene dibromide - ND 0 50 - - - - - - - - - <br /> Surrogate 1,2-DCA-d4 261 250 104 60-140 <br /> Sequoia.Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical report must be reproduced in its entirety <br /> Page Page I 1 of 13 <br />