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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921 9600 <br /> FAX(916)921-0 100 <br /> Analytical www sequoialabs corn <br /> SECOR International-Rancho Cordova Project Fortner Chevron 9-8632,Tracy,CA <br /> 3017 Kilgore Road,Suite 100 Project Number 077 43506 150 Reported <br /> Rancho Cordova CA,95670 Project Manager Bill Brasher 06/15/01 13 22 <br /> Volatile Oxygenate Compounds by EPA Method 8260A - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC IP1) <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1050344-EPA 5030B (P/"1'l <br /> Blank(1050344-BLKI) _ Prepared&Analyzed 05/30/01 <br /> Tert-butyl alcohol ND 200 ug/I <br /> Methyl ten-butyl ether ND 20 <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> Tett-amyl methyl ether ND 20 " <br /> Ethanol ND 3000 " <br /> 1,2-Dichloroethane ND 20 <br /> Ethylene dibromide ND 20 " <br /> Surrogate 1 2-DCA-d4 492 500 984 60-140 <br /> LCS(1050344-BS1) Prepared&Analyzed 05/30/01 <br /> yl tert-butyl ether 48 l 20 ugtl SU 0 962 60-140 � <br /> I <br /> agate 12-DCA-d4 516 11 500 103 60-140 <br /> I <br /> Matrix Spike(1050344-MSI) Source S105308-04 Prepared&Analyzed 05/30/01 <br /> Methyl tert-butyl ether 47 1 20 ug/l 500 ND 942 60-140 <br /> Surrogate 1,2-DCA-d4 503 500 101 60-140 <br /> i <br /> Matrix Spike Dap(1050344-MSD1) Source 5105308-04 Prepared&Analyzed 05/30/01 <br /> Methyl tert-butyl ether 505 20 ug/I 500 ND 101 60-140 697 25 <br /> Surrogate I2-DCA-d4 S19 500 104 60-140 <br /> Batch 1060013-EPA 5030E {MeOHJ <br /> Blank(1060013-BLKI) Prepared&Analyzed 06/04/01 <br /> Tert-butyl alcohol ND 10 mg/kg <br /> Methyl tert-butyl ether ND 0 10 " <br /> Di-isopropyl ether ND 0 10 " <br /> Ethyl tert-butyl ether ND 0 10 " <br /> Tert-amyl methyl ether ND 0 10 " <br /> Ethanol ND 150 " <br /> 1,2-Dichloroethane ND 010 " <br /> Ethylene dibromide ND 0 10 " <br /> Surrogate 12-DCA-d4 234 250 936 60-140 <br /> oia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance ivith the chain of <br /> custody document This analyiical report musl be reproduced in tis entirety <br /> Page 12 of 20 <br />