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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento c95834 <br /> (9191 6)922 1-9600 <br /> Analytical wFAX(916)921-0100 <br /> Apr ww sequoiatabs com <br /> SECOR International-Rancho Cordova Project Chevron 9-1452, Ripon,CA <br /> 3017 Kilgore Road, Suite 100 Project Number 077 43545 150 Reported <br /> Rancho Cordova CA,95670 Project Manager Scott Gable 08/23/01 15 33 <br /> Volatile Oxygenate Compounds by EPA Method 8260A - 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 1080001 -EPA 5030B IP/TJ <br /> Blank(1080001-BLK1) Prepared&Analyzed 08/01/01 <br /> Tert-butyl alcohol ND 200 ug/l <br /> Methyl tert-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> Tert-amyl methyl ether ND 20 " <br /> Ethanol ND 3000 <br /> 1,2-Dichloroethane ND 20 " <br /> Ethylene dibromide ND 2 0 " <br /> Surrogate 1,2-DCA-d4 531 500 106 60-140 <br /> LLJ(1080001-BSI) Prepared&Analyzed 08/01/01 <br /> tert-butyl ether 531) 2 0 ug/l 500 106 60-140 <br /> Surrogate 1 2-DCA-d4 564 500 113 60-140 <br /> Matrix Spike(1080001-MSI) _ Source 5107281-01 Prepared&Analyzed 08/01/01 <br /> Methyl tent-butyl ether 523 20 ug/l 500 ND 105 60-140 <br /> Surrogate 1,2-DCA-d4 56 7 " 500 113 60-140 <br /> Matrix Spike Dup(1080001-MSD1) Source S107281-01 Prepared&Analyzed 08/01/01 <br /> Methyl ten-butyl ether 53 7 2 0 ug/l 500 ND 107 60-140 264 25 <br /> Surrogate 1 2-DCA-d4 576 500 115 60-140 <br /> Batch 1080049-EPA 5030BJP/TJ <br /> Blank(1080049-BLK1) Prepared&Analyzed 08/06/01 <br /> Teri-butyl alcohol ND 200 ug/l <br /> Methyl cert-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> Tert-amyl methyl ether ND 20 <br /> Ethanol ND 3000 <br /> 1,2-Dichloroelhane ND 2 0 " <br /> Ethylene dibromide ND 20 " <br /> Surrogate 1 2-DCA-d4 478 500 956 60-140 <br /> AdIlk <br /> ola Analytical-Sacramento The results in this report apply 10 the samples analy_ed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Da Page 17 of 22 <br />