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ID Sequoia 819Sacr�;nto CA 95834 <br /> (915)921-9600 <br /> FAX(916)92 i <br /> Analytical www sequoialabs com com <br /> 0 <br /> SECOR International-Rancho Cordova Project Former 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 38 <br /> Volatile Oxygenate Compounds by EPA Method 8260A - Quality Control <br /> Sequoia AnaIytical - Sacramento <br /> Reporting Spoke Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1060013-EPA 5030B JMeOHJ <br /> Matrix Spike(1060013-MSI) Source 5105448-01 Prepared&Analyzed 06/04/01 <br /> Methyl tert-butyl ether 206 010 mg/kg 250 ND 824 60-140 <br /> Surrogate 12-DCA-d4 234 2.50 936 60-140 <br /> Matrix Spike Dup(1060013-MSD1) Source 5105448-01 Prepared&Analyzed 06/04/01 <br /> Methyl tert-butyl ether 203 010 mg/kg 250 ND 81 2 60-140 1 47 �25 A <br /> Surrogate 12-DCA-d4 227 250 908 60-140 <br /> i <br /> 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 10 of 15 <br />