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819 Stnker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> *..� (916)921-96009600 <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs com <br /> *---nternational-Rancho Cordova Project ARCO 595, Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number 595,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/30/02 14 12 <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 Limas RPD Limit Notes <br /> Batch 2070232-EPA 5030B [PIT] <br /> LCS(2070232-BSI) Prepared&Analyzed 07/24/02 <br /> Methyl tert-butyl ether 208 050 ugA 21 8 95 60-140 <br /> Surrogate 12-DCA-d4 244 ,. 250 98 60-140 <br /> Matrix Spike(2070232-MSI) Source S207267-01 Prepared&Analyzed 07/24/02 <br /> Methyl tert-butyl ether 204 050 ug/l 21 8 ND 94 60-140 <br /> Surrogate 1 2-DCA-d4 220 " 250 88 60-140 <br /> Matrix Spike Dup(2070232-MSDI) Source 5207267-01 Prepared&Analyzed 07/24/02 <br /> Methyl tert-butyl ether 226 050 ug/1 21 8 ND 104 60-140 10 25 <br /> Surrogate 1 2-DCA-d4 241 250 96 60-140 <br /> 0 <br /> Sequoia <br /> quoia Analytical-Sacramento The results to 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 Page 15 of 16 <br />