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819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> Sequoia (916)921-9600 <br /> FAX(9 16)921-0100 <br /> Analytical www sequoialabs com <br /> SECOR International-Rancho Cordova Protect ARCO 595, Stockton,CA Sampled 6/1/00 to 616100 <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Received 6/8/00 <br /> Rancho Cordova,CA 95670 Project Manager Rusy Benkosky Reported 6119/00 <br /> Volatile Oxygenate Compounds by EPA Method 8260A/Quality Control <br /> Sequoia Analytical- Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> IAnalytc Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 0060134 Date Prepared 6/15100 Extraction Method EPA 5030B McOH <br /> Blank 0060134-BLK1 <br /> Tert-butyl alcohol 6/15/00 ND mg/kg 100 <br /> Methyl tert-butyl ether ND 0 100 <br /> Dt-isopropyl ether ND 0 100 <br /> Ethyl tert-butyl ether ND 0 100 <br /> Tert-amyl methyl ether ND 0 100 <br /> Ethanol ND 150 <br /> 1,2-Dichloroethane ND 0100 <br /> Ethylene dibromide ND 0 100 <br /> Surrogate 1 2-DCA-d4 250 262 600-140 105 <br /> LCS 0060134-BS 1 <br /> Methyl tert-butyl ether 6/15/00 250 217 mg/kg 700-130 868 <br /> ate 1,2-DCA-d4 250 254 600-140 102 <br /> Matrix Saike 0060134-MSI S006120-12 <br /> Methyl tert-butyl ether 6/15/00 250 ND 1 92 mg/kg 600-140 768 _ <br /> Surrogate 1,2-DCA-d4 11250 221 600-140 884 <br /> Matrix Spike Duo 0060134-MSD1 5006120-12 <br /> _Methyl tert-butyl ether 6/15/00 250 ND 198 mg/kg 600-140 792 250 308 <br /> Surrogate 1,2-DCA-d4 250 222 600-140 88 8 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 26 of 27 <br />