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Sequoia 819 Striker Avenue Swt't3 <br /> Sacramento CA 95834 <br /> icoAnal t1Cal - - - - - — (916)921-9604 <br /> y FAX(916)921-0100 <br /> 0 <br /> SECOR International Project ARCO 434, Lodi,CA Sampled 7/8/99 <br /> 9912 Business Park Drive,Ste 100 Project Number N/A Received 7/8/99 <br /> Sacramento,CA 95827 ---- Project Manager_ Rusty_Benkosky_.. __ _ -Reported..7/16/99.. - <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 /> Analyte Analyzed Level Result Result Units Recov Limits % Limit V. Notes* <br /> Batch. 9070151 Extraction Method. EPA_ <br /> �O3Q.BJM..eM <br /> Blan 9070159070151-BLKI-BLKI <br /> Tert-butyl alcohol 7/13/99 ND mg/kg 100 <br /> Methyl tert-butyl ether ND 0 100 <br /> Di-isopropyl ether ND " 0 100 <br /> Ethyl tert-butyl ether ND 0 100 <br /> Tert-amyl methyl ether ND 0 100 <br /> 1,2-Dichloroethane ND 0100 <br /> Surrogate 1 2-DCA d4 250 2 74 600-140 110 <br /> LC.S 907Q151-BSI <br /> Methyl tent-butyl ether 7/13/99 2 50 266 mg/kg 700-130 106 <br /> Surrogate 1 2-DCA-d4 11 250 2 78 600-140 111 <br /> Matrix Spike 9070151_MS 5907042-13 <br /> Methyl tert-butyl ether 7/13/99 2 50 ND 2 39 mg/kg 600-140 956 <br /> Surrogate 1 2-DCA-d4 11 250 2 50 600-140 100 <br /> Matrix Spike DuR - 52070.42-13 <br /> Methyl tert-butyl ether 7/13/99 250 ND 233 mg/kg 600-140 93 2 25 0 254 <br /> Surrogate 1 2-DCA-d4 250 2 48 600-140 992 <br /> Sequoia Analytical- Sacramento *Refer to end of report for text ofnotes and definition <br /> Page 5 of 6 <br />