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Sequoia 819 Striker Avenue Suite 8 <br /> Sacramento CA X35834 <br /> - (916) 921-9600 <br /> i&W Analytical FAX(916) 921-0100 <br /> SECOR International Project ARCO 434,Lodi,CA Sampled 6/16/99 <br /> 9912 Business Park Drive,Ste 100 Project Number N/A Received 6/18199 <br /> Sacramento,CA 95827 __- - -- = Project Manager -Rusty Benkosky==-- - - _- - ---Reported - 7/6/99--- <br /> Volatile <br /> 16199- -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 % Nates* <br /> Batch.9060373 Date Prepared, 6124199 Extraction Method, EPA 503013 1MeOH1 <br /> Blank 9060373-BLKi <br /> Tert-butyl alcohol 6/25199 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 250 245 600-140 980 <br /> LCS 4460373-55 1 <br /> Mcthyl tert-butyl ether 6/25199 250 248 mg/kg 700-130 992 <br /> Surrogate 1 1-DCA-d4 11250 243 600-140 972 <br /> Matrix Spike 2000373-MSI 5906238-02 i <br /> Methyl tert-butyl ether 6125/99 250 145 3 78 mg/kg 600-140 932 <br /> Surrogate 12-DCA-d4 " 250 225 600-140 900 <br /> Matrix;;Snike DunDun 9060373-MSDI 5906238-02 <br /> Methyl tert-butyl ether 6/25199 250 145 3 88 mg/kg 600-140 972 250 420 <br /> Surrogate 1 2-DCA-d4 250 222 600-140 888 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 7of8 <br />