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>> <br /> Sequoia <br /> ��y�O�� $f 9 Striker Avenue, Suite 8 <br /> 6.L Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAx (916)9z1-0100 <br /> EMCON/Pinnacle-Sacramento Project: ARCO 2186,Stockton,CA Sampled: 9/10/99 <br /> 1433 N. Market Blvd. Project Number: 792232 Received: 9/13/99 <br /> Sacramento,CA 95834 Project Manager: Dave Foley Reported: 9/27/99 <br /> Volatile Oxygenate Compounds by EPA Method 8260A[Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov. RPD !T/. <br /> Analyte Analyzed Level Result Result Units Recov. Limits % Limit Notes* <br /> Batch: 9090110 Date Prepared: 9/13199 Extraction Method: EPA 5030E (P/Tl <br /> Blank 9090110-BLK1 <br /> Tert-butyl alcohol 9/13/99 ND ug/! 200 <br /> Methyl tert-butyl ether ND 2.00 <br /> „ ND 2.00 <br /> Di-isopropyl ether <br /> Ethyl tert-butyl ether ND 2.00 <br /> 2.00 <br /> Tert-amyl methyl ether ND <br /> Ethanol " N .3000 <br /> D " - - <br /> Surrogate: 1,2-DCA-d4 50.0 58.0 60.0-140 116 <br /> Blank 9090110-BLK2 <br /> Tert-butyl alcohol 9/13/99 ND ug/! 200 <br /> Methyl tert-butyl ether ND 2.00 <br /> Di-isopropyl ether ND 2.00 <br /> ith 1 tert-butyl ether ND 2.00 <br /> i <br /> myl methyl ether ND 2.00 <br /> of ND 3000 <br /> Surrogate: 1,2-DCA-d4 50.0 5R2 60.0-140 118 <br /> Blank 9090110-BLK3 <br /> Tert-butyl alcohol 9115199 ND ug/l 00 <br /> Methyl tert-butyl ether ND 2..00 <br /> Di-isopropyl ether ND 2.00 <br /> Ethyl tert-butyl ether ND 2.00 <br /> Tert-amyl methyl ether ND 2.00 <br /> Ethanol ND 3000 <br /> Surrogate: 1,2-DCA-d4 11 <br /> 50.0 59.6 60.0-140 119 <br /> LCS 9L90110-BSI <br /> Methyl tert-butyl ether 9/13/99 50.0 48.4 ug/! 70.0-130 96.8 -- <br /> Surrogate: 1,2-DCA-d4 10 <br /> 50.0 58.2 " 60.0-140 116 <br /> LCS 9090110-BSDI <br /> Methyl tert-butyl ether 9/13/99 50.0 49.4 ugl! 70.0-130 98.& 25.0 2.04 <br /> Surrogate: 1,2-DCA-d4 50.0 57.8 60.0-140 116 <br /> Matrix Spike 9090110-MSI 5909120-26 <br /> _Methyl tert-butyl ether 9/13199 50.0 ND 49.0 ug/l 60.0-140 98.0 <br /> Surrogate: 1,2-DCA-d4 50.0 55.2 60.0140 110 <br /> Matrix Spike Du - 9090110-MSDI 5909120-26 <br /> Methyl tert-butyl ether 9113/99 50.0 ND 52.2 ug/l 60.0-140 104 25.0 _ 5.94 <br /> Aft <br /> oia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> Page 7 of 9 <br />