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Sequoia ( 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> Analytical (916)921-9600 <br /> FAX (916)921-0 t 00 <br /> ti - <br /> EMCON-CP Project: ARCO 2186,Stockton,CA Sampled: 6/]7199 <br /> 3939 Cambridge Ave Project Number: 21775-237-002 Received: 6118199 <br /> Cameron 1'ark,CA 95682 -Project Manager: Mark Caps Reported: 7/1199 <br /> Volatile Oxygenate_Compounds by EPA Method 8260A/Quality <br /> SequoYa->An'alytical SacramentoR a <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov.Limits % Limit % Notcs* <br /> ,�h: 9060109 1_)atcPrepared! 99 <br /> Blank, 9060309-BLK1 <br /> Tert-butyl :,Icohol 6/21/99 <br /> Methyl tert-butyl ether ND mg/kg 10.0 <br /> ND 0.100 <br /> Di-isopropyl ether ND 0.I00 <br /> Ethyl tert-butyl ether ND 0.3110 <br /> Tert-amyl methyl ether ND 0.100 <br /> Ethanol ND I50 <br /> Surrogate. 1,2-DCA44 2.50 1.33 " 60.0-140 93.1 <br /> U 9060-'}"_-BS3 <br /> Methyl tert-butyl ether 6/21/99 2.50 2.49 mg/kg 70.0-130 99.6 <br /> Surrogate: 1,2-DCA44 It 2.50 2.36 6.0.0-140 94.4 <br /> Matrix <br /> �3� IS6�01Met1 tiY1 ether 6/23/99 2.50 <br /> 11.0 11.9 mg/kg 60.0-140 36.0 4 <br /> Surrogate: 1,2-DCA-d4 1.50 1.95 60.0-140 78.0 <br /> Matrix Spike Dun 9060309-MSl)l <br /> 5906319-n3 <br /> Methyl tert-butyl ether 6/23/99 2.50 11.0 12.2 m /k <br /> Surrogate: 1,2-DCA-d4 g g 60.0-140 45.0 25.0 28.6 q <br /> . 2.50 2.06 60.0-140 81.4 <br /> Sequoia Analytical-Sacramento *Refer to end ofreport for text ofnotes and definitions. <br /> i <br /> Da <br /> j <br /> Page 13 of 14 <br /> I <br />