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• <br /> Sequoia 819 Straker Avenue Suite 8 ' <br /> 12) Sacramento CA95834 <br /> (916)921-9600 <br /> icp Analytical FAX(916)92[-Olt/(} <br /> 0 <br /> SECOR International Project ARCO 434, Lodi,CA Sampled 6/18/99 <br /> 9912 Business Park Drive, Ste 100 Project Number N/A Received 6118/99 <br /> Sacramento,CA 95827-- - - --Project Manager= Rusty Benkosky = -- - -_- - Reported 716199 <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 % Notes* <br /> Batch. 9060419 Date Prepared. 6129199 Extraction Method, EPA 5030B[Me011l <br /> Blank 9060419-BLK 1 <br /> Tert-butyl alcohol - 6/30/99 ND mg/kg 100 <br /> Methyl tert-butyl ether NO 0 100 <br /> Di-isopropyl ether NO 0 100 <br /> Ethyl ter(-butyl ether ND 0 100 <br /> Tert-amyl methyl ether NO 0 100 <br /> 1,2-Dichloroethane NO 0 100 <br /> Surrogate 1 2-DCA-d4 250 278 600-140 111 <br /> 1S 9060419-BS] <br /> Methyl tert-butyl ether 6/30/99 2 50 265 mg/kg 700-130 106 <br /> Surrogate 1 2-DCA-d4 " 250 295 600-140 118 <br /> Atrix Spike 9060419-1%4SI S906400-04 <br /> Methyl tert-butyl ether 6/30/99 250 ND 234 mg/kg 600-140 936 <br /> Surrogate 12-DCA-d4 11 250 257 600-140 103 <br /> Matrix Spike Duo 9060419-MSDI 5906400-04 <br /> Methyl cert-butyl ether 6/30/99 250 ND 243 mg/kg 600-140 972 250 377 <br /> Surrogate 1 2-DCA-d4 11 250 264 1. 600-140 106 <br /> Batch. 9070009 Date Prepared. 7/1/99 ExtractiQn Method, EPA 5030B IMeQ111 <br /> Blank 9070009-131,K], <br /> Teri-butyl alcohol 7/2/99 - ND mg/kg 100 <br /> Methyl tent-butyl ether NO 0 100 <br /> Di-isopropyl ether NO 0 100 <br /> Ethyl tert-butyl ether NO 0 100 <br /> Tert-amyl methyl ether NO 0 100 <br /> 1,2-Dichloroethane NO 0100 <br /> Surrogate 1 2 DCA-d4 2 50 <br /> 266 600-140 106 <br /> LCS 9070009-BS] <br /> Methyl tett-butyl ether 712199 2 50 2 44 mg/kg 70 0-l 30 9b 0 <br /> Surrogate 1 2-DCA-d4 2 50 2 87 60 0-140 115 <br /> 2070009-MSI S906417-01 <br /> Methyl cert-butyl ether 711199 2 50 ND 2 32 mg/kg 60 0-140 92 8 <br /> Surrogate 1 2-DCA-d4 2 50 2 66 60 0-140 I06 <br /> Sequoia Analytical-Sacramento *Refer to end ofreport for text ofnotes and defnittons <br /> Page 12 of 14 <br />