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Striker Avenue Suite 8 <br /> Sequoia 819Sacramento CA 95834 <br /> i <br /> K (916) 921-9000 <br /> i„-)- Analytical FAX(916) 921-0100 <br /> SECOR International-Sacramento Project ARCO 595, Stockton,CA Sampled 9/10/99 to 9114199 <br /> 9912 Business Park Dr,Ste 100 ProjectNumber NIA Received 9/15/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky 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 RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9090204 Date Prepared 9120/99 Extraction Method EPA 5030B McOH <br /> Blank 9090204-BLK 1 <br /> Tert-butyl alcohol 9/21/99 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 /> Ethanol ND 150 <br /> 1,2-Dichloroethane ND 0100 <br /> Ethylene dibromide ND 0 100 <br /> Surrogate 1 2-DCA-d4 250 2 65 600-140 106 <br /> LCS 9090204-BS1 <br /> Methyl tent-butyl ether _ 9/21/99 250 236 mg/kg 700-130 944 <br /> grate 1 2-DCA-d4 11250 2 74 600-140 110 <br /> LCS Dup 9090204-BSD1 <br /> Methyl tent-butyl ether 9/21199 250 231 mg/kg 700-130 92 4 25 0 2 14 <br /> Surrogate 1 2-DCA-d4 112 50 2 65 600-140 106 <br /> Matrix S ike 9090204-MSI 5909240-01 <br /> Methyl tert-butyl ether 9/21/99 2 50 647 9 24 mg/kg 600-140 111 <br /> Surrogate 12-DCA-d4 11250 226 600-140 904 <br /> Matrix Spike Dup 9090204-MSDI 5909240-01 <br /> _Methyl tert-butyl ether 9/21/99 2 50 647 844 mg/kg 600-140 788 250 339_ _-3 <br /> Surrogate 1 2-DCA-d4 2 50 226 'r 600-140 904 <br /> Batch 9090248 Date Prepared 9123199 Extraction Method EPA 5030E IMeOHI <br /> Blank 9090248-BLK 1 <br /> Tert-butyl alcohol 9/23199 ND mg/kg 10 0 <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 /> Ethanol ND 150 <br /> 1,2-Dichloroethane ND 0100 <br /> Ethylene dibromide ND 0 100 <br /> Surrogate 12-DCA-d4 250 2 62 600-140 105 <br /> LCS 9090248-BSI <br /> Klwilwl tert-butyl ether 9/23/99 250 2 50 mg/kg 700-130 100 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 17 of 19 <br />