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- T <br /> Striker Avenue,Suite$ <br /> Sequoia 819 Sacramento,CA 95834 <br /> Analytical (916)921-9600 <br /> FAX(916)i <br /> www.scquoialabsc0 <br /> om <br /> Delta Environmental ConSUltants(Cameron Park) Project: ARCO 5469,Stockton,CA <br /> 3330 Cameron Park Dr.Ste 550 Project Number-, N/A Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 07/16/01 15:54 <br /> Volatile Oxygenate Compounds by EPA Method 8260A- Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1070026-EPA 5030B[PIT] <br /> Blank(1070026-BLKI Prepared&Analyzed:07/05/01 <br /> Tert-butyl alcohol ND 200 ug/l <br /> Methyl tert-butyl ether ND 10 „ <br /> Di-isopropyl ether ND 2.0 <br /> Ethyl tert-butyl ether ND 2.0 <br /> Tert-amyl methyl ether ND 2.0 <br /> Ethanol ND 3000 " <br /> 1,2-Dichloroethane ND 2,0 „ <br /> Ethylene dibromide ND 2.0 <br /> Surrogate: 1,2-DCA-d4 48.9 50.0 97.8 60-140 <br /> LCS(I070026-BS1 Prepared&Analyzed:07/05/01 <br /> Methyl tent-butyl ether 49.7 2.0 ug/1 50.0 99.4 60-140 <br /> Surrogate: 1,2-DCA-d4 50.4 50.0 101 60-140 <br /> Matrix Spike(1070026-NISI) Source: S106475-01 Prepared&Analyzed:07/05/01 <br /> Methyl tent-butyl ether 49.6 2.0 ug/1 50.0 2.3 94.6 60-140 <br /> Surrogate:l,2-DCA-d4 49.1 11 50.0 98.2 60-140 <br /> Matrix Spike Du (1070026-MSD1) Source: S106475-01 Prepared&Analyzed:07/05/01 <br /> Methyl tent-butyl ether 51.5 2.0 USA 50.0 2.3 98.4 60-140 3,76 25 <br /> Surrogate:1,2-DCA-d4 50.4 50.0 101 60-140 <br /> 16 Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document. This analytical report must be reproduced in its entirety. <br /> Page Page 6 of 7 <br />