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Sequoia 819 Striker Avenue,Suite <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921-0100 a <br /> www.sequoialabs.com I <br /> 4 <br /> I <br /> IT Corporation-Sacramento Project: Parkinson's ARCO,Stockton <br /> 1433 N.Market Blvd., Ste, 1 Project Number: 880-040.IA/01050000 ` <br /> Sacramento CA,95834 Reported: I <br /> Project Manager: Kathleen Waldo 02/03/01 11:29 <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 °/oREC Limits RPD Limit Notes <br /> I <br /> Batch 1010217-EPA 5030B [P/TJ <br /> LCS(1010217-BS1) Prepared&Analyzed:01/23/01 <br /> Methyl tea-butyl ether 46.6 2.00 ug/1 50.0 93.2 60-140 <br /> Surrogate:l,2-DCA-d4 48.4 50.0 96.8 60-140 <br /> LCS Dup(1010217-ESDI) Prepared&Analyzed:01/23/01 <br /> Methyl tert-butyl ether 47.4 2.00 ug/I 50.0 94.8 60-140 1.70 25 <br /> Surrogate:1,2-DCA-d4 48.2 50.0 96.4 60-140 <br /> Matrix Spike(1010217-MSI) Source:S101320-03 Prepared&Analyzed:01/23/01 <br /> Methyl tert-butyl ether 48.8 2.00 ug/l 50.0 ND 97.6 60-140 <br /> Surrogate:l,2-DCA-d4 47.0 11 50.0 94.0 60-140 <br /> Matrix Spike Dup(1010217-MSD1) Source:5101320-03 Prepared&Analyzed:01/23/01 <br /> `thyl tent-Butyl ether 51.8 2.00 ugll 50.0 ND 104 60-140 5.96 25 <br /> urrogate:1,2-DCA d4 46.9 50.0 93.8 60-140 <br /> SII <br /> } <br /> E Y <br /> I i <br /> 5 <br /> i <br /> f <br /> If hloia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Wage 8 of 9 <br /> E � <br />