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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> 4 (916)921-9600 <br /> vo- Analytical vvFAX(916)921-0100 <br /> ww.sequoialabs.com <br /> lame Tech Services,Inc. Project: Equiva,620 W.Charter Way,Stockton,CA <br /> 1680 Rogers Avenue Project Number: 010215-12 Reported: <br /> San Jose CA,95112-1105 Project Manager: Nick Sudano 03/09/01 09:32 <br /> Volatile Oxygenate Compounds by EPA Method 8260A _ Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Malyte Result Limit Units Level Result %REC Limits RPD Limit ]Votes <br /> Batch 1020305-EPA 5030B P/T <br /> Blank(1020305-BLK1) Prepared&Analyzed: 02/28/01 <br /> Tett-butyl alcohol ND 200 ug/1 <br /> Methyl tert-butyl ether ND 2.00 " <br /> Di-isopropyl ether ND 2.00 It <br /> Ethyl tert-butyl ether ND 2.00 It <br /> Tert-amyl methyl ether ND 2.00 " <br /> Ethanol ND 3000 " <br /> 1,2-Dichloroethane ND 2.00 " <br /> Surrogate: 1,2-DCA-d4 51.1 50.0 102 60-140 _— <br /> LCS(1020305-BS1) Prepared&Analyzed: 02/28/01 <br /> Methyl tert-butyl ether 51.2 2.00 ugll 50.0 t02 60-140 <br /> Surrogate:1,2-DC,4-d4 - -- -- 50.7 - - - 50.0 - 101 60-140 - - -- - - <br /> iWS Dup(1020305-B_SD1) -- Prepared&Analyzed:02/28/01 - <br /> ethyl tert-butyl ether 55.9 2.00 ugA 50.0 112 60-140 8.78 25 <br /> Surrogate: 1,2-DCA-d4 57.9 50.0 116 60-140 <br /> Matrix Spike(1020305-MSI) _ _Source: S102246-08 Prepared&Analyzed: 02/28/01 <br /> Methyl tert-butyl ether 115 2.00 ugll 50.0 230 60-140 <br /> Surrogate:1,2-DCA-d4 _ 60.9 50.0 122 60-140 — <br /> Matrix Spike Dup(1020305-MSD]) Source_S102246-08 - Prepared&Analyzed: 02/28/0I <br /> Methyl tert-butyl ether 114 2.00 ugA 50.0 228 60-140 0.873 25 <br /> Surrogate: 1,2-DCA-d4 55.8 50.0 112 60-140 - <br /> Sequoia 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 /> Page 13 of 14 <br /> I <br />