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819 Sinker Avenue,Suite 8 <br /> Sequoia Sacramento 95834 <br /> (916)9)9 2]-9600 <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs corn <br /> OSECOR International-Rancho Cordova Protect Tosco 1205,Lathrop,CA <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 06/14/02 11 28 <br /> Gasollne\BTEXIOxygenates by EPA method 8260B-Quality Control <br /> Sequoia Analytical - Sacramento <br /> Repotting Spike Source %REC RPD <br /> 5� Result Limit Units Level Result %REC Limits RPD Lunt Notes <br /> Batch 2060131 -EPA 5030B PIT <br /> Blank(2060131-BLKI) Prepared&Analyzed 06/12/02 <br /> Ethanol ND 020 mg/kg <br /> Tert-butyl alcohol ND 0 050 " <br /> Methyl tent-butyl ether ND 00050 " <br /> Di-isopropyl ether ND 00050 " <br /> Ethyl tert-butyl ether ND 00050 " <br /> Tert-amyl methyl ether ND 00050 " <br /> 1,2-Dichloroethane ND 00050 " <br /> 1,2-Dibrornoethane(EDB) ND 00050 " <br /> Benzene ND 00050 „ <br /> Ethylbenzene ND 00050 " <br /> Toluene ND 00050 " <br /> Xylenes(total) ND 0 0050 " <br /> ,mmCiasoline 10) ND 10 " <br /> rrogate 12-DCA-d4 00494 00500 99 60-140 <br /> Surrogate Toluene-d8 00514 00500 103 60-140 <br /> Surrogate 4-BFB 00576 00500 115 60-140 <br /> LCS(2060131-BSI) Prepared&Analyzed 06/12/02 <br /> Methyl tert-butyl ether 00426 00050 mg/kg 00436 98 60-140 <br /> Benzene 00272 00050 00268 101 70-130 <br /> Toluene 0 177 00050 0 162 109 70-130 <br /> Gasoline(C6-C 10) 2 01 10 220 91 70-130 <br /> Surrogate 1 2-DCA-d4 00493 00500 99 60-140 <br /> Surrogate Toluene-d8 00509 " 00500 102 60-140 <br /> Surrogate 4-BFB 00524 00500 105 60-140 <br /> Matrix Spike(2060131-MSI) Source S206140-06 Prepared 06/12/02 Analyzed 06/13/02 <br /> Methyl tent-butyl ether 00415 0 0050 mg/kg 00436 ND 95 60-140 <br /> Benzene 00279 00050 00268 ND 104 60-140 <br /> Toluene 0184 00050 0 162 ND 113 60-140 <br /> Gasoline(C6-C 10) 210 10 220 ND 95 60-140 <br /> Surrogate 12-DCA-d4 00475 00500 95 60-140 <br /> Surrogate Toluene-d8 00513 00500 103 60-140 <br /> Surrogate 4-BFB 00532 00500 106 60-140 <br /> i <br /> quota Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain oJ <br /> custody document This analytical report must be reproduced to its entirety <br /> Page Page 8 of 12 <br />