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m <br /> Sequoia 404" Wilme <br /> 5% <br /> Walnut Geek CA A 94598 - <br /> (925)98&%W <br /> Analytical www sequoFig �falabs wquooom <br /> Gettler Ryan,Inc -Dublm Project. Tosca <br /> 6747 Sierra Court Suite J Project Number Tosco#4409 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 06-Feb-01 17 21 <br /> Volatile organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Linut Notes <br /> Batch 1A24014-EPA 5030B[PIT] <br /> Blank(1A24014-BLKI) Prepared&Analyzed 24-Jan-0I <br /> Ethanol ND 500 ugll <br /> Cert-Butyl alcohol ND 50 " <br /> Methyl tat-butyl ether ND 20 " <br /> Di-isopropyl ether Nb 20 " <br /> Ethyl tort-butyl ether ND 20 " <br /> tori-Amyl methyl ether ND ,2 0 " <br /> 1,2-Drchloroethane ND 20 " <br /> Ethylene drbromrde ND 20 " <br /> Surrogate Drbromofluorvmetharte 539 Soo 1018 50-150 <br /> Surrogate 11 Duchlor+oeflunw-d4 '454 500 908 SO-150 <br /> Blank(1A24014-BLK2) Prepared&Analyzed 25-Jan-01 <br /> Ethanol ND 500 ug4 <br /> tort-Butyl alcohol ND 50 " <br /> Ip <br /> Methyl uctrbutyl ether ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> tori-Amyl methyl ether ND 20 " <br /> 1,2-Dichloroethane ND 20 " <br /> Ethylene drbromude ND 20 " <br /> Srmogate DrbromofIuoromed mre 58.3 500 117 5&150 <br /> Srmngare 1,1 Dichloroedwuw-d4 514 500 103 50-150 <br /> LCS(1A24014-BSI) Prepared&Analyzed 24-Jan-01 <br /> Methyl tat-butyl ether 527 20 ugll 500 105 70-130 <br /> Surrogate Drbromofluoromethaae 540 " Soo 108 50-150 <br /> Surrogate 12 Drehloroetham d4 446 Soo 891 50.150 <br /> Sequoia Analytical-Walnut Creek The results in thus repon apply to the samples wed w accor ko"with the chain Oak <br /> custody document Tins analyAcal repon must be reproduced in ru enhrroW <br /> 1 <br /> Page 9 of 12 <br />