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1551 Industrial Road <br /> San Wcs,CA 94070-411 1 <br /> Sequoia (650)232-9600 <br /> 4,-!D- FAX(650)232-612 <br /> Analytical ,nirvw sequolalabs corn <br /> ,0 <br /> &-tler-RyaWCYeostrategres(1) Project Toseo(5)-ZZ <br /> 6747 Sterna Court,Surte] Project Number Tosco(Unocal)SS#6981 Reported <br /> Dublm CA,94568 Project Manager Deanna Harding 01/11/01 13 54 <br /> Volatile Organic Oxyganated 8 Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical-San Carlos <br /> Reporting Spike Source %REC RPD <br /> Ataly0e Result Ltmrt Units Level Result %REC Eunits RPD L inut Notes <br /> Batch 1010020-EPA 5030B /T <br /> LCS(1010020-13S2) Prepared&Analyzed 01/09/01 <br /> Methyl tort-butyl ether 534 200 u&4 500 107 70-130 <br /> Surrogate 1,1-Drchloroethan"4 S24 Soo 105 76-114 <br /> Surrogate Toluene-d8 508 Soo 102 88-110 <br /> Matrix Spike(1010020-MSI) Source L012210-14 Prepared&Analyzed 01/05/01 <br /> Methyl tat-butyl ether 456 200 ug/l 500 ND 912 60-140 <br /> Surrogate 1,2-Dichloraethaned4 453 Soo 906 76-114 <br /> Surrogate Toluene-d8 498 500 996 88-110 <br /> Matrix Spike Dup(1010020-MSDI) Source L012210-14 Prepared&Analyzed 01/05/01 <br /> methyl tert-butyl ether 466 200 ug/1 500 ND 932 60-140 217 25 <br /> ate 1,2-Dichloraedhane-d4 462 500 914 76-114 <br /> Surrogate Toluene-d8 497 Soo 994 88-110 <br /> 1101 i Analytical-San Carlos The results in this report apply to the samples analyzed m accordance with the chain or <br /> custody document.This analytical report must be reproduced In its entirety <br /> Page 26 of 27 <br />