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(D (65Sequoia 1551 nal hued ' <br /> San Carlos <br /> CA 94670 <br /> Analytical FAX <br /> 0)232 9600 <br /> (650)232-9612 <br /> www sequoialabs cam <br /> Gettler-Ryan/Geostrategies(1) Project Unocal(4) <br /> 6747 Sierra Court,Suite J Project Number Former ilnocal 95098,Stockton Reported <br /> Dublin CA,94568 Project Manager Deanna Harding _ 01/01/02 07 46 <br /> BTEX by EPA Method 8260B - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source °/aREC LL RPD <br /> Analyte Result Limit Units Level Result %RFC Limits RPD Limit Notes , <br /> Bateb 2060239-EPA 5030B�1T] <br /> _Matrix Spike Dup(2060239-MSDI) - Source S206231-05 Prepared&Analyzed 06/19/02_ s ^ <br /> Methyl tert-butyl ether 123 050 ug/l 109 ND 113 60-140 16 25 - <br /> Benzene 713 050 670 ND 106 70-130 8 25 <br /> 'toluene 404 050 405 ND 100 70-130 2 25 <br /> Gasoline(C6-C10) 490 50 550 ND 89 60-140 1 25 <br /> Surrogate Toluene-d8 247 250 99 60-140 <br /> Surrogate 4-BFB 246 15 0 98 60-140 <br /> Surrogate 1,1-DC.4-d4 303 250 111 60-140 <br /> r <br /> 1 <br /> Sequoia Analytical - San Carlos 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 102 of 103 , <br />