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Seq155E ,Cal Road <br /> u 0]�a San Carlos,CA 94070 <br /> (650)232 9600 <br /> '4W Analytical FAX(650)232-9612 <br /> www sequoialabs cam <br /> ler-Ryan/G eostrategies(1) Project Unocal(4) L208033 <br /> 7 Sierra Court,Suite J Project Number Former Unocal#0187 Stockton Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 08/29/02 07 10 <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Lunits RPD Lunt Notes <br /> Batch 2080017-EPA 5030B JP/TJ <br /> Blank(2080077-BLKI) Prepared&Analyzed 08/16/02 <br /> LaboratorX Control Sample (2080017-BSI) _ Prepared&Analyzed 08/16/02 _ W <br /> Methyl ten-butyl ether 601 10 ugh 500 120 70-130 <br /> Surrogate 12-Dtchloroethone-d4 560 11 500 111 70-130 <br /> Matrix Spike(2080017-MSI) Source L208033-19 Prepared&Analyzed _08/16/02 <br /> Methyl ten-butyl ether 645 10 ug/l 500 ND 129 60-140 <br /> Surrogate 1,1-Dtchloroethane-d4 538 11 500 108 70-130 <br /> Matrix Spike Du (2080017-1%ISDI) Source L208033-19 Prepared&Analyzed 08/16/02 <br /> 0 I tert-butyl ether 640 10 ug/l Soo ND 128 60-140 0 778 25 <br /> Surrogate 1,1-Dichloroethane-d4 544 11 500 109 70-130 <br /> �ta Analytical -San Carlos The results to this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless othem ise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 24 of 36 <br />