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IM `` <br /> I� T <br /> li 885 Jarvis Drive <br /> Morgan Hill,CA 95037 <br /> Sequoia (408)776-9500 <br /> FAX(408)782$308 <br /> it www.sequoialabs.com <br /> Analytical <br /> 4 II <br /> Gettler Ryan/Geostrategies-Tosco/Unocal Project: - �� <br /> 6747 Sierra Ct,Suite l Project Number: Unocal SS#08671 � Reported: <br /> Dublin CA,94568 Project Manager: Deanna Harding <br /> 06/12/01 18:10 1 <br /> Volatile Organic Compounds by EPA Method 8260A- Quality Control <br /> Sequoia Analytical -Morgan Hill <br /> Reporting Spike Source I� %PIEC RPD <br /> Analyte <br /> Result Limit Units Lerel Result °/,REC Limits RPD Limit Notes h <br /> � <br /> Batch 1F06001 -EPA 5030B PIT <br /> LCS Dup(1F06001-ESDI) Prepared&Analyzed:06/05/01 <br /> Methyl tent-butyl ether 7.87 1.00 ugA )0.0 78.7 70-130 12.5 25 <br /> Surrogate:1,2-Dichloroethane-d4 9.83 10.0 9$.3 70-130 <br /> LCS Dup(IF06001-BSD2) Prepared&Analyzed:06105/01 M <br /> Methyl tent-butyl ether 7.18 1.00 ug/I 10.0 71!8 70-130 9.17 25 <br /> Surrogate:1,2-Dichloroethane-d4 8.81 10.0 88:1 70-130 <br /> ;I <br /> Matrix Spike(1F06001-MSI) Source:MKE0625-01 Prepared&Analyzed:06/05/01 <br /> Methyl tert-butyl ether 9.96 1.00 ug/1 10.0 ND 99.6 70-130 <br /> Surrogate:1,2-Dichloroethane-d4 9.78 10.0 97.8 70-130 0 <br /> I! <br /> ` rix Spike Dup(1F06001-MSDI) Source:MKE0625-01 Prepared&Analyzed:06/05/01 <br /> TA-thyl tert-butyl ether 8.17 1.00 ugA 14.0 ND 81.7 70-130 19.7 25 <br /> Surrogate:1,2-Dichloroethane-d4 9.42 10.0 94.2 70-130 <br /> I! <br /> l <br /> I� <br /> li 1 <br /> :E <br /> j <br /> i <br /> it <br /> ii <br /> A� <br /> ` The results in this report apply to the samples analysed in accordance with the chain of <br /> Sequ01a Analytical-Morgan Hill <br /> custody document. This analytical report must be reproduced in its entirety. <br /> i1 <br /> I <br /> Page Page 9 of 10 <br />