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0 <br /> Gettler-Ryan/Geostrategies(1) Protect Unocal(4) <br /> 6747 Sierra Court,Suite J ProjectNumber Former Unocal SS#0187 Repot <br /> Dublin CA,94568 Project Manager Deanna Harding 05/30/01 13 32 <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical- San Carlos <br /> Reporting Spike Source %RFC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD limit Notes <br /> Batch 1050076-EPA 5030B PIT <br /> Blank(1050076-BLKI) Prepared&Analyzed 05/17/01 <br /> Ethanol ND 1000 u9/1 <br /> Tert-butyl alcohol ND 100 " <br /> Methyl tent-butyl ether ND 200 " <br /> Di-isopropyl ether ND 200 " <br /> Ethyl ted-butyl ether ND 200 " <br /> Tert-amyl methyl ether ND 200 " <br /> Surrogate 1 2-Dichloroethane-d4 411 500 822 76-114 <br /> Blank(1050076-BLK2) Prepared&Analyzed 05/18/01 <br /> Ethanol ND 1000 119/1 <br /> -butyl alcohol ND 100 " <br /> yl tert butyl ether ND 200 " <br /> t-isopropyl ether ND 200 " <br /> Ethyl tent-butyl ether ND 200 " <br /> Tert-amyl methyl ether ND 200 " <br /> Surrogate 12-Dichloroethane-d4 436 " 500 872 76-114 <br /> LCS(1050076-BSI) Prepared&Analyzed 05/17/01 <br /> Methyl tert-butyl ether 414 200 119/1 Soo 828 70-130 <br /> Surrogate 1 2-Dichloroethane-d4 413 500 826 76-114 <br /> LCS(1050076-BS2) Prepared&Analyzed 05/18/01 <br /> Methyl tert-butyl ether 425 200 ug/1 500 850 70-130 <br /> Surrogate 1,2 Dichloroethane-d4 447 500 894 76.114 <br /> Matrix Spike(1050076-MSI) Source L105103-02 Prepared&Analyzed 05/17/01 <br /> Methyl tert-butyl ether 425 200 ugd 500 ND 850 60-140 <br /> Surrogate 11-Dichloroethane-d4 445 500 890 76-114 <br /> uoia 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 28 of 33 <br />