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h5 <br /> 5 <br /> Gettler-Ryan/Geostrategies(l) Project Unocal(4) <br /> 6747 Sierra Court, Suite J Prosect Number Former Unocal SS#0187 Reported <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 "hREC RPD <br /> Analyte - _ _ __ Result _Jima Units Level Result %REC Umits — RPD Limit - Notes - <br /> Batch 1050076-EPA 5030B [P/Tl <br /> Matrix Spike Du (1050076-MSDI) Source.L105103-02 Prepared&Analyzed 05/17/01 <br /> Methyl tert-butyl ether 438 200 u9/1 500 ND 876 60-140 301 25 <br /> Surrogate 1,2 Dichloroethane-d4 441 500 881 76-114 <br /> Batch 1050081 -EPA 5030B [P/Tl <br /> Blank(1050081-BLK1) Prepared&Analyzed 05/18/01 <br /> Ethanol ND 1000 ug/l <br /> Tert-butyl alcohol ND 100 <br /> Methyl tert-butyl ether v ND 200 " <br /> Do-isopropyl ether ND 200 " <br /> Ethyl tert-butyl ether _ ND 200 _ <br /> _Teri-amyl ine_thyl ether_ ND 200 " <br /> Surrogate 1 2-Dichloroethane-d4 43 6 500 872 76-114 <br /> Blank(1050081-BLK2) Prepared&Analyzed 05/19/01 <br /> Ethanol ND 1000 ug/l <br />_._Tert-butyl alcohol <br /> Methyl tert-butyl ether ND 200 " <br />_-- M-isopropyl ether— ------ -----ND---�-200-- <br /> Ethyl tert-butyl ether ND 200 <br /> Tert-amyl methyl ether--- "ND-=---- =2 00-- <br /> Surrogate <br /> 0-Surrogate 1,2 Dichloroethane-d4 428 Soo 856 76-114 <br /> LCS(1050081-BSI) Prepared&Analyzed 05/18/01 <br /> Methyl tert-butyl ether 425 200 ug/l 500 850 70-130 <br /> Surrogate 1 1-Dichloroethane-d4 447 500 894 76-114 <br /> Sequoia Analytical-San Carlos The results in this report apply to the samples analyzed in accordance with the cha <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 29 of 33 <br />