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S� <br /> A. <br /> Gettler-Ryan/Geostrategtes(1) Project Tosco(l) <br /> 6747 Sierra Court, Suite J Project Number Unocal Circle K SS#1205,Lathrop,CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 05/10/01 15 16 <br /> Volatile Organic 8 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 Limits RPD limit Notes <br /> Batch 1040099-EPA 5030B [PITT <br /> Blank(1040099-BLK1) Prepared&Analyzed 04/27/01 <br /> Ethanol NO 1000 ug/1 <br /> 1,2-Dibmmoethane ND 200 " <br /> 1,2-Dtchloroethane NO 200 <br /> Di-isopropyl ether NO 200 " <br /> Ethyl tert-butyl ether NO 200 " <br /> Methyl tett-butyl ether NO 200 " <br /> Tert-amyl methyl ether ND 200 " <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 1 2-Dtchloroethane-d4 455 " 500 910 76-114 <br /> Surrogate Toluene-d8 308 500 102 88-110 <br /> Blank(1040099-BLK2) Prepared&Analyzed 04/27/01 <br /> Ethanol NO 1000 ug/1 <br /> 1,2-Dibromoethane NO 200 " <br /> 1,2-Dtchloroethane ND 200 " <br /> Dt-tsopropy]ether ND 200 " <br /> Ethyl tert-butyl ether ND 200 " <br /> Methyl tent-butyl ether NO 200 " <br /> Tert-amyl methyl ether NO 200 " <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 1,2-Dtchloroethane-d4 471 500 941 76-114 <br /> Surrogate Toluene-d8 493 500 986 88-110 <br /> Blank(1040099-BLK3) Prepared&Analyzed 04/30/01 <br /> Ethanol ND 1000 USA <br /> 1,2-Dibromoethane ND 200 <br /> 1,2-Dtchloroethane ND 200 " <br /> Di-isopropyl ether NO 200 " <br /> Ethyl tett-butyl ether NO 200 " <br /> Methyl tert-butyl ether NO 200 " <br /> Tert-amyl methyl ether NO 200 <br /> Tert-butyl alcohol NO 100 " <br /> Surrogate 1 2-Dtchloroethane-d4 435 500 870 76-114 <br /> Surrogate Toluene-d8 508 500 101 88-110 <br /> Sequota 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 13 of 16 <br />