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• <br /> Gettler-Ryan/Geostrategies(l) Prod-t Tosco(1) <br /> 6747 Sierra Court, Suite J Proj-I Niimber Unocal Circle K SS#1205,Lathrop,CA Reported <br /> Dublin CA,94568 Project Manages Deanna Harding 08/03/01 13 39 <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method-8260B - Quality Control _ _ <br /> Sequoia Analytical - San Carlos <br /> 13"ntng Spite source %REC RPD <br /> Analyte Result Limn Units Level Result %REC Limits RPD Ltmn Notes <br /> Batch 1070113 -EPA 5030B {PIT <br /> Blank(1070113-BLK1) Prepared&Analyzed 07/24/01 <br /> Ethanol ND 1000 U911 <br /> 1,2-Dibromoethane ND 20 " <br /> 1,2-Dichloroethane ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tent-butyl ether ND 20 " <br /> Methyl tert-butyl ether ND 20 " <br /> Ten-amyl methyl ether ND 20 " <br /> Ten-butyl alcohol ND 100 " <br /> Surrogate 1 2-Dichloroethane-d4 301 500 100 76-114 <br /> Surrogate Toluene-d8 499 500 998 88-110 <br /> Blank(1070113-BLK2) Prepared&Analyzed 07/25/01 <br /> Ethanol ND 1000 ug/l <br /> 1,2-Dibromoethane ND 20 " <br /> 1,2-Dtchloroethane ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> Methyl tert-butyl ether ND 20 " <br /> Ten-amyl methyl ether ND 20 <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 12-Dichloroethane-d4 503 500 101 76-114 <br /> Surrogate Toluene-d8 505 500 101 88-110 <br /> LCS(1070113-BSI) Prepared&Analyzed 07/24/01 <br /> Methyl ten-butyl ether -- 47 1 20 ug/1 Soo 942 70-130 <br /> Surrogate 1 2-Dtchloroethane-d4 48 7 500 974 76-114 <br /> Surrogate Toluene-d8 500 500 100 88-110 <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analyzed in accordance with the ch <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 11 of 14 <br />