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Gettler-Ryan/Geostrategies(1) Project: Tosco(1) <br /> 6747 Sierra Court,Suite J Project Number:"Unocal SS#11195 Reported: <br /> Dublin CA,94568 Project Manager: Deanna Harding 02/26/01 14:46 <br /> Volatile Organic 8 Ozyganated Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical- San Carlos <br /> Reporting Spike Source 96REC RPD <br /> lAnslyte Rcsult limit Units Level Resell %REC limits RPD limit N tes <br /> Batch 11020033-EPA 5030B [P/TJ <br /> Blank(1020033-BLKI) Prepared&Analyzed:02/09/01 <br /> Ethanol ND 1000 ugll <br /> 1,2-Dibromoethane ND 2.00 " <br /> 1,2-Dichlorvethane ND 2.00 " <br /> Di-isopropyl ether ND 2.00 „ <br /> Ethyl tert-butyl ether ND 2.00 " <br /> Methyl tai-butyl ether ND 2.00 " <br /> Tert-amyl methyl ether ND 2.00 " <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate:1,2-Dichloroethane-d4 56.1 50.0 . 76-114 <br /> Surrogate:Toluene-849.1 <br /> 50.0 988.1 88-110 <br /> Prepared&Analyzed:02/13/01 <br /> ,::::_:•;_:-iek(1020033-BLKI) <br /> ;ethanol ND 1000 agll <br /> 1,2-Dibromoethanc ND 2.00 " <br /> 1,2-Dichloredhone ND 2.00 <br /> Di-isopropyl ether ND 2.00 „ <br /> Ethyl tert-butyl ether ND 2.00 <br /> Methyl tert-butyl ether ND 2.00 " <br /> Tort-amyl methyl ether ND 2.00 „ <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate:1,2-Dichloroethane-d4 49.5 50.0 99.0 76-114 <br /> Surrogate:Toluene-d8 49.1 50.0 98.2 88-110 <br /> LCS(1020033-BS1) Prepared&Analyzed:02/09/01 <br /> Methyl tett-butyl ether 50.3 2.00 u9/1 50.0 101 70-130 <br /> Surrogate:1.2-Dichloroethane-0 52.3 50.0 105 76-114 <br /> Surrogate:Toluene-d8 48.8 50.0 97.6 88-110 <br /> s <br /> Sequoia 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 15 of 18 <br />