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m <br /> �tf�r <br /> Gettler-Ryan/Gaostrategies(1) Project: Tosco(l) <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 Oxyganated Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical-San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result limit Lints level Result °/aREC limiter RPD limit Notes <br /> Batch 1020033-EPA 5030B [PITT <br /> LCS(1020033-BS2) Prepared&Analyzed:02/13/01 <br /> Methyl tert-butyl ether 49.4 2.00 .ugll 50.0 98.8 70-130 <br /> Surrogate:1,2-Dichloroethane-d4 50.0 50.0 100 76.114 <br /> Surrogate:Toluene-d8 48.7 50.0 97.4 88-110 <br /> Matrix Spike(1020033-MSI) Source:L102053-01 .Prepared&Analyzed:02/09/01 <br /> Methyl tert-butyl ether 54.2 2.00 ug/l 50.0 ND 108 60-140 <br /> Surrogate:l,2-Dichloroethane-d4 54.0 11 50.0 108 76-114 <br /> Surrogate:Toluene-d8 48.9 jo 50.0 97.8 88-110 <br /> Matrix Spike Dup(1020033-MSDI) Source:L102053-01 Prepared&Analyzed:02/09/01 <br /> Methyl tert-butyl ether 44.3 2.00 ugll 50.0 ND 88.6 60-140 20.1 25 <br /> Surrogate:1,1 Dichloroethane-d4 50.5 50.0 101 76-114 <br /> Surrogate:Toluene-d8 49.1 50.0 98.2 88-110 ( + <br /> Batcb 1020041-EPA 5030B PIT <br /> Blank(1020041-BLK1) Prepared&Analyzed:02/13/01 <br /> Ethanol ND 1000 ugll <br /> 1,2-Dibromoethane ND 2.00 <br /> 1,2-Dichlonnethane 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 /> Teri-amyl methyl ether ND 2.00 " <br /> Tertbutyl alcohol ND 100 " <br /> Surrogate:l,1-Dichloroethane-d4 49.5 S0.0 99.0 76-114 <br /> Surrogate:Toluene-d8 49.1 50.0 98.2 88-110 <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 16 of 18 <br />