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Sequoia 4�N WLane <br /> Walnut Creek CAA 94598 <br /> 6 a- ) (925) 988-9600 <br /> FAX(925) 988-9673 <br /> 14W 0 <br /> Analytical www sequoialabs c <br /> Gettler Rvan bu, -Dublin Project Tosco <br /> 6747 Sierra Court Suite J ProiectNumber Tosco# 11192 Reported <br /> Dublin CA,94568 Project Manager Doug Lee - 10-May-01 1124 <br /> Volatile Organic Compounds by EPA Method 8260E - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> B4tLh 1E07009-EPA 5030B (MeOH) <br /> Blank (IE07009-13LK1) Prepared 04-May-01 Analyzed 09-May-01 <br /> Ethanol ND 25 mg/kg <br /> Cert-Butyl alcohol ND 2 5 <br /> Methyl tert butyl ether ND 0 10 " <br /> Di-isopropyl ether ND 0 10 <br /> Ethyl tert-butyl ether ND 010 <br /> 12-Dschloroethane ND 010 <br /> tert Amyl methyl ether ND 0 10 " <br /> 1,2-Dibromoethane ND 010 <br /> Surrogate Dibroinofluoroinethane 230 250 920 50-150 <br /> Surrogate 1 2-Diehloroethane d4 255 250 102 50-150 <br /> LCS (IE07009-BSI) Prepared 04-May-01 Analyzed 09-May-01 <br /> Methyl tett-butyl ether 191 0 10 mg/kg 2 50 764 70-130 <br /> Surrogate Dibromofluoromethane 235 250 940 50-150 <br /> Surrogate 1 2-Dichloroethane-d4 2 55' 250 102 50-150 <br /> 1' <br /> ----Matrix-Spike(IE07009-MSI)- Source W104569-01-Prepared 04-May-01 Analyzed 09-May-01._.-. <br /> Methyl tert-butyl ether 1 98 0 10 mg/kg 250 ND 792 60 140 <br /> Surrogate Dibromofluoromethane 250 " 2.50 100 50-150 <br /> Surrogate 12-Dichloroethane-d4 2 75 250 110 50-150 <br /> Matrix Spike Dup (1E07009-MSDI) Source W104569-01 Prepared 04-May-01 Analyzed 09-May-01 <br /> Methyl tent-butyl ether 2 20 0 10 mg/kg 2 50 ND 880 60-140 10 5 25 <br /> Surrogate Dibromofluoromethane 255 " 250 102 50-150 <br /> Surrogate 12-Dichloroethane-d4 240 250 960 50 150 <br /> Sequoia Analytical -Walnut Creek 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 /> I <br /> Page 11 of 12 <br />