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a— ) (9404 N Wiget jam <br /> Sequoia Walnut Creels,CA 94598 <br /> Analytical FAX <br /> 25)988-9600 <br /> mw (925)988-9673 <br /> www sequolalabs corn <br /> Gettler Ryan,Inc -Dublin Project Tosco W208192 <br /> 6747 Sierra Court Suite J Project Number Tosco# 11192 Reported <br /> Dublin CA,94568 Project Manager Deanna L Larding 18-Oct-02 12 52 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> .Repornng, Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2H 12008-EPA 5030B(PIT) <br /> i <br /> Blank(2H12008-BLKI) Prepared&Analyzed 12-Aug-02 <br /> Acetone ND 20 ug/l <br /> tert-Butyl acetate ND 20 AF-T <br /> tert-Butyl formate ND 20 AF-T <br /> Ethanol ND 500 s <br /> tert-Butyl alcohol ND 20 " <br /> Methyl tent-butyl ether(MTBE) ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> i <br /> Ethyl cert-butyl ether ND , 20 " <br /> tert-Amyl methyl ether ND 20 <br /> 1,2-Dichloroethane ND 20 " <br /> Ethylene dibromide ND 20 " <br /> Surrogate DibromoJluoromethane 501 500 100 50-150 <br /> Surrogate I 1-Dichloroethane-d4 509 500 101 50-150 . <br /> Surrogate DibromoJluoromethane 501 500 100 50-150 <br /> Surrogate I 1-Dichloroethane-d4 509 500 101 50-150 <br /> Surrogate Toluene-d8 48 9 500 978 50-150 <br /> Surrogate 4-BromoJluorobenzene 500 500 100 50-150 <br /> Blank(2HI2008-BLK2) Prepared&Analyzed 15-Aug-02 <br /> Ethanol ND 500 ug/l <br /> tert-Butyl alcohol ND '20 " <br /> Methyl tert-butyl ether(MTBE) ND 2 0 " <br /> Di-isopropyl ether ND 2 0 " <br /> Ethyl tert-butyl ether ND 2 0 " <br /> tert-Amy]methyl ether ND 20 " <br /> 1,2-Dichloroethane� ND 20 " <br /> Ethylene dibromide ND 2 0 " <br /> Surrogate Dibromolluoromethane 445 500 890 50-150 <br /> Surrogate 12-Dtchloroethane-d4 46 7 500 934 50-150 <br /> Sequoia Analytical -Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> I I of 17 <br />