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404 N Wlget Lane <br /> 1 Sequoia Walnut Creek,CA 94598 <br /> (925)988-9G00 <br /> FAX(925)%8-9[73 <br /> 4D_ Analytical www setluoWabs COrn <br /> Gettler Ryan,Inc -Dublin Project 'Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco# 11192 Reported <br /> Dublin CA,94568 Project Manager Doug Lee 18-Jan-01 09 07 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Repoiting Spike Source %REC RPD <br /> Analyte Result Lunt Units Level Result %REC Limits RPD Ltnut Notes <br /> Batch 1AOS024-EPA 5030B [PIT] <br /> Blank(1A08024-BLK1) Prepared&Analyzed 08-Jan-01 <br /> Ethanol ND 500 ug/1 <br /> tert-Butyl alcohol ND 50 " <br /> Methyl tent-butyl ether ND 20 " <br /> Do-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> tett-Amyl methyl ether ND 20 " <br /> Surrogate DibromoJluoromethane 470 Soo 940 50-150 <br /> Surrogate 1 2 Drchloroethane-d4 390 Soo 78 0 50-150 <br /> Blank(1A08024-BLK2) Prepared&Analyzed 09-Jan-01 <br /> Ethanol ND 500 ug/1 <br /> tett-Butyl alcohol ND 50 <br /> Methyl tert-butyl ether a ND w 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 <br /> tert-Amyl methyl ether ND 20 " <br /> Surrogate Drbromojluoromethane 450 500 900 50.150 <br /> Surrogate 1,1-Dtchloroethane-d4 380 500 760 50-150 <br /> LCS(1A08024-BS1) Prepared&Analyzed 08-Jan-01 <br /> Methyl tert-butyl ether 413 20 ug/l 500 826 70-130 <br /> Surrogate DibromgJluoromethane 480 500 _ _ 960 50-150 <br /> Surrogate 1,2Drch1oroe1hane-d4 380 500 760 50-I50 <br /> LCS(1A08024-BS2) Prepared&Analyzed 09-Jan-01 <br /> Methyl tart-butyl ether 390 20 —ug/1 500 780 -70-130 <br /> Surrogate Drbromojluorromethone 470 500 940 50-150 <br /> Surrogate 1 2-Dichloroethane-d4 380 Soo 760 50.150 <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the smnples analyzed in accordance with the char <br /> custody document This analytical report must be reproduced in its entr <br /> Page 5 of 7 <br />