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404 N Wlget Lane <br /> Sequoia '' Walnut Creek CA 945% <br /> (925)988-9600 <br /> FAX(9Z5)98&9673 <br /> Analytical www <br /> �„� <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> -6747 Sierra Court-Suite J Project Number-Chevron#9-6171• —Reported — <br /> Dublin CA,94568 Project Manager Deanna L Hardmg 12-Jun-01 07 52 <br /> ' Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical -Walnut Creek x <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %FXC Limits RPD Limit Notes <br /> Batch 1E30011 - EPA 5030B (PIT) <br /> Blank(IE3001I-BLK1) Prepared&Analyzed 30-May-01 <br /> Ethanol ND 500 ug/l <br /> tert-Butyl alcohol ND 20 " <br /> Methyl Cert-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tent-butyl ether ND 20 <br /> tert-Amyl methyl ether ND 20 - _ n <br /> 1,2-Dichloroethane ND 20 " <br /> Ethylene dibromide ND 20 " <br /> Surrogate Dibromofluoromethane 520 500 104 50-150 <br /> Surrogate 1 1-Drchloroethane-d4 570 500 114 50-150 <br /> Blank(1E30011-BLK2) Prepared&Analyzed 05-Jun-01 <br /> Ethanol ND 500 ug/I <br /> tert-Butyl alcohol ND 20 " <br /> Methyl tent-butyl ether ND 20 " <br /> Do-isopropyl ether ND 20 " <br /> Ethyl tent-butyl ether ND - 20 <br /> tert-Amyl methyl ether ND 20 " <br /> 1,2-Dichloroethane ND 20 <br /> Ethylene dibronude ND 20 _ <br /> Surrogate Dibromofluoromethane 270 250 108 50-150 <br /> Surrogate 11 Dichloroethane-d4 240 250 960 50-150 <br /> Blank(IE30011-BLK3) Prepared&Analyzed 07-Jun-01 <br /> Ethanol ND 500 ug/l <br /> tert-Butyl alcohol ND 20 " <br /> Methyl tent-butyl ether ND_ 20 <br /> Di-isopropyl ether ND 20 - <br /> Ethyl tert-butyl ether ND 20 " <br /> tert-Amyl methyl ether ND 20 " <br /> M-1 2-Dichloroethane- - - _ ND 20--_ <br /> Ethylene dibromide ND 20 " <br /> Surrogate Dibromofluoromelhane 260 250 104 50-150 <br /> Surrogate 1 1-Drchloroeihane-d4 240 250 960 50-150 <br /> Sequoia Analytical-Walnut Creek The results in tits report apply to the samples analyzed in accordance with the ch <br /> custody document This analytical report must be reproduced to its eni <br /> Page 10 of 13 <br /> ,4�k <br />