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404 N Wiget Lane <br /> Sequoia Walnut Creek CA <br /> 94598 <br /> (925)988-96M-9ry00 <br /> FAX(925)988-9673 <br /> 14CO Analytical www sequoWabs coin <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite j Project Number Chevron 4 9-2033 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 15-Jun-01 10 47 <br /> MTBE Confirmation by EPA Method 8260B - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> ,Analyte Result Limit Urnts Level Result %REC Limits RPD Lirrut Notes <br /> Batch 1F01016 -FPA 5030B(PIT) <br /> Blank(1F01016-BLK1) Prepared&Analyzed 31-May-01 <br /> Methyl tent-butyl ether ND 20 ug/1 <br /> Surrogate Dibromojluoromethane 449 500 898 50-150 <br /> Surrogate 1 2-Dichloroethane-d4 471 Soo 944 50-150 <br /> Blank(1F01016-BLK2) Prepared&Analyzed 01-Jun-01 <br /> Methyl tert-butyl ether ND 20 ug/I <br /> Surrogate Dibromojluoromethane 462 " Soo 924 50-150 <br /> Surrogate 1 2-Dichloroethane-d4 465 500 930 50-150 <br /> LCS(1F01016-BS1) Prepared&Analyzed 31-May-OI <br /> Methyl Cert-butyl ether 463 20 ug/1 500 926 70-130 <br /> Surrogate Dibroinofluoromethane 453 500 906 50-150 <br /> Surrogate 1 2-Dichloroethane-d4 451 500 902 50-150 <br /> LCS Dup (1F01016-BSD1) Prepared&Analyzed O1-Jun-01 <br /> Methyl tett-butyl ether 485 20 ug/1 500 970 70-130 464 25 <br />-- Surrogate DibromoJluoromethane — _ —464 —_500__ 928_ 50-150___ <br /> Surrogate 1 1-Dichloroethane-d4 464 Soo 918 50-150 <br /> Sequoia Analytical -Walnut Creek The results in this report apply to the samples analyzed in accordance with the char <br /> custody document This analytical report must he reproduced in its enti <br /> Page 15 of 24 <br />