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Sequoia 404 N WiLane <br /> Walnut 1 t Creek CAA 94598 <br /> (925)988-%W <br /> �,,,,� Analytical FAX equo atabs c 73 <br /> www sequoialabs co <br /> Gettler Ryan Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron#9-8632 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 14-Jun-Ol 11 05 <br /> MTBE Confirmation by EPA Method 8260B - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Ltnuts RPD Limit Notes <br /> Batch 1F13020-EPA 5030E(PM <br /> Blank(IF13020-BLKI) Prepared&Analyzed 13-Jun-01 <br /> Methyl tort-butyl ether ND 20 ug/1 <br /> Surrogate Dibromofluoromethane 452 500 904 50-150 <br /> Surrogate 1 2-Dtchloroethane-d4 477 500 954 54-150 <br /> LCS(1F13020-BSI) Prepared&Analyzed 13-Jun-01 <br /> Methyl tart-butyl ether 513 20 ug/1 500 103 70-130 <br /> Surrogate Dibromofluoromethane 414 500 828 50-150 <br /> Surrogate 1 2-Drchloroethane-d4 454 500 908 50-150 <br /> Matrix Spike(1F13020-MSI) Source W106039-11 Prepared&Analyzed 14-Jun-01 <br /> Methyl tart-butyl ether 540 20 ug/1 500 ND 108 60-150 <br /> Surrogate Drbromofluorornethane 472 500 944 50-150 <br /> Surrogate 12-Drchloroethane-d4 501 500 100 50-150 <br /> Matrix Spike Dup(iF13020-MSD1) Source W106039-11 Prepared&Analyzed 14-Jun-01 <br /> Methyl tent-butyl ether 544 20 ug/i 500 ND 109 60-150 0 738 25 <br /> Surrogate Dibromofluoromethane 485 Soo 970 50-150 <br /> Surrogate 1 2-Dichloroethane-d4 493 500 986 50-150 <br /> Sequoia Analytical -Walnut Creek The results to this report apply to the samples analyzed in accordance with the ch <br /> custody document Tins analytical report must be reproduced in its entr <br /> Page I1 of 13 <br />