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1 tL F <br /> 404 N Wiget Lane <br /> Sequoia Walnut Creels -9600 <br /> 94598 <br /> (925)98 988-9600 <br /> FAX(925)%&%73 <br /> Analytical www sequolalabs coin <br /> so <br /> Gettler Ryan,Inc -Dublin project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron 4 9-6258 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 2l-Nov-00 07 54 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> byte Result Limit Units Level Result %REC Luiuts RPD Limit Notes <br /> Batch OK09015-EPA 5030B[P/TI <br /> LCS(OK09015-BSI) Prepared&Analyzed 09-NOV-00 <br /> Methyl Cert-butyl ether 528 20 ug/1 500 106 70-130 <br /> Surrogate Drbromofluoromethane <br /> 520 500 104 50-150 <br /> Surrogate 1 1-Dichloroethane-d4 480 500 960 50-150 <br /> LCS(OK09015-BS2) Prepared&Analyzed 10-Nov-00 <br /> Methyl tert-butyl ether <br /> Soo 20 ug/1 500 100 70-130 <br /> Surrogate Drbromofluoromethane 510 500 102 50-150 <br /> Surrogate 12-Drchloroethane-d4 <br /> 470 500 940 50-150 <br /> Matrix Spike(OK09015-MSI) Source W010690-06 Prepared&Analyzed 09-Nov-00 <br /> 0 60-150 <br /> Methyl tent-butyl ether 46 0 2 D ug/l 50 0 ND 92 <br /> 51 0 50 0 101 50-150 - <br /> S ate Dibromofluoromethane 840 50-150 <br /> e 1 1-Drchloroed wne-d4 420 500 <br /> Matrix Spike Dug(OK09015-MSD1) Source W010690-06 Prepared&Analyzed 09-Nov-00 <br /> 0 25 <br /> Methyl frit-butyl ether 529 2 0 ug/l 50 0 ND 106 50-150 14 <br /> Surrogate Dibromofluoromethane 510 I' So 0 102 50-150 <br /> Surrogate 11-Duhloroedume-d4 440 <br /> Soo 8�0 50150 <br /> AI13]y11G81-Walnut Creek custody <br /> results in tins report apply to the samples analyzed in accordance with the clown of <br /> ia custody document Tins analytical report must be reproduced to its entirety <br /> Page 8 of 11 <br />