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404 N Wiget Lane <br /> Walnut Geek.CA 94598 <br /> 4 Sequoia (925)988-9600 <br /> 15- )— FAX(925)988-9673 <br /> Analytical www mquoIatabs`am <br /> dw <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco#4409 Reported <br /> Dubhn CA,94568 Project Manager Deanna L Harding 06-Feb-01 17 21 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source °/aREC RPD <br /> Analyte Result Lmut Unrts Level Result a/oREC Units RPD Lurut Notes <br /> Batch 1A24014-EPA 5030B [PIT] <br /> LCS(1A24014-BS2) Prepared&Analyzed 25-Jan-01 <br /> Methyl tart-butyl ether 574 20 ug/I 500 115 70-130 <br /> Surrogate Dibromofhroromethane 593 Soo 119 50.1 SO <br /> Surrogate 1,1 Dlehloroedwne-d4 512 " Soo 101 50.150 <br /> Matnx Spike(IA24014-MSI) Source W101522-02 Prepared&Analyzed 24-Jan-01 <br /> Methyl ted-butyl ether 456 20 ugd 500 ND 912 60-150 <br /> Surrogate Dibromofluoromedume 544 Soo 109 50-150 <br /> Surrogate 1,2-Dichlomethane-d4 46 0 500 910 50-150 <br /> Matra Spike Dup(1A24014-MSD1) Source W101522-02 Prepared&Analyzed 24-Jan-01 <br /> Methyl telt-butyl ether 520 20 uga 500 ND 104 60-150 131 25 <br /> Surrogate Dibromtfluoromethane 559 SOO 111 50-150 <br /> *11 <br /> 1,1 Drchloroethww d4 470 " 500 940 50-150 <br /> ia A>Da1ytical-Walnut Creek The results in this report apply to the samples wed in aceordamx with the chain of <br /> custody document This onabocal report must be rrepnxtuced in its eMdnety <br /> Page 10 of 12 <br />