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Castle Analytical Laboratory, Atwater, CA <br />' Lab Report No H4100107 Date 10/11/2004 Page 6 <br /> Project Name FRONTIER Analysis Volatile Organic Compounds by GC/MS Fuel <br /> Project No 3RD QTR Method 8260FA <br /> Prep Meth SW5030B <br /> Field ID MW-16 Lab Samp ID 7421-7W <br /> Descr/Locatlon MW-16 Recd Date 10/01/2004 <br /> Sample Date 09/30/2004 Prep Date 10/05/2004 <br /> t Sample Time 1410 Analysis Date 10/05/2004 <br /> Matnx Water QC Batch VWMS-0054 <br /> Basis Not Filtered Notes <br />' Analyte Det Limit Rep Limit Note Result Units Pvc Di! <br /> Methyl-tert-butyl ether(MTBE) 0 289 05 MRL ND UG/L 1 <br />' Ethyl tert-butyl ether(ETBE) 0 084 05 MRL ND UG/L 1 <br /> tert-Amyl methyl ether(TAME) 0 067 05 MRL ND UG/L 1 <br /> Di-isopropyl ether(DIPS) 0155 05 MRL ND UG/L 1 <br /> tert-Butyl alcohol (TBA) 879 20 MRL ND UG/L 1 <br />' SURROGATE AND INTERNAL STANDARD RECOVERIES <br /> Toluene-d8 63-132 SLSA 908% 1 <br /> 1,2-Dichloroethane-d4 59-135 SLSA 944% 1 <br /> lie <br /> 1 <br /> 1 <br /> Approved by . �� _ Date <br />