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QA/QC Report <br /> Method Blank Summary <br /> Castle Analytical Laboratory, Atwater, CA <br /> Lab Report No.: H3121802 Date: 12/29/2003 Page: 24 <br /> QC Batch. VWMS-D223 Analysis: Volatile Organic Compounds by GC/MS Fuel <br /> Matrix: Water Method: 8260FA <br /> Lab Samp ID: VWMS-D223 Prep Meth: SW5030B <br /> Analysis Date: 12/22/2003 Prep Date: 12/22/2003 <br /> Basis: Not Filtered Notes: <br /> Analyte Det Limit Rep Limit Note Result Units Pvc Dil <br /> Methyl-cert-butyl ether(MTBE) 0.289 0.5 MRL NO UG/L 1 <br /> Ethyl tert-butyl ether(ETRE) 0.084 0.5 MRL NO UG/L 1 <br /> tert-Amyl methyl ether (TAME) 0.067 0.5 MRL NO UG/L 1 <br /> Di-isopropyl ether(DIPE) 0.155 0.5 MRL ND UG/L 1 <br /> tert-Butyl alcohol (TBA) 8.79 20. MRL NO UG/L 1 <br /> 1,2-Dichloroethane 0.081 0.5 MRL NO UG/L 1 <br /> 1,2-Dibromoethane 0.092 0.5 MRL NO UG/L 1 <br /> SURROGATE AND INTERNAL STANDARD RECOVERIES: <br /> Toluene-d8 76-129 SLSA 108.7% 1 <br /> 1,2-Dichloroethane-d4 53-141 SLSA 91.3% 1 <br /> i <br /> • <br />