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Castle Analytical Laboratory, Atwater, CA <br /> Lab Report No H4100107 Date 10/11/2004 Page 10 <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-3R GRAB Lab Samp ID 7421-10W <br /> Descr/Location MW-3R Rec'd Date 10/01/2004 <br /> Sample Date 09/30/2004 Prep Date 10/05/2004 <br />' Sample Time 1900 Analysis Date 10/05/2004 <br /> Matrix Water QC Batch VWMS-0054 <br /> Basis Not Filtered Notes DF <br /> Analyte Det. Limit Rep Limit Note Result Units Pvc Did <br /> Methyl-tert-butyl ether(MTBE) 289 500 MRL 43000. UG/L 1000 <br /> Ethyl tent-butyl ether(ETBE) 84 50 MRL 79. UGIL 100 <br />' tert-Amyl methyl ether(TAME) 67 50 MRL 8& UG/L 100 <br /> Di-isopropyl ether(DIPS) 155 50 MRL ND UG/L 100 <br /> tert-But I alcohol (TBA) 879 2000 MRL ND UG/L 100 <br /> SURROGATE AND INTERNAL STANDARD RECOVERIES <br /> Toluene-d8 63-132 SLSA 881% 1 <br /> 1,2-Dichloroethane-d4 59`135 SLSA 106% 1 <br />' DF Reporting limits elevated due to matrix interferences <br /> I <br /> r <br /> • <br /> Approved by Date t I �- <br />