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Castle Analytical Laboratory,Atwater, CA <br />• Lab Report No.: H3121802 Date: 12/29/2003 Page: 1 <br /> Project Name: OLIVAREZ PROPERTY Analysis: Volatile Organic Compounds by GC/MS Fuel <br /> Project No: NA Method: 8260FA <br /> Prep Meth: SW5030B <br /> Field ID: EW-1 Lab Samp ID: 6447-10W <br /> Descr/Location: EW-1 Recd Dake: 12/18/2003 <br /> Sample Date: 12/17/2003 Prep Date: 12/22/2003 <br /> Sample Time: 1330 Analysis Date: 12/22/2003 <br /> Matrix: Water QC Batch: VWMS-D223 <br /> Basis: Not Filtered Notes: OF <br /> Analyte Det Limit Rep Limit Note Result Units Pvc Dil <br /> Methyl-tert-butyl ether(MTBE) 28.9 5o. MRL 110(1 UG/L 100 <br /> Ethyl tert-butyl ether(ETBE) 8.40 50. MRL NO UG/L 100 <br /> tert-Amyl methyl ether(TAME) 6.70 50. MRL NO UG/L 100 <br /> Di-isopropyl ether(DIPE) 15.5 50. MRL NO UG/L 100 <br /> tert-Butyl alcohol (TBA) 879. 2000. MRL NO UG/L 100 <br /> 1,2-Dichloroethane 8.10 50. MRL 36a UG/L 100 <br /> 1,2-Dibromoethane 9.20 50. MRL 420. UG/L 100 <br /> SURROGATE AND INTERNAL STANDARD RECOVERIES: <br /> Toluene-d8 76-129 SLSA 125% 1 <br /> 1,2-Dichloroethane-d4 53-141 SLSA 98.4% 1 <br /> DF: Reporting limits elevated due to matrix interferences <br /> Approved by:_ I '�, Date: <br />