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Castle Analytical Laboratory, Atwater, CA <br /> Lab Report No.: H4122010 Date: 12/29/2004 Page: 2 <br /> Projed Name: OLIVAREZ PROPERTY Analysis: Volatile Organic Compounds by GC/MS Fuel <br /> Project No: NA Method: 8250FA <br /> Prep Meth: SW5030B <br /> Field ID. MW-1 <br /> Lab Samp ID: 7660-1 W <br /> Descx/l-ovation: MW 1 Rev'd Date: 12=/2004 <br /> Sample Date: 12/16/2004 Prep Date: 12/2312004 <br /> Sample Time: 1612 Analysis Date: 12/23/2004 <br /> Matrix: Water QC Batch: VWMS-D234 <br /> Basis: Not Filtered Notes: DF <br /> Analyte Det Limit Rep Limit Note Result Units Pvc Dil <br /> Methyl-tent-butyl ether(MTBE) 28.9 50. MRL 51a UG/L 100 <br /> Ethyl tort-butyl ether(ETRE) &40 50. MRL ND UG/L 100 <br /> tert-Amyl methyl ether(TAME) &70 50. MRL ND UG/L 100 <br /> DI-Isopropyl ether(RIPE) 15.5 50. MRL ND UG/L 100 <br /> tert-Butyl alcohol (TBA) 879. 2000. MRL ND UG/L 100 <br /> 1,2-Dichlomethane &10 50. MRL 320 UG/L 100 <br /> 1,2-Dibromoethane 9.20 50. MRL 1 10a UG/L 100 <br /> SURROGATE AND INTERNAL STANDARD RECOVERIES: <br /> Toluene-d8 63-132 SLSA 97.7% 1 <br /> 1,2-Dichloroethane44 58135 SLSA 90.5% 1 <br /> DF: Reporting limits elevated due to matrix interferences <br /> Approved by: fV17 Date: � Z�. <br />