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iCastle Analytical Laboratory, Atwater, CA <br /> ILab Report No H4010717 Date 01/16/2004 Page 8 <br /> Protect Name DARPETRO#8 Analysis Volatile Organic Compounds by GC/MS Fuel <br /> Protect No NA Method 8260FA <br /> Prep Meth SW5030B <br /> 1 Field ID MW-4 Lab Samp ID 6508-4W <br /> Descr/Location MW-4 Rec'd Date 01/08/2004 <br /> Sample Date 01/06/2004 Prep Date 01/12/2004 <br />' Sample Time 1555 Analysis Date 01/12/2004 <br /> Matrix Water QC Batch VWMS-1124 <br /> Basis Not Filtered Notes <br />' Analyte Det Limit Rep Limit Note Result Units Pvc DEI <br /> Methyl-tent-butyl ether(MTBE) 0 289 05 MRL 6.3 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 76-129 SLSA 119% 1 <br /> 1,2-Dichloroethane-d4 53-141 SLSA 114% 1 <br /> i <br /> I <br /> I <br /> I <br /> • <br /> I { <br /> Approved by Date l <br /> I <br />