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ICastle Analytical Laboratory, Atwater, CA <br /> Lab Report No H4041503 Date 04/23/2004 r Page 7 <br /> Project Name DARPETRO#8 Analysis Volatile Organic Compounds by GC/MS fuel <br />' Project No NA Method 8260FA <br /> Prep Meth SW5030B <br />' Field ID MW-7 Lab Samp ID 6864-6W <br /> Descr/Location MW-7 Recd Date 04/16/2004 <br /> Sample Date 04/14/2004 Prep Date 04/21/2004 <br />' Sample Time 1240 Analysis Date 04/21/2004 <br /> Matrix Water QC Batch VWMS-4214 <br /> Basis Not Filtered Notes <br />' Analyte Det Limit Rep Limit Note Result Units Pvc Dil <br /> Methyl-tent-butyl ether(MTBE) 0 289 05 MRL 57 UG/L 1 <br /> Ethyl tert-butyl ether(ETRE) 0 084 05 MRL ND UG/t- 1 <br /> ttert-Amyl methyl ether(TAME) 0 067 05 MRL ND UG/L 1 <br /> Di-isopropyl ether(DIPE) 0155 05 MRL 23 UG/L 1 <br /> tert-Butyl alcohol (TBA) 879 20 MRL ND UG/L 1 <br />' 1,2-Dichloroethane 0 081 05 MRL G50 UG/L 1 <br /> 1,2-Dibromoethane 1 0 092 05 MRL ND UG/L 1 <br /> SURROGATE AND INTERNAL STANDARD RECOVERIES <br /> Toluene-d8 76-129 SLSA 128% 1 <br /> 1,2-Dichloroethane-d4 53-141 SLSA 948% 1 <br /> 1 <br /> Approved by f " Date 23 <br />