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ao� laboratories <br /> Ground Zero Analysis <br /> 1714 Main Street <br /> Escalon, CA 95320 Blank I QC Data Date Analyzed: 03104104 <br /> Proj, ID: 186 Method: EPA 8260E <br /> Site:Knowles Rock <br /> Matrix:Water <br /> Lab ID: BLKE0304 Method Rep.Lim. <br /> Sample ID: Blank Water Soil <br /> Units: ug1L ugll mglKg <br /> t-Butanol(TBA) <20 20 0.050 <br /> Methyl-t-Butyl Ether(MTBE) <2.0 2.0 0.005 <br /> Di-Isopropyl Ether(DIPE) <2.0 2.0 0.005 <br /> Ethyl-t-Butyl Ether(ETRE) <2.0 2.0 0.005 <br /> t-Amyl Methyl Ether(TAME) <2.0 2.0 0.005 <br /> 1,2-Dichloroethane(1,2-DCA) <2.0 2.0 0.005 <br /> 1,2-Dibromoethane(EDB) <2.0 2.0 0.005 <br /> QA/QC: <br /> Surrogate Spike Recovery: 108% <br /> Matrix Spike Recovery Summary <br /> Percent Recovery <br /> Lab ID Client ID Analyte MS 1 MSD %RPD <br /> E02581 KR MW-1 ETBE 103 1 117 13 <br /> E02594 KR MW-15C TAME 117 1109 7 <br /> Laboratory Control Spike Recovery Summary <br /> Lab ID Analyte Percent Recovery <br /> LCS0304E 1,2-DCA 112 <br /> Note(s): <br /> Water samples are reported in ug/L:soil/sludge samples in mg/Kg;productloil/non-aqueous liquid samples in mglL. <br /> ND means not detected at or above the stated reporting limit;NIA means analyte not applicable to this analysis. <br /> 3037 Fifth 5t., Ceres, CA 95307 • Phone: (209)581-9280 • Fax: (209)581-9282 <br />