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Quality Control Results <br /> Client: SECOR International, Inc. Job Number: 720-7408-1 <br /> Lab Control Spike/ Method: 8260B <br /> Lab Control Spike Duplicate Recovery Report- Batch: 720-17673 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-17673/2 Analysis Batch: 720-17673 Instrument ID: Saturn 2100 <br /> Client Matrix: Solid Prep Batch: N/A Lab File ID: c:\saturnws\data\200701\0' <br /> Dilution: 1.0 Units: mg/Kg Initial Weight/Volume: 5 g <br /> Date Analyzed: 01/25/2007 1516 Final Weight/Volume: 10 mL <br /> Date Prepared: 01/25/2007 1516 <br /> LCSD Lab Sample ID:LCSD 720-17673/1 Analysis Batch: 720-17673 Instrument ID: Saturn 2100 <br /> Client Matrix: Solid Prep Batch: N/A Lab File ID: c:\saturnws\data\200701\01� <br /> Dilution: 1.0 Units: mg/Kg Initial Weight/Volume: 5 g <br /> Date Analyzed: 01/25/2007 1543 Final Weight/Volume: 10 mL <br /> Date Prepared: 01/25/2007 1543 <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Benzene 105 101 69-129 3 20 <br /> MTBE 105 111 65- 165 6 20 <br /> Toluene 110 102 70- 130 8 20 <br /> Surrogate LCS%Rec LCSD%Rec Acceptance Limits <br /> Toluene-d8(Surr) 94 91 70- 130 <br /> 1,2-Dichloroethane-d4(Surr) 88 89 60- 140 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 52 of 63 <br />