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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: 720-17632 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-17632/2 Analysis Batch: 720-17632 Instrument ID: Saturn 3900B <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: c:\saturnws\data\200701\0' <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 01/26/2007 0913 Final Weight/Volume: 40 mL <br /> Date Prepared: 01/26/2007 0913 <br /> LCSD Lab Sample ID:LCSD 720-17632/1 Analysis Batch: 720-17632 Instrument ID: Saturn 3900B <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: c:\saturnws\data\200701\01,' <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 01/26/2007 0940 Final Weight/Volume: 40 mL <br /> Date Prepared: 01/26/2007 0940 <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Benzene 93 100 69- 129 7 25 <br /> MTBE 102 93 65- 165 9 25 <br /> Toluene 94 94 70- 130 0 25 <br /> Surrogate_ LCS%Rec LCSD%Rec Acceptance Limits <br /> Toluene-d8(Surr) 106 105 77- 121 <br /> 1,2-Dichloroethane-d4(Surr) 127 109 73- 130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 44 of 63 <br />