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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: 720-17513 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-17513/2 Analysis Batch: 720-17513 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: 01/23/2007 1102 Final Weight/Volume: 40 mL <br /> Date Prepared: 01/23/2007 1102 <br /> LCSD Lab Sample ID:LCSD 720-17513/1 Analysis Batch: 720-17513 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: 01/23/2007 1329 Final Weight/Volume: 40 mL <br /> Date Prepared: 01/23/2007 1329 <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Benzene 102 105 69-129 4 25 <br /> MTBE 99 108 65- 165 9 25 <br /> Toluene 104 102 70- 130 2 25 <br /> Surrogate LCS % Rec LCSD% Rec Acceptance Limits <br /> Toluene-d8(Surr) 113 114 77-121 <br /> 1,2-Dichloroethane-d4(Surr) 111 116 73- 130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 38 of 63 <br />