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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-19558-1 <br /> Lab Control Sample/ Method: 8260B <br /> Lab Control Sample Duplicate Recovery Report- Batch: 720-50035 Preparation: 5030B <br /> LCS Lab Sample ID:LCS 720-50035/2 Analysis Batch: 720-50035 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\051109\LS. <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/11/2009 1207 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/11/2009 1207 <br /> LCSD Lab Sample ID:LCSD 720-50035/1 Analysis Batch: 720-50035 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\051109\LD4 <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/11/2009 1240 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/11/2009 1240 <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Surrogate LCS% Rec LCSD % Rec Acceptance Limits <br /> Toluene-d8(Surr) 102 105 82- 120 <br /> 4-Bromofluorobenzene 103 113 74- 131 <br /> 1,2-Dichloroethane-d4(Surr) 101 96 72- 125 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 139 of 155 <br />