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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: 720-50713 Preparation: 5030B <br /> LCS Lab Sample ID:LCS 720-50713/11 Analysis Batch: 720-50713 Instrument ID: Chemstation 3.0 on 95PC <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 05200933.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 05/21/2009 0002 Final Weight/Volume: 10 mL <br /> Date Prepared: 05/21/2009 0002 <br /> LCSD Lab Sample ID:LCSD 720-50713/12 Analysis Batch: 720-50713 Instrument ID: Chemstation 3.0 on 95PC <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 05200934.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 05/21/2009 0033 Final Weight/Volume: 10 mL <br /> Date Prepared: 05/21/2009 0033 <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) 98 97 70- 130 <br /> 4-Bromofluorobenzene 101 100 67- 130 <br /> 1,2-Dichloroethane-d4(Surr) 101 101 67- 130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 148 of 155 <br />