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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-19040-1 <br /> Lab Control Sample/ Method: 8260B <br /> Lab Control Sample Duplicate Recovery Report- Batch: 720-49017 Preparation: 5030B <br /> LCS Lab Sample ID:LCS 720-49017/3 Analysis Batch: 720-49017 Instrument ID: Saturn 2K3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: d:\data\200904\042209\LS. <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 04/22/2009 0938 Final Weight/Volume: 40 mL <br /> Date Prepared: 04/22/2009 0938 <br /> LCSD Lab Sample ID:LCSD 720-49017/2 Analysis Batch: 720-49017 Instrument ID: Saturn 2K3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: d:\data\200904\042209\LD4 <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 04/22/2009 1010 Final Weight/Volume: 40 mL <br /> Date Prepared: 04/22/2009 1010 <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 92 91 70- 130 1 20 <br /> Trichloroethene 92 90 70- 130 2 20 <br /> Chlorobenzene 107 108 70- 130 1 20 <br /> Surrogate LCS% Rec LCSD % Rec Acceptance Limits <br /> Toluene-d8(Surr) 96 101 82- 120 <br /> 4-Bromofluorobenzene 97 100 74- 131 <br /> 1,2-Dichloroethane-d4 (Surr) 88 91 72- 125 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 63 of 69 <br />