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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-19656-1 <br /> Matrix Spike/ Method: 8260B <br /> Matrix Spike Duplicate Recovery Report- Batch: 720-50794 Preparation: 5030B <br /> MS Lab Sample ID: 720-19977-B-5 MS Analysis Batch: 720-50794 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\052109\S, <br /> Dilution: 4.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/22/2009 0154 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/22/2009 0154 <br /> MSD Lab Sample ID: 720-19977-B-5 MSD Analysis Batch: 720-50794 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\052109\SA <br /> Dilution: 4.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/22/2009 0228 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/22/2009 0228 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1-Dichloroethene 96 102 70- 130 6 20 <br /> Trichloroethene 85 81 70- 130 4 20 <br /> Chlorobenzene 105 106 70- 130 1 20 <br /> Surrogate MS% Rec MSD % Rec Acceptance Limits <br /> Toluene-d8(Surr) 94 97 70- 130 <br /> 4-Bromofluorobenzene 94 100 67- 130 <br /> 1,2-Dichloroethane-d4(Surr) 97 105 67- 130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 56 of 74 <br />