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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-19558-1 <br /> Matrix Spike/ Method: 8260B <br /> Matrix Spike Duplicate Recovery Report- Batch: 720-49994 Preparation: 5030B <br /> MS Lab Sample ID: 720-19558-8 Analysis Batch: 720-49994 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\050809\s� <br /> Dilution: 4.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/08/2009 2126 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/08/2009 2126 <br /> MSD Lab Sample ID: 720-19558-8 Analysis Batch: 720-49994 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\050809\sa- <br /> Dilution: 4.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/08/2009 2159 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/08/2009 2159 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 117 119 70- 130 1 20 <br /> EDB 99 101 70- 130 2 20 <br /> 1,2,4-Trichlorobenzene 105 103 70- 130 3 20 <br /> Surrogate MS% Rec MSD % Rec Acceptance Limits <br /> Toluene-d8(Surr) 110 100 82- 120 <br /> 4-Bromofluorobenzene 110 100 74- 131 <br /> 1,2-Dichloroethane-d4(Surr) 102 100 72- 125 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 131 of 155 <br />