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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-19656-1 <br /> Lab Control Sample - Batch: 720-50110 Method: 8260B <br /> Preparation: 5030B <br /> Lab Sample ID: LCS 720-50110/4 Analysis Batch: 720-50110 Instrument ID: Chemstation 3.0 on 95PC <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 05110905.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 05/11/2009 0907 Final Weight/Volume: 10 mL <br /> Date Prepared: 05/11/2009 0907 <br /> Analyte Spike Amount Result % Rec. Limit Qual <br /> 1,1-Dichloroethene 10.0 9.61 96 70- 130 <br /> Trichloroethene 10.0 11.2 112 70- 130 <br /> Chlorobenzene 10.0 10.9 109 70- 130 <br /> Surrogate % Rec Acceptance Limits <br /> Toluene-d8(Surr) 102 82- 120 <br /> 4-Bromofluorobenzene 106 67- 133 <br /> 1,2-Dichloroethane-d4(Surr) 101 72- 125 <br /> Matrix Spike/ Method: 8260B <br /> Matrix Spike Duplicate Recovery Report- Batch: 720-50110 Preparation: 5030B <br /> MS Lab Sample ID: 720-19656-2 Analysis Batch: 720-50110 Instrument ID: Chemstation 3.0 on 95PC <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 05110910.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 05/11/2009 1146 Final Weight/Volume: 10 mL <br /> Date Prepared: 05/11/2009 1146 <br /> MSD Lab Sample ID: 720-19656-2 Analysis Batch: 720-50110 Instrument ID: Chemstation 3.0 on 95PC <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 05110911.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 05/11/2009 1218 Final Weight/Volume: 10 mL <br /> Date Prepared: 05/11/2009 1218 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1-Dichloroethene 85 89 70- 130 4 20 <br /> Trichloroethene 84 90 70- 130 2 20 <br /> Chlorobenzene 98 103 70- 130 5 20 <br /> Surrogate MS% Rec MSD % Rec Acceptance Limits <br /> Toluene-d8(Surr) 102 104 82- 120 <br /> 4-Bromofluorobenzene 105 102 67- 133 <br /> 1,2-Dichloroethane-d4(Surr) 103 101 72- 125 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 53 of 74 <br />