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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: 720-49980 Preparation: 5030B <br /> MS Lab Sample ID: 720-19554-A-6 MS Analysis Batch: 720-49980 Instrument ID: Chemstation 3.0 on 95PC <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 05090911.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 05/09/2009 1324 Final Weight/Volume: 10 mL <br /> Date Prepared: 05/09/2009 1324 <br /> MSD Lab Sample ID: 720-19554-A-6 MSD Analysis Batch: 720-49980 Instrument ID: Chemstation 3.0 on 95PC <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 05090912.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 05/09/2009 1355 Final Weight/Volume: 10 mL <br /> Date Prepared: 05/09/2009 1355 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1-Dichloroethene 88 86 70- 130 2 20 <br /> 1,1-Dichloroethane 106 104 70- 130 2 20 <br /> Dichlorodifluoromethane 87 81 70- 130 8 20 <br /> Vinyl chloride 96 94 70- 130 2 20 <br /> Chloroethane 102 105 70- 130 3 20 <br /> Trichlorofluoromethane 103 98 70- 130 5 20 <br /> Methylene Chloride 93 95 70- 130 1 20 <br /> trans-1,2-Dichloroethene 94 93 70- 130 1 20 <br /> cis-1,2-Dichloroethene 103 103 70- 130 1 20 <br /> Chloroform 110 107 70- 130 3 20 <br /> 1,1,1-Trichloroethane 107 105 70- 130 2 20 <br /> Carbon tetrachloride 113 108 70- 130 4 20 <br /> 1,2-Dichloroethane 111 110 70- 130 0 20 <br /> Trichloroethene 110 108 70- 130 2 20 <br /> 1,2-Dichloropropane 112 114 70- 130 2 20 <br /> Dichlorobromomethane 119 118 70- 130 0 20 <br /> trans-1,3-Dichloropropene 112 116 70- 130 4 20 <br /> cis-1,3-Dichloropropene 120 121 70- 130 1 20 <br /> 1,1,2-Trichloroethane 113 114 70- 130 1 20 <br /> Tetrachloroethene 109 104 70- 130 5 20 <br /> Chlorodibromomethane 113 114 70- 130 1 20 <br /> Chlorobenzene 107 105 70- 130 1 20 <br /> Bromoform 89 93 70- 130 4 20 <br /> 1,1,2,2-Tetrachloroethane 96 99 70- 130 3 20 <br /> 1,3-Dichlorobenzene 109 106 70- 130 3 20 <br /> 1,4-Dichlorobenzene 102 99 70- 130 3 20 <br /> 1,2-Dichlorobenzene 103 106 70- 130 2 20 <br /> Chloromethane 91 90 70- 130 1 20 <br /> Bromomethane 95 101 70- 130 6 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 125 of 155 <br />