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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: 720-49979 Preparation: 5030B <br /> MS Lab Sample ID: 720-19563-A-3 MS Analysis Batch: 720-49979 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\050909\s� <br /> Dilution: 2.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/09/2009 1223 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/09/2009 1223 <br /> MSD Lab Sample ID: 720-19563-A-3 MSD Analysis Batch: 720-49979 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\050909\sa- <br /> Dilution: 2.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/09/2009 1257 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/09/2009 1257 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1-Dichloroethene 115 113 70- 130 2 20 <br /> 1,1-Dichloroethane 107 107 70- 130 0 20 <br /> Dichlorodifluoromethane 98 98 70- 130 0 20 <br /> Vinyl chloride 101 97 70- 130 4 20 <br /> Chloroethane 101 99 70- 130 2 20 <br /> Trichlorofluoromethane 114 114 70- 130 0 20 <br /> Methylene Chloride 98 101 70- 130 2 20 <br /> trans-1,2-Dichloroethene 110 112 70- 130 3 20 <br /> cis-1,2-Dichloroethene 115 119 70- 130 4 20 <br /> Chloroform 108 110 70- 130 1 20 <br /> 1,1,1-Trichloroethane 117 113 70- 130 4 20 <br /> Carbon tetrachloride 119 114 70- 130 5 20 <br /> 1,2-Dichloroethane 105 114 70- 130 8 20 <br /> Trichloroethene 110 109 70- 130 1 20 <br /> 1,2-Dichloropropane 104 113 70- 130 8 20 <br /> Dichlorobromomethane 108 115 70- 130 7 20 <br /> trans-1,3-Dichloropropene 99 114 70- 130 14 20 <br /> cis-1,3-Dichloropropene 106 112 70- 130 6 20 <br /> 1,1,2-Trichloroethane 105 130 70- 130 21 20 <br /> Tetrachloroethene 133 129 70- 130 1 20 F <br /> Chlorodibromomethane 97 115 70- 130 17 20 <br /> Chlorobenzene 108 113 70- 130 4 20 <br /> Bromoform 107 124 70- 130 15 20 <br /> 1,1,2,2-Tetrachloroethane 107 127 70- 130 17 20 <br /> 1,3-Dichlorobenzene 110 117 70- 130 6 20 <br /> 1,4-Dichlorobenzene 106 114 70- 130 7 20 <br /> 1,2-Dichlorobenzene 110 121 70- 130 10 20 <br /> Chloromethane 94 98 70- 130 4 20 <br /> Bromomethane 100 101 70- 130 1 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 121 of 155 <br />