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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: 720-49995 Preparation: 5030B <br /> MS Lab Sample ID: 720-19558-38 Analysis Batch: 720-49995 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\050809\s� <br /> Dilution: 20 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/08/2009 1150 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/08/2009 1150 <br /> MSD Lab Sample ID: 720-19558-38 Analysis Batch: 720-49995 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\050809\sa- <br /> Dilution: 20 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/08/2009 1224 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/08/2009 1224 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1-Dichloroethene 105 105 70- 130 0 20 <br /> 1,1-Dichloroethane 105 103 70- 130 2 20 <br /> Dichlorodifluoromethane 101 104 70- 130 3 20 <br /> Vinyl chloride 110 104 70- 130 5 20 <br /> Chloroethane 105 97 70- 130 7 20 <br /> Trichlorofluoromethane 105 108 70- 130 3 20 <br /> Methylene Chloride 92 95 70- 130 3 20 <br /> trans-1,2-Dichloroethene 105 104 70- 130 1 20 <br /> cis-1,2-Dichloroethene 105 110 70- 130 4 20 <br /> Chloroform 100 105 70- 130 5 20 <br /> 1,1,1-Trichloroethane 108 102 70- 130 5 20 <br /> Carbon tetrachloride 105 102 70- 130 4 20 <br /> 1,2-Dichloroethane 94 105 70- 130 11 20 <br /> Trichloroethene 107 89 70- 130 6 20 <br /> 1,2-Dichloropropane 108 110 70- 130 2 20 <br /> Dichlorobromomethane 102 104 70- 130 2 20 <br /> trans-1,3-Dichloropropene 93 109 70- 130 16 20 <br /> cis-1,3-Dichloropropene 97 102 70- 130 5 20 <br /> 1,1,2-Trichloroethane 94 106 70- 130 11 20 <br /> Tetrachloroethene 100 98 70- 130 2 20 <br /> Chlorodibromomethane 94 104 70- 130 10 20 <br /> Chlorobenzene 107 104 70- 130 3 20 <br /> Bromoform 102 117 70- 130 13 20 <br /> 1,1,2,2-Tetrachloroethane 101 114 70- 130 12 20 <br /> 1,3-Dichlorobenzene 103 105 70- 130 2 20 <br /> 1,4-Dichlorobenzene 98 102 70- 130 3 20 <br /> 1,2-Dichlorobenzene 108 112 70- 130 4 20 <br /> Chloromethane 98 92 70- 130 6 20 <br /> Bromomethane 103 97 70- 130 6 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 135 of 155 <br />