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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-Dichloroethene 115 118 70- 130 2 20 <br /> 1,1-Dichloroethane 110 112 70- 130 2 20 <br /> Dichlorodifluoromethane 107 101 70- 130 5 20 <br /> Vinyl chloride 89 91 70- 130 1 20 <br /> Chloroethane 102 99 70- 130 4 20 <br /> Trichlorofluoromethane 120 115 70- 130 4 20 <br /> Methylene Chloride 95 99 70- 130 4 20 <br /> trans-1,2-Dichloroethene 113 109 70- 130 3 20 <br /> cis-1,2-Dichloroethene 119 105 70- 130 4 20 <br /> Chloroform 109 107 70- 130 2 20 <br /> 1,1,1-Trichloroethane 112 115 70- 130 3 20 <br /> Carbon tetrachloride 116 112 70- 130 3 20 <br /> 1,2-Dichloroethane 103 107 70- 130 4 20 <br /> Trichloroethene 112 98 70- 130 7 20 <br /> 1,2-Dichloropropane 106 112 70- 130 6 20 <br /> Dichlorobromomethane 107 106 70- 130 0 20 <br /> trans-1,3-Dichloropropene 103 103 70- 130 0 20 <br /> cis-1,3-Dichloropropene 108 109 70- 130 1 20 <br /> 1,1,2-Trichloroethane 97 121 70- 130 22 20 <br /> Tetrachloroethene 116 113 70- 130 2 20 <br /> Chlorodibromomethane 102 106 70- 130 4 20 <br /> Chlorobenzene 112 108 70- 130 3 20 <br /> Bromoform 115 117 70- 130 2 20 <br /> 1,1,2,2-Tetrachloroethane 109 107 70- 130 2 20 <br /> 1,3-Dichlorobenzene 109 111 70- 130 2 20 <br /> 1,4-Dichlorobenzene 110 103 70- 130 7 20 <br /> 1,2-Dichlorobenzene 113 110 70- 130 2 20 <br /> Chloromethane 99 104 70- 130 5 20 <br /> Bromomethane 103 103 70- 130 0 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 130 of 155 <br />