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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: 720-49896 Preparation: 5030B <br /> MS Lab Sample ID: 720-19425-B-20 MS Analysis Batch: 720-49896 Instrument ID: Chemstation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 05070921.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 05/07/2009 2215 Final Weight/Volume: 10 mL <br /> Date Prepared: 05/07/2009 2215 <br /> MSD Lab Sample ID: 720-19425-B-20 MSD Analysis Batch: 720-49896 Instrument ID: Chemstation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 05070922.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 05/07/2009 2246 Final Weight/Volume: 10 mL <br /> Date Prepared: 05/07/2009 2246 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1-Dichloroethene 90 92 70- 130 1 20 <br /> 1,1-Dichloroethane 100 102 70- 130 2 20 <br /> Dichlorodifluoromethane 90 88 70- 130 2 20 <br /> Vinyl chloride 123 115 70- 130 7 20 <br /> Chloroethane 111 114 70- 130 3 20 <br /> Trichlorofluoromethane 94 94 70- 130 0 20 <br /> Methylene Chloride 98 100 70- 130 2 20 <br /> trans-1,2-Dichloroethene 93 95 70- 130 1 20 <br /> cis-1,2-Dichloroethene 103 104 70- 130 2 20 <br /> Chloroform 103 105 70- 130 2 20 <br /> 1,1,1-Trichloroethane 101 102 70- 130 1 20 <br /> Carbon tetrachloride 101 100 70- 130 1 20 <br /> 1,2-Dichloroethane 103 107 70- 130 4 20 <br /> Trichloroethene 96 96 70- 130 1 20 <br /> 1,2-Dichloropropane 104 107 70- 130 2 20 <br /> Dichlorobromomethane 113 116 70- 130 2 20 <br /> trans-1,3-Dichloropropene 104 110 70- 130 6 20 <br /> cis-1,3-Dichloropropene 103 106 70- 130 3 20 <br /> 1,1,2-Trichloroethane 107 113 70- 130 5 20 <br /> Tetrachloroethene 95 94 70- 130 1 20 <br /> Chlorodibromomethane 93 96 70- 130 3 20 <br /> Chlorobenzene 101 102 70- 130 1 20 <br /> Bromoform 88 93 70- 130 5 20 <br /> 1,1,2,2-Tetrachloroethane 112 118 70- 130 5 20 <br /> 1,3-Dichlorobenzene 107 108 70- 130 1 20 <br /> 1,4-Dichlorobenzene 99 102 70- 130 3 20 <br /> 1,2-Dichlorobenzene 105 106 70- 130 2 20 <br /> Chloromethane 102 105 70- 130 3 20 <br /> Bromomethane 112 114 70- 130 2 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 96 of 155 <br />