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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: 720-50211 Preparation: 5030B <br /> MS Lab Sample ID: 720-19558-29 Analysis Batch: 720-50211 Instrument ID: Chemstation 3.0 on 95PC <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 05070931.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 05/07/2009 2326 Final Weight/Volume: 10 mL <br /> Date Prepared: 05/07/2009 2326 <br /> MSD Lab Sample ID: 720-19558-29 Analysis Batch: 720-50211 Instrument ID: Chemstation 3.0 on 95PC <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 05070932.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 05/07/2009 2358 Final Weight/Volume: 10 mL <br /> Date Prepared: 05/07/2009 2358 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1-Dichloroethene 99 97 70- 130 1 20 <br /> 1,1-Dichloroethane 107 106 70- 130 1 20 <br /> Dichlorodifluoromethane 80 81 70- 130 1 20 <br /> Vinyl chloride 100 106 70- 130 5 20 <br /> Chloroethane 86 94 70- 130 9 20 <br /> Trichlorofluoromethane 103 101 70- 130 2 20 <br /> Methylene Chloride 99 97 70- 130 2 20 <br /> trans-1,2-Dichloroethene 101 98 70- 130 2 20 <br /> cis-1,2-Dichloroethene 113 108 70- 130 4 20 <br /> Chloroform 114 113 70- 130 2 20 <br /> 1,1,1-Trichloroethane 115 112 70- 130 3 20 <br /> Carbon tetrachloride 117 115 70- 130 2 20 <br /> 1,2-Dichloroethane 119 117 70- 130 2 20 <br /> Trichloroethene 113 113 70- 130 0 20 <br /> 1,2-Dichloropropane 113 110 70- 130 3 20 <br /> Dichlorobromomethane 122 123 70- 130 1 20 <br /> trans-1,3-Dichloropropene 122 120 70- 130 2 20 <br /> cis-1,3-Dichloropropene 121 116 70- 130 4 20 <br /> 1,1,2-Trichloroethane 117 115 70- 130 2 20 <br /> Tetrachloroethene 106 106 70- 130 0 20 <br /> Chlorodibromomethane 123 121 70- 130 2 20 <br /> Chlorobenzene 104 101 70- 130 3 20 <br /> Bromoform 117 105 70- 130 10 20 <br /> 1,1,2,2-Tetrachloroethane 109 101 70- 130 8 20 <br /> 1,3-Dichlorobenzene 104 103 70- 130 1 20 <br /> 1,4-Dichlorobenzene 99 98 70- 130 0 20 <br /> 1,2-Dichlorobenzene 105 102 70- 130 2 20 <br /> Chloromethane 84 94 70- 130 11 20 <br /> Bromomethane 86 91 70- 130 6 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 144 of 155 <br />