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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-20559-1 <br /> Matrix Spike/ Method: 8260B <br /> Matrix Spike Duplicate Recovery Report-Batch: 720-52615 Preparation: 5030B <br /> MS Lab Sample ID: 720-20559-1 Analysis Batch: 720-52615 Instrument ID: Chemstation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 06210907.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 06/21/2009 1147 Final Weight/Volume: 10 mL <br /> Date Prepared: 06/21/2009 1147 <br /> MSD Lab Sample ID: 720-20559-1 Analysis Batch: 720-52615 Instrument ID: Chemstation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 06210908.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 06/21/2009 1218 Final Weight/Volume: 10 mL <br /> Date Prepared: 06/21/2009 1218 <br /> %Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1-Dichloroethene 90 90 70-130 0 20 <br /> 1,1-Dichloroethane 90 90 70-130 0 20 <br /> Dichlorodifluoromethane 93 93 70-130 0 20 <br /> Vinyl chloride 111 113 70-130 2 20 <br /> Chloroethane 97 96 70-130 1 20 <br /> Trichlorofluoromethane 96 97 70-130 1 20 <br /> Methylene Chloride 88 87 70-130 1 20 <br /> trans-1,2-Dichloroethene 86 86 70-130 0 20 <br /> cis-1,2-Dichloroethene 96 95 70-130 1 20 <br /> Chloroform 95 94 70-130 1 20 <br /> 1,1,1-Trichloroethane 86 87 70-130 2 20 <br /> Carbon tetrachloride 87 89 70-130 2 20 <br /> 1,2-Dichloroethane 97 94 70-130 3 20 <br /> Trichloroethene 95 92 70-130 3 20 <br /> 1,2-Dichloropropane 95 94 70-130 1 20 <br /> Dichlorobromomethane 101 98 70-130 3 20 <br /> trans-1,3-Dichloropropene 98 95 70-130 3 20 <br /> cis-1,3-Dichloropropene 100 98 70-130 2 20 <br /> 1,1,2-Trichloroethane 111 104 70-130 6 20 <br /> Tetrachloroethene 92 92 70-130 0 20 <br /> Chlorodibromomethane 100 96 70-130 4 20 <br /> Chlorobenzene 104 104 70-130 1 20 <br /> Bromoform 76 72 70-130 5 20 <br /> 1,1,2,2-Tetrachloroethane 122 113 70-130 7 20 <br /> 1,3-Dichlorobenzene 109 108 70-130 0 20 <br /> 1,4-Dichlorobenzene 106 106 70-130 1 20 <br /> 1,2-Dichlorobenzene 109 106 70-130 2 20 <br /> Chloromethane 88 90 70-130 2 20 <br /> Bromomethane 105 104 70-130 1 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 21 Of 31 <br />