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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-24805-1 <br /> Matrix Spike/ Method: 8260B/CA_LUFTMS <br /> Matrix Spike Duplicate Recovery Report-Batch: 720-63445 Preparation: 5030B <br /> MS Lab Sample ID: 720-24796-A-2 MS Analysis Batch: 720-63445 Instrument ID: Chemtation 3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12230929.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/23/2009 2331 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/23/2009 2331 <br /> MSD Lab Sample ID: 720-24796-A-2 MSD Analysis Batch: 720-63445 Instrument ID: Chemtation 3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12230930.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/24/2009 0004 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/24/2009 0004 <br /> %Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1-Dichloroethene 113 113 60-140 0 20 <br /> 1,1-Dichloroethane 114 115 60-140 1 20 <br /> Dichlorodifluoromethane 135 147 38-140 8 20 F <br /> Vinyl chloride 129 135 58-140 5 20 <br /> Chloroethane 129 131 51 -140 1 20 <br /> Trichlorofluoromethane 98 99 60-140 0 20 <br /> Methylene Chloride 110 112 40-140 2 20 <br /> trans-1,2-Dichloroethene 100 101 60-140 0 20 <br /> cis-1,2-Dichloroethene 123 124 60-140 1 20 <br /> Chloroform 111 112 60-140 1 20 <br /> 1,1,1-Trichloroethane 112 115 60-140 2 20 <br /> Carbon tetrachloride 111 113 60-140 2 20 <br /> 1,2-Dichloroethane 113 114 60-140 1 20 <br /> Trichloroethene 109 111 60-140 2 20 <br /> 1,2-Dichloropropane 116 115 60-140 2 20 <br /> Dichlorobromomethane 121 123 60-140 2 20 <br /> trans-1,3-Dichloropropene 120 119 60-140 1 20 <br /> cis-1,3-Dichloropropene 123 123 60-140 0 20 <br /> 1,1,2-Trichloroethane 116 115 60-140 1 20 <br /> Tetrachloroethene 112 111 60-140 1 20 <br /> Chlorodibromomethane 122 121 60-140 0 20 <br /> Chlorobenzene 109 110 60-140 1 20 <br /> Bromoform 93 93 56-140 0 20 <br /> 1,1,2,2-Tetrachloroethane 109 110 60-140 1 20 <br /> 1,3-Dichlorobenzene 106 109 60-140 3 20 <br /> 1,4-Dichlorobenzene 105 105 60-140 0 20 <br /> 1,2-Dichlorobenzene 107 109 60-140 1 20 <br /> Chloromethane 111 114 52-140 2 20 <br /> Bromomethane 119 120 23-140 1 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 22 Of 40 <br />