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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: 720-63558 Preparation: 5030B <br /> MS Lab Sample ID: 720-24822-B-5 MS Analysis Batch: 720-63558 Instrument ID: Chemtation 3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12290918.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/29/2009 1824 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/29/2009 1824 <br /> MSD Lab Sample ID: 720-24822-B-5 MSD Analysis Batch: 720-63558 Instrument ID: Chemtation 3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12290919.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/29/2009 1858 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/29/2009 1858 <br /> %Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1-Dichloroethene 122 95 60-140 25 20 F <br /> 1,1-Dichloroethane 127 100 60-140 24 20 F <br /> Dichlorodifluoromethane 98 78 38-140 23 20 F <br /> Vinyl chloride 120 92 58-140 26 20 F <br /> Chloroethane 140 104 51 -140 30 20 F <br /> Trichlorofluoromethane 115 86 60-140 28 20 F <br /> Methylene Chloride 109 83 40-140 27 20 F <br /> trans-1,2-Dichloroethene 113 87 60-140 25 20 F <br /> cis-1,2-Dichloroethene 138 107 60-140 25 20 F <br /> Chloroform 127 98 60-140 26 20 F <br /> 1,1,1-Trichloroethane 130 98 60-140 28 20 F <br /> Carbon tetrachloride 130 100 60-140 26 20 F <br /> 1,2-Dichloroethane 123 98 60-140 23 20 F <br /> Trichloroethene 127 99 60-140 25 20 F <br /> 1,2-Dichloropropane 119 96 60-140 22 20 F <br /> Dichlorobromomethane 130 105 60-140 22 20 F <br /> trans-1,3-Dichloropropene 125 100 60-140 23 20 F <br /> cis-1,3-Dichloropropene 130 102 60-140 24 20 F <br /> 1,1,2-Trichloroethane 122 97 60-140 23 20 F <br /> Tetrachloroethene 128 97 60-140 28 20 F <br /> Chlorodibromomethane 125 99 60-140 22 20 F <br /> Chlorobenzene 122 95 60-140 25 20 F <br /> Bromoform 101 82 56-140 22 20 F <br /> 1,1,2,2-Tetrachloroethane 110 88 60-140 21 20 F <br /> 1,3-Dichlorobenzene 118 91 60-140 25 20 F <br /> 1,4-Dichlorobenzene 107 82 60-140 27 20 F <br /> 1,2-Dichlorobenzene 117 92 60-140 24 20 F <br /> Chloromethane 102 83 52-140 21 20 F <br /> Bromomethane 141 106 23-140 29 20 F F <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 37 of 40 <br />