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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: 720-63441 Preparation: 5030B <br /> MS Lab Sample ID: 720-24769-A-18 MS Analysis Batch: 720-63441 Instrument ID: ChemStation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12230931.D <br /> Dilution: 100 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/24/2009 0102 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/24/2009 0102 <br /> MSD Lab Sample ID: 720-24769-A-18 MSD Analysis Batch: 720-63441 Instrument ID: ChemStation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12230932.D <br /> Dilution: 100 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/24/2009 0133 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/24/2009 0133 <br /> %Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1-Dichloroethene 100 101 60-140 1 20 <br /> 1,1-Dichloroethane 105 108 60-140 2 20 <br /> Dichlorodifluoromethane 99 99 38-140 0 20 <br /> Vinyl chloride 100 101 58-140 0 20 <br /> Chloroethane 99 99 51 -140 0 20 <br /> Trichlorofluoromethane 109 107 60-140 2 20 <br /> Methylene Chloride 115 118 40-140 2 20 <br /> trans-1,2-Dichloroethene 90 98 60-140 7 20 <br /> cis-1,2-Dichloroethene 106 145 60-140 15 20 F <br /> Chloroform 109 111 60-140 2 20 <br /> 1,1,1-Trichloroethane 108 109 60-140 0 20 <br /> Carbon tetrachloride 110 110 60-140 0 20 <br /> 1,2-Dichloroethane 106 110 60-140 4 20 <br /> Trichloroethene 49 97 60-140 9 20 4 4 <br /> 1,2-Dichloropropane 107 112 60-140 5 20 <br /> Dichlorobromomethane 117 122 60-140 4 20 <br /> trans-1,3-Dichloropropene 99 101 60-140 1 20 <br /> cis-1,3-Dichloropropene 104 108 60-140 4 20 <br /> 1,1,2-Trichloroethane 110 117 60-140 6 20 <br /> Tetrachloroethene 108 108 60-140 1 20 <br /> Chlorodibromomethane 114 118 60-140 3 20 <br /> Chlorobenzene 101 103 60-140 2 20 <br /> Bromoform 105 109 56-140 4 20 <br /> 1,1,2,2-Tetrachloroethane 96 104 60-140 8 20 <br /> 1,3-Dichlorobenzene 105 110 60-140 5 20 <br /> 1,4-Dichlorobenzene 100 102 60-140 2 20 <br /> 1,2-Dichlorobenzene 104 108 60-140 4 20 <br /> Chloromethane 95 99 52-140 4 20 <br /> Bromomethane 102 102 23-140 0 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 17 Of 40 <br />