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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: 720-52803 Preparation: 5030B <br /> MS Lab Sample ID: 720-20627-A-2 MS Analysis Batch: 720-52803 Instrument ID: Chemstation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 06220918.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 06/22/2009 1420 Final Weight/Volume: 10 mL <br /> Date Prepared: 06/22/2009 1420 <br /> MSD Lab Sample ID: 720-20627-A-2 MSD Analysis Batch: 720-52803 Instrument ID: Chemstation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 06220919.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 06/22/2009 1451 Final Weight/Volume: 10 mL <br /> Date Prepared: 06/22/2009 1451 <br /> %Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1-Dichloroethene 90 91 60-140 2 20 <br /> 1,1-Dichloroethane 91 93 60-140 2 20 <br /> Dichlorodifluoromethane 93 93 38-140 0 20 <br /> Vinyl chloride 116 116 58-140 0 20 <br /> Chloroethane 101 103 51 -140 2 20 <br /> Trichlorofluoromethane 95 99 60-140 3 20 <br /> Methylene Chloride 87 89 40-140 2 20 <br /> trans-1,2-Dichloroethene 86 88 60-140 1 20 <br /> cis-1,2-Dichloroethene 98 99 60-140 1 20 <br /> Chloroform 97 98 60-140 1 20 <br /> 1,1,1-Trichloroethane 87 88 60-140 2 20 <br /> Carbon tetrachloride 89 91 60-140 1 20 <br /> 1,2-Dichloroethane 98 101 60-140 3 20 <br /> Trichloroethene 93 92 60-140 1 20 <br /> 1,2-Dichloropropane 98 99 60-140 1 20 <br /> Dichlorobromomethane 105 108 60-140 3 20 <br /> trans-1,3-Dichloropropene 101 103 60-140 2 20 <br /> cis-1,3-Dichloropropene 103 106 60-140 3 20 <br /> 1,1,2-Trichloroethane 111 115 60-140 4 20 <br /> Tetrachloroethene 93 92 60-140 2 20 <br /> Chlorodibromomethane 105 109 60-140 4 20 <br /> Chlorobenzene 108 107 60-140 1 20 <br /> Bromoform 80 85 56-140 6 20 <br /> 1,1,2,2-Tetrachloroethane 122 134 60-140 9 20 <br /> 1,3-Dichlorobenzene 112 112 60-140 0 20 <br /> 1,4-Dichlorobenzene 111 108 60-140 2 20 <br /> 1,2-Dichlorobenzene 113 114 60-140 1 20 <br /> Chloromethane 87 90 52-140 4 20 <br /> Bromomethane 110 111 23-140 1 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 26 Of 31 <br />