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Quality Control Results <br /> Client: ARCADIS U.S., Inc. Job Number: 720-24241-1 <br /> Matrix Spike/ Method: 8260B <br /> Matrix Spike Duplicate Recovery Report-Batch: 720-61926 Preparation: 5030B <br /> MS Lab Sample ID: 720-24241-3 Analysis Batch: 720-61926 Instrument ID: Agilent 75MSD <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 11230935.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 11/24/2009 0215 Final Weight/Volume: 10 mL <br /> Date Prepared: 11/24/2009 0215 <br /> MSD Lab Sample ID: 720-24241-3 Analysis Batch: 720-61926 Instrument ID: Agilent 75MSD <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 11230936.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 11/24/2009 0248 Final Weight/Volume: 10 mL <br /> Date Prepared: 11/24/2009 0248 <br /> %Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> Dichlorodifluoromethane 79 77 38-140 3 20 <br /> 1,1-Dichloroethane 109 109 60-140 0 20 <br /> 1,2-Dichloroethane 112 112 60-140 0 20 <br /> 1,1-Dichloroethene 101 99 60-140 1 20 <br /> cis-1,2-Dichloroethene 114 114 60-140 1 20 <br /> trans-1,2-Dichloroethene 99 99 60-140 0 20 <br /> 1,2-Dichloropropane 112 112 60-140 0 20 <br /> cis-1,3-Dichloropropene 107 107 60-140 1 20 <br /> trans-1,3-Dichloropropene 99 98 60-140 1 20 <br /> Ethylbenzene 110 109 60-140 1 20 <br /> Hexachlorobutadiene 105 102 60-140 3 20 <br /> 2-Hexanone 98 100 60-140 2 20 <br /> Isopropyl benzene 100 100 60-140 0 20 <br /> 4-Isopropyltoluene 99 98 60-140 0 20 <br /> Methylene Chloride 91 94 40-140 2 20 <br /> 4-Methyl-2-pentanone(MIBK) 109 110 60-140 1 20 <br /> Naphthalene 114 115 56-140 1 20 <br /> N-Propylbenzene 111 113 60-140 2 20 <br /> Styrene 103 99 60-140 4 20 <br /> 1,1,1,2-Tetrachloroethane 115 116 60-140 1 20 <br /> 1,1,2,2-Tetrachloroethane 121 127 60-140 5 20 <br /> Tetrachloroethene 94 93 60-140 2 20 <br /> Toluene 101 102 60-140 1 20 <br /> 1,2,3-Trichlorobenzene 115 114 60-140 1 20 <br /> 1,2,4-Trichlorobenzene 101 101 60-140 0 20 <br /> 1,1,1-Trichloroethane 105 104 60-140 1 20 <br /> 1,1,2-Trichloroethane 116 117 60-140 1 20 <br /> Trichloroethene 105 103 60-140 2 20 <br /> Trichlorofluoromethane 91 91 60-140 0 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 46 of 52 <br />