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Quality Control Results <br /> Client: ARCADIS Job Number: 720-26716-1 <br /> Lab Control Sample/ Method: 8260B <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-68453 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-68453/4 Analysis Batch: 720-68453 Instrument ID: HP12 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 03271005.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 03/27/2010 1122 Final Weight/Volume: 10 mL <br /> Date Prepared: 03/27/2010 1122 <br /> LCSD Lab Sample ID: LCSD 720-68453/5 Analysis Batch: 720-68453 Instrument ID: HP12 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 03271006.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 03/27/2010 1153 Final Weight/Volume: 10 mL <br /> Date Prepared: 03/27/2010 1153 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 94 95 64-128 0 20 <br /> cis-1,2-Dichloroethene 101 102 70-130 2 20 <br /> trans-1,2-Dichloroethene 91 93 82-114 2 20 <br /> 1,2-Dichloropropane 91 93 70-130 3 20 <br /> cis-1,3-Dichloropropene 107 109 70-130 2 20 <br /> trans-1,3-Dichloropropene 107 110 70-130 3 20 <br /> Ethylbenzene 94 95 86-135 1 20 <br /> Hexachlorobutadiene 94 99 70-130 5 20 <br /> 2-Hexanone 101 104 60-164 2 20 <br /> Isopropyl benzene 83 83 70-130 1 20 <br /> 4-Isopropyltoluene 95 97 70-130 2 20 <br /> Methylene Chloride 88 90 73-147 3 20 <br /> 4-Methyl-2-pentanone(MIBK) 97 100 63-165 3 20 <br /> Naphthalene 101 103 78-122 1 20 <br /> N-Propylbenzene 90 90 70-130 1 20 <br /> Styrene 105 105 70-130 0 20 <br /> 1,1,1,2-Tetrachloroethane 108 110 70-130 2 20 <br /> 1,1,2,2-Tetrachloroethane 89 90 70-130 1 20 <br /> Tetrachloroethene 97 99 70-130 2 20 <br /> Toluene 100 100 83-129 0 20 <br /> 1,2,3-Trichlorobenzene 96 97 70-130 1 20 <br /> 1,2,4-Trichlorobenzene 95 96 70-130 1 20 <br /> 1,1,1-Trichloroethane 100 105 70-130 4 20 <br /> 1,1,2-Trichloroethane 96 98 86-135 2 20 <br /> Trichloroethene 97 99 70-130 2 20 <br /> Trichlorofluoromethane 96 95 70-130 1 20 <br /> 1,2,3-Trichloropropane 98 100 84-121 2 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 98 101 42-162 2 20 <br /> 1,2,4-Trimethylbenzene 100 101 70-132 1 20 <br /> 1,3,5-Trimethylbenzene 99 101 70-130 2 20 <br /> Vinyl acetate 103 103 58-145 1 20 <br /> Vinyl chloride 85 85 65-156 0 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 59 of 68 <br />