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Quality Control Results <br /> Client: ARCADIS U.S., Inc. Job Number: 720-24241-1 <br /> Lab Control Sample/ Method: 8260B <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-61926 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-61926/4 Analysis Batch: 720-61926 Instrument ID: Agilent 75MSD <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 11230927.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 11/23/2009 2157 Final Weight/Volume: 10 mL <br /> Date Prepared: 11/23/2009 2157 <br /> LCSD Lab Sample ID: LCSD 720-61926/5 Analysis Batch: 720-61926 Instrument ID: Agilent 75MSD <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 11230928.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 11/23/2009 2229 Final Weight/Volume: 10 mL <br /> Date Prepared: 11/23/2009 2229 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 103 105 70-130 1 20 <br /> cis-1,2-Dichloroethene 114 113 80-136 0 20 <br /> trans-1,2-Dichloroethene 101 101 80-125 0 20 <br /> 1,2-Dichloropropane 112 109 75-138 2 20 <br /> cis-1,3-Dichloropropene 109 109 72-148 0 20 <br /> trans-1,3-Dichloropropene 101 98 74-137 3 20 <br /> Ethylbenzene 111 111 80-139 0 20 <br /> Hexachlorobutadiene 106 108 75-138 1 20 <br /> 2-Hexanone 111 105 60-140 5 20 <br /> Isopropyl benzene 102 103 63-114 1 20 <br /> 4-Isopropyltoluene 101 103 73-148 1 20 <br /> Methylene Chloride 99 98 71 -127 1 20 <br /> 4-Methyl-2-pentanone(MIBK) 120 114 40-168 5 20 <br /> Naphthalene 127 124 56-156 3 20 <br /> N-Propylbenzene 116 116 78-144 0 20 <br /> Styrene 107 107 73-146 0 20 <br /> 1,1,1,2-Tetrachloroethane 115 114 80-128 1 20 <br /> 1,1,2,2-Tetrachloroethane 132 126 72-146 5 20 <br /> Tetrachloroethene 96 97 80-134 1 20 <br /> Toluene 106 105 80-126 1 20 <br /> 1,2,3-Trichlorobenzene 118 118 66-153 0 20 <br /> 1,2,4-Trichlorobenzene 104 103 70-143 1 20 <br /> 1,1,1-Trichloroethane 105 106 74-135 0 20 <br /> 1,1,2-Trichloroethane 119 115 67-151 4 20 <br /> Trichloroethene 106 106 72-138 1 20 <br /> Trichlorofluoromethane 91 93 62-136 2 20 <br /> 1,2,3-Trichloropropane 126 122 76-142 3 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 102 103 66-132 1 20 <br /> 1,2,4-Trimethylbenzene 123 123 74-151 0 20 <br /> 1,3,5-Trimethylbenzene 119 119 75-144 0 20 <br /> Vinyl acetate 104 101 40-173 3 20 <br /> Vinyl chloride 101 103 58-147 2 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 43 of 52 <br />