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Quality Control Results <br /> Client: ARCADIS Job Number: 720-26676-1 <br /> Lab Control Sample/ Method: 8260B <br /> Lab Control Sample Duplicate Recovery Report- Batch: 720-68279 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-68279/5 Analysis Batch: 720-68279 Instrument ID: HP4 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 03241023.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 03/24/2010 2007 Final Weight/Volume: 10 mL <br /> Date Prepared: 03/24/2010 2007 <br /> LCSD Lab Sample ID: LCSD 720-68279/6 Analysis Batch: 720-68279 Instrument ID: HP4 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 03241024.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 03/24/2010 2039 Final Weight/Volume: 10 mL <br /> Date Prepared: 03/24/2010 2039 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Methyl tert-butyl ether 97 100 81 -125 3 20 <br /> Acetone 72 73 61 -140 0 20 <br /> Benzene 94 96 82-127 1 20 <br /> Dichlorobromomethane 113 116 70-130 2 20 <br /> Bromobenzene 100 102 88-125 2 20 <br /> Chlorobromomethane 100 101 70-130 1 20 <br /> Bromoform 97 100 68-136 2 20 <br /> Bromomethane 96 96 43-151 1 20 <br /> 2-Butanone(MEK) 91 96 70-130 5 20 <br /> n-Butylbenzene 121 120 70-130 1 20 <br /> sec-Butyl benzene 108 110 70-130 2 20 <br /> tert-Butyl benzene 106 110 70-130 3 20 <br /> Carbon disulfide 95 97 79-133 1 20 <br /> Carbon tetrachloride 119 119 77-146 0 20 <br /> Chlorobenzene 95 97 70-130 2 20 <br /> Chloroethane 94 96 73-150 2 20 <br /> Chloroform 101 101 70-130 1 20 <br /> Chloromethane 85 85 52-175 0 20 <br /> 2-Chlorotoluene 103 106 70-130 3 20 <br /> 4-Chlorotoluene 103 106 70-130 2 20 <br /> Chlorodibromomethane 104 105 78-145 1 20 <br /> 1,2-Dichlorobenzene 100 101 70-130 2 20 <br /> 1,3-Dichlorobenzene 100 102 70-130 2 20 <br /> 1,4-Dichlorobenzene 99 101 87-120 2 20 <br /> 1,3-Dichloropropane 102 105 86-135 3 20 <br /> 1,1-Dichloropropene 108 110 70-130 1 20 <br /> 1,2-Dibromo-3-Chloropropane 87 91 61 -116 4 20 <br /> Ethylene Dibromide 105 108 70-130 3 20 <br /> Dibromomethane 101 103 70-130 1 20 <br /> Dichlorodifluoromethane 82 82 42-188 0 20 <br /> 1,1-Dichloroethane 98 99 70-130 1 20 <br /> 1,2-Dichloroethane 102 102 75-145 0 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 108 Of 130 <br />