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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 /> Methyl tert-butyl ether 97 101 81 -125 5 20 <br /> Acetone 100 100 61 -140 0 20 <br /> Benzene 89 90 82-127 0 20 <br /> Dichlorobromomethane 110 113 70-130 2 20 <br /> Bromobenzene 93 95 88-125 3 20 <br /> Chlorobromomethane 96 101 70-130 4 20 <br /> Bromoform 95 97 68-136 3 20 <br /> Bromomethane 95 97 43-151 3 20 <br /> 2-Butanone(MEK) 89 91 70-130 2 20 <br /> n-Butylbenzene 95 96 70-130 1 20 <br /> sec-Butyl benzene 92 94 70-130 2 20 <br /> tert-Butyl benzene 98 100 70-130 2 20 <br /> Carbon disulfide 91 91 79-133 0 20 <br /> Carbon tetrachloride 107 111 77-146 4 20 <br /> Chlorobenzene 90 91 70-130 1 20 <br /> Chloroethane 95 97 73-150 2 20 <br /> Chloroform 95 98 70-130 3 20 <br /> Chloromethane 88 90 52-175 3 20 <br /> 2-Chlorotoluene 96 97 70-130 1 20 <br /> 4-Chlorotoluene 92 92 70-130 0 20 <br /> Chlorodibromomethane 111 115 78-145 3 20 <br /> 1,2-Dichlorobenzene 94 95 70-130 2 20 <br /> 1,3-Dichlorobenzene 95 96 70-130 1 20 <br /> 1,4-Dichlorobenzene 92 93 87-120 1 20 <br /> 1,3-Dichloropropane 92 95 86-135 3 20 <br /> 1,1-Dichloropropene 99 101 70-130 2 20 <br /> 1,2-Dibromo-3-Chloropropane 105 108 61 -116 3 20 <br /> Ethylene Dibromide 103 104 70-130 1 20 <br /> Dibromomethane 97 100 70-130 4 20 <br /> Dichlorodifluoromethane 69 69 42-188 0 20 <br /> 1,1-Dichloroethane 91 93 70-130 2 20 <br /> 1,2-Dichloroethane 93 97 75-145 4 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 58 of 68 <br />