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Quality Control Results <br /> Client: Shaw Environmental&Infrastructure, Inc Job Number: 720-21697-2 <br /> Lab Control Sample/ Method:8260B <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-55861 Preparation:5030B <br /> LCS Lab Sample ID: LCS 720-55861/2-A Analysis Batch: 720-55862 Instrument ID: Chemtation 3 <br /> Client Matrix: Solid Prep Batch: 720-55861 Lab File ID: 08170904.D <br /> Dilution: 1.0 Units: ug/Kg Initial Weight/Volume: 5 g <br /> Date Analyzed: 08/17/2009 0857 Final Weight/Volume: 10 mL <br /> Date Prepared: 08/17/2009 0800 <br /> LCSD Lab Sample ID: LCSD 720-55861/3-A Analysis Batch: 720-55862 Instrument ID: Chemtation 3 <br /> Client Matrix: Solid Prep Batch: 720-55861 Lab File ID: 08170905.D <br /> Dilution: 1.0 Units: ug/Kg Initial Weight/Volume: 5 g <br /> Date Analyzed: 08/17/2009 0928 Final Weight/Volume: 10 mL <br /> Date Prepared: 08/17/2009 0800 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> �.. _. .M ..._. <br /> . <br /> Methyl tert-butyl ether 92 94 69-125 2 20 <br /> Acetone 117 121 37-171 3 20 <br /> Benzene 107 109 72-120 2 20 <br /> Dichlorobromomethane 111 112 64-135 1 20 <br /> Bromobenzene 103 106 77-121 3 20 <br /> Chlorobromomethane 103 103 65-128 0 20 <br /> Bromoform 94 92 58-132 2 20 <br /> Bromomethane 98 99 56-124 1 20 <br /> 2-Butanone(MEK) 119 112 41 -158 6 20 <br /> n-Butylbenzene 102 107 60-145 5 20 <br /> sec-Butyl benzene 99 104 64-137 5 20 <br /> tert-Butylbenzene 96 102 63-134 5 20 <br /> Carbon disulfide 104 101 10-175 2 20 <br /> Carbon tetrachloride 104 107 54-141 3 20 <br /> Chlorobenzene 101 105 70-121 3 20 <br /> Chloroethane 98 100 61 -125 2 20 <br /> Chloroform 103 105 67-125 1 20 <br /> Chloromethane 88 90 50-131 2 20 <br /> 2-Chlorotoluene 112 117 75-131 5 20 <br /> 4-Chlorotoluene 112 117 76-129 5 20 <br /> Chlorodibromomethane 110 110 60-140 0 20 <br /> 1,2-Dichlorobenzene 106 109 73-126 3 20 <br /> 1,3-Dichlorobenzene 111 115 73-128 3 20 <br /> 1,4-Dichlorobenzene 98 102 72-122 3 20 <br /> 1,3-Dichloropropane 116 112 74-127 3 20 <br /> 1,1-Dichloropropene 106 111 67-128 4 20 <br /> 1,2-Dibromo-3-Chloropropane 106 105 57-130 1 20 <br /> Ethylene Dibromide 111 108 66-135 2 20 <br /> Dibromomethane 105 104 65-131 1 20 <br /> Dichlorodifluoromethane 78 78 38-120 0 20 <br /> 1,1-Dichloroethane 104 107 67-126 3 20 <br /> 1,2-Dichloroethane 105 106 73-122 0 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 19 of 25 <br />