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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 /> 1,1-Dichloroethene 99 104 64-129 5 20 <br /> cis-1,2-Dichloroethene 110 112 68-131 2 20 <br /> trans-1,2-Dichloroethene 98 101 70-130 3 20 <br /> 1,2-Dichloropropane 107 108 65-133 1 20 <br /> cis-1,3-Dichloropropene 98 98 46-139 0 20 <br /> trans-1,3-Dichloropropene 92 91 55-131 1 20 <br /> Ethylbenzene 111 117 65-130 5 20 <br /> Hexachlorobutadiene 102 105 58-132 3 20 <br /> 2-Hexanone 109 103 44-158 6 20 <br /> Isopropylbenzene 80 83 70-130 4 20 <br /> 4-Isopropyltoluene 100 103 69-134 3 20 <br /> Methylene Chloride 99 99 63-129 0 20 <br /> 4-Methyl-2-pentanone(MIBK) 108 106 51 -140 2 20 <br /> Naphthalene 93 100 45-146 6 20 <br /> N-Propylbenzene 95 100 71 -130 5 20 <br /> Styrene 92 95 58-135 3 20 <br /> 1,1,1,2-Tetrachloroethane 104 106 64-133 2 20 <br /> 1,1-,2,2-Tetrachloroethane 111 110 75-131 1 20 <br /> Tetrachloroethene 100 103 67-128 3 20 <br /> Toluene 104 107 72-120 3 20 <br /> 1,2,3-Trichlorobenzene 91 94 58-138 3 20 <br /> 1,2,4-Trichlorobenzene 87 90 49-144 4 20 <br /> 1,1,1-Trichloroethane 101 104 57-133 4 20 <br /> 1,1,2-Trichloroethane 114 116 68-132 2 20 <br /> Trichloroethene 103 106 66-125 3 20 <br /> Trichlorofluoromethane 95 96 61 -127 1 20 <br /> 1,2,3-Trichloropropane 111 111 62-156 0 20 <br /> 1,1,2-Trichloro-1,2,24rifluoroethane 100 100 52-126 0 20 <br /> 1,2,4-Trimethylbenzene 99 103 64-140 4 20 <br /> 1,3,5-Trimethylbenzene 95 100 67-134 5 20 <br /> Vinyl acetate 78 80 52-170 3 20 <br /> Vinyl chloride 92 95 62-120 3 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 20 of 25 <br />