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Quality Control Results <br /> Client: Shaw Environmental & Infrastructure, Inc Job Number: 720-21697-1 <br /> Matrix Spike/ Method: 8260B <br /> Matrix Spike Duplicate Recovery Report- Batch: 720-55128 Preparation: 5030B <br /> MS Lab Sample ID: 720-21697-14 Analysis Batch: 720-55128 Instrument ID: Agilent 5973 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 08050912.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 08/05/2009 1651 Final Weight/Volume: 10 mL <br /> Date Prepared: 08/05/2009 1651 <br /> MSD Lab Sample ID: 720-21697-14 Analysis Batch: 720-55128 Instrument ID: Agilent 5973 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 08050913.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 08/05/2009 1722 Final Weight/Volume: 10 mL <br /> Date Prepared: 08/05/2009 1722 <br /> %Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> Dichlorodifluoromethane 93 97 38-140 4 20 <br /> 1,1-Dichloroethane 107 109 60- 140 1 20 <br /> 1,2-Dichloroethane 117 110 60-140 5 20 <br /> 1,1-Dichloroethene 100 103 60- 140 3 20 <br /> cis-1,2-Dichloroethene 118 119 60-140 1 20 <br /> trans-1,2-Dichloroethene 97 98 60- 140 1 20 <br /> 1,2-Dichloropropane 110 110 60-140 0 20 <br /> cis-1,3-Dichloropropene 113 110 60- 140 3 20 <br /> trans-1,3-Dichloropropene 109 105 60- 140 4 20 <br /> Ethylbenzene 103 105 60-140 2 20 <br /> Hexachlorobutadiene 89 92 60-140 4 20 <br /> 2-Hexanone 136 113 60-140 18 20 <br /> Isopropylbenzene 94 96 60-140 2 20 <br /> 4-Isopropyltoluene 99 102 60- 140 3 20 <br /> Methylene Chloride 90 89 40-140 1 20 <br /> 4-Methyl-2-pentanone(MIBK) 132 111 60- 140 17 20 <br /> Naphthalene 91 86 56- 140 6 20 <br /> N-Propylbenzene 96 102 60-140 5 20 <br /> Styrene 93 74 60- 140 24 20 F <br /> 1,1,1,2-Tetrachloroethane 113 114 60-140 1 20 <br /> 1,1,2,2-Tetrachloroethane 111 101 60-140 10 20 <br /> Tetrachloroethene -55 -41 60-140 0 20 4 4 <br /> Toluene 101 103 60-140 2 20 <br /> 1,2,3-Trichlorobenzene 98 92 60-140 7 20 <br /> 1,2,4-Trichlorobenzene 95 93 60-140 3 20 <br /> 1,1,1-Trichloroethane 100 104 60-140 4 20 <br /> 1,1,2-Trichloroethane 110 100 60-140 10 20 <br /> Trichloroethene 98 101 60-140 2 20 <br /> Trichlorofluoromethane 84 86 60- 140 2 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 39 of 63 08/17/2009 <br />