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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: 720-55354 Preparation: 5030B <br /> MS Lab Sample ID: 720-21697-1 Analysis Batch: 720-55355 Instrument ID: Chenstation 3 <br /> Client Matrix: Solid Prep Batch: 720-55354 Lab File ID: 08060911.D <br /> Dilution: 1.0 Initial Weight[Volume: 5.01 g <br /> Date Analyzed: 08/06/2009 1515 Final Weight/Volume: 10 mL <br /> Date Prepared: 08/06/2009 0718 <br /> MSD Lab Sample ID: 720-21697-1 Analysis Batch: 720-55355 Instrument ID: Chenstation 3 <br /> Client Matrix: Solid Prep Batch: 720-55354 Lab File ID: 08060912.D <br /> Dilution: 1.0 Initial Weight/Volume: 4.99 g <br /> Date Analyzed: 08/06/2009 1547 Final Weight/Volume: 10 mL <br /> Date Prepared: 08/06/2009 0718 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qua] <br /> Dichlorodifluoromethane 83 89 70-130 8 20 <br /> 1,1-Dichloroethane 96 103 70-130 7 20 <br /> 1,2-Dichloroethane 94 105 70-130 12 20 <br /> 1,1-Dichloroethene 104 110 70- 130 7 20 <br /> cis-1,2-Dichloroethene 97 104 70- 130 8 20 <br /> trans-l,2-Dichloroethene 97 103 70-130 6 20 <br /> 1,2-Dichloropropane 96 103 70- 130 8 20 <br /> cis-1,3-Dichloropropene 106 117 70- 130 10 20 <br /> trans-1,3-Dichloropropene 101 114 70- 130 13 20 <br /> Ethylbenzene 101 107 70- 130 6 20 <br /> Hexachlorobutadiene 98 99 70- 130 2 20 <br /> 2-Hexanone 101 129 70- 130 25 20 F <br /> Isop ropylbenzene 88 93 70- 130 6 20 <br /> 4-Isopropy]to]uene 100 103 70-130 4 20 <br /> Methylene Chloride 92 100 70-130 8 20 <br /> 4-Methyl-2-pentanone(MIBK) 98 125 70- 130 24 20 F <br /> Naphthalene 94 109 70- 130 15 20 <br /> N-Propylbenzene 96 102 70- 130 7 20 <br /> Styrene 103 109 70- 130 7 20 <br /> 1,1,1,2-Tetrachloroethane 114 123 70- 130 8 20 <br /> 1,1,2,2-Tetrachloroethane 94 114 70- 130 20 20 <br /> Tetrachloroethene 98 107 70- 130 8 20 <br /> Toluene 94 101 70- 130 7 20 <br /> 1,2,3-Trichlorobenzene 96 105 70- 130 8 20 <br /> 1,2,4-Trichlorobenzene 94 99 70- 130 5 20 <br /> 1,1,1-Trichloroethane 102 111 70-130 9 20 <br /> 1,1,2-Trichloroethane 98 112 70-130 14 20 <br /> Trichloroethene 97 106 70-130 9 20 <br /> Trichlorofluoromethane 99 106 70-130 7 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 55 of 63 08/17/2009 <br />