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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 Qual <br /> Methyl tert-butyl ether 89 106 70-130 18 20 <br /> Acetone 102 128 70-130 23 20 F <br /> Benzene 92 98 70-130 7 20 <br /> Dichlorobromomethane 106 117 70-130 10 20 <br /> Bromobenzene 95 102 70- 130 8 20 <br /> Chlorobromomethane 93 102 70- 130 10 20 <br /> Bromoform 98 114 70- 130 16 20 <br /> Bromomethane 93 100 70- 130 8 20 <br /> 2-Butanone(MEK) 92 120 70- 130 27 20 F <br /> n-Butylbenzene 107 110 70- 130 3 20 <br /> sec-Butylbenzene 101 106 70- 130 5 20 <br /> tert-Butylbenzene 99 103 70- 130 5 20 <br /> Carbon disulfide 95 101 70- 130 7 20 <br /> Carbon tetrachloride 114 124 70-130 9 20 <br /> Chlorobenzene 97 103 70-130 7 20 <br /> Chloroethane 101 106 70-130 5 20 <br /> Chloroform 94 101 70-130 7 20 <br /> Chloromethane 91 101 70-130 10 20 <br /> 2-Chlorotoluene 98 103 70- 130 5 20 <br /> 4-Chlorotoluene 98 103 70- 130 5 20 <br /> Chlorodibromomethane 96 108 70- 130 12 20 <br /> 1,2-Dichlorobenzene 95 102 70-130 8 20 <br /> 1,3-Dichlorobenzene 99 104 70-130 5 20 <br /> 1,4-Dichlorobenzene 97 102 70-130 5 20 <br /> 1,3-Dichloropropane 96 108 70-130 13 20 <br /> 1,1-Dichloropropene 101 108 70-130 7 20 <br /> 1,2-Dibromo-3-Chloropropane 102 126 70-130 21 20 F <br /> Ethylene Dibromide 101 117 70-130 16 20 <br /> Dibromomethane 96 110 70-130 14 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 54 of 63 08/17/2009 <br />