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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: 720-55224 Preparation: 5030B <br /> MS Lab Sample ID: 720-21697-13 Analysis Batch: 720-55224 Instrument ID: Chenstation 3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 08050924.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 08/05/2009 2041 Final Weight/Volume: 10 mL <br /> Date Prepared: 08/05/2009 2041 <br /> MSD Lab Sample ID: 720-21697-13 Analysis Batch: 720-55224 Instrument ID: Chenstation 3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 08050925.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 08/05/2009 2113 Final Weight/Volume: 10 mL <br /> Date Prepared: 08/05/2009 2113 <br /> %Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> Methyl tert-butyl ether 100 100 60- 138 0 20 <br /> Acetone 98 98 60-140 0 20 <br /> Benzene 96 98 60-140 2 20 <br /> Dichlorobromomethane 115 113 60-140 1 20 <br /> Bromobenzene 100 101 60- 140 1 20 <br /> Chlorobromomethane 102 103 60- 140 1 20 <br /> Bromoform 96 97 56- 140 1 20 <br /> Bromomethane 92 92 23- 140 0 20 <br /> 2-Butanone(MEK) 99 105 60- 140 5 20 <br /> n-Butylbenzene 102 106 60- 140 4 20 <br /> sec-Butylbenzene 99 102 60- 140 3 20 <br /> tert-Butylbenzene 100 102 60-140 2 20 <br /> Carbon disulfide 93 95 38-140 3 20 <br /> Carbon tetrachloride 113 115 60-140 2 20 <br /> Chlorobenzene 101 103 60-140 2 20 <br /> Chloroethane 102 102 51 -140 0 20 <br /> Chloroform 100 101 60- 140 1 20 <br /> Chloromethane 88 90 52- 140 2 20 <br /> 2-Chlorotoluene 99 101 60- 140 2 20 <br /> 4-Chlorotoluene 99 101 60- 140 2 20 <br /> Chlorodibromomethane 104 103 60- 140 0 20 <br /> 1,2-Dichlorobenzene 99 101 60- 140 3 20 <br /> 1,3-Dichlorobenzene 101 103 60-140 2 20 <br /> 1,4-Dichlorobenzene 97 101 60-140 3 20 <br /> 1,3-Dichloropropane 106 107 60-140 1 20 <br /> 1,1-Dichloropropene 100 102 60-140 2 20 <br /> 1,2-Dibromo-3-Chloropropane 104 108 60- 140 4 20 <br /> Ethylene Dibromide 109 110 60-140 1 20 <br /> Dibromomethane 105 104 60-140 1 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 46 of 63 08/17/2009 <br />