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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 /> Methyl tert-butyl ether 99 91 60- 138 9 20 <br /> Acetone 112 91 60- 140 17 20 <br /> Benzene 99 101 60-140 1 20 <br /> Dichlorobromomethane 114 112 60-140 2 20 <br /> Bromobenzene 96 99 60-140 3 20 <br /> Chlorobromomethane 95 91 60-140 4 20 <br /> Bromoform 88 83 56-140 6 20 <br /> Bromomethane 110 116 23-140 5 20 <br /> 2-Butanone(MEK) 109 91 60-140 18 20 <br /> n-Butylbenzene 106 110 60-140 3 20 <br /> sec-Butylbenzene 105 111 60-140 5 20 <br /> tert-Butylbenzene 95 102 60-140 7 20 <br /> Carbon disulfide 91 94 38-140 3 20 <br /> Carbon tetrachloride 102 105 60-140 2 20 <br /> Chlorobenzene 97 98 60-140 1 20 <br /> Chloroethane 124 129 51 -140 4 20 <br /> Chloroform 102 102 60-140 0 20 <br /> Chloromethane 107 114 52-140 7 20 <br /> 2-Chlorotoluene 102 107 60-140 5 20 <br /> 4-Chlorotoluene 103 106 60-140 4 20 <br /> Chlorodibromomethane 92 88 60-140 4 20 <br /> 1,2-Dichlorobenzene 105 105 60-140 0 20 <br /> 1,3-Dichlorobenzene 101 103 60-140 2 20 <br /> 1,4-Dichlorobenzene 99 101 60-140 2 20 <br /> 1,3-Dichloropropane 106 100 60-140 6 20 <br /> 1,1-Dichloropropene 103 105 60-140 2 20 <br /> 1,2-Dibromo-3-Chloropropane 79 70 60-140 12 20 <br /> Ethylene Dibromide 111 100 60-140 10 20 <br /> Dibromomethane 103 97 60-140 6 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 38 of 63 08/17/2009 <br />