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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-24805-1 <br /> Matrix Spike/ Method: 8260B/CA_LUFTMS <br /> Matrix Spike Duplicate Recovery Report-Batch: 720-63558 Preparation: 5030B <br /> MS Lab Sample ID: 720-24822-B-5 MS Analysis Batch: 720-63558 Instrument ID: Chemtation 3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12290918.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/29/2009 1824 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/29/2009 1824 <br /> MSD Lab Sample ID: 720-24822-B-5 MSD Analysis Batch: 720-63558 Instrument ID: Chemtation 3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12290919.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/29/2009 1858 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/29/2009 1858 <br /> %Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 129 98 60-140 28 20 F <br /> EDB 125 100 60-140 22 20 F <br /> 1,2,4-Trichlorobenzene 113 89 60-140 24 20 F <br /> Surrogate MS%Rec MSD%Rec Acceptance Limits <br /> Toluene-d8(Surr) 102 102 70-130 <br /> 4-Bromofluoro benzene 108 106 67-130 <br /> 1,2-Dichloroethane-d4(Surr) 101 102 67-130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 38 of 40 <br />