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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-31291-1 <br /> Matrix Spike/ Method: 8260B/CA_LUFTMS <br /> Matrix Spike Duplicate Recovery Report-Batch: 720-80786 Preparation: 5030B <br /> MS Lab Sample ID: 720-31291-4 Analysis Batch: 720-80786 Instrument ID: HP12 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 10281025.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 10/28/2010 2056 Final Weight/Volume: 10 mL <br /> Date Prepared: 10/28/2010 2056 <br /> MSD Lab Sample ID: 720-31291-4 Analysis Batch: 720-80786 Instrument ID: HP12 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 10281026.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 10/28/2010 2127 Final Weight/Volume: 10 mL <br /> Date Prepared: 10/28/2010 2127 <br /> %Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> EDB 134 135 60-140 1 20 <br /> 1,2,4-Trichlorobenzene 112 114 60-140 2 20 <br /> Surrogate MS% Rec MSD%Rec Acceptance Limits <br /> Toluene-d8(Surr) 108 108 70-130 <br /> 4-Bromofluoro benzene 99 100 67-130 <br /> 1,2-Dichloroethane-d4(Surr) 103 100 67-130 <br /> TestAmerica San Francisco Page 29 of 31 <br />