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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-31617-1 <br /> Matrix Spike/ Method: 8260B/CA_LUFTMS <br /> Matrix Spike Duplicate Recovery Report-Batch: 720-81384 Preparation: 5030B <br /> MS Lab Sample ID: 720-31617-1 Analysis Batch: 720-81384 Instrument ID: HP4 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 110810027.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 11/08/2010 2230 Final Weight/Volume: 10 mL <br /> Date Prepared: 11/08/2010 2230 <br /> MSD Lab Sample ID: 720-31617-1 Analysis Batch: 720-81384 Instrument ID: HP4 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 110810028.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 11/08/2010 2302 Final Weight/Volume: 10 mL <br /> Date Prepared: 11/08/2010 2302 <br /> %Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> EDB 106 111 60-140 5 20 <br /> 1,2,4-Trichlorobenzene 91 93 60-140 2 20 <br /> Surrogate MS% Rec MSD%Rec Acceptance Limits <br /> Toluene-d8(Surr) 106 110 70-130 <br /> 4-Bromofluoro benzene 101 105 67-130 <br /> 1,2-Dichloroethane-d4(Surr) 111 117 67-130 <br /> TestAmerica San Francisco Page 28 of 36 <br />