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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-29164-1 <br /> Matrix Spike/ Method: 8260B/CA_LUFTMS <br /> Matrix Spike Duplicate Recovery Report-Batch: 720-74289 Preparation: 5030B <br /> MS Lab Sample ID: 720-29177-A-2 MS Analysis Batch: 720-74289 Instrument ID: CHMSV2 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 07081040.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 07/09/2010 0515 Final Weight/Volume: 10 mL <br /> Date Prepared: 07/09/2010 0515 <br /> MSD Lab Sample ID: 720-29177-A-2 MSD Analysis Batch: 720-74289 Instrument ID: CHMSV2 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 07081041.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 07/09/2010 0548 Final Weight/Volume: 10 mL <br /> Date Prepared: 07/09/2010 0548 <br /> %Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> EDB 108 108 60-140 0 20 <br /> 1,2,4-Trichlorobenzene 90 92 60-140 2 20 <br /> Surrogate MS%Rec MSD%Rec Acceptance Limits <br /> Toluene-d8(Surr) 97 96 70-130 <br /> 4-Bromofluoro benzene 98 97 67-130 <br /> 1,2-Dichloroethane-d4(Surr) 99 98 67-130 <br /> TestAmerica San Francisco Page 25 of 27 07/21/2010 <br />