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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-30642-1 <br /> Method Blank-Batch: 720-78443 Method: 8260B <br /> Preparation: 5030B <br /> Lab Sample ID: MB 720-78443/4 Analysis Batch: 720-78443 Instrument ID: HP12 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09221005.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/22/2010 1023 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/22/2010 1023 <br /> Analyte Result Qual RL <br /> Trichloroethene ND 0.50 <br /> Surrogate % Rec Acceptance Limits <br /> Toluene-d8(Surr) 99 70-130 <br /> 4-Bromofluoro benzene 102 67-130 <br /> 1,2-Dichloroethane-d4(Surr) 99 67-130 <br /> Lab Control Sample/ Method: 8260B <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-78443 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-78443/5 Analysis Batch: 720-78443 Instrument ID: HP12 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09221006.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/22/2010 1053 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/22/2010 1053 <br /> LCSD Lab Sample ID: LCSD 720-78443/6 Analysis Batch: 720-78443 Instrument ID: HP12 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09221007.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/22/2010 1123 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/22/2010 1123 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Trichloroethene 107 105 70-130 2 20 <br /> Surrogate LCS%Rec LCSD%Rec Acceptance Limits <br /> Toluene-d8(Surr) 101 100 70-130 <br /> 4-Bromofluorobenzene 101 102 67-130 <br /> 1,2-Dichloroethane-d4(Surr) 100 95 67-130 <br /> TestAmerica San Francisco Page 16 of 18 <br />