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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-30603-1 <br /> Method Blank-Batch: 720-78346 Method: 82608/CA_LUFTMS <br /> Preparation: 5030B <br /> Lab Sample ID: MB 720-78346/4 Analysis Batch: 720-78346 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09211004.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/21/2010 1001 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/21/2010 1001 <br /> Analyte Result Qual RL <br /> Trichloroethene ND 0.50 <br /> Tetrachloroethene ND 0.50 <br /> Surrogate % Rec Acceptance Limits <br /> Toluene-d8(Surr) 93 70-130 <br /> 4-Bromofluoro benzene 93 67-130 <br /> 1,2-Dichloroethane-d4(Surr) 94 67-130 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-78346 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-78346/5 Analysis Batch: 720-78346 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09211005.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/21/2010 1033 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/21/2010 1033 <br /> LCSD Lab Sample ID: LCSD 720-78346/6 Analysis Batch: 720-78346 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09211006.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/21/2010 1105 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/21/2010 1105 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Trichloroethene 100 100 70-130 0.2 20 <br /> Tetrachloroethene 96 95 70-130 0.9 20 <br /> Surrogate LCS%Rec LCSD%Rec Acceptance Limits <br /> Toluene-d8(Surr) 95 96 70-130 <br /> 4-Bromofluorobenzene 98 97 67-130 <br /> 1,2-Dichloroethane-d4(Surr) 91 91 67-130 <br /> TestAmerica San Francisco Page 20 of 25 <br />