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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-30698-1 <br /> Method Blank-Batch: 720-79016 Method: 82608/CA_LUFTMS <br /> Preparation: 5030B <br /> Lab Sample ID: MB 720-79016/8 Analysis Batch: 720-79016 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09301004.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/30/2010 1017 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/30/2010 1017 <br /> Analyte Result Qual RL <br /> Tetrachloroethene ND 0.50 <br /> Surrogate %Rec Acceptance Limits <br /> Toluene-d8(Surr) 92 70-130 <br /> 4-Bromofluoro benzene 92 67-130 <br /> 1,2-Dichloroethane-d4(Surr) 101 67-130 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-79016 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-79016/22 Analysis Batch: 720-79016 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09301009.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/30/2010 1311 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/30/2010 1311 <br /> LCSD Lab Sample ID: LCSD 720-79016/21 Analysis Batch: 720-79016 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09301010.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/30/2010 1343 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/30/2010 1343 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Tetrachloroethene 100 100 70-130 1 20 <br /> Surrogate LCS%Rec LCSD%Rec Acceptance Limits <br /> Toluene-d8(Surr) 94 94 70-130 <br /> 4-Bromofluorobenzene 98 96 67-130 <br /> 1,2-Dichloroethane-d4(Surr) 95 94 67-130 <br /> TestAmerica San Francisco Page 20 of 23 <br />