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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-20913-1 <br /> Lab Control Sample/ Method: 524.2 <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-53524 Preparation: N/A <br /> LCS Lab Sample ID: LCS 720-53524/5 Analysis Batch: 720-53524 Instrument ID: ChemStation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 07020905.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 25 mL <br /> Date Analyzed: 07/02/2009 1426 Final Weight/Volume: 25 mL <br /> Date Prepared: N/A <br /> LCSD Lab Sample ID: LCSD 720-53524/6 Analysis Batch: 720-53524 Instrument ID: ChemStation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 07020906.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 25 mL <br /> Date Analyzed: 07/02/2009 1500 Final Weight/Volume: 25 mL <br /> Date Prepared: N/A <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1,1-Trichloroethane 111 109 70-130 2 20 <br /> 1,1,2,2-Tetrachloroethane 111 101 70-130 9 20 <br /> 1,1,2-Trichloroethane 103 100 70-130 3 20 <br /> 1,1-Dichloroethane 109 111 70-130 2 20 <br /> 1,1-Dichloroethene 107 105 70-130 1 20 <br /> 1,2-Dichlorobenzene 112 109 70-130 3 20 <br /> 1,2-Dichloroethane 104 108 70-130 3 20 <br /> 1,2-Dichloropropane 100 97 70-130 3 20 <br /> 1,3-Dichlorobenzene 115 114 70-130 1 20 <br /> 1,4-Dichlorobenzene 112 109 70-130 3 20 <br /> Bromoform 103 111 70-130 7 20 <br /> Bromomethane 100 104 70-130 4 20 <br /> Carbon tetrachloride 108 109 70-130 1 20 <br /> Chlorobenzene 110 115 70-130 4 20 <br /> Dibromochloromethane 106 112 70-130 5 20 <br /> Chloroethane 107 104 70-130 3 20 <br /> Chloroform 111 111 70-130 0 20 <br /> Chloromethane 113 109 70-130 4 20 <br /> cis-1,2-Dichloroethene 110 114 70-130 4 20 <br /> cis-1,3-Dichloropropene 102 103 70-130 1 20 <br /> Dichlorobromomethane 114 112 70-130 1 20 <br /> Methylene Chloride 122 121 70-130 1 20 <br /> Tetrachloroethene 101 105 70-130 4 20 <br /> trans-1,2-Dichloroethene 97 104 70-130 6 20 <br /> trans-1,3-Dichloropropene 101 95 70-130 6 20 <br /> Trichloroethene 110 109 70-130 2 20 <br /> Trichlorofluoromethane 118 131 70-130 10 20 <br /> Vinyl chloride 114 113 70-130 0 20 <br /> Ethylene Dibromide 103 101 70-130 2 20 <br /> Surrogate LCS%Rec LCSD%Rec Acceptance Limits <br /> 1,2-Dichlorobenzene-d4 99 97 70-130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 27 Of 34 <br />