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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-20560-1 <br /> Lab Control Sample/ Method: 524.2 <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-52756 Preparation: N/A <br /> LCS Lab Sample ID: LCS 720-52756/3 Analysis Batch: 720-52756 Instrument ID: ChemStation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 06220907.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 25 mL <br /> Date Analyzed: 06/22/2009 1758 Final Weight/Volume: 25 mL <br /> Date Prepared: N/A <br /> LCSD Lab Sample ID: LCSD 720-52756/4 Analysis Batch: 720-52756 Instrument ID: ChemStation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 06220908.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 25 mL <br /> Date Analyzed: 06/22/2009 1832 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 100 101 70-130 0 20 <br /> 1,1,2,2-Tetrachloroethane 115 113 70-130 2 20 <br /> 1,1,2-Trichloroethane 102 112 70-130 10 20 <br /> 1,1-Dichloroethane 102 105 70-130 3 20 <br /> 1,1-Dichloroethene 98 90 70-130 8 20 <br /> 1,2-Dichlorobenzene 117 116 70-130 1 20 <br /> 1,2-Dichloroethane 102 102 70-130 1 20 <br /> 1,2-Dichloropropane 98 98 70-130 0 20 <br /> 1,3-Dichlorobenzene 123 122 70-130 1 20 <br /> 1,4-Dichlorobenzene 117 118 70-130 0 20 <br /> Bromoform 114 122 70-130 7 20 <br /> Bromomethane 90 90 70-130 0 20 <br /> Carbon tetrachloride 102 99 70-130 3 20 <br /> Chlorobenzene 118 116 70-130 1 20 <br /> Dibromochloromethane 110 116 70-130 5 20 <br /> Chloroethane 97 94 70-130 3 20 <br /> Chloroform 102 105 70-130 3 20 <br /> Chloromethane 103 100 70-130 3 20 <br /> cis-1,2-Dichloroethene 101 108 70-130 7 20 <br /> cis-1,3-Dichloropropene 103 106 70-130 3 20 <br /> Dichlorobromomethane 112 113 70-130 0 20 <br /> Methylene Chloride 95 98 70-130 3 20 <br /> Tetrachloroethene 100 102 70-130 1 20 <br /> trans-1,2-Dichloroethene 94 92 70-130 1 20 <br /> trans-1,3-Dichloropropene 100 103 70-130 3 20 <br /> Trichloroethene 101 103 70-130 2 20 <br /> Trichlorofluoromethane 108 108 70-130 1 20 <br /> Vinyl chloride 102 100 70-130 3 20 <br /> Ethylene Dibromide 100 103 70-130 3 20 <br /> Surrogate LCS%Rec LCSD%Rec Acceptance Limits <br /> 1,2-Dichlorobenzene-d4 96 95 70-130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 21 Of 29 <br />