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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-19558-1 <br /> Lab Control Sample/ Method: 8260B <br /> Lab Control Sample Duplicate Recovery Report- Batch: 720-49995 Preparation: 5030B <br /> LCS Lab Sample ID:LCS 720-49995/4 Analysis Batch: 720-49995 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\050809\Is-� <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/08/2009 1040 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/08/2009 1040 <br /> LCSD Lab Sample ID:LCSD 720-49995/2 Analysis Batch: 720-49995 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\050809\Id-ws <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/08/2009 1114 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/08/2009 1114 <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 102 95 70- 130 6 20 <br /> 1,1-Dichloroethane 102 99 70- 130 3 20 <br /> Dichlorodifluoromethane 96 96 70- 130 0 20 <br /> Vinyl chloride 106 102 70- 130 3 20 <br /> Chloroethane 98 94 70- 130 5 20 <br /> Trichlorofluoromethane 100 100 70- 130 0 20 <br /> Methylene Chloride 92 94 70- 130 2 20 <br /> trans-1,2-Dichloroethene 101 96 70- 130 5 20 <br /> cis-1,2-Dichloroethene 101 103 70- 130 1 20 <br /> Chloroform 99 101 70- 130 3 20 <br /> 1,1,1-Trichloroethane 105 98 70- 130 7 20 <br /> Carbon tetrachloride 106 98 70- 130 8 20 <br /> 1,2-Dichloroethane 96 97 70- 130 2 20 <br /> Trichloroethene 102 97 70- 130 5 20 <br /> 1,2-Dichloropropane 99 100 70- 130 1 20 <br /> Dichlorobromomethane 102 102 70- 130 0 20 <br /> trans-1,3-Dichloropropene 91 107 70- 130 17 20 <br /> cis-1,3-Dichloropropene 93 99 70- 130 7 20 <br /> 1,1,2-Trichloroethane 112 116 70- 130 4 20 <br /> Tetrachloroethene 103 97 70- 130 6 20 <br /> Chlorodibromomethane 91 106 70- 130 16 20 <br /> Chlorobenzene 103 100 70- 130 3 20 <br /> Bromoform 82 111 70- 130 30 20 <br /> 1,1,2,2-Tetrachloroethane 97 113 70- 130 15 20 <br /> 1,3-Dichlorobenzene 101 101 70- 130 0 20 <br /> 1,4-Dichlorobenzene 99 99 70- 130 0 20 <br /> 1,2-Dichlorobenzene 101 111 70- 130 9 20 <br /> Chloromethane 101 94 70- 130 8 20 <br /> Bromomethane 99 99 70- 130 0 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 102 102 70- 130 0 20 <br /> EDB 88 102 70- 130 15 20 <br /> 1,2,4-Trichlorobenzene 84 100 70- 130 18 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 133 of 155 <br />