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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: 720-49994 Preparation: 5030B <br /> LCS Lab Sample ID:LCS 720-49994/2 Analysis Batch: 720-49994 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 2019 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/08/2009 2019 <br /> LCSD Lab Sample ID:LCSD 720-49994/1 Analysis Batch: 720-49994 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 2053 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/08/2009 2053 <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 112 107 70- 130 5 20 <br /> 1,1-Dichloroethane 105 108 70- 130 3 20 <br /> Dichlorodifluoromethane 95 92 70- 130 3 20 <br /> Vinyl chloride 109 103 70- 130 6 20 <br /> Chloroethane 100 99 70- 130 1 20 <br /> Trichlorofluoromethane 107 106 70- 130 0 20 <br /> Methylene Chloride 98 93 70- 130 5 20 <br /> trans-1,2-Dichloroethene 108 111 70- 130 3 20 <br /> cis-1,2-Dichloroethene 115 113 70- 130 2 20 <br /> Chloroform 109 107 70- 130 1 20 <br /> 1,1,1-Trichloroethane 113 112 70- 130 0 20 <br /> Carbon tetrachloride 114 113 70- 130 0 20 <br /> 1,2-Dichloroethane 112 106 70- 130 5 20 <br /> Trichloroethene 109 111 70- 130 2 20 <br /> 1,2-Dichloropropane 107 108 70- 130 1 20 <br /> Dichlorobromomethane 110 108 70- 130 2 20 <br /> trans-1,3-Dichloropropene 102 105 70- 130 3 20 <br /> cis-1,3-Dichloropropene 106 107 70- 130 0 20 <br /> 1,1,2-Trichloroethane 127 123 70- 130 3 20 <br /> Tetrachloroethene 114 116 70- 130 2 20 <br /> Chlorodibromomethane 108 108 70- 130 0 20 <br /> Chlorobenzene 109 111 70- 130 2 20 <br /> Bromoform 114 0 70- 130 200 20 <br /> 1,1,2,2-Tetrachloroethane 108 105 70- 130 3 20 <br /> 1,3-Dichlorobenzene 113 108 70- 130 4 20 <br /> 1,4-Dichlorobenzene 107 106 70- 130 1 20 <br /> 1,2-Dichlorobenzene 109 112 70- 130 2 20 <br /> Chloromethane 99 102 70- 130 4 20 <br /> Bromomethane 94 96 70- 130 3 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 111 106 70- 130 4 20 <br /> EDB 103 102 70- 130 1 20 <br /> 1,2,4-Trichlorobenzene 97 102 70- 130 5 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 128 of 155 <br />