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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: 720-49979 Preparation: 5030B <br /> LCS Lab Sample ID:LCS 720-49979/1 Analysis Batch: 720-49979 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\050909\Is-� <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/09/2009 1115 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/09/2009 1115 <br /> LCSD Lab Sample ID:LCSD 720-49979/15 Analysis Batch: 720-49979 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\050909\Id-ws <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/09/2009 1148 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/09/2009 1148 <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 118 110 70- 130 8 20 <br /> 1,1-Dichloroethane 109 106 70- 130 4 20 <br /> Dichlorodifluoromethane 95 95 70- 130 1 20 <br /> Vinyl chloride 111 101 70- 130 9 20 <br /> Chloroethane 99 93 70- 130 5 20 <br /> Trichlorofluoromethane 112 109 70- 130 3 20 <br /> Methylene Chloride 96 93 70- 130 3 20 <br /> trans-1,2-Dichloroethene 109 109 70- 130 1 20 <br /> cis-1,2-Dichloroethene 115 114 70- 130 0 20 <br /> Chloroform 107 107 70- 130 0 20 <br /> 1,1,1-Trichloroethane 117 111 70- 130 5 20 <br /> Carbon tetrachloride 117 105 70- 130 10 20 <br /> 1,2-Dichloroethane 97 94 70- 130 4 20 <br /> Trichloroethene 108 104 70- 130 4 20 <br /> 1,2-Dichloropropane 107 105 70- 130 2 20 <br /> Dichlorobromomethane 107 105 70- 130 2 20 <br /> trans-1,3-Dichloropropene 102 98 70- 130 5 20 <br /> cis-1,3-Dichloropropene 104 100 70- 130 4 20 <br /> 1,1,2-Trichloroethane 121 122 70- 130 1 20 <br /> Tetrachloroethene 113 111 70- 130 2 20 <br /> Chlorodibromomethane 104 100 70- 130 4 20 <br /> Chlorobenzene 110 109 70- 130 1 20 <br /> Bromoform 102 106 70- 130 3 20 <br /> 1,1,2,2-Tetrachloroethane 103 104 70- 130 1 20 <br /> 1,3-Dichlorobenzene 112 114 70- 130 1 20 <br /> 1,4-Dichlorobenzene 103 105 70- 130 1 20 <br /> 1,2-Dichlorobenzene 107 114 70- 130 7 20 <br /> Chloromethane 98 95 70- 130 3 20 <br /> Bromomethane 103 99 70- 130 4 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 119 107 70- 130 11 20 <br /> EDB 99 98 70- 130 2 20 <br /> 1,2,4-Trichlorobenzene 93 107 70- 130 13 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 119 of 155 <br />