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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: 720-50035 Preparation: 5030B <br /> LCS Lab Sample ID:LCS 720-50035/2 Analysis Batch: 720-50035 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\051109\LS. <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/11/2009 1207 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/11/2009 1207 <br /> LCSD Lab Sample ID:LCSD 720-50035/1 Analysis Batch: 720-50035 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\051109\LD4 <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/11/2009 1240 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/11/2009 1240 <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 117 107 70- 130 8 20 <br /> 1,1-Dichloroethane 113 105 70- 130 8 20 <br /> Dichlorodifluoromethane 90 87 70- 130 3 20 <br /> Vinyl chloride 104 101 70- 130 4 20 <br /> Chloroethane 99 98 70- 130 1 20 <br /> Trichlorofluoromethane 107 105 70- 130 1 20 <br /> Methylene Chloride 104 99 70- 130 5 20 <br /> trans-1,2-Dichloroethene 109 109 70- 130 0 20 <br /> cis-1,2-Dichloroethene 117 113 70- 130 3 20 <br /> Chloroform 109 111 70- 130 2 20 <br /> 1,1,1-Trichloroethane 117 113 70- 130 3 20 <br /> Carbon tetrachloride 115 111 70- 130 4 20 <br /> 1,2-Dichloroethane 108 103 70- 130 5 20 <br /> Trichloroethene 109 109 70- 130 0 20 <br /> 1,2-Dichloropropane 112 108 70- 130 3 20 <br /> Dichlorobromomethane 109 106 70- 130 3 20 <br /> trans-1,3-Dichloropropene 104 100 70- 130 4 20 <br /> cis-1,3-Dichloropropene 106 98 70- 130 8 20 <br /> 1,1,2-Trichloroethane 117 103 70- 130 13 20 <br /> Tetrachloroethene 116 108 70- 130 7 20 <br /> Chlorodibromomethane 103 102 70- 130 1 20 <br /> Chlorobenzene 111 108 70- 130 3 20 <br /> Bromoform 105 0 70- 130 200 20 <br /> 1,1,2,2-Tetrachloroethane 104 108 70- 130 4 20 <br /> 1,3-Dichlorobenzene 106 113 70- 130 6 20 <br /> 1,4-Dichlorobenzene 106 109 70- 130 3 20 <br /> 1,2-Dichlorobenzene 104 112 70- 130 7 20 <br /> Chloromethane 98 96 70- 130 2 20 <br /> Bromomethane 105 97 70- 130 8 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 106 106 70- 130 1 20 <br /> EDB 106 99 70- 130 7 20 <br /> 1,2,4-Trichlorobenzene 95 107 70- 130 13 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 138 of 155 <br />