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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: 720-49944 Preparation: 5030B <br /> LCS Lab Sample ID:LCS 720-49944/2 Analysis Batch: 720-49944 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\050609\LS. <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/06/2009 1057 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/06/2009 1057 <br /> LCSD Lab Sample ID:LCSD 720-49944/1 Analysis Batch: 720-49944 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\050609\LD4 <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/06/2009 1130 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/06/2009 1130 <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 96 98 70- 130 2 20 <br /> 1,1-Dichloroethane 102 100 70- 130 2 20 <br /> Dichlorodifluoromethane 75 75 70- 130 0 20 <br /> Vinyl chloride 123 122 70- 130 1 20 <br /> Chloroethane 109 108 70- 130 1 20 <br /> Trichlorofluoromethane 93 96 70- 130 4 20 <br /> Methylene Chloride 98 103 70- 130 5 20 <br /> trans-1,2-Dichloroethene 98 102 70- 130 4 20 <br /> cis-1,2-Dichloroethene 95 100 70- 130 5 20 <br /> Chloroform 99 105 70- 130 6 20 <br /> 1,1,1-Trichloroethane 97 94 70- 130 4 20 <br /> Carbon tetrachloride 110 103 70- 130 6 20 <br /> 1,2-Dichloroethane 95 99 70- 130 4 20 <br /> Trichloroethene 97 100 70- 130 4 20 <br /> 1,2-Dichloropropane 102 99 70- 130 3 20 <br /> Dichlorobromomethane 99 97 70- 130 2 20 <br /> trans-1,3-Dichloropropene 97 99 70- 130 3 20 <br /> cis-1,3-Dichloropropene 102 104 70- 130 1 20 <br /> 1,1,2-Trichloroethane 102 97 70- 130 5 20 <br /> Tetrachloroethene 104 104 70- 130 1 20 <br /> Chlorodibromomethane 96 94 70- 130 2 20 <br /> Chlorobenzene 116 109 70- 130 6 20 <br /> Bromoform 102 106 70- 130 3 20 <br /> 1,1,2,2-Tetrachloroethane 84 87 70- 130 4 20 <br /> 1,3-Dichlorobenzene 100 102 70- 130 2 20 <br /> 1,4-Dichlorobenzene 105 102 70- 130 3 20 <br /> 1,2-Dichlorobenzene 110 115 70- 130 4 20 <br /> Chloromethane 126 127 70- 130 1 20 <br /> Bromomethane 182 188 70- 130 4 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 81 81 70- 130 0 20 <br /> EDB 92 94 70- 130 2 20 <br /> 1,2,4-Trichlorobenzene 118 125 70- 130 6 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 104 of 155 <br />