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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: 720-49961 Preparation: 5030B <br /> LCS Lab Sample ID:LCS 720-49961/3 Analysis Batch: 720-49961 Instrument ID: Saturn 2K3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: d:\data\200905\050809\mb <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/08/2009 1005 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/08/2009 1005 <br /> LCSD Lab Sample ID:LCSD 720-49961/4 Analysis Batch: 720-49961 Instrument ID: Saturn 2K3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: d:\data\200905\050809\mb-� <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/08/2009 1037 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/08/2009 1037 <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 94 89 70- 130 5 20 <br /> 1,1-Dichloroethane 92 93 70- 130 1 20 <br /> Dichlorodifluoromethane 106 97 70- 130 8 20 <br /> Vinyl chloride 97 91 70- 130 7 20 <br /> Chloroethane 168 168 70- 130 0 20 <br /> Trichlorofluoromethane 103 96 70- 130 6 20 <br /> Methylene Chloride 97 97 70- 130 0 20 <br /> trans-1,2-Dichloroethene 82 83 70- 130 1 20 <br /> cis-1,2-Dichloroethene 88 88 70- 130 0 20 <br /> Chloroform 89 92 70- 130 4 20 <br /> 1,1,1-Trichloroethane 89 91 70- 130 2 20 <br /> Carbon tetrachloride 86 88 70- 130 2 20 <br /> 1,2-Dichloroethane 85 92 70- 130 8 20 <br /> Trichloroethene 82 84 70- 130 2 20 <br /> 1,2-Dichloropropane 87 88 70- 130 1 20 <br /> Dichlorobromomethane 87 92 70- 130 5 20 <br /> trans-1,3-Dichloropropene 81 84 70- 130 4 20 <br /> cis-1,3-Dichloropropene 81 84 70- 130 4 20 <br /> 1,1,2-Trichloroethane 78 80 70- 130 2 20 <br /> Tetrachloroethene 94 99 70- 130 6 20 <br /> Chlorodibromomethane 79 84 70- 130 6 20 <br /> Chlorobenzene 111 113 70- 130 2 20 <br /> Bromoform 81 81 70- 130 0 20 <br /> 1,1,2,2-Tetrachloroethane 106 105 70- 130 1 20 <br /> 1,3-Dichlorobenzene 111 107 70- 130 4 20 <br /> 1,4-Dichlorobenzene 117 119 70- 130 2 20 <br /> 1,2-Dichlorobenzene 117 113 70- 130 4 20 <br /> Chloromethane 84 85 70- 130 1 20 <br /> Bromomethane 55 54 70- 130 1 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 99 96 70- 130 2 20 <br /> EDB 80 84 70- 130 5 20 <br /> 1,2,4-Trichlorobenzene 108 116 70- 130 7 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 109 of 155 <br />