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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: 720-49897 Preparation: 5030B <br /> LCS Lab Sample ID:LCS 720-49897/3 Analysis Batch: 720-49897 Instrument ID: Saturn 2K3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: d:\data\200905\050709\LS. <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/07/2009 1129 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/07/2009 1129 <br /> LCSD Lab Sample ID:LCSD 720-49897/2 Analysis Batch: 720-49897 Instrument ID: Saturn 2K3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: d:\data\200905\050709\LD4 <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/07/2009 1200 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/07/2009 1200 <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 107 109 70- 130 1 20 <br /> 1,1-Dichloroethane 105 110 70- 130 5 20 <br /> Dichlorodifluoromethane 80 85 70- 130 6 20 <br /> Vinyl chloride 96 100 70- 130 4 20 <br /> Chloroethane 179 184 70- 130 3 20 <br /> Trichlorofluoromethane 97 102 70- 130 4 20 <br /> Methylene Chloride 108 111 70- 130 3 20 <br /> trans-1,2-Dichloroethene 103 105 70- 130 3 20 <br /> cis-1,2-Dichloroethene 102 108 70- 130 5 20 <br /> Chloroform 101 106 70- 130 5 20 <br /> 1,1,1-Trichloroethane 105 109 70- 130 4 20 <br /> Carbon tetrachloride 104 106 70- 130 2 20 <br /> 1,2-Dichloroethane 100 99 70- 130 1 20 <br /> Trichloroethene 100 101 70- 130 1 20 <br /> 1,2-Dichloropropane 103 103 70- 130 1 20 <br /> Dichlorobromomethane 96 97 70- 130 2 20 <br /> trans-1,3-Dichloropropene 96 95 70- 130 1 20 <br /> cis-1,3-Dichloropropene 96 96 70- 130 0 20 <br /> 1,1,2-Trichloroethane 87 88 70- 130 2 20 <br /> Tetrachloroethene 109 111 70- 130 2 20 <br /> Chlorodibromomethane 89 87 70- 130 2 20 <br /> Chlorobenzene 118 120 70- 130 2 20 <br /> Bromoform 82 82 70- 130 0 20 <br /> 1,1,2,2-Tetrachloroethane 98 96 70- 130 2 20 <br /> 1,3-Dichlorobenzene 107 109 70- 130 2 20 <br /> 1,4-Dichlorobenzene 115 114 70- 130 1 20 <br /> 1,2-Dichlorobenzene 113 111 70- 130 2 20 <br /> Chloromethane 84 90 70- 130 8 20 <br /> Bromomethane 69 108 70- 130 44 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 101 86 70- 130 16 20 <br /> EDB 88 92 70- 130 4 20 <br /> 1,2,4-Trichlorobenzene 104 114 70- 130 10 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 99 of 155 <br />