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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: 720-49841 Preparation: 5030B <br /> LCS Lab Sample ID:LCS 720-49841/3 Analysis Batch: 720-49841 Instrument ID: Saturn 2K3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: d:\data\200905\050609\LS. <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/06/2009 1955 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/06/2009 1955 <br /> LCSD Lab Sample ID:LCSD 720-49841/2 Analysis Batch: 720-49841 Instrument ID: Saturn 2K3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: d:\data\200905\050609\LD4 <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/06/2009 2027 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/06/2009 2027 <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 106 108 70- 130 2 20 <br /> 1,1-Dichloroethane 107 107 70- 130 0 20 <br /> Dichlorodifluoromethane 66 69 70- 130 4 20 <br /> Vinyl chloride 96 97 70- 130 1 20 <br /> Chloroethane 184 182 70- 130 1 20 <br /> Trichlorofluoromethane 92 92 70- 130 1 20 <br /> Methylene Chloride 109 108 70- 130 1 20 <br /> trans-1,2-Dichloroethene 105 104 70- 130 1 20 <br /> cis-1,2-Dichloroethene 105 105 70- 130 1 20 <br /> Chloroform 105 106 70- 130 0 20 <br /> 1,1,1-Trichloroethane 107 105 70- 130 2 20 <br /> Carbon tetrachloride 99 100 70- 130 2 20 <br /> 1,2-Dichloroethane 100 100 70- 130 0 20 <br /> Trichloroethene 111 112 70- 130 1 20 <br /> 1,2-Dichloropropane 100 101 70- 130 1 20 <br /> Dichlorobromomethane 96 97 70- 130 1 20 <br /> trans-1,3-Dichloropropene 91 90 70- 130 1 20 <br /> cis-1,3-Dichloropropene 92 91 70- 130 2 20 <br /> 1,1,2-Trichloroethane 87 90 70- 130 3 20 <br /> Tetrachloroethene 100 100 70- 130 0 20 <br /> Chlorodibromomethane 88 88 70- 130 1 20 <br /> Chlorobenzene 115 110 70- 130 4 20 <br /> Bromoform 85 83 70- 130 2 20 <br /> 1,1,2,2-Tetrachloroethane 84 78 70- 130 7 20 <br /> 1,3-Dichlorobenzene 111 103 70- 130 8 20 <br /> 1,4-Dichlorobenzene 109 110 70- 130 1 20 <br /> 1,2-Dichlorobenzene 110 110 70- 130 0 20 <br /> Chloromethane 82 85 70- 130 5 20 <br /> Bromomethane 58 67 70- 130 14 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 67 74 70- 130 10 20 <br /> EDB 92 91 70- 130 1 20 <br /> 1,2,4-Trichlorobenzene 109 116 70- 130 6 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 90 of 155 <br />