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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: 720-49972 Preparation: 5030B <br /> LCS Lab Sample ID:LCS 720-49972/3 Analysis Batch: 720-49972 Instrument ID: Saturn 2K3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: d:\data\200905\050909\LS. <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/09/2009 1313 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/09/2009 1313 <br /> LCSD Lab Sample ID:LCSD 720-49972/2 Analysis Batch: 720-49972 Instrument ID: Saturn 2K3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: d:\data\200905\050909\LD4 <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/09/2009 1345 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/09/2009 1345 <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 102 102 70- 130 0 20 <br /> 1,1-Dichloroethane 97 99 70- 130 3 20 <br /> Dichlorodifluoromethane 95 100 70- 130 5 20 <br /> Vinyl chloride 99 102 70- 130 3 20 <br /> Chloroethane 171 175 70- 130 2 20 <br /> Trichlorofluoromethane 105 109 70- 130 3 20 <br /> Methylene Chloride 105 104 70- 130 0 20 <br /> trans-1,2-Dichloroethene 91 91 70- 130 1 20 <br /> cis-1,2-Dichloroethene 96 98 70- 130 3 20 <br /> Chloroform 95 97 70- 130 3 20 <br /> 1,1,1-Trichloroethane 97 96 70- 130 2 20 <br /> Carbon tetrachloride 92 93 70- 130 1 20 <br /> 1,2-Dichloroethane 88 86 70- 130 2 20 <br /> Trichloroethene 88 88 70- 130 0 20 <br /> 1,2-Dichloropropane 88 88 70- 130 0 20 <br /> Dichlorobromomethane 90 89 70- 130 0 20 <br /> trans-1,3-Dichloropropene 81 81 70- 130 1 20 <br /> cis-1,3-Dichloropropene 81 81 70- 130 1 20 <br /> 1,1,2-Trichloroethane 78 76 70- 130 3 20 <br /> Tetrachloroethene 102 102 70- 130 0 20 <br /> Chlorodibromomethane 78 76 70- 130 2 20 <br /> Chlorobenzene 106 110 70- 130 4 20 <br /> Bromoform 74 75 70- 130 2 20 <br /> 1,1,2,2-Tetrachloroethane 88 83 70- 130 5 20 <br /> 1,3-Dichlorobenzene 100 111 70- 130 10 20 <br /> 1,4-Dichlorobenzene 107 109 70- 130 1 20 <br /> 1,2-Dichlorobenzene 104 111 70- 130 6 20 <br /> Chloromethane 90 91 70- 130 1 20 <br /> Bromomethane 51 52 70- 130 3 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 96 99 70- 130 4 20 <br /> EDB 80 79 70- 130 1 20 <br /> 1,2,4-Trichlorobenzene 93 112 70- 130 19 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 114 of 155 <br />