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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: 720-50713 Preparation: 5030B <br /> LCS Lab Sample ID:LCS 720-50713/11 Analysis Batch: 720-50713 Instrument ID: Chemstation 3.0 on 95PC <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 05200933.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 05/21/2009 0002 Final Weight/Volume: 10 mL <br /> Date Prepared: 05/21/2009 0002 <br /> LCSD Lab Sample ID:LCSD 720-50713/12 Analysis Batch: 720-50713 Instrument ID: Chemstation 3.0 on 95PC <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 05200934.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 05/21/2009 0033 Final Weight/Volume: 10 mL <br /> Date Prepared: 05/21/2009 0033 <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 105 101 70- 130 4 20 <br /> 1,1-Dichloroethane 110 112 70- 130 2 20 <br /> Dichlorodifluoromethane 77 77 70- 130 1 20 <br /> Vinyl chloride 103 105 70- 130 3 20 <br /> Chloroethane 118 121 70- 130 3 20 <br /> Trichlorofluoromethane 97 101 70- 130 4 20 <br /> Methylene Chloride 115 113 70- 130 2 20 <br /> trans-1,2-Dichloroethene 104 104 70- 130 0 20 <br /> cis-1,2-Dichloroethene 114 114 70- 130 0 20 <br /> Chloroform 112 114 70- 130 2 20 <br /> 1,1,1-Trichloroethane 118 120 70- 130 2 20 <br /> Carbon tetrachloride 117 119 70- 130 2 20 <br /> 1,2-Dichloroethane 115 112 70- 130 2 20 <br /> Trichloroethene 120 118 70- 130 1 20 <br /> 1,2-Dichloropropane 115 114 70- 130 1 20 <br /> Dichlorobromomethane 115 115 70- 130 0 20 <br /> trans-1,3-Dichloropropene 120 119 70- 130 1 20 <br /> cis-1,3-Dichloropropene 121 120 70- 130 1 20 <br /> 1,1,2-Trichloroethane 122 119 70- 130 2 20 <br /> Tetrachloroethene 112 107 70- 130 5 20 <br /> Chlorodibromomethane 117 114 70- 130 2 20 <br /> Chlorobenzene 110 110 70- 130 1 20 <br /> Bromoform 106 105 70- 130 0 20 <br /> 1,1,2,2-Tetrachloroethane 116 113 70- 130 3 20 <br /> 1,3-Dichlorobenzene 110 111 70- 130 1 20 <br /> 1,4-Dichlorobenzene 106 106 70- 130 0 20 <br /> 1,2-Dichlorobenzene 113 112 70- 130 1 20 <br /> Chloromethane 106 109 70- 130 3 20 <br /> Bromomethane 100 103 70- 130 3 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 95 95 70- 130 0 20 <br /> EDB 120 112 70- 130 6 20 <br /> 1,2,4-Trichlorobenzene 118 107 70- 130 10 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 147 of 155 <br />