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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-19558-1 <br /> Lab Control Sample - Batch: 720-49772 Method: 8260B <br /> Preparation: 5030B <br /> Lab Sample ID: LCS 720-49772/4 Analysis Batch: 720-49772 Instrument ID: Chemstation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 05060913.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 05/06/2009 1554 Final Weight/Volume: 10 mL <br /> Date Prepared: 05/06/2009 1554 <br /> Analyte Spike Amount Result % Rec. Limit Qual <br /> 1,1-Dichloroethene 10.0 9.65 96 70- 130 <br /> 1,1-Dichloroethane 10.0 10.2 102 70- 130 <br /> Dichlorodifluoromethane 10.0 7.80 78 70- 130 <br /> Vinyl chloride 10.0 9.45 94 70- 130 <br /> Chloroethane 10.0 9.70 97 70- 130 <br /> Trichlorofluoromethane 10.0 10.2 102 70- 130 <br /> Methylene Chloride 10.0 9.94 99 70- 130 <br /> trans-1,2-Dichloroethene 10.0 9.83 98 70- 130 <br /> cis-1,2-Dichloroethene 10.0 10.5 105 70- 130 <br /> Chloroform 10.0 10.5 105 70- 130 <br /> 1,1,1-Trichloroethane 10.0 10.5 105 70- 130 <br /> Carbon tetrachloride 10.0 10.4 104 70- 130 <br /> 1,2-Dichloroethane 10.0 10.5 105 70- 130 <br /> Trichloroethene 10.0 10.2 102 70- 130 <br /> 1,2-Dichloropropane 10.0 10.7 107 70- 130 <br /> Dichlorobromomethane 10.0 11.3 113 70- 130 <br /> trans-1,3-Dichloropropene 10.0 11.0 110 70- 130 <br /> cis-1,3-Dichloropropene 10.0 10.9 109 70- 130 <br /> 1,1,2-Trichloroethane 10.0 11.2 112 70- 130 <br /> Tetrachloroethene 10.0 10.2 102 70- 130 <br /> Chlorodibromomethane 10.0 9.45 95 70- 130 <br /> Chlorobenzene 10.0 10.5 105 70- 130 <br /> Bromoform 10.0 9.09 91 70- 130 <br /> 1,1,2,2-Tetrachloroethane 10.0 11.0 110 70- 130 <br /> 1,3-Dichlorobenzene 10.0 10.9 109 70- 130 <br /> 1,4-Dichlorobenzene 10.0 10.4 104 70- 130 <br /> 1,2-Dichlorobenzene 10.0 10.6 106 70- 130 <br /> Chloromethane 10.0 9.28 93 70- 130 <br /> Bromomethane 10.0 9.39 94 70- 130 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 10.0 9.72 97 70- 130 <br /> EDB 10.0 10.6 106 70- 130 <br /> 1,2,4-Trichlorobenzene 10.0 10.5 105 70- 130 <br /> Surrogate % Rec Acceptance Limits <br /> Toluene-d8(Surr) 100 70- 130 <br /> 4-Bromofluorobenzene 101 67- 130 <br /> 1,2-Dichloroethane-d4(Surr) 102 67- 130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 86 of 155 <br />