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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-19558-1 <br /> Matrix Spike - Batch: 720-49772 Method: 8260B <br /> Preparation: 5030B <br /> Lab Sample ID: 720-19558-2 Analysis Batch: 720-49772 Instrument ID: Chemstation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 05060916.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 05/06/2009 1727 Final Weight/Volume: 10 mL <br /> Date Prepared: 05/06/2009 1727 <br /> Analyte Sample Result/Qual Spike Amount Result % Rec. Limit Qual <br /> 1,1-Dichloroethene ND 10.0 9.57 94 70- 130 <br /> 1,1-Dichloroethane ND 10.0 10.2 102 70- 130 <br /> Dichlorodifluoromethane ND 10.0 8.06 81 70- 130 <br /> Vinyl chloride 14 10.0 20.0 65 70- 130 F <br /> Chloroethane ND 10.0 9.89 99 70- 130 <br /> Trichlorofluoromethane ND 10.0 9.91 99 70- 130 <br /> Methylene Chloride ND 10.0 10.1 101 70- 130 <br /> trans-1,2-Dichloroethene ND 10.0 9.94 96 70- 130 <br /> cis-1,2-Dichloroethene 13 10.0 22.9 103 70- 130 <br /> Chloroform ND 10.0 10.4 104 70- 130 <br /> 1,1,1-Trichloroethane ND 10.0 10.2 102 70- 130 <br /> Carbon tetrachloride ND 10.0 10.3 103 70- 130 <br /> 1,2-Dichloroethane ND 10.0 10.5 105 70- 130 <br /> Trichloroethene 3.5 10.0 13.5 100 70- 130 <br /> 1,2-Dichloropropane ND 10.0 10.6 106 70- 130 <br /> Dichlorobromomethane ND 10.0 11.3 113 70- 130 <br /> trans-1,3-Dichloropropene ND 10.0 11.1 111 70- 130 <br /> cis-1,3-Dichloropropene ND 10.0 10.8 108 70- 130 <br /> 1,1,2-Trichloroethane ND 10.0 11.1 111 70- 130 <br /> Tetrachloroethene ND 10.0 10.1 101 70- 130 <br /> Chlorodibromomethane ND 10.0 9.51 95 70- 130 <br /> Chlorobenzene ND 10.0 10.3 103 70- 130 <br /> Bromoform ND 10.0 8.89 89 70- 130 <br /> 1,1,2,2-Tetrachloroethane ND 10.0 11.0 110 70- 130 <br /> 1,3-Dichlorobenzene ND 10.0 10.6 106 70- 130 <br /> 1,4-Dichlorobenzene ND 10.0 9.98 100 70- 130 <br /> 1,2-Dichlorobenzene ND 10.0 10.4 104 70- 130 <br /> Chloromethane ND 10.0 9.34 93 70- 130 <br /> Bromomethane ND 10.0 9.75 97 70- 130 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane ND 10.0 9.41 94 70- 130 <br /> EDB ND 10.0 10.6 106 70- 130 <br /> 1,2,4-Trichlorobenzene ND 10.0 10.2 102 70- 130 <br /> Surrogate % Rec Acceptance Limits <br /> Toluene-d8(Surr) 99 70- 130 <br /> 4-Bromofluorobenzene 100 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 87 of 155 <br />