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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-19558-1 <br /> Matrix Spike/ Method: 8260B <br /> Matrix Spike Duplicate Recovery Report- Batch: 720-49944 Preparation: 5030B <br /> MS Lab Sample ID: 720-19546-B-1 MS Analysis Batch: 720-49944 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\050609\S, <br /> Dilution: 4.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/06/2009 1452 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/06/2009 1452 <br /> MSD Lab Sample ID: 720-19546-B-1 MSD Analysis Batch: 720-49944 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\050609\SA <br /> Dilution: 4.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/06/2009 1525 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/06/2009 1525 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1-Dichloroethene 78 50 70- 130 44 20 F <br /> 1,1-Dichloroethane 84 60 70- 130 33 20 F <br /> Dichlorodifluoromethane 56 34 70- 130 49 20 F <br /> Vinyl chloride 94 41 70- 130 11 20 4 4 <br /> Chloroethane 88 61 70- 130 36 20 F <br /> Trichlorofluoromethane 78 47 70- 130 50 20 F <br /> Methylene Chloride 82 63 70- 130 27 20 F <br /> trans-1,2-Dichloroethene 85 55 70- 130 41 20 F <br /> cis-1,2-Dichloroethene 84 64 70- 130 9 20 F <br /> Chloroform 88 63 70- 130 33 20 F <br /> 1,1,1-Trichloroethane 86 51 70- 130 51 20 F <br /> Carbon tetrachloride 92 53 70- 130 54 20 F <br /> 1,2-Dichloroethane 88 71 70- 130 20 20 <br /> Trichloroethene 92 56 70- 130 44 20 F <br /> 1,2-Dichloropropane 92 68 70- 130 30 20 F <br /> Dichlorobromomethane 89 70 70- 130 25 20 F <br /> trans-1,3-Dichloropropene 92 77 70- 130 17 20 <br /> cis-1,3-Dichloropropene 95 72 70- 130 27 20 F <br /> 1,1,2-Trichloroethane 97 84 70- 130 14 20 <br /> Tetrachloroethene 88 51 70- 130 53 20 F <br /> Chlorodibromomethane 85 75 70- 130 13 20 <br /> Chlorobenzene 96 69 70- 130 32 20 F <br /> Bromoform 99 89 70- 130 11 20 <br /> 1,1,2,2-Tetrachloroethane 84 77 70- 130 9 20 <br /> 1,3-Dichlorobenzene 93 63 70- 130 38 20 F <br /> 1,4-Dichlorobenzene 89 64 70- 130 34 20 F <br /> 1,2-Dichlorobenzene 98 73 70- 130 29 20 F <br /> Chloromethane 96 70 70- 130 31 20 F <br /> Bromomethane 146 107 70- 130 30 20 F <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 106 of 155 <br />