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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-31617-1 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report- Batch: 720-81384 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-81384/5 Analysis Batch: 720-81384 Instrument ID: HP4 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 110810023.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 11/08/2010 2022 Final Weight/Volume: 10 mL <br /> Date Prepared: 11/08/2010 2022 <br /> LCSD Lab Sample ID: LCSD 720-81384/6 Analysis Batch: 720-81384 Instrument ID: HP4 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 110810024.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 11/08/2010 2054 Final Weight/Volume: 10 mL <br /> Date Prepared: 11/08/2010 2054 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 114 105 64-128 9 20 <br /> 1,1-Dichloroethane 113 110 70-130 3 20 <br /> Dichlorodifluoromethane 99 99 33-125 1 20 <br /> Vinyl chloride 108 103 65-156 5 20 <br /> Chloroethane 109 107 62-138 3 20 <br /> Trichlorofluoromethane 119 111 74-146 8 20 <br /> Methylene Chloride 101 97 73-147 4 20 <br /> trans-1,2-Dichloroethene 100 95 75-131 4 20 <br /> cis-1,2-Dichloroethene 123 120 70-130 3 20 <br /> Chloroform 116 111 70-130 4 20 <br /> 1,1,1-Trichloroethane 116 111 70-130 4 20 <br /> Carbon tetrachloride 121 114 77-146 6 20 <br /> 1,2-Dichloroethane 111 110 70-126 1 20 <br /> Trichloroethene 110 107 70-130 3 20 <br /> 1,2-Dichloropropane 108 104 70-130 4 20 <br /> Dichlorobromomethane 121 117 70-130 3 20 <br /> trans-1,3-Dichloropropene 123 121 70-130 2 20 <br /> cis-1,3-Dichloropropene 117 114 70-130 2 20 <br /> 1,1,2-Trichloroethane 113 112 86-135 1 20 <br /> Tetrachloroethene 112 104 70-130 7 20 <br /> Chlorodibromomethane 114 112 78-145 2 20 <br /> Chlorobenzene 108 103 70-130 5 20 <br /> Bromoform 111 110 68-136 1 20 <br /> 1,1,2,2-Tetrachloroethane 112 113 70-130 0 20 <br /> 1,3-Dichlorobenzene 112 106 70-130 5 20 <br /> 1,4-Dichlorobenzene 109 105 82-113 4 20 <br /> 1,2-Dichlorobenzene 108 104 70-130 4 20 <br /> Chloromethane 114 108 52-175 6 20 <br /> Bromomethane 110 107 43-151 3 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 108 102 42-162 5 20 <br /> EDB 109 108 70-130 1 20 <br /> 1,2,4-Trichlorobenzene 95 93 70-130 2 20 <br /> TestAmerica San Francisco Page 25 of 36 <br />