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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-30642-1 <br /> Lab Control Sample/ Method: 8260B <br /> Lab Control Sample Duplicate Recovery Report- Batch: 720-78417 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-78417/5 Analysis Batch: 720-78417 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09211023.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/21/2010 2018 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/21/2010 2018 <br /> LCSD Lab Sample ID: LCSD 720-78417/6 Analysis Batch: 720-78417 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09211024.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/21/2010 2051 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/21/2010 2051 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 99 98 64-128 1 20 <br /> 1,1-Dichloroethane 103 101 70-130 1 20 <br /> Dichlorodifluoromethane 54 54 42-188 1 20 <br /> Vinyl chloride 78 77 65-156 0.8 20 <br /> Chloroethane 90 88 62-138 2 20 <br /> Trichlorofluoromethane 101 103 74-146 2 20 <br /> Methylene Chloride 105 102 73-147 2 20 <br /> trans-1,2-Dichloroethene 107 106 75-131 2 20 <br /> cis-1,2-Dichloroethene 110 109 70-130 1 20 <br /> Chloroform 106 104 70-130 2 20 <br /> 1,1,1-Trichloroethane 111 110 70-130 0.7 20 <br /> Carbon tetrachloride 112 111 77-146 0.9 20 <br /> 1,2-Dichloroethane 101 98 70-126 3 20 <br /> Trichloroethene 106 106 70-130 0.4 20 <br /> 1,2-Dichloropropane 110 108 70-130 2 20 <br /> Dichlorobromomethane 116 113 70-130 3 20 <br /> trans-1,3-Dichloropropene 116 112 70-130 3 20 <br /> cis-1,3-Dichloropropene 114 111 70-130 2 20 <br /> 1,1,2-Trichloroethane 114 110 86-135 4 20 <br /> Tetrachloroethene 101 98 70-130 3 20 <br /> Chlorodibromomethane 117 113 78-145 4 20 <br /> Chlorobenzene 104 103 70-130 1 20 <br /> Bromoform 112 109 68-136 3 20 <br /> 1,1,2,2-Tetrachloroethane 108 104 70-130 4 20 <br /> 1,3-Dichlorobenzene 102 101 70-130 1 20 <br /> 1,4-Dichlorobenzene 103 102 82-113 2 20 <br /> 1,2-Dichlorobenzene 101 100 70-130 1 20 <br /> Chloromethane 79 78 52-175 2 20 <br /> Bromomethane 92 90 43-151 2 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 98 97 42-162 0.9 20 <br /> EDB 109 105 70-130 4 20 <br /> 1,2,4-Trichlorobenzene 95 93 70-130 1 20 <br /> TestAmerica San Francisco Page 12 of 18 <br />