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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-30603-1 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-78323 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-78323/5 Analysis Batch: 720-78323 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09201023.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/20/2010 2021 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/20/2010 2021 <br /> LCSD Lab Sample ID: LCSD 720-78323/6 Analysis Batch: 720-78323 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09201024.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/20/2010 2054 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/20/2010 2054 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 97 96 64-128 1 20 <br /> 1,1-Dichloroethane 101 100 70-130 0.7 20 <br /> Dichlorodifluoromethane 58 57 42-188 0.5 20 <br /> Vinyl chloride 82 80 65-156 3 20 <br /> Chloroethane 91 90 62-138 0.9 20 <br /> Trichlorofluoromethane 99 94 74-146 5 20 <br /> Methylene Chloride 99 99 73-147 0.1 20 <br /> trans-1,2-Dichloroethene 104 104 75-131 0.2 20 <br /> cis-1,2-Dichloroethene 106 107 70-130 0.9 20 <br /> Chloroform 100 100 70-130 0.3 20 <br /> 1,1,1-Trichloroethane 107 107 70-130 0.06 20 <br /> Carbon tetrachloride 107 106 77-146 0.2 20 <br /> 1,2-Dichloroethane 93 95 70-126 2 20 <br /> Trichloroethene 103 102 70-130 1 20 <br /> 1,2-Dichloropropane 105 106 70-130 0.5 20 <br /> Dichlorobromomethane 108 108 70-130 0.6 20 <br /> trans-1,3-Dichloropropene 106 108 70-130 2 20 <br /> cis-1,3-Dichloropropene 107 108 70-130 0.6 20 <br /> 1,1,2-Trichloroethane 103 107 86-135 3 20 <br /> Tetrachloroethene 95 95 70-130 0.4 20 <br /> Chlorodibromomethane 107 110 78-145 3 20 <br /> Chlorobenzene 101 101 70-130 0.5 20 <br /> Bromoform 104 109 68-136 5 20 <br /> 1,1,2,2-Tetrachloroethane 100 108 70-130 7 20 <br /> 1,3-Dichlorobenzene 101 101 70-130 0.04 20 <br /> 1,4-Dichlorobenzene 100 101 82-113 1 20 <br /> 1,2-Dichlorobenzene 99 100 70-130 1 20 <br /> Chloromethane 82 82 52-175 1 20 <br /> Bromomethane 91 89 43-151 2 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 95 95 42-162 0.4 20 <br /> EDB 100 102 70-130 2 20 <br /> 1,2,4-Trichlorobenzene 91 89 70-130 2 20 <br /> TestAmerica San Francisco Page 16 of 25 <br />