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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-30722-1 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-78605 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-78605/6 Analysis Batch: 720-78605 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09231024.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/23/2010 2044 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/23/2010 2044 <br /> LCSD Lab Sample ID: LCSD 720-78605/7 Analysis Batch: 720-78605 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09231025.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/23/2010 2116 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/23/2010 2116 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 94 94 64-128 0.02 20 <br /> 1,1-Dichloroethane 97 97 70-130 0.1 20 <br /> Dichlorodifluoromethane 72 72 42-188 0.6 20 <br /> Vinyl chloride 90 90 65-156 0.2 20 <br /> Chloroethane 94 94 62-138 0.6 20 <br /> Trichlorofluoromethane 104 107 74-146 3 20 <br /> Methylene Chloride 96 98 73-147 1 20 <br /> trans-1,2-Dichloroethene 99 100 75-131 0.7 20 <br /> cis-1,2-Dichloroethene 102 104 70-130 2 20 <br /> Chloroform 101 100 70-130 0.3 20 <br /> 1,1,1-Trichloroethane 105 106 70-130 0.8 20 <br /> Carbon tetrachloride 105 106 77-146 1 20 <br /> 1,2-Dichloroethane 93 96 70-126 2 20 <br /> Trichloroethene 98 98 70-130 0.2 20 <br /> 1,2-Dichloropropane 101 100 70-130 0.9 20 <br /> Dichlorobromomethane 107 107 70-130 0.5 20 <br /> trans-1,3-Dichloropropene 105 107 70-130 3 20 <br /> cis-1,3-Dichloropropene 103 105 70-130 1 20 <br /> 1,1,2-Trichloroethane 104 106 86-135 2 20 <br /> Tetrachloroethene 93 92 70-130 0.8 20 <br /> Chlorodibromomethane 106 108 78-145 2 20 <br /> Chlorobenzene 98 98 70-130 0.4 20 <br /> Bromoform 103 110 68-136 6 20 <br /> 1,1,2,2-Tetrachloroethane 103 109 70-130 6 20 <br /> 1,3-Dichlorobenzene 96 97 70-130 0.3 20 <br /> 1,4-Dichlorobenzene 98 97 82-113 0.7 20 <br /> 1,2-Dichlorobenzene 96 96 70-130 0.5 20 <br /> Chloromethane 91 92 52-175 1 20 <br /> Bromomethane 99 99 43-151 0.8 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 95 94 42-162 0.9 20 <br /> EDB 97 103 70-130 5 20 <br /> 1,2,4-Trichlorobenzene 88 87 70-130 0.6 20 <br /> TestAmerica San Francisco Page 12 of 17 <br />