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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-30497-1 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-78060 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-78060/7 Analysis Batch: 720-78060 Instrument ID: HP12 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09151024.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/15/2010 2009 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/15/2010 2009 <br /> LCSD Lab Sample ID: LCSD 720-78060/8 Analysis Batch: 720-78060 Instrument ID: HP12 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09151025.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/15/2010 2039 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/15/2010 2039 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 98 94 64-128 5 20 <br /> 1,1-Dichloroethane 105 103 70-130 2 20 <br /> Dichlorodifluoromethane 92 89 42-188 4 20 <br /> Vinyl chloride 109 111 65-156 2 20 <br /> Chloroethane 109 108 62-138 1 20 <br /> Trichlorofluoromethane 113 109 74-146 4 20 <br /> Methylene Chloride 100 98 73-147 2 20 <br /> trans-1,2-Dichloroethene 104 101 75-131 3 20 <br /> cis-1,2-Dichloroethene 112 110 70-130 2 20 <br /> Chloroform 112 108 70-130 3 20 <br /> 1,1,1-Trichloroethane 118 111 70-130 6 20 <br /> Carbon tetrachloride 122 115 77-146 6 20 <br /> 1,2-Dichloroethane 115 112 70-126 2 20 <br /> Trichloroethene 109 105 70-130 4 20 <br /> 1,2-Dichloropropane 106 105 70-130 0.9 20 <br /> Dichlorobromomethane 126 122 70-130 3 20 <br /> trans-1,3-Dichloropropene 128 127 70-130 0.6 20 <br /> cis-1,3-Dichloropropene 122 121 70-130 0.9 20 <br /> 1,1,2-Trichloroethane 111 112 86-135 0.2 20 <br /> Tetrachloroethene 110 105 70-130 5 20 <br /> Chlorodibromomethane 129 126 78-145 2 20 <br /> Chlorobenzene 99 97 70-130 2 20 <br /> Bromoform 111 113 68-136 1 20 <br /> 1,1,2,2-Tetrachloroethane 95 97 70-130 2 20 <br /> 1,3-Dichlorobenzene 99 97 70-130 2 20 <br /> 1,4-Dichlorobenzene 97 95 82-113 2 20 <br /> 1,2-Dichlorobenzene 98 97 70-130 1 20 <br /> Chloromethane 104 103 52-175 1 20 <br /> Bromomethane 114 112 43-151 1 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 98 93 42-162 6 20 <br /> EDB 118 117 70-130 1 20 <br /> 1,2,4-Trichlorobenzene 97 93 70-130 4 20 <br /> TestAmerica San Francisco Page 18 of 24 <br />