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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-29145-1 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-74290 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-74290/5 Analysis Batch: 720-74290 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 07081020.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 07/08/2010 1945 Final Weight/Volume: 10 mL <br /> Date Prepared: 07/08/2010 1945 <br /> LCSD Lab Sample ID: LCSD 720-74290/6 Analysis Batch: 720-74290 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 07081021.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 07/08/2010 2017 Final Weight/Volume: 10 mL <br /> Date Prepared: 07/08/2010 2017 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 96 97 64-128 1 20 <br /> 1,1-Dichloroethane 95 95 70-130 0 20 <br /> Dichlorodifluoromethane 75 75 42-188 1 20 <br /> Vinyl chloride 99 100 65-156 1 20 <br /> Chloroethane 96 98 69-125 2 20 <br /> Trichlorofluoromethane 99 100 74-146 0 20 <br /> Methylene Chloride 95 97 73-147 2 20 <br /> trans-1,2-Dichloroethene 97 97 75-131 1 20 <br /> cis-1,2-Dichloroethene 102 103 70-130 0 20 <br /> Chloroform 95 94 70-130 0 20 <br /> 1,1,1-Trichloroethane 97 97 70-130 0 20 <br /> Carbon tetrachloride 101 101 77-146 0 20 <br /> 1,2-Dichloroethane 94 94 70-126 1 20 <br /> Trichloroethene 95 94 70-130 1 20 <br /> 1,2-Dichloropropane 97 97 70-130 0 20 <br /> Dichlorobromomethane 107 109 70-130 2 20 <br /> trans-1,3-Dichloropropene 109 108 70-130 2 20 <br /> cis-1,3-Dichloropropene 108 108 70-130 0 20 <br /> 1,1,2-Trichloroethane 97 96 86-135 1 20 <br /> Tetrachloroethene 96 96 70-130 0 20 <br /> Chlorodibromomethane 108 107 78-145 1 20 <br /> Chlorobenzene 94 94 70-130 0 20 <br /> Bromoform 103 101 68-136 2 20 <br /> 1,1,2,2-Tetrachloroethane 101 101 70-130 0 20 <br /> 1,3-Dichlorobenzene 99 100 70-130 1 20 <br /> 1,4-Dichlorobenzene 96 96 82-113 0 20 <br /> 1,2-Dichlorobenzene 95 96 70-130 1 20 <br /> Chloromethane 98 98 52-175 0 20 <br /> Bromomethane 90 91 43-151 1 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 94 94 42-162 0 20 <br /> EDB 99 98 70-130 1 20 <br /> 1,2,4-Trichlorobenzene 99 99 70-130 0 20 <br /> TestAmerica San Francisco Page 50 of 56 <br />