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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-32465-1 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report- Batch: 720-84089 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-84089/5 Analysis Batch: 720-84089 Instrument ID: HP4 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 123010008.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/30/2010 1000 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/30/2010 1000 <br /> LCSD Lab Sample ID: LCSD 720-84089/6 Analysis Batch: 720-84089 Instrument ID: HP4 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 123010009.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/30/2010 1032 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/30/2010 1032 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 96 99 64-128 4 20 <br /> 1,1-Dichloroethane 100 105 70-130 5 20 <br /> Dichlorodifluoromethane 77 77 33-125 0 20 <br /> Vinyl chloride 94 93 65-156 1 20 <br /> Chloroethane 107 109 62-138 2 20 <br /> Trichlorofluoromethane 106 105 74-146 2 20 <br /> Methylene Chloride 98 101 73-147 3 20 <br /> trans-1,2-Dichloroethene 92 95 75-131 3 20 <br /> cis-1,2-Dichloroethene 116 119 70-130 2 20 <br /> Chloroform 102 103 70-130 2 20 <br /> 1,1,1-Trichloroethane 100 102 70-130 2 20 <br /> Carbon tetrachloride 99 100 77-146 1 20 <br /> 1,2-Dichloroethane 95 97 70-126 2 20 <br /> Trichloroethene 104 106 70-130 2 20 <br /> 1,2-Dichloropropane 105 107 70-130 2 20 <br /> Dichlorobromomethane 106 107 70-130 1 20 <br /> trans-1,3-Dichloropropene 109 112 83-140 2 20 <br /> cis-1,3-Dichloropropene 112 115 88-137 2 20 <br /> 1,1,2-Trichloroethane 105 107 82-128 2 20 <br /> Tetrachloroethene 99 103 70-130 4 20 <br /> Chlorodibromomethane 103 106 78-145 3 20 <br /> Chlorobenzene 102 103 70-130 1 20 <br /> Bromoform 105 106 68-136 0 20 <br /> 1,1,2,2-Tetrachloroethane 106 107 70-130 1 20 <br /> 1,3-Dichlorobenzene 104 106 70-130 2 20 <br /> 1,4-Dichlorobenzene 98 99 83-116 1 20 <br /> 1,2-Dichlorobenzene 103 104 70-130 1 20 <br /> Chloromethane 101 102 52-175 2 20 <br /> Bromomethane 109 106 43-151 3 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 96 100 42-162 3 20 <br /> EDB 101 105 70-130 4 20 <br /> 1,2,4-Trichlorobenzene 104 106 70-130 2 20 <br /> TestAmerica San Francisco Page 26 of 32 <br />