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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-29725-1 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report- Batch: 720-76071 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-76071/5 Analysis Batch: 720-76071 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 08101005.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 08/10/2010 1015 Final Weight/Volume: 10 mL <br /> Date Prepared: 08/10/2010 1015 <br /> LCSD Lab Sample ID: LCSD 720-76071/6 Analysis Batch: 720-76071 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 08101006.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 08/10/2010 1048 Final Weight/Volume: 10 mL <br /> Date Prepared: 08/10/2010 1048 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 75 78 64-128 5 20 <br /> 1,1-Dichloroethane 83 84 70-130 2 20 <br /> Dichlorodifluoromethane 118 121 42-188 3 20 <br /> Vinyl chloride 114 115 65-156 1 20 <br /> Chloroethane 121 123 62-138 1 20 <br /> Trichlorofluoromethane 116 119 74-146 2 20 <br /> Methylene Chloride 75 77 73-147 2 20 <br /> trans-1,2-Dichloroethene 80 84 75-131 4 20 <br /> cis-1,2-Dichloroethene 94 94 70-130 0 20 <br /> Chloroform 87 87 70-130 1 20 <br /> 1,1,1-Trichloroethane 84 87 70-130 3 20 <br /> Carbon tetrachloride 94 98 77-146 4 20 <br /> 1,2-Dichloroethane 90 91 70-126 1 20 <br /> Trichloroethene 91 94 70-130 3 20 <br /> 1,2-Dichloropropane 93 93 70-130 0 20 <br /> Dichlorobromomethane 100 100 70-130 0 20 <br /> trans-1,3-Dichloropropene 101 102 70-130 1 20 <br /> cis-1,3-Dichloropropene 105 105 70-130 0 20 <br /> 1,1,2-Trichloroethane 103 104 86-135 1 20 <br /> Tetrachloroethene 86 89 70-130 3 20 <br /> Chlorodibromomethane 107 106 78-145 0 20 <br /> Chlorobenzene 92 92 70-130 1 20 <br /> Bromoform 109 111 68-136 2 20 <br /> 1,1,2,2-Tetrachloroethane 103 107 70-130 4 20 <br /> 1,3-Dichlorobenzene 100 101 70-130 2 20 <br /> 1,4-Dichlorobenzene 98 100 82-113 3 20 <br /> 1,2-Dichlorobenzene 99 101 70-130 3 20 <br /> Chloromethane 122 122 52-175 0 20 <br /> Bromomethane 124 127 43-151 2 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 75 78 42-162 5 20 <br /> EDB 100 101 70-130 1 20 <br /> 1,2,4-Trichlorobenzene 106 110 70-130 4 20 <br /> TestAmerica San Francisco Page 62 of 79 <br />