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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-30534-1 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report- Batch: 720-78107 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-78107/5 Analysis Batch: 720-78107 Instrument ID: HP12 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09161018.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/16/2010 1548 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/16/2010 1548 <br /> LCSD Lab Sample ID: LCSD 720-78107/6 Analysis Batch: 720-78107 Instrument ID: HP12 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09161019.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/16/2010 1617 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/16/2010 1617 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 91 93 64-128 2 20 <br /> 1,1-Dichloroethane 99 99 70-130 0.3 20 <br /> Dichlorodifluoromethane 77 73 42-188 5 20 <br /> Vinyl chloride 103 102 65-156 1 20 <br /> Chloroethane 104 102 62-138 2 20 <br /> Trichlorofluoromethane 107 104 74-146 3 20 <br /> Methylene Chloride 93 92 73-147 0.8 20 <br /> trans-1,2-Dichloroethene 98 98 75-131 0.08 20 <br /> cis-1,2-Dichloroethene 106 105 70-130 0.5 20 <br /> Chloroform 105 104 70-130 0.9 20 <br /> 1,1,1-Trichloroethane 111 111 70-130 0.1 20 <br /> Carbon tetrachloride 114 115 77-146 0.7 20 <br /> 1,2-Dichloroethane 108 107 70-126 0.9 20 <br /> Trichloroethene 102 103 70-130 0.7 20 <br /> 1,2-Dichloropropane 99 100 70-130 0.9 20 <br /> Dichlorobromomethane 119 116 70-130 2 20 <br /> trans-1,3-Dichloropropene 120 119 70-130 0.8 20 <br /> cis-1,3-Dichloropropene 114 113 70-130 1 20 <br /> 1,1,2-Trichloroethane 106 104 86-135 2 20 <br /> Tetrachloroethene 104 104 70-130 0.2 20 <br /> Chlorodibromomethane 122 118 78-145 3 20 <br /> Chlorobenzene 94 94 70-130 0.08 20 <br /> Bromoform 108 108 68-136 0.08 20 <br /> 1,1,2,2-Tetrachloroethane 98 94 70-130 4 20 <br /> 1,3-Dichlorobenzene 99 98 70-130 1 20 <br /> 1,4-Dichlorobenzene 96 95 82-113 1 20 <br /> 1,2-Dichlorobenzene 97 97 70-130 0.5 20 <br /> Chloromethane 96 95 52-175 0.8 20 <br /> Bromomethane 106 104 43-151 3 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 90 92 42-162 2 20 <br /> EDB 110 109 70-130 0.7 20 <br /> 1,2,4-Trichlorobenzene 94 92 70-130 3 20 <br /> TestAmerica San Francisco Page 16 of 22 <br />