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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-29226-1 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report- Batch: 720-74355 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-74355/5 Analysis Batch: 720-74355 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 07101005.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 07/10/2010 1204 Final Weight/Volume: 10 mL <br /> Date Prepared: 07/10/2010 1204 <br /> LCSD Lab Sample ID: LCSD 720-74355/6 Analysis Batch: 720-74355 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 07101006.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 07/10/2010 1237 Final Weight/Volume: 10 mL <br /> Date Prepared: 07/10/2010 1237 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 95 98 64-128 3 20 <br /> 1,1-Dichloroethane 96 100 70-130 3 20 <br /> Dichlorodifluoromethane 78 79 42-188 1 20 <br /> Vinyl chloride 102 106 65-156 4 20 <br /> Chloroethane 100 103 69-125 2 20 <br /> Trichlorofluoromethane 104 104 74-146 0 20 <br /> Methylene Chloride 96 98 73-147 2 20 <br /> trans-1,2-Dichloroethene 95 99 75-131 4 20 <br /> cis-1,2-Dichloroethene 105 107 70-130 2 20 <br /> Chloroform 96 99 70-130 3 20 <br /> 1,1,1-Trichloroethane 98 101 70-130 3 20 <br /> Carbon tetrachloride 103 105 77-146 2 20 <br /> 1,2-Dichloroethane 104 99 70-126 5 20 <br /> Trichloroethene 94 96 70-130 3 20 <br /> 1,2-Dichloropropane 99 102 70-130 4 20 <br /> Dichlorobromomethane 109 112 70-130 2 20 <br /> trans-1,3-Dichloropropene 114 112 70-130 1 20 <br /> cis-1,3-Dichloropropene 111 113 70-130 2 20 <br /> 1,1,2-Trichloroethane 102 99 86-135 3 20 <br /> Tetrachloroethene 95 98 70-130 3 20 <br /> Chlorodibromomethane 111 111 78-145 0 20 <br /> Chlorobenzene 98 96 70-130 2 20 <br /> Bromoform 110 105 68-136 5 20 <br /> 1,1,2,2-Tetrachloroethane 108 101 70-130 8 20 <br /> 1,3-Dichlorobenzene 101 101 70-130 0 20 <br /> 1,4-Dichlorobenzene 100 98 82-113 2 20 <br /> 1,2-Dichlorobenzene 99 97 70-130 2 20 <br /> Chloromethane 100 105 52-175 5 20 <br /> Bromomethane 94 95 43-151 1 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 93 92 42-162 1 20 <br /> EDB 109 101 70-130 7 20 <br /> 1,2,4-Trichlorobenzene 103 102 70-130 0 20 <br /> TestAmerica San Francisco Page 30 of 36 07/21/2010 <br />