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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-31232-1 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report- Batch: 720-80482 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-80482/3 Analysis Batch: 720-80482 Instrument ID: HP4 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 102310004.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 10/23/2010 1110 Final Weight/Volume: 10 mL <br /> Date Prepared: 10/23/2010 1110 <br /> LCSD Lab Sample ID: LCSD 720-80482/4 Analysis Batch: 720-80482 Instrument ID: HP4 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 102310005.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 10/23/2010 1142 Final Weight/Volume: 10 mL <br /> Date Prepared: 10/23/2010 1142 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 98 98 64-128 0 20 <br /> 1,1-Dichloroethane 96 96 70-130 0 20 <br /> Dichlorodifluoromethane 131 125 33-125 5 20 <br /> Vinyl chloride 115 111 65-156 4 20 <br /> Chloroethane 121 117 62-138 3 20 <br /> Trichlorofluoromethane 114 108 74-146 5 20 <br /> Methylene Chloride 95 95 73-147 0 20 <br /> trans-1,2-Dichloroethene 100 100 75-131 0 20 <br /> cis-1,2-Dichloroethene 102 99 70-130 2 20 <br /> Chloroform 94 93 70-130 1 20 <br /> 1,1,1-Trichloroethane 91 90 70-130 2 20 <br /> Carbon tetrachloride 93 94 77-146 0 20 <br /> 1,2-Dichloroethane 90 89 70-126 2 20 <br /> Trichloroethene 96 100 70-130 4 20 <br /> 1,2-Dichloropropane 96 97 70-130 0 20 <br /> Dichlorobromomethane 100 101 70-130 1 20 <br /> trans-1,3-Dichloropropene 104 104 70-130 1 20 <br /> cis-1,3-Dichloropropene 102 102 70-130 0 20 <br /> 1,1,2-Trichloroethane 95 94 86-135 1 20 <br /> Tetrachloroethene 97 97 70-130 0 20 <br /> Chlorodibromomethane 100 98 78-145 2 20 <br /> Chlorobenzene 94 93 70-130 0 20 <br /> Bromoform 103 104 68-136 0 20 <br /> 1,1,2,2-Tetrachloroethane 98 96 70-130 2 20 <br /> 1,3-Dichlorobenzene 95 94 70-130 2 20 <br /> 1,4-Dichlorobenzene 93 91 82-113 2 20 <br /> 1,2-Dichlorobenzene 94 92 70-130 1 20 <br /> Chloromethane 110 111 52-175 1 20 <br /> Bromomethane 114 114 43-151 0 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 102 96 42-162 6 20 <br /> EDB 101 99 70-130 3 20 <br /> 1,2,4-Trichlorobenzene 89 87 70-130 2 20 <br /> TestAmerica San Francisco Page 44 of 77 <br />