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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-30685-1 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report- Batch: 720-78515 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-78515/5 Analysis Batch: 720-78515 Instrument ID: HP5 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 092210024.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/22/2010 2041 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/22/2010 2041 <br /> LCSD Lab Sample ID: LCSD 720-78515/6 Analysis Batch: 720-78515 Instrument ID: HP5 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 092210025.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/22/2010 2113 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/22/2010 2113 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 95 95 64-128 0.06 20 <br /> 1,1-Dichloroethane 99 99 70-130 0.3 20 <br /> Dichlorodifluoromethane 91 91 42-188 0.06 20 <br /> Vinyl chloride 95 95 65-156 0.5 20 <br /> Chloroethane 104 105 62-138 0.9 20 <br /> Trichlorofluoromethane 115 115 74-146 0.03 20 <br /> Methylene Chloride 95 95 73-147 0.6 20 <br /> trans-1,2-Dichloroethene 100 100 75-131 0.4 20 <br /> cis-1,2-Dichloroethene 107 108 70-130 1 20 <br /> Chloroform 100 100 70-130 0.5 20 <br /> 1,1,1-Trichloroethane 105 107 70-130 1 20 <br /> Carbon tetrachloride 108 109 77-146 1 20 <br /> 1,2-Dichloroethane 102 103 70-126 0.7 20 <br /> Trichloroethene 98 99 70-130 0.6 20 <br /> 1,2-Dichloropropane 105 106 70-130 0.8 20 <br /> Dichlorobromomethane 99 102 70-130 3 20 <br /> trans-1,3-Dichloropropene 100 101 70-130 0.6 20 <br /> cis-1,3-Dichloropropene 101 102 70-130 0.8 20 <br /> 1,1,2-Trichloroethane 112 112 86-135 0.4 20 <br /> Tetrachloroethene 100 100 70-130 0.03 20 <br /> Chlorodibromomethane 96 98 78-145 1 20 <br /> Chlorobenzene 97 97 70-130 0.2 20 <br /> Bromoform 86 87 68-136 1 20 <br /> 1,1,2,2-Tetrachloroethane 103 104 70-130 0.5 20 <br /> 1,3-Dichlorobenzene 95 95 70-130 0.2 20 <br /> 1,4-Dichlorobenzene 91 91 82-113 0.5 20 <br /> 1,2-Dichlorobenzene 94 94 70-130 0.07 20 <br /> Chloromethane 93 94 52-175 2 20 <br /> Bromomethane 100 100 43-151 0.2 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 93 92 42-162 1 20 <br /> EDB 108 109 70-130 0.6 20 <br /> 1,2,4-Trichlorobenzene 96 97 70-130 0.1 20 <br /> TestAmerica San Francisco Page 15 of 20 <br />