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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-32186-1 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-83106 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-83106/5 Analysis Batch: 720-83106 Instrument ID: HP12 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12101027.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/10/2010 2049 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/10/2010 2049 <br /> LCSD Lab Sample ID: LCSD 720-83106/6 Analysis Batch: 720-83106 Instrument ID: HP12 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12101028.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/10/2010 2118 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/10/2010 2118 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 85 88 64-128 3 20 <br /> 1,1-Dichloroethane 99 100 70-130 2 20 <br /> Dichlorodifluoromethane 109 109 33-125 0 20 <br /> Vinyl chloride 115 112 65-156 3 20 <br /> Chloroethane 114 112 62-138 2 20 <br /> Trichlorofluoromethane 105 105 74-146 1 20 <br /> Methylene Chloride 99 101 73-147 2 20 <br /> trans-1,2-Dichloroethene 80 82 75-131 2 20 <br /> cis-1,2-Dichloroethene 108 110 70-130 2 20 <br /> Chloroform 104 105 70-130 1 20 <br /> 1,1,1-Trichloroethane 99 98 70-130 1 20 <br /> Carbon tetrachloride 100 99 77-146 1 20 <br /> 1,2-Dichloroethane 99 100 70-126 2 20 <br /> Trichloroethene 89 89 70-130 0 20 <br /> 1,2-Dichloropropane 99 99 70-130 1 20 <br /> Dichlorobromomethane 106 108 70-130 2 20 <br /> trans-1,3-Dichloropropene 103 105 83-140 2 20 <br /> cis-1,3-Dichloropropene 101 102 88-137 1 20 <br /> 1,1,2-Trichloroethane 102 105 82-128 3 20 <br /> Tetrachloroethene 86 85 70-130 1 20 <br /> Chlorodibromomethane 100 103 78-145 3 20 <br /> Chlorobenzene 98 99 70-130 0 20 <br /> Bromoform 103 106 68-136 3 20 <br /> 1,1,2,2-Tetrachloroethane 114 120 70-130 5 20 <br /> 1,3-Dichlorobenzene 99 98 70-130 0 20 <br /> 1,4-Dichlorobenzene 100 99 88-118 1 20 <br /> 1,2-Dichlorobenzene 96 96 70-130 0 20 <br /> Chloromethane 115 116 52-175 1 20 <br /> Bromomethane 117 112 43-151 4 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 87 85 42-162 3 20 <br /> EDB 97 100 70-130 4 20 <br /> 1,2,4-Trichlorobenzene 86 87 70-130 1 20 <br /> TestAmerica San Francisco Page 20 of 25 <br />