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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-20910-1 <br /> Lab Control Sample/ Method: 8260B <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-53420 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-53420/3 Analysis Batch: 720-53420 Instrument ID: Saturn 2K3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: d:\data\200907\070309\LS-Wj <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 07/03/2009 1156 Final Weight/Volume: 40 mL <br /> Date Prepared: 07/03/2009 1156 <br /> LCSD Lab Sample ID: LCSD 720-53420/2 Analysis Batch: 720-53420 Instrument ID: Saturn 2K3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: d:\data\200907\070309\LD-WA <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 07/03/2009 1228 Final Weight/Volume: 40 mL <br /> Date Prepared: 07/03/2009 1228 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 102 105 76-128 3 20 <br /> 1,1-Dichloroethane 96 99 80-126 4 20 <br /> Dichlorodifluoromethane 88 89 38-142 1 20 <br /> Vinyl chloride 97 91 58-147 6 20 <br /> Chloroethane 102 102 51 -149 1 20 <br /> Trichlorofluoromethane 95 97 62-136 2 20 <br /> Methylene Chloride 104 105 80-128 1 20 <br /> trans-1,2-Dichloroethene 97 100 80-125 3 20 <br /> cis-1,2-Dichloroethene 102 104 80-136 2 20 <br /> Chloroform 94 96 78-129 2 20 <br /> 1,1,1-Trichloroethane 104 104 74-135 0 20 <br /> Carbon tetrachloride 102 105 69-136 3 20 <br /> 1,2-Dichloroethane 97 98 70-133 1 20 <br /> Trichloroethene 101 102 72-138 1 20 <br /> 1,2-Dichloropropane 101 102 75-138 1 20 <br /> Dichlorobromomethane 96 100 74-140 4 20 <br /> trans-1,3-Dichloropropene 94 97 74-137 3 20 <br /> cis-1,3-Dichloropropene 105 105 72-148 1 20 <br /> 1,1,2-Trichloroethane 100 109 67-151 9 20 <br /> Tetrachloroethene 108 106 80-134 1 20 <br /> Chlorodibromomethane 101 101 68-137 0 20 <br /> Chlorobenzene 108 107 80-122 1 20 <br /> Bromoform 106 106 56-144 0 20 <br /> 1,1,2,2-Tetrachloroethane 88 92 72-146 5 20 <br /> 1,3-Dichlorobenzene 99 94 80-128 5 20 <br /> 1,4-Dichlorobenzene 97 101 80-122 5 20 <br /> 1,2-Dichlorobenzene 105 110 80-127 5 20 <br /> Chloromethane 93 98 52-136 5 20 <br /> Bromomethane 114 124 23-171 8 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 102 104 66-132 1 20 <br /> EDB 97 97 70-143 0 20 <br /> 1,2,4-Trichlorobenzene 76 85 70-143 11 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 15 of 25 <br />