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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: 720-53444 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-53444/3 Analysis Batch: 720-53444 Instrument ID: Saturn 2K3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: d:\data\200907\070609\LS-Wj <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 07/06/2009 1314 Final Weight/Volume: 40 mL <br /> Date Prepared: 07/06/2009 1314 <br /> LCSD Lab Sample ID: LCSD 720-53444/2 Analysis Batch: 720-53444 Instrument ID: Saturn 2K3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: d:\data\200907\070609\LD-WA <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 07/06/2009 1345 Final Weight/Volume: 40 mL <br /> Date Prepared: 07/06/2009 1345 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 100 103 76-128 3 20 <br /> 1,1-Dichloroethane 96 98 80-126 2 20 <br /> Dichlorodifluoromethane 83 84 38-142 1 20 <br /> Vinyl chloride 96 94 58-147 2 20 <br /> Chloroethane 101 100 51 -149 1 20 <br /> Trichlorofluoromethane 93 95 62-136 2 20 <br /> Methylene Chloride 100 100 80-128 0 20 <br /> trans-1,2-Dichloroethene 95 98 80-125 3 20 <br /> cis-1,2-Dichloroethene 100 103 80-136 3 20 <br /> Chloroform 97 96 78-129 1 20 <br /> 1,1,1-Trichloroethane 106 105 74-135 0 20 <br /> Carbon tetrachloride 105 104 69-136 1 20 <br /> 1,2-Dichloroethane 95 94 70-133 2 20 <br /> Trichloroethene 110 108 72-138 2 20 <br /> 1,2-Dichloropropane 104 102 75-138 2 20 <br /> Dichlorobromomethane 97 98 74-140 1 20 <br /> trans-1,3-Dichloropropene 96 94 74-137 2 20 <br /> cis-1,3-Dichloropropene 105 106 72-148 1 20 <br /> 1,1,2-Trichloroethane 99 94 67-151 6 20 <br /> Tetrachloroethene 117 110 80-134 7 20 <br /> Chlorodibromomethane 104 100 68-137 5 20 <br /> Chlorobenzene 111 108 80-122 4 20 <br /> Bromoform 106 100 56-144 6 20 <br /> 1,1,2,2-Tetrachloroethane 88 86 72-146 2 20 <br /> 1,3-Dichlorobenzene 98 97 80-128 1 20 <br /> 1,4-Dichlorobenzene 106 100 80-122 6 20 <br /> 1,2-Dichlorobenzene 105 106 80-127 1 20 <br /> Chloromethane 91 94 52-136 3 20 <br /> Bromomethane 115 126 23-171 9 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 101 100 66-132 1 20 <br /> EDB 97 95 70-143 2 20 <br /> 1,2,4-Trichlorobenzene 79 83 70-143 4 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 20 of 25 <br />