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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-24805-1 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-63441 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-63441/3 Analysis Batch: 720-63441 Instrument ID: ChemStation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12230920.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/23/2009 1845 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/23/2009 1845 <br /> LCSD Lab Sample ID: LCSD 720-63441/4 Analysis Batch: 720-63441 Instrument ID: ChemStation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12230921.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/23/2009 1919 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/23/2009 1919 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 112 110 70-130 2 20 <br /> 1,1-Dichloroethane 103 103 70-130 1 20 <br /> Dichlorodifluoromethane 125 126 38-142 1 20 <br /> Vinyl chloride 109 109 58-147 0 20 <br /> Chloroethane 104 105 51 -149 1 20 <br /> Trichlorofluoromethane 109 113 62-136 3 20 <br /> Methylene Chloride 127 127 71 -127 0 20 <br /> trans-1,2-Dichloroethene 101 105 80-125 3 20 <br /> cis-1,2-Dichloroethene 117 118 80-136 0 20 <br /> Chloroform 104 106 70-130 2 20 <br /> 1,1,1-Trichloroethane 105 108 74-135 3 20 <br /> Carbon tetrachloride 106 109 69-136 3 20 <br /> 1,2-Dichloroethane 104 100 70-133 4 20 <br /> Trichloroethene 110 115 72-138 5 20 <br /> 1,2-Dichloropropane 107 107 75-138 0 20 <br /> Dichlorobromomethane 112 111 74-140 1 20 <br /> trans-1,3-Dichloropropene 101 101 74-137 0 20 <br /> cis-1,3-Dichloropropene 113 114 72-148 1 20 <br /> 1,1,2-Trichloroethane 113 112 67-151 0 20 <br /> Tetrachloroethene 108 112 80-134 4 20 <br /> Chlorodibromomethane 112 114 68-137 2 20 <br /> Chlorobenzene 102 103 80-122 1 20 <br /> Bromoform 104 102 56-144 2 20 <br /> 1,1,2,2-Tetrachloroethane 105 98 72-146 6 20 <br /> 1,3-Dichlorobenzene 110 111 80-128 0 20 <br /> 1,4-Dichlorobenzene 101 104 80-122 3 20 <br /> 1,2-Dichlorobenzene 106 108 80-127 2 20 <br /> Chloromethane 105 105 52-136 0 20 <br /> Bromomethane 109 110 23-171 1 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 111 113 66-132 2 20 <br /> EDB 109 106 70-143 3 20 <br /> 1,2,4-Trichlorobenzene 97 99 70-143 2 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 15 of 40 <br />