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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: 720-63494 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-63494/5 Analysis Batch: 720-63494 Instrument ID: Agilent 75MSD <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12280905.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/28/2009 1119 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/28/2009 1119 <br /> LCSD Lab Sample ID: LCSD 720-63494/6 Analysis Batch: 720-63494 Instrument ID: Agilent 75MSD <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12280906.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/28/2009 1150 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/28/2009 1150 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 105 105 70-130 0 20 <br /> 1,1-Dichloroethane 114 114 70-130 0 20 <br /> Dichlorodifluoromethane 106 109 38-142 3 20 <br /> Vinyl chloride 115 111 58-147 3 20 <br /> Chloroethane 113 113 51 -149 0 20 <br /> Trichlorofluoromethane 114 110 62-136 3 20 <br /> Methylene Chloride 114 112 71 -127 1 20 <br /> trans-1,2-Dichloroethene 95 95 80-125 0 20 <br /> cis-1,2-Dichloroethene 128 127 80-136 0 20 <br /> Chloroform 113 111 70-130 2 20 <br /> 1,1,1-Trichloroethane 115 113 74-135 2 20 <br /> Carbon tetrachloride 116 115 69-136 0 20 <br /> 1,2-Dichloroethane 121 119 70-133 2 20 <br /> Trichloroethene 106 105 72-138 1 20 <br /> 1,2-Dichloropropane 114 113 75-138 0 20 <br /> Dichlorobromomethane 118 118 74-140 0 20 <br /> trans-1,3-Dichloropropene 107 107 74-137 1 20 <br /> cis-1,3-Dichloropropene 114 114 72-148 0 20 <br /> 1,1,2-Trichloroethane 111 111 67-151 0 20 <br /> Tetrachloroethene 105 102 80-134 3 20 <br /> Chlorodibromomethane 105 104 68-137 2 20 <br /> Chlorobenzene 101 100 80-122 2 20 <br /> Bromoform 88 91 56-144 4 20 <br /> 1,1,2,2-Tetrachloroethane 104 107 72-146 3 20 <br /> 1,3-Dichlorobenzene 106 104 80-128 2 20 <br /> 1,4-Dichlorobenzene 104 102 80-122 3 20 <br /> 1,2-Dichlorobenzene 105 104 80-127 2 20 <br /> Chloromethane 128 127 52-136 1 20 <br /> Bromomethane 113 112 23-171 1 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 108 107 66-132 2 20 <br /> EDB 103 104 70-143 1 20 <br /> 1,2,4-Trichlorobenzene 97 97 70-143 1 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 30 Of 40 <br />