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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-24852-1 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-63606 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-63606/5 Analysis Batch: 720-63606 Instrument ID: Chemtation 3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12290924.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/29/2009 2129 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/29/2009 2129 <br /> LCSD Lab Sample ID: LCSD 720-63606/6 Analysis Batch: 720-63606 Instrument ID: Chemtation 3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12290925.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/29/2009 2203 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/29/2009 2203 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 114 113 70-130 1 20 <br /> 1,1-Dichloroethane 114 114 70-130 0 20 <br /> Dichlorodifluoromethane 93 94 38-142 0 20 <br /> Vinyl chloride 124 128 58-147 3 20 <br /> Chloroethane 126 128 51 -149 2 20 <br /> Trichlorofluoromethane 108 105 62-136 3 20 <br /> Methylene Chloride 100 100 71 -127 1 20 <br /> trans-1,2-Dichloroethene 104 104 80-125 0 20 <br /> cis-1,2-Dichloroethene 126 127 80-136 1 20 <br /> Chloroform 114 115 70-130 1 20 <br /> 1,1,1-Trichloroethane 118 118 74-135 0 20 <br /> Carbon tetrachloride 119 119 69-136 1 20 <br /> 1,2-Dichloroethane 112 115 70-133 2 20 <br /> Trichloroethene 118 117 72-138 1 20 <br /> 1,2-Dichloropropane 110 113 75-138 3 20 <br /> Dichlorobromomethane 121 122 74-140 1 20 <br /> trans-1,3-Dichloropropene 118 121 74-137 3 20 <br /> cis-1,3-Dichloropropene 125 127 72-148 2 20 <br /> 1,1,2-Trichloroethane 113 114 67-151 1 20 <br /> Tetrachloroethene 114 114 80-134 0 20 <br /> Chlorodibromomethane 119 122 68-137 3 20 <br /> Chlorobenzene 110 109 80-122 1 20 <br /> Bromoform 98 100 56-144 2 20 <br /> 1,1,2,2-Tetrachloroethane 104 105 72-146 1 20 <br /> 1,3-Dichlorobenzene 105 105 80-128 0 20 <br /> 1,4-Dichlorobenzene 95 95 80-122 1 20 <br /> 1,2-Dichlorobenzene 104 105 80-127 1 20 <br /> Chloromethane 106 104 52-136 2 20 <br /> Bromomethane 127 128 23-171 1 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 118 114 66-132 3 20 <br /> EDB 114 117 70-143 2 20 <br /> 1,2,4-Trichlorobenzene 99 101 70-143 2 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 14 Of 26 <br />