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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: 720-63623 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-63623/5 Analysis Batch: 720-63623 Instrument ID: Chemtation 3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12300905.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/30/2009 1102 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/30/2009 1102 <br /> LCSD Lab Sample ID: LCSD 720-63623/6 Analysis Batch: 720-63623 Instrument ID: Chemtation 3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12300906.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/30/2009 1136 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/30/2009 1136 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 109 109 70-130 0 20 <br /> 1,1-Dichloroethane 109 110 70-130 0 20 <br /> Dichlorodifluoromethane 109 120 38-142 9 20 <br /> Vinyl chloride 112 114 58-147 2 20 <br /> Chloroethane 123 126 51 -149 2 20 <br /> Trichlorofluoromethane 104 104 62-136 0 20 <br /> Methylene Chloride 96 96 71 -127 0 20 <br /> trans-1,2-Dichloroethene 99 100 80-125 1 20 <br /> cis-1,2-Dichloroethene 119 120 80-136 1 20 <br /> Chloroform 109 109 70-130 0 20 <br /> 1,1,1-Trichloroethane 111 113 74-135 1 20 <br /> Carbon tetrachloride 113 113 69-136 0 20 <br /> 1,2-Dichloroethane 108 110 70-133 1 20 <br /> Trichloroethene 112 112 72-138 0 20 <br /> 1,2-Dichloropropane 107 105 75-138 2 20 <br /> Dichlorobromomethane 115 115 74-140 0 20 <br /> trans-1,3-Dichloropropene 111 114 74-137 3 20 <br /> cis-1,3-Dichloropropene 118 118 72-148 0 20 <br /> 1,1,2-Trichloroethane 108 109 67-151 1 20 <br /> Tetrachloroethene 109 108 80-134 1 20 <br /> Chlorodibromomethane 112 115 68-137 2 20 <br /> Chlorobenzene 108 107 80-122 1 20 <br /> Bromoform 94 93 56-144 0 20 <br /> 1,1,2,2-Tetrachloroethane 104 105 72-146 1 20 <br /> 1,3-Dichlorobenzene 107 107 80-128 0 20 <br /> 1,4-Dichlorobenzene 97 96 80-122 1 20 <br /> 1,2-Dichlorobenzene 107 106 80-127 1 20 <br /> Chloromethane 105 105 52-136 0 20 <br /> Bromomethane 125 123 23-171 2 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 112 112 66-132 0 20 <br /> EDB 108 111 70-143 2 20 <br /> 1,2,4-Trichlorobenzene 103 100 70-143 3 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 21 Of 26 <br />