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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: 720-63481 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-63481/5 Analysis Batch: 720-63481 Instrument ID: Agilent 75MSD <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12240923.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/24/2009 2002 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/24/2009 2002 <br /> LCSD Lab Sample ID: LCSD 720-63481/6 Analysis Batch: 720-63481 Instrument ID: Agilent 75MSD <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12240924.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/24/2009 2033 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/24/2009 2033 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 112 113 70-130 1 20 <br /> 1,1-Dichloroethane 120 120 70-130 0 20 <br /> Dichlorodifluoromethane 158 156 38-142 1 20 <br /> Vinyl chloride 122 122 58-147 1 20 <br /> Chloroethane 120 120 51 -149 0 20 <br /> Trichlorofluoromethane 108 108 62-136 0 20 <br /> Methylene Chloride 121 121 71 -127 0 20 <br /> trans-1,2-Dichloroethene 101 101 80-125 1 20 <br /> cis-1,2-Dichloroethene 134 134 80-136 0 20 <br /> Chloroform 117 117 70-130 1 20 <br /> 1,1,1-Trichloroethane 117 118 74-135 1 20 <br /> Carbon tetrachloride 121 120 69-136 1 20 <br /> 1,2-Dichloroethane 126 126 70-133 0 20 <br /> Trichloroethene 113 110 72-138 3 20 <br /> 1,2-Dichloropropane 122 122 75-138 1 20 <br /> Dichlorobromomethane 124 125 74-140 0 20 <br /> trans-1,3-Dichloropropene 115 116 74-137 1 20 <br /> cis-1,3-Dichloropropene 124 124 72-148 0 20 <br /> 1,1,2-Trichloroethane 119 119 67-151 0 20 <br /> Tetrachloroethene 108 106 80-134 2 20 <br /> Chlorodibromomethane 113 113 68-137 0 20 <br /> Chlorobenzene 106 106 80-122 0 20 <br /> Bromoform 96 95 56-144 1 20 <br /> 1,1,2,2-Tetrachloroethane 106 111 72-146 5 20 <br /> 1,3-Dichlorobenzene 104 104 80-128 0 20 <br /> 1,4-Dichlorobenzene 103 103 80-122 0 20 <br /> 1,2-Dichlorobenzene 105 105 80-127 0 20 <br /> Chloromethane 146 146 52-136 0 20 <br /> Bromomethane 119 118 23-171 1 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 113 111 66-132 1 20 <br /> EDB 111 114 70-143 2 20 <br /> 1,2,4-Trichlorobenzene 98 96 70-143 2 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 25 of 40 <br />