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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-20559-1 <br /> Lab Control Sample/ Method: 8260B <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-52803 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-52803/3 Analysis Batch: 720-52803 Instrument ID: Chemstation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 06220908.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 06/22/2009 0909 Final Weight/Volume: 10 mL <br /> Date Prepared: 06/22/2009 0909 <br /> LCSD Lab Sample ID: LCSD 720-52803/4 Analysis Batch: 720-52803 Instrument ID: Chemstation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 06220909.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 06/22/2009 0940 Final Weight/Volume: 10 mL <br /> Date Prepared: 06/22/2009 0940 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 93 93 76-128 1 20 <br /> 1,1-Dichloroethane 91 92 80-126 1 20 <br /> Dichlorodifluoromethane 91 89 38-142 2 20 <br /> Vinyl chloride 100 102 58-147 2 20 <br /> Chloroethane 95 93 51 -149 3 20 <br /> Trichlorofluoromethane 101 98 62-136 3 20 <br /> Methylene Chloride 90 89 80-128 1 20 <br /> trans-1,2-Dichloroethene 89 89 80-125 0 20 <br /> cis-1,2-Dichloroethene 98 97 80-136 1 20 <br /> Chloroform 96 97 78-129 0 20 <br /> 1,1,1-Trichloroethane 91 91 74-135 0 20 <br /> Carbon tetrachloride 95 96 69-136 0 20 <br /> 1,2-Dichloroethane 97 95 70-133 2 20 <br /> Trichloroethene 96 96 72-138 0 20 <br /> 1,2-Dichloropropane 96 96 75-138 1 20 <br /> Dichlorobromomethane 106 105 74-140 1 20 <br /> trans-1,3-Dichloropropene 107 103 74-137 4 20 <br /> cis-1,3-Dichloropropene 107 105 72-148 2 20 <br /> 1,1,2-Trichloroethane 114 108 67-151 5 20 <br /> Tetrachloroethene 97 95 80-134 2 20 <br /> Chlorodibromomethane 111 107 68-137 4 20 <br /> Chlorobenzene 107 108 80-122 1 20 <br /> Bromoform 92 86 56-144 7 20 <br /> 1,1,2,2-Tetrachloroethane 126 120 72-146 5 20 <br /> 1,3-Dichlorobenzene 111 113 80-128 1 20 <br /> 1,4-Dichlorobenzene 108 109 80-122 1 20 <br /> 1,2-Dichlorobenzene 111 112 80-127 1 20 <br /> Chloromethane 93 92 52-136 1 20 <br /> Bromomethane 102 102 23-171 0 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 97 95 66-132 2 20 <br /> EDB 110 105 70-143 5 20 <br /> 1,2,4-Trichlorobenzene 110 108 70-143 2 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 24 Of 31 <br />