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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: 720-52615 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-52615/3 Analysis Batch: 720-52615 Instrument ID: Chemstation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 06210903.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 06/21/2009 0931 Final Weight/Volume: 10 mL <br /> Date Prepared: 06/21/2009 0931 <br /> LCSD Lab Sample ID: LCSD 720-52615/4 Analysis Batch: 720-52615 Instrument ID: Chemstation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 06210904.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 06/21/2009 1002 Final Weight/Volume: 10 mL <br /> Date Prepared: 06/21/2009 1002 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 89 91 76-128 1 20 <br /> 1,1-Dichloroethane 88 90 80-126 2 20 <br /> Dichlorodifluoromethane 92 90 38-142 2 20 <br /> Vinyl chloride 105 106 58-147 2 20 <br /> Chloroethane 96 95 51 -149 1 20 <br /> Trichlorofluoromethane 97 96 62-136 1 20 <br /> Methylene Chloride 88 88 80-128 1 20 <br /> trans-1,2-Dichloroethene 85 87 80-125 2 20 <br /> cis-1,2-Dichloroethene 94 95 80-136 1 20 <br /> Chloroform 93 94 78-129 1 20 <br /> 1,1,1-Trichloroethane 86 87 74-135 1 20 <br /> Carbon tetrachloride 88 90 69-136 1 20 <br /> 1,2-Dichloroethane 95 95 70-133 0 20 <br /> Trichloroethene 95 95 72-138 0 20 <br /> 1,2-Dichloropropane 93 94 75-138 0 20 <br /> Dichlorobromomethane 99 100 74-140 1 20 <br /> trans-1,3-Dichloropropene 99 94 74-137 5 20 <br /> cis-1,3-Dichloropropene 101 99 72-148 2 20 <br /> 1,1,2-Trichloroethane 110 105 67-151 4 20 <br /> Tetrachloroethene 91 91 80-134 0 20 <br /> Chlorodibromomethane 102 98 68-137 4 20 <br /> Chlorobenzene 104 105 80-122 0 20 <br /> Bromoform 80 76 56-144 4 20 <br /> 1,1,2,2-Tetrachloroethane 123 122 72-146 1 20 <br /> 1,3-Dichlorobenzene 108 109 80-128 0 20 <br /> 1,4-Dichlorobenzene 106 106 80-122 0 20 <br /> 1,2-Dichlorobenzene 108 108 80-127 0 20 <br /> Chloromethane 93 92 52-136 1 20 <br /> Bromomethane 105 103 23-171 3 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 91 91 66-132 0 20 <br /> EDB 106 101 70-143 5 20 <br /> 1,2,4-Trichlorobenzene 105 102 70-143 3 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 19 Of 31 <br />