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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-32205-1 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report- Batch: 720-83231 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-83231/7 Analysis Batch: 720-83231 Instrument ID: HP12 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12113026.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/13/2010 2046 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/13/2010 2046 <br /> LCSD Lab Sample ID: LCSD 720-83231/8 Analysis Batch: 720-83231 Instrument ID: HP12 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12113027.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/13/2010 2115 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/13/2010 2115 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 99 97 64-128 1 20 <br /> 1,1-Dichloroethane 104 104 70-130 0 20 <br /> Dichlorodifluoromethane 88 85 33-125 4 20 <br /> Vinyl chloride 105 101 65-156 4 20 <br /> Chloroethane 98 93 62-138 5 20 <br /> Trichlorofluoromethane 95 92 74-146 3 20 <br /> Methylene Chloride 100 100 73-147 0 20 <br /> trans-1,2-Dichloroethene 91 90 75-131 1 20 <br /> cis-1,2-Dichloroethene 115 115 70-130 0 20 <br /> Chloroform 107 109 70-130 1 20 <br /> 1,1,1-Trichloroethane 107 106 70-130 1 20 <br /> Carbon tetrachloride 111 110 77-146 1 20 <br /> 1,2-Dichloroethane 105 107 70-126 2 20 <br /> Trichloroethene 99 100 70-130 2 20 <br /> 1,2-Dichloropropane 104 106 70-130 2 20 <br /> Dichlorobromomethane 110 113 70-130 3 20 <br /> trans-1,3-Dichloropropene 110 112 83-140 2 20 <br /> cis-1,3-Dichloropropene 108 110 88-137 2 20 <br /> 1,1,2-Trichloroethane 107 109 82-128 2 20 <br /> Tetrachloroethene 98 99 70-130 1 20 <br /> Chlorodibromomethane 112 113 78-145 1 20 <br /> Chlorobenzene 102 103 70-130 1 20 <br /> Bromoform 114 114 68-136 0 20 <br /> 1,1,2,2-Tetrachloroethane 106 109 70-130 2 20 <br /> 1,3-Dichlorobenzene 102 103 70-130 1 20 <br /> 1,4-Dichlorobenzene 102 103 88-118 1 20 <br /> 1,2-Dichlorobenzene 99 101 70-130 1 20 <br /> Chloromethane 101 97 52-175 4 20 <br /> Bromomethane 98 94 43-151 4 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 101 96 42-162 5 20 <br /> EDB 106 107 70-130 1 20 <br /> 1,2,4-Trichlorobenzene 99 98 70-130 1 20 <br /> TestAmerica San Francisco Page 12 of 22 <br />