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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-30985-1 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report- Batch: 720-79691 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-79691/6 Analysis Batch: 720-79691 Instrument ID: CHMSV2 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 10121005.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 10/12/2010 1017 Final Weight/Volume: 10 mL <br /> Date Prepared: 10/12/2010 1017 <br /> LCSD Lab Sample ID: LCSD 720-79691/7 Analysis Batch: 720-79691 Instrument ID: CHMSV2 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 10121006.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 10/12/2010 1049 Final Weight/Volume: 10 mL <br /> Date Prepared: 10/12/2010 1049 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 100 101 64-128 1 20 <br /> 1,1-Dichloroethane 103 103 70-130 0 20 <br /> Dichlorodifluoromethane 93 93 33-125 0 20 <br /> Vinyl chloride 101 103 65-156 2 20 <br /> Chloroethane 109 109 62-138 0 20 <br /> Trichlorofluoromethane 122 124 74-146 1 20 <br /> Methylene Chloride 96 96 73-147 0 20 <br /> trans-1,2-Dichloroethene 98 99 75-131 1 20 <br /> cis-1,2-Dichloroethene 110 109 70-130 1 20 <br /> Chloroform 105 104 70-130 1 20 <br /> 1,1,1-Trichloroethane 114 112 70-130 1 20 <br /> Carbon tetrachloride 117 116 77-146 1 20 <br /> 1,2-Dichloroethane 110 106 70-126 4 20 <br /> Trichloroethene 101 101 70-130 1 20 <br /> 1,2-Dichloropropane 98 97 70-130 1 20 <br /> Dichlorobromomethane 115 112 70-130 2 20 <br /> trans-1,3-Dichloropropene 106 102 70-130 3 20 <br /> cis-1,3-Dichloropropene 102 100 70-130 2 20 <br /> 1,1,2-Trichloroethane 99 95 86-135 4 20 <br /> Tetrachloroethene 103 101 70-130 2 20 <br /> Chlorodibromomethane 113 108 78-145 4 20 <br /> Chlorobenzene 96 96 70-130 0 20 <br /> Bromoform 102 98 68-136 4 20 <br /> 1,1,2,2-Tetrachloroethane 103 100 70-130 3 20 <br /> 1,3-Dichlorobenzene 100 102 70-130 2 20 <br /> 1,4-Dichlorobenzene 97 98 82-113 1 20 <br /> 1,2-Dichlorobenzene 98 99 70-130 2 20 <br /> Chloromethane 114 113 52-175 1 20 <br /> Bromomethane 112 111 43-151 1 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 106 107 42-162 1 20 <br /> EDB 100 95 70-130 5 20 <br /> 1,2,4-Trichlorobenzene 101 102 70-130 1 20 <br /> TestAmerica San Francisco Page 18 of 23 <br />