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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-30557-1 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report- Batch: 720-78221 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-78221/5 Analysis Batch: 720-78221 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09171023.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/17/2010 2022 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/17/2010 2022 <br /> LCSD Lab Sample ID: LCSD 720-78221/6 Analysis Batch: 720-78221 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09171024.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/17/2010 2054 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/17/2010 2054 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 99 96 64-128 3 20 <br /> 1,1-Dichloroethane 101 99 70-130 1 20 <br /> Dichlorodifluoromethane 76 72 42-188 6 20 <br /> Vinyl chloride 93 91 65-156 2 20 <br /> Chloroethane 99 98 62-138 0.8 20 <br /> Trichlorofluoromethane 104 104 74-146 0.5 20 <br /> Methylene Chloride 101 100 73-147 1 20 <br /> trans-1,2-Dichloroethene 103 102 75-131 1 20 <br /> cis-1,2-Dichloroethene 108 105 70-130 2 20 <br /> Chloroform 103 101 70-130 2 20 <br /> 1,1,1-Trichloroethane 106 104 70-130 2 20 <br /> Carbon tetrachloride 109 107 77-146 2 20 <br /> 1,2-Dichloroethane 96 94 70-126 2 20 <br /> Trichloroethene 104 100 70-130 3 20 <br /> 1,2-Dichloropropane 106 103 70-130 3 20 <br /> Dichlorobromomethane 109 108 70-130 1 20 <br /> trans-1,3-Dichloropropene 107 104 70-130 3 20 <br /> cis-1,3-Dichloropropene 108 106 70-130 3 20 <br /> 1,1,2-Trichloroethane 106 103 86-135 3 20 <br /> Tetrachloroethene 98 95 70-130 3 20 <br /> Chlorodibromomethane 108 106 78-145 2 20 <br /> Chlorobenzene 103 101 70-130 1 20 <br /> Bromoform 106 102 68-136 3 20 <br /> 1,1,2,2-Tetrachloroethane 101 98 70-130 3 20 <br /> 1,3-Dichlorobenzene 102 99 70-130 3 20 <br /> 1,4-Dichlorobenzene 102 100 82-113 2 20 <br /> 1,2-Dichlorobenzene 101 99 70-130 2 20 <br /> Chloromethane 96 94 52-175 3 20 <br /> Bromomethane 101 100 43-151 0.8 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 98 95 42-162 4 20 <br /> EDB 101 97 70-130 4 20 <br /> 1,2,4-Trichlorobenzene 92 89 70-130 4 20 <br /> TestAmerica San Francisco Page 10 of 15 <br />