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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-29638-1 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report- Batch: 720-75595 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-75595/5 Analysis Batch: 720-75595 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 08021024.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 08/02/2010 2138 Final Weight/Volume: 10 mL <br /> Date Prepared: 08/02/2010 2138 <br /> LCSD Lab Sample ID: LCSD 720-75595/6 Analysis Batch: 720-75595 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 08021025.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 08/02/2010 2210 Final Weight/Volume: 10 mL <br /> Date Prepared: 08/02/2010 2210 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 95 94 64-128 1 20 <br /> 1,1-Dichloroethane 93 95 70-130 1 20 <br /> Dichlorodifluoromethane 64 63 42-188 1 20 <br /> Vinyl chloride 93 92 65-156 1 20 <br /> Chloroethane 95 96 69-125 1 20 <br /> Trichlorofluoromethane 101 98 74-146 3 20 <br /> Methylene Chloride 93 93 73-147 0 20 <br /> trans-1,2-Dichloroethene 95 95 75-131 0 20 <br /> cis-1,2-Dichloroethene 99 99 70-130 0 20 <br /> Chloroform 92 93 70-130 1 20 <br /> 1,1,1-Trichloroethane 100 98 70-130 2 20 <br /> Carbon tetrachloride 104 103 77-146 1 20 <br /> 1,2-Dichloroethane 91 94 70-126 4 20 <br /> Trichloroethene 94 94 70-130 0 20 <br /> 1,2-Dichloropropane 92 94 70-130 1 20 <br /> Dichlorobromomethane 103 108 70-130 4 20 <br /> trans-1,3-Dichloropropene 102 108 70-130 5 20 <br /> cis-1,3-Dichloropropene 103 106 70-130 3 20 <br /> 1,1,2-Trichloroethane 91 96 86-135 6 20 <br /> Tetrachloroethene 92 90 70-130 2 20 <br /> Chlorodibromomethane 102 107 78-145 5 20 <br /> Chlorobenzene 93 92 70-130 1 20 <br /> Bromoform 99 106 68-136 7 20 <br /> 1,1,2,2-Tetrachloroethane 97 105 70-130 8 20 <br /> 1,3-Dichlorobenzene 97 97 70-130 0 20 <br /> 1,4-Dichlorobenzene 94 95 82-113 0 20 <br /> 1,2-Dichlorobenzene 93 96 70-130 2 20 <br /> Chloromethane 84 85 52-175 0 20 <br /> Bromomethane 88 88 43-151 0 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 92 89 42-162 4 20 <br /> EDB 93 99 70-130 6 20 <br /> 1,2,4-Trichlorobenzene 97 98 70-130 0 20 <br /> TestAmerica San Francisco Page 11 of 16 <br />