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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-31709-1 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report- Batch: 720-81536 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-81536/5 Analysis Batch: 720-81536 Instrument ID: HP12 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 11101025.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 11/10/2010 2049 Final Weight/Volume: 10 mL <br /> Date Prepared: 11/10/2010 2049 <br /> LCSD Lab Sample ID: LCSD 720-81536/6 Analysis Batch: 720-81536 Instrument ID: HP12 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 11101026.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 11/10/2010 2121 Final Weight/Volume: 10 mL <br /> Date Prepared: 11/10/2010 2121 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 94 95 64-128 2 20 <br /> 1,1-Dichloroethane 101 101 70-130 0 20 <br /> Dichlorodifluoromethane 83 81 33-125 2 20 <br /> Vinyl chloride 92 94 65-156 1 20 <br /> Chloroethane 99 102 62-138 3 20 <br /> Trichlorofluoromethane 96 98 74-146 2 20 <br /> Methylene Chloride 107 108 73-147 1 20 <br /> trans-1,2-Dichloroethene 91 93 75-131 2 20 <br /> cis-1,2-Dichloroethene 116 117 70-130 1 20 <br /> Chloroform 104 105 70-130 1 20 <br /> 1,1,1-Trichloroethane 101 102 70-130 1 20 <br /> Carbon tetrachloride 98 99 77-146 1 20 <br /> 1,2-Dichloroethane 98 98 70-126 0 20 <br /> Trichloroethene 100 101 70-130 1 20 <br /> 1,2-Dichloropropane 107 107 70-130 0 20 <br /> Dichlorobromomethane 110 109 70-130 0 20 <br /> trans-1,3-Dichloropropene 118 119 91 -135 1 20 <br /> cis-1,3-Dichloropropene 119 120 88-137 1 20 <br /> 1,1,2-Trichloroethane 110 110 86-135 1 20 <br /> Tetrachloroethene 96 96 70-130 0 20 <br /> Chlorodibromomethane 110 110 78-145 0 20 <br /> Chlorobenzene 104 105 70-130 1 20 <br /> Bromoform 107 110 68-136 3 20 <br /> 1,1,2,2-Tetrachloroethane 113 112 70-130 1 20 <br /> 1,3-Dichlorobenzene 107 108 70-130 0 20 <br /> 1,4-Dichlorobenzene 108 107 88-118 1 20 <br /> 1,2-Dichlorobenzene 104 105 70-130 1 20 <br /> Chloromethane 107 107 52-175 1 20 <br /> Bromomethane 101 103 43-151 2 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 87 89 42-162 2 20 <br /> EDB 109 109 70-130 0 20 <br /> 1,2,4-Trichlorobenzene 110 108 70-130 2 20 <br /> TestAmerica San Francisco Page 26 of 38 <br />