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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-29145-1 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-74157 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-74157/5 Analysis Batch: 720-74157 Instrument ID: CHMSV2 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 07061023.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 07/06/2010 2201 Final Weight/Volume: 10 mL <br /> Date Prepared: 07/06/2010 2201 <br /> LCSD Lab Sample ID: LCSD 720-74157/6 Analysis Batch: 720-74157 Instrument ID: CHMSV2 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 07061024.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 07/06/2010 2233 Final Weight/Volume: 10 mL <br /> Date Prepared: 07/06/2010 2233 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 98 98 64-128 0 20 <br /> 1,1-Dichloroethane 97 96 70-130 1 20 <br /> Dichlorodifluoromethane 79 77 42-188 3 20 <br /> Vinyl chloride 92 92 65-156 0 20 <br /> Chloroethane 101 100 69-125 0 20 <br /> Trichlorofluoromethane 110 109 74-146 1 20 <br /> Methylene Chloride 110 108 73-147 2 20 <br /> trans-1,2-Dichloroethene 99 100 75-131 1 20 <br /> cis-1,2-Dichloroethene 102 100 70-130 2 20 <br /> Chloroform 98 96 70-130 2 20 <br /> 1,1,1-Trichloroethane 113 113 70-130 0 20 <br /> Carbon tetrachloride 121 122 77-146 0 20 <br /> 1,2-Dichloroethane 96 93 70-126 3 20 <br /> Trichloroethene 100 99 70-130 0 20 <br /> 1,2-Dichloropropane 99 98 70-130 1 20 <br /> Dichlorobromomethane 118 117 70-130 1 20 <br /> trans-1,3-Dichloropropene 115 113 70-130 2 20 <br /> cis-1,3-Dichloropropene 118 115 70-130 3 20 <br /> 1,1,2-Trichloroethane 105 102 86-135 3 20 <br /> Tetrachloroethene 94 93 70-130 1 20 <br /> Chlorodibromomethane 124 121 78-145 3 20 <br /> Chlorobenzene 94 93 70-130 0 20 <br /> Bromoform 112 112 68-136 1 20 <br /> 1,1,2,2-Tetrachloroethane 96 95 70-130 1 20 <br /> 1,3-Dichlorobenzene 94 94 70-130 0 20 <br /> 1,4-Dichlorobenzene 94 93 82-113 1 20 <br /> 1,2-Dichlorobenzene 95 94 70-130 1 20 <br /> Chloromethane 94 93 52-175 1 20 <br /> Bromomethane 103 103 43-151 0 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 99 98 42-162 2 20 <br /> EDB 109 106 70-130 3 20 <br /> 1,2,4-Trichlorobenzene 90 89 70-130 1 20 <br /> TestAmerica San Francisco Page 35 of 56 <br />