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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-29226-1 <br /> Lab Control Sample/ Method: 8260B/CA_LUFTMS <br /> Lab Control Sample Duplicate Recovery Report- Batch: 720-74352 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-74352/5 Analysis Batch: 720-74352 Instrument ID: HP5 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 071010006.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 07/10/2010 1514 Final Weight/Volume: 10 mL <br /> Date Prepared: 07/10/2010 1514 <br /> LCSD Lab Sample ID: LCSD 720-74352/6 Analysis Batch: 720-74352 Instrument ID: HP5 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 071010007.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 07/10/2010 1546 Final Weight/Volume: 10 mL <br /> Date Prepared: 07/10/2010 1546 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 94 93 64-128 0 20 <br /> 1,1-Dichloroethane 90 90 70-130 1 20 <br /> Dichlorodifluoromethane 67 65 42-188 3 20 <br /> Vinyl chloride 84 82 65-156 1 20 <br /> Chloroethane 83 83 69-125 1 20 <br /> Trichlorofluoromethane 99 96 74-146 3 20 <br /> Methylene Chloride 99 96 73-147 2 20 <br /> trans-1,2-Dichloroethene 93 92 75-131 1 20 <br /> cis-1,2-Dichloroethene 99 96 70-130 3 20 <br /> Chloroform 91 89 70-130 2 20 <br /> 1,1,1-Trichloroethane 98 95 70-130 3 20 <br /> Carbon tetrachloride 106 102 77-146 3 20 <br /> 1,2-Dichloroethane 93 89 70-126 5 20 <br /> Trichloroethene 95 93 70-130 2 20 <br /> 1,2-Dichloropropane 96 95 70-130 1 20 <br /> Dichlorobromomethane 113 108 70-130 4 20 <br /> trans-1,3-Dichloropropene 106 101 70-130 5 20 <br /> cis-1,3-Dichloropropene 112 109 70-130 3 20 <br /> 1,1,2-Trichloroethane 103 98 86-135 5 20 <br /> Tetrachloroethene 93 91 70-130 2 20 <br /> Chlorodibromomethane 107 103 78-145 4 20 <br /> Chlorobenzene 94 93 70-130 0 20 <br /> Bromoform 107 103 68-136 4 20 <br /> 1,1,2,2-Tetrachloroethane 96 92 70-130 5 20 <br /> 1,3-Dichlorobenzene 94 94 70-130 0 20 <br /> 1,4-Dichlorobenzene 91 91 82-113 0 20 <br /> 1,2-Dichlorobenzene 91 90 70-130 1 20 <br /> Chloromethane 81 80 52-175 1 20 <br /> Bromomethane 87 86 43-151 2 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 91 89 42-162 2 20 <br /> EDB 103 98 70-130 5 20 <br /> 1,2,4-Trichlorobenzene 101 101 70-130 0 20 <br /> TestAmerica San Francisco Page 25 of 36 07/21/2010 <br />