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Quality Control Results <br /> Client: Shaw Environmental & Infrastructure, Inc Job Number: 720-21697-1 <br /> Lab Control Sample/ Method: 8260B <br /> Lab Gontrol Sample Duplicate Recovery Report-Batch: 720-55128 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-55128/4 Analysis Batch: 720-55128 Instrument ID: Agilent 5973 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 08050904.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 08/05/2009 1243 Final Weight/Volume: 10 mL <br /> Date Prepared: 08/05/2009 1243 <br /> LCSD Lab Sample ID:LCSD 720-55128/5 Analysis Batch: 720-55128 Instrument ID: Agilent 5973 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 08050905,D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 08/05/2009 1314 Final Weight/Volume: 10 mL <br /> Date Prepared: 08/05/2009 1314 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 106 103 76-128 3 20 <br /> cis-1,2-Dichloroethene 115 114 80- 136 1 20 <br /> trans-1,2-Dichloroethene 101 97 80- 125 4 20 <br /> 1,2-Dichloropropane 108 110 75-138 2 20 <br /> cis-1,3-Dichloropropene 111 113 72-148 2 20 <br /> trans-1,3-Dichloropropene 108 112 74-137 4 20 <br /> Ethylbenzene 104 103 80-139 1 20 <br /> Hexachlorobutadiene 89 90 75-138 1 20 <br /> 2-Hexanone 136 144 60- 140 5 20 <br /> Isopropylbenzene 92 91 80-120 2 20 <br /> 4-Isopropyltoluene 101 100 73-148 0 20 <br /> Methylene Chloride 96 95 80-128 1 20 <br /> 4-Methyl-2-pentanone(MIBK) 125 131 40-168 4 20 <br /> Naphthalene 91 99 56-156 8 20 <br /> N-Propylbenzene 100 99 78- 144 1 20 <br /> Styrene 104 104 73-146 0 20 <br /> 1,1,1,2-Tetrachloroethane 107 108 80-128 1 20 <br /> 1,1,2,2-Tetrachloroethane 110 113 72-146 3 20 <br /> Tetrachloroethene 97 95 80-134 3 20 <br /> Toluene 99 98 80- 126 1 20 <br /> 1,2,3-Trichlorobenzene 90 95 66- 153 5 20 <br /> 1,2,4-Trichlorobenzene 92 94 70- 143 2 20 <br /> 1,1,1-Trichloroethane 104 102 74- 135 2 20 <br /> 1,1,2-Trichloroethane 105 107 67- 151 3 20 <br /> Trichloroethene 97 97 72- 138 0 20 <br /> Trichlorofluoromethane 88 86 62-136 2 20 <br /> 1,2,3-Trichloropropane 107 111 76- 142 5 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 91 89 66- 132 3 20 <br /> 1,2,4-Trimethylbenzene 106 105 74-151 1 20 <br /> 1,3,5-Trimethylbenzene 102 102 75-144 0 20 <br /> Vinyl acetate 102 103 40-173 1 20 <br /> Vinyl chloride 104 103 58-147 1 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 36 of 63 08/17/2009 <br />