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Quality Control Results <br /> Client: Shaw Environmental & Infrastructure, Inc Job Number: 720-21697-1 <br /> Lab Control Sample/ Met4od: 8260B <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-55224 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-55224/2 Analysis Batch: 720-55224 Instrument ID: Chenstation 3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 08050914.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 08/05/2009 1517 Final Weight/Volume: 10 mL <br /> Date Prepared: 08/05/2009 1517 <br /> LCSD Lab Sample ID:LCSD 720-55224/3 Analysis Batch: 720-55224 Instrument ID: Chenstation 3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 08050915.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 08/05/2009 1550 Final Weight/Volume: 10 mL <br /> Date Prepared: 08/05/2009 1550 <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qua] <br /> 1,1-Dichloroethene 110 111 76- 128 1 20 <br /> cis-1,2-Dich]oroethene 106 105 80- 136 1 20 <br /> trans-1,2-Dichloroethene 103 102 80- 125 1 20 <br /> 1,2-Dichloropropane 102 103 75- 138 1 20 <br /> cis-1,3-Dichloropropene 110 111 72- 148 1 20 <br /> trans-1,3-Dichloropropene 102 104 74-137 2 20 <br /> Ethylbenzene 106 105 80-139 1 20 <br /> Hexachlorobutadiene 93 94 75-138 2 20 <br /> 2-Hexanone 104 111 60-140 6 20 <br /> Isopropy]benzene 91 89 80-120 2 20 <br /> 4-Isopropyltoluene 103 102 73- 148 1 20 <br /> Methylene Chloride 99 100 80- 128 1 20 <br /> 4-Methyl-2-pentanone(MIBK) 102 107 40- 168 6 20 <br /> Naphthalene 97 100 56- 156 4 20 <br /> N-Propylbenzene 103 101 78- 144 2 20 <br /> Styrene 106 107 73-146 1 20 <br /> 1,1,1,2-Tetrachloroethane 118 119 80-128 1 20 <br /> 1,1,2,2-Tetrachloroethane 104 105 72-146 0 20 <br /> Tetrachloroethene 100 101 80-134 1 20 <br /> Toluene 103 101 80-126 2 20 <br /> 1,2,3-Trichlorobenzene 95 98 66-153 3 20 <br /> 1,2,4-Trichlorobenzene 90 92 70-143 2 20 <br /> 1,1,1-Trichloroethane 105 106 74-135 2 20 <br /> 1,1,2-Trichloroethane 102 106 67-151 3 20 <br /> Trichloroethene 104 107 72-138 3 20 <br /> Trichlorofluoromethane 100 101 62- 136 1 20 <br /> 1,2,3-Trichloropropane 105 109 76- 142 4 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 107 107 66- 132 0 20 <br /> 1,2,4-Trimethylbenzene 108 107 74- 151 1 20 <br /> 1,3,5-TrimethyI benzene 106 105 75-144 2 20 <br /> Vinyl acetate 81 65 40-173 21 20 <br /> Vinyl chloride 91 87 58-147 4 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 44 of 63 08/17/2009 <br />