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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 Control 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 /> Methyl tert-butyl ether 97 100 66- 138 3 20 <br /> Acetone 128 130 60-140 2 20 <br /> Benzene 101 100 80- 130 1 20 <br /> Dichlorobromomethane 109 111 74- 140 1 20 <br /> Bromobenzene 96 98 80- 128 2 20 <br /> Chlorobromomethane 94 94 80- 126 0 20 <br /> Bromoform 81 83 56- 144 2 20 <br /> Bromomethane 104 107 23- 171 3 20 <br /> 2-Butanone(MEK) 110 114 60- 140 4 20 <br /> n-Butylbenzene 108 107 67-160 1 20 <br /> sec-Butylbenzene 107 106 80-144 1 20 <br /> tert-Butylbenzene 97 98 80-141 1 20 <br /> Carbon disulfide 98 95 38-158 3 20 <br /> Carbon tetrachloride 106 104 69-136 2 20 <br /> Chlorobenzene 95 96 80-122 0 20 <br /> Chloroethane 114 116 51 -149 2 20 <br /> Chloroform 98 99 78-129 2 20 <br /> Chloromethane 112 113 52- 136 1 20 <br /> 2-Chlorotoluene 103 103 76- 142 0 20 <br /> 4-Chlorotoluene 104 103 78-140 1 20 <br /> Chlorodibromomethane 89 92 68- 137 3 20 <br /> 1,2-Dichlorobenzene 100 102 80-127 2 20 <br /> 1,3-Dichlorobenzene 100 101 80-128 1 20 <br /> 1,4-Dichlorobenzene 98 99 80- 122 2 20 <br /> 1,3-Dichloropropane 103 105 77- 140 2 20 <br /> 1,1-Dichloropropene 106 103 76- 140 3 20 <br /> 1,2-Dibromo-3-Chloropropane 79 83 64- 136 4 20 <br /> Ethylene Dibromide 107 109 70- 143 2 20 <br /> Dibromomethane 99 105 74- 137 6 20 <br /> Dichlorodifluoromethane 92 94 38-142 2 20 <br /> 1,1-Dichloroethane 108 107 80-126 1 20 <br /> 1,2-Dichloroethane 109 112 70-133 2 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> 1estAmerica San Francisco Page 35 of 63 08/17/2009 <br />