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Quality Control Results <br /> Client: Earth Tech, Inc. Job Number: 720-14778-1 <br /> Lab Control Spike/ Method: 8270C <br /> Lab Control Spike Duplicate Recovery Report-Batch: 720-36987 Preparation: 3510C <br /> LCS Lab Sample ID:LCS 720-36987/2-A Analysis Batch: 720-37170 Instrument ID: Sat 2K1 <br /> Client Matrix: Water Prep Batch: 720-36987 Lab File ID: d:\data\200806\062308\lcs( <br /> Dilution: 1.0 Units: ug/L Initial WeighUVolume: 1000 mL <br /> Date Analyzed: 06/23/2008 1227 Final Weight/Volume: 1 mL <br /> Date Prepared: 06/19/2008 1308 Injection Volume: 1.0 uL <br /> LCSD Lab Sample ID:LCSD 720-36987/3-A Analysis Batch: 720-37170 Instrument ID: Sat 2K1 <br /> Client Matrix: Water Prep Batch: 720-36987 Lab File ID: d:\data\200806\062308\LCS <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 1000 mL <br /> Date Analyzed: 06/23/2008 1301 Final Weight/Volume: 1 mL <br /> Date Prepared: 06/19/2008 1308 Injection Volume: 1.0 uL <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qua[ <br /> ' 2,4-Dinitrophenol 98 97 10-130 1 35 <br /> 4-Nitrophenol 61 52 1 -132 15 35 <br /> Dibenzofuran 80 74 10-130 8 35 <br /> 2,4-Dinitrotoluene 92 84 39- 139 10 35 <br /> 2,6-Dinitroto[uene 90 91 10-130 1 35 <br /> Diethyl phthalate 86 89 10-130 3 35 <br /> 4-Chlorophenyl phenyl ether 86 80 39-144 7 35 <br /> Fluorene 80 80 55- 111 0 35 <br /> 4-Nitroaniline 99 96 10-130 3 35 <br /> 2-Methyl-4,6-dinitrophenol 93 85 53-110 9 35 <br /> N-Nitrosodiphenylamine 88 85 14-170 3 35 <br /> 4-Bromophenyl phenyl ether 78 77 10- 130 1 35 <br /> Hexachlorobenzene 88 73 8-140 18 35 <br /> Pentachlorophenol 82 76 45-125 8 35 <br /> Phenanthrene 83 77 44-125 7 35 <br /> ' Anthracene 79 78 44-118 2 35 <br /> Di-n-butyl phthalate 85 81 9-111 5 35 <br /> Fluoranthene 88 79 43- 121 10 35 <br /> Pyrene 70 71 52- 115 2 35 <br /> Butyl benzyl phthalate 69 68 10- 139 2 35 <br /> 33-Dichlorobenzidine 67 67 9-212 0 35 <br /> Benzo[a]anthracene 71 71 42- 133 1 35 <br /> Bis(2-ethylhexyl)phthalate 73 72 29-136 1 35 <br /> Chrysene 70 68 42- 139 4 35 <br /> Di-n-octyl phthalate 72 72 10- 130 0 35 <br /> Benzo[b]fluoranthene 85 83 42- 140 3 35 <br /> Benzo[a]pyrene 80 78 32- 148 3 35 <br /> Benzo[k]fluoranthene 85 82 26- 145 3 35 <br /> Indeno[1,2,3-cd]pyrene 98 100 10- 150 1 35 <br /> Benzo[g,h,i]perylene 93 87 10- 140 7 35 <br /> ' Benzoic acid 49 41 10-130 19 35 <br /> Azobenzene 87 81 12-89 7 35 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 42 of 51 <br />