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Quality Control Results <br /> Client: Earth Tech, Inc. Job Number: 720-14844-1 <br /> ' Lab Control Spike/ Method: 8270C <br /> Lab Control Spike Duplicate Recovery Report-Batch: 720-37157 Preparation: 3550B <br /> LCS Lab Sample ID:LCS 720-37157/2-A Analysis Batch: 720-37270 Instrument ID: Sat 2K1 <br /> Client Matrix: Solid Prep Batch: 720-37157 Lab File ID: d:\data\200806\062408\lcs <br /> Dilution: 1.0 Units: mg/Kg Initial Weight/Volume: 30.01 g <br /> Date Analyzed: 06/24/2008 1725 Final Weight/Volume: 1 mL <br /> Date Prepared: 06/23/2008 1506 Injection Volume: 1.0 uL <br /> LCSD Lab Sample ID:LCSD 720-37157/3-A Analysis Batch: 720-37270 Instrument ID: Sat 2K1 <br /> Client Matrix: Solid Prep Batch: 720-37157 Lab File ID: d:\data\200806\062408\lcsd <br /> Dilution: 1.0 Units: mg/Kg Initial Weight/Volume: 30.05 g <br /> ' Date Analyzed: 06/24/2008 1759 Final Weight/Volume: 1 mL <br /> Date Prepared: 06/23/2008 1506 Injection Volume: 1.0 uL <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Phenol 70 � 70 �48-90 1 _ 35 <br /> ' Bis(2-chloroethyl)ether 73 73 45-92 0 35 <br /> 2-Chlorophenol 66 67 48-93 2 35 <br /> 1,3-Dichlorobenzene 67 62 41 -91 8 35 <br /> ' 1,4-Dichlorobenzene 65 62 40-89 5 35 <br /> Benzyl alcohol 67 73 54-102 8 35 <br /> 1,2-Dichlorobenzene 74 70 44-92 6 35 <br /> 2-Methylphenol 69 70 54-97 2 35 <br /> ' 4-Methylphenol 71 71 50-95 1 35 <br /> N-Nitrosodi-n-propylamine 74 76 46-98 3 35 <br /> Hexachloroethane 70 66 44-94 6 35 <br /> Nitrobenzene 74 75 48-99 1 35 <br /> ' Isophorone 84 83 54- 100 1 35 <br /> 2-Nitrophenol 68 73 48-99 7 35 <br /> 2,4-Dimethylphenol 71 72 52-106 2 35 <br /> Bis(2-chloroethoxy)methane 77 79 46-97 2 35 <br /> 2,4-Dichlorophenol 76 77 49-100 2 35 <br /> 1,2,4-Trichlorobenzene 75 72 47-95 4 35 <br /> Naphthalene 66 69 44-92 5 35 <br /> 4-Chloroaniline 34 36 20-49 5 35 <br /> Hexachlorobutadiene 74 75 44-95 2 35 <br /> 4-Chloro-3-methylphenol 81 84 58-104 4 35 <br /> 2-Methylnaphthalene 72 80 49- 100 10 35 <br /> Hexachlorocyclopentadiene 84 82 42-132 3 35 <br /> 2,4,6-Trichlorophenol 76 79 45- 102 3 35 <br /> 2,4,5-Trichlorophenol 80 78 48-105 3 35 <br /> ' 2-Chloronaphthalene 84 78 52- 102 7 35 <br /> 2-Nitroaniline 75 81 54- 105 7 35 <br /> Dimethyl phthalate 98 92 64-119 7 35 <br /> Acenaphthylene 89 94 61 - 129 5 35 <br /> ' 3-Nitroaniline 79 85 50- 103 7 35 <br /> Acenaphthene 77 75 50-98 3 35 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> ' TestAmerica San Francisco Page 20 of 30 <br />