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Quality Control Results <br /> Client: Geomatrix Consultants Inc. Job Number: 720-9514-1 <br /> Lab Control Spike/ Method: 8270C <br /> Lab Control Spike Duplicate Recovery Report- Batch: 720-22931 Preparation: 3550B <br /> LCS Lab Sample ID:LCS 720-22931/2-A Analysis Batch: 720-22968 Instrument ID: Latest Chemstation <br /> Client Matrix: Solid Prep Batch: 720-22931 Lab File ID: 062107004.D <br /> Dilution: 1.0 Units: ug/Kg Initial Weight/Volume: 30.15 g <br /> Date Analyzed: 06/21/2007 1606 Final Weight/Volume: 1 mL <br /> Date Prepared: 06/21/2007 1357 Injection Volume: <br /> LCSD Lab Sample ID:LCSD 720-22931/3-A Analysis Batch: 720-22968 Instrument ID: Latest Chemstation <br /> Client Matrix: Solid Prep Batch: 720-22931 Lab File ID: 062107005.D <br /> Dilution: 1.0 Units: ug/Kg Initial Weight/Volume: 30.27 g <br /> Date Analyzed: 06/21/2007 1633 Final Weight/Volume: 1 mL <br /> Date Prepared: 06/21/2007 1357 Injection Volume: <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Naphthalene 78 76 21 - 133 3 35 <br /> Acenaphthene 73 74 40- 145 0 35 <br /> Acenaphthylene 83 80 33- 145 4 35 <br /> Fluorene 84 82 50- 121 3 35 <br /> Phenanthrene 96 94 10- 130 2 35 <br /> Anthracene 80 80 27- 133 0 35 <br /> Benzo[a]anthracene 96 95 33- 143 1 35 <br /> Chrysene 71 72 17- 168 1 35 <br /> Benzo[a]pyrene 79 79 17- 163 1 35 <br /> Benzo[b]fluoranthene 78 76 24- 159 3 35 <br /> Benzo[k]fluoranthene 82 81 11 - 162 1 35 <br /> Benzo[g,h,i]perylene 82 82 9-219 1 35 <br /> Indeno[1,2,3-cd]pyrene 86 86 9- 171 1 35 <br /> Fluoranthene 94 93 26- 137 2 35 <br /> Pyrene 86 86 52- 115 0 35 <br /> Dibenz(a,h)anthracene 76 76 9- 171 1 35 <br /> Surrogate LCS% Rec LCSD % Rec Acceptance Limits <br /> 2-Fluorobiphenyl 87 75 30- 115 <br /> Terphenyl-d14 93 91 18- 137 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 190 of 222 06/25/2007 <br />