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Quality Control Results <br /> Client: Geomatrix Consultants Inc. Job Number: 720-9434-1 <br /> Lab Control Spike/ Method: 8270C <br /> Lab Control Spike Duplicate Recovery Report- Batch: 720-22612 Preparation: 3550B <br /> LCS Lab Sample ID:LCS 720-22612/2-AA Analysis Batch: 720-22668 Instrument ID: Latest Chemstation <br /> Client Matrix: Solid Prep Batch: 720-22612 Lab File ID: 061207009.D <br /> Dilution: 1.0 Units: ug/Kg Initial Weight/Volume: 30.03 g <br /> Date Analyzed: 06/12/2007 1701 Final Weight/Volume: 1 mL <br /> Date Prepared: 06/12/2007 1458 Injection Volume: <br /> LCSD Lab Sample ID:LCSD 720-22612/3-AA Analysis Batch: 720-22668 Instrument ID: Latest Chemstation <br /> Client Matrix: Solid Prep Batch: 720-22612 Lab File ID: 061207010.D <br /> Dilution: 1.0 Units: ug/Kg Initial Weight/Volume: 30.01 g <br /> Date Analyzed: 06/12/2007 1728 Final Weight/Volume: 1 mL <br /> Date Prepared: 06/12/2007 1458 Injection Volume: <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Naphthalene 68 60 21 - 133 12 35 <br /> Acenaphthene 66 63 40- 145 4 35 <br /> Acenaphthylene 70 68 33- 145 4 35 <br /> Fluorene 74 73 50- 121 1 35 <br /> Phenanthrene 70 70 10- 130 1 35 <br /> Anthracene 81 79 27- 133 3 35 <br /> Benzo[a]anthracene 71 73 33- 143 3 35 <br /> Chrysene 80 82 17- 168 3 35 <br /> Benzo[a]pyrene 74 76 17- 163 3 35 <br /> Benzo[b]fluoranthene 94 96 24- 159 2 35 <br /> Benzo[k]fluoranthene 79 78 11 - 162 1 35 <br /> Benzo[g,h,i]perylene 56 57 9-219 2 35 <br /> Indeno[1,2,3-cd]pyrene 65 67 9- 171 2 35 <br /> Fluoranthene 85 85 26- 137 1 35 <br /> Pyrene 84 85 52- 115 1 35 <br /> Dibenz(a,h)anthracene 68 70 9- 171 2 35 <br /> Surrogate LCS% Rec LCSD % Rec Acceptance Limits <br /> 2-Fluorobiphenyl 75 67 30- 115 <br /> Terphenyl-d14 90 90 18- 137 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 73 of 85 06/18/2007 <br />