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Quality Control Results <br /> Client: Geomatrix Consultants Inc. Job Number: 720-9415-1 <br /> Lab Control Spike/ Method: 8270C <br /> Lab Control Spike Duplicate Recovery Report- Batch: 720-22459 Preparation: 3550B <br /> LCS Lab Sample ID:LCS 720-22459/2-AA Analysis Batch: 720-22505 Instrument ID: Latest Chemstation <br /> Client Matrix: Solid Prep Batch: 720-22459 Lab File ID: 060807003.D <br /> Dilution: 1.0 Units: ug/Kg Initial Weight/Volume: 30.00 g <br /> Date Analyzed: 06/08/2007 1229 Final Weight/Volume: 1 mL <br /> Date Prepared: 06/07/2007 1533 Injection Volume: <br /> LCSD Lab Sample ID:LCSD 720-22459/3-AA Analysis Batch: 720-22505 Instrument ID: Latest Chemstation <br /> Client Matrix: Solid Prep Batch: 720-22459 Lab File ID: 060807004.D <br /> Dilution: 1.0 Units: ug/Kg Initial Weight/Volume: 30.33 g <br /> Date Analyzed: 06/08/2007 1256 Final Weight/Volume: 1 mL <br /> Date Prepared: 06/07/2007 1533 Injection Volume: <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Naphthalene 66 52 21 - 133 26 35 <br /> Acenaphthene 66 53 40- 145 23 35 <br /> Acenaphthylene 72 57 33- 145 25 35 <br /> Fluorene 73 60 50- 121 21 35 <br /> Phenanthrene 64 56 10- 130 13 35 <br /> Anthracene 76 68 27- 133 12 35 <br /> Benzo[a]anthracene 73 66 33- 143 11 35 <br /> Chrysene 86 78 17- 168 11 35 <br /> Benzo[a]pyrene 80 72 17- 163 12 35 <br /> Benzo[b]fluoranthene 93 83 24- 159 12 35 <br /> Benzo[k]fluoranthene 81 72 11 - 162 12 35 <br /> Benzo[g,h,i]perylene 78 71 9-219 11 35 <br /> Indeno[1,2,3-cd]pyrene 86 77 9- 171 12 35 <br /> Fluoranthene 80 73 26- 137 9 35 <br /> Pyrene 83 73 52- 115 14 35 <br /> Dibenz(a,h)anthracene 88 79 9- 171 12 35 <br /> Surrogate LCS% Rec LCSD % Rec Acceptance Limits <br /> 2-Fluorobiphenyl 70 48 30- 115 <br /> Terphenyl-d14 91 80 18- 137 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 52 of 64 06/14/2007 <br />