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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: 720-22627 Preparation: 3550B <br /> LCS Lab Sample ID:LCS 720-22627/2-AA Analysis Batch: 720-22690 Instrument ID: Latest Chemstation <br /> Client Matrix: Solid Prep Batch: 720-22627 Lab File ID: 061307004.D <br /> Dilution: 1.0 Units: ug/Kg Initial Weight/Volume: 30.03 g <br /> Date Analyzed: 06/13/2007 1528 Final Weight/Volume: 1 mL <br /> Date Prepared: 06/12/2007 1836 Injection Volume: <br /> LCSD Lab Sample ID:LCSD 720-22627/3-AA Analysis Batch: 720-22690 Instrument ID: Latest Chemstation <br /> Client Matrix: Solid Prep Batch: 720-22627 Lab File ID: 061307005.D <br /> Dilution: 1.0 Units: ug/Kg Initial Weight/Volume: 30.08 g <br /> Date Analyzed: 06/13/2007 1555 Final Weight/Volume: 1 mL <br /> Date Prepared: 06/12/2007 1836 Injection Volume: <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Naphthalene 72 69 21 - 133 5 35 <br /> Acenaphthene 67 67 40- 145 0 35 <br /> Acenaphthylene 72 75 33- 145 4 35 <br /> Fluorene 74 77 50- 121 4 35 <br /> Phenanthrene 69 70 10- 130 1 35 <br /> Anthracene 81 82 27- 133 1 35 <br /> Benzo[a]anthracene 76 73 33- 143 3 35 <br /> Chrysene 81 82 17- 168 0 35 <br /> Benzo[a]pyrene 76 76 17- 163 0 35 <br /> Benzo[b]fluoranthene 77 78 24- 159 1 35 <br /> Benzo[k]fluoranthene 88 85 11 - 162 4 35 <br /> Benzo[g,h,i]perylene 74 73 9-219 1 35 <br /> Indeno[1,2,3-cd]pyrene 80 79 9- 171 1 35 <br /> Fluoranthene 83 82 26- 137 1 35 <br /> Pyrene 77 73 52- 115 6 35 <br /> Dibenz(a,h)anthracene 82 81 9- 171 2 35 <br /> Surrogate LCS% Rec LCSD % Rec Acceptance Limits <br /> 2-Fluorobiphenyl 77 66 30- 115 <br /> Terphenyl-d14 84 81 18- 137 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 76 of 85 06/18/2007 <br />