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Quality Control Results <br /> Client: Geomatrix Consultants Inc. Job Number: 720-9434-1 <br /> Matrix Spike/ Method: 8270C <br /> Matrix Spike Duplicate Recovery Report- Batch: 720-22612 Preparation: 3550B <br /> MS Lab Sample ID: 720-9434-2 Analysis Batch: 720-22668 Instrument ID: Latest Chemstation <br /> Client Matrix: Solid Prep Batch: 720-22612 Lab File ID: 061207013.D <br /> Dilution: 1.0 Initial Weight/Volume: 30.06 g <br /> Date Analyzed: 06/12/2007 1903 Final Weight/Volume: 1 mL <br /> Date Prepared: 06/12/2007 1458 Injection Volume: <br /> MSD Lab Sample ID: 720-9434-2 Analysis Batch: 720-22668 Instrument ID: Latest Chemstation <br /> Client Matrix: Solid Prep Batch: 720-22612 Lab File ID: 061207014.D <br /> Dilution: 1.0 Initial Weight/Volume: 30.14 g <br /> Date Analyzed: 06/12/2007 1929 Final Weight/Volume: 1 mL <br /> Date Prepared: 06/12/2007 1458 Injection Volume: <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> Naphthalene 70 70 21 - 133 0 35 <br /> Acenaphthene 69 71 40- 145 2 35 <br /> Acenaphthylene 75 80 33- 145 5 35 <br /> Fluorene 77 76 50- 121 2 35 <br /> Phenanthrene 70 81 10- 130 14 35 <br /> Anthracene 83 76 27- 133 9 35 <br /> Benzo[a]anthracene 68 87 33- 143 25 35 <br /> Chrysene 79 83 17- 168 5 35 <br /> Benzo[a]pyrene 74 82 17- 163 9 35 <br /> Benzo[b]fluoranthene 86 95 24- 159 10 35 <br /> Benzo[k]fluoranthene 83 85 11 - 162 3 35 <br /> Benzo[g,h,i]perylene 54 57 9-219 4 35 <br /> Indeno[1,2,3-cd]pyrene 63 67 9- 171 6 35 <br /> Fluoranthene 84 85 26- 137 1 35 <br /> Pyrene 84 124 52- 115 39 35 F <br /> Dibenz(a,h)anthracene 66 72 52- 115 8 35 <br /> Surrogate MS% Rec MSD % Rec Acceptance Limits <br /> 2-Fluorobiphenyl 75 77 30- 115 <br /> Terphenyl-d14 87 89 18- 137 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 74 of 85 06/18/2007 <br />