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Quality Control Results <br /> Client: Geomatrix Consultants Inc. Job Number: 720-9514-1 <br /> Matrix Spike/ Method: 8270C <br /> Matrix Spike Duplicate Recovery Report- Batch: 720-22947 Preparation: 3550B <br /> MS Lab Sample ID: 720-9514-65 Analysis Batch: 720-23002 Instrument ID: Latest Chemstation <br /> Client Matrix: Solid Prep Batch: 720-22947 Lab File ID: 062207010.D <br /> Dilution: 1.0 Initial Weight/Volume: 30.18 g <br /> Date Analyzed: 06/22/2007 1516 Final Weight/Volume: 1 mL <br /> Date Prepared: 06/21/2007 1601 Injection Volume: <br /> MSD Lab Sample ID: 720-9514-65 Analysis Batch: 720-23002 Instrument ID: Latest Chemstation <br /> Client Matrix: Solid Prep Batch: 720-22947 Lab File ID: 062207011.D <br /> Dilution: 1.0 Initial Weight/Volume: 30.11 g <br /> Date Analyzed: 06/22/2007 1542 Final Weight/Volume: 1 mL <br /> Date Prepared: 06/21/2007 1601 Injection Volume: <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> Naphthalene 67 72 21 - 133 7 35 <br /> Acenaphthene 66 64 40- 145 3 35 <br /> Acenaphthylene 74 72 33- 145 2 35 <br /> Fluorene 73 72 50- 121 2 35 <br /> Phenanthrene 74 82 10- 130 10 35 <br /> Anthracene 66 72 27- 133 10 35 <br /> Benzo[a]anthracene 80 81 33- 143 1 35 <br /> Chrysene 66 63 17- 168 4 35 <br /> Benzo[a]pyrene 70 68 17- 163 2 35 <br /> Benzo[b]fluoranthene 72 73 24- 159 2 35 <br /> Benzo[k]fluoranthene 68 63 11 - 162 7 35 <br /> Benzo[g,h,i]perylene 69 67 9-219 3 35 <br /> Indeno[1,2,3-cd]pyrene 75 72 9- 171 3 35 <br /> Fluoranthene 75 82 26- 137 9 35 <br /> Pyrene 76 75 52- 115 0 35 <br /> Dibenz(a,h)anthracene 66 64 52- 115 2 35 <br /> Surrogate MS% Rec MSD % Rec Acceptance Limits <br /> 2-Fluorobiphenyl 64 71 30- 115 <br /> Terphenyl-d14 79 77 18- 137 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 194 of 222 06/25/2007 <br />