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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: 720-22627 Preparation: 3550B <br /> MS Lab Sample ID: 720-9434-33 Analysis Batch: 720-22690 Instrument ID: Latest Chemstation <br /> Client Matrix: Solid Prep Batch: 720-22627 Lab File ID: 061307008.D <br /> Dilution: 1.0 Initial Weight/Volume: 30.24 g <br /> Date Analyzed: 06/13/2007 1716 Final Weight/Volume: 1 mL <br /> Date Prepared: 06/12/2007 1836 Injection Volume: <br /> MSD Lab Sample ID: 720-9434-33 Analysis Batch: 720-22690 Instrument ID: Latest Chemstation <br /> Client Matrix: Solid Prep Batch: 720-22627 Lab File ID: 061307009.D <br /> Dilution: 1.0 Initial Weight/Volume: 30.20 g <br /> Date Analyzed: 06/13/2007 1743 Final Weight/Volume: 1 mL <br /> Date Prepared: 06/12/2007 1836 Injection Volume: <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> Naphthalene 53 56 21 - 133 6 35 <br /> Acenaphthene 52 57 40- 145 9 35 <br /> Acenaphthylene 57 60 33- 145 6 35 <br /> Fluorene 59 62 50- 121 5 35 <br /> Phenanthrene 55 61 10- 130 10 35 <br /> Anthracene 66 72 27- 133 9 35 <br /> Benzo[a]anthracene 57 59 33- 143 3 35 <br /> Chrysene 65 69 17- 168 6 35 <br /> Benzo[a]pyrene 61 65 17- 163 6 35 <br /> Benzo[b]fluoranthene 63 65 24- 159 3 35 <br /> Benzo[k]fluoranthene 70 76 11 - 162 8 35 <br /> Benzo[g,h,i]perylene 57 61 9-219 7 35 <br /> Indeno[1,2,3-cd]pyrene 62 66 9- 171 7 35 <br /> Fluoranthene 66 72 26- 137 8 35 <br /> Pyrene 59 62 52- 115 5 35 <br /> Dibenz(a,h)anthracene 64 68 52- 115 7 35 <br /> Surrogate MS% Rec MSD % Rec Acceptance Limits <br /> 2-Fluorobiphenyl 55 60 30- 115 <br /> Terphenyl-d14 65 69 18- 137 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 77 of 85 06/18/2007 <br />