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Quality Control Results <br /> Client: Geomatrix Consultants Inc. Job Number: 720-10473-1 <br /> Lab Control Spike/ Method: 8270C <br /> Lab Control Spike Duplicate Recovery Report- Batch: 720-25299 Preparation: 3510C <br /> LCS Lab Sample ID:LCS 720-25299/2-A Analysis Batch: 720-25473 Instrument ID: Latest Chemstation <br /> Client Matrix: Water Prep Batch: 720-25299 Lab File ID: 082807006.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 1000 mL <br /> Date Analyzed: 08/28/2007 1109 Final Weight/Volume: 1 mL <br /> Date Prepared: 08/27/2007 1039 Injection Volume: <br /> LCSD Lab Sample ID:LCSD 720-25299/3-A Analysis Batch: 720-25473 Instrument ID: Latest Chemstation <br /> Client Matrix: Water Prep Batch: 720-25299 Lab File ID: 082807007.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 1000 mL <br /> Date Analyzed: 08/28/2007 1130 Final Weight/Volume: 1 mL <br /> Date Prepared: 08/27/2007 1039 Injection Volume: <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Naphthalene 83 77 36- 119 8 35 <br /> Acenaphthene 80 73 35- 100 10 30 <br /> Acenaphthylene 87 80 36- 104 8 35 <br /> Fluorene 81 74 42- 106 8 35 <br /> Phenanthrene 80 74 44- 125 8 35 <br /> Anthracene 90 87 45- 107 3 35 <br /> Benzo[a]anthracene 85 81 44- 111 5 35 <br /> Chrysene 91 87 45- 109 5 35 <br /> Benzo[a]pyrene 90 87 44- 128 4 35 <br /> Benzo[b]fluoranthene 89 90 44- 130 0 35 <br /> Benzo[k]fluoranthene 96 88 46- 137 9 35 <br /> Benzo[g,h,i]perylene 87 83 49- 140 5 35 <br /> Indeno[1,2,3-cd]pyrene 90 86 10- 150 6 35 <br /> Fluoranthene 93 87 43- 121 6 35 <br /> Pyrene 93 89 52- 115 5 35 <br /> Dibenz(a,h)anthracene 91 86 10- 130 5 35 <br /> Surrogate LCS% Rec LCSD % Rec Acceptance Limits <br /> 2-Fluorobiphenyl 89 82 22- 100 <br /> Terphenyl-d14 100 96 23- 109 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 34 of 50 09/10/2007 <br />