2010-12-17_REVISION - C1981019 (129)

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• APPENDIX F GEOLOGICAL PROCEDURES 2004 COLLOM EXPLORATION PROJECT SEPTEMBER UPDATE The following general procedures and protocols were prepared by the project team and apply to drill site work performed by geologists for the 2004 Collom Project. It also includes the handling and entry procedures for the drilling data. These protocols are subject to modifications and ideas for improvement should continue as the project progresses. Pilot Holes, Rotary Drilling & Chip Logging Pilot holes are planned at each site except at fully cored "geotech" sites. Pilot holes are geophysically logged for purposes of selecting spot core intervals. The pilot hole forms the basis of the data point and the subsequent core hole data will be assimilated into the pilot hole data point. The core hole is not planned to be logged. An exception may arise where coal seam thickness and depths are significantly different. In those cases a geophysical log may be needed for the core hole and both holes may be honored in the database. In some cases continuous and spot coring holes may be deepened by rotary drilling methods to • intercept the Trout Creek Sandstone or KM marker bed. Deepening could improve seam correlations and define other potential resources. Chip samples are collected at 5 -foot intervals by the drilling contractor and laid out in 100 foot or 200 foot rows to keep track of hole depth. The helper or geologist will wash the samples to remove drilling mud & soap prior to examination. The sample is then described and the rock type and pertinent modifiers recorded on the lithology description form. Color, hardness and, if applicable, grain size are the minimum items that are recorded. Weathering depth, based on visual examination, is a critical item that also needs to be recorded during the process. Items of interest, such as water inflow, hard zones, gas occurrences, etc., are also recorded on the form for each pilot hole. Chip samples are discarded unless otherwise directed. Core holes & Core Logging At each of the planned 39 sites either continuous or spot coring will be conducted. After the core is placed in the core tray by the drilling contractor, it is verified which is the top and bottom of the core. The amount of core "cut" by the driller and the amount of core present in the core tray is measured to determine recovery. The core is pieced back together and if needed, the core is cleaned of drilling mud. If there is core loss, the core is then distributed in the core tray based on discussions with the driller. An engineer tape measure (divided into • 10ths) is then laid next to the core at the proper interval for scale and the core is digitally photographed in one -foot intervals. A "header board" is prepared and NAPROJECTS\ACTIVE PROJECTSA 158520037 RioTimo C.11omPa ,it\DrA P—it Tut Tabl s MapPDFAExhibit,s \Exhibit 611— 7 - G-logy PYaFcasibilily Rq)orlWpputslic \Appuulix F - Proloco1A211114Ga11ogic Procalurcc_nvisaLdoo Page 1 Of 6 1/16/2009