In July 2010, AMEC conducted a property site visit at the Blue River Tantalum-Niobium Project as part of their geology and data verification.

1. Commerce Blue River Ta-Nb Project
July 11-16, 2010 AMEC Site Visit:
Geology and Data Verification (Part 1 of 2)

2. Geology and Data Verification (July 2010)
Commerce 2010 Diamond Drilling
Left and Right: 2010 diamond drill operated by R.J. Beaupre Drilling Limited of Princeton B.C.
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3. Geology and Data Verification (July 2010)
Commerce 2010 Diamond Drilling
Left Rod sloop with HQ rods. North Thompson River valley in background.
Right: Fresh core with Ta-Nb rich carbonatite. The core was properly placed into the boxes.
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4. Geology and Data Verification (July 2010)
Commerce 2010 Diamond Drilling
Left: 2010 diamond drill core ready for transport from the drill to Commerce’s Blue River field office.
Right: Commerce’s Blue River field office core logging and sampling area.
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5. Geology and Data Verification (July 2010)
Core Sampling Process
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6. Geology and Data Verification (July 2010)
Specific Gravity Measurement Apparatus
The apparatus is used to measure the specific gravity using the water immersion method. A 20 cm piece of core is first
weighed dry on the triple beam scale, then weighed wet while immersed in relatively clean, room temperature water. Porous
core (fenite rocks) is sealed with an aerosol spray adhesive and then dried prior to immersion in in water to negate a high bias
in the determination. Note cardboard shims used to level the platform.
The formula used to calculate the SG is (dry core weight in air) / (dry core weight in air – core weight in water)
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7. Geology and Data Verification (July 2010)
Specific Gravity Check Assays
AMEC recommends to use the water immersion method for the 2010 density determination program.
Notes: QQ’ plots for two different field methods for measuring bulk density (y-axis) versus a wax immersion method at an independent umpire laboratory
(x-axis). All data is based on 39 data pairs from 20 cm long whole core samples. The umpire laboratory used a wax coating, water immersion
methodology.
Left: water displacement method versus umpire laboratory QQ’ plot.
Right: Non-wax coated samples with water immersion method versus the umpire laboratory QQ’ plot
The non-wax coated samples with SG determination by water immersion method correlates best with the umpire laboratory results (Right-side plot).
Abbreviations:
DEN2 = a water displacement method using a 2,000 mL ASTM certified graduated cylinder
SG3 = a non-wax coated sample using the water immersion method. Formula = weight dry / (water level after immersion – water level before immersion)
SG4 = a wax coated core sample and determination by the water immersion method. Formula = (weight in air) / (weight in air) – (weight in water)
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8. Geology and Data Verification (July 2010)
Specific Gravity Check Assays
AMEC recommends to use the water immersion method for the 2010 density determination program (Right-
side plot).
Notes: Scatter plots for two different field methods for measuring bulk density (y-axis) versus a wax immersion method at an independent umpire
laboratory (x-axis). All data is based on 39 data pairs from 20 cm long whole core samples. The umpire laboratory used a wax coating, water immersion
methodology.
Left: water displacement method versus umpire laboratory plot.
Right: Non-wax coated samples with water immersion method versus the umpire laboratory plot
The non-wax coated samples with SG determination by water immersion method correlates best with the umpire laboratory results (Right).
Abbreviations:
DEN2 = a water displacement method using a 2,000 mL ASTM certified graduated cylinder
SG3 = a non-wax coated sample using the water immersion method. Formula = weight dry / (water level after immersion – water level before immersion)
SG4 = a wax coated core sample and determination by the water immersion method. Formula = (weight in air) / (weight in air) – (weight in water)
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9. Geology and Data Verification (July 2010)
Core Storage Field at Valemount
The quansette hut at the Blue River field office can be locked, has power, and is a multi-purpose building.
Left: Pulp sample storage in labeled plastic pails.
Right: Coarse rejects are stored in their plastic sample bags and returned in rice bags and crates. Samples are stored prior
to shipping for analyses in this same building.
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10. Geology and Data Verification (July 2010)
Core Storage Field at Valemount
The core storage field is at Valemount, B.C. The core is stored on wood pallets. The area is open to the road and underlain
by dirt and grass. Security can be improved with fencing and fire hazard reduced by laying down gravel. A covered pole barn
or core racks will help maintain the longevity of selected holes.
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11. Geology and Data Verification (July 2010)
Commerce Legacy Drilling (2005 to 2009)
Left: Collar survey audit (hole F06-04 and F06-05). 4X4 wood posts have been inserted into the former hole where casing has been removed.
Right: Collar survey audit (hole F07-034). Casing has been left in place for some drill holes. Note the steel plate label that has been cemented
into the ground.
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12. Commerce Blue River Ta-Nb Project
Geology and Data Verification (July 2010)
End of Part 1,
Please go to Part 2 of 2.
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