technical report on the nechalacho deposit, thor lake project ...

CERTIFICATE OF QUALIFIED PERSON
I, William Mercer, P.Geol (NWT), P. Geo (ON), P. Geo (NS), as an author of this Technical
Report entitled “Technical Report on the Nechalacho Deposit, Thor Lake Project, Northwest
Territories, Canada”, prepared for Avalon Rare Metals Inc., and dated March 13, 2011, do
hereby certify that:
1. I am Vice President of Exploration with Avalon Rare Metals Inc., at Suite 1901, 130 Adelaide
Street West, Toronto, ON, M5H 3P5.
2. I am a graduate of Edinburgh University, Scotland, in 1968 with a Bachelor of Science
degree in Geology and of McMaster University, Hamilton, Ontario with a Doctor of
Philosophy in Geology in 1975.
3. I am registered as a Professional Geoscientist in the Province of Ontario (Registration #
186). I have worked as a geologist for a total of 37 years since my graduation. My relevant
experience for the purpose of the Technical Report is:
• Manage exploration programs, and advanced mineral property acquisitions for major
mining companies for over 30 years both in Canada and overseas;
• Supervise mineral exploration QAQC programs for major companies; and
• Prefeasibility and Feasibility Study geological work on international projects.
4. I have read the definition of "qualified person" set out in National Instrument 43-101 (NI 43-
101) and certify that by reason of my education, affiliation with a professional association (as
defined in NI 43-101) and past relevant work experience, I am a "qualified person" for the
purposes of NI 43-101.
5. I have visited the Thor Lake Property approximately once per month from 2007 to present,
and my most recent site visit was February 3, 2011 to February 4, 2011.
6. I am responsible for the overall preparation of the Technical Report.
7. I am not independent of the issuer applying the test set out in Section 1.4 of NI 43-101.
8. I have had extensive prior involvement with the Thor Lake Property that is the subject of the
Technical Report.
9. I have read NI 43-101, and the Technical Report has been prepared in compliance with NI
43-101 and Form 43-101F1.
10. As of the date of this certificate, to the best of my knowledge, information and belief, the
Technical Report contains all scientific and <strong>technical</strong> information that is required to be
disclosed to make the Technical Report not misleading.
Dated this 13 th day of March, 2011.
(Signed and Sealed)
WILLIAM MERCER, P. GEO
Technical Report 43-101 – March 13, 2011 Page 23-4
Prepared by Avalon Rare Metals Inc.