I, Willie Hamilton, P. Eng., am employed as a Senior Mining Engineer with AMEC Americas Limited.
This certificate applies to the technical report entitled “NI 43-101 Technical Report and Preliminary Assessment on the Young-
Davidson Property, Matachewan, Canada ” with an effective date of 1 April 2008 .
I am a member of Professional Engineers of Ontario. I graduated in 1988 from the University of Alberta with a Bachelor’s degree
in Mining Engineering (BSc.) and in 1990 from the University of Alberta with a Master’s degree in Mining Engineering (MSc.) .
I have practiced my profession for eighteen years. I have been directly involved in mine design and scheduling of open-pit
mines, equipment selection, material handling, long-range and short-range forecast .
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 fulfill the
requirements to be a “qualified person” for the purposes of NI 43-101 for this report.
I visited the Young Davidson Property between 5 May and 8 May, 2008. I am responsible for the preparation of Sections 18.1,
18.2, 18.11, 20.4, 20.6, 20.9 and 21.2 of the technical report entitled “NI 43-101 Technical Report and Preliminary Assessment on
the Young-Davidson Property, Matachewan, Canada ” dated 1 April, 2008 .
I am independent of Northgate Minerals Corporation as independence is described by Section 1.4 of NI 43–101.
I have read NI 43–101 and this report has been prepared in compliance with that Instrument.
As of the date of this certificate, to the best of my knowledge, information and belief, the technical report contains all scientific
and technical information that is required to be disclosed to make the technical report not misleading.
CERTIFICATE OF QUALIFIED PERSON
Willie Hamilton, P. Eng.
AMEC Americas Limited
2020 Winston Park Drive, Suite 700