POWER OF ATTORNEY


		I, Stephen G. Shank, hereby authorize
and designate each of Heidi M. Hoard, John S.
Livingston, Meg Grace Newell, Annette M. White, Amy C.
Seidel, Nicole Kroetsch and Tracy Hardy, signing singly, as my
true and lawful attorney-in-fact to:

	(1)	execute for and on my behalf, in my
capacity as an officer and/or director of Tennant
Company (the "Company"), the Form ID and Forms 3, 4 and
5 in accordance with Section 16(a) of the Securities
Exchange Act of 1934 (the "Exchange Act") and the rules
and regulations promulgated thereunder;

	(2)	do and perform any and all acts for and on
my behalf which may be necessary or desirable to
complete and execute any such Form ID and Form 3, 4 or
5 and timely file such form with the Securities and
Exchange Commission, any stock exchange or similar
authority, and the National Association of Securities
Dealers; and

	(3)	take any other action of any type
whatsoever in connection with the foregoing which, in
the opinion of such attorney-in-fact, may be to my
benefit, in my best interest, or legally required of
me, it being understood that the statements executed by
such attorney-in-fact on my behalf pursuant to this
Power of Attorney shall be in such form and shall
contain such terms and conditions as such
attorney-in-fact may approve in such attorney-in-fact's
discretion.

		I hereby further grant to each such
attorney-in-fact full power and authority to do and
perform any and every act and thing whatsoever
requisite, necessary, or proper to be done in the
exercise of any of the rights and powers herein
granted, as fully to all intents and purposes as I
might or could do if personally present, with full
power of substitutes or revocation, hereby ratifying
and confirming all that such attorney-in-fact, or such
attorney-in-fact's substitute or substitutes, shall
lawfully do or cause to be done by virtue of this Power
of Attorney and the rights and powers herein granted.
I hereby acknowledge that the foregoing
attorneys-in-fact, in serving in such capacity at my
request, are not assuming, nor is the Company assuming,
any of my responsibilities to comply with Section 16 of
the Exchange Act.

		This Power of Attorney shall remain in
full force and effect until I am no longer required to
file Forms 3, 4 and 5 with respect to my holdings of
and transactions in securities issued by the Company,
unless earlier revoked by me in a signed writing
delivered to the foregoing attorneys-in-fact.

		IN WITNESS WHEREOF, I have caused this
Power of Attorney to be duly executed as of this 3rd
day of May, 2007.




						/s/ Stephen G. Shank

E:\Corporate\Insider Trading\ex24shankPOA.txt