CONFIRMING STATEMENT

	This Statement confirms that the undersigned, Leo Grohowski,
has authorized and designated Katherine M. Cain to execute and file on
the undersigned's behalf all Forms 3, 4, and 5 (including any amendments
thereto) that the undersigned may be required to file with the U.S.
Securities and Exchange Commission as a result of the undersigned's
ownership of or transactions in securities of Mellon Optima L/S Strategy
Fund, LLC (the "Fund") or as a result of the undersigned's position with
the Fund's investment adviser.  The authority of Katherine M. Cain under
this Statement shall continue until the undersigned is no longer required
to File Forms 3, 4, and 5 with regard to [his/her] ownership of or
transactions in securities of the Fund, or with regard to [his/her]
position with the Fund's investment adviser, unless earlier revoked in
writing.  The undersigned acknowledges that Katherine M. Cain is not
assuming any of the undersigned's responsibilities to comply with Section
16 of the Securities Exchange Act of 1934.

Date: June 10, 2010	        s/   Leo Grohowski

	                          Leo Grohowski