Exhibit A

JOINT FILING STATEMENT

     Pursuant to Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned agree that the Statement on Schedule 13G and any amendments thereto to which this exhibit is attached is filed on behalf of each of them.

Date:                      , 2011

COFFEYVILLE ACQUISITION LLC
Signature:	*
By:	James J. Connors, II, its Vice President
KELSO INVESTMENT ASSOCIATES VII, L.P
Signature:	*
By:	Kelso GP VII, L.P., its General Partner,
	by Kelso GP VII, LLC, its General
	Partner, by James J. Connors,II, its
	Managing Member
KELSO GP VII, L.P.
Signature:	*
By:	Kelso GP VII, LLC, its General Partner,
	by James J.Connors, II, its Managing
	Member
KELSO GP VII, LLC
Signature:	*
By:	James J. Connors, II, its Managing
	Member
KEP VI, LLC
Signature:	*
By:	James J. Connors, II, its Managing
	Member
PHILIP E. BERNEY
Signature:	*

23

FRANK K. BYNUM, JR.
Signature:	*
JAMES J. CONNORS, II
Signature:
MICHAEL B. GOLDBERG
Signature:	*
FRANK J. LOVERRO
Signature:	*
GEORGE E. MATELICH
Signature:	*
CHURCH M. MOORE
Signature:	*
FRANK T. NICKELL
Signature:	*
STANLEY DE J. OSBORNE
Signature:	*
DAVID I. WAHRHAFTIG
Signature:	*
THOMAS R. WALL, IV
Signature:	*
CHRISTOPHER L. COLLINS
Signature: *

*By:	/s/ James J. Connors, II
	Name:	James J. Connors, II
	Attorney-in-fact

24