LEASE AGREEMENT

THIS FOURTH AMENDMENT TO LEASE AGREEMENT AND REAFFIRMATION OF GUARANTY (" Fourth Amendment ") is made and entered into this 19 ^th   day of June, 2008 by and among the INDIANA PORT COMMISSION, a body corporate and politic existing under the laws of the State of Indiana (the " Commission "), AVENTINE RENEWABLE ENERGY-MT VERNON, LLC a Delaware Limited Liability Company (" Lessee ", and together the " Parties ") and AVENTINE RENEWABLE ENERGY HOLDINGS, INC. (" Guarantor ").

A.           The Commission is charged with the management and operation of the Ports of Indiana, including the Port of Indiana-Mount Vernon, in Posey County, Indiana (the " Port ").

B.           The Parties entered into a certain Lease Agreement dated October 31, 2006, which was executed by the Office of the Attorney General and the Office of the Governor on January 19, 2007 and January 24, 2007 respectively (the “ Original Lease ”), which Original Lease was amended by (i) a certain First Amendment to Lease Agreement and Reaffirmation of Guaranty dated June 14, 2007 among the Parties and Guarantor, (ii) a certain Second Amendment to Lease Agreement and Reaffirmation of Guaranty dated October 18, 2007 among the Parties and Guarantor, and (iii) a certain Third Amendment to Lease Agreement and Reaffirmation of Guaranty dated December 20, 2007 among the Parties and Guarantor (said Original Lease as so amended is herein referred to as the " Lease "), whereby the Commission leased to Lessee and Lessee leased from the Commission that certain real estate described in the Lease, located at the Port of Indiana-Mount Vernon, a port managed and operated by the Commission in Posey County, Indiana.

C.           The Parties have agreed to amend the Lease to remove from the Leased Premises the relocated Southwind Port Road (depicted on Exhibit A-2 hereto), to add to the Leased Premises the former Southwind Port Road (Parcel # 2A depicted on Exhibit A-2 hereto) and to make other changes in the legal descriptions of the Leased Premises.

D.           Guarantor is joining in the execution of this Fourth Amendment solely for purposes of consenting to all provisions of this Fourth Amendment and ratifying, confirming and reaffirming its obligations under that certain Lease Guaranty dated as of October 31, 2006 (the " Lease Guaranty ").

E.           Lessee, the Commission and Guarantor have each had substantial participation in the preparation of this Fourth Amendment which shall become effective upon execution by the Parties.

F.           At a properly convened public meeting, the Commission has duly approved the execution and delivery of this Fourth Amendment by its duly authorized officers.

NOW, THEREFORE, in consideration of the foregoing premises, the mutual undertakings hereinafter set forth, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Commission, Lessee and Guarantor (solely for purposes of its agreement to the provisions of Paragraph 6 below) hereby agree as follows:

1.           Lines 1 through and including 15 of Section 1.01 of the Lease are hereby deleted in their entirety and replaced by the following:

Section 1.01 .   THE DEMISE .  The Commission does hereby demise and lease to Lessee, and Lessee does hereby lease from the Commission, that certain real estate consisting of approximately 118 acres, more or less, located at the Port of Indiana – Mount Vernon, a port managed and operated by the Commission in Posey County, Indiana; said real estate being more particularly described as Parcel # 1, Parcel # 2, Parcel # 2A, Parcel # 3, Parcel # 3A, Parcel # 4, Parcel # 4A, easement Parcel # 5 and easement Parcel # 6 on Exhibit A attached hereto and incorporated herein by this reference and depicted on Exhibit A-1 attached hereto and incorporated herein by this reference (the “ Real Estate ”;  the buildings, structures fixtures and other improvements now or hereafter located on the Real Estate being herein referred to as the “ Improvements ”; and the Real Estate and Improvements being herein referred to as the “ Leased Premises ”).  The Real Estate is located within the Port more particularly described on Exhibit A-2 attached hereto and incorporated herein by this reference.  The demise further grants to Lessee:

The remainder of Section 1.01, commencing with clause (i), is not amended.

2.            Exhibit A to the Lease is hereby deleted in its entirety and replaced by Exhibit A – DESCRIPTION OF LEASED REAL ESTATE attached to this Fourth Amendment and incorporated herein by this reference.

3.           The caption of “ Exhibit A-1 ” to the Lease is hereby amended to be “ Exhibit A-2 – DESCRIPTION OF PORT REAL ESTATE .

4.            Exhibit A-1 – PLAT OF LEASED REAL ESTATE to this Fourth Amendment is hereby added to the Lease, immediately following Exhibit A and preceding Exhibit A-2 .

5.           The following paragraph is hereby added to the end of Section 1.01 of the Lease:

Reference is hereby made to a certain ALTA/ACSM Land Title Survey of the Real Estate prepared by Morley and Associates, Inc. as Job No. 7313 dated 2/8/2007 and last revised 6/13/2008 (the “ Survey ”), which is the Survey delivered by Lessee to the Commission pursuant to Section 1.01 of the Original Lease, as so last revised.  Within a reasonable period of time after the completion of the Project, and at such other times prior to such completion as determined by Lessee or reasonably requested by the Commission, Lessee shall provide to the Commission at Lessee’s sole expense further revisions of the Survey to show the as-built conditions and such other matters relating to the Real Estate as determined by Lessee or reasonably requested by the Commission.  Promptly after the receipt of any such revisions, the Parties shall enter into amendments to the Lease and the Memorandum in form and substance reasonably satisfactory to each of them setting forth any changes to the metes and bounds descriptions of the Real Estate, any details of any of the easements referred to in clauses (i) through (iv) of Section 1.01 of the Lease and/or any other matter relating to the Real Estate, any such items or any such revisions of the Survey reasonably requested by either of them, including the satisfaction of the following notes appearing on the Survey:

The Parties agree to cooperate in good faith to cause the agreements referred to in said notes to be executed and delivered and the actions referred to in said notes to be taken.

6.           Guarantor hereby consents to the amendments to the Lease made by this Fourth Amendment and agrees that such amendments shall not affect, impair, discharge, relieve or release Guarantor of its obligations under the terms of the Lease Guaranty, and that such Lease Guaranty shall be deemed to reference the Lease as amended hereby. Guarantor hereby ratifies, confirms and reaffirms in all respects, the Lease Guaranty, and agrees that said Lease Guaranty shall continue in full force and effect.

7.           The Commission and Lessee agree that the above and foregoing Recitals are true, correct and complete and are hereby incorporated and made a part of this Fourth Amendment as if completely and fully set forth herein. Capitalized terms used in this Fourth Amendment without definition shall have the meanings set forth in the Lease as previously amended, except that any internal references in the Lease to the word " Lease " shall mean the Lease, as previously and hereby amended, wherever therein the context so requires in order to give meaning to this Fourth Amendment.

8.           Lessee and the Commission hereby affirm, reaffirm and confirm that as of the date hereof the Lease is in full force and effect, that the Lease has not been modified or amended (except as provided in this Amendment) and that all of the Commission's and Lessee's obligations accrued to date have been performed. Lessee and Commission hereby agree that there are, as of the date hereof, regardless of the giving of notice or the passage of time, or both, no defaults or breaches on the part of

the Commission or Lessee under the Lease, as amended by this Fourth Amendment. Each of Lessee and the Commission hereby ratify the provisions of the Lease on behalf of themselves and their respective successors and assigns and agree to attorn and be bound to each other and their respective successors and assigns as to all of the terms, covenants and conditions of the Lease, as amended hereby. This Fourth Amendment shall be incorporated into and made a part of the Lease and all provisions thereof not expressly modified or amended hereby shall remain in full force and effect. Nothing contained in this Fourth Amendment (except, as applicable, for the specific amendments to the Lease set forth in this Fourth Amendment) shall release or relieve Lessee or Commission from their respective obligations or liabilities under the Lease accruing prior to the date hereof.

9.           Except as expressly amended and modified by this Fourth Amendment, the Lease shall otherwise remain in full force and effect, the parties hereto hereby ratifying and confirming the same. This Fourth Amendment, together with the Lease, is the complete understanding between the parties and supersedes all other prior agreements and representations concerning its subject matter. To the extent of any inconsistency between the Lease and this Fourth Amendment, the terms of this Fourth Amendment shall control.

10.           Immediately following the signature page of this Fourth Amendment is the Addendum of State required contract provisions previously executed by the Parties. The Parties reaffirm the covenants and affirmations contained in said Addendum and incorporate the same into this Fourth Amendment.

IN WITNESS WHEREOF, the parties hereto have executed this Lease as of the day, and month and year first above-written.

(IPC3.21.06)

This Addendum is entered into by and between the Ports of Indiana (the " State ") and Aventine Renewable Energy-Mt Vernon, LLC (the " Contractor "), and collectively known as the " Parties ".  The purpose of this Addendum is to modify, delete, or amend certain terms and conditions set forth in the attached Fifth Amendment (" Agreement ").  This Addendum and the Agreement are incorporated into each other and, when read together, shall constitute one integrated document.  Any inconsistency, conflict, or ambiguity between this Addendum and the Agreement shall be resolved by giving precedence and effect to this Addendum.

1.           Authority to Bind Contractor

The signatory for the Contractor represents that he/she has been duly authorized to execute this Contract on behalf of the Contractor and has obtained all necessary or applicable approvals to make this Contract fully binding upon the Contractor when his/her signature is affixed, and certifies that this Contract is not subject to further acceptance by Contractor when accepted by the State of Indiana.

2.           Compliance with Laws.

3.           Conflict of interest.

" Immediate family " means the spouse and the unemancipated children of an individual.

" Interested party " means:

" Department " means the Indiana Department of Administration.

" Commission " means the State Ethics Commission.

4.           Drug-Free Workplace-Certification.

The Contractor hereby covenants and agrees to make a good faith effort to provide and maintain a drug-free workplace.  The Contractor will give written notice to the State within ten (10) days after receiving actual notice that the Contractor or an employee of the Contractor in the State of Indiana has been convicted of a criminal drug violation occurring in the Contractor's workplace.  False certification or violation of this certification may result in sanctions including suspension

of contract payments, termination of this Contract and/or debarment of contracting opportunities with the State for up to three (3) years, subject to the notice and cure provisions of Sections 11.01(i) and 7.02 of the Agreement.

In addition to the provisions of the above paragraphs, if the total contract amount set forth in this Contract is in excess of $25,000.00, Contractor hereby further agrees that this contract is expressly subject to the terms, conditions, and representations of the following certification:

This certification is required by Executive Order No. 90-5, April 12, 1990, issued by the Governor of Indiana.  Pursuant to its delegated authority, the Indiana Department of Administration is requiring the inclusion of this certification in all contracts and grants from the State of Indiana in excess of $25,000.00.  No award of a contract shall be made, and no contract, purchase order or agreement, the total amount of which exceeds $25,000.00, shall be valid, unless and until this certification has been fully executed by the Contractor and made a part of the contract or agreement as part of the contract documents.

The Contractor certifies and agrees that it will provide a drug-free workplace by:

5.           Nondiscrimination

Pursuant to IC 22-9-1-10 and the Civil Rights Act of 1964, the Contractor and its subcontractors shall not discriminate against any employee or applicant for employment in the performance of this Contract.  The Contractor shall not discriminate with respect to the hire, tenure, terms, conditions or privileges of employment or any matter directly or indirectly related to employment, because of race, color, religion, sex, disability, national origin or ancestry.  Breach of this covenant may be regarded as a material breach of this Contract The Contractor's execution of this Contract also signifies compliance with applicable federal taws, regulations, and executive orders prohibiting discrimination in the provision of services based on race, color, national origin, age, sex, disability or status as a veteran.  The provisions of this Section 5 are subject to the notice and cure provisions of Sections 11.01(1) and 7.02 of the Agreement.

The undersigned attests, 'subject to the penalties for perjury, that he/she is the Contractor, or that he/she is the properly authorized representative, agent, member or officer of the Contractor, that he/she has not, nor has any other member, employee, representative, agent or officer of the Contractor, directly or indirectly, to the best of his/her knowledge, entered into or offered to enter into any combination, collusion or agreement to receive or pay, and that he/she has not received or paid, any sum of money or other consideration for the execution of this Contract other than that which appears upon the face of this Contract.

In Witness Whereof , the Parties have, through duly authorized representatives, entered into this Lease.  The Parties having read and understand the foregoing terms of the contract do by their respective signatures dated below hereby agree to the terms thereof.