**EXHIBIT10.15**

**SECONDAMENDMENT TOREAL ESTATE OPTION AGREEMENT**

THIS SECOND AMENDMENT****isentered into between **Freeport Area EconomicDevelopment Foundation**, an Illinois not-for profit Corporation,herein referred to as “Optionor,” and **Blackhawk Biofuels, LLC,**hereinreferred to as “Optionee.

RECITALS

A.            Optionorand Optionee have entered into a Real Estate Option Agreement dated June 20,2006, a copy of said Agreement is attached hereto marked Exhibit A.

B.            Optionorand Optionee entered into an Amendment to Real Estate Option Agreement datedNovember 27, 2006.  The Amendmentextended the Real Estate Option Agreement until March 31, 2007.  A copy of said Amendment is attached heretomarked Exhibit B.

C.            Theparties desire to further extend the date for the exercise of the Option as setforth.

AGREEMENT

NOW, THEREFORE, the parties agree as follows:

1.             Paragraph3(b) of the Real Estate Option Agreement is amended effective the date hereofto read as follows:

**ThisOption shall remain in effect until June 30, 2007.  Optionee may exercise this Option at any timeprior to said date.**

2.             Exceptas herein set forth, all other terms and conditions of the Real Estate Option Agreementremain the same and in full force and effect.

IN WITNESS WHEREOF, the parties have executed this SecondAmendment.
|                       |   | OPTIONOR:                                      |
|-----------------------|--------|------------------------------------------------|
|                  |   |                                           |
| Dated: March 20, 2007 |   | FREEPORT AREA ECONOMIC  DEVELOPMENT FOUNDATION |
|                  |   |                                           |
|                  |   | By                                             | /S/ Robert J. Skurla |   |
|                  |   |                                           | Robert Skurla, Executive Director |
|                  |   |                                           |
|                  |   | OPTIONEE:                                      |
|                  |   |                                           |
| Dated: March 20, 2007 |   | BLACKHAWK BIOFUELS, LLC                        |
|                  |   |                                           |
|                  |   | By                                             | /S/ Ronald Mapes |   |
|                  |   |                                           | Ronald Mapes, Chair |

 

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This InstrumentPrepared by:

Attorney Dan G.Fishburn

Snow, Hunter,Whiton & Fishburn, Ltd.

8 East StephensonStreet

Freeport, IL 61032(815-235-2511)

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**REALESTATE OPTION AGREEMENT**

**THISAGREEMENT** entered into this 20th day of June, 2006, between **Freeport Area Economic Development Foundation, anIllinois not-for-profit corporation**, herein referred to as “Optionor,”whose address is 27 W. Stephenson Street, Freeport, Illinois 61032, and **Blackhawk Biofuels, LLC**, herein referred toas “Optionee, “ whose address is 22 S. Chicago Avenue, Freeport, Illinois61032.

1.             Consideration andGrant of Option.  In consideration ofthe payments herein set forth from Optionee to Optionor, Optionor hereby grantsto Optionee an option to purchase Lot 7 in the Replat of Mill Race IndustrialPark (a copy of the draft of the Replat is attached hereto marked at Exhibit A)which is located in the Stephenson County Economic Development area inStephenson County, Illinois (herein referred to as the “Property”), togetherwith all easements and appurtenances thereto, for the price and within the timespecified herein.  This Real EstateOption Agreement is contingent upon Optionor obtaining all necessary governmentapproval and the filing of the Replat of Mill Race Industrial Park inaccordance with the Replat which is attached hereto.  In the event the Replat is not approved, thisOption Agreement shall be null and void and any monies paid to Optionor byOptionee shall be refunded to Optionee.

2.             Payment for Option.  Optionee shall pay Optionor the sum of EightHundred Twenty-five Dollars ($825.00) per month on the first of each monthcommencing August 1, 2006, and on the first of each month thereafter.  Said payment shall be in consideration forthe Option granted to Optionee.  Thepayment will not be applied to the purchase price in the event Optioneeexercises this Option.  In the eventOptionee fails to exercise the Option according to its terms, Optionor shallretain all sums paid under the terms of this Option Agreement.

3.             Exercise of Option.  This option may be exercised by Optionee asfollows:

A.            By written notice fromOptionee to Optionor, at the address provided herein, which written noticeshall provide for a date for closing within 60 days of the date of the writtennotice.

B.            This option shallremain in effect until December 31, 2006. Optionee may exercise this option at any time prior to said date.

C.            If Optionee fails toexercise this option within the time period set forth above, Optionee’s rightto exercise the option and purchase the Property shall automatically terminateand this agreement shall be of no force and effect.

4.             Non-Exercise ofOption.  In the event Optionee doesnot exercise the option to purchase the Property, the consideration paid toOptionor pursuant to Paragraph 2 above shall be forfeited and remain theproperty of Optionor.

5.             Assess to Property.  During the option period, Optionee shall begranted access to the property to perform any necessary due diligence asrequired by Optionee.  Provided however,Optionee shall respect the rights of the current tenants on the premises andshall not disrupt or interfere with the tenants or their business.  Optionee shall return the Property to itsoriginal condition after the completion of any tests, surveys orinspections.  All costs of due diligencestudies shall be borne by Optionee.

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6.             Purchase Price andTerms of Payment.  The purchase pricepaid for the property shall be $15,000.00 per surveyed acre.  Optionor and Optionee agree that upon theexercise of the Option, the parties shall sign an Agreement for Deed, preparedby Optionee’s attorney and approved by Optionor’s attorney, the exercise of theoption shall be contingent upon both parties executing an Agreement for Deedwhich is acceptable to both Optionor and Optionee.  The purchase price shall be determined bysurvey, the total purchase price shall be the number of surveyed acres timesthe price per acre as hereinabove set forth.

7.             Notice.  All notices provided for in this instrument,if not delivered in person, shall be sent by U.S. Certified Mail, ReturnReceipt Requested, to the party at the address given above, or to any otheraddress either party may have designated for receipt of such notices by writtennotice of a change of address.

8.             Representations.  Optionor and Optionee hereby warrant andrepresent to each other that no real estate broker has participated in thistransaction and that this instrument contains the entire agreement of theparties and that any prior discussions or negotiations not set forth in thisAgreement are of no further force and effect.

9.             Assignment.  Optionor and Optionee agree that this Optionmay be assigned by Optionee without the prior written consent of Optionor andthat assignee of Optionee shall have all rights of Optionee hereunder.

10.           Governing Law.  This Agreement shall be governed by the lawsof the State of Illinois.

11.           Prior Agreement Void.  Upon the execution of this Amended RealEstate Option Agreement, the prior Real Estate Option Agreement between theparties dated March 10, 2006, shall be null and void and of no further forceand effect.

IN WITNESS WHEREOF, theparties have executed this Option the day and year first above written.
|        | OPTIONOR:                                      |
|--------|------------------------------------------------|
|   |                                           |
|   | FREEPORT AREA ECONOMIC DEVELOPMENT  FOUNDATION |
|   |                                           |
|   | By                                             | /S/ Robert J. Skurla |   |
|   |                                           | Robert Skurla, Executive Director |
|   |                                           |   |
|   | OPTIONEE:                                      |
|   |                                           |
|   | BLACKHAWK BIOFUELS, LLC                        |
|   |                                           |   |
|   | By                                             | /S/ Ronald L. Mapes, Chair |   |
|   |                                           | Member |

 

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Instrument Prepared by:

Attorney Dan G. Fishburn

Snow, Hunter, Whiton& Fishburn, Ltd.

8 East Stephenson Street

Freeport, IL 61032(815-235-2511)

[SURVEY]

EXHIBIT A

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**AMENDMENTTO**

**REALESTATE OPTION AGREEMENT**

**THISAMENDMENT TO REAL ESTATE OPTION AGREEMENT** is entered into this 27th day of November, 2006, between **Freeport Area Economic Development Foundation, anIllinois not-for-profit corporation**, as Optionor, and **Blackhawk Biofuels, LLC**, as Optionee.

1,             Extension ofOption.  Paragraph 3(b) of the RealEstate Option Agreement dated June 20, 2006 (the “Option Agreement”) is herebyamended to replace the date “December 31, 2006” with “March 31, 2007”.

2.             Other Terms ofOption Agreement.  Except as amendedby paragraph 1 hereof, all other terms of the Option Agreement shall remain infull force and effect between the parties.

IN WITNESS WHEREOF, the parties have executed thisAmendment to Real Estate Option Agreement the day and year first above written.
|        | OPTIONOR:                                      |
|--------|------------------------------------------------|
|   |                                           |
|   | FREEPORT AREA ECONOMIC  DEVELOPMENT FOUNDATION |
|   |                                           |
|   | By                                             | /S/ Robert J. Skurla |   |
|   |                                           | Robert Skurla, Executive Director |
|   |                                           |   |
|   | OPTIONEE:                                      |
|   |                                           |
|   | BLACKHAWK BIOFUELS, LLC                        |
|   |                                           |   |
|   | By                                             | /S/ Ronald Mapes |   |
|   |                                           | Chair |

 

EXHIBIT B

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