|   | 1. | Owner      and Contractor agree that this Change Order 4 is a complete and final      settlement and shall serve as an accord and satisfaction for all change      notices, Change Orders, Modifications, and representations made and      submitted by Contractor since Change Order 3, and prior to the effective      date of this Change Order.  Except for the matters specifically      set forth herein, this Change Order does not amend the Agreement or the      Prior Change Orders.  In the event of any disagreement between      the terms of this Change Order, the Agreement, and the Prior Change      Orders, the terms of this Change Order shall be    controlling. |
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|   | 2. | Exhibit      D to the Agreement is hereby amended suchthat: |
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|   | (a) | Effective      immediately, Contractor’s Payroll Burdens and Overhead will be billed at      [*] times all Base Wages actually expended by Contractor’s employees on      the Work, and Contractor’s Fee rate shall be [*]%  for all work      performed by Contractor after the effective date of this Change Order No.      4.  Effective immediately, contract (agency) personnel used in      the performance of the Work shall be billed to Owner at [*] times the      invoice amount received from agency plus a fee of [*] percent, which shall      be applied for all work performed by Contractor after the effective date      of this Change Order No. 4. |
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|   | (b) | Once      Contractor’s total hours expended for all Work performed after the      effectiveness of this Change Order reach [*] (the “PCO Hours”),      Contractor’s Payroll Burdens and Overhead will be billed at: (i) [*] times      all Base Wages for the hours in excess of the PCO Hours (the “Excess Hours”)      that are actually expended by Contractor’s employees on the Work, and      Contractor’s Fee for the Excess Hours shall be [*]%; and (ii) [*] times      the invoice amount received from agency for any contract (agency)      personnel used in the performance of the Work, and Contractor’s Fee for      the Excess Hours shall be [*]%. |
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|   | Mr.      Ric SorboStone      & Webster, Inc.February      10, 2010Page      2 of 4 |
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|   | (c) | Contractor      shall not charge Owner for any premium for overtime, whether or not      Contractor is legally obligated to pay its employees overtime pay (e.g.      1.5 times salary).  For avoidance of any doubt, Owner, agrees to      pay Contractor for overtime worked at the agreed upon straight time rate      for all actual hours worked. |
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|   | 3. | The      third paragraph of Section 10.1.1 regarding payment of invoices is hereby      deleted in its entirety and replaced with the  following: |
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|   | 4. | Effective      upon submission of the next Application for Payment following the      execution of this Change Order, Owner shall withhold [*] percent retainage      pursuant to Section 10.1.1.2 of the Agreement from only those amounts      invoiced by Contractor after the effective date of this Change Order;      provided, however, that all retainage amounts so withheld shall be paid to      Contractor not later than July 31,2010. |
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|   | 5. | Owner      and Contractor acknowledge and agree that Owner has a past due balance      owing to Contractor of $1,797,000 (the “Prior Invoice”)      and retainage shall not be withheld on such amount.  As soon as      practicable after Owner receives payment of an aggregate of $50 million in      loan proceeds from Tianwei New Energy Holdings Co., Ltd., but not later      than March 15, 2010,  Owner shall initiate the remittance to      Contractor of $1 million of the Prior Invoice via wire      transfer.  The balance of the Prior Invoice will be paid in      increments of $400,000 within 30 days thereafter, and $397,000 within      sixty days after payment of the $1million. |
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|   | 6. | Provided      that payment of the Prior Invoice is made in accordance with the schedule      described in Paragraph 5 above, Contractor agrees  to: |
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|   | (a) | waive      any and all interest, fees, and expenses related to the Prior Invoice to      which it may otherwise be entitled pursuant to the    Agreement. |
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|   | (b) | waive      any and all fees, costs, and expenses for Work performed since the Prior      Invoice through December 1, 2009. |
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|   | (c) | Forebear      from foreclosing on any liens it may have filed with respect to the Prior      Invoice. |
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|   | Mr.      Ric SorboStone      & Webster, Inc.February      10, 2010Page      3 of 4 |
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|   | 7. | Pursuant      to a letter dated July 14, 2009, Owner suspended all Work under the      Agreement.  Accordingly, the scheduled dates stipulated in      Exhibit B to the Agreement are no longer valid.  Therefore, the      liquidated damages specified in Addendum 1 to Exhibit D of the amended      Agreement are hereby waived by Owner and Contractor shall have no      liability for any failure to achieve such dates listed in the schedule or      Agreement. |
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|   | 8. | Owner      acknowledges that a majority of Contractor’s Work will be transferred from      Cambridge, Massachusetts to Toronto, Canada.  Contractor will      use commercially reasonable efforts to meet Owner’s personnel requirements      as follows: |
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|   | (a) | [*]      will be assigned as the Engineering Manager.  [*],      Civil/Structural Lead, and [*], Electrical Lead, who are currently      assigned to other projects, will be made available on an as-required basis      to supervise the work of lead engineers in Contractor’s Toronto office,      where Civil/Structural, Electrical, I&C and Piping discipline      activities are expected to be transferred for completion.  [*],      as the Chief in Cambridge, will travel to, and support the efforts in,      Toronto. [*] and [*] will be assigned to Owner’s activities in Toronto.      [*] will be Procurement Lead. |
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|   | (b) | In      addition, [*] will be Civil/Structural Lead, [*] will be Electrical Lead,      [*] will be I&C Lead and [*] will be Piping Lead. [*],      Civil/Structural Chief who has an Idaho PE stamp, will also be available      for the Project. |
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|   | 9. | At      Owner’s request, Contractor will use commercially reasonable efforts to      assign the necessary personnel to Pocatello, Idaho, for on-site      engineering services. |
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|   | 10. | Owner      will use commercially reasonable efforts to cause its general construction      contractor, JH Kelly LLC, to assign one or more of its key personnel to      Contractor’s office in Cambridge, Massachusetts or Toronto, Canada, to      coordinate construction engineering, and to cooperatively manage the      coordinated Project schedule. |
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|   | 11. | Owner      hereby covenants and agrees that Contractor shall be given an opportunity      to submit a bid to complete the Work related to the TCS Functional Areas      before Owner awards a contract for such Work to any third      party.  Owner shall provide Contractor with no less than four      weeks’ prior written notice to submit such bid.  Notwithstanding      anything to the contrary herein, Owner shall have no obligation to award      any contract for Work related to the TCS Functional Areas to      Contractor. |
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|   | 12. | Owner’s      payment of $1 million pursuant to Paragraph 5      above shall constitute Owner’s direction to Contractor to immediately      resume the Work for the Functional Areas, in accordance with the      Agreement, the Prior Change Orders, and this Change  Order. |
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|   | 13. | This      Change Order shall, at the sole option of Contractor, become voidable in      the event that Owner fails to pay Contractor $1 million by March 15, 2010,      pursuant to Paragraph 5  above. |
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|   | Mr.      Ric SorboStone      & Webster, Inc.February      10, 2010Page      4 of 4 |
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