July 20, 2011

Exhibit 99.10

July 20, 2011

NTR Metals, LLC

00000 Xxxxxxxxx Xxxxx

Xxxxxx, Xxxxx 00000

K&L Gates LLP

0000 Xxxx Xxxxxx, Xxxxx 0000

Xxxxxx, Xxxxx 00000

RE: Extension of Termination Date

This letter agreement (this “Letter Agreement”) evidences the mutual agreement between myself, NTR Metals, LLC, a Texas limited liability company (“NTR”), and K&L Gates LLP (the “Escrow Agent”) in accordance with Section 12(d) of that certain Escrow Agreement, dated June 10, 2011, by and between myself, NTR and the Escrow Agent (the “Escrow Agreement”), to extend the Termination Date (as that term is defined in the Escrow Agreement) to August 15, 2011.

If this letter agreement is acceptable to you, please indicate your acceptance by executing the following page and returning to the undersigned a copy of this letter agreement

Very truly yours,

/s/ Xx. X. X. Xxxxx

Xx. X.X. Xxxxx

Accepted and agreed to this 20^th day of July, 2011:

NTR Metals, LLC
By:		/s/ Xxxx X. Xxxxxx

Name:		Xxxx X. Xxxxxx
Title:		President

K&L Gates LLP
By:		/s/ I. Xxxxx Xxxxxxxx

Name:		I. Xxxxx Xxxxxxxx, Esq.
Title:		Partner

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