0000950123-09-062133 Sample Contracts

AMENDMENT TO NOTE AND WARRANT EXCHANGE AGREEMENT
Note and Warrant Exchange Agreement • November 13th, 2009 • CleanTech Biofuels, Inc. • Industrial organic chemicals • New York

This Amendment to Note and Warrant Exchange Agreement (this “Agreement”) is entered into as of the _______day of July, 2009, by and between Vertex Energy, Inc. (“Vertex”) and CleanTech Biofuels, Inc. (“CTB”).