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Antea®Group, a global engineering and environmental consulting firm, and Tersus entered into Exclusive License Agreement for US Patent No. 7138060. Under the terms of the agreement, Tersus will make, market, promote and sell products for sulfate-enhanced bioremediation of contaminated groundwater. The patent includes a process for using high concentrations of sulfate to stimulate biodegradation of petroleum hydrocarbons (PHCs), other aromatic hydrocarbons and other contaminants susceptible to sulfate-reducing bacteria.