 Shares of US Ecology Inc. ECOL, 5.19 soared before being halted for news, as the provider of environmental services announced an agreement to be acquired by Republic Services Inc. RSG, 0.42 in a deal valued at 2.2 billion, including 700 million in debt. Under terms of the deal, US Ecology shareholders will receive 48 in cash for each US Ecology share they own, which represents a 70.4 premium to Tuesdays closing price of 28.17. 