Washington-The U.S. Environmental Protection Agency says that it expects to have a final decision on an industry request that would allow the use of up to 15 percent of ethanol in gasoline by mid-2010. The current limit is 10 percent. To date, EPA says the results of two tests indicate that engines in newer cars likely can handle an ethanol blend higher than 10 percent. However, EPA is waiting for more testing before making a final decision.