The EPA's current mitigation plan consists largely of small signs labeling pumps and a 5-gallon minimum to ensure no E15 fuel is left in the hose and unwittingly gets into vessels that it could harm, the report states. A survey last year found that 35 percent — six of 17 — of the registered sellers of E-15 are not labeling the higher-ethanol gas at the pump. The survey also found that several service stations selling E-15 were not registered as required by the Renewable Fuel Standard, which calls for an overall reduction in the fuel supply through the use of biofuels. The sellers of E15 are in Iowa, Kansas and South Dakota. The survey, performed by RFG Survey Association, did not name the retailers that weren't in compliance. The NMMA also is joining several groups, including the Marine Retailers Association of the Americas, to try to get some of the legislation in the Renewable Fuel Standard changed, Trade Only reports.