WASHINGTON, April 25 -- A group of 13 state Attorneys General have submitted a public comment letter to the U.S. Environmental Protection Agency concerning the agency's proposed rule on National Emission Standards for Marine Tank Vessel Loading Operations. The letter opposes key aspects of the EPA's approach regarding the treatment of health benefits and residual risk reviews under the Clean Air Act. While supporting adoption of technology to curb hazardous air pollutants and volatile organic c  more