SPONSORED BY AIR & WASTE MANAGEMENT ASSOCIATION AMERICAN INSTITUTE OF CHEMICAL ENGINEERS AMERICAN PUBLIC HEALTH ASSOCIATION AMERICAN WATER WORKS ASSOCIATION AMERICAN PUBLIC WORKS ASSOCIATION ASSOCIATION OF ENVIRONMENTAL ENGINEERING AND SCIENCE PROFESSORS AMERICAN SOCIETY FOR ENGINEERING EDUCATION SOLID WASTE ASSOCIATION OF NORTH AMERICA AMERICAN SOCIETY OF CIVIL ENGINEERS NATIONAL SOCIETY OF PROFESSIONAL ENGINEERS AMERICAN SOCIETY OF MECHANICAL ENGINEERS WATER ENVIRONMENT FEDERATION / / /