Paul Busch; Authority on Water, Waste Treatment Paul L. Busch, 61, an authority on management and treatment of industrial and toxic wastes. Busch was president and chief executive of Malcolm Pirnie Inc., a national environmental consulting firm headquartered in White Plains, N.Y. He began with the company as an environmental engineer 38 years ago, after earning bachelor's and master's degrees at the Massachusetts Institute of Technology and a doctorate at Harvard. He rose to vice president in 1970, was named president in 1988 and CEO in 1990. Called a visionary by other leaders in the field, he helped provide clean drinking water and design environmental cleanup solutions for many of the nation's major cities. In San Francisco in 1980, he developed a plan for a waste water treatment system that saved the city more than $ 300 million while providing environmental benefits. More recently in San Diego, he came up with a unique solution for an emergency repair on a giant sewer that allowed city engineers to keep the sewer in service by performing the repair from the outside of the waste pipe. He also helped direct the expansion of a Cleveland facility, creating the world's largest advanced waste water treatment plant, which helped clean up Lake Erie and the Cuyahoga River. The San Diego and San Francisco projects were among many that won accolades from professional societies. Busch's honors include his 1996 election to the National Academy of Engineering. He was past president of the American Academy of Engineers and chairman of the Water Environment Research Foundation and served on the National Research Council's Water Science and Technology Board. Believing that his field needed to increase the numbers of African Americans in environmental engineering, he helped establish the Malcolm Pirnie / United Negro College Fund Scholars Program. On July 28 in Boston of complications of Hodgkins disease.