Seattle -– Environmental engineers and subcontractors are engaged in a waste-stream analysis at the South Transfer Station in South Seattle. Researchers, combing through mounds of trash, are hoping to gather enough evidence to develop customized diversion programs, such as recycling and composting. Conversely, researchers also are studying items placed in recycle bins that should have been placed in the trash, such as pizza boxes. Preliminary results of the study are expected in January. Seattle studies its waste stream every two years.