Grain size distribution of the surface sediments collected during the Lake Michigan mass balance and environmental mapping and assessment programs

"The Lake Michigan Mass Balance (LMMB) study, a national demonstration program within EPA, was initiated to develop improved strategies for management and control of toxic chemicals in the coastal environment. The program included measurement and modeling of the transport, fate, and bioaccumulation of four chemicals in Lake Michigan: PCB's (industrial compounds once widely used in a variety of products, banned since 1982), trans-nonachlor (a chlorinated hydrocarbon originally registered as a pesticide in 1948, banned by EPA in 1988), atrazine (the most widely used herbicide in U.S. corn and sorghum production), and mercury (a toxic element which occurs both naturally and anthropogenically). Over 80% of the inventories of PCBs, TNC, and mercury in Lake Michigan are stored in the sediments. Current estimates are that more of these compounds re-enter the water column via sedimentwater exchange than via all of the combined external inputs"--Introduction. Brian J. Eadie, Stephen Lozano. "May 1999." System requirements: Adobe Acrobat Reader. Includes bibliographical references (p. 10).