 The cleanup of Kalamazoo River Superfund site started upstream and has moved downstream.First, extant PCB sources were removed, with particular concern being expressed about the continuing release of PCBs in the Bryant Mill Pond area, where a $7.5 million removal program was carried out from June 1998 to May 1999.Two of the Operable Units, King Highway Landfill and Allied Inc., had sheet pile and caps installed, a process which does not remove PCBs but serves as a protective layering containing them.