Conceptual Site Model - Argonne National Laboratory

WVDP Phase 1 CSAPcoat, application of epoxy sealer. It was demolished down to its concrete floor slab in October2006.Lag Storage Addition 1 Slab. Lag Storage Addition 1 was a pre-engineered steel frame and fabricstructure built in 1987 to store containerized LLW. It was 191 feet long by 55 feet wide by 23 feethigh. It was removed down to its grade level floor in October 2006. It falls within the CPC-WSAhardstand footprint.Lag Storage Addition 2 Foundation. Lag Storage Addition 2 was a tent structure that was builtin 1988 and dismantled in 1993 after it was damaged by high winds. The foundation consists ofeight inches of crushed stone covering an area 65 feet by 200 feet. It falls within the CPC-WSAhardstand footprint.Lag Storage Addition 3. Lag Storage Addition 3, like Lag Storage Addition 4, is a clear-spanstructure, with a pre-engineered steel frame and steel sheathing, about 290 feet long, 90 feet wideand 40 feet high, on a seven-inch thick concrete slab. It is scheduled to be removed down to itsconcrete floor slab during the work to achieve the interim end state.Lag Storage Addition 4. Lag Storage Addition 4 is a clear-span structure, with a pre-engineeredsteel frame and steel sheathing. It measures approximately 290 feet long, 90 feet wide, and 40feet high, and it rests on a seven-inch thick concrete slab. It is similar to Lag Storage Addition 3,except that it includes a Shipping Depot, a Container Sorting and Packaging Facility, and acovered Passageway between the Lag 3 and Lag 4 buildings. The Shipping Depot is connected toLag Storage Addition 4 and is a 91 foot by 85 foot metal frame structure. This facility and itsconcrete floor slab will be removed during Phase 1 decommissioning.Chemical Process Cell Waste Storage Area. Also known as the CPC-WSA hardstand, this wastestorage area includes a structure used to store equipment removed from the Chemical ProcessCell. The structure is a 200 foot by 70 foot by 30 foot high galvanized steel-panel enclosure witha gravel pad floor. It will be removed down to its gravel pad during the work to achieve theinterim end state.Hardstands. Several compacted gravel pads (also known as hardstands) are located withinWMA 5:Rev. 1 E-2