Conceptual Site Model - Argonne National Laboratory

WVDP Phase 1 CSAP• The Lag Hardstand, also known as the New/Old Hardstand, is located southwest of LagStorage Additions 3 and 4 and is used to store packaged equipment and containers of lowlevel waste. The original hardstand (“Old Hardstand”) was reworked as part of WVDPactivities, with a portion of its original footprint now under Lag Storage Additions 3 and 4,and part incorporated into the New Hardstand.• The Cold Hardstand, which is located west of the Construction and Demolition DebrisLandfill (WMA 4), has been used as a nonradioactive material staging and storage area.• The Vitrification Vault and Empty Container Hardstand is located north and west of theHazardous Waste Storage Lockers, and falls within the CPC-WSA hardstand footprint.• The HLW Tank Pump Storage Vault Area. This falls within the CPC-WSA hardstandfootprint.Hazardous Waste Storage Lockers. Four steel hazardous waste storage lockers are located east ofthe Waste Tank Farm (WMA 3). Each locker measures eight feet by 16 feet by eight feet highand is used for short-term storage of hazardous waste. The lockers will be removed during thework to achieve the interim end state. The lockers fall within the footprint of the CPC-WSAhardstand.E.2 Physical SettingWMA 5 is located in the northwest corner of the WVDP premises on the North Plateau. To thenorth and west is the WVDP fence line. To the northeast is WMA 12 North. To the south areWMA 10 and WMA 3. To the east are WMA 2 and WMA 4.WMA 5 includes a significant amount of wetlands in its northeast portion. It is drained by acombination of storm sewer lines and a surface drain that flows to the northeast, exiting theWVDP project premises in the northeast corner of WMA 5 and eventually emptying into QuarryCreek through surface water discharge location WSNSW74A north of the project premises.Rev. 1 E-3