While there are contaminants in the groundwater above EPA standards caused by the dump site, an EPA toxicologist determined there are not any human receptors affected. It would be acceptable to remove only the waste that is above surface levels e.g., piles of tires, white goods, etcand cap the remaining portion of waste and leave it in place. This cap does not necessarily need to be a RCRA Subtitle D cap and EPA and the Tribe can work out what type of cap is appropriate and the approximate cost. The cap will decrease the amount of leaching of contaminants into the groundwater and enable the Tribe to safely reuse the land as pasture. Before any homes are built between the Dump Site and Lake Oahe, you should have further studies done to determine groundwater contamination levels. The Tribe should also have a civil engineer look at the site for ground stability before the cap is placed.
Former Use: The Long Soldier Dump Site property is a tribal property located in the Long Soldier District, it opened in approximately 1960 and has been closed since 1990.