- In Swansea, South Carolina, there are several convenient options for dumping your RV's black water and gray water tanks.- You can find dump stations at Edmund RV Park, Barnyard RV Park, Woodsmoke Campground, Military Park - Weston Lake Recreation Area, and RV Park.- These stations offer access to fresh water for flushing tanks and usually have a designated area for RV trash disposal.- Be sure to bring your own hose for flushing tanks and follow proper etiquette when using the dump stations.