The newly created, 160-acre Royal Palm Beach Commons Park in Florida has been constructed on a former golf course. When the tee boxes and greens were excavated, arsenic-contaminated soil had to be stockpiled. Arsenic was part of the herbicides used on the course for many years. Now, the soil is contained on an 18-foot-high mound behind a residential home. A 20-mil liner has been installed for containment. Residents want the arsenic soil moved, but the city says it would be too expensive.