For more than half a century, residents of Sampson County, North Carolina have watched their local landfill grow to nearly 1,300 acres , becoming the largest in the state. Garbage now arrives from far beyond the county line, traveling from all over the state. For locals like Sherri White-Williamson, the scale of the operation has become a source of concern. She grew up in the county, and was alarmed by potential for landfill chemicals leaching into residents’ groundwater and the impact it may be having on their health . “Many of the folks out around that landfill are on well water,” White-Williamson explained. “They are drinking in it, they’re bathing in it, they’re using it to water gardens and animals.”  She worked for years at the U.S. Environmental Protection Agency, working in its Office of Environmental Justice, where public outreach and education, and coordinating between communities and federal agency staff together with the community were part of her daily routine.…