A truck passes through the entrance in Alton to Juniper Ridge Landfill on May 28, 2026. Photo by Erin Rhoda.The proposed expansion of the Juniper Ridge landfill in Old Town and Alton comes as Maine grapples with where to put the PFAS-contaminated sludge that piles up each day at municipal wastewater treatment plants. The landfill’s application for an expansion license is being processed by the Maine Department of Environmental Protection, which…