PLAINFIELD TWP., Pa. — Almost four years ago, Millie Beahn was running around in the rain, going door-to-door to try to spread a warning about sludge. “I went to my neighbors and I took a paper around, asking people to sign,” Beahn said. “To tell the Nazareth Borough Municipal Authority that they did not want them spreading their — they call it biosolids to make it sound nice, but it’s the stuff from the sewer plant — and spreading it here on this preserved farm.”…