Pengelolaan lumpur tinja sebagai upaya pencegahan pencemaran air tanah (Studi kasus program layanan lumpur tinja terjadwal di Kelurahan Pademangan Barat, Jakarta Utara) = Faecal sludge management as prevention of ground water pollution (Case study of scheduled faecal sludge service at West Pademangan Subdistrict, North Jakarta).