Digging to plant a small tree, way in backyard away from house, plastic pipe was 1.5’+ underground. Plastic crumbled when I stuck my hand to feel where it started to leak out. Was not pressurized and came out slow, very red at first. Seems maybe slightly viscous. Hole now filling very slowly. Pipe was running laterally between my neighbors house and mine. Nowhere near the street or water supply. Seems to maybe have stopped filling the hole. Any ideas?