There aren't any pipes anywhere near the dying trees. It is possible that the trees are in the area where the concrete guys cleaned up, though it doesn't feel like quite the right area, from my recollection. There's not a lot I can do about it, other than wait til I know they are dead, and take them out. And not put another tree there! I'll probably plant some flowers, maybe some lantana, they seem to be almost impossible to kill!
