There are some towers that are being welded on that have lead paint and they are not being addressed by the engineers and other people in the industry. It's rare if ever that you will see any specifications warning the contractor or requiring any safety precautions. It seems that there is an absence of concern by the tower owners. In short I believe it is being ignored because they don't want to spend the extra money to make sure it is done correctly. All of those old AT&T towers are loaded with it as are many others.