From what you have written, I would not sign the documentation that your employe wants you to sign for the simple reason that you did not receive the training with respect to asbestos.Likewise, I would not sign the hold harmless letter as well. I suggest that you consult with an attorney that practices in the area of employment law in that there might be some negative fall out to you if you do not sign the requested documentation. You might consider consulting with a representative of your local labor department as well over the matter you have written.