We have pulled the carpeting up out of our house and have found an unpleasant surprise. A previous owner apparently put down some type of tile on top of the wood floor. when we pulled up the carpet, we found the adhesive (mortar, mastic, whatever!). Does anyone have any suggestions as to how to remove this material? I know there are chemicals that can be used, but I have pets and would be a little concerned about fumes. Thanks for any help you folks can offer!