Guys, Thanks for your help. After more investigation, it is a concrete cast-in-place substrate. There is no reinforcing and it just looked like they used the Acrodry base coat (3/8" max thickness) and some type of finish coat. Based on all the literature I am reading, it appears that the Acrodry should not have been used. It seems like they should have used something with fiber or a combination of Acrodry and a reinforcing mesh. What are your thoughts? I would like some type of consensus before I make the final report.