ASA does not have such a document. The concrete cover for embedded reinforcing steel is subject to the local Building Codes and may be increased by the structural plans and specifications produced by an Engineer or Architect for a specific project. ACI 350-06, “Code Requirements for Environmental Engineering Concrete Structures and Commentary,” covers concrete structures intended for water containment and would be applicable to pools. The following is a link to ACI’s bookstore: www.concrete.org/bookstore/ProductDetail.aspx?itemid=35006.