I have an indoor football practice facility under review. The facility consists of a covered football field and a "head house" containing toilets, training rooms, etc.). The contractor provided data on all of the flooring systems in the head house, but not for the practice field where there is no "floor". The field has a synthetic grass surface (FieldTurf) over a drainage fill of sand and gravel. The reviewer has stated that this material covers the major part of the facility and has requested that we provide data. However, since it is neither a carpet nor a resilient flooring, we aren't sure what we're supposed to comply with. Has anyone out there had any experience with this?