The location of any retaining walls with top and bottom of wall elevations. Plans, profiles, cross-sections, and details of all retaining walls showing the height of wall, the elevation at the top and bottom of each wall, the materials to be used, a profile and cross-section of the wall, any proposed plantings, any safety barriers, calculations of anticipated earth and hydrostatic pressures and surcharges, and calculations detailing the wall design shall be provided unless such documents were reviewed and approved as part of a subdivision or site plan application. All plans, details, and calculations shall be prepared, signed, and sealed by a licensed professional engineer.