Guarantee in the form of a cash deposit, certified check, irrevocable bank letter of credit, surety bond, etc., may be required by the City to be provided in a form acceptable to the City by the project developer. The amount of such guarantee can be made by the City to cover all improvements not normally covered in the building permit, such as but not necessarily limited to landscaping, including earth berms, walls, lighting, surfacing of drives, parking, vehicle maneuvering lanes, including acceleration and deceleration lanes, and other traffic control and traffic circulation improvements, sidewalks, on-site drainage structures, storm sewers, etc. The guarantee shall include a schedule of costs assigned to the several improvements. Monies may be released to the applicant in proportion to work completed and accepted on the various improvements. Any partial release of funds shall leave a balance of not less than 10% of the guarantee, which shall be retained by the City until all work has been completed and subsequently inspected and approved by the City.