(a)The parking of any vehicle (including, but not limited to trailers and boats) on any lot in any district on other than a surface treated and hardened to accommodate vehicles up to 8,000 pounds gross axle weight is prohibited.(1)Properties shall be limited to concrete, asphalt, or brick surfaces.(2)Properties may use stone surfaces or tar-treated stone surfaces provided that if such property is improved in any manner that construction costs exceed 50% of the assessed property value, the current standard shall apply.(b)Minimum standards for surfaces treated and hardened to accommodate vehicles up to 8,000 pounds are as follows:(1)Concrete: Four inches of 3,000 psi concrete with control joints at least every 20 feet, control joints utilized, wire reinforcement throughout.(2)Asphalt: Binder and topping course mixes at least three inches thick.(3)Brick: Bricks laid in a four inches concrete base, sand/granite leveling base(4)Tar-treated stone: Hot liquefied asphaltic application overlaid with #57 stone.(5)Pervious paving materials as approved by City Staff.