Every vehicle that transports waste on the streets of this City, including vehicles used by the City, must be equipped with adequate coverings and containers to prevent the spilling or dropping of any waste. The vehicle and all waste containers must:be strong and tight; have sides high enough above the load that no part of the load can fall, leak, or spill; and be covered with heavy canvas or other substantial material. City Code, 1976/83, art. 11, §121(2nd sen.), art. 23, §§15, 16 Ord. 99-548