It shall be unlawful at any time to park a motor vehicle giving off an offensive or disagreeable odor, or any tank truck, tank trailer, or like vehicle containing or used for the transportation of gasoline, butane, fuel oil, or other highly toxic or flammable substance to be parked on any street, alley, park, or other public place or upon any private property in the city where it would create a hazard to life or adjacent property for a period longer than thirty (30) minutes; however, this restriction shall not be construed to prevent the delivery of such liquid to retail gas stations or to private residences or business or business property, but only for so long as is reasonably necessary to complete such delivery. (Ord. 86-2, 8-18-1986)