All uses shall meet the following criteria within the respective districts:
A. In all districts:
1. The use meets all city sewer waste pretreatment requirements.
2. If the use involves hazardous chemicals (as defined by the Environmental Protection Agency), the relationship to any airport shall be reviewed to see that:
a. The use is located to minimize risk of an aircraft accident involving the use.
b. The type of process is not likely to have adverse impacts on the airport should a spill or other problem related to the plant occur.
3. Where the adjoining use or zoning is residential, the maximum setback of heavy industry shall be at least three hundred feet.
B. In the UD district, heavy industrial uses shall only be permitted adjacent to existing railroad tracks and another heavy industrial use. (Ord. 1495-96 § 3(part), 1996).