When authorized by the Board of Appeals, the following shall be principal conditional uses in a E heavy commercial-limited manufacturing district:
(a) Freight terminals. Truck terminals, minor railroad freight stations and depots; provided, that the premises is at least 200 feet from any residence district and subject to approval by the Traffic Engineer.
(b) Bulk stations. Provided all storage tanks shall be located under ground.
(c) Building materials sales yards. Including concrete mixing, lumber yards, planing mills, open yards for storage and sale of feed or fuel, or both, when located not less than 200 feet from any residence district.
(d) Airports. Provided all of the Federal and State aeronautical regulations are complied with. Uses of airport land shall be limited to the uses permitted in the E district, and, in addition, those commercial and industrial uses incidental and related to airport operations.
(Ord. 2046, passed 4-11-1968)