The limits referred to in section 8204.2 of the Uniform Fire Code in which bulk storage of liquefied petroleum gas is restricted are hereby established as follows: bulk storage of liquefied petroleum gases shall only be allowed within M-1 and M-2 zoning districts as defined by the Oroville comprehensive zoning ordinance. Notwithstanding the foregoing, service stations may not store more than five hundred gallons of liquefied petroleum gas regardless of the zone. (Ord. No. 1619, § 1 (part).)