Whenever a hazardous condition is created by the deposit, injection, dumping, spilling, leaking or placing of a hazardous substance, so that the hazardous substance, or a constituent of the hazardous substance, may enter the environment or be emitted into the air or discharged into any waters, including ground waters, the fire chief or the chief's designee may remove or provide for the removal and disposal of the hazardous substance at any time, unless the fire chief or the chief's designee determines such removal will be properly and promptly accomplished by the responsible person. If the responsible party does not initiate and complete cleanup within the time designated by the fire department, the city may proceed to remedy the hazardous condition by performing the necessary cleanup services. (2000 Code § 36.04)