In the event of spillage, discharge or dripping of gasoline, oil, grease, pollutant or any material which may be unsightly, detrimental or regulated under any environmental law, onto the pavement in any area at the airport, the same shall be removed immediately and reported to the Airport Environmental Coordinator in accordance with the Aviation Department stormwater enforcement and civil penalty policy. The responsibility for the immediate removal of such gasoline, oil, grease, or other material shall be assumed by the operator or owner of the aircraft or equipment causing the same or by the tenant or permittee responsible for the deposit on the pavement. Upon default of the responsible party to clean such area, the City may provide the necessary cleaning and bill the responsible party or parties for the expense thereof. (Ord. No. G-4116, § 2, 1998)