(1) Give written notice to Persons in violation of the provisions of this Title requiring remedial action to remedy any conditions caused by said violation, including removal of offending installations or obstructions, cleanup of spills or illicit storm drain discharges, and regrading or installation of erosion control protection. Notices may be personally served or may be mailed to violators by registered mail; provided, that a copy is also posted on offending installations for a period of 10 days. If such installations are not removed within 10 days after notice is given, the Division may effect removal at the expense of the Person in violation and may recover its costs and expenses therefor; and/or

(2) Bring an action for the abatement of the nuisance caused by the violation, and/or for the recovery of the City’s costs and expenses incurred in rectifying the violation.