If the Environmental Manager issues a lawful order directing any person who has violated or is in violation of any provisions of the hazardous waste or substance control laws to take corrective action respecting such violation, and if such person does not take such corrective action on or before the data specified in the order, the City may take or contract for the taking of such corrective action. If such corrective action is taken by or contracted for by the City, the person to whom the order was directed shall be liable to the City for the cost incurred by it in taking or contracting for such corrective action. If such corrective action is taken by the person to whom the order is directed or by such person’s agent, the person to whom the order is directed shall be liable to the City for the City’s costs of supervising such corrective action or otherwise verifying compliance with the order.