If the presence of any regulated substance on or under a lessee’s or licensee’s premises results in any contamination or threatened contamination of the demised or adjacent area, the lessee or licensee shall promptly take all actions at its sole cost and expense to mitigate any immediate threat to health or the environment. Lessee or licensee shall then take such further action necessary to return the premises to the condition existing prior to the introduction of such regulated substances, provided that the City shall first approve such actions. The City’s approval however, shall not be cause for the City to be liable for the lessee’s or tenant’s actions. (Ord. No. G-4116, § 2, 1998)