Limitations. Notwithstanding anything in [Section 5.3.1.4], above, to the contrary, Tenant's indemnity of Landlord as set forth in [Section 5.3.1.4], above, shall not be applicable to claims based upon Hazardous Materials not Released by Tenant or Tenant's Agents.

Limitations. Notwithstanding anything in [Section 5.3.1.4], above, to the contrary, Tenant's indemnity of Landlord as set forth in [Section 5.3.1.4], above, shall not be applicable to claims based upon Hazardous Materials which may exist in, on, under, or about the Premises as of the date of this Lease ("Existing Hazardous Materials XE "Existing Hazardous Materials" ") and Tenant shall not in any way be liable for Existing Hazardous Materials, except only to the extent that Tenant's construction activities and/or Tenant's other acts or omissions (including Tenant's failure to remove, remediate or otherwise treat or “Clean-up,” as that term is defined in [Section 5.3.4], below, the subject Existing Hazardous Materials during the tenancy of the Premises) caused or exacerbated the subject claim. Tenant shall not be liable under any circumstances for Hazardous Materials brought onto the Project or Released by Landlord or any Landlord Parties, and Landlord shall remediate the same in compliance with Environmental Laws.