Tenant’s Obligations. Tenant shall repair the Leased Premises, including without limiting the generality of the foregoing, all interior partitions and walls, fixtures, Tenant Improvements and alterations in the Leased Premises, fixtures and shelving, and special mechanical and electrical equipment which equipment is not a normal part of the Leased Premises installed by or for Tenant, reasonable wear and tear, damage with respect to which Landlord has an obligation to repair as provided in Section 18.1 and Section 19 hereof only excepted. Landlord may enter and view the state of repair and Tenant will repair in a good and workmanlike manner according to notice in writing.

Tenant’s Obligations. Tenant shall take care of the Premises and any fixtures, appurtenances, systems, or facilities exclusively serving the same, wherever located in the Building (whether or not part of Landlord’s Work) and, at Tenant’s sole cost and expense, shall # make all repairs and replacements, as and when needed to preserve the Premises in good working order and condition, whether ordinary or extraordinary, foreseen or unforeseen, except that Tenant shall not be required to make any structural repairs or structural replacements to the Premises unless necessitated or occasioned by the acts, omissions or negligence of Tenant, or any of its servants, employees, contractors, agents, visitors, invitees, or licensees, or by the use or occupancy or manner of use or occupancy of the Premises by Tenant or any such person; and # provide for janitorial and rubbish removal services for the Premises and keep and maintain the Premises, clean and free of debris. Landlord shall provide Tenant access twenty-four hours per day, seven days per week to any fixtures, appurtenances, systems, or facilities serving the Premises but not located in the Premises, subject to the terms of other tenant leases, the Rules and Regulations, and Landlord’s reasonable security measures.

Tenant’s Obligations. Tenant’s obligations under this [Section 30] shall survive the expiration or earlier termination of the Lease. During any period of time after the expiration or earlier termination of this Lease required by Tenant or Landlord to complete the removal from the Premises of any Hazardous Materials (including, without limitation, the release and termination of any licenses or permits restricting the use of the Premises and the completion of the approved Decommissioning and HazMat Closure Plan), Tenant shall continue to pay the full Rent in accordance with this Lease for any portion of the Premises not relet by Landlord in Landlord’s sole discretion, which Rent shall be prorated daily.

. Except to the extent an obligation of Landlord pursuant to Paragraph 5.1(b) below, Tenant shall, at all times during the Lease Term and at its sole cost and expense, regularly clean and keep and maintain in good order, condition and repair the Leased Premises and every part thereof including, without limiting the generality of the foregoing, # all interior walls, floors and ceilings, # all windows, doors and skylights, # all electrical wiring, conduits, connectors and fixtures, # all plumbing, pipes, sinks, toilets, faucets and drains, # all lighting systems, fixtures, bulbs and lamps, elevators, and all HVAC equipment, and # all entranceways to the Leased Premises. Tenant, at its option, shall hire, at Tenant’s sole cost and expense, # a licensed HVAC contractor to regularly and periodically (not less frequently than every three months) inspect and perform required maintenance on the HVAC equipment and systems serving the Leased Premises, and # a licensed elevator contractor to regularly and periodically (not less frequently than every six months) inspect and perform required maintenance on the elevators and related systems within the Building, provided that for [clauses (x) and (y)], such contractors shall be reasonably approved by Landlord. Tenant shall, at its sole cost and expense, repair all damage to the Leased Premises, the Building, the Outside Areas or the Property caused by the activities of Tenant, its employees, invitees or contractors promptly following written notice from Landlord to so repair such damages. If Tenant shall fail to perform the required maintenance or fail to make repairs required of it pursuant to this paragraph within a reasonable period of time following notice from Landlord to do so, then Landlord may, at its election and without waiving any other remedy it may otherwise have under this Lease or at law, perform such maintenance or make such repairs and charge to Tenant, as Additional Rent, the costs so incurred by Landlord for same. All glass within or a part of the Leased Premises, both interior and exterior, is at the sole risk of Tenant and any broken glass shall promptly be replaced by Tenant at Tenant’s expense with glass of the same kind, size and quality.

Tenant’s Repair Obligations. Tenant shall, throughout the Lease Term, at its sole cost and expense, maintain, repair, replace and improve as required, the Premises and Building and every part thereof in a good standard of maintenance, repair and replacement as required, and in good and sanitary condition, all in accordance with the standards of First Class Life Sciences Projects, except for Landlord Repair Obligations, whether or not such maintenance, repair, replacement or improvement is required in order to comply with Applicable Laws ("Tenant's Repair Obligations"), including, without limitation, the following: # glass, windows, window frames, window casements (including the repairing, resealing, cleaning and replacing of both interior and exterior windows) and skylights; # interior and exterior doors, door frames and door closers; # interior lighting (including, without

Tenant’s Obligations. Tenant’s obligations under this Section 30 shall survive the expiration or earlier termination of the Lease. During any period of time after the expiration or earlier termination of this Lease required by Tenant or Landlord to complete the removal from the Premises of any Hazardous Materials (including, without limitation, the release and termination of any licenses or permits restricting the use of the Premises and the completion of the approved Decommissioning and HazMat Closure Plan), Tenant shall continue to pay the full Rent in accordance with this Lease for any portion of the Premises not relet by Landlord in Landlord’s sole discretion, which Rent shall be prorated daily.

Tenant’s Obligations. Tenant’s obligations under this Section 30 shall survive the expiration or earlier termination of the Lease. During any period of time after the expiration or earlier termination of this Lease required by Tenant or Landlord to complete the removal from the Premises of any Hazardous Materials (including, without limitation, the release and termination of any licenses or permits restricting the use of the Premises and the completion of the approved Decommissioning and HazMat Closure Plan), Tenant shall continue to pay the full Rent in accordance with this Lease for any portion of the Premises not relet by Landlord in Landlord’s sole discretion, which Rent shall be prorated daily.

Tenant’s Repair Obligations. Tenant, at Tenant’s expense, will maintain the Premises in good order, condition and repair including, without limitation, the interior surfaces of the windows, walls and ceilings; floors; wall and floor coverings; window coverings; doors; interior windows, the heat and air-conditioning equipment installed in the Premises; and all switches, fixtures and equipment in the Premises. Upon receipt of reasonable notice from Tenant, Landlord will perform, at the expense of Tenant, all repairs and maintenance to plumbing, pipes and electrical wiring located within walls, above ceiling surfaces and below floor surfaces resulting from the use of the Premises by Tenant. In no event will Tenant be responsible for any plumbing, pipes and electrical wiring, switches, fixtures and equipment located in the Premises but serving another tenant or for portions of the electrical, mechanical and plumbing systems of the Building which are located in the Premises, except for # repairs resulting from the acts of Tenant and Tenant’s employees, agents, invitees, subtenants, licensees or contractors, and # modifications made to such systems by, for, or because of Tenant, and # special equipment installed by, for, or because of Tenant.

Tenant’s Repair Obligations. Subject to Section 3.03, Section 3.04, Article 12 and Section 15.05 below, Tenant shall, at its own expense, keep the Premises clean and safe and in as good repair and condition as when all of the work described in the Work Letter was completed (or as to subsequent Work, as and when such Work was completed, ordinary wear and tear and damage from casualty and to which Tenant is not obligated to repair pursuant to the express terms of this Lease excepted) (including, without limitation, the repair, maintenance and replacement of all horizontal portions of the systems and facilities of the Building exclusively serving the Premises, including the sanitary and electrical fixtures and equipment therein, and including, without limitation, all restrooms located within the Premises) and shall promptly and adequately repair all damage to the Premises and the Building (subject to Section 15.05) caused by Tenant or any of its employees, agents, guests or invitees, including replacing or repairing all damaged or broken glass, fixtures and appurtenances resulting from any such damage, under the supervision and with the approval of Landlord. If Tenant does not promptly and adequately make such repairs or replacements, Landlord may, but need not, make such repairs and replacements and Tenant shall pay Landlord the reasonable cost thereof within thirty (30) days after demand therefor. Notwithstanding the foregoing provisions, Tenant shall not be responsible for repairs to or replacements of any structural elements of the Building, except to the extent the need for such repairs or replacements arises from # the performance or existence of Work performed by or on behalf of Tenant (including the Turn-Key Work, but excluding any such repairs or replacements first arising during the actual performance of the Turn-Key Work as a result of Landlord’s or any of its contractors’ or employees’ negligence or willful misconduct during the performance of such Turn-Key Work), # the installation, use or operation of Tenant Personalty (but only to the extent the same would not be incurred with respect to typical office equipment customarily used by office tenants in Comparable Buildings, except to the extent the same are installed, used or operated improperly by or on behalf of Tenant), # the moving of Tenant Personalty in or out of the Building, # the negligence or willful misconduct of Tenant or any of its subtenants or its or their employees, agents, contractors or invitees, or # design flaws in any of Tenant’s plans and specifications regardless of the fact that such Tenant’s plans may have been approved by Landlord (including the Turn-Key Work). Subject to Section 15.05, in no event shall Tenant be required to make repairs necessitated by the negligence or willful misconduct of Landlord or of Landlord’s employees, agents, contractors, or of any other Landlord Indemnified Party.

Tenant’s Repair and Maintenance Obligations. Tenant shall, at Tenant’s sole cost and expense maintain and repair, in good repair and in a first-class condition, and pursuant to the specifications set forth in [Exhibit H] attached hereto (reasonable wear and tear, damage by casualty, condemnation, damage by Landlord or any Landlord Party, and repairs which are specifically made the responsibility of Landlord hereunder excepted), those portions of the Premises (inclusive of improvements) which are Tenant Maintenance Responsibilities. Tenant shall comply with all applicable laws in connection with the Tenant Maintenance Responsibilities. At Landlord’s option, if Tenant fails to comply with its obligations, as required in this [Article 7], Landlord may, after written notice to Tenant, and after affording Tenant a reasonable time period within which to conduct such repair or improvement, and after providing Tenant a second notice setting forth Landlord’s intention to engage in self-help (except in the event of an emergency, in which case no notice to Tenant shall be required), but need not, perform such obligations, and Tenant shall pay Landlord the actual reasonable costs incurred by Landlord in connection therewith within thirty (30) days of an invoice from Landlord (accompanied by reasonable supporting documentation).