Failure to Timely Clean-Up. Should any Clean-up for which Tenant is responsible not be completed, or should Tenant not receive the Closure Letter and any governmental approvals required under Environmental Laws in conjunction with such Clean-up prior to the expiration or earlier termination of this Lease, then, commencing on the later of the termination of this Lease and three (3) business days after Landlord's delivery of notice of such failure and that it elects to treat such failure as a holdover, Tenant shall be liable to Landlord as a holdover tenant (as more particularly provided in Article 16) until Tenant has fully complied with its obligations under this Section 5.3.

Environmental Reports; Clean-Up. If any written report, including any report containing results of any Environmental Assessment (an "Environmental Report") shall indicate # the presence of any Hazardous Materials as to which Tenant has a removal or remediation obligation under this Section 5.3, and # that as a result of same, the investigation, characterization, monitoring, assessment, repair, closure, remediation, removal, or other clean-up (the "Clean-up") of any Hazardous Materials is required, Tenant shall immediately prepare and submit to Landlord within thirty (30) days after receipt of the Environmental Report a comprehensive plan, subject to Landlord’s written approval, specifying the actions to be taken by Tenant to perform the Clean-up so that the Premises are restored to the conditions required by this Lease. Upon Landlord’s approval of the Clean-up plan, Tenant shall, at Tenant’s sole cost and expense, without limitation on any rights and remedies of Landlord under this Lease, immediately implement such plan with a consultant reasonably acceptable to Landlord and proceed to Clean-Up Hazardous Materials in accordance with all applicable laws. If, within thirty (30) days after receiving a copy of such Environmental Report, Tenant fails either # to complete such Clean-up, or # with respect to any Clean-up that cannot be completed within such thirty-day period, fails to proceed with diligence to prepare the Clean-up plan and complete the Clean-up as promptly as practicable, then Landlord shall have the right, but not the obligation, and without waiving any other rights under this Lease, to carry out any Clean-up recommended by the Environmental Report or required by any governmental authority having jurisdiction over the Premises, and recover all of the costs and expenses thereof from Tenant as Additional Rent, payable within ten (10) days after receipt of written demand therefor.

Environmental Reports; Clean-Up. If any written report, including any report containing results of any Environmental Assessment (an “ XE "Environmental Report" Environmental Report”) shall indicate # the presence of any Hazardous Materials as to which Tenant has a removal or remediation obligation

First Amendment to Second Amended and Restated Operating Agreement, dated as of March , 2014, of 2012 V PPA Holdco, LLC by and between Firstar and Clean Technologies;

Timely Notice. In order to receive termination compensation and the health insurance benefit set forth in numbered paragraph 1, the Employee agrees to notify ​ in writing within 45 days of the "Good Reason" event that entitles the Employee to termination compensation. Failure to provide such written notice shall be deemed a full waiver of all termination compensation. It is specifically understood and agreed that this 45-day notice is a material condition precedent to the Employer's obligation to pay these benefits. Employee fully understands the need for timely notice and agrees that termination compensation and health insurance will not be paid if notice is not given within 45 days of the "Good Reason" event.

No Rent Abatement. Tenant shall continue to pay all Rent due or accruing under this Lease during any Clean-up, and shall not be entitled to any reduction, offset or deferral of any Base Rent or Additional Rent due or accruing under this Lease during any such Clean-up.

Signs, Response Plans, Etc. Tenant shall be responsible for posting on the Premises any signs required under applicable Environmental Laws in connection with any required Clean-up necessitated by Tenant's use of the Premises. Tenant shall also complete and file any business response plans or inventories required by any Applicable Laws in connection with any required Clean-up, necessitated by Tenant's use of the Premises. Tenant shall concurrently file a copy of any such business response plan or inventory with Landlord in connection with any required Clean-up, necessitated by Tenant's use of the Premises.

Catch-up contributions means elective deferrals made to the plan that are in excess of an otherwise applicable plan limit and that are made by participants who are age 50 or over by the end of their taxable years. An otherwise applicable plan limit is a limit in the plan that applies to elective deferrals without regard to catch-up contributions, such as any limitation set forth in Section 3.4, the limits on annual additions described in Section 5.1, the dollar limitation on elective deferrals under Code section 402(g) (not taking into account catch-up contributions) and the limit imposed by the actual deferral percentage (ADP) test under [Section 5.5(b)]. Catch-up contributions for a participant for a taxable year may not exceed:

Make-Up Subaccounts. The balance in Participant’s Make-Up Subaccount shall vest or be forfeited under the same terms that would apply had such amount been part of the Participant’s account under the ESOP; provided, however that amounts so forfeited shall not be restored if the Participant is reemployed, regardless of whether similar forfeitures under the ESOP would be restored under the circumstances.

Lock-Up Period. Optionee hereby agrees that if so requested by the Company or any representative of the underwriters (the “Managing Underwriter”) in connection with any registration of the offering of any securities of the Company under the Securities Act, Optionee shall not sell or otherwise transfer any Shares or other securities of the Company during the 180-day period (or such longer period as may be requested in writing by the Managing Underwriter and agreed to in writing by the Company) following the effective date of a registration statement of the Company filed under the Securities Act (the “Market Standoff Period”); provided, however, that such restriction shall apply only to the first registration statement of the Company to become effective under the Securities Act that includes securities to be sold on behalf of the Company to the public in an underwritten public offering under the Securities Act. The Company may impose stop-transfer instructions with respect to securities subject to the foregoing restrictions until the end of such Market Standoff Period, and these restrictions shall be binding on any transferee of such Shares. Notwithstanding the foregoing, the 180-day period may be extended for up to such number of additional days as is deemed necessary by the Company or the Managing Underwriter to continue coverage by research analysts in accordance with NASD Rule 2711 or any successor rule.