This is an amendment to a previously synopsized requirement for the National Park Service, The National Park Service, Pinnacles National Park to rehabilitate the west side power and cooling systems. The purpose of this Amendment no. 04 is to provide the second site visit notes with additional Questions and Answers (Q&A), and to provide revised Terms Clauses Provisions. NEW ATTACHMENTS ADDED: (1) The solicitation terms, clauses, provisions are revised. Refer to new Attachment no. 1 titled "Amendment 4 Attachment 1 Revised Terms Clauses Provisions." The header section was updated to show all dates for solicitation through Amendment 4. Section III was updated, List of Attachments. (2) Second Site Visit Notes and Q&A is provided in new Attachment no. 14 titled "Amendment 4 Attachment 14 Site Visit 2 and Q and A." QUESTIONS MUST BE SUBMITTED IN WRITING VIA EMAIL. Submit questions to Phaedra Fuller, Contracting Officer. Email address is phaedra_fuller@ios.doi.gov. Please reference the solicitation number in the subject line of the email. The Government reserves the right to cancel this solicitation.