Building 215 Clean Room HEPA Filter Replacement

Amendment 0004: The purpose of this Amendment 0004 is to:

Provide government responses to RFI's (attached). Incorporate attachment "RFI IDs 33-36 Images_Compressed. Attachment will be uploaded to SAM.gov. Provide a copy of the 2nd site visit sign-in sheet (attached). Extend the deadline for receipt of quotations to 1:00PM ET on August 12, 2026.

Amendment 0003: The purpose of this Amendment 0003 is to Extend the deadline for receipt of quotations to 1:00PM ET on August 7, 2026. Schedule an additional site visit for prospective Quoters. The site visit is scheduled for 9:00AMET on July 27, 2026. See the attached “Information Regarding Site Visit and RFIs” for details. Extend the deadline for submission of Questions and Requests for Information (RFIs) to July 29, 2026. See the attached “Information Regarding Site Visit and RFIs” for details.

Replace Sections L.1- Instructions to Offerors, and Section M.1 Basis for Award, of the solicitation. Quoters shall prepare and submit quotations in accordance with the amended instructions and evaluation criteria contained in this amendment. Make changes regarding provisions and clauses: A copy of the Amendment has been uploaded.

END OF AMENDMENT 0003 Amendment 0002: The purpose of this Amendment 0002 is to provide government responses to RFI's and provide a copy of the site visit sign-in sheet. A copy of the Amendment has been uploaded. All other terms and conditions remain unchanged.

END OF AMENDMENT 0002 Amendment 0001: The solicitation documents originally posted to SAM.gov on [DATE OF ORIGINAL POSTING] were uploaded in error and do not pertain to this acquisition. The Government has removed the incorrect documents and has uploaded the complete and correct solicitation package associated with Solicitation No. 1333ND26RNB190014.

Offerors are advised to disregard all solicitation documents posted prior to this amendment and shall rely solely upon the solicitation documents, specifications, drawings, attachments, and other information provided with this amendment and any subsequent amendments.

END OF AMENDMENT 0001 The National Institute of Standards and Technology (NIST) located in Gaithersburg, MD is requesting proposals from qualified Small Businesses to be evaluated and considered for award of the project titled "Buidling 215 Clean Room HEPA Filter Replacement". See attached documents for details. A pre-proposal site visit is scheduled for Monday, June 15, 2026, at 9am EST. All attendees must be registered in advance of the site visit.

See attachment titled "Information regarding Site Visit and RFI's" for details. In accordance with FAR 19.502-10, if this small business set-aside acquisition is not awarded, the unilateral determination to set the acquisition aside shall be automatically dissolved for the unawarded portion of the set-aside.