Upgrade Sanitary and Storm Systems at the National Museum of Natural History

Amendment / Modification

This amendment (Amendment 0005) to the solicitation 33330226RF0010002, dated 03/12/2026, is issued to:

• Incorporate SI Responses to RFIs for Questions Nos. 76-82.

• Incorporate Addendum No. 1, including the narrative, specifications, and drawings dated 05/12/2026.

• Extend the Due Date for Receipt of Proposals to June 3, 2026, at 3:00 PM EST.

• The solicitation number cited is for the "NMNH Upgrade Sanitary and Storm Systems" project in Washington, DC.

• Addendum No. 1, dated 05/12/2026, is incorporated into the solicitation.

• The proposal deadline has been extended to June 3, 2026, at 3:00 PM EST.

Amendment / Modification

This document, Amendment 00004, amends Solicitation 33330226RF0010002 for the NMNH Upgrade Sanitary & Storm Systems project.

Key changes include:

• Attachment of Presentation: A presentation detailing the NMNH Upgrade San and Stormwater solicitation concepts is now attached and made part of this amendment.

• Phasing Plan Clarification: The presentation includes a suggested phasing plan. This plan is for informational purposes only and is not mandatory. Offerors may propose alternate sequencing or phasing approaches, provided they meet all contract requirements. The Smithsonian reserves the right to evaluate the feasibility and risk of any proposed phasing approach.

• Acknowledgement of Amendments: Offerors must acknowledge receipt of all amendments to the solicitation, signed and dated, and submit them with their proposal.

• The presentation is a new attachment.

• The guidance on phasing plans has been updated.

• Proposal Due Date Extended: The Due Date for Receipt of Proposals has been extended to May 20, 2026, at 3:00 PM EST.

• Offerors must ensure they acknowledge all amendments with their submission.

Amendment / Modification

This document, Amendment Three, serves to:

• Provide the Smithsonian Institution (SI) Responses to Requests for Information (RFIs) Numbers 1-75, which are attached and made part of this amendment.

• Include an updated Multi-Year Document.

• Remind offerors to acknowledge receipt of all amendments with their proposals.

• SI Responses to RFIs (attached)

• Multi-Year Document (updated)

• Offerors must acknowledge receipt of this amendment.

• The due date for RFIs was Monday, May 4, 2026.

• The due date for proposals is May 20, 2026, at 3:00 PM EST.

• A sign-in sheet for the second site visit held on April 27, 2026, is attached.

• Offerors are instructed to submit questions and clarifications in sequentially numbered sets.

Form / Attachment / Pricing Sheet

This document appears to be a pricing breakdown or cost estimate form for the "NMNH: Upgrade Sanitary & Storms Systems" project. It is designed to capture cost information across multiple fiscal years (FY2026, FY2027, FY2028) and potential options.

• Project Title and Number: "NMNH: Upgrade Sanitary & Storms Systems", SF 73 1600103.
• Estimated Project Range: Over $10M.
• Funding Increments: Details funding available and obligated for FY2026, FY2027, and FY2028.
• Cost Categories: Includes line items for General Conditions, Mobilization, Sitework, Temporary Field Office, Submittals and Shop Drawings, Long Lead Item Purchases, Asbestos Abatement, Demolition, Carpentry, Laser Scanning, Plumbing, Mechanical, Electrical, Metals, Fire Suppression/Fire Protection, Specialties, and As-Builts/O&M/Closeout/Demobilization.
• Termination Costs: A section for Termination Cost (Cancellation Charge) is included for each fiscal year.
• Optional Items: Sections for "BASE TOTAL (FY26-28)", "OPTION 1 (FY27)", "OPTION 2 (FY27)", "OPTION 3 (FY27)", and "UNIT PRICE (Roof Scupper Repair)" are present.
• Instructions: Requires offerors to express costs in words and figures and to describe any deleted/added items.

This document is crucial for bidders to understand the cost structure of the project and to prepare their pricing proposals. It outlines the specific cost categories to be considered and provides a framework for submitting detailed cost breakdowns for each fiscal year and any optional work. Bidders must accurately complete this form to reflect their proposed costs for the project.

Amendment / Modification

This amendment (0002) to Solicitation 33330226RF0010002 modifies the original solicitation as follows:

• Final Walk Through: Rescheduled to Monday, April 27, 2026, at 9:00 AM. The meeting point is the lobby of the National Museum of Natural History (NMNH) off Constitution Ave NW, Washington, DC 20560.
• RFI Due Date: Extended to Monday, May 4, 2026. Questions and clarifications should be submitted in sequentially numbered sets (e.g., set 1 for questions 1-3, set 2 for questions 4-6, etc.) via email to ChanVC@si.edu. Submissions should be in Word format.
• Proposal Due Date: Extended to May 20, 2026, at 3:00 PM EST.

• Section A.1 (Final Walk Through date and time)

• Section A.2 (RFI due date and submission instructions)

• Proposal Due Date (explicitly stated as extended)

• The deadline for submitting RFIs has been extended.

• The final deadline for proposal receipt has been extended.

Amendment / Modification

• Amendment 0001 is issued for Solicitation No. 33330226RF0010002, dated 03/12/2026, concerning the upgrade of Sanitary and Storm Systems at the National Museum of Natural History (NMNH) in Washington, DC.

• The sign-in sheet for the site visit held on March 27 is attached.

• All questions and clarifications must be submitted in sequentially numbered sets, no later than April 14, 2026. Submissions should be in Word format and sent to ChanVC@si.edu.

• The due date for receipt of proposals remains May 12, 2026, at 3:00 PM EST.

• Solicitation Number: 33330226RF0010002

• Site visit sign-in sheet (new attachment)

• Proposal due date

• The deadline for submitting questions and clarifications has been extended to April 14, 2026.

• The proposal submission deadline remains May 12, 2026.

Solicitation / RFP / RFQ

This solicitation is for the "NMNH: Upgrade Sanitary and Storm Systems" project (SF Project # 1600103) at the Smithsonian Institution's National Museum of Natural History (NMNH) in Washington, D.C. The project involves the installation of a new sanitary and stormwater system throughout the Museum Main Building, East and West Wings to replace the existing infrastructure. The work requires extreme care to protect museum collections, exhibits, and research operations, and to preserve historic architectural features.

• Installation of new sanitary and stormwater piping systems.

• Rerouting of stormwater and sanitary piping to avoid sensitive areas.

• Capping of abandoned piping.

• Removal and disposal of old piping.

• Lead and asbestos abatement, as necessary.

• Installation of new sanitary and storm piping within the existing tunnel system.

• Tie-in of new systems to existing SI stormwater and sanitary infrastructure.

• Development and implementation of an erosion and sediment control plan.

• Inspection, sealing, and integration of roof scuppers.

• Work must comply with applicable codes, historic preservation requirements, and safety regulations.

• Contract Type: Firm-fixed-price construction contract.

• Period of Performance: 740 calendar days from the Notice to Proceed.

• Estimated Value: Over $10 million.

• Funding: Multi-year funding across FY26, FY27, and FY28. $8,500,000.00 is set aside for FY26 performance.

• Proposals are due by Tuesday, May 12, 2026, at 3:00 PM Eastern Standard Time.

• Submission format: PDF (one for Technical, one for Cost, one for Subcontracting Plan) uploaded to a provided Dropbox link.

• Pre-proposal meeting and site visit: Friday, March 27, 2026, at 9 AM.

• Questions/clarifications due by April 14, 2026, at 3 PM EST.

• Evaluation will be based on a best-value tradeoff, considering technical factors (Plan of Accomplishment, Past Performance, Safety Performance, Key Personnel and Subcontractors) and cost.

• Subcontracting goal: 40% participation by small business concerns, with 7% allocated to service-disabled small business concerns.

• Offerors must demonstrate satisfaction of minimum qualifications.

• The solicitation includes Drawings and Specifications dated December 5, 2025.

• Options 1-3 for additional scope of work are included and will be evaluated for award purposes.

• The Smithsonian Institution reserves the right to cancel the RFP without prior notice.

Form / Attachment / Pricing Sheet

This document is Standard Form 25A, a Payment Bond. It is used to ensure that the Principal (contractor) makes payments to all persons furnishing labor and material for the prosecution of the work provided for in a contract. This form is prescribed by the General Services Administration (GSA) and the Federal Acquisition Regulation (FAR).

• Principal: Information about the contractor, including name, address, and type of organization.
• Surety(ies): Information about the surety company or companies providing the bond, including name, address, state of incorporation, and liability limit.
• Penal Sum of Bond: The maximum amount the surety is liable for.
• Contract Date & Number: Identifies the specific contract the bond is associated with.
• Obligation & Conditions: Outlines the terms under which the bond is valid, primarily focusing on prompt payment for labor and materials.
• Witness: Section for signatures and seals of the Principal and Surety(ies).

This form is a required attachment for certain government contracts. Bidders may need to complete and submit this form as part of their proposal or upon contract award, depending on the specific solicitation requirements. It demonstrates the contractor's financial commitment to paying subcontractors and suppliers.

Form / Attachment / Pricing Sheet

This document is a "Release of Claims" form (OCON FORM ROC-1, Revised January 2001) used for payment under a Fixed Price Construction Contract. It requires the contractor to release the Smithsonian Institution from any and all claims arising under or by virtue of the contract, except as specified.

• Contractor's contract number and date.
• A section to itemize any claims and amounts due. If none, the contractor must state so.
• Signature, printed name, and seal of the undersigned contractor.
• Witness section requiring two witnesses with their names and addresses.
• A note regarding separate releases required from assignees if the contractor's claim has been assigned.

This form is likely required to be submitted by a contractor as part of the payment process for a fixed-price construction contract. Bidders should be aware that they may need to complete and submit this form to receive payment, and it signifies their release of claims against the Smithsonian Institution.

Form / Attachment / Pricing Sheet

This document appears to be a multi-year funding breakdown and cost estimation form for the "NMNH: Upgrade Sanitary & Storms Systems" project (Project Number: SF 73 1600103). It requires offerors to provide cost estimates for various components across different fiscal years (FY2026, FY2027, FY2028) and potential options.

• FY2026 Funding Increment: Details costs for General Conditions and Mobilization, with a subtotal and space for termination costs and other adjustments. It also asks for identification of long-lead time items.
• FY2027 Funding Increment: Breaks down costs for Sitework, Temporary Field Office, Submittals, Long Lead Item Purchases, Asbestos Abatement, Demolition, Carpentry, Laser Scanning, Plumbing, Mechanical, Electrical, Metals, Fire Suppression/Fire Protection, and Specialties, with a subtotal and space for adjustments.
• FY2028 Funding Increment: Similar breakdown to FY2027, including "As-Builts, O&M, Closeout, Demobilization, etc."
• Base Total (FY26-28): Requires a total cost for the base period.
• Options (FY27): Includes three distinct options (Option 1, 2, 3) for which cost estimates are required.
• Instructions: Offerors are instructed to express costs in words and figures and to clearly describe any items deleted or added to the funding phases.

This document is crucial for bidders to understand the estimated funding allocation for the project over multiple years and to prepare their detailed cost proposals. It outlines the specific cost categories and line items that need to be priced, including potential options, which will directly impact proposal development and evaluation.

Form / Attachment / Pricing Sheet

This document contains Volume 2 of the bid set drawings, specifically focusing on plumbing for the "UPGRADE SANITARY AND STORM SYSTEMS" project at the National Museum of Natural History. It details plumbing plans and specifications.

• Volume 2 - Plumbing: Contains all plumbing-related drawings.
• Project Information: Includes project title, Smithsonian Facilities Project Number (1600103), EwingCole Project Number (20190809), and location (National Museum of Natural History, Washington, D.C.).
• Drawing Index: Lists drawings by discipline (Hazmat, Civil, Interiors, Structural, HVAC, Plumbing, Electrical, Fire Protection, Fire Alarm).
• Plumbing Details: Includes general notes, logistics, phasing plans, demolition plans for various building sections, riser diagrams, storm water calculations, symbol legends, and abbreviations.
• Plans: Detailed plans for multiple building levels (Basement/Utility Tunnel, Ground Floor, Mezzanine, First to Sixth Floors, Attic, Roof) across North Hall, East Hall, West Hall, East Wing, and West Wing.
• Risers: Storm and Sanitary Riser Diagrams for North Hall, East Hall, East Wing, and West Wing.
• Details: Plumbing details, fixture schedules, pipe specifications, and water heater/backflow preventer schedules.

This document is critical for bidders to understand the scope, technical requirements, existing conditions, and specific details of the plumbing aspects of the project. It provides the detailed layout, pipe sizing, fixture types, and installation requirements necessary for accurate cost estimation, construction scheduling, and ensuring compliance with all specified requirements for the sanitary and storm system upgrades.

Form / Attachment / Pricing Sheet

This document is a bid summary spreadsheet for the "Upgrade Sanitary & Storm Systems" project (Project Number: 1600103) at the National Museum of Natural History (NMNH). It outlines the cost breakdown for the base bid and three optional work items.

• Base Bid: Covers all work for upgrading the sanitary & storm system in the main building.
• Option 1: Work associated with upgrading the sanitary & storm system in the West Wing.
• Option 2: Work associated with upgrading the sanitary & storm system in the East Wing.
• Option 3: Roof scupper repair involving epoxy repairs post-storm piping installation in the main building attic.
• Each section includes a breakdown by CSI divisions (e.g., General Conditions, Existing Conditions, Concrete, Plumbing, HVAC, Electrical, Earthwork, Utilities) for Material, Labor, Equipment, and Overhead & Profit.
• All cost breakdowns for Material, Labor, Equipment, Overhead & Profit, and Total are currently listed as $0 for all divisions and options.

This spreadsheet serves as a template for bidders to input their cost estimates for the base project and potential optional work. While currently populated with zeros, it details the scope of work for each component and the required cost breakdown structure. Bidders should use this to prepare their pricing proposals according to the specifications and drawings dated December 5, 2025.

Form / Attachment / Pricing Sheet

This document is a Performance Bond (Standard Form 25) required for government contracts. It serves as a guarantee that the principal (the contractor) will fulfill the terms and conditions of the contract. The bond protects the government against financial loss if the contractor defaults.

• Principal: Information about the contractor, including legal name, business address, and type of organization.
• Surety(ies): Information about the surety company or companies providing the bond, including name, address, and liability limit.
• Penal Sum of Bond: The maximum amount the surety is liable for under the bond.
• Obligation: Details the conditions under which the bond is void (i.e., if the principal performs the contract and pays required taxes).
• Witnesses: Signatures and identifying information for the principal and surety(ies).

Bidders will need to understand the requirements for providing a performance bond as part of their contract obligations. This form outlines the information that must be provided by both the contractor (Principal) and the surety company. It is crucial for bidders to secure a surety that meets the government's requirements and to ensure the bond is executed correctly to avoid delays or disqualification.

Form / Attachment / Pricing Sheet

This document, Volume 1 of the "BID SET - DRAWINGS" for the "UPGRADE SANITARY AND STORM SYSTEMS" project at the National Museum of Natural History, contains a comprehensive index and detailed architectural and engineering drawings. It outlines the scope of work for upgrading sanitary and storm systems, including restroom renovations, partition construction, casework installation, and structural modifications.

• Drawing Index: Organizes drawings by volume and discipline (General, Civil, Hazmat, Architectural, Interiors, Structural, HVAC).
• Project Scope: Details work for sanitary and storm system upgrades, focusing on restroom renovations, demolition of existing elements, and new construction.
• Specific Areas: Includes plans for multiple floors (Basement to Roof) and specific locations such as East and West Wings, Main Building, East Court, and various labs.
• Construction Details: Provides detailed floor plans, elevations, demolition plans, reflected ceiling plans, partition details, casework details, and structural notes.
• Materials & Specifications: Outlines specific materials, dimensions, fire ratings, and installation requirements.
• Demolition: Clearly indicates areas and items for removal, including walls, fixtures, ceilings, and accessories.
• Coordination: Emphasizes coordination with structural, mechanical, electrical, and plumbing drawings.

This document is critical for bidders to understand the full scope of the project, including the specific locations, materials, and construction methods required. It provides the visual and technical information necessary for accurate cost estimation, project planning, and ensuring compliance with design specifications for the sanitary and storm system upgrades.

Form / Attachment / Pricing Sheet

This document contains detailed drawings and plans related to the "Upgrade Sanitary and Storm Systems" project at the National Museum of Natural History. It is Volume #3, focusing on Electrical, Fire Protection, and Fire Alarm systems.

• Drawing Index: Lists all drawings included in Volume #3, organized by discipline (Electrical, Fire Protection, Fire Alarm).
• Electrical Plans: Includes demolition plans, power plans, and lighting plans for various areas across multiple floors.
• Fire Protection Plans: Details for fire protection systems.
• Fire Alarm Plans: Details for fire alarm systems.
• Legends and Abbreviations: Provides definitions for symbols, abbreviations, and general notes applicable to the electrical drawings.
• Panelboard Schedules: Lists the specifications and load summaries for various electrical panelboards.
• Luminaire Schedule: Details the types, manufacturers, and specifications of lighting fixtures.
• Electrical Details: Provides specific installation details for electrical components.
• Fire Protection Details: Specific installation details for fire protection systems.

This document is crucial for bidders to understand the scope and technical requirements of the electrical, fire protection, and fire alarm systems for the "Upgrade Sanitary and Storm Systems" project. It provides the detailed plans necessary for accurate bidding, material procurement, and execution of the work.

Specifications

This document, "SPECIFICATIONS VOLUME 1 - DIVISION 01 - GENERAL REQUIREMENTS," outlines the supplementary conditions for construction for Project No. 1600103, "Upgrade Sanitary and Storm Systems" at the National Museum of Natural History. It details project information, scope of work, contract time, bid/proposal schedule, site examination requirements, and availability of documents.

• Project Summary and Information: Includes project details, Smithsonian Institution contacts, and architect information.

• Summary of Work: Outlines the contractor's responsibilities for supervision, labor, materials, and equipment for the upgrade of sanitary and storm systems.

• Contract Time for Completion: Work to commence within ten (10) calendar days after Notice to Proceed and be completed within 730 days after Notice to Proceed.

• Schedule of Options for Bid/Proposal: Details three options for the work, including base proposal and add-ons for specific building areas.

• Bidder/Offeror Examination of Site: All bidders must examine the premises to complete the project.

• Availability of Documents: Successful contractor will be supplied with electronic copies of all drawings and specifications.

• Not explicitly stated, but implies a construction contract.

• Criteria for Product Selection: Products must be compatible with other materials and suitable for intended use.

• Submittals: Requirements for submittal definitions, submittals and reviews, and progress photographs.

• Not specified in this section.

• The document is Volume 1, Division 01 of a larger set of specifications.

Specifications

This document contains specifications for Project No. 1600103, titled "Upgrade Sanitary and Storm Systems" at the National Museum of Natural History. It is Volume 2, Division 21-33 of the project specifications. The document is dated December 5, 2025, and is issued for bid. It includes a Table of Contents for Volume 1, which covers General Requirements and Contractor Use of Premises, as well as Project Coordination, Protection of the Site, Temporary Construction Facilities, Meetings, and Submissions. It also details Safety, Health, and Fire Protection, Security Requirements, Schedules and Payments, and Project Closeout Requirements. Volume 2, Division 21-33, covers Fire Suppression, Plumbing, Heating, Ventilating, and Air Conditioning, Integrated Automation, Electrical, Electronic Safety and Security, Earthwork, Exterior Improvements, and Utilities. Appendix A contains a Limited Regulated Materials Survey Report.

• Project Details: Project No. 1600103, "Upgrade Sanitary and Storm Systems," National Museum of Natural History.
• Document Structure: Divided into Volume 1 (General Requirements, Special Project Requirements, Contractor Use of Premises, Project Coordination, Site Protection, Temporary Facilities, Meetings, Submissions, Safety, Security, Schedules, Project Closeout) and Volume 2 (Fire Suppression, Plumbing, HVAC, Electrical, Earthwork, Exterior Improvements, Utilities).
• Key Sections: Includes detailed specifications for various systems such as fire suppression, plumbing, HVAC, electrical, earthwork, exterior improvements, and utilities.
• Attachments: Appendix A includes a Limited Regulated Materials Survey Report.

This document provides the detailed technical specifications for the "Upgrade Sanitary and Storm Systems" project. Bidders must review these specifications to understand the full scope of work, material requirements, installation standards, and performance criteria for all systems involved in the project. This includes, but is not limited to, requirements for plumbing, HVAC, electrical, earthwork, exterior improvements, utilities, and fire alarm systems. Understanding these specifications is crucial for accurate bidding and successful project execution.

Form / Attachment / Pricing Sheet

This document is Appendix A, "Specifications," for Project No. 1600103, "Upgrade Sanitary and Storm Systems" at the National Museum of Natural History. It provides detailed specifications for the project.

• Project Number: 1600103
• Project Title: Upgrade Sanitary and Storm Systems
• Facility: National Museum of Natural History
• Date: 12/05/25
• Approval: Project is approved in conformance with Smithsonian Directive (SD) 410.
• Approving Official: Michael J. Carrancho, P.E., Deputy Director

This document provides critical technical specifications that bidders must adhere to when preparing their proposals and executing the project. It outlines the detailed requirements for the upgrade of sanitary and storm systems, ensuring compliance with Smithsonian directives.

Form / Attachment / Pricing Sheet

This document is the "Project Manual" for the "Upgrade Sanitary and Storm Systems" project at the Smithsonian Institution's National Museum of Natural History. It serves as a comprehensive guide for the project, detailing the scope of work, design criteria, and implementation plans.

• Executive Summary: Provides an overview of the project's necessity and the proposed path forward for addressing failing storm and sanitary systems.
• Program Summary: Details the types of spaces affected and the scope of work within them.
• Schedule: Outlines the construction schedule, including phased implementation and specific task durations.
• Cost Model: States that a cost estimate is provided separately.
• Architecture: Describes the existing conditions, regulatory criteria, and the architectural approach to the upgrades.
• Interior Design: Details the interior finishes and materials for renovated spaces.
• Structural: Outlines applicable codes, existing conditions, and structural design criteria.
• Mechanical: Covers applicable codes, climate conditions, design criteria, HVAC systems, and controls.
• Plumbing: Details applicable codes, existing conditions, design criteria for storm drainage, sanitary waste and vent, potable water systems, and plumbing fixtures.
• Electrical: Lists applicable codes and standards, existing conditions, and new electrical work required.
• Sustainability: Outlines the project's adherence to sustainability guidelines, focusing on LEED principles, life cycle considerations, and water consumption reduction.
• Hazmat: Summarizes previous evaluations of hazardous materials and the development of project-specific hazmat guidance.
• Civil: Describes existing site conditions, proposed exterior connections, and permitting requirements.
• Project Team: Lists the architect/engineer/interior designer and specialty consultants involved.

This document provides a detailed overview of the project's scope, requirements, schedule, and design considerations. Bidders can use this manual to understand the full extent of the "Upgrade Sanitary and Storm Systems" project, assess their capability to perform the work, and prepare a comprehensive proposal. It highlights the specific areas of the museum affected, the systems to be upgraded, and the overall project timeline.

Other / Unclassified

This document is a General Decision Number (DC20260002) for building construction projects in the District of Columbia. It lists prevailing wage rates and fringe benefits for various construction trades, including Asbestos Worker, Bricklayer, Carpenter, Electrician, Elevator Mechanic, Ironworker, Laborer, Marble/Stone Mason, Terrazzo Worker/Setter, Tile Setter, Glazier, Painter, Plasterer, Cement Mason/Concrete Finisher, Plumber, Pipefitter, Roofer, Sprinkler Fitter, and Sheet Metal Worker.

This document is crucial for bidders on construction projects in the District of Columbia that are subject to the Davis-Bacon Act. It specifies the minimum wage rates and fringe benefits that must be paid to laborers and mechanics employed on such projects. Bidders must use this information to accurately estimate labor costs and ensure compliance with federal labor laws when preparing their proposals. The document also includes notes on Executive Orders related to paid sick leave and minimum wage for federal contractors, which may impact contract requirements.