Replace 2 Air Handling Units at the National Agricultural Library

Amendment / Modification

• Adds Attachment 5: Questions from Industry (provides responses to received questions).

• Adds Attachment 6: NAL Hydrant Report.

• Extends the solicitation due date by two days to May 7, 2026.

• Solicitation due date.

• Attachments to the solicitation.

• The proposal submission deadline has been extended to May 7, 2026.

• Bidders must acknowledge this amendment by signing block 15 and returning one signed electronic copy, or by acknowledging Amendment 0002 on their SF 1442. Failure to do so may result in the vendor being deemed technically unacceptable.

• The Period of Performance remains 07/01/2026 to 06/30/2027.

Questions & Answers / Clarifications

This document provides responses to industry questions regarding the "Questions from Industry 1232SA26Q0412" opportunity, dated April 21, 2026. It clarifies various specification and drawing details to assist bidders in preparing their proposals.

• Quality Control Manager (QCM) & SSHO: The SSHO may also serve as the QCM.
• Building Automation System: The existing Siemens system will be extended; Niagara/Tridium is specified.
• Duct Leak Testing: Testing is required only for new ductwork within mechanical rooms where AHU-4 and AHU-5 are located.
• Grooved Piping: Grooved connections are acceptable for pipes larger than 2-1/2 inches.
• 3rd Party Commissioning: Required, and the government will hire the commissioning provider (CxC).
• AHU-4/AHU-5 Work: These units cannot be worked on simultaneously and will require phased work.
• Hazardous Materials: AERO EH&S survey confirmed ACM and lead-containing paint in AHU-4 and AHU-5 work zones. The complete report is in the specification.
• Humidifier Dispersion Manifold: To be provided as part of the contract per the humidifier schedule.
• UV Lights: Specifications for UV-C Germicidal Emitters (intensity, lamp type, etc.) have been attached.
• Steam Supply: There is no existing steam in the building; self-contained, electrode steam humidifiers are to be provided.
• Chilled Water System: The existing system has sufficient capacity, and modifications are excluded from the contract.
• Work Hours: Standard work hours are Monday-Friday, 7:30 AM–4:30 PM. After-hours/weekend work, downtime, and disruptive work must be coordinated and scheduled in advance.
• Temporary Enclosure: The area way will need to be temporarily enclosed and locked at the end of each workday.

These clarifications address specific technical requirements, material acceptability, scope boundaries, and scheduling, which are crucial for bidders to accurately price and plan their proposals. No changes to proposal deadlines were mentioned.

Form / Attachment / Pricing Sheet

This document is a "Private Fire Hydrant Inspection and Testing Form" used to record the inspection and testing of private fire hydrants. It serves as a record of the hydrant's condition and operational status.

• Property Owner Information: Details about the property owner, mailing address, and property name.
• Physical Address: Location of the hydrant.
• Owner's Section: Questions regarding the hydrant's service status, recent activation, and presence of a fire pump.
• Fire Hydrant Inspection Items: A checklist of 13 items to assess the physical condition and accessibility of the hydrant, including wrench availability, obstructions, condition of parts, and paint.
• Testing Section: Records the results of hydrant flow tests, including duration, drainage, valve operation, backflow assembly tests, and mainline strainer condition.
• Pressure Readings: Static, residual, pitot, and velocity pressures are recorded.
• Water Quality Tests: Fields for Total Chlorine and Dechlorinization Residual.
• Inspector Information: Details about the inspection date, company, inspector, and person performing the work.

This form is relevant to bidders as it details the specific requirements and standards for private fire hydrant maintenance and testing. Understanding these requirements can inform bidders about the operational readiness and maintenance expectations for facilities where such hydrants are present. The data recorded on this form can indicate the current state of critical fire suppression infrastructure.

Amendment / Modification

• This amendment incorporates the mandatory contract clause FAR 52.222-90, "Addressing DEI Discrimination by Federal Contractors (Apr 2026)," as required by Executive Order 14398.

• Bidders must return one signed electronic copy of this amendment with their bid or acknowledge Amendment 0001 on their SF 1442.

• Failure to sign or acknowledge this amendment will result in the vendor being deemed technically unacceptable per Factor #22.

• The Period of Performance remains unchanged: 07/01/2026 to 06/30/2027.

• The entire solicitation is affected by the incorporation of the new clause and the acknowledgment requirement.

• Bidders are required to acknowledge this amendment. Failure to do so may lead to technical unacceptability. The deadline for offers is not explicitly extended by this amendment, but acknowledgment is required prior to submission.

Form / Attachment / Pricing Sheet

This document is a sign-in roster for a site visit related to the "Replace AHU's at NAL, RFQ" opportunity (Solicitation Number: 1232SA26Q0412).

• Lists registered contractors who attended the site visit.
• Includes the Point of Contact (POC) name(s) for each contractor.
• Provides space for signatures, indicating attendance.
• Includes additional handwritten entries for contractors not on the pre-printed list.

This roster indicates which contractors have already visited the site. This information may be useful for understanding potential competition or for identifying other interested parties in the opportunity.

Statement of Work (SOW) / Performance Work Statement (PWS)

The objective of this project is to completely replace the two existing Air Handler Units (AHU-4 and AHU-5) at the National Agricultural Library (NAL) in Beltsville, MD, according to the provided 100% Design Package.

• Demolition: Removal of existing AHU-4 and AHU-5, including associated components such as housing, frames, piping, pumps, VFDs, and controls.

• Installation: Supply and installation of new AHU-4 and AHU-5, including all associated components.

• Ancillary Systems: Installation of new VAV terminals in existing ductwork, and integration of new AHU controls into the existing Building Automation System (BAS).

• Temporary Cooling: Provision and installation of temporary cooling for specific office areas during construction.

• Commissioning: Commissioning of new systems in coordination with the Commissioning Authority (CxA).

• Services: The contractor shall provide all necessary services, field labor, equipment (cranes, rigging, etc.), materials, testing, and personal protective equipment. No government equipment or services will be provided.

• Place: National Agricultural Library (NAL), 10301 Baltimore Ave, Beltsville, MD 20705.

• Period of Performance (POP): 180 Calendar Days after receiving the Notice to Proceed (NTP).

• Work Hours: Generally Monday - Friday, 7:30 am to 4:30 pm, except Government Holidays. Changes require written CO approval.

• Occupied Facility: The facility will be occupied during construction. The contractor must minimize impact on daily operations and ensure the building remains functional. Limited outages are permissible.

• Site Visit: A mandatory site visit is required to submit a technically acceptable quote.

• Codes and Standards: Work must comply with specified codes including ARS Facility Design Standards, IBC-2021, IEBC-2021, ASCE 7-16, AISC 360-16, AWS D1.1/D1.1M:2015, ADA, AMCA, ANSI, ASHRAE, ASME, EPA, NEC, NFPA, OSHA, RCRA, and SMACNA.

• Permits & Licenses: Contractor is responsible for obtaining all necessary permits and licenses.

• Quality Control: Contractor is exclusively responsible for quality control. Continuous audit by COR and LM.

• Safety: Contractor must comply with all safety codes and submit a Site-Specific Safety Plan (SSSP) within 14 days of award. Contractor is responsible for site safety and security.

• Housekeeping: Maintain a clean site, free of debris, and restore disturbed areas. Daily and weekly waste disposal required.

• Documentation: Submittals (shop drawings, product data, O&M data, etc.) are required in advance of material use. Review periods are 7 days for contractor and 14 days for Government.

• Warranty: One (1) year guarantee for workmanship and material failures from the date of final acceptance.

• Project Schedule: Contractor must provide a CPM project schedule within 7-14 calendar days of award.

• COR: Jim Glick (443-310-0559, jamesglick@usda.gov)

• LM: Jermaine Winstead (301-504-9817, jermaine.winstead@usda.gov)

• NAL Replace AHU 4 and 5 – 100% Drawings (IFC)

• NAL Replace AHU 4 and 5 – 100% Specifications (IFC)

Specifications / Attachment

This document contains specifications for the "Replace Air Handling Units (AHU) 4 and 5" project at the National Agricultural Library (NAL) in Beltsville, MD. It details the technical requirements for the replacement of AHU-4 and AHU-5, including associated return fans, VAVs, electrical connections, and fire protection for sprinkler piping.

• Section 01 11 00 - Summary of Work: Outlines the scope of work, including demolition of AHU-4 and AHU-5, and provision of new units with associated components.
• Section 01 14 00 - Work Restrictions: Details limitations on work hours, contractor access, and general activity regulations.
• Section 01 20 00 - Price and Payment Procedures: Outlines requirements for the Schedule of Prices and payment processing.
• Section 01 30 00 - Administrative Requirements: Covers references, submittals, insurance, supervision, preconstruction meetings, and partnering.
• Section 01 33 00 - Submittal Procedures: Details the process for submitting shop drawings, product data, samples, and other required documentation.
• Section 01 35 26 - Governmental Safety Requirements: Outlines safety requirements, including references to various industry standards and definitions for competent persons and high-risk activities.
• Section 01 42 00 - Sources for Reference Publications: Lists organizations and their publications referenced in the specifications.
• Section 01 45 00.10 20 - Quality Control for Minor Construction: Details the requirements for the Quality Control program, including organization, submittal procedures, and testing.
• Section 01 50 00 - Temporary Construction Facilities and Controls: Covers requirements for temporary facilities, cybersecurity, signage, traffic control, fencing, and wiring.
• Section 01 57 19 - Temporary Environmental Controls: Outlines requirements for environmental protection, including waste management, pollution prevention, and air resources.
• Section 01 74 19 - Construction Waste Management and Disposal: Details requirements for managing and disposing of construction waste, including diversion goals and reporting.
• Section 01 78 00 - Closeout Submittals: Specifies requirements for as-built drawings, record drawings, source drawing files, and submittals.
• Section 01 78 23 - Operation and Maintenance Data: Outlines requirements for O&M data packages, including content, format, and submission.
• Section 01 91 00.15 20 - Total Building Commissioning: Describes the commissioning process for HVAC systems.
• Section 23 03 00.00 20 - Basic Mechanical Materials and Methods: Covers general requirements for mechanical materials and equipment.
• Section 23 05 15 - Common Piping for HVAC: Details requirements for piping systems used in HVAC.
• Section 23 09 00 - Instrumentation and Control for HVAC: Specifies requirements for instrumentation and control system components.
• Section 23 09 13 - Instrumentation and Control Devices for HVAC: Details requirements for specific control devices.
• Section 23 09 23.02 - BACnet Direct Digital Control for HVAC and Other Building Control Systems: Outlines requirements for BACnet DDC systems.
• Section 23 22 26.00 20 - Steam System and Terminal Units: Details specifications for steam systems and terminal units.
• Section 23 30 00 - HVAC Air Distribution: Covers requirements for air distribution systems.
• Section 23 64 26 - Chilled, Chilled-Hot, and Condenser Water Piping Systems: Details specifications for chilled, chilled-hot, and condenser water piping.
• Section 23 07 00 - Thermal Insulation for Mechanical Systems: Outlines requirements for thermal insulation.
• Section 26 20 00 - Interior Distribution System: Covers requirements for interior electrical distribution systems.
• Section 26 29 23 - Adjustable Speed Drive (ASD) Systems Under 600 Volts: Details requirements for ASD systems.
• Section 28 31 76 - Interior Fire Alarm and Mass Notification System, Addressable: Specifies requirements for the fire alarm and mass notification system.
• Section 02 41 00 - Demolition: Outlines requirements for demolition and deconstruction.
• Section 02 82 00 - Asbestos Remediation: Details requirements for asbestos abatement.
• Section 02 83 00 - Lead Remediation: Details requirements for lead remediation.
• Section 03 30 53 - Miscellaneous Cast-in-Place Concrete: Specifies requirements for cast-in-place concrete.
• Section 07 84 00 - Firestopping: Details requirements for firestopping systems.
• Section 09 90 00 - Paints and Coatings: Outlines specifications for painting and coatings.

This document is a compilation of specifications and does not represent a solicitation or RFP. It details the technical requirements for the replacement of air handling units and associated systems.

Form / Attachment / Pricing Sheet

This document contains detailed architectural and engineering drawings for the "Replace Air Handling Units AHU-4 and AHU-5" project at the U.S. Department of Agriculture, Agricultural Research Service, Facilities Division in Beltsville, Maryland. It includes site plans, floor plans, demolition plans, enlarged details of mechanical rooms, fire alarm and suppression system layouts, control diagrams, schedules, and electrical single-line diagrams.

• Mechanical Drawings (M-series): Detailed plans for replacing Air Handling Units (AHUs) AHU-4 and AHU-5, including demolition, enlarged details, and schematics for HVAC systems, piping, and controls.
• Fire Alarm & Suppression Drawings (FA/FD/FX-series): Plans detailing the fire alarm system modifications and sprinkler system layouts, including demolition and new installations.
• Electrical Drawings (E-series): Plans for lighting, power distribution, and single-line diagrams for the project.
• Schedules (M-601, E-601, E-602): Detailed specifications for air handling units, fans, variable air volume boxes, motors, equipment, and panelboards.
• Control Diagrams (M-700, M-701, M-702): Schematics and sequences of operation for the building's control systems, including VAV box controls and AHU sequences.
• Details (M-501): Specific installation details for components like humidifiers, coils, and equipment pads.

These drawings are critical for bidders to understand the scope of work, including the demolition of existing AHUs and associated systems, the installation of new AHUs, and the integration of HVAC, fire alarm, fire suppression, and electrical systems. They provide the precise locations, dimensions, and specifications required for accurate bidding and execution of the project.

Solicitation / RFP / RFQ

This solicitation is for the replacement of two existing Air Handling Units (AHU-4 and AHU-5) at the National Agricultural Library in Beltsville, MD. The project requires adherence to a 100% Design Package.

• Replacement of two existing Air Handling Units (AHU-4 and AHU-5).

• Work must be performed according to the 100% Design Package.

• Adherence to all Federal Acquisition Regulation (FAR) and USDA Acquisition Regulation (AGAR) clauses and provisions.

• Compliance with specific clauses related to construction, labor standards, environmental protection, and safety.

• Award Type: Firm Fixed-Price contract.

• Period of Performance: 180 days after Notice to Proceed (NTP).

• NTP will be issued after approval of all required submittals and on-site start work by the COR.

• Submission Deadline: May 5, 2026, by 4:00 PM EST.

• Offers must be submitted electronically to david.hildebrand@usda.gov.

• Evaluation Criteria: Lowest Priced Technically Acceptable (LPTA).

• Key Milestones:

  • Mandatory Site Visit: April 14th, 2026, at 9:00 AM EST.
  • Site Visit Registration Deadline: April 13th, 2026, 5:00 PM EST.

• Required Submission Documents:

  • Transmittal Summary Letter (including POC, SAM UEI).
  • Completed and signed SF 1442 and acknowledgements of amendments.
  • Fully executed SF 24 Bid Bond (20% of proposed price, not to exceed $300,000).
  • Two (2) recent and relevant experience references.

• Competition is set aside for Total Small Business.

• Applicable NAICS code: 238220 (Plumbing, Heating and Air Conditioning Contractors).

• Offerors must be registered with the System for Award Management (SAM.gov) at the time of quote submission.

• Attachments to the solicitation include: Statement of Work, Specifications, Drawings, and Wage Determination.

Form / Attachment / Pricing Sheet

This document is a General Decision for wage rates applicable to building construction in Prince George's County, Maryland. It serves as a reference for prevailing wages that must be paid on federal or federally funded construction projects covered by the Davis-Bacon Act.

• General Decision Number: MD20260121
• Publication Date: 01/02/2026
• State: Maryland
• County: Prince George's County
• Construction Type: Building
• Classifications: Lists various construction trades and labor classifications (e.g., Bricklayer, Carpenter, Electrician, Laborer, Painter, Plumber, Truck Driver).
• Rates: Provides the prevailing hourly wage rate for each classification.
• Fringes: Details the hourly fringe benefit rate for each classification.
• Executive Orders: Includes notes on Executive Order 13706 (Paid Sick Leave) and Executive Order 13658 (Minimum Wage for Federal Contractors), outlining requirements for contractors.
• Appeals Process: Describes the procedure for appealing wage determinations.

Bidders must use this document to understand the minimum wage requirements for laborers and mechanics employed on covered construction projects. This information is crucial for accurately estimating labor costs in proposals and ensuring compliance with federal labor laws. Failure to adhere to these wage rates can result in penalties.