Repairs to Greenhouse/Headhouse Ventilation and Cooling Systems Raleigh NC

The work includes but is not limited to: The contractor shall provide all labor, supervision, tools, equipment, and materials necessary to replace nine (9) evaporator coolers, eleven (11) exhaust fans remove and wiring/conduit for air intake louvers throughout three greenhouses and a headhouse, located at the USDA-ARS Plant Science Research facility, 3120 Ligon St., Raleigh, NC., 27606. All work shall be performed in accordance with the terms, conditions, drawings and specifications contained in this document. Scope Statement: The USDA-ARS Plant Science Research facility at 3127 Ligon St, Raleigh, NC 27606 seeks contractor services to replace nine (9) evaporative coolers, eleven (11) exhaust fans, and wiring/conduit for air intake louvers throughout three greenhouses and a headhouse. The contractor shall include all services and field labor, equipment (manlifts and rigging as needed), materials, testing and personal protective equipment necessary to perform the work. No Government equipment will be available for use by the contractor. This project is to replace nine (9) evaporative coolers, eleven (11) exhaust fans, and wiring/conduit for air intake shutters throughout three greenhouses and a headhouse. The evaporative coolers have developed extensive leaks and have lost cooling capacity. Water has entered the conduit serving the air intake louver motors and has damaged the wire within. The exhaust fans in one greenhouse and the headhouse are old and do not meet current efficiency standards. This turnkey project consists of the following elements: 1. Remove existing evaporative cooling systems in three greenhouses, (9 total) and replace with new equipment per the specifications in this document. 2. Remove existing exhaust fan assemblies in Greenhouse #2 (7 total) and replace with new equipment per the specifications in this document. 3. Remove existing conduit and wiring between disconnect switch and intake actuator motors in three greenhouses and replace with new conduit and wiring. Statement of Work USDA, Agricultural Research Service 4. Remove existing exhaust fan assemblies in the headhouse breezeway (4 total) and replace with new equipment per the specifications in this document. 5. Perform electrical and mechanical checkout of the new system to ensure all steps have been completed according to the manufacturer’s documentation. 6. Provide start-up services by the manufacturer’s field service representative to commission the new system. 7. Provide training for the new system by the manufacturer’s field service representative. The facility will be occupied during construction activities. Power outtages to accommodate electrical tie-ins are to be scheduled in advance and coordinated with the facility representative to minimize the disruption to daily operations and research programs. Equipment and Install Specifications Exhaust Fans (Greenhouse 2): Exhaust fans in greenhouse 2 shall be replaced with American Coolair Model CBL/NBF 36 or equivalent. Exhaust fans shall include: • motor/propeller assembly • metal housing • angled discharge hood • intake louvers • PVC coated wire guard on intake and discharge • wiring/conduit from fan motor to disconnect switch Contractor shall include modifications to greenhouse glazing necessary to facilitate proper installation. Opening in greenhouse wall for existing motors measures approximately 36"x36". Motors are single phase, 115V. Exhaust Fans (Headhouse): Exhaust fans in headhouse shall be replaced with new belt driven fan assemblies rated at or exceeding air flow capabilities of the existing motors. Replacement Statement of Work USDA, Agricultural Research Service fans shall include motor and propeller assemblies, metal housing, discharge louvers, PVC coated wire guard on intake side, and wiring/conduit between fan motor and contactor box. The existing opening in block wall for fan assemblies measures approximately 41"W x 41"H x 7.5" D. Motors are single phase, 115V. Evaporative Coolers: All evaporative coolers shall include: • PVC troughs • Manual water control valves • In-line filters • Pumps • 4" double-coated cooling pads Evaporative cooler arrangements shall include reservoirs located inside greenhouse structure or utilize self-contained reservoir systems where internal reservoirs are not possible. Cooler mounts and stringers shall be pressure treated lumber sized consistently with cooler manufacturer recommendations. Existing coolers are approximately 23-24 feet long and are sized for pads measuring 36" tall and 4" thick. Electrical Installation: Wiring, conduit, fasteners, and junction boxes to intake shutter actuator motor circuits shall be rated for wet locations and installed in a manner preventing water intrusion. The conduit, fasteners, and junction boxes for this installation are to be suitable to be in direct contact with water for extended periods. Utilization of Bio-Based Products: The contractor shall utilize products and material based from bio- based materials as applicable, (e.g. bio-based greases; bio-based hydraulic fluids, bio-based absorbents), to the maximum extent possible without jeopardizing the intended end use of detracting from the overall quality delivered to the end user. All supplies and materials shall be of a type and quality that conform to the applicable Federal Specifications and Standards. All supplies and materials to be used in the performance of work described herein are subject to the approval of the Engineering Project Manager (EPM). Products can be found at: www.biopreferred.gov Statement of Work USDA, Agricultural Research Service Safety: The contractor will submit a Site Specific Safety Plan/Accident Prevention Plan in industry recognizable format to the Contracting Officer within 14 days of contract award. Contractor shall furnish a Site-Specific Safety Plan (SSSP) and the Government shall review the SSSP prior to the start any construction activities. Safety and health matters, as they relate to the work, are the exclusive responsibility of the contractor. The contractor shall furnish, erect, and maintain barricades, warning lights, signs, guards, or take other precautions that may be required by law or local authorities for the protection and security of the grounds, facilities and personell.

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Heating, Ventilating, and Air Conditioning (HVAC), Instrumentation and Control for HVAC, HVAC Air Distribution, Central HVAC Equipment.