The U.S. Army Research Laboratory (“ARL”) is a Government laboratory which conducts scientific, technical, and analytical research to provide innovative solutions for the Army. The objective of this task order was to renovate an 800SF laboratory of the Adelphi Laboratory Center, which houses the synthetic bio-lab, classified as a BSL2. The scope of this renovation project included ancillary design for the lab ventilation system for the autoclave and chemical fume hood, installation of laboratory equipment, testing and certification of chemical fume hoods, and the installation of new electrical disconnect switches, plumbing fixtures, and utility changes to support the new renovation in its entirety. Architectural scope of work included selective demolition to alter walls, ceiling, floors, existing wall mounted power strips, existing 60A UPS disconnect switches as needed for the installation of a Government furnished chemical fume hood, a government furnished autoclave, a government furnished eye wash and sink. Matos also altered the walls, ceiling, and floors to accommodate utilities, waste lines, mechanical, electrical, plumbing fixtures, and associated lines necessary for the installation of the new equipment. New work included patching and repairing all walls, ceilings, and floors to match the existing construction. Plumbing scope of work included providing lab air from the existing system to the new lab equipment, domestic cold water and in-house nitrogen to the relocated chemical fume hood, domestic cold water and domestic hot water to the new sinks, insulated water lines, waste line piping from the newly installed sinks, as well as laboratory hood and autoclave to the existing acid waste system, and installation of all necessary utility drops required for the new installed lab equipment. Mechanical scope of work included installation of a canopy hood over the autoclave door. The exhaust airflow through the autoclave door canopy hood produced up to 1,400 cubic feet per minute (“cfm”). Matos connected the autoclave canopy hood and the fume hood to the existing corrosive main exhaust. The fume hood exhaust was 550 cfm. The ductwork was sized such that the velocity through the ductwork was at least 2,000 feet per minute (7” duct to fume hood, 10” diameter duct to autoclave, 12” diameter main branch to autoclave and fume hood). Matos set the minimum, maximum, and heating airflow of the existing supply terminal units (2 units) to 900 cfm each. The hot water coil of the 2 units was 1.8 gallons per minute (“gpm”). Installed ductwork and met Sheet Metal and Air Conditioning Contractor’s National Association standards, was Seal Class A, and the static pressure class of new ductwork included the following: -12 inches of water gauge (“in wg”) for corrosive exhaust larger than 30-inch diameter; -8 in wg for corrosive exhaust less than 30-inch diameter and larger than 24 inch diameter; and -4 in wg for corrosive exhaust less than 24 inch diameter. Matos removed and disposed of the existing return fan, Variable Frequency Drive (VFD), and return fan discharge wall/diffuser, and installed a new return fan array consisting of six (6) fans with Electronically Commutated Motors (ECM) and a new fan array control panel with terminal blocks and control devices as required to provide proper fan control. The new fan array was able to move 22,950 cfm against a static pressure of 1.5 in wg and is able to throttle the airflow down to less than 2,500 cfm. The multiple fan and motors were spaced in the air way tunnel cross section to provide uniform airflow and velocity profile across the entire airway tunnel section and components contained therein. The fans were direct driven, single inlet, centrifugal fans with backwards-curved high-performance centrifugal impellers with radial diffusers. For AH 2-2 Coils, the outdoor air, hot water coil of AH 2-2 included 31 GPM. Matos replaced the hot water piping and accessories from the butterfly isolation valve at the main, serving the coil to the outdoor air, hot water coil of AH 2-2. Matos replaced the circulating pump serving the outdoor air hot water coil. The new circulating pump was sized for 31 GPM and 12 feet of head with a maximum motor size of 1/3 horsepower. Matos also replaced the existing control valve and actuator of AH 2-2’s outdoor air hot water coil. The outdoor air chilled water coil of AH 2-2 included 100 GPM. Matos replaced the chilled water piping and accessories from the butterfly isolation valve at the main serving of this coil to the outdoor air chilled water coil of AH 2-2. The project included requirements to pressure test the new pipe, and test and balance. The project included extensive requirements for control valves including flow meter and temperature sensors, coil optimization, control valve actuators, and one airflow monitoring station. Electronic Safety and Security scope of work included requirements for the HVAC controls (return fan array, two new control valves at AH 2-2, flow meters, temperature sensors, and the hot water recirculating pump). Controls and control testing was required for New JADE Web-8000 controller, AH 2-2 return airflow monitoring station, AH 2-2 return fan array, control valves and their actuators for the upper heating and cooling coils of AH 2-2, flow meters for the upper heating and cooling coils of AH 2-2, entering temperature sensors and leaving temperature sensors of the upper heating and cooling coils of AH 2-2, the hot water recirculating pump for the upper heating coil of AH 2-2. Electrical scope of work included providing all materials, tools, equipment, labor and services necessary to furnish and install complete working electrical systems as it related to the new installed mechanical equipment. The project included requirements for routing of cable conduits, disconnect switches, overload devices and location of devices and equipment, power to the new and relocated equipment, wiring of the fume hood and autoclave for 120V operation, electrical system for new autoclave, power to all AH 2-2 return fan array, AH 2-2 actuators of upper coils, and recirculating pump for AH 2-2 upper hot water coil, and all new control devices (e.g., flowmeters, AH 2-2 return fan motor control center).
