This is a Notice of Intent for a sole-source award to Rees Scientific Corporation for a one-year service agreement on their proprietary environmental monitoring system at NIH facilities in Bethesda, MD. The required services include preventive maintenance, calibration, and validation of the system to support manufacturing operations. The anticipated period of performance is from May 15, 2026, through May 14, 2027, and the requirement is anticipated to be below the Simplified Acquisition Threshold of $250,000. The government believes only Rees Scientific possesses the necessary proprietary access and qualifications to perform the work. Interested organizations may submit a capability statement to demonstrate their ability to perform the required services.