The Department of Veterans Affairs intends to award a sole-source, firm-fixed-price contract to Rees Scientific for annual validation of an environmental monitoring system. The period of performance is a base year plus four one-year options. Capability information from other potential sources must be submitted by 10:00 AM EST on April 30, 2026, to demonstrate the ability to perform the work. All inquiries and submissions must be sent via email to the specified Contract Specialist. This notice is not a request for competitive proposals.