The Department of Defense, specifically the Department of the Army through the W071 Endist Seattle office, is soliciting proposals for Analytical and Data Validation Services under a Total Small Business Set-Aside. The procurement aims to secure professional scientific and technical services for chemical analysis and validation across various matrices, including soil, water, and air, in compliance with federal and state environmental regulations. These services are critical for ensuring environmental safety and compliance with laws such as the Clean Water Act and the Resource Conservation and Recovery Act. Interested firms must demonstrate capabilities in bioassay, chemical analysis, and data validation, and are required to obtain necessary accreditations. For further details, including the revised price schedule, interested parties should contact John Scola at John.P.Scola@usace.army.mil or Cassandra Gonzalez at cassandra.p.gonzalez@usace.army.mil.