Chemical Testing Equipment The Chemical Test Division (CTD) protects the U.S. and its allies from chemical threats through expert planning, management, and execution of developmental and operational testing. Testing includes individual and collective protection equipment, contamination avoidance systems, and decontamination systems and processes. Customer projects are evaluated by division scientists. Project teams are assembled from each branch and draw on a high level of expertise in project design, methodology development, and testing with chemical agents, simulants, and toxic industrial chemicals/toxic industrial materials (TIC/TIM).