Background : The Animal Husbandry Support Contract for NIEHS provides care, maintenance, and technical services for laboratory animals, seven days per week, including weekends and holidays, for 72,000+ square feet of laboratory animal facility space, which includes outside ancillary support areas, including a separate facility located approximately one mile from the main facility. Animal care personnel are required to wear a washable, cotton/polyester two-piece uniform of scrub pants and a long sleeve, snap-front shirt (a one-piece cotton coverall may be substituted), safety shoes, disposable shoe cover, head cover, surgical mask), and gloves when working in the animal rooms.