170519-N-HN707-164 PORTSMOUTH, Va. (May 19, 2017) Students record their calculations of a calibration lab activity using an inverted burette during the Industrial Hygiene Exposure Monitoring Course in Portsmouth, Va. The course is hosted by Navy and Marine Corps Public Health Center (NMCPHC) and serves as an introduction to the concepts, theory and terminology associated with industrial hygiene. NMCPHC is the Navy’s go-to resource for subject matter expertise in the fields of industrial hygiene, occupational and environmental health, preventive medicine, health promotion and wellness, epidemiology, health analysis and risk communication. (U.S. Navy photo by Genevieve Williams/Released)