Mercury (element) polluted water. They arise by a process known as biomethylation. Mercury is used primarily for the manufacture of industrial chemicals or for electrical and electronic applications. It is used in some thermometers, especially ones which are used to measure high temperatures. A still increasing amount is used as gaseous mercury in fluorescent lamps, while most of the other applications are slowly phased out due to health and safety regulations and is in some applications replaced with less toxic but considerably more expensive Galinstan alloy. Mercury and its compounds have been used in medicine, although they are much less common today
Explosives safety of Former Used Defense Sites (FUDS) and Former Toxic Chemical Agent Sites where munitions from all branches of service disposed of A&E by burial or dumping up until the end of the Vietnam War. The USATCES acts as the Army’s safety watchdog for disposal of chemical ammunition at the Army’s Chemical Disposal Facilities. As part of Army's Ordinance Corps under TRADOC Specially trained Civilian Explosives Safety Personnel [Quality Assurance Specialist (Ammunition Surveillance) (QASAS)] and Safety Specialist that have received specialized training in A&E Safety) from the USATCES are deployed worldwide, wherever the U.S. Army has A&E. Their mission is to