A-Z Index [O] A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Occupational health Chemical Hazard Alert Notices (CHANs) Offices Office health and safety microsite Free leaflets and information sheets about officework Office for Nuclear Regulation Office for Nuclear Regulation microsite Offshore oil and gas Offshore microsite Free leaflets and information sheets relating to the offshore industry Hydrocarbon releases database Offshore oil and gas research. Forms for offshore industry The Energy Review Offshore Major Accident Regulator (OMAR)