The prevention and control of emissions of volatile organic compounds (VOCs) from storage tanks containing oil or chemical feedstocks or products is addressed by this new EEMUA Publication. Emission reduction has become of primary importance, not only for economic reasons but increasingly to minimize the impact on the environment. EEMUA 213 begins by introducing the main theory on how emissions can be minimised by focusing on the source of emissions. It then guides tank owners and operators, manufacturers, designers and specifiers to the most suitable tank type for particular feedstocks based on the true vapour pressure (TVP) of products. Background theories on possible solutions to prevent or reduce emissions are provided. Guidelines are also given on the treatment of the escaping vapours when the achieved level of emissions does not match the intended level or statutory requirements.