Hi can anyone help with suggestions on oil tank information , i was asked to have a look at a oil boiler, but on arrival i noticed oil tank had been bricked up and now there is no access to the tank and no way of checking for leaks , the boiler has been serviced for many years by a oil engineer , but they never said the tank is located in a wrong position or dangerous or needed inspecting , The oil tank has been in for many years and is probably a single skin steel tank . Do i need to inform the property that they need to install a new bunded tank or leave as it is ,