On average 10 Oil pollution incidents are reported to the UK environment agencies each day. OFTEC have produced a useful guide to help you check and maintain your tank, fittings and pipework.
It is your responsibility to make sure your oil tank is safe and does not leak. You should have your tank check professionally as part of your annual boiler service. As standard our engineers will inspect your oil storage tank and sight gauge, check for water if a suitable valve is fitted, and report any defects.