RTÉ Investigates reveals serious environmental and safety hazards within the ESB Network spanning two decades and hears from a whistleblower who has documented his concerns in protected disclosures Whistleblower Séamus OLoughlin I got the report on the fluid filled cables I got the total leakage up to a million litres in 20 year period I just couldnt compute it to be honest I was astounded An internal ESB report from 2014 which is marked confidential states that leaks could present a very high environmental impact given the proximity to the Grand Canal The ESB report goes on to say that the underground cable oil is not considered compatible with watercourses and the associated eco systems in rivers and canals and the sea