Asbestos has been found at the top of a 200ft chimney which is being prepared for demolition.
Steeplejacks discovered the potentially-deadly substance as they started work on one of two chimneys at the disused Broomgrove Power Station site in Hastings.
Health and Safety Executive officials were visiting the site today to decide how to safely remove it.
The chimneys formed part of the power station, which was ravaged by fire in May last year when arsonists set light to 30,000 dumped tyres close to the highly-populated Broomgrove Estate.
It triggered an asbestos fall-out which led to a £100,000 clean-up operation and prompted widespread calls from residents for the stacks to be brought down.
Following the incident, Hastings Borough Council bought the power station site before announcing plans to demolish it and transform the area with businesses, homes and community buildings.
A council spokesman said today the asbestos discovery posed no risk to people living close-by, adding: "The site has been made safe and there is no risk to residents or workers."
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