Islanders have been asked to avoid Beaucette Marina after asbestos was discovered, following Tuesday evening's fire.
The fire engulfed a shed, but nobody was injured.
Health and Safety inspectors analysed the site, discovering asbestos debris. However, they say the risk to the public is low.
A specialist contractor is dealing with the contamination on behalf of the site owner. Do not attempt to do this yourself as you may become contaminated and could be exposed to asbestos fibres.
If you find any debris, do not touch it. Instead, call Ricky Stevens on 245000 who will arrange for it to be collected safely.

Guernsey Airport to stay open later as part of Aurigny's profitability plans
States to vote on independence for The Ladies' College
Guernsey Budget 2027: £15m growth fund and fuel duty hikes
Donations in memory of Hannah Benfield to Alderney rescue groups
Deputies asked to approve £6m Guernsey Airport roof repairs
Majority of Guernsey stamps bought by collectors
Alex Scott withdraws from England squad
GST backlash prompts call for calm from Guernsey deputy