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 water main replacement falls behind schedule
Lucy Beere withdraws from Commonwealth Games selection
Agreement reached with Fermain Café tenants
Guernsey mum given £11K shock fine over improper disposal of batteries
States order clean-up of derelict Guernsey Hotel
Channel Islanders urged not to panic buy fuel
Guernsey Post announces tracked service along with letter price increases
New course to empower women to cycle confidently on Guernsey’s roads