Authorities have spent the weekend working to contain an oil spill in waters off Kwinana.
The Department of Transport and Major Infrastructure (DTMI) has confirmed about 150 litres of heavy crude oil was released into waters near the Kwinana Fuel Terminal on Saturday, March 21.
"DTMI is working with Fremantle Ports in coordinating an appropriate response, and has appointed an Incident Controller," a DTMI spokesperson said.
"The area near the release has been boomed, and this has contained the majority of the oil.
"Some oil has been observed outside of the booms. As a precaution, the beach immediately surrounding the area was closed by the City of Kwinana at the request of DTMI to help ensure community safety.
"DTMI and Fremantle Ports personnel conducted a shoreline clean-up on the public beach yesterday, which was successful, and have returned today to clean up residual oil which has washed up overnight."

Dave Reid posted a photo on social media of the oil clinging to his dog's leg. PIC: Dave Reid/Facebook
Wells Park Beach remains closed and will be reassessed before it is re-opened.
The terminal operator is also being supported by the Australian Marine Oil Spill Centre who will assist with any wildlife that may be impacted by the oil.

Locals urged to look out for man who removed electronic monitoring device
Four charged over brutal Warnbro home invasion allegedly linked to illicit tobacco trade
WATCH: Whale beached at Long Point
City of Rockingham records steep increase in animal cruelty complaints related to untreated medical conditions
Accused dirt bike hoons charged by Mandurah Police
Heavy rainfall, thunderstorms to lash Mandurah down to Busselton
Drivers escape serious injury after West Pinjarra, Baldivis crashes
Police investigate stabbing of two men at Warnbro home
Shark sighted in Dawesville Channel
