2009 fire/collapse of MWH1 released approximately 4.7 M L oil into the Timor Sea.
Oil gushed for 74 days before capping. Sediment studies initially declined.
Estimated 183,000 L dispersant forced oil into seawater in ∼100 m water depth area.
Sediments collected from nearby reefs and shoals 6 and 18 months later.
Assessment based on the increased oil inputs to the system.