While there's certainly some cleanup for the crew to do (the article says it's already 20% done) this is still a relatively small spill and probably pales in comparison to the contamination already created by gas stations in the region.
Please correct me if I misread, but I thought the article said 20% of the oil was recovered, not that cleanup and restoration was 20% complete. Full restoration is rarely possible, and cleanup can take decades as there is a very long tail of activities.
About 1,6 km by 1,6 km. So 16 100 m run tracks or football pitches long sides. Albeit those can be 90 to 120 m for UK or 100 to 110 m for international...
