The slab of weathered crude and water was more than 100 feet long . Most of its 40,000-plus pounds was oil and water , a Coast Guard official says . California is the last state where the Horizon cleanup occurred .
The slab of weathered crude and sand was more than 160 feet long . Most of its 40,000-plus pounds was sand and water , a Coast Guard official says . Louisiana is the last state where Deepwater Horizon cleanup continues .