dome. this dome will eventually be lowered into the water. it's designed to siphon the oil to a tanker on the surface. trace galler is in louisiana for us. how close are we to this oil coming ashore? >> reporter: yeah. it's a matter of opinion, jane. a lot of people saying it's about 9 miles away. the coast guard says it is 5-7 miles away, so that's the estimate we're going with right now. estimated landfall anywhere from 3-5 days kind of depending on weather. we just had a crew come back, and i want to show you this because this is a sample of the oily water. notice, if you will, the color. it's kind of a rust color or an orange if you can see this thing properly. we've got a couple different opinions on this. i want to show you the video of the spill itself, and you can see how much orange it looks on the surface. opinions range from that being light refraction, that's why it's that color. we talked to a chemist who says that's because of the disper sants that have been used, they are eating away the oil,