ending his shift on the rig april 16th. four days later, eleven workers died. >> as for the well itself, how many total leaks are we aware of or they're admitting to. >> exactly. we know of four. these are oil as well as methane gas bubbles. one two or three miles away from the well ruled out as being connected. a bubble seep is 2 or 300 feet away. another one is under the blowout preventer. there's a leak coming from underneath the cap which apparently is not 100% tight fitting. since the pressure continues to rise slowly but continues to raise, bp as well as the science team advising admiral allen believe it's not posing a risk and will keep the cap on. >> phil keating, thank you very much, we'll see you later.