Current estimates of the oil flow before the well was capped show that 53,000 barrels of oil per day were leaking from the well. In total, about 4.9 million barrels of oil have been released from the well, although containment efforts captured approximately 800,000 barrels prior to the capping. USGS Director Marcia McNutt asserted "The new containment cap and the well integrity testing procedures have provided new data and new opportunities to firm up some of the unknowns."