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Release Date: 16 June 2010 ADDITIONAL OIL AND GAS CONTAINMENT SYSTEM BEGINS OPERATION BP announced today that oil and gas is flowing through a second containment system attached to the Deepwater Horizon rig's failed blow out preventer (BOP). This second system supplements the lower marine riser package (LMRP) cap containment system, which remains in operation. The new system is connected directly to the BOP and carries oil and gas through a manifold and hoses to the Q4000 vessel on the surface. The Q4000 uses a specialised clean-burning system to flare oil and gas captured by this second system. Oil and gas collected from the BOP reached the Q4000 at approximately 1:00 am CDT on June 16. Operations continue to stabilise and optimise the performance of the second containment system. Information on the volume of oil collected and gas flared by the LMRP cap containment system is being updated twice daily on BP's website, www.bp.com. When measurements are available for volumes of oil and gas being flared by the Q4000, this information will be added to the updates on BP's website. Neither the new capture system nor the LMRP containment cap system has ever before been deployed at these depths and conditions, and their efficiency and ability to contain the oil and gas cannot be assured. --- BP Press Office London: +44 20 7496 4076 BP Press office, US: +1 281 366 0265 www.bp.com/gulfofmexicoresponse (END) Dow Jones Newswires June 16, 2010 09:56 ET (13:56 GMT)