In October 2012, BP reported that they had found and plugged leaking oil from the failed containment dome, now abandoned about 1,500 ft (460 m) from the main well.[106][107][108] In December 2012, the USCG conducted a subsea survey; no oil coming from the wells or the wreckage was found and its source remains unknown.[59][109] In addition, a white, milky substance was observed seeping from the wreckage. According to BP and the USCG, it is "not oil and it's not harmful."[110]