They almost killed three people by violating general industry practices... 

http://www.adn.com/energy/article/state-agency-hilcorp-responsible-near-deaths-three-oilfield-workers/2015/12/24/

They also got fined for violating the rules.

http://www.adn.com/energy/article/agency-fines-hilcorp-alaska-says-company-disregards-alaska-oilfield-regulations/2016/05/06/

Strange how in just one short year of operating they have twice been afoul of the rules to the point of being fined yet you claim they are "very safe".