BP , rig owner Transocean and well cement contractor Halliburton have blamed each other for the disaster . Deep - water oxygen levels are down but not deadly , report concludes . The study tracked ocean oxygen levels from May to September . Latest federal report does n't mention the study 's ` ` broad ecoystem consequences '' BP 's report on the disaster is scheduled for release Wednesday .
Deep - water oxygen levels are down but not deadly , report concludes . The study tracked ocean oxygen levels from May to September . Latest federal report does n't mention the study 's ` ` broad ecoystem consequences '' BP 's report on the disaster is scheduled for release Wednesday .