New publication pegs total DWH oil spill at 4.9-5.5 million bbls– Griffiths, S. 2012. Oil Release from Macondo Well MC252 Following the Deepwater Horizon Accident. Environ. Sci. Technol. DOI: 10.1021/es204569t (on-line at http://pubs.acs.org/doi/abs/10.1021/es204569t)
