GuLF Study Environmental Health Sciences (NIEHS), part of the National Institutes of Health, and aims to recruit 55,000 of the 150,000 workers who volunteered or were employed to help clean up the spill. It is led by Dale Sandler, head of the NIEHS's epidemiology branch. The "Deepwater Horizon" oil spill was the world's largest accidental marine oil spill. It began on 20 April 2010 after an explosion on the "Deepwater Horizon", a drilling rig leased by BP to drill an exploratory well. Between then and 15 July, when the well was capped, over four million barrels of oil (around 170 million US
Guimaras oil spill she declared a "national calamity". On August 17, British oil experts, sent by SMDC's foreign insurer, arrived in Guimaras to assess the situation. SMDC stated that the experts will check the extent of the oil pollution. The Britons conducted an aerial survey over Guimaras Island and made recommendations based on their findings. A four-man team from the U.S. Coast Guard arrived on August 23 to assist in determining the exact location of the tanker. Guimaras oil spill The Guimaras oil spill occurred in the Panay Gulf on August 11, 2006 when the oil tanker M/T "Solar 1" sank off the