Wilma Subra, a chemist and technical advisor at LEAN, published a report regarding the odors causing complaints in the Bayou Corne/Grand Bayou community. On August 3, 2012, a sink hold developed adjacent to a mining cavern and salt dome after the salt cavern was breached and failed. The top of the cavern contains crude oil and natural gas, whose potential source is from one or more of three oil and gas production zones adjacent to the edge of the salt dome at a depth of 3,000 to 6,000 feet. Not long after this development, the surrounding community began complaining of odors and various symptoms from the odors.