The Chemical Safety Board released their preliminary findings on the MCHM leak that forced hundreds of thousands of West Virginians to go without water for several days in January 2014.
The CSB says they found visible failures on the bottom of the tank that leaked into the Elk River. The holes likely formed by corrosion associated with water pooling, according to the release from the CSB.
The CSB said they also found no record of inspections on the tanks prior to January 9.
The pooling of water was most likely due to holes in the tank roofs. The CSB also found that a nearby tank had a hole similar to the tank that leaked. The live stream is currently on the full website if you are reading this story on a mobile phone.