Similarly, the male sand goby is relentless about guarding his eggs from predators, but even if he has plenty of extra food available, he will still eat about a third of his brood. Research into how he decides which eggs to keep and which to eat reveals that size matters: male gobies tend to eat the largest eggs.
The CSB report found that the permit-required confined space rule set by OSHA does not prohibit entry or work in confined spaces where the concentration of flammable vapor exceeds ten percent of the chemical's lower explosive limit, or LEL.
For example, confinement, limited access and restricted airflow can result in hazardous conditions that would not normally arise in an open workplace. The terms permit-required confined space and permit space refer to spaces that meet OSHA's definition of a confined space and contain health or safety hazards. For this reason, OSHA requires workers to have a permit to enter these spaces.