Problem: Drilling in London and high pressure Nitrogen gas pockets are hit killing two workers due to lack of ventilation. Background and proposed theory: Underneath London in the 1940s the water table was lowered underneath an impermeable layer of clay. This created a vacuum in certain areas Due to the vacuum the water cavitated Air came out of the water and formed above the water and below the clay. Iron present in the clay oxidised causing the removal of Oxygen in this air and resulted in Nitrogen rich air Water table increased (due to less demand officially) and resulted in the Nitrogen under high pressure. Question: Does this theory make sense to scientists? Thanks for your help regardless I really appreciate it Mahony A question I have is? What happens if an area under negative pressure undergoes cavitation? Does the pressure change with the release of this air into the vacuum?
