There is a septic tank in front of the shop. How to solve it?

If the septic tank is as high as the ground, it can be covered with a board, which is impermeable and nonvolatile, and some flowers and plants can be put on it appropriately to weaken its potential. If it is higher than the ground, hang a gourd in the right place of the shop and add five emperors' money to solve the problem, and put tall green plants in the right place to stop the spread of dirty air.