Slide 18 of 39
Notes:
This infiltration trench has good pretreatment in the form of a vegetated swale. The actually infiltration chamber is below the pea gravel on the surface. A high permeability filter fabric is below the pea gravel. This technique acts as pretreatment for the main infiltration chamber and as a sacrificial failure zone. If the pea gravel clogs, it can be replaced without digging up the entire practice.