Changes

An impermeable liner is incorporated into non-infiltrating practices such as [[stormwater planters]], or has also been applied in [[permeable pavements]] installations where separation from the native soils and groundwater was required.  

An impermeable liner is incorporated into non-infiltrating practices such as [[stormwater planters]], and may be applied in [[permeable pavements]] installations where separation from the native soils and groundwater is required.  

*Waterproof containment can be created using concrete or a plastic membrane/liner (HDPE or EPDM are common materials).

*Waterproof containment can be created using concrete or a plastic membrane/liner (HDPE or EPDM are common materials).

**When the membrane is being used directly in the ground, punctures from stones can be prevented by compacting a layer sand (30  - 50 mm) over the soil prior to installing the membrane.  

**When the membrane is being used directly in the ground, punctures from stones can be prevented by compacting a layer sand (30  - 50 mm) over the soil prior to installing the membrane.