Changes

*Tight urban spaces where no landscaped practices can be squeezed in, and there is a low risk tolerance for flooding.}}

*Tight urban spaces where no landscaped practices can be squeezed in, and there is a low risk tolerance for flooding.}}

'''The fundamental components of an exfiltration system are:'''

'''The fundamental components of an exfiltration system are:'''

*pre-treatment devices to retain coarse sediment, trash, debris and floatables,

*[[pre-treatment| pre-treatment devices]] to retain coarse sediment, trash, debris and floatables,

*perforated [[pipes]] connected to maintenance holes and catch basins,

*perforated [[pipes]] connected to maintenance holes and catch basins,

*a gently sloping granular [[reservoir aggregate| storage reservoir]] below the perforated pipe.  

*a gently sloping granular [[reservoir aggregate| storage reservoir]] below the perforated pipe.