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Examples of BMPs with underground reservoirs include [[Underdrains]], [[infiltration trenches]], [[permeable paving]], [[infiltration chambers]], [[exfiltration trenches]].  
Examples of BMPs with underground reservoirs include [[Underdrains]], [[infiltration trenches]], [[permeable paving]], [[infiltration chambers]], [[exfiltration trenches]].  


Particular care should be made to avoid any use of granular B type II or Select Subgrade Material (SSM). Both of these materials are permitted to have a higher proportion of fines in the distribution.  
Granular B type II and Select Subgrade Material (SSM) must be avoided in all LID structures. Both of these materials are permitted to have a higher proportion of undesirable fines in the distribution.  


===Justification===
===Justification===

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