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|'''[[Stormwater Tree Trenches|Stormwater tree trenches]]'''
|'''[[Stormwater Tree Trenches|Stormwater tree trenches]]'''
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|5:1 to 15:1||[[Underdrain]] recommended<br>if < 15 mm/hr||1 to 2||5 to 10||0 to 2||No<sup>ix</sup>||4m- Building Foundation<br>Underground Utilities, <br>Drinking Water Wellhead<br>Protection Areas||No||2 year - WHPA-B
|5:1 to 15:1||[[Underdrain]] recommended<br>if < 15 mm/hr||1 to 2||5 to 10||0 to 2||No<sup>ix</sup>||4m- Building Foundation<br>Underground Utilities, <br>Drinking Water Wellhead<br>Protection Areas||No (infiltrating); Yes (non-infiltrating)||2 year - WHPA-B
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