LeedQuantity

USGBC LEED for NEW CONSTRUCTION: SS Credit 6.1

Intent

  • Limit the disruption of natural hydrology

  • Increase on-site filtration

  • Manage storm water runoff

  • Eliminate sources of contaminants

  • Reduce impervious cover

  • Reduce/eliminate pollution

  • Remove pollutants from storm water runoff

Stormwater Design (for reduction of impervious surface)

  • alternative surfaces: rain gardens, vegetated swales, rainwater recycling

  • non-structural surfaces: vegetated roofs, pervious pavement, grid pavers

Implementation

1. case 1: impervious surface less than or equal to 50% of total site area

  • post-development peak discharge rate and quantity equal to or less than pre-development (for 1 and 2 year, 24-hour design storms)

  • implement a stormwater management plan that protect receiving stream channels from excessive erosion by implementing a stream channel protection strategy and quantity control strategies.

2.  case 2: impervious surface more than 50% of total site area

  • post-development peak discharge rate and quantity 25% less than pre-development (from the two-year 24-hour design storm)

 

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