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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