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NC-2009 SSc6.1:Stormwater Design—Quantity Control

Concerning Underground Basements

Omar Elrawy

Green Building Consultant | Researcher

GreenA Consultants

LEEDuser Basic Member

38 thumbs up

Project location :

September 17, 2015

Dear all, My project is two underground basement parking floors, that are built on the total land area, while the above-grade floors are built on 30% of the total land area. Should I consider this project as case -1 (non-zero lot line); accounting for the run-off that may occur on the area outside the above-grade building, or case-2 (zero lot line); as I did practically build 100% of the project area for basements. Thanks

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Michael DeVuono

Regional Stormwater Leader

Arcadis North America

LEEDuser Expert

144 thumbs up

Wed, 11/11/2015 - 20:56

Case 1 and Case 2 apply to existing impervious, not proposed.

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