Chapter 11 — Non-GI Stormwater Systems

Non-GI practices include conventional detention systems, manufactured treatment devices, and proprietary systems approved under N.J.A.C. 7:8.

BMP	Description
Blue Roof	Rooftop detention via controlled-flow drain insert
Dry Detention Basin	Quantity-only basin; separate WQ BMP required
Extended Detention Basin	Non-GI detention over liner or low-permeability soils
Hydrodynamic Separator	Swirl-based separator for gross solids and oil removal
MF/UF Membrane System	Membrane filtration for high-level water quality treatment
Manufactured Treatment Device	Proprietary device with NJDEP approval
Oil/Grit Separator	Gravity-based separator for oil, grease, and grit
Underground Detention	Subsurface storage for peak flow attenuation