Typical recommendations for BMP removal for common construction stormwater BMPs Typical recommendations for BMP removal for common construction stormwater BMPs

Typical recommendations for BMP removal for common construction stormwater BMPs.
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BMP category/type	Standard procedure	Applicability and special considerations
Erosion prevention practices (stabilization practices)
Temporary/permanent seeding	Left in place	Mulch or other natural temporary cover to protect seeded areas should also be left in place.
Mulches	Left in place	Mulch, hydraulic mulch, and any anchoring materials must be degradable.
Tackifiers/soil stabilizers	Left in place	If using tackifiers and stabilizers (e.g., polyacrylamide or PAM), ensure they are nontoxic to aquatic life (i.e., not cationic).
Erosion control blankets (ECBs)	Left in place	Installed ECBs with emergent vegetation are left in place. May be removed and reused when used as temporary cover without seed on short-duration projects.
Turf reinforcement mats (TRMs)	Left in place	Left in place to provide permanent armoring and vegetation support.
Erosion prevention practices (other)
Riprap	Left in place	Typically serves a permanent function for armoring, stabilizing, and protecting soil against erosion.
Sediment control practices
Vehicle tracking BMPs	Removed	Removed after final site stabilization or after no longer needed (e.g., vehicles no longer entering or existing site).
Perimeter controls	Varies; most are removed	May be left in place if constructed from degradable materials (e.g., fiber rolls/logs). Silt fencing must be removed after upslope areas are stabilized. BMPs with degradable fill (e.g., sediment control logs filled with compost) may have outer casing removed and contents left in place.
Check dams	Varies	May be left in place if constructed from degradable materials (e.g., fiber rolls/logs). Check post-construction stormwater management plan for applicability. Rock check dams can be spread along ditch bottom after channel is vegetated. Non-degradable manufactured products must be removed after stabilization.
Diversion barrier controls	Varies; most are removed	In general, all are removed after stabilization. In special cases, such as where removal may damage structures or foundation soils, cofferdams may be left in place.
Inlet protection	Removed	Must be removed after stabilization.
Outlet energy dissipation	Varies	Devices designed for temporary, short-term (e.g., less than one year) use must be removed after stabilization. Whether they are left in place as permanent BMPs depends on function and desired aesthetics. Check post-construction stormwater management plan for applicability.
Sediment traps/basins	Varies	Temporary sediment traps are removed after stabilization. Temporary sediment basins may be converted to permanent stormwater management basins after stabilization.
Stabilized earth/soil berm	Varies	Typically removed after stabilization. In some cases, may be left in place if permanently stabilized with vegetation. Check post-construction stormwater management plan for applicability.
Surface water protection practices
Buffer zones	Left in place	Always preserved on site
Construction stormwater treatment practices
Dewatering (including chemical treatment and sediment filtration)	Removed	Dewatering practices are operated during construction activity and may be removed after construction ceases and site is stabilized.
Practices to minimize sediment discharge
Diversion and working in the dry	Removed	Removed after construction is complete and stream channel and site are stabilized.
Temporary stream crossing	Removed	Removed after construction is complete and stream channel and site are stabilized.
Stabilized construction exit	Removed	Removed after construction is complete and construction equipment/materials have been removed. Grade and stabilize area after removal.