Prognosis on Storm Water Infiltration | Moving from Disposal to Reclamation
6th Annual Washington Hydrogeology Symposium, Tacoma, WA
Municipal Stormwater Permits
A municipal separate storm sewer system municipal separate storm sewer system (MS4) is a (MS4) is a conveyance or system of conveyances owned by a public conveyance or system of conveyances owned by a public entity that discharges to U.S. waters entity that discharges to U.S. waters.
Stormwater Management Plan (SMP):
- Identify major outfalls Identify major outfalls
- Eliminate non Eliminate non -storm water discharges storm water discharges
- Reduce pollutants Reduce pollutants z Control pollutants Control pollutants
- Public involvement Public involvement
Analytical and visual monitoring
- Suspended solids, trash, nutrients Suspended solids, trash, nutrients
Periodic program assessment reports Periodic program assessment reports
Industrial Stormwater Permits
Eleven categories of activity:
- Heavy industry
- Mining & Landfills
- Recycling, etc.
“Fenceline” operating permit
Develop a storm water pollution prevention plan (SWPPP)
Best Management Practices (BMPs )
Benchmark water quality goals
Monitoring & reporting
- Suspended solids, metals (Zn, Suspended solids, metals (Zn, Pb, Cu), oil , Cu), oil
Construction Stormwater Permits
Land disturbance > 1 acre
- Clearing Clearing
- Grading Grading
- Excavation Excavation
Public Notice – Intent, Termination
Erosion & Sediment Control Plan
- Planning Planning
- Erosion control
- Sediment control
Adhere to guidance
Monitoring and inspection
- Suspended solids (turbidity)
