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

  1. Planning Planning
  2. Erosion control
  3. Sediment control

Adhere to guidance

Monitoring and inspection

  • Suspended solids (turbidity)
Municipal Stormwater Permits
Industrial Stormwater Permits
Construction Stormwater Permits
Stormwater Aquip Seaview
Metal Products - Aquip Emerald
Metal Products - Purus AEP
Metal Products - Purus Davis Industries