Understanding the Storm Water Pollution Prevention Plan (SWPPP)

1. Understanding the Storm Water Pollution Prevention Plan (SWPPP) Construction Site Management Erosion and Storm Water Management Certification Program 2013/2014 Dwayne Stenlund, MSc, CPESC Minnesota Department of Transportation Office of Environmental Stewardship

2. Storm Water Discharge Permit

3. Common Pollutants • Water based sediments • Wind based sediments • Grouts, cementitious agents • Secret/proprietary agents • Bitumen's • Fertilizers, liming agents • Oils, antifreeze, hydraulic fluids • etc • Chlorides/chlorine • Pesticides, herbicides

4. MSDS Documents

5. Common SWPPP items • Preplanning • Action Planning • Amending • Quality control • Site access/road building • Perimeter defenses • Temporary soil stabilization • Drainage routing/diversions • Pad drainage treatment • Chemical management • Chemical containment • Chemical treatment • Spill management • Dust control • Good housekeeping • Disposal • Final restoration

6. Many items are potential pollutants

7. Implementing the SWPP_Plan • Erosion Prevention Practices • Sediment Control Practices • Dewatering and Basin Draining Practices • Inspection and Maintenance Practices • Pollution Prevention Management Practices • Final Stabilization Practices

8. Common BMP Tools • Basins, traps, dumpsters, barges • Material lock-out • Geotextiles, blankets, mulches • Poly sheeting • Pumps • Topsoil berms, logs and fences • Qualified inspectors/brain • Wheel washoff/ grizzley/ slash mulch • Garbage containers • Secondary containment

9. Materials On Hand • Mulches (weed free) • Wood fiber wattles (biologs • Natural net blankets • Geotextiles • Plastic

10. Material Lock-up/out • Prevent accidental spills • Prevent vandalism

11. Prevention of storm water exposure

12. Material Waste Management

13. Spill Recovery BMPs

14. Spill Prevention BMPs

15. Tethering

16. Dewatering BMPs

17. Gaining Access: Work Area Access Mats

18. Compaction prevention • Prevention of travel • Winter work • Load transfer mats • Subsoiling to de-compact

21. Topsoil salvage & protection

22. Construct traps

24. Floating Head Skimmer discharge

25. Infiltration SWQ systems • Typically built last when upgradient land disturbance is complete

26. Stabilize outfalls

27. Divert water

32. Perimeter Controls • All Season

34. Exposed Soil Stabilization

38. Inspection Protocols • Note: some treatment systems are below ground

39. Brown Water Treatment and Monitoring • Oil film removal • pH adjustment • Slurry flocculation

40. BMP decontamination protocols • It must be inspected, and documented as inspected as clean prior to transport • If plants, mud, soil, debris, etc is observed, it must be powerwashed prior to entry of the rivershed. • Control/filter runoff waters • Must be allowed to dry for 21 days prior to use unless high temperature was used, or other listed MNDNR/USACE Protocol.

42. Monitoring • Daily work area review • Note in diary when last worked in that area • Where the water leaves • General perimeter and exits • Slope stabilization condition • Chemical storage and containment areas • Laydown yards

43. Make it grow

45. Example Plan • TH36 Hilton Trail