Presentation to Hazel Run, MN community members about their wastewater treatment options. November 2008. Small Community Wastewater Education Program (SCWEP) and Onsite Sewage Treatment Program (OSTP) staff have assisted numerous communities hire professionals to prepare a Community Assessment Reports and Preliminary Engineering Reports; however SCWEP and OSTP have never prepared a CAR or PER. In order to better teach communities and soil-based treatment system professionals about the CAR process and report writing process, program staff undertook the research required to complete a CAR and PER, write the documents, and disseminate the project results to community members and leaders.

1. Operation and Maintenance of Septic Systems: Protect Your Investment

2. Please turn off or silence your cell phone Thanks!

3. Operation and Maintenance of Septic Systems: Protect Your Investment Doug Malchow Extension Educator On-Site Sewage Treatment Program 507-280-5575 [email_address] http://septic.umn.edu (no www in front) Click on “Homeowner Information”

6. Septic System Owner’s Guide

9. WHAT IS SEWAGE? Used water

13. System type depends on the soil redoximorphic features

15. System Components Source Tank Drainfield Treatment in Soil Saturated Zone or Confining Layer Well 3 feet

16. Mound Drainfield Saturated Zone or Confining Layer Distribution Pipes Rock Topsoil Sand 2 feet

17. Mound System Slightly more “advanced”: electricity required Source Septic Tank Soil Pump Tank

18. Ground Surface Water table 36 in 36 in 36 in Trench At-grade Mound

20. Leaky Tanks

21. A Failing System: An imminent health threat

22. Surfacing Systems

23. Inadequate Vertical Separation Source Tank Drainfield Treatment in Soil Saturated Zone Well 1 foot

24. System Components Source Tank Drainfield Treatment in Soil Saturated Zone Well 3 feet

25. WHAT IS SEWAGE? Used water

27. Pathogens - captured by the soil Soil is Sticky Electrical charges

28. Aerobic Soil bacteria snacks! Held long enough to starve!

29. Treatment Performance of Soil: Fecal Coliform Removal Source: Onsite Sewage Treatment Program Manual 0 0 - 100 1,000 to 1 million 1 million to 100 million Fecal Coliform (colonies/100ml; less than ½ cup) Three Feet of Soil Treatment One Foot of Soil Treatment Septic Tank Effluent Raw Sewage Component of Sewage

31. Where are nutrients treated? Tank? Soil? What happens to them?

33. Where are solids treated? Organics and Inorganics Tank? Soil? What happens to them?

41. Septic Tank Pumping

48. Black or Gray the problems are the Same

49. All wastewater must be treated

58. Continual traffic is a problem

68. Questions? http://septic. umn.edu (no www in front)