Hazel Run: Upgrading Your Wastewater Treatment: You Have Choices


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A presentation delivered to leaders of a western Minnesota community to offer information about community-level wastewater treatment options.

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Hazel Run: Upgrading Your Wastewater Treatment: You Have Choices

  1. 1. Note to Reviewers: I conducted the first portion of this presentation to help community members understand that Hazel Run has a number of options for wastewater treatment, the difference between their current non-compliant systems and compliant septic systems, and the need for systems management. Dan Wheeler from the Onsite Sewage Treatment Program was the presenter for the second portion of this slide set.
  2. 2. Upgrading your wastewater treatment: You have choices
  3. 3. Please turn off or silence your cell phone Thanks!
  4. 4. Upgrading Your Wastewater Treatment: You Have Choices Doug Malchow, Extension Educator On-Site Sewage Treatment Program 507-280-5575 [email_address] http://septic.umn.edu (no www in front) Click on “Information for Communities”
  5. 5. <ul><li>Professional Training – Designers, Inspectors, Pumpers, Installers </li></ul><ul><li>Research and Demonstration </li></ul><ul><li>Homeowner Operation & Maintenance </li></ul><ul><li>Small Community Wastewater Solutions </li></ul>
  6. 6. Decentralized Systems: Onsite collection and onsite or nearby treatment <ul><li>Individual or multi-household (cluster) </li></ul><ul><li>Standard - trenches, mounds, at-grades </li></ul><ul><li>Alternative Systems- </li></ul><ul><ul><li>pre-treatment </li></ul></ul><ul><ul><li>final treatment/dispersal </li></ul></ul><ul><ul><li>separation </li></ul></ul><ul><li>Water supply options </li></ul>
  7. 7. Anatomy of a Septic System <ul><li>Plumbing : wastewater collection </li></ul><ul><li>Septic tank : primary </li></ul><ul><li>treatment </li></ul><ul><li>Soil treatment </li></ul><ul><li>system : </li></ul><ul><li>final treatment </li></ul><ul><li>and dispersal </li></ul>
  8. 8. A Compliant System Requires a Water Tight Tank
  9. 9. System Components: the Drainfield Source Tank Drainfield (In Ground) Treatment in Soil Saturated Zone or Confining Layer Well 3 feet
  10. 10. Mound System Drainfield Saturated Zone or Confining Layer Drain lines Rock Topsoil Sand 2 feet 3 feet
  11. 11. A mound is a slightly more advanced type of “standard” system Source Septic Tank Mound Drainfield Soil Pump Tank with pump (requires electricity)
  12. 12. Cluster Septic Systems <ul><li>Some components of septic or individual sewage treatment systems (ISTS) are shared amongst neighbors </li></ul><ul><li>Shared components can vary </li></ul><ul><li>Systems basically operate in the same manner as ISTS </li></ul><ul><li>There are however some differences to consider </li></ul>
  13. 13. Cluster Treatment System Components Sources Septic Tank Pre-Treatment
  14. 14. A Cluster Drainfield
  15. 15. Municipal Style System (Collection with centralized treatment) Industry Wastewater Treatment Plant Residences Storm Sewer Sanitary Sewer
  16. 16. Stabilization Pond Natural purification process under controlled conditions, typically a spring/fall discharge to surface waters. <ul><li>Often used for small communites </li></ul><ul><li>Surface discharge to water body </li></ul><ul><li>Requires MPCA permit </li></ul>
  17. 17. Trickling Filter
  18. 18. Any Wastewater Treatment System Requires Management <ul><li>The city will be required to provide management services </li></ul><ul><li>Soil-based septic systems require more active management on the part of the homeowner </li></ul><ul><li>Ongoing education is the key for proper care of septic systems </li></ul><ul><li>Septic system care can be achieved by following some easily understood management tips </li></ul>
  19. 19. Home Management tips: small changes equals big impacts <ul><li>Tank pumping </li></ul><ul><li>Other water using </li></ul><ul><li>devices </li></ul><ul><li>Bathrooms </li></ul><ul><li>Kitchen </li></ul><ul><li>Laundry </li></ul><ul><li>Soil treatment system </li></ul><ul><li>Freezing </li></ul><ul><li>Landscaping </li></ul>
  20. 20. Criteria for selecting a treatment system <ul><li>Treatment – protect health & environment </li></ul><ul><li>Life-cycle costs - installation, operation, maintenance, repairs, monitoring,replacement </li></ul><ul><li>Sustainability </li></ul><ul><li>Appearance </li></ul><ul><li>Reliability </li></ul><ul><li>Degree of management </li></ul><ul><li>Space requirement </li></ul><ul><li>Flexibility </li></ul><ul><li>Community values and culture </li></ul><ul><li>Consistent with land use plan </li></ul>
  21. 21. Questions???
  22. 22. The following portion of the presentation was given by Dan Wheeler, registered soil scientist with the University of Minnesota Onsite Sewage Treatment Program. Dan was the lead field staff for the site evaluation process and could best answer questions related to each parcel’s characteristics and wastewater needs.
  23. 23. City of Hazel Run, MN – Wastewater Assessment & Options Completed by:
  24. 24. Outline <ul><li>Issue </li></ul><ul><li>Methods </li></ul><ul><li>Assessment </li></ul><ul><li>Options </li></ul><ul><li>Recommendation </li></ul><ul><li>Reports </li></ul>
  25. 25. Issue: Wastewater Treatment <ul><li>Public health </li></ul><ul><li>Environmental protection </li></ul><ul><li>Sustainability of small communities </li></ul><ul><li>Efficient investment of resources </li></ul><ul><li>Utilize existing and future best management practices </li></ul><ul><li>Widespread </li></ul>
  26. 26. Hazel Run is Not Alone! 1,043 Total 78 Southwest 108 Northeast 126 Metro area 162 Southeast 195 North central 374 Northwest Number of Communities Region
  27. 27. What is “proper” wastewater treatment? <ul><li>Septic tank - water-tight </li></ul><ul><li>Drainfield – Soil treatment area </li></ul><ul><ul><li>“ treat and disperse effluent” </li></ul></ul><ul><ul><li>3 feet (minimum) of unsaturated soil beneath </li></ul></ul><ul><ul><li>Size is according to bedrooms </li></ul></ul><ul><ul><li>Effluent must remain below-grade </li></ul></ul>
  28. 28. Methodology <ul><li>Conduct a site-by-site investigation </li></ul><ul><ul><li>Utility locates </li></ul></ul><ul><ul><li>Compile existing information </li></ul></ul><ul><ul><ul><li>Soils, County permits, Parcel maps, Water service maps, etc. </li></ul></ul></ul><ul><ul><li>Inspect septic tank </li></ul></ul><ul><ul><ul><li>Pump, if tank could be watertight </li></ul></ul></ul><ul><ul><ul><li>Go “fishin’! ” </li></ul></ul></ul><ul><ul><li>Locate and determine soil treatment area </li></ul></ul><ul><ul><li>Conduct soil boring to determine saturation and suitability </li></ul></ul><ul><ul><li>Verify utility locations </li></ul></ul><ul><ul><li>Determine elevations </li></ul></ul><ul><ul><li>Record all information </li></ul></ul>
  29. 29. 2-1 (west)
  30. 31. <ul><li>Keep sewage on property </li></ul><ul><li>Existing & Compliant (5) </li></ul><ul><ul><li>$500 O&M/year </li></ul></ul><ul><li>Holding tank (12) </li></ul><ul><ul><li>$5,000 + $1,200/600 O&M/year </li></ul></ul><ul><li>Type 1 Mound (10) </li></ul><ul><ul><li>$11,500 + $500 O&M/year </li></ul></ul><ul><li>Type 3 Mound (4) </li></ul><ul><ul><li>$13,000 + $500 O&M/year </li></ul></ul><ul><li>Abandon existing tanks (30) </li></ul><ul><ul><li>$4,500 </li></ul></ul>
  31. 32. <ul><li>All dwellings have a soil treatment area </li></ul><ul><li>Existing & Compliant (5) </li></ul><ul><ul><li>$500 O&M/year </li></ul></ul><ul><li>Holding tank (3) </li></ul><ul><ul><li>$5,000 + $1,200/600 O&M/year </li></ul></ul><ul><li>Type 1 Mound (10) </li></ul><ul><ul><li>$11,500 + $500 O&M/year </li></ul></ul><ul><li>Type 3 Mound (4) </li></ul><ul><ul><li>$13,000 + $500 O&M/year </li></ul></ul><ul><li>Cluster mounds (5) </li></ul><ul><ul><li>$13,800-16,300/lot + $700 O&M/year </li></ul></ul><ul><li>Abandon existing tanks (30) </li></ul><ul><ul><li>$4,500 </li></ul></ul>
  32. 33. <ul><li>Larger School & Martin Clusters </li></ul><ul><li>Existing & Compliant (4) </li></ul><ul><ul><li>$500 O&M/year </li></ul></ul><ul><li>Holding tank (2) </li></ul><ul><ul><li>$5,000 + $600 O&M/year </li></ul></ul><ul><li>Type 1 Mound (10) </li></ul><ul><ul><li>$11,500 + $500 O&M/year </li></ul></ul><ul><li>Type 3 Mound (3) </li></ul><ul><ul><li>$13,000 + $500 O&M/year </li></ul></ul><ul><li>Cluster mounds (5) </li></ul><ul><ul><li>$13,800-16,300/lot + $700 O&M/year </li></ul></ul><ul><li>Abandon existing tanks (30) </li></ul><ul><ul><li>$4,500 </li></ul></ul>
  33. 34. <ul><li>Large School Cluster </li></ul><ul><li>Existing & Compliant (4) </li></ul><ul><ul><li>$500 O&M/year </li></ul></ul><ul><li>Holding tank (2) </li></ul><ul><ul><li>$5,000 + $600 O&M/year </li></ul></ul><ul><li>Type 1 Mound (10) </li></ul><ul><ul><li>$11,500 + $500 O&M/year </li></ul></ul><ul><li>Type 3 Mound (3) </li></ul><ul><ul><li>$13,000 + $500 O&M/year </li></ul></ul><ul><li>Cluster mounds (5) </li></ul><ul><ul><li>$13,800-16,300/lot + $700 O&M/year </li></ul></ul><ul><li>Abandon existing tanks (30) </li></ul><ul><ul><li>$4,500 </li></ul></ul>
  34. 35. <ul><li>2 Large Clusters </li></ul><ul><li>Existing and Compliant (1) </li></ul><ul><ul><li>$500 O&M/year </li></ul></ul><ul><li>Type 1 Mound (10) </li></ul><ul><ul><li>$11,500 + $500 O&M/year </li></ul></ul><ul><li>Holding tank (3) </li></ul><ul><ul><li>$5,000 + $600 O&M/year </li></ul></ul><ul><li>Cluster mounds (5) </li></ul><ul><ul><li>$16,200-39,800/lot + $700 O&M/year </li></ul></ul><ul><li>Abandon existing tanks (30) </li></ul><ul><ul><li>$4,500 </li></ul></ul><ul><li>*Does not include land purchase price </li></ul>
  35. 36. Clarkfield municipal wastewater treatment connection <ul><li>$20,277/parcel - connection fee </li></ul><ul><li>$4,500 tank abandonment </li></ul><ul><li>Does NOT include </li></ul><ul><ul><li>O&M </li></ul></ul><ul><ul><li>Easement costs ($3/lineal ft) </li></ul></ul><ul><ul><li>Class D Operator </li></ul></ul><ul><ul><li>Fees </li></ul></ul>
  36. 37. Hazel Run – Settling Ponds <ul><li>$47,756/parcel - connection fee </li></ul><ul><li>$4,500 tank abandonment </li></ul><ul><li>Does NOT include </li></ul><ul><ul><li>O&M </li></ul></ul><ul><ul><li>Easement costs </li></ul></ul><ul><ul><li>Class D Operator </li></ul></ul><ul><ul><li>Land acquisition (10 acres) </li></ul></ul>
  37. 38. Recommended Option <ul><li>$377,900 capital cost </li></ul><ul><li>No capital cost for existing and compliant ISTSs </li></ul><ul><li>Legion & City Hall only holding tanks </li></ul><ul><li>$11,500-16,300 for new ISTSs </li></ul><ul><li>Clusters treat wastewater off-lots that are not suitable </li></ul><ul><li>Small clusters (<2,500 gallons/day) </li></ul>
  38. 39. Reporting <ul><li>Community Assessment Report (CAR) </li></ul><ul><ul><li>Complete, awaiting comments from community, Pollution Control Agency, and USDA-Rural Development </li></ul></ul><ul><ul><li>4 complete copies to City Council </li></ul></ul><ul><li>Preliminary Engineering Report (PER) </li></ul><ul><ul><li>Draft ready for comment </li></ul></ul>
  39. 40. Questions / Comments?
  40. 41. <ul><li>The following three slides were not presented at the community meeting but were included in case we needed to find and show community members cost numbers associated with individual parcels during the meeting. </li></ul>