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Table 1 - OAR 340-71-220
Minimum Separation Distances

Items Requiring Setback From Sewage Disposal Area Including Replacement Area From Septic Tank and Other Treatment Units, Effluent Sewer and Distribution Units
  1. Groundwater Supplies
100' 50'
  1. Temporarily Abandoned Wells
100' 50'
  1. Springs:
  • Upgradient:
  • Downgradient:
 

50'

100'

 

50'

50'

  1. Surface Public Waters:
  • Year Round (Perennial)a
  • Seasonal (Intermittent)a
 

100'

50'

 

50'

50'

  1. Intermittent Streams:
  • Piped (Watertight not less than 25' from any part of the on-site system):
  • Unpiped:
 

20'

50'

 

20'

50'

  1. Groundwater Interceptors (GWI)
  • On a Slope of 3% or Less:
  • On a Slope Greater than 3%:
  • Upgradient:
  • Downgradient:
 

20'

 

10'

50'

 

10'

 

5'

10'

  1. Irrigation Canals:
  • Lined (Watertight Canal):
  • Unlined:
  • Upgradient:
  • Downgradient:
 

25'

 

25'

50'

 

25'

 

25'

50'

  1. Cuts Manmade in Excess of 30 Inches (Top of Downslope Cut):
  • Which Intersect Layers that Limit Effective Soil Depth Within 48 Inches of Surface:
  • Which do not Intersect Layers that Limit Effective Soil Depth:
 

 

50'

25'

 

 

25'

10'

  1. Escarpments:
  • Which Intersect Layers that Limit Effective Soil Depth:
  • Which do not Intersect Layers that Limit Effective Soil Depth:
 

50'

25'

 

10'

10'

  1. Property Lines:
10' 5'
  1. Water Lines:
10' 10'
  1. Foundation Lines of any Building or Structure:
10' 5'
  1. Underground Utilities:
10' --

    aThis does not prevent stream crossing of pressure sewer effluent sewers.

 

 

 

 

 

 

 

Thursday April 06, 2017 08:12 AM

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