1. Basic Treatment Train Diagrams Keep in mind…variations are ALWAYS possible

2. Basic Gravity System Components Source Septic tank with effluent screen Drainfield Soil Distribution Box

3. Shallow placement drainfield Limiting layer Suitable Fill Drainlines and Gravel Aerobic Soil

4. Areal Fill (“Mound”) drainfield Limiting Layer Suitable Fill Trenches Aerobic Soil

5. Pressure-dosed gravity Source Septic Tank with effluent screen Drainfield Aerobic Soil Dosing Tank Pressure manifold Pressure regulating valve

6. Basic LPP System Components Source Septic Tank with Effluent screen LPP Laterals Aerobic Soil Dosing Tank Turn up Manifold Pressure regulating valve

7. Basic Drip Irrigation System Components (Direct ST Effluent) Source Septic Tank with Effluent screen Drip Laterals and supply and return manifolds Aerobic Soil Dosing Tank Headworks assembly

8. Basic Drip Irrigation System Components (Advanced-treated effluent) Source Septic Tank with Effluent screen Drip Laterals and supply and return manifolds Aerobic Soil Dosing Tank Headworks assembly Advanced treatment and possible recirculation

9. Basic sand filter system components To drainfield Observation port Sampling Septic Tank with effluent screen Dosing Tank Underdrain

10. Type A Peat Filter System Peat Bio-filter Module(s) Fill Mound Septic Tank Dosing Tank Gravel Pad

11. Type B Peat Filter System (gravity-fed drainfield) Fill Mound Septic Tank Dosing Tank Gravel Pad Peat Bio-filter Module(s) To Drainfield Drop Box (Sampling point)

12. Type B Peat Filter System (pressure-dosed drainfield) Fill Mound Septic Tank Dosing Tank Gravel Pad Peat Bio-filter Module(s) To Drainfield Pump tank