Soil Percolation Test Procedure (EWB internship)

This is a soil percolation and infiltration rate test procedure that I’ve research and developed for my internship project.


Testing Procedures

Soil percolation test

  • Procedure
    • Drill at least three holes with a diameter of 15 to 20 cm and a depth of 91 to 274 cm,
    • Fill the holes with water,
    • Then measure for the amount of water decreases within a period of time,
    • Use the formula (Percolation = Amount of water (ml)Time taken (min)) to calculate for the percolation rate.
  • Equipment
    • Something to dig with
    • Water
    • Timer
    • Measuring stick
  • Standard for Effluent Percolation Rate (EPR)
    • Poor soakage – 10 litre/m2/day
    • Good soakage – 15 litre/m2/day

Soil infiltration test

  • Procedure
    • Fill a 30 by 20 cm container with soil and pressure it to make it compact like the ground
    • Cut a 5 inch (127mm) PVC pipe into a 20 cm piece and make a 5 cm, a 10 cm, and a 15 cm mark on the inside of the pipe
    • Then vertically bury 5 cm of the PVC pipe into the soil in the container
    • Pour water into the buried PVC pipe then start the timer
    • Then record the time when the water reaches each mark
  • Equipment/materials
    • 5 inch PVC pipe
    • 30 x 20 cm container
    • Soil
    • Water
    • Timer
    • Notebook & Pen
    • Marker
  • Source

Water flowing through the filtration

  • Procedure
    • Start the timer when the first drop of water get to the filter in the second pit
    • Stop the timer when the water comes out of the PVC pipe into the leach field
  • Equipment
    • Timer
    • Notebook & Pen


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