To perform a percolation test on a soakaway hole, you will need the following materials:
- A clean, empty bucket
- A stopwatch or timer
- A supply of clean water
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Find an appropriate location: Select a location for the soakaway hole that is at least 10 meters (32.8 feet) away from any buildings, water sources, or other structures. The hole should also be at least 1.5 meters (4.9 feet) away from any trees or other plants.
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Excavate the hole: Dig a hole that is approximately 60 centimeters (2 feet) in diameter and at least 1.2 meters (4 feet) deep. The hole should be deep enough to reach the water table.
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Fill the hole with water: Slowly fill the hole with water, using the bucket to measure the amount of water added. Continue adding water until the hole is full and the water level stops rising.
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Time the drainage: Once the hole is full, start the stopwatch or timer and record the time it takes for the water level to drop by 30 centimeters (1 foot). Repeat the process three times and record the average time it takes for the water to drain.
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Calculate the percolation rate: The percolation rate is calculated by dividing the volume of water in the hole (in liters) by the time it takes for the water to drain (in minutes). The resulting number is the percolation rate in liters per minute.
It is important to use caution when performing a percolation test. Make sure to follow all safety guidelines and to obtain any necessary permits before starting the test. If you are not confident in your ability to safely perform a percolation test, it is best to hire a professional engineer or soil scientist.
