Question: how to do a soil percolation test?
Answer: Step 1: Dig Hole. Dig a hole at least 12” in diameter by 12” deep, with straight sides. ... 
Step 2: Fill Hole with Water. Fill the hole with water, and let it sit overnight. ... 
Step 3: Refill Hole with Water. ... 
Step 4: Measure Water Level. ... 
Step 5: Measure Drainage Every Hour.