Measure Percolation.

Determine the capability at which your soil absorbs liquid.

How to Run a Percolation Test Part 3

The following steps outline the procedure for performing a Percolation Test. This is part 3 in our series on How to Run a Percolation Test. These steps should follow the previous steps taken from part 1 of our series on How to Run a Percolation Test.

The following is a summary of when and how a perc test may be failed during the presoak.

  1. No 48-inch test hole dug.
  2. Evidence of seasonal high water table within 24 inches of the surface. (The test may be continued, but only at the request of the tester.)
  3. Improper presoaking - less than 12 inches of water in any test hole at any time.
  4. Filled lots when the Health Department has not been previously notified.
  5. Isolation distances or other location problems with the test area.
  6. There is evidence of impropriety.

The following is a summary of how and when a perc test may be failed during the test itself.

  1. At least half of the test holes fail to drop one inch or more in any of the hourly readings.
  2. There is evidence of impropriety.

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