percolation test การใช้

• On Percolation test, someone added a crude ASCII formula.
• Percolation tests measure the rate at which clean water disperses through a disposal trench into the soil.
• A percolation test is required prior to installation to ensure the porosity of the soil is adequate to serve as a drain field.
• And it is exactly the kind of land that developers covet, since its sandy soil easily passes the percolation tests required for septic systems.