Changes

===Data Analysis===

===Data Analysis===

As the Soil Grain Size Analysis method is only approved for soils with d₁₀ between 0.1 and 2.5 millimeters, the Hazen formula <ref>Hazen, A. (1893). Some physical properties of sand and gravel with special reference to the use in filtration. 4th Annual Report, State Board of Health, Boston.</ref> may be used to calculate the soil permeability. The calculated soil permeability shall be considered to be the measured infiltration rate:

As the soil grain size analysis method is only approved for soils with d₁₀ between 0.1 and 2.5 millimeters, the Hazen formula <ref>Hazen, A. (1893). Some physical properties of sand and gravel with special reference to the use in filtration. 4th Annual Report, State Board of Health, Boston.</ref> may be used to calculate the soil permeability. The calculated soil permeability shall be considered to be the measured infiltration rate:

<math>K=C\cdot {\left (d_{10}\right )^{2}}</math>

<math>K=C\cdot {\left (d_{10}\right )^{2}}</math>