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:

# 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:

 

# 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>

{{plainlist|Where:

{{plainlist|Where:

''d₁₀'' = the soil particle diameter for which 10% of all soil particles are finer (smaller) by weight (mm),

''d₁₀'' = the soil particle diameter for which 10% of all soil particles are finer (smaller) by weight (mm),

''C'' = is a shape fitting parameters (see below), and

''C'' = is a shape factor (see below), and

''K'' = permeability (mm/hr)

''K'' = permeability (mm/hr)

==Safety Correction Factor==

==Safety Correction Factor==