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===Data Analysis===
===Data Analysis===
# As the Soil Grain Size Analysis method is only approved for soils with d<sub>10</sub> between 0.1 and 2.5 millimeters, the Hazen formula (below) may be used to calculate the soil permeability (K).
# As the Soil Grain Size Analysis method is only approved for soils with d<sub>10</sub> 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.
# Soil permeability shall be considered to be the measured infiltration rate:
# Soil permeability shall be considered to be the measured infiltration rate: