API RP 581 - 3rd Ed.2016 - Add.2-2020 - Risk-Based Inspection Methodology

RISK-BASED INSPECTION METHODOLOGY, PART 5—SPECIAL EQUIPMENT 5-25
Table 4.7⎯Soil Types and Properties for Storage Tank Consequence Analysis
Soil Type
Hydraulic Conductivity
for Water Lower Bound
(in/s)
Hydraulic Conductivity
for Water Upper Bound
(in/s)
Soil Porosity
Gravel 3.94E-01 3.94 0.40
Coarse Sand 3.94E-03 3.94E-02 0.33
Fine Sand 3.94E-04 3.94E-03 0.33
Very Fine Sand 3.94E-06 3.94E-04 0.33
Silt 3.94E-07 3.94E-06 0.41
Sandy Clay 3.94E-08 3.94E-07 0.45
Clay 3.94E-09 3.94E-08 0.50
Concrete-Asphalt 3.94E-12 3.94E-11 0.3
Table 4.7M⎯Soil Types and Properties for Storage Tank Consequence Analysis
Soil Type
Hydraulic Conductivity
for Water Lower Bound
(cm/s)
Hydraulic Conductivity
for Water Upper Bound
(cm/s)
Soil Porosity
Gravel 1.00E00 1.00E01 0.40
Coarse Sand 1.00E-02 1.00E-01 0.33
Fine Sand 1.00E-03 1.00E-02 0.33
Very Fine Sand 1.00E-05 1.00E-03 0.33
Silt 1.00E-06 1.00E-05 0.41
Sandy Clay 1.00E-07 1.00E-06 0.45
Clay 1.00E-08 1.00E-07 0.50
Concrete-Asphalt 1.00E-11 1.00E-10 0.3