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Is <br />' Table A I Estimation of soil permeability (k) from CPT soil behavior charts Based <br /> on a CPT chart by Robertson et al, 1986 (Figure 5 7) <br /> 1 <br />' Range of soil permeability <br /> Zone Soil behaviour type (SBT) k(m/s) <br />' I Sensitive fine grained 3 X 10-' to 3 X 10-' <br /> 2 Organic soils 1 x 10-1 to I X 10-6 <br />' 3 Clay Ix10-14toIx10_g <br /> 4 Silty clay to clay 1 x 10-1 to I X lo-, <br /> 5 Clayey silt to silty clay 1 X lo-8 to 1 x 10-1 <br /> 6 Sandy silt to clayey silt 1 x 10-7 to I x 10-1 <br /> 7 Silty sand to sandy silt 1 x 10-1 to I x 10-6 8 Sand to silty sand I x 10-1 to 1 x 10-4 <br /> 9 Sand Ix10-4toIX10-3 <br /> I 10 Gravelly sand to sand I x 10-3 to 1 <br /> I I *Very stiff fine-grained soil 1 X 10-9 to I x 10-7 <br /> 12 *Very stiff sand to clayey sand 1 x 10-8 to 1 X 10--6 <br /> I <br /> *Overconsolidated or cemented <br /> I <br /> r <br /> r <br /> r <br />