Laserfiche WebLink
TABLE 1 <br />' AVERAGE POROSITY and <br /> INTRINSIC PERMEABILITY <br />' Material Porosity Intrinsic Permeability <br /> o/ (darty, D) Cm2 <br />' Clay 45 00005 4 9 x 10-32 ` <br /> Sand 35 50 4 9 x IV <br />' Gravel 25 5,000 4 9 x 10' <br /> Gravel and Sand 20 500 49 x 10-6 <br /> 1 Sandstone 15 5 4 9x 10'8 <br />' Dense Limestone and Shale 5 Cos 4.9 x 10'10 <br /> Quartzite, Granite 1 1 00005 4.9 x I012 <br /> Dne darty (D) = 0 987 x 10-8 =12 <br /> TABLE 2 <br /> LYTRINSIC PERMEABILITY and <br /> HYDRAULIC CONDUCTIVITY <br /> Matenal Fntnns3c Permeability Hydraulic Conductivity <br /> CM2 Darcy(D) cm/s m/yr <br />' Clayey Silts 10'12 to 10'9 10`4 to 10-1 10-7 to 10-4 0 032 to 32 <br /> Silty Sand 7x10-'1 to 9X10`7 7x10-3 to 90 7x10-to 9X 10-2 1 2 2 to 28,401 <br /> Clean Sand 10.9 to 10 ' 10-1 to 103 10-4 to 1 32 to 320,000 <br /> 1Gravel 10� to 10-3 1 pz to 103 10-1 to 10' 3 2,000 to 3 Zx 10 r <br /> 1 cm/s=315,567 m/yr <br />' References <br /> Table I Approximate average Porosity and lntr n a Permeability of various materials taken fromvdroloev for <br />' Engineers by Lansley,Kohler and Paulhus,c 1982 Table 6-2 <br /> Table 2- Table of Ranges of Intrimc Pcrmcability and Hydraulic Conductivity from Spinnaker PLUS and <br /> HyperVer3tilate modeling program based an the article'A Practical Approach to the Design,Operation,and <br /> T Monitoring of Soil Venting Systcrns'by P.C Johnson cL al <br />