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I <br /> • TABLE I <br /> AVERAGE ?OROS=and <br /> INTRINSIC PERMEABILITY <br /> IMate.—al Porosity Intrntstc Permeabdity <br /> % <br /> ( ' D) cm- <br /> Clay 45 00005 4 9 x 1 lx <br /> Sand 35 50 4 9 x 10' <br /> Gravel 25 5,000 4 9 :, 10-5 <br /> gravel and Sand 20 500 4 9 x 10-6 <br /> Sandstone 15 5 4.9 x 191 <br /> Dense Limestone and Shale 5 005 4 9 x 10-10 <br /> Quartzite, Granite 1 00005 d '9 x 10-32 <br /> One darty(D) = 0 987 x r0-8 cm2 <br /> I • <br /> TABLE 2 <br /> LNTRUiSIC PER.NfEABff=and <br /> HYDRAULIC CONDUCTIVITY <br /> Iatenal Intrinsic Permea.bigty I Hydraulic Conductivrty <br /> Crri� Darcy(,'} CM/S <br /> Clayey Silts 10-12 to 10'9 10-4 to 10-1 10-7 to 104 0.032 to 32 <br /> ISilty Sand 7x10-31 to 9x10-7 7xI0-3 to 90 7x10`to 9x10-2 2 2 to 28,401 <br /> Clean Sand 10-1, to 10-5 10-1 to 103 10-4 to 1 32 to 320,000 <br /> Gravel 10� to 10'3 101 to 105 10-1 to 102 32,000 to 3 2x107 <br /> 1 cm/s-=- 315,567 m/yr <br /> References <br /> Fable 1. Apprommate average Porosity and Tnirms7c Permeabolty of vanous materials ial.es wdrol v for <br /> IEngoeers by Lansley,Kohler and Paulhu%c 1982 Table 6-2 <br /> Table 2- Table cf Ranges of Intrumc Permeability and Hydraulic Conduarvity frann spinnaker pLus aad <br /> I HyperVent:late modeling program based on the article"A Practical Approach to the Destgn,Operation,and <br /> Monitoring of Soil Venting Systems"by P.C.Johnson et. al. <br /> I <br />