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Input parameters <br />Time 1 <br />Value <br />Units <br />H 1 = Initial reading <br />109.9 <br />cm <br />a = area of standpipe <br />0.635 <br />cm2 <br />H 2 = final reading <br />94.3 <br />cm <br />A = Area of sample (brass liner) <br />12 days <br />19.17 <br />cm2 <br />'log h1 /h2 <br />0.06649 <br />283 <br />L = length of sample <br />0.0551 <br />3.14 <br />inches <br />t = elapsed time <br />1018800 <br />seconds <br />7.9756 <br />cm <br />k = permeability <br />3.97E -08 <br />cm /sec <br />Date <br />Time 1 <br />h 1 <br />Time 2 <br />h 2 <br />Elapsed Time <br />hours <br />seconds <br />rate per hour <br />12 days <br />8/122:03 <br />109.9 <br />8/248:54 <br />94.3 <br />283 <br />1018800 <br />0.0551 <br />MATERIAL <br />Proctor 2P <br />111.1 pcf <br />MDD <br />17.5% <br />OMC <br />SAMPLE <br />Claystone (CL) <br />FALLING HEAD PERMEABILITY CALCULATION <br />PROJECT: Western Gravel E & P <br />NUMBER: 10 -8718 <br />DATE: 8/24/2010 <br />PERM NO. 2 <br />k = 2.303 * a *L/A *t (log h1/h2) <br />TEST READINGS <br />