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Input parameters <br />Time 1 <br />Value <br />Units <br />H 1 = Initial reading <br />96.2 <br />cm <br />a = area of standpipe <br />0.635 <br />cm2 <br />H 2 = final reading <br />75.2 <br />cm <br />A = Area of sample (brass liner) <br />11 days <br />19.17 <br />cm2 <br />flog h1 /h2 <br />0.10696 <br />263 <br />L = length of sample <br />0.0798 <br />3.10 <br />inches <br />t = elapsed time <br />946800 <br />seconds <br />7.874 <br />cm <br />k = permeability <br />6.79E -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 />11 days <br />8/13(a�10:04 <br />96.2 <br />8/24(8:53 <br />75.2 <br />263 <br />946800 <br />0.0798 <br />MATERIAL <br />Proctor 1P <br />105.4 pcf <br />MDD <br />17.1% <br />OMC <br />SAMPLE <br />Sandy Clay (CL) <br />FALLING HEAD PERMEABILITY CALCULATION <br />PROJECT: Western Gravel E & P <br />NUMBER: 10 -8718 <br />DATE: 8/24/2010 <br />PERM NO. 1 <br />k = 2.303 * a *UA *t (log h1 /h2) <br />TEST READINGS <br />