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Job No: 360100-003-4 LRM a8,e 5 of 5 <br /> TEILESTOTask: Initial Compacted Backfill Computed By W. iccol Date. 2/26/18 <br /> p P <br /> S O L U T I O N S• i C O R P O R A T E U <br /> Leakage Estimate <br /> 111 Checked By: E. Humphrey Da+; 2/27/18 <br /> Calculations Con'd: <br /> 3. Compare model results to criteria by settin Qleakage = model calculated leakage <br /> - _ <br /> - 1.ear�a , 1 weal"na - <br /> Fronk vuocieL ov prevLous page <br /> ft ft' <br /> C..✓2 •Q.23•ft•L.�tAl l < l_wall"nava <br /> dad dad•ft <br /> . . aii C,.D3• <br /> "� a1.1:tea`.:'± <br /> .)2L/1.-Ft` <br /> statew evl.t Ls true,therefore Leaizage through average bacizfi,LL should vv.ee`_ <br /> 0.01%• < v'` Ley rectuLrew&etAts. fs 2.5 <br /> .9iCT 01,4 <br /> Results: <br /> • Both methods returned nearly identical results for the geometric mean case <br /> • Nine of the ten samples all meet or exceed the estimated criteria <br /> • Eight of the samples exceed the criteria by over a factor of 2 <br /> Discussion Points: <br /> 1. The permeameter tests were performed with a 50 psi confining pressure, similar to the <br /> pressure exerted by overburden piled on top of itself. at the backfill base This mimics <br /> anticipated field conditions <br /> 2. The geometric mean and median are identical for the sample set indicating the data set is <br /> likely log-normally distributed, meaning a majority of the samples grouped on the low end <br /> for permeability <br /> 3. LRM commits to follow their material selection and placement plan to ensure that <br /> compaction and liner performance criteria are met <br /> Conclusion <br /> The overburden materials can be used in the engineering and construction of the compacted <br /> soil liner. <br />