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penetrating the surrounding environment. <br />Overlying the liner section is the leachate collection layer. The leachate collection layer consists <br />of either one foot of highly permeable drainage sand or a synthetic drainage material called a <br />geocomposite. The geocomposite is comprised of high density polyethylene channels <br />manufactured to rapidly convey liquids and is considered equal to the transmission capacity of <br />one foot of drainage layer sand. <br />6° PERFORATED HDPE SDR 1 <br />LEACHAiE GCILEGT[DN PIPE <br />~CGMSE AGGRGATE <br />~ ~ '~~iEXT]LE <br />12"' GRANULAR GRA INAGE LAYER~/,'"\/ \ _ _ ~' <br />12` INTERACQ[ATE AGGRGATE V" r~ i r~ "~ r <br />/~\ _~ _ ~ <br />~ y ; <br />.( ~~~~~! <br />~ V ~~~ ~ ~ ~ ~ ~6D mt 1 H6PE GECAiEABRANE <br />3 3 <br />,~ ~~~ ~ ~ ~ ;~ /~. ~ ~ ,43~ }\~,': .\' \~29° CLAY BARRIER LAYER <br />` `\.~.N1~~~``, '~ `,~~~~~; ~'\ \''n\~:~'1~• 3N~SUBGRADE <br />Liner System <br />The final cover section is similarly designed with a layer of buffer material installed over the final <br />waste elevation prior to the placement of a 40 mil. linear low density polyethylene liner material <br />iF that is overlain by either a sand drainage material or a synthetic drainage material, <br />,. <br />geocomposite. The final layer of the landfill cover section is a layer of soil material that can <br />sustain and promote vegetative growth. <br />z ~~~TOPSDIL <br />~~ <br />z COVER SOILS <br />~z <br />N ~~ <br />GEONET <br />TEXTURED 40 mil <br />~ ~fl !, \~'A r~ / t,~, . ~` ~, LLdPE GEOMEM6RANE <br />BUFFER SO1LS <br />Cover System <br />The landfill base liner, in conjunction with the final cover liner, completely encapsulates the MSW <br />materials from the surrounding environment. <br />~_.- <br />Elk River Landfill SDA ~ Section 1-3 <br />Land Use Application lN2nLl< <br />