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The proposed design is consistent with the existing design in that it incorporates a state, of <br />the art composite liner system; 2 feet of compacted clay soil barrier overlain by a 60 mil <br />high density polyethylene flexible membrane liner. Together, these two components of <br />the liner system prevent contaminants from penetrating the surrounding environment. <br />Overlying the liner section is the leachate collection layer. The leachate collection layer <br />consists of either 1 foot of highly permeable drainage sand or a synthetic drainage <br />material called a geocomposite. The geocomposite is comprised of high density <br />polyethylene channels manufactured to rapidly convey liquids and is considered equal to <br />the transmission capacity of 1 foot of drainage layer sand. <br />LEAUH AIERGa IErT lOF7'~PIPE~~ <br />\r ~COAR:E AGGRCATE <br />_~^ <br />12" 4P.ANlILAfl PRA WAGE LAYER-~, ~ ~ GEOIEXi)LE <br />\_ <br />12' iNTEReEO(dlE AGGRGA~E~.~ ~ ~ ~ ~` <br />.}~'~M ~ Ib _JI ~ ._.sp ml l RDPE GEIyAEh6RANE <br />nl l 3 ~ <br />~_".. <br />j -~ ~~- _- _ ~ ~ ~ , ~ C~~~. .~~ '~.:,,L ''~-2C` CL A'f eARRfEF. LATER <br />+~~ 7Ii ~ ~~hi~ {~t~ `;~1 14 ~.~~' ~~ , 1T. ;k~ ~ iA ^•"~-SUHGRAOf. <br />Liner System <br />The final cover section is similarly designed with a layer of buffer material installed over <br />the final waste elevation prior to the placement of a 40 mil linear low density <br />polyethylene liner material that is overlain by either a sand drainage material or a <br />synthetic drainage material, geocomposite. The final layer of the landf 11 cover section is <br />a layer of soil material that can sustain and promote vegetative growth. <br />T:10742\iAOC\CilrAppt:eb\PEB Repon_6nRl (2).doc '1 _ O <br />