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<br />, <br />24, <br /> <br /> <br />0[11845 <br /> <br />. cement miKes and'$unitemay.alsobe. .c-cn-sider.e4-as"pos-sibilities. <br /> <br />necently. deve-l{)pem, .plas ti cmembranes-c.an .nowbe.insta lled at <br /> <br />p,rice.s..c.ompetiUve with' othe,r.typeso.fpav:ement. Information on <br /> <br />eachdf the'methods is available from the'. ml1.nufactul'ers.and dis- <br /> <br />til"ibubQl'il. <br /> <br />. Another installation of this typei&t:hes-o~e/l'lted r::trick <br /> <br />t-an1<l~I'now being used toa Hmited.e*tend ins-<'lveral localities. <br /> <br />. <br /> <br />These' resemble a~istern in'thei.r..a<::tion. Thedra.inage aJiea is <br /> <br />. ..o<;>ve red with 'cGnc.reteP-ave~ent'-Gr .c.orr'tlga.ted..metalso. that run- <br /> <br />. .off. '~ppl'Qa<l.hesc.-lOO percent.'. 'The-wat.er..4r.ai,nsto. steel 0 l' is.onc l' e te <br />. , . <br /> <br />. . -baRks from. which 'd~sti-.ibu:tion i&~de.b.y.pipeline and autQmatic <br />valve.st'l,&t~e.k':vVater t*~ughs. Thecost.of thi-s ty-peof treatment <br /> <br />, '" ' . . <br />is high. butthe.ann'li.al-equivalentcos.t1-s..said...j;{).compacre favor- <br /> <br />. <br /> <br />. ...ablywith other bypes.o(develGpment..Beo.aus-e..<>f Hscost the in- <br /> <br />"iftaHati-oRil.e.houldbe re~trictedtoareashaving relatively high <br />..,.aRd . reliacble.:p-r&$ipitaUli>n. <br /> <br />" <br />... .PavemeRt~~n.d,:CGmpaction methoGs.-al'e.e,"pel'lsive ,u1d <br /> <br />nliMlrally willn<;>t:'.be.u~edwhereotherleS$..costly-sourGes'lf water <br /> <br />e,a'l'l-.lil~-Gbtail'led. ..CostsPel" ae re--Gf-l.anGl..treated,bycomP<lic ti on 0 l' <br /> <br />..Q,ppli-e'a.ti.an.:*.:ch~ieals:willvary,upwardf-rom.$Z.OO ,<rl~en:di ng <br /> <br />.on ty""'..ef.t.reabment....tee.a.ion.o{area.. -aI'lGmoha.pa.cter .ofterr ain. <br />r'"' ., J l'i ,_' " <br /> <br />.Gocs~--of..pavin!t.will r,un$~,OOO..an..aCrer'<:lrp'ore. . The number of <br />