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I I I I I I I I ! I Doug ~m~- 6821 152nd Avenue NW - Mave some problems with the grade~Mr~ Cook states that it will be going from a 3:1 to a 4:11. !~hi~ may eliminate erosion but create more leachate because you wi!l ~e getting more absorption. Can't see where Waste Management is giving the community a lot; you are giving us an 80,000~009 gallon septic tank full of leachate. How are you going to control runoff and Spring flooding? If Waste Management has been the NaJority user and possessor, why aren't they required to put inishields, leachate system and drainage system, regardless of the conditional use permit being granted. Mr. CoOk ~ Changing the slope from 3:1 to 4:1, the slope (in the equati~n~for water balance for a landfill site) is not one of the major ~omzerns for infiltration; it is the type of vegetation and soil ,t~at you have on that slope. If you are going down to a 2% or~%' slope, then infiltration would be significantly increased. In my presentation, I did not mean to imply that there are 80,0010500~ gallons of leachate contained in that site right now. The ~rea that would be covered by the infiltration barrier assoCisted with the environmental improvements would prevent 80,00'O~,000 gallons of leachate from being generated. Mr. DoUg Mamm - What about the leachate contained in the original site?' Wiill you pump all of it out and haul it away? Mr CoDk Leachate collected in the system would be removed on a daii!Y ~asis from that site. Leachate that is already in the old land~ill~ site is more than likely infiltrating the ground wate~ an~ there is nothing that can be done at this time. The only ltThi~g that can be done is to construct an infiltration barrier ~o stop the generation of leachate. Mr. D~°UgiHamm - Waste Management is saying they will stop the gener~ti~n~~=uz 'new' leachate. Mr. Cook - That is correct. Mr. DOUg H~ - Why isn't Waste Management proposing adding barriers on the East and West? Mr. Cook - At this time, we feel these environmental improvements proposed are the most reasonable to construct and would provide the most.benefit for what is being proposed. They will prevent contamin~}tion from the proposed site from entering the ground water.land they will facilitate the reduction of generation of leachate!in the old site. Naden9 KSng - 6604 153rd Lane - If the existing landfill is alrea4y Seaching out, what does Waste Management have to offer us byi~pu~ting up the Northern expansion area? Mr. C0oki- In the existing site, if an infiltration barrier was place40yer the Northern area, it would reduce the amount of leachate generated by approximately 80,000,000 gallons over a twenty y,~ar period. Council/P & Z Public Hearing Page 11 of 23