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MEMO <br /> "'� District Board,Leadville Sanitation District <br /> ik Union Milling—Permit M1990-057 <br /> M, """ Job No.:1119.2e <br /> March 18,2024 <br /> consuu;-.,.,-, . JtS'NScns <br /> Page 2 of 4 <br /> zUNT <br /> Q PLACER <br /> I Fd Rebee wNNaito dlow RoCep <br /> \1 <br /> LS,OBIT 1194.0ZN ------ <br /> �\ 00.02•0,7E <br /> r;;n <br /> i /2�-— 7.dw_ --- — \ O p Fee R.hr wAted rg <br /> -�ti P1re Cop <br /> I, \ NOWA±,(6,o.os I .Colveri <br /> 0 0 \ 1 (4 <br /> l S(pe:Td. \ ySee Detail \_T \c d 1 i= sae Pmn re[1: <br /> _I t <br /> r o <br /> Tailings Pod *; d <br /> / _O� <br /> r <br /> Tdvge Lia <br /> (AM=ZO' i <br /> Wt<b) law,*N 'VG. <br /> / H <br /> ro / <br /> h <br /> .o , <br /> X. <br /> / \ e <br /> • 1 <br /> 6713 0 8"MTN.W / — - .` <br /> Figure 1.Existing Sanitary Sewer line. <br /> The District is currently under a compliance schedule to reduce inflow and infiltration into the collection system. <br /> Inflow is water,other than wastewater,that enters a sewer system from sources such as roof leaders,cellar drains, <br /> yard drains,area drains,foundation drains,drains from springs and swampy areas,manhole covers,cross sections <br /> between storm drains and sanitary sewers,catch basins,cooling towers,storm waters,surface runoff,street wash <br /> waters or other drainage. Inflow does not include,and is distinguished from,infiltration. Infiltration is water other <br /> than wastewater that enters a sewer system(including sewer service connections and foundation drains)from the <br /> ground through such means as defective pipes, pipe joints,connections,or manholes.Infiltration does not include, <br /> and is distinguished from,inflow. <br /> The new crushing facility could impact the collection system by disturbing the manholes,pipes,and service lines <br /> resulting in an increase in the infiltration of groundwater into the collection system.This increase in infiltration is in <br /> direct conflict with the CDPHE compliance schedule to reduce inflow and infiltration into the collection system. <br /> Damage to the collection system could also result in exfiltration or seepage of wastewater into the ground which <br /> would be a direct violation of the Clean Water Act.The cost of repair of this infrastructure would fall to the Sanitation <br /> District and the residents of Leadville. The District's WWTF consists of a headworks for screening and grit removal, <br /> two aeration basins,two covered clarifiers,a polishing pond,and a chlorine contact chamber for disinfection. Nearby <br /> seismic activity from the proposed Mill could also have detrimental effects to the existing WWTF structures that are <br /> required for wastewater treatment and permit compliance. <br />